OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

- A DM multipath stable@ fix to silence an annoying error message that 

isn't _really_ an error
 
 - A DM core @stable fix for discard support that was enabled for an
   entire DM device despite only having partial support for discards due
   to a mix of discard capabilities across the underlying devices.
 
 - A couple other DM core discard fixes.
 
 - A DM bufio @stable fix that resolves a 32-bit overflow
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQEcBAABAgAGBQJaDglsAAoJEMUj8QotnQNaaFwIAMLjV27BYtHBYWnvMlROiXAD
 2aPSEoGHEGcq6BQyTlXyew1CNl0xXOcb8KMFhQMR/IjPuKyLl47OXbavE3TIwVoT
 Lw+XUvXUuxK1Qd34fUvPoPd94w1aJBoY9Wlv5YxCp+U0WQ2SH3kHo/FOFvLPJ6wY
 OhHZiByGvxXWc8tso86zx0pq6j5Nghk18D2lQvaGU28BtElfWE3/xoDr6FrwDqEb
 MvzmUMKs/M5EoJt3HT4SNDFqujkCP69PGjqpHxV9mFT8HaonX+MF61Kr96/Tc6cO
 c+DOkw7kaqnjJsrdKu3KIdtXf3cyoHYqtExXRdzap8QoCQvosNR4r78svcfY0i8=
 =QKXY
 -----END PGP SIGNATURE-----

Merge tag 'for-4.15/dm-changes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

Pull  more device mapper updates from Mike Snitzer:
 "Given your expected travel I figured I'd get these fixes to you sooner
  rather than later.

   - a DM multipath stable@ fix to silence an annoying error message
     that isn't _really_ an error

   - a DM core @stable fix for discard support that was enabled for an
     entire DM device despite only having partial support for discards
     due to a mix of discard capabilities across the underlying devices.

   - a couple other DM core discard fixes.

   - a DM bufio @stable fix that resolves a 32-bit overflow"

* tag 'for-4.15/dm-changes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm bufio: fix integer overflow when limiting maximum cache size
  dm: clear all discard attributes in queue_limits when discards are disabled
  dm: do not set 'discards_supported' in targets that do not need it
  dm: discard support requires all targets in a table support discards
  dm mpath: remove annoying message of 'blk_get_request() returned -11'
This commit is contained in:
Linus Torvalds 2017-11-17 09:40:12 -08:00
parent 854ac87044 74d4108d9e
commit adeba81ac2
5 changed files with 28 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/md/dm-bufio.c
View File

@ -974,7 +974,8 @@ static void __get_memory_limit(struct dm_bufio_client *c,
buffers = c->minimum_buffers;
*limit_buffers = buffers;
*threshold_buffers = buffers * DM_BUFIO_WRITEBACK_PERCENT / 100;
*threshold_buffers = mult_frac(buffers,
DM_BUFIO_WRITEBACK_PERCENT, 100);
}
/*
@ -1910,19 +1911,15 @@ static int __init dm_bufio_init(void)
memset(&dm_bufio_caches, 0, sizeof dm_bufio_caches);
memset(&dm_bufio_cache_names, 0, sizeof dm_bufio_cache_names);
mem = (__u64)((totalram_pages - totalhigh_pages) *
DM_BUFIO_MEMORY_PERCENT / 100) << PAGE_SHIFT;
mem = (__u64)mult_frac(totalram_pages - totalhigh_pages,
DM_BUFIO_MEMORY_PERCENT, 100) << PAGE_SHIFT;
if (mem > ULONG_MAX)
mem = ULONG_MAX;
#ifdef CONFIG_MMU
/*
* Get the size of vmalloc space the same way as VMALLOC_TOTAL
* in fs/proc/internal.h
*/
if (mem > (VMALLOC_END - VMALLOC_START) * DM_BUFIO_VMALLOC_PERCENT / 100)
mem = (VMALLOC_END - VMALLOC_START) * DM_BUFIO_VMALLOC_PERCENT / 100;
if (mem > mult_frac(VMALLOC_TOTAL, DM_BUFIO_VMALLOC_PERCENT, 100))
mem = mult_frac(VMALLOC_TOTAL, DM_BUFIO_VMALLOC_PERCENT, 100);
#endif
dm_bufio_default_cache_size = mem;

1
drivers/md/dm-era-target.c
View File

@ -1513,7 +1513,6 @@ static int era_ctr(struct dm_target *ti, unsigned argc, char **argv)
ti->flush_supported = true;
ti->num_discard_bios = 1;
ti->discards_supported = true;
era->callbacks.congested_fn = era_is_congested;
dm_table_add_target_callbacks(ti->table, &era->callbacks);

2
drivers/md/dm-mpath.c
View File

@ -499,8 +499,6 @@ static int multipath_clone_and_map(struct dm_target *ti, struct request *rq,
if (IS_ERR(clone)) {
/* EBUSY, ENODEV or EWOULDBLOCK: requeue */
bool queue_dying = blk_queue_dying(q);
DMERR_LIMIT("blk_get_request() returned %ld%s - requeuing",
PTR_ERR(clone), queue_dying ? " (path offline)" : "");
if (queue_dying) {
atomic_inc(&m->pg_init_in_progress);
activate_or_offline_path(pgpath);

6
drivers/md/dm-raid.c
View File

@ -2887,9 +2887,6 @@ static void configure_discard_support(struct raid_set *rs)
bool raid456;
struct dm_target *ti = rs->ti;
/* Assume discards not supported until after checks below. */
ti->discards_supported = false;
/*
* XXX: RAID level 4,5,6 require zeroing for safety.
*/
@ -2914,9 +2911,6 @@ static void configure_discard_support(struct raid_set *rs)
}
}
/* All RAID members properly support discards */
ti->discards_supported = true;
/*
* RAID1 and RAID10 personalities require bio splitting,
* RAID0/4/5/6 don't and process large discard bios properly.

43
drivers/md/dm-table.c
View File

@ -1758,13 +1758,12 @@ static bool dm_table_supports_write_zeroes(struct dm_table *t)
return true;
}
static int device_discard_capable(struct dm_target *ti, struct dm_dev *dev,
sector_t start, sector_t len, void *data)
static int device_not_discard_capable(struct dm_target *ti, struct dm_dev *dev,
sector_t start, sector_t len, void *data)
{
struct request_queue *q = bdev_get_queue(dev->bdev);
return q && blk_queue_discard(q);
return q && !blk_queue_discard(q);
}
static bool dm_table_supports_discards(struct dm_table *t)
@ -1772,28 +1771,24 @@ static bool dm_table_supports_discards(struct dm_table *t)
struct dm_target *ti;
unsigned i;
/*
* Unless any target used by the table set discards_supported,
* require at least one underlying device to support discards.
* t->devices includes internal dm devices such as mirror logs
* so we need to use iterate_devices here, which targets
* supporting discard selectively must provide.
*/
for (i = 0; i < dm_table_get_num_targets(t); i++) {
ti = dm_table_get_target(t, i);
if (!ti->num_discard_bios)
continue;
return false;
if (ti->discards_supported)
return true;
if (ti->type->iterate_devices &&
ti->type->iterate_devices(ti, device_discard_capable, NULL))
return true;
/*
* Either the target provides discard support (as implied by setting
* 'discards_supported') or it relies on _all_ data devices having
* discard support.
*/
if (!ti->discards_supported &&
(!ti->type->iterate_devices ||
ti->type->iterate_devices(ti, device_not_discard_capable, NULL)))
return false;
}
return false;
return true;
}
void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
@ -1806,9 +1801,15 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
*/
q->limits = *limits;
if (!dm_table_supports_discards(t))
if (!dm_table_supports_discards(t)) {
queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q);
else
/* Must also clear discard limits... */
q->limits.max_discard_sectors = 0;
q->limits.max_hw_discard_sectors = 0;
q->limits.discard_granularity = 0;
q->limits.discard_alignment = 0;
q->limits.discard_misaligned = 0;
} else
queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q);
if (dm_table_supports_flush(t, (1UL << QUEUE_FLAG_WC))) {