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Merge branch 'for-chris-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/fdmanana/linux into for-linus-4.12

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This commit is contained in:
Chris Mason
2017-04-27 14:13:09 -07:00
parent c2a9c7ab47 a7e3b975a0
commit bce19f9d23
5 changed files with 277 additions and 66 deletions
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66
fs/btrfs/file.c
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@@ -1404,6 +1404,47 @@ fail:
}
static int btrfs_find_new_delalloc_bytes(struct btrfs_inode *inode,
const u64 start,
const u64 len,
struct extent_state **cached_state)
{
u64 search_start = start;
const u64 end = start + len - 1;
while (search_start < end) {
const u64 search_len = end - search_start + 1;
struct extent_map *em;
u64 em_len;
int ret = 0;
em = btrfs_get_extent(inode, NULL, 0, search_start,
search_len, 0);
if (IS_ERR(em))
return PTR_ERR(em);
if (em->block_start != EXTENT_MAP_HOLE)
goto next;
em_len = em->len;
if (em->start < search_start)
em_len -= search_start - em->start;
if (em_len > search_len)
em_len = search_len;
ret = set_extent_bit(&inode->io_tree, search_start,
search_start + em_len - 1,
EXTENT_DELALLOC_NEW,
NULL, cached_state, GFP_NOFS);
next:
search_start = extent_map_end(em);
free_extent_map(em);
if (ret)
return ret;
}
return 0;
}
/*
* This function locks the extent and properly waits for data=ordered extents
* to finish before allowing the pages to be modified if need.
@@ -1432,8 +1473,11 @@ lock_and_cleanup_extent_if_need(struct btrfs_inode *inode, struct page **pages,
+ round_up(pos + write_bytes - start_pos,
fs_info->sectorsize) - 1;
if (start_pos < inode->vfs_inode.i_size) {
if (start_pos < inode->vfs_inode.i_size ||
(inode->flags & BTRFS_INODE_PREALLOC)) {
struct btrfs_ordered_extent *ordered;
unsigned int clear_bits;
lock_extent_bits(&inode->io_tree, start_pos, last_pos,
cached_state);
ordered = btrfs_lookup_ordered_range(inode, start_pos,
@@ -1454,11 +1498,19 @@ lock_and_cleanup_extent_if_need(struct btrfs_inode *inode, struct page **pages,
}
if (ordered)
btrfs_put_ordered_extent(ordered);
ret = btrfs_find_new_delalloc_bytes(inode, start_pos,
last_pos - start_pos + 1,
cached_state);
clear_bits = EXTENT_DIRTY | EXTENT_DELALLOC |
EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG;
if (ret)
clear_bits |= EXTENT_DELALLOC_NEW | EXTENT_LOCKED;
clear_extent_bit(&inode->io_tree, start_pos,
last_pos, EXTENT_DIRTY | EXTENT_DELALLOC |
EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG,
0, 0, cached_state, GFP_NOFS);
last_pos, clear_bits,
(clear_bits & EXTENT_LOCKED) ? 1 : 0,
0, cached_state, GFP_NOFS);
if (ret)
return ret;
*lockstart = start_pos;
*lockend = last_pos;
ret = 1;
@@ -2848,8 +2900,10 @@ static long btrfs_fallocate(struct file *file, int mode,
}
ret = btrfs_qgroup_reserve_data(inode, cur_offset,
last_byte - cur_offset);
if (ret < 0)
if (ret < 0) {
free_extent_map(em);
break;
}
} else {
/*
* Do not need to reserve unwritten extent for this