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* ext4: add shutdown bit and check for itTheodore Ts'o2017-02-051-0/+3
| | | | | | | Add a shutdown bit that will cause ext4 processing to fail immediately with EIO. Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* ext4: fix inline data error pathsTheodore Ts'o2017-02-051-1/+8
| | | | | | | | The write_end() function must always unlock the page and drop its ref count, even on an error. Signed-off-by: Theodore Ts'o <tytso@mit.edu> Cc: stable@vger.kernel.org
* ext4: propagate error values from ext4_inline_data_truncate()Theodore Ts'o2017-01-231-17/+23
| | | | Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* ext4: avoid calling ext4_mark_inode_dirty() under unneeded semaphoresTheodore Ts'o2017-01-121-6/+3
| | | | | | | | There is no need to call ext4_mark_inode_dirty while holding xattr_sem or i_data_sem, so where it's easy to avoid it, move it out from the critical region. Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* ext4: fix deadlock between inline_data and ext4_expand_extra_isize_ea()Theodore Ts'o2017-01-121-36/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The xattr_sem deadlock problems fixed in commit 2e81a4eeedca: "ext4: avoid deadlock when expanding inode size" didn't include the use of xattr_sem in fs/ext4/inline.c. With the addition of project quota which added a new extra inode field, this exposed deadlocks in the inline_data code similar to the ones fixed by 2e81a4eeedca. The deadlock can be reproduced via: dmesg -n 7 mke2fs -t ext4 -O inline_data -Fq -I 256 /dev/vdc 32768 mount -t ext4 -o debug_want_extra_isize=24 /dev/vdc /vdc mkdir /vdc/a umount /vdc mount -t ext4 /dev/vdc /vdc echo foo > /vdc/a/foo and looks like this: [ 11.158815] [ 11.160276] ============================================= [ 11.161960] [ INFO: possible recursive locking detected ] [ 11.161960] 4.10.0-rc3-00015-g011b30a8a3cf #160 Tainted: G W [ 11.161960] --------------------------------------------- [ 11.161960] bash/2519 is trying to acquire lock: [ 11.161960] (&ei->xattr_sem){++++..}, at: [<c1225a4b>] ext4_expand_extra_isize_ea+0x3d/0x4cd [ 11.161960] [ 11.161960] but task is already holding lock: [ 11.161960] (&ei->xattr_sem){++++..}, at: [<c1227941>] ext4_try_add_inline_entry+0x3a/0x152 [ 11.161960] [ 11.161960] other info that might help us debug this: [ 11.161960] Possible unsafe locking scenario: [ 11.161960] [ 11.161960] CPU0 [ 11.161960] ---- [ 11.161960] lock(&ei->xattr_sem); [ 11.161960] lock(&ei->xattr_sem); [ 11.161960] [ 11.161960] *** DEADLOCK *** [ 11.161960] [ 11.161960] May be due to missing lock nesting notation [ 11.161960] [ 11.161960] 4 locks held by bash/2519: [ 11.161960] #0: (sb_writers#3){.+.+.+}, at: [<c11a2414>] mnt_want_write+0x1e/0x3e [ 11.161960] #1: (&type->i_mutex_dir_key){++++++}, at: [<c119508b>] path_openat+0x338/0x67a [ 11.161960] #2: (jbd2_handle){++++..}, at: [<c123314a>] start_this_handle+0x582/0x622 [ 11.161960] #3: (&ei->xattr_sem){++++..}, at: [<c1227941>] ext4_try_add_inline_entry+0x3a/0x152 [ 11.161960] [ 11.161960] stack backtrace: [ 11.161960] CPU: 0 PID: 2519 Comm: bash Tainted: G W 4.10.0-rc3-00015-g011b30a8a3cf #160 [ 11.161960] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.1-1 04/01/2014 [ 11.161960] Call Trace: [ 11.161960] dump_stack+0x72/0xa3 [ 11.161960] __lock_acquire+0xb7c/0xcb9 [ 11.161960] ? kvm_clock_read+0x1f/0x29 [ 11.161960] ? __lock_is_held+0x36/0x66 [ 11.161960] ? __lock_is_held+0x36/0x66 [ 11.161960] lock_acquire+0x106/0x18a [ 11.161960] ? ext4_expand_extra_isize_ea+0x3d/0x4cd [ 11.161960] down_write+0x39/0x72 [ 11.161960] ? ext4_expand_extra_isize_ea+0x3d/0x4cd [ 11.161960] ext4_expand_extra_isize_ea+0x3d/0x4cd [ 11.161960] ? _raw_read_unlock+0x22/0x2c [ 11.161960] ? jbd2_journal_extend+0x1e2/0x262 [ 11.161960] ? __ext4_journal_get_write_access+0x3d/0x60 [ 11.161960] ext4_mark_inode_dirty+0x17d/0x26d [ 11.161960] ? ext4_add_dirent_to_inline.isra.12+0xa5/0xb2 [ 11.161960] ext4_add_dirent_to_inline.isra.12+0xa5/0xb2 [ 11.161960] ext4_try_add_inline_entry+0x69/0x152 [ 11.161960] ext4_add_entry+0xa3/0x848 [ 11.161960] ? __brelse+0x14/0x2f [ 11.161960] ? _raw_spin_unlock_irqrestore+0x44/0x4f [ 11.161960] ext4_add_nondir+0x17/0x5b [ 11.161960] ext4_create+0xcf/0x133 [ 11.161960] ? ext4_mknod+0x12f/0x12f [ 11.161960] lookup_open+0x39e/0x3fb [ 11.161960] ? __wake_up+0x1a/0x40 [ 11.161960] ? lock_acquire+0x11e/0x18a [ 11.161960] path_openat+0x35c/0x67a [ 11.161960] ? sched_clock_cpu+0xd7/0xf2 [ 11.161960] do_filp_open+0x36/0x7c [ 11.161960] ? _raw_spin_unlock+0x22/0x2c [ 11.161960] ? __alloc_fd+0x169/0x173 [ 11.161960] do_sys_open+0x59/0xcc [ 11.161960] SyS_open+0x1d/0x1f [ 11.161960] do_int80_syscall_32+0x4f/0x61 [ 11.161960] entry_INT80_32+0x2f/0x2f [ 11.161960] EIP: 0xb76ad469 [ 11.161960] EFLAGS: 00000286 CPU: 0 [ 11.161960] EAX: ffffffda EBX: 08168ac8 ECX: 00008241 EDX: 000001b6 [ 11.161960] ESI: b75e46bc EDI: b7755000 EBP: bfbdb108 ESP: bfbdafc0 [ 11.161960] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b Cc: stable@vger.kernel.org # 3.10 (requires 2e81a4eeedca as a prereq) Reported-by: George Spelvin <linux@sciencehorizons.net> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* ext4: return -ENOMEM instead of successDan Carpenter2016-12-101-1/+3
| | | | | | | | | We should set the error code if kzalloc() fails. Fixes: 67cf5b09a46f ("ext4: add the basic function for inline data support") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Cc: stable@vger.kernel.org
* ext4: only set S_DAX if DAX is really supportedJan Kara2016-11-201-0/+10
| | | | | | | | | | | | Currently we have S_DAX set inode->i_flags for a regular file whenever ext4 is mounted with dax mount option. However in some cases we cannot really do DAX - e.g. when inode is marked to use data journalling, when inode data is being encrypted, or when inode is stored inline. Make sure S_DAX flag is appropriately set/cleared in these cases. Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* ext4: use current_time() for inode timestampsDeepa Dinamani2016-11-151-2/+2
| | | | | | | | | | | | | | | | | | | | CURRENT_TIME_SEC and CURRENT_TIME are not y2038 safe. current_time() will be transitioned to be y2038 safe along with vfs. current_time() returns timestamps according to the granularities set in the super_block. The granularity check in ext4_current_time() to call current_time() or CURRENT_TIME_SEC is not required. Use current_time() directly to obtain timestamps unconditionally, and remove ext4_current_time(). Quota files are assumed to be on the same filesystem. Hence, use current_time() for these files as well. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
* ext4 crypto: migrate into vfs's crypto engineJaegeuk Kim2016-07-101-7/+7
| | | | | | | | | This patch removes the most parts of internal crypto codes. And then, it modifies and adds some ext4-specific crypt codes to use the generic facility. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* ext4: remove trailing \n from ext4_warning/ext4_error callsJakub Wilk2016-04-271-1/+1
| | | | | | | Messages passed to ext4_warning() or ext4_error() don't need trailing newlines, because these function add the newlines themselves. Signed-off-by: Jakub Wilk <jwilk@jwilk.net>
* mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macrosKirill A. Shutemov2016-04-041-9/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* ext4: drop unneeded BUFFER_TRACE in ext4_delete_inline_entry()Geliang Tang2016-03-101-1/+0
| | | | | | | | BUFFER_TRACE info "call ext4_handle_dirty_metadata" doesn't match the code, so drop it. Signed-off-by: Geliang Tang <geliangtang@163.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* ext4: rename and split get blocks functionsJan Kara2016-03-091-3/+4
| | | | | | | | | | Rename ext4_get_blocks_write() to ext4_get_blocks_unwritten() to better describe what it does. Also split out get blocks functions for direct IO. Later we move functionality from _ext4_get_blocks() there. There's no functional change in this patch. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* ext4 crypto: simplify interfaces to directory entry insert functionsTheodore Ts'o2016-01-081-6/+4
| | | | | | | | | | | A number of functions include ext4_add_dx_entry, make_indexed_dir, etc. are being passed a dentry even though the only thing they use is the containing parent. We can shrink the code size slightly by making this replacement. This will also be useful in cases where we don't have a dentry as the argument to the directory entry insert functions. Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* ext4: clean up feature test macros with predicate functionsDarrick J. Wong2015-10-171-2/+1
| | | | | | | | Create separate predicate functions to test/set/clear feature flags, thereby replacing the wordy old macros. Furthermore, clean out the places where we open-coded feature tests. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
* ext4 crypto: optimize filename encryptionTheodore Ts'o2015-05-181-16/+15
| | | | | | | | | | | | | | Encrypt the filename as soon it is passed in by the user. This avoids our needing to encrypt the filename 2 or 3 times while in the process of creating a filename. Similarly, when looking up a directory entry, encrypt the filename early, or if the encryption key is not available, base-64 decode the file syystem so that the hash value and the last 16 bytes of the encrypted filename is available in the new struct ext4_filename data structure. Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* Merge branch 'for-linus' of ↵Linus Torvalds2015-04-271-2/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull fourth vfs update from Al Viro: "d_inode() annotations from David Howells (sat in for-next since before the beginning of merge window) + four assorted fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: RCU pathwalk breakage when running into a symlink overmounting something fix I_DIO_WAKEUP definition direct-io: only inc/dec inode->i_dio_count for file systems fs/9p: fix readdir() VFS: assorted d_backing_inode() annotations VFS: fs/inode.c helpers: d_inode() annotations VFS: fs/cachefiles: d_backing_inode() annotations VFS: fs library helpers: d_inode() annotations VFS: assorted weird filesystems: d_inode() annotations VFS: normal filesystems (and lustre): d_inode() annotations VFS: security/: d_inode() annotations VFS: security/: d_backing_inode() annotations VFS: net/: d_inode() annotations VFS: net/unix: d_backing_inode() annotations VFS: kernel/: d_inode() annotations VFS: audit: d_backing_inode() annotations VFS: Fix up some ->d_inode accesses in the chelsio driver VFS: Cachefiles should perform fs modifications on the top layer only VFS: AF_UNIX sockets should call mknod on the top layer only
| * VFS: normal filesystems (and lustre): d_inode() annotationsDavid Howells2015-04-151-2/+2
| | | | | | | | | | | | | | that's the bulk of filesystem drivers dealing with inodes of their own Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | ext4 crypto: insert encrypted filenames into a leaf directory blockMichael Halcrow2015-04-121-2/+5
| | | | | | | | | | | | | | Signed-off-by: Uday Savagaonkar <savagaon@google.com> Signed-off-by: Ildar Muslukhov <ildarm@google.com> Signed-off-by: Michael Halcrow <mhalcrow@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* | ext4 crypto: teach ext4_htree_store_dirent() to store decrypted filenamesTheodore Ts'o2015-04-121-2/+5
| | | | | | | | | | | | | | | | | | For encrypted directories, we need to pass in a separate parameter for the decrypted filename, since the directory entry contains the encrypted filename. Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* | ext4: fix transposition typo in format stringRasmus Villemoes2015-04-021-1/+1
|/ | | | | | | | | | | | | | | | | According to C99, %*.s means the same as %*.0s, in other words, print as many spaces as the field width argument says and effectively ignore the string argument. That is certainly not what was meant here. The kernel's printf implementation, however, treats it as if the . was not there, i.e. as %*s. I don't know if de->name is nul-terminated or not, but in any case I'm guessing the intention was to use de->name_len as precision instead of field width. [ Note: this is debugging code which is commented out, so this is not security issue; a developer would have to explicitly enable INLINE_DIR_DEBUG before this would be an issue. ] Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* ext4: ext4_da_convert_inline_data_to_extent drop locked page after errorDmitry Monakhov2014-12-061-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Testcase: xfstests generic/270 MKFS_OPTIONS="-q -I 256 -O inline_data,64bit" Call Trace: [<ffffffff81144c76>] lock_page+0x35/0x39 -------> DEADLOCK [<ffffffff81145260>] pagecache_get_page+0x65/0x15a [<ffffffff811507fc>] truncate_inode_pages_range+0x1db/0x45c [<ffffffff8120ea63>] ? ext4_da_get_block_prep+0x439/0x4b6 [<ffffffff811b29b7>] ? __block_write_begin+0x284/0x29c [<ffffffff8120e62a>] ? ext4_change_inode_journal_flag+0x16b/0x16b [<ffffffff81150af0>] truncate_inode_pages+0x12/0x14 [<ffffffff81247cb4>] ext4_truncate_failed_write+0x19/0x25 [<ffffffff812488cf>] ext4_da_write_inline_data_begin+0x196/0x31c [<ffffffff81210dad>] ext4_da_write_begin+0x189/0x302 [<ffffffff810c07ac>] ? trace_hardirqs_on+0xd/0xf [<ffffffff810ddd13>] ? read_seqcount_begin.clone.1+0x9f/0xcc [<ffffffff8114309d>] generic_perform_write+0xc7/0x1c6 [<ffffffff810c040e>] ? mark_held_locks+0x59/0x77 [<ffffffff811445d1>] __generic_file_write_iter+0x17f/0x1c5 [<ffffffff8120726b>] ext4_file_write_iter+0x2a5/0x354 [<ffffffff81185656>] ? file_start_write+0x2a/0x2c [<ffffffff8107bcdb>] ? bad_area_nosemaphore+0x13/0x15 [<ffffffff811858ce>] new_sync_write+0x8a/0xb2 [<ffffffff81186e7b>] vfs_write+0xb5/0x14d [<ffffffff81186ffb>] SyS_write+0x5c/0x8c [<ffffffff816f2529>] system_call_fastpath+0x12/0x17 Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* ext4: ext4_inline_data_fiemap should respect callers argumentDmitry Monakhov2014-12-021-6/+13
| | | | | | | | | Currently ext4_inline_data_fiemap ignores requested arguments (start and len) which may lead endless loop if start != 0. Also fix incorrect extent length determination. Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* ext4: prevent fsreentrance deadlock for inline_dataDmitry Monakhov2014-12-021-5/+6
| | | | | | | | | | ext4_da_convert_inline_data_to_extent() invokes grab_cache_page_write_begin(). grab_cache_page_write_begin performs memory allocation, so fs-reentrance should be prohibited because we are inside journal transaction. Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* ext4: Replace open coded mdata csum feature to helper functionDmitry Monakhov2014-10-131-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Besides the fact that this replacement improves code readability it also protects from errors caused direct EXT4_S(sb)->s_es manipulation which may result attempt to use uninitialized csum machinery. #Testcase_BEGIN IMG=/dev/ram0 MNT=/mnt mkfs.ext4 $IMG mount $IMG $MNT #Enable feature directly on disk, on mounted fs tune2fs -O metadata_csum $IMG # Provoke metadata update, likey result in OOPS touch $MNT/test umount $MNT #Testcase_END # Replacement script @@ expression E; @@ - EXT4_HAS_RO_COMPAT_FEATURE(E, EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) + ext4_has_metadata_csum(E) https://bugzilla.kernel.org/show_bug.cgi?id=82201 Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Cc: stable@vger.kernel.org
* ext4: don't keep using page if inline conversion failsDarrick J. Wong2014-09-111-1/+3
| | | | | | | | | | | | | | If inline->extent conversion fails (most probably due to ENOSPC) and we release the temporary page that we allocated to transfer the file contents, don't keep using the page pointer after releasing the page. This occasionally leads to complaints about evicting locked pages or hangs when blocksize > pagesize, because it's possible for the page to get reallocated elsewhere in the meantime. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jan Kara <jack@suse.cz> Cc: Tao Ma <tm@tao.ma>
* ext4: check inline directory before convertingDarrick J. Wong2014-07-281-0/+12
| | | | | | | | | | Before converting an inline directory to a regular directory, check the directory entries to make sure they're not obviously broken. This helps us to avoid a BUG_ON if one of the dirents is trashed. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Andreas Dilger <adilger@dilger.ca>
* ext4: make ext4_has_inline_data() as a inline functionZheng Liu2014-07-151-6/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now ext4_has_inline_data() is used in wide spread codepaths. So we need to make it as a inline function to avoid burning some CPU cycles. Change in text size: text data bss dec hex filename before: 326110 19258 5528 350896 55ab0 fs/ext4/ext4.o after: 326227 19258 5528 351013 55b25 fs/ext4/ext4.o I use the following script to measure the CPU usage. #!/bin/bash shm_base='/dev/shm' img=${shm_base}/ext4-img mnt=/mnt/loop e2fsprgs_base=$HOME/e2fsprogs mkfs=${e2fsprgs_base}/misc/mke2fs fsck=${e2fsprgs_base}/e2fsck/e2fsck sudo umount $mnt dd if=/dev/zero of=$img bs=4k count=3145728 ${mkfs} -t ext4 -O inline_data -F $img sudo mount -t ext4 -o loop $img $mnt # start testing... testdir="${mnt}/testdir" mkdir $testdir cd $testdir echo "start testing..." for ((cnt=0;cnt<100;cnt++)); do for ((i=0;i<5;i++)); do for ((j=0;j<5;j++)); do for ((k=0;k<5;k++)); do for ((l=0;l<5;l++)); do mkdir -p $i/$j/$k/$l echo "$i-$j-$k-$l" > $i/$j/$k/$l/testfile done done done done ls -R $testdir > /dev/null rm -rf $testdir/* done The result of `perf top -G -U` is as below. vanilla: 13.92% [ext4] [k] ext4_do_update_inode 9.36% [ext4] [k] __ext4_get_inode_loc 4.07% [ext4] [k] ftrace_define_fields_ext4_writepages 3.83% [ext4] [k] __ext4_handle_dirty_metadata 3.42% [ext4] [k] ext4_get_inode_flags 2.71% [ext4] [k] ext4_mark_iloc_dirty 2.46% [ext4] [k] ftrace_define_fields_ext4_direct_IO_enter 2.26% [ext4] [k] ext4_get_inode_loc 2.22% [ext4] [k] ext4_has_inline_data [...] After applied the patch, we don't see ext4_has_inline_data() because it has been inlined and perf couldn't sample it. Although it doesn't mean that the CPU cycles can be saved but at least the overhead of function calls can be eliminated. So IMHO we'd better inline this function. Cc: Andreas Dilger <adilger.kernel@dilger.ca> Signed-off-by: Zheng Liu <wenqing.lz@taobao.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* ext4: add missing BUFFER_TRACE before ext4_journal_get_write_accessliang xie2014-05-131-0/+5
| | | | | | | Make them more consistently Signed-off-by: xieliang <xieliang@xiaomi.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: make local functions staticStephen Hemminger2014-05-121-5/+5
| | | | | | | | I have been running make namespacecheck to look for unneeded globals, and found these in ext4. Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: delete "set but not used" variablesjon ernst2014-01-111-2/+0
| | | | | | Signed-off-by: Jon Ernst <jonernst07@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>
* ext4: avoid clearing beyond i_blocks when truncating an inline data fileTheodore Ts'o2014-01-071-3/+5
| | | | | | | | | | | | A missing cast means that when we are truncating a file which is less than 60 bytes, we don't clear the correct area of memory, and in fact we can end up truncating the next inode in the inode table, or worse yet, some other kernel data structure. Addresses-Coverity-Id: #751987 Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
* ext4: standardize error handling in ext4_da_write_inline_data_begin()Jan Kara2014-01-061-7/+4
| | | | | | | | | The function has a bit non-standard (for ext4) error recovery in that it used a mix of 'out' labels and testing for 'handle' being NULL. There isn't a good reason for that in the function so clean it up a bit. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: retry allocation when inline->extent conversion failedJan Kara2014-01-061-0/+7
| | | | | | | | | | Similarly as other ->write_begin functions in ext4, also ext4_da_write_inline_data_begin() should retry allocation if the conversion failed because of ENOSPC. This avoids returning ENOSPC prematurely because of uncommitted block deletions. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: drop set but otherwise unused variable from ext4_add_dirent_to_inline()Azat Khuzhin2013-10-301-2/+0
| | | | | Signed-off-by: Azat Khuzhin <a3at.mail@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: change ext4_read_inline_dir() to return 0 on successBoxiLiu2013-10-301-0/+1
| | | | | | | | | | | | In ext4_read_inline_dir(), if there is inline data, the successful return value is the return value of ext4_read_inline_data(). Howewer, this is used by ext4_readdir(), and while it seems harmless to return a positive value on success, it's inconsistent, since historically we've always return 0 on success. Signed-off-by: BoxiLiu <lewis.liulei@huawei.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Acked-by: Tao Ma <boyu.mt@taobao.com>
* Merge tag 'ext4_for_linus' of ↵Linus Torvalds2013-07-021-2/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 Pull ext4 update from Ted Ts'o: "Lots of bug fixes, cleanups and optimizations. In the bug fixes category, of note is a fix for on-line resizing file systems where the block size is smaller than the page size (i.e., file systems 1k blocks on x86, or more interestingly file systems with 4k blocks on Power or ia64 systems.) In the cleanup category, the ext4's punch hole implementation was significantly improved by Lukas Czerner, and now supports bigalloc file systems. In addition, Jan Kara significantly cleaned up the write submission code path. We also improved error checking and added a few sanity checks. In the optimizations category, two major optimizations deserve mention. The first is that ext4_writepages() is now used for nodelalloc and ext3 compatibility mode. This allows writes to be submitted much more efficiently as a single bio request, instead of being sent as individual 4k writes into the block layer (which then relied on the elevator code to coalesce the requests in the block queue). Secondly, the extent cache shrink mechanism, which was introduce in 3.9, no longer has a scalability bottleneck caused by the i_es_lru spinlock. Other optimizations include some changes to reduce CPU usage and to avoid issuing empty commits unnecessarily." * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (86 commits) ext4: optimize starting extent in ext4_ext_rm_leaf() jbd2: invalidate handle if jbd2_journal_restart() fails ext4: translate flag bits to strings in tracepoints ext4: fix up error handling for mpage_map_and_submit_extent() jbd2: fix theoretical race in jbd2__journal_restart ext4: only zero partial blocks in ext4_zero_partial_blocks() ext4: check error return from ext4_write_inline_data_end() ext4: delete unnecessary C statements ext3,ext4: don't mess with dir_file->f_pos in htree_dirblock_to_tree() jbd2: move superblock checksum calculation to jbd2_write_superblock() ext4: pass inode pointer instead of file pointer to punch hole ext4: improve free space calculation for inline_data ext4: reduce object size when !CONFIG_PRINTK ext4: improve extent cache shrink mechanism to avoid to burn CPU time ext4: implement error handling of ext4_mb_new_preallocation() ext4: fix corruption when online resizing a fs with 1K block size ext4: delete unused variables ext4: return FIEMAP_EXTENT_UNKNOWN for delalloc extents jbd2: remove debug dependency on debug_fs and update Kconfig help text jbd2: use a single printk for jbd_debug() ...
| * ext4: improve free space calculation for inline_databoxi liu2013-07-011-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | In ext4 feature inline_data,it use the xattr's space to store the inline data in inode.When we calculate the inline data as the xattr,we add the pad.But in get_max_inline_xattr_value_size() function we count the free space without pad.It cause some contents are moved to a block even if it can be stored in the inode. Signed-off-by: liulei <lewis.liulei@huawei.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Reviewed-by: Tao Ma <boyu.mt@taobao.com>
| * ext4: fix data offset overflow on 32-bit archs in ext4_inline_data_fiemap()Jan Kara2013-06-011-1/+1
| | | | | | | | | | | | | | | | | | | | On 32-bit archs when sector_t is defined as 32-bit the logic computing data offset in ext4_inline_data_fiemap(). Fix that by properly typing the shifted value. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* | [readdir] convert ext4Al Viro2013-06-291-98/+66
|/ | | | | | and trim the living hell out bogosities in inline dir case Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* ext4: fix readdir error in case inline_data+^dir_index.Tao Ma2013-04-191-18/+51
| | | | | | | | | | | | | | | | | | Zach reported a problem that if inline data is enabled, we don't tell the difference between the offset of '.' and '..'. And a getdents will fail if the user only want to get '.'. And what's worse, we may meet with duplicate dir entries as the offset for inline dir and non-inline one is quite different. This patch just try to resolve this problem if dir_index is disabled. In this case, f_pos is the real offset with the dir block, so for inline dir, we just pretend as if we are a dir block and returns the offset like a norml dir block does. Reported-by: Zach Brown <zab@redhat.com> Signed-off-by: Tao Ma <boyu.mt@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: fix readdir error in the case of inline_data+dir_indexTao Ma2013-04-191-1/+108
| | | | | | | | | | | | | | | | | | | | | | Zach reported a problem that if inline data is enabled, we don't tell the difference between the offset of '.' and '..'. And a getdents will fail if the user only want to get '.' and what's worse, if there is a conversion happens when the user calls getdents many times, he/she may get the same entry twice. In theory, a dir block would also fail if it is converted to a hashed-index based dir since f_pos will become a hash value, not the real one, but it doesn't happen. And a deep investigation shows that we uses a hash based solution even for a normal dir if the dir_index feature is enabled. So this patch just adds a new htree_inlinedir_to_tree for inline dir, and if we find that the hash index is supported, we will do like what we do for a dir block. Reported-by: Zach Brown <zab@redhat.com> Signed-off-by: Tao Ma <boyu.mt@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* Merge branch 'for-linus' of ↵Linus Torvalds2013-02-271-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs pile (part one) from Al Viro: "Assorted stuff - cleaning namei.c up a bit, fixing ->d_name/->d_parent locking violations, etc. The most visible changes here are death of FS_REVAL_DOT (replaced with "has ->d_weak_revalidate()") and a new helper getting from struct file to inode. Some bits of preparation to xattr method interface changes. Misc patches by various people sent this cycle *and* ocfs2 fixes from several cycles ago that should've been upstream right then. PS: the next vfs pile will be xattr stuff." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (46 commits) saner proc_get_inode() calling conventions proc: avoid extra pde_put() in proc_fill_super() fs: change return values from -EACCES to -EPERM fs/exec.c: make bprm_mm_init() static ocfs2/dlm: use GFP_ATOMIC inside a spin_lock ocfs2: fix possible use-after-free with AIO ocfs2: Fix oops in ocfs2_fast_symlink_readpage() code path get_empty_filp()/alloc_file() leave both ->f_pos and ->f_version zero target: writev() on single-element vector is pointless export kernel_write(), convert open-coded instances fs: encode_fh: return FILEID_INVALID if invalid fid_type kill f_vfsmnt vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op nfsd: handle vfs_getattr errors in acl protocol switch vfs_getattr() to struct path default SET_PERSONALITY() in linux/elf.h ceph: prepopulate inodes only when request is aborted d_hash_and_lookup(): export, switch open-coded instances 9p: switch v9fs_set_create_acl() to inode+fid, do it before d_instantiate() 9p: split dropping the acls from v9fs_set_create_acl() ...
| * new helper: file_inode(file)Al Viro2013-02-231-1/+1
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | ext4: pass context information to jbd2__journal_start()Theodore Ts'o2013-02-091-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | So we can better understand what bits of ext4 are responsible for long-running jbd2 handles, use jbd2__journal_start() so we can pass context information for logging purposes. The recommended way for finding the longer-running handles is: T=/sys/kernel/debug/tracing EVENT=$T/events/jbd2/jbd2_handle_stats echo "interval > 5" > $EVENT/filter echo 1 > $EVENT/enable ./run-my-fs-benchmark cat $T/trace > /tmp/problem-handles This will list handles that were active for longer than 20ms. Having longer-running handles is bad, because a commit started at the wrong time could stall for those 20+ milliseconds, which could delay an fsync() or an O_SYNC operation. Here is an example line from the trace file describing a handle which lived on for 311 jiffies, or over 1.2 seconds: postmark-2917 [000] .... 196.435786: jbd2_handle_stats: dev 254,32 tid 570 type 2 line_no 2541 interval 311 sync 0 requested_blocks 1 dirtied_blocks 0 Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* | ext4: return ENOMEM if sb_getblk() failsTheodore Ts'o2013-01-121-1/+1
|/ | | | | | | | | | The only reason for sb_getblk() failing is if it can't allocate the buffer_head. So ENOMEM is more appropriate than EIO. In addition, make sure that the file system is marked as being inconsistent if sb_getblk() fails. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
* ext4: zero out inline data using memset() instead of empty_zero_pageTheodore Ts'o2012-12-111-1/+1
| | | | | | | | | | | | | | Not all architectures (in particular, sparc64) have empty_zero_page. So instead of copying from empty_zero_page, use memset to clear the inline data by signalling to ext4_xattr_set_entry() via a magic pointer value, EXT4_ZERO_ATTR_VALUE, which is defined by casting -1 to a pointer. This fixes a build failure on sparc64, and the memset() should be more efficient than using memcpy() anyway. Signed-off-by: Tao Ma <boyu.mt@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: let fallocate handle inline data correctlyTao Ma2012-12-101-0/+39
| | | | | | | | | If we are punching hole in a file, we will return ENOTSUPP. As for the fallocation of some extents, we will convert the inline data to a normal extent based file first. Signed-off-by: Tao Ma <boyu.mt@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: let ext4_truncate handle inline data correctlyTao Ma2012-12-101-0/+90
| | | | | | Signed-off-by: Robin Dong <sanbai@taobao.com> Signed-off-by: Tao Ma <boyu.mt@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: evict inline data out if we need to strore xattr in inodeTao Ma2012-12-101-5/+43
| | | | | | | | | | Now we that store data in the inode, in case we need to store some xattrs and inode doesn't have enough space, Andreas suggested that we should keep the xattr(metadata) in and data should be pushed out. So this patch does the work. Signed-off-by: Tao Ma <boyu.mt@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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