Commit Graph

29 Commits

Author SHA1 Message Date
Toomas Soome
79a4bf8975 loader: factor out label and uberblock load from vdev_probe, add MMP checks
Clean up the label read.
2019-11-03 21:19:52 +00:00
Toomas Soome
0c0a882c7a loader: we do not support booting from pool with log device
If pool has log device, stop there and tell about it.
2019-11-03 13:25:47 +00:00
Toomas Soome
abca0bd501 loader: calculate physical vdev psize from asize
Since physical device asize is calculated from psize and the asize is stored
in pool label, we can use asize to set the value of psize, which is used to
calculate the location of the pool labels.

MFC after:	1 week
2019-11-03 11:09:06 +00:00
Toomas Soome
903fe2b762 loader: zio_checksum_verify should check byteswap
We do have both native and byteswap checksum callbacks in place but the
selection is not wired.

MFC after:	1 week
2019-10-27 08:35:29 +00:00
Toomas Soome
b1b9326846 loader: support com.delphix:removing
We should support removing vdev from boot pool. Update loader zfs reader
to support com.delphix:removing.

Reviewed by:	allanjude
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D18901
2019-08-08 18:08:13 +00:00
Matt Macy
27e05a1902 zfsboot: support newer ZFS versions
declare v3 objset size/layout to fix userboot and possibly other loader issues

- fix for userboot assertion failure in zfs_dev_close in free due to out of bounds write
- fix for zfs_alloc / zfs_free mismatch assertion failure when booting GPT on BIOS
2019-01-03 22:49:11 +00:00
Toomas Soome
b40aaca6dd loader should support large_dnode
The zfsonlinux feature large_dnode is not yet supported by the loader.

Reviewed by:	avg, allanjude
Differential Revision:	https://reviews.freebsd.org/D12288
2017-09-12 13:45:04 +00:00
Toomas Soome
84a6eddc43 loader: update symlink support in zfs reader
As the current zfs file system is providing symlink via system attributes, need
to update the code accordingly.

Note, as the zfsboot code does not free the memory at this time, the
object list will put some stress on the boot2 heap, eventually we should
address the issue.

Reviewed by:	allanjude, smh
Approved by:	allanjude (mentor)
Differential Revision:	https://reviews.freebsd.org/D9706
2017-02-22 22:00:50 +00:00
Toomas Soome
2c55d0903d Add SHA512, skein, large blocks support for loader zfs.
Updated sha512 from illumos.
Using skein from freebsd crypto tree.
Since loader itself is using 64MB memory for heap, updated zfsboot to
use same, and this also allows to support zfs large blocks.

Note, adding additional features does increate zfsboot code, therefore
this update does increase zfsboot code to 128k, also I have ported gptldr.S
update to zfsldr.S to support 64k+ code.

With this update, boot1.efi has almost reached the current limit of the size
set for it, so one of the future patches for boot1.efi will need to
increase the limit.

Currently known missing zfs features in boot loader are edonr and gzip support.

Reviewed by:	delphij, imp
Approved by:	imp (mentor)
Obtained from:	sha256.c update and skein_zfs.c stub from illumos.
Differential Revision:	https://reviews.freebsd.org/D7418
2016-08-18 00:37:07 +00:00
Allan Jude
4deb8929ea Make boot code and loader check for unsupported ZFS feature flags
OpenZFS uses feature flags instead of a zpool version number to track
features since the split from Oracle. In addition to avoiding confusion
on ZFS vs OpenZFS version numbers, this also allows features to be added
to different operating systems that use OpenZFS in different order.

The previous zfs boot code (gptzfsboot) and loader (zfsloader) blindly
tries to read the pool, and if failed provided only a vague error message.

With this change, both the boot code and loader check the MOS features
list in the ZFS label and compare it against the list of features that
the loader supports. If any unsupported feature is active, the pool is
not considered as a candidate for booting, and a helpful diagnostic
message is printed to the screen. Features that are merely enabled via
zpool upgrade, but not in use, do not block booting from the pool.

Submitted by:	Toomas Soome <tsoome@me.com>
Reviewed by:	delphij, mav
Relnotes:	yes
Differential Revision:	https://reviews.freebsd.org/D6857
2016-08-01 19:37:43 +00:00
Xin LI
8bcd603968 MFV r274273:
ZFS large block support.

Please note that booting from datasets that have recordsize greater
than 128KB is not supported (but it's Okay to enable the feature on
the pool).  This *may* remain unchanged because of memory constraint.

Limited safety belt is provided for mounted root filesystem but use
caution is advised.

Illumos issue:
    5027 zfs large block support

MFC after:	1 month
2014-11-10 08:20:21 +00:00
Xin LI
263f396e2b MFV r271510:
Enforce 4K as smallest indirect block size (previously the smallest
indirect block size was 1K but that was never used).

This makes some space estimates more accurate and uses less memory
for some data structures.

Illumos issue:
    5141 zfs minimum indirect block size is 4K

MFC after:	2 weeks
2014-09-13 16:26:14 +00:00
Xin LI
29441ba3fa MFV r267565:
4757 ZFS embedded-data block pointers ("zero block compression")
4913 zfs release should not be subject to space checks

MFC after:	2 weeks
2014-07-01 06:43:15 +00:00
Xin LI
f4c8ba8370 MFV r259170:
4370 avoid transmitting holes during zfs send

4371 DMU code clean up

illumos/illumos-gate@43466aae47

NOTE: Make sure the boot code is updated if a zpool upgrade is
done on boot zpool.

MFC after:	2 weeks
2014-01-01 00:45:28 +00:00
Xin LI
ef17620fc8 MFV r245512:
* Illumos zfs issue #3035 [1] LZ4 compression support in ZFS.

LZ4 is a new high-speed BSD-licensed compression algorithm created
by Yann Collet that delivers very high compression and decompression
performance compared to lzjb (>50% faster on compression, >80% faster
on decompression and around 3x faster on compression of incompressible
data), while giving better compression ratio [1].

This version of LZ4 corresponds to upstream's [2] revision 85.

Please note that for obvious reasons this is not backward read
compatible.  This means once a pool have LZ4 compressed data, these
data can no longer be read by older ZFS implementations.

Local changes:

 - On-stack hash table disabled and using kernel slab allocator
   instead, at this time.  This requires larger kernel thread stack
   for zio workers.  This may change in the future should we adjusted
   the zio workers' thread stack size.
 - likely and unlikely will be undefined if they are already defined,
   this is required for i386 XEN build.
 - Removed De Bruijn sequence based __builtin_ctz family of builtins
   in favor of the latter.  Both GCC and clang supports these builtins.
 - Changed the way the LZ4 code detects endianness.
 - Manual pages modifications to mention the feature based on Illumos
   counterpart.
 - Boot loader changes to make it support LZ4 decompression.

[1] https://www.illumos.org/issues/3035
[2] http://code.google.com/p/lz4/source/list

Obtained from:	Illumos (13921:9d721847e469)
Tested on:	FreeBSD/amd64
MFC after:	1 month
2013-02-09 06:39:28 +00:00
Andriy Gapon
4ed4f4cf95 forgotten file from r240346
Pointyhat to:	avg
MFC after:	10 days
X-MFC with:	r240346
2012-09-11 08:45:49 +00:00
Martin Matuska
2d9cf57e18 Introduce "feature flags" for ZFS pools (bump SPA version to 5000).
Add first feature "com.delphix:async_destroy" (asynchronous destroy
of ZFS datasets).
Implement features support in ZFS boot code.

Illumos revisions merged:
13700:2889e2596bd6
13701:1949b688d5fb
2619 asynchronous destruction of ZFS file systems
2747 SPA versioning with zfs feature flags

References:
https://www.illumos.org/issues/2619
https://www.illumos.org/issues/2747

Obtained from:	illumos (issue #2619, #2747)
MFC after:	1 month
2012-06-11 11:35:22 +00:00
Andriy Gapon
9da75f3a36 add a zfs spa_t change missed in r235329
sys/cddl/boot is obviously not under sys/boot...

Pointed out by:	Jan Beich <jbeich@tormail.org>
Pointyhat to:	avg
MFC after:	1 month
2012-05-12 16:36:54 +00:00
Pawel Jakub Dawidek
10b9d77bf1 Finally... Import the latest open-source ZFS version - (SPA) 28.
Few new things available from now on:

- Data deduplication.
- Triple parity RAIDZ (RAIDZ3).
- zfs diff.
- zpool split.
- Snapshot holds.
- zpool import -F. Allows to rewind corrupted pool to earlier
  transaction group.
- Possibility to import pool in read-only mode.

MFC after:	1 month
2011-02-27 19:41:40 +00:00
Pawel Jakub Dawidek
6a85b5e08a Forgot to commit this file. Add ZPOOL_CONFIG_IS_LOG.
Reported by:	keramida
MFC after:	2 weeks
2010-09-10 04:44:13 +00:00
Martin Matuska
8fc257994d Merge ZFS version 15 and almost all OpenSolaris bugfixes referenced
in Solaris 10 updates 141445-09 and 142901-14.

Detailed information:
(OpenSolaris revisions and Bug IDs, Solaris 10 patch numbers)

7844:effed23820ae
6755435	zfs_open() and zfs_close() needs to use ZFS_ENTER/ZFS_VERIFY_ZP (141445-01)

7897:e520d8258820
6748436	inconsistent zpool.cache in boot_archive could panic a zfs root filesystem upon boot-up (141445-01)

7965:b795da521357
6740164	zpool attach can create an illegal root pool (141909-02)

8084:b811cc60d650
6769612	zpool_import() will continue to write to cachefile even if altroot is set (N/A)

8121:7fd09d4ebd9c
6757430	want an option for zdb to disable space map loading and leak tracking (141445-01)

8129:e4f45a0bfbb0
6542860	ASSERT: reason != VDEV_LABEL_REMOVE||vdev_inuse(vd, crtxg, reason, 0) (141445-01)

8188:fd00c0a81e80
6761100	want zdb option to select older uberblocks (141445-01)

8190:6eeea43ced42
6774886	zfs_setattr() won't allow ndmp to restore SUNWattr_rw (141445-01)

8225:59a9961c2aeb
6737463	panic while trying to write out config file if root pool import fails (141445-01)

8227:f7d7be9b1f56
6765294	Refactor replay (141445-01)

8228:51e9ca9ee3a5
6572357	libzfs should do more to avoid mnttab lookups (141909-01)
6572376	zfs_iter_filesystems and zfs_iter_snapshots get objset stats twice (141909-01)

8241:5a60f16123ba
6328632	zpool offline is a bit too conservative (141445-01)
6739487	ASSERT: txg <= spa_final_txg due to scrub/export race (141445-01)
6767129	ASSERT: cvd->vdev_isspare, in spa_vdev_detach() (141445-01)
6747698	checksum failures after offline -t / export / import / scrub (141445-01)
6745863	ZFS writes to disk after it has been offlined (141445-01)
6722540	50% slowdown on scrub/resilver with certain vdev configurations (141445-01)
6759999	resilver logic rewrites ditto blocks on both source and destination (141445-01)
6758107	I/O should never suspend during spa_load() (141445-01)
6776548	codereview(1) runs off the page when faced with multi-line comments (N/A)
6761406	AMD errata 91 workaround doesn't work on 64-bit systems (141445-01)

8242:e46e4b2f0a03
6770866	GRUB/ZFS should require physical path or devid, but not both (141445-01)

8269:03a7e9050cfd
6674216	"zfs share" doesn't work, but "zfs set sharenfs=on" does (141445-01)
6621164	$SRC/cmd/zfs/zfs_main.c seems to have a syntax error in the translation note (141445-01)
6635482	i18n problems in libzfs_dataset.c and zfs_main.c (141445-01)
6595194	"zfs get" VALUE column is as wide as NAME (141445-01)
6722991	vdev_disk.c: error checking for ddi_pathname_to_dev_t() must test for NODEV (141445-01)
6396518	ASSERT strings shouldn't be pre-processed (141445-01)

8274:846b39508aff
6713916	scrub/resilver needlessly decompress data (141445-01)

8343:655db2375fed
6739553	libzfs_status msgid table is out of sync (141445-01)
6784104	libzfs unfairly rejects numerical values greater than 2^63 (141445-01)
6784108	zfs_realloc() should not free original memory on failure (141445-01)

8525:e0e0e525d0f8
6788830	set large value to reservation cause core dump (141445-01)
6791064	want sysevents for ZFS scrub (141445-01)
6791066	need to be able to set cachefile on faulted pools (141445-01)
6791071	zpool_do_import() should not enable datasets on faulted pools (141445-01)
6792134	getting multiple properties on a faulted pool leads to confusion (141445-01)

8547:bcc7b46e5ff7
6792884	Vista clients cannot access .zfs (141445-01)

8632:36ef517870a3
6798384	It can take a village to raise a zio (141445-01)

8636:7e4ce9158df3
6551866	deadlock between zfs_write(), zfs_freesp(), and zfs_putapage() (141909-01)
6504953	zfs_getpage() misunderstands VOP_GETPAGE() interface (141909-01)
6702206	ZFS read/writer lock contention throttles sendfile() benchmark (141445-01)
6780491	Zone on a ZFS filesystem has poor fork/exec performance (141445-01)
6747596	assertion failed: DVA_EQUAL(BP_IDENTITY(&zio->io_bp_orig), BP_IDENTITY(zio->io_bp))); (141445-01)

8692:692d4668b40d
6801507	ZFS read aggregation should not mind the gap (141445-01)

8697:e62d2612c14d
6633095	creating a filesystem with many properties set is slow (141445-01)

8768:dfecfdbb27ed
6775697	oracle crashes when overwriting after hitting quota on zfs (141909-01)

8811:f8deccf701cf
6790687	libzfs mnttab caching ignores external changes (141445-01)
6791101	memory leak from libzfs_mnttab_init (141445-01)

8845:91af0d9c0790
6800942	smb_session_create() incorrectly stores IP addresses (N/A)
6582163	Access Control List (ACL) for shares (141445-01)
6804954	smb_search - shortname field should be space padded following the NULL terminator (N/A)
6800184	Panic at smb_oplock_conflict+0x35() (N/A)

8876:59d2e67b4b65
6803822	Reboot after replacement of system disk in a ZFS mirror drops to grub> prompt (141445-01)

8924:5af812f84759
6789318	coredump when issue zdb -uuuu poolname/ (141445-01)
6790345 zdb -dddd -e poolname coredump (141445-01)
6797109 zdb: 'zdb -dddddd pool_name/fs_name inode' coredump if the file with inode was deleted (141445-01)
6797118 zdb: 'zdb -dddddd poolname inum' coredump if I miss the fs name (141445-01)
6803343 shareiscsi=on failed, iscsitgtd failed request to share (141445-01)

9030:243fd360d81f
6815893	hang mounting a dataset after booting into a new boot environment (141445-01)

9056:826e1858a846
6809691	'zpool create -f' no longer overwrites ufs infomation (141445-01)

9179:d8fbd96b79b3
6790064	zfs needs to determine uid and gid earlier in create process (141445-01)

9214:8d350e5d04aa
6604992	forced unmount + being in .zfs/snapshot/<snap1> = not happy (141909-01)
6810367	assertion failed: dvp->v_flag & VROOT, file: ../../common/fs/gfs.c, line: 426 (141909-01)

9229:e3f8b41e5db4
6807765	ztest_dsl_dataset_promote_busy needs to clean up after ENOSPC (141445-01)

9230:e4561e3eb1ef
6821169	offlining a device results in checksum errors (141445-01)
6821170	ZFS should not increment error stats for unavailable devices (141445-01)
6824006	need to increase issue and interrupt taskqs threads in zfs (141445-01)

9234:bffdc4fc05c4
6792139	recovering from a suspended pool needs some work (141445-01)
6794830	reboot command hangs on a failed zfs pool (141445-01)

9246:67c03c93c071
6824062	System panicked in zfs_mount due to NULL pointer dereference when running btts and svvs tests (141909-01)

9276:a8a7fc849933
6816124	System crash running zpool destroy on broken zpool (141445-03)

9355:09928982c591
6818183	zfs snapshot -r is slow due to set_snap_props() doing txg_wait_synced() for each new snapshot (141445-03)

9391:413d0661ef33
6710376	log device can show incorrect status when other parts of pool are degraded (141445-03)

9396:f41cf682d0d3 (part already merged)
6501037	want user/group quotas on ZFS (141445-03)
6827260	assertion failed in arc_read(): hdr == pbuf->b_hdr (141445-03)
6815592	panic: No such hold X on refcount Y from zfs_znode_move (141445-03)
6759986	zfs list shows temporary %clone when doing online zfs recv (141445-03)

9404:319573cd93f8
6774713	zfs ignores canmount=noauto when sharenfs property != off (141445-03)

9412:4aefd8704ce0
6717022	ZFS DMU needs zero-copy support (141445-03)

9425:e7ffacaec3a8
6799895	spa_add_spares() needs to be protected by config lock (141445-03)
6826466	want to post sysevents on hot spare activation (141445-03)
6826468	spa 'allowfaulted' needs some work (141445-03)
6826469	kernel support for storing vdev FRU information (141445-03)
6826470	skip posting checksum errors from DTL regions of leaf vdevs (141445-03)
6826471	I/O errors after device remove probe can confuse FMA (141445-03)
6826472	spares should enjoy some of the benefits of cache devices (141445-03)

9443:2a96d8478e95
6833711	gang leaders shouldn't have to be logical (141445-03)

9463:d0bd231c7518
6764124	want zdb to be able to checksum metadata blocks only (141445-03)

9465:8372081b8019
6830237	zfs panic in zfs_groupmember() (141445-03)

9466:1fdfd1fed9c4
6833162	phantom log device in zpool status (141445-03)

9469:4f68f041ddcd
6824968	add ZFS userquota support to rquotad (141445-03)

9470:6d827468d7b5
6834217	godfather I/O should reexecute (141445-03)

9480:fcff33da767f
6596237	Stop looking and start ganging (141909-02)

9493:9933d599bc93
6623978	lwb->lwb_buf != NULL, file ../../../uts/common/fs/zfs/zil.c, line 787, function zil_lwb_commit (141445-06)

9512:64cafcbcc337
6801810	Commit of aligned streaming rewrites to ZIL device causes unwanted disk reads (N/A)

9515:d3b739d9d043
6586537	async zio taskqs can block out userland commands (142901-09)

9554:787363635b6a
6836768	zfs_userspace() callback has no way to indicate failure (N/A)

9574:1eb6a6ab2c57
6838062	zfs panics when an error is encountered in space_map_load() (141909-02)

9583:b0696cd037cc
6794136	Panic BAD TRAP: type=e when importing degraded zraid pool. (141909-03)

9630:e25a03f552e0
6776104	"zfs import" deadlock between spa_unload() and spa_async_thread() (141445-06)

9653:a70048a304d1
6664765	Unable to remove files when using fat-zap and quota exceeded on ZFS filesystem (141445-06)

9688:127be1845343
6841321	zfs userspace / zfs get userused@ doesn't work on mounted snapshot (N/A)
6843069	zfs get userused@S-1-... doesn't work (N/A)

9873:8ddc892eca6e
6847229	assertion failed: refcount_count(&tx->tx_space_written) + delta <= tx->tx_space_towrite in dmu_tx.c (141445-06)

9904:d260bd3fd47c
6838344	kernel heap corruption detected on zil while stress testing (141445-06)

9951:a4895b3dd543
6844900	zfs_ioc_userspace_upgrade leaks (N/A)

10040:38b25aeeaf7a
6857012	zfs panics on zpool import (141445-06)

10000:241a51d8720c
6848242	zdb -e no longer works as expected (N/A)

10100:4a6965f6bef8
6856634	snv_117 not booting: zfs_parse_bootfs: error2 (141445-07)

10160:a45b03783d44
6861983	zfs should use new name <-> SID interfaces (N/A)
6862984	userquota commands can hang (141445-06)

10299:80845694147f
6696858	zfs receive of incremental replication stream can dereference NULL pointer and crash (N/A)

10302:a9e3d1987706
6696858	zfs receive of incremental replication stream can dereference NULL pointer and crash (fix lint) (N/A)

10575:2a8816c5173b (partial merge)
6882227 spa_async_remove() shouldn't do a full clear (142901-14)

10800:469478b180d9
6880764	fsync on zfs is broken if writes are greater than 32kb on a hard crash and no log attached (142901-09)
6793430 zdb -ivvvv assertion failure: bp->blk_cksum.zc_word[2] == dmu_objset_id(zilog->zl_os) (N/A)

10801:e0bf032e8673 (partial merge)
6822816 assertion failed: zap_remove_int(ds_next_clones_obj) returns ENOENT (142901-09)

10810:b6b161a6ae4a
6892298 buf->b_hdr->b_state != arc_anon, file: ../../common/fs/zfs/arc.c, line: 2849 (142901-09)

10890:499786962772
6807339	spurious checksum errors when replacing a vdev (142901-13)

11249:6c30f7dfc97b
6906110 bad trap panic in zil_replay_log_record (142901-13)
6906946 zfs replay isn't handling uid/gid correctly (142901-13)

11454:6e69bacc1a5a
6898245 suspended zpool should not cause rest of the zfs/zpool commands to hang (142901-10)

11546:42ea6be8961b (partial merge)
6833999 3-way deadlock in dsl_dataset_hold_ref() and dsl_sync_task_group_sync() (142901-09)

Discussed with:	pjd
Approved by:	delphij (mentor)
Obtained from:	OpenSolaris (multiple Bug IDs)
MFC after:	2 months
2010-07-12 23:49:04 +00:00
Martin Matuska
c43d127a9a Import OpenSolaris revision 7837:001de5627df3
It includes the following changes:
- parallel reads in traversal code (Bug ID 6333409)
- faster traversal for zfs send (Bug ID 6418042)
- traversal code cleanup (Bug ID 6725675)
- fix for two scrub related bugs (Bug ID 6729696, 6730101)
- fix assertion in dbuf_verify (Bug ID 6752226)
- fix panic during zfs send with i/o errors (Bug ID 6577985)
- replace P2CROSS with P2BOUNDARY (Bug ID 6725680)

List of OpenSolaris Bug IDs:
6333409, 6418042, 6757112, 6725668, 6725675, 6725680,
6725698, 6729696, 6730101, 6752226, 6577985, 6755042

Approved by:	pjd, delphij (mentor)
Obtained from:	OpenSolaris (multiple Bug IDs)
MFC after:	1 week
2010-05-13 20:32:56 +00:00
Xin LI
03ec6213ee Instead of assuming all vdevs are healthy, check the newest vdev label
for each vdev's status.  Booting from a degraded vdev should now be
more robust.

Submitted by:	Matt Reimer <mattjreimer at gmail.com>
Sponsored by:	VPOP Technologies, Inc.
MFC after:	2 weeks
2010-01-06 23:09:23 +00:00
Xin LI
9189129097 Apply OpenSolaris revision 8012 which brings our zpool to version 14,
making it possible for zpools created on OpenSolaris 2009.06 be used
on FreeBSD.

PR:		kern/141800
Submitted by:	mm
Reviewed by:	pjd, trasz
Obtained from:	OpenSolaris
MFC after:	2 weeks
2009-12-28 22:15:11 +00:00
Robert Noland
14c436e101 Correct some issues with zfs boot.
- Teach it to read gang blocks. (essentially untested)
   If you see "ZFS: gang block detected!", please let
   me know, so we can either remove the printf if it
   works, or fix it if it doesn't.

 - If multiple partitions exist on a disk, probe them all.
   We also need to reset dsk->start to 0 to read the right
   sector here.

 - With GPT, we can have 128 partitions.

 - If the bootfs property has ever been set on a pool
   it seems that it never goes away.  zpool won't allow
   you to add to the pool with the bootfs property set.
   However, if you clear the property back to default
   we end up getting 0 for the object number and read
   a bogus block pointer and fail to boot.

 - Fix some error printfs. The printf in the loader is
   only capable of c,s and u formats.

 - Teach printf how to display %llu

Reviewed by:	dfr, jhb
MFC after:	2 weeks
2009-10-23 18:44:53 +00:00
Doug Rabson
e1899ef6c8 Add support for booting from raidz1 and raidz2 pools. 2009-05-16 10:48:20 +00:00
Doug Rabson
786895f6ba Add definitions for ZFS pool version 13. 2008-11-21 09:10:35 +00:00
Doug Rabson
0d16312b46 Some zfsboot fixes from Norikatsu Shigemura:
1. zfsboot2 (boot2) doesn't %d (printf), so change %d to %u.
2. chase new zpool versioning as SPA_VERSION.
   Obtained from: sys/cddl/contrib/opensolaris/uts/common/sys/fs/zfs.h

Submitted by:	nork
2008-11-19 16:59:19 +00:00
Pawel Jakub Dawidek
1ba4a712dd Update ZFS from version 6 to 13 and bring some FreeBSD-specific changes.
This bring huge amount of changes, I'll enumerate only user-visible changes:

- Delegated Administration

	Allows regular users to perform ZFS operations, like file system
	creation, snapshot creation, etc.

- L2ARC

	Level 2 cache for ZFS - allows to use additional disks for cache.
	Huge performance improvements mostly for random read of mostly
	static content.

- slog

	Allow to use additional disks for ZFS Intent Log to speed up
	operations like fsync(2).

- vfs.zfs.super_owner

	Allows regular users to perform privileged operations on files stored
	on ZFS file systems owned by him. Very careful with this one.

- chflags(2)

	Not all the flags are supported. This still needs work.

- ZFSBoot

	Support to boot off of ZFS pool. Not finished, AFAIK.

	Submitted by:	dfr

- Snapshot properties

- New failure modes

	Before if write requested failed, system paniced. Now one
	can select from one of three failure modes:
	- panic - panic on write error
	- wait - wait for disk to reappear
	- continue - serve read requests if possible, block write requests

- Refquota, refreservation properties

	Just quota and reservation properties, but don't count space consumed
	by children file systems, clones and snapshots.

- Sparse volumes

	ZVOLs that don't reserve space in the pool.

- External attributes

	Compatible with extattr(2).

- NFSv4-ACLs

	Not sure about the status, might not be complete yet.

	Submitted by:	trasz

- Creation-time properties

- Regression tests for zpool(8) command.

Obtained from:	OpenSolaris
2008-11-17 20:49:29 +00:00