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Commit e4bdda1b authored by Linus Torvalds's avatar Linus Torvalds
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Merge branch 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6 

* 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6:
  NFSv4: Fix a regression in the NFSv4 state manager
  NFSv4: Release the sequence id before restarting a CLOSE rpc call
  nfs41: fix session fore channel negotiation
  nfs41: do not zero seqid portion of stateid on close
  nfs: run state manager in privileged mode
  nfs: make recovery state manager operations privileged
  nfs: enforce FIFO ordering of operations trying to acquire slot
  rpc: add a new priority in RPC task
  nfs: remove rpc_task argument from nfs4_find_slot
  rpc: add rpc_queue_empty function
  nfs: change nfs4_do_setlk params to identify recovery type
  nfs: do not do a LOOKUP after open
  nfs: minor cleanup of session draining
parents 74f3ae74 38045412
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Showing with 223 additions and 74 deletions
fs/nfs/nfs4_fs.h
View file @ e4bdda1b
......@@ -108,6 +108,10 @@ enum {
NFS_OWNER_RECLAIM_NOGRACE
};
#define NFS_LOCK_NEW 0
#define NFS_LOCK_RECLAIM 1
#define NFS_LOCK_EXPIRED 2
/*
* struct nfs4_state maintains the client-side state for a given
* (state_owner,inode) tuple (OPEN) or state_owner (LOCK).
......@@ -282,6 +286,7 @@ extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter);
extern int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task);
extern void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid);
extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid);
extern void nfs_release_seqid(struct nfs_seqid *seqid);
extern void nfs_free_seqid(struct nfs_seqid *seqid);
extern const nfs4_stateid zero_stateid;
......
fs/nfs/nfs4proc.c
View file @ e4bdda1b
......@@ -64,6 +64,7 @@
struct nfs4_opendata;
static int _nfs4_proc_open(struct nfs4_opendata *data);
static int _nfs4_recover_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 *, struct nfs4_state *);
static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
......@@ -341,6 +342,27 @@ nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
free_slotid, tbl->highest_used_slotid);
}
/*
* Signal state manager thread if session is drained
*/
static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
{
struct rpc_task *task;
if (!test_bit(NFS4CLNT_SESSION_DRAINING, &ses->clp->cl_state)) {
task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
if (task)
rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
return;
}
if (ses->fc_slot_table.highest_used_slotid != -1)
return;
dprintk("%s COMPLETE: Session Drained\n", __func__);
complete(&ses->complete);
}
static void nfs41_sequence_free_slot(const struct nfs_client *clp,
struct nfs4_sequence_res *res)
{
......@@ -356,15 +378,7 @@ static void nfs41_sequence_free_slot(const struct nfs_client *clp,
spin_lock(&tbl->slot_tbl_lock);
nfs4_free_slot(tbl, res->sr_slotid);
/* Signal state manager thread if session is drained */
if (test_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state)) {
if (tbl->highest_used_slotid == -1) {
dprintk("%s COMPLETE: Session Drained\n", __func__);
complete(&clp->cl_session->complete);
}
} else
rpc_wake_up_next(&tbl->slot_tbl_waitq);
nfs41_check_drain_session_complete(clp->cl_session);
spin_unlock(&tbl->slot_tbl_lock);
res->sr_slotid = NFS4_MAX_SLOT_TABLE;
}
......@@ -421,7 +435,7 @@ static void nfs41_sequence_done(struct nfs_client *clp,
* Note: must be called with under the slot_tbl_lock.
*/
static u8
nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
nfs4_find_slot(struct nfs4_slot_table *tbl)
{
int slotid;
u8 ret_id = NFS4_MAX_SLOT_TABLE;
......@@ -463,7 +477,8 @@ static int nfs41_setup_sequence(struct nfs4_session *session,
tbl = &session->fc_slot_table;
spin_lock(&tbl->slot_tbl_lock);
if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state)) {
if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state) &&
!rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
/*
* The state manager will wait until the slot table is empty.
* Schedule the reset thread
......@@ -474,7 +489,15 @@ static int nfs41_setup_sequence(struct nfs4_session *session,
return -EAGAIN;
}
slotid = nfs4_find_slot(tbl, task);
if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
!rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
spin_unlock(&tbl->slot_tbl_lock);
dprintk("%s enforce FIFO order\n", __func__);
return -EAGAIN;
}
slotid = nfs4_find_slot(tbl);
if (slotid == NFS4_MAX_SLOT_TABLE) {
rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
spin_unlock(&tbl->slot_tbl_lock);
......@@ -483,6 +506,7 @@ static int nfs41_setup_sequence(struct nfs4_session *session,
}
spin_unlock(&tbl->slot_tbl_lock);
rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
slot = tbl->slots + slotid;
args->sa_session = session;
args->sa_slotid = slotid;
......@@ -545,6 +569,12 @@ static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
rpc_call_start(task);
}
static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
{
rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
nfs41_call_sync_prepare(task, calldata);
}
static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
{
struct nfs41_call_sync_data *data = calldata;
......@@ -557,12 +587,18 @@ struct rpc_call_ops nfs41_call_sync_ops = {
.rpc_call_done = nfs41_call_sync_done,
};
struct rpc_call_ops nfs41_call_priv_sync_ops = {
.rpc_call_prepare = nfs41_call_priv_sync_prepare,
.rpc_call_done = nfs41_call_sync_done,
};
static int nfs4_call_sync_sequence(struct nfs_client *clp,
struct rpc_clnt *clnt,
struct rpc_message *msg,
struct nfs4_sequence_args *args,
struct nfs4_sequence_res *res,
int cache_reply)
int cache_reply,
int privileged)
{
int ret;
struct rpc_task *task;
......@@ -580,6 +616,8 @@ static int nfs4_call_sync_sequence(struct nfs_client *clp,
};
res->sr_slotid = NFS4_MAX_SLOT_TABLE;
if (privileged)
task_setup.callback_ops = &nfs41_call_priv_sync_ops;
task = rpc_run_task(&task_setup);
if (IS_ERR(task))
ret = PTR_ERR(task);
......@@ -597,7 +635,7 @@ int _nfs4_call_sync_session(struct nfs_server *server,
int cache_reply)
{
return nfs4_call_sync_sequence(server->nfs_client, server->client,
msg, args, res, cache_reply);
msg, args, res, cache_reply, 0);
}
#endif /* CONFIG_NFS_V4_1 */
......@@ -1035,7 +1073,7 @@ static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmod
memset(&opendata->o_res, 0, sizeof(opendata->o_res));
memset(&opendata->c_res, 0, sizeof(opendata->c_res));
nfs4_init_opendata_res(opendata);
ret = _nfs4_proc_open(opendata);
ret = _nfs4_recover_proc_open(opendata);
if (ret != 0)
return ret;
newstate = nfs4_opendata_to_nfs4_state(opendata);
......@@ -1326,6 +1364,12 @@ static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
}
static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
{
rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
nfs4_open_prepare(task, calldata);
}
static void nfs4_open_done(struct rpc_task *task, void *calldata)
{
struct nfs4_opendata *data = calldata;
......@@ -1384,10 +1428,13 @@ static const struct rpc_call_ops nfs4_open_ops = {
.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)
static const struct rpc_call_ops nfs4_recover_open_ops = {
.rpc_call_prepare = nfs4_recover_open_prepare,
.rpc_call_done = nfs4_open_done,
.rpc_release = nfs4_open_release,
};
static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
{
struct inode *dir = data->dir->d_inode;
struct nfs_server *server = NFS_SERVER(dir);
......@@ -1414,6 +1461,8 @@ static int _nfs4_proc_open(struct nfs4_opendata *data)
data->rpc_done = 0;
data->rpc_status = 0;
data->cancelled = 0;
if (isrecover)
task_setup_data.callback_ops = &nfs4_recover_open_ops;
task = rpc_run_task(&task_setup_data);
if (IS_ERR(task))
return PTR_ERR(task);
......@@ -1424,11 +1473,45 @@ static int _nfs4_proc_open(struct nfs4_opendata *data)
} else
status = data->rpc_status;
rpc_put_task(task);
return status;
}
static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
{
struct inode *dir = data->dir->d_inode;
struct nfs_openres *o_res = &data->o_res;
int status;
status = nfs4_run_open_task(data, 1);
if (status != 0 || !data->rpc_done)
return status;
if (o_res->fh.size == 0)
_nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
nfs_refresh_inode(dir, o_res->dir_attr);
if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
status = _nfs4_proc_open_confirm(data);
if (status != 0)
return status;
}
return status;
}
/*
* 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;
int status;
status = nfs4_run_open_task(data, 0);
if (status != 0 || !data->rpc_done)
return status;
if (o_arg->open_flags & O_CREAT) {
update_changeattr(dir, &o_res->cinfo);
......@@ -1752,11 +1835,10 @@ static void nfs4_close_done(struct rpc_task *task, void *data)
if (calldata->arg.fmode == 0)
break;
default:
if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
nfs_restart_rpc(task, server->nfs_client);
return;
}
if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
rpc_restart_call_prepare(task);
}
nfs_release_seqid(calldata->arg.seqid);
nfs_refresh_inode(calldata->inode, calldata->res.fattr);
}
......@@ -1848,8 +1930,6 @@ int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
calldata->state = state;
calldata->arg.fh = NFS_FH(state->inode);
calldata->arg.stateid = &state->open_stateid;
if (nfs4_has_session(server->nfs_client))
memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */
/* Serialization for the sequence id */
calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
if (calldata->arg.seqid == NULL)
......@@ -3941,6 +4021,12 @@ static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
}
static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
{
rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
nfs4_lock_prepare(task, calldata);
}
static void nfs4_lock_done(struct rpc_task *task, void *calldata)
{
struct nfs4_lockdata *data = calldata;
......@@ -3996,7 +4082,13 @@ static const struct rpc_call_ops nfs4_lock_ops = {
.rpc_release = nfs4_lock_release,
};
static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
static const struct rpc_call_ops nfs4_recover_lock_ops = {
.rpc_call_prepare = nfs4_recover_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 recovery_type)
{
struct nfs4_lockdata *data;
struct rpc_task *task;
......@@ -4020,8 +4112,11 @@ static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *f
return -ENOMEM;
if (IS_SETLKW(cmd))
data->arg.block = 1;
if (reclaim != 0)
data->arg.reclaim = 1;
if (recovery_type > NFS_LOCK_NEW) {
if (recovery_type == NFS_LOCK_RECLAIM)
data->arg.reclaim = NFS_LOCK_RECLAIM;
task_setup_data.callback_ops = &nfs4_recover_lock_ops;
}
msg.rpc_argp = &data->arg,
msg.rpc_resp = &data->res,
task_setup_data.callback_data = data;
......@@ -4048,7 +4143,7 @@ static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request
/* Cache the lock if possible... */
if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
return 0;
err = _nfs4_do_setlk(state, F_SETLK, request, 1);
err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
if (err != -NFS4ERR_DELAY)
break;
nfs4_handle_exception(server, err, &exception);
......@@ -4068,7 +4163,7 @@ static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request
do {
if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
return 0;
err = _nfs4_do_setlk(state, F_SETLK, request, 0);
err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
switch (err) {
default:
goto out;
......@@ -4104,7 +4199,7 @@ static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock
status = do_vfs_lock(request->fl_file, request);
goto out_unlock;
}
status = _nfs4_do_setlk(state, cmd, request, 0);
status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
if (status != 0)
goto out_unlock;
/* Note: we always want to sleep here! */
......@@ -4187,7 +4282,7 @@ int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
if (err != 0)
goto out;
do {
err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
switch (err) {
default:
printk(KERN_ERR "%s: unhandled error %d.\n",
......@@ -4395,6 +4490,7 @@ static void nfs4_get_lease_time_prepare(struct rpc_task *task,
(struct nfs4_get_lease_time_data *)calldata;
dprintk("--> %s\n", __func__);
rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
/* just setup sequence, do not trigger session recovery
since we're invoked within one */
ret = nfs41_setup_sequence(data->clp->cl_session,
......@@ -4619,7 +4715,7 @@ struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
tbl = &session->fc_slot_table;
tbl->highest_used_slotid = -1;
spin_lock_init(&tbl->slot_tbl_lock);
rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
tbl = &session->bc_slot_table;
tbl->highest_used_slotid = -1;
......@@ -4838,14 +4934,22 @@ int nfs4_init_session(struct nfs_server *server)
{
struct nfs_client *clp = server->nfs_client;
struct nfs4_session *session;
unsigned int rsize, wsize;
int ret;
if (!nfs4_has_session(clp))
return 0;
rsize = server->rsize;
if (rsize == 0)
rsize = NFS_MAX_FILE_IO_SIZE;
wsize = server->wsize;
if (wsize == 0)
wsize = NFS_MAX_FILE_IO_SIZE;
session = clp->cl_session;
session->fc_attrs.max_rqst_sz = server->wsize + nfs41_maxwrite_overhead;
session->fc_attrs.max_resp_sz = server->rsize + nfs41_maxread_overhead;
session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
ret = nfs4_recover_expired_lease(server);
if (!ret)
......@@ -4871,7 +4975,7 @@ static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
args.sa_cache_this = 0;
return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
&res, 0);
&res, args.sa_cache_this, 1);
}
void nfs41_sequence_call_done(struct rpc_task *task, void *data)
......@@ -4953,6 +5057,7 @@ static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
{
struct nfs4_reclaim_complete_data *calldata = data;
rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
&calldata->res.seq_res, 0, task))
return;
......
fs/nfs/nfs4state.c
View file @ e4bdda1b
......@@ -135,16 +135,30 @@ static int nfs41_setup_state_renewal(struct nfs_client *clp)
return status;
}
static void nfs41_end_drain_session(struct nfs_client *clp,
struct nfs4_session *ses)
static void nfs4_end_drain_session(struct nfs_client *clp)
{
if (test_and_clear_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state))
rpc_wake_up(&ses->fc_slot_table.slot_tbl_waitq);
struct nfs4_session *ses = clp->cl_session;
int max_slots;
if (test_and_clear_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state)) {
spin_lock(&ses->fc_slot_table.slot_tbl_lock);
max_slots = ses->fc_slot_table.max_slots;
while (max_slots--) {
struct rpc_task *task;
task = rpc_wake_up_next(&ses->fc_slot_table.
slot_tbl_waitq);
if (!task)
break;
rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
}
spin_unlock(&ses->fc_slot_table.slot_tbl_lock);
}
}
static int nfs41_begin_drain_session(struct nfs_client *clp,
struct nfs4_session *ses)
static int nfs4_begin_drain_session(struct nfs_client *clp)
{
struct nfs4_session *ses = clp->cl_session;
struct nfs4_slot_table *tbl = &ses->fc_slot_table;
spin_lock(&tbl->slot_tbl_lock);
......@@ -162,16 +176,13 @@ int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred)
{
int status;
status = nfs41_begin_drain_session(clp, clp->cl_session);
if (status != 0)
goto out;
nfs4_begin_drain_session(clp);
status = nfs4_proc_exchange_id(clp, cred);
if (status != 0)
goto out;
status = nfs4_proc_create_session(clp);
if (status != 0)
goto out;
nfs41_end_drain_session(clp, clp->cl_session);
nfs41_setup_state_renewal(clp);
nfs_mark_client_ready(clp, NFS_CS_READY);
out:
......@@ -755,16 +766,21 @@ struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter)
return new;
}
void nfs_free_seqid(struct nfs_seqid *seqid)
void nfs_release_seqid(struct nfs_seqid *seqid)
{
if (!list_empty(&seqid->list)) {
struct rpc_sequence *sequence = seqid->sequence->sequence;
spin_lock(&sequence->lock);
list_del(&seqid->list);
list_del_init(&seqid->list);
spin_unlock(&sequence->lock);
rpc_wake_up(&sequence->wait);
}
}
void nfs_free_seqid(struct nfs_seqid *seqid)
{
nfs_release_seqid(seqid);
kfree(seqid);
}
......@@ -1257,13 +1273,9 @@ void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags)
static int nfs4_reset_session(struct nfs_client *clp)
{
struct nfs4_session *ses = clp->cl_session;
int status;
status = nfs41_begin_drain_session(clp, ses);
if (status != 0)
return status;
nfs4_begin_drain_session(clp);
status = nfs4_proc_destroy_session(clp->cl_session);
if (status && status != -NFS4ERR_BADSESSION &&
status != -NFS4ERR_DEADSESSION) {
......@@ -1279,19 +1291,17 @@ static int nfs4_reset_session(struct nfs_client *clp)
out:
/*
* Let the state manager reestablish state
* without waking other tasks yet.
*/
if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) {
/* Wake up the next rpc task */
nfs41_end_drain_session(clp, ses);
if (status == 0)
if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
status == 0)
nfs41_setup_state_renewal(clp);
}
return status;
}
#else /* CONFIG_NFS_V4_1 */
static int nfs4_reset_session(struct nfs_client *clp) { return 0; }
static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; }
#endif /* CONFIG_NFS_V4_1 */
/* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors
......@@ -1382,6 +1392,7 @@ static void nfs4_state_manager(struct nfs_client *clp)
goto out_error;
}
nfs4_end_drain_session(clp);
if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) {
nfs_client_return_marked_delegations(clp);
continue;
......@@ -1398,6 +1409,7 @@ static void nfs4_state_manager(struct nfs_client *clp)
out_error:
printk(KERN_WARNING "Error: state manager failed on NFSv4 server %s"
" with error %d\n", clp->cl_hostname, -status);
nfs4_end_drain_session(clp);
nfs4_clear_state_manager_bit(clp);
}
......
include/linux/sunrpc/sched.h
View file @ e4bdda1b
......@@ -173,7 +173,8 @@ struct rpc_task_setup {
#define RPC_PRIORITY_LOW (-1)
#define RPC_PRIORITY_NORMAL (0)
#define RPC_PRIORITY_HIGH (1)
#define RPC_NR_PRIORITY (1 + RPC_PRIORITY_HIGH - RPC_PRIORITY_LOW)
#define RPC_PRIORITY_PRIVILEGED (2)
#define RPC_NR_PRIORITY (1 + RPC_PRIORITY_PRIVILEGED - RPC_PRIORITY_LOW)
struct rpc_timer {
struct timer_list timer;
......@@ -229,6 +230,7 @@ void rpc_wake_up_queued_task(struct rpc_wait_queue *,
void rpc_wake_up(struct rpc_wait_queue *);
struct rpc_task *rpc_wake_up_next(struct rpc_wait_queue *);
void rpc_wake_up_status(struct rpc_wait_queue *, int);
int rpc_queue_empty(struct rpc_wait_queue *);
void rpc_delay(struct rpc_task *, unsigned long);
void * rpc_malloc(struct rpc_task *, size_t);
void rpc_free(void *);
......@@ -254,6 +256,16 @@ static inline int rpc_wait_for_completion_task(struct rpc_task *task)
return __rpc_wait_for_completion_task(task, NULL);
}
static inline void rpc_task_set_priority(struct rpc_task *task, unsigned char prio)
{
task->tk_priority = prio - RPC_PRIORITY_LOW;
}
static inline int rpc_task_has_priority(struct rpc_task *task, unsigned char prio)
{
return (task->tk_priority + RPC_PRIORITY_LOW == prio);
}
#ifdef RPC_DEBUG
static inline const char * rpc_qname(struct rpc_wait_queue *q)
{
......
net/sunrpc/sched.c
View file @ e4bdda1b
......@@ -210,6 +210,7 @@ void rpc_init_priority_wait_queue(struct rpc_wait_queue *queue, const char *qnam
{
__rpc_init_priority_wait_queue(queue, qname, RPC_NR_PRIORITY);
}
EXPORT_SYMBOL_GPL(rpc_init_priority_wait_queue);
void rpc_init_wait_queue(struct rpc_wait_queue *queue, const char *qname)
{
......@@ -384,6 +385,20 @@ static void rpc_wake_up_task_queue_locked(struct rpc_wait_queue *queue, struct r
__rpc_do_wake_up_task(queue, task);
}
/*
* Tests whether rpc queue is empty
*/
int rpc_queue_empty(struct rpc_wait_queue *queue)
{
int res;
spin_lock_bh(&queue->lock);
res = queue->qlen;
spin_unlock_bh(&queue->lock);
return (res == 0);
}
EXPORT_SYMBOL_GPL(rpc_queue_empty);
/*
* Wake up a task on a specific queue
*/
......
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