Commit 864472e9 authored by Trond Myklebust's avatar Trond Myklebust

NFSv4: Make open recovery track O_RDWR, O_RDONLY and O_WRONLY correctly

 When recovering from a delegation recall or a network partition, we need
 to replay open(O_RDWR), open(O_RDONLY) and open(O_WRONLY) separately.
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent e7616923
......@@ -58,7 +58,7 @@
#define NFS4_POLL_RETRY_MAX (15*HZ)
struct nfs4_opendata;
static int _nfs4_proc_open_confirm(struct nfs4_opendata *data);
static int _nfs4_proc_open(struct nfs4_opendata *data);
static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
......@@ -346,32 +346,108 @@ static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data
return state;
}
static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
{
struct nfs_inode *nfsi = NFS_I(state->inode);
struct nfs_open_context *ctx;
spin_lock(&state->inode->i_lock);
list_for_each_entry(ctx, &nfsi->open_files, list) {
if (ctx->state != state)
continue;
get_nfs_open_context(ctx);
spin_unlock(&state->inode->i_lock);
return ctx;
}
spin_unlock(&state->inode->i_lock);
return ERR_PTR(-ENOENT);
}
static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid)
{
int ret;
opendata->o_arg.open_flags = openflags;
ret = _nfs4_proc_open(opendata);
if (ret != 0)
return ret;
memcpy(stateid->data, opendata->o_res.stateid.data,
sizeof(stateid->data));
return 0;
}
static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
{
nfs4_stateid stateid;
struct nfs4_state *newstate;
int mode = 0;
int delegation = 0;
int ret;
/* memory barrier prior to reading state->n_* */
smp_rmb();
if (state->n_rdwr != 0) {
ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid);
if (ret != 0)
return ret;
mode |= FMODE_READ|FMODE_WRITE;
if (opendata->o_res.delegation_type != 0)
delegation = opendata->o_res.delegation_type;
smp_rmb();
}
if (state->n_wronly != 0) {
ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid);
if (ret != 0)
return ret;
mode |= FMODE_WRITE;
if (opendata->o_res.delegation_type != 0)
delegation = opendata->o_res.delegation_type;
smp_rmb();
}
if (state->n_rdonly != 0) {
ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid);
if (ret != 0)
return ret;
mode |= FMODE_READ;
}
clear_bit(NFS_DELEGATED_STATE, &state->flags);
if (mode == 0)
return 0;
if (opendata->o_res.delegation_type == 0)
opendata->o_res.delegation_type = delegation;
opendata->o_arg.open_flags |= mode;
newstate = nfs4_opendata_to_nfs4_state(opendata);
if (newstate != NULL) {
if (opendata->o_res.delegation_type != 0) {
struct nfs_inode *nfsi = NFS_I(newstate->inode);
int delegation_flags = 0;
if (nfsi->delegation)
delegation_flags = nfsi->delegation->flags;
if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
nfs_inode_set_delegation(newstate->inode,
opendata->owner->so_cred,
&opendata->o_res);
else
nfs_inode_reclaim_delegation(newstate->inode,
opendata->owner->so_cred,
&opendata->o_res);
}
nfs4_close_state(newstate, opendata->o_arg.open_flags);
}
if (newstate != state)
return -ESTALE;
return 0;
}
/*
* OPEN_RECLAIM:
* reclaim state on the server after a reboot.
*/
static int _nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
static int _nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
{
struct inode *inode = state->inode;
struct nfs_server *server = NFS_SERVER(inode);
struct nfs_delegation *delegation = NFS_I(inode)->delegation;
struct nfs_openargs o_arg = {
.fh = NFS_FH(inode),
.id = sp->so_id,
.open_flags = state->state,
.clientid = server->nfs4_state->cl_clientid,
.claim = NFS4_OPEN_CLAIM_PREVIOUS,
.bitmask = server->attr_bitmask,
};
struct nfs_openres o_res = {
.server = server, /* Grrr */
};
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR],
.rpc_argp = &o_arg,
.rpc_resp = &o_res,
.rpc_cred = sp->so_cred,
};
struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
struct nfs4_opendata *opendata;
int delegation_type = 0;
int status;
if (delegation != NULL) {
......@@ -381,38 +457,27 @@ static int _nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *st
set_bit(NFS_DELEGATED_STATE, &state->flags);
return 0;
}
o_arg.u.delegation_type = delegation->type;
delegation_type = delegation->type;
}
o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
if (o_arg.seqid == NULL)
opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
if (opendata == NULL)
return -ENOMEM;
status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
/* Confirm the sequence as being established */
nfs_confirm_seqid(&sp->so_seqid, status);
nfs_increment_open_seqid(status, o_arg.seqid);
if (status == 0) {
memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid));
if (o_res.delegation_type != 0) {
nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res);
/* Did the server issue an immediate delegation recall? */
if (o_res.do_recall)
nfs_async_inode_return_delegation(inode, &o_res.stateid);
}
}
nfs_free_seqid(o_arg.seqid);
clear_bit(NFS_DELEGATED_STATE, &state->flags);
/* Ensure we update the inode attributes */
NFS_CACHEINV(inode);
opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
opendata->o_arg.fh = NFS_FH(state->inode);
nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
opendata->o_arg.u.delegation_type = delegation_type;
status = nfs4_open_recover(opendata, state);
nfs4_opendata_free(opendata);
return status;
}
static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
static int nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
{
struct nfs_server *server = NFS_SERVER(state->inode);
struct nfs4_exception exception = { };
int err;
do {
err = _nfs4_open_reclaim(sp, state);
err = _nfs4_do_open_reclaim(sp, state, dentry);
if (err != -NFS4ERR_DELAY)
break;
nfs4_handle_exception(server, err, &exception);
......@@ -420,50 +485,36 @@ static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *sta
return err;
}
static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
{
struct nfs_open_context *ctx;
int ret;
ctx = nfs4_state_find_open_context(state);
if (IS_ERR(ctx))
return PTR_ERR(ctx);
ret = nfs4_do_open_reclaim(sp, state, ctx->dentry);
put_nfs_open_context(ctx);
return ret;
}
static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
{
struct nfs4_state_owner *sp = state->owner;
struct inode *inode = dentry->d_inode;
struct nfs_server *server = NFS_SERVER(inode);
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR],
.rpc_cred = sp->so_cred,
};
struct nfs4_opendata *opendata;
int status = 0;
int ret;
if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
goto out;
if (state->state == 0)
goto out;
opendata = nfs4_opendata_alloc(dentry, sp, state->state, NULL);
status = -ENOMEM;
return 0;
opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
if (opendata == NULL)
goto out;
return -ENOMEM;
opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
msg.rpc_argp = &opendata->o_arg;
msg.rpc_resp = &opendata->o_res;
memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
sizeof(opendata->o_arg.u.delegation.data));
status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
nfs_increment_open_seqid(status, opendata->o_arg.seqid);
if (status != 0)
goto out_free;
if(opendata->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) {
status = _nfs4_proc_open_confirm(opendata);
if (status != 0)
goto out_free;
}
nfs_confirm_seqid(&sp->so_seqid, 0);
if (status >= 0) {
memcpy(state->stateid.data, opendata->o_res.stateid.data,
sizeof(state->stateid.data));
clear_bit(NFS_DELEGATED_STATE, &state->flags);
}
out_free:
ret = nfs4_open_recover(opendata, state);
nfs4_opendata_free(opendata);
out:
return status;
return ret;
}
int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
......@@ -580,6 +631,8 @@ static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
/* Update sequence id. */
data->o_arg.id = sp->so_id;
data->o_arg.clientid = sp->so_client->cl_clientid;
if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
rpc_call_setup(task, &msg, 0);
}
......@@ -714,55 +767,31 @@ static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openf
*/
static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
{
struct dentry *parent = dget_parent(dentry);
struct inode *inode = state->inode;
struct nfs_delegation *delegation = NFS_I(inode)->delegation;
struct nfs4_opendata *opendata;
struct nfs4_state *newstate;
int openflags = state->state & (FMODE_READ|FMODE_WRITE);
int status = 0;
int ret;
if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
status = _nfs4_do_access(inode, sp->so_cred, openflags);
if (status < 0)
goto out;
ret = _nfs4_do_access(inode, sp->so_cred, openflags);
if (ret < 0)
return ret;
memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
set_bit(NFS_DELEGATED_STATE, &state->flags);
goto out;
return 0;
}
status = -ENOMEM;
opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL);
if (opendata == NULL)
goto out;
status = _nfs4_proc_open(opendata);
if (status != 0)
goto out_nodeleg;
newstate = nfs4_opendata_to_nfs4_state(opendata);
if (newstate != state)
goto out_stale;
if (opendata->o_res.delegation_type != 0) {
if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM))
nfs_inode_set_delegation(inode, sp->so_cred,
&opendata->o_res);
else
nfs_inode_reclaim_delegation(inode, sp->so_cred,
&opendata->o_res);
return -ENOMEM;
ret = nfs4_open_recover(opendata, state);
if (ret == -ESTALE) {
/* Invalidate the state owner so we don't ever use it again */
nfs4_drop_state_owner(sp);
d_drop(dentry);
}
out_close_state:
nfs4_close_state(newstate, openflags);
out_nodeleg:
nfs4_opendata_free(opendata);
clear_bit(NFS_DELEGATED_STATE, &state->flags);
out:
dput(parent);
return status;
out_stale:
status = -ESTALE;
/* Invalidate the state owner so we don't ever use it again */
nfs4_drop_state_owner(sp);
d_drop(dentry);
/* Should we be trying to close that stateid? */
goto out_close_state;
return ret;
}
static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
......@@ -781,22 +810,15 @@ static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_
static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
{
struct nfs_inode *nfsi = NFS_I(state->inode);
struct nfs_open_context *ctx;
int status;
int ret;
spin_lock(&state->inode->i_lock);
list_for_each_entry(ctx, &nfsi->open_files, list) {
if (ctx->state != state)
continue;
get_nfs_open_context(ctx);
spin_unlock(&state->inode->i_lock);
status = nfs4_do_open_expired(sp, state, ctx->dentry);
put_nfs_open_context(ctx);
return status;
}
spin_unlock(&state->inode->i_lock);
return -ENOENT;
ctx = nfs4_state_find_open_context(state);
if (IS_ERR(ctx))
return PTR_ERR(ctx);
ret = nfs4_do_open_expired(sp, state, ctx->dentry);
put_nfs_open_context(ctx);
return ret;
}
/*
......
......@@ -1552,19 +1552,19 @@ static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, uint32_t *p, struct nf
{
struct xdr_stream xdr;
struct compound_hdr hdr = {
.nops = 2,
.nops = 3,
};
int status;
status = nfs_wait_on_sequence(args->seqid, req->rq_task);
if (status != 0)
goto out;
xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_compound_hdr(&xdr, &hdr);
status = encode_putfh(&xdr, args->fh);
if (status)
goto out;
status = encode_open(&xdr, args);
if (status)
goto out;
status = encode_getfattr(&xdr, args->bitmask);
out:
return status;
}
......@@ -3825,6 +3825,9 @@ static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, uint32_t *p, struct
if (status)
goto out;
status = decode_open(&xdr, res);
if (status)
goto out;
decode_getfattr(&xdr, res->f_attr, res->server);
out:
return status;
}
......
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