qemu-io: Remove "growable" option

Remove "growable" option from the "open" command and from the qemu-io
command line. qemu-io is about to be converted to BlockBackend which
will make sure that no request exceeds the image size, so the only way
to keep "growable" would be to use BlockBackend if it is not given and
to directly access the BDS if it is.

qemu-io is a debugging tool, therefore removing a rarely used option
will have only a very small impact, if any. There was only one
qemu-iotest which used the option; since it is not critical, this patch
just removes it.
Signed-off-by: NMax Reitz <mreitz@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Message-id: 1423162705-32065-13-git-send-email-mreitz@redhat.com
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

qemu-io.c

@@ -51,7 +51,7 @@ static const cmdinfo_t close_cmd = {
     .oneline    = "close the current open file",
 };
 
-static int openfile(char *name, int flags, int growable, QDict *opts)
+static int openfile(char *name, int flags, QDict *opts)
 {
     Error *local_err = NULL;
 
@@ -61,10 +61,6 @@ static int openfile(char *name, int flags, int growable, QDict *opts)
         return 1;
     }
 
-    if (growable) {
-        flags |= BDRV_O_PROTOCOL;
-    }
-
     qemuio_blk = blk_new_open("hda", name, NULL, opts, flags, &local_err);
     if (!qemuio_blk) {
         fprintf(stderr, "%s: can't open%s%s: %s\n", progname,
@@ -91,7 +87,6 @@ static void open_help(void)
 " -r, -- open file read-only\n"
 " -s, -- use snapshot file\n"
 " -n, -- disable host cache\n"
-" -g, -- allow file to grow (only applies to protocols)\n"
 " -o, -- options to be given to the block driver"
 "\n");
 }
@@ -124,7 +119,6 @@ static int open_f(BlockDriverState *bs, int argc, char **argv)
 {
     int flags = 0;
     int readonly = 0;
-    int growable = 0;
     int c;
     QemuOpts *qopts;
     QDict *opts;
@@ -140,9 +134,6 @@ static int open_f(BlockDriverState *bs, int argc, char **argv)
         case 'r':
             readonly = 1;
             break;
-        case 'g':
-            growable = 1;
-            break;
         case 'o':
             if (!qemu_opts_parse(&empty_opts, optarg, 0)) {
                 printf("could not parse option list -- %s\n", optarg);
@@ -165,9 +156,9 @@ static int open_f(BlockDriverState *bs, int argc, char **argv)
     qemu_opts_reset(&empty_opts);
 
     if (optind == argc - 1) {
-        return openfile(argv[optind], flags, growable, opts);
+        return openfile(argv[optind], flags, opts);
     } else if (optind == argc) {
-        return openfile(NULL, flags, growable, opts);
+        return openfile(NULL, flags, opts);
     } else {
         QDECREF(opts);
         return qemuio_command_usage(&open_cmd);
@@ -201,7 +192,6 @@ static void usage(const char *name)
 "  -r, --read-only      export read-only\n"
 "  -s, --snapshot       use snapshot file\n"
 "  -n, --nocache        disable host cache\n"
-"  -g, --growable       allow file to grow (only applies to protocols)\n"
 "  -m, --misalign       misalign allocations for O_DIRECT\n"
 "  -k, --native-aio     use kernel AIO implementation (on Linux only)\n"
 "  -t, --cache=MODE     use the given cache mode for the image\n"
@@ -360,7 +350,6 @@ static void reenable_tty_echo(void)
 int main(int argc, char **argv)
 {
     int readonly = 0;
-    int growable = 0;
     const char *sopt = "hVc:d:f:rsnmgkt:T:";
     const struct option lopt[] = {
         { "help", 0, NULL, 'h' },
@@ -372,7 +361,6 @@ int main(int argc, char **argv)
         { "snapshot", 0, NULL, 's' },
         { "nocache", 0, NULL, 'n' },
         { "misalign", 0, NULL, 'm' },
-        { "growable", 0, NULL, 'g' },
         { "native-aio", 0, NULL, 'k' },
         { "discard", 1, NULL, 'd' },
         { "cache", 1, NULL, 't' },
@@ -423,9 +411,6 @@ int main(int argc, char **argv)
         case 'm':
             qemuio_misalign = true;
             break;
-        case 'g':
-            growable = 1;
-            break;
         case 'k':
             flags |= BDRV_O_NATIVE_AIO;
             break;
@@ -483,7 +468,7 @@ int main(int argc, char **argv)
     }
 
     if ((argc - optind) == 1) {
-        openfile(argv[optind], flags, growable, opts);
+        openfile(argv[optind], flags, opts);
     }
     command_loop();
 

tests/qemu-iotests/016

-#!/bin/bash
-#
-# Test I/O after EOF for growable images.
-#
-# Copyright (C) 2009 Red Hat, Inc.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-#
-
-# creator
-owner=hch@lst.de
-
-seq=`basename $0`
-echo "QA output created by $seq"
-
-here=`pwd`
-tmp=/tmp/$$
-status=1	# failure is the default!
-
-_cleanup()
-{
-	_cleanup_test_img
-}
-trap "_cleanup; exit \$status" 0 1 2 3 15
-
-# get standard environment, filters and checks
-. ./common.rc
-. ./common.filter
-
-_supported_fmt raw
-_supported_proto file sheepdog nfs
-_supported_os Linux
-
-
-# No -f, use probing for the protocol driver
-QEMU_IO_PROTO="$QEMU_IO_PROG -g --cache $CACHEMODE"
-
-size=128M
-_make_test_img $size
-
-echo
-echo "== reading at EOF =="
-$QEMU_IO_PROTO -c "read -P 0 $size 512" "$TEST_IMG" | _filter_qemu_io
-
-echo
-echo "== reading far past EOF =="
-$QEMU_IO_PROTO -c "read -P 0 256M 512" "$TEST_IMG" | _filter_qemu_io
-
-echo
-echo "== writing at EOF =="
-$QEMU_IO_PROTO -c "write -P 66 $size 512" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "read -P 66 $size 512" "$TEST_IMG" | _filter_qemu_io
-
-echo
-echo "== writing far past EOF =="
-$QEMU_IO_PROTO -c "write -P 66 256M 512" "$TEST_IMG" | _filter_qemu_io
-$QEMU_IO -c "read -P 66 256M 512" "$TEST_IMG" | _filter_qemu_io
-
-# success, all done
-echo "*** done"
-rm -f $seq.full
-status=0

tests/qemu-iotests/016.out

-QA output created by 016
-Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
-
-== reading at EOF ==
-read 512/512 bytes at offset 134217728
-512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-
-== reading far past EOF ==
-read 512/512 bytes at offset 268435456
-512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-
-== writing at EOF ==
-wrote 512/512 bytes at offset 134217728
-512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-read 512/512 bytes at offset 134217728
-512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-
-== writing far past EOF ==
-wrote 512/512 bytes at offset 268435456
-512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-read 512/512 bytes at offset 268435456
-512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-*** done

tests/qemu-iotests/group

@@ -22,7 +22,7 @@
 013 rw auto
 014 rw auto
 015 rw snapshot auto
-016 rw auto quick
+# 016 was removed, do not reuse
 017 rw backing auto quick
 018 rw backing auto quick
 019 rw backing auto quick