]> Git Repo - qemu.git/blobdiff - qemu-img.c
qcow: document another weakness of qcow AES encryption
[qemu.git] / qemu-img.c
index 60f1784f1192adc7a767928b03fd9cdc8a21e42a..f7ffb79db6fcdc363fd5530fbf9c59d002c35357 100644 (file)
@@ -60,6 +60,7 @@ enum {
     OPTION_PATTERN = 260,
     OPTION_FLUSH_INTERVAL = 261,
     OPTION_NO_DRAIN = 262,
+    OPTION_TARGET_IMAGE_OPTS = 263,
 };
 
 typedef enum OutputFormat {
@@ -294,6 +295,7 @@ static BlockBackend *img_open_opts(const char *optstr,
         if (qdict_haskey(options, BDRV_OPT_FORCE_SHARE)
             && !qdict_get_bool(options, BDRV_OPT_FORCE_SHARE)) {
             error_report("--force-share/-U conflicts with image options");
+            QDECREF(options);
             return NULL;
         }
         qdict_put_bool(options, BDRV_OPT_FORCE_SHARE, true);
@@ -313,14 +315,17 @@ static BlockBackend *img_open_opts(const char *optstr,
 }
 
 static BlockBackend *img_open_file(const char *filename,
+                                   QDict *options,
                                    const char *fmt, int flags,
                                    bool writethrough, bool quiet,
                                    bool force_share)
 {
     BlockBackend *blk;
     Error *local_err = NULL;
-    QDict *options = qdict_new();
 
+    if (!options) {
+        options = qdict_new();
+    }
     if (fmt) {
         qdict_put_str(options, "driver", fmt);
     }
@@ -343,6 +348,35 @@ static BlockBackend *img_open_file(const char *filename,
 }
 
 
+static int img_add_key_secrets(void *opaque,
+                               const char *name, const char *value,
+                               Error **errp)
+{
+    QDict *options = opaque;
+
+    if (g_str_has_suffix(name, "key-secret")) {
+        qdict_put(options, name, qstring_from_str(value));
+    }
+
+    return 0;
+}
+
+static BlockBackend *img_open_new_file(const char *filename,
+                                       QemuOpts *create_opts,
+                                       const char *fmt, int flags,
+                                       bool writethrough, bool quiet,
+                                       bool force_share)
+{
+    QDict *options = NULL;
+
+    options = qdict_new();
+    qemu_opt_foreach(create_opts, img_add_key_secrets, options, &error_abort);
+
+    return img_open_file(filename, options, fmt, flags, writethrough, quiet,
+                         force_share);
+}
+
+
 static BlockBackend *img_open(bool image_opts,
                               const char *filename,
                               const char *fmt, int flags, bool writethrough,
@@ -363,7 +397,7 @@ static BlockBackend *img_open(bool image_opts,
         blk = img_open_opts(filename, opts, flags, writethrough, quiet,
                             force_share);
     } else {
-        blk = img_open_file(filename, fmt, flags, writethrough, quiet,
+        blk = img_open_file(filename, NULL, fmt, flags, writethrough, quiet,
                             force_share);
     }
     return blk;
@@ -430,7 +464,7 @@ static int img_create(int argc, char **argv)
             {"object", required_argument, 0, OPTION_OBJECT},
             {0, 0, 0, 0}
         };
-        c = getopt_long(argc, argv, ":F:b:f:he6o:q",
+        c = getopt_long(argc, argv, ":F:b:f:ho:q",
                         long_options, NULL);
         if (c == -1) {
             break;
@@ -454,14 +488,6 @@ static int img_create(int argc, char **argv)
         case 'f':
             fmt = optarg;
             break;
-        case 'e':
-            error_report("option -e is deprecated, please use \'-o "
-                  "encryption\' instead!");
-            goto fail;
-        case '6':
-            error_report("option -6 is deprecated, please use \'-o "
-                  "compat6\' instead!");
-            goto fail;
         case 'o':
             if (!is_valid_option_list(optarg)) {
                 error_report("Invalid option list: %s", optarg);
@@ -853,22 +879,28 @@ static void common_block_job_cb(void *opaque, int ret)
 static void run_block_job(BlockJob *job, Error **errp)
 {
     AioContext *aio_context = blk_get_aio_context(job->blk);
+    int ret = 0;
 
-    /* FIXME In error cases, the job simply goes away and we access a dangling
-     * pointer below. */
     aio_context_acquire(aio_context);
+    block_job_ref(job);
     do {
         aio_poll(aio_context, true);
         qemu_progress_print(job->len ?
                             ((float)job->offset / job->len * 100.f) : 0.0f, 0);
-    } while (!job->ready);
+    } while (!job->ready && !job->completed);
 
-    block_job_complete_sync(job, errp);
+    if (!job->completed) {
+        ret = block_job_complete_sync(job, errp);
+    } else {
+        ret = job->ret;
+    }
+    block_job_unref(job);
     aio_context_release(aio_context);
 
-    /* A block job may finish instantaneously without publishing any progress,
-     * so just signal completion here */
-    qemu_progress_print(100.f, 0);
+    /* publish completion progress only when success */
+    if (!ret) {
+        qemu_progress_print(100.f, 0);
+    }
 }
 
 static int img_commit(int argc, char **argv)
@@ -1476,12 +1508,16 @@ static int img_compare(int argc, char **argv)
         }
 
         for (;;) {
+            int64_t count;
+
             nb_sectors = sectors_to_process(total_sectors_over, sector_num);
             if (nb_sectors <= 0) {
                 break;
             }
-            ret = bdrv_is_allocated_above(blk_bs(blk_over), NULL, sector_num,
-                                          nb_sectors, &pnum);
+            ret = bdrv_is_allocated_above(blk_bs(blk_over), NULL,
+                                          sector_num * BDRV_SECTOR_SIZE,
+                                          nb_sectors * BDRV_SECTOR_SIZE,
+                                          &count);
             if (ret < 0) {
                 ret = 3;
                 error_report("Sector allocation test failed for %s",
@@ -1489,7 +1525,10 @@ static int img_compare(int argc, char **argv)
                 goto out;
 
             }
-            nb_sectors = pnum;
+            /* TODO relax this once bdrv_is_allocated_above does not enforce
+             * sector alignment */
+            assert(QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE));
+            nb_sectors = count >> BDRV_SECTOR_BITS;
             if (ret) {
                 ret = check_empty_sectors(blk_over, sector_num, nb_sectors,
                                           filename_over, buf1, quiet);
@@ -1913,10 +1952,10 @@ static int convert_do_copy(ImgConvertState *s)
 static int img_convert(int argc, char **argv)
 {
     int c, bs_i, flags, src_flags = 0;
-    const char *fmt = NULL, *out_fmt = "raw", *cache = "unsafe",
+    const char *fmt = NULL, *out_fmt = NULL, *cache = "unsafe",
                *src_cache = BDRV_DEFAULT_CACHE, *out_baseimg = NULL,
                *out_filename, *out_baseimg_param, *snapshot_name = NULL;
-    BlockDriver *drv, *proto_drv;
+    BlockDriver *drv = NULL, *proto_drv = NULL;
     BlockDriverInfo bdi;
     BlockDriverState *out_bs;
     QemuOpts *opts = NULL, *sn_opts = NULL;
@@ -1924,7 +1963,7 @@ static int img_convert(int argc, char **argv)
     char *options = NULL;
     Error *local_err = NULL;
     bool writethrough, src_writethrough, quiet = false, image_opts = false,
-         skip_create = false, progress = false;
+         skip_create = false, progress = false, tgt_image_opts = false;
     int64_t ret = -EINVAL;
     bool force_share = false;
 
@@ -1942,9 +1981,10 @@ static int img_convert(int argc, char **argv)
             {"object", required_argument, 0, OPTION_OBJECT},
             {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
             {"force-share", no_argument, 0, 'U'},
+            {"target-image-opts", no_argument, 0, OPTION_TARGET_IMAGE_OPTS},
             {0, 0, 0, 0}
         };
-        c = getopt_long(argc, argv, ":hf:O:B:ce6o:s:l:S:pt:T:qnm:WU",
+        c = getopt_long(argc, argv, ":hf:O:B:co:s:l:S:pt:T:qnm:WU",
                         long_options, NULL);
         if (c == -1) {
             break;
@@ -1971,14 +2011,6 @@ static int img_convert(int argc, char **argv)
         case 'c':
             s.compressed = true;
             break;
-        case 'e':
-            error_report("option -e is deprecated, please use \'-o "
-                  "encryption\' instead!");
-            goto fail_getopt;
-        case '6':
-            error_report("option -6 is deprecated, please use \'-o "
-                  "compat6\' instead!");
-            goto fail_getopt;
         case 'o':
             if (!is_valid_option_list(optarg)) {
                 error_report("Invalid option list: %s", optarg);
@@ -2062,9 +2094,16 @@ static int img_convert(int argc, char **argv)
         case OPTION_IMAGE_OPTS:
             image_opts = true;
             break;
+        case OPTION_TARGET_IMAGE_OPTS:
+            tgt_image_opts = true;
+            break;
         }
     }
 
+    if (!out_fmt && !tgt_image_opts) {
+        out_fmt = "raw";
+    }
+
     if (qemu_opts_foreach(&qemu_object_opts,
                           user_creatable_add_opts_foreach,
                           NULL, NULL)) {
@@ -2076,12 +2115,22 @@ static int img_convert(int argc, char **argv)
         goto fail_getopt;
     }
 
+    if (tgt_image_opts && !skip_create) {
+        error_report("--target-image-opts requires use of -n flag");
+        goto fail_getopt;
+    }
+
     s.src_num = argc - optind - 1;
     out_filename = s.src_num >= 1 ? argv[argc - 1] : NULL;
 
     if (options && has_help_option(options)) {
-        ret = print_block_option_help(out_filename, out_fmt);
-        goto fail_getopt;
+        if (out_fmt) {
+            ret = print_block_option_help(out_filename, out_fmt);
+            goto fail_getopt;
+        } else {
+            error_report("Option help requires a format be specified");
+            goto fail_getopt;
+        }
     }
 
     if (s.src_num < 1) {
@@ -2146,22 +2195,22 @@ static int img_convert(int argc, char **argv)
         goto out;
     }
 
-    /* Find driver and parse its options */
-    drv = bdrv_find_format(out_fmt);
-    if (!drv) {
-        error_report("Unknown file format '%s'", out_fmt);
-        ret = -1;
-        goto out;
-    }
+    if (!skip_create) {
+        /* Find driver and parse its options */
+        drv = bdrv_find_format(out_fmt);
+        if (!drv) {
+            error_report("Unknown file format '%s'", out_fmt);
+            ret = -1;
+            goto out;
+        }
 
-    proto_drv = bdrv_find_protocol(out_filename, true, &local_err);
-    if (!proto_drv) {
-        error_report_err(local_err);
-        ret = -1;
-        goto out;
-    }
+        proto_drv = bdrv_find_protocol(out_filename, true, &local_err);
+        if (!proto_drv) {
+            error_report_err(local_err);
+            ret = -1;
+            goto out;
+        }
 
-    if (!skip_create) {
         if (!drv->create_opts) {
             error_report("Format driver '%s' does not support image creation",
                          drv->format_name);
@@ -2218,7 +2267,7 @@ static int img_convert(int argc, char **argv)
         const char *preallocation =
             qemu_opt_get(opts, BLOCK_OPT_PREALLOC);
 
-        if (!drv->bdrv_co_pwritev_compressed) {
+        if (drv && !drv->bdrv_co_pwritev_compressed) {
             error_report("Compression not supported for this file format");
             ret = -1;
             goto out;
@@ -2258,19 +2307,30 @@ static int img_convert(int argc, char **argv)
         goto out;
     }
 
-    /* XXX we should allow --image-opts to trigger use of
-     * img_open() here, but then we have trouble with
-     * the bdrv_create() call which takes different params.
-     * Not critical right now, so fix can wait...
-     */
-    s.target = img_open_file(out_filename, out_fmt, flags, writethrough, quiet,
-                             false);
+    if (skip_create) {
+        s.target = img_open(tgt_image_opts, out_filename, out_fmt,
+                            flags, writethrough, quiet, false);
+    } else {
+        /* TODO ultimately we should allow --target-image-opts
+         * to be used even when -n is not given.
+         * That has to wait for bdrv_create to be improved
+         * to allow filenames in option syntax
+         */
+        s.target = img_open_new_file(out_filename, opts, out_fmt,
+                                     flags, writethrough, quiet, false);
+    }
     if (!s.target) {
         ret = -1;
         goto out;
     }
     out_bs = blk_bs(s.target);
 
+    if (s.compressed && !out_bs->drv->bdrv_co_pwritev_compressed) {
+        error_report("Compression not supported for this file format");
+        ret = -1;
+        goto out;
+    }
+
     /* increase bufsectors from the default 4096 (2M) if opt_transfer
      * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB)
      * as maximum. */
@@ -3205,6 +3265,7 @@ static int img_rebase(int argc, char **argv)
         int64_t new_backing_num_sectors = 0;
         uint64_t sector;
         int n;
+        int64_t count;
         float local_progress = 0;
 
         buf_old = blk_blockalign(blk, IO_BUF_SIZE);
@@ -3252,12 +3313,17 @@ static int img_rebase(int argc, char **argv)
             }
 
             /* If the cluster is allocated, we don't need to take action */
-            ret = bdrv_is_allocated(bs, sector, n, &n);
+            ret = bdrv_is_allocated(bs, sector << BDRV_SECTOR_BITS,
+                                    n << BDRV_SECTOR_BITS, &count);
             if (ret < 0) {
                 error_report("error while reading image metadata: %s",
                              strerror(-ret));
                 goto out;
             }
+            /* TODO relax this once bdrv_is_allocated does not enforce
+             * sector alignment */
+            assert(QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE));
+            n = count >> BDRV_SECTOR_BITS;
             if (ret) {
                 continue;
             }
@@ -4157,6 +4223,7 @@ static int img_dd(int argc, char **argv)
     };
     const struct option long_options[] = {
         { "help", no_argument, 0, 'h'},
+        { "object", required_argument, 0, OPTION_OBJECT},
         { "image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
         { "force-share", no_argument, 0, 'U'},
         { 0, 0, 0, 0 }
@@ -4185,6 +4252,12 @@ static int img_dd(int argc, char **argv)
         case 'U':
             force_share = true;
             break;
+        case OPTION_OBJECT:
+            if (!qemu_opts_parse_noisily(&qemu_object_opts, optarg, true)) {
+                ret = -1;
+                goto out;
+            }
+            break;
         case OPTION_IMAGE_OPTS:
             image_opts = true;
             break;
@@ -4229,6 +4302,14 @@ static int img_dd(int argc, char **argv)
         ret = -1;
         goto out;
     }
+
+    if (qemu_opts_foreach(&qemu_object_opts,
+                          user_creatable_add_opts_foreach,
+                          NULL, NULL)) {
+        ret = -1;
+        goto out;
+    }
+
     blk1 = img_open(image_opts, in.filename, fmt, 0, false, false,
                     force_share);
 
@@ -4297,8 +4378,13 @@ static int img_dd(int argc, char **argv)
         goto out;
     }
 
-    blk2 = img_open(image_opts, out.filename, out_fmt, BDRV_O_RDWR,
-                    false, false, false);
+    /* TODO, we can't honour --image-opts for the target,
+     * since it needs to be given in a format compatible
+     * with the bdrv_create() call above which does not
+     * support image-opts style.
+     */
+    blk2 = img_open_file(out.filename, NULL, out_fmt, BDRV_O_RDWR,
+                         false, false, false);
 
     if (!blk2) {
         ret = -1;
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