* and free up our temp pages.
*/
extent_clear_unlock_delalloc(inode,
- &BTRFS_I(inode)->io_tree,
- start, end, NULL, 1, 0,
- 0, 1, 1, 1, 0);
+ &BTRFS_I(inode)->io_tree,
+ start, end, NULL,
+ EXTENT_CLEAR_UNLOCK_PAGE | EXTENT_CLEAR_DIRTY |
+ EXTENT_CLEAR_DELALLOC |
+ EXTENT_CLEAR_ACCOUNTING |
+ EXTENT_SET_WRITEBACK | EXTENT_END_WRITEBACK);
ret = 0;
goto free_pages_out;
}
* clear dirty, set writeback and unlock the pages.
*/
extent_clear_unlock_delalloc(inode,
- &BTRFS_I(inode)->io_tree,
- async_extent->start,
- async_extent->start +
- async_extent->ram_size - 1,
- NULL, 1, 1, 0, 1, 1, 0, 0);
+ &BTRFS_I(inode)->io_tree,
+ async_extent->start,
+ async_extent->start +
+ async_extent->ram_size - 1,
+ NULL, EXTENT_CLEAR_UNLOCK_PAGE |
+ EXTENT_CLEAR_UNLOCK |
+ EXTENT_CLEAR_DELALLOC |
+ EXTENT_CLEAR_DIRTY | EXTENT_SET_WRITEBACK);
ret = btrfs_submit_compressed_write(inode,
async_extent->start,
start, end, 0, NULL);
if (ret == 0) {
extent_clear_unlock_delalloc(inode,
- &BTRFS_I(inode)->io_tree,
- start, end, NULL, 1, 1,
- 1, 1, 1, 1, 0);
+ &BTRFS_I(inode)->io_tree,
+ start, end, NULL,
+ EXTENT_CLEAR_UNLOCK_PAGE |
+ EXTENT_CLEAR_UNLOCK |
+ EXTENT_CLEAR_DELALLOC |
+ EXTENT_CLEAR_ACCOUNTING |
+ EXTENT_CLEAR_DIRTY |
+ EXTENT_SET_WRITEBACK |
+ EXTENT_END_WRITEBACK);
*nr_written = *nr_written +
(end - start + PAGE_CACHE_SIZE) / PAGE_CACHE_SIZE;
*page_started = 1;
em = search_extent_mapping(&BTRFS_I(inode)->extent_tree,
start, num_bytes);
if (em) {
- alloc_hint = em->block_start;
- free_extent_map(em);
+ /*
+ * if block start isn't an actual block number then find the
+ * first block in this inode and use that as a hint. If that
+ * block is also bogus then just don't worry about it.
+ */
+ if (em->block_start >= EXTENT_MAP_LAST_BYTE) {
+ free_extent_map(em);
+ em = search_extent_mapping(em_tree, 0, 0);
+ if (em && em->block_start < EXTENT_MAP_LAST_BYTE)
+ alloc_hint = em->block_start;
+ if (em)
+ free_extent_map(em);
+ } else {
+ alloc_hint = em->block_start;
+ free_extent_map(em);
+ }
}
read_unlock(&BTRFS_I(inode)->extent_tree.lock);
btrfs_drop_extent_cache(inode, start, start + num_bytes - 1, 0);
while (disk_num_bytes > 0) {
+ unsigned long op;
+
cur_alloc_size = min(disk_num_bytes, root->fs_info->max_extent);
ret = btrfs_reserve_extent(trans, root, cur_alloc_size,
root->sectorsize, 0, alloc_hint,
* Do set the Private2 bit so we know this page was properly
* setup for writepage
*/
+ op = unlock ? EXTENT_CLEAR_UNLOCK_PAGE : 0;
+ op |= EXTENT_CLEAR_UNLOCK | EXTENT_CLEAR_DELALLOC |
+ EXTENT_SET_PRIVATE2;
+
extent_clear_unlock_delalloc(inode, &BTRFS_I(inode)->io_tree,
start, start + ram_size - 1,
- locked_page, unlock, 1,
- 1, 0, 0, 0, 1);
+ locked_page, op);
disk_num_bytes -= cur_alloc_size;
num_bytes -= cur_alloc_size;
alloc_hint = ins.objectid + ins.offset;
u64 cur_end;
int limit = 10 * 1024 * 1042;
- clear_extent_bit(&BTRFS_I(inode)->io_tree, start, end, EXTENT_LOCKED |
- EXTENT_DELALLOC, 1, 0, NULL, GFP_NOFS);
+ clear_extent_bit(&BTRFS_I(inode)->io_tree, start, end, EXTENT_LOCKED,
+ 1, 0, NULL, GFP_NOFS);
while (start < end) {
async_cow = kmalloc(sizeof(*async_cow), GFP_NOFS);
async_cow->inode = inode;
if (found_key.offset > cur_offset) {
extent_end = found_key.offset;
+ extent_type = 0;
goto out_check;
}
BUG_ON(ret);
extent_clear_unlock_delalloc(inode, &BTRFS_I(inode)->io_tree,
- cur_offset, cur_offset + num_bytes - 1,
- locked_page, 1, 1, 1, 0, 0, 0, 1);
+ cur_offset, cur_offset + num_bytes - 1,
+ locked_page, EXTENT_CLEAR_UNLOCK_PAGE |
+ EXTENT_CLEAR_UNLOCK | EXTENT_CLEAR_DELALLOC |
+ EXTENT_SET_PRIVATE2);
cur_offset = extent_end;
if (cur_offset > end)
break;
return ret;
}
+static int btrfs_split_extent_hook(struct inode *inode,
+ struct extent_state *orig, u64 split)
+{
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ u64 size;
+
+ if (!(orig->state & EXTENT_DELALLOC))
+ return 0;
+
+ size = orig->end - orig->start + 1;
+ if (size > root->fs_info->max_extent) {
+ u64 num_extents;
+ u64 new_size;
+
+ new_size = orig->end - split + 1;
+ num_extents = div64_u64(size + root->fs_info->max_extent - 1,
+ root->fs_info->max_extent);
+
+ /*
+ * if we break a large extent up then leave oustanding_extents
+ * be, since we've already accounted for the large extent.
+ */
+ if (div64_u64(new_size + root->fs_info->max_extent - 1,
+ root->fs_info->max_extent) < num_extents)
+ return 0;
+ }
+
+ spin_lock(&BTRFS_I(inode)->accounting_lock);
+ BTRFS_I(inode)->outstanding_extents++;
+ spin_unlock(&BTRFS_I(inode)->accounting_lock);
+
+ return 0;
+}
+
+/*
+ * extent_io.c merge_extent_hook, used to track merged delayed allocation
+ * extents so we can keep track of new extents that are just merged onto old
+ * extents, such as when we are doing sequential writes, so we can properly
+ * account for the metadata space we'll need.
+ */
+static int btrfs_merge_extent_hook(struct inode *inode,
+ struct extent_state *new,
+ struct extent_state *other)
+{
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ u64 new_size, old_size;
+ u64 num_extents;
+
+ /* not delalloc, ignore it */
+ if (!(other->state & EXTENT_DELALLOC))
+ return 0;
+
+ old_size = other->end - other->start + 1;
+ if (new->start < other->start)
+ new_size = other->end - new->start + 1;
+ else
+ new_size = new->end - other->start + 1;
+
+ /* we're not bigger than the max, unreserve the space and go */
+ if (new_size <= root->fs_info->max_extent) {
+ spin_lock(&BTRFS_I(inode)->accounting_lock);
+ BTRFS_I(inode)->outstanding_extents--;
+ spin_unlock(&BTRFS_I(inode)->accounting_lock);
+ return 0;
+ }
+
+ /*
+ * If we grew by another max_extent, just return, we want to keep that
+ * reserved amount.
+ */
+ num_extents = div64_u64(old_size + root->fs_info->max_extent - 1,
+ root->fs_info->max_extent);
+ if (div64_u64(new_size + root->fs_info->max_extent - 1,
+ root->fs_info->max_extent) > num_extents)
+ return 0;
+
+ spin_lock(&BTRFS_I(inode)->accounting_lock);
+ BTRFS_I(inode)->outstanding_extents--;
+ spin_unlock(&BTRFS_I(inode)->accounting_lock);
+
+ return 0;
+}
+
/*
* extent_io.c set_bit_hook, used to track delayed allocation
* bytes in this file, and to maintain the list of inodes that
static int btrfs_set_bit_hook(struct inode *inode, u64 start, u64 end,
unsigned long old, unsigned long bits)
{
+
/*
* set_bit and clear bit hooks normally require _irqsave/restore
* but in this case, we are only testeing for the DELALLOC
*/
if (!(old & EXTENT_DELALLOC) && (bits & EXTENT_DELALLOC)) {
struct btrfs_root *root = BTRFS_I(inode)->root;
+
+ spin_lock(&BTRFS_I(inode)->accounting_lock);
+ BTRFS_I(inode)->outstanding_extents++;
+ spin_unlock(&BTRFS_I(inode)->accounting_lock);
btrfs_delalloc_reserve_space(root, inode, end - start + 1);
spin_lock(&root->fs_info->delalloc_lock);
BTRFS_I(inode)->delalloc_bytes += end - start + 1;
/*
* extent_io.c clear_bit_hook, see set_bit_hook for why
*/
-static int btrfs_clear_bit_hook(struct inode *inode, u64 start, u64 end,
- unsigned long old, unsigned long bits)
+static int btrfs_clear_bit_hook(struct inode *inode,
+ struct extent_state *state, unsigned long bits)
{
/*
* set_bit and clear bit hooks normally require _irqsave/restore
* but in this case, we are only testeing for the DELALLOC
* bit, which is only set or cleared with irqs on
*/
- if ((old & EXTENT_DELALLOC) && (bits & EXTENT_DELALLOC)) {
+ if ((state->state & EXTENT_DELALLOC) && (bits & EXTENT_DELALLOC)) {
struct btrfs_root *root = BTRFS_I(inode)->root;
+ if (bits & EXTENT_DO_ACCOUNTING) {
+ spin_lock(&BTRFS_I(inode)->accounting_lock);
+ BTRFS_I(inode)->outstanding_extents--;
+ spin_unlock(&BTRFS_I(inode)->accounting_lock);
+ btrfs_unreserve_metadata_for_delalloc(root, inode, 1);
+ }
+
spin_lock(&root->fs_info->delalloc_lock);
- if (end - start + 1 > root->fs_info->delalloc_bytes) {
+ if (state->end - state->start + 1 >
+ root->fs_info->delalloc_bytes) {
printk(KERN_INFO "btrfs warning: delalloc account "
"%llu %llu\n",
- (unsigned long long)end - start + 1,
+ (unsigned long long)
+ state->end - state->start + 1,
(unsigned long long)
root->fs_info->delalloc_bytes);
btrfs_delalloc_free_space(root, inode, (u64)-1);
BTRFS_I(inode)->delalloc_bytes = 0;
} else {
btrfs_delalloc_free_space(root, inode,
- end - start + 1);
- root->fs_info->delalloc_bytes -= end - start + 1;
- BTRFS_I(inode)->delalloc_bytes -= end - start + 1;
+ state->end -
+ state->start + 1);
+ root->fs_info->delalloc_bytes -= state->end -
+ state->start + 1;
+ BTRFS_I(inode)->delalloc_bytes -= state->end -
+ state->start + 1;
}
if (BTRFS_I(inode)->delalloc_bytes == 0 &&
!list_empty(&BTRFS_I(inode)->delalloc_inodes)) {
if ((offset & (blocksize - 1)) == 0)
goto out;
+ ret = btrfs_check_data_free_space(root, inode, PAGE_CACHE_SIZE);
+ if (ret)
+ goto out;
+
+ ret = btrfs_reserve_metadata_for_delalloc(root, inode, 1);
+ if (ret)
+ goto out;
ret = -ENOMEM;
again:
page = grab_cache_page(mapping, index);
- if (!page)
+ if (!page) {
+ btrfs_free_reserved_data_space(root, inode, PAGE_CACHE_SIZE);
+ btrfs_unreserve_metadata_for_delalloc(root, inode, 1);
goto out;
+ }
page_start = page_offset(page);
page_end = page_start + PAGE_CACHE_SIZE - 1;
goto again;
}
- btrfs_set_extent_delalloc(inode, page_start, page_end);
+ clear_extent_bits(&BTRFS_I(inode)->io_tree, page_start, page_end,
+ EXTENT_DIRTY | EXTENT_DELALLOC | EXTENT_DO_ACCOUNTING,
+ GFP_NOFS);
+
+ ret = btrfs_set_extent_delalloc(inode, page_start, page_end);
+ if (ret) {
+ unlock_extent(io_tree, page_start, page_end, GFP_NOFS);
+ goto out_unlock;
+ }
+
ret = 0;
if (offset != PAGE_CACHE_SIZE) {
kaddr = kmap(page);
unlock_extent(io_tree, page_start, page_end, GFP_NOFS);
out_unlock:
+ if (ret)
+ btrfs_free_reserved_data_space(root, inode, PAGE_CACHE_SIZE);
+ btrfs_unreserve_metadata_for_delalloc(root, inode, 1);
unlock_page(page);
page_cache_release(page);
out:
u64 last_byte;
u64 cur_offset;
u64 hole_size;
- int err;
+ int err = 0;
if (size <= hole_start)
return 0;
- err = btrfs_check_metadata_free_space(root);
+ err = btrfs_truncate_page(inode->i_mapping, inode->i_size);
if (err)
return err;
- btrfs_truncate_page(inode->i_mapping, inode->i_size);
-
while (1) {
struct btrfs_ordered_extent *ordered;
btrfs_wait_ordered_range(inode, hole_start,
cur_offset, &hint_byte, 1);
if (err)
break;
+
+ err = btrfs_reserve_metadata_space(root, 1);
+ if (err)
+ break;
+
err = btrfs_insert_file_extent(trans, root,
inode->i_ino, cur_offset, 0,
0, hole_size, 0, hole_size,
0, 0, 0);
btrfs_drop_extent_cache(inode, hole_start,
last_byte - 1, 0);
+ btrfs_unreserve_metadata_space(root, 1);
}
free_extent_map(em);
cur_offset = last_byte;
}
btrfs_wait_ordered_range(inode, 0, (u64)-1);
+ if (inode->i_nlink > 0) {
+ BUG_ON(btrfs_root_refs(&root->root_item) != 0);
+ goto no_delete;
+ }
+
btrfs_i_size_write(inode, 0);
trans = btrfs_join_transaction(root, 1);
struct btrfs_inode *entry;
struct rb_node **p;
struct rb_node *parent;
-
again:
p = &root->inode_tree.rb_node;
parent = NULL;
+ if (hlist_unhashed(&inode->i_hash))
+ return;
+
spin_lock(&root->inode_lock);
while (*p) {
parent = *p;
static void inode_tree_del(struct inode *inode)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
+ int empty = 0;
spin_lock(&root->inode_lock);
if (!RB_EMPTY_NODE(&BTRFS_I(inode)->rb_node)) {
rb_erase(&BTRFS_I(inode)->rb_node, &root->inode_tree);
RB_CLEAR_NODE(&BTRFS_I(inode)->rb_node);
+ empty = RB_EMPTY_ROOT(&root->inode_tree);
}
spin_unlock(&root->inode_lock);
+
+ if (empty && btrfs_root_refs(&root->root_item) == 0) {
+ synchronize_srcu(&root->fs_info->subvol_srcu);
+ spin_lock(&root->inode_lock);
+ empty = RB_EMPTY_ROOT(&root->inode_tree);
+ spin_unlock(&root->inode_lock);
+ if (empty)
+ btrfs_add_dead_root(root);
+ }
+}
+
+int btrfs_invalidate_inodes(struct btrfs_root *root)
+{
+ struct rb_node *node;
+ struct rb_node *prev;
+ struct btrfs_inode *entry;
+ struct inode *inode;
+ u64 objectid = 0;
+
+ WARN_ON(btrfs_root_refs(&root->root_item) != 0);
+
+ spin_lock(&root->inode_lock);
+again:
+ node = root->inode_tree.rb_node;
+ prev = NULL;
+ while (node) {
+ prev = node;
+ entry = rb_entry(node, struct btrfs_inode, rb_node);
+
+ if (objectid < entry->vfs_inode.i_ino)
+ node = node->rb_left;
+ else if (objectid > entry->vfs_inode.i_ino)
+ node = node->rb_right;
+ else
+ break;
+ }
+ if (!node) {
+ while (prev) {
+ entry = rb_entry(prev, struct btrfs_inode, rb_node);
+ if (objectid <= entry->vfs_inode.i_ino) {
+ node = prev;
+ break;
+ }
+ prev = rb_next(prev);
+ }
+ }
+ while (node) {
+ entry = rb_entry(node, struct btrfs_inode, rb_node);
+ objectid = entry->vfs_inode.i_ino + 1;
+ inode = igrab(&entry->vfs_inode);
+ if (inode) {
+ spin_unlock(&root->inode_lock);
+ if (atomic_read(&inode->i_count) > 1)
+ d_prune_aliases(inode);
+ /*
+ * btrfs_drop_inode will remove it from
+ * the inode cache when its usage count
+ * hits zero.
+ */
+ iput(inode);
+ cond_resched();
+ spin_lock(&root->inode_lock);
+ goto again;
+ }
+
+ if (cond_resched_lock(&root->inode_lock))
+ goto again;
+
+ node = rb_next(node);
+ }
+ spin_unlock(&root->inode_lock);
+ return 0;
}
static noinline void init_btrfs_i(struct inode *inode)
bi->generation = 0;
bi->sequence = 0;
bi->last_trans = 0;
+ bi->last_sub_trans = 0;
bi->logged_trans = 0;
bi->delalloc_bytes = 0;
bi->reserved_bytes = 0;
struct btrfs_root *root = BTRFS_I(dir)->root;
struct btrfs_root *sub_root = root;
struct btrfs_key location;
+ int index;
int ret;
+ dentry->d_op = &btrfs_dentry_operations;
+
if (dentry->d_name.len > BTRFS_NAME_LEN)
return ERR_PTR(-ENAMETOOLONG);
BUG_ON(location.type != BTRFS_ROOT_ITEM_KEY);
+ index = srcu_read_lock(&root->fs_info->subvol_srcu);
ret = fixup_tree_root_location(root, dir, dentry,
&location, &sub_root);
if (ret < 0) {
} else {
inode = btrfs_iget(dir->i_sb, &location, sub_root);
}
+ srcu_read_unlock(&root->fs_info->subvol_srcu, index);
+
return inode;
}
+static int btrfs_dentry_delete(struct dentry *dentry)
+{
+ struct btrfs_root *root;
+
+ if (!dentry->d_inode && !IS_ROOT(dentry))
+ dentry = dentry->d_parent;
+
+ if (dentry->d_inode) {
+ root = BTRFS_I(dentry->d_inode)->root;
+ if (btrfs_root_refs(&root->root_item) == 0)
+ return 1;
+ }
+ return 0;
+}
+
static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry,
struct nameidata *nd)
{
if (!new_valid_dev(rdev))
return -EINVAL;
- err = btrfs_check_metadata_free_space(root);
+ /*
+ * 2 for inode item and ref
+ * 2 for dir items
+ * 1 for xattr if selinux is on
+ */
+ err = btrfs_reserve_metadata_space(root, 5);
if (err)
- goto fail;
+ return err;
trans = btrfs_start_transaction(root, 1);
+ if (!trans)
+ goto fail;
btrfs_set_trans_block_group(trans, dir);
err = btrfs_find_free_objectid(trans, root, dir->i_ino, &objectid);
nr = trans->blocks_used;
btrfs_end_transaction_throttle(trans, root);
fail:
+ btrfs_unreserve_metadata_space(root, 5);
if (drop_inode) {
inode_dec_link_count(inode);
iput(inode);
u64 objectid;
u64 index = 0;
- err = btrfs_check_metadata_free_space(root);
+ /*
+ * 2 for inode item and ref
+ * 2 for dir items
+ * 1 for xattr if selinux is on
+ */
+ err = btrfs_reserve_metadata_space(root, 5);
if (err)
- goto fail;
+ return err;
+
trans = btrfs_start_transaction(root, 1);
+ if (!trans)
+ goto fail;
btrfs_set_trans_block_group(trans, dir);
err = btrfs_find_free_objectid(trans, root, dir->i_ino, &objectid);
nr = trans->blocks_used;
btrfs_end_transaction_throttle(trans, root);
fail:
+ btrfs_unreserve_metadata_space(root, 5);
if (drop_inode) {
inode_dec_link_count(inode);
iput(inode);
if (inode->i_nlink == 0)
return -ENOENT;
- btrfs_inc_nlink(inode);
- err = btrfs_check_metadata_free_space(root);
+ /*
+ * 1 item for inode ref
+ * 2 items for dir items
+ */
+ err = btrfs_reserve_metadata_space(root, 3);
if (err)
- goto fail;
+ return err;
+
+ btrfs_inc_nlink(inode);
+
err = btrfs_set_inode_index(dir, &index);
if (err)
goto fail;
err = btrfs_add_nondir(trans, dentry, inode, 1, index);
- if (err)
- drop_inode = 1;
-
- btrfs_update_inode_block_group(trans, dir);
- err = btrfs_update_inode(trans, root, inode);
-
- if (err)
+ if (err) {
drop_inode = 1;
+ } else {
+ btrfs_update_inode_block_group(trans, dir);
+ err = btrfs_update_inode(trans, root, inode);
+ BUG_ON(err);
+ btrfs_log_new_name(trans, inode, NULL, dentry->d_parent);
+ }
nr = trans->blocks_used;
-
- btrfs_log_new_name(trans, inode, NULL, dentry->d_parent);
btrfs_end_transaction_throttle(trans, root);
fail:
+ btrfs_unreserve_metadata_space(root, 3);
if (drop_inode) {
inode_dec_link_count(inode);
iput(inode);
u64 index = 0;
unsigned long nr = 1;
- err = btrfs_check_metadata_free_space(root);
+ /*
+ * 2 items for inode and ref
+ * 2 items for dir items
+ * 1 for xattr if selinux is on
+ */
+ err = btrfs_reserve_metadata_space(root, 5);
if (err)
- goto out_unlock;
+ return err;
trans = btrfs_start_transaction(root, 1);
- btrfs_set_trans_block_group(trans, dir);
-
- if (IS_ERR(trans)) {
- err = PTR_ERR(trans);
+ if (!trans) {
+ err = -ENOMEM;
goto out_unlock;
}
+ btrfs_set_trans_block_group(trans, dir);
err = btrfs_find_free_objectid(trans, root, dir->i_ino, &objectid);
if (err) {
btrfs_end_transaction_throttle(trans, root);
out_unlock:
+ btrfs_unreserve_metadata_space(root, 5);
if (drop_on_err)
iput(inode);
btrfs_btree_balance_dirty(root, nr);
*/
clear_extent_bit(tree, page_start, page_end,
EXTENT_DIRTY | EXTENT_DELALLOC |
- EXTENT_LOCKED, 1, 0, NULL, GFP_NOFS);
+ EXTENT_LOCKED | EXTENT_DO_ACCOUNTING, 1, 0,
+ NULL, GFP_NOFS);
/*
* whoever cleared the private bit is responsible
* for the finish_ordered_io
lock_extent(tree, page_start, page_end, GFP_NOFS);
}
clear_extent_bit(tree, page_start, page_end,
- EXTENT_LOCKED | EXTENT_DIRTY | EXTENT_DELALLOC,
- 1, 1, NULL, GFP_NOFS);
+ EXTENT_LOCKED | EXTENT_DIRTY | EXTENT_DELALLOC |
+ EXTENT_DO_ACCOUNTING, 1, 1, NULL, GFP_NOFS);
__btrfs_releasepage(page, GFP_NOFS);
ClearPageChecked(page);
goto out;
}
+ ret = btrfs_reserve_metadata_for_delalloc(root, inode, 1);
+ if (ret) {
+ btrfs_free_reserved_data_space(root, inode, PAGE_CACHE_SIZE);
+ ret = VM_FAULT_SIGBUS;
+ goto out;
+ }
+
ret = VM_FAULT_NOPAGE; /* make the VM retry the fault */
again:
lock_page(page);
goto again;
}
- btrfs_set_extent_delalloc(inode, page_start, page_end);
+ /*
+ * XXX - page_mkwrite gets called every time the page is dirtied, even
+ * if it was already dirty, so for space accounting reasons we need to
+ * clear any delalloc bits for the range we are fixing to save. There
+ * is probably a better way to do this, but for now keep consistent with
+ * prepare_pages in the normal write path.
+ */
+ clear_extent_bits(&BTRFS_I(inode)->io_tree, page_start, page_end,
+ EXTENT_DIRTY | EXTENT_DELALLOC | EXTENT_DO_ACCOUNTING,
+ GFP_NOFS);
+
+ ret = btrfs_set_extent_delalloc(inode, page_start, page_end);
+ if (ret) {
+ unlock_extent(io_tree, page_start, page_end, GFP_NOFS);
+ ret = VM_FAULT_SIGBUS;
+ btrfs_free_reserved_data_space(root, inode, PAGE_CACHE_SIZE);
+ goto out_unlock;
+ }
ret = 0;
/* page is wholly or partially inside EOF */
set_page_dirty(page);
SetPageUptodate(page);
- BTRFS_I(inode)->last_trans = root->fs_info->generation + 1;
+ BTRFS_I(inode)->last_trans = root->fs_info->generation;
+ BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid;
+
unlock_extent(io_tree, page_start, page_end, GFP_NOFS);
out_unlock:
+ btrfs_unreserve_metadata_for_delalloc(root, inode, 1);
if (!ret)
return VM_FAULT_LOCKED;
unlock_page(page);
if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
return;
- btrfs_truncate_page(inode->i_mapping, inode->i_size);
+ ret = btrfs_truncate_page(inode->i_mapping, inode->i_size);
+ if (ret)
+ return;
btrfs_wait_ordered_range(inode, inode->i_size & (~mask), (u64)-1);
trans = btrfs_start_transaction(root, 1);
* create a new subvolume directory/inode (helper for the ioctl).
*/
int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
- struct btrfs_root *new_root, struct dentry *dentry,
+ struct btrfs_root *new_root,
u64 new_dirid, u64 alloc_hint)
{
struct inode *inode;
- int error;
+ int err;
u64 index = 0;
inode = btrfs_new_inode(trans, new_root, NULL, "..", 2, new_dirid,
inode->i_nlink = 1;
btrfs_i_size_write(inode, 0);
- error = btrfs_update_inode(trans, new_root, inode);
- if (error)
- return error;
+ err = btrfs_update_inode(trans, new_root, inode);
+ BUG_ON(err);
- d_instantiate(dentry, inode);
+ iput(inode);
return 0;
}
if (!ei)
return NULL;
ei->last_trans = 0;
+ ei->last_sub_trans = 0;
ei->logged_trans = 0;
+ ei->outstanding_extents = 0;
+ ei->reserved_extents = 0;
+ spin_lock_init(&ei->accounting_lock);
btrfs_ordered_inode_tree_init(&ei->ordered_tree);
INIT_LIST_HEAD(&ei->i_orphan);
INIT_LIST_HEAD(&ei->ordered_operations);
kmem_cache_free(btrfs_inode_cachep, BTRFS_I(inode));
}
+void btrfs_drop_inode(struct inode *inode)
+{
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+
+ if (inode->i_nlink > 0 && btrfs_root_refs(&root->root_item) == 0)
+ generic_delete_inode(inode);
+ else
+ generic_drop_inode(inode);
+}
+
static void init_once(void *foo)
{
struct btrfs_inode *ei = (struct btrfs_inode *) foo;
u64 root_objectid;
int ret;
+ if (new_dir->i_ino == BTRFS_EMPTY_SUBVOL_DIR_OBJECTID)
+ return -EPERM;
+
/* we only allow rename subvolume link between subvolumes */
if (old_inode->i_ino != BTRFS_FIRST_FREE_OBJECTID && root != dest)
return -EXDEV;
new_inode->i_size > BTRFS_EMPTY_DIR_SIZE)
return -ENOTEMPTY;
- ret = btrfs_check_metadata_free_space(root);
+ /*
+ * 2 items for dir items
+ * 1 item for orphan entry
+ * 1 item for ref
+ */
+ ret = btrfs_reserve_metadata_space(root, 4);
if (ret)
return ret;
old_inode->i_size > BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT)
filemap_flush(old_inode->i_mapping);
+ /* close the racy window with snapshot create/destroy ioctl */
+ if (old_inode->i_ino == BTRFS_FIRST_FREE_OBJECTID)
+ down_read(&root->fs_info->subvol_sem);
+
trans = btrfs_start_transaction(root, 1);
+ btrfs_set_trans_block_group(trans, new_dir);
if (dest != root)
btrfs_record_root_in_trans(trans, dest);
- /*
- * make sure the inode gets flushed if it is replacing
- * something.
- */
- if (new_inode && new_inode->i_size &&
- old_inode && S_ISREG(old_inode->i_mode)) {
- btrfs_add_ordered_operation(trans, root, old_inode);
- }
+ ret = btrfs_set_inode_index(new_dir, &index);
+ if (ret)
+ goto out_fail;
- if (old_inode->i_ino == BTRFS_FIRST_FREE_OBJECTID) {
+ if (unlikely(old_inode->i_ino == BTRFS_FIRST_FREE_OBJECTID)) {
/* force full log commit if subvolume involved. */
root->fs_info->last_trans_log_full_commit = trans->transid;
} else {
+ ret = btrfs_insert_inode_ref(trans, dest,
+ new_dentry->d_name.name,
+ new_dentry->d_name.len,
+ old_inode->i_ino,
+ new_dir->i_ino, index);
+ if (ret)
+ goto out_fail;
/*
* this is an ugly little race, but the rename is required
* to make sure that if we crash, the inode is either at the
*/
btrfs_pin_log_trans(root);
}
-
- btrfs_set_trans_block_group(trans, new_dir);
+ /*
+ * make sure the inode gets flushed if it is replacing
+ * something.
+ */
+ if (new_inode && new_inode->i_size &&
+ old_inode && S_ISREG(old_inode->i_mode)) {
+ btrfs_add_ordered_operation(trans, root, old_inode);
+ }
old_dir->i_ctime = old_dir->i_mtime = ctime;
new_dir->i_ctime = new_dir->i_mtime = ctime;
BUG_ON(ret);
}
}
- ret = btrfs_set_inode_index(new_dir, &index);
- BUG_ON(ret);
ret = btrfs_add_link(trans, new_dir, old_inode,
new_dentry->d_name.name,
- new_dentry->d_name.len, 1, index);
+ new_dentry->d_name.len, 0, index);
BUG_ON(ret);
if (old_inode->i_ino != BTRFS_FIRST_FREE_OBJECTID) {
new_dentry->d_parent);
btrfs_end_log_trans(root);
}
-
+out_fail:
btrfs_end_transaction_throttle(trans, root);
+ if (old_inode->i_ino == BTRFS_FIRST_FREE_OBJECTID)
+ up_read(&root->fs_info->subvol_sem);
+
+ btrfs_unreserve_metadata_space(root, 4);
return ret;
}
if (name_len > BTRFS_MAX_INLINE_DATA_SIZE(root))
return -ENAMETOOLONG;
- err = btrfs_check_metadata_free_space(root);
+ /*
+ * 2 items for inode item and ref
+ * 2 items for dir items
+ * 1 item for xattr if selinux is on
+ */
+ err = btrfs_reserve_metadata_space(root, 5);
if (err)
- goto out_fail;
+ return err;
trans = btrfs_start_transaction(root, 1);
+ if (!trans)
+ goto out_fail;
btrfs_set_trans_block_group(trans, dir);
err = btrfs_find_free_objectid(trans, root, dir->i_ino, &objectid);
nr = trans->blocks_used;
btrfs_end_transaction_throttle(trans, root);
out_fail:
+ btrfs_unreserve_metadata_space(root, 5);
if (drop_inode) {
inode_dec_link_count(inode);
iput(inode);
while (num_bytes > 0) {
alloc_size = min(num_bytes, root->fs_info->max_extent);
+
+ ret = btrfs_reserve_metadata_space(root, 1);
+ if (ret)
+ goto out;
+
ret = btrfs_reserve_extent(trans, root, alloc_size,
root->sectorsize, 0, alloc_hint,
(u64)-1, &ins, 1);
num_bytes -= ins.offset;
cur_offset += ins.offset;
alloc_hint = ins.objectid + ins.offset;
+ btrfs_unreserve_metadata_space(root, 1);
}
out:
if (cur_offset > start) {
.lookup = btrfs_lookup,
.permission = btrfs_permission,
};
+
static struct file_operations btrfs_dir_file_operations = {
.llseek = generic_file_llseek,
.read = generic_read_dir,
.readpage_io_failed_hook = btrfs_io_failed_hook,
.set_bit_hook = btrfs_set_bit_hook,
.clear_bit_hook = btrfs_clear_bit_hook,
+ .merge_extent_hook = btrfs_merge_extent_hook,
+ .split_extent_hook = btrfs_split_extent_hook,
};
/*
.listxattr = btrfs_listxattr,
.removexattr = btrfs_removexattr,
};
+
+const struct dentry_operations btrfs_dentry_operations = {
+ .d_delete = btrfs_dentry_delete,
+};
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff