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2010-03-05ceph: update for write_inode API changeStephen Rothwell
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Sage Weil <sage@newdream.net>
2010-03-04ceph: reset osd after relevant messages timed outYehuda Sadeh
This simplifies the process of timing out messages. We keep lru of current messages that are in flight. If a timeout has passed, we reset the osd connection, so that messages will be retransmitted. This is a failsafe in case we hit some sort of problem sending out message to the OSD. Normally, we'll get notification via an updated osdmap if there are problems. If a request is older than the keepalive timeout, send a keepalive to ensure we detect any breaks in the TCP connection. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
2010-03-01ceph: fix flush_dirty_caps race with caps migrationSage Weil
The flush_dirty_caps() used to loop over the first entry of the cap_dirty dirty list on the assumption that after calling ceph_check_caps() it would be removed from the list. This isn't true for caps that are being migrated between MDSs, where we've received the EXPORT but not the IMPORT. Instead, do a safe list iteration, and pin the next inode on the list via the CEPH_I_NOFLUSH flag. Signed-off-by: Sage Weil <sage@newdream.net>
2010-03-01ceph: include migrating caps in issued setSage Weil
We should include caps that are mid-migration (we've received the EXPORT, but not the IMPORT) in the issued caps set. Signed-off-by: Sage Weil <sage@newdream.net>
2010-03-01ceph: fix osdmap decoding when pools include (removed) snapsSage Weil
Add missing pointer dereference (p is a void **). Signed-off-by: Sage Weil <sage@newdream.net>
2010-03-01ceph: return EBADF if waiting for caps on closed fileSage Weil
Verify the file is actually open for the given caps when we are waiting for caps. This ensures we will wake up and return EBADF if another thread closes the file out from under us. Note that EBADF is also the correct return code from write(2) when called on a file handle opened for reading (although the vfs should catch that). Signed-off-by: Sage Weil <sage@newdream.net>
2010-03-01ceph: set osd request message front length correctlySage Weil
We didn't set the front length correctly. When messages used the message pool we ended up with the conservative max (4 KB), and the rest of the time the slightly less conservative estimate. Even though the OSD ignores the extra data, set it to the right value to avoid sending extra data over the network. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
2010-03-01ceph: reset front len on return to msgpool; BUG on mismatched front iovSage Weil
Reset msg front len when a message is returned to the pool: the caller may have changed it. BUG if we try to send a message with a hdr.front_len that doesn't match the front iov. Signed-off-by: Sage Weil <sage@newdream.net>
2010-03-01ceph: fix snaptrace decoding on cap migration between mdsSage Weil
This was simply broken. Apparently at some point we thought about putting the snaptrace in the middle section, but didn't. Signed-off-by: Sage Weil <sage@newdream.net>
2010-03-01ceph: use single osd op reply msgSage Weil
Use a single ceph_msg for the osd reply, even when we are getting multiple replies. Signed-off-by: Sage Weil <sage@newdream.net>
2010-03-01ceph: reset bits on connection closeSage Weil
Clear LOSSYTX bit, so that if/when we reconnect, said reconnect will retry on failure. Clear _PENDING bits too, to avoid polluting subsequent connection state. Drop unused REGISTERED bit. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-26ceph: remove bogus mds forward warningSage Weil
The must_resend flag is always true, not false. In any case, we can just ignore it anyway. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-26ceph: remove fragile __map_osds optimizationSage Weil
We used to try to avoid freeing and then reallocating the osd struct. This is a bit fragile due to potential interactions with other references (beyond o_requests), and may be the cause of this crash: [120633.442358] BUG: unable to handle kernel NULL pointer dereference at (null) [120633.443292] IP: [<ffffffff812549b6>] rb_erase+0x11d/0x277 [120633.443292] PGD f7ff3067 PUD f7f53067 PMD 0 [120633.443292] Oops: 0000 [#1] PREEMPT SMP [120633.443292] last sysfs file: /sys/kernel/uevent_seqnum [120633.443292] CPU 1 [120633.443292] Modules linked in: ceph fan ac battery psmouse ehci_hcd ide_pci_generic ohci_hcd thermal processor button [120633.443292] Pid: 3023, comm: ceph-msgr/1 Not tainted 2.6.32-rc2 #12 H8SSL [120633.443292] RIP: 0010:[<ffffffff812549b6>] [<ffffffff812549b6>] rb_erase+0x11d/0x277 [120633.443292] RSP: 0018:ffff8800f7b13a50 EFLAGS: 00010246 [120633.443292] RAX: ffff880022907819 RBX: ffff880022907818 RCX: 0000000000000000 [120633.443292] RDX: ffff8800f7b13a80 RSI: ffff8800f587eb48 RDI: 0000000000000000 [120633.443292] RBP: ffff8800f7b13a60 R08: 0000000000000000 R09: 0000000000000004 [120633.443292] R10: 0000000000000000 R11: ffff8800c4441000 R12: ffff8800f587eb48 [120633.443292] R13: ffff8800f58eaa00 R14: ffff8800f413c000 R15: 0000000000000001 [120633.443292] FS: 00007fbef6e226e0(0000) GS:ffff880009200000(0000) knlGS:0000000000000000 [120633.443292] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b [120633.443292] CR2: 0000000000000000 CR3: 00000000f7c53000 CR4: 00000000000006e0 [120633.443292] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [120633.443292] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [120633.443292] Process ceph-msgr/1 (pid: 3023, threadinfo ffff8800f7b12000, task ffff8800f5858b40) [120633.443292] Stack: [120633.443292] ffff8800f413c000 ffff8800f587e9c0 ffff8800f7b13a80 ffffffffa0098a86 [120633.443292] <0> 00000000000006f1 0000000000000000 ffff8800f7b13af0 ffffffffa009959b [120633.443292] <0> ffff8800f413c000 ffff880022a68400 ffff880022a68400 ffff8800f587e9c0 [120633.443292] Call Trace: [120633.443292] [<ffffffffa0098a86>] __remove_osd+0x4d/0xbc [ceph] [120633.443292] [<ffffffffa009959b>] __map_osds+0x199/0x4fa [ceph] [120633.443292] [<ffffffffa00999f4>] ? __send_request+0xf8/0x186 [ceph] [120633.443292] [<ffffffffa0099beb>] kick_requests+0x169/0x3cb [ceph] [120633.443292] [<ffffffffa009a8c1>] ceph_osdc_handle_map+0x370/0x522 [ceph] Since we're probably screwed anyway if a small kmalloc is failing, don't bother with trying to be clever here. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-25ceph: fix connection fault STANDBY checkSage Weil
Move any out_sent messages to out_queue _before_ checking if out_queue is empty and going to STANDBY, or else we may drop something that was never acked. And clean up the code a bit (less goto). Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-25ceph: invalidate_authorizer without con->mutex heldSage Weil
This fixes lock ABBA inversion, as the ->invalidate_authorizer() op may need to take a lock (or even call back into the messenger). Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-23ceph: don't clobber write return value when using O_SYNCYehuda Sadeh
Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-23ceph: fix client_request_forward decodingSage Weil
The tid is in the message header, not body. Broken since 6df058c0. No need to look at next mds session; just mark the request and be done. (The old error path was broken too, but now it's gone.) Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-23ceph: drop messages on unregistered mds sessions; cleanupSage Weil
Verify the mds session is currently registered before handling incoming messages. Clean up message handlers to pull mds out of session->s_mds instead of less trustworthy src field. Clean up con_{get,put} debug output. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-23ceph: fix comments, locking in destroy_inodeSage Weil
The destroy_inode path needs no inode locks since there are no inode references. Update __ceph_remove_cap comment to reflect that it is called without cap->session->s_mutex in this case. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-23ceph: move dereference after NULL testAlexander Beregalov
Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com> Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-23ceph: fix up unexpected message handlingSage Weil
Fix skipping of unexpected message types from osd, mon. Clean up pr_info and debug output. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-19ceph: cleanup redundant code in handle_cap_grantYehuda Sadeh
There is no state in local vars that requires us to loop after temporarily dropping i_lock. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-19ceph: don't truncate dirty pages in invalidate work threadYehuda Sadeh
Instead of truncating the whole range of pages, we skip those pages that are dirty or in the middle of writeback. Those pages will be cleared later when the writeback completes. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-19ceph: remove page upon writeback completion if lost cache capYehuda Sadeh
This page should have been removed earlier when the cache cap was revoked, but a writeback was in flight, so it was skipped. We truncate it here just as the writeback finishes, while it's still locked. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-19ceph: fix check for invalidate_mapping_pages successSage Weil
We need to know whether there was any page left behind, and not the return value (the total number of pages invalidated). Look at the mapping to see if we were successful or not. Move it all into a helper to simplify the two callers. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-17ceph: fix typo in ceph_queue_writeback debug outputSage Weil
Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-17ceph: v0.19 releaseSage Weil
Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-17ceph: use rbtree for pg pools; decode new osdmap formatSage Weil
Since we can now create and destroy pg pools, the pool ids will be sparse, and an array no longer makes sense for looking up by pool id. Use an rbtree instead. The OSDMap encoding also no longer has a max pool count (previously used to allocate the array). There is a new pool_max, that is the largest pool id we've ever used, although we don't actually need it in the client. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-17ceph: fix memory leak when destroying osdmap with pg_temp mappingsSage Weil
Also move _lookup_pg_mapping into a helper. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-17ceph: fix iterate_caps removal raceSage Weil
We need to be able to iterate over all caps on a session with a possibly slow callback on each cap. To allow this, we used to prevent cap reordering while we were iterating. However, we were not safe from races with removal: removing the 'next' cap would make the next pointer from list_for_each_entry_safe be invalid, and cause a lock up or similar badness. Instead, we keep an iterator pointer in the session pointing to the current cap. As before, we avoid reordering. For removal, if the cap isn't the current cap we are iterating over, we are fine. If it is, we clear cap->ci (to mark the cap as pending removal) but leave it in the session list. In iterate_caps, we can safely finish removal and get the next cap pointer. While we're at it, clean up put_cap to not take a cap reservation context, as it was never used. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-17ceph: clean up readdir caps reservationSage Weil
Use a global counter for the minimum number of allocated caps instead of hard coding a check against readdir_max. This takes into account multiple client instances, and avoids examining the superblock mount options when a cap is dropped. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-16ceph: fix authentication races, auth_none oopsSage Weil
Call __validate_auth() under monc->mutex, and use helper for initial hello so that the pending_auth flag is set. This fixes possible races in which we have an authentication request (hello or otherwise) pending and send another one. In particular, with auth_none, we _never_ want to call ceph_build_auth() from __validate_auth(), since the ->build_request() method is NULL. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-16ceph: use rbtree for mon statfs requestsSage Weil
An rbtree is lighter weight, particularly given we will generally have very few in-flight statfs requests. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-16ceph: use rbtree for snap_realmsSage Weil
Switch from radix tree to rbtree for snap realms. This is much more appropriate given that realm keys are few and far between. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-16ceph: use rbtree for mds requestsSage Weil
The rbtree is a more appropriate data structure than a radix_tree. It avoids extra memory usage and simplifies the code. It also fixes a bug where the debugfs 'mdsc' file wasn't including the most recent mds request. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-16ceph: cancel delayed work when closing connectionSage Weil
This ensures that if/when we reopen the connection, we can requeue work on the connection immediately, without waiting for an old timer to expire. Queue new delayed work inside con->mutex to avoid any race. This fixes problems with clients failing to reconnect to the MDS due to the client_reconnect message arriving too late (due to waiting for an old delayed work timeout to expire). Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-16ceph: allow connection to be reopened by fault callbackSage Weil
Fix the messenger to allow a ceph_con_open() during the fault callback. Previously the work wasn't getting queued on the connection because the fault path avoids requeued work (normally spurious). Loop on reopening by checking for the OPENING state bit. This fixes OSD reconnects when a TCP connection drops. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-15ceph: reset osd connections after faultSage Weil
A single osd connection fault (e.g. tcp disconnect) wasn't reopening the connection, which causes all current and future requests for that osd to hang. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-13ceph: fix msgr to keep sent messages until ackedSage Weil
The test was backwards from commit b3d1dbbd: keep the message if the connection _isn't_ lossy. This allows the client to continue when the TCP connection drops for some reason (network glitch) but both ends survive. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-11ceph: remove bogus invalidate_mapping_pagesSage Weil
We were invalidating mapping pages when dropping FILE_CACHE in __send_cap(). But ceph_check_caps attempts to invalidate already, and also checks for success, so we should never get to this point. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-11ceph: invalidate pages even if truncate is pendingSage Weil
There is no reason not to invalidate pages when a truncate is pending. Both throw out page cache pages. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-11ceph: cleanup async writeback, truncation, invalidate helpersSage Weil
Grab inode ref in helper. Make work functions static, with consistent naming. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-11ceph: fix sync read eof check deadlockSage Weil
If a sync read gets a short result from the OSD, it may need to do a getattr to see if it is short due to reaching end-of-file. The getattr was being done while holding a reference to FILE_RD, which can lead to a deadlock if the MDS is revoking that capability bit and can't process the getattr until it does. We fix this by setting a flag if EOF size validation is needed, and doing the getattr in ceph_aio_read, after the RD cap ref is dropped. If the read needs to be continued, we loop and continue traversing the file. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-11ceph: do not retain caps that are being revokedSage Weil
Never retain caps in __send_cap() that are being revoked. Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-11ceph: cap revocation fixesSage Weil
Try to invalidate pages in ceph_check_caps() if FILE_CACHE is being revoked. If we fail, queue an immediate async invalidate if FILE_CACHE is being revoked. (If it's not being revoked, we just queue the caps for later evaluation later, as per the old behavior.) Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-11ceph: sync read/write considers page cacheYehuda Sadeh
In the cases where we either do a sync read or a write, we need to make sure that everything in the page cache is flushed. In the case of a sync write we invalidate the relevant pages, so that subsequent read/write reflects the new data written. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-11ceph: fix truncation when not holding capsYehuda Sadeh
A truncation should occur when either we have the specified caps for the file, or (in cases where we are not the only ones referencing the file) when it is mapped or when it is opened. The latter two cases were not handled. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-11ceph: refactor ceph_write_begin, fix ceph_page_mkwriteYehuda Sadeh
Originally ceph_page_mkwrite called ceph_write_begin, hoping that the returned locked page would be the page that it was requested to mkwrite. Factored out relevant part of ceph_page_mkwrite and we lock the right page anyway. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-11ceph: fix short synchronous readsYehuda Sadeh
Zeroing of holes was not done correctly: page_off was miscalculated and zeroing the tail didn't not adjust the 'read' value to include the zeroed portion. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
2010-02-11ceph: add uid field to ceph_pg_poolSage Weil
Also verify encoding version as we go. Signed-off-by: Sage Weil <sage@newdream.net>
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