luck/tmp_suning_uos_patched
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iget: stop EXT2 from using iget() and read_inode()

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Stop the EXT2 filesystem from using iget() and read_inode().  Replace
ext2_read_inode() with ext2_iget(), and call that instead of iget().
ext2_iget() then uses iget_locked() directly and returns a proper error code
instead of an inode in the event of an error.

ext2_fill_super() returns any error incurred when getting the root inode
instead of EINVAL.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: <linux-ext4@vger.kernel.org>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Howells 2008-02-07 00:15:35 -08:00 committed by Linus Torvalds
parent 298384cd79
commit 52fcf70329
4 changed files with 46 additions and 29 deletions
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2
fs/ext2/ext2.h
View File

@ -124,7 +124,7 @@ extern void ext2_check_inodes_bitmap (struct super_block *);
extern unsigned long ext2_count_free (struct buffer_head *, unsigned);
/* inode.c */
extern void ext2_read_inode (struct inode *);
extern struct inode *ext2_iget (struct super_block *, unsigned long);
extern int ext2_write_inode (struct inode *, int);
extern void ext2_put_inode (struct inode *);
extern void ext2_delete_inode (struct inode *);

29
fs/ext2/inode.c
View File

@ -1181,22 +1181,33 @@ void ext2_get_inode_flags(struct ext2_inode_info *ei)
ei->i_flags |= EXT2_DIRSYNC_FL;
}
void ext2_read_inode (struct inode * inode)
struct inode *ext2_iget (struct super_block *sb, unsigned long ino)
{
struct ext2_inode_info *ei = EXT2_I(inode);
ino_t ino = inode->i_ino;
struct ext2_inode_info *ei;
struct buffer_head * bh;
struct ext2_inode * raw_inode = ext2_get_inode(inode->i_sb, ino, &bh);
struct ext2_inode *raw_inode;
struct inode *inode;
long ret = -EIO;
int n;
inode = iget_locked(sb, ino);
if (!inode)
return ERR_PTR(-ENOMEM);
if (!(inode->i_state & I_NEW))
return inode;
ei = EXT2_I(inode);
#ifdef CONFIG_EXT2_FS_POSIX_ACL
ei->i_acl = EXT2_ACL_NOT_CACHED;
ei->i_default_acl = EXT2_ACL_NOT_CACHED;
#endif
ei->i_block_alloc_info = NULL;
if (IS_ERR(raw_inode))
raw_inode = ext2_get_inode(inode->i_sb, ino, &bh);
if (IS_ERR(raw_inode)) {
ret = PTR_ERR(raw_inode);
goto bad_inode;
}
inode->i_mode = le16_to_cpu(raw_inode->i_mode);
inode->i_uid = (uid_t)le16_to_cpu(raw_inode->i_uid_low);
@ -1220,6 +1231,7 @@ void ext2_read_inode (struct inode * inode)
if (inode->i_nlink == 0 && (inode->i_mode == 0 || ei->i_dtime)) {
/* this inode is deleted */
brelse (bh);
ret = -ESTALE;
goto bad_inode;
}
inode->i_blocks = le32_to_cpu(raw_inode->i_blocks);
@ -1286,11 +1298,12 @@ void ext2_read_inode (struct inode * inode)
}
brelse (bh);
ext2_set_inode_flags(inode);
return;
unlock_new_inode(inode);
return inode;
bad_inode:
make_bad_inode(inode);
return;
iget_failed(inode);
return ERR_PTR(ret);
}
static int ext2_update_inode(struct inode * inode, int do_sync)

12
fs/ext2/namei.c
View File

@ -63,9 +63,9 @@ static struct dentry *ext2_lookup(struct inode * dir, struct dentry *dentry, str
ino = ext2_inode_by_name(dir, dentry);
inode = NULL;
if (ino) {
inode = iget(dir->i_sb, ino);
if (!inode)
return ERR_PTR(-EACCES);
inode = ext2_iget(dir->i_sb, ino);
if (IS_ERR(inode))
return ERR_CAST(inode);
}
return d_splice_alias(inode, dentry);
}
@ -83,10 +83,10 @@ struct dentry *ext2_get_parent(struct dentry *child)
ino = ext2_inode_by_name(child->d_inode, &dotdot);
if (!ino)
return ERR_PTR(-ENOENT);
inode = iget(child->d_inode->i_sb, ino);
inode = ext2_iget(child->d_inode->i_sb, ino);
if (!inode)
return ERR_PTR(-EACCES);
if (IS_ERR(inode))
return ERR_CAST(inode);
parent = d_alloc_anon(inode);
if (!parent) {
iput(inode);

32
fs/ext2/super.c
View File

@ -296,7 +296,6 @@ static ssize_t ext2_quota_write(struct super_block *sb, int type, const char *da
static const struct super_operations ext2_sops = {
.alloc_inode = ext2_alloc_inode,
.destroy_inode = ext2_destroy_inode,
.read_inode = ext2_read_inode,
.write_inode = ext2_write_inode,
.delete_inode = ext2_delete_inode,
.put_super = ext2_put_super,
@ -326,11 +325,10 @@ static struct inode *ext2_nfs_get_inode(struct super_block *sb,
* it might be "neater" to call ext2_get_inode first and check
* if the inode is valid.....
*/
inode = iget(sb, ino);
if (inode == NULL)
return ERR_PTR(-ENOMEM);
if (is_bad_inode(inode) ||
(generation && inode->i_generation != generation)) {
inode = ext2_iget(sb, ino);
if (IS_ERR(inode))
return ERR_CAST(inode);
if (generation && inode->i_generation != generation) {
/* we didn't find the right inode.. */
iput(inode);
return ERR_PTR(-ESTALE);
@ -746,6 +744,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
unsigned long logic_sb_block;
unsigned long offset = 0;
unsigned long def_mount_opts;
long ret = -EINVAL;
int blocksize = BLOCK_SIZE;
int db_count;
int i, j;
@ -1041,17 +1040,22 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
sb->s_op = &ext2_sops;
sb->s_export_op = &ext2_export_ops;
sb->s_xattr = ext2_xattr_handlers;
root = iget(sb, EXT2_ROOT_INO);
root = ext2_iget(sb, EXT2_ROOT_INO);
if (IS_ERR(root)) {
ret = PTR_ERR(root);
goto failed_mount3;
}
if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
iput(root);
printk(KERN_ERR "EXT2-fs: corrupt root inode, run e2fsck\n");
goto failed_mount3;
}
sb->s_root = d_alloc_root(root);
if (!sb->s_root) {
iput(root);
printk(KERN_ERR "EXT2-fs: get root inode failed\n");
goto failed_mount3;
}
if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
dput(sb->s_root);
sb->s_root = NULL;
printk(KERN_ERR "EXT2-fs: corrupt root inode, run e2fsck\n");
ret = -ENOMEM;
goto failed_mount3;
}
if (EXT2_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL))
@ -1080,7 +1084,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
failed_sbi:
sb->s_fs_info = NULL;
kfree(sbi);
return -EINVAL;
return ret;
}
static void ext2_commit_super (struct super_block * sb,