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SUSE:SLE-12-SP4:Update
parted.3441
libparted-add-support-for-implicit-FBA-DASD-par...
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File libparted-add-support-for-implicit-FBA-DASD-partition.patch of Package parted.3441
From f70ff1fc474764c3a71318ddb4e0d26afc52ac47 Mon Sep 17 00:00:00 2001 From: Nageswara R Sastry <rnsastry@linux.vnet.ibm.com> Date: Wed, 21 Aug 2013 16:09:56 -0700 Subject: [PATCH] libparted: add support for implicit FBA DASD partitions Fixed Block Access (FBA) DASDs are mainframe-specific disk devices which are layed out as a sequence of 512-byte sectors. In contrast to ECKD DASDs, these disks do not require formatting and resemble the LBA layout of non-mainframe disks. Despite this resemblance, the Linux kernel applies special handling during partition detection for FBA DASDs, resulting in a single, immutable partition being reported. While actual FBA DASD hardware is no longer available, the z/VM hypervisor can simulate FBA DASD disks, backed by either ECKD or SCSI devices. This patch adds support for recognizing FBA DASD partitions to parted. Signed-off-by: Nageswara R Sastry <rnsastry@linux.vnet.ibm.com> Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> --- include/parted/fdasd.in.h | 2 + libparted/labels/dasd.c | 63 +++++++++++++++++++++++++++++++++++++++------- libparted/labels/fdasd.c | 5 +++ 3 files changed, 61 insertions(+), 9 deletions(-) Index: parted-3.1/include/parted/fdasd.in.h =================================================================== --- parted-3.1.orig/include/parted/fdasd.in.h +++ parted-3.1/include/parted/fdasd.in.h @@ -194,6 +194,8 @@ typedef struct fdasd_anchor { volume_label_t *vlabel; config_data_t confdata[USABLE_PARTITIONS]; struct fdasd_hd_geometry geo; + unsigned int label_block; + unsigned int FBA_layout; } fdasd_anchor_t; enum offset {lower, upper}; Index: parted-3.1/libparted/labels/dasd.c =================================================================== --- parted-3.1.orig/libparted/labels/dasd.c +++ parted-3.1/libparted/labels/dasd.c @@ -71,6 +71,7 @@ typedef struct { typedef struct { unsigned int format_type; + unsigned int label_block; volume_label_t vlabel; } DasdDiskSpecific; @@ -151,6 +152,7 @@ dasd_alloc (const PedDevice* dev) /* CDL format, newer */ disk_specific->format_type = 2; + disk_specific->label_block = 2; /* Setup volume label (for fresh disks) */ snprintf(volser, sizeof(volser), "0X%04X", arch_specific->devno); @@ -226,7 +228,9 @@ dasd_probe (const PedDevice *dev) fdasd_check_api_version(&anchor, arch_specific->fd); - if (fdasd_check_volume(&anchor, arch_specific->fd)) + /* Labels are required on CDL formatted DASDs. */ + if (fdasd_check_volume(&anchor, arch_specific->fd) && + anchor.FBA_layout == 0) goto error_cleanup; fdasd_cleanup(&anchor); @@ -273,17 +277,53 @@ dasd_read (PedDisk* disk) fdasd_initialize_anchor(&anchor); fdasd_get_geometry(disk->dev, &anchor, arch_specific->fd); + disk_specific->label_block = anchor.label_block; + + if ((anchor.geo.cylinders * anchor.geo.heads) > BIG_DISK_SIZE) + anchor.big_disk++; /* check dasd for labels and vtoc */ - if (fdasd_check_volume(&anchor, arch_specific->fd)) - goto error_close_dev; + if (fdasd_check_volume(&anchor, arch_specific->fd)) { + DasdPartitionData* dasd_data; + + /* Kernel partitioning code will report 'implicit' partitions + * for non-CDL format DASDs even when there is no + * label/VTOC. */ + if (anchor.FBA_layout == 0) + goto error_close_dev; + + disk_specific->format_type = 1; + + /* Register implicit partition */ + ped_disk_delete_all (disk); + + start = (PedSector) arch_specific->real_sector_size / + (PedSector) disk->dev->sector_size * + (PedSector) (anchor.label_block + 1); + end = disk->dev->length - 1; + part = ped_partition_new (disk, PED_PARTITION_NORMAL, NULL, + start, end); + if (!part) + goto error_close_dev; + + part->num = 1; + part->fs_type = ped_file_system_probe (&part->geom); + dasd_data = part->disk_specific; + dasd_data->raid = 0; + dasd_data->lvm = 0; + dasd_data->type = 0; + + if (!ped_disk_add_partition (disk, part, NULL)) + goto error_close_dev; + + fdasd_cleanup(&anchor); + + return 1; + } /* Save volume label (read by fdasd_check_volume) for writing */ memcpy(&disk_specific->vlabel, anchor.vlabel, sizeof(volume_label_t)); - if ((anchor.geo.cylinders * anchor.geo.heads) > BIG_DISK_SIZE) - anchor.big_disk++; - ped_disk_delete_all (disk); bool is_ldl = strncmp(anchor.vlabel->volkey, @@ -348,7 +388,7 @@ dasd_read (PedDisk* disk) / (long long) disk->dev->sector_size * (long long) (cms_ptr->block_count - 1) - 1; - part = ped_partition_new (disk, PED_PARTITION_PROTECTED, NULL, start, end); + part = ped_partition_new (disk, PED_PARTITION_NORMAL, NULL, start, end); if (!part) goto error_close_dev; @@ -926,7 +966,12 @@ dasd_alloc_metadata (PedDisk* disk) the start of the first partition */ if (disk_specific->format_type == 1) { part = ped_disk_get_partition(disk, 1); - vtoc_end = part->geom.start - 1; + if (part) + vtoc_end = part->geom.start - 1; + else + vtoc_end = (PedSector) arch_specific->real_sector_size / + (PedSector) disk->dev->sector_size * + (PedSector) disk_specific->label_block; } else { if (disk->dev->type == PED_DEVICE_FILE) @@ -946,7 +991,7 @@ dasd_alloc_metadata (PedDisk* disk) goto error; } - if (disk_specific->format_type == 1) { + if (disk_specific->format_type == 1 && part) { /* For LDL or CMS there may be trailing metadata as well. For example: the last block of a CMS reserved file, Index: parted-3.1/libparted/labels/fdasd.c =================================================================== --- parted-3.1.orig/libparted/labels/fdasd.c +++ parted-3.1/libparted/labels/fdasd.c @@ -721,6 +721,7 @@ fdasd_check_volume (fdasd_anchor_t *anc, unsigned long b = -1; char str[LINE_LENGTH]; + memset(v, 0, sizeof(volume_label_t)); vtoc_read_volume_label (fd, anc->label_pos, v); if (strncmp(v->vollbl, vtoc_ebcdic_enc ("VOL1", str, 4), 4) == 0) { @@ -800,6 +801,8 @@ fdasd_get_geometry (const PedDevice *dev dasd_info.dev_type = 13200; dasd_info.label_block = 2; dasd_info.devno = 513; + dasd_info.label_block = 2; + dasd_info.FBA_layout = 0; } else { if (ioctl(f, HDIO_GETGEO, &anc->geo) != 0) fdasd_error(anc, unable_to_ioctl, @@ -820,6 +823,8 @@ fdasd_get_geometry (const PedDevice *dev anc->label_pos = dasd_info.label_block * blksize; anc->devno = dasd_info.devno; anc->fspace_trk = anc->geo.cylinders * anc->geo.heads - FIRST_USABLE_TRK; + anc->label_block = dasd_info.label_block; + anc->FBA_layout = dasd_info.FBA_layout; } /*
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