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path: root/drivers/md/dm-log.c
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2024-02-20dm: update relevant MODULE_AUTHOR entries to latest dm-devel mailing listMike Snitzer1-1/+1
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
2024-02-20dm io: Support IO priorityHongyu Jin1-2/+2
Some IO will dispatch from kworker with different io_context settings than the submitting task, we may need to specify a priority to avoid losing priority. Add IO priority parameter to dm_io() and update all callers. Co-developed-by: Yibin Ding <yibin.ding@unisoc.com> Signed-off-by: Yibin Ding <yibin.ding@unisoc.com> Signed-off-by: Hongyu Jin <hongyu.jin@unisoc.com> Reviewed-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
2023-04-11dm: remove unnecessary (void*) conversionsYu Zhe1-12/+12
Pointer variables of void * type do not require type cast. Signed-off-by: Yu Zhe <yuzhe@nfschina.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
2023-02-14dm log: avoid multiple line dereferenceHeinz Mauelshagen1-2/+1
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
2023-02-14dm log: avoid trailing semicolon in macroHeinz Mauelshagen1-1/+1
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
2023-02-14dm: avoid split of quoted strings where possibleHeinz Mauelshagen1-2/+1
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
2023-02-14dm: add missing empty linesHeinz Mauelshagen1-0/+6
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
2023-02-14dm: correct block comments format.Heinz Mauelshagen1-8/+16
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
2023-02-14dm: address indent/space issuesHeinz Mauelshagen1-4/+4
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
2023-02-14dm: address space issues relative to switch/while/for/...Heinz Mauelshagen1-2/+2
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
2023-02-14dm: enclose complex macros into parentheses where possibleHeinz Mauelshagen1-2/+4
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
2023-02-14dm: change "unsigned" to "unsigned int"Heinz Mauelshagen1-5/+5
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
2023-02-14dm: add missing SPDX-License-IndentifiersHeinz Mauelshagen1-0/+1
'GPL-2.0-only' is used instead of 'GPL-2.0' because SPDX has deprecated its use. Suggested-by: John Wiele <jwiele@redhat.com> Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
2022-07-14dm mirror log: Use the new blk_opf_t typeBart Van Assche1-1/+1
Improve static type checking by using the new blk_opf_t type for a function argument that represents a request operation type. Cc: Alasdair Kergon <agk@redhat.com> Cc: Mike Snitzer <snitzer@kernel.org> Cc: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://lore.kernel.org/r/20220714180729.1065367-28-bvanassche@acm.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-07-14dm/core: Reduce the size of struct dm_io_requestBart Van Assche1-4/+2
Combine the bi_op and bi_op_flags into the bi_opf member. Use the new blk_opf_t type to improve static type checking. This patch does not change any functionality. Cc: Alasdair Kergon <agk@redhat.com> Cc: Mike Snitzer <snitzer@kernel.org> Cc: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://lore.kernel.org/r/20220714180729.1065367-22-bvanassche@acm.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-06-23dm mirror log: clear log bits up to BITS_PER_LONG boundaryMikulas Patocka1-1/+1
Commit 85e123c27d5c ("dm mirror log: round up region bitmap size to BITS_PER_LONG") introduced a regression on 64-bit architectures in the lvm testsuite tests: lvcreate-mirror, mirror-names and vgsplit-operation. If the device is shrunk, we need to clear log bits beyond the end of the device. The code clears bits up to a 32-bit boundary and then calculates lc->sync_count by summing set bits up to a 64-bit boundary (the commit changed that; previously, this boundary was 32-bit too). So, it was using some non-zeroed bits in the calculation and this caused misbehavior. Fix this regression by clearing bits up to BITS_PER_LONG boundary. Fixes: 85e123c27d5c ("dm mirror log: round up region bitmap size to BITS_PER_LONG") Cc: stable@vger.kernel.org Reported-by: Benjamin Marzinski <bmarzins@redhat.com> Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
2022-06-17dm mirror log: round up region bitmap size to BITS_PER_LONGMikulas Patocka1-2/+1
The code in dm-log rounds up bitset_size to 32 bits. It then uses find_next_zero_bit_le on the allocated region. find_next_zero_bit_le accesses the bitmap using unsigned long pointers. So, on 64-bit architectures, it may access 4 bytes beyond the allocated size. Fix this bug by rounding up bitset_size to BITS_PER_LONG. This bug was found by running the lvm2 testsuite with kasan. Fixes: 29121bd0b00e ("[PATCH] dm mirror log: bitset_size fix") Cc: stable@vger.kernel.org Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
2021-10-18dm: use bdev_nr_sectors and bdev_nr_bytes instead of open coding themChristoph Hellwig1-1/+1
Use the proper helpers to read the block device size. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Mike Snitzer <snitzer@redhat.com> Link: https://lore.kernel.org/r/20211018101130.1838532-6-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-08-10dm: update target status functions to support IMA measurementTushar Sugandhi1-0/+10
For device mapper targets to take advantage of IMA's measurement capabilities, the status functions for the individual targets need to be updated to handle the status_type_t case for value STATUSTYPE_IMA. Update status functions for the following target types, to log their respective attributes to be measured using IMA. 01. cache 02. crypt 03. integrity 04. linear 05. mirror 06. multipath 07. raid 08. snapshot 09. striped 10. verity For rest of the targets, handle the STATUSTYPE_IMA case by setting the measurement buffer to NULL. For IMA to measure the data on a given system, the IMA policy on the system needs to be updated to have the following line, and the system needs to be restarted for the measurements to take effect. /etc/ima/ima-policy measure func=CRITICAL_DATA label=device-mapper template=ima-buf The measurements will be reflected in the IMA logs, which are located at: /sys/kernel/security/integrity/ima/ascii_runtime_measurements /sys/kernel/security/integrity/ima/binary_runtime_measurements These IMA logs can later be consumed by various attestation clients running on the system, and send them to external services for attesting the system. The DM target data measured by IMA subsystem can alternatively be queried from userspace by setting DM_IMA_MEASUREMENT_FLAG with DM_TABLE_STATUS_CMD. Signed-off-by: Tushar Sugandhi <tusharsu@linux.microsoft.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2016-11-01block,fs: use REQ_* flags directlyChristoph Hellwig1-1/+1
Remove the WRITE_* and READ_SYNC wrappers, and just use the flags directly. Where applicable this also drops usage of the bio_set_op_attrs wrapper. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-25dm log: fix unitialized bio operation flagsHeinz Mauelshagen1-5/+6
Commit e6047149db ("dm: use bio op accessors") switched DM over to using bio_set_op_attrs() but didn't take care to initialize lc->io_req.bi_op_flags in dm-log.c:rw_header(). This caused rw_header()'s call to dm_io() to make bio->bi_op_flags be uninitialized in dm-io.c:do_region(), which ultimately resulted in a SCSI BUG() in sd_init_command(). Also, adjust rw_header() and its callers to use REQ_OP_{READ|WRITE}. Fixes: e6047149db ("dm: use bio op accessors") Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Reviewed-by: Shaun Tancheff <shaun.tancheff@seagate.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2016-06-07dm: use bio op accessorsMike Christie1-2/+3
Separate the op from the rq_flag_bits and have dm set/get the bio using bio_set_op_attrs/bio_op. Signed-off-by: Mike Christie <mchristi@redhat.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2012-07-31dm: use memweight()Akinobu Mita1-11/+2
Use memweight() to count the total number of bits set in memory area. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Alasdair Kergon <agk@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-28dm: reject trailing characters in sccanf inputMikulas Patocka1-1/+2
Device mapper uses sscanf to convert arguments to numbers. The problem is that the way we use it ignores additional unmatched characters in the scanned string. For example, this `if (sscanf(string, "%d", &number) == 1)' will match a number, but also it will match number with some garbage appended, like "123abc". As a result, device mapper accepts garbage after some numbers. For example the command `dmsetup create vg1-new --table "0 16384 linear 254:1bla 34816bla"' will pass without an error. This patch fixes all sscanf uses in device mapper. It appends "%c" with a pointer to a dummy character variable to every sscanf statement. The construct `if (sscanf(string, "%d%c", &number, &dummy) == 1)' succeeds only if string is a null-terminated number (optionally preceded by some whitespace characters). If there is some character appended after the number, sscanf matches "%c", writes the character to the dummy variable and returns 2. We check the return value for 1 and consequently reject numbers with some garbage appended. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Acked-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2011-08-02dm: use vzallocJoe Perches1-2/+1
Use vzalloc() instead of vmalloc()+memset(). Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2011-08-02dm log: clean up bit little endian bitopsAkinobu Mita1-5/+4
Using __test_and_{set,clear}_bit_le() with ignoring its return value can be replaced with __{set,clear}_bit_le(). This also removes unnecessary casts. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2011-08-02dm: suppress endian warningsAlasdair G Kergon1-7/+13
Suppress sparse warnings about cpu_to_le32() by using __le32 types for on-disk data etc. Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2011-05-29dm io: use fixed initial mempool sizeMikulas Patocka1-2/+1
Replace the arbitrary calculation of an initial io struct mempool size with a constant. The code calculated the number of reserved structures based on the request size and used a "magic" multiplication constant of 4. This patch changes it to reserve a fixed number - itself still chosen quite arbitrarily. Further testing might show if there is a better number to choose. Note that if there is no memory pressure, we can still allocate an arbitrary number of "struct io" structures. One structure is enough to process the whole request. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2011-03-26Merge git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dmLinus Torvalds1-1/+1
* git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm: dm stripe: implement merge method dm mpath: allow table load with no priority groups dm mpath: fail message ioctl if specified path is not valid dm ioctl: add flag to wipe buffers for secure data dm ioctl: prepare for crypt key wiping dm crypt: wipe keys string immediately after key is set dm: add flakey target dm: fix opening log and cow devices for read only tables
2011-03-24dm: fix opening log and cow devices for read only tablesMilan Broz1-1/+1
If a table is read-only, also open any log and cow devices it uses read-only. Previously, even read-only devices were opened read-write internally. After patch 75f1dc0d076d1c1168f2115f1941ea627d38bd5a block: check bdev_read_only() from blkdev_get() was applied, loading such tables began to fail. The patch was reverted by e51900f7d38cbcfb481d84567fd92540e7e1d23a block: revert block_dev read-only check but this patch fixes this part of the code to work with the original patch. Signed-off-by: Milan Broz <mbroz@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2011-03-24dm: use little-endian bitopsAkinobu Mita1-4/+4
As a preparation for removing ext2 non-atomic bit operations from asm/bitops.h. This converts ext2 non-atomic bit operations to little-endian bit operations. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Alasdair Kergon <agk@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-01-13dm log: use PTR_ERR value instead of ENOMEMDan Carpenter1-1/+1
It's nicer to return the PTR_ERR() value instead of just returning -ENOMEM. In the current code the PTR_ERR() value is always equal to -ENOMEM so this doesn't actually affect anything, but still... In addition, dm_dirty_log_create() doesn't check for a specific -ENOMEM return. So this change is safe relative to potential for a non -ENOMEM return in the future. Signed-off-by: Dan Carpenter <error27@gmail.com> Acked-by: Jonathan Brassow <jbrassow@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2010-09-10dm: implement REQ_FLUSH/FUA support for bio-based dmTejun Heo1-1/+1
This patch converts bio-based dm to support REQ_FLUSH/FUA instead of now deprecated REQ_HARDBARRIER. * -EOPNOTSUPP handling logic dropped. * Preflush is handled as before but postflush is dropped and replaced with passing down REQ_FUA to member request_queues. This replaces one array wide cache flush w/ member specific FUA writes. * __split_and_process_bio() now calls __clone_and_map_flush() directly for flushes and guarantees all FLUSH bio's going to targets are zero ` length. * It's now guaranteed that all FLUSH bio's which are passed onto dm targets are zero length. bio_empty_barrier() tests are replaced with REQ_FLUSH tests. * Empty WRITE_BARRIERs are replaced with WRITE_FLUSHes. * Dropped unlikely() around REQ_FLUSH tests. Flushes are not unlikely enough to be marked with unlikely(). * Block layer now filters out REQ_FLUSH/FUA bio's if the request_queue doesn't support cache flushing. Advertise REQ_FLUSH | REQ_FUA capability. * Request based dm isn't converted yet. dm_init_request_based_queue() resets flush support to 0 for now. To avoid disturbing request based dm code, dm->flush_error is added for bio based dm while requested based dm continues to use dm->barrier_error. Lightly tested linear, stripe, raid1, snap and crypt targets. Please proceed with caution as I'm not familiar with the code base. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: dm-devel@redhat.com Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-03-06dm table: remove unused dm_get_device range parametersNikanth Karthikesan1-2/+1
Remove unused parameters(start and len) of dm_get_device() and fix the callers. Signed-off-by: Nikanth Karthikesan <knikanth@suse.de> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2009-12-11dm raid1: report flush errors separately in statusMikulas Patocka1-4/+12
Report flush errors as 'F' instead of 'D' for log and mirror devices. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2009-12-11dm log: use flush callback fnMikulas Patocka1-2/+15
Call the flush callback from the log. If flush failed, we have no alternative but to mark the whole log as dirty. Also we set the variable flush_failed to prevent any bits ever being marked as clean again. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2009-12-11dm log: add flush callback fnMikulas Patocka1-2/+4
Introduce a callback pointer from the log to dm-raid1 layer. Before some region is set as "in-sync", we need to flush hardware cache on all the disks. But the log module doesn't have access to the mirror_set structure. So it will use this callback. So far the callback is unused, it will be used in further patches. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2009-12-11dm log: introduce flush_failed variableMikulas Patocka1-1/+4
Introduce "flush failed" variable. When a flush before clearing a bit in the log fails, we don't know anything about which which regions are in-sync and which not. So we need to set all regions as not-in-sync and set the variable "flush_failed" to prevent setting the in-sync bit in the future. A target reload is the only way to get out of this situation. The variable will be set in following patches. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2009-12-11dm log: add flush_header functionMikulas Patocka1-1/+22
Introduce flush_header and use it to flush the log device. Note that we don't have to flush if all the regions transition from "dirty" to "clean" state. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2009-12-11dm raid1: split touched state into twoMikulas Patocka1-7/+11
Split the variable "touched" into two, "touched_dirtied" and "touched_cleaned", set when some region was dirtied or cleaned. This will be used to optimize flushes. After a transition from "dirty" to "clean" state we don't have flush hardware cache on the log device. After a transition from "clean" to "dirty" the cache must be flushed. Before a transition from "clean" to "dirty" state we don't have to flush all the raid legs. Before a transition from "dirty" to "clean" we must flush all the legs to make sure that they are really in sync. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2009-06-22dm log: fix create_log_context to use logical_block_size of log deviceMike Snitzer1-3/+4
create_log_context() must use the logical_block_size from the log disk, where the I/O happens, not the target's logical_block_size. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2009-06-22dm: use i_size_readMikulas Patocka1-1/+1
Use i_size_read() instead of reading i_size. If someone changes the size of the device simultaneously, i_size_read is guaranteed to return a valid value (either the old one or the new one). i_size can return some intermediate invalid value (on 32-bit computers with 64-bit i_size, the reads to both halves of i_size can be interleaved with updates to i_size, resulting in garbage being returned). Cc: stable@kernel.org Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2009-05-23block: Do away with the notion of hardsect_sizeMartin K. Petersen1-1/+2
Until now we have had a 1:1 mapping between storage device physical block size and the logical block sized used when addressing the device. With SATA 4KB drives coming out that will no longer be the case. The sector size will be 4KB but the logical block size will remain 512-bytes. Hence we need to distinguish between the physical block size and the logical ditto. This patch renames hardsect_size to logical_block_size. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-04-02dm log: remove struct dm_dirty_log_internalMike Snitzer1-44/+14
Remove the 'dm_dirty_log_internal' structure. The resulting cleanup eliminates extra memory allocations. Therefore exposing the internal list_head to the external 'dm_dirty_log_type' structure is a worthwhile compromise. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2009-04-02dm log: use standard kernel module refcountMike Snitzer1-16/+3
Avoid private module usage accounting by removing 'use' from dm_dirty_log_internal. The standard module reference counting is sufficient. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2009-01-06dm log: ensure log bitmap fits on log deviceMilan Broz1-0/+8
Check that the log bitmap will fit within the log device. Signed-off-by: Milan Broz <mbroz@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2009-01-06dm log: move region_size validationMilan Broz1-2/+14
Move log size validation from mirror target to log constructor. Removed PAGE_SIZE restriction we no longer think necessary. Signed-off-by: Milan Broz <mbroz@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2009-01-06dm log: avoid reinitialising io_req on every operationTakahiro Yasui1-10/+7
rw_header function updates three members of io_req data every time when I/O is processed. bi_rw and notify.fn are never modified once they get initialized, and so they can be set in advance. header_to_disk() can also be pulled out of write_header() since only one caller needs it and write_header() can be replaced by rw_header() directly. Signed-off-by: Takahiro Yasui <tyasui@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2009-01-06dm log: fix dm_io_client leak on error pathsTakahiro Yasui1-0/+5
In create_log_context function, dm_io_client_destroy function needs to be called, when memory allocation of disk_header, sync_bits and recovering_bits failed, but dm_io_client_destroy is not called. Cc: stable@kernel.org Signed-off-by: Takahiro Yasui <tyasui@redhat.com> Acked-by: Jonathan Brassow <jbrassow@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2008-10-21dm: remove dm header from targetsMikulas Patocka1-1/+1
Change #include "dm.h" to #include <linux/device-mapper.h> in all targets. Targets should not need direct access to internal DM structures. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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