[PATCH v4 7/8] fuse: support changing per-file DAX flag inside guest
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STALE1847d
SUPERSEDED
From: Jeffle Xu <jefflexu@linux.alibaba.com>
Date: 2021-08-17 02:22:31
Also in:
linux-fsdevel
Subsystem:
filesystems (vfs and infrastructure), fuse filesystem [core], the rest · Maintainers:
Alexander Viro, Christian Brauner, Miklos Szeredi, Linus Torvalds
Revision v4 of 5 in this series.
Revisions (5)
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@linux.alibaba.com> --- 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
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