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path: root/fs/ceph/inode.c
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2013-01-17ceph: Fix __ceph_do_pending_vmtruncateYan, Zheng1-6/+9
we should set i_truncate_pending to 0 after page cache is truncated to i_truncate_size Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> Signed-off-by: Sage Weil <sage@inktank.com> (cherry picked from commit a85f50b6ef93fbbb2ae932ce9b2376509d172796) Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-17ceph: tolerate (and warn on) extraneous dentry from mdsSage Weil1-5/+10
If the MDS gives us a dentry and we weren't prepared to handle it, WARN_ON_ONCE instead of crashing. Reported-by: Yan, Zheng <zheng.z.yan@intel.com> Signed-off-by: Sage Weil <sage@inktank.com> Reviewed-by: Alex Elder <elder@inktank.com> (cherry picked from commit 6c5e50fa614fea5325a2973be06f7ec6f1055316) Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-03-22ceph: avoid panic with mismatched symlink sizes in fill_inode()Xi Wang1-5/+6
Return -EINVAL rather than panic if iinfo->symlink_len and inode->i_size do not match. Also use kstrndup rather than kmalloc/memcpy. Signed-off-by: Xi Wang <xi.wang@gmail.com> Reviewed-by: Alex Elder <elder@dreamhost.com>
2012-01-13Merge branch 'for-linus' of ↵Linus Torvalds1-1/+2
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: ensure prealloc_blob is in place when removing xattr rbd: initialize snap_rwsem in rbd_add() ceph: enable/disable dentry complete flags via mount option vfs: export symbol d_find_any_alias() ceph: always initialize the dentry in open_root_dentry() libceph: remove useless return value for osd_client __send_request() ceph: avoid iput() while holding spinlock in ceph_dir_fsync ceph: avoid useless dget/dput in encode_fh ceph: dereference pointer after checking for NULL crush: fix force for non-root TAKE ceph: remove unnecessary d_fsdata conditional checks ceph: Use kmemdup rather than duplicating its implementation Fix up conflicts in fs/ceph/super.c (d_alloc_root() failure handling vs always initialize the dentry in open_root_dentry)
2012-01-10ceph: dereference pointer after checking for NULLYehuda Sadeh1-1/+2
moved dereference after BUG_ON Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
2012-01-03vfs: fix the stupidity with i_dentry in inode destructorsAl Viro1-1/+0
Seeing that just about every destructor got that INIT_LIST_HEAD() copied into it, there is no point whatsoever keeping this INIT_LIST_HEAD in inode_init_once(); the cost of taking it into inode_init_always() will be negligible for pipes and sockets and negative for everything else. Not to mention the removal of boilerplate code from ->destroy_inode() instances... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-12-07ceph: use i_ceph_lock instead of i_lockSage Weil1-25/+28
We have been using i_lock to protect all kinds of data structures in the ceph_inode_info struct, including lists of inodes that we need to iterate over while avoiding races with inode destruction. That requires grabbing a reference to the inode with the list lock protected, but igrab() now takes i_lock to check the inode flags. Changing the list lock ordering would be a painful process. However, using a ceph-specific i_ceph_lock in the ceph inode instead of i_lock is a simple mechanical change and avoids the ordering constraints imposed by igrab(). Reported-by: Amon Ott <a.ott@m-privacy.de> Signed-off-by: Sage Weil <sage@newdream.net>
2011-11-05ceph: fix iput race when queueing inode workSage Weil1-3/+6
If we queue a work item that calls iput(), make sure we ihold() before attempting to queue work. Otherwise our queued work might miraculously run before we notice the queue_work() succeeded and call ihold(), allowing the inode to be destroyed. That is, instead of if (queue_work(...)) ihold(); we need to do ihold(); if (!queue_work(...)) iput(); Reported-by: Amon Ott <a.ott@m-privacy.de> Signed-off-by: Sage Weil <sage@newdream.net>
2011-11-05ceph: use new D_COMPLETE dentry flagSage Weil1-4/+4
We used to use a flag on the directory inode to track whether the dcache contents for a directory were a complete cached copy. Switch to a dentry flag CEPH_D_COMPLETE that is safely updated by ->d_prune(). Signed-off-by: Sage Weil <sage@newdream.net>
2011-11-02filesystems: add set_nlink()Miklos Szeredi1-1/+1
Replace remaining direct i_nlink updates with a new set_nlink() updater function. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Tested-by: Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2011-10-25Revert "ceph: don't truncate dirty pages in invalidate work thread"Sage Weil1-45/+1
This reverts commit c9af9fb68e01eb2c2165e1bc45cfeeed510c64e6. We need to block and truncate all pages in order to reliably invalidate them. Otherwise, we could: - have some uptodate pages in the cache - queue an invalidate - write(2) locks some pages - invalidate_work skips them - write(2) only overwrites part of the page - page now dirty and uptodate -> partial leakage of invalidated data It's not entirely clear why we started skipping locked pages in the first place. I just ran this through fsx and didn't see any problems. Signed-off-by: Sage Weil <sage@newdream.net>
2011-07-26Merge branch 'for-linus' of ↵Linus Torvalds1-21/+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: (23 commits) ceph: document unlocked d_parent accesses ceph: explicitly reference rename old_dentry parent dir in request ceph: document locking for ceph_set_dentry_offset ceph: avoid d_parent in ceph_dentry_hash; fix ceph_encode_fh() hashing bug ceph: protect d_parent access in ceph_d_revalidate ceph: protect access to d_parent ceph: handle racing calls to ceph_init_dentry ceph: set dir complete frag after adding capability rbd: set blk_queue request sizes to object size ceph: set up readahead size when rsize is not passed rbd: cancel watch request when releasing the device ceph: ignore lease mask ceph: fix ceph_lookup_open intent usage ceph: only link open operations to directory unsafe list if O_CREAT|O_TRUNC ceph: fix bad parent_inode calc in ceph_lookup_open ceph: avoid carrying Fw cap during write into page cache libceph: don't time out osd requests that haven't been received ceph: report f_bfree based on kb_avail rather than diffing. ceph: only queue capsnap if caps are dirty ceph: fix snap writeback when racing with writes ...
2011-07-26ceph: document locking for ceph_set_dentry_offsetSage Weil1-1/+3
Reviewed-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
2011-07-26ceph: protect access to d_parentSage Weil1-1/+3
d_parent is protected by d_lock: use it when looking up a dentry's parent directory inode. Also take a reference and drop it in the caller to avoid a use-after-free. Reported-by: Al Viro <viro@ZenIV.linux.org.uk> Reviewed-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
2011-07-26ceph: set dir complete frag after adding capabilitySage Weil1-13/+17
Curretly ceph_add_cap clears the complete bit if we are newly issued the FILE_SHARED cap, which is normally the case for a newly issue cap on a new directory. That means we clear the just-set bit. Move the check that sets the flag to after the cap is added/updated. Reviewed-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
2011-07-26ceph: ignore lease maskSage Weil1-6/+4
The lease mask is no longer used (and it changed a while back). Instead, use a non-zero duration to indicate that there is a lease being issued. Reviewed-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
2011-07-20->permission() sanitizing: don't pass flags to ->permission()Al Viro1-2/+2
not used by the instances anymore. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20->permission() sanitizing: don't pass flags to generic_permission()Al Viro1-1/+1
redundant; all callers get it duplicated in mask & MAY_NOT_BLOCK and none of them removes that bit. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-20kill check_acl callback of generic_permission()Al Viro1-1/+1
its value depends only on inode and does not change; we might as well store it in ->i_op->check_acl and be done with that. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-07ceph: use ihold when we already have an inode refSage Weil1-8/+10
We should use ihold whenever we already have a stable inode ref, even when we aren't holding i_lock. This avoids adding new and unnecessary locking dependencies. Signed-off-by: Sage Weil <sage@newdream.net>
2011-05-11ceph: do not use i_wrbuffer_ref as refcount for Fb capHenry C Chang1-0/+1
We increments i_wrbuffer_ref when taking the Fb cap. This breaks the dirty page accounting and causes looping in __ceph_do_pending_vmtruncate, and ceph client hangs. This bug can be reproduced occasionally by running blogbench. Add a new field i_wb_ref to inode and dedicate it to Fb reference counting. Signed-off-by: Henry C Chang <henry.cy.chang@gmail.com> Signed-off-by: Sage Weil <sage@newdream.net>
2011-05-04ceph: do not call __mark_dirty_inode under i_lockSage Weil1-1/+5
The __mark_dirty_inode helper now takes i_lock as of 250df6ed. Fix the one ceph callers that held i_lock (__ceph_mark_dirty_caps) to return the flags value so that the callers can do it outside of i_lock. Signed-off-by: Sage Weil <sage@newdream.net>
2011-03-21ceph: add ino32 mount optionYehuda Sadeh1-1/+8
The ino32 mount option forces the ceph fs to report 32 bit ino values. This is useful for 64 bit kernels with 32 bit userspace. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
2011-03-15ceph: preserve I_COMPLETE across renameSage Weil1-8/+8
d_move puts the renamed dentry at the end of d_subdirs, screwing with our cached dentry directory offsets. We were just clearing I_COMPLETE to avoid any possibility of trouble. However, assigning the renamed dentry an offset at the end of the directory (to match it's new d_subdirs position) is sufficient to maintain correct behavior and hold onto I_COMPLETE. This is especially important for workloads like rsync, which renames files into place. Before, we would lose I_COMPLETE and do MDS lookups for each file. With this patch we only talk to the MDS on create and rename. Signed-off-by: Sage Weil <sage@newdream.net>
2011-03-03ceph: do not set I_COMPLETESage Weil1-1/+1
Do not set the I_COMPLETE flag on directories until we resolve races with dcache pruning. Signed-off-by: Sage Weil <sage@newdream.net>
2011-01-28Merge branch 'for-linus' of ↵Linus Torvalds1-5/+5
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
2011-01-13ceph: fix getattr on directory when using norbytesYehuda Sadeh1-5/+5
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>
2011-01-13Merge branch 'for-linus' of ↵Linus Torvalds1-0/+4
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
2011-01-12ceph: implement DIRLAYOUTHASH feature to get dir layout from MDSSage Weil1-0/+2
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>
2011-01-12ceph: add dir_layout to inodeSage Weil1-0/+2
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>
2011-01-07fs: provide rcu-walk aware permission i_opsNick Piggin1-3/+8
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
2011-01-07fs: icache RCU free inodesNick Piggin1-1/+10
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>
2011-01-07fs: dcache remove dcache_lockNick Piggin1-4/+0
dcache_lock no longer protects anything. remove it. Signed-off-by: Nick Piggin <npiggin@kernel.dk>
2011-01-07fs: dcache scale subdirsNick Piggin1-2/+6
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>
2011-01-07fs: dcache scale dentry refcountNick Piggin1-2/+2
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>
2010-11-19Merge branch 'for-linus' of ↵Linus Torvalds1-18/+31
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"
2010-11-17BKL: remove extraneous #include <smp_lock.h>Arnd Bergmann1-1/+0
The big kernel lock has been removed from all these files at some point, leaving only the #include. Remove this too as a cleanup. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-09ceph: make page alignment explicit in osd interfaceSage Weil1-1/+1
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>
2010-11-08ceph: fix update of ctime from MDSSage Weil1-2/+4
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>
2010-11-08ceph: fix version check on racing inode updatesSage Weil1-4/+9
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>
2010-11-08ceph: fix rdcache_gen usage and invalidateSage Weil1-9/+7
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>
2010-11-07ceph: only let auth caps update max_sizeSage Weil1-1/+8
Only the auth MDS has a meaningful max_size value for us, so only update it in fill_inode if we're being issued an auth cap. Otherwise, a random stat result from a non-auth MDS can clobber a meaningful max_size, get the client<->mds cap state out of sync, and make writes hang. Specifically, even if the client re-requests a larger max_size (which it will), the MDS won't respond because as far as it knows we already have a sufficiently large value. Signed-off-by: Sage Weil <sage@newdream.net>
2010-11-07ceph: fix bad pointer dereference in ceph_fill_traceSage Weil1-1/+2
We dereference *in a few lines down, but only set it on rename. It is apparently pretty rare for this to trigger, but I have been hitting it with a clustered MDSs. Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-20ceph: factor out libceph from Ceph file systemYehuda Sadeh1-9/+10
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>
2010-09-13ceph: fix dn offset during readdir_prepopulateSage Weil1-5/+6
When adding the readdir results to the cache, ceph_set_dentry_offset was clobbered our just-set offset. This can cause the readdir result offsets to get out of sync with the server. Add an argument to the helper so that it does not. This bug was introduced by 1cd3935bedccf592d44343890251452a6dd74fc4. Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-25ceph: ceph_get_inode() returns an ERR_PTRDan Carpenter1-2/+2
ceph_get_inode() returns an ERR_PTR and it doesn't return a NULL. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-22ceph: don't improperly set dir complete when holding EXCL capSage Weil1-0/+1
If we hold the EXCL cap, we cannot trust the dir stats from the MDS (num files, subdirs) and must not incorrectly conclude that the directory is empty. If we do, we get can bad results from lookup (bad ENOENT) and bad readdir results. Signed-off-by: Sage Weil <sage@newdream.net>
2010-08-01ceph: perform lazy reads when file mode and caps permitSage Weil1-2/+3
If the file mode is marked as "lazy," perform cached/buffered reads when the caps permit it. Adjust the rdcache_gen and invalidation logic accordingly so that we manage our cache based on the FILE_CACHE -or- FILE_LAZYIO cap bits. Signed-off-by: Sage Weil <sage@newdream.net>
2010-07-27ceph: use complete_all and wake_up_allYehuda Sadeh1-1/+1
This fixes an issue triggered by running concurrent syncs. One of the syncs would go through while the other would just hang indefinitely. In any case, we never actually want to wake a single waiter, so the *_all functions should be used. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
2010-07-23ceph: fix leak of dentry in ceph_init_dentry() error pathSage Weil1-1/+3
If we fail to allocate a ceph_dentry_info, don't leak the dn reference. Signed-off-by: Sage Weil <sage@newdream.net>
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