lockd: Pass "struct sockaddr *" to new failover-by-IP function
Pass a more generic socket address type to nlmsvc_unlock_all_by_ip() to
allow for future support of IPv6. Also provide additional sanity
checking in failover_unlock_ip() when constructing the server's IP
address.
As an added bonus, provide clean kerneldoc comments on related NLM
interfaces which were recently added.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 2c2eb87..1955a27 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -310,9 +310,12 @@
static ssize_t failover_unlock_ip(struct file *file, char *buf, size_t size)
{
- __be32 server_ip;
- char *fo_path, c;
+ struct sockaddr_in sin = {
+ .sin_family = AF_INET,
+ };
int b1, b2, b3, b4;
+ char c;
+ char *fo_path;
/* sanity check */
if (size == 0)
@@ -326,11 +329,13 @@
return -EINVAL;
/* get ipv4 address */
- if (sscanf(fo_path, "%u.%u.%u.%u%c", &b1, &b2, &b3, &b4, &c) != 4)
+ if (sscanf(fo_path, NIPQUAD_FMT "%c", &b1, &b2, &b3, &b4, &c) != 4)
return -EINVAL;
- server_ip = htonl((((((b1<<8)|b2)<<8)|b3)<<8)|b4);
+ if (b1 > 255 || b2 > 255 || b3 > 255 || b4 > 255)
+ return -EINVAL;
+ sin.sin_addr.s_addr = htonl((b1 << 24) | (b2 << 16) | (b3 << 8) | b4);
- return nlmsvc_unlock_all_by_ip(server_ip);
+ return nlmsvc_unlock_all_by_ip((struct sockaddr *)&sin);
}
static ssize_t failover_unlock_fs(struct file *file, char *buf, size_t size)