#include <linux/net.h>
#include <linux/in.h>
#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
#include <linux/sunrpc/types.h>
#include <linux/sunrpc/xdr.h>
/*
* Create an RPC service
*/
-struct svc_serv *
-svc_create(struct svc_program *prog, unsigned int bufsize)
+static struct svc_serv *
+__svc_create(struct svc_program *prog, unsigned int bufsize, int npools,
+ void (*shutdown)(struct svc_serv *serv))
{
struct svc_serv *serv;
int vers;
unsigned int xdrsize;
+ unsigned int i;
- if (!(serv = (struct svc_serv *) kmalloc(sizeof(*serv), GFP_KERNEL)))
+ if (!(serv = kzalloc(sizeof(*serv), GFP_KERNEL)))
return NULL;
- memset(serv, 0, sizeof(*serv));
serv->sv_name = prog->pg_name;
serv->sv_program = prog;
serv->sv_nrthreads = 1;
serv->sv_stats = prog->pg_stats;
serv->sv_bufsz = bufsize? bufsize : 4096;
+ serv->sv_shutdown = shutdown;
xdrsize = 0;
while (prog) {
prog->pg_lovers = prog->pg_nvers-1;
prog = prog->pg_next;
}
serv->sv_xdrsize = xdrsize;
- INIT_LIST_HEAD(&serv->sv_threads);
- INIT_LIST_HEAD(&serv->sv_sockets);
INIT_LIST_HEAD(&serv->sv_tempsocks);
INIT_LIST_HEAD(&serv->sv_permsocks);
+ init_timer(&serv->sv_temptimer);
spin_lock_init(&serv->sv_lock);
+ serv->sv_nrpools = npools;
+ serv->sv_pools =
+ kcalloc(sizeof(struct svc_pool), serv->sv_nrpools,
+ GFP_KERNEL);
+ if (!serv->sv_pools) {
+ kfree(serv);
+ return NULL;
+ }
+
+ for (i = 0; i < serv->sv_nrpools; i++) {
+ struct svc_pool *pool = &serv->sv_pools[i];
+
+ dprintk("initialising pool %u for %s\n",
+ i, serv->sv_name);
+
+ pool->sp_id = i;
+ INIT_LIST_HEAD(&pool->sp_threads);
+ INIT_LIST_HEAD(&pool->sp_sockets);
+ INIT_LIST_HEAD(&pool->sp_all_threads);
+ spin_lock_init(&pool->sp_lock);
+ }
+
+
/* Remove any stale portmap registrations */
svc_register(serv, 0, 0);
return serv;
}
+struct svc_serv *
+svc_create(struct svc_program *prog, unsigned int bufsize,
+ void (*shutdown)(struct svc_serv *serv))
+{
+ return __svc_create(prog, bufsize, /*npools*/1, shutdown);
+}
+
+struct svc_serv *
+svc_create_pooled(struct svc_program *prog, unsigned int bufsize,
+ void (*shutdown)(struct svc_serv *serv),
+ svc_thread_fn func, int sig, struct module *mod)
+{
+ struct svc_serv *serv;
+
+ serv = __svc_create(prog, bufsize, /*npools*/1, shutdown);
+
+ if (serv != NULL) {
+ serv->sv_function = func;
+ serv->sv_kill_signal = sig;
+ serv->sv_module = mod;
+ }
+
+ return serv;
+}
+
/*
- * Destroy an RPC service
+ * Destroy an RPC service. Should be called with the BKL held
*/
void
svc_destroy(struct svc_serv *serv)
} else
printk("svc_destroy: no threads for serv=%p!\n", serv);
+ del_timer_sync(&serv->sv_temptimer);
+
while (!list_empty(&serv->sv_tempsocks)) {
svsk = list_entry(serv->sv_tempsocks.next,
struct svc_sock,
sk_list);
svc_delete_socket(svsk);
}
+ if (serv->sv_shutdown)
+ serv->sv_shutdown(serv);
+
while (!list_empty(&serv->sv_permsocks)) {
svsk = list_entry(serv->sv_permsocks.next,
struct svc_sock,
/* Unregister service with the portmapper */
svc_register(serv, 0, 0);
+ kfree(serv->sv_pools);
kfree(serv);
}
rqstp->rq_argused = 0;
rqstp->rq_resused = 0;
arghi = 0;
- if (pages > RPCSVC_MAXPAGES)
- BUG();
+ BUG_ON(pages > RPCSVC_MAXPAGES);
while (pages) {
struct page *p = alloc_page(GFP_KERNEL);
if (!p)
}
/*
- * Create a server thread
+ * Create a thread in the given pool. Caller must hold BKL.
*/
-int
-svc_create_thread(svc_thread_fn func, struct svc_serv *serv)
+static int
+__svc_create_thread(svc_thread_fn func, struct svc_serv *serv,
+ struct svc_pool *pool)
{
struct svc_rqst *rqstp;
int error = -ENOMEM;
- rqstp = kmalloc(sizeof(*rqstp), GFP_KERNEL);
+ rqstp = kzalloc(sizeof(*rqstp), GFP_KERNEL);
if (!rqstp)
goto out;
- memset(rqstp, 0, sizeof(*rqstp));
init_waitqueue_head(&rqstp->rq_wait);
- if (!(rqstp->rq_argp = (u32 *) kmalloc(serv->sv_xdrsize, GFP_KERNEL))
- || !(rqstp->rq_resp = (u32 *) kmalloc(serv->sv_xdrsize, GFP_KERNEL))
+ if (!(rqstp->rq_argp = kmalloc(serv->sv_xdrsize, GFP_KERNEL))
+ || !(rqstp->rq_resp = kmalloc(serv->sv_xdrsize, GFP_KERNEL))
|| !svc_init_buffer(rqstp, serv->sv_bufsz))
goto out_thread;
serv->sv_nrthreads++;
+ spin_lock_bh(&pool->sp_lock);
+ pool->sp_nrthreads++;
+ list_add(&rqstp->rq_all, &pool->sp_all_threads);
+ spin_unlock_bh(&pool->sp_lock);
rqstp->rq_server = serv;
+ rqstp->rq_pool = pool;
error = kernel_thread((int (*)(void *)) func, rqstp, 0);
if (error < 0)
goto out_thread;
}
/*
- * Destroy an RPC server thread
+ * Create a thread in the default pool. Caller must hold BKL.
+ */
+int
+svc_create_thread(svc_thread_fn func, struct svc_serv *serv)
+{
+ return __svc_create_thread(func, serv, &serv->sv_pools[0]);
+}
+
+/*
+ * Choose a pool in which to create a new thread, for svc_set_num_threads
+ */
+static inline struct svc_pool *
+choose_pool(struct svc_serv *serv, struct svc_pool *pool, unsigned int *state)
+{
+ if (pool != NULL)
+ return pool;
+
+ return &serv->sv_pools[(*state)++ % serv->sv_nrpools];
+}
+
+/*
+ * Choose a thread to kill, for svc_set_num_threads
+ */
+static inline struct task_struct *
+choose_victim(struct svc_serv *serv, struct svc_pool *pool, unsigned int *state)
+{
+ unsigned int i;
+ struct task_struct *task = NULL;
+
+ if (pool != NULL) {
+ spin_lock_bh(&pool->sp_lock);
+ } else {
+ /* choose a pool in round-robin fashion */
+ for (i = 0; i < serv->sv_nrpools; i++) {
+ pool = &serv->sv_pools[--(*state) % serv->sv_nrpools];
+ spin_lock_bh(&pool->sp_lock);
+ if (!list_empty(&pool->sp_all_threads))
+ goto found_pool;
+ spin_unlock_bh(&pool->sp_lock);
+ }
+ return NULL;
+ }
+
+found_pool:
+ if (!list_empty(&pool->sp_all_threads)) {
+ struct svc_rqst *rqstp;
+
+ /*
+ * Remove from the pool->sp_all_threads list
+ * so we don't try to kill it again.
+ */
+ rqstp = list_entry(pool->sp_all_threads.next, struct svc_rqst, rq_all);
+ list_del_init(&rqstp->rq_all);
+ task = rqstp->rq_task;
+ }
+ spin_unlock_bh(&pool->sp_lock);
+
+ return task;
+}
+
+/*
+ * Create or destroy enough new threads to make the number
+ * of threads the given number. If `pool' is non-NULL, applies
+ * only to threads in that pool, otherwise round-robins between
+ * all pools. Must be called with a svc_get() reference and
+ * the BKL held.
+ *
+ * Destroying threads relies on the service threads filling in
+ * rqstp->rq_task, which only the nfs ones do. Assumes the serv
+ * has been created using svc_create_pooled().
+ *
+ * Based on code that used to be in nfsd_svc() but tweaked
+ * to be pool-aware.
+ */
+int
+svc_set_num_threads(struct svc_serv *serv, struct svc_pool *pool, int nrservs)
+{
+ struct task_struct *victim;
+ int error = 0;
+ unsigned int state = serv->sv_nrthreads-1;
+
+ if (pool == NULL) {
+ /* The -1 assumes caller has done a svc_get() */
+ nrservs -= (serv->sv_nrthreads-1);
+ } else {
+ spin_lock_bh(&pool->sp_lock);
+ nrservs -= pool->sp_nrthreads;
+ spin_unlock_bh(&pool->sp_lock);
+ }
+
+ /* create new threads */
+ while (nrservs > 0) {
+ nrservs--;
+ __module_get(serv->sv_module);
+ error = __svc_create_thread(serv->sv_function, serv,
+ choose_pool(serv, pool, &state));
+ if (error < 0) {
+ module_put(serv->sv_module);
+ break;
+ }
+ }
+ /* destroy old threads */
+ while (nrservs < 0 &&
+ (victim = choose_victim(serv, pool, &state)) != NULL) {
+ send_sig(serv->sv_kill_signal, victim, 1);
+ nrservs++;
+ }
+
+ return error;
+}
+
+/*
+ * Called from a server thread as it's exiting. Caller must hold BKL.
*/
void
svc_exit_thread(struct svc_rqst *rqstp)
{
struct svc_serv *serv = rqstp->rq_server;
+ struct svc_pool *pool = rqstp->rq_pool;
svc_release_buffer(rqstp);
kfree(rqstp->rq_resp);
kfree(rqstp->rq_argp);
kfree(rqstp->rq_auth_data);
+
+ spin_lock_bh(&pool->sp_lock);
+ pool->sp_nrthreads--;
+ list_del(&rqstp->rq_all);
+ spin_unlock_bh(&pool->sp_lock);
+
kfree(rqstp);
/* Release the server */
* Process the RPC request.
*/
int
-svc_process(struct svc_serv *serv, struct svc_rqst *rqstp)
+svc_process(struct svc_rqst *rqstp)
{
struct svc_program *progp;
struct svc_version *versp = NULL; /* compiler food */
struct svc_procedure *procp = NULL;
struct kvec * argv = &rqstp->rq_arg.head[0];
struct kvec * resv = &rqstp->rq_res.head[0];
+ struct svc_serv *serv = rqstp->rq_server;
kxdrproc_t xdr;
- u32 *statp;
- u32 dir, prog, vers, proc,
- auth_stat, rpc_stat;
+ __be32 *statp;
+ u32 dir, prog, vers, proc;
+ __be32 auth_stat, rpc_stat;
int auth_res;
- u32 *accept_statp;
+ __be32 *accept_statp;
rpc_stat = rpc_success;
rqstp->rq_res.page_base = 0;
rqstp->rq_res.page_len = 0;
rqstp->rq_res.buflen = PAGE_SIZE;
+ rqstp->rq_res.tail[0].iov_base = NULL;
rqstp->rq_res.tail[0].iov_len = 0;
+ /* Will be turned off only in gss privacy case: */
+ rqstp->rq_sendfile_ok = 1;
/* tcp needs a space for the record length... */
if (rqstp->rq_prot == IPPROTO_TCP)
- svc_putu32(resv, 0);
+ svc_putnl(resv, 0);
rqstp->rq_xid = svc_getu32(argv);
svc_putu32(resv, rqstp->rq_xid);
- dir = ntohl(svc_getu32(argv));
- vers = ntohl(svc_getu32(argv));
+ dir = svc_getnl(argv);
+ vers = svc_getnl(argv);
/* First words of reply: */
- svc_putu32(resv, xdr_one); /* REPLY */
+ svc_putnl(resv, 1); /* REPLY */
if (dir != 0) /* direction != CALL */
goto err_bad_dir;
/* Save position in case we later decide to reject: */
accept_statp = resv->iov_base + resv->iov_len;
- svc_putu32(resv, xdr_zero); /* ACCEPT */
+ svc_putnl(resv, 0); /* ACCEPT */
- rqstp->rq_prog = prog = ntohl(svc_getu32(argv)); /* program number */
- rqstp->rq_vers = vers = ntohl(svc_getu32(argv)); /* version number */
- rqstp->rq_proc = proc = ntohl(svc_getu32(argv)); /* procedure number */
+ rqstp->rq_prog = prog = svc_getnl(argv); /* program number */
+ rqstp->rq_vers = vers = svc_getnl(argv); /* version number */
+ rqstp->rq_proc = proc = svc_getnl(argv); /* procedure number */
progp = serv->sv_program;
/* Build the reply header. */
statp = resv->iov_base +resv->iov_len;
- svc_putu32(resv, rpc_success); /* RPC_SUCCESS */
+ svc_putnl(resv, RPC_SUCCESS);
/* Bump per-procedure stats counter */
procp->pc_count++;
err_bad_rpc:
serv->sv_stats->rpcbadfmt++;
- svc_putu32(resv, xdr_one); /* REJECT */
- svc_putu32(resv, xdr_zero); /* RPC_MISMATCH */
- svc_putu32(resv, xdr_two); /* Only RPCv2 supported */
- svc_putu32(resv, xdr_two);
+ svc_putnl(resv, 1); /* REJECT */
+ svc_putnl(resv, 0); /* RPC_MISMATCH */
+ svc_putnl(resv, 2); /* Only RPCv2 supported */
+ svc_putnl(resv, 2);
goto sendit;
err_bad_auth:
serv->sv_stats->rpcbadauth++;
/* Restore write pointer to location of accept status: */
xdr_ressize_check(rqstp, accept_statp);
- svc_putu32(resv, xdr_one); /* REJECT */
- svc_putu32(resv, xdr_one); /* AUTH_ERROR */
- svc_putu32(resv, auth_stat); /* status */
+ svc_putnl(resv, 1); /* REJECT */
+ svc_putnl(resv, 1); /* AUTH_ERROR */
+ svc_putnl(resv, ntohl(auth_stat)); /* status */
goto sendit;
err_bad_prog:
dprintk("svc: unknown program %d\n", prog);
serv->sv_stats->rpcbadfmt++;
- svc_putu32(resv, rpc_prog_unavail);
+ svc_putnl(resv, RPC_PROG_UNAVAIL);
goto sendit;
err_bad_vers:
printk("svc: unknown version (%d)\n", vers);
#endif
serv->sv_stats->rpcbadfmt++;
- svc_putu32(resv, rpc_prog_mismatch);
- svc_putu32(resv, htonl(progp->pg_lovers));
- svc_putu32(resv, htonl(progp->pg_hivers));
+ svc_putnl(resv, RPC_PROG_MISMATCH);
+ svc_putnl(resv, progp->pg_lovers);
+ svc_putnl(resv, progp->pg_hivers);
goto sendit;
err_bad_proc:
printk("svc: unknown procedure (%d)\n", proc);
#endif
serv->sv_stats->rpcbadfmt++;
- svc_putu32(resv, rpc_proc_unavail);
+ svc_putnl(resv, RPC_PROC_UNAVAIL);
goto sendit;
err_garbage:
rpc_stat = rpc_garbage_args;
err_bad:
serv->sv_stats->rpcbadfmt++;
- svc_putu32(resv, rpc_stat);
+ svc_putnl(resv, ntohl(rpc_stat));
goto sendit;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff