NFSD: Fix frame size warning in svc_export_parse()
fs/nfsd/export.c: In function 'svc_export_parse': fs/nfsd/export.c:737:1: warning: the frame size of 1040 bytes is larger than 1024 bytes [-Wframe-larger-than=] 737 | } On my systems, svc_export_parse() has a stack frame of over 800 bytes, not 1040, but nonetheless, it could do with some reduction. When a struct svc_export is on the stack, it's a temporary structure used as an argument, and not visible as an actual exported FS. No need to reserve space for export_stats in such cases. Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202310012359.YEw5IrK6-lkp@intel.com/ Cc: Amir Goldstein <amir73il@gmail.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
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@ -339,12 +339,16 @@ static int export_stats_init(struct export_stats *stats)
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static void export_stats_reset(struct export_stats *stats)
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{
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nfsd_percpu_counters_reset(stats->counter, EXP_STATS_COUNTERS_NUM);
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if (stats)
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nfsd_percpu_counters_reset(stats->counter,
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EXP_STATS_COUNTERS_NUM);
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}
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static void export_stats_destroy(struct export_stats *stats)
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{
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nfsd_percpu_counters_destroy(stats->counter, EXP_STATS_COUNTERS_NUM);
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if (stats)
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nfsd_percpu_counters_destroy(stats->counter,
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EXP_STATS_COUNTERS_NUM);
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}
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static void svc_export_put(struct kref *ref)
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@ -353,7 +357,8 @@ static void svc_export_put(struct kref *ref)
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path_put(&exp->ex_path);
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auth_domain_put(exp->ex_client);
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nfsd4_fslocs_free(&exp->ex_fslocs);
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export_stats_destroy(&exp->ex_stats);
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export_stats_destroy(exp->ex_stats);
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kfree(exp->ex_stats);
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kfree(exp->ex_uuid);
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kfree_rcu(exp, ex_rcu);
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}
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@ -767,13 +772,15 @@ static int svc_export_show(struct seq_file *m,
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seq_putc(m, '\t');
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seq_escape(m, exp->ex_client->name, " \t\n\\");
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if (export_stats) {
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seq_printf(m, "\t%lld\n", exp->ex_stats.start_time);
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struct percpu_counter *counter = exp->ex_stats->counter;
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seq_printf(m, "\t%lld\n", exp->ex_stats->start_time);
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seq_printf(m, "\tfh_stale: %lld\n",
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percpu_counter_sum_positive(&exp->ex_stats.counter[EXP_STATS_FH_STALE]));
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percpu_counter_sum_positive(&counter[EXP_STATS_FH_STALE]));
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seq_printf(m, "\tio_read: %lld\n",
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percpu_counter_sum_positive(&exp->ex_stats.counter[EXP_STATS_IO_READ]));
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percpu_counter_sum_positive(&counter[EXP_STATS_IO_READ]));
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seq_printf(m, "\tio_write: %lld\n",
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percpu_counter_sum_positive(&exp->ex_stats.counter[EXP_STATS_IO_WRITE]));
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percpu_counter_sum_positive(&counter[EXP_STATS_IO_WRITE]));
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seq_putc(m, '\n');
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return 0;
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}
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@ -819,7 +826,7 @@ static void svc_export_init(struct cache_head *cnew, struct cache_head *citem)
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new->ex_layout_types = 0;
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new->ex_uuid = NULL;
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new->cd = item->cd;
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export_stats_reset(&new->ex_stats);
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export_stats_reset(new->ex_stats);
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}
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static void export_update(struct cache_head *cnew, struct cache_head *citem)
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@ -856,7 +863,14 @@ static struct cache_head *svc_export_alloc(void)
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if (!i)
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return NULL;
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if (export_stats_init(&i->ex_stats)) {
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i->ex_stats = kmalloc(sizeof(*(i->ex_stats)), GFP_KERNEL);
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if (!i->ex_stats) {
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kfree(i);
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return NULL;
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}
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if (export_stats_init(i->ex_stats)) {
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kfree(i->ex_stats);
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kfree(i);
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return NULL;
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}
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@ -64,10 +64,10 @@ struct svc_export {
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struct cache_head h;
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struct auth_domain * ex_client;
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int ex_flags;
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int ex_fsid;
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struct path ex_path;
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kuid_t ex_anon_uid;
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kgid_t ex_anon_gid;
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int ex_fsid;
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unsigned char * ex_uuid; /* 16 byte fsid */
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struct nfsd4_fs_locations ex_fslocs;
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uint32_t ex_nflavors;
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@ -76,8 +76,8 @@ struct svc_export {
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struct nfsd4_deviceid_map *ex_devid_map;
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struct cache_detail *cd;
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struct rcu_head ex_rcu;
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struct export_stats ex_stats;
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unsigned long ex_xprtsec_modes;
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struct export_stats *ex_stats;
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};
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/* an "export key" (expkey) maps a filehandlefragement to an
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@ -61,22 +61,22 @@ static inline void nfsd_stats_rc_nocache_inc(void)
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static inline void nfsd_stats_fh_stale_inc(struct svc_export *exp)
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{
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percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_FH_STALE]);
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if (exp)
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percpu_counter_inc(&exp->ex_stats.counter[EXP_STATS_FH_STALE]);
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if (exp && exp->ex_stats)
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percpu_counter_inc(&exp->ex_stats->counter[EXP_STATS_FH_STALE]);
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}
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static inline void nfsd_stats_io_read_add(struct svc_export *exp, s64 amount)
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{
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percpu_counter_add(&nfsdstats.counter[NFSD_STATS_IO_READ], amount);
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if (exp)
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percpu_counter_add(&exp->ex_stats.counter[EXP_STATS_IO_READ], amount);
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if (exp && exp->ex_stats)
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percpu_counter_add(&exp->ex_stats->counter[EXP_STATS_IO_READ], amount);
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}
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static inline void nfsd_stats_io_write_add(struct svc_export *exp, s64 amount)
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{
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percpu_counter_add(&nfsdstats.counter[NFSD_STATS_IO_WRITE], amount);
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if (exp)
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percpu_counter_add(&exp->ex_stats.counter[EXP_STATS_IO_WRITE], amount);
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if (exp && exp->ex_stats)
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percpu_counter_add(&exp->ex_stats->counter[EXP_STATS_IO_WRITE], amount);
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}
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static inline void nfsd_stats_payload_misses_inc(struct nfsd_net *nn)
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