forked from Minki/linux
1493bf217f
Make the following changes to partition check code. * Add ->bdev to struct parsed_partitions. * Introduce read_part_sector() which is a simple wrapper around read_dev_sector() which takes struct parsed_partitions *state instead of @bdev. * For functions which used to take @state and @bdev, drop @bdev. For functions which used to take @bdev, replace it with @state. * While updating, drop superflous checks on NULL state/bdev in ldm.c. This cleans up the API a bit and enables better handling of IO errors during partition check as the generic partition check code now has much better visibility into what went wrong in the low level code paths. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Ben Hutchings <ben@decadent.org.uk> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
79 lines
1.7 KiB
C
79 lines
1.7 KiB
C
/*
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* fs/partitions/osf.c
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*
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* Code extracted from drivers/block/genhd.c
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*
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* Copyright (C) 1991-1998 Linus Torvalds
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* Re-organised Feb 1998 Russell King
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*/
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#include "check.h"
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#include "osf.h"
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int osf_partition(struct parsed_partitions *state)
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{
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int i;
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int slot = 1;
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Sector sect;
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unsigned char *data;
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struct disklabel {
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__le32 d_magic;
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__le16 d_type,d_subtype;
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u8 d_typename[16];
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u8 d_packname[16];
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__le32 d_secsize;
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__le32 d_nsectors;
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__le32 d_ntracks;
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__le32 d_ncylinders;
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__le32 d_secpercyl;
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__le32 d_secprtunit;
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__le16 d_sparespertrack;
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__le16 d_sparespercyl;
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__le32 d_acylinders;
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__le16 d_rpm, d_interleave, d_trackskew, d_cylskew;
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__le32 d_headswitch, d_trkseek, d_flags;
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__le32 d_drivedata[5];
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__le32 d_spare[5];
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__le32 d_magic2;
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__le16 d_checksum;
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__le16 d_npartitions;
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__le32 d_bbsize, d_sbsize;
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struct d_partition {
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__le32 p_size;
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__le32 p_offset;
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__le32 p_fsize;
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u8 p_fstype;
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u8 p_frag;
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__le16 p_cpg;
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} d_partitions[8];
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} * label;
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struct d_partition * partition;
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data = read_part_sector(state, 0, §);
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if (!data)
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return -1;
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label = (struct disklabel *) (data+64);
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partition = label->d_partitions;
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if (le32_to_cpu(label->d_magic) != DISKLABELMAGIC) {
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put_dev_sector(sect);
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return 0;
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}
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if (le32_to_cpu(label->d_magic2) != DISKLABELMAGIC) {
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put_dev_sector(sect);
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return 0;
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}
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for (i = 0 ; i < le16_to_cpu(label->d_npartitions); i++, partition++) {
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if (slot == state->limit)
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break;
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if (le32_to_cpu(partition->p_size))
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put_partition(state, slot,
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le32_to_cpu(partition->p_offset),
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le32_to_cpu(partition->p_size));
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slot++;
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}
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printk("\n");
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put_dev_sector(sect);
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return 1;
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}
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