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sg_cmds_basic.h

#ifndef SG_CMDS_BASIC_H
#define SG_CMDS_BASIC_H

/*
 * Copyright (c) 2004-2010 Douglas Gilbert.
 * All rights reserved.
 * Use of this source code is governed by a BSD-style
 * license that can be found in the BSD_LICENSE file.
 */

#ifdef __cplusplus
extern "C" {
#endif


/* Invokes a SCSI INQUIRY command and yields the response
 * Returns 0 when successful, SG_LIB_CAT_INVALID_OP -> not supported,
 * SG_LIB_CAT_ILLEGAL_REQ -> bad field in cdb,
 * SG_LIB_CAT_ABORTED_COMMAND, -1 -> other errors */
extern int sg_ll_inquiry(int sg_fd, int cmddt, int evpd, int pg_op,
                         void * resp, int mx_resp_len, int noisy,
                         int verbose);

/* Invokes a SCSI LOG SELECT command. Return of 0 -> success,
 * SG_LIB_CAT_INVALID_OP -> Log Select not supported,
 * SG_LIB_CAT_ILLEGAL_REQ -> bad field in cdb, SG_LIB_CAT_UNIT_ATTENTION,
 * SG_LIB_CAT_ABORTED_COMMAND, * SG_LIB_CAT_NOT_READY -> device not ready,
 * -1 -> other failure */
extern int sg_ll_log_select(int sg_fd, int pcr, int sp, int pc,
                            int pg_code, int subpg_code,
                            unsigned char * paramp, int param_len,
                            int noisy, int verbose);

/* Invokes a SCSI LOG SENSE command. Return of 0 -> success,
 * SG_LIB_CAT_INVALID_OP -> Log Sense not supported,
 * SG_LIB_CAT_ILLEGAL_REQ -> bad field in cdb, SG_LIB_CAT_UNIT_ATTENTION,
 * SG_LIB_CAT_NOT_READY -> device not ready, SG_LIB_CAT_ABORTED_COMMAND,
 * -1 -> other failure */
extern int sg_ll_log_sense(int sg_fd, int ppc, int sp, int pc, int pg_code,
                           int subpg_code, int paramp, unsigned char * resp,
                           int mx_resp_len, int noisy, int verbose);

/* Invokes a SCSI MODE SELECT (6) command.  Return of 0 -> success,
 * SG_LIB_CAT_INVALID_OP -> invalid opcode, SG_LIB_CAT_ILLEGAL_REQ ->
 * bad field in cdb, * SG_LIB_CAT_NOT_READY -> device not ready,
 * SG_LIB_CAT_UNIT_ATTENTION, SG_LIB_CAT_ABORTED_COMMAND,
 * -1 -> other failure */
extern int sg_ll_mode_select6(int sg_fd, int pf, int sp, void * paramp,
                              int param_len, int noisy, int verbose);

/* Invokes a SCSI MODE SELECT (10) command.  Return of 0 -> success,
 * SG_LIB_CAT_INVALID_OP -> invalid opcode, SG_LIB_CAT_ILLEGAL_REQ ->
 * bad field in cdb, * SG_LIB_CAT_NOT_READY -> device not ready,
 * SG_LIB_CAT_UNIT_ATTENTION, SG_LIB_CAT_ABORTED_COMMAND,
 * -1 -> other failure */
extern int sg_ll_mode_select10(int sg_fd, int pf, int sp, void * paramp,
                               int param_len, int noisy, int verbose);

/* Invokes a SCSI MODE SENSE (6) command. Return of 0 -> success,
 * SG_LIB_CAT_INVALID_OP -> invalid opcode, SG_LIB_CAT_ILLEGAL_REQ ->
 * bad field in cdb, * SG_LIB_CAT_NOT_READY -> device not ready,
 * SG_LIB_CAT_UNIT_ATTENTION, SG_LIB_CAT_ABORTED_COMMAND,
 * -1 -> other failure */
extern int sg_ll_mode_sense6(int sg_fd, int dbd, int pc, int pg_code,
                             int sub_pg_code, void * resp, int mx_resp_len,
                             int noisy, int verbose);

/* Invokes a SCSI MODE SENSE (10) command. Return of 0 -> success,
 * SG_LIB_CAT_INVALID_OP -> invalid opcode, SG_LIB_CAT_ILLEGAL_REQ ->
 * bad field in cdb, * SG_LIB_CAT_NOT_READY -> device not ready,
 * SG_LIB_CAT_UNIT_ATTENTION, SG_LIB_CAT_ABORTED_COMMAND,
 * -1 -> other failure */
extern int sg_ll_mode_sense10(int sg_fd, int llbaa, int dbd, int pc,
                              int pg_code, int sub_pg_code, void * resp,
                              int mx_resp_len, int noisy, int verbose);

/* Invokes a SCSI PREVENT ALLOW MEDIUM REMOVAL command (SPC-3)
 * prevent==0 allows removal, prevent==1 prevents removal ...
 * Return of 0 -> success,
 * SG_LIB_CAT_INVALID_OP -> command not supported
 * SG_LIB_CAT_ILLEGAL_REQ -> bad field in cdb, SG_LIB_CAT_UNIT_ATTENTION,
 * SG_LIB_CAT_NOT_READY -> device not ready, SG_LIB_CAT_ABORTED_COMMAND,
 * -1 -> other failure */
extern int sg_ll_prevent_allow(int sg_fd, int prevent, int noisy,
                               int verbose);

/* Invokes a SCSI READ CAPACITY (10) command. Return of 0 -> success,
 * SG_LIB_CAT_INVALID_OP -> invalid opcode, SG_LIB_CAT_UNIT_ATTENTION
 * -> perhaps media changed, SG_LIB_CAT_ILLEGAL_REQ -> bad field in cdb,
 * SG_LIB_CAT_NOT_READY -> device not ready, SG_LIB_CAT_ABORTED_COMMAND,
 * -1 -> other failure */
extern int sg_ll_readcap_10(int sg_fd, int pmi, unsigned int lba,
                            void * resp, int mx_resp_len, int noisy,
                            int verbose);

/* Invokes a SCSI READ CAPACITY (16) command. Returns 0 -> success,
 * SG_LIB_CAT_UNIT_ATTENTION -> media changed??, SG_LIB_CAT_INVALID_OP
 *  -> cdb not supported, SG_LIB_CAT_IlLEGAL_REQ -> bad field in cdb
 * SG_LIB_CAT_NOT_READY -> device not ready, SG_LIB_CAT_ABORTED_COMMAND,
 * -1 -> other failure */
extern int sg_ll_readcap_16(int sg_fd, int pmi, uint64_t llba, void * resp,
                            int mx_resp_len, int noisy, int verbose);

/* Invokes a SCSI REPORT LUNS command. Return of 0 -> success,
 * SG_LIB_CAT_INVALID_OP -> Report Luns not supported,
 * SG_LIB_CAT_ILLEGAL_REQ -> bad field in cdb, SG_LIB_CAT_ABORTED_COMMAND,
 * SG_LIB_NOT_READY (shouldn't happen), -1 -> other failure */
extern int sg_ll_report_luns(int sg_fd, int select_report, void * resp,
                             int mx_resp_len, int noisy, int verbose);

/* Invokes a SCSI REQUEST SENSE command. Return of 0 -> success,
 * SG_LIB_CAT_INVALID_OP -> Request Sense not supported??,
 * SG_LIB_CAT_ILLEGAL_REQ -> bad field in cdb, SG_LIB_CAT_ABORTED_COMMAND,
 * -1 -> other failure */
extern int sg_ll_request_sense(int sg_fd, int desc, void * resp,
                               int mx_resp_len, int noisy, int verbose);

/* Invokes a SCSI START STOP UNIT command (SBC + MMC).
 * Return of 0 -> success,
 * SG_LIB_CAT_INVALID_OP -> Start stop unit not supported,
 * SG_LIB_CAT_ILLEGAL_REQ -> bad field in cdb, SG_LIB_CAT_UNIT_ATTENTION,
 * SG_LIB_CAT_NOT_READY -> device not ready, SG_LIB_CAT_ABORTED_COMMAND,
 * -1 -> other failure
 * SBC-3 and MMC partially overlap on the power_condition_modifier(sbc) and
 * format_layer_number(mmc) fields. They also overlap on the noflush(sbc)
 * and fl(mmc) one bit field. This is the cause of the awkardly named
 * pc_mod__fl_num and noflush__fl arguments to this function.  */
extern int sg_ll_start_stop_unit(int sg_fd, int immed, int pc_mod__fl_num,
                                 int power_cond, int noflush__fl, int loej,
                                 int start, int noisy, int verbose);

/* Invokes a SCSI SYNCHRONIZE CACHE (10) command. Return of 0 -> success,
 * SG_LIB_CAT_UNIT_ATTENTION, SG_LIB_CAT_ABORTED_COMMAND,
 * SG_LIB_CAT_INVALID_OP -> cdb not supported,
 * SG_LIB_CAT_IlLEGAL_REQ -> bad field in cdb
 * SG_LIB_CAT_NOT_READY -> device not ready, -1 -> other failure */
extern int sg_ll_sync_cache_10(int sg_fd, int sync_nv, int immed, int group,
                               unsigned int lba, unsigned int count,
                               int noisy, int verbose);

/* Invokes a SCSI TEST UNIT READY command.
 * 'pack_id' is just for diagnostics, safe to set to 0.
 * Return of 0 -> success, SG_LIB_CAT_UNIT_ATTENTION,
 * SG_LIB_CAT_NOT_READY -> device not ready,
 * SG_LIB_CAT_ABORTED_COMMAND, -1 -> other failure */
extern int sg_ll_test_unit_ready(int sg_fd, int pack_id, int noisy,
                                 int verbose);

/* Invokes a SCSI TEST UNIT READY command.
 * 'pack_id' is just for diagnostics, safe to set to 0.
 * Looks for progress indicator if 'progress' non-NULL;
 * if found writes value [0..65535] else write -1.
 * Return of 0 -> success, SG_LIB_CAT_UNIT_ATTENTION,
 * SG_LIB_CAT_ABORTED_COMMAND, SG_LIB_CAT_NOT_READY ->
 * device not ready, -1 -> other failure */
extern int sg_ll_test_unit_ready_progress(int sg_fd, int pack_id,
                                          int * progress, int noisy,
                                          int verbose);


00161 struct sg_simple_inquiry_resp {
    unsigned char peripheral_qualifier;
    unsigned char peripheral_type;
    unsigned char rmb;
    unsigned char version;      /* as per recent drafts: whole of byte 2 */
    unsigned char byte_3;
    unsigned char byte_5;
    unsigned char byte_6;
    unsigned char byte_7;
    char vendor[9];
    char product[17];
    char revision[5];
};

/* Yields most of first 36 bytes of a standard INQUIRY (evpd==0) response.
 * Returns 0 when successful, SG_LIB_CAT_INVALID_OP -> not supported,
 * SG_LIB_CAT_ILLEGAL_REQ -> bad field in cdb, SG_LIB_CAT_ABORTED_COMMAND,
 * -1 -> other errors */
extern int sg_simple_inquiry(int sg_fd,
                             struct sg_simple_inquiry_resp * inq_data,
                             int noisy, int verbose);

/* MODE SENSE commands yield a response that has block descriptors followed
 * by mode pages. In most cases users are interested in the first mode page.
 * This function returns the (byte) offset of the start of the first mode
 * page. Set mode_sense_6 to 1 for MODE SENSE (6) and 0 for MODE SENSE (10).
 * Returns >= 0 is successful or -1 if failure. If there is a failure
 * a message is written to err_buff. */
extern int sg_mode_page_offset(const unsigned char * resp, int resp_len,
                               int mode_sense_6, char * err_buff,
                               int err_buff_len);

/* Fetches current, changeable, default and/or saveable modes pages as
 * indicated by pcontrol_arr for given pg_code and sub_pg_code. If
 * mode6==0 then use MODE SENSE (10) else use MODE SENSE (6). If
 * flexible set and mode data length seems wrong then try and
 * fix (compensating hack for bad device or driver). pcontrol_arr
 * should have 4 elements for output of current, changeable, default
 * and saved values respectively. Each element should be NULL or
 * at least mx_mpage_len bytes long.
 * Return of 0 -> overall success, SG_LIB_CAT_INVALID_OP -> invalid opcode,
 * SG_LIB_CAT_ILLEGAL_REQ -> bad field in cdb, SG_LIB_CAT_UNIT_ATTENTION,
 * SG_LIB_CAT_NOT_READY -> device not ready,
 * SG_LIB_CAT_MALFORMED -> bad response, -1 -> other failure.
 * If success_mask pointer is not NULL then first zeros it. Then set bits
 * 0, 1, 2 and/or 3 if the current, changeable, default and saved values
 * respectively have been fetched. If error on current page
 * then stops and returns that error; otherwise continues if an error is
 * detected but returns the first error encountered.  */
extern int sg_get_mode_page_controls(int sg_fd, int mode6, int pg_code,
                              int sub_pg_code, int dbd, int flexible,
                              int mx_mpage_len, int * success_mask,
                              void * pcontrol_arr[], int * reported_len,
                              int verbose);

/* Returns file descriptor >= 0 if successful. If error in Unix returns
   negated errno. Implementation calls scsi_pt_open_device(). */
extern int sg_cmds_open_device(const char * device_name, int read_only,
                               int verbose);

/* Returns file descriptor >= 0 if successful. If error in Unix returns
   negated errno. Implementation calls scsi_pt_open_flags(). */
extern int sg_cmds_open_flags(const char * device_name, int flags,
                              int verbose);

/* Returns 0 if successful. If error in Unix returns negated errno.
   Implementation calls scsi_pt_close_device(). */
extern int sg_cmds_close_device(int device_fd);

extern const char * sg_cmds_version();


struct sg_pt_base;

/* This is a helper function used by all sg_cmds_* implementations.
 * If valid sense data is found it is decoded and output to sg_warnings_strm
 * (def: stderr); depending on the 'noisy' and 'verbose' settings.
 * Returns -2 for sense data (may not be fatal), -1 for failed or the
 * number of data in bytes received. For data out (to device) or no data,
 * set 'mx_di_len' to 0 or less. If -2 returned then sense category
 * output via 'o_sense_cat' pointer (if not NULL). Note that several sense
 * categories also have data in bytes received; -2 is still returned. */
extern int sg_cmds_process_resp(struct sg_pt_base * ptvp, const char * leadin,
                                int res, int mx_di_len,
                                const unsigned char * sense_b, int noisy,
                                int verbose, int * o_sense_cat);

#ifdef __cplusplus
}
#endif

#endif

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