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

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
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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47
fs/btrfs/inode.c
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@ -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;