diff options
| author | Mathieu Desnoyers | 2006-11-24 13:50:09 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2006-12-13 15:38:45 -0800 |
| commit | 65c333367b1aea57d58168ad3dc1df27b0227401 (patch) | |
| tree | a90a34d43c815d99de4d40eac372fb98d4dbffd7 | |
| parent | 63223a0654c2a473ae64835819b87826cb7415ee (diff) | |
DebugFS : more file/directory creation error handling
Correct dentry count to handle creation errors.
This patch puts a dput at the file creation instead of the file removal :
lookup_one_len already returns a dentry with reference count of 1. Then,
the dget() in simple_mknod increments it when the dentry is associated
with a file. In a scenario where simple_create or simple_mkdir returns
an error, this would lead to an unwanted increment of the reference
counter, therefore making file removal impossible.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | fs/debugfs/inode.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c index d6c5fb53c746..554f4a9dfaf8 100644 --- a/fs/debugfs/inode.c +++ b/fs/debugfs/inode.c @@ -162,6 +162,7 @@ static int debugfs_create_by_name(const char *name, mode_t mode, error = debugfs_mkdir(parent->d_inode, *dentry, mode); else error = debugfs_create(parent->d_inode, *dentry, mode); + dput(*dentry); } else error = PTR_ERR(*dentry); mutex_unlock(&parent->d_inode->i_mutex); @@ -273,6 +274,7 @@ EXPORT_SYMBOL_GPL(debugfs_create_dir); void debugfs_remove(struct dentry *dentry) { struct dentry *parent; + int ret = 0; if (!dentry) return; @@ -284,11 +286,15 @@ void debugfs_remove(struct dentry *dentry) mutex_lock(&parent->d_inode->i_mutex); if (debugfs_positive(dentry)) { if (dentry->d_inode) { - if (S_ISDIR(dentry->d_inode->i_mode)) - simple_rmdir(parent->d_inode, dentry); - else + if (S_ISDIR(dentry->d_inode->i_mode)) { + ret = simple_rmdir(parent->d_inode, dentry); + if (ret) + printk(KERN_ERR + "DebugFS rmdir on %s failed : " + "directory not empty.\n", + dentry->d_name.name); + } else simple_unlink(parent->d_inode, dentry); - dput(dentry); } } mutex_unlock(&parent->d_inode->i_mutex); |