Date: Mon, 14 Jan 2013 20:31:46 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r245433 - head/sys/geom/raid Message-ID: <201301142031.r0EKVkhq020045@svn.freebsd.org>
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Author: mav Date: Mon Jan 14 20:31:45 2013 New Revision: 245433 URL: http://svnweb.freebsd.org/changeset/base/245433 Log: Keep value of orig_config_id metadata field. Windows driver writes there previous value of config_id when it is changed in some cases. I guess it may be used do avoid some split-brain conditions. Modified: head/sys/geom/raid/md_intel.c Modified: head/sys/geom/raid/md_intel.c ============================================================================== --- head/sys/geom/raid/md_intel.c Mon Jan 14 20:26:50 2013 (r245432) +++ head/sys/geom/raid/md_intel.c Mon Jan 14 20:31:45 2013 (r245433) @@ -216,6 +216,7 @@ struct g_raid_md_intel_pervolume { struct g_raid_md_intel_object { struct g_raid_md_object mdio_base; uint32_t mdio_config_id; + uint32_t mdio_orig_config_id; uint32_t mdio_generation; struct intel_raid_conf *mdio_meta; struct callout mdio_start_co; /* STARTING state timer. */ @@ -717,7 +718,7 @@ intel_meta_write_spare(struct g_consumer memcpy(&meta->version[0], INTEL_VERSION_1000, sizeof(INTEL_VERSION_1000) - 1); meta->config_size = INTEL_MAX_MD_SIZE(1); - meta->config_id = arc4random(); + meta->config_id = meta->orig_config_id = arc4random(); meta->generation = 1; meta->total_disks = 1; meta->disk[0] = *d; @@ -1318,7 +1319,7 @@ g_raid_md_create_intel(struct g_raid_md_ char name[16]; mdi = (struct g_raid_md_intel_object *)md; - mdi->mdio_config_id = arc4random(); + mdi->mdio_config_id = mdi->mdio_orig_config_id = arc4random(); mdi->mdio_generation = 0; snprintf(name, sizeof(name), "Intel-%08x", mdi->mdio_config_id); sc = g_raid_create_node(mp, name, md); @@ -1463,6 +1464,7 @@ search: } else { /* Not found matching node -- create one. */ result = G_RAID_MD_TASTE_NEW; mdi->mdio_config_id = meta->config_id; + mdi->mdio_orig_config_id = meta->orig_config_id; snprintf(name, sizeof(name), "Intel-%08x", meta->config_id); sc = g_raid_create_node(mp, name, md); md->mdo_softc = sc; @@ -2292,6 +2294,7 @@ g_raid_md_write_intel(struct g_raid_md_o memcpy(&meta->intel_id[0], INTEL_MAGIC, sizeof(INTEL_MAGIC) - 1); meta->config_size = INTEL_MAX_MD_SIZE(numdisks); meta->config_id = mdi->mdio_config_id; + meta->orig_config_id = mdi->mdio_orig_config_id; meta->generation = mdi->mdio_generation; meta->attributes = INTEL_ATTR_CHECKSUM; meta->total_disks = numdisks;
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