From 267e29969f1e835db7a3fb7d5f9e9befe6e8dcad Mon Sep 17 00:00:00 2001 From: Max Reitz Date: Mon, 18 Jun 2018 14:59:40 +0200 Subject: [PATCH 067/268] qemu-img: Add print_amend_option_help() RH-Author: Max Reitz Message-id: <20180618145943.4489-5-mreitz@redhat.com> Patchwork-id: 80753 O-Subject: [RHV-7.6 qemu-kvm-rhev PATCH 4/7] qemu-img: Add print_amend_option_help() Bugzilla: 1537956 RH-Acked-by: John Snow RH-Acked-by: Kevin Wolf RH-Acked-by: Stefan Hajnoczi The more generic print_block_option_help() function is not really suitable for qemu-img amend, for a couple of reasons: (1) We do not need to append the protocol-level options, as amendment happens only on one node and does not descend downwards to its children. (2) print_block_option_help() says those options are "supported". For option amendment, we do not really know that. So this new function explicitly says that those options are the creation options, and not all of them may be supported. (3) If the driver does not support option amendment, we should not print anything (except for an error message that amendment is not supported). Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1537956 Signed-off-by: Max Reitz Reviewed-by: John Snow Reviewed-by: Eric Blake Message-id: 20180509210023.20283-5-mreitz@redhat.com Signed-off-by: Max Reitz (cherry picked from commit 51641351420e4f9dc6613d0dd03a5f0f214ed5b6) Signed-off-by: Max Reitz Signed-off-by: Miroslav Rezanina --- qemu-img.c | 30 ++++++++++++++++++++++++++++-- tests/qemu-iotests/082.out | 44 +++++++++++++++++++++++++++----------------- 2 files changed, 55 insertions(+), 19 deletions(-) diff --git a/qemu-img.c b/qemu-img.c index cdeb01b..d4cbb63 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -3609,6 +3609,32 @@ static void amend_status_cb(BlockDriverState *bs, qemu_progress_print(100.f * offset / total_work_size, 0); } +static int print_amend_option_help(const char *format) +{ + BlockDriver *drv; + + /* Find driver and parse its options */ + drv = bdrv_find_format(format); + if (!drv) { + error_report("Unknown file format '%s'", format); + return 1; + } + + if (!drv->bdrv_amend_options) { + error_report("Format driver '%s' does not support option amendment", + format); + return 1; + } + + /* Every driver supporting amendment must have create_opts */ + assert(drv->create_opts); + + printf("Creation options for '%s':\n", format); + qemu_opts_print_help(drv->create_opts); + printf("\nNote that not all of these options may be amendable.\n"); + return 0; +} + static int img_amend(int argc, char **argv) { Error *err = NULL; @@ -3708,7 +3734,7 @@ static int img_amend(int argc, char **argv) if (fmt && has_help_option(options)) { /* If a format is explicitly specified (and possibly no filename is * given), print option help here */ - ret = print_block_option_help(filename, fmt); + ret = print_amend_option_help(fmt); goto out; } @@ -3737,7 +3763,7 @@ static int img_amend(int argc, char **argv) if (has_help_option(options)) { /* If the format was auto-detected, print option help here */ - ret = print_block_option_help(filename, fmt); + ret = print_amend_option_help(fmt); goto out; } diff --git a/tests/qemu-iotests/082.out b/tests/qemu-iotests/082.out index 1527fbe..4e52dce 100644 --- a/tests/qemu-iotests/082.out +++ b/tests/qemu-iotests/082.out @@ -546,7 +546,7 @@ cluster_size: 65536 === amend: help for -o === Testing: amend -f qcow2 -o help TEST_DIR/t.qcow2 -Supported options: +Creation options for 'qcow2': size Virtual disk size compat Compatibility level (0.10 or 1.1) backing_file File name of a base image @@ -564,10 +564,11 @@ cluster_size qcow2 cluster size preallocation Preallocation mode (allowed values: off, metadata, falloc, full) lazy_refcounts Postpone refcount updates refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + +Note that not all of these options may be amendable. Testing: amend -f qcow2 -o ? TEST_DIR/t.qcow2 -Supported options: +Creation options for 'qcow2': size Virtual disk size compat Compatibility level (0.10 or 1.1) backing_file File name of a base image @@ -585,10 +586,11 @@ cluster_size qcow2 cluster size preallocation Preallocation mode (allowed values: off, metadata, falloc, full) lazy_refcounts Postpone refcount updates refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + +Note that not all of these options may be amendable. Testing: amend -f qcow2 -o cluster_size=4k,help TEST_DIR/t.qcow2 -Supported options: +Creation options for 'qcow2': size Virtual disk size compat Compatibility level (0.10 or 1.1) backing_file File name of a base image @@ -606,10 +608,11 @@ cluster_size qcow2 cluster size preallocation Preallocation mode (allowed values: off, metadata, falloc, full) lazy_refcounts Postpone refcount updates refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + +Note that not all of these options may be amendable. Testing: amend -f qcow2 -o cluster_size=4k,? TEST_DIR/t.qcow2 -Supported options: +Creation options for 'qcow2': size Virtual disk size compat Compatibility level (0.10 or 1.1) backing_file File name of a base image @@ -627,10 +630,11 @@ cluster_size qcow2 cluster size preallocation Preallocation mode (allowed values: off, metadata, falloc, full) lazy_refcounts Postpone refcount updates refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + +Note that not all of these options may be amendable. Testing: amend -f qcow2 -o help,cluster_size=4k TEST_DIR/t.qcow2 -Supported options: +Creation options for 'qcow2': size Virtual disk size compat Compatibility level (0.10 or 1.1) backing_file File name of a base image @@ -648,10 +652,11 @@ cluster_size qcow2 cluster size preallocation Preallocation mode (allowed values: off, metadata, falloc, full) lazy_refcounts Postpone refcount updates refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + +Note that not all of these options may be amendable. Testing: amend -f qcow2 -o ?,cluster_size=4k TEST_DIR/t.qcow2 -Supported options: +Creation options for 'qcow2': size Virtual disk size compat Compatibility level (0.10 or 1.1) backing_file File name of a base image @@ -669,10 +674,11 @@ cluster_size qcow2 cluster size preallocation Preallocation mode (allowed values: off, metadata, falloc, full) lazy_refcounts Postpone refcount updates refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + +Note that not all of these options may be amendable. Testing: amend -f qcow2 -o cluster_size=4k -o help TEST_DIR/t.qcow2 -Supported options: +Creation options for 'qcow2': size Virtual disk size compat Compatibility level (0.10 or 1.1) backing_file File name of a base image @@ -690,10 +696,11 @@ cluster_size qcow2 cluster size preallocation Preallocation mode (allowed values: off, metadata, falloc, full) lazy_refcounts Postpone refcount updates refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + +Note that not all of these options may be amendable. Testing: amend -f qcow2 -o cluster_size=4k -o ? TEST_DIR/t.qcow2 -Supported options: +Creation options for 'qcow2': size Virtual disk size compat Compatibility level (0.10 or 1.1) backing_file File name of a base image @@ -711,7 +718,8 @@ cluster_size qcow2 cluster size preallocation Preallocation mode (allowed values: off, metadata, falloc, full) lazy_refcounts Postpone refcount updates refcount_bits Width of a reference count entry in bits -nocow Turn off copy-on-write (valid only on btrfs) + +Note that not all of these options may be amendable. Testing: amend -f qcow2 -o backing_file=TEST_DIR/t.qcow2,,help TEST_DIR/t.qcow2 @@ -731,7 +739,7 @@ Testing: amend -f qcow2 -o backing_file=TEST_DIR/t.qcow2 -o ,, -o help TEST_DIR/ qemu-img: Invalid option list: ,, Testing: amend -f qcow2 -o help -Supported options: +Creation options for 'qcow2': size Virtual disk size compat Compatibility level (0.10 or 1.1) backing_file File name of a base image @@ -750,6 +758,8 @@ preallocation Preallocation mode (allowed values: off, metadata, falloc, full lazy_refcounts Postpone refcount updates refcount_bits Width of a reference count entry in bits +Note that not all of these options may be amendable. + Testing: convert -o help Supported options: size Virtual disk size -- 1.8.3.1