smb: delete smb1ops.c and remove CIFS_ALLOW_INSECURE_LEGACY from

Makefile

Signed-off-by: Henrique Carvalho <henrique.carvalho@suse.com>

2 files changed, 0 insertions, 1195 deletions

diff --git a/fs/smb/client/Makefile b/fs/smb/client/Makefile
index e11985f2460b..08af20f47816 100644
--- a/fs/smb/client/Makefile
+++ b/fs/smb/client/Makefile
@@ -31,5 +31,3 @@ cifs-$(CONFIG_CIFS_FSCACHE) += fscache.o
 cifs-$(CONFIG_CIFS_SMB_DIRECT) += smbdirect.o
 
 cifs-$(CONFIG_CIFS_ROOT) += cifsroot.o
-
-cifs-$(CONFIG_CIFS_ALLOW_INSECURE_LEGACY) += smb1ops.o cifssmb.o
diff --git a/fs/smb/client/smb1ops.c b/fs/smb/client/smb1ops.c
deleted file mode 100644
index 8c03250d85ae..000000000000
--- a/fs/smb/client/smb1ops.c
+++ /dev/null
@@ -1,1193 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- *  SMB1 (CIFS) version specific operations
- *
- *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
- */
-
-#include <linux/pagemap.h>
-#include <linux/vfs.h>
-#include <uapi/linux/magic.h>
-#include "cifsglob.h"
-#include "cifsproto.h"
-#include "cifs_debug.h"
-#include "cifspdu.h"
-#include "cifs_unicode.h"
-#include "fs_context.h"
-
-/*
- * An NT cancel request header looks just like the original request except:
- *
- * The Command is SMB_COM_NT_CANCEL
- * The WordCount is zeroed out
- * The ByteCount is zeroed out
- *
- * This function mangles an existing request buffer into a
- * SMB_COM_NT_CANCEL request and then sends it.
- */
-static int
-send_nt_cancel(struct TCP_Server_Info *server, struct smb_rqst *rqst,
-	       struct mid_q_entry *mid)
-{
-	int rc = 0;
-	struct smb_hdr *in_buf = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
-
-	/* -4 for RFC1001 length and +2 for BCC field */
-	in_buf->smb_buf_length = cpu_to_be32(sizeof(struct smb_hdr) - 4  + 2);
-	in_buf->Command = SMB_COM_NT_CANCEL;
-	in_buf->WordCount = 0;
-	put_bcc(0, in_buf);
-
-	cifs_server_lock(server);
-	rc = cifs_sign_smb(in_buf, server, &mid->sequence_number);
-	if (rc) {
-		cifs_server_unlock(server);
-		return rc;
-	}
-
-	/*
-	 * The response to this call was already factored into the sequence
-	 * number when the call went out, so we must adjust it back downward
-	 * after signing here.
-	 */
-	--server->sequence_number;
-	rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length));
-	if (rc < 0)
-		server->sequence_number--;
-
-	cifs_server_unlock(server);
-
-	cifs_dbg(FYI, "issued NT_CANCEL for mid %u, rc = %d\n",
-		 get_mid(in_buf), rc);
-
-	return rc;
-}
-
-static bool
-cifs_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
-{
-	return ob1->fid.netfid == ob2->fid.netfid;
-}
-
-static unsigned int
-cifs_read_data_offset(char *buf)
-{
-	READ_RSP *rsp = (READ_RSP *)buf;
-	return le16_to_cpu(rsp->DataOffset);
-}
-
-static unsigned int
-cifs_read_data_length(char *buf, bool in_remaining)
-{
-	READ_RSP *rsp = (READ_RSP *)buf;
-	/* It's a bug reading remaining data for SMB1 packets */
-	WARN_ON(in_remaining);
-	return (le16_to_cpu(rsp->DataLengthHigh) << 16) +
-	       le16_to_cpu(rsp->DataLength);
-}
-
-static struct mid_q_entry *
-cifs_find_mid(struct TCP_Server_Info *server, char *buffer)
-{
-	struct smb_hdr *buf = (struct smb_hdr *)buffer;
-	struct mid_q_entry *mid;
-
-	spin_lock(&server->mid_lock);
-	list_for_each_entry(mid, &server->pending_mid_q, qhead) {
-		if (compare_mid(mid->mid, buf) &&
-		    mid->mid_state == MID_REQUEST_SUBMITTED &&
-		    le16_to_cpu(mid->command) == buf->Command) {
-			kref_get(&mid->refcount);
-			spin_unlock(&server->mid_lock);
-			return mid;
-		}
-	}
-	spin_unlock(&server->mid_lock);
-	return NULL;
-}
-
-static void
-cifs_add_credits(struct TCP_Server_Info *server,
-		 struct cifs_credits *credits, const int optype)
-{
-	spin_lock(&server->req_lock);
-	server->credits += credits->value;
-	server->in_flight--;
-	spin_unlock(&server->req_lock);
-	wake_up(&server->request_q);
-}
-
-static void
-cifs_set_credits(struct TCP_Server_Info *server, const int val)
-{
-	spin_lock(&server->req_lock);
-	server->credits = val;
-	server->oplocks = val > 1 ? enable_oplocks : false;
-	spin_unlock(&server->req_lock);
-}
-
-static int *
-cifs_get_credits_field(struct TCP_Server_Info *server, const int optype)
-{
-	return &server->credits;
-}
-
-static unsigned int
-cifs_get_credits(struct mid_q_entry *mid)
-{
-	return 1;
-}
-
-/*
- * Find a free multiplex id (SMB mid). Otherwise there could be
- * mid collisions which might cause problems, demultiplexing the
- * wrong response to this request. Multiplex ids could collide if
- * one of a series requests takes much longer than the others, or
- * if a very large number of long lived requests (byte range
- * locks or FindNotify requests) are pending. No more than
- * 64K-1 requests can be outstanding at one time. If no
- * mids are available, return zero. A future optimization
- * could make the combination of mids and uid the key we use
- * to demultiplex on (rather than mid alone).
- * In addition to the above check, the cifs demultiplex
- * code already used the command code as a secondary
- * check of the frame and if signing is negotiated the
- * response would be discarded if the mid were the same
- * but the signature was wrong. Since the mid is not put in the
- * pending queue until later (when it is about to be dispatched)
- * we do have to limit the number of outstanding requests
- * to somewhat less than 64K-1 although it is hard to imagine
- * so many threads being in the vfs at one time.
- */
-static __u64
-cifs_get_next_mid(struct TCP_Server_Info *server)
-{
-	__u64 mid = 0;
-	__u16 last_mid, cur_mid;
-	bool collision, reconnect = false;
-
-	spin_lock(&server->mid_lock);
-
-	/* mid is 16 bit only for CIFS/SMB */
-	cur_mid = (__u16)((server->CurrentMid) & 0xffff);
-	/* we do not want to loop forever */
-	last_mid = cur_mid;
-	cur_mid++;
-	/* avoid 0xFFFF MID */
-	if (cur_mid == 0xffff)
-		cur_mid++;
-
-	/*
-	 * This nested loop looks more expensive than it is.
-	 * In practice the list of pending requests is short,
-	 * fewer than 50, and the mids are likely to be unique
-	 * on the first pass through the loop unless some request
-	 * takes longer than the 64 thousand requests before it
-	 * (and it would also have to have been a request that
-	 * did not time out).
-	 */
-	while (cur_mid != last_mid) {
-		struct mid_q_entry *mid_entry;
-		unsigned int num_mids;
-
-		collision = false;
-		if (cur_mid == 0)
-			cur_mid++;
-
-		num_mids = 0;
-		list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
-			++num_mids;
-			if (mid_entry->mid == cur_mid &&
-			    mid_entry->mid_state == MID_REQUEST_SUBMITTED) {
-				/* This mid is in use, try a different one */
-				collision = true;
-				break;
-			}
-		}
-
-		/*
-		 * if we have more than 32k mids in the list, then something
-		 * is very wrong. Possibly a local user is trying to DoS the
-		 * box by issuing long-running calls and SIGKILL'ing them. If
-		 * we get to 2^16 mids then we're in big trouble as this
-		 * function could loop forever.
-		 *
-		 * Go ahead and assign out the mid in this situation, but force
-		 * an eventual reconnect to clean out the pending_mid_q.
-		 */
-		if (num_mids > 32768)
-			reconnect = true;
-
-		if (!collision) {
-			mid = (__u64)cur_mid;
-			server->CurrentMid = mid;
-			break;
-		}
-		cur_mid++;
-	}
-	spin_unlock(&server->mid_lock);
-
-	if (reconnect) {
-		cifs_signal_cifsd_for_reconnect(server, false);
-	}
-
-	return mid;
-}
-
-/*
-	return codes:
-		0	not a transact2, or all data present
-		>0	transact2 with that much data missing
-		-EINVAL	invalid transact2
- */
-static int
-check2ndT2(char *buf)
-{
-	struct smb_hdr *pSMB = (struct smb_hdr *)buf;
-	struct smb_t2_rsp *pSMBt;
-	int remaining;
-	__u16 total_data_size, data_in_this_rsp;
-
-	if (pSMB->Command != SMB_COM_TRANSACTION2)
-		return 0;
-
-	/* check for plausible wct, bcc and t2 data and parm sizes */
-	/* check for parm and data offset going beyond end of smb */
-	if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
-		cifs_dbg(FYI, "Invalid transact2 word count\n");
-		return -EINVAL;
-	}
-
-	pSMBt = (struct smb_t2_rsp *)pSMB;
-
-	total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
-	data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
-
-	if (total_data_size == data_in_this_rsp)
-		return 0;
-	else if (total_data_size < data_in_this_rsp) {
-		cifs_dbg(FYI, "total data %d smaller than data in frame %d\n",
-			 total_data_size, data_in_this_rsp);
-		return -EINVAL;
-	}
-
-	remaining = total_data_size - data_in_this_rsp;
-
-	cifs_dbg(FYI, "missing %d bytes from transact2, check next response\n",
-		 remaining);
-	if (total_data_size > CIFSMaxBufSize) {
-		cifs_dbg(VFS, "TotalDataSize %d is over maximum buffer %d\n",
-			 total_data_size, CIFSMaxBufSize);
-		return -EINVAL;
-	}
-	return remaining;
-}
-
-static int
-coalesce_t2(char *second_buf, struct smb_hdr *target_hdr)
-{
-	struct smb_t2_rsp *pSMBs = (struct smb_t2_rsp *)second_buf;
-	struct smb_t2_rsp *pSMBt  = (struct smb_t2_rsp *)target_hdr;
-	char *data_area_of_tgt;
-	char *data_area_of_src;
-	int remaining;
-	unsigned int byte_count, total_in_tgt;
-	__u16 tgt_total_cnt, src_total_cnt, total_in_src;
-
-	src_total_cnt = get_unaligned_le16(&pSMBs->t2_rsp.TotalDataCount);
-	tgt_total_cnt = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
-
-	if (tgt_total_cnt != src_total_cnt)
-		cifs_dbg(FYI, "total data count of primary and secondary t2 differ source=%hu target=%hu\n",
-			 src_total_cnt, tgt_total_cnt);
-
-	total_in_tgt = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
-
-	remaining = tgt_total_cnt - total_in_tgt;
-
-	if (remaining < 0) {
-		cifs_dbg(FYI, "Server sent too much data. tgt_total_cnt=%hu total_in_tgt=%u\n",
-			 tgt_total_cnt, total_in_tgt);
-		return -EPROTO;
-	}
-
-	if (remaining == 0) {
-		/* nothing to do, ignore */
-		cifs_dbg(FYI, "no more data remains\n");
-		return 0;
-	}
-
-	total_in_src = get_unaligned_le16(&pSMBs->t2_rsp.DataCount);
-	if (remaining < total_in_src)
-		cifs_dbg(FYI, "transact2 2nd response contains too much data\n");
-
-	/* find end of first SMB data area */
-	data_area_of_tgt = (char *)&pSMBt->hdr.Protocol +
-				get_unaligned_le16(&pSMBt->t2_rsp.DataOffset);
-
-	/* validate target area */
-	data_area_of_src = (char *)&pSMBs->hdr.Protocol +
-				get_unaligned_le16(&pSMBs->t2_rsp.DataOffset);
-
-	data_area_of_tgt += total_in_tgt;
-
-	total_in_tgt += total_in_src;
-	/* is the result too big for the field? */
-	if (total_in_tgt > USHRT_MAX) {
-		cifs_dbg(FYI, "coalesced DataCount too large (%u)\n",
-			 total_in_tgt);
-		return -EPROTO;
-	}
-	put_unaligned_le16(total_in_tgt, &pSMBt->t2_rsp.DataCount);
-
-	/* fix up the BCC */
-	byte_count = get_bcc(target_hdr);
-	byte_count += total_in_src;
-	/* is the result too big for the field? */
-	if (byte_count > USHRT_MAX) {
-		cifs_dbg(FYI, "coalesced BCC too large (%u)\n", byte_count);
-		return -EPROTO;
-	}
-	put_bcc(byte_count, target_hdr);
-
-	byte_count = be32_to_cpu(target_hdr->smb_buf_length);
-	byte_count += total_in_src;
-	/* don't allow buffer to overflow */
-	if (byte_count > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
-		cifs_dbg(FYI, "coalesced BCC exceeds buffer size (%u)\n",
-			 byte_count);
-		return -ENOBUFS;
-	}
-	target_hdr->smb_buf_length = cpu_to_be32(byte_count);
-
-	/* copy second buffer into end of first buffer */
-	memcpy(data_area_of_tgt, data_area_of_src, total_in_src);
-
-	if (remaining != total_in_src) {
-		/* more responses to go */
-		cifs_dbg(FYI, "waiting for more secondary responses\n");
-		return 1;
-	}
-
-	/* we are done */
-	cifs_dbg(FYI, "found the last secondary response\n");
-	return 0;
-}
-
-static void
-cifs_downgrade_oplock(struct TCP_Server_Info *server,
-		      struct cifsInodeInfo *cinode, __u32 oplock,
-		      unsigned int epoch, bool *purge_cache)
-{
-	cifs_set_oplock_level(cinode, oplock);
-}
-
-static bool
-cifs_check_trans2(struct mid_q_entry *mid, struct TCP_Server_Info *server,
-		  char *buf, int malformed)
-{
-	if (malformed)
-		return false;
-	if (check2ndT2(buf) <= 0)
-		return false;
-	mid->multiRsp = true;
-	if (mid->resp_buf) {
-		/* merge response - fix up 1st*/
-		malformed = coalesce_t2(buf, mid->resp_buf);
-		if (malformed > 0)
-			return true;
-		/* All parts received or packet is malformed. */
-		mid->multiEnd = true;
-		dequeue_mid(mid, malformed);
-		return true;
-	}
-	if (!server->large_buf) {
-		/*FIXME: switch to already allocated largebuf?*/
-		cifs_dbg(VFS, "1st trans2 resp needs bigbuf\n");
-	} else {
-		/* Have first buffer */
-		mid->resp_buf = buf;
-		mid->large_buf = true;
-		server->bigbuf = NULL;
-	}
-	return true;
-}
-
-static bool
-cifs_need_neg(struct TCP_Server_Info *server)
-{
-	return server->maxBuf == 0;
-}
-
-static int
-cifs_negotiate(const unsigned int xid,
-	       struct cifs_ses *ses,
-	       struct TCP_Server_Info *server)
-{
-	int rc;
-	rc = CIFSSMBNegotiate(xid, ses, server);
-	if (rc == -EAGAIN) {
-		/* retry only once on 1st time connection */
-		set_credits(server, 1);
-		rc = CIFSSMBNegotiate(xid, ses, server);
-		if (rc == -EAGAIN)
-			rc = -EHOSTDOWN;
-	}
-	return rc;
-}
-
-static unsigned int
-cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
-{
-	__u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
-	struct TCP_Server_Info *server = tcon->ses->server;
-	unsigned int wsize;
-
-	/* start with specified wsize, or default */
-	if (ctx->wsize)
-		wsize = ctx->wsize;
-	else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
-		wsize = CIFS_DEFAULT_IOSIZE;
-	else
-		wsize = CIFS_DEFAULT_NON_POSIX_WSIZE;
-
-	/* can server support 24-bit write sizes? (via UNIX extensions) */
-	if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
-		wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE);
-
-	/*
-	 * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set?
-	 * Limit it to max buffer offered by the server, minus the size of the
-	 * WRITEX header, not including the 4 byte RFC1001 length.
-	 */
-	if (!(server->capabilities & CAP_LARGE_WRITE_X) ||
-	    (!(server->capabilities & CAP_UNIX) && server->sign))
-		wsize = min_t(unsigned int, wsize,
-				server->maxBuf - sizeof(WRITE_REQ) + 4);
-
-	/* hard limit of CIFS_MAX_WSIZE */
-	wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE);
-
-	return wsize;
-}
-
-static unsigned int
-cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
-{
-	__u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
-	struct TCP_Server_Info *server = tcon->ses->server;
-	unsigned int rsize, defsize;
-
-	/*
-	 * Set default value...
-	 *
-	 * HACK alert! Ancient servers have very small buffers. Even though
-	 * MS-CIFS indicates that servers are only limited by the client's
-	 * bufsize for reads, testing against win98se shows that it throws
-	 * INVALID_PARAMETER errors if you try to request too large a read.
-	 * OS/2 just sends back short reads.
-	 *
-	 * If the server doesn't advertise CAP_LARGE_READ_X, then assume that
-	 * it can't handle a read request larger than its MaxBufferSize either.
-	 */
-	if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP))
-		defsize = CIFS_DEFAULT_IOSIZE;
-	else if (server->capabilities & CAP_LARGE_READ_X)
-		defsize = CIFS_DEFAULT_NON_POSIX_RSIZE;
-	else
-		defsize = server->maxBuf - sizeof(READ_RSP);
-
-	rsize = ctx->rsize ? ctx->rsize : defsize;
-
-	/*
-	 * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to
-	 * the client's MaxBufferSize.
-	 */
-	if (!(server->capabilities & CAP_LARGE_READ_X))
-		rsize = min_t(unsigned int, CIFSMaxBufSize, rsize);
-
-	/* hard limit of CIFS_MAX_RSIZE */
-	rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE);
-
-	return rsize;
-}
-
-static void
-cifs_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
-	      struct cifs_sb_info *cifs_sb)
-{
-	CIFSSMBQFSDeviceInfo(xid, tcon);
-	CIFSSMBQFSAttributeInfo(xid, tcon);
-}
-
-static int
-cifs_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
-			struct cifs_sb_info *cifs_sb, const char *full_path)
-{
-	int rc;
-	FILE_ALL_INFO *file_info;
-
-	file_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
-	if (file_info == NULL)
-		return -ENOMEM;
-
-	rc = CIFSSMBQPathInfo(xid, tcon, full_path, file_info,
-			      0 /* not legacy */, cifs_sb->local_nls,
-			      cifs_remap(cifs_sb));
-
-	if (rc == -EOPNOTSUPP || rc == -EINVAL)
-		rc = SMBQueryInformation(xid, tcon, full_path, file_info,
-				cifs_sb->local_nls, cifs_remap(cifs_sb));
-	kfree(file_info);
-	return rc;
-}
-
-static int cifs_query_path_info(const unsigned int xid,
-				struct cifs_tcon *tcon,
-				struct cifs_sb_info *cifs_sb,
-				const char *full_path,
-				struct cifs_open_info_data *data)
-{
-	int rc;
-	FILE_ALL_INFO fi = {};
-
-	data->symlink = false;
-	data->adjust_tz = false;
-
-	/* could do find first instead but this returns more info */
-	rc = CIFSSMBQPathInfo(xid, tcon, full_path, &fi, 0 /* not legacy */, cifs_sb->local_nls,
-			      cifs_remap(cifs_sb));
-	/*
-	 * BB optimize code so we do not make the above call when server claims
-	 * no NT SMB support and the above call failed at least once - set flag
-	 * in tcon or mount.
-	 */
-	if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
-		rc = SMBQueryInformation(xid, tcon, full_path, &fi, cifs_sb->local_nls,
-					 cifs_remap(cifs_sb));
-		data->adjust_tz = true;
-	}
-
-	if (!rc) {
-		int tmprc;
-		int oplock = 0;
-		struct cifs_fid fid;
-		struct cifs_open_parms oparms;
-
-		move_cifs_info_to_smb2(&data->fi, &fi);
-
-		if (!(le32_to_cpu(fi.Attributes) & ATTR_REPARSE))
-			return 0;
-
-		oparms = (struct cifs_open_parms) {
-			.tcon = tcon,
-			.cifs_sb = cifs_sb,
-			.desired_access = FILE_READ_ATTRIBUTES,
-			.create_options = cifs_create_options(cifs_sb, 0),
-			.disposition = FILE_OPEN,
-			.path = full_path,
-			.fid = &fid,
-		};
-
-		/* Need to check if this is a symbolic link or not */
-		tmprc = CIFS_open(xid, &oparms, &oplock, NULL);
-		if (tmprc == -EOPNOTSUPP)
-			data->symlink = true;
-		else if (tmprc == 0)
-			CIFSSMBClose(xid, tcon, fid.netfid);
-	}
-
-	return rc;
-}
-
-static int cifs_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
-			     struct cifs_sb_info *cifs_sb, const char *full_path,
-			     u64 *uniqueid, struct cifs_open_info_data *unused)
-{
-	/*
-	 * We can not use the IndexNumber field by default from Windows or
-	 * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA
-	 * CIFS spec claims that this value is unique within the scope of a
-	 * share, and the windows docs hint that it's actually unique
-	 * per-machine.
-	 *
-	 * There may be higher info levels that work but are there Windows
-	 * server or network appliances for which IndexNumber field is not
-	 * guaranteed unique?
-	 */
-	return CIFSGetSrvInodeNumber(xid, tcon, full_path, uniqueid,
-				     cifs_sb->local_nls,
-				     cifs_remap(cifs_sb));
-}
-
-static int cifs_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
-				struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
-{
-	int rc;
-	FILE_ALL_INFO fi = {};
-
-	if (cfile->symlink_target) {
-		data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
-		if (!data->symlink_target)
-			return -ENOMEM;
-	}
-
-	rc = CIFSSMBQFileInfo(xid, tcon, cfile->fid.netfid, &fi);
-	if (!rc)
-		move_cifs_info_to_smb2(&data->fi, &fi);
-	return rc;
-}
-
-static void
-cifs_clear_stats(struct cifs_tcon *tcon)
-{
-	atomic_set(&tcon->stats.cifs_stats.num_writes, 0);
-	atomic_set(&tcon->stats.cifs_stats.num_reads, 0);
-	atomic_set(&tcon->stats.cifs_stats.num_flushes, 0);
-	atomic_set(&tcon->stats.cifs_stats.num_oplock_brks, 0);
-	atomic_set(&tcon->stats.cifs_stats.num_opens, 0);
-	atomic_set(&tcon->stats.cifs_stats.num_posixopens, 0);
-	atomic_set(&tcon->stats.cifs_stats.num_posixmkdirs, 0);
-	atomic_set(&tcon->stats.cifs_stats.num_closes, 0);
-	atomic_set(&tcon->stats.cifs_stats.num_deletes, 0);
-	atomic_set(&tcon->stats.cifs_stats.num_mkdirs, 0);
-	atomic_set(&tcon->stats.cifs_stats.num_rmdirs, 0);
-	atomic_set(&tcon->stats.cifs_stats.num_renames, 0);
-	atomic_set(&tcon->stats.cifs_stats.num_t2renames, 0);
-	atomic_set(&tcon->stats.cifs_stats.num_ffirst, 0);
-	atomic_set(&tcon->stats.cifs_stats.num_fnext, 0);
-	atomic_set(&tcon->stats.cifs_stats.num_fclose, 0);
-	atomic_set(&tcon->stats.cifs_stats.num_hardlinks, 0);
-	atomic_set(&tcon->stats.cifs_stats.num_symlinks, 0);
-	atomic_set(&tcon->stats.cifs_stats.num_locks, 0);
-	atomic_set(&tcon->stats.cifs_stats.num_acl_get, 0);
-	atomic_set(&tcon->stats.cifs_stats.num_acl_set, 0);
-}
-
-static void
-cifs_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
-{
-	seq_printf(m, " Oplocks breaks: %d",
-		   atomic_read(&tcon->stats.cifs_stats.num_oplock_brks));
-	seq_printf(m, "\nReads:  %d Bytes: %llu",
-		   atomic_read(&tcon->stats.cifs_stats.num_reads),
-		   (long long)(tcon->bytes_read));
-	seq_printf(m, "\nWrites: %d Bytes: %llu",
-		   atomic_read(&tcon->stats.cifs_stats.num_writes),
-		   (long long)(tcon->bytes_written));
-	seq_printf(m, "\nFlushes: %d",
-		   atomic_read(&tcon->stats.cifs_stats.num_flushes));
-	seq_printf(m, "\nLocks: %d HardLinks: %d Symlinks: %d",
-		   atomic_read(&tcon->stats.cifs_stats.num_locks),
-		   atomic_read(&tcon->stats.cifs_stats.num_hardlinks),
-		   atomic_read(&tcon->stats.cifs_stats.num_symlinks));
-	seq_printf(m, "\nOpens: %d Closes: %d Deletes: %d",
-		   atomic_read(&tcon->stats.cifs_stats.num_opens),
-		   atomic_read(&tcon->stats.cifs_stats.num_closes),
-		   atomic_read(&tcon->stats.cifs_stats.num_deletes));
-	seq_printf(m, "\nPosix Opens: %d Posix Mkdirs: %d",
-		   atomic_read(&tcon->stats.cifs_stats.num_posixopens),
-		   atomic_read(&tcon->stats.cifs_stats.num_posixmkdirs));
-	seq_printf(m, "\nMkdirs: %d Rmdirs: %d",
-		   atomic_read(&tcon->stats.cifs_stats.num_mkdirs),
-		   atomic_read(&tcon->stats.cifs_stats.num_rmdirs));
-	seq_printf(m, "\nRenames: %d T2 Renames %d",
-		   atomic_read(&tcon->stats.cifs_stats.num_renames),
-		   atomic_read(&tcon->stats.cifs_stats.num_t2renames));
-	seq_printf(m, "\nFindFirst: %d FNext %d FClose %d",
-		   atomic_read(&tcon->stats.cifs_stats.num_ffirst),
-		   atomic_read(&tcon->stats.cifs_stats.num_fnext),
-		   atomic_read(&tcon->stats.cifs_stats.num_fclose));
-}
-
-static void
-cifs_mkdir_setinfo(struct inode *inode, const char *full_path,
-		   struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
-		   const unsigned int xid)
-{
-	FILE_BASIC_INFO info;
-	struct cifsInodeInfo *cifsInode;
-	u32 dosattrs;
-	int rc;
-
-	memset(&info, 0, sizeof(info));
-	cifsInode = CIFS_I(inode);
-	dosattrs = cifsInode->cifsAttrs|ATTR_READONLY;
-	info.Attributes = cpu_to_le32(dosattrs);
-	rc = CIFSSMBSetPathInfo(xid, tcon, full_path, &info, cifs_sb->local_nls,
-				cifs_sb);
-	if (rc == 0)
-		cifsInode->cifsAttrs = dosattrs;
-}
-
-static int cifs_open_file(const unsigned int xid, struct cifs_open_parms *oparms, __u32 *oplock,
-			  void *buf)
-{
-	struct cifs_open_info_data *data = buf;
-	FILE_ALL_INFO fi = {};
-	int rc;
-
-	if (!(oparms->tcon->ses->capabilities & CAP_NT_SMBS))
-		rc = SMBLegacyOpen(xid, oparms->tcon, oparms->path,
-				   oparms->disposition,
-				   oparms->desired_access,
-				   oparms->create_options,
-				   &oparms->fid->netfid, oplock, &fi,
-				   oparms->cifs_sb->local_nls,
-				   cifs_remap(oparms->cifs_sb));
-	else
-		rc = CIFS_open(xid, oparms, oplock, &fi);
-
-	if (!rc && data)
-		move_cifs_info_to_smb2(&data->fi, &fi);
-
-	return rc;
-}
-
-static void
-cifs_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
-{
-	struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
-	cfile->fid.netfid = fid->netfid;
-	cifs_set_oplock_level(cinode, oplock);
-	cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
-}
-
-static int
-cifs_close_file(const unsigned int xid, struct cifs_tcon *tcon,
-		struct cifs_fid *fid)
-{
-	return CIFSSMBClose(xid, tcon, fid->netfid);
-}
-
-static int
-cifs_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
-		struct cifs_fid *fid)
-{
-	return CIFSSMBFlush(xid, tcon, fid->netfid);
-}
-
-static int
-cifs_sync_read(const unsigned int xid, struct cifs_fid *pfid,
-	       struct cifs_io_parms *parms, unsigned int *bytes_read,
-	       char **buf, int *buf_type)
-{
-	parms->netfid = pfid->netfid;
-	return CIFSSMBRead(xid, parms, bytes_read, buf, buf_type);
-}
-
-static int
-cifs_sync_write(const unsigned int xid, struct cifs_fid *pfid,
-		struct cifs_io_parms *parms, unsigned int *written,
-		struct kvec *iov, unsigned long nr_segs)
-{
-
-	parms->netfid = pfid->netfid;
-	return CIFSSMBWrite2(xid, parms, written, iov, nr_segs);
-}
-
-static int
-smb_set_file_info(struct inode *inode, const char *full_path,
-		  FILE_BASIC_INFO *buf, const unsigned int xid)
-{
-	int oplock = 0;
-	int rc;
-	__u32 netpid;
-	struct cifs_fid fid;
-	struct cifs_open_parms oparms;
-	struct cifsFileInfo *open_file;
-	struct cifsInodeInfo *cinode = CIFS_I(inode);
-	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
-	struct tcon_link *tlink = NULL;
-	struct cifs_tcon *tcon;
-
-	/* if the file is already open for write, just use that fileid */
-	open_file = find_writable_file(cinode, FIND_WR_FSUID_ONLY);
-	if (open_file) {
-		fid.netfid = open_file->fid.netfid;
-		netpid = open_file->pid;
-		tcon = tlink_tcon(open_file->tlink);
-		goto set_via_filehandle;
-	}
-
-	tlink = cifs_sb_tlink(cifs_sb);
-	if (IS_ERR(tlink)) {
-		rc = PTR_ERR(tlink);
-		tlink = NULL;
-		goto out;
-	}
-	tcon = tlink_tcon(tlink);
-
-	rc = CIFSSMBSetPathInfo(xid, tcon, full_path, buf, cifs_sb->local_nls,
-				cifs_sb);
-	if (rc == 0) {
-		cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
-		goto out;
-	} else if (rc != -EOPNOTSUPP && rc != -EINVAL) {
-		goto out;
-	}
-
-	oparms = (struct cifs_open_parms) {
-		.tcon = tcon,
-		.cifs_sb = cifs_sb,
-		.desired_access = SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
-		.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR),
-		.disposition = FILE_OPEN,
-		.path = full_path,
-		.fid = &fid,
-	};
-
-	cifs_dbg(FYI, "calling SetFileInfo since SetPathInfo for times not supported by this server\n");
-	rc = CIFS_open(xid, &oparms, &oplock, NULL);
-	if (rc != 0) {
-		if (rc == -EIO)
-			rc = -EINVAL;
-		goto out;
-	}
-
-	netpid = current->tgid;
-
-set_via_filehandle:
-	rc = CIFSSMBSetFileInfo(xid, tcon, buf, fid.netfid, netpid);
-	if (!rc)
-		cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
-
-	if (open_file == NULL)
-		CIFSSMBClose(xid, tcon, fid.netfid);
-	else
-		cifsFileInfo_put(open_file);
-out:
-	if (tlink != NULL)
-		cifs_put_tlink(tlink);
-	return rc;
-}
-
-static int
-cifs_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
-		   struct cifsFileInfo *cfile)
-{
-	return CIFSSMB_set_compression(xid, tcon, cfile->fid.netfid);
-}
-
-static int
-cifs_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
-		     const char *path, struct cifs_sb_info *cifs_sb,
-		     struct cifs_fid *fid, __u16 search_flags,
-		     struct cifs_search_info *srch_inf)
-{
-	int rc;
-
-	rc = CIFSFindFirst(xid, tcon, path, cifs_sb,
-			   &fid->netfid, search_flags, srch_inf, true);
-	if (rc)
-		cifs_dbg(FYI, "find first failed=%d\n", rc);
-	return rc;
-}
-
-static int
-cifs_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
-		    struct cifs_fid *fid, __u16 search_flags,
-		    struct cifs_search_info *srch_inf)
-{
-	return CIFSFindNext(xid, tcon, fid->netfid, search_flags, srch_inf);
-}
-
-static int
-cifs_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
-	       struct cifs_fid *fid)
-{
-	return CIFSFindClose(xid, tcon, fid->netfid);
-}
-
-static int
-cifs_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,
-		__u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)
-{
-	return CIFSSMBLock(0, tcon, net_fid, current->tgid, 0, 0, 0, 0,
-			   LOCKING_ANDX_OPLOCK_RELEASE, false, CIFS_CACHE_READ(cinode) ? 1 : 0);
-}
-
-static int
-cifs_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
-	     const char *path, struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
-{
-	int rc = -EOPNOTSUPP;
-
-	buf->f_type = CIFS_SUPER_MAGIC;
-
-	/*
-	 * We could add a second check for a QFS Unix capability bit
-	 */
-	if ((tcon->ses->capabilities & CAP_UNIX) &&
-	    (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
-		rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
-
-	/*
-	 * Only need to call the old QFSInfo if failed on newer one,
-	 * e.g. by OS/2.
-	 **/
-	if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
-		rc = CIFSSMBQFSInfo(xid, tcon, buf);
-
-	/*
-	 * Some old Windows servers also do not support level 103, retry with
-	 * older level one if old server failed the previous call or we
-	 * bypassed it because we detected that this was an older LANMAN sess
-	 */
-	if (rc)
-		rc = SMBOldQFSInfo(xid, tcon, buf);
-	return rc;
-}
-
-static int
-cifs_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
-	       __u64 length, __u32 type, int lock, int unlock, bool wait)
-{
-	return CIFSSMBLock(xid, tlink_tcon(cfile->tlink), cfile->fid.netfid,
-			   current->tgid, length, offset, unlock, lock,
-			   (__u8)type, wait, 0);
-}
-
-static int
-cifs_unix_dfs_readlink(const unsigned int xid, struct cifs_tcon *tcon,
-		       const unsigned char *searchName, char **symlinkinfo,
-		       const struct nls_table *nls_codepage)
-{
-#ifdef CONFIG_CIFS_DFS_UPCALL
-	int rc;
-	struct dfs_info3_param referral = {0};
-
-	rc = get_dfs_path(xid, tcon->ses, searchName, nls_codepage, &referral,
-			  0);
-
-	if (!rc) {
-		*symlinkinfo = kstrdup(referral.node_name, GFP_KERNEL);
-		free_dfs_info_param(&referral);
-		if (!*symlinkinfo)
-			rc = -ENOMEM;
-	}
-	return rc;
-#else /* No DFS support */
-	return -EREMOTE;
-#endif
-}
-
-static int cifs_query_symlink(const unsigned int xid,
-			      struct cifs_tcon *tcon,
-			      struct cifs_sb_info *cifs_sb,
-			      const char *full_path,
-			      char **target_path)
-{
-	int rc;
-
-	cifs_tcon_dbg(FYI, "%s: path=%s\n", __func__, full_path);
-
-	if (!cap_unix(tcon->ses))
-		return -EOPNOTSUPP;
-
-	rc = CIFSSMBUnixQuerySymLink(xid, tcon, full_path, target_path,
-				     cifs_sb->local_nls, cifs_remap(cifs_sb));
-	if (rc == -EREMOTE)
-		rc = cifs_unix_dfs_readlink(xid, tcon, full_path,
-					    target_path, cifs_sb->local_nls);
-	return rc;
-}
-
-static int cifs_parse_reparse_point(struct cifs_sb_info *cifs_sb,
-				    struct kvec *rsp_iov,
-				    struct cifs_open_info_data *data)
-{
-	struct reparse_data_buffer *buf;
-	TRANSACT_IOCTL_RSP *io = rsp_iov->iov_base;
-	bool unicode = !!(io->hdr.Flags2 & SMBFLG2_UNICODE);
-	u32 plen = le16_to_cpu(io->ByteCount);
-
-	buf = (struct reparse_data_buffer *)((__u8 *)&io->hdr.Protocol +
-					     le32_to_cpu(io->DataOffset));
-	return parse_reparse_point(buf, plen, cifs_sb, unicode, data);
-}
-
-static bool
-cifs_is_read_op(__u32 oplock)
-{
-	return oplock == OPLOCK_READ;
-}
-
-static unsigned int
-cifs_wp_retry_size(struct inode *inode)
-{
-	return CIFS_SB(inode->i_sb)->ctx->wsize;
-}
-
-static bool
-cifs_dir_needs_close(struct cifsFileInfo *cfile)
-{
-	return !cfile->srch_inf.endOfSearch && !cfile->invalidHandle;
-}
-
-static bool
-cifs_can_echo(struct TCP_Server_Info *server)
-{
-	if (server->tcpStatus == CifsGood)
-		return true;
-
-	return false;
-}
-
-static int
-cifs_make_node(unsigned int xid, struct inode *inode,
-	       struct dentry *dentry, struct cifs_tcon *tcon,
-	       const char *full_path, umode_t mode, dev_t dev)
-{
-	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
-	struct inode *newinode = NULL;
-	int rc;
-
-	if (tcon->unix_ext) {
-		/*
-		 * SMB1 Unix Extensions: requires server support but
-		 * works with all special files
-		 */
-		struct cifs_unix_set_info_args args = {
-			.mode	= mode & ~current_umask(),
-			.ctime	= NO_CHANGE_64,
-			.atime	= NO_CHANGE_64,
-			.mtime	= NO_CHANGE_64,
-			.device	= dev,
-		};
-		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
-			args.uid = current_fsuid();
-			args.gid = current_fsgid();
-		} else {
-			args.uid = INVALID_UID; /* no change */
-			args.gid = INVALID_GID; /* no change */
-		}
-		rc = CIFSSMBUnixSetPathInfo(xid, tcon, full