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/*
* Copyright (C) 2019 Ernesto A. Fernández <ernesto.mnd.fernandez@gmail.com>
*/
#ifndef _APFSCK_H
#define _APFSCK_H
#include <stdbool.h>
/* Declarations for global variables */
extern unsigned int options; /* Command line options */
extern struct super_block *sb; /* Filesystem superblock */
extern struct volume_superblock *vsb; /* Volume superblock */
extern int fd_main; /* File descriptor for the main device */
extern int fd_tier2; /* File descriptor for the tier 2 device, if any */
extern bool ongoing_query; /* Are we currently running a query? */
/* Option flags */
#define OPT_REPORT_CRASH 1 /* Report on-disk signs of a past crash */
#define OPT_REPORT_UNKNOWN 2 /* Report unknown or unsupported features */
#define OPT_REPORT_WEIRD 4 /* Report issues that may not be corruption */
extern __attribute__((noreturn, format(printf, 2, 3)))
void report(const char *context, const char *message, ...);
extern void report_crash(const char *context);
extern void report_unknown(const char *feature);
extern void report_weird(const char *context);
extern __attribute__((noreturn)) void system_error(void);
#include <sys/mman.h>
#include <unistd.h>
#include <apfs/raw.h>
#include <apfs/types.h>
/* Forwards the mmap() call to the proper device of a fusion drive */
static inline void *apfs_mmap(void *addr, size_t length, int prot, int flags, u64 offset)
{
/*
* TODO: check that the block is in the correct device for all callers
* where that is known.
*/
if (offset >= APFS_FUSION_TIER2_DEVICE_BYTE_ADDR) {
if (fd_tier2 == -1)
report(NULL, "Address in missing tier 2 device.");
offset -= APFS_FUSION_TIER2_DEVICE_BYTE_ADDR;
return mmap(addr, length, prot, flags, fd_tier2, (off_t)offset);
}
return mmap(addr, length, prot, flags, fd_main, (off_t)offset);
}
/* Forwards the pread() call to the proper device of a fusion drive */
static inline ssize_t apfs_pread(void *buf, size_t count, u64 offset)
{
/*
* TODO: check that the block is in the correct device for all callers
* where that is known.
*/
if (offset >= APFS_FUSION_TIER2_DEVICE_BYTE_ADDR) {
if (fd_tier2 == -1)
report(NULL, "Address in missing tier 2 device.");
offset -= APFS_FUSION_TIER2_DEVICE_BYTE_ADDR;
return pread(fd_tier2, buf, count, (off_t)offset);
}
return pread(fd_main, buf, count, (off_t)offset);
}
#endif /* _APFSCK_H */
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