Fuse client can enable or disable per-file DAX inside kernel/guest by
chattr(1). Similarly the new state won't be updated until the file is
closed and reopened later.
Signed-off-by: Jeffle Xu <jefflexu@xxxxxxxxxxxxxxxxx>
---
fs/fuse/ioctl.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/fs/fuse/ioctl.c b/fs/fuse/ioctl.c
index 546ea3d58fb4..a9ed53c5dbd1 100644
--- a/fs/fuse/ioctl.c
+++ b/fs/fuse/ioctl.c
@@ -469,8 +469,6 @@ int fuse_fileattr_set(struct user_namespace *mnt_userns,
if (fa->flags_valid) {
err = fuse_priv_ioctl(inode, ff, FS_IOC_SETFLAGS,
&flags, sizeof(flags));
- if (err)
- goto cleanup;
} else {
memset(&xfa, 0, sizeof(xfa));
xfa.fsx_xflags = fa->fsx_xflags;
@@ -483,6 +481,19 @@ int fuse_fileattr_set(struct user_namespace *mnt_userns,
&xfa, sizeof(xfa));
}
+ if (err)
+ goto cleanup;
+
+ if (IS_ENABLED(CONFIG_FUSE_DAX)) {
+ bool newdax;
+
+ if (fa->flags_valid)
+ newdax = flags & FS_DAX_FL;
+ else
+ newdax = fa->fsx_xflags & FS_XFLAG_DAX;
+ fuse_dax_dontcache(inode, newdax);
+ }
+
cleanup:
fuse_priv_ioctl_cleanup(inode, ff);
--
2.27.0
