diff mbox series

[v3,15/16] gfs2: add pre-content fsnotify hook to fault

Message ID 71aa4357e168f298d18910495da7467eec5fb79c.1723228772.git.josef@toxicpanda.com (mailing list archive)
State New
Headers show
Series fanotify: add pre-content hooks | expand

Commit Message

Josef Bacik Aug. 9, 2024, 6:44 p.m. UTC 
gfs2 takes the glock before calling into filemap fault, so add the
fsnotify hook for ->fault before we take the glock in order to avoid any
possible deadlock with the HSM.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
---
 fs/gfs2/file.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 08982937b5df..d4af70d765e0 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -556,6 +556,10 @@  static vm_fault_t gfs2_fault(struct vm_fault *vmf)
 	vm_fault_t ret;
 	int err;
 
+	ret = filemap_maybe_emit_fsnotify_event(vmf);
+	if (unlikely(ret))
+		return ret;
+
 	gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
 	err = gfs2_glock_nq(&gh);
 	if (err) {