diff options
author | Naohiro Aota <naohiro.aota@wdc.com> | 2020-02-25 12:56:14 +0900 |
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committer | David Sterba <dsterba@suse.com> | 2020-03-23 17:01:49 +0100 |
commit | dce580ca403a3e99806a39d54bcb0ad631dee01f (patch) | |
tree | e8feabe29423a919c0c9fb06b149f01f551404c7 /fs/btrfs/volumes.c | |
parent | 5badf512ecd0530fbb517c999fccacf6a9d87dc1 (diff) | |
download | linux-dce580ca403a3e99806a39d54bcb0ad631dee01f.tar.bz2 |
btrfs: factor out create_chunk()
Factor out create_chunk() from __btrfs_alloc_chunk(). This function
finally creates a chunk. There is no functional changes.
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>
Diffstat (limited to 'fs/btrfs/volumes.c')
-rw-r--r-- | fs/btrfs/volumes.c | 132 |
1 files changed, 71 insertions, 61 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 6309a73d100a..888009bbec8f 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -5019,91 +5019,53 @@ static int decide_stripe_size(struct btrfs_fs_devices *fs_devices, } } -static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans, - u64 start, u64 type) +static int create_chunk(struct btrfs_trans_handle *trans, + struct alloc_chunk_ctl *ctl, + struct btrfs_device_info *devices_info) { struct btrfs_fs_info *info = trans->fs_info; - struct btrfs_fs_devices *fs_devices = info->fs_devices; struct map_lookup *map = NULL; struct extent_map_tree *em_tree; struct extent_map *em; - struct btrfs_device_info *devices_info = NULL; - struct alloc_chunk_ctl ctl; + u64 start = ctl->start; + u64 type = ctl->type; int ret; int i; int j; - if (!alloc_profile_is_valid(type, 0)) { - ASSERT(0); - return -EINVAL; - } - - if (list_empty(&fs_devices->alloc_list)) { - if (btrfs_test_opt(info, ENOSPC_DEBUG)) - btrfs_debug(info, "%s: no writable device", __func__); - return -ENOSPC; - } - - if (!(type & BTRFS_BLOCK_GROUP_TYPE_MASK)) { - btrfs_err(info, "invalid chunk type 0x%llx requested", type); - ASSERT(0); - return -EINVAL; - } - - ctl.start = start; - ctl.type = type; - init_alloc_chunk_ctl(fs_devices, &ctl); - - devices_info = kcalloc(fs_devices->rw_devices, sizeof(*devices_info), - GFP_NOFS); - if (!devices_info) + map = kmalloc(map_lookup_size(ctl->num_stripes), GFP_NOFS); + if (!map) return -ENOMEM; + map->num_stripes = ctl->num_stripes; - ret = gather_device_info(fs_devices, &ctl, devices_info); - if (ret < 0) - goto error; - - ret = decide_stripe_size(fs_devices, &ctl, devices_info); - if (ret < 0) - goto error; - - map = kmalloc(map_lookup_size(ctl.num_stripes), GFP_NOFS); - if (!map) { - ret = -ENOMEM; - goto error; - } - - map->num_stripes = ctl.num_stripes; - - for (i = 0; i < ctl.ndevs; ++i) { - for (j = 0; j < ctl.dev_stripes; ++j) { - int s = i * ctl.dev_stripes + j; + for (i = 0; i < ctl->ndevs; ++i) { + for (j = 0; j < ctl->dev_stripes; ++j) { + int s = i * ctl->dev_stripes + j; map->stripes[s].dev = devices_info[i].dev; map->stripes[s].physical = devices_info[i].dev_offset + - j * ctl.stripe_size; + j * ctl->stripe_size; } } map->stripe_len = BTRFS_STRIPE_LEN; map->io_align = BTRFS_STRIPE_LEN; map->io_width = BTRFS_STRIPE_LEN; map->type = type; - map->sub_stripes = ctl.sub_stripes; + map->sub_stripes = ctl->sub_stripes; - trace_btrfs_chunk_alloc(info, map, start, ctl.chunk_size); + trace_btrfs_chunk_alloc(info, map, start, ctl->chunk_size); em = alloc_extent_map(); if (!em) { kfree(map); - ret = -ENOMEM; - goto error; + return -ENOMEM; } set_bit(EXTENT_FLAG_FS_MAPPING, &em->flags); em->map_lookup = map; em->start = start; - em->len = ctl.chunk_size; + em->len = ctl->chunk_size; em->block_start = 0; em->block_len = em->len; - em->orig_block_len = ctl.stripe_size; + em->orig_block_len = ctl->stripe_size; em_tree = &info->mapping_tree; write_lock(&em_tree->lock); @@ -5111,11 +5073,11 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans, if (ret) { write_unlock(&em_tree->lock); free_extent_map(em); - goto error; + return ret; } write_unlock(&em_tree->lock); - ret = btrfs_make_block_group(trans, 0, type, start, ctl.chunk_size); + ret = btrfs_make_block_group(trans, 0, type, start, ctl->chunk_size); if (ret) goto error_del_extent; @@ -5123,20 +5085,19 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans, struct btrfs_device *dev = map->stripes[i].dev; btrfs_device_set_bytes_used(dev, - dev->bytes_used + ctl.stripe_size); + dev->bytes_used + ctl->stripe_size); if (list_empty(&dev->post_commit_list)) list_add_tail(&dev->post_commit_list, &trans->transaction->dev_update_list); } - atomic64_sub(ctl.stripe_size * map->num_stripes, + atomic64_sub(ctl->stripe_size * map->num_stripes, &info->free_chunk_space); free_extent_map(em); check_raid56_incompat_flag(info, type); check_raid1c34_incompat_flag(info, type); - kfree(devices_info); return 0; error_del_extent: @@ -5148,7 +5109,56 @@ error_del_extent: free_extent_map(em); /* One for the tree reference */ free_extent_map(em); -error: + + return ret; +} + +static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans, + u64 start, u64 type) +{ + struct btrfs_fs_info *info = trans->fs_info; + struct btrfs_fs_devices *fs_devices = info->fs_devices; + struct btrfs_device_info *devices_info = NULL; + struct alloc_chunk_ctl ctl; + int ret; + + if (!alloc_profile_is_valid(type, 0)) { + ASSERT(0); + return -EINVAL; + } + + if (list_empty(&fs_devices->alloc_list)) { + if (btrfs_test_opt(info, ENOSPC_DEBUG)) + btrfs_debug(info, "%s: no writable device", __func__); + return -ENOSPC; + } + + if (!(type & BTRFS_BLOCK_GROUP_TYPE_MASK)) { + btrfs_err(info, "invalid chunk type 0x%llx requested", type); + ASSERT(0); + return -EINVAL; + } + + ctl.start = start; + ctl.type = type; + init_alloc_chunk_ctl(fs_devices, &ctl); + + devices_info = kcalloc(fs_devices->rw_devices, sizeof(*devices_info), + GFP_NOFS); + if (!devices_info) + return -ENOMEM; + + ret = gather_device_info(fs_devices, &ctl, devices_info); + if (ret < 0) + goto out; + + ret = decide_stripe_size(fs_devices, &ctl, devices_info); + if (ret < 0) + goto out; + + ret = create_chunk(trans, &ctl, devices_info); + +out: kfree(devices_info); return ret; } |