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// vfs tapset
// Copyright (C) 2006-2007 IBM Corp.
// Copyright (C) 2007 Intel Corporation.
// Copyright (C) 2007 Bull S.A.S
// Copyright (c) 2008-2015 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/uaccess.h> /* For VERIFY_READ/VERIFY_WRITE */
#include <linux/uio.h> /* For ITER_IOVEC */
#include <linux/types.h> /* For struct list_head */
#include <linux/mm_types.h> /* For struct page */
/* Define our own page size macro. */
#ifdef PAGE_CACHE_SIZE
#define _STP_PAGE_SIZE PAGE_CACHE_SIZE
#else
#define _STP_PAGE_SIZE PAGE_SIZE
#endif
%}
/* generic vfs probes */
/*
We don't want to have to do a bdevname() call every time
we want a devname, so we'll hash them here.
*/
function __find_bdevname:string(dev:long, bdev:long)
{
/* bdevname() can't do anything without an actual bdev, so let's just
* return the same result early without wasting space in __devnames. */
if (bdev == 0)
return "N/A"
return bdevname(bdev)
}
%(systemtap_v < "2.3" %?
/* deprecated */
function ppos_pos:long (ppos:long)
{
return kernel_pointer(ppos)
}
%)
@__private30 function __address_inode:long (page:long)
{
mapping = page? @cast(page, "page", "kernel")->mapping : 0
if (mapping == 0)
return -1
else
return @cast(mapping, "address_space", "kernel")->host
}
function __page_ino:long (page:long)
{
host = __address_inode(page)
if (host == -1)
return -1
else
return @cast(host, "inode", "kernel")->i_ino
}
function __page_dev:long (page:long)
{
host = __address_inode(page)
if (host == -1)
return -1
return @cast(host, "inode", "kernel")->i_sb->s_dev
}
function __page_bdev:long (page:long)
{
host = __address_inode(page)
if (host == -1)
return 0
return @cast(host, "inode", "kernel")->i_sb->s_bdev
}
@__private30 function __page_index:long (page:long)
{
return @cast(page, "page", "kernel")->index
}
function __file_dev:long (file:long)
{
d_inode = __file_inode(file)
if (d_inode == 0)
return 0
return @cast(d_inode, "inode", "kernel")->i_sb->s_dev
}
@__private30 function __file_bdev:long (file:long)
{
d_inode = __file_inode(file)
if (d_inode == 0)
return 0
return @cast(d_inode, "inode", "kernel")->i_sb->s_bdev
}
function __file_ino:long (file:long)
{
d_inode = __file_inode(file)
if (d_inode == 0)
return 0
return @cast(d_inode, "inode", "kernel")->i_ino
}
function __file_maxbytes:long (file:long)
{
d_inode = __file_inode(file)
if (d_inode == 0)
return 0
return @cast(d_inode, "inode", "kernel")->i_sb->s_maxbytes
}
function __file_filename:string (file:long)
{
dentry = file
? @choose_defined(@cast(file, "file", "kernel")->f_path->dentry,
@cast(file, "file", "kernel")->f_dentry)
: 0
name = dentry? @cast(dentry, "dentry", "kernel")->d_name->name : 0
if (name == 0)
return "NULL"
else
return kernel_string(name)
}
@__private30 function _get_fopv_size:long (iovp:long, nr_segs:long)
{
if (iovp) {
val = 0
for (i = 0; i < nr_segs; i++)
val += @cast(iovp, "iovec")[i]->iov_len
return val
}
return -1
}
%(systemtap_v < "2.3" %?
/* deprecated */
function _dev_minor:long (dev:long)
{
return MINOR(dev)
}
/* deprecated */
function _dev_major:long (dev:long)
{
return MAJOR(dev)
}
%)
@__private30 function __get_first_page:long (pages:long)
%{ /* pure */
struct list_head *pages = (struct list_head *)(uintptr_t)STAP_ARG_pages;
/* We call kderef_buffer() here to ensure the memory is valid
* to read. Note the result is thrown away, then we use the
* "real" list_entry() function now that we know the address
* is safe. */
(void)kderef_buffer(NULL, pages, sizeof(*pages));
STAP_RETVALUE = (uintptr_t)list_entry(pages->prev, struct page, lru);
CATCH_DEREF_FAULT();
%}
probe generic.fop.llseek = kernel.function("generic_file_llseek")
{
dev = __file_dev($file)
devname = __find_bdevname(dev, __file_bdev($file))
ino = __file_ino($file)
file = $file
pathname = fullpath_struct_file(task_current(), $file)
offset = $offset
%(systemtap_v < "2.3" %?
origin = @choose_defined($whence, $origin)
%)
whence = @choose_defined($whence, $origin)
whence_str = _seek_whence_str(@choose_defined($whence, $origin))
maxbyte = __file_maxbytes($file)
name = "generic_file_llseek"
argstr = sprintf("%d, %d", $offset, @choose_defined($whence, $origin))
}
probe generic.fop.llseek.return = kernel.function("generic_file_llseek").return
{
name = "generic_file_llseek"
retstr = sprintf("%d", $return)
file = @entry($file)
pathname = fullpath_struct_file(task_current(), @entry($file))
offset = @entry($offset)
%(systemtap_v < "2.3" %?
origin = @entry(@choose_defined($whence, $origin))
%)
whence = @entry(@choose_defined($whence, $origin))
whence_str = @entry(_seek_whence_str(@choose_defined($whence, $origin)))
error = $return < 0 ? $return : 0
error_str = error ? errno_str(error) : ""
}
probe generic.fop.aio_read =
kernel.function("__generic_file_aio_read") !,
kernel.function("generic_file_aio_read") ?
{
file = $iocb->ki_filp
pathname = fullpath_struct_file(task_current(), $iocb->ki_filp)
dev = __file_dev($iocb->ki_filp)
devname = __find_bdevname(dev, __file_bdev($iocb->ki_filp))
ino = __file_ino($iocb->ki_filp)
pos = @choose_defined($pos, kernel_pointer($ppos))
buf = $iov->iov_base
count = __iov_length($iov, $nr_segs, 1, @const("VERIFY_WRITE"))
name = "generic_file_aio_read"
argstr = sprintf("%d, %d, %p", count, pos, buf)
size = count
units = "bytes"
}
probe generic.fop.aio_read.return =
kernel.function("__generic_file_aio_read").return !,
kernel.function("generic_file_aio_read").return ?
{
file = @entry($iocb->ki_filp)
pathname = fullpath_struct_file(task_current(), @entry($iocb->ki_filp))
nr_segs = @entry($nr_segs)
name = "generic_file_aio_read"
retstr = sprintf("%d", $return)
bytes_read = $return > 0 ? $return : 0
error = $return < 0 ? $return : 0
error_str = error ? errno_str(error) : ""
if ($return > 0) {
size = $return
units = "bytes"
}
}
probe generic.fop.read_iter = kernel.function("generic_file_read_iter") ?
{
file = $iocb->ki_filp
pathname = fullpath_struct_file(task_current(), $iocb->ki_filp)
dev = __file_dev($iocb->ki_filp)
devname = __find_bdevname(dev, __file_bdev($iocb->ki_filp))
ino = __file_ino($iocb->ki_filp)
pos = $iter->iov_offset
if ($iter->type & @const("ITER_IOVEC")) {
buf = $iter->iov->iov_base
count = __iov_length($iter->iov, $iter->nr_segs, 1,
@const("VERIFY_WRITE"))
}
else {
buf = 0
count = 0
}
name = "generic_file_read_iter"
argstr = sprintf("%d, %d, %p", count, pos, buf)
size = count
units = "bytes"
}
probe generic.fop.read_iter.return =
kernel.function("generic_file_read_iter").return ?
{
file = @entry($iocb->ki_filp)
pathname = fullpath_struct_file(task_current(), @entry($iocb->ki_filp))
nr_segs = @entry($iter->nr_segs)
name = "generic_file_read_iter"
retstr = sprintf("%d", $return)
bytes_read = $return > 0 ? $return : 0
error = $return < 0 ? $return : 0
error_str = error ? errno_str(error) : ""
if ($return > 0) {
size = $return
units = "bytes"
}
}
probe generic.fop.aio_write = kernel.function("generic_file_aio_write") ?
{
file = $iocb->ki_filp
pathname = fullpath_struct_file(task_current(), $iocb->ki_filp)
dev = __file_dev($iocb->ki_filp)
devname = __find_bdevname(dev, __file_bdev($iocb->ki_filp))
ino = __file_ino($iocb->ki_filp)
pos = $pos
count = (@defined($iov)
? __iov_length($iov, $nr_segs, 1, @const("VERIFY_READ"))
: $count)
buf = @choose_defined($iov->iov_base, $buf)
name = "generic_file_aio_write"
argstr = sprintf("%d, %d, %p", count, pos, buf)
size = count
units = "bytes"
}
probe generic.fop.aio_write.return =
kernel.function("generic_file_aio_write").return ?
{
file = @entry($iocb->ki_filp)
pathname = fullpath_struct_file(task_current(), @entry($iocb->ki_filp))
name = "generic_file_aio_write"
retstr = sprintf("%d", $return)
if ($return > 0) {
size = $return
units = "bytes"
}
}
probe generic.fop.write_iter = kernel.function("generic_file_write_iter") ?
{
file = $iocb->ki_filp
pathname = fullpath_struct_file(task_current(), $iocb->ki_filp)
dev = __file_dev($iocb->ki_filp)
devname = __find_bdevname(dev, __file_bdev($iocb->ki_filp))
ino = __file_ino($iocb->ki_filp)
pos = $from->iov_offset
if ($from->type & @const("ITER_IOVEC")) {
buf = $from->iov->iov_base
count = __iov_length($from->iov, $from->nr_segs, 1,
@const("VERIFY_READ"))
}
else {
buf = 0
count = 0
}
name = "generic_file_write_iter"
argstr = sprintf("%d, %d, %p", count, pos, buf)
size = count
units = "bytes"
}
probe generic.fop.write_iter.return =
kernel.function("generic_file_write_iter").return ?
{
file = @entry($iocb->ki_filp)
pathname = fullpath_struct_file(task_current(), @entry($iocb->ki_filp))
name = "generic_file_write_iter"
retstr = sprintf("%d", $return)
if ($return > 0) {
size = $return
units = "bytes"
}
}
probe generic.fop.readv = kernel.function("generic_file_readv") ?
{
dev = __file_dev($filp)
devname = __find_bdevname(dev, __file_bdev($filp))
ino = __file_ino($filp)
file = $filp
pathname = fullpath_struct_file(task_current(), $filp)
nr_segs = $nr_segs
pos = kernel_pointer($ppos)
name = "generic_file_readv"
argstr = sprintf("%d, %d", $nr_segs, pos)
size = nr_segs
units = "segs"
}
probe generic.fop.readv.return = kernel.function("generic_file_readv").return ?
{
file = @entry($filp)
pathname = fullpath_struct_file(task_current(), @entry($filp))
name = "generic_file_readv"
retstr = sprintf("%d", $return)
bytes_read = $return > 0 ? $return : 0
error = $return < 0 ? $return : 0
error_str = error ? errno_str(error) : ""
if ($return > 0) {
size = $return
units = "bytes"
}
}
/* calls __generic_file_write_nolock */
probe generic.fop.writev = kernel.function("generic_file_writev") ?
{
dev = __file_dev($file)
devname = __find_bdevname(dev, __file_bdev($file))
ino = __file_ino($file)
file = $file
pathname = fullpath_struct_file(task_current(), $file)
nr_segs = $nr_segs
pos = kernel_pointer($ppos)
name = "generic_file_writev"
argstr = sprintf("%d, %d", $nr_segs, pos)
size = nr_segs
units = "segs"
}
probe generic.fop.writev.return =
kernel.function("generic_file_writev").return ?
{
file = @entry($file)
pathname = fullpath_struct_file(task_current(), @entry($file))
name = "generic_file_writev"
retstr = sprintf("%d", $return)
bytes_written = $return > 0 ? $return : 0
error = $return < 0 ? $return : 0
error_str = error ? errno_str(error) : ""
if ($return > 0) {
size = $return
units = "bytes"
}
}
/* checks for aops->readpage, if not defined, return -ENOEXEC
else assigns generic_file_vm_ops to vma
add filemap_nopage, filemap_populate */
probe generic.fop.mmap = kernel.function("generic_file_mmap")
{
file = $file
pathname = fullpath_struct_file(task_current(), $file)
dev = __file_dev($file)
devname = __find_bdevname(dev, __file_bdev($file))
ino = __file_ino($file)
vm_start = $vma->vm_start
vm_end = $vma->vm_end
vm_flags = $vma->vm_flags
name = "generic_file_mmap"
argstr = sprintf("0x%x, 0x%x, 0x%x", $vma->vm_start,
$vma->vm_end, $vma->vm_flags)
}
probe generic.fop.mmap.return = kernel.function("generic_file_mmap").return
{
file = @entry($file)
pathname = fullpath_struct_file(task_current(), @entry($file))
name = "generic_file_mmap"
retstr = sprintf("%d", $return)
error = $return < 0 ? $return : 0
error_str = error ? errno_str(error) : ""
}
probe generic.fop.open = kernel.function("generic_file_open")
{
dev = __file_dev($filp)
devname = __find_bdevname(dev, __file_bdev($filp))
ino = $inode->i_ino
file = $filp
filename = __file_filename($filp)
pathname = fullpath_struct_file(task_current(), $filp)
flag = $filp->f_flags
size = $inode->i_size
name = "generic_file_open"
argstr = sprintf("%d, %d, %s", $inode->i_ino, $filp->f_flags, filename)
}
probe generic.fop.open.return = kernel.function("generic_file_open").return
{
name = "generic_file_open"
retstr = sprintf("%d", $return)
}
probe generic.fop.sendfile = kernel.function("generic_file_sendfile") ?
{
dev = __file_dev($in_file)
devname = __find_bdevname($in_file, __file_bdev($in_file))
ino = __file_ino($in_file)
file = $in_file
pathname = fullpath_struct_file(task_current(), $in_file)
count = $count
ppos = $ppos
name = "generic_file_sendfile"
argstr = sprintf("%d", $count)
size = $count
units = "bytes"
}
probe generic.fop.sendfile.return =
kernel.function("generic_file_sendfile").return ?
{
name = "generic_file_sendfile"
retstr = sprintf("%d", $return)
if ($return > 0) {
size = $return
units = "bytes"
}
}
probe generic.fop.splice_read = kernel.function("generic_file_splice_read") ?
{
dev = __file_dev($in)
devname = __find_bdevname(dev, __file_bdev($in))
ino = __file_ino($in)
file = $in
pathname = fullpath_struct_file(task_current(), $in)
dev_major = MAJOR(dev)
dev_minor = MINOR(dev)
len = $len
flags = $flags
name = "generic_file_splice_read"
argstr = sprintf("%d, %x", $len, $flags)
size = $len
units = "bytes"
}
probe generic.fop.splice_read.return =
kernel.function("generic_file_splice_read").return ?
{
name = "generic_file_splice_read"
retstr = sprintf("%d", $return)
file = @entry($in)
pathname = fullpath_struct_file(task_current(), @entry($in))
ino = __file_ino(@entry($in))
dev = __file_dev(@entry($in))
dev_major = MAJOR(dev)
dev_minor = MINOR(dev)
ret = $return
error = $return < 0 ? $return : 0
error_str = error ? errno_str(error) : ""
if ($return > 0) {
size = $return
units = "bytes"
}
}
probe generic.fop.splice_write = kernel.function("generic_file_splice_write") ?
{
dev = __file_dev($out)
devname = __find_bdevname(dev, __file_bdev($out))
ino = __file_ino($out)
file = $out
pathname = fullpath_struct_file(task_current(), $out)
len = $len
flags = $flags
name = "generic_file_splice_write"
argstr = sprintf("%d, %x", $len, $flags)
size = $len
units = "bytes"
}
probe generic.fop.splice_write.return =
kernel.function("generic_file_splice_write").return ?
{
name = "generic_file_splice_write"
retstr = sprintf("%d", $return)
file = @entry($out)
pathname = fullpath_struct_file(task_current(), @entry($out))
error = $return < 0 ? $return : 0
error_str = error ? errno_str(error) : ""
if (error) {
size = $return
units = "bytes"
}
}
probe generic.fop.read = kernel.function("generic_file_read") ?
{
dev = __file_dev($filp)
devname = __find_bdevname(dev, __file_bdev($filp))
ino = __file_ino($filp)
file = $filp
pathname = fullpath_struct_file(task_current(), $filp)
count = $count
name = "generic_file_read"
argstr = sprintf("%d", $count)
size = $count
units = "bytes"
}
probe generic.fop.read.return = kernel.function("generic_file_read").return ?
{
name = "generic_file_read"
retstr = sprintf("%d", $return)
if ($return > 0) {
size = $return
units = "bytes"
}
}
probe generic.fop.write = kernel.function("generic_file_write") ?
{
dev = __file_dev($file)
devname = __find_bdevname(dev, __file_bdev($file))
ino = __file_ino($file)
file = $file
pathname = fullpath_struct_file(task_current(), $file)
count = $count
name = "generic_file_write"
argstr = sprintf("%d", $count)
size = $count
units = "bytes"
}
probe generic.fop.write.return = kernel.function("generic_file_write").return ?
{
name = "generic_file_write"
retstr = sprintf("%d", $return)
if ($return > 0) {
size = $return
units = "bytes"
}
}
/* generic_writepages calls mpage_writepages(mapping, wbc, NULL) */
probe generic.aop.writepages = kernel.function("mpage_writepages")
{
dev = $mapping->host->i_sb->s_dev
devname = __find_bdevname(dev, $mapping->host->i_sb->s_bdev)
ino = $mapping->host->i_ino
nr_to_write = $wbc->nr_to_write
name = "generic_writepages"
argstr = sprintf("%d", $wbc->nr_to_write)
size = $wbc->nr_to_write
units = "pages"
}
probe generic.aop.writepages.return = kernel.function("mpage_writepages").return
{
name = "generic_writepages"
retstr = sprintf("%d", $return)
}
probe vfs.do_sync_read = kernel.function("do_sync_read") !,
__vfs.__vfs_read
{
dev = __file_dev(@choose_defined($filp, $file))
devname = __find_bdevname(dev,
__file_bdev(@choose_defined($filp, $file)))
ino = __file_ino(@choose_defined($filp, $file))
file = @choose_defined($filp, $file)
pathname = @defined($filp) ? fullpath_struct_file(task_current(), $filp) : fullpath_struct_file(task_current(), $file)
len = @choose_defined($len, $count)
pos = kernel_pointer(@choose_defined($ppos, $pos))
buf = $buf
name = "do_sync_read"
argstr = sprintf("%d, %d, %p", @choose_defined($len, $count),
pos, $buf)
size = @choose_defined($len, $count)
units = "bytes"
bytes_to_read = @choose_defined($len, $count)
}
# We'd really like to probe new_sync_read() here, but it is typically
# inlined. So, we'll probe its caller, __vfs_read().
probe __vfs.__vfs_read = kernel.function("__vfs_read")!, kernel.function("vfs_read")
{
# Skip the call if new_sync_read() wouldn't be called.
if ($file->f_op->read || !$file->f_op->read_iter) next
}
probe vfs.do_sync_read.return = kernel.function("do_sync_read").return !,
__vfs.__vfs_read.return
{
name = "do_sync_read"
retstr = sprintf("%d", $return)
bytes_to_read = @entry(@choose_defined($len, $count))
ret = $return
bytes_read = $return > 0 ? $return : 0
error = $return < 0 ? $return : 0
error_str = error ? errno_str(error) : ""
if ($return > 0) {
size = $return
units = "bytes"
}
}
probe __vfs.__vfs_read.return = kernel.function("__vfs_read").return! , kernel.function("vfs_read").return
{
# Skip the call if new_sync_read() wouldn't be called.
if (@entry($file->f_op->read) || !@entry($file->f_op->read_iter)) next
}
probe vfs.do_sync_write = kernel.function("do_sync_write") !,
__vfs.__vfs_write
{
dev = __file_dev(@choose_defined($filp, $file))
devname = __find_bdevname(dev,
__file_bdev(@choose_defined($filp, $file)))
ino = __file_ino(@choose_defined($filp, $file))
file = @choose_defined($filp, $file)
pathname = @defined($filp) ? fullpath_struct_file(task_current(), $filp) : fullpath_struct_file(task_current(), $file)
len = @choose_defined($len, $count)
pos = kernel_pointer(@choose_defined($ppos, $pos))
buf = @choose_defined($buf, $p)
bytes_to_write = @choose_defined($len, $count)
name = "do_sync_write"
argstr = sprintf("%d, %d , %p", @choose_defined($len, $count),
pos, @choose_defined($buf, $p))
size = @choose_defined($len, $count)
units = "bytes"
}
# We'd really like to probe new_sync_read() here, but it is typically
# inlined. So, we'll probe its caller, __vfs_write().
probe __vfs.__vfs_write = kernel.function("__vfs_write")!, kernel.function("vfs_write")
{
# Skip the call if new_sync_write() wouldn't be called.
if ($file->f_op->write || !$file->f_op->write_iter) next
}
probe vfs.do_sync_write.return = kernel.function("do_sync_write").return !,
__vfs.__vfs_write.return
{
name = "do_sync_write"
retstr = sprintf("%d", $return)
bytes_to_write = @entry(@choose_defined($len, $count))
pos = kernel_pointer(@entry(@choose_defined($ppos, $pos)))
ret = $return
bytes_written = $return > 0 ? $return : 0
error = $return < 0 ? $return : 0
error_str = error ? errno_str(error) : ""
if (error) {
size = $return
units = "bytes"
}
}
probe __vfs.__vfs_write.return = kernel.function("__vfs_write").return!, kernel.function("vfs_write").return
{
# Skip the call if new_sync_write() wouldn't be called.
if (@entry($file->f_op->write) || !@entry($file->f_op->write_iter)) next
}
probe vfs.block_sync_page = kernel.function("block_sync_page") ?
{
dev = __page_dev($page)
devname = __find_bdevname(dev, __page_bdev($page))
ino = __page_ino($page)
%(systemtap_v < "2.3" %?
# 'page_index' is deprecated
page_index = __page_index($page)
%)
index = __page_index($page)
name = "block_sync_page"
argstr = sprintf("%d", index)
size = 1
units = "pages"
}
probe vfs.block_sync_page.return = kernel.function("block_sync_page").return ?
{
name = "block_sync_page"
retstr = sprintf("N/A")
}
probe vfs.buffer_migrate_page = kernel.function("buffer_migrate_page") ?
{
dev = __page_dev($page)
ino = __page_ino($page)
devname = __find_bdevname(dev,__page_bdev($page))
%(systemtap_v < "2.3" %?
# 'page_index' is deprecated
page_index = __page_index($page)
%)
index = __page_index($page)
name = "buffer_migrate_page"
argstr = sprintf("%d", index)
size = 1
units = "pages"
}
probe vfs.buffer_migrate_page.return =
kernel.function("buffer_migrate_page").return ?
{
name = "buffer_migrate_page"
retstr = sprintf("%d", $return)
if ($return == 0) {
size = 1
units = "pages"
}
}
/* default if aop not set, __set_page_dirty_nobuffers usually used if set */
probe vfs.__set_page_dirty_buffers = kernel.function("__set_page_dirty_buffers")
{
dev = __page_dev($page)
devname = __find_bdevname(dev, __page_bdev($page))
ino = __page_ino($page)
index = __page_index($page)
name = "__set_page_dirty_buffers"
argstr = sprintf("%d", index)
size = 1
units = "pages"
}
probe vfs.__set_page_dirty_buffers.return =
kernel.function("__set_page_dirty_buffers").return
{
name = "__set_page_dirty_buffers"
retstr = sprintf("%d", $return)
%( kernel_v >= "2.6.17" %?
if ($return == 1)
%:
if ($return == 0)
%)
{
size = 1
units = "pages"
}
}
probe vfs.do_mpage_readpage = __vfs.do_mpage_readpage,
__vfs.ext4_mpage_readpages ?
{
name = "do_mpage_readpage"
argstr = sprintf("%d", index)
units = "pages"
}
probe __vfs.do_mpage_readpage = kernel.function("do_mpage_readpage")
{
dev = __page_dev($page)
devname = __find_bdevname(dev, __page_bdev($page))
ino = __page_ino($page)
index = __page_index($page)
size = 1
}
probe __vfs.ext4_mpage_readpages = kernel.function("ext4_mpage_readpages") ?
{
size = $nr_pages
if ($nr_pages == 1 && $page != 0) {
dev = __page_dev($page)
devname = __find_bdevname(dev, __page_bdev($page))
ino = __page_ino($page)
index = __page_index($page)
}
else {
# Note that we're going to return information about
# the first page from the list of pages. It is the best
# we can do here.
__page = __get_first_page($pages)
dev = __page_dev(__page)
devname = __find_bdevname(dev, __page_bdev(__page))
ino = __page_ino(__page)
index = __page_index(__page)
}
}
probe vfs.do_mpage_readpage.return = __vfs.do_mpage_readpage.return,
__vfs.ext4_mpage_readpages.return ?
{
name = "do_mpage_readpage"
retstr = sprintf("0x%x", $return)
units = "pages"
}
probe __vfs.do_mpage_readpage.return =
kernel.function("do_mpage_readpage").return
{
size = 1
}
probe __vfs.ext4_mpage_readpages.return =
kernel.function("ext4_mpage_readpages").return ?
{
if (@defined($rac)) {
size = @entry($rac) ? @entry($rac->_nr_pages) : 1
} else {
size = @entry($nr_pages)
}
}
/* newer style */
probe vfs.__add_to_page_cache =
kernel.function("add_to_page_cache_locked"),
kernel.function("add_to_page_cache_lru")
{ }
probe vfs.add_to_page_cache =
vfs.__add_to_page_cache !,
kernel.function("add_to_page_cache") /* older style */
{
dev = $mapping->host->i_sb->s_dev
devname = __find_bdevname(dev, $mapping->host->i_sb->s_bdev)
ino = $mapping->host->i_ino
index = $offset
nrpages = $mapping->nrpages
size = $mapping->nrpages
units = "pages"
name = "vfs.add_to_page_cache"
argstr = sprintf("%d, %d", ino, $offset)
}
/* newer style */
probe vfs.__add_to_page_cache.return =
kernel.function("add_to_page_cache_locked").return,
kernel.function("add_to_page_cache_lru").return
{ }
probe vfs.add_to_page_cache.return =
vfs.__add_to_page_cache.return !,
kernel.function("add_to_page_cache").return /* older style */
{
name = "vfs.add_to_page_cache"
retstr = sprintf("%d", $return)
if ($return == 0) {
size = 1
units = "pages"
}
}
probe vfs.remove_from_page_cache =
kernel.function("__delete_from_page_cache") !,
kernel.function("__remove_from_page_cache")
{
dev = __page_dev($page)
devname = __find_bdevname(dev, __page_bdev($page))
ino = __page_ino($page)
index = __page_index($page)
name = "vfs.remove_from_page_cache"
argstr = sprintf("%d", ino)
}
probe vfs.remove_from_page_cache.return =
kernel.function("__delete_from_page_cache").return !,
kernel.function("__remove_from_page_cache").return
{
name = "vfs.remove_from_page_cache"
retstr = sprintf("N/A")
}
probe vfs.read = kernel.function("vfs_read")
{
file = $file
pathname = fullpath_struct_file(task_current(), $file)
pos = $pos
buf = $buf
bytes_to_read = $count
dev = __file_dev($file)
devname = __find_bdevname(dev, __file_bdev($file))
ino = __file_ino($file)
name = "vfs.read"
argstr = sprintf("%d, %d, %p", $count, $pos, $buf)
}
probe vfs.read.return = kernel.function("vfs_read").return
{
name = "vfs.read"
retstr = sprintf("%d", $return)
file = @entry($file)
pathname = fullpath_struct_file(task_current(), @entry($file))
pos = @entry($pos)
buf = @entry($buf)
bytes_to_read = @entry($count)
dev = __file_dev(@entry($file))
devname = __find_bdevname(dev, __file_bdev(@entry($file)))
ino = __file_ino(@entry($file))
ret = $return
bytes_read = $return > 0 ? $return : 0
error = $return < 0 ? $return : 0
error_str = error ? errno_str(error) : ""
}
probe vfs.readv = kernel.function("vfs_readv")
{
file = $file
pathname = fullpath_struct_file(task_current(), $file)
dev = __file_dev($file)
devname = __find_bdevname(dev, __file_bdev($file))
ino = __file_ino($file)
pos = $pos
vec = $vec
vlen = $vlen
bytes_to_read = _get_fopv_size($vec, $vlen)
name = "vfs.readv"
argstr = sprintf("%d, %d, %p", bytes_to_read, $pos, $vec)
}
probe vfs.readv.return = kernel.function("vfs_readv").return
{
name = "vfs.readv"
retstr = sprintf("%d", $return)
file = @entry($file)
pathname = fullpath_struct_file(task_current(), @entry($file))
dev = __file_dev(@entry($file))
devname = __find_bdevname(dev, __file_bdev(@entry($file)))
ino = __file_ino(@entry($file))
pos = @entry($pos)
vec = @entry($vec)
vlen = @entry($vlen)
bytes_to_read = _get_fopv_size(vec, vlen)
ret = $return
bytes_read = $return > 0 ? $return : 0
error = $return < 0 ? $return : 0
error_str = error ? errno_str(error) : ""
}
probe vfs.write = kernel.function("vfs_write")
{
file = $file
pathname = fullpath_struct_file(task_current(), $file)
pos = $pos
buf = $buf
bytes_to_write = $count
dev = __file_dev($file)
devname = __find_bdevname(dev, __file_bdev($file))
ino = __file_ino($file)
name = "vfs.write"
argstr = sprintf("%d, %d, %p", $count, $pos, $buf)
}
probe vfs.write.return = kernel.function("vfs_write").return
{
name = "vfs.write"
retstr = sprintf("%d", $return)
file = @entry($file)
pathname = fullpath_struct_file(task_current(), @entry($file))
pos = @entry($pos)
buf = @entry($buf)
bytes_to_write = @entry($count)
dev = __file_dev(@entry($file))
devname = __find_bdevname(dev, __file_bdev(@entry($file)))
ino = __file_ino(@entry($file))
ret = $return
bytes_written = $return > 0 ? $return : 0
error = $return < 0 ? $return : 0
error_str = error ? errno_str(error) : ""
}
probe vfs.writev = kernel.function("vfs_writev")
{
file = $file
pathname = fullpath_struct_file(task_current(), $file)
dev = __file_dev($file)
devname = __find_bdevname(dev, __file_bdev($file))
ino = __file_ino($file)
pos = $pos
vlen = $vlen
vec = $vec
bytes_to_write = _get_fopv_size($vec, $vlen)
name = "vfs.writev"
argstr = sprintf("%d, %d, %p", bytes_to_write, $pos, $vec)
}
probe vfs.writev.return = kernel.function("vfs_writev").return
{
name = "vfs.writev"
retstr = sprintf("%d", $return)
file = @entry($file)
pathname = fullpath_struct_file(task_current(), @entry($file))
dev = __file_dev(@entry($file))
devname = __find_bdevname(dev, __file_bdev(@entry($file)))
ino = __file_ino(@entry($file))
pos = @entry($pos)
vlen = @entry($vlen)
vec = @entry($vec)
bytes_to_write = _get_fopv_size(vec, vlen)
ret = $return
bytes_written = $return > 0 ? $return : 0
error = $return < 0 ? $return : 0
error_str = error ? errno_str(error) : ""
}
probe _vfs.generic_file_readonly_mmap =
kernel.function("generic_file_readonly_mmap")
{
file = $file
pathname = fullpath_struct_file(task_current(), $file)
vma = $vma
name = "_vfs.generic_file_readonly_mmap"
argstr = sprintf("%p, %p", $file, $vma)
}
probe _vfs.generic_file_readonly_mmap.return =
kernel.function("generic_file_readonly_mmap").return
{
name = "_vfs.generic_file_readonly_mmap"
retstr = sprintf("%d", $return)
file = @entry($file)
pathname = fullpath_struct_file(task_current(), @entry($file))
vma = @entry($vma)
ret = $return
error = $return < 0 ? $return : 0
error_str = error ? errno_str(error) : ""
}
probe _vfs.generic_block_bmap = kernel.function("generic_block_bmap")
{
mapping = $mapping
block = $block
get_block = $get_block
name = "_vfs.generic_block_bmap"
argstr = sprintf("%p, %p, %p", $mapping, $block, $get_block)
}
probe _vfs.generic_commit_write = kernel.function("generic_commit_write") ?
{
file = $file
pathname = fullpath_struct_file(task_current(), $file)
page = $page
from = $from
to = $to
name = "_vfs.generic_commit_write"
argstr = sprintf("%p, %p, %d, %d", $file, $page, $from, $to)
}
probe _vfs.block_prepare_write = kernel.function("__block_write_begin_int") !,
kernel.function("__block_write_begin") !,
kernel.function("__block_prepare_write")
{
page = $page
if (@defined($pos)) {
_inode = __page_ino($page)
from = $pos & (@const("_STP_PAGE_SIZE") - 1)
to = from + $len
%(systemtap_v < "2.3" %?
# write_from and write_upto are deprecated
write_from = from
write_upto = to
%)
}
else {
_inode = $inode
%(systemtap_v < "2.3" %?
# write_from and write_upto are deprecated
write_from = $from
write_upto = $to
%)
from = $from
to = $to
}
name = "_vfs.generic_commit_write"
argstr = sprintf("%p, %d, %d", $page, from, to)
}
probe _vfs.block_prepare_write.return =
kernel.function("__block_write_begin_int").return !,
kernel.function("__block_write_begin").return !,
kernel.function("__block_prepare_write").return
{
name = "_vfs.block_prepare_write"
retstr = sprintf("%d", $return)
page = @entry($page)
if (@defined(@entry($pos))) {
_inode = __page_ino(@entry($page))
from = @entry($pos) & (@const("_STP_PAGE_SIZE") - 1)
to = from + @entry($len)
%(systemtap_v < "2.3" %?
# write_from and write_upto are deprecated
write_from = from
write_upto = to
%)
}
else {
_inode = @entry($inode)
%(systemtap_v < "2.3" %?
# write_from and write_upto are deprecated
write_from = @entry($from)
write_upto = @entry($to)
%)
from = @entry($from)
to = @entry($to)
}
page = @entry($page)
ret = $return
error = ret < 0 ? ret : 0
error_str = error ? errno_str(error) : ""
}
probe _vfs.block_write_begin = kernel.function("block_write_begin") ?
{
file = @choose_defined($file, 0)
pathname = @defined($file) ? fullpath_struct_file(task_current(), $file) : ""
pos = $pos
len = $len
flags = $flags
_inode = __address_inode($mapping)
name = "_vfs.block_write_begin"
argstr = sprintf("%p, %d, %d, %x", file, $pos, $len, $flags)
}
probe _vfs.block_write_begin.return =
kernel.function("block_write_begin").return ?
{
name = "_vfs.block_write_begin"
retstr = sprintf("%d", $return)
file = @choose_defined(@entry($file), "")
pathname = @defined(@entry($file)) ? fullpath_struct_file(task_current(), @entry($file)) : ""
pos = @entry($pos)
len = @entry($len)
flags = @entry($flags)
_inode = __address_inode(@entry($mapping))
ret = $return
error = $return < 0 ? $return : 0
error_str = error ? errno_str(error) : ""
}
probe _vfs.block_write_end = kernel.function("block_write_end") ?
{
file = $file
pathname = fullpath_struct_file(task_current(), $file)
pos = $pos
len = $len
page = $page
_inode = __address_inode($mapping)
name = "_vfs.block_write_end"
argstr = sprintf("%p, %d, %d, %p", $file, $pos, $len, $page)
}
probe _vfs.block_write_end.return = kernel.function("block_write_end").return ?
{
name = "_vfs.block_write_end"
retstr = sprintf("%d", $return)
file = @entry($file)
pathname = fullpath_struct_file(task_current(), @entry($file))
pos = @entry($pos)
len = @entry($len)
page = @entry($page)
_inode = __address_inode(@entry($mapping))
ret = $return
}
probe vfs.open = kernel.function("vfs_open") ?
{
name = "vfs.open"
path = $path
cred = @defined($cred) ? $cred : $file->f_cred
pathname = fullpath_struct_path($path)
argstr = sprintf("%s, %p", pathname, cred)
}
probe vfs.open.return = kernel.function("vfs_open").return ?
{
name = "vfs.open"
retstr = sprintf("%d", $return)
ret = $return
error = $return < 0 ? $return : 0
error_str = error ? errno_str(error) : ""
path = @entry($path)
cred = @entry(@defined($cred) ? $cred : $file->f_cred)
pathname = fullpath_struct_path(@entry($path))
}