diff options
Diffstat (limited to 'fs/cifs/cifssmb.c')
-rw-r--r-- | fs/cifs/cifssmb.c | 168 |
1 files changed, 94 insertions, 74 deletions
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 8b7794c31591..f52c5ab78f9d 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -458,7 +458,10 @@ CIFSSMBNegotiate(unsigned int xid, struct cifs_ses *ses) goto neg_err_exit; } server->sec_mode = (__u8)le16_to_cpu(rsp->SecurityMode); - server->maxReq = le16_to_cpu(rsp->MaxMpxCount); + server->maxReq = min_t(unsigned int, + le16_to_cpu(rsp->MaxMpxCount), + cifs_max_pending); + cifs_set_credits(server, server->maxReq); server->maxBuf = le16_to_cpu(rsp->MaxBufSize); server->max_vcs = le16_to_cpu(rsp->MaxNumberVcs); /* even though we do not use raw we might as well set this @@ -564,7 +567,9 @@ CIFSSMBNegotiate(unsigned int xid, struct cifs_ses *ses) /* one byte, so no need to convert this or EncryptionKeyLen from little endian */ - server->maxReq = le16_to_cpu(pSMBr->MaxMpxCount); + server->maxReq = min_t(unsigned int, le16_to_cpu(pSMBr->MaxMpxCount), + cifs_max_pending); + cifs_set_credits(server, server->maxReq); /* probably no need to store and check maxvcs */ server->maxBuf = le32_to_cpu(pSMBr->MaxBufferSize); server->max_rw = le32_to_cpu(pSMBr->MaxRawSize); @@ -691,7 +696,7 @@ CIFSSMBTDis(const int xid, struct cifs_tcon *tcon) if (rc) return rc; - rc = SendReceiveNoRsp(xid, tcon->ses, smb_buffer, 0); + rc = SendReceiveNoRsp(xid, tcon->ses, (char *)smb_buffer, 0); if (rc) cFYI(1, "Tree disconnect failed %d", rc); @@ -716,8 +721,7 @@ cifs_echo_callback(struct mid_q_entry *mid) struct TCP_Server_Info *server = mid->callback_data; DeleteMidQEntry(mid); - atomic_dec(&server->inFlight); - wake_up(&server->request_q); + cifs_add_credits(server, 1); } int @@ -788,7 +792,7 @@ CIFSSMBLogoff(const int xid, struct cifs_ses *ses) pSMB->hdr.Uid = ses->Suid; pSMB->AndXCommand = 0xFF; - rc = SendReceiveNoRsp(xid, ses, (struct smb_hdr *) pSMB, 0); + rc = SendReceiveNoRsp(xid, ses, (char *) pSMB, 0); session_already_dead: mutex_unlock(&ses->session_mutex); @@ -1410,8 +1414,7 @@ cifs_readdata_free(struct cifs_readdata *rdata) static int cifs_readv_discard(struct TCP_Server_Info *server, struct mid_q_entry *mid) { - READ_RSP *rsp = (READ_RSP *)server->smallbuf; - unsigned int rfclen = be32_to_cpu(rsp->hdr.smb_buf_length); + unsigned int rfclen = get_rfc1002_length(server->smallbuf); int remaining = rfclen + 4 - server->total_read; struct cifs_readdata *rdata = mid->callback_data; @@ -1420,7 +1423,7 @@ cifs_readv_discard(struct TCP_Server_Info *server, struct mid_q_entry *mid) length = cifs_read_from_socket(server, server->bigbuf, min_t(unsigned int, remaining, - CIFSMaxBufSize + MAX_CIFS_HDR_SIZE)); + CIFSMaxBufSize + max_header_size())); if (length < 0) return length; server->total_read += length; @@ -1431,19 +1434,40 @@ cifs_readv_discard(struct TCP_Server_Info *server, struct mid_q_entry *mid) return 0; } +static inline size_t +read_rsp_size(void) +{ + return sizeof(READ_RSP); +} + +static inline unsigned int +read_data_offset(char *buf) +{ + READ_RSP *rsp = (READ_RSP *)buf; + return le16_to_cpu(rsp->DataOffset); +} + +static inline unsigned int +read_data_length(char *buf) +{ + READ_RSP *rsp = (READ_RSP *)buf; + return (le16_to_cpu(rsp->DataLengthHigh) << 16) + + le16_to_cpu(rsp->DataLength); +} + static int cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid) { int length, len; unsigned int data_offset, remaining, data_len; struct cifs_readdata *rdata = mid->callback_data; - READ_RSP *rsp = (READ_RSP *)server->smallbuf; - unsigned int rfclen = be32_to_cpu(rsp->hdr.smb_buf_length) + 4; + char *buf = server->smallbuf; + unsigned int buflen = get_rfc1002_length(buf) + 4; u64 eof; pgoff_t eof_index; struct page *page, *tpage; - cFYI(1, "%s: mid=%u offset=%llu bytes=%u", __func__, + cFYI(1, "%s: mid=%llu offset=%llu bytes=%u", __func__, mid->mid, rdata->offset, rdata->bytes); /* @@ -1451,10 +1475,9 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid) * can if there's not enough data. At this point, we've read down to * the Mid. */ - len = min_t(unsigned int, rfclen, sizeof(*rsp)) - - sizeof(struct smb_hdr) + 1; + len = min_t(unsigned int, buflen, read_rsp_size()) - header_size() + 1; - rdata->iov[0].iov_base = server->smallbuf + sizeof(struct smb_hdr) - 1; + rdata->iov[0].iov_base = buf + header_size() - 1; rdata->iov[0].iov_len = len; length = cifs_readv_from_socket(server, rdata->iov, 1, len); @@ -1463,7 +1486,7 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid) server->total_read += length; /* Was the SMB read successful? */ - rdata->result = map_smb_to_linux_error(&rsp->hdr, false); + rdata->result = map_smb_to_linux_error(buf, false); if (rdata->result != 0) { cFYI(1, "%s: server returned error %d", __func__, rdata->result); @@ -1471,14 +1494,14 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid) } /* Is there enough to get to the rest of the READ_RSP header? */ - if (server->total_read < sizeof(READ_RSP)) { + if (server->total_read < read_rsp_size()) { cFYI(1, "%s: server returned short header. got=%u expected=%zu", - __func__, server->total_read, sizeof(READ_RSP)); + __func__, server->total_read, read_rsp_size()); rdata->result = -EIO; return cifs_readv_discard(server, mid); } - data_offset = le16_to_cpu(rsp->DataOffset) + 4; + data_offset = read_data_offset(buf) + 4; if (data_offset < server->total_read) { /* * win2k8 sometimes sends an offset of 0 when the read @@ -1502,7 +1525,7 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid) len = data_offset - server->total_read; if (len > 0) { /* read any junk before data into the rest of smallbuf */ - rdata->iov[0].iov_base = server->smallbuf + server->total_read; + rdata->iov[0].iov_base = buf + server->total_read; rdata->iov[0].iov_len = len; length = cifs_readv_from_socket(server, rdata->iov, 1, len); if (length < 0) @@ -1511,15 +1534,14 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid) } /* set up first iov for signature check */ - rdata->iov[0].iov_base = server->smallbuf; + rdata->iov[0].iov_base = buf; rdata->iov[0].iov_len = server->total_read; cFYI(1, "0: iov_base=%p iov_len=%zu", rdata->iov[0].iov_base, rdata->iov[0].iov_len); /* how much data is in the response? */ - data_len = le16_to_cpu(rsp->DataLengthHigh) << 16; - data_len += le16_to_cpu(rsp->DataLength); - if (data_offset + data_len > rfclen) { + data_len = read_data_length(buf); + if (data_offset + data_len > buflen) { /* data_len is corrupt -- discard frame */ rdata->result = -EIO; return cifs_readv_discard(server, mid); @@ -1598,11 +1620,11 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid) rdata->bytes = length; - cFYI(1, "total_read=%u rfclen=%u remaining=%u", server->total_read, - rfclen, remaining); + cFYI(1, "total_read=%u buflen=%u remaining=%u", server->total_read, + buflen, remaining); /* discard anything left over */ - if (server->total_read < rfclen) + if (server->total_read < buflen) return cifs_readv_discard(server, mid); dequeue_mid(mid, false); @@ -1643,10 +1665,10 @@ cifs_readv_callback(struct mid_q_entry *mid) struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); struct TCP_Server_Info *server = tcon->ses->server; - cFYI(1, "%s: mid=%u state=%d result=%d bytes=%u", __func__, - mid->mid, mid->midState, rdata->result, rdata->bytes); + cFYI(1, "%s: mid=%llu state=%d result=%d bytes=%u", __func__, + mid->mid, mid->mid_state, rdata->result, rdata->bytes); - switch (mid->midState) { + switch (mid->mid_state) { case MID_RESPONSE_RECEIVED: /* result already set, check signature */ if (server->sec_mode & @@ -1667,10 +1689,9 @@ cifs_readv_callback(struct mid_q_entry *mid) rdata->result = -EIO; } - queue_work(system_nrt_wq, &rdata->work); + queue_work(cifsiod_wq, &rdata->work); DeleteMidQEntry(mid); - atomic_dec(&server->inFlight); - wake_up(&server->request_q); + cifs_add_credits(server, 1); } /* cifs_async_readv - send an async write, and set up mid to handle result */ @@ -2014,7 +2035,7 @@ cifs_writev_requeue(struct cifs_writedata *wdata) kref_put(&wdata->refcount, cifs_writedata_release); } -static void +void cifs_writev_complete(struct work_struct *work) { struct cifs_writedata *wdata = container_of(work, @@ -2023,7 +2044,9 @@ cifs_writev_complete(struct work_struct *work) int i = 0; if (wdata->result == 0) { + spin_lock(&inode->i_lock); cifs_update_eof(CIFS_I(inode), wdata->offset, wdata->bytes); + spin_unlock(&inode->i_lock); cifs_stats_bytes_written(tlink_tcon(wdata->cfile->tlink), wdata->bytes); } else if (wdata->sync_mode == WB_SYNC_ALL && wdata->result == -EAGAIN) @@ -2044,7 +2067,7 @@ cifs_writev_complete(struct work_struct *work) } struct cifs_writedata * -cifs_writedata_alloc(unsigned int nr_pages) +cifs_writedata_alloc(unsigned int nr_pages, work_func_t complete) { struct cifs_writedata *wdata; @@ -2058,14 +2081,16 @@ cifs_writedata_alloc(unsigned int nr_pages) wdata = kzalloc(sizeof(*wdata) + sizeof(struct page *) * (nr_pages - 1), GFP_NOFS); if (wdata != NULL) { - INIT_WORK(&wdata->work, cifs_writev_complete); kref_init(&wdata->refcount); + INIT_LIST_HEAD(&wdata->list); + init_completion(&wdata->done); + INIT_WORK(&wdata->work, complete); } return wdata; } /* - * Check the midState and signature on received buffer (if any), and queue the + * Check the mid_state and signature on received buffer (if any), and queue the * workqueue completion task. */ static void @@ -2076,7 +2101,7 @@ cifs_writev_callback(struct mid_q_entry *mid) unsigned int written; WRITE_RSP *smb = (WRITE_RSP *)mid->resp_buf; - switch (mid->midState) { + switch (mid->mid_state) { case MID_RESPONSE_RECEIVED: wdata->result = cifs_check_receive(mid, tcon->ses->server, 0); if (wdata->result != 0) @@ -2108,10 +2133,9 @@ cifs_writev_callback(struct mid_q_entry *mid) break; } - queue_work(system_nrt_wq, &wdata->work); + queue_work(cifsiod_wq, &wdata->work); DeleteMidQEntry(mid); - atomic_dec(&tcon->ses->server->inFlight); - wake_up(&tcon->ses->server->request_q); + cifs_add_credits(tcon->ses->server, 1); } /* cifs_async_writev - send an async write, and set up mid to handle result */ @@ -2122,7 +2146,6 @@ cifs_async_writev(struct cifs_writedata *wdata) WRITE_REQ *smb = NULL; int wct; struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); - struct inode *inode = wdata->cfile->dentry->d_inode; struct kvec *iov = NULL; if (tcon->ses->capabilities & CAP_LARGE_FILES) { @@ -2146,8 +2169,8 @@ cifs_async_writev(struct cifs_writedata *wdata) goto async_writev_out; } - smb->hdr.Pid = cpu_to_le16((__u16)wdata->cfile->pid); - smb->hdr.PidHigh = cpu_to_le16((__u16)(wdata->cfile->pid >> 16)); + smb->hdr.Pid = cpu_to_le16((__u16)wdata->pid); + smb->hdr.PidHigh = cpu_to_le16((__u16)(wdata->pid >> 16)); smb->AndXCommand = 0xFF; /* none */ smb->Fid = wdata->cfile->netfid; @@ -2165,15 +2188,13 @@ cifs_async_writev(struct cifs_writedata *wdata) iov[0].iov_len = be32_to_cpu(smb->hdr.smb_buf_length) + 4 + 1; iov[0].iov_base = smb; - /* marshal up the pages into iov array */ - wdata->bytes = 0; - for (i = 0; i < wdata->nr_pages; i++) { - iov[i + 1].iov_len = min(inode->i_size - - page_offset(wdata->pages[i]), - (loff_t)PAGE_CACHE_SIZE); - iov[i + 1].iov_base = kmap(wdata->pages[i]); - wdata->bytes += iov[i + 1].iov_len; - } + /* + * 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. + */ + wdata->marshal_iov(iov, wdata); cFYI(1, "async write at %llu %u bytes", wdata->offset, wdata->bytes); @@ -2418,8 +2439,7 @@ CIFSSMBLock(const int xid, struct cifs_tcon *tcon, (struct smb_hdr *) pSMB, &bytes_returned); cifs_small_buf_release(pSMB); } else { - rc = SendReceiveNoRsp(xid, tcon->ses, (struct smb_hdr *)pSMB, - timeout); + rc = SendReceiveNoRsp(xid, tcon->ses, (char *)pSMB, timeout); /* SMB buffer freed by function above */ } cifs_stats_inc(&tcon->num_locks); @@ -2586,7 +2606,7 @@ CIFSSMBClose(const int xid, struct cifs_tcon *tcon, int smb_file_id) pSMB->FileID = (__u16) smb_file_id; pSMB->LastWriteTime = 0xFFFFFFFF; pSMB->ByteCount = 0; - rc = SendReceiveNoRsp(xid, tcon->ses, (struct smb_hdr *) pSMB, 0); + rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0); cifs_stats_inc(&tcon->num_closes); if (rc) { if (rc != -EINTR) { @@ -2615,7 +2635,7 @@ CIFSSMBFlush(const int xid, struct cifs_tcon *tcon, int smb_file_id) pSMB->FileID = (__u16) smb_file_id; pSMB->ByteCount = 0; - rc = SendReceiveNoRsp(xid, tcon->ses, (struct smb_hdr *) pSMB, 0); + rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0); cifs_stats_inc(&tcon->num_flushes); if (rc) cERROR(1, "Send error in Flush = %d", rc); @@ -3872,13 +3892,12 @@ CIFSSMBSetCIFSACL(const int xid, struct cifs_tcon *tcon, __u16 fid, int rc = 0; int bytes_returned = 0; SET_SEC_DESC_REQ *pSMB = NULL; - NTRANSACT_RSP *pSMBr = NULL; + void *pSMBr; setCifsAclRetry: - rc = smb_init(SMB_COM_NT_TRANSACT, 19, tcon, (void **) &pSMB, - (void **) &pSMBr); + rc = smb_init(SMB_COM_NT_TRANSACT, 19, tcon, (void **) &pSMB, &pSMBr); if (rc) - return (rc); + return rc; pSMB->MaxSetupCount = 0; pSMB->Reserved = 0; @@ -3906,9 +3925,8 @@ setCifsAclRetry: pSMB->AclFlags = cpu_to_le32(aclflag); if (pntsd && acllen) { - memcpy((char *) &pSMBr->hdr.Protocol + data_offset, - (char *) pntsd, - acllen); + memcpy((char *)pSMBr + offsetof(struct smb_hdr, Protocol) + + data_offset, pntsd, acllen); inc_rfc1001_len(pSMB, byte_count + data_count); } else inc_rfc1001_len(pSMB, byte_count); @@ -4623,7 +4641,7 @@ CIFSFindClose(const int xid, struct cifs_tcon *tcon, pSMB->FileID = searchHandle; pSMB->ByteCount = 0; - rc = SendReceiveNoRsp(xid, tcon->ses, (struct smb_hdr *) pSMB, 0); + rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0); if (rc) cERROR(1, "Send error in FindClose = %d", rc); @@ -5644,7 +5662,7 @@ CIFSSMBSetFileSize(const int xid, struct cifs_tcon *tcon, __u64 size, pSMB->Reserved4 = 0; inc_rfc1001_len(pSMB, byte_count); pSMB->ByteCount = cpu_to_le16(byte_count); - rc = SendReceiveNoRsp(xid, tcon->ses, (struct smb_hdr *) pSMB, 0); + rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0); if (rc) { cFYI(1, "Send error in SetFileInfo (SetFileSize) = %d", rc); } @@ -5688,7 +5706,8 @@ CIFSSMBSetFileInfo(const int xid, struct cifs_tcon *tcon, param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4; offset = param_offset + params; - data_offset = (char *) (&pSMB->hdr.Protocol) + offset; + data_offset = (char *)pSMB + + offsetof(struct smb_hdr, Protocol) + offset; count = sizeof(FILE_BASIC_INFO); pSMB->MaxParameterCount = cpu_to_le16(2); @@ -5713,7 +5732,7 @@ CIFSSMBSetFileInfo(const int xid, struct cifs_tcon *tcon, inc_rfc1001_len(pSMB, byte_count); pSMB->ByteCount = cpu_to_le16(byte_count); memcpy(data_offset, data, sizeof(FILE_BASIC_INFO)); - rc = SendReceiveNoRsp(xid, tcon->ses, (struct smb_hdr *) pSMB, 0); + rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0); if (rc) cFYI(1, "Send error in Set Time (SetFileInfo) = %d", rc); @@ -5772,7 +5791,7 @@ CIFSSMBSetFileDisposition(const int xid, struct cifs_tcon *tcon, inc_rfc1001_len(pSMB, byte_count); pSMB->ByteCount = cpu_to_le16(byte_count); *data_offset = delete_file ? 1 : 0; - rc = SendReceiveNoRsp(xid, tcon->ses, (struct smb_hdr *) pSMB, 0); + rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0); if (rc) cFYI(1, "Send error in SetFileDisposition = %d", rc); @@ -5957,7 +5976,7 @@ CIFSSMBUnixSetFileInfo(const int xid, struct cifs_tcon *tcon, u16 fid, u32 pid_of_opener) { struct smb_com_transaction2_sfi_req *pSMB = NULL; - FILE_UNIX_BASIC_INFO *data_offset; + char *data_offset; int rc = 0; u16 params, param_offset, offset, byte_count, count; @@ -5979,8 +5998,9 @@ CIFSSMBUnixSetFileInfo(const int xid, struct cifs_tcon *tcon, param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4; offset = param_offset + params; - data_offset = (FILE_UNIX_BASIC_INFO *) - ((char *)(&pSMB->hdr.Protocol) + offset); + data_offset = (char *)pSMB + + offsetof(struct smb_hdr, Protocol) + offset; + count = sizeof(FILE_UNIX_BASIC_INFO); pSMB->MaxParameterCount = cpu_to_le16(2); @@ -6002,9 +6022,9 @@ CIFSSMBUnixSetFileInfo(const int xid, struct cifs_tcon *tcon, inc_rfc1001_len(pSMB, byte_count); pSMB->ByteCount = cpu_to_le16(byte_count); - cifs_fill_unix_set_info(data_offset, args); + cifs_fill_unix_set_info((FILE_UNIX_BASIC_INFO *)data_offset, args); - rc = SendReceiveNoRsp(xid, tcon->ses, (struct smb_hdr *) pSMB, 0); + rc = SendReceiveNoRsp(xid, tcon->ses, (char *) pSMB, 0); if (rc) cFYI(1, "Send error in Set Time (SetFileInfo) = %d", rc); |