Adding upstream version 5.10.209.upstream/5.10.209

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1264 insertions, 0 deletions

diff --git a/fs/orangefs/orangefs-sysfs.c b/fs/orangefs/orangefs-sysfs.c
new file mode 100644
index 000000000..3627ea946
--- /dev/null
+++ b/fs/orangefs/orangefs-sysfs.c
@@ -0,0 +1,1264 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Documentation/ABI/stable/sysfs-fs-orangefs:
+ *
+ * What:		/sys/fs/orangefs/perf_counter_reset
+ * Date:		June 2015
+ * Contact:		Mike Marshall <hubcap@omnibond.com>
+ * Description:
+ * 			echo a 0 or a 1 into perf_counter_reset to
+ * 			reset all the counters in
+ * 			/sys/fs/orangefs/perf_counters
+ * 			except ones with PINT_PERF_PRESERVE set.
+ *
+ *
+ * What:		/sys/fs/orangefs/perf_counters/...
+ * Date:		Jun 2015
+ * Contact:		Mike Marshall <hubcap@omnibond.com>
+ * Description:
+ * 			Counters and settings for various caches.
+ * 			Read only.
+ *
+ *
+ * What:		/sys/fs/orangefs/perf_time_interval_secs
+ * Date:		Jun 2015
+ * Contact:		Mike Marshall <hubcap@omnibond.com>
+ * Description:
+ *			Length of perf counter intervals in
+ *			seconds.
+ *
+ *
+ * What:		/sys/fs/orangefs/perf_history_size
+ * Date:		Jun 2015
+ * Contact:		Mike Marshall <hubcap@omnibond.com>
+ * Description:
+ * 			The perf_counters cache statistics have N, or
+ * 			perf_history_size, samples. The default is
+ * 			one.
+ *
+ *			Every perf_time_interval_secs the (first)
+ *			samples are reset.
+ *
+ *			If N is greater than one, the "current" set
+ *			of samples is reset, and the samples from the
+ *			other N-1 intervals remain available.
+ *
+ *
+ * What:		/sys/fs/orangefs/op_timeout_secs
+ * Date:		Jun 2015
+ * Contact:		Mike Marshall <hubcap@omnibond.com>
+ * Description:
+ *			Service operation timeout in seconds.
+ *
+ *
+ * What:		/sys/fs/orangefs/slot_timeout_secs
+ * Date:		Jun 2015
+ * Contact:		Mike Marshall <hubcap@omnibond.com>
+ * Description:
+ *			"Slot" timeout in seconds. A "slot"
+ *			is an indexed buffer in the shared
+ *			memory segment used for communication
+ *			between the kernel module and userspace.
+ *			Slots are requested and waited for,
+ *			the wait times out after slot_timeout_secs.
+ *
+ * What:		/sys/fs/orangefs/cache_timeout_msecs
+ * Date:		Mar 2018
+ * Contact:		Martin Brandenburg <martin@omnibond.com>
+ * Description:
+ *			Time in milliseconds between which
+ *			orangefs_revalidate_mapping will invalidate the page
+ *			cache.
+ *
+ * What:		/sys/fs/orangefs/dcache_timeout_msecs
+ * Date:		Jul 2016
+ * Contact:		Martin Brandenburg <martin@omnibond.com>
+ * Description:
+ *			Time lookup is valid in milliseconds.
+ *
+ * What:		/sys/fs/orangefs/getattr_timeout_msecs
+ * Date:		Jul 2016
+ * Contact:		Martin Brandenburg <martin@omnibond.com>
+ * Description:
+ *			Time getattr is valid in milliseconds.
+ *
+ * What:		/sys/fs/orangefs/readahead_count
+ * Date:		Aug 2016
+ * Contact:		Martin Brandenburg <martin@omnibond.com>
+ * Description:
+ *			Readahead cache buffer count.
+ *
+ * What:		/sys/fs/orangefs/readahead_size
+ * Date:		Aug 2016
+ * Contact:		Martin Brandenburg <martin@omnibond.com>
+ * Description:
+ *			Readahead cache buffer size.
+ *
+ * What:		/sys/fs/orangefs/readahead_count_size
+ * Date:		Aug 2016
+ * Contact:		Martin Brandenburg <martin@omnibond.com>
+ * Description:
+ *			Readahead cache buffer count and size.
+ *
+ * What:		/sys/fs/orangefs/readahead_readcnt
+ * Date:		Jan 2017
+ * Contact:		Martin Brandenburg <martin@omnibond.com>
+ * Description:
+ *			Number of buffers (in multiples of readahead_size)
+ *			which can be read ahead for a single file at once.
+ *
+ * What:		/sys/fs/orangefs/acache/...
+ * Date:		Jun 2015
+ * Contact:		Martin Brandenburg <martin@omnibond.com>
+ * Description:
+ * 			Attribute cache configurable settings.
+ *
+ *
+ * What:		/sys/fs/orangefs/ncache/...
+ * Date:		Jun 2015
+ * Contact:		Mike Marshall <hubcap@omnibond.com>
+ * Description:
+ * 			Name cache configurable settings.
+ *
+ *
+ * What:		/sys/fs/orangefs/capcache/...
+ * Date:		Jun 2015
+ * Contact:		Mike Marshall <hubcap@omnibond.com>
+ * Description:
+ * 			Capability cache configurable settings.
+ *
+ *
+ * What:		/sys/fs/orangefs/ccache/...
+ * Date:		Jun 2015
+ * Contact:		Mike Marshall <hubcap@omnibond.com>
+ * Description:
+ * 			Credential cache configurable settings.
+ *
+ */
+
+#include <linux/fs.h>
+#include <linux/kobject.h>
+#include <linux/string.h>
+#include <linux/sysfs.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-sysfs.h"
+
+#define ORANGEFS_KOBJ_ID "orangefs"
+#define ACACHE_KOBJ_ID "acache"
+#define CAPCACHE_KOBJ_ID "capcache"
+#define CCACHE_KOBJ_ID "ccache"
+#define NCACHE_KOBJ_ID "ncache"
+#define PC_KOBJ_ID "pc"
+#define STATS_KOBJ_ID "stats"
+
+/*
+ * Every item calls orangefs_attr_show and orangefs_attr_store through
+ * orangefs_sysfs_ops. They look at the orangefs_attributes further below to
+ * call one of sysfs_int_show, sysfs_int_store, sysfs_service_op_show, or
+ * sysfs_service_op_store.
+ */
+
+struct orangefs_attribute {
+	struct attribute attr;
+	ssize_t (*show)(struct kobject *kobj,
+			struct orangefs_attribute *attr,
+			char *buf);
+	ssize_t (*store)(struct kobject *kobj,
+			 struct orangefs_attribute *attr,
+			 const char *buf,
+			 size_t count);
+};
+
+static ssize_t orangefs_attr_show(struct kobject *kobj,
+				  struct attribute *attr,
+				  char *buf)
+{
+	struct orangefs_attribute *attribute;
+
+	attribute = container_of(attr, struct orangefs_attribute, attr);
+	if (!attribute->show)
+		return -EIO;
+	return attribute->show(kobj, attribute, buf);
+}
+
+static ssize_t orangefs_attr_store(struct kobject *kobj,
+				   struct attribute *attr,
+				   const char *buf,
+				   size_t len)
+{
+	struct orangefs_attribute *attribute;
+
+	if (!strcmp(kobj->name, PC_KOBJ_ID) ||
+	    !strcmp(kobj->name, STATS_KOBJ_ID))
+		return -EPERM;
+
+	attribute = container_of(attr, struct orangefs_attribute, attr);
+	if (!attribute->store)
+		return -EIO;
+	return attribute->store(kobj, attribute, buf, len);
+}
+
+static const struct sysfs_ops orangefs_sysfs_ops = {
+	.show = orangefs_attr_show,
+	.store = orangefs_attr_store,
+};
+
+static ssize_t sysfs_int_show(struct kobject *kobj,
+    struct orangefs_attribute *attr, char *buf)
+{
+	int rc = -EIO;
+
+	gossip_debug(GOSSIP_SYSFS_DEBUG, "sysfs_int_show: id:%s:\n",
+	    kobj->name);
+
+	if (!strcmp(kobj->name, ORANGEFS_KOBJ_ID)) {
+		if (!strcmp(attr->attr.name, "op_timeout_secs")) {
+			rc = scnprintf(buf,
+				       PAGE_SIZE,
+				       "%d\n",
+				       op_timeout_secs);
+			goto out;
+		} else if (!strcmp(attr->attr.name,
+				   "slot_timeout_secs")) {
+			rc = scnprintf(buf,
+				       PAGE_SIZE,
+				       "%d\n",
+				       slot_timeout_secs);
+			goto out;
+		} else if (!strcmp(attr->attr.name,
+				   "cache_timeout_msecs")) {
+			rc = scnprintf(buf,
+				       PAGE_SIZE,
+				       "%d\n",
+				       orangefs_cache_timeout_msecs);
+			goto out;
+		} else if (!strcmp(attr->attr.name,
+				   "dcache_timeout_msecs")) {
+			rc = scnprintf(buf,
+				       PAGE_SIZE,
+				       "%d\n",
+				       orangefs_dcache_timeout_msecs);
+			goto out;
+		} else if (!strcmp(attr->attr.name,
+				   "getattr_timeout_msecs")) {
+			rc = scnprintf(buf,
+				       PAGE_SIZE,
+				       "%d\n",
+				       orangefs_getattr_timeout_msecs);
+			goto out;
+		} else {
+			goto out;
+		}
+
+	} else if (!strcmp(kobj->name, STATS_KOBJ_ID)) {
+		if (!strcmp(attr->attr.name, "reads")) {
+			rc = scnprintf(buf,
+				       PAGE_SIZE,
+				       "%lu\n",
+				       orangefs_stats.reads);
+			goto out;
+		} else if (!strcmp(attr->attr.name, "writes")) {
+			rc = scnprintf(buf,
+				       PAGE_SIZE,
+				       "%lu\n",
+				       orangefs_stats.writes);
+			goto out;
+		} else {
+			goto out;
+		}
+	}
+
+out:
+
+	return rc;
+}
+
+static ssize_t sysfs_int_store(struct kobject *kobj,
+    struct orangefs_attribute *attr, const char *buf, size_t count)
+{
+	int rc = 0;
+
+	gossip_debug(GOSSIP_SYSFS_DEBUG,
+		     "sysfs_int_store: start attr->attr.name:%s: buf:%s:\n",
+		     attr->attr.name, buf);
+
+	if (!strcmp(attr->attr.name, "op_timeout_secs")) {
+		rc = kstrtoint(buf, 0, &op_timeout_secs);
+		goto out;
+	} else if (!strcmp(attr->attr.name, "slot_timeout_secs")) {
+		rc = kstrtoint(buf, 0, &slot_timeout_secs);
+		goto out;
+	} else if (!strcmp(attr->attr.name, "cache_timeout_msecs")) {
+		rc = kstrtoint(buf, 0, &orangefs_cache_timeout_msecs);
+		goto out;
+	} else if (!strcmp(attr->attr.name, "dcache_timeout_msecs")) {
+		rc = kstrtoint(buf, 0, &orangefs_dcache_timeout_msecs);
+		goto out;
+	} else if (!strcmp(attr->attr.name, "getattr_timeout_msecs")) {
+		rc = kstrtoint(buf, 0, &orangefs_getattr_timeout_msecs);
+		goto out;
+	} else {
+		goto out;
+	}
+
+out:
+	if (rc)
+		rc = -EINVAL;
+	else
+		rc = count;
+
+	return rc;
+}
+
+/*
+ * obtain attribute values from userspace with a service operation.
+ */
+static ssize_t sysfs_service_op_show(struct kobject *kobj,
+    struct orangefs_attribute *attr, char *buf)
+{
+	struct orangefs_kernel_op_s *new_op = NULL;
+	int rc = 0;
+	char *ser_op_type = NULL;
+	__u32 op_alloc_type;
+
+	gossip_debug(GOSSIP_SYSFS_DEBUG,
+		     "sysfs_service_op_show: id:%s:\n",
+		     kobj->name);
+
+	if (strcmp(kobj->name, PC_KOBJ_ID))
+		op_alloc_type = ORANGEFS_VFS_OP_PARAM;
+	else
+		op_alloc_type = ORANGEFS_VFS_OP_PERF_COUNT;
+
+	new_op = op_alloc(op_alloc_type);
+	if (!new_op)
+		return -ENOMEM;
+
+	/* Can't do a service_operation if the client is not running... */
+	rc = is_daemon_in_service();
+	if (rc) {
+		pr_info_ratelimited("%s: Client not running :%d:\n",
+			__func__,
+			is_daemon_in_service());
+		goto out;
+	}
+
+	if (strcmp(kobj->name, PC_KOBJ_ID))
+		new_op->upcall.req.param.type = ORANGEFS_PARAM_REQUEST_GET;
+
+	if (!strcmp(kobj->name, ORANGEFS_KOBJ_ID)) {
+		/* Drop unsupported requests first. */
+		if (!(orangefs_features & ORANGEFS_FEATURE_READAHEAD) &&
+		    (!strcmp(attr->attr.name, "readahead_count") ||
+		    !strcmp(attr->attr.name, "readahead_size") ||
+		    !strcmp(attr->attr.name, "readahead_count_size") ||
+		    !strcmp(attr->attr.name, "readahead_readcnt"))) {
+			rc = -EINVAL;
+			goto out;
+		}
+
+		if (!strcmp(attr->attr.name, "perf_history_size"))
+			new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_PERF_HISTORY_SIZE;
+		else if (!strcmp(attr->attr.name,
+				 "perf_time_interval_secs"))
+			new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_PERF_TIME_INTERVAL_SECS;
+		else if (!strcmp(attr->attr.name,
+				 "perf_counter_reset"))
+			new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_PERF_RESET;
+
+		else if (!strcmp(attr->attr.name,
+				 "readahead_count"))
+			new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_READAHEAD_COUNT;
+
+		else if (!strcmp(attr->attr.name,
+				 "readahead_size"))
+			new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_READAHEAD_SIZE;
+
+		else if (!strcmp(attr->attr.name,
+				 "readahead_count_size"))
+			new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_READAHEAD_COUNT_SIZE;
+
+		else if (!strcmp(attr->attr.name,
+				 "readahead_readcnt"))
+			new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_READAHEAD_READCNT;
+	} else if (!strcmp(kobj->name, ACACHE_KOBJ_ID)) {
+		if (!strcmp(attr->attr.name, "timeout_msecs"))
+			new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_ACACHE_TIMEOUT_MSECS;
+
+		if (!strcmp(attr->attr.name, "hard_limit"))
+			new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_ACACHE_HARD_LIMIT;
+
+		if (!strcmp(attr->attr.name, "soft_limit"))
+			new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_ACACHE_SOFT_LIMIT;
+
+		if (!strcmp(attr->attr.name, "reclaim_percentage"))
+			new_op->upcall.req.param.op =
+			  ORANGEFS_PARAM_REQUEST_OP_ACACHE_RECLAIM_PERCENTAGE;
+
+	} else if (!strcmp(kobj->name, CAPCACHE_KOBJ_ID)) {
+		if (!strcmp(attr->attr.name, "timeout_secs"))
+			new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_TIMEOUT_SECS;
+
+		if (!strcmp(attr->attr.name, "hard_limit"))
+			new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_HARD_LIMIT;
+
+		if (!strcmp(attr->attr.name, "soft_limit"))
+			new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_SOFT_LIMIT;
+
+		if (!strcmp(attr->attr.name, "reclaim_percentage"))
+			new_op->upcall.req.param.op =
+			  ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_RECLAIM_PERCENTAGE;
+
+	} else if (!strcmp(kobj->name, CCACHE_KOBJ_ID)) {
+		if (!strcmp(attr->attr.name, "timeout_secs"))
+			new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_CCACHE_TIMEOUT_SECS;
+
+		if (!strcmp(attr->attr.name, "hard_limit"))
+			new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_CCACHE_HARD_LIMIT;
+
+		if (!strcmp(attr->attr.name, "soft_limit"))
+			new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_CCACHE_SOFT_LIMIT;
+
+		if (!strcmp(attr->attr.name, "reclaim_percentage"))
+			new_op->upcall.req.param.op =
+			  ORANGEFS_PARAM_REQUEST_OP_CCACHE_RECLAIM_PERCENTAGE;
+
+	} else if (!strcmp(kobj->name, NCACHE_KOBJ_ID)) {
+		if (!strcmp(attr->attr.name, "timeout_msecs"))
+			new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_NCACHE_TIMEOUT_MSECS;
+
+		if (!strcmp(attr->attr.name, "hard_limit"))
+			new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_NCACHE_HARD_LIMIT;
+
+		if (!strcmp(attr->attr.name, "soft_limit"))
+			new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_NCACHE_SOFT_LIMIT;
+
+		if (!strcmp(attr->attr.name, "reclaim_percentage"))
+			new_op->upcall.req.param.op =
+			  ORANGEFS_PARAM_REQUEST_OP_NCACHE_RECLAIM_PERCENTAGE;
+
+	} else if (!strcmp(kobj->name, PC_KOBJ_ID)) {
+		if (!strcmp(attr->attr.name, ACACHE_KOBJ_ID))
+			new_op->upcall.req.perf_count.type =
+				ORANGEFS_PERF_COUNT_REQUEST_ACACHE;
+
+		if (!strcmp(attr->attr.name, CAPCACHE_KOBJ_ID))
+			new_op->upcall.req.perf_count.type =
+				ORANGEFS_PERF_COUNT_REQUEST_CAPCACHE;
+
+		if (!strcmp(attr->attr.name, NCACHE_KOBJ_ID))
+			new_op->upcall.req.perf_count.type =
+				ORANGEFS_PERF_COUNT_REQUEST_NCACHE;
+
+	} else {
+		gossip_err("sysfs_service_op_show: unknown kobj_id:%s:\n",
+			   kobj->name);
+		rc = -EINVAL;
+		goto out;
+	}
+
+
+	if (strcmp(kobj->name, PC_KOBJ_ID))
+		ser_op_type = "orangefs_param";
+	else
+		ser_op_type = "orangefs_perf_count";
+
+	/*
+	 * The service_operation will return an errno return code on
+	 * error, and zero on success.
+	 */
+	rc = service_operation(new_op, ser_op_type, ORANGEFS_OP_INTERRUPTIBLE);
+
+out:
+	if (!rc) {
+		if (strcmp(kobj->name, PC_KOBJ_ID)) {
+			if (new_op->upcall.req.param.op ==
+			    ORANGEFS_PARAM_REQUEST_OP_READAHEAD_COUNT_SIZE) {
+				rc = scnprintf(buf, PAGE_SIZE, "%d %d\n",
+				    (int)new_op->downcall.resp.param.u.
+				    value32[0],
+				    (int)new_op->downcall.resp.param.u.
+				    value32[1]);
+			} else {
+				rc = scnprintf(buf, PAGE_SIZE, "%d\n",
+				    (int)new_op->downcall.resp.param.u.value64);
+			}
+		} else {
+			rc = scnprintf(
+				buf,
+				PAGE_SIZE,
+				"%s",
+				new_op->downcall.resp.perf_count.buffer);
+		}
+	}
+
+	op_release(new_op);
+
+	return rc;
+
+}
+
+/*
+ * pass attribute values back to userspace with a service operation.
+ *
+ * We have to do a memory allocation, an sscanf and a service operation.
+ * And we have to evaluate what the user entered, to make sure the
+ * value is within the range supported by the attribute. So, there's
+ * a lot of return code checking and mapping going on here.
+ *
+ * We want to return 1 if we think everything went OK, and
+ * EINVAL if not.
+ */
+static ssize_t sysfs_service_op_store(struct kobject *kobj,
+    struct orangefs_attribute *attr, const char *buf, size_t count)
+{
+	struct orangefs_kernel_op_s *new_op = NULL;
+	int val = 0;
+	int rc = 0;
+
+	gossip_debug(GOSSIP_SYSFS_DEBUG,
+		     "sysfs_service_op_store: id:%s:\n",
+		     kobj->name);
+
+	new_op = op_alloc(ORANGEFS_VFS_OP_PARAM);
+	if (!new_op)
+		return -EINVAL; /* sic */
+
+	/* Can't do a service_operation if the client is not running... */
+	rc = is_daemon_in_service();
+	if (rc) {
+		pr_info("%s: Client not running :%d:\n",
+			__func__,
+			is_daemon_in_service());
+		goto out;
+	}
+
+	/*
+	 * The value we want to send back to userspace is in buf, unless this
+	 * there are two parameters, which is specially handled below.
+	 */
+	if (strcmp(kobj->name, ORANGEFS_KOBJ_ID) ||
+	    strcmp(attr->attr.name, "readahead_count_size")) {
+		rc = kstrtoint(buf, 0, &val);
+		if (rc)
+			goto out;
+	}
+
+	new_op->upcall.req.param.type = ORANGEFS_PARAM_REQUEST_SET;
+
+	if (!strcmp(kobj->name, ORANGEFS_KOBJ_ID)) {
+		/* Drop unsupported requests first. */
+		if (!(orangefs_features & ORANGEFS_FEATURE_READAHEAD) &&
+		    (!strcmp(attr->attr.name, "readahead_count") ||
+		    !strcmp(attr->attr.name, "readahead_size") ||
+		    !strcmp(attr->attr.name, "readahead_count_size") ||
+		    !strcmp(attr->attr.name, "readahead_readcnt"))) {
+			rc = -EINVAL;
+			goto out;
+		}
+
+		if (!strcmp(attr->attr.name, "perf_history_size")) {
+			if (val > 0) {
+				new_op->upcall.req.param.op =
+				  ORANGEFS_PARAM_REQUEST_OP_PERF_HISTORY_SIZE;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		} else if (!strcmp(attr->attr.name,
+				   "perf_time_interval_secs")) {
+			if (val > 0) {
+				new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_PERF_TIME_INTERVAL_SECS;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		} else if (!strcmp(attr->attr.name,
+				   "perf_counter_reset")) {
+			if ((val == 0) || (val == 1)) {
+				new_op->upcall.req.param.op =
+					ORANGEFS_PARAM_REQUEST_OP_PERF_RESET;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		} else if (!strcmp(attr->attr.name,
+				   "readahead_count")) {
+			if ((val >= 0)) {
+				new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_READAHEAD_COUNT;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		} else if (!strcmp(attr->attr.name,
+				   "readahead_size")) {
+			if ((val >= 0)) {
+				new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_READAHEAD_SIZE;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		} else if (!strcmp(attr->attr.name,
+				   "readahead_count_size")) {
+			int val1, val2;
+			rc = sscanf(buf, "%d %d", &val1, &val2);
+			if (rc < 2) {
+				rc = 0;
+				goto out;
+			}
+			if ((val1 >= 0) && (val2 >= 0)) {
+				new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_READAHEAD_COUNT_SIZE;
+			} else {
+				rc = 0;
+				goto out;
+			}
+			new_op->upcall.req.param.u.value32[0] = val1;
+			new_op->upcall.req.param.u.value32[1] = val2;
+			goto value_set;
+		} else if (!strcmp(attr->attr.name,
+				   "readahead_readcnt")) {
+			if ((val >= 0)) {
+				new_op->upcall.req.param.op =
+				ORANGEFS_PARAM_REQUEST_OP_READAHEAD_READCNT;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		}
+
+	} else if (!strcmp(kobj->name, ACACHE_KOBJ_ID)) {
+		if (!strcmp(attr->attr.name, "hard_limit")) {
+			if (val > -1) {
+				new_op->upcall.req.param.op =
+				  ORANGEFS_PARAM_REQUEST_OP_ACACHE_HARD_LIMIT;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		} else if (!strcmp(attr->attr.name, "soft_limit")) {
+			if (val > -1) {
+				new_op->upcall.req.param.op =
+				  ORANGEFS_PARAM_REQUEST_OP_ACACHE_SOFT_LIMIT;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		} else if (!strcmp(attr->attr.name,
+				   "reclaim_percentage")) {
+			if ((val > -1) && (val < 101)) {
+				new_op->upcall.req.param.op =
+				  ORANGEFS_PARAM_REQUEST_OP_ACACHE_RECLAIM_PERCENTAGE;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		} else if (!strcmp(attr->attr.name, "timeout_msecs")) {
+			if (val > -1) {
+				new_op->upcall.req.param.op =
+				  ORANGEFS_PARAM_REQUEST_OP_ACACHE_TIMEOUT_MSECS;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		}
+
+	} else if (!strcmp(kobj->name, CAPCACHE_KOBJ_ID)) {
+		if (!strcmp(attr->attr.name, "hard_limit")) {
+			if (val > -1) {
+				new_op->upcall.req.param.op =
+				  ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_HARD_LIMIT;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		} else if (!strcmp(attr->attr.name, "soft_limit")) {
+			if (val > -1) {
+				new_op->upcall.req.param.op =
+				  ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_SOFT_LIMIT;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		} else if (!strcmp(attr->attr.name,
+				   "reclaim_percentage")) {
+			if ((val > -1) && (val < 101)) {
+				new_op->upcall.req.param.op =
+				  ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_RECLAIM_PERCENTAGE;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		} else if (!strcmp(attr->attr.name, "timeout_secs")) {
+			if (val > -1) {
+				new_op->upcall.req.param.op =
+				  ORANGEFS_PARAM_REQUEST_OP_CAPCACHE_TIMEOUT_SECS;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		}
+
+	} else if (!strcmp(kobj->name, CCACHE_KOBJ_ID)) {
+		if (!strcmp(attr->attr.name, "hard_limit")) {
+			if (val > -1) {
+				new_op->upcall.req.param.op =
+				  ORANGEFS_PARAM_REQUEST_OP_CCACHE_HARD_LIMIT;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		} else if (!strcmp(attr->attr.name, "soft_limit")) {
+			if (val > -1) {
+				new_op->upcall.req.param.op =
+				  ORANGEFS_PARAM_REQUEST_OP_CCACHE_SOFT_LIMIT;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		} else if (!strcmp(attr->attr.name,
+				   "reclaim_percentage")) {
+			if ((val > -1) && (val < 101)) {
+				new_op->upcall.req.param.op =
+				  ORANGEFS_PARAM_REQUEST_OP_CCACHE_RECLAIM_PERCENTAGE;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		} else if (!strcmp(attr->attr.name, "timeout_secs")) {
+			if (val > -1) {
+				new_op->upcall.req.param.op =
+				  ORANGEFS_PARAM_REQUEST_OP_CCACHE_TIMEOUT_SECS;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		}
+
+	} else if (!strcmp(kobj->name, NCACHE_KOBJ_ID)) {
+		if (!strcmp(attr->attr.name, "hard_limit")) {
+			if (val > -1) {
+				new_op->upcall.req.param.op =
+				  ORANGEFS_PARAM_REQUEST_OP_NCACHE_HARD_LIMIT;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		} else if (!strcmp(attr->attr.name, "soft_limit")) {
+			if (val > -1) {
+				new_op->upcall.req.param.op =
+				  ORANGEFS_PARAM_REQUEST_OP_NCACHE_SOFT_LIMIT;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		} else if (!strcmp(attr->attr.name,
+				   "reclaim_percentage")) {
+			if ((val > -1) && (val < 101)) {
+				new_op->upcall.req.param.op =
+					ORANGEFS_PARAM_REQUEST_OP_NCACHE_RECLAIM_PERCENTAGE;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		} else if (!strcmp(attr->attr.name, "timeout_msecs")) {
+			if (val > -1) {
+				new_op->upcall.req.param.op =
+				  ORANGEFS_PARAM_REQUEST_OP_NCACHE_TIMEOUT_MSECS;
+			} else {
+				rc = 0;
+				goto out;
+			}
+		}
+
+	} else {
+		gossip_err("sysfs_service_op_store: unknown kobj_id:%s:\n",
+			   kobj->name);
+		rc = -EINVAL;
+		goto out;
+	}
+
+	new_op->upcall.req.param.u.value64 = val;
+value_set:
+
+	/*
+	 * The service_operation will return a errno return code on
+	 * error, and zero on success.
+	 */
+	rc = service_operation(new_op, "orangefs_param", ORANGEFS_OP_INTERRUPTIBLE);
+
+	if (rc < 0) {
+		gossip_err("sysfs_service_op_store: service op returned:%d:\n",
+			rc);
+		rc = 0;
+	} else {
+		rc = count;
+	}
+
+out:
+	op_release(new_op);
+
+	if (rc == -ENOMEM || rc == 0)
+		rc = -EINVAL;
+
+	return rc;
+}
+
+static struct orangefs_attribute op_timeout_secs_attribute =
+	__ATTR(op_timeout_secs, 0664, sysfs_int_show, sysfs_int_store);
+
+static struct orangefs_attribute slot_timeout_secs_attribute =
+	__ATTR(slot_timeout_secs, 0664, sysfs_int_show, sysfs_int_store);
+
+static struct orangefs_attribute cache_timeout_msecs_attribute =
+	__ATTR(cache_timeout_msecs, 0664, sysfs_int_show, sysfs_int_store);
+
+static struct orangefs_attribute dcache_timeout_msecs_attribute =
+	__ATTR(dcache_timeout_msecs, 0664, sysfs_int_show, sysfs_int_store);
+
+static struct orangefs_attribute getattr_timeout_msecs_attribute =
+	__ATTR(getattr_timeout_msecs, 0664, sysfs_int_show, sysfs_int_store);
+
+static struct orangefs_attribute readahead_count_attribute =
+	__ATTR(readahead_count, 0664, sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct orangefs_attribute readahead_size_attribute =
+	__ATTR(readahead_size, 0664, sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct orangefs_attribute readahead_count_size_attribute =
+	__ATTR(readahead_count_size, 0664, sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct orangefs_attribute readahead_readcnt_attribute =
+	__ATTR(readahead_readcnt, 0664, sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct orangefs_attribute perf_counter_reset_attribute =
+	__ATTR(perf_counter_reset,
+	       0664,
+	       sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct orangefs_attribute perf_history_size_attribute =
+	__ATTR(perf_history_size,
+	       0664,
+	       sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct orangefs_attribute perf_time_interval_secs_attribute =
+	__ATTR(perf_time_interval_secs,
+	       0664,
+	       sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct attribute *orangefs_default_attrs[] = {
+	&op_timeout_secs_attribute.attr,
+	&slot_timeout_secs_attribute.attr,
+	&cache_timeout_msecs_attribute.attr,
+	&dcache_timeout_msecs_attribute.attr,
+	&getattr_timeout_msecs_attribute.attr,
+	&readahead_count_attribute.attr,
+	&readahead_size_attribute.attr,
+	&readahead_count_size_attribute.attr,
+	&readahead_readcnt_attribute.attr,
+	&perf_counter_reset_attribute.attr,
+	&perf_history_size_attribute.attr,
+	&perf_time_interval_secs_attribute.attr,
+	NULL,
+};
+
+static struct kobj_type orangefs_ktype = {
+	.sysfs_ops = &orangefs_sysfs_ops,
+	.default_attrs = orangefs_default_attrs,
+};
+
+static struct orangefs_attribute acache_hard_limit_attribute =
+	__ATTR(hard_limit,
+	       0664,
+	       sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct orangefs_attribute acache_reclaim_percent_attribute =
+	__ATTR(reclaim_percentage,
+	       0664,
+	       sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct orangefs_attribute acache_soft_limit_attribute =
+	__ATTR(soft_limit,
+	       0664,
+	       sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct orangefs_attribute acache_timeout_msecs_attribute =
+	__ATTR(timeout_msecs,
+	       0664,
+	       sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct attribute *acache_orangefs_default_attrs[] = {
+	&acache_hard_limit_attribute.attr,
+	&acache_reclaim_percent_attribute.attr,
+	&acache_soft_limit_attribute.attr,
+	&acache_timeout_msecs_attribute.attr,
+	NULL,
+};
+
+static struct kobj_type acache_orangefs_ktype = {
+	.sysfs_ops = &orangefs_sysfs_ops,
+	.default_attrs = acache_orangefs_default_attrs,
+};
+
+static struct orangefs_attribute capcache_hard_limit_attribute =
+	__ATTR(hard_limit,
+	       0664,
+	       sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct orangefs_attribute capcache_reclaim_percent_attribute =
+	__ATTR(reclaim_percentage,
+	       0664,
+	       sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct orangefs_attribute capcache_soft_limit_attribute =
+	__ATTR(soft_limit,
+	       0664,
+	       sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct orangefs_attribute capcache_timeout_secs_attribute =
+	__ATTR(timeout_secs,
+	       0664,
+	       sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct attribute *capcache_orangefs_default_attrs[] = {
+	&capcache_hard_limit_attribute.attr,
+	&capcache_reclaim_percent_attribute.attr,
+	&capcache_soft_limit_attribute.attr,
+	&capcache_timeout_secs_attribute.attr,
+	NULL,
+};
+
+static struct kobj_type capcache_orangefs_ktype = {
+	.sysfs_ops = &orangefs_sysfs_ops,
+	.default_attrs = capcache_orangefs_default_attrs,
+};
+
+static struct orangefs_attribute ccache_hard_limit_attribute =
+	__ATTR(hard_limit,
+	       0664,
+	       sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct orangefs_attribute ccache_reclaim_percent_attribute =
+	__ATTR(reclaim_percentage,
+	       0664,
+	       sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct orangefs_attribute ccache_soft_limit_attribute =
+	__ATTR(soft_limit,
+	       0664,
+	       sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct orangefs_attribute ccache_timeout_secs_attribute =
+	__ATTR(timeout_secs,
+	       0664,
+	       sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct attribute *ccache_orangefs_default_attrs[] = {
+	&ccache_hard_limit_attribute.attr,
+	&ccache_reclaim_percent_attribute.attr,
+	&ccache_soft_limit_attribute.attr,
+	&ccache_timeout_secs_attribute.attr,
+	NULL,
+};
+
+static struct kobj_type ccache_orangefs_ktype = {
+	.sysfs_ops = &orangefs_sysfs_ops,
+	.default_attrs = ccache_orangefs_default_attrs,
+};
+
+static struct orangefs_attribute ncache_hard_limit_attribute =
+	__ATTR(hard_limit,
+	       0664,
+	       sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct orangefs_attribute ncache_reclaim_percent_attribute =
+	__ATTR(reclaim_percentage,
+	       0664,
+	       sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct orangefs_attribute ncache_soft_limit_attribute =
+	__ATTR(soft_limit,
+	       0664,
+	       sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct orangefs_attribute ncache_timeout_msecs_attribute =
+	__ATTR(timeout_msecs,
+	       0664,
+	       sysfs_service_op_show,
+	       sysfs_service_op_store);
+
+static struct attribute *ncache_orangefs_default_attrs[] = {
+	&ncache_hard_limit_attribute.attr,
+	&ncache_reclaim_percent_attribute.attr,
+	&ncache_soft_limit_attribute.attr,
+	&ncache_timeout_msecs_attribute.attr,
+	NULL,
+};
+
+static struct kobj_type ncache_orangefs_ktype = {
+	.sysfs_ops = &orangefs_sysfs_ops,
+	.default_attrs = ncache_orangefs_default_attrs,
+};
+
+static struct orangefs_attribute pc_acache_attribute =
+	__ATTR(acache,
+	       0664,
+	       sysfs_service_op_show,
+	       NULL);
+
+static struct orangefs_attribute pc_capcache_attribute =
+	__ATTR(capcache,
+	       0664,
+	       sysfs_service_op_show,
+	       NULL);
+
+static struct orangefs_attribute pc_ncache_attribute =
+	__ATTR(ncache,
+	       0664,
+	       sysfs_service_op_show,
+	       NULL);
+
+static struct attribute *pc_orangefs_default_attrs[] = {
+	&pc_acache_attribute.attr,
+	&pc_capcache_attribute.attr,
+	&pc_ncache_attribute.attr,
+	NULL,
+};
+
+static struct kobj_type pc_orangefs_ktype = {
+	.sysfs_ops = &orangefs_sysfs_ops,
+	.default_attrs = pc_orangefs_default_attrs,
+};
+
+static struct orangefs_attribute stats_reads_attribute =
+	__ATTR(reads,
+	       0664,
+	       sysfs_int_show,
+	       NULL);
+
+static struct orangefs_attribute stats_writes_attribute =
+	__ATTR(writes,
+	       0664,
+	       sysfs_int_show,
+	       NULL);
+
+static struct attribute *stats_orangefs_default_attrs[] = {
+	&stats_reads_attribute.attr,
+	&stats_writes_attribute.attr,
+	NULL,
+};
+
+static struct kobj_type stats_orangefs_ktype = {
+	.sysfs_ops = &orangefs_sysfs_ops,
+	.default_attrs = stats_orangefs_default_attrs,
+};
+
+static struct kobject *orangefs_obj;
+static struct kobject *acache_orangefs_obj;
+static struct kobject *capcache_orangefs_obj;
+static struct kobject *ccache_orangefs_obj;
+static struct kobject *ncache_orangefs_obj;
+static struct kobject *pc_orangefs_obj;
+static struct kobject *stats_orangefs_obj;
+
+int orangefs_sysfs_init(void)
+{
+	int rc = -EINVAL;
+
+	gossip_debug(GOSSIP_SYSFS_DEBUG, "orangefs_sysfs_init: start\n");
+
+	/* create /sys/fs/orangefs. */
+	orangefs_obj = kzalloc(sizeof(*orangefs_obj), GFP_KERNEL);
+	if (!orangefs_obj)
+		goto out;
+
+	rc = kobject_init_and_add(orangefs_obj,
+				  &orangefs_ktype,
+				  fs_kobj,
+				  ORANGEFS_KOBJ_ID);
+
+	if (rc)
+		goto ofs_obj_bail;
+
+	kobject_uevent(orangefs_obj, KOBJ_ADD);
+
+	/* create /sys/fs/orangefs/acache. */
+	acache_orangefs_obj = kzalloc(sizeof(*acache_orangefs_obj), GFP_KERNEL);
+	if (!acache_orangefs_obj) {
+		rc = -EINVAL;
+		goto ofs_obj_bail;
+	}
+
+	rc = kobject_init_and_add(acache_orangefs_obj,
+				  &acache_orangefs_ktype,
+				  orangefs_obj,
+				  ACACHE_KOBJ_ID);
+
+	if (rc)
+		goto acache_obj_bail;
+
+	kobject_uevent(acache_orangefs_obj, KOBJ_ADD);
+
+	/* create /sys/fs/orangefs/capcache. */
+	capcache_orangefs_obj =
+		kzalloc(sizeof(*capcache_orangefs_obj), GFP_KERNEL);
+	if (!capcache_orangefs_obj) {
+		rc = -EINVAL;
+		goto acache_obj_bail;
+	}
+
+	rc = kobject_init_and_add(capcache_orangefs_obj,
+				  &capcache_orangefs_ktype,
+				  orangefs_obj,
+				  CAPCACHE_KOBJ_ID);
+	if (rc)
+		goto capcache_obj_bail;
+
+	kobject_uevent(capcache_orangefs_obj, KOBJ_ADD);
+
+	/* create /sys/fs/orangefs/ccache. */
+	ccache_orangefs_obj =
+		kzalloc(sizeof(*ccache_orangefs_obj), GFP_KERNEL);
+	if (!ccache_orangefs_obj) {
+		rc = -EINVAL;
+		goto capcache_obj_bail;
+	}
+
+	rc = kobject_init_and_add(ccache_orangefs_obj,
+				  &ccache_orangefs_ktype,
+				  orangefs_obj,
+				  CCACHE_KOBJ_ID);
+	if (rc)
+		goto ccache_obj_bail;
+
+	kobject_uevent(ccache_orangefs_obj, KOBJ_ADD);
+
+	/* create /sys/fs/orangefs/ncache. */
+	ncache_orangefs_obj = kzalloc(sizeof(*ncache_orangefs_obj), GFP_KERNEL);
+	if (!ncache_orangefs_obj) {
+		rc = -EINVAL;
+		goto ccache_obj_bail;
+	}
+
+	rc = kobject_init_and_add(ncache_orangefs_obj,
+				  &ncache_orangefs_ktype,
+				  orangefs_obj,
+				  NCACHE_KOBJ_ID);
+
+	if (rc)
+		goto ncache_obj_bail;
+
+	kobject_uevent(ncache_orangefs_obj, KOBJ_ADD);
+
+	/* create /sys/fs/orangefs/perf_counters. */
+	pc_orangefs_obj = kzalloc(sizeof(*pc_orangefs_obj), GFP_KERNEL);
+	if (!pc_orangefs_obj) {
+		rc = -EINVAL;
+		goto ncache_obj_bail;
+	}
+
+	rc = kobject_init_and_add(pc_orangefs_obj,
+				  &pc_orangefs_ktype,
+				  orangefs_obj,
+				  "perf_counters");
+
+	if (rc)
+		goto pc_obj_bail;
+
+	kobject_uevent(pc_orangefs_obj, KOBJ_ADD);
+
+	/* create /sys/fs/orangefs/stats. */
+	stats_orangefs_obj = kzalloc(sizeof(*stats_orangefs_obj), GFP_KERNEL);
+	if (!stats_orangefs_obj) {
+		rc = -EINVAL;
+		goto pc_obj_bail;
+	}
+
+	rc = kobject_init_and_add(stats_orangefs_obj,
+				  &stats_orangefs_ktype,
+				  orangefs_obj,
+				  STATS_KOBJ_ID);
+
+	if (rc)
+		goto stats_obj_bail;
+
+	kobject_uevent(stats_orangefs_obj, KOBJ_ADD);
+	goto out;
+
+stats_obj_bail:
+		kobject_put(stats_orangefs_obj);
+pc_obj_bail:
+		kobject_put(pc_orangefs_obj);
+ncache_obj_bail:
+		kobject_put(ncache_orangefs_obj);
+ccache_obj_bail:
+		kobject_put(ccache_orangefs_obj);
+capcache_obj_bail:
+		kobject_put(capcache_orangefs_obj);
+acache_obj_bail:
+		kobject_put(acache_orangefs_obj);
+ofs_obj_bail:
+		kobject_put(orangefs_obj);
+out:
+	return rc;
+}
+
+void orangefs_sysfs_exit(void)
+{
+	gossip_debug(GOSSIP_SYSFS_DEBUG, "orangefs_sysfs_exit: start\n");
+	kobject_put(acache_orangefs_obj);
+	kobject_put(capcache_orangefs_obj);
+	kobject_put(ccache_orangefs_obj);
+	kobject_put(ncache_orangefs_obj);
+	kobject_put(pc_orangefs_obj);
+	kobject_put(stats_orangefs_obj);
+	kobject_put(orangefs_obj);
+}