Date: Tue, 11 Jun 2013 19:35:44 +0000 (UTC) From: Xin LI <delphij@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r251636 - in head/sys/cddl/contrib/opensolaris/uts/common: fs/zfs fs/zfs/sys sys/fm/fs Message-ID: <201306111935.r5BJZi7q065058@svn.freebsd.org>
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Author: delphij Date: Tue Jun 11 19:35:44 2013 New Revision: 251636 URL: http://svnweb.freebsd.org/changeset/base/251636 Log: MFV r251626: ZFS event processing should work on R/O root filesystems Illumos ZFS issues: 3749 zfs event processing should work on R/O root filesystems MFC after: 2 weeks Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_config.c head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/spa_impl.h head/sys/cddl/contrib/opensolaris/uts/common/sys/fm/fs/zfs.h Directory Properties: head/sys/cddl/contrib/opensolaris/ (props changed) Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c Tue Jun 11 19:29:31 2013 (r251635) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c Tue Jun 11 19:35:44 2013 (r251636) @@ -88,6 +88,12 @@ TUNABLE_INT("vfs.zfs.check_hostid", &che SYSCTL_INT(_vfs_zfs, OID_AUTO, check_hostid, CTLFLAG_RW, &check_hostid, 0, "Check hostid on import?"); +/* + * The interval, in seconds, at which failed configuration cache file writes + * should be retried. + */ +static int zfs_ccw_retry_interval = 300; + typedef enum zti_modes { zti_mode_fixed, /* value is # of threads (min 1) */ zti_mode_online_percent, /* value is % of online CPUs */ @@ -5852,13 +5858,34 @@ spa_async_resume(spa_t *spa) mutex_exit(&spa->spa_async_lock); } +static boolean_t +spa_async_tasks_pending(spa_t *spa) +{ + uint_t non_config_tasks; + uint_t config_task; + boolean_t config_task_suspended; + + non_config_tasks = spa->spa_async_tasks & ~SPA_ASYNC_CONFIG_UPDATE; + config_task = spa->spa_async_tasks & SPA_ASYNC_CONFIG_UPDATE; + if (spa->spa_ccw_fail_time == 0) { + config_task_suspended = B_FALSE; + } else { + config_task_suspended = + (gethrtime() - spa->spa_ccw_fail_time) < + (zfs_ccw_retry_interval * NANOSEC); + } + + return (non_config_tasks || (config_task && !config_task_suspended)); +} + static void spa_async_dispatch(spa_t *spa) { mutex_enter(&spa->spa_async_lock); - if (spa->spa_async_tasks && !spa->spa_async_suspended && + if (spa_async_tasks_pending(spa) && + !spa->spa_async_suspended && spa->spa_async_thread == NULL && - rootdir != NULL && !vn_is_readonly(rootdir)) + rootdir != NULL) spa->spa_async_thread = thread_create(NULL, 0, spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri); mutex_exit(&spa->spa_async_lock); Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_config.c ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_config.c Tue Jun 11 19:29:31 2013 (r251635) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_config.c Tue Jun 11 19:35:44 2013 (r251636) @@ -27,6 +27,7 @@ #include <sys/zfs_context.h> #include <sys/spa.h> +#include <sys/fm/fs/zfs.h> #include <sys/spa_impl.h> #include <sys/nvpair.h> #include <sys/uio.h> @@ -139,7 +140,7 @@ out: kobj_close_file(file); } -static void +static int spa_config_write(spa_config_dirent_t *dp, nvlist_t *nvl) { size_t buflen; @@ -147,13 +148,14 @@ spa_config_write(spa_config_dirent_t *dp vnode_t *vp; int oflags = FWRITE | FTRUNC | FCREAT | FOFFMAX; char *temp; + int err; /* * If the nvlist is empty (NULL), then remove the old cachefile. */ if (nvl == NULL) { - (void) vn_remove(dp->scd_path, UIO_SYSSPACE, RMFILE); - return; + err = vn_remove(dp->scd_path, UIO_SYSSPACE, RMFILE); + return (err); } /* @@ -174,12 +176,14 @@ spa_config_write(spa_config_dirent_t *dp */ (void) snprintf(temp, MAXPATHLEN, "%s.tmp", dp->scd_path); - if (vn_open(temp, UIO_SYSSPACE, oflags, 0644, &vp, CRCREAT, 0) == 0) { - if (vn_rdwr(UIO_WRITE, vp, buf, buflen, 0, UIO_SYSSPACE, - 0, RLIM64_INFINITY, kcred, NULL) == 0 && - VOP_FSYNC(vp, FSYNC, kcred, NULL) == 0) { - (void) vn_rename(temp, dp->scd_path, UIO_SYSSPACE); - } + err = vn_open(temp, UIO_SYSSPACE, oflags, 0644, &vp, CRCREAT, 0); + if (err == 0) { + err = vn_rdwr(UIO_WRITE, vp, buf, buflen, 0, UIO_SYSSPACE, + 0, RLIM64_INFINITY, kcred, NULL); + if (err == 0) + err = VOP_FSYNC(vp, FSYNC, kcred, NULL); + if (err == 0) + err = vn_rename(temp, dp->scd_path, UIO_SYSSPACE); (void) VOP_CLOSE(vp, oflags, 1, 0, kcred, NULL); } @@ -187,6 +191,7 @@ spa_config_write(spa_config_dirent_t *dp kmem_free(buf, buflen); kmem_free(temp, MAXPATHLEN); + return (err); } /* @@ -198,6 +203,8 @@ spa_config_sync(spa_t *target, boolean_t { spa_config_dirent_t *dp, *tdp; nvlist_t *nvl; + boolean_t ccw_failure; + int error; ASSERT(MUTEX_HELD(&spa_namespace_lock)); @@ -209,6 +216,7 @@ spa_config_sync(spa_t *target, boolean_t * cachefile is changed, the new one is pushed onto this list, allowing * us to update previous cachefiles that no longer contain this pool. */ + ccw_failure = B_FALSE; for (dp = list_head(&target->spa_config_list); dp != NULL; dp = list_next(&target->spa_config_list, dp)) { spa_t *spa = NULL; @@ -249,10 +257,32 @@ spa_config_sync(spa_t *target, boolean_t mutex_exit(&spa->spa_props_lock); } - spa_config_write(dp, nvl); + error = spa_config_write(dp, nvl); + if (error != 0) + ccw_failure = B_TRUE; nvlist_free(nvl); } + if (ccw_failure) { + /* + * Keep trying so that configuration data is + * written if/when any temporary filesystem + * resource issues are resolved. + */ + if (target->spa_ccw_fail_time == 0) { + zfs_ereport_post(FM_EREPORT_ZFS_CONFIG_CACHE_WRITE, + target, NULL, NULL, 0, 0); + } + target->spa_ccw_fail_time = gethrtime(); + spa_async_request(target, SPA_ASYNC_CONFIG_UPDATE); + } else { + /* + * Do not rate limit future attempts to update + * the config cache. + */ + target->spa_ccw_fail_time = 0; + } + /* * Remove any config entries older than the current one. */ Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/spa_impl.h ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/spa_impl.h Tue Jun 11 19:29:31 2013 (r251635) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/spa_impl.h Tue Jun 11 19:35:44 2013 (r251636) @@ -241,6 +241,7 @@ struct spa { uint64_t spa_deadman_calls; /* number of deadman calls */ uint64_t spa_sync_starttime; /* starting time fo spa_sync */ uint64_t spa_deadman_synctime; /* deadman expiration timer */ + hrtime_t spa_ccw_fail_time; /* Conf cache write fail time */ /* * spa_refcount & spa_config_lock must be the last elements * because refcount_t changes size based on compilation options. Modified: head/sys/cddl/contrib/opensolaris/uts/common/sys/fm/fs/zfs.h ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/sys/fm/fs/zfs.h Tue Jun 11 19:29:31 2013 (r251635) +++ head/sys/cddl/contrib/opensolaris/uts/common/sys/fm/fs/zfs.h Tue Jun 11 19:35:44 2013 (r251636) @@ -46,6 +46,7 @@ extern "C" { #define FM_EREPORT_ZFS_IO_FAILURE "io_failure" #define FM_EREPORT_ZFS_PROBE_FAILURE "probe_failure" #define FM_EREPORT_ZFS_LOG_REPLAY "log_replay" +#define FM_EREPORT_ZFS_CONFIG_CACHE_WRITE "config_cache_write" #define FM_EREPORT_PAYLOAD_ZFS_POOL "pool" #define FM_EREPORT_PAYLOAD_ZFS_POOL_FAILMODE "pool_failmode"
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