The object extent offset is the file offset _modulo_ the stripe unit.
The code was correct, the comment was wrong.
Reported-by: NNoah Watkins <jayhawk@soe.ucsc.edu>
Signed-off-by: NSage Weil <sage@newdream.net>

Using stripe unit size calculated and saved on the stack to avoid
a redundant call to le32_to_cpu.
Signed-off-by: NNoah Watkins <noah@noahdesu.com>
Signed-off-by: NSage Weil <sage@newdream.net>

Usage of non-list.h list_entry function for container_of
functionality replaced with direct use of container_of.
Signed-off-by: NNoah Watkins <noah@noahdesu.com>
Signed-off-by: NSage Weil <sage@newdream.net>

This simplifies much of the error handling during mount.  It also means
that we have the mount args before client creation, and we can initialize
based on those options.
Signed-off-by: NSage Weil <sage@newdream.net>

Clearly demark int and string argument options, and do not try to convert
string arguments to ints.
Signed-off-by: NSage Weil <sage@newdream.net>

Signed-off-by: NSage Weil <sage@newdream.net>

Since we've increased the max mon count, we shouldn't put the addr array
on the parse_mount_args stack.  Put it on the heap instead.
Signed-off-by: NSage Weil <sage@newdream.net>

Get rid of separate max mon limit; use the system limit instead.  This
allows mounts when there are lots of mon addrs provided by mount.ceph (as
with a host with lots of A/AAAA records).
Signed-off-by: NSage Weil <sage@newdream.net>

We can't fill i_size with rbytes at the fill_file_size stage without
adding additional checks for directories.  Notably, we want st_blocks
to remain 0 on directories so that 'du' still works.

Fill in i_blocks, i_size specially in ceph_getattr instead.
Signed-off-by: NSage Weil <sage@newdream.net>

Signed-off-by: NSage Weil <sage@newdream.net>

Mix the preferred osd (if any) into the placement seed that is fed into
the CRUSH object placement calculation.  This prevents all the placement
pgs from peering with the same osds.

Rev the osd client protocol with this change.
Signed-off-by: NSage Weil <sage@newdream.net>

Initialized bdi->ra_pages to enable readahead.  Use 512KB default.
Signed-off-by: NSage Weil <sage@newdream.net>

Cleanup only.
Signed-off-by: NSage Weil <sage@newdream.net>

Pass the front_len we need when pulling a message off a msgpool,
and WARN if it is greater than the pool's size.  Then try to
allocate a new message (to continue without failing).
Signed-off-by: NSage Weil <sage@newdream.net>

Defined a struct for the SUBSCRIBE_ACK, and use that to size
the msgpool.
Signed-off-by: NSage Weil <sage@newdream.net>

Previously we were flushing dirty caps by passing an extra flag
when traversing the delayed caps list.  Besides being a bit ugly,
that can also miss caps that are dirty but didn't result in a
cap requeue: notably, mark_caps_dirty().

Separate the flushing into a separate helper, and traverse the
cap_dirty list.

This also brings i_dirty_item in line with i_dirty_caps: we are
on the list IFF caps != 0.  We carry an inode ref IFF
dirty_caps|flushing_caps != 0.

Lose the unused return value from __ceph_mark_caps_dirty().
Signed-off-by: NSage Weil <sage@newdream.net>

Both callers of __mark_caps_flushing() do the same work; move it
into the helper.
Signed-off-by: NSage Weil <sage@newdream.net>

Writeback doesn't work without the bdi set, and writeback on
umount doesn't work if we unregister the bdi too early.
Signed-off-by: NSage Weil <sage@newdream.net>

This avoids the fugly pass by reference and makes the code a bit easier
to read.
Signed-off-by: NSage Weil <sage@newdream.net>

This makes it easier for individual message types to indicate
their particular encoding, and make future changes backward
compatible.
Signed-off-by: NSage Weil <sage@newdream.net>

Signed-off-by: NSage Weil <sage@newdream.net>

This lets us extend the format more easily.
Signed-off-by: NSage Weil <sage@newdream.net>

This tracks updates to code shared with userspace.
Signed-off-by: NSage Weil <sage@newdream.net>

The mon request headers now include session_mon information that must
be properly initialized.
Signed-off-by: NSage Weil <sage@newdream.net>

This ensures we don't submit the same request twice if we are kicking a
specific osd (as with an osd_reset), or when we hit a transient error and
resend.
Signed-off-by: NSage Weil <sage@newdream.net>

The peer_reset just takes longer (until we reconnect and discover the osd
dropped the session... which it will).
Signed-off-by: NSage Weil <sage@newdream.net>

Return an error and report a corrupt map instead of crying BUG().
Signed-off-by: NSage Weil <sage@newdream.net>

If an osd has failed or returned and a request has been sent twice, it's
possible to get a reply and unregister the request while the request
message is queued for delivery.  Since the message references the caller's
page vector, we need to revoke it before completing.
Signed-off-by: NSage Weil <sage@newdream.net>

The osd request submission path registers the request, drops and retakes
the request_mutex, then sends it to the OSD.  A racing kick_requests could
sent it during that interval, causing the same msg to be sent twice and
BUGing in the msgr.

Fix by only sending the message if it hasn't been touched by other
threads.
Signed-off-by: NSage Weil <sage@newdream.net>

Be conservative: renew subscription once half the interval has expired.

Do not reuse sub expiration to control hunting.
Signed-off-by: NSage Weil <sage@newdream.net>

A misplaced sizeof() around namelen was throwing things off.
Signed-off-by: NSage Weil <sage@newdream.net>

This avoids a divide by zero when the input and/or map are
malformed.
Signed-off-by: NSage Weil <sage@newdream.net>

Signed-off-by: NSage Weil <sage@newdream.net>

Kill the old git revision; print the ceph version and protocol
versions instead.
Signed-off-by: NSage Weil <sage@newdream.net>

Document files shared between kernel and user code trees.
Signed-off-by: NSage Weil <sage@newdream.net>

Kconfig options and Makefile.
Signed-off-by: NSage Weil <sage@newdream.net>

Basic state information is available via /sys/kernel/debug/ceph,
including instances of the client, fsids, current monitor, mds and osd
maps, outstanding server requests, and hooks to adjust debug levels.
Signed-off-by: NSage Weil <sage@newdream.net>

A few Ceph ioctls for getting and setting file layout (striping)
parameters, and learning the identity and network address of the OSD a
given region of a file is stored on.
Signed-off-by: NSage Weil <sage@newdream.net>

Basic NFS re-export support is included.  This mostly works.  However,
Ceph's MDS design precludes the ability to generate a (small)
filehandle that will be valid forever, so this is of limited utility.
Signed-off-by: NSage Weil <sage@newdream.net>

The msgpool is a basic mempool_t-like structure to preallocate
messages we expect to receive over the wire.  This ensures we have the
necessary memory preallocated to process replies to requests, or to
process unsolicited messages from various servers.
Signed-off-by: NSage Weil <sage@newdream.net>