1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
*
* Copyright (C) 1997 University of Chicago.
* See COPYRIGHT notice in top-level directory.
*/
#include "ad_pfs.h"
void ADIOI_PFS_Open(ADIO_File fd, int *error_code)
{
int perm, amode, old_mask, np_comm, np_total, err, flag;
char *value;
struct sattr attr;
static char myname[] = "ADIOI_PFS_OPEN";
if (fd->perm == ADIO_PERM_NULL) {
old_mask = umask(022);
umask(old_mask);
perm = old_mask ^ 0666;
}
else perm = fd->perm;
amode = 0;
if (fd->access_mode & ADIO_CREATE)
amode = amode | O_CREAT;
if (fd->access_mode & ADIO_RDONLY)
amode = amode | O_RDONLY;
if (fd->access_mode & ADIO_WRONLY)
amode = amode | O_WRONLY;
if (fd->access_mode & ADIO_RDWR)
amode = amode | O_RDWR;
if (fd->access_mode & ADIO_EXCL)
amode = amode | O_EXCL;
MPI_Comm_size(MPI_COMM_WORLD, &np_total);
MPI_Comm_size(fd->comm, &np_comm);
if (np_total == np_comm)
fd->fd_sys = _gopen(fd->filename, amode, M_ASYNC, perm);
else fd->fd_sys = open(fd->filename, amode, perm);
fd->fd_direct = -1;
if (fd->fd_sys != -1) {
value = (char *) ADIOI_Malloc((MPI_MAX_INFO_VAL+1)*sizeof(char));
/* if user has asked for pfs server buffering to be turned on,
it will be set to true in fd->info in the earlier call
to ADIOI_PFS_SetInfo. Turn it on now, since we now have a
valid file descriptor. */
ADIOI_Info_get(fd->info, "pfs_svr_buf", MPI_MAX_INFO_VAL,
value, &flag);
if (flag && (!strcmp(value, "true"))) {
err = fcntl(fd->fd_sys, F_PFS_SVR_BUF, TRUE);
if (err) ADIOI_Info_set(fd->info, "pfs_svr_buf", "false");
}
/* get file striping information and set it in info */
err = fcntl(fd->fd_sys, F_GETSATTR, &attr);
if (!err) {
ADIOI_Snprintf(value, MPI_MAX_INFO_VAL+1, "%d", attr.s_sunitsize);
ADIOI_Info_set(fd->info, "striping_unit", value);
ADIOI_Snprintf(value, MPI_MAX_INFO_VAL+1, "%d", attr.s_sfactor);
ADIOI_Info_set(fd->info, "striping_factor", value);
ADIOI_Snprintf(value, MPI_MAX_INFO_VAL+1, "%d", attr.s_start_sdir);
ADIOI_Info_set(fd->info, "start_iodevice", value);
}
ADIOI_Free(value);
if (fd->access_mode & ADIO_APPEND)
fd->fp_ind = fd->fp_sys_posn = lseek(fd->fd_sys, 0, SEEK_END);
}
if (fd->fd_sys == -1) {
*error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
myname, __LINE__, MPI_ERR_IO,
"**io",
"**io %s", strerror(errno));
}
else *error_code = MPI_SUCCESS;
}
|
