static int
fs_stateMapFile(struct fs_dump_state * state, int preserve_flag )
{
int ret = 0, flags;
switch(state->mode) {
case FS_STATE_LOAD_MODE:
flags = PROT_READ | PROT_WRITE; /* loading involves a header invalidation */
break;
case FS_STATE_DUMP_MODE:
flags = PROT_WRITE;
break;
default:
ViceLog(0, ("fs_stateMapFile: invalid dump state mode\n"));
return 1;
}
state->mmap.map = afs_mmap(NULL,
state->file_len,
flags,
MAP_SHARED,
state->fd,
0);
if (state->mmap.map == MAP_FAILED) {
state->mmap.size = 0;
state->mmap.map = NULL;
ViceLog(0, ("fs_stateMapFile: failed to memory map file '%s'\n",
state->fn));
ret = 1;
goto done;
}
state->mmap.size = state->file_len;
state->mmap.cursor = state->mmap.map;
if (preserve_flag) {
/* don't lose track of where we are during a file resize */
afs_foff_t curr_offset = state->mmap.offset;
state->mmap.offset = 0;
fs_stateIncCursor(state, curr_offset);
} else { /* reset offset */
state->mmap.offset = 0;
}
/* for state loading, accesses will be sequential, so let's give
* the VM subsystem a heads up */
if (state->mode == FS_STATE_LOAD_MODE) {
/* XXX madvise may not exist on all platforms, so
* we may need to add some ifdefs at some point... */
flags = MADV_SEQUENTIAL | MADV_WILLNEED;
#ifdef AFS_SUN510_ENV
flags |= MADV_ACCESS_LWP; /* added in solaris 9 12/02 */
#endif
madvise(state->mmap.map, state->mmap.size, flags);
}
done:
return ret;
}
static int
openFile(char * path)
{
int ret = 0;
struct afs_stat status;
dump_fd = afs_open(path, O_RDWR);
if (dump_fd == -1) {
fprintf(stderr, "dump file '%s' failed to open\n", path);
ret = 1;
goto done;
}
printf("opened dump file '%s'\n", path);
if (afs_fstat(dump_fd, &status) == -1) {
fprintf(stderr, "failed to stat file\n");
ret = 1;
goto done;
}
map_len = status.st_size;
map = afs_mmap(NULL, map_len, PROT_READ, MAP_SHARED, dump_fd, 0);
if (map == MAP_FAILED) {
fprintf(stderr, "failed to mmap file\n");
ret = 1;
goto done;
}
printf("mapped %lu bytes at %"AFS_PTR_FMT"\n", (unsigned long)map_len, map);
done:
if (ret) {
if (map) {
munmap(map, map_len);
map = NULL;
}
if (dump_fd != -1) {
close(dump_fd);
dump_fd = -1;
}
}
return ret;
}
