/*===========================================================================*
* send_reply *
*===========================================================================*/
PRIVATE void send_reply(int err, int transid)
{
/* Send a reply to the caller.
*/
int r;
fs_m_out.m_type = err;
if (IS_VFS_FS_TRANSID(transid)) {
fs_m_out.m_type = TRNS_ADD_ID(fs_m_out.m_type, transid);
}
if ((r = send(fs_m_in.m_source, &fs_m_out)) != OK)
panic(__FILE__, "unable to send reply", r);
}
/*===========================================================================*
* sendmsg *
*===========================================================================*/
static int sendmsg(struct vmnt *vmp, endpoint_t dst, struct worker_thread *wp)
{
/* This is the low level function that sends requests.
* Currently to FSes or VM.
*/
int r, transid;
if(vmp) vmp->m_comm.c_cur_reqs++; /* One more request awaiting a reply */
transid = wp->w_tid + VFS_TRANSID;
wp->w_sendrec->m_type = TRNS_ADD_ID(wp->w_sendrec->m_type, transid);
wp->w_task = dst;
if ((r = asynsend3(dst, wp->w_sendrec, AMF_NOREPLY)) != OK) {
printf("VFS: sendmsg: error sending message. "
"dest: %d req_nr: %d err: %d\n", dst,
wp->w_sendrec->m_type, r);
util_stacktrace();
return(r);
}
return(r);
}
/*===========================================================================*
* main *
*===========================================================================*/
PUBLIC int main(int argc, char *argv[])
{
/* This is the main routine of this service. The main loop consists of
* three major activities: getting new work, processing the work, and
* sending the reply. The loop never terminates, unless a panic occurs.
*/
int error = OK, ind, transid;
unsigned short test_endian = 1;
/* SEF local startup. */
env_setargs(argc, argv);
sef_local_startup();
le_CPU = (*(unsigned char *) &test_endian == 0 ? 0 : 1);
/* Server isn't tested on big endian CPU */
ASSERT(le_CPU == 1);
while(!unmountdone || !exitsignaled) {
endpoint_t src;
/* Wait for request message. */
get_work(&fs_m_in);
transid = TRNS_GET_ID(fs_m_in.m_type);
fs_m_in.m_type = TRNS_DEL_ID(fs_m_in.m_type);
if (fs_m_in.m_type == 0) {
assert(!IS_VFS_FS_TRANSID(transid));
fs_m_in.m_type = transid; /* Backwards compat. */
transid = 0;
} else
assert(IS_VFS_FS_TRANSID(transid));
src = fs_m_in.m_source;
caller_uid = INVAL_UID; /* To trap errors */
caller_gid = INVAL_GID;
req_nr = fs_m_in.m_type;
if (req_nr < VFS_BASE) {
fs_m_in.m_type += VFS_BASE;
req_nr = fs_m_in.m_type;
}
ind = req_nr - VFS_BASE;
if (ind < 0 || ind >= NREQS) {
printf("mfs: bad request %d\n", req_nr);
printf("ind = %d\n", ind);
error = EINVAL;
} else {
error = (*fs_call_vec[ind])();
}
fs_m_out.m_type = error;
if (IS_VFS_FS_TRANSID(transid)) {
/* If a transaction ID was set, reset it */
fs_m_out.m_type = TRNS_ADD_ID(fs_m_out.m_type, transid);
}
reply(src, &fs_m_out);
if (error == OK)
read_ahead(); /* do block read ahead */
}
return 0;
}
/*===========================================================================*
* main *
*===========================================================================*/
PUBLIC int main(int argc, char *argv[])
{
/* This is the main routine of this service. The main loop consists of
* three major activities: getting new work, processing the work, and
* sending the reply. The loop never terminates, unless a panic occurs.
*/
int ind, transid;
message pfs_m_in;
message pfs_m_out;
/* SEF local startup. */
env_setargs(argc, argv);
sef_local_startup();
while(!exitsignaled || busy) {
endpoint_t src;
/* Wait for request message. */
get_work(&pfs_m_in);
transid = TRNS_GET_ID(pfs_m_in.m_type);
pfs_m_in.m_type = TRNS_DEL_ID(pfs_m_in.m_type);
if (pfs_m_in.m_type == 0) {
assert(!IS_VFS_FS_TRANSID(transid));
pfs_m_in.m_type = transid;
transid = 0;
} else
assert(IS_VFS_FS_TRANSID(transid) || transid == 0);
src = pfs_m_in.m_source;
caller_uid = INVAL_UID; /* To trap errors */
caller_gid = INVAL_GID;
req_nr = pfs_m_in.m_type;
if (IS_DEV_RQ(req_nr)) {
ind = req_nr - DEV_RQ_BASE;
if (ind < 0 || ind >= DEV_CALL_VEC_SIZE) {
printf("pfs: bad DEV request %d\n", req_nr);
pfs_m_out.m_type = EINVAL;
} else {
(*dev_call_vec[ind])(&pfs_m_in, &pfs_m_out);
}
} else if (IS_VFS_RQ(req_nr)) {
ind = req_nr - VFS_BASE;
if (ind < 0 || ind >= FS_CALL_VEC_SIZE) {
printf("pfs: bad FS request %d\n", req_nr);
pfs_m_out.m_type = EINVAL;
} else {
pfs_m_out.m_type =
(*fs_call_vec[ind])(&pfs_m_in, &pfs_m_out);
}
} else {
printf("pfs: bad request %d\n", req_nr);
pfs_m_out.m_type = EINVAL;
}
if (IS_VFS_RQ(req_nr) && IS_VFS_FS_TRANSID(transid)) {
pfs_m_out.m_type = TRNS_ADD_ID(pfs_m_out.m_type, transid);
}
reply(src, &pfs_m_out);
}
return(OK);
}
