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NFSv4: The stateid must remain the same for replayed RPC calls

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If we replay a READ or WRITE call, we should not be changing the
stateid. Currently, we may end up doing so, because the stateid
is only selected at xdr encode time.

This patch ensures that we select the stateid after we get an NFSv4.1
session slot, and that we keep that same stateid across retries.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2013-03-17 15:52:00 -04:00
parent 8c86899f62
commit 9b20614988
5 changed files with 41 additions and 34 deletions
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4
fs/nfs/nfs4_fs.h
View File

@ -234,6 +234,10 @@ extern struct rpc_clnt *nfs4_proc_lookup_mountpoint(struct inode *, struct qstr
extern int nfs4_proc_secinfo(struct inode *, const struct qstr *, struct nfs4_secinfo_flavors *);
extern int nfs4_release_lockowner(struct nfs4_lock_state *);
extern const struct xattr_handler *nfs4_xattr_handlers[];
extern void nfs4_set_rw_stateid(nfs4_stateid *stateid,
const struct nfs_open_context *ctx,
const struct nfs_lock_context *l_ctx,
fmode_t fmode);
#if defined(CONFIG_NFS_V4_1)
static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server)

14
fs/nfs/nfs4filelayout.c
View File

@ -317,10 +317,13 @@ static void filelayout_read_prepare(struct rpc_task *task, void *data)
}
rdata->read_done_cb = filelayout_read_done_cb;
nfs41_setup_sequence(rdata->ds_clp->cl_session,
if (nfs41_setup_sequence(rdata->ds_clp->cl_session,
&rdata->args.seq_args,
&rdata->res.seq_res,
task);
task))
return;
nfs4_set_rw_stateid(&rdata->args.stateid, rdata->args.context,
rdata->args.lock_context, FMODE_READ);
}
static void filelayout_read_call_done(struct rpc_task *task, void *data)
@ -421,10 +424,13 @@ static void filelayout_write_prepare(struct rpc_task *task, void *data)
rpc_exit(task, 0);
return;
}
nfs41_setup_sequence(wdata->ds_clp->cl_session,
if (nfs41_setup_sequence(wdata->ds_clp->cl_session,
&wdata->args.seq_args,
&wdata->res.seq_res,
task);
task))
return;
nfs4_set_rw_stateid(&wdata->args.stateid, wdata->args.context,
wdata->args.lock_context, FMODE_WRITE);
}
static void filelayout_write_call_done(struct rpc_task *task, void *data)

27
fs/nfs/nfs4proc.c
View File

@ -3454,6 +3454,19 @@ static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
return err;
}
void nfs4_set_rw_stateid(nfs4_stateid *stateid,
const struct nfs_open_context *ctx,
const struct nfs_lock_context *l_ctx,
fmode_t fmode)
{
const struct nfs_lockowner *lockowner = NULL;
if (l_ctx != NULL)
lockowner = &l_ctx->lockowner;
nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
}
EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
void __nfs4_read_done_cb(struct nfs_read_data *data)
{
nfs_invalidate_atime(data->header->inode);
@ -3496,10 +3509,13 @@ static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message
static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
{
nfs4_setup_sequence(NFS_SERVER(data->header->inode),
if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
&data->args.seq_args,
&data->res.seq_res,
task);
task))
return;
nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
data->args.lock_context, FMODE_READ);
}
static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
@ -3560,10 +3576,13 @@ static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_messag
static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
{
nfs4_setup_sequence(NFS_SERVER(data->header->inode),
if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
&data->args.seq_args,
&data->res.seq_res,
task);
task))
return;
nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
data->args.lock_context, FMODE_WRITE);
}
static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)

28
fs/nfs/nfs4xdr.c
View File

@ -1506,35 +1506,12 @@ static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
encode_op_hdr(xdr, OP_PUTROOTFH, decode_putrootfh_maxsz, hdr);
}
static void encode_open_stateid(struct xdr_stream *xdr,
const struct nfs_open_context *ctx,
const struct nfs_lock_context *l_ctx,
fmode_t fmode,
int zero_seqid)
{
nfs4_stateid stateid;
if (ctx->state != NULL) {
const struct nfs_lockowner *lockowner = NULL;
if (l_ctx != NULL)
lockowner = &l_ctx->lockowner;
nfs4_select_rw_stateid(&stateid, ctx->state,
fmode, lockowner);
if (zero_seqid)
stateid.seqid = 0;
encode_nfs4_stateid(xdr, &stateid);
} else
encode_nfs4_stateid(xdr, &zero_stateid);
}
static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
{
__be32 *p;
encode_op_hdr(xdr, OP_READ, decode_read_maxsz, hdr);
encode_open_stateid(xdr, args->context, args->lock_context,
FMODE_READ, hdr->minorversion);
encode_nfs4_stateid(xdr, &args->stateid);
p = reserve_space(xdr, 12);
p = xdr_encode_hyper(p, args->offset);
@ -1670,8 +1647,7 @@ static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *arg
__be32 *p;
encode_op_hdr(xdr, OP_WRITE, decode_write_maxsz, hdr);
encode_open_stateid(xdr, args->context, args->lock_context,
FMODE_WRITE, hdr->minorversion);
encode_nfs4_stateid(xdr, &args->stateid);
p = reserve_space(xdr, 16);
p = xdr_encode_hyper(p, args->offset);

2
include/linux/nfs_xdr.h
View File

@ -486,6 +486,7 @@ struct nfs_readargs {
struct nfs_fh * fh;
struct nfs_open_context *context;
struct nfs_lock_context *lock_context;
nfs4_stateid stateid;
__u64 offset;
__u32 count;
unsigned int pgbase;
@ -507,6 +508,7 @@ struct nfs_writeargs {
struct nfs_fh * fh;
struct nfs_open_context *context;
struct nfs_lock_context *lock_context;
nfs4_stateid stateid;
__u64 offset;
__u32 count;
enum nfs3_stable_how stable;