169 void fsg_lun_close(struct fsg_lun *curlun)  in fsg_lun_close()  argument
171 	if (curlun->filp) {  in fsg_lun_close()
172 		LDBG(curlun, "close backing file\n");  in fsg_lun_close()
173 		fput(curlun->filp);  in fsg_lun_close()
174 		curlun->filp = NULL;  in fsg_lun_close()
179 int fsg_lun_open(struct fsg_lun *curlun, const char *filename)  in fsg_lun_open()  argument
192 	ro = curlun->initially_ro;  in fsg_lun_open()
201 		LINFO(curlun, "unable to open backing file: %s\n", filename);  in fsg_lun_open()
210 		LINFO(curlun, "invalid file type: %s\n", filename);  in fsg_lun_open()
219 		LINFO(curlun, "file not readable: %s\n", filename);  in fsg_lun_open()
227 		LINFO(curlun, "unable to find file size: %s\n", filename);  in fsg_lun_open()
232 	if (curlun->cdrom) {  in fsg_lun_open()
245 	if (curlun->cdrom) {  in fsg_lun_open()
249 			LINFO(curlun, "file too big: %s\n", filename);  in fsg_lun_open()
250 			LINFO(curlun, "using only first %d blocks\n",  in fsg_lun_open()
255 		LINFO(curlun, "file too small: %s\n", filename);  in fsg_lun_open()
260 	if (fsg_lun_is_open(curlun))  in fsg_lun_open()
261 		fsg_lun_close(curlun);  in fsg_lun_open()
263 	curlun->blksize = blksize;  in fsg_lun_open()
264 	curlun->blkbits = blkbits;  in fsg_lun_open()
265 	curlun->ro = ro;  in fsg_lun_open()
266 	curlun->filp = filp;  in fsg_lun_open()
267 	curlun->file_length = size;  in fsg_lun_open()
268 	curlun->num_sectors = num_sectors;  in fsg_lun_open()
269 	LDBG(curlun, "open backing file: %s\n", filename);  in fsg_lun_open()
285 int fsg_lun_fsync_sub(struct fsg_lun *curlun)  in fsg_lun_fsync_sub()  argument
287 	struct file	*filp = curlun->filp;  in fsg_lun_fsync_sub()
289 	if (curlun->ro || !filp)  in fsg_lun_fsync_sub()
319 ssize_t fsg_show_ro(struct fsg_lun *curlun, char *buf)  in fsg_show_ro()  argument
321 	return sprintf(buf, "%d\n", fsg_lun_is_open(curlun)  in fsg_show_ro()
322 				  ? curlun->ro  in fsg_show_ro()
323 				  : curlun->initially_ro);  in fsg_show_ro()
327 ssize_t fsg_show_nofua(struct fsg_lun *curlun, char *buf)  in fsg_show_nofua()  argument
329 	return sprintf(buf, "%u\n", curlun->nofua);  in fsg_show_nofua()
333 ssize_t fsg_show_file(struct fsg_lun *curlun, struct rw_semaphore *filesem,  in fsg_show_file()  argument
340 	if (fsg_lun_is_open(curlun)) {	/* Get the complete pathname */  in fsg_show_file()
341 		p = file_path(curlun->filp, buf, PAGE_SIZE - 1);  in fsg_show_file()
359 ssize_t fsg_show_cdrom(struct fsg_lun *curlun, char *buf)  in fsg_show_cdrom()  argument
361 	return sprintf(buf, "%u\n", curlun->cdrom);  in fsg_show_cdrom()
365 ssize_t fsg_show_removable(struct fsg_lun *curlun, char *buf)  in fsg_show_removable()  argument
367 	return sprintf(buf, "%u\n", curlun->removable);  in fsg_show_removable()
371 ssize_t fsg_show_inquiry_string(struct fsg_lun *curlun, char *buf)  in fsg_show_inquiry_string()  argument
373 	return sprintf(buf, "%s\n", curlun->inquiry_string);  in fsg_show_inquiry_string()
380 static ssize_t _fsg_store_ro(struct fsg_lun *curlun, bool ro)  in _fsg_store_ro()  argument
382 	if (fsg_lun_is_open(curlun)) {  in _fsg_store_ro()
383 		LDBG(curlun, "read-only status change prevented\n");  in _fsg_store_ro()
387 	curlun->ro = ro;  in _fsg_store_ro()
388 	curlun->initially_ro = ro;  in _fsg_store_ro()
389 	LDBG(curlun, "read-only status set to %d\n", curlun->ro);  in _fsg_store_ro()
394 ssize_t fsg_store_ro(struct fsg_lun *curlun, struct rw_semaphore *filesem,  in fsg_store_ro()  argument
409 	rc = _fsg_store_ro(curlun, ro);  in fsg_store_ro()
418 ssize_t fsg_store_nofua(struct fsg_lun *curlun, const char *buf, size_t count)  in fsg_store_nofua()  argument
428 	if (!nofua && curlun->nofua)  in fsg_store_nofua()
429 		fsg_lun_fsync_sub(curlun);  in fsg_store_nofua()
431 	curlun->nofua = nofua;  in fsg_store_nofua()
437 ssize_t fsg_store_file(struct fsg_lun *curlun, struct rw_semaphore *filesem,  in fsg_store_file()  argument
442 	if (curlun->prevent_medium_removal && fsg_lun_is_open(curlun)) {  in fsg_store_file()
443 		LDBG(curlun, "eject attempt prevented\n");  in fsg_store_file()
455 		rc = fsg_lun_open(curlun, buf);  in fsg_store_file()
457 			curlun->unit_attention_data =  in fsg_store_file()
459 	} else if (fsg_lun_is_open(curlun)) {  in fsg_store_file()
460 		fsg_lun_close(curlun);  in fsg_store_file()
461 		curlun->unit_attention_data = SS_MEDIUM_NOT_PRESENT;  in fsg_store_file()
468 ssize_t fsg_store_cdrom(struct fsg_lun *curlun, struct rw_semaphore *filesem,  in fsg_store_cdrom()  argument
479 	ret = cdrom ? _fsg_store_ro(curlun, true) : 0;  in fsg_store_cdrom()
482 		curlun->cdrom = cdrom;  in fsg_store_cdrom()
491 ssize_t fsg_store_removable(struct fsg_lun *curlun, const char *buf,  in fsg_store_removable()  argument
501 	curlun->removable = removable;  in fsg_store_removable()
507 ssize_t fsg_store_inquiry_string(struct fsg_lun *curlun, const char *buf,  in fsg_store_inquiry_string()  argument
510 	const size_t len = min(count, sizeof(curlun->inquiry_string));  in fsg_store_inquiry_string()
513 		curlun->inquiry_string[0] = 0;  in fsg_store_inquiry_string()
515 		snprintf(curlun->inquiry_string,  in fsg_store_inquiry_string()
516 			 sizeof(curlun->inquiry_string), "%-28s", buf);  in fsg_store_inquiry_string()
517 		if (curlun->inquiry_string[len-1] == '\n')  in fsg_store_inquiry_string()
518 			curlun->inquiry_string[len-1] = ' ';  in fsg_store_inquiry_string()
525 ssize_t fsg_store_forced_eject(struct fsg_lun *curlun, struct rw_semaphore *filesem,  in fsg_store_forced_eject()  argument
534 	curlun->prevent_medium_removal = 0;  in fsg_store_forced_eject()
535 	ret = fsg_store_file(curlun, filesem, "", 0);  in fsg_store_forced_eject()