linux-ext4 - [PATCH 18/19] ext4: add pre-content fsnotify hook for DAX faults

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Message-Id: <20241121112218.8249-19-jack@suse.cz>
Date: Thu, 21 Nov 2024 12:22:17 +0100
From: Jan Kara <jack@...e.cz>
To: <linux-fsdevel@...r.kernel.org>
Cc: Amir Goldstein <amir73il@...il.com>,
	Josef Bacik <josef@...icpanda.com>,
	brauner@...nel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Al Viro <viro@...IV.linux.org.uk>,
	linux-xfs@...r.kernel.org,
	linux-btrfs@...r.kernel.org,
	linux-ext4@...r.kernel.org,
	linux-mm@...ck.org,
	Jan Kara <jack@...e.cz>
Subject: [PATCH 18/19] ext4: add pre-content fsnotify hook for DAX faults

ext4 has its own handling for DAX faults. Add the pre-content fsnotify
hook for this case.

Signed-off-by: Jan Kara <jack@...e.cz>
---
 fs/ext4/file.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index f14aed14b9cf..07946bf67944 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -737,6 +737,9 @@ static vm_fault_t ext4_dax_huge_fault(struct vm_fault *vmf, unsigned int order)
 			return VM_FAULT_SIGBUS;
 		}
 	} else {
+		result = filemap_fsnotify_fault(vmf);
+		if (unlikely(result))
+			return result;
 		filemap_invalidate_lock_shared(mapping);
 	}
 	result = dax_iomap_fault(vmf, order, &pfn, &error, &ext4_iomap_ops);
-- 
2.35.3