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samba-mirror/source3/lib/sysquotas.c
Björn Jacke 0b57d1c075 quota: add supprt for gfs2
gfs2 uses the same generic quota interface as xfs and it has the same base
block/quota block size ratio and seems to work nice with the xfs quota module.

(People using gfs should be aware that quota reporting is lagging quite a bit
on gfs.  If you copy a file on a gfs volume the quota values are being updated
with a delay of 30s here with kernel 3.5. This reporting can lead to data
corruption if a client thinks he can write but actually he suddently can't.)
2012-09-18 14:30:25 +02:00

528 lines
12 KiB
C

/*
Unix SMB/CIFS implementation.
System QUOTA function wrappers
Copyright (C) Stefan (metze) Metzmacher 2003
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_QUOTA
#ifdef HAVE_SYS_QUOTAS
#if defined(HAVE_QUOTACTL_4A)
/*#endif HAVE_QUOTACTL_4A */
#elif defined(HAVE_QUOTACTL_4B)
/*#endif HAVE_QUOTACTL_4B */
#elif defined(HAVE_QUOTACTL_3)
#error HAVE_QUOTACTL_3 not implemented
/* #endif HAVE_QUOTACTL_3 */
#else /* NO_QUOTACTL_USED */
#endif /* NO_QUOTACTL_USED */
#ifdef HAVE_MNTENT
static int sys_path_to_bdev(const char *path, char **mntpath, char **bdev, char **fs)
{
int ret = -1;
SMB_STRUCT_STAT S;
FILE *fp;
struct mntent *mnt;
SMB_DEV_T devno;
/* find the block device file */
if (!path||!mntpath||!bdev||!fs)
smb_panic("sys_path_to_bdev: called with NULL pointer");
(*mntpath) = NULL;
(*bdev) = NULL;
(*fs) = NULL;
if ( sys_stat(path, &S, false) == -1 )
return (-1);
devno = S.st_ex_dev ;
fp = setmntent(MOUNTED,"r");
if (fp == NULL) {
return -1;
}
while ((mnt = getmntent(fp))) {
if ( sys_stat(mnt->mnt_dir, &S, false) == -1 )
continue ;
if (S.st_ex_dev == devno) {
(*mntpath) = SMB_STRDUP(mnt->mnt_dir);
(*bdev) = SMB_STRDUP(mnt->mnt_fsname);
(*fs) = SMB_STRDUP(mnt->mnt_type);
if ((*mntpath)&&(*bdev)&&(*fs)) {
ret = 0;
} else {
SAFE_FREE(*mntpath);
SAFE_FREE(*bdev);
SAFE_FREE(*fs);
ret = -1;
}
break;
}
}
endmntent(fp) ;
return ret;
}
/* #endif HAVE_MNTENT */
#elif defined(HAVE_DEVNM)
/* we have this on HPUX, ... */
static int sys_path_to_bdev(const char *path, char **mntpath, char **bdev, char **fs)
{
int ret = -1;
char dev_disk[256];
SMB_STRUCT_STAT S;
if (!path||!mntpath||!bdev||!fs)
smb_panic("sys_path_to_bdev: called with NULL pointer");
(*mntpath) = NULL;
(*bdev) = NULL;
(*fs) = NULL;
/* find the block device file */
if ((ret=sys_stat(path, &S, false))!=0) {
return ret;
}
if ((ret=devnm(S_IFBLK, S.st_ex_dev, dev_disk, 256, 1))!=0) {
return ret;
}
/* we should get the mntpath right...
* but I don't know how
* --metze
*/
(*mntpath) = SMB_STRDUP(path);
(*bdev) = SMB_STRDUP(dev_disk);
if ((*mntpath)&&(*bdev)) {
ret = 0;
} else {
SAFE_FREE(*mntpath);
SAFE_FREE(*bdev);
ret = -1;
}
return ret;
}
/* #endif HAVE_DEVNM */
#else
/* we should fake this up...*/
static int sys_path_to_bdev(const char *path, char **mntpath, char **bdev, char **fs)
{
int ret = -1;
if (!path||!mntpath||!bdev||!fs)
smb_panic("sys_path_to_bdev: called with NULL pointer");
(*mntpath) = NULL;
(*bdev) = NULL;
(*fs) = NULL;
(*mntpath) = SMB_STRDUP(path);
if (*mntpath) {
ret = 0;
} else {
SAFE_FREE(*mntpath);
ret = -1;
}
return ret;
}
#endif
/*********************************************************************
Now the list of all filesystem specific quota systems we have found
**********************************************************************/
static struct {
const char *name;
int (*get_quota)(const char *path, const char *bdev, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp);
int (*set_quota)(const char *path, const char *bdev, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp);
} sys_quota_backends[] = {
#if defined HAVE_XFS_QUOTAS
{"xfs", sys_get_xfs_quota, sys_set_xfs_quota},
{"gfs", sys_get_xfs_quota, sys_set_xfs_quota},
{"gfs2", sys_get_xfs_quota, sys_set_xfs_quota},
#endif /* HAVE_XFS_QUOTAS */
#ifdef HAVE_NFS_QUOTAS
{"nfs", sys_get_nfs_quota, sys_set_nfs_quota},
{"nfs4", sys_get_nfs_quota, sys_set_nfs_quota},
#endif /* HAVE_NFS_QUOTAS */
{NULL, NULL, NULL}
};
static int command_get_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
{
const char *get_quota_command;
char **lines = NULL;
get_quota_command = lp_get_quota_command(talloc_tos());
if (get_quota_command && *get_quota_command) {
const char *p;
char *p2;
char *syscmd = NULL;
int _id = -1;
switch(qtype) {
case SMB_USER_QUOTA_TYPE:
case SMB_USER_FS_QUOTA_TYPE:
_id = id.uid;
break;
case SMB_GROUP_QUOTA_TYPE:
case SMB_GROUP_FS_QUOTA_TYPE:
_id = id.gid;
break;
default:
DEBUG(0,("invalid quota type.\n"));
return -1;
}
if (asprintf(&syscmd, "%s %s %d %d",
get_quota_command, path, qtype, _id) < 0) {
return -1;
}
DEBUG (3, ("get_quota: Running command %s\n", syscmd));
lines = file_lines_pload(syscmd, NULL);
SAFE_FREE(syscmd);
if (lines) {
char *line = lines[0];
DEBUG (3, ("Read output from get_quota, \"%s\"\n", line));
/* we need to deal with long long unsigned here, if supported */
dp->qflags = strtoul(line, &p2, 10);
p = p2;
while (p && *p && isspace(*p)) {
p++;
}
if (p && *p) {
dp->curblocks = STR_TO_SMB_BIG_UINT(p, &p);
} else {
goto invalid_param;
}
while (p && *p && isspace(*p)) {
p++;
}
if (p && *p) {
dp->softlimit = STR_TO_SMB_BIG_UINT(p, &p);
} else {
goto invalid_param;
}
while (p && *p && isspace(*p)) {
p++;
}
if (p && *p) {
dp->hardlimit = STR_TO_SMB_BIG_UINT(p, &p);
} else {
goto invalid_param;
}
while (p && *p && isspace(*p)) {
p++;
}
if (p && *p) {
dp->curinodes = STR_TO_SMB_BIG_UINT(p, &p);
} else {
goto invalid_param;
}
while (p && *p && isspace(*p)) {
p++;
}
if (p && *p) {
dp->isoftlimit = STR_TO_SMB_BIG_UINT(p, &p);
} else {
goto invalid_param;
}
while (p && *p && isspace(*p)) {
p++;
}
if (p && *p) {
dp->ihardlimit = STR_TO_SMB_BIG_UINT(p, &p);
} else {
goto invalid_param;
}
while (p && *p && isspace(*p)) {
p++;
}
if (p && *p) {
dp->bsize = STR_TO_SMB_BIG_UINT(p, NULL);
} else {
dp->bsize = 1024;
}
TALLOC_FREE(lines);
lines = NULL;
DEBUG (3, ("Parsed output of get_quota, ...\n"));
DEBUGADD (5,(
"qflags:%u curblocks:%llu softlimit:%llu hardlimit:%llu\n"
"curinodes:%llu isoftlimit:%llu ihardlimit:%llu bsize:%llu\n",
dp->qflags,(long long unsigned)dp->curblocks,
(long long unsigned)dp->softlimit,(long long unsigned)dp->hardlimit,
(long long unsigned)dp->curinodes,
(long long unsigned)dp->isoftlimit,(long long unsigned)dp->ihardlimit,
(long long unsigned)dp->bsize));
return 0;
}
DEBUG (0, ("get_quota_command failed!\n"));
return -1;
}
errno = ENOSYS;
return -1;
invalid_param:
TALLOC_FREE(lines);
DEBUG(0,("The output of get_quota_command is invalid!\n"));
return -1;
}
static int command_set_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
{
const char *set_quota_command;
set_quota_command = lp_set_quota_command(talloc_tos());
if (set_quota_command && *set_quota_command) {
char **lines = NULL;
char *syscmd = NULL;
int _id = -1;
switch(qtype) {
case SMB_USER_QUOTA_TYPE:
case SMB_USER_FS_QUOTA_TYPE:
_id = id.uid;
break;
case SMB_GROUP_QUOTA_TYPE:
case SMB_GROUP_FS_QUOTA_TYPE:
_id = id.gid;
break;
default:
return -1;
}
if (asprintf(&syscmd,
"%s %s %d %d "
"%u %llu %llu "
"%llu %llu %llu ",
set_quota_command, path, qtype, _id, dp->qflags,
(long long unsigned)dp->softlimit,(long long unsigned)dp->hardlimit,
(long long unsigned)dp->isoftlimit,(long long unsigned)dp->ihardlimit,
(long long unsigned)dp->bsize) < 0) {
return -1;
}
DEBUG (3, ("get_quota: Running command %s\n", syscmd));
lines = file_lines_pload(syscmd, NULL);
SAFE_FREE(syscmd);
if (lines) {
char *line = lines[0];
DEBUG (3, ("Read output from set_quota, \"%s\"\n", line));
TALLOC_FREE(lines);
return 0;
}
DEBUG (0, ("set_quota_command failed!\n"));
return -1;
}
errno = ENOSYS;
return -1;
}
int sys_get_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
{
int ret = -1;
int i;
bool ready = False;
char *mntpath = NULL;
char *bdev = NULL;
char *fs = NULL;
if (!path||!dp)
smb_panic("sys_get_quota: called with NULL pointer");
if (command_get_quota(path, qtype, id, dp)==0) {
return 0;
} else if (errno != ENOSYS) {
return -1;
}
if ((ret=sys_path_to_bdev(path,&mntpath,&bdev,&fs))!=0) {
DEBUG(0,("sys_path_to_bdev() failed for path [%s]!\n",path));
return ret;
}
errno = 0;
DEBUG(10,("sys_get_quota() uid(%u, %u), fs(%s)\n", (unsigned)getuid(), (unsigned)geteuid(), fs));
for (i=0;(fs && sys_quota_backends[i].name && sys_quota_backends[i].get_quota);i++) {
if (strcmp(fs,sys_quota_backends[i].name)==0) {
ret = sys_quota_backends[i].get_quota(mntpath, bdev, qtype, id, dp);
if (ret!=0) {
DEBUG(3,("sys_get_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s.\n",
fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
} else {
DEBUG(10,("sys_get_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
}
ready = True;
break;
}
}
if (!ready) {
/* use the default vfs quota functions */
ret=sys_get_vfs_quota(mntpath, bdev, qtype, id, dp);
if (ret!=0) {
DEBUG(3,("sys_get_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s\n",
"vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
} else {
DEBUG(10,("sys_get_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
"vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
}
}
SAFE_FREE(mntpath);
SAFE_FREE(bdev);
SAFE_FREE(fs);
if ((ret!=0)&& (errno == EDQUOT)) {
DEBUG(10,("sys_get_quota() warning over quota!\n"));
return 0;
}
return ret;
}
int sys_set_quota(const char *path, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
{
int ret = -1;
int i;
bool ready = False;
char *mntpath = NULL;
char *bdev = NULL;
char *fs = NULL;
/* find the block device file */
if (!path||!dp)
smb_panic("get_smb_quota: called with NULL pointer");
if (command_set_quota(path, qtype, id, dp)==0) {
return 0;
} else if (errno != ENOSYS) {
return -1;
}
if ((ret=sys_path_to_bdev(path,&mntpath,&bdev,&fs))!=0) {
DEBUG(0,("sys_path_to_bdev() failed for path [%s]!\n",path));
return ret;
}
errno = 0;
DEBUG(10,("sys_set_quota() uid(%u, %u)\n", (unsigned)getuid(), (unsigned)geteuid()));
for (i=0;(fs && sys_quota_backends[i].name && sys_quota_backends[i].set_quota);i++) {
if (strcmp(fs,sys_quota_backends[i].name)==0) {
ret = sys_quota_backends[i].set_quota(mntpath, bdev, qtype, id, dp);
if (ret!=0) {
DEBUG(3,("sys_set_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s.\n",
fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
} else {
DEBUG(10,("sys_set_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
fs,mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
}
ready = True;
break;
}
}
if (!ready) {
/* use the default vfs quota functions */
ret=sys_set_vfs_quota(mntpath, bdev, qtype, id, dp);
if (ret!=0) {
DEBUG(3,("sys_set_%s_quota() failed for mntpath[%s] bdev[%s] qtype[%d] id[%d]: %s.\n",
"vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid),strerror(errno)));
} else {
DEBUG(10,("sys_set_%s_quota() called for mntpath[%s] bdev[%s] qtype[%d] id[%d].\n",
"vfs",mntpath,bdev,qtype,(qtype==SMB_GROUP_QUOTA_TYPE?id.gid:id.uid)));
}
}
SAFE_FREE(mntpath);
SAFE_FREE(bdev);
SAFE_FREE(fs);
if ((ret!=0)&& (errno == EDQUOT)) {
DEBUG(10,("sys_set_quota() warning over quota!\n"));
return 0;
}
return ret;
}
#else /* HAVE_SYS_QUOTAS */
void dummy_sysquotas_c(void);
void dummy_sysquotas_c(void)
{
return;
}
#endif /* HAVE_SYS_QUOTAS */