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nfsd: make all of the nfsd stats per-network namespace 

We have a global set of counters that we modify for all of the nfsd
operations, but now that we're exposing these stats across all network
namespaces we need to make the stats also be per-network namespace.  We
already have some caching stats that are per-network namespace, so move
these definitions into the same counter and then adjust all the helpers
and users of these stats to provide the appropriate nfsd_net struct so
that the stats are maintained for the per-network namespace objects.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Josef Bacik 2024-01-26 10:39:47 -05:00 committed by Chuck Lever
parent 93483ac5fe
commit 4b14885411
10 changed files with 69 additions and 96 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
fs/nfsd/cache.h
View File

@ -80,8 +80,6 @@ enum {
int nfsd_drc_slab_create(void);
void nfsd_drc_slab_free(void);
int nfsd_net_reply_cache_init(struct nfsd_net *nn);
void nfsd_net_reply_cache_destroy(struct nfsd_net *nn);
int nfsd_reply_cache_init(struct nfsd_net *);
void nfsd_reply_cache_shutdown(struct nfsd_net *);
int nfsd_cache_lookup(struct svc_rqst *rqstp, unsigned int start,

17
fs/nfsd/netns.h
View File

@ -11,6 +11,7 @@
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include <linux/filelock.h>
#include <linux/nfs4.h>
#include <linux/percpu_counter.h>
#include <linux/siphash.h>
@ -29,7 +30,19 @@ enum {
NFSD_STATS_PAYLOAD_MISSES,
/* amount of memory (in bytes) currently consumed by the DRC */
NFSD_STATS_DRC_MEM_USAGE,
NFSD_NET_COUNTERS_NUM
NFSD_STATS_RC_HITS, /* repcache hits */
NFSD_STATS_RC_MISSES, /* repcache misses */
NFSD_STATS_RC_NOCACHE, /* uncached reqs */
NFSD_STATS_FH_STALE, /* FH stale error */
NFSD_STATS_IO_READ, /* bytes returned to read requests */
NFSD_STATS_IO_WRITE, /* bytes passed in write requests */
#ifdef CONFIG_NFSD_V4
NFSD_STATS_FIRST_NFS4_OP, /* count of individual nfsv4 operations */
NFSD_STATS_LAST_NFS4_OP = NFSD_STATS_FIRST_NFS4_OP + LAST_NFS4_OP,
#define NFSD_STATS_NFS4_OP(op) (NFSD_STATS_FIRST_NFS4_OP + (op))
NFSD_STATS_WDELEG_GETATTR, /* count of getattr conflict with wdeleg */
#endif
NFSD_STATS_COUNTERS_NUM
};
/*
@ -164,7 +177,7 @@ struct nfsd_net {
atomic_t num_drc_entries;
/* Per-netns stats counters */
struct percpu_counter counter[NFSD_NET_COUNTERS_NUM];
struct percpu_counter counter[NFSD_STATS_COUNTERS_NUM];
/* longest hash chain seen */
unsigned int longest_chain;

6
fs/nfsd/nfs4proc.c
View File

@ -2490,10 +2490,10 @@ nfsd4_proc_null(struct svc_rqst *rqstp)
return rpc_success;
}
static inline void nfsd4_increment_op_stats(u32 opnum)
static inline void nfsd4_increment_op_stats(struct nfsd_net *nn, u32 opnum)
{
if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_NFS4_OP(opnum)]);
percpu_counter_inc(&nn->counter[NFSD_STATS_NFS4_OP(opnum)]);
}
static const struct nfsd4_operation nfsd4_ops[];
@ -2768,7 +2768,7 @@ encode_op:
status, nfsd4_op_name(op->opnum));
nfsd4_cstate_clear_replay(cstate);
nfsd4_increment_op_stats(op->opnum);
nfsd4_increment_op_stats(nn, op->opnum);
}
fh_put(current_fh);

3
fs/nfsd/nfs4state.c
View File

@ -8450,6 +8450,7 @@ __be32
nfsd4_deleg_getattr_conflict(struct svc_rqst *rqstp, struct inode *inode)
{
__be32 status;
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
struct file_lock_context *ctx;
struct file_lock *fl;
struct nfs4_delegation *dp;
@ -8479,7 +8480,7 @@ nfsd4_deleg_getattr_conflict(struct svc_rqst *rqstp, struct inode *inode)
}
break_lease:
spin_unlock(&ctx->flc_lock);
nfsd_stats_wdeleg_getattr_inc();
nfsd_stats_wdeleg_getattr_inc(nn);
status = nfserrno(nfsd_open_break_lease(inode, NFSD_MAY_READ));
if (status != nfserr_jukebox ||
!nfsd_wait_for_delegreturn(rqstp, inode))

36
fs/nfsd/nfscache.c
View File

@ -176,27 +176,6 @@ void nfsd_drc_slab_free(void)
kmem_cache_destroy(drc_slab);
}
/**
* nfsd_net_reply_cache_init - per net namespace reply cache set-up
* @nn: nfsd_net being initialized
*
* Returns zero on succes; otherwise a negative errno is returned.
*/
int nfsd_net_reply_cache_init(struct nfsd_net *nn)
{
return nfsd_percpu_counters_init(nn->counter, NFSD_NET_COUNTERS_NUM);
}
/**
* nfsd_net_reply_cache_destroy - per net namespace reply cache tear-down
* @nn: nfsd_net being freed
*
*/
void nfsd_net_reply_cache_destroy(struct nfsd_net *nn)
{
nfsd_percpu_counters_destroy(nn->counter, NFSD_NET_COUNTERS_NUM);
}
int nfsd_reply_cache_init(struct nfsd_net *nn)
{
unsigned int hashsize;
@ -501,7 +480,7 @@ out:
int nfsd_cache_lookup(struct svc_rqst *rqstp, unsigned int start,
unsigned int len, struct nfsd_cacherep **cacherep)
{
struct nfsd_net *nn;
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
struct nfsd_cacherep *rp, *found;
__wsum csum;
struct nfsd_drc_bucket *b;
@ -510,7 +489,7 @@ int nfsd_cache_lookup(struct svc_rqst *rqstp, unsigned int start,
int rtn = RC_DOIT;
if (type == RC_NOCACHE) {
nfsd_stats_rc_nocache_inc();
nfsd_stats_rc_nocache_inc(nn);
goto out;
}
@ -520,7 +499,6 @@ int nfsd_cache_lookup(struct svc_rqst *rqstp, unsigned int start,
* Since the common case is a cache miss followed by an insert,
* preallocate an entry.
*/
nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
rp = nfsd_cacherep_alloc(rqstp, csum, nn);
if (!rp)
goto out;
@ -537,7 +515,7 @@ int nfsd_cache_lookup(struct svc_rqst *rqstp, unsigned int start,
nfsd_cacherep_dispose(&dispose);
nfsd_stats_rc_misses_inc();
nfsd_stats_rc_misses_inc(nn);
atomic_inc(&nn->num_drc_entries);
nfsd_stats_drc_mem_usage_add(nn, sizeof(*rp));
goto out;
@ -545,7 +523,7 @@ int nfsd_cache_lookup(struct svc_rqst *rqstp, unsigned int start,
found_entry:
/* We found a matching entry which is either in progress or done. */
nfsd_reply_cache_free_locked(NULL, rp, nn);
nfsd_stats_rc_hits_inc();
nfsd_stats_rc_hits_inc(nn);
rtn = RC_DROPIT;
rp = found;
@ -689,11 +667,11 @@ int nfsd_reply_cache_stats_show(struct seq_file *m, void *v)
seq_printf(m, "mem usage: %lld\n",
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_DRC_MEM_USAGE]));
seq_printf(m, "cache hits: %lld\n",
percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_HITS]));
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_HITS]));
seq_printf(m, "cache misses: %lld\n",
percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_MISSES]));
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_MISSES]));
seq_printf(m, "not cached: %lld\n",
percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_NOCACHE]));
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_NOCACHE]));
seq_printf(m, "payload misses: %lld\n",
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_PAYLOAD_MISSES]));
seq_printf(m, "longest chain len: %u\n", nn->longest_chain);

12
fs/nfsd/nfsctl.c
View File

@ -1671,7 +1671,7 @@ static __net_init int nfsd_net_init(struct net *net)
retval = nfsd_idmap_init(net);
if (retval)
goto out_idmap_error;
retval = nfsd_net_reply_cache_init(nn);
retval = nfsd_stat_counters_init(nn);
if (retval)
goto out_repcache_error;
nn->nfsd_versions = NULL;
@ -1701,7 +1701,7 @@ static __net_exit void nfsd_net_exit(struct net *net)
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
nfsd_proc_stat_shutdown(net);
nfsd_net_reply_cache_destroy(nn);
nfsd_stat_counters_destroy(nn);
nfsd_idmap_shutdown(net);
nfsd_export_shutdown(net);
nfsd_netns_free_versions(nn);
@ -1724,12 +1724,9 @@ static int __init init_nfsd(void)
retval = nfsd4_init_pnfs();
if (retval)
goto out_free_slabs;
retval = nfsd_stat_counters_init(); /* Statistics */
if (retval)
goto out_free_pnfs;
retval = nfsd_drc_slab_create();
if (retval)
goto out_free_stat;
goto out_free_pnfs;
nfsd_lockd_init(); /* lockd->nfsd callbacks */
retval = create_proc_exports_entry();
if (retval)
@ -1763,8 +1760,6 @@ out_free_exports:
out_free_lockd:
nfsd_lockd_shutdown();
nfsd_drc_slab_free();
out_free_stat:
nfsd_stat_counters_destroy();
out_free_pnfs:
nfsd4_exit_pnfs();
out_free_slabs:
@ -1782,7 +1777,6 @@ static void __exit exit_nfsd(void)
nfsd_drc_slab_free();
remove_proc_entry("fs/nfs/exports", NULL);
remove_proc_entry("fs/nfs", NULL);
nfsd_stat_counters_destroy();
nfsd_lockd_shutdown();
nfsd4_free_slabs();
nfsd4_exit_pnfs();

3
fs/nfsd/nfsfh.c
View File

@ -327,6 +327,7 @@ out:
__be32
fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type, int access)
{
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
struct svc_export *exp = NULL;
struct dentry *dentry;
__be32 error;
@ -395,7 +396,7 @@ skip_pseudoflavor_check:
out:
trace_nfsd_fh_verify_err(rqstp, fhp, type, access, error);
if (error == nfserr_stale)
nfsd_stats_fh_stale_inc(exp);
nfsd_stats_fh_stale_inc(nn, exp);
return error;
}

26
fs/nfsd/stats.c
View File

@ -34,15 +34,17 @@ struct svc_stat nfsd_svcstats = {
static int nfsd_show(struct seq_file *seq, void *v)
{
struct net *net = pde_data(file_inode(seq->file));
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
int i;
seq_printf(seq, "rc %lld %lld %lld\nfh %lld 0 0 0 0\nio %lld %lld\n",
percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_HITS]),
percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_MISSES]),
percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_NOCACHE]),
percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_FH_STALE]),
percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_IO_READ]),
percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_IO_WRITE]));
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_HITS]),
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_MISSES]),
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_NOCACHE]),
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_FH_STALE]),
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_IO_READ]),
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_IO_WRITE]));
/* thread usage: */
seq_printf(seq, "th %u 0", atomic_read(&nfsdstats.th_cnt));
@ -63,10 +65,10 @@ static int nfsd_show(struct seq_file *seq, void *v)
seq_printf(seq, "proc4ops %u", LAST_NFS4_OP + 1);
for (i = 0; i <= LAST_NFS4_OP; i++) {
seq_printf(seq, " %lld",
percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_NFS4_OP(i)]));
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_NFS4_OP(i)]));
}
seq_printf(seq, "\nwdeleg_getattr %lld",
percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_WDELEG_GETATTR]));
percpu_counter_sum_positive(&nn->counter[NFSD_STATS_WDELEG_GETATTR]));
seq_putc(seq, '\n');
#endif
@ -108,14 +110,14 @@ void nfsd_percpu_counters_destroy(struct percpu_counter counters[], int num)
percpu_counter_destroy(&counters[i]);
}
int nfsd_stat_counters_init(void)
int nfsd_stat_counters_init(struct nfsd_net *nn)
{
return nfsd_percpu_counters_init(nfsdstats.counter, NFSD_STATS_COUNTERS_NUM);
return nfsd_percpu_counters_init(nn->counter, NFSD_STATS_COUNTERS_NUM);
}
void nfsd_stat_counters_destroy(void)
void nfsd_stat_counters_destroy(struct nfsd_net *nn)
{
nfsd_percpu_counters_destroy(nfsdstats.counter, NFSD_STATS_COUNTERS_NUM);
nfsd_percpu_counters_destroy(nn->counter, NFSD_STATS_COUNTERS_NUM);
}
void nfsd_proc_stat_init(struct net *net)

54
fs/nfsd/stats.h
View File

@ -10,26 +10,7 @@
#include <uapi/linux/nfsd/stats.h>
#include <linux/percpu_counter.h>
enum {
NFSD_STATS_RC_HITS, /* repcache hits */
NFSD_STATS_RC_MISSES, /* repcache misses */
NFSD_STATS_RC_NOCACHE, /* uncached reqs */
NFSD_STATS_FH_STALE, /* FH stale error */
NFSD_STATS_IO_READ, /* bytes returned to read requests */
NFSD_STATS_IO_WRITE, /* bytes passed in write requests */
#ifdef CONFIG_NFSD_V4
NFSD_STATS_FIRST_NFS4_OP, /* count of individual nfsv4 operations */
NFSD_STATS_LAST_NFS4_OP = NFSD_STATS_FIRST_NFS4_OP + LAST_NFS4_OP,
#define NFSD_STATS_NFS4_OP(op) (NFSD_STATS_FIRST_NFS4_OP + (op))
NFSD_STATS_WDELEG_GETATTR, /* count of getattr conflict with wdeleg */
#endif
NFSD_STATS_COUNTERS_NUM
};
struct nfsd_stats {
struct percpu_counter counter[NFSD_STATS_COUNTERS_NUM];
atomic_t th_cnt; /* number of available threads */
};
@ -40,43 +21,46 @@ extern struct svc_stat nfsd_svcstats;
int nfsd_percpu_counters_init(struct percpu_counter *counters, int num);
void nfsd_percpu_counters_reset(struct percpu_counter *counters, int num);
void nfsd_percpu_counters_destroy(struct percpu_counter *counters, int num);
int nfsd_stat_counters_init(void);
void nfsd_stat_counters_destroy(void);
int nfsd_stat_counters_init(struct nfsd_net *nn);
void nfsd_stat_counters_destroy(struct nfsd_net *nn);
void nfsd_proc_stat_init(struct net *net);
void nfsd_proc_stat_shutdown(struct net *net);
static inline void nfsd_stats_rc_hits_inc(void)
static inline void nfsd_stats_rc_hits_inc(struct nfsd_net *nn)
{
percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_HITS]);
percpu_counter_inc(&nn->counter[NFSD_STATS_RC_HITS]);
}
static inline void nfsd_stats_rc_misses_inc(void)
static inline void nfsd_stats_rc_misses_inc(struct nfsd_net *nn)
{
percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_MISSES]);
percpu_counter_inc(&nn->counter[NFSD_STATS_RC_MISSES]);
}
static inline void nfsd_stats_rc_nocache_inc(void)
static inline void nfsd_stats_rc_nocache_inc(struct nfsd_net *nn)
{
percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_NOCACHE]);
percpu_counter_inc(&nn->counter[NFSD_STATS_RC_NOCACHE]);
}
static inline void nfsd_stats_fh_stale_inc(struct svc_export *exp)
static inline void nfsd_stats_fh_stale_inc(struct nfsd_net *nn,
struct svc_export *exp)
{
percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_FH_STALE]);
percpu_counter_inc(&nn->counter[NFSD_STATS_FH_STALE]);
if (exp && exp->ex_stats)
percpu_counter_inc(&exp->ex_stats->counter[EXP_STATS_FH_STALE]);
}
static inline void nfsd_stats_io_read_add(struct svc_export *exp, s64 amount)
static inline void nfsd_stats_io_read_add(struct nfsd_net *nn,
struct svc_export *exp, s64 amount)
{
percpu_counter_add(&nfsdstats.counter[NFSD_STATS_IO_READ], amount);
percpu_counter_add(&nn->counter[NFSD_STATS_IO_READ], amount);
if (exp && exp->ex_stats)
percpu_counter_add(&exp->ex_stats->counter[EXP_STATS_IO_READ], amount);
}
static inline void nfsd_stats_io_write_add(struct svc_export *exp, s64 amount)
static inline void nfsd_stats_io_write_add(struct nfsd_net *nn,
struct svc_export *exp, s64 amount)
{
percpu_counter_add(&nfsdstats.counter[NFSD_STATS_IO_WRITE], amount);
percpu_counter_add(&nn->counter[NFSD_STATS_IO_WRITE], amount);
if (exp && exp->ex_stats)
percpu_counter_add(&exp->ex_stats->counter[EXP_STATS_IO_WRITE], amount);
}
@ -97,9 +81,9 @@ static inline void nfsd_stats_drc_mem_usage_sub(struct nfsd_net *nn, s64 amount)
}
#ifdef CONFIG_NFSD_V4
static inline void nfsd_stats_wdeleg_getattr_inc(void)
static inline void nfsd_stats_wdeleg_getattr_inc(struct nfsd_net *nn)
{
percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_WDELEG_GETATTR]);
percpu_counter_inc(&nn->counter[NFSD_STATS_WDELEG_GETATTR]);
}
#endif
#endif /* _NFSD_STATS_H */

6
fs/nfsd/vfs.c
View File

@ -1002,7 +1002,9 @@ static __be32 nfsd_finish_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
unsigned long *count, u32 *eof, ssize_t host_err)
{
if (host_err >= 0) {
nfsd_stats_io_read_add(fhp->fh_export, host_err);
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
nfsd_stats_io_read_add(nn, fhp->fh_export, host_err);
*eof = nfsd_eof_on_read(file, offset, host_err, *count);
*count = host_err;
fsnotify_access(file);
@ -1185,7 +1187,7 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfsd_file *nf,
goto out_nfserr;
}
*cnt = host_err;
nfsd_stats_io_write_add(exp, *cnt);
nfsd_stats_io_write_add(nn, exp, *cnt);
fsnotify_modify(file);
host_err = filemap_check_wb_err(file->f_mapping, since);
if (host_err < 0)