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https://github.com/edk2-porting/linux-next.git
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d734492a14
We need to use sector_t for zone_sectors, or it would set the zone size
to zero when the size >= 4GB (= 2^24 sectors) by shifting the
zone_sectors value by SECTOR_SHIFT. We're assuming zones sizes up to
8GiB.
Fixes: 5b31646898
("btrfs: get zone information of zoned block devices")
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
1462 lines
36 KiB
C
1462 lines
36 KiB
C
// 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 "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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/* 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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/* Number of superblock log zones */
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#define BTRFS_NR_SB_LOG_ZONES 2
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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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memcpy(&zones[idx], zone, sizeof(*zone));
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return 0;
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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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ASSERT(zones[0].type != BLK_ZONE_TYPE_CONVENTIONAL &&
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zones[1].type != BLK_ZONE_TYPE_CONVENTIONAL);
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empty[0] = (zones[0].cond == BLK_ZONE_COND_EMPTY);
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empty[1] = (zones[1].cond == BLK_ZONE_COND_EMPTY);
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full[0] = (zones[0].cond == BLK_ZONE_COND_FULL);
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full[1] = (zones[1].cond == BLK_ZONE_COND_FULL);
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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 blcoks 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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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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for (i = 0; i < BTRFS_NR_SB_LOG_ZONES; i++) {
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u64 bytenr;
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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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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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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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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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* The following zones are reserved as the circular buffer on ZONED btrfs.
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* - The primary superblock: zones 0 and 1
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* - The first copy: zones 16 and 17
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* - The second copy: zones 1024 or zone at 256GB which is minimum, and
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* the following one
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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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ASSERT(mirror < BTRFS_SUPER_MIRROR_MAX);
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switch (mirror) {
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case 0: return 0;
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case 1: return 16;
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case 2: return min_t(u64, btrfs_sb_offset(mirror) >> shift, 1024);
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}
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return 0;
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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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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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return i;
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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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int ret;
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if (!*nr_zones)
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return 0;
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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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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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return 0;
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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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key.objectid = 1;
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key.type = BTRFS_DEV_EXTENT_KEY;
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key.offset = 0;
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path = btrfs_alloc_path();
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if (!path)
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return -ENOMEM;
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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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if (path->slots[0] >= btrfs_header_nritems(path->nodes[0])) {
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ret = btrfs_next_item(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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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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out:
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btrfs_free_path(path);
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return ret;
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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);
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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)
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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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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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/*
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* Cannot use btrfs_is_zoned here, since fs_info::zone_size might not
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* yet be set.
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*/
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if (!btrfs_fs_incompat(fs_info, ZONED))
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return 0;
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if (device->zone_info)
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return 0;
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zone_info = kzalloc(sizeof(*zone_info), GFP_KERNEL);
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if (!zone_info)
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return -ENOMEM;
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if (!bdev_is_zoned(bdev)) {
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if (!fs_info->zone_size) {
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ret = calculate_emulated_zone_size(fs_info);
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if (ret)
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goto out;
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}
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ASSERT(fs_info->zone_size);
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zone_sectors = fs_info->zone_size >> SECTOR_SHIFT;
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} else {
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zone_sectors = bdev_zone_sectors(bdev);
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}
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nr_sectors = bdev_nr_sectors(bdev);
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/* Check if it's power of 2 (see is_power_of_2) */
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ASSERT(zone_sectors != 0 && (zone_sectors & (zone_sectors - 1)) == 0);
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zone_info->zone_size = zone_sectors << SECTOR_SHIFT;
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zone_info->zone_size_shift = ilog2(zone_info->zone_size);
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zone_info->max_zone_append_size =
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(u64)queue_max_zone_append_sectors(queue) << SECTOR_SHIFT;
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zone_info->nr_zones = nr_sectors >> ilog2(zone_sectors);
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if (!IS_ALIGNED(nr_sectors, zone_sectors))
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zone_info->nr_zones++;
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zone_info->seq_zones = bitmap_zalloc(zone_info->nr_zones, GFP_KERNEL);
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if (!zone_info->seq_zones) {
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ret = -ENOMEM;
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goto out;
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}
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zone_info->empty_zones = bitmap_zalloc(zone_info->nr_zones, GFP_KERNEL);
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if (!zone_info->empty_zones) {
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ret = -ENOMEM;
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goto out;
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}
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zones = kcalloc(BTRFS_REPORT_NR_ZONES, sizeof(struct blk_zone), GFP_KERNEL);
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if (!zones) {
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ret = -ENOMEM;
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goto out;
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}
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/* Get zones type */
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while (sector < nr_sectors) {
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nr_zones = BTRFS_REPORT_NR_ZONES;
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ret = btrfs_get_dev_zones(device, sector << SECTOR_SHIFT, zones,
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&nr_zones);
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if (ret)
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goto out;
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for (i = 0; i < nr_zones; i++) {
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if (zones[i].type == BLK_ZONE_TYPE_SEQWRITE_REQ)
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__set_bit(nreported, zone_info->seq_zones);
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if (zones[i].cond == BLK_ZONE_COND_EMPTY)
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__set_bit(nreported, zone_info->empty_zones);
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nreported++;
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}
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sector = zones[nr_zones - 1].start + zones[nr_zones - 1].len;
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}
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if (nreported != zone_info->nr_zones) {
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btrfs_err_in_rcu(device->fs_info,
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"inconsistent number of zones on %s (%u/%u)",
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rcu_str_deref(device->name), nreported,
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zone_info->nr_zones);
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ret = -EIO;
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goto out;
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}
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/* Validate superblock log */
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nr_zones = BTRFS_NR_SB_LOG_ZONES;
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for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) {
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u32 sb_zone;
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u64 sb_wp;
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int sb_pos = BTRFS_NR_SB_LOG_ZONES * i;
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sb_zone = sb_zone_number(zone_info->zone_size_shift, i);
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if (sb_zone + 1 >= zone_info->nr_zones)
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continue;
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sector = sb_zone << (zone_info->zone_size_shift - SECTOR_SHIFT);
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ret = btrfs_get_dev_zones(device, sector << SECTOR_SHIFT,
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&zone_info->sb_zones[sb_pos],
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&nr_zones);
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if (ret)
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goto out;
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if (nr_zones != BTRFS_NR_SB_LOG_ZONES) {
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btrfs_err_in_rcu(device->fs_info,
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"zoned: failed to read super block log zone info at devid %llu zone %u",
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device->devid, sb_zone);
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ret = -EUCLEAN;
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goto out;
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}
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/*
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* If zones[0] is conventional, always use the beggining of the
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* zone to record superblock. No need to validate in that case.
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*/
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if (zone_info->sb_zones[BTRFS_NR_SB_LOG_ZONES * i].type ==
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BLK_ZONE_TYPE_CONVENTIONAL)
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continue;
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ret = sb_write_pointer(device->bdev,
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&zone_info->sb_zones[sb_pos], &sb_wp);
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if (ret != -ENOENT && ret) {
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btrfs_err_in_rcu(device->fs_info,
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"zoned: super block log zone corrupted devid %llu zone %u",
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device->devid, sb_zone);
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ret = -EUCLEAN;
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goto out;
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}
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}
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kfree(zones);
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device->zone_info = zone_info;
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switch (bdev_zoned_model(bdev)) {
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case BLK_ZONED_HM:
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model = "host-managed zoned";
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emulated = "";
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break;
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case BLK_ZONED_HA:
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model = "host-aware zoned";
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emulated = "";
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break;
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case BLK_ZONED_NONE:
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model = "regular";
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emulated = "emulated ";
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break;
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default:
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/* Just in case */
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btrfs_err_in_rcu(fs_info, "zoned: unsupported model %d on %s",
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bdev_zoned_model(bdev),
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rcu_str_deref(device->name));
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ret = -EOPNOTSUPP;
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goto out_free_zone_info;
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}
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|
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btrfs_info_in_rcu(fs_info,
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"%s block device %s, %u %szones of %llu bytes",
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model, rcu_str_deref(device->name), zone_info->nr_zones,
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emulated, zone_info->zone_size);
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return 0;
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out:
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kfree(zones);
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out_free_zone_info:
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bitmap_free(zone_info->empty_zones);
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bitmap_free(zone_info->seq_zones);
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kfree(zone_info);
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device->zone_info = NULL;
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return ret;
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}
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|
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void btrfs_destroy_dev_zone_info(struct btrfs_device *device)
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{
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struct btrfs_zoned_device_info *zone_info = device->zone_info;
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if (!zone_info)
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return;
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bitmap_free(zone_info->seq_zones);
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bitmap_free(zone_info->empty_zones);
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kfree(zone_info);
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device->zone_info = NULL;
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}
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|
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int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos,
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struct blk_zone *zone)
|
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{
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unsigned int nr_zones = 1;
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int ret;
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|
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ret = btrfs_get_dev_zones(device, pos, zone, &nr_zones);
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if (ret != 0 || !nr_zones)
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return ret ? ret : -EIO;
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|
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return 0;
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}
|
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|
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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;
|
|
u64 max_zone_append_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;
|
|
}
|
|
if (!max_zone_append_size ||
|
|
(zone_info->max_zone_append_size &&
|
|
zone_info->max_zone_append_size < max_zone_append_size))
|
|
max_zone_append_size =
|
|
zone_info->max_zone_append_size;
|
|
}
|
|
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_alloc_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->max_zone_append_size = max_zone_append_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(reset->cond == BLK_ZONE_COND_FULL);
|
|
|
|
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 precious one */
|
|
if (wp == zones[0].start << SECTOR_SHIFT)
|
|
wp = (zones[1].start + zones[1].len) << SECTOR_SHIFT;
|
|
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, sb_zone << zone_sectors_shift,
|
|
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;
|
|
}
|
|
|
|
void btrfs_advance_sb_log(struct btrfs_device *device, int mirror)
|
|
{
|
|
struct btrfs_zoned_device_info *zinfo = device->zone_info;
|
|
struct blk_zone *zone;
|
|
|
|
if (!is_sb_log_zone(zinfo, mirror))
|
|
return;
|
|
|
|
zone = &zinfo->sb_zones[BTRFS_NR_SB_LOG_ZONES * mirror];
|
|
if (zone->cond != BLK_ZONE_COND_FULL) {
|
|
if (zone->cond == BLK_ZONE_COND_EMPTY)
|
|
zone->cond = BLK_ZONE_COND_IMP_OPEN;
|
|
|
|
zone->wp += (BTRFS_SUPER_INFO_SIZE >> SECTOR_SHIFT);
|
|
|
|
if (zone->wp == zone->start + zone->len)
|
|
zone->cond = BLK_ZONE_COND_FULL;
|
|
|
|
return;
|
|
}
|
|
|
|
zone++;
|
|
ASSERT(zone->cond != BLK_ZONE_COND_FULL);
|
|
if (zone->cond == BLK_ZONE_COND_EMPTY)
|
|
zone->cond = BLK_ZONE_COND_IMP_OPEN;
|
|
|
|
zone->wp += (BTRFS_SUPER_INFO_SIZE >> SECTOR_SHIFT);
|
|
|
|
if (zone->wp == zone->start + zone->len)
|
|
zone->cond = BLK_ZONE_COND_FULL;
|
|
}
|
|
|
|
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,
|
|
sb_zone << zone_sectors_shift,
|
|
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 = ((u64)sb_zone + BTRFS_NR_SB_LOG_ZONES) << shift;
|
|
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;
|
|
}
|
|
|
|
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);
|
|
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 = fs_info->extent_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;
|
|
|
|
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 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;
|
|
|
|
alloc_offsets = kcalloc(map->num_stripes, sizeof(*alloc_offsets), GFP_NOFS);
|
|
if (!alloc_offsets) {
|
|
free_extent_map(em);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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] = fs_info->zone_size;
|
|
break;
|
|
default:
|
|
/* Partially used zone */
|
|
alloc_offsets[i] =
|
|
((zone.wp - zone.start) << SECTOR_SHIFT);
|
|
break;
|
|
}
|
|
}
|
|
|
|
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.
|
|
*/
|
|
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 */
|
|
cache->alloc_offset = alloc_offsets[0];
|
|
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;
|
|
}
|
|
|
|
out:
|
|
/* 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;
|
|
|
|
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;
|
|
free = cache->length - 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;
|
|
|
|
/* Should not have any excluded extents. Just in case, though */
|
|
btrfs_free_excluded_extents(cache);
|
|
}
|
|
|
|
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, struct extent_map *em)
|
|
{
|
|
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 (!fs_info->max_zone_append_size)
|
|
return false;
|
|
|
|
if (!is_data_inode(&inode->vfs_inode))
|
|
return false;
|
|
|
|
cache = btrfs_lookup_block_group(fs_info, em->block_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->disk = bio->bi_disk;
|
|
ordered->partno = bio->bi_partno;
|
|
|
|
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;
|
|
struct block_device *bdev;
|
|
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(ordered->partno == 0);
|
|
bdev = bdgrab(ordered->disk->part0);
|
|
if (WARN_ON(!bdev))
|
|
return;
|
|
|
|
if (WARN_ON(btrfs_rmap_block(fs_info, orig_logical, 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);
|
|
bdput(bdev);
|
|
}
|
|
|
|
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 = *cache_ret;
|
|
|
|
if (cache && (eb->start < cache->start ||
|
|
cache->start + cache->length <= eb->start)) {
|
|
btrfs_put_block_group(cache);
|
|
cache = NULL;
|
|
*cache_ret = NULL;
|
|
}
|
|
|
|
if (!cache)
|
|
cache = btrfs_lookup_block_group(fs_info, eb->start);
|
|
|
|
if (cache) {
|
|
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_bio *bbio = 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, &bbio);
|
|
if (ret || !bbio || mapped_length < PAGE_SIZE) {
|
|
btrfs_put_bbio(bbio);
|
|
return -EIO;
|
|
}
|
|
|
|
if (bbio->map_type & BTRFS_BLOCK_GROUP_RAID56_MASK)
|
|
return -EINVAL;
|
|
|
|
nofs_flag = memalloc_nofs_save();
|
|
nmirrors = (int)bbio->num_stripes;
|
|
for (i = 0; i < nmirrors; i++) {
|
|
u64 physical = bbio->stripes[i].physical;
|
|
struct btrfs_device *dev = bbio->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);
|
|
}
|