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2014-05-07f2fs: add a tracepoint for f2fs_read_data_pageChao Yu1-0/+2
This patch adds a tracepoint for f2fs_read_data_page to trace when page is readed by user. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: add a tracepoint for f2fs_write_{meta,node,data}_pagesChao Yu3-0/+6
This patch adds a tracepoint for f2fs_write_{meta,node,data}_pages to trace when pages are fsyncing/flushing. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: add a tracepoint for f2fs_write_{meta,node,data}_pageChao Yu3-0/+6
This patch adds a tracepoint for f2fs_write_{meta,node,data}_page to trace when page is writting out. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: add a tracepoint for f2fs_write_endChao Yu1-0/+2
This patch adds a tracepoint for f2fs_write_end to trace write op of user. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: add a tracepoint for f2fs_write_beginChao Yu1-0/+2
This patch adds a tracepoint for f2fs_write_begin to trace write op of user. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: fix checkpatch warningZhang Zhen1-2/+2
fix the following checkpatch warning: WARNING: do {} while (0) macros should not be semicolon terminated Signed-off-by: Zhang Zhen <zhenzhang.zhang@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: deactivate inode page if the inode is evictedJaegeuk Kim1-0/+1
If the inode page is clean during its inode eviction, it'd better drop the page to reduce further memory pressure. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: decrease the lock granularity during write_beginJaegeuk Kim1-1/+13
This patch reduces the lock granularity during write_begin. When the system is under memory pressure, it would be better to reduce the locking time for the data pages. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: no need to wait on page writebck to meta pagesJaegeuk Kim1-2/+2
This patch removes grab_cache_page_write_begin for meta pages. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: avoid grab_cache_page_write_begin for data pagesJaegeuk Kim2-3/+4
We don't need to wait on page writeback for these cases. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: split grab_cache_page and wait_on_page_writeback for node pagesJaegeuk Kim5-5/+16
This patch splits grab_cache_page_write_begin into grab_cache_page and wait_on_page_writeback for node pages. This patch intends to enhance the latency to get node pages by alleviating unnecessary wait_on_page_writeback. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: fix to truncate inline data in inode page when setattrChao Yu3-0/+22
Previous we do not truncate inline data in inode page when setattr, so following case could still read the inline data which has already truncated: 1.write inline data 2.ftruncate size to 0 3.ftruncate size to max inline data size 4.read from offset 0 This patch introduces truncate_inline_data() to fix this problem. change log from v1: o fix a bug and do not truncate first page data after truncate inline data. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: readahead multi pages of directory for performanceChao Yu2-0/+8
We have no so such readahead mechanism in ->iterate() path as the one in ->read() path, it cause low performance when we read large directory. This patch add readahead in f2fs_readdir() for better performance. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: set errno when f2fs_iget failed in recover_dentryChao Yu1-1/+2
We should set the error number correctly when we fail in recover_dentry(), so the recover flow could stop for the reason as error number shows instead of continuing. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: consider fallocated space for SEEK_DATAJaegeuk Kim1-4/+41
If an amount of data are allocated though fallocate and user writes a couple of data among the space, f2fs should return the data offset made by user when SEEK_DATA is requested. For example, (N: NEW_ADDR by fallocate, X: NEW_ADDR by user) 1) fallocate 0 ~ 10MB f -> N N N N N N N N N N N N ... N 2) write 4KB at 5MB offset f -> N N N N N X N N N N N N ... N 3) SEEK_DATA from 0 should return 5MB offset So, this patch adds a routine to search the first dirty page to handle that. Then, the SEEK_DATA flow skips NEW_ADDR offsets until any dirty page is found. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: return i_size if the hole is outside of i_sizeJaegeuk Kim1-2/+2
When SEEK_HOLE is requeted, it should return i_size if the hole position is found outside of i_size. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: introduce f2fs_seek_block to support SEEK_{DATA, HOLE} in llseekChao Yu2-1/+97
In This patch we introduce f2fs_seek_block to support SEEK_{DATA,HOLE} of lseek(2). change log from v1: o fix bug when lseek from middle of page and fix wrong calculation of PGOFS_OF_NEXT_DNODE macro. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: introduce help function {create,destroy}_flush_cmd_controlGu Zheng3-47/+43
Introduce help function {create,destroy}_flush_cmd_control to clean up the create/destory flush merge operation. Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: introduce struct flush_cmd_control to wrap the flush_merge fieldsGu Zheng3-54/+78
Split the flush_merge fields from sm_i, and use the new struct flush_cmd_control to wrap it, so that we can igonre these fileds if flush_merge is disable, and it alse can the structs more neat. Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: introduce help macro ADDRS_PER_PAGE()Chao Yu3-12/+4
Introduce help macro ADDRS_PER_PAGE() to get the number of address pointers in direct node or inode. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: submit bio at the reclaim pathJaegeuk Kim1-0/+2
If f2fs_write_data_page is called through the reclaim path, we should submit the bio right away. This patch resolves the following issue that Marc Dietrich reported. "It took me a while to bisect a problem which causes my ARM (tegra2) netbook to frequently stall for 5-10 seconds when I enable EXA acceleration (opentegra experimental ddx)." And this patch fixes that. Reported-by: Marc Dietrich <marvin24@gmx.de> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: return errors right after checking themJaegeuk Kim1-1/+9
This patch adds two error conditions early in the setxattr operations. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: pass flags field to setxattr functionsJaegeuk Kim3-9/+10
This patch passes the "flags" field to the low level setxattr functions to use XATTR_REPLACE in the following patches. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: clean up long variable namesJaegeuk Kim2-45/+47
This patch includes simple clean-ups to reduce unnecessary long variable names. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: handle inline data independently in f2fs_bmapChao Yu1-0/+5
We'd better handle inline data case independently in f2fs_bmap(). It can reduce our handling time in f2fs_bmap(). Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: adjust free mem size to flush dentry blocksJaegeuk Kim4-21/+32
If so many dirty dentry blocks are cached, not reached to the flush condition, we should fall into livelock in balance_dirty_pages. So, let's consider the mem size for the condition. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: avoid BUG_ON when mouting corrupted image having garbage blocksJaegeuk Kim1-1/+5
If the disk has some garbage blocks, F2FS is able to face with BUG_ON when recovering direct node blocks. This patch detects the error case and avoids that prior to reaching BUG_ON. Alexey Khoroshilov addressed the potential security issues as follows. "An ability to trigger a BUG_ON assert by mounting a crafted image is usually considered as a local denial of service [1-3]. As far as I understand, the reason is that some kernel data may become inconsistent that can lead to further problems. [1] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-3353 [2] http://www.openwall.com/lists/oss-security/2011/06/24/4 [3] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2928 etc." Reported-by: Andrey Tsyvarev <tsyvarev@ispras.ru> Cc: Alexey Khoroshilov <khoroshilov@ispras.ru> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: add available_nids to fix handling max_nid correctlyJaegeuk Kim2-2/+5
This patch introduces available_nids for alloc_nids() and fixes max_nid for build_free_nids() and scan_nat_pages(). Signed-off-by: Chao Yu <chao2.yu@samsung.com> Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: add static to get_max_meta_blksFabian Frederick1-1/+1
inline get_max_meta_blks is only used in checkpoint.c Use standard static inline format. Cc: Jaegeuk Kim <jaegeuk.kim@samsung.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: introduce raw_nat_from_node_info() to simplfy codesChao Yu2-12/+11
This patch introduce raw_nat_from_node_info() to simplfy some codes, and also use exist function node_info_from_raw_nat() to do the same job. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: add the flush_merge handle in the remount flowGu Zheng3-3/+45
Add the *remount* handle of flush_merge option, so that the users can enable flush_merge in the runtime, such as the underlying device handles the cache_flush command relatively slowly. Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: atomically set inode->i_flags in f2fs_set_inode_flags()Zhang Zhen1-8/+9
Use set_mask_bits() to atomically set i_flags instead of clearing out the S_IMMUTABLE, S_APPEND, etc. flags and then setting them from the FS_IMMUTABLE_FL, FS_APPEND_FL, etc. flags, since this opens up a race where an immutable file has the immutable flag cleared for a brief window of time. Signed-off-by: Zhang Zhen <zhenzhang.zhang@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: make recover_inline_xattr() staticJingoo Han1-1/+1
Make recover_inline_xattr() static, because this function is used only in this file. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: remove costly dirty_dir_inode operationsJaegeuk Kim3-48/+25
This patch removes list opeations in handling dirty dir inodes. Previously, F2FS traverses whole the list of dirty dir inodes to check whether there is an existing inode or not, resulting in heavy CPU overheads. So this patch removes such the traverse operations by adding FI_DIRTY_DIR to indicate the inode lies on the list or not. Through this simple flag, we can remove redundant operations gracefully. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: fix to unlock f2fs_lock at the omitted error caseJaegeuk Kim1-6/+7
If it occurs an error, we should call f2fs_unlock_op. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: call redirty_page_for_writepageJaegeuk Kim3-15/+5
This patch replace some general codes with redirty_page_for_writepage, which can be enabled after consideration on additional procedure like counting dirty pages appropriately. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: avoid to conduct roll-forward due to the remained garbage blocksJaegeuk Kim3-2/+22
The f2fs always scans the next chain of direct node blocks. But some garbage blocks are able to be remained due to no discard support or SSR triggers. This occasionally wreaks recovering wrong inodes that were used or BUG_ONs due to reallocating node ids as follows. When mount this f2fs image: http://linuxtesting.org/downloads/f2fs_fault_image.zip BUG_ON is triggered in f2fs driver (messages below are generated on kernel 3.13.2; for other kernels output is similar): kernel BUG at fs/f2fs/node.c:215! Call Trace: [<ffffffffa032ebad>] recover_inode_page+0x1fd/0x3e0 [f2fs] [<ffffffff811446e7>] ? __lock_page+0x67/0x70 [<ffffffff81089990>] ? autoremove_wake_function+0x50/0x50 [<ffffffffa0337788>] recover_fsync_data+0x1398/0x15d0 [f2fs] [<ffffffff812b9e5c>] ? selinux_d_instantiate+0x1c/0x20 [<ffffffff811cb20b>] ? d_instantiate+0x5b/0x80 [<ffffffffa0321044>] f2fs_fill_super+0xb04/0xbf0 [f2fs] [<ffffffff811b861e>] ? mount_bdev+0x7e/0x210 [<ffffffff811b8769>] mount_bdev+0x1c9/0x210 [<ffffffffa0320540>] ? validate_superblock+0x210/0x210 [f2fs] [<ffffffffa031cf8d>] f2fs_mount+0x1d/0x30 [f2fs] [<ffffffff811b9497>] mount_fs+0x47/0x1c0 [<ffffffff81166e00>] ? __alloc_percpu+0x10/0x20 [<ffffffff811d4032>] vfs_kern_mount+0x72/0x110 [<ffffffff811d6763>] do_mount+0x493/0x910 [<ffffffff811615cb>] ? strndup_user+0x5b/0x80 [<ffffffff811d6c70>] SyS_mount+0x90/0xe0 [<ffffffff8166f8d9>] system_call_fastpath+0x16/0x1b Found by Linux File System Verification project (linuxtesting.org). Reported-by: Andrey Tsyvarev <tsyvarev@ispras.ru> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: enable flush_merge only in f2fs is not read-onlyGu Zheng2-4/+3
Enable flush_merge only in f2fs is not read-only, so does the mount option show. Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: use __GFP_ZERO to avoid appending set-NULLGu Zheng1-3/+1
Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: put the bio when issue_flush completedGu Zheng1-0/+1
Put the bio when the flush cmd issued, it also can fix the following kmemleak: unreferenced object 0xffff8800270c73c0 (size 200): comm "f2fs_flush-7:0", pid 27161, jiffies 4312127988 (age 988.503s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 40 07 81 19 01 88 ff ff ........@....... 01 00 00 00 00 00 00 f0 11 14 00 00 00 00 00 00 ................ backtrace: [<ffffffff81559866>] kmemleak_alloc+0x72/0x96 [<ffffffff81156f7e>] slab_post_alloc_hook+0x28/0x2a [<ffffffff811595b1>] kmem_cache_alloc+0xec/0x157 [<ffffffff8111924d>] mempool_alloc_slab+0x15/0x17 [<ffffffff81119513>] mempool_alloc+0x71/0x138 [<ffffffff81193548>] bio_alloc_bioset+0x93/0x18c [<ffffffffa040f857>] issue_flush_thread+0x8d/0x145 [f2fs] [<ffffffff8107ac16>] kthread+0xba/0xc2 [<ffffffff81571b2c>] ret_from_fork+0x7c/0xb0 [<ffffffffffffffff>] 0xffffffffffffffff Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07Merge branch 'akpm' (incoming from Andrew)Linus Torvalds4-4/+9
Merge misc fixes from Andrew Morton: "13 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: agp: info leak in agpioc_info_wrap() fs/affs/super.c: bugfix / double free fanotify: fix -EOVERFLOW with large files on 64-bit slub: use sysfs'es release mechanism for kmem_cache revert "mm: vmscan: do not swap anon pages just because free+file is low" autofs: fix lockref lookup mm: filemap: update find_get_pages_tag() to deal with shadow entries mm/compaction: make isolate_freepages start at pageblock boundary MAINTAINERS: zswap/zbud: change maintainer email address mm/page-writeback.c: fix divide by zero in pos_ratio_polynom hugetlb: ensure hugepage access is denied if hugepages are not supported slub: fix memcg_propagate_slab_attrs drivers/rtc/rtc-pcf8523.c: fix month definition
2014-05-07fs/affs/super.c: bugfix / double freeFabian Frederick1-2/+0
Commit 842a859db26b ("affs: use ->kill_sb() to simplify ->put_super() and failure exits of ->mount()") adds .kill_sb which frees sbi but doesn't remove sbi free in case of parse_options error causing double free+random crash. Signed-off-by: Fabian Frederick <fabf@skynet.be> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: <stable@vger.kernel.org> [3.14.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-05-07fanotify: fix -EOVERFLOW with large files on 64-bitWill Woods1-0/+2
On 64-bit systems, O_LARGEFILE is automatically added to flags inside the open() syscall (also openat(), blkdev_open(), etc). Userspace therefore defines O_LARGEFILE to be 0 - you can use it, but it's a no-op. Everything should be O_LARGEFILE by default. But: when fanotify does create_fd() it uses dentry_open(), which skips all that. And userspace can't set O_LARGEFILE in fanotify_init() because it's defined to 0. So if fanotify gets an event regarding a large file, the read() will just fail with -EOVERFLOW. This patch adds O_LARGEFILE to fanotify_init()'s event_f_flags on 64-bit systems, using the same test as open()/openat()/etc. Addresses https://bugzilla.redhat.com/show_bug.cgi?id=696821 Signed-off-by: Will Woods <wwoods@redhat.com> Acked-by: Eric Paris <eparis@redhat.com> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-05-07autofs: fix lockref lookupIan Kent1-2/+2
autofs needs to be able to see private data dentry flags for its dentrys that are being created but not yet hashed and for its dentrys that have been rmdir()ed but not yet freed. It needs to do this so it can block processes in these states until a status has been returned to indicate the given operation is complete. It does this by keeping two lists, active and expring, of dentrys in this state and uses ->d_release() to keep them stable while it checks the reference count to determine if they should be used. But with the recent lockref changes dentrys being freed sometimes don't transition to a reference count of 0 before being freed so autofs can occassionally use a dentry that is invalid which can lead to a panic. Signed-off-by: Ian Kent <raven@themaw.net> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-05-07hugetlb: ensure hugepage access is denied if hugepages are not supportedNishanth Aravamudan1-0/+5
Currently, I am seeing the following when I `mount -t hugetlbfs /none /dev/hugetlbfs`, and then simply do a `ls /dev/hugetlbfs`. I think it's related to the fact that hugetlbfs is properly not correctly setting itself up in this state?: Unable to handle kernel paging request for data at address 0x00000031 Faulting instruction address: 0xc000000000245710 Oops: Kernel access of bad area, sig: 11 [#1] SMP NR_CPUS=2048 NUMA pSeries .... In KVM guests on Power, in a guest not backed by hugepages, we see the following: AnonHugePages: 0 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 64 kB HPAGE_SHIFT == 0 in this configuration, which indicates that hugepages are not supported at boot-time, but this is only checked in hugetlb_init(). Extract the check to a helper function, and use it in a few relevant places. This does make hugetlbfs not supported (not registered at all) in this environment. I believe this is fine, as there are no valid hugepages and that won't change at runtime. [akpm@linux-foundation.org: use pr_info(), per Mel] [akpm@linux-foundation.org: fix build when HPAGE_SHIFT is undefined] Signed-off-by: Nishanth Aravamudan <nacc@linux.vnet.ibm.com> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Mel Gorman <mgorman@suse.de> Cc: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-05-06Merge branch 'for-linus' of ↵Linus Torvalds3-219/+111
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs fixes from Al Viro: "dcache fixes + kvfree() (uninlined, exported by mm/util.c) + posix_acl bugfix from hch" The dcache fixes are for a subtle LRU list corruption bug reported by Miklos Szeredi, where people inside IBM saw list corruptions with the LTP/host01 test. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: nick kvfree() from apparmor posix_acl: handle NULL ACL in posix_acl_equiv_mode dcache: don't need rcu in shrink_dentry_list() more graceful recovery in umount_collect() don't remove from shrink list in select_collect() dentry_kill(): don't try to remove from shrink list expand the call of dentry_lru_del() in dentry_kill() new helper: dentry_free() fold try_prune_one_dentry() fold d_kill() and d_free() fix races between __d_instantiate() and checks of dentry flags
2014-05-06posix_acl: handle NULL ACL in posix_acl_equiv_modeChristoph Hellwig1-0/+6
Various filesystems don't bother checking for a NULL ACL in posix_acl_equiv_mode, and thus can dereference a NULL pointer when it gets passed one. This usually happens from the NFS server, as the ACL tools never pass a NULL ACL, but instead of one representing the mode bits. Instead of adding boilerplat to all filesystems put this check into one place, which will allow us to remove the check from other filesystems as well later on. Signed-off-by: Christoph Hellwig <hch@lst.de> Reported-by: Ben Greear <greearb@candelatech.com> Reported-by: Marco Munderloh <munderl@tnt.uni-hannover.de>, Cc: Chuck Lever <chuck.lever@oracle.com> Cc: stable@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-06Merge branch 'for-linus' of ↵Linus Torvalds5-86/+172
git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse Pull fuse fixes from Miklos Szeredi: "This adds ctime update in the new cached writeback mode and also fixes/simplifies the mtime update handling. Support for rename flags (aka renameat2) is also added to the userspace API" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse: fuse: add renameat2 support fuse: clear MS_I_VERSION fuse: clear FUSE_I_CTIME_DIRTY flag on setattr fuse: trust kernel i_ctime only fuse: remove .update_time fuse: allow ctime flushing to userspace fuse: fuse: add time_gran to INIT_OUT fuse: add .write_inode fuse: clean up fsync fuse: fuse: fallocate: use file_update_time() fuse: update mtime on open(O_TRUNC) in atomic_o_trunc mode fuse: update mtime on truncate(2) fuse: do not use uninitialized i_mode fuse: fix mtime update error in fsync fuse: check fallocate mode fuse: add __exit to fuse_ctl_cleanup
2014-05-06Merge branch 'for-linus' of ↵Linus Torvalds6-72/+39
git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client Pull Ceph fixes from Sage Weil: "First, there is a critical fix for the new primary-affinity function that went into -rc1. The second batch of patches from Zheng fix a range of problems with directory fragmentation, readdir, and a few odds and ends for cephfs" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: ceph: reserve caps for file layout/lock MDS requests ceph: avoid releasing caps that are being used ceph: clear directory's completeness when creating file libceph: fix non-default values check in apply_primary_affinity() ceph: use fpos_cmp() to compare dentry positions ceph: check directory's completeness before emitting directory entry
2014-05-05UBIFS: fix remount error pathArtem Bityutskiy1-1/+1
Dan's "smatch" checker found out that there was a bug in the error path of the 'ubifs_remount_rw()' function. Instead of jumping to the "out" label which cleans-things up, we just returned. This patch fixes the problem. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
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