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2d82ea8b11
freebsd-dev/module/zfs
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Brian Behlendorf 2d82ea8b11 Use udev for partition detection 
When ZFS partitions a block device it must wait for udev to create
both a device node and all the device symlinks.  This process takes
a variable length of time and depends on factors such how many links
must be created, the complexity of the rules, etc.  Complicating
the situation further it is not uncommon for udev to create and
then remove a link multiple times while processing the udev rules.

Given the above, the existing scheme of waiting for an expected
partition to appear by name isn't 100% reliable.  At this point
udev may still remove and recreate think link resulting in the
kernel modules being unable to open the device.

In order to address this the zpool_label_disk_wait() function
has been updated to use libudev.  Until the registered system
device acknowledges that it in fully initialized the function
will wait.  Once fully initialized all device links are checked
and allowed to settle for 50ms.  This makes it far more likely
that all the device nodes will exist when the kernel modules
need to open them.

For systems without libudev an alternate zpool_label_disk_wait()
was updated to include a settle time.  In addition, the kernel
modules were updated to include retry logic for this ENOENT case.
Due to the improved checks in the utilities it is unlikely this
logic will be invoked.  However, if the rare event it is needed
it will prevent a failure.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Richard Laager <rlaager@wiktel.com>
Closes #4523
Closes #3708
Closes #4077
Closes #4144
Closes #4214
Closes #4517
2016-04-25 11:13:20 -07:00
..
arc.c Add l2arc_max_block_size tunable 2016-02-25 09:44:00 -08:00
blkptr.c Illumos 4757, 4913 2014-08-01 14:28:05 -07:00
bplist.c Change KM_PUSHPAGE -> KM_SLEEP 2015-01-16 14:41:26 -08:00
bpobj.c Illumos 5810 - zdb should print details of bpobj 2015-05-11 15:10:24 -07:00
bptree.c Illumos 5960, 5925 2016-01-08 15:08:19 -08:00
bqueue.c Allow 16M send/recv blocks 2016-01-08 20:23:23 -05:00
dbuf_stats.c Illumos 5497 - lock contention on arcs_mtx 2015-06-11 10:27:25 -07:00
dbuf.c Illumos 5045 - use atomic_{inc,dec}_* instead of atomic_add_* 2016-01-15 15:38:36 -08:00
ddt_zap.c Change KM_PUSHPAGE -> KM_SLEEP 2015-01-16 14:41:26 -08:00
ddt.c Handle zap_lookup() failure in ddt_object_load() 2015-08-19 14:32:50 -07:00
dmu_diff.c Illumos 5960, 5925 2016-01-08 15:08:19 -08:00
dmu_object.c Illumos 6370 - ZFS send fails to transmit some holes 2016-03-10 14:25:22 -08:00
dmu_objset.c Add support for asynchronous zvol minor operations 2016-03-10 09:49:22 -08:00
dmu_send.c Add support for asynchronous zvol minor operations 2016-03-10 09:49:22 -08:00
dmu_traverse.c Illumos 6370 - ZFS send fails to transmit some holes 2016-03-10 14:25:22 -08:00
dmu_tx.c Illumos 4950 - files sometimes can't be removed from a full filesystem 2016-01-21 16:59:30 -08:00
dmu_zfetch.c Illumos 6281 - prefetching should apply to 1MB reads 2016-01-12 13:51:27 -08:00
dmu.c Illumos 4950 - files sometimes can't be removed from a full filesystem 2016-01-21 16:59:30 -08:00
dnode_sync.c Illumos 5960, 5925 2016-01-08 15:08:19 -08:00
dnode.c Illumos 5987 - zfs prefetch code needs work 2016-01-12 09:02:33 -08:00
dsl_bookmark.c Illumos 4951 - ZFS administrative commands should use reserved space 2015-05-04 09:41:10 -07:00
dsl_dataset.c Add support for asynchronous zvol minor operations 2016-03-10 09:49:22 -08:00
dsl_deadlist.c Handle damaged blk_birth in dsl_deadlist_insert() 2015-12-15 16:12:31 -08:00
dsl_deleg.c Illumos 4951 - ZFS administrative commands should use reserved space 2015-05-04 09:41:10 -07:00
dsl_destroy.c Add support for asynchronous zvol minor operations 2016-03-10 09:49:22 -08:00
dsl_dir.c Add support for asynchronous zvol minor operations 2016-03-10 09:49:22 -08:00
dsl_pool.c Align thread priority with Linux defaults 2015-07-28 13:36:47 -07:00
dsl_prop.c Illumos 6681 - zfs list burning lots of time in dodefault() via dsl_prop_* 2016-03-15 18:46:44 -07:00
dsl_scan.c Illumos 6537 - Panic on zpool scrub with DEBUG kernel 2016-02-05 11:29:32 -08:00
dsl_synctask.c Illumos 4951 - ZFS administrative commands should use reserved space 2015-05-04 09:41:10 -07:00
dsl_userhold.c Illumos 4951 - ZFS administrative commands should use reserved space 2015-05-04 09:41:10 -07:00
fm.c Illumos 5045 - use atomic_{inc,dec}_* instead of atomic_add_* 2016-01-15 15:38:36 -08:00
gzip.c cstyle: Resolve C style issues 2013-12-18 16:46:35 -08:00
lz4.c Change KM_PUSHPAGE -> KM_SLEEP 2015-01-16 14:41:26 -08:00
lzjb.c Change KM_PUSHPAGE -> KM_SLEEP 2015-01-16 14:41:26 -08:00
Makefile.in Add pn_alloc()/pn_free() functions 2016-04-21 09:49:25 -07:00
metaslab.c gcc build error: -Wbool-compare in metaslab.c 2016-03-30 09:36:51 -07:00
multilist.c Identify locks flagged by lockdep 2015-12-22 10:21:33 -08:00
pathname.c Add pn_alloc()/pn_free() functions 2016-04-21 09:49:25 -07:00
range_tree.c Illumos 5163 - arc should reap range_seg_cache 2015-06-25 08:58:16 -07:00
refcount.c Change KM_PUSHPAGE -> KM_SLEEP 2015-01-16 14:41:26 -08:00
rrwlock.c Illumos 5008 - lock contention (rrw_exit) while running a read only load 2015-07-06 09:34:13 -07:00
sa.c Prevent SA length overflow 2015-12-30 13:20:12 -08:00
sha256.c Add linux sha2 support 2010-08-31 13:41:59 -07:00
spa_boot.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
spa_config.c Illumos 3749 - zfs event processing should work on R/O root filesystems 2016-01-12 14:42:32 -08:00
spa_errlog.c Illumos 4914 - zfs on-disk bookmark structure should be named *_phys_t 2014-08-06 14:48:41 -07:00
spa_history.c Illumos 5027 - zfs large block support 2015-05-11 12:23:16 -07:00
spa_misc.c Change KM_SLEEP to TQ_SLEEP in spa_deadman() 2016-03-09 10:41:31 -08:00
spa_stats.c Illumos 5369 - arc flags should be an enum 2015-06-11 10:27:25 -07:00
spa.c Add support for asynchronous zvol minor operations 2016-03-10 09:49:22 -08:00
space_map.c Illumos 5960, 5925 2016-01-08 15:08:19 -08:00
space_reftree.c Change KM_PUSHPAGE -> KM_SLEEP 2015-01-16 14:41:26 -08:00
trace.c Illumos 5497 - lock contention on arcs_mtx 2015-06-11 10:27:25 -07:00
txg.c Increase default user space stack size 2016-01-13 13:55:12 -08:00
uberblock.c Illumos 5347 - idle pool may run itself out of space 2015-07-14 10:35:21 -07:00
unique.c Change KM_PUSHPAGE -> KM_SLEEP 2015-01-16 14:41:26 -08:00
vdev_cache.c Illumos 5045 - use atomic_{inc,dec}_* instead of atomic_add_* 2016-01-15 15:38:36 -08:00
vdev_disk.c Use udev for partition detection 2016-04-25 11:13:20 -07:00
vdev_file.c Disable LBA weighting on files and SSDs 2015-09-01 15:22:07 -07:00
vdev_label.c Illumos 6414 - vdev_config_sync could be simpler 2016-01-28 12:44:39 -05:00
vdev_mirror.c FreeBSD r256956: Improve ZFS N-way mirror read performance by using load and locality information. 2016-02-26 11:24:35 -08:00
vdev_missing.c Illumos #5244 - zio pipeline callers should explicitly invoke next stage 2015-04-30 15:07:47 -07:00
vdev_queue.c FreeBSD r256956: Improve ZFS N-way mirror read performance by using load and locality information. 2016-02-26 11:24:35 -08:00
vdev_raidz.c Illumos #5244 - zio pipeline callers should explicitly invoke next stage 2015-04-30 15:07:47 -07:00
vdev_root.c Illumos #3598 2013-10-31 14:58:04 -07:00
vdev.c Identify locks flagged by lockdep 2015-12-22 10:21:33 -08:00
zap_leaf.c Illumos 5314 - Remove "dbuf phys" db->db_data pointer aliases in ZFS 2015-04-28 16:25:20 -07:00
zap_micro.c Add zap_prefetch() interface 2015-12-04 09:39:20 -08:00
zap.c Illumos 5960, 5925 2016-01-08 15:08:19 -08:00
zfeature_common.c Illumos 5959 - clean up per-dataset feature count code 2015-12-04 14:20:20 -08:00
zfeature.c Illumos 5959 - clean up per-dataset feature count code 2015-12-04 14:20:20 -08:00
zfs_acl.c Fix atime handling and relatime 2016-04-05 18:54:55 -07:00
zfs_byteswap.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
zfs_ctldir.c Fix atime handling and relatime 2016-04-05 18:54:55 -07:00
zfs_debug.c Add dbgmsg kstat 2015-09-04 16:08:14 -07:00
zfs_dir.c Fix atime handling and relatime 2016-04-05 18:54:55 -07:00
zfs_fm.c Remove wrong ASSERT in annotate_ecksum 2016-02-17 10:43:02 -08:00
zfs_fuid.c Illumos #3522 2013-10-30 14:51:27 -07:00
zfs_ioctl.c Add support for asynchronous zvol minor operations 2016-03-10 09:49:22 -08:00
zfs_log.c Illumos 5027 - zfs large block support 2015-05-11 12:23:16 -07:00
zfs_onexit.c zfsdev_getminor() should check for invalid file handles 2015-06-22 17:02:13 -07:00
zfs_replay.c Add pn_alloc()/pn_free() functions 2016-04-21 09:49:25 -07:00
zfs_rlock.c Change KM_PUSHPAGE -> KM_SLEEP 2015-01-16 14:41:26 -08:00
zfs_sa.c Fix atime handling and relatime 2016-04-05 18:54:55 -07:00
zfs_vfsops.c Fix zsb->z_hold_mtx deadlock 2016-01-15 15:33:45 -08:00
zfs_vnops.c Add pn_alloc()/pn_free() functions 2016-04-21 09:49:25 -07:00
zfs_znode.c Enable lazytime semantic for atime 2016-04-05 18:55:51 -07:00
zil.c Align thread priority with Linux defaults 2015-07-28 13:36:47 -07:00
zio_checksum.c Illumos 4757, 4913 2014-08-01 14:28:05 -07:00
zio_compress.c Illumos 5661 - ZFS: "compression = on" should use lz4 if feature is enabled 2015-07-10 12:11:45 -07:00
zio_inject.c Fix zpool_scrub_* test cases 2016-03-30 09:30:34 -07:00
zio.c Illumos 5438 - zfs_blkptr_verify should continue after zfs_panic_recover 2016-01-12 13:54:05 -08:00
zle.c Update core ZFS code from build 121 to build 141. 2010-05-28 13:45:14 -07:00
zpl_ctldir.c Linux 3.18 compat: Snapshot auto-mounting 2015-08-31 13:54:39 -07:00
zpl_export.c zfsctl: No need to sync ctldir inodes 2015-08-31 13:54:39 -07:00
zpl_file.c Fix atime handling and relatime 2016-04-05 18:54:55 -07:00
zpl_inode.c Add pn_alloc()/pn_free() functions 2016-04-21 09:49:25 -07:00
zpl_super.c Disable zpl_nr_cached_objects() callback 2015-09-25 12:45:42 -07:00
zpl_xattr.c Linux 4.5 compat: Use xattr_handler->name for acl 2016-04-25 08:42:08 -07:00
zrlock.c Illumos 5812 - assertion failed in zrl_tryenter(): zr_owner==NULL 2015-04-30 14:43:40 -07:00
zvol.c Fix lock order inversion with zvol_open() 2016-03-10 09:53:36 -08:00