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2016-05-18Merge branch 'for-linus' of ↵Linus Torvalds5-197/+53
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull remaining vfs xattr work from Al Viro: "The rest of work.xattr (non-cifs conversions)" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: btrfs: Switch to generic xattr handlers ubifs: Switch to generic xattr handlers jfs: Switch to generic xattr handlers jfs: Clean up xattr name mapping gfs2: Switch to generic xattr handlers ceph: kill __ceph_removexattr() ceph: Switch to generic xattr handlers ceph: Get rid of d_find_alias in ceph_set_acl
2016-05-17Merge branch 'work.preadv2' of ↵Linus Torvalds2-8/+6
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs cleanups from Al Viro: "More cleanups from Christoph" * 'work.preadv2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: nfsd: use RWF_SYNC fs: add RWF_DSYNC aand RWF_SYNC ceph: use generic_write_sync fs: simplify the generic_write_sync prototype fs: add IOCB_SYNC and IOCB_DSYNC direct-io: remove the offset argument to dio_complete direct-io: eliminate the offset argument to ->direct_IO xfs: eliminate the pos variable in xfs_file_dio_aio_write filemap: remove the pos argument to generic_file_direct_write filemap: remove pos variables in generic_file_read_iter
2016-05-17Merge branch 'ovl-fixes' into for-linusAl Viro1-4/+2
Backmerge to resolve a conflict in ovl_lookup_real(); "ovl_lookup_real(): use lookup_one_len_unlocked()" instead, but it was too late in the cycle to rebase.
2016-05-02Merge getxattr prototype change into work.lookupsAl Viro3-5/+7
The rest of work.xattr stuff isn't needed for this branch
2016-05-01ceph: use generic_write_syncChristoph Hellwig1-6/+5
Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-05-01direct-io: eliminate the offset argument to ->direct_IOChristoph Hellwig1-2/+1
Including blkdev_direct_IO and dax_do_io. It has to be ki_pos to actually work, so eliminate the superflous argument. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-04-25libceph: make authorizer destruction independent of ceph_auth_clientIlya Dryomov1-4/+2
Starting the kernel client with cephx disabled and then enabling cephx and restarting userspace daemons can result in a crash: [262671.478162] BUG: unable to handle kernel paging request at ffffebe000000000 [262671.531460] IP: [<ffffffff811cd04a>] kfree+0x5a/0x130 [262671.584334] PGD 0 [262671.635847] Oops: 0000 [#1] SMP [262672.055841] CPU: 22 PID: 2961272 Comm: kworker/22:2 Not tainted 4.2.0-34-generic #39~14.04.1-Ubuntu [262672.162338] Hardware name: Dell Inc. PowerEdge R720/068CDY, BIOS 2.4.3 07/09/2014 [262672.268937] Workqueue: ceph-msgr con_work [libceph] [262672.322290] task: ffff88081c2d0dc0 ti: ffff880149ae8000 task.ti: ffff880149ae8000 [262672.428330] RIP: 0010:[<ffffffff811cd04a>] [<ffffffff811cd04a>] kfree+0x5a/0x130 [262672.535880] RSP: 0018:ffff880149aeba58 EFLAGS: 00010286 [262672.589486] RAX: 000001e000000000 RBX: 0000000000000012 RCX: ffff8807e7461018 [262672.695980] RDX: 000077ff80000000 RSI: ffff88081af2be04 RDI: 0000000000000012 [262672.803668] RBP: ffff880149aeba78 R08: 0000000000000000 R09: 0000000000000000 [262672.912299] R10: ffffebe000000000 R11: ffff880819a60e78 R12: ffff8800aec8df40 [262673.021769] R13: ffffffffc035f70f R14: ffff8807e5b138e0 R15: ffff880da9785840 [262673.131722] FS: 0000000000000000(0000) GS:ffff88081fac0000(0000) knlGS:0000000000000000 [262673.245377] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [262673.303281] CR2: ffffebe000000000 CR3: 0000000001c0d000 CR4: 00000000001406e0 [262673.417556] Stack: [262673.472943] ffff880149aeba88 ffff88081af2be04 ffff8800aec8df40 ffff88081af2be04 [262673.583767] ffff880149aeba98 ffffffffc035f70f ffff880149aebac8 ffff8800aec8df00 [262673.694546] ffff880149aebac8 ffffffffc035c89e ffff8807e5b138e0 ffff8805b047f800 [262673.805230] Call Trace: [262673.859116] [<ffffffffc035f70f>] ceph_x_destroy_authorizer+0x1f/0x50 [libceph] [262673.968705] [<ffffffffc035c89e>] ceph_auth_destroy_authorizer+0x3e/0x60 [libceph] [262674.078852] [<ffffffffc0352805>] put_osd+0x45/0x80 [libceph] [262674.134249] [<ffffffffc035290e>] remove_osd+0xae/0x140 [libceph] [262674.189124] [<ffffffffc0352aa3>] __reset_osd+0x103/0x150 [libceph] [262674.243749] [<ffffffffc0354703>] kick_requests+0x223/0x460 [libceph] [262674.297485] [<ffffffffc03559e2>] ceph_osdc_handle_map+0x282/0x5e0 [libceph] [262674.350813] [<ffffffffc035022e>] dispatch+0x4e/0x720 [libceph] [262674.403312] [<ffffffffc034bd91>] try_read+0x3d1/0x1090 [libceph] [262674.454712] [<ffffffff810ab7c2>] ? dequeue_entity+0x152/0x690 [262674.505096] [<ffffffffc034cb1b>] con_work+0xcb/0x1300 [libceph] [262674.555104] [<ffffffff8108fb3e>] process_one_work+0x14e/0x3d0 [262674.604072] [<ffffffff810901ea>] worker_thread+0x11a/0x470 [262674.652187] [<ffffffff810900d0>] ? rescuer_thread+0x310/0x310 [262674.699022] [<ffffffff810957a2>] kthread+0xd2/0xf0 [262674.744494] [<ffffffff810956d0>] ? kthread_create_on_node+0x1c0/0x1c0 [262674.789543] [<ffffffff817bd81f>] ret_from_fork+0x3f/0x70 [262674.834094] [<ffffffff810956d0>] ? kthread_create_on_node+0x1c0/0x1c0 What happens is the following: (1) new MON session is established (2) old "none" ac is destroyed (3) new "cephx" ac is constructed ... (4) old OSD session (w/ "none" authorizer) is put ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer) osd->o_auth.authorizer in the "none" case is just a bare pointer into ac, which contains a single static copy for all services. By the time we get to (4), "none" ac, freed in (2), is long gone. On top of that, a new vtable installed in (3) points us at ceph_x_destroy_authorizer(), so we end up trying to destroy a "none" authorizer with a "cephx" destructor operating on invalid memory! To fix this, decouple authorizer destruction from ac and do away with a single static "none" authorizer by making a copy for each OSD or MDS session. Authorizers themselves are independent of ac and so there is no reason for destroy_authorizer() to be an ac op. Make it an op on the authorizer itself by turning ceph_authorizer into a real struct. Fixes: http://tracker.ceph.com/issues/15447 Reported-by: Alan Zhang <alan.zhang@linux.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Sage Weil <sage@redhat.com>
2016-04-23ceph: kill __ceph_removexattr()Yan, Zheng1-126/+0
when removing a xattr, generic_removexattr() calls __ceph_setxattr() with NULL value and XATTR_REPLACE flag. __ceph_removexattr() is not used any more. Signed-off-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-04-23ceph: Switch to generic xattr handlersAndreas Gruenbacher4-52/+38
Add a catch-all xattr handler at the end of ceph_xattr_handlers. Check for valid attribute names there, and remove those checks from __ceph_{get,set,remove}xattr instead. No "system.*" xattrs need to be handled by the catch-all handler anymore. The set xattr handler is called with a NULL value to indicate that the attribute should be removed; __ceph_setxattr already handles that case correctly (ceph_set_acl could already calling __ceph_setxattr with a NULL value). Move the check for snapshots from ceph_{set,remove}xattr into __ceph_{set,remove}xattr. With that, ceph_{get,set,remove}xattr can be replaced with the generic iops. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-04-23ceph: Get rid of d_find_alias in ceph_set_aclAndreas Gruenbacher4-33/+29
Create a variant of ceph_setattr that takes an inode instead of a dentry. Change __ceph_setxattr (and also __ceph_removexattr) to take an inode instead of a dentry. Use those in ceph_set_acl so that we no longer need a dentry there. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-04-11->getxattr(): pass dentry and inode as separate argumentsAl Viro2-5/+5
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-04-04mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macrosKirill A. Shutemov8-85/+85
PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time ago with promise that one day it will be possible to implement page cache with bigger chunks than PAGE_SIZE. This promise never materialized. And unlikely will. We have many places where PAGE_CACHE_SIZE assumed to be equal to PAGE_SIZE. And it's constant source of confusion on whether PAGE_CACHE_* or PAGE_* constant should be used in a particular case, especially on the border between fs and mm. Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much breakage to be doable. Let's stop pretending that pages in page cache are special. They are not. The changes are pretty straight-forward: - <foo> << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>; - <foo> >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>; - PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN}; - page_cache_get() -> get_page(); - page_cache_release() -> put_page(); This patch contains automated changes generated with coccinelle using script below. For some reason, coccinelle doesn't patch header files. I've called spatch for them manually. The only adjustment after coccinelle is revert of changes to PAGE_CAHCE_ALIGN definition: we are going to drop it later. There are few places in the code where coccinelle didn't reach. I'll fix them manually in a separate patch. Comments and documentation also will be addressed with the separate patch. virtual patch @@ expression E; @@ - E << (PAGE_CACHE_SHIFT - PAGE_SHIFT) + E @@ expression E; @@ - E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) + E @@ @@ - PAGE_CACHE_SHIFT + PAGE_SHIFT @@ @@ - PAGE_CACHE_SIZE + PAGE_SIZE @@ @@ - PAGE_CACHE_MASK + PAGE_MASK @@ expression E; @@ - PAGE_CACHE_ALIGN(E) + PAGE_ALIGN(E) @@ expression E; @@ - page_cache_get(E) + get_page(E) @@ expression E; @@ - page_cache_release(E) + put_page(E) Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-31posix_acl: Inode acl caching fixesAndreas Gruenbacher1-0/+2
When get_acl() is called for an inode whose ACL is not cached yet, the get_acl inode operation is called to fetch the ACL from the filesystem. The inode operation is responsible for updating the cached acl with set_cached_acl(). This is done without locking at the VFS level, so another task can call set_cached_acl() or forget_cached_acl() before the get_acl inode operation gets to calling set_cached_acl(), and then get_acl's call to set_cached_acl() results in caching an outdate ACL. Prevent this from happening by setting the cached ACL pointer to a task-specific sentinel value before calling the get_acl inode operation. Move the responsibility for updating the cached ACL from the get_acl inode operations to get_acl(). There, only set the cached ACL if the sentinel value hasn't changed. The sentinel values are chosen to have odd values. Likewise, the value of ACL_NOT_CACHED is odd. In contrast, ACL object pointers always have an even value (ACLs are aligned in memory). This allows to distinguish uncached ACLs values from ACL objects. In addition, switch from guarding inode->i_acl and inode->i_default_acl upates by the inode->i_lock spinlock to using xchg() and cmpxchg(). Filesystems that do not want ACLs returned from their get_acl inode operations to be cached must call forget_cached_acl() to prevent the VFS from doing so. (Patch written by Al Viro and Andreas Gruenbacher.) Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-03-25ceph: use kmem_cache_zallocGeliang Tang2-2/+2
Use kmem_cache_zalloc() instead of kmem_cache_alloc() with flag GFP_ZERO. Signed-off-by: Geliang Tang <geliangtang@163.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2016-03-25ceph: use lookup request to revalidate dentryYan, Zheng2-0/+35
If dentry has no lease, ceph_d_revalidate() previously return 0. This causes VFS to invalidate the dentry and create a new dentry for later lookup. Invalidating a dentry also detach any underneath mount points. So mount point inside cephfs can disapear mystically (even the mount point is not modified by other hosts). The fix is using lookup request to revalidate dentry without lease. This can partly solve the mount points disapear issue (as long as the mount point is not modified by other hosts) Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-25ceph: kill ceph_get_dentry_parent_inode()Yan, Zheng2-20/+5
use vfs helper dget_parent() instead Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-25ceph: fix security xattr deadlockYan, Zheng7-10/+123
When security is enabled, security module can call filesystem's getxattr/setxattr callbacks during d_instantiate(). For cephfs, d_instantiate() is usually called by MDS' dispatch thread, while handling MDS reply. If the MDS reply does not include xattrs and corresponding caps, getxattr/setxattr need to send a new request to MDS and waits for the reply. This makes MDS' dispatch sleep, nobody handles later MDS replies. The fix is make sure lookup/atomic_open reply include xattrs and corresponding caps. So getxattr can be handled by cached xattrs. This requires some modification to both MDS and request message. (Client tells MDS what caps it wants; MDS encodes proper caps in the reply) Smack security module may call setxattr during d_instantiate(). Unlike getxattr, we can't force MDS to issue CEPH_CAP_XATTR_EXCL to us. So just make setxattr return error when called by MDS' dispatch thread. Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-25ceph: don't request vxattrs from MDSYan, Zheng1-2/+4
It's uselese because MDS reply does not carry any vxattr. Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-25ceph: fix mounting same fs multiple timesYan, Zheng1-18/+15
Now __ceph_open_session() only accepts closed client. An opened client will tigger BUG_ON(). Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-25ceph: remove unnecessary NULL checkYan, Zheng1-2/+2
If page->mapping is NULL, releasepage() callback does not get called. Remove the unnecessary NULL check to make static code analysis tool happy Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-25ceph: avoid updating directory inode's i_size accidentallyYan, Zheng1-0/+4
Directory inode's i_size is used by readdir cache. Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-25ceph: fix race during filling readdir cacheYan, Zheng1-2/+7
Readdir cache uses page cache to save dentry pointers. When adding dentry pointers to middle of a page, we need to make sure the page already exists. Otherwise the beginning part of the page will be invalid pointers. Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-25ceph: kill ceph_empty_snapcIlya Dryomov4-34/+6
ceph_empty_snapc->num_snaps == 0 at all times. Passing such a snapc to ceph_osdc_alloc_request() (possibly through ceph_osdc_new_request()) is equivalent to passing NULL, as ceph_osdc_alloc_request() uses it only for sizing the request message. Further, in all four cases the subsequent ceph_osdc_build_request() is passed NULL for snapc, meaning that 0 is encoded for seq and num_snaps and making ceph_empty_snapc entirely useless. The two cases where it actually mattered were removed in commits 860560904962 ("ceph: avoid sending unnessesary FLUSHSNAP message") and 23078637e054 ("ceph: fix queuing inode to mdsdir's snaprealm"). Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Yan, Zheng <zyan@redhat.com>
2016-03-25ceph: fix a wrong comparisonAnton Protopopov1-1/+1
A negative value rc compared to the positive value ENOENT in the finish_read() function. Signed-off-by: Anton Protopopov <a.s.protopopov@gmail.com> Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-25ceph: replace CURRENT_TIME by current_fs_time()Deepa Dinamani4-6/+6
CURRENT_TIME macro is not appropriate for filesystems as it doesn't use the right granularity for filesystem timestamps. Use current_fs_time() instead. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-25ceph: scattered page writebackYan, Zheng1-109/+196
This patch makes ceph_writepages_start() try using single OSD request to write all dirty pages within a strip unit. When a nonconsecutive dirty page is found, ceph_writepages_start() tries starting a new write operation to existing OSD request. If it succeeds, it uses the new operation to writeback the dirty page. Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-25ceph: remove useless BUG_ONYan, Zheng1-2/+0
ceph_osdc_start_request() never return -EOLDSNAP Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-25ceph: don't enable rbytes mount option by defaultYan, Zheng2-4/+3
When rbytes mount option is enabled, directory size is recursive size. Recursive size is not updated instantly. This can cause directory size to change between successive stat(1) Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-25ceph: encode ctime in cap messageYan, Zheng1-4/+7
Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-03-25libceph: revamp subs code, switch to SUBSCRIBE2 protocolIlya Dryomov2-2/+3
It is currently hard-coded in the mon_client that mdsmap and monmap subs are continuous, while osdmap sub is always "onetime". To better handle full clusters/pools in the osd_client, we need to be able to issue continuous osdmap subs. Revamp subs code to allow us to specify for each sub whether it should be continuous or not. Although not strictly required for the above, switch to SUBSCRIBE2 protocol while at it, eliminating the ambiguity between a request for "every map since X" and a request for "just the latest" when we don't have a map yet (i.e. have epoch 0). SUBSCRIBE2 feature bit is now required - it's been supported since pre-argonaut (2010). Move "got mdsmap" call to the end of ceph_mdsc_handle_map() - calling in before we validate the epoch and successfully install the new map can mess up mon_client sub state. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2016-03-19Merge branch 'for-linus' of ↵Linus Torvalds1-16/+5
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs updates from Al Viro: - Preparations of parallel lookups (the remaining main obstacle is the need to move security_d_instantiate(); once that becomes safe, the rest will be a matter of rather short series local to fs/*.c - preadv2/pwritev2 series from Christoph - assorted fixes * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (32 commits) splice: handle zero nr_pages in splice_to_pipe() vfs: show_vfsstat: do not ignore errors from show_devname method dcache.c: new helper: __d_add() don't bother with __d_instantiate(dentry, NULL) untangle fsnotify_d_instantiate() a bit uninline d_add() replace d_add_unique() with saner primitive quota: use lookup_one_len_unlocked() cifs_get_root(): use lookup_one_len_unlocked() nfs_lookup: don't bother with d_instantiate(dentry, NULL) kill dentry_unhash() ceph_fill_trace(): don't bother with d_instantiate(dn, NULL) autofs4: don't bother with d_instantiate(dentry, NULL) in ->lookup() configfs: move d_rehash() into configfs_create() for regular files ceph: don't bother with d_rehash() in splice_dentry() namei: teach lookup_slow() to skip revalidate namei: massage lookup_slow() to be usable by lookup_one_len_unlocked() lookup_one_len_unlocked(): use lookup_dcache() namei: simplify invalidation logics in lookup_dcache() namei: change calling conventions for lookup_{fast,slow} and follow_managed() ...
2016-03-14ceph_fill_trace(): don't bother with d_instantiate(dn, NULL)Al Viro1-3/+1
... and use d_add(dn, NULL) in case we need to hash a negative unhashed rather than using d_rehash() directly. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-03-14ceph: don't bother with d_rehash() in splice_dentry()Al Viro1-13/+4
d_splice_alias() guarantees that it'll be always hashed Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-03-04ceph: initial CEPH_FEATURE_FS_FILE_LAYOUT_V2 supportYan, Zheng6-3/+48
Add support for the format change of MClientReply/MclientCaps. Also add code that denies access to inodes with pool_ns layouts. Signed-off-by: Yan, Zheng <zyan@redhat.com> Reviewed-by: Sage Weil <sage@redhat.com>
2016-02-04ceph: fix snap context leak in error pathYan, Zheng1-1/+1
Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-02-04ceph: checking for IS_ERR instead of NULLDan Carpenter1-2/+2
ceph_osdc_alloc_request() returns NULL on error, it never returns error pointers. Fixes: 5be0389dac66 ('ceph: re-send AIO write request when getting -EOLDSNAP error') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2016-01-24Merge branch 'for-linus' of ↵Linus Torvalds4-150/+389
git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client Pull Ceph updates from Sage Weil: "The two main changes are aio support in CephFS, and a series that fixes several issues in the authentication key timeout/renewal code. On top of that are a variety of cleanups and minor bug fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: libceph: remove outdated comment libceph: kill off ceph_x_ticket_handler::validity libceph: invalidate AUTH in addition to a service ticket libceph: fix authorizer invalidation, take 2 libceph: clear messenger auth_retry flag if we fault libceph: fix ceph_msg_revoke() libceph: use list_for_each_entry_safe ceph: use i_size_{read,write} to get/set i_size ceph: re-send AIO write request when getting -EOLDSNAP error ceph: Asynchronous IO support ceph: Avoid to propagate the invalid page point ceph: fix double page_unlock() in page_mkwrite() rbd: delete an unnecessary check before rbd_dev_destroy() libceph: use list_next_entry instead of list_entry_next ceph: ceph_frag_contains_value can be boolean ceph: remove unused functions in ceph_frag.h
2016-01-22wrappers for ->i_mutex accessAl Viro5-17/+17
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>
2016-01-21ceph: use i_size_{read,write} to get/set i_sizeYan, Zheng4-26/+25
Cap message from MDS can update i_size. In that case, we don't hold i_mutex. So it's unsafe to directly access inode->i_size while holding i_mutex. Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-01-21ceph: re-send AIO write request when getting -EOLDSNAP errorYan, Zheng1-4/+86
When receiving -EOLDSNAP from OSD, we need to re-send corresponding write request. Due to locking issue, we can send new request inside another OSD request's complete callback. So we use worker to re-send request for AIO write. Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-01-21ceph: Asynchronous IO supportYan, Zheng1-119/+278
The basic idea of AIO support is simple, just call kiocb::ki_complete() in OSD request's complete callback. But there are several special cases. when IO span multiple objects, we need to wait until all OSD requests are complete, then call kiocb::ki_complete(). Error handling in this case is tricky too. For simplify, AIO both span multiple objects and extends i_size are not allowed. Another special case is check EOF for reading (other client can write to the file and extend i_size concurrently). For simplify, the direct-IO/AIO code path does do the check, fallback to normal syn read instead. Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-01-21ceph: Avoid to propagate the invalid page pointMinfei Huang1-1/+0
The variant pagep will still get the invalid page point, although ceph fails in function ceph_update_writeable_page. To fix this issue, Assigne the page to pagep until there is no failure in function ceph_update_writeable_page. Signed-off-by: Minfei Huang <mnfhuang@gmail.com> Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-01-21ceph: fix double page_unlock() in page_mkwrite()Yan, Zheng1-4/+4
ceph_update_writeable_page() unlocks the page on errors, so page_mkwrite() should not unlock the page again. Signed-off-by: Yan, Zheng <zyan@redhat.com>
2016-01-14kmemcg: account certain kmem allocations to memcgVladimir Davydov1-2/+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>
2016-01-11Merge branch 'work.xattr' of ↵Linus Torvalds1-8/+8
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
2015-12-08replace ->follow_link() with new method that could stay in RCU modeAl Viro1-1/+1
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>
2015-12-06posix acls: Remove duplicate xattr name definitionsAndreas Gruenbacher1-8/+8
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>
2015-11-13Merge branch 'for-linus' of ↵Linus Torvalds7-66/+161
git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client Pull Ceph updates from Sage Weil: "There are several patches from Ilya fixing RBD allocation lifecycle issues, a series adding a nocephx_sign_messages option (and associated bug fixes/cleanups), several patches from Zheng improving the (directory) fsync behavior, a big improvement in IO for direct-io requests when striping is enabled from Caifeng, and several other small fixes and cleanups" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: libceph: clear msg->con in ceph_msg_release() only libceph: add nocephx_sign_messages option libceph: stop duplicating client fields in messenger libceph: drop authorizer check from cephx msg signing routines libceph: msg signing callouts don't need con argument libceph: evaluate osd_req_op_data() arguments only once ceph: make fsync() wait unsafe requests that created/modified inode ceph: add request to i_unsafe_dirops when getting unsafe reply libceph: introduce ceph_x_authorizer_cleanup() ceph: don't invalidate page cache when inode is no longer used rbd: remove duplicate calls to rbd_dev_mapping_clear() rbd: set device_type::release instead of device::release rbd: don't free rbd_dev outside of the release callback rbd: return -ENOMEM instead of pool id if rbd_dev_create() fails libceph: use local variable cursor instead of &msg->cursor libceph: remove con argument in handle_reply() ceph: combine as many iovec as possile into one OSD request ceph: fix message length computation ceph: fix a comment typo rbd: drop null test before destroy functions
2015-11-06mm, fs: introduce mapping_gfp_constraint()Michal Hocko1-3/+4
There are many places which use mapping_gfp_mask to restrict a more generic gfp mask which would be used for allocations which are not directly related to the page cache but they are performed in the same context. Let's introduce a helper function which makes the restriction explicit and easier to track. This patch doesn't introduce any functional changes. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Michal Hocko <mhocko@suse.com> Suggested-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-11-02libceph: msg signing callouts don't need con argumentIlya Dryomov1-6/+8
We can use msg->con instead - at the point we sign an outgoing message or check the signature on the incoming one, msg->con is always set. We wouldn't know how to sign a message without an associated session (i.e. msg->con == NULL) and being able to sign a message using an explicitly provided authorizer is of no use. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
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