aboutsummaryrefslogtreecommitdiffstats
path: root/Documentation/ABI
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/ABI')
-rw-r--r--Documentation/ABI/testing/debugfs-kmemtrace71
-rw-r--r--Documentation/ABI/testing/ima_policy61
-rw-r--r--Documentation/ABI/testing/sysfs-bus-pci113
-rw-r--r--Documentation/ABI/testing/sysfs-class-regulator57
-rw-r--r--Documentation/ABI/testing/sysfs-firmware-memmap2
-rw-r--r--Documentation/ABI/testing/sysfs-fs-ext481
6 files changed, 375 insertions, 10 deletions
diff --git a/Documentation/ABI/testing/debugfs-kmemtrace b/Documentation/ABI/testing/debugfs-kmemtrace
new file mode 100644
index 000000000000..5e6a92a02d85
--- /dev/null
+++ b/Documentation/ABI/testing/debugfs-kmemtrace
@@ -0,0 +1,71 @@
1What: /sys/kernel/debug/kmemtrace/
2Date: July 2008
3Contact: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
4Description:
5
6In kmemtrace-enabled kernels, the following files are created:
7
8/sys/kernel/debug/kmemtrace/
9 cpu<n> (0400) Per-CPU tracing data, see below. (binary)
10 total_overruns (0400) Total number of bytes which were dropped from
11 cpu<n> files because of full buffer condition,
12 non-binary. (text)
13 abi_version (0400) Kernel's kmemtrace ABI version. (text)
14
15Each per-CPU file should be read according to the relay interface. That is,
16the reader should set affinity to that specific CPU and, as currently done by
17the userspace application (though there are other methods), use poll() with
18an infinite timeout before every read(). Otherwise, erroneous data may be
19read. The binary data has the following _core_ format:
20
21 Event ID (1 byte) Unsigned integer, one of:
22 0 - represents an allocation (KMEMTRACE_EVENT_ALLOC)
23 1 - represents a freeing of previously allocated memory
24 (KMEMTRACE_EVENT_FREE)
25 Type ID (1 byte) Unsigned integer, one of:
26 0 - this is a kmalloc() / kfree()
27 1 - this is a kmem_cache_alloc() / kmem_cache_free()
28 2 - this is a __get_free_pages() et al.
29 Event size (2 bytes) Unsigned integer representing the
30 size of this event. Used to extend
31 kmemtrace. Discard the bytes you
32 don't know about.
33 Sequence number (4 bytes) Signed integer used to reorder data
34 logged on SMP machines. Wraparound
35 must be taken into account, although
36 it is unlikely.
37 Caller address (8 bytes) Return address to the caller.
38 Pointer to mem (8 bytes) Pointer to target memory area. Can be
39 NULL, but not all such calls might be
40 recorded.
41
42In case of KMEMTRACE_EVENT_ALLOC events, the next fields follow:
43
44 Requested bytes (8 bytes) Total number of requested bytes,
45 unsigned, must not be zero.
46 Allocated bytes (8 bytes) Total number of actually allocated
47 bytes, unsigned, must not be lower
48 than requested bytes.
49 Requested flags (4 bytes) GFP flags supplied by the caller.
50 Target CPU (4 bytes) Signed integer, valid for event id 1.
51 If equal to -1, target CPU is the same
52 as origin CPU, but the reverse might
53 not be true.
54
55The data is made available in the same endianness the machine has.
56
57Other event ids and type ids may be defined and added. Other fields may be
58added by increasing event size, but see below for details.
59Every modification to the ABI, including new id definitions, are followed
60by bumping the ABI version by one.
61
62Adding new data to the packet (features) is done at the end of the mandatory
63data:
64 Feature size (2 byte)
65 Feature ID (1 byte)
66 Feature data (Feature size - 3 bytes)
67
68
69Users:
70 kmemtrace-user - git://repo.or.cz/kmemtrace-user.git
71
diff --git a/Documentation/ABI/testing/ima_policy b/Documentation/ABI/testing/ima_policy
new file mode 100644
index 000000000000..6434f0df012e
--- /dev/null
+++ b/Documentation/ABI/testing/ima_policy
@@ -0,0 +1,61 @@
1What: security/ima/policy
2Date: May 2008
3Contact: Mimi Zohar <zohar@us.ibm.com>
4Description:
5 The Trusted Computing Group(TCG) runtime Integrity
6 Measurement Architecture(IMA) maintains a list of hash
7 values of executables and other sensitive system files
8 loaded into the run-time of this system. At runtime,
9 the policy can be constrained based on LSM specific data.
10 Policies are loaded into the securityfs file ima/policy
11 by opening the file, writing the rules one at a time and
12 then closing the file. The new policy takes effect after
13 the file ima/policy is closed.
14
15 rule format: action [condition ...]
16
17 action: measure | dont_measure
18 condition:= base | lsm
19 base: [[func=] [mask=] [fsmagic=] [uid=]]
20 lsm: [[subj_user=] [subj_role=] [subj_type=]
21 [obj_user=] [obj_role=] [obj_type=]]
22
23 base: func:= [BPRM_CHECK][FILE_MMAP][INODE_PERMISSION]
24 mask:= [MAY_READ] [MAY_WRITE] [MAY_APPEND] [MAY_EXEC]
25 fsmagic:= hex value
26 uid:= decimal value
27 lsm: are LSM specific
28
29 default policy:
30 # PROC_SUPER_MAGIC
31 dont_measure fsmagic=0x9fa0
32 # SYSFS_MAGIC
33 dont_measure fsmagic=0x62656572
34 # DEBUGFS_MAGIC
35 dont_measure fsmagic=0x64626720
36 # TMPFS_MAGIC
37 dont_measure fsmagic=0x01021994
38 # SECURITYFS_MAGIC
39 dont_measure fsmagic=0x73636673
40
41 measure func=BPRM_CHECK
42 measure func=FILE_MMAP mask=MAY_EXEC
43 measure func=INODE_PERM mask=MAY_READ uid=0
44
45 The default policy measures all executables in bprm_check,
46 all files mmapped executable in file_mmap, and all files
47 open for read by root in inode_permission.
48
49 Examples of LSM specific definitions:
50
51 SELinux:
52 # SELINUX_MAGIC
53 dont_measure fsmagic=0xF97CFF8C
54
55 dont_measure obj_type=var_log_t
56 dont_measure obj_type=auditd_log_t
57 measure subj_user=system_u func=INODE_PERM mask=MAY_READ
58 measure subj_role=system_r func=INODE_PERM mask=MAY_READ
59
60 Smack:
61 measure subj_user=_ func=INODE_PERM mask=MAY_READ
diff --git a/Documentation/ABI/testing/sysfs-bus-pci b/Documentation/ABI/testing/sysfs-bus-pci
index ceddcff4082a..97ad190e13af 100644
--- a/Documentation/ABI/testing/sysfs-bus-pci
+++ b/Documentation/ABI/testing/sysfs-bus-pci
@@ -1,3 +1,89 @@
1What: /sys/bus/pci/drivers/.../bind
2Date: December 2003
3Contact: linux-pci@vger.kernel.org
4Description:
5 Writing a device location to this file will cause
6 the driver to attempt to bind to the device found at
7 this location. This is useful for overriding default
8 bindings. The format for the location is: DDDD:BB:DD.F.
9 That is Domain:Bus:Device.Function and is the same as
10 found in /sys/bus/pci/devices/. For example:
11 # echo 0000:00:19.0 > /sys/bus/pci/drivers/foo/bind
12 (Note: kernels before 2.6.28 may require echo -n).
13
14What: /sys/bus/pci/drivers/.../unbind
15Date: December 2003
16Contact: linux-pci@vger.kernel.org
17Description:
18 Writing a device location to this file will cause the
19 driver to attempt to unbind from the device found at
20 this location. This may be useful when overriding default
21 bindings. The format for the location is: DDDD:BB:DD.F.
22 That is Domain:Bus:Device.Function and is the same as
23 found in /sys/bus/pci/devices/. For example:
24 # echo 0000:00:19.0 > /sys/bus/pci/drivers/foo/unbind
25 (Note: kernels before 2.6.28 may require echo -n).
26
27What: /sys/bus/pci/drivers/.../new_id
28Date: December 2003
29Contact: linux-pci@vger.kernel.org
30Description:
31 Writing a device ID to this file will attempt to
32 dynamically add a new device ID to a PCI device driver.
33 This may allow the driver to support more hardware than
34 was included in the driver's static device ID support
35 table at compile time. The format for the device ID is:
36 VVVV DDDD SVVV SDDD CCCC MMMM PPPP. That is Vendor ID,
37 Device ID, Subsystem Vendor ID, Subsystem Device ID,
38 Class, Class Mask, and Private Driver Data. The Vendor ID
39 and Device ID fields are required, the rest are optional.
40 Upon successfully adding an ID, the driver will probe
41 for the device and attempt to bind to it. For example:
42 # echo "8086 10f5" > /sys/bus/pci/drivers/foo/new_id
43
44What: /sys/bus/pci/drivers/.../remove_id
45Date: February 2009
46Contact: Chris Wright <chrisw@sous-sol.org>
47Description:
48 Writing a device ID to this file will remove an ID
49 that was dynamically added via the new_id sysfs entry.
50 The format for the device ID is:
51 VVVV DDDD SVVV SDDD CCCC MMMM. That is Vendor ID, Device
52 ID, Subsystem Vendor ID, Subsystem Device ID, Class,
53 and Class Mask. The Vendor ID and Device ID fields are
54 required, the rest are optional. After successfully
55 removing an ID, the driver will no longer support the
56 device. This is useful to ensure auto probing won't
57 match the driver to the device. For example:
58 # echo "8086 10f5" > /sys/bus/pci/drivers/foo/remove_id
59
60What: /sys/bus/pci/rescan
61Date: January 2009
62Contact: Linux PCI developers <linux-pci@vger.kernel.org>
63Description:
64 Writing a non-zero value to this attribute will
65 force a rescan of all PCI buses in the system, and
66 re-discover previously removed devices.
67 Depends on CONFIG_HOTPLUG.
68
69What: /sys/bus/pci/devices/.../remove
70Date: January 2009
71Contact: Linux PCI developers <linux-pci@vger.kernel.org>
72Description:
73 Writing a non-zero value to this attribute will
74 hot-remove the PCI device and any of its children.
75 Depends on CONFIG_HOTPLUG.
76
77What: /sys/bus/pci/devices/.../rescan
78Date: January 2009
79Contact: Linux PCI developers <linux-pci@vger.kernel.org>
80Description:
81 Writing a non-zero value to this attribute will
82 force a rescan of the device's parent bus and all
83 child buses, and re-discover devices removed earlier
84 from this part of the device tree.
85 Depends on CONFIG_HOTPLUG.
86
1What: /sys/bus/pci/devices/.../vpd 87What: /sys/bus/pci/devices/.../vpd
2Date: February 2008 88Date: February 2008
3Contact: Ben Hutchings <bhutchings@solarflare.com> 89Contact: Ben Hutchings <bhutchings@solarflare.com>
@@ -9,3 +95,30 @@ Description:
9 that some devices may have malformatted data. If the 95 that some devices may have malformatted data. If the
10 underlying VPD has a writable section then the 96 underlying VPD has a writable section then the
11 corresponding section of this file will be writable. 97 corresponding section of this file will be writable.
98
99What: /sys/bus/pci/devices/.../virtfnN
100Date: March 2009
101Contact: Yu Zhao <yu.zhao@intel.com>
102Description:
103 This symbolic link appears when hardware supports the SR-IOV
104 capability and the Physical Function driver has enabled it.
105 The symbolic link points to the PCI device sysfs entry of the
106 Virtual Function whose index is N (0...MaxVFs-1).
107
108What: /sys/bus/pci/devices/.../dep_link
109Date: March 2009
110Contact: Yu Zhao <yu.zhao@intel.com>
111Description:
112 This symbolic link appears when hardware supports the SR-IOV
113 capability and the Physical Function driver has enabled it,
114 and this device has vendor specific dependencies with others.
115 The symbolic link points to the PCI device sysfs entry of
116 Physical Function this device depends on.
117
118What: /sys/bus/pci/devices/.../physfn
119Date: March 2009
120Contact: Yu Zhao <yu.zhao@intel.com>
121Description:
122 This symbolic link appears when a device is a Virtual Function.
123 The symbolic link points to the PCI device sysfs entry of the
124 Physical Function this device associates with.
diff --git a/Documentation/ABI/testing/sysfs-class-regulator b/Documentation/ABI/testing/sysfs-class-regulator
index 873ef1fc1569..e091fa873792 100644
--- a/Documentation/ABI/testing/sysfs-class-regulator
+++ b/Documentation/ABI/testing/sysfs-class-regulator
@@ -4,8 +4,8 @@ KernelVersion: 2.6.26
4Contact: Liam Girdwood <lrg@slimlogic.co.uk> 4Contact: Liam Girdwood <lrg@slimlogic.co.uk>
5Description: 5Description:
6 Some regulator directories will contain a field called 6 Some regulator directories will contain a field called
7 state. This reports the regulator enable status, for 7 state. This reports the regulator enable control, for
8 regulators which can report that value. 8 regulators which can report that input value.
9 9
10 This will be one of the following strings: 10 This will be one of the following strings:
11 11
@@ -14,16 +14,54 @@ Description:
14 'unknown' 14 'unknown'
15 15
16 'enabled' means the regulator output is ON and is supplying 16 'enabled' means the regulator output is ON and is supplying
17 power to the system. 17 power to the system (assuming no error prevents it).
18 18
19 'disabled' means the regulator output is OFF and is not 19 'disabled' means the regulator output is OFF and is not
20 supplying power to the system.. 20 supplying power to the system (unless some non-Linux
21 control has enabled it).
21 22
22 'unknown' means software cannot determine the state, or 23 'unknown' means software cannot determine the state, or
23 the reported state is invalid. 24 the reported state is invalid.
24 25
25 NOTE: this field can be used in conjunction with microvolts 26 NOTE: this field can be used in conjunction with microvolts
26 and microamps to determine regulator output levels. 27 or microamps to determine configured regulator output levels.
28
29
30What: /sys/class/regulator/.../status
31Description:
32 Some regulator directories will contain a field called
33 "status". This reports the current regulator status, for
34 regulators which can report that output value.
35
36 This will be one of the following strings:
37
38 off
39 on
40 error
41 fast
42 normal
43 idle
44 standby
45
46 "off" means the regulator is not supplying power to the
47 system.
48
49 "on" means the regulator is supplying power to the system,
50 and the regulator can't report a detailed operation mode.
51
52 "error" indicates an out-of-regulation status such as being
53 disabled due to thermal shutdown, or voltage being unstable
54 because of problems with the input power supply.
55
56 "fast", "normal", "idle", and "standby" are all detailed
57 regulator operation modes (described elsewhere). They
58 imply "on", but provide more detail.
59
60 Note that regulator status is a function of many inputs,
61 not limited to control inputs from Linux. For example,
62 the actual load presented may trigger "error" status; or
63 a regulator may be enabled by another user, even though
64 Linux did not enable it.
27 65
28 66
29What: /sys/class/regulator/.../type 67What: /sys/class/regulator/.../type
@@ -58,7 +96,7 @@ Description:
58 Some regulator directories will contain a field called 96 Some regulator directories will contain a field called
59 microvolts. This holds the regulator output voltage setting 97 microvolts. This holds the regulator output voltage setting
60 measured in microvolts (i.e. E-6 Volts), for regulators 98 measured in microvolts (i.e. E-6 Volts), for regulators
61 which can report that voltage. 99 which can report the control input for voltage.
62 100
63 NOTE: This value should not be used to determine the regulator 101 NOTE: This value should not be used to determine the regulator
64 output voltage level as this value is the same regardless of 102 output voltage level as this value is the same regardless of
@@ -73,7 +111,7 @@ Description:
73 Some regulator directories will contain a field called 111 Some regulator directories will contain a field called
74 microamps. This holds the regulator output current limit 112 microamps. This holds the regulator output current limit
75 setting measured in microamps (i.e. E-6 Amps), for regulators 113 setting measured in microamps (i.e. E-6 Amps), for regulators
76 which can report that current. 114 which can report the control input for a current limit.
77 115
78 NOTE: This value should not be used to determine the regulator 116 NOTE: This value should not be used to determine the regulator
79 output current level as this value is the same regardless of 117 output current level as this value is the same regardless of
@@ -87,7 +125,7 @@ Contact: Liam Girdwood <lrg@slimlogic.co.uk>
87Description: 125Description:
88 Some regulator directories will contain a field called 126 Some regulator directories will contain a field called
89 opmode. This holds the current regulator operating mode, 127 opmode. This holds the current regulator operating mode,
90 for regulators which can report it. 128 for regulators which can report that control input value.
91 129
92 The opmode value can be one of the following strings: 130 The opmode value can be one of the following strings:
93 131
@@ -101,7 +139,8 @@ Description:
101 139
102 NOTE: This value should not be used to determine the regulator 140 NOTE: This value should not be used to determine the regulator
103 output operating mode as this value is the same regardless of 141 output operating mode as this value is the same regardless of
104 whether the regulator is enabled or disabled. 142 whether the regulator is enabled or disabled. A "status"
143 attribute may be available to determine the actual mode.
105 144
106 145
107What: /sys/class/regulator/.../min_microvolts 146What: /sys/class/regulator/.../min_microvolts
diff --git a/Documentation/ABI/testing/sysfs-firmware-memmap b/Documentation/ABI/testing/sysfs-firmware-memmap
index 0d99ee6ae02e..eca0d65087dc 100644
--- a/Documentation/ABI/testing/sysfs-firmware-memmap
+++ b/Documentation/ABI/testing/sysfs-firmware-memmap
@@ -1,6 +1,6 @@
1What: /sys/firmware/memmap/ 1What: /sys/firmware/memmap/
2Date: June 2008 2Date: June 2008
3Contact: Bernhard Walle <bwalle@suse.de> 3Contact: Bernhard Walle <bernhard.walle@gmx.de>
4Description: 4Description:
5 On all platforms, the firmware provides a memory map which the 5 On all platforms, the firmware provides a memory map which the
6 kernel reads. The resources from that memory map are registered 6 kernel reads. The resources from that memory map are registered
diff --git a/Documentation/ABI/testing/sysfs-fs-ext4 b/Documentation/ABI/testing/sysfs-fs-ext4
new file mode 100644
index 000000000000..4e79074de282
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-fs-ext4
@@ -0,0 +1,81 @@
1What: /sys/fs/ext4/<disk>/mb_stats
2Date: March 2008
3Contact: "Theodore Ts'o" <tytso@mit.edu>
4Description:
5 Controls whether the multiblock allocator should
6 collect statistics, which are shown during the unmount.
7 1 means to collect statistics, 0 means not to collect
8 statistics
9
10What: /sys/fs/ext4/<disk>/mb_group_prealloc
11Date: March 2008
12Contact: "Theodore Ts'o" <tytso@mit.edu>
13Description:
14 The multiblock allocator will round up allocation
15 requests to a multiple of this tuning parameter if the
16 stripe size is not set in the ext4 superblock
17
18What: /sys/fs/ext4/<disk>/mb_max_to_scan
19Date: March 2008
20Contact: "Theodore Ts'o" <tytso@mit.edu>
21Description:
22 The maximum number of extents the multiblock allocator
23 will search to find the best extent
24
25What: /sys/fs/ext4/<disk>/mb_min_to_scan
26Date: March 2008
27Contact: "Theodore Ts'o" <tytso@mit.edu>
28Description:
29 The minimum number of extents the multiblock allocator
30 will search to find the best extent
31
32What: /sys/fs/ext4/<disk>/mb_order2_req
33Date: March 2008
34Contact: "Theodore Ts'o" <tytso@mit.edu>
35Description:
36 Tuning parameter which controls the minimum size for
37 requests (as a power of 2) where the buddy cache is
38 used
39
40What: /sys/fs/ext4/<disk>/mb_stream_req
41Date: March 2008
42Contact: "Theodore Ts'o" <tytso@mit.edu>
43Description:
44 Files which have fewer blocks than this tunable
45 parameter will have their blocks allocated out of a
46 block group specific preallocation pool, so that small
47 files are packed closely together. Each large file
48 will have its blocks allocated out of its own unique
49 preallocation pool.
50
51What: /sys/fs/ext4/<disk>/inode_readahead
52Date: March 2008
53Contact: "Theodore Ts'o" <tytso@mit.edu>
54Description:
55 Tuning parameter which controls the maximum number of
56 inode table blocks that ext4's inode table readahead
57 algorithm will pre-read into the buffer cache
58
59What: /sys/fs/ext4/<disk>/delayed_allocation_blocks
60Date: March 2008
61Contact: "Theodore Ts'o" <tytso@mit.edu>
62Description:
63 This file is read-only and shows the number of blocks
64 that are dirty in the page cache, but which do not
65 have their location in the filesystem allocated yet.
66
67What: /sys/fs/ext4/<disk>/lifetime_write_kbytes
68Date: March 2008
69Contact: "Theodore Ts'o" <tytso@mit.edu>
70Description:
71 This file is read-only and shows the number of kilobytes
72 of data that have been written to this filesystem since it was
73 created.
74
75What: /sys/fs/ext4/<disk>/session_write_kbytes
76Date: March 2008
77Contact: "Theodore Ts'o" <tytso@mit.edu>
78Description:
79 This file is read-only and shows the number of
80 kilobytes of data that have been written to this
81 filesystem since it was mounted.
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-04 05:25:58 -0400