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-rw-r--r--fs/btrfs/compression.c10
-rw-r--r--fs/btrfs/extent_io.c45
-rw-r--r--fs/btrfs/extent_io.h3
-rw-r--r--fs/btrfs/file.c24
-rw-r--r--fs/btrfs/free-space-cache.c15
-rw-r--r--fs/btrfs/inode.c15
-rw-r--r--fs/btrfs/ioctl.c8
-rw-r--r--fs/btrfs/reflink.c5
-rw-r--r--fs/btrfs/relocation.c11
9 files changed, 103 insertions, 33 deletions
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index 5ae3fa0386b7..6d203acfdeb3 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -542,13 +542,19 @@ static noinline int add_ra_bio_pages(struct inode *inode,
goto next;
}
- end = last_offset + PAGE_SIZE - 1;
/*
* at this point, we have a locked page in the page cache
* for these bytes in the file. But, we have to make
* sure they map to this compressed extent on disk.
*/
- set_page_extent_mapped(page);
+ ret = set_page_extent_mapped(page);
+ if (ret < 0) {
+ unlock_page(page);
+ put_page(page);
+ break;
+ }
+
+ end = last_offset + PAGE_SIZE - 1;
lock_extent(tree, last_offset, end);
read_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree, last_offset,
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 491fc0114672..5ff85ecc6c3f 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3191,10 +3191,38 @@ static int attach_extent_buffer_page(struct extent_buffer *eb,
return ret;
}
-void set_page_extent_mapped(struct page *page)
+int set_page_extent_mapped(struct page *page)
{
+ struct btrfs_fs_info *fs_info;
+
+ ASSERT(page->mapping);
+
+ if (PagePrivate(page))
+ return 0;
+
+ fs_info = btrfs_sb(page->mapping->host->i_sb);
+
+ if (fs_info->sectorsize < PAGE_SIZE)
+ return btrfs_attach_subpage(fs_info, page, BTRFS_SUBPAGE_DATA);
+
+ attach_page_private(page, (void *)EXTENT_PAGE_PRIVATE);
+ return 0;
+}
+
+void clear_page_extent_mapped(struct page *page)
+{
+ struct btrfs_fs_info *fs_info;
+
+ ASSERT(page->mapping);
+
if (!PagePrivate(page))
- attach_page_private(page, (void *)EXTENT_PAGE_PRIVATE);
+ return;
+
+ fs_info = btrfs_sb(page->mapping->host->i_sb);
+ if (fs_info->sectorsize < PAGE_SIZE)
+ return btrfs_detach_subpage(fs_info, page);
+
+ detach_page_private(page);
}
static struct extent_map *
@@ -3251,7 +3279,12 @@ int btrfs_do_readpage(struct page *page, struct extent_map **em_cached,
unsigned long this_bio_flag = 0;
struct extent_io_tree *tree = &BTRFS_I(inode)->io_tree;
- set_page_extent_mapped(page);
+ ret = set_page_extent_mapped(page);
+ if (ret < 0) {
+ unlock_extent(tree, start, end);
+ SetPageError(page);
+ goto out;
+ }
if (!PageUptodate(page)) {
if (cleancache_get_page(page) == 0) {
@@ -3691,7 +3724,11 @@ static int __extent_writepage(struct page *page, struct writeback_control *wbc,
flush_dcache_page(page);
}
- set_page_extent_mapped(page);
+ ret = set_page_extent_mapped(page);
+ if (ret < 0) {
+ SetPageError(page);
+ goto done;
+ }
if (!epd->extent_locked) {
ret = writepage_delalloc(BTRFS_I(inode), page, wbc, start,
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 2d8187c84812..047b3e66897f 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -178,7 +178,8 @@ int btree_write_cache_pages(struct address_space *mapping,
void extent_readahead(struct readahead_control *rac);
int extent_fiemap(struct btrfs_inode *inode, struct fiemap_extent_info *fieinfo,
u64 start, u64 len);
-void set_page_extent_mapped(struct page *page);
+int set_page_extent_mapped(struct page *page);
+void clear_page_extent_mapped(struct page *page);
struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info,
u64 start, u64 owner_root, int level);
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index be5350f5bedf..bf52d7e85914 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1369,6 +1369,12 @@ again:
goto fail;
}
+ err = set_page_extent_mapped(pages[i]);
+ if (err < 0) {
+ faili = i;
+ goto fail;
+ }
+
if (i == 0)
err = prepare_uptodate_page(inode, pages[i], pos,
force_uptodate);
@@ -1453,23 +1459,11 @@ lock_and_cleanup_extent_if_need(struct btrfs_inode *inode, struct page **pages,
}
/*
- * It's possible the pages are dirty right now, but we don't want
- * to clean them yet because copy_from_user may catch a page fault
- * and we might have to fall back to one page at a time. If that
- * happens, we'll unlock these pages and we'd have a window where
- * reclaim could sneak in and drop the once-dirty page on the floor
- * without writing it.
- *
- * We have the pages locked and the extent range locked, so there's
- * no way someone can start IO on any dirty pages in this range.
- *
- * We'll call btrfs_dirty_pages() later on, and that will flip around
- * delalloc bits and dirty the pages as required.
+ * We should be called after prepare_pages() which should have locked
+ * all pages in the range.
*/
- for (i = 0; i < num_pages; i++) {
- set_page_extent_mapped(pages[i]);
+ for (i = 0; i < num_pages; i++)
WARN_ON(!PageLocked(pages[i]));
- }
return ret;
}
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 0d6dcb5ff963..6134e10a6e7f 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -431,11 +431,22 @@ static int io_ctl_prepare_pages(struct btrfs_io_ctl *io_ctl, bool uptodate)
int i;
for (i = 0; i < io_ctl->num_pages; i++) {
+ int ret;
+
page = find_or_create_page(inode->i_mapping, i, mask);
if (!page) {
io_ctl_drop_pages(io_ctl);
return -ENOMEM;
}
+
+ ret = set_page_extent_mapped(page);
+ if (ret < 0) {
+ unlock_page(page);
+ put_page(page);
+ io_ctl_drop_pages(io_ctl);
+ return ret;
+ }
+
io_ctl->pages[i] = page;
if (uptodate && !PageUptodate(page)) {
btrfs_readpage(NULL, page);
@@ -455,10 +466,8 @@ static int io_ctl_prepare_pages(struct btrfs_io_ctl *io_ctl, bool uptodate)
}
}
- for (i = 0; i < io_ctl->num_pages; i++) {
+ for (i = 0; i < io_ctl->num_pages; i++)
clear_page_dirty_for_io(io_ctl->pages[i]);
- set_page_extent_mapped(io_ctl->pages[i]);
- }
return 0;
}
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 3337c8ee7928..5522e9d09c8a 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4720,6 +4720,9 @@ again:
ret = -ENOMEM;
goto out;
}
+ ret = set_page_extent_mapped(page);
+ if (ret < 0)
+ goto out_unlock;
if (!PageUptodate(page)) {
ret = btrfs_readpage(NULL, page);
@@ -4737,7 +4740,6 @@ again:
wait_on_page_writeback(page);
lock_extent_bits(io_tree, block_start, block_end, &cached_state);
- set_page_extent_mapped(page);
ordered = btrfs_lookup_ordered_extent(inode, block_start);
if (ordered) {
@@ -8125,7 +8127,7 @@ static int __btrfs_releasepage(struct page *page, gfp_t gfp_flags)
{
int ret = try_release_extent_mapping(page, gfp_flags);
if (ret == 1)
- detach_page_private(page);
+ clear_page_extent_mapped(page);
return ret;
}
@@ -8285,7 +8287,7 @@ again:
}
ClearPageChecked(page);
- detach_page_private(page);
+ clear_page_extent_mapped(page);
}
/*
@@ -8364,7 +8366,12 @@ again:
wait_on_page_writeback(page);
lock_extent_bits(io_tree, page_start, page_end, &cached_state);
- set_page_extent_mapped(page);
+ ret2 = set_page_extent_mapped(page);
+ if (ret2 < 0) {
+ ret = vmf_error(ret2);
+ unlock_extent_cached(io_tree, page_start, page_end, &cached_state);
+ goto out_unlock;
+ }
/*
* we can't set the delalloc bits if there are pending ordered
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 7f2935ea8d3a..e6a63f652235 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1314,6 +1314,13 @@ again:
if (!page)
break;
+ ret = set_page_extent_mapped(page);
+ if (ret < 0) {
+ unlock_page(page);
+ put_page(page);
+ break;
+ }
+
page_start = page_offset(page);
page_end = page_start + PAGE_SIZE - 1;
while (1) {
@@ -1435,7 +1442,6 @@ again:
for (i = 0; i < i_done; i++) {
clear_page_dirty_for_io(pages[i]);
ClearPageChecked(pages[i]);
- set_page_extent_mapped(pages[i]);
set_page_dirty(pages[i]);
unlock_page(pages[i]);
put_page(pages[i]);
diff --git a/fs/btrfs/reflink.c b/fs/btrfs/reflink.c
index b03e7891394e..b24396cf2f99 100644
--- a/fs/btrfs/reflink.c
+++ b/fs/btrfs/reflink.c
@@ -81,7 +81,10 @@ static int copy_inline_to_page(struct btrfs_inode *inode,
goto out_unlock;
}
- set_page_extent_mapped(page);
+ ret = set_page_extent_mapped(page);
+ if (ret < 0)
+ goto out_unlock;
+
clear_extent_bit(&inode->io_tree, file_offset, range_end,
EXTENT_DELALLOC | EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG,
0, 0, NULL);
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index d29baf3822a7..473b78874844 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -2679,6 +2679,15 @@ static int relocate_file_extent_cluster(struct inode *inode,
goto out;
}
}
+ ret = set_page_extent_mapped(page);
+ if (ret < 0) {
+ btrfs_delalloc_release_metadata(BTRFS_I(inode),
+ PAGE_SIZE, true);
+ btrfs_delalloc_release_extents(BTRFS_I(inode), PAGE_SIZE);
+ unlock_page(page);
+ put_page(page);
+ goto out;
+ }
if (PageReadahead(page)) {
page_cache_async_readahead(inode->i_mapping,
@@ -2706,8 +2715,6 @@ static int relocate_file_extent_cluster(struct inode *inode,
lock_extent(&BTRFS_I(inode)->io_tree, page_start, page_end);
- set_page_extent_mapped(page);
-
if (nr < cluster->nr &&
page_start + offset == cluster->boundary[nr]) {
set_extent_bits(&BTRFS_I(inode)->io_tree,
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-06 00:40:42 +0300