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| author | Coly Li <coly.li@suse.de> | 2009-01-16 16:33:05 +0800 |
|---|---|---|
| committer | Joel Becker <joel.becker@oracle.com> | 2009-10-29 15:02:20 -0700 |
| commit | 837711f862bb71ac263837a0f0714dd8cc4ef7ea (patch) | |
| tree | 888b92d23a7563ef1d5a866ac46f2d48a8564101 | |
| parent | 2f48d593b6ceb7bb63d34124ceba77d33be298cf (diff) | |
| download | linux-837711f862bb71ac263837a0f0714dd8cc4ef7ea.tar.gz linux-837711f862bb71ac263837a0f0714dd8cc4ef7ea.tar.bz2 linux-837711f862bb71ac263837a0f0714dd8cc4ef7ea.zip | |
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>
| -rw-r--r-- | fs/ocfs2/super.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c index 960673004df1..14f47d2bfe02 100644 --- a/fs/ocfs2/super.c +++ b/fs/ocfs2/super.c @@ -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); |