summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2011-04-12 13:35:56 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-04-12 13:35:56 -0700
commitbe85bccaa5aa5a11dcaf85f9e945ffefd253f631 (patch)
tree342a0c1529d077ec499f62dfa01ff4697387f1ab
parent16ad56972ca3161eb97583897f17c1ead0c4ebd0 (diff)
Revert "vfs: Export file system uuid via /proc/<pid>/mountinfo"
This reverts commit 93f1c20bc8cdb757be50566eff88d65c3b26881f. It turns out that libmount misparses it because it adds a '-' character in the uuid string, which libmount then incorrectly confuses with the separator string (" - ") at the end of all the optional arguments. Upstream libmount (in the util-linux tree) has been fixed, but until that fix actually percolates up to users, we'd better not expose this change in the kernel. Let's revisit this later (possibly by exposing the UUID without any '-' characters in it, avoiding the user-space bug). Reported-by: Dave Jones <davej@redhat.com> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Karel Zak <kzak@redhat.com> Cc: Ram Pai <linuxram@us.ibm.com> Cc: Miklos Szeredi <mszeredi@suse.cz> Cc: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/namespace.c16
-rw-r--r--include/linux/fs.h1
2 files changed, 0 insertions, 17 deletions
diff --git a/fs/namespace.c b/fs/namespace.c
index 7dba2ed03429..d99bcf59e4c2 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1030,18 +1030,6 @@ const struct seq_operations mounts_op = {
.show = show_vfsmnt
};
-static int uuid_is_nil(u8 *uuid)
-{
- int i;
- u8 *cp = (u8 *)uuid;
-
- for (i = 0; i < 16; i++) {
- if (*cp++)
- return 0;
- }
- return 1;
-}
-
static int show_mountinfo(struct seq_file *m, void *v)
{
struct proc_mounts *p = m->private;
@@ -1085,10 +1073,6 @@ static int show_mountinfo(struct seq_file *m, void *v)
if (IS_MNT_UNBINDABLE(mnt))
seq_puts(m, " unbindable");
- if (!uuid_is_nil(mnt->mnt_sb->s_uuid))
- /* print the uuid */
- seq_printf(m, " uuid:%pU", mnt->mnt_sb->s_uuid);
-
/* Filesystem specific data */
seq_puts(m, " - ");
show_type(m, sb);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index dbd860af0804..5b14843af9f9 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1403,7 +1403,6 @@ struct super_block {
wait_queue_head_t s_wait_unfrozen;
char s_id[32]; /* Informational name */
- u8 s_uuid[16]; /* UUID */
void *s_fs_info; /* Filesystem private info */
fmode_t s_mode;