cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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f_mass_storage.h (4168B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef USB_F_MASS_STORAGE_H
      3#define USB_F_MASS_STORAGE_H
      4
      5#include <linux/usb/composite.h>
      6#include "storage_common.h"
      7
      8struct fsg_module_parameters {
      9	char		*file[FSG_MAX_LUNS];
     10	bool		ro[FSG_MAX_LUNS];
     11	bool		removable[FSG_MAX_LUNS];
     12	bool		cdrom[FSG_MAX_LUNS];
     13	bool		nofua[FSG_MAX_LUNS];
     14
     15	unsigned int	file_count, ro_count, removable_count, cdrom_count;
     16	unsigned int	nofua_count;
     17	unsigned int	luns;	/* nluns */
     18	bool		stall;	/* can_stall */
     19};
     20
     21#define _FSG_MODULE_PARAM_ARRAY(prefix, params, name, type, desc)	\
     22	module_param_array_named(prefix ## name, params.name, type,	\
     23				 &prefix ## params.name ## _count,	\
     24				 S_IRUGO);				\
     25	MODULE_PARM_DESC(prefix ## name, desc)
     26
     27#define _FSG_MODULE_PARAM(prefix, params, name, type, desc)		\
     28	module_param_named(prefix ## name, params.name, type,		\
     29			   S_IRUGO);					\
     30	MODULE_PARM_DESC(prefix ## name, desc)
     31
     32#define __FSG_MODULE_PARAMETERS(prefix, params)				\
     33	_FSG_MODULE_PARAM_ARRAY(prefix, params, file, charp,		\
     34				"names of backing files or devices");	\
     35	_FSG_MODULE_PARAM_ARRAY(prefix, params, ro, bool,		\
     36				"true to force read-only");		\
     37	_FSG_MODULE_PARAM_ARRAY(prefix, params, removable, bool,	\
     38				"true to simulate removable media");	\
     39	_FSG_MODULE_PARAM_ARRAY(prefix, params, cdrom, bool,		\
     40				"true to simulate CD-ROM instead of disk"); \
     41	_FSG_MODULE_PARAM_ARRAY(prefix, params, nofua, bool,		\
     42				"true to ignore SCSI WRITE(10,12) FUA bit"); \
     43	_FSG_MODULE_PARAM(prefix, params, luns, uint,			\
     44			  "number of LUNs");				\
     45	_FSG_MODULE_PARAM(prefix, params, stall, bool,			\
     46			  "false to prevent bulk stalls")
     47
     48#ifdef CONFIG_USB_GADGET_DEBUG_FILES
     49
     50#define FSG_MODULE_PARAMETERS(prefix, params)				\
     51	__FSG_MODULE_PARAMETERS(prefix, params);			\
     52	module_param_named(num_buffers, fsg_num_buffers, uint, S_IRUGO);\
     53	MODULE_PARM_DESC(num_buffers, "Number of pipeline buffers")
     54#else
     55
     56#define FSG_MODULE_PARAMETERS(prefix, params)				\
     57	__FSG_MODULE_PARAMETERS(prefix, params)
     58
     59#endif
     60
     61struct fsg_common;
     62
     63/* FSF callback functions */
     64struct fsg_lun_opts {
     65	struct config_group group;
     66	struct fsg_lun *lun;
     67	int lun_id;
     68};
     69
     70struct fsg_opts {
     71	struct fsg_common *common;
     72	struct usb_function_instance func_inst;
     73	struct fsg_lun_opts lun0;
     74	struct config_group *default_groups[2];
     75	bool no_configfs; /* for legacy gadgets */
     76
     77	/*
     78	 * Read/write access to configfs attributes is handled by configfs.
     79	 *
     80	 * This is to protect the data from concurrent access by read/write
     81	 * and create symlink/remove symlink.
     82	 */
     83	struct mutex			lock;
     84	int				refcnt;
     85};
     86
     87struct fsg_lun_config {
     88	const char *filename;
     89	char ro;
     90	char removable;
     91	char cdrom;
     92	char nofua;
     93	char inquiry_string[INQUIRY_STRING_LEN];
     94};
     95
     96struct fsg_config {
     97	unsigned nluns;
     98	struct fsg_lun_config luns[FSG_MAX_LUNS];
     99
    100	/* Callback functions. */
    101	const struct fsg_operations	*ops;
    102	/* Gadget's private data. */
    103	void			*private_data;
    104
    105	const char *vendor_name;		/*  8 characters or less */
    106	const char *product_name;		/* 16 characters or less */
    107
    108	char			can_stall;
    109	unsigned int		fsg_num_buffers;
    110};
    111
    112static inline struct fsg_opts *
    113fsg_opts_from_func_inst(const struct usb_function_instance *fi)
    114{
    115	return container_of(fi, struct fsg_opts, func_inst);
    116}
    117
    118void fsg_common_set_sysfs(struct fsg_common *common, bool sysfs);
    119
    120int fsg_common_set_num_buffers(struct fsg_common *common, unsigned int n);
    121
    122void fsg_common_free_buffers(struct fsg_common *common);
    123
    124int fsg_common_set_cdev(struct fsg_common *common,
    125			struct usb_composite_dev *cdev, bool can_stall);
    126
    127void fsg_common_remove_lun(struct fsg_lun *lun);
    128
    129void fsg_common_remove_luns(struct fsg_common *common);
    130
    131int fsg_common_create_lun(struct fsg_common *common, struct fsg_lun_config *cfg,
    132			  unsigned int id, const char *name,
    133			  const char **name_pfx);
    134
    135int fsg_common_create_luns(struct fsg_common *common, struct fsg_config *cfg);
    136
    137void fsg_common_set_inquiry_string(struct fsg_common *common, const char *vn,
    138				   const char *pn);
    139
    140void fsg_config_from_params(struct fsg_config *cfg,
    141			    const struct fsg_module_parameters *params,
    142			    unsigned int fsg_num_buffers);
    143
    144#endif /* USB_F_MASS_STORAGE_H */