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authorDaeho Jeong <daehojeong@google.com>2023-04-18 10:52:06 -0700
committerJaegeuk Kim <jaegeuk@kernel.org>2023-04-24 11:03:10 -0700
commit591fc34e1f98b0d7eef4aa3440bfdff3c5a1cadd (patch)
tree451f719d0a1e78c1476397ca09d340f16dbc9236 /fs/f2fs/data.c
parent2e2c6e9b72ce3d137984c867eb5625b8498cfe2b (diff)
f2fs: use cow inode data when updating atomic write
Need to use cow inode data content instead of the one in the original inode, when we try to write the already updated atomic write files. Signed-off-by: Daeho Jeong <daehojeong@google.com> Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/data.c')
-rw-r--r--fs/f2fs/data.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 8df225014304..7165b1202f53 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -3491,7 +3491,7 @@ unlock_out:
static int prepare_atomic_write_begin(struct f2fs_sb_info *sbi,
struct page *page, loff_t pos, unsigned int len,
- block_t *blk_addr, bool *node_changed)
+ block_t *blk_addr, bool *node_changed, bool *use_cow)
{
struct inode *inode = page->mapping->host;
struct inode *cow_inode = F2FS_I(inode)->cow_inode;
@@ -3505,10 +3505,12 @@ static int prepare_atomic_write_begin(struct f2fs_sb_info *sbi,
/* Look for the block in COW inode first */
err = __find_data_block(cow_inode, index, blk_addr);
- if (err)
+ if (err) {
return err;
- else if (*blk_addr != NULL_ADDR)
+ } else if (*blk_addr != NULL_ADDR) {
+ *use_cow = true;
return 0;
+ }
if (is_inode_flag_set(inode, FI_ATOMIC_REPLACE))
goto reserve_block;
@@ -3538,6 +3540,7 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping,
struct page *page = NULL;
pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT;
bool need_balance = false;
+ bool use_cow = false;
block_t blkaddr = NULL_ADDR;
int err = 0;
@@ -3597,7 +3600,7 @@ repeat:
if (f2fs_is_atomic_file(inode))
err = prepare_atomic_write_begin(sbi, page, pos, len,
- &blkaddr, &need_balance);
+ &blkaddr, &need_balance, &use_cow);
else
err = prepare_write_begin(sbi, page, pos, len,
&blkaddr, &need_balance);
@@ -3637,7 +3640,9 @@ repeat:
f2fs_handle_error(sbi, ERROR_INVALID_BLKADDR);
goto fail;
}
- err = f2fs_submit_page_read(inode, page, blkaddr, 0, true);
+ err = f2fs_submit_page_read(use_cow ?
+ F2FS_I(inode)->cow_inode : inode, page,
+ blkaddr, 0, true);
if (err)
goto fail;