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2035 lines
51 KiB
2035 lines
51 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/bitops.h> |
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#include <linux/slab.h> |
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#include <linux/blkdev.h> |
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#include <linux/sched/mm.h> |
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#include <linux/atomic.h> |
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#include <linux/vmalloc.h> |
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#include "ctree.h" |
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#include "volumes.h" |
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#include "zoned.h" |
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#include "rcu-string.h" |
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#include "disk-io.h" |
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#include "block-group.h" |
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#include "transaction.h" |
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#include "dev-replace.h" |
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#include "space-info.h" |
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|
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/* Maximum number of zones to report per blkdev_report_zones() call */ |
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#define BTRFS_REPORT_NR_ZONES 4096 |
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/* Invalid allocation pointer value for missing devices */ |
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#define WP_MISSING_DEV ((u64)-1) |
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/* Pseudo write pointer value for conventional zone */ |
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#define WP_CONVENTIONAL ((u64)-2) |
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|
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/* |
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* Location of the first zone of superblock logging zone pairs. |
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* |
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* - primary superblock: 0B (zone 0) |
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* - first copy: 512G (zone starting at that offset) |
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* - second copy: 4T (zone starting at that offset) |
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*/ |
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#define BTRFS_SB_LOG_PRIMARY_OFFSET (0ULL) |
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#define BTRFS_SB_LOG_FIRST_OFFSET (512ULL * SZ_1G) |
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#define BTRFS_SB_LOG_SECOND_OFFSET (4096ULL * SZ_1G) |
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|
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#define BTRFS_SB_LOG_FIRST_SHIFT const_ilog2(BTRFS_SB_LOG_FIRST_OFFSET) |
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#define BTRFS_SB_LOG_SECOND_SHIFT const_ilog2(BTRFS_SB_LOG_SECOND_OFFSET) |
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|
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/* Number of superblock log zones */ |
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#define BTRFS_NR_SB_LOG_ZONES 2 |
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|
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/* |
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* Minimum of active zones we need: |
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* |
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* - BTRFS_SUPER_MIRROR_MAX zones for superblock mirrors |
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* - 3 zones to ensure at least one zone per SYSTEM, META and DATA block group |
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* - 1 zone for tree-log dedicated block group |
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* - 1 zone for relocation |
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*/ |
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#define BTRFS_MIN_ACTIVE_ZONES (BTRFS_SUPER_MIRROR_MAX + 5) |
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|
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/* |
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* Maximum supported zone size. Currently, SMR disks have a zone size of |
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* 256MiB, and we are expecting ZNS drives to be in the 1-4GiB range. We do not |
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* expect the zone size to become larger than 8GiB in the near future. |
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*/ |
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#define BTRFS_MAX_ZONE_SIZE SZ_8G |
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|
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#define SUPER_INFO_SECTORS ((u64)BTRFS_SUPER_INFO_SIZE >> SECTOR_SHIFT) |
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|
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static inline bool sb_zone_is_full(const struct blk_zone *zone) |
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{ |
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return (zone->cond == BLK_ZONE_COND_FULL) || |
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(zone->wp + SUPER_INFO_SECTORS > zone->start + zone->capacity); |
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} |
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|
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static int copy_zone_info_cb(struct blk_zone *zone, unsigned int idx, void *data) |
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{ |
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struct blk_zone *zones = data; |
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|
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memcpy(&zones[idx], zone, sizeof(*zone)); |
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|
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return 0; |
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} |
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|
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static int sb_write_pointer(struct block_device *bdev, struct blk_zone *zones, |
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u64 *wp_ret) |
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{ |
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bool empty[BTRFS_NR_SB_LOG_ZONES]; |
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bool full[BTRFS_NR_SB_LOG_ZONES]; |
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sector_t sector; |
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int i; |
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|
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for (i = 0; i < BTRFS_NR_SB_LOG_ZONES; i++) { |
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ASSERT(zones[i].type != BLK_ZONE_TYPE_CONVENTIONAL); |
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empty[i] = (zones[i].cond == BLK_ZONE_COND_EMPTY); |
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full[i] = sb_zone_is_full(&zones[i]); |
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} |
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|
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/* |
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* Possible states of log buffer zones |
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* |
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* Empty[0] In use[0] Full[0] |
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* Empty[1] * x 0 |
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* In use[1] 0 x 0 |
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* Full[1] 1 1 C |
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* |
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* Log position: |
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* *: Special case, no superblock is written |
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* 0: Use write pointer of zones[0] |
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* 1: Use write pointer of zones[1] |
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* C: Compare super blocks from zones[0] and zones[1], use the latest |
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* one determined by generation |
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* x: Invalid state |
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*/ |
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|
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if (empty[0] && empty[1]) { |
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/* Special case to distinguish no superblock to read */ |
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*wp_ret = zones[0].start << SECTOR_SHIFT; |
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return -ENOENT; |
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} else if (full[0] && full[1]) { |
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/* Compare two super blocks */ |
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struct address_space *mapping = bdev->bd_inode->i_mapping; |
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struct page *page[BTRFS_NR_SB_LOG_ZONES]; |
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struct btrfs_super_block *super[BTRFS_NR_SB_LOG_ZONES]; |
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int i; |
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|
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for (i = 0; i < BTRFS_NR_SB_LOG_ZONES; i++) { |
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u64 bytenr; |
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|
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bytenr = ((zones[i].start + zones[i].len) |
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<< SECTOR_SHIFT) - BTRFS_SUPER_INFO_SIZE; |
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|
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page[i] = read_cache_page_gfp(mapping, |
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bytenr >> PAGE_SHIFT, GFP_NOFS); |
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if (IS_ERR(page[i])) { |
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if (i == 1) |
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btrfs_release_disk_super(super[0]); |
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return PTR_ERR(page[i]); |
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} |
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super[i] = page_address(page[i]); |
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} |
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|
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if (super[0]->generation > super[1]->generation) |
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sector = zones[1].start; |
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else |
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sector = zones[0].start; |
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|
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for (i = 0; i < BTRFS_NR_SB_LOG_ZONES; i++) |
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btrfs_release_disk_super(super[i]); |
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} else if (!full[0] && (empty[1] || full[1])) { |
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sector = zones[0].wp; |
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} else if (full[0]) { |
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sector = zones[1].wp; |
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} else { |
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return -EUCLEAN; |
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} |
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*wp_ret = sector << SECTOR_SHIFT; |
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return 0; |
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} |
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|
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/* |
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* Get the first zone number of the superblock mirror |
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*/ |
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static inline u32 sb_zone_number(int shift, int mirror) |
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{ |
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u64 zone; |
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|
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ASSERT(mirror < BTRFS_SUPER_MIRROR_MAX); |
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switch (mirror) { |
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case 0: zone = 0; break; |
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case 1: zone = 1ULL << (BTRFS_SB_LOG_FIRST_SHIFT - shift); break; |
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case 2: zone = 1ULL << (BTRFS_SB_LOG_SECOND_SHIFT - shift); break; |
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} |
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|
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ASSERT(zone <= U32_MAX); |
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|
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return (u32)zone; |
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} |
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|
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static inline sector_t zone_start_sector(u32 zone_number, |
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struct block_device *bdev) |
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{ |
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return (sector_t)zone_number << ilog2(bdev_zone_sectors(bdev)); |
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} |
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|
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static inline u64 zone_start_physical(u32 zone_number, |
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struct btrfs_zoned_device_info *zone_info) |
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{ |
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return (u64)zone_number << zone_info->zone_size_shift; |
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} |
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|
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/* |
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* Emulate blkdev_report_zones() for a non-zoned device. It slices up the block |
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* device into static sized chunks and fake a conventional zone on each of |
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* them. |
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*/ |
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static int emulate_report_zones(struct btrfs_device *device, u64 pos, |
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struct blk_zone *zones, unsigned int nr_zones) |
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{ |
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const sector_t zone_sectors = device->fs_info->zone_size >> SECTOR_SHIFT; |
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sector_t bdev_size = bdev_nr_sectors(device->bdev); |
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unsigned int i; |
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pos >>= SECTOR_SHIFT; |
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for (i = 0; i < nr_zones; i++) { |
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zones[i].start = i * zone_sectors + pos; |
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zones[i].len = zone_sectors; |
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zones[i].capacity = zone_sectors; |
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zones[i].wp = zones[i].start + zone_sectors; |
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zones[i].type = BLK_ZONE_TYPE_CONVENTIONAL; |
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zones[i].cond = BLK_ZONE_COND_NOT_WP; |
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|
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if (zones[i].wp >= bdev_size) { |
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i++; |
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break; |
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} |
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} |
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|
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return i; |
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} |
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|
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static int btrfs_get_dev_zones(struct btrfs_device *device, u64 pos, |
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struct blk_zone *zones, unsigned int *nr_zones) |
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{ |
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struct btrfs_zoned_device_info *zinfo = device->zone_info; |
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u32 zno; |
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int ret; |
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|
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if (!*nr_zones) |
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return 0; |
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|
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if (!bdev_is_zoned(device->bdev)) { |
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ret = emulate_report_zones(device, pos, zones, *nr_zones); |
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*nr_zones = ret; |
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return 0; |
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} |
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|
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/* Check cache */ |
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if (zinfo->zone_cache) { |
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unsigned int i; |
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|
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ASSERT(IS_ALIGNED(pos, zinfo->zone_size)); |
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zno = pos >> zinfo->zone_size_shift; |
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/* |
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* We cannot report zones beyond the zone end. So, it is OK to |
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* cap *nr_zones to at the end. |
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*/ |
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*nr_zones = min_t(u32, *nr_zones, zinfo->nr_zones - zno); |
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|
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for (i = 0; i < *nr_zones; i++) { |
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struct blk_zone *zone_info; |
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|
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zone_info = &zinfo->zone_cache[zno + i]; |
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if (!zone_info->len) |
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break; |
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} |
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|
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if (i == *nr_zones) { |
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/* Cache hit on all the zones */ |
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memcpy(zones, zinfo->zone_cache + zno, |
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sizeof(*zinfo->zone_cache) * *nr_zones); |
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return 0; |
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} |
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} |
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|
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ret = blkdev_report_zones(device->bdev, pos >> SECTOR_SHIFT, *nr_zones, |
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copy_zone_info_cb, zones); |
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if (ret < 0) { |
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btrfs_err_in_rcu(device->fs_info, |
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"zoned: failed to read zone %llu on %s (devid %llu)", |
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pos, rcu_str_deref(device->name), |
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device->devid); |
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return ret; |
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} |
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*nr_zones = ret; |
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if (!ret) |
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return -EIO; |
|
|
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/* Populate cache */ |
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if (zinfo->zone_cache) |
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memcpy(zinfo->zone_cache + zno, zones, |
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sizeof(*zinfo->zone_cache) * *nr_zones); |
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|
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return 0; |
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} |
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|
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/* The emulated zone size is determined from the size of device extent */ |
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static int calculate_emulated_zone_size(struct btrfs_fs_info *fs_info) |
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{ |
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struct btrfs_path *path; |
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struct btrfs_root *root = fs_info->dev_root; |
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struct btrfs_key key; |
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struct extent_buffer *leaf; |
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struct btrfs_dev_extent *dext; |
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int ret = 0; |
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|
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key.objectid = 1; |
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key.type = BTRFS_DEV_EXTENT_KEY; |
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key.offset = 0; |
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|
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path = btrfs_alloc_path(); |
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if (!path) |
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return -ENOMEM; |
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|
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ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); |
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if (ret < 0) |
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goto out; |
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|
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if (path->slots[0] >= btrfs_header_nritems(path->nodes[0])) { |
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ret = btrfs_next_leaf(root, path); |
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if (ret < 0) |
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goto out; |
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/* No dev extents at all? Not good */ |
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if (ret > 0) { |
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ret = -EUCLEAN; |
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goto out; |
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} |
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} |
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|
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leaf = path->nodes[0]; |
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dext = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_dev_extent); |
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fs_info->zone_size = btrfs_dev_extent_length(leaf, dext); |
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ret = 0; |
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|
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out: |
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btrfs_free_path(path); |
|
|
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return ret; |
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} |
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|
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int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info) |
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{ |
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struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; |
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struct btrfs_device *device; |
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int ret = 0; |
|
|
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/* fs_info->zone_size might not set yet. Use the incomapt flag here. */ |
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if (!btrfs_fs_incompat(fs_info, ZONED)) |
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return 0; |
|
|
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mutex_lock(&fs_devices->device_list_mutex); |
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list_for_each_entry(device, &fs_devices->devices, dev_list) { |
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/* We can skip reading of zone info for missing devices */ |
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if (!device->bdev) |
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continue; |
|
|
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ret = btrfs_get_dev_zone_info(device, true); |
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if (ret) |
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break; |
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} |
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mutex_unlock(&fs_devices->device_list_mutex); |
|
|
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return ret; |
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} |
|
|
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int btrfs_get_dev_zone_info(struct btrfs_device *device, bool populate_cache) |
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{ |
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struct btrfs_fs_info *fs_info = device->fs_info; |
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struct btrfs_zoned_device_info *zone_info = NULL; |
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struct block_device *bdev = device->bdev; |
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struct request_queue *queue = bdev_get_queue(bdev); |
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unsigned int max_active_zones; |
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unsigned int nactive; |
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sector_t nr_sectors; |
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sector_t sector = 0; |
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struct blk_zone *zones = NULL; |
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unsigned int i, nreported = 0, nr_zones; |
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sector_t zone_sectors; |
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char *model, *emulated; |
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int ret; |
|
|
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/* |
|
* Cannot use btrfs_is_zoned here, since fs_info::zone_size might not |
|
* yet be set. |
|
*/ |
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if (!btrfs_fs_incompat(fs_info, ZONED)) |
|
return 0; |
|
|
|
if (device->zone_info) |
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return 0; |
|
|
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zone_info = kzalloc(sizeof(*zone_info), GFP_KERNEL); |
|
if (!zone_info) |
|
return -ENOMEM; |
|
|
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device->zone_info = zone_info; |
|
|
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if (!bdev_is_zoned(bdev)) { |
|
if (!fs_info->zone_size) { |
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ret = calculate_emulated_zone_size(fs_info); |
|
if (ret) |
|
goto out; |
|
} |
|
|
|
ASSERT(fs_info->zone_size); |
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zone_sectors = fs_info->zone_size >> SECTOR_SHIFT; |
|
} else { |
|
zone_sectors = bdev_zone_sectors(bdev); |
|
} |
|
|
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/* Check if it's power of 2 (see is_power_of_2) */ |
|
ASSERT(zone_sectors != 0 && (zone_sectors & (zone_sectors - 1)) == 0); |
|
zone_info->zone_size = zone_sectors << SECTOR_SHIFT; |
|
|
|
/* We reject devices with a zone size larger than 8GB */ |
|
if (zone_info->zone_size > BTRFS_MAX_ZONE_SIZE) { |
|
btrfs_err_in_rcu(fs_info, |
|
"zoned: %s: zone size %llu larger than supported maximum %llu", |
|
rcu_str_deref(device->name), |
|
zone_info->zone_size, BTRFS_MAX_ZONE_SIZE); |
|
ret = -EINVAL; |
|
goto out; |
|
} |
|
|
|
nr_sectors = bdev_nr_sectors(bdev); |
|
zone_info->zone_size_shift = ilog2(zone_info->zone_size); |
|
zone_info->nr_zones = nr_sectors >> ilog2(zone_sectors); |
|
if (!IS_ALIGNED(nr_sectors, zone_sectors)) |
|
zone_info->nr_zones++; |
|
|
|
max_active_zones = queue_max_active_zones(queue); |
|
if (max_active_zones && max_active_zones < BTRFS_MIN_ACTIVE_ZONES) { |
|
btrfs_err_in_rcu(fs_info, |
|
"zoned: %s: max active zones %u is too small, need at least %u active zones", |
|
rcu_str_deref(device->name), max_active_zones, |
|
BTRFS_MIN_ACTIVE_ZONES); |
|
ret = -EINVAL; |
|
goto out; |
|
} |
|
zone_info->max_active_zones = max_active_zones; |
|
|
|
zone_info->seq_zones = bitmap_zalloc(zone_info->nr_zones, GFP_KERNEL); |
|
if (!zone_info->seq_zones) { |
|
ret = -ENOMEM; |
|
goto out; |
|
} |
|
|
|
zone_info->empty_zones = bitmap_zalloc(zone_info->nr_zones, GFP_KERNEL); |
|
if (!zone_info->empty_zones) { |
|
ret = -ENOMEM; |
|
goto out; |
|
} |
|
|
|
zone_info->active_zones = bitmap_zalloc(zone_info->nr_zones, GFP_KERNEL); |
|
if (!zone_info->active_zones) { |
|
ret = -ENOMEM; |
|
goto out; |
|
} |
|
|
|
zones = kcalloc(BTRFS_REPORT_NR_ZONES, sizeof(struct blk_zone), GFP_KERNEL); |
|
if (!zones) { |
|
ret = -ENOMEM; |
|
goto out; |
|
} |
|
|
|
/* |
|
* Enable zone cache only for a zoned device. On a non-zoned device, we |
|
* fill the zone info with emulated CONVENTIONAL zones, so no need to |
|
* use the cache. |
|
*/ |
|
if (populate_cache && bdev_is_zoned(device->bdev)) { |
|
zone_info->zone_cache = vzalloc(sizeof(struct blk_zone) * |
|
zone_info->nr_zones); |
|
if (!zone_info->zone_cache) { |
|
btrfs_err_in_rcu(device->fs_info, |
|
"zoned: failed to allocate zone cache for %s", |
|
rcu_str_deref(device->name)); |
|
ret = -ENOMEM; |
|
goto out; |
|
} |
|
} |
|
|
|
/* Get zones type */ |
|
nactive = 0; |
|
while (sector < nr_sectors) { |
|
nr_zones = BTRFS_REPORT_NR_ZONES; |
|
ret = btrfs_get_dev_zones(device, sector << SECTOR_SHIFT, zones, |
|
&nr_zones); |
|
if (ret) |
|
goto out; |
|
|
|
for (i = 0; i < nr_zones; i++) { |
|
if (zones[i].type == BLK_ZONE_TYPE_SEQWRITE_REQ) |
|
__set_bit(nreported, zone_info->seq_zones); |
|
switch (zones[i].cond) { |
|
case BLK_ZONE_COND_EMPTY: |
|
__set_bit(nreported, zone_info->empty_zones); |
|
break; |
|
case BLK_ZONE_COND_IMP_OPEN: |
|
case BLK_ZONE_COND_EXP_OPEN: |
|
case BLK_ZONE_COND_CLOSED: |
|
__set_bit(nreported, zone_info->active_zones); |
|
nactive++; |
|
break; |
|
} |
|
nreported++; |
|
} |
|
sector = zones[nr_zones - 1].start + zones[nr_zones - 1].len; |
|
} |
|
|
|
if (nreported != zone_info->nr_zones) { |
|
btrfs_err_in_rcu(device->fs_info, |
|
"inconsistent number of zones on %s (%u/%u)", |
|
rcu_str_deref(device->name), nreported, |
|
zone_info->nr_zones); |
|
ret = -EIO; |
|
goto out; |
|
} |
|
|
|
if (max_active_zones) { |
|
if (nactive > max_active_zones) { |
|
btrfs_err_in_rcu(device->fs_info, |
|
"zoned: %u active zones on %s exceeds max_active_zones %u", |
|
nactive, rcu_str_deref(device->name), |
|
max_active_zones); |
|
ret = -EIO; |
|
goto out; |
|
} |
|
atomic_set(&zone_info->active_zones_left, |
|
max_active_zones - nactive); |
|
} |
|
|
|
/* Validate superblock log */ |
|
nr_zones = BTRFS_NR_SB_LOG_ZONES; |
|
for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) { |
|
u32 sb_zone; |
|
u64 sb_wp; |
|
int sb_pos = BTRFS_NR_SB_LOG_ZONES * i; |
|
|
|
sb_zone = sb_zone_number(zone_info->zone_size_shift, i); |
|
if (sb_zone + 1 >= zone_info->nr_zones) |
|
continue; |
|
|
|
ret = btrfs_get_dev_zones(device, |
|
zone_start_physical(sb_zone, zone_info), |
|
&zone_info->sb_zones[sb_pos], |
|
&nr_zones); |
|
if (ret) |
|
goto out; |
|
|
|
if (nr_zones != BTRFS_NR_SB_LOG_ZONES) { |
|
btrfs_err_in_rcu(device->fs_info, |
|
"zoned: failed to read super block log zone info at devid %llu zone %u", |
|
device->devid, sb_zone); |
|
ret = -EUCLEAN; |
|
goto out; |
|
} |
|
|
|
/* |
|
* If zones[0] is conventional, always use the beginning of the |
|
* zone to record superblock. No need to validate in that case. |
|
*/ |
|
if (zone_info->sb_zones[BTRFS_NR_SB_LOG_ZONES * i].type == |
|
BLK_ZONE_TYPE_CONVENTIONAL) |
|
continue; |
|
|
|
ret = sb_write_pointer(device->bdev, |
|
&zone_info->sb_zones[sb_pos], &sb_wp); |
|
if (ret != -ENOENT && ret) { |
|
btrfs_err_in_rcu(device->fs_info, |
|
"zoned: super block log zone corrupted devid %llu zone %u", |
|
device->devid, sb_zone); |
|
ret = -EUCLEAN; |
|
goto out; |
|
} |
|
} |
|
|
|
|
|
kfree(zones); |
|
|
|
switch (bdev_zoned_model(bdev)) { |
|
case BLK_ZONED_HM: |
|
model = "host-managed zoned"; |
|
emulated = ""; |
|
break; |
|
case BLK_ZONED_HA: |
|
model = "host-aware zoned"; |
|
emulated = ""; |
|
break; |
|
case BLK_ZONED_NONE: |
|
model = "regular"; |
|
emulated = "emulated "; |
|
break; |
|
default: |
|
/* Just in case */ |
|
btrfs_err_in_rcu(fs_info, "zoned: unsupported model %d on %s", |
|
bdev_zoned_model(bdev), |
|
rcu_str_deref(device->name)); |
|
ret = -EOPNOTSUPP; |
|
goto out_free_zone_info; |
|
} |
|
|
|
btrfs_info_in_rcu(fs_info, |
|
"%s block device %s, %u %szones of %llu bytes", |
|
model, rcu_str_deref(device->name), zone_info->nr_zones, |
|
emulated, zone_info->zone_size); |
|
|
|
return 0; |
|
|
|
out: |
|
kfree(zones); |
|
out_free_zone_info: |
|
btrfs_destroy_dev_zone_info(device); |
|
|
|
return ret; |
|
} |
|
|
|
void btrfs_destroy_dev_zone_info(struct btrfs_device *device) |
|
{ |
|
struct btrfs_zoned_device_info *zone_info = device->zone_info; |
|
|
|
if (!zone_info) |
|
return; |
|
|
|
bitmap_free(zone_info->active_zones); |
|
bitmap_free(zone_info->seq_zones); |
|
bitmap_free(zone_info->empty_zones); |
|
vfree(zone_info->zone_cache); |
|
kfree(zone_info); |
|
device->zone_info = NULL; |
|
} |
|
|
|
int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, |
|
struct blk_zone *zone) |
|
{ |
|
unsigned int nr_zones = 1; |
|
int ret; |
|
|
|
ret = btrfs_get_dev_zones(device, pos, zone, &nr_zones); |
|
if (ret != 0 || !nr_zones) |
|
return ret ? ret : -EIO; |
|
|
|
return 0; |
|
} |
|
|
|
int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info) |
|
{ |
|
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; |
|
struct btrfs_device *device; |
|
u64 zoned_devices = 0; |
|
u64 nr_devices = 0; |
|
u64 zone_size = 0; |
|
const bool incompat_zoned = btrfs_fs_incompat(fs_info, ZONED); |
|
int ret = 0; |
|
|
|
/* Count zoned devices */ |
|
list_for_each_entry(device, &fs_devices->devices, dev_list) { |
|
enum blk_zoned_model model; |
|
|
|
if (!device->bdev) |
|
continue; |
|
|
|
model = bdev_zoned_model(device->bdev); |
|
/* |
|
* A Host-Managed zoned device must be used as a zoned device. |
|
* A Host-Aware zoned device and a non-zoned devices can be |
|
* treated as a zoned device, if ZONED flag is enabled in the |
|
* superblock. |
|
*/ |
|
if (model == BLK_ZONED_HM || |
|
(model == BLK_ZONED_HA && incompat_zoned) || |
|
(model == BLK_ZONED_NONE && incompat_zoned)) { |
|
struct btrfs_zoned_device_info *zone_info = |
|
device->zone_info; |
|
|
|
zone_info = device->zone_info; |
|
zoned_devices++; |
|
if (!zone_size) { |
|
zone_size = zone_info->zone_size; |
|
} else if (zone_info->zone_size != zone_size) { |
|
btrfs_err(fs_info, |
|
"zoned: unequal block device zone sizes: have %llu found %llu", |
|
device->zone_info->zone_size, |
|
zone_size); |
|
ret = -EINVAL; |
|
goto out; |
|
} |
|
} |
|
nr_devices++; |
|
} |
|
|
|
if (!zoned_devices && !incompat_zoned) |
|
goto out; |
|
|
|
if (!zoned_devices && incompat_zoned) { |
|
/* No zoned block device found on ZONED filesystem */ |
|
btrfs_err(fs_info, |
|
"zoned: no zoned devices found on a zoned filesystem"); |
|
ret = -EINVAL; |
|
goto out; |
|
} |
|
|
|
if (zoned_devices && !incompat_zoned) { |
|
btrfs_err(fs_info, |
|
"zoned: mode not enabled but zoned device found"); |
|
ret = -EINVAL; |
|
goto out; |
|
} |
|
|
|
if (zoned_devices != nr_devices) { |
|
btrfs_err(fs_info, |
|
"zoned: cannot mix zoned and regular devices"); |
|
ret = -EINVAL; |
|
goto out; |
|
} |
|
|
|
/* |
|
* stripe_size is always aligned to BTRFS_STRIPE_LEN in |
|
* btrfs_create_chunk(). Since we want stripe_len == zone_size, |
|
* check the alignment here. |
|
*/ |
|
if (!IS_ALIGNED(zone_size, BTRFS_STRIPE_LEN)) { |
|
btrfs_err(fs_info, |
|
"zoned: zone size %llu not aligned to stripe %u", |
|
zone_size, BTRFS_STRIPE_LEN); |
|
ret = -EINVAL; |
|
goto out; |
|
} |
|
|
|
if (btrfs_fs_incompat(fs_info, MIXED_GROUPS)) { |
|
btrfs_err(fs_info, "zoned: mixed block groups not supported"); |
|
ret = -EINVAL; |
|
goto out; |
|
} |
|
|
|
fs_info->zone_size = zone_size; |
|
fs_info->fs_devices->chunk_alloc_policy = BTRFS_CHUNK_ALLOC_ZONED; |
|
|
|
/* |
|
* Check mount options here, because we might change fs_info->zoned |
|
* from fs_info->zone_size. |
|
*/ |
|
ret = btrfs_check_mountopts_zoned(fs_info); |
|
if (ret) |
|
goto out; |
|
|
|
btrfs_info(fs_info, "zoned mode enabled with zone size %llu", zone_size); |
|
out: |
|
return ret; |
|
} |
|
|
|
int btrfs_check_mountopts_zoned(struct btrfs_fs_info *info) |
|
{ |
|
if (!btrfs_is_zoned(info)) |
|
return 0; |
|
|
|
/* |
|
* Space cache writing is not COWed. Disable that to avoid write errors |
|
* in sequential zones. |
|
*/ |
|
if (btrfs_test_opt(info, SPACE_CACHE)) { |
|
btrfs_err(info, "zoned: space cache v1 is not supported"); |
|
return -EINVAL; |
|
} |
|
|
|
if (btrfs_test_opt(info, NODATACOW)) { |
|
btrfs_err(info, "zoned: NODATACOW not supported"); |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int sb_log_location(struct block_device *bdev, struct blk_zone *zones, |
|
int rw, u64 *bytenr_ret) |
|
{ |
|
u64 wp; |
|
int ret; |
|
|
|
if (zones[0].type == BLK_ZONE_TYPE_CONVENTIONAL) { |
|
*bytenr_ret = zones[0].start << SECTOR_SHIFT; |
|
return 0; |
|
} |
|
|
|
ret = sb_write_pointer(bdev, zones, &wp); |
|
if (ret != -ENOENT && ret < 0) |
|
return ret; |
|
|
|
if (rw == WRITE) { |
|
struct blk_zone *reset = NULL; |
|
|
|
if (wp == zones[0].start << SECTOR_SHIFT) |
|
reset = &zones[0]; |
|
else if (wp == zones[1].start << SECTOR_SHIFT) |
|
reset = &zones[1]; |
|
|
|
if (reset && reset->cond != BLK_ZONE_COND_EMPTY) { |
|
ASSERT(sb_zone_is_full(reset)); |
|
|
|
ret = blkdev_zone_mgmt(bdev, REQ_OP_ZONE_RESET, |
|
reset->start, reset->len, |
|
GFP_NOFS); |
|
if (ret) |
|
return ret; |
|
|
|
reset->cond = BLK_ZONE_COND_EMPTY; |
|
reset->wp = reset->start; |
|
} |
|
} else if (ret != -ENOENT) { |
|
/* |
|
* For READ, we want the previous one. Move write pointer to |
|
* the end of a zone, if it is at the head of a zone. |
|
*/ |
|
u64 zone_end = 0; |
|
|
|
if (wp == zones[0].start << SECTOR_SHIFT) |
|
zone_end = zones[1].start + zones[1].capacity; |
|
else if (wp == zones[1].start << SECTOR_SHIFT) |
|
zone_end = zones[0].start + zones[0].capacity; |
|
if (zone_end) |
|
wp = ALIGN_DOWN(zone_end << SECTOR_SHIFT, |
|
BTRFS_SUPER_INFO_SIZE); |
|
|
|
wp -= BTRFS_SUPER_INFO_SIZE; |
|
} |
|
|
|
*bytenr_ret = wp; |
|
return 0; |
|
|
|
} |
|
|
|
int btrfs_sb_log_location_bdev(struct block_device *bdev, int mirror, int rw, |
|
u64 *bytenr_ret) |
|
{ |
|
struct blk_zone zones[BTRFS_NR_SB_LOG_ZONES]; |
|
sector_t zone_sectors; |
|
u32 sb_zone; |
|
int ret; |
|
u8 zone_sectors_shift; |
|
sector_t nr_sectors; |
|
u32 nr_zones; |
|
|
|
if (!bdev_is_zoned(bdev)) { |
|
*bytenr_ret = btrfs_sb_offset(mirror); |
|
return 0; |
|
} |
|
|
|
ASSERT(rw == READ || rw == WRITE); |
|
|
|
zone_sectors = bdev_zone_sectors(bdev); |
|
if (!is_power_of_2(zone_sectors)) |
|
return -EINVAL; |
|
zone_sectors_shift = ilog2(zone_sectors); |
|
nr_sectors = bdev_nr_sectors(bdev); |
|
nr_zones = nr_sectors >> zone_sectors_shift; |
|
|
|
sb_zone = sb_zone_number(zone_sectors_shift + SECTOR_SHIFT, mirror); |
|
if (sb_zone + 1 >= nr_zones) |
|
return -ENOENT; |
|
|
|
ret = blkdev_report_zones(bdev, zone_start_sector(sb_zone, bdev), |
|
BTRFS_NR_SB_LOG_ZONES, copy_zone_info_cb, |
|
zones); |
|
if (ret < 0) |
|
return ret; |
|
if (ret != BTRFS_NR_SB_LOG_ZONES) |
|
return -EIO; |
|
|
|
return sb_log_location(bdev, zones, rw, bytenr_ret); |
|
} |
|
|
|
int btrfs_sb_log_location(struct btrfs_device *device, int mirror, int rw, |
|
u64 *bytenr_ret) |
|
{ |
|
struct btrfs_zoned_device_info *zinfo = device->zone_info; |
|
u32 zone_num; |
|
|
|
/* |
|
* For a zoned filesystem on a non-zoned block device, use the same |
|
* super block locations as regular filesystem. Doing so, the super |
|
* block can always be retrieved and the zoned flag of the volume |
|
* detected from the super block information. |
|
*/ |
|
if (!bdev_is_zoned(device->bdev)) { |
|
*bytenr_ret = btrfs_sb_offset(mirror); |
|
return 0; |
|
} |
|
|
|
zone_num = sb_zone_number(zinfo->zone_size_shift, mirror); |
|
if (zone_num + 1 >= zinfo->nr_zones) |
|
return -ENOENT; |
|
|
|
return sb_log_location(device->bdev, |
|
&zinfo->sb_zones[BTRFS_NR_SB_LOG_ZONES * mirror], |
|
rw, bytenr_ret); |
|
} |
|
|
|
static inline bool is_sb_log_zone(struct btrfs_zoned_device_info *zinfo, |
|
int mirror) |
|
{ |
|
u32 zone_num; |
|
|
|
if (!zinfo) |
|
return false; |
|
|
|
zone_num = sb_zone_number(zinfo->zone_size_shift, mirror); |
|
if (zone_num + 1 >= zinfo->nr_zones) |
|
return false; |
|
|
|
if (!test_bit(zone_num, zinfo->seq_zones)) |
|
return false; |
|
|
|
return true; |
|
} |
|
|
|
int btrfs_advance_sb_log(struct btrfs_device *device, int mirror) |
|
{ |
|
struct btrfs_zoned_device_info *zinfo = device->zone_info; |
|
struct blk_zone *zone; |
|
int i; |
|
|
|
if (!is_sb_log_zone(zinfo, mirror)) |
|
return 0; |
|
|
|
zone = &zinfo->sb_zones[BTRFS_NR_SB_LOG_ZONES * mirror]; |
|
for (i = 0; i < BTRFS_NR_SB_LOG_ZONES; i++) { |
|
/* Advance the next zone */ |
|
if (zone->cond == BLK_ZONE_COND_FULL) { |
|
zone++; |
|
continue; |
|
} |
|
|
|
if (zone->cond == BLK_ZONE_COND_EMPTY) |
|
zone->cond = BLK_ZONE_COND_IMP_OPEN; |
|
|
|
zone->wp += SUPER_INFO_SECTORS; |
|
|
|
if (sb_zone_is_full(zone)) { |
|
/* |
|
* No room left to write new superblock. Since |
|
* superblock is written with REQ_SYNC, it is safe to |
|
* finish the zone now. |
|
* |
|
* If the write pointer is exactly at the capacity, |
|
* explicit ZONE_FINISH is not necessary. |
|
*/ |
|
if (zone->wp != zone->start + zone->capacity) { |
|
int ret; |
|
|
|
ret = blkdev_zone_mgmt(device->bdev, |
|
REQ_OP_ZONE_FINISH, zone->start, |
|
zone->len, GFP_NOFS); |
|
if (ret) |
|
return ret; |
|
} |
|
|
|
zone->wp = zone->start + zone->len; |
|
zone->cond = BLK_ZONE_COND_FULL; |
|
} |
|
return 0; |
|
} |
|
|
|
/* All the zones are FULL. Should not reach here. */ |
|
ASSERT(0); |
|
return -EIO; |
|
} |
|
|
|
int btrfs_reset_sb_log_zones(struct block_device *bdev, int mirror) |
|
{ |
|
sector_t zone_sectors; |
|
sector_t nr_sectors; |
|
u8 zone_sectors_shift; |
|
u32 sb_zone; |
|
u32 nr_zones; |
|
|
|
zone_sectors = bdev_zone_sectors(bdev); |
|
zone_sectors_shift = ilog2(zone_sectors); |
|
nr_sectors = bdev_nr_sectors(bdev); |
|
nr_zones = nr_sectors >> zone_sectors_shift; |
|
|
|
sb_zone = sb_zone_number(zone_sectors_shift + SECTOR_SHIFT, mirror); |
|
if (sb_zone + 1 >= nr_zones) |
|
return -ENOENT; |
|
|
|
return blkdev_zone_mgmt(bdev, REQ_OP_ZONE_RESET, |
|
zone_start_sector(sb_zone, bdev), |
|
zone_sectors * BTRFS_NR_SB_LOG_ZONES, GFP_NOFS); |
|
} |
|
|
|
/** |
|
* btrfs_find_allocatable_zones - find allocatable zones within a given region |
|
* |
|
* @device: the device to allocate a region on |
|
* @hole_start: the position of the hole to allocate the region |
|
* @num_bytes: size of wanted region |
|
* @hole_end: the end of the hole |
|
* @return: position of allocatable zones |
|
* |
|
* Allocatable region should not contain any superblock locations. |
|
*/ |
|
u64 btrfs_find_allocatable_zones(struct btrfs_device *device, u64 hole_start, |
|
u64 hole_end, u64 num_bytes) |
|
{ |
|
struct btrfs_zoned_device_info *zinfo = device->zone_info; |
|
const u8 shift = zinfo->zone_size_shift; |
|
u64 nzones = num_bytes >> shift; |
|
u64 pos = hole_start; |
|
u64 begin, end; |
|
bool have_sb; |
|
int i; |
|
|
|
ASSERT(IS_ALIGNED(hole_start, zinfo->zone_size)); |
|
ASSERT(IS_ALIGNED(num_bytes, zinfo->zone_size)); |
|
|
|
while (pos < hole_end) { |
|
begin = pos >> shift; |
|
end = begin + nzones; |
|
|
|
if (end > zinfo->nr_zones) |
|
return hole_end; |
|
|
|
/* Check if zones in the region are all empty */ |
|
if (btrfs_dev_is_sequential(device, pos) && |
|
find_next_zero_bit(zinfo->empty_zones, end, begin) != end) { |
|
pos += zinfo->zone_size; |
|
continue; |
|
} |
|
|
|
have_sb = false; |
|
for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) { |
|
u32 sb_zone; |
|
u64 sb_pos; |
|
|
|
sb_zone = sb_zone_number(shift, i); |
|
if (!(end <= sb_zone || |
|
sb_zone + BTRFS_NR_SB_LOG_ZONES <= begin)) { |
|
have_sb = true; |
|
pos = zone_start_physical( |
|
sb_zone + BTRFS_NR_SB_LOG_ZONES, zinfo); |
|
break; |
|
} |
|
|
|
/* We also need to exclude regular superblock positions */ |
|
sb_pos = btrfs_sb_offset(i); |
|
if (!(pos + num_bytes <= sb_pos || |
|
sb_pos + BTRFS_SUPER_INFO_SIZE <= pos)) { |
|
have_sb = true; |
|
pos = ALIGN(sb_pos + BTRFS_SUPER_INFO_SIZE, |
|
zinfo->zone_size); |
|
break; |
|
} |
|
} |
|
if (!have_sb) |
|
break; |
|
} |
|
|
|
return pos; |
|
} |
|
|
|
static bool btrfs_dev_set_active_zone(struct btrfs_device *device, u64 pos) |
|
{ |
|
struct btrfs_zoned_device_info *zone_info = device->zone_info; |
|
unsigned int zno = (pos >> zone_info->zone_size_shift); |
|
|
|
/* We can use any number of zones */ |
|
if (zone_info->max_active_zones == 0) |
|
return true; |
|
|
|
if (!test_bit(zno, zone_info->active_zones)) { |
|
/* Active zone left? */ |
|
if (atomic_dec_if_positive(&zone_info->active_zones_left) < 0) |
|
return false; |
|
if (test_and_set_bit(zno, zone_info->active_zones)) { |
|
/* Someone already set the bit */ |
|
atomic_inc(&zone_info->active_zones_left); |
|
} |
|
} |
|
|
|
return true; |
|
} |
|
|
|
static void btrfs_dev_clear_active_zone(struct btrfs_device *device, u64 pos) |
|
{ |
|
struct btrfs_zoned_device_info *zone_info = device->zone_info; |
|
unsigned int zno = (pos >> zone_info->zone_size_shift); |
|
|
|
/* We can use any number of zones */ |
|
if (zone_info->max_active_zones == 0) |
|
return; |
|
|
|
if (test_and_clear_bit(zno, zone_info->active_zones)) |
|
atomic_inc(&zone_info->active_zones_left); |
|
} |
|
|
|
int btrfs_reset_device_zone(struct btrfs_device *device, u64 physical, |
|
u64 length, u64 *bytes) |
|
{ |
|
int ret; |
|
|
|
*bytes = 0; |
|
ret = blkdev_zone_mgmt(device->bdev, REQ_OP_ZONE_RESET, |
|
physical >> SECTOR_SHIFT, length >> SECTOR_SHIFT, |
|
GFP_NOFS); |
|
if (ret) |
|
return ret; |
|
|
|
*bytes = length; |
|
while (length) { |
|
btrfs_dev_set_zone_empty(device, physical); |
|
btrfs_dev_clear_active_zone(device, physical); |
|
physical += device->zone_info->zone_size; |
|
length -= device->zone_info->zone_size; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
int btrfs_ensure_empty_zones(struct btrfs_device *device, u64 start, u64 size) |
|
{ |
|
struct btrfs_zoned_device_info *zinfo = device->zone_info; |
|
const u8 shift = zinfo->zone_size_shift; |
|
unsigned long begin = start >> shift; |
|
unsigned long end = (start + size) >> shift; |
|
u64 pos; |
|
int ret; |
|
|
|
ASSERT(IS_ALIGNED(start, zinfo->zone_size)); |
|
ASSERT(IS_ALIGNED(size, zinfo->zone_size)); |
|
|
|
if (end > zinfo->nr_zones) |
|
return -ERANGE; |
|
|
|
/* All the zones are conventional */ |
|
if (find_next_bit(zinfo->seq_zones, begin, end) == end) |
|
return 0; |
|
|
|
/* All the zones are sequential and empty */ |
|
if (find_next_zero_bit(zinfo->seq_zones, begin, end) == end && |
|
find_next_zero_bit(zinfo->empty_zones, begin, end) == end) |
|
return 0; |
|
|
|
for (pos = start; pos < start + size; pos += zinfo->zone_size) { |
|
u64 reset_bytes; |
|
|
|
if (!btrfs_dev_is_sequential(device, pos) || |
|
btrfs_dev_is_empty_zone(device, pos)) |
|
continue; |
|
|
|
/* Free regions should be empty */ |
|
btrfs_warn_in_rcu( |
|
device->fs_info, |
|
"zoned: resetting device %s (devid %llu) zone %llu for allocation", |
|
rcu_str_deref(device->name), device->devid, pos >> shift); |
|
WARN_ON_ONCE(1); |
|
|
|
ret = btrfs_reset_device_zone(device, pos, zinfo->zone_size, |
|
&reset_bytes); |
|
if (ret) |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Calculate an allocation pointer from the extent allocation information |
|
* for a block group consist of conventional zones. It is pointed to the |
|
* end of the highest addressed extent in the block group as an allocation |
|
* offset. |
|
*/ |
|
static int calculate_alloc_pointer(struct btrfs_block_group *cache, |
|
u64 *offset_ret) |
|
{ |
|
struct btrfs_fs_info *fs_info = cache->fs_info; |
|
struct btrfs_root *root; |
|
struct btrfs_path *path; |
|
struct btrfs_key key; |
|
struct btrfs_key found_key; |
|
int ret; |
|
u64 length; |
|
|
|
path = btrfs_alloc_path(); |
|
if (!path) |
|
return -ENOMEM; |
|
|
|
key.objectid = cache->start + cache->length; |
|
key.type = 0; |
|
key.offset = 0; |
|
|
|
root = btrfs_extent_root(fs_info, key.objectid); |
|
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); |
|
/* We should not find the exact match */ |
|
if (!ret) |
|
ret = -EUCLEAN; |
|
if (ret < 0) |
|
goto out; |
|
|
|
ret = btrfs_previous_extent_item(root, path, cache->start); |
|
if (ret) { |
|
if (ret == 1) { |
|
ret = 0; |
|
*offset_ret = 0; |
|
} |
|
goto out; |
|
} |
|
|
|
btrfs_item_key_to_cpu(path->nodes[0], &found_key, path->slots[0]); |
|
|
|
if (found_key.type == BTRFS_EXTENT_ITEM_KEY) |
|
length = found_key.offset; |
|
else |
|
length = fs_info->nodesize; |
|
|
|
if (!(found_key.objectid >= cache->start && |
|
found_key.objectid + length <= cache->start + cache->length)) { |
|
ret = -EUCLEAN; |
|
goto out; |
|
} |
|
*offset_ret = found_key.objectid + length - cache->start; |
|
ret = 0; |
|
|
|
out: |
|
btrfs_free_path(path); |
|
return ret; |
|
} |
|
|
|
int btrfs_load_block_group_zone_info(struct btrfs_block_group *cache, bool new) |
|
{ |
|
struct btrfs_fs_info *fs_info = cache->fs_info; |
|
struct extent_map_tree *em_tree = &fs_info->mapping_tree; |
|
struct extent_map *em; |
|
struct map_lookup *map; |
|
struct btrfs_device *device; |
|
u64 logical = cache->start; |
|
u64 length = cache->length; |
|
u64 physical = 0; |
|
int ret; |
|
int i; |
|
unsigned int nofs_flag; |
|
u64 *alloc_offsets = NULL; |
|
u64 *caps = NULL; |
|
unsigned long *active = NULL; |
|
u64 last_alloc = 0; |
|
u32 num_sequential = 0, num_conventional = 0; |
|
|
|
if (!btrfs_is_zoned(fs_info)) |
|
return 0; |
|
|
|
/* Sanity check */ |
|
if (!IS_ALIGNED(length, fs_info->zone_size)) { |
|
btrfs_err(fs_info, |
|
"zoned: block group %llu len %llu unaligned to zone size %llu", |
|
logical, length, fs_info->zone_size); |
|
return -EIO; |
|
} |
|
|
|
/* Get the chunk mapping */ |
|
read_lock(&em_tree->lock); |
|
em = lookup_extent_mapping(em_tree, logical, length); |
|
read_unlock(&em_tree->lock); |
|
|
|
if (!em) |
|
return -EINVAL; |
|
|
|
map = em->map_lookup; |
|
|
|
cache->physical_map = kmemdup(map, map_lookup_size(map->num_stripes), GFP_NOFS); |
|
if (!cache->physical_map) { |
|
ret = -ENOMEM; |
|
goto out; |
|
} |
|
|
|
alloc_offsets = kcalloc(map->num_stripes, sizeof(*alloc_offsets), GFP_NOFS); |
|
if (!alloc_offsets) { |
|
ret = -ENOMEM; |
|
goto out; |
|
} |
|
|
|
caps = kcalloc(map->num_stripes, sizeof(*caps), GFP_NOFS); |
|
if (!caps) { |
|
ret = -ENOMEM; |
|
goto out; |
|
} |
|
|
|
active = bitmap_zalloc(map->num_stripes, GFP_NOFS); |
|
if (!active) { |
|
ret = -ENOMEM; |
|
goto out; |
|
} |
|
|
|
for (i = 0; i < map->num_stripes; i++) { |
|
bool is_sequential; |
|
struct blk_zone zone; |
|
struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace; |
|
int dev_replace_is_ongoing = 0; |
|
|
|
device = map->stripes[i].dev; |
|
physical = map->stripes[i].physical; |
|
|
|
if (device->bdev == NULL) { |
|
alloc_offsets[i] = WP_MISSING_DEV; |
|
continue; |
|
} |
|
|
|
is_sequential = btrfs_dev_is_sequential(device, physical); |
|
if (is_sequential) |
|
num_sequential++; |
|
else |
|
num_conventional++; |
|
|
|
if (!is_sequential) { |
|
alloc_offsets[i] = WP_CONVENTIONAL; |
|
continue; |
|
} |
|
|
|
/* |
|
* This zone will be used for allocation, so mark this zone |
|
* non-empty. |
|
*/ |
|
btrfs_dev_clear_zone_empty(device, physical); |
|
|
|
down_read(&dev_replace->rwsem); |
|
dev_replace_is_ongoing = btrfs_dev_replace_is_ongoing(dev_replace); |
|
if (dev_replace_is_ongoing && dev_replace->tgtdev != NULL) |
|
btrfs_dev_clear_zone_empty(dev_replace->tgtdev, physical); |
|
up_read(&dev_replace->rwsem); |
|
|
|
/* |
|
* The group is mapped to a sequential zone. Get the zone write |
|
* pointer to determine the allocation offset within the zone. |
|
*/ |
|
WARN_ON(!IS_ALIGNED(physical, fs_info->zone_size)); |
|
nofs_flag = memalloc_nofs_save(); |
|
ret = btrfs_get_dev_zone(device, physical, &zone); |
|
memalloc_nofs_restore(nofs_flag); |
|
if (ret == -EIO || ret == -EOPNOTSUPP) { |
|
ret = 0; |
|
alloc_offsets[i] = WP_MISSING_DEV; |
|
continue; |
|
} else if (ret) { |
|
goto out; |
|
} |
|
|
|
if (zone.type == BLK_ZONE_TYPE_CONVENTIONAL) { |
|
btrfs_err_in_rcu(fs_info, |
|
"zoned: unexpected conventional zone %llu on device %s (devid %llu)", |
|
zone.start << SECTOR_SHIFT, |
|
rcu_str_deref(device->name), device->devid); |
|
ret = -EIO; |
|
goto out; |
|
} |
|
|
|
caps[i] = (zone.capacity << SECTOR_SHIFT); |
|
|
|
switch (zone.cond) { |
|
case BLK_ZONE_COND_OFFLINE: |
|
case BLK_ZONE_COND_READONLY: |
|
btrfs_err(fs_info, |
|
"zoned: offline/readonly zone %llu on device %s (devid %llu)", |
|
physical >> device->zone_info->zone_size_shift, |
|
rcu_str_deref(device->name), device->devid); |
|
alloc_offsets[i] = WP_MISSING_DEV; |
|
break; |
|
case BLK_ZONE_COND_EMPTY: |
|
alloc_offsets[i] = 0; |
|
break; |
|
case BLK_ZONE_COND_FULL: |
|
alloc_offsets[i] = caps[i]; |
|
break; |
|
default: |
|
/* Partially used zone */ |
|
alloc_offsets[i] = |
|
((zone.wp - zone.start) << SECTOR_SHIFT); |
|
__set_bit(i, active); |
|
break; |
|
} |
|
|
|
/* |
|
* Consider a zone as active if we can allow any number of |
|
* active zones. |
|
*/ |
|
if (!device->zone_info->max_active_zones) |
|
__set_bit(i, active); |
|
} |
|
|
|
if (num_sequential > 0) |
|
cache->seq_zone = true; |
|
|
|
if (num_conventional > 0) { |
|
/* |
|
* Avoid calling calculate_alloc_pointer() for new BG. It |
|
* is no use for new BG. It must be always 0. |
|
* |
|
* Also, we have a lock chain of extent buffer lock -> |
|
* chunk mutex. For new BG, this function is called from |
|
* btrfs_make_block_group() which is already taking the |
|
* chunk mutex. Thus, we cannot call |
|
* calculate_alloc_pointer() which takes extent buffer |
|
* locks to avoid deadlock. |
|
*/ |
|
|
|
/* Zone capacity is always zone size in emulation */ |
|
cache->zone_capacity = cache->length; |
|
if (new) { |
|
cache->alloc_offset = 0; |
|
goto out; |
|
} |
|
ret = calculate_alloc_pointer(cache, &last_alloc); |
|
if (ret || map->num_stripes == num_conventional) { |
|
if (!ret) |
|
cache->alloc_offset = last_alloc; |
|
else |
|
btrfs_err(fs_info, |
|
"zoned: failed to determine allocation offset of bg %llu", |
|
cache->start); |
|
goto out; |
|
} |
|
} |
|
|
|
switch (map->type & BTRFS_BLOCK_GROUP_PROFILE_MASK) { |
|
case 0: /* single */ |
|
if (alloc_offsets[0] == WP_MISSING_DEV) { |
|
btrfs_err(fs_info, |
|
"zoned: cannot recover write pointer for zone %llu", |
|
physical); |
|
ret = -EIO; |
|
goto out; |
|
} |
|
cache->alloc_offset = alloc_offsets[0]; |
|
cache->zone_capacity = caps[0]; |
|
cache->zone_is_active = test_bit(0, active); |
|
break; |
|
case BTRFS_BLOCK_GROUP_DUP: |
|
case BTRFS_BLOCK_GROUP_RAID1: |
|
case BTRFS_BLOCK_GROUP_RAID0: |
|
case BTRFS_BLOCK_GROUP_RAID10: |
|
case BTRFS_BLOCK_GROUP_RAID5: |
|
case BTRFS_BLOCK_GROUP_RAID6: |
|
/* non-single profiles are not supported yet */ |
|
default: |
|
btrfs_err(fs_info, "zoned: profile %s not yet supported", |
|
btrfs_bg_type_to_raid_name(map->type)); |
|
ret = -EINVAL; |
|
goto out; |
|
} |
|
|
|
if (cache->zone_is_active) { |
|
btrfs_get_block_group(cache); |
|
spin_lock(&fs_info->zone_active_bgs_lock); |
|
list_add_tail(&cache->active_bg_list, &fs_info->zone_active_bgs); |
|
spin_unlock(&fs_info->zone_active_bgs_lock); |
|
} |
|
|
|
out: |
|
if (cache->alloc_offset > fs_info->zone_size) { |
|
btrfs_err(fs_info, |
|
"zoned: invalid write pointer %llu in block group %llu", |
|
cache->alloc_offset, cache->start); |
|
ret = -EIO; |
|
} |
|
|
|
if (cache->alloc_offset > cache->zone_capacity) { |
|
btrfs_err(fs_info, |
|
"zoned: invalid write pointer %llu (larger than zone capacity %llu) in block group %llu", |
|
cache->alloc_offset, cache->zone_capacity, |
|
cache->start); |
|
ret = -EIO; |
|
} |
|
|
|
/* An extent is allocated after the write pointer */ |
|
if (!ret && num_conventional && last_alloc > cache->alloc_offset) { |
|
btrfs_err(fs_info, |
|
"zoned: got wrong write pointer in BG %llu: %llu > %llu", |
|
logical, last_alloc, cache->alloc_offset); |
|
ret = -EIO; |
|
} |
|
|
|
if (!ret) |
|
cache->meta_write_pointer = cache->alloc_offset + cache->start; |
|
|
|
if (ret) { |
|
kfree(cache->physical_map); |
|
cache->physical_map = NULL; |
|
} |
|
bitmap_free(active); |
|
kfree(caps); |
|
kfree(alloc_offsets); |
|
free_extent_map(em); |
|
|
|
return ret; |
|
} |
|
|
|
void btrfs_calc_zone_unusable(struct btrfs_block_group *cache) |
|
{ |
|
u64 unusable, free; |
|
|
|
if (!btrfs_is_zoned(cache->fs_info)) |
|
return; |
|
|
|
WARN_ON(cache->bytes_super != 0); |
|
unusable = (cache->alloc_offset - cache->used) + |
|
(cache->length - cache->zone_capacity); |
|
free = cache->zone_capacity - cache->alloc_offset; |
|
|
|
/* We only need ->free_space in ALLOC_SEQ block groups */ |
|
cache->last_byte_to_unpin = (u64)-1; |
|
cache->cached = BTRFS_CACHE_FINISHED; |
|
cache->free_space_ctl->free_space = free; |
|
cache->zone_unusable = unusable; |
|
} |
|
|
|
void btrfs_redirty_list_add(struct btrfs_transaction *trans, |
|
struct extent_buffer *eb) |
|
{ |
|
struct btrfs_fs_info *fs_info = eb->fs_info; |
|
|
|
if (!btrfs_is_zoned(fs_info) || |
|
btrfs_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN) || |
|
!list_empty(&eb->release_list)) |
|
return; |
|
|
|
set_extent_buffer_dirty(eb); |
|
set_extent_bits_nowait(&trans->dirty_pages, eb->start, |
|
eb->start + eb->len - 1, EXTENT_DIRTY); |
|
memzero_extent_buffer(eb, 0, eb->len); |
|
set_bit(EXTENT_BUFFER_NO_CHECK, &eb->bflags); |
|
|
|
spin_lock(&trans->releasing_ebs_lock); |
|
list_add_tail(&eb->release_list, &trans->releasing_ebs); |
|
spin_unlock(&trans->releasing_ebs_lock); |
|
atomic_inc(&eb->refs); |
|
} |
|
|
|
void btrfs_free_redirty_list(struct btrfs_transaction *trans) |
|
{ |
|
spin_lock(&trans->releasing_ebs_lock); |
|
while (!list_empty(&trans->releasing_ebs)) { |
|
struct extent_buffer *eb; |
|
|
|
eb = list_first_entry(&trans->releasing_ebs, |
|
struct extent_buffer, release_list); |
|
list_del_init(&eb->release_list); |
|
free_extent_buffer(eb); |
|
} |
|
spin_unlock(&trans->releasing_ebs_lock); |
|
} |
|
|
|
bool btrfs_use_zone_append(struct btrfs_inode *inode, u64 start) |
|
{ |
|
struct btrfs_fs_info *fs_info = inode->root->fs_info; |
|
struct btrfs_block_group *cache; |
|
bool ret = false; |
|
|
|
if (!btrfs_is_zoned(fs_info)) |
|
return false; |
|
|
|
if (!is_data_inode(&inode->vfs_inode)) |
|
return false; |
|
|
|
/* |
|
* Using REQ_OP_ZONE_APPNED for relocation can break assumptions on the |
|
* extent layout the relocation code has. |
|
* Furthermore we have set aside own block-group from which only the |
|
* relocation "process" can allocate and make sure only one process at a |
|
* time can add pages to an extent that gets relocated, so it's safe to |
|
* use regular REQ_OP_WRITE for this special case. |
|
*/ |
|
if (btrfs_is_data_reloc_root(inode->root)) |
|
return false; |
|
|
|
cache = btrfs_lookup_block_group(fs_info, start); |
|
ASSERT(cache); |
|
if (!cache) |
|
return false; |
|
|
|
ret = cache->seq_zone; |
|
btrfs_put_block_group(cache); |
|
|
|
return ret; |
|
} |
|
|
|
void btrfs_record_physical_zoned(struct inode *inode, u64 file_offset, |
|
struct bio *bio) |
|
{ |
|
struct btrfs_ordered_extent *ordered; |
|
const u64 physical = bio->bi_iter.bi_sector << SECTOR_SHIFT; |
|
|
|
if (bio_op(bio) != REQ_OP_ZONE_APPEND) |
|
return; |
|
|
|
ordered = btrfs_lookup_ordered_extent(BTRFS_I(inode), file_offset); |
|
if (WARN_ON(!ordered)) |
|
return; |
|
|
|
ordered->physical = physical; |
|
ordered->bdev = bio->bi_bdev; |
|
|
|
btrfs_put_ordered_extent(ordered); |
|
} |
|
|
|
void btrfs_rewrite_logical_zoned(struct btrfs_ordered_extent *ordered) |
|
{ |
|
struct btrfs_inode *inode = BTRFS_I(ordered->inode); |
|
struct btrfs_fs_info *fs_info = inode->root->fs_info; |
|
struct extent_map_tree *em_tree; |
|
struct extent_map *em; |
|
struct btrfs_ordered_sum *sum; |
|
u64 orig_logical = ordered->disk_bytenr; |
|
u64 *logical = NULL; |
|
int nr, stripe_len; |
|
|
|
/* Zoned devices should not have partitions. So, we can assume it is 0 */ |
|
ASSERT(!bdev_is_partition(ordered->bdev)); |
|
if (WARN_ON(!ordered->bdev)) |
|
return; |
|
|
|
if (WARN_ON(btrfs_rmap_block(fs_info, orig_logical, ordered->bdev, |
|
ordered->physical, &logical, &nr, |
|
&stripe_len))) |
|
goto out; |
|
|
|
WARN_ON(nr != 1); |
|
|
|
if (orig_logical == *logical) |
|
goto out; |
|
|
|
ordered->disk_bytenr = *logical; |
|
|
|
em_tree = &inode->extent_tree; |
|
write_lock(&em_tree->lock); |
|
em = search_extent_mapping(em_tree, ordered->file_offset, |
|
ordered->num_bytes); |
|
em->block_start = *logical; |
|
free_extent_map(em); |
|
write_unlock(&em_tree->lock); |
|
|
|
list_for_each_entry(sum, &ordered->list, list) { |
|
if (*logical < orig_logical) |
|
sum->bytenr -= orig_logical - *logical; |
|
else |
|
sum->bytenr += *logical - orig_logical; |
|
} |
|
|
|
out: |
|
kfree(logical); |
|
} |
|
|
|
bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info, |
|
struct extent_buffer *eb, |
|
struct btrfs_block_group **cache_ret) |
|
{ |
|
struct btrfs_block_group *cache; |
|
bool ret = true; |
|
|
|
if (!btrfs_is_zoned(fs_info)) |
|
return true; |
|
|
|
cache = btrfs_lookup_block_group(fs_info, eb->start); |
|
if (!cache) |
|
return true; |
|
|
|
if (cache->meta_write_pointer != eb->start) { |
|
btrfs_put_block_group(cache); |
|
cache = NULL; |
|
ret = false; |
|
} else { |
|
cache->meta_write_pointer = eb->start + eb->len; |
|
} |
|
|
|
*cache_ret = cache; |
|
|
|
return ret; |
|
} |
|
|
|
void btrfs_revert_meta_write_pointer(struct btrfs_block_group *cache, |
|
struct extent_buffer *eb) |
|
{ |
|
if (!btrfs_is_zoned(eb->fs_info) || !cache) |
|
return; |
|
|
|
ASSERT(cache->meta_write_pointer == eb->start + eb->len); |
|
cache->meta_write_pointer = eb->start; |
|
} |
|
|
|
int btrfs_zoned_issue_zeroout(struct btrfs_device *device, u64 physical, u64 length) |
|
{ |
|
if (!btrfs_dev_is_sequential(device, physical)) |
|
return -EOPNOTSUPP; |
|
|
|
return blkdev_issue_zeroout(device->bdev, physical >> SECTOR_SHIFT, |
|
length >> SECTOR_SHIFT, GFP_NOFS, 0); |
|
} |
|
|
|
static int read_zone_info(struct btrfs_fs_info *fs_info, u64 logical, |
|
struct blk_zone *zone) |
|
{ |
|
struct btrfs_io_context *bioc = NULL; |
|
u64 mapped_length = PAGE_SIZE; |
|
unsigned int nofs_flag; |
|
int nmirrors; |
|
int i, ret; |
|
|
|
ret = btrfs_map_sblock(fs_info, BTRFS_MAP_GET_READ_MIRRORS, logical, |
|
&mapped_length, &bioc); |
|
if (ret || !bioc || mapped_length < PAGE_SIZE) { |
|
btrfs_put_bioc(bioc); |
|
return -EIO; |
|
} |
|
|
|
if (bioc->map_type & BTRFS_BLOCK_GROUP_RAID56_MASK) |
|
return -EINVAL; |
|
|
|
nofs_flag = memalloc_nofs_save(); |
|
nmirrors = (int)bioc->num_stripes; |
|
for (i = 0; i < nmirrors; i++) { |
|
u64 physical = bioc->stripes[i].physical; |
|
struct btrfs_device *dev = bioc->stripes[i].dev; |
|
|
|
/* Missing device */ |
|
if (!dev->bdev) |
|
continue; |
|
|
|
ret = btrfs_get_dev_zone(dev, physical, zone); |
|
/* Failing device */ |
|
if (ret == -EIO || ret == -EOPNOTSUPP) |
|
continue; |
|
break; |
|
} |
|
memalloc_nofs_restore(nofs_flag); |
|
|
|
return ret; |
|
} |
|
|
|
/* |
|
* Synchronize write pointer in a zone at @physical_start on @tgt_dev, by |
|
* filling zeros between @physical_pos to a write pointer of dev-replace |
|
* source device. |
|
*/ |
|
int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, u64 logical, |
|
u64 physical_start, u64 physical_pos) |
|
{ |
|
struct btrfs_fs_info *fs_info = tgt_dev->fs_info; |
|
struct blk_zone zone; |
|
u64 length; |
|
u64 wp; |
|
int ret; |
|
|
|
if (!btrfs_dev_is_sequential(tgt_dev, physical_pos)) |
|
return 0; |
|
|
|
ret = read_zone_info(fs_info, logical, &zone); |
|
if (ret) |
|
return ret; |
|
|
|
wp = physical_start + ((zone.wp - zone.start) << SECTOR_SHIFT); |
|
|
|
if (physical_pos == wp) |
|
return 0; |
|
|
|
if (physical_pos > wp) |
|
return -EUCLEAN; |
|
|
|
length = wp - physical_pos; |
|
return btrfs_zoned_issue_zeroout(tgt_dev, physical_pos, length); |
|
} |
|
|
|
struct btrfs_device *btrfs_zoned_get_device(struct btrfs_fs_info *fs_info, |
|
u64 logical, u64 length) |
|
{ |
|
struct btrfs_device *device; |
|
struct extent_map *em; |
|
struct map_lookup *map; |
|
|
|
em = btrfs_get_chunk_map(fs_info, logical, length); |
|
if (IS_ERR(em)) |
|
return ERR_CAST(em); |
|
|
|
map = em->map_lookup; |
|
/* We only support single profile for now */ |
|
ASSERT(map->num_stripes == 1); |
|
device = map->stripes[0].dev; |
|
|
|
free_extent_map(em); |
|
|
|
return device; |
|
} |
|
|
|
/** |
|
* Activate block group and underlying device zones |
|
* |
|
* @block_group: the block group to activate |
|
* |
|
* Return: true on success, false otherwise |
|
*/ |
|
bool btrfs_zone_activate(struct btrfs_block_group *block_group) |
|
{ |
|
struct btrfs_fs_info *fs_info = block_group->fs_info; |
|
struct map_lookup *map; |
|
struct btrfs_device *device; |
|
u64 physical; |
|
bool ret; |
|
|
|
if (!btrfs_is_zoned(block_group->fs_info)) |
|
return true; |
|
|
|
map = block_group->physical_map; |
|
/* Currently support SINGLE profile only */ |
|
ASSERT(map->num_stripes == 1); |
|
device = map->stripes[0].dev; |
|
physical = map->stripes[0].physical; |
|
|
|
if (device->zone_info->max_active_zones == 0) |
|
return true; |
|
|
|
spin_lock(&block_group->lock); |
|
|
|
if (block_group->zone_is_active) { |
|
ret = true; |
|
goto out_unlock; |
|
} |
|
|
|
/* No space left */ |
|
if (block_group->alloc_offset == block_group->zone_capacity) { |
|
ret = false; |
|
goto out_unlock; |
|
} |
|
|
|
if (!btrfs_dev_set_active_zone(device, physical)) { |
|
/* Cannot activate the zone */ |
|
ret = false; |
|
goto out_unlock; |
|
} |
|
|
|
/* Successfully activated all the zones */ |
|
block_group->zone_is_active = 1; |
|
|
|
spin_unlock(&block_group->lock); |
|
|
|
/* For the active block group list */ |
|
btrfs_get_block_group(block_group); |
|
|
|
spin_lock(&fs_info->zone_active_bgs_lock); |
|
ASSERT(list_empty(&block_group->active_bg_list)); |
|
list_add_tail(&block_group->active_bg_list, &fs_info->zone_active_bgs); |
|
spin_unlock(&fs_info->zone_active_bgs_lock); |
|
|
|
return true; |
|
|
|
out_unlock: |
|
spin_unlock(&block_group->lock); |
|
return ret; |
|
} |
|
|
|
int btrfs_zone_finish(struct btrfs_block_group *block_group) |
|
{ |
|
struct btrfs_fs_info *fs_info = block_group->fs_info; |
|
struct map_lookup *map; |
|
struct btrfs_device *device; |
|
u64 physical; |
|
int ret = 0; |
|
|
|
if (!btrfs_is_zoned(fs_info)) |
|
return 0; |
|
|
|
map = block_group->physical_map; |
|
/* Currently support SINGLE profile only */ |
|
ASSERT(map->num_stripes == 1); |
|
|
|
device = map->stripes[0].dev; |
|
physical = map->stripes[0].physical; |
|
|
|
if (device->zone_info->max_active_zones == 0) |
|
return 0; |
|
|
|
spin_lock(&block_group->lock); |
|
if (!block_group->zone_is_active) { |
|
spin_unlock(&block_group->lock); |
|
return 0; |
|
} |
|
|
|
/* Check if we have unwritten allocated space */ |
|
if ((block_group->flags & |
|
(BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_SYSTEM)) && |
|
block_group->alloc_offset > block_group->meta_write_pointer) { |
|
spin_unlock(&block_group->lock); |
|
return -EAGAIN; |
|
} |
|
spin_unlock(&block_group->lock); |
|
|
|
ret = btrfs_inc_block_group_ro(block_group, false); |
|
if (ret) |
|
return ret; |
|
|
|
/* Ensure all writes in this block group finish */ |
|
btrfs_wait_block_group_reservations(block_group); |
|
/* No need to wait for NOCOW writers. Zoned mode does not allow that. */ |
|
btrfs_wait_ordered_roots(fs_info, U64_MAX, block_group->start, |
|
block_group->length); |
|
|
|
spin_lock(&block_group->lock); |
|
|
|
/* |
|
* Bail out if someone already deactivated the block group, or |
|
* allocated space is left in the block group. |
|
*/ |
|
if (!block_group->zone_is_active) { |
|
spin_unlock(&block_group->lock); |
|
btrfs_dec_block_group_ro(block_group); |
|
return 0; |
|
} |
|
|
|
if (block_group->reserved) { |
|
spin_unlock(&block_group->lock); |
|
btrfs_dec_block_group_ro(block_group); |
|
return -EAGAIN; |
|
} |
|
|
|
block_group->zone_is_active = 0; |
|
block_group->alloc_offset = block_group->zone_capacity; |
|
block_group->free_space_ctl->free_space = 0; |
|
btrfs_clear_treelog_bg(block_group); |
|
btrfs_clear_data_reloc_bg(block_group); |
|
spin_unlock(&block_group->lock); |
|
|
|
ret = blkdev_zone_mgmt(device->bdev, REQ_OP_ZONE_FINISH, |
|
physical >> SECTOR_SHIFT, |
|
device->zone_info->zone_size >> SECTOR_SHIFT, |
|
GFP_NOFS); |
|
btrfs_dec_block_group_ro(block_group); |
|
|
|
if (!ret) { |
|
btrfs_dev_clear_active_zone(device, physical); |
|
|
|
spin_lock(&fs_info->zone_active_bgs_lock); |
|
ASSERT(!list_empty(&block_group->active_bg_list)); |
|
list_del_init(&block_group->active_bg_list); |
|
spin_unlock(&fs_info->zone_active_bgs_lock); |
|
|
|
/* For active_bg_list */ |
|
btrfs_put_block_group(block_group); |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, u64 flags) |
|
{ |
|
struct btrfs_device *device; |
|
bool ret = false; |
|
|
|
if (!btrfs_is_zoned(fs_devices->fs_info)) |
|
return true; |
|
|
|
/* Non-single profiles are not supported yet */ |
|
ASSERT((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0); |
|
|
|
/* Check if there is a device with active zones left */ |
|
mutex_lock(&fs_devices->device_list_mutex); |
|
list_for_each_entry(device, &fs_devices->devices, dev_list) { |
|
struct btrfs_zoned_device_info *zinfo = device->zone_info; |
|
|
|
if (!device->bdev) |
|
continue; |
|
|
|
if (!zinfo->max_active_zones || |
|
atomic_read(&zinfo->active_zones_left)) { |
|
ret = true; |
|
break; |
|
} |
|
} |
|
mutex_unlock(&fs_devices->device_list_mutex); |
|
|
|
return ret; |
|
} |
|
|
|
void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical, u64 length) |
|
{ |
|
struct btrfs_block_group *block_group; |
|
struct map_lookup *map; |
|
struct btrfs_device *device; |
|
u64 physical; |
|
|
|
if (!btrfs_is_zoned(fs_info)) |
|
return; |
|
|
|
block_group = btrfs_lookup_block_group(fs_info, logical); |
|
ASSERT(block_group); |
|
|
|
if (logical + length < block_group->start + block_group->zone_capacity) |
|
goto out; |
|
|
|
spin_lock(&block_group->lock); |
|
|
|
if (!block_group->zone_is_active) { |
|
spin_unlock(&block_group->lock); |
|
goto out; |
|
} |
|
|
|
block_group->zone_is_active = 0; |
|
/* We should have consumed all the free space */ |
|
ASSERT(block_group->alloc_offset == block_group->zone_capacity); |
|
ASSERT(block_group->free_space_ctl->free_space == 0); |
|
btrfs_clear_treelog_bg(block_group); |
|
btrfs_clear_data_reloc_bg(block_group); |
|
spin_unlock(&block_group->lock); |
|
|
|
map = block_group->physical_map; |
|
device = map->stripes[0].dev; |
|
physical = map->stripes[0].physical; |
|
|
|
if (!device->zone_info->max_active_zones) |
|
goto out; |
|
|
|
btrfs_dev_clear_active_zone(device, physical); |
|
|
|
spin_lock(&fs_info->zone_active_bgs_lock); |
|
ASSERT(!list_empty(&block_group->active_bg_list)); |
|
list_del_init(&block_group->active_bg_list); |
|
spin_unlock(&fs_info->zone_active_bgs_lock); |
|
|
|
btrfs_put_block_group(block_group); |
|
|
|
out: |
|
btrfs_put_block_group(block_group); |
|
} |
|
|
|
void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg) |
|
{ |
|
struct btrfs_fs_info *fs_info = bg->fs_info; |
|
|
|
spin_lock(&fs_info->relocation_bg_lock); |
|
if (fs_info->data_reloc_bg == bg->start) |
|
fs_info->data_reloc_bg = 0; |
|
spin_unlock(&fs_info->relocation_bg_lock); |
|
} |
|
|
|
void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info) |
|
{ |
|
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; |
|
struct btrfs_device *device; |
|
|
|
if (!btrfs_is_zoned(fs_info)) |
|
return; |
|
|
|
mutex_lock(&fs_devices->device_list_mutex); |
|
list_for_each_entry(device, &fs_devices->devices, dev_list) { |
|
if (device->zone_info) { |
|
vfree(device->zone_info->zone_cache); |
|
device->zone_info->zone_cache = NULL; |
|
} |
|
} |
|
mutex_unlock(&fs_devices->device_list_mutex); |
|
}
|
|
|