33a7ac7557
. libc: add vfs_mmap, a way for vfs to initiate mmap()s. This is a good special case to have as vfs is a slightly different client from regular user processes. It doesn't do it for itself, and has the dev & inode info already so the callback to VFS for the lookup isn't necessary. So it has different info to have to give to VM. . libc: also add minix_mmap64() that accepts a 64-bit offset, even though our off_t is still 32 bit now. . On exec() time, try to mmap() in the executable if available. (It is not yet available in this commit.) . To support mmap(), add do_vm_call that allows VM to lookup (to ino+dev), do i/o from and close FD's on behalf of other processes. Change-Id: I831551e45a6781c74313c450eb9c967a68505932
93 lines
3.3 KiB
C
93 lines
3.3 KiB
C
/* Prototypes and definitions for VM interface. */
|
|
|
|
#ifndef _MINIX_VM_H
|
|
#define _MINIX_VM_H
|
|
|
|
#include <sys/types.h>
|
|
#include <minix/endpoint.h>
|
|
|
|
int vm_exit(endpoint_t ep);
|
|
int vm_fork(endpoint_t ep, int slotno, endpoint_t *child_ep);
|
|
int vm_brk(endpoint_t ep, char *newaddr);
|
|
int vm_willexit(endpoint_t ep);
|
|
int vm_adddma(endpoint_t proc_e, phys_bytes start, phys_bytes size);
|
|
int vm_deldma(endpoint_t proc_e, phys_bytes start, phys_bytes size);
|
|
int vm_getdma(endpoint_t *procp, phys_bytes *basep, phys_bytes *sizep);
|
|
void *vm_map_phys(endpoint_t who, void *physaddr, size_t len);
|
|
int vm_unmap_phys(endpoint_t who, void *vaddr, size_t len);
|
|
|
|
int vm_notify_sig(endpoint_t ep, endpoint_t ipc_ep);
|
|
int vm_set_priv(int procnr, void *buf);
|
|
int vm_update(endpoint_t src_e, endpoint_t dst_e);
|
|
int vm_memctl(endpoint_t ep, int req);
|
|
int vm_query_exit(endpoint_t *endpt);
|
|
int vm_watch_exit(endpoint_t ep);
|
|
int vm_forgetblock(u64_t id);
|
|
void vm_forgetblocks(void);
|
|
int vm_yield_block_get_block(u64_t yieldid, u64_t getid, void *mem,
|
|
vir_bytes len);
|
|
int minix_vfs_mmap(endpoint_t who, u32_t offset, u32_t len,
|
|
u32_t dev, u32_t ino, u16_t fd, u32_t vaddr, u16_t clearend, u16_t
|
|
flags);
|
|
|
|
/* minix vfs mmap flags */
|
|
#define MVM_LENMASK 0x0FFF
|
|
#define MVM_FLAGSMASK 0xF000
|
|
#define MVM_WRITABLE 0x8000
|
|
|
|
/* Invalid ID with special meaning for the vm_yield_block_get_block
|
|
* interface.
|
|
*/
|
|
#define VM_BLOCKID_NONE make64(ULONG_MAX, ULONG_MAX)
|
|
|
|
/* VM kernel request types. */
|
|
#define VMPTYPE_NONE 0
|
|
#define VMPTYPE_CHECK 1
|
|
|
|
struct vm_stats_info {
|
|
unsigned int vsi_pagesize; /* page size */
|
|
unsigned long vsi_total; /* total number of memory pages */
|
|
unsigned long vsi_free; /* number of free pages */
|
|
unsigned long vsi_largest; /* largest number of consecutive free pages */
|
|
unsigned long vsi_cached; /* number of pages cached for file systems */
|
|
};
|
|
|
|
struct vm_usage_info {
|
|
vir_bytes vui_total; /* total amount of process memory */
|
|
vir_bytes vui_common; /* part of memory mapped in more than once */
|
|
vir_bytes vui_shared; /* shared (non-COW) part of common memory */
|
|
};
|
|
|
|
struct vm_region_info {
|
|
vir_bytes vri_addr; /* base address of region */
|
|
vir_bytes vri_length; /* length of region */
|
|
int vri_prot; /* protection flags (PROT_) */
|
|
int vri_flags; /* memory flags (subset of MAP_) */
|
|
};
|
|
|
|
#define MAX_VRI_COUNT 64 /* max. number of regions provided at once */
|
|
|
|
int vm_info_stats(struct vm_stats_info *vfi);
|
|
int vm_info_usage(endpoint_t who, struct vm_usage_info *vui);
|
|
int vm_info_region(endpoint_t who, struct vm_region_info *vri, int
|
|
count, vir_bytes *next);
|
|
int vm_procctl(endpoint_t ep, int param);
|
|
|
|
int vm_set_cacheblock(void *block, u32_t dev, u64_t dev_offset,
|
|
u64_t ino, u64_t ino_offset, u32_t *flags, int blocksize);
|
|
|
|
void *vm_map_cacheblock(u32_t dev, u64_t dev_offset,
|
|
u64_t ino, u64_t ino_offset, u32_t *flags, int blocksize);
|
|
|
|
/* flags for vm cache functions */
|
|
#define VMMC_FLAGS_LOCKED 0x01 /* someone is updating the flags; don't read/write */
|
|
#define VMMC_DIRTY 0x02 /* dirty buffer and it may not be evicted */
|
|
#define VMMC_EVICTED 0x04 /* VM has evicted the buffer and it's invalid */
|
|
#define VMMC_BLOCK_LOCKED 0x08 /* client is using it and it may not be evicted */
|
|
|
|
/* special inode number for vm cache functions */
|
|
#define VMC_NO_INODE 0 /* to reference a disk block, no associated file */
|
|
|
|
#endif /* _MINIX_VM_H */
|
|
|