Current File : //proc/self/root/usr/include/mpath_persist.h
/* version - 1.0 */
#ifndef MPATH_PERSIST_LIB_H
#define MPATH_PERSIST_LIB_H
#ifdef __cplusplus
extern "C" {
#endif
#include <inttypes.h>
#define MPATH_MAX_PARAM_LEN 8192
#define MPATH_MX_TIDS 32 /* Max number of transport ids"*/
#define MPATH_MX_TID_LEN 256 /* Max length of transport id */
/* PRIN Service Actions */
#define MPATH_PRIN_RKEY_SA 0x00 /* READ KEYS SA*/
#define MPATH_PRIN_RRES_SA 0x01 /* READ RESERVATION SA*/
#define MPATH_PRIN_RCAP_SA 0x02 /* REPORT CAPABILITIES SA*/
#define MPATH_PRIN_RFSTAT_SA 0x03 /* READ FULL STATUS SA*/
/* PROUT Service Actions */
#define MPATH_PROUT_REG_SA 0x00 /* REGISTER SA */
#define MPATH_PROUT_RES_SA 0x01 /* RESERVE SA*/
#define MPATH_PROUT_REL_SA 0x02 /* RELEASE SA*/
#define MPATH_PROUT_CLEAR_SA 0x03 /* CLEAR SA*/
#define MPATH_PROUT_PREE_SA 0x04 /* PREEMPT SA*/
#define MPATH_PROUT_PREE_AB_SA 0x05 /* PREEMPT AND ABORT SA*/
#define MPATH_PROUT_REG_IGN_SA 0x06 /* REGISTER AND IGNORE EXISTING KEY SA*/
#define MPATH_PROUT_REG_MOV_SA 0x07 /* REGISTER AND MOVE SA*/
#define MPATH_LU_SCOPE 0x00 /* LU_SCOPE */
/* Persistent reservations type */
#define MPATH_PRTPE_WE 0x01 /* Write Exclusive */
#define MPATH_PRTPE_EA 0x03 /* Exclusive Access*/
#define MPATH_PRTPE_WE_RO 0x05 /* WriteExclusive Registrants Only */
#define MPATH_PRTPE_EA_RO 0x06 /* Exclusive Access. Registrants Only*/
#define MPATH_PRTPE_WE_AR 0x07 /* Write Exclusive. All Registrants*/
#define MPATH_PRTPE_EA_AR 0x08 /* Exclusive Access. All Registrants */
/* PR RETURN_STATUS */
#define MPATH_PR_SKIP -1 /* skipping this path */
#define MPATH_PR_SUCCESS 0
#define MPATH_PR_SYNTAX_ERROR 1 /* syntax error or invalid parameter */
/* status for check condition */
#define MPATH_PR_SENSE_NOT_READY 2 /* [sk,asc,ascq: 0x2,*,*] */
#define MPATH_PR_SENSE_MEDIUM_ERROR 3 /* [sk,asc,ascq: 0x3,*,*] */
#define MPATH_PR_SENSE_HARDWARE_ERROR 4 /* [sk,asc,ascq: 0x4,*,*] */
#define MPATH_PR_ILLEGAL_REQ 5 /* [sk,asc,ascq: 0x5,*,*]*/
#define MPATH_PR_SENSE_UNIT_ATTENTION 6 /* [sk,asc,ascq: 0x6,*,*] */
#define MPATH_PR_SENSE_INVALID_OP 7 /* [sk,asc,ascq: 0x5,0x20,0x0]*/
#define MPATH_PR_SENSE_ABORTED_COMMAND 8 /* [sk,asc,ascq: 0xb,*,*] */
#define MPATH_PR_NO_SENSE 9 /* [sk,asc,ascq: 0x0,*,*] */
#define MPATH_PR_SENSE_MALFORMED 10 /* Response to SCSI command malformed */
#define MPATH_PR_RESERV_CONFLICT 11 /* Reservation conflict on the device */
#define MPATH_PR_FILE_ERROR 12 /* file (device node) problems(e.g. not found)*/
#define MPATH_PR_DMMP_ERROR 13 /* DMMP related error.(e.g Error in getting dm info */
#define MPATH_PR_THREAD_ERROR 14 /* pthreads error (e.g. unable to create new thread) */
#define MPATH_PR_OTHER 15 /*other error/warning has occurred(transport
or driver error) */
/* PR MASK */
#define MPATH_F_APTPL_MASK 0x01 /* APTPL MASK*/
#define MPATH_F_ALL_TG_PT_MASK 0x04 /* ALL_TG_PT MASK*/
#define MPATH_F_SPEC_I_PT_MASK 0x08 /* SPEC_I_PT MASK*/
#define MPATH_PR_TYPE_MASK 0x0f /* TYPE MASK*/
#define MPATH_PR_SCOPE_MASK 0xf0 /* SCOPE MASK*/
/*Transport ID PROTOCOL IDENTIFIER values */
#define MPATH_PROTOCOL_ID_FC 0x00
#define MPATH_PROTOCOL_ID_ISCSI 0x05
#define MPATH_PROTOCOL_ID_SAS 0x06
/*Transport ID FORMATE CODE */
#define MPATH_WWUI_DEVICE_NAME 0x00 /* World wide unique initiator device name */
#define MPATH_WWUI_PORT_IDENTIFIER 0x40 /* World wide unique initiator port identifier */
extern unsigned int mpath_mx_alloc_len;
struct prin_readdescr
{
uint32_t prgeneration;
uint32_t additional_length; /* The value should be either 0 or divisible by 8.
0 indicates no registered reservation key. */
uint8_t key_list[MPATH_MAX_PARAM_LEN];
};
struct prin_resvdescr
{
uint32_t prgeneration;
uint32_t additional_length; /* The value should be either 0 or 10h. 0 indicates
there is no reservation held. 10h indicates the
key[8] and scope_type have valid values */
uint8_t key[8];
uint32_t _obsolete;
uint8_t _reserved;
uint8_t scope_type; /* Use PR SCOPE AND TYPE MASK specified above */
uint16_t _obsolete1;
};
struct prin_capdescr
{
uint16_t length;
uint8_t flags[2];
uint16_t pr_type_mask;
uint16_t _reserved;
};
struct transportid
{
uint8_t format_code;
uint8_t protocol_id;
union {
uint8_t n_port_name[8]; /* FC transport*/
uint8_t sas_address[8]; /* SAS transport */
uint8_t iscsi_name[256]; /* ISCSI transport */
};
};
struct prin_fulldescr
{
uint8_t key[8];
uint8_t flag; /* All_tg_pt and reservation holder */
uint8_t scope_type; /* Use PR SCOPE AND TYPE MASK specified above.
Meaningful only for reservation holder */
uint16_t rtpi;
struct transportid trnptid;
};
struct print_fulldescr_list
{
uint32_t prgeneration;
uint32_t number_of_descriptor;
uint8_t private_buffer[MPATH_MAX_PARAM_LEN]; /*Private buffer for list storage*/
struct prin_fulldescr *descriptors[];
};
struct prin_resp
{
union
{
struct prin_readdescr prin_readkeys; /* for PRIN read keys SA*/
struct prin_resvdescr prin_readresv; /* for PRIN read reservation SA*/
struct prin_capdescr prin_readcap; /* for PRIN Report Capabilities SA*/
struct print_fulldescr_list prin_readfd; /* for PRIN read full status SA*/
}prin_descriptor;
};
struct prout_param_descriptor { /* PROUT parameter descriptor */
uint8_t key[8];
uint8_t sa_key[8];
uint32_t _obsolete;
uint8_t sa_flags;
uint8_t _reserved;
uint16_t _obsolete1;
uint8_t private_buffer[MPATH_MAX_PARAM_LEN]; /*private buffer for list storage*/
uint32_t num_transportid; /* Number of Transport ID listed in trnptid_list[]*/
struct transportid *trnptid_list[];
};
/* Function declarations */
/*
* DESCRIPTION :
* Initialize device mapper multipath configuration. This function must be invoked first
* before performing reservation management functions.
* Either this function or mpath_lib_init() may be used.
* Use this function to work with libmultipath's internal "struct config"
* and "struct udev". The latter will be initialized automatically.
* Call libmpathpersist_exit() for cleanup.
* RESTRICTIONS:
*
* RETURNS: 0->Success, 1->Failed.
*/
extern int libmpathpersist_init (void);
/*
* DESCRIPTION :
* Initialize device mapper multipath configuration. This function must be invoked first
* before performing reservation management functions.
* Either this function or libmpathpersist_init() may be used.
* Use this function to work with an application-specific "struct config"
* and "struct udev". The latter must be initialized by the application.
* Call mpath_lib_exit() for cleanup.
* RESTRICTIONS:
*
* RETURNS: struct config ->Success, NULL->Failed.
*/
extern struct config * mpath_lib_init (void);
/*
* DESCRIPTION :
* Release device mapper multipath configuration. This function must be invoked after
* performing reservation management functions.
* Use this after initialization with mpath_lib_init().
* RESTRICTIONS:
*
* RETURNS: 0->Success, 1->Failed.
*/
extern int mpath_lib_exit (struct config *conf);
/*
* DESCRIPTION :
* Release device mapper multipath configuration a. This function must be invoked after
* performing reservation management functions.
* Use this after initialization with libmpathpersist_init().
* Calling libmpathpersist_init() after libmpathpersist_exit() will fail.
* RESTRICTIONS:
*
* RETURNS: 0->Success, 1->Failed.
*/
extern int libmpathpersist_exit (void);
/*
* DESCRIPTION :
* This function sends PRIN command to the DM device and get the response.
*
* @fd: The file descriptor of a multipath device. Input argument.
* @rq_servact: PRIN command service action. Input argument
* @resp: The response from PRIN service action. The resp is a struct specified above. The caller should
* manage the memory allocation of this struct
* @noisy: Turn on debugging trace: Input argument. 0->Disable, 1->Enable
* @verbose: Set verbosity level. Input argument. value:[0-3]. 0->disabled, 3->Max verbose
*
* RESTRICTIONS:
*
* RETURNS: MPATH_PR_SUCCESS if PR command successful else returns any of the status specified
* above in RETURN_STATUS.
*
*/
extern int mpath_persistent_reserve_in (int fd, int rq_servact, struct prin_resp *resp,
int noisy, int verbose);
/*
* DESCRIPTION :
* This function is like mpath_persistent_reserve_in(), except that it
* requires mpath_persistent_reserve_init_vecs() to be called before the
* PR call to set up internal variables. These must later be cleanup up
* by calling mpath_persistent_reserve_free_vecs().
*
* RESTRICTIONS:
* This function uses static internal variables, and is not thread-safe.
*/
extern int __mpath_persistent_reserve_in(int fd, int rq_servact,
struct prin_resp *resp, int noisy);
/*
* DESCRIPTION :
* This function sends PROUT command to the DM device and get the response.
*
* @fd: The file descriptor of a multipath device. Input argument.
* @rq_servact: PROUT command service action. Input argument
* @rq_scope: Persistent reservation scope. The value should be always LU_SCOPE (0h).
* @rq_type: Persistent reservation type. The valid values of persistent reservation types are
* 5h (Write exclusive - registrants only)
* 6h (Exclusive access - registrants only)
* 7h (Write exclusive - All registrants)
* 8h (Exclusive access - All registrants).
* @paramp: PROUT command parameter data. The paramp is a struct which describes PROUT
* parameter list. The caller should manage the memory allocation of this struct.
* @noisy: Turn on debugging trace: Input argument.0->Disable, 1->Enable.
* @verbose: Set verbosity level. Input argument. value:0 to 3. 0->disabled, 3->Max verbose
*
* RESTRICTIONS:
*
* RETURNS: MPATH_PR_SUCCESS if PR command successful else returns any of the status specified
* above in RETURN_STATUS.
*/
extern int mpath_persistent_reserve_out ( int fd, int rq_servact, int rq_scope,
unsigned int rq_type, struct prout_param_descriptor *paramp, int noisy,
int verbose);
/*
* DESCRIPTION :
* This function is like mpath_persistent_reserve_out(), except that it
* requires mpath_persistent_reserve_init_vecs() to be called before the
* PR call to set up internal variables. These must later be cleanup up
* by calling mpath_persistent_reserve_free_vecs().
*
* RESTRICTIONS:
* This function uses static internal variables, and is not thread-safe.
*/
extern int __mpath_persistent_reserve_out( int fd, int rq_servact, int rq_scope,
unsigned int rq_type, struct prout_param_descriptor *paramp,
int noisy);
/*
* DESCRIPTION :
* This function allocates data structures and performs basic initialization and
* device discovery for later calls of __mpath_persistent_reserve_in() or
* __mpath_persistent_reserve_out().
* @verbose: Set verbosity level. Input argument. value:0 to 3. 0->disabled, 3->Max verbose
*
* RESTRICTIONS:
* This function uses static internal variables, and is not thread-safe.
*
* RETURNS: MPATH_PR_SUCCESS if successful else returns any of the status specified
* above in RETURN_STATUS.
*/
int mpath_persistent_reserve_init_vecs(int verbose);
/*
* DESCRIPTION :
* This function frees data structures allocated by
* mpath_persistent_reserve_init_vecs().
*
* RESTRICTIONS:
* This function uses static internal variables, and is not thread-safe.
*/
void mpath_persistent_reserve_free_vecs(void);
#ifdef __cplusplus
}
#endif
#endif /*MPATH_PERSIST_LIB_H*/
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