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* sg_io_v3.c: Include "print_fields.h".
(PRINT_FIELD_SG_IO_BUFFER): New macro.
(decode_request, decode_response): Use it, PRINT_FIELD_D, PRINT_FIELD_U,
PRINT_FIELD_X, PRINT_FIELD_PTR, PRINT_FIELD_FLAGS, and PRINT_FIELD_XVAL.
Turn print_sg_io_buffer into a universal sg_io buffer printer.
* sg_io_v3.c (print_sg_io_buffer): Add iovec_count argument.
Call tprint_iov_upto when iovec_count is non-zero.
(decode_request, decode_response): Do not call tprint_iov_upto directly,
use print_sg_io_buffer instead.
* sg_io_v4.c: Likewise.
The SCSI driver, starting with kernel commit v2.6.25-rc1~1230^2~78,
translates its "struct request.errors" to ioctl errors after
filling in all the output members of the SG_IO header structure.
As there is no easy way to tell SCSI layer errors from other syscall
errors, decode the structure on exiting syscall in case of syserror,
too.
* scsi.c (scsi_ioctl): Do not call set_tcb_priv_ulong, use
get_tcb_priv_data instead of get_tcb_priv_ulong, call decode_sg_io
unconditionally.
* sg_io_v3.c (decode_request): Save a copy of struct_sg_io_hdr using
set_tcb_priv_data.
(decode_response): Restore it using get_tcb_priv_data. Print its i/o
fields when umove call fails. Pass IOV_DECODE_STR to tprint_iov_upto
unconditionally.
* sg_io_v4.c (decode_request): Save a copy of struct sg_io_v4 using
set_tcb_priv_data.
(decode_response): Restore it using get_tcb_priv_data. Print its i/o
fields when umove call fails. Pass IOV_DECODE_STR to tprint_iov_upto
unconditionally.
The formerly used format string %02x led to misleading output as there
was no clear indication sometimes whether the printed integer was
decimal or hexadecimal.
* sg_io_v3.c (decode_response): Print status and masked_status fields
using %#x format specifier instead of %02x.
Print struct sg_io_hdr.info and struct sg_io_v4.info using printflags.
* xlat/sg_io_info.in: New file.
* defs.h (sg_io_info): New xlat prototype.
* sg_io_v3.c: Include "xlat/sg_io_info.h".
(decode_response): Print struct_sg_io_hdr.info using printflags.
* sg_io_v4.c: (decode_response): Print struct sg_io_v4.info
using printflags.
Print struct sg_io_hdr.flags and struct sg_io_v4.flags using printflags.
* xlat/sg_io_flags.in: New file.
* sg_io_v3.c: Include "xlat/sg_io_flags.h".
(decode_request): Print struct_sg_io_hdr.flags using printflags.
* xlat/bsg_flags.in: New file.
* sg_io_v4.c: Include "xlat/bsg_flags.h".
(decode_request): Print struct sg_io_v4.flags using printflags.
struct sg_io_hdr contains pointers and therefore has to be mpersified.
* defs.h (decode_sg_io_v3): Remove prototype.
* sg_io_v3.c (struct_sg_io_hdr): Typedef to struct sg_io_hdr.
Mpersify it.
(decode_sg_io_v3): Wrap into MPERS_PRINTER_DECL.
