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authorDavid Howells <dhowells@redhat.com>2007-04-26 15:58:17 -0700
committerDavid S. Miller <davem@davemloft.net>2007-04-26 15:58:17 -0700
commitb908fe6b2d1294d93b0d0badf6bf4f9a2cd7d729 (patch)
treea0ccc4a21752f69991f762faea7c1b40510dbb4c /fs/afs/internal.h
parent0795e7c031c4bda46fbdde678adf29de19bef7f4 (diff)
[AFS]: Add support for the CB.GetCapabilities operation.
Add support for the CB.GetCapabilities operation with which the fileserver can ask the client for the following information: (1) The list of network interfaces it has available as IPv4 address + netmask plus the MTUs. (2) The client's UUID. (3) The extended capabilities of the client, for which the only current one is unified error mapping (abort code interpretation). To support this, the patch adds the following routines to AFS: (1) A function to iterate through all the network interfaces using RTNETLINK to extract IPv4 addresses and MTUs. (2) A function to iterate through all the network interfaces using RTNETLINK to pull out the MAC address of the lowest index interface to use in UUID construction. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'fs/afs/internal.h')
-rw-r--r--fs/afs/internal.h42
1 files changed, 42 insertions, 0 deletions
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index 8bed2429d01f..6120d4bd19e0 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -346,6 +346,40 @@ struct afs_permits {
struct afs_permit permits[0]; /* the permits so far examined */
};
+/*
+ * record of one of a system's set of network interfaces
+ */
+struct afs_interface {
+ unsigned index; /* interface index */
+ struct in_addr address; /* IPv4 address bound to interface */
+ struct in_addr netmask; /* netmask applied to address */
+ unsigned mtu; /* MTU of interface */
+};
+
+/*
+ * UUID definition [internet draft]
+ * - the timestamp is a 60-bit value, split 32/16/12, and goes in 100ns
+ * increments since midnight 15th October 1582
+ * - add AFS_UUID_TO_UNIX_TIME to convert unix time in 100ns units to UUID
+ * time
+ * - the clock sequence is a 14-bit counter to avoid duplicate times
+ */
+struct afs_uuid {
+ u32 time_low; /* low part of timestamp */
+ u16 time_mid; /* mid part of timestamp */
+ u16 time_hi_and_version; /* high part of timestamp and version */
+#define AFS_UUID_TO_UNIX_TIME 0x01b21dd213814000
+#define AFS_UUID_TIMEHI_MASK 0x0fff
+#define AFS_UUID_VERSION_TIME 0x1000 /* time-based UUID */
+#define AFS_UUID_VERSION_NAME 0x3000 /* name-based UUID */
+#define AFS_UUID_VERSION_RANDOM 0x4000 /* (pseudo-)random generated UUID */
+ u8 clock_seq_hi_and_reserved; /* clock seq hi and variant */
+#define AFS_UUID_CLOCKHI_MASK 0x3f
+#define AFS_UUID_VARIANT_STD 0x80
+ u8 clock_seq_low; /* clock seq low */
+ u8 node[6]; /* spatially unique node ID (MAC addr) */
+};
+
/*****************************************************************************/
/*
* callback.c
@@ -430,6 +464,7 @@ extern void afs_clear_inode(struct inode *);
/*
* main.c
*/
+extern struct afs_uuid afs_uuid;
#ifdef AFS_CACHING_SUPPORT
extern struct cachefs_netfs afs_cache_netfs;
#endif
@@ -470,6 +505,7 @@ extern struct afs_call *afs_alloc_flat_call(const struct afs_call_type *,
extern void afs_flat_call_destructor(struct afs_call *);
extern void afs_transfer_reply(struct afs_call *, struct sk_buff *);
extern void afs_send_empty_reply(struct afs_call *);
+extern void afs_send_simple_reply(struct afs_call *, const void *, size_t);
extern int afs_extract_data(struct afs_call *, struct sk_buff *, bool, void *,
size_t);
@@ -501,6 +537,12 @@ extern int afs_fs_init(void);
extern void afs_fs_exit(void);
/*
+ * use-rtnetlink.c
+ */
+extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool);
+extern int afs_get_MAC_address(u8 [6]);
+
+/*
* vlclient.c
*/
#ifdef AFS_CACHING_SUPPORT