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nbd: correctly propagate errors

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Before:
    $ ./qemu-io-old
    qemu-io-old> open -r -o file.driver=nbd
    one of path and host must be specified.
    qemu-io-old: can't open device (null): Could not open image: Invalid argument
    $ ./qemu-io-old
    qemu-io-old> open -r -o file.driver=nbd,file.host=foo,file.path=bar
    path and host may not be used at the same time.
    qemu-io-old: can't open device (null): Could not open image: Invalid argument

After:
    $ ./qemu-io
    qemu-io> open -r -o file.driver=nbd
    qemu-io: can't open device (null): one of path and host must be specified.
    $ ./qemu-io
    qemu-io> open -r -o file.driver=nbd,file.host=foo,file.path=bar
    qemu-io: can't open device (null): path and host may not be used at the same time.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Paolo Bonzini 2014-02-17 14:43:49 +01:00 • committed by Kevin Wolf
parent a69d9af449
commit 77e8b9ca64
4 changed files with 18 additions and 35 deletions
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1
include/block/nbd.h
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@ -64,7 +64,6 @@ enum {
ssize_t nbd_wr_sync(int fd, void *buffer, size_t size, bool do_read);
int tcp_socket_incoming(const char *address, uint16_t port);
int tcp_socket_incoming_spec(const char *address_and_port);
int tcp_socket_outgoing_opts(QemuOpts *opts);
int unix_socket_outgoing(const char *path);
int unix_socket_incoming(const char *path);