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-rw-r--r--fs/btrfs/Makefile1
-rw-r--r--fs/btrfs/dev-replace.c5
-rw-r--r--fs/btrfs/super.c5
-rw-r--r--fs/btrfs/volumes.c20
-rw-r--r--fs/btrfs/volumes.h4
-rw-r--r--fs/btrfs/zoned.c168
-rw-r--r--fs/btrfs/zoned.h87
7 files changed, 287 insertions, 3 deletions
diff --git a/fs/btrfs/Makefile b/fs/btrfs/Makefile
index e738f6206ea5..0497fdc37f90 100644
--- a/fs/btrfs/Makefile
+++ b/fs/btrfs/Makefile
@@ -16,6 +16,7 @@ btrfs-y += super.o ctree.o extent-tree.o print-tree.o root-tree.o dir-item.o \
btrfs-$(CONFIG_BTRFS_FS_POSIX_ACL) += acl.o
btrfs-$(CONFIG_BTRFS_FS_CHECK_INTEGRITY) += check-integrity.o
btrfs-$(CONFIG_BTRFS_FS_REF_VERIFY) += ref-verify.o
+btrfs-$(CONFIG_BLK_DEV_ZONED) += zoned.o
btrfs-$(CONFIG_BTRFS_FS_RUN_SANITY_TESTS) += tests/free-space-tests.o \
tests/extent-buffer-tests.o tests/btrfs-tests.o \
diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index dc3481014f16..71a1bddcbc76 100644
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -21,6 +21,7 @@
#include "rcu-string.h"
#include "dev-replace.h"
#include "sysfs.h"
+#include "zoned.h"
/*
* Device replace overview
@@ -313,6 +314,10 @@ static int btrfs_init_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
set_blocksize(device->bdev, BTRFS_BDEV_BLOCKSIZE);
device->fs_devices = fs_info->fs_devices;
+ ret = btrfs_get_dev_zone_info(device);
+ if (ret)
+ goto error;
+
mutex_lock(&fs_info->fs_devices->device_list_mutex);
list_add(&device->dev_list, &fs_info->fs_devices->devices);
fs_info->fs_devices->num_devices++;
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 348f8899f4f4..3c39e363aec5 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -2514,6 +2514,11 @@ static void __init btrfs_print_mod_info(void)
#ifdef CONFIG_BTRFS_FS_REF_VERIFY
", ref-verify=on"
#endif
+#ifdef CONFIG_BLK_DEV_ZONED
+ ", zoned=yes"
+#else
+ ", zoned=no"
+#endif
;
pr_info("Btrfs loaded, crc32c=%s%s\n", crc32c_impl(), options);
}
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 7132af058a95..f250bf4dc91f 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -31,6 +31,7 @@
#include "space-info.h"
#include "block-group.h"
#include "discard.h"
+#include "zoned.h"
const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES] = {
[BTRFS_RAID_RAID10] = {
@@ -374,6 +375,7 @@ void btrfs_free_device(struct btrfs_device *device)
rcu_string_free(device->name);
extent_io_tree_release(&device->alloc_state);
bio_put(device->flush_bio);
+ btrfs_destroy_dev_zone_info(device);
kfree(device);
}
@@ -667,6 +669,10 @@ static int btrfs_open_one_device(struct btrfs_fs_devices *fs_devices,
clear_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state);
device->mode = flags;
+ ret = btrfs_get_dev_zone_info(device);
+ if (ret != 0)
+ goto error_free_page;
+
fs_devices->open_devices++;
if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state) &&
device->devid != BTRFS_DEV_REPLACE_DEVID) {
@@ -1137,6 +1143,7 @@ static void btrfs_close_one_device(struct btrfs_device *device)
device->bdev = NULL;
}
clear_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state);
+ btrfs_destroy_dev_zone_info(device);
device->fs_info = NULL;
atomic_set(&device->dev_stats_ccnt, 0);
@@ -2541,10 +2548,17 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
}
rcu_assign_pointer(device->name, name);
+ device->fs_info = fs_info;
+ device->bdev = bdev;
+
+ ret = btrfs_get_dev_zone_info(device);
+ if (ret)
+ goto error_free_device;
+
trans = btrfs_start_transaction(root, 0);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
- goto error_free_device;
+ goto error_free_zone;
}
q = bdev_get_queue(bdev);
@@ -2557,8 +2571,6 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
fs_info->sectorsize);
device->disk_total_bytes = device->total_bytes;
device->commit_total_bytes = device->total_bytes;
- device->fs_info = fs_info;
- device->bdev = bdev;
set_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state);
clear_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state);
device->mode = FMODE_EXCL;
@@ -2705,6 +2717,8 @@ error_trans:
sb->s_flags |= SB_RDONLY;
if (trans)
btrfs_end_transaction(trans);
+error_free_zone:
+ btrfs_destroy_dev_zone_info(device);
error_free_device:
btrfs_free_device(device);
error:
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 5e08274d1252..1997a4649a66 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -52,6 +52,8 @@ struct btrfs_io_geometry {
#define BTRFS_DEV_STATE_FLUSH_SENT (4)
#define BTRFS_DEV_STATE_NO_READA (5)
+struct btrfs_zoned_device_info;
+
struct btrfs_device {
struct list_head dev_list; /* device_list_mutex */
struct list_head dev_alloc_list; /* chunk mutex */
@@ -65,6 +67,8 @@ struct btrfs_device {
struct block_device *bdev;
+ struct btrfs_zoned_device_info *zone_info;
+
/* the mode sent to blkdev_get */
fmode_t mode;
diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c
new file mode 100644
index 000000000000..38d7bf45b83f
--- /dev/null
+++ b/fs/btrfs/zoned.c
@@ -0,0 +1,168 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/slab.h>
+#include <linux/blkdev.h>
+#include "ctree.h"
+#include "volumes.h"
+#include "zoned.h"
+#include "rcu-string.h"
+
+/* Maximum number of zones to report per blkdev_report_zones() call */
+#define BTRFS_REPORT_NR_ZONES 4096
+
+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 btrfs_get_dev_zones(struct btrfs_device *device, u64 pos,
+ struct blk_zone *zones, unsigned int *nr_zones)
+{
+ int ret;
+
+ if (!*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;
+
+ return 0;
+}
+
+int btrfs_get_dev_zone_info(struct btrfs_device *device)
+{
+ struct btrfs_zoned_device_info *zone_info = NULL;
+ struct block_device *bdev = device->bdev;
+ sector_t nr_sectors;
+ sector_t sector = 0;
+ struct blk_zone *zones = NULL;
+ unsigned int i, nreported = 0, nr_zones;
+ unsigned int zone_sectors;
+ int ret;
+
+ if (!bdev_is_zoned(bdev))
+ return 0;
+
+ if (device->zone_info)
+ return 0;
+
+ zone_info = kzalloc(sizeof(*zone_info), GFP_KERNEL);
+ if (!zone_info)
+ return -ENOMEM;
+
+ nr_sectors = bdev->bd_part->nr_sects;
+ zone_sectors = bdev_zone_sectors(bdev);
+ /* Check if it's power of 2 (see is_power_of_2) */
+ ASSERT(zone_sectors != 0 && (zone_sectors & (zone_sectors - 1)) == 0);
+ zone_info->zone_size = zone_sectors << SECTOR_SHIFT;
+ 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++;
+
+ 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;
+ }
+
+ zones = kcalloc(BTRFS_REPORT_NR_ZONES, sizeof(struct blk_zone), GFP_KERNEL);
+ if (!zones) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ /* Get zones type */
+ 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);
+ if (zones[i].cond == BLK_ZONE_COND_EMPTY)
+ __set_bit(nreported, zone_info->empty_zones);
+ 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;
+ }
+
+ kfree(zones);
+
+ device->zone_info = zone_info;
+
+ /* device->fs_info is not safe to use for printing messages */
+ btrfs_info_in_rcu(NULL,
+ "host-%s zoned block device %s, %u zones of %llu bytes",
+ bdev_zoned_model(bdev) == BLK_ZONED_HM ? "managed" : "aware",
+ rcu_str_deref(device->name), zone_info->nr_zones,
+ zone_info->zone_size);
+
+ return 0;
+
+out:
+ kfree(zones);
+ bitmap_free(zone_info->empty_zones);
+ bitmap_free(zone_info->seq_zones);
+ kfree(zone_info);
+
+ 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->seq_zones);
+ bitmap_free(zone_info->empty_zones);
+ kfree(zone_info);
+ device->zone_info = NULL;
+}
+
+int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos,
+ struct blk_zone *zone)
+{
+ unsigned int nr_zones = 1;
+ int ret;
+
+ ret = btrfs_get_dev_zones(device, pos, zone, &nr_zones);
+ if (ret != 0 || !nr_zones)
+ return ret ? ret : -EIO;
+
+ return 0;
+}
diff --git a/fs/btrfs/zoned.h b/fs/btrfs/zoned.h
new file mode 100644
index 000000000000..00c871f09d03
--- /dev/null
+++ b/fs/btrfs/zoned.h
@@ -0,0 +1,87 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef BTRFS_ZONED_H
+#define BTRFS_ZONED_H
+
+#include <linux/types.h>
+
+struct btrfs_zoned_device_info {
+ /*
+ * Number of zones, zone size and types of zones if bdev is a
+ * zoned block device.
+ */
+ u64 zone_size;
+ u8 zone_size_shift;
+ u32 nr_zones;
+ unsigned long *seq_zones;
+ unsigned long *empty_zones;
+};
+
+#ifdef CONFIG_BLK_DEV_ZONED
+int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos,
+ struct blk_zone *zone);
+int btrfs_get_dev_zone_info(struct btrfs_device *device);
+void btrfs_destroy_dev_zone_info(struct btrfs_device *device);
+#else /* CONFIG_BLK_DEV_ZONED */
+static inline int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos,
+ struct blk_zone *zone)
+{
+ return 0;
+}
+
+static inline int btrfs_get_dev_zone_info(struct btrfs_device *device)
+{
+ return 0;
+}
+
+static inline void btrfs_destroy_dev_zone_info(struct btrfs_device *device) { }
+
+#endif
+
+static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos)
+{
+ struct btrfs_zoned_device_info *zone_info = device->zone_info;
+
+ if (!zone_info)
+ return false;
+
+ return test_bit(pos >> zone_info->zone_size_shift, zone_info->seq_zones);
+}
+
+static inline bool btrfs_dev_is_empty_zone(struct btrfs_device *device, u64 pos)
+{
+ struct btrfs_zoned_device_info *zone_info = device->zone_info;
+
+ if (!zone_info)
+ return true;
+
+ return test_bit(pos >> zone_info->zone_size_shift, zone_info->empty_zones);
+}
+
+static inline void btrfs_dev_set_empty_zone_bit(struct btrfs_device *device,
+ u64 pos, bool set)
+{
+ struct btrfs_zoned_device_info *zone_info = device->zone_info;
+ unsigned int zno;
+
+ if (!zone_info)
+ return;
+
+ zno = pos >> zone_info->zone_size_shift;
+ if (set)
+ set_bit(zno, zone_info->empty_zones);
+ else
+ clear_bit(zno, zone_info->empty_zones);
+}
+
+static inline void btrfs_dev_set_zone_empty(struct btrfs_device *device, u64 pos)
+{
+ btrfs_dev_set_empty_zone_bit(device, pos, true);
+}
+
+static inline void btrfs_dev_clear_zone_empty(struct btrfs_device *device, u64 pos)
+{
+ btrfs_dev_set_empty_zone_bit(device, pos, false);
+}
+
+#endif
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-07 15:50:46 +0300