>From 83ea3af40033e4214383a9846d8180d9c096c2e0 Mon Sep 17 00:00:00 2001 From: Dmitry Monakhov <[email protected]> Date: Tue, 29 Sep 2015 14:35:25 +0400 Subject: [RH7 PATCH] ext4: drop pfcache csum on fallocate v2
If fallocate will change file's data we have to drop csum. https://jira.sw.ru/browse/PSBM-33644 Signed-off-by: Dmitry Monakhov <[email protected]> --- fs/ext4/extents.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 08b0709..bac9339 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -5062,6 +5062,11 @@ long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len) FALLOC_FL_CONVERT_AND_EXTEND)) return -EOPNOTSUPP; + /* If data is about to change we must drop csum */ + if (ext4_test_inode_state(inode, EXT4_STATE_PFCACHE_CSUM) && + ((mode & ~FALLOC_FL_KEEP_SIZE) || !(mode & FALLOC_FL_KEEP_SIZE))) + ext4_truncate_data_csum(inode, -1); + if (mode & FALLOC_FL_PUNCH_HOLE) return ext4_punch_hole(inode, offset, len); -- 1.7.1
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