X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=bacula%2Fpatches%2Ftesting%2Ffaketape.c;h=9284680b6635f8e531595253ef423a4023fdba3d;hb=4c89411092df8f48c412994c0a68bfd8a823067a;hp=962faf86bbb6cb17b81955ab1efb5384858b7ed1;hpb=01813bea10c30a5b61ce8d0dc1466ef938e21a0f;p=bacula%2Fbacula diff --git a/bacula/patches/testing/faketape.c b/bacula/patches/testing/faketape.c index 962faf86bb..9284680b66 100644 --- a/bacula/patches/testing/faketape.c +++ b/bacula/patches/testing/faketape.c @@ -26,13 +26,43 @@ Switzerland, email:ftf@fsfeurope.org. */ +/* + +Device { + Name = Drive-1 # + Maximum File Size = 800M + Maximum Volume Size = 3G + Device Type = TAPE + Archive Device = /tmp/fake + Media Type = DLT-8000 + AutomaticMount = yes; # when device opened, read it + AlwaysOpen = yes; + RemovableMedia = yes; + RandomAccess = no; +} + + Block description : + + block { + int32 size; + void *data; + } + + EOF description : + + EOF { + int32 size=0; + } + + + */ + +#include "bacula.h" /* define 64bit file usage */ +#include "stored.h" #include "faketape.h" -#include -#include -#include static int dbglevel = 10; - +#define FILE_OFFSET 30 faketape *ftape_list[FTAPE_MAX_DRIVE]; static faketape *get_tape(int fd) @@ -60,17 +90,22 @@ static bool put_tape(faketape *ftape) return true; } +void faketape_debug(int level) +{ + dbglevel = level; +} + /****************************************************************/ /* theses function will replace open/read/write/close/ioctl * in bacula core */ -int faketape_open(const char *pathname, int flags, int mode) +int faketape_open(const char *pathname, int flags) { ASSERT(pathname != NULL); int fd; faketape *tape = new faketape(); - fd = tape->open(pathname, flags, mode); + fd = tape->open(pathname, flags); if (fd > 0) { put_tape(tape); } @@ -117,13 +152,9 @@ int faketape_ioctl(int fd, unsigned long int request, ...) result = t->tape_op(va_arg(argp, mtop *)); } else if (request == MTIOCGET) { result = t->tape_get(va_arg(argp, mtget *)); - } -// -// case MTIOCPOS: -// result = tape_pos(fd, va_arg(argp, mtpos *)); -// break; -// - else { + } else if (request == MTIOCPOS) { + result = t->tape_pos(va_arg(argp, mtpos *)); + } else { errno = ENOTTY; result = -1; } @@ -159,16 +190,7 @@ int faketape::tape_op(struct mtop *mt_com) break; case MTBSF: /* Backward space over mt_count filemarks. */ - current_file = current_file - mt_com->mt_count; - if (current_file < 0) { - current_file = 0; - errno = EIO; - result = -1; - } - atEOD = false; - atEOF = false; - atBOT = false; - open_file(); + result = bsf(mt_com->mt_count); break; case MTFSR: /* Forward space over mt_count records (tape blocks). */ @@ -179,7 +201,7 @@ int faketape::tape_op(struct mtop *mt_com) file number = 1 block number = 1 - mt: /dev/lto2: Erreur d'entrée/sortie + mt: /dev/lto2: Erreur d'entree/sortie file number = 2 block number = 0 @@ -189,19 +211,20 @@ int faketape::tape_op(struct mtop *mt_com) break; case MTBSR: /* Backward space over mt_count records (tape blocks). */ - result = -1; + result = bsr(mt_com->mt_count); break; case MTWEOF: /* Write mt_count filemarks. */ - weof(mt_com->mt_count); + result = weof(mt_com->mt_count); break; case MTREW: /* Rewind. */ - close_file(); + Dmsg0(dbglevel, "rewind faketape\n"); atEOF = atEOD = false; atBOT = true; current_file = 0; current_block = 0; + seek_file(); break; case MTOFFL: /* put tape offline */ @@ -229,22 +252,24 @@ int faketape::tape_op(struct mtop *mt_com) */ /* Can be at EOM */ atBOT = false; - atEOF = true; + atEOF = false; atEOD = true; - close_file(); - current_file = last_file+1; - current_block = -1; - /* Ne pas creer le fichier si on est a la fin */ + atEOT = false; + current_file = last_file; + current_block = -1; + seek_file(); break; case MTERASE: /* not used by bacula */ atEOD = true; atEOF = false; atEOT = false; + current_file = 0; current_block = -1; - delete_files(current_file); + seek_file(); + truncate_file(); break; case MTSETBLK: @@ -286,42 +311,14 @@ int faketape::tape_op(struct mtop *mt_com) case MTMKPART: break; } -// -// switch (result) { -// case NO_ERROR: -// case -1: /* Error has already been translated into errno */ -// break; -// -// default: -// case ERROR_FILEMARK_DETECTED: -// errno = EIO; -// break; -// -// case ERROR_END_OF_MEDIA: -// errno = EIO; -// break; -// -// case ERROR_NO_DATA_DETECTED: -// errno = EIO; -// break; -// -// case ERROR_NO_MEDIA_IN_DRIVE: -// errno = ENOMEDIUM; -// break; -// -// case ERROR_INVALID_HANDLE: -// case ERROR_ACCESS_DENIED: -// case ERROR_LOCK_VIOLATION: -// errno = EBADF; -// break; -// } -// + return result == 0 ? 0 : -1; } int faketape::tape_get(struct mtget *mt_get) { int density = 1; + int block_size = 1024; mt_get->mt_type = MT_ISSCSI2; mt_get->mt_blkno = current_block; @@ -333,7 +330,7 @@ int faketape::tape_get(struct mtget *mt_get) /* TODO */ mt_get->mt_dsreg = ((density << MT_ST_DENSITY_SHIFT) & MT_ST_DENSITY_MASK) | - ((tape_info.block_size << MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK); + ((block_size << MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK); mt_get->mt_gstat = 0x00010000; /* Immediate report mode.*/ @@ -369,7 +366,12 @@ int faketape::tape_get(struct mtget *mt_get) int faketape::tape_pos(struct mtpos *mt_pos) { - return 0; + if (current_block >= 0) { + mt_pos->mt_blkno = current_block; + return 0; + } + + return -1; } /* @@ -377,83 +379,39 @@ int faketape::tape_pos(struct mtpos *mt_pos) * of a tape. When you wrote something, data after the * current position are discarded. */ -int faketape::delete_files(int startfile) +int faketape::truncate_file() { - int cur,max=0; - char *p; - POOL_MEM tmp; - DIR *fp_dir; - struct dirent *dir; - struct stat statp; - - Dmsg1(dbglevel, "delete_files %i\n", startfile); - - fp_dir = opendir(this->volume); - if (!fp_dir) { - this->last_file=0; - this->size = 0; - return -1; - } - - this->size = 0; - - /* search for all digit files - * and we remove all ones that are greater than - * startfile - */ - while ((dir = readdir (fp_dir)) != NULL) - { - Mmsg(tmp, "%s/%s", this->volume, dir->d_name); - cur = 0; - /* check if d_name contains only digits */ - for(p = dir->d_name; *p && isdigit(*p); p++) - { - cur *= 10; - cur += *p - '0'; - } - if (!*p && cur > 0) { - if (cur >= startfile) { /* remove it */ - unlink(tmp.c_str()); - } else { - if (lstat(tmp.c_str(), &statp) == 0) { - this->size += statp.st_size; - } - max = (max > cur)?max:cur; - } - } - } - - closedir(fp_dir); - this->last_file = max; - return max; + Dmsg2(dbglevel, "truncate %i:%i\n", current_file, current_block); + ftruncate(fd, lseek(fd, 0, SEEK_CUR)); + last_file = current_file; + atEOD=true; + return 0; } faketape::faketape() { fd = -1; - cur_fd = -1; atEOF = false; atBOT = false; atEOT = false; atEOD = false; online = false; - - size = 0; + inplace = false; + needEOF = false; + + file_size = 0; last_file = 0; current_file = 0; current_block = -1; + current_pos = 0; + + max_block = 1024*1024*1024*1024*8; - volume = get_pool_memory(PM_NAME); - cur_file = get_pool_memory(PM_NAME); - cur_info = get_pool_memory(PM_NAME); } faketape::~faketape() { - free_pool_memory(volume); - free_pool_memory(cur_file); - free_pool_memory(cur_info); } int faketape::get_fd() @@ -461,38 +419,56 @@ int faketape::get_fd() return this->fd; } +/* + * TODO: check if after a write op, and other tape op put a EOF + */ int faketape::write(const void *buffer, unsigned int count) { + ASSERT(current_file >= 0); + ASSERT(count > 0); + ASSERT(buffer); + unsigned int nb; - Dmsg2(dbglevel, "write len=%i blocks=%i\n", count, current_block); - check_file(); + Dmsg3(dbglevel, "write len=%i %i:%i\n", count, current_file,current_block); if (atEOT) { Dmsg0(dbglevel, "write nothing, EOT !\n"); - return 0; + errno = ENOSPC; + return -1; } + if (!inplace) { + seek_file(); + } + + if (!atEOD) { /* if not at the end of the data */ + truncate_file(); + } + if (current_block != -1) { current_block++; } atBOT = false; - atEOD = true; + atEOF = false; + atEOD = true; /* End of data */ - /* TODO: remove all files > current_file and - * remove blocks > current_block - */ - if (count + size > tape_info.max_size) { - Dmsg2(dbglevel, - "EOT writing only %i of %i requested\n", - tape_info.max_size - size, count); - count = tape_info.max_size - size; - atEOT = true; - } + needEOF = true; /* next operation need EOF mark */ + +// if ((count + file_size) > max_size) { +// Dmsg2(dbglevel, +// "EOT writing only %i of %i requested\n", +// max_size - file_size, count); +// count = max_size - file_size; +// atEOT = true; +// } - ::write(cur_fd, &count, sizeof(count)); - nb = ::write(cur_fd, buffer, count); + uint32_t size = count; + ::write(fd, &size, sizeof(uint32_t)); + nb = ::write(fd, buffer, count); + file_size += sizeof(uint32_t) + nb; + if (nb != count) { atEOT = true; Dmsg2(dbglevel, @@ -505,113 +481,208 @@ int faketape::write(const void *buffer, unsigned int count) int faketape::weof(int count) { - Dmsg2(dbglevel, "Writing EOF %i:%i\n", current_file, current_block); + ASSERT(current_file >= 0); + Dmsg3(dbglevel, "Writing EOF %i:%i last=%i\n", + current_file, current_block,last_file); if (atEOT) { + errno = ENOSPC; current_block = -1; return -1; } + needEOF = false; + truncate_file(); /* nothing after this point */ - count--; /* end this file */ - ftruncate(cur_fd, lseek(cur_fd, 0, SEEK_CUR)); - current_file++; - open_file(); + /* TODO: check this */ + current_file += count; + current_block = 0; - /* we erase all previous information */ - if (last_file > current_file) { - delete_files(current_file); - } - atEOF = true; - atEOD = false; + uint32_t c=0; + seek_file(); + ::write(fd, &c, sizeof(uint32_t)); + seek_file(); - if (count > 0) { - current_block = -1; - return -1; - } else { - current_block = 0; - } + atEOD = false; + atBOT = false; + atEOF = true; return 0; } int faketape::fsf(int count) -{ - +{ + ASSERT(current_file >= 0); + ASSERT(fd >= 0); /* * 1 0 -> fsf -> 2 0 -> fsf -> 2 -1 */ + check_eof(); + + int ret; if (atEOT) { current_block = -1; return -1; } - close_file(); - - atEOF=1; + atBOT = atEOF = false; Dmsg3(dbglevel+1, "fsf %i+%i <= %i\n", current_file, count, last_file); if ((current_file + count) <= last_file) { current_file += count; current_block = 0; - return 0; + ret = 0; } else { Dmsg0(dbglevel, "Try to FSF after EOT\n"); current_file = last_file ; current_block = -1; atEOD=true; - return -1; + ret = -1; } + seek_file(); + return ret; } int faketape::fsr(int count) { - int i,nb; - off_t where=0, size; - Dmsg2(dbglevel, "fsr current_block=%i count=%i\n", current_block, count); + ASSERT(current_file >= 0); + ASSERT(fd >= 0); + + int i,nb, ret=0; + off_t where=0; + uint32_t s; + Dmsg3(dbglevel, "fsr %i:%i count=%i\n", current_file,current_block, count); + + check_eof(); if (atEOT) { + errno = EIO; current_block = -1; return -1; } - check_file(); + if (atEOD) { + errno = EIO; + return -1; + } + + atBOT = atEOF = false; /* check all block record */ - for(i=0; (i < count) && (where != -1) ; i++) { - nb = ::read(cur_fd, &size, sizeof(size)); /* get size of block */ - if (nb == sizeof(size)) { + for(i=0; (i < count) && !atEOF ; i++) { + nb = ::read(fd, &s, sizeof(uint32_t)); /* get size of next block */ + if (nb == sizeof(uint32_t) && s) { current_block++; - where = lseek(cur_fd, size, SEEK_CUR); /* seek after this block */ - if (where == -1) { - errno = EIO; - return -1; - } + where = lseek(fd, s, SEEK_CUR); /* seek after this block */ } else { + Dmsg4(dbglevel, "read EOF %i:%i nb=%i s=%i\n", + current_file, current_block, nb,s); errno = EIO; - return -1; + ret = -1; + if (current_file < last_file) { + current_block = 0; + current_file++; + seek_file(); + } + atEOF = true; /* stop the loop */ } } + + find_maxfile(); /* refresh stats */ + + if (where == file_size) { + atEOD = true; + } + return ret; +} + +int faketape::bsr(int count) +{ + Dmsg2(dbglevel, "bsr current_block=%i count=%i\n", + current_block, count); + + ASSERT(current_file >= 0); + ASSERT(count == 1); + ASSERT(fd >= 0); + + check_eof(); + + if (!count) { + return 0; + } + + int ret=0; + int last_f=0; + int last_b=0; + + off_t last=-1, last2=-1; + off_t orig = lseek(fd, 0, SEEK_CUR); + int orig_f = current_file; + int orig_b = current_block; + + current_block=0; + seek_file(); + + do { + if (!atEOF) { + last2 = last; + last = lseek(fd, 0, SEEK_CUR); + last_f = current_file; + last_b = current_block; + Dmsg5(dbglevel, "EOF=%i last=%lli orig=%lli %i:%i\n", + atEOF, last, orig, current_file, current_block); + } + ret = fsr(1); + } while ((lseek(fd, 0, SEEK_CUR) < orig) && (ret == 0)); + + if (last2 > 0 && atEOF) { /* we take the previous position */ + lseek(fd, last2, SEEK_SET); + current_file = last_f; + current_block = last_b - 1; + Dmsg3(dbglevel, "set offset2=%lli %i:%i\n", + last, current_file, current_block); + + } else if (last > 0) { + lseek(fd, last, SEEK_SET); + current_file = last_f; + current_block = last_b; + Dmsg3(dbglevel, "set offset=%lli %i:%i\n", + last, current_file, current_block); + } else { + lseek(fd, orig, SEEK_SET); + current_file = orig_f; + current_block = orig_b; + return -1; + } + + Dmsg2(dbglevel, "bsr %i:%i\n", current_file, current_block); + atEOT = atEOF = atEOD = false; + return 0; } int faketape::bsf(int count) { - close_file(); - atEOT = atEOD = false; + ASSERT(current_file >= 0); + Dmsg3(dbglevel, "bsf %i:%i count=%i\n", current_file, current_block, count); + int ret = 0; + + check_eof(); + atBOT = atEOF = atEOT = atEOD = false; if (current_file - count < 0) { current_file = 0; current_block = 0; atBOT = true; - return -1; - } - - current_file = current_file - count; - current_block = 0; - if (!current_file) { - atBOT = true; + errno = EIO; + ret = -1; + } else { + current_file = current_file - count + 1; + current_block = -1; + seek_file(); + current_file--; + /* go just before last EOF */ + lseek(fd, lseek(fd, 0, SEEK_CUR) - sizeof(uint32_t), SEEK_SET); } - - return 1; + return ret; } /* @@ -619,37 +690,24 @@ int faketape::bsf(int count) */ int faketape::offline() { - ASSERT(cur_fd > 0); - - close_file(); - - cur_fd = -1; - atEOF = false; - atEOT = false; - atEOD = false; - atBOT = false; + close(); + + atEOF = false; /* End of file */ + atEOT = false; /* End of tape */ + atEOD = false; /* End of data */ + atBOT = false; /* Begin of tape */ current_file = -1; current_block = -1; - last_file = 0; - return 0; -} - -int faketape::close_file() -{ - Dmsg0(dbglevel, "close_file\n"); - if (cur_fd > 0) { - ::close(cur_fd); - cur_fd = -1; - } + last_file = -1; return 0; } int faketape::close() { - close_file(); + check_eof(); ::close(fd); - + fd = -1; return 0; } /* @@ -666,24 +724,48 @@ int faketape::close() int faketape::read(void *buffer, unsigned int count) { - unsigned int nb, size; - check_file(); + ASSERT(current_file >= 0); + unsigned int nb; + uint32_t s; + + Dmsg2(dbglevel, "read %i:%i\n", current_file, current_block); if (atEOT || atEOD) { return 0; } - atBOT = false; + if (atEOF) { + current_file++; + current_block=0; + inplace = false; + atEOF = false; + } + + if (!inplace) { + seek_file(); + } + + atEOD = atBOT = false; current_block++; - nb = ::read(cur_fd, &size, sizeof(size)); - if (size > count) { - lseek(cur_fd, size, SEEK_CUR); + nb = ::read(fd, &s, sizeof(uint32_t)); + if (nb <= 0) { + atEOF = true; + return 0; + } + if (s > count) { /* not enough buffer to read block */ + Dmsg2(dbglevel, "Need more buffer to read next block %i > %i\n",s,count); + lseek(fd, s, SEEK_CUR); errno = ENOMEM; return -1; } - nb = ::read(cur_fd, buffer, size); - if (size != nb) { + if (!s) { /* EOF */ + atEOF = true; + lseek(fd, lseek(fd, 0, SEEK_CUR) - sizeof(uint32_t), SEEK_SET); + return 0; + } + nb = ::read(fd, buffer, s); + if (s != nb) { atEOF = true; if (current_file == last_file) { atEOD = true; @@ -694,135 +776,71 @@ int faketape::read(void *buffer, unsigned int count) return nb; } -int faketape::read_volinfo() +int faketape::open(const char *pathname, int uflags) { - struct stat statp; - memset(&tape_info, 0, sizeof(FTAPE_FORMAT)); - - Dmsg2(dbglevel, "read_volinfo %p %p\n", cur_info, volume); - Mmsg(cur_info, "%s/info", volume); - fd = ::open(cur_info, O_CREAT | O_RDWR | O_BINARY, 0640); - - if (fd < 0) { - return -1; - } - - fstat(fd, &statp); - - /* read volume info */ - int nb = ::read(fd, &tape_info, sizeof(FTAPE_FORMAT)); - if (nb != sizeof(FTAPE_FORMAT)) { /* new tape ? */ - Dmsg1(dbglevel, "Initialize %s\n", volume); - tape_info.version = 1; - tape_info.block_max = 2000000; - tape_info.block_size = statp.st_blksize; - tape_info.max_size = 10000000; - - lseek(fd, SEEK_SET, 0); - nb = ::write(fd, &tape_info, sizeof(FTAPE_FORMAT)); - - if (nb != sizeof(FTAPE_FORMAT)) { - ::close(fd); - return -1; - } - } - - Dmsg0(dbglevel, "read_volinfo OK\n"); - find_maxfile(); - - return fd; -} - -int faketape::open(const char *pathname, int uflags, int umode) -{ - Dmsg3(dbglevel, "faketape::open(%s, %i, %i)\n", pathname, uflags, umode); - pm_strcpy(volume, pathname); + Dmsg2(dbglevel, "faketape::open(%s, %i)\n", pathname, uflags); struct stat statp; - if (stat(volume, &statp) != 0) { - Dmsg1(dbglevel, "Can't stat on %s\n", volume); + if (stat(pathname, &statp) != 0) { + Dmsg1(dbglevel, "Can't stat on %s\n", pathname); return -1; } - if (!S_ISDIR(statp.st_mode)) { - Dmsg1(dbglevel, "%s is not a directory\n", volume); - errno = EACCES; + fd = ::open(pathname, O_CREAT | O_RDWR | O_LARGEFILE, 0700); + if (fd < 0) { return -1; } /* open volume descriptor and get this->fd */ - if (read_volinfo() < 0) { + if (find_maxfile() < 0) { return -1; } - current_block=-1; + current_block = 0; + current_file = 0; + needEOF = false; + online = inplace = true; + atBOT = true; + atEOT = atEOD = false; return fd; } /* - * read volume directory to get the last file number + * read volume to get the last file number */ int faketape::find_maxfile() { - int max=0; - int cur; - char *p; - POOL_MEM tmp; - DIR *fp_dir; - struct dirent *dir; struct stat statp; - - fp_dir = opendir(this->volume); - if (!fp_dir) { - last_file=0; - return -1; - } - - this->size = 0; - - /* search for all digit file */ - while ((dir = readdir (fp_dir)) != NULL) - { - Mmsg(tmp, "%s/%s", this->volume, dir->d_name); - if (lstat(tmp.c_str(), &statp) == 0) { - this->size += statp.st_size; - } else { - Dmsg1(dbglevel, "Can't stat %s\n", tmp.c_str()); - } - cur = 0; - /* TODO: compute size */ - for(p = dir->d_name; *p && isdigit(*p); p++) - { - cur *= 10; - cur += *p; - } - if (!*p && cur) { - max = (max > cur)?max:cur; - } + if (fstat(fd, &statp) != 0) { + return 0; } + last_file = statp.st_size>>FILE_OFFSET; + file_size = statp.st_size; + + current_pos = lseek(fd, 0, SEEK_CUR); /* get current position */ + Dmsg3(dbglevel+1, "last_file=%i file_size=%u current_pos=%i\n", + last_file, file_size, current_pos); - closedir(fp_dir); - this->last_file = max; - return max; + return last_file; } -int faketape::open_file() +int faketape::seek_file() { ASSERT(current_file >= 0); - close_file(); + Dmsg2(dbglevel, "seek_file %i:%i\n", current_file, current_block); - Mmsg(cur_file, "%s/%i", volume, current_file); - cur_fd = ::open(cur_file, O_CREAT | O_RDWR | O_BINARY, 0640); - if (cur_fd < 0) { + off_t pos = ((off_t)current_file)< current_file)?last_file:current_file; + if (current_block > 0) { + fsr(current_block); + } + inplace = true; - Dmsg1(dbglevel, "open_file %s\n", cur_file); - - return cur_fd; + return 0; } void faketape::dump() @@ -830,116 +848,7 @@ void faketape::dump() Dmsg0(dbglevel+1, "===================\n"); Dmsg2(dbglevel, "file:block = %i:%i\n", current_file, current_block); Dmsg1(dbglevel+1, "last_file=%i\n", last_file); - Dmsg1(dbglevel+1, "volume=%s\n", volume); - Dmsg1(dbglevel+1, "cur_file=%s\n", cur_file); - Dmsg1(dbglevel+1, "size=%i\n", size); - Dmsg1(dbglevel+1, "EOF=%i\n", atEOF); - Dmsg1(dbglevel+1, "EOT=%i\n", atEOT); - Dmsg1(dbglevel+1, "EOD=%i\n", atEOD); + Dmsg1(dbglevel+1, "file_size=%i\n", file_size); + Dmsg4(dbglevel+1, "EOF=%i EOT=%i EOD=%i BOT=%i\n", + atEOF, atEOT, atEOD, atBOT); } - -/**************************************************************** - -#define GMT_EOF(x) ((x) & 0x80000000) -#define GMT_BOT(x) ((x) & 0x40000000) -#define GMT_EOT(x) ((x) & 0x20000000) -#define GMT_SM(x) ((x) & 0x10000000) -#define GMT_EOD(x) ((x) & 0x08000000) - - - GMT_EOF(x) : La bande est positionnée juste après une filemark (toujours faux - après une opération MTSEEK). - - GMT_BOT(x) : La bande est positionnée juste au début du premier fichier - (toujours faux après une opération MTSEEK). - - GMT_EOT(x) : Une opération a atteint la fin physique de la bande (End Of - Tape). - - GMT_SM(x) : La bande est positionnée sur une setmark (toujours faux après une - opération MTSEEK). - - GMT_EOD(x) : La bande est positionnée à la fin des données enregistrées. - - -blkno = -1 (after MTBSF MTBSS or MTSEEK) -fileno = -1 (after MTBSS or MTSEEK) - -*** mtx load -drive type = Generic SCSI-2 tape -drive status = 0 -sense key error = 0 -residue count = 0 -file number = 0 -block number = 0 -Tape block size 0 bytes. Density code 0x0 (default). -Soft error count since last status=0 -General status bits on (41010000): - BOT ONLINE IM_REP_EN - -*** read empty block -dd if=/dev/lto2 of=/tmp/toto count=1 -dd: lecture de `/dev/lto2': Ne peut allouer de la mémoire -0+0 enregistrements lus -0+0 enregistrements écrits -1 octet (1B) copié, 4,82219 seconde, 0,0 kB/s - -file number = 0 -block number = 1 - -*** read file mark -dd if=/dev/lto2 of=/tmp/toto count=1 -0+0 enregistrements lus -0+0 enregistrements écrits -1 octet (1B) copié, 0,167274 seconde, 0,0 kB/s - -file number = 1 -block number = 0 - - *** write 2 blocks after rewind -dd if=/dev/zero of=/dev/lto2 count=2 -2+0 enregistrements lus -2+0 enregistrements écrits -1024 octets (1,0 kB) copiés, 6,57402 seconde, 0,2 kB/s - -file number = 1 -block number = 0 - -*** write 2 blocks -file number = 2 -block number = 0 - -*** rewind and fsr -file number = 0 -block number = 1 - -*** rewind and 2x fsr (we have just 2 blocks) -file number = 0 -block number = 2 - -*** fsr -mt: /dev/lto2: Erreur -file number = 1 -block number = 0 - - - ****************************************************************/ - - -#ifdef TEST - -int main() -{ - int fd; - char buf[500]; - printf("Starting FakeTape\n"); - - mkdir("/tmp/fake", 0700); - - - - - return 0; -} - -#endif