diff options
| author |   Pavel Shilovsky <pshilov@microsoft.com> | 2019-01-22 16:50:21 -0800 |
|---|---|---|
| committer |   Steve French <stfrench@microsoft.com> | 2019-01-24 14:52:06 -0600 |
| commit | 3d3003fce8e837acc4e3960fe3cbabebc356dcb5 (patch) | |
| tree | 45c36004bb21d46ef0a922a5e160a6623ae66338 /fs | |
| parent | CIFS: Fix credit calculation for encrypted reads with errors (diff) | |
| download | linux-dev-3d3003fce8e837acc4e3960fe3cbabebc356dcb5.tar.xz linux-dev-3d3003fce8e837acc4e3960fe3cbabebc356dcb5.zip | |
CIFS: Fix credit calculations in compound mid callback
The current code doesn't do proper accounting for credits
in SMB1 case: it adds one credit per response only if we get
a complete response while it needs to return it unconditionally.
Fix this and also include malformed responses for SMB2+ into
accounting for credits because such responses have Credit
Granted field, thus nothing prevents to get a proper credit
value from them.
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/cifs/smb2ops.c | 6 | ||||
| -rw-r--r-- | fs/cifs/transport.c | 11 |
2 files changed, 6 insertions, 11 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index 73f9c6af4065..153238fc4fa9 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -154,7 +154,11 @@ smb2_get_credits(struct mid_q_entry *mid) { struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)mid->resp_buf; - return le16_to_cpu(shdr->CreditRequest); + if (mid->mid_state == MID_RESPONSE_RECEIVED + || mid->mid_state == MID_RESPONSE_MALFORMED) + return le16_to_cpu(shdr->CreditRequest); + + return 0; } static int diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index 202e0e84efdd..53532bd3f50d 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -786,17 +786,8 @@ static void cifs_compound_callback(struct mid_q_entry *mid) { struct TCP_Server_Info *server = mid->server; - unsigned int optype = mid->optype; - unsigned int credits_received = 0; - if (mid->mid_state == MID_RESPONSE_RECEIVED) { - if (mid->resp_buf) - credits_received = server->ops->get_credits(mid); - else - cifs_dbg(FYI, "Bad state for cancelled MID\n"); - } - - add_credits(server, credits_received, optype); + add_credits(server, server->ops->get_credits(mid), mid->optype); } static void |