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Merge branch 'for-2.6.30' of git://linux-nfs.org/~bfields/linux

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* 'for-2.6.30' of git://linux-nfs.org/~bfields/linux: (81 commits)
  nfsd41: define nfsd4_set_statp as noop for !CONFIG_NFSD_V4
  nfsd41: define NFSD_DRC_SIZE_SHIFT in set_max_drc
  nfsd41: Documentation/filesystems/nfs41-server.txt
  nfsd41: CREATE_EXCLUSIVE4_1
  nfsd41: SUPPATTR_EXCLCREAT attribute
  nfsd41: support for 3-word long attribute bitmask
  nfsd: dynamically skip encoded fattr bitmap in _nfsd4_verify
  nfsd41: pass writable attrs mask to nfsd4_decode_fattr
  nfsd41: provide support for minor version 1 at rpc level
  nfsd41: control nfsv4.1 svc via /proc/fs/nfsd/versions
  nfsd41: add OPEN4_SHARE_ACCESS_WANT nfs4_stateid bmap
  nfsd41: access_valid
  nfsd41: clientid handling
  nfsd41: check encode size for sessions maxresponse cached
  nfsd41: stateid handling
  nfsd: pass nfsd4_compound_state* to nfs4_preprocess_{state,seq}id_op
  nfsd41: destroy_session operation
  nfsd41: non-page DRC for solo sequence responses
  nfsd41: Add a create session replay cache
  nfsd41: create_session operation
  ...
This commit is contained in:
Linus Torvalds
2009-04-06 13:25:56 -07:00
parent b24241a092 04826f43d4
commit a63856252d
29 changed files with 2994 additions and 552 deletions
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88
fs/nfsd/nfssvc.c
View File

@@ -22,6 +22,7 @@
#include <linux/freezer.h>
#include <linux/fs_struct.h>
#include <linux/kthread.h>
#include <linux/swap.h>
#include <linux/sunrpc/types.h>
#include <linux/sunrpc/stats.h>
@@ -40,9 +41,6 @@
extern struct svc_program nfsd_program;
static int nfsd(void *vrqstp);
struct timeval nfssvc_boot;
static atomic_t nfsd_busy;
static unsigned long nfsd_last_call;
static DEFINE_SPINLOCK(nfsd_call_lock);
/*
* nfsd_mutex protects nfsd_serv -- both the pointer itself and the members
@@ -123,6 +121,8 @@ struct svc_program nfsd_program = {
};
u32 nfsd_supported_minorversion;
int nfsd_vers(int vers, enum vers_op change)
{
if (vers < NFSD_MINVERS || vers >= NFSD_NRVERS)
@@ -149,6 +149,28 @@ int nfsd_vers(int vers, enum vers_op change)
}
return 0;
}
int nfsd_minorversion(u32 minorversion, enum vers_op change)
{
if (minorversion > NFSD_SUPPORTED_MINOR_VERSION)
return -1;
switch(change) {
case NFSD_SET:
nfsd_supported_minorversion = minorversion;
break;
case NFSD_CLEAR:
if (minorversion == 0)
return -1;
nfsd_supported_minorversion = minorversion - 1;
break;
case NFSD_TEST:
return minorversion <= nfsd_supported_minorversion;
case NFSD_AVAIL:
return minorversion <= NFSD_SUPPORTED_MINOR_VERSION;
}
return 0;
}
/*
* Maximum number of nfsd processes
*/
@@ -200,6 +222,28 @@ void nfsd_reset_versions(void)
}
}
/*
* 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)
{
/* The percent of nr_free_buffer_pages used by the V4.1 server DRC */
#define NFSD_DRC_SIZE_SHIFT 7
nfsd_serv->sv_drc_max_pages = nr_free_buffer_pages()
>> NFSD_DRC_SIZE_SHIFT;
nfsd_serv->sv_drc_pages_used = 0;
dprintk("%s svc_drc_max_pages %u\n", __func__,
nfsd_serv->sv_drc_max_pages);
}
int nfsd_create_serv(void)
{
@@ -227,11 +271,12 @@ int nfsd_create_serv(void)
nfsd_max_blksize /= 2;
}
atomic_set(&nfsd_busy, 0);
nfsd_serv = svc_create_pooled(&nfsd_program, nfsd_max_blksize,
nfsd_last_thread, nfsd, THIS_MODULE);
if (nfsd_serv == NULL)
err = -ENOMEM;
else
set_max_drc();
do_gettimeofday(&nfssvc_boot); /* record boot time */
return err;
@@ -375,26 +420,6 @@ nfsd_svc(unsigned short port, int nrservs)
return error;
}
static inline void
update_thread_usage(int busy_threads)
{
unsigned long prev_call;
unsigned long diff;
int decile;
spin_lock(&nfsd_call_lock);
prev_call = nfsd_last_call;
nfsd_last_call = jiffies;
decile = busy_threads*10/nfsdstats.th_cnt;
if (decile>0 && decile <= 10) {
diff = nfsd_last_call - prev_call;
if ( (nfsdstats.th_usage[decile-1] += diff) >= NFSD_USAGE_WRAP)
nfsdstats.th_usage[decile-1] -= NFSD_USAGE_WRAP;
if (decile == 10)
nfsdstats.th_fullcnt++;
}
spin_unlock(&nfsd_call_lock);
}
/*
* This is the NFS server kernel thread
@@ -460,8 +485,6 @@ nfsd(void *vrqstp)
continue;
}
update_thread_usage(atomic_read(&nfsd_busy));
atomic_inc(&nfsd_busy);
/* Lock the export hash tables for reading. */
exp_readlock();
@@ -470,8 +493,6 @@ nfsd(void *vrqstp)
/* Unlock export hash tables */
exp_readunlock();
update_thread_usage(atomic_read(&nfsd_busy));
atomic_dec(&nfsd_busy);
}
/* Clear signals before calling svc_exit_thread() */
@@ -539,6 +560,10 @@ nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
+ rqstp->rq_res.head[0].iov_len;
rqstp->rq_res.head[0].iov_len += sizeof(__be32);
/* NFSv4.1 DRC requires statp */
if (rqstp->rq_vers == 4)
nfsd4_set_statp(rqstp, statp);
/* Now call the procedure handler, and encode NFS status. */
nfserr = proc->pc_func(rqstp, rqstp->rq_argp, rqstp->rq_resp);
nfserr = map_new_errors(rqstp->rq_vers, nfserr);
@@ -570,3 +595,10 @@ nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
nfsd_cache_update(rqstp, proc->pc_cachetype, statp + 1);
return 1;
}
int nfsd_pool_stats_open(struct inode *inode, struct file *file)
{
if (nfsd_serv == NULL)
return -ENODEV;
return svc_pool_stats_open(nfsd_serv, file);
}