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