Commit Graph

711 Commits

Author SHA1 Message Date
Greg Farnum 8f04d42276 ceph: report f_bfree based on kb_avail rather than diffing.
Reviewed-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Greg Farnum <gregory.farnum@dreamhost.com>
2011-07-26 11:27:06 -07:00
Sage Weil e77dc3e9c0 ceph: only queue capsnap if caps are dirty
We used to go into this branch if i_wrbuffer_ref_head was non-zero.  This
was an ancient check from before we were careful about dealing with all
kinds of caps (and not just dirty pages).  It is cleaner to only queue a
capsnap if there is an actual dirty cap.  If we are racing with...
something...we will end up here with ci->i_wrbuffer_refs but no dirty
caps.

Reviewed-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2011-07-26 11:26:41 -07:00
Sage Weil af0ed569d7 ceph: fix snap writeback when racing with writes
There are two problems that come up when we try to queue a capsnap while a
write is in progress:

 - The FILE_WR cap is held, but not yet dirty, so we may queue a capsnap
   with dirty == 0.  That will crash later in __ceph_flush_snaps().  Or
   on the FILE_WR cap if a write is in progress.
 - We may not have i_head_snapc set, which causes problems pretty quickly.
   Look to the snaprealm in this case.

Reviewed-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2011-07-26 11:26:31 -07:00
Sage Weil 9cfa1098dc ceph: use flag bit for at_end readdir flag
This saves us a word of memory per file.

Reviewed-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2011-07-26 11:26:18 -07:00
Sage Weil 4918b6d140 ceph: add F_SYNC file flag to force sync (non-O_DIRECT) io
This allows us to force IO through the sync path which you normally only
get when multiple clients are reading/writing to the same file or by
mounting with -o sync.  Among other things, this lets test programs verify
correctness with a single mount.

Reviewed-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2011-07-26 11:26:07 -07:00
Sage Weil 252c6728de ceph: add flags field to file_info
Reviewed-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2011-07-26 11:25:27 -07:00
Josef Bacik 02c24a8218 fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers
Btrfs needs to be able to control how filemap_write_and_wait_range() is called
in fsync to make it less of a painful operation, so push down taking i_mutex and
the calling of filemap_write_and_wait() down into the ->fsync() handlers.  Some
file systems can drop taking the i_mutex altogether it seems, like ext3 and
ocfs2.  For correctness sake I just pushed everything down in all cases to make
sure that we keep the current behavior the same for everybody, and then each
individual fs maintainer can make up their mind about what to do from there.
Thanks,

Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20 20:47:59 -04:00
Josef Bacik 06222e491e fs: handle SEEK_HOLE/SEEK_DATA properly in all fs's that define their own llseek
This converts everybody to handle SEEK_HOLE/SEEK_DATA properly.  In some cases
we just return -EINVAL, in others we do the normal generic thing, and in others
we're simply making sure that the properly due-dilligence is done.  For example
in NFS/CIFS we need to make sure the file size is update properly for the
SEEK_HOLE and SEEK_DATA case, but since it calls the generic llseek stuff itself
that is all we have to do.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20 20:47:58 -04:00
Al Viro b85fd6bdc9 don't open-code parent_ino() in assorted ->readdir()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20 20:47:54 -04:00
Al Viro a127e0af59 ceph: LOOKUP_OPEN is set only when it's the last component
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20 01:43:59 -04:00
Al Viro 8a5e929dd2 don't transliterate lower bits of ->intent.open.flags to FMODE_...
->create() instances are much happier that way...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20 01:43:52 -04:00
Al Viro 10556cb21a ->permission() sanitizing: don't pass flags to ->permission()
not used by the instances anymore.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20 01:43:24 -04:00
Al Viro 2830ba7f34 ->permission() sanitizing: don't pass flags to generic_permission()
redundant; all callers get it duplicated in mask & MAY_NOT_BLOCK and none of
them removes that bit.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20 01:43:22 -04:00
Al Viro 178ea73521 kill check_acl callback of generic_permission()
its value depends only on inode and does not change; we might as
well store it in ->i_op->check_acl and be done with that.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20 01:43:16 -04:00
Al Viro 1b71fe2efa ceph analog of cifs build_path_from_dentry() race fix
... unfortunately, cifs bug got copied.  Fix is essentially the same.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-16 23:43:58 -04:00
Sage Weil d7f124f129 ceph: fix sync and dio writes across stripe boundaries
We were iterating across stripe boundaries properly, but not moving the
write buffer pointer forward.  This caused us to rewrite the same data
after the break.  Fix by adjusting the data pointer forward, and
recalculating the io and buffer alignment after the break.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-06-13 16:26:22 -07:00
Sage Weil 773e9b4426 ceph: fix page alignment corrections
dd if=/dev/urandom of=/mnt/fs_depot/dd10 bs=500 seek=8388 count=1
 dd if=/mnt/fs_depot/dd10 of=/root/dd10out bs=500 skip=8388 count=1

Reported-by: Henry C Chang <henry.cy.chang@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2011-06-13 16:26:10 -07:00
Sage Weil 0c1f91f271 ceph: unwind canceled flock state
If we request a lock and then abort (e.g., ^C), we need to send a matching
unlock request to the MDS to unwind our lock attempt to avoid indefinitely
blocking other clients.

Reported-by: Brian Chrisman <brchrisman@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2011-06-07 21:36:45 -07:00
Sage Weil 0e98728fa3 ceph: fix ENOENT logic in striped_read
Getting ENOENT is equivalent to reading 0 bytes.  Make that correction
before setting up the hit_stripe and was_short flags.

Fixes the following case:
 dd if=/dev/zero of=/mnt/fs_depot/dd3 bs=1 seek=1048576 count=0
 dd if=/mnt/fs_depot/dd3 of=/root/ddout1 skip=8 bs=500 count=2 iflag=direct

Reported-by: Henry C Chang <henry.cy.chang@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2011-06-07 21:34:16 -07:00
Sage Weil c3cd62839a ceph: fix short sync reads from the OSD
If we get a short read from the OSD because the object is small, we need to
zero the remainder of the buffer.  For O_DIRECT reads, the attempted range
is not trimmed to i_size by the VFS, so we were actually looping
indefinitely.

Fix by trimming by i_size, and the unconditionally zeroing the trailing
range.

Reported-by: Jeff Wu <cpwu@tnsoft.com.cn>
Signed-off-by: Sage Weil <sage@newdream.net>
2011-06-07 21:34:14 -07:00
Sage Weil 70b666c3b4 ceph: use ihold when we already have an inode ref
We should use ihold whenever we already have a stable inode ref, even
when we aren't holding i_lock.  This avoids adding new and unnecessary
locking dependencies.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-06-07 21:34:11 -07:00
Sage Weil db3540522e ceph: fix cap flush race reentrancy
In e9964c10 we change cap flushing to do a delicate dance because some
inodes on the cap_dirty list could be in a migrating state (got EXPORT but
not IMPORT) in which we couldn't actually flush and move from
dirty->flushing, breaking the while (!empty) { process first } loop
structure.  It worked for a single sync thread, but was not reentrant and
triggered infinite loops when multiple syncers came along.

Instead, move inodes with dirty to a separate cap_dirty_migrating list
when in the limbo export-but-no-import state, allowing us to go back to
the simple loop structure (which was reentrant).  This is cleaner and more
robust.

Audited the cap_dirty users and this looks fine:
list_empty(&ci->i_dirty_item) is still a reliable indicator of whether we
have dirty caps (which list we're on is irrelevant) and list_del_init()
calls still do the right thing.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-05-24 11:52:12 -07:00
Sage Weil 45e3d3eeb6 ceph: avoid inode lookup on nfs fh reconnect
If we get the inode from the MDS, we have a reference in req; don't do a
fresh lookup.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-05-24 11:52:06 -07:00
Sage Weil 3c454cf216 ceph: use LOOKUPINO to make unconnected nfs fh more reliable
If we are unable to locate an inode by ino, ask the MDS using the new
LOOKUPINO command.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-05-24 11:52:05 -07:00
Sage Weil 9d6fcb081a ceph: check return value for start_request in writepages
Since we pass the nofail arg, we should never get an error; BUG if we do.
(And fix the function to not return an error if __map_request fails.)

Signed-off-by: Sage Weil <sage@newdream.net>
2011-05-19 11:25:05 -07:00
Sage Weil 6b4a3b517a ceph: remove useless check
rc is only ever 0 or negative in this method.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-05-19 11:25:05 -07:00
Sage Weil da39822c65 ceph: fix broken comparison in readdir loop
Both off and fi->offset are unsigned, so the difference is always >= 0.
Compare them directly instead of the sign of the difference.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-05-19 11:25:04 -07:00
Sage Weil 3540303f87 ceph: fix rare potential cap leak
If we grab new_cap, retake the lock, and find we already have a cap now
for the given mds, release new_cap.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-05-19 11:25:03 -07:00
Sage Weil ae59808301 ceph: use snprintf for dirstat content
We allocate a buffer for rstats if the dirstat option is enabled.  Use
snprintf.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-05-19 11:25:02 -07:00
Sage Weil 1b36698577 libceph: remove unused variable
Signed-off-by: Sage Weil <sage@newdream.net>
2011-05-19 11:24:17 -07:00
Sage Weil 3b66378034 ceph: take reference on mds request r_unsafe_dir
We put ourselves on an inode list for the parent directory of metadata
operations so that an fsync on the directory will wait for metadata updates
to commit to disk.  We weren't holding a reference to that directory,
however, and under certain workloads (fsstress in this case) the directory
can go away.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-05-19 11:20:07 -07:00
Henry C Chang d3d0720d4a ceph: do not use i_wrbuffer_ref as refcount for Fb cap
We increments i_wrbuffer_ref when taking the Fb cap. This breaks
the dirty page accounting and causes looping in
__ceph_do_pending_vmtruncate, and ceph client hangs.

This bug can be reproduced occasionally by running blogbench.

Add a new field i_wb_ref to inode and dedicate it to Fb reference
counting.

Signed-off-by: Henry C Chang <henry.cy.chang@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2011-05-11 10:44:48 -07:00
Henry C Chang a26a185d27 ceph: fix list_add in ceph_put_snap_realm
Signed-off-by: Henry C Chang <henry.cy.chang@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2011-05-11 10:44:36 -07:00
Henry C Chang 7d8e18a69d ceph: print debug message before put mds session
The mds session, s, could be freed during ceph_put_mds_session.
Move dout before ceph_put_mds_session.

Signed-off-by: Henry C Chang <henry.cy.chang@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2011-05-11 10:44:34 -07:00
Sage Weil fca65b4ad7 ceph: do not call __mark_dirty_inode under i_lock
The __mark_dirty_inode helper now takes i_lock as of 250df6ed.  Fix the
one ceph callers that held i_lock (__ceph_mark_dirty_caps) to return the
flags value so that the callers can do it outside of i_lock.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-05-04 12:56:45 -07:00
Henry C Chang 8c71897be2 ceph: handle ceph_osdc_new_request failure in ceph_writepages_start
We should unlock the page and return -ENOMEM if ceph_osdc_new_request
failed.

Signed-off-by: Henry C Chang <henry_c_chang@tcloudcomputing.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2011-05-03 09:28:12 -07:00
Sage Weil 3772d26d87 ceph: use ihold() when i_lock is held
See 0444d76ae6.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-05-03 09:28:08 -07:00
Linus Torvalds 42933bac11 Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6
* 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6:
  Fix common misspellings
2011-04-07 11:14:49 -07:00
Lucas De Marchi 25985edced Fix common misspellings
Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-03-31 11:26:23 -03:00
Linus Torvalds 50f3515828 Merge git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
* git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  libceph: Create a new key type "ceph".
  libceph: Get secret from the kernel keys api when mounting with key=NAME.
  ceph: Move secret key parsing earlier.
  libceph: fix null dereference when unregistering linger requests
  ceph: unlock on error in ceph_osdc_start_request()
  ceph: fix possible NULL pointer dereference
  ceph: flush msgr_wq during mds_client shutdown
2011-03-30 09:46:09 -07:00
Tommi Virtanen 8323c3aa74 ceph: Move secret key parsing earlier.
This makes the base64 logic be contained in mount option parsing,
and prepares us for replacing the homebew key management with the
kernel key retention service.

Signed-off-by: Tommi Virtanen <tommi.virtanen@dreamhost.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2011-03-29 12:11:16 -07:00
Dave Chinner 0444d76ae6 fs: don't use igrab() while holding i_lock
Fix the incorrect use of igrab() inside the i_lock in NFS and Ceph‥

If we are already holding the i_lock, we have a reference to the
inode so we can safely use ihold() to gain an extra reference. This
avoids hangs due to lock recursion on the i_lock now that the
inode_lock is gone and igrab() uses the i_lock itself.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Cc: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-29 07:50:34 -07:00
Sage Weil ef550f6f4f ceph: flush msgr_wq during mds_client shutdown
The release method for mds connections uses a backpointer to the
mds_client, so we need to flush the workqueue of any pending work (and
ceph_connection references) prior to freeing the mds_client.  This fixes
an oops easily triggered under UML by

 while true ; do mount ... ; umount ... ; done

Also fix an outdated comment: the flush in ceph_destroy_client only flushes
OSD connections out.  This bug is basically an artifact of the ceph ->
ceph+libceph conversion.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-03-25 13:27:48 -07:00
Sage Weil 147851d2dc ceph: rename dentry_release -> d_release, fix comment
Just for consistency's sake.  Fix obsolete comment too.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-03-21 12:24:26 -07:00
Henry C Chang 49bcb93236 ceph: add request to the tail of unsafe write list
In sync_write_wait(), we assume that the newest request is at the
tail of unsafe write list. We should maintain the semantics here.

Signed-off-by: Henry C Chang <henry_c_chang@tcloudcomputing.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2011-03-21 12:24:25 -07:00
Henry C Chang 78a255654f ceph: remove request from unsafe list if it is canceled/timed out
This fixes the list corruption warning like this:

------------[ cut here ]------------
WARNING: at lib/list_debug.c:30 __list_add+0x68/0x81()
Hardware name: X8DTU
list_add corruption. prev->next should be next (ffff880618931250), but was (null). (prev=ffff880c188b9130).
Modules linked in: nfsd lockd nfs_acl auth_rpcgss exportfs ceph libceph libcrc32c sunrpc ipv6 fuse igb i2c_i801 ioatdma i2c_core iTCO_wdt iTCO_vendor_support joydev dca serio_raw usb_storage [last unloaded: scsi_wait_scan]
Pid: 10977, comm: smbd Tainted: G        W  2.6.32.23-170.Elaster.xendom0.fc12.x86_64 #1
Call Trace:
[<ffffffff8105753c>] warn_slowpath_common+0x7c/0x94
[<ffffffff810575ab>] warn_slowpath_fmt+0x41/0x43
[<ffffffff812351a3>] __list_add+0x68/0x81
[<ffffffffa014799d>] ceph_aio_write+0x614/0x8a2 [ceph]
[<ffffffff8111d2a0>] do_sync_write+0xe8/0x125
[<ffffffff81075a1f>] ? autoremove_wake_function+0x0/0x39
[<ffffffff811f21ec>] ? selinux_file_permission+0x5c/0xb3
[<ffffffff811e8521>] ? security_file_permission+0x16/0x18
[<ffffffff8111d864>] vfs_write+0xae/0x10b
[<ffffffff8111d91b>] sys_pwrite64+0x5a/0x76
[<ffffffff81012d32>] system_call_fastpath+0x16/0x1b
---[ end trace 08573eb9f07ff6f4 ]---

Signed-off-by: Henry C Chang <henry_c_chang@tcloudcomputing.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2011-03-21 12:24:24 -07:00
Sage Weil 80456f8672 ceph: move readahead default to fs/ceph from libceph
Signed-off-by: Sage Weil <sage@newdream.net>
2011-03-21 12:24:23 -07:00
Yehuda Sadeh ad1fee96cb ceph: add ino32 mount option
The ino32 mount option forces the ceph fs to report 32 bit
ino values.  This is useful for 64 bit kernels with 32 bit userspace.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
2011-03-21 12:24:22 -07:00
Sage Weil 21f3b5f1bb ceph: remove debugfs debug cruft
Whoops!

Signed-off-by: Sage Weil <sage@newdream.net>
2011-03-21 12:24:20 -07:00
Sage Weil 09adc80c61 ceph: preserve I_COMPLETE across rename
d_move puts the renamed dentry at the end of d_subdirs, screwing with our
cached dentry directory offsets.  We were just clearing I_COMPLETE to avoid
any possibility of trouble.  However, assigning the renamed dentry an
offset at the end of the directory (to match it's new d_subdirs position)
is sufficient to maintain correct behavior and hold onto I_COMPLETE.

This is especially important for workloads like rsync, which renames files
into place.  Before, we would lose I_COMPLETE and do MDS lookups for each
file.  With this patch we only talk to the MDS on create and rename.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-03-15 09:14:03 -07:00
Al Viro 0eb980e317 ceph: fix d_revalidate oopsen on NFS exports
can't blindly check nd->flags in ->d_revalidate()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-03-10 03:44:05 -05:00
Sage Weil 455cec0abf ceph: no .snap inside of snapped namespace
Otherwise you can do things like

# mkdir .snap/foo
# cd .snap/foo/.snap
# ls
<badness>

Signed-off-by: Sage Weil <sage@newdream.net>
2011-03-04 12:25:09 -08:00
Sage Weil 16a8b70a5a ceph: do not clear I_COMPLETE from d_release
First, this was racy anyway: d_release isn't called until well after the
dentry is unhashed.  Second, this runs afoul of the recent dcache change
that clears d_parent prior to calling d_release (949854d0), causing a NULL
pointer dereference.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-03-03 10:09:52 -08:00
Sage Weil b545cc1505 ceph: do not set I_COMPLETE
Do not set the I_COMPLETE flag on directories until we resolve races with
dcache pruning.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-03-03 10:09:51 -08:00
Sage Weil 9bde178d05 Revert "ceph: keep reference to parent inode on ceph_dentry"
This reverts commit 97d79b403e.

This fails to account for d_parent changes due to rename or disconnected
dentries due to submounts or NFS reexports.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-03-03 10:09:50 -08:00
Linus Torvalds 8bd89ca220 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  ceph: keep reference to parent inode on ceph_dentry
  ceph: queue cap_snaps once per realm
  libceph: fix socket write error handling
  libceph: fix socket read error handling
2011-02-21 15:01:38 -08:00
Yehuda Sadeh 97d79b403e ceph: keep reference to parent inode on ceph_dentry
When creating a new dentry we now hold a reference to the parent
inode in the ceph_dentry.  This is required due to the new RCU
changes from 949854d0, which set dentry->d_parent to NULL in d_kill before
calling the ->release() callback.  If/when that behavior is changed, we can
revert this hack.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2011-02-19 19:59:14 -08:00
Sage Weil e8e1ba96b2 ceph: queue cap_snaps once per realm
We were forming a dirty list, and then queueing cap_snaps for each realm
_and_ its children, regardless of whether the children were already in the
dirty list.  This meant we did it twice for some realms.  Which in turn
meant we corrupted mdsc->snap_flush_list when the cap_snap was re-added to
the list it was already on, and could trigger an infinite loop.

We were also using recursion to do reach all the children, a no-no when
stack is limited.

Instead, (re)queue any children on the dirty list, avoiding processing
anything twice and avoiding any recursion.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-02-04 20:45:58 -08:00
Linus Torvalds b12ece7d85 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  ceph: avoid picking MDS that is not active
  ceph: avoid immediate cap check after import
  ceph: fix flushing of caps vs cap import
  ceph: fix erroneous cap flush to non-auth mds
  ceph: fix cap_wanted_delay_{min,max} mount option initialization
  ceph: fix xattr rbtree search
  ceph: fix getattr on directory when using norbytes
2011-01-28 12:12:58 +10:00
Sage Weil d66bbd441c ceph: avoid picking MDS that is not active
Ignore replication or auth frag data if it indicates an MDS that is not
active.  This can happen if the MDS shuts down and the client has stale
data about the namespace distribution across the MDS cluster.  If that's
the case, fall back to directing the request based on the auth cap (which
should always be accurate).

Signed-off-by: Sage Weil <sage@newdream.net>
2011-01-25 08:16:37 -08:00
Sage Weil 7e57b81c76 ceph: avoid immediate cap check after import
The NODELAY flag avoids the heuristics that delay cap (issued/wanted)
release.  There's no reason for that after we import a cap, and it kills
whatever benefit we get from those delays.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-01-19 09:23:26 -08:00
Sage Weil 088b3f5e9e ceph: fix flushing of caps vs cap import
If we are mid-flush and a cap is migrated to another node, we need to
resend the cap flush message to the new MDS, and do so with the original
flush_seq to avoid leaking across a sync boundary.  Previously we didn't
redo the flush (we only flushed newly dirty data), which would cause a
later sync to hang forever.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-01-19 09:23:25 -08:00
Sage Weil 24be0c4810 ceph: fix erroneous cap flush to non-auth mds
The int flushing is global and not clear on each iteration of the loop,
which can cause a second flush of caps to any MDSs with ids greater than
the auth.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-01-19 09:23:24 -08:00
Sage Weil 50aac4fec5 ceph: fix cap_wanted_delay_{min,max} mount option initialization
These were initialized to 0 instead of the default, fallout from the RBD
refactor in 3d14c5d2b6.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-01-19 09:23:22 -08:00
Sage Weil 17db143fc0 ceph: fix xattr rbtree search
Fix xattr name comparison in rbtree search for strings that share a prefix.
The *name argument is null terminated, but the xattr name is not, so we
need to use strncmp, but that means adjusting for the case where name is
a prefix of xattr->name.

The corresponding case in __set_xattr() already handles this properly
(although in that case *name is also not null terminated).

Reported-by: Sergiy Kibrik <sakib@meta.ua>
Signed-off-by: Sage Weil <sage@newdream.net>
2011-01-13 15:50:11 -08:00
Yehuda Sadeh 1c1266bb91 ceph: fix getattr on directory when using norbytes
The norbytes mount option was broken, and when doing getattr
on a directory it return the rbytes instead of the number of
entities. This commit fixes it.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2011-01-13 15:50:06 -08:00
Linus Torvalds a170315420 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  rbd: fix cleanup when trying to mount inexistent image
  net/ceph: make ceph_msgr_wq non-reentrant
  ceph: fsc->*_wq's aren't used in memory reclaim path
  ceph: Always free allocated memory in osdmap_decode()
  ceph: Makefile: Remove unnessary code
  ceph: associate requests with opening sessions
  ceph: drop redundant r_mds field
  ceph: implement DIRLAYOUTHASH feature to get dir layout from MDS
  ceph: add dir_layout to inode
2011-01-13 10:25:24 -08:00
Tejun Heo 01e6acc4ea ceph: fsc->*_wq's aren't used in memory reclaim path
fsc->*_wq's aren't depended upon during memory reclaim.  Convert to
alloc_workqueue() w/o WQ_MEM_RECLAIM.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Sage Weil <sage@newdream.net>
Cc: ceph-devel@vger.kernel.org
Signed-off-by: Sage Weil <sage@newdream.net>
2011-01-12 15:15:14 -08:00
Tracey Dent 582c86e690 ceph: Makefile: Remove unnessary code
Remove the if and else conditional because the code is in mainline and there
is no need in it being there.

Also, Changed Makefile to use <modules>-y instead of <modules>-objs
because -objs is deprecated and not mentioned in
 Documentation/kbuild/makefiles.txt.

Signed-off-by: Tracey Dent <tdent48227@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2011-01-12 15:15:13 -08:00
Sage Weil dc69e2e9fc ceph: associate requests with opening sessions
Associate request with sessions that aren't yep open.  This makes the
debugfs mdsc request list more informative.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-01-12 15:15:13 -08:00
Sage Weil 4af25fdda6 ceph: drop redundant r_mds field
The r_mds field is redundant, since we can find the same information at
r_session->s_mds, and when r_session is NULL then r_mds is meaningless.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-01-12 15:15:13 -08:00
Sage Weil 14303d20f3 ceph: implement DIRLAYOUTHASH feature to get dir layout from MDS
This implements the DIRLAYOUTHASH protocol feature, which passes the dir
layout over the wire from the MDS.  This gives the client knowledge
of the correct hash function to use for mapping dentries among dir
fragments.

Note that if this feature is _not_ present on the client but is on the
MDS, the client may misdirect requests.  This will result in a forward
and degrade performance.  It may also result in inaccurate NFS filehandle
generation, which will prevent fh resolution when the inode is not present
in the client cache and the parent directories have been fragmented.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-01-12 15:15:13 -08:00
Sage Weil 6c0f3af72c ceph: add dir_layout to inode
Add a ceph_dir_layout to the inode, and calculate dentry hash values based
on the parent directory's specified dir_hash function.  This is needed
because the old default Linux dcache hash function is extremely week and
leads to a poor distribution of files among dir fragments.

Signed-off-by: Sage Weil <sage@newdream.net>
2011-01-12 15:15:12 -08:00
Nick Piggin b74c79e993 fs: provide rcu-walk aware permission i_ops
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
2011-01-07 17:50:29 +11:00
Nick Piggin 34286d6662 fs: rcu-walk aware d_revalidate method
Require filesystems be aware of .d_revalidate being called in rcu-walk
mode (nd->flags & LOOKUP_RCU). For now do a simple push down, returning
-ECHILD from all implementations.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
2011-01-07 17:50:29 +11:00
Nick Piggin fb045adb99 fs: dcache reduce branches in lookup path
Reduce some branches and memory accesses in dcache lookup by adding dentry
flags to indicate common d_ops are set, rather than having to check them.
This saves a pointer memory access (dentry->d_op) in common path lookup
situations, and saves another pointer load and branch in cases where we
have d_op but not the particular operation.

Patched with:

git grep -E '[.>]([[:space:]])*d_op([[:space:]])*=' | xargs sed -e 's/\([^\t ]*\)->d_op = \(.*\);/d_set_d_op(\1, \2);/' -e 's/\([^\t ]*\)\.d_op = \(.*\);/d_set_d_op(\&\1, \2);/' -i

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
2011-01-07 17:50:28 +11:00
Nick Piggin fa0d7e3de6 fs: icache RCU free inodes
RCU free the struct inode. This will allow:

- Subsequent store-free path walking patch. The inode must be consulted for
  permissions when walking, so an RCU inode reference is a must.
- sb_inode_list_lock to be moved inside i_lock because sb list walkers who want
  to take i_lock no longer need to take sb_inode_list_lock to walk the list in
  the first place. This will simplify and optimize locking.
- Could remove some nested trylock loops in dcache code
- Could potentially simplify things a bit in VM land. Do not need to take the
  page lock to follow page->mapping.

The downsides of this is the performance cost of using RCU. In a simple
creat/unlink microbenchmark, performance drops by about 10% due to inability to
reuse cache-hot slab objects. As iterations increase and RCU freeing starts
kicking over, this increases to about 20%.

In cases where inode lifetimes are longer (ie. many inodes may be allocated
during the average life span of a single inode), a lot of this cache reuse is
not applicable, so the regression caused by this patch is smaller.

The cache-hot regression could largely be avoided by using SLAB_DESTROY_BY_RCU,
however this adds some complexity to list walking and store-free path walking,
so I prefer to implement this at a later date, if it is shown to be a win in
real situations. I haven't found a regression in any non-micro benchmark so I
doubt it will be a problem.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
2011-01-07 17:50:26 +11:00
Nick Piggin b5c84bf6f6 fs: dcache remove dcache_lock
dcache_lock no longer protects anything. remove it.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
2011-01-07 17:50:23 +11:00
Nick Piggin 2fd6b7f507 fs: dcache scale subdirs
Protect d_subdirs and d_child with d_lock, except in filesystems that aren't
using dcache_lock for these anyway (eg. using i_mutex).

Note: if we change the locking rule in future so that ->d_child protection is
provided only with ->d_parent->d_lock, it may allow us to reduce some locking.
But it would be an exception to an otherwise regular locking scheme, so we'd
have to see some good results. Probably not worthwhile.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
2011-01-07 17:50:21 +11:00
Nick Piggin da5029563a fs: dcache scale d_unhashed
Protect d_unhashed(dentry) condition with d_lock. This means keeping
DCACHE_UNHASHED bit in synch with hash manipulations.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
2011-01-07 17:50:21 +11:00
Nick Piggin b7ab39f631 fs: dcache scale dentry refcount
Make d_count non-atomic and protect it with d_lock. This allows us to ensure a
0 refcount dentry remains 0 without dcache_lock. It is also fairly natural when
we start protecting many other dentry members with d_lock.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
2011-01-07 17:50:21 +11:00
Henry C Chang b6aa5901c7 ceph: mark user pages dirty on direct-io reads
For read operation, we have to set the argument _write_ of get_user_pages
to 1 since we will write data to pages. Also, we need to SetPageDirty before
releasing these pages.

Signed-off-by: Henry C Chang <henry_c_chang@tcloudcomputing.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-12-17 09:54:40 -08:00
Sage Weil 92cf765237 ceph: fix null pointer dereference in ceph_init_dentry for nfs reexport
The fh_to_dentry etc. methods use ceph_init_dentry(), which assumes that
d_parent is defined.  It isn't for those callers, so check!

Signed-off-by: Sage Weil <sage@newdream.net>
2010-12-17 09:53:48 -08:00
Henry C Chang ab226e21ad ceph: fix direct-io on non-page-aligned buffers
The user buffer may be 512-byte aligned, not page-aligned.  We were
assuming the buffer was page-aligned and only accounting for
non-page-aligned io offsets.

Signed-off-by: Henry C Chang <henry_c_chang@tcloudcomputing.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-12-15 20:46:16 -08:00
Sage Weil 1cd275f609 ceph: fix ioctl magic
The ioctl magic was inadvertently changed in 571dba52.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-12-06 09:45:22 -08:00
Herb Shiu a5b10629ed ceph: Behave better when handling file lock replies.
Fill in the local lock with response data if appropriate,
and don't call posix_lock_file when reading locks.

Signed-off-by: Herb Shiu <herb_shiu@tcloudcomputing.com>
Acked-by: Greg Farnum <gregf@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-12-01 14:22:34 -08:00
Herb Shiu 637ae8d547 ceph: pass lock information by struct file_lock instead of as individual params.
Signed-off-by: Herb Shiu <herb_shiu@tcloudcomputing.com>
Acked-by: Greg Farnum <gregf@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-12-01 14:22:34 -08:00
Herb Shiu 25933abdd8 ceph: Handle file locks in replies from the MDS.
Previously the kernel client incorrectly assumed everything was a directory.

Signed-off-by: Herb Shiu <herb_shiu@tcloudcomputing.com>
Acked-by: Greg Farnum <gregf@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-12-01 14:22:27 -08:00
Sage Weil 884ea89276 ceph: avoid possible null deref in readdir after dir llseek
last may be NULL, but we dereference it in the else branch without
checking.  Normally it doesn't trigger because last == NULL when fpos == 2,
but it could happen on a newly opened dir if the user seeks forward.

Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-12-01 14:15:31 -08:00
Linus Torvalds 76db8ac45f Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  ceph: fix readdir EOVERFLOW on 32-bit archs
  ceph: fix frag offset for non-leftmost frags
  ceph: fix dangling pointer
  ceph: explicitly specify page alignment in network messages
  ceph: make page alignment explicit in osd interface
  ceph: fix comment, remove extraneous args
  ceph: fix update of ctime from MDS
  ceph: fix version check on racing inode updates
  ceph: fix uid/gid on resent mds requests
  ceph: fix rdcache_gen usage and invalidate
  ceph: re-request max_size if cap auth changes
  ceph: only let auth caps update max_size
  ceph: fix open for write on clustered mds
  ceph: fix bad pointer dereference in ceph_fill_trace
  ceph: fix small seq message skipping
  Revert "ceph: update issue_seq on cap grant"
2010-11-19 15:32:22 -08:00
Sage Weil 3105c19c45 ceph: fix readdir EOVERFLOW on 32-bit archs
One of the readdir filldir_t callers was passing the raw ceph 64-bit ino
instead of the hashed 32-bit one, producing an EOVERFLOW in the filler
callback.  Fix this by calling the ceph_vino_to_ino() helper to do the
conversion.

Reported-by: Jan Smets <jan.smets@alcatel-lucent.com>
Tested-by: Jan Smets <jan.smets@alcatel-lucent.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-11-18 09:15:07 -08:00
Arnd Bergmann 451a3c24b0 BKL: remove extraneous #include <smp_lock.h>
The big kernel lock has been removed from all these files at some point,
leaving only the #include.

Remove this too as a cleanup.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-17 08:59:32 -08:00
Sage Weil 7b88dadc13 ceph: fix frag offset for non-leftmost frags
We start at offset 2 for the leftmost frag, and 0 for subsequent frags.
When we reach the end (rightmost), we go back to 2.  This fixes readdir on
fragmented (large) directories.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-11-11 16:48:59 -08:00
Sage Weil a1629c3b24 ceph: fix dangling pointer
Clear fi->last_name when it's freed.  The only caller is rewinddir() (or
equivalent lseek).

Signed-off-by: Sage Weil <sage@newdream.net>
2010-11-11 15:24:06 -08:00
Sage Weil b7495fc2ff ceph: make page alignment explicit in osd interface
We used to infer alignment of IOs within a page based on the file offset,
which assumed they matched.  This broke with direct IO that was not aligned
to pages (e.g., 512-byte aligned IO).  We were also trusting the alignment
specified in the OSD reply, which could have been adjusted by the server.

Explicitly specify the page alignment when setting up OSD IO requests.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-11-09 12:43:12 -08:00
Sage Weil e98b6fed84 ceph: fix comment, remove extraneous args
The offset/length arguments aren't used.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-11-09 12:24:53 -08:00
Sage Weil d8672d64b8 ceph: fix update of ctime from MDS
The client can have a newer ctime than the MDS due to AUTH_EXCL and
XATTR_EXCL caps as well; update the check in ceph_fill_file_time
appropriately.

This fixes cases where ctime/mtime goes backward under the right sequence
of local updates (e.g. chmod) and mds replies (e.g. subsequent stat that
goes to the MDS).

Signed-off-by: Sage Weil <sage@newdream.net>
2010-11-08 09:24:34 -08:00
Sage Weil 8bd59e0188 ceph: fix version check on racing inode updates
We may get updates on the same inode from multiple MDSs; generally we only
pay attention if the update is newer than what we already have.  The
exception is when an MDS sense unstable information, in which case we
always update.

The old > check got this wrong when our version was odd (e.g. 3) and the
reply version was even (e.g. 2): the older stale (v2) info would be
applied.  Fixed and clarified the comment.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-11-08 09:23:12 -08:00
Sage Weil cb4276cca4 ceph: fix uid/gid on resent mds requests
MDS requests can be rebuilt and resent in non-process context, but were
filling in uid/gid from current_fsuid/gid.  Put that information in the
request struct on request setup.

This fixes incorrect (and root) uid/gid getting set for requests that
are forwarded between MDSs, usually due to metadata migrations.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-11-08 07:29:05 -08:00
Sage Weil cd045cb42a ceph: fix rdcache_gen usage and invalidate
We used to use rdcache_gen to indicate whether we "might" have cached
pages.  Now we just look at the mapping to determine that.  However, some
old behavior remains from that transition.

First, rdcache_gen == 0 no longer means we have no pages.  That can happen
at any time (presumably when we carry FILE_CACHE).  We should not reset it
to zero, and we should not check that it is zero.

That means that the only purpose for rdcache_revoking is to resolve races
between new issues of FILE_CACHE and an async invalidate.  If they are
equal, we should invalidate.  On success, we decrement rdcache_revoking,
so that it is no longer equal to rdcache_gen.  Similarly, if we success
in doing a sync invalidate, set revoking = gen - 1.  (This is a small
optimization to avoid doing unnecessary invalidate work and does not
affect correctness.)

Signed-off-by: Sage Weil <sage@newdream.net>
2010-11-08 07:29:05 -08:00
Sage Weil feb4cc9bb4 ceph: re-request max_size if cap auth changes
If the auth cap migrates to another MDS, clear requested_max_size so that
we resend any pending max_size increase requests.  This fixes potential
hangs on writes that extend a file and race with an cap migration between
MDSs.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-11-07 09:39:23 -08:00
Sage Weil 912a9b0319 ceph: only let auth caps update max_size
Only the auth MDS has a meaningful max_size value for us, so only update it
in fill_inode if we're being issued an auth cap.  Otherwise, a random
stat result from a non-auth MDS can clobber a meaningful max_size, get
the client<->mds cap state out of sync, and make writes hang.

Specifically, even if the client re-requests a larger max_size (which it
will), the MDS won't respond because as far as it knows we already have a
sufficiently large value.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-11-07 09:39:21 -08:00
Sage Weil 7421ab8041 ceph: fix open for write on clustered mds
Normally when we open a file we already have a cap, and simply update the
wanted set.  However, if we open a file for write, but don't have an auth
cap, that doesn't work; we need to open a new cap with the auth MDS.  Only
reuse existing caps if we are opening for read or the existing cap is auth.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-11-07 09:07:15 -08:00
Sage Weil d8b16b3d1c ceph: fix bad pointer dereference in ceph_fill_trace
We dereference *in a few lines down, but only set it on rename.  It is
apparently pretty rare for this to trigger, but I have been hitting it
with a clustered MDSs.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-11-07 08:40:43 -08:00
Al Viro a7f9fb205a convert ceph
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-10-29 04:17:18 -04:00
Sage Weil 2f56f56ad9 Revert "ceph: update issue_seq on cap grant"
This reverts commit d91f2438d8.

The intent of issue_seq is to distinguish between mds->client messages that
(re)create the cap and those that do not, which means we should _only_ be
updating that value in the create paths.  By updating it in handle_cap_grant,
we reset it to zero, which then breaks release.

The larger question is what workload/problem made me think it should be
updated here...

Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-27 21:05:54 -07:00
Wu Fengguang 1b430beee5 writeback: remove nonblocking/encountered_congestion references
This removes more dead code that was somehow missed by commit 0d99519efe
(writeback: remove unused nonblocking and congestion checks).  There are
no behavior change except for the removal of two entries from one of the
ext4 tracing interface.

The nonblocking checks in ->writepages are no longer used because the
flusher now prefer to block on get_request_wait() than to skip inodes on
IO congestion.  The latter will lead to more seeky IO.

The nonblocking checks in ->writepage are no longer used because it's
redundant with the WB_SYNC_NONE check.

We no long set ->nonblocking in VM page out and page migration, because
a) it's effectively redundant with WB_SYNC_NONE in current code
b) it's old semantic of "Don't get stuck on request queues" is mis-behavior:
   that would skip some dirty inodes on congestion and page out others, which
   is unfair in terms of LRU age.

Inspired by Christoph Hellwig. Thanks!

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: David Howells <dhowells@redhat.com>
Cc: Sage Weil <sage@newdream.net>
Cc: Steve French <sfrench@samba.org>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26 16:52:05 -07:00
Sage Weil efa4c1206e ceph: do not carry i_lock for readdir from dcache
We were taking dcache_lock inside of i_lock, which introduces a dependency
not found elsewhere in the kernel, complicationg the vfs locking
scalability work.  Since we don't actually need it here anyway, remove
it.

We only need i_lock to test for the I_COMPLETE flag, so be careful to do
so without dcache_lock held.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-20 15:38:27 -07:00
Julia Lawall 61413c2f59 fs/ceph/xattr.c: Use kmemdup
Convert a sequence of kmalloc and memcpy to use kmemdup.

The semantic patch that performs this transformation is:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression a,flag,len;
expression arg,e1,e2;
statement S;
@@

  a =
-  \(kmalloc\|kzalloc\)(len,flag)
+  kmemdup(arg,len,flag)
  <... when != a
  if (a == NULL || ...) S
  ...>
- memcpy(a,arg,len+1);
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-20 15:38:26 -07:00
Greg Farnum 571dba52a3 ceph: add CEPH_MDS_OP_SETDIRLAYOUT and associated ioctl.
Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-20 15:38:23 -07:00
Randy Dunlap 6f453ed6c0 ceph: fix debugfs warnings
Include "super.h" outside of CONFIG_DEBUG_FS to eliminate a compiler warning:

fs/ceph/debugfs.c:266: warning: 'struct ceph_fs_client' declared inside parameter list
fs/ceph/debugfs.c:266: warning: its scope is only this definition or declaration, which is probably not what you want
fs/ceph/debugfs.c:271: warning: 'struct ceph_fs_client' declared inside parameter list

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
2010-10-20 15:38:21 -07:00
Sage Weil 496e59553c ceph: switch from BKL to lock_flocks()
Switch from using the BKL explicitly to the new lock_flocks() interface.
Eventually this will turn into a spinlock.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-20 15:38:18 -07:00
Greg Farnum fca4451acf ceph: preallocate flock state without locks held
When the lock_kernel() turns into lock_flocks() and a spinlock, we won't
be able to do allocations with the lock held.  Preallocate space without
the lock, and retry if the lock state changes out from underneath us.

Signed-off-by: Greg Farnum <gregf@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-20 15:38:17 -07:00
Sage Weil 18a38193ef ceph: use mapping->nrpages to determine if mapping is empty
This is simpler and faster.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-20 15:38:15 -07:00
Sage Weil 93afd449aa ceph: only invalidate on check_caps if we actually have pages
The i_rdcache_gen value only implies we MAY have cached pages; actually
check the mapping to see if it's worth bothering with an invalidate.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-20 15:38:15 -07:00
Sage Weil 4c32f5dda5 ceph: do not hide .snap in root directory
Snaps in the root directory are now supported by the MDS, and harmless on
older versions.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-20 15:38:14 -07:00
Yehuda Sadeh 3d14c5d2b6 ceph: factor out libceph from Ceph file system
This factors out protocol and low-level storage parts of ceph into a
separate libceph module living in net/ceph and include/linux/ceph.  This
is mostly a matter of moving files around.  However, a few key pieces
of the interface change as well:

 - ceph_client becomes ceph_fs_client and ceph_client, where the latter
   captures the mon and osd clients, and the fs_client gets the mds client
   and file system specific pieces.
 - Mount option parsing and debugfs setup is correspondingly broken into
   two pieces.
 - The mon client gets a generic handler callback for otherwise unknown
   messages (mds map, in this case).
 - The basic supported/required feature bits can be expanded (and are by
   ceph_fs_client).

No functional change, aside from some subtle error handling cases that got
cleaned up in the refactoring process.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-20 15:37:28 -07:00
Yehuda Sadeh ae1533b62b ceph-rbd: osdc support for osd call and rollback operations
This will be used for rbd snapshots administration.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
2010-10-20 15:37:25 -07:00
Yehuda Sadeh 68b4476b0b ceph: messenger and osdc changes for rbd
Allow the messenger to send/receive data in a bio.  This is added
so that we wouldn't need to copy the data into pages or some other buffer
when doing IO for an rbd block device.

We can now have trailing variable sized data for osd
ops.  Also osd ops encoding is more modular.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-20 15:37:18 -07:00
Yehuda Sadeh 3499e8a5d4 ceph: refactor osdc requests creation functions
The osd requests creation are being decoupled from the
vino parameter, allowing clients using the osd to use
other arbitrary object names that are not necessarily
vino based. Also, calc_raw_layout now takes a snap id.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-20 15:36:01 -07:00
Yehuda Sadeh 7669a2c95e ceph: lookup pool in osdmap by name
Implement a pool lookup by name.  This will be used by rbd.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-20 15:35:36 -07:00
Sage Weil d91f2438d8 ceph: update issue_seq on cap grant
We need to update the issue_seq on any grant operation, be it via an MDS
reply or a separate grant message.  The update in the grant path was
missing.  This broke cap release for inodes in which the MDS sent an
explicit grant message that was not soon after followed by a successful
MDS reply on the same inode.

Also fix the signedness on seq locals.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-07 08:01:50 -07:00
Greg Farnum 21b559de56 ceph: send cap release message early on failed revoke.
If an MDS tries to revoke caps that we don't have, we want to send
releases early since they probably contain the caps message the MDS
is looking for.

Previously, we only sent the messages if we didn't have the inode either. But
in a multi-mds system we can retain the inode after dropping all caps for
a single MDS.

Signed-off-by: Greg Farnum <gregf@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-07 08:00:24 -07:00
Aneesh Kumar K.V bba0cd0e3d ceph: Update max_len with minimum required size
encode_fh on error should update max_len with minimum required
size, so that caller can redo the call with the reallocated buffer.
This is required with open by handle patch series

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-07 08:00:24 -07:00
Aneesh Kumar K.V 92923dcbfc ceph: Fix return value of encode_fh function
encode_fh function should return 255 on error as done by other file
system to indicate EOVERFLOW. Also max_len is in sizeof(u32) units
and not in bytes.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-07 08:00:23 -07:00
Sage Weil 6bc18876ba ceph: avoid null deref in osd request error path
If we interrupt an osd request, we call __cancel_request, but it wasn't
verifying that req->r_osd was non-NULL before dereferencing it.  This could
cause a crash if osds were flapping and we aborted a request on said osd.

Reported-by: Henry C Chang <henry_c_chang@tcloudcomputing.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-07 08:00:23 -07:00
Henry C Chang 936aeb5c4a ceph: fix list_add usage on unsafe_writes list
Fix argument order.

Signed-off-by: Henry C Chang <henry_c_chang@tcloudcomputing.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-07 08:00:23 -07:00
Sage Weil be4f104dfd ceph: select CRYPTO
We select CRYPTO_AES, but not CRYPTO.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-09-17 12:30:31 -07:00
Sage Weil a43fb73101 ceph: check mapping to determine if FILE_CACHE cap is used
See if the i_data mapping has any pages to determine if the FILE_CACHE
capability is currently in use, instead of assuming it is any time the
rdcache_gen value is set (i.e., issued -> used).

This allows the MDS RECALL_STATE process work for inodes that have cached
pages.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-09-17 09:54:31 -07:00
Sage Weil e835124c2b ceph: only send one flushsnap per cap_snap per mds session
Sending multiple flushsnap messages is problematic because we ignore
the response if the tid doesn't match, and the server may only respond to
each one once.  It's also a waste.

So, skip cap_snaps that are already on the flushing list, unless the caller
tells us to resend (because we are reconnecting).

Signed-off-by: Sage Weil <sage@newdream.net>
2010-09-17 08:03:08 -07:00
Sage Weil ae00d4f37f ceph: fix cap_snap and realm split
The cap_snap creation/queueing relies on both the current i_head_snapc
_and_ the i_snap_realm pointers being correct, so that the new cap_snap
can properly reference the old context and the new i_head_snapc can be
updated to reference the new snaprealm's context.  To fix this, we:

 - move inodes completely to the new (split) realm so that i_snap_realm
   is correct, and
 - generate the new snapc's _before_ queueing the cap_snaps in
   ceph_update_snap_trace().

Signed-off-by: Sage Weil <sage@newdream.net>
2010-09-16 16:26:51 -07:00
Sage Weil cfc0bf6640 ceph: stop sending FLUSHSNAPs when we hit a dirty capsnap
Stop sending FLUSHSNAP messages when we hit a capsnap that has dirty_pages
or is still writing.  We'll send the newer capsnaps only after the older
ones complete.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-09-14 15:50:59 -07:00
Sage Weil 8bef9239ee ceph: correctly set 'follows' in flushsnap messages
The 'follows' should match the seq for the snap context for the given snap
cap, which is the context under which we have been dirtying and writing
data and metadata.  The snapshot that _contains_ those updates thus
_follows_ that context's seq #.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-09-14 15:45:44 -07:00
Sage Weil 467c525109 ceph: fix dn offset during readdir_prepopulate
When adding the readdir results to the cache, ceph_set_dentry_offset was
clobbered our just-set offset.  This can cause the readdir result offsets
to get out of sync with the server.  Add an argument to the helper so
that it does not.

This bug was introduced by 1cd3935bed.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-09-13 11:40:36 -07:00
Sage Weil a77d9f7dce ceph: fix file offset wrapping at 4GB on 32-bit archs
Cast the value before shifting so that we don't run out of bits with a
32-bit unsigned long.  This fixes wrapping of high file offsets into the
low 4GB of a file on disk, and the subsequent data corruption for large
files.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-09-11 10:55:25 -07:00
Sage Weil 3612abbd5d ceph: fix reconnect encoding for old servers
Fix the reconnect encoding to encode the cap record when the MDS does not
have the FLOCK capability (i.e., pre v0.22).

Signed-off-by: Sage Weil <sage@newdream.net>
2010-09-11 10:52:47 -07:00
Yehuda Sadeh 3d4401d9d0 ceph: fix pagelist kunmap tail
A wrong parameter was passed to the kunmap.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-09-11 10:52:47 -07:00
Sage Weil ca04d9c3ec ceph: fix null pointer deref on anon root dentry release
When we release a root dentry, particularly after a splice, the parent
(actually our) inode was evaluating to NULL and was getting dereferenced
by ceph_snap().  This is reproduced by something as simple as

 mount -t ceph monhost:/a/b mnt
 mount -t ceph monhost:/a mnt2
 ls mnt2

A splice_dentry() would kill the old 'b' inode's root dentry, and we'd
crash while releasing it.

Fix by checking for both the ROOT and NULL cases explicitly.  We only need
to invalidate the parent dir when we have a correct parent to invalidate.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-09-11 10:52:47 -07:00
Dan Carpenter b545787dbb ceph: fix get_ticket_handler() error handling
get_ticket_handler() returns a valid pointer or it returns
ERR_PTR(-ENOMEM) if kzalloc() fails.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-26 09:26:50 -07:00
Sage Weil e072f8aa35 ceph: don't BUG on ENOMEM during mds reconnect
We are in a position to return an error; do that instead.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-26 09:26:37 -07:00
Dan Carpenter f44c3890d9 ceph: ceph_mdsc_build_path() returns an ERR_PTR
ceph_mdsc_build_path() returns an ERR_PTR but this code is set up to
handle NULL returns.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-26 09:24:28 -07:00
Alan Cox ad8453ab0a ceph: Fix warnings
Just scrubbing some warnings so I can see real problem ones in the build
noise. For 32bit we need to coax gcc politely into believing we really
honestly intend to the casts. Using (u64)(unsigned long) means we cast from
a pointer to a type of the right size and then extend it. This stops the
warning spew.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-25 12:02:14 -07:00
Dan Carpenter ac1f12ef56 ceph: ceph_get_inode() returns an ERR_PTR
ceph_get_inode() returns an ERR_PTR and it doesn't return a NULL.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-25 12:01:54 -07:00
Sage Weil 36e21687e6 ceph: initialize fields on new dentry_infos
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-24 16:24:19 -07:00
Sage Weil 7d8cb26d7d ceph: maintain i_head_snapc when any caps are dirty, not just for data
We used to use i_head_snapc to keep track of which snapc the current epoch
of dirty data was dirtied under.  It is used by queue_cap_snap to set up
the cap_snap.  However, since we queue cap snaps for any dirty caps, not
just for dirty file data, we need to keep a valid i_head_snapc anytime
we have dirty|flushing caps.  This fixes a NULL pointer deref in
queue_cap_snap when writing back dirty caps without data (e.g.,
snaptest-authwb.sh).

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-24 16:24:18 -07:00
Henry C Chang 07a27e226d ceph: fix osd request lru adjustment when sending request
Fix argument order.  We want to move the item to the end of the list, not
change the position of the head.

Signed-off-by: Henry C Chang <henry_c_chang@tcloudcomputing.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-22 21:34:27 -07:00
Sage Weil 124514918b ceph: don't improperly set dir complete when holding EXCL cap
If we hold the EXCL cap, we cannot trust the dir stats from the MDS (num
files, subdirs) and must not incorrectly conclude that the directory is
empty.  If we do, we get can bad results from lookup (bad ENOENT) and
bad readdir results.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-22 21:33:32 -07:00
Michael Rubin 679ceace84 mm: exporting account_page_dirty
This allows code outside of the mm core to safely manipulate page state
and not worry about the other accounting. Not using these routines means
that some code will lose track of the accounting and we get bugs. This
has happened once already.

Signed-off-by: Michael Rubin <mrubin@google.com>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-22 15:16:51 -07:00
Sage Weil eb6bb1c5bd ceph: direct requests in snapped namespace based on nonsnap parent
When making a request in the virtual snapdir or a snapped portion of the
namespace, we should choose the MDS based on the first nonsnap parent (and
its caps).  If that is not the best place, we will get forward hints to
find the right MDS in the cluster.  This fixes ESTALE errors when using
the .snap directory and namespace with multiple MDSs.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-22 15:16:48 -07:00
Sage Weil ed32604448 ceph: queue cap snap writeback for realm children on snap update
When a realm is updated, we need to queue writeback on inodes in that
realm _and_ its children.  Otherwise, if the inode gets cowed on the
server, we can get a hang later due to out-of-sync cap/snap state.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-22 15:16:47 -07:00
Sage Weil 4a625be472 ceph: include dirty xattrs state in snapped caps
When we snapshot dirty metadata that needs to be written back to the MDS,
include dirty xattr metadata.  Make the capsnap reference the encoded
xattr blob so that it will be written back in the FLUSHSNAP op.

Also fix the capsnap creation guard to include dirty auth or file bits,
not just tests specific to dirty file data or file writes in progress
(this fixes auth metadata writeback).

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-22 15:16:46 -07:00
Sage Weil 082afec92d ceph: fix xattr cap writeback
We should include the xattr metadata blob in the cap update message any
time we are flushing dirty state, NOT just when we are also dropping the
cap.  This fixes async xattr writeback.

Also, clean up the code slightly to avoid duplicating the bit test.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-22 15:16:41 -07:00
Sage Weil f3c60c5918 ceph: fix multiple mds session shutdown
The use of a completion when waiting for session shutdown during umount is
inappropriate, given the complexity of the condition.  For multiple MDS's,
this resulted in the umount thread spinning, often preventing the session
close message from being processed in some cases.

Switch to a waitqueue and defined a condition helper.  This cleans things
up nicely.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-22 15:04:43 -07:00
Yehuda Sadeh e56fa10e92 ceph: generalize mon requests, add pool op support
Generalize the current statfs synchronous requests, and support pool_ops.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-10 14:41:25 -07:00
Sage Weil 0eb6cd49f6 ceph: only queue async writeback on cap revocation if there is dirty data
Normally, if the Fb cap bit is being revoked, we queue an async writeback.
If there is no dirty data but we still hold the cap, this leaves the
client sitting around doing nothing until the cap timeouts expire and the
cap is released on its own (as it would have been without the revocation).

Instead, only queue writeback if the bit is actually used (i.e., we have
dirty data).  If not, we can reply to the revocation immediately.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-05 13:53:40 -07:00
Sage Weil e9d1774431 ceph: do not ignore osd_idle_ttl mount option
Actually apply the mount option to the mount_args struct.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-03 12:56:57 -07:00
Sage Weil 52dfb8ac0e ceph: constify dentry_operations
This makes checkpatch happy.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-03 10:25:30 -07:00
Sage Weil 213c99ee0c ceph: whitespace cleanup
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-03 10:25:11 -07:00
Greg Farnum 40819f6fb2 ceph: add flock/fcntl lock support
Implement flock inode operation to support advisory file locking.  All
lock/unlock operations are synchronous with the MDS.  Lock state is
sent when reconnecting to a recovering MDS to restore the shared lock
state.

Signed-off-by: Greg Farnum <gregf@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-02 16:10:53 -07:00
Greg Farnum fbaad9797a ceph: define on-wire types, constants for file locking support
Define the MDS operations and data types for doing file advisory locking
with the MDS.

Signed-off-by: Greg Farnum <gregf@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-02 15:48:54 -07:00
Greg Farnum c6f3fdc592 ceph: add CEPH_FEATURE_FLOCK to the supported feature bits
This informs the server that we will accept v2 client_caps format and v2
client_reconnect format messages.

Signed-off-by: Greg Farnum <gregf@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-02 15:48:51 -07:00
Sage Weil 20cb34ae9e ceph: support v2 reconnect encoding
Encode either old or v2 encoding of client_reconnect message, depending on
whether the peer has the FLOCK feature bit.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-02 15:48:50 -07:00
Sage Weil ce1fbc8dd6 ceph: support v2 client_caps encoding
Add support for v2 encoding of MClientCaps, which includes a flock blob.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-02 15:48:49 -07:00
Sage Weil cbbfe49905 ceph: move AES iv definition to shared header
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-02 15:48:31 -07:00
Sage Weil 73a7e693f9 ceph: fix decoding of pool snap info
The pool info contains a vector for snap_info_t, not snap ids.  This fixes
the broken decoding, which would declare teh update corrupt when a pool
snapshot was created.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-02 11:10:07 -07:00
Sage Weil 2d9c98ae97 ceph: make ->sync_fs not wait if wait==0
The ->sync_fs() super op only needs to wait if wait is true.  Otherwise,
just get some dirty cap writeback started.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:42 -07:00
Sage Weil b8cd07e78e ceph: warn on missing snap realm
Well, this Shouldn't Happen, so it would be helpful to know the caller when
it does.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:42 -07:00
Sage Weil effcb9ed43 ceph: print useful error message when crush rule not found
Include the crush_ruleset in the error message.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:42 -07:00
Sage Weil a8b763a9b3 ceph: use %pU to print uuid (fsid)
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:42 -07:00
Sage Weil f0b18d9f22 ceph: sync header defs with server code
Define ROLLBACK op, IFLOCK inode lock (for advisory file locking).

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:42 -07:00
Sage Weil 5cd068c200 ceph: clean up header guards
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:42 -07:00
Sage Weil 9688f19a18 ceph: strip misleading/obsolete version, feature info
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:41 -07:00
Sage Weil 6a2593823a ceph: specify supported features in super.h
Specify the supported/required feature bits in super.h client code instead
of using the definitions from the shared kernel/userspace headers (which
will go away shortly).

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:41 -07:00
Sage Weil c309f0ab26 ceph: clean up fsid mount option
Specify the fsid mount option in hex, not via the major/minor u64 hackery we had
before.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:41 -07:00
Sage Weil e0f9f9ee8f ceph: remove unused 'monport' mount option
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:41 -07:00
Greg Farnum e55b71f802 ceph: handle ESTALE properly; on receipt send to authority if it wasn't
Signed-off-by: Greg Farnum <gregf@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:41 -07:00
Greg Farnum 2bc50259fa ceph: add ceph_get_cap_for_mds function.
Signed-off-by: Greg Farnum <gregf@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:41 -07:00
Sage Weil 154f42c2c3 ceph: connect to export targets on cap export
When we get a cap EXPORT message, make sure we are connected to all export
targets to ensure we can handle the matching IMPORT.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:41 -07:00
Sage Weil cb170a2215 ceph: connect to export targets if mds is laggy
If an MDS we are talking to may have failed, we need to open sessions to
its potential export targets to ensure that any in-progress migration that
may have involved some of our caps is properly handled.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:40 -07:00
Sage Weil ed0552a1a2 ceph: introduce helper to connect to mds export targets
There are a few cases where we need to open sessions with a given mds's
potential export targets.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:40 -07:00
Sage Weil 796d6955a5 ceph: only set num_pages in calc_layout
Setting it elsewhere is unnecessary and more fragile.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:40 -07:00
Yehuda Sadeh 37151668ba ceph: do caps accounting per mds_client
Caps related accounting is now being done per mds client instead
of just being global. This prepares ground work for a later revision
of the caps preallocated reservation list.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:40 -07:00
Sage Weil 0deb01c999 ceph: track laggy state of mds from mdsmap
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:40 -07:00
Yehuda Sadeh cd84db6e40 ceph: code cleanup
Mainly fixing minor issues reported by sparse.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:40 -07:00
Sage Weil ca81f3f6bd ceph: skip if no auth cap in flush_snaps
If we have a capsnap but no auth cap (e.g. because it is migrating to
another mds), bail out and do nothing for now.  Do NOT remove the capsnap
from the flush list.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:39 -07:00
Sage Weil 3b454c4945 ceph: simplify caps revocation, fix for multimds
The caps revocation should either initiate writeback, invalidateion, or
call check_caps to ack or do the dirty work.  The primary question is
whether we can get away with only checking the auth cap or whether all
caps need to be checked.

The old code was doing...something else.  At the very least, revocations
from non-auth MDSs could break by triggering the "check auth cap only"
case.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:39 -07:00
Sage Weil 38e8883ee3 ceph: simplify add_cap_releases
No functional change, aside from more useful debug output.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:39 -07:00
Sage Weil ee6b272b9c ceph: drop unused argument
Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:39 -07:00
Sage Weil 2962507ca2 ceph: perform lazy reads when file mode and caps permit
If the file mode is marked as "lazy," perform cached/buffered reads when
the caps permit it.  Adjust the rdcache_gen and invalidation logic
accordingly so that we manage our cache based on the FILE_CACHE -or-
FILE_LAZYIO cap bits.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:39 -07:00
Sage Weil 33caad324b ceph: perform lazy writes when file mode and caps permit
If we have marked a file as "lazy" (using the ceph ioctl), perform buffered
writes when the MDS caps allow it.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:39 -07:00
Sage Weil 8c6e9229fc ceph: add LAZYIO ioctl to mark a file description for lazy consistency
Allow an application to mark a file descriptor for lazy file consistency
semantics, allowing buffered reads and writes when multiple clients are
accessing the same file.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:39 -07:00
Sage Weil 84d9509234 ceph: request FILE_LAZYIO cap when LAZY file mode is set
Also clean up the file flags -> file mode -> wanted caps functions while
we're at it.  This resyncs this file with userspace.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01 20:11:38 -07:00
Yehuda Sadeh 03066f2345 ceph: use complete_all and wake_up_all
This fixes an issue triggered by running concurrent syncs. One of the syncs
would go through while the other would just hang indefinitely. In any case, we
never actually want to wake a single waiter, so the *_all functions should
be used.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-07-27 13:11:17 -07:00
Robert P. J. Day 25848b3ec6 ceph: Correct obvious typo of Kconfig variable "CRYPTO_AES"
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Sage Weil <sage@newdream.net>
2010-07-24 21:36:07 -07:00
Sage Weil 1dadcce358 ceph: fix dentry lease release
When we embed a dentry lease release notification in a request, invalidate
our lease so we don't think we still have it.  Otherwise we can get all
sorts of incorrect client behavior when multiple clients are interacting
with the same part of the namespace.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-07-23 13:54:21 -07:00
Sage Weil 8c696737aa ceph: fix leak of dentry in ceph_init_dentry() error path
If we fail to allocate a ceph_dentry_info, don't leak the dn reference.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-07-23 10:02:07 -07:00
Sage Weil bc4fdca857 ceph: fix pg_mapping leak on pg_temp updates
Free the ceph_pg_mapping structs when they are removed from the pg_temp
rbtree.  Also fix a leak in the __insert_pg_mapping() error path.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-07-23 10:02:06 -07:00
Sage Weil 252af52146 ceph: fix d_release dop for snapdir, snapped dentries
We need to set the d_release dop for snapdir and snapped dentries so that
the ceph_dentry_info struct gets released.  We also use the dcache to
cache readdir results when possible, which only works if we know when
dentries are dropped from the cache.  Since we don't use the dcache for
readdir in the hidden snapdir, avoid that case in ceph_dentry_release.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-07-23 10:02:05 -07:00
Sage Weil a0dff78dab ceph: avoid dcache readdir for snapdir
We should always go to the MDS for readdir on the hidden snapdir.  The
set of snapshots can change at any time; the client can't trust its cache
for that.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-07-22 13:50:45 -07:00
Sage Weil e979cf5039 ceph: do not include cap/dentry releases in replayed messages
Strip the cap and dentry releases from replayed messages.  They can
cause the shared state to get out of sync because they were generated
(with the request message) earlier, and no longer reflect the current
client state.

Signed-off-by: Sage Weil <sage@newdream.net>
2010-07-16 10:30:18 -07:00