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249326,249356-249357 Merge libzfs_core and other ZFS bugfixes and improvements. MFC r248571: MFV 238590, 238592: In the first zfs ioctl restructuring phase, the libzfs_core library was introduced. It is a new thin library that wraps around kernel ioctl's. The idea is to provide a forward-compatible way of dealing with new features. Arguments are passed in nvlists and not random zfs_cmd fields, new-style ioctls are logged to pool history using a new method of history logging. http://blog.delphix.com/matt/2012/01/17/the-future-of-libzfs/ MFV 247580 [1]: To address issues of several deadlocks and race conditions the locking code around dsl_dataset was rewritten and the interface to synctasks was changed. User-Visible Changes: "zfs snapshot" can create more arbitrary snapshots at once (atomically) "zfs destroy" destroys multiple snapshots at once "zfs recv" has improved performance Backward Compatibility: I have extended the compatibility layer to support full backward compatibility by remapping or rewriting the responsible ioctl arguments. Old utilities are fully supported by the new kernel module. Forward Compatibility: New utilities work with old kernels with the following restrictions: - creating, destroying, holding and releasing of multiple snapshots at once is not supported, this includes recursive (-r) commands Illumos ZFS issues: 2882 implement libzfs_core 2900 "zfs snapshot" should be able to create multiple, arbitrary snapshots at once 3464 zfs synctask code needs restructuring MFC r248976: Call dmu_snapshot_list_next() in zvol.c with dsl_pool_config lock held MFC r249004: Do not check against uninitialized rc and comment out vendor code MFC r249042: Fix possible pool hold leak in dmu_send_impl() Illumos ZFS issues: 3645 dmu_send_impl: possibilty of pool hold leak MFC r249188: Import vendor change to reduce diff, no effect on FreeBSD. Illumos ZFS issues: 3517 importing pool with autoreplace=on and "hole" vdevs crashes syseventd MFC r249195: Merge change from vendor to reduce diff only. ZFS dtrace probes are not supported on FreeBSD yet. Illumos ZFS issues: 3598 want to dtrace when errors are generated in zfs MFC r249196: Provide a fix for kernel panic if receiving recursive deduplicated streams. Problem reported to vendor. Illumos ZFS issues: 3692 Panic on zfs receive of a recursive deduplicated stream MFC r249206: Merge vendor change - modify time processing in deadman thread. Illumos ZFS issues: 3618 ::zio dcmd does not show timestamp data MFC r249207: Allow zdb to output a histogram of compressed block sizes. Illumos ZFS issues: 3641 want a histogram of compressed block sizes MFC r249319: ZFS expects a copyout of zfs_cmd_t on an ioctl error. Our sys_ioctl() doesn't copyout in this case. To solve this a new struct zfs_iocparm_t is introduced consisting of: - zfs_ioctl_version (future backwards compatibility purposes) - user space pointer to zfs_cmd_t (copyin and copyout) - size of zfs_cmd_t (verification purposes) The copyin and copyout of zfs_cmd_t is now done the illumos (vendor) way what makes porting of new changes easier and ensures correct behavior if returning an error. MFC r249326: Cast (void *)(uintptr_t) on copyout and copyin of zfs_iocparm_t.zfs_cmd MFC r249356: Merge bugfixes accepted and integrated by vendor. Underlying problems have been reported by us and fixed in r240942 and r249196. Illumos ZFS issues: 3645 dmu_send_impl: possibilty of pool hold leak 3692 Panic on zfs receive of a recursive deduplicated stream MFC r249357: Fix libzfs to report error instead of returning zero if trying to hold or release a non-existing snapshot of a existing dataset. In recursive case error is reported if no snapshots with the requested name have been found. Illumos ZFS issues: 3699 zfs hold or release of a non-existent snapshot does not output error |
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