Fam Zheng b04b6b6ec3 block: Print its file name if backing file opening failed ...

If backing file doesn't exist, the error message is confusing and
misleading:

    $ qemu /tmp/a.qcow2
    qemu: could not open disk image /tmp/a.qcow2: Could not open file: No
    such file or directory

But...

    $ ls /tmp/a.qcow2
    /tmp/a.qcow2

    $ qemu-img info /tmp/a.qcow2
    image: /tmp/a.qcow2
    file format: qcow2
    virtual size: 8.0G (8589934592 bytes)
    disk size: 196K
    cluster_size: 65536
    backing file: /tmp/b.qcow2

Because...

    $ ls /tmp/b.qcow2
    ls: cannot access /tmp/b.qcow2: No such file or directory

This is not intuitive. It's better to have the missing file's name in
the error message. With this patch:

    $ qemu-io -c 'read 0 512' /tmp/a.qcow2
    qemu-io: can't open device /tmp/a.qcow2: Could not open backing
    file: Could not open '/stor/vm/arch.raw': No such file or directory
    no file open, try 'help open'

Which is a little bit better.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

2013-11-14 13:09:06 +01:00

..

backup.c

qapi: make use of new BlockJobType

2013-10-11 10:52:54 +02:00

blkdebug.c

blkdebug: Employ error parameter

2013-10-11 16:50:00 +02:00

blkverify.c

blkverify: Employ error parameter

2013-10-11 16:50:00 +02:00

bochs.c

bdrv: Use "Error" for opening images

2013-09-12 10:12:47 +02:00

cloop.c

bdrv: Use "Error" for opening images

2013-09-12 10:12:47 +02:00

commit.c

qapi: make use of new BlockJobType

2013-10-11 10:52:54 +02:00

cow.c

block: Error parameter for create functions

2013-09-12 10:12:48 +02:00

curl.c

bdrv: Use "Error" for opening images

2013-09-12 10:12:47 +02:00

dmg.c

bdrv: Use "Error" for opening images

2013-09-12 10:12:47 +02:00

gluster.c

block: introduce BlockDriver.bdrv_needs_filename to enable some drivers.

2013-09-25 16:21:28 +02:00

iscsi.c

misc: New spelling fixes in comments

2013-10-26 13:01:57 +04:00

linux-aio.c

aio: drop io_flush argument

2013-08-19 15:52:19 +02:00

Makefile.objs

block: vhdx - log parsing, replay, and flush support

2013-11-07 13:58:58 +01:00

mirror.c

qapi: make use of new BlockJobType

2013-10-11 10:52:54 +02:00

nbd.c

bdrv: Use "Error" for opening images

2013-09-12 10:12:47 +02:00

parallels.c

bdrv: Use "Error" for opening images

2013-09-12 10:12:47 +02:00

qapi.c

block/qapi: Human-readable ImageInfoSpecific dump

2013-10-11 10:52:54 +02:00

qcow2-cache.c

qcow2: Use negated overflow check mask

2013-10-11 16:50:00 +02:00

qcow2-cluster.c

bswap.h: Remove cpu_to_be64wu()

2013-11-05 19:57:47 -08:00

qcow2-refcount.c

qcow2: Make overlap check mask variable

2013-10-11 16:50:00 +02:00

qcow2-snapshot.c

qcow2: Use negated overflow check mask

2013-10-11 16:50:00 +02:00

qcow2.c

qcow2: Flush image after creation

2013-10-28 17:34:32 +01:00

qcow2.h

qcow2: Add more overlap check bitmask macros

2013-10-11 16:50:00 +02:00

qcow.c

block: Error parameter for create functions

2013-09-12 10:12:48 +02:00

qed-check.c

…

qed-cluster.c

…

qed-gencb.c

…

qed-l2-cache.c

…

qed-table.c

misc: move include files to include/qemu/

2012-12-19 08:32:39 +01:00

qed.c

block: Error parameter for create functions

2013-09-12 10:12:48 +02:00

qed.h

block: qed - use QEMU_PACKED for on-disk structures

2013-09-25 20:51:15 +02:00

raw_bsd.c

block: Avoid unecessary drv->bdrv_getlength() calls

2013-10-29 13:10:26 +01:00

raw-aio.h

block: make discard asynchronous

2013-01-15 10:03:47 +01:00

raw-posix.c

block: Print its file name if backing file opening failed

2013-11-14 13:09:06 +01:00

raw-win32.c

block: Print its file name if backing file opening failed

2013-11-14 13:09:06 +01:00

rbd.c

rbd: avoid qemu_rbd_snap_list() memory leaks

2013-09-25 16:22:00 +02:00

sheepdog.c

sheepdog: check simultaneous create in resend_aioreq

2013-10-30 12:22:24 +01:00

snapshot.c

bdrv: Use "Error" for opening images

2013-09-12 10:12:47 +02:00

ssh.c

bdrv: Use "Error" for creating images

2013-09-12 10:12:48 +02:00

stream.c

qapi: make use of new BlockJobType

2013-10-11 10:52:54 +02:00

vdi.c

block: vdi - use QEMU_PACKED for on-disk structures

2013-09-25 20:51:05 +02:00

vhdx-endian.c

block: vhdx - move more endian translations to vhdx-endian.c

2013-11-07 13:58:59 +01:00

vhdx-log.c

block: vhdx - add log write support

2013-11-07 13:58:59 +01:00

vhdx.c

block: vhdx - add .bdrv_create() support

2013-11-07 13:58:59 +01:00

vhdx.h

block: vhdx - add .bdrv_create() support

2013-11-07 13:58:59 +01:00

vmdk.c

vmdk: Implment bdrv_get_specific_info

2013-10-31 14:44:43 +01:00

vpc.c

block/vpc: fix virtual size for images created with disk2vhd

2013-11-07 13:58:58 +01:00

vvfat.c

block: Error parameter for create functions

2013-09-12 10:12:48 +02:00

win32-aio.c

win32-aio: drop win32_aio_flush_cb()

2013-08-22 22:05:04 +02:00