Date: Fri, 22 Jun 2018 00:41:37 +0000 (UTC) From: Rick Macklem <rmacklem@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r335523 - projects/pnfs-planb-server/sys/fs/nfsserver Message-ID: <201806220041.w5M0fbBa063068@repo.freebsd.org>
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Author: rmacklem Date: Fri Jun 22 00:41:36 2018 New Revision: 335523 URL: https://svnweb.freebsd.org/changeset/base/335523 Log: Add a counter that limits the number of DSs that can be disabled to the mirror level - 1. Also, make a small change such that a Write that fails with EACCES doesn't cause a DS to be disabled. Modified: projects/pnfs-planb-server/sys/fs/nfsserver/nfs_nfsdstate.c Modified: projects/pnfs-planb-server/sys/fs/nfsserver/nfs_nfsdstate.c ============================================================================== --- projects/pnfs-planb-server/sys/fs/nfsserver/nfs_nfsdstate.c Fri Jun 22 00:36:41 2018 (r335522) +++ projects/pnfs-planb-server/sys/fs/nfsserver/nfs_nfsdstate.c Fri Jun 22 00:41:36 2018 (r335523) @@ -128,6 +128,7 @@ static int nfsrv_returnoldstateid = 0, nfsrv_clients = static int nfsrv_clienthighwater = NFSRV_CLIENTHIGHWATER; static int nfsrv_nogsscallback = 0; static volatile int nfsrv_writedelegcnt = 0; +static int nfsrv_faildscnt; /* local functions */ static void nfsrv_dumpaclient(struct nfsclient *clp, @@ -6748,10 +6749,9 @@ nfsrv_flexlayouterr(struct nfsrv_descript *nd, uint32_ NFSD_DEBUG(4, "flexlayouterr op=%d stat=%d\n", opnum, stat); /* - * Except for NFSERR_ACCES errors for Reading, - * shut the mirror down. + * Except for NFSERR_ACCES errors, disable the mirror. */ - if (opnum != NFSV4OP_READ || stat != NFSERR_ACCES) + if (stat != NFSERR_ACCES) nfsrv_delds(devid, p); } } @@ -7514,6 +7514,10 @@ nfsrv_deldsnmp(struct nfsmount *nmp, NFSPROC_T *p) NFSD_DEBUG(4, "deldsdvp\n"); NFSDDSLOCK(); + if (nfsrv_faildscnt <= 0) { + NFSDDSUNLOCK(); + return (NULL); + } fndds = nfsv4_findmirror(nmp); if (fndds != NULL) nfsrv_deleteds(fndds); @@ -7547,6 +7551,10 @@ nfsrv_delds(char *devid, NFSPROC_T *p) nmp = NULL; fndmirror = 0; NFSDDSLOCK(); + if (nfsrv_faildscnt <= 0) { + NFSDDSUNLOCK(); + return (ENXIO); + } TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) { if (NFSBCMP(ds->nfsdev_deviceid, devid, NFSX_V4DEVICEID) == 0 && ds->nfsdev_nmp != NULL) { @@ -7593,6 +7601,7 @@ nfsrv_deleteds(struct nfsdevice *fndds) NFSD_DEBUG(4, "deleteds: deleting a mirror\n"); fndds->nfsdev_nmp = NULL; + nfsrv_faildscnt--; } /* @@ -7714,6 +7723,8 @@ nfsrv_createdevids(struct nfsd_nfsd_args *args, NFSPRO nfsrv_maxpnfsmirror = 1; return (ENXIO); } + /* We can fail at most one less DS than the mirror level. */ + nfsrv_faildscnt = nfsrv_maxpnfsmirror - 1; /* * Allocate the nfslayout hash table now, since this is a pNFS server.
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