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Btrfs: kill the durable block rsv stuff

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This is confusing code and isn't used by anything anymore, so delete it.

Signed-off-by: Josef Bacik <josef@redhat.com>
This commit is contained in:
Josef Bacik 2011-08-05 10:25:38 -04:00
parent dba68306f3
commit 37be25bcb6
5 changed files with 17 additions and 101 deletions
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11
fs/btrfs/ctree.h
View File

@ -772,13 +772,10 @@ struct btrfs_space_info {
struct btrfs_block_rsv {
u64 size;
u64 reserved;
u64 freed[2];
struct btrfs_space_info *space_info;
struct list_head list;
spinlock_t lock;
atomic_t usage;
unsigned int priority:8;
unsigned int durable:1;
unsigned int refill_used:1;
unsigned int full:1;
};
@ -840,7 +837,6 @@ struct btrfs_block_group_cache {
spinlock_t lock;
u64 pinned;
u64 reserved;
u64 reserved_pinned;
u64 bytes_super;
u64 flags;
u64 sectorsize;
@ -919,11 +915,6 @@ struct btrfs_fs_info {
struct btrfs_block_rsv empty_block_rsv;
/* list of block reservations that cross multiple transactions */
struct list_head durable_block_rsv_list;
struct mutex durable_block_rsv_mutex;
u64 generation;
u64 last_trans_committed;
@ -2238,8 +2229,6 @@ void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
void btrfs_free_block_rsv(struct btrfs_root *root,
struct btrfs_block_rsv *rsv);
void btrfs_add_durable_block_rsv(struct btrfs_fs_info *fs_info,
struct btrfs_block_rsv *rsv);
int btrfs_block_rsv_add(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_block_rsv *block_rsv,

2
fs/btrfs/disk-io.c
View File

@ -1665,8 +1665,6 @@ struct btrfs_root *open_ctree(struct super_block *sb,
btrfs_init_block_rsv(&fs_info->trans_block_rsv);
btrfs_init_block_rsv(&fs_info->chunk_block_rsv);
btrfs_init_block_rsv(&fs_info->empty_block_rsv);
INIT_LIST_HEAD(&fs_info->durable_block_rsv_list);
mutex_init(&fs_info->durable_block_rsv_mutex);
atomic_set(&fs_info->nr_async_submits, 0);
atomic_set(&fs_info->async_delalloc_pages, 0);
atomic_set(&fs_info->async_submit_draining, 0);

100
fs/btrfs/extent-tree.c
View File

@ -121,7 +121,6 @@ void btrfs_put_block_group(struct btrfs_block_group_cache *cache)
if (atomic_dec_and_test(&cache->count)) {
WARN_ON(cache->pinned > 0);
WARN_ON(cache->reserved > 0);
WARN_ON(cache->reserved_pinned > 0);
kfree(cache->free_space_ctl);
kfree(cache);
}
@ -3662,7 +3661,6 @@ void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv)
spin_lock_init(&rsv->lock);
atomic_set(&rsv->usage, 1);
rsv->priority = 6;
INIT_LIST_HEAD(&rsv->list);
}
struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root)
@ -3685,25 +3683,10 @@ void btrfs_free_block_rsv(struct btrfs_root *root,
{
if (rsv && atomic_dec_and_test(&rsv->usage)) {
btrfs_block_rsv_release(root, rsv, (u64)-1);
if (!rsv->durable)
kfree(rsv);
kfree(rsv);
}
}
/*
* make the block_rsv struct be able to capture freed space.
* the captured space will re-add to the the block_rsv struct
* after transaction commit
*/
void btrfs_add_durable_block_rsv(struct btrfs_fs_info *fs_info,
struct btrfs_block_rsv *block_rsv)
{
block_rsv->durable = 1;
mutex_lock(&fs_info->durable_block_rsv_mutex);
list_add_tail(&block_rsv->list, &fs_info->durable_block_rsv_list);
mutex_unlock(&fs_info->durable_block_rsv_mutex);
}
int btrfs_block_rsv_add(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_block_rsv *block_rsv,
@ -3745,9 +3728,7 @@ int btrfs_block_rsv_check(struct btrfs_trans_handle *trans,
ret = 0;
} else {
num_bytes -= block_rsv->reserved;
if (block_rsv->durable &&
block_rsv->freed[0] + block_rsv->freed[1] >= num_bytes)
commit_trans = 1;
commit_trans = 1;
}
spin_unlock(&block_rsv->lock);
if (!ret)
@ -3763,8 +3744,18 @@ int btrfs_block_rsv_check(struct btrfs_trans_handle *trans,
}
if (commit_trans) {
struct btrfs_space_info *sinfo = block_rsv->space_info;
if (trans)
return -EAGAIN;
spin_lock(&sinfo->lock);
if (sinfo->bytes_pinned < num_bytes) {
spin_unlock(&sinfo->lock);
return -ENOSPC;
}
spin_unlock(&sinfo->lock);
trans = btrfs_join_transaction(root);
BUG_ON(IS_ERR(trans));
ret = btrfs_commit_transaction(trans, root);
@ -3885,10 +3876,6 @@ static void init_global_block_rsv(struct btrfs_fs_info *fs_info)
fs_info->tree_root->block_rsv = &fs_info->global_block_rsv;
fs_info->chunk_root->block_rsv = &fs_info->chunk_block_rsv;
btrfs_add_durable_block_rsv(fs_info, &fs_info->global_block_rsv);
btrfs_add_durable_block_rsv(fs_info, &fs_info->delalloc_block_rsv);
update_global_block_rsv(fs_info);
}
@ -4447,13 +4434,8 @@ static int unpin_extent_range(struct btrfs_root *root, u64 start, u64 end)
spin_lock(&cache->lock);
cache->pinned -= len;
cache->space_info->bytes_pinned -= len;
if (cache->ro) {
if (cache->ro)
cache->space_info->bytes_readonly += len;
} else if (cache->reserved_pinned > 0) {
len = min(len, cache->reserved_pinned);
cache->reserved_pinned -= len;
cache->space_info->bytes_may_use += len;
}
spin_unlock(&cache->lock);
spin_unlock(&cache->space_info->lock);
}
@ -4468,11 +4450,8 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct extent_io_tree *unpin;
struct btrfs_block_rsv *block_rsv;
struct btrfs_block_rsv *next_rsv;
u64 start;
u64 end;
int idx;
int ret;
if (fs_info->pinned_extents == &fs_info->freed_extents[0])
@ -4495,30 +4474,6 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
cond_resched();
}
mutex_lock(&fs_info->durable_block_rsv_mutex);
list_for_each_entry_safe(block_rsv, next_rsv,
&fs_info->durable_block_rsv_list, list) {
idx = trans->transid & 0x1;
if (block_rsv->freed[idx] > 0) {
block_rsv_add_bytes(block_rsv,
block_rsv->freed[idx], 0);
block_rsv->freed[idx] = 0;
}
if (atomic_read(&block_rsv->usage) == 0) {
btrfs_block_rsv_release(root, block_rsv, (u64)-1);
if (block_rsv->freed[0] == 0 &&
block_rsv->freed[1] == 0) {
list_del_init(&block_rsv->list);
kfree(block_rsv);
}
} else {
btrfs_block_rsv_release(root, block_rsv, 0);
}
}
mutex_unlock(&fs_info->durable_block_rsv_mutex);
return 0;
}
@ -4820,36 +4775,18 @@ void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) {
ret = check_ref_cleanup(trans, root, buf->start);
if (!ret)
goto pin;
goto out;
}
if (btrfs_header_flag(buf, BTRFS_HEADER_FLAG_WRITTEN)) {
pin_down_extent(root, cache, buf->start, buf->len, 1);
goto pin;
goto out;
}
WARN_ON(test_bit(EXTENT_BUFFER_DIRTY, &buf->bflags));
btrfs_add_free_space(cache, buf->start, buf->len);
btrfs_update_reserved_bytes(cache, buf->len, RESERVE_FREE);
goto out;
}
pin:
if (block_rsv->durable && !cache->ro) {
ret = 0;
spin_lock(&cache->lock);
if (!cache->ro) {
cache->reserved_pinned += buf->len;
ret = 1;
}
spin_unlock(&cache->lock);
if (ret) {
spin_lock(&block_rsv->lock);
block_rsv->freed[trans->transid & 0x1] += buf->len;
spin_unlock(&block_rsv->lock);
}
}
out:
/*
@ -6705,12 +6642,9 @@ static int set_block_group_ro(struct btrfs_block_group_cache *cache, int force)
cache->bytes_super - btrfs_block_group_used(&cache->item);
if (sinfo->bytes_used + sinfo->bytes_reserved + sinfo->bytes_pinned +
sinfo->bytes_may_use + sinfo->bytes_readonly +
cache->reserved_pinned + num_bytes + min_allocable_bytes <=
sinfo->total_bytes) {
sinfo->bytes_may_use + sinfo->bytes_readonly + num_bytes +
min_allocable_bytes <= sinfo->total_bytes) {
sinfo->bytes_readonly += num_bytes;
sinfo->bytes_may_use += cache->reserved_pinned;
cache->reserved_pinned = 0;
cache->ro = 1;
ret = 0;
}

4
fs/btrfs/inode.c
View File

@ -2164,9 +2164,6 @@ int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode)
}
spin_unlock(&root->orphan_lock);
if (block_rsv)
btrfs_add_durable_block_rsv(root->fs_info, block_rsv);
/* grab metadata reservation from transaction handle */
if (reserve) {
ret = btrfs_orphan_reserve_metadata(trans, inode);
@ -6505,7 +6502,6 @@ static int btrfs_truncate(struct inode *inode)
rsv = btrfs_alloc_block_rsv(root);
if (!rsv)
return -ENOMEM;
btrfs_add_durable_block_rsv(root->fs_info, rsv);
trans = btrfs_start_transaction(root, 4);
if (IS_ERR(trans)) {

1
fs/btrfs/relocation.c
View File

@ -3651,7 +3651,6 @@ int prepare_to_relocate(struct reloc_control *rc)
return ret;
rc->block_rsv->refill_used = 1;
btrfs_add_durable_block_rsv(rc->extent_root->fs_info, rc->block_rsv);
memset(&rc->cluster, 0, sizeof(rc->cluster));
rc->search_start = rc->block_group->key.objectid;