diff options
| author | Pavel Shilovsky <pshilov@microsoft.com> | 2019-01-15 15:08:48 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-20 10:25:44 +0100 |
| commit | b1765ebd9d12c3aa46e1c94764723a373ad57341 (patch) | |
| tree | 1c4b9b0c2ab8b4024f485ac8983a972514572f35 /fs/cifs | |
| parent | 6804b3ecbe20654891324ef82f840ba02d642d6c (diff) | |
| download | linux-stable-b1765ebd9d12c3aa46e1c94764723a373ad57341.tar.gz linux-stable-b1765ebd9d12c3aa46e1c94764723a373ad57341.tar.bz2 linux-stable-b1765ebd9d12c3aa46e1c94764723a373ad57341.zip | |
CIFS: Do not assume one credit for async responses
[ Upstream commit 0fd1d37b0501efc6e295f56ab55cdaff784aa50c ]
If we don't receive a response we can't assume that the server
granted one credit. Assume zero credits in such cases.
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs/cifs')
| -rw-r--r-- | fs/cifs/smb2pdu.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 8a01e89ff827..1e5a1171212f 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -2814,9 +2814,10 @@ smb2_echo_callback(struct mid_q_entry *mid) { struct TCP_Server_Info *server = mid->callback_data; struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf; - unsigned int credits_received = 1; + unsigned int credits_received = 0; - if (mid->mid_state == MID_RESPONSE_RECEIVED) + if (mid->mid_state == MID_RESPONSE_RECEIVED + || mid->mid_state == MID_RESPONSE_MALFORMED) credits_received = le16_to_cpu(rsp->sync_hdr.CreditRequest); DeleteMidQEntry(mid); @@ -3073,7 +3074,7 @@ smb2_readv_callback(struct mid_q_entry *mid) struct TCP_Server_Info *server = tcon->ses->server; struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)rdata->iov[0].iov_base; - unsigned int credits_received = 1; + unsigned int credits_received = 0; struct smb_rqst rqst = { .rq_iov = rdata->iov, .rq_nvec = 2, .rq_pages = rdata->pages, @@ -3112,6 +3113,9 @@ smb2_readv_callback(struct mid_q_entry *mid) task_io_account_read(rdata->got_bytes); cifs_stats_bytes_read(tcon, rdata->got_bytes); break; + case MID_RESPONSE_MALFORMED: + credits_received = le16_to_cpu(shdr->CreditRequest); + /* fall through */ default: if (rdata->result != -ENODATA) rdata->result = -EIO; @@ -3305,7 +3309,7 @@ smb2_writev_callback(struct mid_q_entry *mid) struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); unsigned int written; struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf; - unsigned int credits_received = 1; + unsigned int credits_received = 0; switch (mid->mid_state) { case MID_RESPONSE_RECEIVED: @@ -3333,6 +3337,9 @@ smb2_writev_callback(struct mid_q_entry *mid) case MID_RETRY_NEEDED: wdata->result = -EAGAIN; break; + case MID_RESPONSE_MALFORMED: + credits_received = le16_to_cpu(rsp->sync_hdr.CreditRequest); + /* fall through */ default: wdata->result = -EIO; break; |