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* ceph: invalidate_authorizer without con->mutex heldSage Weil2010-02-25
| | | | | | | | 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>
* ceph: don't clobber write return value when using O_SYNCYehuda Sadeh2010-02-23
| | | | | Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: fix client_request_forward decodingSage Weil2010-02-23
| | | | | | | | | 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>
* ceph: drop messages on unregistered mds sessions; cleanupSage Weil2010-02-23
| | | | | | | | | | 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>
* ceph: fix comments, locking in destroy_inodeSage Weil2010-02-23
| | | | | | | | 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>
* ceph: move dereference after NULL testAlexander Beregalov2010-02-23
| | | | | Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: fix up unexpected message handlingSage Weil2010-02-23
| | | | | | | | Fix skipping of unexpected message types from osd, mon. Clean up pr_info and debug output. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: cleanup redundant code in handle_cap_grantYehuda Sadeh2010-02-19
| | | | | | | | 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>
* ceph: don't truncate dirty pages in invalidate work threadYehuda Sadeh2010-02-19
| | | | | | | | | 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>
* ceph: remove page upon writeback completion if lost cache capYehuda Sadeh2010-02-19
| | | | | | | | | 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>
* ceph: fix check for invalidate_mapping_pages successSage Weil2010-02-19
| | | | | | | | | | | 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>
* ceph: fix typo in ceph_queue_writeback debug outputSage Weil2010-02-17
| | | | Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: v0.19 releaseSage Weil2010-02-17
| | | | Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: use rbtree for pg pools; decode new osdmap formatSage Weil2010-02-17
| | | | | | | | | | | | 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>
* ceph: fix memory leak when destroying osdmap with pg_temp mappingsSage Weil2010-02-17
| | | | | | Also move _lookup_pg_mapping into a helper. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: fix iterate_caps removal raceSage Weil2010-02-17
| | | | | | | | | | | | | | | | | | | | | 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>
* ceph: clean up readdir caps reservationSage Weil2010-02-17
| | | | | | | | | 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>
* ceph: fix authentication races, auth_none oopsSage Weil2010-02-17
| | | | | | | | | | | 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>
* ceph: use rbtree for mon statfs requestsSage Weil2010-02-17
| | | | | | | 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>
* ceph: use rbtree for snap_realmsSage Weil2010-02-17
| | | | | | | 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>
* ceph: use rbtree for mds requestsSage Weil2010-02-17
| | | | | | | | | | 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>
* ceph: cancel delayed work when closing connectionSage Weil2010-02-17
| | | | | | | | | | | | 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>
* ceph: allow connection to be reopened by fault callbackSage Weil2010-02-17
| | | | | | | | | | | 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>
* ceph: reset osd connections after faultSage Weil2010-02-15
| | | | | | | | 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>
* ceph: fix msgr to keep sent messages until ackedSage Weil2010-02-13
| | | | | | | | | 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>
* ceph: remove bogus invalidate_mapping_pagesSage Weil2010-02-11
| | | | | | | | 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>
* ceph: invalidate pages even if truncate is pendingSage Weil2010-02-11
| | | | | | | 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>
* ceph: cleanup async writeback, truncation, invalidate helpersSage Weil2010-02-11
| | | | | | | Grab inode ref in helper. Make work functions static, with consistent naming. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: fix sync read eof check deadlockSage Weil2010-02-11
| | | | | | | | | | | | | | 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>
* ceph: do not retain caps that are being revokedSage Weil2010-02-11
| | | | | | Never retain caps in __send_cap() that are being revoked. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: cap revocation fixesSage Weil2010-02-11
| | | | | | | | | 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>
* ceph: sync read/write considers page cacheYehuda Sadeh2010-02-11
| | | | | | | | | | 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>
* ceph: fix truncation when not holding capsYehuda Sadeh2010-02-11
| | | | | | | | | | | 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>
* ceph: refactor ceph_write_begin, fix ceph_page_mkwriteYehuda Sadeh2010-02-11
| | | | | | | | | | 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>
* ceph: fix short synchronous readsYehuda Sadeh2010-02-11
| | | | | | | | | 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>
* ceph: add uid field to ceph_pg_poolSage Weil2010-02-11
| | | | | | Also verify encoding version as we go. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: put unused osd connections on lruYehuda Sadeh2010-02-11
| | | | | | | | | | Instead of removing osd connection immediately when the requests list is empty, put the osd connection on an lru. Only if that osd has not been used for more than a specified time, will it be removed. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: remove unused variableYehuda Sadeh2010-02-11
| | | | | Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: add support for auth_x authentication protocolSage Weil2010-02-11
| | | | | | | | | | | | | | | The auth_x protocol implements support for a kerberos-like mutual authentication infrastructure used by Ceph. We do not simply use vanilla kerberos because of scalability and performance issues when dealing with a large cluster of nodes providing a single logical service. Auth_x provides mutual authentication of client and server and protects against replay and man in the middle attacks. It does not encrypt the full session over the wire, however, so data payload may still be snooped. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: add struct version to auth encodingSage Weil2010-02-10
| | | | | | | Inlucde struct version in encoding. This will streamline future protocol changes. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: allow renewal of auth credentialsSage Weil2010-02-10
| | | | | | | | | Add infrastructure to allow the mon_client to periodically renew its auth credentials. Also add a messenger callback that will force such a renewal if a peer rejects our authenticator. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: aes crypto and base64 encode/decode helpersSage Weil2010-02-10
| | | | | | | Helpers to encrypt/decrypt AES and base64. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: buffer decoding helpersSage Weil2010-02-10
| | | | | | | | Helper for decoding into a ceph_buffer, and other misc decoding helpers we will need. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: release all pages after successful osd write responseSage Weil2010-02-02
| | | | | | | | | | We release all the pages, even if the osd response was different than the number of pages written. This could only happen due to truncation that arrives the osd in different order, for which we want the pages released anyway. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: always send truncation info with read and write osd opsYehuda Sadeh2010-02-02
| | | | | | | | This fixes a bug where the read/write ops arrive the osd after a following truncation request. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: remove unreachable codeYehuda Sadeh2010-01-29
| | | | | | | We never truncate to a smaller size without contacting the MDS. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: include type in ceph_entity_addr, filepathSage Weil2010-01-29
| | | | | | | Include a type/version in ceph_entity_addr and filepath. Include extra byte in filepath encoding as necessary. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: precede encoded ceph_pg_pool struct with versionSage Weil2010-01-25
| | | | Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: keep reserved replies on the request structureYehuda Sadeh2010-01-25
| | | | | | | | This includes treating all the data preallocation and revokation at the same place, not having to have a special case for the reserved pages. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
* ceph: alloc message data pages and check if tid existsYehuda Sadeh2010-01-25
| | | | | | | | | | | Now doing it in the same callback that is also responsible for allocating the 'front' part of the message. If we get a message that we haven't got a corresponding tid for, mark it for skipping. Moving the mutex unlock/lock from the osd alloc_msg callback to the calling function in the messenger. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
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