blockdev: Use blk_new_open() in blockdev_init()

Due to different error propagation, this breaks tests 051 and 087; fix
their output.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 1423162705-32065-6-git-send-email-mreitz@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

3 files changed, 77 insertions, 85 deletions

diff --git a/blockdev.c b/blockdev.c
index 7d34960b96..6eedcf56f8 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -354,13 +354,11 @@ static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
     ThrottleConfig cfg;
     int snapshot = 0;
     bool copy_on_read;
-    int ret;
     Error *error = NULL;
     QemuOpts *opts;
     const char *id;
     bool has_driver_specific_opts;
     BlockdevDetectZeroesOptions detect_zeroes;
-    BlockDriver *drv = NULL;
 
     /* Check common options by copying from bs_opts to opts, all other options
      * stay in bs_opts for processing by bdrv_open(). */
@@ -426,11 +424,11 @@ static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
             goto early_err;
         }
 
-        drv = bdrv_find_format(buf);
-        if (!drv) {
-            error_setg(errp, "'%s' invalid format", buf);
+        if (qdict_haskey(bs_opts, "driver")) {
+            error_setg(errp, "Cannot specify both 'driver' and 'format'");
             goto early_err;
         }
+        qdict_put(bs_opts, "driver", qstring_from_str(buf));
     }
 
     /* disk I/O throttling */
@@ -505,70 +503,64 @@ static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
     }
 
     /* init */
-    blk = blk_new_with_bs(qemu_opts_id(opts), errp);
-    if (!blk) {
-        goto early_err;
-    }
-    bs = blk_bs(blk);
-    bs->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
-    bs->read_only = ro;
-    bs->detect_zeroes = detect_zeroes;
-
-    bdrv_set_on_error(bs, on_read_error, on_write_error);
+    if ((!file || !*file) && !has_driver_specific_opts) {
+        blk = blk_new_with_bs(qemu_opts_id(opts), errp);
+        if (!blk) {
+            goto early_err;
+        }
 
-    /* disk I/O throttling */
-    if (throttle_enabled(&cfg)) {
-        bdrv_io_limits_enable(bs);
-        bdrv_set_io_limits(bs, &cfg);
-    }
+        bs = blk_bs(blk);
+        bs->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
+        bs->read_only = ro;
 
-    if (!file || !*file) {
-        if (has_driver_specific_opts) {
+        QDECREF(bs_opts);
+    } else {
+        if (file && !*file) {
             file = NULL;
-        } else {
-            QDECREF(bs_opts);
-            qemu_opts_del(opts);
-            return blk;
         }
-    }
-    if (snapshot) {
-        /* always use cache=unsafe with snapshot */
-        bdrv_flags &= ~BDRV_O_CACHE_MASK;
-        bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
-    }
 
-    if (copy_on_read) {
-        bdrv_flags |= BDRV_O_COPY_ON_READ;
-    }
+        if (snapshot) {
+            /* always use cache=unsafe with snapshot */
+            bdrv_flags &= ~BDRV_O_CACHE_MASK;
+            bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
+        }
+
+        if (copy_on_read) {
+            bdrv_flags |= BDRV_O_COPY_ON_READ;
+        }
+
+        if (runstate_check(RUN_STATE_INMIGRATE)) {
+            bdrv_flags |= BDRV_O_INCOMING;
+        }
 
-    if (runstate_check(RUN_STATE_INMIGRATE)) {
-        bdrv_flags |= BDRV_O_INCOMING;
+        bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
+
+        blk = blk_new_open(qemu_opts_id(opts), file, NULL, bs_opts, bdrv_flags,
+                           errp);
+        if (!blk) {
+            goto err_no_bs_opts;
+        }
+        bs = blk_bs(blk);
     }
 
-    bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
+    bs->detect_zeroes = detect_zeroes;
 
-    QINCREF(bs_opts);
-    ret = bdrv_open(&bs, file, NULL, bs_opts, bdrv_flags, drv, &error);
-    assert(bs == blk_bs(blk));
+    bdrv_set_on_error(bs, on_read_error, on_write_error);
 
-    if (ret < 0) {
-        error_setg(errp, "could not open disk image %s: %s",
-                   file ?: blk_name(blk), error_get_pretty(error));
-        error_free(error);
-        goto err;
+    /* disk I/O throttling */
+    if (throttle_enabled(&cfg)) {
+        bdrv_io_limits_enable(bs);
+        bdrv_set_io_limits(bs, &cfg);
     }
 
     if (bdrv_key_required(bs)) {
         autostart = 0;
     }
 
-    QDECREF(bs_opts);
+err_no_bs_opts:
     qemu_opts_del(opts);
-
     return blk;
 
-err:
-    blk_unref(blk);
 early_err:
     qemu_opts_del(opts);
 err_no_opts:
diff --git a/tests/qemu-iotests/051.out b/tests/qemu-iotests/051.out
index e727dc16c4..bf52bf02d4 100644
--- a/tests/qemu-iotests/051.out
+++ b/tests/qemu-iotests/051.out
@@ -5,46 +5,46 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file='TEST_DIR
 === Unknown option ===
 
 Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,unknown_opt=
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,unknown_opt=: could not open disk image TEST_DIR/t.qcow2: Block format 'qcow2' used by device 'ide0-hd0' doesn't support the option 'unknown_opt'
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,unknown_opt=: Block format 'qcow2' used by device 'ide0-hd0' doesn't support the option 'unknown_opt'
 
 Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,unknown_opt=on
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,unknown_opt=on: could not open disk image TEST_DIR/t.qcow2: Block format 'qcow2' used by device 'ide0-hd0' doesn't support the option 'unknown_opt'
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,unknown_opt=on: Block format 'qcow2' used by device 'ide0-hd0' doesn't support the option 'unknown_opt'
 
 Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,unknown_opt=1234
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,unknown_opt=1234: could not open disk image TEST_DIR/t.qcow2: Block format 'qcow2' used by device 'ide0-hd0' doesn't support the option 'unknown_opt'
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,unknown_opt=1234: Block format 'qcow2' used by device 'ide0-hd0' doesn't support the option 'unknown_opt'
 
 Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,unknown_opt=foo
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,unknown_opt=foo: could not open disk image TEST_DIR/t.qcow2: Block format 'qcow2' used by device 'ide0-hd0' doesn't support the option 'unknown_opt'
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,unknown_opt=foo: Block format 'qcow2' used by device 'ide0-hd0' doesn't support the option 'unknown_opt'
 
 
 === Unknown protocol option ===
 
 Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,file.unknown_opt=
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,file.unknown_opt=: could not open disk image TEST_DIR/t.qcow2: Block protocol 'file' doesn't support the option 'unknown_opt'
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,file.unknown_opt=: Block protocol 'file' doesn't support the option 'unknown_opt'
 
 Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,file.unknown_opt=on
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,file.unknown_opt=on: could not open disk image TEST_DIR/t.qcow2: Block protocol 'file' doesn't support the option 'unknown_opt'
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,file.unknown_opt=on: Block protocol 'file' doesn't support the option 'unknown_opt'
 
 Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,file.unknown_opt=1234
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,file.unknown_opt=1234: could not open disk image TEST_DIR/t.qcow2: Block protocol 'file' doesn't support the option 'unknown_opt'
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,file.unknown_opt=1234: Block protocol 'file' doesn't support the option 'unknown_opt'
 
 Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,file.unknown_opt=foo
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,file.unknown_opt=foo: could not open disk image TEST_DIR/t.qcow2: Block protocol 'file' doesn't support the option 'unknown_opt'
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,file.unknown_opt=foo: Block protocol 'file' doesn't support the option 'unknown_opt'
 
 
 === Invalid format ===
 
 Testing: -drive file=TEST_DIR/t.qcow2,format=foo
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=foo: 'foo' invalid format
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=foo: Unknown driver 'foo'
 
 Testing: -drive file=TEST_DIR/t.qcow2,driver=foo
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,driver=foo: could not open disk image TEST_DIR/t.qcow2: Unknown driver 'foo'
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,driver=foo: Unknown driver 'foo'
 
 Testing: -drive file=TEST_DIR/t.qcow2,driver=raw,format=qcow2
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,driver=raw,format=qcow2: could not open disk image TEST_DIR/t.qcow2: Driver specified twice
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,driver=raw,format=qcow2: Cannot specify both 'driver' and 'format'
 
 Testing: -drive file=TEST_DIR/t.qcow2,driver=qcow2,format=qcow2
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,driver=qcow2,format=qcow2: could not open disk image TEST_DIR/t.qcow2: Driver specified twice
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,driver=qcow2,format=qcow2: Cannot specify both 'driver' and 'format'
 
 
 === Overriding backing file ===
@@ -58,13 +58,13 @@ ide0-hd0: TEST_DIR/t.qcow2 (qcow2)
 (qemu) qququiquit
 
 Testing: -drive file=TEST_DIR/t.qcow2,driver=raw,backing.file.filename=TEST_DIR/t.qcow2.orig
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,driver=raw,backing.file.filename=TEST_DIR/t.qcow2.orig: could not open disk image TEST_DIR/t.qcow2: Driver doesn't support backing files
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,driver=raw,backing.file.filename=TEST_DIR/t.qcow2.orig: Driver doesn't support backing files
 
 Testing: -drive file=TEST_DIR/t.qcow2,file.backing.driver=file,file.backing.filename=TEST_DIR/t.qcow2.orig
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,file.backing.driver=file,file.backing.filename=TEST_DIR/t.qcow2.orig: could not open disk image TEST_DIR/t.qcow2: Driver doesn't support backing files
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,file.backing.driver=file,file.backing.filename=TEST_DIR/t.qcow2.orig: Driver doesn't support backing files
 
 Testing: -drive file=TEST_DIR/t.qcow2,file.backing.driver=qcow2,file.backing.file.filename=TEST_DIR/t.qcow2.orig
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,file.backing.driver=qcow2,file.backing.file.filename=TEST_DIR/t.qcow2.orig: could not open disk image TEST_DIR/t.qcow2: Driver doesn't support backing files
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,file.backing.driver=qcow2,file.backing.file.filename=TEST_DIR/t.qcow2.orig: Driver doesn't support backing files
 
 
 === Enable and disable lazy refcounting on the command line, plus some invalid values ===
@@ -78,20 +78,20 @@ QEMU X.Y.Z monitor - type 'help' for more information
 (qemu) qququiquit
 
 Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,lazy-refcounts=
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,lazy-refcounts=: could not open disk image TEST_DIR/t.qcow2: Parameter 'lazy-refcounts' expects 'on' or 'off'
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,lazy-refcounts=: Parameter 'lazy-refcounts' expects 'on' or 'off'
 
 Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,lazy-refcounts=42
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,lazy-refcounts=42: could not open disk image TEST_DIR/t.qcow2: Parameter 'lazy-refcounts' expects 'on' or 'off'
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,lazy-refcounts=42: Parameter 'lazy-refcounts' expects 'on' or 'off'
 
 Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,lazy-refcounts=foo
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,lazy-refcounts=foo: could not open disk image TEST_DIR/t.qcow2: Parameter 'lazy-refcounts' expects 'on' or 'off'
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,lazy-refcounts=foo: Parameter 'lazy-refcounts' expects 'on' or 'off'
 
 
 === With version 2 images enabling lazy refcounts must fail ===
 
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
 Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,lazy-refcounts=on
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,lazy-refcounts=on: could not open disk image TEST_DIR/t.qcow2: Lazy refcounts require a qcow2 image with at least qemu 1.1 compatibility level
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,format=qcow2,lazy-refcounts=on: Lazy refcounts require a qcow2 image with at least qemu 1.1 compatibility level
 
 Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,lazy-refcounts=off
 QEMU X.Y.Z monitor - type 'help' for more information
@@ -251,31 +251,31 @@ QEMU X.Y.Z monitor - type 'help' for more information
 (qemu) qququiquit
 
 Testing: -drive file=TEST_DIR/t.qcow2,file.driver=qcow2
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,file.driver=qcow2: could not open disk image TEST_DIR/t.qcow2: Block format 'qcow2' used by device '' doesn't support the option 'filename'
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,file.driver=qcow2: Block format 'qcow2' used by device '' doesn't support the option 'filename'
 
 
 === Leaving out required options ===
 
 Testing: -drive driver=file
-QEMU_PROG: -drive driver=file: could not open disk image ide0-hd0: The 'file' block driver requires a file name
+QEMU_PROG: -drive driver=file: The 'file' block driver requires a file name
 
 Testing: -drive driver=nbd
-QEMU_PROG: -drive driver=nbd: could not open disk image ide0-hd0: one of path and host must be specified.
+QEMU_PROG: -drive driver=nbd: one of path and host must be specified.
 
 Testing: -drive driver=raw
-QEMU_PROG: -drive driver=raw: could not open disk image ide0-hd0: Can't use 'raw' as a block driver for the protocol level
+QEMU_PROG: -drive driver=raw: Can't use 'raw' as a block driver for the protocol level
 
 Testing: -drive file.driver=file
-QEMU_PROG: -drive file.driver=file: could not open disk image ide0-hd0: The 'file' block driver requires a file name
+QEMU_PROG: -drive file.driver=file: The 'file' block driver requires a file name
 
 Testing: -drive file.driver=nbd
-QEMU_PROG: -drive file.driver=nbd: could not open disk image ide0-hd0: one of path and host must be specified.
+QEMU_PROG: -drive file.driver=nbd: one of path and host must be specified.
 
 Testing: -drive file.driver=raw
-QEMU_PROG: -drive file.driver=raw: could not open disk image ide0-hd0: Can't use 'raw' as a block driver for the protocol level
+QEMU_PROG: -drive file.driver=raw: Can't use 'raw' as a block driver for the protocol level
 
 Testing: -drive foo=bar
-QEMU_PROG: -drive foo=bar: could not open disk image ide0-hd0: Must specify either driver or file
+QEMU_PROG: -drive foo=bar: Must specify either driver or file
 
 
 === Specifying both an option and its legacy alias ===
@@ -326,13 +326,13 @@ QEMU_PROG: -drive file=TEST_DIR/t.qcow2,readonly=on,read-only=off: 'read-only' a
 === Parsing protocol from file name ===
 
 Testing: -hda foo:bar
-QEMU_PROG: -hda foo:bar: could not open disk image foo:bar: Unknown protocol 'foo'
+QEMU_PROG: -hda foo:bar: Unknown protocol 'foo'
 
 Testing: -drive file=foo:bar
-QEMU_PROG: -drive file=foo:bar: could not open disk image foo:bar: Unknown protocol 'foo'
+QEMU_PROG: -drive file=foo:bar: Unknown protocol 'foo'
 
 Testing: -drive file.filename=foo:bar
-QEMU_PROG: -drive file.filename=foo:bar: could not open disk image ide0-hd0: Could not open 'foo:bar': No such file or directory
+QEMU_PROG: -drive file.filename=foo:bar: Could not open 'foo:bar': No such file or directory
 
 Testing: -hda file:TEST_DIR/t.qcow2
 QEMU X.Y.Z monitor - type 'help' for more information
@@ -343,7 +343,7 @@ QEMU X.Y.Z monitor - type 'help' for more information
 (qemu) qququiquit
 
 Testing: -drive file.filename=file:TEST_DIR/t.qcow2
-QEMU_PROG: -drive file.filename=file:TEST_DIR/t.qcow2: could not open disk image ide0-hd0: Could not open 'file:TEST_DIR/t.qcow2': No such file or directory
+QEMU_PROG: -drive file.filename=file:TEST_DIR/t.qcow2: Could not open 'file:TEST_DIR/t.qcow2': No such file or directory
 
 
 === Snapshot mode ===
diff --git a/tests/qemu-iotests/087.out b/tests/qemu-iotests/087.out
index 91f4ea1a8b..0ba2e43b40 100644
--- a/tests/qemu-iotests/087.out
+++ b/tests/qemu-iotests/087.out
@@ -21,9 +21,9 @@ QMP_VERSION
 {"return": {}}
 {"error": {"class": "GenericError", "desc": "Device with id 'disk' already exists"}}
 {"error": {"class": "GenericError", "desc": "Device name 'test-node' conflicts with an existing node name"}}
-{"error": {"class": "GenericError", "desc": "could not open disk image disk2: node-name=disk is conflicting with a device id"}}
-{"error": {"class": "GenericError", "desc": "could not open disk image disk2: Duplicate node name"}}
-{"error": {"class": "GenericError", "desc": "could not open disk image disk3: node-name=disk3 is conflicting with a device id"}}
+{"error": {"class": "GenericError", "desc": "node-name=disk is conflicting with a device id"}}
+{"error": {"class": "GenericError", "desc": "Duplicate node name"}}
+{"error": {"class": "GenericError", "desc": "node-name=disk3 is conflicting with a device id"}}
 {"return": {}}
 {"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "SHUTDOWN"}
 {"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "DEVICE_TRAY_MOVED", "data": {"device": "ide1-cd0", "tray-open": true}}
@@ -57,7 +57,7 @@ QMP_VERSION
 Testing:
 QMP_VERSION
 {"return": {}}
-{"error": {"class": "GenericError", "desc": "could not open disk image disk: Guest must be stopped for opening of encrypted image"}}
+{"error": {"class": "GenericError", "desc": "Guest must be stopped for opening of encrypted image"}}
 {"return": {}}
 {"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "SHUTDOWN"}
 {"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "DEVICE_TRAY_MOVED", "data": {"device": "ide1-cd0", "tray-open": true}}