It was evaludated to indexed before, check it is ok i think.
Signed-off-by: Jeff Liu <jeff.liu@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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>
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>
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>
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>
dlm protocol 1.1. activates messages DLM_QUERY_REGION and DLM_QUERY_NODEINFO
that are a must for global heartbeat.
It also activates o2hb_global_heartbeat_active().
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
This patch adds a per region debugfs file that shows the elapsed time
since the time the o2hb timer was last armed.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
This patch creates debugfs directory for each o2hb region and creates
files to expose the region number and the per region live node bitmap.
This information will be useful in debugging cluster issues.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
This patch prints the bitmaps of live, quorum and failed regions. This
information will be useful in debugging cluster issues.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
In global heartbeat mode, we track the bitmap of regions that have seen
heartbeat timeouts. We fence if the number of such regions is greater than
or equal to half the number of quorum regions.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
o2hb allows online adding of regions. However, a newly added region is not
used in quorum calculations unless it has been added on all nodes. This patch
tracks a bitmap of such quorum regions.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
In global heartbeat mode, we have a upper limit for the number of active regions.
This patch adds the facility to track the number of active global heartbeat
regions and fails to start heartbeat if the number exceeds the maximum.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Currently we track a global livenode bitmap that keeps track of all nodes
that are heartbeating in all regions.
This patch adds the ability to track the livenode bitmap on a per region basis.
We will use this facility in a later patch to allow us to withstand the loss of
a minority number of regions.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
o2hb currently checks slots for configured nodes only. This patch makes
it check the slots for the live nodes too to take care of a race in which
a node is removed from the configuration but not from the live map.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Prints messages when the user adds or removes heartbeat regions in global
heartbeat mode. These messages are useful when debugging cluster related issues.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Adds new dlm message DLM_QUERY_NODEINFO that sends the attributes of all
registered nodes. This message is sent if the negotiated dlm protocol is
1.1 or higher. If the information of the joining node does not match
that of any existing nodes, the join domain request is rejected.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
In global heartbeat mode, the heartbeat is started by the user. This patch
prints an error if the user attempts to mount a volume without starting the
heartbeat.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Adds new dlm message DLM_QUERY_REGION that sends the names of all active
heartbeat regions. This message is only sent in the global heartbeat
mode. If the regions in the joining node do not fully match the ones in
the active nodes, the join domain request is rejected.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Export function in o2hb to get a list of heartbeat regions. It also adds an
upper limit to the length of the heartbeat region name.
o2hb_global_heartbeat_active() currently disables global heartbeat. It will
be enabled in a later patch after all the code is added.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Adds support for heartbeat=global mount option. It ensures that the heartbeat
mode passed matches the one enabled on disk.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
OCFS2_FEATURE_INCOMPAT_CLUSTERINFO allows us to use sb->s_cluster_info for
both userspace and o2cb cluster stacks. It also allows us to extend cluster
info to include stack flags.
This patch also adds stackflags to sb->s_clusterinfo. It also introduces a
clusterinfo flag OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT to denote the enabled
global heartbeat mode.
This incompat flag can be set/cleared using tunefs.ocfs2 --fs-features. The
clusterinfo flag is set/cleared using tunefs.ocfs2 --update-cluster-stack.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Add heartbeat mode parameter to the configfs tree. This will be used
to set/show the heartbeat mode. The user is free to toggle the mode
between local and global as long as there is no active heartbeat region.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
ocfs2 fast symlinks are NUL terminated strings stored inline in the
inode data area. However, disk corruption or a local attacker could, in
theory, remove that NUL. Because we're using strlen() (my fault,
introduced in a731d1 when removing vfs_follow_link()), we could walk off
the end of that string.
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Cc: stable@kernel.org
While umounting, a block mle doesn't get freed if dlm is shutdown after
master request is received but before assert master. This results in unclean
shutdown of dlm domain.
This patch frees all mles that lie around after other nodes were notified about
exiting the dlm and marking dlm state as leaving. Only block mles are expected
to be around, so we log ERROR for other mles but still free them.
Signed-off-by: Srinivas Eeda <srinivas.eeda@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
We sync our inode flags with ext2 and define them by hex
values. But actually in commit 3669567(4 years ago), all
these values are moved to include/linux/fs.h. So we'd
better also use them as what ext2 did. So sync our inode
flags with ext2 by using FS_*.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
The first time I read the function ocfs2_resmap_resv_bits, I consider
about what 'wanted' will be used and consider about the comments.
Then I find it is only used if the reservation is empty. ;)
So we'd better move it to the parens so that it make the code more
readable, what's more, ocfs2_resmap_resv_bits is used so frequently
and we should save some cpus.
Acked-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
e_leaf_clusters is a le16, so use cpu_to_le16 instead
of cpu_to_le32.
What's more, we change 'clusters' to unsigned int to
signify that the size of 'clusters' isn't important here.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
In commit 30e2bab, ext3 fixed it. So change it accordingly in ocfs2.
Steps to reproduce:
# touch aaa
# stat -c %Z aaa
1283760364
# setfacl -m 'u::x,g::x,o::x' aaa
# stat -c %Z aaa
1283760364
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
mmotm/fs/ocfs2/cluster/tcp.c: In function ‘o2net_send_message_vec’:
mmotm/fs/ocfs2/cluster/tcp.c:980:6: warning: ‘ret’ may be used uninitialized in this function
It seems a real bug introduced by commit 9af0b38ff3 (ocfs2/net:
Use wait_event() in o2net_send_message_vec()).
cc: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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>
This patch tries to handle the case in which list 'dlm->tracking_list' is
empty, to avoid accessing an invalid pointer. It fixes the following oops:
http://oss.oracle.com/bugzilla/show_bug.cgi?id=1287
Signed-off-by: Tristan Ye <tristan.ye@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
In ocfs2_dx_dir_rebalance(), we need to rejournal_acess the blocks after
calling ocfs2_insert_extent() since growing an extent tree may trigger
ocfs2_extend_trans(), which makes previous journal_access meaningless.
Signed-off-by: Tristan Ye <tristan.ye@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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>
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>
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>
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>
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>
