3 * - gc of file systems (not going to do just yet?)
5 * - configure on amsterdam
20 #define trace if(!tracecalls){}else print
22 typedef struct Ipokay Ipokay;
23 typedef struct Config Config;
24 typedef struct Ctree Ctree;
25 typedef struct Cnode Cnode;
31 uchar mask[IPaddrlen];
47 int encryptedhandles = 1;
58 void timerthread(void*);
59 void timerproc(void*);
61 extern void handleunparse(Fsys*, Nfs3Handle*, Nfs3Handle*, int);
62 extern Nfs3Status handleparse(Nfs3Handle*, Fsys**, Nfs3Handle*, int);
64 Nfs3Status logread(Cnode*, u32int, u64int, uchar**, u32int*, u1int*);
65 Nfs3Status refreshdiskread(Cnode*, u32int, u64int, uchar**, u32int*, u1int*);
66 Nfs3Status refreshconfigread(Cnode*, u32int, u64int, uchar**, u32int*, u1int*);
68 int readconfigfile(Config *cp);
69 void setrootfid(void);
70 int ipokay(uchar *ip, ushort port);
72 u64int unittoull(char*);
77 fprint(2, "usage: vnfs [-LLRVr] [-a addr] [-b blocksize] [-c cachesize] configfile\n");
78 threadexitsall("usage");
82 threadmain(int argc, char **argv)
84 fmtinstall('B', sunrpcfmt);
85 fmtinstall('C', suncallfmt);
86 fmtinstall('F', vtfcallfmt);
87 fmtinstall('H', encodefmt);
88 fmtinstall('I', eipfmt);
89 fmtinstall('V', vtscorefmt);
90 sunfmtinstall(&nfs3prog);
91 sunfmtinstall(&nfsmount3prog);
104 encryptedhandles = 0;
107 if(srv->localonly == 0)
110 srv->localparanoia = 1;
123 addr = EARGF(usage());
126 blocksize = unittoull(EARGF(usage()));
129 cachesize = unittoull(EARGF(usage()));
139 if((z = vtdial(nil)) == nil)
140 sysfatal("vtdial: %r");
142 sysfatal("vtconnect: %r");
143 if((vcache = vtcachealloc(z, blocksize, cachesize)) == nil)
144 sysfatal("vtcache: %r");
146 configfile = argv[0];
147 if(readconfigfile(&config) < 0)
148 sysfatal("readConfig: %r");
151 nfschan = chancreate(sizeof(SunMsg*), 0);
152 mountchan = chancreate(sizeof(SunMsg*), 0);
153 timerchan = chancreate(sizeof(void*), 0);
155 if(sunsrvudp(srv, addr) < 0)
156 sysfatal("starting server: %r");
158 sunsrvthreadcreate(srv, nfs3proc, nfschan);
159 sunsrvthreadcreate(srv, mount3proc, mountchan);
160 sunsrvthreadcreate(srv, timerthread, nil);
161 proccreate(timerproc, nil, 32768);
163 sunsrvprog(srv, &nfs3prog, nfschan);
164 sunsrvprog(srv, &nfsmount3prog, mountchan);
169 #define TWID64 ((u64int)~(u64int)0)
179 n = strtoul(s, &es, 0);
180 if(*es == 'k' || *es == 'K'){
183 }else if(*es == 'm' || *es == 'M'){
186 }else if(*es == 'g' || *es == 'G'){
189 }else if(*es == 't' || *es == 'T'){
201 * We store all the state about which file a client is accessing in
202 * the handle, so that we don't have to maintain any per-client state
203 * ourselves. In order to avoid leaking handles or letting clients
204 * create arbitrary handles, we sign and encrypt each handle with
205 * AES using a key selected randomly when the server starts.
206 * Thus, handles cannot be used across sessions.
208 * The decrypted handles begin with the following header:
210 * sessid[8] random session id chosen at start time
211 * len[4] length of handle that follows
213 * If we're pressed for space in the rest of the handle, we could
214 * probably reduce the amount of sessid bytes. Note that the sessid
215 * bytes must be consistent during a run of vnfs, or else some
216 * clients (e.g., Linux 2.4) eventually notice that successive TLookups
217 * return different handles, and they return "Stale NFS file handle"
218 * errors to system calls in response (even though we never sent
221 * Security woes aside, the fact that we have to shove everything
222 * into the handles is quite annoying. We have to encode, in 40 bytes:
224 * - position in the synthesized config tree
225 * - enough of the path to do glob matching
226 * - position in an archived file system image
228 * and the handles need to be stable across changes in the config file
229 * (though not across server restarts since encryption screws
232 * We encode each of the first two as a 10-byte hash that is
233 * the first half of a SHA1 hash.
239 HeaderSize = SessidSize+4,
240 MaxHandleSize = Nfs3MaxHandleSize - HeaderSize
244 uchar sessid[SessidSize];
247 hencrypt(Nfs3Handle *h)
253 * root handle has special encryption - a single 0 byte - so that it
256 if(h->len == root.len && memcmp(h->h, root.h, root.len) == 0){
262 if(!encryptedhandles)
265 if(h->len > MaxHandleSize){
267 fprint(2, "handle too long: %.*lH\n", h->len, h->h);
268 memset(h->h, 'X', Nfs3MaxHandleSize);
269 h->len = Nfs3MaxHandleSize;
274 memmove(p+HeaderSize, p, h->len);
275 memmove(p, sessid, SessidSize);
276 *(u32int*)(p+SessidSize) = h->len;
277 h->len += HeaderSize;
279 if(encryptedhandles){
280 while(h->len < MaxHandleSize)
283 aesCBCencrypt(h->h, MaxHandleSize, &aes);
288 hdecrypt(Nfs3Handle *h)
292 if(h->len == 1 && h->h[0] == 0){ /* single 0 byte is root */
297 if(!encryptedhandles)
300 if(h->len <= HeaderSize)
301 return Nfs3ErrBadHandle;
302 if(encryptedhandles){
303 if(h->len != MaxHandleSize)
304 return Nfs3ErrBadHandle;
306 aesCBCdecrypt(h->h, h->len, &aes);
308 if(memcmp(h->h, sessid, SessidSize) != 0)
309 return Nfs3ErrStale; /* give benefit of doubt */
310 h->len = *(u32int*)(h->h+SessidSize);
311 if(h->len >= MaxHandleSize-HeaderSize)
312 return Nfs3ErrBadHandle;
313 memmove(h->h, h->h+HeaderSize, h->len);
320 uchar key[32], ivec[AESbsize];
323 *(u32int*)sessid = truerand();
324 for(i=0; i<nelem(key); i+=4)
325 *(u32int*)&key[i] = truerand();
326 for(i=0; i<nelem(ivec); i++)
327 ivec[i] = fastrand();
328 setupAESstate(&aesstate, key, sizeof key, ivec);
334 * The main purpose of the configuration file is to define a tree
335 * in which the archived file system images are mounted.
336 * The tree is stored as Entry structures, defined below.
338 * The configuration file also allows one to define shell-like
339 * glob expressions matching paths that are not to be displayed.
340 * The matched files or directories are shown in directory listings
341 * (could suppress these if we cared) but they cannot be opened,
342 * read, or written, and getattr returns zeroed data.
346 /* sizes used in handles; see nfs server below */
348 FsysHandleOffset = CnodeHandleSize
362 char *name; /* path element */
363 Cnode *parent; /* in tree */
364 Cnode *nextsib; /* in tree */
365 Cnode *kidlist; /* in tree */
366 Cnode *nexthash; /* in hash list */
368 Nfs3Status (*read)(Cnode*, u32int, u64int, uchar**, u32int*, u1int*); /* synthesized read fn */
370 uchar handle[VtScoreSize]; /* sha1(path to here) */
371 ulong mtime; /* mtime for this directory entry */
373 /* fsys overlay on this node */
374 Fsys *fsys; /* cache of memory structure */
375 Nfs3Handle fsyshandle;
376 int isblackhole; /* walking down keeps you here */
380 * if a mount point is inside another file system,
381 * the fsys and fsyshandle above have the old fs info,
382 * the mfsys and mfsyshandle below have the new one.
383 * getattrs must use the old info for consistency.
385 int ismtpt; /* whether there is an fsys mounted here */
386 uchar fsysscore[VtScoreSize]; /* score of fsys image on venti */
387 char *fsysimage; /* raw disk image */
388 Fsys *mfsys; /* mounted file system (nil until walked) */
389 Nfs3Handle mfsyshandle; /* handle to root of mounted fsys */
397 return (s[0]<<2)|(s[1]>>6); /* first 10 bits */
401 mkcnode(Ctree *t, Cnode *parent, char *elem, uint elen, char *path, uint plen)
406 n = emalloc(sizeof *n + elen+1);
407 n->name = (char*)(n+1);
408 memmove(n->name, elem, elen);
412 n->nextsib = parent->kidlist;
416 sha1((uchar*)path, plen, n->handle, nil);
417 h = dumbhash(n->handle);
418 n->nexthash = t->hash[h];
430 for(i=0; i<nelem(t->hash); i++)
431 for(n=t->hash[i]; n; n=n->nexthash)
432 if(n->name[0] != '+')
444 for(i=0; i<nelem(t->hash); i++)
445 for(n=t->hash[i]; n; n=n->nexthash){
447 disksync(n->mfsys->disk);
449 disksync(n->fsys->disk);
460 /* just zero all the garbage and leave it linked into the tree */
461 for(i=0; i<nelem(t->hash); i++){
462 for(n=t->hash[i]; n; n=n->nexthash){
468 memset(n->fsysscore, 0, sizeof n->fsysscore);
471 memset(&n->fsyshandle, 0, sizeof n->fsyshandle);
472 memset(&n->mfsyshandle, 0, sizeof n->mfsyshandle);
478 cnodewalk(Cnode *n, char *name, uint len, int markokay)
482 for(nn=n->kidlist; nn; nn=nn->nextsib)
483 if(strncmp(nn->name, name, len) == 0 && nn->name[len] == 0)
484 if(!nn->mark || markokay)
490 ctreewalkpath(Ctree *t, char *name, ulong createmtime)
501 nextp = strchr(p, '/');
504 if((nn = cnodewalk(n, p, nextp-p, 1)) == nil){
507 nn = mkcnode(t, n, p, nextp-p, name, nextp-name);
508 nn->mtime = createmtime;
523 t = emalloc(sizeof *t);
524 t->root = mkcnode(t, nil, "", 0, "", 0);
526 ctreewalkpath(t, "/+log", time(0))->read = logread;
527 ctreewalkpath(t, "/+refreshdisk", time(0))->read = refreshdiskread;
528 ctreewalkpath(t, "/+refreshconfig", time(0))->read = refreshconfigread;
534 ctreemountfsys(Ctree *t, char *path, ulong time, uchar *score, char *file)
540 n = ctreewalkpath(t, path, time);
542 if(n->ismtpt && (n->fsysimage || memcmp(n->fsysscore, score, VtScoreSize) != 0)){
545 n->fsys = nil; /* leak (might be other refs) */
547 memmove(n->fsysscore, score, VtScoreSize);
549 if(n->ismtpt && (n->fsysimage==nil || strcmp(n->fsysimage, file) != 0)){
552 n->fsys = nil; /* leak (might be other refs) */
554 n->fsysimage = emalloc(strlen(file)+1);
555 strcpy(n->fsysimage, file);
562 cnodebyhandle(Ctree *t, uchar *p)
568 for(n=t->hash[h]; n; n=n->nexthash)
569 if(memcmp(n->handle, p, CnodeHandleSize) == 0)
575 parseipandmask(char *s, uchar *ip, uchar *mask)
582 if(parseip(ip, s) == ~0UL)
585 memset(mask, 0xFF, IPaddrlen);
587 if(isdigit((uchar)*p) && strtol(p, &q, 10)>=0 && *q==0)
589 if(parseipmask(mask, p) == ~0UL)
594 /*fprint(2, "parseipandmask %s => %I %I\n", s, ip, mask); */
599 parsetime(char *s, ulong *time)
606 /* decimal integer is seconds since 1970 */
607 x = strtoul(s, &p, 10);
608 if(x > 0 && *p == 0){
613 /* otherwise expect yyyy/mmdd/hhmm */
614 if(strlen(s) != 14 || s[4] != '/' || s[9] != '/')
617 if(!isdigit((uchar)s[i]) || !isdigit((uchar)s[i+5]) || !isdigit((uchar)s[i+10]))
619 memset(&tm, 0, sizeof tm);
620 tm.year = atoi(s)-1900;
621 if(tm.year < 0 || tm.year > 200)
623 tm.mon = (s[5]-'0')*10+s[6]-'0' - 1;
624 if(tm.mon < 0 || tm.mon > 11)
626 tm.mday = (s[7]-'0')*10+s[8]-'0';
627 if(tm.mday < 0 || tm.mday > 31)
629 tm.hour = (s[10]-'0')*10+s[11]-'0';
630 if(tm.hour < 0 || tm.hour > 23)
632 tm.min = (s[12]-'0')*10+s[13]-'0';
633 if(tm.min < 0 || tm.min > 59)
635 strcpy(tm.zone, "XXX"); /* anything but GMT */
637 print("tm2sec %d/%d/%d/%d/%d\n",
638 tm.year, tm.mon, tm.mday, tm.hour, tm.min);
641 if(0) print("time %lud\n", *time);
647 readconfigfile(Config *cp)
649 char *f[10], *image, *p, *pref, *q, *name;
651 uchar scorebuf[VtScoreSize], *score;
659 if((dir = dirstat(name)) == nil)
661 if(c.mtime == dir->mtime){
665 c.mtime = dir->mtime;
667 if((b = Bopen(name, OREAD)) == nil)
671 * Reuse old tree, garbage collecting entries that
672 * are not mentioned in the new config file.
682 for(; (p=Brdstr(b, '\n', 1)) != nil; free(p)){
684 if((q = strchr(p, '#')) != nil)
686 nf = tokenize(p, f, nelem(f));
689 if(strcmp(f[0], "mount") == 0){
691 werrstr("syntax error: mount /path /dev|score mtime");
695 werrstr("unrooted path %s", f[1]);
701 if(access(f[2], AEXIST) < 0){
702 werrstr("image %s does not exist", f[2]);
707 if(vtparsescore(f[2], &pref, scorebuf) < 0){
708 werrstr("bad score %s", f[2]);
713 if(parsetime(f[3], &time) < 0){
714 fprint(2, "%s:%d: bad time %s\n", name, line, f[3]);
717 ctreemountfsys(c.ctree, f[1], time, score, image);
720 if(strcmp(f[0], "allow") == 0 || strcmp(f[0], "deny") == 0){
722 werrstr("syntax error: allow|deny ip[/mask]");
725 c.ok = erealloc(c.ok, (c.nok+1)*sizeof(c.ok[0]));
726 if(parseipandmask(f[1], c.ok[c.nok].ip, c.ok[c.nok].mask) < 0){
727 werrstr("bad ip[/mask]: %s", f[1]);
730 c.ok[c.nok].okay = (strcmp(f[0], "allow") == 0);
734 werrstr("unknown verb '%s'", f[0]);
736 fprint(2, "%s:%d: %r\n", name, line);
747 ipokay(uchar *ip, ushort port)
750 uchar ipx[IPaddrlen];
753 for(i=0; i<config.nok; i++){
755 maskip(ip, ok->mask, ipx);
756 if(0) fprint(2, "%I & %I = %I (== %I?)\n",
757 ip, ok->mask, ipx, ok->ip);
758 if(memcmp(ipx, ok->ip, IPaddrlen) == 0)
761 if(config.nok == 0) /* all is permitted */
763 /* otherwise default is none allowed */
768 cnodelookup(Ctree *t, Cnode **np, char *name)
775 if((nn = cnodewalk(n, name, strlen(name), 0)) == nil){
776 if(n->ismtpt || n->fsys){
777 if((nn = cnodewalk(n, "", 0, 1)) == nil){
778 nn = mkcnode(t, n, "", 0, (char*)n->handle, SHA1dlen);
791 cnodegetattr(Cnode *n, Nfs3Attr *attr)
793 memset(attr, 0, sizeof *attr);
795 attr->type = Nfs3FileReg;
800 attr->type = Nfs3FileDir;
805 attr->fileid = *(u64int*)n->handle;
806 attr->atime.sec = n->mtime;
807 attr->mtime.sec = n->mtime;
808 attr->ctime.sec = n->mtime;
813 cnodereaddir(Cnode *n, u32int count, u64int cookie, uchar **pdata, u32int *pcount, u1int *peof)
815 uchar *data, *p, *ep, *np;
830 data = emalloc(count);
834 if(n->mark || n->name[0] == '+'){
840 ne.namelen = strlen(n->name);
841 ne.cookie = ++cookie;
842 ne.fileid = *(u64int*)n->handle;
843 if(nfs3entrypack(p, ep, &np, &ne) < 0)
868 /* refreshconfig(); */
873 * Actually serve the NFS requests. Called from nfs3srv.c.
874 * Each request runs in its own thread (coroutine).
876 * Decrypted handles have the form:
878 * config[20] - SHA1 hash identifying a config tree node
879 * glob[10] - SHA1 hash prefix identifying a glob state
880 * fsyshandle[<=10] - disk file system handle (usually 4 bytes)
884 * A fid represents a point in the file tree.
885 * There are three components, all derived from the handle:
887 * - config tree position (also used to find fsys)
888 * - glob state for exclusions
889 * - file system position
899 typedef struct Fid Fid;
904 Nfs3Handle fsyshandle;
908 handlecmp(Nfs3Handle *h, Nfs3Handle *h1)
910 if(h->len != h1->len)
911 return h->len - h1->len;
912 return memcmp(h->h, h1->h, h->len);
916 handletofid(Nfs3Handle *eh, Fid *fid, int mode)
923 Nfs3Handle h2, *h, *fh;
925 memset(fid, 0, sizeof *fid);
931 * Not necessary, but speeds up ls -l /dump/2005
932 * HAttr and HAccess must be handled the same way
933 * because both can be used to fetch attributes.
934 * Acting differently yields inconsistencies at mount points,
935 * and causes FreeBSD ls -l to fail.
937 if(mode == HAttr || mode == HAccess)
945 if((ok = hdecrypt(h)) != Nfs3Ok)
947 trace("handletofid: decrypted %.*lH\n", h->len, h->h);
948 if(h->len < FsysHandleOffset)
949 return Nfs3ErrBadHandle;
952 * Find place in config tree.
954 if((n = cnodebyhandle(config.ctree, h->h)) == nil)
958 if(n->ismtpt && domount){
960 * Open fsys for mount point if needed.
963 trace("handletofid: mounting %V/%s\n", n->fsysscore, n->fsysimage);
965 if(strcmp(n->fsysimage, "/dev/null") == 0)
967 if((disk = diskopenfile(n->fsysimage)) == nil){
968 fprint(2, "cannot open disk %s: %r\n", n->fsysimage);
971 if((cdisk = diskcache(disk, blocksize, 64)) == nil){
972 fprint(2, "cannot cache disk %s: %r\n", n->fsysimage);
977 if((disk = diskopenventi(vcache, n->fsysscore)) == nil){
978 fprint(2, "cannot open venti disk %V: %r\n", n->fsysscore);
982 if((fsys = fsysopen(disk)) == nil){
983 fprint(2, "cannot open fsys on %V: %r\n", n->fsysscore);
988 fsysroot(fsys, &n->mfsyshandle);
994 fid->fsys = n->mfsys;
995 fid->fsyshandle = n->mfsyshandle;
998 * Use fsys handle from tree or from handle.
999 * This assumes that fsyshandle was set by fidtohandle
1000 * earlier, so it's not okay to reuse handles (except the root)
1001 * across sessions. The encryption above makes and
1002 * enforces the same restriction, so this is okay.
1004 fid->fsys = n->fsys;
1005 fh = &fid->fsyshandle;
1007 fh->len = h->len-FsysHandleOffset;
1008 memmove(fh->h, h->h+FsysHandleOffset, fh->len);
1010 *fh = n->fsyshandle;
1011 trace("handletofid: fsyshandle %.*lH\n", fh->len, fh->h);
1015 * TO DO (maybe): some sort of path restriction here.
1017 trace("handletofid: cnode %s fsys %p fsyshandle %.*lH\n",
1018 n->name, fid->fsys, fid->fsyshandle.len, fid->fsyshandle.h);
1023 _fidtohandle(Fid *fid, Nfs3Handle *h)
1029 * Record fsys handle in n, don't bother sending it to client
1032 n->fsys = fid->fsys;
1033 if(!n->isblackhole){
1034 n->fsyshandle = fid->fsyshandle;
1035 fid->fsyshandle.len = 0;
1037 memmove(h->h, n->handle, CnodeHandleSize);
1038 memmove(h->h+FsysHandleOffset, fid->fsyshandle.h, fid->fsyshandle.len);
1039 h->len = FsysHandleOffset+fid->fsyshandle.len;
1043 fidtohandle(Fid *fid, Nfs3Handle *h)
1045 _fidtohandle(fid, h);
1054 memset(&fid, 0, sizeof fid);
1055 fid.cnode = config.ctree->root;
1056 _fidtohandle(&fid, &root);
1057 fprint(2, "handle %.*lH\n", root.len, root.h);
1061 fsgetroot(Nfs3Handle *h)
1068 fsgetattr(SunAuthUnix *au, Nfs3Handle *h, Nfs3Attr *attr)
1073 trace("getattr %.*lH\n", h->len, h->h);
1074 if((ok = handletofid(h, &fid, HAttr)) != Nfs3Ok)
1077 return fsysgetattr(fid.fsys, au, &fid.fsyshandle, attr);
1079 return cnodegetattr(fid.cnode, attr);
1083 * Lookup is always the hard part.
1086 fslookup(SunAuthUnix *au, Nfs3Handle *h, char *name, Nfs3Handle *nh)
1094 trace("lookup %.*lH %s\n", h->len, h->h, name);
1097 if(strcmp(name, "..") == 0 || strcmp(name, ".") == 0)
1099 if((ok = handletofid(h, &fid, mode)) != Nfs3Ok){
1101 trace("lookup: handletofid %r\n");
1105 if(strcmp(name, ".") == 0){
1106 fidtohandle(&fid, nh);
1111 * Walk down file system and cnode simultaneously.
1112 * If dotdot and file system doesn't move, need to walk
1113 * up cnode. Save the corresponding fsys handles in
1114 * the cnode as we walk down so that we'll have them
1115 * for dotdotting back up.
1120 * Walk down config tree and file system simultaneously.
1122 if((ok = cnodelookup(config.ctree, &n, name)) != Nfs3Ok){
1124 trace("lookup: cnodelookup: %r\n");
1129 if((ok = fsyslookup(fid.fsys, au, &fid.fsyshandle, name, &xh)) != Nfs3Ok){
1131 trace("lookup: fsyslookup: %r\n");
1134 fid.fsyshandle = xh;
1138 * Walking dotdot. Ick.
1140 trace("lookup dotdot fsys=%p\n", fid.fsys);
1143 * Walk up file system, then try up config tree.
1145 if((ok = fsyslookup(fid.fsys, au, &fid.fsyshandle, "..", &xh)) != Nfs3Ok){
1147 trace("lookup fsyslookup: %r\n");
1150 fid.fsyshandle = xh;
1153 * Usually just go to n->parent.
1155 * If we're in a subtree of the mounted file system that
1156 * isn't represented explicitly by the config tree (instead
1157 * the black hole node represents the entire file tree),
1158 * then we only go to n->parent when we've dotdotted back
1159 * to the right handle.
1161 if(n->parent == nil)
1162 trace("lookup dotdot: no parent\n");
1164 trace("lookup dotdot: parent %.*lH, have %.*lH\n",
1165 n->parent->fsyshandle.len, n->parent->fsyshandle.h,
1170 if(handlecmp(&n->parent->mfsyshandle, &xh) == 0)
1178 * No file system, just walk up.
1185 fid.fsyshandle = n->fsyshandle;
1188 fidtohandle(&fid, nh);
1193 fsaccess(SunAuthUnix *au, Nfs3Handle *h, u32int want, u32int *got, Nfs3Attr *attr)
1198 trace("access %.*lH 0x%ux\n", h->len, h->h, want);
1199 if((ok = handletofid(h, &fid, HAccess)) != Nfs3Ok)
1202 return fsysaccess(fid.fsys, au, &fid.fsyshandle, want, got, attr);
1203 *got = want & (Nfs3AccessRead|Nfs3AccessLookup|Nfs3AccessExecute);
1204 return cnodegetattr(fid.cnode, attr);
1208 fsreadlink(SunAuthUnix *au, Nfs3Handle *h, char **link)
1213 trace("readlink %.*lH\n", h->len, h->h);
1214 if((ok = handletofid(h, &fid, HRead)) != Nfs3Ok)
1217 return fsysreadlink(fid.fsys, au, &fid.fsyshandle, link);
1219 return Nfs3ErrNotSupp;
1223 fsreadfile(SunAuthUnix *au, Nfs3Handle *h, u32int count, u64int offset, uchar **data, u32int *pcount, u1int *peof)
1228 trace("readfile %.*lH\n", h->len, h->h);
1229 if((ok = handletofid(h, &fid, HRead)) != Nfs3Ok)
1232 return fid.cnode->read(fid.cnode, count, offset, data, pcount, peof);
1234 return fsysreadfile(fid.fsys, au, &fid.fsyshandle, count, offset, data, pcount, peof);
1235 return Nfs3ErrNotSupp;
1239 fsreaddir(SunAuthUnix *au, Nfs3Handle *h, u32int len, u64int cookie, uchar **pdata, u32int *pcount, u1int *peof)
1244 trace("readdir %.*lH\n", h->len, h->h);
1245 if((ok = handletofid(h, &fid, HRead)) != Nfs3Ok)
1248 return fsysreaddir(fid.fsys, au, &fid.fsyshandle, len, cookie, pdata, pcount, peof);
1249 return cnodereaddir(fid.cnode, len, cookie, pdata, pcount, peof);
1253 logread(Cnode *n, u32int count, u64int offset, uchar **data, u32int *pcount, u1int *peof)
1261 refreshdiskread(Cnode *n, u32int count, u64int offset, uchar **data, u32int *pcount, u1int *peof)
1270 if(refreshdisk() < 0)
1271 snprint(buf, sizeof buf, "refreshdisk: %r\n");
1273 strcpy(buf, "ok\n");
1274 *data = emalloc(strlen(buf));
1275 strcpy((char*)*data, buf);
1276 *pcount = strlen(buf);
1282 refreshconfigread(Cnode *n, u32int count, u64int offset, uchar **data, u32int *pcount, u1int *peof)
1291 if(readconfigfile(&config) < 0)
1292 snprint(buf, sizeof buf, "readconfig: %r\n");
1294 strcpy(buf, "ok\n");
1295 *data = emalloc(strlen(buf));
1296 strcpy((char*)*data, buf);
1297 *pcount = strlen(buf);