add sysquotas_jfs2.c

Signed-off-by: Bjoern Jacke <bjacke@samba.org>
Reviewed-by: Uri Simchoni <uri@samba.org>

2 files changed, 153 insertions, 0 deletions

diff --git a/source3/lib/sysquotas.c b/source3/lib/sysquotas.c
index 9b2d37b8375..40b421c056f 100644
--- a/source3/lib/sysquotas.c
+++ b/source3/lib/sysquotas.c
@@ -227,6 +227,9 @@ static struct {
 	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[] = {
+#ifdef HAVE_JFS_QUOTA_H
+	{"jfs2", sys_get_jfs2_quota, 	sys_set_jfs2_quota},
+#endif
 #if defined HAVE_XFS_QUOTAS
 	{"xfs", sys_get_xfs_quota, 	sys_set_xfs_quota},
 	{"gfs", sys_get_xfs_quota, 	sys_set_xfs_quota},
diff --git a/source3/lib/sysquotas_jfs2.c b/source3/lib/sysquotas_jfs2.c
new file mode 100644
index 00000000000..999b7e08941
--- /dev/null
+++ b/source3/lib/sysquotas_jfs2.c
@@ -0,0 +1,150 @@
+/*
+ * Unix SMB/CIFS implementation.
+ * System QUOTA function wrappers for JFS2 on AIX
+
+ * Copyright (C) 2019 Bjoern Jacke
+ *
+ * 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
+
+#if defined(HAVE_JFS_QUOTA_H)
+#include <jfs/quota.h>
+
+#if defined(Q_J2GETQUOTA) /* when have JFS2 */
+
+/* int quotactl(const char *path, int cmd, int id, char *addr)
+ *
+ * This is very similar to sysquotas_4B but JFS2 has different quota cmds
+ * (why?) and for some reason wants root even for querying your own quota,
+ * which seems to be an AIX bug because the docs say root is only
+ * required for querying other users' quota
+ */
+
+
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#ifdef HAVE_JFS_QUOTA_H
+#include <jfs/quota.h>
+#endif
+
+
+static int sys_quotactl_JFS2(const char * path, int cmd,
+		int id, quota64_t *quota)
+{
+	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_J2GETQUOTA, 0)) ? "getting" : "setting",
+		    (cmd & QCMD(0, GRPQUOTA)) ? "group" : "user",
+		    (unsigned)id, path));
+
+	become_root();
+
+	ret = quotactl((char *) path, cmd, id, (char *) quota);
+	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(0, ("failed to %s quota for %s ID %u on %s: %s\n",
+				    (cmd & QCMD(Q_J2GETQUOTA, 0)) ? "get" : "set",
+				    (cmd & QCMD(0, GRPQUOTA)) ? "group" : "user",
+				    (unsigned)id, path, strerror(errno)));
+		}
+	}
+
+	unbecome_root();
+
+	return ret;
+}
+
+
+int sys_get_jfs2_quota(const char *path, const char *bdev,
+	enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
+{
+	int ret;
+	quota64_t quota;
+
+	ZERO_STRUCT(quota);
+
+	switch (qtype) {
+	case SMB_USER_QUOTA_TYPE:
+		/* Get quota for provided UID. */
+		ret = sys_quotactl_JFS2(path, QCMD(Q_J2GETQUOTA, USRQUOTA),
+					id.uid, &quota);
+		break;
+	case SMB_USER_FS_QUOTA_TYPE:
+		/* Get quota for current UID. */
+		ret = sys_quotactl_JFS2(path, QCMD(Q_J2GETQUOTA, USRQUOTA),
+					geteuid(), &quota);
+		break;
+	case SMB_GROUP_QUOTA_TYPE:
+		/* Get quota for provided GID. */
+		ret = sys_quotactl_JFS2(path, QCMD(Q_J2GETQUOTA, GRPQUOTA),
+					id.gid, &quota);
+		break;
+	case SMB_GROUP_FS_QUOTA_TYPE:
+		/* Get quota for current GID. */
+		ret = sys_quotactl_JFS2(path, QCMD(Q_J2GETQUOTA, GRPQUOTA),
+					getegid(), &quota);
+		break;
+	default:
+		DEBUG(0, ("cannot get unsupported quota type: %u\n",
+			    (unsigned)qtype));
+		errno = ENOSYS;
+		return -1;
+	}
+
+	if (ret == -1) {
+		return -1;
+	}
+
+	dp->softlimit = quota.bsoft;
+	dp->hardlimit = quota.bhard;
+	dp->ihardlimit = quota.ihard;
+	dp->isoftlimit = quota.isoft;
+	dp->curinodes = quota.iused;
+	dp->curblocks = quota.bused;
+
+	dp->qflags = QUOTAS_ENABLED | QUOTAS_DENY_DISK;
+	dp->qtype = qtype;
+	dp->bsize = QUOTABLOCK_SIZE;
+
+	return ret;
+}
+
+int sys_set_jfs2_quota(const char *path, const char *bdev,
+	enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
+{
+	/* JFS2 supports fancy quota limit classes for setting user quota.
+	 * Unfortunately, this makes them quite unmanagable for Samba.
+	 */
+	DEBUG(1, ("cannot set quota on JFS2!\n"));
+	errno = ENOSYS;
+	return -1;
+}
+
+
+#endif /* JFS2 */
+#endif /* AIX quotas */