diff options
Diffstat (limited to 'drivers/md/dm-writecache.c')
-rw-r--r-- | drivers/md/dm-writecache.c | 54 |
1 files changed, 36 insertions, 18 deletions
diff --git a/drivers/md/dm-writecache.c b/drivers/md/dm-writecache.c index 4e414b06192e..ec10fda3f24f 100644 --- a/drivers/md/dm-writecache.c +++ b/drivers/md/dm-writecache.c @@ -142,6 +142,7 @@ struct dm_writecache { size_t metadata_sectors; size_t n_blocks; uint64_t seq_count; + sector_t data_device_sectors; void *block_start; struct wc_entry *entries; unsigned block_size; @@ -153,6 +154,7 @@ struct dm_writecache { bool overwrote_committed:1; bool memory_vmapped:1; + bool start_sector_set:1; bool high_wm_percent_set:1; bool low_wm_percent_set:1; bool max_writeback_jobs_set:1; @@ -161,6 +163,10 @@ struct dm_writecache { bool writeback_fua_set:1; bool flush_on_suspend:1; + unsigned high_wm_percent_value; + unsigned low_wm_percent_value; + unsigned autocommit_time_value; + unsigned writeback_all; struct workqueue_struct *writeback_wq; struct work_struct writeback_work; @@ -316,7 +322,7 @@ err1: #else static int persistent_memory_claim(struct dm_writecache *wc) { - BUG(); + return -EOPNOTSUPP; } #endif @@ -918,6 +924,8 @@ static void writecache_resume(struct dm_target *ti) wc_lock(wc); + wc->data_device_sectors = i_size_read(wc->dev->bdev->bd_inode) >> SECTOR_SHIFT; + if (WC_MODE_PMEM(wc)) { persistent_memory_invalidate_cache(wc->memory_map, wc->memory_map_size); } else { @@ -1488,6 +1496,10 @@ static bool wc_add_block(struct writeback_struct *wb, struct wc_entry *e, gfp_t void *address = memory_data(wc, e); persistent_memory_flush_cache(address, block_size); + + if (unlikely(bio_end_sector(&wb->bio) >= wc->data_device_sectors)) + return true; + return bio_add_page(&wb->bio, persistent_memory_page(address), block_size, persistent_memory_page_offset(address)) != 0; } @@ -1559,6 +1571,9 @@ static void __writecache_writeback_pmem(struct dm_writecache *wc, struct writeba if (writecache_has_error(wc)) { bio->bi_status = BLK_STS_IOERR; bio_endio(bio); + } else if (unlikely(!bio_sectors(bio))) { + bio->bi_status = BLK_STS_OK; + bio_endio(bio); } else { submit_bio(bio); } @@ -1602,6 +1617,14 @@ static void __writecache_writeback_ssd(struct dm_writecache *wc, struct writebac e = f; } + if (unlikely(to.sector + to.count > wc->data_device_sectors)) { + if (to.sector >= wc->data_device_sectors) { + writecache_copy_endio(0, 0, c); + continue; + } + from.count = to.count = wc->data_device_sectors - to.sector; + } + dm_kcopyd_copy(wc->dm_kcopyd, &from, 1, &to, 0, writecache_copy_endio, c); __writeback_throttle(wc, wbl); @@ -1889,7 +1912,7 @@ static int writecache_ctr(struct dm_target *ti, unsigned argc, char **argv) struct wc_memory_superblock s; static struct dm_arg _args[] = { - {0, 10, "Invalid number of feature args"}, + {0, 16, "Invalid number of feature args"}, }; as.argc = argc; @@ -2051,6 +2074,7 @@ static int writecache_ctr(struct dm_target *ti, unsigned argc, char **argv) if (sscanf(string, "%llu%c", &start_sector, &dummy) != 1) goto invalid_optional; wc->start_sector = start_sector; + wc->start_sector_set = true; if (wc->start_sector != start_sector || wc->start_sector >= wc->memory_map_size >> SECTOR_SHIFT) goto invalid_optional; @@ -2060,6 +2084,7 @@ static int writecache_ctr(struct dm_target *ti, unsigned argc, char **argv) goto invalid_optional; if (high_wm_percent < 0 || high_wm_percent > 100) goto invalid_optional; + wc->high_wm_percent_value = high_wm_percent; wc->high_wm_percent_set = true; } else if (!strcasecmp(string, "low_watermark") && opt_params >= 1) { string = dm_shift_arg(&as), opt_params--; @@ -2067,6 +2092,7 @@ static int writecache_ctr(struct dm_target *ti, unsigned argc, char **argv) goto invalid_optional; if (low_wm_percent < 0 || low_wm_percent > 100) goto invalid_optional; + wc->low_wm_percent_value = low_wm_percent; wc->low_wm_percent_set = true; } else if (!strcasecmp(string, "writeback_jobs") && opt_params >= 1) { string = dm_shift_arg(&as), opt_params--; @@ -2086,6 +2112,7 @@ static int writecache_ctr(struct dm_target *ti, unsigned argc, char **argv) if (autocommit_msecs > 3600000) goto invalid_optional; wc->autocommit_jiffies = msecs_to_jiffies(autocommit_msecs); + wc->autocommit_time_value = autocommit_msecs; wc->autocommit_time_set = true; } else if (!strcasecmp(string, "fua")) { if (WC_MODE_PMEM(wc)) { @@ -2287,7 +2314,6 @@ static void writecache_status(struct dm_target *ti, status_type_t type, struct dm_writecache *wc = ti->private; unsigned extra_args; unsigned sz = 0; - uint64_t x; switch (type) { case STATUSTYPE_INFO: @@ -2299,7 +2325,7 @@ static void writecache_status(struct dm_target *ti, status_type_t type, DMEMIT("%c %s %s %u ", WC_MODE_PMEM(wc) ? 'p' : 's', wc->dev->name, wc->ssd_dev->name, wc->block_size); extra_args = 0; - if (wc->start_sector) + if (wc->start_sector_set) extra_args += 2; if (wc->high_wm_percent_set) extra_args += 2; @@ -2315,26 +2341,18 @@ static void writecache_status(struct dm_target *ti, status_type_t type, extra_args++; DMEMIT("%u", extra_args); - if (wc->start_sector) + if (wc->start_sector_set) DMEMIT(" start_sector %llu", (unsigned long long)wc->start_sector); - if (wc->high_wm_percent_set) { - x = (uint64_t)wc->freelist_high_watermark * 100; - x += wc->n_blocks / 2; - do_div(x, (size_t)wc->n_blocks); - DMEMIT(" high_watermark %u", 100 - (unsigned)x); - } - if (wc->low_wm_percent_set) { - x = (uint64_t)wc->freelist_low_watermark * 100; - x += wc->n_blocks / 2; - do_div(x, (size_t)wc->n_blocks); - DMEMIT(" low_watermark %u", 100 - (unsigned)x); - } + if (wc->high_wm_percent_set) + DMEMIT(" high_watermark %u", wc->high_wm_percent_value); + if (wc->low_wm_percent_set) + DMEMIT(" low_watermark %u", wc->low_wm_percent_value); if (wc->max_writeback_jobs_set) DMEMIT(" writeback_jobs %u", wc->max_writeback_jobs); if (wc->autocommit_blocks_set) DMEMIT(" autocommit_blocks %u", wc->autocommit_blocks); if (wc->autocommit_time_set) - DMEMIT(" autocommit_time %u", jiffies_to_msecs(wc->autocommit_jiffies)); + DMEMIT(" autocommit_time %u", wc->autocommit_time_value); if (wc->writeback_fua_set) DMEMIT(" %sfua", wc->writeback_fua ? "" : "no"); break; |