b80e3ac26b
Primary purpose of change: to support the mmap implementation, VM must know both (a) about some block metadata for FS cache blocks, i.e. inode numbers and inode offsets where applicable; and (b) know about *all* cache blocks, i.e. also of the FS primary caches and not just the blocks that spill into the secondary one. This changes the interface and VM data structures. This change is only for the interface (libminixfs) and VM data structures; the filesystem code is unmodified, so although the secondary cache will be used as normal, blocks will not be annotated with inode information until the FS is modified to provide this information. Until it is modified, mmap of files will fail gracefully on such filesystems. This is indicated to VFS/VM by returning ENOSYS for REQ_PEEK. Change-Id: I5ddf51a27e3b85b87a10556be87fc33bb92b1090
42 lines
918 B
C
42 lines
918 B
C
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#include <minix/sys_config.h>
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#include <minix/type.h>
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#include <minix/param.h>
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#include <sys/stat.h>
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#include <a.out.h>
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#include "vm.h"
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#include "vmproc.h"
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#if _MAIN
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#undef EXTERN
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#define EXTERN
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#endif
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#define VMP_EXECTMP _NR_PROCS
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#define VMP_NR _NR_PROCS+1
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EXTERN struct vmproc vmproc[VMP_NR];
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EXTERN kinfo_t kernel_boot_info;
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#if SANITYCHECKS
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EXTERN int nocheck;
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EXTERN int incheck;
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EXTERN int sc_lastline;
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EXTERN char *sc_lastfile;
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#endif
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extern struct minix_kerninfo *_minix_kerninfo;
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/* mem types */
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EXTERN mem_type_t mem_type_anon, /* anonymous memory */
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mem_type_directphys, /* direct physical mapping memory */
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mem_type_anon_contig, /* physically contig anon memory */
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mem_type_cache, /* disk cache */
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mem_type_mappedfile, /* memory with file contents */
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mem_type_shared; /* memory shared by multiple processes */
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/* total number of memory pages */
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EXTERN int total_pages;
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