/*
open a file
*/
static NTSTATUS cvfs_open(struct ntvfs_module_context *ntvfs,
struct ntvfs_request *req, union smb_open *io)
{
struct cvfs_private *p = ntvfs->private_data;
struct smbcli_request *c_req;
struct ntvfs_handle *h;
struct cvfs_file *f;
NTSTATUS status;
SETUP_PID;
if (io->generic.level != RAW_OPEN_GENERIC &&
p->map_generic) {
return ntvfs_map_open(ntvfs, req, io);
}
status = ntvfs_handle_new(ntvfs, req, &h);
NT_STATUS_NOT_OK_RETURN(status);
f = talloc_zero(h, struct cvfs_file);
NT_STATUS_HAVE_NO_MEMORY(f);
f->h = h;
if (!(req->async_states->state & NTVFS_ASYNC_STATE_MAY_ASYNC)) {
union smb_handle *file;
status = smb_raw_open(p->tree, req, io);
NT_STATUS_NOT_OK_RETURN(status);
SMB_OPEN_OUT_FILE(io, file);
f->fnum = file->fnum;
file->ntvfs = NULL;
status = ntvfs_handle_set_backend_data(f->h, p->ntvfs, f);
NT_STATUS_NOT_OK_RETURN(status);
file->ntvfs = f->h;
DLIST_ADD(p->files, f);
return NT_STATUS_OK;
}
c_req = smb_raw_open_send(p->tree, io);
ASYNC_RECV_TAIL_F(io, async_open, f);
}
/*
a handler for async open replies
*/
static void async_open(struct smbcli_request *c_req)
{
struct async_info *async = c_req->async.private_data;
struct cvfs_private *cvfs = async->cvfs;
struct ntvfs_request *req = async->req;
struct cvfs_file *f = async->f;
union smb_open *io = async->parms;
union smb_handle *file;
talloc_free(async);
req->async_states->status = smb_raw_open_recv(c_req, req, io);
SMB_OPEN_OUT_FILE(io, file);
f->fnum = file->fnum;
file->ntvfs = NULL;
if (!NT_STATUS_IS_OK(req->async_states->status)) goto failed;
req->async_states->status = ntvfs_handle_set_backend_data(f->h, cvfs->ntvfs, f);
if (!NT_STATUS_IS_OK(req->async_states->status)) goto failed;
file->ntvfs = f->h;
DLIST_ADD(cvfs->files, f);
failed:
req->async_states->send_fn(req);
}
/*
open a file
*/
static NTSTATUS svfs_open(struct ntvfs_module_context *ntvfs,
struct ntvfs_request *req, union smb_open *io)
{
struct svfs_private *p = ntvfs->private_data;
char *unix_path;
struct stat st;
int fd, flags;
struct svfs_file *f;
int create_flags, rdwr_flags;
bool readonly;
NTSTATUS status;
struct ntvfs_handle *handle;
if (io->generic.level != RAW_OPEN_GENERIC) {
return ntvfs_map_open(ntvfs, req, io);
}
readonly = share_bool_option(ntvfs->ctx->config, SHARE_READONLY, SHARE_READONLY_DEFAULT);
if (readonly) {
create_flags = 0;
rdwr_flags = O_RDONLY;
} else {
create_flags = O_CREAT;
rdwr_flags = O_RDWR;
}
unix_path = svfs_unix_path(ntvfs, req, io->ntcreatex.in.fname);
switch (io->generic.in.open_disposition) {
case NTCREATEX_DISP_SUPERSEDE:
case NTCREATEX_DISP_OVERWRITE_IF:
flags = create_flags | O_TRUNC;
break;
case NTCREATEX_DISP_OPEN:
case NTCREATEX_DISP_OVERWRITE:
flags = 0;
break;
case NTCREATEX_DISP_CREATE:
flags = create_flags | O_EXCL;
break;
case NTCREATEX_DISP_OPEN_IF:
flags = create_flags;
break;
default:
flags = 0;
break;
}
flags |= rdwr_flags;
if (io->generic.in.create_options & NTCREATEX_OPTIONS_DIRECTORY) {
flags = O_RDONLY | O_DIRECTORY;
if (readonly) {
goto do_open;
}
switch (io->generic.in.open_disposition) {
case NTCREATEX_DISP_CREATE:
if (mkdir(unix_path, 0755) == -1) {
DEBUG(9,("svfs_open: mkdir %s errno=%d\n", unix_path, errno));
return map_nt_error_from_unix(errno);
}
break;
case NTCREATEX_DISP_OPEN_IF:
if (mkdir(unix_path, 0755) == -1 && errno != EEXIST) {
DEBUG(9,("svfs_open: mkdir %s errno=%d\n", unix_path, errno));
return map_nt_error_from_unix(errno);
}
break;
}
}
do_open:
fd = open(unix_path, flags, 0644);
if (fd == -1) {
return map_nt_error_from_unix(errno);
}
if (fstat(fd, &st) == -1) {
DEBUG(9,("svfs_open: fstat errno=%d\n", errno));
close(fd);
return map_nt_error_from_unix(errno);
}
status = ntvfs_handle_new(ntvfs, req, &handle);
NT_STATUS_NOT_OK_RETURN(status);
f = talloc(handle, struct svfs_file);
NT_STATUS_HAVE_NO_MEMORY(f);
f->fd = fd;
f->name = talloc_strdup(f, unix_path);
NT_STATUS_HAVE_NO_MEMORY(f->name);
DLIST_ADD(p->open_files, f);
status = ntvfs_handle_set_backend_data(handle, ntvfs, f);
NT_STATUS_NOT_OK_RETURN(status);
ZERO_STRUCT(io->generic.out);
unix_to_nt_time(&io->generic.out.create_time, st.st_ctime);
unix_to_nt_time(&io->generic.out.access_time, st.st_atime);
unix_to_nt_time(&io->generic.out.write_time, st.st_mtime);
unix_to_nt_time(&io->generic.out.change_time, st.st_mtime);
io->generic.out.file.ntvfs = handle;
io->generic.out.alloc_size = st.st_size;
io->generic.out.size = st.st_size;
io->generic.out.attrib = svfs_unix_to_dos_attrib(st.st_mode);
io->generic.out.is_directory = S_ISDIR(st.st_mode) ? 1 : 0;
return NT_STATUS_OK;
}
/*
create a new file
*/
static NTSTATUS pvfs_create_file(struct pvfs_state *pvfs,
struct ntvfs_request *req,
struct pvfs_filename *name,
union smb_open *io)
{
struct pvfs_file *f;
NTSTATUS status;
struct ntvfs_handle *h;
int flags, fd;
struct odb_lock *lck;
uint32_t create_options = io->generic.in.create_options;
uint32_t share_access = io->generic.in.share_access;
uint32_t access_mask = io->generic.in.access_mask;
mode_t mode;
uint32_t attrib;
BOOL del_on_close;
struct pvfs_filename *parent;
uint32_t oplock_level = OPLOCK_NONE, oplock_granted;
if ((io->ntcreatex.in.file_attr & FILE_ATTRIBUTE_READONLY) &&
(create_options & NTCREATEX_OPTIONS_DELETE_ON_CLOSE)) {
return NT_STATUS_CANNOT_DELETE;
}
status = pvfs_access_check_create(pvfs, req, name, &access_mask);
NT_STATUS_NOT_OK_RETURN(status);
/* check that the parent isn't opened with delete on close set */
status = pvfs_resolve_parent(pvfs, req, name, &parent);
if (NT_STATUS_IS_OK(status)) {
DATA_BLOB locking_key;
status = pvfs_locking_key(parent, req, &locking_key);
NT_STATUS_NOT_OK_RETURN(status);
status = odb_get_delete_on_close(pvfs->odb_context, &locking_key,
&del_on_close, NULL, NULL);
NT_STATUS_NOT_OK_RETURN(status);
if (del_on_close) {
return NT_STATUS_DELETE_PENDING;
}
}
if (access_mask & (SEC_FILE_WRITE_DATA | SEC_FILE_APPEND_DATA)) {
flags = O_RDWR;
} else {
flags = O_RDONLY;
}
status = ntvfs_handle_new(pvfs->ntvfs, req, &h);
NT_STATUS_NOT_OK_RETURN(status);
f = talloc(h, struct pvfs_file);
NT_STATUS_HAVE_NO_MEMORY(f);
f->handle = talloc(f, struct pvfs_file_handle);
NT_STATUS_HAVE_NO_MEMORY(f->handle);
attrib = io->ntcreatex.in.file_attr | FILE_ATTRIBUTE_ARCHIVE;
mode = pvfs_fileperms(pvfs, attrib);
/* create the file */
fd = open(name->full_name, flags | O_CREAT | O_EXCL, mode);
if (fd == -1) {
return pvfs_map_errno(pvfs, errno);
}
pvfs_xattr_unlink_hook(pvfs, name->full_name);
/* if this was a stream create then create the stream as well */
if (name->stream_name) {
status = pvfs_stream_create(pvfs, name, fd);
if (!NT_STATUS_IS_OK(status)) {
close(fd);
return status;
}
}
/* re-resolve the open fd */
status = pvfs_resolve_name_fd(pvfs, fd, name);
if (!NT_STATUS_IS_OK(status)) {
close(fd);
return status;
}
name->dos.attrib = attrib;
status = pvfs_dosattrib_save(pvfs, name, fd);
if (!NT_STATUS_IS_OK(status)) {
goto cleanup_delete;
}
status = pvfs_open_setup_eas_acl(pvfs, req, name, fd, f, io);
if (!NT_STATUS_IS_OK(status)) {
goto cleanup_delete;
}
/* form the lock context used for byte range locking and
opendb locking */
status = pvfs_locking_key(name, f->handle, &f->handle->odb_locking_key);
if (!NT_STATUS_IS_OK(status)) {
goto cleanup_delete;
}
status = pvfs_brl_locking_handle(f, name, h, &f->brl_handle);
if (!NT_STATUS_IS_OK(status)) {
goto cleanup_delete;
}
/* grab a lock on the open file record */
lck = odb_lock(req, pvfs->odb_context, &f->handle->odb_locking_key);
if (lck == NULL) {
DEBUG(0,("pvfs_open: failed to lock file '%s' in opendb\n",
name->full_name));
/* we were supposed to do a blocking lock, so something
is badly wrong! */
status = NT_STATUS_INTERNAL_DB_CORRUPTION;
goto cleanup_delete;
}
if (create_options & NTCREATEX_OPTIONS_DELETE_ON_CLOSE) {
del_on_close = True;
} else {
del_on_close = False;
}
if (pvfs->flags & PVFS_FLAG_FAKE_OPLOCKS) {
oplock_level = OPLOCK_NONE;
} else if (io->ntcreatex.in.flags & NTCREATEX_FLAGS_REQUEST_BATCH_OPLOCK) {
oplock_level = OPLOCK_BATCH;
} else if (io->ntcreatex.in.flags & NTCREATEX_FLAGS_REQUEST_OPLOCK) {
oplock_level = OPLOCK_EXCLUSIVE;
}
status = odb_open_file(lck, f->handle, name->stream_id,
share_access, access_mask, del_on_close,
name->full_name, oplock_level, &oplock_granted);
talloc_free(lck);
if (!NT_STATUS_IS_OK(status)) {
/* bad news, we must have hit a race - we don't delete the file
here as the most likely scenario is that someone else created
the file at the same time */
close(fd);
return status;
}
if (pvfs->flags & PVFS_FLAG_FAKE_OPLOCKS) {
oplock_granted = OPLOCK_BATCH;
}
f->ntvfs = h;
f->pvfs = pvfs;
f->pending_list = NULL;
f->lock_count = 0;
f->share_access = io->generic.in.share_access;
f->access_mask = access_mask;
f->impersonation = io->generic.in.impersonation;
f->notify_buffer = NULL;
f->search = NULL;
f->handle->pvfs = pvfs;
f->handle->name = talloc_steal(f->handle, name);
f->handle->fd = fd;
f->handle->create_options = io->generic.in.create_options;
f->handle->seek_offset = 0;
f->handle->position = 0;
f->handle->mode = 0;
f->handle->have_opendb_entry = True;
f->handle->sticky_write_time = False;
DLIST_ADD(pvfs->files.list, f);
/* setup a destructor to avoid file descriptor leaks on
abnormal termination */
talloc_set_destructor(f, pvfs_fnum_destructor);
talloc_set_destructor(f->handle, pvfs_handle_destructor);
io->generic.out.oplock_level = oplock_granted;
io->generic.out.file.ntvfs = f->ntvfs;
io->generic.out.create_action = NTCREATEX_ACTION_CREATED;
io->generic.out.create_time = name->dos.create_time;
io->generic.out.access_time = name->dos.access_time;
io->generic.out.write_time = name->dos.write_time;
io->generic.out.change_time = name->dos.change_time;
io->generic.out.attrib = name->dos.attrib;
io->generic.out.alloc_size = name->dos.alloc_size;
io->generic.out.size = name->st.st_size;
io->generic.out.file_type = FILE_TYPE_DISK;
io->generic.out.ipc_state = 0;
io->generic.out.is_directory = 0;
/* success - keep the file handle */
status = ntvfs_handle_set_backend_data(h, pvfs->ntvfs, f);
if (!NT_STATUS_IS_OK(status)) {
goto cleanup_delete;
}
notify_trigger(pvfs->notify_context,
NOTIFY_ACTION_ADDED,
FILE_NOTIFY_CHANGE_FILE_NAME,
name->full_name);
return NT_STATUS_OK;
cleanup_delete:
close(fd);
unlink(name->full_name);
return status;
}
/*
open a directory
*/
static NTSTATUS pvfs_open_directory(struct pvfs_state *pvfs,
struct ntvfs_request *req,
struct pvfs_filename *name,
union smb_open *io)
{
struct pvfs_file *f;
struct ntvfs_handle *h;
NTSTATUS status;
uint32_t create_action;
uint32_t access_mask = io->generic.in.access_mask;
struct odb_lock *lck;
BOOL del_on_close;
uint32_t create_options;
uint32_t share_access;
create_options = io->generic.in.create_options;
share_access = io->generic.in.share_access;
if (name->stream_name) {
return NT_STATUS_NOT_A_DIRECTORY;
}
/* if the client says it must be a directory, and it isn't,
then fail */
if (name->exists && !(name->dos.attrib & FILE_ATTRIBUTE_DIRECTORY)) {
return NT_STATUS_NOT_A_DIRECTORY;
}
switch (io->generic.in.open_disposition) {
case NTCREATEX_DISP_OPEN_IF:
break;
case NTCREATEX_DISP_OPEN:
if (!name->exists) {
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
break;
case NTCREATEX_DISP_CREATE:
if (name->exists) {
return NT_STATUS_OBJECT_NAME_COLLISION;
}
break;
case NTCREATEX_DISP_OVERWRITE_IF:
case NTCREATEX_DISP_OVERWRITE:
case NTCREATEX_DISP_SUPERSEDE:
default:
return NT_STATUS_INVALID_PARAMETER;
}
status = ntvfs_handle_new(pvfs->ntvfs, req, &h);
NT_STATUS_NOT_OK_RETURN(status);
f = talloc(h, struct pvfs_file);
if (f == NULL) {
return NT_STATUS_NO_MEMORY;
}
f->handle = talloc(f, struct pvfs_file_handle);
if (f->handle == NULL) {
return NT_STATUS_NO_MEMORY;
}
if (name->exists) {
/* check the security descriptor */
status = pvfs_access_check(pvfs, req, name, &access_mask);
} else {
status = pvfs_access_check_create(pvfs, req, name, &access_mask);
}
if (!NT_STATUS_IS_OK(status)) {
return status;
}
f->ntvfs = h;
f->pvfs = pvfs;
f->pending_list = NULL;
f->lock_count = 0;
f->share_access = io->generic.in.share_access;
f->impersonation = io->generic.in.impersonation;
f->access_mask = access_mask;
f->brl_handle = NULL;
f->notify_buffer = NULL;
f->search = NULL;
f->handle->pvfs = pvfs;
f->handle->name = talloc_steal(f->handle, name);
f->handle->fd = -1;
f->handle->odb_locking_key = data_blob(NULL, 0);
f->handle->create_options = io->generic.in.create_options;
f->handle->seek_offset = 0;
f->handle->position = 0;
f->handle->mode = 0;
f->handle->sticky_write_time = False;
if ((create_options & NTCREATEX_OPTIONS_DELETE_ON_CLOSE) &&
pvfs_directory_empty(pvfs, f->handle->name)) {
del_on_close = True;
} else {
del_on_close = False;
}
if (name->exists) {
/* form the lock context used for opendb locking */
status = pvfs_locking_key(name, f->handle, &f->handle->odb_locking_key);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
/* get a lock on this file before the actual open */
lck = odb_lock(req, pvfs->odb_context, &f->handle->odb_locking_key);
if (lck == NULL) {
DEBUG(0,("pvfs_open: failed to lock file '%s' in opendb\n",
name->full_name));
/* we were supposed to do a blocking lock, so something
is badly wrong! */
return NT_STATUS_INTERNAL_DB_CORRUPTION;
}
/* see if we are allowed to open at the same time as existing opens */
status = odb_open_file(lck, f->handle, f->handle->name->stream_id,
share_access, access_mask, del_on_close,
name->full_name, OPLOCK_NONE, NULL);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(lck);
return status;
}
f->handle->have_opendb_entry = True;
}
DLIST_ADD(pvfs->files.list, f);
/* setup destructors to avoid leaks on abnormal termination */
talloc_set_destructor(f->handle, pvfs_dir_handle_destructor);
talloc_set_destructor(f, pvfs_dir_fnum_destructor);
if (!name->exists) {
uint32_t attrib = io->generic.in.file_attr | FILE_ATTRIBUTE_DIRECTORY;
mode_t mode = pvfs_fileperms(pvfs, attrib);
if (mkdir(name->full_name, mode) == -1) {
return pvfs_map_errno(pvfs,errno);
}
pvfs_xattr_unlink_hook(pvfs, name->full_name);
status = pvfs_resolve_name(pvfs, req, io->ntcreatex.in.fname, 0, &name);
if (!NT_STATUS_IS_OK(status)) {
goto cleanup_delete;
}
status = pvfs_open_setup_eas_acl(pvfs, req, name, -1, f, io);
if (!NT_STATUS_IS_OK(status)) {
goto cleanup_delete;
}
/* form the lock context used for opendb locking */
status = pvfs_locking_key(name, f->handle, &f->handle->odb_locking_key);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
lck = odb_lock(req, pvfs->odb_context, &f->handle->odb_locking_key);
if (lck == NULL) {
DEBUG(0,("pvfs_open: failed to lock file '%s' in opendb\n",
name->full_name));
/* we were supposed to do a blocking lock, so something
is badly wrong! */
return NT_STATUS_INTERNAL_DB_CORRUPTION;
}
status = odb_open_file(lck, f->handle, f->handle->name->stream_id,
share_access, access_mask, del_on_close,
name->full_name, OPLOCK_NONE, NULL);
if (!NT_STATUS_IS_OK(status)) {
goto cleanup_delete;
}
f->handle->have_opendb_entry = True;
create_action = NTCREATEX_ACTION_CREATED;
notify_trigger(pvfs->notify_context,
NOTIFY_ACTION_ADDED,
FILE_NOTIFY_CHANGE_DIR_NAME,
name->full_name);
} else {
create_action = NTCREATEX_ACTION_EXISTED;
}
if (!name->exists) {
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
/* the open succeeded, keep this handle permanently */
status = ntvfs_handle_set_backend_data(h, pvfs->ntvfs, f);
if (!NT_STATUS_IS_OK(status)) {
goto cleanup_delete;
}
io->generic.out.oplock_level = OPLOCK_NONE;
io->generic.out.file.ntvfs = h;
io->generic.out.create_action = create_action;
io->generic.out.create_time = name->dos.create_time;
io->generic.out.access_time = name->dos.access_time;
io->generic.out.write_time = name->dos.write_time;
io->generic.out.change_time = name->dos.change_time;
io->generic.out.attrib = name->dos.attrib;
io->generic.out.alloc_size = name->dos.alloc_size;
io->generic.out.size = name->st.st_size;
io->generic.out.file_type = FILE_TYPE_DISK;
io->generic.out.ipc_state = 0;
io->generic.out.is_directory = 1;
return NT_STATUS_OK;
cleanup_delete:
rmdir(name->full_name);
return status;
}
