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/*
* 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; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will 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 to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <dirent.h>
#include <string.h>
#include <unistd.h>
#include <stdint.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <limits.h>
#include "cld.h"
#include "sqlite.h"
#include "xlog.h"
#include "legacy.h"
#define NFSD_RECDIR_FILE "/proc/fs/nfsd/nfsv4recoverydir"
/*
* Loads client records from the v4recovery directory into the database.
* Records are prefixed with the string "hash:" and include the '\0' byte.
*
* Called during database initialization as part of a one-time "upgrade".
*/
void
legacy_load_clients_from_recdir(int *num_records)
{
int fd;
DIR *v4recovery;
struct dirent *entry;
char recdirname[PATH_MAX+1];
char buf[NFS4_OPAQUE_LIMIT];
char *nl;
ssize_t n;
fd = open(NFSD_RECDIR_FILE, O_RDONLY);
if (fd < 0) {
xlog(D_GENERAL, "Unable to open %s: %m", NFSD_RECDIR_FILE);
return;
}
n = read(fd, recdirname, PATH_MAX);
close(fd);
if (n < 0) {
xlog(D_GENERAL, "Unable to read from %s: %m", NFSD_RECDIR_FILE);
return;
}
/* the output from the proc file isn't null-terminated */
recdirname[PATH_MAX] = '\0';
nl = strchr(recdirname, '\n');
if (!nl)
return;
*nl = '\0';
v4recovery = opendir(recdirname);
if (!v4recovery)
return;
while ((entry = readdir(v4recovery))) {
int ret;
/* skip "." and ".." */
if (entry->d_name[0] == '.') {
switch (entry->d_name[1]) {
case '\0':
continue;
case '.':
if (entry->d_name[2] == '\0')
continue;
}
}
/* prefix legacy records with the string "hash:" */
ret = snprintf(buf, sizeof(buf), "hash:%s", entry->d_name);
/* if there's a problem, then skip this entry */
if (ret < 0 || (size_t)ret >= sizeof(buf)) {
xlog(L_WARNING, "%s: unable to build client string for %s!",
__func__, entry->d_name);
continue;
}
/* legacy client records need to include the null terminator */
ret = sqlite_insert_client((unsigned char *)buf, strlen(buf) + 1);
if (ret)
xlog(L_WARNING, "%s: unable to insert %s: %d", __func__,
entry->d_name, ret);
else
(*num_records)++;
}
closedir(v4recovery);
}
/*
* Cleans out the v4recovery directory.
*
* Called upon receipt of the first "GraceDone" upcall only.
*/
void
legacy_clear_recdir(void)
{
int fd;
DIR *v4recovery;
struct dirent *entry;
char recdirname[PATH_MAX+1];
char dirname[PATH_MAX];
char *nl;
ssize_t n;
fd = open(NFSD_RECDIR_FILE, O_RDONLY);
if (fd < 0) {
xlog(D_GENERAL, "Unable to open %s: %m", NFSD_RECDIR_FILE);
return;
}
n = read(fd, recdirname, PATH_MAX);
close(fd);
if (n < 0) {
xlog(D_GENERAL, "Unable to read from %s: %m", NFSD_RECDIR_FILE);
return;
}
/* the output from the proc file isn't null-terminated */
recdirname[PATH_MAX] = '\0';
nl = strchr(recdirname, '\n');
if (!nl)
return;
*nl = '\0';
v4recovery = opendir(recdirname);
if (!v4recovery)
return;
while ((entry = readdir(v4recovery))) {
int len;
/* skip "." and ".." */
if (entry->d_name[0] == '.') {
switch (entry->d_name[1]) {
case '\0':
continue;
case '.':
if (entry->d_name[2] == '\0')
continue;
}
}
len = snprintf(dirname, sizeof(dirname), "%s/%s", recdirname,
entry->d_name);
/* if there's a problem, then skip this entry */
if (len < 0 || (size_t)len >= sizeof(dirname)) {
xlog(L_WARNING, "%s: unable to build filename for %s!",
__func__, entry->d_name);
continue;
}
len = rmdir(dirname);
if (len)
xlog(L_WARNING, "%s: unable to rmdir %s: %d", __func__,
dirname, len);
}
closedir(v4recovery);
}
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