aboutsummaryrefslogtreecommitdiff
path: root/hw
diff options
context:
space:
mode:
Diffstat (limited to 'hw')
-rw-r--r--hw/9p.h26
-rw-r--r--hw/virtio-9p-debug.c484
-rw-r--r--hw/virtio-9p-local.c17
-rw-r--r--hw/virtio-9p.c307
-rw-r--r--hw/virtio-9p.h166
-rw-r--r--hw/virtio-pci.c32
-rw-r--r--hw/virtio.h7
7 files changed, 1039 insertions, 0 deletions
diff --git a/hw/9p.h b/hw/9p.h
new file mode 100644
index 0000000000..5fdd770ffc
--- /dev/null
+++ b/hw/9p.h
@@ -0,0 +1,26 @@
+/*
+ * Virtio 9p
+ *
+ * Copyright IBM, Corp. 2010
+ *
+ * Authors:
+ * Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef QEMU_9P_H
+#define QEMU_9P_H
+
+#include <stdbool.h>
+
+typedef struct V9fsConf
+{
+ /* tag name for the device */
+ char *tag;
+ char *fsdev_id;
+} V9fsConf;
+
+#endif
diff --git a/hw/virtio-9p-debug.c b/hw/virtio-9p-debug.c
new file mode 100644
index 0000000000..2fb2673d93
--- /dev/null
+++ b/hw/virtio-9p-debug.c
@@ -0,0 +1,484 @@
+/*
+ * Virtio 9p PDU debug
+ *
+ * Copyright IBM, Corp. 2010
+ *
+ * Authors:
+ * Anthony Liguori <aliguori@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ */
+#include "virtio.h"
+#include "pc.h"
+#include "virtio-9p.h"
+#include "virtio-9p-debug.h"
+
+#define BUG_ON(cond) assert(!(cond))
+
+static FILE *llogfile;
+
+static struct iovec *get_sg(V9fsPDU *pdu, int rx)
+{
+ if (rx) {
+ return pdu->elem.in_sg;
+ }
+ return pdu->elem.out_sg;
+}
+
+static int get_sg_count(V9fsPDU *pdu, int rx)
+{
+ if (rx) {
+ return pdu->elem.in_num;
+ }
+ return pdu->elem.out_num;
+
+}
+
+static void pprint_int8(V9fsPDU *pdu, int rx, size_t *offsetp,
+ const char *name)
+{
+ size_t copied;
+ int count = get_sg_count(pdu, rx);
+ size_t offset = *offsetp;
+ struct iovec *sg = get_sg(pdu, rx);
+ int8_t value;
+
+ copied = do_pdu_unpack(&value, sg, count, offset, sizeof(value));
+
+ BUG_ON(copied != sizeof(value));
+ offset += sizeof(value);
+ fprintf(llogfile, "%s=0x%x", name, value);
+ *offsetp = offset;
+}
+
+static void pprint_int16(V9fsPDU *pdu, int rx, size_t *offsetp,
+ const char *name)
+{
+ size_t copied;
+ int count = get_sg_count(pdu, rx);
+ struct iovec *sg = get_sg(pdu, rx);
+ size_t offset = *offsetp;
+ int16_t value;
+
+
+ copied = do_pdu_unpack(&value, sg, count, offset, sizeof(value));
+
+ BUG_ON(copied != sizeof(value));
+ offset += sizeof(value);
+ fprintf(llogfile, "%s=0x%x", name, value);
+ *offsetp = offset;
+}
+
+static void pprint_int32(V9fsPDU *pdu, int rx, size_t *offsetp,
+ const char *name)
+{
+ size_t copied;
+ int count = get_sg_count(pdu, rx);
+ struct iovec *sg = get_sg(pdu, rx);
+ size_t offset = *offsetp;
+ int32_t value;
+
+
+ copied = do_pdu_unpack(&value, sg, count, offset, sizeof(value));
+
+ BUG_ON(copied != sizeof(value));
+ offset += sizeof(value);
+ fprintf(llogfile, "%s=0x%x", name, value);
+ *offsetp = offset;
+}
+
+static void pprint_int64(V9fsPDU *pdu, int rx, size_t *offsetp,
+ const char *name)
+{
+ size_t copied;
+ int count = get_sg_count(pdu, rx);
+ struct iovec *sg = get_sg(pdu, rx);
+ size_t offset = *offsetp;
+ int64_t value;
+
+
+ copied = do_pdu_unpack(&value, sg, count, offset, sizeof(value));
+
+ BUG_ON(copied != sizeof(value));
+ offset += sizeof(value);
+ fprintf(llogfile, "%s=0x%" PRIx64, name, value);
+ *offsetp = offset;
+}
+
+static void pprint_str(V9fsPDU *pdu, int rx, size_t *offsetp, const char *name)
+{
+ int sg_count = get_sg_count(pdu, rx);
+ struct iovec *sg = get_sg(pdu, rx);
+ size_t offset = *offsetp;
+ uint16_t tmp_size, size;
+ size_t result;
+ size_t copied = 0;
+ int i = 0;
+
+ /* get the size */
+ copied = do_pdu_unpack(&tmp_size, sg, sg_count, offset, sizeof(tmp_size));
+ BUG_ON(copied != sizeof(tmp_size));
+ size = le16_to_cpupu(&tmp_size);
+ offset += copied;
+
+ fprintf(llogfile, "%s=", name);
+ for (i = 0; size && i < sg_count; i++) {
+ size_t len;
+ if (offset >= sg[i].iov_len) {
+ /* skip this sg */
+ offset -= sg[i].iov_len;
+ continue;
+ } else {
+ len = MIN(sg[i].iov_len - offset, size);
+ result = fwrite(sg[i].iov_base + offset, 1, len, llogfile);
+ BUG_ON(result != len);
+ size -= len;
+ copied += len;
+ if (size) {
+ offset = 0;
+ continue;
+ }
+ }
+ }
+ *offsetp += copied;
+}
+
+static void pprint_qid(V9fsPDU *pdu, int rx, size_t *offsetp, const char *name)
+{
+ fprintf(llogfile, "%s={", name);
+ pprint_int8(pdu, rx, offsetp, "type");
+ pprint_int32(pdu, rx, offsetp, ", version");
+ pprint_int64(pdu, rx, offsetp, ", path");
+ fprintf(llogfile, "}");
+}
+
+static void pprint_stat(V9fsPDU *pdu, int rx, size_t *offsetp, const char *name)
+{
+ fprintf(llogfile, "%s={", name);
+ pprint_int16(pdu, rx, offsetp, "size");
+ pprint_int16(pdu, rx, offsetp, ", type");
+ pprint_int32(pdu, rx, offsetp, ", dev");
+ pprint_qid(pdu, rx, offsetp, ", qid");
+ pprint_int32(pdu, rx, offsetp, ", mode");
+ pprint_int32(pdu, rx, offsetp, ", atime");
+ pprint_int32(pdu, rx, offsetp, ", mtime");
+ pprint_int64(pdu, rx, offsetp, ", length");
+ pprint_str(pdu, rx, offsetp, ", name");
+ pprint_str(pdu, rx, offsetp, ", uid");
+ pprint_str(pdu, rx, offsetp, ", gid");
+ pprint_str(pdu, rx, offsetp, ", muid");
+ if (dotu) {
+ pprint_str(pdu, rx, offsetp, ", extension");
+ pprint_int32(pdu, rx, offsetp, ", uid");
+ pprint_int32(pdu, rx, offsetp, ", gid");
+ pprint_int32(pdu, rx, offsetp, ", muid");
+ }
+ fprintf(llogfile, "}");
+}
+
+static void pprint_strs(V9fsPDU *pdu, int rx, size_t *offsetp, const char *name)
+{
+ int sg_count = get_sg_count(pdu, rx);
+ struct iovec *sg = get_sg(pdu, rx);
+ size_t offset = *offsetp;
+ uint16_t tmp_count, count, i;
+ size_t copied = 0;
+
+ fprintf(llogfile, "%s={", name);
+
+ /* Get the count */
+ copied = do_pdu_unpack(&tmp_count, sg, sg_count, offset, sizeof(tmp_count));
+ BUG_ON(copied != sizeof(tmp_count));
+ count = le16_to_cpupu(&tmp_count);
+ offset += copied;
+
+ for (i = 0; i < count; i++) {
+ char str[512];
+ if (i) {
+ fprintf(llogfile, ", ");
+ }
+ snprintf(str, sizeof(str), "[%d]", i);
+ pprint_str(pdu, rx, &offset, str);
+ }
+
+ fprintf(llogfile, "}");
+
+ *offsetp = offset;
+}
+
+static void pprint_qids(V9fsPDU *pdu, int rx, size_t *offsetp, const char *name)
+{
+ int sg_count = get_sg_count(pdu, rx);
+ struct iovec *sg = get_sg(pdu, rx);
+ size_t offset = *offsetp;
+ uint16_t tmp_count, count, i;
+ size_t copied = 0;
+
+ fprintf(llogfile, "%s={", name);
+
+ copied = do_pdu_unpack(&tmp_count, sg, sg_count, offset, sizeof(tmp_count));
+ BUG_ON(copied != sizeof(tmp_count));
+ count = le16_to_cpupu(&tmp_count);
+ offset += copied;
+
+ for (i = 0; i < count; i++) {
+ char str[512];
+ if (i) {
+ fprintf(llogfile, ", ");
+ }
+ snprintf(str, sizeof(str), "[%d]", i);
+ pprint_qid(pdu, rx, &offset, str);
+ }
+
+ fprintf(llogfile, "}");
+
+ *offsetp = offset;
+}
+
+static void pprint_sg(V9fsPDU *pdu, int rx, size_t *offsetp, const char *name)
+{
+ struct iovec *sg = get_sg(pdu, rx);
+ unsigned int count;
+ int i;
+
+ if (rx) {
+ count = pdu->elem.in_num;
+ } else {
+ count = pdu->elem.out_num;
+ }
+
+ fprintf(llogfile, "%s={", name);
+ for (i = 0; i < count; i++) {
+ if (i) {
+ fprintf(llogfile, ", ");
+ }
+ fprintf(llogfile, "(%p, 0x%zx)", sg[i].iov_base, sg[i].iov_len);
+ }
+ fprintf(llogfile, "}");
+}
+
+/* FIXME: read from a directory fid returns serialized stat_t's */
+#ifdef DEBUG_DATA
+static void pprint_data(V9fsPDU *pdu, int rx, size_t *offsetp, const char *name)
+{
+ struct iovec *sg = get_sg(pdu, rx);
+ size_t offset = *offsetp;
+ unsigned int count;
+ int32_t size;
+ int total, i, j;
+ ssize_t len;
+
+ if (rx) {
+ count = pdu->elem.in_num;
+ } else
+ count = pdu->elem.out_num;
+ }
+
+ BUG_ON((offset + sizeof(size)) > sg[0].iov_len);
+
+ memcpy(&size, sg[0].iov_base + offset, sizeof(size));
+ offset += sizeof(size);
+
+ fprintf(llogfile, "size: %x\n", size);
+
+ sg[0].iov_base += 11; /* skip header */
+ sg[0].iov_len -= 11;
+
+ total = 0;
+ for (i = 0; i < count; i++) {
+ total += sg[i].iov_len;
+ if (total >= size) {
+ /* trim sg list so writev does the right thing */
+ sg[i].iov_len -= (total - size);
+ i++;
+ break;
+ }
+ }
+
+ fprintf(llogfile, "%s={\"", name);
+ fflush(llogfile);
+ for (j = 0; j < i; j++) {
+ if (j) {
+ fprintf(llogfile, "\", \"");
+ fflush(llogfile);
+ }
+
+ do {
+ len = writev(fileno(llogfile), &sg[j], 1);
+ } while (len == -1 && errno == EINTR);
+ fprintf(llogfile, "len == %ld: %m\n", len);
+ BUG_ON(len != sg[j].iov_len);
+ }
+ fprintf(llogfile, "\"}");
+
+ sg[0].iov_base -= 11;
+ sg[0].iov_len += 11;
+
+}
+#endif
+
+void pprint_pdu(V9fsPDU *pdu)
+{
+ size_t offset = 7;
+
+ if (llogfile == NULL) {
+ llogfile = fopen("/tmp/pdu.log", "w");
+ }
+
+ switch (pdu->id) {
+ case P9_TVERSION:
+ fprintf(llogfile, "TVERSION: (");
+ pprint_int32(pdu, 0, &offset, "msize");
+ pprint_str(pdu, 0, &offset, ", version");
+ break;
+ case P9_RVERSION:
+ fprintf(llogfile, "RVERSION: (");
+ pprint_int32(pdu, 1, &offset, "msize");
+ pprint_str(pdu, 1, &offset, ", version");
+ break;
+ case P9_TAUTH:
+ fprintf(llogfile, "TAUTH: (");
+ pprint_int32(pdu, 0, &offset, "afid");
+ pprint_str(pdu, 0, &offset, ", uname");
+ pprint_str(pdu, 0, &offset, ", aname");
+ if (dotu) {
+ pprint_int32(pdu, 0, &offset, ", n_uname");
+ }
+ break;
+ case P9_RAUTH:
+ fprintf(llogfile, "RAUTH: (");
+ pprint_qid(pdu, 1, &offset, "qid");
+ break;
+ case P9_TATTACH:
+ fprintf(llogfile, "TATTACH: (");
+ pprint_int32(pdu, 0, &offset, "fid");
+ pprint_int32(pdu, 0, &offset, ", afid");
+ pprint_str(pdu, 0, &offset, ", uname");
+ pprint_str(pdu, 0, &offset, ", aname");
+ if (dotu) {
+ pprint_int32(pdu, 0, &offset, ", n_uname");
+ }
+ break;
+ case P9_RATTACH:
+ fprintf(llogfile, "RATTACH: (");
+ pprint_qid(pdu, 1, &offset, "qid");
+ break;
+ case P9_TERROR:
+ fprintf(llogfile, "TERROR: (");
+ break;
+ case P9_RERROR:
+ fprintf(llogfile, "RERROR: (");
+ pprint_str(pdu, 1, &offset, "ename");
+ if (dotu) {
+ pprint_int32(pdu, 1, &offset, ", ecode");
+ }
+ break;
+ case P9_TFLUSH:
+ fprintf(llogfile, "TFLUSH: (");
+ pprint_int16(pdu, 0, &offset, "oldtag");
+ break;
+ case P9_RFLUSH:
+ fprintf(llogfile, "RFLUSH: (");
+ break;
+ case P9_TWALK:
+ fprintf(llogfile, "TWALK: (");
+ pprint_int32(pdu, 0, &offset, "fid");
+ pprint_int32(pdu, 0, &offset, ", newfid");
+ pprint_strs(pdu, 0, &offset, ", wnames");
+ break;
+ case P9_RWALK:
+ fprintf(llogfile, "RWALK: (");
+ pprint_qids(pdu, 1, &offset, "wqids");
+ break;
+ case P9_TOPEN:
+ fprintf(llogfile, "TOPEN: (");
+ pprint_int32(pdu, 0, &offset, "fid");
+ pprint_int8(pdu, 0, &offset, ", mode");
+ break;
+ case P9_ROPEN:
+ fprintf(llogfile, "ROPEN: (");
+ pprint_qid(pdu, 1, &offset, "qid");
+ pprint_int32(pdu, 1, &offset, ", iounit");
+ break;
+ case P9_TCREATE:
+ fprintf(llogfile, "TCREATE: (");
+ pprint_int32(pdu, 0, &offset, "fid");
+ pprint_str(pdu, 0, &offset, ", name");
+ pprint_int32(pdu, 0, &offset, ", perm");
+ pprint_int8(pdu, 0, &offset, ", mode");
+ if (dotu) {
+ pprint_str(pdu, 0, &offset, ", extension");
+ }
+ break;
+ case P9_RCREATE:
+ fprintf(llogfile, "RCREATE: (");
+ pprint_qid(pdu, 1, &offset, "qid");
+ pprint_int32(pdu, 1, &offset, ", iounit");
+ break;
+ case P9_TREAD:
+ fprintf(llogfile, "TREAD: (");
+ pprint_int32(pdu, 0, &offset, "fid");
+ pprint_int64(pdu, 0, &offset, ", offset");
+ pprint_int32(pdu, 0, &offset, ", count");
+ pprint_sg(pdu, 0, &offset, ", sg");
+ break;
+ case P9_RREAD:
+ fprintf(llogfile, "RREAD: (");
+ pprint_int32(pdu, 1, &offset, "count");
+ pprint_sg(pdu, 1, &offset, ", sg");
+ offset = 7;
+#ifdef DEBUG_DATA
+ pprint_data(pdu, 1, &offset, ", data");
+#endif
+ break;
+ case P9_TWRITE:
+ fprintf(llogfile, "TWRITE: (");
+ pprint_int32(pdu, 0, &offset, "fid");
+ pprint_int64(pdu, 0, &offset, ", offset");
+ pprint_int32(pdu, 0, &offset, ", count");
+ break;
+ case P9_RWRITE:
+ fprintf(llogfile, "RWRITE: (");
+ pprint_int32(pdu, 1, &offset, "count");
+ break;
+ case P9_TCLUNK:
+ fprintf(llogfile, "TCLUNK: (");
+ pprint_int32(pdu, 0, &offset, "fid");
+ break;
+ case P9_RCLUNK:
+ fprintf(llogfile, "RCLUNK: (");
+ break;
+ case P9_TREMOVE:
+ fprintf(llogfile, "TREMOVE: (");
+ pprint_int32(pdu, 0, &offset, "fid");
+ break;
+ case P9_RREMOVE:
+ fprintf(llogfile, "RREMOVE: (");
+ break;
+ case P9_TSTAT:
+ fprintf(llogfile, "TSTAT: (");
+ pprint_int32(pdu, 0, &offset, "fid");
+ break;
+ case P9_RSTAT:
+ fprintf(llogfile, "RSTAT: (");
+ offset += 2; /* ignored */
+ pprint_stat(pdu, 1, &offset, "stat");
+ break;
+ case P9_TWSTAT:
+ fprintf(llogfile, "TWSTAT: (");
+ pprint_int32(pdu, 0, &offset, "fid");
+ offset += 2; /* ignored */
+ pprint_stat(pdu, 0, &offset, ", stat");
+ break;
+ case P9_RWSTAT:
+ fprintf(llogfile, "RWSTAT: (");
+ break;
+ default:
+ fprintf(llogfile, "unknown(%d): (", pdu->id);
+ break;
+ }
+
+ fprintf(llogfile, ")\n");
+}
diff --git a/hw/virtio-9p-local.c b/hw/virtio-9p-local.c
new file mode 100644
index 0000000000..379af60eed
--- /dev/null
+++ b/hw/virtio-9p-local.c
@@ -0,0 +1,17 @@
+/*
+ * Virtio 9p Posix callback
+ *
+ * Copyright IBM, Corp. 2010
+ *
+ * Authors:
+ * Anthony Liguori <aliguori@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ */
+#include "virtio.h"
+#include "virtio-9p.h"
+
+FileOperations local_ops = {
+};
diff --git a/hw/virtio-9p.c b/hw/virtio-9p.c
new file mode 100644
index 0000000000..abd01c16b6
--- /dev/null
+++ b/hw/virtio-9p.c
@@ -0,0 +1,307 @@
+/*
+ * Virtio 9p backend
+ *
+ * Copyright IBM, Corp. 2010
+ *
+ * Authors:
+ * Anthony Liguori <aliguori@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#include "virtio.h"
+#include "pc.h"
+#include "qemu_socket.h"
+#include "virtio-9p.h"
+#include "fsdev/qemu-fsdev.h"
+#include "virtio-9p-debug.h"
+
+int dotu = 1;
+int debug_9p_pdu;
+
+static V9fsPDU *alloc_pdu(V9fsState *s)
+{
+ V9fsPDU *pdu = NULL;
+
+ if (!QLIST_EMPTY(&s->free_list)) {
+ pdu = QLIST_FIRST(&s->free_list);
+ QLIST_REMOVE(pdu, next);
+ }
+ return pdu;
+}
+
+static void free_pdu(V9fsState *s, V9fsPDU *pdu)
+{
+ if (pdu) {
+ QLIST_INSERT_HEAD(&s->free_list, pdu, next);
+ }
+}
+
+size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count,
+ size_t offset, size_t size, int pack)
+{
+ int i = 0;
+ size_t copied = 0;
+
+ for (i = 0; size && i < sg_count; i++) {
+ size_t len;
+ if (offset >= sg[i].iov_len) {
+ /* skip this sg */
+ offset -= sg[i].iov_len;
+ continue;
+ } else {
+ len = MIN(sg[i].iov_len - offset, size);
+ if (pack) {
+ memcpy(sg[i].iov_base + offset, addr, len);
+ } else {
+ memcpy(addr, sg[i].iov_base + offset, len);
+ }
+ size -= len;
+ copied += len;
+ addr += len;
+ if (size) {
+ offset = 0;
+ continue;
+ }
+ }
+ }
+
+ return copied;
+}
+
+static void v9fs_version(V9fsState *s, V9fsPDU *pdu)
+{
+ if (debug_9p_pdu) {
+ pprint_pdu(pdu);
+ }
+}
+
+static void v9fs_attach(V9fsState *s, V9fsPDU *pdu)
+{
+ if (debug_9p_pdu) {
+ pprint_pdu(pdu);
+ }
+}
+
+static void v9fs_stat(V9fsState *s, V9fsPDU *pdu)
+{
+ if (debug_9p_pdu) {
+ pprint_pdu(pdu);
+ }
+}
+
+static void v9fs_walk(V9fsState *s, V9fsPDU *pdu)
+{
+ if (debug_9p_pdu) {
+ pprint_pdu(pdu);
+ }
+}
+
+static void v9fs_clunk(V9fsState *s, V9fsPDU *pdu)
+{
+ if (debug_9p_pdu) {
+ pprint_pdu(pdu);
+ }
+}
+
+static void v9fs_open(V9fsState *s, V9fsPDU *pdu)
+{ if (debug_9p_pdu) {
+ pprint_pdu(pdu);
+ }
+}
+
+static void v9fs_read(V9fsState *s, V9fsPDU *pdu)
+{
+ if (debug_9p_pdu) {
+ pprint_pdu(pdu);
+ }
+}
+
+static void v9fs_write(V9fsState *s, V9fsPDU *pdu)
+{
+ if (debug_9p_pdu) {
+ pprint_pdu(pdu);
+ }
+}
+
+static void v9fs_create(V9fsState *s, V9fsPDU *pdu)
+{
+ if (debug_9p_pdu) {
+ pprint_pdu(pdu);
+ }
+}
+
+static void v9fs_flush(V9fsState *s, V9fsPDU *pdu)
+{
+ if (debug_9p_pdu) {
+ pprint_pdu(pdu);
+ }
+}
+
+static void v9fs_remove(V9fsState *s, V9fsPDU *pdu)
+{
+ if (debug_9p_pdu) {
+ pprint_pdu(pdu);
+ }
+}
+
+static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu)
+{
+ if (debug_9p_pdu) {
+ pprint_pdu(pdu);
+ }
+}
+
+typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu);
+
+static pdu_handler_t *pdu_handlers[] = {
+ [P9_TVERSION] = v9fs_version,
+ [P9_TATTACH] = v9fs_attach,
+ [P9_TSTAT] = v9fs_stat,
+ [P9_TWALK] = v9fs_walk,
+ [P9_TCLUNK] = v9fs_clunk,
+ [P9_TOPEN] = v9fs_open,
+ [P9_TREAD] = v9fs_read,
+#if 0
+ [P9_TAUTH] = v9fs_auth,
+#endif
+ [P9_TFLUSH] = v9fs_flush,
+ [P9_TCREATE] = v9fs_create,
+ [P9_TWRITE] = v9fs_write,
+ [P9_TWSTAT] = v9fs_wstat,
+ [P9_TREMOVE] = v9fs_remove,
+};
+
+static void submit_pdu(V9fsState *s, V9fsPDU *pdu)
+{
+ pdu_handler_t *handler;
+
+ if (debug_9p_pdu) {
+ pprint_pdu(pdu);
+ }
+
+ BUG_ON(pdu->id >= ARRAY_SIZE(pdu_handlers));
+
+ handler = pdu_handlers[pdu->id];
+ BUG_ON(handler == NULL);
+
+ handler(s, pdu);
+}
+
+static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq)
+{
+ V9fsState *s = (V9fsState *)vdev;
+ V9fsPDU *pdu;
+ ssize_t len;
+
+ while ((pdu = alloc_pdu(s)) &&
+ (len = virtqueue_pop(vq, &pdu->elem)) != 0) {
+ uint8_t *ptr;
+
+ BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0);
+ BUG_ON(pdu->elem.out_sg[0].iov_len < 7);
+
+ ptr = pdu->elem.out_sg[0].iov_base;
+
+ memcpy(&pdu->size, ptr, 4);
+ pdu->id = ptr[4];
+ memcpy(&pdu->tag, ptr + 5, 2);
+
+ submit_pdu(s, pdu);
+ }
+
+ free_pdu(s, pdu);
+}
+
+static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features)
+{
+ features |= 1 << VIRTIO_9P_MOUNT_TAG;
+ return features;
+}
+
+static V9fsState *to_virtio_9p(VirtIODevice *vdev)
+{
+ return (V9fsState *)vdev;
+}
+
+static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config)
+{
+ struct virtio_9p_config *cfg;
+ V9fsState *s = to_virtio_9p(vdev);
+
+ cfg = qemu_mallocz(sizeof(struct virtio_9p_config) +
+ s->tag_len);
+ stw_raw(&cfg->tag_len, s->tag_len);
+ memcpy(cfg->tag, s->tag, s->tag_len);
+ memcpy(config, cfg, s->config_size);
+ qemu_free(cfg);
+}
+
+VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf)
+ {
+ V9fsState *s;
+ int i, len;
+ struct stat stat;
+ FsTypeEntry *fse;
+
+
+ s = (V9fsState *)virtio_common_init("virtio-9p",
+ VIRTIO_ID_9P,
+ sizeof(struct virtio_9p_config)+
+ MAX_TAG_LEN,
+ sizeof(V9fsState));
+
+ /* initialize pdu allocator */
+ QLIST_INIT(&s->free_list);
+ for (i = 0; i < (MAX_REQ - 1); i++) {
+ QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next);
+ }
+
+ s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output);
+
+ fse = get_fsdev_fsentry(conf->fsdev_id);
+
+ if (!fse) {
+ /* We don't have a fsdev identified by fsdev_id */
+ fprintf(stderr, "Virtio-9p device couldn't find fsdev "
+ "with the id %s\n", conf->fsdev_id);
+ exit(1);
+ }
+
+ if (!fse->path || !conf->tag) {
+ /* we haven't specified a mount_tag or the path */
+ fprintf(stderr, "fsdev with id %s needs path "
+ "and Virtio-9p device needs mount_tag arguments\n",
+ conf->fsdev_id);
+ exit(1);
+ }
+
+ if (lstat(fse->path, &stat)) {
+ fprintf(stderr, "share path %s does not exist\n", fse->path);
+ exit(1);
+ } else if (!S_ISDIR(stat.st_mode)) {
+ fprintf(stderr, "share path %s is not a directory \n", fse->path);
+ exit(1);
+ }
+
+ s->ctx.fs_root = qemu_strdup(fse->path);
+ len = strlen(conf->tag);
+ if (len > MAX_TAG_LEN) {
+ len = MAX_TAG_LEN;
+ }
+ /* s->tag is non-NULL terminated string */
+ s->tag = qemu_malloc(len);
+ memcpy(s->tag, conf->tag, len);
+ s->tag_len = len;
+ s->ctx.uid = -1;
+
+ s->ops = fse->ops;
+ s->vdev.get_features = virtio_9p_get_features;
+ s->config_size = sizeof(struct virtio_9p_config) +
+ s->tag_len;
+ s->vdev.get_config = virtio_9p_get_config;
+
+ return &s->vdev;
+}
diff --git a/hw/virtio-9p.h b/hw/virtio-9p.h
new file mode 100644
index 0000000000..b95dbe48af
--- /dev/null
+++ b/hw/virtio-9p.h
@@ -0,0 +1,166 @@
+#ifndef _QEMU_VIRTIO_9P_H
+#define _QEMU_VIRTIO_9P_H
+
+#include <sys/types.h>
+#include <dirent.h>
+#include <sys/time.h>
+#include <utime.h>
+
+#include "file-op-9p.h"
+
+/* The feature bitmap for virtio 9P */
+/* The mount point is specified in a config variable */
+#define VIRTIO_9P_MOUNT_TAG 0
+
+enum {
+ P9_TVERSION = 100,
+ P9_RVERSION,
+ P9_TAUTH = 102,
+ P9_RAUTH,
+ P9_TATTACH = 104,
+ P9_RATTACH,
+ P9_TERROR = 106,
+ P9_RERROR,
+ P9_TFLUSH = 108,
+ P9_RFLUSH,
+ P9_TWALK = 110,
+ P9_RWALK,
+ P9_TOPEN = 112,
+ P9_ROPEN,
+ P9_TCREATE = 114,
+ P9_RCREATE,
+ P9_TREAD = 116,
+ P9_RREAD,
+ P9_TWRITE = 118,
+ P9_RWRITE,
+ P9_TCLUNK = 120,
+ P9_RCLUNK,
+ P9_TREMOVE = 122,
+ P9_RREMOVE,
+ P9_TSTAT = 124,
+ P9_RSTAT,
+ P9_TWSTAT = 126,
+ P9_RWSTAT,
+};
+
+
+/* qid.types */
+enum {
+ P9_QTDIR = 0x80,
+ P9_QTAPPEND = 0x40,
+ P9_QTEXCL = 0x20,
+ P9_QTMOUNT = 0x10,
+ P9_QTAUTH = 0x08,
+ P9_QTTMP = 0x04,
+ P9_QTSYMLINK = 0x02,
+ P9_QTLINK = 0x01,
+ P9_QTFILE = 0x00,
+};
+
+#define P9_NOTAG (u16)(~0)
+#define P9_NOFID (u32)(~0)
+#define P9_MAXWELEM 16
+
+typedef struct V9fsPDU V9fsPDU;
+
+struct V9fsPDU
+{
+ uint32_t size;
+ uint16_t tag;
+ uint8_t id;
+ VirtQueueElement elem;
+ QLIST_ENTRY(V9fsPDU) next;
+};
+
+
+/* FIXME
+ * 1) change user needs to set groups and stuff
+ */
+
+/* from Linux's linux/virtio_9p.h */
+
+/* The ID for virtio console */
+#define VIRTIO_ID_9P 9
+#define MAX_REQ 128
+#define MAX_TAG_LEN 32
+
+#define BUG_ON(cond) assert(!(cond))
+
+typedef struct V9fsFidState V9fsFidState;
+
+typedef struct V9fsString
+{
+ int16_t size;
+ char *data;
+} V9fsString;
+
+typedef struct V9fsQID
+{
+ int8_t type;
+ int32_t version;
+ int64_t path;
+} V9fsQID;
+
+typedef struct V9fsStat
+{
+ int16_t size;
+ int16_t type;
+ int32_t dev;
+ V9fsQID qid;
+ int32_t mode;
+ int32_t atime;
+ int32_t mtime;
+ int64_t length;
+ V9fsString name;
+ V9fsString uid;
+ V9fsString gid;
+ V9fsString muid;
+ /* 9p2000.u */
+ V9fsString extension;
+ int32_t n_uid;
+ int32_t n_gid;
+ int32_t n_muid;
+} V9fsStat;
+
+struct V9fsFidState
+{
+ int32_t fid;
+ V9fsString path;
+ int fd;
+ DIR *dir;
+ uid_t uid;
+ V9fsFidState *next;
+};
+
+typedef struct V9fsState
+{
+ VirtIODevice vdev;
+ VirtQueue *vq;
+ V9fsPDU pdus[MAX_REQ];
+ QLIST_HEAD(, V9fsPDU) free_list;
+ V9fsFidState *fid_list;
+ FileOperations *ops;
+ FsContext ctx;
+ uint16_t tag_len;
+ uint8_t *tag;
+ size_t config_size;
+} V9fsState;
+
+struct virtio_9p_config
+{
+ /* number of characters in tag */
+ uint16_t tag_len;
+ /* Variable size tag name */
+ uint8_t tag[0];
+} __attribute__((packed));
+
+extern size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count,
+ size_t offset, size_t size, int pack);
+
+static inline size_t do_pdu_unpack(void *dst, struct iovec *sg, int sg_count,
+ size_t offset, size_t size)
+{
+ return pdu_packunpack(dst, sg, sg_count, offset, size, 0);
+}
+
+#endif
diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c
index 7ce526f42c..7ddf612282 100644
--- a/hw/virtio-pci.c
+++ b/hw/virtio-pci.c
@@ -102,6 +102,9 @@ typedef struct {
BlockConf block;
NICConf nic;
uint32_t host_features;
+#ifdef CONFIG_LINUX
+ V9fsConf fsconf;
+#endif
/* Max. number of ports we can have for a the virtio-serial device */
uint32_t max_virtserial_ports;
} VirtIOPCIProxy;
@@ -639,6 +642,23 @@ static int virtio_balloon_init_pci(PCIDevice *pci_dev)
return 0;
}
+#ifdef CONFIG_LINUX
+static int virtio_9p_init_pci(PCIDevice *pci_dev)
+{
+ VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
+ VirtIODevice *vdev;
+
+ vdev = virtio_9p_init(&pci_dev->qdev, &proxy->fsconf);
+ virtio_init_pci(proxy, vdev,
+ PCI_VENDOR_ID_REDHAT_QUMRANET,
+ 0x1009,
+ 0x2,
+ 0x00);
+
+ return 0;
+}
+#endif
+
static PCIDeviceInfo virtio_info[] = {
{
.qdev.name = "virtio-blk-pci",
@@ -693,6 +713,18 @@ static PCIDeviceInfo virtio_info[] = {
},
.qdev.reset = virtio_pci_reset,
},{
+#ifdef CONFIG_LINUX
+ .qdev.name = "virtio-9p-pci",
+ .qdev.size = sizeof(VirtIOPCIProxy),
+ .init = virtio_9p_init_pci,
+ .qdev.props = (Property[]) {
+ DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
+ DEFINE_PROP_STRING("mount_tag", VirtIOPCIProxy, fsconf.tag),
+ DEFINE_PROP_STRING("fsdev", VirtIOPCIProxy, fsconf.fsdev_id),
+ DEFINE_PROP_END_OF_LIST(),
+ },
+ }, {
+#endif
/* end of list */
}
};
diff --git a/hw/virtio.h b/hw/virtio.h
index f885f1b599..e4306cd750 100644
--- a/hw/virtio.h
+++ b/hw/virtio.h
@@ -20,6 +20,9 @@
#include "sysemu.h"
#include "block_int.h"
#include "event_notifier.h"
+#ifdef CONFIG_LINUX
+#include "9p.h"
+#endif
/* from Linux's linux/virtio_config.h */
@@ -185,6 +188,10 @@ VirtIODevice *virtio_blk_init(DeviceState *dev, BlockConf *conf);
VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf);
VirtIODevice *virtio_serial_init(DeviceState *dev, uint32_t max_nr_ports);
VirtIODevice *virtio_balloon_init(DeviceState *dev);
+#ifdef CONFIG_LINUX
+VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf);
+#endif
+
void virtio_net_exit(VirtIODevice *vdev);
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-23 19:52:27 +0000