1 files changed, 156 insertions, 65 deletions

diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 9434f6dd8df3..28c0be5e69b7 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -312,7 +312,7 @@ smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
 		if (server->tcpStatus != CifsNeedReconnect)
 			break;
 
-		if (--retries)
+		if (retries && --retries)
 			continue;
 
 		/*
@@ -350,9 +350,14 @@ smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
 	}
 
 	rc = cifs_negotiate_protocol(0, tcon->ses);
-	if (!rc && tcon->ses->need_reconnect)
+	if (!rc && tcon->ses->need_reconnect) {
 		rc = cifs_setup_session(0, tcon->ses, nls_codepage);
-
+		if ((rc == -EACCES) && !tcon->retry) {
+			rc = -EHOSTDOWN;
+			mutex_unlock(&tcon->ses->session_mutex);
+			goto failed;
+		}
+	}
 	if (rc || !tcon->need_reconnect) {
 		mutex_unlock(&tcon->ses->session_mutex);
 		goto out;
@@ -397,6 +402,7 @@ out:
 	case SMB2_SET_INFO:
 		rc = -EAGAIN;
 	}
+failed:
 	unload_nls(nls_codepage);
 	return rc;
 }
@@ -1933,6 +1939,16 @@ parse_query_id_ctxt(struct create_context *cc, struct smb2_file_all_info *buf)
 	buf->IndexNumber = pdisk_id->DiskFileId;
 }
 
+static void
+parse_posix_ctxt(struct create_context *cc, struct smb_posix_info *pposix_inf)
+{
+	/* struct smb_posix_info *ppinf = (struct smb_posix_info *)cc; */
+
+	/* TODO: Need to add parsing for the context and return */
+	printk_once(KERN_WARNING
+		    "SMB3 3.11 POSIX response context not completed yet\n");
+}
+
 void
 smb2_parse_contexts(struct TCP_Server_Info *server,
 		       struct smb2_create_rsp *rsp,
@@ -1944,6 +1960,9 @@ smb2_parse_contexts(struct TCP_Server_Info *server,
 	unsigned int next;
 	unsigned int remaining;
 	char *name;
+	const char smb3_create_tag_posix[] = {0x93, 0xAD, 0x25, 0x50, 0x9C,
+					0xB4, 0x11, 0xE7, 0xB4, 0x23, 0x83,
+					0xDE, 0x96, 0x8B, 0xCD, 0x7C};
 
 	*oplock = 0;
 	data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset);
@@ -1963,6 +1982,15 @@ smb2_parse_contexts(struct TCP_Server_Info *server,
 		else if (buf && (le16_to_cpu(cc->NameLength) == 4) &&
 		    strncmp(name, SMB2_CREATE_QUERY_ON_DISK_ID, 4) == 0)
 			parse_query_id_ctxt(cc, buf);
+		else if ((le16_to_cpu(cc->NameLength) == 16)) {
+			if (memcmp(name, smb3_create_tag_posix, 16) == 0)
+				parse_posix_ctxt(cc, NULL);
+		}
+		/* else {
+			cifs_dbg(FYI, "Context not matched with len %d\n",
+				le16_to_cpu(cc->NameLength));
+			cifs_dump_mem("Cctxt name: ", name, 4);
+		} */
 
 		next = le32_to_cpu(cc->Next);
 		if (!next)
@@ -2199,13 +2227,14 @@ create_sd_buf(umode_t mode, unsigned int *len)
 	struct cifs_ace *pace;
 	unsigned int sdlen, acelen;
 
-	*len = roundup(sizeof(struct crt_sd_ctxt) + sizeof(struct cifs_ace), 8);
+	*len = roundup(sizeof(struct crt_sd_ctxt) + sizeof(struct cifs_ace) * 2,
+			8);
 	buf = kzalloc(*len, GFP_KERNEL);
 	if (buf == NULL)
 		return buf;
 
 	sdlen = sizeof(struct smb3_sd) + sizeof(struct smb3_acl) +
-		 sizeof(struct cifs_ace);
+		 2 * sizeof(struct cifs_ace);
 
 	buf->ccontext.DataOffset = cpu_to_le16(offsetof
 					(struct crt_sd_ctxt, sd));
@@ -2232,8 +2261,12 @@ create_sd_buf(umode_t mode, unsigned int *len)
 	/* create one ACE to hold the mode embedded in reserved special SID */
 	pace = (struct cifs_ace *)(sizeof(struct crt_sd_ctxt) + (char *)buf);
 	acelen = setup_special_mode_ACE(pace, (__u64)mode);
+	/* and one more ACE to allow access for authenticated users */
+	pace = (struct cifs_ace *)(acelen + (sizeof(struct crt_sd_ctxt) +
+		(char *)buf));
+	acelen += setup_authusers_ACE(pace);
 	buf->acl.AclSize = cpu_to_le16(sizeof(struct cifs_acl) + acelen);
-	buf->acl.AceCount = cpu_to_le16(1);
+	buf->acl.AceCount = cpu_to_le16(2);
 	return buf;
 }
 
@@ -2738,6 +2771,7 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
 	atomic_inc(&tcon->num_remote_opens);
 	oparms->fid->persistent_fid = rsp->PersistentFileId;
 	oparms->fid->volatile_fid = rsp->VolatileFileId;
+	oparms->fid->access = oparms->desired_access;
 #ifdef CONFIG_CIFS_DEBUG2
 	oparms->fid->mid = le64_to_cpu(rsp->sync_hdr.MessageId);
 #endif /* CIFS_DEBUG2 */
@@ -3352,6 +3386,7 @@ SMB2_notify_init(const unsigned int xid, struct smb_rqst *rqst,
 
 	req->PersistentFileId = persistent_fid;
 	req->VolatileFileId = volatile_fid;
+	/* See note 354 of MS-SMB2, 64K max */
 	req->OutputBufferLength =
 		cpu_to_le32(SMB2_MAX_BUFFER_SIZE - MAX_SMB2_HDR_SIZE);
 	req->CompletionFilter = cpu_to_le32(completion_filter);
@@ -4018,6 +4053,9 @@ smb2_writev_callback(struct mid_q_entry *mid)
 				     wdata->cfile->fid.persistent_fid,
 				     tcon->tid, tcon->ses->Suid, wdata->offset,
 				     wdata->bytes, wdata->result);
+		if (wdata->result == -ENOSPC)
+			printk_once(KERN_WARNING "Out of space writing to %s\n",
+				    tcon->treeName);
 	} else
 		trace_smb3_write_done(0 /* no xid */,
 				      wdata->cfile->fid.persistent_fid,
@@ -4296,56 +4334,38 @@ num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size)
 /*
  * Readdir/FindFirst
  */
-int
-SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
-		     u64 persistent_fid, u64 volatile_fid, int index,
-		     struct cifs_search_info *srch_inf)
+int SMB2_query_directory_init(const unsigned int xid,
+			      struct cifs_tcon *tcon, struct smb_rqst *rqst,
+			      u64 persistent_fid, u64 volatile_fid,
+			      int index, int info_level)
 {
-	struct smb_rqst rqst;
+	struct TCP_Server_Info *server = tcon->ses->server;
 	struct smb2_query_directory_req *req;
-	struct smb2_query_directory_rsp *rsp = NULL;
-	struct kvec iov[2];
-	struct kvec rsp_iov;
-	int rc = 0;
-	int len;
-	int resp_buftype = CIFS_NO_BUFFER;
 	unsigned char *bufptr;
-	struct TCP_Server_Info *server;
-	struct cifs_ses *ses = tcon->ses;
 	__le16 asteriks = cpu_to_le16('*');
-	char *end_of_smb;
-	unsigned int output_size = CIFSMaxBufSize;
-	size_t info_buf_size;
-	int flags = 0;
+	unsigned int output_size = CIFSMaxBufSize -
+		MAX_SMB2_CREATE_RESPONSE_SIZE -
+		MAX_SMB2_CLOSE_RESPONSE_SIZE;
 	unsigned int total_len;
-
-	if (ses && (ses->server))
-		server = ses->server;
-	else
-		return -EIO;
+	struct kvec *iov = rqst->rq_iov;
+	int len, rc;
 
 	rc = smb2_plain_req_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req,
 			     &total_len);
 	if (rc)
 		return rc;
 
-	if (smb3_encryption_required(tcon))
-		flags |= CIFS_TRANSFORM_REQ;
-
-	switch (srch_inf->info_level) {
+	switch (info_level) {
 	case SMB_FIND_FILE_DIRECTORY_INFO:
 		req->FileInformationClass = FILE_DIRECTORY_INFORMATION;
-		info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
 		break;
 	case SMB_FIND_FILE_ID_FULL_DIR_INFO:
 		req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION;
-		info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
 		break;
 	default:
 		cifs_tcon_dbg(VFS, "info level %u isn't supported\n",
-			 srch_inf->info_level);
-		rc = -EINVAL;
-		goto qdir_exit;
+			info_level);
+		return -EINVAL;
 	}
 
 	req->FileIndex = cpu_to_le32(index);
@@ -4374,40 +4394,50 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
 	iov[1].iov_base = (char *)(req->Buffer);
 	iov[1].iov_len = len;
 
-	memset(&rqst, 0, sizeof(struct smb_rqst));
-	rqst.rq_iov = iov;
-	rqst.rq_nvec = 2;
-
 	trace_smb3_query_dir_enter(xid, persistent_fid, tcon->tid,
 			tcon->ses->Suid, index, output_size);
 
-	rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
-	cifs_small_buf_release(req);
-	rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
+	return 0;
+}
 
-	if (rc) {
-		if (rc == -ENODATA &&
-		    rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
-			trace_smb3_query_dir_done(xid, persistent_fid,
-				tcon->tid, tcon->ses->Suid, index, 0);
-			srch_inf->endOfSearch = true;
-			rc = 0;
-		} else {
-			trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
-				tcon->ses->Suid, index, 0, rc);
-			cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
-		}
-		goto qdir_exit;
+void SMB2_query_directory_free(struct smb_rqst *rqst)
+{
+	if (rqst && rqst->rq_iov) {
+		cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
+	}
+}
+
+int
+smb2_parse_query_directory(struct cifs_tcon *tcon,
+			   struct kvec *rsp_iov,
+			   int resp_buftype,
+			   struct cifs_search_info *srch_inf)
+{
+	struct smb2_query_directory_rsp *rsp;
+	size_t info_buf_size;
+	char *end_of_smb;
+	int rc;
+
+	rsp = (struct smb2_query_directory_rsp *)rsp_iov->iov_base;
+
+	switch (srch_inf->info_level) {
+	case SMB_FIND_FILE_DIRECTORY_INFO:
+		info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1;
+		break;
+	case SMB_FIND_FILE_ID_FULL_DIR_INFO:
+		info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
+		break;
+	default:
+		cifs_tcon_dbg(VFS, "info level %u isn't supported\n",
+			 srch_inf->info_level);
+		return -EINVAL;
 	}
 
 	rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
-			       le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
+			       le32_to_cpu(rsp->OutputBufferLength), rsp_iov,
 			       info_buf_size);
-	if (rc) {
-		trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
-			tcon->ses->Suid, index, 0, rc);
-		goto qdir_exit;
-	}
+	if (rc)
+		return rc;
 
 	srch_inf->unicode = true;
 
@@ -4420,7 +4450,7 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
 	srch_inf->ntwrk_buf_start = (char *)rsp;
 	srch_inf->srch_entries_start = srch_inf->last_entry =
 		(char *)rsp + le16_to_cpu(rsp->OutputBufferOffset);
-	end_of_smb = rsp_iov.iov_len + (char *)rsp;
+	end_of_smb = rsp_iov->iov_len + (char *)rsp;
 	srch_inf->entries_in_buffer =
 			num_entries(srch_inf->srch_entries_start, end_of_smb,
 				    &srch_inf->last_entry, info_buf_size);
@@ -4435,11 +4465,72 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
 	else
 		cifs_tcon_dbg(VFS, "illegal search buffer type\n");
 
+	return 0;
+}
+
+int
+SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
+		     u64 persistent_fid, u64 volatile_fid, int index,
+		     struct cifs_search_info *srch_inf)
+{
+	struct smb_rqst rqst;
+	struct kvec iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
+	struct smb2_query_directory_rsp *rsp = NULL;
+	int resp_buftype = CIFS_NO_BUFFER;
+	struct kvec rsp_iov;
+	int rc = 0;
+	struct cifs_ses *ses = tcon->ses;
+	int flags = 0;
+
+	if (!ses || !(ses->server))
+		return -EIO;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	memset(&rqst, 0, sizeof(struct smb_rqst));
+	memset(&iov, 0, sizeof(iov));
+	rqst.rq_iov = iov;
+	rqst.rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
+
+	rc = SMB2_query_directory_init(xid, tcon, &rqst, persistent_fid,
+				       volatile_fid, index,
+				       srch_inf->info_level);
+	if (rc)
+		goto qdir_exit;
+
+	rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
+	rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
+
+	if (rc) {
+		if (rc == -ENODATA &&
+		    rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
+			trace_smb3_query_dir_done(xid, persistent_fid,
+				tcon->tid, tcon->ses->Suid, index, 0);
+			srch_inf->endOfSearch = true;
+			rc = 0;
+		} else {
+			trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
+				tcon->ses->Suid, index, 0, rc);
+			cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
+		}
+		goto qdir_exit;
+	}
+
+	rc = smb2_parse_query_directory(tcon, &rsp_iov,	resp_buftype,
+					srch_inf);
+	if (rc) {
+		trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
+			tcon->ses->Suid, index, 0, rc);
+		goto qdir_exit;
+	}
+	resp_buftype = CIFS_NO_BUFFER;
+
 	trace_smb3_query_dir_done(xid, persistent_fid, tcon->tid,
 			tcon->ses->Suid, index, srch_inf->entries_in_buffer);
-	return rc;
 
 qdir_exit:
+	SMB2_query_directory_free(&rqst);
 	free_rsp_buf(resp_buftype, rsp);
 	return rc;
 }