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audit: optimize audit_compare_dname_path

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In the cases where we already know the length of the parent, pass it as
a parm so we don't need to recompute it. In the cases where we don't
know the length, pass in AUDIT_NAME_FULL (-1) to indicate that it should
be determined.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Jeff Layton
2012-10-10 15:25:25 -04:00
committed by Al Viro
parent 29e9a3467c
commit e3d6b07b8b
4 changed files with 20 additions and 12 deletions
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16
kernel/auditfilter.c
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@ -1328,11 +1328,17 @@ int parent_len(const char *path)
return p - path;
}
/* Compare given dentry name with last component in given path,
* return of 0 indicates a match. */
int audit_compare_dname_path(const char *dname, const char *path)
/**
* audit_compare_dname_path - compare given dentry name with last component in
* given path. Return of 0 indicates a match.
* @dname: dentry name that we're comparing
* @path: full pathname that we're comparing
* @parentlen: length of the parent if known. Passing in AUDIT_NAME_FULL
* here indicates that we must compute this value.
*/
int audit_compare_dname_path(const char *dname, const char *path, int parentlen)
{
int dlen, pathlen, parentlen;
int dlen, pathlen;
const char *p;
dlen = strlen(dname);
@ -1340,7 +1346,7 @@ int audit_compare_dname_path(const char *dname, const char *path)
if (pathlen < dlen)
return 1;
parentlen = parent_len(path);
parentlen = parentlen == AUDIT_NAME_FULL ? parent_len(path) : parentlen;
if (pathlen - parentlen != dlen)
return 1;