Npcfsys*
npc_start (int rfd, int wfd, int msize, int flags)
{
Npcfsys *fs;
Npfcall *tc = NULL, *rc = NULL;
if ((flags & NPC_MULTI_RPC))
fs = npc_create_mtfsys (rfd, wfd, msize, flags);
else
fs = npc_create_fsys (rfd, wfd, msize, flags);
if (!fs)
goto done;
if (!(tc = np_create_tversion (msize, "9P2000.L"))) {
np_uerror (ENOMEM);
goto done;
}
if (fs->rpc (fs, tc, &rc) < 0)
goto done;
if (rc->u.rversion.msize < msize)
fs->msize = rc->u.rversion.msize;
if (np_strcmp (&rc->u.rversion.version, "9P2000.L") != 0) {
np_uerror(EIO);
goto done;
}
done:
if (tc)
free (tc);
if (rc)
free (rc);
if (np_rerror () && fs) {
npc_finish (fs);
fs = NULL;
}
return fs;
}
static void
_send_tversion (Nptrans *t)
{
Npfcall *tc, *rc = _alloc_rc ();
tc = np_create_tversion (TEST_MSIZE, "9P2000.L");
if (!tc)
msg_exit ("oom");
ttrans_rpc (t, tc, rc);
free (tc);
free (rc);
}
static void
test_tversion (void)
{
Npfcall *fc, *fc2;
if (!(fc = np_create_tversion (TEST_MSIZE, "9p2000.L")))
msg_exit ("out of memory");
fc2 = _rcv_buf (fc, P9_TVERSION, __FUNCTION__);
assert (fc->u.tversion.msize == fc2->u.tversion.msize);
assert (np_str9cmp (&fc->u.tversion.version, &fc2->u.tversion.version) == 0);
free (fc);
free (fc2);
}
Npcfsys*
npc_mount(int fd, char *aname, char *uname)
{
Npcfsys *fs;
Npfcall *tc, *rc;
fs = npc_create_fsys(fd, 8216);
if (!fs)
return NULL;
tc = np_create_tversion(8216, "9P2000.u");
if (npc_rpc(fs, tc, &rc) < 0)
goto error;
if (rc->version.len==8 && !memcmp(rc->version.str, "9P2000.u", 8)) {
fs->dotu = 1;
} else if (rc->version.len==6 && !memcmp(rc->version.str, "9P2000", 6)) {
fs->dotu = 0;
} else {
np_werror("unsupported 9P version", EIO);
goto error;
}
free(tc);
free(rc);
tc = rc = NULL;
fs->root = npc_fid_alloc(fs);
if (!fs->root)
goto error;
tc = np_create_tattach(fs->root->fid, NOFID, uname, aname);
if (npc_rpc(fs, tc, &rc) < 0)
goto error;
free(tc);
free(rc);
return fs;
error:
free(tc);
free(rc);
npc_disconnect_fsys(fs);
npc_decref_fsys(fs);
return NULL;
}
static void
_flush_series (Npcfsys *fs, Npcfid *root)
{
Npfcall *rc = NULL, *tc = NULL, *ac = NULL;
u16 tag, flushtag;
int n, i;
struct sigaction sa;
assert (fs->trans != NULL);
sa.sa_flags = 0;
sigemptyset(&sa.sa_mask);
sa.sa_handler = _alarm_clock;
if (sigaction (SIGALRM, &sa, NULL) < 0)
err_exit ("sigaction");
/* write 100 tversions */
for (i = 0; i < 100; i++) {
if (!(tc = np_create_tversion (fs->msize, "9P2000.L")))
msg_exit ("out of memory");
flushtag = tag = npc_get_id(fs->tagpool);
np_set_tag(tc, tag);
n = np_trans_write(fs->trans, tc->pkt, tc->size);
if (n < 0)
errn_exit (np_rerror (), "np_trans_write");
if (n != tc->size)
msg_exit ("np_trans_write came up unexpectedly short");
//msg ("sent tversion tag %d", tc->tag);
free(tc);
}
msg ("sent 100 tversions");
/* flush the most recent */
if (!(ac = np_create_tflush (flushtag)))
msg_exit ("out of memory");
tag = npc_get_id(fs->tagpool);
np_set_tag(ac, tag);
n = np_trans_write(fs->trans, ac->pkt, ac->size);
if (n < 0)
errn_exit (np_rerror (), "np_trans_write");
if (n != ac->size)
msg_exit ("np_trans_write came up unexpectedly short");
//msg ("sent tflush tag %d (flushing tag %d)", ac->tag, flushtag);
free (ac);
msg ("sent 1 tflush");
/* receive up to 101 responses with 1s timeout */
for (i = 0; i < 101; i++) {
if (!(rc = malloc(sizeof(*rc) + fs->msize)))
msg_exit ("out of memory");
rc->pkt = (u8*)rc + sizeof(*rc);
alarm (1);
n = np_trans_read(fs->trans, rc->pkt, fs->msize);
if (n < 0) {
if (errno == EINTR)
break;
errn_exit (np_rerror (), "np_trans_read");
}
alarm (0);
if (n == 0)
msg_exit ("np_trans_read: unexpected EOF");
if (!np_deserialize (rc, rc->pkt))
msg_exit ("failed to deserialize response in one go");
//msg ("received tag %d", rc->tag);
free(rc);
//npc_put_id(fs->tagpool, rc->tag);
}
if (i == 100 || i == 101)
msg ("received 100/101 respones");
else
msg ("received %d responses", i);
}
Npcfsys*
npc_mount(int fd, char *aname, Npuser *user,
int (*auth)(Npcfid *afid, Npuser *user, void *aux), void *aux)
{
Npcfsys *fs;
Npfcall *tc, *rc;
fs = npc_create_fsys(fd, 8216);
if (!fs)
return NULL;
tc = np_create_tversion(8216, "9P2000.u");
if (npc_rpc(fs, tc, &rc) < 0)
goto error;
if (rc->version.len==8 && !memcmp(rc->version.str, "9P2000.u", 8)) {
fs->dotu = 1;
} else if (rc->version.len==6 && !memcmp(rc->version.str, "9P2000", 6)) {
fs->dotu = 0;
} else {
np_werror("unsupported 9P version", EIO);
goto error;
}
free(tc);
free(rc);
tc = rc = NULL;
if (auth) {
fs->afid = npc_fid_alloc(fs);
if (!fs->afid)
goto error;
tc = np_create_tauth(fs->afid->fid, user?user->uname:NULL, aname,
user?user->uid:-1, fs->dotu);
if (npc_rpc(fs, tc, &rc) < 0) {
npc_fid_free(fs->afid);
fs->afid = NULL;
} else if ((*auth)(fs->afid, user, aux) < 0)
goto error;
free(tc);
free(rc);
tc = rc = NULL;
}
fs->root = npc_fid_alloc(fs);
if (!fs->root)
goto error;
tc = np_create_tattach(fs->root->fid, fs->afid?fs->afid->fid:NOFID,
user->uname, aname, user->uid, fs->dotu);
if (npc_rpc(fs, tc, &rc) < 0)
goto error;
free(tc);
free(rc);
return fs;
error:
free(tc);
free(rc);
npc_disconnect_fsys(fs);
npc_decref_fsys(fs);
return NULL;
}
