Fix some spelling mistakes in comments:
enconding ==> encoding
ambigous ==> ambiguous
orignal ==> original
encyption ==> encryption
Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Modify "inital" to "initial" in net/ceph/osdmap.c.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Lu Wei <luwei32@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In preparation for msgr2, make the cluster send us maps with addrvecs
including both LEGACY and MSGR2 addrs instead of a single LEGACY addr.
This means advertising support for SERVER_NAUTILUS and also some older
features: SERVER_MIMIC, MONENC and MONNAMES.
MONNAMES and MONENC are actually pre-argonaut, we just never updated
ceph_monmap_decode() for them. Decoding is unconditional, see commit
23c625ce30 ("libceph: assume argonaut on the server side").
SERVER_MIMIC doesn't bear any meaning for the kernel client.
Since ceph_decode_entity_addrvec() is guarded by encoding version
checks (and in msgr2 case it is guarded implicitly by the fact that
server is speaking msgr2), we assume MSG_ADDR2 for it.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Replace a global map->crush_workspace (protected by a global mutex)
with a list of workspaces, up to the number of CPUs + 1.
This is based on a patch from Robin Geuze <robing@nl.team.blue>.
Robin and his team have observed a 10-20% increase in IOPS on all
queue depths and lower CPU usage as well on a high-end all-NVMe
100GbE cluster.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
OSD-side issues with reads from replica have been resolved in
Octopus. Reading from replica should be safe wrt. unstable or
uncommitted state now, so add support for balanced and localized
reads.
There are two cases when a read from replica can't be served:
- OSD may silently drop the request, expecting the client to
notice that the acting set has changed and resend via the usual
means (handled with t->used_replica)
- OSD may return EAGAIN, expecting the client to resend to the
primary, ignoring replica read flags (see handle_reply())
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Allow expressing client's location in terms of CRUSH hierarchy as
a set of (bucket type name, bucket name) pairs. The userspace syntax
"crush_location = key1=value1 key2=value2" is incompatible with mount
options and needed adaptation. Key-value pairs are separated by '|'
and we use ':' instead of '=' to separate keys from values. So for:
crush_location = host=foo rack=bar
one would write:
crush_location=host:foo|rack:bar
As in userspace, "multipath" locations are supported, so indicating
locality for parallel hierarchies is possible:
crush_location=rack:foo1|rack:foo2|datacenter:bar
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
These would be matched with the provided client location to calculate
the locality value.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Needed for the next commit and useful for ceph_pg_pool_info tree as
well. I'm leaving the asserting helper in for now, but we should look
at getting rid of it in the future.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
CEPH_OSDMAP_FULL/NEARFULL aren't set since mimic, so we need to consult
per-pool flags as well. Unfortunately the backwards compatibility here
is lacking:
- the change that deprecated OSDMAP_FULL/NEARFULL went into mimic, but
was guarded by require_osd_release >= RELEASE_LUMINOUS
- it was subsequently backported to luminous in v12.2.2, but that makes
no difference to clients that only check OSDMAP_FULL/NEARFULL because
require_osd_release is not client-facing -- it is for OSDs
Since all kernels are affected, the best we can do here is just start
checking both map flags and pool flags and send that to stable.
These checks are best effort, so take osdc->lock and look up pool flags
just once. Remove the FIXME, since filesystem quotas are checked above
and RADOS quotas are reflected in POOL_FLAG_FULL: when the pool reaches
its quota, both POOL_FLAG_FULL and POOL_FLAG_FULL_QUOTA are set.
Cc: stable@vger.kernel.org
Reported-by: Yanhu Cao <gmayyyha@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Acked-by: Sage Weil <sage@redhat.com>
osdmap has a bunch of arrays that grow linearly with the number of
OSDs. osd_state, osd_weight and osd_primary_affinity take 4 bytes per
OSD. osd_addr takes 136 bytes per OSD because of sockaddr_storage.
The CRUSH workspace area also grows linearly with the number of OSDs.
Normally these arrays are allocated at client startup. The osdmap is
usually updated in small incrementals, but once in a while a full map
may need to be processed. For a cluster with 10000 OSDs, this means
a bunch of 40K allocations followed by a 1.3M allocation, all of which
are currently required to be physically contiguous. This results in
sporadic ENOMEM errors, hanging the client.
Go back to manually (re)allocating arrays and use ceph_kvmalloc() to
fall back to non-contiguous allocation when necessary.
Link: https://tracker.ceph.com/issues/40481
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Given the new format, we have to decode the addresses twice. Once to
skip past the new_up_client field, and a second time to collect the
addresses.
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
One of the more common cases of allocation size calculations is finding
the size of a structure that has a zero-sized array at the end, along
with memory for some number of elements for that array. For example:
struct foo {
int stuff;
struct boo entry[];
};
instance = kmalloc(sizeof(struct foo) + count * sizeof(struct boo), GFP_KERNEL);
Instead of leaving these open-coded and prone to type mistakes, we can
now use the new struct_size() helper:
instance = kmalloc(struct_size(instance, entry, count), GFP_KERNEL);
This code was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
requests are aborted, improving CephFS ENOSPC handling and making
"umount -f" actually work (Zheng and myself). The rest is mostly
mount option handling cleanups from Chengguang and assorted fixes
from Zheng, Luis and Dongsheng.
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Merge tag 'ceph-for-4.18-rc1' of git://github.com/ceph/ceph-client
Pull ceph updates from Ilya Dryomov:
"The main piece is a set of libceph changes that revamps how OSD
requests are aborted, improving CephFS ENOSPC handling and making
"umount -f" actually work (Zheng and myself).
The rest is mostly mount option handling cleanups from Chengguang and
assorted fixes from Zheng, Luis and Dongsheng.
* tag 'ceph-for-4.18-rc1' of git://github.com/ceph/ceph-client: (31 commits)
rbd: flush rbd_dev->watch_dwork after watch is unregistered
ceph: update description of some mount options
ceph: show ino32 if the value is different with default
ceph: strengthen rsize/wsize/readdir_max_bytes validation
ceph: fix alignment of rasize
ceph: fix use-after-free in ceph_statfs()
ceph: prevent i_version from going back
ceph: fix wrong check for the case of updating link count
libceph: allocate the locator string with GFP_NOFAIL
libceph: make abort_on_full a per-osdc setting
libceph: don't abort reads in ceph_osdc_abort_on_full()
libceph: avoid a use-after-free during map check
libceph: don't warn if req->r_abort_on_full is set
libceph: use for_each_request() in ceph_osdc_abort_on_full()
libceph: defer __complete_request() to a workqueue
libceph: move more code into __complete_request()
libceph: no need to call flush_workqueue() before destruction
ceph: flush pending works before shutdown super
ceph: abort osd requests on force umount
libceph: introduce ceph_osdc_abort_requests()
...
calc_target() isn't supposed to fail with anything but POOL_DNE, in
which case we report that the pool doesn't exist and fail the request
with -ENOENT. Doing this for -ENOMEM is at the very least confusing
and also harmful -- as the preceding requests complete, a short-lived
locator string allocation is likely to succeed after a wait.
(We used to call ceph_object_locator_to_pg() for a pi lookup. In
theory that could fail with -ENOENT, hence the "ret != -ENOENT" warning
being removed.)
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
- make it void
- xlen (object extent length) out parameter should be u32 because only
a single stripe unit is mapped at a time
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
bl, stripeno and objsetno should be u64 -- otherwise large enough files
get corrupted. How large depends on file layout:
- 4M-objects layout (default): any file over 16P
- 64K-objects layout (smallest possible object size): any file over 512T
Only CephFS is affected, rbd doesn't use ceph_calc_file_object_mapping()
yet. Fortunately, CephFS has a max_file_size configurable, the default
for which is way below both of the above numbers.
Reimplement the logic from scratch with no layout validation -- it's
done on the MDS side.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.
By default all files without license information are under the default
license of the kernel, which is GPL version 2.
Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.
How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,
Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.
The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.
The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.
Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers to apply.
- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.
For non */uapi/* files that summary was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139
and resulted in the first patch in this series.
If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930
and resulted in the second patch in this series.
- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:
SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1
and that resulted in the third patch in this series.
- when the two scanners agreed on the detected license(s), that became
the concluded license(s).
- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.
- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).
- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.
- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.
In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This reverts most of commit f53b7665c8 ("libceph: upmap semantic
changes").
We need to prevent duplicates in the final result. For example, we
can currently take
[1,2,3] and apply [(1,2)] and get [2,2,3]
or
[1,2,3] and apply [(3,2)] and get [1,2,2]
The rest of the system is not prepared to handle duplicates in the
result set like this.
The reverted piece was intended to allow
[1,2,3] and [(1,2),(2,1)] to get [2,1,3]
to reorder primaries. First, this bidirectional swap is hard to
implement in a way that also prevents dups. For example, [1,2,3] and
[(1,4),(2,3),(3,4)] would give [4,3,4] but would we just drop the last
step we'd have [4,3,3] which is also invalid, etc. Simpler to just not
handle bidirectional swaps. In practice, they are not needed: if you
just want to choose a different primary then use primary_affinity, or
pg_upmap (not pg_upmap_items).
Cc: stable@vger.kernel.org # 4.13
Link: http://tracker.ceph.com/issues/21410
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Sage Weil <sage@redhat.com>
This is needed so that the OSDs can regenerate the missing set at the
start of a new interval where support for recovery deletes changed.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Sage Weil <sage@redhat.com>
- apply both pg_upmap and pg_upmap_items
- allow bidirectional swap of pg-upmap-items
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Sage Weil <sage@redhat.com>
There is now a fallback to a choose_arg index of -1 if there isn't
a pool-specific choose_arg set. If you create a per-pool weight-set,
that works for that pool. Otherwise we try the compat/default one. If
that doesn't exist either, then we use the normal CRUSH weights.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Sage Weil <sage@redhat.com>
... otherwise we die in insert_pg_mapping(), which wants pg->node to be
empty, i.e. initialized with RB_CLEAR_NODE.
Fixes: 6f428df47d ("libceph: pg_upmap[_items] infrastructure")
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
No sooner than Dan had fixed this issue in commit 293dffaad8
("libceph: NULL deref on crush_decode() error path"), I brought it
back. Add a new label and set -EINVAL once, right before failing.
Fixes: 278b1d709c ("libceph: ceph_decode_skip_* helpers")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
There are hidden gotos in the ceph_decode_* macros. We need to set the
"err" variable on these error paths otherwise we end up returning
ERR_PTR(0) which is NULL. It causes NULL dereferences in the callers.
Fixes: 6f428df47d ("libceph: pg_upmap[_items] infrastructure")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
[idryomov@gmail.com: similar bug in osdmap_decode(), changelog tweak]
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
If there is no crush_choose_arg_map for a given pool, a NULL pointer is
passed to preserve existing crush_do_rule() behavior.
Reflects ceph.git commits 55fb91d64071552ea1bc65ab4ea84d3c8b73ab4b,
dbe36e08be00c6519a8c89718dd47b0219c20516.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
bucket_straw2_choose needs to use weights that may be different from
weight_items. For instance to compensate for an uneven distribution
caused by a low number of values. Or to fix the probability biais
introduced by conditional probabilities (see
http://tracker.ceph.com/issues/15653 for more information).
We introduce a weight_set for each straw2 bucket to set the desired
weight for a given item at a given position. The weight of a given item
when picking the first replica (first position) may be different from
the weight the second replica (second position). For instance the weight
matrix for a given bucket containing items 3, 7 and 13 could be as
follows:
position 0 position 1
item 3 0x10000 0x100000
item 7 0x40000 0x10000
item 13 0x40000 0x10000
When crush_do_rule picks the first of two replicas (position 0), item 7,
3 are four times more likely to be choosen by bucket_straw2_choose than
item 13. When choosing the second replica (position 1), item 3 is ten
times more likely to be choosen than item 7, 13.
By default the weight_set of each bucket exactly matches the content of
item_weights for each position to ensure backward compatibility.
bucket_straw2_choose compares items by using their id. The same ids are
also used to index buckets and they must be unique. For each item in a
bucket an array of ids can be provided for placement purposes and they
are used instead of the ids. If no replacement ids are provided, the
legacy behavior is preserved.
Reflects ceph.git commit 19537a450fd5c5a0bb8b7830947507a76db2ceca.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Previously, pg_to_raw_osds() didn't filter for existent OSDs because
raw_to_up_osds() would filter for "up" ("up" is predicated on "exists")
and raw_to_up_osds() was called directly after pg_to_raw_osds(). Now,
with apply_upmap() call in there, nonexistent OSDs in pg_to_raw_osds()
output can affect apply_upmap(). Introduce remove_nonexistent_osds()
to deal with that.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Move raw_pg_to_pg() call out of get_temp_osds() and into
ceph_pg_to_up_acting_osds(), for upcoming apply_upmap().
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
pg_temp and pg_upmap encodings are the same (PG -> array of osds),
except for the incremental remove: it's an empty mapping in new_pg_temp
for pg_temp and a separate old_pg_upmap set for pg_upmap. (This isn't
to allow for empty pg_upmap mappings -- apparently, pg_temp just wasn't
looked at as an example for pg_upmap encoding.)
Reuse __decode_pg_temp() for decoding pg_upmap and new_pg_upmap.
__decode_pg_temp() stores into pg_temp union member, but since pg_upmap
union member is identical, reading through pg_upmap later is OK.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Some of these won't be as efficient as they could be (e.g.
ceph_decode_skip_set(... 32 ...) could advance by len * sizeof(u32)
once instead of advancing by sizeof(u32) len times), but that's fine
and not worth a bunch of extra macro code.
Replace skip_name_map() with ceph_decode_skip_map as an example.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Make __{lookup,remove}_pg_mapping() look like their ceph_spg_mapping
counterparts: take const struct ceph_pg *.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
The old (v15) pi->last_force_request_resend has been repurposed to
make pre-RESEND_ON_SPLIT clients that don't check for PG splits but do
obey pi->last_force_request_resend resend on splits. See ceph.git
commit 189ca7ec6420 ("mon/OSDMonitor: make pre-luminous clients resend
ops on split").
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
If there is not enough space then ceph_decode_32_safe() does a goto bad.
We need to return an error code in that situation. The current code
returns ERR_PTR(0) which is NULL. The callers are not expecting that
and it results in a NULL dereference.
Fixes: f24e9980eb ("ceph: OSD client")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Since ceph.git commit 4e28f9e63644 ("osd/OSDMap: clear osd_info,
osd_xinfo on osd deletion"), weight is set to IN when OSD is deleted.
This changes the result of applying an incremental for clients, not
just OSDs. Because CRUSH computations are obviously affected,
pre-4e28f9e63644 servers disagree with post-4e28f9e63644 clients on
object placement, resulting in misdirected requests.
Mirrors ceph.git commit a6009d1039a55e2c77f431662b3d6cc5a8e8e63f.
Fixes: 930c532869 ("libceph: apply new_state before new_up_client on incrementals")
Link: http://tracker.ceph.com/issues/19122
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Sage Weil <sage@redhat.com>
Older (shorter) CRUSH maps too need to be finalized.
Fixes: 66a0e2d579 ("crush: remove mutable part of CRUSH map")
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
With EC overwrites maturing, the kernel client will be getting exposed
to potentially very wide EC pools. While "min(pi->size, X)" works fine
when the cluster is stable and happy, truncating OSD sets interferes
with resend logic (ceph_is_new_interval(), etc). Abort the mapping if
the pool is too wide, assigning the request to the homeless session.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Sage Weil <sage@redhat.com>
Much like Arlo Guthrie, I decided that one big pile is better than two
little piles.
Reflects ceph.git commit 95c2df6c7e0b22d2ea9d91db500cf8b9441c73ba.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Then add it to the working state. It would be very nice if we didn't
have to take a lock to calculate a crush placement. By moving the
permutation array into the working data, we can treat the CRUSH map as
immutable.
Reflects ceph.git commit cbcd039651c0569551cb90d26ce27e1432671f2a.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
