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mars-nwe/nwvolume.c

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/* nwvolume.c 02-Aug-97 */
/* (C)opyright (C) 1993,1996 Martin Stover, Marburg, Germany
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "net.h"
#include <dirent.h>
#include <errno.h>
#include <sys/vfs.h>
#ifndef LINUX
#include <sys/statvfs.h>
#define statfs statvfs
#endif
#include <utime.h>
#include "nwfname.h"
#include "nwvolume.h"
NW_VOL *nw_volumes=NULL;
int used_nw_volumes=0;
int loaded_namespaces=0;
uint8 *home_dir=NULL;
int home_dir_len=0;
char *path_vol_inodes_cache=NULL;
static int max_nw_vols=MAX_NW_VOLS;
static void volume_to_namespace_map(int volume, NW_VOL *vol)
{
struct stat statb;
DEV_NAMESPACE_MAP dnm;
if (stat(vol->unixname, &statb)) {
XDPRINTF((1, 0, "cannot stat vol=%d, `%s`", volume, vol->unixname));
return;
}
dnm.dev = statb.st_dev;
dnm.namespace = 0; /* NAMESPACE DOS */
(void) nw_vol_inode_to_handle(volume, statb.st_ino, &dnm);
}
void nw_init_volumes(FILE *f)
/* f = inifile Pointer, must be opened !! */
{
static int volumes_is_init=0;
int what;
uint8 buff[256];
int k = -1;
if (!volumes_is_init) {
volumes_is_init++;
rewind(f);
if (get_ini_entry(f, 61, buff, sizeof(buff))) {
max_nw_vols=atoi(buff);
if (max_nw_vols < 2)
max_nw_vols=MAX_NW_VOLS;
}
nw_volumes=(NW_VOL*)xcmalloc(max_nw_vols*sizeof(NW_VOL));
} else {
while (++k < max_nw_vols) {
int i = -1;
while (++i < nw_volumes[k].maps_count)
xfree(nw_volumes[k].dev_namespace_maps[i]);
nw_volumes[k].maps_count = 0;
}
}
rewind(f);
used_nw_volumes = 0;
loaded_namespaces = 0;
new_str(path_vol_inodes_cache, "/var/spool/nwserv/.volcache");
while (0 != (what = get_ini_entry(f, 0, buff, sizeof(buff)))) {
if ( what == 1 && used_nw_volumes < max_nw_vols && strlen((char*)buff) > 3){
uint8 sysname[256];
uint8 unixname[256];
char optionstr[256];
char *p;
int len;
int founds = sscanf((char*)buff, "%s %s %s",sysname, unixname, optionstr);
if (founds > 1) {
NW_VOL *vol=&(nw_volumes[used_nw_volumes]);
vol->options = VOL_NAMESPACE_DOS;
loaded_namespaces |= VOL_NAMESPACE_DOS;
up_fn(sysname);
new_str(vol->sysname, sysname);
if (1 == (len = strlen((char*)unixname)) && unixname[0] == '~') {
vol->options |= VOL_OPTION_IS_HOME;
vol->options |= VOL_OPTION_REMOUNT;
unixname[0] = '\0';
len = 0;
} else if (unixname[len-1] != '/') {
unixname[len++] = '/';
unixname[len] = '\0';
}
vol->unixnamlen = len;
new_str(vol->unixname, unixname);
if (founds > 2) {
for (p=optionstr; *p; p++) {
switch (*p) {
case 'i' : vol->options
|= VOL_OPTION_IGNCASE;
break;
case 'k' : vol->options
|= VOL_OPTION_DOWNSHIFT;
break;
case 'm' : vol->options
|= VOL_OPTION_REMOUNT;
break;
case 'o' : vol->options
|= VOL_OPTION_ONE_DEV;
break;
case 'p' : vol->options
|= VOL_OPTION_IS_PIPE;
break;
case 'r' : vol->options
|= VOL_OPTION_READONLY;
break;
case 'O' : vol->options
|= VOL_NAMESPACE_OS2;
loaded_namespaces |= VOL_NAMESPACE_OS2;
break;
case 'N' : vol->options
|= VOL_NAMESPACE_NFS;
loaded_namespaces |= VOL_NAMESPACE_NFS;
break;
default : break;
}
}
}
used_nw_volumes++;
if (vol->options & VOL_OPTION_ONE_DEV) {
vol->max_maps_count = 1;
vol->high_inode = 0xffffffff;
} else {
vol->max_maps_count = MAX_DEV_NAMESPACE_MAPS;
vol->high_inode = 0xfffffff;
}
if (vol->unixnamlen)
volume_to_namespace_map(used_nw_volumes-1, vol);
}
} else if (what==40) { /* path for vol/dev/inode->path cache */
new_str(path_vol_inodes_cache, buff);
}
} /* while */
}
void nw_setup_home_vol(int len, uint8 *fn)
{
int k=used_nw_volumes;
uint8 unixname[258];
unixname[0] = '\0';
xfree(home_dir);
home_dir_len=0;
if (len > 0) {
strmaxcpy(unixname, fn, len);
if (unixname[len-1] != '/') {
unixname[len++] = '/';
unixname[len] = '\0';
}
new_str(home_dir, unixname);
home_dir_len=len;
}
while (k--) { /* now set all HOME volumes */
if (nw_volumes[k].options & VOL_OPTION_IS_HOME) {
int i = -1;
while (++i < nw_volumes[k].maps_count)
xfree(nw_volumes[k].dev_namespace_maps[i]);
nw_volumes[k].maps_count = 0;
nw_volumes[k].unixnamlen = len;
new_str(nw_volumes[k].unixname, unixname);
if (len>0)
volume_to_namespace_map(k, &(nw_volumes[k]));
}
}
}
static int look_name_space_map(NW_VOL *v, DEV_NAMESPACE_MAP *dnm,
int do_insert)
{
DEV_NAMESPACE_MAP *mp;
int k=-1;
while (++k < v->maps_count) {
mp=v->dev_namespace_maps[k];
if (mp->dev == dnm->dev && mp->namespace == dnm->namespace)
return(k);
}
if (do_insert && v->maps_count < v->max_maps_count) {
/* now do insert the new map */
mp = v->dev_namespace_maps[v->maps_count++] =
(DEV_NAMESPACE_MAP*) xmalloc(sizeof(DEV_NAMESPACE_MAP));
memcpy(mp, dnm, sizeof(DEV_NAMESPACE_MAP));
return(k);
}
return(-1);
}
uint32 nw_vol_inode_to_handle(int volume, ino_t inode,
DEV_NAMESPACE_MAP *dnm)
{
if (volume > -1 && volume < used_nw_volumes) {
NW_VOL *v= &(nw_volumes[volume]);
if (inode > 0 && inode <= v->high_inode) {
int result = look_name_space_map(v, dnm, 1);
if (result > -1) {
uint32 handle = (v->options & VOL_OPTION_ONE_DEV)
? (uint32)inode
: (((uint32)result) << 28) | (uint32) inode;
XDPRINTF((3,0, "Handle map inode=%d, dev=%d, namespace=%d to handle 0x%x",
inode, dnm->dev, dnm->namespace, handle));
return(handle);
}
}
}
XDPRINTF((1,0, "Cannot map inode=%d, dev=%d, namespace=%d to vol=%d handle",
inode, dnm->dev, dnm->namespace, volume));
return(0L);
}
ino_t nw_vol_handle_to_inode(int volume, uint32 handle,
DEV_NAMESPACE_MAP *dnm)
/* converts volume, handle to dev->inode->namespace */
{
if (handle > 0 && volume > -1 && volume < used_nw_volumes) {
NW_VOL *v= &(nw_volumes[volume]);
int entry = (v->options & VOL_OPTION_ONE_DEV)
? 0
: (int) ((handle >> 28) & 0xF);
if (entry > -1 && entry < v->maps_count) {
if (dnm) memcpy(dnm, v->dev_namespace_maps[entry],
sizeof(DEV_NAMESPACE_MAP));
XDPRINTF((3, 0, "vol=%d, handle=0x%x to ino=%d, dev=%d, namespace=%d",
volume, handle, (int)(handle & v->high_inode),
v->dev_namespace_maps[entry]->dev,
v->dev_namespace_maps[entry]->namespace));
return((ino_t) (handle & v->high_inode));
}
}
XDPRINTF((1, 0, "Can't vol=%d, handle=0x%x to inode", volume, handle));
return(-1);
}
int nw_get_volume_number(uint8 *volname, int namelen)
/* Get Volume Number with name */
/* returns Volume Nummer or if error < 0 */
{
int result = -0x98; /* Volume not exist */
uint8 vname[255];
int j = used_nw_volumes;
strmaxcpy(vname, volname, namelen);
up_fn(vname);
while (j--) {
if (!strcmp((char*)nw_volumes[j].sysname, (char*)vname)) {
result = j;
break;
}
}
XDPRINTF((5,0,"GET_VOLUME_NUMBER of:%s: result = 0x%x", vname, result));
return(result);
}
int nw_get_volume_name(int volnr, uint8 *volname)
/* returns < 0 if error, else len of volname */
{
int result = -0x98; /* Volume not exist */;
if (volnr > -1 && volnr < used_nw_volumes) {
if (volname != NULL) {
strcpy((char*)volname, (char*)nw_volumes[volnr].sysname);
result = strlen((char*)volname);
} else result= strlen((char*)nw_volumes[volnr].sysname);
} else {
if (NULL != volname) *volname = '\0';
if (volnr < max_nw_vols) result=0;
}
if (nw_debug > 4) {
uint8 xvolname[10];
if (!volname) {
volname = xvolname;
*volname = '\0';
}
XDPRINTF((5,0,"GET_VOLUME_NAME von:%d = %s: ,result=0x%x", volnr, volname, result));
}
return(result);
}
/* stolen from GNU-fileutils */
static long adjust_blocks (long blocks, int fromsize, int tosize)
{
if (fromsize == tosize) /* E.g., from 512 to 512. */
return blocks;
else if (fromsize > tosize) /* E.g., from 2048 to 512. */
return blocks * (fromsize / tosize);
else /* E.g., from 256 to 512. */
return (blocks + (blocks < 0 ? -1 : 1)) / (tosize / fromsize);
}
static int get_fs_usage(char *path, struct fs_usage *fsp)
{
struct statfs fsd;
if (statfs (path, &fsd) < 0) return (-1);
#if 0
/* test for a 'big' volume */
fsd.f_blocks = 3733075;
fsd.f_bfree = 1531638;
fsd.f_bavail = 1338518;
fsd.f_files = 966656;
fsd.f_ffree = 916066;
fsd.f_bsize = 1024;
#elif 0
/* test for other 'big' volume */
fsd.f_blocks = 1783108;
fsd.f_bfree = 892839;
fsd.f_bavail = 800680;
fsd.f_files = 460800;
fsd.f_ffree = 415474;
fsd.f_bsize = 1024;
#endif
XDPRINTF((3, 0,
"blocks=%d, bfree=%d, bavail=%d, files=%d, ffree=%d, bsize=%d",
fsd.f_blocks, fsd.f_bfree, fsd.f_bavail,
fsd.f_files, fsd.f_ffree, fsd.f_bsize));
#define convert_blocks(b) adjust_blocks ((b), fsd.f_bsize, 512)
fsp->fsu_blocks = convert_blocks (fsd.f_blocks);
fsp->fsu_bfree = convert_blocks (fsd.f_bfree);
fsp->fsu_bavail = convert_blocks (fsd.f_bavail);
fsp->fsu_files = fsd.f_files;
fsp->fsu_ffree = fsd.f_ffree;
return(0);
}
int nw_get_fs_usage(uint8 *volname, struct fs_usage *fsu)
/* returns 0 if OK, else errocode < 0 */
{
int volnr = nw_get_volume_number(volname, strlen((char*)volname));
if (volnr > -1) {
NW_VOL *v=&(nw_volumes[volnr]);
if (0 == (volnr=get_fs_usage((char*)v->unixname, fsu))) {
if (v->options & VOL_OPTION_READONLY) {
fsu->fsu_bfree = 0;
fsu->fsu_bavail = 0;
fsu->fsu_ffree = 0;
}
}
}
return(volnr);
}
int get_volume_options(int volnr)
{
int result = 0;
if (volnr > -1 && volnr < used_nw_volumes)
result = nw_volumes[volnr].options;
XDPRINTF((5,0,"get_volume_options of VOLNR:%d, result=0x%x", volnr, result));
return(result);
}
int get_volume_inode(int volnr, struct stat *stb)
/* returns inode if OK, else errocode < 0 */
{
int result = -0x98; /* Volume not exist */;
if (volnr > -1 && volnr < used_nw_volumes) {
struct stat statb;
if (!stb) stb=&statb;
result = stat(nw_volumes[volnr].unixname, stb);
if (result == -1) result=-0x98;
else result=stb->st_ino;
}
XDPRINTF((5,0,"get_volume_inode of VOLNR:%d, result=0x%x", volnr, result));
return(result);
}
#if QUOTA_SUPPORT
/* QUOTA support from: Matt Paley */
#include <sys/stat.h>
#include <unistd.h>
#include <mntent.h>
/* Return the device special file that the specified path uses */
const char *find_device_file(const char *path)
{
struct stat s;
dev_t dev;
struct mntent *mntent;
FILE *fp;
const char *mount_device;
if (path == (char *) NULL || *path == '\0' || stat(path, &s) != 0)
return((char *) NULL);
dev = s.st_dev;
if ((fp=setmntent(MOUNTED, "r")) == (FILE *) NULL)
return((char *) NULL);
mount_device = (char *) NULL;
while (!ferror(fp)) {
/* mntent will be a static struct mntent */
mntent = getmntent(fp);
if (mntent == (struct mntent *) NULL)
break;
if (stat(mntent->mnt_fsname, &s) == 0) {
if (S_ISCHR(s.st_mode) || S_ISBLK(s.st_mode)) {
if (s.st_rdev == dev) {
/* Found it */
mount_device = mntent->mnt_fsname;
break;
}
}
}
}
endmntent(fp);
return(mount_device);
}
#include <time.h>
#include <sys/types.h>
#ifdef LINUX
# include <linux/quota.h>
# if defined(__alpha__)
# include <errno.h>
# include <syscall.h>
# include <asm/unistd.h>
int quotactl(int cmd, const char * special, int id, caddr_t addr)
{
return syscall(__NR_quotactl, cmd, special, id, addr);
}
# else /* not __alpha__ */
# define __LIBRARY__
# include <linux/unistd.h>
_syscall4(int, quotactl, int, cmd, const char *, special,
int, id, caddr_t, addr);
# endif /* __alpha__ */
#endif /* LINUX */
static int su_quotactl(int cmd, const char * special, int id, caddr_t addr)
{
int result;
int euid=geteuid();
seteuid(0);
result=quotactl(cmd, special, id, addr);
if (seteuid(euid)) {
errorp(1, "seteuid", "cannot change to uid=%d\n", euid);
exit(1);
}
return(result);
}
/* NOTE: The error numbers in here are probably wrong */
int nw_set_vol_restrictions(uint8 volnr, int uid, uint32 quota)
{
const char *device;
struct dqblk dqblk;
int res;
XDPRINTF((2,0, "nw_set_vol_restrictions vol=%d uid=%d quota=%d blocks",
volnr, uid, quota));
/* Convert from blocks to K */
quota *= 4;
if (volnr >= used_nw_volumes || nw_volumes == (NW_VOL *) NULL)
return(-0x98);
device=find_device_file(nw_volumes[volnr].unixname);
if (device == (char *) NULL)
return(-0x98);
/* If this call fails then it it probable that quotas are not enabled
* on the specified device. Someone needs to set the error number
* to whatever will make most sense to netware.
*/
res=su_quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device, uid, (caddr_t) &dqblk);
if (res != 0)
return(0);
dqblk.dqb_bhardlimit = quota;
dqblk.dqb_bsoftlimit = quota;
if (quota == 0)
dqblk.dqb_ihardlimit = dqblk.dqb_isoftlimit = 0;
XDPRINTF((2,0, "Set quota device=%s uid=%d %d(%d)K %d(%d) files",
device, uid,
dqblk.dqb_bhardlimit,
dqblk.dqb_curblocks,
dqblk.dqb_ihardlimit,
dqblk.dqb_curinodes));
(void)su_quotactl(QCMD(Q_SETQLIM, USRQUOTA), device, uid, (caddr_t) &dqblk);
return(0);
}
int nw_get_vol_restrictions(uint8 volnr, int uid, uint32 *quota, uint32 *inuse)
{
const char *device;
struct dqblk dqblk;
int res;
*quota = 0x40000000;
*inuse = 0;
if (volnr >= used_nw_volumes || nw_volumes == (NW_VOL *) NULL)
return(-0x98);
device=find_device_file(nw_volumes[volnr].unixname);
if (device == (char *) NULL)
return(-0x98);
XDPRINTF((2,0, "Get quota for uid %d on device %s",
uid, device));
res=su_quotactl(QCMD(Q_GETQUOTA, USRQUOTA), device, uid, (caddr_t) &dqblk);
if (res != 0)
return(0); /* Quotas are probably not enabled */
if (dqblk.dqb_bhardlimit == 0) {
*quota = 0x40000000;
*inuse = 0;
} else {
*quota = dqblk.dqb_bhardlimit / 4; /* Convert from K to blocks */
*inuse = dqblk.dqb_curblocks / 4;
}
return(0);
}
#else
int nw_set_vol_restrictions(uint8 volnr, int uid, uint32 quota)
{
return(-0xfb);
}
int nw_get_vol_restrictions(uint8 volnr, int uid, uint32 *quota, uint32 *inuse)
{
*quota = 0x40000000;
*inuse = 0;
return(0);
}
#endif
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