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authorEric W. Biederman <ebiederm@xmission.com>2015-05-11 16:44:25 -0500
committerEric W. Biederman <ebiederm@xmission.com>2015-07-01 10:36:41 -0500
commiteb6d38d5427b3ad42f5268da0f1dd31bb0af1264 (patch)
tree1fb54abb73c369444d6b84f12e3eff670c0a5d64 /fs/proc/root.c
parentf9bd6733d3f11e24f3949becf277507d422ee1eb (diff)
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/root.c')
-rw-r--r--fs/proc/root.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/proc/root.c b/fs/proc/root.c
index 64e1ab64bde6..68feb0f70e63 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -179,10 +179,10 @@ void __init proc_root_init(void)
#endif
proc_mkdir("fs", NULL);
proc_mkdir("driver", NULL);
- proc_mkdir("fs/nfsd", NULL); /* somewhere for the nfsd filesystem to be mounted */
+ proc_create_mount_point("fs/nfsd"); /* somewhere for the nfsd filesystem to be mounted */
#if defined(CONFIG_SUN_OPENPROMFS) || defined(CONFIG_SUN_OPENPROMFS_MODULE)
/* just give it a mountpoint */
- proc_mkdir("openprom", NULL);
+ proc_create_mount_point("openprom");
#endif
proc_tty_init();
proc_mkdir("bus", NULL);