ref: fa9f4c5c6852ce467644f610e77504664cb86af4
dir: /liblogfs/conv.c/
#include "logfsos.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;
}
}