- 02 10月, 2018 3 次提交
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由 Eric Whitney 提交于
Add new code to count canceled pending cluster reservations on bigalloc file systems and to reduce the cluster reservation count on all file systems using delayed allocation. This replaces old code in ext4_da_page_release_reservations that was incorrect. Signed-off-by: NEric Whitney <enwlinux@gmail.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu>
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由 Eric Whitney 提交于
The code in ext4_da_map_blocks sometimes reserves space for more delayed allocated clusters than it should, resulting in premature ENOSPC, exceeded quota, and inaccurate free space reporting. Fix this by checking for written and unwritten blocks shared in the same cluster with the newly delayed allocated block. A cluster reservation should not be made for a cluster for which physical space has already been allocated. Signed-off-by: NEric Whitney <enwlinux@gmail.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu>
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由 Eric Whitney 提交于
Ext4 contains a few functions that are used to search for delayed extents or blocks in the extents status tree. Rather than duplicate code to add new functions to search for extents with different status values, such as written or a combination of delayed and unwritten, generalize the existing code to search for caller-specified extents status values. Also, move this code into extents_status.c where it is better associated with the data structures it operates upon, and where it can be more readily used to implement new extents status tree functions that might want a broader scope for i_es_lock. Three missing static specifiers in RFC version of patch reported and fixed by Fengguang Wu <fengguang.wu@intel.com>. Signed-off-by: NEric Whitney <enwlinux@gmail.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu>
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- 16 9月, 2018 2 次提交
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由 Toshi Kani 提交于
Sync syscall to DAX file needs to flush processor cache, but it currently does not flush to existing DAX files. This is because 'ext4_da_aops' is set to address_space_operations of existing DAX files, instead of 'ext4_dax_aops', since S_DAX flag is set after ext4_set_aops() in the open path. New file -------- lookup_open ext4_create __ext4_new_inode ext4_set_inode_flags // Set S_DAX flag ext4_set_aops // Set aops to ext4_dax_aops Existing file ------------- lookup_open ext4_lookup ext4_iget ext4_set_aops // Set aops to ext4_da_aops ext4_set_inode_flags // Set S_DAX flag Change ext4_iget() to initialize i_flags before ext4_set_aops(). Fixes: 5f0663bb ("ext4, dax: introduce ext4_dax_aops") Signed-off-by: NToshi Kani <toshi.kani@hpe.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Suggested-by: NJan Kara <jack@suse.cz> Cc: stable@vger.kernel.org
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由 Toshi Kani 提交于
Ext4 mount path calls .bmap to the journal inode. This currently works for the DAX mount case because ext4_iget() always set 'ext4_da_aops' to any regular files. In preparation to fix ext4_iget() to set 'ext4_dax_aops' for ext4 DAX files, add ext4_bmap() to 'ext4_dax_aops', since bmap works for DAX inodes. Fixes: 5f0663bb ("ext4, dax: introduce ext4_dax_aops") Signed-off-by: NToshi Kani <toshi.kani@hpe.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Suggested-by: NJan Kara <jack@suse.cz> Cc: stable@vger.kernel.org
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- 12 9月, 2018 1 次提交
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由 Ross Zwisler 提交于
If the refcount of a page is lowered between the time that it is returned by dax_busy_page() and when the refcount is again checked in ext4_break_layouts() => ___wait_var_event(), the waiting function ext4_wait_dax_page() will never be called. This means that ext4_break_layouts() will still have 'retry' set to false, so we'll stop looping and never check the refcount of other pages in this inode. Instead, always continue looping as long as dax_layout_busy_page() gives us a page which it found with an elevated refcount. Signed-off-by: NRoss Zwisler <ross.zwisler@linux.intel.com> Reviewed-by: NJan Kara <jack@suse.cz> Signed-off-by: NJan Kara <jack@suse.cz> Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Cc: stable@vger.kernel.org
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- 02 9月, 2018 1 次提交
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由 Theodore Ts'o 提交于
A maliciously crafted file system can cause an overflow when the results of a 64-bit calculation is stored into a 32-bit length parameter. https://bugzilla.kernel.org/show_bug.cgi?id=200623Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Reported-by: NWen Xu <wen.xu@gatech.edu> Cc: stable@vger.kernel.org
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- 18 8月, 2018 1 次提交
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由 Jens Axboe 提交于
a_ops->readpages() is only ever used for read-ahead. Ensure that we pass this information down to the block layer. Link: http://lkml.kernel.org/r/20180621010725.17813-5-axboe@kernel.dkSigned-off-by: NJens Axboe <axboe@kernel.dk> Reviewed-by: NAndrew Morton <akpm@linux-foundation.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Chris Mason <clm@fb.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 02 8月, 2018 1 次提交
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由 Liu Song 提交于
Merge the duplicated complex conditions to improve code readability. Signed-off-by: NLiu Song <liu.song11@zte.com.cn> Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Reviewed-by: NJiang Biao <jiang.biao2@zte.com.cn>
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- 30 7月, 2018 2 次提交
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由 Ross Zwisler 提交于
Follow the lead of xfs_break_dax_layouts() and add synchronization between operations in ext4 which remove blocks from an inode (hole punch, truncate down, etc.) and pages which are pinned due to DAX DMA operations. Signed-off-by: NRoss Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Reviewed-by: NJan Kara <jack@suse.cz> Reviewed-by: NLukas Czerner <lczerner@redhat.com>
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由 Arnd Bergmann 提交于
We only care about the low 32-bit for i_dtime as explained in commit b5f51573 ("ext4: avoid Y2038 overflow in recently_deleted()"), so the use of get_seconds() is correct here, but that function is getting removed in the process of the y2038 fixes, so let's use the modern ktime_get_real_seconds() here. Reviewed-by: NAndreas Dilger <adilger@dilger.ca> Signed-off-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NTheodore Ts'o <tytso@mit.edu>
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- 10 7月, 2018 1 次提交
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由 Theodore Ts'o 提交于
The inline data code was updating the raw inode directly; this is problematic since if metadata checksums are enabled, ext4_mark_inode_dirty() must be called to update the inode's checksum. In addition, the jbd2 layer requires that get_write_access() be called before the metadata buffer is modified. Fix both of these problems. https://bugzilla.kernel.org/show_bug.cgi?id=200443Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Cc: stable@vger.kernel.org
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- 17 6月, 2018 1 次提交
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由 Theodore Ts'o 提交于
If there is a directory entry pointing to a system inode (such as a journal inode), complain and declare the file system to be corrupted. Also, if the superblock's first inode number field is too small, refuse to mount the file system. This addresses CVE-2018-10882. https://bugzilla.kernel.org/show_bug.cgi?id=200069Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Cc: stable@kernel.org
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- 16 6月, 2018 1 次提交
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由 Theodore Ts'o 提交于
Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Cc: stable@kernel.org
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- 23 5月, 2018 1 次提交
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由 Theodore Ts'o 提交于
If ext4_find_inline_data_nolock() returns an error it needs to get reflected up to ext4_iget(). In order to fix this, ext4_iget_extra_inode() needs to return an error (and not return void). This is related to "ext4: do not allow external inodes for inline data" (which fixes CVE-2018-11412) in that in the errors=continue case, it would be useful to for userspace to receive an error indicating that file system is corrupted. Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Reviewed-by: NAndreas Dilger <adilger@dilger.ca> Cc: stable@kernel.org
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- 14 5月, 2018 2 次提交
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由 Lukas Czerner 提交于
Currently in ext4_punch_hole we're going to skip the mtime update if there are no actual blocks to release. However we've actually modified the file by zeroing the partial block so the mtime should be updated. Moreover the sync and datasync handling is skipped as well, which is also wrong. Fix it. Signed-off-by: NLukas Czerner <lczerner@redhat.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Reported-by: NJoe Habermann <joe.habermann@quantum.com> Cc: <stable@vger.kernel.org>
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由 Luis R. Rodriguez 提交于
The Linux VFS does not allow a way to set append/immuttable attributes to symlinks, this is just not possible. If this is detected inform the user as the filesystem must be corrupted. Signed-off-by: NLuis R. Rodriguez <mcgrof@kernel.org> Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Reviewed-by: NJan Kara <jack@suse.cz>
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- 10 5月, 2018 1 次提交
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由 Eryu Guan 提交于
Currently, creating large xattr (e.g. 2k) in ea_inode would cause ea_inode refcount corruption, e.g. Pass 4: Checking reference counts Extended attribute inode 13 ref count is 0, should be 1. Fix? no This is because that we save the lower 32bit of refcount in inode->i_version and store it in raw_inode->i_disk_version on disk. But since commit ee73f9a5 ("ext4: convert to new i_version API"), we load/store modified i_disk_version from/to disk instead of raw value, which causes on-disk ea_inode refcount corruption. Fix it by loading/storing raw i_version/i_disk_version, because it's a self-managed value in this case. Fixes: ee73f9a5 ("ext4: convert to new i_version API") Cc: Tahsin Erdogan <tahsin@google.com> Signed-off-by: NEryu Guan <guaneryu@gmail.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu>
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- 31 3月, 2018 1 次提交
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由 Dan Williams 提交于
In preparation for the dax implementation to start associating dax pages to inodes via page->mapping, we need to provide a 'struct address_space_operations' instance for dax. Otherwise, direct-I/O triggers incorrect page cache assumptions and warnings. Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: Andreas Dilger <adilger.kernel@dilger.ca> Cc: linux-ext4@vger.kernel.org Reviewed-by: NJan Kara <jack@suse.cz> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 30 3月, 2018 1 次提交
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由 Theodore Ts'o 提交于
If the root directory has an i_links_count of zero, then when the file system is mounted, then when ext4_fill_super() notices the problem and tries to call iput() the root directory in the error return path, ext4_evict_inode() will try to free the inode on disk, before all of the file system structures are set up, and this will result in an OOPS caused by a NULL pointer dereference. This issue has been assigned CVE-2018-1092. https://bugzilla.kernel.org/show_bug.cgi?id=199179 https://bugzilla.redhat.com/show_bug.cgi?id=1560777Reported-by: NWen Xu <wen.xu@gatech.edu> Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Cc: stable@vger.kernel.org
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- 28 3月, 2018 1 次提交
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由 Christoph Hellwig 提交于
And use it in a few more places rather than opencoding the values. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 26 3月, 2018 1 次提交
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由 Goldwyn Rodrigues 提交于
Code cleanup. Instead of writing an internal static function, use the available generic_writepages(). Signed-off-by: NGoldwyn Rodrigues <rgoldwyn@suse.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu>
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- 22 3月, 2018 4 次提交
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由 Nikolay Borisov 提交于
Commit 16c54688 ("ext4: Allow parallel DIO reads") reworked the way locking happens around parallel dio reads. This resulted in obviating the need for EXT4_STATE_DIOREAD_LOCK flag and accompanying logic. Currently this amounts to dead code so let's remove it. No functional changes Signed-off-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Reviewed-by: NJan Kara <jack@suse.cz>
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由 Jiri Slaby 提交于
ext4_iomap_begin() has a bug where offset returned in the iomap structure will be truncated to unsigned long size. On 64-bit architectures this is fine but on 32-bit architectures obviously not. Not many places actually use the offset stored in the iomap structure but one of visible failures is in SEEK_HOLE / SEEK_DATA implementation. If we create a file like: dd if=/dev/urandom of=file bs=1k seek=8m count=1 then lseek64("file", 0x100000000ULL, SEEK_DATA) wrongly returns 0x100000000 on unfixed kernel while it should return 0x200000000. Avoid the overflow by proper type cast. Fixes: 545052e9 ("ext4: Switch to iomap for SEEK_HOLE / SEEK_DATA") Signed-off-by: NJiri Slaby <jslaby@suse.cz> Signed-off-by: NJan Kara <jack@suse.cz> Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Cc: stable@vger.kernel.org # v4.15
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由 Eryu Guan 提交于
Currently in ext4 direct write path, we update i_disksize only when new eof is greater than i_size, and don't update it even when new eof is greater than i_disksize but less than i_size. This doesn't work well with delalloc buffer write, which updates i_size and i_disksize only when delalloc blocks are resolved (at writeback time), the i_disksize from direct write can be lost if a previous buffer write succeeded at write time but failed at writeback time, then results in corrupted ondisk inode size. Consider this case, first buffer write 4k data to a new file at offset 16k with delayed allocation, then direct write 4k data to the same file at offset 4k before delalloc blocks are resolved, which doesn't update i_disksize because it writes within i_size(20k), but the extent tree metadata has been committed in journal. Then writeback of the delalloc blocks fails (due to device error etc.), and i_size/i_disksize from buffer write can't be written to disk (still zero). A subsequent umount/mount cycle recovers journal and writes extent tree metadata from direct write to disk, but with i_disksize being zero. Fix it by updating i_disksize too in direct write path when new eof is greater than i_disksize but less than i_size, so i_disksize is always consistent with direct write. This fixes occasional i_size corruption in fstests generic/475. Signed-off-by: NEryu Guan <guaneryu@gmail.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu>
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由 Eryu Guan 提交于
i_disksize update should be protected by i_data_sem, by either taking the lock explicitly or by using ext4_update_i_disksize() helper. But the i_disksize updates in ext4_direct_IO_write() are not protected at all, which may be racing with i_disksize updates in writeback path in delalloc buffer write path. This is found by code inspection, and I didn't hit any i_disksize corruption due to this bug. Thanks to Jan Kara for catching this bug and suggesting the fix! Reported-by: NJan Kara <jack@suse.cz> Suggested-by: NJan Kara <jack@suse.cz> Signed-off-by: NEryu Guan <guaneryu@gmail.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Cc: stable@vger.kernel.org
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- 29 1月, 2018 2 次提交
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由 Jeff Layton 提交于
Signed-off-by: NJeff Layton <jlayton@redhat.com> Acked-by: NTheodore Ts'o <tytso@mit.edu>
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由 Jeff Layton 提交于
Add a documentation blob that explains what the i_version field is, how it is expected to work, and how it is currently implemented by various filesystems. We already have inode_inc_iversion. Add several other functions for manipulating and accessing the i_version counter. For now, the implementation is trivial and basically works the way that all of the open-coded i_version accesses work today. Future patches will convert existing users of i_version to use the new API, and then convert the backend implementation to do things more efficiently. Signed-off-by: NJeff Layton <jlayton@redhat.com> Reviewed-by: NJan Kara <jack@suse.cz>
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- 10 1月, 2018 1 次提交
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由 Harshad Shirwadkar 提交于
This patch fixes a race between the shutdown path and bio completion handling. In the ext4 direct io path with async io, after submitting a bio to the block layer, if journal starting fails, ext4_direct_IO_write() would bail out pretending that the IO failed. The caller would have had no way of knowing whether or not the IO was successfully submitted. So instead, we return -EIOCBQUEUED in this case. Now, the caller knows that the IO was submitted. The bio completion handler takes care of the error. Tested: Ran the shutdown xfstest test 461 in loop for over 2 hours across 4 machines resulting in over 400 runs. Verified that the race didn't occur. Usually the race was seen in about 20-30 iterations. Signed-off-by: NHarshad Shirwadkar <harshads@google.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Cc: stable@vger.kernel.org
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- 04 12月, 2017 1 次提交
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由 Andi Kleen 提交于
407cd7fb (ext4: change fast symlink test to not rely on i_blocks) broke ~10 years old ext3 file systems created by 2.6.17. Any ELF executable fails because the /lib/ld-linux.so.2 fast symlink cannot be read anymore. The patch assumed fast symlinks were created in a specific way, but that's not true on these really old file systems. The new behavior is apparently needed only with the large EA inode feature. Revert to the old behavior if the large EA inode feature is not set. This makes my old VM boot again. Fixes: 407cd7fb (ext4: change fast symlink test to not rely on i_blocks) Signed-off-by: NAndi Kleen <ak@linux.intel.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Reviewed-by: NAndreas Dilger <adilger@dilger.ca> Cc: stable@vger.kernel.org
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- 28 11月, 2017 1 次提交
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由 Linus Torvalds 提交于
This is a pure automated search-and-replace of the internal kernel superblock flags. The s_flags are now called SB_*, with the names and the values for the moment mirroring the MS_* flags that they're equivalent to. Note how the MS_xyz flags are the ones passed to the mount system call, while the SB_xyz flags are what we then use in sb->s_flags. The script to do this was: # places to look in; re security/*: it generally should *not* be # touched (that stuff parses mount(2) arguments directly), but # there are two places where we really deal with superblock flags. FILES="drivers/mtd drivers/staging/lustre fs ipc mm \ include/linux/fs.h include/uapi/linux/bfs_fs.h \ security/apparmor/apparmorfs.c security/apparmor/include/lib.h" # the list of MS_... constants SYMS="RDONLY NOSUID NODEV NOEXEC SYNCHRONOUS REMOUNT MANDLOCK \ DIRSYNC NOATIME NODIRATIME BIND MOVE REC VERBOSE SILENT \ POSIXACL UNBINDABLE PRIVATE SLAVE SHARED RELATIME KERNMOUNT \ I_VERSION STRICTATIME LAZYTIME SUBMOUNT NOREMOTELOCK NOSEC BORN \ ACTIVE NOUSER" SED_PROG= for i in $SYMS; do SED_PROG="$SED_PROG -e s/MS_$i/SB_$i/g"; done # we want files that contain at least one of MS_..., # with fs/namespace.c and fs/pnode.c excluded. L=$(for i in $SYMS; do git grep -w -l MS_$i $FILES; done| sort|uniq|grep -v '^fs/namespace.c'|grep -v '^fs/pnode.c') for f in $L; do sed -i $f $SED_PROG; done Requested-by: NAl Viro <viro@zeniv.linux.org.uk> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 16 11月, 2017 3 次提交
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由 Mel Gorman 提交于
Every pagevec_init user claims the pages being released are hot even in cases where it is unlikely the pages are hot. As no one cares about the hotness of pages being released to the allocator, just ditch the parameter. No performance impact is expected as the overhead is marginal. The parameter is removed simply because it is a bit stupid to have a useless parameter copied everywhere. Link: http://lkml.kernel.org/r/20171018075952.10627-6-mgorman@techsingularity.netSigned-off-by: NMel Gorman <mgorman@techsingularity.net> Acked-by: NVlastimil Babka <vbabka@suse.cz> Cc: Andi Kleen <ak@linux.intel.com> Cc: Dave Chinner <david@fromorbit.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Jan Kara <jack@suse.cz> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Jan Kara 提交于
All users of pagevec_lookup() and pagevec_lookup_range() now pass PAGEVEC_SIZE as a desired number of pages. Just drop the argument. Link: http://lkml.kernel.org/r/20171009151359.31984-15-jack@suse.czSigned-off-by: NJan Kara <jack@suse.cz> Reviewed-by: NDaniel Jordan <daniel.m.jordan@oracle.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Jan Kara 提交于
We want only pages from given range in ext4_writepages(). Use pagevec_lookup_range_tag() instead of pagevec_lookup_tag() and remove unnecessary code. Link: http://lkml.kernel.org/r/20171009151359.31984-5-jack@suse.czSigned-off-by: NJan Kara <jack@suse.cz> Reviewed-by: NDaniel Jordan <daniel.m.jordan@oracle.com> Cc: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 14 11月, 2017 1 次提交
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由 Dan Williams 提交于
While reviewing whether MAP_SYNC should strengthen its current guarantee of syncing writes from the initiating process to also include third-party readers observing dirty metadata, Dave pointed out that the check of IOMAP_WRITE is misplaced. The policy of what to with IOMAP_F_DIRTY should be separated from the generic filesystem mechanism of reporting dirty metadata. Move this policy to the fs-dax core to simplify the per-filesystem iomap handlers, and further centralize code that implements the MAP_SYNC policy. This otherwise should not change behavior, it just makes it easier to change behavior in the future. Reviewed-by: NJan Kara <jack@suse.cz> Reviewed-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NDarrick J. Wong <darrick.wong@oracle.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Reported-by: NDave Chinner <david@fromorbit.com> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 03 11月, 2017 1 次提交
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由 Jan Kara 提交于
We return IOMAP_F_DIRTY flag from ext4_iomap_begin() when asked to prepare blocks for writing and the inode has some uncommitted metadata changes. In the fault handler ext4_dax_fault() we then detect this case (through VM_FAULT_NEEDDSYNC return value) and call helper dax_finish_sync_fault() to flush metadata changes and insert page table entry. Note that this will also dirty corresponding radix tree entry which is what we want - fsync(2) will still provide data integrity guarantees for applications not using userspace flushing. And applications using userspace flushing can avoid calling fsync(2) and thus avoid the performance overhead. Reviewed-by: NRoss Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: NJan Kara <jack@suse.cz> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 02 11月, 2017 1 次提交
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由 Greg Kroah-Hartman 提交于
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: NKate Stewart <kstewart@linuxfoundation.org> Reviewed-by: NPhilippe Ombredanne <pombredanne@nexb.com> Reviewed-by: NThomas Gleixner <tglx@linutronix.de> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 19 10月, 2017 2 次提交
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由 Eric Biggers 提交于
Signed-off-by: NEric Biggers <ebiggers@google.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu>
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由 Eric Biggers 提交于
Introduce a flag S_ENCRYPTED which can be set in ->i_flags to indicate that the inode is encrypted using the fscrypt (fs/crypto/) mechanism. Checking this flag will give the same information that inode->i_sb->s_cop->is_encrypted(inode) currently does, but will be more efficient. This will be useful for adding higher-level helper functions for filesystems to use. For example we'll be able to replace this: if (ext4_encrypted_inode(inode)) { ret = fscrypt_get_encryption_info(inode); if (ret) return ret; if (!fscrypt_has_encryption_key(inode)) return -ENOKEY; } with this: ret = fscrypt_require_key(inode); if (ret) return ret; ... since we'll be able to retain the fast path for unencrypted files as a single flag check, using an inline function. This wasn't possible before because we'd have had to frequently call through the ->i_sb->s_cop->is_encrypted function pointer, even when the encryption support was disabled or not being used. Note: we don't define S_ENCRYPTED to 0 if CONFIG_FS_ENCRYPTION is disabled because we want to continue to return an error if an encrypted file is accessed without encryption support, rather than pretending that it is unencrypted. Reviewed-by: NChao Yu <yuchao0@huawei.com> Acked-by: NDave Chinner <dchinner@redhat.com> Signed-off-by: NEric Biggers <ebiggers@google.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu>
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- 13 10月, 2017 1 次提交
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由 Ross Zwisler 提交于
This helper, in the spirit of ext4_should_dioread_nolock() et al., replaces the complex conditional in ext4_set_inode_flags(). Signed-off-by: NRoss Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Reviewed-by: NJan Kara <jack@suse.cz>
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