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| author | Miklos Szeredi <mszeredi@suse.cz> | 2013-09-05 11:44:41 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-09-05 22:23:53 +0200 |
| commit | 6497d160f6abf8d1082ff1a4efd841118cb1fddd (patch) | |
| tree | fc03ca8342fbd7b441198028b9c29cff83533db3 /fs/sysfs/dir.c | |
| parent | nfs: use check_submounts_and_drop() (diff) | |
| download | linux-6497d160f6abf8d1082ff1a4efd841118cb1fddd.tar.xz linux-6497d160f6abf8d1082ff1a4efd841118cb1fddd.zip | |
sysfs: use check_submounts_and_drop()
Do have_submounts(), shrink_dcache_parent() and d_drop() atomically.
check_submounts_and_drop() can deal with negative dentries and
non-directories as well.
Non-directories can also be mounted on. And just like directories we don't
want these to disappear with invalidation.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to '')
| -rw-r--r-- | fs/sysfs/dir.c | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c index 99ec5b40e977..4d83cedb9fcb 100644 --- a/fs/sysfs/dir.c +++ b/fs/sysfs/dir.c @@ -297,7 +297,6 @@ static int sysfs_dentry_delete(const struct dentry *dentry) static int sysfs_dentry_revalidate(struct dentry *dentry, unsigned int flags) { struct sysfs_dirent *sd; - int is_dir; int type; if (flags & LOOKUP_RCU) @@ -341,18 +340,15 @@ out_bad: * is performed at its new name the dentry will be readded * to the dcache hashes. */ - is_dir = (sysfs_type(sd) == SYSFS_DIR); mutex_unlock(&sysfs_mutex); - if (is_dir) { - /* If we have submounts we must allow the vfs caches - * to lie about the state of the filesystem to prevent - * leaks and other nasty things. - */ - if (have_submounts(dentry)) - goto out_valid; - shrink_dcache_parent(dentry); - } - d_drop(dentry); + + /* If we have submounts we must allow the vfs caches + * to lie about the state of the filesystem to prevent + * leaks and other nasty things. + */ + if (check_submounts_and_drop(dentry) != 0) + goto out_valid; + return 0; } |