1 files changed, 207 insertions, 0 deletions
diff --git a/usr/src/uts/common/brand/lx/syscall/lx_sysinfo.c b/usr/src/uts/common/brand/lx/syscall/lx_sysinfo.c
new file mode 100644
index 0000000000..052ad322a7
--- /dev/null
+++ b/usr/src/uts/common/brand/lx/syscall/lx_sysinfo.c
@@ -0,0 +1,207 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ * Copyright 2017 Joyent, Inc.
+ */
+
+#include <vm/anon.h>
+#include <sys/systm.h>
+#include <sys/sysmacros.h>
+#include <sys/zone.h>
+#include <sys/time.h>
+
+typedef struct lx_sysinfo {
+	int64_t si_uptime;	/* Seconds since boot */
+	uint64_t si_loads[3];	/* 1, 5, and 15 minute avg runq length */
+	uint64_t si_totalram;	/* Total memory size */
+	uint64_t si_freeram;	/* Available memory */
+	uint64_t si_sharedram;	/* Shared memory */
+	uint64_t si_bufferram;	/* Buffer memory */
+	uint64_t si_totalswap;	/* Total swap space */
+	uint64_t si_freeswap;	/* Avail swap space */
+	uint16_t si_procs;	/* Process count */
+	uint16_t si_pad;	/* Padding */
+	uint64_t si_totalhigh;	/* High memory size */
+	uint64_t si_freehigh;	/* Avail high memory */
+	uint32_t si_mem_unit;	/* Unit size of memory fields */
+} lx_sysinfo_t;
+
+#if defined(_SYSCALL32_IMPL)
+/*
+ * 64-bit kernel view of the 32-bit usermode struct.
+ */
+#pragma pack(4)
+typedef struct lx_sysinfo32 {
+	int32_t si_uptime;	/* Seconds since boot */
+	uint32_t si_loads[3];	/* 1, 5, and 15 minute avg runq length */
+	uint32_t si_totalram;	/* Total memory size */
+	uint32_t si_freeram;	/* Available memory */
+	uint32_t si_sharedram;	/* Shared memory */
+	uint32_t si_bufferram;	/* Buffer memory */
+	uint32_t si_totalswap;	/* Total swap space */
+	uint32_t si_freeswap;	/* Avail swap space */
+	uint16_t si_procs;	/* Process count */
+	uint16_t si_pad;	/* Padding */
+	uint32_t si_totalhigh;	/* High memory size */
+	uint32_t si_freehigh;	/* Avail high memory */
+	uint32_t si_mem_unit;	/* Unit size of memory fields */
+	char __si_pad[8];
+} lx_sysinfo32_t;
+#pragma pack()
+#endif
+
+extern pgcnt_t swapfs_minfree;
+
+static void
+lx_sysinfo_common(lx_sysinfo_t *si)
+{
+	zone_t *zone = curzone;
+	pgcnt_t zphysmem, zfreemem;
+	ulong_t ztotswap, zfreeswap;
+
+	si->si_uptime = gethrestime_sec() - zone->zone_boot_time;
+
+	si->si_loads[0] = zone->zone_hp_avenrun[0];
+	si->si_loads[1] = zone->zone_hp_avenrun[1];
+	si->si_loads[2] = zone->zone_hp_avenrun[2];
+
+	/*
+	 * In linux each thread looks like a process, so we conflate the
+	 * two in this stat as well.
+	 */
+	si->si_procs = (int32_t)zone->zone_nlwps;
+
+	zone_get_physmem_data(zone->zone_id, &zphysmem, &zfreemem);
+
+	if (zone->zone_max_swap_ctl == UINT64_MAX) {
+		ztotswap = k_anoninfo.ani_max;
+		zfreeswap = k_anoninfo.ani_free;
+	} else {
+		/*
+		 * See the comment in swapctl for a description of how free is
+		 * calculated within a zone.
+		 */
+		rctl_qty_t used;
+		spgcnt_t avail;
+		uint64_t max;
+
+		avail = MAX((spgcnt_t)(availrmem - swapfs_minfree), 0);
+		max = k_anoninfo.ani_max + k_anoninfo.ani_mem_resv + avail;
+
+		mutex_enter(&zone->zone_mem_lock);
+		ztotswap = btop(zone->zone_max_swap_ctl);
+		used = btop(zone->zone_max_swap);
+		mutex_exit(&zone->zone_mem_lock);
+
+		zfreeswap = MIN(ztotswap, max) - used;
+	}
+
+	/*
+	 * If the maximum memory stat is less than 1^20 pages (i.e. 4GB),
+	 * then we report the result in bytes.  Otherwise we use pages.
+	 * Once we start supporting >1TB systems/zones, we'll need a third
+	 * option.
+	 */
+	if (MAX(zphysmem, ztotswap) < 1024 * 1024) {
+		si->si_totalram = ptob(zphysmem);
+		si->si_freeram = ptob(zfreemem);
+		si->si_totalswap = ptob(ztotswap);
+		si->si_freeswap = ptob(zfreeswap);
+		si->si_mem_unit = 1;
+	} else {
+		si->si_totalram = zphysmem;
+		si->si_freeram = zfreemem;
+		si->si_totalswap = ztotswap;
+		si->si_freeswap = zfreeswap;
+		si->si_mem_unit = PAGESIZE;
+	}
+	si->si_bufferram = 0;
+	si->si_sharedram = 0;
+
+	/*
+	 * These two stats refer to high physical memory.  If an
+	 * application running in a Linux zone cares about this, then
+	 * either it or we are broken.
+	 */
+	si->si_totalhigh = 0;
+	si->si_freehigh = 0;
+}
+
+long
+lx_sysinfo64(caddr_t sip)
+{
+	lx_sysinfo_t si;
+
+	bzero(&si, sizeof (si));
+	lx_sysinfo_common(&si);
+
+	if (copyout(&si, sip, sizeof (si)) != 0) {
+		return (set_errno(EFAULT));
+	}
+
+	return (0);
+}
+
+#if defined(_SYSCALL32_IMPL)
+long
+lx_sysinfo32(caddr_t sip)
+{
+	lx_sysinfo_t si;
+	lx_sysinfo32_t si32;
+	int i;
+
+	lx_sysinfo_common(&si);
+
+	/*
+	 * Convert the lx_sysinfo_t into the legacy 32-bit view:
+	 */
+	bzero(&si32, sizeof (si32));
+	si32.si_uptime = si.si_uptime;
+
+	for (i = 0; i < 3; i++) {
+		if ((si.si_loads[i]) > 0x7fffffff)
+			si32.si_loads[i] = 0x7fffffff;
+		else
+			si32.si_loads[i] = si.si_loads[i];
+	}
+
+	si32.si_procs = si.si_procs;
+	si32.si_totalram = si.si_totalram;
+	si32.si_freeram = si.si_freeram;
+	si32.si_totalswap = si.si_totalswap;
+	si32.si_freeswap = si.si_freeswap;
+	si32.si_mem_unit = si.si_mem_unit;
+
+	si32.si_bufferram = si.si_bufferram;
+	si32.si_sharedram = si.si_sharedram;
+
+	si32.si_totalhigh = si.si_totalhigh;
+	si32.si_freehigh = si.si_freehigh;
+
+	if (copyout(&si32, sip, sizeof (si32)) != 0) {
+		return (set_errno(EFAULT));
+	}
+
+	return (0);
+}
+#endif