mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
![Christoph Hellwig](/assets/img/avatar_default.png)
btrfs_redirty_list_add zeroes the buffer data and sets the
EXTENT_BUFFER_NO_CHECK to make sure writeback is fine with a bogus
header. But it does that after already marking the buffer dirty, which
means that writeback could already be looking at the buffer.
Switch the order of operations around so that the buffer is only marked
dirty when we're ready to write it.
Fixes: d3575156f6
("btrfs: zoned: redirty released extent buffers")
CC: stable@vger.kernel.org # 5.15+
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2357 lines
60 KiB
C
2357 lines
60 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
#include <linux/bitops.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/blkdev.h>
|
|
#include <linux/sched/mm.h>
|
|
#include <linux/atomic.h>
|
|
#include <linux/vmalloc.h>
|
|
#include "ctree.h"
|
|
#include "volumes.h"
|
|
#include "zoned.h"
|
|
#include "rcu-string.h"
|
|
#include "disk-io.h"
|
|
#include "block-group.h"
|
|
#include "transaction.h"
|
|
#include "dev-replace.h"
|
|
#include "space-info.h"
|
|
#include "fs.h"
|
|
#include "accessors.h"
|
|
#include "bio.h"
|
|
|
|
/* Maximum number of zones to report per blkdev_report_zones() call */
|
|
#define BTRFS_REPORT_NR_ZONES 4096
|
|
/* Invalid allocation pointer value for missing devices */
|
|
#define WP_MISSING_DEV ((u64)-1)
|
|
/* Pseudo write pointer value for conventional zone */
|
|
#define WP_CONVENTIONAL ((u64)-2)
|
|
|
|
/*
|
|
* Location of the first zone of superblock logging zone pairs.
|
|
*
|
|
* - primary superblock: 0B (zone 0)
|
|
* - first copy: 512G (zone starting at that offset)
|
|
* - second copy: 4T (zone starting at that offset)
|
|
*/
|
|
#define BTRFS_SB_LOG_PRIMARY_OFFSET (0ULL)
|
|
#define BTRFS_SB_LOG_FIRST_OFFSET (512ULL * SZ_1G)
|
|
#define BTRFS_SB_LOG_SECOND_OFFSET (4096ULL * SZ_1G)
|
|
|
|
#define BTRFS_SB_LOG_FIRST_SHIFT const_ilog2(BTRFS_SB_LOG_FIRST_OFFSET)
|
|
#define BTRFS_SB_LOG_SECOND_SHIFT const_ilog2(BTRFS_SB_LOG_SECOND_OFFSET)
|
|
|
|
/* Number of superblock log zones */
|
|
#define BTRFS_NR_SB_LOG_ZONES 2
|
|
|
|
/*
|
|
* Minimum of active zones we need:
|
|
*
|
|
* - BTRFS_SUPER_MIRROR_MAX zones for superblock mirrors
|
|
* - 3 zones to ensure at least one zone per SYSTEM, META and DATA block group
|
|
* - 1 zone for tree-log dedicated block group
|
|
* - 1 zone for relocation
|
|
*/
|
|
#define BTRFS_MIN_ACTIVE_ZONES (BTRFS_SUPER_MIRROR_MAX + 5)
|
|
|
|
/*
|
|
* Minimum / maximum supported zone size. Currently, SMR disks have a zone
|
|
* size of 256MiB, and we are expecting ZNS drives to be in the 1-4GiB range.
|
|
* We do not expect the zone size to become larger than 8GiB or smaller than
|
|
* 4MiB in the near future.
|
|
*/
|
|
#define BTRFS_MAX_ZONE_SIZE SZ_8G
|
|
#define BTRFS_MIN_ZONE_SIZE SZ_4M
|
|
|
|
#define SUPER_INFO_SECTORS ((u64)BTRFS_SUPER_INFO_SIZE >> SECTOR_SHIFT)
|
|
|
|
static inline bool sb_zone_is_full(const struct blk_zone *zone)
|
|
{
|
|
return (zone->cond == BLK_ZONE_COND_FULL) ||
|
|
(zone->wp + SUPER_INFO_SECTORS > zone->start + zone->capacity);
|
|
}
|
|
|
|
static int copy_zone_info_cb(struct blk_zone *zone, unsigned int idx, void *data)
|
|
{
|
|
struct blk_zone *zones = data;
|
|
|
|
memcpy(&zones[idx], zone, sizeof(*zone));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sb_write_pointer(struct block_device *bdev, struct blk_zone *zones,
|
|
u64 *wp_ret)
|
|
{
|
|
bool empty[BTRFS_NR_SB_LOG_ZONES];
|
|
bool full[BTRFS_NR_SB_LOG_ZONES];
|
|
sector_t sector;
|
|
int i;
|
|
|
|
for (i = 0; i < BTRFS_NR_SB_LOG_ZONES; i++) {
|
|
ASSERT(zones[i].type != BLK_ZONE_TYPE_CONVENTIONAL);
|
|
empty[i] = (zones[i].cond == BLK_ZONE_COND_EMPTY);
|
|
full[i] = sb_zone_is_full(&zones[i]);
|
|
}
|
|
|
|
/*
|
|
* Possible states of log buffer zones
|
|
*
|
|
* Empty[0] In use[0] Full[0]
|
|
* Empty[1] * 0 1
|
|
* In use[1] x x 1
|
|
* Full[1] 0 0 C
|
|
*
|
|
* Log position:
|
|
* *: Special case, no superblock is written
|
|
* 0: Use write pointer of zones[0]
|
|
* 1: Use write pointer of zones[1]
|
|
* C: Compare super blocks from zones[0] and zones[1], use the latest
|
|
* one determined by generation
|
|
* x: Invalid state
|
|
*/
|
|
|
|
if (empty[0] && empty[1]) {
|
|
/* Special case to distinguish no superblock to read */
|
|
*wp_ret = zones[0].start << SECTOR_SHIFT;
|
|
return -ENOENT;
|
|
} else if (full[0] && full[1]) {
|
|
/* Compare two super blocks */
|
|
struct address_space *mapping = bdev->bd_inode->i_mapping;
|
|
struct page *page[BTRFS_NR_SB_LOG_ZONES];
|
|
struct btrfs_super_block *super[BTRFS_NR_SB_LOG_ZONES];
|
|
int i;
|
|
|
|
for (i = 0; i < BTRFS_NR_SB_LOG_ZONES; i++) {
|
|
u64 zone_end = (zones[i].start + zones[i].capacity) << SECTOR_SHIFT;
|
|
u64 bytenr = ALIGN_DOWN(zone_end, BTRFS_SUPER_INFO_SIZE) -
|
|
BTRFS_SUPER_INFO_SIZE;
|
|
|
|
page[i] = read_cache_page_gfp(mapping,
|
|
bytenr >> PAGE_SHIFT, GFP_NOFS);
|
|
if (IS_ERR(page[i])) {
|
|
if (i == 1)
|
|
btrfs_release_disk_super(super[0]);
|
|
return PTR_ERR(page[i]);
|
|
}
|
|
super[i] = page_address(page[i]);
|
|
}
|
|
|
|
if (btrfs_super_generation(super[0]) >
|
|
btrfs_super_generation(super[1]))
|
|
sector = zones[1].start;
|
|
else
|
|
sector = zones[0].start;
|
|
|
|
for (i = 0; i < BTRFS_NR_SB_LOG_ZONES; i++)
|
|
btrfs_release_disk_super(super[i]);
|
|
} else if (!full[0] && (empty[1] || full[1])) {
|
|
sector = zones[0].wp;
|
|
} else if (full[0]) {
|
|
sector = zones[1].wp;
|
|
} else {
|
|
return -EUCLEAN;
|
|
}
|
|
*wp_ret = sector << SECTOR_SHIFT;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Get the first zone number of the superblock mirror
|
|
*/
|
|
static inline u32 sb_zone_number(int shift, int mirror)
|
|
{
|
|
u64 zone = U64_MAX;
|
|
|
|
ASSERT(mirror < BTRFS_SUPER_MIRROR_MAX);
|
|
switch (mirror) {
|
|
case 0: zone = 0; break;
|
|
case 1: zone = 1ULL << (BTRFS_SB_LOG_FIRST_SHIFT - shift); break;
|
|
case 2: zone = 1ULL << (BTRFS_SB_LOG_SECOND_SHIFT - shift); break;
|
|
}
|
|
|
|
ASSERT(zone <= U32_MAX);
|
|
|
|
return (u32)zone;
|
|
}
|
|
|
|
static inline sector_t zone_start_sector(u32 zone_number,
|
|
struct block_device *bdev)
|
|
{
|
|
return (sector_t)zone_number << ilog2(bdev_zone_sectors(bdev));
|
|
}
|
|
|
|
static inline u64 zone_start_physical(u32 zone_number,
|
|
struct btrfs_zoned_device_info *zone_info)
|
|
{
|
|
return (u64)zone_number << zone_info->zone_size_shift;
|
|
}
|
|
|
|
/*
|
|
* Emulate blkdev_report_zones() for a non-zoned device. It slices up the block
|
|
* device into static sized chunks and fake a conventional zone on each of
|
|
* them.
|
|
*/
|
|
static int emulate_report_zones(struct btrfs_device *device, u64 pos,
|
|
struct blk_zone *zones, unsigned int nr_zones)
|
|
{
|
|
const sector_t zone_sectors = device->fs_info->zone_size >> SECTOR_SHIFT;
|
|
sector_t bdev_size = bdev_nr_sectors(device->bdev);
|
|
unsigned int i;
|
|
|
|
pos >>= SECTOR_SHIFT;
|
|
for (i = 0; i < nr_zones; i++) {
|
|
zones[i].start = i * zone_sectors + pos;
|
|
zones[i].len = zone_sectors;
|
|
zones[i].capacity = zone_sectors;
|
|
zones[i].wp = zones[i].start + zone_sectors;
|
|
zones[i].type = BLK_ZONE_TYPE_CONVENTIONAL;
|
|
zones[i].cond = BLK_ZONE_COND_NOT_WP;
|
|
|
|
if (zones[i].wp >= bdev_size) {
|
|
i++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return i;
|
|
}
|
|
|
|
static int btrfs_get_dev_zones(struct btrfs_device *device, u64 pos,
|
|
struct blk_zone *zones, unsigned int *nr_zones)
|
|
{
|
|
struct btrfs_zoned_device_info *zinfo = device->zone_info;
|
|
int ret;
|
|
|
|
if (!*nr_zones)
|
|
return 0;
|
|
|
|
if (!bdev_is_zoned(device->bdev)) {
|
|
ret = emulate_report_zones(device, pos, zones, *nr_zones);
|
|
*nr_zones = ret;
|
|
return 0;
|
|
}
|
|
|
|
/* Check cache */
|
|
if (zinfo->zone_cache) {
|
|
unsigned int i;
|
|
u32 zno;
|
|
|
|
ASSERT(IS_ALIGNED(pos, zinfo->zone_size));
|
|
zno = pos >> zinfo->zone_size_shift;
|
|
/*
|
|
* We cannot report zones beyond the zone end. So, it is OK to
|
|
* cap *nr_zones to at the end.
|
|
*/
|
|
*nr_zones = min_t(u32, *nr_zones, zinfo->nr_zones - zno);
|
|
|
|
for (i = 0; i < *nr_zones; i++) {
|
|
struct blk_zone *zone_info;
|
|
|
|
zone_info = &zinfo->zone_cache[zno + i];
|
|
if (!zone_info->len)
|
|
break;
|
|
}
|
|
|
|
if (i == *nr_zones) {
|
|
/* Cache hit on all the zones */
|
|
memcpy(zones, zinfo->zone_cache + zno,
|
|
sizeof(*zinfo->zone_cache) * *nr_zones);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
ret = blkdev_report_zones(device->bdev, pos >> SECTOR_SHIFT, *nr_zones,
|
|
copy_zone_info_cb, zones);
|
|
if (ret < 0) {
|
|
btrfs_err_in_rcu(device->fs_info,
|
|
"zoned: failed to read zone %llu on %s (devid %llu)",
|
|
pos, rcu_str_deref(device->name),
|
|
device->devid);
|
|
return ret;
|
|
}
|
|
*nr_zones = ret;
|
|
if (!ret)
|
|
return -EIO;
|
|
|
|
/* Populate cache */
|
|
if (zinfo->zone_cache) {
|
|
u32 zno = pos >> zinfo->zone_size_shift;
|
|
|
|
memcpy(zinfo->zone_cache + zno, zones,
|
|
sizeof(*zinfo->zone_cache) * *nr_zones);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* The emulated zone size is determined from the size of device extent */
|
|
static int calculate_emulated_zone_size(struct btrfs_fs_info *fs_info)
|
|
{
|
|
struct btrfs_path *path;
|
|
struct btrfs_root *root = fs_info->dev_root;
|
|
struct btrfs_key key;
|
|
struct extent_buffer *leaf;
|
|
struct btrfs_dev_extent *dext;
|
|
int ret = 0;
|
|
|
|
key.objectid = 1;
|
|
key.type = BTRFS_DEV_EXTENT_KEY;
|
|
key.offset = 0;
|
|
|
|
path = btrfs_alloc_path();
|
|
if (!path)
|
|
return -ENOMEM;
|
|
|
|
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
if (path->slots[0] >= btrfs_header_nritems(path->nodes[0])) {
|
|
ret = btrfs_next_leaf(root, path);
|
|
if (ret < 0)
|
|
goto out;
|
|
/* No dev extents at all? Not good */
|
|
if (ret > 0) {
|
|
ret = -EUCLEAN;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
leaf = path->nodes[0];
|
|
dext = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_dev_extent);
|
|
fs_info->zone_size = btrfs_dev_extent_length(leaf, dext);
|
|
ret = 0;
|
|
|
|
out:
|
|
btrfs_free_path(path);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int btrfs_get_dev_zone_info_all_devices(struct btrfs_fs_info *fs_info)
|
|
{
|
|
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
|
|
struct btrfs_device *device;
|
|
int ret = 0;
|
|
|
|
/* fs_info->zone_size might not set yet. Use the incomapt flag here. */
|
|
if (!btrfs_fs_incompat(fs_info, ZONED))
|
|
return 0;
|
|
|
|
mutex_lock(&fs_devices->device_list_mutex);
|
|
list_for_each_entry(device, &fs_devices->devices, dev_list) {
|
|
/* We can skip reading of zone info for missing devices */
|
|
if (!device->bdev)
|
|
continue;
|
|
|
|
ret = btrfs_get_dev_zone_info(device, true);
|
|
if (ret)
|
|
break;
|
|
}
|
|
mutex_unlock(&fs_devices->device_list_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int btrfs_get_dev_zone_info(struct btrfs_device *device, bool populate_cache)
|
|
{
|
|
struct btrfs_fs_info *fs_info = device->fs_info;
|
|
struct btrfs_zoned_device_info *zone_info = NULL;
|
|
struct block_device *bdev = device->bdev;
|
|
unsigned int max_active_zones;
|
|
unsigned int nactive;
|
|
sector_t nr_sectors;
|
|
sector_t sector = 0;
|
|
struct blk_zone *zones = NULL;
|
|
unsigned int i, nreported = 0, nr_zones;
|
|
sector_t zone_sectors;
|
|
char *model, *emulated;
|
|
int ret;
|
|
|
|
/*
|
|
* Cannot use btrfs_is_zoned here, since fs_info::zone_size might not
|
|
* yet be set.
|
|
*/
|
|
if (!btrfs_fs_incompat(fs_info, ZONED))
|
|
return 0;
|
|
|
|
if (device->zone_info)
|
|
return 0;
|
|
|
|
zone_info = kzalloc(sizeof(*zone_info), GFP_KERNEL);
|
|
if (!zone_info)
|
|
return -ENOMEM;
|
|
|
|
device->zone_info = zone_info;
|
|
|
|
if (!bdev_is_zoned(bdev)) {
|
|
if (!fs_info->zone_size) {
|
|
ret = calculate_emulated_zone_size(fs_info);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
ASSERT(fs_info->zone_size);
|
|
zone_sectors = fs_info->zone_size >> SECTOR_SHIFT;
|
|
} else {
|
|
zone_sectors = bdev_zone_sectors(bdev);
|
|
}
|
|
|
|
ASSERT(is_power_of_two_u64(zone_sectors));
|
|
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;
|
|
} else if (zone_info->zone_size < BTRFS_MIN_ZONE_SIZE) {
|
|
btrfs_err_in_rcu(fs_info,
|
|
"zoned: %s: zone size %llu smaller than supported minimum %u",
|
|
rcu_str_deref(device->name),
|
|
zone_info->zone_size, BTRFS_MIN_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 = bdev_max_active_zones(bdev);
|
|
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 = kvcalloc(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);
|
|
set_bit(BTRFS_FS_ACTIVE_ZONE_TRACKING, &fs_info->flags);
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
}
|
|
|
|
|
|
kvfree(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:
|
|
kvfree(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;
|
|
}
|
|
|
|
struct btrfs_zoned_device_info *btrfs_clone_dev_zone_info(struct btrfs_device *orig_dev)
|
|
{
|
|
struct btrfs_zoned_device_info *zone_info;
|
|
|
|
zone_info = kmemdup(orig_dev->zone_info, sizeof(*zone_info), GFP_KERNEL);
|
|
if (!zone_info)
|
|
return NULL;
|
|
|
|
zone_info->seq_zones = bitmap_zalloc(zone_info->nr_zones, GFP_KERNEL);
|
|
if (!zone_info->seq_zones)
|
|
goto out;
|
|
|
|
bitmap_copy(zone_info->seq_zones, orig_dev->zone_info->seq_zones,
|
|
zone_info->nr_zones);
|
|
|
|
zone_info->empty_zones = bitmap_zalloc(zone_info->nr_zones, GFP_KERNEL);
|
|
if (!zone_info->empty_zones)
|
|
goto out;
|
|
|
|
bitmap_copy(zone_info->empty_zones, orig_dev->zone_info->empty_zones,
|
|
zone_info->nr_zones);
|
|
|
|
zone_info->active_zones = bitmap_zalloc(zone_info->nr_zones, GFP_KERNEL);
|
|
if (!zone_info->active_zones)
|
|
goto out;
|
|
|
|
bitmap_copy(zone_info->active_zones, orig_dev->zone_info->active_zones,
|
|
zone_info->nr_zones);
|
|
zone_info->zone_cache = NULL;
|
|
|
|
return zone_info;
|
|
|
|
out:
|
|
bitmap_free(zone_info->seq_zones);
|
|
bitmap_free(zone_info->empty_zones);
|
|
bitmap_free(zone_info->active_zones);
|
|
kfree(zone_info);
|
|
return 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;
|
|
}
|
|
|
|
static int btrfs_check_for_zoned_device(struct btrfs_fs_info *fs_info)
|
|
{
|
|
struct btrfs_device *device;
|
|
|
|
list_for_each_entry(device, &fs_info->fs_devices->devices, dev_list) {
|
|
if (device->bdev &&
|
|
bdev_zoned_model(device->bdev) == BLK_ZONED_HM) {
|
|
btrfs_err(fs_info,
|
|
"zoned: mode not enabled but zoned device found: %pg",
|
|
device->bdev);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int btrfs_check_zoned_mode(struct btrfs_fs_info *fs_info)
|
|
{
|
|
struct queue_limits *lim = &fs_info->limits;
|
|
struct btrfs_device *device;
|
|
u64 zone_size = 0;
|
|
int ret;
|
|
|
|
/*
|
|
* Host-Managed devices can't be used without the ZONED flag. With the
|
|
* ZONED all devices can be used, using zone emulation if required.
|
|
*/
|
|
if (!btrfs_fs_incompat(fs_info, ZONED))
|
|
return btrfs_check_for_zoned_device(fs_info);
|
|
|
|
blk_set_stacking_limits(lim);
|
|
|
|
list_for_each_entry(device, &fs_info->fs_devices->devices, dev_list) {
|
|
struct btrfs_zoned_device_info *zone_info = device->zone_info;
|
|
|
|
if (!device->bdev)
|
|
continue;
|
|
|
|
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",
|
|
zone_info->zone_size, zone_size);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* With the zoned emulation, we can have non-zoned device on the
|
|
* zoned mode. In this case, we don't have a valid max zone
|
|
* append size.
|
|
*/
|
|
if (bdev_is_zoned(device->bdev)) {
|
|
blk_stack_limits(lim,
|
|
&bdev_get_queue(device->bdev)->limits,
|
|
0);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (btrfs_fs_incompat(fs_info, MIXED_GROUPS)) {
|
|
btrfs_err(fs_info, "zoned: mixed block groups not supported");
|
|
return -EINVAL;
|
|
}
|
|
|
|
fs_info->zone_size = zone_size;
|
|
/*
|
|
* Also limit max_zone_append_size by max_segments * PAGE_SIZE.
|
|
* Technically, we can have multiple pages per segment. But, since
|
|
* we add the pages one by one to a bio, and cannot increase the
|
|
* metadata reservation even if it increases the number of extents, it
|
|
* is safe to stick with the limit.
|
|
*/
|
|
fs_info->max_zone_append_size = ALIGN_DOWN(
|
|
min3((u64)lim->max_zone_append_sectors << SECTOR_SHIFT,
|
|
(u64)lim->max_sectors << SECTOR_SHIFT,
|
|
(u64)lim->max_segments << PAGE_SHIFT),
|
|
fs_info->sectorsize);
|
|
fs_info->fs_devices->chunk_alloc_policy = BTRFS_CHUNK_ALLOC_ZONED;
|
|
if (fs_info->max_zone_append_size < fs_info->max_extent_size)
|
|
fs_info->max_extent_size = fs_info->max_zone_append_size;
|
|
|
|
/*
|
|
* 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)
|
|
return ret;
|
|
|
|
btrfs_info(fs_info, "zoned mode enabled with zone size %llu", zone_size);
|
|
return 0;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* 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, end, begin) == end)
|
|
return 0;
|
|
|
|
/* All the zones are sequential and empty */
|
|
if (find_next_zero_bit(zinfo->seq_zones, end, begin) == end &&
|
|
find_next_zero_bit(zinfo->empty_zones, end, begin) == 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, bool new)
|
|
{
|
|
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;
|
|
|
|
/*
|
|
* Avoid tree lookups for a new block group, there's no use for it.
|
|
* It must always be 0.
|
|
*
|
|
* Also, we have a lock chain of extent buffer lock -> chunk mutex.
|
|
* For new a block group, 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) {
|
|
*offset_ret = 0;
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
int ret;
|
|
int i;
|
|
unsigned int nofs_flag;
|
|
u64 *alloc_offsets = NULL;
|
|
u64 *caps = NULL;
|
|
u64 *physical = 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;
|
|
}
|
|
|
|
physical = kcalloc(map->num_stripes, sizeof(*physical), GFP_NOFS);
|
|
if (!physical) {
|
|
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[i] = map->stripes[i].physical;
|
|
|
|
if (device->bdev == NULL) {
|
|
alloc_offsets[i] = WP_MISSING_DEV;
|
|
continue;
|
|
}
|
|
|
|
is_sequential = btrfs_dev_is_sequential(device, physical[i]);
|
|
if (is_sequential)
|
|
num_sequential++;
|
|
else
|
|
num_conventional++;
|
|
|
|
/*
|
|
* 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 (!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[i]);
|
|
|
|
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[i]);
|
|
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[i], fs_info->zone_size));
|
|
nofs_flag = memalloc_nofs_save();
|
|
ret = btrfs_get_dev_zone(device, physical[i], &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[i] >> 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;
|
|
}
|
|
}
|
|
|
|
if (num_sequential > 0)
|
|
set_bit(BLOCK_GROUP_FLAG_SEQUENTIAL_ZONE, &cache->runtime_flags);
|
|
|
|
if (num_conventional > 0) {
|
|
/* Zone capacity is always zone size in emulation */
|
|
cache->zone_capacity = cache->length;
|
|
ret = calculate_alloc_pointer(cache, &last_alloc, new);
|
|
if (ret) {
|
|
btrfs_err(fs_info,
|
|
"zoned: failed to determine allocation offset of bg %llu",
|
|
cache->start);
|
|
goto out;
|
|
} else if (map->num_stripes == num_conventional) {
|
|
cache->alloc_offset = last_alloc;
|
|
set_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &cache->runtime_flags);
|
|
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[0]);
|
|
ret = -EIO;
|
|
goto out;
|
|
}
|
|
cache->alloc_offset = alloc_offsets[0];
|
|
cache->zone_capacity = caps[0];
|
|
if (test_bit(0, active))
|
|
set_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &cache->runtime_flags);
|
|
break;
|
|
case BTRFS_BLOCK_GROUP_DUP:
|
|
if (map->type & BTRFS_BLOCK_GROUP_DATA) {
|
|
btrfs_err(fs_info, "zoned: profile DUP not yet supported on data bg");
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
if (alloc_offsets[0] == WP_MISSING_DEV) {
|
|
btrfs_err(fs_info,
|
|
"zoned: cannot recover write pointer for zone %llu",
|
|
physical[0]);
|
|
ret = -EIO;
|
|
goto out;
|
|
}
|
|
if (alloc_offsets[1] == WP_MISSING_DEV) {
|
|
btrfs_err(fs_info,
|
|
"zoned: cannot recover write pointer for zone %llu",
|
|
physical[1]);
|
|
ret = -EIO;
|
|
goto out;
|
|
}
|
|
if (alloc_offsets[0] != alloc_offsets[1]) {
|
|
btrfs_err(fs_info,
|
|
"zoned: write pointer offset mismatch of zones in DUP profile");
|
|
ret = -EIO;
|
|
goto out;
|
|
}
|
|
if (test_bit(0, active) != test_bit(1, active)) {
|
|
if (!btrfs_zone_activate(cache)) {
|
|
ret = -EIO;
|
|
goto out;
|
|
}
|
|
} else {
|
|
if (test_bit(0, active))
|
|
set_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE,
|
|
&cache->runtime_flags);
|
|
}
|
|
cache->alloc_offset = alloc_offsets[0];
|
|
cache->zone_capacity = min(caps[0], caps[1]);
|
|
break;
|
|
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:
|
|
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 (test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &cache->runtime_flags)) {
|
|
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);
|
|
}
|
|
} else {
|
|
kfree(cache->physical_map);
|
|
cache->physical_map = NULL;
|
|
}
|
|
bitmap_free(active);
|
|
kfree(physical);
|
|
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);
|
|
|
|
/* Check for block groups never get activated */
|
|
if (test_bit(BTRFS_FS_ACTIVE_ZONE_TRACKING, &cache->fs_info->flags) &&
|
|
cache->flags & (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_SYSTEM) &&
|
|
!test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &cache->runtime_flags) &&
|
|
cache->alloc_offset == 0) {
|
|
unusable = cache->length;
|
|
free = 0;
|
|
} else {
|
|
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->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;
|
|
|
|
memzero_extent_buffer(eb, 0, eb->len);
|
|
set_bit(EXTENT_BUFFER_NO_CHECK, &eb->bflags);
|
|
set_extent_buffer_dirty(eb);
|
|
set_extent_bits_nowait(&trans->dirty_pages, eb->start,
|
|
eb->start + eb->len - 1, EXTENT_DIRTY);
|
|
|
|
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_bio *bbio)
|
|
{
|
|
u64 start = (bbio->bio.bi_iter.bi_sector << SECTOR_SHIFT);
|
|
struct btrfs_inode *inode = bbio->inode;
|
|
struct btrfs_fs_info *fs_info = bbio->fs_info;
|
|
struct btrfs_block_group *cache;
|
|
bool ret = false;
|
|
|
|
if (!btrfs_is_zoned(fs_info))
|
|
return false;
|
|
|
|
if (!inode || !is_data_inode(&inode->vfs_inode))
|
|
return false;
|
|
|
|
if (btrfs_op(&bbio->bio) != BTRFS_MAP_WRITE)
|
|
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 = !!test_bit(BLOCK_GROUP_FLAG_SEQUENTIAL_ZONE, &cache->runtime_flags);
|
|
btrfs_put_block_group(cache);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void btrfs_record_physical_zoned(struct btrfs_bio *bbio)
|
|
{
|
|
const u64 physical = bbio->bio.bi_iter.bi_sector << SECTOR_SHIFT;
|
|
struct btrfs_ordered_extent *ordered;
|
|
|
|
ordered = btrfs_lookup_ordered_extent(bbio->inode, bbio->file_offset);
|
|
if (WARN_ON(!ordered))
|
|
return;
|
|
|
|
ordered->physical = physical;
|
|
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;
|
|
struct map_lookup *map;
|
|
u64 physical = ordered->physical;
|
|
u64 chunk_start_phys;
|
|
u64 logical;
|
|
|
|
em = btrfs_get_chunk_map(fs_info, orig_logical, 1);
|
|
if (IS_ERR(em))
|
|
return;
|
|
map = em->map_lookup;
|
|
chunk_start_phys = map->stripes[0].physical;
|
|
|
|
if (WARN_ON_ONCE(map->num_stripes > 1) ||
|
|
WARN_ON_ONCE((map->type & BTRFS_BLOCK_GROUP_PROFILE_MASK) != 0) ||
|
|
WARN_ON_ONCE(physical < chunk_start_phys) ||
|
|
WARN_ON_ONCE(physical > chunk_start_phys + em->orig_block_len)) {
|
|
free_extent_map(em);
|
|
return;
|
|
}
|
|
logical = em->start + (physical - map->stripes[0].physical);
|
|
free_extent_map(em);
|
|
|
|
if (orig_logical == logical)
|
|
return;
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
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) {
|
|
ret = -EIO;
|
|
goto out_put_bioc;
|
|
}
|
|
|
|
if (bioc->map_type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
|
|
ret = -EINVAL;
|
|
goto out_put_bioc;
|
|
}
|
|
|
|
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);
|
|
out_put_bioc:
|
|
btrfs_put_bioc(bioc);
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* 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 btrfs_space_info *space_info = block_group->space_info;
|
|
struct map_lookup *map;
|
|
struct btrfs_device *device;
|
|
u64 physical;
|
|
bool ret;
|
|
int i;
|
|
|
|
if (!btrfs_is_zoned(block_group->fs_info))
|
|
return true;
|
|
|
|
map = block_group->physical_map;
|
|
|
|
spin_lock(&space_info->lock);
|
|
spin_lock(&block_group->lock);
|
|
if (test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &block_group->runtime_flags)) {
|
|
ret = true;
|
|
goto out_unlock;
|
|
}
|
|
|
|
/* No space left */
|
|
if (btrfs_zoned_bg_is_full(block_group)) {
|
|
ret = false;
|
|
goto out_unlock;
|
|
}
|
|
|
|
for (i = 0; i < map->num_stripes; i++) {
|
|
device = map->stripes[i].dev;
|
|
physical = map->stripes[i].physical;
|
|
|
|
if (device->zone_info->max_active_zones == 0)
|
|
continue;
|
|
|
|
if (!btrfs_dev_set_active_zone(device, physical)) {
|
|
/* Cannot activate the zone */
|
|
ret = false;
|
|
goto out_unlock;
|
|
}
|
|
}
|
|
|
|
/* Successfully activated all the zones */
|
|
set_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &block_group->runtime_flags);
|
|
WARN_ON(block_group->alloc_offset != 0);
|
|
if (block_group->zone_unusable == block_group->length) {
|
|
block_group->zone_unusable = block_group->length - block_group->zone_capacity;
|
|
space_info->bytes_zone_unusable -= block_group->zone_capacity;
|
|
}
|
|
spin_unlock(&block_group->lock);
|
|
btrfs_try_granting_tickets(fs_info, space_info);
|
|
spin_unlock(&space_info->lock);
|
|
|
|
/* For the active block group list */
|
|
btrfs_get_block_group(block_group);
|
|
|
|
spin_lock(&fs_info->zone_active_bgs_lock);
|
|
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);
|
|
spin_unlock(&space_info->lock);
|
|
return ret;
|
|
}
|
|
|
|
static void wait_eb_writebacks(struct btrfs_block_group *block_group)
|
|
{
|
|
struct btrfs_fs_info *fs_info = block_group->fs_info;
|
|
const u64 end = block_group->start + block_group->length;
|
|
struct radix_tree_iter iter;
|
|
struct extent_buffer *eb;
|
|
void __rcu **slot;
|
|
|
|
rcu_read_lock();
|
|
radix_tree_for_each_slot(slot, &fs_info->buffer_radix, &iter,
|
|
block_group->start >> fs_info->sectorsize_bits) {
|
|
eb = radix_tree_deref_slot(slot);
|
|
if (!eb)
|
|
continue;
|
|
if (radix_tree_deref_retry(eb)) {
|
|
slot = radix_tree_iter_retry(&iter);
|
|
continue;
|
|
}
|
|
|
|
if (eb->start < block_group->start)
|
|
continue;
|
|
if (eb->start >= end)
|
|
break;
|
|
|
|
slot = radix_tree_iter_resume(slot, &iter);
|
|
rcu_read_unlock();
|
|
wait_on_extent_buffer_writeback(eb);
|
|
rcu_read_lock();
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
static int do_zone_finish(struct btrfs_block_group *block_group, bool fully_written)
|
|
{
|
|
struct btrfs_fs_info *fs_info = block_group->fs_info;
|
|
struct map_lookup *map;
|
|
const bool is_metadata = (block_group->flags &
|
|
(BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_SYSTEM));
|
|
int ret = 0;
|
|
int i;
|
|
|
|
spin_lock(&block_group->lock);
|
|
if (!test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &block_group->runtime_flags)) {
|
|
spin_unlock(&block_group->lock);
|
|
return 0;
|
|
}
|
|
|
|
/* Check if we have unwritten allocated space */
|
|
if (is_metadata &&
|
|
block_group->start + block_group->alloc_offset > block_group->meta_write_pointer) {
|
|
spin_unlock(&block_group->lock);
|
|
return -EAGAIN;
|
|
}
|
|
|
|
/*
|
|
* If we are sure that the block group is full (= no more room left for
|
|
* new allocation) and the IO for the last usable block is completed, we
|
|
* don't need to wait for the other IOs. This holds because we ensure
|
|
* the sequential IO submissions using the ZONE_APPEND command for data
|
|
* and block_group->meta_write_pointer for metadata.
|
|
*/
|
|
if (!fully_written) {
|
|
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);
|
|
/* Wait for extent buffers to be written. */
|
|
if (is_metadata)
|
|
wait_eb_writebacks(block_group);
|
|
|
|
spin_lock(&block_group->lock);
|
|
|
|
/*
|
|
* Bail out if someone already deactivated the block group, or
|
|
* allocated space is left in the block group.
|
|
*/
|
|
if (!test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE,
|
|
&block_group->runtime_flags)) {
|
|
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;
|
|
}
|
|
}
|
|
|
|
clear_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE, &block_group->runtime_flags);
|
|
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);
|
|
|
|
map = block_group->physical_map;
|
|
for (i = 0; i < map->num_stripes; i++) {
|
|
struct btrfs_device *device = map->stripes[i].dev;
|
|
const u64 physical = map->stripes[i].physical;
|
|
|
|
if (device->zone_info->max_active_zones == 0)
|
|
continue;
|
|
|
|
ret = blkdev_zone_mgmt(device->bdev, REQ_OP_ZONE_FINISH,
|
|
physical >> SECTOR_SHIFT,
|
|
device->zone_info->zone_size >> SECTOR_SHIFT,
|
|
GFP_NOFS);
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
btrfs_dev_clear_active_zone(device, physical);
|
|
}
|
|
|
|
if (!fully_written)
|
|
btrfs_dec_block_group_ro(block_group);
|
|
|
|
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);
|
|
|
|
clear_and_wake_up_bit(BTRFS_FS_NEED_ZONE_FINISH, &fs_info->flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int btrfs_zone_finish(struct btrfs_block_group *block_group)
|
|
{
|
|
if (!btrfs_is_zoned(block_group->fs_info))
|
|
return 0;
|
|
|
|
return do_zone_finish(block_group, false);
|
|
}
|
|
|
|
bool btrfs_can_activate_zone(struct btrfs_fs_devices *fs_devices, u64 flags)
|
|
{
|
|
struct btrfs_fs_info *fs_info = fs_devices->fs_info;
|
|
struct btrfs_device *device;
|
|
bool ret = false;
|
|
|
|
if (!btrfs_is_zoned(fs_info))
|
|
return true;
|
|
|
|
/* Check if there is a device with active zones left */
|
|
mutex_lock(&fs_info->chunk_mutex);
|
|
list_for_each_entry(device, &fs_devices->alloc_list, dev_alloc_list) {
|
|
struct btrfs_zoned_device_info *zinfo = device->zone_info;
|
|
|
|
if (!device->bdev)
|
|
continue;
|
|
|
|
if (!zinfo->max_active_zones) {
|
|
ret = true;
|
|
break;
|
|
}
|
|
|
|
switch (flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
|
|
case 0: /* single */
|
|
ret = (atomic_read(&zinfo->active_zones_left) >= 1);
|
|
break;
|
|
case BTRFS_BLOCK_GROUP_DUP:
|
|
ret = (atomic_read(&zinfo->active_zones_left) >= 2);
|
|
break;
|
|
}
|
|
if (ret)
|
|
break;
|
|
}
|
|
mutex_unlock(&fs_info->chunk_mutex);
|
|
|
|
if (!ret)
|
|
set_bit(BTRFS_FS_NEED_ZONE_FINISH, &fs_info->flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical, u64 length)
|
|
{
|
|
struct btrfs_block_group *block_group;
|
|
u64 min_alloc_bytes;
|
|
|
|
if (!btrfs_is_zoned(fs_info))
|
|
return;
|
|
|
|
block_group = btrfs_lookup_block_group(fs_info, logical);
|
|
ASSERT(block_group);
|
|
|
|
/* No MIXED_BG on zoned btrfs. */
|
|
if (block_group->flags & BTRFS_BLOCK_GROUP_DATA)
|
|
min_alloc_bytes = fs_info->sectorsize;
|
|
else
|
|
min_alloc_bytes = fs_info->nodesize;
|
|
|
|
/* Bail out if we can allocate more data from this block group. */
|
|
if (logical + length + min_alloc_bytes <=
|
|
block_group->start + block_group->zone_capacity)
|
|
goto out;
|
|
|
|
do_zone_finish(block_group, true);
|
|
|
|
out:
|
|
btrfs_put_block_group(block_group);
|
|
}
|
|
|
|
static void btrfs_zone_finish_endio_workfn(struct work_struct *work)
|
|
{
|
|
struct btrfs_block_group *bg =
|
|
container_of(work, struct btrfs_block_group, zone_finish_work);
|
|
|
|
wait_on_extent_buffer_writeback(bg->last_eb);
|
|
free_extent_buffer(bg->last_eb);
|
|
btrfs_zone_finish_endio(bg->fs_info, bg->start, bg->length);
|
|
btrfs_put_block_group(bg);
|
|
}
|
|
|
|
void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg,
|
|
struct extent_buffer *eb)
|
|
{
|
|
if (!test_bit(BLOCK_GROUP_FLAG_SEQUENTIAL_ZONE, &bg->runtime_flags) ||
|
|
eb->start + eb->len * 2 <= bg->start + bg->zone_capacity)
|
|
return;
|
|
|
|
if (WARN_ON(bg->zone_finish_work.func == btrfs_zone_finish_endio_workfn)) {
|
|
btrfs_err(bg->fs_info, "double scheduling of bg %llu zone finishing",
|
|
bg->start);
|
|
return;
|
|
}
|
|
|
|
/* For the work */
|
|
btrfs_get_block_group(bg);
|
|
atomic_inc(&eb->refs);
|
|
bg->last_eb = eb;
|
|
INIT_WORK(&bg->zone_finish_work, btrfs_zone_finish_endio_workfn);
|
|
queue_work(system_unbound_wq, &bg->zone_finish_work);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info)
|
|
{
|
|
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
|
|
struct btrfs_device *device;
|
|
u64 used = 0;
|
|
u64 total = 0;
|
|
u64 factor;
|
|
|
|
ASSERT(btrfs_is_zoned(fs_info));
|
|
|
|
if (fs_info->bg_reclaim_threshold == 0)
|
|
return false;
|
|
|
|
mutex_lock(&fs_devices->device_list_mutex);
|
|
list_for_each_entry(device, &fs_devices->devices, dev_list) {
|
|
if (!device->bdev)
|
|
continue;
|
|
|
|
total += device->disk_total_bytes;
|
|
used += device->bytes_used;
|
|
}
|
|
mutex_unlock(&fs_devices->device_list_mutex);
|
|
|
|
factor = div64_u64(used * 100, total);
|
|
return factor >= fs_info->bg_reclaim_threshold;
|
|
}
|
|
|
|
void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, u64 logical,
|
|
u64 length)
|
|
{
|
|
struct btrfs_block_group *block_group;
|
|
|
|
if (!btrfs_is_zoned(fs_info))
|
|
return;
|
|
|
|
block_group = btrfs_lookup_block_group(fs_info, logical);
|
|
/* It should be called on a previous data relocation block group. */
|
|
ASSERT(block_group && (block_group->flags & BTRFS_BLOCK_GROUP_DATA));
|
|
|
|
spin_lock(&block_group->lock);
|
|
if (!test_bit(BLOCK_GROUP_FLAG_ZONED_DATA_RELOC, &block_group->runtime_flags))
|
|
goto out;
|
|
|
|
/* All relocation extents are written. */
|
|
if (block_group->start + block_group->alloc_offset == logical + length) {
|
|
/* Now, release this block group for further allocations. */
|
|
clear_bit(BLOCK_GROUP_FLAG_ZONED_DATA_RELOC,
|
|
&block_group->runtime_flags);
|
|
}
|
|
|
|
out:
|
|
spin_unlock(&block_group->lock);
|
|
btrfs_put_block_group(block_group);
|
|
}
|
|
|
|
int btrfs_zone_finish_one_bg(struct btrfs_fs_info *fs_info)
|
|
{
|
|
struct btrfs_block_group *block_group;
|
|
struct btrfs_block_group *min_bg = NULL;
|
|
u64 min_avail = U64_MAX;
|
|
int ret;
|
|
|
|
spin_lock(&fs_info->zone_active_bgs_lock);
|
|
list_for_each_entry(block_group, &fs_info->zone_active_bgs,
|
|
active_bg_list) {
|
|
u64 avail;
|
|
|
|
spin_lock(&block_group->lock);
|
|
if (block_group->reserved || block_group->alloc_offset == 0 ||
|
|
(block_group->flags & BTRFS_BLOCK_GROUP_SYSTEM)) {
|
|
spin_unlock(&block_group->lock);
|
|
continue;
|
|
}
|
|
|
|
avail = block_group->zone_capacity - block_group->alloc_offset;
|
|
if (min_avail > avail) {
|
|
if (min_bg)
|
|
btrfs_put_block_group(min_bg);
|
|
min_bg = block_group;
|
|
min_avail = avail;
|
|
btrfs_get_block_group(min_bg);
|
|
}
|
|
spin_unlock(&block_group->lock);
|
|
}
|
|
spin_unlock(&fs_info->zone_active_bgs_lock);
|
|
|
|
if (!min_bg)
|
|
return 0;
|
|
|
|
ret = btrfs_zone_finish(min_bg);
|
|
btrfs_put_block_group(min_bg);
|
|
|
|
return ret < 0 ? ret : 1;
|
|
}
|
|
|
|
int btrfs_zoned_activate_one_bg(struct btrfs_fs_info *fs_info,
|
|
struct btrfs_space_info *space_info,
|
|
bool do_finish)
|
|
{
|
|
struct btrfs_block_group *bg;
|
|
int index;
|
|
|
|
if (!btrfs_is_zoned(fs_info) || (space_info->flags & BTRFS_BLOCK_GROUP_DATA))
|
|
return 0;
|
|
|
|
for (;;) {
|
|
int ret;
|
|
bool need_finish = false;
|
|
|
|
down_read(&space_info->groups_sem);
|
|
for (index = 0; index < BTRFS_NR_RAID_TYPES; index++) {
|
|
list_for_each_entry(bg, &space_info->block_groups[index],
|
|
list) {
|
|
if (!spin_trylock(&bg->lock))
|
|
continue;
|
|
if (btrfs_zoned_bg_is_full(bg) ||
|
|
test_bit(BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE,
|
|
&bg->runtime_flags)) {
|
|
spin_unlock(&bg->lock);
|
|
continue;
|
|
}
|
|
spin_unlock(&bg->lock);
|
|
|
|
if (btrfs_zone_activate(bg)) {
|
|
up_read(&space_info->groups_sem);
|
|
return 1;
|
|
}
|
|
|
|
need_finish = true;
|
|
}
|
|
}
|
|
up_read(&space_info->groups_sem);
|
|
|
|
if (!do_finish || !need_finish)
|
|
break;
|
|
|
|
ret = btrfs_zone_finish_one_bg(fs_info);
|
|
if (ret == 0)
|
|
break;
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|