From ead3330dfadfcb2bd53a136916d4087cc725ef42 Mon Sep 17 00:00:00 2001 From: Joel Granados Moreno Date: Mon, 31 Aug 2009 13:41:06 +0200 Subject: [PATCH 1/3] No BLKPG --- libparted/arch/linux.c | 213 ------------------------------------------------ 1 files changed, 0 insertions(+), 213 deletions(-) diff --git a/libparted/arch/linux.c b/libparted/arch/linux.c index 8f220e0..e47030f 100644 --- a/libparted/arch/linux.c +++ b/libparted/arch/linux.c @@ -41,7 +41,6 @@ #include #endif -#include "blkpg.h" #include "../architecture.h" #include "dirname.h" @@ -587,22 +586,6 @@ _get_linux_version () return kver = KERNEL_VERSION (major, minor, teeny); } -static int -_have_devfs () -{ - static int have_devfs = -1; - struct stat sb; - - if (have_devfs != -1) - return have_devfs; - - /* the presence of /dev/.devfsd implies that DevFS is active */ - if (stat("/dev/.devfsd", &sb) < 0) - return have_devfs = 0; - - return have_devfs = S_ISCHR(sb.st_mode) ? 1 : 0; -} - static void _device_set_sector_size (PedDevice* dev) { @@ -2189,176 +2172,6 @@ linux_partition_is_busy (const PedPartition* part) return 0; } -static int -_blkpg_part_command (PedDevice* dev, struct blkpg_partition* part, int op) -{ - LinuxSpecific* arch_specific = LINUX_SPECIFIC (dev); - struct blkpg_ioctl_arg ioctl_arg; - - ioctl_arg.op = op; - ioctl_arg.flags = 0; - ioctl_arg.datalen = sizeof (struct blkpg_partition); - ioctl_arg.data = (void*) part; - - return ioctl (arch_specific->fd, BLKPG, &ioctl_arg) == 0; -} - -static int -_blkpg_add_partition (PedDisk* disk, const PedPartition *part) -{ - struct blkpg_partition linux_part; - const char* vol_name; - char* dev_name; - - PED_ASSERT(disk != NULL, return 0); - PED_ASSERT(disk->dev->sector_size % PED_SECTOR_SIZE_DEFAULT == 0, - return 0); - - if (ped_disk_type_check_feature (disk->type, - PED_DISK_TYPE_PARTITION_NAME)) - vol_name = ped_partition_get_name (part); - else - vol_name = NULL; - - dev_name = _device_get_part_path (disk->dev, part->num); - if (!dev_name) - return 0; - - memset (&linux_part, 0, sizeof (linux_part)); - linux_part.start = part->geom.start * disk->dev->sector_size; - /* see fs/partitions/msdos.c:msdos_partition(): "leave room for LILO" */ - if (part->type & PED_PARTITION_EXTENDED) - linux_part.length = part->geom.length == 1 ? 512 : 1024; - else - linux_part.length = part->geom.length * disk->dev->sector_size; - linux_part.pno = part->num; - strncpy (linux_part.devname, dev_name, BLKPG_DEVNAMELTH); - if (vol_name) - strncpy (linux_part.volname, vol_name, BLKPG_VOLNAMELTH); - - free (dev_name); - - if (!_blkpg_part_command (disk->dev, &linux_part, - BLKPG_ADD_PARTITION)) { - return ped_exception_throw ( - PED_EXCEPTION_ERROR, - PED_EXCEPTION_IGNORE_CANCEL, - _("Error informing the kernel about modifications to " - "partition %s -- %s. This means Linux won't know " - "about any changes you made to %s until you reboot " - "-- so you shouldn't mount it or use it in any way " - "before rebooting."), - linux_part.devname, - strerror (errno), - linux_part.devname) - == PED_EXCEPTION_IGNORE; - } - - return 1; -} - -static int -_blkpg_remove_partition (PedDisk* disk, int n) -{ - struct blkpg_partition linux_part; - - memset (&linux_part, 0, sizeof (linux_part)); - linux_part.pno = n; - return _blkpg_part_command (disk->dev, &linux_part, - BLKPG_DEL_PARTITION); -} - -/* - * The number of partitions that a device can have depends on the kernel. - * If we don't find this value in /sys/block/DEV/range, we will use our own - * value. - */ -static unsigned int -_device_get_partition_range(PedDevice* dev) -{ - int range, r; - char path[128]; - FILE* fp; - bool ok; - - r = snprintf(path, sizeof(path), "/sys/block/%s/range", - last_component(dev->path)); - if(r < 0 || r >= sizeof(path)) - return MAX_NUM_PARTS; - - fp = fopen(path, "r"); - if(!fp) - return MAX_NUM_PARTS; - - ok = fscanf(fp, "%d", &range) == 1; - fclose(fp); - - /* (range <= 0) is none sense.*/ - return ok && range > 0 ? range : MAX_NUM_PARTS; -} - -/* - * Sync the partition table in two step process: - * 1. Remove all of the partitions from the kernel's tables, but do not attempt - * removal of any partition for which the corresponding ioctl call fails. - * 2. Add all the partitions that we hold in disk. - * - * To achieve this two step process we must calculate the minimum number of - * maximum possible partitions between what linux supports and what the label - * type supports. EX: - * - * number=MIN(max_parts_supported_in_linux,max_parts_supported_in_msdos_tables) - */ -static int -_disk_sync_part_table (PedDisk* disk) -{ - PED_ASSERT(disk != NULL, return 0); - PED_ASSERT(disk->dev != NULL, return 0); - int lpn; - - /* lpn = largest partition number. */ - if(ped_disk_get_max_supported_partition_count(disk, &lpn)) - lpn = PED_MIN(lpn, _device_get_partition_range(disk->dev)); - else - lpn = _device_get_partition_range(disk->dev); - - /* Its not possible to support largest_partnum < 0. - * largest_partnum == 0 would mean does not support partitions. - * */ - if(lpn < 0) - return 0; - - int *rets = ped_malloc(sizeof(int) * lpn); - int *errnums = ped_malloc(sizeof(int) * lpn); - int ret = 1; - int i; - - for (i = 1; i <= lpn; i++) { - rets[i - 1] = _blkpg_remove_partition (disk, i); - errnums[i - 1] = errno; - } - - for (i = 1; i <= lpn; i++) { - const PedPartition *part = ped_disk_get_partition (disk, i); - if (part) { - /* busy... so we won't (can't!) disturb ;) Prolly - * doesn't matter anyway, because users shouldn't be - * changing mounted partitions anyway... - */ - if (!rets[i - 1] && errnums[i - 1] == EBUSY) - continue; - - /* add the (possibly modified or new) partition */ - if (!_blkpg_add_partition (disk, part)) - ret = 0; - } - } - - free (rets); - free (errnums); - return ret; -} - #ifdef ENABLE_DEVICE_MAPPER static int _dm_remove_map_name(char *name) @@ -2601,19 +2414,6 @@ _kernel_reread_part_table (PedDevice* dev) } static int -_have_blkpg () -{ - static int have_blkpg = -1; - int kver; - - if (have_blkpg != -1) - return have_blkpg; - - kver = _get_linux_version(); - return have_blkpg = kver >= KERNEL_VERSION (2,4,0) ? 1 : 0; -} - -static int linux_disk_commit (PedDisk* disk) { #ifdef ENABLE_DEVICE_MAPPER @@ -2621,19 +2421,6 @@ linux_disk_commit (PedDisk* disk) return _dm_reread_part_table (disk); #endif if (disk->dev->type != PED_DEVICE_FILE) { - /* The ioctl() command BLKPG_ADD_PARTITION does not notify - * the devfs system; consequently, /proc/partitions will not - * be up to date, and the proper links in /dev are not - * created. Therefore, if using DevFS, we must get the kernel - * to re-read and grok the partition table. - */ - /* Work around kernel dasd problem so we really do BLKRRPART */ - if (disk->dev->type != PED_DEVICE_DASD && - _have_blkpg () && !_have_devfs ()) { - if (_disk_sync_part_table (disk)) - return 1; - } - return _kernel_reread_part_table (disk->dev); } -- 1.6.4