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* wrappers for ->i_mutex accessAl Viro2016-01-223-8/+8
| | | | | | | | | | | parallel to mutex_{lock,unlock,trylock,is_locked,lock_nested}, inode_foo(inode) being mutex_foo(&inode->i_mutex). Please, use those for access to ->i_mutex; over the coming cycle ->i_mutex will become rwsem, with ->lookup() done with it held only shared. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Merge branch 'for-linus' of ↵Linus Torvalds2016-01-171-0/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security Pull security subsystem updates from James Morris: - EVM gains support for loading an x509 cert from the kernel (EVM_LOAD_X509), into the EVM trusted kernel keyring. - Smack implements 'file receive' process-based permission checking for sockets, rather than just depending on inode checks. - Misc enhancments for TPM & TPM2. - Cleanups and bugfixes for SELinux, Keys, and IMA. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (41 commits) selinux: Inode label revalidation performance fix KEYS: refcount bug fix ima: ima_write_policy() limit locking IMA: policy can be updated zero times selinux: rate-limit netlink message warnings in selinux_nlmsg_perm() selinux: export validatetrans decisions gfs2: Invalid security labels of inodes when they go invalid selinux: Revalidate invalid inode security labels security: Add hook to invalidate inode security labels selinux: Add accessor functions for inode->i_security security: Make inode argument of inode_getsecid non-const security: Make inode argument of inode_getsecurity non-const selinux: Remove unused variable in selinux_inode_init_security keys, trusted: seal with a TPM2 authorization policy keys, trusted: select hash algorithm for TPM2 chips keys, trusted: fix: *do not* allow duplicate key options tpm_ibmvtpm: properly handle interrupted packet receptions tpm_tis: Tighten IRQ auto-probing tpm_tis: Refactor the interrupt setup tpm_tis: Get rid of the duplicate IRQ probing code ...
| * gfs2: Invalid security labels of inodes when they go invalidAndreas Gruenbacher2015-12-241-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When gfs2 releases the glock of an inode, it must invalidate all information cached for that inode, including the page cache and acls. Use the new security_inode_invalidate_secctx hook to also invalidate security labels in that case. These items will be reread from disk when needed after reacquiring the glock. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Acked-by: Bob Peterson <rpeterso@redhat.com> Acked-by: Steven Whitehouse <swhiteho@redhat.com> Cc: cluster-devel@redhat.com [PM: fixed spelling errors and description line lengths] Signed-off-by: Paul Moore <pmoore@redhat.com>
* | kmemcg: account certain kmem allocations to memcgVladimir Davydov2016-01-141-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Mark those kmem allocations that are known to be easily triggered from userspace as __GFP_ACCOUNT/SLAB_ACCOUNT, which makes them accounted to memcg. For the list, see below: - threadinfo - task_struct - task_delay_info - pid - cred - mm_struct - vm_area_struct and vm_region (nommu) - anon_vma and anon_vma_chain - signal_struct - sighand_struct - fs_struct - files_struct - fdtable and fdtable->full_fds_bits - dentry and external_name - inode for all filesystems. This is the most tedious part, because most filesystems overwrite the alloc_inode method. The list is far from complete, so feel free to add more objects. Nevertheless, it should be close to "account everything" approach and keep most workloads within bounds. Malevolent users will be able to breach the limit, but this was possible even with the former "account everything" approach (simply because it did not account everything in fact). [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Tejun Heo <tj@kernel.org> Cc: Greg Thelen <gthelen@google.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge tag 'gfs2-merge-window' of ↵Linus Torvalds2016-01-1221-241/+446
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2 Pull GFS2 updates from Bob Peterson: "Here is a list of patches we've accumulated for GFS2 for the current upstream merge window. Last window's set was short, but I warned that this one would be bigger, and so it is. We've got 19 patches: - A patch from Abhi Das to propagate the GFS2_DIF_SYSTEM bit so that newly added journals don't get flagged, deleted, and recreated by fsck.gfs2. - Two patches from Andreas Gruenbacher to improve GFS2 performance where extended attributes are involved. - A patch from Andy Price to fix a suspicious rcu dereference error. - Two patches from Ben Marzinski that rework how GFS2's NFS cookies are managed. This fixes readdir problems with nfs-over-gfs2. - A patch from Ben Marzinski that fixes a race in unmounting GFS2. - A set of four patches from me to move the resource group reservations inside the gfs2 inode to improve performance and fix a bug whereby get_write_access improperly prevented some operations like chown. - A patch from me to spinlock-protect the setting of system statfs file data. This was causing small discrepancies between df and du. - A patch from me to reintroduce a timeout while clearing glocks which was accidentally dropped some time ago. - A patch from me to wait for iopen glock dequeues in order to improve deleting of files that were unlinked from a different cluster node. - A patch from me to ensure metadata address spaces get truncated when an inode is evicted. - A patch from me to fix a bug in which a memory leak could occur in some error cases when inodes were trying to be created. - A patch to consistently use iopen glocks to transition from the unlinked state to the deleted state. - A patch to fix a glock reference count error when inode creation fails. - A patch from Junxiao Bi to fix an flock panic. - A patch from Markus Elfring that removes an unnecessary if" * tag 'gfs2-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2: gfs2: fix flock panic issue GFS2: Don't do glock put on when inode creation fails GFS2: Always use iopen glock for gl_deletes GFS2: Release iopen glock in gfs2_create_inode error cases GFS2: Truncate address space mapping when deleting an inode GFS2: Wait for iopen glock dequeues gfs2: clear journal live bit in gfs2_log_flush gfs2: change gfs2 readdir cookie gfs2: keep offset when splitting dir leaf blocks GFS2: Reintroduce a timeout in function gfs2_gl_hash_clear GFS2: Update master statfs buffer with sd_statfs_spin locked GFS2: Reduce size of incore inode GFS2: Make rgrp reservations part of the gfs2_inode structure GFS2: Extract quota data from reservations structure (revert 5407e24) gfs2: Extended attribute readahead optimization gfs2: Extended attribute readahead GFS2: Use rht_for_each_entry_rcu in glock_hash_walk GFS2: Delete an unnecessary check before the function call "iput" gfs2: Automatically set GFS2_DIF_SYSTEM flag on system files
| * | gfs2: fix flock panic issueJunxiao Bi2015-12-221-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 4f6563677ae8 ("Move locks API users to locks_lock_inode_wait()") moved flock/posix lock identify code to locks_lock_inode_wait(), but missed to set fl_flags to FL_FLOCK which will cause kernel panic in locks_lock_inode_wait(). Fixes: 4f6563677ae8 ("Move locks API users to locks_lock_inode_wait()") Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * | GFS2: Don't do glock put on when inode creation failsBob Peterson2015-12-181-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently the error path of function gfs2_inode_lookup calls function gfs2_glock_put corresponding to an earlier call to gfs2_glock_get for the inode glock. That's wrong because the error path also calls iget_failed() which eventually calls iput, which eventually calls gfs2_evict_inode, which does another gfs2_glock_put. This double-put can cause the glock reference count to get off. Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * | GFS2: Always use iopen glock for gl_deletesBob Peterson2015-12-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Before this patch, when function try_rgrp_unlink queued a glock for delete_work to reclaim the space, it used the inode glock to do so. That's different from the iopen callback which uses the iopen glock for the same purpose. We should be consistent and always use the iopen glock. This may also save us reference counting problems with the inode glock, since clear_glock does an extra glock_put() for the inode glock. Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * | GFS2: Release iopen glock in gfs2_create_inode error casesBob Peterson2015-12-181-9/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some error cases in gfs2_create_inode were not unlocking the iopen glock, getting the reference count off. This adds the proper unlock. The error logic in function gfs2_create_inode was also convoluted, so this patch simplifies it. It also takes care of a bug in which gfs2_qa_delete() was not called in an error case. Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * | GFS2: Truncate address space mapping when deleting an inodeBob Peterson2015-12-181-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In function gfs2_delete_inode() we write and flush the mapping for a glock, among other things. We truncate the mapping for the inode, but we never truncate the mapping for the glock. This patch makes it also truncate the metamapping. This avoid cases where the glock is reused by another process who is trying to recreate an inode in its place using the same block. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Acked-by: Steven Whitehouse <swhiteho@redhat.com>
| * | GFS2: Wait for iopen glock dequeuesBob Peterson2015-12-182-4/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch changes every glock_dq for iopen glocks into a dq_wait. This makes sure that iopen glocks do not outlive the inode itself. In turn, that ensures that anyone trying to unlink the glock will be able to find the inode when it receives a remote iopen callback. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Acked-by: Steven Whitehouse <swhiteho@redhat.com>
| * | gfs2: clear journal live bit in gfs2_log_flushBenjamin Marzinski2015-12-142-4/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When gfs2 was unmounting filesystems or changing them to read-only it was clearing the SDF_JOURNAL_LIVE bit before the final log flush. This caused a race. If an inode glock got demoted in the gap between clearing the bit and the shutdown flush, it would be unable to reserve log space to clear out the active items list in inode_go_sync, causing an error in inode_go_inval because the glock was still dirty. To solve this, the SDF_JOURNAL_LIVE bit is now cleared inside the shutdown log flush. This means that, because of the locking on the log blocks, either inode_go_sync will be able to reserve space to clean the glock before the shutdown flush, or the shutdown flush will clean the glock itself, before inode_go_sync fails to reserve the space. Either way, the glock will be clean before inode_go_inval. Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com> Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * | gfs2: change gfs2 readdir cookieBenjamin Marzinski2015-12-144-20/+89
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | gfs2 currently returns 31 bits of filename hash as a cookie that readdir uses for an offset into the directory. When there are a large number of directory entries, the likelihood of a collision goes up way too quickly. GFS2 will now return cookies that are guaranteed unique for a while, and then fail back to using 30 bits of filename hash. Specifically, the directory leaf blocks are divided up into chunks based on the minimum size of a gfs2 directory entry (48 bytes). Each entry's cookie is based off the chunk where it starts, in the linked list of leaf blocks that it hashes to (there are 131072 hash buckets). Directory entries will have unique names until they take reach chunk 8192. Assuming the largest filenames possible, and the least efficient spacing possible, this new method will still be able to return unique names when the previous method has statistically more than a 99% chance of a collision. The non-unique names it fails back to are guaranteed to not collide with the unique names. unique cookies will be in this format: - 1 bit "0" to make sure the the returned cookie is positive - 17 bits for the hash table index - 1 bit for the mode "0" - 13 bits for the offset non-unique cookies will be in this format: - 1 bit "0" to make sure the the returned cookie is positive - 17 bits for the hash table index - 1 bit for the mode "1" - 13 more bits of the name hash Another benefit of location based cookies, is that once a directory's exhash table is fully extended (so that multiple hash table indexs do not use the same leaf blocks), gfs2 can skip sorting the directory entries until it reaches the non-unique ones, and then it only needs to sort these. This provides a significant speed up for directory reads of very large directories. The only issue is that for these cookies to continue to point to the correct entry as files are added and removed from the directory, gfs2 must keep the entries at the same offset in the leaf block when they are split (see my previous patch). This means that until all the nodes in a cluster are running with code that will split the directory leaf blocks this way, none of the nodes can use the new cookie code. To deal with this, gfs2 now has the mount option loccookie, which, if set, will make it return these new location based cookies. This option must not be set until all nodes in the cluster are at least running this version of the kernel code, and you have guaranteed that there are no outstanding cookies required by other software, such as NFS. gfs2 uses some of the extra space at the end of the gfs2_dirent structure to store the calculated readdir cookies. This keeps us from needing to allocate a seperate array to hold these values. gfs2 recomputes the cookie stored in de_cookie for every readdir call. The time it takes to do so is small, and if gfs2 expected this value to be saved on disk, the new code wouldn't work correctly on filesystems created with an earlier version of gfs2. One issue with adding de_cookie to the union in the gfs2_dirent structure is that it caused the union to align itself to a 4 byte boundary, instead of its previous 2 byte boundary. This changed the offset of de_rahead. To solve that, I pulled de_rahead out of the union, since it does not need to be there. Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com> Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * | gfs2: keep offset when splitting dir leaf blocksBenjamin Marzinski2015-12-141-16/+53
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, when gfs2 splits a directory leaf block, the dirents that need to be copied to the new leaf block are packed into the start of it. This is good for space efficiency. However, if gfs2 were to copy those dirents into the exact same offset in the new leaf block as they had in the old block, it would be able to generate a readdir cookie based on the dirent location, that would be guaranteed to be unique up well past where the current code is statistically almost guaranteed to have collisions. So, gfs2 now keeps the dirent's offset in the block the same when it copies it to the new leaf block. Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com> Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * | GFS2: Reintroduce a timeout in function gfs2_gl_hash_clearBob Peterson2015-12-141-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | At some point in the past, we used to have a timeout when GFS2 was unmounting, trying to clear out its glocks. If the timeout expires, it would dump the remaining glocks to the kernel messages so that developers can debug the problem. That timeout was eliminated, probably by accident. This patch reintroduces it. Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * | GFS2: Update master statfs buffer with sd_statfs_spin lockedBob Peterson2015-12-141-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Before this patch, function update_statfs called gfs2_statfs_change_out to update the master statfs buffer without the sd_statfs_spin held. In theory, another process could call gfs2_statfs_sync, which takes the sd_statfs_spin lock and re-reads m_sc from the buffer. So there's a theoretical timing window in which one process could write the master statfs buffer, then another comes along and re-reads it, wiping out the changes. Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * | GFS2: Reduce size of incore inodeBob Peterson2015-12-145-26/+26
| | | | | | | | | | | | | | | | | | | | | | | | This patch makes no functional changes. Its goal is to reduce the size of the gfs2 inode in memory by rearranging structures and changing the size of some variables within the structure. Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * | GFS2: Make rgrp reservations part of the gfs2_inode structureBob Peterson2015-12-1412-82/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Before this patch, multi-block reservation structures were allocated from a special slab. This patch folds the structure into the gfs2_inode structure. The disadvantage is that the gfs2_inode needs more memory, even when a file is opened read-only. The advantages are: (a) we don't need the special slab and the extra time it takes to allocate and deallocate from it. (b) we no longer need to worry that the structure exists for things like quota management. (c) This also allows us to remove the calls to get_write_access and put_write_access since we know the structure will exist. Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * | GFS2: Extract quota data from reservations structure (revert 5407e24)Bob Peterson2015-11-2413-63/+125
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch basically reverts the majority of patch 5407e24. That patch eliminated the gfs2_qadata structure in favor of just using the reservations structure. The problem with doing that is that it increases the size of the reservations structure. That is not an issue until it comes time to fold the reservations structure into the inode in memory so we know it's always there. By separating out the quota structure again, we aren't punishing the non-quota users by making all the inodes bigger, requiring more slab space. This patch creates a new slab area to allocate the quota stuff so it's managed a little more sanely. Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * | gfs2: Extended attribute readahead optimizationAndreas Gruenbacher2015-11-181-18/+63
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of submitting a READ_SYNC bio for the inode and a READA bio for the inode's extended attributes through submit_bh, submit a single READ_SYNC bio for both through submit_bio when possible. This can be more efficient on some kinds of block devices. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * | gfs2: Extended attribute readaheadAndreas Gruenbacher2015-11-168-14/+46
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When gfs2 allocates an inode and its extended attribute block next to each other at inode create time, the inode's directory entry indicates that in de_rahead. In that case, we can readahead the extended attribute block when we read in the inode. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * | GFS2: Use rht_for_each_entry_rcu in glock_hash_walkAndrew Price2015-11-161-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This lockdep splat was being triggered on umount: [55715.973122] =============================== [55715.980169] [ INFO: suspicious RCU usage. ] [55715.981021] 4.3.0-11553-g8d3de01-dirty #15 Tainted: G W [55715.982353] ------------------------------- [55715.983301] fs/gfs2/glock.c:1427 suspicious rcu_dereference_protected() usage! The code it refers to is the rht_for_each_entry_safe usage in glock_hash_walk. The condition that triggers the warning is lockdep_rht_bucket_is_held(tbl, hash) which is checked in the __rcu_dereference_protected macro. The rhashtable buckets are not changed in glock_hash_walk so it's safe to rely on the rcu protection. Replace the rht_for_each_entry_safe() usage with rht_for_each_entry_rcu(), which doesn't care whether the bucket lock is held if the rcu read lock is held. Signed-off-by: Andrew Price <anprice@redhat.com> Signed-off-by: Bob Peterson <rpeterso@redhat.com> Acked-by: Steven Whitehouse <swhiteho@redhat.com>
| * | GFS2: Delete an unnecessary check before the function call "iput"Markus Elfring2015-11-161-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The iput() function tests whether its argument is NULL and then returns immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * | gfs2: Automatically set GFS2_DIF_SYSTEM flag on system filesAbhi Das2015-11-102-2/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When new files and directories are created inside a parent directory we automatically inherit the GFS2_DIF_SYSTEM flag (if set) and assign it to the new file/dirs. All new system files/dirs created in the metafs by, say gfs2_jadd, will have this flag set because they will have parent directories in the metafs whose GFS2_DIF_SYSTEM flag has already been set (most likely by a previous mkfs.gfs2) Signed-off-by: Abhi Das <adas@redhat.com> Signed-off-by: Bob Peterson <rpeterso@redhat.com>
* | | Merge branch 'work.misc' of ↵Linus Torvalds2016-01-121-3/+1
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull misc vfs updates from Al Viro: "All kinds of stuff. That probably should've been 5 or 6 separate branches, but by the time I'd realized how large and mixed that bag had become it had been too close to -final to play with rebasing. Some fs/namei.c cleanups there, memdup_user_nul() introduction and switching open-coded instances, burying long-dead code, whack-a-mole of various kinds, several new helpers for ->llseek(), assorted cleanups and fixes from various people, etc. One piece probably deserves special mention - Neil's lookup_one_len_unlocked(). Similar to lookup_one_len(), but gets called without ->i_mutex and tries to avoid ever taking it. That, of course, means that it's not useful for any directory modifications, but things like getting inode attributes in nfds readdirplus are fine with that. I really should've asked for moratorium on lookup-related changes this cycle, but since I hadn't done that early enough... I *am* asking for that for the coming cycle, though - I'm going to try and get conversion of i_mutex to rwsem with ->lookup() done under lock taken shared. There will be a patch closer to the end of the window, along the lines of the one Linus had posted last May - mechanical conversion of ->i_mutex accesses to inode_lock()/inode_unlock()/inode_trylock()/ inode_is_locked()/inode_lock_nested(). To quote Linus back then: ----- | This is an automated patch using | | sed 's/mutex_lock(&\(.*\)->i_mutex)/inode_lock(\1)/' | sed 's/mutex_unlock(&\(.*\)->i_mutex)/inode_unlock(\1)/' | sed 's/mutex_lock_nested(&\(.*\)->i_mutex,[ ]*I_MUTEX_\([A-Z0-9_]*\))/inode_lock_nested(\1, I_MUTEX_\2)/' | sed 's/mutex_is_locked(&\(.*\)->i_mutex)/inode_is_locked(\1)/' | sed 's/mutex_trylock(&\(.*\)->i_mutex)/inode_trylock(\1)/' | | with a very few manual fixups ----- I'm going to send that once the ->i_mutex-affecting stuff in -next gets mostly merged (or when Linus says he's about to stop taking merges)" * 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (63 commits) nfsd: don't hold i_mutex over userspace upcalls fs:affs:Replace time_t with time64_t fs/9p: use fscache mutex rather than spinlock proc: add a reschedule point in proc_readfd_common() logfs: constify logfs_block_ops structures fcntl: allow to set O_DIRECT flag on pipe fs: __generic_file_splice_read retry lookup on AOP_TRUNCATED_PAGE fs: xattr: Use kvfree() [s390] page_to_phys() always returns a multiple of PAGE_SIZE nbd: use ->compat_ioctl() fs: use block_device name vsprintf helper lib/vsprintf: add %*pg format specifier fs: use gendisk->disk_name where possible poll: plug an unused argument to do_poll amdkfd: don't open-code memdup_user() cdrom: don't open-code memdup_user() rsxx: don't open-code memdup_user() mtip32xx: don't open-code memdup_user() [um] mconsole: don't open-code memdup_user_nul() [um] hostaudio: don't open-code memdup_user() ...
| * | | fs: use block_device name vsprintf helperDmitry Monakhov2016-01-061-3/+1
| | |/ | |/| | | | | | | | | | Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | Merge branch 'work.xattr' of ↵Linus Torvalds2016-01-114-55/+2
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs xattr updates from Al Viro: "Andreas' xattr cleanup series. It's a followup to his xattr work that went in last cycle; -0.5KLoC" * 'work.xattr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: xattr handlers: Simplify list operation ocfs2: Replace list xattr handler operations nfs: Move call to security_inode_listsecurity into nfs_listxattr xfs: Change how listxattr generates synthetic attributes tmpfs: listxattr should include POSIX ACL xattrs tmpfs: Use xattr handler infrastructure btrfs: Use xattr handler infrastructure vfs: Distinguish between full xattr names and proper prefixes posix acls: Remove duplicate xattr name definitions gfs2: Remove gfs2_xattr_acl_chmod vfs: Remove vfs_xattr_cmp
| * | | posix acls: Remove duplicate xattr name definitionsAndreas Gruenbacher2015-12-062-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove POSIX_ACL_XATTR_{ACCESS,DEFAULT} and GFS2_POSIX_ACL_{ACCESS,DEFAULT} and replace them with the definitions in <include/uapi/linux/xattr.h>. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Reviewed-by: James Morris <james.l.morris@oracle.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | | gfs2: Remove gfs2_xattr_acl_chmodAndreas Gruenbacher2015-12-062-51/+0
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | Function gfs2_xattr_acl_chmod is unused since commit e01580bf. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Reviewed-by: James Morris <james.l.morris@oracle.com> Acked-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | switch ->get_link() to delayed_call, kill ->put_link()Al Viro2015-12-301-4/+4
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | replace ->follow_link() with new method that could stay in RCU modeAl Viro2015-12-081-5/+10
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | new method: ->get_link(); replacement of ->follow_link(). The differences are: * inode and dentry are passed separately * might be called both in RCU and non-RCU mode; the former is indicated by passing it a NULL dentry. * when called that way it isn't allowed to block and should return ERR_PTR(-ECHILD) if it needs to be called in non-RCU mode. It's a flagday change - the old method is gone, all in-tree instances converted. Conversion isn't hard; said that, so far very few instances do not immediately bail out when called in RCU mode. That'll change in the next commits. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | Merge branch 'for-linus-3' of ↵Linus Torvalds2015-11-131-5/+8
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs xattr cleanups from Al Viro. * 'for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: f2fs: xattr simplifications squashfs: xattr simplifications 9p: xattr simplifications xattr handlers: Pass handler to operations instead of flags jffs2: Add missing capability check for listing trusted xattrs hfsplus: Remove unused xattr handler list operations ubifs: Remove unused security xattr handler vfs: Fix the posix_acl_xattr_list return value vfs: Check attribute names in posix acl xattr handers
| * xattr handlers: Pass handler to operations instead of flagsAndreas Gruenbacher2015-11-131-5/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | The xattr_handler operations are currently all passed a file system specific flags value which the operations can use to disambiguate between different handlers; some file systems use that to distinguish the xattr namespace, for example. In some oprations, it would be useful to also have access to the handler prefix. To allow that, pass a pointer to the handler to operations instead of the flags value alone. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | Merge branch 'akpm' (patches from Andrew)Linus Torvalds2015-11-091-1/+1
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge third patch-bomb from Andrew Morton: "We're pretty much done over here - I'm still waiting for a nouveau merge so I can cleanly finish up Christoph's dma-mapping rework. - bunch of small misc stuff - fold abs64() into abs(), remove abs64() - new_valid_dev() cleanups - binfmt_elf_fdpic feature work" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (24 commits) fs/binfmt_elf_fdpic.c: provide NOMMU loader for regular ELF binaries fs/stat.c: remove unnecessary new_valid_dev() check fs/reiserfs/namei.c: remove unnecessary new_valid_dev() check fs/nilfs2/namei.c: remove unnecessary new_valid_dev() check fs/ncpfs/dir.c: remove unnecessary new_valid_dev() check fs/jfs: remove unnecessary new_valid_dev() checks fs/hpfs/namei.c: remove unnecessary new_valid_dev() check fs/f2fs/namei.c: remove unnecessary new_valid_dev() check fs/ext2/namei.c: remove unnecessary new_valid_dev() check fs/exofs/namei.c: remove unnecessary new_valid_dev() check fs/btrfs/inode.c: remove unnecessary new_valid_dev() check fs/9p: remove unnecessary new_valid_dev() checks include/linux/kdev_t.h: old/new_valid_dev() can return bool include/linux/kdev_t.h: remove unused huge_valid_dev() kmap_atomic_to_page() has no users, remove it drivers/scsi/cxgbi: fix build with EXTRA_CFLAGS dma: remove external references to dma_supported Documentation/sysctl/vm.txt: fix misleading code reference of overcommit_memory remove abs64() kernel.h: make abs() work with 64-bit types ...
| * | remove abs64()Andrew Morton2015-11-091-1/+1
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | Switch everything to the new and more capable implementation of abs(). Mainly to give the new abs() a bit of a workout. Cc: Michal Nazarewicz <mina86@mina86.com> Cc: John Stultz <john.stultz@linaro.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge tag 'gfs2-merge-window' of ↵Linus Torvalds2015-11-0910-59/+70
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2 Pull gfs2 updates from Bob Peterson: "Here is a list of patches we've accumulated for GFS2 for the current upstream merge window. There are only six patches this time: 1. A cleanup patch from Andreas to remove the gl_spin #define in favor of its value for the sake of clarity. 2. A fix from Andy Price to mark the inode dirty during fallocate. 3. A fix from Andy Price to set s_mode on mount failures to prevent a stack trace. 4 A patch from me to prevent a kernel BUG() in trans_add_meta/trans_add_data due to uninitialized storage. 5. A patch from me to protecting our freeing of the in-core directory hash table to prevent double-free. 6. A fix for a page/block rounding problem that resulted in a metadata coherency problem when the block size != page size" I've got a lot more patches in various stages of review and testing, but I'm afraid they'll have to wait until the next merge window. So next time we're likely to have a lot more" * tag 'gfs2-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2: GFS2: Fix rgrp end rounding problem for bsize < page size GFS2: Protect freeing directory hash table with i_lock spin_lock gfs2: Remove gl_spin define gfs2: Add missing else in trans_add_meta/data GFS2: Set s_mode before parsing mount options GFS2: fallocate: do not rely on file_update_time to mark the inode dirty
| * GFS2: Fix rgrp end rounding problem for bsize < page sizeBob Peterson2015-11-091-2/+3
| | | | | | | | | | | | | | | | This patch fixes a bug introduced by commit 7005c3e. That patch tries to map a vm range for resource groups, but the calculation breaks down when the block size is less than the page size. Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * GFS2: Protect freeing directory hash table with i_lock spin_lockBob Peterson2015-11-041-1/+6
| | | | | | | | | | | | | | | | | | This patch changes function gfs2_dir_hash_inval so it uses the i_lock spin_lock to protect the in-core hash table, i_hash_cache. This will prevent double-frees due to a race between gfs2_evict_inode and inode invalidation. Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * gfs2: Remove gl_spin defineAndreas Gruenbacher2015-10-296-54/+53
| | | | | | | | | | | | | | | | | | | | Commit e66cf161 replaced the gl_spin spinlock in struct gfs2_glock with a gl_lockref lockref and defined gl_spin as gl_lockref.lock (the spinlock in gl_lockref). Remove that define to make the references to gl_lockref.lock more obvious. Signed-off-by: Andreas Gruenbacher <andreas.gruenbacher@gmail.com> Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * gfs2: Add missing else in trans_add_meta/dataBob Peterson2015-10-011-0/+4
| | | | | | | | | | | | | | | | | | | | This patch fixes a timing window that causes a segfault. The problem is that bd can remain NULL throughout the function and then reference that NULL pointer if the bh->b_private starts out NULL, then someone sets it to non-NULL inside the locking. In that case, bd still needs to be set. Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * GFS2: Set s_mode before parsing mount optionsAndrew Price2015-09-231-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In the generic mount_bdev() function, deactivate_locked_super() is called after the fill_super() call fails, at which point s_mode has been set. kill_block_super() expects this and dumps a warning when FMODE_EXCL is not set in s_mode. In gfs2_mount() we call deactivate_locked_super() on failure of gfs2_mount_args(), at which point s_mode has not yet been set. This causes kill_block_super() to dump a stack trace when gfs2 fails to mount with invalid options. Set s_mode earlier in gfs2_mount() to avoid that. Signed-off-by: Andrew Price <anprice@redhat.com> Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * GFS2: fallocate: do not rely on file_update_time to mark the inode dirtyAndrew Price2015-09-221-1/+1
| | | | | | | | | | | | | | | | | | Previously __gfs2_fallocate() relied on file_update_time() marking the inode dirty, but that's not a safe assumption as that function doesn't dirty the inode in some cases. Mark the inode dirty explicitly. Signed-off-by: Andrew Price <anprice@redhat.com> Signed-off-by: Bob Peterson <rpeterso@redhat.com>
* | Move locks API users to locks_lock_inode_wait()Benjamin Coddington2015-10-221-4/+4
|/ | | | | | | | | Instead of having users check for FL_POSIX or FL_FLOCK to call the correct locks API function, use the check within locks_lock_inode_wait(). This allows for some later cleanup. Signed-off-by: Benjamin Coddington <bcodding@redhat.com> Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
* Merge tag 'gfs2-merge-window' of ↵Linus Torvalds2015-09-1111-285/+212
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2 Pull GFS2 updates from Bob Peterson: "Here is a list of patches we've accumulated for GFS2 for the current upstream merge window. This time we've only got six patches, many of which are very small: - three cleanups from Andreas Gruenbacher, including a nice cleanup of the sequence file code for the sbstats debugfs file. - a patch from Ben Hutchings that changes statistics variables from signed to unsigned. - two patches from me that increase GFS2's glock scalability by switching from a conventional hash table to rhashtable" * tag 'gfs2-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2: gfs2: A minor "sbstats" cleanup gfs2: Fix a typo in a comment gfs2: Make statistics unsigned, suitable for use with do_div() GFS2: Use resizable hash table for glocks GFS2: Move glock superblock pointer to field gl_name gfs2: Simplify the seq file code for "sbstats"
| * gfs2: A minor "sbstats" cleanupAndreas Gruenbacher2015-09-031-7/+6
| | | | | | | | | | | | | | It seems cleaner to avoid the temporary value here. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * gfs2: Fix a typo in a commentAndreas Gruenbacher2015-09-031-1/+1
| | | | | | | | | | Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: Bob Peterson <rpeterso@redhat.com>
| * gfs2: Make statistics unsigned, suitable for use with do_div()Ben Hutchings2015-09-034-24/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | None of these statistics can meaningfully be negative, and the numerator for do_div() must have the type u64. The generic implementation of do_div() used on some 32-bit architectures asserts that, resulting in a compiler error in gfs2_rgrp_congested(). Fixes: 0166b197c2ed ("GFS2: Average in only non-zero round-trip times ...") Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Bob Peterson <rpeterso@redhat.com> Acked-by: Andreas Gruenbacher <agruenba@redhat.com>
| * GFS2: Use resizable hash table for glocksBob Peterson2015-09-032-166/+102
| | | | | | | | | | | | | | | | | | | | This patch changes the glock hash table from a normal hash table to a resizable hash table, which scales better. This also simplifies a lot of code. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Acked-by: Steven Whitehouse <swhiteho@redhat.com>
| * GFS2: Move glock superblock pointer to field gl_nameBob Peterson2015-09-0311-74/+75
| | | | | | | | | | | | | | | | | | | | | | | | | | What uniquely identifies a glock in the glock hash table is not gl_name, but gl_name and its superblock pointer. This patch makes the gl_name field correspond to a unique glock identifier. That will allow us to simplify hashing with a future patch, since the hash algorithm can then take the gl_name and hash its components in one operation. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Acked-by: Steven Whitehouse <swhiteho@redhat.com>
| * gfs2: Simplify the seq file code for "sbstats"Andreas Gruenbacher2015-09-031-20/+11
| | | | | | | | | | | | | | | | Don't use struct gfs2_glock_iter as the helper data structure for iterating through "sbstats"; we are not iterating through glocks here. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: Bob Peterson <rpeterso@redhat.com>
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