3rd-party/linux-kernel-module-cheat
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pci negator working, factorial not

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This commit is contained in:
Ciro Santilli
2017-06-17 13:15:49 +01:00
parent f662a9105f
commit f48c636577
9 changed files with 242 additions and 242 deletions
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34
kernel_module/fops.c
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@@ -33,7 +33,7 @@ static char data[] = {'a', 'b', 'c', 'd'};
static int open(struct inode *inode, struct file *filp)
{
printk(KERN_INFO "open\n");
pr_info("open\n");
return 0;
}
@@ -45,9 +45,10 @@ static int open(struct inode *inode, struct file *filp)
static ssize_t read(struct file *filp, char __user *buf, size_t len, loff_t *off)
{
ssize_t ret;
printk(KERN_INFO "read\n");
printk(KERN_INFO "len = %zu\n", len);
printk(KERN_INFO "off = %lld\n", (long long)*off);
pr_info("read\n");
pr_info("len = %zu\n", len);
pr_info("off = %lld\n", (long long)*off);
if (sizeof(data) <= *off) {
ret = 0;
} else {
@@ -58,8 +59,8 @@ static ssize_t read(struct file *filp, char __user *buf, size_t len, loff_t *off
*off += ret;
}
}
printk(KERN_INFO "buf = %.*s\n", (int)len, buf);
printk(KERN_INFO "ret = %lld\n", (long long)ret);
pr_info("buf = %.*s\n", (int)len, buf);
pr_info("ret = %lld\n", (long long)ret);
return ret;
}
@@ -70,9 +71,10 @@ static ssize_t read(struct file *filp, char __user *buf, size_t len, loff_t *off
static ssize_t write(struct file *filp, const char __user *buf, size_t len, loff_t *off)
{
ssize_t ret;
printk(KERN_INFO "write\n");
printk(KERN_INFO "len = %zu\n", len);
printk(KERN_INFO "off = %lld\n", (long long)*off);
pr_info("write\n");
pr_info("len = %zu\n", len);
pr_info("off = %lld\n", (long long)*off);
if (sizeof(data) <= *off) {
ret = 0;
} else {
@@ -83,12 +85,12 @@ static ssize_t write(struct file *filp, const char __user *buf, size_t len, loff
ret = -EFAULT;
} else {
ret = len;
printk(KERN_INFO "buf = %.*s\n", (int)len, data + *off);
pr_info("buf = %.*s\n", (int)len, data + *off);
*off += ret;
}
}
}
printk(KERN_INFO "ret = %lld\n", (long long)ret);
pr_info("ret = %lld\n", (long long)ret);
return ret;
}
@@ -98,17 +100,17 @@ http://stackoverflow.com/questions/11393674/why-is-the-close-function-is-called-
*/
static int release(struct inode *inode, struct file *filp)
{
printk(KERN_INFO "release\n");
pr_info("release\n");
return 0;
}
static loff_t llseek(struct file *filp, loff_t off, int whence)
{
loff_t newpos;
printk(KERN_INFO "llseek\n");
printk(KERN_INFO "off = %lld\n", (long long)off);
printk(KERN_INFO "whence = %lld\n", (long long)whence);
pr_info("llseek\n");
pr_info("off = %lld\n", (long long)off);
pr_info("whence = %lld\n", (long long)whence);
switch(whence) {
case SEEK_SET:
newpos = off;
@@ -124,7 +126,7 @@ static loff_t llseek(struct file *filp, loff_t off, int whence)
}
if (newpos < 0) return -EINVAL;
filp->f_pos = newpos;
printk(KERN_INFO "newpos = %lld\n", (long long)newpos);
pr_info("newpos = %lld\n", (long long)newpos);
return newpos;
}