---

yaml --- r: 312355 b: refs/heads/master c: f8bbfd7 h: refs/heads/master i: 312353: a19a78f 312351: b602c90 v: v3
git-mirror · Jun 22, 2012 · 608163e · 608163e
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diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 35c2f48c66d9c1b8d794c3936c3be22aa7c89adb
+refs/heads/master: f8bbfd7d28303967ca4e8597de9bdc9bf8b197e7
diff --git a/trunk/.mailmap b/trunk/.mailmap
@@ -111,7 +111,6 @@ Uwe Kleine-König <ukleinek@informatik.uni-freiburg.de>
 Uwe Kleine-König <ukl@pengutronix.de>
 Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
 Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
-Viresh Kumar <viresh.linux@gmail.com> <viresh.kumar@st.com>
 Takashi YOSHII <takashi.yoshii.zj@renesas.com>
 Yusuke Goda <goda.yusuke@renesas.com>
 Gustavo Padovan <gustavo@las.ic.unicamp.br>

diff --git a/trunk/Documentation/ABI/testing/sysfs-block-rssd b/trunk/Documentation/ABI/testing/sysfs-block-rssd
@@ -1,5 +1,26 @@
+What:           /sys/block/rssd*/registers
+Date:           March 2012
+KernelVersion:  3.3
+Contact:        Asai Thambi S P <asamymuthupa@micron.com>
+Description:    This is a read-only file. Dumps below driver information and
+                hardware registers.
+                    - S ACTive
+                    - Command Issue
+                    - Completed
+                    - PORT IRQ STAT
+                    - HOST IRQ STAT
+                    - Allocated
+                    - Commands in Q
+
 What:           /sys/block/rssd*/status
 Date:           April 2012
 KernelVersion:  3.4
 Contact:        Asai Thambi S P <asamymuthupa@micron.com>
 Description:    This is a read-only file. Indicates the status of the device.
+
+What:           /sys/block/rssd*/flags
+Date:           May 2012
+KernelVersion:  3.5
+Contact:        Asai Thambi S P <asamymuthupa@micron.com>
+Description:    This is a read-only file. Dumps the flags in port and driver
+                data structure
diff --git a/trunk/Documentation/ABI/testing/sysfs-bus-iio b/trunk/Documentation/ABI/testing/sysfs-bus-iio
@@ -219,7 +219,6 @@ What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY_scale
 What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_scale
 What:		/sys/bus/iio/devices/iio:deviceX/in_voltage_scale
 What:		/sys/bus/iio/devices/iio:deviceX/out_voltageY_scale
-What:		/sys/bus/iio/devices/iio:deviceX/out_altvoltageY_scale
 What:		/sys/bus/iio/devices/iio:deviceX/in_accel_scale
 What:		/sys/bus/iio/devices/iio:deviceX/in_accel_peak_scale
 What:		/sys/bus/iio/devices/iio:deviceX/in_anglvel_scale
@@ -274,7 +273,6 @@ What:		/sys/bus/iio/devices/iio:deviceX/in_accel_scale_available
 What:		/sys/.../iio:deviceX/in_voltageX_scale_available
 What:		/sys/.../iio:deviceX/in_voltage-voltage_scale_available
 What:		/sys/.../iio:deviceX/out_voltageX_scale_available
-What:		/sys/.../iio:deviceX/out_altvoltageX_scale_available
 What:		/sys/.../iio:deviceX/in_capacitance_scale_available
 KernelVersion:	2.635
 Contact:	linux-iio@vger.kernel.org
@@ -300,19 +298,14 @@ Description:
 		gives the 3dB frequency of the filter in Hz.
 
 What:		/sys/bus/iio/devices/iio:deviceX/out_voltageY_raw
-What:		/sys/bus/iio/devices/iio:deviceX/out_altvoltageY_raw
 KernelVersion:	2.6.37
 Contact:	linux-iio@vger.kernel.org
 Description:
 		Raw (unscaled, no bias etc.) output voltage for
 		channel Y.  The number must always be specified and
 		unique if the output corresponds to a single channel.
-		While DAC like devices typically use out_voltage,
-		a continuous frequency generating device, such as
-		a DDS or PLL should use out_altvoltage.
 
 What:		/sys/bus/iio/devices/iio:deviceX/out_voltageY&Z_raw
-What:		/sys/bus/iio/devices/iio:deviceX/out_altvoltageY&Z_raw
 KernelVersion:	2.6.37
 Contact:	linux-iio@vger.kernel.org
 Description:
@@ -323,8 +316,6 @@ Description:
 
 What:		/sys/bus/iio/devices/iio:deviceX/out_voltageY_powerdown_mode
 What:		/sys/bus/iio/devices/iio:deviceX/out_voltage_powerdown_mode
-What:		/sys/bus/iio/devices/iio:deviceX/out_altvoltageY_powerdown_mode
-What:		/sys/bus/iio/devices/iio:deviceX/out_altvoltage_powerdown_mode
 KernelVersion:	2.6.38
 Contact:	linux-iio@vger.kernel.org
 Description:
@@ -339,8 +330,6 @@ Description:
 
 What:		/sys/.../iio:deviceX/out_votlageY_powerdown_mode_available
 What:		/sys/.../iio:deviceX/out_voltage_powerdown_mode_available
-What:		/sys/.../iio:deviceX/out_altvotlageY_powerdown_mode_available
-What:		/sys/.../iio:deviceX/out_altvoltage_powerdown_mode_available
 KernelVersion:	2.6.38
 Contact:	linux-iio@vger.kernel.org
 Description:
@@ -349,8 +338,6 @@ Description:
 
 What:		/sys/bus/iio/devices/iio:deviceX/out_voltageY_powerdown
 What:		/sys/bus/iio/devices/iio:deviceX/out_voltage_powerdown
-What:		/sys/bus/iio/devices/iio:deviceX/out_altvoltageY_powerdown
-What:		/sys/bus/iio/devices/iio:deviceX/out_altvoltage_powerdown
 KernelVersion:	2.6.38
 Contact:	linux-iio@vger.kernel.org
 Description:
@@ -359,24 +346,6 @@ Description:
 		normal operation. Y may be suppressed if all outputs are
 		controlled together.
 
-What:		/sys/bus/iio/devices/iio:deviceX/out_altvoltageY_frequency
-KernelVersion:	3.4.0
-Contact:	linux-iio@vger.kernel.org
-Description:
-		Output frequency for channel Y in Hz. The number must always be
-		specified and unique if the output corresponds to a single
-		channel.
-
-What:		/sys/bus/iio/devices/iio:deviceX/out_altvoltageY_phase
-KernelVersion:	3.4.0
-Contact:	linux-iio@vger.kernel.org
-Description:
-		Phase in radians of one frequency/clock output Y
-		(out_altvoltageY) relative to another frequency/clock output
-		(out_altvoltageZ) of the device X. The number must always be
-		specified and unique if the output corresponds to a single
-		channel.
-
 What:		/sys/bus/iio/devices/iio:deviceX/events
 KernelVersion:	2.6.35
 Contact:	linux-iio@vger.kernel.org

diff --git a/trunk/Documentation/DocBook/media/v4l/pixfmt.xml b/trunk/Documentation/DocBook/media/v4l/pixfmt.xml
@@ -986,13 +986,13 @@ http://www.thedirks.org/winnov/</ulink></para></entry>
 	  <row id="V4L2-PIX-FMT-Y4">
 	    <entry><constant>V4L2_PIX_FMT_Y4</constant></entry>
 	    <entry>'Y04 '</entry>
-	    <entry>Old 4-bit greyscale format. Only the most significant 4 bits of each byte are used,
+	    <entry>Old 4-bit greyscale format. Only the least significant 4 bits of each byte are used,
 the other bits are set to 0.</entry>
 	  </row>
 	  <row id="V4L2-PIX-FMT-Y6">
 	    <entry><constant>V4L2_PIX_FMT_Y6</constant></entry>
 	    <entry>'Y06 '</entry>
-	    <entry>Old 6-bit greyscale format. Only the most significant 6 bits of each byte are used,
+	    <entry>Old 6-bit greyscale format. Only the least significant 6 bits of each byte are used,
 the other bits are set to 0.</entry>
 	  </row>
 	</tbody>

diff --git a/trunk/Documentation/DocBook/media/v4l/v4l2.xml b/trunk/Documentation/DocBook/media/v4l/v4l2.xml
@@ -560,14 +560,14 @@ and discussions on the V4L mailing list.</revremark>
     &sub-g-tuner;
     &sub-log-status;
     &sub-overlay;
-    &sub-prepare-buf;
     &sub-qbuf;
     &sub-querybuf;
     &sub-querycap;
     &sub-queryctrl;
     &sub-query-dv-preset;
     &sub-query-dv-timings;
     &sub-querystd;
+    &sub-prepare-buf;
     &sub-reqbufs;
     &sub-s-hw-freq-seek;
     &sub-streamon;

diff --git a/trunk/Documentation/DocBook/media/v4l/vidioc-create-bufs.xml b/trunk/Documentation/DocBook/media/v4l/vidioc-create-bufs.xml
@@ -108,9 +108,10 @@ information.</para>
 /></entry>
 	  </row>
 	  <row>
-	    <entry>struct&nbsp;v4l2_format</entry>
+	    <entry>__u32</entry>
 	    <entry><structfield>format</structfield></entry>
-	    <entry>Filled in by the application, preserved by the driver.</entry>
+	    <entry>Filled in by the application, preserved by the driver.
+	    See <xref linkend="v4l2-format" />.</entry>
 	  </row>
 	  <row>
 	    <entry>__u32</entry>

diff --git a/trunk/Documentation/DocBook/media/v4l/vidioc-dqevent.xml b/trunk/Documentation/DocBook/media/v4l/vidioc-dqevent.xml
@@ -89,7 +89,7 @@
 	  <row>
 	    <entry></entry>
 	    <entry>&v4l2-event-frame-sync;</entry>
-            <entry><structfield>frame_sync</structfield></entry>
+            <entry><structfield>frame</structfield></entry>
 	    <entry>Event data for event V4L2_EVENT_FRAME_SYNC.</entry>
 	  </row>
 	  <row>

diff --git a/trunk/Documentation/arm/SPEAr/overview.txt b/trunk/Documentation/arm/SPEAr/overview.txt
@@ -60,4 +60,4 @@ Introduction
   Document Author
   ---------------
 
-  Viresh Kumar <viresh.linux@gmail.com>, (c) 2010-2012 ST Microelectronics
+  Viresh Kumar <viresh.kumar@st.com>, (c) 2010-2012 ST Microelectronics
diff --git a/trunk/Documentation/device-mapper/verity.txt b/trunk/Documentation/device-mapper/verity.txt
@@ -7,39 +7,39 @@ This target is read-only.
 
 Construction Parameters
 =======================
-    <version> <dev> <hash_dev>
+    <version> <dev> <hash_dev> <hash_start>
     <data_block_size> <hash_block_size>
     <num_data_blocks> <hash_start_block>
     <algorithm> <digest> <salt>
 
 <version>
-    This is the type of the on-disk hash format.
+    This is the version number of the on-disk format.
 
     0 is the original format used in the Chromium OS.
-      The salt is appended when hashing, digests are stored continuously and
-      the rest of the block is padded with zeros.
+	The salt is appended when hashing, digests are stored continuously and
+	the rest of the block is padded with zeros.
 
     1 is the current format that should be used for new devices.
-      The salt is prepended when hashing and each digest is
-      padded with zeros to the power of two.
+	The salt is prepended when hashing and each digest is
+	padded with zeros to the power of two.
 
 <dev>
-    This is the device containing data, the integrity of which needs to be
+    This is the device containing the data the integrity of which needs to be
     checked.  It may be specified as a path, like /dev/sdaX, or a device number,
     <major>:<minor>.
 
 <hash_dev>
-    This is the device that supplies the hash tree data.  It may be
+    This is the device that that supplies the hash tree data.  It may be
     specified similarly to the device path and may be the same device.  If the
-    same device is used, the hash_start should be outside the configured
-    dm-verity device.
+    same device is used, the hash_start should be outside of the dm-verity
+    configured device size.
 
 <data_block_size>
-    The block size on a data device in bytes.
-    Each block corresponds to one digest on the hash device.
+    The block size on a data device.  Each block corresponds to one digest on
+    the hash device.
 
 <hash_block_size>
-    The size of a hash block in bytes.
+    The size of a hash block.
 
 <num_data_blocks>
     The number of data blocks on the data device.  Additional blocks are
@@ -65,28 +65,28 @@ Construction Parameters
 Theory of operation
 ===================
 
-dm-verity is meant to be set up as part of a verified boot path.  This
+dm-verity is meant to be setup as part of a verified boot path.  This
 may be anything ranging from a boot using tboot or trustedgrub to just
 booting from a known-good device (like a USB drive or CD).
 
 When a dm-verity device is configured, it is expected that the caller
 has been authenticated in some way (cryptographic signatures, etc).
 After instantiation, all hashes will be verified on-demand during
 disk access.  If they cannot be verified up to the root node of the
-tree, the root hash, then the I/O will fail.  This should detect
+tree, the root hash, then the I/O will fail.  This should identify
 tampering with any data on the device and the hash data.
 
 Cryptographic hashes are used to assert the integrity of the device on a
-per-block basis. This allows for a lightweight hash computation on first read
-into the page cache. Block hashes are stored linearly, aligned to the nearest
-block size.
+per-block basis.  This allows for a lightweight hash computation on first read
+into the page cache.  Block hashes are stored linearly-aligned to the nearest
+block the size of a page.
 
 Hash Tree
 ---------
 
 Each node in the tree is a cryptographic hash.  If it is a leaf node, the hash
-of some data block on disk is calculated. If it is an intermediary node,
-the hash of a number of child nodes is calculated.
+is of some block data on disk.  If it is an intermediary node, then the hash is
+of a number of child nodes.
 
 Each entry in the tree is a collection of neighboring nodes that fit in one
 block.  The number is determined based on block_size and the size of the
@@ -110,46 +110,85 @@ alg = sha256, num_blocks = 32768, block_size = 4096
 On-disk format
 ==============
 
-The verity kernel code does not read the verity metadata on-disk header.
-It only reads the hash blocks which directly follow the header.
-It is expected that a user-space tool will verify the integrity of the
-verity header.
+Below is the recommended on-disk format. The verity kernel code does not
+read the on-disk header. It only reads the hash blocks which directly
+follow the header. It is expected that a user-space tool will verify the
+integrity of the verity_header and then call dmsetup with the correct
+parameters. Alternatively, the header can be omitted and the dmsetup
+parameters can be passed via the kernel command-line in a rooted chain
+of trust where the command-line is verified.
 
-Alternatively, the header can be omitted and the dmsetup parameters can
-be passed via the kernel command-line in a rooted chain of trust where
-the command-line is verified.
+The on-disk format is especially useful in cases where the hash blocks
+are on a separate partition. The magic number allows easy identification
+of the partition contents. Alternatively, the hash blocks can be stored
+in the same partition as the data to be verified. In such a configuration
+the filesystem on the partition would be sized a little smaller than
+the full-partition, leaving room for the hash blocks.
+
+struct superblock {
+	uint8_t signature[8]
+		"verity\0\0";
+
+	uint8_t version;
+		1 - current format
+
+	uint8_t data_block_bits;
+		log2(data block size)
+
+	uint8_t hash_block_bits;
+		log2(hash block size)
+
+	uint8_t pad1[1];
+		zero padding
+
+	uint16_t salt_size;
+		big-endian salt size
+
+	uint8_t pad2[2];
+		zero padding
+
+	uint32_t data_blocks_hi;
+		big-endian high 32 bits of the 64-bit number of data blocks
+
+	uint32_t data_blocks_lo;
+		big-endian low 32 bits of the 64-bit number of data blocks
+
+	uint8_t algorithm[16];
+		cryptographic algorithm
+
+	uint8_t salt[384];
+		salt (the salt size is specified above)
+
+	uint8_t pad3[88];
+		zero padding to 512-byte boundary
+}
 
 Directly following the header (and with sector number padded to the next hash
 block boundary) are the hash blocks which are stored a depth at a time
 (starting from the root), sorted in order of increasing index.
 
-The full specification of kernel parameters and on-disk metadata format
-is available at the cryptsetup project's wiki page
-  http://code.google.com/p/cryptsetup/wiki/DMVerity
-
 Status
 ======
 V (for Valid) is returned if every check performed so far was valid.
 If any check failed, C (for Corruption) is returned.
 
 Example
 =======
-Set up a device:
-  # dmsetup create vroot --readonly --table \
-    "0 2097152 verity 1 /dev/sda1 /dev/sda2 4096 4096 262144 1 sha256 "\
+
+Setup a device:
+  dmsetup create vroot --table \
+    "0 2097152 "\
+    "verity 1 /dev/sda1 /dev/sda2 4096 4096 2097152 1 "\
     "4392712ba01368efdf14b05c76f9e4df0d53664630b5d48632ed17a137f39076 "\
     "1234000000000000000000000000000000000000000000000000000000000000"
 
 A command line tool veritysetup is available to compute or verify
-the hash tree or activate the kernel device. This is available from
-the cryptsetup upstream repository http://code.google.com/p/cryptsetup/
-(as a libcryptsetup extension).
-
-Create hash on the device:
-  # veritysetup format /dev/sda1 /dev/sda2
-  ...
-  Root hash: 4392712ba01368efdf14b05c76f9e4df0d53664630b5d48632ed17a137f39076
-
-Activate the device:
-  # veritysetup create vroot /dev/sda1 /dev/sda2 \
-    4392712ba01368efdf14b05c76f9e4df0d53664630b5d48632ed17a137f39076
+the hash tree or activate the kernel driver.  This is available from
+the LVM2 upstream repository and may be supplied as a package called
+device-mapper-verity-tools:
+    git://sources.redhat.com/git/lvm2
+    http://sourceware.org/git/?p=lvm2.git
+    http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/verity?cvsroot=lvm2
+
+veritysetup -a vroot /dev/sda1 /dev/sda2 \
+	4392712ba01368efdf14b05c76f9e4df0d53664630b5d48632ed17a137f39076