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25f06d677a81a65ca98fa3d725ab5031a4864104
mirror_zfs/include/sys
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Brian Behlendorf 25f06d677a Fix /etc/hostid on root pool deadlock 
Accidentally introduced by dc04a8c which now takes the SCL_VDEV lock
as a reader in zfs_blkptr_verify().  A deadlock can occur if the
/etc/hostid file resides on a dataset in the same pool.  This is
because reading the /etc/hostid file may occur while the caller is
holding the SCL_VDEV lock as a writer.  For example, to perform a
`zpool attach` as shown in the abbreviated stack below.

To resolve the issue we cache the system's hostid when initializing
the spa_t, or when modifying the multihost property.  The cached
value is then relied upon for subsequent accesses.

Call Trace:
    spa_config_enter+0x1e8/0x350 [zfs]
    zfs_blkptr_verify+0x33c/0x4f0 [zfs] <--- trying read lock
    zio_read+0x6c/0x140 [zfs]
    ...
    vfs_read+0xfc/0x1e0
    kernel_read+0x50/0x90
    ...
    spa_get_hostid+0x1c/0x38 [zfs]
    spa_config_generate+0x1a0/0x610 [zfs]
    vdev_label_init+0xa0/0xc80 [zfs]
    vdev_create+0x98/0xe0 [zfs]
    spa_vdev_attach+0x14c/0xb40 [zfs] <--- grabbed write lock

Reviewed-by: loli10K <ezomori.nozomu@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #9256 
Closes #9285
2019-09-10 13:42:30 -07:00
..
crypto
Add support for selecting encryption backend
2018-08-02 11:59:24 -07:00
fm
Add zpool status -s (slow I/Os) and -p (parseable)
2018-11-08 16:47:24 -08:00
fs
Fix typos in include/
2019-08-30 09:53:15 -07:00
lua
Fix typos in include/
2019-08-30 09:53:15 -07:00
sysevent
Add TRIM support
2019-03-29 09:13:20 -07:00
abd.h
single-chunk scatter ABDs can be treated as linear
2019-06-11 09:02:31 -07:00
aggsum.h
OpenZFS 8484 - Implement aggregate sum and use for arc counters
2018-06-06 09:35:59 -07:00
arc_impl.h
Fix typos in include/
2019-08-30 09:53:15 -07:00
arc.h
Fix typos in include/
2019-08-30 09:53:15 -07:00
avl_impl.h
Support custom build directories and move includes
2010-09-08 12:38:56 -07:00
avl.h
Fix typos in include/
2019-08-30 09:53:15 -07:00
blkptr.h
OpenZFS 8067 - zdb should be able to dump literal embedded block pointer
2017-07-07 11:28:01 -07:00
bplist.h
Fast Clone Deletion
2019-07-26 10:54:14 -07:00
bpobj.h
Fast Clone Deletion
2019-07-26 10:54:14 -07:00
bptree.h
Illumos 4914 - zfs on-disk bookmark structure should be named *_phys_t
2014-08-06 14:48:41 -07:00
bqueue.h
Implement Redacted Send/Receive
2019-06-19 09:48:12 -07:00
cityhash.h
OpenZFS 8484 - Implement aggregate sum and use for arc counters
2018-06-06 09:35:59 -07:00
dataset_kstats.h
port async unlinked drain from illumos-nexenta
2019-02-12 10:41:15 -08:00
dbuf.h
Decrease contention on dn_struct_rwlock
2019-07-08 13:18:50 -07:00
ddt.h
Remove dedupditto functionality
2019-06-19 14:54:02 -07:00
dmu_impl.h
Implement Redacted Send/Receive
2019-06-19 09:48:12 -07:00
dmu_objset.h
Fast Clone Deletion
2019-07-26 10:54:14 -07:00
dmu_recv.h
Implement Redacted Send/Receive
2019-06-19 09:48:12 -07:00
dmu_redact.h
Implement Redacted Send/Receive
2019-06-19 09:48:12 -07:00
dmu_send.h
Implement Redacted Send/Receive
2019-06-19 09:48:12 -07:00
dmu_traverse.h
Implement Redacted Send/Receive
2019-06-19 09:48:12 -07:00
dmu_tx.h
Linux 4.19-rc3+ compat: Remove refcount_t compat
2018-09-26 10:29:26 -07:00
dmu_zfetch.h
Replace zf_rwlock with a mutex
2019-07-25 11:57:58 -07:00
dmu.h
Fix typos in include/
2019-08-30 09:53:15 -07:00
dnode.h
Fix zil replay panic when TX_REMOVE followed by TX_CREATE
2019-08-28 10:42:02 -07:00
dsl_bookmark.h
Fix comments on zfs_bookmark_phys
2019-06-22 16:32:26 -07:00
dsl_crypt.h
Allow unencrypted children of encrypted datasets
2019-06-20 12:29:51 -07:00
dsl_dataset.h
Implement Redacted Send/Receive
2019-06-19 09:48:12 -07:00
dsl_deadlist.h
Add fast path for zfs_ioc_space_snaps() handling of empty_bpobj
2019-08-20 11:34:52 -07:00
dsl_deleg.h
Remove code for zfs remap
2019-06-24 16:44:01 -07:00
dsl_destroy.h
Fast Clone Deletion
2019-07-26 10:54:14 -07:00
dsl_dir.h
Fast Clone Deletion
2019-07-26 10:54:14 -07:00
dsl_pool.h
Fast Clone Deletion
2019-07-26 10:54:14 -07:00
dsl_prop.h
Illumos 6171 - dsl_prop_unregister() slows down dataset eviction.
2016-01-12 10:53:12 -08:00
dsl_scan.h
OpenZFS 7614, 9064 - zfs device evacuation/removal
2018-04-14 12:16:17 -07:00
dsl_synctask.h
OpenZFS 9425 - channel programs can be interrupted
2019-06-22 16:51:46 -07:00
dsl_userhold.h
Illumos #3740
2013-11-04 11:17:48 -08:00
edonr.h
OpenZFS 4185 - add new cryptographic checksums to ZFS: SHA-512, Skein, Edon-R
2016-10-03 14:51:15 -07:00
efi_partition.h
Fix typos in include/
2019-08-30 09:53:15 -07:00
frame.h
Suppress incorrect objtool warnings
2017-12-07 10:28:50 -08:00
hkdf.h
Encryption patch follow-up
2017-10-11 16:54:48 -04:00
Makefile.am
OpenZFS restructuring - move platform specific sources
2019-09-06 11:26:26 -07:00
metaslab_impl.h
Keep more metaslabs loaded
2019-08-29 10:20:36 -07:00
metaslab.h
Cap metaslab memory usage
2019-08-16 09:08:21 -06:00
mmp.h
MMP interval and fail_intervals in uberblock
2019-03-21 12:47:57 -07:00
mntent.h
Make zfs mount according to relatime config in dataset
2016-04-05 18:55:59 -07:00
multilist.h
Avoid extra taskq_dispatch() calls by DMU
2019-06-25 12:03:38 -07:00
note.h
Update build system and packaging
2018-05-29 16:00:33 -07:00
nvpair_impl.h
OpenZFS 9580 - Add a hash-table on top of nvlist to speed-up operations
2018-07-30 11:30:03 -07:00
nvpair.h
Add new fnvlist_lookup_* functions
2018-10-03 15:30:55 -07:00
objlist.h
Implement Redacted Send/Receive
2019-06-19 09:48:12 -07:00
pathname.h
Disable unused pathname::pn_path* (unneeded in Linux)
2019-07-15 13:57:56 -07:00
qat.h
OpenZFS restructuring - move platform specific sources
2019-09-06 11:26:26 -07:00
range_tree.h
Metaslab max_size should be persisted while unloaded
2019-08-05 14:34:27 -07:00
refcount.h
Prevent race in blkptr_verify against device removal
2019-08-13 21:24:43 -06:00
rrwlock.h
Linux 4.19-rc3+ compat: Remove refcount_t compat
2018-09-26 10:29:26 -07:00
sa_impl.h
Linux 4.19-rc3+ compat: Remove refcount_t compat
2018-09-26 10:29:26 -07:00
sa.h
Fix typos in include/
2019-08-30 09:53:15 -07:00
sdt.h
Add line info and SET_ERROR() to ZFS debug log
2017-07-25 23:09:48 -07:00
sha2.h
OpenZFS 4185 - add new cryptographic checksums to ZFS: SHA-512, Skein, Edon-R
2016-10-03 14:51:15 -07:00
skein.h
OpenZFS 4185 - add new cryptographic checksums to ZFS: SHA-512, Skein, Edon-R
2016-10-03 14:51:15 -07:00
spa_boot.h
Support custom build directories and move includes
2010-09-08 12:38:56 -07:00
spa_checkpoint.h
Serialize ZTHR operations to eliminate races
2019-01-13 10:09:46 -08:00
spa_checksum.h
Implementation of AVX2 optimized Fletcher-4
2016-06-02 14:30:51 -07:00
spa_impl.h
Fix /etc/hostid on root pool deadlock
2019-09-10 13:42:30 -07:00
spa_log_spacemap.h
Log Spacemap Project
2019-07-16 10:11:49 -07:00
spa.h
Fix /etc/hostid on root pool deadlock
2019-09-10 13:42:30 -07:00
space_map.h
Log Spacemap Project
2019-07-16 10:11:49 -07:00
space_reftree.h
Illumos #4101, #4102, #4103, #4105, #4106
2014-07-22 09:39:16 -07:00
sysevent.h
OpenZFS 6939 - add sysevents to zfs core for commands
2017-07-12 21:28:13 -07:00
trace_acl.h
8659 static dtrace probes unavailable on non-GPL modules
2019-07-08 11:20:53 -07:00
trace_arc.h
8659 static dtrace probes unavailable on non-GPL modules
2019-07-08 11:20:53 -07:00
trace_common.h
OpenZFS 6531 - Provide mechanism to artificially limit disk performance
2016-05-26 10:11:51 -07:00
trace_dbgmsg.h
8659 static dtrace probes unavailable on non-GPL modules
2019-07-08 11:20:53 -07:00
trace_dbuf.h
8659 static dtrace probes unavailable on non-GPL modules
2019-07-08 11:20:53 -07:00
trace_dmu.h
8659 static dtrace probes unavailable on non-GPL modules
2019-07-08 11:20:53 -07:00
trace_dnode.h
8659 static dtrace probes unavailable on non-GPL modules
2019-07-08 11:20:53 -07:00
trace_multilist.h
8659 static dtrace probes unavailable on non-GPL modules
2019-07-08 11:20:53 -07:00
trace_rrwlock.h
8659 static dtrace probes unavailable on non-GPL modules
2019-07-08 11:20:53 -07:00
trace_txg.h
8659 static dtrace probes unavailable on non-GPL modules
2019-07-08 11:20:53 -07:00
trace_vdev.h
Fix typos in include/
2019-08-30 09:53:15 -07:00
trace_zil.h
8659 static dtrace probes unavailable on non-GPL modules
2019-07-08 11:20:53 -07:00
trace_zio.h
8659 static dtrace probes unavailable on non-GPL modules
2019-07-08 11:20:53 -07:00
trace_zrlock.h
8659 static dtrace probes unavailable on non-GPL modules
2019-07-08 11:20:53 -07:00
trace.h
Fix typos in include/
2019-08-30 09:53:15 -07:00
txg_impl.h
Fix typos in include/
2019-08-30 09:53:15 -07:00
txg.h
OpenZFS 9425 - channel programs can be interrupted
2019-06-22 16:51:46 -07:00
u8_textprep_data.h
Support custom build directories and move includes
2010-09-08 12:38:56 -07:00
u8_textprep.h
Support custom build directories and move includes
2010-09-08 12:38:56 -07:00
uberblock_impl.h
MMP interval and fail_intervals in uberblock
2019-03-21 12:47:57 -07:00
uberblock.h
Multi-modifier protection (MMP)
2017-07-13 13:54:00 -04:00
uio_impl.h
deadlock between mm_sem and tx assign in zfs_write() and page fault
2018-10-16 11:11:24 -07:00
unique.h
Illumos #3742
2013-11-04 10:55:25 -08:00
uuid.h
Support custom build directories and move includes
2010-09-08 12:38:56 -07:00
vdev_disk.h
Add support for autoexpand property
2018-07-23 15:40:15 -07:00
vdev_file.h
Use a dedicated taskq for vdev_file
2016-12-21 10:47:15 -08:00
vdev_impl.h
Log Spacemap Project
2019-07-16 10:11:49 -07:00
vdev_indirect_births.h
OpenZFS 7614, 9064 - zfs device evacuation/removal
2018-04-14 12:16:17 -07:00
vdev_indirect_mapping.h
OpenZFS 7614, 9064 - zfs device evacuation/removal
2018-04-14 12:16:17 -07:00
vdev_initialize.h
Add TRIM support
2019-03-29 09:13:20 -07:00
vdev_raidz_impl.h
Fix typos in include/
2019-08-30 09:53:15 -07:00
vdev_raidz.h
Linux 5.0 compat: SIMD compatibility
2019-07-12 09:31:20 -07:00
vdev_removal.h
panic in removal_remap test on 4K devices
2019-06-13 13:12:39 -07:00
vdev_trim.h
Add TRIM support
2019-03-29 09:13:20 -07:00
vdev.h
Add TRIM support
2019-03-29 09:13:20 -07:00
xvattr.h
Linux 4.18 compat: inode timespec -> timespec64
2018-06-19 21:51:18 -07:00
zap_impl.h
OpenZFS 7793 - ztest fails assertion in dmu_tx_willuse_space
2017-03-07 09:51:59 -08:00
zap_leaf.h
Fix ENOSPC in "Handle zap_add() failures in ..."
2018-04-18 14:19:50 -07:00
zap.h
fat zap should prefetch when iterating
2019-06-12 13:13:09 -07:00
zcp_global.h
OpenZFS 7431 - ZFS Channel Programs
2018-02-08 15:28:18 -08:00
zcp_iter.h
OpenZFS 7431 - ZFS Channel Programs
2018-02-08 15:28:18 -08:00
zcp_prop.h
OpenZFS 7431 - ZFS Channel Programs
2018-02-08 15:28:18 -08:00
zcp.h
Fix typos in include/
2019-08-30 09:53:15 -07:00
zfeature.h
Revert "zhack: Add 'feature disable' command"
2016-05-17 11:52:07 -07:00
zfs_acl.h
Fix typos in include/
2019-08-30 09:53:15 -07:00
zfs_context.h
Make module tunables cross platform
2019-09-05 14:49:49 -07:00
zfs_debug.h
Log Spacemap Project
2019-07-16 10:11:49 -07:00
zfs_delay.h
Update build system and packaging
2018-05-29 16:00:33 -07:00
zfs_fuid.h
Update build system and packaging
2018-05-29 16:00:33 -07:00
zfs_ioctl.h
Implement Redacted Send/Receive
2019-06-19 09:48:12 -07:00
zfs_onexit.h
Support custom build directories and move includes
2010-09-08 12:38:56 -07:00
zfs_project.h
Project Quota on ZFS
2018-02-13 14:54:54 -08:00
zfs_ratelimit.h
Change checksum & IO delay ratelimit values
2018-03-04 17:34:51 -08:00
zfs_rlock.h
OpenZFS 9689 - zfs range lock code should not be zpl-specific
2018-10-11 10:19:33 -07:00
zfs_sa.h
Project Quota on ZFS
2018-02-13 14:54:54 -08:00
zfs_stat.h
Support custom build directories and move includes
2010-09-08 12:38:56 -07:00
zfs_sysfs.h
Fix in-kernel sysfs entries
2018-09-06 21:44:52 -07:00
zfs_znode.h
Fix deadlock in 'zfs rollback'
2019-08-27 09:55:51 -07:00
zil_impl.h
make zil max block size tunable
2019-06-10 11:48:42 -07:00
zil.h
Fix typos in include/
2019-08-30 09:53:15 -07:00
zio_checksum.h
Remove dependency on linear ABD
2017-03-29 12:24:51 -07:00
zio_compress.h
lz4_decompress_abd declared but not defined
2019-06-13 13:14:34 -07:00
zio_crypt.h
Enable SIMD for encryption
2019-09-10 10:45:46 -07:00
zio_impl.h
Fix typos in include/
2019-08-30 09:53:15 -07:00
zio_priority.h
Add TRIM support
2019-03-29 09:13:20 -07:00
zio.h
Remove dedupditto functionality
2019-06-19 14:54:02 -07:00
zrlock.h
OpenZFS 6328 - Fix cstyle errors in zfs codebase
2017-01-12 09:42:11 -08:00
zthr.h
Fast Clone Deletion
2019-07-26 10:54:14 -07:00
zvol.h
Add port of FreeBSD 'volmode' property
2017-07-12 13:05:37 -07:00