staging/lustre/osc: move suitable values from procfs to sysfs

All single-value controls are moved from /proc/fs/lustre/osc/.../
to /sys/fs/lustre/osc/.../
Signed-off-by: NOleg Drokin <green@linuxhacker.ru>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/osc/lproc_osc.c

@@ -42,25 +42,25 @@
 #include <linux/seq_file.h>
 #include "osc_internal.h"
 
-static int osc_active_seq_show(struct seq_file *m, void *v)
+static ssize_t active_show(struct kobject *kobj, struct attribute *attr,
+			   char *buf)
 {
-	struct obd_device *dev = m->private;
-
-	LPROCFS_CLIMP_CHECK(dev);
-	seq_printf(m, "%d\n", !dev->u.cli.cl_import->imp_deactive);
-	LPROCFS_CLIMP_EXIT(dev);
+	struct obd_device *dev = container_of(kobj, struct obd_device,
+					      obd_kobj);
 
-	return 0;
+	return sprintf(buf, "%d\n", !dev->u.cli.cl_import->imp_deactive);
 }
 
-static ssize_t osc_active_seq_write(struct file *file,
-				const char __user *buffer,
-				size_t count, loff_t *off)
+static ssize_t active_store(struct kobject *kobj, struct attribute *attr,
+			    const char *buffer,
+			    size_t count)
 {
-	struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
-	int val, rc;
+	struct obd_device *dev = container_of(kobj, struct obd_device,
+					      obd_kobj);
+	int rc;
+	unsigned long val;
 
-	rc = lprocfs_write_helper(buffer, count, &val);
+	rc = kstrtoul(buffer, 10, &val);
 	if (rc)
 		return rc;
 	if (val < 0 || val > 1)
@@ -70,41 +70,43 @@ static ssize_t osc_active_seq_write(struct file *file,
 	if (dev->u.cli.cl_import->imp_deactive == val)
 		rc = ptlrpc_set_import_active(dev->u.cli.cl_import, val);
 	else
-		CDEBUG(D_CONFIG, "activate %d: ignoring repeat request\n", val);
+		CDEBUG(D_CONFIG, "activate %ld: ignoring repeat request\n",
+		       val);
 
 	return count;
 }
-LPROC_SEQ_FOPS(osc_active);
+LUSTRE_RW_ATTR(active);
 
-static int osc_max_rpcs_in_flight_seq_show(struct seq_file *m, void *v)
+static ssize_t max_rpcs_in_flight_show(struct kobject *kobj,
+				       struct attribute *attr,
+				       char *buf)
 {
-	struct obd_device *dev = m->private;
+	struct obd_device *dev = container_of(kobj, struct obd_device,
+					      obd_kobj);
 	struct client_obd *cli = &dev->u.cli;
 
-	client_obd_list_lock(&cli->cl_loi_list_lock);
-	seq_printf(m, "%u\n", cli->cl_max_rpcs_in_flight);
-	client_obd_list_unlock(&cli->cl_loi_list_lock);
-
-	return 0;
+	return sprintf(buf, "%u\n", cli->cl_max_rpcs_in_flight);
 }
 
-static ssize_t osc_max_rpcs_in_flight_seq_write(struct file *file,
-			const char __user *buffer,
-			size_t count, loff_t *off)
+static ssize_t max_rpcs_in_flight_store(struct kobject *kobj,
+					struct attribute *attr,
+					const char *buffer,
+					size_t count)
 {
-	struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
+	struct obd_device *dev = container_of(kobj, struct obd_device,
+					      obd_kobj);
 	struct client_obd *cli = &dev->u.cli;
 	struct ptlrpc_request_pool *pool = cli->cl_import->imp_rq_pool;
-	int val, rc;
+	int rc;
+	unsigned long val;
 
-	rc = lprocfs_write_helper(buffer, count, &val);
+	rc = kstrtoul(buffer, 10, &val);
 	if (rc)
 		return rc;
 
 	if (val < 1 || val > OSC_MAX_RIF_MAX)
 		return -ERANGE;
 
-	LPROCFS_CLIMP_CHECK(dev);
 	if (pool && val > cli->cl_max_rpcs_in_flight)
 		pool->prp_populate(pool, val-cli->cl_max_rpcs_in_flight);
 
@@ -112,14 +114,16 @@ static ssize_t osc_max_rpcs_in_flight_seq_write(struct file *file,
 	cli->cl_max_rpcs_in_flight = val;
 	client_obd_list_unlock(&cli->cl_loi_list_lock);
 
-	LPROCFS_CLIMP_EXIT(dev);
 	return count;
 }
-LPROC_SEQ_FOPS(osc_max_rpcs_in_flight);
+LUSTRE_RW_ATTR(max_rpcs_in_flight);
 
-static int osc_max_dirty_mb_seq_show(struct seq_file *m, void *v)
+static ssize_t max_dirty_mb_show(struct kobject *kobj,
+				 struct attribute *attr,
+				 char *buf)
 {
-	struct obd_device *dev = m->private;
+	struct obd_device *dev = container_of(kobj, struct obd_device,
+					      obd_kobj);
 	struct client_obd *cli = &dev->u.cli;
 	long val;
 	int mult;
@@ -129,22 +133,26 @@ static int osc_max_dirty_mb_seq_show(struct seq_file *m, void *v)
 	client_obd_list_unlock(&cli->cl_loi_list_lock);
 
 	mult = 1 << 20;
-	return lprocfs_seq_read_frac_helper(m, val, mult);
+	return lprocfs_read_frac_helper(buf, PAGE_SIZE, val, mult);
 }
 
-static ssize_t osc_max_dirty_mb_seq_write(struct file *file,
-				const char __user *buffer,
-				size_t count, loff_t *off)
+static ssize_t max_dirty_mb_store(struct kobject *kobj,
+				  struct attribute *attr,
+				  const char *buffer,
+				  size_t count)
 {
-	struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
+	struct obd_device *dev = container_of(kobj, struct obd_device,
+					      obd_kobj);
 	struct client_obd *cli = &dev->u.cli;
-	int pages_number, mult, rc;
+	int rc;
+	unsigned long pages_number;
 
-	mult = 1 << (20 - PAGE_CACHE_SHIFT);
-	rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
+	rc = kstrtoul(buffer, 10, &pages_number);
 	if (rc)
 		return rc;
 
+	pages_number *= 1 << (20 - PAGE_CACHE_SHIFT); /* MB -> pages */
+
 	if (pages_number <= 0 ||
 	    pages_number > OSC_MAX_DIRTY_MB_MAX << (20 - PAGE_CACHE_SHIFT) ||
 	    pages_number > totalram_pages / 4) /* 1/4 of RAM */
@@ -157,7 +165,7 @@ static ssize_t osc_max_dirty_mb_seq_write(struct file *file,
 
 	return count;
 }
-LPROC_SEQ_FOPS(osc_max_dirty_mb);
+LUSTRE_RW_ATTR(max_dirty_mb);
 
 static int osc_cached_mb_seq_show(struct seq_file *m, void *v)
 {
@@ -210,44 +218,51 @@ static ssize_t osc_cached_mb_seq_write(struct file *file,
 }
 LPROC_SEQ_FOPS(osc_cached_mb);
 
-static int osc_cur_dirty_bytes_seq_show(struct seq_file *m, void *v)
+static ssize_t cur_dirty_bytes_show(struct kobject *kobj,
+				    struct attribute *attr,
+				    char *buf)
 {
-	struct obd_device *dev = m->private;
+	struct obd_device *dev = container_of(kobj, struct obd_device,
+					      obd_kobj);
 	struct client_obd *cli = &dev->u.cli;
+	int len;
 
 	client_obd_list_lock(&cli->cl_loi_list_lock);
-	seq_printf(m, "%lu\n", cli->cl_dirty);
+	len = sprintf(buf, "%lu\n", cli->cl_dirty);
 	client_obd_list_unlock(&cli->cl_loi_list_lock);
 
-	return 0;
+	return len;
 }
-LPROC_SEQ_FOPS_RO(osc_cur_dirty_bytes);
+LUSTRE_RO_ATTR(cur_dirty_bytes);
 
-static int osc_cur_grant_bytes_seq_show(struct seq_file *m, void *v)
+static ssize_t cur_grant_bytes_show(struct kobject *kobj,
+				    struct attribute *attr,
+				    char *buf)
 {
-	struct obd_device *dev = m->private;
+	struct obd_device *dev = container_of(kobj, struct obd_device,
+					      obd_kobj);
 	struct client_obd *cli = &dev->u.cli;
+	int len;
 
 	client_obd_list_lock(&cli->cl_loi_list_lock);
-	seq_printf(m, "%lu\n", cli->cl_avail_grant);
+	len = sprintf(buf, "%lu\n", cli->cl_avail_grant);
 	client_obd_list_unlock(&cli->cl_loi_list_lock);
 
-	return 0;
+	return len;
 }
 
-static ssize_t osc_cur_grant_bytes_seq_write(struct file *file,
-				const char __user *buffer,
-				size_t count, loff_t *off)
+static ssize_t cur_grant_bytes_store(struct kobject *kobj,
+				     struct attribute *attr,
+				     const char *buffer,
+				     size_t count)
 {
-	struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
+	struct obd_device *obd = container_of(kobj, struct obd_device,
+					      obd_kobj);
 	struct client_obd *cli = &obd->u.cli;
 	int rc;
-	__u64	      val;
+	unsigned long long val;
 
-	if (obd == NULL)
-		return 0;
-
-	rc = lprocfs_write_u64_helper(buffer, count, &val);
+	rc = kstrtoull(buffer, 10, &val);
 	if (rc)
 		return rc;
 
@@ -255,54 +270,56 @@ static ssize_t osc_cur_grant_bytes_seq_write(struct file *file,
 	client_obd_list_lock(&cli->cl_loi_list_lock);
 	if (val >= cli->cl_avail_grant) {
 		client_obd_list_unlock(&cli->cl_loi_list_lock);
-		return 0;
+		return -EINVAL;
 	}
 	client_obd_list_unlock(&cli->cl_loi_list_lock);
 
-	LPROCFS_CLIMP_CHECK(obd);
 	if (cli->cl_import->imp_state == LUSTRE_IMP_FULL)
 		rc = osc_shrink_grant_to_target(cli, val);
-	LPROCFS_CLIMP_EXIT(obd);
 	if (rc)
 		return rc;
 	return count;
 }
-LPROC_SEQ_FOPS(osc_cur_grant_bytes);
+LUSTRE_RW_ATTR(cur_grant_bytes);
 
-static int osc_cur_lost_grant_bytes_seq_show(struct seq_file *m, void *v)
+static ssize_t cur_lost_grant_bytes_show(struct kobject *kobj,
+					 struct attribute *attr,
+					 char *buf)
 {
-	struct obd_device *dev = m->private;
+	struct obd_device *dev = container_of(kobj, struct obd_device,
+					      obd_kobj);
 	struct client_obd *cli = &dev->u.cli;
+	int len;
 
 	client_obd_list_lock(&cli->cl_loi_list_lock);
-	seq_printf(m, "%lu\n", cli->cl_lost_grant);
+	len = sprintf(buf, "%lu\n", cli->cl_lost_grant);
 	client_obd_list_unlock(&cli->cl_loi_list_lock);
 
-	return 0;
+	return len;
 }
-LPROC_SEQ_FOPS_RO(osc_cur_lost_grant_bytes);
+LUSTRE_RO_ATTR(cur_lost_grant_bytes);
 
-static int osc_grant_shrink_interval_seq_show(struct seq_file *m, void *v)
+static ssize_t grant_shrink_interval_show(struct kobject *kobj,
+					  struct attribute *attr,
+					  char *buf)
 {
-	struct obd_device *obd = m->private;
+	struct obd_device *obd = container_of(kobj, struct obd_device,
+					      obd_kobj);
 
-	if (obd == NULL)
-		return 0;
-	seq_printf(m, "%d\n", obd->u.cli.cl_grant_shrink_interval);
-	return 0;
+	return sprintf(buf, "%d\n", obd->u.cli.cl_grant_shrink_interval);
 }
 
-static ssize_t osc_grant_shrink_interval_seq_write(struct file *file,
-				const char __user *buffer,
-				size_t count, loff_t *off)
+static ssize_t grant_shrink_interval_store(struct kobject *kobj,
+					   struct attribute *attr,
+					   const char *buffer,
+					   size_t count)
 {
-	struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
-	int val, rc;
-
-	if (obd == NULL)
-		return 0;
+	struct obd_device *obd = container_of(kobj, struct obd_device,
+					      obd_kobj);
+	int rc;
+	unsigned long val;
 
-	rc = lprocfs_write_helper(buffer, count, &val);
+	rc = kstrtoul(buffer, 10, &val);
 	if (rc)
 		return rc;
 
@@ -313,30 +330,29 @@ static ssize_t osc_grant_shrink_interval_seq_write(struct file *file,
 
 	return count;
 }
-LPROC_SEQ_FOPS(osc_grant_shrink_interval);
+LUSTRE_RW_ATTR(grant_shrink_interval);
 
-static int osc_checksum_seq_show(struct seq_file *m, void *v)
+static ssize_t checksums_show(struct kobject *kobj,
+			      struct attribute *attr,
+			      char *buf)
 {
-	struct obd_device *obd = m->private;
-
-	if (obd == NULL)
-		return 0;
+	struct obd_device *obd = container_of(kobj, struct obd_device,
+					      obd_kobj);
 
-	seq_printf(m, "%d\n", obd->u.cli.cl_checksum ? 1 : 0);
-	return 0;
+	return sprintf(buf, "%d\n", obd->u.cli.cl_checksum ? 1 : 0);
 }
 
-static ssize_t osc_checksum_seq_write(struct file *file,
-				const char __user *buffer,
-				size_t count, loff_t *off)
+static ssize_t checksums_store(struct kobject *kobj,
+			       struct attribute *attr,
+			       const char *buffer,
+			       size_t count)
 {
-	struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
-	int val, rc;
-
-	if (obd == NULL)
-		return 0;
+	struct obd_device *obd = container_of(kobj, struct obd_device,
+					      obd_kobj);
+	int rc;
+	unsigned long val;
 
-	rc = lprocfs_write_helper(buffer, count, &val);
+	rc = kstrtoul(buffer, 10, &val);
 	if (rc)
 		return rc;
 
@@ -344,7 +360,7 @@ static ssize_t osc_checksum_seq_write(struct file *file,
 
 	return count;
 }
-LPROC_SEQ_FOPS(osc_checksum);
+LUSTRE_RW_ATTR(checksums);
 
 static int osc_checksum_type_seq_show(struct seq_file *m, void *v)
 {
@@ -400,22 +416,27 @@ static ssize_t osc_checksum_type_seq_write(struct file *file,
 }
 LPROC_SEQ_FOPS(osc_checksum_type);
 
-static int osc_resend_count_seq_show(struct seq_file *m, void *v)
+static ssize_t resend_count_show(struct kobject *kobj,
+			     struct attribute *attr,
+			     char *buf)
 {
-	struct obd_device *obd = m->private;
+	struct obd_device *obd = container_of(kobj, struct obd_device,
+					      obd_kobj);
 
-	seq_printf(m, "%u\n", atomic_read(&obd->u.cli.cl_resends));
-	return 0;
+	return sprintf(buf, "%u\n", atomic_read(&obd->u.cli.cl_resends));
 }
 
-static ssize_t osc_resend_count_seq_write(struct file *file,
-				const char __user *buffer,
-				size_t count, loff_t *off)
+static ssize_t resend_count_store(struct kobject *kobj,
+			      struct attribute *attr,
+			      const char *buffer,
+			      size_t count)
 {
-	struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
-	int val, rc;
+	struct obd_device *obd = container_of(kobj, struct obd_device,
+					      obd_kobj);
+	int rc;
+	unsigned long val;
 
-	rc = lprocfs_write_helper(buffer, count, &val);
+	rc = kstrtoul(buffer, 10, &val);
 	if (rc)
 		return rc;
 
@@ -426,75 +447,94 @@ static ssize_t osc_resend_count_seq_write(struct file *file,
 
 	return count;
 }
-LPROC_SEQ_FOPS(osc_resend_count);
+LUSTRE_RW_ATTR(resend_count);
 
-static int osc_contention_seconds_seq_show(struct seq_file *m, void *v)
+static ssize_t contention_seconds_show(struct kobject *kobj,
+				       struct attribute *attr,
+				       char *buf)
 {
-	struct obd_device *obd = m->private;
+	struct obd_device *obd = container_of(kobj, struct obd_device,
+					      obd_kobj);
 	struct osc_device *od  = obd2osc_dev(obd);
 
-	seq_printf(m, "%u\n", od->od_contention_time);
-	return 0;
+	return sprintf(buf, "%u\n", od->od_contention_time);
 }
 
-static ssize_t osc_contention_seconds_seq_write(struct file *file,
-					const char __user *buffer,
-					size_t count, loff_t *off)
+static ssize_t contention_seconds_store(struct kobject *kobj,
+					struct attribute *attr,
+					const char *buffer,
+					size_t count)
 {
-	struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
+	struct obd_device *obd = container_of(kobj, struct obd_device,
+					      obd_kobj);
 	struct osc_device *od  = obd2osc_dev(obd);
 
 	return lprocfs_write_helper(buffer, count, &od->od_contention_time) ?:
 		count;
 }
-LPROC_SEQ_FOPS(osc_contention_seconds);
+LUSTRE_RW_ATTR(contention_seconds);
 
-static int osc_lockless_truncate_seq_show(struct seq_file *m, void *v)
+static ssize_t lockless_truncate_show(struct kobject *kobj,
+				      struct attribute *attr,
+				      char *buf)
 {
-	struct obd_device *obd = m->private;
+	struct obd_device *obd = container_of(kobj, struct obd_device,
+					      obd_kobj);
 	struct osc_device *od  = obd2osc_dev(obd);
 
-	seq_printf(m, "%u\n", od->od_lockless_truncate);
-	return 0;
+	return sprintf(buf, "%u\n", od->od_lockless_truncate);
 }
 
-static ssize_t osc_lockless_truncate_seq_write(struct file *file,
-					const char __user *buffer,
-					size_t count, loff_t *off)
+static ssize_t lockless_truncate_store(struct kobject *kobj,
+				       struct attribute *attr,
+				       const char *buffer,
+				       size_t count)
 {
-	struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
+	struct obd_device *obd = container_of(kobj, struct obd_device,
+					      obd_kobj);
 	struct osc_device *od  = obd2osc_dev(obd);
 
 	return lprocfs_write_helper(buffer, count, &od->od_lockless_truncate) ?:
 		count;
 }
-LPROC_SEQ_FOPS(osc_lockless_truncate);
+LUSTRE_RW_ATTR(lockless_truncate);
 
-static int osc_destroys_in_flight_seq_show(struct seq_file *m, void *v)
+static ssize_t destroys_in_flight_show(struct kobject *kobj,
+				       struct attribute *attr,
+				       char *buf)
 {
-	struct obd_device *obd = m->private;
+	struct obd_device *obd = container_of(kobj, struct obd_device,
+					      obd_kobj);
 
-	seq_printf(m, "%u\n", atomic_read(&obd->u.cli.cl_destroy_in_flight));
-	return 0;
+	return sprintf(buf, "%u\n",
+		       atomic_read(&obd->u.cli.cl_destroy_in_flight));
 }
-LPROC_SEQ_FOPS_RO(osc_destroys_in_flight);
+LUSTRE_RO_ATTR(destroys_in_flight);
 
-static int osc_obd_max_pages_per_rpc_seq_show(struct seq_file *m, void *v)
+static ssize_t max_pages_per_rpc_show(struct kobject *kobj,
+				      struct attribute *attr,
+				      char *buf)
 {
-	return lprocfs_obd_rd_max_pages_per_rpc(m, m->private);
+	struct obd_device *dev = container_of(kobj, struct obd_device,
+					      obd_kobj);
+	struct client_obd *cli = &dev->u.cli;
+
+	return sprintf(buf, "%d\n", cli->cl_max_pages_per_rpc);
 }
 
-static ssize_t osc_obd_max_pages_per_rpc_seq_write(struct file *file,
-				const char __user *buffer,
-				size_t count, loff_t *off)
+static ssize_t max_pages_per_rpc_store(struct kobject *kobj,
+				       struct attribute *attr,
+				       const char *buffer,
+				       size_t count)
 {
-	struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
+	struct obd_device *dev = container_of(kobj, struct obd_device,
+					      obd_kobj);
 	struct client_obd *cli = &dev->u.cli;
 	struct obd_connect_data *ocd = &cli->cl_import->imp_connect_data;
 	int chunk_mask, rc;
-	__u64 val;
+	unsigned long long val;
 
-	rc = lprocfs_write_u64_helper(buffer, count, &val);
+	rc = kstrtoull(buffer, 10, &val);
 	if (rc)
 		return rc;
 
@@ -502,23 +542,19 @@ static ssize_t osc_obd_max_pages_per_rpc_seq_write(struct file *file,
 	if (val >= ONE_MB_BRW_SIZE)
 		val >>= PAGE_CACHE_SHIFT;
 
-	LPROCFS_CLIMP_CHECK(dev);
-
 	chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_CACHE_SHIFT)) - 1);
 	/* max_pages_per_rpc must be chunk aligned */
 	val = (val + ~chunk_mask) & chunk_mask;
 	if (val == 0 || val > ocd->ocd_brw_size >> PAGE_CACHE_SHIFT) {
-		LPROCFS_CLIMP_EXIT(dev);
 		return -ERANGE;
 	}
 	client_obd_list_lock(&cli->cl_loi_list_lock);
 	cli->cl_max_pages_per_rpc = val;
 	client_obd_list_unlock(&cli->cl_loi_list_lock);
 
-	LPROCFS_CLIMP_EXIT(dev);
 	return count;
 }
-LPROC_SEQ_FOPS(osc_obd_max_pages_per_rpc);
+LUSTRE_RW_ATTR(max_pages_per_rpc);
 
 LPROC_SEQ_FOPS_RO_TYPE(osc, connect_flags);
 LPROC_SEQ_FOPS_RO_TYPE(osc, server_uuid);
@@ -537,22 +573,9 @@ static struct lprocfs_vars lprocfs_osc_obd_vars[] = {
 	/*{ "filegroups",      lprocfs_rd_filegroups,  NULL, 0 },*/
 	{ "ost_server_uuid", &osc_server_uuid_fops, NULL, 0 },
 	{ "ost_conn_uuid",   &osc_conn_uuid_fops, NULL, 0 },
-	{ "active",	     &osc_active_fops, NULL },
-	{ "max_pages_per_rpc", &osc_obd_max_pages_per_rpc_fops, NULL },
-	{ "max_rpcs_in_flight", &osc_max_rpcs_in_flight_fops, NULL },
-	{ "destroys_in_flight", &osc_destroys_in_flight_fops, NULL, 0 },
-	{ "max_dirty_mb",    &osc_max_dirty_mb_fops, NULL },
 	{ "osc_cached_mb",   &osc_cached_mb_fops, NULL },
-	{ "cur_dirty_bytes", &osc_cur_dirty_bytes_fops, NULL, 0 },
-	{ "cur_grant_bytes", &osc_cur_grant_bytes_fops, NULL },
-	{ "cur_lost_grant_bytes", &osc_cur_lost_grant_bytes_fops, NULL, 0},
-	{ "grant_shrink_interval", &osc_grant_shrink_interval_fops, NULL },
-	{ "checksums",       &osc_checksum_fops, NULL },
 	{ "checksum_type",   &osc_checksum_type_fops, NULL },
-	{ "resend_count",    &osc_resend_count_fops, NULL},
 	{ "timeouts",	     &osc_timeouts_fops, NULL, 0 },
-	{ "contention_seconds", &osc_contention_seconds_fops, NULL },
-	{ "lockless_truncate",  &osc_lockless_truncate_fops, NULL },
 	{ "import",		&osc_import_fops, NULL },
 	{ "state",		&osc_state_fops, NULL, 0 },
 	{ "pinger_recov",	&osc_pinger_recov_fops, NULL },
@@ -724,7 +747,29 @@ int lproc_osc_attach_seqstat(struct obd_device *dev)
 	return rc;
 }
 
+static struct attribute *osc_attrs[] = {
+	&lustre_attr_active.attr,
+	&lustre_attr_checksums.attr,
+	&lustre_attr_contention_seconds.attr,
+	&lustre_attr_cur_dirty_bytes.attr,
+	&lustre_attr_cur_grant_bytes.attr,
+	&lustre_attr_cur_lost_grant_bytes.attr,
+	&lustre_attr_destroys_in_flight.attr,
+	&lustre_attr_grant_shrink_interval.attr,
+	&lustre_attr_lockless_truncate.attr,
+	&lustre_attr_max_dirty_mb.attr,
+	&lustre_attr_max_pages_per_rpc.attr,
+	&lustre_attr_max_rpcs_in_flight.attr,
+	&lustre_attr_resend_count.attr,
+	NULL,
+};
+
+static struct attribute_group osc_attr_group = {
+	.attrs = osc_attrs,
+};
+
 void lprocfs_osc_init_vars(struct lprocfs_static_vars *lvars)
 {
+	lvars->sysfs_vars  = &osc_attr_group;
 	lvars->obd_vars    = lprocfs_osc_obd_vars;
 }

drivers/staging/lustre/sysfs-fs-lustre

@@ -391,7 +391,7 @@ Description:
 		Maximum number of readdir pages to fit into a single readdir
 		RPC.
 
-What:		/sys/fs/lustre/mdc/{connection_name}/max_rpcs_in_flight
+What:		/sys/fs/lustre/{mdc,osc}/{connection_name}/max_rpcs_in_flight
 Date:		May 2015
 Contact:	"Oleg Drokin" <oleg.drokin@intel.com>
 Description:
@@ -400,3 +400,108 @@ Description:
 		latency links, but has a chance of overloading a server
 		if you have too many clients like this.
 		Default: 8
+
+What:		/sys/fs/lustre/osc/{connection_name}/max_pages_per_rpc
+Date:		May 2015
+Contact:	"Oleg Drokin" <oleg.drokin@intel.com>
+Description:
+		Maximum number of pages to fit into a single RPC.
+		Typically bigger RPCs allow for better performance.
+		Default: however many pages to form 1M of data (256 pages
+		for 4K page sized platforms)
+
+What:		/sys/fs/lustre/osc/{connection_name}/active
+Date:		May 2015
+Contact:	"Oleg Drokin" <oleg.drokin@intel.com>
+Description:
+		Controls accessibility of this connection. If set to 0,
+		fail all accesses immediately.
+
+What:		/sys/fs/lustre/osc/{connection_name}/checksums
+Date:		May 2015
+Contact:	"Oleg Drokin" <oleg.drokin@intel.com>
+Description:
+		Controls whenever to checksum bulk RPC data over the wire
+		to this target.
+		1: enable (default) ; 0: disable
+
+What:		/sys/fs/lustre/osc/{connection_name}/contention_seconds
+Date:		May 2015
+Contact:	"Oleg Drokin" <oleg.drokin@intel.com>
+Description:
+		Controls for how long to consider a file contended once
+		indicated as such by the server.
+		When a file is considered contended, all operations switch to
+		synchronous lockless mode to avoid cache and lock pingpong.
+
+What:		/sys/fs/lustre/osc/{connection_name}/cur_dirty_bytes
+Date:		May 2015
+Contact:	"Oleg Drokin" <oleg.drokin@intel.com>
+Description:
+		Displays how many dirty bytes is presently in the cache for this
+		target.
+
+What:		/sys/fs/lustre/osc/{connection_name}/cur_grant_bytes
+Date:		May 2015
+Contact:	"Oleg Drokin" <oleg.drokin@intel.com>
+Description:
+		Shows how many bytes we have as a "dirty cache" grant from the
+		server. Writing a value smaller than shown allows to release
+		some grant back to the server.
+		Dirty cache grant is a way Lustre ensures that cached successful
+		writes on client do not end up discarded by the server due to
+		lack of space later on.
+
+What:		/sys/fs/lustre/osc/{connection_name}/cur_lost_grant_bytes
+Date:		May 2015
+Contact:	"Oleg Drokin" <oleg.drokin@intel.com>
+Description:
+		Shows how many granted bytes were released to the server due
+		to lack of write activity on this client.
+
+What:		/sys/fs/lustre/osc/{connection_name}/grant_shrink_interval
+Date:		May 2015
+Contact:	"Oleg Drokin" <oleg.drokin@intel.com>
+Description:
+		Number of seconds with no write activity for this target
+		to start releasing dirty grant back to the server.
+
+What:		/sys/fs/lustre/osc/{connection_name}/destroys_in_flight
+Date:		May 2015
+Contact:	"Oleg Drokin" <oleg.drokin@intel.com>
+Description:
+		Number of DESTROY RPCs currently in flight to this target.
+
+What:		/sys/fs/lustre/osc/{connection_name}/lockless_truncate
+Date:		May 2015
+Contact:	"Oleg Drokin" <oleg.drokin@intel.com>
+Description:
+		Controls whether lockless truncate RPCs are allowed to this
+		target.
+		Lockless truncate causes server to perform the locking which
+		is beneficial if the truncate is not followed by a write
+		immediately.
+		1: enable ; 0: disable (default)
+
+What:		/sys/fs/lustre/osc/{connection_name}/max_dirty_mb
+Date:		May 2015
+Contact:	"Oleg Drokin" <oleg.drokin@intel.com>
+Description:
+		Controls how much dirty data this client can accumulate
+		for this target. This is orthogonal to dirty grant and is
+		a hard limit even if the server would allow a bigger dirty
+		cache.
+		While allowing higher dirty cache is beneficial for write
+		performance, flushing write cache takes longer and as such
+		the node might be more prone to OOMs.
+		Having this value set too low might result in not being able
+		to sent too many parallel WRITE RPCs.
+		Default: 32
+
+What:		/sys/fs/lustre/osc/{connection_name}/resend_count
+Date:		May 2015
+Contact:	"Oleg Drokin" <oleg.drokin@intel.com>
+Description:
+		Controls how many times to try and resend RPCs to this target
+		that failed with "recoverable" status, such as EAGAIN,
+		ENOMEM.