X-Git-Url: http://git.linux-vserver.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=util-vserver%2Fsrc%2Fvhashify-init.hc;h=49aa7b12934b8f2d7d6ce6ec6ae159ee7d1e1d5e;hb=faa778968d1a7dfeaebc9fe4b847e691dc62fd15;hp=57611b37e5be4e7fd0cd34fbfdfd9c0cc790b15f;hpb=a2a43f198d74492b597315f83ba77b14b769eb45;p=util-vserver.git diff --git a/util-vserver/src/vhashify-init.hc b/util-vserver/src/vhashify-init.hc index 57611b3..49aa7b1 100644 --- a/util-vserver/src/vhashify-init.hc +++ b/util-vserver/src/vhashify-init.hc @@ -91,6 +91,180 @@ initHashList(HashDirCollection *hash_vec, char const *hashdir) return res; } +static bool +initHashMethod(struct HashDirConfiguration *conf, char const *filename) +{ + int fd = open(filename, O_RDONLY); + if (fd==-1 && conf->method==0) + conf->method = hashFunctionDefault(); + + if (fd==-1) { + assert(conf->method!=0); + if (conf->method==0) return false; + if (global_args->dry_run) return true; // do not create the file + + fd = Eopen(filename, O_WRONLY|O_CREAT|O_EXCL|O_NOFOLLOW, 0644); + TEMP_FAILURE_RETRY(write(fd, conf->method->name, strlen(conf->method->name))); + TEMP_FAILURE_RETRY(write(fd, "\n", 1)); + } + else { + off_t s = Elseek(fd, 0, SEEK_END); + char buf[s + 1]; + Elseek(fd, 0, SEEK_SET); + + conf->method=0; + + if (s>0 && read(fd, buf, s+1)==s) { + while (s>0 && (buf[s-1]=='\0' || buf[s-1]=='\n')) + --s; + buf[s] = '\0'; + + conf->method = hashFunctionFind(buf); + if (conf->method==0) { + WRITE_MSG(2, "Can not find hash-function '"); + WRITE_STR(2, buf); + WRITE_MSG(2, "'\n"); + } + } + else + WRITE_MSG(2, "Can not read configuration file for hash-method\n"); + } + + if (conf->method!=0 && conf->method->digestsize*8>HASH_MAXBITS) { + WRITE_MSG(2, "Wow... what an huge hash-function. I can not handle so much bits; giving up...\n"); + conf->method=0; + } + + Eclose(fd); + return conf->method!=0; +} + +static bool +initHashBlocks(struct HashDirConfiguration *conf, char const *filename) +{ + int fd = open(filename, O_RDONLY); + + if (fd==-1) { + char str[sizeof("all,start,middle,end,")] = { [0] = '\0' }; + + if (global_args->dry_run) return true; // do not create the file + + fd = Eopen(filename, O_WRONLY|O_CREAT|O_EXCL|O_NOFOLLOW, 0644); + + if (conf->blocks== hshALL) strcat(str, "all\n"); + if (conf->blocks & hshSTART) strcat(str, "start\n"); + if (conf->blocks & hshMIDDLE) strcat(str, "middle\n"); + if (conf->blocks & hshEND) strcat(str, "end\n"); + + EwriteAll(fd, str, strlen(str)); + } + else { + off_t s = Elseek(fd, 0, SEEK_END); + char buf[s + 1]; + Elseek(fd, 0, SEEK_SET); + + conf->blocks = hshINVALID; + + if (s>0 && read(fd, buf, s+1)==s) { + char *tok = buf; + char *sep = "\n,\t "; + + buf[s] = '\0'; + conf->blocks = hshALL; + + do { + char *ptr = strsep(&tok, sep); + + if (*ptr=='#') { sep = "\n"; continue; } + sep = "\n,\t "; + if (*ptr=='\0') continue; + + if (strcasecmp(ptr, "all") ==0) conf->blocks = hshALL; + else { + if (conf->blocks==hshINVALID) conf->blocks = 0; + + else if (strcasecmp(ptr, "start") ==0) conf->blocks |= hshSTART; + else if (strcasecmp(ptr, "middle")==0) conf->blocks |= hshMIDDLE; + else if (strcasecmp(ptr, "end") ==0) conf->blocks |= hshEND; + else { + WRITE_MSG(2, "Invalid block descriptor '"); + WRITE_STR(2, ptr); + WRITE_MSG(2, "'\n"); + conf->blocks = hshINVALID; + tok = 0; + } + } + } while (tok!=0); + } + else + WRITE_MSG(2, "Can not read configuration file for hash-blocks\n"); + } + + Eclose(fd); + return conf->blocks!=hshINVALID; +} + +static bool +initHashBlockSize(struct HashDirConfiguration *conf, char const *filename) +{ + if (conf->blocks==hshALL) return true; + + int fd = open(filename, O_RDONLY); + if (fd==-1) { + char str[sizeof("0x") + sizeof(size_t)*3+2] = { + [0] = '0', [1] = 'x' + }; + size_t len = utilvserver_fmt_xuint(str+2, conf->blocksize); + + if (global_args->dry_run) return true; // do not create the file + + fd = Eopen(filename, O_WRONLY|O_CREAT|O_EXCL|O_NOFOLLOW, 0644); + EwriteAll(fd, str, len+2); + } + else { + off_t s = Elseek(fd, 0, SEEK_END); + char buf[s + 1]; + Elseek(fd, 0, SEEK_SET); + + conf->blocksize = (size_t)(-1); + + if (s>0 && read(fd, buf, s+1)==s) { + char *errptr; + + while (s>0 && (buf[s-1]=='\0' || buf[s-1]=='\n')) + --s; + buf[s] = '\0'; + + conf->blocksize = strtol(buf, &errptr, 0); + if (errptr==buf || (*errptr!='\0' && *errptr!='\n')) { + WRITE_MSG(2, "Failed to parse blocksize '"); + WRITE_STR(2, buf); + WRITE_MSG(2, "'\n"); + conf->blocksize = (size_t)(-1); + } + } + else + WRITE_MSG(2, "Can not read configuration file for hash-blocksize\n"); + } + + Eclose(fd); + return conf->blocksize!=(size_t)(-1); +} + +static bool +initHashConf(struct HashDirConfiguration *conf, char const *hashdir) +{ + size_t l = strlen(hashdir); + char tmp[l + MAX(MAX(sizeof("/method"), sizeof("/blocks")), + sizeof("/blocksize"))]; + + memcpy(tmp, hashdir, l); + + return ((strcpy(tmp+l, "/method"), initHashMethod (conf, tmp)) && + (strcpy(tmp+l, "/blocks"), initHashBlocks (conf, tmp)) && + (strcpy(tmp+l, "/blocksize"), initHashBlockSize(conf, tmp))); +} + static char * searchHashdir(char const *lhs, char const *rhs) { @@ -120,6 +294,11 @@ initModeManually(struct Arguments const UNUSED *args, int argc, char *argv[]) exit(1); } + if (!initHashConf(&global_info.hash_conf, args->hash_dir)) { + WRITE_MSG(2, "failed to initialize hash-configuration\n"); + exit(1); + } + global_info.hash_dirs_max_size = initHashList(&global_info.hash_dirs, args->hash_dir); MatchList_initManually(&global_info.dst_list, 0, strdup(argv[0]), argv[1]); @@ -157,6 +336,11 @@ initModeVserver(struct Arguments const UNUSED *args, int argc, char *argv[]) exit(1); } + if (!initHashConf(&global_info.hash_conf, hashdir)) { + WRITE_MSG(2, "failed to initialize hash-configuration\n"); + exit(1); + } + global_info.hash_dirs_max_size = initHashList(&global_info.hash_dirs, hashdir); free(const_cast(char *)(hashdir));