/*\ Delete File
\*/
int elio_delete(const char* filename)
{
int rc;
if (access(filename, F_OK) != 0) /* Succeed if the file does not exist */
return ELIO_OK;
#ifdef PABLO
int pablo_code = PABLO_elio_delete;
PABLO_start( pablo_code );
#endif
rc = unlink(filename);
/* Remeber the first rc ... now delete possible extents until
one fails */
{
int extent;
for (extent=1; extent<MAX_EXTENT; extent++) {
char fname[ELIO_FILENAME_MAX];
sprintf(fname,"%sx%3.3d",filename,extent);
/*printf("Deleting extent %d with name '%s'\n",extent,fname);*/
if (unlink(fname)) break;
}
}
if(rc ==-1) ELIO_ERROR(DELFAIL,0);
#ifdef PABLO
PABLO_end(pablo_code);
#endif
return(ELIO_OK);
}
/*\ Close File
\*/
int elio_fsync(Fd_t fd)
{
int status = ELIO_OK;
#ifdef ELIO_FSYNC
if (fd->next)
status = elio_fsync((Fd_t) fd->next);
printf("syncing extent %d name %s\n", fd->extent, fd->name);
/* if(ELIO_FSYNC(fd->fd)==-1 || (status != ELIO_OK)) */
#ifndef WIN32
#if !defined(__INTERIX)
#ifdef CATAMOUNT
status = fsync((Fd_t) fd->next);
#else
sync();
#endif
#endif
#endif
if(ELIO_FSYNC(fd->fd)==-1 )
ELIO_ERROR(FSYNCFAIL, 0);
#endif
return ELIO_OK;
}
/*\ Check if asynchronous I/O operation completed. If yes, invalidate id.
\*/
int elio_probe(io_request_t *req_id, int* status)
{
int errval=-1;
int aio_i = 0;
#ifdef PABLO
int pablo_code = PABLO_elio_probe;
PABLO_start( pablo_code );
#endif
if(*req_id == ELIO_DONE){
*status = ELIO_DONE;
} else {
#ifdef AIO
# if defined(CRAY)
# if defined(FFIO)
{
struct ffsw dumstat, *prdstat=&(cb_fout[*req_id].stat);
fffcntl(cb_fout[*req_id].filedes, FC_ASPOLL, prdstat, &dumstat);
errval = (FFSTAT(*prdstat) == 0) ? INPROGRESS: 0;
}
# else
errval = ( IO_DONE(cb_fout[*req_id].stat) == 0)? INPROGRESS: 0;
# endif
# elif defined(AIX)
errval = aio_error(cb_fout[(int)*req_id].aio_handle);
# else
errval = aio_error(cb_fout+(int)*req_id);
# endif
#endif
switch (errval) {
case 0:
while(aio_req[aio_i] != *req_id && aio_i < MAX_AIO_REQ) aio_i++;
if(aio_i >= MAX_AIO_REQ) ELIO_ERROR(HANDFAIL, aio_i);
*req_id = ELIO_DONE;
*status = ELIO_DONE;
aio_req[aio_i] = NULL_AIO;
break;
case INPROGRESS:
*status = ELIO_PENDING;
break;
default:
return PROBFAIL;
}
}
#ifdef PABLO
PABLO_end(pablo_code);
#endif
return ELIO_OK;
}
/**
* determines directory path for a given file
*/
int elio_dirname(const char *fname, char *dirname, int len)
{
size_t flen = strlen(fname);
if(len<=((int)flen))
ELIO_ERROR(LONGFAIL,flen);
#ifdef WIN32
while(fname[flen] != '/' && fname[flen] != '\\' && flen >0 ) flen--;
#else
while(fname[flen] != '/' && flen >0 ) flen--;
#endif
if(flen==0)strcpy(dirname,".");
else {strncpy(dirname, fname, flen); dirname[flen]=(char)0;}
return(ELIO_OK);
}
/*\ Close File
\*/
int elio_close(Fd_t fd)
{
int status = ELIO_OK;
#ifdef PABLO
pablo_code = PABLO_elio_close;
PABLO_start( pablo_code );
#endif
if (fd->next)
status = elio_close((Fd_t) fd->next);
/*printf("Closing extent %d name %s\n", fd->extent, fd->name);*/
if(CLOSE(fd->fd)==-1 || (status != ELIO_OK))
ELIO_ERROR(CLOSFAIL, 0);
free(fd->name);
free(fd);
#ifdef PABLO
PABLO_end(pablo_code);
#endif
return ELIO_OK;
}
/*\ Wait for asynchronous I/O operation to complete. Invalidate id.
\*/
int elio_wait(io_request_t *req_id)
{
int aio_i=0;
int rc;
rc=0; /* just to remove the compiler warning */
#ifdef PABLO
int pablo_code = PABLO_elio_wait;
PABLO_start( pablo_code );
#endif
if(*req_id != ELIO_DONE ) {
# ifdef AIO
# if defined(CRAY)
# if defined(FFIO)
{
struct ffsw dumstat, *prdstat=&(cb_fout[*req_id].stat);
fffcntl(cb_fout[*req_id].filedes, FC_RECALL, prdstat, &dumstat);
if (FFSTAT(*prdstat) == FFERR) ELIO_ERROR(SUSPFAIL,0);
}
# else
{
struct iosw *statlist[1];
statlist[0] = &(cb_fout[*req_id].stat);
recall(cb_fout[*req_id].filedes, 1, statlist);
}
# endif
# elif defined(AIX)
# if !defined(AIX52) && !defined(_AIO_AIX_SOURCE)
do { /* I/O can be interrupted on SP through rcvncall ! */
rc =(int)aio_suspend(1, cb_fout_arr+(int)*req_id);
} while(rc == -1 && errno == EINTR);
# endif
# else
if((int)aio_suspend((const struct aiocb *const*)(cb_fout_arr+(int)*req_id), 1, NULL) != 0) rc =-1;
# endif
if(rc ==-1) ELIO_ERROR(SUSPFAIL,0);
# if defined(DECOSF)
/* on DEC aio_return is required to clean internal data structures */
if(aio_return(cb_fout+(int)*req_id) == -1) ELIO_ERROR(RETUFAIL,0);
# endif
#endif
while(aio_req[aio_i] != *req_id && aio_i < MAX_AIO_REQ) aio_i++;
if(aio_i >= MAX_AIO_REQ) ELIO_ERROR(HANDFAIL, aio_i);
aio_req[aio_i] = NULL_AIO;
*req_id = ELIO_DONE;
}
#ifdef PABLO
PABLO_end(pablo_code);
#endif
return ELIO_OK;
}
/*\ Asynchronous Read: returns 0 if succeded or -1 if failed
\*/
int elio_aread(Fd_t fd, Off_t doffset, void* buf, Size_t bytes, io_request_t * req_id)
{
off_t offset = (off_t) doffset;
Size_t stat;
#ifdef AIO
int aio_i;
#endif
#ifdef CRAY
int rc;
#endif
if (doffset >= ABSURDLY_LARGE)
ELIO_ERROR(SEEKFAIL,0);
/* Follow the linked list of extents down until we hit the file
that contains the offset */
if (doffset >= elio_max_file_size(fd)) {
Fd_t next_fd = elio_get_next_extent(fd);
if (!next_fd) ELIO_ERROR(OPENFAIL,0);
doffset -= elio_max_file_size(fd);
return elio_aread(next_fd, doffset, buf, bytes, req_id);
}
/* Figure out if the read continues onto the next extent
* ... if so then force the entire request to be done synchronously
* so that we don't have to manage multiple async requests */
if ((doffset+((Off_t) bytes)) >= elio_max_file_size(fd)) {
*req_id = ELIO_DONE;
if (elio_read(fd, doffset, buf, bytes) != bytes)
return -1;
else
return 0;
}
offset = (off_t) doffset;
#ifdef PABLO
int pablo_code = PABLO_elio_aread;
PABLO_start( pablo_code );
#endif
*req_id = ELIO_DONE;
#ifdef AIO
AIO_LOOKUP(aio_i);
/* blocking io when request table is full */
if(aio_i >= MAX_AIO_REQ){
# if defined(DEBUG)
fprintf(stderr, "elio_read: Warning- asynch overflow\n");
# endif
SYNC_EMULATE(read);
} else {
*req_id = (io_request_t) aio_i;
if((stat=elio_set_cb(fd, offset, aio_i, (void*) buf, bytes)))
ELIO_ERROR((int)stat,0);
# if defined(CRAY)
rc = READA(fd->fd, buf, bytes, &cb_fout[aio_i].stat, DEFARG);
stat = (rc < 0)? -1 : 0;
# elif defined(AIX)
#if !defined(AIX52) && !defined(_AIO_AIX_SOURCE)
stat = aio_read(fd->fd, cb_fout+aio_i);
#endif
# else
stat = aio_read(cb_fout+aio_i);
# endif
aio_req[aio_i] = *req_id;
}
#else
/* call blocking write when AIO not available */
SYNC_EMULATE(read);
#endif
if(stat ==-1) ELIO_ERROR(AWRITFAIL, 0);
#ifdef PABLO
PABLO_end(pablo_code);
#endif
return((int)stat);
}
/*\ Blocking Read
* - returns number of bytes read or error code (<0) if failed
\*/
Size_t elio_read(Fd_t fd, Off_t doffset, void* buf, Size_t bytes)
{
off_t offset;
Size_t stat, bytes_to_read = bytes;
Size_t nextbytes;
int attempt=0;
if (doffset >= ABSURDLY_LARGE)
ELIO_ERROR(SEEKFAIL,0);
/* Follow the linked list of extents down until we hit the file
that contains the offset */
if (doffset >= elio_max_file_size(fd)) {
Fd_t next_fd = elio_get_next_extent(fd);
if (!next_fd) ELIO_ERROR(OPENFAIL,0);
doffset -= elio_max_file_size(fd);
return elio_read(next_fd, doffset, buf, bytes);
}
/* Figure out if the read continues onto the next extent */
offset = (off_t) doffset;
nextbytes = 0;
if ((doffset+bytes_to_read) >= elio_max_file_size(fd)) {
nextbytes = bytes_to_read;
bytes_to_read = (Size_t) (elio_max_file_size(fd)-doffset);
nextbytes -= bytes_to_read;
}
/* Read from this physical file */
#ifdef PABLO
int pablo_code = PABLO_elio_read;
PABLO_start( pablo_code );
#endif
if(offset != SEEK(fd->fd,offset,SEEK_SET)) ELIO_ERROR(SEEKFAIL,0);
while (bytes_to_read) {
stat = READ(fd->fd, buf, bytes_to_read);
if(stat==0){
ELIO_ERROR(EOFFAIL, stat);
} else if ((stat == -1) && ((errno == EINTR) || (errno == EAGAIN))) {
; /* interrupted read should be restarted */
} else if (stat > 0) {
bytes_to_read -= stat;
buf = stat + (char*)buf; /*advance pointer by # bytes read*/
} else {
ELIO_ERROR(READFAIL, stat);
}
attempt++;
}
/* Only get here if all went OK */
#ifdef PABLO
PABLO_end(pablo_code);
#endif
/* Read from next extent(s) ... relies on incrementing of buf */
if (nextbytes) {
Fd_t next_fd = elio_get_next_extent(fd);
if (!next_fd) ELIO_ERROR(OPENFAIL,0);
stat = elio_read(next_fd, (Off_t) 0, buf, nextbytes);
if (stat != nextbytes)
ELIO_ERROR(READFAIL, stat);
}
return bytes;
}
/*\ Blocking Write
* - returns number of bytes written or error code (<0) if failed
\*/
Size_t elio_write(Fd_t fd, Off_t doffset, const void* buf, Size_t bytes)
{
off_t offset;
Size_t stat, bytes_to_write = bytes;
Size_t nextbytes;
if (doffset >= ABSURDLY_LARGE)
ELIO_ERROR(SEEKFAIL,0);
/* Follow the linked list of extents down until we hit the file
that contains the offset */
if (doffset >= elio_max_file_size(fd)) {
Fd_t next_fd = elio_get_next_extent(fd);
if (!next_fd) ELIO_ERROR(OPENFAIL,0);
doffset -= elio_max_file_size(fd);
return elio_write(next_fd, doffset, buf, bytes);
}
/* Figure out if the write continues onto the next extent */
offset = (off_t) doffset;
nextbytes = 0;
if ((doffset+bytes_to_write) >= elio_max_file_size(fd)) {
nextbytes = bytes_to_write;
bytes_to_write = (Size_t) (elio_max_file_size(fd)-doffset);
nextbytes -= bytes_to_write;
}
/*printf("TRYING TO WRITE AT doffset=%f offset=%lu bw=%lu nb=%lu\n", doffset, offset,
bytes_to_write, nextbytes);*/
/* Write to this extent */
#ifdef PABLO
int pablo_code = PABLO_elio_write;
PABLO_start( pablo_code );
#endif
if(offset != SEEK(fd->fd,offset,SEEK_SET)) ELIO_ERROR(SEEKFAIL,0);
while (bytes_to_write) {
stat = WRITE(fd->fd, buf, bytes_to_write);
if ((stat == -1) && ((errno == EINTR) || (errno == EAGAIN))) {
; /* interrupted write should be restarted */
} else if (stat > 0) {
bytes_to_write -= stat;
buf = stat + (char*)buf; /*advance pointer by # bytes written*/
} else {
ELIO_ERROR(WRITFAIL, stat);
}
}
/* Only get here if all has gone OK */
#ifdef PABLO
PABLO_end(pablo_code);
#endif
/* Write to next extent(s) ... relies on incrementing of buf */
if (nextbytes) {
Fd_t next_fd = elio_get_next_extent(fd);
if (!next_fd) ELIO_ERROR(OPENFAIL,0);
stat = elio_write(next_fd, (Off_t) 0, buf, nextbytes);
if (stat != nextbytes)
ELIO_ERROR(WRITFAIL, stat);
}
return bytes;
}
/**
* Stat a file (or path) to determine it's filesystem info
*/
int elio_stat(char *fname, stat_t *statinfo)
{
struct stat ufs_stat;
int bsize;
struct STATVFS ufs_statfs;
PABLO_start(PABLO_elio_stat);
if(stat(fname, &ufs_stat) != 0)
ELIO_ERROR(STATFAIL, 1);
# if defined(PIOFS)
/* fprintf(stderr,"filesystem %d\n",ufs_stat.st_vfstype);*/
/* according to /etc/vfs, "9" means piofs */
if(ufs_stat.st_vfstype == 9) statinfo->fs = ELIO_PIOFS;
else
# endif
statinfo->fs = ELIO_UFS;
/* only regular or directory files are OK */
if(!S_ISREG(ufs_stat.st_mode) && !S_ISDIR(ufs_stat.st_mode))
ELIO_ERROR(TYPEFAIL, 1);
# if defined(CRAY)
if(statfs(fname, &ufs_statfs, sizeof(ufs_statfs), 0) != 0)
# else
if(STATVFS(fname, &ufs_statfs) != 0)
# endif
ELIO_ERROR(STATFAIL,1);
# if defined(WIN32)
get_avail_space(ufs_statfs.st_dev, &(statinfo->avail), &bsize);
# else
/* get number of available blocks */
# if defined(CRAY) || defined(NEC)
/* f_bfree == f_bavail -- naming changes */
# ifdef CRAY
if(ufs_statfs.f_secnfree != 0) /* check for secondary partition */
statinfo->avail = (avail_t) ufs_statfs.f_secnfree;
else
# endif
statinfo->avail = (avail_t) ufs_statfs.f_bfree;
# else
statinfo->avail = (avail_t) ufs_statfs.f_bavail;
# endif
# ifdef NO_F_FRSIZE
/* on some older systems it was f_bsize */
bsize = (int) ufs_statfs.f_bsize;
# else
/* get block size, fail if bszie is still 0 */
bsize = (int) ufs_statfs.f_frsize;
if(bsize==0)bsize =(int) ufs_statfs.f_bsize;
if(bsize==0) ELIO_ERROR(STATFAIL, 1);
if(DEBUG_)
printf("stat: f_frsize=%d f_bsize=%d bsize=%d free blocks=%ld\n",
(int) ufs_statfs.f_frsize,(int) ufs_statfs.f_bsize, bsize,
statinfo->avail );
# endif
# endif
/* translate number of available blocks into kilobytes */
switch (bsize) {
case 512: statinfo->avail /=2; break;
case 1024: break;
case 2048: statinfo->avail *=2; break;
case 4096: statinfo->avail *=4; break;
case 8192: statinfo->avail *=8; break;
case 16384: statinfo->avail *=16; break;
case 32768: statinfo->avail *=32; break;
default: {
double avail;
double factor = ((double)bsize)/1024.0;
avail = factor * (double)statinfo->avail;
statinfo->avail = (avail_t) avail;
}
}
PABLO_end(PABLO_elio_stat);
return(ELIO_OK);
}