diff options
Diffstat (limited to 'fs/cifs/smb2pdu.c')
| -rw-r--r-- | fs/cifs/smb2pdu.c | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index be7b2eb55134..c31e5a060338 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -1747,11 +1747,12 @@ smb2_readv_callback(struct mid_q_entry *mid) int smb2_async_readv(struct cifs_readdata *rdata) { - int rc; + int rc, flags = 0; struct smb2_hdr *buf; struct cifs_io_parms io_parms; struct smb_rqst rqst = { .rq_iov = &rdata->iov, .rq_nvec = 1 }; + struct TCP_Server_Info *server; cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n", __func__, rdata->offset, rdata->bytes); @@ -1762,18 +1763,41 @@ smb2_async_readv(struct cifs_readdata *rdata) io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; io_parms.pid = rdata->pid; + + server = io_parms.tcon->ses->server; + rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0); - if (rc) + if (rc) { + if (rc == -EAGAIN && rdata->credits) { + /* credits was reset by reconnect */ + rdata->credits = 0; + /* reduce in_flight value since we won't send the req */ + spin_lock(&server->req_lock); + server->in_flight--; + spin_unlock(&server->req_lock); + } return rc; + } buf = (struct smb2_hdr *)rdata->iov.iov_base; /* 4 for rfc1002 length field */ rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4; + if (rdata->credits) { + buf->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes, + SMB2_MAX_BUFFER_SIZE)); + spin_lock(&server->req_lock); + server->credits += rdata->credits - + le16_to_cpu(buf->CreditCharge); + spin_unlock(&server->req_lock); + wake_up(&server->request_q); + flags = CIFS_HAS_CREDITS; + } + kref_get(&rdata->refcount); rc = cifs_call_async(io_parms.tcon->ses->server, &rqst, cifs_readv_receive, smb2_readv_callback, - rdata, 0); + rdata, flags); if (rc) { kref_put(&rdata->refcount, cifs_readdata_release); cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE); |