linux-ext4 - [PATCH v2 10/23] xfs: add XBF_VERITY_CHECKED xfs

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Date:   Tue,  4 Apr 2023 16:53:06 +0200
From:   Andrey Albershteyn <aalbersh@...hat.com>
To:     djwong@...nel.org, dchinner@...hat.com, ebiggers@...nel.org,
        hch@...radead.org, linux-xfs@...r.kernel.org,
        fsverity@...ts.linux.dev
Cc:     rpeterso@...hat.com, agruenba@...hat.com, xiang@...nel.org,
        chao@...nel.org, damien.lemoal@...nsource.wdc.com, jth@...nel.org,
        linux-erofs@...ts.ozlabs.org, linux-btrfs@...r.kernel.org,
        linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
        cluster-devel@...hat.com, Andrey Albershteyn <aalbersh@...hat.com>
Subject: [PATCH v2 10/23] xfs: add XBF_VERITY_CHECKED xfs_buf flag

The meaning of the flag is that value of the extended attribute in
the buffer was verified. The underlying pages have PageChecked() ==
false (the way fs-verity identifies verified pages), as page content
will be copied out to newly allocated pages in further patches.

The flag is being used later to SetPageChecked() on pages handed to
the fs-verity.

Signed-off-by: Andrey Albershteyn <aalbersh@...hat.com>
---
 fs/xfs/xfs_buf.h | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index 549c60942208..8cc86fed962b 100644
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -24,14 +24,15 @@ struct xfs_buf;
 
 #define XFS_BUF_DADDR_NULL	((xfs_daddr_t) (-1LL))
 
-#define XBF_READ	 (1u << 0) /* buffer intended for reading from device */
-#define XBF_WRITE	 (1u << 1) /* buffer intended for writing to device */
-#define XBF_READ_AHEAD	 (1u << 2) /* asynchronous read-ahead */
-#define XBF_NO_IOACCT	 (1u << 3) /* bypass I/O accounting (non-LRU bufs) */
-#define XBF_ASYNC	 (1u << 4) /* initiator will not wait for completion */
-#define XBF_DONE	 (1u << 5) /* all pages in the buffer uptodate */
-#define XBF_STALE	 (1u << 6) /* buffer has been staled, do not find it */
-#define XBF_WRITE_FAIL	 (1u << 7) /* async writes have failed on this buffer */
+#define XBF_READ		(1u << 0) /* buffer intended for reading from device */
+#define XBF_WRITE		(1u << 1) /* buffer intended for writing to device */
+#define XBF_READ_AHEAD		(1u << 2) /* asynchronous read-ahead */
+#define XBF_NO_IOACCT		(1u << 3) /* bypass I/O accounting (non-LRU bufs) */
+#define XBF_ASYNC		(1u << 4) /* initiator will not wait for completion */
+#define XBF_DONE		(1u << 5) /* all pages in the buffer uptodate */
+#define XBF_STALE		(1u << 6) /* buffer has been staled, do not find it */
+#define XBF_WRITE_FAIL		(1u << 7) /* async writes have failed on this buffer */
+#define XBF_VERITY_CHECKED	(1u << 8) /* buffer was verified by fs-verity*/
 
 /* buffer type flags for write callbacks */
 #define _XBF_INODES	 (1u << 16)/* inode buffer */
-- 
2.38.4