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-rw-r--r--source3/smbd/quotas.c497
1 files changed, 497 insertions, 0 deletions
diff --git a/source3/smbd/quotas.c b/source3/smbd/quotas.c
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+++ b/source3/smbd/quotas.c
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+/*
+ Unix SMB/CIFS implementation.
+ support for quotas
+ Copyright (C) Andrew Tridgell 1992-1998
+
+ 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/>.
+*/
+
+
+/*
+ * This is one of the most system dependent parts of Samba, and its
+ * done a litle differently. Each system has its own way of doing
+ * things :-(
+ */
+
+#include "includes.h"
+#include "smbd/smbd.h"
+#include "system/filesys.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_QUOTA
+
+#ifndef HAVE_SYS_QUOTAS
+
+/* just a quick hack because sysquotas.h is included before linux/quota.h */
+#ifdef QUOTABLOCK_SIZE
+#undef QUOTABLOCK_SIZE
+#endif
+
+#ifdef WITH_QUOTAS
+
+#if defined(SUNOS5) /* Solaris */
+
+#include <fcntl.h>
+#include <sys/param.h>
+#include <sys/fs/ufs_quota.h>
+#include <sys/mnttab.h>
+#include <sys/mntent.h>
+
+/****************************************************************************
+ Allows querying of remote hosts for quotas on NFS mounted shares.
+ Supports normal NFS and AMD mounts.
+ Alan Romeril <a.romeril@ic.ac.uk> July 2K.
+****************************************************************************/
+
+#include <rpc/rpc.h>
+#include <rpc/types.h>
+#include <rpcsvc/rquota.h>
+#include <rpc/nettype.h>
+#include <rpc/xdr.h>
+
+static int my_xdr_getquota_rslt(XDR *xdrsp, struct getquota_rslt *gqr)
+{
+ int quotastat;
+
+ if (!xdr_int(xdrsp, &quotastat)) {
+ DEBUG(6,("nfs_quotas: Status bad or zero\n"));
+ return 0;
+ }
+ gqr->status = quotastat;
+
+ if (!xdr_int(xdrsp, &gqr->getquota_rslt_u.gqr_rquota.rq_bsize)) {
+ DEBUG(6,("nfs_quotas: Block size bad or zero\n"));
+ return 0;
+ }
+ if (!xdr_bool(xdrsp, &gqr->getquota_rslt_u.gqr_rquota.rq_active)) {
+ DEBUG(6,("nfs_quotas: Active bad or zero\n"));
+ return 0;
+ }
+ if (!xdr_int(xdrsp, &gqr->getquota_rslt_u.gqr_rquota.rq_bhardlimit)) {
+ DEBUG(6,("nfs_quotas: Hardlimit bad or zero\n"));
+ return 0;
+ }
+ if (!xdr_int(xdrsp, &gqr->getquota_rslt_u.gqr_rquota.rq_bsoftlimit)) {
+ DEBUG(6,("nfs_quotas: Softlimit bad or zero\n"));
+ return 0;
+ }
+ if (!xdr_int(xdrsp, &gqr->getquota_rslt_u.gqr_rquota.rq_curblocks)) {
+ DEBUG(6,("nfs_quotas: Currentblocks bad or zero\n"));
+ return 0;
+ }
+ return (1);
+}
+
+static int my_xdr_getquota_args(XDR *xdrsp, struct getquota_args *args)
+{
+ if (!xdr_string(xdrsp, &args->gqa_pathp, RQ_PATHLEN ))
+ return(0);
+ if (!xdr_int(xdrsp, &args->gqa_uid))
+ return(0);
+ return (1);
+}
+
+/* Restricted to SUNOS5 for the moment, I haven`t access to others to test. */
+static bool nfs_quotas(char *nfspath, uid_t euser_id, uint64_t *bsize, uint64_t *dfree, uint64_t *dsize)
+{
+ uid_t uid = euser_id;
+ struct dqblk D;
+ char *mnttype = nfspath;
+ CLIENT *clnt;
+ struct getquota_rslt gqr;
+ struct getquota_args args;
+ char *cutstr, *pathname, *host, *testpath;
+ int len;
+ static struct timeval timeout = {2,0};
+ enum clnt_stat clnt_stat;
+ bool ret = True;
+
+ *bsize = *dfree = *dsize = (uint64_t)0;
+
+ len=strcspn(mnttype, ":");
+ pathname=strstr(mnttype, ":");
+ cutstr = (char *) SMB_MALLOC(len+1);
+ if (!cutstr)
+ return False;
+
+ memset(cutstr, '\0', len+1);
+ host = strncat(cutstr,mnttype, sizeof(char) * len );
+ DEBUG(5,("nfs_quotas: looking for mount on \"%s\"\n", cutstr));
+ DEBUG(5,("nfs_quotas: of path \"%s\"\n", mnttype));
+ testpath=strchr_m(mnttype, ':');
+ args.gqa_pathp = testpath+1;
+ args.gqa_uid = uid;
+
+ DEBUG(5,("nfs_quotas: Asking for host \"%s\" rpcprog \"%i\" rpcvers \"%i\" network \"%s\"\n", host, RQUOTAPROG, RQUOTAVERS, "udp"));
+
+ if ((clnt = clnt_create(host, RQUOTAPROG, RQUOTAVERS, "udp")) == NULL) {
+ ret = False;
+ goto out;
+ }
+
+ clnt->cl_auth = authunix_create_default();
+ DEBUG(9,("nfs_quotas: auth_success\n"));
+
+ clnt_stat=clnt_call(clnt, RQUOTAPROC_GETQUOTA, my_xdr_getquota_args, (caddr_t)&args, my_xdr_getquota_rslt, (caddr_t)&gqr, timeout);
+
+ if (clnt_stat != RPC_SUCCESS) {
+ DEBUG(9,("nfs_quotas: clnt_call fail\n"));
+ ret = False;
+ goto out;
+ }
+
+ /*
+ * gqr.status returns 1 if quotas exist, 2 if there is
+ * no quota set, and 3 if no permission to get the quota.
+ * If 3, return something sensible.
+ */
+
+ switch (gqr.status) {
+ case 1:
+ DEBUG(9,("nfs_quotas: Good quota data\n"));
+ D.dqb_bsoftlimit = gqr.getquota_rslt_u.gqr_rquota.rq_bsoftlimit;
+ D.dqb_bhardlimit = gqr.getquota_rslt_u.gqr_rquota.rq_bhardlimit;
+ D.dqb_curblocks = gqr.getquota_rslt_u.gqr_rquota.rq_curblocks;
+ break;
+
+ case 2:
+ case 3:
+ D.dqb_bsoftlimit = 1;
+ D.dqb_curblocks = 1;
+ DEBUG(9,("nfs_quotas: Remote Quotas returned \"%i\" \n", gqr.status));
+ break;
+
+ default:
+ DEBUG(9, ("nfs_quotas: Unknown Remote Quota Status \"%i\"\n",
+ gqr.status));
+ ret = false;
+ goto out;
+ }
+
+ DEBUG(10,("nfs_quotas: Let`s look at D a bit closer... status \"%i\" bsize \"%i\" active? \"%i\" bhard \"%i\" bsoft \"%i\" curb \"%i\" \n",
+ gqr.status,
+ gqr.getquota_rslt_u.gqr_rquota.rq_bsize,
+ gqr.getquota_rslt_u.gqr_rquota.rq_active,
+ gqr.getquota_rslt_u.gqr_rquota.rq_bhardlimit,
+ gqr.getquota_rslt_u.gqr_rquota.rq_bsoftlimit,
+ gqr.getquota_rslt_u.gqr_rquota.rq_curblocks));
+
+ *bsize = gqr.getquota_rslt_u.gqr_rquota.rq_bsize;
+ *dsize = D.dqb_bsoftlimit;
+
+ if (D.dqb_curblocks > D.dqb_bsoftlimit) {
+ *dfree = 0;
+ *dsize = D.dqb_curblocks;
+ } else
+ *dfree = D.dqb_bsoftlimit - D.dqb_curblocks;
+
+ out:
+
+ if (clnt) {
+ if (clnt->cl_auth)
+ auth_destroy(clnt->cl_auth);
+ clnt_destroy(clnt);
+ }
+
+ DEBUG(5,("nfs_quotas: For path \"%s\" returning bsize %.0f, dfree %.0f, dsize %.0f\n",args.gqa_pathp,(double)*bsize,(double)*dfree,(double)*dsize));
+
+ SAFE_FREE(cutstr);
+ DEBUG(10,("nfs_quotas: End of nfs_quotas\n" ));
+ return ret;
+}
+
+/****************************************************************************
+try to get the disk space from disk quotas (SunOS & Solaris2 version)
+Quota code by Peter Urbanec (amiga@cse.unsw.edu.au).
+****************************************************************************/
+
+bool disk_quotas(connection_struct *conn, struct smb_filename *fname,
+ uint64_t *bsize, uint64_t *dfree, uint64_t *dsize)
+{
+ uid_t euser_id;
+ int ret;
+ struct dqblk D;
+ struct quotctl command;
+ int file;
+ struct mnttab mnt;
+ char *name = NULL;
+ FILE *fd;
+ SMB_STRUCT_STAT sbuf;
+ SMB_DEV_T devno;
+ bool found = false;
+ const char *path = fname->base_name;
+
+ euser_id = geteuid();
+
+ devno = fname->st.st_ex_dev;
+ DEBUG(5,("disk_quotas: looking for path \"%s\" devno=%x\n",
+ path, (unsigned int)devno));
+ if ((fd = fopen(MNTTAB, "r")) == NULL) {
+ return false;
+ }
+
+ while (getmntent(fd, &mnt) == 0) {
+ if (sys_stat(mnt.mnt_mountp, &sbuf, false) == -1) {
+ continue;
+ }
+
+ DEBUG(5,("disk_quotas: testing \"%s\" devno=%x\n",
+ mnt.mnt_mountp, (unsigned int)devno));
+
+ /* quotas are only on vxfs, UFS or NFS */
+ if ((sbuf.st_ex_dev == devno) && (
+ strcmp( mnt.mnt_fstype, MNTTYPE_UFS ) == 0 ||
+ strcmp( mnt.mnt_fstype, "nfs" ) == 0 ||
+ strcmp( mnt.mnt_fstype, "vxfs" ) == 0 )) {
+ found = true;
+ name = talloc_asprintf(talloc_tos(),
+ "%s/quotas",
+ mnt.mnt_mountp);
+ break;
+ }
+ }
+
+ fclose(fd);
+ if (!found) {
+ return false;
+ }
+
+ if (!name) {
+ return false;
+ }
+ become_root();
+
+ if (strcmp(mnt.mnt_fstype, "nfs") == 0) {
+ bool retval;
+ DEBUG(5,("disk_quotas: looking for mountpath (NFS) \"%s\"\n",
+ mnt.mnt_special));
+ retval = nfs_quotas(mnt.mnt_special,
+ euser_id, bsize, dfree, dsize);
+ unbecome_root();
+ return retval;
+ }
+
+ DEBUG(5,("disk_quotas: looking for quotas file \"%s\"\n", name));
+ if((file=open(name, O_RDONLY,0))<0) {
+ unbecome_root();
+ return false;
+ }
+ command.op = Q_GETQUOTA;
+ command.uid = euser_id;
+ command.addr = (caddr_t) &D;
+ ret = ioctl(file, Q_QUOTACTL, &command);
+ close(file);
+
+ unbecome_root();
+
+ if (ret < 0) {
+ DEBUG(5,("disk_quotas ioctl (Solaris) failed. Error = %s\n",
+ strerror(errno) ));
+
+ return false;
+ }
+
+ /* If softlimit is zero, set it equal to hardlimit.
+ */
+
+ if (D.dqb_bsoftlimit==0) {
+ D.dqb_bsoftlimit = D.dqb_bhardlimit;
+ }
+
+ /* Use softlimit to determine disk space. A user exceeding the quota
+ * is told that there's no space left. Writes might actually work for
+ * a bit if the hardlimit is set higher than softlimit. Effectively
+ * the disk becomes made of rubber latex and begins to expand to
+ * accommodate the user :-)
+ */
+
+ if (D.dqb_bsoftlimit==0)
+ return(False);
+ *bsize = DEV_BSIZE;
+ *dsize = D.dqb_bsoftlimit;
+
+ if (D.dqb_curblocks > D.dqb_bsoftlimit) {
+ *dfree = 0;
+ *dsize = D.dqb_curblocks;
+ } else {
+ *dfree = D.dqb_bsoftlimit - D.dqb_curblocks;
+ }
+
+ DEBUG(5,("disk_quotas for path \"%s\" returning "
+ "bsize %.0f, dfree %.0f, dsize %.0f\n",
+ path,(double)*bsize,(double)*dfree,(double)*dsize));
+
+ return true;
+}
+
+#endif /* Solaris */
+
+#else /* WITH_QUOTAS */
+
+bool disk_quotas(connection_struct *conn, struct smb_filename *fname,
+ uint64_t *bsize, uint64_t *dfree, uint64_t *dsize)
+{
+ (*bsize) = 512; /* This value should be ignored */
+
+ /* And just to be sure we set some values that hopefully */
+ /* will be larger that any possible real-world value */
+ (*dfree) = (uint64_t)-1;
+ (*dsize) = (uint64_t)-1;
+
+ /* As we have select not to use quotas, allways fail */
+ return false;
+}
+#endif /* WITH_QUOTAS */
+
+#else /* HAVE_SYS_QUOTAS */
+/* wrapper to the new sys_quota interface
+ this file should be removed later
+ */
+bool disk_quotas(connection_struct *conn, struct smb_filename *fname,
+ uint64_t *bsize, uint64_t *dfree, uint64_t *dsize)
+{
+ int r;
+ SMB_DISK_QUOTA D;
+ unid_t id;
+
+ /*
+ * First of all, check whether user quota is
+ * enforced. If the call fails, assume it is
+ * not enforced.
+ */
+ ZERO_STRUCT(D);
+ id.uid = -1;
+ r = SMB_VFS_GET_QUOTA(conn, fname, SMB_USER_FS_QUOTA_TYPE,
+ id, &D);
+ if (r == -1 && errno != ENOSYS) {
+ goto try_group_quota;
+ }
+ if (r == 0 && (D.qflags & QUOTAS_DENY_DISK) == 0) {
+ goto try_group_quota;
+ }
+
+ ZERO_STRUCT(D);
+ id.uid = geteuid();
+
+ /* if new files created under this folder get this
+ * folder's UID, then available space is governed by
+ * the quota of the folder's UID, not the creating user.
+ */
+ if (lp_inherit_owner(SNUM(conn)) != INHERIT_OWNER_NO &&
+ id.uid != fname->st.st_ex_uid && id.uid != sec_initial_uid()) {
+ int save_errno;
+
+ id.uid = fname->st.st_ex_uid;
+ become_root();
+ r = SMB_VFS_GET_QUOTA(conn, fname,
+ SMB_USER_QUOTA_TYPE, id, &D);
+ save_errno = errno;
+ unbecome_root();
+ errno = save_errno;
+ } else {
+ r = SMB_VFS_GET_QUOTA(conn, fname,
+ SMB_USER_QUOTA_TYPE, id, &D);
+ }
+
+ if (r == -1) {
+ goto try_group_quota;
+ }
+
+ *bsize = D.bsize;
+ /* Use softlimit to determine disk space, except when it has been exceeded */
+ if (
+ (D.softlimit && D.curblocks >= D.softlimit) ||
+ (D.hardlimit && D.curblocks >= D.hardlimit) ||
+ (D.isoftlimit && D.curinodes >= D.isoftlimit) ||
+ (D.ihardlimit && D.curinodes>=D.ihardlimit)
+ ) {
+ *dfree = 0;
+ *dsize = D.curblocks;
+ } else if (D.softlimit==0 && D.hardlimit==0) {
+ goto try_group_quota;
+ } else {
+ if (D.softlimit == 0) {
+ D.softlimit = D.hardlimit;
+ }
+ *dfree = D.softlimit - D.curblocks;
+ *dsize = D.softlimit;
+ }
+
+ return True;
+
+try_group_quota:
+ /*
+ * First of all, check whether group quota is
+ * enforced. If the call fails, assume it is
+ * not enforced.
+ */
+ ZERO_STRUCT(D);
+ id.gid = -1;
+ r = SMB_VFS_GET_QUOTA(conn, fname, SMB_GROUP_FS_QUOTA_TYPE,
+ id, &D);
+ if (r == -1 && errno != ENOSYS) {
+ return false;
+ }
+ if (r == 0 && (D.qflags & QUOTAS_DENY_DISK) == 0) {
+ return false;
+ }
+
+ ZERO_STRUCT(D);
+
+ /*
+ * If new files created under this folder get this folder's
+ * GID, then available space is governed by the quota of the
+ * folder's GID, not the primary group of the creating user.
+ */
+ if (VALID_STAT(fname->st) &&
+ S_ISDIR(fname->st.st_ex_mode) &&
+ fname->st.st_ex_mode & S_ISGID) {
+ id.gid = fname->st.st_ex_gid;
+ become_root();
+ r = SMB_VFS_GET_QUOTA(conn, fname, SMB_GROUP_QUOTA_TYPE, id,
+ &D);
+ unbecome_root();
+ } else {
+ id.gid = getegid();
+ r = SMB_VFS_GET_QUOTA(conn, fname, SMB_GROUP_QUOTA_TYPE, id,
+ &D);
+ }
+
+ if (r == -1) {
+ return False;
+ }
+
+ *bsize = D.bsize;
+ /* Use softlimit to determine disk space, except when it has been exceeded */
+ if (
+ (D.softlimit && D.curblocks >= D.softlimit) ||
+ (D.hardlimit && D.curblocks >= D.hardlimit) ||
+ (D.isoftlimit && D.curinodes >= D.isoftlimit) ||
+ (D.ihardlimit && D.curinodes>=D.ihardlimit)
+ ) {
+ *dfree = 0;
+ *dsize = D.curblocks;
+ } else if (D.softlimit==0 && D.hardlimit==0) {
+ return False;
+ } else {
+ if (D.softlimit == 0) {
+ D.softlimit = D.hardlimit;
+ }
+ *dfree = D.softlimit - D.curblocks;
+ *dsize = D.softlimit;
+ }
+
+ return (True);
+}
+#endif /* HAVE_SYS_QUOTAS */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 04:05:45 +0000