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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2013-04-20 01:25:45 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2013-04-20 01:39:42 -0400 |
| commit | 92b40e93849e29f9ca661de6442bb66282738bf7 (patch) | |
| tree | 3809ff1f036c1ecbdf7fd265046e49fdefe8eb68 /fs/nfs | |
| parent | 042ad0b398ea4e937e38324dd096bdf9d2c495f7 (diff) | |
| download | linux-stable-92b40e93849e29f9ca661de6442bb66282738bf7.tar.gz linux-stable-92b40e93849e29f9ca661de6442bb66282738bf7.tar.bz2 linux-stable-92b40e93849e29f9ca661de6442bb66282738bf7.zip | |
NFSv4: Use the open stateid if the delegation has the wrong mode
Fix nfs4_select_rw_stateid() so that it chooses the open stateid
(or an all-zero stateid) if the delegation does not match the selected
read/write mode.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/nfs4_fs.h | 1 | ||||
| -rw-r--r-- | fs/nfs/nfs4proc.c | 1 | ||||
| -rw-r--r-- | fs/nfs/nfs4state.c | 6 |
3 files changed, 7 insertions, 1 deletions
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index 7ef19ce6d832..553a83cc4106 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -144,6 +144,7 @@ struct nfs4_lock_state { enum { LK_STATE_IN_USE, NFS_DELEGATED_STATE, /* Current stateid is delegation */ + NFS_OPEN_STATE, /* OPEN stateid is set */ NFS_O_RDONLY_STATE, /* OPEN stateid has read-only state */ NFS_O_WRONLY_STATE, /* OPEN stateid has write-only state */ NFS_O_RDWR_STATE, /* OPEN stateid has read/write state */ diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 282d9fa6994a..39849360f9f6 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -978,6 +978,7 @@ static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid * if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) nfs4_stateid_copy(&state->stateid, stateid); nfs4_stateid_copy(&state->open_stateid, stateid); + set_bit(NFS_OPEN_STATE, &state->flags); switch (fmode) { case FMODE_READ: set_bit(NFS_O_RDONLY_STATE, &state->flags); diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index 1eb17285c99a..b7796950eceb 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -1024,12 +1024,16 @@ out: static int nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) { + const nfs4_stateid *src; int ret; int seq; do { + src = &zero_stateid; seq = read_seqbegin(&state->seqlock); - nfs4_stateid_copy(dst, &state->stateid); + if (test_bit(NFS_OPEN_STATE, &state->flags)) + src = &state->open_stateid; + nfs4_stateid_copy(dst, src); ret = 0; smp_rmb(); if (!list_empty(&state->owner->so_seqid.list)) |