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Commit 7b11f69f authored by Kris Katterjohn's avatar Kris Katterjohn Committed by David S. Miller
Browse files

[NET]: Clean up comments for sk_chk_filter() 



This removes redundant comments, and moves one comment to a better
location.

Signed-off-by: default avatarKris Katterjohn <kjak@users.sourceforge.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 46b86a2d

net/core/filter.c

+3 −7
Original line number Diff line number Diff line
@@ -287,7 +287,9 @@ load_b: 
 * no references or jumps that are out of range, no illegal

 * instructions, and must end with a RET instruction.

 *

 * Returns 0 if the rule set is legal or a negative errno code if not.

 * All jumps are forward as they are not signed.

 *

 * Returns 0 if the rule set is legal or -EINVAL if not.

 */

int sk_chk_filter(struct sock_filter *filter, int flen)

{
@@ -299,7 +301,6 @@ int sk_chk_filter(struct sock_filter *filter, int flen) 


	/* check the filter code now */

	for (pc = 0; pc < flen; pc++) {

		/* all jumps are forward as they are not signed */

		ftest = &filter[pc];



		/* Only allow valid instructions */
@@ -383,11 +384,6 @@ int sk_chk_filter(struct sock_filter *filter, int flen) 
		}

	}



	/*

	 * The program must end with a return. We don't care where they

	 * jumped within the script (its always forwards) but in the end

	 * they _will_ hit this.

	 */

        return (BPF_CLASS(filter[flen - 1].code) == BPF_RET) ? 0 : -EINVAL;

}