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NFSv4: Only increment the sequence id if the server saw it
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It is quite possible that the OPEN, CLOSE, LOCK, LOCKU,... compounds fail
before the actual stateful operation has been executed (for instance in the
PUTFH call). There is no way to tell from the overall status result which
operations were executed from the COMPOUND.

The fix is to move incrementing of the sequence id into the XDR layer,
so that we do it as we process the results from the stateful operation.

Signed-off-by: Trond Myklebust <[email protected]>
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Trond Myklebust authored and Trond Myklebust committed Apr 19, 2008
1 parent 35d0577 commit c1d5193
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Showing 3 changed files with 31 additions and 9 deletions.
12 changes: 6 additions & 6 deletions fs/nfs/nfs4proc.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -240,6 +240,8 @@ static void nfs4_init_opendata_res(struct nfs4_opendata *p)
{
p->o_res.f_attr = &p->f_attr;
p->o_res.dir_attr = &p->dir_attr;
p->o_res.seqid = p->o_arg.seqid;
p->c_res.seqid = p->c_arg.seqid;
p->o_res.server = p->o_arg.server;
nfs_fattr_init(&p->f_attr);
nfs_fattr_init(&p->dir_attr);
Expand Down Expand Up @@ -730,7 +732,6 @@ static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
renew_lease(data->o_res.server, data->timestamp);
data->rpc_done = 1;
}
nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
}

static void nfs4_open_confirm_release(void *calldata)
Expand Down Expand Up @@ -860,7 +861,6 @@ static void nfs4_open_done(struct rpc_task *task, void *calldata)
if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
nfs_confirm_seqid(&data->owner->so_seqid, 0);
}
nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
data->rpc_done = 1;
}

Expand Down Expand Up @@ -1226,7 +1226,6 @@ static void nfs4_close_done(struct rpc_task *task, void *data)
/* hmm. we are done with the inode, and in the process of freeing
* the state_owner. we keep this around to process errors
*/
nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
switch (task->tk_status) {
case 0:
nfs_set_open_stateid(state, &calldata->res.stateid, 0);
Expand Down Expand Up @@ -1333,6 +1332,7 @@ int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
goto out_free_calldata;
calldata->arg.bitmask = server->attr_bitmask;
calldata->res.fattr = &calldata->fattr;
calldata->res.seqid = calldata->arg.seqid;
calldata->res.server = server;
calldata->path.mnt = mntget(path->mnt);
calldata->path.dentry = dget(path->dentry);
Expand Down Expand Up @@ -3159,6 +3159,7 @@ static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
p->arg.fh = NFS_FH(inode);
p->arg.fl = &p->fl;
p->arg.seqid = seqid;
p->res.seqid = seqid;
p->arg.stateid = &lsp->ls_stateid;
p->lsp = lsp;
atomic_inc(&lsp->ls_count);
Expand All @@ -3184,7 +3185,6 @@ static void nfs4_locku_done(struct rpc_task *task, void *data)

if (RPC_ASSASSINATED(task))
return;
nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
switch (task->tk_status) {
case 0:
memcpy(calldata->lsp->ls_stateid.data,
Expand Down Expand Up @@ -3322,6 +3322,7 @@ static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
p->arg.lock_stateid = &lsp->ls_stateid;
p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
p->arg.lock_owner.id = lsp->ls_id.id;
p->res.lock_seqid = p->arg.lock_seqid;
p->lsp = lsp;
atomic_inc(&lsp->ls_count);
p->ctx = get_nfs_open_context(ctx);
Expand All @@ -3348,6 +3349,7 @@ static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
return;
data->arg.open_stateid = &state->stateid;
data->arg.new_lock_owner = 1;
data->res.open_seqid = data->arg.open_seqid;
} else
data->arg.new_lock_owner = 0;
data->timestamp = jiffies;
Expand All @@ -3365,7 +3367,6 @@ static void nfs4_lock_done(struct rpc_task *task, void *calldata)
if (RPC_ASSASSINATED(task))
goto out;
if (data->arg.new_lock_owner != 0) {
nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
if (data->rpc_status == 0)
nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
else
Expand All @@ -3377,7 +3378,6 @@ static void nfs4_lock_done(struct rpc_task *task, void *calldata)
data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
}
nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
out:
dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
}
Expand Down
18 changes: 17 additions & 1 deletion fs/nfs/nfs4xdr.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -3005,6 +3005,8 @@ static int decode_close(struct xdr_stream *xdr, struct nfs_closeres *res)
int status;

status = decode_op_hdr(xdr, OP_CLOSE);
if (status != -EIO)
nfs_increment_open_seqid(status, res->seqid);
if (status)
return status;
READ_BUF(NFS4_STATEID_SIZE);
Expand Down Expand Up @@ -3296,11 +3298,17 @@ static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
int status;

status = decode_op_hdr(xdr, OP_LOCK);
if (status == -EIO)
goto out;
if (status == 0) {
READ_BUF(NFS4_STATEID_SIZE);
COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
} else if (status == -NFS4ERR_DENIED)
return decode_lock_denied(xdr, NULL);
status = decode_lock_denied(xdr, NULL);
if (res->open_seqid != NULL)
nfs_increment_open_seqid(status, res->open_seqid);
nfs_increment_lock_seqid(status, res->lock_seqid);
out:
return status;
}

Expand All @@ -3319,6 +3327,8 @@ static int decode_locku(struct xdr_stream *xdr, struct nfs_locku_res *res)
int status;

status = decode_op_hdr(xdr, OP_LOCKU);
if (status != -EIO)
nfs_increment_lock_seqid(status, res->seqid);
if (status == 0) {
READ_BUF(NFS4_STATEID_SIZE);
COPYMEM(res->stateid.data, NFS4_STATEID_SIZE);
Expand Down Expand Up @@ -3384,6 +3394,8 @@ static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
int status;

status = decode_op_hdr(xdr, OP_OPEN);
if (status != -EIO)
nfs_increment_open_seqid(status, res->seqid);
if (status)
return status;
READ_BUF(NFS4_STATEID_SIZE);
Expand Down Expand Up @@ -3416,6 +3428,8 @@ static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmre
int status;

status = decode_op_hdr(xdr, OP_OPEN_CONFIRM);
if (status != -EIO)
nfs_increment_open_seqid(status, res->seqid);
if (status)
return status;
READ_BUF(NFS4_STATEID_SIZE);
Expand All @@ -3429,6 +3443,8 @@ static int decode_open_downgrade(struct xdr_stream *xdr, struct nfs_closeres *re
int status;

status = decode_op_hdr(xdr, OP_OPEN_DOWNGRADE);
if (status != -EIO)
nfs_increment_open_seqid(status, res->seqid);
if (status)
return status;
READ_BUF(NFS4_STATEID_SIZE);
Expand Down
10 changes: 8 additions & 2 deletions include/linux/nfs_xdr.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -140,6 +140,7 @@ struct nfs_openres {
__u32 rflags;
struct nfs_fattr * f_attr;
struct nfs_fattr * dir_attr;
struct nfs_seqid * seqid;
const struct nfs_server *server;
int delegation_type;
nfs4_stateid delegation;
Expand All @@ -159,6 +160,7 @@ struct nfs_open_confirmargs {

struct nfs_open_confirmres {
nfs4_stateid stateid;
struct nfs_seqid * seqid;
};

/*
Expand All @@ -175,6 +177,7 @@ struct nfs_closeargs {
struct nfs_closeres {
nfs4_stateid stateid;
struct nfs_fattr * fattr;
struct nfs_seqid * seqid;
const struct nfs_server *server;
};
/*
Expand All @@ -199,7 +202,9 @@ struct nfs_lock_args {
};

struct nfs_lock_res {
nfs4_stateid stateid;
nfs4_stateid stateid;
struct nfs_seqid * lock_seqid;
struct nfs_seqid * open_seqid;
};

struct nfs_locku_args {
Expand All @@ -210,7 +215,8 @@ struct nfs_locku_args {
};

struct nfs_locku_res {
nfs4_stateid stateid;
nfs4_stateid stateid;
struct nfs_seqid * seqid;
};

struct nfs_lockt_args {
Expand Down

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