Npcpool *
npc_create_pool(u32 maxid)
{
Npcpool *p;
p = malloc(sizeof(*p));
if (!p) {
np_werror(Ennomem, ENOMEM);
return NULL;
}
p->maxid = maxid;
pthread_mutex_init(&p->lock, NULL);
pthread_cond_init(&p->cond, NULL);
p->msize = 32; /* 256 ids */
p->map = malloc(p->msize);
if (!p->map) {
np_werror(Ennomem, ENOMEM);
free(p);
return NULL;
}
memset(p->map, 0, p->msize);
return p;
}
static Npfcall *
np_auth(Npreq *req, Npfcall *tc)
{
Npconn *conn;
Npfid *afid;
Npfcall *rc;
rc = NULL;
conn = req->conn;
afid = np_fid_find(conn, tc->afid);
if (afid) {
np_werror(Einuse, EIO);
goto done;
}
afid = np_fid_create(conn, tc->afid, NULL);
if (!afid) {
np_werror(Enomem, ENOMEM);
goto done;
}
if (conn->srv->auth)
rc = (*conn->srv->auth->auth)(afid, &tc->uname, &tc->aname);
else
np_werror(Enoauth, EIO);
afid->type = Qtauth;
done:
np_fid_decref(afid);
return rc;
}
static Npfcall*
np_default_version(Npconn *conn, u32 msize, Npstr *version)
{
int dotu;
char *ver;
Npfcall *rc;
if (msize > conn->srv->msize)
msize = conn->srv->msize;
dotu = 0;
if (np_strcmp(version, "9P2000.u")==0 && conn->srv->dotu) {
ver = "9P2000.u";
dotu = 1;
} else if (np_strncmp(version, "9P2000", 6) == 0)
ver = "9P2000";
else
ver = NULL;
if (msize < IOHDRSZ)
np_werror("msize too small", EIO);
else if (ver) {
np_conn_reset(conn, msize, dotu);
rc = np_create_rversion(msize, ver);
} else
np_werror("unsupported 9P version", EIO);
return rc;
}
static Npfcall *
np_open(Npreq *req, Npfcall *tc)
{
Npconn *conn;
Npfid *fid;
Npfcall *rc;
rc = NULL;
conn = req->conn;
fid = np_fid_find(conn, tc->fid);
if (!fid) {
np_werror(Eunknownfid, EIO);
goto done;
} else
np_fid_incref(fid);
req->fid = fid;
if (fid->omode != (u16)~0) {
np_werror(Ebadusefid, EIO);
goto done;
}
if (fid->type&Qtdir && tc->mode != Oread) {
np_werror(Eperm, EPERM);
goto done;
}
rc = (*conn->srv->open)(fid, tc->mode);
fid->omode = tc->mode;
done:
np_fid_decref(fid);
return rc;
}
static Npfcall *
np_attach(Npreq *req, Npfcall *tc)
{
Npconn *conn;
Npfid *fid, *afid;
Npfcall *rc;
rc = NULL;
conn = req->conn;
afid = NULL;
/* the fid that the connecting client wants to call root */
fid = np_fid_find(conn, tc->fid);
/* if this fid exists then report error */
if (fid) {
np_werror(Einuse, EIO);
goto done;
}
/* create a fid structure for the root */
fid = np_fid_create(conn, tc->fid, NULL);
if (!fid) {
np_werror(Enomem, ENOMEM);
goto done;
} else
/* maintain a reference count for fid */
np_fid_incref(fid);
req->fid = fid;
afid = np_fid_find(conn, tc->afid);
if (!afid) {
if (tc->afid!=NOFID) {
np_werror(Eunknownfid, EIO);
goto done;
}
if (!afid->type&Qtauth) {
np_werror(Ebadusefid, EIO);
goto done;
}
} else
np_fid_incref(afid);
if (conn->srv->auth) {
rc = (*conn->srv->auth->attach)(afid, &tc->uname, &tc->aname);
if (rc)
goto done;
}
rc = (*conn->srv->attach)(fid, afid, &tc->uname, &tc->aname);
done:
np_fid_decref(fid);
np_fid_decref(afid);
return rc;
}
static Npfcall *
np_read(Npreq *req, Npfcall *tc)
{
Npconn *conn;
Npfid *fid;
Npfcall *rc;
rc = NULL;
conn = req->conn;
fid = np_fid_find(conn, tc->fid);
if (!fid) {
np_werror(Eunknownfid, EIO);
goto error;
} else
np_fid_incref(fid);
req->fid = fid;
if (tc->count+IOHDRSZ > conn->msize) {
np_werror(Etoolarge, EIO);
goto error;
}
if (fid->type&Qtauth) {
if (conn->srv->auth)
rc = conn->srv->auth->read(fid, tc->offset, tc->count);
else
np_werror(Ebadusefid, EIO);
goto error;
}
if (fid->omode==(u16)~0 || (fid->omode&3)==Owrite) {
np_werror(Ebadusefid, EIO);
goto error;
}
if (fid->type&Qtdir && tc->offset != fid->diroffset) {
np_werror(Ebadoffset, EIO);
goto error;
}
rc = (*conn->srv->read)(fid, tc->offset, tc->count, req);
/*
if (rc && rc->id==Rread && fid->type&Qtdir) {
fid->diroffset = tc->offset + rc->count;
}
*/
if (rc || np_haserror())
np_fid_decref(fid);
return rc;
error:
np_fid_decref(fid);
return NULL;
}
static Npfcall *
np_create(Npreq *req, Npfcall *tc)
{
Npconn *conn;
Npfid *fid;
Npfcall *rc;
rc = NULL;
conn = req->conn;
fid = np_fid_find(conn, tc->fid);
if (!fid) {
np_werror(Eunknownfid, EIO);
goto done;
} else
np_fid_incref(fid);
req->fid = fid;
if (fid->omode != (u16)~0) {
np_werror(Ebadusefid, EIO);
goto done;
}
if (!fid->type&Qtdir) {
np_werror(Enotdir, ENOTDIR);
goto done;
}
if (tc->perm&Dmdir && tc->mode!=Oread) {
np_werror(Eperm, EPERM);
goto done;
}
if (tc->perm&(Dmnamedpipe|Dmsymlink|Dmlink|Dmdevice|Dmsocket)
&& !fid->conn->dotu) {
np_werror(Eperm, EPERM);
goto done;
}
rc = (*conn->srv->create)(fid, &tc->name, tc->perm, tc->mode,
&tc->extension);
if (rc && rc->id == Rcreate) {
fid->omode = tc->mode;
fid->type = rc->qid.type;
}
done:
np_fid_decref(fid);
return rc;
}
static Npfcall *
np_write(Npreq *req, Npfcall *tc)
{
Npconn *conn;
Npfid *fid;
Npfcall *rc;
rc = NULL;
conn = req->conn;
fid = np_fid_find(conn, tc->fid);
if (!fid) {
np_werror(Eunknownfid, EIO);
goto error;
} else
np_fid_incref(fid);
req->fid = fid;
if (fid->type&Qtauth) {
if (conn->srv->auth) {
rc = conn->srv->auth->write(fid, tc->offset,
tc->count, tc->data);
np_fid_decref(fid);
return rc;
} else {
np_werror(Ebadusefid, EIO);
goto error;
}
}
if (fid->omode==(u16)~0 || fid->type&Qtdir || (fid->omode&3)==Oread) {
np_werror(Ebadusefid, EIO);
goto error;
}
if (tc->count+IOHDRSZ > conn->msize) {
np_werror(Etoolarge, EIO);
goto error;
}
rc = (*conn->srv->write)(fid, tc->offset, tc->count, tc->data, req);
if (rc || np_haserror())
np_fid_decref(fid);
return rc;
error:
np_fid_decref(fid);
return NULL;
}
void
np_uerror(int ecode)
{
char buf[256];
strerror_r(ecode, buf, sizeof(buf));
np_werror(buf, ecode);
}
void
np_suerror(char *s, int ecode)
{
char err[256];
char buf[512];
strerror_r(ecode, err, sizeof(err));
snprintf(buf, sizeof(buf), "%s: %s", s, err);
np_werror(buf, ecode);
}
void *
np_malloc(int size)
{
void *ret;
ret = malloc(size);
if (!ret)
np_werror(Ennomem, ENOMEM);
return ret;
}
static Npfcall *
np_clunk(Npreq *req, Npfcall *tc)
{
Npconn *conn;
Npfid *fid;
Npfcall *rc;
rc = NULL;
conn = req->conn;
fid = np_fid_find(conn, tc->fid);
if (!fid) {
np_werror(Eunknownfid, EIO);
goto done;
} else
np_fid_incref(fid);
req->fid = fid;
if (fid->type&Qtauth) {
if (conn->srv->auth)
rc = conn->srv->auth->clunk(fid);
else
np_werror(Ebadusefid, EIO);
goto done;
}
if (fid->omode!=(u16)~0 && fid->omode==Orclose) {
rc = (*conn->srv->remove)(fid);
if (rc->id == Rerror)
goto done;
free(rc);
rc = np_create_rclunk();
} else
rc = (*conn->srv->clunk)(fid);
done:
np_fid_decref(fid);
return rc;
}
static Npfcall *
np_wstat(Npreq *req, Npfcall *tc)
{
Npconn *conn;
Npfid *fid;
Npfcall *rc;
Npstat *stat;
rc = NULL;
conn = req->conn;
stat = &tc->stat;
fid = np_fid_find(conn, tc->fid);
if (!fid) {
np_werror(Eunknownfid, EIO);
goto done;
} else
np_fid_incref(fid);
req->fid = fid;
if (stat->type != (u16)~0 || stat->dev != (u32)~0
|| stat->qid.version != (u32)~0
|| stat->qid.path != (u64)~0 ) {
np_werror(Eperm, EPERM);
goto done;
}
if ((fid->type&Qtdir && !stat->mode&Dmdir)
|| (!fid->type&Qtdir&&stat->mode&Dmdir)) {
np_werror(Edirchange, EPERM);
goto done;
}
rc = (*conn->srv->wstat)(fid, &tc->stat);
done:
np_fid_decref(fid);
return rc;
}
static Npfcall*
np_process_request(Npreq *req)
{
Npconn *conn;
Npfcall *tc, *rc;
np_fcall f;
char *ename;
int ecode;
conn = req->conn;
rc = NULL;
tc = req->tcall;
f = NULL;
if (tc->id<Tfirst && tc->id>Rlast)
np_werror("unknown message type", ENOSYS);
else {
// printf("MAINLOOP rcvd msg of type <%d>\n",tc->id);
f = np_fcalls[(tc->id-Tfirst)/2];
}
np_werror(NULL, 0);
if (f)
rc = (*f)(req, tc);
else
np_werror("unsupported message", ENOSYS);
np_rerror(&ename, &ecode);
if (ename != NULL) {
if (rc)
free(rc);
rc = np_create_rerror(ename, ecode, conn->dotu);
}
return rc;
}
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;
}
Npcfid *
npc_fid_alloc(Npcfsys *fs)
{
Npcfid *ret;
ret = malloc(sizeof(*ret));
if (!ret) {
np_werror(Ennomem, ENOMEM);
return NULL;
}
ret->fsys = fs;
ret->fid = npc_get_id(fs->fidpool);
ret->offset = 0;
ret->iounit = 0;
npc_incref_fsys(fs);
return ret;
}
static Npfcall *
np_remove(Npreq *req, Npfcall *tc)
{
Npconn *conn;
Npfid *fid;
Npfcall *rc;
rc = NULL;
conn = req->conn;
fid = np_fid_find(conn, tc->fid);
if (!fid) {
np_werror(Eunknownfid, EIO);
goto done;
} else
np_fid_incref(fid);
req->fid = fid;
rc = (*conn->srv->remove)(fid);
done:
np_fid_decref(fid);
return rc;
}
static Npfcall*
np_default_write(Npfid *fid, u64 offset, u32 count, u8 *data, Npreq *req)
{
np_werror(Enotimpl, ENOSYS);
return NULL;
}
static int
np_default_walk(Npfid *fid, Npstr* wname, Npqid *wqid)
{
np_werror(Enotimpl, ENOSYS);
return 0;
}
static Npfcall*
np_default_open(Npfid *fid, u8 perm)
{
np_werror(Enotimpl, ENOSYS);
return NULL;
}
static Npfcall*
np_default_create(Npfid *fid, Npstr *name, u32 mode, u8 perm, Npstr *extension)
{
np_werror(Enotimpl, ENOSYS);
return NULL;
}
int
npc_dirread(Npcfid *fid, Npwstat **statpp)
{
int i, n, m, buflen, statsz, slen, count;
u8 *buf;
char *sbuf;
Npstat stat;
Npwstat *statp;
buflen = fid->fsys->msize - IOHDRSZ;
buf = malloc(buflen);
if (!buf)
return -1;
n = npc_read(fid, buf, buflen, fid->offset);
if (n < 0) {
free(buf);
return n;
}
fid->offset += n;
count = 0;
i = 0;
slen = 0;
while (i < n) {
statsz = np_deserialize_stat(&stat, buf + i, buflen - i, fid->fsys->dotu);
if (!statsz) {
np_werror("stat error", EIO);
free(buf);
return -1;
}
count++;
slen += npc_wstatlen(&stat);
i += statsz;
}
statp = malloc(slen);
if (!statp) {
np_werror(Ennomem, ENOMEM);
free(buf);
}
sbuf = ((char *) statp) + count * sizeof(Npwstat);
i = 0;
m = 0;
while (i < n) {
statsz = np_deserialize_stat(&stat, buf + i, buflen - i, fid->fsys->dotu);
if (!statsz)
break;
npc_stat2wstat(&stat, &statp[m], &sbuf);
m++;
i += statsz;
}
free(buf);
*statpp = statp;
return count;
}
static Npfcall *
np_walk(Npreq *req, Npfcall *tc)
{
int i;
Npconn *conn;
Npfid *fid, *newfid;
Npfcall *rc;
Npqid wqids[MAXWELEM];
rc = NULL;
conn = req->conn;
newfid = NULL;
fid = np_fid_find(conn, tc->fid);
if (!fid) {
np_werror(Eunknownfid, EIO);
goto done;
} else
np_fid_incref(fid);
req->fid = fid;
if (!fid->type&Qtdir) {
np_werror(Enotdir, ENOTDIR);
goto done;
}
if (fid->omode != (u16) ~0) {
np_werror(Ebadusefid, EIO);
goto done;
}
if (tc->nwname > MAXWELEM) {
np_werror(Etoomanywnames, EIO);
goto done;
}
if (tc->fid != tc->newfid) {
newfid = np_fid_find(conn, tc->newfid);
if (newfid) {
np_werror(Einuse, EIO);
goto done;
}
newfid = np_fid_create(conn, tc->newfid, NULL);
if (!newfid) {
np_werror(Enomem, ENOMEM);
goto done;
}
if (!(*conn->srv->clone)(fid, newfid))
goto done;
newfid->user = fid->user;
newfid->type = fid->type;
} else
newfid = fid;
np_fid_incref(newfid);
for(i = 0; i < tc->nwname;) {
if (!(*conn->srv->walk)(newfid, &tc->wnames[i], &wqids[i]))
break;
newfid->type = wqids[i].type;
i++;
if (i<(tc->nwname) && !newfid->type&Qtdir)
break;
}
if (i==0 && tc->nwname!=0)
goto done;
np_werror(NULL, 0);
if (tc->fid != tc->newfid)
np_fid_incref(newfid);
rc = np_create_rwalk(i, wqids);
done:
np_fid_decref(fid);
np_fid_decref(newfid);
return rc;
}
static Npfcall*
np_default_remove(Npfid *fid)
{
np_werror(Enotimpl, ENOSYS);
return NULL;
}
static Npfcall*
np_default_wstat(Npfid *fid, Npstat *stat)
{
np_werror(Enotimpl, ENOSYS);
return NULL;
}
static Npfcall*
np_default_attach(Npfid *fid, Npfid *afid, Npstr *uname, Npstr *aname)
{
np_werror(Enotimpl, EIO);
return NULL;
}
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;
}