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Currently reading a directory is implemented in the client code.
This function is not actually a wire operation, but a meta operation
which calls read operations and processes the results.
This patch moves this functionality to the fs layer and calls component
wire operations instead of constructing their packets. This provides a
cleaner separation and will help when we reorganize the client functions
and protocol processing methods.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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Currently, the 9p net wire operation ensures that all data is sent by sending
multiple packets if the data requested is larger than the msize. This is
better handled in the vfs code so that we can simplify wire operations to
being concerned with only putting data onto and taking data off of the wire.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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There are a couple of methods in the client code which aren't actually
wire operations. To keep things organized cleaner, these operations are
being moved to the fs layer.
This patch moves the readn meta-function (which executes multiple wire
reads until a buffer is full) to the fs layer.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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Currently there are two separate versions of read and write. One for
dealing with user buffers and the other for dealing with kernel buffers.
There is a tremendous amount of code duplication in the otherwise
identical versions of these functions. This patch adds an additional
user buffer parameter to read and write and conditionalizes handling of
the buffer on whether the kernel buffer or the user buffer is populated.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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Right now there is a transport module structure which provides per-transport
type functions and data and a transport structure which contains per-instance
public data as well as function pointers to instance specific functions.
This patch moves public transport visible instance data to the client
structure (which in some cases had duplicate data) and consolidates the
functions into the transport module structure.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
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* git://git.linux-nfs.org/projects/trondmy/nfs-2.6: (53 commits)
NFS: Fix a resolution problem with nfs_inode->cache_change_attribute
NFS: Fix the resolution problem with nfs_inode_attrs_need_update()
NFS: Changes to inode->i_nlinks must set the NFS_INO_INVALID_ATTR flag
RPC/RDMA: ensure connection attempt is complete before signalling.
RPC/RDMA: correct the reconnect timer backoff
RPC/RDMA: optionally emit useful transport info upon connect/disconnect.
RPC/RDMA: reformat a debug printk to keep lines together.
RPC/RDMA: harden connection logic against missing/late rdma_cm upcalls.
RPC/RDMA: fix connect/reconnect resource leak.
RPC/RDMA: return a consistent error, when connect fails.
RPC/RDMA: adhere to protocol for unpadded client trailing write chunks.
RPC/RDMA: avoid an oops due to disconnect racing with async upcalls.
RPC/RDMA: maintain the RPC task bytes-sent statistic.
RPC/RDMA: suppress retransmit on RPC/RDMA clients.
RPC/RDMA: fix connection IRD/ORD setting
RPC/RDMA: support FRMR client memory registration.
RPC/RDMA: check selected memory registration mode at runtime.
RPC/RDMA: add data types and new FRMR memory registration enum.
RPC/RDMA: refactor the inline memory registration code.
NFS: fix nfs_parse_ip_address() corner case
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* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (46 commits)
UIO: Fix mapping of logical and virtual memory
UIO: add automata sercos3 pci card support
UIO: Change driver name of uio_pdrv
UIO: Add alignment warnings for uio-mem
Driver core: add bus_sort_breadthfirst() function
NET: convert the phy_device file to use bus_find_device_by_name
kobject: Cleanup kobject_rename and !CONFIG_SYSFS
kobject: Fix kobject_rename and !CONFIG_SYSFS
sysfs: Make dir and name args to sysfs_notify() const
platform: add new device registration helper
sysfs: use ilookup5() instead of ilookup5_nowait()
PNP: create device attributes via default device attributes
Driver core: make bus_find_device_by_name() more robust
usb: turn dev_warn+WARN_ON combos into dev_WARN
debug: use dev_WARN() rather than WARN_ON() in device_pm_add()
debug: Introduce a dev_WARN() function
sysfs: fix deadlock
device model: Do a quickcheck for driver binding before doing an expensive check
Driver core: Fix cleanup in device_create_vargs().
Driver core: Clarify device cleanup.
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* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
module: remove CONFIG_KMOD in comment after #endif
remove CONFIG_KMOD from fs
remove CONFIG_KMOD from drivers
Manually fix conflict due to include cleanups in drivers/md/md.c
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* 'personality' of git://git390.osdl.marist.edu/pub/scm/linux-2.6:
[PATCH] remove unused ibcs2/PER_SVR4 in SET_PERSONALITY
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This patchs adds the CONFIG_AIO option which allows to remove support
for asynchronous I/O operations, that are not necessarly used by
applications, particularly on embedded devices. As this is a
size-reduction option, it depends on CONFIG_EMBEDDED. It allows to
save ~7 kilobytes of kernel code/data:
text data bss dec hex filename
1115067 119180 217088 1451335 162547 vmlinux
1108025 119048 217088 1444161 160941 vmlinux.new
-7042 -132 0 -7174 -1C06 +/-
This patch has been originally written by Matt Mackall
<mpm@selenic.com>, and is part of the Linux Tiny project.
[randy.dunlap@oracle.com: build fix]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Benjamin LaHaise <bcrl@kvack.org>
Cc: Zach Brown <zach.brown@oracle.com>
Signed-off-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Cannot assume writes will fully complete, so this conversion goes the easy
way and always brings the page uptodate before the write.
[dhowells@redhat.com: style tweaks]
Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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de_thread() checks if the old leader was the ->child_reaper, this is not
possible any longer. With the previous patch ->group_leader itself will
change ->child_reaper on exit.
Henceforth find_new_reaper() is the only function (apart from
initialization) which plays with ->child_reaper.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Acked-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Move it into sysrq.c, along with the rest of the sysrq implementation.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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We currently follow blindly what the partition table lies about the
disk, and let the kernel create block devices which can not be accessed.
Trying to identify the device leads to kernel logs full of:
sdb: rw=0, want=73392, limit=28800
attempt to access beyond end of device
Here is an example of a broken partition table, where sda2 starts
behind the end of the disk, and sdb3 is larger than the entire disk:
Disk /dev/sdb: 14 MB, 14745600 bytes
1 heads, 29 sectors/track, 993 cylinders, total 28800 sectors
Device Boot Start End Blocks Id System
/dev/sdb1 29 7800 3886 83 Linux
/dev/sdb2 37801 45601 3900+ 83 Linux
/dev/sdb3 15602 73402 28900+ 83 Linux
/dev/sdb4 23403 28796 2697 83 Linux
The kernel creates these completely invalid devices, which can not be
accessed, or may lead to other unpredictable failures:
grep . /sys/class/block/sdb*/{start,size}
/sys/class/block/sdb/size:28800
/sys/class/block/sdb1/start:29
/sys/class/block/sdb1/size:7772
/sys/class/block/sdb2/start:37801
/sys/class/block/sdb2/size:7801
/sys/class/block/sdb3/start:15602
/sys/class/block/sdb3/size:57801
/sys/class/block/sdb4/start:23403
/sys/class/block/sdb4/size:5394
With this patch, we ignore partitions which start behind the end of the disk,
and limit partitions to the end of the disk if they pretend to be larger:
grep . /sys/class/block/sdb*/{start,size}
/sys/class/block/sdb/size:28800
/sys/class/block/sdb1/start:29
/sys/class/block/sdb1/size:7772
/sys/class/block/sdb3/start:15602
/sys/class/block/sdb3/size:13198
/sys/class/block/sdb4/start:23403
/sys/class/block/sdb4/size:5394
These warnings are printed to the kernel log:
sdb: p2 ignored, start 37801 is behind the end of the disk
sdb: p3 size 57801 limited to end of disk
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Cc: Herton Ronaldo Krzesinski <herton@mandriva.com.br>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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I missed this when I did the arm26 removal.
Reported-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Don't repeat BINFMT_ELF definition, simply multiply COMPAT and BINFMT_ELF.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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These auxvec entries are the only ones left unhandled out of the current
base implementation. This syncs up binfmt_elf_fdpic with linux/auxvec.h
and current binfmt_elf.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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binfmt_elf_fdpic seems to have grabbed a hard-coded hack from an ancient
version of binfmt_elf in order to try and fix up initial stack alignment
on multi-threaded x86, which while in addition to being unused, was also
pushed down beyond the first set of operations on the stack pointer,
negating the entire purpose.
These days, we have an architecture independent arch_align_stack(), so we
switch to using that instead. Move the initial alignment up before the
initial stores while we're at it.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Commit 483fad1c3fa1060d7e6710e84a065ad514571739 ("ELF loader support for
auxvec base platform string") introduced AT_BASE_PLATFORM, but only
implemented it for binfmt_elf.
Given that AT_VECTOR_SIZE_BASE is unconditionally enlarged for us, and
it's only optionally added in for the platforms that set
ELF_BASE_PLATFORM, wire it up for binfmt_elf_fdpic, too.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Remove CVS keywords that weren't updated for a long time from comments.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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In case of error, the function open_xa_dir returns an ERR pointer, but
never returns a NULL pointer. So a NULL test that comes after an IS_ERR
test should be deleted.
The semantic match that finds this problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@match_bad_null_test@
expression x, E;
statement S1,S2;
@@
x = open_xa_dir(...)
... when != x = E
(
* if (x == NULL && ...) S1 else S2
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* if (x == NULL || ...) S1 else S2
)
// </smpl>
Signed-off-by: Julien Brunel <brunel@diku.dk>
Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: Jeff Mahoney <jeffm@suse.com>
Cc: Jan Kara <jack@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Remove CVS keywords that weren't updated for a long time from comments.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Fix a stack corruption caused by a corrupted hfs filesystem. If the
catalog name length is corrupted the memcpy overwrites the catalog btree
structure. Since the field is limited to HFS_NAMELEN bytes in the
structure and the file format, we throw an error if it is too long.
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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While testing more corrupted images with hfsplus, i came across
one which triggered the following bug:
[15840.675016] BUG: unable to handle kernel paging request at fffffffb
[15840.675016] IP: [<c0116a4f>] kmap+0x15/0x56
[15840.675016] *pde = 00008067 *pte = 00000000
[15840.675016] Oops: 0000 [#1] PREEMPT DEBUG_PAGEALLOC
[15840.675016] Modules linked in:
[15840.675016]
[15840.675016] Pid: 11575, comm: ln Not tainted (2.6.27-rc4-00123-gd3ee1b4-dirty #29)
[15840.675016] EIP: 0060:[<c0116a4f>] EFLAGS: 00010202 CPU: 0
[15840.675016] EIP is at kmap+0x15/0x56
[15840.675016] EAX: 00000246 EBX: fffffffb ECX: 00000000 EDX: cab919c0
[15840.675016] ESI: 000007dd EDI: cab0bcf4 EBP: cab0bc98 ESP: cab0bc94
[15840.675016] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
[15840.675016] Process ln (pid: 11575, ti=cab0b000 task=cab919c0 task.ti=cab0b000)
[15840.675016] Stack: 00000000 cab0bcdc c0231cfb 00000000 cab0bce0 00000800 ca9290c0 fffffffb
[15840.675016] cab145d0 cab919c0 cab15998 22222222 22222222 22222222 00000001 cab15960
[15840.675016] 000007dd cab0bcf4 cab0bd04 c022cb3a cab0bcf4 cab15a6c ca9290c0 00000000
[15840.675016] Call Trace:
[15840.675016] [<c0231cfb>] ? hfsplus_block_allocate+0x6f/0x2d3
[15840.675016] [<c022cb3a>] ? hfsplus_file_extend+0xc4/0x1db
[15840.675016] [<c022ce41>] ? hfsplus_get_block+0x8c/0x19d
[15840.675016] [<c06adde4>] ? sub_preempt_count+0x9d/0xab
[15840.675016] [<c019ece6>] ? __block_prepare_write+0x147/0x311
[15840.675016] [<c0161934>] ? __grab_cache_page+0x52/0x73
[15840.675016] [<c019ef4f>] ? block_write_begin+0x79/0xd5
[15840.675016] [<c022cdb5>] ? hfsplus_get_block+0x0/0x19d
[15840.675016] [<c019f22a>] ? cont_write_begin+0x27f/0x2af
[15840.675016] [<c022cdb5>] ? hfsplus_get_block+0x0/0x19d
[15840.675016] [<c0139ebe>] ? tick_program_event+0x28/0x4c
[15840.675016] [<c013bd35>] ? trace_hardirqs_off+0xb/0xd
[15840.675016] [<c022b723>] ? hfsplus_write_begin+0x2d/0x32
[15840.675016] [<c022cdb5>] ? hfsplus_get_block+0x0/0x19d
[15840.675016] [<c0161988>] ? pagecache_write_begin+0x33/0x107
[15840.675016] [<c01879e5>] ? __page_symlink+0x3c/0xae
[15840.675016] [<c019ad34>] ? __mark_inode_dirty+0x12f/0x137
[15840.675016] [<c0187a70>] ? page_symlink+0x19/0x1e
[15840.675016] [<c022e6eb>] ? hfsplus_symlink+0x41/0xa6
[15840.675016] [<c01886a9>] ? vfs_symlink+0x99/0x101
[15840.675016] [<c018a2f6>] ? sys_symlinkat+0x6b/0xad
[15840.675016] [<c018a348>] ? sys_symlink+0x10/0x12
[15840.675016] [<c01038bd>] ? sysenter_do_call+0x12/0x31
[15840.675016] =======================
[15840.675016] Code: 00 00 75 10 83 3d 88 2f ec c0 02 75 07 89 d0 e8 12 56 05 00 5d c3 55 ba 06 00 00 00 89 e5 53 89 c3 b8 3d eb 7e c0 e8 16 74 00 00 <8b> 03 c1 e8 1e 69 c0 d8 02 00 00 05 b8 69 8e c0 2b 80 c4 02 00
[15840.675016] EIP: [<c0116a4f>] kmap+0x15/0x56 SS:ESP 0068:cab0bc94
[15840.675016] ---[ end trace 4fea40dad6b70e5f ]---
This happens because the return value of read_mapping_page() is passed on
to kmap unchecked. The bug is triggered after the first
read_mapping_page() in hfsplus_block_allocate(), this patch fixes all
three usages in this functions but leaves the ones further down in the
file unchanged.
Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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When an hfsplus image gets corrupted it might happen that the catalog
namelength field gets b0rked. If we mount such an image the memcpy() in
hfsplus_cat_build_key_uni() writes more than the 255 that fit in the name
field. Depending on the size of the overwritten data, we either only get
memory corruption or also trigger an oops like this:
[ 221.628020] BUG: unable to handle kernel paging request at c82b0000
[ 221.629066] IP: [<c022d4b1>] hfsplus_find_cat+0x10d/0x151
[ 221.629066] *pde = 0ea29163 *pte = 082b0160
[ 221.629066] Oops: 0002 [#1] PREEMPT DEBUG_PAGEALLOC
[ 221.629066] Modules linked in:
[ 221.629066]
[ 221.629066] Pid: 4845, comm: mount Not tainted (2.6.27-rc4-00123-gd3ee1b4-dirty #28)
[ 221.629066] EIP: 0060:[<c022d4b1>] EFLAGS: 00010206 CPU: 0
[ 221.629066] EIP is at hfsplus_find_cat+0x10d/0x151
[ 221.629066] EAX: 00000029 EBX: 00016210 ECX: 000042c2 EDX: 00000002
[ 221.629066] ESI: c82d70ca EDI: c82b0000 EBP: c82d1bcc ESP: c82d199c
[ 221.629066] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
[ 221.629066] Process mount (pid: 4845, ti=c82d1000 task=c8224060 task.ti=c82d1000)
[ 221.629066] Stack: c080b3c4 c82aa8f8 c82d19c2 00016210 c080b3be c82d1bd4 c82aa8f0 00000300
[ 221.629066] 01000000 750008b1 74006e00 74006900 65006c00 c82d6400 c013bd35 c8224060
[ 221.629066] 00000036 00000046 c82d19f0 00000082 c8224548 c8224060 00000036 c0d653cc
[ 221.629066] Call Trace:
[ 221.629066] [<c013bd35>] ? trace_hardirqs_off+0xb/0xd
[ 221.629066] [<c013bca3>] ? trace_hardirqs_off_caller+0x14/0x9b
[ 221.629066] [<c013bd35>] ? trace_hardirqs_off+0xb/0xd
[ 221.629066] [<c013bca3>] ? trace_hardirqs_off_caller+0x14/0x9b
[ 221.629066] [<c013bd35>] ? trace_hardirqs_off+0xb/0xd
[ 221.629066] [<c0107aa3>] ? native_sched_clock+0x82/0x96
[ 221.629066] [<c01302d2>] ? __kernel_text_address+0x1b/0x27
[ 221.629066] [<c010487a>] ? dump_trace+0xca/0xd6
[ 221.629066] [<c0109e32>] ? save_stack_address+0x0/0x2c
[ 221.629066] [<c0109eaf>] ? save_stack_trace+0x1c/0x3a
[ 221.629066] [<c013b571>] ? save_trace+0x37/0x8d
[ 221.629066] [<c013b62e>] ? add_lock_to_list+0x67/0x8d
[ 221.629066] [<c013ea1c>] ? validate_chain+0x8a4/0x9f4
[ 221.629066] [<c013553d>] ? down+0xc/0x2f
[ 221.629066] [<c013f1f6>] ? __lock_acquire+0x68a/0x6e0
[ 221.629066] [<c013bd35>] ? trace_hardirqs_off+0xb/0xd
[ 221.629066] [<c013bca3>] ? trace_hardirqs_off_caller+0x14/0x9b
[ 221.629066] [<c013bd35>] ? trace_hardirqs_off+0xb/0xd
[ 221.629066] [<c0107aa3>] ? native_sched_clock+0x82/0x96
[ 221.629066] [<c013da5d>] ? mark_held_locks+0x43/0x5a
[ 221.629066] [<c013dc3a>] ? trace_hardirqs_on+0xb/0xd
[ 221.629066] [<c013dbf4>] ? trace_hardirqs_on_caller+0xf4/0x12f
[ 221.629066] [<c06abec8>] ? _spin_unlock_irqrestore+0x42/0x58
[ 221.629066] [<c013555c>] ? down+0x2b/0x2f
[ 221.629066] [<c022aa68>] ? hfsplus_iget+0xa0/0x154
[ 221.629066] [<c022b0b9>] ? hfsplus_fill_super+0x280/0x447
[ 221.629066] [<c0107aa3>] ? native_sched_clock+0x82/0x96
[ 221.629066] [<c013bca3>] ? trace_hardirqs_off_caller+0x14/0x9b
[ 221.629066] [<c013bca3>] ? trace_hardirqs_off_caller+0x14/0x9b
[ 221.629066] [<c013f1f6>] ? __lock_acquire+0x68a/0x6e0
[ 221.629066] [<c041c9e4>] ? string+0x2b/0x74
[ 221.629066] [<c041cd16>] ? vsnprintf+0x2e9/0x512
[ 221.629066] [<c010487a>] ? dump_trace+0xca/0xd6
[ 221.629066] [<c0109eaf>] ? save_stack_trace+0x1c/0x3a
[ 221.629066] [<c0109eaf>] ? save_stack_trace+0x1c/0x3a
[ 221.629066] [<c013b571>] ? save_trace+0x37/0x8d
[ 221.629066] [<c013b62e>] ? add_lock_to_list+0x67/0x8d
[ 221.629066] [<c013ea1c>] ? validate_chain+0x8a4/0x9f4
[ 221.629066] [<c01354d3>] ? up+0xc/0x2f
[ 221.629066] [<c013f1f6>] ? __lock_acquire+0x68a/0x6e0
[ 221.629066] [<c013bd35>] ? trace_hardirqs_off+0xb/0xd
[ 221.629066] [<c013bca3>] ? trace_hardirqs_off_caller+0x14/0x9b
[ 221.629066] [<c013bd35>] ? trace_hardirqs_off+0xb/0xd
[ 221.629066] [<c0107aa3>] ? native_sched_clock+0x82/0x96
[ 221.629066] [<c041cfb7>] ? snprintf+0x1b/0x1d
[ 221.629066] [<c01ba466>] ? disk_name+0x25/0x67
[ 221.629066] [<c0183960>] ? get_sb_bdev+0xcd/0x10b
[ 221.629066] [<c016ad92>] ? kstrdup+0x2a/0x4c
[ 221.629066] [<c022a7b3>] ? hfsplus_get_sb+0x13/0x15
[ 221.629066] [<c022ae39>] ? hfsplus_fill_super+0x0/0x447
[ 221.629066] [<c0183583>] ? vfs_kern_mount+0x3b/0x76
[ 221.629066] [<c0183602>] ? do_kern_mount+0x32/0xba
[ 221.629066] [<c01960d4>] ? do_new_mount+0x46/0x74
[ 221.629066] [<c0196277>] ? do_mount+0x175/0x193
[ 221.629066] [<c013dbf4>] ? trace_hardirqs_on_caller+0xf4/0x12f
[ 221.629066] [<c01663b2>] ? __get_free_pages+0x1e/0x24
[ 221.629066] [<c06ac07b>] ? lock_kernel+0x19/0x8c
[ 221.629066] [<c01962e6>] ? sys_mount+0x51/0x9b
[ 221.629066] [<c01962f9>] ? sys_mount+0x64/0x9b
[ 221.629066] [<c01038bd>] ? sysenter_do_call+0x12/0x31
[ 221.629066] =======================
[ 221.629066] Code: 89 c2 c1 e2 08 c1 e8 08 09 c2 8b 85 e8 fd ff ff 66 89 50 06 89 c7 53 83 c7 08 56 57 68 c4 b3 80 c0 e8 8c 5c ef ff 89 d9 c1 e9 02 <f3> a5 89 d9 83 e1 03 74 02 f3 a4 83 c3 06 8b 95 e8 fd ff ff 0f
[ 221.629066] EIP: [<c022d4b1>] hfsplus_find_cat+0x10d/0x151 SS:ESP 0068:c82d199c
[ 221.629066] ---[ end trace e417a1d67f0d0066 ]---
Since hfsplus_cat_build_key_uni() returns void and only has one callsite,
the check is performed at the callsite.
Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de>
Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Check whether the file system was to be mounted read only anyway before
warning about changing the mount to read only.
Signed-off-by: Mike Crowe <mac@mcrowe.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Does compile-time byteswapping rather than runtime.
Noticed by sparse:
fs/befs/super.c:29:6: warning: cast to restricted __le32
fs/befs/super.c:29:6: warning: cast from restricted fs32
fs/befs/super.c:31:11: warning: cast to restricted __be32
fs/befs/super.c:31:11: warning: cast from restricted fs32
fs/befs/super.c:31:11: warning: cast to restricted __be32
fs/befs/super.c:31:11: warning: cast from restricted fs32
fs/befs/super.c:31:11: warning: cast to restricted __be32
fs/befs/super.c:31:11: warning: cast from restricted fs32
fs/befs/super.c:31:11: warning: cast to restricted __be32
fs/befs/super.c:31:11: warning: cast from restricted fs32
fs/befs/super.c:31:11: warning: cast to restricted __be32
fs/befs/super.c:31:11: warning: cast from restricted fs32
fs/befs/super.c:31:11: warning: cast to restricted __be32
fs/befs/super.c:31:11: warning: cast from restricted fs32
fs/befs/linuxvfs.c:811:7: warning: cast to restricted __le32
fs/befs/linuxvfs.c:811:7: warning: cast from restricted fs32
fs/befs/linuxvfs.c:812:7: warning: cast to restricted __be32
fs/befs/linuxvfs.c:812:7: warning: cast from restricted fs32
fs/befs/linuxvfs.c:812:7: warning: cast to restricted __be32
fs/befs/linuxvfs.c:812:7: warning: cast from restricted fs32
fs/befs/linuxvfs.c:812:7: warning: cast to restricted __be32
fs/befs/linuxvfs.c:812:7: warning: cast from restricted fs32
fs/befs/linuxvfs.c:812:7: warning: cast to restricted __be32
fs/befs/linuxvfs.c:812:7: warning: cast from restricted fs32
fs/befs/linuxvfs.c:812:7: warning: cast to restricted __be32
fs/befs/linuxvfs.c:812:7: warning: cast from restricted fs32
fs/befs/linuxvfs.c:812:7: warning: cast to restricted __be32
fs/befs/linuxvfs.c:812:7: warning: cast from restricted fs32
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: "Sergey S. Kostyliov" <rathamahata@php4.ru>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
A very large directory with many read failures (either due to storage
problems, or due to invalid size & blocks from corruption) will generate a
printk storm as the filesystem continues to try to read all the blocks.
This flood of messages can tie up the box until it is complete - which may
be a very long time, especially for very large corrupted values.
This is fixed by only reporting the corruption once each time we try to
read the directory.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Eugene Teo <eugeneteo@kernel.sg>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
We could run into ENOSPC error on ext2, even when there is free blocks on
the filesystem.
The problem is triggered in the case the goal block group has 0 free
blocks , and the rest block groups are skipped due to the check of
"free_blocks < windowsz/2". Current code could fall back to non
reservation allocation to prevent early ENOSPC after examing all the block
groups with reservation on , but this code was bypassed if the reservation
window is turned off already, which is true in this case.
This patch fixed two issues:
1) We don't need to turn off block reservation if the goal block group has
0 free blocks left and continue search for the rest of block groups.
Current code the intention is to turn off the block reservation if the
goal allocation group has a few (some) free blocks left (not enough for
make the desired reservation window),to try to allocation in the goal
block group, to get better locality. But if the goal blocks have 0 free
blocks, it should leave the block reservation on, and continues search for
the next block groups,rather than turn off block reservation completely.
2) we don't need to check the window size if the block reservation is off.
The problem was originally found and fixed in ext4.
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Add a miscellaneous device to the autofs4 module for routing ioctls. This
provides the ability to obtain an ioctl file handle for an autofs mount
point that is possibly covered by another mount.
The actual problem with autofs is that it can't reconnect to existing
mounts. Immediately one things of just adding the ability to remount
autofs file systems would solve it, but alas, that can't work. This is
because autofs direct mounts and the implementation of "on demand mount
and expire" of nested mount trees have the file system mounted on top of
the mount trigger dentry.
To resolve this a miscellaneous device node for routing ioctl commands to
these mount points has been implemented in the autofs4 kernel module and a
library added to autofs. This provides the ability to open a file
descriptor for these over mounted autofs mount points.
Please refer to Documentation/filesystems/autofs4-mount-control.txt for a
discussion of the problem, implementation alternatives considered and a
description of the interface.
[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: build fix]
Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Track the uid and gid of the last process to request a mount for on an
autofs dentry.
[akpm@linux-foundation.org: fix tpyo in comment]
Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Usage of the AUTOFS_TYPE_* defines is a little confusing and appears
inconsistent.
Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
The netlink transport code has not worked for a while and the miscdev
transport is a simpler solution. This patch removes the netlink code and
makes the miscdev transport the only eCryptfs kernel to userspace
transport.
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
Cc: Michael Halcrow <mhalcrow@us.ibm.com>
Cc: Dustin Kirkland <kirkland@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Convert ecryptfs to use write_begin/write_end
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Acked-by: Michael Halcrow <mhalcrow@us.ibm.com>
Cc: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
The retry block in ecryptfs_readdir() has been in the eCryptfs code base
for a while, apparently for no good reason. This loop could potentially
run without terminating. This patch removes the loop, instead erroring
out if vfs_readdir() on the lower file fails.
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com>
Reported-by: Al Viro <viro@ZinIV.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
binfmt_script and binfmt_misc disallow recursion to avoid stack overflow
using sh_bang and misc_bang. It causes problem in some cases:
$ echo '#!/bin/ls' > /tmp/t0
$ echo '#!/tmp/t0' > /tmp/t1
$ echo '#!/tmp/t1' > /tmp/t2
$ chmod +x /tmp/t*
$ /tmp/t2
zsh: exec format error: /tmp/t2
Similar problem with binfmt_misc.
This patch introduces field 'recursion_depth' into struct linux_binprm to
track recursion level in binfmt_misc and binfmt_script. If recursion
level more then BINPRM_MAX_RECURSION it generates -ENOEXEC.
[akpm@linux-foundation.org: make linux_binprm.recursion_depth a uint]
Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
This change is Alpha-specific. It adds field 'taso' into struct
linux_binprm to remember if the application is TASO. Previously, field
sh_bang was used for this purpose.
Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Add the missing MODULE_LICENSE("GPL").
Reported-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Cc: Matthew Wilcox <matthew@wil.cx>
Cc: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
struct stat / compat_stat is the same on all architectures, so
cp_compat_stat should be, too.
Turns out it is, except that various architectures have slightly and some
high2lowuid/high2lowgid or the direct assignment instead of the
SET_UID/SET_GID that expands to the correct one anyway.
This patch replaces the arch-specific cp_compat_stat implementations with
a common one based on the x86-64 one.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: David S. Miller <davem@davemloft.net> [ sparc bits ]
Acked-by: Kyle McMartin <kyle@mcmartin.ca> [ parisc bits ]
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
People can use the real name an an index into MAINTAINERS to find the
current email address.
Signed-off-by: Francois Cami <francois.cami@free.fr>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Thomas found that there is an unnecessary (always true) test in
ep_send_events(). The callback never inserts into ->rdllink while the
send loop is performed, and also does the ~EP_PRIVATE_BITS test. Given
we're holding the mutex during this time, the conditions tested inside the
loop are always true. This patch drops the test done inside the
re-insertion loop.
Signed-off-by: Davide Libenzi <davidel@xmailserver.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
With MAX_ARG_STRINGS set to 0x7FFFFFFF, and being passed to 'count()' and
compat_count(), it would appear that the current max bounds check of
fs/exec.c:394:
if(++i > max)
return -E2BIG;
would never trigger. Since 'i' is of type int, so values would wrap and the
function would continue looping.
Simple fix seems to be chaning ++i to i++ and checking for '>='.
Signed-off-by: Jason Baron <jbaron@redhat.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: "Ollie Wild" <aaw@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
There are off-by-one errors in decompress_exec() when calculating the length of
optional "original file name" and "comment" fields: the "ret" index is not
incremented when terminating '\0' character is reached. The check of the buffer
overflow (after an "extra-field" length was taken into account) is also fixed.
I've encountered this off-by-one error when tried to reuse
gzip-header-parsing part of the decompress_exec() function. There was an
"original file name" field in the payload (with miscalculated length) and
zlib_inflate() returned Z_DATA_ERROR. But after the fix similar to this
one all worked fine.
Signed-off-by: Volodymyr G Lukiianyk <volodymyrgl@gmail.com>
Acked-by: Greg Ungerer <gerg@snapgear.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
It finally dawned on me what the clean fix to sysfs_rename_dir
calling kobject_set_name is. Move the work into kobject_rename
where it belongs. The callers serialize us anyway so this is
safe.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
|
|
Because they can be, and because code like this produces a warning if
they're not:
struct device_attribute dev_attr;
sysfs_notify(&kobj, NULL, dev_attr.attr.name);
Signed-off-by: Trent Piepho <tpiepho@freescale.com>
CC: Neil Brown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
|
|
As inode creation is protected by sysfs_mutex, ilookup5_nowait()
always either fails to find at all or finds one which is fully
initialized, so using ilookup5_nowait() or ilookup5() doesn't make any
difference. Switch to ilookup5() as it's planned to be removed. This
change also makes lookup return value handling a bit simpler.
This change was suggested by Al Viro.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Al Viro <viro@hera.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
|
|
On Thu, Sep 11, 2008 at 10:27:10AM +0200, Ingo Molnar wrote:
> and it's working fine on most boxes. One testbox found this new locking
> scenario:
>
> PM: Adding info for No Bus:vcsa7
> EDAC DEBUG: MC0: i82860_check()
>
> =======================================================
> [ INFO: possible circular locking dependency detected ]
> 2.6.27-rc6-tip #1
> -------------------------------------------------------
> X/4873 is trying to acquire lock:
> (&bb->mutex){--..}, at: [<c020ba20>] mmap+0x40/0xa0
>
> but task is already holding lock:
> (&mm->mmap_sem){----}, at: [<c0125a1e>] sys_mmap2+0x8e/0xc0
>
> which lock already depends on the new lock.
>
>
> the existing dependency chain (in reverse order) is:
>
> -> #1 (&mm->mmap_sem){----}:
> [<c017dc96>] validate_chain+0xa96/0xf50
> [<c017ef2b>] __lock_acquire+0x2cb/0x5b0
> [<c017f299>] lock_acquire+0x89/0xc0
> [<c01aa8fb>] might_fault+0x6b/0x90
> [<c040b618>] copy_to_user+0x38/0x60
> [<c020bcfb>] read+0xfb/0x170
> [<c01c09a5>] vfs_read+0x95/0x110
> [<c01c1443>] sys_pread64+0x63/0x80
> [<c012146f>] sysenter_do_call+0x12/0x43
> [<ffffffff>] 0xffffffff
>
> -> #0 (&bb->mutex){--..}:
> [<c017d8b7>] validate_chain+0x6b7/0xf50
> [<c017ef2b>] __lock_acquire+0x2cb/0x5b0
> [<c017f299>] lock_acquire+0x89/0xc0
> [<c0d6f2ab>] __mutex_lock_common+0xab/0x3c0
> [<c0d6f698>] mutex_lock_nested+0x38/0x50
> [<c020ba20>] mmap+0x40/0xa0
> [<c01b111e>] mmap_region+0x14e/0x450
> [<c01b170f>] do_mmap_pgoff+0x2ef/0x310
> [<c0125a3d>] sys_mmap2+0xad/0xc0
> [<c012146f>] sysenter_do_call+0x12/0x43
> [<ffffffff>] 0xffffffff
>
> other info that might help us debug this:
>
> 1 lock held by X/4873:
> #0: (&mm->mmap_sem){----}, at: [<c0125a1e>] sys_mmap2+0x8e/0xc0
>
> stack backtrace:
> Pid: 4873, comm: X Not tainted 2.6.27-rc6-tip #1
> [<c017cd09>] print_circular_bug_tail+0x79/0xc0
> [<c017d8b7>] validate_chain+0x6b7/0xf50
> [<c017a5b5>] ? trace_hardirqs_off_caller+0x15/0xb0
> [<c017ef2b>] __lock_acquire+0x2cb/0x5b0
> [<c017f299>] lock_acquire+0x89/0xc0
> [<c020ba20>] ? mmap+0x40/0xa0
> [<c0d6f2ab>] __mutex_lock_common+0xab/0x3c0
> [<c020ba20>] ? mmap+0x40/0xa0
> [<c0d6f698>] mutex_lock_nested+0x38/0x50
> [<c020ba20>] ? mmap+0x40/0xa0
> [<c020ba20>] mmap+0x40/0xa0
> [<c01b111e>] mmap_region+0x14e/0x450
> [<c01afb88>] ? arch_get_unmapped_area_topdown+0xf8/0x160
> [<c01b170f>] do_mmap_pgoff+0x2ef/0x310
> [<c0125a3d>] sys_mmap2+0xad/0xc0
> [<c012146f>] sysenter_do_call+0x12/0x43
> [<c0120000>] ? __switch_to+0x130/0x220
> =======================
> evbug.c: Event. Dev: input3, Type: 20, Code: 0, Value: 500
> warning: `sudo' uses deprecated v2 capabilities in a way that may be insecure.
>
> i've attached the config.
>
> at first sight it looks like a genuine bug in fs/sysfs/bin.c?
Yes, it is a real bug by the looks. bin.c takes bb->mutex under mmap_sem
when it is mmapped, and then does its copy_*_user under bb->mutex too.
Here is a basic fix for the sysfs lor.
From: Nick Piggin <npiggin@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
|
|
Support sysfs_notify from atomic context with new sysfs_notify_dirent
sysfs_notify currently takes sysfs_mutex.
This means that it cannot be called in atomic context.
sysfs_mutex is sometimes held over a malloc (sysfs_rename_dir)
so it can block on low memory.
In md I want to be able to notify on a sysfs attribute from
atomic context, and I don't want to block on low memory because I
could be in the writeout path for freeing memory.
So:
- export the "sysfs_dirent" structure along with sysfs_get, sysfs_put
and sysfs_get_dirent so I can get the sysfs_dirent that I want to
notify on and hold it in an md structure.
- split sysfs_notify_dirent out of sysfs_notify so the sysfs_dirent
can be notified on with no blocking (just a spinlock).
Signed-off-by: Neil Brown <neilb@suse.de>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
|
|
Now that device_create() has been audited, rename things back to the
original call to be sane.
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
|
|
Print the name of the last-accessed sysfs file when we oops, to help track
down oopses which occur in sysfs store/read handlers. Because these oopses
tend to not leave any trace of the offending code in the stack traces.
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
|
