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author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-10 13:06:15 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-10 13:06:15 -0700 |
commit | 7426d62871dafbeeed087d609c6469a515c88389 (patch) | |
tree | 7d935f360eeb5e78ba633238a29e9213c291aad7 /drivers/md/dm-table.c | |
parent | 4d7696f1b05f4aeb586c74868fe3da2731daca4b (diff) | |
parent | 7fff5e8f727285cf54e6aba10f31b196f207b98a (diff) | |
download | op-kernel-dev-7426d62871dafbeeed087d609c6469a515c88389.zip op-kernel-dev-7426d62871dafbeeed087d609c6469a515c88389.tar.gz |
Merge tag 'dm-3.12-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device-mapper updates from Mike Snitzer:
"Add the ability to collect I/O statistics on user-defined regions of a
device-mapper device. This dm-stats code required the reintroduction
of a div64_u64_rem() helper, but as a separate method that doesn't
slow down div64_u64() -- especially on 32-bit systems.
Allow the error target to replace request-based DM devices (e.g.
multipath) in addition to bio-based DM devices.
Various other small code fixes and improvements to thin-provisioning,
DM cache and the DM ioctl interface"
* tag 'dm-3.12-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm stripe: silence a couple sparse warnings
dm: add statistics support
dm thin: always return -ENOSPC if no_free_space is set
dm ioctl: cleanup error handling in table_load
dm ioctl: increase granularity of type_lock when loading table
dm ioctl: prevent rename to empty name or uuid
dm thin: set pool read-only if breaking_sharing fails block allocation
dm thin: prefix pool error messages with pool device name
dm: allow error target to replace bio-based and request-based targets
math64: New separate div64_u64_rem helper
dm space map: optimise sm_ll_dec and sm_ll_inc
dm btree: prefetch child nodes when walking tree for a dm_btree_del
dm btree: use pop_frame in dm_btree_del to cleanup code
dm cache: eliminate holes in cache structure
dm cache: fix stacking of geometry limits
dm thin: fix stacking of geometry limits
dm thin: add data block size limits to Documentation
dm cache: add data block size limits to code and Documentation
dm cache: document metadata device is exclussive to a cache
dm: stop using WQ_NON_REENTRANT
Diffstat (limited to 'drivers/md/dm-table.c')
-rw-r--r-- | drivers/md/dm-table.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index f221812..8f87835 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -860,14 +860,17 @@ EXPORT_SYMBOL(dm_consume_args); static int dm_table_set_type(struct dm_table *t) { unsigned i; - unsigned bio_based = 0, request_based = 0; + unsigned bio_based = 0, request_based = 0, hybrid = 0; struct dm_target *tgt; struct dm_dev_internal *dd; struct list_head *devices; + unsigned live_md_type; for (i = 0; i < t->num_targets; i++) { tgt = t->targets + i; - if (dm_target_request_based(tgt)) + if (dm_target_hybrid(tgt)) + hybrid = 1; + else if (dm_target_request_based(tgt)) request_based = 1; else bio_based = 1; @@ -879,6 +882,19 @@ static int dm_table_set_type(struct dm_table *t) } } + if (hybrid && !bio_based && !request_based) { + /* + * The targets can work either way. + * Determine the type from the live device. + * Default to bio-based if device is new. + */ + live_md_type = dm_get_md_type(t->md); + if (live_md_type == DM_TYPE_REQUEST_BASED) + request_based = 1; + else + bio_based = 1; + } + if (bio_based) { /* We must use this table as bio-based */ t->type = DM_TYPE_BIO_BASED; |