08 Jun, 2016
1 commit
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This patch converts the simple bi_rw use cases in the block,
drivers, mm and fs code to set/get the bio operation using
bio_set_op_attrs/bio_opThese should be simple one or two liner cases, so I just did them
in one patch. The next patches handle the more complicated
cases in a module per patch.Signed-off-by: Mike Christie
Reviewed-by: Hannes Reinecke
Signed-off-by: Jens Axboe
18 May, 2016
2 commits
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Pull trivial tree updates from Jiri Kosina.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (21 commits)
gitignore: fix wording
mfd: ab8500-debugfs: fix "between" in printk
memstick: trivial fix of spelling mistake on management
cpupowerutils: bench: fix "average"
treewide: Fix typos in printk
IB/mlx4: printk fix
pinctrl: sirf/atlas7: fix printk spelling
serial: mctrl_gpio: Grammar s/lines GPIOs/line GPIOs/, /sets/set/
w1: comment spelling s/minmum/minimum/
Blackfin: comment spelling s/divsor/divisor/
metag: Fix misspellings in comments.
ia64: Fix misspellings in comments.
hexagon: Fix misspellings in comments.
tools/perf: Fix misspellings in comments.
cris: Fix misspellings in comments.
c6x: Fix misspellings in comments.
blackfin: Fix misspelling of 'register' in comment.
avr32: Fix misspelling of 'definitions' in comment.
treewide: Fix typos in printk
Doc: treewide : Fix typos in DocBook/filesystem.xml
... -
Pull vfs cleanups from Al Viro:
"More cleanups from Christoph"* 'work.preadv2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
nfsd: use RWF_SYNC
fs: add RWF_DSYNC aand RWF_SYNC
ceph: use generic_write_sync
fs: simplify the generic_write_sync prototype
fs: add IOCB_SYNC and IOCB_DSYNC
direct-io: remove the offset argument to dio_complete
direct-io: eliminate the offset argument to ->direct_IO
xfs: eliminate the pos variable in xfs_file_dio_aio_write
filemap: remove the pos argument to generic_file_direct_write
filemap: remove pos variables in generic_file_read_iter
09 May, 2016
1 commit
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Signed-off-by: Al Viro
03 May, 2016
2 commits
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Right now ext2_get_page() (and its analogues in a bunch of other filesystems)
relies upon the directory being locked - the way it sets and tests Checked and
Error bits would be racy without that. Switch to a slightly different scheme,
_not_ setting Checked in case of failure. That way the logics becomes
if Checked => OK
else if Error => fail
else if !validate => fail
else => OK
with validation setting Checked or Error on success and failure resp. and
returning which one had happened. Equivalent to the current logics, but unlike
the current logics not sensitive to the order of set_bit, test_bit getting
reordered by CPU, etc.Signed-off-by: Al Viro
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The rest of work.xattr stuff isn't needed for this branch
02 May, 2016
1 commit
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Including blkdev_direct_IO and dax_do_io. It has to be ki_pos to actually
work, so eliminate the superflous argument.Signed-off-by: Christoph Hellwig
Signed-off-by: Al Viro
18 Apr, 2016
1 commit
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This patch fix spelling typos found in printk
within various part of the kernel sources.Signed-off-by: Masanari Iida
Acked-by: Randy Dunlap
Signed-off-by: Jiri Kosina
11 Apr, 2016
1 commit
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... and neither can ever be NULL
Signed-off-by: Al Viro
05 Apr, 2016
1 commit
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PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time
ago with promise that one day it will be possible to implement page
cache with bigger chunks than PAGE_SIZE.This promise never materialized. And unlikely will.
We have many places where PAGE_CACHE_SIZE assumed to be equal to
PAGE_SIZE. And it's constant source of confusion on whether
PAGE_CACHE_* or PAGE_* constant should be used in a particular case,
especially on the border between fs and mm.Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much
breakage to be doable.Let's stop pretending that pages in page cache are special. They are
not.The changes are pretty straight-forward:
- << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> ;
- >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> ;
- PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN};
- page_cache_get() -> get_page();
- page_cache_release() -> put_page();
This patch contains automated changes generated with coccinelle using
script below. For some reason, coccinelle doesn't patch header files.
I've called spatch for them manually.The only adjustment after coccinelle is revert of changes to
PAGE_CAHCE_ALIGN definition: we are going to drop it later.There are few places in the code where coccinelle didn't reach. I'll
fix them manually in a separate patch. Comments and documentation also
will be addressed with the separate patch.virtual patch
@@
expression E;
@@
- E << (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E@@
expression E;
@@
- E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT)
+ E@@
@@
- PAGE_CACHE_SHIFT
+ PAGE_SHIFT@@
@@
- PAGE_CACHE_SIZE
+ PAGE_SIZE@@
@@
- PAGE_CACHE_MASK
+ PAGE_MASK@@
expression E;
@@
- PAGE_CACHE_ALIGN(E)
+ PAGE_ALIGN(E)@@
expression E;
@@
- page_cache_get(E)
+ get_page(E)@@
expression E;
@@
- page_cache_release(E)
+ put_page(E)Signed-off-by: Kirill A. Shutemov
Acked-by: Michal Hocko
Signed-off-by: Linus Torvalds
23 Jan, 2016
1 commit
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parallel to mutex_{lock,unlock,trylock,is_locked,lock_nested},
inode_foo(inode) being mutex_foo(&inode->i_mutex).Please, use those for access to ->i_mutex; over the coming cycle
->i_mutex will become rwsem, with ->lookup() done with it held
only shared.Signed-off-by: Al Viro
15 Jan, 2016
1 commit
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Mark those kmem allocations that are known to be easily triggered from
userspace as __GFP_ACCOUNT/SLAB_ACCOUNT, which makes them accounted to
memcg. For the list, see below:- threadinfo
- task_struct
- task_delay_info
- pid
- cred
- mm_struct
- vm_area_struct and vm_region (nommu)
- anon_vma and anon_vma_chain
- signal_struct
- sighand_struct
- fs_struct
- files_struct
- fdtable and fdtable->full_fds_bits
- dentry and external_name
- inode for all filesystems. This is the most tedious part, because
most filesystems overwrite the alloc_inode method.The list is far from complete, so feel free to add more objects.
Nevertheless, it should be close to "account everything" approach and
keep most workloads within bounds. Malevolent users will be able to
breach the limit, but this was possible even with the former "account
everything" approach (simply because it did not account everything in
fact).[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Vladimir Davydov
Acked-by: Johannes Weiner
Acked-by: Michal Hocko
Cc: Tejun Heo
Cc: Greg Thelen
Cc: Christoph Lameter
Cc: Pekka Enberg
Cc: David Rientjes
Cc: Joonsoo Kim
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
12 Jan, 2016
1 commit
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Pull vfs RCU symlink updates from Al Viro:
"Replacement of ->follow_link/->put_link, allowing to stay in RCU mode
even if the symlink is not an embedded one.No changes since the mailbomb on Jan 1"
* 'work.symlinks' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
switch ->get_link() to delayed_call, kill ->put_link()
kill free_page_put_link()
teach nfs_get_link() to work in RCU mode
teach proc_self_get_link()/proc_thread_self_get_link() to work in RCU mode
teach shmem_get_link() to work in RCU mode
teach page_get_link() to work in RCU mode
replace ->follow_link() with new method that could stay in RCU mode
don't put symlink bodies in pagecache into highmem
namei: page_getlink() and page_follow_link_light() are the same thing
ufs: get rid of ->setattr() for symlinks
udf: don't duplicate page_symlink_inode_operations
logfs: don't duplicate page_symlink_inode_operations
switch befs long symlinks to page_symlink_operations
13 Dec, 2015
1 commit
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Commit 42cb14b110a5 ("mm: migrate dirty page without
clear_page_dirty_for_io etc") simplified the migration of a PageDirty
pagecache page: one stat needs moving from zone to zone and that's about
all.It's convenient and safest for it to shift the PageDirty bit from old
page to new, just before updating the zone stats: before copying data
and marking the new PageUptodate. This is all done while both pages are
isolated and locked, just as before; and just as before, there's a
moment when the new page is visible in the radix_tree, but not yet
PageUptodate. What's new is that it may now be briefly visible as
PageDirty before it is PageUptodate.When I scoured the tree to see if this could cause a problem anywhere,
the only places I found were in two similar functions __r4w_get_page():
which look up a page with find_get_page() (not using page lock), then
claim it's uptodate if it's PageDirty or PageWriteback or PageUptodate.I'm not sure whether that was right before, but now it might be wrong
(on rare occasions): only claim the page is uptodate if PageUptodate.
Or perhaps the page in question could never be migratable anyway?Signed-off-by: Hugh Dickins
Tested-by: Boaz Harrosh
Cc: Benny Halevy
Cc: Trond Myklebust
Cc: Christoph Lameter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 Dec, 2015
1 commit
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kmap() in page_follow_link_light() needed to go - allowing to hold
an arbitrary number of kmaps for long is a great way to deadlocking
the system.new helper (inode_nohighmem(inode)) needs to be used for pagecache
symlinks inodes; done for all in-tree cases. page_follow_link_light()
instrumented to yell about anything missed.Signed-off-by: Al Viro
10 Nov, 2015
1 commit
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new_valid_dev() always returns 1, so the !new_valid_dev() check is not
needed. Remove it.Signed-off-by: Yaowei Bai
Cc: Alexander Viro
Acked-by: Boaz Harrosh
Cc: Benny Halevy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
24 Jun, 2015
1 commit
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That function was declared in a lot of filesystems to calculate
directory pages.Signed-off-by: Fabian Frederick
Signed-off-by: Al Viro
11 May, 2015
1 commit
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ACK-by: Boaz Harrosh
Signed-off-by: Al Viro
16 Apr, 2015
1 commit
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that's the bulk of filesystem drivers dealing with inodes of their own
Signed-off-by: David Howells
Signed-off-by: Al Viro
12 Apr, 2015
2 commits
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Now that no one is using rw, remove it completely.
Signed-off-by: Omar Sandoval
Signed-off-by: Al Viro -
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
1 commit
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All callers of get_xip_mem() are now gone. Remove checks for it,
initialisers of it, documentation of it and the only implementation of it.
Also remove mm/filemap_xip.c as it is now empty. Also remove
documentation of the long-gone get_xip_page().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
21 Jan, 2015
2 commits
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Now that we never use the backing_dev_info pointer in struct address_space
we can simply remove it and save 4 to 8 bytes in every inode.Signed-off-by: Christoph Hellwig
Acked-by: Ryusuke Konishi
Reviewed-by: Tejun Heo
Reviewed-by: Jan Kara
Signed-off-by: Jens Axboe -
Since "BDI: Provide backing device capability information [try #3]" the
backing_dev_info structure also provides flags for the kind of mmap
operation available in a nommu environment, which is entirely unrelated
to it's original purpose.Introduce a new nommu-only file operation to provide this information to
the nommu mmap code instead. Splitting this from the backing_dev_info
structure allows to remove lots of backing_dev_info instance that aren't
otherwise needed, and entirely gets rid of the concept of providing a
backing_dev_info for a character device. It also removes the need for
the mtd_inodefs filesystem.Signed-off-by: Christoph Hellwig
Reviewed-by: Tejun Heo
Acked-by: Brian Norris
Signed-off-by: Jens Axboe
20 Oct, 2014
1 commit
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I no longer have access to the Panasas email.
So change to an email that can always reach me.Signed-off-by: Boaz Harrosh
09 Aug, 2014
1 commit
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kcalloc manages count*sizeof overflow.
Signed-off-by: Fabian Frederick
Acked-by: Boaz Harrosh
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
13 Jun, 2014
1 commit
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Pull vfs updates from Al Viro:
"This the bunch that sat in -next + lock_parent() fix. This is the
minimal set; there's more pending stuff.In particular, I really hope to get acct.c fixes merged this cycle -
we need that to deal sanely with delayed-mntput stuff. In the next
pile, hopefully - that series is fairly short and localized
(kernel/acct.c, fs/super.c and fs/namespace.c). In this pile: more
iov_iter work. Most of prereqs for ->splice_write with sane locking
order are there and Kent's dio rewrite would also fit nicely on top of
this pile"* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (70 commits)
lock_parent: don't step on stale ->d_parent of all-but-freed one
kill generic_file_splice_write()
ceph: switch to iter_file_splice_write()
shmem: switch to iter_file_splice_write()
nfs: switch to iter_splice_write_file()
fs/splice.c: remove unneeded exports
ocfs2: switch to iter_file_splice_write()
->splice_write() via ->write_iter()
bio_vec-backed iov_iter
optimize copy_page_{to,from}_iter()
bury generic_file_aio_{read,write}
lustre: get rid of messing with iovecs
ceph: switch to ->write_iter()
ceph_sync_direct_write: stop poking into iov_iter guts
ceph_sync_read: stop poking into iov_iter guts
new helper: copy_page_from_iter()
fuse: switch to ->write_iter()
btrfs: switch to ->write_iter()
ocfs2: switch to ->write_iter()
xfs: switch to ->write_iter()
...
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
22 May, 2014
3 commits
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This simple patch adds support for raid6 to the ORE.
Most operations and calculations where already for the general
case. Only things left:
* call async_gen_syndrome() in the case of raid6
(NOTE that the raid6 math is the one supported by the Linux Kernel
see: crypto/async_tx/async_pq.c)
* call _ore_add_parity_unit() twice with only last call generating
the redundancy pages.* Fix couple BUGS in old code
a. In reads when parity==2 it can happen that per_dev->length=0
but per_dev->offset was set and adjusted by _ore_add_sg_seg().
Don't let it be overwritten.
b. The all 'cur_comp > starting_dev' thing to determine if:
"per_dev->offset is in the current stripe number or the
next one."
Was a complete raid5/4 accident. When parity==2 this is not
at all true usually. All we need to do is increment si->ob_offset
once we pass by the first parity device.
(This also greatly simplifies the code, amen)
c. Calculation of si->dev rotation can overflow when parity==2.* Then last enable raid6 in ore_verify_layout()
I want to deeply thank Daniel Gryniewicz who found first all the
bugs in the old raid code, and inspired these patches:
Inspired-by Daniel GryniewiczSigned-off-by: Boaz Harrosh
-
Two cleanups:
* si->cur_comp, si->cur_pg where always calculated after
the call to ore_calc_stripe_info() with the help of
_dev_order(...). But these are already calculated by
ore_calc_stripe_info() and can be just set there.
(This is left over from the time that si->cur_comp, si->cur_pg
were only used by raid code, but now the main loop manages
them anyway even though they are ultimately not used in
none raid code)* si->cur_comp - For the very last stripe case, was set inside
_ore_add_parity_unit(). This is not clear and will be wrong
for coming raid6 so move this to only caller. Now si->cur_comp
is only manipulated within _prepare_for_striping(), always next
to the manipulation of cur_dev.
Which is much easier to understand and follow.Signed-off-by: Boaz Harrosh
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rearrange some source lines. Nothing changed.
Signed-off-by: Boaz Harrosh
07 May, 2014
3 commits
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Signed-off-by: Al Viro
-
Signed-off-by: Al Viro
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unmodified, for now
Signed-off-by: Al Viro
11 Apr, 2014
1 commit
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Pull exofs updates from Boaz Harrosh:
"Trivial updates to exofs for 3.15-rc1Just a few fixes sent by people"
* 'for-linus' of git://git.open-osd.org/linux-open-osd:
MAINTAINERS: Update email address for bhalevy
fs: Mark functions as static in exofs/ore_raid.c
fs: Mark function as static in exofs/super.c
04 Apr, 2014
1 commit
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Reclaim will be leaving shadow entries in the page cache radix tree upon
evicting the real page. As those pages are found from the LRU, an
iput() can lead to the inode being freed concurrently. At this point,
reclaim must no longer install shadow pages because the inode freeing
code needs to ensure the page tree is really empty.Add an address_space flag, AS_EXITING, that the inode freeing code sets
under the tree lock before doing the final truncate. Reclaim will check
for this flag before installing shadow pages.Signed-off-by: Johannes Weiner
Reviewed-by: Rik van Riel
Reviewed-by: Minchan Kim
Cc: Andrea Arcangeli
Cc: Bob Liu
Cc: Christoph Hellwig
Cc: Dave Chinner
Cc: Greg Thelen
Cc: Hugh Dickins
Cc: Jan Kara
Cc: KOSAKI Motohiro
Cc: Luigi Semenzato
Cc: Mel Gorman
Cc: Metin Doslu
Cc: Michel Lespinasse
Cc: Ozgun Erdogan
Cc: Peter Zijlstra
Cc: Roman Gushchin
Cc: Ryan Mallon
Cc: Tejun Heo
Cc: Vlastimil Babka
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
03 Apr, 2014
2 commits
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Mark functions as static in exofs/ore_raid.c because they are not used
outside this file.This also eliminates the following warning in exofs/ore_raid.c:
fs/exofs/ore_raid.c:24:14: warning: no previous prototype for _raid_page_alloc [-Wmissing-prototypes]
fs/exofs/ore_raid.c:29:6: warning: no previous prototype for _raid_page_free [-Wmissing-prototypes]Signed-off-by: Rashika Kheria
Reviewed-by: Josh Triplett
Signed-off-by: Boaz Harrosh -
Mark function as static in exofs/super.c because it is not used outside
this file.This also eliminates the following warning in exofs/super.c:
fs/exofs/super.c:546:5: warning: no previous prototype \
for __alloc_dev_table[-Wmissing-prototypes]Signed-off-by: Rashika Kheria
Reviewed-by: Josh Triplett
Signed-off-by: Boaz Harrosh
24 Jan, 2014
2 commits
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In debug mode exofs is too verbose. Hiding the real problems
remove some trivial stuff.Also fix some other prints.
Signed-off-by: Boaz Harrosh
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If there was an error in fetching an object or extracting
inode info from attributes. Which means corrupted storage.
Let it be an empty ZERO dated directory entry so it can be
deleted. Otherwise the all directory will be inaccessible.This does not loose data, because if there is an orphan object
somewhere it will be recovered by fschk. But usually this only
means corrupted dir entry. The object was never generated and
only its link exist. This way we can delete the bad entry.Signed-off-by: Boaz Harrosh