From 392e1c5dc9cc93a8fffbd6230c12c9f38693e634 Mon Sep 17 00:00:00 2001 From: Ronnie Sahlberg Date: Mon, 6 May 2019 10:00:02 +1000 Subject: [PATCH] cifs: rename and clarify CIFS_ASYNC_OP and CIFS_NO_RESP The flags were named confusingly. CIFS_ASYNC_OP now just means that we will not block waiting for credits to become available so we thus rename this to be CIFS_NON_BLOCKING. Change CIFS_NO_RESP to CIFS_NO_RSP_BUF to clarify that we will actually get a response from the server but we will not get/do not want a response buffer. Delete CIFSSMBNotify. This is an SMB1 function that is not used. Signed-off-by: Ronnie Sahlberg Signed-off-by: Steve French Reviewed-by: Pavel Shilovsky --- fs/cifs/cifsglob.h | 4 +- fs/cifs/cifssmb.c | 98 ++------------------------------------------- fs/cifs/smb2pdu.c | 10 ++--- fs/cifs/transport.c | 9 ++--- 4 files changed, 14 insertions(+), 107 deletions(-) diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 65faad3aa69a..c22ab330238c 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -1689,11 +1689,11 @@ static inline bool is_retryable_error(int error) /* Type of Request to SendReceive2 */ #define CIFS_BLOCKING_OP 1 /* operation can block */ -#define CIFS_ASYNC_OP 2 /* do not wait for response */ +#define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */ #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */ #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */ #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */ -#define CIFS_NO_RESP 0x040 /* no response buffer required */ +#define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */ /* Type of request operation */ #define CIFS_ECHO_OP 0x080 /* echo request */ diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 6050851edcb8..1fbd92843a73 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -860,7 +860,7 @@ CIFSSMBEcho(struct TCP_Server_Info *server) iov[1].iov_base = (char *)smb + 4; rc = cifs_call_async(server, &rqst, NULL, cifs_echo_callback, NULL, - server, CIFS_ASYNC_OP | CIFS_ECHO_OP, NULL); + server, CIFS_NON_BLOCKING | CIFS_ECHO_OP, NULL); if (rc) cifs_dbg(FYI, "Echo request failed: %d\n", rc); @@ -2508,8 +2508,8 @@ int cifs_lockv(const unsigned int xid, struct cifs_tcon *tcon, iov[1].iov_len = (num_unlock + num_lock) * sizeof(LOCKING_ANDX_RANGE); cifs_stats_inc(&tcon->stats.cifs_stats.num_locks); - rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP, - &rsp_iov); + rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, + CIFS_NO_RSP_BUF, &rsp_iov); cifs_small_buf_release(pSMB); if (rc) cifs_dbg(FYI, "Send error in cifs_lockv = %d\n", rc); @@ -2540,7 +2540,7 @@ CIFSSMBLock(const unsigned int xid, struct cifs_tcon *tcon, if (lockType == LOCKING_ANDX_OPLOCK_RELEASE) { /* no response expected */ - flags = CIFS_NO_SRV_RSP | CIFS_ASYNC_OP | CIFS_OBREAK_OP; + flags = CIFS_NO_SRV_RSP | CIFS_NON_BLOCKING | CIFS_OBREAK_OP; pSMB->Timeout = 0; } else if (waitFlag) { flags = CIFS_BLOCKING_OP; /* blocking operation, no timeout */ @@ -6567,93 +6567,3 @@ CIFSSMBSetEA(const unsigned int xid, struct cifs_tcon *tcon, return rc; } #endif - -#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* BB unused temporarily */ -/* - * Years ago the kernel added a "dnotify" function for Samba server, - * to allow network clients (such as Windows) to display updated - * lists of files in directory listings automatically when - * files are added by one user when another user has the - * same directory open on their desktop. The Linux cifs kernel - * client hooked into the kernel side of this interface for - * the same reason, but ironically when the VFS moved from - * "dnotify" to "inotify" it became harder to plug in Linux - * network file system clients (the most obvious use case - * for notify interfaces is when multiple users can update - * the contents of the same directory - exactly what network - * file systems can do) although the server (Samba) could - * still use it. For the short term we leave the worker - * function ifdeffed out (below) until inotify is fixed - * in the VFS to make it easier to plug in network file - * system clients. If inotify turns out to be permanently - * incompatible for network fs clients, we could instead simply - * expose this config flag by adding a future cifs (and smb2) notify ioctl. - */ -int CIFSSMBNotify(const unsigned int xid, struct cifs_tcon *tcon, - const int notify_subdirs, const __u16 netfid, - __u32 filter, struct file *pfile, int multishot, - const struct nls_table *nls_codepage) -{ - int rc = 0; - struct smb_com_transaction_change_notify_req *pSMB = NULL; - struct smb_com_ntransaction_change_notify_rsp *pSMBr = NULL; - struct dir_notify_req *dnotify_req; - int bytes_returned; - - cifs_dbg(FYI, "In CIFSSMBNotify for file handle %d\n", (int)netfid); - rc = smb_init(SMB_COM_NT_TRANSACT, 23, tcon, (void **) &pSMB, - (void **) &pSMBr); - if (rc) - return rc; - - pSMB->TotalParameterCount = 0 ; - pSMB->TotalDataCount = 0; - pSMB->MaxParameterCount = cpu_to_le32(2); - pSMB->MaxDataCount = cpu_to_le32(CIFSMaxBufSize & 0xFFFFFF00); - pSMB->MaxSetupCount = 4; - pSMB->Reserved = 0; - pSMB->ParameterOffset = 0; - pSMB->DataCount = 0; - pSMB->DataOffset = 0; - pSMB->SetupCount = 4; /* single byte does not need le conversion */ - pSMB->SubCommand = cpu_to_le16(NT_TRANSACT_NOTIFY_CHANGE); - pSMB->ParameterCount = pSMB->TotalParameterCount; - if (notify_subdirs) - pSMB->WatchTree = 1; /* one byte - no le conversion needed */ - pSMB->Reserved2 = 0; - pSMB->CompletionFilter = cpu_to_le32(filter); - pSMB->Fid = netfid; /* file handle always le */ - pSMB->ByteCount = 0; - - rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, - (struct smb_hdr *)pSMBr, &bytes_returned, - CIFS_ASYNC_OP); - if (rc) { - cifs_dbg(FYI, "Error in Notify = %d\n", rc); - } else { - /* Add file to outstanding requests */ - /* BB change to kmem cache alloc */ - dnotify_req = kmalloc( - sizeof(struct dir_notify_req), - GFP_KERNEL); - if (dnotify_req) { - dnotify_req->Pid = pSMB->hdr.Pid; - dnotify_req->PidHigh = pSMB->hdr.PidHigh; - dnotify_req->Mid = pSMB->hdr.Mid; - dnotify_req->Tid = pSMB->hdr.Tid; - dnotify_req->Uid = pSMB->hdr.Uid; - dnotify_req->netfid = netfid; - dnotify_req->pfile = pfile; - dnotify_req->filter = filter; - dnotify_req->multishot = multishot; - spin_lock(&GlobalMid_Lock); - list_add_tail(&dnotify_req->lhead, - &GlobalDnotifyReqList); - spin_unlock(&GlobalMid_Lock); - } else - rc = -ENOMEM; - } - cifs_buf_release(pSMB); - return rc; -} -#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */ diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 634800c0bc06..035a568b3dbd 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -1538,7 +1538,7 @@ SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) else if (server->sign) req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED; - flags |= CIFS_NO_RESP; + flags |= CIFS_NO_RSP_BUF; iov[0].iov_base = (char *)req; iov[0].iov_len = total_len; @@ -1739,7 +1739,7 @@ SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) if (smb3_encryption_required(tcon)) flags |= CIFS_TRANSFORM_REQ; - flags |= CIFS_NO_RESP; + flags |= CIFS_NO_RSP_BUF; iov[0].iov_base = (char *)req; iov[0].iov_len = total_len; @@ -4166,7 +4166,7 @@ SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, req->OplockLevel = oplock_level; req->sync_hdr.CreditRequest = cpu_to_le16(1); - flags |= CIFS_NO_RESP; + flags |= CIFS_NO_RSP_BUF; iov[0].iov_base = (char *)req; iov[0].iov_len = total_len; @@ -4440,7 +4440,7 @@ smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, struct kvec rsp_iov; int resp_buf_type; unsigned int count; - int flags = CIFS_NO_RESP; + int flags = CIFS_NO_RSP_BUF; unsigned int total_len; cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock); @@ -4533,7 +4533,7 @@ SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon, memcpy(req->LeaseKey, lease_key, 16); req->LeaseState = lease_state; - flags |= CIFS_NO_RESP; + flags |= CIFS_NO_RSP_BUF; iov[0].iov_base = (char *)req; iov[0].iov_len = total_len; diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index 5573e38b13f3..9a16ff4b9f5e 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -529,7 +529,7 @@ wait_for_free_credits(struct TCP_Server_Info *server, const int num_credits, return -EAGAIN; spin_lock(&server->req_lock); - if ((flags & CIFS_TIMEOUT_MASK) == CIFS_ASYNC_OP) { + if ((flags & CIFS_TIMEOUT_MASK) == CIFS_NON_BLOCKING) { /* oplock breaks must not be held up */ server->in_flight++; *credits -= 1; @@ -838,7 +838,7 @@ SendReceiveNoRsp(const unsigned int xid, struct cifs_ses *ses, iov[0].iov_base = in_buf; iov[0].iov_len = get_rfc1002_length(in_buf) + 4; - flags |= CIFS_NO_RESP; + flags |= CIFS_NO_RSP_BUF; rc = SendReceive2(xid, ses, iov, 1, &resp_buf_type, flags, &rsp_iov); cifs_dbg(NOISY, "SendRcvNoRsp flags %d rc %d\n", flags, rc); @@ -1151,7 +1151,7 @@ compound_send_recv(const unsigned int xid, struct cifs_ses *ses, flags & CIFS_LOG_ERROR); /* mark it so buf will not be freed by cifs_delete_mid */ - if ((flags & CIFS_NO_RESP) == 0) + if ((flags & CIFS_NO_RSP_BUF) == 0) midQ[i]->resp_buf = NULL; } @@ -1302,9 +1302,6 @@ SendReceive(const unsigned int xid, struct cifs_ses *ses, if (rc < 0) goto out; - if ((flags & CIFS_TIMEOUT_MASK) == CIFS_ASYNC_OP) - goto out; - rc = wait_for_response(ses->server, midQ); if (rc != 0) { send_cancel(ses->server, &rqst, midQ);