@@ -21,8 +21,10 @@
#define EXTENT_NORESERVE (1U << 15)
#define EXTENT_QGROUP_RESERVED (1U << 16)
#define EXTENT_CLEAR_DATA_RESV (1U << 17)
+#define EXTENT_SPACE_FREED (1U << 18)
#define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK)
-#define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING | EXTENT_FIRST_DELALLOC)
+#define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING | EXTENT_FIRST_DELALLOC |\
+ EXTENT_SPACE_FREED)
/*
* flags for bio submission. The high bits indicate the compression
@@ -912,10 +912,13 @@ static noinline int cow_file_range(struct inode *inode,
u64 num_bytes;
unsigned long ram_size;
u64 disk_num_bytes;
- u64 cur_alloc_size;
+ u64 cur_alloc_size = 0;
u64 blocksize = fs_info->sectorsize;
struct btrfs_key ins;
struct extent_map *em;
+ unsigned clear_bits;
+ unsigned long page_ops;
+ bool extent_reserved = false;
int ret = 0;
if (btrfs_is_free_space_inode(BTRFS_I(inode))) {
@@ -960,14 +963,15 @@ static noinline int cow_file_range(struct inode *inode,
start + num_bytes - 1, 0);
while (disk_num_bytes > 0) {
- unsigned long op;
-
+ extent_reserved = false;
cur_alloc_size = disk_num_bytes;
ret = btrfs_reserve_extent(root, cur_alloc_size, cur_alloc_size,
fs_info->sectorsize, 0, alloc_hint,
&ins, 1, 1);
if (ret < 0)
goto out_unlock;
+ cur_alloc_size = ins.offset;
+ extent_reserved = true;
ram_size = ins.offset;
em = create_io_em(inode, start, ins.offset, /* len */
@@ -982,7 +986,6 @@ static noinline int cow_file_range(struct inode *inode,
goto out_reserve;
free_extent_map(em);
- cur_alloc_size = ins.offset;
ret = btrfs_add_ordered_extent(inode, start, ins.objectid,
ram_size, cur_alloc_size, 0);
if (ret)
@@ -1008,14 +1011,14 @@ static noinline int cow_file_range(struct inode *inode,
* Do set the Private2 bit so we know this page was properly
* setup for writepage
*/
- op = unlock ? PAGE_UNLOCK : 0;
- op |= PAGE_SET_PRIVATE2;
+ page_ops = unlock ? PAGE_UNLOCK : 0;
+ page_ops |= PAGE_SET_PRIVATE2;
extent_clear_unlock_delalloc(inode, start,
start + ram_size - 1,
locked_page,
EXTENT_LOCKED | EXTENT_DELALLOC,
- op);
+ page_ops);
disk_num_bytes -= cur_alloc_size;
num_bytes -= cur_alloc_size;
alloc_hint = ins.objectid + ins.offset;
@@ -1030,12 +1033,24 @@ static noinline int cow_file_range(struct inode *inode,
btrfs_dec_block_group_reservations(fs_info, ins.objectid);
btrfs_free_reserved_extent(fs_info, ins.objectid, ins.offset, 1);
out_unlock:
+ clear_bits = EXTENT_LOCKED | EXTENT_DO_ACCOUNTING | EXTENT_DELALLOC |
+ EXTENT_DEFRAG;
+ page_ops = PAGE_UNLOCK | PAGE_CLEAR_DIRTY | PAGE_SET_WRITEBACK |
+ PAGE_END_WRITEBACK;
+ if (extent_reserved) {
+ extent_clear_unlock_delalloc(inode, start,
+ start + cur_alloc_size,
+ locked_page,
+ clear_bits | EXTENT_SPACE_FREED,
+ page_ops);
+ start += cur_alloc_size;
+ if (start >= end)
+ goto out;
+ }
extent_clear_unlock_delalloc(inode, start, end,
locked_page,
- EXTENT_LOCKED | EXTENT_DO_ACCOUNTING |
- EXTENT_DELALLOC | EXTENT_DEFRAG,
- PAGE_UNLOCK | PAGE_CLEAR_DIRTY |
- PAGE_SET_WRITEBACK | PAGE_END_WRITEBACK);
+ clear_bits,
+ page_ops);
goto out;
}
@@ -1735,10 +1750,10 @@ static void btrfs_clear_bit_hook(struct btrfs_inode *inode,
if (btrfs_is_testing(fs_info))
return;
- if (root->root_key.objectid != BTRFS_DATA_RELOC_TREE_OBJECTID
- && do_list && !(state->state & EXTENT_NORESERVE)
- && (*bits & (EXTENT_DO_ACCOUNTING |
- EXTENT_CLEAR_DATA_RESV)))
+ if (root->root_key.objectid != BTRFS_DATA_RELOC_TREE_OBJECTID &&
+ do_list && !(state->state & EXTENT_NORESERVE) &&
+ (*bits & (EXTENT_DO_ACCOUNTING | EXTENT_CLEAR_DATA_RESV)) &&
+ !(*bits & EXTENT_SPACE_FREED))
btrfs_free_reserved_data_space_noquota(
&inode->vfs_inode,
state->start, len);