Commit aaefed20 authored by Anand Jain's avatar Anand Jain Committed by David Sterba
Browse files

btrfs: add helper for string match ignoring leading/trailing whitespace 



Add a generic helper to match the string in a given buffer, and ignore
the leading and trailing whitespace.

Reviewed-by: default avatarJosef Bacik <josef@toxicpanda.com>
Signed-off-by: default avatarAnand Jain <anand.jain@oracle.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
[ rename variables, add comments ]
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 88090ad3

fs/btrfs/sysfs.c

+19 −0
Original line number Diff line number Diff line
@@ -888,6 +888,25 @@ static ssize_t btrfs_generation_show(struct kobject *kobj, 
}

BTRFS_ATTR(, generation, btrfs_generation_show);



/*

 * Look for an exact string @string in @buffer with possible leading or

 * trailing whitespace

 */

static bool strmatch(const char *buffer, const char *string)

{

	const size_t len = strlen(string);



	/* Skip leading whitespace */

	buffer = skip_spaces(buffer);



	/* Match entire string, check if the rest is whitespace or empty */

	if (strncmp(string, buffer, len) == 0 &&

	    strlen(skip_spaces(buffer + len)) == 0)

		return true;



	return false;

}



static const struct attribute *btrfs_attrs[] = {

	BTRFS_ATTR_PTR(, label),

	BTRFS_ATTR_PTR(, nodesize),