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Btrfs: Maintain a list of inodes that are delalloc and a way to wait on them 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
wifi-calibration
Chris Mason 2008-08-04 23:17:27 -04:00
parent d7a029a89e
commit ea8c281947
7 changed files with 60 additions and 13 deletions
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2
fs/btrfs/btrfs_inode.h
View File

@ -42,6 +42,8 @@ struct btrfs_inode {
/* for keeping track of orphaned inodes */
struct list_head i_orphan;
struct list_head delalloc_inodes;
/*
* transid of the trans_handle that last modified this inode
*/

4
fs/btrfs/ctree.h
View File

@ -551,6 +551,7 @@ struct btrfs_fs_info {
*/
spinlock_t ordered_extent_lock;
struct list_head ordered_extents;
struct list_head delalloc_inodes;
/*
* there is a pool of worker threads for checksumming during writes
@ -637,6 +638,7 @@ struct btrfs_root {
struct kobject root_kobj;
struct completion kobj_unregister;
struct mutex objectid_mutex;
u64 objectid;
u64 last_trans;
@ -1651,6 +1653,8 @@ int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
#define PageChecked PageFsMisc
#endif
int btrfs_start_delalloc_inodes(struct btrfs_root *root);
int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
int btrfs_writepages(struct address_space *mapping,
struct writeback_control *wbc);
int btrfs_create_subvol_root(struct btrfs_root *new_root,

1
fs/btrfs/disk-io.c
View File

@ -1234,6 +1234,7 @@ struct btrfs_root *open_ctree(struct super_block *sb,
INIT_LIST_HEAD(&fs_info->trans_list);
INIT_LIST_HEAD(&fs_info->dead_roots);
INIT_LIST_HEAD(&fs_info->hashers);
INIT_LIST_HEAD(&fs_info->delalloc_inodes);
spin_lock_init(&fs_info->hash_lock);
spin_lock_init(&fs_info->delalloc_lock);
spin_lock_init(&fs_info->new_trans_lock);

12
fs/btrfs/extent-tree.c
View File

@ -1230,7 +1230,6 @@ static int update_space_info(struct btrfs_fs_info *info, u64 flags,
found->total_bytes += total_bytes;
found->bytes_used += bytes_used;
found->full = 0;
WARN_ON(found->total_bytes < found->bytes_used);
*space_info = found;
return 0;
}
@ -2841,8 +2840,7 @@ again:
*/
clear_page_dirty_for_io(page);
set_extent_delalloc(io_tree, page_start,
page_end, GFP_NOFS);
btrfs_set_extent_delalloc(inode, page_start, page_end);
set_page_dirty(page);
unlock_extent(io_tree, page_start, page_end, GFP_NOFS);
@ -3319,6 +3317,13 @@ again:
key.type = 0;
cur_byte = key.objectid;
mutex_unlock(&root->fs_info->alloc_mutex);
btrfs_start_delalloc_inodes(root);
btrfs_wait_ordered_extents(tree_root);
mutex_lock(&root->fs_info->alloc_mutex);
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0)
goto out;
@ -3401,6 +3406,7 @@ next:
btrfs_clean_old_snapshots(tree_root);
btrfs_start_delalloc_inodes(root);
btrfs_wait_ordered_extents(tree_root);
trans = btrfs_start_transaction(tree_root, 1);

3
fs/btrfs/file.c
View File

@ -312,8 +312,7 @@ static int noinline dirty_and_release_pages(struct btrfs_trans_handle *trans,
* to reset the delalloc bit on things that already have
* extents reserved.
*/
set_extent_delalloc(io_tree, start_pos,
end_of_last_block, GFP_NOFS);
btrfs_set_extent_delalloc(inode, start_pos, end_of_last_block);
for (i = 0; i < num_pages; i++) {
struct page *p = pages[i];
SetPageUptodate(p);

47
fs/btrfs/inode.c
View File

@ -303,6 +303,10 @@ int btrfs_set_bit_hook(struct inode *inode, u64 start, u64 end,
spin_lock_irqsave(&root->fs_info->delalloc_lock, flags);
BTRFS_I(inode)->delalloc_bytes += end - start + 1;
root->fs_info->delalloc_bytes += end - start + 1;
if (list_empty(&BTRFS_I(inode)->delalloc_inodes)) {
list_add_tail(&BTRFS_I(inode)->delalloc_inodes,
&root->fs_info->delalloc_inodes);
}
spin_unlock_irqrestore(&root->fs_info->delalloc_lock, flags);
}
return 0;
@ -325,6 +329,10 @@ int btrfs_clear_bit_hook(struct inode *inode, u64 start, u64 end,
root->fs_info->delalloc_bytes -= end - start + 1;
BTRFS_I(inode)->delalloc_bytes -= end - start + 1;
}
if (BTRFS_I(inode)->delalloc_bytes == 0 &&
!list_empty(&BTRFS_I(inode)->delalloc_inodes)) {
list_del_init(&BTRFS_I(inode)->delalloc_inodes);
}
spin_unlock_irqrestore(&root->fs_info->delalloc_lock, flags);
}
return 0;
@ -408,6 +416,12 @@ static noinline int add_pending_csums(struct btrfs_trans_handle *trans,
return 0;
}
int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end)
{
return set_extent_delalloc(&BTRFS_I(inode)->io_tree, start, end,
GFP_NOFS);
}
struct btrfs_writepage_fixup {
struct page *page;
struct btrfs_work work;
@ -453,8 +467,7 @@ again:
goto again;
}
set_extent_delalloc(&BTRFS_I(inode)->io_tree, page_start, page_end,
GFP_NOFS);
btrfs_set_extent_delalloc(inode, page_start, page_end);
ClearPageChecked(page);
out:
unlock_extent(&BTRFS_I(inode)->io_tree, page_start, page_end, GFP_NOFS);
@ -1530,8 +1543,7 @@ again:
goto again;
}
set_extent_delalloc(&BTRFS_I(inode)->io_tree, page_start,
page_end, GFP_NOFS);
btrfs_set_extent_delalloc(inode, page_start, page_end);
ret = 0;
if (offset != PAGE_CACHE_SIZE) {
kaddr = kmap(page);
@ -1766,6 +1778,7 @@ static int btrfs_init_locked_inode(struct inode *inode, void *p)
inode->i_mapping, GFP_NOFS);
extent_io_tree_init(&BTRFS_I(inode)->io_failure_tree,
inode->i_mapping, GFP_NOFS);
INIT_LIST_HEAD(&BTRFS_I(inode)->delalloc_inodes);
btrfs_ordered_inode_tree_init(&BTRFS_I(inode)->ordered_tree);
mutex_init(&BTRFS_I(inode)->csum_mutex);
mutex_init(&BTRFS_I(inode)->extent_mutex);
@ -2158,6 +2171,7 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
extent_io_tree_init(&BTRFS_I(inode)->io_failure_tree,
inode->i_mapping, GFP_NOFS);
btrfs_ordered_inode_tree_init(&BTRFS_I(inode)->ordered_tree);
INIT_LIST_HEAD(&BTRFS_I(inode)->delalloc_inodes);
mutex_init(&BTRFS_I(inode)->csum_mutex);
mutex_init(&BTRFS_I(inode)->extent_mutex);
BTRFS_I(inode)->delalloc_bytes = 0;
@ -2400,6 +2414,7 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
inode->i_mapping, GFP_NOFS);
extent_io_tree_init(&BTRFS_I(inode)->io_failure_tree,
inode->i_mapping, GFP_NOFS);
INIT_LIST_HEAD(&BTRFS_I(inode)->delalloc_inodes);
mutex_init(&BTRFS_I(inode)->csum_mutex);
mutex_init(&BTRFS_I(inode)->extent_mutex);
BTRFS_I(inode)->delalloc_bytes = 0;
@ -3049,8 +3064,7 @@ again:
goto again;
}
set_extent_delalloc(&BTRFS_I(inode)->io_tree, page_start,
page_end, GFP_NOFS);
btrfs_set_extent_delalloc(inode, page_start, page_end);
ret = 0;
/* page is wholly or partially inside EOF */
@ -3373,6 +3387,26 @@ out_unlock:
return ret;
}
int btrfs_start_delalloc_inodes(struct btrfs_root *root)
{
struct list_head *head = &root->fs_info->delalloc_inodes;
struct btrfs_inode *binode;
unsigned long flags;
spin_lock_irqsave(&root->fs_info->delalloc_lock, flags);
while(!list_empty(head)) {
binode = list_entry(head->next, struct btrfs_inode,
delalloc_inodes);
atomic_inc(&binode->vfs_inode.i_count);
spin_unlock_irqrestore(&root->fs_info->delalloc_lock, flags);
filemap_write_and_wait(binode->vfs_inode.i_mapping);
iput(&binode->vfs_inode);
spin_lock_irqsave(&root->fs_info->delalloc_lock, flags);
}
spin_unlock_irqrestore(&root->fs_info->delalloc_lock, flags);
return 0;
}
static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
const char *symname)
{
@ -3436,6 +3470,7 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
inode->i_mapping, GFP_NOFS);
extent_io_tree_init(&BTRFS_I(inode)->io_failure_tree,
inode->i_mapping, GFP_NOFS);
INIT_LIST_HEAD(&BTRFS_I(inode)->delalloc_inodes);
mutex_init(&BTRFS_I(inode)->csum_mutex);
mutex_init(&BTRFS_I(inode)->extent_mutex);
BTRFS_I(inode)->delalloc_bytes = 0;

4
fs/btrfs/ioctl.c
View File

@ -274,8 +274,7 @@ again:
*/
clear_page_dirty_for_io(page);
set_extent_delalloc(io_tree, page_start,
page_end, GFP_NOFS);
btrfs_set_extent_delalloc(inode, page_start, page_end);
unlock_extent(io_tree, page_start, page_end, GFP_NOFS);
set_page_dirty(page);
@ -784,6 +783,7 @@ long btrfs_ioctl(struct file *file, unsigned int
case BTRFS_IOC_TRANS_END:
return btrfs_ioctl_trans_end(file);
case BTRFS_IOC_SYNC:
btrfs_start_delalloc_inodes(root);
btrfs_sync_fs(file->f_dentry->d_sb, 1);
return 0;
}