- A few DM integrity fixes that improve performance. One that address
inefficiencies in the on-disk journal device layout. Another that makes use of the block layer's on-stack plugging when writing the journal. - A dm-bufio fix for the blk_status_t conversion that went in during the merge window. - A few DM raid fixes that address correctness when suspending the device and a validation fix for validation that occurs during device activation. - A couple DM zoned target fixes. Important one being the fix to not use GFP_KERNEL in the IO path due to concerns about deadlock in low-memory conditions (e.g. swap over a DM zoned device, etc). - A DM DAX device fix to make sure dm_dax_flush() is called if the underlying DAX device is operating as a write cache. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQEcBAABAgAGBQJZe13OAAoJEMUj8QotnQNav/gIAMXMUbXlYHVikVNq+6rNkXRk FlsltNcJEDeZCit0nJd/2nOWGpssXdz+7cJTUU28Kp+3IscIolSHS51bzfSFI05V 7LbYqEX1EdXkTwEeYfHlAoOexvj4oarpAWWQF/ACU8rHCruaqfqIa57mstxLoyDY XcxsIY/fds6GZViLB0MD/jBAKaLWX90aFZ9MQcF7AmdpMr56kCO2PUhiqHcrN47t BjH7E5QSKGl2pMND1bR6pleWFw8HB7h82Qjaasd5bQuVWseQ4u9Illxny6bhhk2E BiEWjzFvZB+JL1zl7JIXnBjhdmbwgAVvoW6EqHuVzHuR0X8gylBF2gDLnSzUZu4= =3MxS -----END PGP SIGNATURE----- Merge tag 'for-4.13/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm Pull device mapper fixes from Mike Snitzer: - a few DM integrity fixes that improve performance. One that address inefficiencies in the on-disk journal device layout. Another that makes use of the block layer's on-stack plugging when writing the journal. - a dm-bufio fix for the blk_status_t conversion that went in during the merge window. - a few DM raid fixes that address correctness when suspending the device and a validation fix for validation that occurs during device activation. - a couple DM zoned target fixes. Important one being the fix to not use GFP_KERNEL in the IO path due to concerns about deadlock in low-memory conditions (e.g. swap over a DM zoned device, etc). - a DM DAX device fix to make sure dm_dax_flush() is called if the underlying DAX device is operating as a write cache. * tag 'for-4.13/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: dm, dax: Make sure dm_dax_flush() is called if device supports it dm verity fec: fix GFP flags used with mempool_alloc() dm zoned: use GFP_NOIO in I/O path dm zoned: remove test for impossible REQ_OP_FLUSH conditions dm raid: bump target version dm raid: avoid mddev->suspended access dm raid: fix activation check in validate_raid_redundancy() dm raid: remove WARN_ON() in raid10_md_layout_to_format() dm bufio: fix error code in dm_bufio_write_dirty_buffers() dm integrity: test for corrupted disk format during table load dm integrity: WARN_ON if variables representing journal usage get out of sync dm integrity: use plugging when writing the journal dm integrity: fix inefficient allocation of journal space
This commit is contained in:
Linus Torvalds
commit
1731a47444
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@ -343,3 +343,4 @@ Version History
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1.11.0 Fix table line argument order
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(wrong raid10_copies/raid10_format sequence)
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1.11.1 Add raid4/5/6 journal write-back support via journal_mode option
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1.12.1 fix for MD deadlock between mddev_suspend() and md_write_start() available
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@ -278,6 +278,12 @@ void dax_write_cache(struct dax_device *dax_dev, bool wc)
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}
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EXPORT_SYMBOL_GPL(dax_write_cache);
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bool dax_write_cache_enabled(struct dax_device *dax_dev)
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{
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return test_bit(DAXDEV_WRITE_CACHE, &dax_dev->flags);
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}
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EXPORT_SYMBOL_GPL(dax_write_cache_enabled);
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bool dax_alive(struct dax_device *dax_dev)
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{
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lockdep_assert_held(&dax_srcu);
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@ -1258,8 +1258,7 @@ EXPORT_SYMBOL_GPL(dm_bufio_write_dirty_buffers_async);
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*/
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int dm_bufio_write_dirty_buffers(struct dm_bufio_client *c)
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{
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blk_status_t a;
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int f;
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int a, f;
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unsigned long buffers_processed = 0;
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struct dm_buffer *b, *tmp;
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@ -1587,16 +1587,18 @@ static void dm_integrity_map_continue(struct dm_integrity_io *dio, bool from_map
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if (likely(ic->mode == 'J')) {
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if (dio->write) {
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unsigned next_entry, i, pos;
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unsigned ws, we;
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unsigned ws, we, range_sectors;
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dio->range.n_sectors = min(dio->range.n_sectors, ic->free_sectors);
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dio->range.n_sectors = min(dio->range.n_sectors,
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ic->free_sectors << ic->sb->log2_sectors_per_block);
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if (unlikely(!dio->range.n_sectors))
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goto sleep;
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ic->free_sectors -= dio->range.n_sectors;
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range_sectors = dio->range.n_sectors >> ic->sb->log2_sectors_per_block;
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ic->free_sectors -= range_sectors;
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journal_section = ic->free_section;
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journal_entry = ic->free_section_entry;
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next_entry = ic->free_section_entry + dio->range.n_sectors;
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next_entry = ic->free_section_entry + range_sectors;
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ic->free_section_entry = next_entry % ic->journal_section_entries;
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ic->free_section += next_entry / ic->journal_section_entries;
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ic->n_uncommitted_sections += next_entry / ic->journal_section_entries;
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@ -1727,6 +1729,8 @@ static void pad_uncommitted(struct dm_integrity_c *ic)
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wraparound_section(ic, &ic->free_section);
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ic->n_uncommitted_sections++;
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}
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WARN_ON(ic->journal_sections * ic->journal_section_entries !=
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(ic->n_uncommitted_sections + ic->n_committed_sections) * ic->journal_section_entries + ic->free_sectors);
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}
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static void integrity_commit(struct work_struct *w)
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@ -1821,6 +1825,9 @@ static void do_journal_write(struct dm_integrity_c *ic, unsigned write_start,
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{
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unsigned i, j, n;
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struct journal_completion comp;
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struct blk_plug plug;
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blk_start_plug(&plug);
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comp.ic = ic;
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comp.in_flight = (atomic_t)ATOMIC_INIT(1);
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@ -1945,6 +1952,8 @@ static void do_journal_write(struct dm_integrity_c *ic, unsigned write_start,
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dm_bufio_write_dirty_buffers_async(ic->bufio);
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blk_finish_plug(&plug);
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complete_journal_op(&comp);
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wait_for_completion_io(&comp.comp);
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@ -3019,6 +3028,11 @@ static int dm_integrity_ctr(struct dm_target *ti, unsigned argc, char **argv)
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ti->error = "Block size doesn't match the information in superblock";
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goto bad;
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}
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if (!le32_to_cpu(ic->sb->journal_sections)) {
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r = -EINVAL;
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ti->error = "Corrupted superblock, journal_sections is 0";
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goto bad;
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}
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/* make sure that ti->max_io_len doesn't overflow */
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if (ic->sb->log2_interleave_sectors < MIN_LOG2_INTERLEAVE_SECTORS ||
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ic->sb->log2_interleave_sectors > MAX_LOG2_INTERLEAVE_SECTORS) {
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@ -208,6 +208,7 @@ struct raid_dev {
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#define RT_FLAG_RS_BITMAP_LOADED 2
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#define RT_FLAG_UPDATE_SBS 3
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#define RT_FLAG_RESHAPE_RS 4
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#define RT_FLAG_RS_SUSPENDED 5
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/* Array elements of 64 bit needed for rebuild/failed disk bits */
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#define DISKS_ARRAY_ELEMS ((MAX_RAID_DEVICES + (sizeof(uint64_t) * 8 - 1)) / sizeof(uint64_t) / 8)
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@ -564,9 +565,10 @@ static const char *raid10_md_layout_to_format(int layout)
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if (__raid10_near_copies(layout) > 1)
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return "near";
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WARN_ON(__raid10_far_copies(layout) < 2);
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if (__raid10_far_copies(layout) > 1)
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return "far";
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return "unknown";
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}
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/* Return md raid10 algorithm for @name */
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@ -2540,11 +2542,6 @@ static int analyse_superblocks(struct dm_target *ti, struct raid_set *rs)
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if (!freshest)
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return 0;
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if (validate_raid_redundancy(rs)) {
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rs->ti->error = "Insufficient redundancy to activate array";
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return -EINVAL;
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}
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/*
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* Validation of the freshest device provides the source of
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* validation for the remaining devices.
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@ -2553,6 +2550,11 @@ static int analyse_superblocks(struct dm_target *ti, struct raid_set *rs)
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if (super_validate(rs, freshest))
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return -EINVAL;
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if (validate_raid_redundancy(rs)) {
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rs->ti->error = "Insufficient redundancy to activate array";
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return -EINVAL;
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}
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rdev_for_each(rdev, mddev)
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if (!test_bit(Journal, &rdev->flags) &&
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rdev != freshest &&
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@ -3168,6 +3170,7 @@ static int raid_ctr(struct dm_target *ti, unsigned int argc, char **argv)
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}
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mddev_suspend(&rs->md);
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set_bit(RT_FLAG_RS_SUSPENDED, &rs->runtime_flags);
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/* Try to adjust the raid4/5/6 stripe cache size to the stripe size */
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if (rs_is_raid456(rs)) {
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@ -3625,7 +3628,7 @@ static void raid_postsuspend(struct dm_target *ti)
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{
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struct raid_set *rs = ti->private;
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if (!rs->md.suspended)
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if (!test_and_set_bit(RT_FLAG_RS_SUSPENDED, &rs->runtime_flags))
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mddev_suspend(&rs->md);
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rs->md.ro = 1;
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@ -3759,7 +3762,7 @@ static int rs_start_reshape(struct raid_set *rs)
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return r;
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/* Need to be resumed to be able to start reshape, recovery is frozen until raid_resume() though */
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if (mddev->suspended)
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if (test_and_clear_bit(RT_FLAG_RS_SUSPENDED, &rs->runtime_flags))
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mddev_resume(mddev);
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/*
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@ -3786,7 +3789,7 @@ static int rs_start_reshape(struct raid_set *rs)
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}
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/* Suspend because a resume will happen in raid_resume() */
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if (!mddev->suspended)
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set_bit(RT_FLAG_RS_SUSPENDED, &rs->runtime_flags);
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mddev_suspend(mddev);
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/*
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@ -3883,13 +3886,13 @@ static void raid_resume(struct dm_target *ti)
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if (!(rs->ctr_flags & RESUME_STAY_FROZEN_FLAGS))
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clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
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|
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if (mddev->suspended)
|
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if (test_and_clear_bit(RT_FLAG_RS_SUSPENDED, &rs->runtime_flags))
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mddev_resume(mddev);
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}
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|
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static struct target_type raid_target = {
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.name = "raid",
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.version = {1, 11, 1},
|
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.version = {1, 12, 1},
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.module = THIS_MODULE,
|
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.ctr = raid_ctr,
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.dtr = raid_dtr,
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|
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|||
|
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@ -20,6 +20,7 @@
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|||
#include <linux/atomic.h>
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#include <linux/blk-mq.h>
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#include <linux/mount.h>
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#include <linux/dax.h>
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|
||||
#define DM_MSG_PREFIX "table"
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|
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@ -1630,6 +1631,37 @@ static bool dm_table_supports_flush(struct dm_table *t, unsigned long flush)
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return false;
|
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}
|
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static int device_dax_write_cache_enabled(struct dm_target *ti,
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struct dm_dev *dev, sector_t start,
|
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sector_t len, void *data)
|
||||
{
|
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struct dax_device *dax_dev = dev->dax_dev;
|
||||
|
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if (!dax_dev)
|
||||
return false;
|
||||
|
||||
if (dax_write_cache_enabled(dax_dev))
|
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return true;
|
||||
return false;
|
||||
}
|
||||
|
||||
static int dm_table_supports_dax_write_cache(struct dm_table *t)
|
||||
{
|
||||
struct dm_target *ti;
|
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unsigned i;
|
||||
|
||||
for (i = 0; i < dm_table_get_num_targets(t); i++) {
|
||||
ti = dm_table_get_target(t, i);
|
||||
|
||||
if (ti->type->iterate_devices &&
|
||||
ti->type->iterate_devices(ti,
|
||||
device_dax_write_cache_enabled, NULL))
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
static int device_is_nonrot(struct dm_target *ti, struct dm_dev *dev,
|
||||
sector_t start, sector_t len, void *data)
|
||||
{
|
||||
|
|
@ -1785,6 +1817,9 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
|
|||
}
|
||||
blk_queue_write_cache(q, wc, fua);
|
||||
|
||||
if (dm_table_supports_dax_write_cache(t))
|
||||
dax_write_cache(t->md->dax_dev, true);
|
||||
|
||||
/* Ensure that all underlying devices are non-rotational. */
|
||||
if (dm_table_all_devices_attribute(t, device_is_nonrot))
|
||||
queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
|
||||
|
|
|
|||
|
|
@ -308,19 +308,14 @@ static int fec_alloc_bufs(struct dm_verity *v, struct dm_verity_fec_io *fio)
|
|||
{
|
||||
unsigned n;
|
||||
|
||||
if (!fio->rs) {
|
||||
fio->rs = mempool_alloc(v->fec->rs_pool, 0);
|
||||
if (unlikely(!fio->rs)) {
|
||||
DMERR("failed to allocate RS");
|
||||
return -ENOMEM;
|
||||
}
|
||||
}
|
||||
if (!fio->rs)
|
||||
fio->rs = mempool_alloc(v->fec->rs_pool, GFP_NOIO);
|
||||
|
||||
fec_for_each_prealloc_buffer(n) {
|
||||
if (fio->bufs[n])
|
||||
continue;
|
||||
|
||||
fio->bufs[n] = mempool_alloc(v->fec->prealloc_pool, GFP_NOIO);
|
||||
fio->bufs[n] = mempool_alloc(v->fec->prealloc_pool, GFP_NOWAIT);
|
||||
if (unlikely(!fio->bufs[n])) {
|
||||
DMERR("failed to allocate FEC buffer");
|
||||
return -ENOMEM;
|
||||
|
|
@ -332,22 +327,16 @@ static int fec_alloc_bufs(struct dm_verity *v, struct dm_verity_fec_io *fio)
|
|||
if (fio->bufs[n])
|
||||
continue;
|
||||
|
||||
fio->bufs[n] = mempool_alloc(v->fec->extra_pool, GFP_NOIO);
|
||||
fio->bufs[n] = mempool_alloc(v->fec->extra_pool, GFP_NOWAIT);
|
||||
/* we can manage with even one buffer if necessary */
|
||||
if (unlikely(!fio->bufs[n]))
|
||||
break;
|
||||
}
|
||||
fio->nbufs = n;
|
||||
|
||||
if (!fio->output) {
|
||||
if (!fio->output)
|
||||
fio->output = mempool_alloc(v->fec->output_pool, GFP_NOIO);
|
||||
|
||||
if (!fio->output) {
|
||||
DMERR("failed to allocate FEC page");
|
||||
return -ENOMEM;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -624,7 +624,7 @@ static int dmz_write_sb(struct dmz_metadata *zmd, unsigned int set)
|
|||
|
||||
ret = dmz_rdwr_block(zmd, REQ_OP_WRITE, block, mblk->page);
|
||||
if (ret == 0)
|
||||
ret = blkdev_issue_flush(zmd->dev->bdev, GFP_KERNEL, NULL);
|
||||
ret = blkdev_issue_flush(zmd->dev->bdev, GFP_NOIO, NULL);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
|
@ -658,7 +658,7 @@ static int dmz_write_dirty_mblocks(struct dmz_metadata *zmd,
|
|||
|
||||
/* Flush drive cache (this will also sync data) */
|
||||
if (ret == 0)
|
||||
ret = blkdev_issue_flush(zmd->dev->bdev, GFP_KERNEL, NULL);
|
||||
ret = blkdev_issue_flush(zmd->dev->bdev, GFP_NOIO, NULL);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
|
@ -722,7 +722,7 @@ int dmz_flush_metadata(struct dmz_metadata *zmd)
|
|||
|
||||
/* If there are no dirty metadata blocks, just flush the device cache */
|
||||
if (list_empty(&write_list)) {
|
||||
ret = blkdev_issue_flush(zmd->dev->bdev, GFP_KERNEL, NULL);
|
||||
ret = blkdev_issue_flush(zmd->dev->bdev, GFP_NOIO, NULL);
|
||||
goto out;
|
||||
}
|
||||
|
||||
|
|
@ -927,7 +927,7 @@ static int dmz_recover_mblocks(struct dmz_metadata *zmd, unsigned int dst_set)
|
|||
(zmd->nr_meta_zones << zmd->dev->zone_nr_blocks_shift);
|
||||
}
|
||||
|
||||
page = alloc_page(GFP_KERNEL);
|
||||
page = alloc_page(GFP_NOIO);
|
||||
if (!page)
|
||||
return -ENOMEM;
|
||||
|
||||
|
|
@ -1183,7 +1183,7 @@ static int dmz_update_zone(struct dmz_metadata *zmd, struct dm_zone *zone)
|
|||
|
||||
/* Get zone information from disk */
|
||||
ret = blkdev_report_zones(zmd->dev->bdev, dmz_start_sect(zmd, zone),
|
||||
&blkz, &nr_blkz, GFP_KERNEL);
|
||||
&blkz, &nr_blkz, GFP_NOIO);
|
||||
if (ret) {
|
||||
dmz_dev_err(zmd->dev, "Get zone %u report failed",
|
||||
dmz_id(zmd, zone));
|
||||
|
|
@ -1257,7 +1257,7 @@ static int dmz_reset_zone(struct dmz_metadata *zmd, struct dm_zone *zone)
|
|||
|
||||
ret = blkdev_reset_zones(dev->bdev,
|
||||
dmz_start_sect(zmd, zone),
|
||||
dev->zone_nr_sectors, GFP_KERNEL);
|
||||
dev->zone_nr_sectors, GFP_NOIO);
|
||||
if (ret) {
|
||||
dmz_dev_err(dev, "Reset zone %u failed %d",
|
||||
dmz_id(zmd, zone), ret);
|
||||
|
|
|
|||
|
|
@ -75,7 +75,7 @@ static int dmz_reclaim_align_wp(struct dmz_reclaim *zrc, struct dm_zone *zone,
|
|||
nr_blocks = block - wp_block;
|
||||
ret = blkdev_issue_zeroout(zrc->dev->bdev,
|
||||
dmz_start_sect(zmd, zone) + dmz_blk2sect(wp_block),
|
||||
dmz_blk2sect(nr_blocks), GFP_NOFS, false);
|
||||
dmz_blk2sect(nr_blocks), GFP_NOIO, 0);
|
||||
if (ret) {
|
||||
dmz_dev_err(zrc->dev,
|
||||
"Align zone %u wp %llu to %llu (wp+%u) blocks failed %d",
|
||||
|
|
|
|||
|
|
@ -541,7 +541,7 @@ static void dmz_queue_chunk_work(struct dmz_target *dmz, struct bio *bio)
|
|||
int ret;
|
||||
|
||||
/* Create a new chunk work */
|
||||
cw = kmalloc(sizeof(struct dm_chunk_work), GFP_NOFS);
|
||||
cw = kmalloc(sizeof(struct dm_chunk_work), GFP_NOIO);
|
||||
if (!cw)
|
||||
goto out;
|
||||
|
||||
|
|
@ -588,7 +588,7 @@ static int dmz_map(struct dm_target *ti, struct bio *bio)
|
|||
|
||||
bio->bi_bdev = dev->bdev;
|
||||
|
||||
if (!nr_sectors && (bio_op(bio) != REQ_OP_FLUSH) && (bio_op(bio) != REQ_OP_WRITE))
|
||||
if (!nr_sectors && bio_op(bio) != REQ_OP_WRITE)
|
||||
return DM_MAPIO_REMAPPED;
|
||||
|
||||
/* The BIO should be block aligned */
|
||||
|
|
@ -603,7 +603,7 @@ static int dmz_map(struct dm_target *ti, struct bio *bio)
|
|||
bioctx->status = BLK_STS_OK;
|
||||
|
||||
/* Set the BIO pending in the flush list */
|
||||
if (bio_op(bio) == REQ_OP_FLUSH || (!nr_sectors && bio_op(bio) == REQ_OP_WRITE)) {
|
||||
if (!nr_sectors && bio_op(bio) == REQ_OP_WRITE) {
|
||||
spin_lock(&dmz->flush_lock);
|
||||
bio_list_add(&dmz->flush_list, bio);
|
||||
spin_unlock(&dmz->flush_lock);
|
||||
|
|
@ -785,7 +785,7 @@ static int dmz_ctr(struct dm_target *ti, unsigned int argc, char **argv)
|
|||
|
||||
/* Chunk BIO work */
|
||||
mutex_init(&dmz->chunk_lock);
|
||||
INIT_RADIX_TREE(&dmz->chunk_rxtree, GFP_NOFS);
|
||||
INIT_RADIX_TREE(&dmz->chunk_rxtree, GFP_KERNEL);
|
||||
dmz->chunk_wq = alloc_workqueue("dmz_cwq_%s", WQ_MEM_RECLAIM | WQ_UNBOUND,
|
||||
0, dev->name);
|
||||
if (!dmz->chunk_wq) {
|
||||
|
|
|
|||
|
|
@ -87,6 +87,7 @@ size_t dax_copy_from_iter(struct dax_device *dax_dev, pgoff_t pgoff, void *addr,
|
|||
void dax_flush(struct dax_device *dax_dev, pgoff_t pgoff, void *addr,
|
||||
size_t size);
|
||||
void dax_write_cache(struct dax_device *dax_dev, bool wc);
|
||||
bool dax_write_cache_enabled(struct dax_device *dax_dev);
|
||||
|
||||
/*
|
||||
* We use lowest available bit in exceptional entry for locking, one bit for
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user