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[AFS]: Add support for the CB.GetCapabilities operation.

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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>
This commit is contained in:
David Howells
2007-04-26 15:58:17 -07:00
committed by David S. Miller
parent 0795e7c031
commit b908fe6b2d
7 changed files with 705 additions and 0 deletions
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49
fs/afs/main.c
View File

@@ -40,6 +40,51 @@ struct cachefs_netfs afs_cache_netfs = {
};
#endif
struct afs_uuid afs_uuid;
/*
* get a client UUID
*/
static int __init afs_get_client_UUID(void)
{
struct timespec ts;
u64 uuidtime;
u16 clockseq;
int ret;
/* read the MAC address of one of the external interfaces and construct
* a UUID from it */
ret = afs_get_MAC_address(afs_uuid.node);
if (ret < 0)
return ret;
getnstimeofday(&ts);
uuidtime = (u64) ts.tv_sec * 1000 * 1000 * 10;
uuidtime += ts.tv_nsec / 100;
uuidtime += AFS_UUID_TO_UNIX_TIME;
afs_uuid.time_low = uuidtime;
afs_uuid.time_mid = uuidtime >> 32;
afs_uuid.time_hi_and_version = (uuidtime >> 48) & AFS_UUID_TIMEHI_MASK;
afs_uuid.time_hi_and_version = AFS_UUID_VERSION_TIME;
get_random_bytes(&clockseq, 2);
afs_uuid.clock_seq_low = clockseq;
afs_uuid.clock_seq_hi_and_reserved =
(clockseq >> 8) & AFS_UUID_CLOCKHI_MASK;
afs_uuid.clock_seq_hi_and_reserved = AFS_UUID_VARIANT_STD;
_debug("AFS UUID: %08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
afs_uuid.time_low,
afs_uuid.time_mid,
afs_uuid.time_hi_and_version,
afs_uuid.clock_seq_hi_and_reserved,
afs_uuid.clock_seq_low,
afs_uuid.node[0], afs_uuid.node[1], afs_uuid.node[2],
afs_uuid.node[3], afs_uuid.node[4], afs_uuid.node[5]);
return 0;
}
/*
* initialise the AFS client FS module
*/
@@ -49,6 +94,10 @@ static int __init afs_init(void)
printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n");
ret = afs_get_client_UUID();
if (ret < 0)
return ret;
/* register the /proc stuff */
ret = afs_proc_init();
if (ret < 0)