From: Jeffle Xu <jefflexu@linux.alibaba.com>
To: vgoyal@redhat.com, stefanha@redhat.com, miklos@szeredi.hu
Cc: linux-fsdevel@vger.kernel.org,
virtualization@lists.linux-foundation.org, virtio-fs@redhat.com,
joseph.qi@linux.alibaba.com, bo.liu@linux.alibaba.com
Subject: [virtiofsd PATCH v4 4/4] virtiofsd: support per-file DAX in FUSE_LOOKUP
Date: Tue, 17 Aug 2021 10:23:47 +0800 [thread overview]
Message-ID: <20210817022347.18098-5-jefflexu@linux.alibaba.com> (raw)
In-Reply-To: <20210817022347.18098-1-jefflexu@linux.alibaba.com>
For passthrough, when the corresponding virtiofs in guest is mounted
with '-o dax=inode', advertise that the file is capable of per-file
DAX if the inode in the backend fs is marked with FS_DAX_FL flag.
Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
---
tools/virtiofsd/passthrough_ll.c | 43 ++++++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c
index 5b6228210f..4cbd904248 100644
--- a/tools/virtiofsd/passthrough_ll.c
+++ b/tools/virtiofsd/passthrough_ll.c
@@ -171,6 +171,7 @@ struct lo_data {
int allow_direct_io;
int announce_submounts;
int perfile_dax_cap; /* capability of backend fs */
+ bool perfile_dax; /* enable per-file DAX or not */
bool use_statx;
struct lo_inode root;
GHashTable *inodes; /* protected by lo->mutex */
@@ -716,6 +717,10 @@ static void lo_init(void *userdata, struct fuse_conn_info *conn)
if (conn->capable & FUSE_CAP_PERFILE_DAX && lo->perfile_dax_cap ) {
conn->want |= FUSE_CAP_PERFILE_DAX;
+ lo->perfile_dax = 1;
+ }
+ else {
+ lo->perfile_dax = 0;
}
}
@@ -983,6 +988,41 @@ static int do_statx(struct lo_data *lo, int dirfd, const char *pathname,
return 0;
}
+/*
+ * If the file is marked with FS_DAX_FL or FS_XFLAG_DAX, then DAX should be
+ * enabled for this file.
+ */
+static bool lo_should_enable_dax(struct lo_data *lo, struct lo_inode *dir,
+ const char *name)
+{
+ int res, fd;
+ int ret = false;;
+ unsigned int attr;
+ struct fsxattr xattr;
+
+ if (!lo->perfile_dax)
+ return false;
+
+ /* Open file without O_PATH, so that ioctl can be called. */
+ fd = openat(dir->fd, name, O_NOFOLLOW);
+ if (fd == -1)
+ return false;
+
+ if (lo->perfile_dax_cap == DAX_CAP_FLAGS) {
+ res = ioctl(fd, FS_IOC_GETFLAGS, &attr);
+ if (!res && (attr & FS_DAX_FL))
+ ret = true;
+ }
+ else if (lo->perfile_dax_cap == DAX_CAP_XATTR) {
+ res = ioctl(fd, FS_IOC_FSGETXATTR, &xattr);
+ if (!res && (xattr.fsx_xflags & FS_XFLAG_DAX))
+ ret = true;
+ }
+
+ close(fd);
+ return ret;
+}
+
/*
* Increments nlookup on the inode on success. unref_inode_lolocked() must be
* called eventually to decrement nlookup again. If inodep is non-NULL, the
@@ -1038,6 +1078,9 @@ static int lo_do_lookup(fuse_req_t req, fuse_ino_t parent, const char *name,
e->attr_flags |= FUSE_ATTR_SUBMOUNT;
}
+ if (lo_should_enable_dax(lo, dir, name))
+ e->attr_flags |= FUSE_ATTR_DAX;
+
inode = lo_find(lo, &e->attr, mnt_id);
if (inode) {
close(newfd);
--
2.27.0
next prev parent reply other threads:[~2021-08-17 2:23 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-17 2:22 [PATCH v4 0/8] fuse,virtiofs: support per-file DAX Jeffle Xu
2021-08-17 2:22 ` [PATCH v4 1/8] fuse: add fuse_should_enable_dax() helper Jeffle Xu
2021-08-17 2:22 ` [PATCH v4 2/8] fuse: Make DAX mount option a tri-state Jeffle Xu
2021-08-17 2:22 ` [PATCH v4 3/8] fuse: support per-file DAX Jeffle Xu
2021-08-17 2:22 ` [PATCH v4 4/8] fuse: negotiate if server/client supports " Jeffle Xu
2021-08-17 2:22 ` [PATCH v4 5/8] fuse: enable " Jeffle Xu
2021-08-17 2:22 ` [PATCH v4 6/8] fuse: mark inode DONT_CACHE when per-file DAX indication changes Jeffle Xu
2021-08-17 10:26 ` [Virtio-fs] " Dr. David Alan Gilbert
2021-08-17 13:23 ` JeffleXu
2021-08-17 2:22 ` [PATCH v4 7/8] fuse: support changing per-file DAX flag inside guest Jeffle Xu
2021-08-17 2:22 ` [PATCH v4 8/8] fuse: show '-o dax=inode' option only when FUSE server supports Jeffle Xu
2021-08-17 2:23 ` [virtiofsd PATCH v4 0/4] virtiofsd: support per-file DAX Jeffle Xu
2021-08-17 2:23 ` [virtiofsd PATCH v4 1/4] virtiofsd: add .ioctl() support Jeffle Xu
2021-08-18 17:33 ` Vivek Goyal
2021-08-17 2:23 ` [virtiofsd PATCH v4 2/4] virtiofsd: expand fuse protocol to support per-file DAX Jeffle Xu
2021-08-17 2:23 ` [virtiofsd PATCH v4 3/4] virtiofsd: support per-file DAX negotiation in FUSE_INIT Jeffle Xu
2021-08-17 17:15 ` [Virtio-fs] " Dr. David Alan Gilbert
2021-08-18 5:28 ` JeffleXu
2021-08-19 13:57 ` Dr. David Alan Gilbert
2021-08-18 17:30 ` Vivek Goyal
2021-08-17 2:23 ` Jeffle Xu [this message]
2021-08-17 19:00 ` [Virtio-fs] [virtiofsd PATCH v4 4/4] virtiofsd: support per-file DAX in FUSE_LOOKUP Dr. David Alan Gilbert
2021-08-18 5:46 ` JeffleXu
2021-08-19 13:08 ` Dr. David Alan Gilbert
2021-08-20 5:03 ` JeffleXu
2021-08-24 10:15 ` Greg Kurz
2021-09-08 10:34 ` JeffleXu
2021-08-17 8:06 ` [PATCH v4 0/8] fuse,virtiofs: support per-file DAX Miklos Szeredi
2021-08-17 9:32 ` [Virtio-fs] " Dr. David Alan Gilbert
2021-08-17 10:09 ` Miklos Szeredi
2021-08-17 10:37 ` Dr. David Alan Gilbert
2021-08-17 13:08 ` JeffleXu
2021-08-17 14:11 ` Miklos Szeredi
2021-08-17 15:19 ` Vivek Goyal
2021-08-17 14:54 ` Vivek Goyal
2021-08-18 5:10 ` JeffleXu
2021-08-19 6:14 ` JeffleXu
2021-08-17 12:40 ` Vivek Goyal
2021-09-16 8:21 ` JeffleXu
2021-09-18 3:06 ` JeffleXu
2021-09-19 19:45 ` Vivek Goyal
2021-09-22 8:16 ` JeffleXu
2021-08-17 12:39 ` Vivek Goyal
2021-08-17 13:22 ` JeffleXu
2021-08-17 14:08 ` Miklos Szeredi
2021-08-18 3:39 ` JeffleXu
2021-08-18 5:08 ` Miklos Szeredi
2021-08-18 16:58 ` Vivek Goyal
2021-09-03 5:30 ` JeffleXu
2021-09-07 14:51 ` Miklos Szeredi
2021-08-17 14:57 ` Vivek Goyal
2021-08-18 5:20 ` JeffleXu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210817022347.18098-5-jefflexu@linux.alibaba.com \
--to=jefflexu@linux.alibaba.com \
--cc=bo.liu@linux.alibaba.com \
--cc=joseph.qi@linux.alibaba.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=miklos@szeredi.hu \
--cc=stefanha@redhat.com \
--cc=vgoyal@redhat.com \
--cc=virtio-fs@redhat.com \
--cc=virtualization@lists.linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).