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From: Qu Wenruo <wqu@suse.com>
To: linux-btrfs@vger.kernel.org
Subject: [PATCH 04/17] btrfs: make btrfs_fs_info::buffer_radix to take sector size devided values
Date: Tue,  8 Sep 2020 15:52:17 +0800	[thread overview]
Message-ID: <20200908075230.86856-5-wqu@suse.com> (raw)
In-Reply-To: <20200908075230.86856-1-wqu@suse.com>

For subpage size sector size support, one page can contain mutliple tree
blocks, thus we can no longer use (eb->start >> PAGE_SHIFT) any more, or
we can easily get extent buffer doesn't belongs to us.

This patch will use (extent_buffer::start / sectorsize) as index for radix
tree so that we can get correct extent buffer for subpage size support.

Signed-off-by: Qu Wenruo <wqu@suse.com>
---
 fs/btrfs/extent_io.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 6def411b2eba..5d969340275e 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -5142,7 +5142,7 @@ struct extent_buffer *find_extent_buffer(struct btrfs_fs_info *fs_info,
 
 	rcu_read_lock();
 	eb = radix_tree_lookup(&fs_info->buffer_radix,
-			       start >> PAGE_SHIFT);
+			       start / fs_info->sectorsize);
 	if (eb && atomic_inc_not_zero(&eb->refs)) {
 		rcu_read_unlock();
 		/*
@@ -5194,7 +5194,7 @@ struct extent_buffer *alloc_test_extent_buffer(struct btrfs_fs_info *fs_info,
 	}
 	spin_lock(&fs_info->buffer_lock);
 	ret = radix_tree_insert(&fs_info->buffer_radix,
-				start >> PAGE_SHIFT, eb);
+				start / fs_info->sectorsize, eb);
 	spin_unlock(&fs_info->buffer_lock);
 	radix_tree_preload_end();
 	if (ret == -EEXIST) {
@@ -5302,7 +5302,7 @@ struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info,
 
 	spin_lock(&fs_info->buffer_lock);
 	ret = radix_tree_insert(&fs_info->buffer_radix,
-				start >> PAGE_SHIFT, eb);
+				start / fs_info->sectorsize, eb);
 	spin_unlock(&fs_info->buffer_lock);
 	radix_tree_preload_end();
 	if (ret == -EEXIST) {
@@ -5358,7 +5358,7 @@ static int release_extent_buffer(struct extent_buffer *eb)
 
 			spin_lock(&fs_info->buffer_lock);
 			radix_tree_delete(&fs_info->buffer_radix,
-					  eb->start >> PAGE_SHIFT);
+					  eb->start / fs_info->sectorsize);
 			spin_unlock(&fs_info->buffer_lock);
 		} else {
 			spin_unlock(&eb->refs_lock);
-- 
2.28.0


  parent reply	other threads:[~2020-09-08  7:52 UTC|newest]

Thread overview: 49+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-08  7:52 [PATCH 00/17] btrfs: add read-only support for subpage sector size Qu Wenruo
2020-09-08  7:52 ` [PATCH 01/17] btrfs: extent-io-tests: remove invalid tests Qu Wenruo
2020-09-09 12:26   ` Nikolay Borisov
2020-09-09 13:06     ` Qu Wenruo
2020-09-08  7:52 ` [PATCH 02/17] btrfs: calculate inline extent buffer page size based on page size Qu Wenruo
2020-09-11  9:56   ` Nikolay Borisov
2020-09-11 10:13     ` Qu Wenruo
2020-09-08  7:52 ` [PATCH 03/17] btrfs: remove the open-code to read disk-key Qu Wenruo
2020-09-11 10:07   ` Nikolay Borisov
2020-09-08  7:52 ` Qu Wenruo [this message]
2020-09-08 18:03   ` [PATCH 04/17] btrfs: make btrfs_fs_info::buffer_radix to take sector size devided values kernel test robot
2020-09-11 10:11   ` Nikolay Borisov
2020-09-11 10:15     ` Qu Wenruo
2020-09-08  7:52 ` [PATCH 05/17] btrfs: don't allow tree block to cross page boundary for subpage support Qu Wenruo
2020-09-11 10:26   ` Nikolay Borisov
2020-09-11 11:36     ` Qu Wenruo
2020-09-11 12:08       ` Nikolay Borisov
2020-09-08  7:52 ` [PATCH 06/17] btrfs: handle sectorsize < PAGE_SIZE case for extent buffer accessors Qu Wenruo
2020-09-08  7:52 ` [PATCH 07/17] btrfs: make csum_tree_block() handle sectorsize smaller than page size Qu Wenruo
2020-09-11 11:10   ` Nikolay Borisov
2020-09-08  7:52 ` [PATCH 08/17] btrfs: refactor how we extract extent buffer from page for alloc_extent_buffer() Qu Wenruo
2020-09-11 11:14   ` Nikolay Borisov
2020-09-08  7:52 ` [PATCH 09/17] btrfs: refactor btrfs_release_extent_buffer_pages() Qu Wenruo
2020-09-11 11:17   ` Nikolay Borisov
2020-09-11 11:39     ` Qu Wenruo
2020-09-08  7:52 ` [PATCH 10/17] btrfs: add assert_spin_locked() for attach_extent_buffer_page() Qu Wenruo
2020-09-11 11:22   ` Nikolay Borisov
2020-09-08  7:52 ` [PATCH 11/17] btrfs: extract the extent buffer verification from btree_readpage_end_io_hook() Qu Wenruo
2020-09-11 13:00   ` Nikolay Borisov
2020-09-08  7:52 ` [PATCH 12/17] btrfs: remove the unnecessary parameter @start and @len for check_data_csum() Qu Wenruo
2020-09-11 13:50   ` Nikolay Borisov
2020-09-08  7:52 ` [PATCH 13/17] btrfs: extent_io: only require sector size alignment for page read Qu Wenruo
2020-09-11 13:55   ` Nikolay Borisov
2020-09-15  1:54     ` Qu Wenruo
2020-09-08  7:52 ` [PATCH 14/17] btrfs: make btrfs_readpage_end_io_hook() follow sector size Qu Wenruo
2020-09-09 17:34   ` Goldwyn Rodrigues
2020-09-10  0:05     ` Qu Wenruo
2020-09-10 14:26       ` Goldwyn Rodrigues
2020-09-08  7:52 ` [PATCH 15/17] btrfs: introduce subpage_eb_mapping for extent buffers Qu Wenruo
2020-09-08 10:22   ` kernel test robot
2020-09-08 10:22     ` kernel test robot
2020-09-08 12:11   ` kernel test robot
2020-09-08 14:24   ` Dan Carpenter
2020-09-08 14:24     ` Dan Carpenter
2020-09-08 14:24     ` Dan Carpenter
2020-09-08  7:52 ` [PATCH 16/17] btrfs: handle extent buffer verification proper for subpage size Qu Wenruo
2020-09-08  7:52 ` [PATCH 17/17] btrfs: allow RO mount of 4K sector size fs on 64K page system Qu Wenruo
2020-09-08  8:03 ` [PATCH 00/17] btrfs: add read-only support for subpage sector size Qu Wenruo
2020-09-11 10:24 ` Qu Wenruo

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