smb: move client and server files to common directory fs/smb

Move CIFS/SMB3 related client and server files (cifs.ko and ksmbd.ko
and helper modules) to new fs/smb subdirectory:

   fs/cifs --> fs/smb/client
   fs/ksmbd --> fs/smb/server
   fs/smbfs_common --> fs/smb/common

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

1 files changed, 0 insertions, 1326 deletions

diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
deleted file mode 100644
index cd914be905b2..000000000000
--- a/fs/cifs/misc.c
+++ /dev/null
@@ -1,1326 +0,0 @@
-// SPDX-License-Identifier: LGPL-2.1
-/*
- *
- *   Copyright (C) International Business Machines  Corp., 2002,2008
- *   Author(s): Steve French (sfrench@us.ibm.com)
- *
- */
-
-#include <linux/slab.h>
-#include <linux/ctype.h>
-#include <linux/mempool.h>
-#include <linux/vmalloc.h>
-#include "cifspdu.h"
-#include "cifsglob.h"
-#include "cifsproto.h"
-#include "cifs_debug.h"
-#include "smberr.h"
-#include "nterr.h"
-#include "cifs_unicode.h"
-#include "smb2pdu.h"
-#include "cifsfs.h"
-#ifdef CONFIG_CIFS_DFS_UPCALL
-#include "dns_resolve.h"
-#include "dfs_cache.h"
-#include "dfs.h"
-#endif
-#include "fs_context.h"
-#include "cached_dir.h"
-
-extern mempool_t *cifs_sm_req_poolp;
-extern mempool_t *cifs_req_poolp;
-
-/* The xid serves as a useful identifier for each incoming vfs request,
-   in a similar way to the mid which is useful to track each sent smb,
-   and CurrentXid can also provide a running counter (although it
-   will eventually wrap past zero) of the total vfs operations handled
-   since the cifs fs was mounted */
-
-unsigned int
-_get_xid(void)
-{
-	unsigned int xid;
-
-	spin_lock(&GlobalMid_Lock);
-	GlobalTotalActiveXid++;
-
-	/* keep high water mark for number of simultaneous ops in filesystem */
-	if (GlobalTotalActiveXid > GlobalMaxActiveXid)
-		GlobalMaxActiveXid = GlobalTotalActiveXid;
-	if (GlobalTotalActiveXid > 65000)
-		cifs_dbg(FYI, "warning: more than 65000 requests active\n");
-	xid = GlobalCurrentXid++;
-	spin_unlock(&GlobalMid_Lock);
-	return xid;
-}
-
-void
-_free_xid(unsigned int xid)
-{
-	spin_lock(&GlobalMid_Lock);
-	/* if (GlobalTotalActiveXid == 0)
-		BUG(); */
-	GlobalTotalActiveXid--;
-	spin_unlock(&GlobalMid_Lock);
-}
-
-struct cifs_ses *
-sesInfoAlloc(void)
-{
-	struct cifs_ses *ret_buf;
-
-	ret_buf = kzalloc(sizeof(struct cifs_ses), GFP_KERNEL);
-	if (ret_buf) {
-		atomic_inc(&sesInfoAllocCount);
-		spin_lock_init(&ret_buf->ses_lock);
-		ret_buf->ses_status = SES_NEW;
-		++ret_buf->ses_count;
-		INIT_LIST_HEAD(&ret_buf->smb_ses_list);
-		INIT_LIST_HEAD(&ret_buf->tcon_list);
-		mutex_init(&ret_buf->session_mutex);
-		spin_lock_init(&ret_buf->iface_lock);
-		INIT_LIST_HEAD(&ret_buf->iface_list);
-		spin_lock_init(&ret_buf->chan_lock);
-	}
-	return ret_buf;
-}
-
-void
-sesInfoFree(struct cifs_ses *buf_to_free)
-{
-	struct cifs_server_iface *iface = NULL, *niface = NULL;
-
-	if (buf_to_free == NULL) {
-		cifs_dbg(FYI, "Null buffer passed to sesInfoFree\n");
-		return;
-	}
-
-	atomic_dec(&sesInfoAllocCount);
-	kfree(buf_to_free->serverOS);
-	kfree(buf_to_free->serverDomain);
-	kfree(buf_to_free->serverNOS);
-	kfree_sensitive(buf_to_free->password);
-	kfree(buf_to_free->user_name);
-	kfree(buf_to_free->domainName);
-	kfree_sensitive(buf_to_free->auth_key.response);
-	spin_lock(&buf_to_free->iface_lock);
-	list_for_each_entry_safe(iface, niface, &buf_to_free->iface_list,
-				 iface_head)
-		kref_put(&iface->refcount, release_iface);
-	spin_unlock(&buf_to_free->iface_lock);
-	kfree_sensitive(buf_to_free);
-}
-
-struct cifs_tcon *
-tconInfoAlloc(void)
-{
-	struct cifs_tcon *ret_buf;
-
-	ret_buf = kzalloc(sizeof(*ret_buf), GFP_KERNEL);
-	if (!ret_buf)
-		return NULL;
-	ret_buf->cfids = init_cached_dirs();
-	if (!ret_buf->cfids) {
-		kfree(ret_buf);
-		return NULL;
-	}
-
-	atomic_inc(&tconInfoAllocCount);
-	ret_buf->status = TID_NEW;
-	++ret_buf->tc_count;
-	spin_lock_init(&ret_buf->tc_lock);
-	INIT_LIST_HEAD(&ret_buf->openFileList);
-	INIT_LIST_HEAD(&ret_buf->tcon_list);
-	spin_lock_init(&ret_buf->open_file_lock);
-	spin_lock_init(&ret_buf->stat_lock);
-	atomic_set(&ret_buf->num_local_opens, 0);
-	atomic_set(&ret_buf->num_remote_opens, 0);
-#ifdef CONFIG_CIFS_DFS_UPCALL
-	INIT_LIST_HEAD(&ret_buf->dfs_ses_list);
-#endif
-
-	return ret_buf;
-}
-
-void
-tconInfoFree(struct cifs_tcon *tcon)
-{
-	if (tcon == NULL) {
-		cifs_dbg(FYI, "Null buffer passed to tconInfoFree\n");
-		return;
-	}
-	free_cached_dirs(tcon->cfids);
-	atomic_dec(&tconInfoAllocCount);
-	kfree(tcon->nativeFileSystem);
-	kfree_sensitive(tcon->password);
-#ifdef CONFIG_CIFS_DFS_UPCALL
-	dfs_put_root_smb_sessions(&tcon->dfs_ses_list);
-#endif
-	kfree(tcon);
-}
-
-struct smb_hdr *
-cifs_buf_get(void)
-{
-	struct smb_hdr *ret_buf = NULL;
-	/*
-	 * SMB2 header is bigger than CIFS one - no problems to clean some
-	 * more bytes for CIFS.
-	 */
-	size_t buf_size = sizeof(struct smb2_hdr);
-
-	/*
-	 * We could use negotiated size instead of max_msgsize -
-	 * but it may be more efficient to always alloc same size
-	 * albeit slightly larger than necessary and maxbuffersize
-	 * defaults to this and can not be bigger.
-	 */
-	ret_buf = mempool_alloc(cifs_req_poolp, GFP_NOFS);
-
-	/* clear the first few header bytes */
-	/* for most paths, more is cleared in header_assemble */
-	memset(ret_buf, 0, buf_size + 3);
-	atomic_inc(&buf_alloc_count);
-#ifdef CONFIG_CIFS_STATS2
-	atomic_inc(&total_buf_alloc_count);
-#endif /* CONFIG_CIFS_STATS2 */
-
-	return ret_buf;
-}
-
-void
-cifs_buf_release(void *buf_to_free)
-{
-	if (buf_to_free == NULL) {
-		/* cifs_dbg(FYI, "Null buffer passed to cifs_buf_release\n");*/
-		return;
-	}
-	mempool_free(buf_to_free, cifs_req_poolp);
-
-	atomic_dec(&buf_alloc_count);
-	return;
-}
-
-struct smb_hdr *
-cifs_small_buf_get(void)
-{
-	struct smb_hdr *ret_buf = NULL;
-
-/* We could use negotiated size instead of max_msgsize -
-   but it may be more efficient to always alloc same size
-   albeit slightly larger than necessary and maxbuffersize
-   defaults to this and can not be bigger */
-	ret_buf = mempool_alloc(cifs_sm_req_poolp, GFP_NOFS);
-	/* No need to clear memory here, cleared in header assemble */
-	/*	memset(ret_buf, 0, sizeof(struct smb_hdr) + 27);*/
-	atomic_inc(&small_buf_alloc_count);
-#ifdef CONFIG_CIFS_STATS2
-	atomic_inc(&total_small_buf_alloc_count);
-#endif /* CONFIG_CIFS_STATS2 */
-
-	return ret_buf;
-}
-
-void
-cifs_small_buf_release(void *buf_to_free)
-{
-
-	if (buf_to_free == NULL) {
-		cifs_dbg(FYI, "Null buffer passed to cifs_small_buf_release\n");
-		return;
-	}
-	mempool_free(buf_to_free, cifs_sm_req_poolp);
-
-	atomic_dec(&small_buf_alloc_count);
-	return;
-}
-
-void
-free_rsp_buf(int resp_buftype, void *rsp)
-{
-	if (resp_buftype == CIFS_SMALL_BUFFER)
-		cifs_small_buf_release(rsp);
-	else if (resp_buftype == CIFS_LARGE_BUFFER)
-		cifs_buf_release(rsp);
-}
-
-/* NB: MID can not be set if treeCon not passed in, in that
-   case it is responsbility of caller to set the mid */
-void
-header_assemble(struct smb_hdr *buffer, char smb_command /* command */ ,
-		const struct cifs_tcon *treeCon, int word_count
-		/* length of fixed section (word count) in two byte units  */)
-{
-	char *temp = (char *) buffer;
-
-	memset(temp, 0, 256); /* bigger than MAX_CIFS_HDR_SIZE */
-
-	buffer->smb_buf_length = cpu_to_be32(
-	    (2 * word_count) + sizeof(struct smb_hdr) -
-	    4 /*  RFC 1001 length field does not count */  +
-	    2 /* for bcc field itself */) ;
-
-	buffer->Protocol[0] = 0xFF;
-	buffer->Protocol[1] = 'S';
-	buffer->Protocol[2] = 'M';
-	buffer->Protocol[3] = 'B';
-	buffer->Command = smb_command;
-	buffer->Flags = 0x00;	/* case sensitive */
-	buffer->Flags2 = SMBFLG2_KNOWS_LONG_NAMES;
-	buffer->Pid = cpu_to_le16((__u16)current->tgid);
-	buffer->PidHigh = cpu_to_le16((__u16)(current->tgid >> 16));
-	if (treeCon) {
-		buffer->Tid = treeCon->tid;
-		if (treeCon->ses) {
-			if (treeCon->ses->capabilities & CAP_UNICODE)
-				buffer->Flags2 |= SMBFLG2_UNICODE;
-			if (treeCon->ses->capabilities & CAP_STATUS32)
-				buffer->Flags2 |= SMBFLG2_ERR_STATUS;
-
-			/* Uid is not converted */
-			buffer->Uid = treeCon->ses->Suid;
-			if (treeCon->ses->server)
-				buffer->Mid = get_next_mid(treeCon->ses->server);
-		}
-		if (treeCon->Flags & SMB_SHARE_IS_IN_DFS)
-			buffer->Flags2 |= SMBFLG2_DFS;
-		if (treeCon->nocase)
-			buffer->Flags  |= SMBFLG_CASELESS;
-		if ((treeCon->ses) && (treeCon->ses->server))
-			if (treeCon->ses->server->sign)
-				buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
-	}
-
-/*  endian conversion of flags is now done just before sending */
-	buffer->WordCount = (char) word_count;
-	return;
-}
-
-static int
-check_smb_hdr(struct smb_hdr *smb)
-{
-	/* does it have the right SMB "signature" ? */
-	if (*(__le32 *) smb->Protocol != cpu_to_le32(0x424d53ff)) {
-		cifs_dbg(VFS, "Bad protocol string signature header 0x%x\n",
-			 *(unsigned int *)smb->Protocol);
-		return 1;
-	}
-
-	/* if it's a response then accept */
-	if (smb->Flags & SMBFLG_RESPONSE)
-		return 0;
-
-	/* only one valid case where server sends us request */
-	if (smb->Command == SMB_COM_LOCKING_ANDX)
-		return 0;
-
-	cifs_dbg(VFS, "Server sent request, not response. mid=%u\n",
-		 get_mid(smb));
-	return 1;
-}
-
-int
-checkSMB(char *buf, unsigned int total_read, struct TCP_Server_Info *server)
-{
-	struct smb_hdr *smb = (struct smb_hdr *)buf;
-	__u32 rfclen = be32_to_cpu(smb->smb_buf_length);
-	__u32 clc_len;  /* calculated length */
-	cifs_dbg(FYI, "checkSMB Length: 0x%x, smb_buf_length: 0x%x\n",
-		 total_read, rfclen);
-
-	/* is this frame too small to even get to a BCC? */
-	if (total_read < 2 + sizeof(struct smb_hdr)) {
-		if ((total_read >= sizeof(struct smb_hdr) - 1)
-			    && (smb->Status.CifsError != 0)) {
-			/* it's an error return */
-			smb->WordCount = 0;
-			/* some error cases do not return wct and bcc */
-			return 0;
-		} else if ((total_read == sizeof(struct smb_hdr) + 1) &&
-				(smb->WordCount == 0)) {
-			char *tmp = (char *)smb;
-			/* Need to work around a bug in two servers here */
-			/* First, check if the part of bcc they sent was zero */
-			if (tmp[sizeof(struct smb_hdr)] == 0) {
-				/* some servers return only half of bcc
-				 * on simple responses (wct, bcc both zero)
-				 * in particular have seen this on
-				 * ulogoffX and FindClose. This leaves
-				 * one byte of bcc potentially unitialized
-				 */
-				/* zero rest of bcc */
-				tmp[sizeof(struct smb_hdr)+1] = 0;
-				return 0;
-			}
-			cifs_dbg(VFS, "rcvd invalid byte count (bcc)\n");
-		} else {
-			cifs_dbg(VFS, "Length less than smb header size\n");
-		}
-		return -EIO;
-	}
-
-	/* otherwise, there is enough to get to the BCC */
-	if (check_smb_hdr(smb))
-		return -EIO;
-	clc_len = smbCalcSize(smb);
-
-	if (4 + rfclen != total_read) {
-		cifs_dbg(VFS, "Length read does not match RFC1001 length %d\n",
-			 rfclen);
-		return -EIO;
-	}
-
-	if (4 + rfclen != clc_len) {
-		__u16 mid = get_mid(smb);
-		/* check if bcc wrapped around for large read responses */
-		if ((rfclen > 64 * 1024) && (rfclen > clc_len)) {
-			/* check if lengths match mod 64K */
-			if (((4 + rfclen) & 0xFFFF) == (clc_len & 0xFFFF))
-				return 0; /* bcc wrapped */
-		}
-		cifs_dbg(FYI, "Calculated size %u vs length %u mismatch for mid=%u\n",
-			 clc_len, 4 + rfclen, mid);
-
-		if (4 + rfclen < clc_len) {
-			cifs_dbg(VFS, "RFC1001 size %u smaller than SMB for mid=%u\n",
-				 rfclen, mid);
-			return -EIO;
-		} else if (rfclen > clc_len + 512) {
-			/*
-			 * Some servers (Windows XP in particular) send more
-			 * data than the lengths in the SMB packet would
-			 * indicate on certain calls (byte range locks and
-			 * trans2 find first calls in particular). While the
-			 * client can handle such a frame by ignoring the
-			 * trailing data, we choose limit the amount of extra
-			 * data to 512 bytes.
-			 */
-			cifs_dbg(VFS, "RFC1001 size %u more than 512 bytes larger than SMB for mid=%u\n",
-				 rfclen, mid);
-			return -EIO;
-		}
-	}
-	return 0;
-}
-
-bool
-is_valid_oplock_break(char *buffer, struct TCP_Server_Info *srv)
-{
-	struct smb_hdr *buf = (struct smb_hdr *)buffer;
-	struct smb_com_lock_req *pSMB = (struct smb_com_lock_req *)buf;
-	struct TCP_Server_Info *pserver;
-	struct cifs_ses *ses;
-	struct cifs_tcon *tcon;
-	struct cifsInodeInfo *pCifsInode;
-	struct cifsFileInfo *netfile;
-
-	cifs_dbg(FYI, "Checking for oplock break or dnotify response\n");
-	if ((pSMB->hdr.Command == SMB_COM_NT_TRANSACT) &&
-	   (pSMB->hdr.Flags & SMBFLG_RESPONSE)) {
-		struct smb_com_transaction_change_notify_rsp *pSMBr =
-			(struct smb_com_transaction_change_notify_rsp *)buf;
-		struct file_notify_information *pnotify;
-		__u32 data_offset = 0;
-		size_t len = srv->total_read - sizeof(pSMBr->hdr.smb_buf_length);
-
-		if (get_bcc(buf) > sizeof(struct file_notify_information)) {
-			data_offset = le32_to_cpu(pSMBr->DataOffset);
-
-			if (data_offset >
-			    len - sizeof(struct file_notify_information)) {
-				cifs_dbg(FYI, "Invalid data_offset %u\n",
-					 data_offset);
-				return true;
-			}
-			pnotify = (struct file_notify_information *)
-				((char *)&pSMBr->hdr.Protocol + data_offset);
-			cifs_dbg(FYI, "dnotify on %s Action: 0x%x\n",
-				 pnotify->FileName, pnotify->Action);
-			/*   cifs_dump_mem("Rcvd notify Data: ",buf,
-				sizeof(struct smb_hdr)+60); */
-			return true;
-		}
-		if (pSMBr->hdr.Status.CifsError) {
-			cifs_dbg(FYI, "notify err 0x%x\n",
-				 pSMBr->hdr.Status.CifsError);
-			return true;
-		}
-		return false;
-	}
-	if (pSMB->hdr.Command != SMB_COM_LOCKING_ANDX)
-		return false;
-	if (pSMB->hdr.Flags & SMBFLG_RESPONSE) {
-		/* no sense logging error on invalid handle on oplock
-		   break - harmless race between close request and oplock
-		   break response is expected from time to time writing out
-		   large dirty files cached on the client */
-		if ((NT_STATUS_INVALID_HANDLE) ==
-		   le32_to_cpu(pSMB->hdr.Status.CifsError)) {
-			cifs_dbg(FYI, "Invalid handle on oplock break\n");
-			return true;
-		} else if (ERRbadfid ==
-		   le16_to_cpu(pSMB->hdr.Status.DosError.Error)) {
-			return true;
-		} else {
-			return false; /* on valid oplock brk we get "request" */
-		}
-	}
-	if (pSMB->hdr.WordCount != 8)
-		return false;
-
-	cifs_dbg(FYI, "oplock type 0x%x level 0x%x\n",
-		 pSMB->LockType, pSMB->OplockLevel);
-	if (!(pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE))
-		return false;
-
-	/* If server is a channel, select the primary channel */
-	pserver = CIFS_SERVER_IS_CHAN(srv) ? srv->primary_server : srv;
-
-	/* look up tcon based on tid & uid */
-	spin_lock(&cifs_tcp_ses_lock);
-	list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
-		list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
-			if (tcon->tid != buf->Tid)
-				continue;
-
-			cifs_stats_inc(&tcon->stats.cifs_stats.num_oplock_brks);
-			spin_lock(&tcon->open_file_lock);
-			list_for_each_entry(netfile, &tcon->openFileList, tlist) {
-				if (pSMB->Fid != netfile->fid.netfid)
-					continue;
-
-				cifs_dbg(FYI, "file id match, oplock break\n");
-				pCifsInode = CIFS_I(d_inode(netfile->dentry));
-
-				set_bit(CIFS_INODE_PENDING_OPLOCK_BREAK,
-					&pCifsInode->flags);
-
-				netfile->oplock_epoch = 0;
-				netfile->oplock_level = pSMB->OplockLevel;
-				netfile->oplock_break_cancelled = false;
-				cifs_queue_oplock_break(netfile);
-
-				spin_unlock(&tcon->open_file_lock);
-				spin_unlock(&cifs_tcp_ses_lock);
-				return true;
-			}
-			spin_unlock(&tcon->open_file_lock);
-			spin_unlock(&cifs_tcp_ses_lock);
-			cifs_dbg(FYI, "No matching file for oplock break\n");
-			return true;
-		}
-	}
-	spin_unlock(&cifs_tcp_ses_lock);
-	cifs_dbg(FYI, "Can not process oplock break for non-existent connection\n");
-	return true;
-}
-
-void
-dump_smb(void *buf, int smb_buf_length)
-{
-	if (traceSMB == 0)
-		return;
-
-	print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_NONE, 8, 2, buf,
-		       smb_buf_length, true);
-}
-
-void
-cifs_autodisable_serverino(struct cifs_sb_info *cifs_sb)
-{
-	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
-		struct cifs_tcon *tcon = NULL;
-
-		if (cifs_sb->master_tlink)
-			tcon = cifs_sb_master_tcon(cifs_sb);
-
-		cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
-		cifs_sb->mnt_cifs_serverino_autodisabled = true;
-		cifs_dbg(VFS, "Autodisabling the use of server inode numbers on %s\n",
-			 tcon ? tcon->tree_name : "new server");
-		cifs_dbg(VFS, "The server doesn't seem to support them properly or the files might be on different servers (DFS)\n");
-		cifs_dbg(VFS, "Hardlinks will not be recognized on this mount. Consider mounting with the \"noserverino\" option to silence this message.\n");
-
-	}
-}
-
-void cifs_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock)
-{
-	oplock &= 0xF;
-
-	if (oplock == OPLOCK_EXCLUSIVE) {
-		cinode->oplock = CIFS_CACHE_WRITE_FLG | CIFS_CACHE_READ_FLG;
-		cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
-			 &cinode->netfs.inode);
-	} else if (oplock == OPLOCK_READ) {
-		cinode->oplock = CIFS_CACHE_READ_FLG;
-		cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
-			 &cinode->netfs.inode);
-	} else
-		cinode->oplock = 0;
-}
-
-/*
- * We wait for oplock breaks to be processed before we attempt to perform
- * writes.
- */
-int cifs_get_writer(struct cifsInodeInfo *cinode)
-{
-	int rc;
-
-start:
-	rc = wait_on_bit(&cinode->flags, CIFS_INODE_PENDING_OPLOCK_BREAK,
-			 TASK_KILLABLE);
-	if (rc)
-		return rc;
-
-	spin_lock(&cinode->writers_lock);
-	if (!cinode->writers)
-		set_bit(CIFS_INODE_PENDING_WRITERS, &cinode->flags);
-	cinode->writers++;
-	/* Check to see if we have started servicing an oplock break */
-	if (test_bit(CIFS_INODE_PENDING_OPLOCK_BREAK, &cinode->flags)) {
-		cinode->writers--;
-		if (cinode->writers == 0) {
-			clear_bit(CIFS_INODE_PENDING_WRITERS, &cinode->flags);
-			wake_up_bit(&cinode->flags, CIFS_INODE_PENDING_WRITERS);
-		}
-		spin_unlock(&cinode->writers_lock);
-		goto start;
-	}
-	spin_unlock(&cinode->writers_lock);
-	return 0;
-}
-
-void cifs_put_writer(struct cifsInodeInfo *cinode)
-{
-	spin_lock(&cinode->writers_lock);
-	cinode->writers--;
-	if (cinode->writers == 0) {
-		clear_bit(CIFS_INODE_PENDING_WRITERS, &cinode->flags);
-		wake_up_bit(&cinode->flags, CIFS_INODE_PENDING_WRITERS);
-	}
-	spin_unlock(&cinode->writers_lock);
-}
-
-/**
- * cifs_queue_oplock_break - queue the oplock break handler for cfile
- * @cfile: The file to break the oplock on
- *
- * This function is called from the demultiplex thread when it
- * receives an oplock break for @cfile.
- *
- * Assumes the tcon->open_file_lock is held.
- * Assumes cfile->file_info_lock is NOT held.
- */
-void cifs_queue_oplock_break(struct cifsFileInfo *cfile)
-{
-	/*
-	 * Bump the handle refcount now while we hold the
-	 * open_file_lock to enforce the validity of it for the oplock
-	 * break handler. The matching put is done at the end of the
-	 * handler.
-	 */
-	cifsFileInfo_get(cfile);
-
-	queue_work(cifsoplockd_wq, &cfile->oplock_break);
-}
-
-void cifs_done_oplock_break(struct cifsInodeInfo *cinode)
-{
-	clear_bit(CIFS_INODE_PENDING_OPLOCK_BREAK, &cinode->flags);
-	wake_up_bit(&cinode->flags, CIFS_INODE_PENDING_OPLOCK_BREAK);
-}
-
-bool
-backup_cred(struct cifs_sb_info *cifs_sb)
-{
-	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID) {
-		if (uid_eq(cifs_sb->ctx->backupuid, current_fsuid()))
-			return true;
-	}
-	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID) {
-		if (in_group_p(cifs_sb->ctx->backupgid))
-			return true;
-	}
-
-	return false;
-}
-
-void
-cifs_del_pending_open(struct cifs_pending_open *open)
-{
-	spin_lock(&tlink_tcon(open->tlink)->open_file_lock);
-	list_del(&open->olist);
-	spin_unlock(&tlink_tcon(open->tlink)->open_file_lock);
-}
-
-void
-cifs_add_pending_open_locked(struct cifs_fid *fid, struct tcon_link *tlink,
-			     struct cifs_pending_open *open)
-{
-	memcpy(open->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
-	open->oplock = CIFS_OPLOCK_NO_CHANGE;
-	open->tlink = tlink;
-	fid->pending_open = open;
-	list_add_tail(&open->olist, &tlink_tcon(tlink)->pending_opens);
-}
-
-void
-cifs_add_pending_open(struct cifs_fid *fid, struct tcon_link *tlink,
-		      struct cifs_pending_open *open)
-{
-	spin_lock(&tlink_tcon(tlink)->open_file_lock);
-	cifs_add_pending_open_locked(fid, tlink, open);
-	spin_unlock(&tlink_tcon(open->tlink)->open_file_lock);
-}
-
-/*
- * Critical section which runs after acquiring deferred_lock.
- * As there is no reference count on cifs_deferred_close, pdclose
- * should not be used outside deferred_lock.
- */
-bool
-cifs_is_deferred_close(struct cifsFileInfo *cfile, struct cifs_deferred_close **pdclose)
-{
-	struct cifs_deferred_close *dclose;
-
-	list_for_each_entry(dclose, &CIFS_I(d_inode(cfile->dentry))->deferred_closes, dlist) {
-		if ((dclose->netfid == cfile->fid.netfid) &&
-			(dclose->persistent_fid == cfile->fid.persistent_fid) &&
-			(dclose->volatile_fid == cfile->fid.volatile_fid)) {
-			*pdclose = dclose;
-			return true;
-		}
-	}
-	return false;
-}
-
-/*
- * Critical section which runs after acquiring deferred_lock.
- */
-void
-cifs_add_deferred_close(struct cifsFileInfo *cfile, struct cifs_deferred_close *dclose)
-{
-	bool is_deferred = false;
-	struct cifs_deferred_close *pdclose;
-
-	is_deferred = cifs_is_deferred_close(cfile, &pdclose);
-	if (is_deferred) {
-		kfree(dclose);
-		return;
-	}
-
-	dclose->tlink = cfile->tlink;
-	dclose->netfid = cfile->fid.netfid;
-	dclose->persistent_fid = cfile->fid.persistent_fid;
-	dclose->volatile_fid = cfile->fid.volatile_fid;
-	list_add_tail(&dclose->dlist, &CIFS_I(d_inode(cfile->dentry))->deferred_closes);
-}
-
-/*
- * Critical section which runs after acquiring deferred_lock.
- */
-void
-cifs_del_deferred_close(struct cifsFileInfo *cfile)
-{
-	bool is_deferred = false;
-	struct cifs_deferred_close *dclose;
-
-	is_deferred = cifs_is_deferred_close(cfile, &dclose);
-	if (!is_deferred)
-		return;
-	list_del(&dclose->dlist);
-	kfree(dclose);
-}
-
-void
-cifs_close_deferred_file(struct cifsInodeInfo *cifs_inode)
-{
-	struct cifsFileInfo *cfile = NULL;
-	struct file_list *tmp_list, *tmp_next_list;
-	struct list_head file_head;
-
-	if (cifs_inode == NULL)
-		return;
-
-	INIT_LIST_HEAD(&file_head);
-	spin_lock(&cifs_inode->open_file_lock);
-	list_for_each_entry(cfile, &cifs_inode->openFileList, flist) {
-		if (delayed_work_pending(&cfile->deferred)) {
-			if (cancel_delayed_work(&cfile->deferred)) {
-				spin_lock(&cifs_inode->deferred_lock);
-				cifs_del_deferred_close(cfile);
-				spin_unlock(&cifs_inode->deferred_lock);
-
-				tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC);
-				if (tmp_list == NULL)
-					break;
-				tmp_list->cfile = cfile;
-				list_add_tail(&tmp_list->list, &file_head);
-			}
-		}
-	}
-	spin_unlock(&cifs_inode->open_file_lock);
-
-	list_for_each_entry_safe(tmp_list, tmp_next_list, &file_head, list) {
-		_cifsFileInfo_put(tmp_list->cfile, false, false);
-		list_del(&tmp_list->list);
-		kfree(tmp_list);
-	}
-}
-
-void
-cifs_close_all_deferred_files(struct cifs_tcon *tcon)
-{
-	struct cifsFileInfo *cfile;
-	struct file_list *tmp_list, *tmp_next_list;
-	struct list_head file_head;
-
-	INIT_LIST_HEAD(&file_head);
-	spin_lock(&tcon->open_file_lock);
-	list_for_each_entry(cfile, &tcon->openFileList, tlist) {
-		if (delayed_work_pending(&cfile->deferred)) {
-			if (cancel_delayed_work(&cfile->deferred)) {
-				spin_lock(&CIFS_I(d_inode(cfile->dentry))->deferred_lock);
-				cifs_del_deferred_close(cfile);
-				spin_unlock(&CIFS_I(d_inode(cfile->dentry))->deferred_lock);
-
-				tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC);
-				if (tmp_list == NULL)
-					break;
-				tmp_list->cfile = cfile;
-				list_add_tail(&tmp_list->list, &file_head);
-			}
-		}
-	}
-	spin_unlock(&tcon->open_file_lock);
-
-	list_for_each_entry_safe(tmp_list, tmp_next_list, &file_head, list) {
-		_cifsFileInfo_put(tmp_list->cfile, true, false);
-		list_del(&tmp_list->list);
-		kfree(tmp_list);
-	}
-}
-void
-cifs_close_deferred_file_under_dentry(struct cifs_tcon *tcon, const char *path)
-{
-	struct cifsFileInfo *cfile;
-	struct file_list *tmp_list, *tmp_next_list;
-	struct list_head file_head;
-	void *page;
-	const char *full_path;
-
-	INIT_LIST_HEAD(&file_head);
-	page = alloc_dentry_path();
-	spin_lock(&tcon->open_file_lock);
-	list_for_each_entry(cfile, &tcon->openFileList, tlist) {
-		full_path = build_path_from_dentry(cfile->dentry, page);
-		if (strstr(full_path, path)) {
-			if (delayed_work_pending(&cfile->deferred)) {
-				if (cancel_delayed_work(&cfile->deferred)) {
-					spin_lock(&CIFS_I(d_inode(cfile->dentry))->deferred_lock);
-					cifs_del_deferred_close(cfile);
-					spin_unlock(&CIFS_I(d_inode(cfile->dentry))->deferred_lock);
-
-					tmp_list = kmalloc(sizeof(struct file_list), GFP_ATOMIC);
-					if (tmp_list == NULL)
-						break;
-					tmp_list->cfile = cfile;
-					list_add_tail(&tmp_list->list, &file_head);
-				}
-			}
-		}
-	}
-	spin_unlock(&tcon->open_file_lock);
-
-	list_for_each_entry_safe(tmp_list, tmp_next_list, &file_head, list) {
-		_cifsFileInfo_put(tmp_list->cfile, true, false);
-		list_del(&tmp_list->list);
-		kfree(tmp_list);
-	}
-	free_dentry_path(page);
-}
-
-/* parses DFS referral V3 structure
- * caller is responsible for freeing target_nodes
- * returns:
- * - on success - 0
- * - on failure - errno
- */
-int
-parse_dfs_referrals(struct get_dfs_referral_rsp *rsp, u32 rsp_size,
-		    unsigned int *num_of_nodes,
-		    struct dfs_info3_param **target_nodes,
-		    const struct nls_table *nls_codepage, int remap,
-		    const char *searchName, bool is_unicode)
-{
-	int i, rc = 0;
-	char *data_end;
-	struct dfs_referral_level_3 *ref;
-
-	*num_of_nodes = le16_to_cpu(rsp->NumberOfReferrals);
-
-	if (*num_of_nodes < 1) {
-		cifs_dbg(VFS, "num_referrals: must be at least > 0, but we get num_referrals = %d\n",
-			 *num_of_nodes);
-		rc = -EINVAL;
-		goto parse_DFS_referrals_exit;
-	}
-
-	ref = (struct dfs_referral_level_3 *) &(rsp->referrals);
-	if (ref->VersionNumber != cpu_to_le16(3)) {
-		cifs_dbg(VFS, "Referrals of V%d version are not supported, should be V3\n",
-			 le16_to_cpu(ref->VersionNumber));
-		rc = -EINVAL;
-		goto parse_DFS_referrals_exit;
-	}
-
-	/* get the upper boundary of the resp buffer */
-	data_end = (char *)rsp + rsp_size;
-
-	cifs_dbg(FYI, "num_referrals: %d dfs flags: 0x%x ...\n",
-		 *num_of_nodes, le32_to_cpu(rsp->DFSFlags));
-
-	*target_nodes = kcalloc(*num_of_nodes, sizeof(struct dfs_info3_param),
-				GFP_KERNEL);
-	if (*target_nodes == NULL) {
-		rc = -ENOMEM;
-		goto parse_DFS_referrals_exit;
-	}
-
-	/* collect necessary data from referrals */
-	for (i = 0; i < *num_of_nodes; i++) {
-		char *temp;
-		int max_len;
-		struct dfs_info3_param *node = (*target_nodes)+i;
-
-		node->flags = le32_to_cpu(rsp->DFSFlags);
-		if (is_unicode) {
-			__le16 *tmp = kmalloc(strlen(searchName)*2 + 2,
-						GFP_KERNEL);
-			if (tmp == NULL) {
-				rc = -ENOMEM;
-				goto parse_DFS_referrals_exit;
-			}
-			cifsConvertToUTF16((__le16 *) tmp, searchName,
-					   PATH_MAX, nls_codepage, remap);
-			node->path_consumed = cifs_utf16_bytes(tmp,
-					le16_to_cpu(rsp->PathConsumed),
-					nls_codepage);
-			kfree(tmp);
-		} else
-			node->path_consumed = le16_to_cpu(rsp->PathConsumed);
-
-		node->server_type = le16_to_cpu(ref->ServerType);
-		node->ref_flag = le16_to_cpu(ref->ReferralEntryFlags);
-
-		/* copy DfsPath */
-		temp = (char *)ref + le16_to_cpu(ref->DfsPathOffset);
-		max_len = data_end - temp;
-		node->path_name = cifs_strndup_from_utf16(temp, max_len,
-						is_unicode, nls_codepage);
-		if (!node->path_name) {
-			rc = -ENOMEM;
-			goto parse_DFS_referrals_exit;
-		}
-
-		/* copy link target UNC */
-		temp = (char *)ref + le16_to_cpu(ref->NetworkAddressOffset);
-		max_len = data_end - temp;
-		node->node_name = cifs_strndup_from_utf16(temp, max_len,
-						is_unicode, nls_codepage);
-		if (!node->node_name) {
-			rc = -ENOMEM;
-			goto parse_DFS_referrals_exit;
-		}
-
-		node->ttl = le32_to_cpu(ref->TimeToLive);
-
-		ref++;
-	}
-
-parse_DFS_referrals_exit:
-	if (rc) {
-		free_dfs_info_array(*target_nodes, *num_of_nodes);
-		*target_nodes = NULL;
-		*num_of_nodes = 0;
-	}
-	return rc;
-}
-
-struct cifs_aio_ctx *
-cifs_aio_ctx_alloc(void)
-{
-	struct cifs_aio_ctx *ctx;
-
-	/*
-	 * Must use kzalloc to initialize ctx->bv to NULL and ctx->direct_io
-	 * to false so that we know when we have to unreference pages within
-	 * cifs_aio_ctx_release()
-	 */
-	ctx = kzalloc(sizeof(struct cifs_aio_ctx), GFP_KERNEL);
-	if (!ctx)
-		return NULL;
-
-	INIT_LIST_HEAD(&ctx->list);
-	mutex_init(&ctx->aio_mutex);
-	init_completion(&ctx->done);
-	kref_init(&ctx->refcount);
-	return ctx;
-}
-
-void
-cifs_aio_ctx_release(struct kref *refcount)
-{
-	struct cifs_aio_ctx *ctx = container_of(refcount,
-					struct cifs_aio_ctx, refcount);
-
-	cifsFileInfo_put(ctx->cfile);
-
-	/*
-	 * ctx->bv is only set if setup_aio_ctx_iter() was call successfuly
-	 * which means that iov_iter_extract_pages() was a success and thus
-	 * that we may have references or pins on pages that we need to
-	 * release.
-	 */
-	if (ctx->bv) {
-		if (ctx->should_dirty || ctx->bv_need_unpin) {
-			unsigned int i;
-
-			for (i = 0; i < ctx->nr_pinned_pages; i++) {
-				struct page *page = ctx->bv[i].bv_page;
-
-				if (ctx->should_dirty)
-					set_page_dirty(page);
-				if (ctx->bv_need_unpin)
-					unpin_user_page(page);
-			}
-		}
-		kvfree(ctx->bv);
-	}
-
-	kfree(ctx);
-}
-
-/**
- * cifs_alloc_hash - allocate hash and hash context together
- * @name: The name of the crypto hash algo
- * @sdesc: SHASH descriptor where to put the pointer to the hash TFM
- *
- * The caller has to make sure @sdesc is initialized to either NULL or
- * a valid context. It can be freed via cifs_free_hash().
- */
-int
-cifs_alloc_hash(const char *name, struct shash_desc **sdesc)
-{
-	int rc = 0;
-	struct crypto_shash *alg = NULL;
-
-	if (*sdesc)
-		return 0;
-
-	alg = crypto_alloc_shash(name, 0, 0);
-	if (IS_ERR(alg)) {
-		cifs_dbg(VFS, "Could not allocate shash TFM '%s'\n", name);
-		rc = PTR_ERR(alg);
-		*sdesc = NULL;
-		return rc;
-	}
-
-	*sdesc = kmalloc(sizeof(struct shash_desc) + crypto_shash_descsize(alg), GFP_KERNEL);
-	if (*sdesc == NULL) {
-		cifs_dbg(VFS, "no memory left to allocate shash TFM '%s'\n", name);
-		crypto_free_shash(alg);
-		return -ENOMEM;
-	}
-
-	(*sdesc)->tfm = alg;
-	return 0;
-}
-
-/**
- * cifs_free_hash - free hash and hash context together
- * @sdesc: Where to find the pointer to the hash TFM
- *
- * Freeing a NULL descriptor is safe.
- */
-void
-cifs_free_hash(struct shash_desc **sdesc)
-{
-	if (unlikely(!sdesc) || !*sdesc)
-		return;
-
-	if ((*sdesc)->tfm) {
-		crypto_free_shash((*sdesc)->tfm);
-		(*sdesc)->tfm = NULL;
-	}
-
-	kfree_sensitive(*sdesc);
-	*sdesc = NULL;
-}
-
-void extract_unc_hostname(const char *unc, const char **h, size_t *len)
-{
-	const char *end;
-
-	/* skip initial slashes */
-	while (*unc && (*unc == '\\' || *unc == '/'))
-		unc++;
-
-	end = unc;
-
-	while (*end && !(*end == '\\' || *end == '/'))
-		end++;
-
-	*h = unc;
-	*len = end - unc;
-}
-
-/**
- * copy_path_name - copy src path to dst, possibly truncating
- * @dst: The destination buffer
- * @src: The source name
- *
- * returns number of bytes written (including trailing nul)
- */
-int copy_path_name(char *dst, const char *src)
-{
-	int name_len;
-
-	/*
-	 * PATH_MAX includes nul, so if strlen(src) >= PATH_MAX it
-	 * will truncate and strlen(dst) will be PATH_MAX-1
-	 */
-	name_len = strscpy(dst, src, PATH_MAX);
-	if (WARN_ON_ONCE(name_len < 0))
-		name_len = PATH_MAX-1;
-
-	/* we count the trailing nul */
-	name_len++;
-	return name_len;
-}
-
-struct super_cb_data {
-	void *data;
-	struct super_block *sb;
-};
-
-static void tcp_super_cb(struct super_block *sb, void *arg)
-{
-	struct super_cb_data *sd = arg;
-	struct TCP_Server_Info *server = sd->data;
-	struct cifs_sb_info *cifs_sb;
-	struct cifs_tcon *tcon;
-
-	if (sd->sb)
-		return;
-
-	cifs_sb = CIFS_SB(sb);
-	tcon = cifs_sb_master_tcon(cifs_sb);
-	if (tcon->ses->server == server)
-		sd->sb = sb;
-}
-
-static struct super_block *__cifs_get_super(void (*f)(struct super_block *, void *),
-					    void *data)
-{
-	struct super_cb_data sd = {
-		.data = data,
-		.sb = NULL,
-	};
-	struct file_system_type **fs_type = (struct file_system_type *[]) {
-		&cifs_fs_type, &smb3_fs_type, NULL,
-	};
-
-	for (; *fs_type; fs_type++) {
-		iterate_supers_type(*fs_type, f, &sd);
-		if (sd.sb) {
-			/*
-			 * Grab an active reference in order to prevent automounts (DFS links)
-			 * of expiring and then freeing up our cifs superblock pointer while
-			 * we're doing failover.
-			 */
-			cifs_sb_active(sd.sb);
-			return sd.sb;
-		}
-	}
-	return ERR_PTR(-EINVAL);
-}
-
-static void __cifs_put_super(struct super_block *sb)
-{
-	if (!IS_ERR_OR_NULL(sb))
-		cifs_sb_deactive(sb);
-}
-
-struct super_block *cifs_get_tcp_super(struct TCP_Server_Info *server)
-{
-	return __cifs_get_super(tcp_super_cb, server);
-}
-
-void cifs_put_tcp_super(struct super_block *sb)
-{
-	__cifs_put_super(sb);
-}
-
-#ifdef CONFIG_CIFS_DFS_UPCALL
-int match_target_ip(struct TCP_Server_Info *server,
-		    const char *share, size_t share_len,
-		    bool *result)
-{
-	int rc;
-	char *target;
-	struct sockaddr_storage ss;
-
-	*result = false;
-
-	target = kzalloc(share_len + 3, GFP_KERNEL);
-	if (!target)
-		return -ENOMEM;
-
-	scnprintf(target, share_len + 3, "\\\\%.*s", (int)share_len, share);
-
-	cifs_dbg(FYI, "%s: target name: %s\n", __func__, target + 2);
-
-	rc = dns_resolve_server_name_to_ip(target, (struct sockaddr *)&ss, NULL);
-	kfree(target);
-
-	if (rc < 0)
-		return rc;
-
-	spin_lock(&server->srv_lock);
-	*result = cifs_match_ipaddr((struct sockaddr *)&server->dstaddr, (struct sockaddr *)&ss);
-	spin_unlock(&server->srv_lock);
-	cifs_dbg(FYI, "%s: ip addresses match: %u\n", __func__, *result);
-	return 0;
-}
-
-int cifs_update_super_prepath(struct cifs_sb_info *cifs_sb, char *prefix)
-{
-	kfree(cifs_sb->prepath);
-
-	if (prefix && *prefix) {
-		cifs_sb->prepath = cifs_sanitize_prepath(prefix, GFP_ATOMIC);
-		if (!cifs_sb->prepath)
-			return -ENOMEM;
-
-		convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb));
-	} else
-		cifs_sb->prepath = NULL;
-
-	cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH;
-	return 0;
-}
-
-/*
- * Handle weird Windows SMB server behaviour. It responds with
- * STATUS_OBJECT_NAME_INVALID code to SMB2 QUERY_INFO request for
- * "\<server>\<dfsname>\<linkpath>" DFS reference, where <dfsname> contains
- * non-ASCII unicode symbols.
- */
-int cifs_inval_name_dfs_link_error(const unsigned int xid,
-				   struct cifs_tcon *tcon,
-				   struct cifs_sb_info *cifs_sb,
-				   const char *full_path,
-				   bool *islink)
-{
-	struct cifs_ses *ses = tcon->ses;
-	size_t len;
-	char *path;
-	char *ref_path;
-
-	*islink = false;
-
-	/*
-	 * Fast path - skip check when @full_path doesn't have a prefix path to
-	 * look up or tcon is not DFS.
-	 */
-	if (strlen(full_path) < 2 || !cifs_sb ||
-	    (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS) ||
-	    !is_tcon_dfs(tcon) || !ses->server->origin_fullpath)
-		return 0;
-
-	/*
-	 * Slow path - tcon is DFS and @full_path has prefix path, so attempt
-	 * to get a referral to figure out whether it is an DFS link.
-	 */
-	len = strnlen(tcon->tree_name, MAX_TREE_SIZE + 1) + strlen(full_path) + 1;
-	path = kmalloc(len, GFP_KERNEL);
-	if (!path)
-		return -ENOMEM;
-
-	scnprintf(path, len, "%s%s", tcon->tree_name, full_path);
-	ref_path = dfs_cache_canonical_path(path + 1, cifs_sb->local_nls,
-					    cifs_remap(cifs_sb));
-	kfree(path);
-
-	if (IS_ERR(ref_path)) {
-		if (PTR_ERR(ref_path) != -EINVAL)
-			return PTR_ERR(ref_path);
-	} else {
-		struct dfs_info3_param *refs = NULL;
-		int num_refs = 0;
-
-		/*
-		 * XXX: we are not using dfs_cache_find() here because we might
-		 * end filling all the DFS cache and thus potentially
-		 * removing cached DFS targets that the client would eventually
-		 * need during failover.
-		 */
-		ses = CIFS_DFS_ROOT_SES(ses);
-		if (ses->server->ops->get_dfs_refer &&
-		    !ses->server->ops->get_dfs_refer(xid, ses, ref_path, &refs,
-						     &num_refs, cifs_sb->local_nls,
-						     cifs_remap(cifs_sb)))
-			*islink = refs[0].server_type == DFS_TYPE_LINK;
-		free_dfs_info_array(refs, num_refs);
-		kfree(ref_path);
-	}
-	return 0;
-}
-#endif
-
-int cifs_wait_for_server_reconnect(struct TCP_Server_Info *server, bool retry)
-{
-	int timeout = 10;
-	int rc;
-
-	spin_lock(&server->srv_lock);
-	if (server->tcpStatus != CifsNeedReconnect) {
-		spin_unlock(&server->srv_lock);
-		return 0;
-	}
-	timeout *= server->nr_targets;
-	spin_unlock(&server->srv_lock);
-
-	/*
-	 * Give demultiplex thread up to 10 seconds to each target available for
-	 * reconnect -- should be greater than cifs socket timeout which is 7
-	 * seconds.
-	 *
-	 * On "soft" mounts we wait once. Hard mounts keep retrying until
-	 * process is killed or server comes back on-line.
-	 */
-	do {
-		rc = wait_event_interruptible_timeout(server->response_q,
-						      (server->tcpStatus != CifsNeedReconnect),
-						      timeout * HZ);
-		if (rc < 0) {
-			cifs_dbg(FYI, "%s: aborting reconnect due to received signal\n",
-				 __func__);
-			return -ERESTARTSYS;
-		}
-
-		/* are we still trying to reconnect? */
-		spin_lock(&server->srv_lock);
-		if (server->tcpStatus != CifsNeedReconnect) {
-			spin_unlock(&server->srv_lock);
-			return 0;
-		}
-		spin_unlock(&server->srv_lock);
-	} while (retry);
-
-	cifs_dbg(FYI, "%s: gave up waiting on reconnect\n", __func__);
-	return -EHOSTDOWN;
-}