2012/7/25 Jeff Layton <jlayton@xxxxxxxxxx>:
> For now, none of the callers populate rq_pages. That will be done for
> writes in a later patch. While we're at it, change the prototype of
> setup_async_request not to need a return pointer argument. Just
> return the pointer to the mid_q_entry or an ERR_PTR.
>
> Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
> ---
> fs/cifs/cifsglob.h | 4 ++--
> fs/cifs/cifsproto.h | 12 ++++++------
> fs/cifs/cifssmb.c | 20 +++++++++++++-------
> fs/cifs/smb2proto.h | 4 +---
> fs/cifs/smb2transport.c | 14 ++++++--------
> fs/cifs/transport.c | 30 ++++++++++++++----------------
> 6 files changed, 42 insertions(+), 42 deletions(-)
>
> diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
> index 2a7e4b8..a0bb713 100644
> --- a/fs/cifs/cifsglob.h
> +++ b/fs/cifs/cifsglob.h
> @@ -194,8 +194,8 @@ struct smb_version_operations {
> int (*setup_request)(struct cifs_ses *, struct kvec *, unsigned int,
> struct mid_q_entry **);
> /* setup async request: allocate mid, sign message */
> - int (*setup_async_request)(struct TCP_Server_Info *, struct kvec *,
> - unsigned int, struct mid_q_entry **);
> + struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
> + struct smb_rqst *);
> /* check response: verify signature, map error */
> int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
> bool);
> diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
> index 3620bec..8075f23 100644
> --- a/fs/cifs/cifsproto.h
> +++ b/fs/cifs/cifsproto.h
> @@ -69,10 +69,10 @@ extern struct mid_q_entry *AllocMidQEntry(const struct smb_hdr *smb_buffer,
> struct TCP_Server_Info *server);
> extern void DeleteMidQEntry(struct mid_q_entry *midEntry);
> extern void cifs_wake_up_task(struct mid_q_entry *mid);
> -extern int cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov,
> - unsigned int nvec, mid_receive_t *receive,
> - mid_callback_t *callback, void *cbdata,
> - const int flags);
> +extern int cifs_call_async(struct TCP_Server_Info *server,
> + struct smb_rqst *rqst,
> + mid_receive_t *receive, mid_callback_t *callback,
> + void *cbdata, const int flags);
> extern int SendReceive(const unsigned int /* xid */ , struct cifs_ses *,
> struct smb_hdr * /* input */ ,
> struct smb_hdr * /* out */ ,
> @@ -81,8 +81,8 @@ extern int SendReceiveNoRsp(const unsigned int xid, struct cifs_ses *ses,
> char *in_buf, int flags);
> extern int cifs_setup_request(struct cifs_ses *, struct kvec *, unsigned int,
> struct mid_q_entry **);
> -extern int cifs_setup_async_request(struct TCP_Server_Info *, struct kvec *,
> - unsigned int, struct mid_q_entry **);
> +extern struct mid_q_entry *cifs_setup_async_request(struct TCP_Server_Info *,
> + struct smb_rqst *);
> extern int cifs_check_receive(struct mid_q_entry *mid,
> struct TCP_Server_Info *server, bool log_error);
> extern int SendReceive2(const unsigned int /* xid */ , struct cifs_ses *,
> diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
> index ce5f75c..7365460 100644
> --- a/fs/cifs/cifssmb.c
> +++ b/fs/cifs/cifssmb.c
> @@ -751,6 +751,8 @@ CIFSSMBEcho(struct TCP_Server_Info *server)
> ECHO_REQ *smb;
> int rc = 0;
> struct kvec iov;
> + struct smb_rqst rqst = { .rq_iov = &iov,
> + .rq_nvec = 1 };
>
> cFYI(1, "In echo request");
>
> @@ -768,7 +770,7 @@ CIFSSMBEcho(struct TCP_Server_Info *server)
> iov.iov_base = smb;
> iov.iov_len = be32_to_cpu(smb->hdr.smb_buf_length) + 4;
>
> - rc = cifs_call_async(server, &iov, 1, NULL, cifs_echo_callback,
> + rc = cifs_call_async(server, &rqst, NULL, cifs_echo_callback,
> server, CIFS_ASYNC_OP | CIFS_ECHO_OP);
> if (rc)
> cFYI(1, "Echo request failed: %d", rc);
> @@ -1604,6 +1606,8 @@ cifs_async_readv(struct cifs_readdata *rdata)
> READ_REQ *smb = NULL;
> int wct;
> struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
> + struct smb_rqst rqst = { .rq_iov = rdata->iov,
> + .rq_nvec = 1 };
>
> cFYI(1, "%s: offset=%llu bytes=%u", __func__,
> rdata->offset, rdata->bytes);
> @@ -1647,9 +1651,8 @@ cifs_async_readv(struct cifs_readdata *rdata)
> rdata->iov[0].iov_len = be32_to_cpu(smb->hdr.smb_buf_length) + 4;
>
> kref_get(&rdata->refcount);
> - rc = cifs_call_async(tcon->ses->server, rdata->iov, 1,
> - cifs_readv_receive, cifs_readv_callback,
> - rdata, 0);
> + rc = cifs_call_async(tcon->ses->server, &rqst, cifs_readv_receive,
> + cifs_readv_callback, rdata, 0);
>
> if (rc == 0)
> cifs_stats_inc(&tcon->stats.cifs_stats.num_reads);
> @@ -2052,6 +2055,7 @@ cifs_async_writev(struct cifs_writedata *wdata)
> int wct;
> struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
> struct kvec *iov = NULL;
> + struct smb_rqst rqst = { };
>
> if (tcon->ses->capabilities & CAP_LARGE_FILES) {
> wct = 14;
> @@ -2068,11 +2072,13 @@ cifs_async_writev(struct cifs_writedata *wdata)
> goto async_writev_out;
>
> /* 1 iov per page + 1 for header */
> - iov = kzalloc((wdata->nr_pages + 1) * sizeof(*iov), GFP_NOFS);
> + rqst.rq_nvec = wdata->nr_pages + 1;
> + iov = kzalloc((rqst.rq_nvec) * sizeof(*iov), GFP_NOFS);
> if (iov == NULL) {
> rc = -ENOMEM;
> goto async_writev_out;
> }
> + rqst.rq_iov = iov;
>
> smb->hdr.Pid = cpu_to_le16((__u16)wdata->pid);
> smb->hdr.PidHigh = cpu_to_le16((__u16)(wdata->pid >> 16));
> @@ -2121,8 +2127,8 @@ cifs_async_writev(struct cifs_writedata *wdata)
> }
>
> kref_get(&wdata->refcount);
> - rc = cifs_call_async(tcon->ses->server, iov, wdata->nr_pages + 1,
> - NULL, cifs_writev_callback, wdata, 0);
> + rc = cifs_call_async(tcon->ses->server, &rqst, NULL,
> + cifs_writev_callback, wdata, 0);
>
> if (rc == 0)
> cifs_stats_inc(&tcon->stats.cifs_stats.num_writes);
> diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
> index 902bbe2..dbb798c 100644
> --- a/fs/cifs/smb2proto.h
> +++ b/fs/cifs/smb2proto.h
> @@ -43,9 +43,7 @@ extern int smb2_check_receive(struct mid_q_entry *mid,
> struct TCP_Server_Info *server, bool log_error);
> extern int smb2_setup_request(struct cifs_ses *ses, struct kvec *iov,
> unsigned int nvec, struct mid_q_entry **ret_mid);
> -extern int smb2_setup_async_request(struct TCP_Server_Info *server,
> - struct kvec *iov, unsigned int nvec,
> - struct mid_q_entry **ret_mid);
> +extern struct mid_q_entry *smb2_setup_async_request(struct TCP_Server_Info *server, struct smb_rqst *rqst);
> extern void smb2_echo_request(struct work_struct *work);
>
> extern int smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
> diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c
> index 31f5d42..c0a7a42 100644
> --- a/fs/cifs/smb2transport.c
> +++ b/fs/cifs/smb2transport.c
> @@ -148,25 +148,23 @@ smb2_setup_request(struct cifs_ses *ses, struct kvec *iov,
> return rc;
> }
>
> -int
> -smb2_setup_async_request(struct TCP_Server_Info *server, struct kvec *iov,
> - unsigned int nvec, struct mid_q_entry **ret_mid)
> +struct mid_q_entry *
> +smb2_setup_async_request(struct TCP_Server_Info *server,
> + struct smb_rqst *rqst)
> {
> - int rc = 0;
> - struct smb2_hdr *hdr = (struct smb2_hdr *)iov[0].iov_base;
> + struct smb2_hdr *hdr = (struct smb2_hdr *)smb_rqst->iov[0].iov_base;
> struct mid_q_entry *mid;
>
> smb2_seq_num_into_buf(server, hdr);
>
> mid = smb2_mid_entry_alloc(hdr, server);
> if (mid == NULL)
> - return -ENOMEM;
> + return ERR_PTR(-ENOMEM);
>
> /* rc = smb2_sign_smb2(iov, nvec, server);
> if (rc) {
> DeleteMidQEntry(mid);
> return rc;
> }*/
> - *ret_mid = mid;
> - return rc;
> + return mid;
> }
> diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
> index 5673ef1..73cfa6f 100644
> --- a/fs/cifs/transport.c
> +++ b/fs/cifs/transport.c
> @@ -454,12 +454,11 @@ wait_for_response(struct TCP_Server_Info *server, struct mid_q_entry *midQ)
> return 0;
> }
>
> -int
> -cifs_setup_async_request(struct TCP_Server_Info *server, struct kvec *iov,
> - unsigned int nvec, struct mid_q_entry **ret_mid)
> +struct mid_q_entry *
> +cifs_setup_async_request(struct TCP_Server_Info *server, struct smb_rqst *rqst)
> {
> int rc;
> - struct smb_hdr *hdr = (struct smb_hdr *)iov[0].iov_base;
> + struct smb_hdr *hdr = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
> struct mid_q_entry *mid;
>
> /* enable signing if server requires it */
> @@ -468,16 +467,15 @@ cifs_setup_async_request(struct TCP_Server_Info *server, struct kvec *iov,
>
> mid = AllocMidQEntry(hdr, server);
> if (mid == NULL)
> - return -ENOMEM;
> + return ERR_PTR(-ENOMEM);
>
> - rc = cifs_sign_smbv(iov, nvec, server, &mid->sequence_number);
> + rc = cifs_sign_rqst(rqst, server, &mid->sequence_number);
> if (rc) {
> DeleteMidQEntry(mid);
> - return rc;
> + return ERR_PTR(rc);
> }
>
> - *ret_mid = mid;
> - return 0;
> + return mid;
> }
>
> /*
> @@ -485,9 +483,9 @@ cifs_setup_async_request(struct TCP_Server_Info *server, struct kvec *iov,
> * the result. Caller is responsible for dealing with timeouts.
> */
> int
> -cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov,
> - unsigned int nvec, mid_receive_t *receive,
> - mid_callback_t *callback, void *cbdata, const int flags)
> +cifs_call_async(struct TCP_Server_Info *server, struct smb_rqst *rqst,
> + mid_receive_t *receive, mid_callback_t *callback,
> + void *cbdata, const int flags)
> {
> int rc, timeout, optype;
> struct mid_q_entry *mid;
> @@ -500,12 +498,12 @@ cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov,
> return rc;
>
> mutex_lock(&server->srv_mutex);
> - rc = server->ops->setup_async_request(server, iov, nvec, &mid);
> - if (rc) {
> + mid = server->ops->setup_async_request(server, rqst);
> + if (IS_ERR(mid)) {
> mutex_unlock(&server->srv_mutex);
> add_credits(server, 1, optype);
> wake_up(&server->request_q);
> - return rc;
> + return PTR_ERR(mid);
> }
>
> mid->receive = receive;
> @@ -520,7 +518,7 @@ cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov,
>
>
> cifs_in_send_inc(server);
> - rc = smb_sendv(server, iov, nvec);
> + rc = smb_send_rqst(server, rqst);
> cifs_in_send_dec(server);
> cifs_save_when_sent(mid);
> mutex_unlock(&server->srv_mutex);
> --
> 1.7.11.2
>
> --
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Like the idea of changing setup_async_request prototype.
Reviewed-by: Pavel Shilovsky <pshilovsky@xxxxxxxxx>
--
Best regards,
Pavel Shilovsky.
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