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 06/26] DAX subprojects/libvhost-user: Add virtio-fs slave types
Date: Wed, 28 Apr 2021 12:00:40 +0100 [thread overview]
Message-ID: <20210428110100.27757-7-dgilbert@redhat.com> (raw)
In-Reply-To: <20210428110100.27757-1-dgilbert@redhat.com>
From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Add virtio-fs definitions to libvhost-user
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
---
subprojects/libvhost-user/libvhost-user.c | 48 +++++++++++++++++++++++
subprojects/libvhost-user/libvhost-user.h | 40 +++++++++++++++++++
2 files changed, 88 insertions(+)
diff --git a/subprojects/libvhost-user/libvhost-user.c b/subprojects/libvhost-user/libvhost-user.c
index 68eb165755..97c909c6a8 100644
--- a/subprojects/libvhost-user/libvhost-user.c
+++ b/subprojects/libvhost-user/libvhost-user.c
@@ -2918,3 +2918,51 @@ vu_queue_push(VuDev *dev, VuVirtq *vq,
vu_queue_flush(dev, vq, 1);
vu_queue_inflight_post_put(dev, vq, elem->index);
}
+
+int64_t vu_fs_cache_request(VuDev *dev, VhostUserSlaveRequest req, int fd,
+ VhostUserFSSlaveMsg *fsm)
+{
+ int fd_num = 0;
+ bool res;
+ uint64_t payload = 0;
+ VhostUserMsg vmsg = {
+ .request = req,
+ .flags = VHOST_USER_VERSION | VHOST_USER_NEED_REPLY_MASK,
+ .payload.fs = *fsm,
+ };
+
+ if (fsm->count > VHOST_USER_FS_SLAVE_MAX_ENTRIES) {
+ return -EINVAL;
+ }
+
+ vmsg.size = sizeof(VhostUserFSSlaveMsg) +
+ fsm->count * sizeof(VhostUserFSSlaveMsgEntry);
+ memcpy(&vmsg.payload.fs, fsm, vmsg.size);
+
+ if (fd != -1) {
+ vmsg.fds[fd_num++] = fd;
+ }
+
+ vmsg.fd_num = fd_num;
+
+ if (!vu_has_protocol_feature(dev, VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD)) {
+ return -EINVAL;
+ }
+
+ pthread_mutex_lock(&dev->slave_mutex);
+ if (!vu_message_write(dev, dev->slave_fd, &vmsg)) {
+ pthread_mutex_unlock(&dev->slave_mutex);
+ return -EIO;
+ }
+
+ /* Also unlocks the slave_mutex */
+ res = vu_process_message_reply(dev, &vmsg, &payload);
+ if (!res) {
+ return -EIO;
+ }
+ /*
+ * Payload is delivered as uint64_t but is actually signed for
+ * errors.
+ */
+ return (int64_t)payload;
+}
diff --git a/subprojects/libvhost-user/libvhost-user.h b/subprojects/libvhost-user/libvhost-user.h
index 330b61c005..70fc61171f 100644
--- a/subprojects/libvhost-user/libvhost-user.h
+++ b/subprojects/libvhost-user/libvhost-user.h
@@ -122,6 +122,33 @@ typedef enum VhostUserSlaveRequest {
VHOST_USER_SLAVE_MAX
} VhostUserSlaveRequest;
+/* Structures carried over the slave channel back to QEMU */
+#define VHOST_USER_FS_SLAVE_MAX_ENTRIES 32
+
+/* For the flags field of VhostUserFSSlaveMsg */
+#define VHOST_USER_FS_FLAG_MAP_R (1u << 0)
+#define VHOST_USER_FS_FLAG_MAP_W (1u << 1)
+
+typedef struct {
+ /* Offsets within the file being mapped */
+ uint64_t fd_offset;
+ /* Offsets within the cache */
+ uint64_t c_offset;
+ /* Lengths of sections */
+ uint64_t len;
+ /* Flags, from VHOST_USER_FS_FLAG_* */
+ uint64_t flags;
+} VhostUserFSSlaveMsgEntry;
+
+typedef struct {
+ /* Number of entries */
+ uint16_t count;
+ /* Spare */
+ uint16_t align;
+
+ VhostUserFSSlaveMsgEntry entries[];
+} VhostUserFSSlaveMsg;
+
typedef struct VhostUserMemoryRegion {
uint64_t guest_phys_addr;
uint64_t memory_size;
@@ -197,6 +224,7 @@ typedef struct VhostUserMsg {
VhostUserConfig config;
VhostUserVringArea area;
VhostUserInflight inflight;
+ VhostUserFSSlaveMsg fs;
} payload;
int fds[VHOST_MEMORY_BASELINE_NREGIONS];
@@ -693,4 +721,16 @@ void vu_queue_get_avail_bytes(VuDev *vdev, VuVirtq *vq, unsigned int *in_bytes,
bool vu_queue_avail_bytes(VuDev *dev, VuVirtq *vq, unsigned int in_bytes,
unsigned int out_bytes);
+/**
+ * vu_fs_cache_request: Send a slave message for an fs client
+ * @dev: a VuDev context
+ * @req: The request type (map, unmap, sync)
+ * @fd: an fd (only required for map, else must be -1)
+ * @fsm: The body of the message
+ *
+ * Returns: 0 or above for success, nevative errno on error
+ */
+int64_t vu_fs_cache_request(VuDev *dev, VhostUserSlaveRequest req, int fd,
+ VhostUserFSSlaveMsg *fsm);
+
#endif /* LIBVHOST_USER_H */
--
2.31.1
next prev parent reply other threads:[~2021-04-28 11:10 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 ` Dr. David Alan Gilbert (git) [this message]
2021-04-29 15:48 ` [PATCH v3 06/26] DAX subprojects/libvhost-user: Add virtio-fs slave types 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 ` [PATCH v3 12/26] DAX: virtiofsd: Add setup/remove mappings fuse commands Dr. David Alan Gilbert (git)
2021-05-06 15:02 ` 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
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