blob: 939a1eabf3eedf582879622e4c858e198305c8bc [file] [log] [blame]
/*
* Copyright (c) 2000 Silicon Graphics, Inc.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* doio - a general purpose io initiator with system call and
* write logging. See doio.h for the structure which defines
* what doio requests should look like.
*
* programming
* notes:
* -----------
* messages should generally be printed using doio_fprintf().
*
*/
#include "global.h"
#include <stdarg.h>
#include <sys/uio.h> /* for struct iovec (readv)*/
#include <sys/mman.h> /* for mmap(2) */
#include <sys/ipc.h> /* for i/o buffer in shared memory */
#include <sys/shm.h> /* for i/o buffer in shared memory */
#include <sys/wait.h>
#include <sys/time.h> /* for delays */
#include <ctype.h>
struct io_req;
int do_xfsctl(struct io_req *);
#include "doio.h"
#include "pattern.h"
#include "write_log.h"
#include "random_range.h"
#include "string_to_tokens.h"
#ifndef O_SSD
#define O_SSD 0 /* so code compiles on a CRAY2 */
#endif
#define UINT64_T unsigned long long
#ifndef O_PARALLEL
#define O_PARALLEL 0 /* so O_PARALLEL may be used in expressions */
#endif
#define PPID_CHECK_INTERVAL 5 /* check ppid every <-- iterations */
#define MAX_AIO 256 /* maximum number of async I/O ops */
#define MPP_BUMP 0
#define SYSERR strerror(errno)
/*
* getopt() string of supported cmdline arguments.
*/
#define OPTS "aC:d:ehm:n:kr:w:vU:V:M:N:"
#define DEF_RELEASE_INTERVAL 0
/*
* Flags set in parse_cmdline() to indicate which options were selected
* on the cmdline.
*/
int a_opt = 0; /* abort on data compare errors */
int e_opt = 0; /* exec() after fork()'ing */
int C_opt = 0; /* Data Check Type */
int d_opt = 0; /* delay between operations */
int k_opt = 0; /* lock file regions during writes */
int m_opt = 0; /* generate periodic messages */
int n_opt = 0; /* nprocs */
int r_opt = 0; /* resource release interval */
int w_opt = 0; /* file write log file */
int v_opt = 0; /* verify writes if set */
int U_opt = 0; /* upanic() on varios conditions */
int V_opt = 0; /* over-ride default validation fd type */
int M_opt = 0; /* data buffer allocation types */
char TagName[40]; /* name of this doio (see Monster) */
/*
* Misc globals initialized in parse_cmdline()
*/
char *Prog = NULL; /* set up in parse_cmdline() */
int Upanic_Conditions; /* set by args to -U */
int Release_Interval; /* arg to -r */
int Nprocs; /* arg to -n */
char *Write_Log; /* arg to -w */
char *Infile; /* input file (defaults to stdin) */
int *Children; /* pids of child procs */
int Nchildren = 0;
int Nsiblings = 0; /* tfork'ed siblings */
int Execd = 0;
int Message_Interval = 0;
int Npes = 0; /* non-zero if built as an mpp multi-pe app */
int Vpe = -1; /* Virtual pe number if Npes >= 0 */
int Reqno = 1; /* request # - used in some error messages */
int Reqskipcnt = 0; /* count of I/O requests that are skipped */
int Validation_Flags;
char *(*Data_Check)(); /* function to call for data checking */
int (*Data_Fill)(); /* function to call for data filling */
int Nmemalloc = 0; /* number of memory allocation strategies */
int delayop = 0; /* delay between operations - type of delay */
int delaytime = 0; /* delay between operations - how long */
struct wlog_file Wlog;
int active_mmap_rw = 0; /* Indicates that mmapped I/O is occurring. */
/* Used by sigbus_action() in the child doio. */
int havesigint = 0;
#define SKIP_REQ -2 /* skip I/O request */
#define NMEMALLOC 32
#define MEM_DATA 1 /* data space */
#define MEM_SHMEM 2 /* System V shared memory */
#define MEM_T3ESHMEM 3 /* T3E Shared Memory */
#define MEM_MMAP 4 /* mmap(2) */
#define MEMF_PRIVATE 0001
#define MEMF_AUTORESRV 0002
#define MEMF_LOCAL 0004
#define MEMF_SHARED 0010
#define MEMF_FIXADDR 0100
#define MEMF_ADDR 0200
#define MEMF_AUTOGROW 0400
#define MEMF_FILE 01000 /* regular file -- unlink on close */
#define MEMF_MPIN 010000 /* use mpin(2) to lock pages in memory */
struct memalloc {
int memtype;
int flags;
int nblks;
char *name;
void *space; /* memory address of allocated space */
int fd; /* FD open for mmaping */
int size;
} Memalloc[NMEMALLOC];
/*
* Global file descriptors
*/
int Wfd_Append; /* for appending to the write-log */
int Wfd_Random; /* for overlaying write-log entries */
/*
* Structure for maintaining open file test descriptors. Used by
* alloc_fd().
*/
struct fd_cache {
char c_file[MAX_FNAME_LENGTH+1];
int c_oflags;
int c_fd;
long c_rtc;
int c_memalign; /* from xfsctl(XFS_IOC_DIOINFO) */
int c_miniosz;
int c_maxiosz;
void *c_memaddr; /* mmapped address */
int c_memlen; /* length of above region */
};
#define FD_ALLOC_INCR 32 /* allocate this many fd_map structs */
/* at a time */
/*
* Globals for tracking Sds and Core usage
*/
char *Memptr; /* ptr to core buffer space */
int Memsize; /* # bytes pointed to by Memptr */
/* maintained by alloc_mem() */
int Sdsptr; /* sds offset (always 0) */
int Sdssize; /* # bytes of allocated sds space */
/* Maintained by alloc_sds() */
char Host[16];
char Pattern[128];
int Pattern_Length;
/*
* Signal handlers, and related globals
*/
void sigint_handler(); /* Catch SIGINT in parent doio, propagate
* to children, does not die. */
void die_handler(); /* Bad sig in child doios, exit 1. */
void cleanup_handler(); /* Normal kill, exit 0. */
void sigbus_handler(); /* Handle sigbus--check active_mmap_rw to
decide if this should be a normal exit. */
void cb_handler(); /* Posix aio callback handler. */
void noop_handler(); /* Delayop alarm, does nothing. */
char *hms(time_t t);
char *format_rw();
char *format_sds();
char *format_listio();
char *check_file(char *file, int offset, int length, char *pattern,
int pattern_length, int patshift, int fsa);
int doio_fprintf(FILE *stream, char *format, ...);
void doio_upanic(int mask);
void doio();
void help(FILE *stream);
void doio_delay();
int alloc_fd( char *, int );
int alloc_mem( int );
int do_read( struct io_req * );
int do_write( struct io_req * );
int do_rw( struct io_req * );
int do_sync( struct io_req * );
int usage( FILE * );
int aio_unregister( int );
int parse_cmdline( int, char **, char * );
int lock_file_region( char *, int, int, int, int );
struct fd_cache *alloc_fdcache(char *, int);
int aio_register( int, int, int );
#ifndef linux
int aio_wait(int);
#endif
/*
* Upanic conditions, and a map from symbolics to values
*/
#define U_CORRUPTION 0001 /* upanic on data corruption */
#define U_IOSW 0002 /* upanic on bad iosw */
#define U_RVAL 0004 /* upanic on bad rval */
#define U_ALL (U_CORRUPTION | U_IOSW | U_RVAL)
/*
* Name-To-Value map
* Used to map cmdline arguments to values
*/
struct smap {
char *string;
int value;
};
struct smap Upanic_Args[] = {
{ "corruption", U_CORRUPTION },
{ "iosw", U_IOSW },
{ "rval", U_RVAL },
{ "all", U_ALL },
{ NULL, 0 }
};
struct aio_info {
int busy;
int id;
int fd;
int strategy;
volatile int done;
int sig;
int signalled;
struct sigaction osa;
};
struct aio_info Aio_Info[MAX_AIO];
struct aio_info *aio_slot();
int aio_done( struct aio_info * );
/* -C data-fill/check type */
#define C_DEFAULT 1
struct smap checkmap[] = {
{ "default", C_DEFAULT },
{ NULL, 0 },
};
/* -d option delay types */
#define DELAY_SELECT 1
#define DELAY_SLEEP 2
#define DELAY_SGINAP 3
#define DELAY_ALARM 4
#define DELAY_ITIMER 5 /* POSIX timer */
struct smap delaymap[] = {
{ "select", DELAY_SELECT },
{ "sleep", DELAY_SLEEP },
{ "alarm", DELAY_ALARM },
{ NULL, 0 },
};
/******
*
* strerror() does similar actions.
char *
syserrno(int err)
{
static char sys_errno[10];
sprintf(sys_errno, "%d", errno);
return(sys_errno);
}
******/
int
main(argc, argv)
int argc;
char **argv;
{
int i, pid, stat, ex_stat;
struct sigaction sa;
sigset_t block_mask, old_mask;
umask(0); /* force new file modes to known values */
TagName[0] = '\0';
parse_cmdline(argc, argv, OPTS);
random_range_seed(getpid()); /* initialize random number generator */
/*
* If this is a re-exec of doio, jump directly into the doio function.
*/
if (Execd) {
doio();
exit(E_SETUP);
}
/*
* Stop on all but a few signals...
*/
sigemptyset(&sa.sa_mask);
sa.sa_handler = sigint_handler;
sa.sa_flags = SA_RESETHAND; /* sigint is ignored after the */
/* first time */
for (i = 1; i <= NSIG; i++) {
switch(i) {
#ifdef SIGRECOVERY
case SIGRECOVERY:
break;
#endif
#ifdef SIGCKPT
case SIGCKPT:
#endif
#ifdef SIGRESTART
case SIGRESTART:
#endif
case SIGTSTP:
case SIGSTOP:
case SIGCONT:
case SIGCHLD:
case SIGBUS:
case SIGSEGV:
case SIGQUIT:
break;
default:
sigaction(i, &sa, NULL);
}
}
/*
* If we're logging write operations, make a dummy call to wlog_open
* to initialize the write history file. This call must be done in
* the parent, to ensure that the history file exists and/or has
* been truncated before any children attempt to open it, as the doio
* children are not allowed to truncate the file.
*/
if (w_opt) {
strcpy(Wlog.w_file, Write_Log);
if (wlog_open(&Wlog, 1, 0666) < 0) {
doio_fprintf(stderr,
"Could not create/truncate write log %s\n",
Write_Log);
exit(2);
}
wlog_close(&Wlog);
}
/*
* Malloc space for the children pid array. Initialize all entries
* to -1.
*/
Children = (int *)malloc(sizeof(int) * Nprocs);
for (i = 0; i < Nprocs; i++) {
Children[i] = -1;
}
sigemptyset(&block_mask);
sigaddset(&block_mask, SIGCHLD);
sigprocmask(SIG_BLOCK, &block_mask, &old_mask);
/*
* Fork Nprocs. This [parent] process is a watchdog, to notify the
* invoker of procs which exit abnormally, and to make sure that all
* child procs get cleaned up. If the -e option was used, we will also
* re-exec. This is mostly for unicos/mk on mpp's, to ensure that not
* all of the doio's don't end up in the same pe.
*
* Note - if Nprocs is 1, or this doio is a multi-pe app (Npes > 1),
* jump directly to doio(). multi-pe apps can't fork(), and there is
* no reason to fork() for 1 proc.
*/
if (Nprocs == 1 || Npes > 1) {
doio();
exit(0);
} else {
for (i = 0; i < Nprocs; i++) {
if ((pid = fork()) == -1) {
doio_fprintf(stderr,
"(parent) Could not fork %d children: %s (%d)\n",
i+1, SYSERR, errno);
exit(E_SETUP);
}
Children[Nchildren] = pid;
Nchildren++;
if (pid == 0) {
if (e_opt) {
char *exec_path;
exec_path = argv[0];
argv[0] = (char *)malloc(strlen(exec_path + 1));
sprintf(argv[0], "-%s", exec_path);
execvp(exec_path, argv);
doio_fprintf(stderr,
"(parent) Could not execvp %s: %s (%d)\n",
exec_path, SYSERR, errno);
exit(E_SETUP);
} else {
doio();
exit(E_SETUP);
}
}
}
/*
* Parent spins on wait(), until all children exit.
*/
ex_stat = E_NORMAL;
while (Nprocs) {
if ((pid = wait(&stat)) == -1) {
if (errno == EINTR)
continue;
}
for (i = 0; i < Nchildren; i++)
if (Children[i] == pid)
Children[i] = -1;
Nprocs--;
if (WIFEXITED(stat)) {
switch (WEXITSTATUS(stat)) {
case E_NORMAL:
/* noop */
break;
case E_INTERNAL:
doio_fprintf(stderr,
"(parent) pid %d exited because of an internal error\n",
pid);
ex_stat |= E_INTERNAL;
break;
case E_SETUP:
doio_fprintf(stderr,
"(parent) pid %d exited because of a setup error\n",
pid);
ex_stat |= E_SETUP;
break;
case E_COMPARE:
doio_fprintf(stderr,
"(parent) pid %d exited because of data compare errors\n",
pid);
ex_stat |= E_COMPARE;
if (a_opt)
kill(0, SIGINT);
break;
case E_USAGE:
doio_fprintf(stderr,
"(parent) pid %d exited because of a usage error\n",
pid);
ex_stat |= E_USAGE;
break;
default:
doio_fprintf(stderr,
"(parent) pid %d exited with unknown status %d\n",
pid, WEXITSTATUS(stat));
ex_stat |= E_INTERNAL;
break;
}
} else if (WIFSIGNALED(stat) && WTERMSIG(stat) != SIGINT) {
doio_fprintf(stderr,
"(parent) pid %d terminated by signal %d\n",
pid, WTERMSIG(stat));
ex_stat |= E_SIGNAL;
}
fflush(NULL);
}
}
exit(ex_stat);
} /* main */
/*
* main doio function. Each doio child starts here, and never returns.
*/
void
doio()
{
int rval, i, infd, nbytes;
char *cp;
struct io_req ioreq;
struct sigaction sa, def_action, ignore_action, exit_action;
struct sigaction sigbus_action;
Memsize = Sdssize = 0;
/*
* Initialize the Pattern - write-type syscalls will replace Pattern[1]
* with the pattern passed in the request. Make sure that
* strlen(Pattern) is not mod 16 so that out of order words will be
* detected.
*/
gethostname(Host, sizeof(Host));
if ((cp = strchr(Host, '.')) != NULL)
*cp = '\0';
Pattern_Length = sprintf(Pattern, "-:%d:%s:%s*", (int)getpid(), Host, Prog);
if (!(Pattern_Length % 16)) {
Pattern_Length = sprintf(Pattern, "-:%d:%s:%s**",
(int)getpid(), Host, Prog);
}
/*
* Open a couple of descriptors for the write-log file. One descriptor
* is for appending, one for random access. Write logging is done for
* file corruption detection. The program doio_check is capable of
* doing corruption detection based on a doio write-log.
*/
if (w_opt) {
strcpy(Wlog.w_file, Write_Log);
if (wlog_open(&Wlog, 0, 0666) == -1) {
doio_fprintf(stderr,
"Could not open write log file (%s): wlog_open() failed\n",
Write_Log);
exit(E_SETUP);
}
}
/*
* Open the input stream - either a file or stdin
*/
if (Infile == NULL) {
infd = 0;
} else {
if ((infd = open(Infile, O_RDWR)) == -1) {
doio_fprintf(stderr,
"Could not open input file (%s): %s (%d)\n",
Infile, SYSERR, errno);
exit(E_SETUP);
}
}
/*
* Define a set of signals that should never be masked. Receipt of
* these signals generally indicates a programming error, and we want
* a corefile at the point of error. We put SIGQUIT in this list so
* that ^\ will force a user core dump.
*
* Note: the handler for these should be SIG_DFL, all of them
* produce a corefile as the default action.
*/
ignore_action.sa_handler = SIG_IGN;
ignore_action.sa_flags = 0;
sigemptyset(&ignore_action.sa_mask);
def_action.sa_handler = SIG_DFL;
def_action.sa_flags = 0;
sigemptyset(&def_action.sa_mask);
exit_action.sa_handler = cleanup_handler;
exit_action.sa_flags = 0;
sigemptyset(&exit_action.sa_mask);
sa.sa_handler = die_handler;
sa.sa_flags = 0;
sigemptyset(&sa.sa_mask);
sigbus_action.sa_handler = sigbus_handler;
sigbus_action.sa_flags = 0;
sigemptyset(&sigbus_action.sa_mask);
for (i = 1; i <= NSIG; i++) {
switch(i) {
/* Signals to terminate program on */
case SIGINT:
sigaction(i, &exit_action, NULL);
break;
/* This depends on active_mmap_rw */
case SIGBUS:
sigaction(i, &sigbus_action, NULL);
break;
/* Signals to Ignore... */
case SIGSTOP:
case SIGCONT:
#ifdef SIGRECOVERY
case SIGRECOVERY:
#endif
sigaction(i, &ignore_action, NULL);
break;
/* Signals to trap & report & die */
/*case SIGTRAP:*/
/*case SIGABRT:*/
#ifdef SIGERR /* cray only signals */
case SIGERR:
case SIGBUFIO:
case SIGINFO:
#endif
/*case SIGFPE:*/
case SIGURG:
case SIGHUP:
case SIGTERM:
case SIGPIPE:
case SIGIO:
case SIGUSR1:
case SIGUSR2:
sigaction(i, &sa, NULL);
break;
/* Default Action for all other signals */
default:
sigaction(i, &def_action, NULL);
break;
}
}
/*
* Main loop - each doio proc does this until the read returns eof (0).
* Call the appropriate io function based on the request type.
*/
while ((nbytes = read(infd, (char *)&ioreq, sizeof(ioreq)))) {
/*
* Periodically check our ppid. If it is 1, the child exits to
* help clean up in the case that the main doio process was
* killed.
*/
if (Reqno && ((Reqno % PPID_CHECK_INTERVAL) == 0)) {
if (getppid() == 1) {
doio_fprintf(stderr,
"Parent doio process has exited\n");
alloc_mem(-1);
exit(E_SETUP);
}
}
if (nbytes == -1) {
doio_fprintf(stderr,
"read of %d bytes from input failed: %s (%d)\n",
sizeof(ioreq), SYSERR, errno);
alloc_mem(-1);
exit(E_SETUP);
}
if (nbytes != sizeof(ioreq)) {
doio_fprintf(stderr,
"read wrong # bytes from input stream, expected %d, got %d\n",
sizeof(ioreq), nbytes);
alloc_mem(-1);
exit(E_SETUP);
}
if (ioreq.r_magic != DOIO_MAGIC) {
doio_fprintf(stderr,
"got a bad magic # from input stream. Expected 0%o, got 0%o\n",
DOIO_MAGIC, ioreq.r_magic);
alloc_mem(-1);
exit(E_SETUP);
}
/*
* If we're on a Release_Interval multiple, relase all ssd and
* core space, and close all fd's in Fd_Map[].
*/
if (Reqno && Release_Interval && ! (Reqno%Release_Interval)) {
if (Memsize) {
#ifdef NOTDEF
sbrk(-1 * Memsize);
#else
alloc_mem(-1);
#endif
}
alloc_fd(NULL, 0);
}
switch (ioreq.r_type) {
case READ:
case READA:
rval = do_read(&ioreq);
break;
case WRITE:
case WRITEA:
rval = do_write(&ioreq);
break;
case READV:
case AREAD:
case PREAD:
case LREAD:
case LREADA:
case LSREAD:
case LSREADA:
case WRITEV:
case AWRITE:
case PWRITE:
case MMAPR:
case MMAPW:
case LWRITE:
case LWRITEA:
case LSWRITE:
case LSWRITEA:
case LEREAD:
case LEREADA:
case LEWRITE:
case LEWRITEA:
rval = do_rw(&ioreq);
break;
case RESVSP:
case UNRESVSP:
rval = do_xfsctl(&ioreq);
break;
case FSYNC2:
case FDATASYNC:
rval = do_sync(&ioreq);
break;
default:
doio_fprintf(stderr,
"Don't know how to handle io request type %d\n",
ioreq.r_type);
alloc_mem(-1);
exit(E_SETUP);
}
if (rval == SKIP_REQ){
Reqskipcnt++;
}
else if (rval != 0) {
alloc_mem(-1);
doio_fprintf(stderr,
"doio(): operation %d returned != 0\n",
ioreq.r_type);
exit(E_SETUP);
}
if (Message_Interval && Reqno % Message_Interval == 0) {
doio_fprintf(stderr, "Info: %d requests done (%d skipped) by this process\n", Reqno, Reqskipcnt);
}
Reqno++;
if(delayop != 0)
doio_delay();
}
/*
* Child exits normally
*/
alloc_mem(-1);
exit(E_NORMAL);
} /* doio */
void
doio_delay()
{
struct timeval tv_delay;
struct sigaction sa_al, sa_old;
sigset_t al_mask;
switch(delayop) {
case DELAY_SELECT:
tv_delay.tv_sec = delaytime / 1000000;
tv_delay.tv_usec = delaytime % 1000000;
/*doio_fprintf(stdout, "delay_select: %d %d\n",
tv_delay.tv_sec, tv_delay.tv_usec);*/
select(0, NULL, NULL, NULL, &tv_delay);
break;
case DELAY_SLEEP:
sleep(delaytime);
break;
case DELAY_ALARM:
sa_al.sa_flags = 0;
sa_al.sa_handler = noop_handler;
sigemptyset(&sa_al.sa_mask);
sigaction(SIGALRM, &sa_al, &sa_old);
sigemptyset(&al_mask);
alarm(delaytime);
sigsuspend(&al_mask);
sigaction(SIGALRM, &sa_old, 0);
break;
}
}
/*
* Format IO requests, returning a pointer to the formatted text.
*
* format_strat - formats the async i/o completion strategy
* format_rw - formats a read[a]/write[a] request
* format_sds - formats a ssread/sswrite request
* format_listio- formats a listio request
*
* ioreq is the doio io request structure.
*/
struct smap sysnames[] = {
{ "READ", READ },
{ "WRITE", WRITE },
{ "READA", READA },
{ "WRITEA", WRITEA },
{ "SSREAD", SSREAD },
{ "SSWRITE", SSWRITE },
{ "LISTIO", LISTIO },
{ "LREAD", LREAD },
{ "LREADA", LREADA },
{ "LWRITE", LWRITE },
{ "LWRITEA", LWRITEA },
{ "LSREAD", LSREAD },
{ "LSREADA", LSREADA },
{ "LSWRITE", LSWRITE },
{ "LSWRITEA", LSWRITEA },
/* Irix System Calls */
{ "PREAD", PREAD },
{ "PWRITE", PWRITE },
{ "AREAD", AREAD },
{ "AWRITE", AWRITE },
{ "LLREAD", LLREAD },
{ "LLAREAD", LLAREAD },
{ "LLWRITE", LLWRITE },
{ "LLAWRITE", LLAWRITE },
{ "RESVSP", RESVSP },
{ "UNRESVSP", UNRESVSP },
/* Irix and Linux System Calls */
{ "READV", READV },
{ "WRITEV", WRITEV },
{ "MMAPR", MMAPR },
{ "MMAPW", MMAPW },
{ "FSYNC2", FSYNC2 },
{ "FDATASYNC", FDATASYNC },
{ "unknown", -1 },
};
struct smap aionames[] = {
{ "poll", A_POLL },
{ "signal", A_SIGNAL },
{ "recall", A_RECALL },
{ "recalla", A_RECALLA },
{ "recalls", A_RECALLS },
{ "suspend", A_SUSPEND },
{ "callback", A_CALLBACK },
{ "synch", 0 },
{ "unknown", -1 },
};
char *
format_oflags(int oflags)
{
char flags[255];
flags[0]='\0';
switch(oflags & 03) {
case O_RDONLY: strcat(flags,"O_RDONLY,"); break;
case O_WRONLY: strcat(flags,"O_WRONLY,"); break;
case O_RDWR: strcat(flags,"O_RDWR,"); break;
default: strcat(flags,"O_weird"); break;
}
if(oflags & O_EXCL)
strcat(flags,"O_EXCL,");
if(oflags & O_SYNC)
strcat(flags,"O_SYNC,");
if(oflags & O_DIRECT)
strcat(flags,"O_DIRECT,");
return(strdup(flags));
}
char *
format_strat(int strategy)
{
char msg[64];
char *aio_strat;
switch (strategy) {
case A_POLL: aio_strat = "POLL"; break;
case A_SIGNAL: aio_strat = "SIGNAL"; break;
case A_RECALL: aio_strat = "RECALL"; break;
case A_RECALLA: aio_strat = "RECALLA"; break;
case A_RECALLS: aio_strat = "RECALLS"; break;
case A_SUSPEND: aio_strat = "SUSPEND"; break;
case A_CALLBACK: aio_strat = "CALLBACK"; break;
case 0: aio_strat = "<zero>"; break;
default:
sprintf(msg, "<error:%#o>", strategy);
aio_strat = strdup(msg);
break;
}
return(aio_strat);
}
char *
format_rw(
struct io_req *ioreq,
int fd,
void *buffer,
int signo,
char *pattern,
void *iosw
)
{
static char *errbuf=NULL;
char *aio_strat, *cp;
struct read_req *readp = &ioreq->r_data.read;
struct write_req *writep = &ioreq->r_data.write;
struct read_req *readap = &ioreq->r_data.read;
struct write_req *writeap = &ioreq->r_data.write;
if(errbuf == NULL)
errbuf = (char *)malloc(32768);
cp = errbuf;
cp += sprintf(cp, "Request number %d\n", Reqno);
switch (ioreq->r_type) {
case READ:
cp += sprintf(cp, "syscall: read(%d, %#lo, %d)\n",
fd, (unsigned long) buffer, readp->r_nbytes);
cp += sprintf(cp, " fd %d is file %s - open flags are %#o\n",
fd, readp->r_file, readp->r_oflags);
cp += sprintf(cp, " read done at file offset %d\n",
readp->r_offset);
break;
case WRITE:
cp += sprintf(cp, "syscall: write(%d, %#lo, %d)\n",
fd, (unsigned long) buffer, writep->r_nbytes);
cp += sprintf(cp, " fd %d is file %s - open flags are %#o\n",
fd, writep->r_file, writep->r_oflags);
cp += sprintf(cp, " write done at file offset %d - pattern is %s\n",
writep->r_offset, pattern);
break;
case READA:
aio_strat = format_strat(readap->r_aio_strat);
cp += sprintf(cp, "syscall: reada(%d, %#lo, %d, %#lo, %d)\n",
fd, (unsigned long) buffer, readap->r_nbytes,
(unsigned long) iosw, signo);
cp += sprintf(cp, " fd %d is file %s - open flags are %#o\n",
fd, readap->r_file, readp->r_oflags);
cp += sprintf(cp, " reada done at file offset %d\n",
readap->r_offset);
cp += sprintf(cp, " async io completion strategy is %s\n",
aio_strat);
break;
case WRITEA:
aio_strat = format_strat(writeap->r_aio_strat);
cp += sprintf(cp, "syscall: writea(%d, %#lo, %d, %#lo, %d)\n",
fd, (unsigned long) buffer, writeap->r_nbytes,
(unsigned long) iosw, signo);
cp += sprintf(cp, " fd %d is file %s - open flags are %#o\n",
fd, writeap->r_file, writeap->r_oflags);
cp += sprintf(cp, " writea done at file offset %d - pattern is %s\n",
writeap->r_offset, pattern);
cp += sprintf(cp, " async io completion strategy is %s\n",
aio_strat);
break;
}
return errbuf;
}
/*
* Perform the various sorts of disk reads
*/
int
do_read(req)
struct io_req *req;
{
int fd, offset, nbytes, oflags, rval;
char *addr, *file;
struct fd_cache *fdc;
/*
* Initialize common fields - assumes r_oflags, r_file, r_offset, and
* r_nbytes are at the same offset in the read_req and reada_req
* structures.
*/
file = req->r_data.read.r_file;
oflags = req->r_data.read.r_oflags;
offset = req->r_data.read.r_offset;
nbytes = req->r_data.read.r_nbytes;
/*printf("read: %s, %#o, %d %d\n", file, oflags, offset, nbytes);*/
/*
* Grab an open file descriptor
* Note: must be done before memory allocation so that the direct i/o
* information is available in mem. allocate
*/
if ((fd = alloc_fd(file, oflags)) == -1)
return -1;
/*
* Allocate core or sds - based on the O_SSD flag
*/
#ifndef wtob
#define wtob(x) (x * sizeof(UINT64_T))
#endif
/* get memory alignment for using DIRECT I/O */
fdc = alloc_fdcache(file, oflags);
if ((rval = alloc_mem(nbytes + wtob(1) * 2 + fdc->c_memalign)) < 0) {
return rval;
}
addr = Memptr;
if( (req->r_data.read.r_uflags & F_WORD_ALIGNED) ) {
/*
* Force memory alignment for Direct I/O
*/
if( (oflags & O_DIRECT) && ((long)addr % fdc->c_memalign != 0) ) {
addr += fdc->c_memalign - ((long)addr % fdc->c_memalign);
}
} else {
addr += random_range(0, wtob(1) - 1, 1, NULL);
}
switch (req->r_type) {
case READ:
/* move to the desired file position. */
if (lseek(fd, offset, SEEK_SET) == -1) {
doio_fprintf(stderr,
"lseek(%d, %d, SEEK_SET) failed: %s (%d)\n",
fd, offset, SYSERR, errno);
return -1;
}
if ((rval = read(fd, addr, nbytes)) == -1) {
doio_fprintf(stderr,
"read() request failed: %s (%d)\n%s\n",
SYSERR, errno,
format_rw(req, fd, addr, -1, NULL, NULL));
doio_upanic(U_RVAL);
return -1;
} else if (rval != nbytes) {
doio_fprintf(stderr,
"read() request returned wrong # of bytes - expected %d, got %d\n%s\n",
nbytes, rval,
format_rw(req, fd, addr, -1, NULL, NULL));
doio_upanic(U_RVAL);
return -1;
}
break;
}
return 0; /* if we get here, everything went ok */
}
/*
* Perform the verious types of disk writes.
*/
int
do_write(req)
struct io_req *req;
{
static int pid = -1;
int fd, nbytes, oflags;
/* REFERENCED */
int logged_write, rval, got_lock;
long offset, woffset = 0;
char *addr, pattern, *file, *msg;
struct wlog_rec wrec;
struct fd_cache *fdc;
/*
* Misc variable setup
*/
nbytes = req->r_data.write.r_nbytes;
offset = req->r_data.write.r_offset;
pattern = req->r_data.write.r_pattern;
file = req->r_data.write.r_file;
oflags = req->r_data.write.r_oflags;
/*printf("pwrite: %s, %#o, %d %d\n", file, oflags, offset, nbytes);*/
/*
* Allocate core memory and possibly sds space. Initialize the data
* to be written.
*/
Pattern[0] = pattern;
/*
* Get a descriptor to do the io on
*/
if ((fd = alloc_fd(file, oflags)) == -1)
return -1;
/*printf("write: %d, %s, %#o, %d %d\n",
fd, file, oflags, offset, nbytes);*/
/*
* Allocate SDS space for backdoor write if desired
*/
/* get memory alignment for using DIRECT I/O */
fdc = alloc_fdcache(file, oflags);
if ((rval = alloc_mem(nbytes + wtob(1) * 2 + fdc->c_memalign)) < 0) {
return rval;
}
addr = Memptr;
if( (req->r_data.write.r_uflags & F_WORD_ALIGNED) ) {
/*
* Force memory alignment for Direct I/O
*/
if( (oflags & O_DIRECT) && ((long)addr % fdc->c_memalign != 0) ) {
addr += fdc->c_memalign - ((long)addr % fdc->c_memalign);
}
} else {
addr += random_range(0, wtob(1) - 1, 1, NULL);
}
(*Data_Fill)(Memptr, nbytes, Pattern, Pattern_Length, 0);
if( addr != Memptr )
memmove( addr, Memptr, nbytes);
rval = -1;
got_lock = 0;
logged_write = 0;
if (k_opt) {
if (lock_file_region(file, fd, F_WRLCK, offset, nbytes) < 0) {
alloc_mem(-1);
exit(E_INTERNAL);
}
got_lock = 1;
}
/*
* Write a preliminary write-log entry. This is done so that
* doio_check can do corruption detection across an interrupt/crash.
* Note that w_done is set to 0. If doio_check sees this, it
* re-creates the file extents as if the write completed, but does not
* do any checking - see comments in doio_check for more details.
*/
if (w_opt) {
if (pid == -1) {
pid = getpid();
}
wrec.w_async = (req->r_type == WRITEA) ? 1 : 0;
wrec.w_oflags = oflags;
wrec.w_pid = pid;
wrec.w_offset = offset;
wrec.w_nbytes = nbytes;
wrec.w_pathlen = strlen(file);
memcpy(wrec.w_path, file, wrec.w_pathlen);
wrec.w_hostlen = strlen(Host);
memcpy(wrec.w_host, Host, wrec.w_hostlen);
wrec.w_patternlen = Pattern_Length;
memcpy(wrec.w_pattern, Pattern, wrec.w_patternlen);
wrec.w_done = 0;
if ((woffset = wlog_record_write(&Wlog, &wrec, -1)) == -1) {
doio_fprintf(stderr,
"Could not append to write-log: %s (%d)\n",
SYSERR, errno);
} else {
logged_write = 1;
}
}
switch (req->r_type ) {
case WRITE:
/*
* sync write
*/
if (lseek(fd, offset, SEEK_SET) == -1) {
doio_fprintf(stderr,
"lseek(%d, %d, SEEK_SET) failed: %s (%d)\n",
fd, offset, SYSERR, errno);
return -1;
}
rval = write(fd, addr, nbytes);
if (rval == -1) {
doio_fprintf(stderr,
"write() failed: %s (%d)\n%s\n",
SYSERR, errno,
format_rw(req, fd, addr, -1, Pattern, NULL));
doio_fprintf(stderr,
"write() failed: %s\n\twrite(%d, %#o, %d)\n\toffset %d, nbytes%%miniou(%d)=%d, oflags=%#o memalign=%d, addr%%memalign=%d\n",
strerror(errno),
fd, addr, nbytes,
offset,
fdc->c_miniosz, nbytes%fdc->c_miniosz,
oflags, fdc->c_memalign, (long)addr%fdc->c_memalign);
doio_upanic(U_RVAL);
} else if (rval != nbytes) {
doio_fprintf(stderr,
"write() returned wrong # bytes - expected %d, got %d\n%s\n",
nbytes, rval,
format_rw(req, fd, addr, -1, Pattern, NULL));
doio_upanic(U_RVAL);
rval = -1;
}
break;
}
/*
* Verify that the data was written correctly - check_file() returns
* a non-null pointer which contains an error message if there are
* problems.
*/
if (v_opt) {
msg = check_file(file, offset, nbytes, Pattern, Pattern_Length,
0, oflags & O_PARALLEL);
if (msg != NULL) {
doio_fprintf(stderr, "%s%s\n",
msg,
format_rw(req, fd, addr, -1, Pattern, NULL)
);
doio_upanic(U_CORRUPTION);
exit(E_COMPARE);
}
}
/*
* General cleanup ...
*
* Write extent information to the write-log, so that doio_check can do
* corruption detection. Note that w_done is set to 1, indicating that
* the write has been verified as complete. We don't need to write the
* filename on the second logging.
*/
if (w_opt && logged_write) {
wrec.w_done = 1;
wlog_record_write(&Wlog, &wrec, woffset);
}
/*
* Unlock file region if necessary
*/
if (got_lock) {
if (lock_file_region(file, fd, F_UNLCK, offset, nbytes) < 0) {
alloc_mem(-1);
exit(E_INTERNAL);
}
}
return( (rval == -1) ? -1 : 0);
}
/*
* Simple routine to lock/unlock a file using fcntl()
*/
int
lock_file_region(fname, fd, type, start, nbytes)
char *fname;
int fd;
int type;
int start;
int nbytes;
{
struct flock flk;
flk.l_type = type;
flk.l_whence = 0;
flk.l_start = start;
flk.l_len = nbytes;
if (fcntl(fd, F_SETLKW, &flk) < 0) {
doio_fprintf(stderr,
"fcntl(%d, %d, %#o) failed for file %s, lock type %d, offset %d, length %d: %s (%d), open flags: %#o\n",
fd, F_SETLKW, &flk, fname, type,
start, nbytes, SYSERR, errno,
fcntl(fd, F_GETFL, 0));
return -1;
}
return 0;
}
int
do_listio(req)
struct io_req *req;
{
return -1;
}
/* ---------------------------------------------------------------------------
*
* A new paradigm of doing the r/w system call where there is a "stub"
* function that builds the info for the system call, then does the system
* call; this is called by code that is common to all system calls and does
* the syscall return checking, async I/O wait, iosw check, etc.
*
* Flags:
* WRITE, ASYNC, SSD/SDS,
* FILE_LOCK, WRITE_LOG, VERIFY_DATA,
*/
struct status {
int rval; /* syscall return */
int err; /* errno */
int *aioid; /* list of async I/O structures */
};
struct syscall_info {
char *sy_name;
int sy_type;
struct status *(*sy_syscall)();
int (*sy_buffer)();
char *(*sy_format)();
int sy_flags;
int sy_bits;
};
#define SY_WRITE 00001
#define SY_ASYNC 00010
#define SY_IOSW 00020
#define SY_SDS 00100
char *
fmt_ioreq(struct io_req *ioreq, struct syscall_info *sy, int fd)
{
static char *errbuf=NULL;
char *cp;
struct rw_req *io;
struct smap *aname;
if(errbuf == NULL)
errbuf = (char *)malloc(32768);
io = &ioreq->r_data.io;
/*
* Look up async I/O completion strategy
*/
for(aname=aionames;
aname->value != -1 && aname->value != io->r_aio_strat;
aname++)
;
cp = errbuf;
cp += sprintf(cp, "Request number %d\n", Reqno);
cp += sprintf(cp, " fd %d is file %s - open flags are %#o %s\n",
fd, io->r_file, io->r_oflags, format_oflags(io->r_oflags));
if(sy->sy_flags & SY_WRITE) {
cp += sprintf(cp, " write done at file offset %d - pattern is %c (%#o)\n",
io->r_offset,
(io->r_pattern == '\0') ? '?' : io->r_pattern,
io->r_pattern);
} else {
cp += sprintf(cp, " read done at file offset %d\n",
io->r_offset);
}
if(sy->sy_flags & SY_ASYNC) {
cp += sprintf(cp, " async io completion strategy is %s\n",
aname->string);
}
cp += sprintf(cp, " number of requests is %d, strides per request is %d\n",
io->r_nent, io->r_nstrides);
cp += sprintf(cp, " i/o byte count = %d\n",
io->r_nbytes);
cp += sprintf(cp, " memory alignment is %s\n",
(io->r_uflags & F_WORD_ALIGNED) ? "aligned" : "unaligned");
if(io->r_oflags & O_DIRECT) {
char *dio_env;
struct dioattr finfo;
if(xfsctl(io->r_file, fd, XFS_IOC_DIOINFO, &finfo) == -1) {
cp += sprintf(cp, " Error %s (%d) getting direct I/O info\n",
strerror(errno), errno);
finfo.d_mem = 1;
finfo.d_miniosz = 1;
finfo.d_maxiosz = 1;
}
dio_env = getenv("XFS_DIO_MIN");
if (dio_env)
finfo.d_mem = finfo.d_miniosz = atoi(dio_env);
cp += sprintf(cp, " DIRECT I/O: offset %% %d = %d length %% %d = %d\n",
finfo.d_miniosz,
io->r_offset % finfo.d_miniosz,
io->r_nbytes,
io->r_nbytes % finfo.d_miniosz);
cp += sprintf(cp, " mem alignment 0x%x xfer size: small: %d large: %d\n",
finfo.d_mem, finfo.d_miniosz, finfo.d_maxiosz);
}
return(errbuf);
}
struct status *
sy_pread(req, sysc, fd, addr)
struct io_req *req;
struct syscall_info *sysc;
int fd;
char *addr;
{
int rc;
struct status *status;
rc = pread(fd, addr, req->r_data.io.r_nbytes,
req->r_data.io.r_offset);
status = (struct status *)malloc(sizeof(struct status));
if( status == NULL ){
doio_fprintf(stderr, "malloc failed, %s/%d\n",
__FILE__, __LINE__);
return NULL;
}
status->aioid = NULL;
status->rval = rc;
status->err = errno;
return(status);
}
struct status *
sy_pwrite(req, sysc, fd, addr)
struct io_req *req;
struct syscall_info *sysc;
int fd;
char *addr;
{
int rc;
struct status *status;
rc = pwrite(fd, addr, req->r_data.io.r_nbytes,
req->r_data.io.r_offset);
status = (struct status *)malloc(sizeof(struct status));
if( status == NULL ){
doio_fprintf(stderr, "malloc failed, %s/%d\n",
__FILE__, __LINE__);
return NULL;
}
status->aioid = NULL;
status->rval = rc;
status->err = errno;
return(status);
}
char *
fmt_pread(struct io_req *req, struct syscall_info *sy, int fd, char *addr)
{
static char *errbuf = NULL;
char *cp;
if(errbuf == NULL){
errbuf = (char *)malloc(32768);
if( errbuf == NULL ){
doio_fprintf(stderr, "malloc failed, %s/%d\n",
__FILE__, __LINE__);
return NULL;
}
}
cp = errbuf;
cp += sprintf(cp, "syscall: %s(%d, 0x%p, %d)\n",
sy->sy_name, fd, addr, req->r_data.io.r_nbytes);
return(errbuf);
}
struct status *
sy_rwv(req, sysc, fd, addr, rw)
struct io_req *req;
struct syscall_info *sysc;
int fd;
char *addr;
int rw;
{
int rc;
struct status *status;
struct iovec iov[2];
status = (struct status *)malloc(sizeof(struct status));
if( status == NULL ){
doio_fprintf(stderr, "malloc failed, %s/%d\n",
__FILE__, __LINE__);
return NULL;
}
status->aioid = NULL;
/* move to the desired file position. */
if ((rc=lseek(fd, req->r_data.io.r_offset, SEEK_SET)) == -1) {
status->rval = rc;
status->err = errno;
return(status);
}
iov[0].iov_base = addr;
iov[0].iov_len = req->r_data.io.r_nbytes;
if(rw)
rc = writev(fd, iov, 1);
else
rc = readv(fd, iov, 1);
status->aioid = NULL;
status->rval = rc;
status->err = errno;
return(status);
}
struct status *
sy_readv(req, sysc, fd, addr)
struct io_req *req;
struct syscall_info *sysc;
int fd;
char *addr;
{
return sy_rwv(req, sysc, fd, addr, 0);
}
struct status *
sy_writev(req, sysc, fd, addr)
struct io_req *req;
struct syscall_info *sysc;
int fd;
char *addr;
{
return sy_rwv(req, sysc, fd, addr, 1);
}
char *
fmt_readv(struct io_req *req, struct syscall_info *sy, int fd, char *addr)
{
static char errbuf[32768];
char *cp;
cp = errbuf;
cp += sprintf(cp, "syscall: %s(%d, (iov on stack), 1)\n",
sy->sy_name, fd);
return(errbuf);
}
struct status *
sy_mmrw(req, sysc, fd, addr, rw)
struct io_req *req;
struct syscall_info *sysc;
int fd;
char *addr;
int rw;
{
/*
* mmap read/write
* This version is oriented towards mmaping the file to memory
* ONCE and keeping it mapped.
*/
struct status *status;
void *mrc, *memaddr;
struct fd_cache *fdc;
struct stat sbuf;
status = (struct status *)malloc(sizeof(struct status));
if( status == NULL ){
doio_fprintf(stderr, "malloc failed, %s/%d\n",
__FILE__, __LINE__);
return NULL;
}
status->aioid = NULL;
status->rval = -1;
fdc = alloc_fdcache(req->r_data.io.r_file, req->r_data.io.r_oflags);
if( fdc->c_memaddr == NULL ) {
if( fstat(fd, &sbuf) < 0 ){
doio_fprintf(stderr, "fstat failed, errno=%d\n",
errno);
status->err = errno;
return(status);
}
fdc->c_memlen = (int)sbuf.st_size;
mrc = mmap(NULL, (int)sbuf.st_size,
rw ? PROT_WRITE|PROT_READ : PROT_READ,
MAP_SHARED, fd, 0);
if( mrc == MAP_FAILED ) {
doio_fprintf(stderr, "mmap() failed - 0x%lx %d\n",
mrc, errno);
status->err = errno;
return(status);
}
fdc->c_memaddr = mrc;
}
memaddr = (void *)((char *)fdc->c_memaddr + req->r_data.io.r_offset);
active_mmap_rw = 1;
if(rw)
memcpy(memaddr, addr, req->r_data.io.r_nbytes);
else
memcpy(addr, memaddr, req->r_data.io.r_nbytes);
active_mmap_rw = 0;
status->rval = req->r_data.io.r_nbytes;
status->err = 0;
return(status);
}
struct status *
sy_mmread(req, sysc, fd, addr)
struct io_req *req;
struct syscall_info *sysc;
int fd;
char *addr;
{
return sy_mmrw(req, sysc, fd, addr, 0);
}
struct status *
sy_mmwrite(req, sysc, fd, addr)
struct io_req *req;
struct syscall_info *sysc;
int fd;
char *addr;
{
return sy_mmrw(req, sysc, fd, addr, 1);
}
char *
fmt_mmrw(struct io_req *req, struct syscall_info *sy, int fd, char *addr)
{
static char errbuf[32768];
char *cp;
struct fd_cache *fdc;
void *memaddr;
fdc = alloc_fdcache(req->r_data.io.r_file, req->r_data.io.r_oflags);
cp = errbuf;
cp += sprintf(cp, "syscall: %s(NULL, %d, %s, MAP_SHARED, %d, 0)\n",
sy->sy_name,
fdc->c_memlen,
(sy->sy_flags & SY_WRITE) ? "PROT_WRITE" : "PROT_READ",
fd);
cp += sprintf(cp, "\tfile is mmaped to: 0x%lx\n",
(unsigned long) fdc->c_memaddr);
memaddr = (void *)((char *)fdc->c_memaddr + req->r_data.io.r_offset);
cp += sprintf(cp, "\tfile-mem=0x%lx, length=%d, buffer=0x%lx\n",
(unsigned long) memaddr, req->r_data.io.r_nbytes,
(unsigned long) addr);
return(errbuf);
}
struct syscall_info syscalls[] = {
{ "pread", PREAD,
sy_pread, NULL, fmt_pread,
0
},
{ "pwrite", PWRITE,
sy_pwrite, NULL, fmt_pread,
SY_WRITE
},
{ "readv", READV,
sy_readv, NULL, fmt_readv,
0
},
{ "writev", WRITEV,
sy_writev, NULL, fmt_readv,
SY_WRITE
},
{ "mmap-read", MMAPR,
sy_mmread, NULL, fmt_mmrw,
0
},
{ "mmap-write", MMAPW,
sy_mmwrite, NULL, fmt_mmrw,
SY_WRITE
},
{ NULL, 0,
0, 0, 0,
0
},
};
int
do_rw(req)
struct io_req *req;
{
static int pid = -1;
int fd, offset, nbytes, nstrides, nents, oflags;
int rval, mem_needed, i;
int logged_write, got_lock, woffset = 0, pattern;
int min_byte, max_byte;
char *addr, *file, *msg;
struct status *s;
struct wlog_rec wrec;
struct syscall_info *sy;
struct fd_cache *fdc;
/*
* Initialize common fields - assumes r_oflags, r_file, r_offset, and
* r_nbytes are at the same offset in the read_req and reada_req
* structures.
*/
file = req->r_data.io.r_file;
oflags = req->r_data.io.r_oflags;
offset = req->r_data.io.r_offset;
nbytes = req->r_data.io.r_nbytes;
nstrides= req->r_data.io.r_nstrides;
nents = req->r_data.io.r_nent;
pattern = req->r_data.io.r_pattern;
if( nents >= MAX_AIO ) {
doio_fprintf(stderr, "do_rw: too many list requests, %d. Maximum is %d\n",
nents, MAX_AIO);
return(-1);
}
/*
* look up system call info
*/
for(sy=syscalls; sy->sy_name != NULL && sy->sy_type != req->r_type; sy++)
;
if(sy->sy_name == NULL) {
doio_fprintf(stderr, "do_rw: unknown r_type %d.\n",
req->r_type);
return(-1);
}
/*
* Get an open file descriptor
* Note: must be done before memory allocation so that the direct i/o
* information is available in mem. allocate
*/
if ((fd = alloc_fd(file, oflags)) == -1)
return -1;
/*
* Allocate core memory and possibly sds space. Initialize the
* data to be written. Make sure we get enough, based on the
* memstride.
*
* need:
* 1 extra word for possible partial-word address "bump"
* 1 extra word for dynamic pattern overrun
* MPP_BUMP extra words for T3E non-hw-aligned memory address.
*/
if( sy->sy_buffer != NULL ) {
mem_needed = (*sy->sy_buffer)(req, 0, 0, NULL, NULL);
} else {
mem_needed = nbytes;
}
/* get memory alignment for using DIRECT I/O */
fdc = alloc_fdcache(file, oflags);
if ((rval = alloc_mem(mem_needed + wtob(1) * 2 + fdc->c_memalign)) < 0) {
return rval;
}
Pattern[0] = pattern;
/*
* Allocate SDS space for backdoor write if desired
*/
if (oflags & O_SSD) {
doio_fprintf(stderr, "Invalid O_SSD flag was generated for non-Cray system\n");
fflush(stderr);
return -1;
} else {
addr = Memptr;
/*
* if io is not raw, bump the offset by a random amount
* to generate non-word-aligned io.
*
* On MPP systems, raw I/O must start on an 0x80 byte boundary.
* For non-aligned I/O, bump the address from 1 to 8 words.
*/
if (! (req->r_data.io.r_uflags & F_WORD_ALIGNED)) {
addr += random_range(0, wtob(1) - 1, 1, NULL);
}
/*
* Force memory alignment for Direct I/O
*/
if( (oflags & O_DIRECT) && ((long)addr % fdc->c_memalign != 0) ) {
addr += fdc->c_memalign - ((long)addr % fdc->c_memalign);
}
/*
* FILL must be done on a word-aligned buffer.
* Call the fill function with Memptr which is aligned,
* then memmove it to the right place.
*/
if (sy->sy_flags & SY_WRITE) {
(*Data_Fill)(Memptr, mem_needed, Pattern, Pattern_Length, 0);
if( addr != Memptr )
memmove( addr, Memptr, mem_needed);
}
}
rval = 0;
got_lock = 0;
logged_write = 0;
/*
* Lock data if this is a write and locking option is set
*/
if (sy->sy_flags & SY_WRITE && k_opt) {
if( sy->sy_buffer != NULL ) {
(*sy->sy_buffer)(req, offset, 0, &min_byte, &max_byte);
} else {
min_byte = offset;
max_byte = offset + (nbytes * nstrides * nents);
}
if (lock_file_region(file, fd, F_WRLCK,
min_byte, (max_byte-min_byte+1)) < 0) {
doio_fprintf(stderr,
"file lock failed:\n%s\n",
fmt_ioreq(req, sy, fd));
doio_fprintf(stderr,
" buffer(req, %d, 0, 0x%x, 0x%x)\n",
offset, min_byte, max_byte);
alloc_mem(-1);
exit(E_INTERNAL);
}
got_lock = 1;
}
/*
* Write a preliminary write-log entry. This is done so that
* doio_check can do corruption detection across an interrupt/crash.
* Note that w_done is set to 0. If doio_check sees this, it
* re-creates the file extents as if the write completed, but does not
* do any checking - see comments in doio_check for more details.
*/
if (sy->sy_flags & SY_WRITE && w_opt) {
if (pid == -1) {
pid = getpid();
}
wrec.w_async = (sy->sy_flags & SY_ASYNC) ? 1 : 0;
wrec.w_oflags = oflags;
wrec.w_pid = pid;
wrec.w_offset = offset;
wrec.w_nbytes = nbytes; /* mem_needed -- total length */
wrec.w_pathlen = strlen(file);
memcpy(wrec.w_path, file, wrec.w_pathlen);
wrec.w_hostlen = strlen(Host);
memcpy(wrec.w_host, Host, wrec.w_hostlen);
wrec.w_patternlen = Pattern_Length;
memcpy(wrec.w_pattern, Pattern, wrec.w_patternlen);
wrec.w_done = 0;
if ((woffset = wlog_record_write(&Wlog, &wrec, -1)) == -1) {
doio_fprintf(stderr,
"Could not append to write-log: %s (%d)\n",
SYSERR, errno);
} else {
logged_write = 1;
}
}
s = (*sy->sy_syscall)(req, sy, fd, addr);
if( s->rval == -1 ) {
doio_fprintf(stderr,
"%s() request failed: %s (%d)\n%s\n%s\n",
sy->sy_name, SYSERR, errno,
fmt_ioreq(req, sy, fd),
(*sy->sy_format)(req, sy, fd, addr));
doio_upanic(U_RVAL);
for(i=0; i < nents; i++) {
if(s->aioid == NULL)
break;
aio_unregister(s->aioid[i]);
}
rval = -1;
} else {
/*
* If the syscall was async, wait for I/O to complete
*/
#ifndef linux
if(sy->sy_flags & SY_ASYNC) {
for(i=0; i < nents; i++) {
aio_wait(s->aioid[i]);
}
}
#endif
/*
* Check the syscall how-much-data-written return. Look
* for this in either the return value or the 'iosw'
* structure.
*/
if( !(sy->sy_flags & SY_IOSW) ) {
if(s->rval != mem_needed) {
doio_fprintf(stderr,
"%s() request returned wrong # of bytes - expected %d, got %d\n%s\n%s\n",
sy->sy_name, nbytes, s->rval,
fmt_ioreq(req, sy, fd),
(*sy->sy_format)(req, sy, fd, addr));
rval = -1;
doio_upanic(U_RVAL);
}
}
}
/*
* Verify that the data was written correctly - check_file() returns
* a non-null pointer which contains an error message if there are
* problems.
*/
if ( rval == 0 && sy->sy_flags & SY_WRITE && v_opt) {
msg = check_file(file, offset, nbytes*nstrides*nents,
Pattern, Pattern_Length, 0,
oflags & O_PARALLEL);
if (msg != NULL) {
doio_fprintf(stderr, "%s\n%s\n%s\n",
msg,
fmt_ioreq(req, sy, fd),
(*sy->sy_format)(req, sy, fd, addr));
doio_upanic(U_CORRUPTION);
exit(E_COMPARE);
}
}
/*
* General cleanup ...
*
* Write extent information to the write-log, so that doio_check can do
* corruption detection. Note that w_done is set to 1, indicating that
* the write has been verified as complete. We don't need to write the
* filename on the second logging.
*/
if (w_opt && logged_write) {
wrec.w_done = 1;
wlog_record_write(&Wlog, &wrec, woffset);
}
/*
* Unlock file region if necessary
*/
if (got_lock) {
if (lock_file_region(file, fd, F_UNLCK,
min_byte, (max_byte-min_byte+1)) < 0) {
alloc_mem(-1);
exit(E_INTERNAL);
}
}
if(s->aioid != NULL)
free(s->aioid);
free(s);
return (rval == -1) ? -1 : 0;
}
/*
* xfsctl-based requests
* - XFS_IOC_RESVSP
* - XFS_IOC_UNRESVSP
*/
int
do_xfsctl(req)
struct io_req *req;
{
int fd, oflags, offset, nbytes;
int rval, op = 0;
int got_lock;
int min_byte = 0, max_byte = 0;
char *file, *msg = NULL;
struct xfs_flock64 flk;
/*
* Initialize common fields - assumes r_oflags, r_file, r_offset, and
* r_nbytes are at the same offset in the read_req and reada_req
* structures.
*/
file = req->r_data.io.r_file;
oflags = req->r_data.io.r_oflags;
offset = req->r_data.io.r_offset;
nbytes = req->r_data.io.r_nbytes;
flk.l_type=0;
flk.l_whence=SEEK_SET;
flk.l_start=offset;
flk.l_len=nbytes;
/*
* Get an open file descriptor
*/
if ((fd = alloc_fd(file, oflags)) == -1)
return -1;
rval = 0;
got_lock = 0;
/*
* Lock data if this is locking option is set
*/
if (k_opt) {
min_byte = offset;
max_byte = offset + nbytes;
if (lock_file_region(file, fd, F_WRLCK,
min_byte, (nbytes+1)) < 0) {
doio_fprintf(stderr,
"file lock failed:\n");
doio_fprintf(stderr,
" buffer(req, %d, 0, 0x%x, 0x%x)\n",
offset, min_byte, max_byte);
alloc_mem(-1);
exit(E_INTERNAL);
}
got_lock = 1;
}
switch (req->r_type) {
case RESVSP: op=XFS_IOC_RESVSP; msg="resvsp"; break;
case UNRESVSP: op=XFS_IOC_UNRESVSP; msg="unresvsp"; break;
}
rval = xfsctl(file, fd, op, &flk);
if( rval == -1 ) {
doio_fprintf(stderr,
"xfsctl %s request failed: %s (%d)\n\txfsctl(%d, %s %d, {%d %lld ==> %lld}\n",
msg, SYSERR, errno,
fd, msg, op, flk.l_whence,
(long long)flk.l_start,
(long long)flk.l_len);
doio_upanic(U_RVAL);
rval = -1;
}
/*
* Unlock file region if necessary
*/
if (got_lock) {
if (lock_file_region(file, fd, F_UNLCK,
min_byte, (max_byte-min_byte+1)) < 0) {
alloc_mem(-1);
exit(E_INTERNAL);
}
}
return (rval == -1) ? -1 : 0;
}
/*
* fsync(2) and fdatasync(2)
*/
int
do_sync(req)
struct io_req *req;
{
int fd, oflags;
int rval;
char *file;
/*
* Initialize common fields - assumes r_oflags, r_file, r_offset, and
* r_nbytes are at the same offset in the read_req and reada_req
* structures.
*/
file = req->r_data.io.r_file;
oflags = req->r_data.io.r_oflags;
/*
* Get an open file descriptor
*/
if ((fd = alloc_fd(file, oflags)) == -1)
return -1;
rval = 0;
switch(req->r_type) {
case FSYNC2:
rval = fsync(fd);
break;
case FDATASYNC:
rval = fdatasync(fd);
break;
default:
rval = -1;
}
return (rval == -1) ? -1 : 0;
}
int
doio_pat_fill(char *addr, int mem_needed, char *Pattern, int Pattern_Length,
int shift)
{
return pattern_fill(addr, mem_needed, Pattern, Pattern_Length, 0);
}
char *
doio_pat_check(buf, offset, length, pattern, pattern_length, patshift)
char *buf;
int offset;
int length;
char *pattern;
int pattern_length;
int patshift;
{
static char errbuf[4096];
int nb, i, pattern_index;
char *cp, *bufend, *ep;
char actual[33], expected[33];
if (pattern_check(buf, length, pattern, pattern_length, patshift) != 0) {
ep = errbuf;
ep += sprintf(ep, "Corrupt regions follow - unprintable chars are represented as '.'\n");
ep += sprintf(ep, "-----------------------------------------------------------------\n");
pattern_index = patshift % pattern_length;;
cp = buf;
bufend = buf + length;
while (cp < bufend) {
if (*cp != pattern[pattern_index]) {
nb = bufend - cp;
if (nb > sizeof(expected)-1) {
nb = sizeof(expected)-1;
}
ep += sprintf(ep, "corrupt bytes starting at file offset %d\n", offset + (int)(cp-buf));
/*
* Fill in the expected and actual patterns
*/
bzero(expected, sizeof(expected));
bzero(actual, sizeof(actual));
for (i = 0; i < nb; i++) {
expected[i] = pattern[(pattern_index + i) % pattern_length];
if (! isprint((int)expected[i])) {
expected[i] = '.';
}
actual[i] = cp[i];
if (! isprint((int)actual[i])) {
actual[i] = '.';
}
}
ep += sprintf(ep, " 1st %2d expected bytes: %s\n", nb, expected);
ep += sprintf(ep, " 1st %2d actual bytes: %s\n", nb, actual);
fflush(stderr);
return errbuf;
} else {
cp++;
pattern_index++;
if (pattern_index == pattern_length) {
pattern_index = 0;
}
}
}
return errbuf;
}
return(NULL);
}
/*
* Check the contents of a file beginning at offset, for length bytes. It
* is assumed that there is a string of pattern bytes in this area of the
* file. Use normal buffered reads to do the verification.
*
* If there is a data mismatch, write a detailed message into a static buffer
* suitable for the caller to print. Otherwise print NULL.
*
* The fsa flag is set to non-zero if the buffer should be read back through
* the FSA (unicos/mk). This implies the file will be opened
* O_PARALLEL|O_RAW|O_WELLFORMED to do the validation. We must do this because
* FSA will not allow the file to be opened for buffered io if it was
* previously opened for O_PARALLEL io.
*/
char *
check_file(file, offset, length, pattern, pattern_length, patshift, fsa)
char *file;
int offset;
int length;
char *pattern;
int pattern_length;
int patshift;
int fsa;
{
static char errbuf[4096];
int fd, nb, flags;
char *buf, *em, *ep;
struct fd_cache *fdc;
buf = Memptr;
if (V_opt) {
flags = Validation_Flags | O_RDONLY;
} else {
flags = O_RDONLY;
}
if ((fd = alloc_fd(file, flags)) == -1) {
sprintf(errbuf,
"Could not open file %s with flags %#o (%s) for data comparison: %s (%d)\n",
file, flags, format_oflags(flags),
SYSERR, errno);
return errbuf;
}
if (lseek(fd, offset, SEEK_SET) == -1) {
sprintf(errbuf,
"Could not lseek to offset %d in %s for verification: %s (%d)\n",
offset, file, SYSERR, errno);
return errbuf;
}
/* Guarantee a properly aligned address on Direct I/O */
fdc = alloc_fdcache(file, flags);
if( (flags & O_DIRECT) && ((long)buf % fdc->c_memalign != 0) ) {
buf += fdc->c_memalign - ((long)buf % fdc->c_memalign);
}
if ((nb = read(fd, buf, length)) == -1) {
sprintf(errbuf,
"Could not read %d bytes from %s for verification: %s (%d)\n\tread(%d, 0x%p, %d)\n\tbuf %% alignment(%d) = %ld\n",
length, file, SYSERR, errno,
fd, buf, length,
fdc->c_memalign, (long)buf % fdc->c_memalign);
return errbuf;
}
if (nb != length) {
sprintf(errbuf,
"Read wrong # bytes from %s. Expected %d, got %d\n",
file, length, nb);
return errbuf;
}
if( (em = (*Data_Check)(buf, offset, length, pattern, pattern_length, patshift)) != NULL ) {
ep = errbuf;
ep += sprintf(ep, "*** DATA COMPARISON ERROR ***\n");
ep += sprintf(ep, "check_file(%s, %d, %d, %s, %d, %d) failed\n\n",
file, offset, length, pattern, pattern_length, patshift);
ep += sprintf(ep, "Comparison fd is %d, with open flags %#o\n",
fd, flags);
strcpy(ep, em);
return(errbuf);
}
return NULL;
}
/*
* Function to single-thread stdio output.
*/
int
doio_fprintf(FILE *stream, char *format, ...)
{
static int pid = -1;
char *date;
int rval;
struct flock flk;
va_list arglist;
date = hms(time(0));
if (pid == -1) {
pid = getpid();
}
flk.l_whence = flk.l_start = flk.l_len = 0;
flk.l_type = F_WRLCK;
fcntl(fileno(stream), F_SETLKW, &flk);
va_start(arglist, format);
rval = fprintf(stream, "\n%s%s (%5d) %s\n", Prog, TagName, pid, date);
rval += fprintf(stream, "---------------------\n");
vfprintf(stream, format, arglist);
va_end(arglist);
fflush(stream);
flk.l_type = F_UNLCK;
fcntl(fileno(stream), F_SETLKW, &flk);
return rval;
}
/*
* Simple function for allocating core memory. Uses Memsize and Memptr to
* keep track of the current amount allocated.
*/
int
alloc_mem(nbytes)
int nbytes;
{
char *cp;
void *addr;
int me = 0, flags, key, shmid;
static int mturn = 0; /* which memory type to use */
struct memalloc *M;
char filename[255];
#ifdef linux
struct shmid_ds shm_ds;
bzero( &shm_ds, sizeof(struct shmid_ds) );
#endif
/* nbytes = -1 means "free all allocated memory" */
if( nbytes == -1 ) {
for(me=0; me < Nmemalloc; me++) {
if(Memalloc[me].space == NULL)
continue;
switch(Memalloc[me].memtype) {
case MEM_DATA:
free(Memalloc[me].space);
Memalloc[me].space = NULL;
Memptr = NULL;
Memsize = 0;
break;
case MEM_SHMEM:
shmdt(Memalloc[me].space);
Memalloc[me].space = NULL;
shmctl(Memalloc[me].fd, IPC_RMID, &shm_ds);
break;
case MEM_MMAP:
munmap(Memalloc[me].space,
Memalloc[me].size);
close(Memalloc[me].fd);
if(Memalloc[me].flags & MEMF_FILE) {
unlink(Memalloc[me].name);
}
Memalloc[me].space = NULL;
break;
default:
doio_fprintf(stderr, "alloc_mem: HELP! Unknown memory space type %d index %d\n",
Memalloc[me].memtype, me);
break;
}
}
return 0;
}
/*
* Select a memory area (currently round-robbin)
*/
if(mturn >= Nmemalloc)
mturn=0;
M = &Memalloc[mturn];
switch(M->memtype) {
case MEM_DATA:
if( nbytes > M->size ) {
if( M->space != NULL ){
free(M->space);
}
M->space = NULL;
M->size = 0;
}
if( M->space == NULL ) {
if( (cp = malloc( nbytes )) == NULL ) {
doio_fprintf(stderr, "malloc(%d) failed: %s (%d)\n",
nbytes, SYSERR, errno);
return -1;
}
M->space = (void *)cp;
M->size = nbytes;
}
break;
case MEM_MMAP:
if( nbytes > M->size ) {
if( M->space != NULL ) {
munmap(M->space, M->size);
close(M->fd);
if( M->flags & MEMF_FILE )
unlink( M->name );
}
M->space = NULL;
M->size = 0;
}
if( M->space == NULL ) {
if(strchr(M->name, '%')) {
sprintf(filename, M->name, getpid());
M->name = strdup(filename);
}
if( (M->fd = open(M->name, O_CREAT|O_RDWR, 0666)) == -1) {
doio_fprintf(stderr, "alloc_mmap: error %d (%s) opening '%s'\n",
errno, SYSERR,
M->name);
return(-1);
}
addr = NULL;
flags = 0;
M->size = nbytes * 4;
/* bias addr if MEMF_ADDR | MEMF_FIXADDR */
/* >>> how to pick a memory address? */
/* bias flags on MEMF_PRIVATE etc */
if(M->flags & MEMF_PRIVATE)
flags |= MAP_PRIVATE;
if(M->flags & MEMF_SHARED)
flags |= MAP_SHARED;
/*printf("alloc_mem, about to mmap, fd=%d, name=(%s)\n", M->fd, M->name);*/
if( (M->space = mmap(addr, M->size,
PROT_READ|PROT_WRITE,
flags, M->fd, 0))
== MAP_FAILED) {
doio_fprintf(stderr, "alloc_mem: mmap error. errno %d (%s)\n\tmmap(addr 0x%x, size %d, read|write 0x%x, mmap flags 0x%x [%#o], fd %d, 0)\n\tfile %s\n",
errno, SYSERR,
addr, M->size,
PROT_READ|PROT_WRITE,
flags, M->flags, M->fd,
M->name);
doio_fprintf(stderr, "\t%s%s%s%s%s",
(flags & MAP_PRIVATE) ? "private " : "",
(flags & MAP_SHARED) ? "shared" : "");
return(-1);
}
}
break;
case MEM_SHMEM:
if( nbytes > M->size ) {
if( M->space != NULL ) {
shmctl( M->fd, IPC_RMID, &shm_ds );
}
M->space = NULL;
M->size = 0;
}
if(M->space == NULL) {
if(!strcmp(M->name, "private")) {
key = IPC_PRIVATE;
} else {
sscanf(M->name, "%i", &key);
}
M->size = M->nblks ? M->nblks * 512 : nbytes;
if( nbytes > M->size ){
#ifdef DEBUG
doio_fprintf(stderr, "MEM_SHMEM: nblks(%d) too small: nbytes=%d Msize=%d, skipping this req.\n",
M->nblks, nbytes, M->size );
#endif
return SKIP_REQ;
}
shmid = shmget(key, M->size, IPC_CREAT|0666);
if( shmid == -1 ) {
doio_fprintf(stderr, "shmget(0x%x, %d, CREAT) failed: %s (%d)\n",
key, M->size, SYSERR, errno);
return(-1);
}
M->fd = shmid;
M->space = shmat(shmid, NULL, SHM_RND);
if( M->space == (void *)-1 ) {
doio_fprintf(stderr, "shmat(0x%x, NULL, SHM_RND) failed: %s (%d)\n",
shmid, SYSERR, errno);
return(-1);
}
}
break;
default:
doio_fprintf(stderr, "alloc_mem: HELP! Unknown memory space type %d index %d\n",
Memalloc[me].memtype, mturn);
break;
}
Memptr = M->space;
Memsize = M->size;
mturn++;
return 0;
}
/*
* Function to maintain a file descriptor cache, so that doio does not have
* to do so many open() and close() calls. Descriptors are stored in the
* cache by file name, and open flags. Each entry also has a _rtc value
* associated with it which is used in aging. If doio cannot open a file
* because it already has too many open (ie. system limit hit) it will close
* the one in the cache that has the oldest _rtc value.
*
* If alloc_fd() is called with a file of NULL, it will close all descriptors
* in the cache, and free the memory in the cache.
*/
int
alloc_fd(file, oflags)
char *file;
int oflags;
{
struct fd_cache *fdc;
struct fd_cache *alloc_fdcache(char *file, int oflags);
fdc = alloc_fdcache(file, oflags);
if(fdc != NULL)
return(fdc->c_fd);
else
return(-1);
}
struct fd_cache *
alloc_fdcache(file, oflags)
char *file;
int oflags;
{
int fd;
struct fd_cache *free_slot, *oldest_slot, *cp;
static int cache_size = 0;
static struct fd_cache *cache = NULL;
struct dioattr finfo;
/*
* If file is NULL, it means to free up the fd cache.
*/
if (file == NULL && cache != NULL) {
for (cp = cache; cp < &cache[cache_size]; cp++) {
if (cp->c_fd != -1) {
close(cp->c_fd);
}
if (cp->c_memaddr != NULL) {
munmap(cp->c_memaddr, cp->c_memlen);
}
}
free(cache);
cache = NULL;
cache_size = 0;
return 0;
}
free_slot = NULL;
oldest_slot = NULL;
/*
* Look for a fd in the cache. If one is found, return it directly.
* Otherwise, when this loop exits, oldest_slot will point to the
* oldest fd slot in the cache, and free_slot will point to an
* unoccupied slot if there are any.
*/
for (cp = cache; cp != NULL && cp < &cache[cache_size]; cp++) {
if (cp->c_fd != -1 &&
cp->c_oflags == oflags &&
strcmp(cp->c_file, file) == 0) {
cp->c_rtc = Reqno;
return cp;
}
if (cp->c_fd == -1) {
if (free_slot == NULL) {
free_slot = cp;
}
} else {
if (oldest_slot == NULL ||
cp->c_rtc < oldest_slot->c_rtc) {
oldest_slot = cp;
}
}
}
/*
* No matching file/oflags pair was found in the cache. Attempt to
* open a new fd.
*/
if ((fd = open(file, oflags, 0666)) < 0) {
if (errno != EMFILE) {
doio_fprintf(stderr,
"Could not open file %s with flags %#o (%s): %s (%d)\n",
file, oflags, format_oflags(oflags),
SYSERR, errno);
alloc_mem(-1);
exit(E_SETUP);
}
/*
* If we get here, we have as many open fd's as we can have.
* Close the oldest one in the cache (pointed to by
* oldest_slot), and attempt to re-open.
*/
close(oldest_slot->c_fd);
oldest_slot->c_fd = -1;
free_slot = oldest_slot;
if ((fd = open(file, oflags, 0666)) < 0) {
doio_fprintf(stderr,
"Could not open file %s with flags %#o (%s): %s (%d)\n",
file, oflags, format_oflags(oflags),
SYSERR, errno);
alloc_mem(-1);
exit(E_SETUP);
}
}
/*printf("alloc_fd: new file %s flags %#o fd %d\n", file, oflags, fd);*/
/*
* If we get here, fd is our open descriptor. If free_slot is NULL,
* we need to grow the cache, otherwise free_slot is the slot that
* should hold the fd info.
*/
if (free_slot == NULL) {
cache = (struct fd_cache *)realloc(cache, sizeof(struct fd_cache) * (FD_ALLOC_INCR + cache_size));
if (cache == NULL) {
doio_fprintf(stderr, "Could not malloc() space for fd chace");
alloc_mem(-1);
exit(E_SETUP);
}
cache_size += FD_ALLOC_INCR;
for (cp = &cache[cache_size-FD_ALLOC_INCR];
cp < &cache[cache_size]; cp++) {
cp->c_fd = -1;
}
free_slot = &cache[cache_size - FD_ALLOC_INCR];
}
/*
* finally, fill in the cache slot info
*/
free_slot->c_fd = fd;
free_slot->c_oflags = oflags;
strcpy(free_slot->c_file, file);
free_slot->c_rtc = Reqno;
if (oflags & O_DIRECT) {
char *dio_env;
if (xfsctl(file, fd, XFS_IOC_DIOINFO, &finfo) == -1) {
finfo.d_mem = 1;
finfo.d_miniosz = 1;
finfo.d_maxiosz = 1;
}
dio_env = getenv("XFS_DIO_MIN");
if (dio_env)
finfo.d_mem = finfo.d_miniosz = atoi(dio_env);
} else {
finfo.d_mem = 1;
finfo.d_miniosz = 1;
finfo.d_maxiosz = 1;
}
free_slot->c_memalign = finfo.d_mem;
free_slot->c_miniosz = finfo.d_miniosz;
free_slot->c_maxiosz = finfo.d_maxiosz;
free_slot->c_memaddr = NULL;
free_slot->c_memlen = 0;
return free_slot;
}
/*
*
* Signal Handling Section
*
*
*/
void
cleanup_handler()
{
havesigint=1; /* in case there's a followup signal */
alloc_mem(-1);
exit(0);
}
void
die_handler(sig)
int sig;
{
doio_fprintf(stderr, "terminating on signal %d\n", sig);
alloc_mem(-1);
exit(1);
}
void
sigbus_handler(sig)
int sig;
{
/* See sigbus_handler() in the 'ifdef sgi' case for details. Here,
we don't have the siginfo stuff so the guess is weaker but we'll
do it anyway.