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* Include third party licenses in dist tarballsNeal Gompa (ニール・ゴンパ)2019-01-081-0/+3
| | | | | | | | | | | | | | | | Since the merge of the Linux Solaris Porting Layer source tree into the ZFS codebase, ZFS is now a double-licensed codebase, with the former SPL codebase retaining its license (GPLv2+) within the ZFS source tree. However, the license files for SPL were not being included in the tarballs generated by autotools. This change corrects that. In addition, all the other third party licenses in the codebase are now properly declared to be included in the dist tarballs. Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Neal Gompa <[email protected]> Closes #8242
* OpenZFS 9102 - zfs should be able to initialize storage devicesGeorge Wilson2019-01-074-0/+139
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | PROBLEM ======== The first access to a block incurs a performance penalty on some platforms (e.g. AWS's EBS, VMware VMDKs). Therefore we recommend that volumes are "thick provisioned", where supported by the platform (VMware). This can create a large delay in getting a new virtual machines up and running (or adding storage to an existing Engine). If the thick provision step is omitted, write performance will be suboptimal until all blocks on the LUN have been written. SOLUTION ========= This feature introduces a way to 'initialize' the disks at install or in the background to make sure we don't incur this first read penalty. When an entire LUN is added to ZFS, we make all space available immediately, and allow ZFS to find unallocated space and zero it out. This works with concurrent writes to arbitrary offsets, ensuring that we don't zero out something that has been (or is in the middle of being) written. This scheme can also be applied to existing pools (affecting only free regions on the vdev). Detailed design: - new subcommand:zpool initialize [-cs] <pool> [<vdev> ...] - start, suspend, or cancel initialization - Creates new open-context thread for each vdev - Thread iterates through all metaslabs in this vdev - Each metaslab: - select a metaslab - load the metaslab - mark the metaslab as being zeroed - walk all free ranges within that metaslab and translate them to ranges on the leaf vdev - issue a "zeroing" I/O on the leaf vdev that corresponds to a free range on the metaslab we're working on - continue until all free ranges for this metaslab have been "zeroed" - reset/unmark the metaslab being zeroed - if more metaslabs exist, then repeat above tasks. - if no more metaslabs, then we're done. - progress for the initialization is stored on-disk in the vdev’s leaf zap object. The following information is stored: - the last offset that has been initialized - the state of the initialization process (i.e. active, suspended, or canceled) - the start time for the initialization - progress is reported via the zpool status command and shows information for each of the vdevs that are initializing Porting notes: - Added zfs_initialize_value module parameter to set the pattern written by "zpool initialize". - Added zfs_vdev_{initializing,removal}_{min,max}_active module options. Authored by: George Wilson <[email protected]> Reviewed by: John Wren Kennedy <[email protected]> Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: Pavel Zakharov <[email protected]> Reviewed by: Prakash Surya <[email protected]> Reviewed by: loli10K <[email protected]> Reviewed by: Brian Behlendorf <[email protected]> Approved by: Richard Lowe <[email protected]> Signed-off-by: Tim Chase <[email protected]> Ported-by: Tim Chase <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/9102 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/c3963210eb Closes #8230
* Add missing MMP status code to libzfs_statusbunder20152019-01-031-19/+33
| | | | | | | | | | | | When MMP was merged the status codes in libzfs_status were not updated to add the status code for ZPOOL_STATUS_IO_FAILURE_MMP. This commit corrects this and adds comments to help keep track of which code is used for which status. Reviewed-by: Olaf Faaland <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: bunder2015 <[email protected]> Closes #8148 Closes #8222
* OpenZFS 9284 - arc_reclaim_thread has 2 jobsBrad Lewis2018-12-261-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Following the fix for 9018 (Replace kmem_cache_reap_now() with kmem_cache_reap_soon), the arc_reclaim_thread() no longer blocks while reaping. However, the code is still confusing and error-prone, because this thread has two responsibilities. We should instead separate this into two threads each with their own responsibility: 1. keep `arc_size` under `arc_c`, by calling `arc_adjust()`, which improves `arc_is_overflowing()` 2. keep enough free memory in the system, by calling `arc_kmem_reap_now()` plus `arc_shrink()`, which improves `arc_available_memory()`. Furthermore, we can use the zthr infrastructure to separate the "should we do something" from "do it" parts of the logic, and normalize the start up / shut down of the threads. Authored by: Brad Lewis <[email protected]> Reviewed by: Matt Ahrens <[email protected]> Reviewed by: Serapheim Dimitropoulos <[email protected]> Reviewed by: Pavel Zakharov <[email protected]> Reviewed by: Dan Kimmel <[email protected]> Reviewed by: Paul Dagnelie <[email protected]> Reviewed by: Dan McDonald <[email protected]> Reviewed by: Tim Kordas <[email protected]> Reviewed by: Tim Chase <[email protected]> Reviewed by: Brian Behlendorf <[email protected]> Ported-by: Brad Lewis <[email protected]> Signed-off-by: Brad Lewis <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/9284 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/de753e34f9 Closes #8165
* OpenZFS 9559 - zfs diff handles files on delete queue in fromsnap poorlyPaul Dagnelie2018-12-141-6/+6
| | | | | | | | | | | | Authored by: Paul Dagnelie <[email protected]> Reviewed by: Joshua M. Clulow <[email protected]> Reviewed by: Tom Caputi <[email protected]> Approved by: Richard Lowe <[email protected]> Ported-by: Brian Behlendorf <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/9559 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/d7e45412 Closes #8211
* OpenZFS 9630 - add lzc_rename and lzc_destroy to libzfs_coreAndriy Gapon2018-12-143-34/+54
| | | | | | | | | | | | | | | | | | | | Porting Notes: * Additional changes to recv_rename_impl() were required due to encryption code not being merged in OpenZFS yet. * libzfs_core python bindings (pyzfs) were updated to fully support both lzc_rename() and lzc_destroy() Authored by: Andriy Gapon <[email protected]> Reviewed by: Andy Stormont <[email protected]> Reviewed by: Matt Ahrens <[email protected]> Reviewed by: Serapheim Dimitropoulos <[email protected]> Reviewed by: Brian Behlendorf <[email protected]> Approved by: Dan McDonald <[email protected]> Ported-by: loli10K <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/9630 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/049ba63 Closes #8207
* Check for strlcat and strlcpyBrian Behlendorf2018-12-114-49/+124
| | | | | | | | | | | | | | | | This partially reverts commit 8005ca4 by moving the strlcat() and strlcpy() compatibility implementations back to their original location. In addition, these two functions were added to the AC_CHECK_FUNCS macro. When these functions are available from the C library, HAVE_STRLCAT and HAVE_STRLCPY will be defined and library version used. Otherwise the compatibility version is built. Reviewed-by: Sebastian Gottschall <[email protected]> Reviewed-by: Alek Pinchuk <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #8157 Closes #8202
* OpenZFS 9880 - Race in ZFS parallel mountAndy Fiddaman2018-12-071-3/+31
| | | | | | | | | | | | | | | | | Porting Notes: * Not required for Linux since the zone is always global. But we'll want this change if we start using the zones code. Authored by: Andy Fiddaman <[email protected]> Reviewed by: Jason King <[email protected]> Reviewed by: Sebastien Roy <[email protected]> Reviewed by: Tom Caputi <[email protected]> Approved by: Joshua M. Clulow <[email protected]> Ported-by: Brian Behlendorf <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/9880 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/bc4c0ff134 Closes #8189
* Fix error message when zfs module is not loadedTom Caputi2018-12-071-3/+3
| | | | | | | | | | | This patch corrects a small issue where the wrong error message was being displayed when the zfs kernel module was not loaded. This also avoids waiting for the (by default) 10s timeout to see if the /dev/zfs device appears. Reviewed-by: George Melikov <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Tom Caputi <[email protected]> Closes #8187
* Fix 'zfs receive -F' message when destination has snapshotsloli10K2018-12-051-1/+1
| | | | | | | | | | | | | | | | | | When receiving a send stream with forced rollback on a dataset with snapshots zfs suggests said snapshots must be removed to successfully receive the stream; however the message is misleading because it prints the dataset name instead of one of its snapshots. $ sudo zfs snap pp/recvfs@snap-orig $ sudo zfs recv -F pp/recvfs < sendstream cannot receive new filesystem stream: destination has snapshots (eg. pp/recvfs) must destroy them to overwrite it This change simply restores the snapshot name in the error message. Reviewed-by: George Melikov <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: loli10K <[email protected]> Closes #8167
* Fix ASSERT in zfs_receive_one()LOLi2018-12-041-2/+3
| | | | | | | | | | | | | | | This commit fixes the following ASSERT in zfs_receive_one() when receiving a send stream from a root dataset with the "-e" option: $ sudo zfs snap source@snap $ sudo zfs send source@snap | sudo zfs recv -e destination/recv chopprefix > drrb->drr_toname ASSERT at libzfs_sendrecv.c:3804:zfs_receive_one() Reviewed-by: Tom Caputi <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed by: Paul Dagnelie <[email protected]> Signed-off-by: loli10K <[email protected]> Closes #8121
* Move strlcat, strlcpy, and strnlenBrian Behlendorf2018-11-205-158/+50
| | | | | | | | | | | | | | | | | | | | | | | | Move strlcat() and strlcpy() from .c source files in to the libspl string.h header. By changing these compatibility functions to static inline functions they can included as needed without requiring linking with the libspl.so library. Remove strnlen() which is barely used in the source, and has been provided by glibc since v2.10. Finally, convert four instances of strncpy() to strlcpy() in libzfs_input_check.c which were causing build warnings when compiling with gcc 8.2.1. For example: libzfs_input_check.c: In function ‘zfs_destroy’: libzfs_input_check.c:651:9: error: ‘strncpy’ specified bound \ 4096 equals destination size [-Werror=stringop-truncation] (void) strncpy(zc.zc_name, dataset, sizeof (zc.zc_name)); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Reviewed-by: Olaf Faaland <[email protected]> Reviewed-by: Richard Laager <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #8116
* OpenZFS 8115 - parallel zfs mountSebastien Roy2018-11-152-98/+368
| | | | | | | | | | | | | | | | | | | | | | | | Porting Notes: * Use thread pools (tpool) API instead of introducing taskq interfaces to libzfs. * Use pthread_mutext for locks as mutex_t isn't available. * Ignore alternative libshare initialization since OpenZFS-7955 is not present on zfsonlinux. Authored by: Sebastien Roy <[email protected]> Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: Pavel Zakharov <[email protected]> Reviewed by: Brad Lewis <[email protected]> Reviewed by: George Wilson <[email protected]> Reviewed by: Paul Dagnelie <[email protected]> Reviewed by: Prashanth Sreenivasa <[email protected]> Authored by: Brian Behlendorf <[email protected]> Approved by: Matt Ahrens <[email protected]> Ported-by: Don Brady <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/8115 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/a3f0e2b569 Closes #8092
* Fix libudev dependency in libzutilDon Brady2018-11-061-0/+2
| | | | | | | | | | ZFS should be able to build without libudev installed. The recent change for libzutil inadvertently broke that. Make the libudev code conditional in zutil_import.c to resolve the build failure. Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Tony Hutter <[email protected]> Signed-off-by: Don Brady <[email protected]> Closes #8097
* zpool: bogus error for invalid dedupditto valueLOLi2018-11-061-3/+15
| | | | | | | | | | | | | | | When provided with an invalid 'dedupditto' value zpool prints a misleading error message: $ sudo zpool set dedupditto=99 pp cannot set property for 'pp': property 'dedupditto'(14) not defined Fix this by printing a meaningful error description for unsupported 'dedupditto' values. Reviewed-by: Olaf Faaland <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: loli10K <[email protected]> Closes #8079
* Add libzutil for libzfs or libzpool consumersDon Brady2018-11-0516-3150/+3425
| | | | | | | | | | | Adds a libzutil for utility functions that are common to libzfs and libzpool consumers (most of what was in libzfs_import.c). This removes the need for utilities to link against both libzpool and libzfs. Reviewed-by: Matthew Ahrens <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Don Brady <[email protected]> Closes #8050
* Improve snapshot listing error messageMd Islam2018-10-301-2/+4
| | | | | | | | | | | | | | Provide a hint in the error message if listing snapshots for a single dataset fails. Using -r is not needed to list all snapshots so requiring it when listing snapshots for a single dataset makes it confusing. This change will make the error message more clear. Reviewed-by: Matthew Ahrens <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Md Islam <[email protected]> Closes #8047
* Fix dbgmsg printing in ztest and zdbTom Caputi2018-10-241-5/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch resolves a problem where the -G option in both zdb and ztest would cause the code to call __dprintf() to print zfs_dbgmsg output. This function was not properly wired to add messages to the dbgmsg log as it is in userspace and so the messages were simply dropped. This patch also tries to add some degree of distinction to dprintf() (which now prints directly to stdout) and zfs_dbgmsg() (which adds messages to an internal list that can be dumped with zfs_dbgmsg_print()). In addition, this patch corrects an issue where ztest used a global variable to decide whether to dump the dbgmsg buffer on a crash. This did not work because ztest spins up more instances of itself using execv(), which did not copy the global variable to the new process. The option has been moved to the ztest_shared_opts_t which already exists for interprocess communication. This patch also changes zfs_dbgmsg_print() to use write() calls instead of printf() so that it will not fail when used in a signal handler. Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Serapheim Dimitropoulos <[email protected]> Reviewed-by: Matthew Ahrens <[email protected]> Signed-off-by: Tom Caputi <[email protected]> Closes #8010
* Fix changelist mounted-dataset iterationAlek P2018-10-103-24/+39
| | | | | | | | | | | Commit 0c6d093 caused a regression in the inherit codepath. The fix is to restrict the changelist iteration on mountpoints and add proper handling for 'legacy' mountpoints Reviewed by: Serapheim Dimitropoulos <[email protected]> Reviewed by: Brian Behlendorf <[email protected]> Signed-off-by: Alek Pinchuk <[email protected]> Closes #7988 Closes #7991
* Refactor dmu_recv into its own filePaul Dagnelie2018-10-091-0/+1
| | | | | | | | | | This change moves the bottom half of dmu_send.c (where the receive logic is kept) into a new file, dmu_recv.c, and does similarly for receive-related changes in header files. Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: Brian Behlendorf <[email protected]> Signed-off-by: Paul Dagnelie <[email protected]> Closes #7982
* Fix ASSERT macros to not over-expandPaul Dagnelie2018-10-031-15/+48
| | | | | | | | | The code reuse in the definitions of the ASSERT and VERIFY macros result in expansion of their arguments before they are stringified, which produces ugly and undesirable output. Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Paul Dagnelie <[email protected]> Closes #7884
* Fix "zfs destroy" when "sharenfs=on" is usedPrakash Surya2018-10-031-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When using "zfs destroy" on a dataset that is using "sharenfs=on" and has been automatically exported (by libzfs), the dataset will not be automatically unexported as it should be. This workflow appears to have been broken by this commit: 3fd3e56cfd543d7d7a1bf502bfc0db6e24139668 In that change, the "zfs_unmount" function was modified to use the "mnt.mnt_special" field when determining the mount point that is being unmounted, rather than "mnt.mnt_mountp". As a result, when "mntpt" is passed into "zfs_unshare_proto", it's value is now the dataset name rather than the mountpoint. Thus, when this value is used with the "is_shared" function (via "zfs_unshare_proto") it will not find a match (since that function assumes it'll be passed the mountpoint) and incorrectly reports that the dataset is not shared. This can be easily reproduced with the following commands: $ sudo zpool create tank xvdb $ sudo zfs create -o sharenfs=on tank/fish $ sudo zfs destroy tank/fish $ sudo zfs list -r tank NAME USED AVAIL REFER MOUNTPOINT tank 97.5K 7.27G 24K /tank $ sudo exportfs /tank/fish <world> $ sudo cat /etc/dfs/sharetab /tank/fish - nfs rw,crossmnt At this point, the "tank/fish" filesystem doesn't exist, but it's still listed as exported when looking at "exportfs" and "/etc/dfs/sharetab". Also note, this change brings us back in-sync with the illumos code, as it pertains to this one line; on illumos, "mnt.mnt_mountp" is used. Reviewed by: loli10K <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Co-authored-by: George Wilson <[email protected]> Signed-off-by: Prakash Surya <[email protected]> Issue #6143 Closes #7941
* OpenZFS 9616 - Bogus error when attempting to set property on read-only poolAndrew Stormont2018-10-031-3/+8
| | | | | | | | | | | | Authored by: Andrew Stormont <[email protected]> Reviewed by: Paul Dagnelie <[email protected]> Reviewed by: Matt Ahrens <[email protected]> Approved by: Robert Mustacchi <[email protected]> Ported-by: Brian Behlendorf <[email protected]> OpenZFS-issue: https://illumos.org/issues/9616 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/f62db44d Closes #7974
* changelist should be able to iter on mountsAlek P2018-10-022-65/+172
| | | | | | | | | | | | | Modified changelist_gather()ing for the mountpoint property. Now instead of iterating on all dataset descendants, we read /proc/self/mounts and iterate on the mounted descendant datasets only. Switched changelist implementation from a uu_list_* to uu_avl_* in order to reduce changlist code-path's worst case time complexity. Reviewed by: Don Brady <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Alek Pinchuk <[email protected]> Closes #7967
* Fixes for procfs files backed by linked listsJohn Gallagher2018-09-261-0/+51
| | | | | | | | | | | | | | | | | | | | | | | | | | | There are some issues with the way the seq_file interface is implemented for kstats backed by linked lists (zfs_dbgmsgs and certain per-pool debugging info): * We don't account for the fact that seq_file sometimes visits a node multiple times, which results in missing messages when read through procfs. * We don't keep separate state for each reader of a file, so concurrent readers will receive incorrect results. * We don't account for the fact that entries may have been removed from the list between read syscalls, so reading from these files in procfs can cause the system to crash. This change fixes these issues and adds procfs_list, a wrapper around a linked list which abstracts away the details of implementing the seq_file interface for a list and exposing the contents of the list through procfs. Reviewed by: Don Brady <[email protected]> Reviewed-by: Serapheim Dimitropoulos <[email protected]> Reviewed by: Brad Lewis <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: John Gallagher <[email protected]> External-issue: LX-1211 Closes #7819
* Pool allocation classesDon Brady2018-09-053-7/+83
| | | | | | | | | | | | | | | | | | | | Allocation Classes add the ability to have allocation classes in a pool that are dedicated to serving specific block categories, such as DDT data, metadata, and small file blocks. A pool can opt-in to this feature by adding a 'special' or 'dedup' top-level VDEV. Reviewed by: Pavel Zakharov <[email protected]> Reviewed-by: Richard Laager <[email protected]> Reviewed-by: Alek Pinchuk <[email protected]> Reviewed-by: Håkan Johansson <[email protected]> Reviewed-by: Andreas Dilger <[email protected]> Reviewed-by: DHE <[email protected]> Reviewed-by: Richard Elling <[email protected]> Reviewed-by: Gregor Kopka <[email protected]> Reviewed-by: Kash Pande <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Matthew Ahrens <[email protected]> Signed-off-by: Don Brady <[email protected]> Closes #5182
* Add basic zfs ioc input nvpair validationDon Brady2018-09-022-2/+85
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We want newer versions of libzfs_core to run against an existing zfs kernel module (i.e. a deferred reboot or module reload after an update). Programmatically document, via a zfs_ioc_key_t, the valid arguments for the ioc commands that rely on nvpair input arguments (i.e. non legacy commands from libzfs_core). Automatically verify the expected pairs before dispatching a command. This initial phase focuses on the non-legacy ioctls. A follow-on change can address the legacy ioctl input from the zfs_cmd_t. The zfs_ioc_key_t for zfs_keys_channel_program looks like: static const zfs_ioc_key_t zfs_keys_channel_program[] = { {"program", DATA_TYPE_STRING, 0}, {"arg", DATA_TYPE_UNKNOWN, 0}, {"sync", DATA_TYPE_BOOLEAN_VALUE, ZK_OPTIONAL}, {"instrlimit", DATA_TYPE_UINT64, ZK_OPTIONAL}, {"memlimit", DATA_TYPE_UINT64, ZK_OPTIONAL}, }; Introduce four input errors to identify specific input failures (in addition to generic argument value errors like EINVAL, ERANGE, EBADF, and E2BIG). ZFS_ERR_IOC_CMD_UNAVAIL the ioctl number is not supported by kernel ZFS_ERR_IOC_ARG_UNAVAIL an input argument is not supported by kernel ZFS_ERR_IOC_ARG_REQUIRED a required input argument is missing ZFS_ERR_IOC_ARG_BADTYPE an input argument has an invalid type Reviewed-by: Matthew Ahrens <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Don Brady <[email protected]> Closes #7780
* Add zfs module feature and property info to sysfsDon Brady2018-09-022-0/+18
| | | | | | | | | | | | | | | | | | | | | This extends our sysfs '/sys/module/zfs' entry to include feature and property attributes. The primary consumer of this information is user processes, like the zfs CLI, that need to know what the current loaded ZFS module supports. The libzfs binary will consult this information when instantiating the zfs and zpool property tables and the pool features table. This introduces 4 kernel objects (dirs) into '/sys/module/zfs' with corresponding attributes (files): features.runtime features.pool properties.dataset properties.pool Reviewed-by: Matthew Ahrens <[email protected]> Reviewed-by: Tony Hutter <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Don Brady <[email protected]> Closes #7706
* Fedora 28: Fix misc bounds check compiler warningsJoao Carlos Mendes Luis2018-08-261-1/+1
| | | | | | | | | | | Fix a bunch of truncation compiler warnings that show up on Fedora 28 (GCC 8.0.1). Reviewed-by: Giuseppe Di Natale <[email protected]> Reviewed-by: George Melikov <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Issue #7368 Closes #7826 Closes #7830
* Added encryption support for zfs recv -o / -xTom Caputi2018-08-155-32/+136
| | | | | | | | | | | | | | | | | | | | | | | | | | | | One small integration that was absent from b52563 was support for zfs recv -o / -x with regards to encryption parameters. The main use cases of this are as follows: * Receiving an unencrypted stream as encrypted without needing to create a "dummy" encrypted parent so that encryption can be inheritted. * Allowing users to change their keylocation on receive, so long as the receiving dataset is an encryption root. * Allowing users to explicitly exclude or override the encryption property from an unencrypted properties stream, allowing it to be received as encrypted. * Receiving a recursive heirarchy of unencrypted datasets, encrypting the top-level one and forcing all children to inherit the encryption. Reviewed-by: Jorgen Lundman <[email protected]> Reviewed by: Matthew Ahrens <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Richard Elling <[email protected]> Signed-off-by: Tom Caputi <[email protected]> Closes #7650
* Add support for selecting encryption backendNathan Lewis2018-08-021-2/+7
| | | | | | | | | | | | | | | | | | - Add two new module parameters to icp (icp_aes_impl, icp_gcm_impl) that control the crypto implementation. At the moment there is a choice between generic and aesni (on platforms that support it). - This enables support for AES-NI and PCLMULQDQ-NI on AMD Family 15h (bulldozer) and newer CPUs (zen). - Modify aes_key_t to track what implementation it was generated with as key schedules generated with various implementations are not necessarily interchangable. Reviewed by: Gvozden Neskovic <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Tom Caputi <[email protected]> Reviewed-by: Richard Laager <[email protected]> Signed-off-by: Nathaniel R. Lewis <[email protected]> Closes #7102 Closes #7103
* OpenZFS 9580 - Add a hash-table on top of nvlist to speed-up operationsSerapheim Dimitropoulos2018-07-301-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | = Motivation While dealing with another performance issue (see 126118f) we noticed that we spend a lot of time in various places in the kernel when constructing long nvlists. The problem is that when an nvlist is created with the NV_UNIQUE_NAME set (which is the case most of the time), we do a linear search through the whole list to ensure uniqueness for every entry we add. An example of the above scenario can be seen in the following flamegraph, where more than have the time of the zfsdev_ioctl() is spent on constructing nvlists. Flamegraph: https://sdimitro.github.io/img/flame/sdimitro_snap_unmount3.svg Adding a table to speed up lookups will help situations where we just construct an nvlist (like the scenario above), in addition to regular lookups and removals. = What this patch does In this diff we've implemented a hash-table on top of the nvlist code that converts most nvlist operations from O(# number of entries) to O(1)* (the start is for amortized time as the hash-table grows and shrinks depending on the # of entries - plain lookup is strictly O(1)). = Performance Analysis To analyze the performance improvement I just used the setup from the snapshot deletion issue mentioned above in the Motivation section. Basically I created 10K filesystems with one snapshot each and then I just used the API of libZFS_Core to pass down an nvlist of all the snapshots to have them deleted. The reason I used my own driver program was to have clean performance results of what actually happens in the kernel. The flamegraphs and wall clock times mentioned below were gathered from the start to the end of the driver program's run. Between trials the testpool used was completely destroyed, the system was rebooted and the testpool was completely recreated. The reason for this dance was to get consistent results. == Results (before patch): === Sampling Flamegraphs [Trial 1] https://sdimitro.github.io/img/flame/DLPX-53417/trial-A.svg [Trial 2] https://sdimitro.github.io/img/flame/DLPX-53417/trial-A2.svg [Trial 3] https://sdimitro.github.io/img/flame/DLPX-53417/trial-A3.svg === Wall clock times (in seconds) ``` [Trial 4] real 5.3 user 0.4 sys 2.3 [Trial 5] real 8.2 user 0.4 sys 2.4 [Trial 6] real 6.0 user 0.5 sys 2.3 ``` == Results (after patch): === Sampling Flamegraphs [Trial 1] https://sdimitro.github.io/img/flame/DLPX-53417/trial-Ae.svg [Trial 2] https://sdimitro.github.io/img/flame/DLPX-53417/trial-A2e.svg [Trial 3] https://sdimitro.github.io/img/flame/DLPX-53417/trial-A3e.svg === Wall clock times (in seconds) ``` [Trial 4] real 4.9 user 0.0 sys 0.9 [Trial 5] real 3.8 user 0.0 sys 0.9 [Trial 6] real 3.6 user 0.0 sys 0.9 ``` == Analysis The results between the trials are consistent so in this sections I will only talk about the flamegraph results from trial-1 and the wall-clock results from trial-4. From trial-1 we can see that zfs_dev_ioctl() goes from 2,331 to 996 samples counts. Specifically, the samples from fnvlist_add_nvlist() and spa_history_log_nvl() are almost gone (~500 & ~800 to 5 & 5 samples), leaving zfs_ioc_destroy_snaps() to dominate most samples from zfs_dev_ioctl(). From trial-4 we see that the user time dropped to 0 secods. I believe the consistent 0.4 seconds before my patch was applied was due to my driver program constructing the long nvlist of snapshots so it can pass it to the kernel. As for the system time, the effect there is more clear (2.3 down to 0.9 seconds). Porting Notes: * DATA_TYPE_DONTCARE case added to switch in fm_nvprintr() and zpool_do_events_nvprint(). Authored by: Serapheim Dimitropoulos <[email protected]> Reviewed by: Matt Ahrens <[email protected]> Reviewed by: Sebastien Roy <[email protected]> Approved by: Robert Mustacchi <[email protected]> Ported-by: Brian Behlendorf <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/9580 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/b5eca7b1 Closes #7748
* OpenZFS 9457 - libzfs_import.c:add_config() has a memory leaksara hartse2018-07-241-18/+6
| | | | | | | | | | | | | | | | | | | | | | | | A memory leak occurs on lines 209 and 213 because the config is not freed in the error case. The interface to add_config() seems less than ideal - it would be better if it copied any data necessary from the config and the caller freed it. Porting notes: * This issue had already been resolved on Linux by adding the missing calls to nvlist_free(). But we'll adopt the upstream fix to keep the behavior of the code consistent. Authored by: Sara Hartse <[email protected]> Reviewed by: Matt Ahrens <[email protected]> Reviewed by: Serapheim Dimitropoulos <[email protected]> Reviewed by: Giuseppe Di Natale <[email protected]> Reviewed by: George Melikov <[email protected]> Approved by: Robert Mustacchi <[email protected]> Ported-by: Brian Behlendorf <[email protected]> OpenZFS-issue: https://illumos.org/issues/9457 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/be86bb8a Closes #7713
* Add support for autoexpand propertyBrian Behlendorf2018-07-232-16/+70
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | While the autoexpand property may seem like a small feature it depends on a significant amount of system infrastructure. Enough of that infrastructure is now in place that with a few modifications for Linux it can be supported. Auto-expand works as follows; when a block device is modified (re-sized, closed after being open r/w, etc) a change uevent is generated for udev. The ZED, which is monitoring udev events, passes the change event along to zfs_deliver_dle() if the disk or partition contains a zfs_member as identified by blkid. From here the device is matched against all imported pool vdevs using the vdev_guid which was read from the label by blkid. If a match is found the ZED reopens the pool vdev. This re-opening is important because it allows the vdev to be briefly closed so the disk partition table can be re-read. Otherwise, it wouldn't be possible to report the maximum possible expansion size. Finally, if the property autoexpand=on a vdev expansion will be attempted. After performing some sanity checks on the disk to verify that it is safe to expand, the primary partition (-part1) will be expanded and the partition table updated. The partition is then re-opened (again) to detect the updated size which allows the new capacity to be used. In order to make all of the above possible the following changes were required: * Updated the zpool_expand_001_pos and zpool_expand_003_pos tests. These tests now create a pool which is layered on a loopback, scsi_debug, and file vdev. This allows for testing of non- partitioned block device (loopback), a partition block device (scsi_debug), and a file which does not receive udev change events. This provided for better test coverage, and by removing the layering on ZFS volumes there issues surrounding layering one pool on another are avoided. * zpool_find_vdev_by_physpath() updated to accept a vdev guid. This allows for matching by guid rather than path which is a more reliable way for the ZED to reference a vdev. * Fixed zfs_zevent_wait() signal handling which could result in the ZED spinning when a signal was not handled. * Removed vdev_disk_rrpart() functionality which can be abandoned in favor of kernel provided blkdev_reread_part() function. * Added a rwlock which is held as a writer while a disk is being reopened. This is important to prevent errors from occurring for any configuration related IOs which bypass the SCL_ZIO lock. The zpool_reopen_007_pos.ksh test case was added to verify IO error are never observed when reopening. This is not expected to impact IO performance. Additional fixes which aren't critical but were discovered and resolved in the course of developing this functionality. * Added PHYS_PATH="/dev/zvol/dataset" to the vdev configuration for ZFS volumes. This is as good as a unique physical path, while the volumes are not used in the test cases anymore for other reasons this improvement was included. Reviewed by: Richard Elling <[email protected]> Signed-off-by: Sara Hartse <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #120 Closes #2437 Closes #5771 Closes #7366 Closes #7582 Closes #7629
* Fix kernel unaligned access on sparc64Brian Behlendorf2018-07-111-0/+7
| | | | | | | | | | | | | | Update the SA_COPY_DATA macro to check if architecture supports efficient unaligned memory accesses at compile time. Otherwise fallback to using the sa_copy_data() function. The kernel provided CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS is used to determine availability in kernel space. In user space the x86_64, x86, powerpc, and sometimes arm architectures will define the HAVE_EFFICIENT_UNALIGNED_ACCESS macro. Signed-off-by: Brian Behlendorf <[email protected]> Closes #7642 Closes #7684
* OpenZFS 9330 - stack overflow when creating a deeply nested datasetSerapheim Dimitropoulos2018-07-091-0/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Datasets that are deeply nested (~100 levels) are impractical. We just put a limit of 50 levels to newly created datasets. Existing datasets should work without a problem. The problem can be seen by attempting to create a dataset using the -p option with many levels: panic[cpu0]/thread=ffffff01cd282c20: BAD TRAP: type=8 (#df Double fault) rp=ffffffff fffffffffbc3aa60 unix:die+100 () fffffffffbc3ab70 unix:trap+157d () ffffff00083d7020 unix:_patch_xrstorq_rbx+196 () ffffff00083d7050 zfs:dbuf_rele+2e () ... ffffff00083d7080 zfs:dsl_dir_close+32 () ffffff00083d70b0 zfs:dsl_dir_evict+30 () ffffff00083d70d0 zfs:dbuf_evict_user+4a () ffffff00083d7100 zfs:dbuf_rele_and_unlock+87 () ffffff00083d7130 zfs:dbuf_rele+2e () ... The block above repeats once per directory in the ... ... create -p command, working towards the root ... ffffff00083db9f0 zfs:dsl_dataset_drop_ref+19 () ffffff00083dba20 zfs:dsl_dataset_rele+42 () ffffff00083dba70 zfs:dmu_objset_prefetch+e4 () ffffff00083dbaa0 zfs:findfunc+23 () ffffff00083dbb80 zfs:dmu_objset_find_spa+38c () ffffff00083dbbc0 zfs:dmu_objset_find+40 () ffffff00083dbc20 zfs:zfs_ioc_snapshot_list_next+4b () ffffff00083dbcc0 zfs:zfsdev_ioctl+347 () ffffff00083dbd00 genunix:cdev_ioctl+45 () ffffff00083dbd40 specfs:spec_ioctl+5a () ffffff00083dbdc0 genunix:fop_ioctl+7b () ffffff00083dbec0 genunix:ioctl+18e () ffffff00083dbf10 unix:brand_sys_sysenter+1c9 () Porting notes: * Added zfs_max_dataset_nesting module option with documentation. * Updated zfs_rename_014_neg.ksh for Linux. * Increase the zfs.sh stack warning to 15K. Enough time has passed that 16K can be reasonably assumed to be the default value. It was increased in the 3.15 kernel released in June of 2014. Authored by: Serapheim Dimitropoulos <[email protected]> Reviewed by: John Kennedy <[email protected]> Reviewed by: Matt Ahrens <[email protected]> Ported-by: Brian Behlendorf <[email protected]> Approved by: Garrett D'Amore <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/9330 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/757a75a Closes #7681
* Enforce PROP_ONETIME on zpool propertiesChunwei Chen2018-06-281-9/+8
| | | | | | Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Chunwei Chen <[email protected]> Closes #7661
* OpenZFS 9166 - zfs storage pool checkpointSerapheim Dimitropoulos2018-06-265-4/+139
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Details about the motivation of this feature and its usage can be found in this blogpost: https://sdimitro.github.io/post/zpool-checkpoint/ A lightning talk of this feature can be found here: https://www.youtube.com/watch?v=fPQA8K40jAM Implementation details can be found in big block comment of spa_checkpoint.c Side-changes that are relevant to this commit but not explained elsewhere: * renames members of "struct metaslab trees to be shorter without losing meaning * space_map_{alloc,truncate}() accept a block size as a parameter. The reason is that in the current state all space maps that we allocate through the DMU use a global tunable (space_map_blksz) which defauls to 4KB. This is ok for metaslab space maps in terms of bandwirdth since they are scattered all over the disk. But for other space maps this default is probably not what we want. Examples are device removal's vdev_obsolete_sm or vdev_chedkpoint_sm from this review. Both of these have a 1:1 relationship with each vdev and could benefit from a bigger block size. Porting notes: * The part of dsl_scan_sync() which handles async destroys has been moved into the new dsl_process_async_destroys() function. * Remove "VERIFY(!(flags & FWRITE))" in "kernel.c" so zhack can write to block device backed pools. * ZTS: * Fix get_txg() in zpool_sync_001_pos due to "checkpoint_txg". * Don't use large dd block sizes on /dev/urandom under Linux in checkpoint_capacity. * Adopt Delphix-OS's setting of 4 (spa_asize_inflation = SPA_DVAS_PER_BP + 1) for the checkpoint_capacity test to speed its attempts to fill the pool * Create the base and nested pools with sync=disabled to speed up the "setup" phase. * Clear labels in test pool between checkpoint tests to avoid duplicate pool issues. * The import_rewind_device_replaced test has been marked as "known to fail" for the reasons listed in its DISCLAIMER. * New module parameters: zfs_spa_discard_memory_limit, zfs_remove_max_bytes_pause (not documented - debugging only) vdev_max_ms_count (formerly metaslabs_per_vdev) vdev_min_ms_count Authored by: Serapheim Dimitropoulos <[email protected]> Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: John Kennedy <[email protected]> Reviewed by: Dan Kimmel <[email protected]> Reviewed by: Brian Behlendorf <[email protected]> Approved by: Richard Lowe <[email protected]> Ported-by: Tim Chase <[email protected]> Signed-off-by: Tim Chase <[email protected]> OpenZFS-issue: https://illumos.org/issues/9166 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/7159fdb8 Closes #7570
* Linux 4.18 compat: inode timespec -> timespec64Brian Behlendorf2018-06-195-95/+31
| | | | | | | | | | | | | | | | | | | | | | | | Commit torvalds/linux@95582b0 changes the inode i_atime, i_mtime, and i_ctime members form timespec's to timespec64's to make them 2038 safe. As part of this change the current_time() function was also updated to return the timespec64 type. Resolve this issue by introducing a new inode_timespec_t type which is defined to match the timespec type used by the inode. It should be used when working with inode timestamps to ensure matching types. The timestruc_t type under Illumos was used in a similar fashion but was specified to always be a timespec_t. Rather than incorrectly define this type all timespec_t types have been replaced by the new inode_timespec_t type. Finally, the kernel and user space 'sys/time.h' headers were aligned with each other. They define as appropriate for the context several constants as macros and include static inline implementation of gethrestime(), gethrestime_sec(), and gethrtime(). Reviewed-by: Chunwei Chen <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #7643
* Remove libefi __linux__ wrappersBrian Behlendorf2018-06-141-17/+2
| | | | | | | | | The ZoL version of libefi has been modified for Linux in several places outside the existing __linux__ wrappers. Remove them to make the code easier to read and so as not to mislead anyone that these are the sole modifications for Linux. Signed-off-by: Brian Behlendorf <[email protected]> Closes #7625
* Fix efi_get_info() zvol detectionBrian Behlendorf2018-06-131-2/+3
| | | | | | | | | | Partition detection for zvol devices was not working correctly resulting inconsistent partitioning behavior when layering pools on top of zvols. This isn't a supported configuration but we'd still like it to work properly. Reviewed-by: George Melikov <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #7624
* Wrong error message when removing log devicePaul Zuchowski2018-06-071-3/+18
| | | | | | | | | | | | | In the case where the pool is loaded without the crypto keys necessary to playback the intent log, and log device removal is attempted, a generic busy message is received. Change the message to inform the user that the datasets must be mounted. Reviewed-by: Tony Hutter <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Tom Caputi <[email protected]> Signed-off-by: Paul Zuchowski <[email protected]> Closes #7518
* OpenZFS 8484 - Implement aggregate sum and use for arc countersPaul Dagnelie2018-06-061-0/+2
| | | | | | | | | | | | | | | | | | | In pursuit of improving performance on multi-core systems, we should implements fanned out counters and use them to improve the performance of some of the arc statistics. These stats are updated extremely frequently, and can consume a significant amount of CPU time. Authored by: Paul Dagnelie <[email protected]> Reviewed by: Pavel Zakharov <[email protected]> Reviewed by: Matthew Ahrens <[email protected]> Approved by: Dan McDonald <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Ported-by: Paul Dagnelie <[email protected]> OpenZFS-issue: https://www.illumos.org/issues/8484 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/7028a8b92b7 Issue #3752 Closes #7462
* Add pool state /proc entry, "SUSPENDED" poolsTony Hutter2018-06-063-18/+42
| | | | | | | | | | | | | | | | | | | 1. Add a proc entry to display the pool's state: $ cat /proc/spl/kstat/zfs/tank/state ONLINE This is done without using the spa config locks, so it will never hang. 2. Fix 'zpool status' and 'zpool list -o health' output to print "SUSPENDED" instead of "ONLINE" for suspended pools. Reviewed-by: Olaf Faaland <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed by: Richard Elling <[email protected]> Signed-off-by: Tony Hutter <[email protected]> Closes #7331 Closes #7563
* Remove rwlock wrappersBrian Behlendorf2018-06-042-82/+0
| | | | | | | | | | | | | | | | | | | The only remaining consumer of the rwlock compatibility wrappers is ztest. Remove the wrappers and convert the few remaining calls to the underlying pthread functions. rwlock_init() -> pthread_rwlock_init() rwlock_destroy() -> pthread_rwlock_destroy() rw_rdlock() -> pthread_rwlock_rdlock() rw_wrlock() -> pthread_rwlock_wrlock() rw_unlock() -> pthread_rwlock_unlock() Note pthread_rwlock_init() defaults to PTHREAD_PROCESS_PRIVATE which is equivilant to the USYNC_THREAD behavior. There is no functional change. Reviewed-by: Olaf Faaland <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #7591
* OpenZFS 9235 - rename zpool_rewind_policy_t to zpool_load_policy_tPavel Zakharov2018-06-042-12/+12
| | | | | | | | | | | | | | | | | | | | | | | We want to be able to pass various settings during import/open of a pool, which are not only related to rewind. Instead of adding a new policy and duplicate a bunch of code, we should just rename rewind_policy to a more generic term like load_policy. For instance, we'd like to set spa->spa_import_flags from the nvlist, rather from a flags parameter passed to spa_import as in some cases we want those flags not only for the import case, but also for the open case. One such flag could be ZFS_IMPORT_MISSING_LOG (as used in zdb) which would allow zfs to open a pool when logs are missing. Authored by: Pavel Zakharov <[email protected]> Reviewed by: Matt Ahrens <[email protected]> Reviewed by: George Wilson <[email protected]> Approved by: Robert Mustacchi <[email protected]> Ported-by: Brian Behlendorf <[email protected]> OpenZFS-issue: https://illumos.org/issues/9235 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/d2b1e44 Closes #7532
* zpool reopen should detect expanded devicesSara Hartse2018-05-312-13/+21
| | | | | | | | | | | | | | | | | | | | Update bdev_capacity to have wholedisk vdevs query the size of the underlying block device (correcting for the size of the efi parition and partition alignment) and therefore detect expanded space. Correct vdev_get_stats_ex so that the expandsize is aligned to metaslab size and new space is only reported if it is large enough for a new metaslab. Reviewed by: Don Brady <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed by: George Wilson <[email protected]> Reviewed-by: Matthew Ahrens <[email protected]> Reviewed by: John Wren Kennedy <[email protected]> Signed-off-by: sara hartse <[email protected]> External-issue: LX-165 Closes #7546 Issue #7582
* Update build system and packagingBrian Behlendorf2018-05-2918-209/+47
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Minimal changes required to integrate the SPL sources in to the ZFS repository build infrastructure and packaging. Build system and packaging: * Renamed SPL_* autoconf m4 macros to ZFS_*. * Removed redundant SPL_* autoconf m4 macros. * Updated the RPM spec files to remove SPL package dependency. * The zfs package obsoletes the spl package, and the zfs-kmod package obsoletes the spl-kmod package. * The zfs-kmod-devel* packages were updated to add compatibility symlinks under /usr/src/spl-x.y.z until all dependent packages can be updated. They will be removed in a future release. * Updated copy-builtin script for in-kernel builds. * Updated DKMS package to include the spl.ko. * Updated stale AUTHORS file to include all contributors. * Updated stale COPYRIGHT and included the SPL as an exception. * Renamed README.markdown to README.md * Renamed OPENSOLARIS.LICENSE to LICENSE. * Renamed DISCLAIMER to NOTICE. Required code changes: * Removed redundant HAVE_SPL macro. * Removed _BOOT from nvpairs since it doesn't apply for Linux. * Initial header cleanup (removal of empty headers, refactoring). * Remove SPL repository clone/build from zimport.sh. * Use of DEFINE_RATELIMIT_STATE and DEFINE_SPINLOCK removed due to build issues when forcing C99 compilation. * Replaced legacy ACCESS_ONCE with READ_ONCE. * Include needed headers for `current` and `EXPORT_SYMBOL`. Reviewed-by: Tony Hutter <[email protected]> Reviewed-by: Olaf Faaland <[email protected]> Reviewed-by: Matthew Ahrens <[email protected]> Reviewed-by: Pavel Zakharov <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> TEST_ZIMPORT_SKIP="yes" Closes #7556
* OpenZFS 9075 - Improve ZFS pool import/load process and corrupted pool recoveryPavel Zakharov2018-05-083-4/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some work has been done lately to improve the debugability of the ZFS pool load (and import) process. This includes: 7638 Refactor spa_load_impl into several functions 8961 SPA load/import should tell us why it failed 7277 zdb should be able to print zfs_dbgmsg's To iterate on top of that, there's a few changes that were made to make the import process more resilient and crash free. One of the first tasks during the pool load process is to parse a config provided from userland that describes what devices the pool is composed of. A vdev tree is generated from that config, and then all the vdevs are opened. The Meta Object Set (MOS) of the pool is accessed, and several metadata objects that are necessary to load the pool are read. The exact configuration of the pool is also stored inside the MOS. Since the configuration provided from userland is external and might not accurately describe the vdev tree of the pool at the txg that is being loaded, it cannot be relied upon to safely operate the pool. For that reason, the configuration in the MOS is read early on. In the past, the two configurations were compared together and if there was a mismatch then the load process was aborted and an error was returned. The latter was a good way to ensure a pool does not get corrupted, however it made the pool load process needlessly fragile in cases where the vdev configuration changed or the userland configuration was outdated. Since the MOS is stored in 3 copies, the configuration provided by userland doesn't have to be perfect in order to read its contents. Hence, a new approach has been adopted: The pool is first opened with the untrusted userland configuration just so that the real configuration can be read from the MOS. The trusted MOS configuration is then used to generate a new vdev tree and the pool is re-opened. When the pool is opened with an untrusted configuration, writes are disabled to avoid accidentally damaging it. During reads, some sanity checks are performed on block pointers to see if each DVA points to a known vdev; when the configuration is untrusted, instead of panicking the system if those checks fail we simply avoid issuing reads to the invalid DVAs. This new two-step pool load process now allows rewinding pools accross vdev tree changes such as device replacement, addition, etc. Loading a pool from an external config file in a clustering environment also becomes much safer now since the pool will import even if the config is outdated and didn't, for instance, register a recent device addition. With this code in place, it became relatively easy to implement a long-sought-after feature: the ability to import a pool with missing top level (i.e. non-redundant) devices. Note that since this almost guarantees some loss of data, this feature is for now restricted to a read-only import. Porting notes (ZTS): * Fix 'make dist' target in zpool_import * The maximum path length allowed by tar is 99 characters. Several of the new test cases exceeded this limit resulting in them not being included in the tarball. Shorten the names slightly. * Set/get tunables using accessor functions. * Get last synced txg via the "zfs_txg_history" mechanism. * Clear zinject handlers in cleanup for import_cache_device_replaced and import_rewind_device_replaced in order that the zpool can be exported if there is an error. * Increase FILESIZE to 8G in zfs-test.sh to allow for a larger ext4 file system to be created on ZFS_DISK2. Also, there's no need to partition ZFS_DISK2 at all. The partitioning had already been disabled for multipath devices. Among other things, the partitioning steals some space from the ext4 file system, makes it difficult to accurately calculate the paramters to parted and can make some of the tests fail. * Increase FS_SIZE and FILE_SIZE in the zpool_import test configuration now that FILESIZE is larger. * Write more data in order that device evacuation take lonnger in a couple tests. * Use mkdir -p to avoid errors when the directory already exists. * Remove use of sudo in import_rewind_config_changed. Authored by: Pavel Zakharov <[email protected]> Reviewed by: George Wilson <[email protected]> Reviewed by: Matthew Ahrens <[email protected]> Reviewed by: Andrew Stormont <[email protected]> Approved by: Hans Rosenfeld <[email protected]> Ported-by: Tim Chase <[email protected]> Signed-off-by: Tim Chase <[email protected]> OpenZFS-issue: https://illumos.org/issues/9075 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/619c0123 Closes #7459
* OpenZFS 9421, 9422 - zdb show possibly leaked objectsPaul Dagnelie2018-05-041-2/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 9421 zdb should detect and print out the number of "leaked" objects 9422 zfs diff and zdb should explicitly mark objects that are on the deleted queue It is possible for zfs to "leak" objects in such a way that they are not freed, but are also not accessible via the POSIX interface. As the only way to know that this is happened is to see one of them directly in a zdb run, or by noting unaccounted space usage, zdb should be enhanced to count these objects and return failure if some are detected. We have access to the delete queue through the zfs_get_deleteq function; we should call it in dump_znode to determine if the object is on the delete queue. This is not the most efficient possible method, but it is the simplest to implement, and should suffice for the common case where there few objects on the delete queue. Also zfs diff and zdb currently traverse every single dnode in a dataset and tries to figure out the path of the object by following it's parent. When an object is placed on the delete queue, for all practical purposes it's already discarded, it's parent might not exist anymore, and another object might now have the object number that belonged to the parent. While all of the above makes sense, when trying to figure out the path of an object that is on the delete queue, we can run into issues where either it is impossible to determine the path because the parent is gone, or another dnode has taken it's place and thus we are returned a wrong path. We should therefore avoid trying to determine the path of an object on the delete queue and mark the object itself as being on the delete queue to avoid confusion. To achieve this, we currently have two ideas: 1. When putting an object on the delete queue, change it's parent object number to a known constant that means NULL. 2. When displaying objects, first check if it is present on the delete queue. Authored by: Paul Dagnelie <[email protected]> Reviewed by: Matt Ahrens <[email protected]> Reviewed by: Pavel Zakharov <[email protected]> Approved by: Matt Ahrens <[email protected]> Ported-by: Brian Behlendorf <[email protected]> OpenZFS-issue: https://illumos.org/issues/9421 OpenZFS-issue: https://illumos.org/issues/9422 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/45ae0dd9ca Closes #7500
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