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authorAl Viro <viro@zeniv.linux.org.uk>2008-04-28 04:15:49 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2008-04-28 06:28:37 -0400
commit8b67dca9420474623709e00d72a066068a502b20 (patch)
tree9d4dc19d849dd23cf00cee0851fd402062cdf1ea /kernel/auditsc.c
parent4a761b8c1d7a3a4ee7ccf92ce255d986f601e067 (diff)
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[PATCH] new predicate - AUDIT_FILETYPE
Argument is S_IF... | <index>, where index is normally 0 or 1. Triggers if chosen element of ctx->names[] is present and the mode of object in question matches the upper bits of argument. I.e. for things like "is the argument of that chmod a directory", etc. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/auditsc.c')
-rw-r--r--kernel/auditsc.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 091409996577..c10e7aae04d7 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -280,6 +280,19 @@ static int audit_match_perm(struct audit_context *ctx, int mask)
}
}
+static int audit_match_filetype(struct audit_context *ctx, int which)
+{
+ unsigned index = which & ~S_IFMT;
+ mode_t mode = which & S_IFMT;
+ if (index >= ctx->name_count)
+ return 0;
+ if (ctx->names[index].ino == -1)
+ return 0;
+ if ((ctx->names[index].mode ^ mode) & S_IFMT)
+ return 0;
+ return 1;
+}
+
/*
* We keep a linked list of fixed-sized (31 pointer) arrays of audit_chunk *;
* ->first_trees points to its beginning, ->trees - to the current end of data.
@@ -589,6 +602,9 @@ static int audit_filter_rules(struct task_struct *tsk,
case AUDIT_PERM:
result = audit_match_perm(ctx, f->val);
break;
+ case AUDIT_FILETYPE:
+ result = audit_match_filetype(ctx, f->val);
+ break;
}
if (!result)