- 18 Feb, 2015 1 commit
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds authored
Pull lazytime mount option support from Al Viro: "Lazytime stuff from tytso" * 'lazytime' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: ext4: add optimization for the lazytime mount option vfs: add find_inode_nowait() function vfs: add support for a lazytime mount option
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- 17 Feb, 2015 39 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds authored
Pull iov_iter updates from Al Viro: "More iov_iter work - missing counterpart of iov_iter_init() for bvec-backed ones and vfs_read_iter()/vfs_write_iter() - wrappers for sync calls of ->read_iter()/->write_iter()" * 'iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: fs: add vfs_iter_{read,write} helpers new helper: iov_iter_bvec()
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds authored
Pull getname/putname updates from Al Viro: "Rework of getname/getname_kernel/etc., mostly from Paul Moore. Gets rid of quite a pile of kludges between namei and audit..." * 'getname2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: audit: replace getname()/putname() hacks with reference counters audit: fix filename matching in __audit_inode() and __audit_inode_child() audit: enable filename recording via getname_kernel() simpler calling conventions for filename_mountpoint() fs: create proper filename objects using getname_kernel() fs: rework getname_kernel to handle up to PATH_MAX sized filenames cut down the number of do_path_lookup() callers
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds authored
Pull debugfs patches from Al Viro: "debugfs patches, mostly to make it possible for something like tracefs to be transparently automounted on given directory in debugfs. New primitive in there is debugfs_create_automount(name, parent, func, arg), which creates a directory and makes its ->d_automount() return func(arg). Another missing primitive was debugfs_create_file_size() - open-coded in quite a few places. Dave's patch adds it and converts the open-code instances to calling it" * 'debugfs_automount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: debugfs: Provide a file creation function that also takes an initial size new primitive: debugfs_create_automount() debugfs: split end_creating() into success and failure cases debugfs: take mode-dependent parts of debugfs_get_inode() into callers fold debugfs_mknod() into callers fold debugfs_create() into caller fold debugfs_mkdir() into caller debugfs_mknod(): get rid useless arguments fold debugfs_link() into caller debugfs: kill __create_file() debugfs: split the beginning and the end of __create_file() off debugfs_{mkdir,create,link}(): get rid of redundant argument
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds authored
Pull misc VFS updates from Al Viro: "This cycle a lot of stuff sits on topical branches, so I'll be sending more or less one pull request per branch. This is the first pile; more to follow in a few. In this one are several misc commits from early in the cycle (before I went for separate branches), plus the rework of mntput/dput ordering on umount, switching to use of fs_pin instead of convoluted games in namespace_unlock()" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: switch the IO-triggering parts of umount to fs_pin new fs_pin killing logics allow attaching fs_pin to a group not associated with some superblock get rid of the second argument of acct_kill() take count and rcu_head out of fs_pin dcache: let the dentry count go down to zero without taking d_lock pull bumping refcount into ->kill() kill pin_put() mode_t whack-a-mole: chelsio file->f_path.dentry is pinned down for as long as the file is open... get rid of lustre_dump_dentry() gut proc_register() a bit kill d_validate() ncpfs: get rid of d_validate() nonsense selinuxfs: don't open-code d_genocide()
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Linus Torvalds authored
Merge yet more updates from Andrew Morton: - a pile of minor fs fixes and cleanups - kexec updates - random misc fixes in various places: vmcore, rbtree, eventfd, ipc, seccomp. - a series of python-based kgdb helper scripts * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (58 commits) seccomp: cap SECCOMP_RET_ERRNO data to MAX_ERRNO samples/seccomp: improve label helper ipc,sem: use current->state helpers scripts/gdb: disable pagination while printing from breakpoint handler scripts/gdb: define maintainer scripts/gdb: convert CpuList to generator function scripts/gdb: convert ModuleList to generator function scripts/gdb: use a generator instead of iterator for task list scripts/gdb: ignore byte-compiled python files scripts/gdb: port to python3 / gdb7.7 scripts/gdb: add basic documentation scripts/gdb: add lx-lsmod command scripts/gdb: add class to iterate over CPU masks scripts/gdb: add lx_current convenience function scripts/gdb: add internal helper and convenience function for per-cpu lookup scripts/gdb: add get_gdbserver_type helper scripts/gdb: add internal helper and convenience function to retrieve thread_info scripts/gdb: add is_target_arch helper scripts/gdb: add helper and convenience function to look up tasks scripts/gdb: add task iteration class ...
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Kees Cook authored
The value resulting from the SECCOMP_RET_DATA mask could exceed MAX_ERRNO when setting errno during a SECCOMP_RET_ERRNO filter action. This makes sure we have a reliable value being set, so that an invalid errno will not be ignored by userspace. Signed-off-by:
Kees Cook <keescook@chromium.org> Reported-by:
Dmitry V. Levin <ldv@altlinux.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Will Drewry <wad@chromium.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Kees Cook authored
Fixes a potential corruption with uninitialized stack memory in the seccomp BPF sample program. [akpm@linux-foundation.org: coding-style fixlet] Signed-off-by:
Robert Swiecki <swiecki@google.com> Tested-by:
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Davidlohr Bueso authored
Call __set_current_state() instead of assigning the new state directly. These interfaces also aid CONFIG_DEBUG_ATOMIC_SLEEP environments, keeping track of who changed the state. Signed-off-by:
Davidlohr Bueso <dbueso@suse.de> Signed-off-by:
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Jan Kiszka authored
While reporting the (refreshed) list of modules on automatic updates we may hit the page boundary of the output console and cause a stop if pagination is enabled. However, gdb does not accept user input while running over the breakpoint handler. So we get stuck, and the user is forced to interrupt gdb. Resolve this by disabling pagination during automatic symbol updates. We restore the user's configuration once done. Signed-off-by:
Jan Kiszka <jan.kiszka@siemens.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Ben Widawsky <ben@bwidawsk.net> Cc: Borislav Petkov <bp@suse.de> Signed-off-by:
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Jan Kiszka authored
I'm proposing myself for keeping an eye on these scripts and integrating contributions. Signed-off-by:
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Jan Kiszka authored
Yet another code simplification. Signed-off-by:
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Jan Kiszka authored
Analogously to the task list, convert the module list to a generator function. It noticeably simplifies the code. Signed-off-by:
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Daniel Wagner authored
The iterator does not return any task_struct from the thread_group list because the first condition in the 'if not t or ...' will only be the first time None. Instead of keeping track of the state ourself in the next() function, we fall back using Python's generator. Signed-off-by:
Daniel Wagner <daniel.wagner@bmw-carit.de> Signed-off-by:
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Daniel Thompson authored
Using the gdb scripts leaves byte-compiled python files in the scripts/ directory. These should be ignored by git. [jan.kiszka@siemens.com: drop redundant mrproper rule as suggested by Michal] Signed-off-by:
Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by:
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Pantelis Koukousoulas authored
I tried to use these scripts in an ubuntu 14.04 host (gdb 7.7 compiled against python 3.3) but there were several errors. I believe this patch fixes these issues so that the commands now work (I tested lx-symbols, lx-dmesg, lx-lsmod). Main issues that needed to be resolved: * In python 2 iterators have a "next()" method. In python 3 it is __next__() instead (so let's just add both). * In older python versions there was an implicit conversion in object.__format__() (used when an object is in string.format()) where it was converting the object to str first and then calling str's __format__(). This has now been removed so we must explicitly convert to str the objects for which we need to keep this behavior. * In dmesg.py: in python 3 log_buf is now a "memoryview" object which needs to be converted to a string in order to use string methods like "splitlines()". Luckily memoryview exists in python 2.7.6 as well, so we can convert log_buf to memoryview and use the same code in both python 2 and python 3. This version of the patch has now been tested with gdb 7.7 and both python 3.4 and python 2.7.6 (I think asking for at least python 2.7.6 is a reasonable requirement instead of complicating the code with version checks etc). Signed-off-by:Pantelis Koukousoulas <pktoss@gmail.com> Signed-off-by:
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Jan Kiszka authored
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Jan Kiszka authored
This adds a lsmod-like command to list all currently loaded modules of the target. Signed-off-by:
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Jan Kiszka authored
Will be used first to count module references. It is optimized to read the mask only once per stop. Signed-off-by:
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Jan Kiszka authored
This is a shorthand for *$lx_per_cpu("current_task"), i.e. a convenience function to retrieve the currently running task of the active context. Signed-off-by: -
Jan Kiszka authored
This function allows to obtain a per-cpu variable, either of the current or an explicitly specified CPU. Note: sparc64 version is untested. Signed-off-by:
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Jan Kiszka authored
This helper probes the type of the gdb server. Supported are QEMU and KGDB so far. Knowledge about the gdb server is required e.g. to retrieve the current CPU or current task. Signed-off-by:
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Jan Kiszka authored
Add the internal helper get_thread_info that calculates the thread_info from a given task variable. Also export this service as a convenience function. Note: ia64 version is untested. Signed-off-by:
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Jan Kiszka authored
This helper caches to result of "show architecture" and matches the provided arch (sub-)string against that output. Signed-off-by:
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Jan Kiszka authored
Add the helper task_by_pid that can look up a task by its PID. Also export it as a convenience function. Signed-off-by:
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Jan Kiszka authored
This class allows to iterate over all tasks of the target. Signed-off-by:
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Jan Kiszka authored
This pokes into the log buffer of the debugged kernel, dumping it to the gdb console. Helping in case the target should or can no longer execute dmesg itself. Signed-off-by:
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Jan Kiszka authored
Add helpers for reading integers from target memory buffers. Required when caching the memory access is more efficient than reading individual values via gdb. Signed-off-by:
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Jan Kiszka authored
Parse the target endianness from the output of "show endian" and cache the result to return it via the new helper get_target_endiannes. We will need it for reading integers from buffers that contain target memory. Signed-off-by:
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Jan Kiszka authored
Add the internal helper get_module_by_name to obtain the module structure corresponding to the given name. Also export this service as a convenience function. Signed-off-by:
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Jan Kiszka authored
This installs a silent breakpoint on the do_init_module function. The breakpoint handler will try to load symbols from the module files found during lx-symbols execution. This way, breakpoints can be set to module initialization functions, and there is no need to explicitly call lx-symbols after (re-)loading a module. Signed-off-by:
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Jan Kiszka authored
This provides a reliable breakpoint target, required for automatic symbol loading via the gdb helper command 'lx-symbols'. Signed-off-by:
Rusty Russell <rusty@rustcorp.com.au> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Ben Widawsky <ben@bwidawsk.net> Cc: Borislav Petkov <bp@suse.de> Signed-off-by:
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Jan Kiszka authored
This is probably the most useful helper when debugging kernel modules: lx-symbols first reloads vmlinux. Then it searches recursively for *.ko files in the specified paths and the current directory. Finally it walks the kernel's module list, issuing the necessary add-symbol-file command for each loaded module so that gdb knows which module symbol corresponds to which address. It also looks up variable sections (bss, data, rodata) and appends their address to the add-symbole-file command line. This allows to access global module variables just like any other variable. Signed-off-by:
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Jan Kiszka authored
Will soon be used for loading symbols, printing global variables or listing modules. Signed-off-by:
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Jan Kiszka authored
Provide an internal helper with container_of semantics. As type lookups are very slow in gdb-python and we need a type "long" for this, cache the reference to this type object. Then export the helper also as a convenience function form use at the gdb command line. Signed-off-by:
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Jan Kiszka authored
Type lookups are very slow in gdb-python which is often noticeable when iterating over a number of objects. Introduce the helper class CachedType that keeps a reference to a gdb.Type object but also refreshes it after an object file has been loaded. Signed-off-by:
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Jan Kiszka authored
This provides the basic infrastructure to load kernel-specific python helper scripts when debugging the kernel in gdb. The loading mechanism is based on gdb loading for <objfile>-gdb.py when opening <objfile>. Therefore, this places a corresponding link to the main helper script into the output directory that contains vmlinux. The main scripts will pull in submodules containing Linux specific gdb commands and functions. To avoid polluting the source directory with compiled python modules, we link to them from the object directory. Due to gdb.parse_and_eval and string redirection for gdb.execute, we depend on gdb >= 7.2. This feature is enabled via CONFIG_GDB_SCRIPTS. Signed-off-by:
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Fabian Frederick authored
Fix checkpatch error: ERROR: switch and case should be at the same indent Signed-off-by:
Fabian Frederick <fabf@skynet.be> Signed-off-by:
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Fabian Frederick authored
affs_symlink_inode_operations was already declared extern in affs.h Signed-off-by:
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Fabian Frederick authored
return is not needed at the end of function. Signed-off-by:
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