freebsd-dev/cddl/lib/libdtrace/io.d
George V. Neville-Neil 3fac94ba94 Initial commit of an I/O provider for DTrace on FreeBSD.
These probes are most useful when looking into the structures
they provide, which are listed in io.d.  For example:

dtrace -n 'io:genunix::start { printf("%d\n", args[0]->bio_bcount); }'

Note that the I/O systems in FreeBSD and Solaris/Illumos are sufficiently
different that there is not a 1:1 mapping from scripts that work
with one to the other.
MFC after:	1 month
2012-07-11 16:27:02 +00:00

111 lines
3.9 KiB
D

/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
* $FreeBSD$
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#pragma D depends_on provider io
typedef struct devinfo {
int dev_major; /* major number */
int dev_minor; /* minor number */
int dev_instance; /* instance number */
string dev_name; /* name of device */
string dev_statname; /* name of device + instance/minor */
string dev_pathname; /* pathname of device */
} devinfo_t;
#pragma D binding "1.0" translator
translator devinfo_t < struct devstat *D > {
dev_major = D->device_number;
dev_minor = D->unit_number;
dev_instance = 0;
dev_name = stringof(D->device_name);
dev_statname = stringof(D->device_name);
dev_pathname = stringof(D->device_name);
};
typedef struct bufinfo {
int b_flags; /* flags */
long b_bcount; /* number of bytes */
caddr_t b_addr; /* buffer address */
uint64_t b_blkno; /* expanded block # on device */
uint64_t b_lblkno; /* block # on device */
size_t b_resid; /* # of bytes not transferred */
size_t b_bufsize; /* size of allocated buffer */
/* caddr_t b_iodone; I/O completion routine */
int b_error; /* expanded error field */
/* dev_t b_edev; extended device */
} bufinfo_t;
#pragma D binding "1.0" translator
translator bufinfo_t < struct bio *B > {
b_flags = B->bio_flags;
b_bcount = B->bio_bcount;
b_addr = B->bio_data;
b_blkno = 0;
b_lblkno = 0;
b_resid = B->bio_resid;
b_bufsize = 0; /* XXX gnn */
b_error = B->bio_error;
};
/*
* The following inline constants can be used to examine fi_oflags when using
* the fds[] array or a translated fileinfo_t. Note that the various open
* flags behave as a bit-field *except* for O_RDONLY, O_WRONLY, and O_RDWR.
* To test the open mode, you write code similar to that used with the fcntl(2)
* F_GET[X]FL command, such as: if ((fi_oflags & O_ACCMODE) == O_WRONLY).
*/
inline int O_ACCMODE = 0x0003;
#pragma D binding "1.1" O_ACCMODE
inline int O_RDONLY = 0x0000;
#pragma D binding "1.1" O_RDONLY
inline int O_WRONLY = 0x0001;
#pragma D binding "1.1" O_WRONLY
inline int O_RDWR = 0x0002;
#pragma D binding "1.1" O_RDWR
inline int O_APPEND = 0x0008;
#pragma D binding "1.1" O_APPEND
inline int O_CREAT = 0x0200;
#pragma D binding "1.1" O_CREAT
inline int O_EXCL = 0x0800;
#pragma D binding "1.1" O_EXCL
inline int O_NOCTTY = 0x8000;
#pragma D binding "1.1" O_NOCTTY
inline int O_NONBLOCK = 0x0004;
#pragma D binding "1.1" O_NONBLOCK
inline int O_NDELAY = 0x0004;
#pragma D binding "1.1" O_NDELAY
inline int O_SYNC = 0x0080;
#pragma D binding "1.1" O_SYNC
inline int O_TRUNC = 0x0400;
#pragma D binding "1.1" O_TRUNC