49eb1f4806
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: I1d2df6c485e6c5e89eb28d9055076cc02629594e
36 lines
787 B
C
36 lines
787 B
C
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#ifndef _VMPROC_H
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#define _VMPROC_H 1
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#include <minix/bitmap.h>
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#include <machine/archtypes.h>
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#include "pt.h"
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#include "vm.h"
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#include "regionavl.h"
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struct vmproc;
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struct vmproc {
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int vm_flags;
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endpoint_t vm_endpoint;
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pt_t vm_pt; /* page table data */
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struct boot_image *vm_boot; /* if boot time process */
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/* Regions in virtual address space. */
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region_avl vm_regions_avl;
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vir_bytes vm_region_top; /* highest vaddr last inserted */
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bitchunk_t vm_call_mask[VM_CALL_MASK_SIZE];
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int vm_slot; /* process table slot */
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#if VMSTATS
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int vm_bytecopies;
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#endif
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};
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/* Bits for vm_flags */
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#define VMF_INUSE 0x001 /* slot contains a process */
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#define VMF_EXITING 0x002 /* PM is cleaning up this process */
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#define VMF_WATCHEXIT 0x008 /* Store in queryexit table */
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#endif
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