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2016-03-17fs crypto: move per-file encryption from f2fs tree to fs/cryptoJaegeuk Kim1-4/+1
This patch adds the renamed functions moved from the f2fs crypto files. 1. definitions for per-file encryption used by ext4 and f2fs. 2. crypto.c for encrypt/decrypt functions a. IO preparation: - fscrypt_get_ctx / fscrypt_release_ctx b. before IOs: - fscrypt_encrypt_page - fscrypt_decrypt_page - fscrypt_zeroout_range c. after IOs: - fscrypt_decrypt_bio_pages - fscrypt_pullback_bio_page - fscrypt_restore_control_page 3. policy.c supporting context management. a. For ioctls: - fscrypt_process_policy - fscrypt_get_policy b. For context permission - fscrypt_has_permitted_context - fscrypt_inherit_context 4. keyinfo.c to handle permissions - fscrypt_get_encryption_info - fscrypt_free_encryption_info 5. fname.c to support filename encryption a. general wrapper functions - fscrypt_fname_disk_to_usr - fscrypt_fname_usr_to_disk - fscrypt_setup_filename - fscrypt_free_filename b. specific filename handling functions - fscrypt_fname_alloc_buffer - fscrypt_fname_free_buffer 6. Makefile and Kconfig Cc: Al Viro <viro@ftp.linux.org.uk> Signed-off-by: Michael Halcrow <mhalcrow@google.com> Signed-off-by: Ildar Muslukhov <ildarm@google.com> Signed-off-by: Uday Savagaonkar <savagaon@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-02-22f2fs: split drop_inmem_pages from commit_inmem_pagesChao Yu1-1/+1
Split drop_inmem_pages from commit_inmem_pages for code readability, and prepare for the following modification. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-02-22f2fs: use wait_for_stable_page to avoid contentionJaegeuk Kim1-2/+2
In write_begin, if storage supports stable_page, we don't need to wait for writeback to update its contents. This patch introduces to use wait_for_stable_page instead of wait_on_page_writeback. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-02-22f2fs: avoid multiple node page writes due to inline_dataJaegeuk Kim1-0/+4
The sceanrio is: 1. create fully node blocks 2. flush node blocks 3. write inline_data for all the node blocks again 4. flush node blocks redundantly So, this patch tries to flush inline_data when flushing node blocks. Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-01-13Merge tag 'for-f2fs-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fsLinus Torvalds1-13/+15
Pull f2fs updates from Jaegeuk Kim: "This series adds two ioctls to control cached data and fragmented files. Most of the rest fixes missing error cases and bugs that we have not covered so far. Summary: Enhancements: - support an ioctl to execute online file defragmentation - support an ioctl to flush cached data - speed up shrinking of extent_cache entries - handle broken superblock - refector dirty inode management infra - revisit f2fs_map_blocks to handle more cases - reduce global lock coverage - add detecting user's idle time Major bug fixes: - fix data race condition on cached nat entries - fix error cases of volatile and atomic writes" * tag 'for-f2fs-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (87 commits) f2fs: should unset atomic flag after successful commit f2fs: fix wrong memory condition check f2fs: monitor the number of background checkpoint f2fs: detect idle time depending on user behavior f2fs: introduce time and interval facility f2fs: skip releasing nodes in chindless extent tree f2fs: use atomic type for node count in extent tree f2fs: recognize encrypted data in f2fs_fiemap f2fs: clean up f2fs_balance_fs f2fs: remove redundant calls f2fs: avoid unnecessary f2fs_balance_fs calls f2fs: check the page status filled from disk f2fs: introduce __get_node_page to reuse common code f2fs: check node id earily when readaheading node page f2fs: read isize while holding i_mutex in fiemap Revert "f2fs: check the node block address of newly allocated nid" f2fs: cover more area with nat_tree_lock f2fs: introduce max_file_blocks in sbi f2fs crypto: check CONFIG_F2FS_FS_XATTR for encrypted symlink f2fs: introduce zombie list for fast shrinking extent trees ...
2016-01-08f2fs: clean up f2fs_balance_fsJaegeuk Kim1-1/+1
This patch adds one parameter to clean up all the callers of f2fs_balance_fs. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-01-08f2fs: avoid unnecessary f2fs_balance_fs callsJaegeuk Kim1-9/+10
Only when node page is newly dirtied, it needs to check whether we need to do f2fs_gc. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-30f2fs: load largest extent all the timeJaegeuk Kim1-1/+2
Otherwise, we can get mismatched largest extent information. One example is: 1. mount f2fs w/ extent_cache 2. make a small extent 3. umount 4. mount f2fs w/o extent_cache 5. update the largest extent 6. umount 7. mount f2fs w/ extent_cache 8. get the old extent made by #2 Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-16f2fs: record dirty status of regular/symlink inodeChao Yu1-1/+1
Maintain regular/symlink inode which has dirty pages in global dirty list and record their total dirty pages count like the way of handling directory inode. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-15f2fs: rename {add,remove,release}_dirty_inode to {add,remove,release}_ino_entryChao Yu1-2/+2
remove_dirty_dir_inode will be renamed to remove_dirty_inode as a generic function in following patch for removing directory/regular/symlink inode in global dirty list. Here rename ino management related functions for readability, also in order to avoid name conflict. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-08don't put symlink bodies in pagecache into highmemAl Viro1-0/+1
kmap() in page_follow_link_light() needed to go - allowing to hold an arbitrary number of kmaps for long is a great way to deadlocking the system. new helper (inode_nohighmem(inode)) needs to be used for pagecache symlinks inodes; done for all in-tree cases. page_follow_link_light() instrumented to yell about anything missed. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-10-09f2fs: no need to lock for update_inode_page all the timeJaegeuk Kim1-6/+2
As comment says, we don't need to call f2fs_lock_op in write_inode to prevent from producing dirty node pages all the time. That happens only when there is not enough free sections and we can avoid that by calling balance_fs in prior to that. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-08-24f2fs: fix to release inode correctlyChao Yu1-7/+46
In following call stack, if unfortunately we lose all chances to truncate inode page in remove_inode_page, eventually we will add the nid allocated previously into free nid cache, this nid is with NID_NEW status and with NEW_ADDR in its blkaddr pointer: - f2fs_create - f2fs_add_link - __f2fs_add_link - init_inode_metadata - new_inode_page - new_node_page - set_node_addr(, NEW_ADDR) - f2fs_init_acl failed - remove_inode_page failed - handle_failed_inode - remove_inode_page failed - iput - f2fs_evict_inode - remove_inode_page failed - alloc_nid_failed cache a nid with valid blkaddr: NEW_ADDR This may not only cause resource leak of previous inode, but also may cause incorrect use of the previous blkaddr which is located in NO.nid node entry when this nid is reused by others. This patch tries to add this inode to orphan list if we fail to truncate inode, so that we can obtain a second chance to release it in orphan recovery flow. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-08-24f2fs: atomically set inode->i_flagsZhang Zhen1-3/+2
According to commit 5f16f3225b06 ("ext4: atomically set inode->i_flags in ext4_set_inode_flags()"). Signed-off-by: Zhang Zhen <zhenzhang.zhang@huawei.com> Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-08-05f2fs: fix inline data/dentry stat number leakChao Yu1-2/+0
If we clear inline data/dentry flag in handle_failed_inode, we will fail to decline the stat count of inline data/dentry in f2fs_evict_inode due to no flag in inode. So remove the wrong clearing. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-08-05f2fs: fix double lock in handle_failed_inodeChao Yu1-2/+2
In handle_failed_inode, there is a potential deadlock which can happen in below call path: - f2fs_create - f2fs_lock_op down_read(cp_rwsem) - f2fs_add_link - __f2fs_add_link - init_inode_metadata - f2fs_init_security failed - truncate_blocks failed - handle_failed_inode - f2fs_truncate - truncate_blocks(..,true) - write_checkpoint - block_operations - f2fs_lock_all down_write(cp_rwsem) - f2fs_lock_op down_read(cp_rwsem) So in this path, we pass parameter to f2fs_truncate to make sure cp_rwsem in truncate_blocks will not be locked again. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-08-05f2fs: stat inline xattr inode numberChao Yu1-0/+2
This patch adds to stat the number of inline xattr inode for showing in debugfs. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-08-04f2fs: use extent_cache by defaultJaegeuk Kim1-10/+8
We don't need to handle the duplicate extent information. The integrated rule is: - update on-disk extent with largest one tracked by in-memory extent_cache - destroy extent_tree for the truncation case - drop per-inode extent_cache by shrinker Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-08-04f2fs: avoid to use failed inode immediatelyJaegeuk Kim1-7/+12
Before iput is called, the inode number used by a bad inode can be reassigned to other new inode, resulting in any abnormal behaviors on the new inode. This should not happen for the new inode. Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-06-01f2fs crypto: use per-inode tfm structureJaegeuk Kim1-1/+1
This patch applies the following ext4 patch: ext4 crypto: use per-inode tfm structure As suggested by Herbert Xu, we shouldn't allocate a new tfm each time we read or write a page. Instead we can use a single tfm hanging off the inode's crypt_info structure for all of our encryption needs for that inode, since the tfm can be used by multiple crypto requests in parallel. Also use cmpxchg() to avoid races that could result in crypt_info structure getting doubly allocated or doubly freed. Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-05-28f2fs crypto: add symlink encryptionJaegeuk Kim1-1/+4
This patch implements encryption support for symlink. Signed-off-by: Uday Savagaonkar <savagaon@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-05-28f2fs crypto: activate encryption support for fs APIsJaegeuk Kim1-0/+4
This patch activates the following APIs for encryption support. The rules quoted by ext4 are: - An unencrypted directory may contain encrypted or unencrypted files or directories. - All files or directories in a directory must be protected using the same key as their containing directory. - Encrypted inode for regular file should not have inline_data. - Encrypted symlink and directory may have inline_data and inline_dentry. This patch activates the following APIs. 1. f2fs_link : validate context 2. f2fs_lookup : '' 3. f2fs_rename : '' 4. f2fs_create/f2fs_mkdir : inherit its dir's context 5. f2fs_direct_IO : do buffered io for regular files 6. f2fs_open : check encryption info 7. f2fs_file_mmap : '' 8. f2fs_setattr : '' 9. f2fs_file_write_iter : '' (Called by sys_io_submit) 10. f2fs_fallocate : do not support fcollapse 11. f2fs_evict_inode : free_encryption_info Signed-off-by: Michael Halcrow <mhalcrow@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-04-10f2fs: fix sparse warningsJaegeuk Kim1-1/+3
This patch fixes the below warning. sparse warnings: (new ones prefixed by >>) >> fs/f2fs/inode.c:56:23: sparse: restricted __le32 degrades to integer >> fs/f2fs/inode.c:56:52: sparse: restricted __le32 degrades to integer Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-04-10f2fs: preserve extent info for extent cacheChao Yu1-0/+5
This patch tries to preserve last extent info in extent tree cache into on-disk inode, so this can help us to reuse the last extent info next time for performance. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-04-10f2fs: initialize extent tree with on-disk extent info of inodeChao Yu1-3/+1
With normal extent info cache, we records largest extent mapping between logical block and physical block into extent info, and we persist extent info in on-disk inode. When we enable extent tree cache, if extent info of on-disk inode is exist, and the extent is not a small fragmented mapping extent. We'd better to load the extent info into extent tree cache when inode is loaded. By this way we can have more chance to hit extent tree cache rather than taking more time to read dnode page for block address. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-04-10f2fs: avoid punch_hole overhead when releasing volatile dataJaegeuk Kim1-0/+10
This patch is to avoid some punch_hole overhead when releasing volatile data. If volatile data was not written yet, we just can make the first page as zero. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-03-03f2fs: enable rb-tree extent cacheChao Yu1-0/+1
This patch enables rb-tree based extent cache in f2fs. When we mount with "-o extent_cache", f2fs will try to add recently accessed page-block mappings into rb-tree based extent cache as much as possible, instead of original one extent info cache. By this way, f2fs can support more effective cache between dnode page cache and disk. It will supply high hit ratio in the cache with fewer memory when dnode page cache are reclaimed in environment of low memory. Storage: Sandisk sd card 64g 1.append write file (offset: 0, size: 128M); 2.override write file (offset: 2M, size: 1M); 3.override write file (offset: 4M, size: 1M); ... 4.override write file (offset: 48M, size: 1M); ... 5.override write file (offset: 112M, size: 1M); 6.sync 7.echo 3 > /proc/sys/vm/drop_caches 8.read file (size:128M, unit: 4k, count: 32768) (time dd if=/mnt/f2fs/128m bs=4k count=32768) Extent Hit Ratio: before patched Hit Ratio 121 / 1071 1071 / 1071 Performance: before patched real 0m37.051s 0m35.556s user 0m0.040s 0m0.026s sys 0m2.990s 0m2.251s Memory Cost: before patched Tree Count: 0 1 (size: 24 bytes) Node Count: 0 45 (size: 1440 bytes) v3: o retest and given more details of test result. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-03-03f2fs: move ext_lock out of struct extent_infoChao Yu1-0/+7
Move ext_lock out of struct extent_info, then in the following patches we can use variables with struct extent_info type as a parameter to pass pure data. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-01-09f2fs: get rid of kzalloc in __recover_inline_statusChao Yu1-21/+14
We use kzalloc to allocate memory in __recover_inline_status, and use this all-zero memory to check the inline date content of inode page by comparing them. This is low effective and not needed, let's check inline date content directly. Signed-off-by: Chao Yu <chao2.yu@samsung.com> [Jaegeuk Kim: make the code more neat] Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-01-09f2fs: change atomic and volatile write policiesJaegeuk Kim1-1/+1
This patch adds two new ioctls to release inmemory pages grabbed by atomic writes. o f2fs_ioc_abort_volatile_write - If transaction was failed, all the grabbed pages and data should be written. o f2fs_ioc_release_volatile_write - This is to enhance the performance of PERSIST mode in sqlite. In order to avoid huge memory consumption which causes OOM, this patch changes volatile writes to use normal dirty pages, instead blocked flushing to the disk as long as system does not suffer from memory pressure. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-12-08f2fs: count inline_xx in do_read_inodeJaegeuk Kim1-2/+4
In do_read_inode, if we failed __recover_inline_status, the inode has inline flag without increasing its count. Later, f2fs_evict_inode will decrease the count, which causes -1. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-11-04f2fs: revisit inline_data to avoid data races and potential bugsJaegeuk Kim1-1/+32
This patch simplifies the inline_data usage with the following rule. 1. inline_data is set during the file creation. 2. If new data is requested to be written ranges out of inline_data, f2fs converts that inode permanently. 3. There is no cases which converts non-inline_data inode to inline_data. 4. The inline_data flag should be changed under inode page lock. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-11-03f2fs: fix counting inline_data inode numbersJaegeuk Kim1-2/+2
This patch fixes wrongly counting inline_data inode numbers. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-11-03f2fs: add stat info for inline_dentry inodesJaegeuk Kim1-0/+3
This patch adds status information for inline_dentry inodes. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-11-03f2fs: use highmem for directory pagesJaegeuk Kim1-1/+1
This patch fixes to use highmem for directory pages. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-10-07f2fs: support volatile operations for transient dataJaegeuk Kim1-1/+1
This patch adds support for volatile writes which keep data pages in memory until f2fs_evict_inode is called by iput. For instance, we can use this feature for the sqlite database as follows. While supporting atomic writes for main database file, we can keep its journal data temporarily in the page cache by the following sequence. 1. open -> ioctl(F2FS_IOC_START_VOLATILE_WRITE); 2. writes : keep all the data in the page cache. 3. flush to the database file with atomic writes a. ioctl(F2FS_IOC_START_ATOMIC_WRITE); b. writes c. ioctl(F2FS_IOC_COMMIT_ATOMIC_WRITE); 4. close -> drop the cached data Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-10-06f2fs: support atomic writesJaegeuk Kim1-0/+4
This patch introduces a very limited functionality for atomic write support. In order to support atomic write, this patch adds two ioctls: o F2FS_IOC_START_ATOMIC_WRITE o F2FS_IOC_COMMIT_ATOMIC_WRITE The database engine should be aware of the following sequence. 1. open -> ioctl(F2FS_IOC_START_ATOMIC_WRITE); 2. writes : all the written data will be treated as atomic pages. 3. commit -> ioctl(F2FS_IOC_COMMIT_ATOMIC_WRITE); : this flushes all the data blocks to the disk, which will be shown all or nothing by f2fs recovery procedure. 4. repeat to #2. The IO pattens should be: ,- START_ATOMIC_WRITE ,- COMMIT_ATOMIC_WRITE CP | D D D D D D | FSYNC | D D D D | FSYNC ... `- COMMIT_ATOMIC_WRITE Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-09-30f2fs: call f2fs_unlock_op after error was handledJaegeuk Kim1-0/+23
This patch relocates f2fs_unlock_op in every directory operations to be called after any error was processed. Otherwise, the checkpoint can be entered with valid node ids without its dentry when -ENOSPC is occurred. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-09-16f2fs: expand counting dirty pages in the inode page cacheJaegeuk Kim1-1/+1
Previously f2fs only counts dirty dentry pages, but there is no reason not to expand the scope. This patch changes the names on the management of dirty pages and to count dirty pages in each inode info as well. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-09-09f2fs: need fsck.f2fs when f2fs_bug_on is triggeredJaegeuk Kim1-1/+1
If any f2fs_bug_on is triggered, fsck.f2fs is needed. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-09-03f2fs: introduce F2FS_I_SB, F2FS_M_SB, and F2FS_P_SBJaegeuk Kim1-4/+4
This patch adds three inline functions to clean up dirty casting codes. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-08-04f2fs: invalidate xattr node page when evict inodeChao Yu1-0/+3
When inode is evicted, all the page cache belong to this inode should be released including the xattr node page. But previously we didn't do this, this patch fixed this issue. v2: o reposition invalidate_mapping_pages() to the right place suggested by Jaegeuk Kim. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-07-29f2fs: add info of appended or updated data writesJaegeuk Kim1-0/+4
This patch introduces a inode number list in which represents inodes having appended data writes or updated data writes after last checkpoint. This will be used at fsync to determine whether the recovery information should be written or not. Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-07-25f2fs: avoid use invalid mapping of node_inode when evict meta inodeChao Yu1-2/+3
Andrey Tsyvarev reported: "Using memory error detector reveals the following use-after-free error in 3.15.0: AddressSanitizer: heap-use-after-free in f2fs_evict_inode Read of size 8 by thread T22279: [<ffffffffa02d8702>] f2fs_evict_inode+0x102/0x2e0 [f2fs] [<ffffffff812359af>] evict+0x15f/0x290 [< inlined >] iput+0x196/0x280 iput_final [<ffffffff812369a6>] iput+0x196/0x280 [<ffffffffa02dc416>] f2fs_put_super+0xd6/0x170 [f2fs] [<ffffffff81210095>] generic_shutdown_super+0xc5/0x1b0 [<ffffffff812105fd>] kill_block_super+0x4d/0xb0 [<ffffffff81210a86>] deactivate_locked_super+0x66/0x80 [<ffffffff81211c98>] deactivate_super+0x68/0x80 [<ffffffff8123cc88>] mntput_no_expire+0x198/0x250 [< inlined >] SyS_umount+0xe9/0x1a0 SYSC_umount [<ffffffff8123f1c9>] SyS_umount+0xe9/0x1a0 [<ffffffff81cc8df9>] system_call_fastpath+0x16/0x1b Freed by thread T3: [<ffffffffa02dc337>] f2fs_i_callback+0x27/0x30 [f2fs] [< inlined >] rcu_process_callbacks+0x2d6/0x930 __rcu_reclaim [< inlined >] rcu_process_callbacks+0x2d6/0x930 rcu_do_batch [< inlined >] rcu_process_callbacks+0x2d6/0x930 invoke_rcu_callbacks [< inlined >] rcu_process_callbacks+0x2d6/0x930 __rcu_process_callbacks [<ffffffff810fd266>] rcu_process_callbacks+0x2d6/0x930 [<ffffffff8107cce2>] __do_softirq+0x142/0x380 [<ffffffff8107cf50>] run_ksoftirqd+0x30/0x50 [<ffffffff810b2a87>] smpboot_thread_fn+0x197/0x280 [<ffffffff810a8238>] kthread+0x148/0x160 [<ffffffff81cc8d4c>] ret_from_fork+0x7c/0xb0 Allocated by thread T22276: [<ffffffffa02dc7dd>] f2fs_alloc_inode+0x2d/0x170 [f2fs] [<ffffffff81235e2a>] iget_locked+0x10a/0x230 [<ffffffffa02d7495>] f2fs_iget+0x35/0xa80 [f2fs] [<ffffffffa02e2393>] f2fs_fill_super+0xb53/0xff0 [f2fs] [<ffffffff81211bce>] mount_bdev+0x1de/0x240 [<ffffffffa02dbce0>] f2fs_mount+0x10/0x20 [f2fs] [<ffffffff81212a85>] mount_fs+0x55/0x220 [<ffffffff8123c026>] vfs_kern_mount+0x66/0x200 [< inlined >] do_mount+0x2b4/0x1120 do_new_mount [<ffffffff812400d4>] do_mount+0x2b4/0x1120 [< inlined >] SyS_mount+0xb2/0x110 SYSC_mount [<ffffffff812414a2>] SyS_mount+0xb2/0x110 [<ffffffff81cc8df9>] system_call_fastpath+0x16/0x1b The buggy address ffff8800587866c8 is located 48 bytes inside of 680-byte region [ffff880058786698, ffff880058786940) Memory state around the buggy address: ffff880058786100: ffffffff ffffffff ffffffff ffffffff ffff880058786200: ffffffff ffffffff ffffffrr rrrrrrrr ffff880058786300: rrrrrrrr rrffffff ffffffff ffffffff ffff880058786400: ffffffff ffffffff ffffffff ffffffff ffff880058786500: ffffffff ffffffff ffffffff fffffffr >ffff880058786600: rrrrrrrr rrrrrrrr rrrfffff ffffffff ^ ffff880058786700: ffffffff ffffffff ffffffff ffffffff ffff880058786800: ffffffff ffffffff ffffffff ffffffff ffff880058786900: ffffffff rrrrrrrr rrrrrrrr rrrr.... ffff880058786a00: ........ ........ ........ ........ ffff880058786b00: ........ ........ ........ ........ Legend: f - 8 freed bytes r - 8 redzone bytes . - 8 allocated bytes x=1..7 - x allocated bytes + (8-x) redzone bytes Investigation shows, that f2fs_evict_inode, when called for 'meta_inode', uses invalidate_mapping_pages() for 'node_inode'. But 'node_inode' is deleted before 'meta_inode' in f2fs_put_super via iput(). It seems that in common usage scenario this use-after-free is benign, because 'node_inode' remains partially valid data even after kmem_cache_free(). But things may change if, while 'meta_inode' is evicted in one f2fs filesystem, another (mounted) f2fs filesystem requests inode from cache, and formely 'node_inode' of the first filesystem is returned." Nids for both meta_inode and node_inode are reservation, so it's not necessary for us to invalidate pages which will never be allocated. To fix this issue, let's skipping needlessly invalidating pages for {meta,node}_inode in f2fs_evict_inode. Reported-by: Andrey Tsyvarev <tsyvarev@ispras.ru> Tested-by: Andrey Tsyvarev <tsyvarev@ispras.ru> Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-07-09f2fs: check lower bound nid value in check_nid_rangeChao Yu1-0/+1
This patch add lower bound verification for nid in check_nid_range, so nids reserved like 0, node, meta passed by caller could be checked there. And then check_nid_range could be used in f2fs_nfs_get_inode for simplifying code. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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: 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>
2014-04-07Merge tag 'for-f2fs-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fsLinus Torvalds1-10/+17
Pull f2fs updates from Jaegeuk Kim: "This patch-set includes the following major enhancement patches. - introduce large directory support - introduce f2fs_issue_flush to merge redundant flush commands - merge write IOs as much as possible aligned to the segment - add sysfs entries to tune the f2fs configuration - use radix_tree for the free_nid_list to reduce in-memory operations - remove costly bit operations in f2fs_find_entry - enhance the readahead flow for CP/NAT/SIT/SSA blocks The other bug fixes are as follows: - recover xattr node blocks correctly after sudden-power-cut - fix to calculate the maximum number of node ids - enhance to handle many error cases And, there are a bunch of cleanups" * tag 'for-f2fs-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (62 commits) f2fs: fix wrong statistics of inline data f2fs: check the acl's validity before setting f2fs: introduce f2fs_issue_flush to avoid redundant flush issue f2fs: fix to cover io->bio with io_rwsem f2fs: fix error path when fail to read inline data f2fs: use list_for_each_entry{_safe} for simplyfying code f2fs: avoid free slab cache under spinlock f2fs: avoid unneeded lookup when xattr name length is too long f2fs: avoid unnecessary bio submit when wait page writeback f2fs: return -EIO when node id is not matched f2fs: avoid RECLAIM_FS-ON-W warning f2fs: skip unnecessary node writes during fsync f2fs: introduce fi->i_sem to protect fi's info f2fs: change reclaim rate in percentage f2fs: add missing documentation for dir_level f2fs: remove unnecessary threshold f2fs: throttle the memory footprint with a sysfs entry f2fs: avoid to drop nat entries due to the negative nr_shrink f2fs: call f2fs_wait_on_page_writeback instead of native function f2fs: introduce nr_pages_to_write for segment alignment ...
2014-04-03mm + fs: store shadow entries in page cacheJohannes Weiner1-1/+1
Reclaim will be leaving shadow entries in the page cache radix tree upon evicting the real page. As those pages are found from the LRU, an iput() can lead to the inode being freed concurrently. At this point, reclaim must no longer install shadow pages because the inode freeing code needs to ensure the page tree is really empty. Add an address_space flag, AS_EXITING, that the inode freeing code sets under the tree lock before doing the final truncate. Reclaim will check for this flag before installing shadow pages. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Reviewed-by: Rik van Riel <riel@redhat.com> Reviewed-by: Minchan Kim <minchan@kernel.org> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Bob Liu <bob.liu@oracle.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Dave Chinner <david@fromorbit.com> Cc: Greg Thelen <gthelen@google.com> Cc: Hugh Dickins <hughd@google.com> Cc: Jan Kara <jack@suse.cz> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Luigi Semenzato <semenzato@google.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Metin Doslu <metin@citusdata.com> Cc: Michel Lespinasse <walken@google.com> Cc: Ozgun Erdogan <ozgun@citusdata.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Roman Gushchin <klamm@yandex-team.ru> Cc: Ryan Mallon <rmallon@gmail.com> Cc: Tejun Heo <tj@kernel.org> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-03-18f2fs: introduce get_dirty_dents for readabilityJaegeuk Kim1-1/+1
The get_dirty_dents gives us the number of dirty dentry pages. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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