aboutsummaryrefslogtreecommitdiffstats
path: root/fs/ceph
Commit message (Collapse)AuthorAge
* Merge branch 'for-linus' of ↵Linus Torvalds2010-04-14
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: use separate class for ceph sockets' sk_lock ceph: reserve one more caps space when doing readdir ceph: queue_cap_snap should always queue dirty context ceph: fix dentry reference leak in dcache readdir ceph: decode v5 of osdmap (pool names) [protocol change] ceph: fix ack counter reset on connection reset ceph: fix leaked inode ref due to snap metadata writeback race ceph: fix snap context reference leaks ceph: allow writeback of snapped pages older than 'oldest' snapc ceph: fix dentry rehashing on virtual .snap dir
| * ceph: use separate class for ceph sockets' sk_lockSage Weil2010-04-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use a separate class for ceph sockets to prevent lockdep confusion. Because ceph sockets only get passed kernel pointers, there is no dependency from sk_lock -> mmap_sem. If we share the same class as other sockets, lockdep detects a circular dependency from mmap_sem (page fault) -> fs mutex -> sk_lock -> mmap_sem because dependencies are noted from both ceph and user contexts. Using a separate class prevents the sk_lock(ceph) -> mmap_sem dependency and makes lockdep happy. Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: reserve one more caps space when doing readdirYehuda Sadeh2010-04-13
| | | | | | | | | | | | | | | | We were missing space for the directory cap. The result was a BUG at fs/ceph/caps.c:2178. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: queue_cap_snap should always queue dirty contextSage Weil2010-04-13
| | | | | | | | | | | | | | | | | | This simplifies the calling convention, and fixes a bug where we queue a capsnap with a context other than i_head_snapc (the one that matches the dirty pages). The result was a BUG at fs/ceph/caps.c:2178 on writeback completion when a capsnap matching the writeback snapc could not be found. Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: fix dentry reference leak in dcache readdirSage Weil2010-04-12
| | | | | | | | | | | | | | When filldir returned an error (e.g. buffer full for a large directory), we would leak a dentry reference, causing an oops on umount. Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: decode v5 of osdmap (pool names) [protocol change]Sage Weil2010-04-09
| | | | | | | | | | | | | | | | Teach the client to decode an updated format for the osdmap. The new format includes pool names, which will be useful shortly. Get this change in earlier rather than later. Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: fix ack counter reset on connection resetSage Weil2010-04-02
| | | | | | | | | | | | | | | | | | If in_seq_acked isn't reset along with in_seq, we don't ack received messages until we reach the old count, consuming gobs memory on the other end of the connection and introducing a large delay when those messages are eventually deleted. Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: fix leaked inode ref due to snap metadata writeback raceSage Weil2010-04-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We create a ceph_cap_snap if there is dirty cap metadata (for writeback to mds) OR dirty pages (for writeback to osd). It is thus possible that the metadata has been written back to the MDS but the OSD data has not when the cap_snap is created. This results in a cap_snap with dirty(caps) == 0. The problem is that cap writeback to the MDS isn't necessary, and a FLUSHSNAP cap op gets no ack from the MDS. This leaves the cap_snap attached to the inode along with its inode reference. Fix the problem by dropping the cap_snap if it becomes 'complete' (all pages written out) and dirty(caps) == 0 in ceph_put_wrbuffer_cap_refs(). Also, BUG() in __ceph_flush_snaps() if we encounter a cap_snap with dirty(caps) == 0. Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: fix snap context reference leaksSage Weil2010-04-01
| | | | | | | | | | | | | | | | | | The get_oldest_context() helper takes a reference to the returned snap context, but most callers weren't dropping that reference. Fix them. Also drop the unused locked __get_oldest_context() variant. Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: allow writeback of snapped pages older than 'oldest' snapcSage Weil2010-04-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On snap deletion, we don't regenerate ceph_cap_snaps for inodes with dirty pages because deletion does not affect metadata writeback. However, we did run into problems when we went to write back the pages because the 'oldest' snapc is determined by the oldest cap_snap, and that may be the newer snapc that reflects the deletion. This caused confusion and an infinite loop in ceph_update_writeable_page(). Change the snapc checks to allow writeback of any snapc that is equal to OR older than the 'oldest' snapc. When there are no cap_snaps, we were also using the realm's latest snapc for writeback, which complicates ceph_put_wrbufffer_cap_refs(). Instead, use i_head_snapc, the most snapc used for the most recent ('head') data. This makes the writeback snapc (ceph_osd_request.r_snapc) _always_ match a capsnap or i_head_snapc. Also, in writepags_finish(), drop the snapc referenced by the _page_ and do not assume it matches the request snapc (it may not anymore). Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: fix dentry rehashing on virtual .snap dirSage Weil2010-03-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If a lookup fails on the magic .snap directory, we bind it to a magic snap directory inode in ceph_lookup_finish(). That code assumes the dentry is unhashed, but a recent server-side change started returning NULL leases on lookup failure, causing the .snap dentry to be hashed and NULL by ceph_fill_trace(). This causes dentry hash chain corruption, or a dies when d_rehash() includes BUG_ON(!d_unhashed(entry)); So, avoid processing the NULL dentry lease if it the dentry matches the snapdir name in ceph_fill_trace(). That allows the lookup completion to properly bind it to the snapdir inode. BUG there if dentry is hashed to be sure. Signed-off-by: Sage Weil <sage@newdream.net>
* | include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-30
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* ceph: fix use after free on mds __unregister_requestSage Weil2010-03-29
| | | | | | | | There was a use after free in __unregister_request that would trigger whenever the request map held the last reference. This appears to have triggered an oops during 'umount -f' when requests are being torn down. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: fix possible double-free of mds request referenceSage Weil2010-03-23
| | | | | | | | | Clear pointer to mds request after dropping the reference to ensure we don't drop it again, as there is at least one error path through this function that does not reset fi->last_readdir to a new value. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: fix session check on mds replySage Weil2010-03-23
| | | | | | | | | Fix a broken check that a reply came back from the same MDS we sent the request to. I don't think a case that actually triggers this would ever come up in practice, but it's clearly wrong and easy to fix. Reported-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: handle kmalloc() failureDan Carpenter2010-03-23
| | | | | | | | Return ERR_PTR(-ENOMEM) if kmalloc() fails. We handle allocation failures the same way later in the function. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: propagate mds session allocation failures to callerSage Weil2010-03-23
| | | | | | Return error to original caller if register_session() fails. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: make write_begin wait propagate ERESTARTSYSSage Weil2010-03-23
| | | | | | | | Currently, if the wait_event_interruptible is interrupted, we return EAGAIN unconditionally and loop, such that we aren't, in fact, interruptible. So, propagate ERESTARTSYS if we get it. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: fix snap rebuild conditionSage Weil2010-03-23
| | | | | | | | | | | | | | | We were rebuilding the snap context when it was not necessary (i.e. when the realm seq hadn't changed _and_ the parent seq was still older), which caused page snapc pointers to not match the realm's snapc pointer (even though the snap context itself was identical). This confused begin_write and put it into an endless loop. The correct logic is: rebuild snapc if _my_ realm seq changed, or if my parent realm's seq is newer than mine (and thus mine needs to be rebuilt too). Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: avoid reopening osd connections when address hasn't changedSage Weil2010-03-23
| | | | | | | | | | | | | | | | | | | | | | | | We get a fault callback on _every_ tcp connection fault. Normally, we want to reopen the connection when that happens. If the address we have is bad, however, and connection attempts always result in a connection refused or similar error, explicitly closing and reopening the msgr connection just prevents the messenger's backoff logic from kicking in. The result can be a console full of [ 3974.417106] ceph: osd11 10.3.14.138:6800 connection failed [ 3974.423295] ceph: osd11 10.3.14.138:6800 connection failed [ 3974.429709] ceph: osd11 10.3.14.138:6800 connection failed Instead, if we get a fault, and have outstanding requests, but the osd address hasn't changed and the connection never successfully connected in the first place, do nothing to the osd connection. The messenger layer will back off and retry periodically, because we never connected and thus the lossy bit is not set. Instead, touch each request's r_stamp so that handle_timeout can tell the request is still alive and kicking. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: rename r_sent_stamp r_stampSage Weil2010-03-23
| | | | | | | | Make variable name slightly more generic, since it will (soon) reflect either the time the request was sent OR the time it was last determined to be still retrying. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: fix connection fault con_work reentrancy problemSage Weil2010-03-23
| | | | | | | | | | | | The messenger fault was clearing the BUSY bit, for reasons unclear. This made it possible for the con->ops->fault function to reopen the connection, and requeue work in the workqueue--even though the current thread was already in con_work. This avoids a problem where the client busy loops with connection failures on an unreachable OSD, but doesn't address the root cause of that problem. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: prevent dup stale messages to console for restarting mdsSage Weil2010-03-23
| | | | | | | | Prevent duplicate 'mds0 caps stale' message from spamming the console every few seconds while the MDS restarts. Set s_renew_requested earlier, so that we only print the message once, even if we don't send an actual request. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: fix pg pool decoding from incremental osdmap updateSage Weil2010-03-23
| | | | | | | | | | The incremental map decoding of pg pool updates wasn't skipping the snaps and removed_snaps vectors. This caused osd requests to stall when pool snapshots were created or fs snapshots were deleted. Use a common helper for full and incremental map decoders that decodes pools properly. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: fix mds sync() race with completing requestsSage Weil2010-03-23
| | | | | | | | | | | | | | | | | | | | The wait_unsafe_requests() helper dropped the mdsc mutex to wait for each request to complete, and then examined r_node to get the next request after retaking the lock. But the request completion removes the request from the tree, so r_node was always undefined at this point. Since it's a small race, it usually led to a valid request, but not always. The result was an occasional crash in rb_next() while dereferencing node->rb_left. Fix this by clearing the rb_node when removing the request from the request tree, and not walking off into the weeds when we are done waiting for a request. Since the request we waited on will _always_ be out of the request tree, take a ref on the next request, in the hopes that it won't be. But if it is, it's ok: we can start over from the beginning (and traverse over older read requests again). Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: only release unused caps with mds requestsSage Weil2010-03-23
| | | | | | | | | | | | | | We were releasing used caps (e.g. FILE_CACHE) from encode_inode_release with MDS requests (e.g. setattr). We don't carry refs on most caps, so this code worked most of the time, but for setattr (utimes) we try to drop Fscr. This causes cap state to get slightly out of sync with reality, and may result in subsequent mds revoke messages getting ignored. Fix by only releasing unused caps. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: clean up handle_cap_grant, handle_caps wrt session mutexSage Weil2010-03-23
| | | | | | | | | | | Drop session mutex unconditionally in handle_cap_grant, and do the check_caps from the handle_cap_grant helper. This avoids using a magic return value. Also avoid using a flag variable in the IMPORT case and call check_caps at the appropriate point. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: fix session locking in handle_caps, ceph_check_capsSage Weil2010-03-23
| | | | | | | | | | | | | | | | | Passing a session pointer to ceph_check_caps() used to mean it would leave the session mutex locked. That wasn't always possible if it wasn't passed CHECK_CAPS_AUTHONLY. If could unlock the passed session and lock a differet session mutex, which was clearly wrong, and also emitted a warning when it a racing CPU retook it and we did an unlock from the wrong context. This was only a problem when there was more than one MDS. First, make ceph_check_caps unconditionally drop the session mutex, so that it is free to lock other sessions as needed. Then adjust the one caller that passes in a session (handle_cap_grant) accordingly. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: drop unnecessary WARN_ON in caps migrationSage Weil2010-03-23
| | | | | | | If we don't have the exported cap it's because we already released it. No need to WARN. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: fix null pointer deref of r_osd in debug outputSage Weil2010-03-23
| | | | | | | | This causes an oops when debug output is enabled and we kick an osd request with no current r_osd (sometime after an osd failure). Check the pointer before dereferencing. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: clean up service ticket decodingSage Weil2010-03-23
| | | | | | | | | | | | Previously we would decode state directly into our current ticket_handler. This is problematic if for some reason we fail to decode, because we end up with half new state and half old state. We are probably already in bad shape if we get an update we can't decode, but we may as well be tidy anyway. Decode into new_* temporaries and update the ticket_handler only on success. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: release old ticket_blob bufferSage Weil2010-03-21
| | | | | | | Release the old ticket_blob buffer when we get an updated service ticket from the monitor. Previously these were getting leaked. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: fix authenticator buffer size calculationSage Weil2010-03-21
| | | | | | | | The buffer size was incorrectly calculated for the ceph_x_encrypt() encapsulated ticket blob. Use a helper (with correct arithmetic) and BUG out if we were wrong. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: fix authenticator timeoutSage Weil2010-03-21
| | | | | | | | | | | | | | | | | We were failing to reconnect to services due to an old authenticator, even though we had the new ticket, because we weren't properly retrying the connect handshake, because we were calling an old/incorrect helper that left in_base_pos incorrect. The result was a failure to reconnect to the OSD or MDS (with an authentication error) if the MDS restarted after the service had been up a few hours (long enough for the original authenticator to be invalid). This was only a problem if the AUTH_X authentication was enabled. Now that the 'negotiate' and 'connect' stages are fully separated, we should use the prepare_read_connect() helper instead, and remove the obsolete one. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: fix inode removal from snap realm when racing with migrationSage Weil2010-03-21
| | | | | | | | | | | When an inode was dropped while being migrated between two MDSs, i_cap_exporting_issued was non-zero such that issue caps were non-zero and __ceph_is_any_caps(ci) was true. This prevented the inode from being removed from the snap realm, even as it was dropped from the cache. Fix this by dropping any residual i_snap_realm ref in destroy_inode. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: add missing locking to protect i_snap_realm_item during splitSage Weil2010-03-21
| | | | | | | | All ci->i_snap_realm_item/realm->inodes_with_caps manipulation should be protected by realm->inodes_with_caps_lock. This bug would have only bit us in a rare race with a realm split (during some snap creations). Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: implemented caps should always be superset of issued capsSage Weil2010-03-21
| | | | | | | | Added assertion, and cleared one case where the implemented caps were not following the issued caps. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: update for write_inode API changeStephen Rothwell2010-03-05
| | | | | Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: reset osd after relevant messages timed outYehuda Sadeh2010-03-04
| | | | | | | | | | | | | | | | 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>
* ceph: fix flush_dirty_caps race with caps migrationSage Weil2010-03-01
| | | | | | | | | | | | 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>
* ceph: include migrating caps in issued setSage Weil2010-03-01
| | | | | | | 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>
* ceph: fix osdmap decoding when pools include (removed) snapsSage Weil2010-03-01
| | | | | | Add missing pointer dereference (p is a void **). Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: return EBADF if waiting for caps on closed fileSage Weil2010-03-01
| | | | | | | | | | | | 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>
* ceph: set osd request message front length correctlySage Weil2010-03-01
| | | | | | | | | | | 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>
* ceph: reset front len on return to msgpool; BUG on mismatched front iovSage Weil2010-03-01
| | | | | | | | | | 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>
* ceph: fix snaptrace decoding on cap migration between mdsSage Weil2010-03-01
| | | | | | | 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>
* ceph: use single osd op reply msgSage Weil2010-03-01
| | | | | | | Use a single ceph_msg for the osd reply, even when we are getting multiple replies. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: reset bits on connection closeSage Weil2010-03-01
| | | | | | | | | | | | 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>
* ceph: remove bogus mds forward warningSage Weil2010-02-26
| | | | | | | 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>
* ceph: remove fragile __map_osds optimizationSage Weil2010-02-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-27 21:41:32 -0500