#include	"all.h"

void
p9fcall(Chan *cp, Fcall *in, Fcall *ou)
{
	int t;

	rlock(&mainlock);
	t = in->type;
	if(t < 0 || t >= MAXSYSCALL || (t&1) || !p9call[t]) {
		print("bad message type %d\n", t);
		panic("");
	}
	ou->type = t+1;
	ou->err = 0;

	rlock(&cp->reflock);

	(*p9call[t])(cp, in, ou);

	runlock(&cp->reflock);

	cons.work.count++;
	runlock(&mainlock);
}

int
con_session(void)
{
	Fcall in, ou;

	in.type = Tsession;
	p9fcall(cons.chan, &in, &ou);
	return ou.err;
}

int
con_attach(int fid, char *uid, char *arg)
{
	Fcall in, ou;

	in.type = Tattach;
	in.fid = fid;
	strncpy(in.uname, uid, NAMELEN);
	strncpy(in.aname, arg, NAMELEN);
	p9fcall(cons.chan, &in, &ou);
	return ou.err;
}

int
con_clone(int fid1, int fid2)
{
	Fcall in, ou;

	in.type = Tclone;
	in.fid = fid1;
	in.newfid = fid2;
	p9fcall(cons.chan, &in, &ou);
	return ou.err;
}

int
con_path(int fid, char *path)
{
	Fcall in, ou;
	char *p;

	in.type = Twalk;
	in.fid = fid;

loop:
	if(*path == 0)
		return 0;
	strncpy(in.name, path, NAMELEN);
	if(p = strchr(path, '/')) {
		path = p+1;
		if(p = strchr(in.name, '/'))
			*p = 0;
	} else
		path = strchr(path, 0);
	if(in.name[0]) {
		p9fcall(cons.chan, &in, &ou);
		if(ou.err)
			return ou.err;
	}
	goto loop;
}

int
con_walk(int fid, char *name)
{
	Fcall in, ou;

	in.type = Twalk;
	in.fid = fid;
	strncpy(in.name, name, NAMELEN);
	p9fcall(cons.chan, &in, &ou);
	return ou.err;
}

int
con_stat(int fid, char *data)
{
	Fcall in, ou;

	in.type = Tstat;
	in.fid = fid;
	p9fcall(cons.chan, &in, &ou);
	if(ou.err == 0)
		memcpy(data, ou.stat, sizeof ou.stat);
	return ou.err;
}

int
con_wstat(int fid, char *data)
{
	Fcall in, ou;

	in.type = Twstat;
	in.fid = fid;
	memcpy(in.stat, data, sizeof in.stat);
	p9fcall(cons.chan, &in, &ou);
	return ou.err;
}

int
con_open(int fid, int mode)
{
	Fcall in, ou;

	in.type = Topen;
	in.fid = fid;
	in.mode = mode;
	p9fcall(cons.chan, &in, &ou);
	return ou.err;
}

int
con_read(int fid, char *data, long offset, int count)
{
	Fcall in, ou;

	in.type = Tread;
	in.fid = fid;
	in.offset = offset;
	in.count = count;
	ou.data = data;
	p9fcall(cons.chan, &in, &ou);
	if(ou.err)
		return 0;
	return ou.count;
}

int
con_write(int fid, char *data, long offset, int count)
{
	Fcall in, ou;

	in.type = Twrite;
	in.fid = fid;
	in.data = data;
	in.offset = offset;
	in.count = count;
	p9fcall(cons.chan, &in, &ou);
	if(ou.err)
		return 0;
	return ou.count;
}

int
con_remove(int fid)
{
	Fcall in, ou;

	in.type = Tremove;
	in.fid = fid;
	p9fcall(cons.chan, &in, &ou);
	return ou.err;
}

int
con_create(int fid, char *name, int uid, int gid, long perm, int mode)
{
	Fcall in, ou;

	in.type = Tcreate;
	in.fid = fid;
	strncpy(in.name, name, NAMELEN);
	in.perm = perm;
	in.mode = mode;
	cons.uid = uid;			/* beyond ugly */
	cons.gid = gid;
	p9fcall(cons.chan, &in, &ou);
	return ou.err;
}

int
doclri(File *f)
{
	Iobuf *p, *p1;
	Dentry *d, *d1;
	int err;

	err = 0;
	p = 0;
	p1 = 0;
	if(isro(f->fs->dev)) {
		err = Eronly;
		goto out;
	}
	/*
	 * check on parent directory of file to be deleted
	 */
	if(f->wpath == 0 || f->wpath->addr == f->addr) {
		err = Ephase;
		goto out;
	}
	p1 = getbuf(f->fs->dev, f->wpath->addr, Bread);
	d1 = getdir(p1, f->wpath->slot);
	if(!d1 || checktag(p1, Tdir, QPNONE) || !(d1->mode & DALLOC)) {
		err = Ephase;
		goto out;
	}

	accessdir(p1, d1, FWRITE);
	putbuf(p1);
	p1 = 0;

	/*
	 * check on file to be deleted
	 */
	p = getbuf(f->fs->dev, f->addr, Bread);
	d = getdir(p, f->slot);


	/*
	 * do it
	 */
	memset(d, 0, sizeof(Dentry));
	settag(p, Tdir, QPNONE);
	freewp(f->wpath);
	freefp(f);

out:
	if(p1)
		putbuf(p1);
	if(p)
		putbuf(p);
	return err;
}

void
f_clri(Chan *cp, Fcall *in, Fcall *ou)
{
	File *f;

	if(CHAT(cp)) {
		print("c_clri %d\n", cp->chan);
		print("	fid = %d\n", in->fid);
	}

	f = filep(cp, in->fid, 0);
	if(!f) {
		ou->err = Efid;
		goto out;
	}
	ou->err = doclri(f);

out:
	ou->fid = in->fid;
	if(f)
		qunlock(f);
}

int
con_clri(int fid)
{
	Fcall in, ou;
	Chan *cp;

	in.type = Tremove;
	in.fid = fid;
	cp = cons.chan;

	rlock(&mainlock);
	ou.type = Tremove+1;
	ou.err = 0;

	rlock(&cp->reflock);

	f_clri(cp, &in, &ou);

	runlock(&cp->reflock);

	cons.work.count++;
	runlock(&mainlock);
	return ou.err;
}