smack: implement logging V3

[pandora-kernel.git] / security / smack / smackfs.c

diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index e03a7e1..904af34 100644 (file)
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -41,6 +41,7 @@ enum smk_inos {
        SMK_AMBIENT     = 7,    /* internet ambient label */
        SMK_NETLBLADDR  = 8,    /* single label hosts */
        SMK_ONLYCAP     = 9,    /* the only "capable" label */
+       SMK_LOGGING     = 10,   /* logging */
 };
 
 /*
@@ -1191,6 +1192,69 @@ static const struct file_operations smk_onlycap_ops = {
        .write          = smk_write_onlycap,
 };
 
+/**
+ * smk_read_logging - read() for /smack/logging
+ * @filp: file pointer, not actually used
+ * @buf: where to put the result
+ * @cn: maximum to send along
+ * @ppos: where to start
+ *
+ * Returns number of bytes read or error code, as appropriate
+ */
+static ssize_t smk_read_logging(struct file *filp, char __user *buf,
+                               size_t count, loff_t *ppos)
+{
+       char temp[32];
+       ssize_t rc;
+
+       if (*ppos != 0)
+               return 0;
+
+       sprintf(temp, "%d\n", log_policy);
+       rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
+       return rc;
+}
+
+/**
+ * smk_write_logging - write() for /smack/logging
+ * @file: file pointer, not actually used
+ * @buf: where to get the data from
+ * @count: bytes sent
+ * @ppos: where to start
+ *
+ * Returns number of bytes written or error code, as appropriate
+ */
+static ssize_t smk_write_logging(struct file *file, const char __user *buf,
+                               size_t count, loff_t *ppos)
+{
+       char temp[32];
+       int i;
+
+       if (!capable(CAP_MAC_ADMIN))
+               return -EPERM;
+
+       if (count >= sizeof(temp) || count == 0)
+               return -EINVAL;
+
+       if (copy_from_user(temp, buf, count) != 0)
+               return -EFAULT;
+
+       temp[count] = '\0';
+
+       if (sscanf(temp, "%d", &i) != 1)
+               return -EINVAL;
+       if (i < 0 || i > 3)
+               return -EINVAL;
+       log_policy = i;
+       return count;
+}
+
+
+
+static const struct file_operations smk_logging_ops = {
+       .read           = smk_read_logging,
+       .write          = smk_write_logging,
+};
 /**
  * smk_fill_super - fill the /smackfs superblock
  * @sb: the empty superblock
@@ -1221,6 +1285,8 @@ static int smk_fill_super(struct super_block *sb, void *data, int silent)
                        {"netlabel", &smk_netlbladdr_ops, S_IRUGO|S_IWUSR},
                [SMK_ONLYCAP]   =
                        {"onlycap", &smk_onlycap_ops, S_IRUGO|S_IWUSR},
+               [SMK_LOGGING]   =
+                       {"logging", &smk_logging_ops, S_IRUGO|S_IWUSR},
                /* last one */ {""}
        };