tcg/cpu-exec: precise single-stepping after an exception

[mirror_qemu.git] / scsi / qemu-pr-helper.c

diff --git a/scsi/qemu-pr-helper.c b/scsi/qemu-pr-helper.c
index 1528a712a0cf9c8ad4221ddd0d33e1173c771f05..57ad830d5494c52bd5633e65f06ff45ccacceae3 100644 (file)
--- a/scsi/qemu-pr-helper.c
+++ b/scsi/qemu-pr-helper.c
@@ -24,7 +24,7 @@
 #include <linux/dm-ioctl.h>
 #include <scsi/sg.h>
 
-#ifdef CONFIG_LIBCAP
+#ifdef CONFIG_LIBCAP_NG
 #include <cap-ng.h>
 #endif
 #include <pwd.h>
@@ -36,10 +36,11 @@
 #include <mpath_persist.h>
 #endif
 
-#include "qapi/error.h"
 #include "qemu-common.h"
+#include "qapi/error.h"
 #include "qemu/cutils.h"
 #include "qemu/main-loop.h"
+#include "qemu/module.h"
 #include "qemu/error-report.h"
 #include "qemu/config-file.h"
 #include "qemu/bswap.h"
@@ -69,7 +70,7 @@ static int num_active_sockets = 1;
 static int noisy;
 static int verbose;
 
-#ifdef CONFIG_LIBCAP
+#ifdef CONFIG_LIBCAP_NG
 static int uid = -1;
 static int gid = -1;
 #endif
@@ -96,7 +97,7 @@ static void usage(const char *name)
 "                            (default '%s')\n"
 "  -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
 "                            specify tracing options\n"
-#ifdef CONFIG_LIBCAP
+#ifdef CONFIG_LIBCAP_NG
 "  -u, --user=USER           user to drop privileges to\n"
 "  -g, --group=GROUP         group to drop privileges to\n"
 #endif
@@ -117,39 +118,6 @@ QEMU_COPYRIGHT "\n"
     , name);
 }
 
-static void write_pidfile(void)
-{
-    int pidfd;
-    char pidstr[32];
-
-    pidfd = qemu_open(pidfile, O_CREAT|O_WRONLY, S_IRUSR|S_IWUSR);
-    if (pidfd == -1) {
-        error_report("Cannot open pid file, %s", strerror(errno));
-        exit(EXIT_FAILURE);
-    }
-
-    if (lockf(pidfd, F_TLOCK, 0)) {
-        error_report("Cannot lock pid file, %s", strerror(errno));
-        goto fail;
-    }
-    if (ftruncate(pidfd, 0)) {
-        error_report("Failed to truncate pid file");
-        goto fail;
-    }
-
-    snprintf(pidstr, sizeof(pidstr), "%d\n", getpid());
-    if (write(pidfd, pidstr, strlen(pidstr)) != strlen(pidstr)) {
-        error_report("Failed to write pid file");
-        goto fail;
-    }
-    return;
-
-fail:
-    unlink(pidfile);
-    close(pidfd);
-    exit(EXIT_FAILURE);
-}
-
 /* SG_IO support */
 
 typedef struct PRHelperSGIOData {
@@ -269,7 +237,7 @@ static void dm_init(void)
         perror("Cannot open " CONTROL_PATH);
         exit(1);
     }
-    struct dm_ioctl dm = { 0 };
+    struct dm_ioctl dm = { };
     if (!dm_ioctl(DM_VERSION, &dm)) {
         perror("ioctl");
         exit(1);
@@ -301,7 +269,11 @@ void put_multipath_config(struct config *conf)
 static void multipath_pr_init(void)
 {
     udev = udev_new();
+#ifdef CONFIG_MPATH_NEW_API
     multipath_conf = mpath_lib_init();
+#else
+    mpath_lib_init(udev);
+#endif
 }
 
 static int is_mpath(int fd)
@@ -351,10 +323,10 @@ static int mpath_reconstruct_sense(int fd, int r, uint8_t *sense)
              */
             uint8_t cdb[6] = { TEST_UNIT_READY };
             int sz = 0;
-            int r = do_sgio(fd, cdb, sense, NULL, &sz, SG_DXFER_NONE);
+            int ret = do_sgio(fd, cdb, sense, NULL, &sz, SG_DXFER_NONE);
 
-            if (r != GOOD) {
-                return r;
+            if (ret != GOOD) {
+                return ret;
             }
             scsi_build_sense(sense, mpath_generic_sense(r));
             return CHECK_CONDITION;
@@ -449,10 +421,13 @@ static int multipath_pr_out(int fd, const uint8_t *cdb, uint8_t *sense,
     int rq_servact = cdb[1];
     int rq_scope = cdb[2] >> 4;
     int rq_type = cdb[2] & 0xf;
-    struct prout_param_descriptor paramp;
+    g_autofree struct prout_param_descriptor *paramp = NULL;
     char transportids[PR_HELPER_DATA_SIZE];
     int r;
 
+    paramp = g_malloc0(sizeof(struct prout_param_descriptor)
+                       + sizeof(struct transportid *) * MPATH_MX_TIDS);
+
     if (sz < PR_OUT_FIXED_PARAM_SIZE) {
         /* Illegal request, Parameter list length error.  This isn't fatal;
          * we have read the data, send an error without closing the socket.
@@ -482,10 +457,9 @@ static int multipath_pr_out(int fd, const uint8_t *cdb, uint8_t *sense,
      * used by libmpathpersist (which, of course, will immediately
      * do the opposite).
      */
-    memset(&paramp, 0, sizeof(paramp));
-    memcpy(&paramp.key, &param[0], 8);
-    memcpy(&paramp.sa_key, &param[8], 8);
-    paramp.sa_flags = param[20];
+    memcpy(&paramp->key, &param[0], 8);
+    memcpy(&paramp->sa_key, &param[8], 8);
+    paramp->sa_flags = param[20];
     if (sz > PR_OUT_FIXED_PARAM_SIZE) {
         size_t transportid_len;
         int i, j;
@@ -548,12 +522,13 @@ static int multipath_pr_out(int fd, const uint8_t *cdb, uint8_t *sense,
                 return CHECK_CONDITION;
             }
 
-            paramp.trnptid_list[paramp.num_transportid++] = id;
+            assert(paramp->num_transportid < MPATH_MX_TIDS);
+            paramp->trnptid_list[paramp->num_transportid++] = id;
         }
     }
 
     r = mpath_persistent_reserve_out(fd, rq_servact, rq_scope, rq_type,
-                                     &paramp, noisy, verbose);
+                                     paramp, noisy, verbose);
     return mpath_reconstruct_sense(fd, r, sense);
 }
 #endif
@@ -855,7 +830,7 @@ static void close_server_socket(void)
     num_active_sockets--;
 }
 
-#ifdef CONFIG_LIBCAP
+#ifdef CONFIG_LIBCAP_NG
 static int drop_privileges(void)
 {
     /* clear all capabilities */
@@ -924,6 +899,7 @@ int main(int argc, char **argv)
 
     signal(SIGPIPE, SIG_IGN);
 
+    error_init(argv[0]);
     module_call_init(MODULE_INIT_TRACE);
     module_call_init(MODULE_INIT_QOM);
     qemu_add_opts(&qemu_trace_opts);
@@ -947,7 +923,7 @@ int main(int argc, char **argv)
             pidfile = g_strdup(optarg);
             pidfile_specified = true;
             break;
-#ifdef CONFIG_LIBCAP
+#ifdef CONFIG_LIBCAP_NG
         case 'u': {
             unsigned long res;
             struct passwd *userinfo = getpwnam(optarg);
@@ -1032,7 +1008,8 @@ int main(int argc, char **argv)
             .u.q_unix.path = socket_path,
         };
         server_ioc = qio_channel_socket_new();
-        if (qio_channel_socket_listen_sync(server_ioc, &saddr, &local_err) < 0) {
+        if (qio_channel_socket_listen_sync(server_ioc, &saddr,
+                                           1, &local_err) < 0) {
             object_unref(OBJECT(server_ioc));
             error_report_err(local_err);
             return 1;
@@ -1053,8 +1030,8 @@ int main(int argc, char **argv)
         server_ioc = qio_channel_socket_new_fd(FIRST_SOCKET_ACTIVATION_FD,
                                                &local_err);
         if (server_ioc == NULL) {
-            error_report("Failed to use socket activation: %s",
-                         error_get_pretty(local_err));
+            error_reportf_err(local_err,
+                              "Failed to use socket activation: ");
             exit(EXIT_FAILURE);
         }
     }
@@ -1076,10 +1053,13 @@ int main(int argc, char **argv)
         }
     }
 
-    if (daemonize || pidfile_specified)
-        write_pidfile();
+    if ((daemonize || pidfile_specified) &&
+        !qemu_write_pidfile(pidfile, &local_err)) {
+        error_report_err(local_err);
+        exit(EXIT_FAILURE);
+    }
 
-#ifdef CONFIG_LIBCAP
+#ifdef CONFIG_LIBCAP_NG
     if (drop_privileges() < 0) {
         error_report("Failed to drop privileges: %s", strerror(errno));
         exit(EXIT_FAILURE);