31 Jan, 2014
1 commit
-
Pull core block IO changes from Jens Axboe:
"The major piece in here is the immutable bio_ve series from Kent, the
rest is fairly minor. It was supposed to go in last round, but
various issues pushed it to this release instead. The pull request
contains:- Various smaller blk-mq fixes from different folks. Nothing major
here, just minor fixes and cleanups.- Fix for a memory leak in the error path in the block ioctl code
from Christian Engelmayer.- Header export fix from CaiZhiyong.
- Finally the immutable biovec changes from Kent Overstreet. This
enables some nice future work on making arbitrarily sized bios
possible, and splitting more efficient. Related fixes to immutable
bio_vecs:- dm-cache immutable fixup from Mike Snitzer.
- btrfs immutable fixup from Muthu Kumar.- bio-integrity fix from Nic Bellinger, which is also going to stable"
* 'for-3.14/core' of git://git.kernel.dk/linux-block: (44 commits)
xtensa: fixup simdisk driver to work with immutable bio_vecs
block/blk-mq-cpu.c: use hotcpu_notifier()
blk-mq: for_each_* macro correctness
block: Fix memory leak in rw_copy_check_uvector() handling
bio-integrity: Fix bio_integrity_verify segment start bug
block: remove unrelated header files and export symbol
blk-mq: uses page->list incorrectly
blk-mq: use __smp_call_function_single directly
btrfs: fix missing increment of bi_remaining
Revert "block: Warn and free bio if bi_end_io is not set"
block: Warn and free bio if bi_end_io is not set
blk-mq: fix initializing request's start time
block: blk-mq: don't export blk_mq_free_queue()
block: blk-mq: make blk_sync_queue support mq
block: blk-mq: support draining mq queue
dm cache: increment bi_remaining when bi_end_io is restored
block: fixup for generic bio chaining
block: Really silence spurious compiler warnings
block: Silence spurious compiler warnings
block: Kill bio_pair_split()
...
07 Jan, 2014
1 commit
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Starting with commit c0820cf5ad095 ("dm: introduce per_bio_data"),
device mapper has the capability to pre-allocate a target-specific
structure with the bio.This patch changes dm-delay to use this facility instead of a slab cache
and mempool.Signed-off-by: Mikulas Patocka
Signed-off-by: Mike Snitzer
01 Jan, 2014
1 commit
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Needed to bring blk-mq uptodate, since changes have been going in
since for-3.14/core was established.Fixup merge issues related to the immutable biovec changes.
Signed-off-by: Jens Axboe
Conflicts:
block/blk-flush.c
fs/btrfs/check-integrity.c
fs/btrfs/extent_io.c
fs/btrfs/scrub.c
fs/logfs/dev_bdev.c
24 Nov, 2013
1 commit
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Immutable biovecs are going to require an explicit iterator. To
implement immutable bvecs, a later patch is going to add a bi_bvec_done
member to this struct; for now, this patch effectively just renames
things.Signed-off-by: Kent Overstreet
Cc: Jens Axboe
Cc: Geert Uytterhoeven
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: "Ed L. Cashin"
Cc: Nick Piggin
Cc: Lars Ellenberg
Cc: Jiri Kosina
Cc: Matthew Wilcox
Cc: Geoff Levand
Cc: Yehuda Sadeh
Cc: Sage Weil
Cc: Alex Elder
Cc: ceph-devel@vger.kernel.org
Cc: Joshua Morris
Cc: Philip Kelleher
Cc: Rusty Russell
Cc: "Michael S. Tsirkin"
Cc: Konrad Rzeszutek Wilk
Cc: Jeremy Fitzhardinge
Cc: Neil Brown
Cc: Alasdair Kergon
Cc: Mike Snitzer
Cc: dm-devel@redhat.com
Cc: Martin Schwidefsky
Cc: Heiko Carstens
Cc: linux390@de.ibm.com
Cc: Boaz Harrosh
Cc: Benny Halevy
Cc: "James E.J. Bottomley"
Cc: Greg Kroah-Hartman
Cc: "Nicholas A. Bellinger"
Cc: Alexander Viro
Cc: Chris Mason
Cc: "Theodore Ts'o"
Cc: Andreas Dilger
Cc: Jaegeuk Kim
Cc: Steven Whitehouse
Cc: Dave Kleikamp
Cc: Joern Engel
Cc: Prasad Joshi
Cc: Trond Myklebust
Cc: KONISHI Ryusuke
Cc: Mark Fasheh
Cc: Joel Becker
Cc: Ben Myers
Cc: xfs@oss.sgi.com
Cc: Steven Rostedt
Cc: Frederic Weisbecker
Cc: Ingo Molnar
Cc: Len Brown
Cc: Pavel Machek
Cc: "Rafael J. Wysocki"
Cc: Herton Ronaldo Krzesinski
Cc: Ben Hutchings
Cc: Andrew Morton
Cc: Guo Chao
Cc: Tejun Heo
Cc: Asai Thambi S P
Cc: Selvan Mani
Cc: Sam Bradshaw
Cc: Wei Yongjun
Cc: "Roger Pau Monné"
Cc: Jan Beulich
Cc: Stefano Stabellini
Cc: Ian Campbell
Cc: Sebastian Ott
Cc: Christian Borntraeger
Cc: Minchan Kim
Cc: Jiang Liu
Cc: Nitin Gupta
Cc: Jerome Marchand
Cc: Joe Perches
Cc: Peng Tao
Cc: Andy Adamson
Cc: fanchaoting
Cc: Jie Liu
Cc: Sunil Mushran
Cc: "Martin K. Petersen"
Cc: Namjae Jeon
Cc: Pankaj Kumar
Cc: Dan Magenheimer
Cc: Mel Gorman 6
19 Nov, 2013
1 commit
-
The dm-delay target uses a shared workqueue for multiple instances. This
can cause deadlock if two or more dm-delay targets are stacked on the top
of each other.This patch changes dm-delay to use a per-instance workqueue.
Cc: stable@vger.kernel.org # 2.6.22+
Signed-off-by: Mikulas Patocka
Signed-off-by: Mike Snitzer
02 Mar, 2013
2 commits
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Use 'bio' in the name of variables and functions that deal with
bios rather than 'request' to avoid confusion with the normal
block layer use of 'request'.No functional changes.
Signed-off-by: Alasdair G Kergon
-
Avoid returning a truncated table or status string instead of setting
the DM_BUFFER_FULL_FLAG when the last target of a table fills the
buffer.When processing a table or status request, the function retrieve_status
calls ti->type->status. If ti->type->status returns non-zero,
retrieve_status assumes that the buffer overflowed and sets
DM_BUFFER_FULL_FLAG.However, targets don't return non-zero values from their status method
on overflow. Most targets returns always zero.If a buffer overflow happens in a target that is not the last in the
table, it gets noticed during the next iteration of the loop in
retrieve_status; but if a buffer overflow happens in the last target, it
goes unnoticed and erroneously truncated data is returned.In the current code, the targets behave in the following way:
* dm-crypt returns -ENOMEM if there is not enough space to store the
key, but it returns 0 on all other overflows.
* dm-thin returns errors from the status method if a disk error happened.
This is incorrect because retrieve_status doesn't check the error
code, it assumes that all non-zero values mean buffer overflow.
* all the other targets always return 0.This patch changes the ti->type->status function to return void (because
most targets don't use the return code). Overflow is detected in
retrieve_status: if the status method fills up the remaining space
completely, it is assumed that buffer overflow happened.Cc: stable@vger.kernel.org
Signed-off-by: Mikulas Patocka
Signed-off-by: Alasdair G Kergon
22 Dec, 2012
1 commit
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This patch removes map_info from bio-based device mapper targets.
map_info is still used for request-based targets.Signed-off-by: Mikulas Patocka
Signed-off-by: Alasdair G Kergon
27 Jul, 2012
1 commit
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Commit outstanding metadata before returning the status for a dm thin
pool so that the numbers reported are as up-to-date as possible.The commit is not performed if the device is suspended or if
the DM_NOFLUSH_FLAG is supplied by userspace and passed to the target
through a new 'status_flags' parameter in the target's dm_status_fn.The userspace dmsetup tool will support the --noflush flag with the
'dmsetup status' and 'dmsetup wait' commands from version 1.02.76
onwards.Tested-by: Mike Snitzer
Signed-off-by: Alasdair G Kergon
29 Mar, 2012
1 commit
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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
Acked-by: Mike Snitzer
Signed-off-by: Alasdair G Kergon
14 Jan, 2011
1 commit
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Convert all create[_singlethread]_work() users to the new
alloc[_ordered]_workqueue(). This conversion is mechanical and
doesn't introduce any behavior change.Signed-off-by: Tejun Heo
Signed-off-by: Mike Snitzer
Signed-off-by: Alasdair G Kergon
12 Aug, 2010
2 commits
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Enable discard support for the delay target.
Signed-off-by: Mike Snitzer
Signed-off-by: Alasdair G Kergon -
Use new dm_target_offset() macro to avoid most references to ti->begin
in dm targets.Signed-off-by: Alasdair G Kergon
06 Mar, 2010
1 commit
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Remove unused parameters(start and len) of dm_get_device()
and fix the callers.Signed-off-by: Nikanth Karthikesan
Signed-off-by: Alasdair G Kergon
24 Jul, 2009
1 commit
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Incorrect device area lengths are being passed to device_area_is_valid().
The regression appeared in 2.6.31-rc1 through commit
754c5fc7ebb417b23601a6222a6005cc2e7f2913.With the dm-stripe target, the size of the target (ti->len) was used
instead of the stripe_width (ti->len/#stripes). An example of a
consequent incorrect error message is:device-mapper: table: 254:0: sdb too small for target
Signed-off-by: Mike Snitzer
Signed-off-by: Alasdair G Kergon
22 Jun, 2009
2 commits
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Add .iterate_devices to 'struct target_type' to allow a function to be
called for all devices in a DM target. Implemented it for all targets
except those in dm-snap.c (origin and snapshot).(The raid1 version number jumps to 1.12 because we originally reserved
1.1 to 1.11 for 'block_on_error' but ended up using 'handle_errors'
instead.)Signed-off-by: Mike Snitzer
Signed-off-by: Alasdair G Kergon
Cc: martin.petersen@oracle.com -
Flush support for dm-delay target.
Signed-off-by: Mikulas Patocka
Signed-off-by: Alasdair G Kergon
15 Apr, 2009
1 commit
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It's used by DM and MD and generally useful, so move the bio list
helpers into bio.h.Signed-off-by: Christoph Hellwig
Acked-by: Alasdair G Kergon
Signed-off-by: Jens Axboe
06 Jan, 2009
1 commit
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Change dm_unregister_target to return void and use BUG() for error
reporting.dm_unregister_target can only fail because of programming bug in the
target driver. It can't fail because of user's behavior or disk errors.This patch changes unregister_target to return void and use BUG if
someone tries to unregister non-registered target or unregister target
that is in use.This patch removes code duplication (testing of error codes in all dm
targets) and reports bugs in just one place, in dm_unregister_target. In
some target drivers, these return codes were ignored, which could lead
to a situation where bugs could be missed.Signed-off-by: Mikulas Patocka
Signed-off-by: Alasdair G Kergon
22 Oct, 2008
1 commit
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Change #include "dm.h" to #include in all targets.
Targets should not need direct access to internal DM structures.Signed-off-by: Mikulas Patocka
Signed-off-by: Alasdair G Kergon
20 Oct, 2007
3 commits
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Remove BIO_LIST and DEFINE_BIO_LIST macros that gain us nothing
since contents are initialised to NULL.Cc: Jan Engelhardt
Signed-off-by: Alasdair G Kergon -
Fix missing space in dm-delay target status output
if separate read and write delay are configured.Signed-off-by: Milan Broz
Signed-off-by: Alasdair G Kergon -
Add missing 'dm_put_device' to dm-delay target constructor.
Signed-off-by: Dmitry Monakhov
Signed-off-by: Milan Broz
Signed-off-by: Alasdair G Kergon
13 Jul, 2007
2 commits
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Use setup_timer().
Replace semaphore with mutex.Signed-off-by: Alasdair G Kergon
Signed-off-by: Linus Torvalds -
Use new KMEM_CACHE() macro and make the newly-exposed structure names more
meaningful. Also remove some superfluous casts and inlines (let a modern
compiler be the judge).Acked-by: Christoph Lameter
Signed-off-by: Alasdair G Kergon
Signed-off-by: Linus Torvalds
10 May, 2007
1 commit
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New device-mapper target that can delay I/O (for testing). Reads can be
separated from writes, redirected to different underlying devices and delayed
by differing amounts of time.Signed-off-by: Heinz Mauelshagen
Signed-off-by: Milan Broz
Signed-off-by: Alasdair G Kergon
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
