raspi/linux
1
0
Fork 1
mirror of https://github.com/raspberrypi/linux.git synced 2025-12-06 01:49:46 +00:00
Code Issues Projects Releases Wiki Activity

afs: Support the AFS dynamic root

Browse Source 
Support the AFS dynamic root which is a pseudo-volume that doesn't connect
to any server resource, but rather is just a root directory that
dynamically creates mountpoint directories where the name of such a
directory is the name of the cell.

Such a mount can be created thus:

	mount -t afs none /afs -o dyn

Dynamic root superblocks aren't shared except by bind mounts and
propagation.  Cell root volumes can then be mounted by referring to them by
name, e.g.:

	ls /afs/grand.central.org/
	ls /afs/.grand.central.org/

The kernel will upcall to consult the DNS if the address wasn't supplied
directly.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
2018-02-06 06:26:30 +00:00
parent 16280a15be
commit 4d673da145
7 changed files with 277 additions and 98 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
net/dns_resolver/dns_query.c
View File

@@ -52,11 +52,11 @@
* @name: Name to look up
* @namelen: Length of name
* @options: Request options (or NULL if no options)
* @_result: Where to place the returned data.
* @_result: Where to place the returned data (or NULL)
* @_expiry: Where to store the result expiry time (or NULL)
*
* The data will be returned in the pointer at *result, and the caller is
* responsible for freeing it.
* The data will be returned in the pointer at *result, if provided, and the
* caller is responsible for freeing it.
*
* The description should be of the form "[<query_type>:]<domain_name>", and
* the options need to be appropriate for the query type requested. If no
@@ -81,7 +81,7 @@ int dns_query(const char *type, const char *name, size_t namelen,
kenter("%s,%*.*s,%zu,%s",
type, (int)namelen, (int)namelen, name, namelen, options);
if (!name || namelen == 0 || !_result)
if (!name || namelen == 0)
return -EINVAL;
/* construct the query key description as "[<type>:]<name>" */
@@ -146,13 +146,15 @@ int dns_query(const char *type, const char *name, size_t namelen,
upayload = user_key_payload_locked(rkey);
len = upayload->datalen;
ret = -ENOMEM;
*_result = kmalloc(len + 1, GFP_KERNEL);
if (!*_result)
goto put;
if (_result) {
ret = -ENOMEM;
*_result = kmalloc(len + 1, GFP_KERNEL);
if (!*_result)
goto put;
memcpy(*_result, upayload->data, len);
(*_result)[len] = '\0';
memcpy(*_result, upayload->data, len);
(*_result)[len] = '\0';
}
if (_expiry)
*_expiry = rkey->expiry;