From patchwork Fri Sep 21 19:50:57 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephen Warren X-Patchwork-Id: 185903 X-Patchwork-Delegate: trini@ti.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from theia.denx.de (theia.denx.de [85.214.87.163]) by ozlabs.org (Postfix) with ESMTP id 364212C0086 for ; Sat, 22 Sep 2012 05:51:43 +1000 (EST) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id C0B122809E; Fri, 21 Sep 2012 21:51:35 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at theia.denx.de Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 86wATM7HLenv; Fri, 21 Sep 2012 21:51:35 +0200 (CEST) Received: from theia.denx.de (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 6834228096; Fri, 21 Sep 2012 21:51:19 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 3519F28085 for ; Fri, 21 Sep 2012 21:51:15 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at theia.denx.de Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id uUN9HixFAyzp for ; Fri, 21 Sep 2012 21:51:13 +0200 (CEST) X-policyd-weight: NOT_IN_SBL_XBL_SPAMHAUS=-1.5 NOT_IN_SPAMCOP=-1.5 NOT_IN_BL_NJABL=-1.5 (only DNSBL check requested) Received: from avon.wwwdotorg.org (avon.wwwdotorg.org [70.85.31.133]) by theia.denx.de (Postfix) with ESMTPS id 0DFA328086 for ; Fri, 21 Sep 2012 21:51:11 +0200 (CEST) Received: from severn.wwwdotorg.org (unknown [192.168.65.5]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by avon.wwwdotorg.org (Postfix) with ESMTPS id 12119636A; Fri, 21 Sep 2012 13:51:48 -0600 (MDT) Received: from localhost.localdomain (localhost [127.0.0.1]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by severn.wwwdotorg.org (Postfix) with ESMTPSA id 95B18E4786; Fri, 21 Sep 2012 13:51:08 -0600 (MDT) From: Stephen Warren To: Tom Rini , Rob Herring Date: Fri, 21 Sep 2012 13:50:57 -0600 Message-Id: <1348257061-4958-2-git-send-email-swarren@wwwdotorg.org> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1348257061-4958-1-git-send-email-swarren@wwwdotorg.org> References: <1348257061-4958-1-git-send-email-swarren@wwwdotorg.org> X-NVConfidentiality: public X-Virus-Scanned: clamav-milter 0.96.5 at avon.wwwdotorg.org X-Virus-Status: Clean Cc: u-boot@lists.denx.de, Stephen Warren , Rob Herring Subject: [U-Boot] [PATCH V4 2/6] disk: get_device_and_partition() "auto" partition and cleanup X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.11 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: u-boot-bounces@lists.denx.de Errors-To: u-boot-bounces@lists.denx.de From: Stephen Warren Rework get_device_and_partition() to: a) Implement a new partition ID of "auto", which requests that U-Boot search for the first "bootable" partition, and fall back to the first valid partition if none is found. This way, users don't need to specify an explicit partition in their commands. b) Make use of get_device(). c) Add parameter to indicate whether returning a whole device is acceptable, or whether a partition is mandatory. d) Make error-checking of the user's device-/partition-specification more complete. In particular, if strtoul() doesn't convert all characters, it's an error rather than just ignored. The resultant device/partition returned by the function will be as follows, based on whether the disk has a partition table (ptable) or not, and whether the calling command allows the whole device to be returned or not. (D and P are integers, P >= 1) D D: No ptable: !allow_whole_dev: error allow_whole_dev: device D ptable: device D partition 1 D:0 !allow_whole_dev: error allow_whole_dev: device D D:P No ptable: error ptable: device D partition P D:auto No ptable: !allow_whole_dev: error allow_whole_dev: device D ptable: first partition in device D with bootable flag set. If none, first valid paratition in device D. Note: In order to review this patch, it's probably easiest to simply look at the file contents post-application, rather than reading the patch itself. Signed-off-by: Rob Herring [swarren: Rob implemented scanning for bootable partitions. I fixed a couple of issues there, switched the syntax to ":auto", added the error-checking rework, and ":0" syntax for the whole device] Signed-off-by: Stephen Warren --- v4: Squashed into Rob's partition-scanning patch. Rebased. v3: New patch. --- common/cmd_disk.c | 2 +- common/cmd_ext4.c | 2 +- common/cmd_ext_common.c | 4 +- common/cmd_fat.c | 8 +- common/cmd_reiser.c | 4 +- common/cmd_zfs.c | 4 +- disk/part.c | 197 ++++++++++++++++++++++++++++++++++++---------- include/part.h | 9 +- 8 files changed, 171 insertions(+), 59 deletions(-) diff --git a/common/cmd_disk.c b/common/cmd_disk.c index 8df9344..ee4e215 100644 --- a/common/cmd_disk.c +++ b/common/cmd_disk.c @@ -54,7 +54,7 @@ int common_diskboot(cmd_tbl_t *cmdtp, const char *intf, int argc, bootstage_mark(BOOTSTAGE_ID_IDE_BOOT_DEVICE); part = get_device_and_partition(intf, (argc == 3) ? argv[2] : NULL, - &dev_desc, &info); + &dev_desc, &info, 1); if (part < 0) { bootstage_error(BOOTSTAGE_ID_IDE_TYPE); return 1; diff --git a/common/cmd_ext4.c b/common/cmd_ext4.c index 48f9ba3..ca46561 100644 --- a/common/cmd_ext4.c +++ b/common/cmd_ext4.c @@ -87,7 +87,7 @@ int do_ext4_write(cmd_tbl_t *cmdtp, int flag, int argc, if (argc < 6) return cmd_usage(cmdtp); - part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info); + part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1); if (part < 0) return 1; diff --git a/common/cmd_ext_common.c b/common/cmd_ext_common.c index 7d26944..1952f4d 100644 --- a/common/cmd_ext_common.c +++ b/common/cmd_ext_common.c @@ -108,7 +108,7 @@ int do_ext_load(cmd_tbl_t *cmdtp, int flag, int argc, return 1; } - part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info); + part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1); if (part < 0) return 1; @@ -166,7 +166,7 @@ int do_ext_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) if (argc < 2) return cmd_usage(cmdtp); - part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info); + part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1); if (part < 0) return 1; diff --git a/common/cmd_fat.c b/common/cmd_fat.c index 90412d6..01e02f5 100644 --- a/common/cmd_fat.c +++ b/common/cmd_fat.c @@ -49,7 +49,7 @@ int do_fat_fsload (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) return 1; } - part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info); + part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1); if (part < 0) return 1; @@ -101,7 +101,7 @@ int do_fat_ls (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) return 0; } - part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info); + part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1); if (part < 0) return 1; @@ -139,7 +139,7 @@ int do_fat_fsinfo (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) return 0; } - part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info); + part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1); if (part < 0) return 1; @@ -175,7 +175,7 @@ static int do_fat_fswrite(cmd_tbl_t *cmdtp, int flag, if (argc < 5) return cmd_usage(cmdtp); - part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info); + part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1); if (part < 0) return 1; diff --git a/common/cmd_reiser.c b/common/cmd_reiser.c index 2865014..e658618 100644 --- a/common/cmd_reiser.c +++ b/common/cmd_reiser.c @@ -57,7 +57,7 @@ int do_reiserls (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) if (argc < 3) return CMD_RET_USAGE; - part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info); + part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1); if (part < 0) return 1; @@ -140,7 +140,7 @@ int do_reiserload (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) return 1; } - part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info); + part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1); if (part < 0) return 1; diff --git a/common/cmd_zfs.c b/common/cmd_zfs.c index 27f8856..d580f7b 100644 --- a/common/cmd_zfs.c +++ b/common/cmd_zfs.c @@ -94,7 +94,7 @@ static int do_zfs_load(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) return 1; } - part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info); + part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1); if (part < 0) return 1; @@ -160,7 +160,7 @@ static int do_zfs_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) if (argc == 4) filename = argv[3]; - part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info); + part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1); if (part < 0) return 1; diff --git a/disk/part.c b/disk/part.c index 0a1b9cb..9916708 100644 --- a/disk/part.c +++ b/disk/part.c @@ -24,6 +24,7 @@ #include #include #include +#include #include #undef PART_DEBUG @@ -457,66 +458,176 @@ int get_device(const char *ifname, const char *dev_str, return dev; } -int get_device_and_partition(const char *ifname, const char *dev_str, +#define PART_UNSPECIFIED -2 +#define PART_AUTO -1 +#define MAX_SEARCH_PARTITIONS 16 +int get_device_and_partition(const char *ifname, const char *dev_part_str, block_dev_desc_t **dev_desc, - disk_partition_t *info) + disk_partition_t *info, int allow_whole_dev) { - int ret; - char *ep; + int ret = -1; + const char *part_str; + char *dup_str = NULL; + const char *dev_str; int dev; - block_dev_desc_t *desc; - int part = 0; - char *part_str; - - if (dev_str) - dev = simple_strtoul(dev_str, &ep, 16); - - if (!dev_str || (dev_str == ep)) { - dev_str = getenv("bootdevice"); - if (dev_str) - dev = simple_strtoul(dev_str, &ep, 16); - if (!dev_str || (dev_str == ep)) - goto err; + char *ep; + int p; + int part; + disk_partition_t tmpinfo; + + /* If no dev_part_str, use bootdevice environment variable */ + if (!dev_part_str) + dev_part_str = getenv("bootdevice"); + + /* If still no dev_part_str, it's an error */ + if (!dev_part_str) { + printf("** No device specified **\n"); + goto cleanup; + } + + /* Separate device and partition ID specification */ + part_str = strchr(dev_part_str, ':'); + if (part_str) { + dup_str = strdup(dev_part_str); + dup_str[part_str - dev_part_str] = 0; + dev_str = dup_str; + part_str++; + } else { + dev_str = dev_part_str; + } + + /* Look up the device */ + dev = get_device(ifname, dev_str, dev_desc); + if (dev < 0) + goto cleanup; + + /* Convert partition ID string to number */ + if (!part_str || !*part_str) { + part = PART_UNSPECIFIED; + } else if (!strcmp(part_str, "auto")) { + part = PART_AUTO; + } else { + /* Something specified -> use exactly that */ + part = (int)simple_strtoul(part_str, &ep, 16); + /* + * Less than whole string converted, + * or request for whole device, but caller requires partition. + */ + if (*ep || (part == 0 && !allow_whole_dev)) { + printf("** Bad partition specification %s %s **\n", + ifname, dev_part_str); + goto cleanup; + } } - desc = get_dev(ifname, dev); - if (!desc || (desc->type == DEV_TYPE_UNKNOWN)) - goto err; + /* + * No partition table on device, + * or user requested partition 0 (entire device). + */ + if (((*dev_desc)->part_type == PART_TYPE_UNKNOWN) || + (part == 0)) { + if (!(*dev_desc)->lba) { + printf("** Bad device size - %s %s **\n", ifname, + dev_str); + goto cleanup; + } - if (desc->part_type == PART_TYPE_UNKNOWN) { - /* disk doesn't use partition table */ - if (!desc->lba) { - printf("**Bad disk size - %s %d:0 **\n", ifname, dev); - return -1; + /* + * If user specified a partition ID other than 0, + * or the calling command only accepts partitions, + * it's an error. + */ + if ((part > 0) || (!allow_whole_dev)) { + printf("** No partition table - %s %s **\n", ifname, + dev_str); + goto cleanup; } + info->start = 0; - info->size = desc->lba; - info->blksz = desc->blksz; + info->size = (*dev_desc)->lba; + info->blksz = (*dev_desc)->blksz; + info->bootable = 0; +#ifdef CONFIG_PARTITION_UUIDS + info->uuid[0] = 0; +#endif - *dev_desc = desc; - return 0; + ret = 0; + goto cleanup; } - part_str = strchr(dev_str, ':'); - if (part_str) - part = (int)simple_strtoul(++part_str, NULL, 16); - - ret = get_partition_info(desc, part, info); - if (ret) { - printf("** Invalid partition %d, use `dev[:part]' **\n", part); - return -1; + /* + * Now there's known to be a partition table, + * not specifying a partition means to pick partition 1. + */ + if (part == PART_UNSPECIFIED) + part = 1; + + /* + * If user didn't specify a partition number, or did specify something + * other than "auto", use that partition number directly. + */ + if (part != PART_AUTO) { + ret = get_partition_info(*dev_desc, part, info); + if (ret) { + printf("** Invalid partition %d **\n", part); + goto cleanup; + } + } else { + /* + * Find the first bootable partition. + * If none are bootable, fall back to the first valid partition. + */ + part = 0; + for (p = 1; p <= MAX_SEARCH_PARTITIONS; p++) { + ret = get_partition_info(*dev_desc, p, info); + if (ret) + continue; + + /* + * First valid partition, or new better partition? + * If so, save partition ID. + */ + if (!part || info->bootable) + part = p; + + /* Best possible partition? Stop searching. */ + if (info->bootable) + break; + + /* + * We now need to search further for best possible. + * If we what we just queried was the best so far, + * save the info since we over-write it next loop. + */ + if (part == p) + tmpinfo = *info; + } + /* If we found any acceptable partition */ + if (part) { + /* + * If we searched all possible partition IDs, + * return the first valid partition we found. + */ + if (p == MAX_SEARCH_PARTITIONS + 1) + *info = tmpinfo; + ret = 0; + } else { + printf("** No valid partitions found **\n"); + goto cleanup; + } } if (strncmp((char *)info->type, BOOT_PART_TYPE, sizeof(info->type)) != 0) { printf("** Invalid partition type \"%.32s\"" " (expect \"" BOOT_PART_TYPE "\")\n", info->type); - return -1; + ret = -1; + goto cleanup; } - *dev_desc = desc; - return part; + ret = part; + goto cleanup; - err: - puts("** Invalid boot device, use `dev[:part]' **\n"); - return -1; +cleanup: + free(dup_str); + return ret; } diff --git a/include/part.h b/include/part.h index 144df4e..3f780a1 100644 --- a/include/part.h +++ b/include/part.h @@ -114,9 +114,9 @@ void init_part (block_dev_desc_t *dev_desc); void dev_print(block_dev_desc_t *dev_desc); int get_device(const char *ifname, const char *dev_str, block_dev_desc_t **dev_desc); -int get_device_and_partition(const char *ifname, const char *dev_str, +int get_device_and_partition(const char *ifname, const char *dev_part_str, block_dev_desc_t **dev_desc, - disk_partition_t *info); + disk_partition_t *info, int allow_whole_dev); #else static inline block_dev_desc_t *get_dev(const char *ifname, int dev) { return NULL; } @@ -137,9 +137,10 @@ static inline int get_device(const char *ifname, const char *dev_str, block_dev_desc_t **dev_desc) { return -1; } static inline int get_device_and_partition(const char *ifname, - const char *dev_str, + const char *dev_part_str, block_dev_desc_t **dev_desc, - disk_partition_t *info) + disk_partition_t *info, + int allow_whole_dev) { *dev_desc = NULL; return -1; } #endif