Stephen Hemminger [Fri, 14 May 2010 00:53:14 +0000 (17:53 -0700)]
fs: xattr_handler table should be const
The entries in xattr handler table should be immutable (ie const)
like other operation tables.
Later patches convert common filesystems. Uncoverted filesystems
will still work, but will generate a compiler warning.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Josef Bacik [Tue, 23 Mar 2010 14:34:56 +0000 (10:34 -0400)]
Introduce freeze_super and thaw_super for the fsfreeze ioctl
Currently the way we do freezing is by passing sb>s_bdev to freeze_bdev and then
letting it do all the work. But freezing is more of an fs thing, and doesn't
really have much to do with the bdev at all, all the work gets done with the
super. In btrfs we do not populate s_bdev, since we can have multiple bdev's
for one fs and setting s_bdev makes removing devices from a pool kind of tricky.
This means that freezing a btrfs filesystem fails, which causes us to corrupt
with things like tux-on-ice which use the fsfreeze mechanism. So instead of
populating sb->s_bdev with a random bdev in our pool, I've broken the actual fs
freezing stuff into freeze_super and thaw_super. These just take the
super_block that we're freezing and does the appropriate work. It's basically
just copy and pasted from freeze_bdev. I've then converted freeze_bdev over to
use the new super helpers. I've tested this with ext4 and btrfs and verified
everything continues to work the same as before.
The only new gotcha is multiple calls to the fsfreeze ioctl will return EBUSY if
the fs is already frozen. I thought this was a better solution than adding a
freeze counter to the super_block, but if everybody hates this idea I'm open to
suggestions. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Tue, 23 Mar 2010 17:56:07 +0000 (13:56 -0400)]
Trim includes in fs/super.c
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Tue, 23 Mar 2010 15:11:05 +0000 (11:11 -0400)]
Move grabbing s_umount to callers of grab_super()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Tue, 23 Mar 2010 14:37:36 +0000 (10:37 -0400)]
Take statfs variants to fs/statfs.c
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Tue, 23 Mar 2010 10:36:54 +0000 (06:36 -0400)]
switch selinux delayed superblock handling to iterate_supers()
... kill their private list, while we are at it
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Tue, 23 Mar 2010 10:06:58 +0000 (06:06 -0400)]
new helper: iterate_supers()
... and switch the simple "loop over superblocks and do something"
loops to it.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Tue, 23 Mar 2010 01:13:53 +0000 (21:13 -0400)]
Bury __put_super_and_need_restart()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Tue, 23 Mar 2010 00:27:55 +0000 (20:27 -0400)]
fix prune_dcache()/umount() race
... and get rid of the last __put_super_and_need_restart() caller
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Tue, 23 Mar 2010 00:23:25 +0000 (20:23 -0400)]
In get_super() and user_get_super() restarts are unconditional
If superblock had been still alive, we would've returned it...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Tue, 23 Mar 2010 00:15:33 +0000 (20:15 -0400)]
fix get_active_super()/umount() race
This one needs restarts...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Tue, 23 Mar 2010 00:11:53 +0000 (20:11 -0400)]
fix do_emergency_remount()/umount() races
need list_for_each_entry_safe() here. Original didn't even
have restart logics, so if you race with umount() it blew up.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Tue, 23 Mar 2010 00:09:33 +0000 (20:09 -0400)]
Convert simple loops over superblocks to list_for_each_entry_safe
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Mon, 22 Mar 2010 23:56:42 +0000 (19:56 -0400)]
get rid of restarts in sync_filesystems()
At the same time we can kill s_need_restart and local mutex in there.
__put_super() made public for a while; will be gone later.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Mon, 22 Mar 2010 23:36:35 +0000 (19:36 -0400)]
Leave superblocks on s_list until the end
We used to remove from s_list and s_instances at the same
time. So let's *not* do the former and skip superblocks
that have empty s_instances in the loops over s_list.
The next step, of course, will be to get rid of rescan logics
in those loops.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Mon, 22 Mar 2010 19:22:31 +0000 (15:22 -0400)]
Saner locking around deactivate_super()
Make sure that s_umount is acquired *before* we drop the final
active reference; we still have the fast path (atomic_dec_unless)
and we have gotten rid of the window between the moment when
s_active hits zero and s_umount is acquired. Which simplifies
the living hell out of grab_super() and inotify pin_to_kill()
stuff.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Mon, 22 Mar 2010 12:53:19 +0000 (08:53 -0400)]
get rid of S_BIAS
use atomic_inc_not_zero(&sb->s_active) instead of playing games with
checking ->s_count > S_BIAS
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Mon, 22 Mar 2010 02:34:11 +0000 (22:34 -0400)]
get rid of open-coded grab_super() in get_active_super()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sun, 21 Mar 2010 23:24:23 +0000 (19:24 -0400)]
sb_entry() has been killed a couple of years ago and resurrected on mismerge
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sun, 21 Mar 2010 23:22:29 +0000 (19:22 -0400)]
ceph: should use deactivate_locked_super() on failure exits
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sun, 21 Mar 2010 16:24:29 +0000 (12:24 -0400)]
Clean ecryptfs ->get_sb() up
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sun, 21 Mar 2010 02:32:26 +0000 (22:32 -0400)]
fix a couple of ecryptfs leaks
First of all, get_sb_nodev() grabs anon dev minor and we
never free it in ecryptfs ->kill_sb(). Moreover, on one
of the failure exits in ecryptfs_get_sb() we leak things -
it happens before we set ->s_root and ->put_super() won't
be called in that case. Solution: kill ->put_super(), do
all that stuff in ->kill_sb(). And use kill_anon_sb() instead
of generic_shutdown_super() to deal with anon dev leak.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Sun, 21 Mar 2010 01:57:43 +0000 (21:57 -0400)]
Simplify devpts_get_sb() failure exits
postpone simple_set_mnt() until we know we won't fail.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Christoph Hellwig [Mon, 1 Feb 2010 20:55:52 +0000 (21:55 +0100)]
remove incorrect comment in do_emergency_remount
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro [Fri, 21 May 2010 20:11:04 +0000 (16:11 -0400)]
clean DCACHE_CANT_MOUNT in d_delete()
We set the "it's dead, don't mount on it" flag _and_ do not remove it if
we turn the damn thing negative and leave it around. And if it goes
positive afterwards, well...
Fortunately, there's only one place where that needs to be caught:
only d_delete() can turn the sucker negative without immediately freeing
it; all other places that can lead to ->d_iput() call are followed by
unconditionally freeing struct dentry in question. So the fix is obvious:
Addresses https://bugzilla.kernel.org/show_bug.cgi?id=16014
Reported-by: Adam Tkac <vonsch@gmail.com>
Tested-by: Adam Tkac <vonsch@gmail.com>
Cc: <stable@kernel.org> [2.6.34.x]
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Linus Torvalds [Fri, 21 May 2010 18:17:43 +0000 (11:17 -0700)]
Merge branch 'for_linus' of git://git./linux/kernel/git/jack/linux-udf-2.6
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-udf-2.6:
udf: BKL ioctl pushdown
Linus Torvalds [Fri, 21 May 2010 18:17:05 +0000 (11:17 -0700)]
Merge branch 'next' of git://git./linux/kernel/git/benh/powerpc
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (92 commits)
powerpc: Remove unused 'protect4gb' boot parameter
powerpc: Build-in e1000e for pseries & ppc64_defconfig
powerpc/pseries: Make request_ras_irqs() available to other pseries code
powerpc/numa: Use ibm,architecture-vec-5 to detect form 1 affinity
powerpc/numa: Set a smaller value for RECLAIM_DISTANCE to enable zone reclaim
powerpc: Use smt_snooze_delay=-1 to always busy loop
powerpc: Remove check of ibm,smt-snooze-delay OF property
powerpc/kdump: Fix race in kdump shutdown
powerpc/kexec: Fix race in kexec shutdown
powerpc/kexec: Speedup kexec hash PTE tear down
powerpc/pseries: Add hcall to read 4 ptes at a time in real mode
powerpc: Use more accurate limit for first segment memory allocations
powerpc/kdump: Use chip->shutdown to disable IRQs
powerpc/kdump: CPUs assume the context of the oopsing CPU
powerpc/crashdump: Do not fail on NULL pointer dereferencing
powerpc/eeh: Fix oops when probing in early boot
powerpc/pci: Check devices status property when scanning OF tree
powerpc/vio: Switch VIO Bus PM to use generic helpers
powerpc: Avoid bad relocations in iSeries code
powerpc: Use common cpu_die (fixes SMP+SUSPEND build)
...
Linus Torvalds [Fri, 21 May 2010 18:14:52 +0000 (11:14 -0700)]
Merge branch 'drm-for-2.6.35' of git://git./linux/kernel/git/airlied/drm-2.6
* 'drm-for-2.6.35' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (207 commits)
drm/radeon/kms/pm/r600: select the mid clock mode for single head low profile
drm/radeon: fix power supply kconfig interaction.
drm/radeon/kms: record object that have been list reserved
drm/radeon: AGP memory is only I/O if the aperture can be mapped by the CPU.
drm/radeon/kms: don't default display priority to high on rs4xx
drm/edid: fix typo in 1600x1200@75 mode
drm/nouveau: fix i2c-related init table handlers
drm/nouveau: support init table i2c device identifier 0x81
drm/nouveau: ensure we've parsed i2c table entry for INIT_*I2C* handlers
drm/nouveau: display error message for any failed init table opcode
drm/nouveau: fix init table handlers to return proper error codes
drm/nv50: support fractional feedback divider on newer chips
drm/nv50: fix monitor detection on certain chipsets
drm/nv50: store full dcb i2c entry from vbios
drm/nv50: fix suspend/resume with DP outputs
drm/nv50: output calculated crtc pll when debugging on
drm/nouveau: dump pll limits entries when debugging is on
drm/nouveau: bios parser fixes for eDP boards
drm/nouveau: fix a nouveau_bo dereference after it's been destroyed
drm/nv40: remove some completed ctxprog TODOs
...
Linus Torvalds [Fri, 21 May 2010 18:10:41 +0000 (11:10 -0700)]
Merge branch 'dbg-early-merge' of git://git./linux/kernel/git/jwessel/linux-2.6-kgdb
* 'dbg-early-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb:
echi-dbgp: Add kernel debugger support for the usb debug port
earlyprintk,vga,kdb: Fix \b and \r for earlyprintk=vga with kdb
kgdboc: Add ekgdboc for early use of the kernel debugger
x86,early dr regs,kgdb: Allow kernel debugger early dr register access
x86,kgdb: Implement early hardware breakpoint debugging
x86, kgdb, init: Add early and late debug states
x86, kgdb: early trap init for early debug
Linus Torvalds [Fri, 21 May 2010 18:08:05 +0000 (11:08 -0700)]
Merge branch 'kdb-merge' of git://git./linux/kernel/git/jwessel/linux-2.6-kgdb
* 'kdb-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb: (25 commits)
kdb,debug_core: Allow the debug core to receive a panic notification
MAINTAINERS: update kgdb, kdb, and debug_core info
debug_core,kdb: Allow the debug core to process a recursive debug entry
printk,kdb: capture printk() when in kdb shell
kgdboc,kdb: Allow kdb to work on a non open console port
kgdb: Add the ability to schedule a breakpoint via a tasklet
mips,kgdb: kdb low level trap catch and stack trace
powerpc,kgdb: Introduce low level trap catching
x86,kgdb: Add low level debug hook
kgdb: remove post_primary_code references
kgdb,docs: Update the kgdb docs to include kdb
kgdboc,keyboard: Keyboard driver for kdb with kgdb
kgdb: gdb "monitor" -> kdb passthrough
sparc,sunzilog: Add console polling support for sunzilog serial driver
sh,sh-sci: Use NO_POLL_CHAR in the SCIF polled console code
kgdb,8250,pl011: Return immediately from console poll
kgdb: core changes to support kdb
kdb: core for kgdb back end (2 of 2)
kdb: core for kgdb back end (1 of 2)
kgdb,blackfin: Add in kgdb_arch_set_pc for blackfin
...
Linus Torvalds [Fri, 21 May 2010 17:51:03 +0000 (10:51 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/jikos/hid
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (59 commits)
HID: fix up 'EMBEDDED' mess in Kconfig
HID: roccat: cleanup preprocessor macros
HID: roccat: refactor special event handling
HID: roccat: fix special button support
HID: roccat: Correctly mark init and exit functions
HID: hidraw: Use Interrupt Endpoint for OUT Transfers if Available
HID: hid-samsung: remove redundant key mappings
HID: add omitted hid-zydacron.c file
HID: hid-samsung: add support for Creative Desktop Wireless 6000
HID: picolcd: Eliminate use after free
HID: Zydacron Remote Control driver
HID: Use kmemdup
HID: magicmouse: fix input registration
HID: make Prodikeys driver standalone config option
HID: Prodikeys PC-MIDI HID Driver
HID: hidraw: fix indentation
HID: ntrig: add filtering module parameters
HID: ntrig: add sysfs access to filter parameters
HID: ntrig: add sensitivity and responsiveness support
HID: add multi-input quirk for eGalax Touchcontroller
...
Linus Torvalds [Fri, 21 May 2010 17:50:28 +0000 (10:50 -0700)]
Merge branch 'for_linus' of git://git./linux/kernel/git/jack/linux-fs-2.6
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6: (31 commits)
dquot: Detect partial write error to quota file in write_blk() and add printk_ratelimit for quota error messages
ocfs2: Fix lock inversion in quotas during umount
ocfs2: Use __dquot_transfer to avoid lock inversion
ocfs2: Fix NULL pointer deref when writing local dquot
ocfs2: Fix estimate of credits needed for quota allocation
ocfs2: Fix quota locking
ocfs2: Avoid unnecessary block mapping when refreshing quota info
ocfs2: Do not map blocks from local quota file on each write
quota: Refactor dquot_transfer code so that OCFS2 can pass in its references
quota: unify quota init condition in setattr
quota: remove sb_has_quota_active in get/set_info
quota: unify ->set_dqblk
quota: unify ->get_dqblk
ext3: make barrier options consistent with ext4
quota: Make quota stat accounting lockless.
suppress warning: "quotatypes" defined but not used
ext3: Fix waiting on transaction during fsync
jbd: Provide function to check whether transaction will issue data barrier
ufs: add ufs speciffic ->setattr call
BKL: Remove BKL from ext2 filesystem
...
Linus Torvalds [Fri, 21 May 2010 17:50:00 +0000 (10:50 -0700)]
Merge branch 'omap-for-linus' of git://git./linux/kernel/git/tmlind/linux-omap-2.6
* 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6: (113 commits)
omap4: Add support for i2c init
omap: Fix i2c platform init code for omap4
OMAP2 clock: fix recursive spinlock attempt when CONFIG_CPU_FREQ=y
OMAP powerdomain, hwmod, omap_device: add some credits
OMAP4 powerdomain: Support LOWPOWERSTATECHANGE for powerdomains
OMAP3 clock: add support for setting the divider for sys_clkout2 using clk_set_rate
OMAP4 powerdomain: Fix pwrsts flags for ALWAYS ON domains
OMAP: timers: Fix clock source names for OMAP4
OMAP4 clock: Support clk_set_parent
OMAP4: PRCM: Add offset defines for all CM registers
OMAP4: PRCM: Add offset defines for all PRM registers
OMAP4: PRCM: Remove duplicate definition of base addresses
OMAP4: PRM: Remove MPU internal code name and apply PRCM naming convention
OMAP4: CM: Remove non-functional registers in ES1.0
OMAP: hwmod: Replace WARN by pr_warning for clockdomain check
OMAP: hwmod: Rename hwmod name for the MPU
OMAP: hwmod: Do not exit the iteration if one clock init failed
OMAP: hwmod: Replace WARN by pr_warning if clock lookup failed
OMAP: hwmod: Remove IS_ERR check with omap_clk_get_by_name return value
OMAP: hwmod: Fix wrong pointer iteration in oh->slaves
...
Linus Torvalds [Fri, 21 May 2010 17:49:43 +0000 (10:49 -0700)]
Merge branch 'i2c-for-linus' of git://git./linux/kernel/git/jdelvare/staging
* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
i2c-nforce2: Remove redundant error messages on ACPI conflict
i2c: Use <linux/io.h> instead of <asm/io.h>
i2c-algo-pca: Fix coding style issues
i2c-dev: Fix all coding style issues
i2c-core: Fix some coding style issues
i2c-gpio: Move initialization code to subsys_initcall()
i2c-parport: Make template structure const
i2c-dev: Remove unnecessary casts
at24: Fall back to byte or word reads if needed
i2c-stub: Expose the default functionality flags
i2c/scx200_acb: Make PCI device ids constant
i2c-i801: Fix all checkpatch warnings
i2c-i801: All newer devices have all the optional features
i2c-i801: Let the user disable selected driver features
Linus Torvalds [Fri, 21 May 2010 17:48:48 +0000 (10:48 -0700)]
Merge git://git./linux/kernel/git/gregkh/tty-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: (25 commits)
serial: Tidy REMOTE_DEBUG
serial: isicomm: handle running out of slots
serial: bfin_sport_uart: Use resource size to fix off-by-one error
tty: fix obsolete comment on tty_insert_flip_string_fixed_flag
serial: Add driver for the Altera UART
serial: Add driver for the Altera JTAG UART
serial: timbuart: make sure last byte is sent when port is closed
serial: two branches the same in timbuart_set_mctrl()
serial: uartlite: move from byte accesses to word accesses
tty: n_gsm: depends on NET
tty: n_gsm line discipline
serial: TTY: new ldiscs for staging
serial: bfin_sport_uart: drop redundant cpu depends
serial: bfin_sport_uart: drop the experimental markings
serial: bfin_sport_uart: pull in bfin_sport.h for SPORT defines
serial: bfin_sport_uart: only enable SPORT TX if data is to be sent
serial: bfin_sport_uart: drop useless status masks
serial: bfin_sport_uart: zero sport_uart_port if allocated dynamically
serial: bfin_sport_uart: protect changes to uart_port
serial: bfin_sport_uart: add support for CTS/RTS via GPIOs
...
Linus Torvalds [Fri, 21 May 2010 17:48:32 +0000 (10:48 -0700)]
Merge git://git./linux/kernel/git/gregkh/driver-core-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (38 commits)
net: Expose all network devices in a namespaces in sysfs
hotplug: netns aware uevent_helper
kobj: Send hotplug events in the proper namespace.
netlink: Implment netlink_broadcast_filtered
net/sysfs: Fix the bitrot in network device kobject namespace support
netns: Teach network device kobjects which namespace they are in.
kobject: Send hotplug events in all network namespaces
driver-core: fix Typo in drivers/base/core.c for CONFIG_MODULE
pci: check caps from sysfs file open to read device dependent config space
sysfs: add struct file* to bin_attr callbacks
sysfs: Remove usage of S_BIAS to avoid merge conflict with the vfs tree
sysfs: Don't use enums in inline function declaration.
sysfs-namespaces: add a high-level Documentation file
sysfs: Comment sysfs directory tagging logic
driver core: Implement ns directory support for device classes.
sysfs: Implement sysfs_delete_link
sysfs: Add support for tagged directories with untagged members.
sysfs: Implement sysfs tagged directory support.
kobj: Add basic infrastructure for dealing with namespaces.
sysfs: Remove double free sysfs_get_sb
...
Randy Dunlap [Fri, 21 May 2010 16:03:01 +0000 (09:03 -0700)]
interrupt.h: fix fatal kernel-doc error
Fix kernel-doc fatal error:
/** beginning a non-kernel-doc comment block:
(That alone does not kill kernel-doc, but the 'enum' was
totally confusing to it.)
Error(/lnx/src/TMP/linux-2.6.34-git6//include/linux/interrupt.h:88): cannot understand prototype: 'enum '
make[2]: *** [Documentation/DocBook/genericirq.xml] Error 1
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jiaying Zhang [Mon, 17 May 2010 16:36:03 +0000 (18:36 +0200)]
dquot: Detect partial write error to quota file in write_blk() and add printk_ratelimit for quota error messages
This patch changes quota_tree.c:write_blk() to detect error caused by partial
write to quota file and add a macro to limit control printed quota error
messages so we won't fill up dmesg with a corrupted quota file.
Signed-off-by: Jiaying Zhang <jiayingz@google.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Jan Kara [Thu, 13 May 2010 20:14:53 +0000 (22:14 +0200)]
ocfs2: Fix lock inversion in quotas during umount
We cannot cancel delayed work from ocfs2_local_free_info because that is called
with dqonoff_mutex held and the work it cancels requires dqonoff_mutex to
finish. Cancel the work before acquiring dqonoff_mutex.
Acked-by: Joel Becker <Joel.Becker@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Jan Kara [Thu, 13 May 2010 18:18:45 +0000 (20:18 +0200)]
ocfs2: Use __dquot_transfer to avoid lock inversion
dquot_transfer() acquires own references to dquots via dqget(). Thus it waits
for dq_lock which creates a lock inversion because dq_lock ranks above
transaction start but transaction is already started in ocfs2_setattr(). Fix
the problem by passing own references directly to __dquot_transfer.
Acked-by: Joel Becker <Joel.Becker@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Jan Kara [Thu, 13 May 2010 16:05:15 +0000 (18:05 +0200)]
ocfs2: Fix NULL pointer deref when writing local dquot
commit_dqblk() can write quota info to global file. That is actually a bad
thing to do because if we are just modifying local quota file, we are not
prepared (do not hold proper locks, do not have transaction credits) to do
a modification of the global quota file. So do not use commit_dqblk() and
instead call our writing function directly.
Acked-by: Joel Becker <Joel.Becker@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Jan Kara [Tue, 11 May 2010 15:04:14 +0000 (17:04 +0200)]
ocfs2: Fix estimate of credits needed for quota allocation
We were missing reservation of a journal credit for modification of quota
file inode when creating new dquot structure in the global quota file.
Acked-by: Joel Becker <Joel.Becker@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Jan Kara [Wed, 31 Mar 2010 14:25:37 +0000 (16:25 +0200)]
ocfs2: Fix quota locking
OCFS2 had three issues with quota locking:
a) When reading dquot from global quota file, we started a transaction while
holding dqio_mutex which is prone to deadlocks because other paths do it
the other way around
b) During ocfs2_sync_dquot we were not protected against concurrent writers
on the same node. Because we first copy data to local buffer, a race
could happen resulting in old data being written to global quota file and
thus causing quota inconsistency after a crash.
c) ip_alloc_sem of quota files was acquired while a transaction is started
in ocfs2_quota_write which can deadlock because we first get ip_alloc_sem
and then start a transaction when extending quota files.
We fix the problem a) by pulling all necessary code to ocfs2_acquire_dquot
and ocfs2_release_dquot. Thus we no longer depend on generic dquot_acquire
to do the locking and can force proper lock ordering.
Problems b) and c) are fixed by locking i_mutex and ip_alloc_sem of
global quota file in ocfs2_lock_global_qf and removing ip_alloc_sem from
ocfs2_quota_read and ocfs2_quota_write.
Acked-by: Joel Becker <Joel.Becker@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Jan Kara [Wed, 28 Apr 2010 17:04:29 +0000 (19:04 +0200)]
ocfs2: Avoid unnecessary block mapping when refreshing quota info
The position of global quota file info does not change. So we do not have
to do logical -> physical block translation every time we reread it from
disk. Thus we can also avoid taking ip_alloc_sem.
Acked-by: Joel Becker <Joel.Becker@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Jan Kara [Tue, 27 Apr 2010 22:22:30 +0000 (00:22 +0200)]
ocfs2: Do not map blocks from local quota file on each write
There is no need to map offset of local dquot structure to on disk block
in each quota write. It is enough to map it just once and store the physical
block number in quota structure in memory. Moreover this simplifies locking
as we do not have to take ip_alloc_sem from quota write path.
Acked-by: Joel Becker <Joel.Becker@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Jan Kara [Thu, 13 May 2010 17:58:50 +0000 (19:58 +0200)]
quota: Refactor dquot_transfer code so that OCFS2 can pass in its references
Currently, __dquot_transfer() acquires its own references of dquot structures
that will be put into inode. But for OCFS2, this creates a lock inversion
between dq_lock (waited on in dqget) and transaction start (started in
ocfs2_setattr). Currently, deadlock is impossible because dq_lock is acquired
only during dquot_acquire and dquot_release and we already hold a reference to
dquot structures in ocfs2_setattr so neither of these functions can be called
while we call dquot_transfer. But this is rather subtle and it is hard to teach
lockdep about it. So provide __dquot_transfer function that can be passed dquot
references directly. OCFS2 can then pass acquired dquot references directly to
__dquot_transfer with proper locking.
Signed-off-by: Jan Kara <jack@suse.cz>
Dmitry Monakhov [Thu, 8 Apr 2010 18:04:20 +0000 (22:04 +0400)]
quota: unify quota init condition in setattr
Quota must being initialized if size or uid/git changes requested.
But initialization performed in two different places:
in case of i_size file system is responsible for dquot init
, but in case of uid/gid init will be called internally in
dquot_transfer().
This ambiguity makes code harder to understand.
Let's move this logic to one common helper function.
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Christoph Hellwig [Fri, 7 May 2010 16:35:40 +0000 (12:35 -0400)]
quota: remove sb_has_quota_active in get/set_info
The methods already do these checks, so remove them in the quotactl
implementation to allow non-VFS quota implementations to also support
these calls.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Christoph Hellwig [Thu, 6 May 2010 21:05:17 +0000 (17:05 -0400)]
quota: unify ->set_dqblk
Pass the larger struct fs_disk_quota to the ->set_dqblk operation so
that the Q_SETQUOTA and Q_XSETQUOTA operations can be implemented
with a single filesystem operation and we can retire the ->set_xquota
operation. The additional information (RT-subvolume accounting and
warn counts) are left zero for the VFS quota implementation.
Add new fieldmask values for setting the numer of blocks and inodes
values which is required for the VFS quota, but wasn't for XFS.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Christoph Hellwig [Thu, 6 May 2010 21:04:58 +0000 (17:04 -0400)]
quota: unify ->get_dqblk
Pass the larger struct fs_disk_quota to the ->get_dqblk operation so
that the Q_GETQUOTA and Q_XGETQUOTA operations can be implemented
with a single filesystem operation and we can retire the ->get_xquota
operation. The additional information (RT-subvolume accounting and
warn counts) are left zero for the VFS quota implementation.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Eric Sandeen [Fri, 30 Apr 2010 16:09:34 +0000 (11:09 -0500)]
ext3: make barrier options consistent with ext4
ext4 was updated to accept barrier/nobarrier mount options
in addition to the older barrier=0/1. The barrier story
is complex enough, we should help people by making the options
the same at least, even if the defaults are different.
This patch allows the barrier/nobarrier mount options for ext3,
while keeping nobarrier the default.
It also unconditionally displays barrier status in show_options,
and prints a message at mount time if barriers are not enabled,
just as ext4 does.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Dmitry Monakhov [Mon, 26 Apr 2010 16:03:33 +0000 (20:03 +0400)]
quota: Make quota stat accounting lockless.
Quota stats is mostly writable data structure. Let's alloc percpu
bucket for each value.
NOTE: dqstats_read() function is racy against dqstats_{inc,dec}
and may return inconsistent value. But this is ok since absolute
accuracy is not required.
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Sergey Senozhatsky [Mon, 26 Apr 2010 10:09:26 +0000 (12:09 +0200)]
suppress warning: "quotatypes" defined but not used
Suppress compilation warning: "quotatypes" defined but not used.
quotatypes is used only when CONFIG_QUOTA_DEBUG or CONFIG_PRINT_QUOTA_WARNING
is/are defined.
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Jan Kara [Thu, 15 Apr 2010 20:24:26 +0000 (22:24 +0200)]
ext3: Fix waiting on transaction during fsync
log_start_commit() returns 1 only when it started a transaction
commit. Thus in case transaction commit is already running, we
fail to wait for the commit to finish. Fix the issue by always
waiting for the commit regardless of the log_start_commit return
value.
Signed-off-by: Jan Kara <jack@suse.cz>
Jan Kara [Thu, 15 Apr 2010 20:16:24 +0000 (22:16 +0200)]
jbd: Provide function to check whether transaction will issue data barrier
Provide a function which returns whether a transaction with given tid
will send a barrier to the filesystem device. The function will be used
by ext3 to detect whether fsync needs to send a separate barrier or not.
Signed-off-by: Jan Kara <jack@suse.cz>
Dmitry Monakhov [Wed, 14 Apr 2010 22:56:58 +0000 (00:56 +0200)]
ufs: add ufs speciffic ->setattr call
generic setattr not longer responsible for quota transfer.
use ufs_setattr for all ufs's inodes.
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Jan Blunck [Wed, 14 Apr 2010 12:38:39 +0000 (14:38 +0200)]
BKL: Remove BKL from ext2 filesystem
The BKL is still used in ext2_put_super(), ext2_fill_super(), ext2_sync_fs()
ext2_remount() and ext2_write_inode(). From these calls ext2_put_super(),
ext2_fill_super() and ext2_remount() are protected against each other by
the struct super_block s_umount rw semaphore. The call in ext2_write_inode()
could only protect the modification of the ext2_sb_info through
ext2_update_dynamic_rev() against concurrent ext2_sync_fs() or ext2_remount().
ext2_fill_super() and ext2_put_super() can be left out because you need a
valid filesystem reference in all three cases, which you do not have when
you are one of these functions.
If the BKL is only protecting the modification of the ext2_sb_info it can
safely be removed since this is protected by the struct ext2_sb_info s_lock.
Signed-off-by: Jan Blunck <jblunck@suse.de>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Jan Kara <jack@suse.cz>
Jan Blunck [Wed, 14 Apr 2010 12:38:38 +0000 (14:38 +0200)]
ext2: Add ext2_sb_info s_lock spinlock
Add a spinlock that protects against concurrent modifications of
s_mount_state, s_blocks_last, s_overhead_last and the content of the
superblock's buffer pointed to by sbi->s_es. The spinlock is now used in
ext2_xattr_update_super_block() which was setting the
EXT2_FEATURE_COMPAT_EXT_ATTR flag on the superblock without protection
before. Likewise the spinlock is used in ext2_show_options() to have a
consistent view of the mount options.
This is a preparation patch for removing the BKL from ext2 in the next
patch.
Signed-off-by: Jan Blunck <jblunck@suse.de>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Jan Kara <jack@suse.cz>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Jan Kara <jack@suse.cz>
Jan Blunck [Wed, 14 Apr 2010 12:38:37 +0000 (14:38 +0200)]
ext2: Move ext2_write_super() out of ext2_setup_super()
Move ext2_write_super() out of ext2_setup_super() as a preparation for the
next patch that adds a new lock for superblock fields.
Signed-off-by: Jan Blunck <jblunck@suse.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Jan Blunck [Wed, 14 Apr 2010 12:38:36 +0000 (14:38 +0200)]
ext2: Fold ext2_commit_super() into ext2_sync_super()
Both function originally did similar things except that ext2_sync_super()
is returning after the call to sync_dirty_buffer(sbh). Therefore this
patch adds a wait flag to tell ext2_sync_super() if it has to call
sync_dirty_buffer() to wait for in-progress I/O to finish.
Signed-off-by: Jan Blunck <jblunck@suse.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Jan Blunck [Wed, 14 Apr 2010 12:38:35 +0000 (14:38 +0200)]
ext2: Remove duplicate code from ext2_sync_fs()
Depending in the state (valid or unchecked) of the filesystem either
ext2_sync_super() or ext2_commit_super() is called. If the filesystem is
currently valid (it is checked), we first mark it unchecked and afterwards
duplicate the work that ext2_sync_super() is doing later. Therefore this
patch removes the duplicate code and calls ext2_sync_super() directly after
marking the filesystem unchecked.
Signed-off-by: Jan Blunck <jblunck@suse.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Jan Blunck [Wed, 14 Apr 2010 12:38:34 +0000 (14:38 +0200)]
ext2: Set the write time in ext2_sync_fs()
This is probably a typo since the write time should actually be updated by
ext2_sync_fs() instead of the mount time.
Signed-off-by: Jan Blunck <jblunck@suse.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Jan Blunck [Wed, 14 Apr 2010 12:38:33 +0000 (14:38 +0200)]
ext2: Use ext2_clear_super_error() in ext2_sync_fs()
ext2_sync_fs() used to duplicate the code from ext2_clear_super_error().
Signed-off-by: Jan Blunck <jblunck@suse.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Dmitry Monakhov [Mon, 12 Apr 2010 19:46:00 +0000 (23:46 +0400)]
ext3: init statistics after journal recovery v2
Currently block/inode/dir counters are initialized before journal was
recovered. In fact after journal recovery this info will probably
change which results in incorrect numbers returned from statfs(2).
BUG:#15768
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Francis Moreau [Thu, 8 Apr 2010 09:35:17 +0000 (11:35 +0200)]
ext2: remove useless call to brelse() in ext2_free_inode()
This patch removes a useless call to brelse(bitmap_bh) since at that
point bitmap_bh is NULL and slightly cleans up bitmap_bh handling.
Signed-off-by: Francis Moreau <francis.moro@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Dmitry Monakhov [Sat, 27 Mar 2010 12:15:38 +0000 (15:15 +0300)]
quota: optimize mark_dirty logic
- Skip locking if quota is dirty already.
- Return old quota state to help fs-specciffic implementation to optimize
case where quota was dirty already.
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Jan Kara [Mon, 29 Mar 2010 11:55:39 +0000 (13:55 +0200)]
ext2: Avoid loading bitmaps for full groups during block allocation
There is no point in loading bitmap for groups which are completely full.
This causes noticeable performance problems (and memory pressure) on small
systems with large full filesystem
(http://marc.info/?l=linux-ext4&m=
126843108314310&w=2).
Port of the same ext3 patch.
Signed-off-by: Jan Kara <jack@suse.cz>
Frans van de Wiel [Mon, 15 Mar 2010 18:29:34 +0000 (19:29 +0100)]
ext3: Avoid loading bitmaps for full groups during block allocation
There is no point in loading bitmap for groups which are completely full.
This causes noticeable performance problems (and memory pressure) on small
systems with large full filesystem
(http://marc.info/?l=linux-ext4&m=
126843108314310&w=2).
Jan Kara: Added a comment and changed check to use cpu-endian value.
Signed-off-by: "Frans van de Wiel" <fvdw@fvdw.eu>
Signed-off-by: Jan Kara <jack@suse.cz>
Linus Torvalds [Fri, 21 May 2010 16:48:36 +0000 (09:48 -0700)]
Fix networking tree iscsi_tcp.c mis-merge
The removal of the 'waitqueue_active()' test in commit
d7d05548a6
("[SCSI] iscsi_tcp: fix relogin/shutdown hang") got incorrectly resolved
by David when he back-merged the main git tree into the networking tree
in commit
278554bd65 ("Merge branch 'master' of master.kernel.org:...").
There was a content conflict due to 'sock->sk->sk_sleep' being changed
into 'sk_sleep(sock->sk)' in the networking tree, but David didn't pick
up the iscsi change from the main tree.
Reported-by: James Bottomley <James.Bottomley@suse.de>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Chase Douglas [Fri, 21 May 2010 16:41:01 +0000 (18:41 +0200)]
i2c-nforce2: Remove redundant error messages on ACPI conflict
The ACPI subsystem strictly checks for resource conflicts. When there's
a conflict, it outputs a warning message with all the details needed to
properly diagnose the underlying issue. However, the i2c-nforce2 driver
also prints its own message. Not only is the message redundant, it is at
the KERN_ERR level, which overrides some bootsplash screens for no good
reason. This change removes the two lines that print out the error
messages.
Signed-off-by: Chase Douglas <chase.douglas@canonical.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
H Hartley Sweeten [Fri, 21 May 2010 16:41:01 +0000 (18:41 +0200)]
i2c: Use <linux/io.h> instead of <asm/io.h>
As warned by checkpatch.pl, <linux/io.h> should be used instead of
<asm/io.h>.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Farid Hammane [Fri, 21 May 2010 16:41:00 +0000 (18:41 +0200)]
i2c-algo-pca: Fix coding style issues
Fix up some coding style issues. i2c-algo-pca.c has been built
successfully after applying this patch and the binary object is
still exactly the same. Other issues found by checkpatch.pl were
voluntarily not fixed, either to keep readability, or because of
false positive errors.
Signed-off-by: Farid Hammane <farid.hammane@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Farid Hammane [Fri, 21 May 2010 16:40:59 +0000 (18:40 +0200)]
i2c-dev: Fix all coding style issues
Fix all coding style issues found by checkpatch.pl.
Signed-off-by: Farid Hammane <farid.hammane@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Farid Hammane [Fri, 21 May 2010 16:40:58 +0000 (18:40 +0200)]
i2c-core: Fix some coding style issues
Fix up coding style issues found by the checkpatch.pl tool.
Signed-off-by: Farid Hammane <farid.hammane@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Marek Szyprowski [Fri, 21 May 2010 16:40:58 +0000 (18:40 +0200)]
i2c-gpio: Move initialization code to subsys_initcall()
GPIO driven I2C bus can be used for controlling the PMIC chip. The
example of such configuration is Samsung Aquila board.
This patch moves initialization code to subsys_initcall() to ensure
that the i2c bus is available early so the regulators can be quickly
probed and available for other devices on their probe() call.
Such solution has been proposed by Mark Brown to fix the problem of
the regulators not beeing available on the peripheral device probe():
http://lists.infradead.org/pipermail/linux-arm-kernel/2010-March/011971.html
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Jean Delvare [Fri, 21 May 2010 16:40:57 +0000 (18:40 +0200)]
i2c-parport: Make template structure const
parport_algo_data is a template so it can be marked const.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
H Hartley Sweeten [Fri, 21 May 2010 16:40:57 +0000 (18:40 +0200)]
i2c-dev: Remove unnecessary casts
The private_data member of struct file is a void *, there is no need
to cast it.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Jean Delvare [Fri, 21 May 2010 16:40:57 +0000 (18:40 +0200)]
at24: Fall back to byte or word reads if needed
Increase the portability of the at24 driver by letting it read from
EEPROM chips connected to cheap SMBus controllers that support neither
raw I2C messages nor even I2C block reads. All SMBus controllers
should support either word reads or byte reads, so read support
becomes universal, much like with the legacy "eeprom" driver.
Obviously, this only works with EEPROM chips up to AT24C16, that use
8-bit offset addressing. 16-bit offset addressing is almost impossible
to support on SMBus controllers.
I did not add universal support for writes, as I had no immediate need
for this, but it could be added later if needed (with the same
performance issue as byte and word reads have, of course.)
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Konstantin Lazarev <klazarev@sbcglobal.net>
Jean Delvare [Fri, 21 May 2010 16:40:56 +0000 (18:40 +0200)]
i2c-stub: Expose the default functionality flags
It is easier to adjust the flags when you know their default value.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Mark M. Hoffman <mhoffman@lightlink.com>
Jean Delvare [Fri, 21 May 2010 16:40:56 +0000 (18:40 +0200)]
i2c/scx200_acb: Make PCI device ids constant
Make PCI device ids constant as we just did for many other i2c bus
drivers already.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Márton Németh <nm127@freemail.hu>
Ivo Manca [Fri, 21 May 2010 16:40:55 +0000 (18:40 +0200)]
i2c-i801: Fix all checkpatch warnings
Fix all checkpatch warnings. No functional changes are made.
Signed-off-by: Ivo Manca <pinkel@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Jean Delvare [Fri, 21 May 2010 16:40:55 +0000 (18:40 +0200)]
i2c-i801: All newer devices have all the optional features
Only the oldest devices lack some of the features supported by this
driver. List them explicitly, and default to all features enabled for
all other chips, including the ones added through sysfs. This will
make future driver maintenance easier.
In the unlikely event of a not yet supported device not implementing
all the features, one can always use the disable_features module
parameter to prevent the driver from attempting to use them.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Seth Heasley <seth.heasley@intel.com>
Jean Delvare [Fri, 21 May 2010 16:40:54 +0000 (18:40 +0200)]
i2c-i801: Let the user disable selected driver features
Let the user disable selected features normally supported by the
device. This makes it possible to work around possible driver or
hardware bugs if the feature in question doesn't work as intended
for whatever reason.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Felix Rubinstein <felixru@gmail.com>
Eric W. Biederman [Wed, 5 May 2010 00:36:49 +0000 (17:36 -0700)]
net: Expose all network devices in a namespaces in sysfs
This reverts commit
aaf8cdc34ddba08122f02217d9d684e2f9f5d575.
Drivers like the ipw2100 call device_create_group when they
are initialized and device_remove_group when they are shutdown.
Moving them between namespaces deletes their sysfs groups early.
In particular the following call chain results.
netdev_unregister_kobject -> device_del -> kobject_del -> sysfs_remove_dir
With sysfs_remove_dir recursively deleting all of it's subdirectories,
and nothing adding them back.
Ouch!
Therefore we need to call something that ultimate calls sysfs_mv_dir
as that sysfs function can move sysfs directories between namespaces
without deleting their subdirectories or their contents. Allowing
us to avoid placing extra boiler plate into every driver that does
something interesting with sysfs.
Currently the function that provides that capability is device_rename.
That is the code works without nasty side effects as originally written.
So remove the misguided fix for moving devices between namespaces. The
bug in the kobject layer that inspired it has now been recognized and
fixed.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Eric W. Biederman [Wed, 5 May 2010 00:36:48 +0000 (17:36 -0700)]
hotplug: netns aware uevent_helper
It only makes sense for uevent_helper to get events
in the intial namespaces. It's invocation is not
per namespace and it is not clear how we could make
it's invocation namespace aware.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Eric W. Biederman [Wed, 5 May 2010 00:36:47 +0000 (17:36 -0700)]
kobj: Send hotplug events in the proper namespace.
Utilize netlink_broacast_filtered to allow sending hotplug events
in the proper namespace.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Eric W. Biederman [Wed, 5 May 2010 00:36:46 +0000 (17:36 -0700)]
netlink: Implment netlink_broadcast_filtered
When netlink sockets are used to convey data that is in a namespace
we need a way to select a subset of the listening sockets to deliver
the packet to. For the network namespace we have been doing this
by only transmitting packets in the correct network namespace.
For data belonging to other namespaces netlink_bradcast_filtered
provides a mechanism that allows us to examine the destination
socket and to decide if we should transmit the specified packet
to it.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Eric W. Biederman [Mon, 17 May 2010 04:59:45 +0000 (21:59 -0700)]
net/sysfs: Fix the bitrot in network device kobject namespace support
I had a couple of stupid bugs in:
netns: Teach network device kobjects which namespace they are in.
- I duplicated the Kconfig for the NET_NS
- The build was broken when sysfs was not compiled in
The sysfs breakage is because after I moved the operations
for the sysfs to the kobject layer, to make things cleaner
I forgot to move the ifdefs. Opps.
I'm not quite certain how I got introduced a second NET_NS Kconfig,
but it was probably a 3 way merge somewhere along the way that
did not notice that the NET_NS Kconfig option had mvoed and thout
that was a bug. It probably slipped in because it used to be the
sysfs patches were the first patches in my network namespace patches.
Some things just don't go like you would expect.
Neither of these bugs actually affect anything in the common case
but they should be fixed.
Thanks to Serge for noticing they were present.
Reported-by: Serge E. Hallyn <serue@us.ibm.com>
Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com>
Acked-by: David S. Miller <davem@davemloft.net>
Eric W. Biederman [Wed, 5 May 2010 00:36:45 +0000 (17:36 -0700)]
netns: Teach network device kobjects which namespace they are in.
The problem. Network devices show up in sysfs and with the network
namespace active multiple devices with the same name can show up in
the same directory, ouch!
To avoid that problem and allow existing applications in network namespaces
to see the same interface that is currently presented in sysfs, this
patch enables the tagging directory support in sysfs.
By using the network namespace pointers as tags to separate out the
the sysfs directory entries we ensure that we don't have conflicts
in the directories and applications only see a limited set of
the network devices.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Eric W. Biederman [Wed, 5 May 2010 00:36:44 +0000 (17:36 -0700)]
kobject: Send hotplug events in all network namespaces
Open a copy of the uevent kernel socket in each network
namespace so we can send uevents in all network namespaces.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Christoph Egger [Mon, 17 May 2010 14:57:58 +0000 (16:57 +0200)]
driver-core: fix Typo in drivers/base/core.c for CONFIG_MODULE
In this code section the final S of CONFIG_MODULES was missed making
the whole check useless
Signed-off-by: Christoph Egger <siccegge@cs.fau.de>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Chris Wright [Thu, 13 May 2010 17:43:07 +0000 (10:43 -0700)]
pci: check caps from sysfs file open to read device dependent config space
The PCI config space bin_attr read handler has a hardcoded CAP_SYS_ADMIN
check to verify privileges before allowing a user to read device
dependent config space. This is meant to protect from an unprivileged
user potentially locking up the box.
When assigning a PCI device directly to a guest with libvirt and KVM,
the sysfs config space file is chown'd to the unprivileged user that
the KVM guest will run as. The guest needs to have full access to the
device's config space since it's responsible for driving the device.
However, despite being the owner of the sysfs file, the CAP_SYS_ADMIN
check will not allow read access beyond the config header.
With this patch we check privileges against the capabilities used when
openining the sysfs file. The allows a privileged process to open the
file and hand it to an unprivileged process, and the unprivileged process
can still read all of the config space.
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Chris Wright [Thu, 13 May 2010 01:28:57 +0000 (18:28 -0700)]
sysfs: add struct file* to bin_attr callbacks
This allows bin_attr->read,write,mmap callbacks to check file specific data
(such as inode owner) as part of any privilege validation.
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Eric W. Biederman [Tue, 18 May 2010 19:58:33 +0000 (12:58 -0700)]
sysfs: Remove usage of S_BIAS to avoid merge conflict with the vfs tree
In Al's latest vfs tree the code is reworked and S_BIAS has been removed.
It turns out that checking to see if a super block is in the
middle of an unmount in sysfs_exit_ns is unnecessary because we
remove the super_block from the s_supers/s_instances list before
struct sysfs_super_info pointed to by sb->s_fs_info is freed.
For now just delete the unnecessary check to see if a superblock is in the
middle of an unmount, it isn't necessary with or without Al's changes
and it just causes a needless conflict.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Eric W. Biederman [Wed, 5 May 2010 21:54:00 +0000 (14:54 -0700)]
sysfs: Don't use enums in inline function declaration.
It appears gcc can't cope with using an enum that is only declared in
an inline function declaration, that doesn't even use the variable
that is so declared.
Avoid the silliness and replace the enum with an int, and make gcc
happy.
Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Serge E. Hallyn [Wed, 5 May 2010 02:45:38 +0000 (21:45 -0500)]
sysfs-namespaces: add a high-level Documentation file
The first three paragraphs are almost verbatim taken from Eric's
commit message on the patch introducing network ns tags. The next
two paragraphs I wrote to be a brief high level overview. The last
section is taken from the commit message on "Implement sysfs tagged
directory support", but updated. Hopefully correctly.
Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Serge E. Hallyn [Mon, 3 May 2010 21:23:15 +0000 (16:23 -0500)]
sysfs: Comment sysfs directory tagging logic
Add some in-line comments to explain the new infrastructure, which
was introduced to support sysfs directory tagging with namespaces.
I think an overall description someplace might be good too, but it
didn't really seem to fit into Documentation/filesystems/sysfs.txt,
which appears more geared toward users, rather than maintainers, of
sysfs.
(Tejun, please let me know if I can make anything clearer or failed
altogether to comment something that should be commented.)
Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Eric W. Biederman [Tue, 30 Mar 2010 18:31:29 +0000 (11:31 -0700)]
driver core: Implement ns directory support for device classes.
device_del and device_rename were modified to use
sysfs_delete_link and sysfs_rename_link respectively to ensure
when these operations happen on devices whose classes
are in namespace directories they work properly.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Eric W. Biederman [Tue, 30 Mar 2010 18:31:28 +0000 (11:31 -0700)]
sysfs: Implement sysfs_delete_link
When removing a symlink sysfs_remove_link does not provide
enough information to figure out which tagged directory the symlink
falls in. So I need sysfs_delete_link which is passed the target
of the symlink to delete.
sysfs_rename_link is updated to call sysfs_delete_link instead
of sysfs_remove_link as we have all of the information necessary
and the callers are interesting.
Both of these functions now have enough information to find a symlink
in a tagged directory. The only restriction is that they must be called
before the target kobject is renamed or deleted. If they are called
later I loose track of which tag the target kobject was marked with
and can no longer find the old symlink to remove it.
This patch was split from an earlier patch.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Eric W. Biederman [Tue, 30 Mar 2010 18:31:27 +0000 (11:31 -0700)]
sysfs: Add support for tagged directories with untagged members.
I had hopped to avoid this but the bonding driver adds a file
to /sys/class/net/ and the easiest way to handle that file is
to make it untagged and to register it only once.
So relax the rules on tagged directories, and make bonding work.
Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
projects / kernel / kernel-generic.git / log