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Diffstat (limited to 'fs/smb/client/smb2pdu.c')
-rw-r--r--fs/smb/client/smb2pdu.c197
1 files changed, 112 insertions, 85 deletions
diff --git a/fs/smb/client/smb2pdu.c b/fs/smb/client/smb2pdu.c
index a5efce03cb..bb84a89e59 100644
--- a/fs/smb/client/smb2pdu.c
+++ b/fs/smb/client/smb2pdu.c
@@ -23,6 +23,8 @@
#include <linux/uuid.h>
#include <linux/pagemap.h>
#include <linux/xattr.h>
+#include <linux/netfs.h>
+#include <trace/events/netfs.h>
#include "cifsglob.h"
#include "cifsacl.h"
#include "cifsproto.h"
@@ -4391,7 +4393,7 @@ static inline bool smb3_use_rdma_offload(struct cifs_io_parms *io_parms)
*/
static int
smb2_new_read_req(void **buf, unsigned int *total_len,
- struct cifs_io_parms *io_parms, struct cifs_readdata *rdata,
+ struct cifs_io_parms *io_parms, struct cifs_io_subrequest *rdata,
unsigned int remaining_bytes, int request_type)
{
int rc = -EACCES;
@@ -4419,10 +4421,12 @@ smb2_new_read_req(void **buf, unsigned int *total_len,
req->Length = cpu_to_le32(io_parms->length);
req->Offset = cpu_to_le64(io_parms->offset);
- trace_smb3_read_enter(0 /* xid */,
- io_parms->persistent_fid,
- io_parms->tcon->tid, io_parms->tcon->ses->Suid,
- io_parms->offset, io_parms->length);
+ trace_smb3_read_enter(rdata ? rdata->rreq->debug_id : 0,
+ rdata ? rdata->subreq.debug_index : 0,
+ rdata ? rdata->xid : 0,
+ io_parms->persistent_fid,
+ io_parms->tcon->tid, io_parms->tcon->ses->Suid,
+ io_parms->offset, io_parms->length);
#ifdef CONFIG_CIFS_SMB_DIRECT
/*
* If we want to do a RDMA write, fill in and append
@@ -4432,7 +4436,7 @@ smb2_new_read_req(void **buf, unsigned int *total_len,
struct smbd_buffer_descriptor_v1 *v1;
bool need_invalidate = server->dialect == SMB30_PROT_ID;
- rdata->mr = smbd_register_mr(server->smbd_conn, &rdata->iter,
+ rdata->mr = smbd_register_mr(server->smbd_conn, &rdata->subreq.io_iter,
true, need_invalidate);
if (!rdata->mr)
return -EAGAIN;
@@ -4480,11 +4484,21 @@ smb2_new_read_req(void **buf, unsigned int *total_len,
return rc;
}
+static void smb2_readv_worker(struct work_struct *work)
+{
+ struct cifs_io_subrequest *rdata =
+ container_of(work, struct cifs_io_subrequest, subreq.work);
+
+ netfs_subreq_terminated(&rdata->subreq,
+ (rdata->result == 0 || rdata->result == -EAGAIN) ?
+ rdata->got_bytes : rdata->result, true);
+}
+
static void
smb2_readv_callback(struct mid_q_entry *mid)
{
- struct cifs_readdata *rdata = mid->callback_data;
- struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
+ struct cifs_io_subrequest *rdata = mid->callback_data;
+ struct cifs_tcon *tcon = tlink_tcon(rdata->req->cfile->tlink);
struct TCP_Server_Info *server = rdata->server;
struct smb2_hdr *shdr =
(struct smb2_hdr *)rdata->iov[0].iov_base;
@@ -4492,17 +4506,17 @@ smb2_readv_callback(struct mid_q_entry *mid)
struct smb_rqst rqst = { .rq_iov = &rdata->iov[1], .rq_nvec = 1 };
if (rdata->got_bytes) {
- rqst.rq_iter = rdata->iter;
- rqst.rq_iter_size = iov_iter_count(&rdata->iter);
+ rqst.rq_iter = rdata->subreq.io_iter;
+ rqst.rq_iter_size = iov_iter_count(&rdata->subreq.io_iter);
}
WARN_ONCE(rdata->server != mid->server,
"rdata server %p != mid server %p",
rdata->server, mid->server);
- cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
+ cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%zu\n",
__func__, mid->mid, mid->mid_state, rdata->result,
- rdata->bytes);
+ rdata->subreq.len);
switch (mid->mid_state) {
case MID_RESPONSE_RECEIVED:
@@ -4512,7 +4526,6 @@ smb2_readv_callback(struct mid_q_entry *mid)
if (server->sign && !mid->decrypted) {
int rc;
- iov_iter_revert(&rqst.rq_iter, rdata->got_bytes);
iov_iter_truncate(&rqst.rq_iter, rdata->got_bytes);
rc = smb2_verify_signature(&rqst, server);
if (rc)
@@ -4553,24 +4566,37 @@ smb2_readv_callback(struct mid_q_entry *mid)
#endif
if (rdata->result && rdata->result != -ENODATA) {
cifs_stats_fail_inc(tcon, SMB2_READ_HE);
- trace_smb3_read_err(0 /* xid */,
- rdata->cfile->fid.persistent_fid,
- tcon->tid, tcon->ses->Suid, rdata->offset,
- rdata->bytes, rdata->result);
+ trace_smb3_read_err(rdata->rreq->debug_id,
+ rdata->subreq.debug_index,
+ rdata->xid,
+ rdata->req->cfile->fid.persistent_fid,
+ tcon->tid, tcon->ses->Suid, rdata->subreq.start,
+ rdata->subreq.len, rdata->result);
} else
- trace_smb3_read_done(0 /* xid */,
- rdata->cfile->fid.persistent_fid,
+ trace_smb3_read_done(rdata->rreq->debug_id,
+ rdata->subreq.debug_index,
+ rdata->xid,
+ rdata->req->cfile->fid.persistent_fid,
tcon->tid, tcon->ses->Suid,
- rdata->offset, rdata->got_bytes);
+ rdata->subreq.start, rdata->got_bytes);
- queue_work(cifsiod_wq, &rdata->work);
+ if (rdata->result == -ENODATA) {
+ /* We may have got an EOF error because fallocate
+ * failed to enlarge the file.
+ */
+ if (rdata->subreq.start < rdata->subreq.rreq->i_size)
+ rdata->result = 0;
+ }
+ rdata->credits.value = 0;
+ INIT_WORK(&rdata->subreq.work, smb2_readv_worker);
+ queue_work(cifsiod_wq, &rdata->subreq.work);
release_mid(mid);
add_credits(server, &credits, 0);
}
/* smb2_async_readv - send an async read, and set up mid to handle result */
int
-smb2_async_readv(struct cifs_readdata *rdata)
+smb2_async_readv(struct cifs_io_subrequest *rdata)
{
int rc, flags = 0;
char *buf;
@@ -4579,23 +4605,23 @@ smb2_async_readv(struct cifs_readdata *rdata)
struct smb_rqst rqst = { .rq_iov = rdata->iov,
.rq_nvec = 1 };
struct TCP_Server_Info *server;
- struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
+ struct cifs_tcon *tcon = tlink_tcon(rdata->req->cfile->tlink);
unsigned int total_len;
int credit_request;
- cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n",
- __func__, rdata->offset, rdata->bytes);
+ cifs_dbg(FYI, "%s: offset=%llu bytes=%zu\n",
+ __func__, rdata->subreq.start, rdata->subreq.len);
if (!rdata->server)
rdata->server = cifs_pick_channel(tcon->ses);
- io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
+ io_parms.tcon = tlink_tcon(rdata->req->cfile->tlink);
io_parms.server = server = rdata->server;
- io_parms.offset = rdata->offset;
- io_parms.length = rdata->bytes;
- io_parms.persistent_fid = rdata->cfile->fid.persistent_fid;
- io_parms.volatile_fid = rdata->cfile->fid.volatile_fid;
- io_parms.pid = rdata->pid;
+ io_parms.offset = rdata->subreq.start;
+ io_parms.length = rdata->subreq.len;
+ io_parms.persistent_fid = rdata->req->cfile->fid.persistent_fid;
+ io_parms.volatile_fid = rdata->req->cfile->fid.volatile_fid;
+ io_parms.pid = rdata->req->pid;
rc = smb2_new_read_req(
(void **) &buf, &total_len, &io_parms, rdata, 0, 0);
@@ -4611,7 +4637,7 @@ smb2_async_readv(struct cifs_readdata *rdata)
shdr = (struct smb2_hdr *)buf;
if (rdata->credits.value > 0) {
- shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
+ shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->subreq.len,
SMB2_MAX_BUFFER_SIZE));
credit_request = le16_to_cpu(shdr->CreditCharge) + 8;
if (server->credits >= server->max_credits)
@@ -4621,22 +4647,22 @@ smb2_async_readv(struct cifs_readdata *rdata)
min_t(int, server->max_credits -
server->credits, credit_request));
- rc = adjust_credits(server, &rdata->credits, rdata->bytes);
+ rc = adjust_credits(server, &rdata->credits, rdata->subreq.len);
if (rc)
goto async_readv_out;
flags |= CIFS_HAS_CREDITS;
}
- kref_get(&rdata->refcount);
rc = cifs_call_async(server, &rqst,
cifs_readv_receive, smb2_readv_callback,
smb3_handle_read_data, rdata, flags,
&rdata->credits);
if (rc) {
- kref_put(&rdata->refcount, cifs_readdata_release);
cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
- trace_smb3_read_err(0 /* xid */, io_parms.persistent_fid,
+ trace_smb3_read_err(rdata->rreq->debug_id,
+ rdata->subreq.debug_index,
+ rdata->xid, io_parms.persistent_fid,
io_parms.tcon->tid,
io_parms.tcon->ses->Suid,
io_parms.offset, io_parms.length, rc);
@@ -4687,22 +4713,23 @@ SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
if (rc != -ENODATA) {
cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
cifs_dbg(VFS, "Send error in read = %d\n", rc);
- trace_smb3_read_err(xid,
+ trace_smb3_read_err(0, 0, xid,
req->PersistentFileId,
io_parms->tcon->tid, ses->Suid,
io_parms->offset, io_parms->length,
rc);
} else
- trace_smb3_read_done(xid, req->PersistentFileId, io_parms->tcon->tid,
+ trace_smb3_read_done(0, 0, xid,
+ req->PersistentFileId, io_parms->tcon->tid,
ses->Suid, io_parms->offset, 0);
free_rsp_buf(resp_buftype, rsp_iov.iov_base);
cifs_small_buf_release(req);
return rc == -ENODATA ? 0 : rc;
} else
- trace_smb3_read_done(xid,
- req->PersistentFileId,
- io_parms->tcon->tid, ses->Suid,
- io_parms->offset, io_parms->length);
+ trace_smb3_read_done(0, 0, xid,
+ req->PersistentFileId,
+ io_parms->tcon->tid, ses->Suid,
+ io_parms->offset, io_parms->length);
cifs_small_buf_release(req);
@@ -4735,12 +4762,13 @@ SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
static void
smb2_writev_callback(struct mid_q_entry *mid)
{
- struct cifs_writedata *wdata = mid->callback_data;
- struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
+ struct cifs_io_subrequest *wdata = mid->callback_data;
+ struct cifs_tcon *tcon = tlink_tcon(wdata->req->cfile->tlink);
struct TCP_Server_Info *server = wdata->server;
- unsigned int written;
struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
struct cifs_credits credits = { .value = 0, .instance = 0 };
+ ssize_t result = 0;
+ size_t written;
WARN_ONCE(wdata->server != mid->server,
"wdata server %p != mid server %p",
@@ -4750,8 +4778,8 @@ smb2_writev_callback(struct mid_q_entry *mid)
case MID_RESPONSE_RECEIVED:
credits.value = le16_to_cpu(rsp->hdr.CreditRequest);
credits.instance = server->reconnect_instance;
- wdata->result = smb2_check_receive(mid, server, 0);
- if (wdata->result != 0)
+ result = smb2_check_receive(mid, server, 0);
+ if (result != 0)
break;
written = le32_to_cpu(rsp->DataLength);
@@ -4761,24 +4789,24 @@ smb2_writev_callback(struct mid_q_entry *mid)
* client. OS/2 servers are known to set incorrect
* CountHigh values.
*/
- if (written > wdata->bytes)
+ if (written > wdata->subreq.len)
written &= 0xFFFF;
- if (written < wdata->bytes)
+ if (written < wdata->subreq.len)
wdata->result = -ENOSPC;
else
- wdata->bytes = written;
+ wdata->subreq.len = written;
break;
case MID_REQUEST_SUBMITTED:
case MID_RETRY_NEEDED:
- wdata->result = -EAGAIN;
+ result = -EAGAIN;
break;
case MID_RESPONSE_MALFORMED:
credits.value = le16_to_cpu(rsp->hdr.CreditRequest);
credits.instance = server->reconnect_instance;
fallthrough;
default:
- wdata->result = -EIO;
+ result = -EIO;
break;
}
#ifdef CONFIG_CIFS_SMB_DIRECT
@@ -4794,46 +4822,43 @@ smb2_writev_callback(struct mid_q_entry *mid)
wdata->mr = NULL;
}
#endif
- if (wdata->result) {
+ if (result) {
cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
- trace_smb3_write_err(0 /* no xid */,
- wdata->cfile->fid.persistent_fid,
- tcon->tid, tcon->ses->Suid, wdata->offset,
- wdata->bytes, wdata->result);
+ trace_smb3_write_err(wdata->xid,
+ wdata->req->cfile->fid.persistent_fid,
+ tcon->tid, tcon->ses->Suid, wdata->subreq.start,
+ wdata->subreq.len, wdata->result);
if (wdata->result == -ENOSPC)
pr_warn_once("Out of space writing to %s\n",
tcon->tree_name);
} else
trace_smb3_write_done(0 /* no xid */,
- wdata->cfile->fid.persistent_fid,
+ wdata->req->cfile->fid.persistent_fid,
tcon->tid, tcon->ses->Suid,
- wdata->offset, wdata->bytes);
+ wdata->subreq.start, wdata->subreq.len);
- queue_work(cifsiod_wq, &wdata->work);
+ wdata->credits.value = 0;
+ cifs_write_subrequest_terminated(wdata, result ?: written, true);
release_mid(mid);
add_credits(server, &credits, 0);
}
/* smb2_async_writev - send an async write, and set up mid to handle result */
-int
-smb2_async_writev(struct cifs_writedata *wdata,
- void (*release)(struct kref *kref))
+void
+smb2_async_writev(struct cifs_io_subrequest *wdata)
{
int rc = -EACCES, flags = 0;
struct smb2_write_req *req = NULL;
struct smb2_hdr *shdr;
- struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
+ struct cifs_tcon *tcon = tlink_tcon(wdata->req->cfile->tlink);
struct TCP_Server_Info *server = wdata->server;
struct kvec iov[1];
struct smb_rqst rqst = { };
- unsigned int total_len;
+ unsigned int total_len, xid = wdata->xid;
struct cifs_io_parms _io_parms;
struct cifs_io_parms *io_parms = NULL;
int credit_request;
- if (!wdata->server || wdata->replay)
- server = wdata->server = cifs_pick_channel(tcon->ses);
-
/*
* in future we may get cifs_io_parms passed in from the caller,
* but for now we construct it here...
@@ -4841,18 +4866,18 @@ smb2_async_writev(struct cifs_writedata *wdata,
_io_parms = (struct cifs_io_parms) {
.tcon = tcon,
.server = server,
- .offset = wdata->offset,
- .length = wdata->bytes,
- .persistent_fid = wdata->cfile->fid.persistent_fid,
- .volatile_fid = wdata->cfile->fid.volatile_fid,
- .pid = wdata->pid,
+ .offset = wdata->subreq.start,
+ .length = wdata->subreq.len,
+ .persistent_fid = wdata->req->cfile->fid.persistent_fid,
+ .volatile_fid = wdata->req->cfile->fid.volatile_fid,
+ .pid = wdata->req->pid,
};
io_parms = &_io_parms;
rc = smb2_plain_req_init(SMB2_WRITE, tcon, server,
(void **) &req, &total_len);
if (rc)
- return rc;
+ goto out;
if (smb3_encryption_required(tcon))
flags |= CIFS_TRANSFORM_REQ;
@@ -4870,7 +4895,7 @@ smb2_async_writev(struct cifs_writedata *wdata,
offsetof(struct smb2_write_req, Buffer));
req->RemainingBytes = 0;
- trace_smb3_write_enter(0 /* xid */,
+ trace_smb3_write_enter(wdata->xid,
io_parms->persistent_fid,
io_parms->tcon->tid,
io_parms->tcon->ses->Suid,
@@ -4884,10 +4909,10 @@ smb2_async_writev(struct cifs_writedata *wdata,
*/
if (smb3_use_rdma_offload(io_parms)) {
struct smbd_buffer_descriptor_v1 *v1;
- size_t data_size = iov_iter_count(&wdata->iter);
+ size_t data_size = iov_iter_count(&wdata->subreq.io_iter);
bool need_invalidate = server->dialect == SMB30_PROT_ID;
- wdata->mr = smbd_register_mr(server->smbd_conn, &wdata->iter,
+ wdata->mr = smbd_register_mr(server->smbd_conn, &wdata->subreq.io_iter,
false, need_invalidate);
if (!wdata->mr) {
rc = -EAGAIN;
@@ -4914,9 +4939,9 @@ smb2_async_writev(struct cifs_writedata *wdata,
rqst.rq_iov = iov;
rqst.rq_nvec = 1;
- rqst.rq_iter = wdata->iter;
+ rqst.rq_iter = wdata->subreq.io_iter;
rqst.rq_iter_size = iov_iter_count(&rqst.rq_iter);
- if (wdata->replay)
+ if (test_bit(NETFS_SREQ_RETRYING, &wdata->subreq.flags))
smb2_set_replay(server, &rqst);
#ifdef CONFIG_CIFS_SMB_DIRECT
if (wdata->mr)
@@ -4934,7 +4959,7 @@ smb2_async_writev(struct cifs_writedata *wdata,
#endif
if (wdata->credits.value > 0) {
- shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
+ shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->subreq.len,
SMB2_MAX_BUFFER_SIZE));
credit_request = le16_to_cpu(shdr->CreditCharge) + 8;
if (server->credits >= server->max_credits)
@@ -4951,25 +4976,27 @@ smb2_async_writev(struct cifs_writedata *wdata,
flags |= CIFS_HAS_CREDITS;
}
- kref_get(&wdata->refcount);
rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
wdata, flags, &wdata->credits);
-
+ /* Can't touch wdata if rc == 0 */
if (rc) {
- trace_smb3_write_err(0 /* no xid */,
+ trace_smb3_write_err(xid,
io_parms->persistent_fid,
io_parms->tcon->tid,
io_parms->tcon->ses->Suid,
io_parms->offset,
io_parms->length,
rc);
- kref_put(&wdata->refcount, release);
cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
}
async_writev_out:
cifs_small_buf_release(req);
- return rc;
+out:
+ if (rc) {
+ add_credits_and_wake_if(wdata->server, &wdata->credits, 0);
+ cifs_write_subrequest_terminated(wdata, rc, true);
+ }
}
/*