bitmap_parse_user (9) - Linux Manuals

bitmap_parse_user: convert an ASCII hex string in a user buffer into a bitmap

Command to display bitmap_parse_user manual in Linux: $ man 9 bitmap_parse_user

NAME

bitmap_parse_user - convert an ASCII hex string in a user buffer into a bitmap

SYNOPSIS

int bitmap_parse_user(const char __user * ubuf, unsigned int ulen, unsigned long * maskp, int nmaskbits);

ARGUMENTS

ubuf

: pointer to user buffer containing string.

ulen

: buffer size in bytes. If string is smaller than this then it must be terminated with a \0.

maskp

: pointer to bitmap array that will contain result.

nmaskbits

: size of bitmap, in bits.

DESCRIPTION

Wrapper for __bitmap_parse, providing it with user buffer.

We cannot have this as an inline function in bitmap.h because it needs linux/uaccess.h to get the access_ok declaration and this causes cyclic dependencies.