diff options
author | Josef Bacik <josef@toxicpanda.com> | 2019-06-19 19:47:23 +0200 |
---|---|---|
committer | David Sterba <dsterba@suse.com> | 2019-07-02 12:30:55 +0200 |
commit | 67f9c2209e885c8f97215655739155c94ca9cb9c (patch) | |
tree | db366b452a1f98471c1a44962820f31285e48d1c /fs | |
parent | btrfs: migrate the block-rsv code to block-rsv.c (diff) | |
download | linux-67f9c2209e885c8f97215655739155c94ca9cb9c.tar.xz linux-67f9c2209e885c8f97215655739155c94ca9cb9c.zip |
btrfs: migrate the global_block_rsv helpers to block-rsv.c
These helpers belong in block-rsv.c
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/btrfs/block-rsv.c | 172 | ||||
-rw-r--r-- | fs/btrfs/block-rsv.h | 15 | ||||
-rw-r--r-- | fs/btrfs/extent-tree.c | 189 |
3 files changed, 193 insertions, 183 deletions
diff --git a/fs/btrfs/block-rsv.c b/fs/btrfs/block-rsv.c index 250c383308f9..698470b9f32d 100644 --- a/fs/btrfs/block-rsv.c +++ b/fs/btrfs/block-rsv.c @@ -4,6 +4,7 @@ #include "block-rsv.h" #include "space-info.h" #include "math.h" +#include "transaction.h" static u64 block_rsv_release_bytes(struct btrfs_fs_info *fs_info, struct btrfs_block_rsv *block_rsv, @@ -251,3 +252,174 @@ int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info, btrfs_block_rsv_add_bytes(dest, num_bytes, true); return 0; } + +void btrfs_update_global_block_rsv(struct btrfs_fs_info *fs_info) +{ + struct btrfs_block_rsv *block_rsv = &fs_info->global_block_rsv; + struct btrfs_space_info *sinfo = block_rsv->space_info; + u64 num_bytes; + + /* + * The global block rsv is based on the size of the extent tree, the + * checksum tree and the root tree. If the fs is empty we want to set + * it to a minimal amount for safety. + */ + num_bytes = btrfs_root_used(&fs_info->extent_root->root_item) + + btrfs_root_used(&fs_info->csum_root->root_item) + + btrfs_root_used(&fs_info->tree_root->root_item); + num_bytes = max_t(u64, num_bytes, SZ_16M); + + spin_lock(&sinfo->lock); + spin_lock(&block_rsv->lock); + + block_rsv->size = min_t(u64, num_bytes, SZ_512M); + + if (block_rsv->reserved < block_rsv->size) { + num_bytes = btrfs_space_info_used(sinfo, true); + if (sinfo->total_bytes > num_bytes) { + num_bytes = sinfo->total_bytes - num_bytes; + num_bytes = min(num_bytes, + block_rsv->size - block_rsv->reserved); + block_rsv->reserved += num_bytes; + btrfs_space_info_update_bytes_may_use(fs_info, sinfo, + num_bytes); + trace_btrfs_space_reservation(fs_info, "space_info", + sinfo->flags, num_bytes, + 1); + } + } else if (block_rsv->reserved > block_rsv->size) { + num_bytes = block_rsv->reserved - block_rsv->size; + btrfs_space_info_update_bytes_may_use(fs_info, sinfo, + -num_bytes); + trace_btrfs_space_reservation(fs_info, "space_info", + sinfo->flags, num_bytes, 0); + block_rsv->reserved = block_rsv->size; + } + + if (block_rsv->reserved == block_rsv->size) + block_rsv->full = 1; + else + block_rsv->full = 0; + + spin_unlock(&block_rsv->lock); + spin_unlock(&sinfo->lock); +} + +void btrfs_init_global_block_rsv(struct btrfs_fs_info *fs_info) +{ + struct btrfs_space_info *space_info; + + space_info = btrfs_find_space_info(fs_info, BTRFS_BLOCK_GROUP_SYSTEM); + fs_info->chunk_block_rsv.space_info = space_info; + + space_info = btrfs_find_space_info(fs_info, BTRFS_BLOCK_GROUP_METADATA); + fs_info->global_block_rsv.space_info = space_info; + fs_info->trans_block_rsv.space_info = space_info; + fs_info->empty_block_rsv.space_info = space_info; + fs_info->delayed_block_rsv.space_info = space_info; + fs_info->delayed_refs_rsv.space_info = space_info; + + fs_info->extent_root->block_rsv = &fs_info->delayed_refs_rsv; + fs_info->csum_root->block_rsv = &fs_info->delayed_refs_rsv; + fs_info->dev_root->block_rsv = &fs_info->global_block_rsv; + fs_info->tree_root->block_rsv = &fs_info->global_block_rsv; + if (fs_info->quota_root) + fs_info->quota_root->block_rsv = &fs_info->global_block_rsv; + fs_info->chunk_root->block_rsv = &fs_info->chunk_block_rsv; + + btrfs_update_global_block_rsv(fs_info); +} + +void btrfs_release_global_block_rsv(struct btrfs_fs_info *fs_info) +{ + btrfs_block_rsv_release(fs_info, &fs_info->global_block_rsv, (u64)-1); + WARN_ON(fs_info->trans_block_rsv.size > 0); + WARN_ON(fs_info->trans_block_rsv.reserved > 0); + WARN_ON(fs_info->chunk_block_rsv.size > 0); + WARN_ON(fs_info->chunk_block_rsv.reserved > 0); + WARN_ON(fs_info->delayed_block_rsv.size > 0); + WARN_ON(fs_info->delayed_block_rsv.reserved > 0); + WARN_ON(fs_info->delayed_refs_rsv.reserved > 0); + WARN_ON(fs_info->delayed_refs_rsv.size > 0); +} + +static struct btrfs_block_rsv *get_block_rsv( + const struct btrfs_trans_handle *trans, + const struct btrfs_root *root) +{ + struct btrfs_fs_info *fs_info = root->fs_info; + struct btrfs_block_rsv *block_rsv = NULL; + + if (test_bit(BTRFS_ROOT_REF_COWS, &root->state) || + (root == fs_info->csum_root && trans->adding_csums) || + (root == fs_info->uuid_root)) + block_rsv = trans->block_rsv; + + if (!block_rsv) + block_rsv = root->block_rsv; + + if (!block_rsv) + block_rsv = &fs_info->empty_block_rsv; + + return block_rsv; +} + +struct btrfs_block_rsv *btrfs_use_block_rsv(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + u32 blocksize) +{ + struct btrfs_fs_info *fs_info = root->fs_info; + struct btrfs_block_rsv *block_rsv; + struct btrfs_block_rsv *global_rsv = &fs_info->global_block_rsv; + int ret; + bool global_updated = false; + + block_rsv = get_block_rsv(trans, root); + + if (unlikely(block_rsv->size == 0)) + goto try_reserve; +again: + ret = btrfs_block_rsv_use_bytes(block_rsv, blocksize); + if (!ret) + return block_rsv; + + if (block_rsv->failfast) + return ERR_PTR(ret); + + if (block_rsv->type == BTRFS_BLOCK_RSV_GLOBAL && !global_updated) { + global_updated = true; + btrfs_update_global_block_rsv(fs_info); + goto again; + } + + /* + * The global reserve still exists to save us from ourselves, so don't + * warn_on if we are short on our delayed refs reserve. + */ + if (block_rsv->type != BTRFS_BLOCK_RSV_DELREFS && + btrfs_test_opt(fs_info, ENOSPC_DEBUG)) { + static DEFINE_RATELIMIT_STATE(_rs, + DEFAULT_RATELIMIT_INTERVAL * 10, + /*DEFAULT_RATELIMIT_BURST*/ 1); + if (__ratelimit(&_rs)) + WARN(1, KERN_DEBUG + "BTRFS: block rsv returned %d\n", ret); + } +try_reserve: + ret = btrfs_reserve_metadata_bytes(root, block_rsv, blocksize, + BTRFS_RESERVE_NO_FLUSH); + if (!ret) + return block_rsv; + /* + * If we couldn't reserve metadata bytes try and use some from + * the global reserve if its space type is the same as the global + * reservation. + */ + if (block_rsv->type != BTRFS_BLOCK_RSV_GLOBAL && + block_rsv->space_info == global_rsv->space_info) { + ret = btrfs_block_rsv_use_bytes(global_rsv, blocksize); + if (!ret) + return global_rsv; + } + return ERR_PTR(ret); +} diff --git a/fs/btrfs/block-rsv.h b/fs/btrfs/block-rsv.h index feb0a4d4b1c9..d1428bb73fc5 100644 --- a/fs/btrfs/block-rsv.h +++ b/fs/btrfs/block-rsv.h @@ -3,6 +3,7 @@ #ifndef BTRFS_BLOCK_RSV_H #define BTRFS_BLOCK_RSV_H +struct btrfs_trans_handle; enum btrfs_reserve_flush_enum; /* @@ -75,6 +76,12 @@ void btrfs_block_rsv_add_bytes(struct btrfs_block_rsv *block_rsv, u64 __btrfs_block_rsv_release(struct btrfs_fs_info *fs_info, struct btrfs_block_rsv *block_rsv, u64 num_bytes, u64 *qgroup_to_release); +void btrfs_update_global_block_rsv(struct btrfs_fs_info *fs_info); +void btrfs_init_global_block_rsv(struct btrfs_fs_info *fs_info); +void btrfs_release_global_block_rsv(struct btrfs_fs_info *fs_info); +struct btrfs_block_rsv *btrfs_use_block_rsv(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + u32 blocksize); static inline void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info, struct btrfs_block_rsv *block_rsv, @@ -83,4 +90,12 @@ static inline void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info, __btrfs_block_rsv_release(fs_info, block_rsv, num_bytes, NULL); } +static inline void btrfs_unuse_block_rsv(struct btrfs_fs_info *fs_info, + struct btrfs_block_rsv *block_rsv, + u32 blocksize) +{ + btrfs_block_rsv_add_bytes(block_rsv, blocksize, false); + btrfs_block_rsv_release(fs_info, block_rsv, 0); +} + #endif /* BTRFS_BLOCK_RSV_H */ diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 668a61724e89..ad05d8011dcc 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -4347,27 +4347,6 @@ out: return ret; } -static struct btrfs_block_rsv *get_block_rsv( - const struct btrfs_trans_handle *trans, - const struct btrfs_root *root) -{ - struct btrfs_fs_info *fs_info = root->fs_info; - struct btrfs_block_rsv *block_rsv = NULL; - - if (test_bit(BTRFS_ROOT_REF_COWS, &root->state) || - (root == fs_info->csum_root && trans->adding_csums) || - (root == fs_info->uuid_root)) - block_rsv = trans->block_rsv; - - if (!block_rsv) - block_rsv = root->block_rsv; - - if (!block_rsv) - block_rsv = &fs_info->empty_block_rsv; - - return block_rsv; -} - /** * btrfs_migrate_to_delayed_refs_rsv - transfer bytes to our delayed refs rsv. * @fs_info - the fs info for our fs. @@ -4508,95 +4487,6 @@ void btrfs_delayed_refs_rsv_release(struct btrfs_fs_info *fs_info, int nr) 0, released, 0); } -static void update_global_block_rsv(struct btrfs_fs_info *fs_info) -{ - struct btrfs_block_rsv *block_rsv = &fs_info->global_block_rsv; - struct btrfs_space_info *sinfo = block_rsv->space_info; - u64 num_bytes; - - /* - * The global block rsv is based on the size of the extent tree, the - * checksum tree and the root tree. If the fs is empty we want to set - * it to a minimal amount for safety. - */ - num_bytes = btrfs_root_used(&fs_info->extent_root->root_item) + - btrfs_root_used(&fs_info->csum_root->root_item) + - btrfs_root_used(&fs_info->tree_root->root_item); - num_bytes = max_t(u64, num_bytes, SZ_16M); - - spin_lock(&sinfo->lock); - spin_lock(&block_rsv->lock); - - block_rsv->size = min_t(u64, num_bytes, SZ_512M); - - if (block_rsv->reserved < block_rsv->size) { - num_bytes = btrfs_space_info_used(sinfo, true); - if (sinfo->total_bytes > num_bytes) { - num_bytes = sinfo->total_bytes - num_bytes; - num_bytes = min(num_bytes, - block_rsv->size - block_rsv->reserved); - block_rsv->reserved += num_bytes; - btrfs_space_info_update_bytes_may_use(fs_info, sinfo, - num_bytes); - trace_btrfs_space_reservation(fs_info, "space_info", - sinfo->flags, num_bytes, - 1); - } - } else if (block_rsv->reserved > block_rsv->size) { - num_bytes = block_rsv->reserved - block_rsv->size; - btrfs_space_info_update_bytes_may_use(fs_info, sinfo, - -num_bytes); - trace_btrfs_space_reservation(fs_info, "space_info", - sinfo->flags, num_bytes, 0); - block_rsv->reserved = block_rsv->size; - } - - if (block_rsv->reserved == block_rsv->size) - block_rsv->full = 1; - else - block_rsv->full = 0; - - spin_unlock(&block_rsv->lock); - spin_unlock(&sinfo->lock); -} - -static void init_global_block_rsv(struct btrfs_fs_info *fs_info) -{ - struct btrfs_space_info *space_info; - - space_info = btrfs_find_space_info(fs_info, BTRFS_BLOCK_GROUP_SYSTEM); - fs_info->chunk_block_rsv.space_info = space_info; - - space_info = btrfs_find_space_info(fs_info, BTRFS_BLOCK_GROUP_METADATA); - fs_info->global_block_rsv.space_info = space_info; - fs_info->trans_block_rsv.space_info = space_info; - fs_info->empty_block_rsv.space_info = space_info; - fs_info->delayed_block_rsv.space_info = space_info; - fs_info->delayed_refs_rsv.space_info = space_info; - - fs_info->extent_root->block_rsv = &fs_info->delayed_refs_rsv; - fs_info->csum_root->block_rsv = &fs_info->delayed_refs_rsv; - fs_info->dev_root->block_rsv = &fs_info->global_block_rsv; - fs_info->tree_root->block_rsv = &fs_info->global_block_rsv; - if (fs_info->quota_root) - fs_info->quota_root->block_rsv = &fs_info->global_block_rsv; - fs_info->chunk_root->block_rsv = &fs_info->chunk_block_rsv; - - update_global_block_rsv(fs_info); -} - -static void release_global_block_rsv(struct btrfs_fs_info *fs_info) -{ - btrfs_block_rsv_release(fs_info, &fs_info->global_block_rsv, (u64)-1); - WARN_ON(fs_info->trans_block_rsv.size > 0); - WARN_ON(fs_info->trans_block_rsv.reserved > 0); - WARN_ON(fs_info->chunk_block_rsv.size > 0); - WARN_ON(fs_info->chunk_block_rsv.reserved > 0); - WARN_ON(fs_info->delayed_block_rsv.size > 0); - WARN_ON(fs_info->delayed_block_rsv.reserved > 0); - WARN_ON(fs_info->delayed_refs_rsv.reserved > 0); - WARN_ON(fs_info->delayed_refs_rsv.size > 0); -} /* * btrfs_update_delayed_refs_rsv - adjust the size of the delayed refs rsv @@ -5360,7 +5250,7 @@ void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info) up_write(&fs_info->commit_root_sem); - update_global_block_rsv(fs_info); + btrfs_update_global_block_rsv(fs_info); } /* @@ -7117,73 +7007,6 @@ btrfs_init_new_buffer(struct btrfs_trans_handle *trans, struct btrfs_root *root, return buf; } -static struct btrfs_block_rsv * -use_block_rsv(struct btrfs_trans_handle *trans, - struct btrfs_root *root, u32 blocksize) -{ - struct btrfs_fs_info *fs_info = root->fs_info; - struct btrfs_block_rsv *block_rsv; - struct btrfs_block_rsv *global_rsv = &fs_info->global_block_rsv; - int ret; - bool global_updated = false; - - block_rsv = get_block_rsv(trans, root); - - if (unlikely(block_rsv->size == 0)) - goto try_reserve; -again: - ret = btrfs_block_rsv_use_bytes(block_rsv, blocksize); - if (!ret) - return block_rsv; - - if (block_rsv->failfast) - return ERR_PTR(ret); - - if (block_rsv->type == BTRFS_BLOCK_RSV_GLOBAL && !global_updated) { - global_updated = true; - update_global_block_rsv(fs_info); - goto again; - } - - /* - * The global reserve still exists to save us from ourselves, so don't - * warn_on if we are short on our delayed refs reserve. - */ - if (block_rsv->type != BTRFS_BLOCK_RSV_DELREFS && - btrfs_test_opt(fs_info, ENOSPC_DEBUG)) { - static DEFINE_RATELIMIT_STATE(_rs, - DEFAULT_RATELIMIT_INTERVAL * 10, - /*DEFAULT_RATELIMIT_BURST*/ 1); - if (__ratelimit(&_rs)) - WARN(1, KERN_DEBUG - "BTRFS: block rsv returned %d\n", ret); - } -try_reserve: - ret = btrfs_reserve_metadata_bytes(root, block_rsv, blocksize, - BTRFS_RESERVE_NO_FLUSH); - if (!ret) - return block_rsv; - /* - * If we couldn't reserve metadata bytes try and use some from - * the global reserve if its space type is the same as the global - * reservation. - */ - if (block_rsv->type != BTRFS_BLOCK_RSV_GLOBAL && - block_rsv->space_info == global_rsv->space_info) { - ret = btrfs_block_rsv_use_bytes(global_rsv, blocksize); - if (!ret) - return global_rsv; - } - return ERR_PTR(ret); -} - -static void unuse_block_rsv(struct btrfs_fs_info *fs_info, - struct btrfs_block_rsv *block_rsv, u32 blocksize) -{ - btrfs_block_rsv_add_bytes(block_rsv, blocksize, false); - btrfs_block_rsv_release(fs_info, block_rsv, 0); -} - /* * finds a free extent and does all the dirty work required for allocation * returns the tree buffer or an ERR_PTR on error. @@ -7216,7 +7039,7 @@ struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, } #endif - block_rsv = use_block_rsv(trans, root, blocksize); + block_rsv = btrfs_use_block_rsv(trans, root, blocksize); if (IS_ERR(block_rsv)) return ERR_CAST(block_rsv); @@ -7274,7 +7097,7 @@ out_free_buf: out_free_reserved: btrfs_free_reserved_extent(fs_info, ins.objectid, ins.offset, 0); out_unuse: - unuse_block_rsv(fs_info, block_rsv, blocksize); + btrfs_unuse_block_rsv(fs_info, block_rsv, blocksize); return ERR_PTR(ret); } @@ -8761,7 +8584,7 @@ int btrfs_free_block_groups(struct btrfs_fs_info *info) */ synchronize_rcu(); - release_global_block_rsv(info); + btrfs_release_global_block_rsv(info); while (!list_empty(&info->space_info)) { int i; @@ -9113,7 +8936,7 @@ int btrfs_read_block_groups(struct btrfs_fs_info *info) } btrfs_add_raid_kobjects(info); - init_global_block_rsv(info); + btrfs_init_global_block_rsv(info); ret = check_chunk_block_group_mappings(info); error: btrfs_free_path(path); @@ -9227,7 +9050,7 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans, u64 bytes_used, trace_btrfs_add_block_group(fs_info, cache, 1); btrfs_update_space_info(fs_info, cache->flags, size, bytes_used, cache->bytes_super, &cache->space_info); - update_global_block_rsv(fs_info); + btrfs_update_global_block_rsv(fs_info); link_block_group(cache); |