diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-28 12:55:04 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-28 12:55:04 -0700 |
commit | 89e5d6f0d979f6e7dc2bbb1ebd9e239217e2e952 (patch) | |
tree | 1126044004b73df905a6183430376f1d97c3b6c9 /drivers | |
parent | 516e77977085c9c50703fabb5dc61bd57a8cc1d0 (diff) | |
parent | a4ffc152198efba2ed9e6eac0eb97f17bfebce85 (diff) |
Merge tag 'dm-3.4-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-dm
Pull device-mapper changes for 3.4 from Alasdair Kergon:
- Update thin provisioning to support read-only external snapshot
origins and discards.
- A new target, dm verity, for device content validation.
- Mark dm uevent and dm raid as no-longer-experimental.
- Miscellaneous other fixes and clean-ups.
* tag 'dm-3.4-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-dm: (27 commits)
dm: add verity target
dm bufio: prefetch
dm thin: add pool target flags to control discard
dm thin: support discards
dm thin: prepare to support discard
dm thin: use dm_target_offset
dm thin: support read only external snapshot origins
dm thin: relax hard limit on the maximum size of a metadata device
dm persistent data: remove space map ref_count entries if redundant
dm thin: commit outstanding data every second
dm: reject trailing characters in sccanf input
dm raid: handle failed devices during start up
dm thin metadata: pass correct space map to dm_sm_root_size
dm persistent data: remove redundant value_size arg from value_ptr
dm mpath: detect invalid map_context
dm: clear bi_end_io on remapping failure
dm table: simplify call to free_devices
dm thin: correct comments
dm raid: no longer experimental
dm uevent: no longer experimental
...
Diffstat (limited to 'drivers')
28 files changed, 1831 insertions, 376 deletions
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig index faa4741df6d3..10f122a3a856 100644 --- a/drivers/md/Kconfig +++ b/drivers/md/Kconfig @@ -277,8 +277,8 @@ config DM_MIRROR needed for live data migration tools such as 'pvmove'. config DM_RAID - tristate "RAID 1/4/5/6 target (EXPERIMENTAL)" - depends on BLK_DEV_DM && EXPERIMENTAL + tristate "RAID 1/4/5/6 target" + depends on BLK_DEV_DM select MD_RAID1 select MD_RAID456 select BLK_DEV_MD @@ -359,8 +359,8 @@ config DM_DELAY If unsure, say N. config DM_UEVENT - bool "DM uevents (EXPERIMENTAL)" - depends on BLK_DEV_DM && EXPERIMENTAL + bool "DM uevents" + depends on BLK_DEV_DM ---help--- Generate udev events for DM events. @@ -370,4 +370,24 @@ config DM_FLAKEY ---help--- A target that intermittently fails I/O for debugging purposes. +config DM_VERITY + tristate "Verity target support (EXPERIMENTAL)" + depends on BLK_DEV_DM && EXPERIMENTAL + select CRYPTO + select CRYPTO_HASH + select DM_BUFIO + ---help--- + This device-mapper target creates a read-only device that + transparently validates the data on one underlying device against + a pre-generated tree of cryptographic checksums stored on a second + device. + + You'll need to activate the digests you're going to use in the + cryptoapi configuration. + + To compile this code as a module, choose M here: the module will + be called dm-verity. + + If unsure, say N. + endif # MD diff --git a/drivers/md/Makefile b/drivers/md/Makefile index 046860c7a166..8b2e0dffe82e 100644 --- a/drivers/md/Makefile +++ b/drivers/md/Makefile @@ -42,6 +42,7 @@ obj-$(CONFIG_DM_LOG_USERSPACE) += dm-log-userspace.o obj-$(CONFIG_DM_ZERO) += dm-zero.o obj-$(CONFIG_DM_RAID) += dm-raid.o obj-$(CONFIG_DM_THIN_PROVISIONING) += dm-thin-pool.o +obj-$(CONFIG_DM_VERITY) += dm-verity.o ifeq ($(CONFIG_DM_UEVENT),y) dm-mod-objs += dm-uevent.o diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c index b6e58c7b6df5..cc06a1e52423 100644 --- a/drivers/md/dm-bufio.c +++ b/drivers/md/dm-bufio.c @@ -578,7 +578,7 @@ static void write_endio(struct bio *bio, int error) struct dm_buffer *b = container_of(bio, struct dm_buffer, bio); b->write_error = error; - if (error) { + if (unlikely(error)) { struct dm_bufio_client *c = b->c; (void)cmpxchg(&c->async_write_error, 0, error); } @@ -697,13 +697,20 @@ static void __wait_for_free_buffer(struct dm_bufio_client *c) dm_bufio_lock(c); } +enum new_flag { + NF_FRESH = 0, + NF_READ = 1, + NF_GET = 2, + NF_PREFETCH = 3 +}; + /* * Allocate a new buffer. If the allocation is not possible, wait until * some other thread frees a buffer. * * May drop the lock and regain it. */ -static struct dm_buffer *__alloc_buffer_wait_no_callback(struct dm_bufio_client *c) +static struct dm_buffer *__alloc_buffer_wait_no_callback(struct dm_bufio_client *c, enum new_flag nf) { struct dm_buffer *b; @@ -726,6 +733,9 @@ static struct dm_buffer *__alloc_buffer_wait_no_callback(struct dm_bufio_client return b; } + if (nf == NF_PREFETCH) + return NULL; + if (!list_empty(&c->reserved_buffers)) { b = list_entry(c->reserved_buffers.next, struct dm_buffer, lru_list); @@ -743,9 +753,12 @@ static struct dm_buffer *__alloc_buffer_wait_no_callback(struct dm_bufio_client } } -static struct dm_buffer *__alloc_buffer_wait(struct dm_bufio_client *c) +static struct dm_buffer *__alloc_buffer_wait(struct dm_bufio_client *c, enum new_flag nf) { - struct dm_buffer *b = __alloc_buffer_wait_no_callback(c); + struct dm_buffer *b = __alloc_buffer_wait_no_callback(c, nf); + + if (!b) + return NULL; if (c->alloc_callback) c->alloc_callback(b); @@ -865,32 +878,23 @@ static struct dm_buffer *__find(struct dm_bufio_client *c, sector_t block) * Getting a buffer *--------------------------------------------------------------*/ -enum new_flag { - NF_FRESH = 0, - NF_READ = 1, - NF_GET = 2 -}; - static struct dm_buffer *__bufio_new(struct dm_bufio_client *c, sector_t block, - enum new_flag nf, struct dm_buffer **bp, - int *need_submit) + enum new_flag nf, int *need_submit) { struct dm_buffer *b, *new_b = NULL; *need_submit = 0; b = __find(c, block); - if (b) { - b->hold_count++; - __relink_lru(b, test_bit(B_DIRTY, &b->state) || - test_bit(B_WRITING, &b->state)); - return b; - } + if (b) + goto found_buffer; if (nf == NF_GET) return NULL; - new_b = __alloc_buffer_wait(c); + new_b = __alloc_buffer_wait(c, nf); + if (!new_b) + return NULL; /* * We've had a period where the mutex was unlocked, so need to @@ -899,10 +903,7 @@ static struct dm_buffer *__bufio_new(struct dm_bufio_client *c, sector_t block, b = __find(c, block); if (b) { __free_buffer_wake(new_b); - b->hold_count++; - __relink_lru(b, test_bit(B_DIRTY, &b->state) || - test_bit(B_WRITING, &b->state)); - return b; + goto found_buffer; } __check_watermark(c); @@ -922,6 +923,24 @@ static struct dm_buffer *__bufio_new(struct dm_bufio_client *c, sector_t block, *need_submit = 1; return b; + +found_buffer: + if (nf == NF_PREFETCH) + return NULL; + /* + * Note: it is essential that we don't wait for the buffer to be + * read if dm_bufio_get function is used. Both dm_bufio_get and + * dm_bufio_prefetch can be used in the driver request routine. + * If the user called both dm_bufio_prefetch and dm_bufio_get on + * the same buffer, it would deadlock if we waited. + */ + if (nf == NF_GET && unlikely(test_bit(B_READING, &b->state))) + return NULL; + + b->hold_count++; + __relink_lru(b, test_bit(B_DIRTY, &b->state) || + test_bit(B_WRITING, &b->state)); + return b; } /* @@ -956,10 +975,10 @@ static void *new_read(struct dm_bufio_client *c, sector_t block, struct dm_buffer *b; dm_bufio_lock(c); - b = __bufio_new(c, block, nf, bp, &need_submit); + b = __bufio_new(c, block, nf, &need_submit); dm_bufio_unlock(c); - if (!b || IS_ERR(b)) + if (!b) return b; if (need_submit) @@ -1005,13 +1024,47 @@ void *dm_bufio_new(struct dm_bufio_client *c, sector_t block, } EXPORT_SYMBOL_GPL(dm_bufio_new); +void dm_bufio_prefetch(struct dm_bufio_client *c, + sector_t block, unsigned n_blocks) +{ + struct blk_plug plug; + + blk_start_plug(&plug); + dm_bufio_lock(c); + + for (; n_blocks--; block++) { + int need_submit; + struct dm_buffer *b; + b = __bufio_new(c, block, NF_PREFETCH, &need_submit); + if (unlikely(b != NULL)) { + dm_bufio_unlock(c); + + if (need_submit) + submit_io(b, READ, b->block, read_endio); + dm_bufio_release(b); + + dm_bufio_cond_resched(); + + if (!n_blocks) + goto flush_plug; + dm_bufio_lock(c); + } + + } + + dm_bufio_unlock(c); + +flush_plug: + blk_finish_plug(&plug); +} +EXPORT_SYMBOL_GPL(dm_bufio_prefetch); + void dm_bufio_release(struct dm_buffer *b) { struct dm_bufio_client *c = b->c; dm_bufio_lock(c); - BUG_ON(test_bit(B_READING, &b->state)); BUG_ON(!b->hold_count); b->hold_count--; @@ -1024,6 +1077,7 @@ void dm_bufio_release(struct dm_buffer *b) * invalid buffer. */ if ((b->read_error || b->write_error) && + !test_bit(B_READING, &b->state) && !test_bit(B_WRITING, &b->state) && !test_bit(B_DIRTY, &b->state)) { __unlink_buffer(b); @@ -1041,6 +1095,8 @@ void dm_bufio_mark_buffer_dirty(struct dm_buffer *b) dm_bufio_lock(c); + BUG_ON(test_bit(B_READING, &b->state)); + if (!test_and_set_bit(B_DIRTY, &b->state)) __relink_lru(b, LIST_DIRTY); diff --git a/drivers/md/dm-bufio.h b/drivers/md/dm-bufio.h index 5c4c3a04e381..b142946a9e32 100644 --- a/drivers/md/dm-bufio.h +++ b/drivers/md/dm-bufio.h @@ -63,6 +63,14 @@ void *dm_bufio_new(struct dm_bufio_client *c, sector_t block, struct dm_buffer **bp); /* + * Prefetch the specified blocks to the cache. + * The function starts to read the blocks and returns without waiting for + * I/O to finish. + */ +void dm_bufio_prefetch(struct dm_bufio_client *c, + sector_t block, unsigned n_blocks); + +/* * Release a reference obtained with dm_bufio_{read,get,new}. The data * pointer and dm_buffer pointer is no longer valid after this call. */ diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index db6b51639cee..3f06df59fd82 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -176,7 +176,6 @@ struct crypt_config { #define MIN_IOS 16 #define MIN_POOL_PAGES 32 -#define MIN_BIO_PAGES 8 static struct kmem_cache *_crypt_io_pool; @@ -848,12 +847,11 @@ static struct bio *crypt_alloc_buffer(struct dm_crypt_io *io, unsigned size, } /* - * if additional pages cannot be allocated without waiting, - * return a partially allocated bio, the caller will then try - * to allocate additional bios while submitting this partial bio + * If additional pages cannot be allocated without waiting, + * return a partially-allocated bio. The caller will then try + * to allocate more bios while submitting this partial bio. */ - if (i == (MIN_BIO_PAGES - 1)) - gfp_mask = (gfp_mask | __GFP_NOWARN) & ~__GFP_WAIT; + gfp_mask = (gfp_mask | __GFP_NOWARN) & ~__GFP_WAIT; len = (size > PAGE_SIZE) ? PAGE_SIZE : size; @@ -1046,16 +1044,14 @@ static void kcryptd_queue_io(struct dm_crypt_io *io) queue_work(cc->io_queue, &io->work); } -static void kcryptd_crypt_write_io_submit(struct dm_crypt_io *io, - int error, int async) +static void kcryptd_crypt_write_io_submit(struct dm_crypt_io *io, int async) { struct bio *clone = io->ctx.bio_out; struct crypt_config *cc = io->target->private; - if (unlikely(error < 0)) { + if (unlikely(io->error < 0)) { crypt_free_buffer_pages(cc, clone); bio_put(clone); - io->error = -EIO; crypt_dec_pending(io); return; } @@ -1106,12 +1102,16 @@ static void kcryptd_crypt_write_convert(struct dm_crypt_io *io) sector += bio_sectors(clone); crypt_inc_pending(io); + r = crypt_convert(cc, &io->ctx); + if (r < 0) + io->error = -EIO; + crypt_finished = atomic_dec_and_test(&io->ctx.pending); /* Encryption was already finished, submit io now */ if (crypt_finished) { - kcryptd_crypt_write_io_submit(io, r, 0); + kcryptd_crypt_write_io_submit(io, 0); /* * If there was an error, do not try next fragments. @@ -1162,11 +1162,8 @@ static void kcryptd_crypt_write_convert(struct dm_crypt_io *io) crypt_dec_pending(io); } -static void kcryptd_crypt_read_done(struct dm_crypt_io *io, int error) +static void kcryptd_crypt_read_done(struct dm_crypt_io *io) { - if (unlikely(error < 0)) - io->error = -EIO; - crypt_dec_pending(io); } @@ -1181,9 +1178,11 @@ static void kcryptd_crypt_read_convert(struct dm_crypt_io *io) io->sector); r = crypt_convert(cc, &io->ctx); + if (r < 0) + io->error = -EIO; if (atomic_dec_and_test(&io->ctx.pending)) - kcryptd_crypt_read_done(io, r); + kcryptd_crypt_read_done(io); crypt_dec_pending(io); } @@ -1204,15 +1203,18 @@ static void kcryptd_async_done(struct crypto_async_request *async_req, if (!error && cc->iv_gen_ops && cc->iv_gen_ops->post) error = cc->iv_gen_ops->post(cc, iv_of_dmreq(cc, dmreq), dmreq); + if (error < 0) + io->error = -EIO; + mempool_free(req_of_dmreq(cc, dmreq), cc->req_pool); if (!atomic_dec_and_test(&ctx->pending)) return; if (bio_data_dir(io->base_bio) == READ) - kcryptd_crypt_read_done(io, error); + kcryptd_crypt_read_done(io); else - kcryptd_crypt_write_io_submit(io, error, 1); + kcryptd_crypt_write_io_submit(io, 1); } static void kcryptd_crypt(struct work_struct *work) @@ -1413,6 +1415,7 @@ static int crypt_ctr_cipher(struct dm_target *ti, char *tmp, *cipher, *chainmode, *ivmode, *ivopts, *keycount; char *cipher_api = NULL; int cpu, ret = -EINVAL; + char dummy; /* Convert to crypto api definition? */ if (strchr(cipher_in, '(')) { @@ -1434,7 +1437,7 @@ static int crypt_ctr_cipher(struct dm_target *ti, if (!keycount) cc->tfms_count = 1; - else if (sscanf(keycount, "%u", &cc->tfms_count) != 1 || + else if (sscanf(keycount, "%u%c", &cc->tfms_count, &dummy) != 1 || !is_power_of_2(cc->tfms_count)) { ti->error = "Bad cipher key count specification"; return -EINVAL; @@ -1579,6 +1582,7 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv) int ret; struct dm_arg_set as; const char *opt_string; + char dummy; static struct dm_arg _args[] = { {0, 1, "Invalid number of feature args"}, @@ -1636,7 +1640,7 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv) } ret = -EINVAL; - if (sscanf(argv[2], "%llu", &tmpll) != 1) { + if (sscanf(argv[2], "%llu%c", &tmpll, &dummy) != 1) { ti->error = "Invalid iv_offset sector"; goto bad; } @@ -1647,7 +1651,7 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv) goto bad; } - if (sscanf(argv[4], "%llu", &tmpll) != 1) { + if (sscanf(argv[4], "%llu%c", &tmpll, &dummy) != 1) { ti->error = "Invalid device sector"; goto bad; } diff --git a/drivers/md/dm-delay.c b/drivers/md/dm-delay.c index f18375dcedd9..2dc22dddb2ae 100644 --- a/drivers/md/dm-delay.c +++ b/drivers/md/dm-delay.c @@ -131,6 +131,7 @@ static int delay_ctr(struct dm_target *ti, unsigned int argc, char **argv) { struct delay_c *dc; unsigned long long tmpll; + char dummy; if (argc != 3 && argc != 6) { ti->error = "requires exactly 3 or 6 arguments"; @@ -145,13 +146,13 @@ static int delay_ctr(struct dm_target *ti, unsigned int argc, char **argv) dc->reads = dc->writes = 0; - if (sscanf(argv[1], "%llu", &tmpll) != 1) { + if (sscanf(argv[1], "%llu%c", &tmpll, &dummy) != 1) { ti->error = "Invalid device sector"; goto bad; } dc->start_read = tmpll; - if (sscanf(argv[2], "%u", &dc->read_delay) != 1) { + if (sscanf(argv[2], "%u%c", &dc->read_delay, &dummy) != 1) { ti->error = "Invalid delay"; goto bad; } @@ -166,13 +167,13 @@ static int delay_ctr(struct dm_target *ti, unsigned int argc, char **argv) if (argc == 3) goto out; - if (sscanf(argv[4], "%llu", &tmpll) != 1) { + if (sscanf(argv[4], "%llu%c", &tmpll, &dummy) != 1) { ti->error = "Invalid write device sector"; goto bad_dev_read; } dc->start_write = tmpll; - if (sscanf(argv[5], "%u", &dc->write_delay) != 1) { + if (sscanf(argv[5], "%u%c", &dc->write_delay, &dummy) != 1) { ti->error = "Invalid write delay"; goto bad_dev_read; } diff --git a/drivers/md/dm-exception-store.c b/drivers/md/dm-exception-store.c index 042e71996569..aa70f7d43a1a 100644 --- a/drivers/md/dm-exception-store.c +++ b/drivers/md/dm-exception-store.c @@ -283,7 +283,7 @@ int dm_exception_store_init(void) return 0; persistent_fail: - dm_persistent_snapshot_exit(); + dm_transient_snapshot_exit(); transient_fail: return r; } diff --git a/drivers/md/dm-flakey.c b/drivers/md/dm-flakey.c index b280c433e4a0..ac49c01f1a44 100644 --- a/drivers/md/dm-flakey.c +++ b/drivers/md/dm-flakey.c @@ -160,6 +160,7 @@ static int flakey_ctr(struct dm_target *ti, unsigned int argc, char **argv) unsigned long long tmpll; struct dm_arg_set as; const char *devname; + char dummy; as.argc = argc; as.argv = argv; @@ -178,7 +179,7 @@ static int flakey_ctr(struct dm_target *ti, unsigned int argc, char **argv) devname = dm_shift_arg(&as); - if (sscanf(dm_shift_arg(&as), "%llu", &tmpll) != 1) { + if (sscanf(dm_shift_arg(&as), "%llu%c", &tmpll, &dummy) != 1) { ti->error = "Invalid device sector"; goto bad; } diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c index 1ce84ed0b765..a1a3e6df17b8 100644 --- a/drivers/md/dm-ioctl.c +++ b/drivers/md/dm-ioctl.c @@ -880,6 +880,7 @@ static int dev_set_geometry(struct dm_ioctl *param, size_t param_size) struct hd_geometry geometry; unsigned long indata[4]; char *geostr = (char *) param + param->data_start; + char dummy; md = find_device(param); if (!md) @@ -891,8 +892,8 @@ static int dev_set_geometry(struct dm_ioctl *param, size_t param_size) goto out; } - x = sscanf(geostr, "%lu %lu %lu %lu", indata, - indata + 1, indata + 2, indata + 3); + x = sscanf(geostr, "%lu %lu %lu %lu%c", indata, + indata + 1, indata + 2, indata + 3, &dummy); if (x != 4) { DMWARN("Unable to interpret geometry settings."); diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c index 9728839f844a..3639eeab6042 100644 --- a/drivers/md/dm-linear.c +++ b/drivers/md/dm-linear.c @@ -29,6 +29,7 @@ static int linear_ctr(struct dm_target *ti, unsigned int argc, char **argv) { struct linear_c *lc; unsigned long long tmp; + char dummy; if (argc != 2) { ti->error = "Invalid argument count"; @@ -41,7 +42,7 @@ static int linear_ctr(struct dm_target *ti, unsigned int argc, char **argv) return -ENOMEM; } - if (sscanf(argv[1], "%llu", &tmp) != 1) { + if (sscanf(argv[1], "%llu%c", &tmp, &dummy) != 1) { ti->error = "dm-linear: Invalid device sector"; goto bad; } diff --git a/drivers/md/dm-log.c b/drivers/md/dm-log.c index 3b52bb72bd1f..65ebaebf502b 100644 --- a/drivers/md/dm-log.c +++ b/drivers/md/dm-log.c @@ -369,6 +369,7 @@ static int create_log_context(struct dm_dirty_log *log, struct dm_target *ti, unsigned int region_count; size_t bitset_size, buf_size; int r; + char dummy; if (argc < 1 || argc > 2) { DMWARN("wrong number of arguments to dirty region log"); @@ -387,7 +388,7 @@ static int create_log_context(struct dm_dirty_log *log, struct dm_target *ti, } } - if (sscanf(argv[0], "%u", ®ion_size) != 1 || + if (sscanf(argv[0], "%u%c", ®ion_size, &dummy) != 1 || !_check_region_size(ti, region_size)) { DMWARN("invalid region size %s", argv[0]); return -EINVAL; diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c index 801d92d237cf..922a3385eead 100644 --- a/drivers/md/dm-mpath.c +++ b/drivers/md/dm-mpath.c @@ -226,6 +226,27 @@ static void free_multipath(struct multipath *m) kfree(m); } +static int set_mapinfo(struct multipath *m, union map_info *info) +{ + struct dm_mpath_io *mpio; + + mpio = mempool_alloc(m->mpio_pool, GFP_ATOMIC); + if (!mpio) + return -ENOMEM; + + memset(mpio, 0, sizeof(*mpio)); + info->ptr = mpio; + + return 0; +} + +static void clear_mapinfo(struct multipath *m, union map_info *info) +{ + struct dm_mpath_io *mpio = info->ptr; + + info->ptr = NULL; + mempool_free(mpio, m->mpio_pool); +} /*----------------------------------------------- * Path selection @@ -341,13 +362,14 @@ static int __must_push_back(struct multipath *m) } static int map_io(struct multipath *m, struct request *clone, - struct dm_mpath_io *mpio, unsigned was_queued) + union map_info *map_context, unsigned was_queued) { int r = DM_MAPIO_REMAPPED; size_t nr_bytes = blk_rq_bytes(clone); unsigned long flags; struct pgpath *pgpath; struct block_device *bdev; + struct dm_mpath_io *mpio = map_context->ptr; spin_lock_irqsave(&m->lock, flags); @@ -423,7 +445,6 @@ static void dispatch_queued_ios(struct multipath *m) { int r; unsigned long flags; - struct dm_mpath_io *mpio; union map_info *info; struct request *clone, *n; LIST_HEAD(cl); @@ -436,16 +457,15 @@ static void dispatch_queued_ios(struct multipath *m) list_del_init(&clone->queuelist); info = dm_get_rq_mapinfo(clone); - mpio = info->ptr; - r = map_io(m, clone, mpio, 1); + r = map_io(m, clone, info, 1); if (r < 0) { - mempool_free(mpio, m->mpio_pool); + clear_mapinfo(m, info); dm_kill_unmapped_request(clone, r); } else if (r == DM_MAPIO_REMAPPED) dm_dispatch_request(clone); else if (r == DM_MAPIO_REQUEUE) { - mempool_free(mpio, m->mpio_pool); + clear_mapinfo(m, info); dm_requeue_unmapped_request(clone); } } @@ -908,20 +928,16 @@ static int multipath_map(struct dm_target *ti, struct request *clone, union map_info *map_context) { int r; - struct dm_mpath_io *mpio; struct multipath *m = (struct multipath *) ti->private; - mpio = mempool_alloc(m->mpio_pool, GFP_ATOMIC); - if (!mpio) + if (set_mapinfo(m, map_context) < 0) /* ENOMEM, requeue */ return DM_MAPIO_REQUEUE; - memset(mpio, 0, sizeof(*mpio)); - map_context->ptr = mpio; clone->cmd_flags |= REQ_FAILFAST_TRANSPORT; - r = map_io(m, clone, mpio, 0); + r = map_io(m, clone, map_context, 0); if (r < 0 || r == DM_MAPIO_REQUEUE) - mempool_free(mpio, m->mpio_pool); + clear_mapinfo(m, map_context); return r; } @@ -1054,8 +1070,9 @@ static int switch_pg_num(struct multipath *m, const char *pgstr) struct priority_group *pg; unsigned pgnum; unsigned long flags; + char dummy; - if (!pgstr || (sscanf(pgstr, "%u", &pgnum) != 1) || !pgnum || + if (!pgstr || (sscanf(pgstr, "%u%c", &pgnum, &dummy) != 1) || !pgnum || (pgnum > m->nr_priority_groups)) { DMWARN("invalid PG number supplied to switch_pg_num"); return -EINVAL; @@ -1085,8 +1102,9 @@ static int bypass_pg_num(struct multipath *m, const char *pgstr, int bypassed) { struct priority_group *pg; unsigned pgnum; + char dummy; - if (!pgstr || (sscanf(pgstr, "%u", &pgnum) != 1) || !pgnum || + if (!pgstr || (sscanf(pgstr, "%u%c", &pgnum, &dummy) != 1) || !pgnum || (pgnum > m->nr_priority_groups)) { DMWARN("invalid PG number supplied to bypass_pg"); return -EINVAL; @@ -1261,13 +1279,15 @@ static int multipath_end_io(struct dm_target *ti, struct request *clone, struct path_selector *ps; int r; + BUG_ON(!mpio); + r = do_end_io(m, clone, error, mpio); if (pgpath) { ps = &pgpath->pg->ps; if (ps->type->end_io) ps->type->end_io(ps, &pgpath->path, mpio->nr_bytes); } - mempool_free(mpio, m->mpio_pool); + clear_mapinfo(m, map_context); return r; } diff --git a/drivers/md/dm-queue-length.c b/drivers/md/dm-queue-length.c index 03a837aa5ce6..3941fae0de9f 100644 --- a/drivers/md/dm-queue-length.c +++ b/drivers/md/dm-queue-length.c @@ -112,6 +112,7 @@ static int ql_add_path(struct path_selector *ps, struct dm_path *path, struct selector *s = ps->context; struct path_info *pi; unsigned repeat_count = QL_MIN_IO; + char dummy; /* * Arguments: [<repeat_count>] @@ -123,7 +124,7 @@ static int ql_add_path(struct path_selector *ps, struct dm_path *path, return -EINVAL; } - if ((argc == 1) && (sscanf(argv[0], "%u", &repeat_count) != 1)) { + if ((argc == 1) && (sscanf(argv[0], "%u%c", &repeat_count, &dummy) != 1)) { *error = "queue-length ps: invalid repeat count"; return -EINVAL; } diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c index c5a875d7b882..b0ba52459ed7 100644 --- a/drivers/md/dm-raid.c +++ b/drivers/md/dm-raid.c @@ -604,7 +604,9 @@ static int read_disk_sb(struct md_rdev *rdev, int size) return 0; if (!sync_page_io(rdev, 0, size, rdev->sb_page, READ, 1)) { - DMERR("Failed to read device superblock"); + DMERR("Failed to read superblock of device at position %d", + rdev->raid_disk); + set_bit(Faulty, &rdev->flags); return -EINVAL; } @@ -855,9 +857,25 @@ static int super_validate(struct mddev *mddev, struct md_rdev *rdev) static int analyse_superblocks(struct dm_target *ti, struct raid_set *rs) { int ret; + unsigned redundancy = 0; + struct raid_dev *dev; struct md_rdev *rdev, *freshest; struct mddev *mddev = &rs->md; + switch (rs->raid_type->level) { + case 1: + redundancy = rs->md.raid_disks - 1; + break; + case 4: + case 5: + case 6: + redundancy = rs->raid_type->parity_devs; + break; + default: + ti->error = "Unknown RAID type"; + return -EINVAL; + } + freshest = NULL; rdev_for_each(rdev, mddev) { if (!rdev->meta_bdev) @@ -872,6 +890,37 @@ static int analyse_superblocks(struct dm_target *ti, struct raid_set *rs) case 0: break; default: + dev = container_of(rdev, struct raid_dev, rdev); + if (redundancy--) { + if (dev->meta_dev) + dm_put_device(ti, dev->meta_dev); + + dev->meta_dev = NULL; + rdev->meta_bdev = NULL; + + if (rdev->sb_page) + put_page(rdev->sb_page); + + rdev->sb_page = NULL; + + rdev->sb_loaded = 0; + + /* + * We might be able to salvage the data device + * even though the meta device has failed. For + * now, we behave as though '- -' had been + * set for this device in the table. + */ + if (dev->data_dev) + dm_put_device(ti, dev->data_dev); + + dev->data_dev = NULL; + rdev->bdev = NULL; + + list_del(&rdev->same_set); + + continue; + } ti->error = "Failed to load superblock"; return ret; } @@ -1214,7 +1263,7 @@ static void raid_resume(struct dm_target *ti) static struct target_type raid_target = { .name = "raid", - .version = {1, 1, 0}, + .version = {1, 2, 0}, .module = THIS_MODULE, .ctr = raid_ctr, .dtr = raid_dtr, diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c index 9bfd057be686..d039de8322f0 100644 --- a/drivers/md/dm-raid1.c +++ b/drivers/md/dm-raid1.c @@ -924,8 +924,9 @@ static int get_mirror(struct mirror_set *ms, struct dm_target *ti, unsigned int mirror, char **argv) |