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| author | J. Bruce Fields <bfields@redhat.com> | 2013-06-19 21:47:37 +0200 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2013-07-01 23:32:05 +0200 |
| commit | 89f6c3362cb5a6bce96dbe6aa15b4749c2262b21 (patch) | |
| tree | f748bc3273da6d4978884df5683d7b1fa4fdb059 | |
| parent | svcrpc: don't error out on small tcp fragment (diff) | |
| download | linux-89f6c3362cb5a6bce96dbe6aa15b4749c2262b21.tar.xz linux-89f6c3362cb5a6bce96dbe6aa15b4749c2262b21.zip | |
nfsd4: delegation-based open reclaims should bypass permissions
We saw a v4.0 client's create fail as follows:
- open create succeeds and gets a read delegation
- client attempts to set mode on new file, gets DELAY while
server recalls delegation.
- client attempts a CLAIM_DELEGATE_CUR open using the
delegation, gets error because of new file mode.
This probably can't happen on a recent kernel since we're no longer
giving out delegations on create opens. Nevertheless, it's a
bug--reclaim opens should bypass permission checks.
Reported-by: Steve Dickson <steved@redhat.com>
Reported-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| -rw-r--r-- | fs/nfsd/nfs4proc.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 1a1ff247bc59..a7cee864e7b2 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -296,7 +296,8 @@ do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, stru nfsd4_set_open_owner_reply_cache(cstate, open, resfh); accmode = NFSD_MAY_NOP; - if (open->op_created) + if (open->op_created || + open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) accmode |= NFSD_MAY_OWNER_OVERRIDE; status = do_open_permission(rqstp, resfh, open, accmode); set_change_info(&open->op_cinfo, current_fh); |