fsdev/qemu-fsdev.c

   1 /*
   2  * Virtio 9p
   3  *
   4  * Copyright IBM, Corp. 2010
   5  *
   6  * Authors:
   7  *  Gautham R Shenoy <ego@in.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2.  See
  10  * the COPYING file in the top-level directory.
  11  *
  12  */
  13 #include <stdio.h>
  14 #include <string.h>
  15 #include "qemu-fsdev.h"
  16 #include "qemu-queue.h"
  17 #include "osdep.h"
  18 #include "qemu-common.h"
  19 #include "qemu-config.h"
  20
  21 static QTAILQ_HEAD(FsTypeEntry_head, FsTypeListEntry) fstype_entries =
  22     QTAILQ_HEAD_INITIALIZER(fstype_entries);
  23
  24 static FsTypeTable FsTypes[] = {
  25     { .name = "local", .ops = &local_ops},
  26     { .name = "handle", .ops = &handle_ops},
  27 };
  28
  29 int qemu_fsdev_add(QemuOpts *opts)
  30 {
  31     struct FsTypeListEntry *fsle;
  32     int i;
  33     const char *fsdev_id = qemu_opts_id(opts);
  34     const char *fstype = qemu_opt_get(opts, "fstype");
  35     const char *path = qemu_opt_get(opts, "path");
  36     const char *sec_model = qemu_opt_get(opts, "security_model");
  37
  38     if (!fsdev_id) {
  39         fprintf(stderr, "fsdev: No id specified\n");
  40         return -1;
  41     }
  42
  43     if (fstype) {
  44         for (i = 0; i < ARRAY_SIZE(FsTypes); i++) {
  45             if (strcmp(FsTypes[i].name, fstype) == 0) {
  46                 break;
  47             }
  48         }
  49
  50         if (i == ARRAY_SIZE(FsTypes)) {
  51             fprintf(stderr, "fsdev: fstype %s not found\n", fstype);
  52             return -1;
  53         }
  54     } else {
  55         fprintf(stderr, "fsdev: No fstype specified\n");
  56         return -1;
  57     }
  58
  59     if (!sec_model) {
  60         fprintf(stderr, "fsdev: No security_model specified.\n");
  61         return -1;
  62     }
  63
  64     if (!path) {
  65         fprintf(stderr, "fsdev: No path specified.\n");
  66         return -1;
  67     }
  68
  69     fsle = g_malloc(sizeof(*fsle));
  70
  71     fsle->fse.fsdev_id = g_strdup(fsdev_id);
  72     fsle->fse.path = g_strdup(path);
  73     fsle->fse.security_model = g_strdup(sec_model);
  74     fsle->fse.ops = FsTypes[i].ops;
  75
  76     QTAILQ_INSERT_TAIL(&fstype_entries, fsle, next);
  77     return 0;
  78
  79 }
  80
  81 FsTypeEntry *get_fsdev_fsentry(char *id)
  82 {
  83     if (id) {
  84         struct FsTypeListEntry *fsle;
  85
  86         QTAILQ_FOREACH(fsle, &fstype_entries, next) {
  87             if (strcmp(fsle->fse.fsdev_id, id) == 0) {
  88                 return &fsle->fse;
  89             }
  90         }
  91     }
  92     return NULL;
  93 }
  94
  95 static void fsdev_register_config(void)
  96 {
  97     qemu_add_opts(&qemu_fsdev_opts);
  98     qemu_add_opts(&qemu_virtfs_opts);
  99 }
 100 machine_init(fsdev_register_config);
 101