Btrfs: kill the durable block rsv stuff
This is confusing code and isn't used by anything anymore, so delete it.
Signed-off-by: Josef Bacik <josef@redhat.com>
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 4ef777e..c5ceba4 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -772,13 +772,10 @@
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 @@
spinlock_t lock;
u64 pinned;
u64 reserved;
- u64 reserved_pinned;
u64 bytes_super;
u64 flags;
u64 sectorsize;
@@ -919,11 +915,6 @@
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 @@
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,
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 07b3ac6..0b5643a 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1665,8 +1665,6 @@
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);
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 4add1ac..30c0558 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -121,7 +121,6 @@
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 @@
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 @@
{
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 @@
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 @@
}
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 @@
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 @@
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 @@
{
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 @@
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 @@
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 @@
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;
}
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 5f5f8a5..6402a41 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2164,9 +2164,6 @@
}
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 @@
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)) {
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 59bb176..545b043 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -3651,7 +3651,6 @@
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;
