Btrfs: use bitfield instead of integer data type for the some variants in btrfs_root
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 1bcfcdb..2f10e12 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -224,7 +224,8 @@
static void add_root_to_dirty_list(struct btrfs_root *root)
{
spin_lock(&root->fs_info->trans_lock);
- if (root->track_dirty && list_empty(&root->dirty_list)) {
+ if (test_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state) &&
+ list_empty(&root->dirty_list)) {
list_add(&root->dirty_list,
&root->fs_info->dirty_cowonly_roots);
}
@@ -246,9 +247,10 @@
int level;
struct btrfs_disk_key disk_key;
- WARN_ON(root->ref_cows && trans->transid !=
- root->fs_info->running_transaction->transid);
- WARN_ON(root->ref_cows && trans->transid != root->last_trans);
+ WARN_ON(test_bit(BTRFS_ROOT_REF_COWS, &root->state) &&
+ trans->transid != root->fs_info->running_transaction->transid);
+ WARN_ON(test_bit(BTRFS_ROOT_REF_COWS, &root->state) &&
+ trans->transid != root->last_trans);
level = btrfs_header_level(buf);
if (level == 0)
@@ -997,14 +999,14 @@
* snapshot and the block was not allocated by tree relocation,
* we know the block is not shared.
*/
- if (root->ref_cows &&
+ if (test_bit(BTRFS_ROOT_REF_COWS, &root->state) &&
buf != root->node && buf != root->commit_root &&
(btrfs_header_generation(buf) <=
btrfs_root_last_snapshot(&root->root_item) ||
btrfs_header_flag(buf, BTRFS_HEADER_FLAG_RELOC)))
return 1;
#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
- if (root->ref_cows &&
+ if (test_bit(BTRFS_ROOT_REF_COWS, &root->state) &&
btrfs_header_backref_rev(buf) < BTRFS_MIXED_BACKREF_REV)
return 1;
#endif
@@ -1146,9 +1148,10 @@
btrfs_assert_tree_locked(buf);
- WARN_ON(root->ref_cows && trans->transid !=
- root->fs_info->running_transaction->transid);
- WARN_ON(root->ref_cows && trans->transid != root->last_trans);
+ WARN_ON(test_bit(BTRFS_ROOT_REF_COWS, &root->state) &&
+ trans->transid != root->fs_info->running_transaction->transid);
+ WARN_ON(test_bit(BTRFS_ROOT_REF_COWS, &root->state) &&
+ trans->transid != root->last_trans);
level = btrfs_header_level(buf);
@@ -1193,7 +1196,7 @@
return ret;
}
- if (root->ref_cows) {
+ if (test_bit(BTRFS_ROOT_REF_COWS, &root->state)) {
ret = btrfs_reloc_cow_block(trans, root, buf, cow);
if (ret)
return ret;
@@ -1556,7 +1559,7 @@
!btrfs_header_flag(buf, BTRFS_HEADER_FLAG_WRITTEN) &&
!(root->root_key.objectid != BTRFS_TREE_RELOC_OBJECTID &&
btrfs_header_flag(buf, BTRFS_HEADER_FLAG_RELOC)) &&
- !root->force_cow)
+ !test_bit(BTRFS_ROOT_FORCE_COW, &root->state))
return 0;
return 1;
}
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 0a805b8..efd3bf6 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1711,6 +1711,26 @@
};
/*
+ * The state of btrfs root
+ */
+/*
+ * btrfs_record_root_in_trans is a multi-step process,
+ * and it can race with the balancing code. But the
+ * race is very small, and only the first time the root
+ * is added to each transaction. So IN_TRANS_SETUP
+ * is used to tell us when more checks are required
+ */
+#define BTRFS_ROOT_IN_TRANS_SETUP 0
+#define BTRFS_ROOT_REF_COWS 1
+#define BTRFS_ROOT_TRACK_DIRTY 2
+#define BTRFS_ROOT_IN_RADIX 3
+#define BTRFS_ROOT_DUMMY_ROOT 4
+#define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 5
+#define BTRFS_ROOT_DEFRAG_RUNNING 6
+#define BTRFS_ROOT_FORCE_COW 7
+#define BTRFS_ROOT_MULTI_LOG_TASKS 8
+
+/*
* in ram representation of the tree. extent_root is used for all allocations
* and for the extent tree extent_root root.
*/
@@ -1721,6 +1741,7 @@
struct btrfs_root *log_root;
struct btrfs_root *reloc_root;
+ unsigned long state;
struct btrfs_root_item root_item;
struct btrfs_key root_key;
struct btrfs_fs_info *fs_info;
@@ -1755,7 +1776,6 @@
/* Just be updated when the commit succeeds. */
int last_log_commit;
pid_t log_start_pid;
- bool log_multiple_pids;
u64 objectid;
u64 last_trans;
@@ -1775,23 +1795,9 @@
u64 highest_objectid;
- /* btrfs_record_root_in_trans is a multi-step process,
- * and it can race with the balancing code. But the
- * race is very small, and only the first time the root
- * is added to each transaction. So in_trans_setup
- * is used to tell us when more checks are required
- */
- unsigned long in_trans_setup;
- int ref_cows;
- int track_dirty;
- int in_radix;
-#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
- int dummy_root;
-#endif
u64 defrag_trans_start;
struct btrfs_key defrag_progress;
struct btrfs_key defrag_max;
- int defrag_running;
char *name;
/* the dirty list is only used by non-reference counted roots */
@@ -1805,7 +1811,6 @@
spinlock_t orphan_lock;
atomic_t orphan_inodes;
struct btrfs_block_rsv *orphan_block_rsv;
- int orphan_item_inserted;
int orphan_cleanup_state;
spinlock_t inode_lock;
@@ -1823,8 +1828,6 @@
*/
dev_t anon_dev;
- int force_cow;
-
spinlock_t root_item_lock;
atomic_t refs;
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 85f5144..cf8427a 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1201,10 +1201,7 @@
root->nodesize = nodesize;
root->leafsize = leafsize;
root->stripesize = stripesize;
- root->ref_cows = 0;
- root->track_dirty = 0;
- root->in_radix = 0;
- root->orphan_item_inserted = 0;
+ root->state = 0;
root->orphan_cleanup_state = 0;
root->objectid = objectid;
@@ -1265,7 +1262,6 @@
else
root->defrag_trans_start = 0;
init_completion(&root->kobj_unregister);
- root->defrag_running = 0;
root->root_key.objectid = objectid;
root->anon_dev = 0;
@@ -1290,7 +1286,7 @@
if (!root)
return ERR_PTR(-ENOMEM);
__setup_root(4096, 4096, 4096, 4096, root, NULL, 1);
- root->dummy_root = 1;
+ set_bit(BTRFS_ROOT_DUMMY_ROOT, &root->state);
return root;
}
@@ -1341,8 +1337,7 @@
btrfs_mark_buffer_dirty(leaf);
root->commit_root = btrfs_root_node(root);
- root->track_dirty = 1;
-
+ set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);
root->root_item.flags = 0;
root->root_item.byte_limit = 0;
@@ -1396,13 +1391,15 @@
root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID;
root->root_key.type = BTRFS_ROOT_ITEM_KEY;
root->root_key.offset = BTRFS_TREE_LOG_OBJECTID;
+
/*
+ * DON'T set REF_COWS for log trees
+ *
* log trees do not get reference counted because they go away
* before a real commit is actually done. They do store pointers
* to file data extents, and those reference counts still get
* updated (along with back refs to the log tree).
*/
- root->ref_cows = 0;
leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0,
BTRFS_TREE_LOG_OBJECTID, NULL,
@@ -1536,7 +1533,7 @@
return root;
if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) {
- root->ref_cows = 1;
+ set_bit(BTRFS_ROOT_REF_COWS, &root->state);
btrfs_check_and_init_root_item(&root->root_item);
}
@@ -1606,7 +1603,7 @@
(unsigned long)root->root_key.objectid,
root);
if (ret == 0)
- root->in_radix = 1;
+ set_bit(BTRFS_ROOT_IN_RADIX, &root->state);
spin_unlock(&fs_info->fs_roots_radix_lock);
radix_tree_preload_end();
@@ -1662,7 +1659,7 @@
if (ret < 0)
goto fail;
if (ret == 0)
- root->orphan_item_inserted = 1;
+ set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state);
ret = btrfs_insert_fs_root(fs_info, root);
if (ret) {
@@ -2101,7 +2098,7 @@
struct btrfs_root, root_list);
list_del(&gang[0]->root_list);
- if (gang[0]->in_radix) {
+ if (test_bit(BTRFS_ROOT_IN_RADIX, &gang[0]->state)) {
btrfs_drop_and_free_fs_root(fs_info, gang[0]);
} else {
free_extent_buffer(gang[0]->node);
@@ -2694,7 +2691,7 @@
ret = PTR_ERR(extent_root);
goto recovery_tree_root;
}
- extent_root->track_dirty = 1;
+ set_bit(BTRFS_ROOT_TRACK_DIRTY, &extent_root->state);
fs_info->extent_root = extent_root;
location.objectid = BTRFS_DEV_TREE_OBJECTID;
@@ -2703,7 +2700,7 @@
ret = PTR_ERR(dev_root);
goto recovery_tree_root;
}
- dev_root->track_dirty = 1;
+ set_bit(BTRFS_ROOT_TRACK_DIRTY, &dev_root->state);
fs_info->dev_root = dev_root;
btrfs_init_devices_late(fs_info);
@@ -2713,13 +2710,13 @@
ret = PTR_ERR(csum_root);
goto recovery_tree_root;
}
- csum_root->track_dirty = 1;
+ set_bit(BTRFS_ROOT_TRACK_DIRTY, &csum_root->state);
fs_info->csum_root = csum_root;
location.objectid = BTRFS_QUOTA_TREE_OBJECTID;
quota_root = btrfs_read_tree_root(tree_root, &location);
if (!IS_ERR(quota_root)) {
- quota_root->track_dirty = 1;
+ set_bit(BTRFS_ROOT_TRACK_DIRTY, "a_root->state);
fs_info->quota_enabled = 1;
fs_info->pending_quota_state = 1;
fs_info->quota_root = quota_root;
@@ -2734,7 +2731,7 @@
create_uuid_tree = true;
check_uuid_tree = false;
} else {
- uuid_root->track_dirty = 1;
+ set_bit(BTRFS_ROOT_TRACK_DIRTY, &uuid_root->state);
fs_info->uuid_root = uuid_root;
create_uuid_tree = false;
check_uuid_tree =
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 15467e3..7c18566 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2983,7 +2983,7 @@
nritems = btrfs_header_nritems(buf);
level = btrfs_header_level(buf);
- if (!root->ref_cows && level == 0)
+ if (!test_bit(BTRFS_ROOT_REF_COWS, &root->state) && level == 0)
return 0;
if (inc)
@@ -4472,7 +4472,7 @@
{
struct btrfs_block_rsv *block_rsv = NULL;
- if (root->ref_cows)
+ if (test_bit(BTRFS_ROOT_REF_COWS, &root->state))
block_rsv = trans->block_rsv;
if (root == root->fs_info->csum_root && trans->adding_csums)
@@ -7838,7 +7838,7 @@
}
}
- if (root->in_radix) {
+ if (test_bit(BTRFS_ROOT_IN_RADIX, &root->state)) {
btrfs_drop_and_free_fs_root(tree_root->fs_info, root);
} else {
free_extent_buffer(root->node);
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 3029925..5c6947d 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -714,7 +714,7 @@
int recow;
int ret;
int modify_tree = -1;
- int update_refs = (root->ref_cows || root == root->fs_info->tree_root);
+ int update_refs;
int found = 0;
int leafs_visited = 0;
@@ -724,6 +724,8 @@
if (start >= BTRFS_I(inode)->disk_i_size && !replace_extent)
modify_tree = 0;
+ update_refs = (test_bit(BTRFS_ROOT_REF_COWS, &root->state) ||
+ root == root->fs_info->tree_root);
while (1) {
recow = 0;
ret = btrfs_lookup_file_extent(trans, root, path, ino,
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 36c13e3..ef3bd3d 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2947,14 +2947,15 @@
root->orphan_block_rsv = NULL;
spin_unlock(&root->orphan_lock);
- if (root->orphan_item_inserted &&
+ if (test_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state) &&
btrfs_root_refs(&root->root_item) > 0) {
ret = btrfs_del_orphan_item(trans, root->fs_info->tree_root,
root->root_key.objectid);
if (ret)
btrfs_abort_transaction(trans, root, ret);
else
- root->orphan_item_inserted = 0;
+ clear_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
+ &root->state);
}
if (block_rsv) {
@@ -3271,7 +3272,8 @@
btrfs_block_rsv_release(root, root->orphan_block_rsv,
(u64)-1);
- if (root->orphan_block_rsv || root->orphan_item_inserted) {
+ if (root->orphan_block_rsv ||
+ test_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state)) {
trans = btrfs_join_transaction(root);
if (!IS_ERR(trans))
btrfs_end_transaction(trans, root);
@@ -3998,7 +4000,8 @@
* not block aligned since we will be keeping the last block of the
* extent just the way it is.
*/
- if (root->ref_cows || root == root->fs_info->tree_root)
+ if (test_bit(BTRFS_ROOT_REF_COWS, &root->state) ||
+ root == root->fs_info->tree_root)
btrfs_drop_extent_cache(inode, ALIGN(new_size,
root->sectorsize), (u64)-1, 0);
@@ -4091,7 +4094,9 @@
extent_num_bytes);
num_dec = (orig_num_bytes -
extent_num_bytes);
- if (root->ref_cows && extent_start != 0)
+ if (test_bit(BTRFS_ROOT_REF_COWS,
+ &root->state) &&
+ extent_start != 0)
inode_sub_bytes(inode, num_dec);
btrfs_mark_buffer_dirty(leaf);
} else {
@@ -4105,7 +4110,8 @@
num_dec = btrfs_file_extent_num_bytes(leaf, fi);
if (extent_start != 0) {
found_extent = 1;
- if (root->ref_cows)
+ if (test_bit(BTRFS_ROOT_REF_COWS,
+ &root->state))
inode_sub_bytes(inode, num_dec);
}
}
@@ -4120,10 +4126,9 @@
btrfs_file_extent_other_encoding(leaf, fi) == 0) {
u32 size = new_size - found_key.offset;
- if (root->ref_cows) {
+ if (test_bit(BTRFS_ROOT_REF_COWS, &root->state))
inode_sub_bytes(inode, item_end + 1 -
new_size);
- }
/*
* update the ram bytes to properly reflect
@@ -4133,7 +4138,8 @@
size =
btrfs_file_extent_calc_inline_size(size);
btrfs_truncate_item(root, path, size, 1);
- } else if (root->ref_cows) {
+ } else if (test_bit(BTRFS_ROOT_REF_COWS,
+ &root->state)) {
inode_sub_bytes(inode, item_end + 1 -
found_key.offset);
}
@@ -4155,8 +4161,9 @@
} else {
break;
}
- if (found_extent && (root->ref_cows ||
- root == root->fs_info->tree_root)) {
+ if (found_extent &&
+ (test_bit(BTRFS_ROOT_REF_COWS, &root->state) ||
+ root == root->fs_info->tree_root)) {
btrfs_set_path_blocking(path);
ret = btrfs_free_extent(trans, root, extent_start,
extent_num_bytes, 0,
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index ebac486..242a37c 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -638,7 +638,7 @@
struct btrfs_trans_handle *trans;
int ret;
- if (!root->ref_cows)
+ if (!test_bit(BTRFS_ROOT_REF_COWS, &root->state))
return -EINVAL;
atomic_inc(&root->will_be_snapshoted);
@@ -2369,7 +2369,7 @@
dest->root_item.drop_level = 0;
btrfs_set_root_refs(&dest->root_item, 0);
- if (!xchg(&dest->orphan_item_inserted, 1)) {
+ if (!test_and_set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &dest->state)) {
ret = btrfs_insert_orphan_item(trans,
root->fs_info->tree_root,
dest->root_key.objectid);
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 7f92ab1..b9cf0f5 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -528,7 +528,7 @@
{
struct btrfs_root *reloc_root;
- if (!root->ref_cows)
+ if (!test_bit(BTRFS_ROOT_REF_COWS, &root->state))
return 0;
reloc_root = root->reloc_root;
@@ -610,7 +610,7 @@
root = read_fs_root(rc->extent_root->fs_info, root_objectid);
BUG_ON(IS_ERR(root));
- if (root->ref_cows &&
+ if (test_bit(BTRFS_ROOT_REF_COWS, &root->state) &&
generation != btrfs_root_generation(&root->root_item))
return NULL;
@@ -887,7 +887,7 @@
goto out;
}
- if (!root->ref_cows)
+ if (!test_bit(BTRFS_ROOT_REF_COWS, &root->state))
cur->cowonly = 1;
if (btrfs_root_level(&root->root_item) == cur->level) {
@@ -954,7 +954,8 @@
upper->bytenr = eb->start;
upper->owner = btrfs_header_owner(eb);
upper->level = lower->level + 1;
- if (!root->ref_cows)
+ if (!test_bit(BTRFS_ROOT_REF_COWS,
+ &root->state))
upper->cowonly = 1;
/*
@@ -2441,7 +2442,7 @@
next = walk_up_backref(next, edges, &index);
root = next->root;
BUG_ON(!root);
- BUG_ON(!root->ref_cows);
+ BUG_ON(!test_bit(BTRFS_ROOT_REF_COWS, &root->state));
if (root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID) {
record_reloc_root_in_trans(trans, root);
@@ -2506,7 +2507,7 @@
BUG_ON(!root);
/* no other choice for non-references counted tree */
- if (!root->ref_cows)
+ if (!test_bit(BTRFS_ROOT_REF_COWS, &root->state))
return root;
if (root->root_key.objectid != BTRFS_TREE_RELOC_OBJECTID)
@@ -2893,14 +2894,14 @@
goto out;
}
- if (!root || root->ref_cows) {
+ if (!root || test_bit(BTRFS_ROOT_REF_COWS, &root->state)) {
ret = reserve_metadata_space(trans, rc, node);
if (ret)
goto out;
}
if (root) {
- if (root->ref_cows) {
+ if (test_bit(BTRFS_ROOT_REF_COWS, &root->state)) {
BUG_ON(node->new_bytenr);
BUG_ON(!list_empty(&node->list));
btrfs_record_root_in_trans(trans, root);
diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c
index 38bb47e..360a728 100644
--- a/fs/btrfs/root-tree.c
+++ b/fs/btrfs/root-tree.c
@@ -306,7 +306,7 @@
break;
}
- root->orphan_item_inserted = 1;
+ set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state);
err = btrfs_insert_fs_root(root->fs_info, root);
if (err) {
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index c30815e..7c4c049 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -241,18 +241,19 @@
static int record_root_in_trans(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
- if (root->ref_cows && root->last_trans < trans->transid) {
+ if (test_bit(BTRFS_ROOT_REF_COWS, &root->state) &&
+ root->last_trans < trans->transid) {
WARN_ON(root == root->fs_info->extent_root);
WARN_ON(root->commit_root != root->node);
/*
- * see below for in_trans_setup usage rules
+ * see below for IN_TRANS_SETUP usage rules
* we have the reloc mutex held now, so there
* is only one writer in this function
*/
- root->in_trans_setup = 1;
+ set_bit(BTRFS_ROOT_IN_TRANS_SETUP, &root->state);
- /* make sure readers find in_trans_setup before
+ /* make sure readers find IN_TRANS_SETUP before
* they find our root->last_trans update
*/
smp_wmb();
@@ -279,7 +280,7 @@
* But, we have to set root->last_trans before we
* init the relocation root, otherwise, we trip over warnings
* in ctree.c. The solution used here is to flag ourselves
- * with root->in_trans_setup. When this is 1, we're still
+ * with root IN_TRANS_SETUP. When this is 1, we're still
* fixing up the reloc trees and everyone must wait.
*
* When this is zero, they can trust root->last_trans and fly
@@ -288,8 +289,8 @@
* done before we pop in the zero below
*/
btrfs_init_reloc_root(trans, root);
- smp_wmb();
- root->in_trans_setup = 0;
+ smp_mb__before_clear_bit();
+ clear_bit(BTRFS_ROOT_IN_TRANS_SETUP, &root->state);
}
return 0;
}
@@ -298,16 +299,16 @@
int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
- if (!root->ref_cows)
+ if (!test_bit(BTRFS_ROOT_REF_COWS, &root->state))
return 0;
/*
- * see record_root_in_trans for comments about in_trans_setup usage
+ * see record_root_in_trans for comments about IN_TRANS_SETUP usage
* and barriers
*/
smp_rmb();
if (root->last_trans == trans->transid &&
- !root->in_trans_setup)
+ !test_bit(BTRFS_ROOT_IN_TRANS_SETUP, &root->state))
return 0;
mutex_lock(&root->fs_info->reloc_mutex);
@@ -365,7 +366,7 @@
static inline bool need_reserve_reloc_root(struct btrfs_root *root)
{
if (!root->fs_info->reloc_ctl ||
- !root->ref_cows ||
+ !test_bit(BTRFS_ROOT_REF_COWS, &root->state) ||
root->root_key.objectid == BTRFS_TREE_RELOC_OBJECTID ||
root->reloc_root)
return false;
@@ -1049,8 +1050,8 @@
btrfs_save_ino_cache(root, trans);
/* see comments in should_cow_block() */
- root->force_cow = 0;
- smp_wmb();
+ clear_bit(BTRFS_ROOT_FORCE_COW, &root->state);
+ smp_mb__after_clear_bit();
if (root->commit_root != root->node) {
list_add_tail(&root->dirty_list,
@@ -1081,7 +1082,7 @@
struct btrfs_trans_handle *trans;
int ret;
- if (xchg(&root->defrag_running, 1))
+ if (test_and_set_bit(BTRFS_ROOT_DEFRAG_RUNNING, &root->state))
return 0;
while (1) {
@@ -1104,7 +1105,7 @@
break;
}
}
- root->defrag_running = 0;
+ clear_bit(BTRFS_ROOT_DEFRAG_RUNNING, &root->state);
return ret;
}
@@ -1271,7 +1272,7 @@
}
/* see comments in should_cow_block() */
- root->force_cow = 1;
+ set_bit(BTRFS_ROOT_FORCE_COW, &root->state);
smp_wmb();
btrfs_set_root_node(new_root_item, tmp);
diff --git a/fs/btrfs/tree-defrag.c b/fs/btrfs/tree-defrag.c
index 76928ca..a63719c 100644
--- a/fs/btrfs/tree-defrag.c
+++ b/fs/btrfs/tree-defrag.c
@@ -49,7 +49,7 @@
goto out;
}
- if (root->ref_cows == 0)
+ if (!test_bit(BTRFS_ROOT_REF_COWS, &root->state))
goto out;
if (btrfs_test_opt(root, SSD))
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index e2f45fc..ffee158 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -152,9 +152,9 @@
if (!root->log_start_pid) {
root->log_start_pid = current->pid;
- root->log_multiple_pids = false;
+ clear_bit(BTRFS_ROOT_MULTI_LOG_TASKS, &root->state);
} else if (root->log_start_pid != current->pid) {
- root->log_multiple_pids = true;
+ set_bit(BTRFS_ROOT_MULTI_LOG_TASKS, &root->state);
}
atomic_inc(&root->log_batch);
@@ -181,7 +181,7 @@
if (ret)
goto out;
}
- root->log_multiple_pids = false;
+ clear_bit(BTRFS_ROOT_MULTI_LOG_TASKS, &root->state);
root->log_start_pid = current->pid;
atomic_inc(&root->log_batch);
atomic_inc(&root->log_writers);
@@ -2500,7 +2500,8 @@
while (1) {
int batch = atomic_read(&root->log_batch);
/* when we're on an ssd, just kick the log commit out */
- if (!btrfs_test_opt(root, SSD) && root->log_multiple_pids) {
+ if (!btrfs_test_opt(root, SSD) &&
+ test_bit(BTRFS_ROOT_MULTI_LOG_TASKS, &root->state)) {
mutex_unlock(&root->log_mutex);
schedule_timeout_uninterruptible(1);
mutex_lock(&root->log_mutex);