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* ceph: fix d_revalidate oopsen on NFS exportsAl Viro2011-03-10
| | | | | | can't blindly check nd->flags in ->d_revalidate() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* ceph: no .snap inside of snapped namespaceSage Weil2011-03-04
| | | | | | | | | | | Otherwise you can do things like # mkdir .snap/foo # cd .snap/foo/.snap # ls <badness> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: do not clear I_COMPLETE from d_releaseSage Weil2011-03-03
| | | | | | | | | First, this was racy anyway: d_release isn't called until well after the dentry is unhashed. Second, this runs afoul of the recent dcache change that clears d_parent prior to calling d_release (949854d0), causing a NULL pointer dereference. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: do not set I_COMPLETESage Weil2011-03-03
| | | | | | | Do not set the I_COMPLETE flag on directories until we resolve races with dcache pruning. Signed-off-by: Sage Weil <sage@newdream.net>
* Revert "ceph: keep reference to parent inode on ceph_dentry"Sage Weil2011-03-03
| | | | | | | | | This reverts commit 97d79b403ef03f729883246208ef5d8a2ebc4d68. This fails to account for d_parent changes due to rename or disconnected dentries due to submounts or NFS reexports. Signed-off-by: Sage Weil <sage@newdream.net>
* Merge branch 'for-linus' of ↵Linus Torvalds2011-02-21
|\ | | | | | | | | | | | | | | | | | | 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: keep reference to parent inode on ceph_dentry ceph: queue cap_snaps once per realm libceph: fix socket write error handling libceph: fix socket read error handling
| * ceph: keep reference to parent inode on ceph_dentryYehuda Sadeh2011-02-19
| | | | | | | | | | | | | | | | | | | | | | When creating a new dentry we now hold a reference to the parent inode in the ceph_dentry. This is required due to the new RCU changes from 949854d0, which set dentry->d_parent to NULL in d_kill before calling the ->release() callback. If/when that behavior is changed, we can revert this hack. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: queue cap_snaps once per realmSage Weil2011-02-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We were forming a dirty list, and then queueing cap_snaps for each realm _and_ its children, regardless of whether the children were already in the dirty list. This meant we did it twice for some realms. Which in turn meant we corrupted mdsc->snap_flush_list when the cap_snap was re-added to the list it was already on, and could trigger an infinite loop. We were also using recursion to do reach all the children, a no-no when stack is limited. Instead, (re)queue any children on the dirty list, avoiding processing anything twice and avoiding any recursion. Signed-off-by: Sage Weil <sage@newdream.net>
* | Merge branch 'for-linus' of ↵Linus Torvalds2011-01-27
|\| | | | | | | | | | | | | | | | | | | | | | | | | 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: avoid picking MDS that is not active ceph: avoid immediate cap check after import ceph: fix flushing of caps vs cap import ceph: fix erroneous cap flush to non-auth mds ceph: fix cap_wanted_delay_{min,max} mount option initialization ceph: fix xattr rbtree search ceph: fix getattr on directory when using norbytes
| * ceph: avoid picking MDS that is not activeSage Weil2011-01-25
| | | | | | | | | | | | | | | | | | | | Ignore replication or auth frag data if it indicates an MDS that is not active. This can happen if the MDS shuts down and the client has stale data about the namespace distribution across the MDS cluster. If that's the case, fall back to directing the request based on the auth cap (which should always be accurate). Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: avoid immediate cap check after importSage Weil2011-01-19
| | | | | | | | | | | | | | | | The NODELAY flag avoids the heuristics that delay cap (issued/wanted) release. There's no reason for that after we import a cap, and it kills whatever benefit we get from those delays. Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: fix flushing of caps vs cap importSage Weil2011-01-19
| | | | | | | | | | | | | | | | | | | | If we are mid-flush and a cap is migrated to another node, we need to resend the cap flush message to the new MDS, and do so with the original flush_seq to avoid leaking across a sync boundary. Previously we didn't redo the flush (we only flushed newly dirty data), which would cause a later sync to hang forever. Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: fix erroneous cap flush to non-auth mdsSage Weil2011-01-19
| | | | | | | | | | | | | | | | The int flushing is global and not clear on each iteration of the loop, which can cause a second flush of caps to any MDSs with ids greater than the auth. Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: fix cap_wanted_delay_{min,max} mount option initializationSage Weil2011-01-19
| | | | | | | | | | | | | | These were initialized to 0 instead of the default, fallout from the RBD refactor in 3d14c5d2b6e15c21d8e5467dc62d33127c23a644. Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: fix xattr rbtree searchSage Weil2011-01-13
| | | | | | | | | | | | | | | | | | | | | | | | | | Fix xattr name comparison in rbtree search for strings that share a prefix. The *name argument is null terminated, but the xattr name is not, so we need to use strncmp, but that means adjusting for the case where name is a prefix of xattr->name. The corresponding case in __set_xattr() already handles this properly (although in that case *name is also not null terminated). Reported-by: Sergiy Kibrik <sakib@meta.ua> Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: fix getattr on directory when using norbytesYehuda Sadeh2011-01-13
| | | | | | | | | | | | | | | | | | The norbytes mount option was broken, and when doing getattr on a directory it return the rbytes instead of the number of entities. This commit fixes it. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* | 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: fsc->*_wq's aren't used in memory reclaim pathTejun Heo2011-01-12
| | | | | | | | | | | | | | | | | | | | fsc->*_wq's aren't depended upon during memory reclaim. Convert to alloc_workqueue() w/o WQ_MEM_RECLAIM. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Sage Weil <sage@newdream.net> Cc: ceph-devel@vger.kernel.org Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: Makefile: Remove unnessary codeTracey Dent2011-01-12
| | | | | | | | | | | | | | | | | | | | | | | | Remove the if and else conditional because the code is in mainline and there is no need in it being there. Also, Changed Makefile to use <modules>-y instead of <modules>-objs because -objs is deprecated and not mentioned in Documentation/kbuild/makefiles.txt. Signed-off-by: Tracey Dent <tdent48227@gmail.com> Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: associate requests with opening sessionsSage Weil2011-01-12
| | | | | | | | | | | | | | Associate request with sessions that aren't yep open. This makes the debugfs mdsc request list more informative. Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: drop redundant r_mds fieldSage Weil2011-01-12
| | | | | | | | | | | | | | The r_mds field is redundant, since we can find the same information at r_session->s_mds, and when r_session is NULL then r_mds is meaningless. Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: implement DIRLAYOUTHASH feature to get dir layout from MDSSage Weil2011-01-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This implements the DIRLAYOUTHASH protocol feature, which passes the dir layout over the wire from the MDS. This gives the client knowledge of the correct hash function to use for mapping dentries among dir fragments. Note that if this feature is _not_ present on the client but is on the MDS, the client may misdirect requests. This will result in a forward and degrade performance. It may also result in inaccurate NFS filehandle generation, which will prevent fh resolution when the inode is not present in the client cache and the parent directories have been fragmented. Signed-off-by: Sage Weil <sage@newdream.net>
| * 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>
* | fs: rcu-walk aware d_revalidate methodNick Piggin2011-01-07
| | | | | | | | | | | | | | | | Require filesystems be aware of .d_revalidate being called in rcu-walk mode (nd->flags & LOOKUP_RCU). For now do a simple push down, returning -ECHILD from all implementations. Signed-off-by: Nick Piggin <npiggin@kernel.dk>
* | fs: dcache reduce branches in lookup pathNick Piggin2011-01-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Reduce some branches and memory accesses in dcache lookup by adding dentry flags to indicate common d_ops are set, rather than having to check them. This saves a pointer memory access (dentry->d_op) in common path lookup situations, and saves another pointer load and branch in cases where we have d_op but not the particular operation. Patched with: git grep -E '[.>]([[:space:]])*d_op([[:space:]])*=' | xargs sed -e 's/\([^\t ]*\)->d_op = \(.*\);/d_set_d_op(\1, \2);/' -e 's/\([^\t ]*\)\.d_op = \(.*\);/d_set_d_op(\&\1, \2);/' -i Signed-off-by: Nick Piggin <npiggin@kernel.dk>
* | fs: icache RCU free inodesNick Piggin2011-01-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | RCU free the struct inode. This will allow: - Subsequent store-free path walking patch. The inode must be consulted for permissions when walking, so an RCU inode reference is a must. - sb_inode_list_lock to be moved inside i_lock because sb list walkers who want to take i_lock no longer need to take sb_inode_list_lock to walk the list in the first place. This will simplify and optimize locking. - Could remove some nested trylock loops in dcache code - Could potentially simplify things a bit in VM land. Do not need to take the page lock to follow page->mapping. The downsides of this is the performance cost of using RCU. In a simple creat/unlink microbenchmark, performance drops by about 10% due to inability to reuse cache-hot slab objects. As iterations increase and RCU freeing starts kicking over, this increases to about 20%. In cases where inode lifetimes are longer (ie. many inodes may be allocated during the average life span of a single inode), a lot of this cache reuse is not applicable, so the regression caused by this patch is smaller. The cache-hot regression could largely be avoided by using SLAB_DESTROY_BY_RCU, however this adds some complexity to list walking and store-free path walking, so I prefer to implement this at a later date, if it is shown to be a win in real situations. I haven't found a regression in any non-micro benchmark so I doubt it will be a problem. Signed-off-by: Nick Piggin <npiggin@kernel.dk>
* | fs: dcache remove dcache_lockNick Piggin2011-01-07
| | | | | | | | | | | | dcache_lock no longer protects anything. remove it. Signed-off-by: Nick Piggin <npiggin@kernel.dk>
* | fs: dcache scale subdirsNick Piggin2011-01-07
| | | | | | | | | | | | | | | | | | | | | | | | Protect d_subdirs and d_child with d_lock, except in filesystems that aren't using dcache_lock for these anyway (eg. using i_mutex). Note: if we change the locking rule in future so that ->d_child protection is provided only with ->d_parent->d_lock, it may allow us to reduce some locking. But it would be an exception to an otherwise regular locking scheme, so we'd have to see some good results. Probably not worthwhile. Signed-off-by: Nick Piggin <npiggin@kernel.dk>
* | fs: dcache scale d_unhashedNick Piggin2011-01-07
| | | | | | | | | | | | | | Protect d_unhashed(dentry) condition with d_lock. This means keeping DCACHE_UNHASHED bit in synch with hash manipulations. Signed-off-by: Nick Piggin <npiggin@kernel.dk>
* | fs: dcache scale dentry refcountNick Piggin2011-01-07
|/ | | | | | | | Make d_count non-atomic and protect it with d_lock. This allows us to ensure a 0 refcount dentry remains 0 without dcache_lock. It is also fairly natural when we start protecting many other dentry members with d_lock. Signed-off-by: Nick Piggin <npiggin@kernel.dk>
* ceph: mark user pages dirty on direct-io readsHenry C Chang2010-12-17
| | | | | | | | | For read operation, we have to set the argument _write_ of get_user_pages to 1 since we will write data to pages. Also, we need to SetPageDirty before releasing these pages. Signed-off-by: Henry C Chang <henry_c_chang@tcloudcomputing.com> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: fix null pointer dereference in ceph_init_dentry for nfs reexportSage Weil2010-12-17
| | | | | | | The fh_to_dentry etc. methods use ceph_init_dentry(), which assumes that d_parent is defined. It isn't for those callers, so check! Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: fix direct-io on non-page-aligned buffersHenry C Chang2010-12-15
| | | | | | | | | The user buffer may be 512-byte aligned, not page-aligned. We were assuming the buffer was page-aligned and only accounting for non-page-aligned io offsets. Signed-off-by: Henry C Chang <henry_c_chang@tcloudcomputing.com> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: fix ioctl magicSage Weil2010-12-06
| | | | | | The ioctl magic was inadvertently changed in 571dba52. Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: Behave better when handling file lock replies.Herb Shiu2010-12-01
| | | | | | | | | Fill in the local lock with response data if appropriate, and don't call posix_lock_file when reading locks. Signed-off-by: Herb Shiu <herb_shiu@tcloudcomputing.com> Acked-by: Greg Farnum <gregf@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: pass lock information by struct file_lock instead of as individual params.Herb Shiu2010-12-01
| | | | | | Signed-off-by: Herb Shiu <herb_shiu@tcloudcomputing.com> Acked-by: Greg Farnum <gregf@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: Handle file locks in replies from the MDS.Herb Shiu2010-12-01
| | | | | | | | Previously the kernel client incorrectly assumed everything was a directory. Signed-off-by: Herb Shiu <herb_shiu@tcloudcomputing.com> Acked-by: Greg Farnum <gregf@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
* ceph: avoid possible null deref in readdir after dir llseekSage Weil2010-12-01
| | | | | | | | | last may be NULL, but we dereference it in the else branch without checking. Normally it doesn't trigger because last == NULL when fpos == 2, but it could happen on a newly opened dir if the user seeks forward. Reported-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Sage Weil <sage@newdream.net>
* Merge branch 'for-linus' of ↵Linus Torvalds2010-11-19
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: fix readdir EOVERFLOW on 32-bit archs ceph: fix frag offset for non-leftmost frags ceph: fix dangling pointer ceph: explicitly specify page alignment in network messages ceph: make page alignment explicit in osd interface ceph: fix comment, remove extraneous args ceph: fix update of ctime from MDS ceph: fix version check on racing inode updates ceph: fix uid/gid on resent mds requests ceph: fix rdcache_gen usage and invalidate ceph: re-request max_size if cap auth changes ceph: only let auth caps update max_size ceph: fix open for write on clustered mds ceph: fix bad pointer dereference in ceph_fill_trace ceph: fix small seq message skipping Revert "ceph: update issue_seq on cap grant"
| * ceph: fix readdir EOVERFLOW on 32-bit archsSage Weil2010-11-18
| | | | | | | | | | | | | | | | | | | | | | One of the readdir filldir_t callers was passing the raw ceph 64-bit ino instead of the hashed 32-bit one, producing an EOVERFLOW in the filler callback. Fix this by calling the ceph_vino_to_ino() helper to do the conversion. Reported-by: Jan Smets <jan.smets@alcatel-lucent.com> Tested-by: Jan Smets <jan.smets@alcatel-lucent.com> Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: fix frag offset for non-leftmost fragsSage Weil2010-11-11
| | | | | | | | | | | | | | | | We start at offset 2 for the leftmost frag, and 0 for subsequent frags. When we reach the end (rightmost), we go back to 2. This fixes readdir on fragmented (large) directories. Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: fix dangling pointerSage Weil2010-11-11
| | | | | | | | | | | | | | Clear fi->last_name when it's freed. The only caller is rewinddir() (or equivalent lseek). Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: make page alignment explicit in osd interfaceSage Weil2010-11-09
| | | | | | | | | | | | | | | | | | | | | | We used to infer alignment of IOs within a page based on the file offset, which assumed they matched. This broke with direct IO that was not aligned to pages (e.g., 512-byte aligned IO). We were also trusting the alignment specified in the OSD reply, which could have been adjusted by the server. Explicitly specify the page alignment when setting up OSD IO requests. Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: fix comment, remove extraneous argsSage Weil2010-11-09
| | | | | | | | | | | | The offset/length arguments aren't used. Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: fix update of ctime from MDSSage Weil2010-11-08
| | | | | | | | | | | | | | | | | | | | | | | | The client can have a newer ctime than the MDS due to AUTH_EXCL and XATTR_EXCL caps as well; update the check in ceph_fill_file_time appropriately. This fixes cases where ctime/mtime goes backward under the right sequence of local updates (e.g. chmod) and mds replies (e.g. subsequent stat that goes to the MDS). Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: fix version check on racing inode updatesSage Weil2010-11-08
| | | | | | | | | | | | | | | | | | | | | | | | | | We may get updates on the same inode from multiple MDSs; generally we only pay attention if the update is newer than what we already have. The exception is when an MDS sense unstable information, in which case we always update. The old > check got this wrong when our version was odd (e.g. 3) and the reply version was even (e.g. 2): the older stale (v2) info would be applied. Fixed and clarified the comment. Signed-off-by: Sage Weil <sage@newdream.net>
| * ceph: fix uid/gid on resent mds requestsSage Weil2010-11-08
| | | | | | | | | | | | | | | | | | | | | | MDS requests can be rebuilt and resent in non-process context, but were filling in uid/gid from current_fsuid/gid. Put that information in the request struct on request setup. This fixes incorrect (and root) uid/gid getting set for requests that are forwarded between MDSs, usually due to metadata migrations. Signed-off-by: Sage Weil <sage@newdream.net>
| * 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: re-request max_size if cap auth changesSage Weil2010-11-07
| | | | | | | | | | | | | | | | | | If the auth cap migrates to another MDS, clear requested_max_size so that we resend any pending max_size increase requests. This fixes potential hangs on writes that extend a file and race with an cap migration between MDSs. Signed-off-by: Sage Weil <sage@newdream.net>
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