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Fixes for loopback files in btrfs 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2007-12-14 12:56:58 -05:00
parent 6e3b96668e
commit e9906a9849
2 changed files with 14 additions and 2 deletions
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1
fs/btrfs/file.c
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@ -861,6 +861,7 @@ struct file_operations btrfs_file_operations = {
.llseek = generic_file_llseek,
.read = do_sync_read,
.aio_read = generic_file_aio_read,
.splice_read = generic_file_splice_read,
.write = btrfs_file_write,
.mmap = btrfs_file_mmap,
.open = generic_file_open,

15
fs/btrfs/inode.c
View File

@ -1893,8 +1893,19 @@ static void btrfs_truncate(struct inode *inode)
int btrfs_commit_write(struct file *file, struct page *page,
unsigned from, unsigned to)
{
return extent_commit_write(&BTRFS_I(page->mapping->host)->extent_tree,
page->mapping->host, page, from, to);
loff_t pos = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;
struct inode *inode = page->mapping->host;
btrfs_cow_one_page(inode, page, PAGE_CACHE_SIZE);
set_page_extent_mapped(page);
set_page_dirty(page);
if (pos > inode->i_size) {
i_size_write(inode, pos);
mark_inode_dirty(inode);
}
return 0;
}
static int create_subvol(struct btrfs_root *root, char *name, int namelen)