From a791e35e12ff672e8a0e140abeeaf900c3b2ea77 Mon Sep 17 00:00:00 2001 From: Chris Mason Date: Thu, 8 Oct 2009 11:27:10 -0400 Subject: [PATCH] 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 --- fs/btrfs/extent_io.c | 27 +++++++++++---------------- fs/btrfs/extent_io.h | 16 ++++++++++------ fs/btrfs/inode.c | 45 ++++++++++++++++++++++++++++++--------------- 3 files changed, 51 insertions(+), 37 deletions(-) diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index de1793b..f9708bd 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -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]); } diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 4794ec8..41d2a47 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -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 diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 3a6f953..a7058fc 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -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; -- 1.8.2.3