2005-04-17 06:20:36 +08:00
|
|
|
/*
|
|
|
|
* Central processing for nfsd.
|
|
|
|
*
|
|
|
|
* Authors: Olaf Kirch (okir@monad.swb.de)
|
|
|
|
*
|
|
|
|
* Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
|
|
|
|
*/
|
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|
|
Detach sched.h from mm.h
First thing mm.h does is including sched.h solely for can_do_mlock() inline
function which has "current" dereference inside. By dealing with can_do_mlock()
mm.h can be detached from sched.h which is good. See below, why.
This patch
a) removes unconditional inclusion of sched.h from mm.h
b) makes can_do_mlock() normal function in mm/mlock.c
c) exports can_do_mlock() to not break compilation
d) adds sched.h inclusions back to files that were getting it indirectly.
e) adds less bloated headers to some files (asm/signal.h, jiffies.h) that were
getting them indirectly
Net result is:
a) mm.h users would get less code to open, read, preprocess, parse, ... if
they don't need sched.h
b) sched.h stops being dependency for significant number of files:
on x86_64 allmodconfig touching sched.h results in recompile of 4083 files,
after patch it's only 3744 (-8.3%).
Cross-compile tested on
all arm defconfigs, all mips defconfigs, all powerpc defconfigs,
alpha alpha-up
arm
i386 i386-up i386-defconfig i386-allnoconfig
ia64 ia64-up
m68k
mips
parisc parisc-up
powerpc powerpc-up
s390 s390-up
sparc sparc-up
sparc64 sparc64-up
um-x86_64
x86_64 x86_64-up x86_64-defconfig x86_64-allnoconfig
as well as my two usual configs.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-21 05:22:52 +08:00
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|
|
#include <linux/sched.h>
|
2007-07-17 19:03:35 +08:00
|
|
|
#include <linux/freezer.h>
|
2011-07-02 02:23:34 +08:00
|
|
|
#include <linux/module.h>
|
2005-04-17 06:20:36 +08:00
|
|
|
#include <linux/fs_struct.h>
|
2009-04-03 13:28:18 +08:00
|
|
|
#include <linux/swap.h>
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
#include <linux/sunrpc/stats.h>
|
|
|
|
#include <linux/sunrpc/svcsock.h>
|
2015-12-12 05:45:59 +08:00
|
|
|
#include <linux/sunrpc/svc_xprt.h>
|
2005-04-17 06:20:36 +08:00
|
|
|
#include <linux/lockd/bind.h>
|
2005-06-23 01:16:26 +08:00
|
|
|
#include <linux/nfsacl.h>
|
2009-08-15 23:54:41 +08:00
|
|
|
#include <linux/seq_file.h>
|
2015-12-12 05:45:59 +08:00
|
|
|
#include <linux/inetdevice.h>
|
|
|
|
#include <net/addrconf.h>
|
|
|
|
#include <net/ipv6.h>
|
2010-09-29 20:03:50 +08:00
|
|
|
#include <net/net_namespace.h>
|
2009-12-04 02:30:56 +08:00
|
|
|
#include "nfsd.h"
|
|
|
|
#include "cache.h"
|
2009-11-05 07:12:35 +08:00
|
|
|
#include "vfs.h"
|
2012-12-06 19:23:14 +08:00
|
|
|
#include "netns.h"
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
#define NFSDDBG_FACILITY NFSDDBG_SVC
|
|
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|
|
|
extern struct svc_program nfsd_program;
|
2008-06-10 20:40:38 +08:00
|
|
|
static int nfsd(void *vrqstp);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-06-10 20:40:35 +08:00
|
|
|
/*
|
2012-12-06 19:23:24 +08:00
|
|
|
* nfsd_mutex protects nn->nfsd_serv -- both the pointer itself and the members
|
2008-06-10 20:40:35 +08:00
|
|
|
* of the svc_serv struct. In particular, ->sv_nrthreads but also to some
|
|
|
|
* extent ->sv_temp_socks and ->sv_permsocks. It also protects nfsdstats.th_cnt
|
|
|
|
*
|
2012-12-06 19:23:24 +08:00
|
|
|
* If (out side the lock) nn->nfsd_serv is non-NULL, then it must point to a
|
2008-06-10 20:40:35 +08:00
|
|
|
* properly initialised 'struct svc_serv' with ->sv_nrthreads > 0. That number
|
|
|
|
* of nfsd threads must exist and each must listed in ->sp_all_threads in each
|
|
|
|
* entry of ->sv_pools[].
|
|
|
|
*
|
|
|
|
* Transitions of the thread count between zero and non-zero are of particular
|
|
|
|
* interest since the svc_serv needs to be created and initialized at that
|
|
|
|
* point, or freed.
|
2008-06-10 20:40:36 +08:00
|
|
|
*
|
|
|
|
* Finally, the nfsd_mutex also protects some of the global variables that are
|
|
|
|
* accessed when nfsd starts and that are settable via the write_* routines in
|
|
|
|
* nfsctl.c. In particular:
|
|
|
|
*
|
|
|
|
* user_recovery_dirname
|
|
|
|
* user_lease_time
|
|
|
|
* nfsd_versions
|
2008-06-10 20:40:35 +08:00
|
|
|
*/
|
|
|
|
DEFINE_MUTEX(nfsd_mutex);
|
|
|
|
|
2009-06-25 03:37:45 +08:00
|
|
|
/*
|
|
|
|
* nfsd_drc_lock protects nfsd_drc_max_pages and nfsd_drc_pages_used.
|
|
|
|
* nfsd_drc_max_pages limits the total amount of memory available for
|
|
|
|
* version 4.1 DRC caches.
|
|
|
|
* nfsd_drc_pages_used tracks the current version 4.1 DRC memory usage.
|
|
|
|
*/
|
|
|
|
spinlock_t nfsd_drc_lock;
|
2013-02-23 08:35:47 +08:00
|
|
|
unsigned long nfsd_drc_max_mem;
|
|
|
|
unsigned long nfsd_drc_mem_used;
|
2009-06-25 03:37:45 +08:00
|
|
|
|
2006-02-01 19:04:34 +08:00
|
|
|
#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
|
|
|
|
static struct svc_stat nfsd_acl_svcstats;
|
|
|
|
static struct svc_version * nfsd_acl_version[] = {
|
|
|
|
[2] = &nfsd_acl_version2,
|
|
|
|
[3] = &nfsd_acl_version3,
|
|
|
|
};
|
|
|
|
|
|
|
|
#define NFSD_ACL_MINVERS 2
|
2006-03-24 19:15:34 +08:00
|
|
|
#define NFSD_ACL_NRVERS ARRAY_SIZE(nfsd_acl_version)
|
2006-02-01 19:04:34 +08:00
|
|
|
static struct svc_version *nfsd_acl_versions[NFSD_ACL_NRVERS];
|
|
|
|
|
|
|
|
static struct svc_program nfsd_acl_program = {
|
|
|
|
.pg_prog = NFS_ACL_PROGRAM,
|
|
|
|
.pg_nvers = NFSD_ACL_NRVERS,
|
|
|
|
.pg_vers = nfsd_acl_versions,
|
2007-01-26 16:56:58 +08:00
|
|
|
.pg_name = "nfsacl",
|
2006-02-01 19:04:34 +08:00
|
|
|
.pg_class = "nfsd",
|
|
|
|
.pg_stats = &nfsd_acl_svcstats,
|
|
|
|
.pg_authenticate = &svc_set_client,
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct svc_stat nfsd_acl_svcstats = {
|
|
|
|
.program = &nfsd_acl_program,
|
|
|
|
};
|
|
|
|
#endif /* defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) */
|
|
|
|
|
2005-11-07 17:00:25 +08:00
|
|
|
static struct svc_version * nfsd_version[] = {
|
|
|
|
[2] = &nfsd_version2,
|
|
|
|
#if defined(CONFIG_NFSD_V3)
|
|
|
|
[3] = &nfsd_version3,
|
|
|
|
#endif
|
|
|
|
#if defined(CONFIG_NFSD_V4)
|
|
|
|
[4] = &nfsd_version4,
|
|
|
|
#endif
|
|
|
|
};
|
|
|
|
|
|
|
|
#define NFSD_MINVERS 2
|
2006-03-24 19:15:34 +08:00
|
|
|
#define NFSD_NRVERS ARRAY_SIZE(nfsd_version)
|
2005-11-07 17:00:25 +08:00
|
|
|
static struct svc_version *nfsd_versions[NFSD_NRVERS];
|
|
|
|
|
|
|
|
struct svc_program nfsd_program = {
|
2006-02-01 19:04:34 +08:00
|
|
|
#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
|
|
|
|
.pg_next = &nfsd_acl_program,
|
|
|
|
#endif
|
2005-11-07 17:00:25 +08:00
|
|
|
.pg_prog = NFS_PROGRAM, /* program number */
|
|
|
|
.pg_nvers = NFSD_NRVERS, /* nr of entries in nfsd_version */
|
|
|
|
.pg_vers = nfsd_versions, /* version table */
|
|
|
|
.pg_name = "nfsd", /* program name */
|
|
|
|
.pg_class = "nfsd", /* authentication class */
|
|
|
|
.pg_stats = &nfsd_svcstats, /* version table */
|
|
|
|
.pg_authenticate = &svc_set_client, /* export authentication */
|
|
|
|
|
|
|
|
};
|
|
|
|
|
2013-07-09 07:51:44 +08:00
|
|
|
static bool nfsd_supported_minorversions[NFSD_SUPPORTED_MINOR_VERSION + 1] = {
|
|
|
|
[0] = 1,
|
|
|
|
[1] = 1,
|
2015-01-13 03:52:15 +08:00
|
|
|
[2] = 1,
|
2013-07-09 07:51:44 +08:00
|
|
|
};
|
2009-04-03 13:28:59 +08:00
|
|
|
|
2006-10-02 17:17:46 +08:00
|
|
|
int nfsd_vers(int vers, enum vers_op change)
|
|
|
|
{
|
|
|
|
if (vers < NFSD_MINVERS || vers >= NFSD_NRVERS)
|
2010-05-14 19:33:36 +08:00
|
|
|
return 0;
|
2006-10-02 17:17:46 +08:00
|
|
|
switch(change) {
|
|
|
|
case NFSD_SET:
|
|
|
|
nfsd_versions[vers] = nfsd_version[vers];
|
|
|
|
#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
|
|
|
|
if (vers < NFSD_ACL_NRVERS)
|
2007-01-26 16:56:58 +08:00
|
|
|
nfsd_acl_versions[vers] = nfsd_acl_version[vers];
|
2006-10-02 17:17:46 +08:00
|
|
|
#endif
|
2007-01-26 16:56:58 +08:00
|
|
|
break;
|
2006-10-02 17:17:46 +08:00
|
|
|
case NFSD_CLEAR:
|
|
|
|
nfsd_versions[vers] = NULL;
|
|
|
|
#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
|
|
|
|
if (vers < NFSD_ACL_NRVERS)
|
2007-01-26 16:56:58 +08:00
|
|
|
nfsd_acl_versions[vers] = NULL;
|
2006-10-02 17:17:46 +08:00
|
|
|
#endif
|
|
|
|
break;
|
|
|
|
case NFSD_TEST:
|
|
|
|
return nfsd_versions[vers] != NULL;
|
|
|
|
case NFSD_AVAIL:
|
|
|
|
return nfsd_version[vers] != NULL;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
2009-04-03 13:28:59 +08:00
|
|
|
|
|
|
|
int nfsd_minorversion(u32 minorversion, enum vers_op change)
|
|
|
|
{
|
|
|
|
if (minorversion > NFSD_SUPPORTED_MINOR_VERSION)
|
|
|
|
return -1;
|
|
|
|
switch(change) {
|
|
|
|
case NFSD_SET:
|
2013-07-09 07:51:44 +08:00
|
|
|
nfsd_supported_minorversions[minorversion] = true;
|
2009-04-03 13:28:59 +08:00
|
|
|
break;
|
|
|
|
case NFSD_CLEAR:
|
2013-07-09 07:51:44 +08:00
|
|
|
nfsd_supported_minorversions[minorversion] = false;
|
2009-04-03 13:28:59 +08:00
|
|
|
break;
|
|
|
|
case NFSD_TEST:
|
2013-07-09 07:51:44 +08:00
|
|
|
return nfsd_supported_minorversions[minorversion];
|
2009-04-03 13:28:59 +08:00
|
|
|
case NFSD_AVAIL:
|
|
|
|
return minorversion <= NFSD_SUPPORTED_MINOR_VERSION;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/*
|
|
|
|
* Maximum number of nfsd processes
|
|
|
|
*/
|
|
|
|
#define NFSD_MAXSERVS 8192
|
|
|
|
|
2012-12-06 19:23:24 +08:00
|
|
|
int nfsd_nrthreads(struct net *net)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-06-12 11:38:42 +08:00
|
|
|
int rv = 0;
|
2012-12-06 19:23:24 +08:00
|
|
|
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
|
|
|
|
|
2008-06-12 11:38:42 +08:00
|
|
|
mutex_lock(&nfsd_mutex);
|
2012-12-06 19:23:24 +08:00
|
|
|
if (nn->nfsd_serv)
|
|
|
|
rv = nn->nfsd_serv->sv_nrthreads;
|
2008-06-12 11:38:42 +08:00
|
|
|
mutex_unlock(&nfsd_mutex);
|
|
|
|
return rv;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2012-12-10 17:19:09 +08:00
|
|
|
static int nfsd_init_socks(struct net *net)
|
2010-07-22 06:29:25 +08:00
|
|
|
{
|
|
|
|
int error;
|
2012-12-06 19:23:24 +08:00
|
|
|
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
|
|
|
|
|
|
|
|
if (!list_empty(&nn->nfsd_serv->sv_permsocks))
|
2010-07-22 06:29:25 +08:00
|
|
|
return 0;
|
|
|
|
|
2012-12-06 19:23:24 +08:00
|
|
|
error = svc_create_xprt(nn->nfsd_serv, "udp", net, PF_INET, NFS_PORT,
|
2010-07-22 06:29:25 +08:00
|
|
|
SVC_SOCK_DEFAULTS);
|
|
|
|
if (error < 0)
|
|
|
|
return error;
|
|
|
|
|
2012-12-06 19:23:24 +08:00
|
|
|
error = svc_create_xprt(nn->nfsd_serv, "tcp", net, PF_INET, NFS_PORT,
|
2010-07-22 06:29:25 +08:00
|
|
|
SVC_SOCK_DEFAULTS);
|
|
|
|
if (error < 0)
|
|
|
|
return error;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2012-12-06 19:23:39 +08:00
|
|
|
static int nfsd_users = 0;
|
2010-07-20 04:50:04 +08:00
|
|
|
|
2012-12-06 19:23:29 +08:00
|
|
|
static int nfsd_startup_generic(int nrservs)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
2012-12-06 19:23:39 +08:00
|
|
|
if (nfsd_users++)
|
2012-12-06 19:23:29 +08:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Readahead param cache - will no-op if it already exists.
|
|
|
|
* (Note therefore results will be suboptimal if number of
|
|
|
|
* threads is modified after nfsd start.)
|
|
|
|
*/
|
|
|
|
ret = nfsd_racache_init(2*nrservs);
|
|
|
|
if (ret)
|
2014-07-30 21:26:05 +08:00
|
|
|
goto dec_users;
|
|
|
|
|
2012-12-06 19:23:29 +08:00
|
|
|
ret = nfs4_state_start();
|
|
|
|
if (ret)
|
|
|
|
goto out_racache;
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
out_racache:
|
|
|
|
nfsd_racache_shutdown();
|
2014-07-30 21:26:05 +08:00
|
|
|
dec_users:
|
|
|
|
nfsd_users--;
|
2012-12-06 19:23:29 +08:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void nfsd_shutdown_generic(void)
|
|
|
|
{
|
2012-12-06 19:23:39 +08:00
|
|
|
if (--nfsd_users)
|
|
|
|
return;
|
|
|
|
|
2012-12-06 19:23:29 +08:00
|
|
|
nfs4_state_shutdown();
|
|
|
|
nfsd_racache_shutdown();
|
|
|
|
}
|
|
|
|
|
2013-12-31 13:17:30 +08:00
|
|
|
static bool nfsd_needs_lockd(void)
|
|
|
|
{
|
2014-01-06 11:28:41 +08:00
|
|
|
#if defined(CONFIG_NFSD_V3)
|
2013-12-31 13:17:30 +08:00
|
|
|
return (nfsd_versions[2] != NULL) || (nfsd_versions[3] != NULL);
|
2014-01-06 11:28:41 +08:00
|
|
|
#else
|
|
|
|
return (nfsd_versions[2] != NULL);
|
|
|
|
#endif
|
2013-12-31 13:17:30 +08:00
|
|
|
}
|
|
|
|
|
2012-12-06 19:23:34 +08:00
|
|
|
static int nfsd_startup_net(int nrservs, struct net *net)
|
2012-12-06 19:23:09 +08:00
|
|
|
{
|
2012-12-06 19:23:14 +08:00
|
|
|
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
|
2012-12-06 19:23:09 +08:00
|
|
|
int ret;
|
|
|
|
|
2012-12-06 19:23:14 +08:00
|
|
|
if (nn->nfsd_net_up)
|
|
|
|
return 0;
|
|
|
|
|
2012-12-06 19:23:34 +08:00
|
|
|
ret = nfsd_startup_generic(nrservs);
|
2012-12-06 19:23:09 +08:00
|
|
|
if (ret)
|
|
|
|
return ret;
|
2012-12-06 19:23:34 +08:00
|
|
|
ret = nfsd_init_socks(net);
|
|
|
|
if (ret)
|
|
|
|
goto out_socks;
|
2013-12-31 13:17:30 +08:00
|
|
|
|
|
|
|
if (nfsd_needs_lockd() && !nn->lockd_up) {
|
|
|
|
ret = lockd_up(net);
|
|
|
|
if (ret)
|
|
|
|
goto out_socks;
|
|
|
|
nn->lockd_up = 1;
|
|
|
|
}
|
|
|
|
|
2012-12-06 19:23:09 +08:00
|
|
|
ret = nfs4_state_start_net(net);
|
|
|
|
if (ret)
|
|
|
|
goto out_lockd;
|
|
|
|
|
2012-12-06 19:23:14 +08:00
|
|
|
nn->nfsd_net_up = true;
|
2012-12-06 19:23:09 +08:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
out_lockd:
|
2013-12-31 13:17:30 +08:00
|
|
|
if (nn->lockd_up) {
|
|
|
|
lockd_down(net);
|
|
|
|
nn->lockd_up = 0;
|
|
|
|
}
|
2012-12-06 19:23:34 +08:00
|
|
|
out_socks:
|
2012-12-06 19:23:29 +08:00
|
|
|
nfsd_shutdown_generic();
|
2010-07-20 04:50:04 +08:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2012-12-06 19:23:09 +08:00
|
|
|
static void nfsd_shutdown_net(struct net *net)
|
|
|
|
{
|
2012-12-06 19:23:14 +08:00
|
|
|
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
|
|
|
|
|
2012-12-06 19:23:09 +08:00
|
|
|
nfs4_state_shutdown_net(net);
|
2013-12-31 13:17:30 +08:00
|
|
|
if (nn->lockd_up) {
|
|
|
|
lockd_down(net);
|
|
|
|
nn->lockd_up = 0;
|
|
|
|
}
|
2012-12-06 19:23:14 +08:00
|
|
|
nn->nfsd_net_up = false;
|
2012-12-06 19:23:34 +08:00
|
|
|
nfsd_shutdown_generic();
|
2012-12-06 19:23:09 +08:00
|
|
|
}
|
|
|
|
|
2015-12-12 05:45:59 +08:00
|
|
|
static int nfsd_inetaddr_event(struct notifier_block *this, unsigned long event,
|
|
|
|
void *ptr)
|
|
|
|
{
|
|
|
|
struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
|
|
|
|
struct net_device *dev = ifa->ifa_dev->dev;
|
|
|
|
struct net *net = dev_net(dev);
|
|
|
|
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
|
|
|
|
struct sockaddr_in sin;
|
|
|
|
|
|
|
|
if (event != NETDEV_DOWN)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
if (nn->nfsd_serv) {
|
|
|
|
dprintk("nfsd_inetaddr_event: removed %pI4\n", &ifa->ifa_local);
|
|
|
|
sin.sin_family = AF_INET;
|
|
|
|
sin.sin_addr.s_addr = ifa->ifa_local;
|
|
|
|
svc_age_temp_xprts_now(nn->nfsd_serv, (struct sockaddr *)&sin);
|
|
|
|
}
|
|
|
|
|
|
|
|
out:
|
|
|
|
return NOTIFY_DONE;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct notifier_block nfsd_inetaddr_notifier = {
|
|
|
|
.notifier_call = nfsd_inetaddr_event,
|
|
|
|
};
|
|
|
|
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
|
|
static int nfsd_inet6addr_event(struct notifier_block *this,
|
|
|
|
unsigned long event, void *ptr)
|
|
|
|
{
|
|
|
|
struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
|
|
|
|
struct net_device *dev = ifa->idev->dev;
|
|
|
|
struct net *net = dev_net(dev);
|
|
|
|
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
|
|
|
|
struct sockaddr_in6 sin6;
|
|
|
|
|
|
|
|
if (event != NETDEV_DOWN)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
if (nn->nfsd_serv) {
|
|
|
|
dprintk("nfsd_inet6addr_event: removed %pI6\n", &ifa->addr);
|
|
|
|
sin6.sin6_family = AF_INET6;
|
|
|
|
sin6.sin6_addr = ifa->addr;
|
|
|
|
svc_age_temp_xprts_now(nn->nfsd_serv, (struct sockaddr *)&sin6);
|
|
|
|
}
|
|
|
|
|
|
|
|
out:
|
|
|
|
return NOTIFY_DONE;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct notifier_block nfsd_inet6addr_notifier = {
|
|
|
|
.notifier_call = nfsd_inet6addr_event,
|
|
|
|
};
|
|
|
|
#endif
|
|
|
|
|
2012-12-06 19:23:44 +08:00
|
|
|
static void nfsd_last_thread(struct svc_serv *serv, struct net *net)
|
2010-07-20 04:50:04 +08:00
|
|
|
{
|
2012-12-06 19:23:34 +08:00
|
|
|
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
|
|
|
|
|
2015-12-12 05:45:59 +08:00
|
|
|
unregister_inetaddr_notifier(&nfsd_inetaddr_notifier);
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
|
|
unregister_inet6addr_notifier(&nfsd_inet6addr_notifier);
|
|
|
|
#endif
|
2010-07-20 04:50:04 +08:00
|
|
|
/*
|
|
|
|
* write_ports can create the server without actually starting
|
|
|
|
* any threads--if we get shut down before any threads are
|
|
|
|
* started, then nfsd_last_thread will be run before any of this
|
|
|
|
* other initialization has been done.
|
|
|
|
*/
|
2012-12-06 19:23:34 +08:00
|
|
|
if (!nn->nfsd_net_up)
|
2010-07-20 04:50:04 +08:00
|
|
|
return;
|
2012-12-06 19:23:09 +08:00
|
|
|
nfsd_shutdown_net(net);
|
2006-10-02 17:17:44 +08:00
|
|
|
|
2012-01-13 18:03:04 +08:00
|
|
|
svc_rpcb_cleanup(serv, net);
|
2011-10-25 19:17:28 +08:00
|
|
|
|
2008-06-10 20:40:37 +08:00
|
|
|
printk(KERN_WARNING "nfsd: last server has exited, flushing export "
|
|
|
|
"cache\n");
|
2012-04-11 19:13:21 +08:00
|
|
|
nfsd_export_flush(net);
|
2006-10-02 17:17:44 +08:00
|
|
|
}
|
2006-10-02 17:17:46 +08:00
|
|
|
|
|
|
|
void nfsd_reset_versions(void)
|
|
|
|
{
|
|
|
|
int found_one = 0;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = NFSD_MINVERS; i < NFSD_NRVERS; i++) {
|
|
|
|
if (nfsd_program.pg_vers[i])
|
|
|
|
found_one = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!found_one) {
|
|
|
|
for (i = NFSD_MINVERS; i < NFSD_NRVERS; i++)
|
|
|
|
nfsd_program.pg_vers[i] = nfsd_version[i];
|
|
|
|
#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
|
|
|
|
for (i = NFSD_ACL_MINVERS; i < NFSD_ACL_NRVERS; i++)
|
|
|
|
nfsd_acl_program.pg_vers[i] =
|
|
|
|
nfsd_acl_version[i];
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2009-04-03 13:28:18 +08:00
|
|
|
/*
|
|
|
|
* Each session guarantees a negotiated per slot memory cache for replies
|
|
|
|
* which in turn consumes memory beyond the v2/v3/v4.0 server. A dedicated
|
|
|
|
* NFSv4.1 server might want to use more memory for a DRC than a machine
|
|
|
|
* with mutiple services.
|
|
|
|
*
|
|
|
|
* Impose a hard limit on the number of pages for the DRC which varies
|
|
|
|
* according to the machines free pages. This is of course only a default.
|
|
|
|
*
|
|
|
|
* For now this is a #defined shift which could be under admin control
|
|
|
|
* in the future.
|
|
|
|
*/
|
|
|
|
static void set_max_drc(void)
|
|
|
|
{
|
2009-07-28 07:06:45 +08:00
|
|
|
#define NFSD_DRC_SIZE_SHIFT 10
|
2009-07-28 07:09:19 +08:00
|
|
|
nfsd_drc_max_mem = (nr_free_buffer_pages()
|
|
|
|
>> NFSD_DRC_SIZE_SHIFT) * PAGE_SIZE;
|
|
|
|
nfsd_drc_mem_used = 0;
|
2009-06-25 03:37:45 +08:00
|
|
|
spin_lock_init(&nfsd_drc_lock);
|
2013-02-23 08:35:47 +08:00
|
|
|
dprintk("%s nfsd_drc_max_mem %lu \n", __func__, nfsd_drc_max_mem);
|
2009-04-03 13:28:18 +08:00
|
|
|
}
|
2008-06-10 20:40:35 +08:00
|
|
|
|
2012-01-31 05:18:35 +08:00
|
|
|
static int nfsd_get_default_max_blksize(void)
|
2006-10-02 17:17:46 +08:00
|
|
|
{
|
2012-01-31 05:18:35 +08:00
|
|
|
struct sysinfo i;
|
|
|
|
unsigned long long target;
|
|
|
|
unsigned long ret;
|
2008-06-10 20:40:35 +08:00
|
|
|
|
2012-01-31 05:18:35 +08:00
|
|
|
si_meminfo(&i);
|
2012-01-31 05:21:11 +08:00
|
|
|
target = (i.totalram - i.totalhigh) << PAGE_SHIFT;
|
2012-01-31 05:18:35 +08:00
|
|
|
/*
|
|
|
|
* Aim for 1/4096 of memory per thread This gives 1MB on 4Gig
|
|
|
|
* machines, but only uses 32K on 128M machines. Bottom out at
|
|
|
|
* 8K on 32M and smaller. Of course, this is only a default.
|
|
|
|
*/
|
|
|
|
target >>= 12;
|
|
|
|
|
|
|
|
ret = NFSSVC_MAXBLKSIZE;
|
|
|
|
while (ret > target && ret >= 8*1024*2)
|
|
|
|
ret /= 2;
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2015-06-09 03:06:51 +08:00
|
|
|
static struct svc_serv_ops nfsd_thread_sv_ops = {
|
|
|
|
.svo_shutdown = nfsd_last_thread,
|
|
|
|
.svo_function = nfsd,
|
|
|
|
.svo_enqueue_xprt = svc_xprt_do_enqueue,
|
2015-06-09 03:08:33 +08:00
|
|
|
.svo_setup = svc_set_num_threads,
|
2015-06-09 03:06:51 +08:00
|
|
|
.svo_module = THIS_MODULE,
|
2015-06-09 03:03:32 +08:00
|
|
|
};
|
|
|
|
|
2012-12-10 17:19:20 +08:00
|
|
|
int nfsd_create_serv(struct net *net)
|
2012-01-31 05:18:35 +08:00
|
|
|
{
|
2012-05-02 20:08:38 +08:00
|
|
|
int error;
|
2012-12-06 19:23:19 +08:00
|
|
|
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
|
2012-05-02 20:08:38 +08:00
|
|
|
|
2008-06-10 20:40:35 +08:00
|
|
|
WARN_ON(!mutex_is_locked(&nfsd_mutex));
|
2012-12-06 19:23:24 +08:00
|
|
|
if (nn->nfsd_serv) {
|
|
|
|
svc_get(nn->nfsd_serv);
|
2006-10-02 17:17:46 +08:00
|
|
|
return 0;
|
|
|
|
}
|
2012-01-31 05:18:35 +08:00
|
|
|
if (nfsd_max_blksize == 0)
|
|
|
|
nfsd_max_blksize = nfsd_get_default_max_blksize();
|
2010-08-07 03:48:03 +08:00
|
|
|
nfsd_reset_versions();
|
2012-12-06 19:23:24 +08:00
|
|
|
nn->nfsd_serv = svc_create_pooled(&nfsd_program, nfsd_max_blksize,
|
2015-06-09 03:06:51 +08:00
|
|
|
&nfsd_thread_sv_ops);
|
2012-12-06 19:23:24 +08:00
|
|
|
if (nn->nfsd_serv == NULL)
|
2010-07-22 04:40:08 +08:00
|
|
|
return -ENOMEM;
|
2008-06-10 20:40:35 +08:00
|
|
|
|
2014-07-03 04:11:22 +08:00
|
|
|
nn->nfsd_serv->sv_maxconn = nn->max_connections;
|
2012-12-06 19:23:24 +08:00
|
|
|
error = svc_bind(nn->nfsd_serv, net);
|
2012-05-02 20:08:38 +08:00
|
|
|
if (error < 0) {
|
2012-12-06 19:23:24 +08:00
|
|
|
svc_destroy(nn->nfsd_serv);
|
2012-05-02 20:08:38 +08:00
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
2010-07-22 04:40:08 +08:00
|
|
|
set_max_drc();
|
2015-12-12 05:45:59 +08:00
|
|
|
register_inetaddr_notifier(&nfsd_inetaddr_notifier);
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
|
|
register_inet6addr_notifier(&nfsd_inet6addr_notifier);
|
|
|
|
#endif
|
2012-12-06 19:23:19 +08:00
|
|
|
do_gettimeofday(&nn->nfssvc_boot); /* record boot time */
|
2012-01-31 05:18:35 +08:00
|
|
|
return 0;
|
2006-10-02 17:17:46 +08:00
|
|
|
}
|
|
|
|
|
2012-12-06 19:23:24 +08:00
|
|
|
int nfsd_nrpools(struct net *net)
|
2006-10-02 17:18:02 +08:00
|
|
|
{
|
2012-12-06 19:23:24 +08:00
|
|
|
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
|
|
|
|
|
|
|
|
if (nn->nfsd_serv == NULL)
|
2006-10-02 17:18:02 +08:00
|
|
|
return 0;
|
|
|
|
else
|
2012-12-06 19:23:24 +08:00
|
|
|
return nn->nfsd_serv->sv_nrpools;
|
2006-10-02 17:18:02 +08:00
|
|
|
}
|
|
|
|
|
2012-12-06 19:23:24 +08:00
|
|
|
int nfsd_get_nrthreads(int n, int *nthreads, struct net *net)
|
2006-10-02 17:18:02 +08:00
|
|
|
{
|
|
|
|
int i = 0;
|
2012-12-06 19:23:24 +08:00
|
|
|
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
|
2006-10-02 17:18:02 +08:00
|
|
|
|
2012-12-06 19:23:24 +08:00
|
|
|
if (nn->nfsd_serv != NULL) {
|
|
|
|
for (i = 0; i < nn->nfsd_serv->sv_nrpools && i < n; i++)
|
|
|
|
nthreads[i] = nn->nfsd_serv->sv_pools[i].sp_nrthreads;
|
2006-10-02 17:18:02 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2012-12-06 19:23:24 +08:00
|
|
|
void nfsd_destroy(struct net *net)
|
|
|
|
{
|
|
|
|
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
|
|
|
|
int destroy = (nn->nfsd_serv->sv_nrthreads == 1);
|
|
|
|
|
|
|
|
if (destroy)
|
|
|
|
svc_shutdown_net(nn->nfsd_serv, net);
|
|
|
|
svc_destroy(nn->nfsd_serv);
|
|
|
|
if (destroy)
|
|
|
|
nn->nfsd_serv = NULL;
|
|
|
|
}
|
|
|
|
|
2012-12-10 17:19:30 +08:00
|
|
|
int nfsd_set_nrthreads(int n, int *nthreads, struct net *net)
|
2006-10-02 17:18:02 +08:00
|
|
|
{
|
|
|
|
int i = 0;
|
|
|
|
int tot = 0;
|
|
|
|
int err = 0;
|
2012-12-06 19:23:24 +08:00
|
|
|
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
|
2006-10-02 17:18:02 +08:00
|
|
|
|
2008-06-10 20:40:35 +08:00
|
|
|
WARN_ON(!mutex_is_locked(&nfsd_mutex));
|
|
|
|
|
2012-12-06 19:23:24 +08:00
|
|
|
if (nn->nfsd_serv == NULL || n <= 0)
|
2006-10-02 17:18:02 +08:00
|
|
|
return 0;
|
|
|
|
|
2012-12-06 19:23:24 +08:00
|
|
|
if (n > nn->nfsd_serv->sv_nrpools)
|
|
|
|
n = nn->nfsd_serv->sv_nrpools;
|
2006-10-02 17:18:02 +08:00
|
|
|
|
|
|
|
/* enforce a global maximum number of threads */
|
|
|
|
tot = 0;
|
|
|
|
for (i = 0; i < n; i++) {
|
2014-06-10 18:08:19 +08:00
|
|
|
nthreads[i] = min(nthreads[i], NFSD_MAXSERVS);
|
2006-10-02 17:18:02 +08:00
|
|
|
tot += nthreads[i];
|
|
|
|
}
|
|
|
|
if (tot > NFSD_MAXSERVS) {
|
|
|
|
/* total too large: scale down requested numbers */
|
|
|
|
for (i = 0; i < n && tot > 0; i++) {
|
|
|
|
int new = nthreads[i] * NFSD_MAXSERVS / tot;
|
|
|
|
tot -= (nthreads[i] - new);
|
|
|
|
nthreads[i] = new;
|
|
|
|
}
|
|
|
|
for (i = 0; i < n && tot > 0; i++) {
|
|
|
|
nthreads[i]--;
|
|
|
|
tot--;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* There must always be a thread in pool 0; the admin
|
|
|
|
* can't shut down NFS completely using pool_threads.
|
|
|
|
*/
|
|
|
|
if (nthreads[0] == 0)
|
|
|
|
nthreads[0] = 1;
|
|
|
|
|
|
|
|
/* apply the new numbers */
|
2012-12-06 19:23:24 +08:00
|
|
|
svc_get(nn->nfsd_serv);
|
2006-10-02 17:18:02 +08:00
|
|
|
for (i = 0; i < n; i++) {
|
2015-06-09 03:08:33 +08:00
|
|
|
err = nn->nfsd_serv->sv_ops->svo_setup(nn->nfsd_serv,
|
|
|
|
&nn->nfsd_serv->sv_pools[i], nthreads[i]);
|
2006-10-02 17:18:02 +08:00
|
|
|
if (err)
|
|
|
|
break;
|
|
|
|
}
|
2012-07-03 20:46:41 +08:00
|
|
|
nfsd_destroy(net);
|
2006-10-02 17:18:02 +08:00
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2010-07-21 02:10:22 +08:00
|
|
|
/*
|
|
|
|
* Adjust the number of threads and return the new number of threads.
|
|
|
|
* This is also the function that starts the server if necessary, if
|
|
|
|
* this is the first time nrservs is nonzero.
|
|
|
|
*/
|
2005-04-17 06:20:36 +08:00
|
|
|
int
|
2012-12-10 17:19:25 +08:00
|
|
|
nfsd_svc(int nrservs, struct net *net)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
int error;
|
2010-08-03 02:12:44 +08:00
|
|
|
bool nfsd_up_before;
|
2012-12-06 19:23:24 +08:00
|
|
|
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
|
2008-06-10 20:40:35 +08:00
|
|
|
|
|
|
|
mutex_lock(&nfsd_mutex);
|
2006-10-02 17:17:46 +08:00
|
|
|
dprintk("nfsd: creating service\n");
|
2014-06-10 18:08:19 +08:00
|
|
|
|
|
|
|
nrservs = max(nrservs, 0);
|
|
|
|
nrservs = min(nrservs, NFSD_MAXSERVS);
|
2009-06-16 09:03:20 +08:00
|
|
|
error = 0;
|
2014-06-10 18:08:19 +08:00
|
|
|
|
2012-12-06 19:23:24 +08:00
|
|
|
if (nrservs == 0 && nn->nfsd_serv == NULL)
|
2009-06-16 09:03:20 +08:00
|
|
|
goto out;
|
|
|
|
|
2012-12-10 17:19:20 +08:00
|
|
|
error = nfsd_create_serv(net);
|
2006-10-02 17:17:46 +08:00
|
|
|
if (error)
|
2010-08-03 02:12:44 +08:00
|
|
|
goto out;
|
|
|
|
|
2012-12-06 19:23:34 +08:00
|
|
|
nfsd_up_before = nn->nfsd_net_up;
|
2010-08-03 02:12:44 +08:00
|
|
|
|
2012-12-06 19:23:34 +08:00
|
|
|
error = nfsd_startup_net(nrservs, net);
|
2010-07-22 06:31:42 +08:00
|
|
|
if (error)
|
|
|
|
goto out_destroy;
|
2015-06-09 03:08:33 +08:00
|
|
|
error = nn->nfsd_serv->sv_ops->svo_setup(nn->nfsd_serv,
|
|
|
|
NULL, nrservs);
|
2010-08-03 02:12:44 +08:00
|
|
|
if (error)
|
|
|
|
goto out_shutdown;
|
2012-12-06 19:23:24 +08:00
|
|
|
/* We are holding a reference to nn->nfsd_serv which
|
2010-07-22 06:31:42 +08:00
|
|
|
* we don't want to count in the return value,
|
|
|
|
* so subtract 1
|
|
|
|
*/
|
2012-12-06 19:23:24 +08:00
|
|
|
error = nn->nfsd_serv->sv_nrthreads - 1;
|
2010-07-20 04:50:04 +08:00
|
|
|
out_shutdown:
|
2010-08-03 02:12:44 +08:00
|
|
|
if (error < 0 && !nfsd_up_before)
|
2012-12-06 19:23:44 +08:00
|
|
|
nfsd_shutdown_net(net);
|
2010-08-03 02:12:44 +08:00
|
|
|
out_destroy:
|
2012-07-03 20:46:41 +08:00
|
|
|
nfsd_destroy(net); /* Release server */
|
2010-07-20 04:50:04 +08:00
|
|
|
out:
|
2008-06-10 20:40:35 +08:00
|
|
|
mutex_unlock(&nfsd_mutex);
|
2005-04-17 06:20:36 +08:00
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This is the NFS server kernel thread
|
|
|
|
*/
|
2008-06-10 20:40:38 +08:00
|
|
|
static int
|
|
|
|
nfsd(void *vrqstp)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2008-06-10 20:40:38 +08:00
|
|
|
struct svc_rqst *rqstp = (struct svc_rqst *) vrqstp;
|
2012-12-06 23:34:42 +08:00
|
|
|
struct svc_xprt *perm_sock = list_entry(rqstp->rq_server->sv_permsocks.next, typeof(struct svc_xprt), xpt_list);
|
|
|
|
struct net *net = perm_sock->xpt_net;
|
2014-07-03 04:11:22 +08:00
|
|
|
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
|
2012-08-18 09:47:53 +08:00
|
|
|
int err;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* Lock module and set up kernel thread */
|
2008-06-10 20:40:35 +08:00
|
|
|
mutex_lock(&nfsd_mutex);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-06-10 20:40:38 +08:00
|
|
|
/* At this point, the thread shares current->fs
|
2005-04-17 06:20:36 +08:00
|
|
|
* with the init process. We need to create files with a
|
|
|
|
* umask of 0 instead of init's umask. */
|
2009-03-30 07:00:13 +08:00
|
|
|
if (unshare_fs_struct() < 0) {
|
2005-04-17 06:20:36 +08:00
|
|
|
printk("Unable to start nfsd thread: out of memory\n");
|
|
|
|
goto out;
|
|
|
|
}
|
2009-03-30 07:00:13 +08:00
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
current->fs->umask = 0;
|
|
|
|
|
2008-06-10 20:40:38 +08:00
|
|
|
/*
|
|
|
|
* thread is spawned with all signals set to SIG_IGN, re-enable
|
2008-07-01 02:09:46 +08:00
|
|
|
* the ones that will bring down the thread
|
2008-06-10 20:40:38 +08:00
|
|
|
*/
|
2008-07-01 02:09:46 +08:00
|
|
|
allow_signal(SIGKILL);
|
|
|
|
allow_signal(SIGHUP);
|
|
|
|
allow_signal(SIGINT);
|
|
|
|
allow_signal(SIGQUIT);
|
2008-06-10 20:40:35 +08:00
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
nfsdstats.th_cnt++;
|
2008-06-10 20:40:35 +08:00
|
|
|
mutex_unlock(&nfsd_mutex);
|
|
|
|
|
2007-07-17 19:03:35 +08:00
|
|
|
set_freezable();
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/*
|
|
|
|
* The main request loop
|
|
|
|
*/
|
|
|
|
for (;;) {
|
2014-07-03 04:11:22 +08:00
|
|
|
/* Update sv_maxconn if it has changed */
|
|
|
|
rqstp->rq_server->sv_maxconn = nn->max_connections;
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/*
|
|
|
|
* Find a socket with data available and call its
|
|
|
|
* recvfrom routine.
|
|
|
|
*/
|
2006-10-02 17:17:50 +08:00
|
|
|
while ((err = svc_recv(rqstp, 60*60*HZ)) == -EAGAIN)
|
2005-04-17 06:20:36 +08:00
|
|
|
;
|
2008-06-10 20:40:38 +08:00
|
|
|
if (err == -EINTR)
|
2005-04-17 06:20:36 +08:00
|
|
|
break;
|
2009-09-02 16:13:40 +08:00
|
|
|
validate_process_creds();
|
2006-10-02 17:17:50 +08:00
|
|
|
svc_process(rqstp);
|
2009-09-02 16:13:40 +08:00
|
|
|
validate_process_creds();
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2006-10-02 17:17:45 +08:00
|
|
|
/* Clear signals before calling svc_exit_thread() */
|
2005-04-17 06:26:37 +08:00
|
|
|
flush_signals(current);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-06-10 20:40:35 +08:00
|
|
|
mutex_lock(&nfsd_mutex);
|
2005-04-17 06:20:36 +08:00
|
|
|
nfsdstats.th_cnt --;
|
|
|
|
|
|
|
|
out:
|
2012-07-03 20:46:41 +08:00
|
|
|
rqstp->rq_server = NULL;
|
2012-05-04 16:49:41 +08:00
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/* Release the thread */
|
|
|
|
svc_exit_thread(rqstp);
|
|
|
|
|
2012-12-06 23:34:42 +08:00
|
|
|
nfsd_destroy(net);
|
2012-07-03 20:46:41 +08:00
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/* Release module */
|
2008-06-10 20:40:35 +08:00
|
|
|
mutex_unlock(&nfsd_mutex);
|
2005-04-17 06:20:36 +08:00
|
|
|
module_put_and_exit(0);
|
2008-06-10 20:40:38 +08:00
|
|
|
return 0;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2007-07-17 19:04:48 +08:00
|
|
|
static __be32 map_new_errors(u32 vers, __be32 nfserr)
|
|
|
|
{
|
|
|
|
if (nfserr == nfserr_jukebox && vers == 2)
|
|
|
|
return nfserr_dropit;
|
|
|
|
if (nfserr == nfserr_wrongsec && vers < 4)
|
|
|
|
return nfserr_acces;
|
|
|
|
return nfserr;
|
|
|
|
}
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
int
|
2006-10-20 14:29:02 +08:00
|
|
|
nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
struct svc_procedure *proc;
|
|
|
|
kxdrproc_t xdr;
|
2006-10-20 14:28:55 +08:00
|
|
|
__be32 nfserr;
|
|
|
|
__be32 *nfserrp;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
dprintk("nfsd_dispatch: vers %d proc %d\n",
|
|
|
|
rqstp->rq_vers, rqstp->rq_proc);
|
|
|
|
proc = rqstp->rq_procinfo;
|
|
|
|
|
2011-01-25 01:11:02 +08:00
|
|
|
/*
|
|
|
|
* Give the xdr decoder a chance to change this if it wants
|
|
|
|
* (necessary in the NFSv4.0 compound case)
|
|
|
|
*/
|
|
|
|
rqstp->rq_cachetype = proc->pc_cachetype;
|
|
|
|
/* Decode arguments */
|
|
|
|
xdr = proc->pc_decode;
|
|
|
|
if (xdr && !xdr(rqstp, (__be32*)rqstp->rq_arg.head[0].iov_base,
|
|
|
|
rqstp->rq_argp)) {
|
|
|
|
dprintk("nfsd: failed to decode arguments!\n");
|
|
|
|
*statp = rpc_garbage_args;
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/* Check whether we have this call in the cache. */
|
2011-01-25 01:11:02 +08:00
|
|
|
switch (nfsd_cache_lookup(rqstp)) {
|
2005-04-17 06:20:36 +08:00
|
|
|
case RC_DROPIT:
|
|
|
|
return 0;
|
|
|
|
case RC_REPLY:
|
|
|
|
return 1;
|
|
|
|
case RC_DOIT:;
|
|
|
|
/* do it */
|
|
|
|
}
|
|
|
|
|
|
|
|
/* need to grab the location to store the status, as
|
|
|
|
* nfsv4 does some encoding while processing
|
|
|
|
*/
|
|
|
|
nfserrp = rqstp->rq_res.head[0].iov_base
|
|
|
|
+ rqstp->rq_res.head[0].iov_len;
|
2006-10-20 14:28:55 +08:00
|
|
|
rqstp->rq_res.head[0].iov_len += sizeof(__be32);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/* Now call the procedure handler, and encode NFS status. */
|
|
|
|
nfserr = proc->pc_func(rqstp, rqstp->rq_argp, rqstp->rq_resp);
|
2007-07-17 19:04:48 +08:00
|
|
|
nfserr = map_new_errors(rqstp->rq_vers, nfserr);
|
2014-11-19 20:51:17 +08:00
|
|
|
if (nfserr == nfserr_dropit || test_bit(RQ_DROPME, &rqstp->rq_flags)) {
|
2007-06-23 05:26:32 +08:00
|
|
|
dprintk("nfsd: Dropping request; may be revisited later\n");
|
2005-04-17 06:20:36 +08:00
|
|
|
nfsd_cache_update(rqstp, RC_NOCACHE, NULL);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (rqstp->rq_proc != 0)
|
|
|
|
*nfserrp++ = nfserr;
|
|
|
|
|
|
|
|
/* Encode result.
|
|
|
|
* For NFSv2, additional info is never returned in case of an error.
|
|
|
|
*/
|
|
|
|
if (!(nfserr && rqstp->rq_vers == 2)) {
|
|
|
|
xdr = proc->pc_encode;
|
|
|
|
if (xdr && !xdr(rqstp, nfserrp,
|
|
|
|
rqstp->rq_resp)) {
|
|
|
|
/* Failed to encode result. Release cache entry */
|
|
|
|
dprintk("nfsd: failed to encode result!\n");
|
|
|
|
nfsd_cache_update(rqstp, RC_NOCACHE, NULL);
|
|
|
|
*statp = rpc_system_err;
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Store reply in cache. */
|
2012-11-17 04:22:43 +08:00
|
|
|
nfsd_cache_update(rqstp, rqstp->rq_cachetype, statp + 1);
|
2005-04-17 06:20:36 +08:00
|
|
|
return 1;
|
|
|
|
}
|
2009-01-13 18:26:36 +08:00
|
|
|
|
|
|
|
int nfsd_pool_stats_open(struct inode *inode, struct file *file)
|
|
|
|
{
|
2009-08-15 23:54:41 +08:00
|
|
|
int ret;
|
2013-02-01 20:56:12 +08:00
|
|
|
struct nfsd_net *nn = net_generic(inode->i_sb->s_fs_info, nfsd_net_id);
|
2012-12-06 19:23:24 +08:00
|
|
|
|
2009-08-15 23:54:41 +08:00
|
|
|
mutex_lock(&nfsd_mutex);
|
2012-12-06 19:23:24 +08:00
|
|
|
if (nn->nfsd_serv == NULL) {
|
2009-08-15 23:54:41 +08:00
|
|
|
mutex_unlock(&nfsd_mutex);
|
2009-01-13 18:26:36 +08:00
|
|
|
return -ENODEV;
|
2009-08-15 23:54:41 +08:00
|
|
|
}
|
|
|
|
/* bump up the psudo refcount while traversing */
|
2012-12-06 19:23:24 +08:00
|
|
|
svc_get(nn->nfsd_serv);
|
|
|
|
ret = svc_pool_stats_open(nn->nfsd_serv, file);
|
2009-08-15 23:54:41 +08:00
|
|
|
mutex_unlock(&nfsd_mutex);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
int nfsd_pool_stats_release(struct inode *inode, struct file *file)
|
|
|
|
{
|
|
|
|
int ret = seq_release(inode, file);
|
2013-02-01 20:56:12 +08:00
|
|
|
struct net *net = inode->i_sb->s_fs_info;
|
2012-05-04 16:49:41 +08:00
|
|
|
|
2009-08-15 23:54:41 +08:00
|
|
|
mutex_lock(&nfsd_mutex);
|
|
|
|
/* this function really, really should have been called svc_put() */
|
2012-07-03 20:46:41 +08:00
|
|
|
nfsd_destroy(net);
|
2009-08-15 23:54:41 +08:00
|
|
|
mutex_unlock(&nfsd_mutex);
|
|
|
|
return ret;
|
2009-01-13 18:26:36 +08:00
|
|
|
}
|