From 542ce7a9bc6b3838832ae0f4f8de30c667af8ff3 Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Tue, 10 Aug 2010 11:41:35 +0200 Subject: [PATCH] cachefiles: use path_get instead of lone dget Dentry references should not be acquired without a corresponding vfsmount ref. Signed-off-by: Miklos Szeredi Acked-by: David Howells Signed-off-by: Al Viro --- fs/cachefiles/daemon.c | 26 ++++++++++++++------------ 1 file changed, 14 insertions(+), 12 deletions(-) diff --git a/fs/cachefiles/daemon.c b/fs/cachefiles/daemon.c index 24eb0d37241a..72d4d0042826 100644 --- a/fs/cachefiles/daemon.c +++ b/fs/cachefiles/daemon.c @@ -553,7 +553,7 @@ static int cachefiles_daemon_tag(struct cachefiles_cache *cache, char *args) static int cachefiles_daemon_cull(struct cachefiles_cache *cache, char *args) { struct fs_struct *fs; - struct dentry *dir; + struct path path; const struct cred *saved_cred; int ret; @@ -575,22 +575,23 @@ static int cachefiles_daemon_cull(struct cachefiles_cache *cache, char *args) /* extract the directory dentry from the cwd */ fs = current->fs; read_lock(&fs->lock); - dir = dget(fs->pwd.dentry); + path = fs->pwd; + path_get(&path); read_unlock(&fs->lock); - if (!S_ISDIR(dir->d_inode->i_mode)) + if (!S_ISDIR(path.dentry->d_inode->i_mode)) goto notdir; cachefiles_begin_secure(cache, &saved_cred); - ret = cachefiles_cull(cache, dir, args); + ret = cachefiles_cull(cache, path.dentry, args); cachefiles_end_secure(cache, saved_cred); - dput(dir); + path_put(&path); _leave(" = %d", ret); return ret; notdir: - dput(dir); + path_put(&path); kerror("cull command requires dirfd to be a directory"); return -ENOTDIR; @@ -629,7 +630,7 @@ inval: static int cachefiles_daemon_inuse(struct cachefiles_cache *cache, char *args) { struct fs_struct *fs; - struct dentry *dir; + struct path path; const struct cred *saved_cred; int ret; @@ -651,22 +652,23 @@ static int cachefiles_daemon_inuse(struct cachefiles_cache *cache, char *args) /* extract the directory dentry from the cwd */ fs = current->fs; read_lock(&fs->lock); - dir = dget(fs->pwd.dentry); + path = fs->pwd; + path_get(&path); read_unlock(&fs->lock); - if (!S_ISDIR(dir->d_inode->i_mode)) + if (!S_ISDIR(path.dentry->d_inode->i_mode)) goto notdir; cachefiles_begin_secure(cache, &saved_cred); - ret = cachefiles_check_in_use(cache, dir, args); + ret = cachefiles_check_in_use(cache, path.dentry, args); cachefiles_end_secure(cache, saved_cred); - dput(dir); + path_put(&path); //_leave(" = %d", ret); return ret; notdir: - dput(dir); + path_put(&path); kerror("inuse command requires dirfd to be a directory"); return -ENOTDIR; -- 2.34.1