libceph: add osd_req_op_extent_osd_data_bvecs()

... and store num_bvecs for client code's convenience.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>

libceph: add osd_req_op_extent_osd_data_bvecs()

... and store num_bvecs for client code's convenience.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>

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libceph, ceph: add __init attribution to init funcitons

Add __init attribution to the functions which are called only once
during initiating/registering operations and deleting unnecessary
symbol ex

libceph, ceph: add __init attribution to init funcitons

Add __init attribution to the functions which are called only once
during initiating/registering operations and deleting unnecessary
symbol exports.

Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

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libceph, ceph: move ceph_calc_file_object_mapping() to striper.c

ceph_calc_file_object_mapping() has nothing to do with osdmaps.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

libceph: introduce BVECS data type

In preparation for rbd "fancy" striping, introduce ceph_bvec_iter for
working with bio_vec array data buffers. The wrappers are trivial, but
make it look similar

libceph: introduce BVECS data type

In preparation for rbd "fancy" striping, introduce ceph_bvec_iter for
working with bio_vec array data buffers. The wrappers are trivial, but
make it look similar to ceph_bio_iter.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

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libceph, rbd: new bio handling code (aka don't clone bios)

The reason we clone bios is to be able to give each object request
(and consequently each ceph_osd_data/ceph_msg_data item) its own
pointer

libceph, rbd: new bio handling code (aka don't clone bios)

The reason we clone bios is to be able to give each object request
(and consequently each ceph_osd_data/ceph_msg_data item) its own
pointer to a (list of) bio(s). The messenger then initializes its
cursor with cloned bio's ->bi_iter, so it knows where to start reading
from/writing to. That's all the cloned bios are used for: to determine
each object request's starting position in the provided data buffer.

Introduce ceph_bio_iter to do exactly that -- store position within bio
list (i.e. pointer to bio) + position within that bio (i.e. bvec_iter).

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

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libceph, ceph: change ceph_calc_file_object_mapping() signature

- make it void
- xlen (object extent length) out parameter should be u32 because only
a single stripe unit is mapped at a time

Sign

libceph, ceph: change ceph_calc_file_object_mapping() signature

- 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>

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License cleanup: add SPDX GPL-2.0 license identifier to files with no license

Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

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>

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ceph: nuke startsync op

startsync is a no-op, has been for years. Remove it.

Link: http://tracker.ceph.com/issues/20604
Signed-off-by: Yanhu Cao <gmayyyha@gmail.com>
Reviewed-by: "Yan, Zheng" <zya

ceph: nuke startsync op

startsync is a no-op, has been for years. Remove it.

Link: http://tracker.ceph.com/issues/20604
Signed-off-by: Yanhu Cao <gmayyyha@gmail.com>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

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libceph: make RECOVERY_DELETES feature create a new interval

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.

libceph: make RECOVERY_DELETES feature create a new interval

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>

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libceph: make encode_request_*() work with r_mempool requests

Messages allocated out of ceph_msgpool have a fixed front length
(pool->front_len). Asserting that the entire front has been filled
whi

libceph: make encode_request_*() work with r_mempool requests

Messages allocated out of ceph_msgpool have a fixed front length
(pool->front_len). Asserting that the entire front has been filled
while encoding is thus wrong.

Fixes: 8cb441c0545d ("libceph: MOSDOp v8 encoding (actual spgid + full hash)")
Reported-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>

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libceph: don't call encode_request_finish() on MOSDBackoff messages

encode_request_finish() is for MOSDOp messages. Calling it on
MOSDBackoff ack-block messages corrupts them.

Fixes: a02a946dfe96

libceph: don't call encode_request_finish() on MOSDBackoff messages

encode_request_finish() is for MOSDOp messages. Calling it on
MOSDBackoff ack-block messages corrupts them.

Fixes: a02a946dfe96 ("libceph: respect RADOS_BACKOFF backoffs")
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

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libceph: respect RADOS_BACKOFF backoffs

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

libceph: avoid unnecessary pi lookups in calc_target()

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

libceph: use target pi for calc_target() calculations

For luminous and beyond we are encoding the actual spgid, which
requires operating with the correct pg_num, i.e. that of the target
pool.

Signe

libceph: use target pi for calc_target() calculations

For luminous and beyond we are encoding the actual spgid, which
requires operating with the correct pg_num, i.e. that of the target
pool.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

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libceph: always populate t->target_{oid,oloc} in calc_target()

need_check_tiering logic doesn't make a whole lot of sense. Drop it
and apply tiering unconditionally on every calc_target() call inst

libceph: always populate t->target_{oid,oloc} in calc_target()

need_check_tiering logic doesn't make a whole lot of sense. Drop it
and apply tiering unconditionally on every calc_target() call instead.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

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libceph: make sure need_resend targets reflect latest map

Otherwise we may miss events like PG splits, pool deletions, etc when
we get multiple incremental maps at once. Because check_pool_dne() ca

libceph: make sure need_resend targets reflect latest map

Otherwise we may miss events like PG splits, pool deletions, etc when
we get multiple incremental maps at once. Because check_pool_dne() can
now be fed an unlinked request, finish_request() needed to be taught to
handle unlinked requests.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

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libceph: delete from need_resend_linger before check_linger_pool_dne()

When processing a map update consisting of multiple incrementals, we
may end up running check_linger_pool_dne() on a lingering

libceph: delete from need_resend_linger before check_linger_pool_dne()

When processing a map update consisting of multiple incrementals, we
may end up running check_linger_pool_dne() on a lingering request that
was previously added to need_resend_linger list. If it is concluded
that the target pool doesn't exist, the request is killed off while
still on need_resend_linger list, which leads to a crash on a NULL
lreq->osd in kick_requests():

libceph: linger_id 18446462598732840961 pool does not exist
BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
IP: ceph_osdc_handle_map+0x4ae/0x870

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

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libceph: resend on PG splits if OSD has RESEND_ON_SPLIT

Note that ceph_osd_request_target fields are updated regardless of
RESEND_ON_SPLIT.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

libceph: drop need_resend from calc_target()

Replace it with more fine-grained bools to separate updating
ceph_osd_request_target fields and the decision to resend.

Signed-off-by: Ilya Dryomov <idr

libceph: drop need_resend from calc_target()

Replace it with more fine-grained bools to separate updating
ceph_osd_request_target fields and the decision to resend.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

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libceph: MOSDOp v8 encoding (actual spgid + full hash)

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

libceph: encode_{pgid,oloc}() helpers

Factor out encode_{pgid,oloc}() and use ceph_encode_string() for oid.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

libceph: introduce ceph_spg, ceph_pg_to_primary_shard()

Store both raw pgid and actual spgid in ceph_osd_request_target.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

libceph: fold [l]req->last_force_resend into ceph_osd_request_target

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

fs: ceph: CURRENT_TIME with ktime_get_real_ts()

CURRENT_TIME is not y2038 safe. The macro will be deleted and all the
references to it will be replaced by ktime_get_* apis.

struct timespec is also

fs: ceph: CURRENT_TIME with ktime_get_real_ts()

CURRENT_TIME is not y2038 safe. The macro will be deleted and all the
references to it will be replaced by ktime_get_* apis.

struct timespec is also not y2038 safe. Retain timespec for timestamp
representation here as ceph uses it internally everywhere. These
references will be changed to use struct timespec64 in a separate patch.

The current_fs_time() api is being changed to use vfs struct inode* as
an argument instead of struct super_block*.

Set the new mds client request r_stamp field using ktime_get_real_ts()
instead of using current_fs_time().

Also, since r_stamp is used as mtime on the server, use timespec_trunc()
to truncate the timestamp, using the right granularity from the
superblock.

This api will be transitioned to be y2038 safe along with vfs.

Link: http://lkml.kernel.org/r/1491613030-11599-5-git-send-email-deepa.kernel@gmail.com
Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
M: Ilya Dryomov <idryomov@gmail.com>
M: "Yan, Zheng" <zyan@redhat.com>
M: Sage Weil <sage@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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libceph: add an epoch_barrier field to struct ceph_osd_client

Cephfs can get cap update requests that contain a new epoch barrier in
them. When that happens we want to pause all OSD traffic until th

libceph: add an epoch_barrier field to struct ceph_osd_client

Cephfs can get cap update requests that contain a new epoch barrier in
them. When that happens we want to pause all OSD traffic until the right
map epoch arrives.

Add an epoch_barrier field to ceph_osd_client that is protected by the
osdc->lock rwsem. When the barrier is set, and the current OSD map
epoch is below that, pause the request target when submitting the
request or when revisiting it. Add a way for upper layers (cephfs)
to update the epoch_barrier as well.

If we get a new map, compare the new epoch against the barrier before
kicking requests and request another map if the map epoch is still lower
than the one we want.

If we get a map with a full pool, or at quota condition, then set the
barrier to the current epoch value.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

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