This function tries locate the right alloc group, where a given physical block
resides, it returns the caller a buffer_head of victim group descriptor, and also
the offset of block in this group, by passing the block number.
Signed-off-by: NTristan Ye <tristan.ye@oracle.com>

It's a relatively complete function to accomplish defragmentation for entire
or partial extent, one journal handle was kept during the operation, it was
logically doing one more thing than ocfs2_move_extent() acutally, yes, it's
claiming the new clusters itself;-)
Signed-off-by: NTristan Ye <tristan.ye@oracle.com>

The moving range of __ocfs2_move_extent() was within one extent always, it
consists following parts:

1. Duplicates the clusters in pages to new_blkoffset, where extent to be moved.

2. Split the original extent with new extent, coalecse the nearby extents if possible.

3. Append old clusters to truncate log, or decrease_refcount if the extent was refcounted.
Signed-off-by: NTristan Ye <tristan.ye@oracle.com>

Ocfs2/move_extents: lock allocators and reserve metadata blocks and data clusters for extents moving.

ocfs2_lock_allocators_move_extents() was like the common ocfs2_lock_allocators(),
to lock metadata and data alloctors during extents moving, reserve appropriate
metadata blocks and data clusters, also performa a best- effort to calculate the
credits for journal transaction in one run of movement.
Signed-off-by: NTristan Ye <tristan.ye@oracle.com>

Adding new files move_extents.[c|h] and fill it with nothing but
only a context structure.
Signed-off-by: NTristan Ye <tristan.ye@oracle.com>

Patch also manages to add a manipulative struture for this ioctl.
Signed-off-by: NTristan Ye <tristan.ye@oracle.com>

The original goal of commonizing these funcs is to benefit defraging/extent_moving
codes in the future,  based on the fact that reflink and defragmentation having
the same Copy-On-Wrtie mechanism.
Signed-off-by: NTristan Ye <tristan.ye@oracle.com>

This new code is a bit more complicated than former ones, the goal is to
show user all statistics required to take a deep insight into filesystem
on how the disk is being fragmentaed.

The goal is achieved by scaning global bitmap from (cluster)group to group
to figure out following factors in the filesystem:

        - How many free chunks in a fixed size as user requested.
        - How many real free chunks in all size.
        - Min/Max/Avg size(in) clusters of free chunks.
        - How do free chunks distribute(in size) in terms of a histogram,
          just like following:
          ---------------------------------------------------------
          Extent Size Range :  Free extents  Free Clusters  Percent
             32K...   64K-  :             1             1    0.00%
              1M...    2M-  :             9           288    0.03%
              8M...   16M-  :             2           831    0.09%
             32M...   64M-  :             1          2047    0.23%
            128M...  256M-  :             1          8191    0.92%
            256M...  512M-  :             2         21706    2.43%
            512M... 1024M-  :            27        858623   96.29%
          ---------------------------------------------------------

Userspace ioctl() call eventually gets the above info returned by passing
a 'struct ocfs2_info_freefrag' with the chunk_size being specified first.
Signed-off-by: NTristan Ye <tristan.ye@oracle.com>

The new code is dedicated to calculate free inodes number of all inode_allocs,
then return the info to userpace in terms of an array.

Specially, flag 'OCFS2_INFO_FL_NON_COHERENT', manipulated by '--cluster-coherent'
from userspace, is now going to be involved. setting the flag on means no cluster
coherency considered, usually, userspace tools choose none-coherency strategy by
default for the sake of performace.
Signed-off-by: NTristan Ye <tristan.ye@oracle.com>

It just removes some macros for the sake of typechecking gains.
Signed-off-by: NTristan Ye <tristan.ye@oracle.com>

During resource migration, if the target node were to die, the thread doing
the migration spins until the target node is not removed from the domain map.
This patch slows the spin by making the thread wait for the recovery to kick in.
Signed-off-by: NSunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: NJoel Becker <jlbec@evilplan.org>

Patch skips mount recovery for hard-ro mounts which otherwise leads to an oops.
Signed-off-by: NSunil Mushran <sunil.mushran@oracle.com>
Acked-by: NMark Fasheh <mfasheh@suse.com>
Signed-off-by: NJoel Becker <jlbec@evilplan.org>

If o2hb finds unexpected values in the heartbeat slot, it prints a message
"ERROR: Device "dm-6": another node is heartbeating in our slot!"

This message could be misleading. This patch adds two more messages to
help users better diagnose the problem.
Signed-off-by: NSunil Mushran <sunil.mushran@oracle.com>
Acked-by: NMark Fasheh <mfasheh@suse.com>
Signed-off-by: NJoel Becker <jlbec@evilplan.org>

We have seen isolated cases (very few, I might add) of o2hb not detecting all
live nodes on startup. One plausible reasoning for it is that other node had
a hb io delay at the same time. The live threshold set at 2 (as low as it can
be) could be increased to ameliorate the situation.

But increasing the threshold directly affects mount time. Currently it takes
around 5 secs to mount a volume in o2cb cluster with local heartbeat. Increasing
the threshold will make mounts even slower. As the issue itself is rare, we have
left things as they are for the local heartbeat mode.

However we can improve the situation for global heartbeat mode as in that mode,
we start the heartbeat much before the mount.

This patch doubles the live threshold for the start of the first region in
global heartbeat mode.

Addresses internal Oracle bug#10635585.
Signed-off-by: NSunil Mushran <sunil.mushran@oracle.com>
Acked-by: NMark Fasheh <mfasheh@suse.com>
Signed-off-by: NJoel Becker <jlbec@evilplan.org>

Patch fixes a bug in the o2dlm protocol negotiation in that it is using
the builtin version rather than the negotiated version during the domain
join. This causes join errors when a node having kernel >= 2.6.37 joins
a cluster with nodes having kernels < 2.6.37.

This only affects the o2cb cluster stack.
Signed-off-by: NSunil Mushran <sunil.mushran@oracle.com>
Reported-by: NJacek Stepniewski <Jacek.Stepniewski@agora.pl>
Acked-by: NMark Fasheh <mfasheh@suse.com>
Signed-off-by: NJoel Becker <jlbec@evilplan.org>

In the case of removing a partial extent record which covers a hole, current
punching-hole logic will try to remove more than the length of whole extent
record, which leads to the failure of following assert(fs/ocfs2/alloc.c):

5507         BUG_ON(cpos < le32_to_cpu(rec->e_cpos) || trunc_range > rec_range);

This patch tries to skip existing hole at the last attempt of removing a partial
extent record, what's more, it also adds some necessary comments for better
understanding of punching-hole codes.
Signed-off-by: NTristan Ye <tristan.ye@oracle.com>
Signed-off-by: NJoel Becker <jlbec@evilplan.org>

CLANG found that there is a path that has data_ac uninitialized,
this place
	2917	/* This gets us the dx_root */
	2918	ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac);
	2919	if (ret) {

	3
		Taking true branch
	2920	mlog_errno(ret);
	2921	goto out;

	4
		Control jumps to line 3168
	2922	}

Goes to the out: label without data_ac being initialized.

Ciao, Marcus
Signed-Off-By: NMarcus Meissner <meissner@suse.de>
Signed-off-by: NMark Fasheh <mfasheh@suse.com>
Signed-off-by: NJoel Becker <jlbec@evilplan.org>

These changes were incorrectly fixed by codespell. They were now
manually corrected.
Signed-off-by: NLucas De Marchi <lucas.demarchi@profusion.mobi>

Signed-off-by: NJustin P. Mattock <justinmattock@gmail.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

Fixes generated by 'codespell' and manually reviewed.
Signed-off-by: NLucas De Marchi <lucas.demarchi@profusion.mobi>

When a hole spans across page boundaries, the next write forces
a read of the block. This could end up reading existing garbage
data from the disk in ocfs2_map_page_blocks. This leads to
non-zero holes. In order to avoid this, mark the writes as new
when the holes span across page boundaries.
Signed-off-by: NGoldwyn Rodrigues <rgoldwyn@suse.de>
Signed-off-by: Njlbec <jlbec@evilplan.org>

When CONFIG_DEBUG_FS=y and CONFIG_OCFS2_FS_STATS=n, we get the
following warning:

fs/ocfs2/cluster/tcp.c:213:16: warning: ‘o2net_get_func_run_time’
defined but not used

Since o2net_get_func_run_time is only called from
o2net_update_recv_stats, so move it under CONFIG_OCFS2_FS_STATS.
Signed-off-by: NRakib Mullick <rakib.mullick@gmail.com>
Signed-off-by: Njlbec <jlbec@evilplan.org>

And give it a kernel-doc comment.

[akpm@linux-foundation.org: btrfs changed in linux-next]
Signed-off-by: NSerge E. Hallyn <serge.hallyn@canonical.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Daniel Lezcano <daniel.lezcano@free.fr>
Acked-by: NDavid Howells <dhowells@redhat.com>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

As a preparation for removing ext2 non-atomic bit operations from
asm/bitops.h.  This converts ext2 non-atomic bit operations to
little-endian bit operations.
Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
Acked-by: NJoel Becker <joel.becker@oracle.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Replace EXTRA_CFLAGS with ccflags-y. And change ntfs-objs to ntfs-y
for cleaner conditional inclusion.
Signed-off-by: Nmatt mooney <mfm@muteddisk.com>
Acked-by: NWANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: NMichal Marek <mmarek@suse.cz>

The exportfs encode handle function should return the minimum required
handle size. This helps user to find out the handle size by passing 0
handle size in the first step and then redoing to the call again with
the returned handle size value.
Acked-by: NSerge Hallyn <serue@us.ibm.com>
Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

all remaining callers pass LOOKUP_PARENT to it, so
flags argument can die; renamed to kern_path_parent()
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

can't blindly check nd->flags in ->d_revalidate()
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

Code has been converted over to the new explicit on-stack plugging,
and delay users have been converted to use the new API for that.
So lets kill off the old plugging along with aops->sync_page().
Signed-off-by: NJens Axboe <jaxboe@fusionio.com>

In dlm_query_region_handler(), move the kmalloc outside the spinlock.
This allows us to use GFP_KERNEL instead of GFP_ATOMIC.
Signed-off-by: NSunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: NJoel Becker <jlbec@evilplan.org>

Since we have removed almost all of the masklogs in fs/ocfs2/*,
make the left masklogs compat.
Signed-off-by: NTao Ma <boyu.mt@taobao.com>

There is no user for masklog AIO, so remove it.
Signed-off-by: NTao Ma <boyu.mt@taobao.com>

Remove mlog(0,...) and mlog(ML_UPTODATE,...) from
fs/ocfs2/uptodate.c and fs/ocfs2/buffer_head_io.c.

The masklog UPTODATE is removed finally.
Signed-off-by: NTao Ma <boyu.mt@taobao.com>

Remove mlog(0,...) and mlog(ML_BH_IO,...) from
fs/ocfs2/buffer_head_io.c.
The masklog BH_IO is removed finally.
Signed-off-by: NTao Ma <boyu.mt@taobao.com>

Remove mlog(0) from fs/ocfs2/journal.c and the masklog JOURNAL.
Signed-off-by: NTao Ma <boyu.mt@taobao.com>

Remove mlog(0) from fs/ocfs2/export.c and the masklog EXPORT.
Signed-off-by: NTao Ma <boyu.mt@taobao.com>

Remove mlog(0) from fs/ocfs2/dcache.c and the masklog DCACHE.
Signed-off-by: NTao Ma <boyu.mt@taobao.com>

Remove mlog(0) from fs/ocfs2/namei.c and the masklog NAMEI finally.
Signed-off-by: NTao Ma <boyu.mt@taobao.com>

This is the 2nd step to remove the debug info of NAMEI.
Signed-off-by: NTao Ma <boyu.mt@taobao.com>

No mlog(0,...) in symlink.c, so just remove NAMEI.
Signed-off-by: NTao Ma <boyu.mt@taobao.com>