A length that exceeds the real size of the inode may be specified from user, although these out-of-range areas are not mapped, but they still need to be check in while loop, which is unnecessary.
Signed-off-by: Zhiguo Niu <zhiguo....@unisoc.com> --- v2: check i_size within inode lock according to Chao's suggestions --- --- fs/f2fs/file.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 128e53d..cf63db7 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -2608,9 +2608,6 @@ static int f2fs_defragment_range(struct f2fs_sb_info *sbi, bool fragmented = false; int err; - pg_start = range->start >> PAGE_SHIFT; - pg_end = (range->start + range->len) >> PAGE_SHIFT; - f2fs_balance_fs(sbi, true); inode_lock(inode); @@ -2629,10 +2626,16 @@ static int f2fs_defragment_range(struct f2fs_sb_info *sbi, /* writeback all dirty pages in the range */ err = filemap_write_and_wait_range(inode->i_mapping, range->start, - range->start + range->len - 1); + min_t(loff_t, range->start + range->len - 1, + i_size_read(inode) - 1)); if (err) goto out; + pg_start = range->start >> PAGE_SHIFT; + pg_end = min_t(pgoff_t, + (range->start + range->len) >> PAGE_SHIFT, + DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE)); + /* * lookup mapping info in extent cache, skip defragmenting if physical * block addresses are continuous. -- 1.9.1 _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel