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authorNeilBrown <neilb@suse.de>2007-02-14 00:33:12 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-14 08:09:53 -0800
commitaf6a4e280e3ff453653f39190b57b345ff0bec16 (patch)
tree4895c90613737db7354f43431ed10a55dc0c98f0 /fs/nfsd/nfs4xdr.c
parent982aedfd091e6d9831216f8519f12242091be4fd (diff)
[PATCH] knfsd: add some new fsid types
Add support for using a filesystem UUID to identify and export point in the filehandle. For NFSv2, this UUID is xor-ed down to 4 or 8 bytes so that it doesn't take up too much room. For NFSv3+, we use the full 16 bytes, and possibly also a 64bit inode number for exports beneath the root of a filesystem. When generating an fsid to return in 'stat' information, use the UUID (hashed down to size) if it is available and a small 'fsid' was not specifically provided. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/nfsd/nfs4xdr.c')
-rw-r--r--fs/nfsd/nfs4xdr.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 18aa9440df14..0efba557fb55 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -1563,14 +1563,20 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
if (exp->ex_fslocs.migrated) {
WRITE64(NFS4_REFERRAL_FSID_MAJOR);
WRITE64(NFS4_REFERRAL_FSID_MINOR);
- } else if (is_fsid(fhp, rqstp->rq_reffh)) {
+ } else switch(fsid_source(fhp)) {
+ case FSIDSOURCE_FSID:
WRITE64((u64)exp->ex_fsid);
WRITE64((u64)0);
- } else {
+ break;
+ case FSIDSOURCE_DEV:
WRITE32(0);
WRITE32(MAJOR(stat.dev));
WRITE32(0);
WRITE32(MINOR(stat.dev));
+ break;
+ case FSIDSOURCE_UUID:
+ WRITEMEM(exp->ex_uuid, 16);
+ break;
}
}
if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {