chiark / gitweb /
[PATCH] more extras/multipath updates
[elogind.git] / extras / multipath / main.c
index 0ed74c5..9bceb26 100644 (file)
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <linux/kdev_t.h>
-#include <errno.h>
 #include <string.h>
 #include <sys/ioctl.h>
 #include <libsysfs.h>
-#include <libdevmapper.h>
+#include "libdevmapper/libdevmapper.h"
 #include "main.h"
 
 static int
 do_inq(int sg_fd, int cmddt, int evpd, unsigned int pg_op,
        void *resp, int mx_resp_len, int noisy)
 {
-       int res;
        unsigned char inqCmdBlk[INQUIRY_CMDLEN] =
            { INQUIRY_CMD, 0, 0, 0, 0, 0 };
        unsigned char sense_b[SENSE_BUFF_LEN];
@@ -61,14 +59,27 @@ do_inq(int sg_fd, int cmddt, int evpd, unsigned int pg_op,
                perror("SG_IO (inquiry) error");
                return -1;
        }
-       res = sg_err_category3(&io_hdr);
-       switch (res) {
-       case SG_ERR_CAT_CLEAN:
-       case SG_ERR_CAT_RECOVERED:
+
+       /* treat SG_ERR here to get rid of sg_err.[ch] */
+       io_hdr.status &= 0x7e;
+       if ((0 == io_hdr.status) && (0 == io_hdr.host_status) &&
+           (0 == io_hdr.driver_status))
                return 0;
-       default:
-               return -1;
+       if ((SCSI_CHECK_CONDITION == io_hdr.status) ||
+           (SCSI_COMMAND_TERMINATED == io_hdr.status) ||
+           (SG_ERR_DRIVER_SENSE == (0xf & io_hdr.driver_status))) {
+               if (io_hdr.sbp && (io_hdr.sb_len_wr > 2)) {
+                       int sense_key;
+                       unsigned char * sense_buffer = io_hdr.sbp;
+                       if (sense_buffer[0] & 0x2)
+                               sense_key = sense_buffer[1] & 0xf;
+                       else
+                               sense_key = sense_buffer[2] & 0xf;
+                       if(RECOVERED_ERROR == sense_key)
+                               return 0;
+               }
        }
+       return -1;
 }
 
 static int
@@ -191,7 +202,7 @@ get_all_paths_sysfs(struct env * conf, struct path * all_paths)
        int sg_fd;
        struct sysfs_directory * sdir;
        struct sysfs_directory * devp;
-       struct sysfs_dlink * linkp;
+       struct sysfs_link * linkp;
        char buff[FILE_NAME_SIZE];
 
        char block_path[FILE_NAME_SIZE];
@@ -199,17 +210,15 @@ get_all_paths_sysfs(struct env * conf, struct path * all_paths)
        sprintf(block_path, "%s/block", conf->sysfs_path);
        sdir = sysfs_open_directory(block_path);
        sysfs_read_directory(sdir);
-       devp = sdir->subdirs;
-       while (devp != NULL) {
+       dlist_for_each_data(sdir->subdirs, devp, struct sysfs_directory) {
                sysfs_read_directory(devp);
-               linkp = devp->links;
-               while (linkp != NULL) {
+               if(devp->links == NULL)
+                       continue;
+               dlist_for_each_data(devp->links, linkp, struct sysfs_link) {
                        if (!strncmp(linkp->name, "device", 6))
                                break;
-                       linkp = linkp->next;
                }
                if (linkp == NULL) {
-                       devp = devp->next;
                        continue;
                }
 
@@ -217,21 +226,19 @@ get_all_paths_sysfs(struct env * conf, struct path * all_paths)
                sprintf(all_paths[k].sg_dev, "/dev/%s", buff);
                strcpy(all_paths[k].dev, all_paths[k].sg_dev);
                if ((sg_fd = open(all_paths[k].sg_dev, O_RDONLY)) < 0) {
-                       devp = devp->next;
                        continue;
                }
                get_lun_strings(sg_fd, &all_paths[k]);
                get_unique_id(sg_fd, &all_paths[k]);
                all_paths[k].state = do_tur(sg_fd);
                close(sg_fd);
-               basename(linkp->target->path, buff);
+               basename(linkp->target, buff);
                sscanf(buff, "%i:%i:%i:%i",
                        &all_paths[k].sg_id.host_no,
                        &all_paths[k].sg_id.channel,
                        &all_paths[k].sg_id.scsi_id,
                        &all_paths[k].sg_id.lun);
                k++;
-               devp = devp->next;
        }
        sysfs_close_directory(sdir);
 
@@ -451,9 +458,7 @@ static int
 make_dm_node(char * str)
 {
        int r = 0;
-       dev_t dev;
        char buff[FILE_NAME_SIZE];
-       int major, minor;
        struct dm_names * names;
         unsigned next = 0;
        struct dm_task *dmt;
@@ -479,14 +484,9 @@ make_dm_node(char * str)
                 names = (void *) names + next;
         } while (next);
 
-       major = (int) MAJOR(names->dev);
-       minor = (int) MINOR(names->dev);
-
-       dev = major << sizeof(dev_t);
-       dev = dev | minor;
        sprintf(buff, "/dev/mapper/%s", str);
        unlink(buff);
-       mknod(buff, 0600 | S_IFBLK, dev);
+       mknod(buff, 0600 | S_IFBLK, names->dev);
 
        out:
        dm_task_destroy(dmt);
@@ -660,9 +660,19 @@ usage(char * progname)
        exit(1);
 }
 
+static int
+running(char * run) {
+       struct stat buf;
+
+       if(!stat(run, &buf))
+               return 1;
+       return 0;
+}
+
 int
 main(int argc, char *argv[])
 {
+       char * run = "/var/run/multipath.run";
        struct multipath * mp;
        struct path * all_paths;
        struct scsi_dev * all_scsi_ids;
@@ -705,12 +715,26 @@ main(int argc, char *argv[])
 
        }
 
+       if (running(run)) {
+               if (conf.verbose) {
+                       fprintf(stderr, "Already running.\n");
+                       fprintf(stderr, "If you know what you do, please ");
+                       fprintf(stderr, "remove %s\n", run);
+               }
+               return 1;
+       }
+
+       if(!open(run, O_CREAT))
+               exit(1);
+
        /* dynamic allocations */
        mp = malloc(conf.max_devs * sizeof(struct multipath));
        all_paths = malloc(conf.max_devs * sizeof(struct path));
        all_scsi_ids = malloc(conf.max_devs * sizeof(struct scsi_dev));
-       if (mp == NULL || all_paths == NULL || all_scsi_ids == NULL)
+       if (mp == NULL || all_paths == NULL || all_scsi_ids == NULL) {
+               unlink(run);
                exit(1);
+       }
 
        if (!conf.with_sysfs) {
                get_all_scsi_ids(&conf, all_scsi_ids);
@@ -722,13 +746,15 @@ main(int argc, char *argv[])
 
        if (conf.verbose) {
                print_all_path(&conf, all_paths);
-               printf("\n");
+               fprintf(stdout, "\n");
                print_all_mp(all_paths, mp, nmp);
-               printf("\n");
+               fprintf(stdout, "\n");
        }
 
-       if (conf.dry_run)
+       if (conf.dry_run) {
+               unlink(run);
                exit(0);
+       }
 
        for (k=0; k<=nmp; k++) {
                if (map_present(mp[k].wwid)) {
@@ -737,5 +763,6 @@ main(int argc, char *argv[])
                        add_map(&conf, all_paths, mp, k, DM_DEVICE_CREATE);
                }
        }
+       unlink(run);
        exit(0);
 }