20060303a

1 files changed, 285 insertions, 0 deletions

diff --git a/liblogfs/conv.c b/liblogfs/conv.c
new file mode 100644
index 00000000..fbc48130
--- /dev/null
+++ b/liblogfs/conv.c
@@ -0,0 +1,285 @@
+#include "lib9.h"
+#include "logfs.h"
+#include "local.h"
+#include "fcall.h"
+
+static void
+pn(uchar **pp, char *v)
+{
+	uchar *p = *pp;
+	int l;
+	l = v ? strlen(v) : 0;
+	PBIT16(p, l); p += BIT16SZ;
+	memmove(p, v, l);
+	p += l;
+	*pp = p;
+}
+
+static uint
+sn(char *p)
+{
+	if(p == nil)
+		return BIT16SZ;
+	return strlen(p) + BIT16SZ;
+}
+
+uint
+logfsconvM2S(uchar *ap, uint nap, LogMessage *f)
+{
+	uchar *p = ap;
+	uchar *ep = p + nap;
+	uchar *mep;
+	uint size;
+//print("conv(%d)\n", nap);
+	if(p + 1 > ep)
+		return 0;
+	f->type = *p++;
+//print("type %c\n", f->type);
+	switch(f->type) {
+	case LogfsLogTstart:
+	case LogfsLogTcreate:
+	case LogfsLogTtrunc:
+	case LogfsLogTremove:
+	case LogfsLogTwrite:
+	case LogfsLogTwstat:
+		break;
+	case LogfsLogTend:
+		return 1;
+	default:	
+		return 0;
+	}
+	if(p + BIT16SZ > ep)
+		return 0;
+	size = GBIT16(p); p += BIT16SZ;
+//print("size %ud\n", size);
+	if(p + size > ep)
+		return 0;
+	mep = p + size;
+	if(p + BIT32SZ > mep)
+		return 0;
+	f->path = GBIT32(p); p += BIT32SZ;
+	switch(f->type) {
+	case LogfsLogTstart:
+		/* 's' size[2] path[4] nerase[4] */
+		if(p + BIT32SZ > ep)
+			return 0;
+		f->u.start.nerase = GBIT32(p); p += BIT32SZ;
+		break;
+	case LogfsLogTcreate:
+		/* 'c' size[2] path[4] perm[4] newpath[4] mtime[4] cvers[4] name[s] uid[s] gid[s] */
+		if(p + 4 * BIT32SZ > mep)
+			return 0;
+		f->u.create.perm = GBIT32(p); p+= BIT32SZ;
+		f->u.create.newpath = GBIT32(p); p+= BIT32SZ;
+		f->u.create.mtime = GBIT32(p); p+= BIT32SZ;
+		f->u.create.cvers = GBIT32(p); p+= BIT32SZ;
+		if(!logfsgn(&p, mep, &f->u.create.name)
+			|| !logfsgn(&p, mep, &f->u.create.uid)
+			|| !logfsgn(&p, mep, &f->u.create.gid))
+			return 0;
+		break;
+	case LogfsLogTremove:
+		/* 'r' size[2] path[4] mtime[4] muid[s] */
+		if(p + BIT32SZ > mep)
+			return 0;
+		f->u.remove.mtime = GBIT32(p); p += BIT32SZ;
+		if(!logfsgn(&p, mep, &f->u.remove.muid))
+			return 0;
+		break;
+	case LogfsLogTtrunc:
+		/* 't' size[2] path[4] mtime[4] cvers[4] muid[s] */
+		if(p + 2 * BIT32SZ > mep)
+			return 0;
+		f->u.trunc.mtime = GBIT32(p); p += BIT32SZ;
+		f->u.trunc.cvers = GBIT32(p); p += BIT32SZ;
+		if(!logfsgn(&p, mep, &f->u.trunc.muid))
+			return 0;
+		break;
+	case LogfsLogTwrite:
+		/* 'w' size[2] path[4] offset[4] count[2] mtime[4] cvers[4] muid[s] flashaddr[4] [data[n]] */
+		if(p + BIT32SZ + BIT16SZ + 2 * BIT32SZ > mep)
+			return 0;
+		f->u.write.offset = GBIT32(p); p += BIT32SZ;
+		f->u.write.count = GBIT16(p); p += BIT16SZ;
+		f->u.write.mtime = GBIT32(p); p += BIT32SZ;
+		f->u.write.cvers = GBIT32(p); p += BIT32SZ;
+		if(!logfsgn(&p, mep, &f->u.write.muid))
+			return 0;
+		if(p + BIT32SZ > mep)
+			return 0;
+		f->u.write.flashaddr = GBIT32(p); p += BIT32SZ;
+		if(f->u.write.flashaddr & LogAddr) {
+			if(p + f->u.write.count > mep)
+				return 0;
+			f->u.write.data = p;
+			p += f->u.write.count;
+		}
+		else
+			f->u.write.data = nil;
+		break;
+	case LogfsLogTwstat:
+		/* 'W' size[2] path[4] name[s] perm[4] uid[s] gid[s] mtime[4] muid[s] or */
+		/* 'W' size[2] path[4] name[s] perm[4] gid[s] mtime[4] muid[s] */
+		if(!logfsgn(&p, mep, &f->u.wstat.name))
+			return 0;
+		if(p + BIT32SZ > mep)
+			return 0;
+		f->u.wstat.perm = GBIT32(p); p += BIT32SZ;
+		if(!logfsgn(&p, mep, &f->u.wstat.uid))
+			return 0;
+		if(!logfsgn(&p, mep, &f->u.wstat.gid))
+			return 0;
+		if(p + BIT32SZ > mep)
+			return 0;
+		f->u.wstat.mtime = GBIT32(p); p += BIT32SZ;
+		if(!logfsgn(&p, mep, &f->u.wstat.muid))
+			return 0;
+		break;
+	default:
+		return 0;
+	}
+	if(p != mep)
+		return 0;
+	return p - ap;
+}
+
+uint
+logfssizeS2M(LogMessage *m)
+{
+	switch(m->type) {
+	case LogfsLogTend:
+		return 1;
+	case LogfsLogTstart:
+		return 11;
+	case LogfsLogTcreate:
+		/* 'c' size[2] path[4] perm[4] newpath[4] mtime[4] cvers[4] name[s] uid[s] gid[s] */
+		return 1 + BIT16SZ + 5 * BIT32SZ
+			+ sn(m->u.create.name) + sn(m->u.create.uid) + sn(m->u.create.gid);
+	case LogfsLogTremove:
+		/* 'r' size[2] path[4] mtime[4] muid[s] */
+		return 1 + BIT16SZ + 2 * BIT32SZ + sn(m->u.remove.muid);
+	case LogfsLogTtrunc:
+		/* 't' size[2] path[4] mtime[4] cvers[4] muid[s] */
+		return 1 + BIT16SZ + 3 * BIT32SZ + sn(m->u.trunc.muid);
+	case LogfsLogTwrite:
+		/* 'w' size[2] path[4] offset[4] count[2] mtime[4] cvers[4] muid[s] flashaddr[4] [data[n]] */
+		return 1 + BIT16SZ + 2 * BIT32SZ + BIT16SZ + 2 * BIT32SZ + sn(m->u.write.muid)
+			+ BIT32SZ + (m->u.write.data ? m->u.write.count : 0);
+	case LogfsLogTwstat:
+		/* 'W' size[2] path[4] name[s] perm[4] uid[s] gid[s] mtime[4] muid[s] */
+		/* 'W' size[2] path[4] name[s] perm[4] gid[s] mtime[4] muid[s] */
+		return 1 + BIT16SZ + BIT32SZ + sn(m->u.wstat.name) + BIT32SZ
+			+ sn(m->u.wstat.uid)
+			+ sn(m->u.wstat.gid) + BIT32SZ + sn(m->u.wstat.muid);
+	default:
+		return 0;
+	}
+}
+
+uint
+logfsconvS2M(LogMessage *s, uchar *ap, uint nap)
+{
+	uint size;
+	uchar *p;
+	size = logfssizeS2M(s);
+	if(size == 0 || size > nap)
+		return 0;
+	p = ap;
+	*p++ = s->type;
+	if(s->type == LogfsLogTend)
+		return 1;
+	size -= 1 + BIT16SZ;
+	PBIT16(p, size); p += BIT16SZ;
+	PBIT32(p, s->path); p += BIT32SZ;
+	switch(s->type) {
+	case LogfsLogTstart:
+		PBIT32(p, s->u.start.nerase); p += BIT32SZ;
+		break;
+	case LogfsLogTcreate:
+		/* 'c' size[2] path[4] perm[4] newpath[4] mtime[4] cvers[4] name[s] uid[s] gid[s] */
+		PBIT32(p, s->u.create.perm); p += BIT32SZ;
+		PBIT32(p, s->u.create.newpath); p += BIT32SZ;
+		PBIT32(p, s->u.create.mtime); p += BIT32SZ;
+		PBIT32(p, s->u.create.cvers); p += BIT32SZ;
+		pn(&p, s->u.create.name);
+		pn(&p, s->u.create.uid);
+		pn(&p, s->u.create.gid);
+		break;
+	case LogfsLogTremove:
+		/* 'r' size[2] path[4] mtime[4] muid[s] */
+		PBIT32(p, s->u.remove.mtime); p += BIT32SZ;
+		pn(&p, s->u.remove.muid);
+		break;
+	case LogfsLogTtrunc:
+		/* 't' size[2] path[4] mtime[4] cvers[4] muid[s] */
+		PBIT32(p, s->u.trunc.mtime); p += BIT32SZ;
+		PBIT32(p, s->u.trunc.cvers); p += BIT32SZ;
+		pn(&p, s->u.trunc.muid);
+		break;
+	case LogfsLogTwrite:
+		/* 'w' size[2] path[4] offset[4] count[2] mtime[4] cvers[4] muid[s] flashaddr[4] [data[n]] */
+		PBIT32(p, s->u.write.offset); p += BIT32SZ;
+		PBIT16(p, s->u.write.count); p += BIT16SZ;
+		PBIT32(p, s->u.write.mtime); p += BIT32SZ;
+		PBIT32(p, s->u.write.cvers); p += BIT32SZ;
+		pn(&p, s->u.write.muid);
+		PBIT32(p, s->u.write.flashaddr); p += BIT32SZ;
+		if(s->u.write.data) {
+			memmove(p, s->u.write.data, s->u.write.count);
+			p += s->u.write.count;
+		}
+		break;
+	case LogfsLogTwstat:
+		/* 'W' size[2] path[4] name[s] perm[4] uid[s] gid[s] mtime[4] muid[s] */
+		/* 'W' size[2] path[4] name[s] perm[4] gid[s] mtime[4] muid[s] */
+		pn(&p, s->u.wstat.name);
+		PBIT32(p, s->u.wstat.perm); p += BIT32SZ;
+		pn(&p, s->u.wstat.uid);
+		pn(&p, s->u.wstat.gid);
+		PBIT32(p, s->u.wstat.mtime); p+= BIT32SZ;
+		pn(&p, s->u.wstat.muid);
+		break;
+	default:
+		return 0;
+	}
+	return p - ap;
+}
+		
+void
+logfsdumpS(LogMessage *m)
+{
+	switch(m->type) {
+	case LogfsLogTend:
+		print("LogfsLogTend()");
+		break;
+	case LogfsLogTstart:
+		print("LogfsLogTstart(path=%ud, nerase=%ud)", m->path, m->u.start.nerase);
+		break;
+	case LogfsLogTcreate:
+		print("LogfsLogTcreate(path=%ud, perm=0%uo, newpath=%ud, mtime=%ud, cvers=%ud, name=%s, uid=%s, gid=%s)",
+			m->path, m->u.create.perm, m->u.create.newpath, m->u.create.mtime, m->u.create.cvers,
+			m->u.create.name, m->u.create.uid, m->u.create.gid);
+		break;
+	case LogfsLogTremove:
+		print("LogfsLogTremove(path=%ud, mtime=%ud, muid=%s)",
+			m->path, m->u.remove.mtime, m->u.remove.muid);
+		break;
+	case LogfsLogTtrunc:
+		print("LogfsLogTtrunc(path=%ud, mtime=%ud, cvers=%ud, muid=%s)",
+			m->path, m->u.trunc.mtime, m->u.trunc.cvers, m->u.trunc.muid);
+		break;
+	case LogfsLogTwrite:
+		print("LogfsLogTwrite(path=%ud, offset=%ud, count=%ud, mtime=%ud, cvers=%ud, muid=%s, flashaddr=0x%.8ux)",
+			m->path, m->u.write.offset, m->u.write.count, m->u.write.mtime, m->u.write.cvers, m->u.write.muid,
+			m->u.write.flashaddr);
+		break;
+	case LogfsLogTwstat:
+		print("LogfsLogTwstat(path=%ud, name=%s, perm=0%uo, uid=%s, gid=%s, mtime=%ud, muid=%s)",
+			m->path, m->u.wstat.name, m->u.wstat.perm, m->u.wstat.uid, m->u.wstat.gid,
+			m->u.wstat.mtime, m->u.wstat.muid);
+		break;
+	default:
+		print("LogfsLogTother(%c)", m->type);
+		break;
+	}
+}