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When detecting disk type, the function disk_get_info() is called. It can fail for various reasons (e.g. when the logial target is not eligible for boot record installation). Once disk_get_info() fails, don't proceed with type detection. Return error instead. When applicable, mark the dump job with "is_ngdump" flag to avoid extra type detection calls. Acked-by: Mikhail Zaslonko <zaslonko@linux.ibm.com> Signed-off-by: Eduard Shishkin <edward6@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
143 lines
4.0 KiB
C
143 lines
4.0 KiB
C
/*
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* s390-tools/zipl/include/disk.h
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* Functions to handle disk layout specific operations.
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*
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* Copyright IBM Corp. 2001, 2017
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*
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*/
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#ifndef DISK_H
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#define DISK_H
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#include <stdint.h>
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#include <sys/types.h>
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#include "zipl.h"
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#include "lib/vtoc.h"
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/* Type for representing disk block numbers */
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typedef uint64_t blocknum_t;
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/* Pointer to block on a disk with cyl/head/sec layout */
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struct disk_blockptr_chs {
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unsigned int cyl;
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int head;
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int sec;
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int size;
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int blockct;
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};
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/* Pointer to a block on a disk with linear layout */
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struct disk_blockptr_linear {
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blocknum_t block;
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int size;
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int blockct;
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};
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/* This represents in-memory pointer to a block on disk */
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typedef union {
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struct disk_blockptr_chs chs;
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struct disk_blockptr_linear linear;
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} disk_blockptr_t;
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/* Disk type identifier */
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typedef enum {
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disk_type_scsi,
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disk_type_fba,
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disk_type_diag,
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disk_type_eckd_ldl,
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disk_type_eckd_cdl,
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} disk_type_t;
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struct disk_ext_type {
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disk_type_t type;
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bool is_nvme;
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};
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/* targetbase definition */
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typedef enum {
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defined_as_device,
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defined_as_name,
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undefined
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} definition_t;
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/* Disk information type */
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struct disk_info {
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disk_type_t type;
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dev_t device; /* logical device for bootmap creation */
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dev_t partition;
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int devno;
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int partnum;
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int phy_block_size;
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int fs_block_size;
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uint64_t phy_blocks;
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struct hd_geometry geo;
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char* name;
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char* drv_name;
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definition_t targetbase_def;
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int is_nvme;
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dev_t basedisks[MAX_TARGETS]; /* array of physical disks for
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* bootstrap blocks recording
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*/
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};
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struct file_range {
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off_t offset;
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size_t len;
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};
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struct job_target_data;
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int disk_get_info(const char *device, struct job_target_data *target,
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struct disk_info **info);
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int disk_get_ext_type(const char *device, struct disk_ext_type *ext_type);
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int disk_is_tape(const char *device);
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int disk_type_is_scsi(struct disk_ext_type *ext_type);
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int disk_type_is_eckd_ldl(struct disk_ext_type *ext_type);
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int disk_type_is_nvme(struct disk_ext_type *ext_type);
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int disk_type_is_eckd(disk_type_t type);
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int disk_get_info_from_file(const char* filename,
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struct job_target_data* target,
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struct disk_info** info);
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void disk_free_info(struct disk_info* info);
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char* disk_get_type_name(disk_type_t type);
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char *disk_get_ipl_type(disk_type_t type, int is_dump);
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int disk_is_large_volume(struct disk_info* info);
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int disk_cyl_from_blocknum(blocknum_t blocknum, struct disk_info* info);
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int disk_head_from_blocknum(blocknum_t blocknum, struct disk_info* info);
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int disk_sec_from_blocknum(blocknum_t blocknum, struct disk_info* info);
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void disk_blockptr_from_blocknum(disk_blockptr_t* ptr, blocknum_t blocknum,
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struct disk_info* info);
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int disk_write_block_aligned(int fd, const void* data, size_t bytecount,
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disk_blockptr_t* block, struct disk_info* info);
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blocknum_t disk_write_block_buffer(int fd, int fd_is_basedisk,
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const void* buffer, size_t bytecount,
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disk_blockptr_t** blocklist,
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struct disk_info *info);
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blocknum_t disk_write_block_buffer_align(int fd, int fd_is_basedisk,
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const void *buffer, size_t bytecount,
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disk_blockptr_t **blocklist,
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struct disk_info *info, int align,
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off_t *offset);
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void disk_print_devt(dev_t d);
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void disk_print_devname(dev_t d);
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void prepare_footnote_ptr(int source, char *ptr);
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void print_footnote_ref(int source, const char *prefix);
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void disk_print_info(struct disk_info *info, int source);
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int disk_is_zero_block(disk_blockptr_t* block, struct disk_info* info);
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blocknum_t disk_compact_blocklist(disk_blockptr_t* list, blocknum_t count,
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struct disk_info* info);
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blocknum_t disk_get_blocklist_from_file(const char* filename,
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struct file_range *reg,
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disk_blockptr_t** blocklist,
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struct disk_info* pinfo);
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int disk_check_subchannel_set(int devno, dev_t device, char* dev_name);
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int fs_map(int fd, uint64_t offset, blocknum_t *mapped, int fs_block_size);
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#endif /* not DISK_H */
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