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, 650 deletions

diff --git a/fs/cifs/link.c b/fs/cifs/link.c
deleted file mode 100644
index c66be4904e1f..000000000000
--- a/fs/cifs/link.c
+++ /dev/null
@@ -1,650 +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/fs.h>
-#include <linux/stat.h>
-#include <linux/slab.h>
-#include <linux/namei.h>
-#include "cifsfs.h"
-#include "cifspdu.h"
-#include "cifsglob.h"
-#include "cifsproto.h"
-#include "cifs_debug.h"
-#include "cifs_fs_sb.h"
-#include "cifs_unicode.h"
-#include "smb2proto.h"
-#include "cifs_ioctl.h"
-
-/*
- * M-F Symlink Functions - Begin
- */
-
-#define CIFS_MF_SYMLINK_LEN_OFFSET (4+1)
-#define CIFS_MF_SYMLINK_MD5_OFFSET (CIFS_MF_SYMLINK_LEN_OFFSET+(4+1))
-#define CIFS_MF_SYMLINK_LINK_OFFSET (CIFS_MF_SYMLINK_MD5_OFFSET+(32+1))
-#define CIFS_MF_SYMLINK_LINK_MAXLEN (1024)
-#define CIFS_MF_SYMLINK_FILE_SIZE \
-	(CIFS_MF_SYMLINK_LINK_OFFSET + CIFS_MF_SYMLINK_LINK_MAXLEN)
-
-#define CIFS_MF_SYMLINK_LEN_FORMAT "XSym\n%04u\n"
-#define CIFS_MF_SYMLINK_MD5_FORMAT "%16phN\n"
-#define CIFS_MF_SYMLINK_MD5_ARGS(md5_hash) md5_hash
-
-static int
-symlink_hash(unsigned int link_len, const char *link_str, u8 *md5_hash)
-{
-	int rc;
-	struct shash_desc *md5 = NULL;
-
-	rc = cifs_alloc_hash("md5", &md5);
-	if (rc)
-		goto symlink_hash_err;
-
-	rc = crypto_shash_init(md5);
-	if (rc) {
-		cifs_dbg(VFS, "%s: Could not init md5 shash\n", __func__);
-		goto symlink_hash_err;
-	}
-	rc = crypto_shash_update(md5, link_str, link_len);
-	if (rc) {
-		cifs_dbg(VFS, "%s: Could not update with link_str\n", __func__);
-		goto symlink_hash_err;
-	}
-	rc = crypto_shash_final(md5, md5_hash);
-	if (rc)
-		cifs_dbg(VFS, "%s: Could not generate md5 hash\n", __func__);
-
-symlink_hash_err:
-	cifs_free_hash(&md5);
-	return rc;
-}
-
-static int
-parse_mf_symlink(const u8 *buf, unsigned int buf_len, unsigned int *_link_len,
-		 char **_link_str)
-{
-	int rc;
-	unsigned int link_len;
-	const char *md5_str1;
-	const char *link_str;
-	u8 md5_hash[16];
-	char md5_str2[34];
-
-	if (buf_len != CIFS_MF_SYMLINK_FILE_SIZE)
-		return -EINVAL;
-
-	md5_str1 = (const char *)&buf[CIFS_MF_SYMLINK_MD5_OFFSET];
-	link_str = (const char *)&buf[CIFS_MF_SYMLINK_LINK_OFFSET];
-
-	rc = sscanf(buf, CIFS_MF_SYMLINK_LEN_FORMAT, &link_len);
-	if (rc != 1)
-		return -EINVAL;
-
-	if (link_len > CIFS_MF_SYMLINK_LINK_MAXLEN)
-		return -EINVAL;
-
-	rc = symlink_hash(link_len, link_str, md5_hash);
-	if (rc) {
-		cifs_dbg(FYI, "%s: MD5 hash failure: %d\n", __func__, rc);
-		return rc;
-	}
-
-	scnprintf(md5_str2, sizeof(md5_str2),
-		  CIFS_MF_SYMLINK_MD5_FORMAT,
-		  CIFS_MF_SYMLINK_MD5_ARGS(md5_hash));
-
-	if (strncmp(md5_str1, md5_str2, 17) != 0)
-		return -EINVAL;
-
-	if (_link_str) {
-		*_link_str = kstrndup(link_str, link_len, GFP_KERNEL);
-		if (!*_link_str)
-			return -ENOMEM;
-	}
-
-	*_link_len = link_len;
-	return 0;
-}
-
-static int
-format_mf_symlink(u8 *buf, unsigned int buf_len, const char *link_str)
-{
-	int rc;
-	unsigned int link_len;
-	unsigned int ofs;
-	u8 md5_hash[16];
-
-	if (buf_len != CIFS_MF_SYMLINK_FILE_SIZE)
-		return -EINVAL;
-
-	link_len = strlen(link_str);
-
-	if (link_len > CIFS_MF_SYMLINK_LINK_MAXLEN)
-		return -ENAMETOOLONG;
-
-	rc = symlink_hash(link_len, link_str, md5_hash);
-	if (rc) {
-		cifs_dbg(FYI, "%s: MD5 hash failure: %d\n", __func__, rc);
-		return rc;
-	}
-
-	scnprintf(buf, buf_len,
-		  CIFS_MF_SYMLINK_LEN_FORMAT CIFS_MF_SYMLINK_MD5_FORMAT,
-		  link_len,
-		  CIFS_MF_SYMLINK_MD5_ARGS(md5_hash));
-
-	ofs = CIFS_MF_SYMLINK_LINK_OFFSET;
-	memcpy(buf + ofs, link_str, link_len);
-
-	ofs += link_len;
-	if (ofs < CIFS_MF_SYMLINK_FILE_SIZE) {
-		buf[ofs] = '\n';
-		ofs++;
-	}
-
-	while (ofs < CIFS_MF_SYMLINK_FILE_SIZE) {
-		buf[ofs] = ' ';
-		ofs++;
-	}
-
-	return 0;
-}
-
-bool
-couldbe_mf_symlink(const struct cifs_fattr *fattr)
-{
-	if (!S_ISREG(fattr->cf_mode))
-		/* it's not a symlink */
-		return false;
-
-	if (fattr->cf_eof != CIFS_MF_SYMLINK_FILE_SIZE)
-		/* it's not a symlink */
-		return false;
-
-	return true;
-}
-
-static int
-create_mf_symlink(const unsigned int xid, struct cifs_tcon *tcon,
-		  struct cifs_sb_info *cifs_sb, const char *fromName,
-		  const char *toName)
-{
-	int rc;
-	u8 *buf;
-	unsigned int bytes_written = 0;
-
-	buf = kmalloc(CIFS_MF_SYMLINK_FILE_SIZE, GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-
-	rc = format_mf_symlink(buf, CIFS_MF_SYMLINK_FILE_SIZE, toName);
-	if (rc)
-		goto out;
-
-	if (tcon->ses->server->ops->create_mf_symlink)
-		rc = tcon->ses->server->ops->create_mf_symlink(xid, tcon,
-					cifs_sb, fromName, buf, &bytes_written);
-	else
-		rc = -EOPNOTSUPP;
-
-	if (rc)
-		goto out;
-
-	if (bytes_written != CIFS_MF_SYMLINK_FILE_SIZE)
-		rc = -EIO;
-out:
-	kfree(buf);
-	return rc;
-}
-
-int
-check_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
-		 struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr,
-		 const unsigned char *path)
-{
-	int rc;
-	u8 *buf = NULL;
-	unsigned int link_len = 0;
-	unsigned int bytes_read = 0;
-	char *symlink = NULL;
-
-	if (!couldbe_mf_symlink(fattr))
-		/* it's not a symlink */
-		return 0;
-
-	buf = kmalloc(CIFS_MF_SYMLINK_FILE_SIZE, GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-
-	if (tcon->ses->server->ops->query_mf_symlink)
-		rc = tcon->ses->server->ops->query_mf_symlink(xid, tcon,
-					      cifs_sb, path, buf, &bytes_read);
-	else
-		rc = -ENOSYS;
-
-	if (rc)
-		goto out;
-
-	if (bytes_read == 0) /* not a symlink */
-		goto out;
-
-	rc = parse_mf_symlink(buf, bytes_read, &link_len, &symlink);
-	if (rc == -EINVAL) {
-		/* it's not a symlink */
-		rc = 0;
-		goto out;
-	}
-
-	if (rc != 0)
-		goto out;
-
-	/* it is a symlink */
-	fattr->cf_eof = link_len;
-	fattr->cf_mode &= ~S_IFMT;
-	fattr->cf_mode |= S_IFLNK | S_IRWXU | S_IRWXG | S_IRWXO;
-	fattr->cf_dtype = DT_LNK;
-	fattr->cf_symlink_target = symlink;
-out:
-	kfree(buf);
-	return rc;
-}
-
-#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
-/*
- * SMB 1.0 Protocol specific functions
- */
-
-int
-cifs_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
-		      struct cifs_sb_info *cifs_sb, const unsigned char *path,
-		      char *pbuf, unsigned int *pbytes_read)
-{
-	int rc;
-	int oplock = 0;
-	struct cifs_fid fid;
-	struct cifs_open_parms oparms;
-	struct cifs_io_parms io_parms = {0};
-	int buf_type = CIFS_NO_BUFFER;
-	FILE_ALL_INFO file_info;
-
-	oparms = (struct cifs_open_parms) {
-		.tcon = tcon,
-		.cifs_sb = cifs_sb,
-		.desired_access = GENERIC_READ,
-		.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR),
-		.disposition = FILE_OPEN,
-		.path = path,
-		.fid = &fid,
-	};
-
-	rc = CIFS_open(xid, &oparms, &oplock, &file_info);
-	if (rc)
-		return rc;
-
-	if (file_info.EndOfFile != cpu_to_le64(CIFS_MF_SYMLINK_FILE_SIZE)) {
-		rc = -ENOENT;
-		/* it's not a symlink */
-		goto out;
-	}
-
-	io_parms.netfid = fid.netfid;
-	io_parms.pid = current->tgid;
-	io_parms.tcon = tcon;
-	io_parms.offset = 0;
-	io_parms.length = CIFS_MF_SYMLINK_FILE_SIZE;
-
-	rc = CIFSSMBRead(xid, &io_parms, pbytes_read, &pbuf, &buf_type);
-out:
-	CIFSSMBClose(xid, tcon, fid.netfid);
-	return rc;
-}
-
-int
-cifs_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
-		       struct cifs_sb_info *cifs_sb, const unsigned char *path,
-		       char *pbuf, unsigned int *pbytes_written)
-{
-	int rc;
-	int oplock = 0;
-	struct cifs_fid fid;
-	struct cifs_open_parms oparms;
-	struct cifs_io_parms io_parms = {0};
-
-	oparms = (struct cifs_open_parms) {
-		.tcon = tcon,
-		.cifs_sb = cifs_sb,
-		.desired_access = GENERIC_WRITE,
-		.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR),
-		.disposition = FILE_CREATE,
-		.path = path,
-		.fid = &fid,
-	};
-
-	rc = CIFS_open(xid, &oparms, &oplock, NULL);
-	if (rc)
-		return rc;
-
-	io_parms.netfid = fid.netfid;
-	io_parms.pid = current->tgid;
-	io_parms.tcon = tcon;
-	io_parms.offset = 0;
-	io_parms.length = CIFS_MF_SYMLINK_FILE_SIZE;
-
-	rc = CIFSSMBWrite(xid, &io_parms, pbytes_written, pbuf);
-	CIFSSMBClose(xid, tcon, fid.netfid);
-	return rc;
-}
-#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
-
-/*
- * SMB 2.1/SMB3 Protocol specific functions
- */
-int
-smb3_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
-		      struct cifs_sb_info *cifs_sb, const unsigned char *path,
-		      char *pbuf, unsigned int *pbytes_read)
-{
-	int rc;
-	struct cifs_fid fid;
-	struct cifs_open_parms oparms;
-	struct cifs_io_parms io_parms = {0};
-	int buf_type = CIFS_NO_BUFFER;
-	__le16 *utf16_path;
-	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
-	struct smb2_file_all_info *pfile_info = NULL;
-
-	oparms = (struct cifs_open_parms) {
-		.tcon = tcon,
-		.cifs_sb = cifs_sb,
-		.path = path,
-		.desired_access = GENERIC_READ,
-		.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR),
-		.disposition = FILE_OPEN,
-		.fid = &fid,
-	};
-
-	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
-	if (utf16_path == NULL)
-		return -ENOMEM;
-
-	pfile_info = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
-			     GFP_KERNEL);
-
-	if (pfile_info == NULL) {
-		kfree(utf16_path);
-		return  -ENOMEM;
-	}
-
-	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, pfile_info, NULL,
-		       NULL, NULL);
-	if (rc)
-		goto qmf_out_open_fail;
-
-	if (pfile_info->EndOfFile != cpu_to_le64(CIFS_MF_SYMLINK_FILE_SIZE)) {
-		/* it's not a symlink */
-		rc = -ENOENT; /* Is there a better rc to return? */
-		goto qmf_out;
-	}
-
-	io_parms.netfid = fid.netfid;
-	io_parms.pid = current->tgid;
-	io_parms.tcon = tcon;
-	io_parms.offset = 0;
-	io_parms.length = CIFS_MF_SYMLINK_FILE_SIZE;
-	io_parms.persistent_fid = fid.persistent_fid;
-	io_parms.volatile_fid = fid.volatile_fid;
-	rc = SMB2_read(xid, &io_parms, pbytes_read, &pbuf, &buf_type);
-qmf_out:
-	SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
-qmf_out_open_fail:
-	kfree(utf16_path);
-	kfree(pfile_info);
-	return rc;
-}
-
-int
-smb3_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
-		       struct cifs_sb_info *cifs_sb, const unsigned char *path,
-		       char *pbuf, unsigned int *pbytes_written)
-{
-	int rc;
-	struct cifs_fid fid;
-	struct cifs_open_parms oparms;
-	struct cifs_io_parms io_parms = {0};
-	__le16 *utf16_path;
-	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
-	struct kvec iov[2];
-
-	cifs_dbg(FYI, "%s: path: %s\n", __func__, path);
-
-	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
-	if (!utf16_path)
-		return -ENOMEM;
-
-	oparms = (struct cifs_open_parms) {
-		.tcon = tcon,
-		.cifs_sb = cifs_sb,
-		.path = path,
-		.desired_access = GENERIC_WRITE,
-		.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR),
-		.disposition = FILE_CREATE,
-		.fid = &fid,
-		.mode = 0644,
-	};
-
-	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
-		       NULL, NULL);
-	if (rc) {
-		kfree(utf16_path);
-		return rc;
-	}
-
-	io_parms.netfid = fid.netfid;
-	io_parms.pid = current->tgid;
-	io_parms.tcon = tcon;
-	io_parms.offset = 0;
-	io_parms.length = CIFS_MF_SYMLINK_FILE_SIZE;
-	io_parms.persistent_fid = fid.persistent_fid;
-	io_parms.volatile_fid = fid.volatile_fid;
-
-	/* iov[0] is reserved for smb header */
-	iov[1].iov_base = pbuf;
-	iov[1].iov_len = CIFS_MF_SYMLINK_FILE_SIZE;
-
-	rc = SMB2_write(xid, &io_parms, pbytes_written, iov, 1);
-
-	/* Make sure we wrote all of the symlink data */
-	if ((rc == 0) && (*pbytes_written != CIFS_MF_SYMLINK_FILE_SIZE))
-		rc = -EIO;
-
-	SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
-
-	kfree(utf16_path);
-	return rc;
-}
-
-/*
- * M-F Symlink Functions - End
- */
-
-int
-cifs_hardlink(struct dentry *old_file, struct inode *inode,
-	      struct dentry *direntry)
-{
-	int rc = -EACCES;
-	unsigned int xid;
-	const char *from_name, *to_name;
-	void *page1, *page2;
-	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
-	struct tcon_link *tlink;
-	struct cifs_tcon *tcon;
-	struct TCP_Server_Info *server;
-	struct cifsInodeInfo *cifsInode;
-
-	if (unlikely(cifs_forced_shutdown(cifs_sb)))
-		return -EIO;
-
-	tlink = cifs_sb_tlink(cifs_sb);
-	if (IS_ERR(tlink))
-		return PTR_ERR(tlink);
-	tcon = tlink_tcon(tlink);
-
-	xid = get_xid();
-	page1 = alloc_dentry_path();
-	page2 = alloc_dentry_path();
-
-	from_name = build_path_from_dentry(old_file, page1);
-	if (IS_ERR(from_name)) {
-		rc = PTR_ERR(from_name);
-		goto cifs_hl_exit;
-	}
-	to_name = build_path_from_dentry(direntry, page2);
-	if (IS_ERR(to_name)) {
-		rc = PTR_ERR(to_name);
-		goto cifs_hl_exit;
-	}
-
-#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
-	if (tcon->unix_ext)
-		rc = CIFSUnixCreateHardLink(xid, tcon, from_name, to_name,
-					    cifs_sb->local_nls,
-					    cifs_remap(cifs_sb));
-	else {
-#else
-	{
-#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
-		server = tcon->ses->server;
-		if (!server->ops->create_hardlink) {
-			rc = -ENOSYS;
-			goto cifs_hl_exit;
-		}
-		rc = server->ops->create_hardlink(xid, tcon, from_name, to_name,
-						  cifs_sb);
-		if ((rc == -EIO) || (rc == -EINVAL))
-			rc = -EOPNOTSUPP;
-	}
-
-	d_drop(direntry);	/* force new lookup from server of target */
-
-	/*
-	 * if source file is cached (oplocked) revalidate will not go to server
-	 * until the file is closed or oplock broken so update nlinks locally
-	 */
-	if (d_really_is_positive(old_file)) {
-		cifsInode = CIFS_I(d_inode(old_file));
-		if (rc == 0) {
-			spin_lock(&d_inode(old_file)->i_lock);
-			inc_nlink(d_inode(old_file));
-			spin_unlock(&d_inode(old_file)->i_lock);
-
-			/*
-			 * parent dir timestamps will update from srv within a
-			 * second, would it really be worth it to set the parent
-			 * dir cifs inode time to zero to force revalidate
-			 * (faster) for it too?
-			 */
-		}
-		/*
-		 * if not oplocked will force revalidate to get info on source
-		 * file from srv.  Note Samba server prior to 4.2 has bug -
-		 * not updating src file ctime on hardlinks but Windows servers
-		 * handle it properly
-		 */
-		cifsInode->time = 0;
-
-		/*
-		 * Will update parent dir timestamps from srv within a second.
-		 * Would it really be worth it to set the parent dir (cifs
-		 * inode) time field to zero to force revalidate on parent
-		 * directory faster ie
-		 *
-		 * CIFS_I(inode)->time = 0;
-		 */
-	}
-
-cifs_hl_exit:
-	free_dentry_path(page1);
-	free_dentry_path(page2);
-	free_xid(xid);
-	cifs_put_tlink(tlink);
-	return rc;
-}
-
-int
-cifs_symlink(struct mnt_idmap *idmap, struct inode *inode,
-	     struct dentry *direntry, const char *symname)
-{
-	int rc = -EOPNOTSUPP;
-	unsigned int xid;
-	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
-	struct tcon_link *tlink;
-	struct cifs_tcon *pTcon;
-	const char *full_path;
-	void *page;
-	struct inode *newinode = NULL;
-
-	if (unlikely(cifs_forced_shutdown(cifs_sb)))
-		return -EIO;
-
-	page = alloc_dentry_path();
-	if (!page)
-		return -ENOMEM;
-
-	xid = get_xid();
-
-	tlink = cifs_sb_tlink(cifs_sb);
-	if (IS_ERR(tlink)) {
-		rc = PTR_ERR(tlink);
-		goto symlink_exit;
-	}
-	pTcon = tlink_tcon(tlink);
-
-	full_path = build_path_from_dentry(direntry, page);
-	if (IS_ERR(full_path)) {
-		rc = PTR_ERR(full_path);
-		goto symlink_exit;
-	}
-
-	cifs_dbg(FYI, "Full path: %s\n", full_path);
-	cifs_dbg(FYI, "symname is %s\n", symname);
-
-	/* BB what if DFS and this volume is on different share? BB */
-	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
-		rc = create_mf_symlink(xid, pTcon, cifs_sb, full_path, symname);
-#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
-	else if (pTcon->unix_ext)
-		rc = CIFSUnixCreateSymLink(xid, pTcon, full_path, symname,
-					   cifs_sb->local_nls,
-					   cifs_remap(cifs_sb));
-#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
-	/* else
-	   rc = CIFSCreateReparseSymLink(xid, pTcon, fromName, toName,
-					cifs_sb_target->local_nls); */
-
-	if (rc == 0) {
-		if (pTcon->posix_extensions)
-			rc = smb311_posix_get_inode_info(&newinode, full_path, inode->i_sb, xid);
-		else if (pTcon->unix_ext)
-			rc = cifs_get_inode_info_unix(&newinode, full_path,
-						      inode->i_sb, xid);
-		else
-			rc = cifs_get_inode_info(&newinode, full_path, NULL,
-						 inode->i_sb, xid, NULL);
-
-		if (rc != 0) {
-			cifs_dbg(FYI, "Create symlink ok, getinodeinfo fail rc = %d\n",
-				 rc);
-		} else {
-			d_instantiate(direntry, newinode);
-		}
-	}
-symlink_exit:
-	free_dentry_path(page);
-	cifs_put_tlink(tlink);
-	free_xid(xid);
-	return rc;
-}