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btrfs: refactor btrfs_find_device() take fs_devices as argument 

btrfs_find_device() accepts fs_info as an argument and retrieves
fs_devices from fs_info.

Instead use fs_devices, so that this function can be used in non-mount
(during device scanning) context as well.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Anand Jain 2019-01-17 23:32:31 +08:00 committed by David Sterba
parent 6e927cebe2
commit e4319cd9ca
5 changed files with 30 additions and 28 deletions
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6
fs/btrfs/dev-replace.c
View File

@ -111,9 +111,9 @@ no_valid_dev_replace_entry_found:
break;
case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED:
case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED:
dev_replace->srcdev = btrfs_find_device(fs_info, src_devid,
NULL, NULL);
dev_replace->tgtdev = btrfs_find_device(fs_info,
dev_replace->srcdev = btrfs_find_device(fs_info->fs_devices,
src_devid, NULL, NULL);
dev_replace->tgtdev = btrfs_find_device(fs_info->fs_devices,
BTRFS_DEV_REPLACE_DEVID,
NULL, NULL);
/*

5
fs/btrfs/ioctl.c
View File

@ -1642,7 +1642,7 @@ static noinline int btrfs_ioctl_resize(struct file *file,
btrfs_info(fs_info, "resizing devid %llu", devid);
}
device = btrfs_find_device(fs_info, devid, NULL, NULL);
device = btrfs_find_device(fs_info->fs_devices, devid, NULL, NULL);
if (!device) {
btrfs_info(fs_info, "resizer unable to find device %llu",
devid);
@ -3178,7 +3178,8 @@ static long btrfs_ioctl_dev_info(struct btrfs_fs_info *fs_info,
s_uuid = di_args->uuid;
rcu_read_lock();
dev = btrfs_find_device(fs_info, di_args->devid, s_uuid, NULL);
dev = btrfs_find_device(fs_info->fs_devices, di_args->devid, s_uuid,
NULL);
if (!dev) {
ret = -ENODEV;

4
fs/btrfs/scrub.c
View File

@ -3835,7 +3835,7 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
return PTR_ERR(sctx);
mutex_lock(&fs_info->fs_devices->device_list_mutex);
dev = btrfs_find_device(fs_info, devid, NULL, NULL);
dev = btrfs_find_device(fs_info->fs_devices, devid, NULL, NULL);
if (!dev || (test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state) &&
!is_dev_replace)) {
mutex_unlock(&fs_info->fs_devices->device_list_mutex);
@ -4012,7 +4012,7 @@ int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
struct scrub_ctx *sctx = NULL;
mutex_lock(&fs_info->fs_devices->device_list_mutex);
dev = btrfs_find_device(fs_info, devid, NULL, NULL);
dev = btrfs_find_device(fs_info->fs_devices, devid, NULL, NULL);
if (dev)
sctx = dev->scrub_ctx;
if (sctx)

39
fs/btrfs/volumes.c
View File

@ -2385,11 +2385,11 @@ static struct btrfs_device *btrfs_find_device_by_path(
devid = btrfs_stack_device_id(&disk_super->dev_item);
dev_uuid = disk_super->dev_item.uuid;
if (btrfs_fs_incompat(fs_info, METADATA_UUID))
device = btrfs_find_device(fs_info, devid, dev_uuid,
disk_super->metadata_uuid);
device = btrfs_find_device(fs_info->fs_devices, devid, dev_uuid,
disk_super->metadata_uuid);
else
device = btrfs_find_device(fs_info, devid,
dev_uuid, disk_super->fsid);
device = btrfs_find_device(fs_info->fs_devices, devid, dev_uuid,
disk_super->fsid);
brelse(bh);
if (!device)
@ -2408,7 +2408,8 @@ struct btrfs_device *btrfs_find_device_by_devspec(
struct btrfs_device *device;
if (devid) {
device = btrfs_find_device(fs_info, devid, NULL, NULL);
device = btrfs_find_device(fs_info->fs_devices, devid, NULL,
NULL);
if (!device)
return ERR_PTR(-ENOENT);
return device;
@ -2550,7 +2551,8 @@ next_slot:
BTRFS_UUID_SIZE);
read_extent_buffer(leaf, fs_uuid, btrfs_device_fsid(dev_item),
BTRFS_FSID_SIZE);
device = btrfs_find_device(fs_info, devid, dev_uuid, fs_uuid);
device = btrfs_find_device(fs_info->fs_devices, devid, dev_uuid,
fs_uuid);
BUG_ON(!device); /* Logic error */
if (device->fs_devices->seeding) {
@ -6603,21 +6605,19 @@ blk_status_t btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
return BLK_STS_OK;
}
struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid,
u8 *uuid, u8 *fsid)
struct btrfs_device *btrfs_find_device(struct btrfs_fs_devices *fs_devices,
u64 devid, u8 *uuid, u8 *fsid)
{
struct btrfs_device *device;
struct btrfs_fs_devices *cur_devices;
cur_devices = fs_info->fs_devices;
while (cur_devices) {
while (fs_devices) {
if (!fsid ||
!memcmp(cur_devices->metadata_uuid, fsid, BTRFS_FSID_SIZE)) {
device = find_device(cur_devices, devid, uuid);
!memcmp(fs_devices->metadata_uuid, fsid, BTRFS_FSID_SIZE)) {
device = find_device(fs_devices, devid, uuid);
if (device)
return device;
}
cur_devices = cur_devices->seed;
fs_devices = fs_devices->seed;
}
return NULL;
}
@ -6862,8 +6862,8 @@ static int read_one_chunk(struct btrfs_fs_info *fs_info, struct btrfs_key *key,
read_extent_buffer(leaf, uuid, (unsigned long)
btrfs_stripe_dev_uuid_nr(chunk, i),
BTRFS_UUID_SIZE);
map->stripes[i].dev = btrfs_find_device(fs_info, devid,
uuid, NULL);
map->stripes[i].dev = btrfs_find_device(fs_info->fs_devices,
devid, uuid, NULL);
if (!map->stripes[i].dev &&
!btrfs_test_opt(fs_info, DEGRADED)) {
free_extent_map(em);
@ -7002,7 +7002,8 @@ static int read_one_dev(struct btrfs_fs_info *fs_info,
return PTR_ERR(fs_devices);
}
device = btrfs_find_device(fs_info, devid, dev_uuid, fs_uuid);
device = btrfs_find_device(fs_info->fs_devices, devid, dev_uuid,
fs_uuid);
if (!device) {
if (!btrfs_test_opt(fs_info, DEGRADED)) {
btrfs_report_missing_device(fs_info, devid,
@ -7592,7 +7593,7 @@ int btrfs_get_dev_stats(struct btrfs_fs_info *fs_info,
int i;
mutex_lock(&fs_devices->device_list_mutex);
dev = btrfs_find_device(fs_info, stats->devid, NULL, NULL);
dev = btrfs_find_device(fs_info->fs_devices, stats->devid, NULL, NULL);
mutex_unlock(&fs_devices->device_list_mutex);
if (!dev) {
@ -7806,7 +7807,7 @@ static int verify_one_dev_extent(struct btrfs_fs_info *fs_info,
}
/* Make sure no dev extent is beyond device bondary */
dev = btrfs_find_device(fs_info, devid, NULL, NULL);
dev = btrfs_find_device(fs_info->fs_devices, devid, NULL, NULL);
if (!dev) {
btrfs_err(fs_info, "failed to find devid %llu", devid);
ret = -EUCLEAN;

4
fs/btrfs/volumes.h
View File

@ -433,8 +433,8 @@ void __exit btrfs_cleanup_fs_uuids(void);
int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len);
int btrfs_grow_device(struct btrfs_trans_handle *trans,
struct btrfs_device *device, u64 new_size);
struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid,
u8 *uuid, u8 *fsid);
struct btrfs_device *btrfs_find_device(struct btrfs_fs_devices *fs_devices,
u64 devid, u8 *uuid, u8 *fsid);
int btrfs_shrink_device(struct btrfs_device *device, u64 new_size);
int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *path);
int btrfs_balance(struct btrfs_fs_info *fs_info,