#ifndef lint
static const char rcsid[] =
- "$Id: tape.c,v 1.28 2000/12/21 15:01:54 stelian Exp $";
+ "$Id: tape.c,v 1.56 2001/09/12 09:02:51 stelian Exp $";
#endif /* not lint */
#include <config.h>
+#include <compatlfs.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <setjmp.h>
+#include <signal.h>
+#include <stdio.h>
+#include <compaterr.h>
+#include <system.h>
+#ifdef __STDC__
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#else
+int write(), read();
+#endif
+
#ifdef __linux__
#include <sys/types.h>
-#include <linux/types.h>
+#include <sys/time.h>
+#include <time.h>
#endif
#include <sys/param.h>
#include <sys/socket.h>
-#include <sys/time.h>
#include <sys/wait.h>
+#include <sys/mtio.h>
#ifdef __linux__
+#include <linux/fs.h>
+#undef atomic_read /* this get wrongly defined in kernel */
+ /* headers and we don't want it */
+#ifdef HAVE_EXT2FS_EXT2_FS_H
+#include <ext2fs/ext2_fs.h>
+#else
#include <linux/ext2_fs.h>
+#endif
+#include <ext2fs/ext2fs.h>
#include <bsdcompat.h>
-#else /* __linux__ */
-#ifdef sunos
+#elif defined sunos
#include <sys/vnode.h>
#include <ufs/fs.h>
#else
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
-#endif
#endif /* __linux__ */
#include <protocols/dumprestore.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <setjmp.h>
-#include <signal.h>
-#include <stdio.h>
-#include <compaterr.h>
-#ifdef __STDC__
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#else
-int write(), read();
-#endif
+#ifdef HAVE_ZLIB
+#include <zlib.h>
+#endif /* HAVE_ZLIB */
-#ifdef __linux__
-#include <ext2fs/ext2fs.h>
-#endif
+#ifdef HAVE_BZLIB
+#include <bzlib.h>
+#endif /* HAVE_BZLIB */
#include "dump.h"
char *nexttape;
extern pid_t rshpid;
int eot_code = 1;
+long long tapea_bytes = 0; /* bytes_written at start of current volume */
static ssize_t atomic_read __P((int, void *, size_t));
static ssize_t atomic_write __P((int, const void *, size_t));
-static void doslave __P((int, int));
+static void doslave __P((int, int, int));
static void enslave __P((void));
static void flushtape __P((void));
static void killall __P((void));
static void rollforward __P((void));
-static int system_command __P((const char *, const char *, int));
/*
* Concurrent dump mods (Caltech) - disk block reading and tape writing
};
int reqsiz;
+struct slave_results {
+ ssize_t unclen; /* uncompressed length */
+ ssize_t clen; /* compressed length */
+};
+
#define SLAVES 3 /* 1 slave writing, 1 reading, 1 for slack */
struct slave {
int tapea; /* header number at start of this chunk */
static int tapea_volume; /* value of spcl.c_tapea at volume start */
int master; /* pid of master, for sending error signals */
-int tenths; /* length of tape used per block written */
+int tenths; /* length of tape overhead per block written */
static int caught; /* have we caught the signal to proceed? */
static int ready; /* have we reached the lock point without having */
/* received the SIGUSR2 signal from the prev slave? */
static sigjmp_buf jmpbuf; /* where to jump to if we are ready when the */
/* SIGUSR2 arrives from the previous slave */
+#ifdef USE_QFA
+static int gtperr = 0;
+#endif
int
alloctape(void)
* variable, 0.30" to 0.45". The gap is maximal when the tape stops.
*/
if (blocksperfile == 0 && !unlimited)
- tenths = writesize / density +
- (cartridge ? 16 : density == 625 ? 5 : 8);
+ tenths = (cartridge ? 16 : density == 625 ? 5 : 8);
+ else {
+ tenths = 0;
+ density = 1;
+ }
/*
* Allocate tape buffer contiguous with the array of instruction
* packets, so flushtape() can write them together with one write().
quit("Cannot recover\n");
/* NOTREACHED */
}
- msg("write error %d blocks into volume %d: %s\n", blocksthisvol, tapeno, strerror(errnum));
+ msg("write error %d blocks into volume %d: %s\n",
+ blocksthisvol, tapeno, strerror(errnum));
broadcast("DUMP WRITE ERROR!\n");
if (query("Do you want to rewrite this volume?")) {
msg("Closing this volume. Prepare to restart with new media;\n");
time_t tnow, ttaken;
int blocks;
-#ifdef __linux__
- (void)time4(&tnow);
-#else
- (void)time(&tnow);
-#endif
+ tnow = time(NULL);
ttaken = tnow - tstart_volume;
blocks = spcl.c_tapea - tapea_volume;
- msg("Volume %d completed at: %s", tapeno,
-#ifdef __linux__
- ctime4(&tnow));
-#else
- ctime(&tnow));
-#endif
+ msg("Volume %d completed at: %s", tapeno, ctime(&tnow));
+ if (! compressed)
+ msg("Volume %d %ld tape blocks (%.2fMB)\n", tapeno,
+ blocks, ((double)blocks * TP_BSIZE / 1048576));
if (ttaken > 0) {
+ long volkb = (bytes_written - tapea_bytes) / 1024;
+ long txfrate = volkb / ttaken;
msg("Volume %d took %d:%02d:%02d\n", tapeno,
ttaken / 3600, (ttaken % 3600) / 60, ttaken % 60);
- msg("Volume %d transfer rate: %ld KB/s\n", tapeno,
- blocks / ttaken);
- xferrate += blocks / ttaken;
+ msg("Volume %d transfer rate: %ld kB/s\n", tapeno,
+ txfrate);
+ xferrate += txfrate;
+ if (compressed) {
+ double rate = .0005 + (double) blocks / (double) volkb;
+ msg("Volume %d %ldkB uncompressed, %ldkB compressed,"
+ " %1.3f:1\n",
+ tapeno, blocks, volkb, rate);
+ }
}
return(tnow);
}
tapesize = blockswritten;
deltat = tstart_writing - tnow + (1.0 * (tnow - tstart_writing))
/ blockswritten * tapesize;
- (void)snprintf(msgbuf, sizeof(msgbuf),
- "%3.2f%% done at %ld KB/s, finished in %d:%02d\n",
- (blockswritten * 100.0) / tapesize,
- (spcl.c_tapea - tapea_volume) / (tnow - tstart_volume),
- (int)(deltat / 3600), (int)((deltat % 3600) / 60));
+ if (tnow > tstart_volume)
+ (void)snprintf(msgbuf, sizeof(msgbuf),
+ "%3.2f%% done at %ld kB/s, finished in %d:%02d\n",
+ (blockswritten * 100.0) / tapesize,
+ (spcl.c_tapea - tapea_volume) / (tnow - tstart_volume),
+ (int)(deltat / 3600), (int)((deltat % 3600) / 60));
+ else
+ (void)snprintf(msgbuf, sizeof(msgbuf),
+ "%3.2f%% done, finished in %d:%02d\n",
+ (blockswritten * 100.0) / tapesize,
+ (int)(deltat / 3600), (int)((deltat % 3600) / 60));
return msgbuf;
}
void
statussig(int notused)
{
- time_t tnow;
int save_errno = errno;
char *buf;
-#ifdef __linux__
- (void) time4(&tnow);
-#else
- (void) time((time_t *) &tnow);
-#endif
- buf = mktimeest(tnow);
+ buf = mktimeest(time(NULL));
if (buf)
write(STDERR_FILENO, buf, strlen(buf));
errno = save_errno;
{
int i, blks, got;
long lastfirstrec;
+ struct slave_results returned;
int siz = (char *)nextblock - (char *)slp->req;
/* Read results back from next slave */
if (slp->sent) {
- if (atomic_read( slp->fd, (char *)&got, sizeof got)
- != sizeof got) {
+ if (atomic_read( slp->fd, (char *)&returned, sizeof returned)
+ != sizeof returned) {
perror(" DUMP: error reading command pipe in master");
dumpabort(0);
}
+ got = returned.unclen;
+ bytes_written += returned.clen;
+ if (returned.unclen == returned.clen)
+ uncomprblks++;
slp->sent = 0;
- /* Check for errors */
- if (got < 0)
- tperror(-got);
-
- /* Check for end of tape */
- if (got < writesize) {
- msg("End of tape detected\n");
+ /* Check for errors or end of tape */
+ if (got <= 0) {
+ /* Check for errors */
+ if (got < 0)
+ tperror(-got);
+ else
+ msg("End of tape detected\n");
/*
* Drain the results, don't care what the values were.
for (i = 0; i < SLAVES; i++) {
if (slaves[i].sent) {
if (atomic_read( slaves[i].fd,
- (char *)&got, sizeof got)
- != sizeof got) {
+ (char *)&returned, sizeof returned)
+ != sizeof returned) {
perror(" DUMP: error reading command pipe in master");
dumpabort(0);
}
slp->inode = curino;
nextblock = slp->tblock;
trecno = 0;
- asize += tenths;
+ asize += tenths + returned.clen / density;
blockswritten += ntrec;
blocksthisvol += ntrec;
- if (!pipeout && !unlimited && (blocksperfile ?
- (blocksthisvol >= blocksperfile) : (asize > tsize))) {
- close_rewind();
- startnewtape(0);
- }
- timeest();
-}
-
-/*
- * Executes the command in a shell.
- * Returns -1 if an error occured, the exit status of
- * the command on success.
- */
-int system_command(const char *command, const char *device, int volnum) {
- int pid, status;
- char commandstr[4096];
-
- pid = fork();
- if (pid == -1) {
- perror(" DUMP: unable to fork");
- return -1;
- }
- if (pid == 0) {
- setuid(getuid());
- setgid(getgid());
-#if OLD_STYLE_FSCRIPT
- snprintf(commandstr, sizeof(commandstr), "%s", command);
-#else
- snprintf(commandstr, sizeof(commandstr), "%s %s %d", command, device, volnum);
-#endif
- commandstr[sizeof(commandstr) - 1] = '\0';
- execl("/bin/sh", "sh", "-c", commandstr, NULL);
- perror(" DUMP: unable to execute shell");
- exit(-1);
- }
- do {
- if (waitpid(pid, &status, 0) == -1) {
- if (errno != EINTR) {
- perror(" DUMP: waitpid error");
- return -1;
+ if (!pipeout && !unlimited) {
+ if (blocksperfile) {
+ if ( compressed ? (bytes_written - tapea_bytes + SLAVES * (writesize + sizeof(struct tapebuf))) >= blocksperfile * 1024
+ : blocksthisvol >= blocksperfile ) {
+ close_rewind();
+ startnewtape(0);
}
- } else {
- if (WIFEXITED(status))
- return WEXITSTATUS(status);
- else
- return -1;
}
- } while(1);
+ else if (asize > tsize) {
+ close_rewind();
+ startnewtape(0);
+ }
+ }
+ timeest();
}
time_t
{
int f;
int got;
+ struct slave_results returned;
for (f = 0; f < SLAVES; f++) {
/*
* fixme: punt for now.
*/
if (slaves[f].sent) {
- if (atomic_read( slaves[f].fd, (char *)&got, sizeof got)
- != sizeof got) {
+ if (atomic_read( slaves[f].fd, (char *)&returned, sizeof returned)
+ != sizeof returned) {
perror(" DUMP: error reading command pipe in master");
dumpabort(0);
}
+ got = returned.unclen;
+ bytes_written += returned.clen;
+ if (returned.unclen == returned.clen)
+ uncomprblks++;
slaves[f].sent = 0;
if (got < 0)
tperror(-got);
- if (got != writesize) {
+ if (got == 0) {
msg("EOT detected in last 2 tape records!\n");
msg("Use a longer tape, decrease the size estimate\n");
quit("or use no size estimate at all.\n");
#endif
{
(void) close(tapefd);
- while ((f = open(tape, 0)) < 0)
- sleep (10);
- (void) close(f);
+ if (!fifoout) {
+ while ((f = OPEN(tape, 0)) < 0)
+ sleep (10);
+ (void) close(f);
+ }
}
eot_code = 1;
if (eot_script && spcl.c_type != TS_END) {
void
rollforward(void)
{
- register struct req *p, *q, *prev;
+ register struct req *p, *q = NULL, *prev;
register struct slave *tslp;
int i, size, savedtapea, got;
union u_spcl *ntb, *otb;
+ struct slave_results returned;
#ifdef __linux__
int blks;
long lastfirstrec;
* worked ok, otherwise the tape is much too short!
*/
if (slp->sent) {
- if (atomic_read( slp->fd, (char *)&got, sizeof got)
- != sizeof got) {
+ if (atomic_read( slp->fd, (char *)&returned, sizeof returned)
+ != sizeof returned) {
perror(" DUMP: error reading command pipe in master");
dumpabort(0);
}
+ got = returned.unclen;
+ bytes_written += returned.clen;
+ if (returned.clen == returned.unclen)
+ uncomprblks++;
slp->sent = 0;
if (got < 0)
tperror(-got);
- if (got != writesize) {
+ if (got == 0) {
quit("EOT detected at start of the tape!\n");
}
}
slp->firstrec = lastfirstrec + ntrec;
slp->count = lastspclrec + blks + 1 - spcl.c_tapea;
slp->inode = curino;
- asize += tenths;
+ asize += tenths + returned.clen / density;
blockswritten += ntrec;
blocksthisvol += ntrec;
#endif
parentpid = getpid();
tapea_volume = spcl.c_tapea;
-#ifdef __linux__
- (void)time4(&tstart_volume);
-#else
- (void)time((&tstart_volume);
-#endif
+ tapea_bytes = bytes_written;
+ tstart_volume = time(NULL);
restore_check_point:
#ifdef __linux__
#ifdef RDUMP
while ((tapefd = (host ? rmtopen(tape, 2) : pipeout ?
fileno(stdout) :
- open(tape, O_WRONLY|O_CREAT, 0666))) < 0)
+ OPEN(tape, O_WRONLY|O_CREAT, 0666))) < 0)
#else
while ((tapefd = (pipeout ? fileno(stdout) :
- open(tape, O_WRONLY|O_CREAT, 0666))) < 0)
+ OPEN(tape, O_RDWR|O_CREAT, 0666))) < 0)
#endif
{
msg("Cannot open output \"%s\".\n", tape);
spcl.c_volume++;
spcl.c_type = TS_TAPE;
spcl.c_flags |= DR_NEWHEADER;
- writeheader((ino_t)slp->inode);
+ spcl.c_ntrec = ntrec;
+ if (compressed)
+ spcl.c_flags |= DR_COMPRESSED;
+ writeheader((dump_ino_t)slp->inode);
spcl.c_flags &=~ DR_NEWHEADER;
- msg("Volume %d started at: %s", tapeno,
-#ifdef __linux__
- ctime4(&tstart_volume));
-#else
- ctime(&tstart_volume));
-#endif
+ msg("Volume %d started with block %ld at: %s", tapeno,
+ spcl.c_tapea, ctime(&tstart_volume));
if (tapeno > 1)
msg("Volume %d begins with blocks from inode %d\n",
tapeno, slp->inode);
!= sizeof i)
quit("master/slave protocol botched 3\n");
#endif
- doslave(cmd[0], i);
+ doslave(cmd[0], i, (slaves[i].pid == slp->pid));
Exit(X_FINOK);
}
+ else
+ close(cmd[0]);
}
#ifdef LINUX_FORK_BUG
}
/*
- * Synchronization - each process has a lockfile, and shares file
- * descriptors to the following process's lockfile. When our write
- * completes, we release our lock on the following process's lock-
- * file, allowing the following process to lock it and proceed. We
- * get the lock back for the next cycle by swapping descriptors.
+ * Synchronization - each process waits for a SIGUSR2 from the
+ * previous process before writing to the tape, and sends SIGUSR2
+ * to the next process when the tape write completes. On tape errors
+ * a SIGUSR1 is sent to the master which then terminates all of the
+ * slaves.
*/
static void
-doslave(int cmd, int slave_number)
+doslave(int cmd, int slave_number, int first)
{
register int nread;
- int nextslave, size, eot_count;
+ int nextslave, size, eot_count, bufsize;
volatile int wrote = 0;
+ char *buffer;
+#if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
+ struct tapebuf *comp_buf = NULL;
+ int compresult, do_compress = !first;
+ unsigned long worklen;
+#ifdef HAVE_BZLIB
+ unsigned int worklen2;
+#endif
+#endif /* HAVE_ZLIB || HAVE_BZLIB */
+ struct slave_results returns;
#ifdef __linux__
errcode_t retval;
#endif
+#ifdef USE_QFA
+ long curtapepos;
+ union u_spcl *uspclptr;
+ struct s_spcl *spclptr;
+#endif /* USE_QFA */
/*
* Need our own seek pointer.
*/
(void) close(diskfd);
- if ((diskfd = open(disk, O_RDONLY)) < 0)
+ if ((diskfd = OPEN(disk, O_RDONLY)) < 0)
quit("slave couldn't reopen disk: %s\n", strerror(errno));
#ifdef __linux__
+#ifdef BLKFLSBUF
+ (void)ioctl(diskfd, BLKFLSBUF);
+#endif
ext2fs_close(fs);
retval = dump_fs_open(disk, &fs);
if (retval)
quit("master/slave protocol botched - didn't get pid of next slave.\n");
}
+#if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
+ /* if we're doing a compressed dump, allocate the compress buffer */
+ if (compressed) {
+ comp_buf = malloc(sizeof(struct tapebuf) + TP_BSIZE + writesize);
+ if (comp_buf == NULL)
+ quit("couldn't allocate a compress buffer.\n");
+ if (bzipflag)
+ comp_buf->flags = COMPRESS_BZLIB;
+ else
+ comp_buf->flags = COMPRESS_ZLIB;
+ }
+#endif /* HAVE_ZLIB || HAVE_BZLIB */
+
/*
* Get list of blocks to dump, read the blocks into tape buffer
*/
for (trecno = 0; trecno < ntrec;
trecno += p->count, p += p->count) {
- if (p->dblk) {
+ if (p->dblk) { /* read a disk block */
bread(p->dblk, slp->tblock[trecno],
p->count * TP_BSIZE);
- } else {
+ } else { /* read record from pipe */
if (p->count != 1 || atomic_read( cmd,
(char *)slp->tblock[trecno],
TP_BSIZE) != TP_BSIZE)
quit("master/slave protocol botched.\n");
}
}
+
+ /* Try to write the data... */
+ wrote = 0;
+ eot_count = 0;
+ size = 0;
+ buffer = (char *) slp->tblock[0]; /* set write pointer */
+ bufsize = writesize; /* length to write */
+ returns.clen = returns.unclen = bufsize;
+
+#if defined(HAVE_ZLIB) || defined(HAVE_BZLIB)
+ /*
+ * When writing a compressed dump, each block except
+ * the first one on each tape is written
+ * from struct tapebuf with an 4 byte prefix
+ * followed by the data. This can be less than
+ * writesize. Restore, on a short read, can compare the
+ * length read to the compressed length in the header
+ * to verify that the read was good. Blocks which don't
+ * compress well are written uncompressed.
+ * The first block written by each slave is not compressed
+ * and does not have a prefix.
+ */
+
+ if (compressed && do_compress) {
+ comp_buf->length = bufsize;
+ worklen = TP_BSIZE + writesize;
+#ifdef HAVE_ZLIB
+ if (!bzipflag) {
+ compresult = compress2(comp_buf->buf,
+ &worklen,
+ (char *)slp->tblock[0],
+ writesize,
+ compressed);
+ if (compresult == Z_OK)
+ compresult = 1;
+ else
+ compresult = 0;
+ }
+#endif /* HAVE_ZLIB */
+#ifdef HAVE_BZLIB
+ if (bzipflag) {
+ worklen2 = worklen;
+ compresult = BZ2_bzBuffToBuffCompress(
+ comp_buf->buf,
+ &worklen2,
+ (char *)slp->tblock[0],
+ writesize,
+ compressed,
+ 0, 30);
+ worklen = worklen2;
+ if (compresult == BZ_OK)
+ compresult = 1;
+ else
+ compresult = 0;
+ }
+
+#endif /* HAVE_BZLIB */
+ if (compresult && worklen <= (writesize - 16)) {
+ /* write the compressed buffer */
+ comp_buf->length = worklen;
+ comp_buf->compressed = 1;
+ buffer = (char *) comp_buf;
+ returns.clen = bufsize = worklen + sizeof(struct tapebuf);
+ }
+ else {
+ /* write the data uncompressed */
+ comp_buf->length = writesize;
+ comp_buf->compressed = 0;
+ buffer = (char *) comp_buf;
+ returns.clen = bufsize = writesize + sizeof(struct tapebuf);
+ returns.unclen = returns.clen;
+ memcpy(comp_buf->buf, (char *)slp->tblock[0], writesize);
+ }
+ }
+ /* compress the remaining blocks if we're compressing */
+ do_compress = compressed;
+#endif /* HAVE_ZLIB || HAVE_BZLIB */
+
if (sigsetjmp(jmpbuf, 1) == 0) {
ready = 1;
if (!caught)
ready = 0;
caught = 0;
- /* Try to write the data... */
- wrote = 0;
- eot_count = 0;
- size = 0;
-
- while (eot_count < 10 && size < writesize) {
+#ifdef USE_QFA
+ if (gTapeposfd >= 0) {
+ uspclptr = (union u_spcl *)&slp->tblock[0];
+ spclptr = &uspclptr->s_spcl;
+ if ((spclptr->c_magic == NFS_MAGIC) &&
+ (spclptr->c_type == TS_INODE) &&
+ (spclptr->c_date == gThisDumpDate)) {
+ /* if an error occured previously don't
+ * try again */
+ if (gtperr == 0) {
+ if ((gtperr = GetTapePos(&curtapepos)) == 0) {
+#ifdef DEBUG_QFA
+ msg("inode %ld at tapepos %ld\n", spclptr->c_inumber, curtapepos);
+#endif
+ sprintf(gTps, "%ld\t%d\t%ld\n", (unsigned long)spclptr->c_inumber, tapeno, curtapepos);
+ if (write(gTapeposfd, gTps, strlen(gTps)) != strlen(gTps)) {
+ warn("error writing tapepos file.\n");
+ }
+ }
+ }
+ }
+ }
+#endif /* USE_QFA */
+
+ while (eot_count < 10 && size < bufsize) {
#ifdef RDUMP
if (host)
- wrote = rmtwrite(slp->tblock[0]+size,
- writesize-size);
+ wrote = rmtwrite(buffer + size, bufsize - size);
else
#endif
- wrote = write(tapefd, slp->tblock[0]+size,
- writesize-size);
+ wrote = write(tapefd, buffer + size, bufsize - size);
#ifdef WRITEDEBUG
printf("slave %d wrote %d\n", slave_number, wrote);
#endif
}
#ifdef WRITEDEBUG
- if (size != writesize)
+ if (size != bufsize)
printf("slave %d only wrote %d out of %d bytes and gave up.\n",
- slave_number, size, writesize);
+ slave_number, size, bufsize);
#endif
/*
}
if (eot_count > 0)
- size = 0;
+ returns.clen = returns.unclen = 0;
/*
* pass errno back to master for special handling
*/
if (wrote < 0)
- size = -errno;
+ returns.unclen = -errno;
/*
- * pass size of write back to master
+ * pass size of data and size of write back to master
* (for EOT handling)
*/
- (void) atomic_write( cmd, (char *)&size, sizeof size);
+ (void) atomic_write( cmd, (char *)&returns, sizeof returns);
/*
- * If partial write, don't want next slave to go.
- * Also jolts him awake.
+ * Signal the next slave to go.
*/
(void) kill(nextslave, SIGUSR2);
}
} while (got == -1 && errno == EINTR);
return (got < 0 ? got : count - need);
}
+
+
+#ifdef USE_QFA
+/*
+ * read the current tape position
+ */
+int
+GetTapePos(long *pos)
+{
+ int err = 0;
+
+ *pos = 0;
+ if (ioctl(tapefd, MTIOCPOS, pos) == -1) {
+ err = errno;
+ msg("[%ld] error: %d (getting tapepos: %ld)\n", getpid(),
+ err, *pos);
+ return err;
+ }
+ return err;
+}
+#endif /* USE_QFA */
git.wh0rd.org / dump.git / blobdiff