Provide a UAPI version of the header in the kernel, making it easier for interested projects to use an up-to-date version of the header. The new headers are placed under uapi/linux/ so as not to conflict with the glibc-provided headers in /usr/include/scsi. /dev/sgN default values are implementation aspects, and are moved to drivers/scsi/sg.c instead (together with e.g. SG_ALLOW_DIO_DEF). However, SG_SCATTER_SZ is used by Wine so it is kept in linux/sg.h SG_MAX_QUEUE could also be useful. struct scsi_ioctl_command and struct scsi_idlun used to be under "#ifdef __KERNEL__", but they are actually useful for userspace as well. Add them to the new header. Cc: James Bottomley <jbottomley@xxxxxxxxxxxxx> Cc: Christoph Hellwig <hch@xxxxxx> Cc: linux-scsi@xxxxxxxxxxxxxxx Cc: Bart Van Assche <bart.vanassche@xxxxxxxxxxx> Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> --- drivers/scsi/sg.c | 8 +- include/scsi/scsi_ioctl.h | 50 +----- include/scsi/sg.h | 261 +----------------------------- include/uapi/linux/Kbuild | 2 + include/{scsi => uapi/linux}/scsi_ioctl.h | 23 +-- include/{scsi => uapi/linux}/sg.h | 40 +---- 6 files changed, 25 insertions(+), 359 deletions(-) copy include/{scsi => uapi/linux}/scsi_ioctl.h (77%) copy include/{scsi => uapi/linux}/sg.h (91%) diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index 9d7b7db75e4b..3410e50a37d0 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -90,7 +90,14 @@ static void sg_proc_cleanup(void); */ #define MULDIV(X,MUL,DIV) ((((X % DIV) * MUL) / DIV) + ((X / DIV) * MUL)) +#define SG_DEFAULT_TIMEOUT_USER (60*USER_HZ) /* HZ == 'jiffies in 1 second' */ #define SG_DEFAULT_TIMEOUT MULDIV(SG_DEFAULT_TIMEOUT_USER, HZ, USER_HZ) +#define SG_DEFAULT_RETRIES 0 +#define SG_DEF_FORCE_LOW_DMA 0 +#define SG_DEF_FORCE_PACK_ID 0 +#define SG_DEF_KEEP_ORPHAN 0 +#define SG_DEF_COMMAND_Q 0 +#define SG_DEF_RESERVED_SIZE SG_SCATTER_SZ int sg_big_buff = SG_DEF_RESERVED_SIZE; /* N.B. This variable is readable and writeable via diff --git a/include/scsi/scsi_ioctl.h b/include/scsi/scsi_ioctl.h index 2bd9d67c201a..d54f9db2e079 100644 --- a/include/scsi/scsi_ioctl.h +++ b/include/scsi/scsi_ioctl.h @@ -1,60 +1,12 @@ #ifndef _SCSI_IOCTL_H #define _SCSI_IOCTL_H -#define SCSI_IOCTL_SEND_COMMAND 1 -#define SCSI_IOCTL_TEST_UNIT_READY 2 -#define SCSI_IOCTL_BENCHMARK_COMMAND 3 -#define SCSI_IOCTL_SYNC 4 /* Request synchronous parameters */ -#define SCSI_IOCTL_START_UNIT 5 -#define SCSI_IOCTL_STOP_UNIT 6 -/* The door lock/unlock constants are compatible with Sun constants for - the cdrom */ -#define SCSI_IOCTL_DOORLOCK 0x5380 /* lock the eject mechanism */ -#define SCSI_IOCTL_DOORUNLOCK 0x5381 /* unlock the mechanism */ - -/* - * Here are some obsolete SCSI-specific ioctl commands. - * - * Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395 - */ - -/* Used to obtain PUN and LUN info. Conflicts with CDROMAUDIOBUFSIZ */ -#define SCSI_IOCTL_GET_IDLUN 0x5382 - -/* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */ - -/* Used to obtain the host number of a device. */ -#define SCSI_IOCTL_PROBE_HOST 0x5385 - -/* Used to obtain the bus number for a device */ -#define SCSI_IOCTL_GET_BUS_NUMBER 0x5386 - -/* Used to obtain the PCI location of a device */ -#define SCSI_IOCTL_GET_PCI 0x5387 - -#ifdef __KERNEL__ +#include <uapi/linux/scsi_ioctl.h> struct scsi_device; -/* - * Structures used for scsi_ioctl et al. - */ - -typedef struct scsi_ioctl_command { - unsigned int inlen; - unsigned int outlen; - unsigned char data[0]; -} Scsi_Ioctl_Command; - -typedef struct scsi_idlun { - __u32 dev_id; - __u32 host_unique_id; -} Scsi_Idlun; - - int scsi_ioctl_block_when_processing_errors(struct scsi_device *sdev, int cmd, bool ndelay); extern int scsi_ioctl(struct scsi_device *, int, void __user *); -#endif /* __KERNEL__ */ #endif /* _SCSI_IOCTL_H */ diff --git a/include/scsi/sg.h b/include/scsi/sg.h index 370c78c37926..f9d3d1dace41 100644 --- a/include/scsi/sg.h +++ b/include/scsi/sg.h @@ -2,267 +2,8 @@ #define _SCSI_GENERIC_H #include <linux/compiler.h> +#include <uapi/linux/sg.h> -/* - * History: - * Started: Aug 9 by Lawrence Foard (entropy@xxxxxxxxxxxxx), to allow user - * process control of SCSI devices. - * Development Sponsored by Killy Corp. NY NY - * - * Original driver (sg.h): - * Copyright (C) 1992 Lawrence Foard - * Version 2 and 3 extensions to driver: - * Copyright (C) 1998 - 2014 Douglas Gilbert - * - * Version: 3.5.36 (20140603) - * This version is for 2.6 and 3 series kernels. - * - * Documentation - * ============= - * A web site for the SG device driver can be found at: - * http://sg.danny.cz/sg [alternatively check the MAINTAINERS file] - * The documentation for the sg version 3 driver can be found at: - * http://sg.danny.cz/sg/p/sg_v3_ho.html - * Also see: <kernel_source>/Documentation/scsi/scsi-generic.txt - * - * For utility and test programs see: http://sg.danny.cz/sg/sg3_utils.html - */ - -#ifdef __KERNEL__ extern int sg_big_buff; /* for sysctl */ -#endif - - -typedef struct sg_iovec /* same structure as used by readv() Linux system */ -{ /* call. It defines one scatter-gather element. */ - void __user *iov_base; /* Starting address */ - size_t iov_len; /* Length in bytes */ -} sg_iovec_t; - - -typedef struct sg_io_hdr -{ - int interface_id; /* [i] 'S' for SCSI generic (required) */ - int dxfer_direction; /* [i] data transfer direction */ - unsigned char cmd_len; /* [i] SCSI command length */ - unsigned char mx_sb_len; /* [i] max length to write to sbp */ - unsigned short iovec_count; /* [i] 0 implies no scatter gather */ - unsigned int dxfer_len; /* [i] byte count of data transfer */ - void __user *dxferp; /* [i], [*io] points to data transfer memory - or scatter gather list */ - unsigned char __user *cmdp; /* [i], [*i] points to command to perform */ - void __user *sbp; /* [i], [*o] points to sense_buffer memory */ - unsigned int timeout; /* [i] MAX_UINT->no timeout (unit: millisec) */ - unsigned int flags; /* [i] 0 -> default, see SG_FLAG... */ - int pack_id; /* [i->o] unused internally (normally) */ - void __user * usr_ptr; /* [i->o] unused internally */ - unsigned char status; /* [o] scsi status */ - unsigned char masked_status;/* [o] shifted, masked scsi status */ - unsigned char msg_status; /* [o] messaging level data (optional) */ - unsigned char sb_len_wr; /* [o] byte count actually written to sbp */ - unsigned short host_status; /* [o] errors from host adapter */ - unsigned short driver_status;/* [o] errors from software driver */ - int resid; /* [o] dxfer_len - actual_transferred */ - unsigned int duration; /* [o] time taken by cmd (unit: millisec) */ - unsigned int info; /* [o] auxiliary information */ -} sg_io_hdr_t; /* 64 bytes long (on i386) */ - -#define SG_INTERFACE_ID_ORIG 'S' - -/* Use negative values to flag difference from original sg_header structure */ -#define SG_DXFER_NONE (-1) /* e.g. a SCSI Test Unit Ready command */ -#define SG_DXFER_TO_DEV (-2) /* e.g. a SCSI WRITE command */ -#define SG_DXFER_FROM_DEV (-3) /* e.g. a SCSI READ command */ -#define SG_DXFER_TO_FROM_DEV (-4) /* treated like SG_DXFER_FROM_DEV with the - additional property than during indirect - IO the user buffer is copied into the - kernel buffers before the transfer */ -#define SG_DXFER_UNKNOWN (-5) /* Unknown data direction */ - -/* following flag values can be "or"-ed together */ -#define SG_FLAG_DIRECT_IO 1 /* default is indirect IO */ -#define SG_FLAG_UNUSED_LUN_INHIBIT 2 /* default is overwrite lun in SCSI */ - /* command block (when <= SCSI_2) */ -#define SG_FLAG_MMAP_IO 4 /* request memory mapped IO */ -#define SG_FLAG_NO_DXFER 0x10000 /* no transfer of kernel buffers to/from */ - /* user space (debug indirect IO) */ -/* defaults:: for sg driver: Q_AT_HEAD; for block layer: Q_AT_TAIL */ -#define SG_FLAG_Q_AT_TAIL 0x10 -#define SG_FLAG_Q_AT_HEAD 0x20 - -/* following 'info' values are "or"-ed together */ -#define SG_INFO_OK_MASK 0x1 -#define SG_INFO_OK 0x0 /* no sense, host nor driver "noise" */ -#define SG_INFO_CHECK 0x1 /* something abnormal happened */ - -#define SG_INFO_DIRECT_IO_MASK 0x6 -#define SG_INFO_INDIRECT_IO 0x0 /* data xfer via kernel buffers (or no xfer) */ -#define SG_INFO_DIRECT_IO 0x2 /* direct IO requested and performed */ -#define SG_INFO_MIXED_IO 0x4 /* part direct, part indirect IO */ - - -typedef struct sg_scsi_id { /* used by SG_GET_SCSI_ID ioctl() */ - int host_no; /* as in "scsi<n>" where 'n' is one of 0, 1, 2 etc */ - int channel; - int scsi_id; /* scsi id of target device */ - int lun; - int scsi_type; /* TYPE_... defined in scsi/scsi.h */ - short h_cmd_per_lun;/* host (adapter) maximum commands per lun */ - short d_queue_depth;/* device (or adapter) maximum queue length */ - int unused[2]; /* probably find a good use, set 0 for now */ -} sg_scsi_id_t; /* 32 bytes long on i386 */ - -typedef struct sg_req_info { /* used by SG_GET_REQUEST_TABLE ioctl() */ - char req_state; /* 0 -> not used, 1 -> written, 2 -> ready to read */ - char orphan; /* 0 -> normal request, 1 -> from interruped SG_IO */ - char sg_io_owned; /* 0 -> complete with read(), 1 -> owned by SG_IO */ - char problem; /* 0 -> no problem detected, 1 -> error to report */ - int pack_id; /* pack_id associated with request */ - void __user *usr_ptr; /* user provided pointer (in new interface) */ - unsigned int duration; /* millisecs elapsed since written (req_state==1) - or request duration (req_state==2) */ - int unused; -} sg_req_info_t; /* 20 bytes long on i386 */ - - -/* IOCTLs: Those ioctls that are relevant to the SG 3.x drivers follow. - [Those that only apply to the SG 2.x drivers are at the end of the file.] - (_GET_s yield result via 'int *' 3rd argument unless otherwise indicated) */ - -#define SG_EMULATED_HOST 0x2203 /* true for emulated host adapter (ATAPI) */ - -/* Used to configure SCSI command transformation layer for ATAPI devices */ -/* Only supported by the ide-scsi driver */ -#define SG_SET_TRANSFORM 0x2204 /* N.B. 3rd arg is not pointer but value: */ - /* 3rd arg = 0 to disable transform, 1 to enable it */ -#define SG_GET_TRANSFORM 0x2205 - -#define SG_SET_RESERVED_SIZE 0x2275 /* request a new reserved buffer size */ -#define SG_GET_RESERVED_SIZE 0x2272 /* actual size of reserved buffer */ - -/* The following ioctl has a 'sg_scsi_id_t *' object as its 3rd argument. */ -#define SG_GET_SCSI_ID 0x2276 /* Yields fd's bus, chan, dev, lun + type */ -/* SCSI id information can also be obtained from SCSI_IOCTL_GET_IDLUN */ - -/* Override host setting and always DMA using low memory ( <16MB on i386) */ -#define SG_SET_FORCE_LOW_DMA 0x2279 /* 0-> use adapter setting, 1-> force */ -#define SG_GET_LOW_DMA 0x227a /* 0-> use all ram for dma; 1-> low dma ram */ - -/* When SG_SET_FORCE_PACK_ID set to 1, pack_id is input to read() which - tries to fetch a packet with a matching pack_id, waits, or returns EAGAIN. - If pack_id is -1 then read oldest waiting. When ...FORCE_PACK_ID set to 0 - then pack_id ignored by read() and oldest readable fetched. */ -#define SG_SET_FORCE_PACK_ID 0x227b -#define SG_GET_PACK_ID 0x227c /* Yields oldest readable pack_id (or -1) */ - -#define SG_GET_NUM_WAITING 0x227d /* Number of commands awaiting read() */ - -/* Yields max scatter gather tablesize allowed by current host adapter */ -#define SG_GET_SG_TABLESIZE 0x227F /* 0 implies can't do scatter gather */ - -#define SG_GET_VERSION_NUM 0x2282 /* Example: version 2.1.34 yields 20134 */ - -/* Returns -EBUSY if occupied. 3rd argument pointer to int (see next) */ -#define SG_SCSI_RESET 0x2284 -/* Associated values that can be given to SG_SCSI_RESET follow. - * SG_SCSI_RESET_NO_ESCALATE may be OR-ed to the _DEVICE, _TARGET, _BUS - * or _HOST reset value so only that action is attempted. */ -#define SG_SCSI_RESET_NOTHING 0 -#define SG_SCSI_RESET_DEVICE 1 -#define SG_SCSI_RESET_BUS 2 -#define SG_SCSI_RESET_HOST 3 -#define SG_SCSI_RESET_TARGET 4 -#define SG_SCSI_RESET_NO_ESCALATE 0x100 - -/* synchronous SCSI command ioctl, (only in version 3 interface) */ -#define SG_IO 0x2285 /* similar effect as write() followed by read() */ - -#define SG_GET_REQUEST_TABLE 0x2286 /* yields table of active requests */ - -/* How to treat EINTR during SG_IO ioctl(), only in SG 3.x series */ -#define SG_SET_KEEP_ORPHAN 0x2287 /* 1 -> hold for read(), 0 -> drop (def) */ -#define SG_GET_KEEP_ORPHAN 0x2288 - -/* yields scsi midlevel's access_count for this SCSI device */ -#define SG_GET_ACCESS_COUNT 0x2289 - - -#define SG_SCATTER_SZ (8 * 4096) -/* Largest size (in bytes) a single scatter-gather list element can have. - The value used by the driver is 'max(SG_SCATTER_SZ, PAGE_SIZE)'. - This value should be a power of 2 (and may be rounded up internally). - If scatter-gather is not supported by adapter then this value is the - largest data block that can be read/written by a single scsi command. */ - -#define SG_DEFAULT_RETRIES 0 - -/* Defaults, commented if they differ from original sg driver */ -#define SG_DEF_FORCE_LOW_DMA 0 /* was 1 -> memory below 16MB on i386 */ -#define SG_DEF_FORCE_PACK_ID 0 -#define SG_DEF_KEEP_ORPHAN 0 -#define SG_DEF_RESERVED_SIZE SG_SCATTER_SZ /* load time option */ - -/* maximum outstanding requests, write() yields EDOM if exceeded */ -#define SG_MAX_QUEUE 16 - -#define SG_BIG_BUFF SG_DEF_RESERVED_SIZE /* for backward compatibility */ - - -/* vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv */ -/* The older SG interface based on the 'sg_header' structure follows. */ -/* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ */ - -#define SG_MAX_SENSE 16 /* this only applies to the sg_header interface */ - -struct sg_header -{ - int pack_len; /* [o] reply_len (ie useless), ignored as input */ - int reply_len; /* [i] max length of expected reply (inc. sg_header) */ - int pack_id; /* [io] id number of packet (use ints >= 0) */ - int result; /* [o] 0==ok, else (+ve) Unix errno (best ignored) */ - unsigned int twelve_byte:1; - /* [i] Force 12 byte command length for group 6 & 7 commands */ - unsigned int target_status:5; /* [o] scsi status from target */ - unsigned int host_status:8; /* [o] host status (see "DID" codes) */ - unsigned int driver_status:8; /* [o] driver status+suggestion */ - unsigned int other_flags:10; /* unused */ - unsigned char sense_buffer[SG_MAX_SENSE]; /* [o] Output in 3 cases: - when target_status is CHECK_CONDITION or - when target_status is COMMAND_TERMINATED or - when (driver_status & DRIVER_SENSE) is true. */ -}; /* This structure is 36 bytes long on i386 */ - - -/* IOCTLs: The following are not required (or ignored) when the sg_io_hdr_t - interface is used. They are kept for backward compatibility with - the original and version 2 drivers. */ - -#define SG_SET_TIMEOUT 0x2201 /* unit: jiffies (10ms on i386) */ -#define SG_GET_TIMEOUT 0x2202 /* yield timeout as _return_ value */ - -/* Get/set command queuing state per fd (default is SG_DEF_COMMAND_Q. - Each time a sg_io_hdr_t object is seen on this file descriptor, this - command queuing flag is set on (overriding the previous setting). */ -#define SG_GET_COMMAND_Q 0x2270 /* Yields 0 (queuing off) or 1 (on) */ -#define SG_SET_COMMAND_Q 0x2271 /* Change queuing state with 0 or 1 */ - -/* Turn on/off error sense trace (1 and 0 respectively, default is off). - Try using: "# cat /proc/scsi/sg/debug" instead in the v3 driver */ -#define SG_SET_DEBUG 0x227e /* 0 -> turn off debug */ - -#define SG_NEXT_CMD_LEN 0x2283 /* override SCSI command length with given - number on the next write() on this file descriptor */ - - -/* Defaults, commented if they differ from original sg driver */ -#ifdef __KERNEL__ -#define SG_DEFAULT_TIMEOUT_USER (60*USER_HZ) /* HZ == 'jiffies in 1 second' */ -#else -#define SG_DEFAULT_TIMEOUT (60*HZ) /* HZ == 'jiffies in 1 second' */ -#endif - -#define SG_DEF_COMMAND_Q 0 /* command queuing is always on when - the new interface is used */ -#define SG_DEF_UNDERRUN_FLAG 0 #endif diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild index 70ff1d9abf0d..61ad1c5a4aae 100644 --- a/include/uapi/linux/Kbuild +++ b/include/uapi/linux/Kbuild @@ -357,6 +357,7 @@ header-y += scc.h header-y += sched.h header-y += scif_ioctl.h header-y += screen_info.h +header-y += scsi_ioctl.h header-y += sctp.h header-y += sdla.h header-y += seccomp.h @@ -367,6 +368,7 @@ header-y += serial_core.h header-y += serial.h header-y += serial_reg.h header-y += serio.h +header-y += sg.h header-y += shm.h header-y += signalfd.h header-y += signal.h diff --git a/include/scsi/scsi_ioctl.h b/include/uapi/linux/scsi_ioctl.h similarity index 77% copy from include/scsi/scsi_ioctl.h copy to include/uapi/linux/scsi_ioctl.h index 2bd9d67c201a..14a3c374d918 100644 --- a/include/scsi/scsi_ioctl.h +++ b/include/uapi/linux/scsi_ioctl.h @@ -1,5 +1,9 @@ -#ifndef _SCSI_IOCTL_H -#define _SCSI_IOCTL_H +#ifndef _UAPI_LINUX_SCSI_IOCTL_H +#define _UAPI_LINUX_SCSI_IOCTL_H + +/* + * These ioctls are obsolete. Use linux/sg.h instead. + */ #define SCSI_IOCTL_SEND_COMMAND 1 #define SCSI_IOCTL_TEST_UNIT_READY 2 @@ -7,14 +11,13 @@ #define SCSI_IOCTL_SYNC 4 /* Request synchronous parameters */ #define SCSI_IOCTL_START_UNIT 5 #define SCSI_IOCTL_STOP_UNIT 6 + /* The door lock/unlock constants are compatible with Sun constants for the cdrom */ #define SCSI_IOCTL_DOORLOCK 0x5380 /* lock the eject mechanism */ #define SCSI_IOCTL_DOORUNLOCK 0x5381 /* unlock the mechanism */ /* - * Here are some obsolete SCSI-specific ioctl commands. - * * Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395 */ @@ -32,10 +35,6 @@ /* Used to obtain the PCI location of a device */ #define SCSI_IOCTL_GET_PCI 0x5387 -#ifdef __KERNEL__ - -struct scsi_device; - /* * Structures used for scsi_ioctl et al. */ @@ -51,10 +50,4 @@ typedef struct scsi_idlun { __u32 host_unique_id; } Scsi_Idlun; - -int scsi_ioctl_block_when_processing_errors(struct scsi_device *sdev, - int cmd, bool ndelay); -extern int scsi_ioctl(struct scsi_device *, int, void __user *); - -#endif /* __KERNEL__ */ -#endif /* _SCSI_IOCTL_H */ +#endif /* _UAPI_LINUX_SCSI_IOCTL_H */ diff --git a/include/scsi/sg.h b/include/uapi/linux/sg.h similarity index 91% copy from include/scsi/sg.h copy to include/uapi/linux/sg.h index 370c78c37926..1ffa5f85b26e 100644 --- a/include/scsi/sg.h +++ b/include/uapi/linux/sg.h @@ -1,7 +1,5 @@ -#ifndef _SCSI_GENERIC_H -#define _SCSI_GENERIC_H - -#include <linux/compiler.h> +#ifndef _UAPI_LINUX_SG_H +#define _UAPI_LINUX_SG_H /* * History: @@ -28,10 +26,6 @@ * For utility and test programs see: http://sg.danny.cz/sg/sg3_utils.html */ -#ifdef __KERNEL__ -extern int sg_big_buff; /* for sysctl */ -#endif - typedef struct sg_iovec /* same structure as used by readv() Linux system */ { /* call. It defines one scatter-gather element. */ @@ -184,30 +178,19 @@ typedef struct sg_req_info { /* used by SG_GET_REQUEST_TABLE ioctl() */ #define SG_GET_KEEP_ORPHAN 0x2288 /* yields scsi midlevel's access_count for this SCSI device */ -#define SG_GET_ACCESS_COUNT 0x2289 +#define SG_GET_ACCESS_COUNT 0x2289 -#define SG_SCATTER_SZ (8 * 4096) /* Largest size (in bytes) a single scatter-gather list element can have. The value used by the driver is 'max(SG_SCATTER_SZ, PAGE_SIZE)'. This value should be a power of 2 (and may be rounded up internally). If scatter-gather is not supported by adapter then this value is the largest data block that can be read/written by a single scsi command. */ - -#define SG_DEFAULT_RETRIES 0 - -/* Defaults, commented if they differ from original sg driver */ -#define SG_DEF_FORCE_LOW_DMA 0 /* was 1 -> memory below 16MB on i386 */ -#define SG_DEF_FORCE_PACK_ID 0 -#define SG_DEF_KEEP_ORPHAN 0 -#define SG_DEF_RESERVED_SIZE SG_SCATTER_SZ /* load time option */ +#define SG_SCATTER_SZ (8 * 4096) /* maximum outstanding requests, write() yields EDOM if exceeded */ #define SG_MAX_QUEUE 16 -#define SG_BIG_BUFF SG_DEF_RESERVED_SIZE /* for backward compatibility */ - - /* vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv */ /* The older SG interface based on the 'sg_header' structure follows. */ /* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ */ @@ -240,7 +223,7 @@ struct sg_header #define SG_SET_TIMEOUT 0x2201 /* unit: jiffies (10ms on i386) */ #define SG_GET_TIMEOUT 0x2202 /* yield timeout as _return_ value */ -/* Get/set command queuing state per fd (default is SG_DEF_COMMAND_Q. +/* Get/set command queuing state per fd. Each time a sg_io_hdr_t object is seen on this file descriptor, this command queuing flag is set on (overriding the previous setting). */ #define SG_GET_COMMAND_Q 0x2270 /* Yields 0 (queuing off) or 1 (on) */ @@ -254,15 +237,4 @@ struct sg_header number on the next write() on this file descriptor */ -/* Defaults, commented if they differ from original sg driver */ -#ifdef __KERNEL__ -#define SG_DEFAULT_TIMEOUT_USER (60*USER_HZ) /* HZ == 'jiffies in 1 second' */ -#else -#define SG_DEFAULT_TIMEOUT (60*HZ) /* HZ == 'jiffies in 1 second' */ -#endif - -#define SG_DEF_COMMAND_Q 0 /* command queuing is always on when - the new interface is used */ -#define SG_DEF_UNDERRUN_FLAG 0 - -#endif +#endif /* _UAPI_LINUX_SG_H */ -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html