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authorTrond Myklebust <Trond.Myklebust@netapp.com>2007-07-26 17:47:34 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2007-08-07 15:13:19 -0400
commit45328c354e8ae16b67cb3adb72ab57459f9e5fd6 (patch)
treef0c4271a0c9f6b8d9b499f22fffc1804419d49c8 /fs/nfs
parentba683031fae115d61c6b5f4c675cc27f6e9576d2 (diff)
downloadop-kernel-dev-45328c354e8ae16b67cb3adb72ab57459f9e5fd6.zip
op-kernel-dev-45328c354e8ae16b67cb3adb72ab57459f9e5fd6.tar.gz
NFS: Fix NFSv4 open stateid regressions
Do not allow cached open for O_RDONLY or O_WRONLY unless the file has been previously opened in these modes. Also Fix the calculation of the mode in nfs4_close_prepare. We should only issue an OPEN_DOWNGRADE if we're sure that we will still be holding the correct open modes. This may not be the case if we've been doing delegated opens. Finally, there is no need to adjust the open mode bit flags in nfs4_close_done(): that has already been done in nfs4_close_prepare(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/nfs4proc.c16
1 files changed, 7 insertions, 9 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 6ca2795..62b3ae2 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -332,11 +332,9 @@ static int can_open_cached(struct nfs4_state *state, int mode)
switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
case FMODE_READ:
ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
- ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
break;
case FMODE_WRITE:
ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
- ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
break;
case FMODE_READ|FMODE_WRITE:
ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
@@ -1260,7 +1258,7 @@ static void nfs4_close_done(struct rpc_task *task, void *data)
nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
switch (task->tk_status) {
case 0:
- nfs_set_open_stateid(state, &calldata->res.stateid, calldata->arg.open_flags);
+ nfs_set_open_stateid(state, &calldata->res.stateid, 0);
renew_lease(server, calldata->timestamp);
break;
case -NFS4ERR_STALE_STATEID:
@@ -1286,23 +1284,19 @@ static void nfs4_close_prepare(struct rpc_task *task, void *data)
.rpc_cred = state->owner->so_cred,
};
int clear_rd, clear_wr, clear_rdwr;
- int mode;
if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
return;
- mode = FMODE_READ|FMODE_WRITE;
clear_rd = clear_wr = clear_rdwr = 0;
spin_lock(&state->owner->so_lock);
/* Calculate the change in open mode */
if (state->n_rdwr == 0) {
if (state->n_rdonly == 0) {
- mode &= ~FMODE_READ;
clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
}
if (state->n_wronly == 0) {
- mode &= ~FMODE_WRITE;
clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
}
@@ -1314,9 +1308,13 @@ static void nfs4_close_prepare(struct rpc_task *task, void *data)
return;
}
nfs_fattr_init(calldata->res.fattr);
- if (mode != 0)
+ if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
- calldata->arg.open_flags = mode;
+ calldata->arg.open_flags = FMODE_READ;
+ } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
+ msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
+ calldata->arg.open_flags = FMODE_WRITE;
+ }
calldata->timestamp = jiffies;
rpc_call_setup(task, &msg, 0);
}
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