forked from luck/tmp_suning_uos_patched
powerpc/spufs: only add ".ctx" file with "debug" mount option
Currently, the .ctx debug file in spu context directories is always present. We'd prefer to prevent users from relying on this file, so add a "debug" mount option to spufs. The .ctx file will only be added to the context directories when this option is present. Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
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parent
6f7dde812d
commit
2c3e47871d
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@ -2645,7 +2645,6 @@ struct spufs_tree_descr spufs_dir_contents[] = {
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{ "tid", &spufs_tid_fops, 0444, },
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{ "tid", &spufs_tid_fops, 0444, },
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{ "stat", &spufs_stat_fops, 0444, },
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{ "stat", &spufs_stat_fops, 0444, },
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{ "switch_log", &spufs_switch_log_fops, 0444 },
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{ "switch_log", &spufs_switch_log_fops, 0444 },
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{ ".ctx", &spufs_ctx_fops, 0444, },
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{},
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{},
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};
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};
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@ -2671,6 +2670,10 @@ struct spufs_tree_descr spufs_dir_nosched_contents[] = {
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{ "object-id", &spufs_object_id_ops, 0666, },
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{ "object-id", &spufs_object_id_ops, 0666, },
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{ "tid", &spufs_tid_fops, 0444, },
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{ "tid", &spufs_tid_fops, 0444, },
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{ "stat", &spufs_stat_fops, 0444, },
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{ "stat", &spufs_stat_fops, 0444, },
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{},
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};
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struct spufs_tree_descr spufs_dir_debug_contents[] = {
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{ ".ctx", &spufs_ctx_fops, 0444, },
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{ ".ctx", &spufs_ctx_fops, 0444, },
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{},
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{},
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};
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};
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@ -42,10 +42,19 @@
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#include "spufs.h"
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#include "spufs.h"
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struct spufs_sb_info {
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int debug;
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};
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static struct kmem_cache *spufs_inode_cache;
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static struct kmem_cache *spufs_inode_cache;
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char *isolated_loader;
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char *isolated_loader;
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static int isolated_loader_size;
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static int isolated_loader_size;
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static struct spufs_sb_info *spufs_get_sb_info(struct super_block *sb)
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{
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return sb->s_fs_info;
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}
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static struct inode *
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static struct inode *
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spufs_alloc_inode(struct super_block *sb)
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spufs_alloc_inode(struct super_block *sb)
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{
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{
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@ -280,6 +289,13 @@ spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags,
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if (ret)
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if (ret)
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goto out_free_ctx;
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goto out_free_ctx;
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if (spufs_get_sb_info(dir->i_sb)->debug)
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ret = spufs_fill_dir(dentry, spufs_dir_debug_contents,
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mode, ctx);
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if (ret)
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goto out_free_ctx;
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d_instantiate(dentry, inode);
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d_instantiate(dentry, inode);
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dget(dentry);
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dget(dentry);
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dir->i_nlink++;
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dir->i_nlink++;
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@ -640,18 +656,19 @@ long spufs_create(struct nameidata *nd, unsigned int flags, mode_t mode,
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/* File system initialization */
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/* File system initialization */
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enum {
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enum {
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Opt_uid, Opt_gid, Opt_mode, Opt_err,
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Opt_uid, Opt_gid, Opt_mode, Opt_debug, Opt_err,
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};
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};
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static match_table_t spufs_tokens = {
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static match_table_t spufs_tokens = {
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{ Opt_uid, "uid=%d" },
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{ Opt_uid, "uid=%d" },
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{ Opt_gid, "gid=%d" },
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{ Opt_gid, "gid=%d" },
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{ Opt_mode, "mode=%o" },
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{ Opt_mode, "mode=%o" },
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{ Opt_err, NULL },
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{ Opt_debug, "debug" },
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{ Opt_err, NULL },
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};
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};
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static int
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static int
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spufs_parse_options(char *options, struct inode *root)
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spufs_parse_options(struct super_block *sb, char *options, struct inode *root)
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{
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{
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char *p;
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char *p;
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substring_t args[MAX_OPT_ARGS];
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substring_t args[MAX_OPT_ARGS];
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@ -679,6 +696,9 @@ spufs_parse_options(char *options, struct inode *root)
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return 0;
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return 0;
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root->i_mode = option | S_IFDIR;
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root->i_mode = option | S_IFDIR;
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break;
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break;
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case Opt_debug:
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spufs_get_sb_info(sb)->debug = 1;
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break;
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default:
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default:
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return 0;
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return 0;
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}
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}
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@ -737,7 +757,7 @@ spufs_create_root(struct super_block *sb, void *data)
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SPUFS_I(inode)->i_ctx = NULL;
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SPUFS_I(inode)->i_ctx = NULL;
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ret = -EINVAL;
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ret = -EINVAL;
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if (!spufs_parse_options(data, inode))
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if (!spufs_parse_options(sb, data, inode))
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goto out_iput;
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goto out_iput;
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ret = -ENOMEM;
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ret = -ENOMEM;
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@ -755,6 +775,7 @@ spufs_create_root(struct super_block *sb, void *data)
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static int
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static int
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spufs_fill_super(struct super_block *sb, void *data, int silent)
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spufs_fill_super(struct super_block *sb, void *data, int silent)
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{
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{
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struct spufs_sb_info *info;
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static struct super_operations s_ops = {
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static struct super_operations s_ops = {
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.alloc_inode = spufs_alloc_inode,
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.alloc_inode = spufs_alloc_inode,
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.destroy_inode = spufs_destroy_inode,
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.destroy_inode = spufs_destroy_inode,
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@ -766,11 +787,16 @@ spufs_fill_super(struct super_block *sb, void *data, int silent)
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save_mount_options(sb, data);
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save_mount_options(sb, data);
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info = kzalloc(sizeof(*info), GFP_KERNEL);
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if (!info)
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return -ENOMEM;
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sb->s_maxbytes = MAX_LFS_FILESIZE;
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sb->s_maxbytes = MAX_LFS_FILESIZE;
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sb->s_blocksize = PAGE_CACHE_SIZE;
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sb->s_blocksize = PAGE_CACHE_SIZE;
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sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
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sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
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sb->s_magic = SPUFS_MAGIC;
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sb->s_magic = SPUFS_MAGIC;
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sb->s_op = &s_ops;
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sb->s_op = &s_ops;
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sb->s_fs_info = info;
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return spufs_create_root(sb, data);
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return spufs_create_root(sb, data);
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}
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}
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@ -244,6 +244,7 @@ struct spufs_tree_descr {
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extern struct spufs_tree_descr spufs_dir_contents[];
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extern struct spufs_tree_descr spufs_dir_contents[];
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extern struct spufs_tree_descr spufs_dir_nosched_contents[];
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extern struct spufs_tree_descr spufs_dir_nosched_contents[];
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extern struct spufs_tree_descr spufs_dir_debug_contents[];
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/* system call implementation */
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/* system call implementation */
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extern struct spufs_calls spufs_calls;
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extern struct spufs_calls spufs_calls;
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