int
FUNC___OPEN(const char *path, int oflag, ...)
{
GFS_File gf;
const char *e;
char *url;
va_list ap;
mode_t mode;
int filedes;
struct gfs_stat gs;
int file_exist, file_size = 0, is_directory = 0;
int nf = -1, np;
va_start(ap, oflag);
mode = va_arg(ap, mode_t);
va_end(ap);
_gfs_hook_debug_v(fprintf(stderr,
"Hooking " S(FUNC___OPEN) "(%s, 0x%x)\n", path, oflag));
if (!gfs_hook_is_url(path, &url))
return (SYSCALL_OPEN(path, oflag, mode));
if (gfs_hook_get_current_view() == section_view)
e = gfs_stat_section(url, gfs_hook_get_current_section(), &gs);
else
e = gfs_stat(url, &gs);
if (e == GFARM_ERR_NO_SUCH_OBJECT)
file_exist = 0;
else if (e == NULL) {
file_exist = 1;
file_size = gs.st_size;
is_directory = GFARM_S_ISDIR(gs.st_mode);
gfs_stat_free(&gs);
}
else {
_gfs_hook_debug(fprintf(stderr,
"GFS: Hooking " S(FUNC___OPEN) ": gfs_stat: %s\n", e));
/* XXX - metadata may be incomplete. anyway, continue. */
file_exist = 1;
file_size = 0;
/* XXX - metadata of a directory should not be imcomplete */
is_directory = 0;
}
/*
* XXX - stopgap implementation of O_WRONLY/O_RDWR, O_CREAT,
* O_TRUNC flags
*/
if (!file_exist && (oflag & O_CREAT) != 0) {
_gfs_hook_debug(fprintf(stderr,
"GFS: Hooking " S(FUNC___OPEN) "(%s, 0x%x, 0%o)\n",
url, oflag, mode));
e = gfs_pio_create(url, oflag, mode, &gf);
if (e == NULL)
gfs_hook_add_creating_file(gf);
}
else if ((oflag & O_ACCMODE) == O_WRONLY
|| (oflag & O_ACCMODE) == O_RDWR) {
_gfs_hook_debug(fprintf(stderr,
"GFS: Hooking " S(FUNC___OPEN) "(%s, 0x%x, 0%o)\n",
url, oflag, mode));
if (file_exist && (file_size == 0 || (oflag & O_TRUNC) != 0)) {
/*
* XXX - O_TRUNC is basically supported in
* Gfarm v1 except in global file view.
* This case needs to be implemented in
* gfs_pio_set_view_global() in gfs_pio_global.c.
*/
if (gfs_hook_get_current_view() == global_view)
gfs_unlink(url); /* XXX - FIXME */
/*
* gfs_pio_create assumes GFARM_FILE_TRUNC.
* It is not necessary to set O_TRUNC explicitly.
*/
e = gfs_pio_create(url, oflag, mode, &gf);
if (e == NULL)
gfs_hook_add_creating_file(gf);
}
else if (file_exist) { /* read-write mode: not supported yet */
_gfs_hook_debug(fprintf(stderr,
"GFS: Hooking " S(FUNC___OPEN)
": unsupported flags 0%o\n", oflag));
free(url);
errno = ENOSYS;
return (-1);
}
else { /* no such file or directory */
_gfs_hook_debug(fprintf(stderr,
"GFS: Hooking " S(FUNC___OPEN)
": no such file or directory\n"));
free(url);
errno = ENOENT;
return (-1);
}
}
/* XXX - end of stopgap implementation */
else {
_gfs_hook_debug(fprintf(stderr,
"GFS: Hooking " S(FUNC___OPEN) "(%s, 0x%x)\n", url, oflag));
if (file_exist && is_directory) {
GFS_Dir dir;
e = gfs_opendir(url, &dir);
if (e == NULL) {
filedes = gfs_hook_insert_gfs_dir(dir, url);
_gfs_hook_debug(
if (filedes != -1) {
fprintf(stderr,
"GFS: Hooking "
S(FUNC___OPEN)
" --> %d\n", filedes);
}
);
free(url);
return (filedes);
}
int
FUNC___XSTAT(int ver, const char *path, STRUCT_STAT *buf)
{
const char *e;
char *url;
struct gfs_stat gs;
int nf = -1, np, errno_save = errno;
_gfs_hook_debug_v(gflog_info(GFARM_MSG_UNFIXED,
"Hooking " S(FUNC___XSTAT) "(%s)",
path));
if (!gfs_hook_is_url(path, &url))
return (SYSCALL_XSTAT(ver, path, buf));
_gfs_hook_debug(gflog_info(GFARM_MSG_UNFIXED,
"GFS: Hooking " S(FUNC___XSTAT) "(%s)", path));
switch (gfs_hook_get_current_view()) {
case section_view:
_gfs_hook_debug(gflog_info(GFARM_MSG_UNFIXED,
"GFS: " S(GFS_STAT_SECTION) "(%s, %s)",
url, gfs_hook_get_current_section()));
e = GFS_STAT_SECTION(url, gfs_hook_get_current_section(), &gs);
break;
case index_view:
_gfs_hook_debug(gflog_info(GFARM_MSG_UNFIXED,
"GFS: " S(GFS_STAT_INDEX) "(%s, %d)",
url, gfs_hook_get_current_index()));
e = GFS_STAT_INDEX(url, gfs_hook_get_current_index(), &gs);
break;
case local_view:
/*
* If the number of fragments is not the same as the
* number of parallel processes, or the file is not
* fragmented, do not change to the local file view.
*/
if (gfarm_url_fragment_number(url, &nf) == NULL) {
if (gfs_pio_get_node_size(&np) == NULL && nf == np) {
_gfs_hook_debug(gflog_info(GFARM_MSG_UNFIXED,
"GFS: " S(GFS_STAT_INDEX) "(%s, %d)",
url, gfarm_node));
e = GFS_STAT_INDEX(url, gfarm_node, &gs);
}
else {
_gfs_hook_debug(gflog_info(GFARM_MSG_UNFIXED,
"GFS: " S(GFS_STAT) "(%s)", url));
e = GFS_STAT(url, &gs);
}
}
else {
_gfs_hook_debug(gflog_info(GFARM_MSG_UNFIXED,
"GFS: " S(GFS_STAT) "(%s)", url));
e = GFS_STAT(url, &gs);
}
break;
default:
_gfs_hook_debug(gflog_info(GFARM_MSG_UNFIXED,
"GFS: " S(GFS_STAT) "(%s)", url));
e = GFS_STAT(url, &gs);
}
free(url);
if (e == NULL) {
struct passwd *p;
memset(buf, 0, sizeof(*buf));
buf->st_dev = GFS_DEV;
buf->st_ino = gs.st_ino;
buf->st_mode = gs.st_mode;
buf->st_nlink = S_ISDIR(buf->st_mode) ? GFS_NLINK_DIR : 1;
/* XXX FIXME: need to convert gfarm global user to UNIX uid */
p = getpwnam(gfarm_get_local_username());
if (p != NULL) {
buf->st_uid = p->pw_uid;
buf->st_gid = p->pw_gid;
} else {
buf->st_uid = getuid(); /* XXX */
buf->st_gid = getgid(); /* XXX */
}
buf->st_size = gs.st_size;
buf->st_blksize = GFS_BLKSIZE;
buf->st_blocks = (gs.st_size + STAT_BLKSIZ - 1) / STAT_BLKSIZ;
buf->st_atime = gs.st_atimespec.tv_sec;
buf->st_mtime = gs.st_mtimespec.tv_sec;
buf->st_ctime = gs.st_ctimespec.tv_sec;
gfs_stat_free(&gs);
errno = errno_save;
return (0);
}
_gfs_hook_debug(gflog_info(GFARM_MSG_UNFIXED,
"GFS: " S(FUNC___XSTAT) ": %s", e));
errno = gfarm_error_to_errno(e);
return (-1);
}
int
FUNC___OPEN(const char *path, int oflag, ...)
{
GFS_File gf;
const char *e;
char *url;
va_list ap;
mode_t mode;
int filedes;
struct gfs_stat gs;
int is_directory, save_errno;
int nf = -1, np;
va_start(ap, oflag);
/*
* We need `int' instead of `mode_t' in va_arg() below, because
* sizeof(mode_t) < sizeof(int) on some platforms (e.g. FreeBSD),
* and gcc-3.4/gcc-4's builtin va_arg() warns the integer promotion.
* XXX this doesn't work, if sizeof(mode_t) > sizeof(int),
* but currently there isn't any such platform as far as we know.
*/
mode = va_arg(ap, int);
va_end(ap);
_gfs_hook_debug_v(gflog_info(
"Hooking " S(FUNC___OPEN) "(%s, 0%o)", path, oflag));
if (!gfs_hook_is_url(path, &url))
return (SYSCALL_OPEN(path, oflag, mode));
if (gfs_hook_get_current_view() == section_view)
e = gfs_stat_section(url, gfs_hook_get_current_section(), &gs);
else
e = gfs_stat(url, &gs);
if (e == NULL) {
is_directory = GFARM_S_ISDIR(gs.st_mode);
gfs_stat_free(&gs);
} else {
/* XXX - metadata may be incomplete. anyway, continue. */
/* XXX - metadata of a directory should not be imcomplete */
is_directory = 0;
if (e != GFARM_ERR_NO_SUCH_OBJECT)
_gfs_hook_debug(gflog_info(
"GFS: Hooking " S(FUNC___OPEN) ": gfs_stat: %s",
e));
}
if (is_directory) {
GFS_Dir dir;
_gfs_hook_debug(gflog_info(
"GFS: Hooking " S(FUNC___OPEN) "(%s, 0%o): dir",
url, oflag));
if ((oflag & (O_CREAT|O_TRUNC)) != 0 ||
(oflag & O_ACCMODE) != O_RDONLY) {
free(url);
errno = EISDIR;
return (-1);
}
e = gfs_opendir(url, &dir);
if (e == NULL) {
filedes = gfs_hook_insert_gfs_dir(dir, url);
save_errno = errno;
_gfs_hook_debug(
gflog_info("GFS: Hooking "
S(FUNC___OPEN) " --> %d", filedes);
);
free(url);
if (filedes == -1)
errno = save_errno;
return (filedes);
}
