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* Merge branch 'for-linus' of ↵Linus Torvalds2011-01-13
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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
| * ceph: add dir_layout to inodeSage Weil2011-01-12
| | | | | | | | | | | | | | | | | | 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>
* | fs: provide rcu-walk aware permission i_opsNick Piggin2011-01-07
|/ | | | Signed-off-by: Nick Piggin <npiggin@kernel.dk>
* ceph: fix rdcache_gen usage and invalidateSage Weil2010-11-08
| | | | | | | | | | | | | | | | | | | | 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>
* ceph: do not carry i_lock for readdir from dcacheSage Weil2010-10-20
| | | | | | | | | | | | 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>
* ceph: factor out libceph from Ceph file systemYehuda Sadeh2010-10-20
| | | | | | | | | | | | | | | | | | | | | | 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>
* ceph: only send one flushsnap per cap_snap per mds sessionSage Weil2010-09-17
| | | | | | | | | | | 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>
* ceph: fix cap_snap and realm splitSage Weil2010-09-16
| | | | | | | | | | | | | | 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>
* ceph: maintain i_head_snapc when any caps are dirty, not just for dataSage Weil2010-08-24
| | | | | | | | | | | | 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>
* ceph: include dirty xattrs state in snapped capsSage Weil2010-08-22
| | | | | | | | | | | | 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>
* ceph: constify dentry_operationsSage Weil2010-08-03
| | | | | | This makes checkpatch happy. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: add flock/fcntl lock supportGreg Farnum2010-08-02
| | | | | | | | | | 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>
* ceph: add CEPH_FEATURE_FLOCK to the supported feature bitsGreg Farnum2010-08-02
| | | | | | | | 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>
* ceph: use %pU to print uuid (fsid)Sage Weil2010-08-01
| | | | Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: specify supported features in super.hSage Weil2010-08-01
| | | | | | | | 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>
* ceph: add ceph_get_cap_for_mds function.Greg Farnum2010-08-01
| | | | | Signed-off-by: Greg Farnum <gregf@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: do caps accounting per mds_clientYehuda Sadeh2010-08-01
| | | | | | | | | 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>
* Merge branch 'for-linus' of ↵Linus Torvalds2010-05-30
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: clean up on forwarded aborted mds request ceph: fix leak of osd authorizer ceph: close out mds, osd connections before stopping auth ceph: make lease code DN specific fs/ceph: Use ERR_CAST ceph: renew auth tickets before they expire ceph: do not resend mon requests on auth ticket renewal ceph: removed duplicated #includes ceph: avoid possible null dereference ceph: make mds requests killable, not interruptible sched: add wait_for_completion_killable_timeout
| * ceph: removed duplicated #includesAndrea Gelmini2010-05-29
| | | | | | | | | | | | | | | | | | fs/ceph/auth.c: linux/slab.h is included more than once. fs/ceph/super.h: linux/slab.h is included more than once. Acked-by: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net> Signed-off-by: Sage Weil <sage@newdream.net>
* | drop unused dentry argument to ->fsyncChristoph Hellwig2010-05-27
|/ | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* ceph: specify max_bytes on readdir repliesSage Weil2010-05-17
| | | | | | | Specify max bytes in request to bound size of reply. Add associated mount option with default value of 512 KB. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: clean up mount options, ->show_options()Sage Weil2010-05-17
| | | | | | Ensure all options are included in /proc/mounts. Some cleanup. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: use ceph_sb_to_client instead of ceph_clientCheng Renquan2010-05-17
| | | | | | | | | | | | | | | ceph_sb_to_client and ceph_client are really identical, we need to dump one; while function ceph_client is confusing with "struct ceph_client", ceph_sb_to_client's definition is more clear; so we'd better switch all call to ceph_sb_to_client. -static inline struct ceph_client *ceph_client(struct super_block *sb) -{ - return sb->s_fs_info; -} Signed-off-by: Cheng Renquan <crquan@gmail.com> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: invalidate affected dentry leases on aborted requestsSage Weil2010-05-17
| | | | | | | | | | | | | If we abort a request, we return to caller, but the request may still complete. And if we hold the dir FILE_EXCL bit, we may not release a lease when sending a request. A simple un-tar, control-c, un-tar again will reproduce the bug (manifested as a 'Cannot open: File exists'). Ensure we invalidate affected dentry leases (as well dir I_COMPLETE) so we don't have valid (but incorrect) leases. Do the same, consistently, at other sites where I_COMPLETE is similarly cleared. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: add missing #includesSage Weil2010-05-03
| | | | Signed-off-by: Sage Weil <sage@newdream.net>
* 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: 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>
* | 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: 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: 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 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: 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: 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: 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: 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: writeback congestion controlYehuda Sadeh2009-12-21
| | | | | | | | Set bdi congestion bit when amount of write data in flight exceeds adjustable threshold. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: include link to bdi in debugfsSage Weil2009-12-21
| | | | Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: fix debugfs entry, simplify fsid checksSage Weil2009-11-20
| | | | | | | | | | | We may first learn our fsid from any of the mon, osd, or mds maps (whichever the monitor sends first). Consolidate checks in a single helper. Initialize the client debugfs entry then, since we need the fsid (and global_id) for the directory name. Also remove dead mount code. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: negotiate authentication protocol; implement AUTH_NONE protocolSage Weil2009-11-18
| | | | | | | | | | | | | | | | When we open a monitor session, we send an initial AUTH message listing the auth protocols we support, our entity name, and (possibly) a previously assigned global_id. The monitor chooses a protocol and responds with an initial message. Initially implement AUTH_NONE, a dummy protocol that provides no security, but works within the new framework. It generates 'authorizers' that are used when connecting to (mds, osd) services that simply state our entity name and global_id. This is a wire protocol change. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: build cleanly without CONFIG_DEBUG_FSSage Weil2009-11-12
| | | | Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: remove recon_gen logicSage Weil2009-11-10
| | | | | | | | We don't get an explicit affirmative confirmation that our caps reconnect, nor do we necessarily want to pay that cost. So, take all this code out for now. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: do not confuse stale and dead (unreconnected) capsSage Weil2009-11-09
| | | | | | | | | | | | We were using the cap_gen to track both stale caps (caps that timed out due to temporarily losing touch with the mds) and dead caps that did not reconnect after an MDS failure. Introduce a recon_gen counter to track reconnections to restarted MDSs and kill dead caps based on that instead. Rename gen to cap_gen while we're at it to make it more clear which is which. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: replace list_entry with container_ofNoah Watkins2009-10-28
| | | | | | | | Usage of non-list.h list_entry function for container_of functionality replaced with direct use of container_of. Signed-off-by: Noah Watkins <noah@noahdesu.com> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: allocate and parse mount args before client instanceSage Weil2009-10-27
| | | | | | | | This simplifies much of the error handling during mount. It also means that we have the mount args before client creation, and we can initialize based on those options. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: remove small mon addr limit; use CEPH_MAX_MON where appropriateSage Weil2009-10-22
| | | | | | | | Get rid of separate max mon limit; use the system limit instead. This allows mounts when there are lots of mon addrs provided by mount.ceph (as with a host with lots of A/AAAA records). Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: enable readaheadSage Weil2009-10-16
| | | | | | Initialized bdi->ra_pages to enable readahead. Use 512KB default. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: flush dirty caps via the cap_dirty listSage Weil2009-10-15
| | | | | | | | | | | | | | | | | | Previously we were flushing dirty caps by passing an extra flag when traversing the delayed caps list. Besides being a bit ugly, that can also miss caps that are dirty but didn't result in a cap requeue: notably, mark_caps_dirty(). Separate the flushing into a separate helper, and traverse the cap_dirty list. This also brings i_dirty_item in line with i_dirty_caps: we are on the list IFF caps != 0. We carry an inode ref IFF dirty_caps|flushing_caps != 0. Lose the unused return value from __ceph_mark_caps_dirty(). Signed-off-by: Sage Weil <sage@newdream.net>
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