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/*
* Implementation of communication with kernel generic interface
*
* Jan Kara <jack@suse.cz> - sponsored by SuSE CR
*/
#include "config.h"
#include <errno.h>
#include <string.h>
#include <pwd.h>
#include <grp.h>
#include <stdlib.h>
#include <sys/types.h>
#include "pot.h"
#include "common.h"
#include "quotaio.h"
#include "quota.h"
#include "quotasys.h"
/* Convert kernel quotablock format to utility one */
static inline void generic_kern2utildqblk(struct util_dqblk *u, struct if_dqblk *k)
{
u->dqb_ihardlimit = k->dqb_ihardlimit;
u->dqb_isoftlimit = k->dqb_isoftlimit;
u->dqb_bhardlimit = k->dqb_bhardlimit;
u->dqb_bsoftlimit = k->dqb_bsoftlimit;
u->dqb_curinodes = k->dqb_curinodes;
u->dqb_curspace = k->dqb_curspace;
u->dqb_itime = k->dqb_itime;
u->dqb_btime = k->dqb_btime;
}
/* Convert utility quotablock format to kernel one */
static inline void generic_util2kerndqblk(struct if_dqblk *k, struct util_dqblk *u)
{
k->dqb_ihardlimit = u->dqb_ihardlimit;
k->dqb_isoftlimit = u->dqb_isoftlimit;
k->dqb_bhardlimit = u->dqb_bhardlimit;
k->dqb_bsoftlimit = u->dqb_bsoftlimit;
k->dqb_curinodes = u->dqb_curinodes;
k->dqb_curspace = u->dqb_curspace;
k->dqb_itime = u->dqb_itime;
k->dqb_btime = u->dqb_btime;
}
/* Get info from kernel to handle */
int vfs_get_info(struct quota_handle *h)
{
struct if_dqinfo kinfo;
if (quotactl(QCMD(Q_GETINFO, h->qh_type), h->qh_quotadev, 0, (void *)&kinfo) < 0) {
errstr(_("Cannot get info for %s quota file from kernel on %s: %s\n"), type2name(h->qh_type), h->qh_quotadev, strerror(errno));
return -1;
}
h->qh_info.dqi_bgrace = kinfo.dqi_bgrace;
h->qh_info.dqi_igrace = kinfo.dqi_igrace;
return 0;
}
/* Set info in kernel from handle */
int vfs_set_info(struct quota_handle *h, int flags)
{
struct if_dqinfo kinfo;
kinfo.dqi_bgrace = h->qh_info.dqi_bgrace;
kinfo.dqi_igrace = h->qh_info.dqi_igrace;
kinfo.dqi_valid = flags;
if (quotactl(QCMD(Q_SETINFO, h->qh_type), h->qh_quotadev, 0, (void *)&kinfo) < 0) {
errstr(_("Cannot set info for %s quota file from kernel on %s: %s\n"), type2name(h->qh_type), h->qh_quotadev, strerror(errno));
return -1;
}
return 0;
}
/* Get dquot from kernel */
int vfs_get_dquot(struct dquot *dquot)
{
struct if_dqblk kdqblk;
if (quotactl(QCMD(Q_GETQUOTA, dquot->dq_h->qh_type), dquot->dq_h->qh_quotadev, dquot->dq_id, (void *)&kdqblk) < 0) {
errstr(_("Cannot get quota for %s %d from kernel on %s: %s\n"), type2name(dquot->dq_h->qh_type), dquot->dq_id, dquot->dq_h->qh_quotadev, strerror(errno));
return -1;
}
generic_kern2utildqblk(&dquot->dq_dqb, &kdqblk);
return 0;
}
/* Set dquot in kernel */
int vfs_set_dquot(struct dquot *dquot, int flags)
{
struct if_dqblk kdqblk;
generic_util2kerndqblk(&kdqblk, &dquot->dq_dqb);
kdqblk.dqb_valid = flags;
if (quotactl(QCMD(Q_SETQUOTA, dquot->dq_h->qh_type), dquot->dq_h->qh_quotadev, dquot->dq_id, (void *)&kdqblk) < 0) {
errstr(_("Cannot set quota for %s %d from kernel on %s: %s\n"), type2name(dquot->dq_h->qh_type), dquot->dq_id, dquot->dq_h->qh_quotadev, strerror(errno));
return -1;
}
return 0;
}
static int scan_one_dquot(struct dquot *dquot, int (*get_dquot)(struct dquot *))
{
int ret;
struct util_dqblk *dqb = &dquot->dq_dqb;
memset(dqb, 0, sizeof(struct util_dqblk));
ret = get_dquot(dquot);
if (ret < 0)
return ret;
if (!dqb->dqb_bhardlimit && !dqb->dqb_bsoftlimit && !dqb->dqb_ihardlimit && !dqb->dqb_isoftlimit && !dqb->dqb_curinodes && !dqb->dqb_curspace)
return 1;
return 0;
}
/* Generic quota scanning using passwd... */
int generic_scan_dquots(struct quota_handle *h,
int (*process_dquot)(struct dquot *dquot, char *dqname),
int (*get_dquot)(struct dquot *dquot))
{
struct dquot *dquot = get_empty_dquot();
int ret = 0;
dquot->dq_h = h;
if (h->qh_type == USRQUOTA) {
struct passwd *usr;
setpwent();
while ((usr = getpwent()) != NULL) {
dquot->dq_id = usr->pw_uid;
ret = scan_one_dquot(dquot, get_dquot);
if (ret < 0)
break;
if (ret > 0)
continue;
ret = process_dquot(dquot, usr->pw_name);
if (ret < 0)
break;
}
endpwent();
} else if (h->qh_type == GRPQUOTA) {
struct group *grp;
setgrent();
while ((grp = getgrent()) != NULL) {
dquot->dq_id = grp->gr_gid;
ret = scan_one_dquot(dquot, get_dquot);
if (ret < 0)
break;
if (ret > 0)
continue;
ret = process_dquot(dquot, grp->gr_name);
if (ret < 0)
break;
}
endgrent();
} else if (h->qh_type == PRJQUOTA) {
struct fs_project *prj;
setprent();
while ((prj = getprent()) != NULL) {
dquot->dq_id = prj->pr_id;
ret = scan_one_dquot(dquot, get_dquot);
if (ret < 0)
break;
if (ret > 0)
continue;
ret = process_dquot(dquot, prj->pr_name);
if (ret < 0)
break;
}
endprent();
}
free(dquot);
return ret;
}
int vfs_scan_dquots(struct quota_handle *h,
int (*process_dquot)(struct dquot *dquot, char *dqname))
{
struct dquot *dquot = get_empty_dquot();
qid_t id = 0;
struct if_nextdqblk kdqblk;
int ret;
dquot->dq_h = h;
while (1) {
ret = quotactl(QCMD(Q_GETNEXTQUOTA, h->qh_type),
h->qh_quotadev, id, (void *)&kdqblk);
if (ret < 0)
break;
/*
* This is a slight hack but we know struct if_dqblk is a
* subset of struct if_nextdqblk
*/
generic_kern2utildqblk(&dquot->dq_dqb,
(struct if_dqblk *)&kdqblk);
dquot->dq_id = kdqblk.dqb_id;
ret = process_dquot(dquot, NULL);
if (ret < 0)
break;
id = kdqblk.dqb_id + 1;
/* id -1 is invalid and the last one... */
if (id == -1) {
errno = ENOENT;
break;
}
}
free(dquot);
if (errno == ENOENT)
return 0;
return ret;
}
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