From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=52157 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PTeNE-0001h0-EE for qemu-devel@nongnu.org; Fri, 17 Dec 2010 12:46:28 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PTeM7-00035Q-Dx for qemu-devel@nongnu.org; Fri, 17 Dec 2010 12:45:43 -0500 Received: from mx1.redhat.com ([209.132.183.28]:8191) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PTeM7-00035L-1z for qemu-devel@nongnu.org; Fri, 17 Dec 2010 12:44:35 -0500 From: Kevin Wolf Date: Fri, 17 Dec 2010 18:44:34 +0100 Message-Id: <1292607893-13461-20-git-send-email-kwolf@redhat.com> In-Reply-To: <1292607893-13461-1-git-send-email-kwolf@redhat.com> References: <1292607893-13461-1-git-send-email-kwolf@redhat.com> Subject: [Qemu-devel] [PATCH 19/38] qemu-img.c: Re-factor img_create() List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: anthony@codemonkey.ws Cc: kwolf@redhat.com, qemu-devel@nongnu.org From: Jes Sorensen This patch re-factors img_create() moving the code doing the actual work into block.c where it can be shared with QEMU. This is needed to be able to create images from QEMU to be used for live snapshots. Signed-off-by: Jes Sorensen Signed-off-by: Kevin Wolf --- block.c | 141 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ block.h | 4 ++ qemu-img.c | 108 +--------------------------------------------- 3 files changed, 147 insertions(+), 106 deletions(-) diff --git a/block.c b/block.c index b4aaf41..a48b30c 100644 --- a/block.c +++ b/block.c @@ -2758,3 +2758,144 @@ int64_t bdrv_get_dirty_count(BlockDriverState *bs) { return bs->dirty_count; } + +int bdrv_img_create(const char *filename, const char *fmt, + const char *base_filename, const char *base_fmt, + char *options, uint64_t img_size, int flags) +{ + QEMUOptionParameter *param = NULL, *create_options = NULL; + QEMUOptionParameter *backing_fmt; + BlockDriverState *bs = NULL; + BlockDriver *drv, *proto_drv; + int ret = 0; + + /* Find driver and parse its options */ + drv = bdrv_find_format(fmt); + if (!drv) { + error_report("Unknown file format '%s'", fmt); + ret = -1; + goto out; + } + + proto_drv = bdrv_find_protocol(filename); + if (!proto_drv) { + error_report("Unknown protocol '%s'", filename); + ret = -1; + goto out; + } + + create_options = append_option_parameters(create_options, + drv->create_options); + create_options = append_option_parameters(create_options, + proto_drv->create_options); + + /* Create parameter list with default values */ + param = parse_option_parameters("", create_options, param); + + set_option_parameter_int(param, BLOCK_OPT_SIZE, img_size); + + /* Parse -o options */ + if (options) { + param = parse_option_parameters(options, create_options, param); + if (param == NULL) { + error_report("Invalid options for file format '%s'.", fmt); + ret = -1; + goto out; + } + } + + if (base_filename) { + if (set_option_parameter(param, BLOCK_OPT_BACKING_FILE, + base_filename)) { + error_report("Backing file not supported for file format '%s'", + fmt); + ret = -1; + goto out; + } + } + + if (base_fmt) { + if (set_option_parameter(param, BLOCK_OPT_BACKING_FMT, base_fmt)) { + error_report("Backing file format not supported for file " + "format '%s'", fmt); + ret = -1; + goto out; + } + } + + backing_fmt = get_option_parameter(param, BLOCK_OPT_BACKING_FMT); + if (backing_fmt && backing_fmt->value.s) { + if (!bdrv_find_format(backing_fmt->value.s)) { + error_report("Unknown backing file format '%s'", + backing_fmt->value.s); + ret = -1; + goto out; + } + } + + // The size for the image must always be specified, with one exception: + // If we are using a backing file, we can obtain the size from there + if (get_option_parameter(param, BLOCK_OPT_SIZE)->value.n == -1) { + QEMUOptionParameter *backing_file = + get_option_parameter(param, BLOCK_OPT_BACKING_FILE); + + if (backing_file && backing_file->value.s) { + uint64_t size; + const char *fmt = NULL; + char buf[32]; + + if (backing_fmt && backing_fmt->value.s) { + fmt = backing_fmt->value.s; + } + + bs = bdrv_new(""); + + ret = bdrv_open(bs, backing_file->value.s, flags, drv); + if (ret < 0) { + error_report("Could not open '%s'", filename); + ret = -1; + goto out; + } + bdrv_get_geometry(bs, &size); + size *= 512; + + snprintf(buf, sizeof(buf), "%" PRId64, size); + set_option_parameter(param, BLOCK_OPT_SIZE, buf); + } else { + error_report("Image creation needs a size parameter"); + ret = -1; + goto out; + } + } + + printf("Formatting '%s', fmt=%s ", filename, fmt); + print_option_parameters(param); + puts(""); + + ret = bdrv_create(drv, filename, param); + + if (ret < 0) { + if (ret == -ENOTSUP) { + error_report("Formatting or formatting option not supported for " + "file format '%s'", fmt); + } else if (ret == -EFBIG) { + error_report("The image size is too large for file format '%s'", + fmt); + } else { + error_report("%s: error while creating %s: %s", filename, fmt, + strerror(-ret)); + } + } + +out: + free_option_parameters(create_options); + free_option_parameters(param); + + if (bs) { + bdrv_delete(bs); + } + if (ret) { + return 1; + } + return 0; +} diff --git a/block.h b/block.h index 78ecfac..b812172 100644 --- a/block.h +++ b/block.h @@ -227,6 +227,10 @@ int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf, int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf, int64_t pos, int size); +int bdrv_img_create(const char *filename, const char *fmt, + const char *base_filename, const char *base_fmt, + char *options, uint64_t img_size, int flags); + #define BDRV_SECTORS_PER_DIRTY_CHUNK 2048 void bdrv_set_dirty_tracking(BlockDriverState *bs, int enable); diff --git a/qemu-img.c b/qemu-img.c index f576cfb..0ff179f 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -288,9 +288,6 @@ static int img_create(int argc, char **argv) const char *base_fmt = NULL; const char *filename; const char *base_filename = NULL; - BlockDriver *drv, *proto_drv; - QEMUOptionParameter *param = NULL, *create_options = NULL; - QEMUOptionParameter *backing_fmt = NULL; char *options = NULL; for(;;) { @@ -351,110 +348,9 @@ static int img_create(int argc, char **argv) goto out; } - /* Find driver and parse its options */ - drv = bdrv_find_format(fmt); - if (!drv) { - error("Unknown file format '%s'", fmt); - ret = -1; - goto out; - } - - proto_drv = bdrv_find_protocol(filename); - if (!proto_drv) { - error("Unknown protocol '%s'", filename); - ret = -1; - goto out; - } - - create_options = append_option_parameters(create_options, - drv->create_options); - create_options = append_option_parameters(create_options, - proto_drv->create_options); - - /* Create parameter list with default values */ - param = parse_option_parameters("", create_options, param); - - set_option_parameter_int(param, BLOCK_OPT_SIZE, img_size); - - /* Parse -o options */ - if (options) { - param = parse_option_parameters(options, create_options, param); - if (param == NULL) { - error("Invalid options for file format '%s'.", fmt); - ret = -1; - goto out; - } - } - - /* Add old-style options to parameters */ - ret = add_old_style_options(fmt, param, base_filename, base_fmt); - if (ret < 0) { - goto out; - } - - backing_fmt = get_option_parameter(param, BLOCK_OPT_BACKING_FMT); - if (backing_fmt && backing_fmt->value.s) { - if (!bdrv_find_format(backing_fmt->value.s)) { - error("Unknown backing file format '%s'", - backing_fmt->value.s); - ret = -1; - goto out; - } - } - - // The size for the image must always be specified, with one exception: - // If we are using a backing file, we can obtain the size from there - if (get_option_parameter(param, BLOCK_OPT_SIZE)->value.n == -1) { - - QEMUOptionParameter *backing_file = - get_option_parameter(param, BLOCK_OPT_BACKING_FILE); - - if (backing_file && backing_file->value.s) { - BlockDriverState *bs; - uint64_t size; - const char *fmt = NULL; - char buf[32]; - - if (backing_fmt && backing_fmt->value.s) { - fmt = backing_fmt->value.s; - } - - bs = bdrv_new_open(backing_file->value.s, fmt, BDRV_O_FLAGS); - if (!bs) { - ret = -1; - goto out; - } - bdrv_get_geometry(bs, &size); - size *= 512; - bdrv_delete(bs); - - snprintf(buf, sizeof(buf), "%" PRId64, size); - set_option_parameter(param, BLOCK_OPT_SIZE, buf); - } else { - error("Image creation needs a size parameter"); - ret = -1; - goto out; - } - } - - printf("Formatting '%s', fmt=%s ", filename, fmt); - print_option_parameters(param); - puts(""); - - ret = bdrv_create(drv, filename, param); - - if (ret < 0) { - if (ret == -ENOTSUP) { - error("Formatting or formatting option not supported for file format '%s'", fmt); - } else if (ret == -EFBIG) { - error("The image size is too large for file format '%s'", fmt); - } else { - error("%s: error while creating %s: %s", filename, fmt, strerror(-ret)); - } - } + ret = bdrv_img_create(filename, fmt, base_filename, base_fmt, + options, img_size, BDRV_O_FLAGS); out: - free_option_parameters(create_options); - free_option_parameters(param); if (ret) { return 1; } -- 1.7.2.3