Mark Salyzyn 53d8e1c714 [PATCH v4 4/5] pstore: add pmsg ...

A secured user-space accessible pstore object. Writes
to /dev/pmsg0 are appended to the buffer, on reboot
the persistent contents are available in
/sys/fs/pstore/pmsg-ramoops-[ID].

One possible use is syslogd, or other daemon, can
write messages, then on reboot provides a means to
triage user-space activities leading up to a panic
as a companion to the pstore dmesg or console logs.

Signed-off-by: Mark Salyzyn <salyzyn@android.com>

v2: switch from snprintf to scnprintf
v3: split out prz_ok checking into PATCH 3/5
    replace pmsg_lseek with noop_llseek
    use pr_fmt() macro
    make write atomic and use a vmalloc'd bounce buffer
v4: use mutex_lock instead of spin_lock.

Change-Id: I82a2a9a989d7583c5fcb65ff520027dc3a034a4c

2015-01-13 16:22:01 -08:00

..

9p

aio: don't include aio.h in sched.h

2013-05-07 20:16:25 -07:00

adfs

fs: Limit sys_mount to only request filesystem modules.

2013-03-03 19:36:31 -08:00

affs

fs: Limit sys_mount to only request filesystem modules.

2013-03-03 19:36:31 -08:00

afs

aio: don't include aio.h in sched.h

2013-05-07 20:16:25 -07:00

autofs4

autofs - remove autofs dentry mount check

2013-05-06 13:06:59 -07:00

befs

befs_readdir(): do not increment ->f_pos if filldir tells us to stop

2013-05-31 15:17:56 -04:00

bfs

fs: Limit sys_mount to only request filesystem modules.

2013-03-03 19:36:31 -08:00

btrfs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs

2013-06-13 22:34:14 -07:00

cachefiles

lift sb_start_write() out of ->write()

2013-04-09 14:12:56 -04:00

ceph

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client

2013-06-12 08:28:19 -07:00

cifs

freezer: add unsafe versions of freezable helpers for CIFS

2013-07-01 15:38:02 -07:00

coda

lift sb_start_write() out of ->write()

2013-04-09 14:12:56 -04:00

configfs

fs: Limit sys_mount to only request filesystem modules.

2013-03-03 19:36:31 -08:00

cramfs

fs: Limit sys_mount to only request filesystem modules.

2013-03-03 19:36:31 -08:00

debugfs

fs: Limit sys_mount to only request filesystem modules.

2013-03-03 19:36:31 -08:00

devpts

fs: Limit sys_mount to only request filesystem modules (Part 2).

2013-03-07 01:08:55 -08:00

dlm

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

2013-05-01 14:08:52 -07:00

ecryptfs

eCryptfs: Check return of filemap_write_and_wait during fsync

2013-06-04 23:53:31 -07:00

efivarfs

efivarfs: Never return ENOENT from firmware again

2013-05-13 20:12:10 +01:00

efs

fs: Limit sys_mount to only request filesystem modules.

2013-03-03 19:36:31 -08:00

exofs

block: Add bio_for_each_segment_all()

2013-03-23 14:26:28 -07:00

exportfs

hlist: drop the node parameter from iterators

2013-02-27 19:10:24 -08:00

ext2

aio: don't include aio.h in sched.h

2013-05-07 20:16:25 -07:00

ext3

Merge branch 'akpm' (incoming from Andrew)

2013-05-07 20:49:51 -07:00

ext4

ext4: Add support for FIDTRIM, a best-effort ioctl for deep discard trim

2014-07-29 12:32:58 -07:00

f2fs

Merge tag 'f2fs-for-v3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs

2013-05-08 15:11:48 -07:00

fat

Add compat_ioctl support for VFAT_IOCTL_GET_VOLUME_ID

2013-09-26 00:27:26 +00:00

freevxfs

fs: Readd the fs module aliases.

2013-03-12 18:55:21 -07:00

fscache

fs/fscache/stats.c: fix memory leak

2013-04-29 15:54:27 -07:00

fuse

fuse: Freeze client on suspend when request sent to userspace

2013-07-01 13:40:37 -07:00

gfs2

GFS2: Don't cache iopen glocks

2013-06-03 16:40:22 +01:00

hfs

hfs: avoid crash in hfs_bnode_create

2013-05-24 16:22:51 -07:00

hfsplus

aio: don't include aio.h in sched.h

2013-05-07 20:16:25 -07:00

hostfs

hostfs: use kmalloc instead of kzalloc

2013-05-04 15:48:45 -04:00

hpfs

hpfs: fix warnings when the filesystem fills up

2013-06-08 17:39:40 -07:00

hppfs

hppfs: get rid of ->fsync()

2013-04-29 15:41:42 -04:00

hugetlbfs

cope with potentially long ->d_dname() output for shmem/hugetlb

2014-04-23 17:03:01 -07:00

isofs

fs: Readd the fs module aliases.

2013-03-12 18:55:21 -07:00

jbd

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

2013-05-03 09:56:25 -07:00

jbd2

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2013-05-01 17:51:54 -07:00

jffs2

fs: Limit sys_mount to only request filesystem modules.

2013-03-03 19:36:31 -08:00

jfs

fs/jfs: Add check if journaling to disk has been disabled in lbmRead()

2013-05-24 16:03:47 -05:00

lockd

LOCKD: Ensure that nlmclnt_block resets block->b_status after a server reboot

2013-04-21 18:08:42 -04:00

logfs

block: Remove bi_idx references

2013-03-23 14:15:31 -07:00

minix

fs: Limit sys_mount to only request filesystem modules.

2013-03-03 19:36:31 -08:00

ncpfs

ncpfs: fix rmdir returns Device or resource busy

2013-06-07 12:15:38 -04:00

nfs

freezer: add unsafe versions of freezable helpers for NFS

2013-07-01 15:37:43 -07:00

nfs_common

nfs_common: Update the translation between nfsv3 acls linux posix acls

2013-02-13 06:15:14 -08:00

nfsd

Merge branch 'for-3.10' of git://linux-nfs.org/~bfields/linux

2013-05-10 09:28:55 -07:00

nilfs2

nilfs2: fix issue of nilfs_set_page_dirty() for page at EOF boundary

2013-05-24 16:22:52 -07:00

nls

nls: fix (and rename) mac NLS table files and config options

2012-06-01 19:51:22 -07:00

notify

unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE

2013-05-09 13:46:38 -04:00

ntfs

aio: don't include aio.h in sched.h

2013-05-07 20:16:25 -07:00

ocfs2

ocfs2: add missing lockres put in dlm_mig_lockres_handler

2013-06-12 16:29:46 -07:00

omfs

fs: Limit sys_mount to only request filesystem modules.

2013-03-03 19:36:31 -08:00

openpromfs

fs: Limit sys_mount to only request filesystem modules.

2013-03-03 19:36:31 -08:00

proc

mm: add a field to store names for private anonymous memory

2013-09-19 14:14:28 -05:00

pstore

[PATCH v4 4/5] pstore: add pmsg

2015-01-13 16:22:01 -08:00

qnx4

fs: Limit sys_mount to only request filesystem modules.

2013-03-03 19:36:31 -08:00

qnx6

qnx6: qnx6_readdir() has a braino in pos calculation

2013-05-31 15:17:31 -04:00

quota

quota: add missing use of dq_data_lock in __dquot_initialize

2013-03-11 22:05:56 +01:00

ramfs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2013-02-26 20:16:07 -08:00

reiserfs

reiserfs: fix deadlock with nfs racing on create/lookup

2013-05-31 23:14:20 +02:00

romfs

romfs: fix nommu map length to keep inside filesystem

2013-04-29 09:17:57 +10:00

squashfs

fs: Limit sys_mount to only request filesystem modules. (Part 3)

2013-03-11 07:09:48 -07:00

sysfs

sysfs: check if one entry has been removed before freeing

2013-04-05 15:35:52 -07:00

sysv

fs: Readd the fs module aliases.

2013-03-12 18:55:21 -07:00

ubifs

UBIFS: fix a horrid bug

2013-06-29 12:45:37 +04:00

udf

aio: don't include aio.h in sched.h

2013-05-07 20:16:25 -07:00

ufs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2013-04-30 09:36:50 -07:00

xfs

xfs: don't shutdown log recovery on validation errors

2013-06-14 15:59:45 -05:00

aio.c

aio: fix io_destroy() regression by using call_rcu()

2013-06-12 16:29:46 -07:00

anon_inodes.c

get_empty_filp()/alloc_file() leave both ->f_pos and ->f_version zero

2013-02-26 02:46:11 -05:00

attr.c

userns: Allow chown and setgid preservation

2012-11-20 04:17:24 -08:00

bad_inode.c

lseek: the "whence" argument is called "whence"

2012-12-17 17:15:12 -08:00

binfmt_aout.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2013-05-01 17:51:54 -07:00

binfmt_elf_fdpic.c

Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

2013-05-02 10:16:16 -07:00

binfmt_elf.c

Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

2013-05-02 10:16:16 -07:00

binfmt_em86.c

exec: use -ELOOP for max recursion depth

2012-12-17 17:15:23 -08:00

binfmt_flat.c

new helper: read_code()

2013-04-29 15:40:23 -04:00

binfmt_misc.c

binfmt_misc: reuse string_unescape_inplace()

2013-04-30 17:04:03 -07:00

binfmt_script.c

exec: do not leave bprm->interp on stack

2012-12-20 17:40:19 -08:00

binfmt_som.c

get rid of pt_regs argument of ->load_binary()

2012-11-28 21:53:38 -05:00

bio-integrity.c

bio-integrity: Add explicit field for owner of bip_buf

2013-03-23 14:26:34 -07:00

bio.c

Merge branch 'for-3.10/core' of git://git.kernel.dk/linux-block

2013-05-08 10:13:35 -07:00

block_dev.c

Merge branch 'for-3.10/core' of git://git.kernel.dk/linux-block

2013-05-08 10:13:35 -07:00

buffer.c

Merge branch 'for-3.10/core' of git://git.kernel.dk/linux-block

2013-05-08 10:13:35 -07:00

char_dev.c

char_dev: pin parent kobject

2012-10-22 08:50:37 +03:00

compat_binfmt_elf.c

binfmt_elf: add ELF_HWCAP2 to compat auxv entries

2014-09-11 17:21:24 +00:00

compat_ioctl.c

Removed unused typedef to avoid "unused local typedef" warnings.

2013-05-04 15:03:05 -04:00

compat.c

aio: don't include aio.h in sched.h

2013-05-07 20:16:25 -07:00

coredump.c

do_coredump(): don't wait for thaw if coredump has already been interrupted

2013-05-04 14:45:54 -04:00

coredump.h

coredump: update coredump-related headers

2012-10-06 03:05:15 +09:00

dcache.c

cope with potentially long ->d_dname() output for shmem/hugetlb

2014-04-23 17:03:01 -07:00

dcookies.c

consolidate compat lookup_dcookie()

2013-03-03 23:00:23 -05:00

direct-io.c

Merge branch 'for-3.10/core' of git://git.kernel.dk/linux-block

2013-05-08 10:13:35 -07:00

drop_caches.c

…

eventfd.c

fs, eventfd: add procfs fdinfo helper

2012-12-17 17:15:27 -08:00

eventpoll.c

epoll: use freezable blocking call

2013-07-01 15:44:19 -07:00

exec.c

seccomp: implement SECCOMP_FILTER_FLAG_TSYNC

2014-10-07 16:42:34 -07:00

fcntl.c

new helper: file_inode(file)

2013-02-22 23:31:31 -05:00

fhandle.c

Merge branch 'for-3.8' of git://linux-nfs.org/~bfields/linux

2012-12-20 14:04:11 -08:00

file_table.c

fput: task_work_add() can fail if the caller has passed exit_task_work()

2013-06-15 05:39:08 +04:00

file.c

don't bother with deferred freeing of fdtables

2013-05-01 17:31:42 -04:00

filesystems.c

fs: Limit sys_mount to only request filesystem modules.

2013-03-03 19:36:31 -08:00

fs_struct.c

constify path_get/path_put and fs_struct.c stuff

2013-03-01 23:51:07 -05:00

fs-writeback.c

fs: block_dump: Don't display inode changes if block_dump < 2

2013-07-01 13:40:25 -07:00

generic_acl.c

userns: Pass a userns parameter into posix_acl_to_xattr and posix_acl_from_xattr

2012-09-18 01:01:35 -07:00

inode.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2013-05-01 17:51:54 -07:00

internal.h

splice: don't pass the address of ->f_pos to methods

2013-06-20 19:02:45 +04:00

ioctl.c

new helper: file_inode(file)

2013-02-22 23:31:31 -05:00

ioprio.c

Merge branch 'for-3.5/core' of git://git.kernel.dk/linux-block

2012-05-30 08:52:42 -07:00

Kconfig

efivarfs: Move to fs/efivarfs

2013-04-17 13:25:09 +01:00

Kconfig.binfmt

fs: make binfmt support for #! scripts modular and removable

2013-04-30 17:04:04 -07:00

libfs.c

vfs: drop vmtruncate

2012-12-20 18:46:29 -05:00

locks.c

new helper: file_inode(file)

2013-02-22 23:31:31 -05:00

Makefile

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2013-05-01 17:51:54 -07:00

mbcache.c

…

mount.h

get rid of full-hash scan on detaching vfsmounts

2013-04-09 14:12:52 -04:00

mpage.c

fs: reduce the use of module.h wherever possible

2012-02-28 19:31:58 -05:00

namei.c

use can_lookup() instead of direct checks of ->i_op->lookup

2013-06-15 05:41:45 +04:00

namespace.c

create_mnt_ns: unidiomatic use of list_add()

2013-05-04 15:18:53 -04:00

no-block.c

…

open.c

make SYSCALL_DEFINE<n>-generated wrappers do asmlinkage_protect

2013-03-03 22:58:33 -05:00

pipe.c

aio: don't include aio.h in sched.h

2013-05-07 20:16:25 -07:00

pnode.c

vfs: Fix invalid ida_remove() call

2013-05-31 15:16:33 -04:00

pnode.h

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2013-05-01 17:51:54 -07:00

posix_acl.c

userns: Convert vfs posix_acl support to use kuids and kgids

2012-09-18 01:01:35 -07:00

proc_namespace.c

get rid of magic in proc_namespace.c

2012-07-14 16:32:48 +04:00

read_write.c

splice: don't pass the address of ->f_pos to methods

2013-06-20 19:02:45 +04:00

readdir.c

new helper: file_inode(file)

2013-02-22 23:31:31 -05:00

select.c

select: use freezable blocking call

2013-07-01 15:45:28 -07:00

seq_file.c

fs/seq_file: fallback to vmalloc allocation

2014-09-03 12:58:08 -07:00

signalfd.c

switch signalfd{,4}() to COMPAT_SYSCALL_DEFINE

2013-03-03 22:58:46 -05:00

splice.c

fs: fix new splice.c kernel-doc warning

2013-06-23 16:19:56 -10:00

stack.c

fs: reduce the use of module.h wherever possible

2012-02-28 19:31:58 -05:00

stat.c

switch vfs_getattr() to struct path

2013-02-26 02:46:08 -05:00

statfs.c

vfs: fix user_statfs to retry once on ESTALE errors

2012-12-20 18:50:07 -05:00

super.c

hlist: drop the node parameter from iterators

2013-02-27 19:10:24 -08:00

sync.c

teach SYSCALL_DEFINE<n> how to deal with long long/unsigned long long

2013-03-03 22:46:22 -05:00

timerfd.c

timerfd: support CLOCK_BOOTTIME clock

2013-12-13 23:04:58 +00:00

utimes.c

vfs: allow utimensat() calls to retry once on an ESTALE error

2012-12-20 18:50:08 -05:00

xattr_acl.c

userns: Fix posix_acl_file_xattr_userns gid conversion

2012-10-12 13:16:48 -07:00

xattr.c

vfs: make lremovexattr retry once on ESTALE error

2012-12-20 18:50:11 -05:00