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From: Slavomir Kaslev <kaslevs@vmware.com>
To: rostedt@goodmis.org
Cc: linux-trace-devel@vger.kernel.org
Subject: [PATCH v15 13/13] trace-cmd: Add support for tracing VMware Workstation VMs by name
Date: Tue,  8 Oct 2019 11:15:37 +0300
Message-ID: <20191008081537.11536-14-kaslevs@vmware.com> (raw)
In-Reply-To: <20191008081537.11536-1-kaslevs@vmware.com>

Read display name and CID of running VMware Workstation guests on startup so
that users can refer to them by name when recording.

Signed-off-by: Slavomir Kaslev <kaslevs@vmware.com>
---
 tracecmd/trace-record.c | 72 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)

diff --git a/tracecmd/trace-record.c b/tracecmd/trace-record.c
index cd16243..8533b13 100644
--- a/tracecmd/trace-record.c
+++ b/tracecmd/trace-record.c
@@ -3092,6 +3092,77 @@ next:
 	closedir(dir);
 }
 
+static int load_vmw_guest(const char *vm, char **name, int *cid)
+{
+	size_t line_len = 0;
+	char *line = NULL;
+	char *p;
+	FILE *f;
+
+	f = fopen(vm, "r");
+	if (!f)
+		return -errno;
+
+	*cid = -1;
+	*name = NULL;
+	while (getline(&line, &line_len, f) != -1) {
+		if (strncmp(line, "displayName = ", 14) == 0) {
+			p = strrchr(line, '"');
+			if (p)
+				*p = '\0';
+			*name = strdup(line + 15);
+			if (!*name)
+				die("allocating guest name");
+		} else if (strncmp(line, "vmci0.id = ", 11) == 0) {
+			p = strrchr(line, '"');
+			if (p)
+				*p = '\0';
+			*cid = atoi(line + 12);
+		}
+	}
+
+	free(line);
+	fclose(f);
+	return 0;
+}
+
+static void read_vmw_guests(void)
+{
+	static bool initialized;
+	size_t line_len = 0;
+	char *line = NULL;
+	ssize_t ret;
+	FILE *f;
+
+	if (initialized)
+		return;
+
+	initialized = true;
+
+	f = popen("vmrun list", "r");
+	if (!f)
+		return;
+
+	/* Ignore the first line */
+	ret = getline(&line, &line_len, f);
+	while ((ret = getline(&line, &line_len, f)) != -1) {
+		struct guest guest = {};
+
+		if (ret > 0 && line[ret-1] == '\n')
+			line[ret-1] = '\0';
+		if (load_vmw_guest(line, &guest.name, &guest.cid))
+			continue;
+
+		guests = realloc(guests, (guests_len + 1) * sizeof(*guests));
+		if (!guests)
+			die("Can not allocate guest buffer");
+		guests[guests_len++] = guest;
+	}
+
+	free(line);
+	pclose(f);
+}
+
 static char *parse_guest_name(char *guest, int *cid, int *port)
 {
 	size_t i;
@@ -3113,6 +3184,7 @@ static char *parse_guest_name(char *guest, int *cid, int *port)
 		*cid = atoi(guest);
 
 	read_qemu_guests();
+	read_vmw_guests();
 	for (i = 0; i < guests_len; i++) {
 		if ((*cid > 0 && *cid == guests[i].cid) ||
 		    strcmp(guest, guests[i].name) == 0) {
-- 
2.20.1


      parent reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-08  8:15 [PATCH v15 00/13] Add VM kernel tracing over vsockets and FIFOs Slavomir Kaslev
2019-10-08  8:15 ` [PATCH v15 01/13] trace-cmd: Make ports unsigned int Slavomir Kaslev
2019-10-08  8:15 ` [PATCH v15 02/13] trace-cmd: Detect if vsockets are available Slavomir Kaslev
2019-10-08  8:15 ` [PATCH v15 03/13] trace-cmd: Add tracecmd_create_recorder_virt() function Slavomir Kaslev
2019-10-08  8:15 ` [PATCH v15 04/13] trace-cmd: Add VM tracing protocol messages Slavomir Kaslev
2019-10-08  8:15 ` [PATCH v15 05/13] trace-cmd: Add buffer instance flags for tracing in guest and agent context Slavomir Kaslev
2019-10-08  8:15 ` [PATCH v15 06/13] trace-cmd: Add VM kernel tracing over vsockets transport Slavomir Kaslev
2019-10-08  8:15 ` [PATCH v15 07/13] trace-cmd: Use splice(2) for vsockets if available Slavomir Kaslev
2019-10-08  8:15 ` [PATCH v15 08/13] trace-cmd: Switch stop recording signal to SIGUSR1 Slavomir Kaslev
2019-10-08  8:15 ` [PATCH v15 09/13] trace-cmd: Add `trace-cmd setup-guest` command Slavomir Kaslev
2019-10-08  8:15 ` [PATCH v15 10/13] trace-cmd: Try to autodetect number of guest CPUs in setup-guest if not specified Slavomir Kaslev
2019-10-08  8:15 ` [PATCH v15 11/13] trace-cmd: Add setup-guest flag for attaching FIFOs to the guest VM config Slavomir Kaslev
2019-10-08  8:15 ` [PATCH v15 12/13] trace-cmd: Add VM kernel tracing over FIFO transport Slavomir Kaslev
2019-10-08  8:15 ` Slavomir Kaslev [this message]

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