152 lines
4.1 KiB
C
152 lines
4.1 KiB
C
#include "fs.h"
|
|
#include <assert.h>
|
|
#include <signal.h>
|
|
#include <minix/dmap.h>
|
|
#include <minix/endpoint.h>
|
|
#include <minix/vfsif.h>
|
|
#include "buf.h"
|
|
#include "inode.h"
|
|
|
|
FORWARD _PROTOTYPE(void get_work, (message *m_in) );
|
|
|
|
/* SEF functions and variables. */
|
|
FORWARD _PROTOTYPE( void sef_local_startup, (void) );
|
|
FORWARD _PROTOTYPE( int sef_cb_init_fresh, (int type, sef_init_info_t *info) );
|
|
FORWARD _PROTOTYPE( void sef_cb_signal_handler, (int signo) );
|
|
|
|
/*===========================================================================*
|
|
* 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, ind;
|
|
|
|
/* SEF local startup. */
|
|
env_setargs(argc, argv);
|
|
sef_local_startup();
|
|
|
|
while(!exitsignaled || busy) {
|
|
endpoint_t src;
|
|
|
|
/* Wait for request message. */
|
|
get_work(&fs_m_in);
|
|
|
|
src = fs_m_in.m_source;
|
|
error = OK;
|
|
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;
|
|
printf("PFS: bad request (no VFS_BASE) %d\n", req_nr);
|
|
}
|
|
ind = req_nr - VFS_BASE;
|
|
|
|
if (ind < 0 || ind >= NREQS) {
|
|
printf("pfs: bad request %d\n", req_nr);
|
|
error = EINVAL;
|
|
} else {
|
|
error = (*fs_call_vec[ind])();
|
|
}
|
|
|
|
fs_m_out.m_type = error;
|
|
reply(src, &fs_m_out);
|
|
|
|
}
|
|
return(OK);
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* sef_local_startup *
|
|
*===========================================================================*/
|
|
PRIVATE void sef_local_startup()
|
|
{
|
|
/* Register init callbacks. */
|
|
sef_setcb_init_fresh(sef_cb_init_fresh);
|
|
sef_setcb_init_restart(sef_cb_init_fail);
|
|
|
|
/* No live update support for now. */
|
|
|
|
/* Register signal callbacks. */
|
|
sef_setcb_signal_handler(sef_cb_signal_handler);
|
|
|
|
/* Let SEF perform startup. */
|
|
sef_startup();
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* sef_cb_init_fresh *
|
|
*===========================================================================*/
|
|
PRIVATE int sef_cb_init_fresh(int type, sef_init_info_t *info)
|
|
{
|
|
/* Initialize the pipe file server. */
|
|
int i;
|
|
|
|
/* Initialize main loop parameters. */
|
|
exitsignaled = 0; /* No exit request seen yet. */
|
|
busy = 0; /* Server is not 'busy' (i.e., inodes in use). */
|
|
|
|
/* Init inode table */
|
|
for (i = 0; i < NR_INODES; ++i) {
|
|
inode[i].i_count = 0;
|
|
}
|
|
|
|
init_inode_cache();
|
|
|
|
SELF_E = getprocnr();
|
|
buf_pool();
|
|
|
|
return(OK);
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* sef_cb_signal_handler *
|
|
*===========================================================================*/
|
|
PRIVATE void sef_cb_signal_handler(int signo)
|
|
{
|
|
/* Only check for termination signal, ignore anything else. */
|
|
if (signo != SIGTERM) return;
|
|
|
|
exitsignaled = 1;
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* get_work *
|
|
*===========================================================================*/
|
|
PRIVATE void get_work(m_in)
|
|
message *m_in; /* pointer to message */
|
|
{
|
|
int r, srcok = 0;
|
|
endpoint_t src;
|
|
|
|
do {
|
|
if ((r = sef_receive(ANY, m_in)) != OK) /* wait for message */
|
|
panic("sef_receive failed: %d", r);
|
|
src = m_in->m_source;
|
|
|
|
if(src == VFS_PROC_NR) {
|
|
srcok = 1; /* Normal FS request. */
|
|
} else
|
|
printf("PFS: unexpected source %d\n", src);
|
|
} while(!srcok);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* reply *
|
|
*===========================================================================*/
|
|
PUBLIC void reply(who, m_out)
|
|
endpoint_t who;
|
|
message *m_out; /* report result */
|
|
{
|
|
if (OK != send(who, m_out)) /* send the message */
|
|
printf("PFS(%d) was unable to send reply\n", SELF_E);
|
|
}
|
|
|