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| author |   Benny Halevy <bhalevy@panasas.com> | 2009-04-03 08:29:17 +0300 |
|---|---|---|
| committer |   J. Bruce Fields <bfields@citi.umich.edu> | 2009-04-03 17:41:23 -0700 |
| commit | 79fb54abd285b442e1f30f851902f3ddf58e7704 (patch) | |
| tree | 93c8278368e7f6328e1cfa695ce96d5c95f3e338 /fs/nfsd/nfs4proc.c | |
| parent | nfsd41: SUPPATTR_EXCLCREAT attribute (diff) | |
| download | linux-dev-79fb54abd285b442e1f30f851902f3ddf58e7704.tar.xz linux-dev-79fb54abd285b442e1f30f851902f3ddf58e7704.zip | |
nfsd41: CREATE_EXCLUSIVE4_1
Implement the CREATE_EXCLUSIVE4_1 open mode conforming to
http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26
This mode allows the client to atomically create a file
if it doesn't exist while setting some of its attributes.
It must be implemented if the server supports persistent
reply cache and/or pnfs.
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Diffstat (limited to 'fs/nfsd/nfs4proc.c')
| -rw-r--r-- | fs/nfsd/nfs4proc.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index e206053433e3..b2883e9c6381 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -93,6 +93,21 @@ do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_o open->op_truncate = 0; if (open->op_create) { + /* FIXME: check session persistence and pnfs flags. + * The nfsv4.1 spec requires the following semantics: + * + * Persistent | pNFS | Server REQUIRED | Client Allowed + * Reply Cache | server | | + * -------------+--------+-----------------+-------------------- + * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 + * | | | (SHOULD) + * | | and EXCLUSIVE4 | or EXCLUSIVE4 + * | | | (SHOULD NOT) + * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 + * yes | no | GUARDED4 | GUARDED4 + * yes | yes | GUARDED4 | GUARDED4 + */ + /* * Note: create modes (UNCHECKED,GUARDED...) are the same * in NFSv4 as in v3. |