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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable

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* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
  Btrfs: fix data space leak fix
  Btrfs: remove duplicates of filemap_ helpers
  Btrfs: take i_mutex before generic_write_checks
  Btrfs: fix arguments to btrfs_wait_on_page_writeback_range
  Btrfs: fix deadlock with free space handling and user transactions
  Btrfs: fix error cases for ioctl transactions
  Btrfs: Use CONFIG_BTRFS_POSIX_ACL to enable ACL code
  Btrfs: introduce missing kfree
  Btrfs: Fix setting umask when POSIX ACLs are not enabled
  Btrfs: proper -ENOSPC handling
This commit is contained in:
Linus Torvalds
2009-10-01 20:23:15 -07:00
parent e6a0a8bfef 9c2693c924
commit 0efe5e32c8
16 changed files with 749 additions and 249 deletions
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235
fs/btrfs/inode.c
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@@ -1159,6 +1159,83 @@ static int run_delalloc_range(struct inode *inode, struct page *locked_page,
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 delalloc_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;
}
BTRFS_I(inode)->delalloc_extents++;
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) {
BTRFS_I(inode)->delalloc_extents--;
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;
BTRFS_I(inode)->delalloc_extents--;
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
@@ -1167,6 +1244,7 @@ static int run_delalloc_range(struct inode *inode, struct page *locked_page,
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
@@ -1174,6 +1252,8 @@ static int btrfs_set_bit_hook(struct inode *inode, u64 start, u64 end,
*/
if (!(old & EXTENT_DELALLOC) && (bits & EXTENT_DELALLOC)) {
struct btrfs_root *root = BTRFS_I(inode)->root;
BTRFS_I(inode)->delalloc_extents++;
btrfs_delalloc_reserve_space(root, inode, end - start + 1);
spin_lock(&root->fs_info->delalloc_lock);
BTRFS_I(inode)->delalloc_bytes += end - start + 1;
@@ -1190,22 +1270,27 @@ static int btrfs_set_bit_hook(struct inode *inode, u64 start, u64 end,
/*
* 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;
BTRFS_I(inode)->delalloc_extents--;
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);
@@ -1213,9 +1298,12 @@ static int btrfs_clear_bit_hook(struct inode *inode, u64 start, u64 end,
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)) {
@@ -2950,7 +3038,12 @@ again:
goto again;
}
btrfs_set_extent_delalloc(inode, page_start, page_end);
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);
@@ -2981,15 +3074,11 @@ int btrfs_cont_expand(struct inode *inode, loff_t size)
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);
if (err)
return err;
btrfs_truncate_page(inode->i_mapping, inode->i_size);
while (1) {
@@ -3024,12 +3113,18 @@ int btrfs_cont_expand(struct inode *inode, loff_t size)
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;
@@ -3990,11 +4085,18 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry,
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);
@@ -4032,6 +4134,7 @@ out_unlock:
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);
@@ -4052,10 +4155,18 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
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);
@@ -4096,6 +4207,7 @@ out_unlock:
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);
@@ -4118,10 +4230,16 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
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;
@@ -4145,6 +4263,7 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
nr = trans->blocks_used;
btrfs_end_transaction_throttle(trans, root);
fail:
btrfs_unreserve_metadata_space(root, 3);
if (drop_inode) {
inode_dec_link_count(inode);
iput(inode);
@@ -4164,17 +4283,21 @@ static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
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) {
@@ -4223,6 +4346,7 @@ out_fail:
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);
@@ -4747,6 +4871,13 @@ int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
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);
@@ -4778,7 +4909,23 @@ again:
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, 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 */
@@ -4801,6 +4948,7 @@ again:
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);
@@ -4917,6 +5065,8 @@ struct inode *btrfs_alloc_inode(struct super_block *sb)
return NULL;
ei->last_trans = 0;
ei->logged_trans = 0;
ei->delalloc_extents = 0;
ei->delalloc_reserved_extents = 0;
btrfs_ordered_inode_tree_init(&ei->ordered_tree);
INIT_LIST_HEAD(&ei->i_orphan);
INIT_LIST_HEAD(&ei->ordered_operations);
@@ -5070,7 +5220,12 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry,
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;
@@ -5185,6 +5340,8 @@ out_fail:
if (old_inode->i_ino == BTRFS_FIRST_FREE_OBJECTID)
up_read(&root->fs_info->subvol_sem);
btrfs_unreserve_metadata_space(root, 4);
return ret;
}
@@ -5256,11 +5413,18 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
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);
@@ -5341,6 +5505,7 @@ out_unlock:
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);
@@ -5362,6 +5527,11 @@ static int prealloc_file_range(struct btrfs_trans_handle *trans,
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);
@@ -5381,6 +5551,7 @@ static int prealloc_file_range(struct btrfs_trans_handle *trans,
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) {
@@ -5566,6 +5737,8 @@ static struct extent_io_ops btrfs_extent_io_ops = {
.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,
};
/*