Commit 1d31aa17 authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Linus Torvalds
Browse files

seq_file: introduce seq_escape_mem() 

Introduce seq_escape_mem() to allow users to pass additional parameters to
string_escape_mem().

Link: https://lkml.kernel.org/r/20210504180819.73127-12-andriy.shevchenko@linux.intel.com


Suggested-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent be613b40

fs/seq_file.c

+25 −0
Original line number Diff line number Diff line
@@ -355,6 +355,31 @@ int seq_release(struct inode *inode, struct file *file) 
}

EXPORT_SYMBOL(seq_release);



/**

 * seq_escape_mem - print data into buffer, escaping some characters

 * @m: target buffer

 * @src: source buffer

 * @len: size of source buffer

 * @flags: flags to pass to string_escape_mem()

 * @esc: set of characters that need escaping

 *

 * Puts data into buffer, replacing each occurrence of character from

 * given class (defined by @flags and @esc) with printable escaped sequence.

 *

 * Use seq_has_overflowed() to check for errors.

 */

void seq_escape_mem(struct seq_file *m, const char *src, size_t len,

		    unsigned int flags, const char *esc)

{

	char *buf;

	size_t size = seq_get_buf(m, &buf);

	int ret;



	ret = string_escape_mem(src, len, buf, size, flags, esc);

	seq_commit(m, ret < size ? ret : -1);

}

EXPORT_SYMBOL(seq_escape_mem);



/**

 *	seq_escape -	print string into buffer, escaping some characters

 *	@m:	target buffer

include/linux/seq_file.h

+2 −0
Original line number Diff line number Diff line
@@ -126,6 +126,8 @@ void seq_put_decimal_ll(struct seq_file *m, const char *delimiter, long long num 
void seq_put_hex_ll(struct seq_file *m, const char *delimiter,

		    unsigned long long v, unsigned int width);



void seq_escape_mem(struct seq_file *m, const char *src, size_t len,

		    unsigned int flags, const char *esc);

void seq_escape(struct seq_file *m, const char *s, const char *esc);

void seq_escape_mem_ascii(struct seq_file *m, const char *src, size_t isz);