MPTSCSIH_PROC_INFO(9) Message-based devices MPTSCSIH_PROC_INFO(9)NAME
mptscsih_proc_info - Return information about MPT adapter
SYNOPSIS
int mptscsih_proc_info(struct Scsi_Host * host, char * buffer, char ** start, off_t offset, int length, int func);
ARGUMENTS
host
scsi host struct
buffer
if write, user data; if read, buffer for user
start
returns the buffer address
offset
if write, 0; if read, the current offset into the buffer from the previous read.
length
if write, return length;
func
write = 1; read = 0
DESCRIPTION
(linux scsi_host_template.info routine)
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 MPTSCSIH_PROC_INFO(9)
Check Out this Related Man Page
G_DATA(9) BSD Kernel Developer's Manual G_DATA(9)NAME
g_read_data, g_write_data -- read/write data from/to GEOM consumer
SYNOPSIS
#include <geom/geom.h>
void *
g_read_data(struct g_consumer *cp, off_t offset, off_t length, int *error);
int
g_write_data(struct g_consumer *cp, off_t offset, void *ptr, off_t length);
DESCRIPTION
The g_read_data() function reads length bytes of data from the provider attached to consumer cp, starting at offset offset. The buffer
returned from g_read_data() is allocated with g_malloc(), so it should be freed by the caller with g_free() after use. If the operation
fails, an error value will be stored in the error argument if it is not NULL.
The g_write_data() function writes length bytes of data from the buffer pointed to by ptr to the provider attached to consumer cp, starting
at offset offset.
RESTRICTIONS /CONDITIONS
The length argument should be a multiple of the provider's sectorsize and less than or equal to DFLTPHYS (DFLTPHYS is defined in
<sys/param.h>).
The topology lock must not be held.
RETURN VALUES
The g_read_data() function returns a pointer to a data buffer or NULL if an error occurred. In that case an error value is stored in the
error argument unless it is NULL.
The g_write_data() function returns 0 if successful; otherwise an error code is returned.
ERRORS
Possible errors:
[EIO] An I/O error occurred while reading from or writing to the consumer.
SEE ALSO geom(4), DECLARE_GEOM_CLASS(9), g_access(9), g_attach(9), g_bio(9), g_consumer(9), g_event(9), g_geom(9), g_provider(9),
g_provider_by_name(9), g_wither_geom(9)AUTHORS
This manual page was written by Pawel Jakub Dawidek <pjd@FreeBSD.org>.
BSD January 16, 2004 BSD
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