Commit Graph

504408 Commits

Author SHA1 Message Date
Bastien Nocera
fcbc32bc6c coredump: Fix typo in comment
Signed-off-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-02-20 04:56:44 -05:00
Kinglong Mee
acd88d4e1a fs/aio.c: Remove duplicate function name in pr_debug messages
Have defined pr_fmt as below in fs/aio.c, so remove duplicate
function name in pr_debug message.

#define pr_fmt(fmt) "%s: " fmt, __func__

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-02-20 04:56:44 -05:00
David Howells
112fc894a7 configfs: Fix potential NULL d_inode dereference
Code that does this:

		if (!(d_unhashed(dentry) && dentry->d_inode)) {
			...
			simple_unlink(parent->d_inode, dentry);
		}

is broken because:

    !(d_unhashed(dentry) && dentry->d_inode)

is equivalent to:

    !d_unhashed(dentry) || !dentry->d_inode

so it is possible to get into simple_unlink() with dentry->d_inode == NULL.

simple_unlink(), however, assumes dentry->d_inode cannot be NULL.

I think that what was meant is this:

    !d_unhashed(dentry) && dentry->d_inode

and that the logical-not operator or the final close-bracket was misplaced.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-02-20 04:56:43 -05:00
Al Viro
a457ac2854 hypfs: switch to read_iter/write_iter
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-02-20 04:56:28 -05:00
Al Viro
db671a8ecd don't bother with most of the bad_file_ops methods
Only ->open() should be there (always failing, of course).  We never
replace ->f_op of an already opened struct file, so there's no way
for any of those methods to be called.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-02-20 04:03:58 -05:00
Al Viro
28444a2bde configfs_add_file: fold into its sole caller
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-02-17 22:16:46 -05:00
Al Viro
1cf97d0d3a configfs: fold create_dir() into its only caller
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-02-17 22:16:35 -05:00
Al Viro
c88b1e70ae configfs: configfs_create() init callback is never NULL and it never fails
... so make it return void and drop the check for it being non-NULL

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-02-17 22:15:47 -05:00
Al Viro
dbca51ddb0 switch ll_lookup_finish_locks() and ll_revalidate_it_finish() to inode
Note that ll_prep_inode() in the latter does *not* modify ->d_inode;
it expects non-negative dentry, and in such cases ll_prep_inode() doesn't
modify *inode - it only uses the value.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-02-17 22:14:37 -05:00
Linus Torvalds
f5af19d10d Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking updates from David Miller:

 1) Missing netlink attribute validation in nft_lookup, from Patrick
    McHardy.

 2) Restrict ipv6 partial checksum handling to UDP, since that's the
    only case it works for.  From Vlad Yasevich.

 3) Clear out silly device table sentinal macros used by SSB and BCMA
    drivers.  From Joe Perches.

 4) Make sure the remote checksum code never creates a situation where
    the remote checksum is applied yet the tunneling metadata describing
    the remote checksum transformation is still present.  Otherwise an
    external entity might see this and apply the checksum again.  From
    Tom Herbert.

 5) Use msecs_to_jiffies() where applicable, from Nicholas Mc Guire.

 6) Don't explicitly initialize timer struct fields, use setup_timer()
    and mod_timer() instead.  From Vaishali Thakkar.

 7) Don't invoke tg3_halt() without the tp->lock held, from Jun'ichi
    Nomura.

 8) Missing __percpu annotation in ipvlan driver, from Eric Dumazet.

 9) Don't potentially perform skb_get() on shared skbs, also from Eric
    Dumazet.

10) Fix COW'ing of metrics for non-DST_HOST routes in ipv6, from Martin
    KaFai Lau.

11) Fix merge resolution error between the iov_iter changes in vhost and
    some bug fixes that occurred at the same time.  From Jason Wang.

12) If rtnl_configure_link() fails we have to perform a call to
    ->dellink() before unregistering the device.  From WANG Cong.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (39 commits)
  net: dsa: Set valid phy interface type
  rtnetlink: call ->dellink on failure when ->newlink exists
  com20020-pci: add support for eae single card
  vhost_net: fix wrong iter offset when setting number of buffers
  net: spelling fixes
  net/core: Fix warning while make xmldocs caused by dev.c
  net: phy: micrel: disable NAND-tree for KSZ8021, KSZ8031, KSZ8051, KSZ8081
  ipv6: fix ipv6_cow_metrics for non DST_HOST case
  openvswitch: Fix key serialization.
  r8152: restore hw settings
  hso: fix rx parsing logic when skb allocation fails
  tcp: make sure skb is not shared before using skb_get()
  bridge: netfilter: Move sysctl-specific error code inside #ifdef
  ipv6: fix possible deadlock in ip6_fl_purge / ip6_fl_gc
  ipvlan: add a missing __percpu pcpu_stats
  tg3: Hold tp->lock before calling tg3_halt() from tg3_init_one()
  bgmac: fix device initialization on Northstar SoCs (condition typo)
  qlcnic: Delete existing multicast MAC list before adding new
  net/mlx5_core: Fix configuration of log_uar_page_sz
  sunvnet: don't change gso data on clones
  ...
2015-02-17 17:41:19 -08:00
Linus Torvalds
0d695d6d8b 3 bug md fixes for 3.20
yet-another-livelock in raid5, and a problem with write errors
 to 4K-block devices.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2
 
 iQIVAwUAVOPorznsnt1WYoG5AQKa5A//RmLurotaJvHt8YA8jzlzo2KY/9jxIv8x
 jF0CQ0Kva056GG27dlkMPBoddrVk7/WaCoz/ICBKgfSTCpiEFekNlExLkeLXrgUb
 mKljS/HKhP4KQjiy519HiT2v9BRTqZD3l6P2405qVAZGTymwhelAp3y1I5ZIRFOr
 k2Uo6PNT/XYvzwWAy5iEBrE7zZl3MZJG5RjW2Wq6JKaWMUQaQERu5OhugWEfCI3U
 yVomILlwiYqC85WLgrVob/OqCSoA3UsIZkZKvKJCP8Y4C9QJzquEeZy4z0swgJq0
 FMsu2WqmI3/ZNFvmlSozN05CEUMkZF6E8hGJcT+f1Wa1NE40zrzDkVsVvsGMD8v0
 Ek7PTiA3X7AhqRl4Lt2Gs8kfDJ9MIRXzvXJv9UUO7PtVQGUhVdqmcqsodyqA7+lw
 63hgSpEUtQTkpeWwcYQY6Impr/6jGxHwQKzFlLltaDvmAeOBd6gjAq2bdfPO5tox
 FiSoClhor4yTc274+s5ORk9xDh61d7ZbnFJ+QN7YioyaSD2LHYIl9EkVFDe4OMXV
 q39VzXt+uEYx6hxfmnpjPyPvPiyuDsnXzoTMcaaGsJL4TOazoIEj5AFGmg5i3/yw
 6UVjKxJ43SMM7qg3VbgZpenGJwvRkP5mqQwMNDZICXdWulQTMwM5w3AidNqwYAaU
 oEPAMfZNGvE=
 =1BWV
 -----END PGP SIGNATURE-----

Merge tag 'md/3.20-fixes' of git://neil.brown.name/md

Pull md bugfixes from Neil Brown:
 "Three bug md fixes for 3.20

  yet-another-livelock in raid5, and a problem with write errors to
  4K-block devices"

* tag 'md/3.20-fixes' of git://neil.brown.name/md:
  md/raid5: Fix livelock when array is both resyncing and degraded.
  md/raid10: round up to bdev_logical_block_size in narrow_write_error.
  md/raid1: round up to bdev_logical_block_size in narrow_write_error
2015-02-17 17:34:21 -08:00
Linus Torvalds
d96c757efa Fix regression - functions on the mce notifier chain should
not be able to decide that an event should not be logged
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJU47aGAAoJEKurIx+X31iBiX4P+wfq7uUKwQ4riD2jFppvhrcm
 W2Qx/iIv9QN77ZIw5I45VqGbDKXmlThl41ISem9BlKd8jKaldY3lUlQMfrPC5V11
 9bl/7LsZoQLlbuwYR6uiLdKqW9wd6d5Y1mczdSDM5wCtfMw/s+C/ETzuRVHsQZjF
 1LTB0rb0NPouX+y3D8aDrvk9Os5ozZsz3N/y6e3TsI/wV8d3rqwH8C8x3RjB2Evx
 3WRSwoSOq9kHEbeg1r7PMKYKWAoJs97Kwo4EgJELqn8fxYMWnSsoDZGr9P2PX8oT
 TKgSFPnhgCLw+qlWy81MM8hutnHKnN6oXcJKzE0nHtD8JlJ/M/HdDAPIg8G9aLIn
 ABxPg6OORs/4YJQYGFA8ixx3TfIMspMU2m9KGoCcerpGaHCHhrlylJyheUvhRkPP
 u8pjGz+31d3bVVRzCLJt1eqo3H/y0wcURWaemk23lcUIsdDqisjZDzZrZxyZuWaH
 eDTKmHsZB/I4wnOs4Ke+U7oo/u+NtBzPmBSJcshgKSONLPd7bSJtjckLoa3wSf5I
 q5DkZgxrUYkO6tIoAAi/N2tc/2qkjTOug79BP9YKN3elmv3nxW4gieSaUb5p16bd
 ORpZLt3SDKEPv+79a/1e7ZyR7ik9Evhzc+/72M1IZvmdr3uOjj+xkuE1uRU7vuvX
 44Jmx6mEtPK1mVBfwkdG
 =jAUs
 -----END PGP SIGNATURE-----

Merge tag 'please-pull-fixmcelog' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras

Pull mcelog regression fix from Tony Luck:
 "Fix regression - functions on the mce notifier chain should not be
  able to decide that an event should not be logged"

* tag 'please-pull-fixmcelog' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras:
  x86/mce: Fix regression. All error records should report via /dev/mcelog
2015-02-17 17:03:07 -08:00
Linus Torvalds
fbe4da49f8 Fix the DocBook build failure caused by the move of the i2o subsystem to
the staging tree.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJU4kq/AAoJEI3ONVYwIuV6dlUQAIYOnFwRGtZXp27vyAaACbUu
 IJmwCzgFdp/RLjyprhn8ZHhP1pf1ivAW2cxb2U516Hc6/wztqc/qQ2ZN2H2v6Drt
 nXUofbVlCQuhK+BaollAA9fUg3KYUY/ygNKc/op29BxIcuQxAeE4CP3pEwReJoGx
 m6niYf2UNr2Z/aivE1JHz7v+Wx8YiPP+7cM35a8vN/lzxieWtL6kVGkNLSjZ92iC
 OhYfalEW8ktJ62wcmZ/QOEDn2CIX2mLP6X89334rDK+hVRrEei3+zA/OnSlV8zbs
 t3TKB4oJPiQBjLdFjwszMQ0CBpA1IWxSvlSJNINuWDm5vFC2Bg0T9XXiHAFePhM8
 Pp0IwOGXZM0LluNB7WAjJw81u3LkQYWNOj00VFsZ9yvABQBqfLhsv6tfB+0kCpDX
 YKZ7Dja0c3K3NGG3tM5ctqBK8pPVPvT0dITdOuTf6ZtJCvlpb3hhYiMnRoU64F7m
 Owz621VKum4p4pFHMo4kVsM5Ek1B5ugZehXtNZgEa5fou6D0P7i1fmtfktJkAE4+
 gys1sxDwNOGxe8vv+h7/nOUmCi4EV9hhW1fVLC3lKZdC4ppQyHmttDAKjQjTxIV5
 +BI8GXmrRyJ2U2ev6edeu+iLV5/aDldriHIp/Bj8gwhFo37+vyTdW2wT/MRtBh1h
 PHhV2R7eCXVhsSwf58Xc
 =CA9p
 -----END PGP SIGNATURE-----

Merge tag 'docs-fix' of git://git.lwn.net/linux-2.6

Pull DocBook build fix from Jonathan Corbet:
 "Fix the DocBook build failure caused by the move of the i2o subsystem
  to the staging tree"

* tag 'docs-fix' of git://git.lwn.net/linux-2.6:
  Fix docs build failure caused by i2o removal
2015-02-17 17:02:04 -08:00
Linus Torvalds
533cf7aef2 Merge branch 'for-3.20' of git://linux-nfs.org/~bfields/linux
Pull nfsd bugfixes from Bruce Fields:
 "These are fixes for two bugs introduced during the merge window"

* 'for-3.20' of git://linux-nfs.org/~bfields/linux:
  nfsd4: fix v3-less build
  nfsd: fix comparison in fh_fsid_match()
2015-02-17 17:00:54 -08:00
NeilBrown
26ac107378 md/raid5: Fix livelock when array is both resyncing and degraded.
Commit a7854487cd:
  md: When RAID5 is dirty, force reconstruct-write instead of read-modify-write.

Causes an RCW cycle to be forced even when the array is degraded.
A degraded array cannot support RCW as that requires reading all data
blocks, and one may be missing.

Forcing an RCW when it is not possible causes a live-lock and the code
spins, repeatedly deciding to do something that cannot succeed.

So change the condition to only force RCW on non-degraded arrays.

Reported-by: Manibalan P <pmanibalan@amiindia.co.in>
Bisected-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Tested-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Fixes: a7854487cd
Cc: stable@vger.kernel.org (v3.7+)
2015-02-18 11:35:14 +11:00
Linus Torvalds
038911597e Merge branch 'lazytime' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
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
2015-02-17 16:12:34 -08:00
Linus Torvalds
66dc830d14 Merge branch 'iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
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()
2015-02-17 15:48:33 -08:00
Linus Torvalds
05016b0f0a Merge branch 'getname2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
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
2015-02-17 15:27:47 -08:00
Linus Torvalds
c6b1de1b64 Merge branch 'debugfs_automount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
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
2015-02-17 15:18:19 -08:00
Linus Torvalds
50652963ea Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
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()
2015-02-17 14:56:45 -08:00
Linus Torvalds
e2b74f232e Merge branch 'akpm' (patches from Andrew)
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
  ...
2015-02-17 14:35:02 -08:00
Kees Cook
580c57f107 seccomp: cap SECCOMP_RET_ERRNO data to MAX_ERRNO
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>
2015-02-17 14:34:55 -08:00
Kees Cook
3a9af0bd34 samples/seccomp: improve label helper
Fixes a potential corruption with uninitialized stack memory in the
seccomp BPF sample program.

[akpm@linux-foundation.org: coding-style fixlet]
Signed-off-by: Kees Cook <keescook@chromium.org>
Reported-by: Robert Swiecki <swiecki@google.com>
Tested-by: Robert Swiecki <swiecki@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:55 -08:00
Davidlohr Bueso
52644c9ab3 ipc,sem: use current->state helpers
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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:55 -08:00
Jan Kiszka
a9c5bcfa43 scripts/gdb: disable pagination while printing from breakpoint handler
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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:55 -08:00
Jan Kiszka
158daf1673 scripts/gdb: define maintainer
I'm proposing myself for keeping an eye on these scripts and integrating
contributions.

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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:55 -08:00
Jan Kiszka
a77e15e8b4 scripts/gdb: convert CpuList to generator function
Yet another code simplification.

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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:55 -08:00
Jan Kiszka
fffb944c4e scripts/gdb: convert ModuleList to generator function
Analogously to the task list, convert the module list to a generator
function.  It noticeably simplifies the code.

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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:55 -08:00
Daniel Wagner
54e2289a34 scripts/gdb: use a generator instead of iterator for task list
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: 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:54 -08:00
Daniel Thompson
2478a8a15c scripts/gdb: ignore byte-compiled python files
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: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Michal Marek <mmarek@suse.cz>
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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:54 -08:00
Pantelis Koukousoulas
276d97d90a scripts/gdb: port to python3 / gdb7.7
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: 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:54 -08:00
Jan Kiszka
bda1a92167 scripts/gdb: add basic documentation
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Rob Landley <rob@landley.net>
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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:54 -08:00
Jan Kiszka
5403727f98 scripts/gdb: add lx-lsmod command
This adds a lsmod-like command to list all currently loaded modules of the
target.

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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:54 -08:00
Jan Kiszka
3d4cd9c941 scripts/gdb: add class to iterate over CPU masks
Will be used first to count module references.  It is optimized to read
the mask only once per stop.

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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:54 -08:00
Jan Kiszka
116b47b4da scripts/gdb: add lx_current convenience function
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 <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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:54 -08:00
Jan Kiszka
fe7f9ed98d scripts/gdb: add internal helper and convenience function for per-cpu lookup
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: Jan Kiszka <jan.kiszka@siemens.com>
Cc: "David S. Miller" <davem@davemloft.net>
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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:54 -08:00
Jan Kiszka
a4d86792c7 scripts/gdb: add get_gdbserver_type helper
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: 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:54 -08:00
Jan Kiszka
cf7492e933 scripts/gdb: add internal helper and convenience function to retrieve thread_info
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: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:54 -08:00
Jan Kiszka
b24e2d21ac scripts/gdb: add is_target_arch helper
This helper caches to result of "show architecture" and matches the
provided arch (sub-)string against that output.

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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:54 -08:00
Jan Kiszka
4752871081 scripts/gdb: add helper and convenience function to look up tasks
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: 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:54 -08:00
Jan Kiszka
7704d58a85 scripts/gdb: add task iteration class
This class allows to iterate over all tasks of the target.

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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:54 -08:00
Jan Kiszka
ae7dbaad23 scripts/gdb: add lx-dmesg command
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: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Kay Sievers <kay@vrfy.org>
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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:53 -08:00
Jan Kiszka
78e8781723 scripts/gdb: add read_u16/32/64 helpers
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: 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:53 -08:00
Jan Kiszka
7f99496374 scripts/gdb: add get_target_endianness helper
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: 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:53 -08:00
Jan Kiszka
7b599ef535 scripts/gdb: add internal helper and convenience function to look up a module
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: 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:53 -08:00
Jan Kiszka
82b41e3d61 scripts/gdb: add automatic symbol reloading on module insertion
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: 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:53 -08:00
Jan Kiszka
be02a18623 kernel/module.c: do not inline do_init_module()
This provides a reliable breakpoint target, required for automatic symbol
loading via the gdb helper command 'lx-symbols'.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:53 -08:00
Jan Kiszka
66051720b8 scripts/gdb: add lx-symbols command
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: 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:53 -08:00
Jan Kiszka
850202e17d scripts/gdb: add module iteration class
Will soon be used for loading symbols, printing global variables or
listing modules.

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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:53 -08:00
Jan Kiszka
b0fecd8c57 scripts/gdb: add container_of helper and convenience function
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: 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:53 -08:00