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2018-08-25Merge tag 'kbuild-v4.19-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull more Kbuild updates from Masahiro Yamada: - add build_{menu,n,g,x}config targets for compile-testing Kconfig - fix and improve recursive dependency detection in Kconfig - fix parallel building of menuconfig/nconfig - fix syntax error in clang-version.sh - suppress distracting log from syncconfig - remove obsolete "rpm" target - remove VMLINUX_SYMBOL(_STR) macro entirely - fix microblaze build with CONFIG_DYNAMIC_FTRACE - move compiler test for dead code/data elimination to Kconfig - rename well-known LDFLAGS variable to KBUILD_LDFLAGS - misc fixes and cleanups * tag 'kbuild-v4.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kbuild: rename LDFLAGS to KBUILD_LDFLAGS kbuild: pass LDFLAGS to recordmcount.pl kbuild: test dead code/data elimination support in Kconfig initramfs: move gen_initramfs_list.sh from scripts/ to usr/ vmlinux.lds.h: remove stale <linux/export.h> include export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR() Coccinelle: remove pci_alloc_consistent semantic to detect in zalloc-simple.cocci kbuild: make sorting initramfs contents independent of locale kbuild: remove "rpm" target, which is alias of "rpm-pkg" kbuild: Fix LOADLIBES rename in Documentation/kbuild/makefiles.txt kconfig: suppress "configuration written to .config" for syncconfig kconfig: fix "Can't open ..." in parallel build kbuild: Add a space after `!` to prevent parsing as file pattern scripts: modpost: check memory allocation results kconfig: improve the recursive dependency report kconfig: report recursive dependency involving 'imply' kconfig: error out when seeing recursive dependency kconfig: add build-only configurator targets scripts/dtc: consolidate include path options in Makefile
2018-08-22Merge tag 'f2fs-for-4.19' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs Pull f2fs updates from Jaegeuk Kim: "In this round, we've tuned f2fs to improve general performance by serializing block allocation and enhancing discard flows like fstrim which avoids user IO contention. And we've added fsync_mode=nobarrier which gives an option to user where it skips issuing cache_flush commands to underlying flash storage. And there are many bug fixes related to fuzzed images, revoked atomic writes, quota ops, and minor direct IO. Enhancements: - add fsync_mode=nobarrier which bypasses cache_flush command - enhance the discarding flow which avoids user IOs and issues in LBA order - readahead some encrypted blocks during GC - enable in-memory inode checksum to verify the blocks if F2FS_CHECK_FS is set - enhance nat_bits behavior - set -o discard by default - set REQ_RAHEAD to bio in ->readpages Bug fixes: - fix a corner case to corrupt atomic_writes revoking flow - revisit i_gc_rwsem to fix race conditions - fix some dio behaviors captured by xfstests - correct handling errors given by quota-related failures - add many sanity check flows to avoid fuzz test failures - add more error number propagation to their callers - fix several corner cases to continue fault injection w/ shutdown loop" * tag 'f2fs-for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (89 commits) f2fs: readahead encrypted block during GC f2fs: avoid fi->i_gc_rwsem[WRITE] lock in f2fs_gc f2fs: fix performance issue observed with multi-thread sequential read f2fs: fix to skip verifying block address for non-regular inode f2fs: rework fault injection handling to avoid a warning f2fs: support fault_type mount option f2fs: fix to return success when trimming meta area f2fs: fix use-after-free of dicard command entry f2fs: support discard submission error injection f2fs: split discard command in prior to block layer f2fs: wake up gc thread immediately when gc_urgent is set f2fs: fix incorrect range->len in f2fs_trim_fs() f2fs: refresh recent accessed nat entry in lru list f2fs: fix avoid race between truncate and background GC f2fs: avoid race between zero_range and background GC f2fs: fix to do sanity check with block address in main area v2 f2fs: fix to do sanity check with inline flags f2fs: fix to reset i_gc_failures correctly f2fs: fix invalid memory access f2fs: fix to avoid broken of dnode block list ...
2018-08-22Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge more updates from Andrew Morton: - the rest of MM - procfs updates - various misc things - more y2038 fixes - get_maintainer updates - lib/ updates - checkpatch updates - various epoll updates - autofs updates - hfsplus - some reiserfs work - fatfs updates - signal.c cleanups - ipc/ updates * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (166 commits) ipc/util.c: update return value of ipc_getref from int to bool ipc/util.c: further variable name cleanups ipc: simplify ipc initialization ipc: get rid of ids->tables_initialized hack lib/rhashtable: guarantee initial hashtable allocation lib/rhashtable: simplify bucket_table_alloc() ipc: drop ipc_lock() ipc/util.c: correct comment in ipc_obtain_object_check ipc: rename ipcctl_pre_down_nolock() ipc/util.c: use ipc_rcu_putref() for failues in ipc_addid() ipc: reorganize initialization of kern_ipc_perm.seq ipc: compute kern_ipc_perm.id under the ipc lock init/Kconfig: remove EXPERT from CHECKPOINT_RESTORE fs/sysv/inode.c: use ktime_get_real_seconds() for superblock stamp adfs: use timespec64 for time conversion kernel/sysctl.c: fix typos in comments drivers/rapidio/devices/rio_mport_cdev.c: remove redundant pointer md fork: don't copy inconsistent signal handler state to child signal: make get_signal() return bool signal: make sigkill_pending() return bool ...
2018-08-22/proc/meminfo: add percpu populated pages countDennis Zhou (Facebook)
Currently, percpu memory only exposes allocation and utilization information via debugfs. This more or less is only really useful for understanding the fragmentation and allocation information at a per-chunk level with a few global counters. This is also gated behind a config. BPF and cgroup, for example, have seen an increase in use causing increased use of percpu memory. Let's make it easier for someone to identify how much memory is being used. This patch adds the "Percpu" stat to meminfo to more easily look up how much percpu memory is in use. This number includes the cost for all allocated backing pages and not just insight at the per a unit, per chunk level. Metadata is excluded. I think excluding metadata is fair because the backing memory scales with the numbere of cpus and can quickly outweigh the metadata. It also makes this calculation light. Link: http://lkml.kernel.org/r/20180807184723.74919-1-dennisszhou@gmail.com Signed-off-by: Dennis Zhou <dennisszhou@gmail.com> Acked-by: Tejun Heo <tj@kernel.org> Acked-by: Roman Gushchin <guro@fb.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: David Rientjes <rientjes@google.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Christoph Lameter <cl@linux.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-08-22initramfs: move gen_initramfs_list.sh from scripts/ to usr/Masahiro Yamada
scripts/gen_initramfs_list.sh is only invoked from usr/Makefile. Move it so that all tools to create initramfs are self-contained in the usr/ directory. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-08-21Merge tag 'ovl-update-4.19' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs Pull overlayfs updates from Miklos Szeredi: "This contains two new features: - Stack file operations: this allows removal of several hacks from the VFS, proper interaction of read-only open files with copy-up, possibility to implement fs modifying ioctls properly, and others. - Metadata only copy-up: when file is on lower layer and only metadata is modified (except size) then only copy up the metadata and continue to use the data from the lower file" * tag 'ovl-update-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs: (66 commits) ovl: Enable metadata only feature ovl: Do not do metacopy only for ioctl modifying file attr ovl: Do not do metadata only copy-up for truncate operation ovl: add helper to force data copy-up ovl: Check redirect on index as well ovl: Set redirect on upper inode when it is linked ovl: Set redirect on metacopy files upon rename ovl: Do not set dentry type ORIGIN for broken hardlinks ovl: Add an inode flag OVL_CONST_INO ovl: Treat metacopy dentries as type OVL_PATH_MERGE ovl: Check redirects for metacopy files ovl: Move some dir related ovl_lookup_single() code in else block ovl: Do not expose metacopy only dentry from d_real() ovl: Open file with data except for the case of fsync ovl: Add helper ovl_inode_realdata() ovl: Store lower data inode in ovl_inode ovl: Fix ovl_getattr() to get number of blocks from lower ovl: Add helper ovl_dentry_lowerdata() to get lower data dentry ovl: Copy up meta inode data from lowest data inode ovl: Modify ovl_lookup() and friends to lookup metacopy dentry ...
2018-08-17fs/seq_file.c: simplify seq_file iteration code and interfaceNeilBrown
The documentation for seq_file suggests that it is necessary to be able to move the iterator to a given offset, however that is not the case. If the iterator is stored in the private data and is stable from one read() syscall to the next, it is only necessary to support first/next interactions. Implementing this in a client is a little clumsy. - if ->start() is given a pos of zero, it should go to start of sequence. - if ->start() is given the name pos that was given to the most recent next() or start(), it should restore the iterator to state just before that last call - if ->start is given another number, it should set the iterator one beyond the start just before the last ->start or ->next call. Also, the documentation says that the implementation can interpret the pos however it likes (other than zero meaning start), but seq_file increments the pos sometimes which does impose on the implementation. This patch simplifies the interface for first/next iteration and simplifies the code, while maintaining complete backward compatability. Now: - if ->start() is given a pos of zero, it should return an iterator placed at the start of the sequence - if ->start() is given a non-zero pos, it should return the iterator in the same state it was after the last ->start or ->next. This is particularly useful for interators which walk the multiple chains in a hash table, e.g. using rhashtable_walk*. See fs/gfs2/glock.c and drivers/staging/lustre/lustre/llite/vvp_dev.c A large part of achieving this is to *always* call ->next after ->show has successfully stored all of an entry in the buffer. Never just increment the index instead. Also: - always pass &m->index to ->start() and ->next(), never a temp variable - don't clear ->from when ->count is zero, as ->from is dead when ->count is zero. Some ->next functions do not increment *pos when they return NULL. To maintain compatability with this, we still need to increment m->index in one place, if ->next didn't increment it. Note that such ->next functions are buggy and should be fixed. A simple demonstration is dd if=/proc/swaps bs=1000 skip=1 Choose any block size larger than the size of /proc/swaps. This will always show the whole last line of /proc/swaps. This patch doesn't work around buggy next() functions for this case. [neilb@suse.com: ensure ->from is valid] Link: http://lkml.kernel.org/r/87601ryb8a.fsf@notabene.neil.brown.name Signed-off-by: NeilBrown <neilb@suse.com> Acked-by: Jonathan Corbet <corbet@lwn.net> [docs] Tested-by: Jann Horn <jannh@google.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Kees Cook <keescook@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-08-14Merge tag 'docs-4.19' of git://git.lwn.net/linuxLinus Torvalds
Pull documentation update from Jonathan Corbet: "This was a moderately busy cycle for docs, with the usual collection of small fixes and updates. We also have new ktime_get_*() docs from Arnd, some kernel-doc fixes, a new set of Italian translations (non so se vale la pena, ma non fa male - speriamo bene), and some extensive early memory-management documentation improvements from Mike Rapoport" * tag 'docs-4.19' of git://git.lwn.net/linux: (52 commits) Documentation: corrections to console/console.txt Documentation: add ioctl number entry for v4l2-subdev.h Remove gendered language from management style documentation scripts/kernel-doc: Escape all literal braces in regexes docs/mm: add description of boot time memory management docs/mm: memblock: add overview documentation docs/mm: memblock: add kernel-doc description for memblock types docs/mm: memblock: add kernel-doc comments for memblock_add[_node] docs/mm: memblock: update kernel-doc comments mm/memblock: add a name for memblock flags enumeration docs/mm: bootmem: add overview documentation docs/mm: bootmem: add kernel-doc description of 'struct bootmem_data' docs/mm: bootmem: fix kernel-doc warnings docs/mm: nobootmem: fixup kernel-doc comments mm/bootmem: drop duplicated kernel-doc comments Documentation: vm.txt: Adding 'nr_hugepages_mempolicy' parameter description. doc:it_IT: translation for kernel-hacking docs: Fix the reference labels in Locking.rst doc: tracing: Fix a typo of trace_stat mm: Introduce new type vm_fault_t ...
2018-08-14Merge tag 'xfs-4.19-merge-6' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linuxLinus Torvalds
Pull xfs updates from Darrick Wong: "This is the second part of the XFS changes for 4.19. The biggest changes are the removal of buffer heads frm XFS, a massive reworking of the deferred transaction operations handling code, the removal of the long defunct barrier/nobarrier mount options, and the addition of a few more online repair functions. Summary: - Use extent maps to track pagecache page status instead of bufferhead state. - Refactor pagecache read and write paths to use the new iomap library functions, which enable us to drop the old bufferhead code for pagesize == blocksize filesystems. - Set up parallel per-block-per-page metadata to track subpage information that was tracked by buffer heads, which enables us to drop the old bufferhead code for pagesize > blocksize filesystems. - Tie a deferred ops control structure to a transaction so that we can take advantage of an upper-level dfops without having to plumb pointer passing through the code. - Refactor the deferred ops code to track deferred ops as part of the transaction structure (instead of as a separate data structure) so that we can simplify the scoping rules around defer_ops. - Refactor twisty delwri buffer submission code to avoid deadlocks. - Shorten and fix indenting problems in the scrub code. - Detect obviously bad summary counts at mount and fix them. - Directly associate deferred ops control structure with a transaction so that callers no longer have to manage it themselves. - Remove a couple of IRIX-era inode macros. - Remove the long-deprecated 'barrier' and 'nobarrier' mount options. - Clean up the inode fork structure a bit. - Check for bad fs summary counter values in the superblock. - Reduce COW fork lookups during writeback. - Refactor the deferred ops control structures into the transaction structure, thereby eliminating the need for transaction users to handle the deferred ops as a separate data structure. - Add the ability to repair AG headers online. - Fix a crash due to insufficient return value checking. - Various fixes and cleanups" * tag 'xfs-4.19-merge-6' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (155 commits) xfs: fix a null pointer dereference in xfs_bmap_extents_to_btree xfs: remove b_last_holder & associated macros iomap: Switch to offset_in_page for clarity xfs: Close race between direct IO and xfs_break_layouts() xfs: repair the AGI xfs: repair the AGFL xfs: repair the AGF xfs: remove dead error handling code in xfs_dquot_disk_alloc() xfs: use WRITE_ONCE to update if_seq xfs: fix a comment in xfs_log_reserve xfs: only validate summary counts on primary superblock xfs: substitute spaces with tabs xfs: fold dfops into the transaction xfs: always defer agfl block frees xfs: pass transaction to xfs_defer_add() xfs: replace xfs_defer_ops ->dop_pending with on-stack list xfs: cancel dfops on xfs_defer_finish() error xfs: clean out superfluous dfops dop params/vars xfs: drop dop param from xfs_defer_op_type ->finish_item() callback xfs: automatic dfops inode relogging ...
2018-08-13Merge tag 'ext4_for_linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 Pull ext4 updates from Ted Ts'o: - Convert content from the ext4 wiki to Documentation rst files so it is more likely to be updated as we add new features to ext4. - Add 64-bit timestamp support to ext4's superblock fields. - ... and the usual bug fixes and cleanups, including a Spectre gadget fixup and some hardening against maliciously corrupted file systems. * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (34 commits) ext4: remove unneeded variable "err" in ext4_mb_release_inode_pa() ext4: improve code readability in ext4_iget() ext4: fix spectre gadget in ext4_mb_regular_allocator() ext4: check for NUL characters in extended attribute's name ext4: use ext4_warning() for sb_getblk failure ext4: fix race when setting the bitmap corrupted flag ext4: reset error code in ext4_find_entry in fallback ext4: handle layout changes to pinned DAX mappings dax: dax_layout_busy_page() warn on !exceptional docs: fix up the obviously obsolete bits in the new ext4 documentation docs: add new ext4 superblock time extension fields docs: create filesystem internal section ext4: use swap macro in mext_page_double_lock ext4: check allocation failure when duplicating "data" in ext4_remount() ext4: fix warning message in ext4_enable_quotas() ext4: super: extend timestamps to 40 bits jbd2: replace current_kernel_time64 with ktime equivalent ext4: use timespec64 for all inode times ext4: use ktime_get_real_seconds for i_dtime ext4: use 64-bit timestamps for mmp_time ...
2018-08-13Merge tag '4.19-smb3' of git://git.samba.org/sfrench/cifs-2.6Linus Torvalds
Pull cifs updates from Steve French: "smb3/cifs fixes (including 8 for stable). Other improvements include: - improved tracing, improved stats - snapshots (previous version mounts work now over SMB3) - performance (compounding enabled for statfs, ~40% faster). - security (make it possible to build cifs.ko with insecure vers=1.0 disabled in Kconfig)" * tag '4.19-smb3' of git://git.samba.org/sfrench/cifs-2.6: (43 commits) smb3: create smb3 equivalent alias for cifs pseudo-xattrs smb3: allow previous versions to be mounted with snapshot= mount parm cifs: don't show domain= in mount output when domain is empty cifs: add missing support for ACLs in SMB 3.11 smb3: enumerating snapshots was leaving part of the data off end cifs: update smb2_queryfs() to use compounding cifs: update receive_encrypted_standard to handle compounded responses cifs: create SMB2_open_init()/SMB2_open_free() helpers. cifs: add SMB2_query_info_[init|free]() cifs: add SMB2_close_init()/SMB2_close_free() smb3: display stats counters for number of slow commands CIFS: fix uninitialized ptr deref in smb2 signing smb3: Do not send SMB3 SET_INFO if nothing changed smb3: fix minor debug output for CONFIG_CIFS_STATS smb3: add tracepoint for slow responses cifs: add compound_send_recv() cifs: make smb_send_rqst take an array of requests cifs: update init_sg, crypt_message to take an array of rqst smb3: update readme to correct information about /proc/fs/cifs/Stats smb3: fix reset of bytes read and written stats ...
2018-08-13Merge branches 'work.misc' and 'work.dcache' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull misc vfs updates from Al Viro: "Misc cleanups from various folks all over the place I expected more fs/dcache.c cleanups this cycle, so that went into a separate branch. Said cleanups have missed the window, so in the hindsight it could've gone into work.misc instead. Decided not to cherry-pick, thus the 'work.dcache' branch" * 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: fs: dcache: Use true and false for boolean values fold generic_readlink() into its only caller fs: shave 8 bytes off of struct inode fs: Add more kernel-doc to the produced documentation fs: Fix attr.c kernel-doc removed extra extern file_fdatawait_range * 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: kill dentry_update_name_case()
2018-08-13Merge branch 'work.open3' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs open-related updates from Al Viro: - "do we need fput() or put_filp()" rules are gone - it's always fput() now. We keep track of that state where it belongs - in ->f_mode. - int *opened mess killed - in finish_open(), in ->atomic_open() instances and in fs/namei.c code around do_last()/lookup_open()/atomic_open(). - alloc_file() wrappers with saner calling conventions are introduced (alloc_file_clone() and alloc_file_pseudo()); callers converted, with much simplification. - while we are at it, saner calling conventions for path_init() and link_path_walk(), simplifying things inside fs/namei.c (both on open-related paths and elsewhere). * 'work.open3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (40 commits) few more cleanups of link_path_walk() callers allow link_path_walk() to take ERR_PTR() make path_init() unconditionally paired with terminate_walk() document alloc_file() changes make alloc_file() static do_shmat(): grab shp->shm_file earlier, switch to alloc_file_clone() new helper: alloc_file_clone() create_pipe_files(): switch the first allocation to alloc_file_pseudo() anon_inode_getfile(): switch to alloc_file_pseudo() hugetlb_file_setup(): switch to alloc_file_pseudo() ocxlflash_getfile(): switch to alloc_file_pseudo() cxl_getfile(): switch to alloc_file_pseudo() ... and switch shmem_file_setup() to alloc_file_pseudo() __shmem_file_setup(): reorder allocations new wrapper: alloc_file_pseudo() kill FILE_{CREATED,OPENED} switch atomic_open() and lookup_open() to returning 0 in all success cases document ->atomic_open() changes ->atomic_open(): return 0 in all success cases get rid of 'opened' in path_openat() and the helpers downstream ...
2018-08-13f2fs: support fault_type mount optionChao Yu
Previously, once fault injection is on, by default, all kind of faults will be injected to f2fs, if we want to trigger single or specified combined type during the test, we need to configure sysfs entry, it will be a little inconvenient to integrate sysfs configuring into testsuit, such as xfstest. So this patch introduces a new mount option 'fault_type' to assist old option 'fault_injection', with these two mount options, we can specify any fault rate/type at mount-time. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2018-08-07smb3: update readme to correct information about /proc/fs/cifs/StatsSteve French
Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Aurelien Aptel <aaptel@suse.com>
2018-08-07documentation update - remove old out of date feature infoSteve French
Following up on a suggestion by Matthew Wilcox ... The cifs CHANGES documentation file is out of date, and more current information is in the wiki. Delete the old version information that is of little use to make this documentation file more readable. CC: Matthew Wilcox <mawilcox@microsoft.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com> Reviewed-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2018-07-29docs: fix up the obviously obsolete bits in the new ext4 documentationTheodore Ts'o
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2018-07-29docs: add new ext4 superblock time extension fieldsDarrick J. Wong
The superblock timestamp fields were enlarged by u8 to be 40 bits wide. Update the documentation to reflect this. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2018-07-29docs: create filesystem internal sectionDarrick J. Wong
Create a new top-level section for documentation of filesystem usage, on-disk format information, and anything else. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2018-07-29ext4: import extended attributes chapter from wiki pageDarrick J. Wong
Import the chapter about extended attributes from the on-disk format wiki page into the kernel documentation. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2018-07-29ext4: import directory layout chapter from wiki pageDarrick J. Wong
Import the chapter about directory layout from the on-disk format wiki page into the kernel documentation. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2018-07-29ext4: import inode data fork chapter from wiki pageDarrick J. Wong
Import the chapter about inode data fork from the on-disk format wiki page into the kernel documentation. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2018-07-29ext4: import inodes chapter from wiki pageDarrick J. Wong
Import the chapter about inodes from the on-disk format wiki page into the kernel documentation. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2018-07-29ext4: import journal chapter from wiki pageDarrick J. Wong
Import the chapter about the journal from the on-disk format wiki page into the kernel documentation. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2018-07-29ext4: import multi-mount protection chapter from wiki pageDarrick J. Wong
Import the chapter about multi-mount protection from the on-disk format wiki page into the kernel documentation. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2018-07-29ext4: import bitmaps chapter from wiki pageDarrick J. Wong
Import the chapter about bitmaps from the on-disk format wiki page into the kernel documentation. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2018-07-29ext4: import group descriptors chapter from wiki pageDarrick J. Wong
Import the chapter about group descriptors from the on-disk format wiki page into the kernel documentation. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2018-07-29ext4: import superblocks chapter from wiki pageDarrick J. Wong
Import the chapter about superblocks from the on-disk format wiki page into the kernel documentation. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2018-07-29ext4: import high level design chapter from wiki pageDarrick J. Wong
Import the chapter about high level design from the on-disk format wiki page into the kernel documentation. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2018-07-29ext4: import on-disk layout book from wiki pageDarrick J. Wong
Create the basic structure of the "new" data structures & algorithms book to be ported over from the on-disk format wiki, and then start by pulling in the introductory information. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2018-07-29ext4: convert ext4.rst to restructuredtext formatDarrick J. Wong
Convert the existing ext4 documentation into rst format and link it in with the rest of the kernel documentation. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2018-07-29ext4: move ext4.txt into its own directoryDarrick J. Wong
Move Documentation/filesystems/ext4.txt into Documentation/filesystems/ext4/ext4.rst in preparation for adding more ext4 documentation. Note that the documentation isn't in rst format yet, but as it's not linked from anywhere it won't cause build errors. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2018-07-26xfs: remove deprecated barrier/nobarrier mountEric Sandeen
The barrier mount options have been no-ops and deprecated since 4cf4573 xfs: deprecate barrier/nobarrier mount option i.e. kernel 4.10 / December 2016, with a stated deprecation schedule after v4.15. Should be fair game to remove them now. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-07-23mm: Introduce new type vm_fault_tSouptick Joarder
We have introduce a new return type vm_fault_t for fault, page_mkwrite and pfn_mkwrite handlers. Update the document for the same Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2018-07-23Documentation: proc.txt: Adding 'HardwareCorrupted' field and description.Prashant Dhamdhere
Fill in missing documentation for the HardwareCorrupted field in proc.txt. Signed-off-by: Prashant Dhamdhere <pdhamdhe@redhat.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2018-07-20ovl: Provide a mount option metacopy=on/off for metadata copyupVivek Goyal
By default metadata only copy up is disabled. Provide a mount option so that users can choose one way or other. Also provide a kernel config and module option to enable/disable metacopy feature. metacopy feature requires redirect_dir=on when upper is present. Otherwise, it requires redirect_dir=follow atleast. As of now, metacopy does not work with nfs_export=on. So if both metacopy=on and nfs_export=on then nfs_export is disabled. Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Reviewed-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2018-07-20ovl: fix documentation of non-standard behaviorMiklos Szeredi
We can now drop description of the ro/rw inconsistency from the documentation. Also clarify, that now fully standard compliant behavior can be enabled with kernel/module/mount options. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2018-07-18vfs: remove open_flags from d_real()Miklos Szeredi
Opening regular files on overlayfs is now handled via ovl_open(). Remove the now unused "open_flags" argument from d_op->d_real() and the d_real() helper. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2018-07-18Revert "vfs: add flags to d_real()"Miklos Szeredi
This reverts commit 495e642939114478a5237a7d91661ba93b76f15a. No user of "flags" argument of d_real() remain. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2018-07-12document alloc_file() changesAl Viro
Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-07-12document ->atomic_open() changesAl Viro
Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-07-10Documentation : Update relay function typesYohan Pipereau
This patch updates two callback functions provided as an example in relay API documentation : subbuf_start and create_buf_file_handler. These functions were using older and incorrect types causing an "initialization from incompatible pointer type". Signed-off-by: Yohan Pipereau <yohan.pipereau@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2018-07-03fs: Add more kernel-doc to the produced documentationMatthew Wilcox
People have gone to all the effort of writing kernel-doc for these functions; the least we can do is put them in the "Other functions" part of the VFS documentation. Signed-off-by: Matthew Wilcox <willy@infradead.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-06-28Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLLLinus Torvalds
The poll() changes were not well thought out, and completely unexplained. They also caused a huge performance regression, because "->poll()" was no longer a trivial file operation that just called down to the underlying file operations, but instead did at least two indirect calls. Indirect calls are sadly slow now with the Spectre mitigation, but the performance problem could at least be largely mitigated by changing the "->get_poll_head()" operation to just have a per-file-descriptor pointer to the poll head instead. That gets rid of one of the new indirections. But that doesn't fix the new complexity that is completely unwarranted for the regular case. The (undocumented) reason for the poll() changes was some alleged AIO poll race fixing, but we don't make the common case slower and more complex for some uncommon special case, so this all really needs way more explanations and most likely a fundamental redesign. [ This revert is a revert of about 30 different commits, not reverted individually because that would just be unnecessarily messy - Linus ] Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-06-15cifs: minor documentation updatesSteve French
Various minor cifs/smb3 documentation updates Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
2018-06-15Merge tag 'ceph-for-4.18-rc1' of git://github.com/ceph/ceph-clientLinus Torvalds
Pull ceph updates from Ilya Dryomov: "The main piece is a set of libceph changes that revamps how OSD requests are aborted, improving CephFS ENOSPC handling and making "umount -f" actually work (Zheng and myself). The rest is mostly mount option handling cleanups from Chengguang and assorted fixes from Zheng, Luis and Dongsheng. * tag 'ceph-for-4.18-rc1' of git://github.com/ceph/ceph-client: (31 commits) rbd: flush rbd_dev->watch_dwork after watch is unregistered ceph: update description of some mount options ceph: show ino32 if the value is different with default ceph: strengthen rsize/wsize/readdir_max_bytes validation ceph: fix alignment of rasize ceph: fix use-after-free in ceph_statfs() ceph: prevent i_version from going back ceph: fix wrong check for the case of updating link count libceph: allocate the locator string with GFP_NOFAIL libceph: make abort_on_full a per-osdc setting libceph: don't abort reads in ceph_osdc_abort_on_full() libceph: avoid a use-after-free during map check libceph: don't warn if req->r_abort_on_full is set libceph: use for_each_request() in ceph_osdc_abort_on_full() libceph: defer __complete_request() to a workqueue libceph: move more code into __complete_request() libceph: no need to call flush_workqueue() before destruction ceph: flush pending works before shutdown super ceph: abort osd requests on force umount libceph: introduce ceph_osdc_abort_requests() ...
2018-06-11Merge tag 'f2fs-for-4.18' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs Pull f2fs updates from Jaegeuk Kim: "In this round, we've mainly focused on discard, aka unmap, control along with fstrim for Android-specific usage model. In addition, we've fixed writepage flow which returned EAGAIN previously resulting in EIO of fsync(2) due to mapping's error state. In order to avoid old MM bug [1], we decided not to use __GFP_ZERO for the mapping for node and meta page caches. As always, we've cleaned up many places for future fsverity and symbol conflicts. Enhancements: - do discard/fstrim in lower priority considering fs utilization - split large discard commands into smaller ones for better responsiveness - add more sanity checks to address syzbot reports - add a mount option, fsync_mode=nobarrier, which can reduce # of cache flushes - clean up symbol namespace with modified function names - be strict on block allocation and IO control in corner cases Bug fixes: - don't use __GFP_ZERO for mappings - fix error reports in writepage to avoid fsync() failure - avoid selinux denial on CAP_RESOURCE on resgid/resuid - fix some subtle race conditions in GC/atomic writes/shutdown - fix overflow bugs in sanity_check_raw_super - fix missing bits on get_flags Clean-ups: - prepare the generic flow for future fsverity integration - fix some broken coding standard" [1] https://lkml.org/lkml/2018/4/8/661 * tag 'f2fs-for-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (79 commits) f2fs: fix to clear FI_VOLATILE_FILE correctly f2fs: let sync node IO interrupt async one f2fs: don't change wbc->sync_mode f2fs: fix to update mtime correctly fs: f2fs: insert space around that ':' and ', ' fs: f2fs: add missing blank lines after declarations fs: f2fs: changed variable type of offset "unsigned" to "loff_t" f2fs: clean up symbol namespace f2fs: make set_de_type() static f2fs: make __f2fs_write_data_pages() static f2fs: fix to avoid accessing cross the boundary f2fs: fix to let caller retry allocating block address disable loading f2fs module on PAGE_SIZE > 4KB f2fs: fix error path of move_data_page f2fs: don't drop dentry pages after fs shutdown f2fs: fix to avoid race during access gc_thread pointer f2fs: clean up with clear_radix_tree_dirty_tag f2fs: fix to don't trigger writeback during recovery f2fs: clear discard_wake earlier f2fs: let discard thread wait a little longer if dev is busy ...
2018-06-09Merge tag 'staging-4.18-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging Pull staging/IIO updates from Greg KH: "Here is the big staging and IIO driver update for 4.18-rc1. It was delayed as I wanted to make sure the final driver deletions did not cause any major merge issues, and all now looks good. There are a lot of patches here, just over 1000. The diffstat summary shows the major changes here: 1007 files changed, 16828 insertions(+), 227770 deletions(-) Because of this, we might be close to shrinking the overall kernel source code size for two releases in a row. There was loads of work in this release cycle, primarily: - tons of ks7010 driver cleanups - lots of mt7621 driver fixes and cleanups - most driver cleanups - wilc1000 fixes and cleanups - lots and lots of IIO driver cleanups and new additions - debugfs cleanups for all staging drivers - lots of other staging driver cleanups and fixes, the shortlog has the full details. but the big user-visable things here are the removal of 3 chunks of code: - ncpfs and ipx were removed on schedule, no one has cared about this code since it moved to staging last year, and if it needs to come back, it can be reverted. - lustre file system is removed. I've ranted at the lustre developers about once a year for the past 5 years, with no real forward progress at all to clean things up and get the code into the "real" part of the kernel. Given that the lustre developers continue to work on an external tree and try to port those changes to the in-kernel tree every once in a while, this whole thing really really is not working out at all. So I'm deleting it so that the developers can spend the time working in their out-of-tree location and get things cleaned up properly to get merged into the tree correctly at a later date. Because of these file removals, you will have merge issues on some of these files (2 in the ipx code, 1 in the ncpfs code, and 1 in the atomisp driver). Just delete those files, it's a simple merge :) All of this has been in linux-next for a while with no reported problems" * tag 'staging-4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (1011 commits) staging: ipx: delete it from the tree ncpfs: remove uapi .h files ncpfs: remove Documentation ncpfs: remove compat functionality staging: ncpfs: delete it staging: lustre: delete the filesystem from the tree. staging: vc04_services: no need to save the log debufs dentries staging: vc04_services: vchiq_debugfs_log_entry can be a void * staging: vc04_services: remove struct vchiq_debugfs_info staging: vc04_services: move client dbg directory into static variable staging: vc04_services: remove odd vchiq_debugfs_top() wrapper staging: vc04_services: no need to check debugfs return values staging: mt7621-gpio: reorder includes alphabetically staging: mt7621-gpio: change gc_map to don't use pointers staging: mt7621-gpio: use GPIOF_DIR_OUT and GPIOF_DIR_IN macros instead of custom values staging: mt7621-gpio: change 'to_mediatek_gpio' to make just a one line return staging: mt7621-gpio: dt-bindings: update documentation for #interrupt-cells property staging: mt7621-gpio: update #interrupt-cells for the gpio node staging: mt7621-gpio: dt-bindings: complete documentation for the gpio staging: mt7621-dts: add missing properties to gpio node ...
2018-06-07autofs: use autofs instead of autofs4 in documentationIan Kent
Finally remove autofs4 references in the filesystems documentation. Link: http://lkml.kernel.org/r/152626709055.28589.416082809460051475.stgit@pluto.themaw.net Signed-off-by: Ian Kent <raven@themaw.net> Cc: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-06-07autofs: rename autofs documentation filesIan Kent
There are two files in Documentation/filsystems that should now use autofs rather than autofs4 in their names. Link: http://lkml.kernel.org/r/152626707957.28589.3325300375892913999.stgit@pluto.themaw.net Signed-off-by: Ian Kent <raven@themaw.net> Cc: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>