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Diffstat (limited to 'source3/lib/sysquotas_4B.c')
| -rw-r--r-- | source3/lib/sysquotas_4B.c | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/source3/lib/sysquotas_4B.c b/source3/lib/sysquotas_4B.c new file mode 100644 index 0000000..d9beb92 --- /dev/null +++ b/source3/lib/sysquotas_4B.c @@ -0,0 +1,243 @@ +/* + * Unix SMB/CIFS implementation. + * System QUOTA function wrappers for QUOTACTL_4B + + * Copyright (C) 2011 James Peach. + * + * 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 "includes.h" + +#undef DBGC_CLASS +#define DBGC_CLASS DBGC_QUOTA + +#ifndef HAVE_SYS_QUOTAS +#undef HAVE_QUOTACTL_4B +#endif + +#ifdef HAVE_QUOTACTL_4B +/* int quotactl(const char *path, int cmd, int id, char *addr) + * + * This is used by many (all?) BSD-derived systems. This implementation has + * been developed and tested on Darwin, but may also work on other BSD systems. + */ + +#ifdef HAVE_SYS_TYPES_H +#include <sys/types.h> +#endif + +#ifdef HAVE_SYS_QUOTA_H +#include <sys/quota.h> +#endif + +#ifdef HAVE_UFS_UFS_QUOTA_H +#include <ufs/ufs/quota.h> +#endif + +#ifdef HAVE_JFS_QUOTA_H +#include <jfs/quota.h> +#endif + +#if defined(DARWINOS) +/* WorkARound broken HFS access checks in hfs_quotactl. Darwin only(?) */ +#define HFS_QUOTACTL_WAR 1 +#endif + +#ifdef HAVE_STRUCT_DQBLK_DQB_CURBYTES +/* we handle the byte vs. block count dynamically via QUOTABLOCK_SIZE 1 */ +#define dqb_curblocks dqb_curbytes +#endif + +static void xlate_qblk_to_smb(const struct dqblk * const qblk, + SMB_DISK_QUOTA *dp) +{ + ZERO_STRUCTP(dp); + + DEBUG(10, ("unix softlimit=%u hardlimit=%u curblock=%u\n", + (unsigned)qblk->dqb_bsoftlimit, (unsigned)qblk->dqb_bhardlimit, + (unsigned)qblk->dqb_curblocks)); + + DEBUGADD(10, ("unix softinodes=%u hardinodes=%u curinodes=%u\n", + (unsigned)qblk->dqb_isoftlimit, (unsigned)qblk->dqb_ihardlimit, + (unsigned)qblk->dqb_curinodes)); + + dp->bsize = QUOTABLOCK_SIZE; + + dp->softlimit = qblk->dqb_bsoftlimit; + dp->hardlimit = qblk->dqb_bhardlimit; + dp->curblocks = qblk->dqb_curblocks; +/* our Darwin quotas used to never return 0byte usage but this is probably not needed, + * let's comment this out for now +#ifdef HAVE_STRUCT_DQBLK_DQB_CURBYTES + if (dp->curblocks == 0) { + dp->curblocks = 1; + } +#endif + */ + + dp->ihardlimit = qblk->dqb_ihardlimit; + dp->isoftlimit = qblk->dqb_isoftlimit; + dp->curinodes = qblk->dqb_curinodes; + + dp->qflags = QUOTAS_ENABLED | QUOTAS_DENY_DISK; + + DEBUG(10, ("softlimit=%u hardlimit=%u curblock=%u\n", + (unsigned)dp->softlimit, (unsigned)dp->hardlimit, + (unsigned)dp->curblocks)); + + DEBUGADD(10, ("softinodes=%u hardinodes=%u curinodes=%u\n", + (unsigned)dp->isoftlimit, (unsigned)dp->ihardlimit, + (unsigned)dp->curinodes)); + +} + +static void xlate_smb_to_qblk(const SMB_DISK_QUOTA * const dp, + struct dqblk *qblk) +{ + ZERO_STRUCTP(qblk); + + if (dp->bsize == QUOTABLOCK_SIZE) { + qblk->dqb_bsoftlimit = dp->softlimit; + qblk->dqb_bhardlimit = dp->hardlimit; + } else { + qblk->dqb_bsoftlimit = dp->softlimit * dp->bsize / QUOTABLOCK_SIZE; + qblk->dqb_bhardlimit = dp->hardlimit * dp->bsize / QUOTABLOCK_SIZE; + } + qblk->dqb_ihardlimit = dp->ihardlimit; + qblk->dqb_isoftlimit = dp->isoftlimit; +} + +static int sys_quotactl_4B(const char * path, int cmd, + int id, struct dqblk *qblk) +{ + int ret; + + /* NB: We must test GRPQUOTA here, because USRQUOTA is 0. */ + DEBUG(10, ("%s quota for %s ID %u on %s\n", + (cmd & QCMD(Q_GETQUOTA, 0)) ? "getting" : "setting", + (cmd & QCMD(0, GRPQUOTA)) ? "group" : "user", + (unsigned)id, path)); + +#ifdef HFS_QUOTACTL_WAR + become_root(); +#endif /* HFS_QUOTACTL_WAR */ + + ret = quotactl(path, cmd, id, qblk); + if (ret == -1) { + /* ENOTSUP means quota support is not compiled in. EINVAL + * means that quotas are not configured (commonly). + */ + if (errno != ENOTSUP && errno != EINVAL) { + DEBUG(5, ("failed to %s quota for %s ID %u on %s: %s\n", + (cmd & QCMD(Q_GETQUOTA, 0)) ? "get" : "set", + (cmd & QCMD(0, GRPQUOTA)) ? "group" : "user", + (unsigned)id, path, strerror(errno))); + } + +#ifdef HFS_QUOTACTL_WAR + unbecome_root(); +#endif /* HFS_QUOTACTL_WAR */ + + + return -1; + } + +#ifdef HFS_QUOTACTL_WAR + unbecome_root(); +#endif /* HFS_QUOTACTL_WAR */ + + return 0; +} + +int sys_get_vfs_quota(const char *path, const char *bdev, + enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp) +{ + int ret; + struct dqblk qblk; + + ZERO_STRUCT(qblk); + + switch (qtype) { + case SMB_USER_QUOTA_TYPE: + /* Get quota for provided UID. */ + ret = sys_quotactl_4B(path, QCMD(Q_GETQUOTA, USRQUOTA), + id.uid, &qblk); + break; + case SMB_USER_FS_QUOTA_TYPE: + /* Get quota for current UID. */ + ret = sys_quotactl_4B(path, QCMD(Q_GETQUOTA, USRQUOTA), + geteuid(), &qblk); + break; + case SMB_GROUP_QUOTA_TYPE: + /* Get quota for provided GID. */ + ret = sys_quotactl_4B(path, QCMD(Q_GETQUOTA, GRPQUOTA), + id.gid, &qblk); + break; + case SMB_GROUP_FS_QUOTA_TYPE: + /* Get quota for current GID. */ + ret = sys_quotactl_4B(path, QCMD(Q_GETQUOTA, GRPQUOTA), + getegid(), &qblk); + break; + default: + DEBUG(0, ("cannot get unsupported quota type: %u\n", + (unsigned)qtype)); + errno = ENOSYS; + return -1; + } + + if (ret == -1) { + return -1; + } + + xlate_qblk_to_smb(&qblk, dp); + dp->qtype = qtype; + + return ret; +} + +int sys_set_vfs_quota(const char *path, const char *bdev, + enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp) +{ + struct dqblk qblk; + + xlate_smb_to_qblk(dp, &qblk); + + switch (qtype) { + case SMB_USER_QUOTA_TYPE: + /* Set quota for provided UID. */ + return sys_quotactl_4B(path, QCMD(Q_SETQUOTA, USRQUOTA), + id.uid, &qblk); + case SMB_USER_FS_QUOTA_TYPE: + /* Set quota for current UID. */ + return sys_quotactl_4B(path, QCMD(Q_SETQUOTA, USRQUOTA), + geteuid(), &qblk); + case SMB_GROUP_QUOTA_TYPE: + /* Set quota for provided GID. */ + return sys_quotactl_4B(path, QCMD(Q_SETQUOTA, GRPQUOTA), + id.gid, &qblk); + case SMB_GROUP_FS_QUOTA_TYPE: + /* Set quota for current GID. */ + return sys_quotactl_4B(path, QCMD(Q_SETQUOTA, GRPQUOTA), + getegid(), &qblk); + default: + DEBUG(0, ("cannot set unsupported quota type: %u\n", + (unsigned)qtype)); + errno = ENOSYS; + return -1; + } +} + +#endif /* HAVE_QUOTACTL_4B */ |