When a ZFS drive disappears, ZFS sends a resource.fs.zfs.removed event to
userland. A userland program like zfsd(8) can use that event, for example to
activate a hotspare. The current code contains a race condition: vdev_geom
will sent the sysevent _before_ spa.c would update the vdev's status,
causing userland processes to see pool state that does not reflect the
device removal. This change moves the sysevent to spa.c, closing the race.
Reviewed by: delphij, Sean Eric Fagan
MFC after: 4 weeks
Sponsored by: Spectra Logic Corp
Differential Revision: https://reviews.freebsd.org/D4902
After r292066, vdev_geom verifies both the vdev and pool guids of device
labels during open. However, spare and l2arc devices don't have pool guids,
so opening them by guid will fail (opening by path, when the pathname is
known, still succeeds). This change allows a vdev to be opened by guid if
the label contains no pool_guid, which is the case for inactive spares and
l2arc devices.
PR: 292066
Reported by: delphij
Reviewed by: delphij, smh
MFC after: 2 weeks
Sponsored by: Spectra Logic Corp
Differential Revision: https://reviews.freebsd.org/D4861
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c:
If available, record the physical path of a vdev in ZFS meta-data.
Do this both when opening the vdev, and when receiving an attribute
change notification from GEOM.
Make vdev_geom_close() synchronous instead of deferring its work to
a GEOM event handler. There is no benefit to deferring the work and
this prevents a future open call from referencing a consumer that is
scheduled for destruction. The close followed by an immediate open
will occur during a vdev reprobe triggered by any type of I/O error.
Consolidate vdev_geom_close() and vdev_geom_detach() into
vdev_geom_close() and vdev_geom_close_locked(). This also moves the
cross linking operations between vdev and GEOM consumer into a
single place (linking in vdev_geom_attach() and unlinking in
vdev_geom_close_locked()).
Submitted by: gibbs, asomers
MFC after: 4 weeks
Sponsored by: Spectra Logic Corp
Differential Revision: https://reviews.freebsd.org/D4524
cperciva's libmd implementation is 5-30% faster
The same was done for SHA256 previously in r263218
cperciva's implementation was lacking SHA-384 which I implemented, validated against OpenSSL and the NIST documentation
Extend sbin/md5 to create sha384(1)
Chase dependancies on sys/crypto/sha2/sha2.{c,h} and replace them with sha512{c.c,.h}
Reviewed by: cperciva, des, delphij
Approved by: secteam, bapt (mentor)
MFC after: 2 weeks
Sponsored by: ScaleEngine Inc.
Differential Revision: https://reviews.freebsd.org/D3929
With the new VOP_GETPAGES() KPI the "count" argument counts pages already,
and doesn't need to be translated from bytes to pages.
While here make it consistent that *rbehind and *rahead are updated only
if we doesn't return error.
Pointy hat to: glebius
o With new KPI consumers can request contiguous ranges of pages, and
unlike before, all pages will be kept busied on return, like it was
done before with the 'reqpage' only. Now the reqpage goes away. With
new interface it is easier to implement code protected from race
conditions.
Such arrayed requests for now should be preceeded by a call to
vm_pager_haspage() to make sure that request is possible. This
could be improved later, making vm_pager_haspage() obsolete.
Strenghtening the promises on the business of the array of pages
allows us to remove such hacks as swp_pager_free_nrpage() and
vm_pager_free_nonreq().
o New KPI accepts two integer pointers that may optionally point at
values for read ahead and read behind, that a pager may do, if it
can. These pages are completely owned by pager, and not controlled
by the caller.
This shifts the UFS-specific readahead logic from vm_fault.c, which
should be file system agnostic, into vnode_pager.c. It also removes
one VOP_BMAP() request per hard fault.
Discussed with: kib, alc, jeff, scottl
Sponsored by: Nginx, Inc.
Sponsored by: Netflix
except during split, add, or create operations. This fixes a bug where the
wrong disk could be returned, and higher layers of ZFS would immediately
eject it again.
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c:
o When opening by GUID, require both the pool and vdev GUIDs to
match. While it is highly unlikely for two vdevs to have the same
vdev GUIDs, the ZFS storage pool allocator only guarantees they
are unique within a pool.
o Modify the open behavior to:
- If we are opening a vdev that hasn't previously been opened,
open by path without checking GUIDs.
- Otherwise, open by path and verify GUIDs.
- If that fails, search all geom providers for a device with
matching GUIDs.
- If that fails, return ENOENT.
Submitted by: gibbs, asomers
Reviewed by: smh
MFC after: 4 weeks
Sponsored by: Spectra Logic Corp
Differential Revision: https://reviews.freebsd.org/D4486
r281257 added support for lazyload mode by allowing dtrace(1) to register
a DOF section on behalf of a traced process. This was implemented by
having libdtrace copy the DOF section into a heap-allocated buffer and
passing its address to the ioctl handler. However, DTrace uses the DOF
section address as a lookup key in certain cases, so the ioctl handler
should be given the target process' DOF section address instead. This
change modifies the ADDDOF handler to copy the DOF section in from the
target process, rather than from dtrace(1).
These helper functions can be used to read in or write a buffer from or to
an arbitrary process' address space. Without them, this can only be done
using proc_rwmem(), which requires the caller to fill out a uio. This is
onerous and results in code duplication; the new functions provide a simpler
interface which is sufficient for most existing callers of proc_rwmem().
This change also adds a manual page for proc_rwmem() and the new functions.
Reviewed by: jhb, kib
Differential Revision: https://reviews.freebsd.org/D4245
tunable via sysctl or kernel tunables.
Illumos allows this parameters to be changed via the fasttrap.conf configuration
file, but FreeBSD code hardcoded the parameters. Expose them under
the kern.dtrace.fasttrap sysctl tree.
MFC after: 2 weeks
As reported by Coverity a null pointer de-reference panic would be triggered
when zfs_recover was set so switch to straight panic as it can never be
recovered.
Reported by: Coverity Scan
MFC after: 1
X-MFC-With: r290401
Sponsored by: Multiplay
wrong value in the comparison, leading to incorrectly setting the new
value.
This has been observed in the ZFS code. Without this we can lose track of
the reference count in a zrlock object.
We should move to use the generic atomic functions, however as this has
been observed I would prefer to have this working, then move to the generic
functions.
PR: 204037
Sponsored by: ABT Systems Ltd
b_asize can be zero if the block is compressed into an empty block
(ZIO_COMPRESS_EMPTY) and the trim code asserts that meaningless
zero-sized trimming is not attempted.
The logic for calling trim_map_free() is extracted into a new function
l2arc_trim() to minimize code duplication.
PR: 203473
Reported by: Willem Jan Withagen <wjw@digiware.nl>
Tested by: Willem Jan Withagen <wjw@digiware.nl>
MFC after: 11 days
5561 support root pools on EFI/GPT partitioned disks
5125 update zpool/libzfs to manage bootable whole disk pools (EFI/GPT labeled disks)
Reviewed by: Jean McCormack <jean.mccormack@nexenta.com>
Reviewed by: Josef 'Jeff' Sipek <josef.sipek@nexenta.com>
Approved by: Dan McDonald <danmcd@omniti.com>
Author: Hans Rosenfeld <hans.rosenfeld@nexenta.com>
illumos/illumos-gate@1a902ef862
This is NOP changes for FreeBSD.
4185 add new cryptographic checksums to ZFS: SHA-512, Skein, Edon-R
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Prakash Surya <prakash.surya@delphix.com>
Reviewed by: Saso Kiselkov <saso.kiselkov@nexenta.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Approved by: Garrett D'Amore <garrett@damore.org>
Author: Matthew Ahrens <mahrens@delphix.com>
illumos/illumos-gate@45818ee124
This is only a partial merge of respective ZFS infrastructure changes.
At this moment FreeBSD kernel has no those crypto algorithms, so the
parts of the code to enable them are commented out. When they are
implemented, it will be trivial to plug them in.
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Paul Dagnelie <pcd@delphix.com>
Reviewed by: Richard Elling <Richard.Elling@RichardElling.com>
Reviewed by: Xin Li <delphij@freebsd.org>
Reviewed by: Arne Jansen <sensille@gmx.net>
Approved by: Dan McDonald <danmcd@omniti.com>
Author: Matthew Ahrens <mahrens@delphix.com>
illumos/illumos-gate@9c3fd1216f
For more info, see:
- slides http://www.slideshare.net/MatthewAhrens/openzfs-send-and-receive
- video https://www.youtube.com/watch?v=iY44jPMvxog
- manpage changes (for zfs resume -s and zfs send -t)
- upcoming talk at the OpenZFS Developer Summit
The TL;DR is:
Use "zfs receive -s" to save the partially received state on failure.
On failure, get the receive token with "zfs get receive_resume_token <fs>"
Resume the send with "zfs send -t <token_value>"
Relnotes: yes
Reviewed by: Richard Yao <ryao@gentoo.org>
Reviewed by: Xin LI <delphij@freebsd.org>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Approved by: Richard Lowe <richlowe@richlowe.net>
Author: Justin T. Gibbs <gibbs@FreeBSD.org>
illumos/illumos-gate@d2058105c6
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Prakash Surya <prakash.surya@delphix.com>
Reviewed by: Richard Elling <Richard.Elling@RichardElling.com>
Approved by: Richard Lowe <richlowe@richlowe.net>
Author: Matthew Ahrens <mahrens@delphix.com>
illumos/illumos-gate@8fe00bfb87
Reviewed by: Paul Dagnelie <pcd@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Andriy Gapon <avg@FreeBSD.org>
Approved by: Robert Mustacchi <rm@joyent.com>
Author: Matthew Ahrens <mahrens@delphix.com>
illumos/illumos-gate@6de9bb5603
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Paul Dagnelie <pcd@delphix.com>
Reviewed by: Justin Gibbs <gibbs@scsiguy.com>
Reviewed by: Richard Elling <Richard.Elling@RichardElling.com>
Approved by: Robert Mustacchi <rm@joyent.com>
Author: Matthew Ahrens <mahrens@delphix.com>
illumos/illumos-gate@0f2e7d03b8
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Paul Dagnelie <pcd@delphix.com>
Reviewed by: Alexander Motin <mav@freebsd.org>
Reviewed by: Dan McDonald <danmcd@omniti.com>
Reviewed by: Justin Gibbs <gibbs@scsiguy.com>
Reviewed by: Xin Li <delphij@freebsd.org>
Approved by: Gordon Ross <gordon.ross@nexenta.com>
Author: George Wilson <george.wilson@delphix.com>
illumos/illumos-gate@632802744e
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Prakash Surya <prakash.surya@delphix.com>
Reviewed by: Simon Klinkert <simon.klinkert@gmail.com>
Reviewed by: Richard Elling <Richard.Elling@RichardElling.com>
Reviewed by: Albert Lee <trisk@omniti.com>
Reviewed by: Xin Li <delphij@freebsd.org>
Approved by: Garrett D'Amore <garrett@damore.org>
Author: George Wilson <george.wilson@delphix.com>
illumos/illumos-gate@139510fb6e
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Prakash Surya <prakash.surya@delphix.com>
Reviewed by: Albert Lee <trisk@omniti.com>
Reviewed by: Xin Li <delphij@freebsd.org>
Approved by: Garrett D'Amore <garrett@damore.org>
Author: George Wilson <george.wilson@delphix.com>
illumos/illumos-gate@b10bba7246
Before r278702 prefetch was blocked for I/Os > 1MB, after -- >= 1MB.
1MB I/Os are used for bulk operations in CTL (XCOPY, VERIFY), and disabling
prefetch for them reduced the performance.
This is temporary local patch, that should be replaced when upstreamed.
Discussed with: mahrens
MFC after: 3 days
A change to a property on a dataset must be propagated to its descendants
in case that property is inherited. For datasets whose information is
not currently loaded into memory (e.g. a snapshot that isn't currently
mounted), there is nothing to do; the property change will take effect
the next time that dataset is loaded. To handle updates to datasets that
are in-core, ZFS registers a callback entry for each property of each
loaded dataset with the dsl directory that holds that dataset. There
is a dsl directory associated with each live dataset that references
both the live dataset and any snapshots of the live dataset. A property
change is effected by doing a traversal of the tree of dsl directories
for a pool, starting at the directory sourcing the change, and invoking
these callbacks.
The current implementation both registers and de-registers properties
individually for each loaded dataset. While registration for a property is
O(1) (insert into a list), de-registration is O(n) (search list and then
remove). The 'n' for de-registration, however, is not limited to the size
(number of snapshots + 1) of the dsl directory. The eviction portion
of the life cycle for the in core state of datasets is asynchronous,
which allows multiple copies of the dataset information to be in-core
at once. Only one of these copies is active at any time with the rest
going through tear down processing, but all copies contribute to the
cost of performing a dsl_prop_unregister().
One way to create multiple, in-flight copies of dataset information
is by performing "zfs list" operations from multiple threads
concurrently. In-core dataset information is loaded on demand and then
evicted when reference counts drops to zero. For datasets that are not
mounted, there is no persistent reference count to keep them resident.
So, a list operation will load them, compute the information required to
do the list operation, and then evict them. When performing this operation
from multiple threads it is possible that some of the in-core dataset
information will be reused, but also possible to lose the race and load
the dataset again, even while the same information is being torn down.
Compounding the performance issue further is a change made for illumos
issue 5056 which made dataset eviction single threaded. In environments
using automation to manage ZFS datasets, it is now possible to create
enough of a backlog of dataset evictions to consume excessive amounts
of kernel memory and to bog down the system.
The fix employed here is to make property de-registration O(1). With this
change in place, it is hoped that a single thread is more than sufficient
to handle eviction processing. If it isn't, the problem can be solved
by increasing the number of threads devoted to the eviction taskq.
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dir.c:
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_prop.c:
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dsl_dataset.h:
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dsl_dir.h:
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dsl_prop.h:
Associate dsl property callback records with both the
dsl directory and the dsl dataset that is registering the
callback. Both connections are protected by the dsl directory's
"dd_lock".
When linking callbacks into a dsl directory, group them by
the property type. This helps reduce the space penalty for the
double association (the property name pointer is stored once
per dsl_dir instead of in each record) and reduces the number of
strcmp() calls required to do callback processing when updating
a single property. Property types are stored in a linked list
since currently ZFS registers a maximum of 10 property types
for each dataset.
Note that the property buckets/records associated with a dsl
directory are created on demand, but only freed when the dsl
directory is freed. Given the static nature of property types
and their small number, there is no benefit to freeing the few
bytes of memory used to represent the property record earlier.
When a property record becomes empty, the dsl directory is either
going to become unreferenced a little later in this thread of
execution, or there is a high chance that another dataset is
going to be loaded that would recreate the bucket anyway.
Replace dsl_prop_unregister() with dsl_prop_unregister_all().
All callers of dsl_prop_unregister() are trying to remove
all property registrations for a given dsl dataset anyway. By
changing the API, we can avoid doing any lookups of callbacks
by property type and just traverse the list of all callbacks
for the dataset and free each one.
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_objset.c:
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c:
Replace use of dsl_prop_unregister() with the new
dsl_prop_unregister_all() API.
illumos/illumos-gate@03bad06fbb
Author: Justin Gibbs <gibbs@scsiguy.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Prakash Surya <prakash.surya@delphix.com>
Approved by: Dan McDonald <danmcd@omniti.com>
Illumos issue:
6171 dsl_prop_unregister() slows down dataset eviction
https://www.illumos.org/issues/6171
MFC after: 2 weeks
c546f36aa8https://www.illumos.org/issues/6220
5408 introduced a memleak in l2arc, namely the member b_thawed gets leaked when
an arc_hdr is realloced from full to l2only.
Reviewed by: Saso Kiselkov <saso.kiselkov@nexenta.com>
Reviewed by: Simon Klinkert <simon.klinkert@gmail.com>
Reviewed by: George Wilson <george@delphix.com>
Approved by: Robert Mustacchi <rm@joyent.com>
Author: Arne Jansen <sensille@gmx.net>
updated
ZFS already supports storing the vdev FRU in a vdev property. There
is code in libzfs to work with this property, and there is code in
the zfs-retire FMA module that looks for that information. But there
is no code actually setting or updating the FRU.
To address this, ZFS is changed to send a handful of new events
whenever a vdev is added, attached, cleared, or onlined, as well
as when a pool is created or imported.
Note that syseventd is not currently available on FreeBSD and thus
some work is needed to actually support the new ZFS events (e.g. in
zfsd) to actually use this capability, this changeset is mostly a
diff reduction from upstream.
illumos/illumos-gate@1437283407
Illumos issues:
5997 FRU field not set during pool creation and never updated
https://www.illumos.org/issues/5997
In r286570 (MFV of r277426) an unprotected write to b_flags to
set the compression mode was introduced. This would open a race
window where data is partially decompressed, modified, checksummed
and written to the pool, resulting in pool corruption due to the
partial decompression.
Prevent this by reintroducing b_compress
illumos/illumos-gate@d4cd038c92
Illumos issues:
6214 zpools going south
https://www.illumos.org/issues/6214
Rewrite the ZFS prefetch code to detect only forward, sequential
streams.
The following kstats have been added:
kstat.zfs.misc.arcstats.sync_wait_for_async
How many sync reads have waited for async read
to complete. (less is better)
kstat.zfs.misc.arcstats.demand_hit_predictive_prefetch
How many demand read didn't have to wait for I/O
because of predictive prefetch. (more is better)
zfetch kstats have been similified to hits, misses, and max_streams,
with max_streams representing times when we were not able to create
new stream because we already have the maximum number of sequences
for a file.
The sysctl variable/loader tunable vfs.zfs.zfetch.block_cap have been
replaced by vfs.zfs.zfetch.max_distance, which controls maximum bytes
to prefetch per stream.
illumos/illumos-gate@cf6106c8a0
Illumos ZFS issues:
5987 zfs prefetch code needs work
https://www.illumos.org/issues/5987
5930 fasttrap_pid_enable() panics when prfind() fails in forking process
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Gordon Ross <gordon.ross@nexenta.com>
Approved by: Richard Lowe <richlowe@richlowe.net>
Author: Bryan Cantrill <bryan@joyent.com>
illumos/illumos-gate@9df7e4e12e
This makes it possible to analyze the performance of the new ZFS
write throttle with dtrace
PR: 200316
Submitted by: Lacey Powers <lacey.leanne@gmail.com>
Reviewed by: avg, smh, delphij (no objection)
Approved by: bapt (mentor)
MFC after: 1 month
Sponsored by: ScaleEngine Inc.
Differential Revision: https://reviews.freebsd.org/D3472
r286951 by reinstating changes in r274628.
In l2arc_compress_buf(), we allocate a buffer to stash away the compressed
data in 'cdata', allocated of l2hdr->b_asize bytes.
We then ask zio_compress_data() to compress the buffer, b_l1hdr.b_tmp_cdata,
which is of l2hdr->b_asize bytes, and have the compressed size (or original
size, if compress didn't gain enough) stored in csize.
To pad the buffer to fit the optimal write size, we round up the compressed
size to L2 device's vdev_ashift.
Illumos code rounds up the size by at most SPA_MINBLOCKSIZE. Because we
know csize <= b_asize, and b_asize is integer multiple of SPA_MINBLOCKSIZE,
we are guaranteed that the rounded up csize would be <= b_asize. However,
this is not necessarily true when we round up to 1 << vdev_ashift, because
it could be larger than SPA_MINBLOCKSIZE.
So, in the worst case scenario, we are overwriting at most
(1 << vdev_ashift - SPA_MINBLOCKSIZE)
bytes of memory next to the compressed data buffer.
Andriy's original change in r274628 reorganized the code a little bit,
by moving the padding to after we determined that the compression was
beneficial. At which point, we would check rounded size against the
allocated buffer size, and the buffer overrun would not be possible.
as parent. In the case of a send or receive, the curproc would be the
userland application that issues the ioctl. This would trigger an assertion
failure introduced in Solaris compatibility shims in r196458 when kernel is
compiled with INVARIANTS.
Fix this by using p0 (proc0 or kernel) as the parent thread when creating
the kernel threads.
FreeBSD porting notes:
- only kernel-side changes are merged
- the new ioctl is not actually implemented yet
- thus, the goal is to synchronize DMU code
illumos/illumos-gate@2bcf0248e9https://www.illumos.org/issues/5692
we would like to expose the number of hole (sparse) blocks in a file.
this can be useful to for example if you want to fill in the holes with
some data; knowing the number of holes in advances allows you to report
progress on hole filling. We could use SEEK_HOLE to do that but it would
be O(n) where n is the number of holes present in the file.
Author: Max Grossman <max.grossman@delphix.com>
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Boris Protopopov <bprotopopov@hotmail.com>
Approved by: Richard Lowe <richlowe@richlowe.net>
