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nfs41: call free slot from nfs4_restart_rpc

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nfs41_sequence_free_slot can be called multiple times on SEQUENCE operation
errors.
No reason to inline nfs4_restart_rpc

Reported-by: Trond Myklebust <trond.myklebust@netapp.com>

nfs_writeback_done and nfs_readpage_retry call nfs4_restart_rpc outside the
error handler, and the slot is not freed prior to restarting in the rpc_prepare
state during session reset.

Fix this by moving the call to nfs41_sequence_free_slot from the error
path of nfs41_sequence_done into nfs4_restart_rpc, and by removing the test
for NFS4CLNT_SESSION_SETUP.
Always free slot and goto the rpc prepare state on async errors.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Andy Adamson 2009-12-04 15:55:29 -05:00 committed by Trond Myklebust
parent 1d9ddde94a
commit e608e79f1b
5 changed files with 32 additions and 23 deletions
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16
fs/nfs/internal.h
View file

@ -177,26 +177,14 @@ extern __be32 * nfs_decode_dirent(__be32 *, struct nfs_entry *, int);
extern struct rpc_procinfo nfs3_procedures[];
extern __be32 *nfs3_decode_dirent(__be32 *, struct nfs_entry *, int);
/* nfs4proc.c */
static inline void nfs4_restart_rpc(struct rpc_task *task,
const struct nfs_client *clp)
{
#ifdef CONFIG_NFS_V4_1
if (nfs4_has_session(clp) &&
test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) {
rpc_restart_call_prepare(task);
return;
}
#endif /* CONFIG_NFS_V4_1 */
rpc_restart_call(task);
}
/* nfs4xdr.c */
#ifdef CONFIG_NFS_V4
extern __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus);
#endif
/* nfs4proc.c */
extern void nfs4_restart_rpc(struct rpc_task *, const struct nfs_client *,
struct nfs4_sequence_res *);
#ifdef CONFIG_NFS_V4
extern struct rpc_procinfo nfs4_procedures[];
#endif

29
fs/nfs/nfs4proc.c
View file

@ -644,6 +644,19 @@ static void nfs4_sequence_done(const struct nfs_server *server,
#endif /* CONFIG_NFS_V4_1 */
}
void nfs4_restart_rpc(struct rpc_task *task, const struct nfs_client *clp,
struct nfs4_sequence_res *res)
{
#ifdef CONFIG_NFS_V4_1
if (nfs4_has_session(clp)) {
nfs41_sequence_free_slot(clp, res);
rpc_restart_call_prepare(task);
return;
}
#endif /* CONFIG_NFS_V4_1 */
rpc_restart_call(task);
}
/* no restart, therefore free slot here */
static void nfs4_sequence_done_free_slot(const struct nfs_server *server,
struct nfs4_sequence_res *res,
@ -1750,7 +1763,8 @@ static void nfs4_close_done(struct rpc_task *task, void *data)
break;
default:
if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
nfs4_restart_rpc(task, server->nfs_client);
nfs4_restart_rpc(task, server->nfs_client,
&calldata->res.seq_res);
return;
}
}
@ -2988,7 +3002,7 @@ static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
nfs4_restart_rpc(task, server->nfs_client);
nfs4_restart_rpc(task, server->nfs_client, &data->res.seq_res);
return -EAGAIN;
}
@ -3013,7 +3027,8 @@ static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
task->tk_status);
if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client,
&data->res.seq_res);
return -EAGAIN;
}
if (task->tk_status >= 0) {
@ -3041,7 +3056,8 @@ static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
task->tk_status);
if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client,
&data->res.seq_res);
return -EAGAIN;
}
nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client,
@ -3755,7 +3771,8 @@ static void nfs4_locku_done(struct rpc_task *task, void *data)
default:
if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
nfs4_restart_rpc(task,
calldata->server->nfs_client);
calldata->server->nfs_client,
&calldata->res.seq_res);
}
nfs4_sequence_free_slot(calldata->server->nfs_client,
&calldata->res.seq_res);
@ -4890,7 +4907,7 @@ void nfs41_sequence_call_done(struct rpc_task *task, void *data)
if (_nfs4_async_handle_error(task, NULL, clp, NULL)
== -EAGAIN) {
nfs4_restart_rpc(task, clp);
nfs4_restart_rpc(task, clp, task->tk_msg.rpc_resp);
return;
}
}

3
fs/nfs/read.c
View file

@ -368,7 +368,8 @@ static void nfs_readpage_retry(struct rpc_task *task, struct nfs_read_data *data
argp->offset += resp->count;
argp->pgbase += resp->count;
argp->count -= resp->count;
nfs4_restart_rpc(task, NFS_SERVER(data->inode)->nfs_client);
nfs4_restart_rpc(task, NFS_SERVER(data->inode)->nfs_client,
&data->res.seq_res);
return;
out:
nfs4_sequence_free_slot(NFS_SERVER(data->inode)->nfs_client,

4
fs/nfs/unlink.c
View file

@ -81,9 +81,11 @@ static void nfs_async_unlink_done(struct rpc_task *task, void *calldata)
{
struct nfs_unlinkdata *data = calldata;
struct inode *dir = data->dir;
struct nfs_removeres *res = task->tk_msg.rpc_resp;
if (!NFS_PROTO(dir)->unlink_done(task, dir))
nfs4_restart_rpc(task, NFS_SERVER(dir)->nfs_client);
nfs4_restart_rpc(task, NFS_SERVER(dir)->nfs_client,
&res->seq_res);
}
/**

3
fs/nfs/write.c
View file

@ -1216,7 +1216,8 @@ int nfs_writeback_done(struct rpc_task *task, struct nfs_write_data *data)
*/
argp->stable = NFS_FILE_SYNC;
}
nfs4_restart_rpc(task, server->nfs_client);
nfs4_restart_rpc(task, server->nfs_client,
&data->res.seq_res);
return -EAGAIN;
}
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