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Pull more vfs updates from Al Viro:
"Assorted VFS fixes and related cleanups (IMO the most interesting in
that part are f_path-related things and Eric's descriptor-related
stuff). UFS regression fixes (it got broken last cycle). 9P fixes.
fs-cache series, DAX patches, Jan's file_remove_suid() work"
[ I'd say this is much more than "fixes and related cleanups". The
file_table locking rule change by Eric Dumazet is a rather big and
fundamental update even if the patch isn't huge. - Linus ]
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (49 commits)
9p: cope with bogus responses from server in p9_client_{read,write}
p9_client_write(): avoid double p9_free_req()
9p: forgetting to cancel request on interrupted zero-copy RPC
dax: bdev_direct_access() may sleep
block: Add support for DAX reads/writes to block devices
dax: Use copy_from_iter_nocache
dax: Add block size note to documentation
fs/file.c: __fget() and dup2() atomicity rules
fs/file.c: don't acquire files->file_lock in fd_install()
fs:super:get_anon_bdev: fix race condition could cause dev exceed its upper limitation
vfs: avoid creation of inode number 0 in get_next_ino
namei: make set_root_rcu() return void
make simple_positive() public
ufs: use dir_pages instead of ufs_dir_pages()
pagemap.h: move dir_pages() over there
remove the pointless include of lglock.h
fs: cleanup slight list_entry abuse
xfs: Correctly lock inode when removing suid and file capabilities
fs: Call security_ops->inode_killpriv on truncate
fs: Provide function telling whether file_remove_privs() will do anything
...
JFFS2
* fix a theoretical unbalanced locking issue; the lock handling was a bit
unclean, but AFAICT, it didn't actually lead to real deadlocks
NAND
* brcmnand driver: new driver supporting NAND controller found originally on
Broadcom STB SoCs (BCM7xxx), but now also found on BCM63xxx, iProc (e.g.,
Cygnus, BCM5301x), BCM3xxx, and more
* Begin factoring out BBT code so it can be shared between traditional
(parallel) NAND drivers and upcoming SPI NAND drivers (WIP)
* Add common DT-based init support, so nand_base can pick up some flash
properties automatically, using established common NAND DT properties
* mxc_nand: support 8-bit ECC
* pxa3xx_nand:
- fix build for ARM64
- use a jiffies-based timeout
SPI NOR
* Add a few new IDs
* Clear out some unnecessary entries
* Make sure SECT_4K flags are correct for all (?) entries
Core
* Fix mtd->usecount race conditions (BUG_ON())
* Switch to modern PM ops
Other
* CFI: save code space by de-inlining large functions
* Clean up some partition parser selection code across several drivers
* Various miscellaneous changes, mostly minor
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Merge tag 'for-linus-20150623' of git://git.infradead.org/linux-mtd
Pull MTD updates from Brian Norris:
"JFFS2:
- fix a theoretical unbalanced locking issue; the lock handling was a
bit unclean, but AFAICT, it didn't actually lead to real deadlocks
NAND:
- brcmnand driver: new driver supporting NAND controller found
originally on Broadcom STB SoCs (BCM7xxx), but now also found on
BCM63xxx, iProc (e.g., Cygnus, BCM5301x), BCM3xxx, and more
- begin factoring out BBT code so it can be shared between
traditional (parallel) NAND drivers and upcoming SPI NAND drivers
(WIP)
- add common DT-based init support, so nand_base can pick up some
flash properties automatically, using established common NAND DT
properties
- mxc_nand: support 8-bit ECC
- pxa3xx_nand:
* fix build for ARM64
* use a jiffies-based timeout
SPI NOR:
- add a few new IDs
- clear out some unnecessary entries
- make sure SECT_4K flags are correct for all (?) entries
Core:
- fix mtd->usecount race conditions (BUG_ON())
- switch to modern PM ops
Other:
- CFI: save code space by de-inlining large functions
- clean up some partition parser selection code across several
drivers
- various miscellaneous changes, mostly minor"
* tag 'for-linus-20150623' of git://git.infradead.org/linux-mtd: (57 commits)
mtd: docg3: Fix kasprintf() usage
mtd: docg3: Don't leak docg3->bbt in error path
mtd: nandsim: Fix kasprintf() usage
mtd: cs553x_nand: Fix kasprintf() usage
mtd: r852: Fix device_create_file() usage
mtd: brcmnand: drop unnecessary initialization
mtd: propagate error codes from add_mtd_device()
mtd: diskonchip: remove two-phase partitioning / registration
mtd: dc21285: use raw spinlock functions for nw_gpio_lock
mtd: chips: fixup dependencies, to prevent build error
mtd: cfi_cmdset_0002: Initialize datum before calling map_word_load_partial
mtd: cfi: deinline large functions
mtd: lantiq-flash: use default partition parsers
mtd: plat_nand: use default partition probe
mtd: nand: correct indentation within conditional
mtd: remove incorrect file name
mtd: blktrans: use better error code for unimplemented ioctl()
mtd: maps: Spelling s/reseved/reserved/
mtd: blktrans: change blktrans_getgeo return value
mtd: mxc_nand: generate nand_ecclayout for 8 bit ECC
...
list_entry is just a wrapper for container_of, but it is arguably
wrong (and slightly confusing) to use it when the pointed-to struct
member is not a struct list_head. Use container_of directly instead.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Li Zefan reported an unbalanced locking issue, found by his
internal debugging feature on runtime. The particular case he was
looking at doesn't lead to a deadlock, as the structure that this lock
is embedded in is freed on error. But we should straighten out the error
handling.
Because several callers of jffs2_do_read_inode_internal() /
jffs2_do_read_inode() already handle the locking/unlocking and inode
clearing at their own level, let's just push any unlocks/clearing down
to the caller. This consistency is much easier to verify.
Reported-by: Li Zefan <lizefan@huawei.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Pull fourth vfs update from Al Viro:
"d_inode() annotations from David Howells (sat in for-next since before
the beginning of merge window) + four assorted fixes"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
RCU pathwalk breakage when running into a symlink overmounting something
fix I_DIO_WAKEUP definition
direct-io: only inc/dec inode->i_dio_count for file systems
fs/9p: fix readdir()
VFS: assorted d_backing_inode() annotations
VFS: fs/inode.c helpers: d_inode() annotations
VFS: fs/cachefiles: d_backing_inode() annotations
VFS: fs library helpers: d_inode() annotations
VFS: assorted weird filesystems: d_inode() annotations
VFS: normal filesystems (and lustre): d_inode() annotations
VFS: security/: d_inode() annotations
VFS: security/: d_backing_inode() annotations
VFS: net/: d_inode() annotations
VFS: net/unix: d_backing_inode() annotations
VFS: kernel/: d_inode() annotations
VFS: audit: d_backing_inode() annotations
VFS: Fix up some ->d_inode accesses in the chelsio driver
VFS: Cachefiles should perform fs modifications on the top layer only
VFS: AF_UNIX sockets should call mknod on the top layer only
* Add Kconfig option for keeping both the 'master' and 'partition' MTDs
registered as devices. This would really make a better default if we could
do it over, as it allows a lot more flexibility in (1) determining the flash
topology of the system from user-space and (2) adding temporary partitions
at runtime (ioctl(BLKPG)). Unfortunately, this would possibly cause
user-space breakage, as it will cause renumbering of the /dev/mtdX devices.
We'll see if we can change this in the future, as there have already been a
few people looking for this feature, and I know others have just been
working around our current limitations instead of fixing them this way.
* Along with the previous change, add some additional information to sysfs, so
user-space can read the offset of each partition within its master device
SPI NOR:
* add new device tree compatible binding to represent the mostly-compatible
class of SPI NOR flash which can be detected by their extended JEDEC ID
bytes, cutting down the duplication of our ID tables
* misc. new IDs
Various other miscellaneous fixes and changes
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Merge tag 'for-linus-20150422' of git://git.infradead.org/linux-mtd
Pull MTD updates from Brian Norris:
"Common MTD:
- Add Kconfig option for keeping both the 'master' and 'partition'
MTDs registered as devices. This would really make a better
default if we could do it over, as it allows a lot more flexibility
in (1) determining the flash topology of the system from user-space
and (2) adding temporary partitions at runtime (ioctl(BLKPG)).
Unfortunately, this would possibly cause user-space breakage, as it
will cause renumbering of the /dev/mtdX devices. We'll see if we
can change this in the future, as there have already been a few
people looking for this feature, and I know others have just been
working around our current limitations instead of fixing them this
way.
- Along with the previous change, add some additional information to
sysfs, so user-space can read the offset of each partition within
its master device
SPI NOR:
- add new device tree compatible binding to represent the
mostly-compatible class of SPI NOR flash which can be detected by
their extended JEDEC ID bytes, cutting down the duplication of our
ID tables
- misc. new IDs
Various other miscellaneous fixes and changes"
* tag 'for-linus-20150422' of git://git.infradead.org/linux-mtd: (53 commits)
mtd: spi-nor: Add support for Macronix mx25u6435f serial flash
mtd: spi-nor: Add support for Winbond w25q64dw serial flash
mtd: spi-nor: add support for the Winbond W25X05 flash
mtd: spi-nor: support en25s64 device
mtd: m25p80: bind to "nor-jedec" ID, for auto-detection
Documentation: devicetree: m25p80: add "nor-jedec" binding
mtd: Make MTD tests cancelable
mtd: mtd_oobtest: Fix bitflip_limit usage in test case 3
mtd: docg3: remove invalid __exit annotations
mtd: fsl_ifc_nand: use msecs_to_jiffies for time conversion
mtd: atmel_nand: don't map the ROM table if no pmecc table offset in DT
mtd: atmel_nand: add a definition for the oob reserved bytes
mtd: part: Remove partition overlap checks
mtd: part: Add sysfs variable for offset of partition
mtd: part: Create the master device node when partitioned
mtd: ts5500_flash: Fix typo in MODULE_DESCRIPTION in ts5500_flash.c
mtd: denali: Disable sub-page writes in Denali NAND driver
mtd: pxa3xx_nand: cleanup wait_for_completion handling
mtd: nand: gpmi: Check for scan_bbt() error
mtd: nand: gpmi: fixup return type of wait_for_completion_timeout
...
Pull second vfs update from Al Viro:
"Now that net-next went in... Here's the next big chunk - killing
->aio_read() and ->aio_write().
There'll be one more pile today (direct_IO changes and
generic_write_checks() cleanups/fixes), but I'd prefer to keep that
one separate"
* 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (37 commits)
->aio_read and ->aio_write removed
pcm: another weird API abuse
infinibad: weird APIs switched to ->write_iter()
kill do_sync_read/do_sync_write
fuse: use iov_iter_get_pages() for non-splice path
fuse: switch to ->read_iter/->write_iter
switch drivers/char/mem.c to ->read_iter/->write_iter
make new_sync_{read,write}() static
coredump: accept any write method
switch /dev/loop to vfs_iter_write()
serial2002: switch to __vfs_read/__vfs_write
ashmem: use __vfs_read()
export __vfs_read()
autofs: switch to __vfs_write()
new helper: __vfs_write()
switch hugetlbfs to ->read_iter()
coda: switch to ->read_iter/->write_iter
ncpfs: switch to ->read_iter/->write_iter
net/9p: remove (now-)unused helpers
p9_client_attach(): set fid->uid correctly
...
that's the bulk of filesystem drivers dealing with inodes of their own
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Pull trivial tree from Jiri Kosina:
"Usual trivial tree updates. Nothing outstanding -- mostly printk()
and comment fixes and unused identifier removals"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial:
goldfish: goldfish_tty_probe() is not using 'i' any more
powerpc: Fix comment in smu.h
qla2xxx: Fix printks in ql_log message
lib: correct link to the original source for div64_u64
si2168, tda10071, m88ds3103: Fix firmware wording
usb: storage: Fix printk in isd200_log_config()
qla2xxx: Fix printk in qla25xx_setup_mode
init/main: fix reset_device comment
ipwireless: missing assignment
goldfish: remove unreachable line of code
coredump: Fix do_coredump() comment
stacktrace.h: remove duplicate declaration task_struct
smpboot.h: Remove unused function prototype
treewide: Fix typo in printk messages
treewide: Fix typo in printk messages
mod_devicetable: fix comment for match_flags
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 <viro@zeniv.linux.org.uk>
We know "rc" is set so there is no need to check again.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Pull more vfs updates from Al Viro:
"Assorted stuff from this cycle. The big ones here are multilayer
overlayfs from Miklos and beginning of sorting ->d_inode accesses out
from David"
* 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (51 commits)
autofs4 copy_dev_ioctl(): keep the value of ->size we'd used for allocation
procfs: fix race between symlink removals and traversals
debugfs: leave freeing a symlink body until inode eviction
Documentation/filesystems/Locking: ->get_sb() is long gone
trylock_super(): replacement for grab_super_passive()
fanotify: Fix up scripted S_ISDIR/S_ISREG/S_ISLNK conversions
Cachefiles: Fix up scripted S_ISDIR/S_ISREG/S_ISLNK conversions
VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)
SELinux: Use d_is_positive() rather than testing dentry->d_inode
Smack: Use d_is_positive() rather than testing dentry->d_inode
TOMOYO: Use d_is_dir() rather than d_inode and S_ISDIR()
Apparmor: Use d_is_positive/negative() rather than testing dentry->d_inode
Apparmor: mediated_filesystem() should use dentry->d_sb not inode->i_sb
VFS: Split DCACHE_FILE_TYPE into regular and special types
VFS: Add a fallthrough flag for marking virtual dentries
VFS: Add a whiteout dentry type
VFS: Introduce inode-getting helpers for layered/unioned fs environments
Infiniband: Fix potential NULL d_inode dereference
posix_acl: fix reference leaks in posix_acl_create
autofs4: Wrong format for printing dentry
...
Convert the following where appropriate:
(1) S_ISLNK(dentry->d_inode) to d_is_symlink(dentry).
(2) S_ISREG(dentry->d_inode) to d_is_reg(dentry).
(3) S_ISDIR(dentry->d_inode) to d_is_dir(dentry). This is actually more
complicated than it appears as some calls should be converted to
d_can_lookup() instead. The difference is whether the directory in
question is a real dir with a ->lookup op or whether it's a fake dir with
a ->d_automount op.
In some circumstances, we can subsume checks for dentry->d_inode not being
NULL into this, provided we the code isn't in a filesystem that expects
d_inode to be NULL if the dirent really *is* negative (ie. if we're going to
use d_inode() rather than d_backing_inode() to get the inode pointer).
Note that the dentry type field may be set to something other than
DCACHE_MISS_TYPE when d_inode is NULL in the case of unionmount, where the VFS
manages the fall-through from a negative dentry to a lower layer. In such a
case, the dentry type of the negative union dentry is set to the same as the
type of the lower dentry.
However, if you know d_inode is not NULL at the call site, then you can use
the d_is_xxx() functions even in a filesystem.
There is one further complication: a 0,0 chardev dentry may be labelled
DCACHE_WHITEOUT_TYPE rather than DCACHE_SPECIAL_TYPE. Strictly, this was
intended for special directory entry types that don't have attached inodes.
The following perl+coccinelle script was used:
use strict;
my @callers;
open($fd, 'git grep -l \'S_IS[A-Z].*->d_inode\' |') ||
die "Can't grep for S_ISDIR and co. callers";
@callers = <$fd>;
close($fd);
unless (@callers) {
print "No matches\n";
exit(0);
}
my @cocci = (
'@@',
'expression E;',
'@@',
'',
'- S_ISLNK(E->d_inode->i_mode)',
'+ d_is_symlink(E)',
'',
'@@',
'expression E;',
'@@',
'',
'- S_ISDIR(E->d_inode->i_mode)',
'+ d_is_dir(E)',
'',
'@@',
'expression E;',
'@@',
'',
'- S_ISREG(E->d_inode->i_mode)',
'+ d_is_reg(E)' );
my $coccifile = "tmp.sp.cocci";
open($fd, ">$coccifile") || die $coccifile;
print($fd "$_\n") || die $coccifile foreach (@cocci);
close($fd);
foreach my $file (@callers) {
chomp $file;
print "Processing ", $file, "\n";
system("spatch", "--sp-file", $coccifile, $file, "--in-place", "--no-show-diff") == 0 ||
die "spatch failed";
}
[AV: overlayfs parts skipped]
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Remove the function pulledbits() that is not used anywhere.
This was partially found by using a static code analysis program called cppcheck.
Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Reviewed-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
schedule_delayed_work() happening when the work is already pending is
a cheap no-op. Don't bother with ->wbuf_queued logics - it's both
broken (cancelling ->wbuf_dwork leaves it set, as spotted by Jeff Harris)
and pointless. It's cheaper to let schedule_delayed_work() handle that
case.
Reported-by: Jeff Harris <jefftharris@gmail.com>
Tested-by: Jeff Harris <jefftharris@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
AMD-compatible CFI driver:
- Support OTP programming for Micron M29EW family
- Increase buffer write timeout, according to detected flash parameter info
NAND
- Add helpers for retrieving ONFI timing modes
- GPMI: provide option to disable bad block marker swapping (required for
Ka-On electronics platforms)
SPI NOR
- EON EN25QH128 support
- Support new Flag Status Register (FSR) on a few Micron flash
Common
- New sysfs entries for bad block and ECC stats
And a few miscellaneous refactorings, cleanups, and driver improvements
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Merge tag 'for-linus-20140808' of git://git.infradead.org/linux-mtd
Pull MTD updates from Brian Norris:
"AMD-compatible CFI driver:
- Support OTP programming for Micron M29EW family
- Increase buffer write timeout, according to detected flash
parameter info
NAND
- Add helpers for retrieving ONFI timing modes
- GPMI: provide option to disable bad block marker swapping (required
for Ka-On electronics platforms)
SPI NOR
- EON EN25QH128 support
- Support new Flag Status Register (FSR) on a few Micron flash
Common
- New sysfs entries for bad block and ECC stats
And a few miscellaneous refactorings, cleanups, and driver
improvements"
* tag 'for-linus-20140808' of git://git.infradead.org/linux-mtd: (31 commits)
mtd: gpmi: make blockmark swapping optional
mtd: gpmi: remove line breaks from error messages and improve wording
mtd: gpmi: remove useless (void *) type casts and spaces between type casts and variables
mtd: atmel_nand: NFC: support multiple interrupt handling
mtd: atmel_nand: implement the nfc_device_ready() by checking the R/B bit
mtd: atmel_nand: add NFC status error check
mtd: atmel_nand: make ecc parameters same as definition
mtd: nand: add ONFI timing mode to nand_timings converter
mtd: nand: define struct nand_timings
mtd: cfi_cmdset_0002: fix do_write_buffer() timeout error
mtd: denali: use 8 bytes for READID command
mtd/ftl: fix the double free of the buffers allocated in build_maps()
mtd: phram: Fix whitespace issues
mtd: spi-nor: add support for EON EN25QH128
mtd: cfi_cmdset_0002: Add support for locking OTP memory
mtd: cfi_cmdset_0002: Add support for writing OTP memory
mtd: cfi_cmdset_0002: Invalidate cache after entering/exiting OTP memory
mtd: cfi_cmdset_0002: Add support for reading OTP
mtd: spi-nor: add support for flag status register on Micron chips
mtd: Account for BBT blocks when a partition is being allocated
...
Now with 64bit bzImage and kexec tools, we support ramdisk that size is
bigger than 2g, as we could put it above 4G.
Found compressed initramfs image could not be decompressed properly. It
turns out that image length is int during decompress detection, and it
will become < 0 when length is more than 2G. Furthermore, during
decompressing len as int is used for inbuf count, that has problem too.
Change len to long, that should be ok as on 32 bit platform long is
32bits.
Tested with following compressed initramfs image as root with kexec.
gzip, bzip2, xz, lzma, lzop, lz4.
run time for populate_rootfs():
size name Nehalem-EX Westmere-EX Ivybridge-EX
9034400256 root_img : 26s 24s 30s
3561095057 root_img.lz4 : 28s 27s 27s
3459554629 root_img.lzo : 29s 29s 28s
3219399480 root_img.gz : 64s 62s 49s
2251594592 root_img.xz : 262s 260s 183s
2226366598 root_img.lzma: 386s 376s 277s
2901482513 root_img.bz2 : 635s 599s
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Rashika Kheria <rashika.kheria@gmail.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Kyungsik Lee <kyungsik.lee@lge.com>
Cc: P J P <ppandit@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: "Daniel M. Weeks" <dan@danweeks.net>
Cc: Alexandre Courbot <acourbot@nvidia.com>
Cc: Jan Beulich <JBeulich@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix checkpatch warning:
WARNING: kfree(NULL) is safe this check is probably not required
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: linux-mtd@lists.infradead.org
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Fix checkpatch warning:
WARNING: kfree(NULL) is safe this check is probably not required
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: linux-mtd@lists.infradead.org
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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()
...
jffs2_garbage_collect_thread() does disallow_signal(SIGHUP) around
jffs2_garbage_collect_pass() and the comment says "We don't want SIGHUP
to interrupt us".
But disallow_signal() can't ensure that jffs2_garbage_collect_pass()
won't be interrupted by SIGHUP, the problem is that SIGHUP can be
already pending when disallow_signal() is called, and in this case any
interruptible sleep won't block.
Note: this is in fact because disallow_signal() is buggy and should be
fixed, see the next changes.
But there is another reason why disallow_signal() is wrong: SIG_IGN set
by disallow_signal() silently discards any SIGHUP which can be sent
before the next allow_signal(SIGHUP).
Change this code to use sigprocmask(SIG_UNBLOCK/SIG_BLOCK, SIGHUP).
This even matches the old (and wrong) semantics allow/disallow had when
this logic was written.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- A few SPI NOR ID definitions
- Kill the NAND "max pagesize" restriction
- Fix some x16 bus-width NAND support
- Add NAND JEDEC parameter page support
- DT bindings for NAND ECC
- GPMI NAND updates (subpage reads)
- More OMAP NAND refactoring
- New STMicro SPI NOR driver (now in 40 patches!)
- A few other random bugfixes
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Merge tag 'for-linus-20140405' of git://git.infradead.org/linux-mtd
Pull MTD updates from Brian Norris:
- A few SPI NOR ID definitions
- Kill the NAND "max pagesize" restriction
- Fix some x16 bus-width NAND support
- Add NAND JEDEC parameter page support
- DT bindings for NAND ECC
- GPMI NAND updates (subpage reads)
- More OMAP NAND refactoring
- New STMicro SPI NOR driver (now in 40 patches!)
- A few other random bugfixes
* tag 'for-linus-20140405' of git://git.infradead.org/linux-mtd: (120 commits)
Fix index regression in nand_read_subpage
mtd: diskonchip: mem resource name is not optional
mtd: nand: fix mention to CONFIG_MTD_NAND_ECC_BCH
mtd: nand: fix GET/SET_FEATURES address on 16-bit devices
mtd: omap2: Use devm_ioremap_resource()
mtd: denali_dt: Use devm_ioremap_resource()
mtd: devices: elm: update DRIVER_NAME as "omap-elm"
mtd: devices: elm: configure parallel channels based on ecc_steps
mtd: devices: elm: clean elm_load_syndrome
mtd: devices: elm: check for hardware engine's design constraints
mtd: st_spi_fsm: Succinctly reorganise .remove()
mtd: st_spi_fsm: Allow loop to run at least once before giving up CPU
mtd: st_spi_fsm: Correct vendor name spelling issue - missing "M"
mtd: st_spi_fsm: Avoid duplicating MTD core code
mtd: st_spi_fsm: Remove useless consts from function arguments
mtd: st_spi_fsm: Convert ST SPI FSM (NOR) Flash driver to new DT partitions
mtd: st_spi_fsm: Move runtime configurable msg sequences into device's struct
mtd: st_spi_fsm: Supply the W25Qxxx chip specific configuration call-back
mtd: st_spi_fsm: Supply the S25FLxxx chip specific configuration call-back
mtd: st_spi_fsm: Supply the MX25xxx chip specific configuration call-back
...
and COLLAPSE_RANGE fallocate operations, and scalability improvements
in the jbd2 layer and in xattr handling when the extended attributes
spill over into an external block.
Other than that, the usual clean ups and minor bug fixes.
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Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 updates from Ted Ts'o:
"Major changes for 3.14 include support for the newly added ZERO_RANGE
and COLLAPSE_RANGE fallocate operations, and scalability improvements
in the jbd2 layer and in xattr handling when the extended attributes
spill over into an external block.
Other than that, the usual clean ups and minor bug fixes"
* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (42 commits)
ext4: fix premature freeing of partial clusters split across leaf blocks
ext4: remove unneeded test of ret variable
ext4: fix comment typo
ext4: make ext4_block_zero_page_range static
ext4: atomically set inode->i_flags in ext4_set_inode_flags()
ext4: optimize Hurd tests when reading/writing inodes
ext4: kill i_version support for Hurd-castrated file systems
ext4: each filesystem creates and uses its own mb_cache
fs/mbcache.c: doucple the locking of local from global data
fs/mbcache.c: change block and index hash chain to hlist_bl_node
ext4: Introduce FALLOC_FL_ZERO_RANGE flag for fallocate
ext4: refactor ext4_fallocate code
ext4: Update inode i_size after the preallocation
ext4: fix partial cluster handling for bigalloc file systems
ext4: delete path dealloc code in ext4_ext_handle_uninitialized_extents
ext4: only call sync_filesystm() when remounting read-only
fs: push sync_filesystem() down to the file system's remount_fs()
jbd2: improve error messages for inconsistent journal heads
jbd2: minimize region locked by j_list_lock in jbd2_journal_forget()
jbd2: minimize region locked by j_list_lock in journal_get_create_access()
...
This patch removes read_cache_page_async() which wasn't really needed
anywhere and simplifies the code around it a bit.
read_cache_page_async() is useful when we want to read a page into the
cache without waiting for it to complete. This happens when the
appropriate callback 'filler' doesn't complete its read operation and
releases the page lock immediately, and instead queues a different
completion routine to do that. This never actually happened anywhere in
the code.
read_cache_page_async() had 3 different callers:
- read_cache_page() which is the sync version, it would just wait for
the requested read to complete using wait_on_page_read().
- JFFS2 would call it from jffs2_gc_fetch_page(), but the filler
function it supplied doesn't do any async reads, and would complete
before the filler function returns - making it actually a sync read.
- CRAMFS would call it using the read_mapping_page_async() wrapper, with
a similar story to JFFS2 - the filler function doesn't do anything that
reminds async reads and would always complete before the filler function
returns.
To sum it up, the code in mm/filemap.c never took advantage of having
read_cache_page_async(). While there are filler callbacks that do async
reads (such as the block one), we always called it with the
read_cache_page().
This patch adds a mandatory wait for read to complete when adding a new
page to the cache, and removes read_cache_page_async() and its wrappers.
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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 <hannes@cmpxchg.org>
Reviewed-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Minchan Kim <minchan@kernel.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Bob Liu <bob.liu@oracle.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jan Kara <jack@suse.cz>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Luigi Semenzato <semenzato@google.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Metin Doslu <metin@citusdata.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Ozgun Erdogan <ozgun@citusdata.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roman Gushchin <klamm@yandex-team.ru>
Cc: Ryan Mallon <rmallon@gmail.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
If jffs2_new_inode() succeeds, it returns with f->sem held, and the caller
is responsible for releasing the lock. If it fails, it still returns with
the lock held, but the caller won't release the lock, which will lead to
deadlock.
Fix it by releasing the lock in jffs2_new_inode() on error.
Signed-off-by: Wang Guoli <andy.wangguoli@huawei.com>
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Wang Guoli <andy.wangguoli@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
[Brian: not marked for stable; no one observed deadlock, and I don't
think it can happen here]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
@wait is a local variable, so if we don't remove it from the wait queue
list, later wake_up() may end up accessing invalid memory.
This was spotted by eyes.
Signed-off-by: Li Zefan <lizefan@huawei.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
- Add me (Brian Norris) as an additional MTD maintainer (it'd be nice to get
David's "ack" for this; I'm sure he approves, but he's been pretty silent
lately)
- Add Ezequiel Garcie as maintainer for the pxa3xx NAND driver
- Last (?) round of pxa3xx improvements for supporting Armada 370/XP
- Typical churn in driver boilerplate (OOM messages, printk()'s, devm_*, etc.)
- Quad read mode support for SPI NOR driver (m25p80)
- Update Davinci NAND driver to prepare for use on new platforms
- Begin to kill off NAND_MAX_{PAGE,OOB}SIZE macros; more work is pending
- Miscellaneous NAND device support (new IDs)
- Add READ RETRY support for Micron MLC NAND
- Support new GPMI NAND ECC layout device-tree binding
- Avoid mapping stack/vmalloc() memory for GPMI NAND DMA
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Merge tag 'for-linus-20140127' of git://git.infradead.org/linux-mtd
Pull MTD updates from Brian Norris:
- Add me (Brian Norris) as an additional MTD maintainer (it'd be nice to get
David's "ack" for this; I'm sure he approves, but he's been pretty silent
lately)
- Add Ezequiel Garcie as maintainer for the pxa3xx NAND driver
- Last (?) round of pxa3xx improvements for supporting Armada 370/XP
- Typical churn in driver boilerplate (OOM messages, printk()'s, devm_*, etc.)
- Quad read mode support for SPI NOR driver (m25p80)
- Update Davinci NAND driver to prepare for use on new platforms
- Begin to kill off NAND_MAX_{PAGE,OOB}SIZE macros; more work is pending
- Miscellaneous NAND device support (new IDs)
- Add READ RETRY support for Micron MLC NAND
- Support new GPMI NAND ECC layout device-tree binding
- Avoid mapping stack/vmalloc() memory for GPMI NAND DMA
* tag 'for-linus-20140127' of git://git.infradead.org/linux-mtd: (151 commits)
mtd: gpmi: add sanity check when mapping DMA for read_buf/write_buf
mtd: gpmi: allocate a proper buffer for non ECC read/write
mtd: m25p80: Set rx_nbits for Quad SPI transfers
mtd: m25p80: Enable Quad SPI read transfers for s25fl512s
mtd: s3c2410: Merge plat/regs-nand.h into s3c2410.c
mtd: mtdram: add missing 'const'
mtd: m25p80: assign default read command
mtd: nuc900_nand: remove redundant return value check of platform_get_resource()
mtd: plat_nand: remove redundant return value check of platform_get_resource()
mtd: nand: add Intel manufacturer ID
mtd: nand: add SanDisk manufacturer ID
mtd: nand: add support for Samsung K9LCG08U0B
mtd: nand: pxa3xx: Add support for 2048 bytes page size devices
mtd: m25p80: Use OPCODE_QUAD_READ_4B for 4-byte addressing
mtd: nand: don't use {read,write}_buf for 8-bit transfers
mtd: nand: use __packed shorthand
mtd: nand: support Micron READ RETRY
mtd: nand: add generic READ RETRY support
mtd: nand: add ONFI vendor block for Micron
mtd: nand: localize ECC failures per page
...
Pull vfs updates from Al Viro:
"Assorted stuff; the biggest pile here is Christoph's ACL series. Plus
assorted cleanups and fixes all over the place...
There will be another pile later this week"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (43 commits)
__dentry_path() fixes
vfs: Remove second variable named error in __dentry_path
vfs: Is mounted should be testing mnt_ns for NULL or error.
Fix race when checking i_size on direct i/o read
hfsplus: remove can_set_xattr
nfsd: use get_acl and ->set_acl
fs: remove generic_acl
nfs: use generic posix ACL infrastructure for v3 Posix ACLs
gfs2: use generic posix ACL infrastructure
jfs: use generic posix ACL infrastructure
xfs: use generic posix ACL infrastructure
reiserfs: use generic posix ACL infrastructure
ocfs2: use generic posix ACL infrastructure
jffs2: use generic posix ACL infrastructure
hfsplus: use generic posix ACL infrastructure
f2fs: use generic posix ACL infrastructure
ext2/3/4: use generic posix ACL infrastructure
btrfs: use generic posix ACL infrastructure
fs: make posix_acl_create more useful
fs: make posix_acl_chmod more useful
...
Also don't bother to set up a .get_acl method for symlinks as we do not
support access control (ACLs or even mode bits) for symlinks in Linux.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Rename the current posix_acl_created to __posix_acl_create and add
a fully featured helper to set up the ACLs on file creation that
uses get_acl().
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Rename the current posix_acl_chmod to __posix_acl_chmod and add
a fully featured ACL chmod helper that uses the ->set_acl inode
operation.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Use rbtree_postorder_for_each_entry_safe() to destroy the rbtree instead
of opencoding an alternate postorder iteration that modifies the tree
Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Jan Kara <jack@suse.cz>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
NULL return of kmem_cache_zalloc should be handled in jffs2_alloc_xattr_datum
and jff2_alloc_xattr_ref.
Signed-off-by: Zhouyi Zhou <yizhouzhou@ict.ac.cn>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
We should not support the MLC nand for jffs2. So if the nand type is
MLC, we quit immediatly.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Modify the request_module to prefix the file system type with "fs-"
and add aliases to all of the filesystems that can be built as modules
to match.
A common practice is to build all of the kernel code and leave code
that is not commonly needed as modules, with the result that many
users are exposed to any bug anywhere in the kernel.
Looking for filesystems with a fs- prefix limits the pool of possible
modules that can be loaded by mount to just filesystems trivially
making things safer with no real cost.
Using aliases means user space can control the policy of which
filesystem modules are auto-loaded by editing /etc/modprobe.d/*.conf
with blacklist and alias directives. Allowing simple, safe,
well understood work-arounds to known problematic software.
This also addresses a rare but unfortunate problem where the filesystem
name is not the same as it's module name and module auto-loading
would not work. While writing this patch I saw a handful of such
cases. The most significant being autofs that lives in the module
autofs4.
This is relevant to user namespaces because we can reach the request
module in get_fs_type() without having any special permissions, and
people get uncomfortable when a user specified string (in this case
the filesystem type) goes all of the way to request_module.
After having looked at this issue I don't think there is any
particular reason to perform any filtering or permission checks beyond
making it clear in the module request that we want a filesystem
module. The common pattern in the kernel is to call request_module()
without regards to the users permissions. In general all a filesystem
module does once loaded is call register_filesystem() and go to sleep.
Which means there is not much attack surface exposed by loading a
filesytem module unless the filesystem is mounted. In a user
namespace filesystems are not mounted unless .fs_flags = FS_USERNS_MOUNT,
which most filesystems do not set today.
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Acked-by: Kees Cook <keescook@chromium.org>
Reported-by: Kees Cook <keescook@google.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Pull vfs pile (part one) from Al Viro:
"Assorted stuff - cleaning namei.c up a bit, fixing ->d_name/->d_parent
locking violations, etc.
The most visible changes here are death of FS_REVAL_DOT (replaced with
"has ->d_weak_revalidate()") and a new helper getting from struct file
to inode. Some bits of preparation to xattr method interface changes.
Misc patches by various people sent this cycle *and* ocfs2 fixes from
several cycles ago that should've been upstream right then.
PS: the next vfs pile will be xattr stuff."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (46 commits)
saner proc_get_inode() calling conventions
proc: avoid extra pde_put() in proc_fill_super()
fs: change return values from -EACCES to -EPERM
fs/exec.c: make bprm_mm_init() static
ocfs2/dlm: use GFP_ATOMIC inside a spin_lock
ocfs2: fix possible use-after-free with AIO
ocfs2: Fix oops in ocfs2_fast_symlink_readpage() code path
get_empty_filp()/alloc_file() leave both ->f_pos and ->f_version zero
target: writev() on single-element vector is pointless
export kernel_write(), convert open-coded instances
fs: encode_fh: return FILEID_INVALID if invalid fid_type
kill f_vfsmnt
vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op
nfsd: handle vfs_getattr errors in acl protocol
switch vfs_getattr() to struct path
default SET_PERSONALITY() in linux/elf.h
ceph: prepopulate inodes only when request is aborted
d_hash_and_lookup(): export, switch open-coded instances
9p: switch v9fs_set_create_acl() to inode+fid, do it before d_instantiate()
9p: split dropping the acls from v9fs_set_create_acl()
...
