From: Ronnie Sahlberg lsahlber@redhat.com
[ Upstream commit eca004523811f816bcfca3046ab54e1278e0973b ]
We should add any credits granted to us from unmatched server responses.
Signed-off-by: Ronnie Sahlberg lsahlber@redhat.com Signed-off-by: Steve French stfrench@microsoft.com Reviewed-by: Pavel Shilovsky pshilov@microsoft.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/cifs/connect.c | 22 ++++++++++++++++++++++ fs/cifs/smb2misc.c | 7 ------- 2 files changed, 22 insertions(+), 7 deletions(-)
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 966e493c82e57..7e85070d010f4 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -930,6 +930,26 @@ cifs_handle_standard(struct TCP_Server_Info *server, struct mid_q_entry *mid) return 0; }
+static void +smb2_add_credits_from_hdr(char *buffer, struct TCP_Server_Info *server) +{ + struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buffer; + + /* + * SMB1 does not use credits. + */ + if (server->vals->header_preamble_size) + return; + + if (shdr->CreditRequest) { + spin_lock(&server->req_lock); + server->credits += le16_to_cpu(shdr->CreditRequest); + spin_unlock(&server->req_lock); + wake_up(&server->request_q); + } +} + + static int cifs_demultiplex_thread(void *p) { @@ -1059,6 +1079,7 @@ next_pdu: } else if (server->ops->is_oplock_break && server->ops->is_oplock_break(bufs[i], server)) { + smb2_add_credits_from_hdr(bufs[i], server); cifs_dbg(FYI, "Received oplock break\n"); } else { cifs_dbg(VFS, "No task to wake, unknown frame " @@ -1070,6 +1091,7 @@ next_pdu: if (server->ops->dump_detail) server->ops->dump_detail(bufs[i], server); + smb2_add_credits_from_hdr(bufs[i], server); cifs_dump_mids(server); #endif /* CIFS_DEBUG2 */ } diff --git a/fs/cifs/smb2misc.c b/fs/cifs/smb2misc.c index 0a7ed2e3ad4f2..e311f58dc1c82 100644 --- a/fs/cifs/smb2misc.c +++ b/fs/cifs/smb2misc.c @@ -659,13 +659,6 @@ smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server) if (rsp->sync_hdr.Command != SMB2_OPLOCK_BREAK) return false;
- if (rsp->sync_hdr.CreditRequest) { - spin_lock(&server->req_lock); - server->credits += le16_to_cpu(rsp->sync_hdr.CreditRequest); - spin_unlock(&server->req_lock); - wake_up(&server->request_q); - } - if (rsp->StructureSize != smb2_rsp_struct_sizes[SMB2_OPLOCK_BREAK_HE]) { if (le16_to_cpu(rsp->StructureSize) == 44)