From: Ronnie Sahlberg <lsahlber@redhat.com>
Date: Mon, 6 May 2019 10:00:02 +1000
Subject: [PATCH] cifs: rename and clarify CIFS_ASYNC_OP and CIFS_NO_RESP
Git-commit: 392e1c5dc9cc93a8fffbd6230c12c9f38693e634
Patch-mainline: v5.2-rc1
References: bsc#1144333
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 <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Acked-by: Paulo Alcantara <palcantara@suse.de>
---
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);
--
2.22.0