diff --git a/fs/buffer.c b/fs/buffer.c index 49106127a4aa..1864d0b63088 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -2935,6 +2935,8 @@ int submit_bh(int rw, struct buffer_head * bh) BUG_ON(!buffer_locked(bh)); BUG_ON(!buffer_mapped(bh)); BUG_ON(!bh->b_end_io); + BUG_ON(buffer_delay(bh)); + BUG_ON(buffer_unwritten(bh)); /* * Mask in barrier bit for a write (could be either a WRITE or a diff --git a/fs/ext2/super.c b/fs/ext2/super.c index 5c4afe652245..e3c748faf2db 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -1093,6 +1093,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) brelse(bh); failed_sbi: sb->s_fs_info = NULL; + kfree(sbi->s_blockgroup_lock); kfree(sbi); return ret; } diff --git a/fs/ext3/super.c b/fs/ext3/super.c index 599dbfe504c3..d8b73d4abe3e 100644 --- a/fs/ext3/super.c +++ b/fs/ext3/super.c @@ -2021,6 +2021,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent) brelse(bh); out_fail: sb->s_fs_info = NULL; + kfree(sbi->s_blockgroup_lock); kfree(sbi); lock_kernel(); return ret; diff --git a/fs/ext4/Makefile b/fs/ext4/Makefile index a8ff003a00f7..8a34710ecf40 100644 --- a/fs/ext4/Makefile +++ b/fs/ext4/Makefile @@ -5,8 +5,8 @@ obj-$(CONFIG_EXT4_FS) += ext4.o ext4-y := balloc.o bitmap.o dir.o file.o fsync.o ialloc.o inode.o \ - ioctl.o namei.o super.o symlink.o hash.o resize.o extents.o \ - ext4_jbd2.o migrate.o mballoc.o + ioctl.o namei.o super.o symlink.o hash.o resize.o extents.o \ + ext4_jbd2.o migrate.o mballoc.o block_validity.o ext4-$(CONFIG_EXT4_FS_XATTR) += xattr.o xattr_user.o xattr_trusted.o ext4-$(CONFIG_EXT4_FS_POSIX_ACL) += acl.o diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c index 53c72ad85877..e2126d70dff5 100644 --- a/fs/ext4/balloc.c +++ b/fs/ext4/balloc.c @@ -19,7 +19,6 @@ #include #include "ext4.h" #include "ext4_jbd2.h" -#include "group.h" #include "mballoc.h" /* @@ -88,6 +87,7 @@ unsigned ext4_init_block_bitmap(struct super_block *sb, struct buffer_head *bh, ext4_group_t block_group, struct ext4_group_desc *gdp) { int bit, bit_max; + ext4_group_t ngroups = ext4_get_groups_count(sb); unsigned free_blocks, group_blocks; struct ext4_sb_info *sbi = EXT4_SB(sb); @@ -123,7 +123,7 @@ unsigned ext4_init_block_bitmap(struct super_block *sb, struct buffer_head *bh, bit_max += ext4_bg_num_gdb(sb, block_group); } - if (block_group == sbi->s_groups_count - 1) { + if (block_group == ngroups - 1) { /* * Even though mke2fs always initialize first and last group * if some other tool enabled the EXT4_BG_BLOCK_UNINIT we need @@ -131,7 +131,7 @@ unsigned ext4_init_block_bitmap(struct super_block *sb, struct buffer_head *bh, */ group_blocks = ext4_blocks_count(sbi->s_es) - le32_to_cpu(sbi->s_es->s_first_data_block) - - (EXT4_BLOCKS_PER_GROUP(sb) * (sbi->s_groups_count - 1)); + (EXT4_BLOCKS_PER_GROUP(sb) * (ngroups - 1)); } else { group_blocks = EXT4_BLOCKS_PER_GROUP(sb); } @@ -205,18 +205,18 @@ struct ext4_group_desc * ext4_get_group_desc(struct super_block *sb, { unsigned int group_desc; unsigned int offset; + ext4_group_t ngroups = ext4_get_groups_count(sb); struct ext4_group_desc *desc; struct ext4_sb_info *sbi = EXT4_SB(sb); - if (block_group >= sbi->s_groups_count) { + if (block_group >= ngroups) { ext4_error(sb, "ext4_get_group_desc", "block_group >= groups_count - " "block_group = %u, groups_count = %u", - block_group, sbi->s_groups_count); + block_group, ngroups); return NULL; } - smp_rmb(); group_desc = block_group >> EXT4_DESC_PER_BLOCK_BITS(sb); offset = block_group & (EXT4_DESC_PER_BLOCK(sb) - 1); @@ -326,16 +326,16 @@ ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group) unlock_buffer(bh); return bh; } - spin_lock(sb_bgl_lock(EXT4_SB(sb), block_group)); + ext4_lock_group(sb, block_group); if (desc->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) { ext4_init_block_bitmap(sb, bh, block_group, desc); set_bitmap_uptodate(bh); set_buffer_uptodate(bh); - spin_unlock(sb_bgl_lock(EXT4_SB(sb), block_group)); + ext4_unlock_group(sb, block_group); unlock_buffer(bh); return bh; } - spin_unlock(sb_bgl_lock(EXT4_SB(sb), block_group)); + ext4_unlock_group(sb, block_group); if (buffer_uptodate(bh)) { /* * if not uninit if bh is uptodate, @@ -451,7 +451,7 @@ void ext4_add_groupblocks(handle_t *handle, struct super_block *sb, down_write(&grp->alloc_sem); for (i = 0, blocks_freed = 0; i < count; i++) { BUFFER_TRACE(bitmap_bh, "clear bit"); - if (!ext4_clear_bit_atomic(sb_bgl_lock(sbi, block_group), + if (!ext4_clear_bit_atomic(ext4_group_lock_ptr(sb, block_group), bit + i, bitmap_bh->b_data)) { ext4_error(sb, __func__, "bit already cleared for block %llu", @@ -461,11 +461,11 @@ void ext4_add_groupblocks(handle_t *handle, struct super_block *sb, blocks_freed++; } } - spin_lock(sb_bgl_lock(sbi, block_group)); + ext4_lock_group(sb, block_group); blk_free_count = blocks_freed + ext4_free_blks_count(sb, desc); ext4_free_blks_set(sb, desc, blk_free_count); desc->bg_checksum = ext4_group_desc_csum(sbi, block_group, desc); - spin_unlock(sb_bgl_lock(sbi, block_group)); + ext4_unlock_group(sb, block_group); percpu_counter_add(&sbi->s_freeblocks_counter, blocks_freed); if (sbi->s_log_groups_per_flex) { @@ -665,7 +665,7 @@ ext4_fsblk_t ext4_count_free_blocks(struct super_block *sb) ext4_fsblk_t desc_count; struct ext4_group_desc *gdp; ext4_group_t i; - ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; + ext4_group_t ngroups = ext4_get_groups_count(sb); #ifdef EXT4FS_DEBUG struct ext4_super_block *es; ext4_fsblk_t bitmap_count; @@ -677,7 +677,6 @@ ext4_fsblk_t ext4_count_free_blocks(struct super_block *sb) bitmap_count = 0; gdp = NULL; - smp_rmb(); for (i = 0; i < ngroups; i++) { gdp = ext4_get_group_desc(sb, i, NULL); if (!gdp) @@ -700,7 +699,6 @@ ext4_fsblk_t ext4_count_free_blocks(struct super_block *sb) return bitmap_count; #else desc_count = 0; - smp_rmb(); for (i = 0; i < ngroups; i++) { gdp = ext4_get_group_desc(sb, i, NULL); if (!gdp) diff --git a/fs/ext4/block_validity.c b/fs/ext4/block_validity.c new file mode 100644 index 000000000000..50784ef07563 --- /dev/null +++ b/fs/ext4/block_validity.c @@ -0,0 +1,244 @@ +/* + * linux/fs/ext4/block_validity.c + * + * Copyright (C) 2009 + * Theodore Ts'o (tytso@mit.edu) + * + * Track which blocks in the filesystem are metadata blocks that + * should never be used as data blocks by files or directories. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "ext4.h" + +struct ext4_system_zone { + struct rb_node node; + ext4_fsblk_t start_blk; + unsigned int count; +}; + +static struct kmem_cache *ext4_system_zone_cachep; + +int __init init_ext4_system_zone(void) +{ + ext4_system_zone_cachep = KMEM_CACHE(ext4_system_zone, + SLAB_RECLAIM_ACCOUNT); + if (ext4_system_zone_cachep == NULL) + return -ENOMEM; + return 0; +} + +void exit_ext4_system_zone(void) +{ + kmem_cache_destroy(ext4_system_zone_cachep); +} + +static inline int can_merge(struct ext4_system_zone *entry1, + struct ext4_system_zone *entry2) +{ + if ((entry1->start_blk + entry1->count) == entry2->start_blk) + return 1; + return 0; +} + +/* + * Mark a range of blocks as belonging to the "system zone" --- that + * is, filesystem metadata blocks which should never be used by + * inodes. + */ +static int add_system_zone(struct ext4_sb_info *sbi, + ext4_fsblk_t start_blk, + unsigned int count) +{ + struct ext4_system_zone *new_entry = NULL, *entry; + struct rb_node **n = &sbi->system_blks.rb_node, *node; + struct rb_node *parent = NULL, *new_node = NULL; + + while (*n) { + parent = *n; + entry = rb_entry(parent, struct ext4_system_zone, node); + if (start_blk < entry->start_blk) + n = &(*n)->rb_left; + else if (start_blk >= (entry->start_blk + entry->count)) + n = &(*n)->rb_right; + else { + if (start_blk + count > (entry->start_blk + + entry->count)) + entry->count = (start_blk + count - + entry->start_blk); + new_node = *n; + new_entry = rb_entry(new_node, struct ext4_system_zone, + node); + break; + } + } + + if (!new_entry) { + new_entry = kmem_cache_alloc(ext4_system_zone_cachep, + GFP_KERNEL); + if (!new_entry) + return -ENOMEM; + new_entry->start_blk = start_blk; + new_entry->count = count; + new_node = &new_entry->node; + + rb_link_node(new_node, parent, n); + rb_insert_color(new_node, &sbi->system_blks); + } + + /* Can we merge to the left? */ + node = rb_prev(new_node); + if (node) { + entry = rb_entry(node, struct ext4_system_zone, node); + if (can_merge(entry, new_entry)) { + new_entry->start_blk = entry->start_blk; + new_entry->count += entry->count; + rb_erase(node, &sbi->system_blks); + kmem_cache_free(ext4_system_zone_cachep, entry); + } + } + + /* Can we merge to the right? */ + node = rb_next(new_node); + if (node) { + entry = rb_entry(node, struct ext4_system_zone, node); + if (can_merge(new_entry, entry)) { + new_entry->count += entry->count; + rb_erase(node, &sbi->system_blks); + kmem_cache_free(ext4_system_zone_cachep, entry); + } + } + return 0; +} + +static void debug_print_tree(struct ext4_sb_info *sbi) +{ + struct rb_node *node; + struct ext4_system_zone *entry; + int first = 1; + + printk(KERN_INFO "System zones: "); + node = rb_first(&sbi->system_blks); + while (node) { + entry = rb_entry(node, struct ext4_system_zone, node); + printk("%s%llu-%llu", first ? "" : ", ", + entry->start_blk, entry->start_blk + entry->count - 1); + first = 0; + node = rb_next(node); + } + printk("\n"); +} + +int ext4_setup_system_zone(struct super_block *sb) +{ + ext4_group_t ngroups = ext4_get_groups_count(sb); + struct ext4_sb_info *sbi = EXT4_SB(sb); + struct ext4_group_desc *gdp; + ext4_group_t i; + int flex_size = ext4_flex_bg_size(sbi); + int ret; + + if (!test_opt(sb, BLOCK_VALIDITY)) { + if (EXT4_SB(sb)->system_blks.rb_node) + ext4_release_system_zone(sb); + return 0; + } + if (EXT4_SB(sb)->system_blks.rb_node) + return 0; + + for (i=0; i < ngroups; i++) { + if (ext4_bg_has_super(sb, i) && + ((i < 5) || ((i % flex_size) == 0))) + add_system_zone(sbi, ext4_group_first_block_no(sb, i), + sbi->s_gdb_count + 1); + gdp = ext4_get_group_desc(sb, i, NULL); + ret = add_system_zone(sbi, ext4_block_bitmap(sb, gdp), 1); + if (ret) + return ret; + ret = add_system_zone(sbi, ext4_inode_bitmap(sb, gdp), 1); + if (ret) + return ret; + ret = add_system_zone(sbi, ext4_inode_table(sb, gdp), + sbi->s_itb_per_group); + if (ret) + return ret; + } + + if (test_opt(sb, DEBUG)) + debug_print_tree(EXT4_SB(sb)); + return 0; +} + +/* Called when the filesystem is unmounted */ +void ext4_release_system_zone(struct super_block *sb) +{ + struct rb_node *n = EXT4_SB(sb)->system_blks.rb_node; + struct rb_node *parent; + struct ext4_system_zone *entry; + + while (n) { + /* Do the node's children first */ + if (n->rb_left) { + n = n->rb_left; + continue; + } + if (n->rb_right) { + n = n->rb_right; + continue; + } + /* + * The node has no children; free it, and then zero + * out parent's link to it. Finally go to the + * beginning of the loop and try to free the parent + * node. + */ + parent = rb_parent(n); + entry = rb_entry(n, struct ext4_system_zone, node); + kmem_cache_free(ext4_system_zone_cachep, entry); + if (!parent) + EXT4_SB(sb)->system_blks.rb_node = NULL; + else if (parent->rb_left == n) + parent->rb_left = NULL; + else if (parent->rb_right == n) + parent->rb_right = NULL; + n = parent; + } + EXT4_SB(sb)->system_blks.rb_node = NULL; +} + +/* + * Returns 1 if the passed-in block region (start_blk, + * start_blk+count) is valid; 0 if some part of the block region + * overlaps with filesystem metadata blocks. + */ +int ext4_data_block_valid(struct ext4_sb_info *sbi, ext4_fsblk_t start_blk, + unsigned int count) +{ + struct ext4_system_zone *entry; + struct rb_node *n = sbi->system_blks.rb_node; + + if ((start_blk <= le32_to_cpu(sbi->s_es->s_first_data_block)) || + (start_blk + count > ext4_blocks_count(sbi->s_es))) + return 0; + while (n) { + entry = rb_entry(n, struct ext4_system_zone, node); + if (start_blk + count - 1 < entry->start_blk) + n = n->rb_left; + else if (start_blk >= (entry->start_blk + entry->count)) + n = n->rb_right; + else + return 0; + } + return 1; +} + diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c index b64789929a65..9dc93168e262 100644 --- a/fs/ext4/dir.c +++ b/fs/ext4/dir.c @@ -131,8 +131,7 @@ static int ext4_readdir(struct file *filp, struct buffer_head *bh = NULL; map_bh.b_state = 0; - err = ext4_get_blocks_wrap(NULL, inode, blk, 1, &map_bh, - 0, 0, 0); + err = ext4_get_blocks(NULL, inode, blk, 1, &map_bh, 0); if (err > 0) { pgoff_t index = map_bh.b_blocknr >> (PAGE_CACHE_SHIFT - inode->i_blkbits); diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index d0f15ef56de1..cc7d5edc38c9 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -21,7 +21,14 @@ #include #include #include -#include "ext4_i.h" +#include +#include +#include +#include +#include +#include +#include +#include /* * The fourth extended filesystem constants/structures @@ -46,6 +53,19 @@ #define ext4_debug(f, a...) do {} while (0) #endif +/* data type for block offset of block group */ +typedef int ext4_grpblk_t; + +/* data type for filesystem-wide blocks number */ +typedef unsigned long long ext4_fsblk_t; + +/* data type for file logical block number */ +typedef __u32 ext4_lblk_t; + +/* data type for block group number */ +typedef unsigned int ext4_group_t; + + /* prefer goal again. length */ #define EXT4_MB_HINT_MERGE 1 /* blocks already reserved */ @@ -179,9 +199,6 @@ struct flex_groups { #define EXT4_BG_BLOCK_UNINIT 0x0002 /* Block bitmap not in use */ #define EXT4_BG_INODE_ZEROED 0x0004 /* On-disk itable initialized to zero */ -#ifdef __KERNEL__ -#include "ext4_sb.h" -#endif /* * Macro-instructions used to manage group descriptors */ @@ -297,10 +314,23 @@ struct ext4_new_group_data { }; /* - * Following is used by preallocation code to tell get_blocks() that we - * want uninitialzed extents. + * Flags used by ext4_get_blocks() */ -#define EXT4_CREATE_UNINITIALIZED_EXT 2 + /* Allocate any needed blocks and/or convert an unitialized + extent to be an initialized ext4 */ +#define EXT4_GET_BLOCKS_CREATE 0x0001 + /* Request the creation of an unitialized extent */ +#define EXT4_GET_BLOCKS_UNINIT_EXT 0x0002 +#define EXT4_GET_BLOCKS_CREATE_UNINIT_EXT (EXT4_GET_BLOCKS_UNINIT_EXT|\ + EXT4_GET_BLOCKS_CREATE) + /* Caller is from the delayed allocation writeout path, + so set the magic i_delalloc_reserve_flag after taking the + inode allocation semaphore for */ +#define EXT4_GET_BLOCKS_DELALLOC_RESERVE 0x0004 + /* Call ext4_da_update_reserve_space() after successfully + allocating the blocks */ +#define EXT4_GET_BLOCKS_UPDATE_RESERVE_SPACE 0x0008 + /* * ioctl commands @@ -515,6 +545,110 @@ do { \ #endif /* defined(__KERNEL__) || defined(__linux__) */ +/* + * storage for cached extent + */ +struct ext4_ext_cache { + ext4_fsblk_t ec_start; + ext4_lblk_t ec_block; + __u32 ec_len; /* must be 32bit to return holes */ + __u32 ec_type; +}; + +/* + * fourth extended file system inode data in memory + */ +struct ext4_inode_info { + __le32 i_data[15]; /* unconverted */ + __u32 i_flags; + ext4_fsblk_t i_file_acl; + __u32 i_dtime; + + /* + * i_block_group is the number of the block group which contains + * this file's inode. Constant across the lifetime of the inode, + * it is ued for making block allocation decisions - we try to + * place a file's data blocks near its inode block, and new inodes + * near to their parent directory's inode. + */ + ext4_group_t i_block_group; + __u32 i_state; /* Dynamic state flags for ext4 */ + + ext4_lblk_t i_dir_start_lookup; +#ifdef CONFIG_EXT4_FS_XATTR + /* + * Extended attributes can be read independently of the main file + * data. Taking i_mutex even when reading would cause contention + * between readers of EAs and writers of regular file data, so + * instead we synchronize on xattr_sem when reading or changing + * EAs. + */ + struct rw_semaphore xattr_sem; +#endif +#ifdef CONFIG_EXT4_FS_POSIX_ACL + struct posix_acl *i_acl; + struct posix_acl *i_default_acl; +#endif + + struct list_head i_orphan; /* unlinked but open inodes */ + + /* + * i_disksize keeps track of what the inode size is ON DISK, not + * in memory. During truncate, i_size is set to the new size by + * the VFS prior to calling ext4_truncate(), but the filesystem won't + * set i_disksize to 0 until the truncate is actually under way. + * + * The intent is that i_disksize always represents the blocks which + * are used by this file. This allows recovery to restart truncate + * on orphans if we crash during truncate. We actually write i_disksize + * into the on-disk inode when writing inodes out, instead of i_size. + * + * The only time when i_disksize and i_size may be different is when + * a truncate is in progress. The only things which change i_disksize + * are ext4_get_block (growth) and ext4_truncate (shrinkth). + */ + loff_t i_disksize; + + /* + * i_data_sem is for serialising ext4_truncate() against + * ext4_getblock(). In the 2.4 ext2 design, great chunks of inode's + * data tree are chopped off during truncate. We can't do that in + * ext4 because whenever we perform intermediate commits during + * truncate, the inode and all the metadata blocks *must* be in a + * consistent state which allows truncation of the orphans to restart + * during recovery. Hence we must fix the get_block-vs-truncate race + * by other means, so we have i_data_sem. + */ + struct rw_semaphore i_data_sem; + struct inode vfs_inode; + struct jbd2_inode jinode; + + struct ext4_ext_cache i_cached_extent; + /* + * File creation time. Its function is same as that of + * struct timespec i_{a,c,m}time in the generic inode. + */ + struct timespec i_crtime; + + /* mballoc */ + struct list_head i_prealloc_list; + spinlock_t i_prealloc_lock; + + /* ialloc */ + ext4_group_t i_last_alloc_group; + + /* allocation reservation info for delalloc */ + unsigned int i_reserved_data_blocks; + unsigned int i_reserved_meta_blocks; + unsigned int i_allocated_meta_blocks; + unsigned short i_delalloc_reserved_flag; + + /* on-disk additional length */ + __u16 i_extra_isize; + + spinlock_t i_block_reservation_lock; +}; + /* * File system states */ @@ -560,6 +694,7 @@ do { \ #define EXT4_MOUNT_I_VERSION 0x2000000 /* i_version support */ #define EXT4_MOUNT_DELALLOC 0x8000000 /* Delalloc support */ #define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000 /* Abort on file data write */ +#define EXT4_MOUNT_BLOCK_VALIDITY 0x20000000 /* Block validity checking */ /* Compatibility, for having both ext2_fs.h and ext4_fs.h included at once */ #ifndef _LINUX_EXT2_FS_H @@ -689,6 +824,137 @@ struct ext4_super_block { }; #ifdef __KERNEL__ +/* + * fourth extended-fs super-block data in memory + */ +struct ext4_sb_info { + unsigned long s_desc_size; /* Size of a group descriptor in bytes */ + unsigned long s_inodes_per_block;/* Number of inodes per block */ + unsigned long s_blocks_per_group;/* Number of blocks in a group */ + unsigned long s_inodes_per_group;/* Number of inodes in a group */ + unsigned long s_itb_per_group; /* Number of inode table blocks per group */ + unsigned long s_gdb_count; /* Number of group descriptor blocks */ + unsigned long s_desc_per_block; /* Number of group descriptors per block */ + ext4_group_t s_groups_count; /* Number of groups in the fs */ + unsigned long s_overhead_last; /* Last calculated overhead */ + unsigned long s_blocks_last; /* Last seen block count */ + loff_t s_bitmap_maxbytes; /* max bytes for bitmap files */ + struct buffer_head * s_sbh; /* Buffer containing the super block */ + struct ext4_super_block *s_es; /* Pointer to the super block in the buffer */ + struct buffer_head **s_group_desc; + unsigned long s_mount_opt; + ext4_fsblk_t s_sb_block; + uid_t s_resuid; + gid_t s_resgid; + unsigned short s_mount_state; + unsigned short s_pad; + int s_addr_per_block_bits; + int s_desc_per_block_bits; + int s_inode_size; + int s_first_ino; + unsigned int s_inode_readahead_blks; + spinlock_t s_next_gen_lock; + u32 s_next_generation; + u32 s_hash_seed[4]; + int s_def_hash_version; + int s_hash_unsigned; /* 3 if hash should be signed, 0 if not */ + struct percpu_counter s_freeblocks_counter; + struct percpu_counter s_freeinodes_counter; + struct percpu_counter s_dirs_counter; + struct percpu_counter s_dirtyblocks_counter; + struct blockgroup_lock *s_blockgroup_lock; + struct proc_dir_entry *s_proc; + struct kobject s_kobj; + struct completion s_kobj_unregister; + + /* Journaling */ + struct inode *s_journal_inode; + struct journal_s *s_journal; + struct list_head s_orphan; + struct mutex s_orphan_lock; + struct mutex s_resize_lock; + unsigned long s_commit_interval; + u32 s_max_batch_time; + u32 s_min_batch_time; + struct block_device *journal_bdev; +#ifdef CONFIG_JBD2_DEBUG + struct timer_list turn_ro_timer; /* For turning read-only (crash simulation) */ + wait_queue_head_t ro_wait_queue; /* For people waiting for the fs to go read-only */ +#endif +#ifdef CONFIG_QUOTA + char *s_qf_names[MAXQUOTAS]; /* Names of quota files with journalled quota */ + int s_jquota_fmt; /* Format of quota to use */ +#endif + unsigned int s_want_extra_isize; /* New inodes should reserve # bytes */ + struct rb_root system_blks; + +#ifdef EXTENTS_STATS + /* ext4 extents stats */ + unsigned long s_ext_min; + unsigned long s_ext_max; + unsigned long s_depth_max; + spinlock_t s_ext_stats_lock; + unsigned long s_ext_blocks; + unsigned long s_ext_extents; +#endif + + /* for buddy allocator */ + struct ext4_group_info ***s_group_info; + struct inode *s_buddy_cache; + long s_blocks_reserved; + spinlock_t s_reserve_lock; + spinlock_t s_md_lock; + tid_t s_last_transaction; + unsigned short *s_mb_offsets; + unsigned int *s_mb_maxs; + + /* tunables */ + unsigned long s_stripe; + unsigned int s_mb_stream_request; + unsigned int s_mb_max_to_scan; + unsigned int s_mb_min_to_scan; + unsigned int s_mb_stats; + unsigned int s_mb_order2_reqs; + unsigned int s_mb_group_prealloc; + /* where last allocation was done - for stream allocation */ + unsigned long s_mb_last_group; + unsigned long s_mb_last_start; + + /* history to debug policy */ + struct ext4_mb_history *s_mb_history; + int s_mb_history_cur; + int s_mb_history_max; + int s_mb_history_num; + spinlock_t s_mb_history_lock; + int s_mb_history_filter; + + /* stats for buddy allocator */ + spinlock_t s_mb_pa_lock; + atomic_t s_bal_reqs; /* number of reqs with len > 1 */ + atomic_t s_bal_success; /* we found long enough chunks */ + atomic_t s_bal_allocated; /* in blocks */ + atomic_t s_bal_ex_scanned; /* total extents scanned */ + atomic_t s_bal_goals; /* goal hits */ + atomic_t s_bal_breaks; /* too long searches */ + atomic_t s_bal_2orders; /* 2^order hits */ + spinlock_t s_bal_lock; + unsigned long s_mb_buddies_generated; + unsigned long long s_mb_generation_time; + atomic_t s_mb_lost_chunks; + atomic_t s_mb_preallocated; + atomic_t s_mb_discarded; + + /* locality groups */ + struct ext4_locality_group *s_locality_groups; + + /* for write statistics */ + unsigned long s_sectors_written_start; + u64 s_kbytes_written; + + unsigned int s_log_groups_per_flex; + struct flex_groups *s_flex_groups; +}; + static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb) { return sb->s_fs_info; @@ -704,7 +970,6 @@ static inline struct timespec ext4_current_time(struct inode *inode) current_fs_time(inode->i_sb) : CURRENT_TIME_SEC; } - static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino) { return ino == EXT4_ROOT_INO || @@ -1014,6 +1279,14 @@ extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb, ext4_group_t block_group, struct buffer_head ** bh); extern int ext4_should_retry_alloc(struct super_block *sb, int *retries); +struct buffer_head *ext4_read_block_bitmap(struct super_block *sb, + ext4_group_t block_group); +extern unsigned ext4_init_block_bitmap(struct super_block *sb, + struct buffer_head *bh, + ext4_group_t group, + struct ext4_group_desc *desc); +#define ext4_free_blocks_after_init(sb, group, desc) \ + ext4_init_block_bitmap(sb, NULL, group, desc) /* dir.c */ extern int ext4_check_dir_entry(const char *, struct inode *, @@ -1038,6 +1311,11 @@ extern struct inode * ext4_orphan_get(struct super_block *, unsigned long); extern unsigned long ext4_count_free_inodes(struct super_block *); extern unsigned long ext4_count_dirs(struct super_block *); extern void ext4_check_inodes_bitmap(struct super_block *); +extern unsigned ext4_init_inode_bitmap(struct super_block *sb, + struct buffer_head *bh, + ext4_group_t group, + struct ext4_group_desc *desc); +extern void mark_bitmap_end(int start_bit, int end_bit, char *bitmap); /* mballoc.c */ extern long ext4_mb_stats; @@ -1123,6 +1401,8 @@ extern void ext4_abort(struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4))); extern void ext4_warning(struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4))); +extern void ext4_msg(struct super_block *, const char *, const char *, ...) + __attribute__ ((format (printf, 3, 4))); extern void ext4_grp_locked_error(struct super_block *, ext4_group_t, const char *, const char *, ...) __attribute__ ((format (printf, 4, 5))); @@ -1161,6 +1441,10 @@ extern void ext4_used_dirs_set(struct super_block *sb, struct ext4_group_desc *bg, __u32 count); extern void ext4_itable_unused_set(struct super_block *sb, struct ext4_group_desc *bg, __u32 count); +extern __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 group, + struct ext4_group_desc *gdp); +extern int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 group, + struct ext4_group_desc *gdp); static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es) { @@ -1228,6 +1512,18 @@ struct ext4_group_info *ext4_get_group_info(struct super_block *sb, return grp_info[indexv][indexh]; } +/* + * Reading s_groups_count requires using smp_rmb() afterwards. See + * the locking protocol documented in the comments of ext4_group_add() + * in resize.c + */ +static inline ext4_group_t ext4_get_groups_count(struct super_block *sb) +{ + ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; + + smp_rmb(); + return ngroups; +} static inline ext4_group_t ext4_flex_group(struct ext4_sb_info *sbi, ext4_group_t block_group) @@ -1283,33 +1579,25 @@ struct ext4_group_info { }; #define EXT4_GROUP_INFO_NEED_INIT_BIT 0 -#define EXT4_GROUP_INFO_LOCKED_BIT 1 #define EXT4_MB_GRP_NEED_INIT(grp) \ (test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state))) +static inline spinlock_t *ext4_group_lock_ptr(struct super_block *sb, + ext4_group_t group) +{ + return bgl_lock_ptr(EXT4_SB(sb)->s_blockgroup_lock, group); +} + static inline void ext4_lock_group(struct super_block *sb, ext4_group_t group) { - struct ext4_group_info *grinfo = ext4_get_group_info(sb, group); - - bit_spin_lock(EXT4_GROUP_INFO_LOCKED_BIT, &(grinfo->bb_state)); + spin_lock(ext4_group_lock_ptr(sb, group)); } static inline void ext4_unlock_group(struct super_block *sb, ext4_group_t group) { - struct ext4_group_info *grinfo = ext4_get_group_info(sb, group); - - bit_spin_unlock(EXT4_GROUP_INFO_LOCKED_BIT, &(grinfo->bb_state)); -} - -static inline int ext4_is_group_locked(struct super_block *sb, - ext4_group_t group) -{ - struct ext4_group_info *grinfo = ext4_get_group_info(sb, group); - - return bit_spin_is_locked(EXT4_GROUP_INFO_LOCKED_BIT, - &(grinfo->bb_state)); + spin_unlock(ext4_group_lock_ptr(sb, group)); } /* @@ -1326,11 +1614,21 @@ extern const struct file_operations ext4_file_operations; /* namei.c */ extern const struct inode_operations ext4_dir_inode_operations; extern const struct inode_operations ext4_special_inode_operations; +extern struct dentry *ext4_get_parent(struct dentry *child); /* symlink.c */ extern const struct inode_operations ext4_symlink_inode_operations; extern const struct inode_operations ext4_fast_symlink_inode_operations; +/* block_validity */ +extern void ext4_release_system_zone(struct super_block *sb); +extern int ext4_setup_system_zone(struct super_block *sb); +extern int __init init_ext4_system_zone(void); +extern void exit_ext4_system_zone(void); +extern int ext4_data_block_valid(struct ext4_sb_info *sbi, + ext4_fsblk_t start_blk, + unsigned int count); + /* extents.c */ extern int ext4_ext_tree_init(handle_t *handle, struct inode *); extern int ext4_ext_writepage_trans_blocks(struct inode *, int); @@ -1338,17 +1636,15 @@ extern int ext4_ext_index_trans_blocks(struct inode *inode, int nrblocks, int chunk); extern int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, ext4_lblk_t iblock, unsigned int max_blocks, - struct buffer_head *bh_result, - int create, int extend_disksize); + struct buffer_head *bh_result, int flags); extern void ext4_ext_truncate(struct inode *); extern void ext4_ext_init(struct super_block *); extern void ext4_ext_release(struct super_block *); extern long ext4_fallocate(struct inode *inode, int mode, loff_t offset, loff_t len); -extern int ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, - sector_t block, unsigned int max_blocks, - struct buffer_head *bh, int create, - int extend_disksize, int flag); +extern int ext4_get_blocks(handle_t *handle, struct inode *inode, + sector_t block, unsigned int max_blocks, + struct buffer_head *bh, int flags); extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, __u64 start, __u64 len); diff --git a/fs/ext4/ext4_i.h b/fs/ext4/ext4_i.h deleted file mode 100644 index 4ce2187123aa..000000000000 --- a/fs/ext4/ext4_i.h +++ /dev/null @@ -1,140 +0,0 @@ -/* - * ext4_i.h - * - * Copyright (C) 1992, 1993, 1994, 1995 - * Remy Card (card@masi.ibp.fr) - * Laboratoire MASI - Institut Blaise Pascal - * Universite Pierre et Marie Curie (Paris VI) - * - * from - * - * linux/include/linux/minix_fs_i.h - * - * Copyright (C) 1991, 1992 Linus Torvalds - */ - -#ifndef _EXT4_I -#define _EXT4_I - -#include -#include -#include -#include - -/* data type for block offset of block group */ -typedef int ext4_grpblk_t; - -/* data type for filesystem-wide blocks number */ -typedef unsigned long long ext4_fsblk_t; - -/* data type for file logical block number */ -typedef __u32 ext4_lblk_t; - -/* data type for block group number */ -typedef unsigned int ext4_group_t; - -/* - * storage for cached extent - */ -struct ext4_ext_cache { - ext4_fsblk_t ec_start; - ext4_lblk_t ec_block; - __u32 ec_len; /* must be 32bit to return holes */ - __u32 ec_type; -}; - -/* - * fourth extended file system inode data in memory - */ -struct ext4_inode_info { - __le32 i_data[15]; /* unconverted */ - __u32 i_flags; - ext4_fsblk_t i_file_acl; - __u32 i_dtime; - - /* - * i_block_group is the number of the block group which contains - * this file's inode. Constant across the lifetime of the inode, - * it is ued for making block allocation decisions - we try to - * place a file's data blocks near its inode block, and new inodes - * near to their parent directory's inode. - */ - ext4_group_t i_block_group; - __u32 i_state; /* Dynamic state flags for ext4 */ - - ext4_lblk_t i_dir_start_lookup; -#ifdef CONFIG_EXT4_FS_XATTR - /* - * Extended attributes can be read independently of the main file - * data. Taking i_mutex even when reading would cause contention - * between readers of EAs and writers of regular file data, so - * instead we synchronize on xattr_sem when reading or changing - * EAs. - */ - struct rw_semaphore xattr_sem; -#endif -#ifdef CONFIG_EXT4_FS_POSIX_ACL - struct posix_acl *i_acl; - struct posix_acl *i_default_acl; -#endif - - struct list_head i_orphan; /* unlinked but open inodes */ - - /* - * i_disksize keeps track of what the inode size is ON DISK, not - * in memory. During truncate, i_size is set to the new size by - * the VFS prior to calling ext4_truncate(), but the filesystem won't - * set i_disksize to 0 until the truncate is actually under way. - * - * The intent is that i_disksize always represents the blocks which - * are used by this file. This allows recovery to restart truncate - * on orphans if we crash during truncate. We actually write i_disksize - * into the on-disk inode when writing inodes out, instead of i_size. - * - * The only time when i_disksize and i_size may be different is when - * a truncate is in progress. The only things which change i_disksize - * are ext4_get_block (growth) and ext4_truncate (shrinkth). - */ - loff_t i_disksize; - - /* - * i_data_sem is for serialising ext4_truncate() against - * ext4_getblock(). In the 2.4 ext2 design, great chunks of inode's - * data tree are chopped off during truncate. We can't do that in - * ext4 because whenever we perform intermediate commits during - * truncate, the inode and all the metadata blocks *must* be in a - * consistent state which allows truncation of the orphans to restart - * during recovery. Hence we must fix the get_block-vs-truncate race - * by other means, so we have i_data_sem. - */ - struct rw_semaphore i_data_sem; - struct inode vfs_inode; - struct jbd2_inode jinode; - - struct ext4_ext_cache i_cached_extent; - /* - * File creation time. Its function is same as that of - * struct timespec i_{a,c,m}time in the generic inode. - */ - struct timespec i_crtime; - - /* mballoc */ - struct list_head i_prealloc_list; - spinlock_t i_prealloc_lock; - - /* ialloc */ - ext4_group_t i_last_alloc_group; - - /* allocation reservation info for delalloc */ - unsigned int i_reserved_data_blocks; - unsigned int i_reserved_meta_blocks; - unsigned int i_allocated_meta_blocks; - unsigned short i_delalloc_reserved_flag; - - /* on-disk additional length */ - __u16 i_extra_isize; - - spinlock_t i_block_reservation_lock; -}; - -#endif /* _EXT4_I */ diff --git a/fs/ext4/ext4_sb.h b/fs/ext4/ext4_sb.h deleted file mode 100644 index 57b71fefbccf..000000000000 --- a/fs/ext4/ext4_sb.h +++ /dev/null @@ -1,161 +0,0 @@ -/* - * ext4_sb.h - * - * Copyright (C) 1992, 1993, 1994, 1995 - * Remy Card (card@masi.ibp.fr) - * Laboratoire MASI - Institut Blaise Pascal - * Universite Pierre et Marie Curie (Paris VI) - * - * from - * - * linux/include/linux/minix_fs_sb.h - * - * Copyright (C) 1991, 1992 Linus Torvalds - */ - -#ifndef _EXT4_SB -#define _EXT4_SB - -#ifdef __KERNEL__ -#include -#include -#include -#include -#endif -#include - -/* - * fourth extended-fs super-block data in memory - */ -struct ext4_sb_info { - unsigned long s_desc_size; /* Size of a group descriptor in bytes */ - unsigned long s_inodes_per_block;/* Number of inodes per block */ - unsigned long s_blocks_per_group;/* Number of blocks in a group */ - unsigned long s_inodes_per_group;/* Number of inodes in a group */ - unsigned long s_itb_per_group; /* Number of inode table blocks per group */ - unsigned long s_gdb_count; /* Number of group descriptor blocks */ - unsigned long s_desc_per_block; /* Number of group descriptors per block */ - ext4_group_t s_groups_count; /* Number of groups in the fs */ - unsigned long s_overhead_last; /* Last calculated overhead */ - unsigned long s_blocks_last; /* Last seen block count */ - loff_t s_bitmap_maxbytes; /* max bytes for bitmap files */ - struct buffer_head * s_sbh; /* Buffer containing the super block */ - struct ext4_super_block *s_es; /* Pointer to the super block in the buffer */ - struct buffer_head **s_group_desc; - unsigned long s_mount_opt; - ext4_fsblk_t s_sb_block; - uid_t s_resuid; - gid_t s_resgid; - unsigned short s_mount_state; - unsigned short s_pad; - int s_addr_per_block_bits; - int s_desc_per_block_bits; - int s_inode_size; - int s_first_ino; - unsigned int s_inode_readahead_blks; - spinlock_t s_next_gen_lock; - u32 s_next_generation; - u32 s_hash_seed[4]; - int s_def_hash_version; - int s_hash_unsigned; /* 3 if hash should be signed, 0 if not */ - struct percpu_counter s_freeblocks_counter; - struct percpu_counter s_freeinodes_counter; - struct percpu_counter s_dirs_counter; - struct percpu_counter s_dirtyblocks_counter; - struct blockgroup_lock *s_blockgroup_lock; - struct proc_dir_entry *s_proc; - struct kobject s_kobj; - struct completion s_kobj_unregister; - - /* Journaling */ - struct inode *s_journal_inode; - struct journal_s *s_journal; - struct list_head s_orphan; - unsigned long s_commit_interval; - u32 s_max_batch_time; - u32 s_min_batch_time; - struct block_device *journal_bdev; -#ifdef CONFIG_JBD2_DEBUG - struct timer_list turn_ro_timer; /* For turning read-only (crash simulation) */ - wait_queue_head_t ro_wait_queue; /* For people waiting for the fs to go read-only */ -#endif -#ifdef CONFIG_QUOTA - char *s_qf_names[MAXQUOTAS]; /* Names of quota files with journalled quota */ - int s_jquota_fmt; /* Format of quota to use */ -#endif - unsigned int s_want_extra_isize; /* New inodes should reserve # bytes */ - -#ifdef EXTENTS_STATS - /* ext4 extents stats */ - unsigned long s_ext_min; - unsigned long s_ext_max; - unsigned long s_depth_max; - spinlock_t s_ext_stats_lock; - unsigned long s_ext_blocks; - unsigned long s_ext_extents; -#endif - - /* for buddy allocator */ - struct ext4_group_info ***s_group_info; - struct inode *s_buddy_cache; - long s_blocks_reserved; - spinlock_t s_reserve_lock; - spinlock_t s_md_lock; - tid_t s_last_transaction; - unsigned short *s_mb_offsets; - unsigned int *s_mb_maxs; - - /* tunables */ - unsigned long s_stripe; - unsigned int s_mb_stream_request; - unsigned int s_mb_max_to_scan; - unsigned int s_mb_min_to_scan; - unsigned int s_mb_stats; - unsigned int s_mb_order2_reqs; - unsigned int s_mb_group_prealloc; - /* where last allocation was done - for stream allocation */ - unsigned long s_mb_last_group; - unsigned long s_mb_last_start; - - /* history to debug policy */ - struct ext4_mb_history *s_mb_history; - int s_mb_history_cur; - int s_mb_history_max; - int s_mb_history_num; - spinlock_t s_mb_history_lock; - int s_mb_history_filter; - - /* stats for buddy allocator */ - spinlock_t s_mb_pa_lock; - atomic_t s_bal_reqs; /* number of reqs with len > 1 */ - atomic_t s_bal_success; /* we found long enough chunks */ - atomic_t s_bal_allocated; /* in blocks */ - atomic_t s_bal_ex_scanned; /* total extents scanned */ - atomic_t s_bal_goals; /* goal hits */ - atomic_t s_bal_breaks; /* too long searches */ - atomic_t s_bal_2orders; /* 2^order hits */ - spinlock_t s_bal_lock; - unsigned long s_mb_buddies_generated; - unsigned long long s_mb_generation_time; - atomic_t s_mb_lost_chunks; - atomic_t s_mb_preallocated; - atomic_t s_mb_discarded; - - /* locality groups */ - struct ext4_locality_group *s_locality_groups; - - /* for write statistics */ - unsigned long s_sectors_written_start; - u64 s_kbytes_written; - - unsigned int s_log_groups_per_flex; - struct flex_groups *s_flex_groups; -}; - -static inline spinlock_t * -sb_bgl_lock(struct ext4_sb_info *sbi, unsigned int block_group) -{ - return bgl_lock_ptr(sbi->s_blockgroup_lock, block_group); -} - -#endif /* _EXT4_SB */ diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index e3a55eb8b26a..2593f748c3a4 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -326,32 +326,18 @@ ext4_ext_max_entries(struct inode *inode, int depth) static int ext4_valid_extent(struct inode *inode, struct ext4_extent *ext) { - ext4_fsblk_t block = ext_pblock(ext), valid_block; + ext4_fsblk_t block = ext_pblock(ext); int len = ext4_ext_get_actual_len(ext); - struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; - valid_block = le32_to_cpu(es->s_first_data_block) + - EXT4_SB(inode->i_sb)->s_gdb_count; - if (unlikely(block <= valid_block || - ((block + len) > ext4_blocks_count(es)))) - return 0; - else - return 1; + return ext4_data_block_valid(EXT4_SB(inode->i_sb), block, len); } static int ext4_valid_extent_idx(struct inode *inode, struct ext4_extent_idx *ext_idx) { - ext4_fsblk_t block = idx_pblock(ext_idx), valid_block; - struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; + ext4_fsblk_t block = idx_pblock(ext_idx); - valid_block = le32_to_cpu(es->s_first_data_block) + - EXT4_SB(inode->i_sb)->s_gdb_count; - if (unlikely(block <= valid_block || - (block >= ext4_blocks_count(es)))) - return 0; - else - return 1; + return ext4_data_block_valid(EXT4_SB(inode->i_sb), block, 1); } static int ext4_valid_extent_entries(struct inode *inode, @@ -2097,12 +2083,16 @@ ext4_ext_rm_leaf(handle_t *handle, struct inode *inode, ex = EXT_LAST_EXTENT(eh); ex_ee_block = le32_to_cpu(ex->ee_block); - if (ext4_ext_is_uninitialized(ex)) - uninitialized = 1; ex_ee_len = ext4_ext_get_actual_len(ex); while (ex >= EXT_FIRST_EXTENT(eh) && ex_ee_block + ex_ee_len > start) { + + if (ext4_ext_is_uninitialized(ex)) + uninitialized = 1; + else + uninitialized = 0; + ext_debug("remove ext %lu:%u\n", ex_ee_block, ex_ee_len); path[depth].p_ext = ex; @@ -2784,7 +2774,7 @@ static int ext4_ext_convert_to_initialized(handle_t *handle, int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, ext4_lblk_t iblock, unsigned int max_blocks, struct buffer_head *bh_result, - int create, int extend_disksize) + int flags) { struct ext4_ext_path *path = NULL; struct ext4_extent_header *eh; @@ -2793,7 +2783,6 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, int err = 0, depth, ret, cache_type; unsigned int allocated = 0; struct ext4_allocation_request ar; - loff_t disksize; __clear_bit(BH_New, &bh_result->b_state); ext_debug("blocks %u/%u requested for inode %u\n", @@ -2803,7 +2792,7 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, cache_type = ext4_ext_in_cache(inode, iblock, &newex); if (cache_type) { if (cache_type == EXT4_EXT_CACHE_GAP) { - if (!create) { + if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) { /* * block isn't allocated yet and * user doesn't want to allocate it @@ -2869,9 +2858,11 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, EXT4_EXT_CACHE_EXTENT); goto out; } - if (create == EXT4_CREATE_UNINITIALIZED_EXT) + if (flags & EXT4_GET_BLOCKS_UNINIT_EXT) goto out; - if (!create) { + if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) { + if (allocated > max_blocks) + allocated = max_blocks; /* * We have blocks reserved already. We * return allocated blocks so that delalloc @@ -2879,8 +2870,6 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, * the buffer head will be unmapped so that * a read from the block returns 0s. */ - if (allocated > max_blocks) - allocated = max_blocks; set_buffer_unwritten(bh_result); bh_result->b_bdev = inode->i_sb->s_bdev; bh_result->b_blocknr = newblock; @@ -2903,7 +2892,7 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, * requested block isn't allocated yet; * we couldn't try to create block if create flag is zero */ - if (!create) { + if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) { /* * put just found gap into cache to speed up * subsequent requests @@ -2932,10 +2921,10 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, * EXT_UNINIT_MAX_LEN. */ if (max_blocks > EXT_INIT_MAX_LEN && - create != EXT4_CREATE_UNINITIALIZED_EXT) + !(flags & EXT4_GET_BLOCKS_UNINIT_EXT)) max_blocks = EXT_INIT_MAX_LEN; else if (max_blocks > EXT_UNINIT_MAX_LEN && - create == EXT4_CREATE_UNINITIALIZED_EXT) + (flags & EXT4_GET_BLOCKS_UNINIT_EXT)) max_blocks = EXT_UNINIT_MAX_LEN; /* Check if we can really insert (iblock)::(iblock+max_blocks) extent */ @@ -2966,7 +2955,7 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, /* try to insert new extent into found leaf and return */ ext4_ext_store_pblock(&newex, newblock); newex.ee_len = cpu_to_le16(ar.len); - if (create == EXT4_CREATE_UNINITIALIZED_EXT) /* Mark uninitialized */ + if (flags & EXT4_GET_BLOCKS_UNINIT_EXT) /* Mark uninitialized */ ext4_ext_mark_uninitialized(&newex); err = ext4_ext_insert_extent(handle, inode, path, &newex); if (err) { @@ -2983,18 +2972,10 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode, newblock = ext_pblock(&newex); allocated = ext4_ext_get_actual_len(&newex); outnew: - if (extend_disksize) { - disksize = ((loff_t) iblock + ar.len) << inode->i_blkbits; - if (disksize > i_size_read(inode)) - disksize = i_size_read(inode); - if (disksize > EXT4_I(inode)->i_disksize) - EXT4_I(inode)->i_disksize = disksize; - } - set_buffer_new(bh_result); /* Cache only when it is _not_ an uninitialized extent */ - if (create != EXT4_CREATE_UNINITIALIZED_EXT) + if ((flags & EXT4_GET_BLOCKS_UNINIT_EXT) == 0) ext4_ext_put_in_cache(inode, iblock, allocated, newblock, EXT4_EXT_CACHE_EXTENT); out: @@ -3150,9 +3131,10 @@ long ext4_fallocate(struct inode *inode, int mode, loff_t offset, loff_t len) ret = PTR_ERR(handle); break; } - ret = ext4_get_blocks_wrap(handle, inode, block, - max_blocks, &map_bh, - EXT4_CREATE_UNINITIALIZED_EXT, 0, 0); + map_bh.b_state = 0; + ret = ext4_get_blocks(handle, inode, block, + max_blocks, &map_bh, + EXT4_GET_BLOCKS_CREATE_UNINIT_EXT); if (ret <= 0) { #ifdef EXT4FS_DEBUG WARN_ON(ret <= 0); @@ -3195,7 +3177,7 @@ static int ext4_ext_fiemap_cb(struct inode *inode, struct ext4_ext_path *path, void *data) { struct fiemap_extent_info *fieinfo = data; - unsigned long blksize_bits = inode->i_sb->s_blocksize_bits; + unsigned char blksize_bits = inode->i_sb->s_blocksize_bits; __u64 logical; __u64 physical; __u64 length; @@ -3242,9 +3224,16 @@ static int ext4_ext_fiemap_cb(struct inode *inode, struct ext4_ext_path *path, * * XXX this might miss a single-block extent at EXT_MAX_BLOCK */ - if (logical + length - 1 == EXT_MAX_BLOCK || - ext4_ext_next_allocated_block(path) == EXT_MAX_BLOCK) + if (ext4_ext_next_allocated_block(path) == EXT_MAX_BLOCK || + newex->ec_block + newex->ec_len - 1 == EXT_MAX_BLOCK) { + loff_t size = i_size_read(inode); + loff_t bs = EXT4_BLOCK_SIZE(inode->i_sb); + flags |= FIEMAP_EXTENT_LAST; + if ((flags & FIEMAP_EXTENT_DELALLOC) && + logical+length > size) + length = (size - logical + bs - 1) & ~(bs-1); + } error = fiemap_fill_next_extent(fieinfo, logical, physical, length, flags); @@ -3318,10 +3307,10 @@ int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, * Walk the extent tree gathering extent information. * ext4_ext_fiemap_cb will push extents back to user. */ - down_write(&EXT4_I(inode)->i_data_sem); + down_read(&EXT4_I(inode)->i_data_sem); error = ext4_ext_walk_space(inode, start_blk, len_blks, ext4_ext_fiemap_cb, fieinfo); - up_write(&EXT4_I(inode)->i_data_sem); + up_read(&EXT4_I(inode)->i_data_sem); } return error; diff --git a/fs/ext4/group.h b/fs/ext4/group.h deleted file mode 100644 index c2c0a8d06d0e..000000000000 --- a/fs/ext4/group.h +++ /dev/null @@ -1,29 +0,0 @@ -/* - * linux/fs/ext4/group.h - * - * Copyright (C) 2007 Cluster File Systems, Inc - * - * Author: Andreas Dilger - */ - -#ifndef _LINUX_EXT4_GROUP_H -#define _LINUX_EXT4_GROUP_H - -extern __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 group, - struct ext4_group_desc *gdp); -extern int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 group, - struct ext4_group_desc *gdp); -struct buffer_head *ext4_read_block_bitmap(struct super_block *sb, - ext4_group_t block_group); -extern unsigned ext4_init_block_bitmap(struct super_block *sb, - struct buffer_head *bh, - ext4_group_t group, - struct ext4_group_desc *desc); -#define ext4_free_blocks_after_init(sb, group, desc) \ - ext4_init_block_bitmap(sb, NULL, group, desc) -extern unsigned ext4_init_inode_bitmap(struct super_block *sb, - struct buffer_head *bh, - ext4_group_t group, - struct ext4_group_desc *desc); -extern void mark_bitmap_end(int start_bit, int end_bit, char *bitmap); -#endif /* _LINUX_EXT4_GROUP_H */ diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c index f18e0a08a6b5..3743bd849bce 100644 --- a/fs/ext4/ialloc.c +++ b/fs/ext4/ialloc.c @@ -27,7 +27,6 @@ #include "ext4_jbd2.h" #include "xattr.h" #include "acl.h" -#include "group.h" /* * ialloc.c contains the inodes allocation and deallocation routines @@ -123,16 +122,16 @@ ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group) unlock_buffer(bh); return bh; } - spin_lock(sb_bgl_lock(EXT4_SB(sb), block_group)); + ext4_lock_group(sb, block_group); if (desc->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT)) { ext4_init_inode_bitmap(sb, bh, block_group, desc); set_bitmap_uptodate(bh); set_buffer_uptodate(bh); - spin_unlock(sb_bgl_lock(EXT4_SB(sb), block_group)); + ext4_unlock_group(sb, block_group); unlock_buffer(bh); return bh; } - spin_unlock(sb_bgl_lock(EXT4_SB(sb), block_group)); + ext4_unlock_group(sb, block_group); if (buffer_uptodate(bh)) { /* * if not uninit if bh is uptodate, @@ -247,9 +246,8 @@ void ext4_free_inode(handle_t *handle, struct inode *inode) goto error_return; /* Ok, now we can actually update the inode bitmaps.. */ - spin_lock(sb_bgl_lock(sbi, block_group)); - cleared = ext4_clear_bit(bit, bitmap_bh->b_data); - spin_unlock(sb_bgl_lock(sbi, block_group)); + cleared = ext4_clear_bit_atomic(ext4_group_lock_ptr(sb, block_group), + bit, bitmap_bh->b_data); if (!cleared) ext4_error(sb, "ext4_free_inode", "bit already cleared for inode %lu", ino); @@ -261,7 +259,7 @@ void ext4_free_inode(handle_t *handle, struct inode *inode) if (fatal) goto error_return; if (gdp) { - spin_lock(sb_bgl_lock(sbi, block_group)); + ext4_lock_group(sb, block_group); count = ext4_free_inodes_count(sb, gdp) + 1; ext4_free_inodes_set(sb, gdp, count); if (is_directory) { @@ -277,7 +275,7 @@ void ext4_free_inode(handle_t *handle, struct inode *inode) } gdp->bg_checksum = ext4_group_desc_csum(sbi, block_group, gdp); - spin_unlock(sb_bgl_lock(sbi, block_group)); + ext4_unlock_group(sb, block_group); percpu_counter_inc(&sbi->s_freeinodes_counter); if (is_directory) percpu_counter_dec(&sbi->s_dirs_counter); @@ -316,7 +314,7 @@ void ext4_free_inode(handle_t *handle, struct inode *inode) static int find_group_dir(struct super_block *sb, struct inode *parent, ext4_group_t *best_group) { - ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; + ext4_group_t ngroups = ext4_get_groups_count(sb); unsigned int freei, avefreei; struct ext4_group_desc *desc, *best_desc = NULL; ext4_group_t group; @@ -349,11 +347,10 @@ static int find_group_flex(struct super_block *sb, struct inode *parent, { struct ext4_sb_info *sbi = EXT4_SB(sb); struct ext4_group_desc *desc; - struct buffer_head *bh; struct flex_groups *flex_group = sbi->s_flex_groups; ext4_group_t parent_group = EXT4_I(parent)->i_block_group; ext4_group_t parent_fbg_group = ext4_flex_group(sbi, parent_group); - ext4_group_t ngroups = sbi->s_groups_count; + ext4_group_t ngroups = ext4_get_groups_count(sb); int flex_size = ext4_flex_bg_size(sbi); ext4_group_t best_flex = parent_fbg_group; int blocks_per_flex = sbi->s_blocks_per_group * flex_size; @@ -362,7 +359,7 @@ static int find_group_flex(struct super_block *sb, struct inode *parent, ext4_group_t n_fbg_groups; ext4_group_t i; - n_fbg_groups = (sbi->s_groups_count + flex_size - 1) >> + n_fbg_groups = (ngroups + flex_size - 1) >> sbi->s_log_groups_per_flex; find_close_to_parent: @@ -404,7 +401,7 @@ static int find_group_flex(struct super_block *sb, struct inode *parent, found_flexbg: for (i = best_flex * flex_size; i < ngroups && i < (best_flex + 1) * flex_size; i++) { - desc = ext4_get_group_desc(sb, i, &bh); + desc = ext4_get_group_desc(sb, i, NULL); if (ext4_free_inodes_count(sb, desc)) { *best_group = i; goto out; @@ -478,20 +475,21 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent, { ext4_group_t parent_group = EXT4_I(parent)->i_block_group; struct ext4_sb_info *sbi = EXT4_SB(sb); - ext4_group_t ngroups = sbi->s_groups_count; + ext4_group_t real_ngroups = ext4_get_groups_count(sb); int inodes_per_group = EXT4_INODES_PER_GROUP(sb); unsigned int freei, avefreei; ext4_fsblk_t freeb, avefreeb; unsigned int ndirs; int max_dirs, min_inodes; ext4_grpblk_t min_blocks; - ext4_group_t i, grp, g; + ext4_group_t i, grp, g, ngroups; struct ext4_group_desc *desc; struct orlov_stats stats; int flex_size = ext4_flex_bg_size(sbi); + ngroups = real_ngroups; if (flex_size > 1) { - ngroups = (ngroups + flex_size - 1) >> + ngroups = (real_ngroups + flex_size - 1) >> sbi->s_log_groups_per_flex; parent_group >>= sbi->s_log_groups_per_flex; } @@ -543,7 +541,7 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent, */ grp *= flex_size; for (i = 0; i < flex_size; i++) { - if (grp+i >= sbi->s_groups_count) + if (grp+i >= real_ngroups) break; desc = ext4_get_group_desc(sb, grp+i, NULL); if (desc && ext4_free_inodes_count(sb, desc)) { @@ -583,7 +581,7 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent, } fallback: - ngroups = sbi->s_groups_count; + ngroups = real_ngroups; avefreei = freei / ngroups; fallback_retry: parent_group = EXT4_I(parent)->i_block_group; @@ -613,9 +611,8 @@ static int find_group_other(struct super_block *sb, struct inode *parent, ext4_group_t *group, int mode) { ext4_group_t parent_group = EXT4_I(parent)->i_block_group; - ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; + ext4_group_t i, last, ngroups = ext4_get_groups_count(sb); struct ext4_group_desc *desc; - ext4_group_t i, last; int flex_size = ext4_flex_bg_size(EXT4_SB(sb)); /* @@ -708,10 +705,10 @@ static int find_group_other(struct super_block *sb, struct inode *parent, /* * claim the inode from the inode bitmap. If the group - * is uninit we need to take the groups's sb_bgl_lock + * is uninit we need to take the groups's ext4_group_lock * and clear the uninit flag. The inode bitmap update * and group desc uninit flag clear should be done - * after holding sb_bgl_lock so that ext4_read_inode_bitmap + * after holding ext4_group_lock so that ext4_read_inode_bitmap * doesn't race with the ext4_claim_inode */ static int ext4_claim_inode(struct super_block *sb, @@ -722,7 +719,7 @@ static int ext4_claim_inode(struct super_block *sb, struct ext4_sb_info *sbi = EXT4_SB(sb); struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); - spin_lock(sb_bgl_lock(sbi, group)); + ext4_lock_group(sb, group); if (ext4_set_bit(ino, inode_bitmap_bh->b_data)) { /* not a free inode */ retval = 1; @@ -731,7 +728,7 @@ static int ext4_claim_inode(struct super_block *sb, ino++; if ((group == 0 && ino < EXT4_FIRST_INO(sb)) || ino > EXT4_INODES_PER_GROUP(sb)) { - spin_unlock(sb_bgl_lock(sbi, group)); + ext4_unlock_group(sb, group); ext4_error(sb, __func__, "reserved inode or inode > inodes count - " "block_group = %u, inode=%lu", group, @@ -780,7 +777,7 @@ static int ext4_claim_inode(struct super_block *sb, } gdp->bg_checksum = ext4_group_desc_csum(sbi, group, gdp); err_ret: - spin_unlock(sb_bgl_lock(sbi, group)); + ext4_unlock_group(sb, group); return retval; } @@ -799,11 +796,10 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode) struct super_block *sb; struct buffer_head *inode_bitmap_bh = NULL; struct buffer_head *group_desc_bh; - ext4_group_t group = 0; + ext4_group_t ngroups, group = 0; unsigned long ino = 0; struct inode *inode; struct ext4_group_desc *gdp = NULL; - struct ext4_super_block *es; struct ext4_inode_info *ei; struct ext4_sb_info *sbi; int ret2, err = 0; @@ -818,15 +814,14 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode) return ERR_PTR(-EPERM); sb = dir->i_sb; + ngroups = ext4_get_groups_count(sb); trace_mark(ext4_request_inode, "dev %s dir %lu mode %d", sb->s_id, dir->i_ino, mode); inode = new_inode(sb); if (!inode) return ERR_PTR(-ENOMEM); ei = EXT4_I(inode); - sbi = EXT4_SB(sb); - es = sbi->s_es; if (sbi->s_log_groups_per_flex && test_opt(sb, OLDALLOC)) { ret2 = find_group_flex(sb, dir, &group); @@ -856,7 +851,7 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode) if (ret2 == -1) goto out; - for (i = 0; i < sbi->s_groups_count; i++) { + for (i = 0; i < ngroups; i++) { err = -EIO; gdp = ext4_get_group_desc(sb, group, &group_desc_bh); @@ -917,7 +912,7 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode) * group descriptor metadata has not yet been updated. * So we just go onto the next blockgroup. */ - if (++group == sbi->s_groups_count) + if (++group == ngroups) group = 0; } err = -ENOSPC; @@ -938,7 +933,7 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode) } free = 0; - spin_lock(sb_bgl_lock(sbi, group)); + ext4_lock_group(sb, group); /* recheck and clear flag under lock if we still need to */ if (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) { free = ext4_free_blocks_after_init(sb, group, gdp); @@ -947,7 +942,7 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode) gdp->bg_checksum = ext4_group_desc_csum(sbi, group, gdp); } - spin_unlock(sb_bgl_lock(sbi, group)); + ext4_unlock_group(sb, group); /* Don't need to dirty bitmap block if we didn't change it */ if (free) { @@ -1158,7 +1153,7 @@ unsigned long ext4_count_free_inodes(struct super_block *sb) { unsigned long desc_count; struct ext4_group_desc *gdp; - ext4_group_t i; + ext4_group_t i, ngroups = ext4_get_groups_count(sb); #ifdef EXT4FS_DEBUG struct ext4_super_block *es; unsigned long bitmap_count, x; @@ -1168,7 +1163,7 @@ unsigned long ext4_count_free_inodes(struct super_block *sb) desc_count = 0; bitmap_count = 0; gdp = NULL; - for (i = 0; i < EXT4_SB(sb)->s_groups_count; i++) { + for (i = 0; i < ngroups; i++) { gdp = ext4_get_group_desc(sb, i, NULL); if (!gdp) continue; @@ -1190,7 +1185,7 @@ unsigned long ext4_count_free_inodes(struct super_block *sb) return desc_count; #else desc_count = 0; - for (i = 0; i < EXT4_SB(sb)->s_groups_count; i++) { + for (i = 0; i < ngroups; i++) { gdp = ext4_get_group_desc(sb, i, NULL); if (!gdp) continue; @@ -1205,9 +1200,9 @@ unsigned long ext4_count_free_inodes(struct super_block *sb) unsigned long ext4_count_dirs(struct super_block * sb) { unsigned long count = 0; - ext4_group_t i; + ext4_group_t i, ngroups = ext4_get_groups_count(sb); - for (i = 0; i < EXT4_SB(sb)->s_groups_count; i++) { + for (i = 0; i < ngroups; i++) { struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); if (!gdp) continue; diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 2a9ffd528dd1..875db944b22f 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -372,20 +372,21 @@ static int ext4_block_to_path(struct inode *inode, } static int __ext4_check_blockref(const char *function, struct inode *inode, - __le32 *p, unsigned int max) { - - unsigned int maxblocks = ext4_blocks_count(EXT4_SB(inode->i_sb)->s_es); + __le32 *p, unsigned int max) +{ __le32 *bref = p; + unsigned int blk; + while (bref < p+max) { - if (unlikely(le32_to_cpu(*bref) >= maxblocks)) { + blk = le32_to_cpu(*bref++); + if (blk && + unlikely(!ext4_data_block_valid(EXT4_SB(inode->i_sb), + blk, 1))) { ext4_error(inode->i_sb, function, - "block reference %u >= max (%u) " - "in inode #%lu, offset=%d", - le32_to_cpu(*bref), maxblocks, - inode->i_ino, (int)(bref-p)); + "invalid block reference %u " + "in inode #%lu", blk, inode->i_ino); return -EIO; } - bref++; } return 0; } @@ -892,6 +893,10 @@ static int ext4_splice_branch(handle_t *handle, struct inode *inode, } /* + * The ext4_ind_get_blocks() function handles non-extents inodes + * (i.e., using the traditional indirect/double-indirect i_blocks + * scheme) for ext4_get_blocks(). + * * Allocation strategy is simple: if we have to allocate something, we will * have to go the whole way to leaf. So let's do it before attaching anything * to tree, set linkage between the newborn blocks, write them if sync is @@ -909,15 +914,16 @@ static int ext4_splice_branch(handle_t *handle, struct inode *inode, * return = 0, if plain lookup failed. * return < 0, error case. * - * - * Need to be called with - * down_read(&EXT4_I(inode)->i_data_sem) if not allocating file system block - * (ie, create is zero). Otherwise down_write(&EXT4_I(inode)->i_data_sem) + * The ext4_ind_get_blocks() function should be called with + * down_write(&EXT4_I(inode)->i_data_sem) if allocating filesystem + * blocks (i.e., flags has EXT4_GET_BLOCKS_CREATE set) or + * down_read(&EXT4_I(inode)->i_data_sem) if not allocating file system + * blocks. */ -static int ext4_get_blocks_handle(handle_t *handle, struct inode *inode, +static int ext4_ind_get_blocks(handle_t *handle, struct inode *inode, ext4_lblk_t iblock, unsigned int maxblocks, struct buffer_head *bh_result, - int create, int extend_disksize) + int flags) { int err = -EIO; ext4_lblk_t offsets[4]; @@ -927,14 +933,11 @@ static int ext4_get_blocks_handle(handle_t *handle, struct inode *inode, int indirect_blks; int blocks_to_boundary = 0; int depth; - struct ext4_inode_info *ei = EXT4_I(inode); int count = 0; ext4_fsblk_t first_block = 0; - loff_t disksize; - J_ASSERT(!(EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL)); - J_ASSERT(handle != NULL || create == 0); + J_ASSERT(handle != NULL || (flags & EXT4_GET_BLOCKS_CREATE) == 0); depth = ext4_block_to_path(inode, iblock, offsets, &blocks_to_boundary); @@ -963,7 +966,7 @@ static int ext4_get_blocks_handle(handle_t *handle, struct inode *inode, } /* Next simple case - plain lookup or failed read of indirect block */ - if (!create || err == -EIO) + if ((flags & EXT4_GET_BLOCKS_CREATE) == 0 || err == -EIO) goto cleanup; /* @@ -997,19 +1000,7 @@ static int ext4_get_blocks_handle(handle_t *handle, struct inode *inode, if (!err) err = ext4_splice_branch(handle, inode, iblock, partial, indirect_blks, count); - /* - * i_disksize growing is protected by i_data_sem. Don't forget to - * protect it if you're about to implement concurrent - * ext4_get_block() -bzzz - */ - if (!err && extend_disksize) { - disksize = ((loff_t) iblock + count) << inode->i_blkbits; - if (disksize > i_size_read(inode)) - disksize = i_size_read(inode); - if (disksize > ei->i_disksize) - ei->i_disksize = disksize; - } - if (err) + else goto cleanup; set_buffer_new(bh_result); @@ -1120,8 +1111,23 @@ static void ext4_da_update_reserve_space(struct inode *inode, int used) ext4_discard_preallocations(inode); } +static int check_block_validity(struct inode *inode, sector_t logical, + sector_t phys, int len) +{ + if (!ext4_data_block_valid(EXT4_SB(inode->i_sb), phys, len)) { + ext4_error(inode->i_sb, "check_block_validity", + "inode #%lu logical block %llu mapped to %llu " + "(size %d)", inode->i_ino, + (unsigned long long) logical, + (unsigned long long) phys, len); + WARN_ON(1); + return -EIO; + } + return 0; +} + /* - * The ext4_get_blocks_wrap() function try to look up the requested blocks, + * The ext4_get_blocks() function tries to look up the requested blocks, * and returns if the blocks are already mapped. * * Otherwise it takes the write lock of the i_data_sem and allocate blocks @@ -1129,7 +1135,7 @@ static void ext4_da_update_reserve_space(struct inode *inode, int used) * mapped. * * If file type is extents based, it will call ext4_ext_get_blocks(), - * Otherwise, call with ext4_get_blocks_handle() to handle indirect mapping + * Otherwise, call with ext4_ind_get_blocks() to handle indirect mapping * based files * * On success, it returns the number of blocks being mapped or allocate. @@ -1142,9 +1148,9 @@ static void ext4_da_update_reserve_space(struct inode *inode, int used) * * It returns the error in case of allocation failure. */ -int ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, sector_t block, - unsigned int max_blocks, struct buffer_head *bh, - int create, int extend_disksize, int flag) +int ext4_get_blocks(handle_t *handle, struct inode *inode, sector_t block, + unsigned int max_blocks, struct buffer_head *bh, + int flags) { int retval; @@ -1152,21 +1158,28 @@ int ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, sector_t block, clear_buffer_unwritten(bh); /* - * Try to see if we can get the block without requesting - * for new file system block. + * Try to see if we can get the block without requesting a new + * file system block. */ down_read((&EXT4_I(inode)->i_data_sem)); if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) { retval = ext4_ext_get_blocks(handle, inode, block, max_blocks, - bh, 0, 0); + bh, 0); } else { - retval = ext4_get_blocks_handle(handle, - inode, block, max_blocks, bh, 0, 0); + retval = ext4_ind_get_blocks(handle, inode, block, max_blocks, + bh, 0); } up_read((&EXT4_I(inode)->i_data_sem)); + if (retval > 0 && buffer_mapped(bh)) { + int ret = check_block_validity(inode, block, + bh->b_blocknr, retval); + if (ret != 0) + return ret; + } + /* If it is only a block(s) look up */ - if (!create) + if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) return retval; /* @@ -1205,7 +1218,7 @@ int ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, sector_t block, * let the underlying get_block() function know to * avoid double accounting */ - if (flag) + if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) EXT4_I(inode)->i_delalloc_reserved_flag = 1; /* * We need to check for EXT4 here because migrate @@ -1213,10 +1226,10 @@ int ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, sector_t block, */ if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) { retval = ext4_ext_get_blocks(handle, inode, block, max_blocks, - bh, create, extend_disksize); + bh, flags); } else { - retval = ext4_get_blocks_handle(handle, inode, block, - max_blocks, bh, create, extend_disksize); + retval = ext4_ind_get_blocks(handle, inode, block, + max_blocks, bh, flags); if (retval > 0 && buffer_new(bh)) { /* @@ -1229,18 +1242,23 @@ int ext4_get_blocks_wrap(handle_t *handle, struct inode *inode, sector_t block, } } - if (flag) { + if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) EXT4_I(inode)->i_delalloc_reserved_flag = 0; - /* - * Update reserved blocks/metadata blocks - * after successful block allocation - * which were deferred till now - */ - if ((retval > 0) && buffer_delay(bh)) - ext4_da_update_reserve_space(inode, retval); - } + + /* + * Update reserved blocks/metadata blocks after successful + * block allocation which had been deferred till now. + */ + if ((retval > 0) && (flags & EXT4_GET_BLOCKS_UPDATE_RESERVE_SPACE)) + ext4_da_update_reserve_space(inode, retval); up_write((&EXT4_I(inode)->i_data_sem)); + if (retval > 0 && buffer_mapped(bh)) { + int ret = check_block_validity(inode, block, + bh->b_blocknr, retval); + if (ret != 0) + return ret; + } return retval; } @@ -1268,8 +1286,8 @@ int ext4_get_block(struct inode *inode, sector_t iblock, started = 1; } - ret = ext4_get_blocks_wrap(handle, inode, iblock, - max_blocks, bh_result, create, 0, 0); + ret = ext4_get_blocks(handle, inode, iblock, max_blocks, bh_result, + create ? EXT4_GET_BLOCKS_CREATE : 0); if (ret > 0) { bh_result->b_size = (ret << inode->i_blkbits); ret = 0; @@ -1288,17 +1306,19 @@ struct buffer_head *ext4_getblk(handle_t *handle, struct inode *inode, { struct buffer_head dummy; int fatal = 0, err; + int flags = 0; J_ASSERT(handle != NULL || create == 0); dummy.b_state = 0; dummy.b_blocknr = -1000; buffer_trace_init(&dummy.b_history); - err = ext4_get_blocks_wrap(handle, inode, block, 1, - &dummy, create, 1, 0); + if (create) + flags |= EXT4_GET_BLOCKS_CREATE; + err = ext4_get_blocks(handle, inode, block, 1, &dummy, flags); /* - * ext4_get_blocks_handle() returns number of blocks - * mapped. 0 in case of a HOLE. + * ext4_get_blocks() returns number of blocks mapped. 0 in + * case of a HOLE. */ if (err > 0) { if (err > 1) @@ -1439,7 +1459,7 @@ static int ext4_write_begin(struct file *file, struct address_space *mapping, struct page **pagep, void **fsdata) { struct inode *inode = mapping->host; - int ret, needed_blocks = ext4_writepage_trans_blocks(inode); + int ret, needed_blocks; handle_t *handle; int retries = 0; struct page *page; @@ -1450,6 +1470,11 @@ static int ext4_write_begin(struct file *file, struct address_space *mapping, "dev %s ino %lu pos %llu len %u flags %u", inode->i_sb->s_id, inode->i_ino, (unsigned long long) pos, len, flags); + /* + * Reserve one block more for addition to orphan list in case + * we allocate blocks but write fails for some reason + */ + needed_blocks = ext4_writepage_trans_blocks(inode) + 1; index = pos >> PAGE_CACHE_SHIFT; from = pos & (PAGE_CACHE_SIZE - 1); to = from + len; @@ -1483,15 +1508,30 @@ static int ext4_write_begin(struct file *file, struct address_space *mapping, if (ret) { unlock_page(page); - ext4_journal_stop(handle); page_cache_release(page); /* * block_write_begin may have instantiated a few blocks * outside i_size. Trim these off again. Don't need * i_size_read because we hold i_mutex. + * + * Add inode to orphan list in case we crash before + * truncate finishes */ if (pos + len > inode->i_size) + ext4_orphan_add(handle, inode); + + ext4_journal_stop(handle); + if (pos + len > inode->i_size) { vmtruncate(inode, inode->i_size); + /* + * If vmtruncate failed early the inode might + * still be on the orphan list; we need to + * make sure the inode is removed from the + * orphan list in that case. + */ + if (inode->i_nlink) + ext4_orphan_del(NULL, inode); + } } if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) @@ -1509,6 +1549,52 @@ static int write_end_fn(handle_t *handle, struct buffer_head *bh) return ext4_handle_dirty_metadata(handle, NULL, bh); } +static int ext4_generic_write_end(struct file *file, + struct address_space *mapping, + loff_t pos, unsigned len, unsigned copied, + struct page *page, void *fsdata) +{ + int i_size_changed = 0; + struct inode *inode = mapping->host; + handle_t *handle = ext4_journal_current_handle(); + + copied = block_write_end(file, mapping, pos, len, copied, page, fsdata); + + /* + * No need to use i_size_read() here, the i_size + * cannot change under us because we hold i_mutex. + * + * But it's important to update i_size while still holding page lock: + * page writeout could otherwise come in and zero beyond i_size. + */ + if (pos + copied > inode->i_size) { + i_size_write(inode, pos + copied); + i_size_changed = 1; + } + + if (pos + copied > EXT4_I(inode)->i_disksize) { + /* We need to mark inode dirty even if + * new_i_size is less that inode->i_size + * bu greater than i_disksize.(hint delalloc) + */ + ext4_update_i_disksize(inode, (pos + copied)); + i_size_changed = 1; + } + unlock_page(page); + page_cache_release(page); + + /* + * Don't mark the inode dirty under page lock. First, it unnecessarily + * makes the holding time of page lock longer. Second, it forces lock + * ordering of page lock and transaction start for journaling + * filesystems. + */ + if (i_size_changed) + ext4_mark_inode_dirty(handle, inode); + + return copied; +} + /* * We need to pick up the new inode size which generic_commit_write gave us * `file' can be NULL - eg, when called from page_symlink(). @@ -1532,21 +1618,15 @@ static int ext4_ordered_write_end(struct file *file, ret = ext4_jbd2_file_inode(handle, inode); if (ret == 0) { - loff_t new_i_size; - - new_i_size = pos + copied; - if (new_i_size > EXT4_I(inode)->i_disksize) { - ext4_update_i_disksize(inode, new_i_size); - /* We need to mark inode dirty even if - * new_i_size is less that inode->i_size - * bu greater than i_disksize.(hint delalloc) - */ - ext4_mark_inode_dirty(handle, inode); - } - - ret2 = generic_write_end(file, mapping, pos, len, copied, + ret2 = ext4_generic_write_end(file, mapping, pos, len, copied, page, fsdata); copied = ret2; + if (pos + len > inode->i_size) + /* if we have allocated more blocks and copied + * less. We will have blocks allocated outside + * inode->i_size. So truncate them + */ + ext4_orphan_add(handle, inode); if (ret2 < 0) ret = ret2; } @@ -1554,6 +1634,18 @@ static int ext4_ordered_write_end(struct file *file, if (!ret) ret = ret2; + if (pos + len > inode->i_size) { + vmtruncate(inode, inode->i_size); + /* + * If vmtruncate failed early the inode might still be + * on the orphan list; we need to make sure the inode + * is removed from the orphan list in that case. + */ + if (inode->i_nlink) + ext4_orphan_del(NULL, inode); + } + + return ret ? ret : copied; } @@ -1565,25 +1657,21 @@ static int ext4_writeback_write_end(struct file *file, handle_t *handle = ext4_journal_current_handle(); struct inode *inode = mapping->host; int ret = 0, ret2; - loff_t new_i_size; trace_mark(ext4_writeback_write_end, "dev %s ino %lu pos %llu len %u copied %u", inode->i_sb->s_id, inode->i_ino, (unsigned long long) pos, len, copied); - new_i_size = pos + copied; - if (new_i_size > EXT4_I(inode)->i_disksize) { - ext4_update_i_disksize(inode, new_i_size); - /* We need to mark inode dirty even if - * new_i_size is less that inode->i_size - * bu greater than i_disksize.(hint delalloc) - */ - ext4_mark_inode_dirty(handle, inode); - } - - ret2 = generic_write_end(file, mapping, pos, len, copied, + ret2 = ext4_generic_write_end(file, mapping, pos, len, copied, page, fsdata); copied = ret2; + if (pos + len > inode->i_size) + /* if we have allocated more blocks and copied + * less. We will have blocks allocated outside + * inode->i_size. So truncate them + */ + ext4_orphan_add(handle, inode); + if (ret2 < 0) ret = ret2; @@ -1591,6 +1679,17 @@ static int ext4_writeback_write_end(struct file *file, if (!ret) ret = ret2; + if (pos + len > inode->i_size) { + vmtruncate(inode, inode->i_size); + /* + * If vmtruncate failed early the inode might still be + * on the orphan list; we need to make sure the inode + * is removed from the orphan list in that case. + */ + if (inode->i_nlink) + ext4_orphan_del(NULL, inode); + } + return ret ? ret : copied; } @@ -1635,10 +1734,27 @@ static int ext4_journalled_write_end(struct file *file, } unlock_page(page); + page_cache_release(page); + if (pos + len > inode->i_size) + /* if we have allocated more blocks and copied + * less. We will have blocks allocated outside + * inode->i_size. So truncate them + */ + ext4_orphan_add(handle, inode); + ret2 = ext4_journal_stop(handle); if (!ret) ret = ret2; - page_cache_release(page); + if (pos + len > inode->i_size) { + vmtruncate(inode, inode->i_size); + /* + * If vmtruncate failed early the inode might still be + * on the orphan list; we need to make sure the inode + * is removed from the orphan list in that case. + */ + if (inode->i_nlink) + ext4_orphan_del(NULL, inode); + } return ret ? ret : copied; } @@ -1852,7 +1968,7 @@ static int mpage_da_submit_io(struct mpage_da_data *mpd) * @logical - first logical block to start assignment with * * the function goes through all passed space and put actual disk - * block numbers into buffer heads, dropping BH_Delay + * block numbers into buffer heads, dropping BH_Delay and BH_Unwritten */ static void mpage_put_bnr_to_bhs(struct mpage_da_data *mpd, sector_t logical, struct buffer_head *exbh) @@ -1902,16 +2018,24 @@ static void mpage_put_bnr_to_bhs(struct mpage_da_data *mpd, sector_t logical, do { if (cur_logical >= logical + blocks) break; - if (buffer_delay(bh)) { - bh->b_blocknr = pblock; - clear_buffer_delay(bh); - bh->b_bdev = inode->i_sb->s_bdev; - } else if (buffer_unwritten(bh)) { - bh->b_blocknr = pblock; - clear_buffer_unwritten(bh); - set_buffer_mapped(bh); - set_buffer_new(bh); - bh->b_bdev = inode->i_sb->s_bdev; + + if (buffer_delay(bh) || + buffer_unwritten(bh)) { + + BUG_ON(bh->b_bdev != inode->i_sb->s_bdev); + + if (buffer_delay(bh)) { + clear_buffer_delay(bh); + bh->b_blocknr = pblock; + } else { + /* + * unwritten already should have + * blocknr assigned. Verify that + */ + clear_buffer_unwritten(bh); + BUG_ON(bh->b_blocknr != pblock); + } + } else if (buffer_mapped(bh)) BUG_ON(bh->b_blocknr != pblock); @@ -1990,51 +2114,6 @@ static void ext4_print_free_blocks(struct inode *inode) return; } -#define EXT4_DELALLOC_RSVED 1 -static int ext4_da_get_block_write(struct inode *inode, sector_t iblock, - struct buffer_head *bh_result, int create) -{ - int ret; - unsigned max_blocks = bh_result->b_size >> inode->i_blkbits; - loff_t disksize = EXT4_I(inode)->i_disksize; - handle_t *handle = NULL; - - handle = ext4_journal_current_handle(); - BUG_ON(!handle); - ret = ext4_get_blocks_wrap(handle, inode, iblock, max_blocks, - bh_result, create, 0, EXT4_DELALLOC_RSVED); - if (ret <= 0) - return ret; - - bh_result->b_size = (ret << inode->i_blkbits); - - if (ext4_should_order_data(inode)) { - int retval; - retval = ext4_jbd2_file_inode(handle, inode); - if (retval) - /* - * Failed to add inode for ordered mode. Don't - * update file size - */ - return retval; - } - - /* - * Update on-disk size along with block allocation we don't - * use 'extend_disksize' as size may change within already - * allocated block -bzzz - */ - disksize = ((loff_t) iblock + ret) << inode->i_blkbits; - if (disksize > i_size_read(inode)) - disksize = i_size_read(inode); - if (disksize > EXT4_I(inode)->i_disksize) { - ext4_update_i_disksize(inode, disksize); - ret = ext4_mark_inode_dirty(handle, inode); - return ret; - } - return 0; -} - /* * mpage_da_map_blocks - go through given space * @@ -2045,29 +2124,57 @@ static int ext4_da_get_block_write(struct inode *inode, sector_t iblock, */ static int mpage_da_map_blocks(struct mpage_da_data *mpd) { - int err = 0; + int err, blks, get_blocks_flags; struct buffer_head new; - sector_t next; + sector_t next = mpd->b_blocknr; + unsigned max_blocks = mpd->b_size >> mpd->inode->i_blkbits; + loff_t disksize = EXT4_I(mpd->inode)->i_disksize; + handle_t *handle = NULL; /* * We consider only non-mapped and non-allocated blocks */ if ((mpd->b_state & (1 << BH_Mapped)) && - !(mpd->b_state & (1 << BH_Delay))) - return 0; - new.b_state = mpd->b_state; - new.b_blocknr = 0; - new.b_size = mpd->b_size; - next = mpd->b_blocknr; - /* - * If we didn't accumulate anything - * to write simply return - */ - if (!new.b_size) + !(mpd->b_state & (1 << BH_Delay)) && + !(mpd->b_state & (1 << BH_Unwritten))) return 0; - err = ext4_da_get_block_write(mpd->inode, next, &new, 1); - if (err) { + /* + * If we didn't accumulate anything to write simply return + */ + if (!mpd->b_size) + return 0; + + handle = ext4_journal_current_handle(); + BUG_ON(!handle); + + /* + * Call ext4_get_blocks() to allocate any delayed allocation + * blocks, or to convert an uninitialized extent to be + * initialized (in the case where we have written into + * one or more preallocated blocks). + * + * We pass in the magic EXT4_GET_BLOCKS_DELALLOC_RESERVE to + * indicate that we are on the delayed allocation path. This + * affects functions in many different parts of the allocation + * call path. This flag exists primarily because we don't + * want to change *many* call functions, so ext4_get_blocks() + * will set the magic i_delalloc_reserved_flag once the + * inode's allocation semaphore is taken. + * + * If the blocks in questions were delalloc blocks, set + * EXT4_GET_BLOCKS_DELALLOC_RESERVE so the delalloc accounting + * variables are updated after the blocks have been allocated. + */ + new.b_state = 0; + get_blocks_flags = (EXT4_GET_BLOCKS_CREATE | + EXT4_GET_BLOCKS_DELALLOC_RESERVE); + if (mpd->b_state & (1 << BH_Delay)) + get_blocks_flags |= EXT4_GET_BLOCKS_UPDATE_RESERVE_SPACE; + blks = ext4_get_blocks(handle, mpd->inode, next, max_blocks, + &new, get_blocks_flags); + if (blks < 0) { + err = blks; /* * If get block returns with error we simply * return. Later writepage will redirty the page and @@ -2100,12 +2207,14 @@ static int mpage_da_map_blocks(struct mpage_da_data *mpd) if (err == -ENOSPC) { ext4_print_free_blocks(mpd->inode); } - /* invlaidate all the pages */ + /* invalidate all the pages */ ext4_da_block_invalidatepages(mpd, next, mpd->b_size >> mpd->inode->i_blkbits); return err; } - BUG_ON(new.b_size == 0); + BUG_ON(blks == 0); + + new.b_size = (blks << mpd->inode->i_blkbits); if (buffer_new(&new)) __unmap_underlying_blocks(mpd->inode, &new); @@ -2118,6 +2227,23 @@ static int mpage_da_map_blocks(struct mpage_da_data *mpd) (mpd->b_state & (1 << BH_Unwritten))) mpage_put_bnr_to_bhs(mpd, next, &new); + if (ext4_should_order_data(mpd->inode)) { + err = ext4_jbd2_file_inode(handle, mpd->inode); + if (err) + return err; + } + + /* + * Update on-disk size along with block allocation. + */ + disksize = ((loff_t) next + blks) << mpd->inode->i_blkbits; + if (disksize > i_size_read(mpd->inode)) + disksize = i_size_read(mpd->inode); + if (disksize > EXT4_I(mpd->inode)->i_disksize) { + ext4_update_i_disksize(mpd->inode, disksize); + return ext4_mark_inode_dirty(handle, mpd->inode); + } + return 0; } @@ -2192,6 +2318,17 @@ static void mpage_add_bh_to_extent(struct mpage_da_data *mpd, return; } +static int ext4_bh_unmapped_or_delay(handle_t *handle, struct buffer_head *bh) +{ + /* + * unmapped buffer is possible for holes. + * delay buffer is possible with delayed allocation. + * We also need to consider unwritten buffer as unmapped. + */ + return (!buffer_mapped(bh) || buffer_delay(bh) || + buffer_unwritten(bh)) && buffer_dirty(bh); +} + /* * __mpage_da_writepage - finds extent of pages and blocks * @@ -2276,8 +2413,7 @@ static int __mpage_da_writepage(struct page *page, * Otherwise we won't make progress * with the page in ext4_da_writepage */ - if (buffer_dirty(bh) && - (!buffer_mapped(bh) || buffer_delay(bh))) { + if (ext4_bh_unmapped_or_delay(NULL, bh)) { mpage_add_bh_to_extent(mpd, logical, bh->b_size, bh->b_state); @@ -2303,8 +2439,16 @@ static int __mpage_da_writepage(struct page *page, } /* - * this is a special callback for ->write_begin() only - * it's intention is to return mapped block or reserve space + * This is a special get_blocks_t callback which is used by + * ext4_da_write_begin(). It will either return mapped block or + * reserve space for a single block. + * + * For delayed buffer_head we have BH_Mapped, BH_New, BH_Delay set. + * We also have b_blocknr = -1 and b_bdev initialized properly + * + * For unwritten buffer_head we have BH_Mapped, BH_New, BH_Unwritten set. + * We also have b_blocknr = physicalblock mapping unwritten extent and b_bdev + * initialized properly. */ static int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create) @@ -2323,7 +2467,7 @@ static int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, * preallocated blocks are unmapped but should treated * the same as allocated blocks. */ - ret = ext4_get_blocks_wrap(NULL, inode, iblock, 1, bh_result, 0, 0, 0); + ret = ext4_get_blocks(NULL, inode, iblock, 1, bh_result, 0); if ((ret == 0) && !buffer_delay(bh_result)) { /* the block isn't (pre)allocated yet, let's reserve space */ /* @@ -2340,40 +2484,53 @@ static int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, set_buffer_delay(bh_result); } else if (ret > 0) { bh_result->b_size = (ret << inode->i_blkbits); - /* - * With sub-block writes into unwritten extents - * we also need to mark the buffer as new so that - * the unwritten parts of the buffer gets correctly zeroed. - */ - if (buffer_unwritten(bh_result)) + if (buffer_unwritten(bh_result)) { + /* A delayed write to unwritten bh should + * be marked new and mapped. Mapped ensures + * that we don't do get_block multiple times + * when we write to the same offset and new + * ensures that we do proper zero out for + * partial write. + */ set_buffer_new(bh_result); + set_buffer_mapped(bh_result); + } ret = 0; } return ret; } -static int ext4_bh_unmapped_or_delay(handle_t *handle, struct buffer_head *bh) -{ - /* - * unmapped buffer is possible for holes. - * delay buffer is possible with delayed allocation - */ - return ((!buffer_mapped(bh) || buffer_delay(bh)) && buffer_dirty(bh)); -} - -static int ext4_normal_get_block_write(struct inode *inode, sector_t iblock, +/* + * This function is used as a standard get_block_t calback function + * when there is no desire to allocate any blocks. It is used as a + * callback function for block_prepare_write(), nobh_writepage(), and + * block_write_full_page(). These functions should only try to map a + * single block at a time. + * + * Since this function doesn't do block allocations even if the caller + * requests it by passing in create=1, it is critically important that + * any caller checks to make sure that any buffer heads are returned + * by this function are either all already mapped or marked for + * delayed allocation before calling nobh_writepage() or + * block_write_full_page(). Otherwise, b_blocknr could be left + * unitialized, and the page write functions will be taken by + * surprise. + */ +static int noalloc_get_block_write(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create) { int ret = 0; unsigned max_blocks = bh_result->b_size >> inode->i_blkbits; + BUG_ON(bh_result->b_size != inode->i_sb->s_blocksize); + /* * we don't want to do block allocation in writepage * so call get_block_wrap with create = 0 */ - ret = ext4_get_blocks_wrap(NULL, inode, iblock, max_blocks, - bh_result, 0, 0, 0); + ret = ext4_get_blocks(NULL, inode, iblock, max_blocks, bh_result, 0); + BUG_ON(create && ret == 0); if (ret > 0) { bh_result->b_size = (ret << inode->i_blkbits); ret = 0; @@ -2382,10 +2539,11 @@ static int ext4_normal_get_block_write(struct inode *inode, sector_t iblock, } /* - * get called vi ext4_da_writepages after taking page lock (have journal handle) - * get called via journal_submit_inode_data_buffers (no journal handle) - * get called via shrink_page_list via pdflush (no journal handle) - * or grab_page_cache when doing write_begin (have journal handle) + * This function can get called via... + * - ext4_da_writepages after taking page lock (have journal handle) + * - journal_submit_inode_data_buffers (no journal handle) + * - shrink_page_list via pdflush (no journal handle) + * - grab_page_cache when doing write_begin (have journal handle) */ static int ext4_da_writepage(struct page *page, struct writeback_control *wbc) @@ -2436,7 +2594,7 @@ static int ext4_da_writepage(struct page *page, * do block allocation here. */ ret = block_prepare_write(page, 0, PAGE_CACHE_SIZE, - ext4_normal_get_block_write); + noalloc_get_block_write); if (!ret) { page_bufs = page_buffers(page); /* check whether all are mapped and non delay */ @@ -2461,11 +2619,10 @@ static int ext4_da_writepage(struct page *page, } if (test_opt(inode->i_sb, NOBH) && ext4_should_writeback_data(inode)) - ret = nobh_writepage(page, ext4_normal_get_block_write, wbc); + ret = nobh_writepage(page, noalloc_get_block_write, wbc); else - ret = block_write_full_page(page, - ext4_normal_get_block_write, - wbc); + ret = block_write_full_page(page, noalloc_get_block_write, + wbc); return ret; } @@ -2777,7 +2934,7 @@ static int ext4_da_write_begin(struct file *file, struct address_space *mapping, *pagep = page; ret = block_write_begin(file, mapping, pos, len, flags, pagep, fsdata, - ext4_da_get_block_prep); + ext4_da_get_block_prep); if (ret < 0) { unlock_page(page); ext4_journal_stop(handle); @@ -2815,7 +2972,7 @@ static int ext4_da_should_update_i_disksize(struct page *page, for (i = 0; i < idx; i++) bh = bh->b_this_page; - if (!buffer_mapped(bh) || (buffer_delay(bh))) + if (!buffer_mapped(bh) || (buffer_delay(bh)) || buffer_unwritten(bh)) return 0; return 1; } @@ -3085,12 +3242,10 @@ static int __ext4_normal_writepage(struct page *page, struct inode *inode = page->mapping->host; if (test_opt(inode->i_sb, NOBH)) - return nobh_writepage(page, - ext4_normal_get_block_write, wbc); + return nobh_writepage(page, noalloc_get_block_write, wbc); else - return block_write_full_page(page, - ext4_normal_get_block_write, - wbc); + return block_write_full_page(page, noalloc_get_block_write, + wbc); } static int ext4_normal_writepage(struct page *page, @@ -3142,7 +3297,7 @@ static int __ext4_journalled_writepage(struct page *page, int err; ret = block_prepare_write(page, 0, PAGE_CACHE_SIZE, - ext4_normal_get_block_write); + noalloc_get_block_write); if (ret != 0) goto out_unlock; @@ -3227,9 +3382,8 @@ static int ext4_journalled_writepage(struct page *page, * really know unless we go poke around in the buffer_heads. * But block_write_full_page will do the right thing. */ - return block_write_full_page(page, - ext4_normal_get_block_write, - wbc); + return block_write_full_page(page, noalloc_get_block_write, + wbc); } no_write: redirty_page_for_writepage(wbc, page); @@ -3973,7 +4127,8 @@ void ext4_truncate(struct inode *inode) if (!ext4_can_truncate(inode)) return; - if (inode->i_size == 0 && !test_opt(inode->i_sb, NO_AUTO_DA_ALLOC)) + if (ei->i_disksize && inode->i_size == 0 && + !test_opt(inode->i_sb, NO_AUTO_DA_ALLOC)) ei->i_state |= EXT4_STATE_DA_ALLOC_CLOSE; if (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL) { @@ -4715,25 +4870,6 @@ int ext4_write_inode(struct inode *inode, int wait) return ext4_force_commit(inode->i_sb); } -int __ext4_write_dirty_metadata(struct inode *inode, struct buffer_head *bh) -{ - int err = 0; - - mark_buffer_dirty(bh); - if (inode && inode_needs_sync(inode)) { - sync_dirty_buffer(bh); - if (buffer_req(bh) && !buffer_uptodate(bh)) { - ext4_error(inode->i_sb, __func__, - "IO error syncing inode, " - "inode=%lu, block=%llu", - inode->i_ino, - (unsigned long long)bh->b_blocknr); - err = -EIO; - } - } - return err; -} - /* * ext4_setattr() * @@ -4930,7 +5066,8 @@ static int ext4_index_trans_blocks(struct inode *inode, int nrblocks, int chunk) */ int ext4_meta_trans_blocks(struct inode *inode, int nrblocks, int chunk) { - int groups, gdpblocks; + ext4_group_t groups, ngroups = ext4_get_groups_count(inode->i_sb); + int gdpblocks; int idxblocks; int ret = 0; @@ -4957,8 +5094,8 @@ int ext4_meta_trans_blocks(struct inode *inode, int nrblocks, int chunk) groups += nrblocks; gdpblocks = groups; - if (groups > EXT4_SB(inode->i_sb)->s_groups_count) - groups = EXT4_SB(inode->i_sb)->s_groups_count; + if (groups > ngroups) + groups = ngroups; if (groups > EXT4_SB(inode->i_sb)->s_gdb_count) gdpblocks = EXT4_SB(inode->i_sb)->s_gdb_count; @@ -4998,7 +5135,7 @@ int ext4_writepage_trans_blocks(struct inode *inode) * Calculate the journal credits for a chunk of data modification. * * This is called from DIO, fallocate or whoever calling - * ext4_get_blocks_wrap() to map/allocate a chunk of contigous disk blocks. + * ext4_get_blocks() to map/allocate a chunk of contigous disk blocks. * * journal buffers for data blocks are not included here, as DIO * and fallocate do no need to journal data buffers. diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index f871677a7984..ed8482e22c0e 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -372,24 +372,12 @@ static inline void mb_set_bit(int bit, void *addr) ext4_set_bit(bit, addr); } -static inline void mb_set_bit_atomic(spinlock_t *lock, int bit, void *addr) -{ - addr = mb_correct_addr_and_bit(&bit, addr); - ext4_set_bit_atomic(lock, bit, addr); -} - static inline void mb_clear_bit(int bit, void *addr) { addr = mb_correct_addr_and_bit(&bit, addr); ext4_clear_bit(bit, addr); } -static inline void mb_clear_bit_atomic(spinlock_t *lock, int bit, void *addr) -{ - addr = mb_correct_addr_and_bit(&bit, addr); - ext4_clear_bit_atomic(lock, bit, addr); -} - static inline int mb_find_next_zero_bit(void *addr, int max, int start) { int fix = 0, ret, tmpmax; @@ -448,7 +436,7 @@ static void mb_free_blocks_double(struct inode *inode, struct ext4_buddy *e4b, if (unlikely(e4b->bd_info->bb_bitmap == NULL)) return; - BUG_ON(!ext4_is_group_locked(sb, e4b->bd_group)); + assert_spin_locked(ext4_group_lock_ptr(sb, e4b->bd_group)); for (i = 0; i < count; i++) { if (!mb_test_bit(first + i, e4b->bd_info->bb_bitmap)) { ext4_fsblk_t blocknr; @@ -472,7 +460,7 @@ static void mb_mark_used_double(struct ext4_buddy *e4b, int first, int count) if (unlikely(e4b->bd_info->bb_bitmap == NULL)) return; - BUG_ON(!ext4_is_group_locked(e4b->bd_sb, e4b->bd_group)); + assert_spin_locked(ext4_group_lock_ptr(e4b->bd_sb, e4b->bd_group)); for (i = 0; i < count; i++) { BUG_ON(mb_test_bit(first + i, e4b->bd_info->bb_bitmap)); mb_set_bit(first + i, e4b->bd_info->bb_bitmap); @@ -739,6 +727,7 @@ static void ext4_mb_generate_buddy(struct super_block *sb, static int ext4_mb_init_cache(struct page *page, char *incore) { + ext4_group_t ngroups; int blocksize; int blocks_per_page; int groups_per_page; @@ -757,6 +746,7 @@ static int ext4_mb_init_cache(struct page *page, char *incore) inode = page->mapping->host; sb = inode->i_sb; + ngroups = ext4_get_groups_count(sb); blocksize = 1 << inode->i_blkbits; blocks_per_page = PAGE_CACHE_SIZE / blocksize; @@ -780,7 +770,7 @@ static int ext4_mb_init_cache(struct page *page, char *incore) for (i = 0; i < groups_per_page; i++) { struct ext4_group_desc *desc; - if (first_group + i >= EXT4_SB(sb)->s_groups_count) + if (first_group + i >= ngroups) break; err = -EIO; @@ -801,17 +791,17 @@ static int ext4_mb_init_cache(struct page *page, char *incore) unlock_buffer(bh[i]); continue; } - spin_lock(sb_bgl_lock(EXT4_SB(sb), first_group + i)); + ext4_lock_group(sb, first_group + i); if (desc->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) { ext4_init_block_bitmap(sb, bh[i], first_group + i, desc); set_bitmap_uptodate(bh[i]); set_buffer_uptodate(bh[i]); - spin_unlock(sb_bgl_lock(EXT4_SB(sb), first_group + i)); + ext4_unlock_group(sb, first_group + i); unlock_buffer(bh[i]); continue; } - spin_unlock(sb_bgl_lock(EXT4_SB(sb), first_group + i)); + ext4_unlock_group(sb, first_group + i); if (buffer_uptodate(bh[i])) { /* * if not uninit if bh is uptodate, @@ -852,7 +842,7 @@ static int ext4_mb_init_cache(struct page *page, char *incore) struct ext4_group_info *grinfo; group = (first_block + i) >> 1; - if (group >= EXT4_SB(sb)->s_groups_count) + if (group >= ngroups) break; /* @@ -1078,7 +1068,7 @@ static int mb_find_order_for_block(struct ext4_buddy *e4b, int block) return 0; } -static void mb_clear_bits(spinlock_t *lock, void *bm, int cur, int len) +static void mb_clear_bits(void *bm, int cur, int len) { __u32 *addr; @@ -1091,15 +1081,12 @@ static void mb_clear_bits(spinlock_t *lock, void *bm, int cur, int len) cur += 32; continue; } - if (lock) - mb_clear_bit_atomic(lock, cur, bm); - else - mb_clear_bit(cur, bm); + mb_clear_bit(cur, bm); cur++; } } -static void mb_set_bits(spinlock_t *lock, void *bm, int cur, int len) +static void mb_set_bits(void *bm, int cur, int len) { __u32 *addr; @@ -1112,10 +1099,7 @@ static void mb_set_bits(spinlock_t *lock, void *bm, int cur, int len) cur += 32; continue; } - if (lock) - mb_set_bit_atomic(lock, cur, bm); - else - mb_set_bit(cur, bm); + mb_set_bit(cur, bm); cur++; } } @@ -1131,7 +1115,7 @@ static void mb_free_blocks(struct inode *inode, struct ext4_buddy *e4b, struct super_block *sb = e4b->bd_sb; BUG_ON(first + count > (sb->s_blocksize << 3)); - BUG_ON(!ext4_is_group_locked(sb, e4b->bd_group)); + assert_spin_locked(ext4_group_lock_ptr(sb, e4b->bd_group)); mb_check_buddy(e4b); mb_free_blocks_double(inode, e4b, first, count); @@ -1212,7 +1196,7 @@ static int mb_find_extent(struct ext4_buddy *e4b, int order, int block, int ord; void *buddy; - BUG_ON(!ext4_is_group_locked(e4b->bd_sb, e4b->bd_group)); + assert_spin_locked(ext4_group_lock_ptr(e4b->bd_sb, e4b->bd_group)); BUG_ON(ex == NULL); buddy = mb_find_buddy(e4b, order, &max); @@ -1276,7 +1260,7 @@ static int mb_mark_used(struct ext4_buddy *e4b, struct ext4_free_extent *ex) BUG_ON(start + len > (e4b->bd_sb->s_blocksize << 3)); BUG_ON(e4b->bd_group != ex->fe_group); - BUG_ON(!ext4_is_group_locked(e4b->bd_sb, e4b->bd_group)); + assert_spin_locked(ext4_group_lock_ptr(e4b->bd_sb, e4b->bd_group)); mb_check_buddy(e4b); mb_mark_used_double(e4b, start, len); @@ -1330,8 +1314,7 @@ static int mb_mark_used(struct ext4_buddy *e4b, struct ext4_free_extent *ex) e4b->bd_info->bb_counters[ord]++; } - mb_set_bits(sb_bgl_lock(EXT4_SB(e4b->bd_sb), ex->fe_group), - EXT4_MB_BITMAP(e4b), ex->fe_start, len0); + mb_set_bits(EXT4_MB_BITMAP(e4b), ex->fe_start, len0); mb_check_buddy(e4b); return ret; @@ -1726,7 +1709,6 @@ static int ext4_mb_good_group(struct ext4_allocation_context *ac, unsigned free, fragments; unsigned i, bits; int flex_size = ext4_flex_bg_size(EXT4_SB(ac->ac_sb)); - struct ext4_group_desc *desc; struct ext4_group_info *grp = ext4_get_group_info(ac->ac_sb, group); BUG_ON(cr < 0 || cr >= 4); @@ -1742,10 +1724,6 @@ static int ext4_mb_good_group(struct ext4_allocation_context *ac, switch (cr) { case 0: BUG_ON(ac->ac_2order == 0); - /* If this group is uninitialized, skip it initially */ - desc = ext4_get_group_desc(ac->ac_sb, group, NULL); - if (desc->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) - return 0; /* Avoid using the first bg of a flexgroup for data files */ if ((ac->ac_flags & EXT4_MB_HINT_DATA) && @@ -1788,6 +1766,7 @@ int ext4_mb_get_buddy_cache_lock(struct super_block *sb, ext4_group_t group) int block, pnum; int blocks_per_page; int groups_per_page; + ext4_group_t ngroups = ext4_get_groups_count(sb); ext4_group_t first_group; struct ext4_group_info *grp; @@ -1807,7 +1786,7 @@ int ext4_mb_get_buddy_cache_lock(struct super_block *sb, ext4_group_t group) /* read all groups the page covers into the cache */ for (i = 0; i < groups_per_page; i++) { - if ((first_group + i) >= EXT4_SB(sb)->s_groups_count) + if ((first_group + i) >= ngroups) break; grp = ext4_get_group_info(sb, first_group + i); /* take all groups write allocation @@ -1945,8 +1924,7 @@ static int ext4_mb_init_group(struct super_block *sb, ext4_group_t group) static noinline_for_stack int ext4_mb_regular_allocator(struct ext4_allocation_context *ac) { - ext4_group_t group; - ext4_group_t i; + ext4_group_t ngroups, group, i; int cr; int err = 0; int bsbits; @@ -1957,6 +1935,7 @@ ext4_mb_regular_allocator(struct ext4_allocation_context *ac) sb = ac->ac_sb; sbi = EXT4_SB(sb); + ngroups = ext4_get_groups_count(sb); BUG_ON(ac->ac_status == AC_STATUS_FOUND); /* first, try the goal */ @@ -2017,11 +1996,11 @@ ext4_mb_regular_allocator(struct ext4_allocation_context *ac) */ group = ac->ac_g_ex.fe_group; - for (i = 0; i < EXT4_SB(sb)->s_groups_count; group++, i++) { + for (i = 0; i < ngroups; group++, i++) { struct ext4_group_info *grp; struct ext4_group_desc *desc; - if (group == EXT4_SB(sb)->s_groups_count) + if (group == ngroups) group = 0; /* quick check to skip empty groups */ @@ -2064,9 +2043,7 @@ ext4_mb_regular_allocator(struct ext4_allocation_context *ac) ac->ac_groups_scanned++; desc = ext4_get_group_desc(sb, group, NULL); - if (cr == 0 || (desc->bg_flags & - cpu_to_le16(EXT4_BG_BLOCK_UNINIT) && - ac->ac_2order != 0)) + if (cr == 0) ext4_mb_simple_scan_group(ac, &e4b); else if (cr == 1 && ac->ac_g_ex.fe_len == sbi->s_stripe) @@ -2315,12 +2292,10 @@ static struct file_operations ext4_mb_seq_history_fops = { static void *ext4_mb_seq_groups_start(struct seq_file *seq, loff_t *pos) { struct super_block *sb = seq->private; - struct ext4_sb_info *sbi = EXT4_SB(sb); ext4_group_t group; - if (*pos < 0 || *pos >= sbi->s_groups_count) + if (*pos < 0 || *pos >= ext4_get_groups_count(sb)) return NULL; - group = *pos + 1; return (void *) ((unsigned long) group); } @@ -2328,11 +2303,10 @@ static void *ext4_mb_seq_groups_start(struct seq_file *seq, loff_t *pos) static void *ext4_mb_seq_groups_next(struct seq_file *seq, void *v, loff_t *pos) { struct super_block *sb = seq->private; - struct ext4_sb_info *sbi = EXT4_SB(sb); ext4_group_t group; ++*pos; - if (*pos < 0 || *pos >= sbi->s_groups_count) + if (*pos < 0 || *pos >= ext4_get_groups_count(sb)) return NULL; group = *pos + 1; return (void *) ((unsigned long) group); @@ -2420,7 +2394,8 @@ static void ext4_mb_history_release(struct super_block *sb) if (sbi->s_proc != NULL) { remove_proc_entry("mb_groups", sbi->s_proc); - remove_proc_entry("mb_history", sbi->s_proc); + if (sbi->s_mb_history_max) + remove_proc_entry("mb_history", sbi->s_proc); } kfree(sbi->s_mb_history); } @@ -2431,17 +2406,17 @@ static void ext4_mb_history_init(struct super_block *sb) int i; if (sbi->s_proc != NULL) { - proc_create_data("mb_history", S_IRUGO, sbi->s_proc, - &ext4_mb_seq_history_fops, sb); + if (sbi->s_mb_history_max) + proc_create_data("mb_history", S_IRUGO, sbi->s_proc, + &ext4_mb_seq_history_fops, sb); proc_create_data("mb_groups", S_IRUGO, sbi->s_proc, &ext4_mb_seq_groups_fops, sb); } - sbi->s_mb_history_max = 1000; sbi->s_mb_history_cur = 0; spin_lock_init(&sbi->s_mb_history_lock); i = sbi->s_mb_history_max * sizeof(struct ext4_mb_history); - sbi->s_mb_history = kzalloc(i, GFP_KERNEL); + sbi->s_mb_history = i ? kzalloc(i, GFP_KERNEL) : NULL; /* if we can't allocate history, then we simple won't use it */ } @@ -2451,7 +2426,7 @@ ext4_mb_store_history(struct ext4_allocation_context *ac) struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb); struct ext4_mb_history h; - if (unlikely(sbi->s_mb_history == NULL)) + if (sbi->s_mb_history == NULL) return; if (!(ac->ac_op & sbi->s_mb_history_filter)) @@ -2587,6 +2562,7 @@ void ext4_mb_update_group_info(struct ext4_group_info *grp, ext4_grpblk_t add) static int ext4_mb_init_backend(struct super_block *sb) { + ext4_group_t ngroups = ext4_get_groups_count(sb); ext4_group_t i; int metalen; struct ext4_sb_info *sbi = EXT4_SB(sb); @@ -2598,7 +2574,7 @@ static int ext4_mb_init_backend(struct super_block *sb) struct ext4_group_desc *desc; /* This is the number of blocks used by GDT */ - num_meta_group_infos = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - + num_meta_group_infos = (ngroups + EXT4_DESC_PER_BLOCK(sb) - 1) >> EXT4_DESC_PER_BLOCK_BITS(sb); /* @@ -2644,7 +2620,7 @@ static int ext4_mb_init_backend(struct super_block *sb) for (i = 0; i < num_meta_group_infos; i++) { if ((i + 1) == num_meta_group_infos) metalen = sizeof(*meta_group_info) * - (sbi->s_groups_count - + (ngroups - (i << EXT4_DESC_PER_BLOCK_BITS(sb))); meta_group_info = kmalloc(metalen, GFP_KERNEL); if (meta_group_info == NULL) { @@ -2655,7 +2631,7 @@ static int ext4_mb_init_backend(struct super_block *sb) sbi->s_group_info[i] = meta_group_info; } - for (i = 0; i < sbi->s_groups_count; i++) { + for (i = 0; i < ngroups; i++) { desc = ext4_get_group_desc(sb, i, NULL); if (desc == NULL) { printk(KERN_ERR @@ -2761,7 +2737,7 @@ int ext4_mb_init(struct super_block *sb, int needs_recovery) return 0; } -/* need to called with ext4 group lock (ext4_lock_group) */ +/* need to called with the ext4 group lock held */ static void ext4_mb_cleanup_pa(struct ext4_group_info *grp) { struct ext4_prealloc_space *pa; @@ -2781,13 +2757,14 @@ static void ext4_mb_cleanup_pa(struct ext4_group_info *grp) int ext4_mb_release(struct super_block *sb) { + ext4_group_t ngroups = ext4_get_groups_count(sb); ext4_group_t i; int num_meta_group_infos; struct ext4_group_info *grinfo; struct ext4_sb_info *sbi = EXT4_SB(sb); if (sbi->s_group_info) { - for (i = 0; i < sbi->s_groups_count; i++) { + for (i = 0; i < ngroups; i++) { grinfo = ext4_get_group_info(sb, i); #ifdef DOUBLE_CHECK kfree(grinfo->bb_bitmap); @@ -2797,7 +2774,7 @@ int ext4_mb_release(struct super_block *sb) ext4_unlock_group(sb, i); kfree(grinfo); } - num_meta_group_infos = (sbi->s_groups_count + + num_meta_group_infos = (ngroups + EXT4_DESC_PER_BLOCK(sb) - 1) >> EXT4_DESC_PER_BLOCK_BITS(sb); for (i = 0; i < num_meta_group_infos; i++) @@ -2984,27 +2961,25 @@ ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac, + le32_to_cpu(es->s_first_data_block); len = ac->ac_b_ex.fe_len; - if (in_range(ext4_block_bitmap(sb, gdp), block, len) || - in_range(ext4_inode_bitmap(sb, gdp), block, len) || - in_range(block, ext4_inode_table(sb, gdp), - EXT4_SB(sb)->s_itb_per_group) || - in_range(block + len - 1, ext4_inode_table(sb, gdp), - EXT4_SB(sb)->s_itb_per_group)) { + if (!ext4_data_block_valid(sbi, block, len)) { ext4_error(sb, __func__, - "Allocating block %llu in system zone of %d group\n", - block, ac->ac_b_ex.fe_group); + "Allocating blocks %llu-%llu which overlap " + "fs metadata\n", block, block+len); /* File system mounted not to panic on error * Fix the bitmap and repeat the block allocation * We leak some of the blocks here. */ - mb_set_bits(sb_bgl_lock(sbi, ac->ac_b_ex.fe_group), - bitmap_bh->b_data, ac->ac_b_ex.fe_start, - ac->ac_b_ex.fe_len); + ext4_lock_group(sb, ac->ac_b_ex.fe_group); + mb_set_bits(bitmap_bh->b_data, ac->ac_b_ex.fe_start, + ac->ac_b_ex.fe_len); + ext4_unlock_group(sb, ac->ac_b_ex.fe_group); err = ext4_handle_dirty_metadata(handle, NULL, bitmap_bh); if (!err) err = -EAGAIN; goto out_err; } + + ext4_lock_group(sb, ac->ac_b_ex.fe_group); #ifdef AGGRESSIVE_CHECK { int i; @@ -3014,9 +2989,7 @@ ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac, } } #endif - spin_lock(sb_bgl_lock(sbi, ac->ac_b_ex.fe_group)); - mb_set_bits(NULL, bitmap_bh->b_data, - ac->ac_b_ex.fe_start, ac->ac_b_ex.fe_len); + mb_set_bits(bitmap_bh->b_data, ac->ac_b_ex.fe_start,ac->ac_b_ex.fe_len); if (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) { gdp->bg_flags &= cpu_to_le16(~EXT4_BG_BLOCK_UNINIT); ext4_free_blks_set(sb, gdp, @@ -3026,7 +2999,8 @@ ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac, len = ext4_free_blks_count(sb, gdp) - ac->ac_b_ex.fe_len; ext4_free_blks_set(sb, gdp, len); gdp->bg_checksum = ext4_group_desc_csum(sbi, ac->ac_b_ex.fe_group, gdp); - spin_unlock(sb_bgl_lock(sbi, ac->ac_b_ex.fe_group)); + + ext4_unlock_group(sb, ac->ac_b_ex.fe_group); percpu_counter_sub(&sbi->s_freeblocks_counter, ac->ac_b_ex.fe_len); /* * Now reduce the dirty block count also. Should not go negative @@ -3459,7 +3433,7 @@ ext4_mb_use_preallocated(struct ext4_allocation_context *ac) * the function goes through all block freed in the group * but not yet committed and marks them used in in-core bitmap. * buddy must be generated from this bitmap - * Need to be called with ext4 group lock (ext4_lock_group) + * Need to be called with the ext4 group lock held */ static void ext4_mb_generate_from_freelist(struct super_block *sb, void *bitmap, ext4_group_t group) @@ -3473,9 +3447,7 @@ static void ext4_mb_generate_from_freelist(struct super_block *sb, void *bitmap, while (n) { entry = rb_entry(n, struct ext4_free_data, node); - mb_set_bits(sb_bgl_lock(EXT4_SB(sb), group), - bitmap, entry->start_blk, - entry->count); + mb_set_bits(bitmap, entry->start_blk, entry->count); n = rb_next(n); } return; @@ -3484,7 +3456,7 @@ static void ext4_mb_generate_from_freelist(struct super_block *sb, void *bitmap, /* * the function goes through all preallocation in this group and marks them * used in in-core bitmap. buddy must be generated from this bitmap - * Need to be called with ext4 group lock (ext4_lock_group) + * Need to be called with ext4 group lock held */ static void ext4_mb_generate_from_pa(struct super_block *sb, void *bitmap, ext4_group_t group) @@ -3516,8 +3488,7 @@ static void ext4_mb_generate_from_pa(struct super_block *sb, void *bitmap, if (unlikely(len == 0)) continue; BUG_ON(groupnr != group); - mb_set_bits(sb_bgl_lock(EXT4_SB(sb), group), - bitmap, start, len); + mb_set_bits(bitmap, start, len); preallocated += len; count++; } @@ -4121,7 +4092,7 @@ static void ext4_mb_return_to_preallocation(struct inode *inode, static void ext4_mb_show_ac(struct ext4_allocation_context *ac) { struct super_block *sb = ac->ac_sb; - ext4_group_t i; + ext4_group_t ngroups, i; printk(KERN_ERR "EXT4-fs: Can't allocate:" " Allocation context details:\n"); @@ -4145,7 +4116,8 @@ static void ext4_mb_show_ac(struct ext4_allocation_context *ac) printk(KERN_ERR "EXT4-fs: %lu scanned, %d found\n", ac->ac_ex_scanned, ac->ac_found); printk(KERN_ERR "EXT4-fs: groups: \n"); - for (i = 0; i < EXT4_SB(sb)->s_groups_count; i++) { + ngroups = ext4_get_groups_count(sb); + for (i = 0; i < ngroups; i++) { struct ext4_group_info *grp = ext4_get_group_info(sb, i); struct ext4_prealloc_space *pa; ext4_grpblk_t start; @@ -4469,13 +4441,13 @@ static int ext4_mb_release_context(struct ext4_allocation_context *ac) static int ext4_mb_discard_preallocations(struct super_block *sb, int needed) { - ext4_group_t i; + ext4_group_t i, ngroups = ext4_get_groups_count(sb); int ret; int freed = 0; trace_mark(ext4_mb_discard_preallocations, "dev %s needed %d", sb->s_id, needed); - for (i = 0; i < EXT4_SB(sb)->s_groups_count && needed > 0; i++) { + for (i = 0; i < ngroups && needed > 0; i++) { ret = ext4_mb_discard_group_preallocations(sb, i, needed); freed += ret; needed -= ret; @@ -4859,29 +4831,25 @@ void ext4_mb_free_blocks(handle_t *handle, struct inode *inode, new_entry->group = block_group; new_entry->count = count; new_entry->t_tid = handle->h_transaction->t_tid; + ext4_lock_group(sb, block_group); - mb_clear_bits(sb_bgl_lock(sbi, block_group), bitmap_bh->b_data, - bit, count); + mb_clear_bits(bitmap_bh->b_data, bit, count); ext4_mb_free_metadata(handle, &e4b, new_entry); - ext4_unlock_group(sb, block_group); } else { - ext4_lock_group(sb, block_group); /* need to update group_info->bb_free and bitmap * with group lock held. generate_buddy look at * them with group lock_held */ - mb_clear_bits(sb_bgl_lock(sbi, block_group), bitmap_bh->b_data, - bit, count); + ext4_lock_group(sb, block_group); + mb_clear_bits(bitmap_bh->b_data, bit, count); mb_free_blocks(inode, &e4b, bit, count); ext4_mb_return_to_preallocation(inode, &e4b, block, count); - ext4_unlock_group(sb, block_group); } - spin_lock(sb_bgl_lock(sbi, block_group)); ret = ext4_free_blks_count(sb, gdp) + count; ext4_free_blks_set(sb, gdp, ret); gdp->bg_checksum = ext4_group_desc_csum(sbi, block_group, gdp); - spin_unlock(sb_bgl_lock(sbi, block_group)); + ext4_unlock_group(sb, block_group); percpu_counter_add(&sbi->s_freeblocks_counter, count); if (sbi->s_log_groups_per_flex) { diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h index dd9e6cd5f6cf..75e34f69215b 100644 --- a/fs/ext4/mballoc.h +++ b/fs/ext4/mballoc.h @@ -23,7 +23,6 @@ #include #include "ext4_jbd2.h" #include "ext4.h" -#include "group.h" /* * with AGGRESSIVE_CHECK allocator runs consistency checks over diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 22098e1cd085..07eb6649e4fa 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -37,7 +37,6 @@ #include "ext4.h" #include "ext4_jbd2.h" -#include "namei.h" #include "xattr.h" #include "acl.h" @@ -750,7 +749,7 @@ static int dx_make_map(struct ext4_dir_entry_2 *de, unsigned blocksize, ext4fs_dirhash(de->name, de->name_len, &h); map_tail--; map_tail->hash = h.hash; - map_tail->offs = (u16) ((char *) de - base); + map_tail->offs = ((char *) de - base)>>2; map_tail->size = le16_to_cpu(de->rec_len); count++; cond_resched(); @@ -1148,7 +1147,8 @@ dx_move_dirents(char *from, char *to, struct dx_map_entry *map, int count, unsigned rec_len = 0; while (count--) { - struct ext4_dir_entry_2 *de = (struct ext4_dir_entry_2 *) (from + map->offs); + struct ext4_dir_entry_2 *de = (struct ext4_dir_entry_2 *) + (from + (map->offs<<2)); rec_len = EXT4_DIR_REC_LEN(de->name_len); memcpy (to, de, rec_len); ((struct ext4_dir_entry_2 *) to)->rec_len = @@ -1997,7 +1997,7 @@ int ext4_orphan_add(handle_t *handle, struct inode *inode) if (!ext4_handle_valid(handle)) return 0; - lock_super(sb); + mutex_lock(&EXT4_SB(sb)->s_orphan_lock); if (!list_empty(&EXT4_I(inode)->i_orphan)) goto out_unlock; @@ -2006,9 +2006,13 @@ int ext4_orphan_add(handle_t *handle, struct inode *inode) /* @@@ FIXME: Observation from aviro: * I think I can trigger J_ASSERT in ext4_orphan_add(). We block - * here (on lock_super()), so race with ext4_link() which might bump + * here (on s_orphan_lock), so race with ext4_link() which might bump * ->i_nlink. For, say it, character device. Not a regular file, * not a directory, not a symlink and ->i_nlink > 0. + * + * tytso, 4/25/2009: I'm not sure how that could happen; + * shouldn't the fs core protect us from these sort of + * unlink()/link() races? */ J_ASSERT((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) || inode->i_nlink == 0); @@ -2045,7 +2049,7 @@ int ext4_orphan_add(handle_t *handle, struct inode *inode) jbd_debug(4, "orphan inode %lu will point to %d\n", inode->i_ino, NEXT_ORPHAN(inode)); out_unlock: - unlock_super(sb); + mutex_unlock(&EXT4_SB(sb)->s_orphan_lock); ext4_std_error(inode->i_sb, err); return err; } @@ -2066,11 +2070,9 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode) if (!ext4_handle_valid(handle)) return 0; - lock_super(inode->i_sb); - if (list_empty(&ei->i_orphan)) { - unlock_super(inode->i_sb); - return 0; - } + mutex_lock(&EXT4_SB(inode->i_sb)->s_orphan_lock); + if (list_empty(&ei->i_orphan)) + goto out; ino_next = NEXT_ORPHAN(inode); prev = ei->i_orphan.prev; @@ -2120,7 +2122,7 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode) out_err: ext4_std_error(inode->i_sb, err); out: - unlock_super(inode->i_sb); + mutex_unlock(&EXT4_SB(inode->i_sb)->s_orphan_lock); return err; out_brelse: @@ -2533,6 +2535,7 @@ const struct inode_operations ext4_dir_inode_operations = { .removexattr = generic_removexattr, #endif .permission = ext4_permission, + .fiemap = ext4_fiemap, }; const struct inode_operations ext4_special_inode_operations = { diff --git a/fs/ext4/namei.h b/fs/ext4/namei.h deleted file mode 100644 index 5e4dfff36a00..000000000000 --- a/fs/ext4/namei.h +++ /dev/null @@ -1,8 +0,0 @@ -/* linux/fs/ext4/namei.h - * - * Copyright (C) 2005 Simtec Electronics - * Ben Dooks - * -*/ - -extern struct dentry *ext4_get_parent(struct dentry *child); diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c index 546c7dd869e1..27eb289eea37 100644 --- a/fs/ext4/resize.c +++ b/fs/ext4/resize.c @@ -15,7 +15,6 @@ #include #include "ext4_jbd2.h" -#include "group.h" #define outside(b, first, last) ((b) < (first) || (b) >= (last)) #define inside(b, first, last) ((b) >= (first) && (b) < (last)) @@ -193,7 +192,7 @@ static int setup_new_group_blocks(struct super_block *sb, if (IS_ERR(handle)) return PTR_ERR(handle); - lock_super(sb); + mutex_lock(&sbi->s_resize_lock); if (input->group != sbi->s_groups_count) { err = -EBUSY; goto exit_journal; @@ -302,7 +301,7 @@ static int setup_new_group_blocks(struct super_block *sb, brelse(bh); exit_journal: - unlock_super(sb); + mutex_unlock(&sbi->s_resize_lock); if ((err2 = ext4_journal_stop(handle)) && !err) err = err2; @@ -643,11 +642,12 @@ static int reserve_backup_gdb(handle_t *handle, struct inode *inode, * important part is that the new block and inode counts are in the backup * superblocks, and the location of the new group metadata in the GDT backups. * - * We do not need lock_super() for this, because these blocks are not - * otherwise touched by the filesystem code when it is mounted. We don't - * need to worry about last changing from sbi->s_groups_count, because the - * worst that can happen is that we do not copy the full number of backups - * at this time. The resize which changed s_groups_count will backup again. + * We do not need take the s_resize_lock for this, because these + * blocks are not otherwise touched by the filesystem code when it is + * mounted. We don't need to worry about last changing from + * sbi->s_groups_count, because the worst that can happen is that we + * do not copy the full number of backups at this time. The resize + * which changed s_groups_count will backup again. */ static void update_backups(struct super_block *sb, int blk_off, char *data, int size) @@ -809,7 +809,7 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input) goto exit_put; } - lock_super(sb); + mutex_lock(&sbi->s_resize_lock); if (input->group != sbi->s_groups_count) { ext4_warning(sb, __func__, "multiple resizers run on filesystem!"); @@ -840,7 +840,7 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input) /* * OK, now we've set up the new group. Time to make it active. * - * Current kernels don't lock all allocations via lock_super(), + * We do not lock all allocations via s_resize_lock * so we have to be safe wrt. concurrent accesses the group * data. So we need to be careful to set all of the relevant * group descriptor data etc. *before* we enable the group. @@ -900,12 +900,12 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input) * * The precise rules we use are: * - * * Writers of s_groups_count *must* hold lock_super + * * Writers of s_groups_count *must* hold s_resize_lock * AND * * Writers must perform a smp_wmb() after updating all dependent * data and before modifying the groups count * - * * Readers must hold lock_super() over the access + * * Readers must hold s_resize_lock over the access * OR * * Readers must perform an smp_rmb() after reading the groups count * and before reading any dependent data. @@ -948,7 +948,7 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input) sb->s_dirt = 1; exit_journal: - unlock_super(sb); + mutex_unlock(&sbi->s_resize_lock); if ((err2 = ext4_journal_stop(handle)) && !err) err = err2; if (!err) { @@ -986,7 +986,7 @@ int ext4_group_extend(struct super_block *sb, struct ext4_super_block *es, /* We don't need to worry about locking wrt other resizers just * yet: we're going to revalidate es->s_blocks_count after - * taking lock_super() below. */ + * taking the s_resize_lock below. */ o_blocks_count = ext4_blocks_count(es); o_groups_count = EXT4_SB(sb)->s_groups_count; @@ -1056,11 +1056,11 @@ int ext4_group_extend(struct super_block *sb, struct ext4_super_block *es, goto exit_put; } - lock_super(sb); + mutex_lock(&EXT4_SB(sb)->s_resize_lock); if (o_blocks_count != ext4_blocks_count(es)) { ext4_warning(sb, __func__, "multiple resizers run on filesystem!"); - unlock_super(sb); + mutex_unlock(&EXT4_SB(sb)->s_resize_lock); ext4_journal_stop(handle); err = -EBUSY; goto exit_put; @@ -1070,14 +1070,14 @@ int ext4_group_extend(struct super_block *sb, struct ext4_super_block *es, EXT4_SB(sb)->s_sbh))) { ext4_warning(sb, __func__, "error %d on journal write access", err); - unlock_super(sb); + mutex_unlock(&EXT4_SB(sb)->s_resize_lock); ext4_journal_stop(handle); goto exit_put; } ext4_blocks_count_set(es, o_blocks_count + add); ext4_handle_dirty_metadata(handle, NULL, EXT4_SB(sb)->s_sbh); sb->s_dirt = 1; - unlock_super(sb); + mutex_unlock(&EXT4_SB(sb)->s_resize_lock); ext4_debug("freeing blocks %llu through %llu\n", o_blocks_count, o_blocks_count + add); /* We add the blocks to the bitmap and set the group need init bit */ diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 2958f4e6f222..c191d0f65fed 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include #include @@ -45,16 +46,20 @@ #include "ext4_jbd2.h" #include "xattr.h" #include "acl.h" -#include "namei.h" -#include "group.h" + +static int default_mb_history_length = 1000; + +module_param_named(default_mb_history_length, default_mb_history_length, + int, 0644); +MODULE_PARM_DESC(default_mb_history_length, + "Default number of entries saved for mb_history"); struct proc_dir_entry *ext4_proc_root; static struct kset *ext4_kset; static int ext4_load_journal(struct super_block *, struct ext4_super_block *, unsigned long journal_devnum); -static int ext4_commit_super(struct super_block *sb, - struct ext4_super_block *es, int sync); +static int ext4_commit_super(struct super_block *sb, int sync); static void ext4_mark_recovery_complete(struct super_block *sb, struct ext4_super_block *es); static void ext4_clear_journal_err(struct super_block *sb, @@ -74,7 +79,7 @@ ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, { return le32_to_cpu(bg->bg_block_bitmap_lo) | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? - (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); + (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); } ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, @@ -82,7 +87,7 @@ ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, { return le32_to_cpu(bg->bg_inode_bitmap_lo) | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? - (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); + (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); } ext4_fsblk_t ext4_inode_table(struct super_block *sb, @@ -90,7 +95,7 @@ ext4_fsblk_t ext4_inode_table(struct super_block *sb, { return le32_to_cpu(bg->bg_inode_table_lo) | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? - (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); + (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); } __u32 ext4_free_blks_count(struct super_block *sb, @@ -98,7 +103,7 @@ __u32 ext4_free_blks_count(struct super_block *sb, { return le16_to_cpu(bg->bg_free_blocks_count_lo) | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? - (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); + (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); } __u32 ext4_free_inodes_count(struct super_block *sb, @@ -106,7 +111,7 @@ __u32 ext4_free_inodes_count(struct super_block *sb, { return le16_to_cpu(bg->bg_free_inodes_count_lo) | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? - (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); + (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); } __u32 ext4_used_dirs_count(struct super_block *sb, @@ -114,7 +119,7 @@ __u32 ext4_used_dirs_count(struct super_block *sb, { return le16_to_cpu(bg->bg_used_dirs_count_lo) | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? - (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); + (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); } __u32 ext4_itable_unused_count(struct super_block *sb, @@ -122,7 +127,7 @@ __u32 ext4_itable_unused_count(struct super_block *sb, { return le16_to_cpu(bg->bg_itable_unused_lo) | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? - (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); + (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); } void ext4_block_bitmap_set(struct super_block *sb, @@ -202,8 +207,7 @@ handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) journal = EXT4_SB(sb)->s_journal; if (journal) { if (is_journal_aborted(journal)) { - ext4_abort(sb, __func__, - "Detected aborted journal"); + ext4_abort(sb, __func__, "Detected aborted journal"); return ERR_PTR(-EROFS); } return jbd2_journal_start(journal, nblocks); @@ -302,10 +306,10 @@ static void ext4_handle_error(struct super_block *sb) jbd2_journal_abort(journal, -EIO); } if (test_opt(sb, ERRORS_RO)) { - printk(KERN_CRIT "Remounting filesystem read-only\n"); + ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); sb->s_flags |= MS_RDONLY; } - ext4_commit_super(sb, es, 1); + ext4_commit_super(sb, 1); if (test_opt(sb, ERRORS_PANIC)) panic("EXT4-fs (device %s): panic forced after error\n", sb->s_id); @@ -395,8 +399,6 @@ void ext4_abort(struct super_block *sb, const char *function, { va_list args; - printk(KERN_CRIT "ext4_abort called.\n"); - va_start(args, fmt); printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); vprintk(fmt, args); @@ -409,7 +411,7 @@ void ext4_abort(struct super_block *sb, const char *function, if (sb->s_flags & MS_RDONLY) return; - printk(KERN_CRIT "Remounting filesystem read-only\n"); + ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; sb->s_flags |= MS_RDONLY; EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; @@ -417,6 +419,18 @@ void ext4_abort(struct super_block *sb, const char *function, jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); } +void ext4_msg (struct super_block * sb, const char *prefix, + const char *fmt, ...) +{ + va_list args; + + va_start(args, fmt); + printk("%sEXT4-fs (%s): ", prefix, sb->s_id); + vprintk(fmt, args); + printk("\n"); + va_end(args); +} + void ext4_warning(struct super_block *sb, const char *function, const char *fmt, ...) { @@ -431,7 +445,7 @@ void ext4_warning(struct super_block *sb, const char *function, } void ext4_grp_locked_error(struct super_block *sb, ext4_group_t grp, - const char *function, const char *fmt, ...) + const char *function, const char *fmt, ...) __releases(bitlock) __acquires(bitlock) { @@ -447,7 +461,7 @@ __acquires(bitlock) if (test_opt(sb, ERRORS_CONT)) { EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; es->s_state |= cpu_to_le16(EXT4_ERROR_FS); - ext4_commit_super(sb, es, 0); + ext4_commit_super(sb, 0); return; } ext4_unlock_group(sb, grp); @@ -467,7 +481,6 @@ __acquires(bitlock) return; } - void ext4_update_dynamic_rev(struct super_block *sb) { struct ext4_super_block *es = EXT4_SB(sb)->s_es; @@ -496,7 +509,7 @@ void ext4_update_dynamic_rev(struct super_block *sb) /* * Open the external journal device */ -static struct block_device *ext4_blkdev_get(dev_t dev) +static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) { struct block_device *bdev; char b[BDEVNAME_SIZE]; @@ -507,7 +520,7 @@ static struct block_device *ext4_blkdev_get(dev_t dev) return bdev; fail: - printk(KERN_ERR "EXT4-fs: failed to open journal device %s: %ld\n", + ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", __bdevname(dev, b), PTR_ERR(bdev)); return NULL; } @@ -543,8 +556,8 @@ static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) { struct list_head *l; - printk(KERN_ERR "sb orphan head is %d\n", - le32_to_cpu(sbi->s_es->s_last_orphan)); + ext4_msg(sb, KERN_ERR, "sb orphan head is %d", + le32_to_cpu(sbi->s_es->s_last_orphan)); printk(KERN_ERR "sb_info orphan list:\n"); list_for_each(l, &sbi->s_orphan) { @@ -563,6 +576,7 @@ static void ext4_put_super(struct super_block *sb) struct ext4_super_block *es = sbi->s_es; int i, err; + ext4_release_system_zone(sb); ext4_mb_release(sb); ext4_ext_release(sb); ext4_xattr_put_super(sb); @@ -576,7 +590,7 @@ static void ext4_put_super(struct super_block *sb) if (!(sb->s_flags & MS_RDONLY)) { EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); es->s_state = cpu_to_le16(sbi->s_mount_state); - ext4_commit_super(sb, es, 1); + ext4_commit_super(sb, 1); } if (sbi->s_proc) { remove_proc_entry(sb->s_id, ext4_proc_root); @@ -586,7 +600,10 @@ static void ext4_put_super(struct super_block *sb) for (i = 0; i < sbi->s_gdb_count; i++) brelse(sbi->s_group_desc[i]); kfree(sbi->s_group_desc); - kfree(sbi->s_flex_groups); + if (is_vmalloc_addr(sbi->s_flex_groups)) + vfree(sbi->s_flex_groups); + else + kfree(sbi->s_flex_groups); percpu_counter_destroy(&sbi->s_freeblocks_counter); percpu_counter_destroy(&sbi->s_freeinodes_counter); percpu_counter_destroy(&sbi->s_dirs_counter); @@ -629,7 +646,6 @@ static void ext4_put_super(struct super_block *sb) lock_kernel(); kfree(sbi->s_blockgroup_lock); kfree(sbi); - return; } static struct kmem_cache *ext4_inode_cachep; @@ -644,6 +660,7 @@ static struct inode *ext4_alloc_inode(struct super_block *sb) ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); if (!ei) return NULL; + #ifdef CONFIG_EXT4_FS_POSIX_ACL ei->i_acl = EXT4_ACL_NOT_CACHED; ei->i_default_acl = EXT4_ACL_NOT_CACHED; @@ -664,14 +681,16 @@ static struct inode *ext4_alloc_inode(struct super_block *sb) ei->i_allocated_meta_blocks = 0; ei->i_delalloc_reserved_flag = 0; spin_lock_init(&(ei->i_block_reservation_lock)); + return &ei->vfs_inode; } static void ext4_destroy_inode(struct inode *inode) { if (!list_empty(&(EXT4_I(inode)->i_orphan))) { - printk("EXT4 Inode %p: orphan list check failed!\n", - EXT4_I(inode)); + ext4_msg(inode->i_sb, KERN_ERR, + "Inode %lu (%p): orphan list check failed!", + inode->i_ino, EXT4_I(inode)); print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, EXT4_I(inode), sizeof(struct ext4_inode_info), true); @@ -870,12 +889,12 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) seq_puts(seq, ",noauto_da_alloc"); ext4_show_quota_options(seq, sb); + return 0; } - static struct inode *ext4_nfs_get_inode(struct super_block *sb, - u64 ino, u32 generation) + u64 ino, u32 generation) { struct inode *inode; @@ -904,14 +923,14 @@ static struct inode *ext4_nfs_get_inode(struct super_block *sb, } static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, - int fh_len, int fh_type) + int fh_len, int fh_type) { return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ext4_nfs_get_inode); } static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, - int fh_len, int fh_type) + int fh_len, int fh_type) { return generic_fh_to_parent(sb, fid, fh_len, fh_type, ext4_nfs_get_inode); @@ -923,7 +942,8 @@ static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, * which would prevent try_to_free_buffers() from freeing them, we must use * jbd2 layer's try_to_free_buffers() function to release them. */ -static int bdev_try_to_free_page(struct super_block *sb, struct page *page, gfp_t wait) +static int bdev_try_to_free_page(struct super_block *sb, struct page *page, + gfp_t wait) { journal_t *journal = EXT4_SB(sb)->s_journal; @@ -992,7 +1012,6 @@ static const struct super_operations ext4_sops = { .dirty_inode = ext4_dirty_inode, .delete_inode = ext4_delete_inode, .put_super = ext4_put_super, - .write_super = ext4_write_super, .sync_fs = ext4_sync_fs, .freeze_fs = ext4_freeze, .unfreeze_fs = ext4_unfreeze, @@ -1007,6 +1026,25 @@ static const struct super_operations ext4_sops = { .bdev_try_to_free_page = bdev_try_to_free_page, }; +static const struct super_operations ext4_nojournal_sops = { + .alloc_inode = ext4_alloc_inode, + .destroy_inode = ext4_destroy_inode, + .write_inode = ext4_write_inode, + .dirty_inode = ext4_dirty_inode, + .delete_inode = ext4_delete_inode, + .write_super = ext4_write_super, + .put_super = ext4_put_super, + .statfs = ext4_statfs, + .remount_fs = ext4_remount, + .clear_inode = ext4_clear_inode, + .show_options = ext4_show_options, +#ifdef CONFIG_QUOTA + .quota_read = ext4_quota_read, + .quota_write = ext4_quota_write, +#endif + .bdev_try_to_free_page = bdev_try_to_free_page, +}; + static const struct export_operations ext4_export_ops = { .fh_to_dentry = ext4_fh_to_dentry, .fh_to_parent = ext4_fh_to_parent, @@ -1023,12 +1061,13 @@ enum { Opt_journal_update, Opt_journal_dev, Opt_journal_checksum, Opt_journal_async_commit, Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, - Opt_data_err_abort, Opt_data_err_ignore, + Opt_data_err_abort, Opt_data_err_ignore, Opt_mb_history_length, Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, Opt_stripe, Opt_delalloc, Opt_nodelalloc, + Opt_block_validity, Opt_noblock_validity, Opt_inode_readahead_blks, Opt_journal_ioprio }; @@ -1069,6 +1108,7 @@ static const match_table_t tokens = { {Opt_data_writeback, "data=writeback"}, {Opt_data_err_abort, "data_err=abort"}, {Opt_data_err_ignore, "data_err=ignore"}, + {Opt_mb_history_length, "mb_history_length=%u"}, {Opt_offusrjquota, "usrjquota="}, {Opt_usrjquota, "usrjquota=%s"}, {Opt_offgrpjquota, "grpjquota="}, @@ -1087,6 +1127,8 @@ static const match_table_t tokens = { {Opt_resize, "resize"}, {Opt_delalloc, "delalloc"}, {Opt_nodelalloc, "nodelalloc"}, + {Opt_block_validity, "block_validity"}, + {Opt_noblock_validity, "noblock_validity"}, {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, {Opt_journal_ioprio, "journal_ioprio=%u"}, {Opt_auto_da_alloc, "auto_da_alloc=%u"}, @@ -1102,8 +1144,9 @@ static ext4_fsblk_t get_sb_block(void **data) if (!options || strncmp(options, "sb=", 3) != 0) return 1; /* Default location */ + options += 3; - /*todo: use simple_strtoll with >32bit ext4 */ + /* TODO: use simple_strtoll with >32bit ext4 */ sb_block = simple_strtoul(options, &options, 0); if (*options && *options != ',') { printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", @@ -1113,6 +1156,7 @@ static ext4_fsblk_t get_sb_block(void **data) if (*options == ',') options++; *data = (void *) options; + return sb_block; } @@ -1206,8 +1250,7 @@ static int parse_options(char *options, struct super_block *sb, #else case Opt_user_xattr: case Opt_nouser_xattr: - printk(KERN_ERR "EXT4 (no)user_xattr options " - "not supported\n"); + ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); break; #endif #ifdef CONFIG_EXT4_FS_POSIX_ACL @@ -1220,8 +1263,7 @@ static int parse_options(char *options, struct super_block *sb, #else case Opt_acl: case Opt_noacl: - printk(KERN_ERR "EXT4 (no)acl options " - "not supported\n"); + ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); break; #endif case Opt_journal_update: @@ -1231,16 +1273,16 @@ static int parse_options(char *options, struct super_block *sb, user to specify an existing inode to be the journal file. */ if (is_remount) { - printk(KERN_ERR "EXT4-fs: cannot specify " - "journal on remount\n"); + ext4_msg(sb, KERN_ERR, + "Cannot specify journal on remount"); return 0; } set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); break; case Opt_journal_dev: if (is_remount) { - printk(KERN_ERR "EXT4-fs: cannot specify " - "journal on remount\n"); + ext4_msg(sb, KERN_ERR, + "Cannot specify journal on remount"); return 0; } if (match_int(&args[0], &option)) @@ -1294,9 +1336,8 @@ static int parse_options(char *options, struct super_block *sb, if (is_remount) { if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) != data_opt) { - printk(KERN_ERR - "EXT4-fs: cannot change data " - "mode on remount\n"); + ext4_msg(sb, KERN_ERR, + "Cannot change data mode on remount"); return 0; } } else { @@ -1310,6 +1351,13 @@ static int parse_options(char *options, struct super_block *sb, case Opt_data_err_ignore: clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); break; + case Opt_mb_history_length: + if (match_int(&args[0], &option)) + return 0; + if (option < 0) + return 0; + sbi->s_mb_history_max = option; + break; #ifdef CONFIG_QUOTA case Opt_usrjquota: qtype = USRQUOTA; @@ -1319,31 +1367,31 @@ static int parse_options(char *options, struct super_block *sb, set_qf_name: if (sb_any_quota_loaded(sb) && !sbi->s_qf_names[qtype]) { - printk(KERN_ERR - "EXT4-fs: Cannot change journaled " - "quota options when quota turned on.\n"); + ext4_msg(sb, KERN_ERR, + "Cannot change journaled " + "quota options when quota turned on"); return 0; } qname = match_strdup(&args[0]); if (!qname) { - printk(KERN_ERR - "EXT4-fs: not enough memory for " - "storing quotafile name.\n"); + ext4_msg(sb, KERN_ERR, + "Not enough memory for " + "storing quotafile name"); return 0; } if (sbi->s_qf_names[qtype] && strcmp(sbi->s_qf_names[qtype], qname)) { - printk(KERN_ERR - "EXT4-fs: %s quota file already " - "specified.\n", QTYPE2NAME(qtype)); + ext4_msg(sb, KERN_ERR, + "%s quota file already " + "specified", QTYPE2NAME(qtype)); kfree(qname); return 0; } sbi->s_qf_names[qtype] = qname; if (strchr(sbi->s_qf_names[qtype], '/')) { - printk(KERN_ERR - "EXT4-fs: quotafile must be on " - "filesystem root.\n"); + ext4_msg(sb, KERN_ERR, + "quotafile must be on " + "filesystem root"); kfree(sbi->s_qf_names[qtype]); sbi->s_qf_names[qtype] = NULL; return 0; @@ -1358,9 +1406,9 @@ static int parse_options(char *options, struct super_block *sb, clear_qf_name: if (sb_any_quota_loaded(sb) && sbi->s_qf_names[qtype]) { - printk(KERN_ERR "EXT4-fs: Cannot change " + ext4_msg(sb, KERN_ERR, "Cannot change " "journaled quota options when " - "quota turned on.\n"); + "quota turned on"); return 0; } /* @@ -1377,9 +1425,9 @@ static int parse_options(char *options, struct super_block *sb, set_qf_format: if (sb_any_quota_loaded(sb) && sbi->s_jquota_fmt != qfmt) { - printk(KERN_ERR "EXT4-fs: Cannot change " + ext4_msg(sb, KERN_ERR, "Cannot change " "journaled quota options when " - "quota turned on.\n"); + "quota turned on"); return 0; } sbi->s_jquota_fmt = qfmt; @@ -1395,8 +1443,8 @@ static int parse_options(char *options, struct super_block *sb, break; case Opt_noquota: if (sb_any_quota_loaded(sb)) { - printk(KERN_ERR "EXT4-fs: Cannot change quota " - "options when quota turned on.\n"); + ext4_msg(sb, KERN_ERR, "Cannot change quota " + "options when quota turned on"); return 0; } clear_opt(sbi->s_mount_opt, QUOTA); @@ -1407,8 +1455,8 @@ static int parse_options(char *options, struct super_block *sb, case Opt_quota: case Opt_usrquota: case Opt_grpquota: - printk(KERN_ERR - "EXT4-fs: quota options not supported.\n"); + ext4_msg(sb, KERN_ERR, + "quota options not supported"); break; case Opt_usrjquota: case Opt_grpjquota: @@ -1416,9 +1464,8 @@ static int parse_options(char *options, struct super_block *sb, case Opt_offgrpjquota: case Opt_jqfmt_vfsold: case Opt_jqfmt_vfsv0: - printk(KERN_ERR - "EXT4-fs: journaled quota options not " - "supported.\n"); + ext4_msg(sb, KERN_ERR, + "journaled quota options not supported"); break; case Opt_noquota: break; @@ -1443,8 +1490,9 @@ static int parse_options(char *options, struct super_block *sb, break; case Opt_resize: if (!is_remount) { - printk("EXT4-fs: resize option only available " - "for remount\n"); + ext4_msg(sb, KERN_ERR, + "resize option only available " + "for remount"); return 0; } if (match_int(&args[0], &option) != 0) @@ -1474,14 +1522,21 @@ static int parse_options(char *options, struct super_block *sb, case Opt_delalloc: set_opt(sbi->s_mount_opt, DELALLOC); break; + case Opt_block_validity: + set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); + break; + case Opt_noblock_validity: + clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY); + break; case Opt_inode_readahead_blks: if (match_int(&args[0], &option)) return 0; if (option < 0 || option > (1 << 30)) return 0; - if (option & (option - 1)) { - printk(KERN_ERR "EXT4-fs: inode_readahead_blks" - " must be a power of 2\n"); + if (!is_power_of_2(option)) { + ext4_msg(sb, KERN_ERR, + "EXT4-fs: inode_readahead_blks" + " must be a power of 2"); return 0; } sbi->s_inode_readahead_blks = option; @@ -1508,9 +1563,9 @@ static int parse_options(char *options, struct super_block *sb, set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); break; default: - printk(KERN_ERR - "EXT4-fs: Unrecognized mount option \"%s\" " - "or missing value\n", p); + ext4_msg(sb, KERN_ERR, + "Unrecognized mount option \"%s\" " + "or missing value", p); return 0; } } @@ -1528,21 +1583,21 @@ static int parse_options(char *options, struct super_block *sb, (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || (sbi->s_qf_names[GRPQUOTA] && (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { - printk(KERN_ERR "EXT4-fs: old and new quota " - "format mixing.\n"); + ext4_msg(sb, KERN_ERR, "old and new quota " + "format mixing"); return 0; } if (!sbi->s_jquota_fmt) { - printk(KERN_ERR "EXT4-fs: journaled quota format " - "not specified.\n"); + ext4_msg(sb, KERN_ERR, "journaled quota format " + "not specified"); return 0; } } else { if (sbi->s_jquota_fmt) { - printk(KERN_ERR "EXT4-fs: journaled quota format " + ext4_msg(sb, KERN_ERR, "journaled quota format " "specified with no journaling " - "enabled.\n"); + "enabled"); return 0; } } @@ -1557,32 +1612,32 @@ static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, int res = 0; if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { - printk(KERN_ERR "EXT4-fs warning: revision level too high, " - "forcing read-only mode\n"); + ext4_msg(sb, KERN_ERR, "revision level too high, " + "forcing read-only mode"); res = MS_RDONLY; } if (read_only) return res; if (!(sbi->s_mount_state & EXT4_VALID_FS)) - printk(KERN_WARNING "EXT4-fs warning: mounting unchecked fs, " - "running e2fsck is recommended\n"); + ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " + "running e2fsck is recommended"); else if ((sbi->s_mount_state & EXT4_ERROR_FS)) - printk(KERN_WARNING - "EXT4-fs warning: mounting fs with errors, " - "running e2fsck is recommended\n"); + ext4_msg(sb, KERN_WARNING, + "warning: mounting fs with errors, " + "running e2fsck is recommended"); else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && le16_to_cpu(es->s_mnt_count) >= (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) - printk(KERN_WARNING - "EXT4-fs warning: maximal mount count reached, " - "running e2fsck is recommended\n"); + ext4_msg(sb, KERN_WARNING, + "warning: maximal mount count reached, " + "running e2fsck is recommended"); else if (le32_to_cpu(es->s_checkinterval) && (le32_to_cpu(es->s_lastcheck) + le32_to_cpu(es->s_checkinterval) <= get_seconds())) - printk(KERN_WARNING - "EXT4-fs warning: checktime reached, " - "running e2fsck is recommended\n"); - if (!sbi->s_journal) + ext4_msg(sb, KERN_WARNING, + "warning: checktime reached, " + "running e2fsck is recommended"); + if (!sbi->s_journal) es->s_state &= cpu_to_le16(~EXT4_VALID_FS); if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); @@ -1592,7 +1647,7 @@ static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, if (sbi->s_journal) EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); - ext4_commit_super(sb, es, 1); + ext4_commit_super(sb, 1); if (test_opt(sb, DEBUG)) printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " "bpg=%lu, ipg=%lu, mo=%04lx]\n", @@ -1603,11 +1658,11 @@ static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, sbi->s_mount_opt); if (EXT4_SB(sb)->s_journal) { - printk(KERN_INFO "EXT4 FS on %s, %s journal on %s\n", - sb->s_id, EXT4_SB(sb)->s_journal->j_inode ? "internal" : + ext4_msg(sb, KERN_INFO, "%s journal on %s", + EXT4_SB(sb)->s_journal->j_inode ? "internal" : "external", EXT4_SB(sb)->s_journal->j_devname); } else { - printk(KERN_INFO "EXT4 FS on %s, no journal\n", sb->s_id); + ext4_msg(sb, KERN_INFO, "no journal"); } return res; } @@ -1616,10 +1671,10 @@ static int ext4_fill_flex_info(struct super_block *sb) { struct ext4_sb_info *sbi = EXT4_SB(sb); struct ext4_group_desc *gdp = NULL; - struct buffer_head *bh; ext4_group_t flex_group_count; ext4_group_t flex_group; int groups_per_flex = 0; + size_t size; int i; if (!sbi->s_es->s_log_groups_per_flex) { @@ -1634,16 +1689,21 @@ static int ext4_fill_flex_info(struct super_block *sb) flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; - sbi->s_flex_groups = kzalloc(flex_group_count * - sizeof(struct flex_groups), GFP_KERNEL); + size = flex_group_count * sizeof(struct flex_groups); + sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); if (sbi->s_flex_groups == NULL) { - printk(KERN_ERR "EXT4-fs: not enough memory for " - "%u flex groups\n", flex_group_count); + sbi->s_flex_groups = vmalloc(size); + if (sbi->s_flex_groups) + memset(sbi->s_flex_groups, 0, size); + } + if (sbi->s_flex_groups == NULL) { + ext4_msg(sb, KERN_ERR, "not enough memory for " + "%u flex groups", flex_group_count); goto failed; } for (i = 0; i < sbi->s_groups_count; i++) { - gdp = ext4_get_group_desc(sb, i, &bh); + gdp = ext4_get_group_desc(sb, i, NULL); flex_group = ext4_flex_group(sbi, i); atomic_set(&sbi->s_flex_groups[flex_group].free_inodes, @@ -1724,44 +1784,44 @@ static int ext4_check_descriptors(struct super_block *sb) block_bitmap = ext4_block_bitmap(sb, gdp); if (block_bitmap < first_block || block_bitmap > last_block) { - printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " + ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " "Block bitmap for group %u not in group " - "(block %llu)!\n", i, block_bitmap); + "(block %llu)!", i, block_bitmap); return 0; } inode_bitmap = ext4_inode_bitmap(sb, gdp); if (inode_bitmap < first_block || inode_bitmap > last_block) { - printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " + ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " "Inode bitmap for group %u not in group " - "(block %llu)!\n", i, inode_bitmap); + "(block %llu)!", i, inode_bitmap); return 0; } inode_table = ext4_inode_table(sb, gdp); if (inode_table < first_block || inode_table + sbi->s_itb_per_group - 1 > last_block) { - printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " + ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " "Inode table for group %u not in group " - "(block %llu)!\n", i, inode_table); + "(block %llu)!", i, inode_table); return 0; } - spin_lock(sb_bgl_lock(sbi, i)); + ext4_lock_group(sb, i); if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { - printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " - "Checksum for group %u failed (%u!=%u)\n", - i, le16_to_cpu(ext4_group_desc_csum(sbi, i, - gdp)), le16_to_cpu(gdp->bg_checksum)); + ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " + "Checksum for group %u failed (%u!=%u)", + i, le16_to_cpu(ext4_group_desc_csum(sbi, i, + gdp)), le16_to_cpu(gdp->bg_checksum)); if (!(sb->s_flags & MS_RDONLY)) { - spin_unlock(sb_bgl_lock(sbi, i)); + ext4_unlock_group(sb, i); return 0; } } - spin_unlock(sb_bgl_lock(sbi, i)); + ext4_unlock_group(sb, i); if (!flexbg_flag) first_block += EXT4_BLOCKS_PER_GROUP(sb); } ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); - sbi->s_es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); + sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); return 1; } @@ -1796,8 +1856,8 @@ static void ext4_orphan_cleanup(struct super_block *sb, } if (bdev_read_only(sb->s_bdev)) { - printk(KERN_ERR "EXT4-fs: write access " - "unavailable, skipping orphan cleanup.\n"); + ext4_msg(sb, KERN_ERR, "write access " + "unavailable, skipping orphan cleanup"); return; } @@ -1811,8 +1871,7 @@ static void ext4_orphan_cleanup(struct super_block *sb, } if (s_flags & MS_RDONLY) { - printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n", - sb->s_id); + ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); sb->s_flags &= ~MS_RDONLY; } #ifdef CONFIG_QUOTA @@ -1823,9 +1882,9 @@ static void ext4_orphan_cleanup(struct super_block *sb, if (EXT4_SB(sb)->s_qf_names[i]) { int ret = ext4_quota_on_mount(sb, i); if (ret < 0) - printk(KERN_ERR - "EXT4-fs: Cannot turn on journaled " - "quota: error %d\n", ret); + ext4_msg(sb, KERN_ERR, + "Cannot turn on journaled " + "quota: error %d", ret); } } #endif @@ -1842,16 +1901,16 @@ static void ext4_orphan_cleanup(struct super_block *sb, list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); vfs_dq_init(inode); if (inode->i_nlink) { - printk(KERN_DEBUG - "%s: truncating inode %lu to %lld bytes\n", + ext4_msg(sb, KERN_DEBUG, + "%s: truncating inode %lu to %lld bytes", __func__, inode->i_ino, inode->i_size); jbd_debug(2, "truncating inode %lu to %lld bytes\n", inode->i_ino, inode->i_size); ext4_truncate(inode); nr_truncates++; } else { - printk(KERN_DEBUG - "%s: deleting unreferenced inode %lu\n", + ext4_msg(sb, KERN_DEBUG, + "%s: deleting unreferenced inode %lu", __func__, inode->i_ino); jbd_debug(2, "deleting unreferenced inode %lu\n", inode->i_ino); @@ -1863,11 +1922,11 @@ static void ext4_orphan_cleanup(struct super_block *sb, #define PLURAL(x) (x), ((x) == 1) ? "" : "s" if (nr_orphans) - printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n", - sb->s_id, PLURAL(nr_orphans)); + ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", + PLURAL(nr_orphans)); if (nr_truncates) - printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n", - sb->s_id, PLURAL(nr_truncates)); + ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", + PLURAL(nr_truncates)); #ifdef CONFIG_QUOTA /* Turn quotas off */ for (i = 0; i < MAXQUOTAS; i++) { @@ -1877,6 +1936,7 @@ static void ext4_orphan_cleanup(struct super_block *sb, #endif sb->s_flags = s_flags; /* Restore MS_RDONLY status */ } + /* * Maximal extent format file size. * Resulting logical blkno at s_maxbytes must fit in our on-disk @@ -1927,19 +1987,19 @@ static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) loff_t res = EXT4_NDIR_BLOCKS; int meta_blocks; loff_t upper_limit; - /* This is calculated to be the largest file size for a - * dense, bitmapped file such that the total number of - * sectors in the file, including data and all indirect blocks, - * does not exceed 2^48 -1 - * __u32 i_blocks_lo and _u16 i_blocks_high representing the - * total number of 512 bytes blocks of the file + /* This is calculated to be the largest file size for a dense, block + * mapped file such that the file's total number of 512-byte sectors, + * including data and all indirect blocks, does not exceed (2^48 - 1). + * + * __u32 i_blocks_lo and _u16 i_blocks_high represent the total + * number of 512-byte sectors of the file. */ if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { /* - * !has_huge_files or CONFIG_LBD is not enabled - * implies the inode i_block represent total blocks in - * 512 bytes 32 == size of vfs inode i_blocks * 8 + * !has_huge_files or CONFIG_LBD not enabled implies that + * the inode i_block field represents total file blocks in + * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 */ upper_limit = (1LL << 32) - 1; @@ -1981,7 +2041,7 @@ static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) } static ext4_fsblk_t descriptor_loc(struct super_block *sb, - ext4_fsblk_t logical_sb_block, int nr) + ext4_fsblk_t logical_sb_block, int nr) { struct ext4_sb_info *sbi = EXT4_SB(sb); ext4_group_t bg, first_meta_bg; @@ -1995,6 +2055,7 @@ static ext4_fsblk_t descriptor_loc(struct super_block *sb, bg = sbi->s_desc_per_block * nr; if (ext4_bg_has_super(sb, bg)) has_super = 1; + return (has_super + ext4_group_first_block_no(sb, bg)); } @@ -2091,8 +2152,7 @@ static ssize_t inode_readahead_blks_store(struct ext4_attr *a, if (parse_strtoul(buf, 0x40000000, &t)) return -EINVAL; - /* inode_readahead_blks must be a power of 2 */ - if (t & (t-1)) + if (!is_power_of_2(t)) return -EINVAL; sbi->s_inode_readahead_blks = t; @@ -2100,7 +2160,7 @@ static ssize_t inode_readahead_blks_store(struct ext4_attr *a, } static ssize_t sbi_ui_show(struct ext4_attr *a, - struct ext4_sb_info *sbi, char *buf) + struct ext4_sb_info *sbi, char *buf) { unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); @@ -2205,7 +2265,6 @@ static struct kobj_type ext4_ktype = { static int ext4_fill_super(struct super_block *sb, void *data, int silent) __releases(kernel_lock) __acquires(kernel_lock) - { struct buffer_head *bh; struct ext4_super_block *es = NULL; @@ -2256,7 +2315,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); if (!blocksize) { - printk(KERN_ERR "EXT4-fs: unable to set blocksize\n"); + ext4_msg(sb, KERN_ERR, "unable to set blocksize"); goto out_fail; } @@ -2272,7 +2331,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) } if (!(bh = sb_bread(sb, logical_sb_block))) { - printk(KERN_ERR "EXT4-fs: unable to read superblock\n"); + ext4_msg(sb, KERN_ERR, "unable to read superblock"); goto out_fail; } /* @@ -2321,6 +2380,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; + sbi->s_mb_history_max = default_mb_history_length; set_opt(sbi->s_mount_opt, BARRIER); @@ -2330,7 +2390,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) */ set_opt(sbi->s_mount_opt, DELALLOC); - if (!parse_options((char *) data, sb, &journal_devnum, &journal_ioprio, NULL, 0)) goto failed_mount; @@ -2342,9 +2401,9 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) - printk(KERN_WARNING - "EXT4-fs warning: feature flags set on rev 0 fs, " - "running e2fsck is recommended\n"); + ext4_msg(sb, KERN_WARNING, + "feature flags set on rev 0 fs, " + "running e2fsck is recommended"); /* * Check feature flags regardless of the revision level, since we @@ -2353,16 +2412,18 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) */ features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); if (features) { - printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of " - "unsupported optional features (%x).\n", sb->s_id, + ext4_msg(sb, KERN_ERR, + "Couldn't mount because of " + "unsupported optional features (%x)", (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & ~EXT4_FEATURE_INCOMPAT_SUPP)); goto failed_mount; } features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); if (!(sb->s_flags & MS_RDONLY) && features) { - printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of " - "unsupported optional features (%x).\n", sb->s_id, + ext4_msg(sb, KERN_ERR, + "Couldn't mount RDWR because of " + "unsupported optional features (%x)", (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & ~EXT4_FEATURE_RO_COMPAT_SUPP)); goto failed_mount; @@ -2376,9 +2437,9 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) */ if (sizeof(root->i_blocks) < sizeof(u64) && !(sb->s_flags & MS_RDONLY)) { - printk(KERN_ERR "EXT4-fs: %s: Filesystem with huge " + ext4_msg(sb, KERN_ERR, "Filesystem with huge " "files cannot be mounted read-write " - "without CONFIG_LBD.\n", sb->s_id); + "without CONFIG_LBD"); goto failed_mount; } } @@ -2386,17 +2447,15 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) if (blocksize < EXT4_MIN_BLOCK_SIZE || blocksize > EXT4_MAX_BLOCK_SIZE) { - printk(KERN_ERR - "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n", - blocksize, sb->s_id); + ext4_msg(sb, KERN_ERR, + "Unsupported filesystem blocksize %d", blocksize); goto failed_mount; } if (sb->s_blocksize != blocksize) { - /* Validate the filesystem blocksize */ if (!sb_set_blocksize(sb, blocksize)) { - printk(KERN_ERR "EXT4-fs: bad block size %d.\n", + ext4_msg(sb, KERN_ERR, "bad block size %d", blocksize); goto failed_mount; } @@ -2406,15 +2465,15 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) offset = do_div(logical_sb_block, blocksize); bh = sb_bread(sb, logical_sb_block); if (!bh) { - printk(KERN_ERR - "EXT4-fs: Can't read superblock on 2nd try.\n"); + ext4_msg(sb, KERN_ERR, + "Can't read superblock on 2nd try"); goto failed_mount; } es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); sbi->s_es = es; if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { - printk(KERN_ERR - "EXT4-fs: Magic mismatch, very weird !\n"); + ext4_msg(sb, KERN_ERR, + "Magic mismatch, very weird!"); goto failed_mount; } } @@ -2432,30 +2491,33 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || (!is_power_of_2(sbi->s_inode_size)) || (sbi->s_inode_size > blocksize)) { - printk(KERN_ERR - "EXT4-fs: unsupported inode size: %d\n", + ext4_msg(sb, KERN_ERR, + "unsupported inode size: %d", sbi->s_inode_size); goto failed_mount; } if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); } + sbi->s_desc_size = le16_to_cpu(es->s_desc_size); if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || sbi->s_desc_size > EXT4_MAX_DESC_SIZE || !is_power_of_2(sbi->s_desc_size)) { - printk(KERN_ERR - "EXT4-fs: unsupported descriptor size %lu\n", + ext4_msg(sb, KERN_ERR, + "unsupported descriptor size %lu", sbi->s_desc_size); goto failed_mount; } } else sbi->s_desc_size = EXT4_MIN_DESC_SIZE; + sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) goto cantfind_ext4; + sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); if (sbi->s_inodes_per_block == 0) goto cantfind_ext4; @@ -2466,6 +2528,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) sbi->s_mount_state = le16_to_cpu(es->s_state); sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); + for (i = 0; i < 4; i++) sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); sbi->s_def_hash_version = es->s_def_hash_version; @@ -2483,25 +2546,24 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) } if (sbi->s_blocks_per_group > blocksize * 8) { - printk(KERN_ERR - "EXT4-fs: #blocks per group too big: %lu\n", + ext4_msg(sb, KERN_ERR, + "#blocks per group too big: %lu", sbi->s_blocks_per_group); goto failed_mount; } if (sbi->s_inodes_per_group > blocksize * 8) { - printk(KERN_ERR - "EXT4-fs: #inodes per group too big: %lu\n", + ext4_msg(sb, KERN_ERR, + "#inodes per group too big: %lu", sbi->s_inodes_per_group); goto failed_mount; } if (ext4_blocks_count(es) > (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { - printk(KERN_ERR "EXT4-fs: filesystem on %s:" - " too large to mount safely\n", sb->s_id); + ext4_msg(sb, KERN_ERR, "filesystem" + " too large to mount safely"); if (sizeof(sector_t) < 8) - printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not " - "enabled\n"); + ext4_msg(sb, KERN_WARNING, "CONFIG_LBD not enabled"); goto failed_mount; } @@ -2511,21 +2573,21 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) /* check blocks count against device size */ blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; if (blocks_count && ext4_blocks_count(es) > blocks_count) { - printk(KERN_WARNING "EXT4-fs: bad geometry: block count %llu " - "exceeds size of device (%llu blocks)\n", + ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " + "exceeds size of device (%llu blocks)", ext4_blocks_count(es), blocks_count); goto failed_mount; } - /* - * It makes no sense for the first data block to be beyond the end - * of the filesystem. - */ - if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { - printk(KERN_WARNING "EXT4-fs: bad geometry: first data" - "block %u is beyond end of filesystem (%llu)\n", - le32_to_cpu(es->s_first_data_block), - ext4_blocks_count(es)); + /* + * It makes no sense for the first data block to be beyond the end + * of the filesystem. + */ + if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { + ext4_msg(sb, KERN_WARNING, "bad geometry: first data" + "block %u is beyond end of filesystem (%llu)", + le32_to_cpu(es->s_first_data_block), + ext4_blocks_count(es)); goto failed_mount; } blocks_count = (ext4_blocks_count(es) - @@ -2533,9 +2595,9 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) EXT4_BLOCKS_PER_GROUP(sb) - 1); do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { - printk(KERN_WARNING "EXT4-fs: groups count too large: %u " + ext4_msg(sb, KERN_WARNING, "groups count too large: %u " "(block count %llu, first data block %u, " - "blocks per group %lu)\n", sbi->s_groups_count, + "blocks per group %lu)", sbi->s_groups_count, ext4_blocks_count(es), le32_to_cpu(es->s_first_data_block), EXT4_BLOCKS_PER_GROUP(sb)); @@ -2547,7 +2609,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), GFP_KERNEL); if (sbi->s_group_desc == NULL) { - printk(KERN_ERR "EXT4-fs: not enough memory\n"); + ext4_msg(sb, KERN_ERR, "not enough memory"); goto failed_mount; } @@ -2562,21 +2624,21 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) block = descriptor_loc(sb, logical_sb_block, i); sbi->s_group_desc[i] = sb_bread(sb, block); if (!sbi->s_group_desc[i]) { - printk(KERN_ERR "EXT4-fs: " - "can't read group descriptor %d\n", i); + ext4_msg(sb, KERN_ERR, + "can't read group descriptor %d", i); db_count = i; goto failed_mount2; } } if (!ext4_check_descriptors(sb)) { - printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n"); + ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); goto failed_mount2; } if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) if (!ext4_fill_flex_info(sb)) { - printk(KERN_ERR - "EXT4-fs: unable to initialize " - "flex_bg meta info!\n"); + ext4_msg(sb, KERN_ERR, + "unable to initialize " + "flex_bg meta info!"); goto failed_mount2; } @@ -2598,7 +2660,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); } if (err) { - printk(KERN_ERR "EXT4-fs: insufficient memory\n"); + ext4_msg(sb, KERN_ERR, "insufficient memory"); goto failed_mount3; } @@ -2607,7 +2669,11 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) /* * set up enough so that it can read an inode */ - sb->s_op = &ext4_sops; + if (!test_opt(sb, NOLOAD) && + EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) + sb->s_op = &ext4_sops; + else + sb->s_op = &ext4_nojournal_sops; sb->s_export_op = &ext4_export_ops; sb->s_xattr = ext4_xattr_handlers; #ifdef CONFIG_QUOTA @@ -2615,6 +2681,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) sb->dq_op = &ext4_quota_operations; #endif INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ + mutex_init(&sbi->s_orphan_lock); + mutex_init(&sbi->s_resize_lock); sb->s_root = NULL; @@ -2632,13 +2700,13 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) goto failed_mount3; if (!(sb->s_flags & MS_RDONLY) && EXT4_SB(sb)->s_journal->j_failed_commit) { - printk(KERN_CRIT "EXT4-fs error (device %s): " + ext4_msg(sb, KERN_CRIT, "error: " "ext4_fill_super: Journal transaction " - "%u is corrupt\n", sb->s_id, + "%u is corrupt", EXT4_SB(sb)->s_journal->j_failed_commit); if (test_opt(sb, ERRORS_RO)) { - printk(KERN_CRIT - "Mounting filesystem read-only\n"); + ext4_msg(sb, KERN_CRIT, + "Mounting filesystem read-only"); sb->s_flags |= MS_RDONLY; EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; es->s_state |= cpu_to_le16(EXT4_ERROR_FS); @@ -2646,14 +2714,14 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) if (test_opt(sb, ERRORS_PANIC)) { EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; es->s_state |= cpu_to_le16(EXT4_ERROR_FS); - ext4_commit_super(sb, es, 1); + ext4_commit_super(sb, 1); goto failed_mount4; } } } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { - printk(KERN_ERR "EXT4-fs: required journal recovery " - "suppressed and not mounted read-only\n"); + ext4_msg(sb, KERN_ERR, "required journal recovery " + "suppressed and not mounted read-only"); goto failed_mount4; } else { clear_opt(sbi->s_mount_opt, DATA_FLAGS); @@ -2666,7 +2734,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) if (ext4_blocks_count(es) > 0xffffffffULL && !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_64BIT)) { - printk(KERN_ERR "EXT4-fs: Failed to set 64-bit journal feature\n"); + ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); goto failed_mount4; } @@ -2704,8 +2772,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) case EXT4_MOUNT_WRITEBACK_DATA: if (!jbd2_journal_check_available_features (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { - printk(KERN_ERR "EXT4-fs: Journal does not support " - "requested data journaling mode\n"); + ext4_msg(sb, KERN_ERR, "Journal does not support " + "requested data journaling mode"); goto failed_mount4; } default: @@ -2717,8 +2785,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) if (test_opt(sb, NOBH)) { if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { - printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - " - "its supported only with writeback mode\n"); + ext4_msg(sb, KERN_WARNING, "Ignoring nobh option - " + "its supported only with writeback mode"); clear_opt(sbi->s_mount_opt, NOBH); } } @@ -2729,18 +2797,18 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) root = ext4_iget(sb, EXT4_ROOT_INO); if (IS_ERR(root)) { - printk(KERN_ERR "EXT4-fs: get root inode failed\n"); + ext4_msg(sb, KERN_ERR, "get root inode failed"); ret = PTR_ERR(root); goto failed_mount4; } if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { iput(root); - printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n"); + ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); goto failed_mount4; } sb->s_root = d_alloc_root(root); if (!sb->s_root) { - printk(KERN_ERR "EXT4-fs: get root dentry failed\n"); + ext4_msg(sb, KERN_ERR, "get root dentry failed"); iput(root); ret = -ENOMEM; goto failed_mount4; @@ -2769,22 +2837,29 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) sbi->s_inode_size) { sbi->s_want_extra_isize = sizeof(struct ext4_inode) - EXT4_GOOD_OLD_INODE_SIZE; - printk(KERN_INFO "EXT4-fs: required extra inode space not" - "available.\n"); + ext4_msg(sb, KERN_INFO, "required extra inode space not" + "available"); } if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { - printk(KERN_WARNING "EXT4-fs: Ignoring delalloc option - " - "requested data journaling mode\n"); + ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " + "requested data journaling mode"); clear_opt(sbi->s_mount_opt, DELALLOC); } else if (test_opt(sb, DELALLOC)) - printk(KERN_INFO "EXT4-fs: delayed allocation enabled\n"); + ext4_msg(sb, KERN_INFO, "delayed allocation enabled"); + + err = ext4_setup_system_zone(sb); + if (err) { + ext4_msg(sb, KERN_ERR, "failed to initialize system " + "zone (%d)\n", err); + goto failed_mount4; + } ext4_ext_init(sb); err = ext4_mb_init(sb, needs_recovery); if (err) { - printk(KERN_ERR "EXT4-fs: failed to initalize mballoc (%d)\n", - err); + ext4_msg(sb, KERN_ERR, "failed to initalize mballoc (%d)", + err); goto failed_mount4; } @@ -2798,19 +2873,11 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) goto failed_mount4; }; - /* - * akpm: core read_super() calls in here with the superblock locked. - * That deadlocks, because orphan cleanup needs to lock the superblock - * in numerous places. Here we just pop the lock - it's relatively - * harmless, because we are now ready to accept write_super() requests, - * and aviro says that's the only reason for hanging onto the - * superblock lock. - */ EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; ext4_orphan_cleanup(sb, es); EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; if (needs_recovery) { - printk(KERN_INFO "EXT4-fs: recovery complete.\n"); + ext4_msg(sb, KERN_INFO, "recovery complete"); ext4_mark_recovery_complete(sb, es); } if (EXT4_SB(sb)->s_journal) { @@ -2823,25 +2890,30 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) } else descr = "out journal"; - printk(KERN_INFO "EXT4-fs: mounted filesystem %s with%s\n", - sb->s_id, descr); + ext4_msg(sb, KERN_INFO, "mounted filesystem with%s", descr); lock_kernel(); return 0; cantfind_ext4: if (!silent) - printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n", - sb->s_id); + ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); goto failed_mount; failed_mount4: - printk(KERN_ERR "EXT4-fs (device %s): mount failed\n", sb->s_id); + ext4_msg(sb, KERN_ERR, "mount failed"); + ext4_release_system_zone(sb); if (sbi->s_journal) { jbd2_journal_destroy(sbi->s_journal); sbi->s_journal = NULL; } failed_mount3: + if (sbi->s_flex_groups) { + if (is_vmalloc_addr(sbi->s_flex_groups)) + vfree(sbi->s_flex_groups); + else + kfree(sbi->s_flex_groups); + } percpu_counter_destroy(&sbi->s_freeblocks_counter); percpu_counter_destroy(&sbi->s_freeinodes_counter); percpu_counter_destroy(&sbi->s_dirs_counter); @@ -2862,6 +2934,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) brelse(bh); out_fail: sb->s_fs_info = NULL; + kfree(sbi->s_blockgroup_lock); kfree(sbi); lock_kernel(); return ret; @@ -2906,27 +2979,27 @@ static journal_t *ext4_get_journal(struct super_block *sb, journal_inode = ext4_iget(sb, journal_inum); if (IS_ERR(journal_inode)) { - printk(KERN_ERR "EXT4-fs: no journal found.\n"); + ext4_msg(sb, KERN_ERR, "no journal found"); return NULL; } if (!journal_inode->i_nlink) { make_bad_inode(journal_inode); iput(journal_inode); - printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n"); + ext4_msg(sb, KERN_ERR, "journal inode is deleted"); return NULL; } jbd_debug(2, "Journal inode found at %p: %lld bytes\n", journal_inode, journal_inode->i_size); if (!S_ISREG(journal_inode->i_mode)) { - printk(KERN_ERR "EXT4-fs: invalid journal inode.\n"); + ext4_msg(sb, KERN_ERR, "invalid journal inode"); iput(journal_inode); return NULL; } journal = jbd2_journal_init_inode(journal_inode); if (!journal) { - printk(KERN_ERR "EXT4-fs: Could not load journal inode\n"); + ext4_msg(sb, KERN_ERR, "Could not load journal inode"); iput(journal_inode); return NULL; } @@ -2950,13 +3023,13 @@ static journal_t *ext4_get_dev_journal(struct super_block *sb, BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); - bdev = ext4_blkdev_get(j_dev); + bdev = ext4_blkdev_get(j_dev, sb); if (bdev == NULL) return NULL; if (bd_claim(bdev, sb)) { - printk(KERN_ERR - "EXT4-fs: failed to claim external journal device.\n"); + ext4_msg(sb, KERN_ERR, + "failed to claim external journal device"); blkdev_put(bdev, FMODE_READ|FMODE_WRITE); return NULL; } @@ -2964,8 +3037,8 @@ static journal_t *ext4_get_dev_journal(struct super_block *sb, blocksize = sb->s_blocksize; hblock = bdev_hardsect_size(bdev); if (blocksize < hblock) { - printk(KERN_ERR - "EXT4-fs: blocksize too small for journal device.\n"); + ext4_msg(sb, KERN_ERR, + "blocksize too small for journal device"); goto out_bdev; } @@ -2973,8 +3046,8 @@ static journal_t *ext4_get_dev_journal(struct super_block *sb, offset = EXT4_MIN_BLOCK_SIZE % blocksize; set_blocksize(bdev, blocksize); if (!(bh = __bread(bdev, sb_block, blocksize))) { - printk(KERN_ERR "EXT4-fs: couldn't read superblock of " - "external journal\n"); + ext4_msg(sb, KERN_ERR, "couldn't read superblock of " + "external journal"); goto out_bdev; } @@ -2982,14 +3055,14 @@ static journal_t *ext4_get_dev_journal(struct super_block *sb, if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || !(le32_to_cpu(es->s_feature_incompat) & EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { - printk(KERN_ERR "EXT4-fs: external journal has " - "bad superblock\n"); + ext4_msg(sb, KERN_ERR, "external journal has " + "bad superblock"); brelse(bh); goto out_bdev; } if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { - printk(KERN_ERR "EXT4-fs: journal UUID does not match\n"); + ext4_msg(sb, KERN_ERR, "journal UUID does not match"); brelse(bh); goto out_bdev; } @@ -3001,25 +3074,26 @@ static journal_t *ext4_get_dev_journal(struct super_block *sb, journal = jbd2_journal_init_dev(bdev, sb->s_bdev, start, len, blocksize); if (!journal) { - printk(KERN_ERR "EXT4-fs: failed to create device journal\n"); + ext4_msg(sb, KERN_ERR, "failed to create device journal"); goto out_bdev; } journal->j_private = sb; ll_rw_block(READ, 1, &journal->j_sb_buffer); wait_on_buffer(journal->j_sb_buffer); if (!buffer_uptodate(journal->j_sb_buffer)) { - printk(KERN_ERR "EXT4-fs: I/O error on journal device\n"); + ext4_msg(sb, KERN_ERR, "I/O error on journal device"); goto out_journal; } if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { - printk(KERN_ERR "EXT4-fs: External journal has more than one " - "user (unsupported) - %d\n", + ext4_msg(sb, KERN_ERR, "External journal has more than one " + "user (unsupported) - %d", be32_to_cpu(journal->j_superblock->s_nr_users)); goto out_journal; } EXT4_SB(sb)->journal_bdev = bdev; ext4_init_journal_params(sb, journal); return journal; + out_journal: jbd2_journal_destroy(journal); out_bdev: @@ -3041,8 +3115,8 @@ static int ext4_load_journal(struct super_block *sb, if (journal_devnum && journal_devnum != le32_to_cpu(es->s_journal_dev)) { - printk(KERN_INFO "EXT4-fs: external journal device major/minor " - "numbers have changed\n"); + ext4_msg(sb, KERN_INFO, "external journal device major/minor " + "numbers have changed"); journal_dev = new_decode_dev(journal_devnum); } else journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); @@ -3054,24 +3128,23 @@ static int ext4_load_journal(struct super_block *sb, * crash? For recovery, we need to check in advance whether we * can get read-write access to the device. */ - if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { if (sb->s_flags & MS_RDONLY) { - printk(KERN_INFO "EXT4-fs: INFO: recovery " - "required on readonly filesystem.\n"); + ext4_msg(sb, KERN_INFO, "INFO: recovery " + "required on readonly filesystem"); if (really_read_only) { - printk(KERN_ERR "EXT4-fs: write access " - "unavailable, cannot proceed.\n"); + ext4_msg(sb, KERN_ERR, "write access " + "unavailable, cannot proceed"); return -EROFS; } - printk(KERN_INFO "EXT4-fs: write access will " - "be enabled during recovery.\n"); + ext4_msg(sb, KERN_INFO, "write access will " + "be enabled during recovery"); } } if (journal_inum && journal_dev) { - printk(KERN_ERR "EXT4-fs: filesystem has both journal " - "and inode journals!\n"); + ext4_msg(sb, KERN_ERR, "filesystem has both journal " + "and inode journals!"); return -EINVAL; } @@ -3084,14 +3157,14 @@ static int ext4_load_journal(struct super_block *sb, } if (journal->j_flags & JBD2_BARRIER) - printk(KERN_INFO "EXT4-fs: barriers enabled\n"); + ext4_msg(sb, KERN_INFO, "barriers enabled"); else - printk(KERN_INFO "EXT4-fs: barriers disabled\n"); + ext4_msg(sb, KERN_INFO, "barriers disabled"); if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { err = jbd2_journal_update_format(journal); if (err) { - printk(KERN_ERR "EXT4-fs: error updating journal.\n"); + ext4_msg(sb, KERN_ERR, "error updating journal"); jbd2_journal_destroy(journal); return err; } @@ -3103,7 +3176,7 @@ static int ext4_load_journal(struct super_block *sb, err = jbd2_journal_load(journal); if (err) { - printk(KERN_ERR "EXT4-fs: error loading journal.\n"); + ext4_msg(sb, KERN_ERR, "error loading journal"); jbd2_journal_destroy(journal); return err; } @@ -3114,18 +3187,17 @@ static int ext4_load_journal(struct super_block *sb, if (journal_devnum && journal_devnum != le32_to_cpu(es->s_journal_dev)) { es->s_journal_dev = cpu_to_le32(journal_devnum); - sb->s_dirt = 1; /* Make sure we flush the recovery flag to disk. */ - ext4_commit_super(sb, es, 1); + ext4_commit_super(sb, 1); } return 0; } -static int ext4_commit_super(struct super_block *sb, - struct ext4_super_block *es, int sync) +static int ext4_commit_super(struct super_block *sb, int sync) { + struct ext4_super_block *es = EXT4_SB(sb)->s_es; struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; int error = 0; @@ -3140,8 +3212,8 @@ static int ext4_commit_super(struct super_block *sb, * be remapped. Nothing we can do but to retry the * write and hope for the best. */ - printk(KERN_ERR "EXT4-fs: previous I/O error to " - "superblock detected for %s.\n", sb->s_id); + ext4_msg(sb, KERN_ERR, "previous I/O error to " + "superblock detected"); clear_buffer_write_io_error(sbh); set_buffer_uptodate(sbh); } @@ -3154,7 +3226,7 @@ static int ext4_commit_super(struct super_block *sb, &EXT4_SB(sb)->s_freeblocks_counter)); es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( &EXT4_SB(sb)->s_freeinodes_counter)); - + sb->s_dirt = 0; BUFFER_TRACE(sbh, "marking dirty"); mark_buffer_dirty(sbh); if (sync) { @@ -3164,8 +3236,8 @@ static int ext4_commit_super(struct super_block *sb, error = buffer_write_io_error(sbh); if (error) { - printk(KERN_ERR "EXT4-fs: I/O error while writing " - "superblock for %s.\n", sb->s_id); + ext4_msg(sb, KERN_ERR, "I/O error while writing " + "superblock"); clear_buffer_write_io_error(sbh); set_buffer_uptodate(sbh); } @@ -3173,7 +3245,6 @@ static int ext4_commit_super(struct super_block *sb, return error; } - /* * Have we just finished recovery? If so, and if we are mounting (or * remounting) the filesystem readonly, then we will end up with a @@ -3192,14 +3263,11 @@ static void ext4_mark_recovery_complete(struct super_block *sb, if (jbd2_journal_flush(journal) < 0) goto out; - lock_super(sb); if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && sb->s_flags & MS_RDONLY) { EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); - sb->s_dirt = 0; - ext4_commit_super(sb, es, 1); + ext4_commit_super(sb, 1); } - unlock_super(sb); out: jbd2_journal_unlock_updates(journal); @@ -3238,7 +3306,7 @@ static void ext4_clear_journal_err(struct super_block *sb, EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; es->s_state |= cpu_to_le16(EXT4_ERROR_FS); - ext4_commit_super(sb, es, 1); + ext4_commit_super(sb, 1); jbd2_journal_clear_err(journal); } @@ -3257,29 +3325,15 @@ int ext4_force_commit(struct super_block *sb) return 0; journal = EXT4_SB(sb)->s_journal; - if (journal) { - sb->s_dirt = 0; + if (journal) ret = ext4_journal_force_commit(journal); - } return ret; } -/* - * Ext4 always journals updates to the superblock itself, so we don't - * have to propagate any other updates to the superblock on disk at this - * point. (We can probably nuke this function altogether, and remove - * any mention to sb->s_dirt in all of fs/ext4; eventual cleanup...) - */ static void ext4_write_super(struct super_block *sb) { - if (EXT4_SB(sb)->s_journal) { - if (mutex_trylock(&sb->s_lock) != 0) - BUG(); - sb->s_dirt = 0; - } else { - ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); - } + ext4_commit_super(sb, 1); } static int ext4_sync_fs(struct super_block *sb, int wait) @@ -3288,16 +3342,9 @@ static int ext4_sync_fs(struct super_block *sb, int wait) tid_t target; trace_mark(ext4_sync_fs, "dev %s wait %d", sb->s_id, wait); - sb->s_dirt = 0; - if (EXT4_SB(sb)->s_journal) { - if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, - &target)) { - if (wait) - jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, - target); - } - } else { - ext4_commit_super(sb, EXT4_SB(sb)->s_es, wait); + if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, &target)) { + if (wait) + jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, target); } return ret; } @@ -3310,34 +3357,32 @@ static int ext4_freeze(struct super_block *sb) { int error = 0; journal_t *journal; - sb->s_dirt = 0; - if (!(sb->s_flags & MS_RDONLY)) { - journal = EXT4_SB(sb)->s_journal; + if (sb->s_flags & MS_RDONLY) + return 0; - if (journal) { - /* Now we set up the journal barrier. */ - jbd2_journal_lock_updates(journal); + journal = EXT4_SB(sb)->s_journal; - /* - * We don't want to clear needs_recovery flag when we - * failed to flush the journal. - */ - error = jbd2_journal_flush(journal); - if (error < 0) - goto out; - } + /* Now we set up the journal barrier. */ + jbd2_journal_lock_updates(journal); - /* Journal blocked and flushed, clear needs_recovery flag. */ - EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); - error = ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); - if (error) - goto out; + /* + * Don't clear the needs_recovery flag if we failed to flush + * the journal. + */ + error = jbd2_journal_flush(journal); + if (error < 0) { + out: + jbd2_journal_unlock_updates(journal); + return error; } + + /* Journal blocked and flushed, clear needs_recovery flag. */ + EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); + error = ext4_commit_super(sb, 1); + if (error) + goto out; return 0; -out: - jbd2_journal_unlock_updates(journal); - return error; } /* @@ -3346,14 +3391,15 @@ static int ext4_freeze(struct super_block *sb) */ static int ext4_unfreeze(struct super_block *sb) { - if (EXT4_SB(sb)->s_journal && !(sb->s_flags & MS_RDONLY)) { - lock_super(sb); - /* Reser the needs_recovery flag before the fs is unlocked. */ - EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); - ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); - unlock_super(sb); - jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); - } + if (sb->s_flags & MS_RDONLY) + return 0; + + lock_super(sb); + /* Reset the needs_recovery flag before the fs is unlocked. */ + EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); + ext4_commit_super(sb, 1); + unlock_super(sb); + jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); return 0; } @@ -3432,22 +3478,15 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data) (sbi->s_mount_state & EXT4_VALID_FS)) es->s_state = cpu_to_le16(sbi->s_mount_state); - /* - * We have to unlock super so that we can wait for - * transactions. - */ - if (sbi->s_journal) { - unlock_super(sb); + if (sbi->s_journal) ext4_mark_recovery_complete(sb, es); - lock_super(sb); - } } else { int ret; if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP))) { - printk(KERN_WARNING "EXT4-fs: %s: couldn't " + ext4_msg(sb, KERN_WARNING, "couldn't " "remount RDWR because of unsupported " - "optional features (%x).\n", sb->s_id, + "optional features (%x)", (le32_to_cpu(sbi->s_es->s_feature_ro_compat) & ~EXT4_FEATURE_RO_COMPAT_SUPP)); err = -EROFS; @@ -3456,17 +3495,15 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data) /* * Make sure the group descriptor checksums - * are sane. If they aren't, refuse to - * remount r/w. + * are sane. If they aren't, refuse to remount r/w. */ for (g = 0; g < sbi->s_groups_count; g++) { struct ext4_group_desc *gdp = ext4_get_group_desc(sb, g, NULL); if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { - printk(KERN_ERR - "EXT4-fs: ext4_remount: " - "Checksum for group %u failed (%u!=%u)\n", + ext4_msg(sb, KERN_ERR, + "ext4_remount: Checksum for group %u failed (%u!=%u)", g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), le16_to_cpu(gdp->bg_checksum)); err = -EINVAL; @@ -3480,11 +3517,10 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data) * require a full umount/remount for now. */ if (es->s_last_orphan) { - printk(KERN_WARNING "EXT4-fs: %s: couldn't " + ext4_msg(sb, KERN_WARNING, "Couldn't " "remount RDWR because of unprocessed " "orphan inode list. Please " - "umount/remount instead.\n", - sb->s_id); + "umount/remount instead"); err = -EINVAL; goto restore_opts; } @@ -3504,8 +3540,9 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data) sb->s_flags &= ~MS_RDONLY; } } + ext4_setup_system_zone(sb); if (sbi->s_journal == NULL) - ext4_commit_super(sb, es, 1); + ext4_commit_super(sb, 1); #ifdef CONFIG_QUOTA /* Release old quota file names */ @@ -3515,6 +3552,7 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data) kfree(old_opts.s_qf_names[i]); #endif return 0; + restore_opts: sb->s_flags = old_sb_flags; sbi->s_mount_opt = old_opts.s_mount_opt; @@ -3545,9 +3583,8 @@ static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) if (test_opt(sb, MINIX_DF)) { sbi->s_overhead_last = 0; } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { - ext4_group_t ngroups = sbi->s_groups_count, i; + ext4_group_t i, ngroups = ext4_get_groups_count(sb); ext4_fsblk_t overhead = 0; - smp_rmb(); /* * Compute the overhead (FS structures). This is constant @@ -3599,11 +3636,12 @@ static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) le64_to_cpup((void *)es->s_uuid + sizeof(u64)); buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; + return 0; } -/* Helper function for writing quotas on sync - we need to start transaction before quota file - * is locked for write. Otherwise the are possible deadlocks: +/* Helper function for writing quotas on sync - we need to start transaction + * before quota file is locked for write. Otherwise the are possible deadlocks: * Process 1 Process 2 * ext4_create() quota_sync() * jbd2_journal_start() write_dquot() @@ -3627,7 +3665,7 @@ static int ext4_write_dquot(struct dquot *dquot) inode = dquot_to_inode(dquot); handle = ext4_journal_start(inode, - EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); + EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); if (IS_ERR(handle)) return PTR_ERR(handle); ret = dquot_commit(dquot); @@ -3643,7 +3681,7 @@ static int ext4_acquire_dquot(struct dquot *dquot) handle_t *handle; handle = ext4_journal_start(dquot_to_inode(dquot), - EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); + EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); if (IS_ERR(handle)) return PTR_ERR(handle); ret = dquot_acquire(dquot); @@ -3659,7 +3697,7 @@ static int ext4_release_dquot(struct dquot *dquot) handle_t *handle; handle = ext4_journal_start(dquot_to_inode(dquot), - EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); + EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); if (IS_ERR(handle)) { /* Release dquot anyway to avoid endless cycle in dqput() */ dquot_release(dquot); @@ -3707,7 +3745,7 @@ static int ext4_write_info(struct super_block *sb, int type) static int ext4_quota_on_mount(struct super_block *sb, int type) { return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], - EXT4_SB(sb)->s_jquota_fmt, type); + EXT4_SB(sb)->s_jquota_fmt, type); } /* @@ -3738,9 +3776,9 @@ static int ext4_quota_on(struct super_block *sb, int type, int format_id, if (EXT4_SB(sb)->s_qf_names[type]) { /* Quotafile not in fs root? */ if (path.dentry->d_parent != sb->s_root) - printk(KERN_WARNING - "EXT4-fs: Quota file not on filesystem root. " - "Journaled quota will not work.\n"); + ext4_msg(sb, KERN_WARNING, + "Quota file not on filesystem root. " + "Journaled quota will not work"); } /* @@ -3823,8 +3861,8 @@ static ssize_t ext4_quota_write(struct super_block *sb, int type, handle_t *handle = journal_current_handle(); if (EXT4_SB(sb)->s_journal && !handle) { - printk(KERN_WARNING "EXT4-fs: Quota write (off=%llu, len=%llu)" - " cancelled because transaction is not started.\n", + ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" + " cancelled because transaction is not started", (unsigned long long)off, (unsigned long long)len); return -EIO; } @@ -3878,10 +3916,10 @@ static ssize_t ext4_quota_write(struct super_block *sb, int type, #endif -static int ext4_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static int ext4_get_sb(struct file_system_type *fs_type, int flags, + const char *dev_name, void *data, struct vfsmount *mnt) { - return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); + return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); } static struct file_system_type ext4_fs_type = { @@ -3893,14 +3931,14 @@ static struct file_system_type ext4_fs_type = { }; #ifdef CONFIG_EXT4DEV_COMPAT -static int ext4dev_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static int ext4dev_get_sb(struct file_system_type *fs_type, int flags, + const char *dev_name, void *data,struct vfsmount *mnt) { - printk(KERN_WARNING "EXT4-fs: Update your userspace programs " - "to mount using ext4\n"); - printk(KERN_WARNING "EXT4-fs: ext4dev backwards compatibility " - "will go away by 2.6.31\n"); - return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); + printk(KERN_WARNING "EXT4-fs (%s): Update your userspace programs " + "to mount using ext4\n", dev_name); + printk(KERN_WARNING "EXT4-fs (%s): ext4dev backwards compatibility " + "will go away by 2.6.31\n", dev_name); + return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); } static struct file_system_type ext4dev_fs_type = { @@ -3917,13 +3955,16 @@ static int __init init_ext4_fs(void) { int err; + err = init_ext4_system_zone(); + if (err) + return err; ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); if (!ext4_kset) - return -ENOMEM; + goto out4; ext4_proc_root = proc_mkdir("fs/ext4", NULL); err = init_ext4_mballoc(); if (err) - return err; + goto out3; err = init_ext4_xattr(); if (err) @@ -3948,6 +3989,11 @@ static int __init init_ext4_fs(void) exit_ext4_xattr(); out2: exit_ext4_mballoc(); +out3: + remove_proc_entry("fs/ext4", NULL); + kset_unregister(ext4_kset); +out4: + exit_ext4_system_zone(); return err; } @@ -3962,6 +4008,7 @@ static void __exit exit_ext4_fs(void) exit_ext4_mballoc(); remove_proc_entry("fs/ext4", NULL); kset_unregister(ext4_kset); + exit_ext4_system_zone(); } MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); diff --git a/fs/ioctl.c b/fs/ioctl.c index 82d9c42b8bac..286f38dfc6c0 100644 --- a/fs/ioctl.c +++ b/fs/ioctl.c @@ -414,10 +414,6 @@ static int file_ioctl(struct file *filp, unsigned int cmd, switch (cmd) { case FIBMAP: return ioctl_fibmap(filp, p); - case FS_IOC_FIEMAP: - return ioctl_fiemap(filp, arg); - case FIGETBSZ: - return put_user(inode->i_sb->s_blocksize, p); case FIONREAD: return put_user(i_size_read(inode) - filp->f_pos, p); } @@ -557,6 +553,16 @@ int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd, error = ioctl_fsthaw(filp); break; + case FS_IOC_FIEMAP: + return ioctl_fiemap(filp, arg); + + case FIGETBSZ: + { + struct inode *inode = filp->f_path.dentry->d_inode; + int __user *p = (int __user *)arg; + return put_user(inode->i_sb->s_blocksize, p); + } + default: if (S_ISREG(filp->f_path.dentry->d_inode->i_mode)) error = file_ioctl(filp, cmd, arg); diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 58144102bf25..62be7d294ec2 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -1781,7 +1781,7 @@ int jbd2_journal_wipe(journal_t *journal, int write) * Journal abort has very specific semantics, which we describe * for journal abort. * - * Two internal function, which provide abort to te jbd layer + * Two internal functions, which provide abort to the jbd layer * itself are here. */ @@ -1879,7 +1879,7 @@ void jbd2_journal_abort(journal_t *journal, int errno) * int jbd2_journal_errno () - returns the journal's error state. * @journal: journal to examine. * - * This is the errno numbet set with jbd2_journal_abort(), the last + * This is the errno number set with jbd2_journal_abort(), the last * time the journal was mounted - if the journal was stopped * without calling abort this will be 0. * @@ -1903,7 +1903,7 @@ int jbd2_journal_errno(journal_t *journal) * int jbd2_journal_clear_err () - clears the journal's error state * @journal: journal to act on. * - * An error must be cleared or Acked to take a FS out of readonly + * An error must be cleared or acked to take a FS out of readonly * mode. */ int jbd2_journal_clear_err(journal_t *journal) @@ -1923,7 +1923,7 @@ int jbd2_journal_clear_err(journal_t *journal) * void jbd2_journal_ack_err() - Ack journal err. * @journal: journal to act on. * - * An error must be cleared or Acked to take a FS out of readonly + * An error must be cleared or acked to take a FS out of readonly * mode. */ void jbd2_journal_ack_err(journal_t *journal) diff --git a/fs/mpage.c b/fs/mpage.c index 680ba60863ff..42381bd6543b 100644 --- a/fs/mpage.c +++ b/fs/mpage.c @@ -379,7 +379,8 @@ mpage_readpages(struct address_space *mapping, struct list_head *pages, struct buffer_head map_bh; unsigned long first_logical_block = 0; - clear_buffer_mapped(&map_bh); + map_bh.b_state = 0; + map_bh.b_size = 0; for (page_idx = 0; page_idx < nr_pages; page_idx++) { struct page *page = list_entry(pages->prev, struct page, lru); @@ -412,7 +413,8 @@ int mpage_readpage(struct page *page, get_block_t get_block) struct buffer_head map_bh; unsigned long first_logical_block = 0; - clear_buffer_mapped(&map_bh); + map_bh.b_state = 0; + map_bh.b_size = 0; bio = do_mpage_readpage(bio, page, 1, &last_block_in_bio, &map_bh, &first_logical_block, get_block); if (bio)