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| author | Ronnie Sahlberg <lsahlber@redhat.com> | 2019-02-05 12:56:44 +1000 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2019-03-04 20:05:34 -0600 |
| commit | eca004523811f816bcfca3046ab54e1278e0973b (patch) | |
| tree | 98a06bf9c758a0a2e15ad49d9aaf9750efd14936 | |
| parent | 74ea5f983f9e86ebb4b7ed611937776dab18c67e (diff) | |
| download | linux-eca004523811f816bcfca3046ab54e1278e0973b.tar.gz linux-eca004523811f816bcfca3046ab54e1278e0973b.tar.bz2 linux-eca004523811f816bcfca3046ab54e1278e0973b.zip | |
cifs: add credits from unmatched responses/messages
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>
| -rw-r--r-- | fs/cifs/connect.c | 22 | ||||
| -rw-r--r-- | 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 7c9108ce3de0..a825ac219bbd 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -1063,6 +1063,26 @@ 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) { @@ -1192,6 +1212,7 @@ 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 " @@ -1203,6 +1224,7 @@ 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 7b8b58fb4d3f..6a9c47541c53 100644 --- a/fs/cifs/smb2misc.c +++ b/fs/cifs/smb2misc.c @@ -648,13 +648,6 @@ 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) |