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nfsd: protect concurrent access to nfsd stats counters

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nfsd stats counters can be updated by concurrent nfsd threads without any
protection.

Convert some nfsd_stats and nfsd_net struct members to use percpu counters.

The longest_chain* members of struct nfsd_net remain unprotected.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Amir Goldstein
2021-01-06 09:52:35 +02:00
committed by Chuck Lever
parent 1b76d1df1a
commit e567b98ce9
8 changed files with 194 additions and 55 deletions
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5
fs/nfsd/nfsctl.c
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@@ -1534,7 +1534,9 @@ static int __init init_nfsd(void)
retval = nfsd4_init_pnfs();
if (retval)
goto out_free_slabs;
nfsd_stat_init(); /* Statistics */
retval = nfsd_stat_init(); /* Statistics */
if (retval)
goto out_free_pnfs;
retval = nfsd_drc_slab_create();
if (retval)
goto out_free_stat;
@@ -1554,6 +1556,7 @@ out_free_lockd:
nfsd_drc_slab_free();
out_free_stat:
nfsd_stat_shutdown();
out_free_pnfs:
nfsd4_exit_pnfs();
out_free_slabs:
nfsd4_free_slabs();