[Qemu-devel] [PATCH 04/44] net: move dump backend code from net.c to net/dump.c

[Mark McLoughlin <markmc@redhat.com>]

Signed-off-by: Mark McLoughlin <markmc@redhat.com>
---
 Makefile   |    1 +
 net.c      |  127 +--------------------------------------------------
 net/dump.c |  151 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 net/dump.h |   33 +++++++++++++
 4 files changed, 186 insertions(+), 126 deletions(-)
 create mode 100644 net/dump.c
 create mode 100644 net/dump.h

diff --git a/Makefile b/Makefile
index fa1070d..6ed4bf8 100644
--- a/Makefile
+++ b/Makefile
@@ -101,6 +101,7 @@ block-obj-y +=  $(addprefix block/, $(block-nested-y))
 net-obj-y = net.o
 net-nested-y = queue.o checksum.o
 net-nested-y += socket.o
+net-nested-y += dump.o
 net-nested-$(CONFIG_POSIX) += tap.o
 net-nested-$(CONFIG_LINUX) += tap-linux.o
 net-nested-$(CONFIG_WIN32) += tap-win32.o
diff --git a/net.c b/net.c
index 3b3f3d6..5667485 100644
--- a/net.c
+++ b/net.c
@@ -93,6 +93,7 @@
 #include "net.h"
 #include "net/tap.h"
 #include "net/socket.h"
+#include "net/dump.h"
 #include "net/slirp.h"
 #include "net/vde.h"
 #include "monitor.h"
@@ -720,110 +721,6 @@ qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt)
     return qemu_sendv_packet_async(vc, iov, iovcnt, NULL);
 }
 
-typedef struct DumpState {
-    VLANClientState *pcap_vc;
-    int fd;
-    int pcap_caplen;
-} DumpState;
-
-#define PCAP_MAGIC 0xa1b2c3d4
-
-struct pcap_file_hdr {
-    uint32_t magic;
-    uint16_t version_major;
-    uint16_t version_minor;
-    int32_t thiszone;
-    uint32_t sigfigs;
-    uint32_t snaplen;
-    uint32_t linktype;
-};
-
-struct pcap_sf_pkthdr {
-    struct {
-        int32_t tv_sec;
-        int32_t tv_usec;
-    } ts;
-    uint32_t caplen;
-    uint32_t len;
-};
-
-static ssize_t dump_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
-{
-    DumpState *s = vc->opaque;
-    struct pcap_sf_pkthdr hdr;
-    int64_t ts;
-    int caplen;
-
-    /* Early return in case of previous error. */
-    if (s->fd < 0) {
-        return size;
-    }
-
-    ts = muldiv64(qemu_get_clock(vm_clock), 1000000, get_ticks_per_sec());
-    caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
-
-    hdr.ts.tv_sec = ts / 1000000;
-    hdr.ts.tv_usec = ts % 1000000;
-    hdr.caplen = caplen;
-    hdr.len = size;
-    if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
-        write(s->fd, buf, caplen) != caplen) {
-        qemu_log("-net dump write error - stop dump\n");
-        close(s->fd);
-        s->fd = -1;
-    }
-
-    return size;
-}
-
-static void net_dump_cleanup(VLANClientState *vc)
-{
-    DumpState *s = vc->opaque;
-
-    close(s->fd);
-    qemu_free(s);
-}
-
-static int net_dump_init(VLANState *vlan, const char *device,
-                         const char *name, const char *filename, int len)
-{
-    struct pcap_file_hdr hdr;
-    DumpState *s;
-
-    s = qemu_malloc(sizeof(DumpState));
-
-    s->fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
-    if (s->fd < 0) {
-        qemu_error("-net dump: can't open %s\n", filename);
-        return -1;
-    }
-
-    s->pcap_caplen = len;
-
-    hdr.magic = PCAP_MAGIC;
-    hdr.version_major = 2;
-    hdr.version_minor = 4;
-    hdr.thiszone = 0;
-    hdr.sigfigs = 0;
-    hdr.snaplen = s->pcap_caplen;
-    hdr.linktype = 1;
-
-    if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
-        qemu_error("-net dump write error: %s\n", strerror(errno));
-        close(s->fd);
-        qemu_free(s);
-        return -1;
-    }
-
-    s->pcap_vc = qemu_new_vlan_client(NET_CLIENT_TYPE_DUMP,
-                                      vlan, NULL, device, name, NULL,
-                                      dump_receive, NULL, NULL,
-                                      net_dump_cleanup, s);
-    snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
-             "dump to %s (len=%d)", filename, len);
-    return 0;
-}
-
 /* find or alloc a new VLAN */
 VLANState *qemu_find_vlan(int id, int allocate)
 {
@@ -1003,28 +900,6 @@ static int net_init_nic(QemuOpts *opts,
     return idx;
 }
 
-static int net_init_dump(QemuOpts *opts,
-                         Monitor *mon,
-                         const char *name,
-                         VLANState *vlan)
-{
-    int len;
-    const char *file;
-    char def_file[128];
-
-    assert(vlan);
-
-    file = qemu_opt_get(opts, "file");
-    if (!file) {
-        snprintf(def_file, sizeof(def_file), "qemu-vlan%d.pcap", vlan->id);
-        file = def_file;
-    }
-
-    len = qemu_opt_get_size(opts, "len", 65536);
-
-    return net_dump_init(vlan, "dump", name, file, len);
-}
-
 #define NET_COMMON_PARAMS_DESC                     \
     {                                              \
         .name = "type",                            \
diff --git a/net/dump.c b/net/dump.c
new file mode 100644
index 0000000..05a102b
--- /dev/null
+++ b/net/dump.c
@@ -0,0 +1,151 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "dump.h"
+#include "qemu-common.h"
+#include "sysemu.h"
+#include "qemu-log.h"
+
+typedef struct DumpState {
+    VLANClientState *pcap_vc;
+    int fd;
+    int pcap_caplen;
+} DumpState;
+
+#define PCAP_MAGIC 0xa1b2c3d4
+
+struct pcap_file_hdr {
+    uint32_t magic;
+    uint16_t version_major;
+    uint16_t version_minor;
+    int32_t thiszone;
+    uint32_t sigfigs;
+    uint32_t snaplen;
+    uint32_t linktype;
+};
+
+struct pcap_sf_pkthdr {
+    struct {
+        int32_t tv_sec;
+        int32_t tv_usec;
+    } ts;
+    uint32_t caplen;
+    uint32_t len;
+};
+
+static ssize_t dump_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
+{
+    DumpState *s = vc->opaque;
+    struct pcap_sf_pkthdr hdr;
+    int64_t ts;
+    int caplen;
+
+    /* Early return in case of previous error. */
+    if (s->fd < 0) {
+        return size;
+    }
+
+    ts = muldiv64(qemu_get_clock(vm_clock), 1000000, get_ticks_per_sec());
+    caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
+
+    hdr.ts.tv_sec = ts / 1000000;
+    hdr.ts.tv_usec = ts % 1000000;
+    hdr.caplen = caplen;
+    hdr.len = size;
+    if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
+        write(s->fd, buf, caplen) != caplen) {
+        qemu_log("-net dump write error - stop dump\n");
+        close(s->fd);
+        s->fd = -1;
+    }
+
+    return size;
+}
+
+static void net_dump_cleanup(VLANClientState *vc)
+{
+    DumpState *s = vc->opaque;
+
+    close(s->fd);
+    qemu_free(s);
+}
+
+static int net_dump_init(VLANState *vlan, const char *device,
+                         const char *name, const char *filename, int len)
+{
+    struct pcap_file_hdr hdr;
+    DumpState *s;
+
+    s = qemu_malloc(sizeof(DumpState));
+
+    s->fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
+    if (s->fd < 0) {
+        qemu_error("-net dump: can't open %s\n", filename);
+        return -1;
+    }
+
+    s->pcap_caplen = len;
+
+    hdr.magic = PCAP_MAGIC;
+    hdr.version_major = 2;
+    hdr.version_minor = 4;
+    hdr.thiszone = 0;
+    hdr.sigfigs = 0;
+    hdr.snaplen = s->pcap_caplen;
+    hdr.linktype = 1;
+
+    if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
+        qemu_error("-net dump write error: %s\n", strerror(errno));
+        close(s->fd);
+        qemu_free(s);
+        return -1;
+    }
+
+    s->pcap_vc = qemu_new_vlan_client(NET_CLIENT_TYPE_DUMP,
+                                      vlan, NULL, device, name, NULL,
+                                      dump_receive, NULL, NULL,
+                                      net_dump_cleanup, s);
+    snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
+             "dump to %s (len=%d)", filename, len);
+    return 0;
+}
+
+int net_init_dump(QemuOpts *opts, Monitor *mon, const char *name, VLANState *vlan)
+{
+    int len;
+    const char *file;
+    char def_file[128];
+
+    assert(vlan);
+
+    file = qemu_opt_get(opts, "file");
+    if (!file) {
+        snprintf(def_file, sizeof(def_file), "qemu-vlan%d.pcap", vlan->id);
+        file = def_file;
+    }
+
+    len = qemu_opt_get_size(opts, "len", 65536);
+
+    return net_dump_init(vlan, "dump", name, file, len);
+}
diff --git a/net/dump.h b/net/dump.h
new file mode 100644
index 0000000..fdc91ad
--- /dev/null
+++ b/net/dump.h
@@ -0,0 +1,33 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#ifndef QEMU_NET_DUMP_H
+#define QEMU_NET_DUMP_H
+
+#include "net.h"
+#include "qemu-common.h"
+
+int net_init_dump(QemuOpts *opts, Monitor *mon,
+                  const char *name, VLANState *vlan);
+
+#endif /* QEMU_NET_DUMP_H */
-- 
1.6.5.2