linux-kernel - [PATCH 11/11] scsi: qla4xxx: Constify 'struct bin

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Message-Id: <20241216-sysfs-const-bin_attr-scsi-v1-11-f0a5e54b3437@weissschuh.net>
Date: Mon, 16 Dec 2024 12:29:18 +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 11/11] scsi: qla4xxx: 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/qla4xxx/ql4_attr.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/scsi/qla4xxx/ql4_attr.c b/drivers/scsi/qla4xxx/ql4_attr.c
index abfa6ef604800aefef3dbc757d656b7dc20ede8c..e3f85d6ea0db25d5674ca69475af31a4267e2fdb 100644
--- a/drivers/scsi/qla4xxx/ql4_attr.c
+++ b/drivers/scsi/qla4xxx/ql4_attr.c
@@ -10,7 +10,7 @@

 static ssize_t
 qla4_8xxx_sysfs_read_fw_dump(struct file *filep, struct kobject *kobj,
-			     struct bin_attribute *ba, char *buf, loff_t off,
+			     const struct bin_attribute *ba, char *buf, loff_t off,
 			     size_t count)
 {
 	struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
@@ -28,7 +28,7 @@ qla4_8xxx_sysfs_read_fw_dump(struct file *filep, struct kobject *kobj,

 static ssize_t
 qla4_8xxx_sysfs_write_fw_dump(struct file *filep, struct kobject *kobj,
-			      struct bin_attribute *ba, char *buf, loff_t off,
+			      const struct bin_attribute *ba, char *buf, loff_t off,
 			      size_t count)
 {
 	struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
@@ -104,19 +104,19 @@ qla4_8xxx_sysfs_write_fw_dump(struct file *filep, struct kobject *kobj,
 	return count;
 }

-static struct bin_attribute sysfs_fw_dump_attr = {
+static const struct bin_attribute sysfs_fw_dump_attr = {
 	.attr = {
 		.name = "fw_dump",
 		.mode = S_IRUSR | S_IWUSR,
 	},
 	.size = 0,
-	.read = qla4_8xxx_sysfs_read_fw_dump,
-	.write = qla4_8xxx_sysfs_write_fw_dump,
+	.read_new = qla4_8xxx_sysfs_read_fw_dump,
+	.write_new = qla4_8xxx_sysfs_write_fw_dump,
 };

 static struct sysfs_entry {
 	char *name;
-	struct bin_attribute *attr;
+	const struct bin_attribute *attr;
 } bin_file_entries[] = {
 	{ "fw_dump", &sysfs_fw_dump_attr },
 	{ NULL },

-- 
2.47.1