u64 orig_block_len, u64 ram_bytes,
int type);
+static int btrfs_dirty_inode(struct inode *inode);
+
static int btrfs_init_inode_security(struct btrfs_trans_handle *trans,
struct inode *inode, struct inode *dir,
const struct qstr *qstr)
async_extent->ram_size - 1, 0);
em = alloc_extent_map();
- if (!em)
+ if (!em) {
+ ret = -ENOMEM;
goto out_free_reserve;
+ }
em->start = async_extent->start;
em->len = async_extent->ram_size;
em->orig_start = em->start;
}
em = alloc_extent_map();
- BUG_ON(!em); /* -ENOMEM */
+ if (!em) {
+ ret = -ENOMEM;
+ goto out_reserve;
+ }
em->start = start;
em->orig_start = em->start;
ram_size = ins.offset;
btrfs_drop_extent_cache(inode, start,
start + ram_size - 1, 0);
}
+ if (ret)
+ goto out_reserve;
cur_alloc_size = ins.offset;
ret = btrfs_add_ordered_extent(inode, start, ins.objectid,
ram_size, cur_alloc_size, 0);
- BUG_ON(ret); /* -ENOMEM */
+ if (ret)
+ goto out_reserve;
if (root->root_key.objectid ==
BTRFS_DATA_RELOC_TREE_OBJECTID) {
cur_alloc_size);
if (ret) {
btrfs_abort_transaction(trans, root, ret);
- goto out_unlock;
+ goto out_reserve;
}
}
out:
return ret;
+out_reserve:
+ btrfs_free_reserved_extent(root, ins.objectid, ins.offset);
out_unlock:
extent_clear_unlock_delalloc(inode,
&BTRFS_I(inode)->io_tree,
spin_unlock(&BTRFS_I(inode)->lock);
}
+static void btrfs_add_delalloc_inodes(struct btrfs_root *root,
+ struct inode *inode)
+{
+ spin_lock(&root->delalloc_lock);
+ if (list_empty(&BTRFS_I(inode)->delalloc_inodes)) {
+ list_add_tail(&BTRFS_I(inode)->delalloc_inodes,
+ &root->delalloc_inodes);
+ set_bit(BTRFS_INODE_IN_DELALLOC_LIST,
+ &BTRFS_I(inode)->runtime_flags);
+ root->nr_delalloc_inodes++;
+ if (root->nr_delalloc_inodes == 1) {
+ spin_lock(&root->fs_info->delalloc_root_lock);
+ BUG_ON(!list_empty(&root->delalloc_root));
+ list_add_tail(&root->delalloc_root,
+ &root->fs_info->delalloc_roots);
+ spin_unlock(&root->fs_info->delalloc_root_lock);
+ }
+ }
+ spin_unlock(&root->delalloc_lock);
+}
+
+static void btrfs_del_delalloc_inode(struct btrfs_root *root,
+ struct inode *inode)
+{
+ spin_lock(&root->delalloc_lock);
+ if (!list_empty(&BTRFS_I(inode)->delalloc_inodes)) {
+ list_del_init(&BTRFS_I(inode)->delalloc_inodes);
+ clear_bit(BTRFS_INODE_IN_DELALLOC_LIST,
+ &BTRFS_I(inode)->runtime_flags);
+ root->nr_delalloc_inodes--;
+ if (!root->nr_delalloc_inodes) {
+ spin_lock(&root->fs_info->delalloc_root_lock);
+ BUG_ON(list_empty(&root->delalloc_root));
+ list_del_init(&root->delalloc_root);
+ spin_unlock(&root->fs_info->delalloc_root_lock);
+ }
+ }
+ spin_unlock(&root->delalloc_lock);
+}
+
/*
* extent_io.c set_bit_hook, used to track delayed allocation
* bytes in this file, and to maintain the list of inodes that
* have pending delalloc work to be done.
*/
static void btrfs_set_bit_hook(struct inode *inode,
- struct extent_state *state, int *bits)
+ struct extent_state *state, unsigned long *bits)
{
/*
spin_lock(&BTRFS_I(inode)->lock);
BTRFS_I(inode)->delalloc_bytes += len;
if (do_list && !test_bit(BTRFS_INODE_IN_DELALLOC_LIST,
- &BTRFS_I(inode)->runtime_flags)) {
- spin_lock(&root->fs_info->delalloc_lock);
- if (list_empty(&BTRFS_I(inode)->delalloc_inodes)) {
- list_add_tail(&BTRFS_I(inode)->delalloc_inodes,
- &root->fs_info->delalloc_inodes);
- set_bit(BTRFS_INODE_IN_DELALLOC_LIST,
- &BTRFS_I(inode)->runtime_flags);
- }
- spin_unlock(&root->fs_info->delalloc_lock);
- }
+ &BTRFS_I(inode)->runtime_flags))
+ btrfs_add_delalloc_inodes(root, inode);
spin_unlock(&BTRFS_I(inode)->lock);
}
}
* extent_io.c clear_bit_hook, see set_bit_hook for why
*/
static void btrfs_clear_bit_hook(struct inode *inode,
- struct extent_state *state, int *bits)
+ struct extent_state *state,
+ unsigned long *bits)
{
/*
* set_bit and clear bit hooks normally require _irqsave/restore
BTRFS_I(inode)->delalloc_bytes -= len;
if (do_list && BTRFS_I(inode)->delalloc_bytes == 0 &&
test_bit(BTRFS_INODE_IN_DELALLOC_LIST,
- &BTRFS_I(inode)->runtime_flags)) {
- spin_lock(&root->fs_info->delalloc_lock);
- if (!list_empty(&BTRFS_I(inode)->delalloc_inodes)) {
- list_del_init(&BTRFS_I(inode)->delalloc_inodes);
- clear_bit(BTRFS_INODE_IN_DELALLOC_LIST,
- &BTRFS_I(inode)->runtime_flags);
- }
- spin_unlock(&root->fs_info->delalloc_lock);
- }
+ &BTRFS_I(inode)->runtime_flags))
+ btrfs_del_delalloc_inode(root, inode);
spin_unlock(&BTRFS_I(inode)->lock);
}
}
return 0;
return PTR_ERR(root);
}
- if (btrfs_root_refs(&root->root_item) == 0) {
- srcu_read_unlock(&fs_info->subvol_srcu, index);
- /* parse ENOENT to 0 */
- return 0;
- }
/* step 2: get inode */
key.objectid = backref->inum;
* We have done the truncate/delete so we can go ahead and remove the orphan
* item for this particular inode.
*/
-int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode)
+static int btrfs_orphan_del(struct btrfs_trans_handle *trans,
+ struct inode *inode)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
int delete_item = 0;
}
return ret;
}
-
-
-/* helper to check if there is any shared block in the path */
-static int check_path_shared(struct btrfs_root *root,
- struct btrfs_path *path)
-{
- struct extent_buffer *eb;
- int level;
- u64 refs = 1;
-
- for (level = 0; level < BTRFS_MAX_LEVEL; level++) {
- int ret;
-
- if (!path->nodes[level])
- break;
- eb = path->nodes[level];
- if (!btrfs_block_can_be_shared(root, eb))
- continue;
- ret = btrfs_lookup_extent_info(NULL, root, eb->start, level, 1,
- &refs, NULL);
- if (refs > 1)
- return 1;
- }
- return 0;
-}
/*
* helper to start transaction for unlink and rmdir.
*
- * unlink and rmdir are special in btrfs, they do not always free space.
- * so in enospc case, we should make sure they will free space before
- * allowing them to use the global metadata reservation.
+ * unlink and rmdir are special in btrfs, they do not always free space, so
+ * if we cannot make our reservations the normal way try and see if there is
+ * plenty of slack room in the global reserve to migrate, otherwise we cannot
+ * allow the unlink to occur.
*/
-static struct btrfs_trans_handle *__unlink_start_trans(struct inode *dir,
- struct dentry *dentry)
+static struct btrfs_trans_handle *__unlink_start_trans(struct inode *dir)
{
struct btrfs_trans_handle *trans;
struct btrfs_root *root = BTRFS_I(dir)->root;
- struct btrfs_path *path;
- struct btrfs_dir_item *di;
- struct inode *inode = dentry->d_inode;
- u64 index;
- int check_link = 1;
- int err = -ENOSPC;
int ret;
- u64 ino = btrfs_ino(inode);
- u64 dir_ino = btrfs_ino(dir);
/*
* 1 for the possible orphan item
if (!IS_ERR(trans) || PTR_ERR(trans) != -ENOSPC)
return trans;
- if (ino == BTRFS_EMPTY_SUBVOL_DIR_OBJECTID)
- return ERR_PTR(-ENOSPC);
-
- /* check if there is someone else holds reference */
- if (S_ISDIR(inode->i_mode) && atomic_read(&inode->i_count) > 1)
- return ERR_PTR(-ENOSPC);
-
- if (atomic_read(&inode->i_count) > 2)
- return ERR_PTR(-ENOSPC);
-
- if (xchg(&root->fs_info->enospc_unlink, 1))
- return ERR_PTR(-ENOSPC);
-
- path = btrfs_alloc_path();
- if (!path) {
- root->fs_info->enospc_unlink = 0;
- return ERR_PTR(-ENOMEM);
- }
-
- /* 1 for the orphan item */
- trans = btrfs_start_transaction(root, 1);
- if (IS_ERR(trans)) {
- btrfs_free_path(path);
- root->fs_info->enospc_unlink = 0;
- return trans;
- }
-
- path->skip_locking = 1;
- path->search_commit_root = 1;
-
- ret = btrfs_lookup_inode(trans, root, path,
- &BTRFS_I(dir)->location, 0);
- if (ret < 0) {
- err = ret;
- goto out;
- }
- if (ret == 0) {
- if (check_path_shared(root, path))
- goto out;
- } else {
- check_link = 0;
- }
- btrfs_release_path(path);
-
- ret = btrfs_lookup_inode(trans, root, path,
- &BTRFS_I(inode)->location, 0);
- if (ret < 0) {
- err = ret;
- goto out;
- }
- if (ret == 0) {
- if (check_path_shared(root, path))
- goto out;
- } else {
- check_link = 0;
- }
- btrfs_release_path(path);
+ if (PTR_ERR(trans) == -ENOSPC) {
+ u64 num_bytes = btrfs_calc_trans_metadata_size(root, 5);
- if (ret == 0 && S_ISREG(inode->i_mode)) {
- ret = btrfs_lookup_file_extent(trans, root, path,
- ino, (u64)-1, 0);
- if (ret < 0) {
- err = ret;
- goto out;
+ trans = btrfs_start_transaction(root, 0);
+ if (IS_ERR(trans))
+ return trans;
+ ret = btrfs_cond_migrate_bytes(root->fs_info,
+ &root->fs_info->trans_block_rsv,
+ num_bytes, 5);
+ if (ret) {
+ btrfs_end_transaction(trans, root);
+ return ERR_PTR(ret);
}
- BUG_ON(ret == 0); /* Corruption */
- if (check_path_shared(root, path))
- goto out;
- btrfs_release_path(path);
- }
-
- if (!check_link) {
- err = 0;
- goto out;
- }
-
- di = btrfs_lookup_dir_item(trans, root, path, dir_ino,
- dentry->d_name.name, dentry->d_name.len, 0);
- if (IS_ERR(di)) {
- err = PTR_ERR(di);
- goto out;
- }
- if (di) {
- if (check_path_shared(root, path))
- goto out;
- } else {
- err = 0;
- goto out;
- }
- btrfs_release_path(path);
-
- ret = btrfs_get_inode_ref_index(trans, root, path, dentry->d_name.name,
- dentry->d_name.len, ino, dir_ino, 0,
- &index);
- if (ret) {
- err = ret;
- goto out;
- }
-
- if (check_path_shared(root, path))
- goto out;
-
- btrfs_release_path(path);
-
- /*
- * This is a commit root search, if we can lookup inode item and other
- * relative items in the commit root, it means the transaction of
- * dir/file creation has been committed, and the dir index item that we
- * delay to insert has also been inserted into the commit root. So
- * we needn't worry about the delayed insertion of the dir index item
- * here.
- */
- di = btrfs_lookup_dir_index_item(trans, root, path, dir_ino, index,
- dentry->d_name.name, dentry->d_name.len, 0);
- if (IS_ERR(di)) {
- err = PTR_ERR(di);
- goto out;
- }
- BUG_ON(ret == -ENOENT);
- if (check_path_shared(root, path))
- goto out;
-
- err = 0;
-out:
- btrfs_free_path(path);
- /* Migrate the orphan reservation over */
- if (!err)
- err = btrfs_block_rsv_migrate(trans->block_rsv,
- &root->fs_info->global_block_rsv,
- trans->bytes_reserved);
-
- if (err) {
- btrfs_end_transaction(trans, root);
- root->fs_info->enospc_unlink = 0;
- return ERR_PTR(err);
- }
-
- trans->block_rsv = &root->fs_info->global_block_rsv;
- return trans;
-}
-
-static void __unlink_end_trans(struct btrfs_trans_handle *trans,
- struct btrfs_root *root)
-{
- if (trans->block_rsv->type == BTRFS_BLOCK_RSV_GLOBAL) {
- btrfs_block_rsv_release(root, trans->block_rsv,
- trans->bytes_reserved);
trans->block_rsv = &root->fs_info->trans_block_rsv;
- BUG_ON(!root->fs_info->enospc_unlink);
- root->fs_info->enospc_unlink = 0;
+ trans->bytes_reserved = num_bytes;
}
- btrfs_end_transaction(trans, root);
+ return trans;
}
static int btrfs_unlink(struct inode *dir, struct dentry *dentry)
struct inode *inode = dentry->d_inode;
int ret;
- trans = __unlink_start_trans(dir, dentry);
+ trans = __unlink_start_trans(dir);
if (IS_ERR(trans))
return PTR_ERR(trans);
}
out:
- __unlink_end_trans(trans, root);
+ btrfs_end_transaction(trans, root);
btrfs_btree_balance_dirty(root);
return ret;
}
if (btrfs_ino(inode) == BTRFS_FIRST_FREE_OBJECTID)
return -EPERM;
- trans = __unlink_start_trans(dir, dentry);
+ trans = __unlink_start_trans(dir);
if (IS_ERR(trans))
return PTR_ERR(trans);
if (!err)
btrfs_i_size_write(inode, 0);
out:
- __unlink_end_trans(trans, root);
+ btrfs_end_transaction(trans, root);
btrfs_btree_balance_dirty(root);
return err;
}
size =
btrfs_file_extent_calc_inline_size(size);
- btrfs_truncate_item(trans, root, path,
- size, 1);
+ btrfs_truncate_item(root, path, size, 1);
} else if (root->ref_cows) {
inode_sub_bytes(inode, item_end + 1 -
found_key.offset);
btrfs_end_transaction(trans, root);
btrfs_btree_balance_dirty(root);
no_delete:
+ btrfs_remove_delayed_node(inode);
clear_inode(inode);
return;
}
goto out;
}
- if (btrfs_root_refs(&new_root->root_item) == 0) {
- err = -ENOENT;
- goto out;
- }
-
*sub_root = new_root;
location->objectid = btrfs_root_dirid(&new_root->root_item);
location->type = BTRFS_INODE_ITEM_KEY;
struct rb_node **p;
struct rb_node *parent;
u64 ino = btrfs_ino(inode);
-again:
- p = &root->inode_tree.rb_node;
- parent = NULL;
if (inode_unhashed(inode))
return;
-
+again:
+ parent = NULL;
spin_lock(&root->inode_lock);
+ p = &root->inode_tree.rb_node;
while (*p) {
parent = *p;
entry = rb_entry(parent, struct btrfs_inode, rb_node);
* FIXME, needs more benchmarking...there are no reasons other than performance
* to keep or drop this code.
*/
-int btrfs_dirty_inode(struct inode *inode)
+static int btrfs_dirty_inode(struct inode *inode)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_trans_handle *trans;
* block must be cow'd
*/
static noinline int can_nocow_odirect(struct btrfs_trans_handle *trans,
- struct inode *inode, u64 offset, u64 len)
+ struct inode *inode, u64 offset, u64 *len,
+ u64 *orig_start, u64 *orig_block_len,
+ u64 *ram_bytes)
{
struct btrfs_path *path;
int ret;
disk_bytenr = btrfs_file_extent_disk_bytenr(leaf, fi);
backref_offset = btrfs_file_extent_offset(leaf, fi);
+ *orig_start = key.offset - backref_offset;
+ *orig_block_len = btrfs_file_extent_disk_num_bytes(leaf, fi);
+ *ram_bytes = btrfs_file_extent_ram_bytes(leaf, fi);
+
extent_end = key.offset + btrfs_file_extent_num_bytes(leaf, fi);
- if (extent_end < offset + len) {
+ if (extent_end < offset + *len) {
/* extent doesn't include our full range, must cow */
goto out;
}
*/
disk_bytenr += backref_offset;
disk_bytenr += offset - key.offset;
- num_bytes = min(offset + len, extent_end) - offset;
+ num_bytes = min(offset + *len, extent_end) - offset;
if (csum_exist_in_range(root, disk_bytenr, num_bytes))
goto out;
/*
* all of the above have passed, it is safe to overwrite this extent
* without cow
*/
+ *len = num_bytes;
ret = 1;
out:
btrfs_free_path(path);
em->block_start != EXTENT_MAP_HOLE)) {
int type;
int ret;
- u64 block_start;
+ u64 block_start, orig_start, orig_block_len, ram_bytes;
if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags))
type = BTRFS_ORDERED_PREALLOC;
if (IS_ERR(trans))
goto must_cow;
- if (can_nocow_odirect(trans, inode, start, len) == 1) {
- u64 orig_start = em->orig_start;
- u64 orig_block_len = em->orig_block_len;
- u64 ram_bytes = em->ram_bytes;
-
+ if (can_nocow_odirect(trans, inode, start, &len, &orig_start,
+ &orig_block_len, &ram_bytes) == 1) {
if (type == BTRFS_ORDERED_PREALLOC) {
free_extent_map(em);
em = create_pinned_em(inode, start, len,
/* IO errors */
int errors;
+ /* orig_bio is our btrfs_io_bio */
struct bio *orig_bio;
+
+ /* dio_bio came from fs/direct-io.c */
+ struct bio *dio_bio;
};
static void btrfs_endio_direct_read(struct bio *bio, int err)
struct bio_vec *bvec = bio->bi_io_vec;
struct inode *inode = dip->inode;
struct btrfs_root *root = BTRFS_I(inode)->root;
+ struct bio *dio_bio;
u64 start;
start = dip->logical_offset;
unlock_extent(&BTRFS_I(inode)->io_tree, dip->logical_offset,
dip->logical_offset + dip->bytes - 1);
- bio->bi_private = dip->private;
+ dio_bio = dip->dio_bio;
kfree(dip);
/* If we had a csum failure make sure to clear the uptodate flag */
if (err)
- clear_bit(BIO_UPTODATE, &bio->bi_flags);
- dio_end_io(bio, err);
+ clear_bit(BIO_UPTODATE, &dio_bio->bi_flags);
+ dio_end_io(dio_bio, err);
+ bio_put(bio);
}
static void btrfs_endio_direct_write(struct bio *bio, int err)
struct btrfs_ordered_extent *ordered = NULL;
u64 ordered_offset = dip->logical_offset;
u64 ordered_bytes = dip->bytes;
+ struct bio *dio_bio;
int ret;
if (err)
goto again;
}
out_done:
- bio->bi_private = dip->private;
+ dio_bio = dip->dio_bio;
kfree(dip);
/* If we had an error make sure to clear the uptodate flag */
if (err)
- clear_bit(BIO_UPTODATE, &bio->bi_flags);
- dio_end_io(bio, err);
+ clear_bit(BIO_UPTODATE, &dio_bio->bi_flags);
+ dio_end_io(dio_bio, err);
+ bio_put(bio);
}
static int __btrfs_submit_bio_start_direct_io(struct inode *inode, int rw,
if (!atomic_dec_and_test(&dip->pending_bios))
goto out;
- if (dip->errors)
+ if (dip->errors) {
bio_io_error(dip->orig_bio);
- else {
- set_bit(BIO_UPTODATE, &dip->orig_bio->bi_flags);
+ } else {
+ set_bit(BIO_UPTODATE, &dip->dio_bio->bi_flags);
bio_endio(dip->orig_bio, 0);
}
out:
return 0;
}
-static void btrfs_submit_direct(int rw, struct bio *bio, struct inode *inode,
- loff_t file_offset)
+static void btrfs_submit_direct(int rw, struct bio *dio_bio,
+ struct inode *inode, loff_t file_offset)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_dio_private *dip;
- struct bio_vec *bvec = bio->bi_io_vec;
+ struct bio_vec *bvec = dio_bio->bi_io_vec;
+ struct bio *io_bio;
int skip_sum;
int write = rw & REQ_WRITE;
int ret = 0;
skip_sum = BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM;
+ io_bio = btrfs_bio_clone(dio_bio, GFP_NOFS);
+
+ if (!io_bio) {
+ ret = -ENOMEM;
+ goto free_ordered;
+ }
+
dip = kmalloc(sizeof(*dip), GFP_NOFS);
if (!dip) {
ret = -ENOMEM;
- goto free_ordered;
+ goto free_io_bio;
}
- dip->private = bio->bi_private;
+ dip->private = dio_bio->bi_private;
+ io_bio->bi_private = dio_bio->bi_private;
dip->inode = inode;
dip->logical_offset = file_offset;
do {
dip->bytes += bvec->bv_len;
bvec++;
- } while (bvec <= (bio->bi_io_vec + bio->bi_vcnt - 1));
+ } while (bvec <= (dio_bio->bi_io_vec + dio_bio->bi_vcnt - 1));
- dip->disk_bytenr = (u64)bio->bi_sector << 9;
- bio->bi_private = dip;
+ dip->disk_bytenr = (u64)dio_bio->bi_sector << 9;
+ io_bio->bi_private = dip;
dip->errors = 0;
- dip->orig_bio = bio;
+ dip->orig_bio = io_bio;
+ dip->dio_bio = dio_bio;
atomic_set(&dip->pending_bios, 0);
if (write)
- bio->bi_end_io = btrfs_endio_direct_write;
+ io_bio->bi_end_io = btrfs_endio_direct_write;
else
- bio->bi_end_io = btrfs_endio_direct_read;
+ io_bio->bi_end_io = btrfs_endio_direct_read;
ret = btrfs_submit_direct_hook(rw, dip, skip_sum);
if (!ret)
return;
+
+free_io_bio:
+ bio_put(io_bio);
+
free_ordered:
/*
* If this is a write, we need to clean up the reserved space and kill
btrfs_put_ordered_extent(ordered);
btrfs_put_ordered_extent(ordered);
}
- bio_endio(bio, ret);
+ bio_endio(dio_bio, ret);
}
static ssize_t check_direct_IO(struct btrfs_root *root, int rw, struct kiocb *iocb,
return extent_write_full_page(tree, page, btrfs_get_extent, wbc);
}
-int btrfs_writepages(struct address_space *mapping,
- struct writeback_control *wbc)
+static int btrfs_writepages(struct address_space *mapping,
+ struct writeback_control *wbc)
{
struct extent_io_tree *tree;
*/
smp_mb();
if (!list_empty(&BTRFS_I(inode)->ordered_operations)) {
- spin_lock(&root->fs_info->ordered_extent_lock);
+ spin_lock(&root->fs_info->ordered_root_lock);
list_del_init(&BTRFS_I(inode)->ordered_operations);
- spin_unlock(&root->fs_info->ordered_extent_lock);
+ spin_unlock(&root->fs_info->ordered_root_lock);
}
if (test_bit(BTRFS_INODE_HAS_ORPHAN_ITEM,
inode_tree_del(inode);
btrfs_drop_extent_cache(inode, 0, (u64)-1, 0);
free:
- btrfs_remove_delayed_node(inode);
call_rcu(&inode->i_rcu, btrfs_i_callback);
}
{
struct btrfs_root *root = BTRFS_I(inode)->root;
+ if (root == NULL)
+ return 1;
+
/* the snap/subvol tree is on deleting */
if (btrfs_root_refs(&root->root_item) == 0 &&
root != root->fs_info->tree_root)
* some fairly slow code that needs optimization. This walks the list
* of all the inodes with pending delalloc and forces them to disk.
*/
-int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput)
+static int __start_delalloc_inodes(struct btrfs_root *root, int delay_iput)
{
struct btrfs_inode *binode;
struct inode *inode;
struct list_head splice;
int ret = 0;
- if (root->fs_info->sb->s_flags & MS_RDONLY)
- return -EROFS;
-
INIT_LIST_HEAD(&works);
INIT_LIST_HEAD(&splice);
- spin_lock(&root->fs_info->delalloc_lock);
- list_splice_init(&root->fs_info->delalloc_inodes, &splice);
+ spin_lock(&root->delalloc_lock);
+ list_splice_init(&root->delalloc_inodes, &splice);
while (!list_empty(&splice)) {
binode = list_entry(splice.next, struct btrfs_inode,
delalloc_inodes);
- list_del_init(&binode->delalloc_inodes);
-
+ list_move_tail(&binode->delalloc_inodes,
+ &root->delalloc_inodes);
inode = igrab(&binode->vfs_inode);
if (!inode) {
- clear_bit(BTRFS_INODE_IN_DELALLOC_LIST,
- &binode->runtime_flags);
+ cond_resched_lock(&root->delalloc_lock);
continue;
}
-
- list_add_tail(&binode->delalloc_inodes,
- &root->fs_info->delalloc_inodes);
- spin_unlock(&root->fs_info->delalloc_lock);
+ spin_unlock(&root->delalloc_lock);
work = btrfs_alloc_delalloc_work(inode, 0, delay_iput);
if (unlikely(!work)) {
&work->work);
cond_resched();
- spin_lock(&root->fs_info->delalloc_lock);
+ spin_lock(&root->delalloc_lock);
}
- spin_unlock(&root->fs_info->delalloc_lock);
+ spin_unlock(&root->delalloc_lock);
list_for_each_entry_safe(work, next, &works, list) {
list_del_init(&work->list);
btrfs_wait_and_free_delalloc_work(work);
}
+ return 0;
+out:
+ list_for_each_entry_safe(work, next, &works, list) {
+ list_del_init(&work->list);
+ btrfs_wait_and_free_delalloc_work(work);
+ }
+
+ if (!list_empty_careful(&splice)) {
+ spin_lock(&root->delalloc_lock);
+ list_splice_tail(&splice, &root->delalloc_inodes);
+ spin_unlock(&root->delalloc_lock);
+ }
+ return ret;
+}
- /* the filemap_flush will queue IO into the worker threads, but
+int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput)
+{
+ int ret;
+
+ if (root->fs_info->sb->s_flags & MS_RDONLY)
+ return -EROFS;
+
+ ret = __start_delalloc_inodes(root, delay_iput);
+ /*
+ * the filemap_flush will queue IO into the worker threads, but
* we have to make sure the IO is actually started and that
* ordered extents get created before we return
*/
atomic_read(&root->fs_info->async_delalloc_pages) == 0));
}
atomic_dec(&root->fs_info->async_submit_draining);
- return 0;
-out:
- list_for_each_entry_safe(work, next, &works, list) {
- list_del_init(&work->list);
- btrfs_wait_and_free_delalloc_work(work);
+ return ret;
+}
+
+int btrfs_start_all_delalloc_inodes(struct btrfs_fs_info *fs_info,
+ int delay_iput)
+{
+ struct btrfs_root *root;
+ struct list_head splice;
+ int ret;
+
+ if (fs_info->sb->s_flags & MS_RDONLY)
+ return -EROFS;
+
+ INIT_LIST_HEAD(&splice);
+
+ spin_lock(&fs_info->delalloc_root_lock);
+ list_splice_init(&fs_info->delalloc_roots, &splice);
+ while (!list_empty(&splice)) {
+ root = list_first_entry(&splice, struct btrfs_root,
+ delalloc_root);
+ root = btrfs_grab_fs_root(root);
+ BUG_ON(!root);
+ list_move_tail(&root->delalloc_root,
+ &fs_info->delalloc_roots);
+ spin_unlock(&fs_info->delalloc_root_lock);
+
+ ret = __start_delalloc_inodes(root, delay_iput);
+ btrfs_put_fs_root(root);
+ if (ret)
+ goto out;
+
+ spin_lock(&fs_info->delalloc_root_lock);
}
+ spin_unlock(&fs_info->delalloc_root_lock);
+ atomic_inc(&fs_info->async_submit_draining);
+ while (atomic_read(&fs_info->nr_async_submits) ||
+ atomic_read(&fs_info->async_delalloc_pages)) {
+ wait_event(fs_info->async_submit_wait,
+ (atomic_read(&fs_info->nr_async_submits) == 0 &&
+ atomic_read(&fs_info->async_delalloc_pages) == 0));
+ }
+ atomic_dec(&fs_info->async_submit_draining);
+ return 0;
+out:
if (!list_empty_careful(&splice)) {
- spin_lock(&root->fs_info->delalloc_lock);
- list_splice_tail(&splice, &root->fs_info->delalloc_inodes);
- spin_unlock(&root->fs_info->delalloc_lock);
+ spin_lock(&fs_info->delalloc_root_lock);
+ list_splice_tail(&splice, &fs_info->delalloc_roots);
+ spin_unlock(&fs_info->delalloc_root_lock);
}
return ret;
}
projects / mirror_ubuntu-bionic-kernel.git / blobdiff