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qemu-nbd: Minor texi updates

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- Change some spacing.
- Add disconnect usage to synopsis.
- Highlight the command and its options in the synopsis.
- Fix up the grammar in the description.
- Move filename variable description out of the option table.
- Add a description of the dev variable.
- Remove duplicate entry for --format.
- Reword --discard documentation.
- Add --detect-zeroes documentation.
- Add reference to qemu man page to see also section.

Signed-off-by: Sitsofe Wheeler <sitsofe@yahoo.com>
Message-Id: <1451979212-25479-3-git-send-email-sitsofe@yahoo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sitsofe Wheeler 2016-01-05 07:33:31 +00:00 committed by Paolo Bonzini
parent b9dbb61757
commit 7e8911bb40
1 changed files with 22 additions and 12 deletions
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34
qemu-nbd.texi
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@ -1,19 +1,23 @@
@example
@c man begin SYNOPSIS
usage: qemu-nbd [OPTION]... @var{filename}
@command{qemu-nbd} [OPTION]... @var{filename}
@command{qemu-nbd} @option{-d} @var{dev}
@c man end
@end example
@c man begin DESCRIPTION
Export QEMU disk image using NBD protocol.
Export a QEMU disk image using the NBD protocol.
@c man end
@c man begin OPTIONS
@var{filename} is a disk image filename.
@var{dev} is an NBD device.
@table @option
@item @var{filename}
is a disk image filename
@item -p, --port=@var{port}
port to listen on (default @samp{10809})
@item -o, --offset=@var{offset}
@ -22,8 +26,9 @@ offset into the image
interface to bind to (default @samp{0.0.0.0})
@item -k, --socket=@var{path}
Use a unix socket with path @var{path}
@item -f, --format=@var{format}
Set image format as @var{format}
@item -f, --format=@var{fmt}
force the use of the block driver for format @var{fmt} instead of
auto-detecting
@item -r, --read-only
export read-only
@item -P, --partition=@var{num}
@ -44,17 +49,22 @@ the emulator's @code{-drive cache=...} option for allowed values.
choose asynchronous I/O mode between @samp{threads} (the default)
and @samp{native} (Linux only).
@item --discard=@var{discard}
toggles whether @dfn{discard} (also known as @dfn{trim} or @dfn{unmap})
requests are ignored or passed to the filesystem. The default is no
(@samp{--discard=ignore}).
controls whether @dfn{discard} (also known as @dfn{trim} or @dfn{unmap})
requests are ignored or passed to the filesystem. @var{discard} is one of
@samp{ignore} (or @samp{off}), @samp{unmap} (or @samp{on}). The default is
@samp{ignore}.
@item --detect-zeroes=@var{detect-zeroes}
enables the automatic conversion of plain zero writes by the OS to
driver-specific optimized zero write commands. @var{detect-zeroes} is one of
@samp{off}, @samp{on} or @samp{unmap}. @samp{unmap}
converts a zero write to an unmap operation and can only be used if
@var{discard} is set to @samp{unmap}. The default is @samp{off}.
@item -c, --connect=@var{dev}
connect @var{filename} to NBD device @var{dev}
@item -d, --disconnect
disconnect the specified device
@item -e, --shared=@var{num}
device can be shared by @var{num} clients (default @samp{1})
@item -f, --format=@var{fmt}
force block driver for format @var{fmt} instead of auto-detecting
@item -t, --persistent
don't exit on the last connection
@item -v, --verbose
@ -79,7 +89,7 @@ warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
@c man end
@c man begin SEEALSO
qemu-img(1)
qemu(1), qemu-img(1)
@c man end
@end ignore