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arm	[ DIR ]	drwxr-xr-x
arm64	[ DIR ]	drwxr-xr-x
i386	[ DIR ]	drwxr-xr-x
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atomic.stp	1.52 KB	-rw-r--r--
aux_syscalls.stp	139.14 KB	-rw-r--r--
context-caller.stp	3.07 KB	-rw-r--r--
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conversions-guru.stp	5.56 KB	-rw-r--r--
conversions.stp	10.92 KB	-rw-r--r--
ctime.stp	5.32 KB	-rw-r--r--
dentry.stp	9.79 KB	-rw-r--r--
dev.stp	1.79 KB	-rw-r--r--
endian.stp	602 B	-rw-r--r--
guru-delay.stp	1.2 KB	-rw-r--r--
guru-signal.stp	1.07 KB	-rw-r--r--
inet.stp	1.42 KB	-rw-r--r--
inet_sock.stp	1.31 KB	-rw-r--r--
ioblock.stp	12.55 KB	-rw-r--r--
ioscheduler.stp	11.74 KB	-rw-r--r--
ip.stp	5.23 KB	-rw-r--r--
ipmib-filter-default.stp	965 B	-rw-r--r--
ipmib.stp	12.55 KB	-rw-r--r--
irq.stp	5 KB	-rw-r--r--
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kprocess.stp	4.38 KB	-rw-r--r--
kretprobe.stp	2.1 KB	-rw-r--r--
linuxmib-filter-default.stp	876 B	-rw-r--r--
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loadavg.stp	1.87 KB	-rw-r--r--
logging.stp	2.08 KB	-rw-r--r--
memory.stp	17.77 KB	-rw-r--r--
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netfilter.stp	31.56 KB	-rw-r--r--
networking.stp	7.17 KB	-rw-r--r--
nfs.stp	37.86 KB	-rw-r--r--
nfs_proc.stp	55.3 KB	-rw-r--r--
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panic.stp	1.07 KB	-rw-r--r--
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task_ancestry.stp	1.57 KB	-rw-r--r--
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tcp.stp	21.98 KB	-rw-r--r--
tcpmib-filter-default.stp	885 B	-rw-r--r--
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timestamp.stp	1.72 KB	-rw-r--r--
timestamp_gtod.stp	1.59 KB	-rw-r--r--
timestamp_monotonic.stp	5.12 KB	-rw-r--r--
tty.stp	7.15 KB	-rw-r--r--
tzinfo.stp	803 B	-rw-r--r--
ucontext-symbols.stp	8.62 KB	-rw-r--r--
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udp.stp	5.73 KB	-rw-r--r--
utrace.stp	1.33 KB	-rw-r--r--
vfs.stp	26.83 KB	-rw-r--r--

Code Editor : ioblock.stp

// Block I/O tapset
// Copyright (C) 2006 Intel Corp.
// Copyright (C) 2006 IBM Corp.
// Copyright (C) 2014 Red Hat Inc.
//
// This file is part of systemtap, and is free software.  You can
// redistribute it and/or modify it under the terms of the GNU General
// Public License (GPL); either version 2, or (at your option) any
// later version.

%{
#include <linux/bio.h>
#include <linux/genhd.h>
#ifdef STAPCONF_BLK_TYPES
#include <linux/blk_types.h>
#else
#define REQ_WRITE               (1 << BIO_RW)
#endif
%}

/* get i-node number of mapped file */
function __bio_ino:long(bio:long)
%{ /* pure */
    struct bio *bio = (struct bio *)(long)STAP_ARG_bio;
    struct page *bv_page = ((bio && kread(&(bio->bi_vcnt)))
			    ? kread(&(bio->bi_io_vec[0].bv_page)) : NULL);

STAP_RETVALUE = -1;
    if (bv_page) {
	/* Before calling PageSlab() and PageSwapCache() on bv_page, we
	 * need to make sure the bv_page struct is valid. */
	(void)kderef_buffer(NULL, bv_page, sizeof(struct page));

if (!PageSlab(bv_page) && !PageSwapCache(bv_page)) {
	    struct address_space *mapping = kread(&(bv_page->mapping));
	    if (mapping && ((unsigned long)mapping & PAGE_MAPPING_ANON) == 0) {
		struct inode *host = kread(&(mapping->host));
		if (host)
		    STAP_RETVALUE = kread(&(host->i_ino));
	    }
	}
    }
    CATCH_DEREF_FAULT();
%}

/* returns 0 for read, 1 for write */
function bio_rw_num:long(rw:long)
{
    return (rw & %{ /* pure */ REQ_WRITE %})
}

/* returns R for read, W for write */
function bio_rw_str(rw:long)
{
    return bio_rw_num(rw) == BIO_READ ? "R" : "W"
}

/* returns start sector */
function __bio_start_sect:long(bio:long)
{
    try {
        return @cast(bio, "bio")->bi_bdev->bd_part->start_sect
    } catch {
        return -1
    }
}

/* returns the block device name */
function __bio_devname:string(bio:long)
{
    return bdevname(@cast(bio, "bio")->bi_bdev)
}

global BIO_READ = 0, BIO_WRITE = 1

/**
 * probe ioblock.request - Fires whenever making a generic block I/O request.
 * @name      : name of the probe point
 * @devname   : block device name
 * @ino       : i-node number of the mapped file
 * @sector    : beginning sector for the entire bio
 * @flags     : see below
 * 	    BIO_UPTODATE    0       ok after I/O completion
 * 	    BIO_RW_BLOCK    1       RW_AHEAD set, and read/write would block
 * 	    BIO_EOF         2       out-out-bounds error
 * 	    BIO_SEG_VALID   3       nr_hw_seg valid 
 * 	    BIO_CLONED      4       doesn't own data
 * 	    BIO_BOUNCED     5       bio is a bounce bio
 * 	    BIO_USER_MAPPED 6       contains user pages
 * 	    BIO_EOPNOTSUPP  7       not supported
 * @rw        : binary trace for read/write request
 * @vcnt      : bio vector count which represents number of array element (page, offset, length) which make up this I/O request
 * @idx       : offset into the bio vector array
 * @phys_segments : number of segments in this bio after physical address coalescing is performed
 * @hw_segments :   number of segments after physical and DMA remapping hardware coalescing is performed
 * @size      : total size in bytes
 * @bdev      : target block device
 * @bdev_contains : points to the device object which contains the partition (when bio structure represents a partition)
 * @p_start_sect :  points to the start sector of the partition structure of the device
 *
 * Context:
 *  The process makes block I/O request
 */
probe ioblock.request = kernel.function ("generic_make_request")
{
	name = "ioblock.request"
        devname = __bio_devname($bio)
        ino = __bio_ino($bio)

sector = @choose_defined($bio->bi_iter->bi_sector, $bio->bi_sector)
        flags = $bio->bi_flags
        rw = $bio->bi_rw
        vcnt = $bio->bi_vcnt
        idx = @choose_defined($bio->bi_iter->bi_idx, $bio->bi_idx)
        phys_segments = $bio->bi_phys_segments
	hw_segments = @choose_defined($bio->bi_hw_segments, 0)
        size = @choose_defined($bio->bi_iter->bi_size, $bio->bi_size)

bdev = $bio->bi_bdev
        bdev_contains = $bio->bi_bdev->bd_contains
        p_start_sect = __bio_start_sect($bio)
}

/**
 * probe ioblock.end - Fires whenever a block I/O transfer is complete.
 * @name      : name of the probe point
 * @devname   : block device name
 * @ino       : i-node number of the mapped file
 * @bytes_done : number of bytes transferred
 * @sector    : beginning sector for the entire bio
 * @flags     : see below
 *      BIO_UPTODATE    0       ok after I/O completion
 *      BIO_RW_BLOCK    1       RW_AHEAD set, and read/write would block
 *      BIO_EOF         2       out-out-bounds error
 *      BIO_SEG_VALID   3       nr_hw_seg valid
 *      BIO_CLONED      4       doesn't own data
 *      BIO_BOUNCED     5       bio is a bounce bio
 *      BIO_USER_MAPPED 6       contains user pages
 *      BIO_EOPNOTSUPP  7       not supported
 * @error     : 0 on success
 * @rw        : binary trace for read/write request
 * @vcnt      : bio vector count which represents number of array element (page, offset, length) which makes up this I/O request
 * @idx       : offset into the bio vector array
 * @phys_segments : number of segments in this bio after physical address coalescing is performed.
 * @hw_segments :   number of segments after physical and DMA remapping hardware coalescing is performed
 * @size      : total size in bytes
 *
 * Context:
 *  The process signals the transfer is done.
 */
probe ioblock.end = kernel.function("bio_endio")
{
	name = "ioblock.end"
        devname = __bio_devname($bio)
        ino = __bio_ino($bio)

bytes_done = @choose_defined($bytes_done,
				     @choose_defined($bio->bi_iter->bi_size,
						     $bio->bi_size))
        error = @choose_defined($error,$bio->bi_error)

/**
 * probe ioblock_trace.bounce - Fires whenever a buffer bounce is needed for at least one page of a block IO request.
 * @name      : name of the probe point
 * @q         : request queue on which this bio was queued.
 * @devname   : device for which a buffer bounce was needed.
 * @ino       : i-node number of the mapped file
 * @bytes_done : number of bytes transferred
 * @sector    : beginning sector for the entire bio
 * @flags     : see below
 *     BIO_UPTODATE    0       ok after I/O completion
 *     BIO_RW_BLOCK    1       RW_AHEAD set, and read/write would block
 *     BIO_EOF         2       out-out-bounds error
 *     BIO_SEG_VALID   3       nr_hw_seg valid
 *     BIO_CLONED      4       doesn't own data
 *     BIO_BOUNCED     5       bio is a bounce bio
 *     BIO_USER_MAPPED 6       contains user pages
 *     BIO_EOPNOTSUPP  7       not supported
 * @rw        : binary trace for read/write request
 * @vcnt      : bio vector count which represents number of array element (page, offset, length) which makes up this I/O request
 * @idx       : offset into the bio vector array
 * @phys_segments - number of segments in this bio after physical address coalescing is performed.
 * @size      : total size in bytes
 * @bdev      : target block device
 * @bdev_contains : points to the device object which contains the partition (when bio structure represents a partition)
 * @p_start_sect :  points to the start sector of the partition structure of the device
 *
 * Context :
 *	The process creating a block IO request.
 */
probe ioblock_trace.bounce = kernel.trace("block_bio_bounce")
{
	name = "ioblock_trace.bounce"
	q = $q
        devname = __bio_devname($bio)
        ino = __bio_ino($bio)

bytes_done = @choose_defined($bio->bi_iter->bi_size, $bio->bi_size)
        sector = @choose_defined($bio->bi_iter->bi_sector, $bio->bi_sector)
        flags = $bio->bi_flags
        rw = $bio->bi_rw
        vcnt = $bio->bi_vcnt
        idx = @choose_defined($bio->bi_iter->bi_idx, $bio->bi_idx)
        phys_segments = $bio->bi_phys_segments
        size = @choose_defined($bio->bi_iter->bi_size, $bio->bi_size)
        bdev_contains = $bio->bi_bdev->bd_contains
        bdev = $bio->bi_bdev
        p_start_sect = __bio_start_sect($bio)
}

/**
 * probe ioblock_trace.request - Fires just as a generic block I/O request is created for a bio.
 * @name      : name of the probe point
 * @q         : request queue on which this bio was queued.
 * @devname   : block device name
 * @ino       : i-node number of the mapped file
 * @bytes_done : number of bytes transferred
 * @sector    : beginning sector for the entire bio
 * @flags     : see below
 *	    BIO_UPTODATE    0       ok after I/O completion
 *	    BIO_RW_BLOCK    1       RW_AHEAD set, and read/write would block
 *	    BIO_EOF         2       out-out-bounds error
 *	    BIO_SEG_VALID   3       nr_hw_seg valid
 *	    BIO_CLONED      4       doesn't own data
 *	    BIO_BOUNCED     5       bio is a bounce bio
 *	    BIO_USER_MAPPED 6       contains user pages
 *	    BIO_EOPNOTSUPP  7       not supported
 * @rw        : binary trace for read/write request
 * @vcnt      : bio vector count which represents number of array element (page, offset, length) which make up this I/O request
 * @idx       : offset into the bio vector array
 * @phys_segments - number of segments in this bio after physical address coalescing is performed.
 * @size      : total size in bytes
 * @bdev      : target block device
 * @bdev_contains : points to the device object which contains the partition (when bio structure represents a partition)
 * @p_start_sect :  points to the start sector of the partition structure of the device
 *
 * Context:
 *  The process makes block I/O request
 */
probe ioblock_trace.request = kernel.trace("block_bio_queue")
{
	name = "ioblock_trace.request"
	q = $q
        devname = __bio_devname($bio)
        ino = __bio_ino($bio)

/**
 * probe ioblock_trace.end - Fires whenever a block I/O transfer is complete.
 * @name      : name of the probe point
 * @q         : request queue on which this bio was queued.
 * @devname   : block device name
 * @ino       : i-node number of the mapped file
 * @bytes_done : number of bytes transferred
 * @sector    : beginning sector for the entire bio
 * @flags     : see below
 *      BIO_UPTODATE    0       ok after I/O completion
 *      BIO_RW_BLOCK    1       RW_AHEAD set, and read/write would block
 *      BIO_EOF         2       out-out-bounds error
 *      BIO_SEG_VALID   3       nr_hw_seg valid
 *      BIO_CLONED      4       doesn't own data
 *      BIO_BOUNCED     5       bio is a bounce bio
 *      BIO_USER_MAPPED 6       contains user pages
 *      BIO_EOPNOTSUPP  7       not supported
 * @rw        : binary trace for read/write request
 * @vcnt      : bio vector count which represents number of array element (page, offset, length) which makes up this I/O request
 * @idx       : offset into the bio vector array
 * @phys_segments - number of segments in this bio after physical address coalescing is performed.
 * @size      : total size in bytes
 * @bdev      : target block device
 * @bdev_contains : points to the device object which contains the partition (when bio structure represents a partition)
 * @p_start_sect :  points to the start sector of the partition structure of the device
 *
 * Context:
 *  The process signals the transfer is done.
 */
probe ioblock_trace.end = kernel.trace("block_bio_complete")
{
	name = "ioblock_trace.end"
	q = $q
        devname = __bio_devname($bio)
        ino = __bio_ino($bio)

bytes_done = @choose_defined($bio->bi_iter->bi_size, $bio->bi_size)

sector = @choose_defined($bio->bi_iter->bi_sector, $bio->bi_sector)
        flags = $bio->bi_flags
        rw = $bio->bi_rw
        vcnt = $bio->bi_vcnt
        idx = @choose_defined($bio->bi_iter->bi_idx, $bio->bi_idx)
        phys_segments = $bio->bi_phys_segments
        size = @choose_defined($bio->bi_iter->bi_size, $bio->bi_size)
        bdev_contains = $bio->bi_bdev->bd_contains
        bdev = $bio->bi_bdev
        p_start_sect = __bio_start_sect($bio)
}

${this.title}

Code Editor : ioblock.stp