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Commit 2f1afe25 authored by Shirish Pargaonkar's avatar Shirish Pargaonkar Committed by Steve French
Browse files

cifs: Use smb 2 - 3 and cifsacl mount options getacl functions 



Fill in smb2/3 query acl functions in ops structures and use them.

Signed-off-by: default avatarShirish Pargaonkar <shirishpargaonkar@gmail.com>
Reviewed-by: default avatarPavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: default avatarSteve French <smfrench@gmail.com>
parent 42c493c1

fs/cifs/smb2ops.c

+116 −0
Original line number Diff line number Diff line
@@ -1288,6 +1288,107 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon, 
	return rc;

}



static struct cifs_ntsd *

get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,

		const struct cifs_fid *cifsfid, u32 *pacllen)

{

	struct cifs_ntsd *pntsd = NULL;

	unsigned int xid;

	int rc = -EOPNOTSUPP;

	struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);



	if (IS_ERR(tlink))

		return ERR_CAST(tlink);



	xid = get_xid();

	cifs_dbg(FYI, "trying to get acl\n");



	rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,

			    cifsfid->volatile_fid, (void **)&pntsd, pacllen);

	free_xid(xid);



	cifs_put_tlink(tlink);



	cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);

	if (rc)

		return ERR_PTR(rc);

	return pntsd;



}



static struct cifs_ntsd *

get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,

		const char *path, u32 *pacllen)

{

	struct cifs_ntsd *pntsd = NULL;

	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;

	unsigned int xid;

	int rc;

	struct cifs_tcon *tcon;

	struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);

	struct cifs_fid fid;

	struct cifs_open_parms oparms;

	__le16 *utf16_path;



	cifs_dbg(FYI, "get smb3 acl for path %s\n", path);

	if (IS_ERR(tlink))

		return ERR_CAST(tlink);



	tcon = tlink_tcon(tlink);

	xid = get_xid();



	if (backup_cred(cifs_sb))

		oparms.create_options |= CREATE_OPEN_BACKUP_INTENT;

	else

		oparms.create_options = 0;



	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);

	if (!utf16_path)

		return ERR_PTR(-ENOMEM);



	oparms.tcon = tcon;

	oparms.desired_access = READ_CONTROL;

	oparms.disposition = FILE_OPEN;

	oparms.fid = &fid;

	oparms.reconnect = false;



	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);

	kfree(utf16_path);

	if (!rc) {

		rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,

			    fid.volatile_fid, (void **)&pntsd, pacllen);

		SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);

	}



	cifs_put_tlink(tlink);

	free_xid(xid);



	cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);

	if (rc)

		return ERR_PTR(rc);

	return pntsd;

}



/* Retrieve an ACL from the server */

static struct cifs_ntsd *

get_smb2_acl(struct cifs_sb_info *cifs_sb,

				      struct inode *inode, const char *path,

				      u32 *pacllen)

{

	struct cifs_ntsd *pntsd = NULL;

	struct cifsFileInfo *open_file = NULL;



	if (inode)

		open_file = find_readable_file(CIFS_I(inode), true);

	if (!open_file)

		return get_smb2_acl_by_path(cifs_sb, path, pacllen);



	pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);

	cifsFileInfo_put(open_file);

	return pntsd;

}





static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,

			    loff_t offset, loff_t len, bool keep_size)

{
@@ -2393,6 +2494,11 @@ struct smb_version_operations smb20_operations = { 
	.dir_needs_close = smb2_dir_needs_close,

	.get_dfs_refer = smb2_get_dfs_refer,

	.select_sectype = smb2_select_sectype,

#ifdef CONFIG_CIFS_ACL

	.get_acl = get_smb2_acl,

	.get_acl_by_fid = get_smb2_acl_by_fid,

/*	.set_acl = set_smb3_acl, */

#endif /* CIFS_ACL */

};



struct smb_version_operations smb21_operations = {
@@ -2477,6 +2583,11 @@ struct smb_version_operations smb21_operations = { 
	.enum_snapshots = smb3_enum_snapshots,

	.get_dfs_refer = smb2_get_dfs_refer,

	.select_sectype = smb2_select_sectype,

#ifdef CONFIG_CIFS_ACL

	.get_acl = get_smb2_acl,

	.get_acl_by_fid = get_smb2_acl_by_fid,

/*	.set_acl = set_smb3_acl, */

#endif /* CIFS_ACL */

};



struct smb_version_operations smb30_operations = {
@@ -2571,6 +2682,11 @@ struct smb_version_operations smb30_operations = { 
	.receive_transform = smb3_receive_transform,

	.get_dfs_refer = smb2_get_dfs_refer,

	.select_sectype = smb2_select_sectype,

#ifdef CONFIG_CIFS_ACL

	.get_acl = get_smb2_acl,

	.get_acl_by_fid = get_smb2_acl_by_fid,

/*	.set_acl = set_smb3_acl, */

#endif /* CIFS_ACL */

};



#ifdef CONFIG_CIFS_SMB311