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bcachefs: convert fcollapse to bch2_extent_update()

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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2018-08-11 17:26:11 -04:00 committed by Kent Overstreet
parent 5f461e01b8
commit 8ef231bd51
1 changed files with 30 additions and 37 deletions
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67
fs/bcachefs/fs-io.c
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@ -2424,7 +2424,6 @@ static long bch2_fcollapse(struct bch_inode_info *inode,
struct btree_iter *src, *dst;
BKEY_PADDED(k) copy;
struct bkey_s_c k;
struct i_sectors_hook i_sectors_hook = i_sectors_hook_init(inode, 0);
loff_t new_size;
int ret;
@ -2432,16 +2431,7 @@ static long bch2_fcollapse(struct bch_inode_info *inode,
return -EINVAL;
bch2_trans_init(&trans, c);
dst = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS,
POS(inode->v.i_ino, offset >> 9),
BTREE_ITER_SLOTS|BTREE_ITER_INTENT);
BUG_ON(IS_ERR(dst));
/* position will be set from dst iter's position: */
src = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS, POS_MIN,
BTREE_ITER_SLOTS);
BUG_ON(IS_ERR(src));
bch2_trans_preload_iters(&trans);
/*
* We need i_mutex to keep the page cache consistent with the extents
@ -2466,15 +2456,24 @@ static long bch2_fcollapse(struct bch_inode_info *inode,
if (ret)
goto err;
ret = i_sectors_dirty_start(c, &i_sectors_hook);
if (ret)
goto err;
dst = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS,
POS(inode->v.i_ino, offset >> 9),
BTREE_ITER_SLOTS|BTREE_ITER_INTENT);
BUG_ON(IS_ERR_OR_NULL(dst));
src = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS,
POS_MIN, BTREE_ITER_SLOTS);
BUG_ON(IS_ERR_OR_NULL(src));
while (bkey_cmp(dst->pos,
POS(inode->v.i_ino,
round_up(new_size, PAGE_SIZE) >> 9)) < 0) {
struct disk_reservation disk_res;
ret = bch2_btree_iter_traverse(dst);
if (ret)
goto btree_iter_err;
bch2_btree_iter_set_pos(src,
POS(dst->pos.inode, dst->pos.offset + (len >> 9)));
@ -2487,10 +2486,6 @@ static long bch2_fcollapse(struct bch_inode_info *inode,
bch2_cut_front(src->pos, &copy.k);
copy.k.k.p.offset -= len >> 9;
ret = bch2_btree_iter_traverse(dst);
if (ret)
goto btree_iter_err;
bch2_extent_trim_atomic(&copy.k, dst);
BUG_ON(bkey_cmp(dst->pos, bkey_start_pos(&copy.k.k)));
@ -2500,19 +2495,16 @@ static long bch2_fcollapse(struct bch_inode_info *inode,
BCH_DISK_RESERVATION_NOFAIL);
BUG_ON(ret);
ret = bch2_btree_insert_at(c, &disk_res, &i_sectors_hook.hook,
&inode->ei_journal_seq,
BTREE_INSERT_ATOMIC|
BTREE_INSERT_NOFAIL,
BTREE_INSERT_ENTRY(dst, &copy.k));
ret = bch2_extent_update(&trans, inode,
&disk_res, NULL,
dst, &copy.k,
0, true, true, NULL);
bch2_disk_reservation_put(c, &disk_res);
btree_iter_err:
if (ret == -EINTR)
ret = 0;
if (ret) {
bch2_trans_exit(&trans);
goto err_put_sectors_dirty;
}
if (ret)
goto err;
/*
* XXX: if we error here we've left data with multiple
* pointers... which isn't a _super_ serious problem...
@ -2520,20 +2512,21 @@ static long bch2_fcollapse(struct bch_inode_info *inode,
bch2_btree_iter_cond_resched(src);
}
bch2_trans_unlock(&trans);
bch2_trans_exit(&trans);
ret = bch2_inode_truncate(c, inode->v.i_ino,
round_up(new_size, block_bytes(c)) >> 9,
&i_sectors_hook.hook,
&inode->ei_journal_seq);
ret = __bch2_fpunch(c, inode,
round_up(new_size, block_bytes(c)) >> 9,
U64_MAX, &inode->ei_journal_seq);
if (ret)
goto err_put_sectors_dirty;
goto err;
i_sectors_hook.new_i_size = new_size;
err_put_sectors_dirty:
ret = i_sectors_dirty_finish(c, &i_sectors_hook) ?: ret;
i_size_write(&inode->v, new_size);
mutex_lock(&inode->ei_update_lock);
ret = bch2_write_inode_size(c, inode, new_size,
ATTR_MTIME|ATTR_CTIME);
mutex_unlock(&inode->ei_update_lock);
err:
bch2_trans_exit(&trans);
bch2_pagecache_block_put(&inode->ei_pagecache_lock);
inode_unlock(&inode->v);
return ret;