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Diffstat (limited to 'fs/btrfs/block-group.c')
-rw-r--r--fs/btrfs/block-group.c66
1 files changed, 39 insertions, 27 deletions
diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c
index ea8aaf36647e..c0f1d6818df7 100644
--- a/fs/btrfs/block-group.c
+++ b/fs/btrfs/block-group.c
@@ -1766,16 +1766,10 @@ static void link_block_group(struct btrfs_block_group *cache)
{
struct btrfs_space_info *space_info = cache->space_info;
int index = btrfs_bg_flags_to_raid_index(cache->flags);
- bool first = false;
down_write(&space_info->groups_sem);
- if (list_empty(&space_info->block_groups[index]))
- first = true;
list_add_tail(&cache->list, &space_info->block_groups[index]);
up_write(&space_info->groups_sem);
-
- if (first)
- btrfs_sysfs_add_block_group_type(cache);
}
static struct btrfs_block_group *btrfs_create_block_group_cache(
@@ -1873,7 +1867,7 @@ static int check_chunk_block_group_mappings(struct btrfs_fs_info *fs_info)
return ret;
}
-static int read_block_group_item(struct btrfs_block_group *cache,
+static void read_block_group_item(struct btrfs_block_group *cache,
struct btrfs_path *path,
const struct btrfs_key *key)
{
@@ -1887,8 +1881,6 @@ static int read_block_group_item(struct btrfs_block_group *cache,
sizeof(bgi));
cache->used = btrfs_stack_block_group_used(&bgi);
cache->flags = btrfs_stack_block_group_flags(&bgi);
-
- return 0;
}
static int read_one_block_group(struct btrfs_fs_info *info,
@@ -1907,9 +1899,7 @@ static int read_one_block_group(struct btrfs_fs_info *info,
if (!cache)
return -ENOMEM;
- ret = read_block_group_item(cache, path, key);
- if (ret < 0)
- goto error;
+ read_block_group_item(cache, path, key);
set_free_space_tree_thresholds(cache);
@@ -2035,8 +2025,18 @@ int btrfs_read_block_groups(struct btrfs_fs_info *info)
btrfs_release_path(path);
}
- rcu_read_lock();
- list_for_each_entry_rcu(space_info, &info->space_info, list) {
+ list_for_each_entry(space_info, &info->space_info, list) {
+ int i;
+
+ for (i = 0; i < BTRFS_NR_RAID_TYPES; i++) {
+ if (list_empty(&space_info->block_groups[i]))
+ continue;
+ cache = list_first_entry(&space_info->block_groups[i],
+ struct btrfs_block_group,
+ list);
+ btrfs_sysfs_add_block_group_type(cache);
+ }
+
if (!(btrfs_get_alloc_profile(info, space_info->flags) &
(BTRFS_BLOCK_GROUP_RAID10 |
BTRFS_BLOCK_GROUP_RAID1_MASK |
@@ -2056,7 +2056,6 @@ int btrfs_read_block_groups(struct btrfs_fs_info *info)
list)
inc_block_group_ro(cache, 1);
}
- rcu_read_unlock();
btrfs_init_global_block_rsv(info);
ret = check_chunk_block_group_mappings(info);
@@ -2097,12 +2096,16 @@ void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans)
return;
while (!list_empty(&trans->new_bgs)) {
+ int index;
+
block_group = list_first_entry(&trans->new_bgs,
struct btrfs_block_group,
bg_list);
if (ret)
goto next;
+ index = btrfs_bg_flags_to_raid_index(block_group->flags);
+
ret = insert_block_group_item(trans, block_group);
if (ret)
btrfs_abort_transaction(trans, ret);
@@ -2111,6 +2114,16 @@ void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans)
if (ret)
btrfs_abort_transaction(trans, ret);
add_block_group_free_space(trans, block_group);
+
+ /*
+ * If we restriped during balance, we may have added a new raid
+ * type, so now add the sysfs entries when it is safe to do so.
+ * We don't have to worry about locking here as it's handled in
+ * btrfs_sysfs_add_block_group_type.
+ */
+ if (block_group->space_info->block_group_kobjs[index] == NULL)
+ btrfs_sysfs_add_block_group_type(block_group);
+
/* Already aborted the transaction if it failed. */
next:
btrfs_delayed_refs_rsv_release(fs_info, 1);
@@ -2785,7 +2798,7 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans)
* finished yet (no block group item in the extent tree
* yet, etc). If this is the case, wait for all free
* space endio workers to finish and retry. This is a
- * a very rare case so no need for a more efficient and
+ * very rare case so no need for a more efficient and
* complex approach.
*/
if (ret == -ENOENT) {
@@ -2961,6 +2974,13 @@ int btrfs_add_reserved_bytes(struct btrfs_block_group *cache,
space_info, -ram_bytes);
if (delalloc)
cache->delalloc_bytes += num_bytes;
+
+ /*
+ * Compression can use less space than we reserved, so wake
+ * tickets if that happens
+ */
+ if (num_bytes < ram_bytes)
+ btrfs_try_granting_tickets(cache->fs_info, space_info);
}
spin_unlock(&cache->lock);
spin_unlock(&space_info->lock);
@@ -2994,6 +3014,8 @@ void btrfs_free_reserved_bytes(struct btrfs_block_group *cache,
if (delalloc)
cache->delalloc_bytes -= num_bytes;
spin_unlock(&cache->lock);
+
+ btrfs_try_granting_tickets(cache->fs_info, space_info);
spin_unlock(&space_info->lock);
}
@@ -3002,12 +3024,10 @@ static void force_metadata_allocation(struct btrfs_fs_info *info)
struct list_head *head = &info->space_info;
struct btrfs_space_info *found;
- rcu_read_lock();
- list_for_each_entry_rcu(found, head, list) {
+ list_for_each_entry(found, head, list) {
if (found->flags & BTRFS_BLOCK_GROUP_METADATA)
found->force_alloc = CHUNK_ALLOC_FORCE;
}
- rcu_read_unlock();
}
static int should_alloc_chunk(struct btrfs_fs_info *fs_info,
@@ -3338,14 +3358,6 @@ int btrfs_free_block_groups(struct btrfs_fs_info *info)
}
spin_unlock(&info->block_group_cache_lock);
- /*
- * Now that all the block groups are freed, go through and free all the
- * space_info structs. This is only called during the final stages of
- * unmount, and so we know nobody is using them. We call
- * synchronize_rcu() once before we start, just to be on the safe side.
- */
- synchronize_rcu();
-
btrfs_release_global_block_rsv(info);
while (!list_empty(&info->space_info)) {
generated by cgit v1.2.3 (git 2.39.0) at 2024-08-22 10:50:37 +0300