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LinuxKPI: Add DEFINE_DEBUGFS_ATTRIBUTE_SIGNED to linux/debugfs.h

Browse source 
Sponsored by:	Serenity CyberSecurity, LLC
MFC after:	1 week
Reviewed by:	manu
Differential Revision:	https://reviews.freebsd.org/D45615

(cherry picked from commit 8c5c572125665e3fd8a033d1a8b0a370e5a43e24)
This commit is contained in:
Vladimir Kondratyev 2024-06-26 23:51:34 +03:00
parent 3eb0293692
commit 88ca9c8226
3 changed files with 35 additions and 6 deletions
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2
sys/compat/linuxkpi/common/include/linux/debugfs.h
View file

@ -88,6 +88,8 @@ void debugfs_remove_recursive(struct dentry *dentry);
#define DEFINE_DEBUGFS_ATTRIBUTE(__fops, __get, __set, __fmt) \
DEFINE_SIMPLE_ATTRIBUTE(__fops, __get, __set, __fmt)
#define DEFINE_DEBUGFS_ATTRIBUTE_SIGNED(__fops, __get, __set, __fmt) \
DEFINE_SIMPLE_ATTRIBUTE_SIGNED(__fops, __get, __set, __fmt)
void debugfs_create_bool(const char *name, umode_t mode, struct dentry *parent,
bool *value);

12
sys/compat/linuxkpi/common/include/linux/fs.h
View file

@ -375,7 +375,7 @@ simple_read_from_buffer(void __user *dest, size_t read_size, loff_t *ppos,
MALLOC_DECLARE(M_LSATTR);
#define DEFINE_SIMPLE_ATTRIBUTE(__fops, __get, __set, __fmt) \
#define __DEFINE_SIMPLE_ATTRIBUTE(__fops, __get, __set, __fmt, __wrfunc)\
static inline int \
__fops ## _open(struct inode *inode, struct file *filp) \
{ \
@ -386,10 +386,15 @@ static const struct file_operations __fops = { \
.open = __fops ## _open, \
.release = simple_attr_release, \
.read = simple_attr_read, \
.write = simple_attr_write, \
.write = __wrfunc, \
.llseek = no_llseek \
}
#define DEFINE_SIMPLE_ATTRIBUTE(fops, get, set, fmt) \
__DEFINE_SIMPLE_ATTRIBUTE(fops, get, set, fmt, simple_attr_write)
#define DEFINE_SIMPLE_ATTRIBUTE_SIGNED(fops, get, set, fmt) \
__DEFINE_SIMPLE_ATTRIBUTE(fops, get, set, fmt, simple_attr_write_signed)
int simple_attr_open(struct inode *inode, struct file *filp,
int (*get)(void *, uint64_t *), int (*set)(void *, uint64_t),
const char *fmt);
@ -400,4 +405,7 @@ ssize_t simple_attr_read(struct file *filp, char *buf, size_t read_size, loff_t
ssize_t simple_attr_write(struct file *filp, const char *buf, size_t write_size, loff_t *ppos);
ssize_t simple_attr_write_signed(struct file *filp, const char *buf,
size_t write_size, loff_t *ppos);
#endif /* _LINUXKPI_LINUX_FS_H_ */

27
sys/compat/linuxkpi/common/src/linux_simple_attr.c
View file

@ -139,12 +139,13 @@ unlock:
}
/*
* simple_attr_write: write contents of buffer into simple attribute file
* simple_attr_write_common: write contents of buffer into simple attribute file
*
* @filp: file pointer
* @buf: kernel space buffer
* @write_size: number bytes to be transferred
* @ppos: starting pointer position for transfer
* @is_signed: signedness of data in @buf
*
* The simple_attr structure is stored in filp->private_data.
* Convert the @buf string to unsigned long long.
@ -154,8 +155,9 @@ unlock:
* On success, number of bytes written to simple attr
* On failure, negative signed ERRNO
*/
ssize_t
simple_attr_write(struct file *filp, const char *buf, size_t write_size, loff_t *ppos)
static ssize_t
simple_attr_write_common(struct file *filp, const char *buf, size_t write_size,
loff_t *ppos, bool is_signed)
{
struct simple_attr *sattr;
unsigned long long data;
@ -173,7 +175,10 @@ simple_attr_write(struct file *filp, const char *buf, size_t write_size, loff_t
mutex_lock(&sattr->mutex);
ret = kstrtoull(buf + *ppos, 0, &data);
if (is_signed)
ret = kstrtoll(buf + *ppos, 0, &data);
else
ret = kstrtoull(buf + *ppos, 0, &data);
if (ret)
goto unlock;
@ -187,3 +192,17 @@ unlock:
mutex_unlock(&sattr->mutex);
return (ret);
}
ssize_t
simple_attr_write(struct file *filp, const char *buf, size_t write_size,
loff_t *ppos)
{
return (simple_attr_write_common(filp, buf, write_size, ppos, false));
}
ssize_t
simple_attr_write_signed(struct file *filp, const char *buf, size_t write_size,
loff_t *ppos)
{
return (simple_attr_write_common(filp, buf, write_size, ppos, true));
}