#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/vfs.h>
+#include <linux/task_io_accounting_ops.h>
#include <linux/uaccess.h>
+#include <linux/pagemap.h>
#include <linux/xattr.h>
#include "smb2pdu.h"
#include "cifsglob.h"
#include "cifs_debug.h"
#include "ntlmssp.h"
#include "smb2status.h"
+#include "smb2glob.h"
/*
* The following table defines the expected "StructureSize" of SMB2 requests
int
SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path,
u64 *persistent_fid, u64 *volatile_fid, __u32 desired_access,
- __u32 create_disposition, __u32 file_attributes, __u32 create_options)
+ __u32 create_disposition, __u32 file_attributes, __u32 create_options,
+ struct smb2_file_all_info *buf)
{
struct smb2_create_req *req;
struct smb2_create_rsp *rsp;
if (rc)
return rc;
- if (enable_oplocks)
+ /* if (server->oplocks)
req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_BATCH;
- else
+ else */
req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE;
req->ImpersonationLevel = IL_IMPERSONATION;
req->DesiredAccess = cpu_to_le32(desired_access);
}
*persistent_fid = rsp->PersistentFileId;
*volatile_fid = rsp->VolatileFileId;
+
+ if (buf) {
+ memcpy(buf, &rsp->CreationTime, 32);
+ buf->AllocationSize = rsp->AllocationSize;
+ buf->EndOfFile = rsp->EndofFile;
+ buf->Attributes = rsp->FileAttributes;
+ buf->NumberOfLinks = cpu_to_le32(1);
+ buf->DeletePending = 0;
+ }
creat_exit:
free_rsp_buf(resp_buftype, rsp);
return rc;
return 0;
}
-int
-SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
- u64 persistent_fid, u64 volatile_fid,
- struct smb2_file_all_info *data)
+static int
+query_info(const unsigned int xid, struct cifs_tcon *tcon,
+ u64 persistent_fid, u64 volatile_fid, u8 info_class,
+ size_t output_len, size_t min_len, void *data)
{
struct smb2_query_info_req *req;
struct smb2_query_info_rsp *rsp = NULL;
return rc;
req->InfoType = SMB2_O_INFO_FILE;
- req->FileInfoClass = FILE_ALL_INFORMATION;
+ req->FileInfoClass = info_class;
req->PersistentFileId = persistent_fid;
req->VolatileFileId = volatile_fid;
/* 4 for rfc1002 length field and 1 for Buffer */
req->InputBufferOffset =
cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4);
- req->OutputBufferLength =
- cpu_to_le32(sizeof(struct smb2_file_all_info) + MAX_NAME * 2);
+ req->OutputBufferLength = cpu_to_le32(output_len);
iov[0].iov_base = (char *)req;
/* 4 for rfc1002 length field */
rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset),
le32_to_cpu(rsp->OutputBufferLength),
- &rsp->hdr, sizeof(struct smb2_file_all_info),
- (char *)data);
+ &rsp->hdr, min_len, data);
qinf_exit:
free_rsp_buf(resp_buftype, rsp);
return rc;
}
+int
+SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
+ u64 persistent_fid, u64 volatile_fid,
+ struct smb2_file_all_info *data)
+{
+ return query_info(xid, tcon, persistent_fid, volatile_fid,
+ FILE_ALL_INFORMATION,
+ sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
+ sizeof(struct smb2_file_all_info), data);
+}
+
+int
+SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon,
+ u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid)
+{
+ return query_info(xid, tcon, persistent_fid, volatile_fid,
+ FILE_INTERNAL_INFORMATION,
+ sizeof(struct smb2_file_internal_info),
+ sizeof(struct smb2_file_internal_info), uniqueid);
+}
+
/*
* This is a no-op for now. We're not really interested in the reply, but
* rather in the fact that the server sent one and that server->lstrp
cifs_small_buf_release(req);
return rc;
}
+
+int
+SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
+ u64 volatile_fid)
+{
+ struct smb2_flush_req *req;
+ struct TCP_Server_Info *server;
+ struct cifs_ses *ses = tcon->ses;
+ struct kvec iov[1];
+ int resp_buftype;
+ int rc = 0;
+
+ cFYI(1, "Flush");
+
+ if (ses && (ses->server))
+ server = ses->server;
+ else
+ return -EIO;
+
+ rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
+ if (rc)
+ return rc;
+
+ req->PersistentFileId = persistent_fid;
+ req->VolatileFileId = volatile_fid;
+
+ iov[0].iov_base = (char *)req;
+ /* 4 for rfc1002 length field */
+ iov[0].iov_len = get_rfc1002_length(req) + 4;
+
+ rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0);
+
+ if ((rc != 0) && tcon)
+ cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
+
+ free_rsp_buf(resp_buftype, iov[0].iov_base);
+ return rc;
+}
+
+/*
+ * To form a chain of read requests, any read requests after the first should
+ * have the end_of_chain boolean set to true.
+ */
+static int
+smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms,
+ unsigned int remaining_bytes, int request_type)
+{
+ int rc = -EACCES;
+ struct smb2_read_req *req = NULL;
+
+ rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req);
+ if (rc)
+ return rc;
+ if (io_parms->tcon->ses->server == NULL)
+ return -ECONNABORTED;
+
+ req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
+
+ req->PersistentFileId = io_parms->persistent_fid;
+ req->VolatileFileId = io_parms->volatile_fid;
+ req->ReadChannelInfoOffset = 0; /* reserved */
+ req->ReadChannelInfoLength = 0; /* reserved */
+ req->Channel = 0; /* reserved */
+ req->MinimumCount = 0;
+ req->Length = cpu_to_le32(io_parms->length);
+ req->Offset = cpu_to_le64(io_parms->offset);
+
+ if (request_type & CHAINED_REQUEST) {
+ if (!(request_type & END_OF_CHAIN)) {
+ /* 4 for rfc1002 length field */
+ req->hdr.NextCommand =
+ cpu_to_le32(get_rfc1002_length(req) + 4);
+ } else /* END_OF_CHAIN */
+ req->hdr.NextCommand = 0;
+ if (request_type & RELATED_REQUEST) {
+ req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
+ /*
+ * Related requests use info from previous read request
+ * in chain.
+ */
+ req->hdr.SessionId = 0xFFFFFFFF;
+ req->hdr.TreeId = 0xFFFFFFFF;
+ req->PersistentFileId = 0xFFFFFFFF;
+ req->VolatileFileId = 0xFFFFFFFF;
+ }
+ }
+ if (remaining_bytes > io_parms->length)
+ req->RemainingBytes = cpu_to_le32(remaining_bytes);
+ else
+ req->RemainingBytes = 0;
+
+ iov[0].iov_base = (char *)req;
+ /* 4 for rfc1002 length field */
+ iov[0].iov_len = get_rfc1002_length(req) + 4;
+ return rc;
+}
+
+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 TCP_Server_Info *server = tcon->ses->server;
+ struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov[0].iov_base;
+ unsigned int credits_received = 1;
+
+ cFYI(1, "%s: mid=%llu state=%d result=%d bytes=%u", __func__,
+ mid->mid, mid->mid_state, rdata->result, rdata->bytes);
+
+ switch (mid->mid_state) {
+ case MID_RESPONSE_RECEIVED:
+ credits_received = le16_to_cpu(buf->CreditRequest);
+ /* result already set, check signature */
+ /* if (server->sec_mode &
+ (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
+ if (smb2_verify_signature(mid->resp_buf, server))
+ cERROR(1, "Unexpected SMB signature"); */
+ /* FIXME: should this be counted toward the initiating task? */
+ task_io_account_read(rdata->bytes);
+ cifs_stats_bytes_read(tcon, rdata->bytes);
+ break;
+ case MID_REQUEST_SUBMITTED:
+ case MID_RETRY_NEEDED:
+ rdata->result = -EAGAIN;
+ break;
+ default:
+ if (rdata->result != -ENODATA)
+ rdata->result = -EIO;
+ }
+
+ if (rdata->result)
+ cifs_stats_fail_inc(tcon, SMB2_READ_HE);
+
+ queue_work(cifsiod_wq, &rdata->work);
+ DeleteMidQEntry(mid);
+ add_credits(server, credits_received, 0);
+}
+
+/* smb2_async_readv - send an async write, and set up mid to handle result */
+int
+smb2_async_readv(struct cifs_readdata *rdata)
+{
+ int rc;
+ struct smb2_hdr *buf;
+ struct cifs_io_parms io_parms;
+
+ cFYI(1, "%s: offset=%llu bytes=%u", __func__,
+ rdata->offset, rdata->bytes);
+
+ io_parms.tcon = tlink_tcon(rdata->cfile->tlink);
+ 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;
+ rc = smb2_new_read_req(&rdata->iov[0], &io_parms, 0, 0);
+ if (rc)
+ return rc;
+
+ buf = (struct smb2_hdr *)rdata->iov[0].iov_base;
+ /* 4 for rfc1002 length field */
+ rdata->iov[0].iov_len = get_rfc1002_length(rdata->iov[0].iov_base) + 4;
+
+ kref_get(&rdata->refcount);
+ rc = cifs_call_async(io_parms.tcon->ses->server, rdata->iov, 1,
+ cifs_readv_receive, smb2_readv_callback,
+ rdata, 0);
+ if (rc)
+ kref_put(&rdata->refcount, cifs_readdata_release);
+
+ cifs_small_buf_release(buf);
+ return rc;
+}
+
+int
+SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
+ unsigned int *nbytes, char **buf, int *buf_type)
+{
+ int resp_buftype, rc = -EACCES;
+ struct smb2_read_rsp *rsp = NULL;
+ struct kvec iov[1];
+
+ *nbytes = 0;
+ rc = smb2_new_read_req(iov, io_parms, 0, 0);
+ if (rc)
+ return rc;
+
+ rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1,
+ &resp_buftype, CIFS_LOG_ERROR);
+
+ rsp = (struct smb2_read_rsp *)iov[0].iov_base;
+
+ if (rsp->hdr.Status == STATUS_END_OF_FILE) {
+ free_rsp_buf(resp_buftype, iov[0].iov_base);
+ return 0;
+ }
+
+ if (rc) {
+ cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
+ cERROR(1, "Send error in read = %d", rc);
+ } else {
+ *nbytes = le32_to_cpu(rsp->DataLength);
+ if ((*nbytes > CIFS_MAX_MSGSIZE) ||
+ (*nbytes > io_parms->length)) {
+ cFYI(1, "bad length %d for count %d", *nbytes,
+ io_parms->length);
+ rc = -EIO;
+ *nbytes = 0;
+ }
+ }
+
+ if (*buf) {
+ memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset,
+ *nbytes);
+ free_rsp_buf(resp_buftype, iov[0].iov_base);
+ } else if (resp_buftype != CIFS_NO_BUFFER) {
+ *buf = iov[0].iov_base;
+ if (resp_buftype == CIFS_SMALL_BUFFER)
+ *buf_type = CIFS_SMALL_BUFFER;
+ else if (resp_buftype == CIFS_LARGE_BUFFER)
+ *buf_type = CIFS_LARGE_BUFFER;
+ }
+ return rc;
+}
+
+/*
+ * Check the mid_state and signature on received buffer (if any), and queue the
+ * workqueue completion task.
+ */
+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);
+ unsigned int written;
+ struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
+ unsigned int credits_received = 1;
+
+ switch (mid->mid_state) {
+ case MID_RESPONSE_RECEIVED:
+ credits_received = le16_to_cpu(rsp->hdr.CreditRequest);
+ wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
+ if (wdata->result != 0)
+ break;
+
+ written = le32_to_cpu(rsp->DataLength);
+ /*
+ * Mask off high 16 bits when bytes written as returned
+ * by the server is greater than bytes requested by the
+ * client. OS/2 servers are known to set incorrect
+ * CountHigh values.
+ */
+ if (written > wdata->bytes)
+ written &= 0xFFFF;
+
+ if (written < wdata->bytes)
+ wdata->result = -ENOSPC;
+ else
+ wdata->bytes = written;
+ break;
+ case MID_REQUEST_SUBMITTED:
+ case MID_RETRY_NEEDED:
+ wdata->result = -EAGAIN;
+ break;
+ default:
+ wdata->result = -EIO;
+ break;
+ }
+
+ if (wdata->result)
+ cifs_stats_fail_inc(tcon, SMB2_WRITE_HE);
+
+ queue_work(cifsiod_wq, &wdata->work);
+ DeleteMidQEntry(mid);
+ add_credits(tcon->ses->server, credits_received, 0);
+}
+
+/* smb2_async_writev - send an async write, and set up mid to handle result */
+int
+smb2_async_writev(struct cifs_writedata *wdata)
+{
+ int i, rc = -EACCES;
+ struct smb2_write_req *req = NULL;
+ struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
+ struct kvec *iov = NULL;
+
+ rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
+ if (rc)
+ goto async_writev_out;
+
+ /* 1 iov per page + 1 for header */
+ iov = kzalloc((wdata->nr_pages + 1) * sizeof(*iov), GFP_NOFS);
+ if (iov == NULL) {
+ rc = -ENOMEM;
+ goto async_writev_out;
+ }
+
+ req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid);
+
+ req->PersistentFileId = wdata->cfile->fid.persistent_fid;
+ req->VolatileFileId = wdata->cfile->fid.volatile_fid;
+ req->WriteChannelInfoOffset = 0;
+ req->WriteChannelInfoLength = 0;
+ req->Channel = 0;
+ req->Offset = cpu_to_le64(wdata->offset);
+ /* 4 for rfc1002 length field */
+ req->DataOffset = cpu_to_le16(
+ offsetof(struct smb2_write_req, Buffer) - 4);
+ req->RemainingBytes = 0;
+
+ /* 4 for rfc1002 length field and 1 for Buffer */
+ iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
+ iov[0].iov_base = (char *)req;
+
+ /*
+ * This function should marshal up the page array into the kvec
+ * array, reserving [0] for the header. It should kmap the pages
+ * and set the iov_len properly for each one. It may also set
+ * wdata->bytes too.
+ */
+ cifs_kmap_lock();
+ wdata->marshal_iov(iov, wdata);
+ cifs_kmap_unlock();
+
+ cFYI(1, "async write at %llu %u bytes", wdata->offset, wdata->bytes);
+
+ req->Length = cpu_to_le32(wdata->bytes);
+
+ inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */);
+
+ kref_get(&wdata->refcount);
+ rc = cifs_call_async(tcon->ses->server, iov, wdata->nr_pages + 1,
+ NULL, smb2_writev_callback, wdata, 0);
+
+ if (rc)
+ kref_put(&wdata->refcount, cifs_writedata_release);
+
+ /* send is done, unmap pages */
+ for (i = 0; i < wdata->nr_pages; i++)
+ kunmap(wdata->pages[i]);
+
+async_writev_out:
+ cifs_small_buf_release(req);
+ kfree(iov);
+ return rc;
+}
+
+/*
+ * SMB2_write function gets iov pointer to kvec array with n_vec as a length.
+ * The length field from io_parms must be at least 1 and indicates a number of
+ * elements with data to write that begins with position 1 in iov array. All
+ * data length is specified by count.
+ */
+int
+SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
+ unsigned int *nbytes, struct kvec *iov, int n_vec)
+{
+ int rc = 0;
+ struct smb2_write_req *req = NULL;
+ struct smb2_write_rsp *rsp = NULL;
+ int resp_buftype;
+ *nbytes = 0;
+
+ if (n_vec < 1)
+ return rc;
+
+ rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req);
+ if (rc)
+ return rc;
+
+ if (io_parms->tcon->ses->server == NULL)
+ return -ECONNABORTED;
+
+ req->hdr.ProcessId = cpu_to_le32(io_parms->pid);
+
+ req->PersistentFileId = io_parms->persistent_fid;
+ req->VolatileFileId = io_parms->volatile_fid;
+ req->WriteChannelInfoOffset = 0;
+ req->WriteChannelInfoLength = 0;
+ req->Channel = 0;
+ req->Length = cpu_to_le32(io_parms->length);
+ req->Offset = cpu_to_le64(io_parms->offset);
+ /* 4 for rfc1002 length field */
+ req->DataOffset = cpu_to_le16(
+ offsetof(struct smb2_write_req, Buffer) - 4);
+ req->RemainingBytes = 0;
+
+ iov[0].iov_base = (char *)req;
+ /* 4 for rfc1002 length field and 1 for Buffer */
+ iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
+
+ /* length of entire message including data to be written */
+ inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */);
+
+ rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1,
+ &resp_buftype, 0);
+
+ if (rc) {
+ cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE);
+ cERROR(1, "Send error in write = %d", rc);
+ } else {
+ rsp = (struct smb2_write_rsp *)iov[0].iov_base;
+ *nbytes = le32_to_cpu(rsp->DataLength);
+ free_rsp_buf(resp_buftype, rsp);
+ }
+ return rc;
+}
projects / deliverable / linux.git / blobdiff