linux-kernel - [PATCH 07/11] scsi: ipr: Constify 'struct bin

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Message-Id: <20241216-sysfs-const-bin_attr-scsi-v1-7-f0a5e54b3437@weissschuh.net>
Date: Mon, 16 Dec 2024 12:29:14 +0100
From: Thomas Weißschuh <linux@...ssschuh.net>
To: "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>, 
 "Martin K. Petersen" <martin.petersen@...cle.com>, 
 Adam Radford <aradford@...il.com>, 
 Bradley Grove <linuxdrivers@...otech.com>, 
 Tyrel Datwyler <tyreld@...ux.ibm.com>, 
 Michael Ellerman <mpe@...erman.id.au>, Nicholas Piggin <npiggin@...il.com>, 
 Christophe Leroy <christophe.leroy@...roup.eu>, 
 Naveen N Rao <naveen@...nel.org>, Madhavan Srinivasan <maddy@...ux.ibm.com>, 
 James Smart <james.smart@...adcom.com>, 
 Dick Kennedy <dick.kennedy@...adcom.com>, Brian King <brking@...ibm.com>, 
 Saurav Kashyap <skashyap@...vell.com>, Javed Hasan <jhasan@...vell.com>, 
 GR-QLogic-Storage-Upstream@...vell.com, Nilesh Javali <njavali@...vell.com>, 
 Manish Rangankar <mrangankar@...vell.com>
Cc: linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linuxppc-dev@...ts.ozlabs.org, 
 Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH 07/11] scsi: ipr: Constify 'struct bin_attribute'

The sysfs core now allows instances of 'struct bin_attribute' to be
moved into read-only memory. Make use of that to protect them against
accidental or malicious modifications.

Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
 drivers/scsi/ipr.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index 31cf2d31cceba090859c15f72f85fe7ca1698a55..db19888c5351a27d7560192339d2b9b533101e58 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -3366,7 +3366,7 @@ static void ipr_worker_thread(struct work_struct *work)
  *	number of bytes printed to buffer
  **/
 static ssize_t ipr_read_trace(struct file *filp, struct kobject *kobj,
-			      struct bin_attribute *bin_attr,
+			      const struct bin_attribute *bin_attr,
 			      char *buf, loff_t off, size_t count)
 {
 	struct device *dev = kobj_to_dev(kobj);
@@ -3383,13 +3383,13 @@ static ssize_t ipr_read_trace(struct file *filp, struct kobject *kobj,
 	return ret;
 }
 
-static struct bin_attribute ipr_trace_attr = {
+static const struct bin_attribute ipr_trace_attr = {
 	.attr =	{
 		.name = "trace",
 		.mode = S_IRUGO,
 	},
 	.size = 0,
-	.read = ipr_read_trace,
+	.read_new = ipr_read_trace,
 };
 #endif
 
@@ -4087,7 +4087,7 @@ static struct device_attribute ipr_ioa_fw_type_attr = {
 };
 
 static ssize_t ipr_read_async_err_log(struct file *filep, struct kobject *kobj,
-				struct bin_attribute *bin_attr, char *buf,
+				const struct bin_attribute *bin_attr, char *buf,
 				loff_t off, size_t count)
 {
 	struct device *cdev = kobj_to_dev(kobj);
@@ -4111,7 +4111,7 @@ static ssize_t ipr_read_async_err_log(struct file *filep, struct kobject *kobj,
 }
 
 static ssize_t ipr_next_async_err_log(struct file *filep, struct kobject *kobj,
-				struct bin_attribute *bin_attr, char *buf,
+				const struct bin_attribute *bin_attr, char *buf,
 				loff_t off, size_t count)
 {
 	struct device *cdev = kobj_to_dev(kobj);
@@ -4134,14 +4134,14 @@ static ssize_t ipr_next_async_err_log(struct file *filep, struct kobject *kobj,
 	return count;
 }
 
-static struct bin_attribute ipr_ioa_async_err_log = {
+static const struct bin_attribute ipr_ioa_async_err_log = {
 	.attr = {
 		.name =		"async_err_log",
 		.mode =		S_IRUGO | S_IWUSR,
 	},
 	.size = 0,
-	.read = ipr_read_async_err_log,
-	.write = ipr_next_async_err_log
+	.read_new = ipr_read_async_err_log,
+	.write_new = ipr_next_async_err_log
 };
 
 static struct attribute *ipr_ioa_attrs[] = {
@@ -4172,7 +4172,7 @@ ATTRIBUTE_GROUPS(ipr_ioa);
  *	number of bytes printed to buffer
  **/
 static ssize_t ipr_read_dump(struct file *filp, struct kobject *kobj,
-			     struct bin_attribute *bin_attr,
+			     const struct bin_attribute *bin_attr,
 			     char *buf, loff_t off, size_t count)
 {
 	struct device *cdev = kobj_to_dev(kobj);
@@ -4361,7 +4361,7 @@ static int ipr_free_dump(struct ipr_ioa_cfg *ioa_cfg)
  *	number of bytes printed to buffer
  **/
 static ssize_t ipr_write_dump(struct file *filp, struct kobject *kobj,
-			      struct bin_attribute *bin_attr,
+			      const struct bin_attribute *bin_attr,
 			      char *buf, loff_t off, size_t count)
 {
 	struct device *cdev = kobj_to_dev(kobj);
@@ -4385,14 +4385,14 @@ static ssize_t ipr_write_dump(struct file *filp, struct kobject *kobj,
 		return count;
 }
 
-static struct bin_attribute ipr_dump_attr = {
+static const struct bin_attribute ipr_dump_attr = {
 	.attr =	{
 		.name = "dump",
 		.mode = S_IRUSR | S_IWUSR,
 	},
 	.size = 0,
-	.read = ipr_read_dump,
-	.write = ipr_write_dump
+	.read_new = ipr_read_dump,
+	.write_new = ipr_write_dump
 };
 #else
 static int ipr_free_dump(struct ipr_ioa_cfg *ioa_cfg) { return 0; };

-- 
2.47.1