#define NFS4_POLL_RETRY_MIN (1*HZ)
#define NFS4_POLL_RETRY_MAX (15*HZ)
-static int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid, struct nfs_seqid *seqid);
+struct nfs4_opendata;
+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);
spin_unlock(&inode->i_lock);
}
+struct nfs4_opendata {
+ atomic_t count;
+ struct nfs_openargs o_arg;
+ struct nfs_openres o_res;
+ struct nfs_open_confirmargs c_arg;
+ struct nfs_open_confirmres c_res;
+ struct nfs_fattr f_attr;
+ struct nfs_fattr dir_attr;
+ struct dentry *dentry;
+ struct dentry *dir;
+ struct nfs4_state_owner *owner;
+ struct iattr attrs;
+ int rpc_status;
+ int cancelled;
+};
+
+static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
+ struct nfs4_state_owner *sp, int flags,
+ const struct iattr *attrs)
+{
+ struct dentry *parent = dget_parent(dentry);
+ struct inode *dir = parent->d_inode;
+ struct nfs_server *server = NFS_SERVER(dir);
+ struct nfs4_opendata *p;
+
+ p = kzalloc(sizeof(*p), GFP_KERNEL);
+ if (p == NULL)
+ goto err;
+ p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
+ if (p->o_arg.seqid == NULL)
+ goto err_free;
+ atomic_set(&p->count, 1);
+ p->dentry = dget(dentry);
+ p->dir = parent;
+ p->owner = sp;
+ atomic_inc(&sp->so_count);
+ p->o_arg.fh = NFS_FH(dir);
+ p->o_arg.open_flags = flags,
+ p->o_arg.clientid = server->nfs4_state->cl_clientid;
+ p->o_arg.id = sp->so_id;
+ p->o_arg.name = &dentry->d_name;
+ p->o_arg.server = server;
+ p->o_arg.bitmask = server->attr_bitmask;
+ p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
+ p->o_res.f_attr = &p->f_attr;
+ p->o_res.dir_attr = &p->dir_attr;
+ p->o_res.server = server;
+ nfs_fattr_init(&p->f_attr);
+ nfs_fattr_init(&p->dir_attr);
+ if (flags & O_EXCL) {
+ u32 *s = (u32 *) p->o_arg.u.verifier.data;
+ s[0] = jiffies;
+ s[1] = current->pid;
+ } else if (flags & O_CREAT) {
+ p->o_arg.u.attrs = &p->attrs;
+ memcpy(&p->attrs, attrs, sizeof(p->attrs));
+ }
+ p->c_arg.fh = &p->o_res.fh;
+ p->c_arg.stateid = &p->o_res.stateid;
+ p->c_arg.seqid = p->o_arg.seqid;
+ return p;
+err_free:
+ kfree(p);
+err:
+ dput(parent);
+ return NULL;
+}
+
+static void nfs4_opendata_free(struct nfs4_opendata *p)
+{
+ if (p != NULL && atomic_dec_and_test(&p->count)) {
+ nfs_free_seqid(p->o_arg.seqid);
+ nfs4_put_state_owner(p->owner);
+ dput(p->dir);
+ dput(p->dentry);
+ kfree(p);
+ }
+}
+
/* Helper for asynchronous RPC calls */
-static int nfs4_call_async(struct rpc_clnt *clnt, rpc_action tk_begin,
- rpc_action tk_exit, void *calldata)
+static int nfs4_call_async(struct rpc_clnt *clnt,
+ const struct rpc_call_ops *tk_ops, void *calldata)
{
struct rpc_task *task;
- if (!(task = rpc_new_task(clnt, tk_exit, RPC_TASK_ASYNC)))
+ if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata)))
return -ENOMEM;
-
- task->tk_calldata = calldata;
- task->tk_action = tk_begin;
rpc_execute(task);
return 0;
}
+static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
+{
+ sigset_t oldset;
+ int ret;
+
+ rpc_clnt_sigmask(task->tk_client, &oldset);
+ ret = rpc_wait_for_completion_task(task);
+ rpc_clnt_sigunmask(task->tk_client, &oldset);
+ return ret;
+}
+
+static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
+{
+ switch (open_flags) {
+ case FMODE_WRITE:
+ state->n_wronly++;
+ break;
+ case FMODE_READ:
+ state->n_rdonly++;
+ break;
+ case FMODE_READ|FMODE_WRITE:
+ state->n_rdwr++;
+ }
+}
+
static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
{
struct inode *inode = state->inode;
spin_lock(&state->owner->so_lock);
spin_lock(&inode->i_lock);
memcpy(&state->stateid, stateid, sizeof(state->stateid));
- if ((open_flags & FMODE_WRITE))
- state->nwriters++;
- if (open_flags & FMODE_READ)
- state->nreaders++;
+ update_open_stateflags(state, open_flags);
nfs4_state_set_mode_locked(state, state->state | open_flags);
spin_unlock(&inode->i_lock);
spin_unlock(&state->owner->so_lock);
}
+static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
+{
+ struct inode *inode;
+ struct nfs4_state *state = NULL;
+
+ if (!(data->f_attr.valid & NFS_ATTR_FATTR))
+ goto out;
+ inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
+ if (inode == NULL)
+ goto out;
+ state = nfs4_get_open_state(inode, data->owner);
+ if (state == NULL)
+ goto put_inode;
+ update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags);
+put_inode:
+ iput(inode);
+out:
+ 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) {
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);
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 dentry *parent = dget_parent(dentry);
- struct nfs_openargs arg = {
- .fh = NFS_FH(parent->d_inode),
- .clientid = server->nfs4_state->cl_clientid,
- .name = &dentry->d_name,
- .id = sp->so_id,
- .server = server,
- .bitmask = server->attr_bitmask,
- .claim = NFS4_OPEN_CLAIM_DELEGATE_CUR,
- };
- struct nfs_openres res = {
- .server = server,
- };
- struct rpc_message msg = {
- .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR],
- .rpc_argp = &arg,
- .rpc_resp = &res,
- .rpc_cred = sp->so_cred,
- };
- int status = 0;
+ struct nfs4_opendata *opendata;
+ int ret;
if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
- goto out;
- if (state->state == 0)
- goto out;
- arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
- status = -ENOMEM;
- if (arg.seqid == NULL)
- goto out;
- arg.open_flags = state->state;
- memcpy(arg.u.delegation.data, state->stateid.data, sizeof(arg.u.delegation.data));
- status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
- nfs_increment_open_seqid(status, arg.seqid);
- if (status != 0)
- goto out_free;
- if(res.rflags & NFS4_OPEN_RESULT_CONFIRM) {
- status = _nfs4_proc_open_confirm(server->client, NFS_FH(inode),
- sp, &res.stateid, arg.seqid);
- if (status != 0)
- goto out_free;
- }
- nfs_confirm_seqid(&sp->so_seqid, 0);
- if (status >= 0) {
- memcpy(state->stateid.data, res.stateid.data,
- sizeof(state->stateid.data));
- clear_bit(NFS_DELEGATED_STATE, &state->flags);
- }
-out_free:
- nfs_free_seqid(arg.seqid);
-out:
- dput(parent);
- return status;
+ return 0;
+ opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
+ if (opendata == NULL)
+ return -ENOMEM;
+ opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
+ memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
+ sizeof(opendata->o_arg.u.delegation.data));
+ ret = nfs4_open_recover(opendata, state);
+ nfs4_opendata_free(opendata);
+ return ret;
}
int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
return err;
}
-static int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid, struct nfs_seqid *seqid)
+static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
{
- struct nfs_open_confirmargs arg = {
- .fh = fh,
- .seqid = seqid,
- .stateid = *stateid,
- };
- struct nfs_open_confirmres res;
- struct rpc_message msg = {
- .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
- .rpc_argp = &arg,
- .rpc_resp = &res,
- .rpc_cred = sp->so_cred,
+ struct nfs4_opendata *data = calldata;
+ struct rpc_message msg = {
+ .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
+ .rpc_argp = &data->c_arg,
+ .rpc_resp = &data->c_res,
+ .rpc_cred = data->owner->so_cred,
};
+ rpc_call_setup(task, &msg, 0);
+}
+
+static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
+{
+ struct nfs4_opendata *data = calldata;
+
+ data->rpc_status = task->tk_status;
+ if (RPC_ASSASSINATED(task))
+ return;
+ if (data->rpc_status == 0)
+ memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
+ sizeof(data->o_res.stateid.data));
+ nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
+ nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
+}
+
+static void nfs4_open_confirm_release(void *calldata)
+{
+ struct nfs4_opendata *data = calldata;
+ struct nfs4_state *state = NULL;
+
+ /* If this request hasn't been cancelled, do nothing */
+ if (data->cancelled == 0)
+ goto out_free;
+ /* In case of error, no cleanup! */
+ if (data->rpc_status != 0)
+ goto out_free;
+ nfs_confirm_seqid(&data->owner->so_seqid, 0);
+ state = nfs4_opendata_to_nfs4_state(data);
+ if (state != NULL)
+ nfs4_close_state(state, data->o_arg.open_flags);
+out_free:
+ nfs4_opendata_free(data);
+}
+
+static const struct rpc_call_ops nfs4_open_confirm_ops = {
+ .rpc_call_prepare = nfs4_open_confirm_prepare,
+ .rpc_call_done = nfs4_open_confirm_done,
+ .rpc_release = nfs4_open_confirm_release,
+};
+
+/*
+ * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
+ */
+static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
+{
+ struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
+ struct rpc_task *task;
int status;
- status = rpc_call_sync(clnt, &msg, RPC_TASK_NOINTR);
- /* Confirm the sequence as being established */
- nfs_confirm_seqid(&sp->so_seqid, status);
- nfs_increment_open_seqid(status, seqid);
- if (status >= 0)
- memcpy(stateid, &res.stateid, sizeof(*stateid));
+ atomic_inc(&data->count);
+ task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
+ if (IS_ERR(task)) {
+ nfs4_opendata_free(data);
+ return PTR_ERR(task);
+ }
+ status = nfs4_wait_for_completion_rpc_task(task);
+ if (status != 0) {
+ data->cancelled = 1;
+ smp_wmb();
+ } else
+ status = data->rpc_status;
+ rpc_release_task(task);
return status;
}
-static int _nfs4_proc_open(struct inode *dir, struct nfs4_state_owner *sp, struct nfs_openargs *o_arg, struct nfs_openres *o_res)
+static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
{
- struct nfs_server *server = NFS_SERVER(dir);
+ struct nfs4_opendata *data = calldata;
+ struct nfs4_state_owner *sp = data->owner;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
- .rpc_argp = o_arg,
- .rpc_resp = o_res,
+ .rpc_argp = &data->o_arg,
+ .rpc_resp = &data->o_res,
.rpc_cred = sp->so_cred,
};
- int status;
+
+ if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
+ return;
+ /* 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);
+}
- /* Update sequence id. The caller must serialize! */
- o_arg->id = sp->so_id;
- o_arg->clientid = sp->so_client->cl_clientid;
+static void nfs4_open_done(struct rpc_task *task, void *calldata)
+{
+ struct nfs4_opendata *data = calldata;
- status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
- if (status == 0) {
- /* OPEN on anything except a regular file is disallowed in NFSv4 */
- switch (o_res->f_attr->mode & S_IFMT) {
+ data->rpc_status = task->tk_status;
+ if (RPC_ASSASSINATED(task))
+ return;
+ if (task->tk_status == 0) {
+ switch (data->o_res.f_attr->mode & S_IFMT) {
case S_IFREG:
break;
case S_IFLNK:
- status = -ELOOP;
+ data->rpc_status = -ELOOP;
break;
case S_IFDIR:
- status = -EISDIR;
+ data->rpc_status = -EISDIR;
break;
default:
- status = -ENOTDIR;
+ data->rpc_status = -ENOTDIR;
}
}
+ nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
+}
+
+static void nfs4_open_release(void *calldata)
+{
+ struct nfs4_opendata *data = calldata;
+ struct nfs4_state *state = NULL;
- nfs_increment_open_seqid(status, o_arg->seqid);
+ /* If this request hasn't been cancelled, do nothing */
+ if (data->cancelled == 0)
+ goto out_free;
+ /* In case of error, no cleanup! */
+ if (data->rpc_status != 0)
+ goto out_free;
+ /* In case we need an open_confirm, no cleanup! */
+ if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
+ goto out_free;
+ nfs_confirm_seqid(&data->owner->so_seqid, 0);
+ state = nfs4_opendata_to_nfs4_state(data);
+ if (state != NULL)
+ nfs4_close_state(state, data->o_arg.open_flags);
+out_free:
+ nfs4_opendata_free(data);
+}
+
+static const struct rpc_call_ops nfs4_open_ops = {
+ .rpc_call_prepare = nfs4_open_prepare,
+ .rpc_call_done = nfs4_open_done,
+ .rpc_release = nfs4_open_release,
+};
+
+/*
+ * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
+ */
+static int _nfs4_proc_open(struct nfs4_opendata *data)
+{
+ struct inode *dir = data->dir->d_inode;
+ struct nfs_server *server = NFS_SERVER(dir);
+ struct nfs_openargs *o_arg = &data->o_arg;
+ struct nfs_openres *o_res = &data->o_res;
+ struct rpc_task *task;
+ int status;
+
+ atomic_inc(&data->count);
+ task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
+ if (IS_ERR(task)) {
+ nfs4_opendata_free(data);
+ return PTR_ERR(task);
+ }
+ status = nfs4_wait_for_completion_rpc_task(task);
+ if (status != 0) {
+ data->cancelled = 1;
+ smp_wmb();
+ } else
+ status = data->rpc_status;
+ rpc_release_task(task);
if (status != 0)
- goto out;
+ return status;
+
if (o_arg->open_flags & O_CREAT) {
update_changeattr(dir, &o_res->cinfo);
nfs_post_op_update_inode(dir, o_res->dir_attr);
} else
nfs_refresh_inode(dir, o_res->dir_attr);
if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
- status = _nfs4_proc_open_confirm(server->client, &o_res->fh,
- sp, &o_res->stateid, o_arg->seqid);
+ status = _nfs4_proc_open_confirm(data);
if (status != 0)
- goto out;
+ return status;
}
- nfs_confirm_seqid(&sp->so_seqid, 0);
+ nfs_confirm_seqid(&data->owner->so_seqid, 0);
if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
- status = server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
-out:
- return status;
+ return server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
+ return 0;
}
static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
*/
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 *dir = parent->d_inode;
struct inode *inode = state->inode;
- struct nfs_server *server = NFS_SERVER(dir);
struct nfs_delegation *delegation = NFS_I(inode)->delegation;
- struct nfs_fattr f_attr, dir_attr;
- struct nfs_openargs o_arg = {
- .fh = NFS_FH(dir),
- .open_flags = state->state,
- .name = &dentry->d_name,
- .bitmask = server->attr_bitmask,
- .claim = NFS4_OPEN_CLAIM_NULL,
- };
- struct nfs_openres o_res = {
- .f_attr = &f_attr,
- .dir_attr = &dir_attr,
- .server = server,
- };
- int status = 0;
+ struct nfs4_opendata *opendata;
+ int openflags = state->state & (FMODE_READ|FMODE_WRITE);
+ int ret;
if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
- status = _nfs4_do_access(inode, sp->so_cred, state->state);
- 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;
}
- o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
- status = -ENOMEM;
- if (o_arg.seqid == NULL)
- goto out;
- nfs_fattr_init(&f_attr);
- nfs_fattr_init(&dir_attr);
- status = _nfs4_proc_open(dir, sp, &o_arg, &o_res);
- if (status != 0)
- goto out_nodeleg;
- /* Check if files differ */
- if ((f_attr.mode & S_IFMT) != (inode->i_mode & S_IFMT))
- goto out_stale;
- /* Has the file handle changed? */
- if (nfs_compare_fh(&o_res.fh, NFS_FH(inode)) != 0) {
- /* Verify if the change attributes are the same */
- if (f_attr.change_attr != NFS_I(inode)->change_attr)
- goto out_stale;
- if (nfs_size_to_loff_t(f_attr.size) != inode->i_size)
- goto out_stale;
- /* Lets just pretend that this is the same file */
- nfs_copy_fh(NFS_FH(inode), &o_res.fh);
- NFS_I(inode)->fileid = f_attr.fileid;
- }
- memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid));
- if (o_res.delegation_type != 0) {
- if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM))
- nfs_inode_set_delegation(inode, sp->so_cred, &o_res);
- else
- nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res);
+ opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL);
+ if (opendata == NULL)
+ 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_nodeleg:
- nfs_free_seqid(o_arg.seqid);
- 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_nodeleg;
+ nfs4_opendata_free(opendata);
+ return ret;
}
static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
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;
}
/*
- * Returns an nfs4_state + an extra reference to the inode
+ * Returns a referenced nfs4_state if there is an open delegation on the file
*/
static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
{
err = -ENOENT;
if ((state->state & open_flags) == open_flags) {
spin_lock(&inode->i_lock);
- if (open_flags & FMODE_READ)
- state->nreaders++;
- if (open_flags & FMODE_WRITE)
- state->nwriters++;
+ update_open_stateflags(state, open_flags);
spin_unlock(&inode->i_lock);
goto out_ok;
} else if (state->state != 0)
nfs4_put_state_owner(sp);
up_read(&nfsi->rwsem);
up_read(&clp->cl_sem);
- igrab(inode);
*res = state;
return 0;
out_err:
}
/*
- * Returns an nfs4_state + an referenced inode
+ * Returns a referenced nfs4_state
*/
static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
{
struct nfs4_state *state = NULL;
struct nfs_server *server = NFS_SERVER(dir);
struct nfs4_client *clp = server->nfs4_state;
- struct inode *inode = NULL;
+ struct nfs4_opendata *opendata;
int status;
- struct nfs_fattr f_attr, dir_attr;
- struct nfs_openargs o_arg = {
- .fh = NFS_FH(dir),
- .open_flags = flags,
- .name = &dentry->d_name,
- .server = server,
- .bitmask = server->attr_bitmask,
- .claim = NFS4_OPEN_CLAIM_NULL,
- };
- struct nfs_openres o_res = {
- .f_attr = &f_attr,
- .dir_attr = &dir_attr,
- .server = server,
- };
/* Protect against reboot recovery conflicts */
down_read(&clp->cl_sem);
dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
goto out_err;
}
- if (flags & O_EXCL) {
- u32 *p = (u32 *) o_arg.u.verifier.data;
- p[0] = jiffies;
- p[1] = current->pid;
- } else
- o_arg.u.attrs = sattr;
- /* Serialization for the sequence id */
+ opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr);
+ if (opendata == NULL)
+ goto err_put_state_owner;
- o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
- if (o_arg.seqid == NULL)
- return -ENOMEM;
- nfs_fattr_init(&f_attr);
- nfs_fattr_init(&dir_attr);
- status = _nfs4_proc_open(dir, sp, &o_arg, &o_res);
+ status = _nfs4_proc_open(opendata);
if (status != 0)
- goto out_err;
+ goto err_opendata_free;
status = -ENOMEM;
- inode = nfs_fhget(dir->i_sb, &o_res.fh, &f_attr);
- if (!inode)
- goto out_err;
- state = nfs4_get_open_state(inode, sp);
- if (!state)
- goto out_err;
- update_open_stateid(state, &o_res.stateid, flags);
- if (o_res.delegation_type != 0)
- nfs_inode_set_delegation(inode, cred, &o_res);
- nfs_free_seqid(o_arg.seqid);
+ state = nfs4_opendata_to_nfs4_state(opendata);
+ if (state == NULL)
+ goto err_opendata_free;
+ if (opendata->o_res.delegation_type != 0)
+ nfs_inode_set_delegation(state->inode, cred, &opendata->o_res);
+ nfs4_opendata_free(opendata);
nfs4_put_state_owner(sp);
up_read(&clp->cl_sem);
*res = state;
return 0;
+err_opendata_free:
+ nfs4_opendata_free(opendata);
+err_put_state_owner:
+ nfs4_put_state_owner(sp);
out_err:
- if (sp != NULL) {
- if (state != NULL)
- nfs4_put_open_state(state);
- nfs_free_seqid(o_arg.seqid);
- nfs4_put_state_owner(sp);
- }
/* Note: clp->cl_sem must be released before nfs4_put_open_state()! */
up_read(&clp->cl_sem);
- if (inode != NULL)
- iput(inode);
*res = NULL;
return status;
}
struct nfs_fattr fattr;
};
-static void nfs4_free_closedata(struct nfs4_closedata *calldata)
+static void nfs4_free_closedata(void *data)
{
- struct nfs4_state *state = calldata->state;
- struct nfs4_state_owner *sp = state->owner;
+ struct nfs4_closedata *calldata = data;
+ struct nfs4_state_owner *sp = calldata->state->owner;
nfs4_put_open_state(calldata->state);
nfs_free_seqid(calldata->arg.seqid);
kfree(calldata);
}
-static void nfs4_close_done(struct rpc_task *task)
+static void nfs4_close_done(struct rpc_task *task, void *data)
{
- struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata;
+ struct nfs4_closedata *calldata = data;
struct nfs4_state *state = calldata->state;
struct nfs_server *server = NFS_SERVER(calldata->inode);
+ if (RPC_ASSASSINATED(task))
+ return;
/* hmm. we are done with the inode, and in the process of freeing
* the state_owner. we keep this around to process errors
*/
}
}
nfs_refresh_inode(calldata->inode, calldata->res.fattr);
- nfs4_free_closedata(calldata);
}
-static void nfs4_close_begin(struct rpc_task *task)
+static void nfs4_close_prepare(struct rpc_task *task, void *data)
{
- struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata;
+ struct nfs4_closedata *calldata = data;
struct nfs4_state *state = calldata->state;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
.rpc_cred = state->owner->so_cred,
};
int mode = 0, old_mode;
- int status;
- status = nfs_wait_on_sequence(calldata->arg.seqid, task);
- if (status != 0)
+ if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
return;
/* Recalculate the new open mode in case someone reopened the file
* while we were waiting in line to be scheduled.
spin_lock(&state->owner->so_lock);
spin_lock(&calldata->inode->i_lock);
mode = old_mode = state->state;
- if (state->nreaders == 0)
- mode &= ~FMODE_READ;
- if (state->nwriters == 0)
- mode &= ~FMODE_WRITE;
+ if (state->n_rdwr == 0) {
+ if (state->n_rdonly == 0)
+ mode &= ~FMODE_READ;
+ if (state->n_wronly == 0)
+ mode &= ~FMODE_WRITE;
+ }
nfs4_state_set_mode_locked(state, mode);
spin_unlock(&calldata->inode->i_lock);
spin_unlock(&state->owner->so_lock);
if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
- nfs4_free_closedata(calldata);
- task->tk_exit = NULL;
- rpc_exit(task, 0);
+ /* Note: exit _without_ calling nfs4_close_done */
+ task->tk_action = NULL;
return;
}
nfs_fattr_init(calldata->res.fattr);
rpc_call_setup(task, &msg, 0);
}
+static const struct rpc_call_ops nfs4_close_ops = {
+ .rpc_call_prepare = nfs4_close_prepare,
+ .rpc_call_done = nfs4_close_done,
+ .rpc_release = nfs4_free_closedata,
+};
+
/*
* It is possible for data to be read/written from a mem-mapped file
* after the sys_close call (which hits the vfs layer as a flush).
calldata->res.fattr = &calldata->fattr;
calldata->res.server = server;
- status = nfs4_call_async(server->client, nfs4_close_begin,
- nfs4_close_done, calldata);
+ status = nfs4_call_async(server->client, &nfs4_close_ops, calldata);
if (status == 0)
goto out;
d_add(dentry, NULL);
return (struct dentry *)state;
}
- res = d_add_unique(dentry, state->inode);
+ res = d_add_unique(dentry, igrab(state->inode));
if (res != NULL)
dentry = res;
nfs4_intent_set_file(nd, dentry, state);
{
struct rpc_cred *cred;
struct nfs4_state *state;
- struct inode *inode;
cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
if (IS_ERR(cred))
}
goto out_drop;
}
- inode = state->inode;
- iput(inode);
- if (inode == dentry->d_inode) {
+ if (state->inode == dentry->d_inode) {
nfs4_intent_set_file(nd, dentry, state);
return 1;
}
dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
(long long) wdata->args.offset);
+ wdata->args.bitmask = server->attr_bitmask;
+ wdata->res.server = server;
nfs_fattr_init(fattr);
status = rpc_call_sync(server->client, &msg, rpcflags);
dprintk("NFS reply write: %d\n", status);
- return status;
+ if (status < 0)
+ return status;
+ nfs_post_op_update_inode(inode, fattr);
+ return wdata->res.count;
}
static int nfs4_proc_write(struct nfs_write_data *wdata)
dprintk("NFS call commit %d @ %Ld\n", cdata->args.count,
(long long) cdata->args.offset);
+ cdata->args.bitmask = server->attr_bitmask;
+ cdata->res.server = server;
nfs_fattr_init(fattr);
status = rpc_call_sync(server->client, &msg, 0);
dprintk("NFS reply commit: %d\n", status);
+ if (status >= 0)
+ nfs_post_op_update_inode(inode, fattr);
return status;
}
status = PTR_ERR(state);
goto out;
}
- d_instantiate(dentry, state->inode);
+ d_instantiate(dentry, igrab(state->inode));
if (flags & O_EXCL) {
struct nfs_fattr fattr;
status = nfs4_do_setattr(NFS_SERVER(dir), &fattr,
return err;
}
-static void
-nfs4_read_done(struct rpc_task *task)
+static void nfs4_read_done(struct rpc_task *task, void *calldata)
{
- struct nfs_read_data *data = (struct nfs_read_data *) task->tk_calldata;
+ struct nfs_read_data *data = calldata;
struct inode *inode = data->inode;
if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
if (task->tk_status > 0)
renew_lease(NFS_SERVER(inode), data->timestamp);
/* Call back common NFS readpage processing */
- nfs_readpage_result(task);
+ nfs_readpage_result(task, calldata);
}
+static const struct rpc_call_ops nfs4_read_ops = {
+ .rpc_call_done = nfs4_read_done,
+ .rpc_release = nfs_readdata_release,
+};
+
static void
nfs4_proc_read_setup(struct nfs_read_data *data)
{
flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
/* Finalize the task. */
- rpc_init_task(task, NFS_CLIENT(inode), nfs4_read_done, flags);
+ rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_read_ops, data);
rpc_call_setup(task, &msg, 0);
}
-static void
-nfs4_write_done(struct rpc_task *task)
+static void nfs4_write_done(struct rpc_task *task, void *calldata)
{
- struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
+ struct nfs_write_data *data = calldata;
struct inode *inode = data->inode;
if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
nfs_post_op_update_inode(inode, data->res.fattr);
}
/* Call back common NFS writeback processing */
- nfs_writeback_done(task);
+ nfs_writeback_done(task, calldata);
}
+static const struct rpc_call_ops nfs4_write_ops = {
+ .rpc_call_done = nfs4_write_done,
+ .rpc_release = nfs_writedata_release,
+};
+
static void
nfs4_proc_write_setup(struct nfs_write_data *data, int how)
{
flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
/* Finalize the task. */
- rpc_init_task(task, NFS_CLIENT(inode), nfs4_write_done, flags);
+ rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_write_ops, data);
rpc_call_setup(task, &msg, 0);
}
-static void
-nfs4_commit_done(struct rpc_task *task)
+static void nfs4_commit_done(struct rpc_task *task, void *calldata)
{
- struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
+ struct nfs_write_data *data = calldata;
struct inode *inode = data->inode;
if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
if (task->tk_status >= 0)
nfs_post_op_update_inode(inode, data->res.fattr);
/* Call back common NFS writeback processing */
- nfs_commit_done(task);
+ nfs_commit_done(task, calldata);
}
+static const struct rpc_call_ops nfs4_commit_ops = {
+ .rpc_call_done = nfs4_commit_done,
+ .rpc_release = nfs_commit_release,
+};
+
static void
nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
{
flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
/* Finalize the task. */
- rpc_init_task(task, NFS_CLIENT(inode), nfs4_commit_done, flags);
+ rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_commit_ops, data);
rpc_call_setup(task, &msg, 0);
}
* nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
* standalone procedure for queueing an asynchronous RENEW.
*/
-static void
-renew_done(struct rpc_task *task)
+static void nfs4_renew_done(struct rpc_task *task, void *data)
{
struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp;
- unsigned long timestamp = (unsigned long)task->tk_calldata;
+ unsigned long timestamp = (unsigned long)data;
if (task->tk_status < 0) {
switch (task->tk_status) {
spin_unlock(&clp->cl_lock);
}
+static const struct rpc_call_ops nfs4_renew_ops = {
+ .rpc_call_done = nfs4_renew_done,
+};
+
int
nfs4_proc_async_renew(struct nfs4_client *clp)
{
};
return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
- renew_done, (void *)jiffies);
+ &nfs4_renew_ops, (void *)jiffies);
}
int
return status;
}
-static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
+struct nfs4_delegreturndata {
+ struct nfs4_delegreturnargs args;
+ struct nfs_fh fh;
+ nfs4_stateid stateid;
+ struct rpc_cred *cred;
+ int rpc_status;
+};
+
+static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
{
- struct nfs4_delegreturnargs args = {
- .fhandle = NFS_FH(inode),
- .stateid = stateid,
- };
+ struct nfs4_delegreturndata *data = calldata;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
- .rpc_argp = &args,
- .rpc_cred = cred,
+ .rpc_argp = &data->args,
+ .rpc_cred = data->cred,
};
+ rpc_call_setup(task, &msg, 0);
+}
- return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
+static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
+{
+ struct nfs4_delegreturndata *data = calldata;
+ data->rpc_status = task->tk_status;
+}
+
+static void nfs4_delegreturn_release(void *calldata)
+{
+ struct nfs4_delegreturndata *data = calldata;
+
+ put_rpccred(data->cred);
+ kfree(calldata);
+}
+
+const static struct rpc_call_ops nfs4_delegreturn_ops = {
+ .rpc_call_prepare = nfs4_delegreturn_prepare,
+ .rpc_call_done = nfs4_delegreturn_done,
+ .rpc_release = nfs4_delegreturn_release,
+};
+
+static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
+{
+ struct nfs4_delegreturndata *data;
+ struct rpc_task *task;
+ int status;
+
+ data = kmalloc(sizeof(*data), GFP_KERNEL);
+ if (data == NULL)
+ return -ENOMEM;
+ data->args.fhandle = &data->fh;
+ data->args.stateid = &data->stateid;
+ nfs_copy_fh(&data->fh, NFS_FH(inode));
+ memcpy(&data->stateid, stateid, sizeof(data->stateid));
+ data->cred = get_rpccred(cred);
+ data->rpc_status = 0;
+
+ task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
+ if (IS_ERR(task)) {
+ nfs4_delegreturn_release(data);
+ return PTR_ERR(task);
+ }
+ status = nfs4_wait_for_completion_rpc_task(task);
+ if (status == 0)
+ status = data->rpc_status;
+ rpc_release_task(task);
+ return status;
}
int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
return timeout;
}
-static inline int
-nfs4_lck_type(int cmd, struct file_lock *request)
-{
- /* set lock type */
- switch (request->fl_type) {
- case F_RDLCK:
- return IS_SETLKW(cmd) ? NFS4_READW_LT : NFS4_READ_LT;
- case F_WRLCK:
- return IS_SETLKW(cmd) ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
- case F_UNLCK:
- return NFS4_WRITE_LT;
- }
- BUG();
- return 0;
-}
-
-static inline uint64_t
-nfs4_lck_length(struct file_lock *request)
-{
- if (request->fl_end == OFFSET_MAX)
- return ~(uint64_t)0;
- return request->fl_end - request->fl_start + 1;
-}
-
static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
{
struct inode *inode = state->inode;
struct nfs_server *server = NFS_SERVER(inode);
struct nfs4_client *clp = server->nfs4_state;
- struct nfs_lockargs arg = {
+ struct nfs_lockt_args arg = {
.fh = NFS_FH(inode),
- .type = nfs4_lck_type(cmd, request),
- .offset = request->fl_start,
- .length = nfs4_lck_length(request),
+ .fl = request,
};
- struct nfs_lockres res = {
- .server = server,
+ struct nfs_lockt_res res = {
+ .denied = request,
};
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
.rpc_resp = &res,
.rpc_cred = state->owner->so_cred,
};
- struct nfs_lowner nlo;
struct nfs4_lock_state *lsp;
int status;
down_read(&clp->cl_sem);
- nlo.clientid = clp->cl_clientid;
+ arg.lock_owner.clientid = clp->cl_clientid;
status = nfs4_set_lock_state(state, request);
if (status != 0)
goto out;
lsp = request->fl_u.nfs4_fl.owner;
- nlo.id = lsp->ls_id;
- arg.u.lockt = &nlo;
+ arg.lock_owner.id = lsp->ls_id;
status = rpc_call_sync(server->client, &msg, 0);
- if (!status) {
- request->fl_type = F_UNLCK;
- } else if (status == -NFS4ERR_DENIED) {
- int64_t len, start, end;
- start = res.u.denied.offset;
- len = res.u.denied.length;
- end = start + len - 1;
- if (end < 0 || len == 0)
- request->fl_end = OFFSET_MAX;
- else
- request->fl_end = (loff_t)end;
- request->fl_start = (loff_t)start;
- request->fl_type = F_WRLCK;
- if (res.u.denied.type & 1)
- request->fl_type = F_RDLCK;
- request->fl_pid = 0;
- status = 0;
+ switch (status) {
+ case 0:
+ request->fl_type = F_UNLCK;
+ break;
+ case -NFS4ERR_DENIED:
+ status = 0;
}
out:
up_read(&clp->cl_sem);
}
struct nfs4_unlockdata {
- struct nfs_lockargs arg;
- struct nfs_locku_opargs luargs;
- struct nfs_lockres res;
+ struct nfs_locku_args arg;
+ struct nfs_locku_res res;
struct nfs4_lock_state *lsp;
struct nfs_open_context *ctx;
- atomic_t refcount;
- struct completion completion;
+ struct file_lock fl;
+ const struct nfs_server *server;
};
-static void nfs4_locku_release_calldata(struct nfs4_unlockdata *calldata)
-{
- if (atomic_dec_and_test(&calldata->refcount)) {
- nfs_free_seqid(calldata->luargs.seqid);
- nfs4_put_lock_state(calldata->lsp);
- put_nfs_open_context(calldata->ctx);
- kfree(calldata);
- }
+static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
+ struct nfs_open_context *ctx,
+ struct nfs4_lock_state *lsp,
+ struct nfs_seqid *seqid)
+{
+ struct nfs4_unlockdata *p;
+ struct inode *inode = lsp->ls_state->inode;
+
+ p = kmalloc(sizeof(*p), GFP_KERNEL);
+ if (p == NULL)
+ return NULL;
+ p->arg.fh = NFS_FH(inode);
+ p->arg.fl = &p->fl;
+ p->arg.seqid = seqid;
+ p->arg.stateid = &lsp->ls_stateid;
+ p->lsp = lsp;
+ atomic_inc(&lsp->ls_count);
+ /* Ensure we don't close file until we're done freeing locks! */
+ p->ctx = get_nfs_open_context(ctx);
+ memcpy(&p->fl, fl, sizeof(p->fl));
+ p->server = NFS_SERVER(inode);
+ return p;
}
-static void nfs4_locku_complete(struct nfs4_unlockdata *calldata)
+static void nfs4_locku_release_calldata(void *data)
{
- complete(&calldata->completion);
- nfs4_locku_release_calldata(calldata);
+ struct nfs4_unlockdata *calldata = data;
+ nfs_free_seqid(calldata->arg.seqid);
+ nfs4_put_lock_state(calldata->lsp);
+ put_nfs_open_context(calldata->ctx);
+ kfree(calldata);
}
-static void nfs4_locku_done(struct rpc_task *task)
+static void nfs4_locku_done(struct rpc_task *task, void *data)
{
- struct nfs4_unlockdata *calldata = (struct nfs4_unlockdata *)task->tk_calldata;
+ struct nfs4_unlockdata *calldata = data;
- nfs_increment_lock_seqid(task->tk_status, calldata->luargs.seqid);
+ 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,
- calldata->res.u.stateid.data,
+ calldata->res.stateid.data,
sizeof(calldata->lsp->ls_stateid.data));
break;
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_EXPIRED:
- nfs4_schedule_state_recovery(calldata->res.server->nfs4_state);
+ nfs4_schedule_state_recovery(calldata->server->nfs4_state);
break;
default:
- if (nfs4_async_handle_error(task, calldata->res.server) == -EAGAIN) {
+ if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) {
rpc_restart_call(task);
- return;
}
}
- nfs4_locku_complete(calldata);
}
-static void nfs4_locku_begin(struct rpc_task *task)
+static void nfs4_locku_prepare(struct rpc_task *task, void *data)
{
- struct nfs4_unlockdata *calldata = (struct nfs4_unlockdata *)task->tk_calldata;
+ struct nfs4_unlockdata *calldata = data;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
.rpc_argp = &calldata->arg,
.rpc_resp = &calldata->res,
.rpc_cred = calldata->lsp->ls_state->owner->so_cred,
};
- int status;
- status = nfs_wait_on_sequence(calldata->luargs.seqid, task);
- if (status != 0)
+ if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
return;
if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
- nfs4_locku_complete(calldata);
- task->tk_exit = NULL;
- rpc_exit(task, 0);
+ /* Note: exit _without_ running nfs4_locku_done */
+ task->tk_action = NULL;
return;
}
rpc_call_setup(task, &msg, 0);
}
+static const struct rpc_call_ops nfs4_locku_ops = {
+ .rpc_call_prepare = nfs4_locku_prepare,
+ .rpc_call_done = nfs4_locku_done,
+ .rpc_release = nfs4_locku_release_calldata,
+};
+
+static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
+ struct nfs_open_context *ctx,
+ struct nfs4_lock_state *lsp,
+ struct nfs_seqid *seqid)
+{
+ struct nfs4_unlockdata *data;
+ struct rpc_task *task;
+
+ data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
+ if (data == NULL) {
+ nfs_free_seqid(seqid);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ /* Unlock _before_ we do the RPC call */
+ do_vfs_lock(fl->fl_file, fl);
+ task = rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
+ if (IS_ERR(task))
+ nfs4_locku_release_calldata(data);
+ return task;
+}
+
static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
{
- struct nfs4_unlockdata *calldata;
- struct inode *inode = state->inode;
- struct nfs_server *server = NFS_SERVER(inode);
+ struct nfs_seqid *seqid;
struct nfs4_lock_state *lsp;
- int status;
+ struct rpc_task *task;
+ int status = 0;
/* Is this a delegated lock? */
if (test_bit(NFS_DELEGATED_STATE, &state->flags))
- return do_vfs_lock(request->fl_file, request);
+ goto out_unlock;
+ /* Is this open_owner holding any locks on the server? */
+ if (test_bit(LK_STATE_IN_USE, &state->flags) == 0)
+ goto out_unlock;
status = nfs4_set_lock_state(state, request);
if (status != 0)
- return status;
+ goto out_unlock;
lsp = request->fl_u.nfs4_fl.owner;
- /* We might have lost the locks! */
- if ((lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0)
- return 0;
- calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
- if (calldata == NULL)
- return -ENOMEM;
- calldata->luargs.seqid = nfs_alloc_seqid(&lsp->ls_seqid);
- if (calldata->luargs.seqid == NULL) {
- kfree(calldata);
- return -ENOMEM;
- }
- calldata->luargs.stateid = &lsp->ls_stateid;
- calldata->arg.fh = NFS_FH(inode);
- calldata->arg.type = nfs4_lck_type(cmd, request);
- calldata->arg.offset = request->fl_start;
- calldata->arg.length = nfs4_lck_length(request);
- calldata->arg.u.locku = &calldata->luargs;
- calldata->res.server = server;
- calldata->lsp = lsp;
- atomic_inc(&lsp->ls_count);
-
- /* Ensure we don't close file until we're done freeing locks! */
- calldata->ctx = get_nfs_open_context((struct nfs_open_context*)request->fl_file->private_data);
-
- atomic_set(&calldata->refcount, 2);
- init_completion(&calldata->completion);
-
- status = nfs4_call_async(NFS_SERVER(inode)->client, nfs4_locku_begin,
- nfs4_locku_done, calldata);
- if (status == 0)
- wait_for_completion_interruptible(&calldata->completion);
+ status = -ENOMEM;
+ seqid = nfs_alloc_seqid(&lsp->ls_seqid);
+ if (seqid == NULL)
+ goto out_unlock;
+ task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
+ status = PTR_ERR(task);
+ if (IS_ERR(task))
+ goto out_unlock;
+ status = nfs4_wait_for_completion_rpc_task(task);
+ rpc_release_task(task);
+ return status;
+out_unlock:
do_vfs_lock(request->fl_file, request);
- nfs4_locku_release_calldata(calldata);
return status;
}
-static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *request, int reclaim)
+struct nfs4_lockdata {
+ struct nfs_lock_args arg;
+ struct nfs_lock_res res;
+ struct nfs4_lock_state *lsp;
+ struct nfs_open_context *ctx;
+ struct file_lock fl;
+ int rpc_status;
+ int cancelled;
+};
+
+static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
+ struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
{
- struct inode *inode = state->inode;
+ struct nfs4_lockdata *p;
+ struct inode *inode = lsp->ls_state->inode;
struct nfs_server *server = NFS_SERVER(inode);
- struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
- struct nfs_lock_opargs largs = {
- .lock_stateid = &lsp->ls_stateid,
- .open_stateid = &state->stateid,
- .lock_owner = {
- .clientid = server->nfs4_state->cl_clientid,
- .id = lsp->ls_id,
- },
- .reclaim = reclaim,
- };
- struct nfs_lockargs arg = {
- .fh = NFS_FH(inode),
- .type = nfs4_lck_type(cmd, request),
- .offset = request->fl_start,
- .length = nfs4_lck_length(request),
- .u = {
- .lock = &largs,
- },
- };
- struct nfs_lockres res = {
- .server = server,
- };
+
+ p = kzalloc(sizeof(*p), GFP_KERNEL);
+ if (p == NULL)
+ return NULL;
+
+ p->arg.fh = NFS_FH(inode);
+ p->arg.fl = &p->fl;
+ p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
+ if (p->arg.lock_seqid == NULL)
+ goto out_free;
+ p->arg.lock_stateid = &lsp->ls_stateid;
+ p->arg.lock_owner.clientid = server->nfs4_state->cl_clientid;
+ p->arg.lock_owner.id = lsp->ls_id;
+ p->lsp = lsp;
+ atomic_inc(&lsp->ls_count);
+ p->ctx = get_nfs_open_context(ctx);
+ memcpy(&p->fl, fl, sizeof(p->fl));
+ return p;
+out_free:
+ kfree(p);
+ return NULL;
+}
+
+static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
+{
+ struct nfs4_lockdata *data = calldata;
+ struct nfs4_state *state = data->lsp->ls_state;
+ struct nfs4_state_owner *sp = state->owner;
struct rpc_message msg = {
- .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
- .rpc_argp = &arg,
- .rpc_resp = &res,
- .rpc_cred = state->owner->so_cred,
+ .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
+ .rpc_argp = &data->arg,
+ .rpc_resp = &data->res,
+ .rpc_cred = sp->so_cred,
};
- int status = -ENOMEM;
- largs.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
- if (largs.lock_seqid == NULL)
- return -ENOMEM;
- if (!(lsp->ls_seqid.flags & NFS_SEQID_CONFIRMED)) {
- struct nfs4_state_owner *owner = state->owner;
-
- largs.open_seqid = nfs_alloc_seqid(&owner->so_seqid);
- if (largs.open_seqid == NULL)
+ if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
+ return;
+ dprintk("%s: begin!\n", __FUNCTION__);
+ /* Do we need to do an open_to_lock_owner? */
+ if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
+ data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
+ if (data->arg.open_seqid == NULL) {
+ data->rpc_status = -ENOMEM;
+ task->tk_action = NULL;
goto out;
- largs.new_lock_owner = 1;
- status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
- /* increment open seqid on success, and seqid mutating errors */
- if (largs.new_lock_owner != 0) {
- nfs_increment_open_seqid(status, largs.open_seqid);
- if (status == 0)
- nfs_confirm_seqid(&lsp->ls_seqid, 0);
}
- nfs_free_seqid(largs.open_seqid);
- } else
- status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
- /* increment lock seqid on success, and seqid mutating errors*/
- nfs_increment_lock_seqid(status, largs.lock_seqid);
- /* save the returned stateid. */
- if (status == 0) {
- memcpy(lsp->ls_stateid.data, res.u.stateid.data,
- sizeof(lsp->ls_stateid.data));
- lsp->ls_flags |= NFS_LOCK_INITIALIZED;
- } else if (status == -NFS4ERR_DENIED)
- status = -EAGAIN;
+ data->arg.open_stateid = &state->stateid;
+ data->arg.new_lock_owner = 1;
+ }
+ rpc_call_setup(task, &msg, 0);
out:
- nfs_free_seqid(largs.lock_seqid);
- return status;
+ dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
+}
+
+static void nfs4_lock_done(struct rpc_task *task, void *calldata)
+{
+ struct nfs4_lockdata *data = calldata;
+
+ dprintk("%s: begin!\n", __FUNCTION__);
+
+ data->rpc_status = task->tk_status;
+ 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
+ goto out;
+ }
+ if (data->rpc_status == 0) {
+ memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
+ sizeof(data->lsp->ls_stateid.data));
+ data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
+ }
+ nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
+out:
+ dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
+}
+
+static void nfs4_lock_release(void *calldata)
+{
+ struct nfs4_lockdata *data = calldata;
+
+ dprintk("%s: begin!\n", __FUNCTION__);
+ if (data->arg.open_seqid != NULL)
+ nfs_free_seqid(data->arg.open_seqid);
+ if (data->cancelled != 0) {
+ struct rpc_task *task;
+ task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
+ data->arg.lock_seqid);
+ if (!IS_ERR(task))
+ rpc_release_task(task);
+ dprintk("%s: cancelling lock!\n", __FUNCTION__);
+ } else
+ nfs_free_seqid(data->arg.lock_seqid);
+ nfs4_put_lock_state(data->lsp);
+ put_nfs_open_context(data->ctx);
+ kfree(data);
+ dprintk("%s: done!\n", __FUNCTION__);
+}
+
+static const struct rpc_call_ops nfs4_lock_ops = {
+ .rpc_call_prepare = nfs4_lock_prepare,
+ .rpc_call_done = nfs4_lock_done,
+ .rpc_release = nfs4_lock_release,
+};
+
+static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
+{
+ struct nfs4_lockdata *data;
+ struct rpc_task *task;
+ int ret;
+
+ dprintk("%s: begin!\n", __FUNCTION__);
+ data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
+ fl->fl_u.nfs4_fl.owner);
+ if (data == NULL)
+ return -ENOMEM;
+ if (IS_SETLKW(cmd))
+ data->arg.block = 1;
+ if (reclaim != 0)
+ data->arg.reclaim = 1;
+ task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
+ &nfs4_lock_ops, data);
+ if (IS_ERR(task)) {
+ nfs4_lock_release(data);
+ return PTR_ERR(task);
+ }
+ ret = nfs4_wait_for_completion_rpc_task(task);
+ if (ret == 0) {
+ ret = data->rpc_status;
+ if (ret == -NFS4ERR_DENIED)
+ ret = -EAGAIN;
+ } else
+ data->cancelled = 1;
+ rpc_release_task(task);
+ dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
+ return ret;
}
static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
struct nfs4_client *clp = state->owner->so_client;
int status;
- down_read(&clp->cl_sem);
/* Is this a delegated open? */
- if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
+ if (NFS_I(state->inode)->delegation_state != 0) {
/* Yes: cache locks! */
status = do_vfs_lock(request->fl_file, request);
/* ...but avoid races with delegation recall... */
if (status < 0 || test_bit(NFS_DELEGATED_STATE, &state->flags))
- goto out;
+ return status;
}
+ down_read(&clp->cl_sem);
status = nfs4_set_lock_state(state, request);
if (status != 0)
goto out;
projects / linux-2.6-block.git / blobdiff