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b_entry_name and buffer are initially NULL, are initialized within a loop
to the result of calling kmalloc, and are freed at the bottom of this loop.
The loop contains gotos to cleanup, which also frees b_entry_name and
buffer. Some of these gotos are before the reinitializations of
b_entry_name and buffer. To maintain the invariant that b_entry_name and
buffer are NULL at the top of the loop, and thus acceptable arguments to
kfree, these variables are now set to NULL after the kfrees.
This seems to be the simplest solution. A more complicated solution
would be to introduce more labels in the error handling code at the end of
the function.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@r@
identifier E;
expression E1;
iterator I;
statement S;
@@
*kfree(E);
... when != E = E1
when != I(E,...) S
when != &E
*kfree(E);
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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sparc64 allmodconfig:
fs/ext4/super.c: In function `lifetime_write_kbytes_show':
fs/ext4/super.c:2174: warning: long long unsigned int format, long unsigned int arg (arg 4)
fs/ext4/super.c:2174: warning: long long unsigned int format, long unsigned int arg (arg 4)
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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This is a bit complicated because we are trying to optimize when we
send barriers to the fs data disk. We could just throw in an extra
barrier to the data disk whenever we send a barrier to the journal
disk, but that's not always strictly necessary.
We only need to send a barrier during a commit when there are data
blocks which are must be written out due to an inode written in
ordered mode, or if fsync() depends on the commit to force data blocks
to disk. Finally, before we drop transactions from the beginning of
the journal during a checkpoint operation, we need to guarantee that
any blocks that were flushed out to the data disk are firmly on the
rust platter before we drop the transaction from the journal.
Thanks to Oleg Drokin for pointing out this flaw in ext3/ext4.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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This patch fixes the Kernel BZ #14286. When the address of an extent
corresponding to a valid block is corrupted, a -EIO should be reported
instead of a BUG(). This situation should not normally not occur
except in the case of a corrupted filesystem. If however it does,
then the system should not panic directly but depending on the mount
time options appropriate action should be taken. If the mount options
so permit, the I/O should be gracefully aborted by returning a -EIO.
http://bugzilla.kernel.org/show_bug.cgi?id=14286
Signed-off-by: Surbhi Palande <surbhi.palande@canonical.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Add module aliases for ext2 and ext3 when CONFIG_EXT4_USE_FOR_EXT23 is
set. This makes the existing user-space stuff like mkinitrd working
as is.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Don't offer to build ext2/3 support into ext4 if ext4 itself is not
configured on.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Remove unused #include <linux/version.h>('s) in
fs/ext4/block_validity.c
fs/ext4/mballoc.h
Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2:
ocfs2/trivial: Use le16_to_cpu for a disk value in xattr.c
ocfs2/trivial: Use proper mask for 2 places in hearbeat.c
Ocfs2: Let ocfs2 support fiemap for symlink and fast symlink.
Ocfs2: Should ocfs2 support fiemap for S_IFDIR inode?
ocfs2: Use FIEMAP_EXTENT_SHARED
fiemap: Add new extent flag FIEMAP_EXTENT_SHARED
ocfs2: replace u8 by __u8 in ocfs2_fs.h
ocfs2: explicit declare uninitialized var in user_cluster_connect()
ocfs2-devel: remove redundant OCFS2_MOUNT_POSIX_ACL check in ocfs2_get_acl_nolock()
ocfs2: return -EAGAIN instead of EAGAIN in dlm
ocfs2/cluster: Make fence method configurable - v2
ocfs2: Set MS_POSIXACL on remount
ocfs2: Make acl use the default
ocfs2: Always include ACL support
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In ocfs2_value_metas_in_xattr_header, we should Use
le16_to_cpu for ocfs2_extent_list.l_next_free_rec.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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I just noticed today that there are 2 places of "mlog(0,...)"
in fs/ocfs2/cluster/heartbeat.c, but actually have no default
mask prefix in that file.
So change them to mlog(ML_HEARTBEAT,...).
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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For fast symlink, it can be treated the same as inlined files since
the data extent we want to return of both case all were stored in
metadata block. For symlink, it can be simply treated the same as we
did for regular files.
Signed-off-by: Tristan Ye <tristan.ye@oracle.com>
Acked-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6:
devtmpfs: unlock mutex in case of string allocation error
Driver core: export platform_device_register_data as a GPL symbol
driver core: Prevent reference to freed memory on error path
Driver-core: Fix bogus 0 error return in device_add()
Driver core: driver_attribute parameters can often be const*
Driver core: bin_attribute parameters can often be const*
Driver core: device_attribute parameters can often be const*
Doc/stable rules: add new cherry-pick logic
vfs: get_sb_single() - do not pass options twice
devtmpfs: Convert dirlock to a mutex
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git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2:
ocfs2: Set i_nlink properly during reflink.
ocfs2: Add reflinked file's inode to inode hash eariler.
ocfs2: refcounttree.c cleanup.
ocfs2: Find proper end cpos for a leaf refcount block.
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Many struct bin_attribute descriptors are purely read-only
structures, and there's no need to change them. Therefore
make the promise not to, which will let those descriptors
be put in a ro section.
Signed-off-by: Phil Carmody <ext-phil.2.carmody@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Filesystem code usually destroys the option buffer while
parsing it. This leads to errors when the same buffer is
passed twice. In case we fill a new superblock do not call
remount.
This is needed to quite a warning that the debugfs code
causes every boot.
Cc: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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When we are asked for vfsv0 quota format and the file is in vfsv1
format (or vice versa), refuse to use the quota file. Also return
with error when we don't like the header of quota file.
Signed-off-by: Jan Kara <jack@suse.cz>
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jbd-debug and jbd2-debug is currently read-only (S_IRUGO), which is not
correct. Make it writable so that we can start debuging.
Signed-off-by: Yin Kangkai <kangkai.yin@intel.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jan Kara <jack@suse.cz>
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Unlock i_block_reservation_lock before vfs_dq_reserve_block().
This patch fixes http://bugzilla.kernel.org/show_bug.cgi?id=14739
CC: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jan Kara <jack@suse.cz>
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We have to delay vfs_dq_claim_space() until allocation context destruction.
Currently we have following call-trace:
ext4_mb_new_blocks()
/* task is already holding ac->alloc_semp */
->ext4_mb_mark_diskspace_used
->vfs_dq_claim_space() /* acquire dqptr_sem here. Possible deadlock */
->ext4_mb_release_context() /* drop ac->alloc_semp here */
Let's move quota claiming to ext4_da_update_reserve_space()
=======================================================
[ INFO: possible circular locking dependency detected ]
2.6.32-rc7 #18
-------------------------------------------------------
write-truncate-/3465 is trying to acquire lock:
(&s->s_dquot.dqptr_sem){++++..}, at: [<c025e73b>] dquot_claim_space+0x3b/0x1b0
but task is already holding lock:
(&meta_group_info[i]->alloc_sem){++++..}, at: [<c02ce962>] ext4_mb_load_buddy+0xb2/0x370
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&meta_group_info[i]->alloc_sem){++++..}:
[<c017d04b>] __lock_acquire+0xd7b/0x1260
[<c017d5ea>] lock_acquire+0xba/0xd0
[<c0527191>] down_read+0x51/0x90
[<c02ce962>] ext4_mb_load_buddy+0xb2/0x370
[<c02d0c1c>] ext4_mb_free_blocks+0x46c/0x870
[<c029c9d3>] ext4_free_blocks+0x73/0x130
[<c02c8cfc>] ext4_ext_truncate+0x76c/0x8d0
[<c02a8087>] ext4_truncate+0x187/0x5e0
[<c01e0f7b>] vmtruncate+0x6b/0x70
[<c022ec02>] inode_setattr+0x62/0x190
[<c02a2d7a>] ext4_setattr+0x25a/0x370
[<c022ee81>] notify_change+0x151/0x340
[<c021349d>] do_truncate+0x6d/0xa0
[<c0221034>] may_open+0x1d4/0x200
[<c022412b>] do_filp_open+0x1eb/0x910
[<c021244d>] do_sys_open+0x6d/0x140
[<c021258e>] sys_open+0x2e/0x40
[<c0103100>] sysenter_do_call+0x12/0x32
-> #2 (&ei->i_data_sem){++++..}:
[<c017d04b>] __lock_acquire+0xd7b/0x1260
[<c017d5ea>] lock_acquire+0xba/0xd0
[<c0527191>] down_read+0x51/0x90
[<c02a5787>] ext4_get_blocks+0x47/0x450
[<c02a74c1>] ext4_getblk+0x61/0x1d0
[<c02a7a7f>] ext4_bread+0x1f/0xa0
[<c02bcddc>] ext4_quota_write+0x12c/0x310
[<c0262d23>] qtree_write_dquot+0x93/0x120
[<c0261708>] v2_write_dquot+0x28/0x30
[<c025d3fb>] dquot_commit+0xab/0xf0
[<c02be977>] ext4_write_dquot+0x77/0x90
[<c02be9bf>] ext4_mark_dquot_dirty+0x2f/0x50
[<c025e321>] dquot_alloc_inode+0x101/0x180
[<c029fec2>] ext4_new_inode+0x602/0xf00
[<c02ad789>] ext4_create+0x89/0x150
[<c0221ff2>] vfs_create+0xa2/0xc0
[<c02246e7>] do_filp_open+0x7a7/0x910
[<c021244d>] do_sys_open+0x6d/0x140
[<c021258e>] sys_open+0x2e/0x40
[<c0103100>] sysenter_do_call+0x12/0x32
-> #1 (&sb->s_type->i_mutex_key#7/4){+.+...}:
[<c017d04b>] __lock_acquire+0xd7b/0x1260
[<c017d5ea>] lock_acquire+0xba/0xd0
[<c0526505>] mutex_lock_nested+0x65/0x2d0
[<c0260c9d>] vfs_load_quota_inode+0x4bd/0x5a0
[<c02610af>] vfs_quota_on_path+0x5f/0x70
[<c02bc812>] ext4_quota_on+0x112/0x190
[<c026345a>] sys_quotactl+0x44a/0x8a0
[<c0103100>] sysenter_do_call+0x12/0x32
-> #0 (&s->s_dquot.dqptr_sem){++++..}:
[<c017d361>] __lock_acquire+0x1091/0x1260
[<c017d5ea>] lock_acquire+0xba/0xd0
[<c0527191>] down_read+0x51/0x90
[<c025e73b>] dquot_claim_space+0x3b/0x1b0
[<c02cb95f>] ext4_mb_mark_diskspace_used+0x36f/0x380
[<c02d210a>] ext4_mb_new_blocks+0x34a/0x530
[<c02c83fb>] ext4_ext_get_blocks+0x122b/0x13c0
[<c02a5966>] ext4_get_blocks+0x226/0x450
[<c02a5ff3>] mpage_da_map_blocks+0xc3/0xaa0
[<c02a6ed6>] ext4_da_writepages+0x506/0x790
[<c01de272>] do_writepages+0x22/0x50
[<c01d766d>] __filemap_fdatawrite_range+0x6d/0x80
[<c01d7b9b>] filemap_flush+0x2b/0x30
[<c02a40ac>] ext4_alloc_da_blocks+0x5c/0x60
[<c029e595>] ext4_release_file+0x75/0xb0
[<c0216b59>] __fput+0xf9/0x210
[<c0216c97>] fput+0x27/0x30
[<c02122dc>] filp_close+0x4c/0x80
[<c014510e>] put_files_struct+0x6e/0xd0
[<c01451b7>] exit_files+0x47/0x60
[<c0146a24>] do_exit+0x144/0x710
[<c0147028>] do_group_exit+0x38/0xa0
[<c0159abc>] get_signal_to_deliver+0x2ac/0x410
[<c0102849>] do_notify_resume+0xb9/0x890
[<c01032d2>] work_notifysig+0x13/0x21
other info that might help us debug this:
3 locks held by write-truncate-/3465:
#0: (jbd2_handle){+.+...}, at: [<c02e1f8f>] start_this_handle+0x38f/0x5c0
#1: (&ei->i_data_sem){++++..}, at: [<c02a57f6>] ext4_get_blocks+0xb6/0x450
#2: (&meta_group_info[i]->alloc_sem){++++..}, at: [<c02ce962>] ext4_mb_load_buddy+0xb2/0x370
stack backtrace:
Pid: 3465, comm: write-truncate- Not tainted 2.6.32-rc7 #18
Call Trace:
[<c0524cb3>] ? printk+0x1d/0x22
[<c017ac9a>] print_circular_bug+0xca/0xd0
[<c017d361>] __lock_acquire+0x1091/0x1260
[<c016bca2>] ? sched_clock_local+0xd2/0x170
[<c0178fd0>] ? trace_hardirqs_off_caller+0x20/0xd0
[<c017d5ea>] lock_acquire+0xba/0xd0
[<c025e73b>] ? dquot_claim_space+0x3b/0x1b0
[<c0527191>] down_read+0x51/0x90
[<c025e73b>] ? dquot_claim_space+0x3b/0x1b0
[<c025e73b>] dquot_claim_space+0x3b/0x1b0
[<c02cb95f>] ext4_mb_mark_diskspace_used+0x36f/0x380
[<c02d210a>] ext4_mb_new_blocks+0x34a/0x530
[<c02c601d>] ? ext4_ext_find_extent+0x25d/0x280
[<c02c83fb>] ext4_ext_get_blocks+0x122b/0x13c0
[<c016bca2>] ? sched_clock_local+0xd2/0x170
[<c016be60>] ? sched_clock_cpu+0x120/0x160
[<c016beef>] ? cpu_clock+0x4f/0x60
[<c0178fd0>] ? trace_hardirqs_off_caller+0x20/0xd0
[<c052712c>] ? down_write+0x8c/0xa0
[<c02a5966>] ext4_get_blocks+0x226/0x450
[<c016be60>] ? sched_clock_cpu+0x120/0x160
[<c016beef>] ? cpu_clock+0x4f/0x60
[<c017908b>] ? trace_hardirqs_off+0xb/0x10
[<c02a5ff3>] mpage_da_map_blocks+0xc3/0xaa0
[<c01d69cc>] ? find_get_pages_tag+0x16c/0x180
[<c01d6860>] ? find_get_pages_tag+0x0/0x180
[<c02a73bd>] ? __mpage_da_writepage+0x16d/0x1a0
[<c01dfc4e>] ? pagevec_lookup_tag+0x2e/0x40
[<c01ddf1b>] ? write_cache_pages+0xdb/0x3d0
[<c02a7250>] ? __mpage_da_writepage+0x0/0x1a0
[<c02a6ed6>] ext4_da_writepages+0x506/0x790
[<c016beef>] ? cpu_clock+0x4f/0x60
[<c016bca2>] ? sched_clock_local+0xd2/0x170
[<c016be60>] ? sched_clock_cpu+0x120/0x160
[<c016be60>] ? sched_clock_cpu+0x120/0x160
[<c02a69d0>] ? ext4_da_writepages+0x0/0x790
[<c01de272>] do_writepages+0x22/0x50
[<c01d766d>] __filemap_fdatawrite_range+0x6d/0x80
[<c01d7b9b>] filemap_flush+0x2b/0x30
[<c02a40ac>] ext4_alloc_da_blocks+0x5c/0x60
[<c029e595>] ext4_release_file+0x75/0xb0
[<c0216b59>] __fput+0xf9/0x210
[<c0216c97>] fput+0x27/0x30
[<c02122dc>] filp_close+0x4c/0x80
[<c014510e>] put_files_struct+0x6e/0xd0
[<c01451b7>] exit_files+0x47/0x60
[<c0146a24>] do_exit+0x144/0x710
[<c017b163>] ? lock_release_holdtime+0x33/0x210
[<c0528137>] ? _spin_unlock_irq+0x27/0x30
[<c0147028>] do_group_exit+0x38/0xa0
[<c017babb>] ? trace_hardirqs_on+0xb/0x10
[<c0159abc>] get_signal_to_deliver+0x2ac/0x410
[<c0102849>] do_notify_resume+0xb9/0x890
[<c0178fd0>] ? trace_hardirqs_off_caller+0x20/0xd0
[<c017b163>] ? lock_release_holdtime+0x33/0x210
[<c0165b50>] ? autoremove_wake_function+0x0/0x50
[<c017ba54>] ? trace_hardirqs_on_caller+0x134/0x190
[<c017babb>] ? trace_hardirqs_on+0xb/0x10
[<c0300ba4>] ? security_file_permission+0x14/0x20
[<c0215761>] ? vfs_write+0x131/0x190
[<c0214f50>] ? do_sync_write+0x0/0x120
[<c0103115>] ? sysenter_do_call+0x27/0x32
[<c01032d2>] work_notifysig+0x13/0x21
CC: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jan Kara <jack@suse.cz>
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Fix warnings:
fs/quota/quota_v2.c: In function ‘v2_read_file_info’:
fs/quota/quota_v2.c:123: warning: integer constant is too large for ‘long’ type
fs/quota/quota_v2.c:124: warning: integer constant is too large for ‘long’ type
Reported-by: Jerry Leo <jerryleo860202@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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Use a separate lock to protect s_groups_count and the other block
group descriptors which get changed via an on-line resize operation,
so we can stop overloading the use of lock_super().
Port of ext4 commit 32ed5058ce90024efcd811254b4b1de0468099df by
Theodore Ts'o <tytso@mit.edu>.
CC: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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Use a separate lock to protect the orphan list, so we can stop
overloading the use of lock_super().
Port of ext4 commit 3b9d4ed26680771295d904a6b83e88e620780893
by Theodore Ts'o <tytso@mit.edu>.
CC: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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The function ext3_mark_recovery_complete() is called from two call
paths: either (a) while mounting the filesystem, in which case there's
no danger of any other CPU calling write_super() until the mount is
completed, and (b) while remounting the filesystem read-write, in
which case the fs core has already locked the superblock. This also
allows us to take out a very vile unlock_super()/lock_super() pair in
ext3_remount().
Port of ext4 commit a63c9eb2ce6f5028da90f282798232c4f398ceb8 by
Theodore Ts'o <tytso@mit.edu>.
CC: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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ext3_fill_super() is no longer called by read_super(), and it is no
longer called with the superblock locked. The
unlock_super()/lock_super() is no longer present, so this comment is
entirely superfluous.
Port of ext4 commit 32ed5058ce90024efcd811254b4b1de0468099df by
Theodore Ts'o <tytso@mit.edu>.
CC: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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- for(..) { mark_dquot_dirty(); } -> mark_all_dquot_dirty()
- for(..) { dput(); } -> dqput_all()
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jan Kara <jack@suse.cz>
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This patch also fixes write vs chown race condition.
Acked-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jan Kara <jack@suse.cz>
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Currently inode_reservation is managed by fs itself and this
reservation is transfered on dquot_transfer(). This means what
inode_reservation must always be in sync with
dquot->dq_dqb.dqb_rsvspace. Otherwise dquot_transfer() will result
in incorrect quota(WARN_ON in dquot_claim_reserved_space() will be
triggered)
This is not easy because of complex locking order issues
for example http://bugzilla.kernel.org/show_bug.cgi?id=14739
The patch introduce quota reservation field for each fs-inode
(fs specific inode is used in order to prevent bloating generic
vfs inode). This reservation is managed by quota code internally
similar to i_blocks/i_bytes and may not be always in sync with
internal fs reservation.
Also perform some code rearrangement:
- Unify dquot_reserve_space() and dquot_reserve_space()
- Unify dquot_release_reserved_space() and dquot_free_space()
- Also this patch add missing warning update to release_rsv()
dquot_release_reserved_space() must call flush_warnings() as
dquot_free_space() does.
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jan Kara <jack@suse.cz>
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Quota code requires unlocked version of this function. Off course
we can just copy-paste the code, but copy-pasting is always an evil.
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jan Kara <jack@suse.cz>
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Currently all quota block reservation macros contains hardcoded "2"
aka MAXQUOTAS value. This is no good because in some places it is not
obvious to understand what does this digit represent. Let's introduce
new macro with self descriptive name.
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Jan Kara <jack@suse.cz>
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loff_t is a type that isn't entirely dependant upon 32 v 64bit choice
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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* pull ACC_MODE to fs.h; we have several copies all over the place
* nightmarish expression calculating f_mode by f_flags deserves a helper
too (OPEN_FMODE(flags))
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Just set f_flags when shoving struct file into nameidata; don't
postpone that until __dentry_open(). do_filp_open() has correct
value; lookup_instantiate_filp() doesn't - we lose the difference
between O_RDWR and 3 by that point.
We still set .intent.open.flags, so no fs code needs to be changed.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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It seems a couple places such as arch/ia64/kernel/perfmon.c and
drivers/infiniband/core/uverbs_main.c could use anon_inode_getfile()
instead of a private pseudo-fs + alloc_file(), if only there were a way
to get a read-only file. So provide this by having anon_inode_getfile()
create a read-only file if we pass O_RDONLY in flags.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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No driver uses SG_SET_TRANSFORM any more in Linux, since the ide-scsi
driver was removed in 2.6.29. The compat-ioctl cleanup series moved
the handling for this around, which broke building without CONFIG_BLOCK.
Just remove the code handling it for compat mode.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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When alloc_file() and init_file() were combined, the error handling of
mnt_clone_write() was taken into alloc_file() in a somewhat obfuscated
way. Since we don't use the error code for anything except warning,
we might as well warn directly without an extra variable.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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A typo in 12045a6ee9908b "nfsd: let "insecure" flag vary by
pseudoflavor" reversed the sense of the "insecure" flag.
Reported-by: Michael Guntsche <mike@it-loops.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (25 commits)
sched: Fix broken assertion
sched: Assert task state bits at build time
sched: Update task_state_arraypwith new states
sched: Add missing state chars to TASK_STATE_TO_CHAR_STR
sched: Move TASK_STATE_TO_CHAR_STR near the TASK_state bits
sched: Teach might_sleep() about preemptible RCU
sched: Make warning less noisy
sched: Simplify set_task_cpu()
sched: Remove the cfs_rq dependency from set_task_cpu()
sched: Add pre and post wakeup hooks
sched: Move kthread_bind() back to kthread.c
sched: Fix select_task_rq() vs hotplug issues
sched: Fix sched_exec() balancing
sched: Ensure set_task_cpu() is never called on blocked tasks
sched: Use TASK_WAKING for fork wakups
sched: Select_task_rq_fair() must honour SD_LOAD_BALANCE
sched: Fix task_hot() test order
sched: Fix set_cpu_active() in cpu_down()
sched: Mark boot-cpu active before smp_init()
sched: Fix cpu_clock() in NMIs, on !CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
...
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We create a file in orphan dir for reflink so that if there
is any error, we don't create any wrong dentry in the dir.
But actually the file in orphan dir should be i_nlink = 0
so that it can be replayed and freed successfully.
This patch first set i_nlink to 0 when creating the file in
orphan dir and then set it to 1(reflink now only works for
regular file) when we move it to the dest dir.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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We used to add reflinked file's inode to inode hash when
we add it to the dest dir. But actually there is a race.
Consider the following sequence.
1. reflink happens and create the inode in orphan dir.
2. reflink thread is scheduled out because of some io.
3. recovery begins to work and calls ocfs2_recover_orphans.
It calls ocfs2_iget and get a new inode and i_count = 1.
It calls iput then and delete inode. the buffer's
uptodate state is cleared.
This patch move insert_inode_hash to the create function so
that it can be found by step 3 and prevented from deleting
because i_count > 1.
This resolves the bug
http://oss.oracle.com/bugzilla/show_bug.cgi?id=1183.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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Let userspace have a chance to get the extent info of a
directory just like extN did.
Signed-off-by: Tristan Ye <tristan.ye@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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Adds FIEMAP_EXTENT_SHARED flag to refcounted extents.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Acked-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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This patch replaces date type 'u8' with '__u8', which follows the coding style of ocfs2_fs.h, and portable to user space
for ocfs2-tools.
Signed-off-by: Coly Li <coly.li@suse.de>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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This patch explicitly declares an uninitialized local variable in user_cluster_connect(), to remove a compiling warning.
Signed-off-by: Coly Li <coly.li@suse.de>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
Btrfs: make sure fallocate properly starts a transaction
Btrfs: make metadata chunks smaller
Btrfs: Show discard option in /proc/mounts
Btrfs: deny sys_link across subvolumes.
Btrfs: fail mount on bad mount options
Btrfs: don't add extent 0 to the free space cache v2
Btrfs: Fix per root used space accounting
Btrfs: Fix btrfs_drop_extent_cache for skip pinned case
Btrfs: Add delayed iput
Btrfs: Pass transaction handle to security and ACL initialization functions
Btrfs: Make truncate(2) more ENOSPC friendly
Btrfs: Make fallocate(2) more ENOSPC friendly
Btrfs: Avoid orphan inodes cleanup during committing transaction
Btrfs: Avoid orphan inodes cleanup while replaying log
Btrfs: Fix disk_i_size update corner case
Btrfs: Rewrite btrfs_drop_extents
Btrfs: Add btrfs_duplicate_item
Btrfs: Avoid superfluous tree-log writeout
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Introduce coredump parameter data structure (struct coredump_params) to
simplify binfmt->core_dump() arguments.
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Suggested-by: Ingo Molnar <mingo@elte.hu>
Cc: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Thanks to Roland who pointed out de_thread() issues.
Currently we add sub-threads to ->real_parent->children list. This buys
nothing but slows down do_wait().
With this patch ->children contains only main threads (group leaders).
The only complication is that forget_original_parent() should iterate over
sub-threads by hand, and de_thread() needs another list_replace() when it
changes ->group_leader.
Henceforth do_wait_thread() can never see task_detached() && !EXIT_DEAD
tasks, we can remove this check (and we can unify do_wait_thread() and
ptrace_do_wait()).
This change can confuse the optimistic search in mm_update_next_owner(),
but this is fixable and minor.
Perhaps badness() and oom_kill_process() should be updated, but they
should be fixed in any case.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Ratan Nalumasu <rnalumasu@gmail.com>
Cc: Vitaly Mayatskikh <vmayatsk@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: David Howells <dhowells@redhat.com>
Acked-by: Greg Ungerer <gerg@snapgear.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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It can happen that write does not use all the blocks allocated in
write_begin either because of some filesystem error (like ENOSPC) or
because page with data to write has been removed from memory. We truncate
these blocks so that we don't have dangling blocks beyond i_size.
Cc: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This reverts commit e4c570c4cb7a95dbfafa3d016d2739bf3fdfe319, as
requested by Alexey:
"I think I gave a good enough arguments to not merge it.
To iterate:
* patch makes impossible to start using ext3 on EXT3_FS=n kernels
without reboot.
* this is done only for one pointer on task_struct"
None of config options which define task_struct are tristate directly
or effectively."
Requested-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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ssh://master.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable into for-linus
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