files_struct *file_find_dif(struct smbd_server_connection *sconn,
struct file_id id, unsigned long gen_id)
{
int count=0;
files_struct *fsp;
if (gen_id == 0) {
return NULL;
}
for (fsp=sconn->files; fsp; fsp=fsp->next,count++) {
/* We can have a fsp->fh->fd == -1 here as it could be a stat open. */
if (file_id_equal(&fsp->file_id, &id) &&
fsp->fh->gen_id == gen_id ) {
if (count > 10) {
DLIST_PROMOTE(sconn->files, fsp);
}
/* Paranoia check. */
if ((fsp->fh->fd == -1) &&
(fsp->oplock_type != NO_OPLOCK)) {
DEBUG(0,("file_find_dif: file %s file_id = "
"%s, gen = %u oplock_type = %u is a "
"stat open with oplock type !\n",
fsp_str_dbg(fsp),
file_id_string_tos(&fsp->file_id),
(unsigned int)fsp->fh->gen_id,
(unsigned int)fsp->oplock_type ));
smb_panic("file_find_dif");
}
return fsp;
}
}
return NULL;
}
files_struct *file_find_di_next(files_struct *start_fsp)
{
files_struct *fsp;
for (fsp = start_fsp->next;fsp;fsp=fsp->next) {
if (file_id_equal(&fsp->file_id, &start_fsp->file_id)) {
return fsp;
}
}
return NULL;
}
static bool share_modes_identical(struct share_mode_entry *e1,
struct share_mode_entry *e2)
{
/* We used to check for e1->share_access == e2->share_access here
as well as the other fields but 2 different DOS or FCB opens
sharing the same share mode entry may validly differ in
fsp->share_access field. */
return (serverid_equal(&e1->pid, &e2->pid) &&
file_id_equal(&e1->id, &e2->id) &&
e1->share_file_id == e2->share_file_id );
}
files_struct *file_find_di_first(struct smbd_server_connection *sconn,
struct file_id id)
{
files_struct *fsp;
if (file_id_equal(&sconn->fsp_fi_cache.id, &id)) {
/* Positive or negative cache hit. */
return sconn->fsp_fi_cache.fsp;
}
sconn->fsp_fi_cache.id = id;
for (fsp=sconn->files;fsp;fsp=fsp->next) {
if (file_id_equal(&fsp->file_id, &id)) {
/* Setup positive cache. */
sconn->fsp_fi_cache.fsp = fsp;
return fsp;
}
}
/* Setup negative cache. */
sconn->fsp_fi_cache.fsp = NULL;
return NULL;
}
struct share_mode_lock *get_share_mode_lock(
TALLOC_CTX *mem_ctx,
struct file_id id,
const char *servicepath,
const struct smb_filename *smb_fname,
const struct timespec *old_write_time)
{
struct share_mode_lock *lck;
lck = talloc(mem_ctx, struct share_mode_lock);
if (lck == NULL) {
DEBUG(1, ("talloc failed\n"));
return NULL;
}
if (the_lock == NULL) {
the_lock = get_share_mode_lock_internal(
lck, id, servicepath, smb_fname, old_write_time);
if (the_lock == NULL) {
goto fail;
}
talloc_set_destructor(the_lock, the_lock_destructor);
the_lock_id = id;
} else {
if (!file_id_equal(&the_lock_id, &id)) {
DEBUG(1, ("Can not lock two share modes "
"simultaneously\n"));
goto fail;
}
if (talloc_reference(lck, the_lock) == NULL) {
DEBUG(1, ("talloc_reference failed\n"));
goto fail;
}
}
lck->data = the_lock->data;
return lck;
fail:
TALLOC_FREE(lck);
return NULL;
}
static NTSTATUS close_remove_share_mode(files_struct *fsp,
enum file_close_type close_type)
{
connection_struct *conn = fsp->conn;
struct server_id self = messaging_server_id(conn->sconn->msg_ctx);
bool delete_file = false;
bool changed_user = false;
struct share_mode_lock *lck = NULL;
NTSTATUS status = NT_STATUS_OK;
NTSTATUS tmp_status;
struct file_id id;
const struct security_unix_token *del_token = NULL;
const struct security_token *del_nt_token = NULL;
bool got_tokens = false;
bool normal_close;
int ret_flock, retries = 1;
/* Ensure any pending write time updates are done. */
if (fsp->update_write_time_event) {
update_write_time_handler(fsp->conn->sconn->ev_ctx,
fsp->update_write_time_event,
timeval_current(),
(void *)fsp);
}
/*
* Lock the share entries, and determine if we should delete
* on close. If so delete whilst the lock is still in effect.
* This prevents race conditions with the file being created. JRA.
*/
lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
if (lck == NULL) {
DEBUG(0, ("close_remove_share_mode: Could not get share mode "
"lock for file %s\n", fsp_str_dbg(fsp)));
return NT_STATUS_INVALID_PARAMETER;
}
if (fsp->write_time_forced) {
DEBUG(10,("close_remove_share_mode: write time forced "
"for file %s\n",
fsp_str_dbg(fsp)));
set_close_write_time(fsp, lck->data->changed_write_time);
} else if (fsp->update_write_time_on_close) {
/* Someone had a pending write. */
if (null_timespec(fsp->close_write_time)) {
DEBUG(10,("close_remove_share_mode: update to current time "
"for file %s\n",
fsp_str_dbg(fsp)));
/* Update to current time due to "normal" write. */
set_close_write_time(fsp, timespec_current());
} else {
DEBUG(10,("close_remove_share_mode: write time pending "
"for file %s\n",
fsp_str_dbg(fsp)));
/* Update to time set on close call. */
set_close_write_time(fsp, fsp->close_write_time);
}
}
if (fsp->initial_delete_on_close &&
!is_delete_on_close_set(lck, fsp->name_hash)) {
bool became_user = False;
/* Initial delete on close was set and no one else
* wrote a real delete on close. */
if (get_current_vuid(conn) != fsp->vuid) {
become_user(conn, fsp->vuid);
became_user = True;
}
fsp->delete_on_close = true;
set_delete_on_close_lck(fsp, lck,
get_current_nttok(conn),
get_current_utok(conn));
if (became_user) {
unbecome_user();
}
}
delete_file = is_delete_on_close_set(lck, fsp->name_hash);
if (delete_file) {
int i;
/* See if others still have the file open via this pathname.
If this is the case, then don't delete. If all opens are
POSIX delete now. */
for (i=0; i<lck->data->num_share_modes; i++) {
struct share_mode_entry *e = &lck->data->share_modes[i];
if (!is_valid_share_mode_entry(e)) {
continue;
}
if (e->name_hash != fsp->name_hash) {
continue;
}
if ((fsp->posix_flags & FSP_POSIX_FLAGS_OPEN)
&& (e->flags & SHARE_MODE_FLAG_POSIX_OPEN)) {
continue;
}
if (serverid_equal(&self, &e->pid) &&
(e->share_file_id == fsp->fh->gen_id)) {
continue;
}
if (share_mode_stale_pid(lck->data, i)) {
continue;
}
delete_file = False;
break;
}
}
/*
* NT can set delete_on_close of the last open
* reference to a file.
*/
normal_close = (close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE);
if (!normal_close || !delete_file) {
status = NT_STATUS_OK;
goto done;
}
/*
* Ok, we have to delete the file
*/
DEBUG(5,("close_remove_share_mode: file %s. Delete on close was set "
"- deleting file.\n", fsp_str_dbg(fsp)));
/*
* Don't try to update the write time when we delete the file
*/
fsp->update_write_time_on_close = false;
got_tokens = get_delete_on_close_token(lck, fsp->name_hash,
&del_nt_token, &del_token);
SMB_ASSERT(got_tokens);
if (!unix_token_equal(del_token, get_current_utok(conn))) {
/* Become the user who requested the delete. */
DEBUG(5,("close_remove_share_mode: file %s. "
"Change user to uid %u\n",
fsp_str_dbg(fsp),
(unsigned int)del_token->uid));
if (!push_sec_ctx()) {
smb_panic("close_remove_share_mode: file %s. failed to push "
"sec_ctx.\n");
}
set_sec_ctx(del_token->uid,
del_token->gid,
del_token->ngroups,
del_token->groups,
del_nt_token);
changed_user = true;
}
/* We can only delete the file if the name we have is still valid and
hasn't been renamed. */
tmp_status = vfs_stat_fsp(fsp);
if (!NT_STATUS_IS_OK(tmp_status)) {
DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
"was set and stat failed with error %s\n",
fsp_str_dbg(fsp), nt_errstr(tmp_status)));
/*
* Don't save the errno here, we ignore this error
*/
goto done;
}
id = vfs_file_id_from_sbuf(conn, &fsp->fsp_name->st);
if (!file_id_equal(&fsp->file_id, &id)) {
DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
"was set and dev and/or inode does not match\n",
fsp_str_dbg(fsp)));
DEBUG(5,("close_remove_share_mode: file %s. stored file_id %s, "
"stat file_id %s\n",
fsp_str_dbg(fsp),
file_id_string_tos(&fsp->file_id),
file_id_string_tos(&id)));
/*
* Don't save the errno here, we ignore this error
*/
goto done;
}
if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
&& !is_ntfs_stream_smb_fname(fsp->fsp_name)) {
status = delete_all_streams(conn, fsp->fsp_name->base_name);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(5, ("delete_all_streams failed: %s\n",
nt_errstr(status)));
goto done;
}
}
retry_delete:
/* temporary files with delete on close set will not be deleted on a
* cifs share using a netapp backend since they are opened with
* read + write access mask.
* close the file to allow the delete.
*/
if (fsp->can_write && !S_ISDIR(fsp->fsp_name->st.st_ex_mode) &&
fsp->fh->ref_count == 1 && retries) {
status = fd_close(fsp);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(3, ("close_remove_share_mode: Error %s closing %s\n",
nt_errstr(status),
smb_fname_str_dbg(fsp->fsp_name)));
goto skip_retry;
}
if (SMB_VFS_UNLINK(conn, fsp->fsp_name) != 0) {
/*
* This call can potentially fail as another smbd may
* have had the file open with delete on close set and
* deleted it when its last reference to this file
* went away. Hence we log this but not at debug level
* zero.
*/
DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
"was set and unlink failed with error %s\n",
fsp_str_dbg(fsp), strerror(errno)));
status = map_nt_error_from_unix(errno);
retries = 0;
goto retry_delete;
}
} else {
if (SMB_VFS_UNLINK(conn, fsp->fsp_name) != 0) {
/*
* This call can potentially fail as another smbd may
* have had the file open with delete on close set and
* deleted it when its last reference to this file
* went away. Hence we log this but not at debug level
* zero.
*/
DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
"was set and unlink failed with error %s\n",
fsp_str_dbg(fsp), strerror(errno)));
status = map_nt_error_from_unix(errno);
}
}
/* As we now have POSIX opens which can unlink
* with other open files we may have taken
* this code path with more than one share mode
* entry - ensure we only delete once by resetting
* the delete on close flag. JRA.
*/
skip_retry:
fsp->delete_on_close = false;
reset_delete_on_close_lck(fsp, lck);
done:
if (changed_user) {
/* unbecome user. */
pop_sec_ctx();
}
/* remove filesystem sharemodes */
ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, 0, 0);
if (ret_flock == -1) {
DEBUG(2, ("close_remove_share_mode: removing kernel flock for "
"%s failed: %s\n", fsp_str_dbg(fsp),
strerror(errno)));
}
if (!del_share_mode(lck, fsp)) {
DEBUG(0, ("close_remove_share_mode: Could not delete share "
"entry for file %s\n", fsp_str_dbg(fsp)));
}
TALLOC_FREE(lck);
if (delete_file) {
/*
* Do the notification after we released the share
* mode lock. Inside notify_fname we take out another
* tdb lock. With ctdb also accessing our databases,
* this can lead to deadlocks. Putting this notify
* after the TALLOC_FREE(lck) above we avoid locking
* two records simultaneously. Notifies are async and
* informational only, so calling the notify_fname
* without holding the share mode lock should not do
* any harm.
*/
notify_fname(conn, NOTIFY_ACTION_REMOVED,
FILE_NOTIFY_CHANGE_FILE_NAME,
fsp->fsp_name->base_name);
}
return status;
}
static NTSTATUS close_remove_share_mode(files_struct *fsp,
enum file_close_type close_type)
{
connection_struct *conn = fsp->conn;
bool delete_file = false;
bool changed_user = false;
struct share_mode_lock *lck = NULL;
NTSTATUS status = NT_STATUS_OK;
NTSTATUS tmp_status;
struct file_id id;
/* Ensure any pending write time updates are done. */
if (fsp->update_write_time_event) {
update_write_time_handler(smbd_event_context(),
fsp->update_write_time_event,
timeval_current(),
(void *)fsp);
}
/*
* Lock the share entries, and determine if we should delete
* on close. If so delete whilst the lock is still in effect.
* This prevents race conditions with the file being created. JRA.
*/
lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL,
NULL);
if (lck == NULL) {
DEBUG(0, ("close_remove_share_mode: Could not get share mode "
"lock for file %s\n", fsp_str_dbg(fsp)));
status = NT_STATUS_INVALID_PARAMETER;
goto done;
}
if (fsp->write_time_forced) {
DEBUG(10,("close_remove_share_mode: write time forced "
"for file %s\n",
fsp_str_dbg(fsp)));
set_close_write_time(fsp, lck->changed_write_time);
} else if (fsp->update_write_time_on_close) {
/* Someone had a pending write. */
if (null_timespec(fsp->close_write_time)) {
DEBUG(10,("close_remove_share_mode: update to current time "
"for file %s\n",
fsp_str_dbg(fsp)));
/* Update to current time due to "normal" write. */
set_close_write_time(fsp, timespec_current());
} else {
DEBUG(10,("close_remove_share_mode: write time pending "
"for file %s\n",
fsp_str_dbg(fsp)));
/* Update to time set on close call. */
set_close_write_time(fsp, fsp->close_write_time);
}
}
if (!del_share_mode(lck, fsp)) {
DEBUG(0, ("close_remove_share_mode: Could not delete share "
"entry for file %s\n",
fsp_str_dbg(fsp)));
}
if (fsp->initial_delete_on_close && (lck->delete_token == NULL)) {
bool became_user = False;
/* Initial delete on close was set and no one else
* wrote a real delete on close. */
if (current_user.vuid != fsp->vuid) {
become_user(conn, fsp->vuid);
became_user = True;
}
fsp->delete_on_close = true;
set_delete_on_close_lck(lck, True, ¤t_user.ut);
if (became_user) {
unbecome_user();
}
}
delete_file = lck->delete_on_close;
if (delete_file) {
int i;
/* See if others still have the file open. If this is the
* case, then don't delete. If all opens are POSIX delete now. */
for (i=0; i<lck->num_share_modes; i++) {
struct share_mode_entry *e = &lck->share_modes[i];
if (is_valid_share_mode_entry(e)) {
if (fsp->posix_open && (e->flags & SHARE_MODE_FLAG_POSIX_OPEN)) {
continue;
}
delete_file = False;
break;
}
}
}
/* Notify any deferred opens waiting on this close. */
notify_deferred_opens(lck);
reply_to_oplock_break_requests(fsp);
/*
* NT can set delete_on_close of the last open
* reference to a file.
*/
if (!(close_type == NORMAL_CLOSE || close_type == SHUTDOWN_CLOSE)
|| !delete_file
|| (lck->delete_token == NULL)) {
TALLOC_FREE(lck);
return NT_STATUS_OK;
}
/*
* Ok, we have to delete the file
*/
DEBUG(5,("close_remove_share_mode: file %s. Delete on close was set "
"- deleting file.\n", fsp_str_dbg(fsp)));
/*
* Don't try to update the write time when we delete the file
*/
fsp->update_write_time_on_close = false;
if (!unix_token_equal(lck->delete_token, ¤t_user.ut)) {
/* Become the user who requested the delete. */
DEBUG(5,("close_remove_share_mode: file %s. "
"Change user to uid %u\n",
fsp_str_dbg(fsp),
(unsigned int)lck->delete_token->uid));
if (!push_sec_ctx()) {
smb_panic("close_remove_share_mode: file %s. failed to push "
"sec_ctx.\n");
}
set_sec_ctx(lck->delete_token->uid,
lck->delete_token->gid,
lck->delete_token->ngroups,
lck->delete_token->groups,
NULL);
changed_user = true;
}
/* We can only delete the file if the name we have is still valid and
hasn't been renamed. */
tmp_status = vfs_stat_fsp(fsp);
if (!NT_STATUS_IS_OK(tmp_status)) {
DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
"was set and stat failed with error %s\n",
fsp_str_dbg(fsp), nt_errstr(tmp_status)));
/*
* Don't save the errno here, we ignore this error
*/
goto done;
}
id = vfs_file_id_from_sbuf(conn, &fsp->fsp_name->st);
if (!file_id_equal(&fsp->file_id, &id)) {
DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
"was set and dev and/or inode does not match\n",
fsp_str_dbg(fsp)));
DEBUG(5,("close_remove_share_mode: file %s. stored file_id %s, "
"stat file_id %s\n",
fsp_str_dbg(fsp),
file_id_string_tos(&fsp->file_id),
file_id_string_tos(&id)));
/*
* Don't save the errno here, we ignore this error
*/
goto done;
}
if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
&& !is_ntfs_stream_smb_fname(fsp->fsp_name)) {
status = delete_all_streams(conn, fsp->fsp_name->base_name);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(5, ("delete_all_streams failed: %s\n",
nt_errstr(status)));
goto done;
}
}
if (SMB_VFS_UNLINK(conn, fsp->fsp_name) != 0) {
/*
* This call can potentially fail as another smbd may
* have had the file open with delete on close set and
* deleted it when its last reference to this file
* went away. Hence we log this but not at debug level
* zero.
*/
DEBUG(5,("close_remove_share_mode: file %s. Delete on close "
"was set and unlink failed with error %s\n",
fsp_str_dbg(fsp), strerror(errno)));
status = map_nt_error_from_unix(errno);
}
notify_fname(conn, NOTIFY_ACTION_REMOVED,
FILE_NOTIFY_CHANGE_FILE_NAME,
fsp->fsp_name->base_name);
/* As we now have POSIX opens which can unlink
* with other open files we may have taken
* this code path with more than one share mode
* entry - ensure we only delete once by resetting
* the delete on close flag. JRA.
*/
fsp->delete_on_close = false;
set_delete_on_close_lck(lck, False, NULL);
done:
if (changed_user) {
/* unbecome user. */
pop_sec_ctx();
}
TALLOC_FREE(lck);
return status;
}
NTSTATUS leases_db_add(const struct GUID *client_guid,
const struct smb2_lease_key *lease_key,
const struct file_id *id,
const char *servicepath,
const char *base_name,
const char *stream_name)
{
TDB_DATA db_key, db_value;
DATA_BLOB blob;
struct db_record *rec;
NTSTATUS status;
bool ok;
struct leases_db_value new_value;
struct leases_db_file new_file;
struct leases_db_value *value = NULL;
enum ndr_err_code ndr_err;
if (!leases_db_init(false)) {
return NT_STATUS_INTERNAL_ERROR;
}
ok = leases_db_key(talloc_tos(), client_guid, lease_key, &db_key);
if (!ok) {
DEBUG(10, ("%s: leases_db_key failed\n", __func__));
return NT_STATUS_NO_MEMORY;
}
rec = dbwrap_fetch_locked(leases_db, talloc_tos(), db_key);
TALLOC_FREE(db_key.dptr);
if (rec == NULL) {
return NT_STATUS_INTERNAL_ERROR;
}
db_value = dbwrap_record_get_value(rec);
if (db_value.dsize != 0) {
uint32_t i;
DEBUG(10, ("%s: record exists\n", __func__));
value = talloc(talloc_tos(), struct leases_db_value);
if (value == NULL) {
status = NT_STATUS_NO_MEMORY;
goto out;
}
blob.data = db_value.dptr;
blob.length = db_value.dsize;
ndr_err = ndr_pull_struct_blob_all(
&blob, value, value,
(ndr_pull_flags_fn_t)ndr_pull_leases_db_value);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
DEBUG(10, ("%s: ndr_pull_struct_blob_failed: %s\n",
__func__, ndr_errstr(ndr_err)));
status = ndr_map_error2ntstatus(ndr_err);
goto out;
}
/* id must be unique. */
for (i = 0; i < value->num_files; i++) {
if (file_id_equal(id, &value->files[i].id)) {
status = NT_STATUS_OBJECT_NAME_COLLISION;
goto out;
}
}
value->files = talloc_realloc(value, value->files,
struct leases_db_file,
value->num_files + 1);
if (value->files == NULL) {
status = NT_STATUS_NO_MEMORY;
goto out;
}
value->files[value->num_files].id = *id;
value->files[value->num_files].servicepath = servicepath;
value->files[value->num_files].base_name = base_name;
value->files[value->num_files].stream_name = stream_name;
value->num_files += 1;
} else {
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;
}
NTSTATUS vfs_default_durable_disconnect(struct files_struct *fsp,
const DATA_BLOB old_cookie,
TALLOC_CTX *mem_ctx,
DATA_BLOB *new_cookie)
{
struct connection_struct *conn = fsp->conn;
NTSTATUS status;
enum ndr_err_code ndr_err;
struct vfs_default_durable_cookie cookie;
DATA_BLOB new_cookie_blob = data_blob_null;
struct share_mode_lock *lck;
bool ok;
*new_cookie = data_blob_null;
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 (!file_id_equal(&fsp->file_id, &cookie.id)) {
return NT_STATUS_INVALID_PARAMETER;
}
if (!BATCH_OPLOCK_TYPE(fsp->oplock_type)) {
return NT_STATUS_NOT_SUPPORTED;
}
/*
* For now let it be simple and do not keep
* delete on close files durable open
*/
if (fsp->initial_delete_on_close) {
return NT_STATUS_NOT_SUPPORTED;
}
if (fsp->delete_on_close) {
return NT_STATUS_NOT_SUPPORTED;
}
if (!VALID_STAT(fsp->fsp_name->st)) {
return NT_STATUS_NOT_SUPPORTED;
}
if (!S_ISREG(fsp->fsp_name->st.st_ex_mode)) {
return NT_STATUS_NOT_SUPPORTED;
}
/* Ensure any pending write time updates are done. */
if (fsp->update_write_time_event) {
update_write_time_handler(fsp->conn->sconn->ev_ctx,
fsp->update_write_time_event,
timeval_current(),
(void *)fsp);
}
/*
* The above checks are done in mark_share_mode_disconnected() too
* but we want to avoid getting the lock if possible
*/
lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
if (lck != NULL) {
struct smb_file_time ft;
ZERO_STRUCT(ft);
if (fsp->write_time_forced) {
ft.mtime = lck->data->changed_write_time;
} else if (fsp->update_write_time_on_close) {
if (null_timespec(fsp->close_write_time)) {
ft.mtime = timespec_current();
} else {
ft.mtime = fsp->close_write_time;
}
}
if (!null_timespec(ft.mtime)) {
round_timespec(conn->ts_res, &ft.mtime);
file_ntimes(conn, fsp->fsp_name, &ft);
}
ok = mark_share_mode_disconnected(lck, fsp);
if (!ok) {
TALLOC_FREE(lck);
}
}
if (lck != NULL) {
ok = brl_mark_disconnected(fsp);
if (!ok) {
TALLOC_FREE(lck);
}
}
if (lck == NULL) {
return NT_STATUS_NOT_SUPPORTED;
}
TALLOC_FREE(lck);
status = vfs_stat_fsp(fsp);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
ZERO_STRUCT(cookie);
cookie.allow_reconnect = true;
cookie.id = fsp->file_id;
cookie.servicepath = conn->connectpath;
cookie.base_name = fsp->fsp_name->base_name;
cookie.initial_allocation_size = fsp->initial_allocation_size;
cookie.position_information = fsp->fh->position_information;
cookie.update_write_time_triggered = fsp->update_write_time_triggered;
cookie.update_write_time_on_close = fsp->update_write_time_on_close;
cookie.write_time_forced = fsp->write_time_forced;
cookie.close_write_time = fsp->close_write_time;
cookie.stat_info.st_ex_dev = fsp->fsp_name->st.st_ex_dev;
cookie.stat_info.st_ex_ino = fsp->fsp_name->st.st_ex_ino;
cookie.stat_info.st_ex_mode = fsp->fsp_name->st.st_ex_mode;
cookie.stat_info.st_ex_nlink = fsp->fsp_name->st.st_ex_nlink;
cookie.stat_info.st_ex_uid = fsp->fsp_name->st.st_ex_uid;
cookie.stat_info.st_ex_gid = fsp->fsp_name->st.st_ex_gid;
cookie.stat_info.st_ex_rdev = fsp->fsp_name->st.st_ex_rdev;
cookie.stat_info.st_ex_size = fsp->fsp_name->st.st_ex_size;
cookie.stat_info.st_ex_atime = fsp->fsp_name->st.st_ex_atime;
cookie.stat_info.st_ex_mtime = fsp->fsp_name->st.st_ex_mtime;
cookie.stat_info.st_ex_ctime = fsp->fsp_name->st.st_ex_ctime;
cookie.stat_info.st_ex_btime = fsp->fsp_name->st.st_ex_btime;
cookie.stat_info.st_ex_calculated_birthtime = fsp->fsp_name->st.st_ex_calculated_birthtime;
cookie.stat_info.st_ex_blksize = fsp->fsp_name->st.st_ex_blksize;
cookie.stat_info.st_ex_blocks = fsp->fsp_name->st.st_ex_blocks;
cookie.stat_info.st_ex_flags = fsp->fsp_name->st.st_ex_flags;
cookie.stat_info.st_ex_mask = fsp->fsp_name->st.st_ex_mask;
ndr_err = ndr_push_struct_blob(&new_cookie_blob, mem_ctx, &cookie,
(ndr_push_flags_fn_t)ndr_push_vfs_default_durable_cookie);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
status = ndr_map_error2ntstatus(ndr_err);
return status;
}
status = fd_close(fsp);
if (!NT_STATUS_IS_OK(status)) {
data_blob_free(&new_cookie_blob);
return status;
}
*new_cookie = new_cookie_blob;
return NT_STATUS_OK;
}
