- 06 Jan, 2009 40 commits
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Michael Halcrow authored
These functions support encrypting and encoding the filename contents. The encrypted filename contents may consist of any ASCII characters. This patch includes a custom encoding mechanism to map the ASCII characters to a reduced character set that is appropriate for filenames. Signed-off-by:
Michael Halcrow <mhalcrow@us.ibm.com> Cc: Dustin Kirkland <dustin.kirkland@gmail.com> Cc: Eric Sandeen <sandeen@redhat.com> Cc: Tyler Hicks <tchicks@us.ibm.com> Cc: David Kleikamp <shaggy@us.ibm.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Michael Halcrow authored
Extensions to the header file to support filename encryption. Signed-off-by:
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Michael Halcrow authored
This patchset implements filename encryption via a passphrase-derived mount-wide Filename Encryption Key (FNEK) specified as a mount parameter. Each encrypted filename has a fixed prefix indicating that eCryptfs should try to decrypt the filename. When eCryptfs encounters this prefix, it decodes the filename into a tag 70 packet and then decrypts the packet contents using the FNEK, setting the filename to the decrypted filename. Both unencrypted and encrypted filenames can reside in the same lower filesystem. Because filename encryption expands the length of the filename during the encoding stage, eCryptfs will not properly handle filenames that are already near the maximum filename length. In the present implementation, eCryptfs must be able to produce a match against the lower encrypted and encoded filename representation when given a plaintext filename. Therefore, two files having the same plaintext name will encrypt and encode into the same lower filename if they are both encrypted using the same FNEK. This can be changed by finding a way to replace the prepended bytes in the blocked-aligned filename with random characters; they are hashes of the FNEK right now, so that it is possible to deterministically map from a plaintext filename to an encrypted and encoded filename in the lower filesystem. An implementation using random characters will have to decode and decrypt every single directory entry in any given directory any time an event occurs wherein the VFS needs to determine whether a particular file exists in the lower directory and the decrypted and decoded filenames have not yet been extracted for that directory. Thanks to Tyler Hicks and David Kleikamp for assistance in the development of this patchset. This patch: A tag 70 packet contains a filename encrypted with a Filename Encryption Key (FNEK). This patch implements functions for writing and parsing tag 70 packets. This patch also adds definitions and extends structures to support filename encryption. Signed-off-by:
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Randy Dunlap authored
Remove excess kernel-doc function parameter notation from i2o/. Warning(drivers/message/i2o/iop.c:64): Excess function parameter 'msg' description in 'i2o_msg_get_wait' Warning(drivers/message/i2o/device.c:62): Excess function parameter 'drv' description in 'i2o_device_claim' Warning(drivers/message/i2o/device.c:95): Excess function parameter 'drv' description in 'i2o_device_claim_release' Warning(drivers/message/i2o/driver.c:186): Excess function parameter 'msg' description in 'i2o_driver_dispatch' Signed-off-by:
Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by:
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Masami Hiramatsu authored
Allow kprobes to probe module __init routines. When __init functions are freed, kprobes which probe those functions are set to "Gone" flag. These "Gone" probes are disarmed from the code and never be enabled. Signed-off-by:
Masami Hiramatsu <mhiramat@redhat.com> Acked-by:
Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by:
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Masami Hiramatsu authored
Add a module notifier call which notifies that the state of a module changes from MODULE_STATE_COMING to MODULE_STATE_LIVE. Signed-off-by:
Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
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Masami Hiramatsu authored
Remove called_from argument from kprobes which had been used for preventing self-refering of kernel module. However, since we don't keep module's refcount after registering kprobe any more, there is no reason to check that. This patch also simplifies registering/unregistering functions because we don't need to use __builtin_return_address(0) which was passed to called_from. [ananth@in.ibm.com: build fix] Signed-off-by:
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Masami Hiramatsu authored
Allows kprobes to probe __exit routine. This adds flags member to struct kprobe. When module is freed(kprobes hooks module_notifier to get this event), kprobes which probe the functions in that module are set to "Gone" flag to the flags member. These "Gone" probes are never be enabled. Users can check the GONE flag through debugfs. This also removes mod_refcounted, because we couldn't free a module if kprobe incremented the refcount of that module. [akpm@linux-foundation.org: document some locking] [mhiramat@redhat.com: bugfix: pass aggr_kprobe to arch_remove_kprobe] [mhiramat@redhat.com: bugfix: release old_p's insn_slot before error return] Signed-off-by:
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Masami Hiramatsu authored
Add __kprobes to kprobes internal functions for protecting from probing by kprobes itself. Signed-off-by:
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Masami Hiramatsu authored
Add kprobe_insn_mutex for protecting kprobe_insn_pages hlist, and remove kprobe_mutex from architecture dependent code. This allows us to call arch_remove_kprobe() (and free_insn_slot) while holding kprobe_mutex. Signed-off-by:
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Masami Hiramatsu authored
This series of patches allows kprobes to probe module's __init and __exit functions. This means, you can probe driver initialization and terminating. Currently, kprobes can't probe __init function because these functions are freed after module initialization. And it also can't probe module __exit functions because kprobe increments reference count of target module and user can't unload it. this means __exit functions never be called unless removing probes from the module. To solve both cases, this series of patches introduces GONE flag and sets it when the target code is freed(for this purpose, kprobes hooks MODULE_STATE_* events). This also removes refcount incrementing for allowing user to unload target module. Users can check which probes are GONE by debugfs interface. For taking timing of freeing module's .init text, these also include a patch which adds module's notifier of MODULE_STATE_LIVE event. This patch: Add within_module_core() and within_module_init() for checking whether an address is in the module .init.text section or .text section, and replace within() local inline functions in kernel/module.c with them. kprobes uses these functions to check where the kprobe is inserted. Signed-off-by:
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Masami Hiramatsu authored
Add testcases for *probe batch registration (register_kprobes) to kprobes sanity tests. Signed-off-by:
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Masami Hiramatsu authored
Call kprobe_target indirectly. This prevents gcc to unroll a noinline function in caller function. I ported patches which had been discussed on http://sources.redhat.com/bugzilla/show_bug.cgi?id=3542Signed-off-by:
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Masami Hiramatsu authored
When someone called register_*probe() from kernel-core code(not from module) and that probes a kernel module, users can remove the probed module because kprobe doesn't increment reference counter of the module. (on the other hand, if the kernel-module calls register_*probe, kprobe increments refcount of the probed module.) Currently, we have no register_*probe() calling from kernel-core(except smoke-test, but the smoke-test doesn't probe module), so there is no real bugs. But the logic is wrong(or not fair) and it can causes a problem when someone might want to probe module from kernel. After this patch is applied, even if someone put register_*probe() call in the kernel-core code, it increments the reference counter of the probed module, and it prevents user to remove the module until stopping probing it. Signed-off-by:
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Julia Lawall authored
In each case, if the NULL test is necessary, then the dereference should be moved below the NULL test. The semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ type T; expression E; identifier i,fld; statement S; @@ - T i = E->fld; + T i; ... when != E when != i if (E == NULL) S + i = E->fld; // </smpl> Signed-off-by:
Julia Lawall <julia@diku.dk> Acked-by:
David Brownell <dbrownell@users.sourceforge.net> Signed-off-by:
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Ben Dooks authored
Change the spi_s3c2410 driver to use the generic gpio calls that are now available. Signed-off-by:
Ben Dooks <ben-linux@fluff.org> Signed-off-by:
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Haavard Skinnemoen authored
This solves several issues: * It fixes the wrong idle clock polarity issue in a cleaner and less expensive way. * It handles the AT32AP7000 errata "SPI Chip Select 0 BITS field overrides other Chip Selects". Other chips, e.g. AT91SAM9261, have similar issues. Currently, the AT91RM9200 code path is left alone. But it might be interesting to try the same technique on RM9200 using a different CSR register. [dbrownell@users.sourceforge.net: restore debug message for activation] Signed-off-by:Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Signed-off-by:
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Haavard Skinnemoen authored
Currently, we have a flag called "new_1" which is basically equivalent to cpu_is_at91rm9200(). The latter is also called directly a few places. Clean up this mess by introducing a atmel_spi_v2() function for determining the controller version, and move all version dependent code over to use it. This allows us to remove the new_1 flag. Signed-off-by:
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David Brownell authored
Generalize the old at91rm9200 "bootstrap" bitbanging SPI master driver as "spi_gpio", so it works with arbitrary GPIOs and can be configured through platform_data. Such SPI masters support: - any number of bus instances (bus_num is the platform_device.id) - any number of chipselects (one GPIO per spi_device) - all four SPI_MODE values, and SPI_CS_HIGH - i/o word sizes from 1 to 32 bits; - devices configured as with any other spi_master controller When configured using platform_data, this provides relatively low clock rates. On platforms that support inlined GPIO calls, significantly improved transfer speeds are also possible with a semi-custom driver. (It's still painful when accessing flash memory, but less so.) Sanity checked by using this version to replace both native controllers on a board with six different SPI slaves, relying on three different SPI_MODE_* values and both SPI_CS_HIGH settings for correct operation. [akpm@linux-foundation.org: cleanups] Signed-off-by:
Magnus Damm <damm@igel.co.jp> Tested-by:
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Randy Dunlap authored
Add missing kernel-doc notation: drivers/firmware/dmi_scan.c:475: No description found for parameter 'str' drivers/firmware/dmi_scan.c:592: No description found for parameter 'f' drivers/firmware/dmi_scan.c:592: No description found for parameter 'str' Signed-off-by:
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Qinghuang Feng authored
There are no argument named @flag in ncp_getopt(), remove it. Signed-off-by:
Qinghuang Feng <qhfeng.kernel@gmail.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Petr Vandrovec <VANDROVE@vc.cvut.cz> Signed-off-by:
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Qinghuang Feng authored
The following is what it looks like before patching. It is not much readable. user@ubuntu:/proc/sys/fs/binfmt_misc$ cat status enableduser@ubuntu:/proc/sys/fs/binfmt_misc$ Signed-off-by:
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Hiroshi Shimamoto authored
linux_binfmt uses list_head, so list.h is needed. [akpm@linux-foundation.org: fix `make headerscheck'] Signed-off-by:
Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by:
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Harvey Harrison authored
Signed-off-by:
Harvey Harrison <harvey.harrison@gmail.com> Cc: "Darrick J. Wong" <djwong@us.ibm.com> Signed-off-by:
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Henrik Rydberg authored
Add temperature sensor support for MacBook Air 2. Signed-off-by:
Henrik Rydberg <rydberg@euromail.se> Cc: Nicolas Boichat <nicolas@boichat.ch> Signed-off-by:
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Nicolas Palix authored
of_node_put is needed before discarding a value received from of_find_node_by_name, eg in error handling code or when the device node is no longer used. The semantic match that catches the bug is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @r exists@ local idexpression struct device_node *n; position p1, p2; struct device_node *n1; statement S; identifier f; expression E; expression *ptr != NULL; @@ n@p1 = of_find_node_by_name(...) ... if (!n) S ... when != of_node_put(n) when != n1 = f(n,...) when != E = n when any when strict ( return \(0\|<+...n...+>\|ptr\); | return@p2 ...; | of_node_put(n); | n1 = f(n,...) | E = n ) @script:python@ p1 << r.p1; p2 << r.p2; @@ print "* file: %s of_find_node_by_name %s return %s" % (p1[0].file,p1[0].line,p2[0].line) // </smpl> Signed-off-by:
Nicolas Palix <npalix@diku.dk> Signed-off-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
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Darrick J. Wong authored
It turns out that the adt7470's automatic fan control algorithm only works when the temperature sensors get updated. This in turn happens only when someone tells the chip to read its temperature sensors. Regrettably, this means that we have to drive the chip periodically. Signed-off-by:
Darrick J. Wong <djwong@us.ibm.com> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by:
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Darrick J. Wong authored
The adt7470 driver currently assumes that 1s is the proper time to wait to read all temperature sensors. However, the correct time is 200ms * number_of_sensors. This patch sets the default time to provide for 10 sensors and then lowers it based on the number of sensor inputs that have nozero values. Signed-off-by:
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Darrick J. Wong authored
In the small window that it takes to read the temperature sensors, the pwm outputs momentarily drop to 0. This causes a noticeable hiccup in fan speed, which is slightly annoying. The solution is to manually program the pwm output with whatever the automatic value is and then shift the fans to manual control while reading temperatures. Once that is done, put the fans back to whatever mode of control was there before. Signed-off-by:
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Darrick J. Wong authored
Modify some hwmon drivers to use DIV_ROUND_CLOSEST instead of bloating source with (naughty) macros. Signed-off-by:
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Andy Whitcroft authored
Signed-off-by:
Andy Whitcroft <apw@canonical.com> Signed-off-by:
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Andy Whitcroft authored
Clean up checkpatch using perlcritic. Signed-off-by:
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Andy Whitcroft authored
In the general use case struct file_operations should be a const object. Check for and warn where it is not. As suggested by Steven and Ingo. Acked-by:
Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Andy Whitcroft authored
When checking for assignments within if conditionals we check the whole of the condition, but the match is performed using a line constrained regular expression. This means we can miss split conditionals or those on the second line. Allow the check to span lines. Signed-off-by:
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Andy Whitcroft authored
Ensure we do not report identifiers containing the word static as static declarations. For example this should not be reported as an unecessary assignement of 0: long nr_static = 0; Signed-off-by:
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Andy Whitcroft authored
When picking up a complete statement or block for analysis we cannot simply track open/close/etc parenthesis we must take into account preprocessor section boundaries. Signed-off-by:
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Andy Whitcroft authored
We are miscategorising a continuation fragment following an operator which may lead to us thinking that there is a space after it when there is not. Fix this up. Signed-off-by:
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Andy Whitcroft authored
Loosen spacing checks to correctly detect this valid use of a typedef: typedef struct rcu_data *(*get_data_func)(int); Signed-off-by:
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Mike Frysinger authored
Seems like every other release we have someone who updates vmlinux.lds.h and adds C-visible symbols without VMLINUX_SYMBOL() around them. So start checking the file and reject assignments which have plain symbols on either side. [apw@canonical.com: soften the check, add tests] Signed-off-by:
Mike Frysinger <vapier@gentoo.org> Signed-off-by:
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Andy Whitcroft authored
It seems to be a common idiom to include braces on conditionals in all contexts including return. Allow this exception to the return is not a function checks. Reported by Kay Sievers. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by:
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