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NFS: Switch from intr mount option to TASK_KILLABLE

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By using the TASK_KILLABLE infrastructure, we can get rid of the 'intr'
mount option.  We have to use _killable everywhere instead of _interruptible
as we get rid of rpc_clnt_sigmask/sigunmask.

Signed-off-by: Liam R. Howlett <howlett@gmail.com>
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
This commit is contained in:
Matthew Wilcox 2007-12-06 16:24:39 -05:00 committed by Matthew Wilcox
parent 009e577e07
commit 150030b78a
19 changed files with 30 additions and 147 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
fs/nfs/client.c
View File

@ -302,7 +302,7 @@ found_client:
if (new)
nfs_free_client(new);
error = wait_event_interruptible(nfs_client_active_wq,
error = wait_event_killable(nfs_client_active_wq,
clp->cl_cons_state != NFS_CS_INITING);
if (error < 0) {
nfs_put_client(clp);
@ -494,10 +494,6 @@ static int nfs_init_server_rpcclient(struct nfs_server *server, rpc_authflavor_t
if (server->flags & NFS_MOUNT_SOFT)
server->client->cl_softrtry = 1;
server->client->cl_intr = 0;
if (server->flags & NFS4_MOUNT_INTR)
server->client->cl_intr = 1;
return 0;
}

10
fs/nfs/direct.c
View File

@ -193,7 +193,7 @@ static ssize_t nfs_direct_wait(struct nfs_direct_req *dreq)
if (dreq->iocb)
goto out;
result = wait_for_completion_interruptible(&dreq->completion);
result = wait_for_completion_killable(&dreq->completion);
if (!result)
result = dreq->error;
@ -391,9 +391,7 @@ static ssize_t nfs_direct_read(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
{
ssize_t result = 0;
sigset_t oldset;
struct inode *inode = iocb->ki_filp->f_mapping->host;
struct rpc_clnt *clnt = NFS_CLIENT(inode);
struct nfs_direct_req *dreq;
dreq = nfs_direct_req_alloc();
@ -405,11 +403,9 @@ static ssize_t nfs_direct_read(struct kiocb *iocb, const struct iovec *iov,
if (!is_sync_kiocb(iocb))
dreq->iocb = iocb;
rpc_clnt_sigmask(clnt, &oldset);
result = nfs_direct_read_schedule_iovec(dreq, iov, nr_segs, pos);
if (!result)
result = nfs_direct_wait(dreq);
rpc_clnt_sigunmask(clnt, &oldset);
nfs_direct_req_release(dreq);
return result;
@ -767,9 +763,7 @@ static ssize_t nfs_direct_write(struct kiocb *iocb, const struct iovec *iov,
size_t count)
{
ssize_t result = 0;
sigset_t oldset;
struct inode *inode = iocb->ki_filp->f_mapping->host;
struct rpc_clnt *clnt = NFS_CLIENT(inode);
struct nfs_direct_req *dreq;
size_t wsize = NFS_SERVER(inode)->wsize;
int sync = 0;
@ -787,11 +781,9 @@ static ssize_t nfs_direct_write(struct kiocb *iocb, const struct iovec *iov,
if (!is_sync_kiocb(iocb))
dreq->iocb = iocb;
rpc_clnt_sigmask(clnt, &oldset);
result = nfs_direct_write_schedule_iovec(dreq, iov, nr_segs, pos, sync);
if (!result)
result = nfs_direct_wait(dreq);
rpc_clnt_sigunmask(clnt, &oldset);
nfs_direct_req_release(dreq);
return result;

6
fs/nfs/inode.c
View File

@ -433,15 +433,11 @@ static int nfs_wait_schedule(void *word)
*/
static int nfs_wait_on_inode(struct inode *inode)
{
struct rpc_clnt *clnt = NFS_CLIENT(inode);
struct nfs_inode *nfsi = NFS_I(inode);
sigset_t oldmask;
int error;
rpc_clnt_sigmask(clnt, &oldmask);
error = wait_on_bit_lock(&nfsi->flags, NFS_INO_REVALIDATING,
nfs_wait_schedule, TASK_INTERRUPTIBLE);
rpc_clnt_sigunmask(clnt, &oldmask);
nfs_wait_schedule, TASK_KILLABLE);
return error;
}

2
fs/nfs/mount_clnt.c
View File

@ -56,7 +56,7 @@ int nfs_mount(struct sockaddr *addr, size_t len, char *hostname, char *path,
.program = &mnt_program,
.version = version,
.authflavor = RPC_AUTH_UNIX,
.flags = RPC_CLNT_CREATE_INTR,
.flags = 0,
};
struct rpc_clnt *mnt_clnt;
int status;

7
fs/nfs/nfs3proc.c
View File

@ -27,17 +27,14 @@
static int
nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
{
sigset_t oldset;
int res;
rpc_clnt_sigmask(clnt, &oldset);
do {
res = rpc_call_sync(clnt, msg, flags);
if (res != -EJUKEBOX)
break;
schedule_timeout_interruptible(NFS_JUKEBOX_RETRY_TIME);
schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME);
res = -ERESTARTSYS;
} while (!signalled());
rpc_clnt_sigunmask(clnt, &oldset);
} while (!fatal_signal_pending(current));
return res;
}

27
fs/nfs/nfs4proc.c
View File

@ -316,12 +316,9 @@ static void nfs4_opendata_put(struct nfs4_opendata *p)
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;
}
@ -2806,9 +2803,9 @@ nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
return 0;
}
static int nfs4_wait_bit_interruptible(void *word)
static int nfs4_wait_bit_killable(void *word)
{
if (signal_pending(current))
if (fatal_signal_pending(current))
return -ERESTARTSYS;
schedule();
return 0;
@ -2816,18 +2813,14 @@ static int nfs4_wait_bit_interruptible(void *word)
static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
{
sigset_t oldset;
int res;
might_sleep();
rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
rpc_clnt_sigmask(clnt, &oldset);
res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
nfs4_wait_bit_interruptible,
TASK_INTERRUPTIBLE);
rpc_clnt_sigunmask(clnt, &oldset);
nfs4_wait_bit_killable, TASK_KILLABLE);
rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
return res;
@ -2835,7 +2828,6 @@ static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
{
sigset_t oldset;
int res = 0;
might_sleep();
@ -2844,14 +2836,9 @@ static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
*timeout = NFS4_POLL_RETRY_MIN;
if (*timeout > NFS4_POLL_RETRY_MAX)
*timeout = NFS4_POLL_RETRY_MAX;
rpc_clnt_sigmask(clnt, &oldset);
if (clnt->cl_intr) {
schedule_timeout_interruptible(*timeout);
if (signalled())
res = -ERESTARTSYS;
} else
schedule_timeout_uninterruptible(*timeout);
rpc_clnt_sigunmask(clnt, &oldset);
schedule_timeout_killable(*timeout);
if (fatal_signal_pending(current))
res = -ERESTARTSYS;
*timeout <<= 1;
return res;
}
@ -3085,7 +3072,7 @@ int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4
static unsigned long
nfs4_set_lock_task_retry(unsigned long timeout)
{
schedule_timeout_interruptible(timeout);
schedule_timeout_killable(timeout);
timeout <<= 1;
if (timeout > NFS4_LOCK_MAXTIMEOUT)
return NFS4_LOCK_MAXTIMEOUT;

3
fs/nfs/nfsroot.c
View File

@ -228,10 +228,7 @@ static int __init root_nfs_parse(char *name, char *buf)
nfs_data.flags &= ~NFS_MOUNT_SOFT;
break;
case Opt_intr:
nfs_data.flags |= NFS_MOUNT_INTR;
break;
case Opt_nointr:
nfs_data.flags &= ~NFS_MOUNT_INTR;
break;
case Opt_posix:
nfs_data.flags |= NFS_MOUNT_POSIX;

18
fs/nfs/pagelist.c
View File

@ -67,7 +67,7 @@ nfs_create_request(struct nfs_open_context *ctx, struct inode *inode,
if (req != NULL)
break;
if (signalled() && (server->flags & NFS_MOUNT_INTR))
if (fatal_signal_pending(current))
return ERR_PTR(-ERESTARTSYS);
yield();
}
@ -175,11 +175,11 @@ void nfs_release_request(struct nfs_page *req)
kref_put(&req->wb_kref, nfs_free_request);
}
static int nfs_wait_bit_interruptible(void *word)
static int nfs_wait_bit_killable(void *word)
{
int ret = 0;
if (signal_pending(current))
if (fatal_signal_pending(current))
ret = -ERESTARTSYS;
else
schedule();
@ -190,26 +190,18 @@ static int nfs_wait_bit_interruptible(void *word)
* nfs_wait_on_request - Wait for a request to complete.
* @req: request to wait upon.
*
* Interruptible by signals only if mounted with intr flag.
* Interruptible by fatal signals only.
* The user is responsible for holding a count on the request.
*/
int
nfs_wait_on_request(struct nfs_page *req)
{
struct rpc_clnt *clnt = NFS_CLIENT(req->wb_context->path.dentry->d_inode);
sigset_t oldmask;
int ret = 0;
if (!test_bit(PG_BUSY, &req->wb_flags))
goto out;
/*
* Note: the call to rpc_clnt_sigmask() suffices to ensure that we
* are not interrupted if intr flag is not set
*/
rpc_clnt_sigmask(clnt, &oldmask);
ret = out_of_line_wait_on_bit(&req->wb_flags, PG_BUSY,
nfs_wait_bit_interruptible, TASK_INTERRUPTIBLE);
rpc_clnt_sigunmask(clnt, &oldmask);
nfs_wait_bit_killable, TASK_KILLABLE);
out:
return ret;
}

5
fs/nfs/read.c
View File

@ -212,12 +212,7 @@ nfs_async_read_error(struct list_head *head)
*/
static void nfs_execute_read(struct nfs_read_data *data)
{
struct rpc_clnt *clnt = NFS_CLIENT(data->inode);
sigset_t oldset;
rpc_clnt_sigmask(clnt, &oldset);
rpc_execute(&data->task);
rpc_clnt_sigunmask(clnt, &oldset);
}
/*

4
fs/nfs/super.c
View File

@ -424,7 +424,6 @@ static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss,
const char *nostr;
} nfs_info[] = {
{ NFS_MOUNT_SOFT, ",soft", ",hard" },
{ NFS_MOUNT_INTR, ",intr", ",nointr" },
{ NFS_MOUNT_NOCTO, ",nocto", "" },
{ NFS_MOUNT_NOAC, ",noac", "" },
{ NFS_MOUNT_NONLM, ",nolock", "" },
@ -624,10 +623,7 @@ static int nfs_parse_mount_options(char *raw,
mnt->flags &= ~NFS_MOUNT_SOFT;
break;
case Opt_intr:
mnt->flags |= NFS_MOUNT_INTR;
break;
case Opt_nointr:
mnt->flags &= ~NFS_MOUNT_INTR;
break;
case Opt_posix:
mnt->flags |= NFS_MOUNT_POSIX;

7
fs/nfs/write.c
View File

@ -490,7 +490,7 @@ int nfs_reschedule_unstable_write(struct nfs_page *req)
/*
* Wait for a request to complete.
*
* Interruptible by signals only if mounted with intr flag.
* Interruptible by fatal signals only.
*/
static int nfs_wait_on_requests_locked(struct inode *inode, pgoff_t idx_start, unsigned int npages)
{
@ -816,12 +816,7 @@ static void nfs_write_rpcsetup(struct nfs_page *req,
static void nfs_execute_write(struct nfs_write_data *data)
{
struct rpc_clnt *clnt = NFS_CLIENT(data->inode);
sigset_t oldset;
rpc_clnt_sigmask(clnt, &oldset);
rpc_execute(&data->task);
rpc_clnt_sigunmask(clnt, &oldset);
}
/*

9
include/linux/nfs_fs.h
View File

@ -516,14 +516,7 @@ extern void * nfs_root_data(void);
#define nfs_wait_event(clnt, wq, condition) \
({ \
int __retval = 0; \
if (clnt->cl_intr) { \
sigset_t oldmask; \
rpc_clnt_sigmask(clnt, &oldmask); \
__retval = wait_event_interruptible(wq, condition); \
rpc_clnt_sigunmask(clnt, &oldmask); \
} else \
wait_event(wq, condition); \
int __retval = wait_event_killable(wq, condition); \
__retval; \
})

2
include/linux/nfs_mount.h
View File

@ -48,7 +48,7 @@ struct nfs_mount_data {
/* bits in the flags field */
#define NFS_MOUNT_SOFT 0x0001 /* 1 */
#define NFS_MOUNT_INTR 0x0002 /* 1 */
#define NFS_MOUNT_INTR 0x0002 /* 1 */ /* now unused, but ABI */
#define NFS_MOUNT_SECURE 0x0004 /* 1 */
#define NFS_MOUNT_POSIX 0x0008 /* 1 */
#define NFS_MOUNT_NOCTO 0x0010 /* 1 */

2
include/linux/sunrpc/clnt.h
View File

@ -41,7 +41,6 @@ struct rpc_clnt {
struct rpc_iostats * cl_metrics; /* per-client statistics */
unsigned int cl_softrtry : 1,/* soft timeouts */
cl_intr : 1,/* interruptible */
cl_discrtry : 1,/* disconnect before retry */
cl_autobind : 1;/* use getport() */
@ -109,7 +108,6 @@ struct rpc_create_args {
/* Values for "flags" field */
#define RPC_CLNT_CREATE_HARDRTRY (1UL << 0)
#define RPC_CLNT_CREATE_INTR (1UL << 1)
#define RPC_CLNT_CREATE_AUTOBIND (1UL << 2)
#define RPC_CLNT_CREATE_NONPRIVPORT (1UL << 3)
#define RPC_CLNT_CREATE_NOPING (1UL << 4)

2
include/linux/sunrpc/sched.h
View File

@ -128,7 +128,6 @@ struct rpc_call_ops {
#define RPC_TASK_DYNAMIC 0x0080 /* task was kmalloc'ed */
#define RPC_TASK_KILLED 0x0100 /* task was killed */
#define RPC_TASK_SOFT 0x0200 /* Use soft timeouts */
#define RPC_TASK_NOINTR 0x0400 /* uninterruptible task */
#define RPC_IS_ASYNC(t) ((t)->tk_flags & RPC_TASK_ASYNC)
#define RPC_IS_SWAPPER(t) ((t)->tk_flags & RPC_TASK_SWAPPER)
@ -136,7 +135,6 @@ struct rpc_call_ops {
#define RPC_ASSASSINATED(t) ((t)->tk_flags & RPC_TASK_KILLED)
#define RPC_DO_CALLBACK(t) ((t)->tk_callback != NULL)
#define RPC_IS_SOFT(t) ((t)->tk_flags & RPC_TASK_SOFT)
#define RPC_TASK_UNINTERRUPTIBLE(t) ((t)->tk_flags & RPC_TASK_NOINTR)
#define RPC_TASK_RUNNING 0
#define RPC_TASK_QUEUED 1

47
net/sunrpc/clnt.c
View File

@ -281,7 +281,7 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args)
return clnt;
if (!(args->flags & RPC_CLNT_CREATE_NOPING)) {
int err = rpc_ping(clnt, RPC_TASK_SOFT|RPC_TASK_NOINTR);
int err = rpc_ping(clnt, RPC_TASK_SOFT);
if (err != 0) {
rpc_shutdown_client(clnt);
return ERR_PTR(err);
@ -292,8 +292,6 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args)
if (args->flags & RPC_CLNT_CREATE_HARDRTRY)
clnt->cl_softrtry = 0;
if (args->flags & RPC_CLNT_CREATE_INTR)
clnt->cl_intr = 1;
if (args->flags & RPC_CLNT_CREATE_AUTOBIND)
clnt->cl_autobind = 1;
if (args->flags & RPC_CLNT_CREATE_DISCRTRY)
@ -459,7 +457,7 @@ struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *old,
clnt->cl_prog = program->number;
clnt->cl_vers = version->number;
clnt->cl_stats = program->stats;
err = rpc_ping(clnt, RPC_TASK_SOFT|RPC_TASK_NOINTR);
err = rpc_ping(clnt, RPC_TASK_SOFT);
if (err != 0) {
rpc_shutdown_client(clnt);
clnt = ERR_PTR(err);
@ -480,44 +478,6 @@ static const struct rpc_call_ops rpc_default_ops = {
.rpc_call_done = rpc_default_callback,
};
/*
* Export the signal mask handling for synchronous code that
* sleeps on RPC calls
*/
#define RPC_INTR_SIGNALS (sigmask(SIGHUP) | sigmask(SIGINT) | sigmask(SIGQUIT) | sigmask(SIGTERM))
static void rpc_save_sigmask(sigset_t *oldset, int intr)
{
unsigned long sigallow = sigmask(SIGKILL);
sigset_t sigmask;
/* Block all signals except those listed in sigallow */
if (intr)
sigallow |= RPC_INTR_SIGNALS;
siginitsetinv(&sigmask, sigallow);
sigprocmask(SIG_BLOCK, &sigmask, oldset);
}
static inline void rpc_task_sigmask(struct rpc_task *task, sigset_t *oldset)
{
rpc_save_sigmask(oldset, !RPC_TASK_UNINTERRUPTIBLE(task));
}
static inline void rpc_restore_sigmask(sigset_t *oldset)
{
sigprocmask(SIG_SETMASK, oldset, NULL);
}
void rpc_clnt_sigmask(struct rpc_clnt *clnt, sigset_t *oldset)
{
rpc_save_sigmask(oldset, clnt->cl_intr);
}
void rpc_clnt_sigunmask(struct rpc_clnt *clnt, sigset_t *oldset)
{
rpc_restore_sigmask(oldset);
}
static
struct rpc_task *rpc_do_run_task(struct rpc_clnt *clnt,
struct rpc_message *msg,
@ -526,7 +486,6 @@ struct rpc_task *rpc_do_run_task(struct rpc_clnt *clnt,
void *data)
{
struct rpc_task *task, *ret;
sigset_t oldset;
task = rpc_new_task(clnt, flags, ops, data);
if (task == NULL) {
@ -535,7 +494,6 @@ struct rpc_task *rpc_do_run_task(struct rpc_clnt *clnt,
}
/* Mask signals on synchronous RPC calls and RPCSEC_GSS upcalls */
rpc_task_sigmask(task, &oldset);
if (msg != NULL) {
rpc_call_setup(task, msg, 0);
if (task->tk_status != 0) {
@ -548,7 +506,6 @@ struct rpc_task *rpc_do_run_task(struct rpc_clnt *clnt,
rpc_execute(task);
ret = task;
out:
rpc_restore_sigmask(&oldset);
return ret;
}

3
net/sunrpc/rpcb_clnt.c
View File

@ -172,8 +172,7 @@ static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
.program = &rpcb_program,
.version = version,
.authflavor = RPC_AUTH_UNIX,
.flags = (RPC_CLNT_CREATE_NOPING |
RPC_CLNT_CREATE_INTR),
.flags = RPC_CLNT_CREATE_NOPING,
};
switch (srvaddr->sa_family) {

15
net/sunrpc/sched.c
View File

@ -245,9 +245,9 @@ void rpc_init_wait_queue(struct rpc_wait_queue *queue, const char *qname)
}
EXPORT_SYMBOL(rpc_init_wait_queue);
static int rpc_wait_bit_interruptible(void *word)
static int rpc_wait_bit_killable(void *word)
{
if (signal_pending(current))
if (fatal_signal_pending(current))
return -ERESTARTSYS;
schedule();
return 0;
@ -299,9 +299,9 @@ static void rpc_mark_complete_task(struct rpc_task *task)
int __rpc_wait_for_completion_task(struct rpc_task *task, int (*action)(void *))
{
if (action == NULL)
action = rpc_wait_bit_interruptible;
action = rpc_wait_bit_killable;
return wait_on_bit(&task->tk_runstate, RPC_TASK_ACTIVE,
action, TASK_INTERRUPTIBLE);
action, TASK_KILLABLE);
}
EXPORT_SYMBOL(__rpc_wait_for_completion_task);
@ -690,10 +690,9 @@ static void __rpc_execute(struct rpc_task *task)
/* sync task: sleep here */
dprintk("RPC: %5u sync task going to sleep\n", task->tk_pid);
/* Note: Caller should be using rpc_clnt_sigmask() */
status = out_of_line_wait_on_bit(&task->tk_runstate,
RPC_TASK_QUEUED, rpc_wait_bit_interruptible,
TASK_INTERRUPTIBLE);
RPC_TASK_QUEUED, rpc_wait_bit_killable,
TASK_KILLABLE);
if (status == -ERESTARTSYS) {
/*
* When a sync task receives a signal, it exits with
@ -837,8 +836,6 @@ void rpc_init_task(struct rpc_task *task, struct rpc_clnt *clnt, int flags, cons
kref_get(&clnt->cl_kref);
if (clnt->cl_softrtry)
task->tk_flags |= RPC_TASK_SOFT;
if (!clnt->cl_intr)
task->tk_flags |= RPC_TASK_NOINTR;
}
BUG_ON(task->tk_ops == NULL);

2
net/sunrpc/sunrpc_syms.c
View File

@ -38,8 +38,6 @@ EXPORT_SYMBOL(rpc_killall_tasks);
EXPORT_SYMBOL(rpc_call_sync);
EXPORT_SYMBOL(rpc_call_async);
EXPORT_SYMBOL(rpc_call_setup);
EXPORT_SYMBOL(rpc_clnt_sigmask);
EXPORT_SYMBOL(rpc_clnt_sigunmask);
EXPORT_SYMBOL(rpc_delay);
EXPORT_SYMBOL(rpc_restart_call);
EXPORT_SYMBOL(rpc_setbufsize);