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Btrfs: cleanup extent_clear_unlock_delalloc flags 

extent_clear_unlock_delalloc has a growing set of ugly parameters
that is very difficult to read and maintain.

This switches to a flag field and well named flag defines.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2009-10-08 11:27:10 -04:00
parent 1cdda9b81a
commit a791e35e12
3 changed files with 51 additions and 37 deletions
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27
fs/btrfs/extent_io.c
View File

@ -1401,12 +1401,7 @@ out_failed:
int extent_clear_unlock_delalloc(struct inode *inode,
struct extent_io_tree *tree,
u64 start, u64 end, struct page *locked_page,
int unlock_pages,
int clear_unlock,
int clear_delalloc, int clear_dirty,
int set_writeback,
int end_writeback,
int set_private2)
unsigned long op)
{
int ret;
struct page *pages[16];
@ -1416,17 +1411,17 @@ int extent_clear_unlock_delalloc(struct inode *inode,
int i;
int clear_bits = 0;
if (clear_unlock)
if (op & EXTENT_CLEAR_UNLOCK)
clear_bits |= EXTENT_LOCKED;
if (clear_dirty)
if (op & EXTENT_CLEAR_DIRTY)
clear_bits |= EXTENT_DIRTY;
if (clear_delalloc)
if (op & EXTENT_CLEAR_DELALLOC)
clear_bits |= EXTENT_DELALLOC;
clear_extent_bit(tree, start, end, clear_bits, 1, 0, NULL, GFP_NOFS);
if (!(unlock_pages || clear_dirty || set_writeback || end_writeback ||
set_private2))
if (!(op & (EXTENT_CLEAR_UNLOCK_PAGE | EXTENT_CLEAR_DIRTY | EXTENT_SET_WRITEBACK |
EXTENT_END_WRITEBACK | EXTENT_SET_PRIVATE2)))
return 0;
while (nr_pages > 0) {
@ -1435,20 +1430,20 @@ int extent_clear_unlock_delalloc(struct inode *inode,
nr_pages, ARRAY_SIZE(pages)), pages);
for (i = 0; i < ret; i++) {
if (set_private2)
if (op & EXTENT_SET_PRIVATE2)
SetPagePrivate2(pages[i]);
if (pages[i] == locked_page) {
page_cache_release(pages[i]);
continue;
}
if (clear_dirty)
if (op & EXTENT_CLEAR_DIRTY)
clear_page_dirty_for_io(pages[i]);
if (set_writeback)
if (op & EXTENT_SET_WRITEBACK)
set_page_writeback(pages[i]);
if (end_writeback)
if (op & EXTENT_END_WRITEBACK)
end_page_writeback(pages[i]);
if (unlock_pages)
if (op & EXTENT_CLEAR_UNLOCK_PAGE)
unlock_page(pages[i]);
page_cache_release(pages[i]);
}

16
fs/btrfs/extent_io.h
View File

@ -25,6 +25,15 @@
#define EXTENT_BUFFER_BLOCKING 1
#define EXTENT_BUFFER_DIRTY 2
/* these are flags for extent_clear_unlock_delalloc */
#define EXTENT_CLEAR_UNLOCK_PAGE 0x1
#define EXTENT_CLEAR_UNLOCK 0x2
#define EXTENT_CLEAR_DELALLOC 0x4
#define EXTENT_CLEAR_DIRTY 0x8
#define EXTENT_SET_WRITEBACK 0x10
#define EXTENT_END_WRITEBACK 0x20
#define EXTENT_SET_PRIVATE2 0x40
/*
* page->private values. Every page that is controlled by the extent
* map has page->private set to one.
@ -288,10 +297,5 @@ int extent_range_uptodate(struct extent_io_tree *tree,
int extent_clear_unlock_delalloc(struct inode *inode,
struct extent_io_tree *tree,
u64 start, u64 end, struct page *locked_page,
int unlock_page,
int clear_unlock,
int clear_delalloc, int clear_dirty,
int set_writeback,
int end_writeback,
int set_private2);
unsigned long op);
#endif

45
fs/btrfs/inode.c
View File

@ -424,9 +424,10 @@ again:
* and free up our temp pages.
*/
extent_clear_unlock_delalloc(inode,
&BTRFS_I(inode)->io_tree,
start, end, NULL, 1, 0,
0, 1, 1, 1, 0);
&BTRFS_I(inode)->io_tree,
start, end, NULL,
EXTENT_CLEAR_UNLOCK_PAGE | EXTENT_CLEAR_DIRTY |
EXTENT_SET_WRITEBACK | EXTENT_END_WRITEBACK);
ret = 0;
goto free_pages_out;
}
@ -637,11 +638,13 @@ static noinline int submit_compressed_extents(struct inode *inode,
* clear dirty, set writeback and unlock the pages.
*/
extent_clear_unlock_delalloc(inode,
&BTRFS_I(inode)->io_tree,
async_extent->start,
async_extent->start +
async_extent->ram_size - 1,
NULL, 1, 1, 0, 1, 1, 0, 0);
&BTRFS_I(inode)->io_tree,
async_extent->start,
async_extent->start +
async_extent->ram_size - 1,
NULL, EXTENT_CLEAR_UNLOCK_PAGE |
EXTENT_CLEAR_UNLOCK |
EXTENT_CLEAR_DIRTY | EXTENT_SET_WRITEBACK);
ret = btrfs_submit_compressed_write(inode,
async_extent->start,
@ -712,9 +715,14 @@ static noinline int cow_file_range(struct inode *inode,
start, end, 0, NULL);
if (ret == 0) {
extent_clear_unlock_delalloc(inode,
&BTRFS_I(inode)->io_tree,
start, end, NULL, 1, 1,
1, 1, 1, 1, 0);
&BTRFS_I(inode)->io_tree,
start, end, NULL,
EXTENT_CLEAR_UNLOCK_PAGE |
EXTENT_CLEAR_UNLOCK |
EXTENT_CLEAR_DELALLOC |
EXTENT_CLEAR_DIRTY |
EXTENT_SET_WRITEBACK |
EXTENT_END_WRITEBACK);
*nr_written = *nr_written +
(end - start + PAGE_CACHE_SIZE) / PAGE_CACHE_SIZE;
*page_started = 1;
@ -738,6 +746,8 @@ static noinline int cow_file_range(struct inode *inode,
btrfs_drop_extent_cache(inode, start, start + num_bytes - 1, 0);
while (disk_num_bytes > 0) {
unsigned long op;
cur_alloc_size = min(disk_num_bytes, root->fs_info->max_extent);
ret = btrfs_reserve_extent(trans, root, cur_alloc_size,
root->sectorsize, 0, alloc_hint,
@ -789,10 +799,13 @@ static noinline int cow_file_range(struct inode *inode,
* Do set the Private2 bit so we know this page was properly
* setup for writepage
*/
op = unlock ? EXTENT_CLEAR_UNLOCK_PAGE : 0;
op |= EXTENT_CLEAR_UNLOCK | EXTENT_CLEAR_DELALLOC |
EXTENT_SET_PRIVATE2;
extent_clear_unlock_delalloc(inode, &BTRFS_I(inode)->io_tree,
start, start + ram_size - 1,
locked_page, unlock, 1,
1, 0, 0, 0, 1);
locked_page, op);
disk_num_bytes -= cur_alloc_size;
num_bytes -= cur_alloc_size;
alloc_hint = ins.objectid + ins.offset;
@ -1112,8 +1125,10 @@ out_check:
BUG_ON(ret);
extent_clear_unlock_delalloc(inode, &BTRFS_I(inode)->io_tree,
cur_offset, cur_offset + num_bytes - 1,
locked_page, 1, 1, 1, 0, 0, 0, 1);
cur_offset, cur_offset + num_bytes - 1,
locked_page, EXTENT_CLEAR_UNLOCK_PAGE |
EXTENT_CLEAR_UNLOCK | EXTENT_CLEAR_DELALLOC |
EXTENT_SET_PRIVATE2);
cur_offset = extent_end;
if (cur_offset > end)
break;