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| * ceph: cleanup ceph_flush_snaps()Yan, Zheng2016-07-283-88/+105
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch devide __ceph_flush_snaps() into two stags. In the first stage, __ceph_flush_snaps() assign snapcaps flush TIDs and add them to cap flush lists. __ceph_flush_snaps() keeps holding the i_ceph_lock in this stagge. So inode's auth cap can not change. In the second stage, __ceph_flush_snaps() send flushsnap cap messages. i_ceph_lock is unlocked before sending each cap message. If auth cap changes in the middle, __ceph_flush_snaps() just stops. This is OK because kick_flushing_inode_caps() will re-send flushsnap cap messages to inode's new auth MDS. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: kick cap flushes before sending other cap messageYan, Zheng2016-07-281-9/+34
| | | | | | | | | | | | | | If ceph_check_caps() wants to send cap message to a recovering MDS, make sure it kicks cap flushes first. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: introduce an inode flag to indicates if snapflush is neededYan, Zheng2016-07-283-15/+36
| | | | | | | | Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: avoid sending duplicated cap flush messageYan, Zheng2016-07-282-1/+18
| | | | | | | | | | | | | | make ceph_kick_flushing_caps() ignore inodes whose cap flushes have already been re-sent by ceph_early_kick_flushing_caps() Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: unify cap flush and snapcap flushYan, Zheng2016-07-285-222/+175
| | | | | | | | | | | | | | | | | | | | | | | | This patch includes following changes - Assign flush tid to snapcap flush - Remove session's s_cap_snaps_flushing list. Add inode to session's s_cap_flushing list instead. Inode is removed from the list when there is no pending snapcap flush or cap flush. - make __kick_flushing_caps() re-send both snapcap flushes and cap flushes. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: use list instead of rbtree to track cap flushesYan, Zheng2016-07-285-118/+56
| | | | | | | | | | | | | | | | We don't have requirement of searching cap flush by TID. In most cases, we just need to know TID of the oldest cap flush. List is ideal for this usage. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: update types of some local variblesYan, Zheng2016-07-281-11/+12
| | | | | | | | Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: include 'follows' of pending snapflush in cap reconnect messageYan, Zheng2016-07-281-1/+16
| | | | | | | | | | | | | | This helps the recovering MDS to reconstruct the internal states that tracking pending snapflush. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: update cap reconnect message to version 3Yan, Zheng2016-07-281-21/+47
| | | | | | | | Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: mount non-default filesystem by nameYan, Zheng2016-07-284-17/+117
| | | | | | | | | | | | | | | | | | | | | | To mount non-default filesytem, user currently needs to provide mds namespace ID. This is inconvenience. This patch makes user be able to mount filesystem by name. If user wants to mount non-default filesystem. Client first subscribes to fsmap.user. Subscribe to mdsmap.<ID> after getting ID of filesystem. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: handle LOOKUP_RCU in ceph_d_revalidateJeff Layton2016-07-281-6/+14
| | | | | | | | | | | | | | | | | | We can now handle the snapshot cases under RCU, as well as the non-snapshot case when we don't need to queue up a lease renewal allow LOOKUP_RCU walks to proceed under those conditions. Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Yan, Zheng <zyan@redhat.com>
| * ceph: allow dentry_lease_is_valid to work under RCU walkJeff Layton2016-07-281-15/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Under rcuwalk, we need to take extra care when dereferencing d_parent. We want to do that once and pass a pointer to dentry_lease_is_valid. Also, we must ensure that that function can handle the case where we're racing with d_release. Check whether "di" is NULL under the d_lock, and just return 0 if so. Finally, we still need to kick off a renewal job if the lease is getting close to expiration. If that's the case, then just drop out of rcuwalk mode since that could block. Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Yan, Zheng <zyan@redhat.com>
| * ceph: clear d_fsinfo pointer under d_lockJeff Layton2016-07-281-1/+5
| | | | | | | | | | | | | | | | | | | | | | To check for a valid dentry lease, we need to get at the ceph_dentry_info. Under rcuwalk though, we may end up with a dentry that is on its way to destruction. Since we need to take the d_lock in dentry_lease_is_valid already, we can just ensure that we clear the d_fsinfo pointer out under the same lock before destroying it. Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Yan, Zheng <zyan@redhat.com>
| * ceph: remove ceph_mdsc_lease_releaseJeff Layton2016-07-282-45/+0
| | | | | | | | | | | | | | Nothing calls it. Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Yan, Zheng <zyan@redhat.com>
| * ceph: don't use ->d_timeMiklos Szeredi2016-07-284-8/+8
| | | | | | | | | | | | | | Pretty simple: just use ceph_dentry_info.time instead (which was already there, unused). Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
| * ceph: fix spelling mistake: "resgister" -> "register"Colin Ian King2016-07-281-1/+1
| | | | | | | | | | | | trivial fix to spelling mistake in pr_err message Signed-off-by: Colin Ian King <colin.king@canonical.com>
| * ceph: fix NULL dereference in ceph_queue_cap_snap()Yan, Zheng2016-07-281-1/+1
| | | | | | | | | | | | old_snapc->seq is used in dout(...) Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: wait unsafe sync writes for evicting inodeYan, Zheng2016-07-285-48/+61
| | | | | | | | | | | | Otherwise ceph_sync_write_unsafe() may access/modify freed inode. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: fix use-after-free bug in ceph_direct_read_write()Yan, Zheng2016-07-281-2/+5
| | | | | | | | | | | | | | ceph_aio_complete() can free the ceph_aio_request struct before the code exits the while loop. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: reduce i_nr_by_mode array sizeYan, Zheng2016-07-284-22/+35
| | | | | | | | | | | | | | Track usage count for individual fmode bit. This can reduce the array size by half. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: set user pages dirty after direct IO readYan, Zheng2016-07-281-2/+2
| | | | | | | | Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: rados pool namespace supportYan, Zheng2016-07-288-77/+159
| | | | | | | | | | | | | | | | This patch adds codes that decode pool namespace information in cap message and request reply. Pool namespace is saved in i_layout, it will be passed to libceph when doing read/write. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * libceph: rados pool namespace supportYan, Zheng2016-07-281-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | Add pool namesapce pointer to struct ceph_file_layout and struct ceph_object_locator. Pool namespace is used by when mapping object to PG, it's also used when composing OSD request. The namespace pointer in struct ceph_file_layout is RCU protected. So libceph can read namespace without taking lock. Signed-off-by: Yan, Zheng <zyan@redhat.com> [idryomov@gmail.com: ceph_oloc_destroy(), misc minor changes] Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
| * libceph: define new ceph_file_layout structureYan, Zheng2016-07-287-45/+43
| | | | | | | | | | | | | | | | Define new ceph_file_layout structure and rename old ceph_file_layout to ceph_file_layout_legacy. This is preparation for adding namespace to ceph_file_layout structure. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * libceph: add an ONSTACK initializer for oidsIlya Dryomov2016-07-281-1/+1
| | | | | | | | | | | | | | | | | | | | An on-stack oid in ceph_ioctl_get_dataloc() is not initialized, resulting in a WARN and a NULL pointer dereference later on. We will have more of these on-stack in the future, so fix it with a convenience macro. Fixes: d30291b985d1 ("libceph: variable-sized ceph_object_id") Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
* | Merge branch 'salted-string-hash'Linus Torvalds2016-07-282-3/+3
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This changes the vfs dentry hashing to mix in the parent pointer at the _beginning_ of the hash, rather than at the end. That actually improves both the hash and the code generation, because we can move more of the computation to the "static" part of the dcache setup, and do less at lookup runtime. It turns out that a lot of other hash users also really wanted to mix in a base pointer as a 'salt' for the hash, and so the slightly extended interface ends up working well for other cases too. Users that want a string hash that is purely about the string pass in a 'salt' pointer of NULL. * merge branch 'salted-string-hash': fs/dcache.c: Save one 32-bit multiply in dcache lookup vfs: make the string hashes salt the hash
| * vfs: make the string hashes salt the hashLinus Torvalds2016-06-102-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We always mixed in the parent pointer into the dentry name hash, but we did it late at lookup time. It turns out that we can simplify that lookup-time action by salting the hash with the parent pointer early instead of late. A few other users of our string hashes also wanted to mix in their own pointers into the hash, and those are updated to use the same mechanism. Hash users that don't have any particular initial salt can just use the NULL pointer as a no-salt. Cc: Vegard Nossum <vegard.nossum@oracle.com> Cc: George Spelvin <linux@sciencehorizons.net> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Use the right predicate in ->atomic_open() instancesAl Viro2016-07-051-1/+1
| | | | | | | | | | | | | | | | ->atomic_open() can be given an in-lookup dentry *or* a negative one found in dcache. Use d_in_lookup() to tell one from another, rather than d_unhashed(). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | Merge branch 'for-linus' of ↵Linus Torvalds2016-07-011-7/+3
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs fixes from Al Viro: "Tmpfs readdir throughput regression fix (this cycle) + some -stable fodder all over the place. One missing bit is Miklos' tonight locks.c fix - NFS folks had already grabbed that one by the time I woke up ;-)" [ The locks.c fix came through the nfsd tree just moments ago ] * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: namespace: update event counter when umounting a deleted dentry 9p: use file_dentry() ceph: fix d_obtain_alias() misuses lockless next_positive() libfs.c: new helper - next_positive() dcache_{readdir,dir_lseek}(): don't bother with nested ->d_lock
| * ceph: fix d_obtain_alias() misusesAl Viro2016-06-241-7/+3
| | | | | | | | | | | | on failure d_obtain_alias() will have done iput() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | ceph: use i_version to check validity of fscacheYan, Zheng2016-06-011-0/+3
| | | | | | | | Signed-off-by: Yan, Zheng <zyan@redhat.com>
* | ceph: improve fscache revalidationYan, Zheng2016-06-014-83/+41
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are several issues in fscache revalidation code. - In ceph_revalidate_work(), fscache_invalidate() is called when fscache_check_consistency() return 0. This is complete wrong because 0 means cache is valid. - Handle_cap_grant() calls ceph_queue_revalidate() if client already has CAP_FILE_CACHE. This code is confusing. Client should revalidate the cache each time it got CAP_FILE_CACHE anew. - In Handle_cap_grant(), fscache_invalidate() is called if MDS revokes CAP_FILE_CACHE. This is inconsistency with the case that inode get evicted. In the later case, the cache is not discarded. Client may use the cache when inode is reloaded. This patch moves the fscache revalidation into ceph_get_caps(). Client revalidates the cache after it gets CAP_FILE_CACHE. i_rdcache_gen should keep constance while CAP_FILE_CACHE is used. If i_fscache_gen is not equal to i_rdcache_gen, client needs to check cache's consistency. Signed-off-by: Yan, Zheng <zyan@redhat.com>
* | ceph: disable fscache when inode is opened for writeYan, Zheng2016-06-014-53/+52
| | | | | | | | | | | | | | | | All other filesystems do not add dirty pages to fscache. They all disable fscache when inode is opened for write. Only ceph adds dirty pages to fscache, but the code is buggy. Signed-off-by: Yan, Zheng <zyan@redhat.com>
* | ceph: avoid unnecessary fscache invalidation/revlidationYan, Zheng2016-06-011-6/+3
| | | | | | | | | | | | | | ceph_fill_file_size() has already called ceph_fscache_invalidate() if it return true. Signed-off-by: Yan, Zheng <zyan@redhat.com>
* | ceph: call __fscache_uncache_page() if readpages failsYan, Zheng2016-06-011-1/+3
| | | | | | | | | | | | If readpages fails, fscache needs to cleanup its internal state. Signed-off-by: Yan, Zheng <zyan@redhat.com>
* | libceph: change ceph_osdmap_flag() to take osdcIlya Dryomov2016-05-301-4/+4
|/ | | | | | | For the benefit of every single caller, take osdc instead of map. Also, now that osdc->osdmap can't ever be NULL, drop the check. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
* Merge branch 'for-linus' of ↵Linus Torvalds2016-05-271-3/+4
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs fixes from Al Viro: "Followups to the parallel lookup work: - update docs - restore killability of the places that used to take ->i_mutex killably now that we have down_write_killable() merged - Additionally, it turns out that I missed a prerequisite for security_d_instantiate() stuff - ->getxattr() wasn't the only thing that could be called before dentry is attached to inode; with smack we needed the same treatment applied to ->setxattr() as well" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: switch ->setxattr() to passing dentry and inode separately switch xattr_handler->set() to passing dentry and inode separately restore killability of old mutex_lock_killable(&inode->i_mutex) users add down_write_killable_nested() update D/f/directory-locking
| * switch xattr_handler->set() to passing dentry and inode separatelyAl Viro2016-05-271-3/+4
| | | | | | | | | | | | | | preparation for similar switch in ->setxattr() (see the next commit for rationale). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | Merge branch 'for-linus' of ↵Linus Torvalds2016-05-2614-418/+773
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client Pull Ceph updates from Sage Weil: "This changeset has a few main parts: - Ilya has finished a huge refactoring effort to sync up the client-side logic in libceph with the user-space client code, which has evolved significantly over the last couple years, with lots of additional behaviors (e.g., how requests are handled when cluster is full and transitions from full to non-full). This structure of the code is more closely aligned with userspace now such that it will be much easier to maintain going forward when behavior changes take place. There are some locking improvements bundled in as well. - Zheng adds multi-filesystem support (multiple namespaces within the same Ceph cluster) - Zheng has changed the readdir offsets and directory enumeration so that dentry offsets are hash-based and therefore stable across directory fragmentation events on the MDS. - Zheng has a smorgasbord of bug fixes across fs/ceph" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (71 commits) ceph: fix wake_up_session_cb() ceph: don't use truncate_pagecache() to invalidate read cache ceph: SetPageError() for writeback pages if writepages fails ceph: handle interrupted ceph_writepage() ceph: make ceph_update_writeable_page() uninterruptible libceph: make ceph_osdc_wait_request() uninterruptible ceph: handle -EAGAIN returned by ceph_update_writeable_page() ceph: make fault/page_mkwrite return VM_FAULT_OOM for -ENOMEM ceph: block non-fatal signals for fault/page_mkwrite ceph: make logical calculation functions return bool ceph: tolerate bad i_size for symlink inode ceph: improve fragtree change detection ceph: keep leaf frag when updating fragtree ceph: fix dir_auth check in ceph_fill_dirfrag() ceph: don't assume frag tree splits in mds reply are sorted ceph: fix inode reference leak ceph: using hash value to compose dentry offset ceph: don't forbid marking directory complete after forward seek ceph: record 'offset' for each entry of readdir result ceph: define 'end/complete' in readdir reply as bit flags ...
| * ceph: fix wake_up_session_cb()Yan, Zheng2016-05-261-1/+1
| | | | | | | | | | | | | | We should reset i_requested_max_size before waking the waiters. (zero i_requested_max_size make waiter re-request the max size) Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: don't use truncate_pagecache() to invalidate read cacheYan, Zheng2016-05-262-5/+7
| | | | | | | | | | | | | | | | | | truncate_pagecache() drops dirty pages, it's dangerous to use it to invalidate read cache. Besides, we shouldn't start invalidating read cache while there are buffer writers. Because buffer writers may add dirty pages later. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: SetPageError() for writeback pages if writepages failsYan, Zheng2016-05-261-1/+3
| | | | | | | | Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: handle interrupted ceph_writepage()Yan, Zheng2016-05-261-4/+18
| | | | | | | | | | | | | | | | writepage() can be interrupted when it's called by direct memory reclaimer (the direct memory relaimer is killed). To avoid lossing data, we redirty the page. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: make ceph_update_writeable_page() uninterruptibleYan, Zheng2016-05-261-1/+1
| | | | | | | | | | | | | | ceph_update_writeable_page() is used by ceph_write_begin(). It beaks atomicity of write operation if it's interruptible. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: handle -EAGAIN returned by ceph_update_writeable_page()Yan, Zheng2016-05-261-13/+15
| | | | | | | | | | | | | | when ceph_update_writeable_page() return -EAGAIN, caller should lock the page and call ceph_update_writeable_page() again. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: make fault/page_mkwrite return VM_FAULT_OOM for -ENOMEMYan, Zheng2016-05-261-20/+17
| | | | | | | | Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: block non-fatal signals for fault/page_mkwriteYan, Zheng2016-05-261-27/+39
| | | | | | | | | | | | | | | | Fault and page_mkwrite are supposed to be uninterruptable. But they call ceph functions that are interruptible. So they should block signals before calling functions that are interruptible Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: make logical calculation functions return boolZhang Zhuoyu2016-05-262-2/+2
| | | | | | | | | | | | | | | | | | | | This patch makes serverl logical caculation functions return bool to improve readability due to these particular functions only using 0/1 as their return value. No functional change. Signed-off-by: Zhang Zhuoyu <zhangzhuoyu@cmss.chinamobile.com>
| * ceph: tolerate bad i_size for symlink inodeYan, Zheng2016-05-261-7/+15
| | | | | | | | | | | | A mds bug can cause symlink's size to be truncated to zero. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: improve fragtree change detectionYan, Zheng2016-05-262-4/+21
| | | | | | | | | | | | | | check if number of splits in i_fragtree is equal to number of splits in mds reply Signed-off-by: Yan, Zheng <zyan@redhat.com>
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