| Commit message (Collapse) | Author | Age |
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This patch change mutex_lock to a new subclass and
add a new inode lock subclass for the target inode
which caused this lockdep warning.
=============================================
[ INFO: possible recursive locking detected ]
2.6.35+ #5
---------------------------------------------
reflink/11086 is trying to acquire lock:
(Meta){+++++.}, at: [<ffffffffa06f9d65>] ocfs2_reflink_ioctl+0x898/0x1229 [ocfs2]
but task is already holding lock:
(Meta){+++++.}, at: [<ffffffffa06f9aa0>] ocfs2_reflink_ioctl+0x5d3/0x1229 [ocfs2]
other info that might help us debug this:
6 locks held by reflink/11086:
#0: (&sb->s_type->i_mutex_key#15/1){+.+.+.}, at: [<ffffffff820e09ec>] lookup_create+0x26/0x97
#1: (&sb->s_type->i_mutex_key#15){+.+.+.}, at: [<ffffffffa06f99a0>] ocfs2_reflink_ioctl+0x4d3/0x1229 [ocfs2]
#2: (Meta){+++++.}, at: [<ffffffffa06f9aa0>] ocfs2_reflink_ioctl+0x5d3/0x1229 [ocfs2]
#3: (&oi->ip_xattr_sem){+.+.+.}, at: [<ffffffffa06f9b58>] ocfs2_reflink_ioctl+0x68b/0x1229 [ocfs2]
#4: (&oi->ip_alloc_sem){+.+.+.}, at: [<ffffffffa06f9b67>] ocfs2_reflink_ioctl+0x69a/0x1229 [ocfs2]
#5: (&sb->s_type->i_mutex_key#15/2){+.+...}, at: [<ffffffffa06f9d4f>] ocfs2_reflink_ioctl+0x882/0x1229 [ocfs2]
stack backtrace:
Pid: 11086, comm: reflink Not tainted 2.6.35+ #5
Call Trace:
[<ffffffff82063dd9>] validate_chain+0x56e/0xd68
[<ffffffff82062275>] ? mark_held_locks+0x49/0x69
[<ffffffff82064d6d>] __lock_acquire+0x79a/0x7f1
[<ffffffff82065a81>] lock_acquire+0xc6/0xed
[<ffffffffa06f9d65>] ? ocfs2_reflink_ioctl+0x898/0x1229 [ocfs2]
[<ffffffffa06c9ade>] __ocfs2_cluster_lock+0x975/0xa0d [ocfs2]
[<ffffffffa06f9d65>] ? ocfs2_reflink_ioctl+0x898/0x1229 [ocfs2]
[<ffffffffa06e107b>] ? ocfs2_wait_for_recovery+0x15/0x8a [ocfs2]
[<ffffffffa06cb6ea>] ocfs2_inode_lock_full_nested+0x1ac/0xdc5 [ocfs2]
[<ffffffffa06f9d65>] ? ocfs2_reflink_ioctl+0x898/0x1229 [ocfs2]
[<ffffffff820623a0>] ? trace_hardirqs_on_caller+0x10b/0x12f
[<ffffffff82060193>] ? debug_mutex_free_waiter+0x4f/0x53
[<ffffffffa06f9d65>] ocfs2_reflink_ioctl+0x898/0x1229 [ocfs2]
[<ffffffffa06ce24a>] ? ocfs2_file_lock_res_init+0x66/0x78 [ocfs2]
[<ffffffff820bb2d2>] ? might_fault+0x40/0x8d
[<ffffffffa06df9f6>] ocfs2_ioctl+0x61a/0x656 [ocfs2]
[<ffffffff820ee5d3>] ? mntput_no_expire+0x1d/0xb0
[<ffffffff820e07b3>] ? path_put+0x2c/0x31
[<ffffffff820e53ac>] vfs_ioctl+0x2a/0x9d
[<ffffffff820e5903>] do_vfs_ioctl+0x45d/0x4ae
[<ffffffff8233a7f6>] ? _raw_spin_unlock+0x26/0x2a
[<ffffffff8200299c>] ? sysret_check+0x27/0x62
[<ffffffff820e59ab>] sys_ioctl+0x57/0x7a
[<ffffffff8200296b>] system_call_fastpath+0x16/0x1b
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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As the name shows, we shouldn't have any lock in
ocfs2_xattr_get_nolock. so lift ip_xattr_sem to the caller.
This should be safe for us since the only 2 callers are:
1. ocfs2_xattr_get which will lock the resources.
2. ocfs2_mknod which don't need this locking.
And this also resolves the following lockdep warning.
=======================================================
[ INFO: possible circular locking dependency detected ]
2.6.35+ #5
-------------------------------------------------------
reflink/30027 is trying to acquire lock:
(&oi->ip_alloc_sem){+.+.+.}, at: [<ffffffffa0673b67>] ocfs2_reflink_ioctl+0x69a/0x1226 [ocfs2]
but task is already holding lock:
(&oi->ip_xattr_sem){++++..}, at: [<ffffffffa0673b58>] ocfs2_reflink_ioctl+0x68b/0x1226 [ocfs2]
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&oi->ip_xattr_sem){++++..}:
[<ffffffff82064d6d>] __lock_acquire+0x79a/0x7f1
[<ffffffff82065a81>] lock_acquire+0xc6/0xed
[<ffffffff82339650>] down_read+0x34/0x47
[<ffffffffa0691cb8>] ocfs2_xattr_get_nolock+0xa0/0x4e6 [ocfs2]
[<ffffffffa069d64f>] ocfs2_get_acl_nolock+0x5c/0x132 [ocfs2]
[<ffffffffa069d9c7>] ocfs2_init_acl+0x60/0x243 [ocfs2]
[<ffffffffa066499d>] ocfs2_mknod+0xae8/0xfea [ocfs2]
[<ffffffffa0665041>] ocfs2_create+0x9d/0x105 [ocfs2]
[<ffffffff820e1c83>] vfs_create+0x9b/0xf4
[<ffffffff820e20bb>] do_last+0x2fd/0x5be
[<ffffffff820e31c0>] do_filp_open+0x1fb/0x572
[<ffffffff820d6cf6>] do_sys_open+0x5a/0xe7
[<ffffffff820d6dac>] sys_open+0x1b/0x1d
[<ffffffff8200296b>] system_call_fastpath+0x16/0x1b
-> #2 (jbd2_handle){+.+...}:
[<ffffffff82064d6d>] __lock_acquire+0x79a/0x7f1
[<ffffffff82065a81>] lock_acquire+0xc6/0xed
[<ffffffffa0604ff8>] start_this_handle+0x4a3/0x4bc [jbd2]
[<ffffffffa06051d6>] jbd2__journal_start+0xba/0xee [jbd2]
[<ffffffffa0605218>] jbd2_journal_start+0xe/0x10 [jbd2]
[<ffffffffa065ca34>] ocfs2_start_trans+0xb7/0x19b [ocfs2]
[<ffffffffa06645f3>] ocfs2_mknod+0x73e/0xfea [ocfs2]
[<ffffffffa0665041>] ocfs2_create+0x9d/0x105 [ocfs2]
[<ffffffff820e1c83>] vfs_create+0x9b/0xf4
[<ffffffff820e20bb>] do_last+0x2fd/0x5be
[<ffffffff820e31c0>] do_filp_open+0x1fb/0x572
[<ffffffff820d6cf6>] do_sys_open+0x5a/0xe7
[<ffffffff820d6dac>] sys_open+0x1b/0x1d
[<ffffffff8200296b>] system_call_fastpath+0x16/0x1b
-> #1 (&journal->j_trans_barrier){.+.+..}:
[<ffffffff82064d6d>] __lock_acquire+0x79a/0x7f1
[<ffffffff82064fa9>] lock_release_non_nested+0x1e5/0x24b
[<ffffffff82065999>] lock_release+0x158/0x17a
[<ffffffff823389f6>] __mutex_unlock_slowpath+0xbf/0x11b
[<ffffffff82338a5b>] mutex_unlock+0x9/0xb
[<ffffffffa0679673>] ocfs2_free_ac_resource+0x31/0x67 [ocfs2]
[<ffffffffa067c6bc>] ocfs2_free_alloc_context+0x11/0x1d [ocfs2]
[<ffffffffa0633de0>] ocfs2_write_begin_nolock+0x141e/0x159b [ocfs2]
[<ffffffffa0635523>] ocfs2_write_begin+0x11e/0x1e7 [ocfs2]
[<ffffffff820a1297>] generic_file_buffered_write+0x10c/0x210
[<ffffffffa0653624>] ocfs2_file_aio_write+0x4cc/0x6d3 [ocfs2]
[<ffffffff820d822d>] do_sync_write+0xc2/0x106
[<ffffffff820d897b>] vfs_write+0xae/0x131
[<ffffffff820d8e55>] sys_write+0x47/0x6f
[<ffffffff8200296b>] system_call_fastpath+0x16/0x1b
-> #0 (&oi->ip_alloc_sem){+.+.+.}:
[<ffffffff82063f92>] validate_chain+0x727/0xd68
[<ffffffff82064d6d>] __lock_acquire+0x79a/0x7f1
[<ffffffff82065a81>] lock_acquire+0xc6/0xed
[<ffffffff82339694>] down_write+0x31/0x52
[<ffffffffa0673b67>] ocfs2_reflink_ioctl+0x69a/0x1226 [ocfs2]
[<ffffffffa06599f6>] ocfs2_ioctl+0x61a/0x656 [ocfs2]
[<ffffffff820e53ac>] vfs_ioctl+0x2a/0x9d
[<ffffffff820e5903>] do_vfs_ioctl+0x45d/0x4ae
[<ffffffff820e59ab>] sys_ioctl+0x57/0x7a
[<ffffffff8200296b>] system_call_fastpath+0x16/0x1b
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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O_DIRECT writes.
Currently, the default behavior of O_DIRECT writes was allowing
concurrent writing among nodes to the same file, with no cluster
coherency guaranteed (no EX lock held). This can leave stale data in
the cache for buffered reads on other nodes.
The new mount option introduce a chance to choose two different
behaviors for O_DIRECT writes:
* coherency=full, as the default value, will disallow
concurrent O_DIRECT writes by taking
EX locks.
* coherency=buffered, allow concurrent O_DIRECT writes
without EX lock among nodes, which
gains high performance at risk of
getting stale data on other nodes.
Signed-off-by: Tristan Ye <tristan.ye@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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Functions such as ocfs2_recovery_init() make use of osb->max_slots.
Initialize osb->max_slots early so the functions may use the correct
value.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.de>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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fs/ocfs2/slot_map.c: In function ‘ocfs2_init_slot_info’:
fs/ocfs2/slot_map.c:360: warning: ‘bytes’ may be used uninitialized in this function
fs/ocfs2/slot_map.c:360: note: ‘bytes’ was declared here
Compiler: gcc version 4.4.3 (GCC) on Mandriva
I'm not sure why this warning occurs, I think compiler don't know that variable
"bytes" is initialized when it is sent by reference to
ocfs2_slot_map_physical_size and it throws that ugly warning.
However, a simple initialization of "bytes" variable with 0 will fix it.
Signed-off-by: Ionut Gabriel Popescu <poyo_vl@yahoo.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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This patch adds a safe check to ensure bg_free_bits_count doesn't exceed
bg_bits in a group descriptor. This is to avoid on disk corruption that was
seen recently.
debugfs: group <52803072>
Group Chain: 179 Parent Inode: 11 Generation: 2959379682
CRC32: 00000000 ECC: 0000
## Block# Total Used Free Contig Size
0 52803072 32256 4294965350 34202 18207 4032
......
Signed-off-by: Srinivas Eeda <srinivas.eeda@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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Signed-off-by: Joel Becker <joel.becker@oracle.com>
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When CONFIG_OCFS2_DEBUG_MASKLOG is undefined, we don't use the dentry
variable in ocfs2_sync_file(). Let's just move all access to the dentry
inside the logging call.
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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Track negative dentries by recording the generation number of the parent
directory in d_fsdata. The generation number for the parent directory is
recorded in the inode_info, which increments every time the lock on the
directory is dropped.
If the generation number of the parent directory and the negative dentry
matches, there is no need to perform the revalidate, else a revalidate
is forced. This improves performance in situations where nodes look for
the same non-existent file multiple times.
Thanks Mark for explaining the DLM sequence.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.de>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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Durring orphan scan, if we are slot 0, and we are replaying
orphan_dir:0001, the general process is that for every file
in this dir:
1. we will iget orphan_dir:0001, since there is no inode for it.
we will have to create an inode and read it from the disk.
2. do the normal work, such as delete_inode and remove it from
the dir if it is allowed.
3. call iput orphan_dir:0001 when we are done. In this case,
since we have no dcache for this inode, i_count will
reach 0, and VFS will have to call clear_inode and in
ocfs2_clear_inode we will checkpoint the inode which will let
ocfs2_cmt and journald begin to work.
4. We loop back to 1 for the next file.
So you see, actually for every deleted file, we have to read the
orphan dir from the disk and checkpoint the journal. It is very
time consuming and cause a lot of journal checkpoint I/O.
A better solution is that we can have another reference for these
inodes in ocfs2_super. So if there is no other race among
nodes(which will let dlmglue to checkpoint the inode), for step 3,
clear_inode won't be called and for step 1, we may only need to
read the inode for the 1st time. This is a big win for us.
So this patch will try to cache system inodes of other slots so
that we will have one more reference for these inodes and avoid
the extra inode read and journal checkpoint.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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The OCFS2 developers have already done all of the hard work to allow
volumes larger than 16 TiB. But there is still a "sanity check" in
fs/ocfs2/super.c that prevents the mounting of such volumes, even when
the cluster size and journal options would allow it.
This patch replaces that sanity check with a more sophisticated one to
mount a huge volume provided that (a) it is addressable by the raw
word/address size of the system (borrowing a test from ext4); (b) the
volume is using JBD2; and (c) the JBD2_FEATURE_INCOMPAT_64BIT flag is
set on the journal.
I factored out the sanity check into its own function. I also moved it
from ocfs2_initialize_super() down to ocfs2_check_volume(); any earlier,
and the journal will not have been initialized yet.
This patch is one of a pair, and it depends on the other ("JBD2: Allow
feature checks before journal recovery").
I have tested this patch on small volumes, huge volumes, and huge
volumes without 64-bit block support in the journal. All of them appear
to work or to fail gracefully, as appropriate.
Signed-off-by: Patrick LoPresti <lopresti@gmail.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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merge-2
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In CoW, when we meet with a readahead page, we know
it is time to move the readahead window. So carry
out a new readahead.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
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Add a new function ocfs2_readahead_for_cow so that
we start readahead before we start our CoW.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
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Add a new parameter 'struct file *' to ocfs2_refcount_cow
so that we can add readahead support later.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
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struct file * has file_ra_state to store the readahead state
and data. So pass this to ocfs2_prepare_inode_for_write. so
that it can be used in ocfs2_refcount_cow.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
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struct file * has file_ra_state to store the readahead state
and data. So pass this to ocfs2_write_begin_nolock so that
it can be used in ocfs2_refcount_cow.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
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Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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ocfs2_sync_inode() is used only from ocfs2_sync_file(). But all data has
already been written before calling ocfs2_sync_file() and ocfs2 doesn't use
inode's private_list for tracking metadata buffers thus sync_mapping_buffers()
is superfluous as well.
Signed-off-by: Jan Kara <jack@suse.cz>
Acked-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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Thanks for the comments. I have incorportated them all.
CONFIG_OCFS2_FS_STATS is enabled and CONFIG_DEBUG_LOCK_ALLOC is disabled.
Statistics now look like -
ocfs2_write_ctxt: 2144 - 2136 = 8
ocfs2_inode_info: 1960 - 1848 = 112
ocfs2_journal: 168 - 160 = 8
ocfs2_lock_res: 336 - 304 = 32
ocfs2_refcount_tree: 512 - 472 = 40
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.de>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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In ocfs2, actually we don't allow any direct write pass i_size,
see the function ocfs2_prepare_inode_for_write. So we don't
need the bogus simple_setsize.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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Now orphan scan worker has no trace log, so it is
very hard to tell whether it is finished or blocked.
So add 2 mlog trace log so that we can tell whether
the current orphan scan worker is blocked or not.
It does help when I analyzed a orphan scan bug.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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The reason why we need this ioctl is to offer the none-privileged
end-user a possibility to get filesys info gathering.
We use OCFS2_IOC_INFO to manipulate the new ioctl, userspace passes a
structure to kernel containing an array of request pointers and request
count, such as,
* From userspace:
struct ocfs2_info_blocksize oib = {
.ib_req = {
.ir_magic = OCFS2_INFO_MAGIC,
.ir_code = OCFS2_INFO_BLOCKSIZE,
...
}
...
}
struct ocfs2_info_clustersize oic = {
...
}
uint64_t reqs[2] = {(unsigned long)&oib,
(unsigned long)&oic};
struct ocfs2_info info = {
.oi_requests = reqs,
.oi_count = 2,
}
ret = ioctl(fd, OCFS2_IOC_INFO, &info);
* In kernel:
Get the request pointers from *info*, then handle each request one bye one.
Idea here is to make the spearated request small enough to guarantee
a better backward&forward compatibility since a small piece of request
would be less likely to be broken if filesys on raw disk get changed.
Currently, the following 7 requests are supported per the requirement from
userspace tool o2info, and I believe it will grow over time:-)
OCFS2_INFO_CLUSTERSIZE
OCFS2_INFO_BLOCKSIZE
OCFS2_INFO_MAXSLOTS
OCFS2_INFO_LABEL
OCFS2_INFO_UUID
OCFS2_INFO_FS_FEATURES
OCFS2_INFO_JOURNAL_SIZE
This ioctl is only specific to OCFS2.
Signed-off-by: Tristan Ye <tristan.ye@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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ocfs2_create_inode_in_orphan() is used by reflink to create the newly
reflinked inode simultaneously in the orphan dir. This allows us to easily
handle partially-reflinked files during recovery cleanup.
We have a problem though - the orphan dir stringifies inode # to determine
a unique name under which the orphan entry dirent can be created. Since
ocfs2_create_inode_in_orphan() needs the space allocated in the orphan dir
before it can allocate the inode, we currently call into the orphan code:
/*
* We give the orphan dir the root blkno to fake an orphan name,
* and allocate enough space for our insertion.
*/
status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
osb->root_blkno,
orphan_name, &orphan_insert);
Using osb->root_blkno might work fine on unindexed directories, but the
orphan dir can have an index. When it has that index, the above code fails
to allocate the proper index entry. Later, when we try to remove the file
from the orphan dir (using the actual inode #), the reflink operation will
fail.
To fix this, I created a function ocfs2_alloc_orphaned_file() which uses the
newly split out orphan and inode alloc code to figure out what the inode
block number will be (once allocated) and then prepare the orphan dir from
that data.
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Tao Ma <tao.ma@oracle.com>
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We do this because ocfs2_create_inode_in_orphan() wants to order locking of
the orphan dir with respect to locking of the inode allocator *before*
making any changes to the directory.
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Tao Ma <tao.ma@oracle.com>
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This allows code which needs to know the eventual block number of an inode
but can't allocate it yet due to transaction or lock ordering. For example,
ocfs2_create_inode_in_orphan() currently gives a junk blkno for preparation
of the orphan dir because it can't yet know where the actual inode is placed
- that code is actually in ocfs2_mknod_locked. This is a problem when the
orphan dirs are indexed as the junk inode number will create an index entry
which goes unused (and fails the later removal from the orphan dir). Now
with these interfaces, ocfs2_create_inode_in_orphan() can run the block
group search (and get back the inode block number) *before* any actual
allocation occurs.
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Tao Ma <tao.ma@oracle.com>
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ocfs2_search_chain() makes the same updates as
ocfs2_alloc_dinode_update_counts to the alloc inode. Instead of open coding
the bitmap update, use our helper function.
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Tao Ma <tao.ma@oracle.com>
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Do this by splitting the bulk of the function away from the inode allocation
code at the very tom of ocfs2_mknod_locked(). Existing callers don't need to
change and won't see any difference. The new function created,
__ocfs2_mknod_locked() will be used shortly.
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Tao Ma <tao.ma@oracle.com>
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commit(6b933c8e6f1a2f3118082c455eef25f9b1ac7b45).
The patch is to fix the regression bug brought from commit 6b933c8...( 'ocfs2:
Avoid direct write if we fall back to buffered I/O'):
http://oss.oracle.com/bugzilla/show_bug.cgi?id=1285
The commit 6b933c8e6f1a2f3118082c455eef25f9b1ac7b45 changed __generic_file_aio_write
to generic_file_buffered_write, which didn't call filemap_{write,wait}_range to flush
the pagecaches when we were falling O_DIRECT writes back to buffered ones. it did hurt
the O_DIRECT semantics somehow in extented odirect writes.
This patch tries to guarantee O_DIRECT writes of 'fall back to buffered' to be correctly
flushed.
Signed-off-by: Tristan Ye <tristan.ye@oracle.com>
Signed-off-by: Tao Ma <tao.ma@oracle.com>
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We cannot call grab_cache_page() when holding filesystem locks or with
a transaction started as grab_cache_page() calls page allocation with
GFP_KERNEL flag and thus page reclaim can recurse back into the filesystem
causing deadlocks or various assertion failures. We have to use
find_or_create_page() instead and pass it GFP_NOFS as we do with other
allocations.
Acked-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Tao Ma <tao.ma@oracle.com>
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We were setting ac->ac_last_group in ocfs2_claim_suballoc_bits from
res->sr_bg_blkno. Unfortunately, res->sr_bg_blkno is going to be zero under
normal (non-fragmented) circumstances. The discontig block group patches
effectively turned off that feature. Fix this by correctly calculating what
the next group hint should be.
Acked-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Tested-by: Goldwyn Rodrigues <rgoldwyn@suse.de>
Signed-off-by: Tao Ma <tao.ma@oracle.com>
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We have added discontig block group now, and now an inode
can be allocated in an discontig block group. So get
it in ocfs2_get_suballoc_slot_bit.
The old ocfs2_test_suballoc_bit gets group block no
from the allocation inode which is wrong. Fix it by
passing the right group.
Acked-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Tao Ma <tao.ma@oracle.com>
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When 'barrier' mount option is specified, we have to issue a cache flush
during fdatasync(2). We have to do this even if inode doesn't have
I_DIRTY_DATASYNC set because we still have to get written *data* to disk so
that they are not lost in case of crash.
Acked-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Singed-off-by: Tao Ma <tao.ma@oracle.com>
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__ocfs2_page_mkwrite now is broken in handling file end.
1. the last page should be the page contains i_size - 1.
2. the len in the last page is also calculated wrong.
So change them accordingly.
Acked-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Tao Ma <tao.ma@oracle.com>
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For local mounts, ocfs2_read_locked_inode() calls ocfs2_read_blocks_sync() to
read the inode off the disk. The latter first checks to see if that block is
cached in the journal, and, if so, returns that block. That is ok.
But ocfs2_read_locked_inode() goes wrong when it tries to validate the checksum
of such blocks. Blocks that are cached in the journal may not have had their
checksum computed as yet. We should not validate the checksums of such blocks.
Fixes ossbz#1282
http://oss.oracle.com/bugzilla/show_bug.cgi?id=1282
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Cc: stable@kernel.org
Singed-off-by: Tao Ma <tao.ma@oracle.com>
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Like tools, the checksum validate function now prints the values in hex.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Singed-off-by: Tao Ma <tao.ma@oracle.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2:
O2net: Disallow o2net accept connection request from itself.
ocfs2/dlm: remove potential deadlock -V3
ocfs2/dlm: avoid incorrect bit set in refmap on recovery master
Fix the nested PR lock calling issue in ACL
ocfs2: Count more refcount records in file system fragmentation.
ocfs2 fix o2dlm dlm run purgelist (rev 3)
ocfs2/dlm: fix a dead lock
ocfs2: do not overwrite error codes in ocfs2_init_acl
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Currently, o2net_accept_one() is allowed to accept a connection from
listening node itself, such a fake connection will not be successfully
established due to no handshake detected afterwards, and later end up
with triggering connecting worker in a loop.
We're going to fix this by treating such connection request as 'invalid',
since we've got no chance of requesting connection from a node to itself
in a OCFS2 cluster.
The fix doesn't hurt user's scan for o2net-listener, it always gets a
successful connection from userpace.
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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When we need to take both dlm_domain_lock and dlm->spinlock, we should take
them in order of: dlm_domain_lock then dlm->spinlock.
There is pathes disobey this order. That is calling dlm_lockres_put() with
dlm->spinlock held in dlm_run_purge_list. dlm_lockres_put() calls dlm_put() at
the ref and dlm_put() locks on dlm_domain_lock.
Fix:
Don't grab/put the dlm when the initialising/releasing lockres.
That grab is not required because we don't call dlm_unregister_domain()
based on refcount.
Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com>
Cc: stable@kernel.org
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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In the following situation, there remains an incorrect bit in refmap on the
recovery master. Finally the recovery master will fail at purging the lockres
due to the incorrect bit in refmap.
1) node A has no interest on lockres A any longer, so it is purging it.
2) the owner of lockres A is node B, so node A is sending de-ref message
to node B.
3) at this time, node B crashed. node C becomes the recovery master. it recovers
lockres A(because the master is the dead node B).
4) node A migrated lockres A to node C with a refbit there.
5) node A failed to send de-ref message to node B because it crashed. The failure
is ignored. no other action is done for lockres A any more.
For mormal, re-send the deref message to it to recovery master can fix it. Well,
ignoring the failure of deref to the original master and not recovering the lockres
to recovery master has the same effect. And the later is simpler.
Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com>
Acked-by: Srinivas Eeda <srinivas.eeda@oracle.com>
Cc: stable@kernel.org
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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Hi,
Thanks a lot for all the review and comments so far;) I'd like to send
the improved (V4) version of this patch.
This patch fixes a deadlock in OCFS2 ACL. We found this bug in OCFS2
and Samba integration using scenario, the symptom is several smbd
processes will be hung under heavy workload. Finally we found out it
is the nested PR lock calling that leads to this deadlock:
node1 node2
gr PR
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V
PR(EX)---> BAST:OCFS2_LOCK_BLOCKED
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rq PR
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wait=1
After requesting the 2nd PR lock, the process "smbd" went into D
state. It can only be woken up when the 1st PR lock's RO holder equals
zero. There should be an ocfs2_inode_unlock in the calling path later
on, which can decrement the RO holder. But since it has been in
uninterruptible sleep, the unlock function has no chance to be called.
The related stack trace is:
smbd D ffff8800013d0600 0 9522 5608 0x00000000
ffff88002ca7fb18 0000000000000282 ffff88002f964500 ffff88002ca7fa98
ffff8800013d0600 ffff88002ca7fae0 ffff88002f964340 ffff88002f964340
ffff88002ca7ffd8 ffff88002ca7ffd8 ffff88002f964340 ffff88002f964340
Call Trace:
[<ffffffff80350425>] schedule_timeout+0x175/0x210
[<ffffffff8034f580>] wait_for_common+0xf0/0x210
[<ffffffffa03e12b9>] __ocfs2_cluster_lock+0x3b9/0xa90 [ocfs2]
[<ffffffffa03e7665>] ocfs2_inode_lock_full_nested+0x255/0xdb0 [ocfs2]
[<ffffffffa0446019>] ocfs2_get_acl+0x69/0x120 [ocfs2]
[<ffffffffa0446368>] ocfs2_check_acl+0x28/0x80 [ocfs2]
[<ffffffff800e3507>] acl_permission_check+0x57/0xb0
[<ffffffff800e357d>] generic_permission+0x1d/0xc0
[<ffffffffa03eecea>] ocfs2_permission+0x10a/0x1d0 [ocfs2]
[<ffffffff800e3f65>] inode_permission+0x45/0x100
[<ffffffff800d86b3>] sys_chdir+0x53/0x90
[<ffffffff80007458>] system_call_fastpath+0x16/0x1b
[<00007f34a4ef6927>] 0x7f34a4ef6927
For details, please see:
https://bugzilla.novell.com/show_bug.cgi?id=614332 and
http://oss.oracle.com/bugzilla/show_bug.cgi?id=1278
Signed-off-by: Jiaju Zhang <jjzhang@suse.de>
Acked-by: Mark Fasheh <mfasheh@suse.com>
Cc: stable@kernel.org
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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The refcount record calculation in ocfs2_calc_refcount_meta_credits
is too optimistic that we can always allocate contiguous clusters
and handle an already existed refcount rec as a whole. Actually
because of file system fragmentation, we may have the chance to split
a refcount record into 3 parts during the transaction. So consider
the worst case in record calculation.
Cc: stable@kernel.org
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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This patch fixes two problems in dlm_run_purgelist
1. If a lockres is found to be in use, dlm_run_purgelist keeps trying to purge
the same lockres instead of trying the next lockres.
2. When a lockres is found unused, dlm_run_purgelist releases lockres spinlock
before setting DLM_LOCK_RES_DROPPING_REF and calls dlm_purge_lockres.
spinlock is reacquired but in this window lockres can get reused. This leads
to BUG.
This patch modifies dlm_run_purgelist to skip lockres if it's in use and purge
next lockres. It also sets DLM_LOCK_RES_DROPPING_REF before releasing the
lockres spinlock protecting it from getting reused.
Signed-off-by: Srinivas Eeda <srinivas.eeda@oracle.com>
Acked-by: Sunil Mushran <sunil.mushran@oracle.com>
Cc: stable@kernel.org
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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When we have to take both dlm->master_lock and lockres->spinlock,
take them in order
lockres->spinlock and then dlm->master_lock.
The patch fixes a violation of the rule.
We can simply move taking dlm->master_lock to where we have dropped res->spinlock
since when we access res->state and free mle memory we don't need master_lock's
protection.
Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com>
Cc: stable@kernel.org
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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Setting the acl while creating a new inode depends on
the error codes of posix_acl_create_masq. This patch fix
a issue of overwriting the error codes of it.
Reported-by: Pawel Zawora <pzawora@gmail.com>
Cc: <stable@kernel.org> [ .33, .34 ]
Signed-off-by: Tiger Yang <tiger.yang@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (96 commits)
no need for list_for_each_entry_safe()/resetting with superblock list
Fix sget() race with failing mount
vfs: don't hold s_umount over close_bdev_exclusive() call
sysv: do not mark superblock dirty on remount
sysv: do not mark superblock dirty on mount
btrfs: remove junk sb_dirt change
BFS: clean up the superblock usage
AFFS: wait for sb synchronization when needed
AFFS: clean up dirty flag usage
cifs: truncate fallout
mbcache: fix shrinker function return value
mbcache: Remove unused features
add f_flags to struct statfs(64)
pass a struct path to vfs_statfs
update VFS documentation for method changes.
All filesystems that need invalidate_inode_buffers() are doing that explicitly
convert remaining ->clear_inode() to ->evict_inode()
Make ->drop_inode() just return whether inode needs to be dropped
fs/inode.c:clear_inode() is gone
fs/inode.c:evict() doesn't care about delete vs. non-delete paths now
...
Fix up trivial conflicts in fs/nilfs2/super.c
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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... and let iput_final() do the actual eviction or retention
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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