/*
 * OS X and Netatalk interoperability VFS module for Samba-3.x
 *
 * Copyright (C) Ralph Boehme, 2013, 2014
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#include "includes.h"
#include "MacExtensions.h"
#include "smbd/smbd.h"
#include "system/filesys.h"
#include "lib/util/time.h"
#include "system/shmem.h"
#include "locking/proto.h"
#include "smbd/globals.h"
#include "messages.h"
#include "libcli/security/security.h"
#include "../libcli/smb/smb2_create_ctx.h"
#include "lib/util/tevent_ntstatus.h"
#include "lib/util/tevent_unix.h"
#include "lib/util/util_file.h"
#include "offload_token.h"
#include "string_replace.h"
#include "hash_inode.h"
#include "lib/adouble.h"
#include "lib/util_macstreams.h"
#include "source3/smbd/dir.h"

/*
 * Enhanced OS X and Netatalk compatibility
 * ========================================
 *
 * This modules takes advantage of vfs_streams_xattr and
 * vfs_catia. VFS modules vfs_fruit and vfs_streams_xattr must be
 * loaded in the correct order:
 *
 *   vfs modules = catia fruit streams_xattr
 *
 * The module intercepts the OS X special streams "AFP_AfpInfo" and
 * "AFP_Resource" and handles them in a special way. All other named
 * streams are deferred to vfs_streams_xattr.
 *
 * The OS X client maps all NTFS illegal characters to the Unicode
 * private range. This module optionally stores the characters using
 * their native ASCII encoding using vfs_catia. If you're not enabling
 * this feature, you can skip catia from vfs modules.
 *
 * Finally, open modes are optionally checked against Netatalk AFP
 * share modes.
 *
 * The "AFP_AfpInfo" named stream is a binary blob containing OS X
 * extended metadata for files and directories. This module optionally
 * reads and stores this metadata in a way compatible with Netatalk 3
 * which stores the metadata in an EA "org.netatalk.metadata". Cf
 * source3/include/MacExtensions.h for a description of the binary
 * blobs content.
 *
 * The "AFP_Resource" named stream may be arbitrarily large, thus it
 * can't be stored in an xattr on most filesystem. ZFS on Solaris is
 * the only available filesystem where xattrs can be of any size and
 * the OS supports using the file APIs for xattrs.
 *
 * The AFP_Resource stream is stored in an AppleDouble file prepending
 * "._" to the filename. On Solaris with ZFS the stream is optionally
 * stored in an EA "org.netatalk.resource".
 *
 *
 * Extended Attributes
 * ===================
 *
 * The OS X SMB client sends xattrs as ADS too. For xattr interop with
 * other protocols you may want to adjust the xattr names the VFS
 * module vfs_streams_xattr uses for storing ADS's. This defaults to
 * user.DosStream.ADS_NAME:$DATA and can be changed by specifying
 * these module parameters:
 *
 *   streams_xattr:prefix = user.
 *   streams_xattr:store_stream_type = false
 *
 *
 * TODO
 * ====
 *
 * - log diagnostic if any needed VFS module is not loaded
 *   (eg with lp_vfs_objects())
 * - add tests
 */

static int vfs_fruit_debug_level = DBGC_VFS;

static struct global_fruit_config {
	bool nego_aapl;	/* client negotiated AAPL */

} global_fruit_config;

#undef DBGC_CLASS
#define DBGC_CLASS vfs_fruit_debug_level

#define FRUIT_PARAM_TYPE_NAME "fruit"

enum apple_fork {APPLE_FORK_DATA, APPLE_FORK_RSRC};

enum fruit_rsrc {FRUIT_RSRC_STREAM, FRUIT_RSRC_ADFILE, FRUIT_RSRC_XATTR};
enum fruit_meta {FRUIT_META_STREAM, FRUIT_META_NETATALK};
enum fruit_locking {FRUIT_LOCKING_NETATALK, FRUIT_LOCKING_NONE};
enum fruit_encoding {FRUIT_ENC_NATIVE, FRUIT_ENC_PRIVATE};

struct fruit_config_data {
	enum fruit_rsrc rsrc;
	enum fruit_meta meta;
	enum fruit_locking locking;
	enum fruit_encoding encoding;
	bool use_aapl;		/* config from smb.conf */
	bool use_copyfile;
	bool readdir_attr_enabled;
	bool posix_opens;
	bool unix_info_enabled;
	bool copyfile_enabled;
	bool veto_appledouble;
	bool aapl_zero_file_id;
	const char *model;
	bool time_machine;
	off_t time_machine_max_size;
	bool convert_adouble;
	bool wipe_intentionally_left_blank_rfork;
	bool delete_empty_adfiles;
	bool validate_afpinfo;
	bool veto_localized;
	bool ignore_zero_aces;

	/*
	 * Additional options, all enabled by default,
	 * possibly useful for analyzing performance. The associated
	 * operations with each of them may be expensive, so having
	 * the chance to disable them individually gives a chance
	 * tweaking the setup for the particular usecase.
	 */
	bool readdir_attr_rsize;
	bool readdir_attr_finder_info;
	bool readdir_attr_max_access;
	/* Recursion guard. Will go away when we have STATX. */
	bool in_openat_pathref_fsp;
};

static const struct enum_list fruit_rsrc[] = {
	{FRUIT_RSRC_STREAM, "stream"}, /* pass on to vfs_streams_xattr */
	{FRUIT_RSRC_ADFILE, "file"}, /* ._ AppleDouble file */
	{FRUIT_RSRC_XATTR, "xattr"}, /* Netatalk compatible xattr (ZFS only) */
	{ -1, NULL}
};

static const struct enum_list fruit_meta[] = {
	{FRUIT_META_STREAM, "stream"}, /* pass on to vfs_streams_xattr */
	{FRUIT_META_NETATALK, "netatalk"}, /* Netatalk compatible xattr */
	{ -1, NULL}
};

static const struct enum_list fruit_locking[] = {
	{FRUIT_LOCKING_NETATALK, "netatalk"}, /* synchronize locks with Netatalk */
	{FRUIT_LOCKING_NONE, "none"},
	{ -1, NULL}
};

static const struct enum_list fruit_encoding[] = {
	{FRUIT_ENC_NATIVE, "native"}, /* map unicode private chars to ASCII */
	{FRUIT_ENC_PRIVATE, "private"}, /* keep unicode private chars */
	{ -1, NULL}
};

struct fio {
	vfs_handle_struct *handle;
	files_struct *fsp; /* backlink to itself */

	/* tcon config handle */
	struct fruit_config_data *config;

	/* Backend fsp for AppleDouble file, can be NULL */
	files_struct *ad_fsp;
	/* link from adouble_open_from_base_fsp() to fio */
	struct fio *real_fio;

	/* Denote stream type, meta or rsrc */
	adouble_type_t type;

	/*
	 * AFP_AfpInfo stream created, but not written yet, thus still a fake
	 * pipe fd. This is set to true in fruit_open_meta if there was no
	 * existing stream but the caller requested O_CREAT. It is later set to
	 * false when we get a write on the stream that then does open and
	 * create the stream.
	 */
	bool fake_fd;
	int flags;
	int mode;
};

/*****************************************************************************
 * Helper functions
 *****************************************************************************/

static struct adouble *ad_get_meta_fsp(TALLOC_CTX *ctx,
				       vfs_handle_struct *handle,
				       const struct smb_filename *smb_fname)
{
	NTSTATUS status;
	struct adouble *ad = NULL;
	struct smb_filename *smb_fname_cp = NULL;
	struct fruit_config_data *config = NULL;

	if (smb_fname->fsp != NULL) {
		return ad_get(ctx, handle, smb_fname, ADOUBLE_META);
	}

	SMB_VFS_HANDLE_GET_DATA(handle,
				config,
				struct fruit_config_data,
				return NULL);

	if (config->in_openat_pathref_fsp) {
		return NULL;
	}

	smb_fname_cp = cp_smb_filename_nostream(ctx, smb_fname);
	if (smb_fname_cp == NULL) {
		return NULL;
	}
	config->in_openat_pathref_fsp = true;
	status = openat_pathref_fsp(handle->conn->cwd_fsp,
				    smb_fname_cp);
	config->in_openat_pathref_fsp = false;
	if (!NT_STATUS_IS_OK(status)) {
		TALLOC_FREE(smb_fname_cp);
		return NULL;
	}

	ad = ad_get(ctx, handle, smb_fname_cp, ADOUBLE_META);
	TALLOC_FREE(smb_fname_cp);
	return ad;
}

static struct fio *fruit_get_complete_fio(vfs_handle_struct *handle,
					  files_struct *fsp)
{
	struct fio *fio = (struct fio *)VFS_FETCH_FSP_EXTENSION(handle, fsp);

	if (fio == NULL) {
		return NULL;
	}

	if (fio->real_fio != NULL) {
		/*
		 * This is an fsp from adouble_open_from_base_fsp()
		 * we should just pass this to the next
		 * module.
		 */
		return NULL;
	}

	return fio;
}

/**
 * Initialize config struct from our smb.conf config parameters
 **/
static int init_fruit_config(vfs_handle_struct *handle)
{
	struct fruit_config_data *config;
	int enumval = -1;
	const char *tm_size_str = NULL;

	config = talloc_zero(handle->conn, struct fruit_config_data);
	if (!config) {
		DEBUG(1, ("talloc_zero() failed\n"));
		errno = ENOMEM;
		return -1;
	}

	enumval = lp_parm_enum(SNUM(handle->conn), FRUIT_PARAM_TYPE_NAME,
			       "resource", fruit_rsrc, FRUIT_RSRC_ADFILE);
	if (enumval == -1) {
		DEBUG(1, ("value for %s: resource type unknown\n",
			  FRUIT_PARAM_TYPE_NAME));
		goto fail;
	}
	config->rsrc = (enum fruit_rsrc)enumval;

	enumval = lp_parm_enum(SNUM(handle->conn), FRUIT_PARAM_TYPE_NAME,
			       "metadata", fruit_meta, FRUIT_META_NETATALK);
	if (enumval == -1) {
		DEBUG(1, ("value for %s: metadata type unknown\n",
			  FRUIT_PARAM_TYPE_NAME));
		goto fail;
	}
	config->meta = (enum fruit_meta)enumval;

	enumval = lp_parm_enum(SNUM(handle->conn), FRUIT_PARAM_TYPE_NAME,
			       "locking", fruit_locking, FRUIT_LOCKING_NONE);
	if (enumval == -1) {
		DEBUG(1, ("value for %s: locking type unknown\n",
			  FRUIT_PARAM_TYPE_NAME));
		goto fail;
	}
	config->locking = (enum fruit_locking)enumval;

	enumval = lp_parm_enum(SNUM(handle->conn), FRUIT_PARAM_TYPE_NAME,
			       "encoding", fruit_encoding, FRUIT_ENC_PRIVATE);
	if (enumval == -1) {
		DEBUG(1, ("value for %s: encoding type unknown\n",
			  FRUIT_PARAM_TYPE_NAME));
		goto fail;
	}
	config->encoding = (enum fruit_encoding)enumval;

	if (config->rsrc == FRUIT_RSRC_ADFILE) {
		config->veto_appledouble = lp_parm_bool(SNUM(handle->conn),
							FRUIT_PARAM_TYPE_NAME,
							"veto_appledouble",
							true);
	}

	config->use_aapl = lp_parm_bool(
		-1, FRUIT_PARAM_TYPE_NAME, "aapl", true);

	config->time_machine = lp_parm_bool(
		SNUM(handle->conn), FRUIT_PARAM_TYPE_NAME, "time machine", false);

	config->unix_info_enabled = lp_parm_bool(
		-1, FRUIT_PARAM_TYPE_NAME, "nfs_aces", true);

	config->use_copyfile = lp_parm_bool(-1, FRUIT_PARAM_TYPE_NAME,
					   "copyfile", false);

	config->posix_opens = lp_parm_bool(
		SNUM(handle->conn), FRUIT_PARAM_TYPE_NAME, "posix_opens", true);

	config->ignore_zero_aces = lp_parm_bool(SNUM(handle->conn),
						FRUIT_PARAM_TYPE_NAME,
						"ignore_zero_aces",
						true);

	config->aapl_zero_file_id =
	    lp_parm_bool(SNUM(handle->conn), FRUIT_PARAM_TYPE_NAME,
			 "zero_file_id", true);

	config->readdir_attr_rsize = lp_parm_bool(
		SNUM(handle->conn), "readdir_attr", "aapl_rsize", true);

	config->readdir_attr_finder_info = lp_parm_bool(
		SNUM(handle->conn), "readdir_attr", "aapl_finder_info", true);

	config->readdir_attr_max_access = lp_parm_bool(
		SNUM(handle->conn), "readdir_attr", "aapl_max_access", true);

	config->model = lp_parm_const_string(
		-1, FRUIT_PARAM_TYPE_NAME, "model", "MacSamba");

	tm_size_str = lp_parm_const_string(
		SNUM(handle->conn), FRUIT_PARAM_TYPE_NAME,
		"time machine max size", NULL);
	if (tm_size_str != NULL) {
		config->time_machine_max_size = conv_str_size(tm_size_str);
	}

	config->convert_adouble = lp_parm_bool(
		SNUM(handle->conn), FRUIT_PARAM_TYPE_NAME,
		"convert_adouble", true);

	config->wipe_intentionally_left_blank_rfork = lp_parm_bool(
		SNUM(handle->conn), FRUIT_PARAM_TYPE_NAME,
		"wipe_intentionally_left_blank_rfork", false);

	config->delete_empty_adfiles = lp_parm_bool(
		SNUM(handle->conn), FRUIT_PARAM_TYPE_NAME,
		"delete_empty_adfiles", false);

	config->validate_afpinfo = lp_parm_bool(
		SNUM(handle->conn), FRUIT_PARAM_TYPE_NAME,
		"validate_afpinfo", true);

	config->veto_localized = lp_parm_bool(
		SNUM(handle->conn), FRUIT_PARAM_TYPE_NAME,
		"veto_localized", false);

	SMB_VFS_HANDLE_SET_DATA(handle, config,
				NULL, struct fruit_config_data,
				return -1);

	return 0;
fail:
	{
		int err = errno;
		TALLOC_FREE(config);
		errno = err;
	}
	return -1;
}

static bool add_fruit_stream(TALLOC_CTX *mem_ctx, unsigned int *num_streams,
			     struct stream_struct **streams,
			     const char *name, off_t size,
			     off_t alloc_size)
{
	struct stream_struct *tmp;

	tmp = talloc_realloc(mem_ctx, *streams, struct stream_struct,
			     (*num_streams)+1);
	if (tmp == NULL) {
		return false;
	}

	tmp[*num_streams].name = talloc_asprintf(tmp, "%s:$DATA", name);
	if (tmp[*num_streams].name == NULL) {
		return false;
	}

	tmp[*num_streams].size = size;
	tmp[*num_streams].alloc_size = alloc_size;

	*streams = tmp;
	*num_streams += 1;
	return true;
}

static void filter_empty_rsrc_stream(unsigned int *num_streams,
				     struct stream_struct **streams)
{
	unsigned int i;

	for (i = 0; i < *num_streams; i++) {
		struct stream_struct *s = &(*streams)[i];

		if (strequal_m(s->name, AFPRESOURCE_STREAM) &&
		    (s->size == 0)) {
			TALLOC_FREE(s->name);
			ARRAY_DEL_ELEMENT((*streams), i, *num_streams);
			*num_streams -= 1;
			return;
		}
	}
}

static bool del_fruit_stream(TALLOC_CTX *mem_ctx, unsigned int *num_streams,
			     struct stream_struct **streams,
			     const char *name)
{
	struct stream_struct *tmp = *streams;
	unsigned int i;

	if (*num_streams == 0) {
		return true;
	}

	for (i = 0; i < *num_streams; i++) {
		if (strequal_m(tmp[i].name, name)) {
			break;
		}
	}

	if (i == *num_streams) {
		return true;
	}

	TALLOC_FREE(tmp[i].name);
	ARRAY_DEL_ELEMENT(tmp, i, *num_streams);
	*num_streams -= 1;
	return true;
}

static bool ad_empty_finderinfo(const struct adouble *ad)
{
	char *fi = NULL;

	fi = ad_get_entry(ad, ADEID_FINDERI);
	if (fi == NULL) {
		DBG_ERR("Missing FinderInfo in struct adouble [%p]\n", ad);
		return false;
	}
	return all_zero((const uint8_t *)fi, ADEDLEN_FINDERI);
}

static bool ai_empty_finderinfo(const AfpInfo *ai)
{
	return all_zero(&ai->afpi_FinderInfo[0], ADEDLEN_FINDERI);
}

/**
 * Map an access mask to a Netatalk single byte byte range lock
 **/
static off_t access_to_netatalk_brl(enum apple_fork fork_type,
				    uint32_t access_mask)
{
	off_t offset;

	switch (access_mask) {
	case FILE_READ_DATA:
		offset = AD_FILELOCK_OPEN_RD;
		break;

	case FILE_WRITE_DATA:
	case FILE_APPEND_DATA:
		offset = AD_FILELOCK_OPEN_WR;
		break;

	default:
		offset = AD_FILELOCK_OPEN_NONE;
		break;
	}

	if (fork_type == APPLE_FORK_RSRC) {
		if (offset == AD_FILELOCK_OPEN_NONE) {
			offset = AD_FILELOCK_RSRC_OPEN_NONE;
		} else {
			offset += 2;
		}
	}

	return offset;
}

/**
 * Map a deny mode to a Netatalk brl
 **/
static off_t denymode_to_netatalk_brl(enum apple_fork fork_type,
				      uint32_t deny_mode)
{
	off_t offset = 0;

	switch (deny_mode) {
	case DENY_READ:
		offset = AD_FILELOCK_DENY_RD;
		break;

	case DENY_WRITE:
		offset = AD_FILELOCK_DENY_WR;
		break;

	default:
		smb_panic("denymode_to_netatalk_brl: bad deny mode\n");
	}

	if (fork_type == APPLE_FORK_RSRC) {
		offset += 2;
	}

	return offset;
}

/**
 * Call fcntl() with an exclusive F_GETLK request in order to
 * determine if there's an existing shared lock
 *
 * @return true if the requested lock was found or any error occurred
 *         false if the lock was not found
 **/
static bool test_netatalk_lock(files_struct *fsp, off_t in_offset)
{
	bool result;
	off_t offset = in_offset;
	off_t len = 1;
	int type = F_WRLCK;
	pid_t pid = 0;

	result = SMB_VFS_GETLOCK(fsp, &offset, &len, &type, &pid);
	if (result == false) {
		return true;
	}

	if (type != F_UNLCK) {
		return true;
	}

	return false;
}

struct check_access_state {
	NTSTATUS status;
	files_struct *fsp;
	uint32_t access_mask;
	uint32_t share_mode;
};

static void fruit_check_access(struct share_mode_lock *lck,
			       struct byte_range_lock *br_lck,
			       void *private_data)
{
	struct check_access_state *state = private_data;
	files_struct *fsp = state->fsp;
	uint32_t access_mask = state->access_mask;
	uint32_t share_mode = state->share_mode;
	NTSTATUS status = NT_STATUS_OK;
	off_t off;
	bool share_for_read = (share_mode & FILE_SHARE_READ);
	bool share_for_write = (share_mode & FILE_SHARE_WRITE);
	bool netatalk_already_open_for_reading = false;
	bool netatalk_already_open_for_writing = false;
	bool netatalk_already_open_with_deny_read = false;
	bool netatalk_already_open_with_deny_write = false;
	struct GUID req_guid = GUID_random();

	/* FIXME: hardcoded data fork, add resource fork */
	enum apple_fork fork_type = APPLE_FORK_DATA;

	/*
	 * The caller has checked fsp->fsp_flags.can_lock and lp_locking so
	 * br_lck has to be there!
	 */
	SMB_ASSERT(br_lck != NULL);

	state->status = NT_STATUS_OK;

	DBG_DEBUG("%s, am: %s/%s, sm: 0x%x\n",
		  fsp_str_dbg(fsp),
		  access_mask & FILE_READ_DATA ? "READ" :"-",
		  access_mask & FILE_WRITE_DATA ? "WRITE" : "-",
		  share_mode);

	if (fsp_get_io_fd(fsp) == -1) {
		return;
	}

	/* Read NetATalk opens and deny modes on the file. */
	netatalk_already_open_for_reading = test_netatalk_lock(fsp,
				access_to_netatalk_brl(fork_type,
					FILE_READ_DATA));

	netatalk_already_open_with_deny_read = test_netatalk_lock(fsp,
				denymode_to_netatalk_brl(fork_type,
					DENY_READ));

	netatalk_already_open_for_writing = test_netatalk_lock(fsp,
				access_to_netatalk_brl(fork_type,
					FILE_WRITE_DATA));

	netatalk_already_open_with_deny_write = test_netatalk_lock(fsp,
				denymode_to_netatalk_brl(fork_type,
					DENY_WRITE));

	/* If there are any conflicts - sharing violation. */
	if ((access_mask & FILE_READ_DATA) &&
			netatalk_already_open_with_deny_read) {
		state->status = NT_STATUS_SHARING_VIOLATION;
		return;
	}

	if (!share_for_read &&
			netatalk_already_open_for_reading) {
		state->status = NT_STATUS_SHARING_VIOLATION;
		return;
	}

	if ((access_mask & FILE_WRITE_DATA) &&
			netatalk_already_open_with_deny_write) {
		state->status = NT_STATUS_SHARING_VIOLATION;
		return;
	}

	if (!share_for_write &&
			netatalk_already_open_for_writing) {
		state->status = NT_STATUS_SHARING_VIOLATION;
		return;
	}

	if (!(access_mask & FILE_READ_DATA)) {
		/*
		 * Nothing we can do here, we need read access
		 * to set locks.
		 */
		return;
	}

	/* Set NetAtalk locks matching our access */
	if (access_mask & FILE_READ_DATA) {
		off = access_to_netatalk_brl(fork_type, FILE_READ_DATA);
		req_guid.time_hi_and_version = __LINE__;

		status = do_lock(
			br_lck,
			talloc_tos(),
			&req_guid,
			fsp->op->global->open_persistent_id,
			1,
			off,
			READ_LOCK,
			POSIX_LOCK,
			NULL,
			NULL);
		if (!NT_STATUS_IS_OK(status))  {
			state->status = status;
			return;
		}
	}

	if (!share_for_read) {
		off = denymode_to_netatalk_brl(fork_type, DENY_READ);
		req_guid.time_hi_and_version = __LINE__;

		status = do_lock(
			br_lck,
			talloc_tos(),
			&req_guid,
			fsp->op->global->open_persistent_id,
			1,
			off,
			READ_LOCK,
			POSIX_LOCK,
			NULL,
			NULL);
		if (!NT_STATUS_IS_OK(status)) {
			state->status = status;
			return;
		}
	}

	if (access_mask & FILE_WRITE_DATA) {
		off = access_to_netatalk_brl(fork_type, FILE_WRITE_DATA);
		req_guid.time_hi_and_version = __LINE__;

		status = do_lock(
			br_lck,
			talloc_tos(),
			&req_guid,
			fsp->op->global->open_persistent_id,
			1,
			off,
			READ_LOCK,
			POSIX_LOCK,
			NULL,
			NULL);
		if (!NT_STATUS_IS_OK(status)) {
			state->status = status;
			return;
		}
	}

	if (!share_for_write) {
		off = denymode_to_netatalk_brl(fork_type, DENY_WRITE);
		req_guid.time_hi_and_version = __LINE__;

		status = do_lock(
			br_lck,
			talloc_tos(),
			&req_guid,
			fsp->op->global->open_persistent_id,
			1,
			off,
			READ_LOCK,
			POSIX_LOCK,
			NULL,
			NULL);
		if (!NT_STATUS_IS_OK(status)) {
			state->status = status;
			return;
		}
	}
}

static NTSTATUS check_aapl(vfs_handle_struct *handle,
			   struct smb_request *req,
			   const struct smb2_create_blobs *in_context_blobs,
			   struct smb2_create_blobs *out_context_blobs)
{
	struct fruit_config_data *config;
	NTSTATUS status;
	struct smb2_create_blob *aapl = NULL;
	uint32_t cmd;
	bool ok;
	uint8_t p[16];
	DATA_BLOB blob = data_blob_talloc(req, NULL, 0);
	uint64_t req_bitmap, client_caps;
	uint64_t server_caps = SMB2_CRTCTX_AAPL_UNIX_BASED;
	smb_ucs2_t *model;
	size_t modellen;

	SMB_VFS_HANDLE_GET_DATA(handle, config, struct fruit_config_data,
				return NT_STATUS_UNSUCCESSFUL);

	if (!config->use_aapl
	    || in_context_blobs == NULL
	    || out_context_blobs == NULL) {
		return NT_STATUS_OK;
	}

	aapl = smb2_create_blob_find(in_context_blobs,
				     SMB2_CREATE_TAG_AAPL);
	if (aapl == NULL) {
		return NT_STATUS_OK;
	}

	if (aapl->data.length != 24) {
		DEBUG(1, ("unexpected AAPL ctxt length: %ju\n",
			  (uintmax_t)aapl->data.length));
		return NT_STATUS_INVALID_PARAMETER;
	}

	cmd = IVAL(aapl->data.data, 0);
	if (cmd != SMB2_CRTCTX_AAPL_SERVER_QUERY) {
		DEBUG(1, ("unsupported AAPL cmd: %d\n", cmd));
		return NT_STATUS_INVALID_PARAMETER;
	}

	req_bitmap = BVAL(aapl->data.data, 8);
	client_caps = BVAL(aapl->data.data, 16);

	SIVAL(p, 0, SMB2_CRTCTX_AAPL_SERVER_QUERY);
	SIVAL(p, 4, 0);
	SBVAL(p, 8, req_bitmap);
	ok = data_blob_append(req, &blob, p, 16);
	if (!ok) {
		return NT_STATUS_UNSUCCESSFUL;
	}

	if (req_bitmap & SMB2_CRTCTX_AAPL_SERVER_CAPS) {
		if ((client_caps & SMB2_CRTCTX_AAPL_SUPPORTS_READ_DIR_ATTR) &&
		    (handle->conn->fs_capabilities & FILE_NAMED_STREAMS)) {
			server_caps |= SMB2_CRTCTX_AAPL_SUPPORTS_READ_DIR_ATTR;
			config->readdir_attr_enabled = true;
		}

		if (config->use_copyfile) {
			server_caps |= SMB2_CRTCTX_AAPL_SUPPORTS_OSX_COPYFILE;
			config->copyfile_enabled = true;
		}

		/*
		 * The client doesn't set the flag, so we can't check
		 * for it and just set it unconditionally
		 */
		if (config->unix_info_enabled) {
			server_caps |= SMB2_CRTCTX_AAPL_SUPPORTS_NFS_ACE;
		}

		SBVAL(p, 0, server_caps);
		ok = data_blob_append(req, &blob, p, 8);
		if (!ok) {
			return NT_STATUS_UNSUCCESSFUL;
		}
	}

	if (req_bitmap & SMB2_CRTCTX_AAPL_VOLUME_CAPS) {
		int val = lp_case_sensitive(SNUM(handle->conn));
		uint64_t caps = 0;

		switch (val) {
		case Auto:
			break;

		case True:
			caps |= SMB2_CRTCTX_AAPL_CASE_SENSITIVE;
			break;

		default:
			break;
		}

		if (config->time_machine) {
			caps |= SMB2_CRTCTX_AAPL_FULL_SYNC;
		}

		SBVAL(p, 0, caps);

		ok = data_blob_append(req, &blob, p, 8);
		if (!ok) {
			return NT_STATUS_UNSUCCESSFUL;
		}
	}

	if (req_bitmap & SMB2_CRTCTX_AAPL_MODEL_INFO) {
		ok = convert_string_talloc(req,
					   CH_UNIX, CH_UTF16LE,
					   config->model, strlen(config->model),
					   &model, &modellen);
		if (!ok) {
			return NT_STATUS_UNSUCCESSFUL;
		}

		SIVAL(p, 0, 0);
		SIVAL(p + 4, 0, modellen);
		ok = data_blob_append(req, &blob, p, 8);
		if (!ok) {
			talloc_free(model);
			return NT_STATUS_UNSUCCESSFUL;
		}

		ok = data_blob_append(req, &blob, model, modellen);
		talloc_free(model);
		if (!ok) {
			return NT_STATUS_UNSUCCESSFUL;
		}
	}

	status = smb2_create_blob_add(out_context_blobs,
				      out_context_blobs,
				      SMB2_CREATE_TAG_AAPL,
				      blob);
	if (NT_STATUS_IS_OK(status)) {
		global_fruit_config.nego_aapl = true;
	}

	return status;
}

static bool readdir_attr_meta_finderi_stream(
	struct vfs_handle_struct *handle,
	const struct smb_filename *smb_fname,
	AfpInfo *ai)
{
	struct smb_filename *stream_name = NULL;
	files_struct *fsp = NULL;
	ssize_t nread;
	NTSTATUS status;
	bool ok;
	uint8_t buf[AFP_INFO_SIZE];

	status = synthetic_pathref(talloc_tos(),
				   handle->conn->cwd_fsp,
				   smb_fname->base_name,
				   AFPINFO_STREAM_NAME,
				   NULL,
				   smb_fname->twrp,
				   smb_fname->flags,
				   &stream_name);
	if (!NT_STATUS_IS_OK(status)) {
		return false;
	}

	status = SMB_VFS_CREATE_FILE(
		handle->conn,                           /* conn */
		NULL,                                   /* req */
		NULL,					/* dirfsp */
		stream_name,				/* fname */
		FILE_READ_DATA,                         /* access_mask */
		(FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
			FILE_SHARE_DELETE),
		FILE_OPEN,                              /* create_disposition*/
		0,                                      /* create_options */
		0,                                      /* file_attributes */
		INTERNAL_OPEN_ONLY,                     /* oplock_request */
		NULL,					/* lease */
                0,                                      /* allocation_size */
		0,                                      /* private_flags */
		NULL,                                   /* sd */
		NULL,                                   /* ea_list */
		&fsp,                                   /* result */
		NULL,                                   /* pinfo */
		NULL, NULL);				/* create context */

	TALLOC_FREE(stream_name);

	if (!NT_STATUS_IS_OK(status)) {
		return false;
	}

	nread = SMB_VFS_PREAD(fsp, buf, sizeof(buf), 0);
	if (nread != AFP_INFO_SIZE) {
		DBG_ERR("short read [%s] [%zd/%d]\n",
			smb_fname_str_dbg(stream_name), nread, AFP_INFO_SIZE);
		ok = false;
		goto fail;
	}

	memcpy(&ai->afpi_FinderInfo[0], &buf[AFP_OFF_FinderInfo],
	       AFP_FinderSize);

	ok = true;

fail:
	if (fsp != NULL) {
		close_file_free(NULL, &fsp, NORMAL_CLOSE);
	}

	return ok;
}

static bool readdir_attr_meta_finderi_netatalk(
	struct vfs_handle_struct *handle,
	const struct smb_filename *smb_fname,
	AfpInfo *ai)
{
	struct adouble *ad = NULL;
	char *p = NULL;

	ad = ad_get_meta_fsp(talloc_tos(), handle, smb_fname);
	if (ad == NULL) {
		return false;
	}

	p = ad_get_entry(ad, ADEID_FINDERI);
	if (p == NULL) {
		DBG_ERR("No ADEID_FINDERI for [%s]\n", smb_fname->base_name);
		TALLOC_FREE(ad);
		return false;
	}

	memcpy(&ai->afpi_FinderInfo[0], p, AFP_FinderSize);
	TALLOC_FREE(ad);
	return true;
}

static bool readdir_attr_meta_finderi(struct vfs_handle_struct *handle,
				      const struct smb_filename *smb_fname,
				      struct readdir_attr_data *attr_data)
{
	struct fruit_config_data *config = NULL;
	uint32_t date_added;
	AfpInfo ai = {0};
	bool ok;

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data,
				return false);

	switch (config->meta) {
	case FRUIT_META_NETATALK:
		ok = readdir_attr_meta_finderi_netatalk(
			handle, smb_fname, &ai);
		break;

	case FRUIT_META_STREAM:
		ok = readdir_attr_meta_finderi_stream(
			handle, smb_fname, &ai);
		break;

	default:
		DBG_ERR("Unexpected meta config [%d]\n", config->meta);
		return false;
	}

	if (!ok) {
		/* Don't bother with errors, it's likely ENOENT */
		return true;
	}

	if (S_ISREG(smb_fname->st.st_ex_mode)) {
		/* finder_type */
		memcpy(&attr_data->attr_data.aapl.finder_info[0],
		       &ai.afpi_FinderInfo[0], 4);

		/* finder_creator */
		memcpy(&attr_data->attr_data.aapl.finder_info[0] + 4,
		       &ai.afpi_FinderInfo[4], 4);
	}

	/* finder_flags */
	memcpy(&attr_data->attr_data.aapl.finder_info[0] + 8,
	       &ai.afpi_FinderInfo[8], 2);

	/* finder_ext_flags */
	memcpy(&attr_data->attr_data.aapl.finder_info[0] + 10,
	       &ai.afpi_FinderInfo[24], 2);

	/* creation date */
	date_added = convert_time_t_to_uint32_t(
		smb_fname->st.st_ex_btime.tv_sec - AD_DATE_DELTA);

	RSIVAL(&attr_data->attr_data.aapl.finder_info[0], 12, date_added);

	return true;
}

static uint64_t readdir_attr_rfork_size_adouble(
	struct vfs_handle_struct *handle,
	const struct smb_filename *smb_fname)
{
	struct adouble *ad = NULL;
	uint64_t rfork_size;

	ad = ad_get(talloc_tos(), handle, smb_fname,
		    ADOUBLE_RSRC);
	if (ad == NULL) {
		return 0;
	}

	rfork_size = ad_getentrylen(ad, ADEID_RFORK);
	TALLOC_FREE(ad);

	return rfork_size;
}

static uint64_t readdir_attr_rfork_size_stream(
	struct vfs_handle_struct *handle,
	const struct smb_filename *smb_fname)
{
	struct smb_filename *stream_name = NULL;
	int ret;
	uint64_t rfork_size;

	stream_name = synthetic_smb_fname(talloc_tos(),
					  smb_fname->base_name,
					  AFPRESOURCE_STREAM_NAME,
					  NULL,
					  smb_fname->twrp,
					  0);
	if (stream_name == NULL) {
		return 0;
	}

	ret = SMB_VFS_STAT(handle->conn, stream_name);
	if (ret != 0) {
		TALLOC_FREE(stream_name);
		return 0;
	}

	rfork_size = stream_name->st.st_ex_size;
	TALLOC_FREE(stream_name);

	return rfork_size;
}

static uint64_t readdir_attr_rfork_size(struct vfs_handle_struct *handle,
					const struct smb_filename *smb_fname)
{
	struct fruit_config_data *config = NULL;
	uint64_t rfork_size;

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data,
				return 0);

	switch (config->rsrc) {
	case FRUIT_RSRC_ADFILE:
		rfork_size = readdir_attr_rfork_size_adouble(handle,
							     smb_fname);
		break;

	case FRUIT_RSRC_XATTR:
	case FRUIT_RSRC_STREAM:
		rfork_size = readdir_attr_rfork_size_stream(handle,
							    smb_fname);
		break;

	default:
		DBG_ERR("Unexpected rsrc config [%d]\n", config->rsrc);
		rfork_size = 0;
		break;
	}

	return rfork_size;
}

static NTSTATUS readdir_attr_macmeta(struct vfs_handle_struct *handle,
				     const struct smb_filename *smb_fname,
				     struct readdir_attr_data *attr_data)
{
	NTSTATUS status = NT_STATUS_OK;
	struct fruit_config_data *config = NULL;
	bool ok;

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data,
				return NT_STATUS_UNSUCCESSFUL);


	/* Ensure we return a default value in the creation_date field */
	RSIVAL(&attr_data->attr_data.aapl.finder_info, 12, AD_DATE_START);

	/*
	 * Resource fork length
	 */

	if (config->readdir_attr_rsize) {
		uint64_t rfork_size;

		rfork_size = readdir_attr_rfork_size(handle, smb_fname);
		attr_data->attr_data.aapl.rfork_size = rfork_size;
	}

	/*
	 * FinderInfo
	 */

	if (config->readdir_attr_finder_info) {
		ok = readdir_attr_meta_finderi(handle, smb_fname, attr_data);
		if (!ok) {
			status = NT_STATUS_INTERNAL_ERROR;
		}
	}

	return status;
}

static NTSTATUS remove_virtual_nfs_aces(struct security_descriptor *psd)
{
	NTSTATUS status;
	uint32_t i;

	if (psd->dacl == NULL) {
		return NT_STATUS_OK;
	}

	for (i = 0; i < psd->dacl->num_aces; i++) {
		/* MS NFS style mode/uid/gid */
		int cmp = dom_sid_compare_domain(
				&global_sid_Unix_NFS,
				&psd->dacl->aces[i].trustee);
		if (cmp != 0) {
			/* Normal ACE entry. */
			continue;
		}

		/*
		 * security_descriptor_dacl_del()
		 * *must* return NT_STATUS_OK as we know
		 * we have something to remove.
		 */

		status = security_descriptor_dacl_del(psd,
				&psd->dacl->aces[i].trustee);
		if (!NT_STATUS_IS_OK(status)) {
			DBG_WARNING("failed to remove MS NFS style ACE: %s\n",
				nt_errstr(status));
			return status;
		}

		/*
		 * security_descriptor_dacl_del() may delete more
		 * then one entry subsequent to this one if the
		 * SID matches, but we only need to ensure that
		 * we stay looking at the same element in the array.
		 */
		i--;
	}
	return NT_STATUS_OK;
}

/* Search MS NFS style ACE with UNIX mode */
static NTSTATUS check_ms_nfs(vfs_handle_struct *handle,
			     files_struct *fsp,
			     struct security_descriptor *psd,
			     mode_t *pmode,
			     bool *pdo_chmod)
{
	uint32_t i;
	struct fruit_config_data *config = NULL;

	*pdo_chmod = false;

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data,
				return NT_STATUS_UNSUCCESSFUL);

	if (!global_fruit_config.nego_aapl) {
		return NT_STATUS_OK;
	}
	if (psd->dacl == NULL || !config->unix_info_enabled) {
		return NT_STATUS_OK;
	}

	for (i = 0; i < psd->dacl->num_aces; i++) {
		if (dom_sid_compare_domain(
			    &global_sid_Unix_NFS_Mode,
			    &psd->dacl->aces[i].trustee) == 0) {
			*pmode = (mode_t)psd->dacl->aces[i].trustee.sub_auths[2];
			*pmode &= (S_IRWXU | S_IRWXG | S_IRWXO);
			*pdo_chmod = true;

			DEBUG(10, ("MS NFS chmod request %s, %04o\n",
				   fsp_str_dbg(fsp), (unsigned)(*pmode)));
			break;
		}
	}

	/*
	 * Remove any incoming virtual ACE entries generated by
	 * fruit_fget_nt_acl().
	 */

	return remove_virtual_nfs_aces(psd);
}

/****************************************************************************
 * VFS ops
 ****************************************************************************/

static int fruit_connect(vfs_handle_struct *handle,
			 const char *service,
			 const char *user)
{
	int rc;
	char *list = NULL, *newlist = NULL;
	struct fruit_config_data *config;
	const struct loadparm_substitution *lp_sub =
		loadparm_s3_global_substitution();

	DEBUG(10, ("fruit_connect\n"));

	rc = SMB_VFS_NEXT_CONNECT(handle, service, user);
	if (rc < 0) {
		return rc;
	}

	rc = init_fruit_config(handle);
	if (rc != 0) {
		return rc;
	}

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data, return -1);

	if (config->veto_appledouble) {
		list = lp_veto_files(talloc_tos(), lp_sub, SNUM(handle->conn));

		if (list) {
			if (strstr(list, "/" ADOUBLE_NAME_PREFIX "*/") == NULL) {
				newlist = talloc_asprintf(
					list,
					"%s/" ADOUBLE_NAME_PREFIX "*/",
					list);
				lp_do_parameter(SNUM(handle->conn),
						"veto files",
						newlist);
			}
		} else {
			lp_do_parameter(SNUM(handle->conn),
					"veto files",
					"/" ADOUBLE_NAME_PREFIX "*/");
		}

		TALLOC_FREE(list);
	}

	if (config->veto_localized) {
		list = lp_veto_files(talloc_tos(), lp_sub, SNUM(handle->conn));

		if (list) {
			newlist = talloc_asprintf(
				list,
				"%s/.localized/",
				list);
			lp_do_parameter(SNUM(handle->conn),
					"veto files",
					newlist);
		} else {
			lp_do_parameter(SNUM(handle->conn),
					"veto files",
					"/.localized/");
		}

		TALLOC_FREE(list);
	}

	if (config->encoding == FRUIT_ENC_NATIVE) {
		lp_do_parameter(SNUM(handle->conn),
				"catia:mappings",
				macos_string_replace_map);
	}

	if (config->time_machine) {
		DBG_NOTICE("Enabling durable handles for Time Machine "
			   "support on [%s]\n", service);
		lp_do_parameter(SNUM(handle->conn), "durable handles", "yes");
		lp_do_parameter(SNUM(handle->conn), "kernel oplocks", "no");
		lp_do_parameter(SNUM(handle->conn), "kernel share modes", "no");
		if (!lp_strict_sync(SNUM(handle->conn))) {
			DBG_WARNING("Time Machine without strict sync is not "
				    "recommended!\n");
		}
		lp_do_parameter(SNUM(handle->conn), "posix locking", "no");
	}

	return rc;
}

static void fio_ref_destroy_fn(void *p_data)
{
	struct fio *ref_fio = (struct fio *)p_data;
	if (ref_fio->real_fio != NULL) {
		SMB_ASSERT(ref_fio->real_fio->ad_fsp == ref_fio->fsp);
		ref_fio->real_fio->ad_fsp = NULL;
		ref_fio->real_fio = NULL;
	}
}

static void fio_close_ad_fsp(struct fio *fio)
{
	if (fio->ad_fsp != NULL) {
		fd_close(fio->ad_fsp);
		file_free(NULL, fio->ad_fsp);
		/* fio_ref_destroy_fn() should have cleared this */
		SMB_ASSERT(fio->ad_fsp == NULL);
	}
}

static void fio_destroy_fn(void *p_data)
{
	struct fio *fio = (struct fio *)p_data;
	fio_close_ad_fsp(fio);
}

static int fruit_open_meta_stream(vfs_handle_struct *handle,
				  const struct files_struct *dirfsp,
				  const struct smb_filename *smb_fname,
				  files_struct *fsp,
				  int flags,
				  mode_t mode)
{
	struct fruit_config_data *config = NULL;
	struct fio *fio = NULL;
	struct vfs_open_how how = {
		.flags = flags & ~O_CREAT,
		.mode = mode,
	};
	int fd;

	DBG_DEBUG("Path [%s]\n", smb_fname_str_dbg(smb_fname));

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data, return -1);

	fio = VFS_ADD_FSP_EXTENSION(handle, fsp, struct fio, fio_destroy_fn);
	fio->handle = handle;
	fio->fsp = fsp;
	fio->type = ADOUBLE_META;
	fio->config = config;

	fd = SMB_VFS_NEXT_OPENAT(handle,
				 dirfsp,
				 smb_fname,
				 fsp,
				 &how);
	if (fd != -1) {
		return fd;
	}

	if (!(flags & O_CREAT)) {
		VFS_REMOVE_FSP_EXTENSION(handle, fsp);
		return -1;
	}

	fd = vfs_fake_fd();
	if (fd == -1) {
		VFS_REMOVE_FSP_EXTENSION(handle, fsp);
		return -1;
	}

	fio->fake_fd = true;
	fio->flags = flags;
	fio->mode = mode;

	return fd;
}

static int fruit_open_meta_netatalk(vfs_handle_struct *handle,
				    const struct files_struct *dirfsp,
				    const struct smb_filename *smb_fname,
				    files_struct *fsp,
				    int flags,
				    mode_t mode)
{
	struct fruit_config_data *config = NULL;
	struct fio *fio = NULL;
	struct adouble *ad = NULL;
	bool meta_exists = false;
	int fd;

	DBG_DEBUG("Path [%s]\n", smb_fname_str_dbg(smb_fname));

	/*
	 * We know this is a stream open, so fsp->base_fsp must
	 * already be open.
	 */
	SMB_ASSERT(fsp_is_alternate_stream(fsp));
	SMB_ASSERT(fsp->base_fsp->fsp_name->fsp == fsp->base_fsp);

	ad = ad_get(talloc_tos(), handle, fsp->base_fsp->fsp_name, ADOUBLE_META);
	if (ad != NULL) {
		meta_exists = true;
	}

	TALLOC_FREE(ad);

	if (!meta_exists && !(flags & O_CREAT)) {
		errno = ENOENT;
		return -1;
	}

	fd = vfs_fake_fd();
	if (fd == -1) {
		return -1;
	}

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data, return -1);

	fio = VFS_ADD_FSP_EXTENSION(handle, fsp, struct fio, fio_destroy_fn);
	fio->handle = handle;
	fio->fsp = fsp;
	fio->type = ADOUBLE_META;
	fio->config = config;
	fio->fake_fd = true;
	fio->flags = flags;
	fio->mode = mode;

	return fd;
}

static int fruit_open_meta(vfs_handle_struct *handle,
			   const struct files_struct *dirfsp,
			   const struct smb_filename *smb_fname,
			   files_struct *fsp, int flags, mode_t mode)
{
	int fd;
	struct fruit_config_data *config = NULL;

	DBG_DEBUG("path [%s]\n", smb_fname_str_dbg(smb_fname));

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data, return -1);

	switch (config->meta) {
	case FRUIT_META_STREAM:
		fd = fruit_open_meta_stream(handle, dirfsp, smb_fname,
					    fsp, flags, mode);
		break;

	case FRUIT_META_NETATALK:
		fd = fruit_open_meta_netatalk(handle, dirfsp, smb_fname,
					      fsp, flags, mode);
		break;

	default:
		DBG_ERR("Unexpected meta config [%d]\n", config->meta);
		return -1;
	}

	DBG_DEBUG("path [%s] fd [%d]\n", smb_fname_str_dbg(smb_fname), fd);

	return fd;
}

static int fruit_open_rsrc_adouble(vfs_handle_struct *handle,
				   const struct files_struct *dirfsp,
				   const struct smb_filename *smb_fname,
				   files_struct *fsp,
				   int flags,
				   mode_t mode)
{
	int rc = 0;
	struct fruit_config_data *config = NULL;
	struct files_struct *ad_fsp = NULL;
	struct fio *fio = NULL;
	struct fio *ref_fio = NULL;
	NTSTATUS status;
	int fd = -1;

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data, return -1);

	if ((!(flags & O_CREAT)) &&
	    S_ISDIR(fsp->base_fsp->fsp_name->st.st_ex_mode))
	{
		/* sorry, but directories don't have a resource fork */
		errno = ENOENT;
		rc = -1;
		goto exit;
	}

	/*
	 * We return a fake_fd to the vfs modules above,
	 * while we open an internal backend fsp for the
	 * '._' file for the next vfs modules.
	 *
	 * Note that adouble_open_from_base_fsp() recurses
	 * into fruit_openat(), but it'll just pass to
	 * the next module as just opens a flat file on
	 * disk.
	 */

	fd = vfs_fake_fd();
	if (fd == -1) {
		rc = fd;
		goto exit;
	}

	status = adouble_open_from_base_fsp(fsp->conn->cwd_fsp,
					    fsp->base_fsp,
					    ADOUBLE_RSRC,
					    flags,
					    mode,
					    &ad_fsp);
	if (!NT_STATUS_IS_OK(status)) {
		errno = map_errno_from_nt_status(status);
		rc = -1;
		goto exit;
	}

	/*
	 * Now we need to glue both handles together,
	 * so that they automatically detach each other
	 * on close.
	 */
	fio = fruit_get_complete_fio(handle, fsp);
	if (fio == NULL) {
		DBG_ERR("fio=NULL for [%s]\n", fsp_str_dbg(fsp));
		errno = EBADF;
		rc = -1;
		goto exit;
	}

	ref_fio = VFS_ADD_FSP_EXTENSION(handle, ad_fsp,
					struct fio,
					fio_ref_destroy_fn);
	if (ref_fio == NULL) {
		int saved_errno = errno;
		fd_close(ad_fsp);
		file_free(NULL, ad_fsp);
		ad_fsp = NULL;
		errno = saved_errno;
		rc = -1;
		goto exit;
	}

	SMB_ASSERT(ref_fio->fsp == NULL);
	ref_fio->handle = handle;
	ref_fio->fsp = ad_fsp;
	ref_fio->type = ADOUBLE_RSRC;
	ref_fio->config = config;
	ref_fio->real_fio = fio;
	SMB_ASSERT(fio->ad_fsp == NULL);
	fio->ad_fsp = ad_fsp;
	fio->fake_fd = true;

exit:

	DEBUG(10, ("fruit_open resource fork: rc=%d\n", rc));
	if (rc != 0) {
		int saved_errno = errno;
		if (fd != -1) {
			vfs_fake_fd_close(fd);
		}
		errno = saved_errno;
		return rc;
	}
	return fd;
}

static int fruit_open_rsrc_xattr(vfs_handle_struct *handle,
				 const struct files_struct *dirfsp,
				 const struct smb_filename *smb_fname,
				 files_struct *fsp,
				 int flags,
				 mode_t mode)
{
#ifdef HAVE_ATTROPEN
	int fd = -1;

	/*
	 * As there's no attropenat() this is only going to work with AT_FDCWD.
	 */
	SMB_ASSERT(fsp_get_pathref_fd(dirfsp) == AT_FDCWD);

	fd = attropen(smb_fname->base_name,
		      AFPRESOURCE_EA_NETATALK,
		      flags,
		      mode);
	if (fd == -1) {
		return -1;
	}

	return fd;

#else
	errno = ENOSYS;
	return -1;
#endif
}

static int fruit_open_rsrc(vfs_handle_struct *handle,
			   const struct files_struct *dirfsp,
			   const struct smb_filename *smb_fname,
			   files_struct *fsp, int flags, mode_t mode)
{
	int fd;
	struct fruit_config_data *config = NULL;
	struct fio *fio = NULL;

	DBG_DEBUG("Path [%s]\n", smb_fname_str_dbg(smb_fname));

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data, return -1);

	fio = VFS_ADD_FSP_EXTENSION(handle, fsp, struct fio, fio_destroy_fn);
	fio->handle = handle;
	fio->fsp = fsp;
	fio->type = ADOUBLE_RSRC;
	fio->config = config;

	switch (config->rsrc) {
	case FRUIT_RSRC_STREAM: {
		struct vfs_open_how how = {
			.flags = flags, .mode = mode,
		};
		fd = SMB_VFS_NEXT_OPENAT(handle,
					 dirfsp,
					 smb_fname,
					 fsp,
					 &how);
		break;
	}

	case FRUIT_RSRC_ADFILE:
		fd = fruit_open_rsrc_adouble(handle, dirfsp, smb_fname,
					     fsp, flags, mode);
		break;

	case FRUIT_RSRC_XATTR:
		fd = fruit_open_rsrc_xattr(handle, dirfsp, smb_fname,
					   fsp, flags, mode);
		break;

	default:
		DBG_ERR("Unexpected rsrc config [%d]\n", config->rsrc);
		errno = EINVAL;
		return -1;
	}

	DBG_DEBUG("Path [%s] fd [%d]\n", smb_fname_str_dbg(smb_fname), fd);

	if (fd == -1) {
		return -1;
	}

	return fd;
}

static int fruit_openat(vfs_handle_struct *handle,
			const struct files_struct *dirfsp,
			const struct smb_filename *smb_fname,
			files_struct *fsp,
			const struct vfs_open_how *how)
{
	struct fruit_config_data *config = NULL;
	int fd;

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data, return -1);

	DBG_DEBUG("Path [%s]\n", smb_fname_str_dbg(smb_fname));

	if (!is_named_stream(smb_fname)) {
		fd = SMB_VFS_NEXT_OPENAT(handle,
					 dirfsp,
					 smb_fname,
					 fsp,
					 how);
		if (fd == -1) {
			return -1;
		}
		if (config->posix_opens && global_fruit_config.nego_aapl) {
			fsp->fsp_flags.posix_open = true;
		}
		return fd;
	}

	if ((how->resolve & ~(VFS_OPEN_HOW_WITH_BACKUP_INTENT |
			      VFS_OPEN_HOW_RESOLVE_NO_XDEV)) != 0)
	{
		errno = ENOSYS;
		return -1;
	}

	SMB_ASSERT(fsp_is_alternate_stream(fsp));

	if (is_afpinfo_stream(smb_fname->stream_name)) {
		fd = fruit_open_meta(handle,
				     dirfsp,
				     smb_fname,
				     fsp,
				     how->flags,
				     how->mode);
	} else if (is_afpresource_stream(smb_fname->stream_name)) {
		fd = fruit_open_rsrc(handle,
				     dirfsp,
				     smb_fname,
				     fsp,
				     how->flags,
				     how->mode);
	} else {
		fd = SMB_VFS_NEXT_OPENAT(handle,
					 dirfsp,
					 smb_fname,
					 fsp,
					 how);
	}

	DBG_DEBUG("Path [%s] fd [%d]\n", smb_fname_str_dbg(smb_fname), fd);

	/* Prevent reopen optimisation */
	if (fd == -1) {
		return -1;
	}
	fsp->fsp_flags.have_proc_fds = false;
	if (config->posix_opens && global_fruit_config.nego_aapl) {
		fsp->fsp_flags.posix_open = true;
	}
	return fd;
}

static int fruit_close_meta(vfs_handle_struct *handle,
			    files_struct *fsp)
{
	int ret;
	struct fruit_config_data *config = NULL;

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data, return -1);

	switch (config->meta) {
	case FRUIT_META_STREAM:
	{
		struct fio *fio = fruit_get_complete_fio(handle, fsp);
		if (fio == NULL) {
			return -1;
		}
		if (fio->fake_fd) {
			ret = vfs_fake_fd_close(fsp_get_pathref_fd(fsp));
			fsp_set_fd(fsp, -1);
		} else {
			ret = SMB_VFS_NEXT_CLOSE(handle, fsp);
		}
		break;
	}
	case FRUIT_META_NETATALK:
		ret = vfs_fake_fd_close(fsp_get_pathref_fd(fsp));
		fsp_set_fd(fsp, -1);
		break;

	default:
		DBG_ERR("Unexpected meta config [%d]\n", config->meta);
		return -1;
	}

	return ret;
}


static int fruit_close_rsrc(vfs_handle_struct *handle,
			    files_struct *fsp)
{
	int ret;
	struct fruit_config_data *config = NULL;

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data, return -1);

	switch (config->rsrc) {
	case FRUIT_RSRC_STREAM:
		ret = SMB_VFS_NEXT_CLOSE(handle, fsp);
		break;

	case FRUIT_RSRC_ADFILE:
	{
		struct fio *fio = fruit_get_complete_fio(handle, fsp);
		if (fio == NULL) {
			return -1;
		}
		fio_close_ad_fsp(fio);
		ret = vfs_fake_fd_close(fsp_get_pathref_fd(fsp));
		fsp_set_fd(fsp, -1);
		break;
	}

	case FRUIT_RSRC_XATTR:
		ret = vfs_fake_fd_close(fsp_get_pathref_fd(fsp));
		fsp_set_fd(fsp, -1);
		break;

	default:
		DBG_ERR("Unexpected rsrc config [%d]\n", config->rsrc);
		return -1;
	}

	return ret;
}

static int fruit_close(vfs_handle_struct *handle,
                       files_struct *fsp)
{
	int ret;
	int fd;

	fd = fsp_get_pathref_fd(fsp);

	DBG_DEBUG("Path [%s] fd [%d]\n", smb_fname_str_dbg(fsp->fsp_name), fd);

	if (!fsp_is_alternate_stream(fsp)) {
		return SMB_VFS_NEXT_CLOSE(handle, fsp);
	}

	if (is_afpinfo_stream(fsp->fsp_name->stream_name)) {
		ret = fruit_close_meta(handle, fsp);
	} else if (is_afpresource_stream(fsp->fsp_name->stream_name)) {
		ret = fruit_close_rsrc(handle, fsp);
	} else {
		ret = SMB_VFS_NEXT_CLOSE(handle, fsp);
	}

	return ret;
}

static int fruit_renameat(struct vfs_handle_struct *handle,
			  files_struct *src_dirfsp,
			  const struct smb_filename *smb_fname_src,
			  files_struct *dst_dirfsp,
			  const struct smb_filename *smb_fname_dst,
			  const struct vfs_rename_how *how)
{
	int rc = -1;
	struct fruit_config_data *config = NULL;
	struct smb_filename *src_adp_smb_fname = NULL;
	struct smb_filename *dst_adp_smb_fname = NULL;

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data, return -1);

	if (!VALID_STAT(smb_fname_src->st)) {
		DBG_ERR("Need valid stat for [%s]\n",
			smb_fname_str_dbg(smb_fname_src));
		return -1;
	}

	rc = SMB_VFS_NEXT_RENAMEAT(handle,
				   src_dirfsp,
				   smb_fname_src,
				   dst_dirfsp,
				   smb_fname_dst,
				   how);
	if (rc != 0) {
		return -1;
	}

	if ((config->rsrc != FRUIT_RSRC_ADFILE) ||
	    (!S_ISREG(smb_fname_src->st.st_ex_mode)))
	{
		return 0;
	}

	rc = adouble_path(talloc_tos(), smb_fname_src, &src_adp_smb_fname);
	if (rc != 0) {
		goto done;
	}

	rc = adouble_path(talloc_tos(), smb_fname_dst, &dst_adp_smb_fname);
	if (rc != 0) {
		goto done;
	}

	DBG_DEBUG("%s -> %s\n",
		  smb_fname_str_dbg(src_adp_smb_fname),
		  smb_fname_str_dbg(dst_adp_smb_fname));

	rc = SMB_VFS_NEXT_RENAMEAT(handle,
				   src_dirfsp,
				   src_adp_smb_fname,
				   dst_dirfsp,
				   dst_adp_smb_fname,
				   how);
	if (errno == ENOENT) {
		rc = 0;
	}

done:
	TALLOC_FREE(src_adp_smb_fname);
	TALLOC_FREE(dst_adp_smb_fname);
	return rc;
}

static int fruit_unlink_meta_stream(vfs_handle_struct *handle,
				struct files_struct *dirfsp,
				const struct smb_filename *smb_fname)
{
	return SMB_VFS_NEXT_UNLINKAT(handle,
				dirfsp,
				smb_fname,
				0);
}

static int fruit_unlink_meta_netatalk(vfs_handle_struct *handle,
				      struct files_struct *dirfsp,
				      const struct smb_filename *smb_fname)
{
	struct smb_filename *base_name = NULL;
	struct files_struct *base_fsp = NULL;
	int ret = -1;

	if (smb_fname->fsp == NULL) {
		NTSTATUS status;

		base_name = cp_smb_filename_nostream(talloc_tos(), smb_fname);
		if (base_name == NULL) {
			errno = ENOMEM;
			goto done;
		}

		status = openat_pathref_fsp(dirfsp, base_name);
		if (!NT_STATUS_IS_OK(status)) {
			errno = map_errno_from_nt_status(status);
			goto done;
		}
		base_fsp = base_name->fsp;
	} else {
		SMB_ASSERT(fsp_is_alternate_stream(smb_fname->fsp));
		base_fsp = smb_fname->fsp->base_fsp;
	}

	ret = SMB_VFS_FREMOVEXATTR(base_fsp, AFPINFO_EA_NETATALK);
done:
	{
		int err = errno;
		TALLOC_FREE(base_name);
		errno = err;
	}
	return ret;
}

static int fruit_unlink_meta(vfs_handle_struct *handle,
			struct files_struct *dirfsp,
			const struct smb_filename *smb_fname)
{
	struct fruit_config_data *config = NULL;
	int rc;

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data, return -1);

	switch (config->meta) {
	case FRUIT_META_STREAM:
		rc = fruit_unlink_meta_stream(handle,
				dirfsp,
				smb_fname);
		break;

	case FRUIT_META_NETATALK:
		rc = fruit_unlink_meta_netatalk(handle, dirfsp, smb_fname);
		break;

	default:
		DBG_ERR("Unsupported meta config [%d]\n", config->meta);
		return -1;
	}

	return rc;
}

static int fruit_unlink_rsrc_stream(vfs_handle_struct *handle,
				struct files_struct *dirfsp,
				const struct smb_filename *smb_fname,
				bool force_unlink)
{
	int ret;

	if (!force_unlink) {
		struct stat_ex st = {};

		/*
		 * 0 byte resource fork streams are not listed by
		 * vfs_streaminfo, as a result stream cleanup/deletion of file
		 * deletion doesn't remove the resourcefork stream.
		 */

		ret = SMB_VFS_NEXT_FSTATAT(
			handle, dirfsp, smb_fname, &st, AT_SYMLINK_NOFOLLOW);
		if (ret != 0) {
			DBG_ERR("fstatat [%s%s] failed [%s]\n",
				fsp_str_dbg(dirfsp),
				smb_fname->base_name,
				strerror(errno));
			return -1;
		}

		if (st.st_ex_size > 0) {
			/* OS X ignores resource fork stream delete requests */
			return 0;
		}
	}

	ret = SMB_VFS_NEXT_UNLINKAT(handle,
			dirfsp,
			smb_fname,
			0);
	if ((ret != 0) && (errno == ENOENT) && force_unlink) {
		ret = 0;
	}

	return ret;
}

static int fruit_unlink_rsrc_adouble(vfs_handle_struct *handle,
				struct files_struct *dirfsp,
				const struct smb_filename *smb_fname,
				bool force_unlink)
{
	int rc;
	struct adouble *ad = NULL;
	struct smb_filename *adp_smb_fname = NULL;

	if (!force_unlink) {
		struct smb_filename *full_fname = NULL;

		full_fname = full_path_from_dirfsp_atname(talloc_tos(),
							  dirfsp,
							  smb_fname);
		if (full_fname == NULL) {
			return -1;
		}

		ad = ad_get(talloc_tos(), handle, full_fname,
			    ADOUBLE_RSRC);
		TALLOC_FREE(full_fname);
		if (ad == NULL) {
			errno = ENOENT;
			return -1;
		}


		/*
		 * 0 byte resource fork streams are not listed by
		 * vfs_streaminfo, as a result stream cleanup/deletion of file
		 * deletion doesn't remove the resourcefork stream.
		 */

		if (ad_getentrylen(ad, ADEID_RFORK) > 0) {
			/* OS X ignores resource fork stream delete requests */
			TALLOC_FREE(ad);
			return 0;
		}

		TALLOC_FREE(ad);
	}

	rc = adouble_path(talloc_tos(), smb_fname, &adp_smb_fname);
	if (rc != 0) {
		return -1;
	}

	rc = SMB_VFS_NEXT_UNLINKAT(handle,
			dirfsp,
			adp_smb_fname,
			0);
	TALLOC_FREE(adp_smb_fname);
	if ((rc != 0) && (errno == ENOENT || errno == ENAMETOOLONG) && force_unlink) {
		rc = 0;
	}

	return rc;
}

static int fruit_unlink_rsrc_xattr(vfs_handle_struct *handle,
				   const struct smb_filename *smb_fname,
				   bool force_unlink)
{
	/*
	 * OS X ignores resource fork stream delete requests, so nothing to do
	 * here. Removing the file will remove the xattr anyway, so we don't
	 * have to take care of removing 0 byte resource forks that could be
	 * left behind.
	 */
	return 0;
}

static int fruit_unlink_rsrc(vfs_handle_struct *handle,
			struct files_struct *dirfsp,
			const struct smb_filename *smb_fname,
			bool force_unlink)
{
	struct fruit_config_data *config = NULL;
	int rc;

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data, return -1);

	switch (config->rsrc) {
	case FRUIT_RSRC_STREAM:
		rc = fruit_unlink_rsrc_stream(handle,
				dirfsp,
				smb_fname,
				force_unlink);
		break;

	case FRUIT_RSRC_ADFILE:
		rc = fruit_unlink_rsrc_adouble(handle,
				dirfsp,
				smb_fname,
				force_unlink);
		break;

	case FRUIT_RSRC_XATTR:
		rc = fruit_unlink_rsrc_xattr(handle, smb_fname, force_unlink);
		break;

	default:
		DBG_ERR("Unsupported rsrc config [%d]\n", config->rsrc);
		return -1;
	}

	return rc;
}

static int fruit_fchmod(vfs_handle_struct *handle,
                      struct files_struct *fsp,
                      mode_t mode)
{
	int rc = -1;
	struct fruit_config_data *config = NULL;
	struct smb_filename *smb_fname_adp = NULL;
	const struct smb_filename *smb_fname = NULL;
	NTSTATUS status;

	rc = SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
	if (rc != 0) {
		return rc;
	}

	smb_fname = fsp->fsp_name;
	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data, return -1);

	if (config->rsrc != FRUIT_RSRC_ADFILE) {
		return 0;
	}

	if (!VALID_STAT(smb_fname->st)) {
		return 0;
	}

	if (!S_ISREG(smb_fname->st.st_ex_mode)) {
		return 0;
	}

	rc = adouble_path(talloc_tos(), smb_fname, &smb_fname_adp);
	if (rc != 0) {
		return -1;
	}

	status = openat_pathref_fsp(handle->conn->cwd_fsp,
				    smb_fname_adp);
	if (!NT_STATUS_IS_OK(status)) {
		/* detect ENOENT (mapped to OBJECT_NAME_NOT_FOUND) */
		if (NT_STATUS_EQUAL(status,
				    NT_STATUS_OBJECT_NAME_NOT_FOUND)){
			rc = 0;
			goto out;
		}
		rc = -1;
		goto out;
	}

	DBG_DEBUG("%s\n", smb_fname_adp->base_name);

	rc = SMB_VFS_NEXT_FCHMOD(handle, smb_fname_adp->fsp, mode);
	if (errno == ENOENT) {
		rc = 0;
	}
out:
	TALLOC_FREE(smb_fname_adp);
	return rc;
}

static int fruit_unlinkat(vfs_handle_struct *handle,
			struct files_struct *dirfsp,
			const struct smb_filename *smb_fname,
			int flags)
{
	struct fruit_config_data *config = NULL;
	struct smb_filename *rsrc_smb_fname = NULL;
	int ret;

	if (flags & AT_REMOVEDIR) {
		return SMB_VFS_NEXT_UNLINKAT(handle,
					     dirfsp,
					     smb_fname,
					     AT_REMOVEDIR);
	}

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data, return -1);

	if (is_afpinfo_stream(smb_fname->stream_name)) {
		return fruit_unlink_meta(handle,
				dirfsp,
				smb_fname);
	} else if (is_afpresource_stream(smb_fname->stream_name)) {
		return fruit_unlink_rsrc(handle,
				dirfsp,
				smb_fname,
				false);
	} else if (is_named_stream(smb_fname)) {
		return SMB_VFS_NEXT_UNLINKAT(handle,
				dirfsp,
				smb_fname,
				0);
	} else if (is_adouble_file(smb_fname->base_name)) {
		return SMB_VFS_NEXT_UNLINKAT(handle,
				dirfsp,
				smb_fname,
				0);
	}

	/*
	 * A request to delete the base file. Because 0 byte resource
	 * fork streams are not listed by fruit_streaminfo,
	 * delete_all_streams() can't remove 0 byte resource fork
	 * streams, so we have to cleanup this here.
	 */
	rsrc_smb_fname = synthetic_smb_fname(talloc_tos(),
					     smb_fname->base_name,
					     AFPRESOURCE_STREAM_NAME,
					     NULL,
					     smb_fname->twrp,
					     smb_fname->flags);
	if (rsrc_smb_fname == NULL) {
		return -1;
	}

	ret = fruit_unlink_rsrc(handle, dirfsp, rsrc_smb_fname, true);
	if ((ret != 0) && (errno != ENOENT)) {
		DBG_ERR("Forced unlink of [%s] failed [%s]\n",
			smb_fname_str_dbg(rsrc_smb_fname), strerror(errno));
		TALLOC_FREE(rsrc_smb_fname);
		return -1;
	}
	TALLOC_FREE(rsrc_smb_fname);

	return SMB_VFS_NEXT_UNLINKAT(handle,
			dirfsp,
			smb_fname,
			0);
}

static ssize_t fruit_pread_meta_stream(vfs_handle_struct *handle,
				       files_struct *fsp, void *data,
				       size_t n, off_t offset)
{
	struct fio *fio = fruit_get_complete_fio(handle, fsp);
	ssize_t nread;
	int ret;

	if ((fio == NULL) || fio->fake_fd) {
		return -1;
	}

	nread = SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
	if (nread == -1 || ((size_t)nread == n)) {
		return nread;
	}

	DBG_ERR("Removing [%s] after short read [%zd]\n",
		fsp_str_dbg(fsp), nread);

	ret = SMB_VFS_NEXT_UNLINKAT(handle,
			fsp->conn->cwd_fsp,
			fsp->fsp_name,
			0);
	if (ret != 0) {
		DBG_ERR("Removing [%s] failed\n", fsp_str_dbg(fsp));
		return -1;
	}

	errno = EINVAL;
	return -1;
}

static ssize_t fruit_pread_meta_adouble(vfs_handle_struct *handle,
					files_struct *fsp, void *data,
					size_t n, off_t offset)
{
	AfpInfo *ai = NULL;
	struct adouble *ad = NULL;
	char afpinfo_buf[AFP_INFO_SIZE];
	char *p = NULL;
	ssize_t nread;

	ai = afpinfo_new(talloc_tos());
	if (ai == NULL) {
		return -1;
	}

	ad = ad_fget(talloc_tos(), handle, fsp, ADOUBLE_META);
	if (ad == NULL) {
		nread = -1;
		goto fail;
	}

	p = ad_get_entry(ad, ADEID_FINDERI);
	if (p == NULL) {
		DBG_ERR("No ADEID_FINDERI for [%s]\n", fsp_str_dbg(fsp));
		nread = -1;
		goto fail;
	}

	memcpy(&ai->afpi_FinderInfo[0], p, ADEDLEN_FINDERI);

	nread = afpinfo_pack(ai, afpinfo_buf);
	if (nread != AFP_INFO_SIZE) {
		nread = -1;
		goto fail;
	}

	memcpy(data, afpinfo_buf, n);
	nread = n;

fail:
	TALLOC_FREE(ai);
	return nread;
}

static ssize_t fruit_pread_meta(vfs_handle_struct *handle,
				files_struct *fsp, void *data,
				size_t n, off_t offset)
{
	struct fio *fio = fruit_get_complete_fio(handle, fsp);
	ssize_t nread;
	ssize_t to_return;

	/*
	 * OS X has a off-by-1 error in the offset calculation, so we're
	 * bug compatible here. It won't hurt, as any relevant real
	 * world read requests from the AFP_AfpInfo stream will be
	 * offset=0 n=60. offset is ignored anyway, see below.
	 */
	if ((offset < 0) || (offset >= AFP_INFO_SIZE + 1)) {
		return 0;
	}

	if (fio == NULL) {
		DBG_ERR("Failed to fetch fsp extension\n");
		return -1;
	}

	/* Yes, macOS always reads from offset 0 */
	offset = 0;
	to_return = MIN(n, AFP_INFO_SIZE);

	switch (fio->config->meta) {
	case FRUIT_META_STREAM:
		nread = fruit_pread_meta_stream(handle, fsp, data,
						to_return, offset);
		break;

	case FRUIT_META_NETATALK:
		nread = fruit_pread_meta_adouble(handle, fsp, data,
						 to_return, offset);
		break;

	default:
		DBG_ERR("Unexpected meta config [%d]\n", fio->config->meta);
		return -1;
	}

	if (nread == -1 && fio->fake_fd) {
		AfpInfo *ai = NULL;
		char afpinfo_buf[AFP_INFO_SIZE];

		ai = afpinfo_new(talloc_tos());
		if (ai == NULL) {
			return -1;
		}

		nread = afpinfo_pack(ai, afpinfo_buf);
		TALLOC_FREE(ai);
		if (nread != AFP_INFO_SIZE) {
			return -1;
		}

		memcpy(data, afpinfo_buf, to_return);
		return to_return;
	}

	return nread;
}

static ssize_t fruit_pread_rsrc_stream(vfs_handle_struct *handle,
				       files_struct *fsp, void *data,
				       size_t n, off_t offset)
{
	return SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
}

static ssize_t fruit_pread_rsrc_xattr(vfs_handle_struct *handle,
				      files_struct *fsp, void *data,
				      size_t n, off_t offset)
{
	return SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
}

static ssize_t fruit_pread_rsrc_adouble(vfs_handle_struct *handle,
					files_struct *fsp, void *data,
					size_t n, off_t offset)
{
	struct fio *fio = fruit_get_complete_fio(handle, fsp);
	struct adouble *ad = NULL;
	ssize_t nread;

	if (fio == NULL || fio->ad_fsp == NULL) {
		DBG_ERR("fio/ad_fsp=NULL for [%s]\n", fsp_str_dbg(fsp));
		errno = EBADF;
		return -1;
	}

	ad = ad_fget(talloc_tos(), handle, fio->ad_fsp, ADOUBLE_RSRC);
	if (ad == NULL) {
		DBG_ERR("ad_fget [%s] failed [%s]\n",
			fsp_str_dbg(fio->ad_fsp), strerror(errno));
		return -1;
	}

	nread = SMB_VFS_NEXT_PREAD(handle, fio->ad_fsp, data, n,
				   offset + ad_getentryoff(ad, ADEID_RFORK));

	TALLOC_FREE(ad);
	return nread;
}

static ssize_t fruit_pread_rsrc(vfs_handle_struct *handle,
				files_struct *fsp, void *data,
				size_t n, off_t offset)
{
	struct fio *fio = fruit_get_complete_fio(handle, fsp);
	ssize_t nread;

	if (fio == NULL) {
		errno = EINVAL;
		return -1;
	}

	switch (fio->config->rsrc) {
	case FRUIT_RSRC_STREAM:
		nread = fruit_pread_rsrc_stream(handle, fsp, data, n, offset);
		break;

	case FRUIT_RSRC_ADFILE:
		nread = fruit_pread_rsrc_adouble(handle, fsp, data, n, offset);
		break;

	case FRUIT_RSRC_XATTR:
		nread = fruit_pread_rsrc_xattr(handle, fsp, data, n, offset);
		break;

	default:
		DBG_ERR("Unexpected rsrc config [%d]\n", fio->config->rsrc);
		return -1;
	}

	return nread;
}

static ssize_t fruit_pread(vfs_handle_struct *handle,
			   files_struct *fsp, void *data,
			   size_t n, off_t offset)
{
	struct fio *fio = fruit_get_complete_fio(handle, fsp);
	ssize_t nread;

	DBG_DEBUG("Path [%s] offset=%"PRIdMAX", size=%zd\n",
		  fsp_str_dbg(fsp), (intmax_t)offset, n);

	if (fio == NULL) {
		return SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
	}

	if (fio->type == ADOUBLE_META) {
		nread = fruit_pread_meta(handle, fsp, data, n, offset);
	} else {
		nread = fruit_pread_rsrc(handle, fsp, data, n, offset);
	}

	DBG_DEBUG("Path [%s] nread [%zd]\n", fsp_str_dbg(fsp), nread);
	return nread;
}

static bool fruit_must_handle_aio_stream(struct fio *fio)
{
	if (fio == NULL) {
		return false;
	};

	if (fio->type == ADOUBLE_META) {
		return true;
	}

	if ((fio->type == ADOUBLE_RSRC) &&
	    (fio->config->rsrc == FRUIT_RSRC_ADFILE))
	{
		return true;
	}

	return false;
}

struct fruit_pread_state {
	ssize_t nread;
	struct vfs_aio_state vfs_aio_state;
};

static void fruit_pread_done(struct tevent_req *subreq);

static struct tevent_req *fruit_pread_send(
	struct vfs_handle_struct *handle,
	TALLOC_CTX *mem_ctx,
	struct tevent_context *ev,
	struct files_struct *fsp,
	void *data,
	size_t n, off_t offset)
{
	struct tevent_req *req = NULL;
	struct tevent_req *subreq = NULL;
	struct fruit_pread_state *state = NULL;
	struct fio *fio = fruit_get_complete_fio(handle, fsp);

	req = tevent_req_create(mem_ctx, &state,
				struct fruit_pread_state);
	if (req == NULL) {
		return NULL;
	}

	if (fruit_must_handle_aio_stream(fio)) {
		state->nread = SMB_VFS_PREAD(fsp, data, n, offset);
		if (state->nread == -1) {
			tevent_req_error(req, errno);
		} else if ((size_t)state->nread != n) {
			tevent_req_error(req, EIO);
		} else {
			tevent_req_done(req);
		}
		return tevent_req_post(req, ev);
	}

	subreq = SMB_VFS_NEXT_PREAD_SEND(state, ev, handle, fsp,
					 data, n, offset);
	if (tevent_req_nomem(req, subreq)) {
		return tevent_req_post(req, ev);
	}
	tevent_req_set_callback(subreq, fruit_pread_done, req);
	return req;
}

static void fruit_pread_done(struct tevent_req *subreq)
{
	struct tevent_req *req = tevent_req_callback_data(
		subreq, struct tevent_req);
	struct fruit_pread_state *state = tevent_req_data(
		req, struct fruit_pread_state);

	state->nread = SMB_VFS_PREAD_RECV(subreq, &state->vfs_aio_state);
	TALLOC_FREE(subreq);

	if (tevent_req_error(req, state->vfs_aio_state.error)) {
		return;
	}
	tevent_req_done(req);
}

static ssize_t fruit_pread_recv(struct tevent_req *req,
					struct vfs_aio_state *vfs_aio_state)
{
	struct fruit_pread_state *state = tevent_req_data(
		req, struct fruit_pread_state);
	ssize_t retval = -1;

	if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
		tevent_req_received(req);
		return -1;
	}

	*vfs_aio_state = state->vfs_aio_state;
	retval = state->nread;
	tevent_req_received(req);
	return retval;
}

static ssize_t fruit_pwrite_meta_stream(vfs_handle_struct *handle,
					files_struct *fsp, const void *indata,
					size_t n, off_t offset)
{
	struct fio *fio = fruit_get_complete_fio(handle, fsp);
	const void *data = indata;
	char afpinfo_buf[AFP_INFO_SIZE];
	AfpInfo *ai = NULL;
	size_t nwritten;
	int ret;
	bool ok;

	DBG_DEBUG("Path [%s] offset=%"PRIdMAX", size=%zd\n",
		  fsp_str_dbg(fsp), (intmax_t)offset, n);

	if (fio == NULL) {
		return -1;
	}

	if (fio->fake_fd) {
		struct vfs_open_how how = {
			.flags = fio->flags, .mode = fio->mode,
		};
		int fd = fsp_get_pathref_fd(fsp);

		ret = vfs_fake_fd_close(fd);
		fsp_set_fd(fsp, -1);
		if (ret != 0) {
			DBG_ERR("Close [%s] failed: %s\n",
				fsp_str_dbg(fsp), strerror(errno));
			return -1;
		}

		fd = SMB_VFS_NEXT_OPENAT(handle,
					 NULL, /* opening a stream */
					 fsp->fsp_name,
					 fsp,
					 &how);
		if (fd == -1) {
			DBG_ERR("On-demand create [%s] in write failed: %s\n",
				fsp_str_dbg(fsp), strerror(errno));
			return -1;
		}
		fsp_set_fd(fsp, fd);
		fio->fake_fd = false;
	}

	ai = afpinfo_unpack(talloc_tos(), data, fio->config->validate_afpinfo);
	if (ai == NULL) {
		return -1;
	}

	if (ai_empty_finderinfo(ai)) {
		/*
		 * Writing an all 0 blob to the metadata stream results in the
		 * stream being removed on a macOS server. This ensures we
		 * behave the same and it verified by the "delete AFP_AfpInfo by
		 * writing all 0" test.
		 */
		ret = SMB_VFS_NEXT_FTRUNCATE(handle, fsp, 0);
		if (ret != 0) {
			DBG_ERR("SMB_VFS_NEXT_FTRUNCATE on [%s] failed\n",
				fsp_str_dbg(fsp));
			return -1;
		}

		ok = set_delete_on_close(
			fsp,
			true,
			handle->conn->session_info->security_token,
			handle->conn->session_info->unix_token);
		if (!ok) {
			DBG_ERR("set_delete_on_close on [%s] failed\n",
				fsp_str_dbg(fsp));
			return -1;
		}
		return n;
	}

	if (!fio->config->validate_afpinfo) {
		/*
		 * Ensure the buffer contains a valid header, so marshall
		 * the data from the afpinfo struck back into a buffer
		 * and write that instead of the possibly malformed data
		 * we got from the client.
		 */
		nwritten = afpinfo_pack(ai, afpinfo_buf);
		if (nwritten != AFP_INFO_SIZE) {
			errno = EINVAL;
			return -1;
		}
		data = afpinfo_buf;
	}

	nwritten = SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
	if (nwritten != n) {
		return -1;
	}

	return n;
}

static ssize_t fruit_pwrite_meta_netatalk(vfs_handle_struct *handle,
					  files_struct *fsp, const void *data,
					  size_t n, off_t offset)
{
	struct fruit_config_data *config = NULL;
	struct adouble *ad = NULL;
	AfpInfo *ai = NULL;
	char *p = NULL;
	int ret;
	bool ok;

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data, return -1);

	ai = afpinfo_unpack(talloc_tos(), data, config->validate_afpinfo);
	if (ai == NULL) {
		return -1;
	}

	ad = ad_fget(talloc_tos(), handle, fsp, ADOUBLE_META);
	if (ad == NULL) {
		ad = ad_init(talloc_tos(), ADOUBLE_META);
		if (ad == NULL) {
			return -1;
		}
	}
	p = ad_get_entry(ad, ADEID_FINDERI);
	if (p == NULL) {
		DBG_ERR("No ADEID_FINDERI for [%s]\n", fsp_str_dbg(fsp));
		TALLOC_FREE(ad);
		return -1;
	}

	memcpy(p, &ai->afpi_FinderInfo[0], ADEDLEN_FINDERI);

	ret = ad_fset(handle, ad, fsp);
	if (ret != 0) {
		DBG_ERR("ad_pwrite [%s] failed\n", fsp_str_dbg(fsp));
		TALLOC_FREE(ad);
		return -1;
	}

	TALLOC_FREE(ad);

	if (!ai_empty_finderinfo(ai)) {
		return n;
	}

	/*
	 * Writing an all 0 blob to the metadata stream results in the stream
	 * being removed on a macOS server. This ensures we behave the same and
	 * it verified by the "delete AFP_AfpInfo by writing all 0" test.
	 */

	ok = set_delete_on_close(
		fsp,
		true,
		handle->conn->session_info->security_token,
		handle->conn->session_info->unix_token);
	if (!ok) {
		DBG_ERR("set_delete_on_close on [%s] failed\n",
			fsp_str_dbg(fsp));
		return -1;
	}

	return n;
}

static ssize_t fruit_pwrite_meta(vfs_handle_struct *handle,
				 files_struct *fsp, const void *data,
				 size_t n, off_t offset)
{
	struct fio *fio = fruit_get_complete_fio(handle, fsp);
	ssize_t nwritten;
	uint8_t buf[AFP_INFO_SIZE];
	size_t to_write;
	size_t to_copy;
	int cmp;

	if (fio == NULL) {
		DBG_ERR("Failed to fetch fsp extension\n");
		return -1;
	}

	if (n < 3) {
		errno = EINVAL;
		return -1;
	}

	if (offset != 0 && n < 60) {
		errno = EINVAL;
		return -1;
	}

	if (fio->config->validate_afpinfo) {
		cmp = memcmp(data, "AFP", 3);
		if (cmp != 0) {
			errno = EINVAL;
			return -1;
		}
	}

	if (n <= AFP_OFF_FinderInfo) {
		/*
		 * Nothing to do here really, just return
		 */
		return n;
	}

	offset = 0;

	to_copy = n;
	if (to_copy > AFP_INFO_SIZE) {
		to_copy = AFP_INFO_SIZE;
	}
	memcpy(buf, data, to_copy);

	to_write = n;
	if (to_write != AFP_INFO_SIZE) {
		to_write = AFP_INFO_SIZE;
	}

	switch (fio->config->meta) {
	case FRUIT_META_STREAM:
		nwritten = fruit_pwrite_meta_stream(handle,
						    fsp,
						    buf,
						    to_write,
						    offset);
		break;

	case FRUIT_META_NETATALK:
		nwritten = fruit_pwrite_meta_netatalk(handle,
						      fsp,
						      buf,
						      to_write,
						      offset);
		break;

	default:
		DBG_ERR("Unexpected meta config [%d]\n", fio->config->meta);
		return -1;
	}

	if ((size_t)nwritten != to_write) {
		return -1;
	}

	/*
	 * Return the requested amount, verified against macOS SMB server
	 */
	return n;
}

static ssize_t fruit_pwrite_rsrc_stream(vfs_handle_struct *handle,
					files_struct *fsp, const void *data,
					size_t n, off_t offset)
{
	return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
}

static ssize_t fruit_pwrite_rsrc_xattr(vfs_handle_struct *handle,
				       files_struct *fsp, const void *data,
				       size_t n, off_t offset)
{
	return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
}

static ssize_t fruit_pwrite_rsrc_adouble(vfs_handle_struct *handle,
					 files_struct *fsp, const void *data,
					 size_t n, off_t offset)
{
	struct fio *fio = fruit_get_complete_fio(handle, fsp);
	struct adouble *ad = NULL;
	ssize_t nwritten;
	int ret;

	if (fio == NULL || fio->ad_fsp == NULL) {
		DBG_ERR("fio/ad_fsp=NULL for [%s]\n", fsp_str_dbg(fsp));
		errno = EBADF;
		return -1;
	}

	ad = ad_fget(talloc_tos(), handle, fio->ad_fsp, ADOUBLE_RSRC);
	if (ad == NULL) {
		DBG_ERR("ad_fget [%s] failed [%s]\n",
			fsp_str_dbg(fio->ad_fsp), strerror(errno));
		return -1;
	}

	nwritten = SMB_VFS_NEXT_PWRITE(handle, fio->ad_fsp, data, n,
				       offset + ad_getentryoff(ad, ADEID_RFORK));
	if ((nwritten == -1) || ((size_t)nwritten != n)) {
		DBG_ERR("Short write on [%s] [%zd/%zd]\n",
			fsp_str_dbg(fio->ad_fsp), nwritten, n);
		TALLOC_FREE(ad);
		return -1;
	}

	if ((n + offset) > ad_getentrylen(ad, ADEID_RFORK)) {
		ad_setentrylen(ad, ADEID_RFORK, n + offset);
		ret = ad_fset(handle, ad, fio->ad_fsp);
		if (ret != 0) {
			DBG_ERR("ad_pwrite [%s] failed\n", fsp_str_dbg(fio->ad_fsp));
			TALLOC_FREE(ad);
			return -1;
		}
	}

	TALLOC_FREE(ad);
	return n;
}

static ssize_t fruit_pwrite_rsrc(vfs_handle_struct *handle,
				 files_struct *fsp, const void *data,
				 size_t n, off_t offset)
{
	struct fio *fio = fruit_get_complete_fio(handle, fsp);
	ssize_t nwritten;

	if (fio == NULL) {
		DBG_ERR("Failed to fetch fsp extension\n");
		return -1;
	}

	switch (fio->config->rsrc) {
	case FRUIT_RSRC_STREAM:
		nwritten = fruit_pwrite_rsrc_stream(handle, fsp, data, n, offset);
		break;

	case FRUIT_RSRC_ADFILE:
		nwritten = fruit_pwrite_rsrc_adouble(handle, fsp, data, n, offset);
		break;

	case FRUIT_RSRC_XATTR:
		nwritten = fruit_pwrite_rsrc_xattr(handle, fsp, data, n, offset);
		break;

	default:
		DBG_ERR("Unexpected rsrc config [%d]\n", fio->config->rsrc);
		return -1;
	}

	return nwritten;
}

static ssize_t fruit_pwrite(vfs_handle_struct *handle,
			    files_struct *fsp, const void *data,
			    size_t n, off_t offset)
{
	struct fio *fio = fruit_get_complete_fio(handle, fsp);
	ssize_t nwritten;

	DBG_DEBUG("Path [%s] offset=%"PRIdMAX", size=%zd\n",
		  fsp_str_dbg(fsp), (intmax_t)offset, n);

	if (fio == NULL) {
		return SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
	}

	if (fio->type == ADOUBLE_META) {
		nwritten = fruit_pwrite_meta(handle, fsp, data, n, offset);
	} else {
		nwritten = fruit_pwrite_rsrc(handle, fsp, data, n, offset);
	}

	DBG_DEBUG("Path [%s] nwritten=%zd\n", fsp_str_dbg(fsp), nwritten);
	return nwritten;
}

struct fruit_pwrite_state {
	ssize_t nwritten;
	struct vfs_aio_state vfs_aio_state;
};

static void fruit_pwrite_done(struct tevent_req *subreq);

static struct tevent_req *fruit_pwrite_send(
	struct vfs_handle_struct *handle,
	TALLOC_CTX *mem_ctx,
	struct tevent_context *ev,
	struct files_struct *fsp,
	const void *data,
	size_t n, off_t offset)
{
	struct tevent_req *req = NULL;
	struct tevent_req *subreq = NULL;
	struct fruit_pwrite_state *state = NULL;
	struct fio *fio = fruit_get_complete_fio(handle, fsp);

	req = tevent_req_create(mem_ctx, &state,
				struct fruit_pwrite_state);
	if (req == NULL) {
		return NULL;
	}

	if (fruit_must_handle_aio_stream(fio)) {
		state->nwritten = SMB_VFS_PWRITE(fsp, data, n, offset);
		if (state->nwritten == -1) {
			tevent_req_error(req, errno);
		} else if ((size_t)state->nwritten != n) {
			tevent_req_error(req, EIO);
		} else {
			tevent_req_done(req);
		}
		return tevent_req_post(req, ev);
	}

	subreq = SMB_VFS_NEXT_PWRITE_SEND(state, ev, handle, fsp,
					  data, n, offset);
	if (tevent_req_nomem(req, subreq)) {
		return tevent_req_post(req, ev);
	}
	tevent_req_set_callback(subreq, fruit_pwrite_done, req);
	return req;
}

static void fruit_pwrite_done(struct tevent_req *subreq)
{
	struct tevent_req *req = tevent_req_callback_data(
		subreq, struct tevent_req);
	struct fruit_pwrite_state *state = tevent_req_data(
		req, struct fruit_pwrite_state);

	state->nwritten = SMB_VFS_PWRITE_RECV(subreq, &state->vfs_aio_state);
	TALLOC_FREE(subreq);

	if (tevent_req_error(req, state->vfs_aio_state.error)) {
		return;
	}
	tevent_req_done(req);
}

static ssize_t fruit_pwrite_recv(struct tevent_req *req,
					 struct vfs_aio_state *vfs_aio_state)
{
	struct fruit_pwrite_state *state = tevent_req_data(
		req, struct fruit_pwrite_state);
	ssize_t retval = -1;

	if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
		tevent_req_received(req);
		return -1;
	}

	*vfs_aio_state = state->vfs_aio_state;
	retval = state->nwritten;
	tevent_req_received(req);
	return retval;
}

struct fruit_fsync_state {
	int ret;
	struct vfs_aio_state vfs_aio_state;
};

static void fruit_fsync_done(struct tevent_req *subreq);

static struct tevent_req *fruit_fsync_send(
	struct vfs_handle_struct *handle,
	TALLOC_CTX *mem_ctx,
	struct tevent_context *ev,
	struct files_struct *fsp)
{
	struct tevent_req *req = NULL;
	struct tevent_req *subreq = NULL;
	struct fruit_fsync_state *state = NULL;
	struct fio *fio = fruit_get_complete_fio(handle, fsp);

	req = tevent_req_create(mem_ctx, &state,
				struct fruit_fsync_state);
	if (req == NULL) {
		return NULL;
	}

	if (fruit_must_handle_aio_stream(fio)) {
		struct adouble *ad = NULL;

		if (fio->type == ADOUBLE_META) {
			/*
			 * We must never pass a fake_fd
			 * to lower level fsync calls.
			 * Everything is already done
			 * synchronously, so just return
			 * true.
			 */
			SMB_ASSERT(fio->fake_fd);
			tevent_req_done(req);
			return tevent_req_post(req, ev);
		}

		/*
		 * We know the following must be true,
		 * as it's the condition for fruit_must_handle_aio_stream()
		 * to return true if fio->type == ADOUBLE_RSRC.
		 */
		SMB_ASSERT(fio->config->rsrc == FRUIT_RSRC_ADFILE);
		if (fio->ad_fsp == NULL) {
			tevent_req_error(req, EBADF);
			return tevent_req_post(req, ev);
		}
		ad = ad_fget(talloc_tos(), handle, fio->ad_fsp, ADOUBLE_RSRC);
		if (ad == NULL) {
			tevent_req_error(req, ENOMEM);
			return tevent_req_post(req, ev);
		}
		fsp = fio->ad_fsp;
	}

	subreq = SMB_VFS_NEXT_FSYNC_SEND(state, ev, handle, fsp);
	if (tevent_req_nomem(req, subreq)) {
		return tevent_req_post(req, ev);
	}
	tevent_req_set_callback(subreq, fruit_fsync_done, req);
	return req;
}

static void fruit_fsync_done(struct tevent_req *subreq)
{
	struct tevent_req *req = tevent_req_callback_data(
		subreq, struct tevent_req);
	struct fruit_fsync_state *state = tevent_req_data(
		req, struct fruit_fsync_state);

	state->ret = SMB_VFS_FSYNC_RECV(subreq, &state->vfs_aio_state);
	TALLOC_FREE(subreq);
	if (state->ret != 0) {
		tevent_req_error(req, errno);
		return;
	}
	tevent_req_done(req);
}

static int fruit_fsync_recv(struct tevent_req *req,
					struct vfs_aio_state *vfs_aio_state)
{
	struct fruit_fsync_state *state = tevent_req_data(
		req, struct fruit_fsync_state);
	int retval = -1;

	if (tevent_req_is_unix_error(req, &vfs_aio_state->error)) {
		tevent_req_received(req);
		return -1;
	}

	*vfs_aio_state = state->vfs_aio_state;
	retval = state->ret;
	tevent_req_received(req);
	return retval;
}

static int fruit_fstatat_meta(struct vfs_handle_struct *handle,
			      const struct fruit_config_data *config,
			      const struct files_struct *dirfsp,
			      const struct smb_filename *_smb_relname,
			      SMB_STRUCT_STAT *sbuf,
			      int flags)
{
	struct adouble_buf ad = {};
	struct smb_filename *smb_relname = NULL;
	uint8_t ad_data[402];
	NTSTATUS status;
	int ret = -1;
	ssize_t ealen;
	ino_t ino;
	bool ok;

	{
		/* Populate the stat struct with info from the base file. */

		struct smb_filename base_name = *smb_relname;
		base_name.stream_name = NULL;

		ret = SMB_VFS_NEXT_FSTATAT(
			handle, dirfsp, &base_name, sbuf, flags);
	}

	if (ret == -1) {
		goto fail;
	}

	ino = hash_inode(sbuf, smb_relname->stream_name);

	if (config->meta == FRUIT_META_STREAM) {
		ret = SMB_VFS_NEXT_FSTATAT(
			handle, dirfsp, smb_relname, sbuf, flags);
		if (ret == -1) {
			goto fail;
		}
		sbuf->st_ex_ino = ino;
		goto done;
	}

	if (config->meta != FRUIT_META_NETATALK) {
		DBG_ERR("Unexpected meta config [%d]\n", config->meta);
		errno = EINVAL;
		goto fail;
	}

	sbuf->st_ex_ino = ino;
	sbuf->st_ex_size = AFP_INFO_SIZE;

	/*
	 * FRUIT_META_NETATALK
	 */

	smb_relname = cp_smb_filename_nostream(talloc_tos(), _smb_relname);
	if (smb_relname == NULL) {
		errno = ENOMEM;
		goto fail;
	}

	if (flags & AT_SYMLINK_NOFOLLOW) {
		status = openat_pathref_fsp_lcomp(
			discard_const_p(struct files_struct, dirfsp),
			smb_relname,
			0);
	} else {
		status = openat_pathref_fsp(dirfsp, smb_relname);
	}
	if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
		errno = ENOENT;
		goto fail;
	}

	ealen = SMB_VFS_FGETXATTR(
		smb_relname->fsp, AFPINFO_EA_NETATALK, ad_data,
		sizeof(ad_data));
	if (ealen == -1) {
		if (errno == ENOATTR) {
			errno = ENOENT;
		}
		goto fail;
	}

	ok = adouble_buf_parse(ad_data, ealen, &ad);
	if (!ok) {
		errno = EIO;
		goto fail;
	}

	if (ad.entries[ADEID_FILEDATESI].data != NULL) {
		/*
		 * Update btime
		 */
		struct timespec btime = {};
		uint32_t ad_btime;

		memcpy(&ad_btime,
		       ad.entries[ADEID_FILEDATESI].data,
		       sizeof(ad_btime));
		ad_btime = AD_DATE_TO_UNIX(ad_btime);
		btime.tv_sec = convert_uint32_t_to_time_t(ad_btime);
		update_stat_ex_create_time(sbuf, btime);
	}

done:
	TALLOC_FREE(smb_relname);
	return 0;

fail:
	{
		int err = errno;
		TALLOC_FREE(smb_relname);
		errno = err;
	}
	return -1;
}

static int fruit_fstatat_rsrc(struct vfs_handle_struct *handle,
			      const struct fruit_config_data *config,
			      const struct files_struct *dirfsp,
			      const struct smb_filename *smb_relname,
			      SMB_STRUCT_STAT *sbuf,
			      int flags)
{
	struct smb_filename *ad_name = NULL;
	struct files_struct *ad_fsp = NULL;
	uint8_t buf[65536];
	struct adouble_buf adbuf = {};
	ssize_t nread;
	NTSTATUS status;
	ino_t ino;
	int ret;
	bool ok;

	if (config->rsrc == FRUIT_RSRC_STREAM) {
		ret = SMB_VFS_NEXT_FSTATAT(
			handle, dirfsp, smb_relname, sbuf, flags);
		return ret;
	}

	if (config->rsrc != FRUIT_RSRC_ADFILE) {
		DBG_ERR("Unexpected rsrc config [%d]\n", config->rsrc);
		errno = ENOSYS;
		return -1;
	}

	/*
	 * FRUIT_RSRC_ADFILE
	 */

	{
		/* Populate the stat struct with info from the base file. */

		struct smb_filename base_name = *smb_relname;
		base_name.stream_name = NULL;

		ret = SMB_VFS_NEXT_FSTATAT(
			handle, dirfsp, &base_name, sbuf, flags);
	}

	if (ret == -1) {
		goto fail;
	}

	ino = hash_inode(sbuf, smb_relname->stream_name);

	ad_name = cp_smb_filename_nostream(talloc_tos(), smb_relname);
	if (ad_name == NULL) {
		errno = ENOMEM;
		goto fail;
	}
	ad_name->base_name = talloc_asprintf(ad_name,
					     "._%s",
					     ad_name->base_name);
	if (ad_name->base_name == NULL) {
		errno = ENOMEM;
		goto fail;
	}

	status = openat_pathref_fsp(dirfsp, ad_name);
	if (!NT_STATUS_IS_OK(status)) {
		errno = map_errno_from_nt_status(status);
		goto fail;
	}

	status = SMB_VFS_CREATE_FILE(handle->conn, /* conn */
				     NULL,	   /* req */
				     discard_const_p(struct files_struct,
						     dirfsp), /* dirfsp */
				     ad_name->fsp->fsp_name,  /* fname */
				     FILE_READ_DATA,	      /* access_mask */
				     (FILE_SHARE_READ |
				      FILE_SHARE_WRITE | /* share_access */
				      FILE_SHARE_DELETE),
				     FILE_OPEN, /* create_disposition*/
				     0,		/* create_options */
				     0,		/* file_attributes */
				     INTERNAL_OPEN_ONLY, /* oplock_request */
				     NULL,		 /* lease */
				     0,			 /* allocation_size */
				     0,			 /* private_flags */
				     NULL,		 /* sd */
				     NULL,		 /* ea_list */
				     &ad_fsp,		 /* result */
				     NULL,		 /* pinfo */
				     NULL,
				     NULL); /* create context */
	if (!NT_STATUS_IS_OK(status)) {
		errno = map_errno_from_nt_status(status);
		goto fail;
	}

	nread = SMB_VFS_PREAD(ad_fsp, buf, sizeof(buf), 0);
	if (nread == -1) {
		goto fail;
	}

	close_file_free(NULL, &ad_fsp, NORMAL_CLOSE);
	ad_fsp = NULL;

	ok = adouble_buf_parse(buf, nread, &adbuf);
	if (!ok) {
		errno = EINVAL;
		goto fail;
	}

	sbuf->st_ex_ino = ino;
	sbuf->st_ex_size = adbuf.entries[ADEID_RFORK].length;

	TALLOC_FREE(ad_name);
	return 0;

fail:
	{
		int err = errno;
		if (ad_fsp != NULL) {
			close_file_free(NULL, &ad_fsp, NORMAL_CLOSE);
			ad_fsp = NULL;
		}
		TALLOC_FREE(ad_name);
		errno = err;
	}
	return -1;
}

static int fruit_fstatat(struct vfs_handle_struct *handle,
			 const struct files_struct *dirfsp,
			 const struct smb_filename *smb_relname,
			 SMB_STRUCT_STAT *sbuf,
			 int flags)
{
	struct fruit_config_data *config = NULL;
	int rc;

	DBG_DEBUG("called for %s/%s\n",
		  fsp_str_dbg(dirfsp),
		  smb_fname_str_dbg(smb_relname));

	SMB_VFS_HANDLE_GET_DATA(handle,
				config,
				struct fruit_config_data,
				return -1);

	if (is_afpinfo_stream(smb_relname->stream_name)) {
		rc = fruit_fstatat_meta(
			handle, config, dirfsp, smb_relname, sbuf, flags);
	} else if (is_afpresource_stream(smb_relname->stream_name)) {
		rc = fruit_fstatat_rsrc(
			handle, config, dirfsp, smb_relname, sbuf, flags);
	} else {
		rc = SMB_VFS_NEXT_FSTATAT(
			handle, dirfsp, smb_relname, sbuf, flags);
	}

	return rc;
}

/**
 * Helper to stat/lstat the base file of an smb_fname.
 */
static int fruit_stat_base(vfs_handle_struct *handle,
			   struct smb_filename *smb_fname,
			   bool follow_links)
{
	char *tmp_stream_name;
	int rc;

	tmp_stream_name = smb_fname->stream_name;
	smb_fname->stream_name = NULL;
	if (follow_links) {
		rc = SMB_VFS_NEXT_STAT(handle, smb_fname);
	} else {
		rc = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
	}
	smb_fname->stream_name = tmp_stream_name;

	DBG_DEBUG("[%s] dev [%ju] ino [%ju]\n",
		  smb_fname->base_name,
		  (uintmax_t)smb_fname->st.st_ex_dev,
		  (uintmax_t)smb_fname->st.st_ex_ino);
	return rc;
}

static int fruit_stat(vfs_handle_struct *handle,
		      struct smb_filename *smb_fname)
{
	struct stat_ex st = {};
	int ret;

	DBG_DEBUG("called for %s\n", smb_fname_str_dbg(smb_fname));

	ret = fruit_fstatat(handle, handle->conn->cwd_fsp, smb_fname, &st, 0);
	if (ret == -1) {
		return -1;
	}

	smb_fname->st = st;
	return 0;
}

static int fruit_lstat(vfs_handle_struct *handle,
		       struct smb_filename *smb_fname)
{
	struct stat_ex st = {};
	int ret;

	DBG_DEBUG("called for %s\n", smb_fname_str_dbg(smb_fname));

	ret = fruit_fstatat(handle,
			    handle->conn->cwd_fsp,
			    smb_fname,
			    &st,
			    AT_SYMLINK_NOFOLLOW);
	if (ret == -1) {
		return -1;
	}

	smb_fname->st = st;
	return 0;
}

static int fruit_fstat_meta_stream(vfs_handle_struct *handle,
				   files_struct *fsp,
				   SMB_STRUCT_STAT *sbuf)
{
	struct fio *fio = fruit_get_complete_fio(handle, fsp);
	struct smb_filename smb_fname;
	ino_t ino;
	int ret;

	if (fio == NULL) {
		return -1;
	}

	if (fio->fake_fd) {
		ret = fruit_stat_base(handle, fsp->base_fsp->fsp_name, false);
		if (ret != 0) {
			return -1;
		}

		*sbuf = fsp->base_fsp->fsp_name->st;
		sbuf->st_ex_size = AFP_INFO_SIZE;
		sbuf->st_ex_ino = hash_inode(sbuf, fsp->fsp_name->stream_name);
		return 0;
	}

	smb_fname = (struct smb_filename) {
		.base_name = fsp->fsp_name->base_name,
		.twrp = fsp->fsp_name->twrp,
	};

	ret = fruit_stat_base(handle, &smb_fname, false);
	if (ret != 0) {
		return -1;
	}
	*sbuf = smb_fname.st;

	ino = hash_inode(sbuf, fsp->fsp_name->stream_name);

	ret = SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
	if (ret != 0) {
		return -1;
	}

	sbuf->st_ex_ino = ino;
	return 0;
}

static int fruit_fstat_meta_netatalk(vfs_handle_struct *handle,
				     files_struct *fsp,
				     SMB_STRUCT_STAT *sbuf)
{
	int ret;

	ret = fruit_stat_base(handle, fsp->base_fsp->fsp_name, false);
	if (ret != 0) {
		return -1;
	}

	*sbuf = fsp->base_fsp->fsp_name->st;
	sbuf->st_ex_size = AFP_INFO_SIZE;
	sbuf->st_ex_ino = hash_inode(sbuf, fsp->fsp_name->stream_name);

	return 0;
}

static int fruit_fstat_meta(vfs_handle_struct *handle,
			    files_struct *fsp,
			    SMB_STRUCT_STAT *sbuf,
			    struct fio *fio)
{
	int ret;

	DBG_DEBUG("Path [%s]\n", fsp_str_dbg(fsp));

	switch (fio->config->meta) {
	case FRUIT_META_STREAM:
		ret = fruit_fstat_meta_stream(handle, fsp, sbuf);
		break;

	case FRUIT_META_NETATALK:
		ret = fruit_fstat_meta_netatalk(handle, fsp, sbuf);
		break;

	default:
		DBG_ERR("Unexpected meta config [%d]\n", fio->config->meta);
		return -1;
	}

	DBG_DEBUG("Path [%s] ret [%d]\n", fsp_str_dbg(fsp), ret);
	return ret;
}

static int fruit_fstat_rsrc_xattr(vfs_handle_struct *handle,
				  files_struct *fsp,
				  SMB_STRUCT_STAT *sbuf)
{
	return SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
}

static int fruit_fstat_rsrc_stream(vfs_handle_struct *handle,
				   files_struct *fsp,
				   SMB_STRUCT_STAT *sbuf)
{
	return SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
}

static int fruit_fstat_rsrc_adouble(vfs_handle_struct *handle,
				    files_struct *fsp,
				    SMB_STRUCT_STAT *sbuf)
{
	struct fio *fio = fruit_get_complete_fio(handle, fsp);
	struct adouble *ad = NULL;
	int ret;

	if (fio == NULL || fio->ad_fsp == NULL) {
		DBG_ERR("fio/ad_fsp=NULL for [%s]\n", fsp_str_dbg(fsp));
		errno = EBADF;
		return -1;
	}

	/* Populate the stat struct with info from the base file. */
	ret = fruit_stat_base(handle, fsp->base_fsp->fsp_name, false);
	if (ret == -1) {
		return -1;
	}

	ad = ad_fget(talloc_tos(), handle, fio->ad_fsp, ADOUBLE_RSRC);
	if (ad == NULL) {
		DBG_ERR("ad_fget [%s] failed [%s]\n",
			fsp_str_dbg(fio->ad_fsp), strerror(errno));
		return -1;
	}

	*sbuf = fsp->base_fsp->fsp_name->st;
	sbuf->st_ex_size = ad_getentrylen(ad, ADEID_RFORK);
	sbuf->st_ex_ino = hash_inode(sbuf, fsp->fsp_name->stream_name);

	TALLOC_FREE(ad);
	return 0;
}

static int fruit_fstat_rsrc(vfs_handle_struct *handle, files_struct *fsp,
			    SMB_STRUCT_STAT *sbuf, struct fio *fio)
{
	int ret;

	switch (fio->config->rsrc) {
	case FRUIT_RSRC_STREAM:
		ret = fruit_fstat_rsrc_stream(handle, fsp, sbuf);
		break;

	case FRUIT_RSRC_ADFILE:
		ret = fruit_fstat_rsrc_adouble(handle, fsp, sbuf);
		break;

	case FRUIT_RSRC_XATTR:
		ret = fruit_fstat_rsrc_xattr(handle, fsp, sbuf);
		break;

	default:
		DBG_ERR("Unexpected rsrc config [%d]\n", fio->config->rsrc);
		return -1;
	}

	return ret;
}

static int fruit_fstat(vfs_handle_struct *handle, files_struct *fsp,
		       SMB_STRUCT_STAT *sbuf)
{
	struct fio *fio = fruit_get_complete_fio(handle, fsp);
	int rc;

	if (fio == NULL) {
		return SMB_VFS_NEXT_FSTAT(handle, fsp, sbuf);
	}

	DBG_DEBUG("Path [%s]\n", fsp_str_dbg(fsp));

	if (fio->type == ADOUBLE_META) {
		rc = fruit_fstat_meta(handle, fsp, sbuf, fio);
	} else {
		rc = fruit_fstat_rsrc(handle, fsp, sbuf, fio);
	}

	if (rc == 0) {
		sbuf->st_ex_mode &= ~S_IFMT;
		sbuf->st_ex_mode |= S_IFREG;
		sbuf->st_ex_blocks = sbuf->st_ex_size / STAT_ST_BLOCKSIZE + 1;
	}

	DBG_DEBUG("Path [%s] rc [%d] size [%"PRIdMAX"]\n",
		  fsp_str_dbg(fsp), rc, (intmax_t)sbuf->st_ex_size);
	return rc;
}

static NTSTATUS delete_invalid_meta_stream(
	vfs_handle_struct *handle,
	const struct smb_filename *smb_fname,
	TALLOC_CTX *mem_ctx,
	unsigned int *pnum_streams,
	struct stream_struct **pstreams,
	off_t size)
{
	struct smb_filename *sname = NULL;
	NTSTATUS status;
	int ret;
	bool ok;

	ok = del_fruit_stream(mem_ctx, pnum_streams, pstreams, AFPINFO_STREAM);
	if (!ok) {
		return NT_STATUS_INTERNAL_ERROR;
	}

	if (size == 0) {
		return NT_STATUS_OK;
	}

	status = synthetic_pathref(talloc_tos(),
				   handle->conn->cwd_fsp,
				   smb_fname->base_name,
				   AFPINFO_STREAM_NAME,
				   NULL,
				   smb_fname->twrp,
				   0,
				   &sname);
	if (!NT_STATUS_IS_OK(status)) {
		return NT_STATUS_NO_MEMORY;
	}

	ret = SMB_VFS_NEXT_UNLINKAT(handle,
			handle->conn->cwd_fsp,
			sname,
			0);
	if (ret != 0) {
		DBG_ERR("Removing [%s] failed\n", smb_fname_str_dbg(sname));
		TALLOC_FREE(sname);
		return map_nt_error_from_unix(errno);
	}

	TALLOC_FREE(sname);
	return NT_STATUS_OK;
}

static NTSTATUS fruit_streaminfo_meta_stream(
	vfs_handle_struct *handle,
	struct files_struct *fsp,
	const struct smb_filename *smb_fname,
	TALLOC_CTX *mem_ctx,
	unsigned int *pnum_streams,
	struct stream_struct **pstreams)
{
	struct stream_struct *stream = *pstreams;
	unsigned int i, num_streams = *pnum_streams;

	for (i = 0; i < num_streams; i++) {
		if (strequal_m(stream[i].name, AFPINFO_STREAM)) {
			break;
		}
	}

	if (i == num_streams) {
		return NT_STATUS_OK;
	}

	if (stream[i].size != AFP_INFO_SIZE) {
		DBG_ERR("Removing invalid AFPINFO_STREAM size [%jd] from [%s]\n",
			(intmax_t)stream[i].size, smb_fname_str_dbg(smb_fname));

		return delete_invalid_meta_stream(handle,
						  smb_fname,
						  mem_ctx,
						  pnum_streams,
						  pstreams,
						  stream[i].size);
	}


	return NT_STATUS_OK;
}

static NTSTATUS fruit_streaminfo_meta_netatalk(
	vfs_handle_struct *handle,
	struct files_struct *fsp,
	const struct smb_filename *smb_fname,
	TALLOC_CTX *mem_ctx,
	unsigned int *pnum_streams,
	struct stream_struct **pstreams)
{
	struct stream_struct *stream = *pstreams;
	unsigned int i, num_streams = *pnum_streams;
	struct adouble *ad = NULL;
	bool is_fi_empty;
	bool ok;

	/* Remove the Netatalk xattr from the list */
	ok = del_fruit_stream(mem_ctx, pnum_streams, pstreams,
			      ":" NETATALK_META_XATTR ":$DATA");
	if (!ok) {
		return NT_STATUS_NO_MEMORY;
	}

	/*
	 * Check if there's a AFPINFO_STREAM from the VFS streams
	 * backend and if yes, remove it from the list
	 */
	for (i = 0; i < num_streams; i++) {
		if (strequal_m(stream[i].name, AFPINFO_STREAM)) {
			break;
		}
	}

	if (i < num_streams) {
		DBG_WARNING("Unexpected AFPINFO_STREAM on [%s]\n",
			    smb_fname_str_dbg(smb_fname));

		ok = del_fruit_stream(mem_ctx, pnum_streams, pstreams,
				      AFPINFO_STREAM);
		if (!ok) {
			return NT_STATUS_INTERNAL_ERROR;
		}
	}

	ad = ad_get_meta_fsp(talloc_tos(), handle, smb_fname);
	if (ad == NULL) {
		return NT_STATUS_OK;
	}

	is_fi_empty = ad_empty_finderinfo(ad);
	TALLOC_FREE(ad);

	if (is_fi_empty) {
		return NT_STATUS_OK;
	}

	ok = add_fruit_stream(mem_ctx, pnum_streams, pstreams,
			      AFPINFO_STREAM_NAME, AFP_INFO_SIZE,
			      smb_roundup(handle->conn, AFP_INFO_SIZE));
	if (!ok) {
		return NT_STATUS_NO_MEMORY;
	}

	return NT_STATUS_OK;
}

static NTSTATUS fruit_streaminfo_meta(vfs_handle_struct *handle,
				      struct files_struct *fsp,
				      const struct smb_filename *smb_fname,
				      TALLOC_CTX *mem_ctx,
				      unsigned int *pnum_streams,
				      struct stream_struct **pstreams)
{
	struct fruit_config_data *config = NULL;
	NTSTATUS status;

	SMB_VFS_HANDLE_GET_DATA(handle, config, struct fruit_config_data,
				return NT_STATUS_INTERNAL_ERROR);

	switch (config->meta) {
	case FRUIT_META_NETATALK:
		status = fruit_streaminfo_meta_netatalk(handle, fsp, smb_fname,
							mem_ctx, pnum_streams,
							pstreams);
		break;

	case FRUIT_META_STREAM:
		status = fruit_streaminfo_meta_stream(handle, fsp, smb_fname,
						      mem_ctx, pnum_streams,
						      pstreams);
		break;

	default:
		return NT_STATUS_INTERNAL_ERROR;
	}

	return status;
}

static NTSTATUS fruit_streaminfo_rsrc_stream(
	vfs_handle_struct *handle,
	struct files_struct *fsp,
	const struct smb_filename *smb_fname,
	TALLOC_CTX *mem_ctx,
	unsigned int *pnum_streams,
	struct stream_struct **pstreams)
{
	filter_empty_rsrc_stream(pnum_streams, pstreams);
	return NT_STATUS_OK;
}

static NTSTATUS fruit_streaminfo_rsrc_xattr(
	vfs_handle_struct *handle,
	struct files_struct *fsp,
	const struct smb_filename *smb_fname,
	TALLOC_CTX *mem_ctx,
	unsigned int *pnum_streams,
	struct stream_struct **pstreams)
{
	filter_empty_rsrc_stream(pnum_streams, pstreams);
	return NT_STATUS_OK;
}

static NTSTATUS fruit_streaminfo_rsrc_adouble(
	vfs_handle_struct *handle,
	struct files_struct *fsp,
	const struct smb_filename *smb_fname,
	TALLOC_CTX *mem_ctx,
	unsigned int *pnum_streams,
	struct stream_struct **pstreams)
{
	struct stream_struct *stream = *pstreams;
	unsigned int i, num_streams = *pnum_streams;
	struct adouble *ad = NULL;
	bool ok;
	size_t rlen;

	/*
	 * Check if there's a AFPRESOURCE_STREAM from the VFS streams backend
	 * and if yes, remove it from the list
	 */
	for (i = 0; i < num_streams; i++) {
		if (strequal_m(stream[i].name, AFPRESOURCE_STREAM)) {
			break;
		}
	}

	if (i < num_streams) {
		DBG_WARNING("Unexpected AFPRESOURCE_STREAM on [%s]\n",
			    smb_fname_str_dbg(smb_fname));

		ok = del_fruit_stream(mem_ctx, pnum_streams, pstreams,
				      AFPRESOURCE_STREAM);
		if (!ok) {
			return NT_STATUS_INTERNAL_ERROR;
		}
	}

	ad = ad_get(talloc_tos(), handle, smb_fname, ADOUBLE_RSRC);
	if (ad == NULL) {
		return NT_STATUS_OK;
	}

	rlen = ad_getentrylen(ad, ADEID_RFORK);
	TALLOC_FREE(ad);

	if (rlen == 0) {
		return NT_STATUS_OK;
	}

	ok = add_fruit_stream(mem_ctx, pnum_streams, pstreams,
			      AFPRESOURCE_STREAM_NAME, rlen,
			      smb_roundup(handle->conn, rlen));
	if (!ok) {
		return NT_STATUS_NO_MEMORY;
	}

	return NT_STATUS_OK;
}

static NTSTATUS fruit_streaminfo_rsrc(vfs_handle_struct *handle,
				      struct files_struct *fsp,
				      const struct smb_filename *smb_fname,
				      TALLOC_CTX *mem_ctx,
				      unsigned int *pnum_streams,
				      struct stream_struct **pstreams)
{
	struct fruit_config_data *config = NULL;
	NTSTATUS status;

	if (S_ISDIR(smb_fname->st.st_ex_mode)) {
		return NT_STATUS_OK;
	}

	SMB_VFS_HANDLE_GET_DATA(handle, config, struct fruit_config_data,
				return NT_STATUS_INTERNAL_ERROR);

	switch (config->rsrc) {
	case FRUIT_RSRC_STREAM:
		status = fruit_streaminfo_rsrc_stream(handle, fsp, smb_fname,
						      mem_ctx, pnum_streams,
						      pstreams);
		break;

	case FRUIT_RSRC_XATTR:
		status = fruit_streaminfo_rsrc_xattr(handle, fsp, smb_fname,
						     mem_ctx, pnum_streams,
						     pstreams);
		break;

	case FRUIT_RSRC_ADFILE:
		status = fruit_streaminfo_rsrc_adouble(handle, fsp, smb_fname,
						       mem_ctx, pnum_streams,
						       pstreams);
		break;

	default:
		return NT_STATUS_INTERNAL_ERROR;
	}

	return status;
}

static void fruit_filter_empty_streams(unsigned int *pnum_streams,
				       struct stream_struct **pstreams)
{
	unsigned num_streams = *pnum_streams;
	struct stream_struct *streams = *pstreams;
	unsigned i = 0;

	if (!global_fruit_config.nego_aapl) {
		return;
	}

	while (i < num_streams) {
		struct smb_filename smb_fname = (struct smb_filename) {
			.stream_name = streams[i].name,
		};

		if (is_ntfs_default_stream_smb_fname(&smb_fname)
		    || streams[i].size > 0)
		{
			i++;
			continue;
		}

		streams[i] = streams[num_streams - 1];
		num_streams--;
	}

	*pnum_streams = num_streams;
}

static NTSTATUS fruit_fstreaminfo(vfs_handle_struct *handle,
				 struct files_struct *fsp,
				 TALLOC_CTX *mem_ctx,
				 unsigned int *pnum_streams,
				 struct stream_struct **pstreams)
{
	struct fruit_config_data *config = NULL;
	const struct smb_filename *smb_fname = NULL;
	NTSTATUS status;

	smb_fname = fsp->fsp_name;

	SMB_VFS_HANDLE_GET_DATA(handle, config, struct fruit_config_data,
				return NT_STATUS_UNSUCCESSFUL);

	DBG_DEBUG("Path [%s]\n", smb_fname_str_dbg(smb_fname));

	status = SMB_VFS_NEXT_FSTREAMINFO(handle, fsp, mem_ctx,
					 pnum_streams, pstreams);
	if (!NT_STATUS_IS_OK(status)) {
		return status;
	}

	fruit_filter_empty_streams(pnum_streams, pstreams);

	status = fruit_streaminfo_meta(handle, fsp, smb_fname,
				       mem_ctx, pnum_streams, pstreams);
	if (!NT_STATUS_IS_OK(status)) {
		return status;
	}

	status = fruit_streaminfo_rsrc(handle, fsp, smb_fname,
				       mem_ctx, pnum_streams, pstreams);
	if (!NT_STATUS_IS_OK(status)) {
		return status;
	}

	return NT_STATUS_OK;
}

static int fruit_fntimes(vfs_handle_struct *handle,
			 files_struct *fsp,
			 struct smb_file_time *ft)
{
	int rc = 0;
	struct adouble *ad = NULL;
	struct fruit_config_data *config = NULL;

	SMB_VFS_HANDLE_GET_DATA(handle, config, struct fruit_config_data,
				return -1);

	if ((config->meta != FRUIT_META_NETATALK) ||
	    is_omit_timespec(&ft->create_time))
	{
		return SMB_VFS_NEXT_FNTIMES(handle, fsp, ft);
	}

	DBG_DEBUG("set btime for %s to %s", fsp_str_dbg(fsp),
		  time_to_asc(convert_timespec_to_time_t(ft->create_time)));

	ad = ad_fget(talloc_tos(), handle, fsp, ADOUBLE_META);
	if (ad == NULL) {
		goto exit;
	}

	ad_setdate(ad, AD_DATE_CREATE | AD_DATE_UNIX,
		   convert_time_t_to_uint32_t(ft->create_time.tv_sec));

	rc = ad_fset(handle, ad, fsp);

exit:

	TALLOC_FREE(ad);
	if (rc != 0) {
		DBG_WARNING("%s\n", fsp_str_dbg(fsp));
		return -1;
	}
	return SMB_VFS_NEXT_FNTIMES(handle, fsp, ft);
}

static int fruit_fallocate(struct vfs_handle_struct *handle,
			   struct files_struct *fsp,
			   uint32_t mode,
			   off_t offset,
			   off_t len)
{
	struct fio *fio = fruit_get_complete_fio(handle, fsp);

	if (fio == NULL) {
		return SMB_VFS_NEXT_FALLOCATE(handle, fsp, mode, offset, len);
	}

	/* Let the pwrite code path handle it. */
	errno = ENOSYS;
	return -1;
}

static int fruit_ftruncate_rsrc_xattr(struct vfs_handle_struct *handle,
				      struct files_struct *fsp,
				      off_t offset)
{
#ifdef HAVE_ATTROPEN
	return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, offset);
#endif
	return 0;
}

static int fruit_ftruncate_rsrc_adouble(struct vfs_handle_struct *handle,
					struct files_struct *fsp,
					off_t offset)
{
	struct fio *fio = fruit_get_complete_fio(handle, fsp);
	int rc;
	struct adouble *ad = NULL;
	off_t ad_off;

	if (fio == NULL || fio->ad_fsp == NULL) {
		DBG_ERR("fio/ad_fsp=NULL for [%s]\n", fsp_str_dbg(fsp));
		errno = EBADF;
		return -1;
	}

	ad = ad_fget(talloc_tos(), handle, fio->ad_fsp, ADOUBLE_RSRC);
	if (ad == NULL) {
		DBG_ERR("ad_fget [%s] failed [%s]\n",
			fsp_str_dbg(fio->ad_fsp), strerror(errno));
		return -1;
	}

	ad_off = ad_getentryoff(ad, ADEID_RFORK);

	rc = SMB_VFS_NEXT_FTRUNCATE(handle, fio->ad_fsp, offset + ad_off);
	if (rc != 0) {
		TALLOC_FREE(ad);
		return -1;
	}

	ad_setentrylen(ad, ADEID_RFORK, offset);

	rc = ad_fset(handle, ad, fio->ad_fsp);
	if (rc != 0) {
		DBG_ERR("ad_fset [%s] failed [%s]\n",
			fsp_str_dbg(fio->ad_fsp), strerror(errno));
		TALLOC_FREE(ad);
		return -1;
	}

	TALLOC_FREE(ad);
	return 0;
}

static int fruit_ftruncate_rsrc_stream(struct vfs_handle_struct *handle,
				       struct files_struct *fsp,
				       off_t offset)
{
	return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, offset);
}

static int fruit_ftruncate_rsrc(struct vfs_handle_struct *handle,
				struct files_struct *fsp,
				off_t offset)
{
	struct fio *fio = fruit_get_complete_fio(handle, fsp);
	int ret;

	if (fio == NULL) {
		DBG_ERR("Failed to fetch fsp extension\n");
		return -1;
	}

	switch (fio->config->rsrc) {
	case FRUIT_RSRC_XATTR:
		ret = fruit_ftruncate_rsrc_xattr(handle, fsp, offset);
		break;

	case FRUIT_RSRC_ADFILE:
		ret = fruit_ftruncate_rsrc_adouble(handle, fsp, offset);
		break;

	case FRUIT_RSRC_STREAM:
		ret = fruit_ftruncate_rsrc_stream(handle, fsp, offset);
		break;

	default:
		DBG_ERR("Unexpected rsrc config [%d]\n", fio->config->rsrc);
		return -1;
	}


	return ret;
}

static int fruit_ftruncate_meta(struct vfs_handle_struct *handle,
				struct files_struct *fsp,
				off_t offset)
{
	if (offset > 60) {
		DBG_WARNING("ftruncate %s to %jd\n",
			    fsp_str_dbg(fsp), (intmax_t)offset);
		/* OS X returns NT_STATUS_ALLOTTED_SPACE_EXCEEDED  */
		errno = EOVERFLOW;
		return -1;
	}

	/* OS X returns success but does nothing  */
	DBG_INFO("ignoring ftruncate %s to %jd\n",
		 fsp_str_dbg(fsp), (intmax_t)offset);
	return 0;
}

static int fruit_ftruncate(struct vfs_handle_struct *handle,
			   struct files_struct *fsp,
			   off_t offset)
{
	struct fio *fio = fruit_get_complete_fio(handle, fsp);
	int ret;

	DBG_DEBUG("Path [%s] offset [%"PRIdMAX"]\n", fsp_str_dbg(fsp),
		  (intmax_t)offset);

	if (fio == NULL) {
		return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, offset);
	}

	if (fio->type == ADOUBLE_META) {
		ret = fruit_ftruncate_meta(handle, fsp, offset);
	} else {
		ret = fruit_ftruncate_rsrc(handle, fsp, offset);
	}

	DBG_DEBUG("Path [%s] result [%d]\n", fsp_str_dbg(fsp), ret);
	return ret;
}

static NTSTATUS fruit_create_file(vfs_handle_struct *handle,
				  struct smb_request *req,
				  struct files_struct *dirfsp,
				  struct smb_filename *smb_fname,
				  uint32_t access_mask,
				  uint32_t share_access,
				  uint32_t create_disposition,
				  uint32_t create_options,
				  uint32_t file_attributes,
				  uint32_t oplock_request,
				  const struct smb2_lease *lease,
				  uint64_t allocation_size,
				  uint32_t private_flags,
				  struct security_descriptor *sd,
				  struct ea_list *ea_list,
				  files_struct **result,
				  int *pinfo,
				  const struct smb2_create_blobs *in_context_blobs,
				  struct smb2_create_blobs *out_context_blobs)
{
	NTSTATUS status;
	struct fruit_config_data *config = NULL;
	files_struct *fsp = NULL;
	bool internal_open = (oplock_request & INTERNAL_OPEN_ONLY);
	int ret;

	status = check_aapl(handle, req, in_context_blobs, out_context_blobs);
	if (!NT_STATUS_IS_OK(status)) {
		goto fail;
	}

	SMB_VFS_HANDLE_GET_DATA(handle, config, struct fruit_config_data,
				return NT_STATUS_UNSUCCESSFUL);

	if (is_apple_stream(smb_fname->stream_name) &&
	    !internal_open &&
	    config->convert_adouble)
	{
		uint32_t conv_flags  = 0;

		if (config->wipe_intentionally_left_blank_rfork) {
			conv_flags |= AD_CONV_WIPE_BLANK;
		}
		if (config->delete_empty_adfiles) {
			conv_flags |= AD_CONV_DELETE;
		}

		ret = ad_convert(handle,
				 smb_fname,
				 macos_string_replace_map,
				 conv_flags);
		if (ret != 0) {
			DBG_ERR("ad_convert(\"%s\") failed\n",
				smb_fname_str_dbg(smb_fname));
		}
	}

	status = SMB_VFS_NEXT_CREATE_FILE(
		handle, req, dirfsp, smb_fname,
		access_mask, share_access,
		create_disposition, create_options,
		file_attributes, oplock_request,
		lease,
		allocation_size, private_flags,
		sd, ea_list, result,
		pinfo, in_context_blobs, out_context_blobs);
	if (!NT_STATUS_IS_OK(status)) {
		return status;
	}

	fsp = *result;

	/*
	 * If this is a plain open for existing files, opening an 0
	 * byte size resource fork MUST fail with
	 * NT_STATUS_OBJECT_NAME_NOT_FOUND.
	 *
	 * Cf the vfs_fruit torture tests in test_rfork_create().
	 */
	if (global_fruit_config.nego_aapl &&
	    create_disposition == FILE_OPEN &&
	    smb_fname->st.st_ex_size == 0 &&
	    is_named_stream(smb_fname))
	{
		status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
		goto fail;
	}

	if (is_named_stream(smb_fname) || fsp->fsp_flags.is_directory) {
		return status;
	}

	if ((config->locking == FRUIT_LOCKING_NETATALK) &&
	    lp_locking(fsp->conn->params) &&
	    fsp->fsp_flags.can_lock &&
	    (fsp->op != NULL) &&
	    !fsp->fsp_flags.is_pathref)
	{
		struct check_access_state state = (struct check_access_state) {
			.fsp = fsp,
			.access_mask = access_mask,
			.share_mode = share_access,
		};

		status = share_mode_do_locked_brl(fsp,
						  fruit_check_access,
						  &state);
		if (!NT_STATUS_IS_OK(status)) {
			goto fail;
		}
		if (!NT_STATUS_IS_OK(state.status)) {
			status = state.status;
			goto fail;
		}
	}

	return status;

fail:
	DEBUG(10, ("fruit_create_file: %s\n", nt_errstr(status)));

	if (fsp) {
		close_file_free(req, &fsp, ERROR_CLOSE);
		*result = NULL;
	}

	return status;
}

static NTSTATUS fruit_freaddir_attr(struct vfs_handle_struct *handle,
				    struct files_struct *fsp,
				    TALLOC_CTX *mem_ctx,
				    struct readdir_attr_data **pattr_data)
{
	struct fruit_config_data *config = NULL;
	struct readdir_attr_data *attr_data;
	uint32_t conv_flags  = 0;
	NTSTATUS status;
	int ret;

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data,
				return NT_STATUS_UNSUCCESSFUL);

	if (!global_fruit_config.nego_aapl) {
		return SMB_VFS_NEXT_FREADDIR_ATTR(handle,
						  fsp,
						  mem_ctx,
						  pattr_data);
	}

	DBG_DEBUG("Path [%s]\n", fsp_str_dbg(fsp));

	if (config->convert_adouble) {
		if (config->wipe_intentionally_left_blank_rfork) {
			conv_flags |= AD_CONV_WIPE_BLANK;
		}
		if (config->delete_empty_adfiles) {
			conv_flags |= AD_CONV_DELETE;
		}

		ret = ad_convert(handle,
				 fsp->fsp_name,
				 macos_string_replace_map,
				 conv_flags);
		if (ret != 0) {
			DBG_ERR("ad_convert(\"%s\") failed\n",
				fsp_str_dbg(fsp));
		}
	}

	attr_data = talloc(mem_ctx, struct readdir_attr_data);
	if (attr_data == NULL) {
		return NT_STATUS_NO_MEMORY;
	}
	*attr_data = (struct readdir_attr_data){.type = RDATTR_AAPL};

	/*
	 * Mac metadata: compressed FinderInfo, resource fork length
	 * and creation date
	 */
	status = readdir_attr_macmeta(handle, fsp->fsp_name, attr_data);
	if (!NT_STATUS_IS_OK(status)) {
		/*
		 * Error handling is tricky: if we return failure from
		 * this function, the corresponding directory entry
		 * will to be passed to the client, so we really just
		 * want to error out on fatal errors.
		 */
		if  (!NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
			goto fail;
		}
	}

	/*
	 * UNIX mode
	 */
	if (config->unix_info_enabled) {
		attr_data->attr_data.aapl.unix_mode =
			fsp->fsp_name->st.st_ex_mode;
	}

	/*
	 * max_access
	 */
	if (!config->readdir_attr_max_access) {
		attr_data->attr_data.aapl.max_access = FILE_GENERIC_ALL;
	} else {
		status = smbd_calculate_access_mask_fsp(fsp->conn->cwd_fsp,
			fsp,
			false,
			false,
			SEC_FLAG_MAXIMUM_ALLOWED,
			&attr_data->attr_data.aapl.max_access);
		if (!NT_STATUS_IS_OK(status)) {
			goto fail;
		}
	}

	*pattr_data = attr_data;
	return NT_STATUS_OK;

fail:
	DBG_WARNING("Path [%s], error: %s\n", fsp_str_dbg(fsp),
		   nt_errstr(status));
	TALLOC_FREE(attr_data);
	return status;
}

static NTSTATUS fruit_fget_nt_acl(vfs_handle_struct *handle,
				  files_struct *fsp,
				  uint32_t security_info,
				  TALLOC_CTX *mem_ctx,
				  struct security_descriptor **ppdesc)
{
	NTSTATUS status;
	struct security_ace ace;
	struct dom_sid sid;
	struct fruit_config_data *config;

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data,
				return NT_STATUS_UNSUCCESSFUL);

	status = SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp, security_info,
					  mem_ctx, ppdesc);
	if (!NT_STATUS_IS_OK(status)) {
		return status;
	}

	/*
	 * Add MS NFS style ACEs with uid, gid and mode
	 */
	if (!global_fruit_config.nego_aapl) {
		return NT_STATUS_OK;
	}
	if (!config->unix_info_enabled) {
		return NT_STATUS_OK;
	}

	/* First remove any existing ACE's with NFS style mode/uid/gid SIDs. */
	status = remove_virtual_nfs_aces(*ppdesc);
	if (!NT_STATUS_IS_OK(status)) {
		DBG_WARNING("failed to remove MS NFS style ACEs\n");
		return status;
	}

	/* MS NFS style mode */
	sid_compose(&sid, &global_sid_Unix_NFS_Mode, fsp->fsp_name->st.st_ex_mode);
	init_sec_ace(&ace, &sid, SEC_ACE_TYPE_ACCESS_DENIED, 0, 0);
	status = security_descriptor_dacl_add(*ppdesc, &ace);
	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(1,("failed to add MS NFS style ACE\n"));
		return status;
	}

	/* MS NFS style uid */
	sid_compose(&sid, &global_sid_Unix_NFS_Users, fsp->fsp_name->st.st_ex_uid);
	init_sec_ace(&ace, &sid, SEC_ACE_TYPE_ACCESS_DENIED, 0, 0);
	status = security_descriptor_dacl_add(*ppdesc, &ace);
	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(1,("failed to add MS NFS style ACE\n"));
		return status;
	}

	/* MS NFS style gid */
	sid_compose(&sid, &global_sid_Unix_NFS_Groups, fsp->fsp_name->st.st_ex_gid);
	init_sec_ace(&ace, &sid, SEC_ACE_TYPE_ACCESS_DENIED, 0, 0);
	status = security_descriptor_dacl_add(*ppdesc, &ace);
	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(1,("failed to add MS NFS style ACE\n"));
		return status;
	}

	return NT_STATUS_OK;
}

static NTSTATUS fruit_fset_nt_acl(vfs_handle_struct *handle,
				  files_struct *fsp,
				  uint32_t security_info_sent,
				  const struct security_descriptor *orig_psd)
{
	struct fruit_config_data *config = NULL;
	NTSTATUS status;
	bool do_chmod;
	mode_t ms_nfs_mode = 0;
	int result;
	struct security_descriptor *psd = NULL;
	uint32_t orig_num_aces = 0;

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data,
				return NT_STATUS_UNSUCCESSFUL);

	if (orig_psd->dacl != NULL) {
		orig_num_aces = orig_psd->dacl->num_aces;
	}

	psd = security_descriptor_copy(talloc_tos(), orig_psd);
	if (psd == NULL) {
		return NT_STATUS_NO_MEMORY;
	}

	DBG_DEBUG("%s\n", fsp_str_dbg(fsp));

	if (config->ignore_zero_aces && (orig_num_aces == 0)) {
		/*
		 * Just ignore Set-ACL requests with zero ACEs.
		 */
		return NT_STATUS_OK;
	}

	status = check_ms_nfs(handle, fsp, psd, &ms_nfs_mode, &do_chmod);
	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(1, ("fruit_fset_nt_acl: check_ms_nfs failed%s\n", fsp_str_dbg(fsp)));
		TALLOC_FREE(psd);
		return status;
	}

	/*
	 * If only ms_nfs ACE entries were sent, ensure we set the DACL
	 * sent/present flags correctly now we've removed them.
	 */

	if (orig_num_aces != 0) {
		/*
		 * Are there any ACE's left ?
		 */
		if (psd->dacl->num_aces == 0) {
			/* No - clear the DACL sent/present flags. */
			security_info_sent &= ~SECINFO_DACL;
			psd->type &= ~SEC_DESC_DACL_PRESENT;
		}
	}

	status = SMB_VFS_NEXT_FSET_NT_ACL(handle, fsp, security_info_sent, psd);
	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(1, ("fruit_fset_nt_acl: SMB_VFS_NEXT_FSET_NT_ACL failed%s\n", fsp_str_dbg(fsp)));
		TALLOC_FREE(psd);
		return status;
	}

	if (do_chmod) {
		result = SMB_VFS_FCHMOD(fsp, ms_nfs_mode);
		if (result != 0) {
			DBG_WARNING("%s, result: %d, %04o error %s\n",
				fsp_str_dbg(fsp),
				result,
				(unsigned)ms_nfs_mode,
				strerror(errno));
			status = map_nt_error_from_unix(errno);
			TALLOC_FREE(psd);
			return status;
		}
	}

	TALLOC_FREE(psd);
	return NT_STATUS_OK;
}

static struct vfs_offload_ctx *fruit_offload_ctx;

struct fruit_offload_read_state {
	struct vfs_handle_struct *handle;
	struct tevent_context *ev;
	files_struct *fsp;
	uint32_t fsctl;
	uint32_t flags;
	uint64_t xferlen;
	DATA_BLOB token;
};

static void fruit_offload_read_done(struct tevent_req *subreq);

static struct tevent_req *fruit_offload_read_send(
	TALLOC_CTX *mem_ctx,
	struct tevent_context *ev,
	struct vfs_handle_struct *handle,
	files_struct *fsp,
	uint32_t fsctl,
	uint32_t ttl,
	off_t offset,
	size_t to_copy)
{
	struct tevent_req *req = NULL;
	struct tevent_req *subreq = NULL;
	struct fruit_offload_read_state *state = NULL;

	req = tevent_req_create(mem_ctx, &state,
				struct fruit_offload_read_state);
	if (req == NULL) {
		return NULL;
	}
	*state = (struct fruit_offload_read_state) {
		.handle = handle,
		.ev = ev,
		.fsp = fsp,
		.fsctl = fsctl,
	};

	subreq = SMB_VFS_NEXT_OFFLOAD_READ_SEND(mem_ctx, ev, handle, fsp,
						fsctl, ttl, offset, to_copy);
	if (tevent_req_nomem(subreq, req)) {
		return tevent_req_post(req, ev);
	}
	tevent_req_set_callback(subreq, fruit_offload_read_done, req);
	return req;
}

static void fruit_offload_read_done(struct tevent_req *subreq)
{
	struct tevent_req *req = tevent_req_callback_data(
		subreq, struct tevent_req);
	struct fruit_offload_read_state *state = tevent_req_data(
		req, struct fruit_offload_read_state);
	NTSTATUS status;

	status = SMB_VFS_NEXT_OFFLOAD_READ_RECV(subreq,
						state->handle,
						state,
						&state->flags,
						&state->xferlen,
						&state->token);
	TALLOC_FREE(subreq);
	if (tevent_req_nterror(req, status)) {
		return;
	}

	if (state->fsctl != FSCTL_SRV_REQUEST_RESUME_KEY) {
		tevent_req_done(req);
		return;
	}

	status = vfs_offload_token_ctx_init(state->fsp->conn->sconn->client,
					    &fruit_offload_ctx);
	if (tevent_req_nterror(req, status)) {
		return;
	}

	status = vfs_offload_token_db_store_fsp(fruit_offload_ctx,
						state->fsp,
						&state->token);
	if (tevent_req_nterror(req, status)) {
		return;
	}

	tevent_req_done(req);
	return;
}

static NTSTATUS fruit_offload_read_recv(struct tevent_req *req,
					struct vfs_handle_struct *handle,
					TALLOC_CTX *mem_ctx,
					uint32_t *flags,
					uint64_t *xferlen,
					DATA_BLOB *token)
{
	struct fruit_offload_read_state *state = tevent_req_data(
		req, struct fruit_offload_read_state);
	NTSTATUS status;

	if (tevent_req_is_nterror(req, &status)) {
		tevent_req_received(req);
		return status;
	}

	*flags = state->flags;
	*xferlen = state->xferlen;
	token->length = state->token.length;
	token->data = talloc_move(mem_ctx, &state->token.data);

	tevent_req_received(req);
	return NT_STATUS_OK;
}

struct fruit_offload_write_state {
	struct vfs_handle_struct *handle;
	off_t copied;
	struct files_struct *src_fsp;
	struct files_struct *dst_fsp;
	bool is_copyfile;
};

static void fruit_offload_write_done(struct tevent_req *subreq);
static struct tevent_req *fruit_offload_write_send(struct vfs_handle_struct *handle,
						TALLOC_CTX *mem_ctx,
						struct tevent_context *ev,
						uint32_t fsctl,
						DATA_BLOB *token,
						off_t transfer_offset,
						struct files_struct *dest_fsp,
						off_t dest_off,
						off_t num)
{
	struct tevent_req *req, *subreq;
	struct fruit_offload_write_state *state;
	NTSTATUS status;
	struct fruit_config_data *config;
	off_t src_off = transfer_offset;
	files_struct *src_fsp = NULL;
	off_t to_copy = num;
	bool copyfile_enabled = false;

	DEBUG(10,("soff: %ju, doff: %ju, len: %ju\n",
		  (uintmax_t)src_off, (uintmax_t)dest_off, (uintmax_t)num));

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data,
				return NULL);

	req = tevent_req_create(mem_ctx, &state,
				struct fruit_offload_write_state);
	if (req == NULL) {
		return NULL;
	}
	state->handle = handle;
	state->dst_fsp = dest_fsp;

	switch (fsctl) {
	case FSCTL_SRV_COPYCHUNK:
	case FSCTL_SRV_COPYCHUNK_WRITE:
		copyfile_enabled = config->copyfile_enabled;
		break;
	default:
		break;
	}

	/*
	 * Check if this a OS X copyfile style copychunk request with
	 * a requested chunk count of 0 that was translated to a
	 * offload_write_send VFS call overloading the parameters src_off
	 * = dest_off = num = 0.
	 */
	if (copyfile_enabled && num == 0 && src_off == 0 && dest_off == 0) {
		status = vfs_offload_token_db_fetch_fsp(
			fruit_offload_ctx, token, &src_fsp);
		if (tevent_req_nterror(req, status)) {
			return tevent_req_post(req, ev);
		}
		state->src_fsp = src_fsp;

		status = vfs_stat_fsp(src_fsp);
		if (tevent_req_nterror(req, status)) {
			return tevent_req_post(req, ev);
		}

		to_copy = src_fsp->fsp_name->st.st_ex_size;
		state->is_copyfile = true;
	}

	subreq = SMB_VFS_NEXT_OFFLOAD_WRITE_SEND(handle,
					      mem_ctx,
					      ev,
					      fsctl,
					      token,
					      transfer_offset,
					      dest_fsp,
					      dest_off,
					      to_copy);
	if (tevent_req_nomem(subreq, req)) {
		return tevent_req_post(req, ev);
	}

	tevent_req_set_callback(subreq, fruit_offload_write_done, req);
	return req;
}

static void fruit_offload_write_done(struct tevent_req *subreq)
{
	struct tevent_req *req = tevent_req_callback_data(
		subreq, struct tevent_req);
	struct fruit_offload_write_state *state = tevent_req_data(
		req, struct fruit_offload_write_state);
	NTSTATUS status;
	unsigned int num_streams = 0;
	struct stream_struct *streams = NULL;
	unsigned int i;
	struct smb_filename *src_fname = NULL;
	struct smb_filename *dst_fname = NULL;

	status = SMB_VFS_NEXT_OFFLOAD_WRITE_RECV(state->handle,
					      subreq,
					      &state->copied);
	TALLOC_FREE(subreq);
	if (tevent_req_nterror(req, status)) {
		return;
	}

	if (!state->is_copyfile) {
		tevent_req_done(req);
		return;
	}

	/*
	 * Now copy all remaining streams. We know the share supports
	 * streams, because we're in vfs_fruit. We don't do this async
	 * because streams are few and small.
	 */
	status = vfs_fstreaminfo(state->src_fsp,
				req, &num_streams, &streams);
	if (tevent_req_nterror(req, status)) {
		return;
	}

	if (num_streams == 1) {
		/* There is always one stream, ::$DATA. */
		tevent_req_done(req);
		return;
	}

	src_fname = state->src_fsp->fsp_name;
	dst_fname = state->dst_fsp->fsp_name;

	for (i = 0; i < num_streams; i++) {
		struct smb_filename *src_fname_tmp = NULL;
		struct smb_filename *dst_fname_tmp = NULL;
		const char *stream = streams[i].name;

		DBG_DEBUG("stream: '%s'/%zu\n",
			  stream,
			  (size_t)streams[i].size);

		src_fname_tmp = synthetic_smb_fname(streams,
						    src_fname->base_name,
						    stream,
						    NULL,
						    src_fname->twrp,
						    src_fname->flags);
		if (tevent_req_nomem(src_fname_tmp, req)) {
			TALLOC_FREE(streams);
			return;
		}

		if (is_ntfs_default_stream_smb_fname(src_fname_tmp)) {
			TALLOC_FREE(src_fname_tmp);
			continue;
		}

		dst_fname_tmp = synthetic_smb_fname(streams,
						    dst_fname->base_name,
						    stream,
						    NULL,
						    dst_fname->twrp,
						    dst_fname->flags);
		if (tevent_req_nomem(dst_fname_tmp, req)) {
			TALLOC_FREE(streams);
			return;
		}

		status = copy_file(streams,
				   state->handle->conn,
				   src_fname_tmp,
				   dst_fname_tmp,
				   FILE_CREATE);
		if (!NT_STATUS_IS_OK(status)) {
			DBG_WARNING("copy %s to %s failed: %s\n",
				    smb_fname_str_dbg(src_fname_tmp),
				    smb_fname_str_dbg(dst_fname_tmp),
				    nt_errstr(status));
			TALLOC_FREE(streams);
			tevent_req_nterror(req, status);
			return;
		}

		TALLOC_FREE(src_fname_tmp);
		TALLOC_FREE(dst_fname_tmp);
	}

	TALLOC_FREE(streams);
	tevent_req_done(req);
}

static NTSTATUS fruit_offload_write_recv(struct vfs_handle_struct *handle,
				      struct tevent_req *req,
				      off_t *copied)
{
	struct fruit_offload_write_state *state = tevent_req_data(
		req, struct fruit_offload_write_state);
	NTSTATUS status;

	if (tevent_req_is_nterror(req, &status)) {
		DEBUG(1, ("server side copy chunk failed: %s\n",
			  nt_errstr(status)));
		*copied = 0;
		tevent_req_received(req);
		return status;
	}

	*copied = state->copied;
	tevent_req_received(req);

	return NT_STATUS_OK;
}

static char *fruit_get_bandsize_line(char **lines, int numlines)
{
	static regex_t re;
	static bool re_initialized = false;
	int i;
	int ret;

	if (!re_initialized) {
		ret = regcomp(&re, "^[[:blank:]]*<key>band-size</key>$", 0);
		if (ret != 0) {
			return NULL;
		}
		re_initialized = true;
	}

	for (i = 0; i < numlines; i++) {
		regmatch_t matches[1];

		ret = regexec(&re, lines[i], 1, matches, 0);
		if (ret == 0) {
			/*
			 * Check if the match was on the last line, sa we want
			 * the subsequent line.
			 */
			if (i + 1 == numlines) {
				return NULL;
			}
			return lines[i + 1];
		}
		if (ret != REG_NOMATCH) {
			return NULL;
		}
	}

	return NULL;
}

static bool fruit_get_bandsize_from_line(char *line, size_t *_band_size)
{
	static regex_t re;
	static bool re_initialized = false;
	regmatch_t matches[2];
	uint64_t band_size;
	int ret;
	bool ok;

	if (!re_initialized) {
		ret = regcomp(&re,
			      "^[[:blank:]]*"
			      "<integer>\\([[:digit:]]*\\)</integer>$",
			      0);
		if (ret != 0) {
			return false;
		}
		re_initialized = true;
	}

	ret = regexec(&re, line, 2, matches, 0);
	if (ret != 0) {
		DBG_ERR("regex failed [%s]\n", line);
		return false;
	}

	line[matches[1].rm_eo] = '\0';

	ok = conv_str_u64(&line[matches[1].rm_so], &band_size);
	if (!ok) {
		return false;
	}
	*_band_size = (size_t)band_size;
	return true;
}

/*
 * This reads and parses an Info.plist from a TM sparsebundle looking for the
 * "band-size" key and value.
 */
static bool fruit_get_bandsize(vfs_handle_struct *handle,
			       const char *dir,
			       size_t *band_size)
{
#define INFO_PLIST_MAX_SIZE 64*1024
	char *plist = NULL;
	struct smb_filename *smb_fname = NULL;
	files_struct *fsp = NULL;
	uint8_t *file_data = NULL;
	char **lines = NULL;
	char *band_size_line = NULL;
	size_t plist_file_size;
	ssize_t nread;
	int numlines;
	int ret;
	bool ok = false;
	NTSTATUS status;

	plist = talloc_asprintf(talloc_tos(),
				"%s/%s/Info.plist",
				handle->conn->connectpath,
				dir);
	if (plist == NULL) {
		ok = false;
		goto out;
	}

	smb_fname = cp_smb_basename(talloc_tos(), plist);
	if (smb_fname == NULL) {
		ok = false;
		goto out;
	}

	ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
	if (ret != 0) {
		DBG_INFO("Ignoring Sparsebundle without Info.plist [%s]\n", dir);
		ok = true;
		goto out;
	}

	plist_file_size = smb_fname->st.st_ex_size;

	if (plist_file_size > INFO_PLIST_MAX_SIZE) {
		DBG_INFO("%s is too large, ignoring\n", plist);
		ok = true;
		goto out;
	}

	status = SMB_VFS_NEXT_CREATE_FILE(
		handle,				/* conn */
		NULL,				/* req */
		NULL,				/* dirfsp */
		smb_fname,			/* fname */
		FILE_GENERIC_READ,		/* access_mask */
		FILE_SHARE_READ | FILE_SHARE_WRITE, /* share_access */
		FILE_OPEN,			/* create_disposition */
		0,				/* create_options */
		0,				/* file_attributes */
		INTERNAL_OPEN_ONLY,		/* oplock_request */
		NULL,				/* lease */
		0,				/* allocation_size */
		0,				/* private_flags */
		NULL,				/* sd */
		NULL,				/* ea_list */
		&fsp,				/* result */
		NULL,				/* psbuf */
		NULL, NULL);			/* create context */
	if (!NT_STATUS_IS_OK(status)) {
		DBG_INFO("Opening [%s] failed [%s]\n",
			 smb_fname_str_dbg(smb_fname), nt_errstr(status));
		ok = false;
		goto out;
	}

	file_data = talloc_zero_array(talloc_tos(),
				      uint8_t,
				      plist_file_size + 1);
	if (file_data == NULL) {
		ok = false;
		goto out;
	}

	nread = SMB_VFS_NEXT_PREAD(handle, fsp, file_data, plist_file_size, 0);
	if ((nread < 0) || ((size_t)nread != plist_file_size)) {
		DBG_ERR("Short read on [%s]: %zu/%zd\n",
			fsp_str_dbg(fsp), nread, plist_file_size);
		ok = false;
		goto out;

	}

	status = close_file_free(NULL, &fsp, NORMAL_CLOSE);
	if (!NT_STATUS_IS_OK(status)) {
		DBG_ERR("close_file failed: %s\n", nt_errstr(status));
		ok = false;
		goto out;
	}

	lines = file_lines_parse((char *)file_data,
				 plist_file_size,
				 &numlines,
				 talloc_tos());
	if (lines == NULL) {
		ok = false;
		goto out;
	}

	band_size_line = fruit_get_bandsize_line(lines, numlines);
	if (band_size_line == NULL) {
		DBG_ERR("Didn't find band-size key in [%s]\n",
			smb_fname_str_dbg(smb_fname));
		ok = false;
		goto out;
	}

	ok = fruit_get_bandsize_from_line(band_size_line, band_size);
	if (!ok) {
		DBG_ERR("fruit_get_bandsize_from_line failed\n");
		goto out;
	}

	DBG_DEBUG("Parsed band-size [%zu] for [%s]\n", *band_size, plist);

out:
	if (fsp != NULL) {
		status = close_file_free(NULL, &fsp, NORMAL_CLOSE);
		if (!NT_STATUS_IS_OK(status)) {
			DBG_ERR("close_file failed: %s\n", nt_errstr(status));
		}
	}
	TALLOC_FREE(plist);
	TALLOC_FREE(smb_fname);
	TALLOC_FREE(file_data);
	TALLOC_FREE(lines);
	return ok;
}

struct fruit_disk_free_state {
	off_t total_size;
};

static bool fruit_get_num_bands(vfs_handle_struct *handle,
				const char *bundle,
				size_t *_nbands)
{
	char *path = NULL;
	struct smb_filename *bands_dir = NULL;
	struct smb_Dir *dir_hnd = NULL;
	const char *dname = NULL;
	char *talloced = NULL;
	size_t nbands;
	NTSTATUS status;

	path = talloc_asprintf(talloc_tos(),
			       "%s/%s/bands",
			       handle->conn->connectpath,
			       bundle);
	if (path == NULL) {
		return false;
	}

	bands_dir = cp_smb_basename(talloc_tos(), path);
	TALLOC_FREE(path);
	if (bands_dir == NULL) {
		return false;
	}

	status = OpenDir(talloc_tos(),
			 handle->conn,
			 bands_dir,
			 NULL,
			 0,
			 &dir_hnd);
	if (!NT_STATUS_IS_OK(status)) {
		TALLOC_FREE(bands_dir);
		errno = map_errno_from_nt_status(status);
		return false;
	}

	nbands = 0;

	while ((dname = ReadDirName(dir_hnd, &talloced)) != NULL) {
		if (ISDOT(dname) || ISDOTDOT(dname)) {
			continue;
		}
		nbands++;
	}
	TALLOC_FREE(dir_hnd);

	DBG_DEBUG("%zu bands in [%s]\n", nbands, smb_fname_str_dbg(bands_dir));

	TALLOC_FREE(bands_dir);

	*_nbands = nbands;
	return nbands > 0;
}

static bool fruit_tmsize_do_dirent(vfs_handle_struct *handle,
				   struct fruit_disk_free_state *state,
				   const char *name)
{
	bool ok;
	char *p = NULL;
	size_t sparsebundle_strlen = strlen("sparsebundle");
	size_t bandsize = 0;
	size_t nbands;
	off_t tm_size;

	p = strstr(name, "sparsebundle");
	if (p == NULL) {
		return true;
	}

	if (p[sparsebundle_strlen] != '\0') {
		return true;
	}

	DBG_DEBUG("Processing sparsebundle [%s]\n", name);

	ok = fruit_get_bandsize(handle, name, &bandsize);
	if (!ok) {
		/*
		 * Beware of race conditions: this may be an uninitialized
		 * Info.plist that a client is just creating. We don't want let
		 * this to trigger complete failure.
		 */
		DBG_ERR("Processing sparsebundle [%s] failed\n", name);
		return true;
	}

	ok = fruit_get_num_bands(handle, name, &nbands);
	if (!ok) {
		/*
		 * Beware of race conditions: this may be a backup sparsebundle
		 * in an early stage lacking a bands subdirectory. We don't want
		 * let this to trigger complete failure.
		 */
		DBG_ERR("Processing sparsebundle [%s] failed\n", name);
		return true;
	}

	tm_size = (off_t)bandsize * (off_t)nbands;
	if (tm_size / nbands != bandsize ||
	    state->total_size + tm_size < state->total_size)
	{
		DBG_ERR("tm size overflow: total_size [%jd]"
			" bandsize [%zu] nbands [%zu]\n",
			(intmax_t)state->total_size,
			bandsize,
			nbands);
		return false;
	}

	state->total_size += tm_size;

	DBG_DEBUG("[%s] tm_size [%jd] total_size [%jd]\n",
		  name, (intmax_t)tm_size, (intmax_t)state->total_size);

	return true;
}

/**
 * Calculate used size of a TimeMachine volume
 *
 * This assumes that the volume is used only for TimeMachine.
 *
 * - readdir(basedir of share), then
 * - for every element that matches regex "^\(.*\)\.sparsebundle$" :
 * - parse "\1.sparsebundle/Info.plist" and read the band-size XML key
 * - count band files in "\1.sparsebundle/bands/"
 * - calculate used size of all bands: band_count * band_size
 **/
static uint64_t fruit_disk_free(vfs_handle_struct *handle,
				const struct smb_filename *smb_fname,
				uint64_t *_bsize,
				uint64_t *_dfree,
				uint64_t *_dsize)
{
	struct fruit_config_data *config = NULL;
	struct fruit_disk_free_state state = {0};
	struct smb_Dir *dir_hnd = NULL;
	const char *dname = NULL;
	char *talloced = NULL;
	uint64_t dfree;
	uint64_t dsize;
	bool ok;
	NTSTATUS status;

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data,
				return UINT64_MAX);

	if (!config->time_machine ||
	    config->time_machine_max_size == 0)
	{
		return SMB_VFS_NEXT_DISK_FREE(handle,
					      smb_fname,
					      _bsize,
					      _dfree,
					      _dsize);
	}

	status = OpenDir(talloc_tos(),
			 handle->conn,
			 smb_fname,
			 NULL,
			 0,
			 &dir_hnd);
	if (!NT_STATUS_IS_OK(status)) {
		errno = map_errno_from_nt_status(status);
		return UINT64_MAX;
	}

	while ((dname = ReadDirName(dir_hnd, &talloced)) != NULL) {
		ok = fruit_tmsize_do_dirent(handle, &state, dname);
		if (!ok) {
			TALLOC_FREE(talloced);
			TALLOC_FREE(dir_hnd);
			return UINT64_MAX;
		}
		TALLOC_FREE(talloced);
	}

	TALLOC_FREE(dir_hnd);

	dsize = config->time_machine_max_size / 512;
	dfree = dsize - (state.total_size / 512);
	if (dfree > dsize) {
		dfree = 0;
	}

	*_bsize = 512;
	*_dsize = dsize;
	*_dfree = dfree;
	return dfree / 2;
}

static uint64_t fruit_fs_file_id(struct vfs_handle_struct *handle,
				 const SMB_STRUCT_STAT *psbuf)
{
	struct fruit_config_data *config = NULL;

	SMB_VFS_HANDLE_GET_DATA(handle, config,
				struct fruit_config_data,
				return 0);

	if (global_fruit_config.nego_aapl &&
	    config->aapl_zero_file_id)
	{
		return 0;
	}

	return SMB_VFS_NEXT_FS_FILE_ID(handle, psbuf);
}

static struct vfs_fn_pointers vfs_fruit_fns = {
	.connect_fn = fruit_connect,
	.disk_free_fn = fruit_disk_free,

	/* File operations */
	.fchmod_fn = fruit_fchmod,
	.unlinkat_fn = fruit_unlinkat,
	.renameat_fn = fruit_renameat,
	.openat_fn = fruit_openat,
	.close_fn = fruit_close,
	.pread_fn = fruit_pread,
	.pwrite_fn = fruit_pwrite,
	.pread_send_fn = fruit_pread_send,
	.pread_recv_fn = fruit_pread_recv,
	.pwrite_send_fn = fruit_pwrite_send,
	.pwrite_recv_fn = fruit_pwrite_recv,
	.fsync_send_fn = fruit_fsync_send,
	.fsync_recv_fn = fruit_fsync_recv,
	.stat_fn = fruit_stat,
	.lstat_fn = fruit_lstat,
	.fstatat_fn = fruit_fstatat,
	.fstat_fn = fruit_fstat,
	.fstreaminfo_fn = fruit_fstreaminfo,
	.fntimes_fn = fruit_fntimes,
	.ftruncate_fn = fruit_ftruncate,
	.fallocate_fn = fruit_fallocate,
	.create_file_fn = fruit_create_file,
	.freaddir_attr_fn = fruit_freaddir_attr,
	.offload_read_send_fn = fruit_offload_read_send,
	.offload_read_recv_fn = fruit_offload_read_recv,
	.offload_write_send_fn = fruit_offload_write_send,
	.offload_write_recv_fn = fruit_offload_write_recv,
	.fs_file_id_fn = fruit_fs_file_id,

	/* NT ACL operations */
	.fget_nt_acl_fn = fruit_fget_nt_acl,
	.fset_nt_acl_fn = fruit_fset_nt_acl,
};

static_decl_vfs;
NTSTATUS vfs_fruit_init(TALLOC_CTX *ctx)
{
	NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "fruit",
					&vfs_fruit_fns);
	if (!NT_STATUS_IS_OK(ret)) {
		return ret;
	}

	vfs_fruit_debug_level = debug_add_class("fruit");
	if (vfs_fruit_debug_level == -1) {
		vfs_fruit_debug_level = DBGC_VFS;
		DEBUG(0, ("%s: Couldn't register custom debugging class!\n",
			  "vfs_fruit_init"));
	} else {
		DEBUG(10, ("%s: Debug class number of '%s': %d\n",
			   "vfs_fruit_init","fruit",vfs_fruit_debug_level));
	}

	return ret;
}
