Initial import

3 files changed, 1076 insertions, 0 deletions

diff --git a/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c b/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
new file mode 100644
index 000000000..06944b863
--- /dev/null
+++ b/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
@@ -0,0 +1,449 @@
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * 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 version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/obdclass/linux/linux-module.c
+ *
+ * Object Devices Class Driver
+ * These are the only exported functions, they provide some generic
+ * infrastructure for managing object devices
+ */
+
+#define DEBUG_SUBSYSTEM S_CLASS
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/sched.h>
+#include <linux/lp.h>
+#include <linux/slab.h>
+#include <linux/ioport.h>
+#include <linux/fcntl.h>
+#include <linux/delay.h>
+#include <linux/skbuff.h>
+#include <linux/proc_fs.h>
+#include <linux/fs.h>
+#include <linux/poll.h>
+#include <linux/list.h>
+#include <linux/highmem.h>
+#include <linux/io.h>
+#include <asm/ioctls.h>
+#include <linux/poll.h>
+#include <linux/uaccess.h>
+#include <linux/miscdevice.h>
+#include <linux/seq_file.h>
+
+#include "../../../include/linux/libcfs/libcfs.h"
+#include "../../../include/linux/lnet/lnetctl.h"
+#include "../../include/obd_support.h"
+#include "../../include/obd_class.h"
+#include "../../include/lprocfs_status.h"
+#include "../../include/lustre_ver.h"
+#include "../../include/lustre/lustre_build_version.h"
+
+int proc_version;
+
+/* buffer MUST be at least the size of obd_ioctl_hdr */
+int obd_ioctl_getdata(char **buf, int *len, void *arg)
+{
+	struct obd_ioctl_hdr hdr;
+	struct obd_ioctl_data *data;
+	int err;
+	int offset = 0;
+
+	if (copy_from_user(&hdr, (void *)arg, sizeof(hdr)))
+		return -EFAULT;
+
+	if (hdr.ioc_version != OBD_IOCTL_VERSION) {
+		CERROR("Version mismatch kernel (%x) vs application (%x)\n",
+		       OBD_IOCTL_VERSION, hdr.ioc_version);
+		return -EINVAL;
+	}
+
+	if (hdr.ioc_len > OBD_MAX_IOCTL_BUFFER) {
+		CERROR("User buffer len %d exceeds %d max buffer\n",
+		       hdr.ioc_len, OBD_MAX_IOCTL_BUFFER);
+		return -EINVAL;
+	}
+
+	if (hdr.ioc_len < sizeof(struct obd_ioctl_data)) {
+		CERROR("User buffer too small for ioctl (%d)\n", hdr.ioc_len);
+		return -EINVAL;
+	}
+
+	/* When there are lots of processes calling vmalloc on multi-core
+	 * system, the high lock contention will hurt performance badly,
+	 * obdfilter-survey is an example, which relies on ioctl. So we'd
+	 * better avoid vmalloc on ioctl path. LU-66 */
+	OBD_ALLOC_LARGE(*buf, hdr.ioc_len);
+	if (*buf == NULL) {
+		CERROR("Cannot allocate control buffer of len %d\n",
+		       hdr.ioc_len);
+		return -EINVAL;
+	}
+	*len = hdr.ioc_len;
+	data = (struct obd_ioctl_data *)*buf;
+
+	if (copy_from_user(*buf, (void *)arg, hdr.ioc_len)) {
+		err = -EFAULT;
+		goto free_buf;
+	}
+	if (hdr.ioc_len != data->ioc_len) {
+		err = -EINVAL;
+		goto free_buf;
+	}
+
+	if (obd_ioctl_is_invalid(data)) {
+		CERROR("ioctl not correctly formatted\n");
+		err = -EINVAL;
+		goto free_buf;
+	}
+
+	if (data->ioc_inllen1) {
+		data->ioc_inlbuf1 = &data->ioc_bulk[0];
+		offset += cfs_size_round(data->ioc_inllen1);
+	}
+
+	if (data->ioc_inllen2) {
+		data->ioc_inlbuf2 = &data->ioc_bulk[0] + offset;
+		offset += cfs_size_round(data->ioc_inllen2);
+	}
+
+	if (data->ioc_inllen3) {
+		data->ioc_inlbuf3 = &data->ioc_bulk[0] + offset;
+		offset += cfs_size_round(data->ioc_inllen3);
+	}
+
+	if (data->ioc_inllen4) {
+		data->ioc_inlbuf4 = &data->ioc_bulk[0] + offset;
+	}
+
+	return 0;
+
+free_buf:
+	OBD_FREE_LARGE(*buf, hdr.ioc_len);
+	return err;
+}
+EXPORT_SYMBOL(obd_ioctl_getdata);
+
+int obd_ioctl_popdata(void *arg, void *data, int len)
+{
+	int err;
+
+	err = copy_to_user(arg, data, len);
+	if (err)
+		err = -EFAULT;
+	return err;
+}
+EXPORT_SYMBOL(obd_ioctl_popdata);
+
+/*  opening /dev/obd */
+static int obd_class_open(struct inode *inode, struct file *file)
+{
+	try_module_get(THIS_MODULE);
+	return 0;
+}
+
+/*  closing /dev/obd */
+static int obd_class_release(struct inode *inode, struct file *file)
+{
+	module_put(THIS_MODULE);
+	return 0;
+}
+
+/* to control /dev/obd */
+static long obd_class_ioctl(struct file *filp, unsigned int cmd,
+			    unsigned long arg)
+{
+	int err = 0;
+
+	/* Allow non-root access for OBD_IOC_PING_TARGET - used by lfs check */
+	if (!capable(CFS_CAP_SYS_ADMIN) && (cmd != OBD_IOC_PING_TARGET))
+		return err = -EACCES;
+	if ((cmd & 0xffffff00) == ((int)'T') << 8) /* ignore all tty ioctls */
+		return err = -ENOTTY;
+
+	err = class_handle_ioctl(cmd, (unsigned long)arg);
+
+	return err;
+}
+
+/* declare character device */
+static struct file_operations obd_psdev_fops = {
+	.owner	  = THIS_MODULE,
+	.unlocked_ioctl = obd_class_ioctl, /* unlocked_ioctl */
+	.open	   = obd_class_open,      /* open */
+	.release	= obd_class_release,   /* release */
+};
+
+/* modules setup */
+struct miscdevice obd_psdev = {
+	.minor = OBD_DEV_MINOR,
+	.name  = OBD_DEV_NAME,
+	.fops  = &obd_psdev_fops,
+};
+
+
+#if defined (CONFIG_PROC_FS)
+static int obd_proc_version_seq_show(struct seq_file *m, void *v)
+{
+	seq_printf(m, "lustre: %s\nkernel: %s\nbuild:  %s\n",
+		   LUSTRE_VERSION_STRING, "patchless_client", BUILD_VERSION);
+	return 0;
+}
+LPROC_SEQ_FOPS_RO(obd_proc_version);
+
+int obd_proc_pinger_seq_show(struct seq_file *m, void *v)
+{
+	seq_printf(m, "%s\n", "on");
+	return 0;
+}
+LPROC_SEQ_FOPS_RO(obd_proc_pinger);
+
+static int obd_proc_health_seq_show(struct seq_file *m, void *v)
+{
+	bool healthy = true;
+	int i;
+
+	if (libcfs_catastrophe)
+		seq_printf(m, "LBUG\n");
+
+	read_lock(&obd_dev_lock);
+	for (i = 0; i < class_devno_max(); i++) {
+		struct obd_device *obd;
+
+		obd = class_num2obd(i);
+		if (obd == NULL || !obd->obd_attached || !obd->obd_set_up)
+			continue;
+
+		LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
+		if (obd->obd_stopping)
+			continue;
+
+		class_incref(obd, __func__, current);
+		read_unlock(&obd_dev_lock);
+
+		if (obd_health_check(NULL, obd)) {
+			seq_printf(m, "device %s reported unhealthy\n",
+				   obd->obd_name);
+			healthy = false;
+		}
+		class_decref(obd, __func__, current);
+		read_lock(&obd_dev_lock);
+	}
+	read_unlock(&obd_dev_lock);
+
+	if (healthy)
+		seq_puts(m, "healthy\n");
+	else
+		seq_puts(m, "NOT HEALTHY\n");
+
+	return 0;
+}
+LPROC_SEQ_FOPS_RO(obd_proc_health);
+
+static int obd_proc_jobid_var_seq_show(struct seq_file *m, void *v)
+{
+	seq_printf(m, "%s\n", obd_jobid_var);
+	return 0;
+}
+
+static ssize_t obd_proc_jobid_var_seq_write(struct file *file,
+				const char __user *buffer,
+				size_t count, loff_t *off)
+{
+	if (!count || count > JOBSTATS_JOBID_VAR_MAX_LEN)
+		return -EINVAL;
+
+	memset(obd_jobid_var, 0, JOBSTATS_JOBID_VAR_MAX_LEN + 1);
+
+	/* This might leave the var invalid on error, which is probably fine.*/
+	if (copy_from_user(obd_jobid_var, buffer, count))
+		return -EFAULT;
+
+	/* Trim the trailing '\n' if any */
+	if (obd_jobid_var[count - 1] == '\n')
+		obd_jobid_var[count - 1] = 0;
+
+	return count;
+}
+LPROC_SEQ_FOPS(obd_proc_jobid_var);
+
+static int obd_proc_jobid_name_seq_show(struct seq_file *m, void *v)
+{
+	seq_printf(m, "%s\n", obd_jobid_var);
+	return 0;
+}
+
+static ssize_t obd_proc_jobid_name_seq_write(struct file *file,
+					     const char __user *buffer,
+					     size_t count, loff_t *off)
+{
+	if (!count || count > JOBSTATS_JOBID_SIZE)
+		return -EINVAL;
+
+	if (copy_from_user(obd_jobid_node, buffer, count))
+		return -EFAULT;
+
+	obd_jobid_node[count] = 0;
+
+	/* Trim the trailing '\n' if any */
+	if (obd_jobid_node[count - 1] == '\n')
+		obd_jobid_node[count - 1] = 0;
+
+	return count;
+}
+LPROC_SEQ_FOPS(obd_proc_jobid_name);
+
+/* Root for /proc/fs/lustre */
+struct proc_dir_entry *proc_lustre_root = NULL;
+EXPORT_SYMBOL(proc_lustre_root);
+
+struct lprocfs_vars lprocfs_base[] = {
+	{ "version", &obd_proc_version_fops },
+	{ "pinger", &obd_proc_pinger_fops },
+	{ "health_check", &obd_proc_health_fops },
+	{ "jobid_var", &obd_proc_jobid_var_fops },
+	{ .name =	"jobid_name",
+	  .fops =	&obd_proc_jobid_name_fops},
+	{ NULL }
+};
+
+static void *obd_device_list_seq_start(struct seq_file *p, loff_t *pos)
+{
+	if (*pos >= class_devno_max())
+		return NULL;
+
+	return pos;
+}
+
+static void obd_device_list_seq_stop(struct seq_file *p, void *v)
+{
+}
+
+static void *obd_device_list_seq_next(struct seq_file *p, void *v, loff_t *pos)
+{
+	++*pos;
+	if (*pos >= class_devno_max())
+		return NULL;
+
+	return pos;
+}
+
+static int obd_device_list_seq_show(struct seq_file *p, void *v)
+{
+	loff_t index = *(loff_t *)v;
+	struct obd_device *obd = class_num2obd((int)index);
+	char *status;
+
+	if (obd == NULL)
+		return 0;
+
+	LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
+	if (obd->obd_stopping)
+		status = "ST";
+	else if (obd->obd_inactive)
+		status = "IN";
+	else if (obd->obd_set_up)
+		status = "UP";
+	else if (obd->obd_attached)
+		status = "AT";
+	else
+		status = "--";
+
+	seq_printf(p, "%3d %s %s %s %s %d\n",
+		   (int)index, status, obd->obd_type->typ_name,
+		   obd->obd_name, obd->obd_uuid.uuid,
+		   atomic_read(&obd->obd_refcount));
+	return 0;
+}
+
+struct seq_operations obd_device_list_sops = {
+	.start = obd_device_list_seq_start,
+	.stop = obd_device_list_seq_stop,
+	.next = obd_device_list_seq_next,
+	.show = obd_device_list_seq_show,
+};
+
+static int obd_device_list_open(struct inode *inode, struct file *file)
+{
+	struct seq_file *seq;
+	int rc = seq_open(file, &obd_device_list_sops);
+
+	if (rc)
+		return rc;
+
+	seq = file->private_data;
+	seq->private = PDE_DATA(inode);
+
+	return 0;
+}
+
+struct file_operations obd_device_list_fops = {
+	.owner   = THIS_MODULE,
+	.open    = obd_device_list_open,
+	.read    = seq_read,
+	.llseek  = seq_lseek,
+	.release = seq_release,
+};
+
+int class_procfs_init(void)
+{
+	int rc = 0;
+
+	proc_lustre_root = lprocfs_register("fs/lustre", NULL,
+					    lprocfs_base, NULL);
+	if (IS_ERR(proc_lustre_root)) {
+		rc = PTR_ERR(proc_lustre_root);
+		proc_lustre_root = NULL;
+		goto out;
+	}
+
+	rc = lprocfs_seq_create(proc_lustre_root, "devices", 0444,
+				&obd_device_list_fops, NULL);
+out:
+	if (rc)
+		CERROR("error adding /proc/fs/lustre/devices file\n");
+	return 0;
+}
+
+int class_procfs_clean(void)
+{
+	if (proc_lustre_root) {
+		lprocfs_remove(&proc_lustre_root);
+	}
+	return 0;
+}
+#endif /* CONFIG_PROC_FS */
diff --git a/drivers/staging/lustre/lustre/obdclass/linux/linux-obdo.c b/drivers/staging/lustre/lustre/obdclass/linux/linux-obdo.c
new file mode 100644
index 000000000..62ed706b1
--- /dev/null
+++ b/drivers/staging/lustre/lustre/obdclass/linux/linux-obdo.c
@@ -0,0 +1,222 @@
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * 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 version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/obdclass/linux/linux-obdo.c
+ *
+ * Object Devices Class Driver
+ * These are the only exported functions, they provide some generic
+ * infrastructure for managing object devices
+ */
+
+#define DEBUG_SUBSYSTEM S_CLASS
+
+#include <linux/module.h>
+#include "../../include/obd_class.h"
+#include "../../include/lustre/lustre_idl.h"
+
+#include <linux/fs.h>
+#include <linux/pagemap.h> /* for PAGE_CACHE_SIZE */
+
+/*FIXME: Just copy from obdo_from_inode*/
+void obdo_from_la(struct obdo *dst, struct lu_attr *la, __u64 valid)
+{
+	u32 newvalid = 0;
+
+	if (valid & LA_ATIME) {
+		dst->o_atime = la->la_atime;
+		newvalid |= OBD_MD_FLATIME;
+	}
+	if (valid & LA_MTIME) {
+		dst->o_mtime = la->la_mtime;
+		newvalid |= OBD_MD_FLMTIME;
+	}
+	if (valid & LA_CTIME) {
+		dst->o_ctime = la->la_ctime;
+		newvalid |= OBD_MD_FLCTIME;
+	}
+	if (valid & LA_SIZE) {
+		dst->o_size = la->la_size;
+		newvalid |= OBD_MD_FLSIZE;
+	}
+	if (valid & LA_BLOCKS) {  /* allocation of space (x512 bytes) */
+		dst->o_blocks = la->la_blocks;
+		newvalid |= OBD_MD_FLBLOCKS;
+	}
+	if (valid & LA_TYPE) {
+		dst->o_mode = (dst->o_mode & S_IALLUGO) |
+			      (la->la_mode & S_IFMT);
+		newvalid |= OBD_MD_FLTYPE;
+	}
+	if (valid & LA_MODE) {
+		dst->o_mode = (dst->o_mode & S_IFMT) |
+			      (la->la_mode & S_IALLUGO);
+		newvalid |= OBD_MD_FLMODE;
+	}
+	if (valid & LA_UID) {
+		dst->o_uid = la->la_uid;
+		newvalid |= OBD_MD_FLUID;
+	}
+	if (valid & LA_GID) {
+		dst->o_gid = la->la_gid;
+		newvalid |= OBD_MD_FLGID;
+	}
+	dst->o_valid |= newvalid;
+}
+EXPORT_SYMBOL(obdo_from_la);
+
+/*FIXME: Just copy from obdo_from_inode*/
+void la_from_obdo(struct lu_attr *dst, struct obdo *obdo, u32 valid)
+{
+	__u64 newvalid = 0;
+
+	valid &= obdo->o_valid;
+
+	if (valid & OBD_MD_FLATIME) {
+		dst->la_atime = obdo->o_atime;
+		newvalid |= LA_ATIME;
+	}
+	if (valid & OBD_MD_FLMTIME) {
+		dst->la_mtime = obdo->o_mtime;
+		newvalid |= LA_MTIME;
+	}
+	if (valid & OBD_MD_FLCTIME) {
+		dst->la_ctime = obdo->o_ctime;
+		newvalid |= LA_CTIME;
+	}
+	if (valid & OBD_MD_FLSIZE) {
+		dst->la_size = obdo->o_size;
+		newvalid |= LA_SIZE;
+	}
+	if (valid & OBD_MD_FLBLOCKS) {
+		dst->la_blocks = obdo->o_blocks;
+		newvalid |= LA_BLOCKS;
+	}
+	if (valid & OBD_MD_FLTYPE) {
+		dst->la_mode = (dst->la_mode & S_IALLUGO) |
+			       (obdo->o_mode & S_IFMT);
+		newvalid |= LA_TYPE;
+	}
+	if (valid & OBD_MD_FLMODE) {
+		dst->la_mode = (dst->la_mode & S_IFMT) |
+			       (obdo->o_mode & S_IALLUGO);
+		newvalid |= LA_MODE;
+	}
+	if (valid & OBD_MD_FLUID) {
+		dst->la_uid = obdo->o_uid;
+		newvalid |= LA_UID;
+	}
+	if (valid & OBD_MD_FLGID) {
+		dst->la_gid = obdo->o_gid;
+		newvalid |= LA_GID;
+	}
+	dst->la_valid = newvalid;
+}
+EXPORT_SYMBOL(la_from_obdo);
+
+void obdo_refresh_inode(struct inode *dst, struct obdo *src, u32 valid)
+{
+	valid &= src->o_valid;
+
+	if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
+		CDEBUG(D_INODE,
+		       "valid %#llx, cur time %lu/%lu, new %llu/%llu\n",
+		       src->o_valid, LTIME_S(dst->i_mtime),
+		       LTIME_S(dst->i_ctime), src->o_mtime, src->o_ctime);
+
+	if (valid & OBD_MD_FLATIME && src->o_atime > LTIME_S(dst->i_atime))
+		LTIME_S(dst->i_atime) = src->o_atime;
+	if (valid & OBD_MD_FLMTIME && src->o_mtime > LTIME_S(dst->i_mtime))
+		LTIME_S(dst->i_mtime) = src->o_mtime;
+	if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(dst->i_ctime))
+		LTIME_S(dst->i_ctime) = src->o_ctime;
+	if (valid & OBD_MD_FLSIZE)
+		i_size_write(dst, src->o_size);
+	/* optimum IO size */
+	if (valid & OBD_MD_FLBLKSZ && src->o_blksize > (1 << dst->i_blkbits))
+		dst->i_blkbits = ffs(src->o_blksize) - 1;
+
+	if (dst->i_blkbits < PAGE_CACHE_SHIFT)
+		dst->i_blkbits = PAGE_CACHE_SHIFT;
+
+	/* allocation of space */
+	if (valid & OBD_MD_FLBLOCKS && src->o_blocks > dst->i_blocks)
+		/*
+		 * XXX shouldn't overflow be checked here like in
+		 * obdo_to_inode().
+		 */
+		dst->i_blocks = src->o_blocks;
+}
+EXPORT_SYMBOL(obdo_refresh_inode);
+
+void obdo_to_inode(struct inode *dst, struct obdo *src, u32 valid)
+{
+	valid &= src->o_valid;
+
+	LASSERTF(!(valid & (OBD_MD_FLTYPE | OBD_MD_FLGENER | OBD_MD_FLFID |
+			    OBD_MD_FLID | OBD_MD_FLGROUP)),
+		 "object "DOSTID", valid %x\n", POSTID(&src->o_oi), valid);
+
+	if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME))
+		CDEBUG(D_INODE,
+		       "valid %#llx, cur time %lu/%lu, new %llu/%llu\n",
+		       src->o_valid, LTIME_S(dst->i_mtime),
+		       LTIME_S(dst->i_ctime), src->o_mtime, src->o_ctime);
+
+	if (valid & OBD_MD_FLATIME)
+		LTIME_S(dst->i_atime) = src->o_atime;
+	if (valid & OBD_MD_FLMTIME)
+		LTIME_S(dst->i_mtime) = src->o_mtime;
+	if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(dst->i_ctime))
+		LTIME_S(dst->i_ctime) = src->o_ctime;
+	if (valid & OBD_MD_FLSIZE)
+		i_size_write(dst, src->o_size);
+	if (valid & OBD_MD_FLBLOCKS) { /* allocation of space */
+		dst->i_blocks = src->o_blocks;
+		if (dst->i_blocks < src->o_blocks) /* overflow */
+			dst->i_blocks = -1;
+
+	}
+	if (valid & OBD_MD_FLBLKSZ)
+		dst->i_blkbits = ffs(src->o_blksize)-1;
+	if (valid & OBD_MD_FLMODE)
+		dst->i_mode = (dst->i_mode & S_IFMT) | (src->o_mode & ~S_IFMT);
+	if (valid & OBD_MD_FLUID)
+		dst->i_uid = make_kuid(&init_user_ns, src->o_uid);
+	if (valid & OBD_MD_FLGID)
+		dst->i_gid = make_kgid(&init_user_ns, src->o_gid);
+	if (valid & OBD_MD_FLFLAGS)
+		dst->i_flags = src->o_flags;
+}
+EXPORT_SYMBOL(obdo_to_inode);
diff --git a/drivers/staging/lustre/lustre/obdclass/linux/linux-sysctl.c b/drivers/staging/lustre/lustre/obdclass/linux/linux-sysctl.c
new file mode 100644
index 000000000..4b62d2576
--- /dev/null
+++ b/drivers/staging/lustre/lustre/obdclass/linux/linux-sysctl.c
@@ -0,0 +1,405 @@
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * 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 version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ */
+
+#include <linux/module.h>
+#include <linux/sysctl.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/proc_fs.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/ctype.h>
+#include <linux/bitops.h>
+#include <linux/uaccess.h>
+#include <linux/utsname.h>
+
+#define DEBUG_SUBSYSTEM S_CLASS
+
+#include "../../include/obd_support.h"
+#include "../../include/lprocfs_status.h"
+
+#ifdef CONFIG_SYSCTL
+static struct ctl_table_header *obd_table_header;
+#endif
+
+
+#define OBD_SYSCTL 300
+
+enum {
+	OBD_TIMEOUT = 3,	/* RPC timeout before recovery/intr */
+	OBD_DUMP_ON_TIMEOUT,    /* dump kernel debug log upon eviction */
+	OBD_MEMUSED,	    /* bytes currently OBD_ALLOCated */
+	OBD_PAGESUSED,	  /* pages currently OBD_PAGE_ALLOCated */
+	OBD_MAXMEMUSED,	 /* maximum bytes OBD_ALLOCated concurrently */
+	OBD_MAXPAGESUSED,       /* maximum pages OBD_PAGE_ALLOCated concurrently */
+	OBD_SYNCFILTER,	 /* XXX temporary, as we play with sync osts.. */
+	OBD_LDLM_TIMEOUT,       /* LDLM timeout for ASTs before client eviction */
+	OBD_DUMP_ON_EVICTION,   /* dump kernel debug log upon eviction */
+	OBD_DEBUG_PEER_ON_TIMEOUT, /* dump peer debug when RPC times out */
+	OBD_ALLOC_FAIL_RATE,    /* memory allocation random failure rate */
+	OBD_MAX_DIRTY_PAGES,    /* maximum dirty pages */
+	OBD_AT_MIN,	     /* Adaptive timeouts params */
+	OBD_AT_MAX,
+	OBD_AT_EXTRA,
+	OBD_AT_EARLY_MARGIN,
+	OBD_AT_HISTORY,
+};
+
+
+#ifdef CONFIG_SYSCTL
+static int proc_set_timeout(struct ctl_table *table, int write,
+			void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+	int rc;
+
+	rc = proc_dointvec(table, write, buffer, lenp, ppos);
+	if (ldlm_timeout >= obd_timeout)
+		ldlm_timeout = max(obd_timeout / 3, 1U);
+	return rc;
+}
+
+static int proc_memory_alloc(struct ctl_table *table, int write,
+			void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+	char buf[22];
+	int len;
+
+	if (!*lenp || (*ppos && !write)) {
+		*lenp = 0;
+		return 0;
+	}
+	if (write)
+		return -EINVAL;
+
+	len = snprintf(buf, sizeof(buf), "%llu\n", obd_memory_sum());
+	if (len > *lenp)
+		len = *lenp;
+	buf[len] = '\0';
+	if (copy_to_user(buffer, buf, len))
+		return -EFAULT;
+	*lenp = len;
+	*ppos += *lenp;
+	return 0;
+}
+
+static int proc_pages_alloc(struct ctl_table *table, int write,
+			void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+	char buf[22];
+	int len;
+
+	if (!*lenp || (*ppos && !write)) {
+		*lenp = 0;
+		return 0;
+	}
+	if (write)
+		return -EINVAL;
+
+	len = snprintf(buf, sizeof(buf), "%llu\n", obd_pages_sum());
+	if (len > *lenp)
+		len = *lenp;
+	buf[len] = '\0';
+	if (copy_to_user(buffer, buf, len))
+		return -EFAULT;
+	*lenp = len;
+	*ppos += *lenp;
+	return 0;
+}
+
+static int proc_mem_max(struct ctl_table *table, int write, void __user *buffer,
+		 size_t *lenp, loff_t *ppos)
+{
+	char buf[22];
+	int len;
+
+	if (!*lenp || (*ppos && !write)) {
+		*lenp = 0;
+		return 0;
+	}
+	if (write)
+		return -EINVAL;
+
+	len = snprintf(buf, sizeof(buf), "%llu\n", obd_memory_max());
+	if (len > *lenp)
+		len = *lenp;
+	buf[len] = '\0';
+	if (copy_to_user(buffer, buf, len))
+		return -EFAULT;
+	*lenp = len;
+	*ppos += *lenp;
+	return 0;
+}
+
+static int proc_pages_max(struct ctl_table *table, int write,
+			void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+	char buf[22];
+	int len;
+
+	if (!*lenp || (*ppos && !write)) {
+		*lenp = 0;
+		return 0;
+	}
+	if (write)
+		return -EINVAL;
+
+	len = snprintf(buf, sizeof(buf), "%llu\n", obd_pages_max());
+	if (len > *lenp)
+		len = *lenp;
+	buf[len] = '\0';
+	if (copy_to_user(buffer, buf, len))
+		return -EFAULT;
+	*lenp = len;
+	*ppos += *lenp;
+	return 0;
+}
+
+static int proc_max_dirty_pages_in_mb(struct ctl_table *table, int write,
+			       void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+	int rc = 0;
+
+	if (!table->data || !table->maxlen || !*lenp || (*ppos && !write)) {
+		*lenp = 0;
+		return 0;
+	}
+	if (write) {
+		rc = lprocfs_write_frac_helper(buffer, *lenp,
+					       (unsigned int *)table->data,
+					       1 << (20 - PAGE_CACHE_SHIFT));
+		/* Don't allow them to let dirty pages exceed 90% of system
+		 * memory and set a hard minimum of 4MB. */
+		if (obd_max_dirty_pages > ((totalram_pages / 10) * 9)) {
+			CERROR("Refusing to set max dirty pages to %u, which is more than 90%% of available RAM; setting to %lu\n",
+			       obd_max_dirty_pages,
+			       ((totalram_pages / 10) * 9));
+			obd_max_dirty_pages = (totalram_pages / 10) * 9;
+		} else if (obd_max_dirty_pages < 4 << (20 - PAGE_CACHE_SHIFT)) {
+			obd_max_dirty_pages = 4 << (20 - PAGE_CACHE_SHIFT);
+		}
+	} else {
+		char buf[21];
+		int len;
+
+		len = lprocfs_read_frac_helper(buf, sizeof(buf),
+					       *(unsigned int *)table->data,
+					       1 << (20 - PAGE_CACHE_SHIFT));
+		if (len > *lenp)
+			len = *lenp;
+		buf[len] = '\0';
+		if (copy_to_user(buffer, buf, len))
+			return -EFAULT;
+		*lenp = len;
+	}
+	*ppos += *lenp;
+	return rc;
+}
+
+static int proc_alloc_fail_rate(struct ctl_table *table, int write,
+			 void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+	int rc	  = 0;
+
+	if (!table->data || !table->maxlen || !*lenp || (*ppos && !write)) {
+		*lenp = 0;
+		return 0;
+	}
+	if (write) {
+		rc = lprocfs_write_frac_helper(buffer, *lenp,
+					       (unsigned int *)table->data,
+					       OBD_ALLOC_FAIL_MULT);
+	} else {
+		char buf[21];
+		int  len;
+
+		len = lprocfs_read_frac_helper(buf, 21,
+					       *(unsigned int *)table->data,
+					       OBD_ALLOC_FAIL_MULT);
+		if (len > *lenp)
+			len = *lenp;
+		buf[len] = '\0';
+		if (copy_to_user(buffer, buf, len))
+			return -EFAULT;
+		*lenp = len;
+	}
+	*ppos += *lenp;
+	return rc;
+}
+
+static struct ctl_table obd_table[] = {
+	{
+		.procname = "timeout",
+		.data     = &obd_timeout,
+		.maxlen   = sizeof(int),
+		.mode     = 0644,
+		.proc_handler = &proc_set_timeout
+	},
+	{
+		.procname = "debug_peer_on_timeout",
+		.data     = &obd_debug_peer_on_timeout,
+		.maxlen   = sizeof(int),
+		.mode     = 0644,
+		.proc_handler = &proc_dointvec
+	},
+	{
+		.procname = "dump_on_timeout",
+		.data     = &obd_dump_on_timeout,
+		.maxlen   = sizeof(int),
+		.mode     = 0644,
+		.proc_handler = &proc_dointvec
+	},
+	{
+		.procname = "dump_on_eviction",
+		.data     = &obd_dump_on_eviction,
+		.maxlen   = sizeof(int),
+		.mode     = 0644,
+		.proc_handler = &proc_dointvec
+	},
+	{
+		.procname = "memused",
+		.data     = NULL,
+		.maxlen   = 0,
+		.mode     = 0444,
+		.proc_handler = &proc_memory_alloc
+	},
+	{
+		.procname = "pagesused",
+		.data     = NULL,
+		.maxlen   = 0,
+		.mode     = 0444,
+		.proc_handler = &proc_pages_alloc
+	},
+	{
+		.procname = "memused_max",
+		.data     = NULL,
+		.maxlen   = 0,
+		.mode     = 0444,
+		.proc_handler = &proc_mem_max
+	},
+	{
+		.procname = "pagesused_max",
+		.data     = NULL,
+		.maxlen   = 0,
+		.mode     = 0444,
+		.proc_handler = &proc_pages_max
+	},
+	{
+		.procname = "ldlm_timeout",
+		.data     = &ldlm_timeout,
+		.maxlen   = sizeof(int),
+		.mode     = 0644,
+		.proc_handler = &proc_set_timeout
+	},
+	{
+		.procname = "alloc_fail_rate",
+		.data     = &obd_alloc_fail_rate,
+		.maxlen   = sizeof(int),
+		.mode     = 0644,
+		.proc_handler = &proc_alloc_fail_rate
+	},
+	{
+		.procname = "max_dirty_mb",
+		.data     = &obd_max_dirty_pages,
+		.maxlen   = sizeof(int),
+		.mode     = 0644,
+		.proc_handler = &proc_max_dirty_pages_in_mb
+	},
+	{
+		.procname = "at_min",
+		.data     = &at_min,
+		.maxlen   = sizeof(int),
+		.mode     = 0644,
+		.proc_handler = &proc_dointvec,
+	},
+	{
+		.procname = "at_max",
+		.data     = &at_max,
+		.maxlen   = sizeof(int),
+		.mode     = 0644,
+		.proc_handler = &proc_dointvec,
+	},
+	{
+		.procname = "at_extra",
+		.data     = &at_extra,
+		.maxlen   = sizeof(int),
+		.mode     = 0644,
+		.proc_handler = &proc_dointvec,
+	},
+	{
+		.procname = "at_early_margin",
+		.data     = &at_early_margin,
+		.maxlen   = sizeof(int),
+		.mode     = 0644,
+		.proc_handler = &proc_dointvec,
+	},
+	{
+		.procname = "at_history",
+		.data     = &at_history,
+		.maxlen   = sizeof(int),
+		.mode     = 0644,
+		.proc_handler = &proc_dointvec,
+	},
+	{}
+};
+
+static struct ctl_table parent_table[] = {
+	{
+		.procname = "lustre",
+		.data     = NULL,
+		.maxlen   = 0,
+		.mode     = 0555,
+		.child    = obd_table
+	},
+	{}
+};
+#endif
+
+void obd_sysctl_init(void)
+{
+#ifdef CONFIG_SYSCTL
+	if (!obd_table_header)
+		obd_table_header = register_sysctl_table(parent_table);
+#endif
+}
+
+void obd_sysctl_clean(void)
+{
+#ifdef CONFIG_SYSCTL
+	if (obd_table_header)
+		unregister_sysctl_table(obd_table_header);
+	obd_table_header = NULL;
+#endif
+}