tools: sync uapi/linux/fs.h header into tools subdir

We need this UAPI header in tools/include subdirectory for using it from
BPF selftests.

Link: https://lkml.kernel.org/r/20240627170900.1672542-6

tools: sync uapi/linux/fs.h header into tools subdir

We need this UAPI header in tools/include subdirectory for using it from
BPF selftests.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Andrii Nakryiko <[email protected]>
Acked-by: Liam R. Howlett <[email protected]>
Cc: Alexey Dobriyan <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Christian Brauner <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Mike Rapoport (IBM) <[email protected]>
Cc: Suren Baghdasaryan <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Stephen Rothwell <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

show more ...

selftests/mm: fix vm_util.c build failures: add snapshot of fs.h

On Ubuntu 23.04, on a clean git tree, the selftests/mm build fails due 10
or 20 missing items, all of which are found in fs.h, which

selftests/mm: fix vm_util.c build failures: add snapshot of fs.h

On Ubuntu 23.04, on a clean git tree, the selftests/mm build fails due 10
or 20 missing items, all of which are found in fs.h, which is created via
"make headers". However, as per [1], the idea is to stop requiring "make
headers", and instead, take a snapshot of the files and check them in.

Here are a few of the build errors:

vm_util.c:34:21: error: variable has incomplete type 'struct pm_scan_arg'
struct pm_scan_arg arg;
...
vm_util.c:45:28: error: use of undeclared identifier 'PAGE_IS_WPALLOWED'
...
vm_util.c:55:21: error: variable has incomplete type 'struct page_region'
...
vm_util.c:105:20: error: use of undeclared identifier 'PAGE_IS_SOFT_DIRTY'

To fix this, add fs.h, taken from a snapshot of ./usr/include/linux/fs.h
after running "make headers".

[1] commit e076eaca5906 ("selftests: break the dependency upon local
header files")

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: John Hubbard <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Cc: Andrei Vagin <[email protected]>
Cc: Axel Rasmussen <[email protected]>
Cc: Christian Brauner <[email protected]>
Cc: Jeff Xu <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Kent Overstreet <[email protected]>
Cc: Liam R. Howlett <[email protected]>
Cc: Muhammad Usama Anjum <[email protected]>
Cc: Peter Xu <[email protected]>
Cc: Rich Felker <[email protected]>
Cc: Shuah Khan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

show more ...

tools/include: Sync uapi/linux/fs.h with the kernel sources

To pick up the changes from:

41bcbe59c3b3f ("fs: FS_IOC_GETUUID")
ae8c511757304 ("fs: add FS_IOC_GETFSSYSFSPATH")
73fa7547c70b3 ("v

tools/include: Sync uapi/linux/fs.h with the kernel sources

To pick up the changes from:

41bcbe59c3b3f ("fs: FS_IOC_GETUUID")
ae8c511757304 ("fs: add FS_IOC_GETFSSYSFSPATH")
73fa7547c70b3 ("vfs: add RWF_NOAPPEND flag for pwritev2")

This should be used to beautify fs syscall arguments and it addresses
these tools/perf build warnings:

Warning: Kernel ABI header differences:
diff -u tools/include/uapi/linux/fs.h include/uapi/linux/fs.h

Reviewed-by: Jan Kara <[email protected]>
Reviewed-by: Christian Brauner <[email protected]>
Cc: Alexander Viro <[email protected]>
Cc: [email protected]
Signed-off-by: Namhyung Kim <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

show more ...

fs/proc/task_mmu: report SOFT_DIRTY bits through the PAGEMAP_SCAN ioctl

The PAGEMAP_SCAN ioctl returns information regarding page table entries.
It is more efficient compared to reading pagemap fil

fs/proc/task_mmu: report SOFT_DIRTY bits through the PAGEMAP_SCAN ioctl

The PAGEMAP_SCAN ioctl returns information regarding page table entries.
It is more efficient compared to reading pagemap files. CRIU can start to
utilize this ioctl, but it needs info about soft-dirty bits to track
memory changes.

We are aware of a new method for tracking memory changes implemented in
the PAGEMAP_SCAN ioctl. For CRIU, the primary advantage of this method is
its usability by unprivileged users. However, it is not feasible to
transparently replace the soft-dirty tracker with the new one. The main
problem here is userfault descriptors that have to be preserved between
pre-dump iterations. It means criu continues supporting the soft-dirty
method to avoid breakage for current users. The new method will be
implemented as a separate feature.

[[email protected]: update tools/include/uapi/linux/fs.h]
Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Andrei Vagin <[email protected]>
Reviewed-by: Muhammad Usama Anjum <[email protected]>
Cc: Michał Mirosław <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

show more ...

tools headers UAPI: update linux/fs.h with the kernel sources

New IOCTL and macros has been added in the kernel sources. Update the
tools header file as well.

Link: https://lkml.kernel.org/r/202308

tools headers UAPI: update linux/fs.h with the kernel sources

New IOCTL and macros has been added in the kernel sources. Update the
tools header file as well.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Muhammad Usama Anjum <[email protected]>
Cc: Alex Sierra <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Andrei Vagin <[email protected]>
Cc: Axel Rasmussen <[email protected]>
Cc: Christian Brauner <[email protected]>
Cc: Cyrill Gorcunov <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Gustavo A. R. Silva <[email protected]>
Cc: "Liam R. Howlett" <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Michal Miroslaw <[email protected]>
Cc: Michał Mirosław <[email protected]>
Cc: Mike Rapoport (IBM) <[email protected]>
Cc: Nadav Amit <[email protected]>
Cc: Pasha Tatashin <[email protected]>
Cc: Paul Gofman <[email protected]>
Cc: Peter Xu <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: Suren Baghdasaryan <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Yang Shi <[email protected]>
Cc: Yun Zhou <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

show more ...

treewide: uapi: Replace zero-length arrays with flexible-array members

There is a regular need in the kernel to provide a way to declare
having a dynamically sized set of trailing elements in a stru

treewide: uapi: Replace zero-length arrays with flexible-array members

There is a regular need in the kernel to provide a way to declare
having a dynamically sized set of trailing elements in a structure.
Kernel code should always use “flexible array members”[1] for these
cases. The older style of one-element or zero-length arrays should
no longer be used[2].

This code was transformed with the help of Coccinelle:
(linux-5.19-rc2$ spatch --jobs $(getconf _NPROCESSORS_ONLN) --sp-file script.cocci --include-headers --dir . > output.patch)

@@
identifier S, member, array;
type T1, T2;
@@

struct S {
...
T1 member;
T2 array[
- 0
];
};

-fstrict-flex-arrays=3 is coming and we need to land these changes
to prevent issues like these in the short future:

../fs/minix/dir.c:337:3: warning: 'strcpy' will always overflow; destination buffer has size 0,
but the source string has length 2 (including NUL byte) [-Wfortify-source]
strcpy(de3->name, ".");
^

Since these are all [0] to [] changes, the risk to UAPI is nearly zero. If
this breaks anything, we can use a union with a new member name.

[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays

Link: https://github.com/KSPP/linux/issues/78
Build-tested-by: kernel test robot <[email protected]>
Link: https://lore.kernel.org/lkml/62b675ec.wKX6AOZ6cbE71vtF%[email protected]/
Acked-by: Dan Williams <[email protected]> # For ndctl.h
Signed-off-by: Gustavo A. R. Silva <[email protected]>

show more ...

tools headers UAPI: Sync linux/fs.h with the kernel sources

To pick the change in:

7957d93bf32bc211 ("block: add ioctl to read the disk sequence number")

It adds a new ioctl, but we are still no

tools headers UAPI: Sync linux/fs.h with the kernel sources

To pick the change in:

7957d93bf32bc211 ("block: add ioctl to read the disk sequence number")

It adds a new ioctl, but we are still not using that to generate tables
for 'perf trace', so no changes in tooling.

This silences this perf build warning:

Warning: Kernel ABI header at 'tools/include/uapi/linux/fs.h' differs from latest version at 'include/uapi/linux/fs.h'
diff -u tools/include/uapi/linux/fs.h include/uapi/linux/fs.h

Cc: Jens Axboe <[email protected]>
Cc: Matteo Croce <[email protected]>
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

show more ...

tools headers UAPI: Sync linux/fs.h with the kernel sources

To pick the trivial change in:

63c8af5687f6b1b7 ("block: uapi: fix comment about block device ioctl")

This silences this perf build wa

tools headers UAPI: Sync linux/fs.h with the kernel sources

To pick the trivial change in:

63c8af5687f6b1b7 ("block: uapi: fix comment about block device ioctl")

This silences this perf build warning:

Warning: Kernel ABI header at 'tools/include/uapi/linux/fs.h' differs from latest version at 'include/uapi/linux/fs.h'
diff -u tools/include/uapi/linux/fs.h include/uapi/linux/fs.h

Cc: Damien Le Moal <[email protected]>
Cc: Jens Axboe <[email protected]>
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

show more ...

tools headers UAPI: Sync linux/fs.h with the kernel sources

To pick the changes from:

b383a73f2b83 ("fs/ext4: Introduce DAX inode flag")

And silence this perf build warning:

Warning: Kernel A

tools headers UAPI: Sync linux/fs.h with the kernel sources

To pick the changes from:

b383a73f2b83 ("fs/ext4: Introduce DAX inode flag")

And silence this perf build warning:

Warning: Kernel ABI header at 'tools/include/uapi/linux/fs.h' differs from latest version at 'include/uapi/linux/fs.h'
diff -u tools/include/uapi/linux/fs.h include/uapi/linux/fs.h

It causes various beautifiers for things like fspick, fsmount, etc (see
below) to get rebuilt, but this specific change doesn't make 'perf
trace' be capable of decoding anything new, as we still don't decode
what comes from ioctls, just its cmds.

Details about the update:

$ cp include/uapi/linux/fs.h tools/include/uapi/linux/fs.h
$ git diff
diff --git a/tools/include/uapi/linux/fs.h b/tools/include/uapi/linux/fs.h
index 379a612f8f1d..f44eb0a04afd 100644
--- a/tools/include/uapi/linux/fs.h
+++ b/tools/include/uapi/linux/fs.h
@@ -262,6 +262,7 @@ struct fsxattr {
#define FS_EA_INODE_FL 0x00200000 /* Inode used for large EA */
#define FS_EOFBLOCKS_FL 0x00400000 /* Reserved for ext4 */
#define FS_NOCOW_FL 0x00800000 /* Do not cow file */
+#define FS_DAX_FL 0x02000000 /* Inode is DAX */
#define FS_INLINE_DATA_FL 0x10000000 /* Reserved for ext4 */
#define FS_PROJINHERIT_FL 0x20000000 /* Create with parents projid */
#define FS_CASEFOLD_FL 0x40000000 /* Folder is case insensitive */
$ m
make: Entering directory '/home/acme/git/perf/tools/perf'
BUILD: Doing 'make -j8' parallel build
INSTALL GTK UI
CC /tmp/build/perf/builtin-trace.o
DESCEND plugins
CC /tmp/build/perf/trace/beauty/fsmount.o
CC /tmp/build/perf/trace/beauty/fspick.o
CC /tmp/build/perf/trace/beauty/mount_flags.o
CC /tmp/build/perf/trace/beauty/move_mount.o
CC /tmp/build/perf/trace/beauty/renameat.o
CC /tmp/build/perf/trace/beauty/sync_file_range.o
INSTALL trace_plugins
LD /tmp/build/perf/trace/beauty/perf-in.o
LD /tmp/build/perf/perf-in.o
LINK /tmp/build/perf/perf
<SNIP>

Cc: Adrian Hunter <[email protected]>
Cc: Ira Weiny <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Theodore Ts'o <[email protected]>
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

show more ...

tools headers uapi: Sync linux/fs.h with the kernel sources

To pick the changes from:

78a1b96bcf7a ("fscrypt: add FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS ioctl")
23c688b54016 ("fscrypt: allow un

tools headers uapi: Sync linux/fs.h with the kernel sources

To pick the changes from:

78a1b96bcf7a ("fscrypt: add FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS ioctl")
23c688b54016 ("fscrypt: allow unprivileged users to add/remove keys for v2 policies")
5dae460c2292 ("fscrypt: v2 encryption policy support")
5a7e29924dac ("fscrypt: add FS_IOC_GET_ENCRYPTION_KEY_STATUS ioctl")
b1c0ec3599f4 ("fscrypt: add FS_IOC_REMOVE_ENCRYPTION_KEY ioctl")
22d94f493bfb ("fscrypt: add FS_IOC_ADD_ENCRYPTION_KEY ioctl")
3b6df59bc4d2 ("fscrypt: use FSCRYPT_* definitions, not FS_*")
2336d0deb2d4 ("fscrypt: use FSCRYPT_ prefix for uapi constants")
7af0ab0d3aab ("fs, fscrypt: move uapi definitions to new header <linux/fscrypt.h>")

That don't trigger any changes in tooling, as it so far is used only
for:

$ grep -l 'fs\.h' tools/perf/trace/beauty/*.sh | xargs grep regex=
tools/perf/trace/beauty/rename_flags.sh:regex='^[[:space:]]*#[[:space:]]*define[[:space:]]+RENAME_([[:alnum:]_]+)[[:space:]]+\(1[[:space:]]*<<[[:space:]]*([[:xdigit:]]+)[[:space:]]*\)[[:space:]]*.*'
tools/perf/trace/beauty/sync_file_range.sh:regex='^[[:space:]]*#[[:space:]]*define[[:space:]]+SYNC_FILE_RANGE_([[:alnum:]_]+)[[:space:]]+([[:xdigit:]]+)[[:space:]]*.*'
tools/perf/trace/beauty/usbdevfs_ioctl.sh:regex="^#[[:space:]]*define[[:space:]]+USBDEVFS_(\w+)(\(\w+\))?[[:space:]]+_IO[CWR]{0,2}\([[:space:]]*(_IOC_\w+,[[:space:]]*)?'U'[[:space:]]*,[[:space:]]*([[:digit:]]+).*"
tools/perf/trace/beauty/usbdevfs_ioctl.sh:regex="^#[[:space:]]*define[[:space:]]+USBDEVFS_(\w+)[[:space:]]+_IO[WR]{0,2}\([[:space:]]*'U'[[:space:]]*,[[:space:]]*([[:digit:]]+).*"
$

This silences this perf build warning:

Warning: Kernel ABI header at 'tools/include/uapi/linux/fs.h' differs from latest version at 'include/uapi/linux/fs.h'
diff -u tools/include/uapi/linux/fs.h include/uapi/linux/fs.h

Cc: Adrian Hunter <[email protected]>
Cc: Eric Biggers <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Link: https://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

show more ...

fs: Reserve flag for casefolding

In preparation for including the casefold feature within f2fs, elevate
the EXT4_CASEFOLD_FL flag to FS_CASEFOLD_FL.

Signed-off-by: Daniel Rosenberg <[email protected]

fs: Reserve flag for casefolding

In preparation for including the casefold feature within f2fs, elevate
the EXT4_CASEFOLD_FL flag to FS_CASEFOLD_FL.

Signed-off-by: Daniel Rosenberg <[email protected]>
Reviewed-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>

show more ...

tools headers UAPI: Sync linux/fs.h with the kernel

To pick up the changes in:

c553ea4fdf27 ("fs/sync.c: sync_file_range(2) may use WB_SYNC_ALL writeback")

That should be used to beautify the 's

tools headers UAPI: Sync linux/fs.h with the kernel

To pick up the changes in:

c553ea4fdf27 ("fs/sync.c: sync_file_range(2) may use WB_SYNC_ALL writeback")

That should be used to beautify the 'sync_file_range' syscall 'flags'
arg.

This silences this perf build warning:

Warning: Kernel ABI header at 'tools/include/uapi/linux/fs.h' differs from latest version at 'include/uapi/linux/fs.h'
diff -u tools/include/uapi/linux/fs.h include/uapi/linux/fs.h

Cc: Adrian Hunter <[email protected]>
Cc: Amir Goldstein <[email protected]>
Cc: Brendan Gregg <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Luis Cláudio Gonçalves <[email protected]>
Cc: Namhyung Kim <[email protected]>
Link: https://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

show more ...

tools include uapi: Sync linux/fs.h copy with the kernel sources

To get the changes in:

e262e32d6bde ("vfs: Suppress MS_* flag defs within the kernel unless explicitly enabled")

That made the mo

tools include uapi: Sync linux/fs.h copy with the kernel sources

To get the changes in:

e262e32d6bde ("vfs: Suppress MS_* flag defs within the kernel unless explicitly enabled")

That made the mount flags string table generator to switch to using
mount.h instead.

This silences the following perf build warning:

Warning: Kernel ABI header at 'tools/include/uapi/linux/fs.h' differs from latest version at 'include/uapi/linux/fs.h'
diff -u tools/include/uapi/linux/fs.h include/uapi/linux/fs.h

Cc: Adrian Hunter <[email protected]>
Cc: David Howells <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Luis Cláudio Gonçalves <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Wang Nan <[email protected]>
Link: https://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

show more ...

tools include uapi: Update linux/fs.h copy

To silence this perf build warning:

Warning: Kernel ABI header at 'tools/include/uapi/linux/fs.h' differs from latest version at 'include/uapi/linux/fs.

tools include uapi: Update linux/fs.h copy

To silence this perf build warning:

Warning: Kernel ABI header at 'tools/include/uapi/linux/fs.h' differs from latest version at 'include/uapi/linux/fs.h'
diff -u tools/include/uapi/linux/fs.h include/uapi/linux/fs.h

Due to just two comments added by:

Fixes: 578bdaabd015 ("crypto: speck - remove Speck")

So nothing that entails changes in tools/, that so far uses fs.h to
generate the mount and umount syscalls 'flags' argument integer->string
tables with:

$ tools/perf/trace/beauty/mount_flags.sh
static const char *mount_flags[] = {
[4096 ? (ilog2(4096) + 1) : 0] = "BIND",
<SNIP>
[30 + 1] = "ACTIVE",
[31 + 1] = "NOUSER",
};
$
# trace -e mount,umount mount --bind /proc /mnt
1.228 ( 2.581 ms): mount/1068 mount(dev_name: /mnt, dir_name: 0x55f011c354a0, type: 0x55f011c38170, flags: BIND) = 0
# trace -e mount,umount umount /proc /mnt
umount: /proc: target is busy.
1.587 ( 0.010 ms): umount/1070 umount2(name: /proc) = -1 EBUSY Device or resource busy
1.799 (12.660 ms): umount/1070 umount2(name: /mnt) = 0
#

Cc: Adrian Hunter <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Wang Nan <[email protected]>
Cc: Jason A. Donenfeld <[email protected]>
Cc: Herbert Xu <[email protected]>
Link: https://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

show more ...

tools include uapi: Grab a copy of linux/fs.h

We'll use it to create tables for the 'flags' argument to the 'mount'
and 'umount' syscalls.

Add it to check_headers.sh so that when a new protocol get

tools include uapi: Grab a copy of linux/fs.h

We'll use it to create tables for the 'flags' argument to the 'mount'
and 'umount' syscalls.

Add it to check_headers.sh so that when a new protocol gets added we get
a notification during the build process.

Cc: Adrian Hunter <[email protected]>
Cc: Benjamin Peterson <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Wang Nan <[email protected]>
Link: https://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

show more ...