diff options
author | Eric W. Biederman <ebiederm@xmission.com> | 2015-05-11 16:44:25 -0500 |
---|---|---|
committer | Eric W. Biederman <ebiederm@xmission.com> | 2015-07-01 10:36:41 -0500 |
commit | eb6d38d5427b3ad42f5268da0f1dd31bb0af1264 (patch) | |
tree | 1fb54abb73c369444d6b84f12e3eff670c0a5d64 /fs/proc/inode.c | |
parent | f9bd6733d3f11e24f3949becf277507d422ee1eb (diff) | |
download | op-kernel-dev-eb6d38d5427b3ad42f5268da0f1dd31bb0af1264.zip op-kernel-dev-eb6d38d5427b3ad42f5268da0f1dd31bb0af1264.tar.gz |
proc: Allow creating permanently empty directories that serve as mount points
Add a new function proc_create_mount_point that when used to creates a
directory that can not be added to.
Add a new function is_empty_pde to test if a function is a mount
point.
Update the code to use make_empty_dir_inode when reporting
a permanently empty directory to the vfs.
Update the code to not allow adding to permanently empty directories.
Update /proc/openprom and /proc/fs/nfsd to be permanently empty directories.
Cc: stable@vger.kernel.org
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'fs/proc/inode.c')
-rw-r--r-- | fs/proc/inode.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/proc/inode.c b/fs/proc/inode.c index 8272aab..e3eb552 100644 --- a/fs/proc/inode.c +++ b/fs/proc/inode.c @@ -423,6 +423,10 @@ struct inode *proc_get_inode(struct super_block *sb, struct proc_dir_entry *de) inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; PROC_I(inode)->pde = de; + if (is_empty_pde(de)) { + make_empty_dir_inode(inode); + return inode; + } if (de->mode) { inode->i_mode = de->mode; inode->i_uid = de->uid; |