From af75a621ef3488754d9e86cbc13198def6ee8bd3 Mon Sep 17 00:00:00 2001 From: Chao Yu Date: Sun, 5 Nov 2017 21:53:30 +0800 Subject: [PATCH] f2fs: keep isize once block is reserved cross EOF Without FADVISE_KEEP_SIZE_BIT, we will try to recover file size according to last non-hole block, so in fallocate(), we must set FADVISE_KEEP_SIZE_BIT flag once we have preallocated block cross EOF, instead of when all preallocation is success. Otherwise, file size will be incorrect due to lack of this flag. Simple testcase to reproduce this: 1. echo 2 > /sys/fs/f2fs//inject_type 2. echo 10 > /sys/fs/f2fs//inject_rate 3. run tests/generic/392 4. disable fault injection 5. do remount Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim --- fs/f2fs/file.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 6034f693f92f..ab481f63b8b1 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -1473,8 +1473,12 @@ static int expand_inode_data(struct inode *inode, loff_t offset, new_size = ((loff_t)pg_end << PAGE_SHIFT) + off_end; } - if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size) - f2fs_i_size_write(inode, new_size); + if (new_size > i_size_read(inode)) { + if (mode & FALLOC_FL_KEEP_SIZE) + file_set_keep_isize(inode); + else + f2fs_i_size_write(inode, new_size); + } return err; } @@ -1521,8 +1525,6 @@ static long f2fs_fallocate(struct file *file, int mode, if (!ret) { inode->i_mtime = inode->i_ctime = current_time(inode); f2fs_mark_inode_dirty_sync(inode, false); - if (mode & FALLOC_FL_KEEP_SIZE) - file_set_keep_isize(inode); f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); } -- 2.20.1