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AFS: AFS fixups

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Make some miscellaneous changes to the AFS filesystem:

 (1) Assert RCU barriers on module exit to make sure RCU has finished with
     callbacks in this module.

 (2) Correctly handle the AFS server returning a zero-length read.

 (3) Split out data zapping calls into one function (afs_zap_data).

 (4) Rename some afs_file_*() functions to afs_*() where they apply to
     non-regular files too.

 (5) Be consistent about the presentation of volume ID:vnode ID in debugging
     output.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Howells
2007-05-09 02:33:45 -07:00
committed by Linus Torvalds
parent ef71c15c46
commit 416351f28d
12 changed files with 121 additions and 109 deletions
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37
fs/afs/fsclient.c
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@@ -206,7 +206,7 @@ int afs_fs_fetch_file_status(struct afs_server *server,
struct afs_call *call;
__be32 *bp;
_enter(",%x,{%x:%d},,",
_enter(",%x,{%x:%u},,",
key_serial(key), vnode->fid.vid, vnode->fid.vnode);
call = afs_alloc_flat_call(&afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4);
@@ -265,25 +265,20 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call,
call->offset = 0;
call->unmarshall++;
if (call->count < PAGE_SIZE) {
page = call->reply3;
buffer = kmap_atomic(page, KM_USER0);
memset(buffer + PAGE_SIZE - call->count, 0,
call->count);
kunmap_atomic(buffer, KM_USER0);
}
/* extract the returned data */
case 2:
_debug("extract data");
page = call->reply3;
buffer = kmap_atomic(page, KM_USER0);
ret = afs_extract_data(call, skb, last, buffer, call->count);
kunmap_atomic(buffer, KM_USER0);
switch (ret) {
case 0: break;
case -EAGAIN: return 0;
default: return ret;
if (call->count > 0) {
page = call->reply3;
buffer = kmap_atomic(page, KM_USER0);
ret = afs_extract_data(call, skb, last, buffer,
call->count);
kunmap_atomic(buffer, KM_USER0);
switch (ret) {
case 0: break;
case -EAGAIN: return 0;
default: return ret;
}
}
call->offset = 0;
@@ -318,6 +313,14 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call,
if (!last)
return 0;
if (call->count < PAGE_SIZE) {
_debug("clear");
page = call->reply3;
buffer = kmap_atomic(page, KM_USER0);
memset(buffer + call->count, 0, PAGE_SIZE - call->count);
kunmap_atomic(buffer, KM_USER0);
}
_leave(" = 0 [done]");
return 0;
}