NTSTATUS dup_file_fsp(struct smb_request *req, files_struct *from,
uint32 access_mask, uint32 share_access,
uint32 create_options, files_struct *to)
{
/* this can never happen for print files */
SMB_ASSERT(from->print_file == NULL);
TALLOC_FREE(to->fh);
to->fh = from->fh;
to->fh->ref_count++;
to->file_id = from->file_id;
to->initial_allocation_size = from->initial_allocation_size;
to->file_pid = from->file_pid;
to->vuid = from->vuid;
to->open_time = from->open_time;
to->access_mask = access_mask;
to->share_access = share_access;
to->oplock_type = from->oplock_type;
to->can_lock = from->can_lock;
to->can_read = ((access_mask & FILE_READ_DATA) != 0);
to->can_write =
CAN_WRITE(from->conn) &&
((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0);
to->modified = from->modified;
to->is_directory = from->is_directory;
to->aio_write_behind = from->aio_write_behind;
return fsp_set_smb_fname(to, from->fsp_name);
}
NTSTATUS open_np_file(struct smb_request *smb_req, const char *name,
struct files_struct **pfsp)
{
struct connection_struct *conn = smb_req->conn;
struct files_struct *fsp;
struct smb_filename *smb_fname = NULL;
NTSTATUS status;
status = file_new(smb_req, conn, &fsp);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("file_new failed: %s\n", nt_errstr(status)));
return status;
}
fsp->conn = conn;
fsp->fh->fd = -1;
fsp->vuid = smb_req->vuid;
fsp->can_lock = false;
fsp->access_mask = FILE_READ_DATA | FILE_WRITE_DATA;
status = create_synthetic_smb_fname(talloc_tos(), name, NULL, NULL,
&smb_fname);
if (!NT_STATUS_IS_OK(status)) {
file_free(smb_req, fsp);
return status;
}
status = fsp_set_smb_fname(fsp, smb_fname);
TALLOC_FREE(smb_fname);
if (!NT_STATUS_IS_OK(status)) {
file_free(smb_req, fsp);
return status;
}
status = np_open(fsp, name,
conn->sconn->local_address,
conn->sconn->remote_address,
&conn->sconn->client_id,
conn->session_info,
conn->sconn->msg_ctx,
&fsp->fake_file_handle);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("np_open(%s) returned %s\n", name,
nt_errstr(status)));
file_free(smb_req, fsp);
return status;
}
*pfsp = fsp;
return NT_STATUS_OK;
}
NTSTATUS vfs_default_durable_reconnect(struct connection_struct *conn,
struct smb_request *smb1req,
struct smbXsrv_open *op,
const DATA_BLOB old_cookie,
TALLOC_CTX *mem_ctx,
files_struct **result,
DATA_BLOB *new_cookie)
{
struct share_mode_lock *lck;
struct share_mode_entry *e;
struct files_struct *fsp = NULL;
NTSTATUS status;
bool ok;
int ret;
int flags = 0;
struct file_id file_id;
struct smb_filename *smb_fname = NULL;
enum ndr_err_code ndr_err;
struct vfs_default_durable_cookie cookie;
DATA_BLOB new_cookie_blob = data_blob_null;
*result = NULL;
*new_cookie = data_blob_null;
if (!lp_durable_handles(SNUM(conn))) {
return NT_STATUS_NOT_SUPPORTED;
}
/*
* the checks for kernel oplocks
* and similar things are done
* in the vfs_default_durable_cookie()
* call below.
*/
ZERO_STRUCT(cookie);
ndr_err = ndr_pull_struct_blob(&old_cookie, talloc_tos(), &cookie,
(ndr_pull_flags_fn_t)ndr_pull_vfs_default_durable_cookie);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
status = ndr_map_error2ntstatus(ndr_err);
return status;
}
if (strcmp(cookie.magic, VFS_DEFAULT_DURABLE_COOKIE_MAGIC) != 0) {
return NT_STATUS_INVALID_PARAMETER;
}
if (cookie.version != VFS_DEFAULT_DURABLE_COOKIE_VERSION) {
return NT_STATUS_INVALID_PARAMETER;
}
if (!cookie.allow_reconnect) {
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
if (strcmp(cookie.servicepath, conn->connectpath) != 0) {
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
/* Create an smb_filename with stream_name == NULL. */
smb_fname = synthetic_smb_fname(talloc_tos(), cookie.base_name,
NULL, NULL);
if (smb_fname == NULL) {
return NT_STATUS_NO_MEMORY;
}
ret = SMB_VFS_LSTAT(conn, smb_fname);
if (ret == -1) {
status = map_nt_error_from_unix_common(errno);
DEBUG(1, ("Unable to lstat stream: %s => %s\n",
smb_fname_str_dbg(smb_fname),
nt_errstr(status)));
return status;
}
if (!S_ISREG(smb_fname->st.st_ex_mode)) {
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
if (!file_id_equal(&cookie.id, &file_id)) {
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
/*
* 1. check entry in locking.tdb
*/
lck = get_existing_share_mode_lock(mem_ctx, file_id);
if (lck == NULL) {
DEBUG(5, ("vfs_default_durable_reconnect: share-mode lock "
"not obtained from db\n"));
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
if (lck->data->num_share_modes == 0) {
DEBUG(1, ("vfs_default_durable_reconnect: Error: no share-mode "
"entry in existing share mode lock\n"));
TALLOC_FREE(lck);
return NT_STATUS_INTERNAL_DB_ERROR;
}
if (lck->data->num_share_modes > 1) {
/*
* It can't be durable if there is more than one handle
* on the file.
*/
DEBUG(5, ("vfs_default_durable_reconnect: more than one "
"share-mode entry - can not be durable\n"));
TALLOC_FREE(lck);
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
e = &lck->data->share_modes[0];
if (!server_id_is_disconnected(&e->pid)) {
DEBUG(5, ("vfs_default_durable_reconnect: denying durable "
"reconnect for handle that was not marked "
"disconnected (e.g. smbd or cluster node died)\n"));
TALLOC_FREE(lck);
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
if (e->share_file_id != op->global->open_persistent_id) {
DEBUG(5, ("vfs_default_durable_reconnect: denying durable "
"share_file_id changed %llu != %llu"
"(e.g. another client had opened the file)\n",
(unsigned long long)e->share_file_id,
(unsigned long long)op->global->open_persistent_id));
TALLOC_FREE(lck);
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
if ((e->access_mask & (FILE_WRITE_DATA|FILE_APPEND_DATA)) &&
!CAN_WRITE(conn))
{
DEBUG(5, ("vfs_default_durable_reconnect: denying durable "
"share[%s] is not writeable anymore\n",
lp_servicename(talloc_tos(), SNUM(conn))));
TALLOC_FREE(lck);
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
/*
* 2. proceed with opening file
*/
status = fsp_new(conn, conn, &fsp);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("vfs_default_durable_reconnect: failed to create "
"new fsp: %s\n", nt_errstr(status)));
TALLOC_FREE(lck);
return status;
}
fsp->fh->private_options = e->private_options;
fsp->fh->gen_id = smbXsrv_open_hash(op);
fsp->file_id = file_id;
fsp->file_pid = smb1req->smbpid;
fsp->vuid = smb1req->vuid;
fsp->open_time = e->time;
fsp->access_mask = e->access_mask;
fsp->share_access = e->share_access;
fsp->can_read = ((fsp->access_mask & (FILE_READ_DATA)) != 0);
fsp->can_write = ((fsp->access_mask & (FILE_WRITE_DATA|FILE_APPEND_DATA)) != 0);
fsp->fnum = op->local_id;
/*
* TODO:
* Do we need to store the modified flag in the DB?
*/
fsp->modified = false;
/*
* no durables for directories
*/
fsp->is_directory = false;
/*
* For normal files, can_lock == !is_directory
*/
fsp->can_lock = true;
/*
* We do not support aio write behind for smb2
*/
fsp->aio_write_behind = false;
fsp->oplock_type = e->op_type;
fsp->initial_allocation_size = cookie.initial_allocation_size;
fsp->fh->position_information = cookie.position_information;
fsp->update_write_time_triggered = cookie.update_write_time_triggered;
fsp->update_write_time_on_close = cookie.update_write_time_on_close;
fsp->write_time_forced = cookie.write_time_forced;
fsp->close_write_time = cookie.close_write_time;
status = fsp_set_smb_fname(fsp, smb_fname);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(lck);
fsp_free(fsp);
DEBUG(0, ("vfs_default_durable_reconnect: "
"fsp_set_smb_fname failed: %s\n",
nt_errstr(status)));
return status;
}
op->compat = fsp;
fsp->op = op;
e->pid = messaging_server_id(conn->sconn->msg_ctx);
e->op_mid = smb1req->mid;
e->share_file_id = fsp->fh->gen_id;
ok = brl_reconnect_disconnected(fsp);
if (!ok) {
status = NT_STATUS_INTERNAL_ERROR;
DEBUG(1, ("vfs_default_durable_reconnect: "
"failed to reopen brlocks: %s\n",
nt_errstr(status)));
TALLOC_FREE(lck);
op->compat = NULL;
fsp_free(fsp);
return status;
}
/*
* TODO: properly calculate open flags
*/
if (fsp->can_write && fsp->can_read) {
flags = O_RDWR;
} else if (fsp->can_write) {
flags = O_WRONLY;
} else if (fsp->can_read) {
flags = O_RDONLY;
}
status = fd_open(conn, fsp, flags, 0 /* mode */);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(lck);
DEBUG(1, ("vfs_default_durable_reconnect: failed to open "
"file: %s\n", nt_errstr(status)));
op->compat = NULL;
fsp_free(fsp);
return status;
}
/*
* We now check the stat info stored in the cookie against
* the current stat data from the file we just opened.
* If any detail differs, we deny the durable reconnect,
* because in that case it is very likely that someone
* opened the file while the handle was disconnected,
* which has to be interpreted as an oplock break.
*/
ret = SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st);
if (ret == -1) {
status = map_nt_error_from_unix_common(errno);
DEBUG(1, ("Unable to fstat stream: %s => %s\n",
smb_fname_str_dbg(smb_fname),
nt_errstr(status)));
ret = SMB_VFS_CLOSE(fsp);
if (ret == -1) {
DEBUG(0, ("vfs_default_durable_reconnect: "
"SMB_VFS_CLOSE failed (%s) - leaking file "
"descriptor\n", strerror(errno)));
}
TALLOC_FREE(lck);
op->compat = NULL;
fsp_free(fsp);
return status;
}
if (!S_ISREG(fsp->fsp_name->st.st_ex_mode)) {
ret = SMB_VFS_CLOSE(fsp);
if (ret == -1) {
DEBUG(0, ("vfs_default_durable_reconnect: "
"SMB_VFS_CLOSE failed (%s) - leaking file "
"descriptor\n", strerror(errno)));
}
TALLOC_FREE(lck);
op->compat = NULL;
fsp_free(fsp);
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
file_id = vfs_file_id_from_sbuf(conn, &fsp->fsp_name->st);
if (!file_id_equal(&cookie.id, &file_id)) {
ret = SMB_VFS_CLOSE(fsp);
if (ret == -1) {
DEBUG(0, ("vfs_default_durable_reconnect: "
"SMB_VFS_CLOSE failed (%s) - leaking file "
"descriptor\n", strerror(errno)));
}
TALLOC_FREE(lck);
op->compat = NULL;
fsp_free(fsp);
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
ok = vfs_default_durable_reconnect_check_stat(&cookie.stat_info,
&fsp->fsp_name->st,
fsp_str_dbg(fsp));
if (!ok) {
ret = SMB_VFS_CLOSE(fsp);
if (ret == -1) {
DEBUG(0, ("vfs_default_durable_reconnect: "
"SMB_VFS_CLOSE failed (%s) - leaking file "
"descriptor\n", strerror(errno)));
}
TALLOC_FREE(lck);
op->compat = NULL;
fsp_free(fsp);
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
status = set_file_oplock(fsp);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("vfs_default_durable_reconnect failed to set oplock "
"after opening file: %s\n", nt_errstr(status)));
ret = SMB_VFS_CLOSE(fsp);
if (ret == -1) {
DEBUG(0, ("vfs_default_durable_reconnect: "
"SMB_VFS_CLOSE failed (%s) - leaking file "
"descriptor\n", strerror(errno)));
}
TALLOC_FREE(lck);
op->compat = NULL;
fsp_free(fsp);
return status;
}
status = vfs_default_durable_cookie(fsp, mem_ctx, &new_cookie_blob);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(lck);
DEBUG(1, ("vfs_default_durable_reconnect: "
"vfs_default_durable_cookie - %s\n",
nt_errstr(status)));
op->compat = NULL;
fsp_free(fsp);
return status;
}
smb1req->chain_fsp = fsp;
smb1req->smb2req->compat_chain_fsp = fsp;
DEBUG(10, ("vfs_default_durable_reconnect: opened file '%s'\n",
fsp_str_dbg(fsp)));
/*
* release the sharemode lock: this writes the changes
*/
lck->data->modified = true;
TALLOC_FREE(lck);
*result = fsp;
*new_cookie = new_cookie_blob;
return NT_STATUS_OK;
}
