17 May, 2016
1 commit
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Fault handlers currently take complete_unwritten argument to convert
unwritten extents after PTEs are updated. However no filesystem uses
this anymore as the code is racy. Remove the unused argument.Reviewed-by: Ross Zwisler
Signed-off-by: Jan Kara
Signed-off-by: Vishal Verma
28 Feb, 2016
1 commit
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As it is currently written ext4_dax_mkwrite() assumes that the call into
__dax_mkwrite() will not have to do a block allocation so it doesn't create
a journal entry. For a read that creates a zero page to cover a hole
followed by a write that actually allocates storage this is incorrect. The
ext4_dax_mkwrite() -> __dax_mkwrite() -> __dax_fault() path calls
get_blocks() to allocate storage.Fix this by having the ->page_mkwrite fault handler call ext4_dax_fault()
as this function already has all the logic needed to allocate a journal
entry and call __dax_fault().Also update the ext2 fault handlers in this same way to remove duplicate
code and keep the logic between ext2 and ext4 the same.Reviewed-by: Jan Kara
Signed-off-by: Ross Zwisler
Signed-off-by: Theodore Ts'o
23 Jan, 2016
1 commit
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To properly support the new DAX fsync/msync infrastructure filesystems
need to call dax_pfn_mkwrite() so that DAX can track when user pages are
dirtied.Signed-off-by: Ross Zwisler
Cc: "H. Peter Anvin"
Cc: "J. Bruce Fields"
Cc: "Theodore Ts'o"
Cc: Alexander Viro
Cc: Andreas Dilger
Cc: Dave Chinner
Cc: Ingo Molnar
Cc: Jan Kara
Cc: Jeff Layton
Cc: Matthew Wilcox
Cc: Thomas Gleixner
Cc: Dan Williams
Cc: Matthew Wilcox
Cc: Dave Hansen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
19 Oct, 2015
1 commit
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Add locking to ensure that DAX faults are isolated from ext2 operations
that modify the data blocks allocation for an inode. This is intended to
be analogous to the work being done in XFS by Dave Chinner:http://www.spinics.net/lists/linux-fsdevel/msg90260.html
Compared with XFS the ext2 case is greatly simplified by the fact that ext2
already allocates and zeros new blocks before they are returned as part of
ext2_get_block(), so DAX doesn't need to worry about getting unmapped or
unwritten buffer heads.This means that the only work we need to do in ext2 is to isolate the DAX
faults from inode block allocation changes. I believe this just means that
we need to isolate the DAX faults from truncate operations.The newly introduced dax_sem is intended to replicate the protection
offered by i_mmaplock in XFS. In addition to truncate the i_mmaplock also
protects XFS operations like hole punching, fallocate down, extent
manipulation IOCTLS like xfs_ioc_space() and extent swapping. Truncate is
the only one of these operations supported by ext2.Signed-off-by: Ross Zwisler
Signed-off-by: Jan Kara
09 Sep, 2015
2 commits
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Use DAX to provide support for huge pages.
Signed-off-by: Matthew Wilcox
Cc: Hillf Danton
Cc: "Kirill A. Shutemov"
Cc: Theodore Ts'o
Cc: Jan Kara
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
In order to handle the !CONFIG_TRANSPARENT_HUGEPAGES case, we need to
return VM_FAULT_FALLBACK from the inlined dax_pmd_fault(), which is
defined in linux/mm.h. Given that we don't want to include
in , the easiest solution is to move the DAX-related
functions to a new header, . We could also have moved
VM_FAULT_* definitions to a new header, or a different header that isn't
quite such a boil-the-ocean header as , but this felt like
the best option.Signed-off-by: Matthew Wilcox
Cc: Hillf Danton
Cc: "Kirill A. Shutemov"
Cc: Theodore Ts'o
Cc: Jan Kara
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
04 Jun, 2015
1 commit
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dax_fault() currently relies on the get_block callback to attach an
io completion callback to the mapping buffer head so that it can
run unwritten extent conversion after zeroing allocated blocks.Instead of this hack, pass the conversion callback directly into
dax_fault() similar to the get_block callback. When the filesystem
allocates unwritten extents, it will set the buffer_unwritten()
flag, and hence the dax_fault code can call the completion function
in the contexts where it is necessary without overloading the
mapping buffer head.Note: The changes to ext4 to use this interface are suspect at best.
In fact, the way ext4 did this end_io assignment in the first place
looks suspect because it only set a completion callback when there
wasn't already some other write() call taking place on the same
inode. The ext4 end_io code looks rather intricate and fragile with
all it's reference counting and passing to different contexts for
modification via inode private pointers that aren't protected by
locks...Signed-off-by: Dave Chinner
Acked-by: Jan Kara
Signed-off-by: Dave Chinner
16 Apr, 2015
3 commits
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Merge second patchbomb from Andrew Morton:
- the rest of MM
- various misc bits
- add ability to run /sbin/reboot at reboot time
- printk/vsprintf changes
- fiddle with seq_printf() return value
* akpm: (114 commits)
parisc: remove use of seq_printf return value
lru_cache: remove use of seq_printf return value
tracing: remove use of seq_printf return value
cgroup: remove use of seq_printf return value
proc: remove use of seq_printf return value
s390: remove use of seq_printf return value
cris fasttimer: remove use of seq_printf return value
cris: remove use of seq_printf return value
openrisc: remove use of seq_printf return value
ARM: plat-pxa: remove use of seq_printf return value
nios2: cpuinfo: remove use of seq_printf return value
microblaze: mb: remove use of seq_printf return value
ipc: remove use of seq_printf return value
rtc: remove use of seq_printf return value
power: wakeup: remove use of seq_printf return value
x86: mtrr: if: remove use of seq_printf return value
linux/bitmap.h: improve BITMAP_{LAST,FIRST}_WORD_MASK
MAINTAINERS: CREDITS: remove Stefano Brivio from B43
.mailmap: add Ricardo Ribalda
CREDITS: add Ricardo Ribalda Delgado
... -
The original dax patchset split the ext2/4_file_operations because of the
two NULL splice_read/splice_write in the dax case.In the vfs if splice_read/splice_write are NULL we then call
default_splice_read/write.What we do here is make generic_file_splice_read aware of IS_DAX() so the
original ext2/4_file_operations can be used as is.For write it appears that iter_file_splice_write is just fine. It uses
the regular f_op->write(file,..) or new_sync_write(file, ...).Signed-off-by: Boaz Harrosh
Reviewed-by: Jan Kara
Cc: Dave Chinner
Cc: Matthew Wilcox
Cc: Hugh Dickins
Cc: Mel Gorman
Cc: Kirill A. Shutemov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
From: Yigal Korman
[v1]
Without this patch, c/mtime is not updated correctly when mmap'ed page is
first read from and then written to.A new xfstest is submitted for testing this (generic/080)
[v2]
Jan Kara has pointed out that if we add the
sb_start/end_pagefault pair in the new pfn_mkwrite we
are then fixing another bug where: A user could start
writing to the page while filesystem is frozen.Signed-off-by: Yigal Korman
Signed-off-by: Boaz Harrosh
Reviewed-by: Jan Kara
Cc: Matthew Wilcox
Cc: Dave Chinner
Cc: Hugh Dickins
Cc: Mel Gorman
Cc: Kirill A. Shutemov
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
12 Apr, 2015
1 commit
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All places outside of core VFS that checked ->read and ->write for being NULL or
called the methods directly are gone now, so NULL {read,write} with non-NULL
{read,write}_iter will do the right thing in all cases.Signed-off-by: Al Viro
17 Feb, 2015
4 commits
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To help people transition, accept the 'xip' mount option (and report it in
/proc/mounts), but print a message encouraging people to switch over to
the 'dax' option.Signed-off-by: Matthew Wilcox
Reviewed-by: Mathieu Desnoyers
Cc: Andreas Dilger
Cc: Boaz Harrosh
Cc: Christoph Hellwig
Cc: Dave Chinner
Cc: Jan Kara
Cc: Jens Axboe
Cc: Kirill A. Shutemov
Cc: Randy Dunlap
Cc: Ross Zwisler
Cc: Theodore Ts'o
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The fewer Kconfig options we have the better. Use the generic
CONFIG_FS_DAX to enable XIP support in ext2 as well as in the core.Signed-off-by: Matthew Wilcox
Cc: Andreas Dilger
Cc: Boaz Harrosh
Cc: Christoph Hellwig
Cc: Dave Chinner
Cc: Jan Kara
Cc: Jens Axboe
Cc: Kirill A. Shutemov
Cc: Mathieu Desnoyers
Cc: Randy Dunlap
Cc: Ross Zwisler
Cc: Theodore Ts'o
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Instead of calling aops->get_xip_mem from the fault handler, the
filesystem passes a get_block_t that is used to find the appropriate
blocks.This requires that all architectures implement copy_user_page(). At the
time of writing, mips and arm do not. Patches exist and are in progress.[akpm@linux-foundation.org: remap_file_pages went away]
Signed-off-by: Matthew Wilcox
Reviewed-by: Jan Kara
Cc: Andreas Dilger
Cc: Boaz Harrosh
Cc: Christoph Hellwig
Cc: Dave Chinner
Cc: Jens Axboe
Cc: Kirill A. Shutemov
Cc: Mathieu Desnoyers
Cc: Randy Dunlap
Cc: Ross Zwisler
Cc: Theodore Ts'o
Cc: Russell King
Cc: Ralf Baechle
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Use the generic AIO infrastructure instead of custom read and write
methods. In addition to giving us support for AIO, this adds the missing
locking between read() and truncate().Signed-off-by: Matthew Wilcox
Reviewed-by: Ross Zwisler
Reviewed-by: Jan Kara
Cc: Andreas Dilger
Cc: Boaz Harrosh
Cc: Christoph Hellwig
Cc: Dave Chinner
Cc: Jens Axboe
Cc: Kirill A. Shutemov
Cc: Mathieu Desnoyers
Cc: Randy Dunlap
Cc: Theodore Ts'o
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
12 Jun, 2014
1 commit
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iter_file_splice_write() - a ->splice_write() instance that gathers the
pipe buffers, builds a bio_vec-based iov_iter covering those and feeds
it to ->write_iter(). A bunch of simple cases coverted to that...[AV: fixed the braino spotted by Cyrill]
Signed-off-by: Al Viro
07 May, 2014
2 commits
-
Signed-off-by: Al Viro
-
Signed-off-by: Al Viro
26 Jan, 2014
1 commit
-
Signed-off-by: Christoph Hellwig
Reviewed-by: Jan Kara
Signed-off-by: Al Viro
26 Jul, 2011
1 commit
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Replace the ->check_acl method with a ->get_acl method that simply reads an
ACL from disk after having a cache miss. This means we can replace the ACL
checking boilerplate code with a single implementation in namei.c.Signed-off-by: Christoph Hellwig
Signed-off-by: Al Viro
21 Jul, 2011
1 commit
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Btrfs needs to be able to control how filemap_write_and_wait_range() is called
in fsync to make it less of a painful operation, so push down taking i_mutex and
the calling of filemap_write_and_wait() down into the ->fsync() handlers. Some
file systems can drop taking the i_mutex altogether it seems, like ext3 and
ocfs2. For correctness sake I just pushed everything down in all cases to make
sure that we keep the current behavior the same for everybody, and then each
individual fs maintainer can make up their mind about what to do from there.
Thanks,Acked-by: Jan Kara
Signed-off-by: Josef Bacik
Signed-off-by: Al Viro
28 May, 2010
3 commits
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I also have commented a possible bug in existing ext2 code, marked with XXX.
Cc: linux-ext4@vger.kernel.org
Cc: Christoph Hellwig
Signed-off-by: Nick Piggin
Signed-off-by: Al Viro -
We don't name our generic fsync implementations very well currently.
The no-op implementation for in-memory filesystems currently is called
simple_sync_file which doesn't make too much sense to start with,
the the generic one for simple filesystems is called simple_fsync
which can lead to some confusion.This patch renames the generic file fsync method to generic_file_fsync
to match the other generic_file_* routines it is supposed to be used
with, and the no-op implementation to noop_fsync to make it obvious
what to expect. In addition add some documentation for both methods.Signed-off-by: Christoph Hellwig
Signed-off-by: Al Viro -
Signed-off-by: Christoph Hellwig
Signed-off-by: Al Viro
05 Mar, 2010
2 commits
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Get rid of the initialize dquot operation - it is now always called from
the filesystem and if a filesystem really needs it's own (which none
currently does) it can just call into it's own routine directly.Rename the now static low-level dquot_initialize helper to __dquot_initialize
and vfs_dq_init to dquot_initialize to have a consistent namespace.Signed-off-by: Christoph Hellwig
Signed-off-by: Jan Kara -
Currently various places in the VFS call vfs_dq_init directly. This means
we tie the quota code into the VFS. Get rid of that and make the
filesystem responsible for the initialization. For most metadata operations
this is a straight forward move into the methods, but for truncate and
open it's a bit more complicated.For truncate we currently only call vfs_dq_init for the sys_truncate case
because open already takes care of it for ftruncate and open(O_TRUNC) - the
new code causes an additional vfs_dq_init for those which is harmless.For open the initialization is moved from do_filp_open into the open method,
which means it happens slightly earlier now, and only for regular files.
The latter is fine because we don't need to initialize it for operations
on special files, and we already do it as part of the namespace operations
for directories.Add a dquot_file_open helper that filesystems that support generic quotas
can use to fill in ->open.Signed-off-by: Christoph Hellwig
Signed-off-by: Jan Kara
16 Dec, 2009
1 commit
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When an IO error happens while writing metadata buffers, we should better
report it and call ext2_error since the filesystem is probably no longer
consistent. Sometimes such IO errors happen while flushing thread does
background writeback, the buffer gets later evicted from memory, and thus
the only trace of the error remains as AS_EIO bit set in blockdevice's
mapping. So we check this bit in ext2_fsync and report the error although
we cannot be really sure which buffer we failed to write.Signed-off-by: Jan Kara
Cc: Chris Mason
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 Sep, 2009
1 commit
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Don't implement per-filesystem 'extX_permission()' functions that have
to be called for every path component operation, and instead just expose
the actual ACL checking so that the VFS layer can now do it for us.Reviewed-by: James Morris
Acked-by: Serge Hallyn
Signed-off-by: Linus Torvalds
12 Jun, 2009
1 commit
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kill ext2_sync_file() (along with ext2/fsync.c), get rid of
ext2_update_inode() - it's an alias of ext2_write_inode().Signed-off-by: Al Viro
04 Oct, 2008
1 commit
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Any block based fs (this patch includes ext3) just has to declare its own
fiemap() function and then call this generic function with its own
get_block_t. This works well for block based filesystems that will map
multiple contiguous blocks at one time, but will work for filesystems that
only map one block at a time, you will just end up with an "extent" for each
block. One gotcha is this will not play nicely where there is hole+data
after the EOF. This function will assume its hit the end of the data as soon
as it hits a hole after the EOF, so if there is any data past that it will
not pick that up. AFAIK no block based fs does this anyway, but its in the
comments of the function anyway just in case.Signed-off-by: Josef Bacik
Signed-off-by: Mark Fasheh
Signed-off-by: "Theodore Ts'o"
Cc: linux-fsdevel@vger.kernel.org
07 Feb, 2008
1 commit
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I checked ext2_ioctl and could not find anything in there that would need the
BKL. So convert it over to use unlocked_ioctlSigned-off-by: Andi Kleen
Cc: Theodore Ts'o
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Oct, 2007
1 commit
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Val's cross-port of the ext3 reservations code into ext2.
[mbligh@mbligh.org: Small type error for printk
[akpm@linux-foundation.org: fix types, sync with ext3]
[mbligh@mbligh.org: Bring ext2 reservations code in line with latest ext3]
[akpm@linux-foundation.org: kill noisy printk]
[akpm@linux-foundation.org: remember to dirty the gdp's block]
[akpm@linux-foundation.org: cross-port the missed 5dea5176e5c32ef9f0d1a41d28427b3bf6881b3a]
[akpm@linux-foundation.org: cross-port e6022603b9aa7d61d20b392e69edcdbbc1789969]
[akpm@linux-foundation.org: Port the omitted 08fb306fe63d98eb86e3b16f4cc21816fa47f18e]
[akpm@linux-foundation.org: Backport the missed 20acaa18d0c002fec180956f87adeb3f11f635a6]
[akpm@linux-foundation.org: fixes]
[cmm@us.ibm.com: fix reservation extension]
[bunk@stusta.de: make ext2_get_blocks() static]
[hugh@veritas.com: fix hang]
[hugh@veritas.com: ext2_new_blocks should reset the reservation window size]
[hugh@veritas.com: ext2 balloc: fix off-by-one against rsv_end]
[hugh@veritas.com: grp_goal 0 is a genuine goal (unlike -1), so ext2_try_to_allocate_with_rsv should treat it as such]
[hugh@veritas.com: rbtree usage cleanup]
[pbadari@us.ibm.com: Fix for ext2 reservation]
[bunk@kernel.org: remove fs/ext2/balloc.c:reserve_blocks()]
[hugh@veritas.com: ext2 balloc: use io_error label]
Cc: "Martin J. Bligh"
Cc: Valerie Henson
Cc: Mingming Cao
Cc: Mel Gorman
Cc: Hugh Dickins
Signed-off-by: Adrian Bunk
Signed-off-by: Hugh Dickins
Signed-off-by: Badari Pulavarty
Signed-off-by: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Jul, 2007
1 commit
-
Signed-off-by: Jan Kara
Acked-by: "Theodore Ts'o"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
10 Jul, 2007
2 commits
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This patch removes xip_file_sendfile, the sendfile implementation for
xip without replacement. Those customers that use xip on s390 are not
using sendfile() as far as we know, and so far s390 is the only platform
this could potentially be used on so far.
Having sendfile is not a popular feature for execute in place file
systems, however we have a working implementation of splice_read() based
on fs/splice.c if anyone asks for it.
At this point in time, it does not seem preferable to merge
splice_read() for xip because it causes extra maintenence effort due to
code duplication and it requires struct page behind the xip memory
segment. We'd like to get rid of that in favor of supporting flash based
embedded platforms (Monta Vista work) soon.Signed-off-by: Carsten Otte
Signed-off-by: Jens Axboe -
They can use generic_file_splice_read() instead. Since sys_sendfile() now
prefers that, there should be no change in behaviour.Signed-off-by: Jens Axboe
13 Feb, 2007
1 commit
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Many struct inode_operations in the kernel can be "const". Marking them const
moves these to the .rodata section, which avoids false sharing with potential
dirty data. In addition it'll catch accidental writes at compile time to
these shared resources.Signed-off-by: Arjan van de Ven
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
01 Oct, 2006
3 commits
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This patch cleans up generic_file_*_read/write() interfaces. Christoph
Hellwig gave me the idea for this clean ups.In a nutshell, all filesystems should set .aio_read/.aio_write methods and use
do_sync_read/ do_sync_write() as their .read/.write methods. This allows us
to cleanup all variants of generic_file_* routines.Final available interfaces:
generic_file_aio_read() - read handler
generic_file_aio_write() - write handler
generic_file_aio_write_nolock() - no lock write handler__generic_file_aio_write_nolock() - internal worker routine
Signed-off-by: Badari Pulavarty
Signed-off-by: Christoph Hellwig
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch removes readv() and writev() methods and replaces them with
aio_read()/aio_write() methods.Signed-off-by: Badari Pulavarty
Signed-off-by: Christoph Hellwig
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Move the Ext2 device ioctl compat stuff from fs/compat_ioctl.c to the Ext2
driver so that the Ext2 header file doesn't need to be included.Signed-Off-By: David Howells
Signed-off-by: Jens Axboe
31 Mar, 2006
1 commit
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This adds support for the sys_splice system call. Using a pipe as a
transport, it can connect to files or sockets (latter as output only).From the splice.c comments:
"splice": joining two ropes together by interweaving their strands.
This is the "extended pipe" functionality, where a pipe is used as
an arbitrary in-memory buffer. Think of a pipe as a small kernel
buffer that you can use to transfer data from one end to the other.The traditional unix read/write is extended with a "splice()" operation
that transfers data buffers to or from a pipe buffer.Named by Larry McVoy, original implementation from Linus, extended by
Jens to support splicing to files and fixing the initial implementation
bugs.Signed-off-by: Jens Axboe
Signed-off-by: Linus Torvalds
