mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

ocfs2: return f_fsid info in ocfs2_statfs() 

Currently the f_fsid of struct kstatfs returned from ocfs2_statfs() is
undefined (vfs layer fills in 0 as default). Since in some conditions,
f_fsid value might be used in a (f_fsid, ino) pair to uniquely identify
a file, ocfs2 should return a unique defined f_fsid value from
ocfs2_statfs().

Because uuid_str is the same on big or litlle endian machine, it's
endian consistent to use osb->uuid_str to generate f_fsid value.

Signed-off-by: Coly Li <coly.li@suse.de>
Cc: Sunil Mushran <sunil.mushran@oracle.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
This commit is contained in:
Coly Li 2009-01-16 16:33:05 +08:00 committed by Joel Becker
parent 2f48d593b6
commit 837711f862
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
fs/ocfs2/super.c
View File

@ -1647,6 +1647,10 @@ static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
buf->f_bavail = buf->f_bfree;
buf->f_files = numbits;
buf->f_ffree = freebits;
buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
& 0xFFFFFFFFUL;
buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
brelse(bh);