Document changes in qemu-img interface

Update the documentation to reflect the introduction of format specific options with -o. Don't advertise -e or -6 any more, they exist only for compatibility reasons and can be replaced by the corresponding -o options. Signed-off-by: Kevin Wolf <kwolf@redhat.com>

Document changes in qemu-img interface
Update the documentation to reflect the introduction of format specific options with -o. Don't advertise -e or -6 any more, they exist only for compatibility reasons and can be replaced by the corresponding -o options. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Kevin Wolf · Blue Swirl
1 parent db08adf5
Showing 2 changed files with 23 additions and 18 deletions
qemu-img.c
qemu-img.texi
@@ -59,9 +59,9 @@ static void help(void)
            "\n"
            "Command syntax:\n"
            "  check [-f fmt] filename\n"
-           "  create [-e] [-6] [-F fmt] [-b base_image] [-f fmt] filename [size]\n"
+           "  create [-F fmt] [-b base_image] [-f fmt] [-o options] filename [size]\n"
            "  commit [-f fmt] filename\n"
-           "  convert [-c] [-e] [-6] [-f fmt] [-O output_fmt] [-B output_base_image] filename [filename2 [...]] output_filename\n"
+           "  convert [-c] [-f fmt] [-O output_fmt] [-o options] [-B output_base_image] filename [filename2 [...]] output_filename\n"
            "  info [-f fmt] filename\n"
            "  snapshot [-l | -a snapshot | -c snapshot | -d snapshot] filename\n"
            "\n"
@@ -79,9 +79,10 @@ static void help(void)
            "    supported any 'k' or 'K' is ignored\n"
            "  'output_filename' is the destination disk image filename\n"
            "  'output_fmt' is the destination format\n"
+           "  'options' is a comma separated list of format specific options in a\n"
+           "    name=value format. Use -o ? for an overview of the options supported by the\n"
+           "    used format\n"
            "  '-c' indicates that target image must be compressed (qcow format only)\n"
-           "  '-e' indicates that the target image must be encrypted (qcow format only)\n"
-           "  '-6' indicates that the target image must use compatibility level 6 (vmdk format only)\n"
            "  '-h' with or without a command shows this help and lists the supported formats\n"
            "\n"
            "Parameters to snapshot subcommand:\n"
@@ -8,9 +8,9 @@ usage: qemu-img command [command options]
  
 The following commands are supported:
 @table @option
-@item create [-e] [-6] [-F @var{base_fmt}] [-b @var{base_image}] [-f @var{fmt}] @var{filename} [@var{size}]
+@item create [-F @var{base_fmt}] [-b @var{base_image}] [-f @var{fmt}] [-o @var{options}] @var{filename} [@var{size}]
 @item commit [-f @var{fmt}] @var{filename}
-@item convert [-c] [-e] [-6] [-f @var{fmt}] [-O @var{output_fmt}] [-B @var{output_base_image}] @var{filename} [@var{filename2} [...]] @var{output_filename}
+@item convert [-c] [-f @var{fmt}] [-O @var{output_fmt}] [-o @var{options}] [-B @var{output_base_image}] @var{filename} [@var{filename2} [...]] @var{output_filename}
 @item info [-f @var{fmt}] @var{filename}
 @item snapshot [-l | -a @var{snapshot} | -c @var{snapshot} | -d @var{snapshot}] @var{filename}
 @end table
@@ -61,22 +61,23 @@ CD-ROM images present for example in the Knoppix CD-ROMs.
 @end table
  
 @item size
-is the disk image size in kilobytes. Optional suffixes @code{M}
-(megabyte, 1024 * 1024) and @code{G} (gigabyte, 1024 * 1024 * 1024)
-are supported and any @code{k} or @code{K} is ignored.
+is the disk image size in bytes. Optional suffixes @code{k} or @code{K}
+(kilobyte, 1024) @code{M} (megabyte, 1024k) and @code{G} (gigabyte, 1024M)
+and T (terabyte, 1024G) are supported.  @code{b} is ignored.
  
 @item output_filename
 is the destination disk image filename
  
 @item output_fmt
  is the destination format
+@item options
+is a comma separated list of format specific options in a
+name=value format. Use @code{-o ?} for an overview of the options supported
+by the used format
+
  
 @item -c
 indicates that target image must be compressed (qcow format only)
-@item -e
-indicates that the target image must be encrypted (qcow format only)
-@item -6
-indicates that the target image must use compatibility level 6 (vmdk format only)
 @item -h
 with or without a command shows help and lists the supported formats
 @end table
@@ -100,7 +101,7 @@ lists all snapshots in the given image
 Command description:
  
 @table @option
-@item create [-6] [-e] [-b @var{base_image}] [-f @var{fmt}] @var{filename} [@var{size}]
+@item create [-F @var{base_fmt}] [-b @var{base_image}] [-f @var{fmt}] [-o @var{options}] @var{filename} [@var{size}]
  
 Create the new disk image @var{filename} of size @var{size} and format
 @var{fmt}.
@@ -110,17 +111,20 @@ differences from @var{base_image}. No size needs to be specified in
 this case. @var{base_image} will never be modified unless you use the
 @code{commit} monitor command.
  
+The size can also be specified using the @var{size} option with @code{-o},
+it doesn't need to be specified separately in this case.
+
 @item commit [-f @var{fmt}] @var{filename}
  
 Commit the changes recorded in @var{filename} in its base image.
  
-@item convert [-c] [-e] [-f @var{fmt}] @var{filename} [-O @var{output_fmt}] @var{output_filename}
+@item convert [-c] [-f @var{fmt}] [-O @var{output_fmt}] [-o @var{options}] [-B @var{output_base_image}] @var{filename} [@var{filename2} [...]] @var{output_filename}
  
 Convert the disk image @var{filename} to disk image @var{output_filename}
-using format @var{output_fmt}. It can be optionally encrypted
-(@code{-e} option) or compressed (@code{-c} option).
+using format @var{output_fmt}. It can be optionally compressed (@code{-c}
+option) or use any format specific options like encryption (@code{-o} option).
  
-Only the format @code{qcow} supports encryption or compression. The
+Only the formats @code{qcow} and @code{qcow2} support encryption or compression. The
 compression is read-only. It means that if a compressed sector is
 rewritten, then it is rewritten as uncompressed data.