From c6f0b395b2110aa26a134a9a395875b1ec0a5aae Mon Sep 17 00:00:00 2001 From: Shiyang Ruan Date: Thu, 1 Dec 2022 15:28:54 +0000 Subject: fsdax,xfs: set the shared flag when file extent is shared If a dax page is shared, mapread at different offsets can also trigger page fault on same dax page. So, change the flag from "cow" to "shared". And get the shared flag from filesystem when read. Link: https://lkml.kernel.org/r/1669908538-55-5-git-send-email-ruansy.fnst@fujitsu.com Signed-off-by: Shiyang Ruan Reviewed-by: Darrick J. Wong Cc: Alistair Popple Cc: Dan Williams Cc: Dave Chinner Cc: Jason Gunthorpe Cc: John Hubbard Signed-off-by: Andrew Morton --- fs/xfs/xfs_iomap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/xfs') diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index 07da03976ec1..881de99766ca 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -1215,7 +1215,7 @@ xfs_read_iomap_begin( return error; error = xfs_bmapi_read(ip, offset_fsb, end_fsb - offset_fsb, &imap, &nimaps, 0); - if (!error && (flags & IOMAP_REPORT)) + if (!error && ((flags & IOMAP_REPORT) || IS_DAX(inode))) error = xfs_reflink_trim_around_shared(ip, &imap, &shared); xfs_iunlock(ip, lockmode); -- cgit v1.2.3