From: "Dr. David Alan Gilbert (git)" <dgilbert@redhat.com>
To: qemu-devel@nongnu.org, vgoyal@redhat.com, stefanha@redhat.com,
groug@kaod.org
Cc: virtio-fs@redhat.com
Subject: [PATCH v3 12/26] DAX: virtiofsd: Add setup/remove mappings fuse commands
Date: Wed, 28 Apr 2021 12:00:46 +0100 [thread overview]
Message-ID: <20210428110100.27757-13-dgilbert@redhat.com> (raw)
In-Reply-To: <20210428110100.27757-1-dgilbert@redhat.com>
From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Add commands so that the guest kernel can ask the daemon to map file
sections into a guest kernel visible cache.
Note: Catherine Ho had sent a patch to fix an issue with multiple
removemapping. It was a merge issue though.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Peng Tao <tao.peng@linux.alibaba.com>
Including-fixes: Catherine Ho <catherine.hecx@gmail.com>
Signed-off-by: Catherine Ho <catherine.hecx@gmail.com>
---
tools/virtiofsd/fuse_lowlevel.c | 69 +++++++++++++++++++++++++++++++++
tools/virtiofsd/fuse_lowlevel.h | 23 ++++++++++-
2 files changed, 91 insertions(+), 1 deletion(-)
diff --git a/tools/virtiofsd/fuse_lowlevel.c b/tools/virtiofsd/fuse_lowlevel.c
index 58e32fc963..a1a8730b73 100644
--- a/tools/virtiofsd/fuse_lowlevel.c
+++ b/tools/virtiofsd/fuse_lowlevel.c
@@ -1870,6 +1870,73 @@ static void do_lseek(fuse_req_t req, fuse_ino_t nodeid,
}
}
+static void do_setupmapping(fuse_req_t req, fuse_ino_t nodeid,
+ struct fuse_mbuf_iter *iter)
+{
+ struct fuse_setupmapping_in *arg;
+ struct fuse_file_info fi;
+
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
+ if (!arg) {
+ fuse_reply_err(req, EINVAL);
+ return;
+ }
+
+ memset(&fi, 0, sizeof(fi));
+ fi.fh = arg->fh;
+
+ /*
+ * TODO: Need to come up with a better definition of flags here; it can't
+ * be the kernel view of the flags, since that's abstracted from the client
+ * similarly, it's not the vhost-user set
+ * for now just use O_ flags
+ */
+ uint64_t genflags;
+
+ genflags = O_RDONLY;
+ if (arg->flags & FUSE_SETUPMAPPING_FLAG_WRITE) {
+ genflags = O_RDWR;
+ }
+
+ if (req->se->op.setupmapping) {
+ req->se->op.setupmapping(req, nodeid, arg->foffset, arg->len,
+ arg->moffset, genflags, &fi);
+ } else {
+ fuse_reply_err(req, ENOSYS);
+ }
+}
+
+static void do_removemapping(fuse_req_t req, fuse_ino_t nodeid,
+ struct fuse_mbuf_iter *iter)
+{
+ struct fuse_removemapping_in *arg;
+ struct fuse_removemapping_one *one;
+
+ arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
+ if (!arg || !arg->count ||
+ (uint64_t)arg->count * sizeof(*one) >= SIZE_MAX) {
+ fuse_log(FUSE_LOG_ERR, "do_removemapping: invalid arg %p\n", arg);
+ fuse_reply_err(req, EINVAL);
+ return;
+ }
+
+ one = fuse_mbuf_iter_advance(iter, arg->count * sizeof(*one));
+ if (!one) {
+ fuse_log(
+ FUSE_LOG_ERR,
+ "do_removemapping: invalid in, expected %d * %zd, has %zd - %zd\n",
+ arg->count, sizeof(*one), iter->size, iter->pos);
+ fuse_reply_err(req, EINVAL);
+ return;
+ }
+
+ if (req->se->op.removemapping) {
+ req->se->op.removemapping(req, req->se, nodeid, arg->count, one);
+ } else {
+ fuse_reply_err(req, ENOSYS);
+ }
+}
+
static void do_init(fuse_req_t req, fuse_ino_t nodeid,
struct fuse_mbuf_iter *iter)
{
@@ -2267,6 +2334,8 @@ static struct {
[FUSE_RENAME2] = { do_rename2, "RENAME2" },
[FUSE_COPY_FILE_RANGE] = { do_copy_file_range, "COPY_FILE_RANGE" },
[FUSE_LSEEK] = { do_lseek, "LSEEK" },
+ [FUSE_SETUPMAPPING] = { do_setupmapping, "SETUPMAPPING" },
+ [FUSE_REMOVEMAPPING] = { do_removemapping, "REMOVEMAPPING" },
};
#define FUSE_MAXOP (sizeof(fuse_ll_ops) / sizeof(fuse_ll_ops[0]))
diff --git a/tools/virtiofsd/fuse_lowlevel.h b/tools/virtiofsd/fuse_lowlevel.h
index 3383e3a8a0..0bf206264d 100644
--- a/tools/virtiofsd/fuse_lowlevel.h
+++ b/tools/virtiofsd/fuse_lowlevel.h
@@ -24,6 +24,7 @@
#endif
#include "fuse_common.h"
+#include "standard-headers/linux/fuse.h"
#include <sys/statvfs.h>
#include <sys/uio.h>
@@ -1171,7 +1172,6 @@ struct fuse_lowlevel_ops {
*/
void (*readdirplus)(fuse_req_t req, fuse_ino_t ino, size_t size, off_t off,
struct fuse_file_info *fi);
-
/**
* Copy a range of data from one file to another
*
@@ -1227,6 +1227,27 @@ struct fuse_lowlevel_ops {
*/
void (*lseek)(fuse_req_t req, fuse_ino_t ino, off_t off, int whence,
struct fuse_file_info *fi);
+
+ /*
+ * Map file sections into kernel visible cache
+ *
+ * Map a section of the file into address space visible to the kernel
+ * mounting the filesystem.
+ * TODO
+ */
+ void (*setupmapping)(fuse_req_t req, fuse_ino_t ino, uint64_t foffset,
+ uint64_t len, uint64_t moffset, uint64_t flags,
+ struct fuse_file_info *fi);
+
+ /*
+ * Unmap file sections in kernel visible cache
+ *
+ * Unmap sections previously mapped by setupmapping
+ * TODO
+ */
+ void (*removemapping)(fuse_req_t req, struct fuse_session *se,
+ fuse_ino_t ino, unsigned num,
+ struct fuse_removemapping_one *argp);
};
/**
--
2.31.1
next prev parent reply other threads:[~2021-04-28 11:17 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-28 11:00 [PATCH v3 00/26] virtiofs dax patches Dr. David Alan Gilbert (git)
2021-04-28 11:00 ` [PATCH v3 01/26] virtiofs: Fixup printf args Dr. David Alan Gilbert (git)
2021-05-04 14:54 ` Stefan Hajnoczi
2021-05-05 11:06 ` Dr. David Alan Gilbert
2021-05-06 15:56 ` Dr. David Alan Gilbert
2021-04-28 11:00 ` [PATCH v3 02/26] virtiofsd: Don't assume header layout Dr. David Alan Gilbert (git)
2021-05-04 15:12 ` Stefan Hajnoczi
2021-05-06 15:56 ` Dr. David Alan Gilbert
2021-04-28 11:00 ` [PATCH v3 03/26] DAX: vhost-user: Rework slave return values Dr. David Alan Gilbert (git)
2021-05-04 15:23 ` Stefan Hajnoczi
2021-05-27 15:59 ` Dr. David Alan Gilbert
2021-04-28 11:00 ` [PATCH v3 04/26] DAX: libvhost-user: Route slave message payload Dr. David Alan Gilbert (git)
2021-05-04 15:26 ` Stefan Hajnoczi
2021-04-28 11:00 ` [PATCH v3 05/26] DAX: libvhost-user: Allow popping a queue element with bad pointers Dr. David Alan Gilbert (git)
2021-04-28 11:00 ` [PATCH v3 06/26] DAX subprojects/libvhost-user: Add virtio-fs slave types Dr. David Alan Gilbert (git)
2021-04-29 15:48 ` Dr. David Alan Gilbert
2021-04-28 11:00 ` [PATCH v3 07/26] DAX: virtio: Add shared memory capability Dr. David Alan Gilbert (git)
2021-04-28 11:00 ` [PATCH v3 08/26] DAX: virtio-fs: Add cache BAR Dr. David Alan Gilbert (git)
2021-05-05 12:12 ` Stefan Hajnoczi
2021-05-05 18:59 ` Dr. David Alan Gilbert
2021-04-28 11:00 ` [PATCH v3 09/26] DAX: virtio-fs: Add vhost-user slave commands for mapping Dr. David Alan Gilbert (git)
2021-05-05 14:15 ` Stefan Hajnoczi
2021-05-27 16:57 ` Dr. David Alan Gilbert
2021-04-28 11:00 ` [PATCH v3 10/26] DAX: virtio-fs: Fill in " Dr. David Alan Gilbert (git)
2021-05-05 16:43 ` Stefan Hajnoczi
2021-04-28 11:00 ` [PATCH v3 11/26] DAX: virtiofsd Add cache accessor functions Dr. David Alan Gilbert (git)
2021-04-28 11:00 ` Dr. David Alan Gilbert (git) [this message]
2021-05-06 15:02 ` [PATCH v3 12/26] DAX: virtiofsd: Add setup/remove mappings fuse commands Stefan Hajnoczi
2021-04-28 11:00 ` [PATCH v3 13/26] DAX: virtiofsd: Add setup/remove mapping handlers to passthrough_ll Dr. David Alan Gilbert (git)
2021-04-28 11:00 ` [PATCH v3 14/26] DAX: virtiofsd: Wire up passthrough_ll's lo_setupmapping Dr. David Alan Gilbert (git)
2021-04-28 11:00 ` [PATCH v3 15/26] DAX: virtiofsd: Make lo_removemapping() work Dr. David Alan Gilbert (git)
2021-04-28 11:00 ` [PATCH v3 16/26] DAX: virtiofsd: route se down to destroy method Dr. David Alan Gilbert (git)
2021-04-28 11:00 ` [PATCH v3 17/26] DAX: virtiofsd: Perform an unmap on destroy Dr. David Alan Gilbert (git)
2021-04-28 11:00 ` [PATCH v3 18/26] DAX/unmap: virtiofsd: Add VHOST_USER_SLAVE_FS_IO Dr. David Alan Gilbert (git)
2021-05-06 15:12 ` Stefan Hajnoczi
2021-05-27 17:44 ` Dr. David Alan Gilbert
2021-05-06 15:16 ` Stefan Hajnoczi
2021-05-27 17:31 ` Dr. David Alan Gilbert
2021-04-28 11:00 ` [PATCH v3 19/26] DAX/unmap virtiofsd: Add wrappers for VHOST_USER_SLAVE_FS_IO Dr. David Alan Gilbert (git)
2021-04-28 12:53 ` Dr. David Alan Gilbert
2021-04-28 11:00 ` [PATCH v3 20/26] DAX/unmap virtiofsd: Parse unmappable elements Dr. David Alan Gilbert (git)
2021-05-06 15:23 ` Stefan Hajnoczi
2021-05-27 17:56 ` Dr. David Alan Gilbert
2021-04-28 11:00 ` [PATCH v3 21/26] DAX/unmap virtiofsd: Route unmappable reads Dr. David Alan Gilbert (git)
2021-05-06 15:27 ` Stefan Hajnoczi
2021-04-28 11:00 ` [PATCH v3 22/26] DAX/unmap virtiofsd: route unmappable write to slave command Dr. David Alan Gilbert (git)
2021-05-06 15:28 ` Stefan Hajnoczi
2021-04-28 11:00 ` [PATCH v3 23/26] DAX:virtiofsd: implement FUSE_INIT map_alignment field Dr. David Alan Gilbert (git)
2021-04-28 11:00 ` [PATCH v3 24/26] vhost-user-fs: Extend VhostUserFSSlaveMsg to pass additional info Dr. David Alan Gilbert (git)
2021-05-06 15:31 ` Stefan Hajnoczi
2021-05-06 15:32 ` Stefan Hajnoczi
2021-04-28 11:00 ` [PATCH v3 25/26] vhost-user-fs: Implement drop CAP_FSETID functionality Dr. David Alan Gilbert (git)
2021-04-28 11:01 ` [PATCH v3 26/26] virtiofsd: Ask qemu to drop CAP_FSETID if client asked for it Dr. David Alan Gilbert (git)
2021-05-06 15:37 ` Stefan Hajnoczi
2021-05-06 16:02 ` Vivek Goyal
2021-05-10 9:05 ` Stefan Hajnoczi
2021-05-10 15:23 ` Vivek Goyal
2021-05-10 15:32 ` Stefan Hajnoczi
2021-05-27 19:09 ` Dr. David Alan Gilbert
2021-06-10 15:29 ` Dr. David Alan Gilbert
2021-06-10 16:23 ` Stefan Hajnoczi
2021-06-16 12:36 ` Dr. David Alan Gilbert
2021-06-16 15:29 ` Stefan Hajnoczi
2021-06-16 18:35 ` Dr. David Alan Gilbert
2021-04-28 11:27 ` [PATCH v3 00/26] virtiofs dax patches no-reply
2021-05-06 15:37 ` Stefan Hajnoczi
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=20210428110100.27757-13-dgilbert@redhat.com \
--to=dgilbert@redhat.com \
--cc=groug@kaod.org \
--cc=qemu-devel@nongnu.org \
--cc=stefanha@redhat.com \
--cc=vgoyal@redhat.com \
--cc=virtio-fs@redhat.com \
/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 read-only IMAP folder(s) and NNTP newsgroup(s).