Add missing long options and --help output.

convert uses -B for --backing, - why not -b?

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
---
 qemu-img.c | 90 ++++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 81 insertions(+), 9 deletions(-)

diff --git a/qemu-img.c b/qemu-img.c
index fd61b25ea7..911cdc159c 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -2403,30 +2403,100 @@ static int img_convert(const img_cmd_t *ccmd, int argc, char **argv)
     for(;;) {
         static const struct option long_options[] = {
             {"help", no_argument, 0, 'h'},
+            {"quiet", no_argument, 0, 'q'},
             {"object", required_argument, 0, OPTION_OBJECT},
             {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
+            {"source-image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
+            {"source-format", required_argument, 0, 'f'},
+            {"source-cache", required_argument, 0, 'T'},
+            {"snapshot", required_argument, 0, 'l'},
+            {"sparse-size", required_argument, 0, 'S'},
+            {"output-format", required_argument, 0, 'O'},
+            {"options", required_argument, 0, 'o'},
+            {"output-cache", required_argument, 0, 't'},
+            {"backing", required_argument, 0, 'B'},
+            {"backing-format", required_argument, 0, 'F'},
             {"force-share", no_argument, 0, 'U'},
             {"target-image-opts", no_argument, 0, OPTION_TARGET_IMAGE_OPTS},
             {"salvage", no_argument, 0, OPTION_SALVAGE},
             {"target-is-zero", no_argument, 0, OPTION_TARGET_IS_ZERO},
             {"bitmaps", no_argument, 0, OPTION_BITMAPS},
             {"skip-broken-bitmaps", no_argument, 0, OPTION_SKIP_BROKEN},
+            {"rate", required_argument, 0, 'r'},
+            {"parallel", required_argument, 0, 'm'},
+            {"oob-writes", no_argument, 0, 'W'},
+            {"copy-range-offloading", no_argument, 0, 'C'},
             {0, 0, 0, 0}
         };
-        c = getopt_long(argc, argv, ":hf:O:B:CcF:o:l:S:pt:T:qnm:WUr:",
+        c = getopt_long(argc, argv, "hf:O:B:CcF:o:l:S:pt:T:qnm:WUr:",
                         long_options, NULL);
         if (c == -1) {
             break;
         }
-        switch(c) {
-        case ':':
-            missing_argument(argv[optind - 1]);
-            break;
-        case '?':
-            unrecognized_option(argv[optind - 1]);
-            break;
+        switch (c) {
         case 'h':
-            help();
+            cmd_help(ccmd,
+"[-f SRC_FMT|--image-opts] [-T SRC_CACHE] [--bitmaps [--skip-broken-bitmaps]]\n"
+"        [-o TGT_OPTS|--target-image-opts] [-t TGT_CACHE] [-n]\n"
+"        [-B BACKING_FILENAME [-F BACKING_FMT]]\n"
+"        SRC_FILENAME [SRC_FILENAME2 [...]] TGT_FILENAME\n"
+,
+"  -q, --quiet\n"
+"     quiet operations\n"
+"  -p, --progress\n"
+"     show operation progress\n"
+"  -f, --source-format SRC_FMT\n"
+"     specify SRC_FILENAME source image format explicitly\n"
+"  --source-image-opts\n"
+"     indicates that SRC_FILENAME is a complete image specification\n"
+"     instead of a file name (incompatible with --source-format)\n"
+"  -l, --source-snapshot SNAPSHOT_PARAMS\n"
+"     specify source snapshot parameters\n"
+"  -T, --source-cache SRC_CACHE\n"
+"     source image(s) cache mode (" BDRV_DEFAULT_CACHE ")\n"
+"  -O, --target-format TGT_FMT\n"
+"     specify TGT_FILENAME image format (default is raw)\n"
+"  --target-image-opts\n"
+"     indicates that TGT_FILENAME is a complete image specification\n"
+"     instead of a file name (incompatible with --output-format)\n"
+"  -o, --target-options TGT_OPTS\n"
+"     TARGET_FMT-specific options\n"
+"  -c, --compress\n"
+"     create compressed output image (qcow and qcow2 format only)\n"
+"  -t, --target-cache TGT_CACHE\n"
+"     cache mode when opening output image (unsafe)\n"
+"  -B, --backing BACKING_FILENAME\n"
+"     create output to be a CoW on top of BACKING_FILENAME\n"
+"  -F, --backing-format BACKING_FMT\n"
+"     specify BACKING_FILENAME image format explicitly\n"
+"  -n, --no-create\n"
+"     omit target volume creation (eg on rbd)\n"
+"  --target-is-zero\n"
+"  -S, --sparse-size SPARSE_SIZE\n"
+"     XXX todo\n"
+"  --bitmaps\n"
+"     also copy any persistent bitmaps present in source\n"
+"  --skip-broken-bitmaps\n"
+"     skip (do not error out) any broken bitmaps\n"
+"  -U, --force-share\n"
+"     open images in shared mode for concurrent access\n"
+"  -r, --rate RATE\n"
+"     I/O rate limit\n"
+"  -m, --parallel NUM_COROUTINES\n"
+"     specify parallelism (default 8)\n"
+"  -C, --copy-range-offloading\n"
+"     use copy_range offloading\n"
+"  --salvage\n"
+"     XXX todo\n"
+"  -W, --oob-writes\n"
+"     enable out-of-order writes to improve performance\n"
+"  --object OBJDEF\n"
+"     QEMU user-creatable object (eg encryption key)\n"
+"  SRC_FILENAME\n"
+"     source image file name (or specification with --image-opts)\n"
+"  TGT_FILENAME\n"
+"     target (output) image file name\n"
+);
             break;
         case 'f':
             fmt = optarg;
@@ -2545,6 +2615,8 @@ static int img_convert(const img_cmd_t *ccmd, int argc, char **argv)
         case OPTION_SKIP_BROKEN:
             skip_broken = true;
             break;
+        default:
+            tryhelp(argv[0]);
         }
     }
 
-- 
2.39.2