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* Fix indefinite articleGeLiXin2016-08-111-1/+1
| | | | | | | | | | | The indefinite article before nvlist should be "an", not "a". We have 27 "an nvlist" and 7 "a nvlist" in our comment, they should stay the same as we are such a strict filesystem. Signed-off-by: GeLiXin <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #4941
* OpenZFS 6314 - buffer overflow in dsl_dataset_nameIgor Kozhukhov2016-06-281-1/+5
| | | | | | | | | | | Reviewed by: George Wilson <[email protected]> Reviewed by: Prakash Surya <[email protected]> Reviewed by: Igor Kozhukhov <[email protected]> Approved by: Dan McDonald <[email protected]> Ported-by: Brian Behlendorf <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/6314 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/d6160ee
* Implement zfs_ioc_recv_new() for OpenZFS 2605Brian Behlendorf2016-06-281-1/+3
| | | | | | | | | | | | | | | Adds ZFS_IOC_RECV_NEW for resumable streams and preserves the legacy ZFS_IOC_RECV user/kernel interface. The new interface supports all stream options but is currently only used for resumable streams. This way updated user space utilities will interoperate with older kernel modules. ZFS_IOC_RECV_NEW is modeled after the existing ZFS_IOC_SEND_NEW handler. Non-Linux OpenZFS platforms have opted to change the legacy interface in an incompatible fashion instead of adding a new ioctl. Signed-off-by: Brian Behlendorf <[email protected]>
* OpenZFS 2605, 6980, 6902Matthew Ahrens2016-06-281-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 2605 want to resume interrupted zfs send Reviewed by: George Wilson <[email protected]> Reviewed by: Paul Dagnelie <[email protected]> Reviewed by: Richard Elling <[email protected]> Reviewed by: Xin Li <[email protected]> Reviewed by: Arne Jansen <[email protected]> Approved by: Dan McDonald <[email protected]> Ported-by: kernelOfTruth <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/2605 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/9c3fd12 6980 6902 causes zfs send to break due to 32-bit/64-bit struct mismatch Reviewed by: Paul Dagnelie <[email protected]> Reviewed by: George Wilson <[email protected]> Approved by: Robert Mustacchi <[email protected]> Ported by: Brian Behlendorf <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/6980 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/ea4a67f Porting notes: - All rsend and snapshop tests enabled and updated for Linux. - Fix misuse of input argument in traverse_visitbp(). - Fix ISO C90 warnings and errors. - Fix gcc 'missing braces around initializer' in 'struct send_thread_arg to_arg =' warning. - Replace 4 argument fletcher_4_native() with 3 argument version, this change was made in OpenZFS 4185 which has not been ported. - Part of the sections for 'zfs receive' and 'zfs send' was rewritten and reordered to approximate upstream. - Fix mktree xattr creation, 'user.' prefix required. - Minor fixes to newly enabled test cases - Long holds for volumes allowed during receive for minor registration.
* Implement large_dnode pool featureNed Bass2016-06-241-0/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Justification ------------- This feature adds support for variable length dnodes. Our motivation is to eliminate the overhead associated with using spill blocks. Spill blocks are used to store system attribute data (i.e. file metadata) that does not fit in the dnode's bonus buffer. By allowing a larger bonus buffer area the use of a spill block can be avoided. Spill blocks potentially incur an additional read I/O for every dnode in a dnode block. As a worst case example, reading 32 dnodes from a 16k dnode block and all of the spill blocks could issue 33 separate reads. Now suppose those dnodes have size 1024 and therefore don't need spill blocks. Then the worst case number of blocks read is reduced to from 33 to two--one per dnode block. In practice spill blocks may tend to be co-located on disk with the dnode blocks so the reduction in I/O would not be this drastic. In a badly fragmented pool, however, the improvement could be significant. ZFS-on-Linux systems that make heavy use of extended attributes would benefit from this feature. In particular, ZFS-on-Linux supports the xattr=sa dataset property which allows file extended attribute data to be stored in the dnode bonus buffer as an alternative to the traditional directory-based format. Workloads such as SELinux and the Lustre distributed filesystem often store enough xattr data to force spill bocks when xattr=sa is in effect. Large dnodes may therefore provide a performance benefit to such systems. Other use cases that may benefit from this feature include files with large ACLs and symbolic links with long target names. Furthermore, this feature may be desirable on other platforms in case future applications or features are developed that could make use of a larger bonus buffer area. Implementation -------------- The size of a dnode may be a multiple of 512 bytes up to the size of a dnode block (currently 16384 bytes). A dn_extra_slots field was added to the current on-disk dnode_phys_t structure to describe the size of the physical dnode on disk. The 8 bits for this field were taken from the zero filled dn_pad2 field. The field represents how many "extra" dnode_phys_t slots a dnode consumes in its dnode block. This convention results in a value of 0 for 512 byte dnodes which preserves on-disk format compatibility with older software. Similarly, the in-memory dnode_t structure has a new dn_num_slots field to represent the total number of dnode_phys_t slots consumed on disk. Thus dn->dn_num_slots is 1 greater than the corresponding dnp->dn_extra_slots. This difference in convention was adopted because, unlike on-disk structures, backward compatibility is not a concern for in-memory objects, so we used a more natural way to represent size for a dnode_t. The default size for newly created dnodes is determined by the value of a new "dnodesize" dataset property. By default the property is set to "legacy" which is compatible with older software. Setting the property to "auto" will allow the filesystem to choose the most suitable dnode size. Currently this just sets the default dnode size to 1k, but future code improvements could dynamically choose a size based on observed workload patterns. Dnodes of varying sizes can coexist within the same dataset and even within the same dnode block. For example, to enable automatically-sized dnodes, run # zfs set dnodesize=auto tank/fish The user can also specify literal values for the dnodesize property. These are currently limited to powers of two from 1k to 16k. The power-of-2 limitation is only for simplicity of the user interface. Internally the implementation can handle any multiple of 512 up to 16k, and consumers of the DMU API can specify any legal dnode value. The size of a new dnode is determined at object allocation time and stored as a new field in the znode in-memory structure. New DMU interfaces are added to allow the consumer to specify the dnode size that a newly allocated object should use. Existing interfaces are unchanged to avoid having to update every call site and to preserve compatibility with external consumers such as Lustre. The new interfaces names are given below. The versions of these functions that don't take a dnodesize parameter now just call the _dnsize() versions with a dnodesize of 0, which means use the legacy dnode size. New DMU interfaces: dmu_object_alloc_dnsize() dmu_object_claim_dnsize() dmu_object_reclaim_dnsize() New ZAP interfaces: zap_create_dnsize() zap_create_norm_dnsize() zap_create_flags_dnsize() zap_create_claim_norm_dnsize() zap_create_link_dnsize() The constant DN_MAX_BONUSLEN is renamed to DN_OLD_MAX_BONUSLEN. The spa_maxdnodesize() function should be used to determine the maximum bonus length for a pool. These are a few noteworthy changes to key functions: * The prototype for dnode_hold_impl() now takes a "slots" parameter. When the DNODE_MUST_BE_FREE flag is set, this parameter is used to ensure the hole at the specified object offset is large enough to hold the dnode being created. The slots parameter is also used to ensure a dnode does not span multiple dnode blocks. In both of these cases, if a failure occurs, ENOSPC is returned. Keep in mind, these failure cases are only possible when using DNODE_MUST_BE_FREE. If the DNODE_MUST_BE_ALLOCATED flag is set, "slots" must be 0. dnode_hold_impl() will check if the requested dnode is already consumed as an extra dnode slot by an large dnode, in which case it returns ENOENT. * The function dmu_object_alloc() advances to the next dnode block if dnode_hold_impl() returns an error for a requested object. This is because the beginning of the next dnode block is the only location it can safely assume to either be a hole or a valid starting point for a dnode. * dnode_next_offset_level() and other functions that iterate through dnode blocks may no longer use a simple array indexing scheme. These now use the current dnode's dn_num_slots field to advance to the next dnode in the block. This is to ensure we properly skip the current dnode's bonus area and don't interpret it as a valid dnode. zdb --- The zdb command was updated to display a dnode's size under the "dnsize" column when the object is dumped. For ZIL create log records, zdb will now display the slot count for the object. ztest ----- Ztest chooses a random dnodesize for every newly created object. The random distribution is more heavily weighted toward small dnodes to better simulate real-world datasets. Unused bonus buffer space is filled with non-zero values computed from the object number, dataset id, offset, and generation number. This helps ensure that the dnode traversal code properly skips the interior regions of large dnodes, and that these interior regions are not overwritten by data belonging to other dnodes. A new test visits each object in a dataset. It verifies that the actual dnode size matches what was stored in the ztest block tag when it was created. It also verifies that the unused bonus buffer space is filled with the expected data patterns. ZFS Test Suite -------------- Added six new large dnode-specific tests, and integrated the dnodesize property into existing tests for zfs allow and send/recv. Send/Receive ------------ ZFS send streams for datasets containing large dnodes cannot be received on pools that don't support the large_dnode feature. A send stream with large dnodes sets a DMU_BACKUP_FEATURE_LARGE_DNODE flag which will be unrecognized by an incompatible receiving pool so that the zfs receive will fail gracefully. While not implemented here, it may be possible to generate a backward-compatible send stream from a dataset containing large dnodes. The implementation may be tricky, however, because the send object record for a large dnode would need to be resized to a 512 byte dnode, possibly kicking in a spill block in the process. This means we would need to construct a new SA layout and possibly register it in the SA layout object. The SA layout is normally just sent as an ordinary object record. But if we are constructing new layouts while generating the send stream we'd have to build the SA layout object dynamically and send it at the end of the stream. For sending and receiving between pools that do support large dnodes, the drr_object send record type is extended with a new field to store the dnode slot count. This field was repurposed from unused padding in the structure. ZIL Replay ---------- The dnode slot count is stored in the uppermost 8 bits of the lr_foid field. The bits were unused as the object id is currently capped at 48 bits. Resizing Dnodes --------------- It should be possible to resize a dnode when it is dirtied if the current dnodesize dataset property differs from the dnode's size, but this functionality is not currently implemented. Clearly a dnode can only grow if there are sufficient contiguous unused slots in the dnode block, but it should always be possible to shrink a dnode. Growing dnodes may be useful to reduce fragmentation in a pool with many spill blocks in use. Shrinking dnodes may be useful to allow sending a dataset to a pool that doesn't support the large_dnode feature. Feature Reference Counting -------------------------- The reference count for the large_dnode pool feature tracks the number of datasets that have ever contained a dnode of size larger than 512 bytes. The first time a large dnode is created in a dataset the dataset is converted to an extensible dataset. This is a one-way operation and the only way to decrement the feature count is to destroy the dataset, even if the dataset no longer contains any large dnodes. The complexity of reference counting on a per-dnode basis was too high, so we chose to track it on a per-dataset basis similarly to the large_block feature. Signed-off-by: Ned Bass <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #3542
* Add request size histograms (-r) to zpool iostat, minor man page fixTony Hutter2016-05-251-7/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add -r option to "zpool iostat" to print request size histograms for the leaf ZIOs. This includes histograms of individual ZIOs ("ind") and aggregate ZIOs ("agg"). These stats can be useful for seeing how well the ZFS IO aggregator is working. $ zpool iostat -r mypool sync_read sync_write async_read async_write scrub req_size ind agg ind agg ind agg ind agg ind agg ---------- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- 512 0 0 0 0 0 0 530 0 0 0 1K 0 0 260 0 0 0 116 246 0 0 2K 0 0 0 0 0 0 0 431 0 0 4K 0 0 0 0 0 0 3 107 0 0 8K 15 0 35 0 0 0 0 6 0 0 16K 0 0 0 0 0 0 0 39 0 0 32K 0 0 0 0 0 0 0 0 0 0 64K 20 0 40 0 0 0 0 0 0 0 128K 0 0 20 0 0 0 0 0 0 0 256K 0 0 0 0 0 0 0 0 0 0 512K 0 0 0 0 0 0 0 0 0 0 1M 0 0 0 0 0 0 0 0 0 0 2M 0 0 0 0 0 0 0 0 0 0 4M 0 0 0 0 0 0 155 19 0 0 8M 0 0 0 0 0 0 0 811 0 0 16M 0 0 0 0 0 0 0 68 0 0 -------------------------------------------------------------------------------- Also rename the stray "-G" in the man page to be "-w" for latency histograms. Signed-off-by: Tony Hutter <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Signed-off-by: Tim Chase <[email protected]> Closes #4659
* Add -lhHpw options to "zpool iostat" for avg latency, histograms, & queuesTony Hutter2016-05-121-0/+73
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Update the zfs module to collect statistics on average latencies, queue sizes, and keep an internal histogram of all IO latencies. Along with this, update "zpool iostat" with some new options to print out the stats: -l: Include average IO latencies stats: total_wait disk_wait syncq_wait asyncq_wait scrub read write read write read write read write wait ----- ----- ----- ----- ----- ----- ----- ----- ----- - 41ms - 2ms - 46ms - 4ms - - 5ms - 1ms - 1us - 4ms - - 5ms - 1ms - 1us - 4ms - - - - - - - - - - - 49ms - 2ms - 47ms - - - - - - - - - - - - - 2ms - 1ms - - - 1ms - ----- ----- ----- ----- ----- ----- ----- ----- ----- 1ms 1ms 1ms 413us 16us 25us - 5ms - 1ms 1ms 1ms 413us 16us 25us - 5ms - 2ms 1ms 2ms 412us 26us 25us - 5ms - - 1ms - 413us - 25us - 5ms - - 1ms - 460us - 29us - 5ms - 196us 1ms 196us 370us 7us 23us - 5ms - ----- ----- ----- ----- ----- ----- ----- ----- ----- -w: Print out latency histograms: sdb total disk sync_queue async_queue latency read write read write read write read write scrub ------- ------ ------ ------ ------ ------ ------ ------ ------ ------ 1ns 0 0 0 0 0 0 0 0 0 ... 33us 0 0 0 0 0 0 0 0 0 66us 0 0 107 2486 2 788 12 12 0 131us 2 797 359 4499 10 558 184 184 6 262us 22 801 264 1563 10 286 287 287 24 524us 87 575 71 52086 15 1063 136 136 92 1ms 152 1190 5 41292 4 1693 252 252 141 2ms 245 2018 0 50007 0 2322 371 371 220 4ms 189 7455 22 162957 0 3912 6726 6726 199 8ms 108 9461 0 102320 0 5775 2526 2526 86 17ms 23 11287 0 37142 0 8043 1813 1813 19 34ms 0 14725 0 24015 0 11732 3071 3071 0 67ms 0 23597 0 7914 0 18113 5025 5025 0 134ms 0 33798 0 254 0 25755 7326 7326 0 268ms 0 51780 0 12 0 41593 10002 10002 0 537ms 0 77808 0 0 0 64255 13120 13120 0 1s 0 105281 0 0 0 83805 20841 20841 0 2s 0 88248 0 0 0 73772 14006 14006 0 4s 0 47266 0 0 0 29783 17176 17176 0 9s 0 10460 0 0 0 4130 6295 6295 0 17s 0 0 0 0 0 0 0 0 0 34s 0 0 0 0 0 0 0 0 0 69s 0 0 0 0 0 0 0 0 0 137s 0 0 0 0 0 0 0 0 0 ------------------------------------------------------------------------------- -h: Help -H: Scripted mode. Do not display headers, and separate fields by a single tab instead of arbitrary space. -q: Include current number of entries in sync & async read/write queues, and scrub queue: syncq_read syncq_write asyncq_read asyncq_write scrubq_read pend activ pend activ pend activ pend activ pend activ ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- 0 0 0 0 78 29 0 0 0 0 0 0 0 0 78 29 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - - - - - - - - - - 0 0 0 0 0 0 0 0 0 0 - - - - - - - - - - 0 0 0 0 0 0 0 0 0 0 ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- 0 0 227 394 0 19 0 0 0 0 0 0 227 394 0 19 0 0 0 0 0 0 108 98 0 19 0 0 0 0 0 0 19 98 0 0 0 0 0 0 0 0 78 98 0 0 0 0 0 0 0 0 19 88 0 0 0 0 0 0 ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- -p: Display numbers in parseable (exact) values. Also, update iostat syntax to allow the user to specify specific vdevs to show statistics for. The three options for choosing pools/vdevs are: Display a list of pools: zpool iostat ... [pool ...] Display a list of vdevs from a specific pool: zpool iostat ... [pool vdev ...] Display a list of vdevs from any pools: zpool iostat ... [vdev ...] Lastly, allow zpool command "interval" value to be floating point: zpool iostat -v 0.5 Signed-off-by: Tony Hutter <[email protected] Signed-off-by: Brian Behlendorf <[email protected]> Closes #4433
* OpenZFS 6736 - ZFS per-vdev ZAPsJoe Stein2016-05-021-0/+3
| | | | | | | | | | | | | | | | | 6736 ZFS per-vdev ZAPs Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: John Kennedy <[email protected]> Reviewed by: George Wilson <[email protected]> Reviewed by: Don Brady <[email protected]> Reviewed by: Dan McDonald <[email protected]> References: https://www.illumos.org/issues/6736 https://github.com/openzfs/openzfs/commit/215198a Ported-by: Don Brady <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #4515
* Illumos 4929 - want prevsnap propertyMatthew Ahrens2016-01-111-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | 4929 want prevsnap property Reviewed by: Adam Leventhal <[email protected]> Reviewed by: Matt Amdur <[email protected]> Reviewed by: Saso Kiselkov <[email protected]> Reviewed by: Boris Protopopov <[email protected]> Reviewed by: Richard Lowe <[email protected]> Approved by: Dan McDonald <[email protected]> References: https://www.illumos.org/issues/4929 https://github.com/illumos/illumos-gate/commit/b461c74 Porting notes: - [include/sys/fs/zfs.h] - f67d70 Create an 'overlay' property - 11b9ec Add full SELinux support - [fs/zfs/dsl_dataset.c] - This increases the stack size of dsl_dataset_stats() but nothing has been changed until this is shown to be an issue. Ported-by: kernelOfTruth [email protected] Signed-off-by: Brian Behlendorf <[email protected]>
* Illumos 5027 - zfs large block supportMatthew Ahrens2015-05-111-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 5027 zfs large block support Reviewed by: Alek Pinchuk <[email protected]> Reviewed by: George Wilson <[email protected]> Reviewed by: Josef 'Jeff' Sipek <[email protected]> Reviewed by: Richard Elling <[email protected]> Reviewed by: Saso Kiselkov <[email protected]> Reviewed by: Brian Behlendorf <[email protected]> Approved by: Dan McDonald <[email protected]> References: https://www.illumos.org/issues/5027 https://github.com/illumos/illumos-gate/commit/b515258 Porting Notes: * Included in this patch is a tiny ISP2() cleanup in zio_init() from Illumos 5255. * Unlike the upstream Illumos commit this patch does not impose an arbitrary 128K block size limit on volumes. Volumes, like filesystems, are limited by the zfs_max_recordsize=1M module option. * By default the maximum record size is limited to 1M by the module option zfs_max_recordsize. This value may be safely increased up to 16M which is the largest block size supported by the on-disk format. At the moment, 1M blocks clearly offer a significant performance improvement but the benefits of going beyond this for the majority of workloads are less clear. * The illumos version of this patch increased DMU_MAX_ACCESS to 32M. This was determined not to be large enough when using 16M blocks because the zfs_make_xattrdir() function will fail (EFBIG) when assigning a TX. This was immediately observed under Linux because all newly created files must have a security xattr created and that was failing. Therefore, we've set DMU_MAX_ACCESS to 64M. * On 32-bit platforms a hard limit of 1M is set for blocks due to the limited virtual address space. We should be able to relax this one the ABD patches are merged. Ported-by: Brian Behlendorf <[email protected]> Closes #354
* Illumos 3897 - zfs filesystem and snapshot limitsJerry Jelinek2015-04-281-1/+5
| | | | | | | | | | | | | | | | | | 3897 zfs filesystem and snapshot limits Author: Jerry Jelinek <[email protected]> Reviewed by: Matthew Ahrens <[email protected]> Approved by: Christopher Siden <[email protected]> References: https://www.illumos.org/issues/3897 https://github.com/illumos/illumos-gate/commit/a2afb61 Porting Notes: dsl_dataset_snapshot_check(): reduce stack usage using kmem_alloc(). Ported-by: Chris Dunlop <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]>
* Kernel header installation should respect --prefixRichard Yao2014-10-281-1/+1
| | | | | | | | | | This is the upstream component of work that enables preliminary support for building Gentoo's ZFS packaging on other Linux systems via Gentoo Prefix. Signed-off-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #2641
* Implement -t option to zpool create for temporary pool namesRichard Yao2014-09-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | Creating virtual machines that have their rootfs on ZFS on hosts that have their rootfs on ZFS causes SPA namespace collisions when the standard name rpool is used. The solution is either to give each guest pool a name unique to the host, which is not always desireable, or boot a VM environment containing an ISO image to install it, which is cumbersome. 26b42f3f9d03f85cc7966dc2fe4dfe9216601b0e introduced `zpool import -t ...` to simplify situations where a host must access a guest's pool when there is a SPA namespace conflict. We build upon that to introduce `zpool import -t tname ...`. That allows us to create a pool whose in-core name is tname, but whose on-disk name is the normal name specified. This simplifies the creation of machine images that use a rootfs on ZFS. That benefits not only real world deployments, but also ZFSOnLinux development by decreasing the time needed to perform rootfs on ZFS experiments. Signed-off-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #2417
* Illumos 4976-4984 - metaslab improvementsGeorge Wilson2014-08-181-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 4976 zfs should only avoid writing to a failing non-redundant top-level vdev 4978 ztest fails in get_metaslab_refcount() 4979 extend free space histogram to device and pool 4980 metaslabs should have a fragmentation metric 4981 remove fragmented ops vector from block allocator 4982 space_map object should proactively upgrade when feature is enabled 4983 need to collect metaslab information via mdb 4984 device selection should use fragmentation metric Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: Adam Leventhal <[email protected]> Reviewed by: Christopher Siden <[email protected]> Approved by: Garrett D'Amore <[email protected]> References: https://www.illumos.org/issues/4976 https://www.illumos.org/issues/4978 https://www.illumos.org/issues/4979 https://www.illumos.org/issues/4980 https://www.illumos.org/issues/4981 https://www.illumos.org/issues/4982 https://www.illumos.org/issues/4983 https://www.illumos.org/issues/4984 https://github.com/illumos/illumos-gate/commit/2e4c998 Notes: The "zdb -M" option has been re-tasked to display the new metaslab fragmentation metric and the new "zdb -I" option is used to control the maximum number of in-flight I/Os. The new fragmentation metric is derived from the space map histogram which has been rolled up to the vdev and pool level and is presented to the user via "zpool list". Add a number of module parameters related to the new metaslab weighting logic. Ported by: Tim Chase <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #2595
* Create an 'overlay' propertyTurbo Fredriksson2014-08-151-0/+1
| | | | | | | | | | | | | | | Add a new 'overlay' property (default 'off') that controls whether the filesystem should be mounted even if the mountpoint is busy or if it should fail with a 'mountpoint not empty'. Doing overlay mounts is the default mount behavior on Linux, but not in ZFS. It have been decided that following the ZFS behavior should be the default, but this overlay allows for site administrator to override this decision on a per-dataset basis. Signed-off-by: Turbo Fredriksson <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes: #2503
* Illumos 4390 - I/O errors can corrupt space map when deleting fs/volMatthew Ahrens2014-08-041-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 4390 i/o errors when deleting filesystem/zvol can lead to space map corruption Reviewed by: George Wilson <[email protected]> Reviewed by: Christopher Siden <[email protected]> Reviewed by: Adam Leventhal <[email protected]> Reviewed by: Dan McDonald <[email protected]> Reviewed by: Saso Kiselkov <[email protected]> Approved by: Dan McDonald <[email protected]> References: https://www.illumos.org/issues/4390 https://github.com/illumos/illumos-gate/commit/7fd05ac Porting notes: Previous stack-reduction efforts in traverse_visitb() caused a fair number of un-mergable pieces of code. This patch should reduce its stack footprint a bit more. The new local bptree_entry_phys_t in bptree_add() is dynamically-allocated using kmem_zalloc() for the purpose of stack reduction. The new global zfs_free_leak_on_eio has been defined as an integer rather than a boolean_t as was the case with the related zfs_recover global. Also, zfs_free_leak_on_eio's definition has been inserted into zfs_debug.c for consistency with the existing definition of zfs_recover. Illumos placed it in spa_misc.c. Ported by: Tim Chase <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #2545
* Illumos 3835 zfs need not store 2 copies of all metadataMatthew Ahrens2014-07-311-1/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Reviewed by: George Wilson <[email protected]> Reviewed by: Adam Leventhal <[email protected]> Reviewed by: Dan McDonald <[email protected]> Approved by: Richard Lowe <[email protected]> Description from Matt Ahrens's bug report at Delphix: Add a new zfs property, "redundant_metadata" which can have values "all" or "most". The default will be "all", which is the current behavior. Setting to "most" will cause us to only store 1 copy of level-1 indirect blocks of user data files. Additional notes: The new man page section for this property states "The exact behavior of which metadata blocks are stored redundantly may change in future releases." and: "When set to most, ZFS stores an extra copy of most types of metadata. This can improve performance of random writes, because less metadata must be written." The current implementation is as described above in Matt's blog. It is controlled by a new global integer "zfs_redundant_metadata_most_ditto_level", currently initialized to 2. When "redundant_metadata" is set to "most", only indirect blocks of the specified level and higher will have additional ditto blocks created. Ported by: Tim Chase <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #2542
* Illumos 4368, 4369.Matthew Ahrens2014-07-291-5/+9
| | | | | | | | | | | | | | | | | 4369 implement zfs bookmarks 4368 zfs send filesystems from readonly pools Reviewed by: Christopher Siden <[email protected]> Reviewed by: George Wilson <[email protected]> Approved by: Garrett D'Amore <[email protected]> References: https://www.illumos.org/issues/4369 https://www.illumos.org/issues/4368 https://github.com/illumos/illumos-gate/commit/78f1710 Ported by: Tim Chase <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #2530
* Check the dataset type more rigorously when fetching properties.Tim Chase2014-05-061-1/+1
| | | | | | | | | | | | | | | | | | | | | | When fetching property values of snapshots, a check against the head dataset type must be performed. Previously, this additional check was performed only when fetching "version", "normalize", "utf8only" or "case". This caused the ZPL properties "acltype", "exec", "devices", "nbmand", "setuid" and "xattr" to be erroneously displayed with meaningless values for snapshots of volumes. It also did not allow for the display of "volsize" of a snapshot of a volume. This patch adds the headcheck flag paramater to zfs_prop_valid_for_type() and zprop_valid_for_type() to indicate the check is being done against a head dataset's type in order that properties valid only for snapshots are handled correctly. This allows the the head check in get_numeric_property() to be performed when fetching a property for a snapshot. Signed-off-by: Tim Chase <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #2265
* Add zpool_events_seek() functionalityBrian Behlendorf2014-03-311-0/+1
| | | | | | | | | | | | | The ZFS_IOC_EVENTS_SEEK ioctl was added to allow user space callers to seek around the zevent file descriptor by EID. When a specific EID is passed and it exists the cursor will be positioned there. If the EID is no longer cached by the kernel ENOENT is returned. The caller may also pass ZEVENT_SEEK_START or ZEVENT_SEEK_END to seek to those respective locations. Signed-off-by: Brian Behlendorf <[email protected]> Signed-off-by: Chris Dunlap <[email protected]> Issue #2
* Implement -t option to zpool import for temporary pool namesRichard Yao2014-03-201-0/+1
| | | | | | | | | | | | | | | | Originally, users had to handle spa namespace collisions by either exporting the already imported pool or by specifying a new name for the pool with a conflicting name. In the case of root pools from virtual guests, neither approach to collision resolution is reasonable. This is addressed by extending the new name syntax with a -t option to specify that the new name is temporary. When specified, this sets an internal flag that is passed into the kernel to tell it that all label updates should refer to the name used in the original label. Consequently, the original pool name will be retained on export. Signed-off-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #2189
* Add erratum for issue #2094Richard Yao2014-02-211-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ZoL commit 1421c89 unintentionally changed the disk format in a forward- compatible, but not backward compatible way. This was accomplished by adding an entry to zbookmark_t, which is included in a couple of on-disk structures. That lead to the creation of pools with incorrect dsl_scan_phys_t objects that could only be imported by versions of ZoL containing that commit. Such pools cannot be imported by other versions of ZFS or past versions of ZoL. The additional field has been removed by the previous commit. However, affected pools must be imported and scrubbed using a version of ZoL with this commit applied. This will return the pools to a state in which they may be imported by other implementations. The 'zpool import' or 'zpool status' command can be used to determine if a pool is impacted. A message similar to one of the following means your pool must be scrubbed to restore compatibility. $ zpool import pool: zol-0.6.2-173 id: 1165955789558693437 state: ONLINE status: Errata #1 detected. action: The pool can be imported using its name or numeric identifier, however there is a compatibility issue which should be corrected by running 'zpool scrub' see: http://zfsonlinux.org/msg/ZFS-8000-ER config: ... $ zpool status pool: zol-0.6.2-173 state: ONLINE scan: pool compatibility issue detected. see: https://github.com/zfsonlinux/zfs/issues/2094 action: To correct the issue run 'zpool scrub'. config: ... If there was an async destroy in progress 'zpool import' will prevent the pool from being imported. Further advice on how to proceed will be provided by the error message as follows. $ zpool import pool: zol-0.6.2-173 id: 1165955789558693437 state: ONLINE status: Errata #2 detected. action: The pool can not be imported with this version of ZFS due to an active asynchronous destroy. Revert to an earlier version and allow the destroy to complete before updating. see: http://zfsonlinux.org/msg/ZFS-8000-ER config: ... Pools affected by the damaged dsl_scan_phys_t can be detected prior to an upgrade by running the following command as root: zdb -dddd poolname 1 | grep -P '^\t\tscan = ' | sed -e 's;scan = ;;' | wc -w Note that `poolname` must be replaced with the name of the pool you wish to check. A value of 25 indicates the dsl_scan_phys_t has been damaged. A value of 24 indicates that the dsl_scan_phys_t is normal. A value of 0 indicates that there has never been a scrub run on the pool. The regression caused by the change to zbookmark_t never made it into a tagged release, Gentoo backports, Ubuntu, Debian, Fedora, or EPEL stable respositorys. Only those using the HEAD version directly from Github after the 0.6.2 but before the 0.6.3 tag are affected. This patch does have one limitation that should be mentioned. It will not detect errata #2 on a pool unless errata #1 is also present. It expected this will not be a significant problem because pools impacted by errata #2 have a high probably of being impacted by errata #1. End users can ensure they do no hit this unlikely case by waiting for all asynchronous destroy operations to complete before updating ZoL. The presence of any background destroys on any imported pools can be checked by running `zpool get freeing` as root. This will display a non-zero value for any pool with an active asynchronous destroy. Lastly, it is expected that no user data has been lost as a result of this erratum. Original-patch-by: Tim Chase <[email protected]> Reworked-by: Brian Behlendorf <[email protected]> Signed-off-by: Tim Chase <[email protected]> Signed-off-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #2094
* Add generic errata infrastructureBrian Behlendorf2014-02-211-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | From time to time it may be necessary to inform the pool administrator about an errata which impacts their pool. These errata will by shown to the administrator through the 'zpool status' and 'zpool import' output as appropriate. The errata must clearly describe the issue detected, how the pool is impacted, and what action should be taken to resolve the situation. Additional information for each errata will be provided at http://zfsonlinux.org/msg/ZFS-8000-ER. To accomplish the above this patch adds the required infrastructure to allow the kernel modules to notify the utilities that an errata has been detected. This is done through the ZPOOL_CONFIG_ERRATA uint64_t which has been added to the pool configuration nvlist. To add a new errata the following changes must be made: * A new errata identifier must be assigned by adding a new enum value to the zpool_errata_t type. New enums must be added to the end to preserve the existing ordering. * Code must be added to detect the issue. This does not strictly need to be done at pool import time but doing so will make the errata visible in 'zpool import' as well as 'zpool status'. Once detected the spa->spa_errata member should be set to the new enum. * If possible code should be added to clear the spa->spa_errata member once the errata has been resolved. * The show_import() and status_callback() functions must be updated to include an informational message describing the errata. This should include an action message describing what an administrator should do to address the errata. * The documentation at http://zfsonlinux.org/msg/ZFS-8000-ER must be updated to describe the errata. This space can be used to provide as much additional information as needed to fully describe the errata. A link to this documentation will be automatically generated in the output of 'zpool import' and 'zpool status'. Original-idea-by: Tim Chase <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Signed-off-by: Tim Chase <[email protected]> Signed-off-by: Richard Yao <[email protected] Issue #2094
* Implement relatime.Tim Chase2014-01-291-0/+1
| | | | | | | | | | | | Add the "relatime" property. When set to "on", a file's atime will only be updated if the existing atime at least a day old or if the existing ctime or mtime has been updated since the last access. This behavior is compatible with the Linux "relatime" mount option. Signed-off-by: Tim Chase <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #2064 Closes #1917
* Add full SELinux supportMatthew Thode2013-12-191-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Four new dataset properties have been added to support SELinux. They are 'context', 'fscontext', 'defcontext' and 'rootcontext' which map directly to the context options described in mount(8). When one of these properties is set to something other than 'none'. That string will be passed verbatim as a mount option for the given context when the filesystem is mounted. For example, if you wanted the rootcontext for a filesystem to be set to 'system_u:object_r:fs_t' you would set the property as follows: $ zfs set rootcontext="system_u:object_r:fs_t" storage-pool/media This will ensure the filesystem is automatically mounted with that rootcontext. It is equivalent to manually specifying the rootcontext with the -o option like this: $ zfs mount -o rootcontext=system_u:object_r:fs_t storage-pool/media By default all four contexts are set to 'none'. Further information on SELinux contexts is detailed in mount(8) and selinux(8) man pages. Signed-off-by: Matthew Thode <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Signed-off-by: Richard Yao <[email protected]> Closes #1504
* cstyle: Resolve C style issuesMichael Kjorling2013-12-181-1/+1
| | | | | | | | | | | | | | | | | | The vast majority of these changes are in Linux specific code. They are the result of not having an automated style checker to validate the code when it was originally written. Others were caused when the common code was slightly adjusted for Linux. This patch contains no functional changes. It only refreshes the code to conform to style guide. Everyone submitting patches for inclusion upstream should now run 'make checkstyle' and resolve any warning prior to opening a pull request. The automated builders have been updated to fail a build if when 'make checkstyle' detects an issue. Signed-off-by: Brian Behlendorf <[email protected]> Closes #1821
* Sync /dev/zfs ioctl orderingBrian Behlendorf2013-12-161-4/+18
| | | | | | | | | | | | | | | | | | | | | | In order to minimize any future disruption caused by the addition and removal /dev/zfs ioctls this patch makes the following changes. 1) Sync ZoL's ioctl ordering such that it matches Illumos. For historic reasons the ZFS_IOC_DESTROY_SNAPS and ZFS_IOC_POOL_REGUID ioctls were out of order. 2) Move Linux and FreeBSD specific ioctls in to their own reserved ranges. This allows us to preserve the existing ordering when new ioctls are added by either Illumos or FreeBSD. When an ioctl is no longer needed it should be retired in place. This change alters the ZFS user/kernel ABI so make sure you rebuild both your user and kernel modules. However, it should allow for a much stabler interface going forward. Signed-off-by: Brian Behlendorf <[email protected]> Signed-off-by: Ned Bass <[email protected]> Closes #1973
* Remove ZFC_IOC_*_MINOR ioctl()sBrian Behlendorf2013-12-161-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Early versions of ZFS coordinated the creation and destruction of device minors from userspace. This was inherently racy and in late 2009 these ioctl()s were removed leaving everything up to the kernel. This significantly simplified the code. However, we never picked up these changes in ZoL since we'd already significantly adjusted this code for Linux. This patch aims to rectify that by finally removing ZFC_IOC_*_MINOR ioctl()s and moving all the functionality down in to the kernel. Since this cleanup will change the kernel/user ABI it's being done in the same tag as the previous libzfs_core ABI changes. This will minimize, but not eliminate, the disruption to end users. Once merged ZoL, Illumos, and FreeBSD will basically be back in sync in regards to handling ZVOLs in the common code. While each platform must have its own custom zvol.c implemenation the interfaces provided are consistent. NOTES: 1) This patch introduces one subtle change in behavior which could not be easily avoided. Prior to this change callers of 'zfs create -V ...' were guaranteed that upon exit the /dev/zvol/ block device link would be created or an error returned. That's no longer the case. The utilities will no longer block waiting for the symlink to be created. Callers are now responsible for blocking, this is why a 'udev_wait' call was added to the 'label' function in scripts/common.sh. 2) The read-only behavior of a ZVOL now solely depends on if the ZVOL_RDONLY bit is set in zv->zv_flags. The redundant policy setting in the gendisk structure was removed. This both simplifies the code and allows us to safely leverage set_disk_ro() to issue a KOBJ_CHANGE uevent. See the comment in the code for futher details on this. 3) Because __zvol_create_minor() and zvol_alloc() may now be called in a sync task they must use KM_PUSHPAGE. References: illumos/illumos-gate@681d9761e8516a7dc5ab6589e2dfe717777e1123 Signed-off-by: Brian Behlendorf <[email protected]> Signed-off-by: Ned Bass <[email protected]> Signed-off-by: Tim Chase <[email protected]> Closes #1969
* Illumos #3956, #3957, #3958, #3959, #3960, #3961, #3962George Wilson2013-11-051-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 3956 ::vdev -r should work with pipelines 3957 ztest should update the cachefile before killing itself 3958 multiple scans can lead to partial resilvering 3959 ddt entries are not always resilvered 3960 dsl_scan can skip over dedup-ed blocks if physical birth != logical birth 3961 freed gang blocks are not resilvered and can cause pool to suspend 3962 ztest should print out zfs debug buffer before exiting Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: Adam Leventhal <[email protected]> Approved by: Richard Lowe <[email protected]> References: https://www.illumos.org/issues/3956 https://www.illumos.org/issues/3957 https://www.illumos.org/issues/3958 https://www.illumos.org/issues/3959 https://www.illumos.org/issues/3960 https://www.illumos.org/issues/3961 https://www.illumos.org/issues/3962 illumos/illumos-gate@b4952e17e8858d3225793b28788278de9fe6038d Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Porting notes: 1. zfs_dbgmsg_print() is only used in userland. Since we do not have mdb on Linux, it does not make sense to make it available in the kernel. This means that a build failure will occur if any future kernel patch depends on it. However, that is unlikely given that this functionality was added to support zdb. 2. zfs_dbgmsg_print() is only invoked for -VVV or greater log levels. This preserves the existing behavior of minimal noise when running with -V, and -VV. 3. In vdev_config_generate() the call to nvlist_alloc() was not changed to fnvlist_alloc() because we must pass KM_PUSHPAGE in the txg_sync context.
* Illumos #3894Keith M Wesolowski2013-11-041-0/+1
| | | | | | | | | | | | | | 3894 zfs should not allow snapshot of inconsistent dataset Reviewed by: Matthew Ahrens <[email protected]> Approved by: Gordon Ross <[email protected]> References: https://www.illumos.org/issues/3894 illumos/illumos-gate@ca48f36f20f6098ceb19d5b084b6b3d4b8eca9fa Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #1775
* Illumos #3588Matthew Ahrens2013-10-311-0/+2
| | | | | | | | | | | | | | | | | 3588 provide zfs properties for logical (uncompressed) space used and referenced Reviewed by: Adam Leventhal <[email protected]> Reviewed by: George Wilson <[email protected]> Reviewed by: Dan McDonald <[email protected]> Reviewed by: Richard Elling <[email protected]> Approved by: Richard Lowe <[email protected]> References: https://www.illumos.org/issues/3588 illumos/illumos-gate@77372cb0f35e8d3615ca2e16044f033397e88e21 Ported-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]>
* Posix ACL SupportMassimo Maggi2013-10-291-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | This change adds support for Posix ACLs by storing them as an xattr which is common practice for many Linux file systems. Since the Posix ACL is stored as an xattr it will not overwrite any existing ZFS/NFSv4 ACLs which may have been set. The Posix ACL will also be non-functional on other platforms although it may be visible as an xattr if that platform understands SA based xattrs. By default Posix ACLs are disabled but they may be enabled with the new 'aclmode=noacl|posixacl' property. Set the property to 'posixacl' to enable them. If ZFS/NFSv4 ACL support is ever added an appropriate acltype will be added. This change passes the POSIX Test Suite cleanly with the exception of xacl/00.t test 45 which is incorrect for Linux (Ext4 fails too). http://www.tuxera.com/community/posix-test-suite/ Signed-off-by: Massimo Maggi <[email protected]> Signed-off-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #170
* Illumos #2882, #2883, #2900Matthew Ahrens2013-09-041-55/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 2882 implement libzfs_core 2883 changing "canmount" property to "on" should not always remount dataset 2900 "zfs snapshot" should be able to create multiple, arbitrary snapshots at once Reviewed by: George Wilson <[email protected]> Reviewed by: Chris Siden <[email protected]> Reviewed by: Garrett D'Amore <[email protected]> Reviewed by: Bill Pijewski <[email protected]> Reviewed by: Dan Kruchinin <[email protected]> Approved by: Eric Schrock <[email protected]> References: https://www.illumos.org/issues/2882 https://www.illumos.org/issues/2883 https://www.illumos.org/issues/2900 illumos/illumos-gate@4445fffbbb1ea25fd0e9ea68b9380dd7a6709025 Ported-by: Tim Chase <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #1293 Porting notes: WARNING: This patch changes the user/kernel ABI. That means that the zfs/zpool utilities built from master are NOT compatible with the 0.6.2 kernel modules. Ensure you load the matching kernel modules from master after updating the utilities. Otherwise the zfs/zpool commands will be unable to interact with your pool and you will see errors similar to the following: $ zpool list failed to read pool configuration: bad address no pools available $ zfs list no datasets available Add zvol minor device creation to the new zfs_snapshot_nvl function. Remove the logging of the "release" operation in dsl_dataset_user_release_sync(). The logging caused a null dereference because ds->ds_dir is zeroed in dsl_dataset_destroy_sync() and the logging functions try to get the ds name via the dsl_dataset_name() function. I've got no idea why this particular code would have worked in Illumos. This code has subsequently been completely reworked in Illumos commit 3b2aab1 (3464 zfs synctask code needs restructuring). Squash some "may be used uninitialized" warning/erorrs. Fix some printf format warnings for %lld and %llu. Apply a few spa_writeable() changes that were made to Illumos in illumos/illumos-gate.git@cd1c8b8 as part of the 3112, 3113, 3114 and 3115 fixes. Add a missing call to fnvlist_free(nvl) in log_internal() that was added in Illumos to fix issue 3085 but couldn't be ported to ZoL at the time (zfsonlinux/zfs@9e11c73) because it depended on future work.
* Fix the comment in zfs.hShen Yan2013-07-091-2/+2
| | | | | | | The path to code is also changed in zfsonlinux. Signed-off-by: Brian Behlendorf <[email protected]> Issues #1566
* Change zfs-kmod-devel install pathBrian Behlendorf2013-03-131-1/+1
| | | | | | | | | | | | | | | Install the common zfs kernel development headers under /usr/src/zfs-<version>/ rather than in a kernel specific directory. The kernel specific build products such as zfs_config.h and Modules.symvers are left installed under /usr/src/zfs-<version>/<kernel>. This was done to be consistent with where dkms expects kernel module source to be packaged. It also allows for a common zfs-kmod-devel package which includes the headers, and per-kernel zfs-kmod-devel-<kernel> packages. Signed-off-by: Brian Behlendorf <[email protected]>
* Add snapdev=[hidden|visible] dataset propertyEric Dillmann2013-03-051-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The new snapdev dataset property may be set to control the visibility of zvol snapshot devices. By default this value is set to 'hidden' which will prevent zvol snapshots from appearing under /dev/zvol/ and /dev/<dataset>/. When set to 'visible' all zvol snapshots for the dataset will be visible. This functionality was largely added because when automatic snapshoting is enabled large numbers of read-only zvol snapshots will be created. When creating these devices the kernel will attempt to read their partition tables, and blkid will attempt to identify any filesystems on those partitions. This leads to a variety of issues: 1) The zvol partition tables will be read in the context of the `modprobe zfs` for automatically imported pools. This is undesirable and should be done asynchronously, but for now reducing the number of visible devices helps. 2) Udev expects to be able to complete its work for a new block devices fairly quickly. When many zvol devices are added at the same time this is no longer be true. It can lead to udev timeouts and missing /dev/zvol links. 3) Simply having lots of devices in /dev/ can be aukward from a management standpoint. Hidding the devices your unlikely to ever use helps with this. Any snapshot device which is needed can be made visible by changing the snapdev property. NOTE: This patch changes the default behavior for zvols which was effectively 'snapdev=visible'. Signed-off-by: Brian Behlendorf <[email protected]> Closes #1235 Closes #945 Issue #956 Issue #756
* Illumos #2762: zpool command should have better support for feature flagsChristopher Siden2013-01-081-0/+1
| | | | | | | | | | | | | 2762 zpool command should have better support for feature flags Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: George Wilson <[email protected]> Approved by: Eric Schrock <[email protected]> References: illumos/illumos-gate@57221772c3fc05faba04bf48ddff45abf2bbf2bd https://www.illumos.org/issues/2762 Ported-by: Brian Behlendorf <[email protected]>
* Illumos #3090 and #3102George Wilson2013-01-081-0/+1
| | | | | | | | | | | | | | | | | | | 3090 vdev_reopen() during reguid causes vdev to be treated as corrupt 3102 vdev_uberblock_load() and vdev_validate() may read the wrong label Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: Christopher Siden <[email protected]> Reviewed by: Garrett D'Amore <[email protected]> Approved by: Eric Schrock <[email protected]> References: illumos/illumos-gate@dfbb943217bf8ab22a1a9d2e9dca01d4da95ee0b illumos changeset: 13777:b1e53580146d https://www.illumos.org/issues/3090 https://www.illumos.org/issues/3102 Ported-by: Brian Behlendorf <[email protected]> Closes #939
* Illumos #2619 and #2747Christopher Siden2013-01-081-2/+18
| | | | | | | | | | | | | | | | | | | | | | 2619 asynchronous destruction of ZFS file systems 2747 SPA versioning with zfs feature flags Reviewed by: Matt Ahrens <[email protected]> Reviewed by: George Wilson <[email protected]> Reviewed by: Richard Lowe <[email protected]> Reviewed by: Dan Kruchinin <[email protected]> Approved by: Eric Schrock <[email protected]> References: illumos/illumos-gate@53089ab7c84db6fb76c16ca50076c147cda11757 illumos/illumos-gate@ad135b5d644628e791c3188a6ecbd9c257961ef8 illumos changeset: 13700:2889e2596bd6 https://www.illumos.org/issues/2619 https://www.illumos.org/issues/2747 NOTE: The grub specific changes were not ported. This change must be made to the Linux grub packages. Ported-by: Brian Behlendorf <[email protected]>
* Illumos #2703: add mechanism to report ZFS send progressBill Pijewski2012-09-191-0/+2
| | | | | | | | | | | | | Reviewed by: Matt Ahrens <[email protected]> Reviewed by: Robert Mustacchi <[email protected]> Reviewed by: Richard Lowe <[email protected]> Approved by: Eric Schrock <[email protected]> References: https://www.illumos.org/issues/2703 Ported by: Martin Matuska <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]>
* Illumos #1948: zpool list should show more detailed pool infoChris Siden2012-09-191-1/+4
| | | | | | | | | | | | | | | | | | Reviewed by: Adam Leventhal <[email protected]> Reviewed by: Matt Ahrens <[email protected]> Reviewed by: Eric Schrock <[email protected]> Reviewed by: Richard Lowe <[email protected]> Reviewed by: Albert Lee <[email protected]> Reviewed by: Dan McDonald <[email protected]> Reviewed by: Garrett D'Amore <[email protected]> Approved by: Eric Schrock <[email protected]> References: https://www.illumos.org/issues/1948 Ported by: Martin Matuska <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #685
* Remove autotools productsBrian Behlendorf2012-08-271-616/+0
| | | | | | | | Remove all of the generated autotools products from the repository and update the .gitignore files accordingly. Signed-off-by: Brian Behlendorf <[email protected]> Closes #718
* Illumos #1693: persistent 'comment' field for a zpoolDan McDonald2012-08-081-0/+5
| | | | | | | | | | | | | Reviewed by: George Wilson <[email protected]> Reviewed by: Eric Schrock <[email protected]> Approved by: Richard Lowe <[email protected]> References: https://www.illumos.org/issues/1693 Ported by: Martin Matuska <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #678
* Set zvol discard_granularity to the volblocksize.Etienne Dechamps2012-08-071-0/+1
| | | | | | | | | | | | | | | | | | Currently, zvols have a discard granularity set to 0, which suggests to the upper layer that discard requests of arbirarily small size and alignment can be made efficiently. In practice however, ZFS does not handle unaligned discard requests efficiently: indeed, it is unable to free a part of a block. It will write zeros to the specified range instead, which is both useless and inefficient (see dnode_free_range). With this patch, zvol block devices expose volblocksize as their discard granularity, so the upper layer is aware that it's not supposed to send discard requests smaller than volblocksize. Signed-off-by: Brian Behlendorf <[email protected]> Closes #862
* Illumos #1644, #1645, #1646, #1647, #1708Matthew Ahrens2012-07-311-2/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1644 add ZFS "clones" property 1645 add ZFS "written" and "written@..." properties 1646 "zfs send" should estimate size of stream 1647 "zfs destroy" should determine space reclaimed by destroying multiple snapshots 1708 adjust size of zpool history data References: https://www.illumos.org/issues/1644 https://www.illumos.org/issues/1645 https://www.illumos.org/issues/1646 https://www.illumos.org/issues/1647 https://www.illumos.org/issues/1708 This commit modifies the user to kernel space ioctl ABI. Extra care should be taken when updating to ensure both the kernel modules and utilities are updated. This change has reordered all of the new ioctl()s to the end of the list. This should help minimize this issue in the future. Reviewed by: Richard Lowe <[email protected]> Reviewed by: George Wilson <[email protected]> Reviewed by: Albert Lee <[email protected]> Approved by: Garrett D'Amore <[email protected]> Ported by: Martin Matuska <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #826 Closes #664
* Linux 3.5 compat, end_writeback() changed to clear_inode()Richard Yao2012-07-231-0/+1
| | | | | | | | | | | | | | | | The end_writeback() function was changed by moving the call to inode_sync_wait() earlier in to evict(). This effecitvely changes the ordering of the sync but it does not impact the details of the zfs implementation. However, as part of this change end_writeback() was renamed to clear_inode() to reflect the new semantics. This change does impact us and clear_inode() now maps to end_writeback() for kernels prior to 3.5. Signed-off-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #784
* Linux 3.5 compat, iops->truncate_range() removedRichard Yao2012-07-231-0/+1
| | | | | | | | | The vmtruncate_range() support has been removed from the kernel in favor of using the fallocate method in the file_operations table. Signed-off-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #784
* Linux 3.5 compat, eops->encode_fh() takes inodesRichard Yao2012-07-231-0/+1
| | | | | | | | | | | | | | The export_operations member ->encode_fh() has been updated to take both the child and parent inodes. This interface used to take the child dentry and a bool describing if the parent is needed. NOTE: While updating this code I noticed that we do not currently cleanly handle the case where we're passed a connectable parent. This code should be audited to make sure we're doing the right thing. Signed-off-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Issue #784
* Move partition scanning from userspace to module.Etienne Dechamps2012-07-171-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, zpool online -e (dynamic vdev expansion) doesn't work on whole disks because we're invoking ioctl(BLKRRPART) from userspace while ZFS still has a partition open on the disk, which results in EBUSY. This patch moves the BLKRRPART invocation from the zpool utility to the module. Specifically, this is done just before opening the device in vdev_disk_open() which is called inside vdev_reopen(). This requires jumping through some hoops to get to the disk device from the partition device, and to make sure we can still open the partition after the BLKRRPART call. Note that this new code path is triggered on dynamic vdev expansion only; other actions, like creating a new pool, are unchanged and still call BLKRRPART from userspace. This change also depends on API changes which are available in 2.6.37 and latter kernels. The build system has been updated to detect this, but there is no compatibility mode for older kernels. This means that online expansion will NOT be available in older kernels. However, it will still be possible to expand the vdev offline. Signed-off-by: Brian Behlendorf <[email protected]> Closes #808
* Illumos #1748: desire support for reguid in zfsGarrett D'Amore2012-07-111-0/+3
| | | | | | | | | | | | | | | | | | | | | | Reviewed by: George Wilson <[email protected]> Reviewed by: Igor Kozhukhov <[email protected]> Reviewed by: Alexander Eremin <[email protected]> Reviewed by: Alexander Stetsenko <[email protected]> Approved by: Richard Lowe <[email protected]> References: https://www.illumos.org/issues/1748 This commit modifies the user to kernel space ioctl ABI. Extra care should be taken when updating to ensure both the kernel modules and utilities are updated. If only the user space component is updated both the 'zpool events' command and the 'zpool reguid' command will not work until the kernel modules are updated. Ported by: Martin Matuska <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #665
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