mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
synced 2025-01-04 04:02:26 +00:00
- Update DM core to directly call the map function for both the linear
and stripe targets; which are provided by DM core. - Various updates to use new safer string functions. - Update DM core to respect REQ_NOWAIT flag in normal bios so that memory allocations are always attempted with GFP_NOWAIT. - Add Mikulas Patocka to MAINTAINERS as a DM maintainer! - Improve DM delay target's handling of short delays (< 50ms) by using a kthread to check expiration of IOs rather than timers and a wq. - Update the DM error target so that it works with zoned storage. This helps xfstests to provide proper IO error handling coverage when testing a filesystem with native zoned storage support. - Update both DM crypt and integrity targets to improve performance by using crypto_shash_digest() rather than init+update+final sequence. - Fix DM crypt target by backfilling missing memory allocation accounting for compound pages. -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEJfWUX4UqZ4x1O2wixSPxCi2dA1oFAmVCeG8ACgkQxSPxCi2d A1oXAAgAnT0mb1psEwDhKiJG26bUeJDJHIaNTPPw4UpCvKEWU7lTxzJUmthnwLZI D+JnkrenAfGppdsFkHh1ogTBz8r60aeBTY31SUoCUVS/clwHxRstLCkSE2655an3 WNgrGItta5BRtcgTMxU7bmqVOD4Xyw704L7BK5CM4zKBQuXJtkegylALhdXvYSjs mvHWoPczFW6Rv79CkF0uTkon7Ji041BvKVjbp+fYQf9Pul5d6S1v4Jrvlo2EqblU 6OM75OosNgziQhdw7faVOgFCVkQfLkEeYsJ47dBOjpC3+sbyKENbC4r+ZmkCZGyI uJERswpmAkW7pp+Ab6sqG582DXvPvA== =PPwQ -----END PGP SIGNATURE----- Merge tag 'for-6.7/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm Pull device mapper updates from Mike Snitzer: - Update DM core to directly call the map function for both the linear and stripe targets; which are provided by DM core - Various updates to use new safer string functions - Update DM core to respect REQ_NOWAIT flag in normal bios so that memory allocations are always attempted with GFP_NOWAIT - Add Mikulas Patocka to MAINTAINERS as a DM maintainer! - Improve DM delay target's handling of short delays (< 50ms) by using a kthread to check expiration of IOs rather than timers and a wq - Update the DM error target so that it works with zoned storage. This helps xfstests to provide proper IO error handling coverage when testing a filesystem with native zoned storage support - Update both DM crypt and integrity targets to improve performance by using crypto_shash_digest() rather than init+update+final sequence - Fix DM crypt target by backfilling missing memory allocation accounting for compound pages * tag 'for-6.7/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: dm crypt: account large pages in cc->n_allocated_pages dm integrity: use crypto_shash_digest() in sb_mac() dm crypt: use crypto_shash_digest() in crypt_iv_tcw_whitening() dm error: Add support for zoned block devices dm delay: for short delays, use kthread instead of timers and wq MAINTAINERS: add Mikulas Patocka as a DM maintainer dm: respect REQ_NOWAIT flag in normal bios issued to DM dm: enhance alloc_multiple_bios() to be more versatile dm: make __send_duplicate_bios return unsigned int dm log userspace: replace deprecated strncpy with strscpy dm ioctl: replace deprecated strncpy with strscpy_pad dm crypt: replace open-coded kmemdup_nul dm cache metadata: replace deprecated strncpy with strscpy dm: shortcut the calls to linear_map and stripe_map
This commit is contained in:
Linus Torvalds
commit
0364249d20
@ -6028,6 +6028,7 @@ F: include/linux/devm-helpers.h
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DEVICE-MAPPER (LVM)
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M: Alasdair Kergon <agk@redhat.com>
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M: Mike Snitzer <snitzer@kernel.org>
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M: Mikulas Patocka <mpatocka@redhat.com>
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M: dm-devel@lists.linux.dev
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L: dm-devel@lists.linux.dev
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S: Maintained
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@ -597,7 +597,7 @@ static void read_superblock_fields(struct dm_cache_metadata *cmd,
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cmd->discard_nr_blocks = to_dblock(le64_to_cpu(disk_super->discard_nr_blocks));
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cmd->data_block_size = le32_to_cpu(disk_super->data_block_size);
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cmd->cache_blocks = to_cblock(le32_to_cpu(disk_super->cache_blocks));
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strncpy(cmd->policy_name, disk_super->policy_name, sizeof(cmd->policy_name));
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strscpy(cmd->policy_name, disk_super->policy_name, sizeof(cmd->policy_name));
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cmd->policy_version[0] = le32_to_cpu(disk_super->policy_version[0]);
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cmd->policy_version[1] = le32_to_cpu(disk_super->policy_version[1]);
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cmd->policy_version[2] = le32_to_cpu(disk_super->policy_version[2]);
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@ -707,7 +707,7 @@ static int __commit_transaction(struct dm_cache_metadata *cmd,
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disk_super->discard_block_size = cpu_to_le64(cmd->discard_block_size);
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disk_super->discard_nr_blocks = cpu_to_le64(from_dblock(cmd->discard_nr_blocks));
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disk_super->cache_blocks = cpu_to_le32(from_cblock(cmd->cache_blocks));
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strncpy(disk_super->policy_name, cmd->policy_name, sizeof(disk_super->policy_name));
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strscpy(disk_super->policy_name, cmd->policy_name, sizeof(disk_super->policy_name));
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disk_super->policy_version[0] = cpu_to_le32(cmd->policy_version[0]);
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disk_super->policy_version[1] = cpu_to_le32(cmd->policy_version[1]);
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disk_super->policy_version[2] = cpu_to_le32(cmd->policy_version[2]);
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@ -1726,7 +1726,7 @@ static int write_hints(struct dm_cache_metadata *cmd, struct dm_cache_policy *po
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(strlen(policy_name) > sizeof(cmd->policy_name) - 1))
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return -EINVAL;
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strncpy(cmd->policy_name, policy_name, sizeof(cmd->policy_name));
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strscpy(cmd->policy_name, policy_name, sizeof(cmd->policy_name));
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memcpy(cmd->policy_version, policy_version, sizeof(cmd->policy_version));
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hint_size = dm_cache_policy_get_hint_size(policy);
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@ -652,13 +652,7 @@ static int crypt_iv_tcw_whitening(struct crypt_config *cc,
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/* calculate crc32 for every 32bit part and xor it */
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desc->tfm = tcw->crc32_tfm;
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for (i = 0; i < 4; i++) {
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r = crypto_shash_init(desc);
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if (r)
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goto out;
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r = crypto_shash_update(desc, &buf[i * 4], 4);
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if (r)
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goto out;
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r = crypto_shash_final(desc, &buf[i * 4]);
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r = crypto_shash_digest(desc, &buf[i * 4], 4, &buf[i * 4]);
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if (r)
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goto out;
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}
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@ -1699,11 +1693,17 @@ static struct bio *crypt_alloc_buffer(struct dm_crypt_io *io, unsigned int size)
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order = min(order, remaining_order);
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while (order > 0) {
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if (unlikely(percpu_counter_read_positive(&cc->n_allocated_pages) +
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(1 << order) > dm_crypt_pages_per_client))
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goto decrease_order;
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pages = alloc_pages(gfp_mask
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| __GFP_NOMEMALLOC | __GFP_NORETRY | __GFP_NOWARN | __GFP_COMP,
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order);
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if (likely(pages != NULL))
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if (likely(pages != NULL)) {
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percpu_counter_add(&cc->n_allocated_pages, 1 << order);
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goto have_pages;
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}
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decrease_order:
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order--;
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}
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@ -1741,10 +1741,13 @@ static void crypt_free_buffer_pages(struct crypt_config *cc, struct bio *clone)
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if (clone->bi_vcnt > 0) { /* bio_for_each_folio_all crashes with an empty bio */
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bio_for_each_folio_all(fi, clone) {
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if (folio_test_large(fi.folio))
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if (folio_test_large(fi.folio)) {
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percpu_counter_sub(&cc->n_allocated_pages,
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1 << folio_order(fi.folio));
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folio_put(fi.folio);
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else
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} else {
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mempool_free(&fi.folio->page, &cc->page_pool);
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}
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}
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}
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}
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@ -2859,10 +2862,9 @@ static int crypt_ctr_auth_cipher(struct crypt_config *cc, char *cipher_api)
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if (!start || !end || ++start > end)
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return -EINVAL;
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mac_alg = kzalloc(end - start + 1, GFP_KERNEL);
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mac_alg = kmemdup_nul(start, end - start, GFP_KERNEL);
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if (!mac_alg)
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return -ENOMEM;
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strncpy(mac_alg, start, end - start);
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mac = crypto_alloc_ahash(mac_alg, 0, CRYPTO_ALG_ALLOCATES_MEMORY);
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kfree(mac_alg);
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@ -13,6 +13,7 @@
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#include <linux/blkdev.h>
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#include <linux/bio.h>
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#include <linux/slab.h>
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#include <linux/kthread.h>
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#include <linux/device-mapper.h>
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@ -31,6 +32,7 @@ struct delay_c {
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struct workqueue_struct *kdelayd_wq;
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struct work_struct flush_expired_bios;
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struct list_head delayed_bios;
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struct task_struct *worker;
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atomic_t may_delay;
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struct delay_class read;
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@ -66,6 +68,44 @@ static void queue_timeout(struct delay_c *dc, unsigned long expires)
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mutex_unlock(&dc->timer_lock);
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}
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static inline bool delay_is_fast(struct delay_c *dc)
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{
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return !!dc->worker;
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}
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static void flush_delayed_bios_fast(struct delay_c *dc, bool flush_all)
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{
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struct dm_delay_info *delayed, *next;
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mutex_lock(&delayed_bios_lock);
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list_for_each_entry_safe(delayed, next, &dc->delayed_bios, list) {
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if (flush_all || time_after_eq(jiffies, delayed->expires)) {
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struct bio *bio = dm_bio_from_per_bio_data(delayed,
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sizeof(struct dm_delay_info));
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list_del(&delayed->list);
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dm_submit_bio_remap(bio, NULL);
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delayed->class->ops--;
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}
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}
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mutex_unlock(&delayed_bios_lock);
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}
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static int flush_worker_fn(void *data)
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{
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struct delay_c *dc = data;
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while (1) {
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flush_delayed_bios_fast(dc, false);
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if (unlikely(list_empty(&dc->delayed_bios))) {
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set_current_state(TASK_INTERRUPTIBLE);
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schedule();
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} else
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cond_resched();
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}
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return 0;
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}
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static void flush_bios(struct bio *bio)
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{
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struct bio *n;
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@ -78,7 +118,7 @@ static void flush_bios(struct bio *bio)
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}
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}
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static struct bio *flush_delayed_bios(struct delay_c *dc, int flush_all)
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static struct bio *flush_delayed_bios(struct delay_c *dc, bool flush_all)
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{
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struct dm_delay_info *delayed, *next;
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unsigned long next_expires = 0;
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@ -115,7 +155,10 @@ static void flush_expired_bios(struct work_struct *work)
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struct delay_c *dc;
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dc = container_of(work, struct delay_c, flush_expired_bios);
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flush_bios(flush_delayed_bios(dc, 0));
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if (delay_is_fast(dc))
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flush_delayed_bios_fast(dc, false);
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else
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flush_bios(flush_delayed_bios(dc, false));
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}
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static void delay_dtr(struct dm_target *ti)
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@ -131,8 +174,11 @@ static void delay_dtr(struct dm_target *ti)
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dm_put_device(ti, dc->write.dev);
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if (dc->flush.dev)
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dm_put_device(ti, dc->flush.dev);
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if (dc->worker)
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kthread_stop(dc->worker);
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mutex_destroy(&dc->timer_lock);
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if (!delay_is_fast(dc))
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mutex_destroy(&dc->timer_lock);
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kfree(dc);
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}
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@ -175,6 +221,7 @@ static int delay_ctr(struct dm_target *ti, unsigned int argc, char **argv)
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{
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struct delay_c *dc;
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int ret;
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unsigned int max_delay;
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if (argc != 3 && argc != 6 && argc != 9) {
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ti->error = "Requires exactly 3, 6 or 9 arguments";
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@ -188,16 +235,14 @@ static int delay_ctr(struct dm_target *ti, unsigned int argc, char **argv)
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}
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ti->private = dc;
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timer_setup(&dc->delay_timer, handle_delayed_timer, 0);
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INIT_WORK(&dc->flush_expired_bios, flush_expired_bios);
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INIT_LIST_HEAD(&dc->delayed_bios);
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mutex_init(&dc->timer_lock);
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atomic_set(&dc->may_delay, 1);
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dc->argc = argc;
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ret = delay_class_ctr(ti, &dc->read, argv);
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if (ret)
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goto bad;
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max_delay = dc->read.delay;
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if (argc == 3) {
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ret = delay_class_ctr(ti, &dc->write, argv);
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@ -206,6 +251,8 @@ static int delay_ctr(struct dm_target *ti, unsigned int argc, char **argv)
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ret = delay_class_ctr(ti, &dc->flush, argv);
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if (ret)
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goto bad;
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max_delay = max(max_delay, dc->write.delay);
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max_delay = max(max_delay, dc->flush.delay);
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goto out;
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}
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@ -216,19 +263,37 @@ static int delay_ctr(struct dm_target *ti, unsigned int argc, char **argv)
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ret = delay_class_ctr(ti, &dc->flush, argv + 3);
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if (ret)
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goto bad;
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max_delay = max(max_delay, dc->flush.delay);
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goto out;
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}
|
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ret = delay_class_ctr(ti, &dc->flush, argv + 6);
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if (ret)
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goto bad;
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max_delay = max(max_delay, dc->flush.delay);
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out:
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dc->kdelayd_wq = alloc_workqueue("kdelayd", WQ_MEM_RECLAIM, 0);
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if (!dc->kdelayd_wq) {
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ret = -EINVAL;
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DMERR("Couldn't start kdelayd");
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goto bad;
|
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if (max_delay < 50) {
|
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/*
|
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* In case of small requested delays, use kthread instead of
|
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* timers and workqueue to achieve better latency.
|
||||
*/
|
||||
dc->worker = kthread_create(&flush_worker_fn, dc,
|
||||
"dm-delay-flush-worker");
|
||||
if (IS_ERR(dc->worker)) {
|
||||
ret = PTR_ERR(dc->worker);
|
||||
goto bad;
|
||||
}
|
||||
} else {
|
||||
timer_setup(&dc->delay_timer, handle_delayed_timer, 0);
|
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INIT_WORK(&dc->flush_expired_bios, flush_expired_bios);
|
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mutex_init(&dc->timer_lock);
|
||||
dc->kdelayd_wq = alloc_workqueue("kdelayd", WQ_MEM_RECLAIM, 0);
|
||||
if (!dc->kdelayd_wq) {
|
||||
ret = -EINVAL;
|
||||
DMERR("Couldn't start kdelayd");
|
||||
goto bad;
|
||||
}
|
||||
}
|
||||
|
||||
ti->num_flush_bios = 1;
|
||||
@ -260,7 +325,10 @@ static int delay_bio(struct delay_c *dc, struct delay_class *c, struct bio *bio)
|
||||
list_add_tail(&delayed->list, &dc->delayed_bios);
|
||||
mutex_unlock(&delayed_bios_lock);
|
||||
|
||||
queue_timeout(dc, expires);
|
||||
if (delay_is_fast(dc))
|
||||
wake_up_process(dc->worker);
|
||||
else
|
||||
queue_timeout(dc, expires);
|
||||
|
||||
return DM_MAPIO_SUBMITTED;
|
||||
}
|
||||
@ -270,8 +338,13 @@ static void delay_presuspend(struct dm_target *ti)
|
||||
struct delay_c *dc = ti->private;
|
||||
|
||||
atomic_set(&dc->may_delay, 0);
|
||||
del_timer_sync(&dc->delay_timer);
|
||||
flush_bios(flush_delayed_bios(dc, 1));
|
||||
|
||||
if (delay_is_fast(dc))
|
||||
flush_delayed_bios_fast(dc, true);
|
||||
else {
|
||||
del_timer_sync(&dc->delay_timer);
|
||||
flush_bios(flush_delayed_bios(dc, true));
|
||||
}
|
||||
}
|
||||
|
||||
static void delay_resume(struct dm_target *ti)
|
||||
@ -356,7 +429,7 @@ static int delay_iterate_devices(struct dm_target *ti,
|
||||
|
||||
static struct target_type delay_target = {
|
||||
.name = "delay",
|
||||
.version = {1, 3, 0},
|
||||
.version = {1, 4, 0},
|
||||
.features = DM_TARGET_PASSES_INTEGRITY,
|
||||
.module = THIS_MODULE,
|
||||
.ctr = delay_ctr,
|
||||
|
||||
@ -493,42 +493,32 @@ static int sb_mac(struct dm_integrity_c *ic, bool wr)
|
||||
{
|
||||
SHASH_DESC_ON_STACK(desc, ic->journal_mac);
|
||||
int r;
|
||||
unsigned int size = crypto_shash_digestsize(ic->journal_mac);
|
||||
unsigned int mac_size = crypto_shash_digestsize(ic->journal_mac);
|
||||
__u8 *sb = (__u8 *)ic->sb;
|
||||
__u8 *mac = sb + (1 << SECTOR_SHIFT) - mac_size;
|
||||
|
||||
if (sizeof(struct superblock) + size > 1 << SECTOR_SHIFT) {
|
||||
if (sizeof(struct superblock) + mac_size > 1 << SECTOR_SHIFT) {
|
||||
dm_integrity_io_error(ic, "digest is too long", -EINVAL);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
desc->tfm = ic->journal_mac;
|
||||
|
||||
r = crypto_shash_init(desc);
|
||||
if (unlikely(r < 0)) {
|
||||
dm_integrity_io_error(ic, "crypto_shash_init", r);
|
||||
return r;
|
||||
}
|
||||
|
||||
r = crypto_shash_update(desc, (__u8 *)ic->sb, (1 << SECTOR_SHIFT) - size);
|
||||
if (unlikely(r < 0)) {
|
||||
dm_integrity_io_error(ic, "crypto_shash_update", r);
|
||||
return r;
|
||||
}
|
||||
|
||||
if (likely(wr)) {
|
||||
r = crypto_shash_final(desc, (__u8 *)ic->sb + (1 << SECTOR_SHIFT) - size);
|
||||
r = crypto_shash_digest(desc, sb, mac - sb, mac);
|
||||
if (unlikely(r < 0)) {
|
||||
dm_integrity_io_error(ic, "crypto_shash_final", r);
|
||||
dm_integrity_io_error(ic, "crypto_shash_digest", r);
|
||||
return r;
|
||||
}
|
||||
} else {
|
||||
__u8 result[HASH_MAX_DIGESTSIZE];
|
||||
__u8 actual_mac[HASH_MAX_DIGESTSIZE];
|
||||
|
||||
r = crypto_shash_final(desc, result);
|
||||
r = crypto_shash_digest(desc, sb, mac - sb, actual_mac);
|
||||
if (unlikely(r < 0)) {
|
||||
dm_integrity_io_error(ic, "crypto_shash_final", r);
|
||||
dm_integrity_io_error(ic, "crypto_shash_digest", r);
|
||||
return r;
|
||||
}
|
||||
if (memcmp((__u8 *)ic->sb + (1 << SECTOR_SHIFT) - size, result, size)) {
|
||||
if (memcmp(mac, actual_mac, mac_size)) {
|
||||
dm_integrity_io_error(ic, "superblock mac", -EILSEQ);
|
||||
dm_audit_log_target(DM_MSG_PREFIX, "mac-superblock", ic->ti, 0);
|
||||
return -EILSEQ;
|
||||
|
||||
@ -1295,8 +1295,8 @@ static void retrieve_status(struct dm_table *table,
|
||||
spec->status = 0;
|
||||
spec->sector_start = ti->begin;
|
||||
spec->length = ti->len;
|
||||
strncpy(spec->target_type, ti->type->name,
|
||||
sizeof(spec->target_type) - 1);
|
||||
strscpy_pad(spec->target_type, ti->type->name,
|
||||
sizeof(spec->target_type));
|
||||
|
||||
outptr += sizeof(struct dm_target_spec);
|
||||
remaining = len - (outptr - outbuf);
|
||||
|
||||
@ -85,7 +85,7 @@ static sector_t linear_map_sector(struct dm_target *ti, sector_t bi_sector)
|
||||
return lc->start + dm_target_offset(ti, bi_sector);
|
||||
}
|
||||
|
||||
static int linear_map(struct dm_target *ti, struct bio *bio)
|
||||
int linear_map(struct dm_target *ti, struct bio *bio)
|
||||
{
|
||||
struct linear_c *lc = ti->private;
|
||||
|
||||
|
||||
@ -224,7 +224,7 @@ static int userspace_ctr(struct dm_dirty_log *log, struct dm_target *ti,
|
||||
|
||||
lc->usr_argc = argc;
|
||||
|
||||
strncpy(lc->uuid, argv[0], DM_UUID_LEN);
|
||||
strscpy(lc->uuid, argv[0], sizeof(lc->uuid));
|
||||
argc--;
|
||||
argv++;
|
||||
spin_lock_init(&lc->flush_lock);
|
||||
|
||||
@ -268,7 +268,7 @@ static int stripe_map_range(struct stripe_c *sc, struct bio *bio,
|
||||
return DM_MAPIO_SUBMITTED;
|
||||
}
|
||||
|
||||
static int stripe_map(struct dm_target *ti, struct bio *bio)
|
||||
int stripe_map(struct dm_target *ti, struct bio *bio)
|
||||
{
|
||||
struct stripe_c *sc = ti->private;
|
||||
uint32_t stripe;
|
||||
|
||||
@ -844,7 +844,8 @@ static bool dm_table_supports_dax(struct dm_table *t,
|
||||
if (!ti->type->direct_access)
|
||||
return false;
|
||||
|
||||
if (!ti->type->iterate_devices ||
|
||||
if (dm_target_is_wildcard(ti->type) ||
|
||||
!ti->type->iterate_devices ||
|
||||
ti->type->iterate_devices(ti, iterate_fn, NULL))
|
||||
return false;
|
||||
}
|
||||
@ -1587,6 +1588,14 @@ static int device_not_zoned_model(struct dm_target *ti, struct dm_dev *dev,
|
||||
return blk_queue_zoned_model(q) != *zoned_model;
|
||||
}
|
||||
|
||||
static int device_is_zoned_model(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 blk_queue_zoned_model(q) != BLK_ZONED_NONE;
|
||||
}
|
||||
|
||||
/*
|
||||
* Check the device zoned model based on the target feature flag. If the target
|
||||
* has the DM_TARGET_ZONED_HM feature flag set, host-managed zoned devices are
|
||||
@ -1600,6 +1609,18 @@ static bool dm_table_supports_zoned_model(struct dm_table *t,
|
||||
for (unsigned int i = 0; i < t->num_targets; i++) {
|
||||
struct dm_target *ti = dm_table_get_target(t, i);
|
||||
|
||||
/*
|
||||
* For the wildcard target (dm-error), if we do not have a
|
||||
* backing device, we must always return false. If we have a
|
||||
* backing device, the result must depend on checking zoned
|
||||
* model, like for any other target. So for this, check directly
|
||||
* if the target backing device is zoned as we get "false" when
|
||||
* dm-error was set without a backing device.
|
||||
*/
|
||||
if (dm_target_is_wildcard(ti->type) &&
|
||||
!ti->type->iterate_devices(ti, device_is_zoned_model, NULL))
|
||||
return false;
|
||||
|
||||
if (dm_target_supports_zoned_hm(ti->type)) {
|
||||
if (!ti->type->iterate_devices ||
|
||||
ti->type->iterate_devices(ti, device_not_zoned_model,
|
||||
|
||||
@ -116,8 +116,62 @@ EXPORT_SYMBOL(dm_unregister_target);
|
||||
* io-err: always fails an io, useful for bringing
|
||||
* up LVs that have holes in them.
|
||||
*/
|
||||
struct io_err_c {
|
||||
struct dm_dev *dev;
|
||||
sector_t start;
|
||||
};
|
||||
|
||||
static int io_err_get_args(struct dm_target *tt, unsigned int argc, char **args)
|
||||
{
|
||||
unsigned long long start;
|
||||
struct io_err_c *ioec;
|
||||
char dummy;
|
||||
int ret;
|
||||
|
||||
ioec = kmalloc(sizeof(*ioec), GFP_KERNEL);
|
||||
if (!ioec) {
|
||||
tt->error = "Cannot allocate io_err context";
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
ret = -EINVAL;
|
||||
if (sscanf(args[1], "%llu%c", &start, &dummy) != 1 ||
|
||||
start != (sector_t)start) {
|
||||
tt->error = "Invalid device sector";
|
||||
goto bad;
|
||||
}
|
||||
ioec->start = start;
|
||||
|
||||
ret = dm_get_device(tt, args[0], dm_table_get_mode(tt->table), &ioec->dev);
|
||||
if (ret) {
|
||||
tt->error = "Device lookup failed";
|
||||
goto bad;
|
||||
}
|
||||
|
||||
tt->private = ioec;
|
||||
|
||||
return 0;
|
||||
|
||||
bad:
|
||||
kfree(ioec);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int io_err_ctr(struct dm_target *tt, unsigned int argc, char **args)
|
||||
{
|
||||
/*
|
||||
* If we have arguments, assume it is the path to the backing
|
||||
* block device and its mapping start sector (same as dm-linear).
|
||||
* In this case, get the device so that we can get its limits.
|
||||
*/
|
||||
if (argc == 2) {
|
||||
int ret = io_err_get_args(tt, argc, args);
|
||||
|
||||
if (ret)
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* Return error for discards instead of -EOPNOTSUPP
|
||||
*/
|
||||
@ -129,7 +183,12 @@ static int io_err_ctr(struct dm_target *tt, unsigned int argc, char **args)
|
||||
|
||||
static void io_err_dtr(struct dm_target *tt)
|
||||
{
|
||||
/* empty */
|
||||
struct io_err_c *ioec = tt->private;
|
||||
|
||||
if (ioec) {
|
||||
dm_put_device(tt, ioec->dev);
|
||||
kfree(ioec);
|
||||
}
|
||||
}
|
||||
|
||||
static int io_err_map(struct dm_target *tt, struct bio *bio)
|
||||
@ -149,6 +208,45 @@ static void io_err_release_clone_rq(struct request *clone,
|
||||
{
|
||||
}
|
||||
|
||||
#ifdef CONFIG_BLK_DEV_ZONED
|
||||
static sector_t io_err_map_sector(struct dm_target *ti, sector_t bi_sector)
|
||||
{
|
||||
struct io_err_c *ioec = ti->private;
|
||||
|
||||
return ioec->start + dm_target_offset(ti, bi_sector);
|
||||
}
|
||||
|
||||
static int io_err_report_zones(struct dm_target *ti,
|
||||
struct dm_report_zones_args *args, unsigned int nr_zones)
|
||||
{
|
||||
struct io_err_c *ioec = ti->private;
|
||||
|
||||
/*
|
||||
* This should never be called when we do not have a backing device
|
||||
* as that mean the target is not a zoned one.
|
||||
*/
|
||||
if (WARN_ON_ONCE(!ioec))
|
||||
return -EIO;
|
||||
|
||||
return dm_report_zones(ioec->dev->bdev, ioec->start,
|
||||
io_err_map_sector(ti, args->next_sector),
|
||||
args, nr_zones);
|
||||
}
|
||||
#else
|
||||
#define io_err_report_zones NULL
|
||||
#endif
|
||||
|
||||
static int io_err_iterate_devices(struct dm_target *ti,
|
||||
iterate_devices_callout_fn fn, void *data)
|
||||
{
|
||||
struct io_err_c *ioec = ti->private;
|
||||
|
||||
if (!ioec)
|
||||
return 0;
|
||||
|
||||
return fn(ti, ioec->dev, ioec->start, ti->len, data);
|
||||
}
|
||||
|
||||
static void io_err_io_hints(struct dm_target *ti, struct queue_limits *limits)
|
||||
{
|
||||
limits->max_discard_sectors = UINT_MAX;
|
||||
@ -165,15 +263,17 @@ static long io_err_dax_direct_access(struct dm_target *ti, pgoff_t pgoff,
|
||||
|
||||
static struct target_type error_target = {
|
||||
.name = "error",
|
||||
.version = {1, 6, 0},
|
||||
.features = DM_TARGET_WILDCARD,
|
||||
.version = {1, 7, 0},
|
||||
.features = DM_TARGET_WILDCARD | DM_TARGET_ZONED_HM,
|
||||
.ctr = io_err_ctr,
|
||||
.dtr = io_err_dtr,
|
||||
.map = io_err_map,
|
||||
.clone_and_map_rq = io_err_clone_and_map_rq,
|
||||
.release_clone_rq = io_err_release_clone_rq,
|
||||
.iterate_devices = io_err_iterate_devices,
|
||||
.io_hints = io_err_io_hints,
|
||||
.direct_access = io_err_dax_direct_access,
|
||||
.report_zones = io_err_report_zones,
|
||||
};
|
||||
|
||||
int __init dm_target_init(void)
|
||||
|
||||
121
drivers/md/dm.c
121
drivers/md/dm.c
@ -570,13 +570,15 @@ static void dm_end_io_acct(struct dm_io *io)
|
||||
dm_io_acct(io, true);
|
||||
}
|
||||
|
||||
static struct dm_io *alloc_io(struct mapped_device *md, struct bio *bio)
|
||||
static struct dm_io *alloc_io(struct mapped_device *md, struct bio *bio, gfp_t gfp_mask)
|
||||
{
|
||||
struct dm_io *io;
|
||||
struct dm_target_io *tio;
|
||||
struct bio *clone;
|
||||
|
||||
clone = bio_alloc_clone(NULL, bio, GFP_NOIO, &md->mempools->io_bs);
|
||||
clone = bio_alloc_clone(NULL, bio, gfp_mask, &md->mempools->io_bs);
|
||||
if (unlikely(!clone))
|
||||
return NULL;
|
||||
tio = clone_to_tio(clone);
|
||||
tio->flags = 0;
|
||||
dm_tio_set_flag(tio, DM_TIO_INSIDE_DM_IO);
|
||||
@ -1425,10 +1427,17 @@ static void __map_bio(struct bio *clone)
|
||||
*/
|
||||
if (unlikely(dm_emulate_zone_append(md)))
|
||||
r = dm_zone_map_bio(tio);
|
||||
else
|
||||
goto do_map;
|
||||
} else {
|
||||
do_map:
|
||||
if (likely(ti->type->map == linear_map))
|
||||
r = linear_map(ti, clone);
|
||||
else if (ti->type->map == stripe_map)
|
||||
r = stripe_map(ti, clone);
|
||||
else
|
||||
r = ti->type->map(ti, clone);
|
||||
} else
|
||||
r = ti->type->map(ti, clone);
|
||||
}
|
||||
|
||||
switch (r) {
|
||||
case DM_MAPIO_SUBMITTED:
|
||||
@ -1473,15 +1482,15 @@ static void setup_split_accounting(struct clone_info *ci, unsigned int len)
|
||||
|
||||
static void alloc_multiple_bios(struct bio_list *blist, struct clone_info *ci,
|
||||
struct dm_target *ti, unsigned int num_bios,
|
||||
unsigned *len)
|
||||
unsigned *len, gfp_t gfp_flag)
|
||||
{
|
||||
struct bio *bio;
|
||||
int try;
|
||||
int try = (gfp_flag & GFP_NOWAIT) ? 0 : 1;
|
||||
|
||||
for (try = 0; try < 2; try++) {
|
||||
for (; try < 2; try++) {
|
||||
int bio_nr;
|
||||
|
||||
if (try)
|
||||
if (try && num_bios > 1)
|
||||
mutex_lock(&ci->io->md->table_devices_lock);
|
||||
for (bio_nr = 0; bio_nr < num_bios; bio_nr++) {
|
||||
bio = alloc_tio(ci, ti, bio_nr, len,
|
||||
@ -1491,7 +1500,7 @@ static void alloc_multiple_bios(struct bio_list *blist, struct clone_info *ci,
|
||||
|
||||
bio_list_add(blist, bio);
|
||||
}
|
||||
if (try)
|
||||
if (try && num_bios > 1)
|
||||
mutex_unlock(&ci->io->md->table_devices_lock);
|
||||
if (bio_nr == num_bios)
|
||||
return;
|
||||
@ -1501,34 +1510,31 @@ static void alloc_multiple_bios(struct bio_list *blist, struct clone_info *ci,
|
||||
}
|
||||
}
|
||||
|
||||
static int __send_duplicate_bios(struct clone_info *ci, struct dm_target *ti,
|
||||
unsigned int num_bios, unsigned int *len)
|
||||
static unsigned int __send_duplicate_bios(struct clone_info *ci, struct dm_target *ti,
|
||||
unsigned int num_bios, unsigned int *len,
|
||||
gfp_t gfp_flag)
|
||||
{
|
||||
struct bio_list blist = BIO_EMPTY_LIST;
|
||||
struct bio *clone;
|
||||
unsigned int ret = 0;
|
||||
|
||||
switch (num_bios) {
|
||||
case 0:
|
||||
break;
|
||||
case 1:
|
||||
if (len)
|
||||
setup_split_accounting(ci, *len);
|
||||
clone = alloc_tio(ci, ti, 0, len, GFP_NOIO);
|
||||
__map_bio(clone);
|
||||
ret = 1;
|
||||
break;
|
||||
default:
|
||||
if (len)
|
||||
setup_split_accounting(ci, *len);
|
||||
/* dm_accept_partial_bio() is not supported with shared tio->len_ptr */
|
||||
alloc_multiple_bios(&blist, ci, ti, num_bios, len);
|
||||
while ((clone = bio_list_pop(&blist))) {
|
||||
if (WARN_ON_ONCE(num_bios == 0)) /* num_bios = 0 is a bug in caller */
|
||||
return 0;
|
||||
|
||||
/* dm_accept_partial_bio() is not supported with shared tio->len_ptr */
|
||||
if (len)
|
||||
setup_split_accounting(ci, *len);
|
||||
|
||||
/*
|
||||
* Using alloc_multiple_bios(), even if num_bios is 1, to consistently
|
||||
* support allocating using GFP_NOWAIT with GFP_NOIO fallback.
|
||||
*/
|
||||
alloc_multiple_bios(&blist, ci, ti, num_bios, len, gfp_flag);
|
||||
while ((clone = bio_list_pop(&blist))) {
|
||||
if (num_bios > 1)
|
||||
dm_tio_set_flag(clone_to_tio(clone), DM_TIO_IS_DUPLICATE_BIO);
|
||||
__map_bio(clone);
|
||||
ret += 1;
|
||||
}
|
||||
break;
|
||||
__map_bio(clone);
|
||||
ret += 1;
|
||||
}
|
||||
|
||||
return ret;
|
||||
@ -1555,8 +1561,12 @@ static void __send_empty_flush(struct clone_info *ci)
|
||||
unsigned int bios;
|
||||
struct dm_target *ti = dm_table_get_target(t, i);
|
||||
|
||||
if (unlikely(ti->num_flush_bios == 0))
|
||||
continue;
|
||||
|
||||
atomic_add(ti->num_flush_bios, &ci->io->io_count);
|
||||
bios = __send_duplicate_bios(ci, ti, ti->num_flush_bios, NULL);
|
||||
bios = __send_duplicate_bios(ci, ti, ti->num_flush_bios,
|
||||
NULL, GFP_NOWAIT);
|
||||
atomic_sub(ti->num_flush_bios - bios, &ci->io->io_count);
|
||||
}
|
||||
|
||||
@ -1569,10 +1579,9 @@ static void __send_empty_flush(struct clone_info *ci)
|
||||
bio_uninit(ci->bio);
|
||||
}
|
||||
|
||||
static void __send_changing_extent_only(struct clone_info *ci, struct dm_target *ti,
|
||||
unsigned int num_bios,
|
||||
unsigned int max_granularity,
|
||||
unsigned int max_sectors)
|
||||
static void __send_abnormal_io(struct clone_info *ci, struct dm_target *ti,
|
||||
unsigned int num_bios, unsigned int max_granularity,
|
||||
unsigned int max_sectors)
|
||||
{
|
||||
unsigned int len, bios;
|
||||
|
||||
@ -1580,7 +1589,7 @@ static void __send_changing_extent_only(struct clone_info *ci, struct dm_target
|
||||
__max_io_len(ti, ci->sector, max_granularity, max_sectors));
|
||||
|
||||
atomic_add(num_bios, &ci->io->io_count);
|
||||
bios = __send_duplicate_bios(ci, ti, num_bios, &len);
|
||||
bios = __send_duplicate_bios(ci, ti, num_bios, &len, GFP_NOIO);
|
||||
/*
|
||||
* alloc_io() takes one extra reference for submission, so the
|
||||
* reference won't reach 0 without the following (+1) subtraction
|
||||
@ -1649,8 +1658,8 @@ static blk_status_t __process_abnormal_io(struct clone_info *ci,
|
||||
if (unlikely(!num_bios))
|
||||
return BLK_STS_NOTSUPP;
|
||||
|
||||
__send_changing_extent_only(ci, ti, num_bios,
|
||||
max_granularity, max_sectors);
|
||||
__send_abnormal_io(ci, ti, num_bios, max_granularity, max_sectors);
|
||||
|
||||
return BLK_STS_OK;
|
||||
}
|
||||
|
||||
@ -1709,10 +1718,6 @@ static blk_status_t __split_and_process_bio(struct clone_info *ci)
|
||||
if (unlikely(!ti))
|
||||
return BLK_STS_IOERR;
|
||||
|
||||
if (unlikely((ci->bio->bi_opf & REQ_NOWAIT) != 0) &&
|
||||
unlikely(!dm_target_supports_nowait(ti->type)))
|
||||
return BLK_STS_NOTSUPP;
|
||||
|
||||
if (unlikely(ci->is_abnormal_io))
|
||||
return __process_abnormal_io(ci, ti);
|
||||
|
||||
@ -1724,7 +1729,17 @@ static blk_status_t __split_and_process_bio(struct clone_info *ci)
|
||||
|
||||
len = min_t(sector_t, max_io_len(ti, ci->sector), ci->sector_count);
|
||||
setup_split_accounting(ci, len);
|
||||
clone = alloc_tio(ci, ti, 0, &len, GFP_NOIO);
|
||||
|
||||
if (unlikely(ci->bio->bi_opf & REQ_NOWAIT)) {
|
||||
if (unlikely(!dm_target_supports_nowait(ti->type)))
|
||||
return BLK_STS_NOTSUPP;
|
||||
|
||||
clone = alloc_tio(ci, ti, 0, &len, GFP_NOWAIT);
|
||||
if (unlikely(!clone))
|
||||
return BLK_STS_AGAIN;
|
||||
} else {
|
||||
clone = alloc_tio(ci, ti, 0, &len, GFP_NOIO);
|
||||
}
|
||||
__map_bio(clone);
|
||||
|
||||
ci->sector += len;
|
||||
@ -1733,11 +1748,11 @@ static blk_status_t __split_and_process_bio(struct clone_info *ci)
|
||||
return BLK_STS_OK;
|
||||
}
|
||||
|
||||
static void init_clone_info(struct clone_info *ci, struct mapped_device *md,
|
||||
static void init_clone_info(struct clone_info *ci, struct dm_io *io,
|
||||
struct dm_table *map, struct bio *bio, bool is_abnormal)
|
||||
{
|
||||
ci->map = map;
|
||||
ci->io = alloc_io(md, bio);
|
||||
ci->io = io;
|
||||
ci->bio = bio;
|
||||
ci->is_abnormal_io = is_abnormal;
|
||||
ci->submit_as_polled = false;
|
||||
@ -1772,8 +1787,18 @@ static void dm_split_and_process_bio(struct mapped_device *md,
|
||||
return;
|
||||
}
|
||||
|
||||
init_clone_info(&ci, md, map, bio, is_abnormal);
|
||||
io = ci.io;
|
||||
/* Only support nowait for normal IO */
|
||||
if (unlikely(bio->bi_opf & REQ_NOWAIT) && !is_abnormal) {
|
||||
io = alloc_io(md, bio, GFP_NOWAIT);
|
||||
if (unlikely(!io)) {
|
||||
/* Unable to do anything without dm_io. */
|
||||
bio_wouldblock_error(bio);
|
||||
return;
|
||||
}
|
||||
} else {
|
||||
io = alloc_io(md, bio, GFP_NOIO);
|
||||
}
|
||||
init_clone_info(&ci, io, map, bio, is_abnormal);
|
||||
|
||||
if (bio->bi_opf & REQ_PREFLUSH) {
|
||||
__send_empty_flush(&ci);
|
||||
|
||||
@ -188,9 +188,11 @@ void dm_kobject_release(struct kobject *kobj);
|
||||
/*
|
||||
* Targets for linear and striped mappings
|
||||
*/
|
||||
int linear_map(struct dm_target *ti, struct bio *bio);
|
||||
int dm_linear_init(void);
|
||||
void dm_linear_exit(void);
|
||||
|
||||
int stripe_map(struct dm_target *ti, struct bio *bio);
|
||||
int dm_stripe_init(void);
|
||||
void dm_stripe_exit(void);
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user