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Message-Id: <20241216-sysfs-const-bin_attr-scsi-v1-4-f0a5e54b3437@weissschuh.net>
Date: Mon, 16 Dec 2024 12:29:11 +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 04/11] scsi: esas2r: 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/esas2r/esas2r.h | 12 ++++++------
drivers/scsi/esas2r/esas2r_main.c | 32 ++++++++++++++++----------------
2 files changed, 22 insertions(+), 22 deletions(-)
diff --git a/drivers/scsi/esas2r/esas2r.h b/drivers/scsi/esas2r/esas2r.h
index 1e2d7c63a8e36a22bed3b365cd2e6eb81a3a4a1d..c48275d53aef3d45c0b8a1c38f5a21020ab33102 100644
--- a/drivers/scsi/esas2r/esas2r.h
+++ b/drivers/scsi/esas2r/esas2r.h
@@ -1411,11 +1411,11 @@ static inline void esas2r_comp_list_drain(struct esas2r_adapter *a,
}
/* sysfs handlers */
-extern struct bin_attribute bin_attr_fw;
-extern struct bin_attribute bin_attr_fs;
-extern struct bin_attribute bin_attr_vda;
-extern struct bin_attribute bin_attr_hw;
-extern struct bin_attribute bin_attr_live_nvram;
-extern struct bin_attribute bin_attr_default_nvram;
+extern const struct bin_attribute bin_attr_fw;
+extern const struct bin_attribute bin_attr_fs;
+extern const struct bin_attribute bin_attr_vda;
+extern const struct bin_attribute bin_attr_hw;
+extern const struct bin_attribute bin_attr_live_nvram;
+extern const struct bin_attribute bin_attr_default_nvram;
#endif /* ESAS2R_H */
diff --git a/drivers/scsi/esas2r/esas2r_main.c b/drivers/scsi/esas2r/esas2r_main.c
index f700a16cd88534c1edc9fb0ed8ed8b8d1db4fe51..44871746944ad0c0f30f28975ed40e0fde4e8d03 100644
--- a/drivers/scsi/esas2r/esas2r_main.c
+++ b/drivers/scsi/esas2r/esas2r_main.c
@@ -66,7 +66,7 @@ static struct esas2r_adapter *esas2r_adapter_from_kobj(struct kobject *kobj)
}
static ssize_t read_fw(struct file *file, struct kobject *kobj,
- struct bin_attribute *attr,
+ const struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
@@ -75,7 +75,7 @@ static ssize_t read_fw(struct file *file, struct kobject *kobj,
}
static ssize_t write_fw(struct file *file, struct kobject *kobj,
- struct bin_attribute *attr,
+ const struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
@@ -84,7 +84,7 @@ static ssize_t write_fw(struct file *file, struct kobject *kobj,
}
static ssize_t read_fs(struct file *file, struct kobject *kobj,
- struct bin_attribute *attr,
+ const struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
@@ -93,7 +93,7 @@ static ssize_t read_fs(struct file *file, struct kobject *kobj,
}
static ssize_t write_fs(struct file *file, struct kobject *kobj,
- struct bin_attribute *attr,
+ const struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
@@ -109,7 +109,7 @@ static ssize_t write_fs(struct file *file, struct kobject *kobj,
}
static ssize_t read_vda(struct file *file, struct kobject *kobj,
- struct bin_attribute *attr,
+ const struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
@@ -118,7 +118,7 @@ static ssize_t read_vda(struct file *file, struct kobject *kobj,
}
static ssize_t write_vda(struct file *file, struct kobject *kobj,
- struct bin_attribute *attr,
+ const struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
@@ -127,7 +127,7 @@ static ssize_t write_vda(struct file *file, struct kobject *kobj,
}
static ssize_t read_live_nvram(struct file *file, struct kobject *kobj,
- struct bin_attribute *attr,
+ const struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
@@ -138,7 +138,7 @@ static ssize_t read_live_nvram(struct file *file, struct kobject *kobj,
}
static ssize_t write_live_nvram(struct file *file, struct kobject *kobj,
- struct bin_attribute *attr,
+ const struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
@@ -158,7 +158,7 @@ static ssize_t write_live_nvram(struct file *file, struct kobject *kobj,
}
static ssize_t read_default_nvram(struct file *file, struct kobject *kobj,
- struct bin_attribute *attr,
+ const struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
@@ -169,7 +169,7 @@ static ssize_t read_default_nvram(struct file *file, struct kobject *kobj,
}
static ssize_t read_hw(struct file *file, struct kobject *kobj,
- struct bin_attribute *attr,
+ const struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
@@ -187,7 +187,7 @@ static ssize_t read_hw(struct file *file, struct kobject *kobj,
}
static ssize_t write_hw(struct file *file, struct kobject *kobj,
- struct bin_attribute *attr,
+ const struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
struct esas2r_adapter *a = esas2r_adapter_from_kobj(kobj);
@@ -211,12 +211,12 @@ static ssize_t write_hw(struct file *file, struct kobject *kobj,
}
#define ESAS2R_RW_BIN_ATTR(_name) \
- struct bin_attribute bin_attr_ ## _name = { \
+ const struct bin_attribute bin_attr_ ## _name = { \
.attr = \
{ .name = __stringify(_name), .mode = S_IRUSR | S_IWUSR }, \
.size = 0, \
- .read = read_ ## _name, \
- .write = write_ ## _name }
+ .read_new = read_ ## _name, \
+ .write_new = write_ ## _name }
ESAS2R_RW_BIN_ATTR(fw);
ESAS2R_RW_BIN_ATTR(fs);
@@ -224,10 +224,10 @@ ESAS2R_RW_BIN_ATTR(vda);
ESAS2R_RW_BIN_ATTR(hw);
ESAS2R_RW_BIN_ATTR(live_nvram);
-struct bin_attribute bin_attr_default_nvram = {
+const struct bin_attribute bin_attr_default_nvram = {
.attr = { .name = "default_nvram", .mode = S_IRUGO },
.size = 0,
- .read = read_default_nvram,
+ .read_new = read_default_nvram,
.write = NULL
};
--
2.47.1
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