License cleanup: add SPDX GPL-2.0 license identifier to files with no license
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: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 15:07:57 +01:00
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2006-10-11 01:20:53 -07:00
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2008-02-15 14:37:46 -08:00
|
|
|
|
2009-06-17 19:24:03 -04:00
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
2017-11-08 22:23:20 -05:00
|
|
|
|
2016-12-24 11:46:01 -08:00
|
|
|
|
2017-02-05 19:47:14 -05:00
|
|
|
|
2018-01-09 08:21:39 -05:00
|
|
|
|
2021-04-07 14:36:43 +02:00
|
|
|
|
2022-07-21 15:44:22 -07:00
|
|
|
|
2008-04-29 18:13:32 -04:00
|
|
|
|
|
|
|
|
|
2017-04-30 00:36:53 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2021-12-13 14:56:18 +01:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2022-07-21 15:44:22 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2021-12-13 14:56:18 +01:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ext4: update the backup superblock's at the end of the online resize
When expanding a file system using online resize, various fields in
the superblock (e.g., s_blocks_count, s_inodes_count, etc.) change.
To update the backup superblocks, the online resize uses the function
update_backups() in fs/ext4/resize.c. This function was not updating
the checksum field in the backup superblocks. This wasn't a big deal
previously, because e2fsck didn't care about the checksum field in the
backup superblock. (And indeed, update_backups() goes all the way
back to the ext3 days, well before we had support for metadata
checksums.)
However, there is an alternate, more general way of updating
superblock fields, ext4_update_primary_sb() in fs/ext4/ioctl.c. This
function does check the checksum of the backup superblock, and if it
doesn't match will mark the file system as corrupted. That was
clearly not the intent, so avoid to aborting the resize when a bad
superblock is found.
In addition, teach update_backups() to properly update the checksum in
the backup superblocks. We will eventually want to unify
updapte_backups() with the infrasture in ext4_update_primary_sb(), but
that's for another day.
Note: The problem has been around for a while; it just didn't really
matter until ext4_update_primary_sb() was added by commit bbc605cdb1e1
("ext4: implement support for get/set fs label"). And it became
trivially easy to reproduce after commit 827891a38acc ("ext4: update
the s_overhead_clusters in the backup sb's when resizing") in v6.0.
Cc: stable@kernel.org # 5.17+
Fixes: bbc605cdb1e1 ("ext4: implement support for get/set fs label")
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2022-10-27 16:04:36 -04:00
|
|
|
|
2021-12-13 14:56:18 +01:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2022-03-12 21:39:35 -05:00
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2015-06-12 23:46:33 -04:00
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2022-03-12 21:39:35 -05:00
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2019-02-11 00:35:06 -05:00
|
|
|
|
2023-10-04 14:52:20 -04:00
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2017-07-31 00:55:34 -04:00
|
|
|
|
2023-10-04 14:52:20 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
|
|
|
|
|
2019-02-11 00:35:06 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2017-07-31 00:55:34 -04:00
|
|
|
|
2013-08-12 09:29:30 -04:00
|
|
|
|
|
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2020-10-15 13:37:59 -07:00
|
|
|
|
2018-10-02 18:21:19 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2022-03-12 21:39:35 -05:00
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2023-01-13 12:49:26 +01:00
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2023-01-13 12:49:26 +01:00
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2019-02-11 00:14:02 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
2022-10-26 12:23:09 +08:00
|
|
|
|
|
|
|
|
|
2014-02-17 20:44:36 -05:00
|
|
|
|
|
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2012-04-18 15:16:33 -04:00
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
2019-02-11 00:02:05 -05:00
|
|
|
|
|
|
|
|
|
2019-02-11 01:07:10 -05:00
|
|
|
|
2019-02-11 00:02:05 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2023-01-13 12:49:26 +01:00
|
|
|
|
2021-01-21 14:19:25 +01:00
|
|
|
|
2019-02-11 00:02:05 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2021-02-04 18:05:42 +01:00
|
|
|
|
2019-02-11 00:05:24 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2018-10-02 18:21:19 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2019-02-11 00:05:24 -05:00
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
2022-01-17 17:36:54 +08:00
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ext4: fix bug_on in __es_tree_search caused by bad boot loader inode
We got a issue as fllows:
==================================================================
kernel BUG at fs/ext4/extents_status.c:203!
invalid opcode: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 945 Comm: cat Not tainted 6.0.0-next-20221007-dirty #349
RIP: 0010:ext4_es_end.isra.0+0x34/0x42
RSP: 0018:ffffc9000143b768 EFLAGS: 00010203
RAX: 0000000000000000 RBX: ffff8881769cd0b8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8fc27cf7 RDI: 00000000ffffffff
RBP: ffff8881769cd0bc R08: 0000000000000000 R09: ffffc9000143b5f8
R10: 0000000000000001 R11: 0000000000000001 R12: ffff8881769cd0a0
R13: ffff8881768e5668 R14: 00000000768e52f0 R15: 0000000000000000
FS: 00007f359f7f05c0(0000)GS:ffff88842fd00000(0000)knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f359f5a2000 CR3: 000000017130c000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__es_tree_search.isra.0+0x6d/0xf5
ext4_es_cache_extent+0xfa/0x230
ext4_cache_extents+0xd2/0x110
ext4_find_extent+0x5d5/0x8c0
ext4_ext_map_blocks+0x9c/0x1d30
ext4_map_blocks+0x431/0xa50
ext4_mpage_readpages+0x48e/0xe40
ext4_readahead+0x47/0x50
read_pages+0x82/0x530
page_cache_ra_unbounded+0x199/0x2a0
do_page_cache_ra+0x47/0x70
page_cache_ra_order+0x242/0x400
ondemand_readahead+0x1e8/0x4b0
page_cache_sync_ra+0xf4/0x110
filemap_get_pages+0x131/0xb20
filemap_read+0xda/0x4b0
generic_file_read_iter+0x13a/0x250
ext4_file_read_iter+0x59/0x1d0
vfs_read+0x28f/0x460
ksys_read+0x73/0x160
__x64_sys_read+0x1e/0x30
do_syscall_64+0x35/0x80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
</TASK>
==================================================================
In the above issue, ioctl invokes the swap_inode_boot_loader function to
swap inode<5> and inode<12>. However, inode<5> contain incorrect imode and
disordered extents, and i_nlink is set to 1. The extents check for inode in
the ext4_iget function can be bypassed bacause 5 is EXT4_BOOT_LOADER_INO.
While links_count is set to 1, the extents are not initialized in
swap_inode_boot_loader. After the ioctl command is executed successfully,
the extents are swapped to inode<12>, in this case, run the `cat` command
to view inode<12>. And Bug_ON is triggered due to the incorrect extents.
When the boot loader inode is not initialized, its imode can be one of the
following:
1) the imode is a bad type, which is marked as bad_inode in ext4_iget and
set to S_IFREG.
2) the imode is good type but not S_IFREG.
3) the imode is S_IFREG.
The BUG_ON may be triggered by bypassing the check in cases 1 and 2.
Therefore, when the boot loader inode is bad_inode or its imode is not
S_IFREG, initialize the inode to avoid triggering the BUG.
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20221026042310.3839669-5-libaokun1@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
2022-10-26 12:23:10 +08:00
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2018-01-09 08:21:39 -05:00
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
ext4: zero i_disksize when initializing the bootloader inode
If the boot loader inode has never been used before, the
EXT4_IOC_SWAP_BOOT inode will initialize it, including setting the
i_size to 0. However, if the "never before used" boot loader has a
non-zero i_size, then i_disksize will be non-zero, and the
inconsistency between i_size and i_disksize can trigger a kernel
warning:
WARNING: CPU: 0 PID: 2580 at fs/ext4/file.c:319
CPU: 0 PID: 2580 Comm: bb Not tainted 6.3.0-rc1-00004-g703695902cfa
RIP: 0010:ext4_file_write_iter+0xbc7/0xd10
Call Trace:
vfs_write+0x3b1/0x5c0
ksys_write+0x77/0x160
__x64_sys_write+0x22/0x30
do_syscall_64+0x39/0x80
Reproducer:
1. create corrupted image and mount it:
mke2fs -t ext4 /tmp/foo.img 200
debugfs -wR "sif <5> size 25700" /tmp/foo.img
mount -t ext4 /tmp/foo.img /mnt
cd /mnt
echo 123 > file
2. Run the reproducer program:
posix_memalign(&buf, 1024, 1024)
fd = open("file", O_RDWR | O_DIRECT);
ioctl(fd, EXT4_IOC_SWAP_BOOT);
write(fd, buf, 1024);
Fix this by setting i_disksize as well as i_size to zero when
initiaizing the boot loader inode.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=217159
Cc: stable@kernel.org
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Link: https://lore.kernel.org/r/20230308032643.641113-1-chengzhihao1@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2023-03-08 11:26:43 +08:00
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
2015-10-17 16:18:43 -04:00
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2019-02-11 00:14:02 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
|
|
|
|
|
2023-07-05 15:01:07 -04:00
|
|
|
|
|
|
|
|
|
2022-09-08 13:24:42 -04:00
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
2022-10-05 17:43:22 +02:00
|
|
|
|
|
|
|
|
|
2020-10-15 13:37:59 -07:00
|
|
|
|
|
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
2024-01-05 17:21:01 +08:00
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2019-02-11 00:14:02 -05:00
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2018-10-02 18:21:19 -04:00
|
|
|
|
2019-02-11 00:14:02 -05:00
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
2019-02-11 00:14:02 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2019-02-11 00:05:24 -05:00
|
|
|
|
2021-02-04 18:05:42 +01:00
|
|
|
|
2014-02-12 11:48:31 -05:00
|
|
|
|
2012-04-18 15:16:33 -04:00
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2019-06-09 21:41:41 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2020-05-28 08:00:02 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2021-04-12 17:19:00 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2020-05-28 08:00:02 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ext4: ioctl: fix erroneous return value
The ext4_ioctl_setflags() function which is used in the ioctls
EXT4_IOC_SETFLAGS and EXT4_IOC_FSSETXATTR may return the positive value
EPERM instead of -EPERM in case of error. This bug was introduced by a
recent commit 9b7365fc.
The following program can be used to illustrate the wrong behavior:
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <err.h>
#define FS_IOC_GETFLAGS _IOR('f', 1, long)
#define FS_IOC_SETFLAGS _IOW('f', 2, long)
#define FS_IMMUTABLE_FL 0x00000010
int main(void)
{
int fd;
long flags;
fd = open("file", O_RDWR|O_CREAT, 0600);
if (fd < 0)
err(1, "open");
if (ioctl(fd, FS_IOC_GETFLAGS, &flags) < 0)
err(1, "ioctl: FS_IOC_GETFLAGS");
flags |= FS_IMMUTABLE_FL;
if (ioctl(fd, FS_IOC_SETFLAGS, &flags) < 0)
err(1, "ioctl: FS_IOC_SETFLAGS");
warnx("ioctl returned no error");
return 0;
}
Running it gives the following result:
$ strace -e ioctl ./test
ioctl(3, FS_IOC_GETFLAGS, 0x7ffdbd8bfd38) = 0
ioctl(3, FS_IOC_SETFLAGS, 0x7ffdbd8bfd38) = 1
test: ioctl returned no error
+++ exited with 0 +++
Running the program on a kernel with the bug fixed gives the proper result:
$ strace -e ioctl ./test
ioctl(3, FS_IOC_GETFLAGS, 0x7ffdd2768258) = 0
ioctl(3, FS_IOC_SETFLAGS, 0x7ffdd2768258) = -1 EPERM (Operation not permitted)
test: ioctl: FS_IOC_SETFLAGS: Operation not permitted
+++ exited with 1 +++
Signed-off-by: Anton Protopopov <a.s.protopopov@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2016-02-11 23:57:21 -05:00
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
|
|
|
|
|
ext4: Support case-insensitive file name lookups
This patch implements the actual support for case-insensitive file name
lookups in ext4, based on the feature bit and the encoding stored in the
superblock.
A filesystem that has the casefold feature set is able to configure
directories with the +F (EXT4_CASEFOLD_FL) attribute, enabling lookups
to succeed in that directory in a case-insensitive fashion, i.e: match
a directory entry even if the name used by userspace is not a byte per
byte match with the disk name, but is an equivalent case-insensitive
version of the Unicode string. This operation is called a
case-insensitive file name lookup.
The feature is configured as an inode attribute applied to directories
and inherited by its children. This attribute can only be enabled on
empty directories for filesystems that support the encoding feature,
thus preventing collision of file names that only differ by case.
* dcache handling:
For a +F directory, Ext4 only stores the first equivalent name dentry
used in the dcache. This is done to prevent unintentional duplication of
dentries in the dcache, while also allowing the VFS code to quickly find
the right entry in the cache despite which equivalent string was used in
a previous lookup, without having to resort to ->lookup().
d_hash() of casefolded directories is implemented as the hash of the
casefolded string, such that we always have a well-known bucket for all
the equivalencies of the same string. d_compare() uses the
utf8_strncasecmp() infrastructure, which handles the comparison of
equivalent, same case, names as well.
For now, negative lookups are not inserted in the dcache, since they
would need to be invalidated anyway, because we can't trust missing file
dentries. This is bad for performance but requires some leveraging of
the vfs layer to fix. We can live without that for now, and so does
everyone else.
* on-disk data:
Despite using a specific version of the name as the internal
representation within the dcache, the name stored and fetched from the
disk is a byte-per-byte match with what the user requested, making this
implementation 'name-preserving'. i.e. no actual information is lost
when writing to storage.
DX is supported by modifying the hashes used in +F directories to make
them case/encoding-aware. The new disk hashes are calculated as the
hash of the full casefolded string, instead of the string directly.
This allows us to efficiently search for file names in the htree without
requiring the user to provide an exact name.
* Dealing with invalid sequences:
By default, when a invalid UTF-8 sequence is identified, ext4 will treat
it as an opaque byte sequence, ignoring the encoding and reverting to
the old behavior for that unique file. This means that case-insensitive
file name lookup will not work only for that file. An optional bit can
be set in the superblock telling the filesystem code and userspace tools
to enforce the encoding. When that optional bit is set, any attempt to
create a file name using an invalid UTF-8 sequence will fail and return
an error to userspace.
* Normalization algorithm:
The UTF-8 algorithms used to compare strings in ext4 is implemented
lives in fs/unicode, and is based on a previous version developed by
SGI. It implements the Canonical decomposition (NFD) algorithm
described by the Unicode specification 12.1, or higher, combined with
the elimination of ignorable code points (NFDi) and full
case-folding (CF) as documented in fs/unicode/utf8_norm.c.
NFD seems to be the best normalization method for EXT4 because:
- It has a lower cost than NFC/NFKC (which requires
decomposing to NFD as an intermediary step)
- It doesn't eliminate important semantic meaning like
compatibility decompositions.
Although:
- This implementation is not completely linguistic accurate, because
different languages have conflicting rules, which would require the
specialization of the filesystem to a given locale, which brings all
sorts of problems for removable media and for users who use more than
one language.
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.co.uk>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-04-25 14:12:08 -04:00
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
|
|
|
|
|
2017-06-22 11:31:25 -04:00
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2020-05-28 08:00:01 -07:00
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2020-05-28 08:00:02 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ext4: Support case-insensitive file name lookups
This patch implements the actual support for case-insensitive file name
lookups in ext4, based on the feature bit and the encoding stored in the
superblock.
A filesystem that has the casefold feature set is able to configure
directories with the +F (EXT4_CASEFOLD_FL) attribute, enabling lookups
to succeed in that directory in a case-insensitive fashion, i.e: match
a directory entry even if the name used by userspace is not a byte per
byte match with the disk name, but is an equivalent case-insensitive
version of the Unicode string. This operation is called a
case-insensitive file name lookup.
The feature is configured as an inode attribute applied to directories
and inherited by its children. This attribute can only be enabled on
empty directories for filesystems that support the encoding feature,
thus preventing collision of file names that only differ by case.
* dcache handling:
For a +F directory, Ext4 only stores the first equivalent name dentry
used in the dcache. This is done to prevent unintentional duplication of
dentries in the dcache, while also allowing the VFS code to quickly find
the right entry in the cache despite which equivalent string was used in
a previous lookup, without having to resort to ->lookup().
d_hash() of casefolded directories is implemented as the hash of the
casefolded string, such that we always have a well-known bucket for all
the equivalencies of the same string. d_compare() uses the
utf8_strncasecmp() infrastructure, which handles the comparison of
equivalent, same case, names as well.
For now, negative lookups are not inserted in the dcache, since they
would need to be invalidated anyway, because we can't trust missing file
dentries. This is bad for performance but requires some leveraging of
the vfs layer to fix. We can live without that for now, and so does
everyone else.
* on-disk data:
Despite using a specific version of the name as the internal
representation within the dcache, the name stored and fetched from the
disk is a byte-per-byte match with what the user requested, making this
implementation 'name-preserving'. i.e. no actual information is lost
when writing to storage.
DX is supported by modifying the hashes used in +F directories to make
them case/encoding-aware. The new disk hashes are calculated as the
hash of the full casefolded string, instead of the string directly.
This allows us to efficiently search for file names in the htree without
requiring the user to provide an exact name.
* Dealing with invalid sequences:
By default, when a invalid UTF-8 sequence is identified, ext4 will treat
it as an opaque byte sequence, ignoring the encoding and reverting to
the old behavior for that unique file. This means that case-insensitive
file name lookup will not work only for that file. An optional bit can
be set in the superblock telling the filesystem code and userspace tools
to enforce the encoding. When that optional bit is set, any attempt to
create a file name using an invalid UTF-8 sequence will fail and return
an error to userspace.
* Normalization algorithm:
The UTF-8 algorithms used to compare strings in ext4 is implemented
lives in fs/unicode, and is based on a previous version developed by
SGI. It implements the Canonical decomposition (NFD) algorithm
described by the Unicode specification 12.1, or higher, combined with
the elimination of ignorable code points (NFDi) and full
case-folding (CF) as documented in fs/unicode/utf8_norm.c.
NFD seems to be the best normalization method for EXT4 because:
- It has a lower cost than NFC/NFKC (which requires
decomposing to NFD as an intermediary step)
- It doesn't eliminate important semantic meaning like
compatibility decompositions.
Although:
- This implementation is not completely linguistic accurate, because
different languages have conflicting rules, which would require the
specialization of the filesystem to a given locale, which brings all
sorts of problems for removable media and for users who use more than
one language.
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.co.uk>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2019-04-25 14:12:08 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2019-06-09 21:41:41 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2020-05-28 08:00:02 -07:00
|
|
|
|
|
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2016-11-29 11:13:13 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2020-05-28 07:59:59 -07:00
|
|
|
|
|
|
|
|
|
2023-07-05 15:01:07 -04:00
|
|
|
|
2022-09-08 13:24:42 -04:00
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2020-05-28 08:00:01 -07:00
|
|
|
|
2017-10-12 11:54:08 -04:00
|
|
|
|
|
|
|
|
|
2020-05-28 07:59:55 -07:00
|
|
|
|
2017-10-12 11:54:08 -04:00
|
|
|
|
2020-05-28 07:59:55 -07:00
|
|
|
|
2017-10-12 11:54:08 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2020-05-28 08:00:01 -07:00
|
|
|
|
|
|
|
|
|
2017-10-12 11:54:08 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2021-04-07 14:36:43 +02:00
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2016-07-05 21:33:52 -04:00
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
2016-09-05 23:11:58 -04:00
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2017-06-22 11:31:25 -04:00
|
|
|
|
ext4: fix setattr project check in fssetxattr ioctl
Currently, project quota could be changed by fssetxattr
ioctl, and existed permission check inode_owner_or_capable()
is obviously not enough, just think that common users could
change project id of file, that could make users to
break project quota easily.
This patch try to follow same regular of xfs project
quota:
"Project Quota ID state is only allowed to change from
within the init namespace. Enforce that restriction only
if we are trying to change the quota ID state.
Everything else is allowed in user namespaces."
Besides that, check and set project id'state should
be an atomic operation, protect whole operation with
inode lock, ext4_ioctl_setproject() is only used for
ioctl EXT4_IOC_FSSETXATTR, we have held mnt_want_write_file()
before ext4_ioctl_setflags(), and ext4_ioctl_setproject()
is called after ext4_ioctl_setflags(), we could share
codes, so remove it inside ext4_ioctl_setproject().
Signed-off-by: Wang Shilong <wshilong@ddn.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Cc: stable@kernel.org
2018-10-03 10:33:32 -04:00
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
2022-12-07 12:59:27 +01:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
|
|
|
|
|
ext4: fix setattr project check in fssetxattr ioctl
Currently, project quota could be changed by fssetxattr
ioctl, and existed permission check inode_owner_or_capable()
is obviously not enough, just think that common users could
change project id of file, that could make users to
break project quota easily.
This patch try to follow same regular of xfs project
quota:
"Project Quota ID state is only allowed to change from
within the init namespace. Enforce that restriction only
if we are trying to change the quota ID state.
Everything else is allowed in user namespaces."
Besides that, check and set project id'state should
be an atomic operation, protect whole operation with
inode lock, ext4_ioctl_setproject() is only used for
ioctl EXT4_IOC_FSSETXATTR, we have held mnt_want_write_file()
before ext4_ioctl_setflags(), and ext4_ioctl_setproject()
is called after ext4_ioctl_setflags(), we could share
codes, so remove it inside ext4_ioctl_setproject().
Signed-off-by: Wang Shilong <wshilong@ddn.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Cc: stable@kernel.org
2018-10-03 10:33:32 -04:00
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2017-08-06 01:00:49 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ext4: fix setattr project check in fssetxattr ioctl
Currently, project quota could be changed by fssetxattr
ioctl, and existed permission check inode_owner_or_capable()
is obviously not enough, just think that common users could
change project id of file, that could make users to
break project quota easily.
This patch try to follow same regular of xfs project
quota:
"Project Quota ID state is only allowed to change from
within the init namespace. Enforce that restriction only
if we are trying to change the quota ID state.
Everything else is allowed in user namespaces."
Besides that, check and set project id'state should
be an atomic operation, protect whole operation with
inode lock, ext4_ioctl_setproject() is only used for
ioctl EXT4_IOC_FSSETXATTR, we have held mnt_want_write_file()
before ext4_ioctl_setflags(), and ext4_ioctl_setproject()
is called after ext4_ioctl_setflags(), we could share
codes, so remove it inside ext4_ioctl_setproject().
Signed-off-by: Wang Shilong <wshilong@ddn.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Cc: stable@kernel.org
2018-10-03 10:33:32 -04:00
|
|
|
|
2017-08-06 01:00:49 -04:00
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ext4: fix setattr project check in fssetxattr ioctl
Currently, project quota could be changed by fssetxattr
ioctl, and existed permission check inode_owner_or_capable()
is obviously not enough, just think that common users could
change project id of file, that could make users to
break project quota easily.
This patch try to follow same regular of xfs project
quota:
"Project Quota ID state is only allowed to change from
within the init namespace. Enforce that restriction only
if we are trying to change the quota ID state.
Everything else is allowed in user namespaces."
Besides that, check and set project id'state should
be an atomic operation, protect whole operation with
inode lock, ext4_ioctl_setproject() is only used for
ioctl EXT4_IOC_FSSETXATTR, we have held mnt_want_write_file()
before ext4_ioctl_setflags(), and ext4_ioctl_setproject()
is called after ext4_ioctl_setflags(), we could share
codes, so remove it inside ext4_ioctl_setproject().
Signed-off-by: Wang Shilong <wshilong@ddn.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Cc: stable@kernel.org
2018-10-03 10:33:32 -04:00
|
|
|
|
|
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2016-07-05 21:33:52 -04:00
|
|
|
|
|
|
|
|
|
2017-06-22 11:46:48 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2016-07-05 21:33:52 -04:00
|
|
|
|
2017-06-22 11:46:48 -04:00
|
|
|
|
2016-07-05 21:33:52 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
2016-07-05 21:33:52 -04:00
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
2023-07-05 15:01:07 -04:00
|
|
|
|
2022-09-08 13:24:42 -04:00
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2021-04-07 14:36:43 +02:00
|
|
|
|
2016-01-08 16:01:22 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2023-06-01 11:44:57 +02:00
|
|
|
|
2017-02-05 19:47:14 -05:00
|
|
|
|
|
|
|
|
|
2023-06-06 15:32:03 +08:00
|
|
|
|
2017-02-05 19:47:14 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2023-06-16 18:50:49 +02:00
|
|
|
|
2017-02-05 19:47:14 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2018-02-18 20:53:23 -05:00
|
|
|
|
2017-02-05 19:47:14 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2023-10-24 15:01:08 +02:00
|
|
|
|
2023-06-06 15:32:03 +08:00
|
|
|
|
|
|
|
|
|
2017-02-05 19:47:14 -05:00
|
|
|
|
2023-10-24 15:01:08 +02:00
|
|
|
|
2017-02-05 19:47:14 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2018-02-18 23:45:18 -05:00
|
|
|
|
2017-02-05 19:47:14 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2018-02-18 23:16:28 -05:00
|
|
|
|
2018-02-18 23:45:18 -05:00
|
|
|
|
2017-02-05 19:47:14 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2023-06-01 11:44:57 +02:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2017-04-30 00:36:53 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2019-05-12 04:49:47 -04:00
|
|
|
|
2017-04-30 00:36:53 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2021-04-29 18:16:49 +08:00
|
|
|
|
2017-04-30 00:36:53 -04:00
|
|
|
|
2021-04-29 18:16:49 +08:00
|
|
|
|
2017-04-30 00:36:53 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2017-09-29 21:39:59 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2021-06-30 20:54:22 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2017-09-29 21:39:59 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2021-05-18 15:13:25 +00:00
|
|
|
|
2017-09-29 21:39:59 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2022-06-29 00:00:26 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2017-09-29 21:39:59 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2021-04-07 14:36:43 +02:00
|
|
|
|
ext4: fix setattr project check in fssetxattr ioctl
Currently, project quota could be changed by fssetxattr
ioctl, and existed permission check inode_owner_or_capable()
is obviously not enough, just think that common users could
change project id of file, that could make users to
break project quota easily.
This patch try to follow same regular of xfs project
quota:
"Project Quota ID state is only allowed to change from
within the init namespace. Enforce that restriction only
if we are trying to change the quota ID state.
Everything else is allowed in user namespaces."
Besides that, check and set project id'state should
be an atomic operation, protect whole operation with
inode lock, ext4_ioctl_setproject() is only used for
ioctl EXT4_IOC_FSSETXATTR, we have held mnt_want_write_file()
before ext4_ioctl_setflags(), and ext4_ioctl_setproject()
is called after ext4_ioctl_setflags(), we could share
codes, so remove it inside ext4_ioctl_setproject().
Signed-off-by: Wang Shilong <wshilong@ddn.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Cc: stable@kernel.org
2018-10-03 10:33:32 -04:00
|
|
|
|
2021-04-07 14:36:43 +02:00
|
|
|
|
2019-07-01 08:25:35 -07:00
|
|
|
|
2021-04-07 14:36:43 +02:00
|
|
|
|
ext4: fix setattr project check in fssetxattr ioctl
Currently, project quota could be changed by fssetxattr
ioctl, and existed permission check inode_owner_or_capable()
is obviously not enough, just think that common users could
change project id of file, that could make users to
break project quota easily.
This patch try to follow same regular of xfs project
quota:
"Project Quota ID state is only allowed to change from
within the init namespace. Enforce that restriction only
if we are trying to change the quota ID state.
Everything else is allowed in user namespaces."
Besides that, check and set project id'state should
be an atomic operation, protect whole operation with
inode lock, ext4_ioctl_setproject() is only used for
ioctl EXT4_IOC_FSSETXATTR, we have held mnt_want_write_file()
before ext4_ioctl_setflags(), and ext4_ioctl_setproject()
is called after ext4_ioctl_setflags(), we could share
codes, so remove it inside ext4_ioctl_setproject().
Signed-off-by: Wang Shilong <wshilong@ddn.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Cc: stable@kernel.org
2018-10-03 10:33:32 -04:00
|
|
|
|
2021-04-07 14:36:43 +02:00
|
|
|
|
|
|
|
|
|
ext4: fix setattr project check in fssetxattr ioctl
Currently, project quota could be changed by fssetxattr
ioctl, and existed permission check inode_owner_or_capable()
is obviously not enough, just think that common users could
change project id of file, that could make users to
break project quota easily.
This patch try to follow same regular of xfs project
quota:
"Project Quota ID state is only allowed to change from
within the init namespace. Enforce that restriction only
if we are trying to change the quota ID state.
Everything else is allowed in user namespaces."
Besides that, check and set project id'state should
be an atomic operation, protect whole operation with
inode lock, ext4_ioctl_setproject() is only used for
ioctl EXT4_IOC_FSSETXATTR, we have held mnt_want_write_file()
before ext4_ioctl_setflags(), and ext4_ioctl_setproject()
is called after ext4_ioctl_setflags(), we could share
codes, so remove it inside ext4_ioctl_setproject().
Signed-off-by: Wang Shilong <wshilong@ddn.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Cc: stable@kernel.org
2018-10-03 10:33:32 -04:00
|
|
|
|
2021-04-07 14:36:43 +02:00
|
|
|
|
2019-07-01 08:25:35 -07:00
|
|
|
|
|
|
|
|
|
2021-04-07 14:36:43 +02:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2023-01-13 12:49:21 +01:00
|
|
|
|
2021-04-07 14:36:43 +02:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ext4: fix setattr project check in fssetxattr ioctl
Currently, project quota could be changed by fssetxattr
ioctl, and existed permission check inode_owner_or_capable()
is obviously not enough, just think that common users could
change project id of file, that could make users to
break project quota easily.
This patch try to follow same regular of xfs project
quota:
"Project Quota ID state is only allowed to change from
within the init namespace. Enforce that restriction only
if we are trying to change the quota ID state.
Everything else is allowed in user namespaces."
Besides that, check and set project id'state should
be an atomic operation, protect whole operation with
inode lock, ext4_ioctl_setproject() is only used for
ioctl EXT4_IOC_FSSETXATTR, we have held mnt_want_write_file()
before ext4_ioctl_setflags(), and ext4_ioctl_setproject()
is called after ext4_ioctl_setflags(), we could share
codes, so remove it inside ext4_ioctl_setproject().
Signed-off-by: Wang Shilong <wshilong@ddn.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Cc: stable@kernel.org
2018-10-03 10:33:32 -04:00
|
|
|
|
|
|
|
|
|
2019-08-11 16:32:41 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2020-05-05 17:43:15 +02:00
|
|
|
|
|
|
|
|
|
2019-08-11 16:32:41 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ext4: add ioctl EXT4_IOC_CHECKPOINT
ioctl EXT4_IOC_CHECKPOINT checkpoints and flushes the journal. This
includes forcing all the transactions to the log, checkpointing the
transactions, and flushing the log to disk. This ioctl takes u32 "flags"
as an argument. Three flags are supported. EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN
can be used to verify input to the ioctl. It returns error if there is any
invalid input, otherwise it returns success without performing
any checkpointing. The other two flags, EXT4_IOC_CHECKPOINT_FLAG_DISCARD
and EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT, can be used to issue requests to
discard or zeroout the journal logs blocks, respectively. At this
point, EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT is primarily added to enable
testing of this codepath on devices that don't support discard.
EXT4_IOC_CHECKPOINT_FLAG_DISCARD and EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT
cannot both be set.
Systems that wish to achieve content deletion SLO can set up a daemon
that calls this ioctl at a regular interval such that it matches with the
SLO requirement. Thus, with this patch, the ext4_dir_entry2 wipeout
patch[1], and the Ext4 "-o discard" mount option set, Ext4 can now
guarantee that all file contents, file metatdata, and filenames will not
be accessible through the filesystem and will have had discard or
zeroout requests issued for corresponding device blocks.
The __jbd2_journal_erase function could also be used to discard or
zero-fill the journal during journal load after recovery. This would
provide a potential solution to a journal replay bug reported earlier this
year[2]. After a successful journal recovery, e2fsck can call this ioctl to
discard the journal as well.
[1] https://lore.kernel.org/linux-ext4/YIHknqxngB1sUdie@mit.edu/
[2] https://lore.kernel.org/linux-ext4/YDZoaacIYStFQT8g@mit.edu/
Link: https://lore.kernel.org/r/20210518151327.130198-2-leah.rumancik@gmail.com
Signed-off-by: Leah Rumancik <leah.rumancik@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2021-05-18 15:13:26 +00:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2022-04-15 06:52:55 +02:00
|
|
|
|
|
|
|
|
|
ext4: add ioctl EXT4_IOC_CHECKPOINT
ioctl EXT4_IOC_CHECKPOINT checkpoints and flushes the journal. This
includes forcing all the transactions to the log, checkpointing the
transactions, and flushing the log to disk. This ioctl takes u32 "flags"
as an argument. Three flags are supported. EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN
can be used to verify input to the ioctl. It returns error if there is any
invalid input, otherwise it returns success without performing
any checkpointing. The other two flags, EXT4_IOC_CHECKPOINT_FLAG_DISCARD
and EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT, can be used to issue requests to
discard or zeroout the journal logs blocks, respectively. At this
point, EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT is primarily added to enable
testing of this codepath on devices that don't support discard.
EXT4_IOC_CHECKPOINT_FLAG_DISCARD and EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT
cannot both be set.
Systems that wish to achieve content deletion SLO can set up a daemon
that calls this ioctl at a regular interval such that it matches with the
SLO requirement. Thus, with this patch, the ext4_dir_entry2 wipeout
patch[1], and the Ext4 "-o discard" mount option set, Ext4 can now
guarantee that all file contents, file metatdata, and filenames will not
be accessible through the filesystem and will have had discard or
zeroout requests issued for corresponding device blocks.
The __jbd2_journal_erase function could also be used to discard or
zero-fill the journal during journal load after recovery. This would
provide a potential solution to a journal replay bug reported earlier this
year[2]. After a successful journal recovery, e2fsck can call this ioctl to
discard the journal as well.
[1] https://lore.kernel.org/linux-ext4/YIHknqxngB1sUdie@mit.edu/
[2] https://lore.kernel.org/linux-ext4/YDZoaacIYStFQT8g@mit.edu/
Link: https://lore.kernel.org/r/20210518151327.130198-2-leah.rumancik@gmail.com
Signed-off-by: Leah Rumancik <leah.rumancik@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2021-05-18 15:13:26 +00:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2021-12-13 14:56:18 +01:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2024-05-23 15:54:12 -07:00
|
|
|
|
2021-12-13 14:56:18 +01:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2022-07-21 15:44:22 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2022-11-10 12:16:29 -08:00
|
|
|
|
|
|
|
|
|
2022-07-21 15:44:22 -07:00
|
|
|
|
2022-11-10 12:16:29 -08:00
|
|
|
|
2022-07-21 15:44:22 -07:00
|
|
|
|
|
|
|
|
|
2022-11-10 12:16:34 -08:00
|
|
|
|
2022-07-21 15:44:22 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2022-11-10 12:16:34 -08:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2022-07-21 15:44:22 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2020-10-15 13:37:57 -07:00
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2013-01-23 17:07:38 -05:00
|
|
|
|
2011-09-09 18:36:51 -04:00
|
|
|
|
2023-01-13 12:49:26 +01:00
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2008-09-08 22:25:24 -04:00
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
|
|
|
|
|
2017-04-30 00:36:53 -04:00
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:53 -07:00
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2006-10-11 01:20:53 -07:00
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2006-10-11 01:20:53 -07:00
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2023-01-13 12:49:26 +01:00
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2008-02-15 14:37:46 -08:00
|
|
|
|
2014-10-13 03:36:16 -04:00
|
|
|
|
2012-04-29 18:31:10 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2011-11-23 11:57:51 -05:00
|
|
|
|
2008-02-15 14:37:46 -08:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2016-01-22 15:40:57 -05:00
|
|
|
|
2013-02-08 21:59:22 -05:00
|
|
|
|
2008-02-15 14:37:46 -08:00
|
|
|
|
|
|
|
|
|
2012-01-03 02:31:52 +01:00
|
|
|
|
2008-02-15 14:37:46 -08:00
|
|
|
|
2006-10-11 01:20:53 -07:00
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2023-07-05 15:01:07 -04:00
|
|
|
|
2022-09-08 13:24:42 -04:00
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2006-10-11 01:20:53 -07:00
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2006-10-11 01:20:53 -07:00
|
|
|
|
2012-01-03 02:31:52 +01:00
|
|
|
|
|
|
|
|
|
2016-01-22 15:40:57 -05:00
|
|
|
|
2008-02-15 14:37:46 -08:00
|
|
|
|
2011-12-09 08:06:57 -05:00
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:53 -07:00
|
|
|
|
|
|
|
|
|
2009-07-13 09:30:17 -04:00
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2011-07-26 21:35:44 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2012-01-04 17:09:52 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2021-06-30 20:54:22 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2011-11-23 11:57:51 -05:00
|
|
|
|
2008-02-15 14:37:46 -08:00
|
|
|
|
2012-01-04 17:09:52 -05:00
|
|
|
|
2008-02-15 14:37:46 -08:00
|
|
|
|
2006-10-11 01:20:53 -07:00
|
|
|
|
2009-07-13 09:30:17 -04:00
|
|
|
|
|
|
|
|
|
2021-05-18 15:13:25 +00:00
|
|
|
|
2009-07-13 09:30:17 -04:00
|
|
|
|
|
|
|
|
|
2008-10-10 20:29:21 -04:00
|
|
|
|
|
|
|
|
|
2011-12-09 08:06:57 -05:00
|
|
|
|
2012-01-04 17:09:52 -05:00
|
|
|
|
2022-06-29 00:00:26 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
|
|
|
|
|
2009-06-17 19:24:03 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2012-08-28 12:52:22 -04:00
|
|
|
|
2009-06-17 19:24:03 -04:00
|
|
|
|
2009-12-06 23:38:31 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2009-06-17 19:24:03 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2009-12-06 23:38:31 -05:00
|
|
|
|
2009-06-17 19:24:03 -04:00
|
|
|
|
2024-07-19 21:19:02 -04:00
|
|
|
|
|
|
|
|
|
2009-06-17 19:24:03 -04:00
|
|
|
|
|
|
|
|
|
2024-07-19 21:19:02 -04:00
|
|
|
|
|
|
|
|
|
2009-06-17 19:24:03 -04:00
|
|
|
|
2015-10-17 16:18:43 -04:00
|
|
|
|
2011-09-09 18:36:51 -04:00
|
|
|
|
|
|
|
|
|
2024-07-19 21:19:02 -04:00
|
|
|
|
2016-02-26 15:19:49 -08:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2024-07-19 21:19:02 -04:00
|
|
|
|
2011-09-09 18:36:51 -04:00
|
|
|
|
|
|
|
|
|
2011-11-23 11:57:51 -05:00
|
|
|
|
2009-12-06 23:38:31 -05:00
|
|
|
|
2024-07-19 21:19:02 -04:00
|
|
|
|
2009-12-06 23:38:31 -05:00
|
|
|
|
2024-05-31 14:12:01 -04:00
|
|
|
|
2009-06-17 19:24:03 -04:00
|
|
|
|
2011-12-09 08:06:57 -05:00
|
|
|
|
2009-06-17 19:24:03 -04:00
|
|
|
|
2010-05-17 07:00:00 -04:00
|
|
|
|
2010-03-04 00:39:24 -05:00
|
|
|
|
2009-12-06 23:38:31 -05:00
|
|
|
|
2009-06-17 19:24:03 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:53 -07:00
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2006-10-11 01:20:53 -07:00
|
|
|
|
2017-09-29 21:39:59 -04:00
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2017-09-29 21:39:59 -04:00
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
|
|
|
|
|
2008-01-28 23:58:26 -05:00
|
|
|
|
2008-09-13 12:52:26 -04:00
|
|
|
|
|
|
|
|
|
2023-01-13 12:49:26 +01:00
|
|
|
|
2008-09-13 12:52:26 -04:00
|
|
|
|
|
|
|
|
|
2011-11-23 11:57:51 -05:00
|
|
|
|
2008-09-13 12:52:26 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2016-01-22 15:40:57 -05:00
|
|
|
|
2008-09-13 12:52:26 -04:00
|
|
|
|
2016-01-22 15:40:57 -05:00
|
|
|
|
2011-12-09 08:06:57 -05:00
|
|
|
|
2008-09-13 12:52:26 -04:00
|
|
|
|
|
|
|
|
|
2008-01-28 23:58:26 -05:00
|
|
|
|
2009-02-26 01:04:07 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2023-01-13 12:49:26 +01:00
|
|
|
|
2009-02-26 01:04:07 -05:00
|
|
|
|
|
|
|
|
|
2011-11-23 11:57:51 -05:00
|
|
|
|
2009-02-26 01:04:07 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2011-12-09 08:06:57 -05:00
|
|
|
|
2009-02-26 01:04:07 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
2014-10-03 12:47:23 -04:00
|
|
|
|
|
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
|
|
|
|
|
2014-10-03 12:47:23 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2023-01-13 12:49:26 +01:00
|
|
|
|
2014-10-03 12:47:23 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2013-04-08 12:54:05 -04:00
|
|
|
|
2012-01-04 17:09:44 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2013-01-13 08:41:45 -05:00
|
|
|
|
2012-01-04 17:09:44 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2012-07-19 11:19:07 +04:00
|
|
|
|
2012-01-04 17:09:44 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2022-01-17 17:36:54 +08:00
|
|
|
|
2012-01-04 17:09:44 -05:00
|
|
|
|
2021-05-18 15:13:25 +00:00
|
|
|
|
2012-01-04 17:09:44 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2012-07-19 11:19:07 +04:00
|
|
|
|
2019-04-25 13:06:18 -04:00
|
|
|
|
2013-01-13 08:41:45 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2012-01-04 17:09:44 -05:00
|
|
|
|
2022-06-29 00:00:26 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2012-01-04 17:09:44 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2010-11-19 21:47:07 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2022-04-15 06:52:55 +02:00
|
|
|
|
2011-02-23 12:42:32 -05:00
|
|
|
|
|
|
|
|
|
2019-03-23 12:10:29 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2011-10-18 10:59:51 -04:00
|
|
|
|
2010-11-19 21:47:07 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2011-10-18 10:59:51 -04:00
|
|
|
|
2010-11-19 21:47:07 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2013-08-16 22:05:14 -04:00
|
|
|
|
|
|
|
|
|
2010-11-19 21:47:07 -05:00
|
|
|
|
2020-07-14 16:09:09 -07:00
|
|
|
|
2016-09-30 01:49:55 -04:00
|
|
|
|
|
|
|
|
|
2016-11-26 19:07:49 -05:00
|
|
|
|
2016-09-30 01:49:55 -04:00
|
|
|
|
2022-05-15 12:07:48 +05:30
|
|
|
|
|
|
|
|
|
2015-04-11 07:48:01 -04:00
|
|
|
|
2020-07-14 16:09:09 -07:00
|
|
|
|
2019-08-04 17:56:43 +08:00
|
|
|
|
|
|
|
|
|
2016-11-26 19:07:49 -05:00
|
|
|
|
2015-04-11 07:48:01 -04:00
|
|
|
|
2019-08-04 19:35:48 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2020-03-14 13:50:50 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2019-08-11 16:30:41 -04:00
|
|
|
|
|
|
|
|
|
2023-01-13 12:49:26 +01:00
|
|
|
|
2019-08-11 16:30:41 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2019-08-11 16:31:41 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2019-08-11 16:32:41 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2017-02-20 15:34:59 -05:00
|
|
|
|
2023-06-01 11:44:57 +02:00
|
|
|
|
2019-07-22 09:26:24 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
fs-verity: add FS_IOC_READ_VERITY_METADATA ioctl
Add an ioctl FS_IOC_READ_VERITY_METADATA which will allow reading verity
metadata from a file that has fs-verity enabled, including:
- The Merkle tree
- The fsverity_descriptor (not including the signature if present)
- The built-in signature, if present
This ioctl has similar semantics to pread(). It is passed the type of
metadata to read (one of the above three), and a buffer, offset, and
size. It returns the number of bytes read or an error.
Separate patches will add support for each of the above metadata types.
This patch just adds the ioctl itself.
This ioctl doesn't make any assumption about where the metadata is
stored on-disk. It does assume the metadata is in a stable format, but
that's basically already the case:
- The Merkle tree and fsverity_descriptor are defined by how fs-verity
file digests are computed; see the "File digest computation" section
of Documentation/filesystems/fsverity.rst. Technically, the way in
which the levels of the tree are ordered relative to each other wasn't
previously specified, but it's logical to put the root level first.
- The built-in signature is the value passed to FS_IOC_ENABLE_VERITY.
This ioctl is useful because it allows writing a server program that
takes a verity file and serves it to a client program, such that the
client can do its own fs-verity compatible verification of the file.
This only makes sense if the client doesn't trust the server and if the
server needs to provide the storage for the client.
More concretely, there is interest in using this ability in Android to
export APK files (which are protected by fs-verity) to "protected VMs".
This would use Protected KVM (https://lwn.net/Articles/836693), which
provides an isolated execution environment without having to trust the
traditional "host". A "guest" VM can boot from a signed image and
perform specific tasks in a minimum trusted environment using files that
have fs-verity enabled on the host, without trusting the host or
requiring that the guest has its own trusted storage.
Technically, it would be possible to duplicate the metadata and store it
in separate files for serving. However, that would be less efficient
and would require extra care in userspace to maintain file consistency.
In addition to the above, the ability to read the built-in signatures is
useful because it allows a system that is using the in-kernel signature
verification to migrate to userspace signature verification.
Link: https://lore.kernel.org/r/20210115181819.34732-4-ebiggers@kernel.org
Reviewed-by: Victor Hsieh <victorhsieh@google.com>
Acked-by: Jaegeuk Kim <jaegeuk@kernel.org>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
2021-01-15 10:18:16 -08:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ext4: add ioctl EXT4_IOC_CHECKPOINT
ioctl EXT4_IOC_CHECKPOINT checkpoints and flushes the journal. This
includes forcing all the transactions to the log, checkpointing the
transactions, and flushing the log to disk. This ioctl takes u32 "flags"
as an argument. Three flags are supported. EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN
can be used to verify input to the ioctl. It returns error if there is any
invalid input, otherwise it returns success without performing
any checkpointing. The other two flags, EXT4_IOC_CHECKPOINT_FLAG_DISCARD
and EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT, can be used to issue requests to
discard or zeroout the journal logs blocks, respectively. At this
point, EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT is primarily added to enable
testing of this codepath on devices that don't support discard.
EXT4_IOC_CHECKPOINT_FLAG_DISCARD and EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT
cannot both be set.
Systems that wish to achieve content deletion SLO can set up a daemon
that calls this ioctl at a regular interval such that it matches with the
SLO requirement. Thus, with this patch, the ext4_dir_entry2 wipeout
patch[1], and the Ext4 "-o discard" mount option set, Ext4 can now
guarantee that all file contents, file metatdata, and filenames will not
be accessible through the filesystem and will have had discard or
zeroout requests issued for corresponding device blocks.
The __jbd2_journal_erase function could also be used to discard or
zero-fill the journal during journal load after recovery. This would
provide a potential solution to a journal replay bug reported earlier this
year[2]. After a successful journal recovery, e2fsck can call this ioctl to
discard the journal as well.
[1] https://lore.kernel.org/linux-ext4/YIHknqxngB1sUdie@mit.edu/
[2] https://lore.kernel.org/linux-ext4/YDZoaacIYStFQT8g@mit.edu/
Link: https://lore.kernel.org/r/20210518151327.130198-2-leah.rumancik@gmail.com
Signed-off-by: Leah Rumancik <leah.rumancik@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2021-05-18 15:13:26 +00:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2021-12-13 14:56:18 +01:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2022-07-21 15:44:22 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2020-10-15 13:37:57 -07:00
|
|
|
|
|
|
|
|
|
2021-12-23 12:21:37 -08:00
|
|
|
|
2020-10-15 13:37:57 -07:00
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2006-10-11 01:20:53 -07:00
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:53 -07:00
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2006-10-11 01:20:53 -07:00
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2006-10-11 01:20:53 -07:00
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2006-10-11 01:20:53 -07:00
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2006-10-11 01:20:53 -07:00
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2006-10-11 01:20:53 -07:00
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2006-10-11 01:20:53 -07:00
|
|
|
|
|
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
2010-05-17 06:00:00 -04:00
|
|
|
|
|
|
|
|
|
2017-09-29 21:39:59 -04:00
|
|
|
|
2010-05-17 06:00:00 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2017-09-29 21:39:59 -04:00
|
|
|
|
2010-05-17 06:00:00 -04:00
|
|
|
|
2010-05-15 00:00:00 -04:00
|
|
|
|
2012-01-04 17:09:44 -05:00
|
|
|
|
2019-06-03 13:51:58 +02:00
|
|
|
|
2013-08-16 22:05:14 -04:00
|
|
|
|
2020-07-14 16:09:09 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2019-08-04 19:35:48 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2020-03-14 13:50:50 -07:00
|
|
|
|
2017-02-20 15:34:59 -05:00
|
|
|
|
2017-04-30 00:36:53 -04:00
|
|
|
|
2019-07-22 09:26:24 -07:00
|
|
|
|
|
|
|
|
|
fs-verity: add FS_IOC_READ_VERITY_METADATA ioctl
Add an ioctl FS_IOC_READ_VERITY_METADATA which will allow reading verity
metadata from a file that has fs-verity enabled, including:
- The Merkle tree
- The fsverity_descriptor (not including the signature if present)
- The built-in signature, if present
This ioctl has similar semantics to pread(). It is passed the type of
metadata to read (one of the above three), and a buffer, offset, and
size. It returns the number of bytes read or an error.
Separate patches will add support for each of the above metadata types.
This patch just adds the ioctl itself.
This ioctl doesn't make any assumption about where the metadata is
stored on-disk. It does assume the metadata is in a stable format, but
that's basically already the case:
- The Merkle tree and fsverity_descriptor are defined by how fs-verity
file digests are computed; see the "File digest computation" section
of Documentation/filesystems/fsverity.rst. Technically, the way in
which the levels of the tree are ordered relative to each other wasn't
previously specified, but it's logical to put the root level first.
- The built-in signature is the value passed to FS_IOC_ENABLE_VERITY.
This ioctl is useful because it allows writing a server program that
takes a verity file and serves it to a client program, such that the
client can do its own fs-verity compatible verification of the file.
This only makes sense if the client doesn't trust the server and if the
server needs to provide the storage for the client.
More concretely, there is interest in using this ability in Android to
export APK files (which are protected by fs-verity) to "protected VMs".
This would use Protected KVM (https://lwn.net/Articles/836693), which
provides an isolated execution environment without having to trust the
traditional "host". A "guest" VM can boot from a signed image and
perform specific tasks in a minimum trusted environment using files that
have fs-verity enabled on the host, without trusting the host or
requiring that the guest has its own trusted storage.
Technically, it would be possible to duplicate the metadata and store it
in separate files for serving. However, that would be less efficient
and would require extra care in userspace to maintain file consistency.
In addition to the above, the ability to read the built-in signatures is
useful because it allows a system that is using the in-kernel signature
verification to migrate to userspace signature verification.
Link: https://lore.kernel.org/r/20210115181819.34732-4-ebiggers@kernel.org
Reviewed-by: Victor Hsieh <victorhsieh@google.com>
Acked-by: Jaegeuk Kim <jaegeuk@kernel.org>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
2021-01-15 10:18:16 -08:00
|
|
|
|
2019-08-11 16:30:41 -04:00
|
|
|
|
2019-08-11 16:31:41 -04:00
|
|
|
|
2019-08-11 16:32:41 -04:00
|
|
|
|
ext4: add ioctl EXT4_IOC_CHECKPOINT
ioctl EXT4_IOC_CHECKPOINT checkpoints and flushes the journal. This
includes forcing all the transactions to the log, checkpointing the
transactions, and flushing the log to disk. This ioctl takes u32 "flags"
as an argument. Three flags are supported. EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN
can be used to verify input to the ioctl. It returns error if there is any
invalid input, otherwise it returns success without performing
any checkpointing. The other two flags, EXT4_IOC_CHECKPOINT_FLAG_DISCARD
and EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT, can be used to issue requests to
discard or zeroout the journal logs blocks, respectively. At this
point, EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT is primarily added to enable
testing of this codepath on devices that don't support discard.
EXT4_IOC_CHECKPOINT_FLAG_DISCARD and EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT
cannot both be set.
Systems that wish to achieve content deletion SLO can set up a daemon
that calls this ioctl at a regular interval such that it matches with the
SLO requirement. Thus, with this patch, the ext4_dir_entry2 wipeout
patch[1], and the Ext4 "-o discard" mount option set, Ext4 can now
guarantee that all file contents, file metatdata, and filenames will not
be accessible through the filesystem and will have had discard or
zeroout requests issued for corresponding device blocks.
The __jbd2_journal_erase function could also be used to discard or
zero-fill the journal during journal load after recovery. This would
provide a potential solution to a journal replay bug reported earlier this
year[2]. After a successful journal recovery, e2fsck can call this ioctl to
discard the journal as well.
[1] https://lore.kernel.org/linux-ext4/YIHknqxngB1sUdie@mit.edu/
[2] https://lore.kernel.org/linux-ext4/YDZoaacIYStFQT8g@mit.edu/
Link: https://lore.kernel.org/r/20210518151327.130198-2-leah.rumancik@gmail.com
Signed-off-by: Leah Rumancik <leah.rumancik@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2021-05-18 15:13:26 +00:00
|
|
|
|
2021-12-13 14:56:18 +01:00
|
|
|
|
|
|
|
|
|
2022-07-21 15:44:22 -07:00
|
|
|
|
|
|
|
|
|
2010-05-15 00:00:00 -04:00
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2008-04-29 22:03:54 -04:00
|
|
|
|
2006-10-11 01:20:50 -07:00
|
|
|
|
|
|
|
|
|
2022-04-14 22:39:00 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2022-06-29 00:00:26 -04:00
|
|
|
|
2022-04-14 22:39:00 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2022-06-29 00:00:26 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2022-04-14 22:39:00 -04:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
