sysctl: treewide: constify the ctl_table argument of proc_handlers

const qualify the struct ctl_table argument in the proc_handler function
signatures. This is a prerequisite to moving the static ct

sysctl: treewide: constify the ctl_table argument of proc_handlers

const qualify the struct ctl_table argument in the proc_handler function
signatures. This is a prerequisite to moving the static ctl_table
structs into .rodata data which will ensure that proc_handler function
pointers cannot be modified.

This patch has been generated by the following coccinelle script:

```
virtual patch

@r1@
identifier ctl, write, buffer, lenp, ppos;
identifier func !~ "appldata_(timer|interval)_handler|sched_(rt|rr)_handler|rds_tcp_skbuf_handler|proc_sctp_do_(hmac_alg|rto_min|rto_max|udp_port|alpha_beta|auth|probe_interval)";
@@

int func(
- struct ctl_table *ctl
+ const struct ctl_table *ctl
,int write, void *buffer, size_t *lenp, loff_t *ppos);

@r2@
identifier func, ctl, write, buffer, lenp, ppos;
@@

int func(
- struct ctl_table *ctl
+ const struct ctl_table *ctl
,int write, void *buffer, size_t *lenp, loff_t *ppos)
{ ... }

@r3@
identifier func;
@@

int func(
- struct ctl_table *
+ const struct ctl_table *
,int , void *, size_t *, loff_t *);

@r4@
identifier func, ctl;
@@

int func(
- struct ctl_table *ctl
+ const struct ctl_table *ctl
,int , void *, size_t *, loff_t *);

@r5@
identifier func, write, buffer, lenp, ppos;
@@

int func(
- struct ctl_table *
+ const struct ctl_table *
,int write, void *buffer, size_t *lenp, loff_t *ppos);

```

* Code formatting was adjusted in xfs_sysctl.c to comply with code
conventions. The xfs_stats_clear_proc_handler,
xfs_panic_mask_proc_handler and xfs_deprecated_dointvec_minmax where
adjusted.

* The ctl_table argument in proc_watchdog_common was const qualified.
This is called from a proc_handler itself and is calling back into
another proc_handler, making it necessary to change it as part of the
proc_handler migration.

Co-developed-by: Thomas Weißschuh <[email protected]>
Signed-off-by: Thomas Weißschuh <[email protected]>
Co-developed-by: Joel Granados <[email protected]>
Signed-off-by: Joel Granados <[email protected]>

show more ...

net: sunrpc: Remove the now superfluous sentinel elements from ctl_table array

This commit comes at the tail end of a greater effort to remove the
empty elements at the end of the ctl_table arrays (

net: sunrpc: Remove the now superfluous sentinel elements from ctl_table array

This commit comes at the tail end of a greater effort to remove the
empty elements at the end of the ctl_table arrays (sentinels) which
will reduce the overall build time size of the kernel and run time
memory bloat by ~64 bytes per sentinel (further information Link :
https://lore.kernel.org/all/ZO5Yx5JFogGi%[email protected]/)

* Remove sentinel element from ctl_table structs.

Signed-off-by: Joel Granados <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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sunrpc: simplify one-level sysctl registration for debug_table

There is no need to declare an extra tables to just create directory,
this can be easily be done with a prefix path with register_sysct

sunrpc: simplify one-level sysctl registration for debug_table

There is no need to declare an extra tables to just create directory,
this can be easily be done with a prefix path with register_sysctl().

Simplify this registration.

Signed-off-by: Luis Chamberlain <[email protected]>
Reviewed-by: Jeff Layton <[email protected]>
Signed-off-by: Anna Schumaker <[email protected]>

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sunrpc: move sunrpc_table and proc routines above

No need to do a forward declaration for sunrpc_table, just move
the sysctls up as everyone else does it. This will make the next
change easier to re

sunrpc: move sunrpc_table and proc routines above

No need to do a forward declaration for sunrpc_table, just move
the sysctls up as everyone else does it. This will make the next
change easier to read. This change produces no functional changes.

Signed-off-by: Luis Chamberlain <[email protected]>
Reviewed-by: Jeff Layton <[email protected]>
Signed-off-by: Anna Schumaker <[email protected]>

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net/sunrpc: fix useless comparison in proc_do_xprt()

In the original code, the "if (*lenp < 0)" check didn't work because
"*lenp" is unsigned. Fortunately, the memory_read_from_buffer() call
will n

net/sunrpc: fix useless comparison in proc_do_xprt()

In the original code, the "if (*lenp < 0)" check didn't work because
"*lenp" is unsigned. Fortunately, the memory_read_from_buffer() call
will never fail in this context so it doesn't affect runtime.

Signed-off-by: Dan Carpenter <[email protected]>
Signed-off-by: J. Bruce Fields <[email protected]>

show more ...

net/sunrpc: return 0 on attempt to write to "transports"

You can't write to this file because the permissions are 0444. But
it sort of looked like you could do a write and it would result in
a read

net/sunrpc: return 0 on attempt to write to "transports"

You can't write to this file because the permissions are 0444. But
it sort of looked like you could do a write and it would result in
a read. Then it looked like proc_sys_call_handler() just ignored
it. Which is confusing. It's more clear if the "write" just
returns zero.

Also, the "lenp" pointer is never NULL so that check can be removed.

Signed-off-by: Dan Carpenter <[email protected]>
Signed-off-by: J. Bruce Fields <[email protected]>

show more ...

net/sunrpc: Fix return value for sysctl sunrpc.transports

Fix returning value for sysctl sunrpc.transports.
Return error code from sysctl proc_handler function proc_do_xprt instead of number of the

net/sunrpc: Fix return value for sysctl sunrpc.transports

Fix returning value for sysctl sunrpc.transports.
Return error code from sysctl proc_handler function proc_do_xprt instead of number of the written bytes.
Otherwise sysctl returns random garbage for this key.

Since v1:
- Handle negative returned value from memory_read_from_buffer as an error

Signed-off-by: Artur Molchanov <[email protected]>
Cc: [email protected]
Signed-off-by: J. Bruce Fields <[email protected]>

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sunrpc: Avoid comma separated statements

Use semicolons and braces.

Signed-off-by: Joe Perches <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

sysctl: pass kernel pointers to ->proc_handler

Instead of having all the sysctl handlers deal with user pointers, which
is rather hairy in terms of the BPF interaction, copy the input to and
from u

sysctl: pass kernel pointers to ->proc_handler

Instead of having all the sysctl handlers deal with user pointers, which
is rather hairy in terms of the BPF interaction, copy the input to and
from userspace in common code. This also means that the strings are
always NUL-terminated by the common code, making the API a little bit
safer.

As most handler just pass through the data to one of the common handlers
a lot of the changes are mechnical.

Signed-off-by: Christoph Hellwig <[email protected]>
Acked-by: Andrey Ignatov <[email protected]>
Signed-off-by: Al Viro <[email protected]>

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treewide: Add SPDX license identifier for missed files

Add SPDX license identifiers to all files which:

- Have no license information of any form

- Have EXPORT_.*_SYMBOL_GPL inside which was use

treewide: Add SPDX license identifier for missed files

Add SPDX license identifiers to all files which:

- Have no license information of any form

- Have EXPORT_.*_SYMBOL_GPL inside which was used in the
initial scan/conversion to ignore the file

These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:

GPL-2.0-only

Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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Remove 'type' argument from access_ok() function

Nobody has actually used the type (VERIFY_READ vs VERIFY_WRITE) argument
of the user address range verification function since we got rid of the
old

Remove 'type' argument from access_ok() function

Nobody has actually used the type (VERIFY_READ vs VERIFY_WRITE) argument
of the user address range verification function since we got rid of the
old racy i386-only code to walk page tables by hand.

It existed because the original 80386 would not honor the write protect
bit when in kernel mode, so you had to do COW by hand before doing any
user access. But we haven't supported that in a long time, and these
days the 'type' argument is a purely historical artifact.

A discussion about extending 'user_access_begin()' to do the range
checking resulted this patch, because there is no way we're going to
move the old VERIFY_xyz interface to that model. And it's best done at
the end of the merge window when I've done most of my merges, so let's
just get this done once and for all.

This patch was mostly done with a sed-script, with manual fix-ups for
the cases that weren't of the trivial 'access_ok(VERIFY_xyz' form.

There were a couple of notable cases:

- csky still had the old "verify_area()" name as an alias.

- the iter_iov code had magical hardcoded knowledge of the actual
values of VERIFY_{READ,WRITE} (not that they mattered, since nothing
really used it)

- microblaze used the type argument for a debug printout

but other than those oddities this should be a total no-op patch.

I tried to fix up all architectures, did fairly extensive grepping for
access_ok() uses, and the changes are trivial, but I may have missed
something. Any missed conversion should be trivially fixable, though.

Signed-off-by: Linus Torvalds <[email protected]>

show more ...

Replace <asm/uaccess.h> with <linux/uaccess.h> globally

This was entirely automated, using the script by Al:

PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>'
sed -i -e "s!$PA

Replace <asm/uaccess.h> with <linux/uaccess.h> globally

This was entirely automated, using the script by Al:

PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>'
sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \
$(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h)

to do the replacement at the end of the merge window.

Requested-by: Al Viro <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

show more ...

Sunrpc: Supports hexadecimal number for sysctl files of sunrpc debug

The sunrpc debug sysctl files only accept decimal number right now.
But all the XXXDBUG_XXX macros are defined as hexadecimal.
It

Sunrpc: Supports hexadecimal number for sysctl files of sunrpc debug

The sunrpc debug sysctl files only accept decimal number right now.
But all the XXXDBUG_XXX macros are defined as hexadecimal.
It is not easy to set or check an separate flag.

This patch let those files support accepting hexadecimal number,
(decimal number is also supported). Also, display it as hexadecimal.

v2,
Remove duplicate parsing of '0x...', just using simple_strtol(tmpbuf, &s, 0)
Fix a bug of isspace() checking after parsing

Signed-off-by: Kinglong Mee <[email protected]>
Signed-off-by: Trond Myklebust <[email protected]>

show more ...

sunrpc: eliminate RPC_DEBUG

It's always set to whatever CONFIG_SUNRPC_DEBUG is, so just use that.

Signed-off-by: Jeff Layton <[email protected]>
Signed-off-by: Trond Myklebust <trond.myklebus

sunrpc: eliminate RPC_DEBUG

It's always set to whatever CONFIG_SUNRPC_DEBUG is, so just use that.

Signed-off-by: Jeff Layton <[email protected]>
Signed-off-by: Trond Myklebust <[email protected]>

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net: Convert uses of typedef ctl_table to struct ctl_table

Reduce the uses of this unnecessary typedef.

Done via perl script:

$ git grep --name-only -w ctl_table net | \
xargs perl -p -i -e '\

net: Convert uses of typedef ctl_table to struct ctl_table

Reduce the uses of this unnecessary typedef.

Done via perl script:

$ git grep --name-only -w ctl_table net | \
xargs perl -p -i -e '\
sub trim { my ($local) = @_; $local =~ s/(^\s+|\s+$)//g; return $local; } \
s/\b(?<!struct\s)ctl_table\b(\s*\*\s*|\s+\w+)/"struct ctl_table " . trim($1)/ge'

Reflow the modified lines that now exceed 80 columns.

Signed-off-by: Joe Perches <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

show more ...

SUNRPC: make SUNPRC clients list per network namespace context

This patch moves static SUNRPC clients list and it's lock to sunrpc_net
structure.
Currently this list is used only for debug purposes.

SUNRPC: make SUNPRC clients list per network namespace context

This patch moves static SUNRPC clients list and it's lock to sunrpc_net
structure.
Currently this list is used only for debug purposes. But later it will be used
also for selecting clients by networks namespace on PipeFS mount/umount events.
Per-network namespace lists will make this faster and simplier.

Note: client list is taken from "init_net" network namespace context in
rpc_show_tasks(). This will be changed some day later with making SUNRPC
sysctl's per network namespace context.

Signed-off-by: Stanislav Kinsbursky <[email protected]>
Signed-off-by: Trond Myklebust <[email protected]>

show more ...

sysctl: Drop & in front of every proc_handler.

For consistency drop & in front of every proc_handler. Explicity
taking the address is unnecessary and it prevents optimizations
like stubbing the pro

sysctl: Drop & in front of every proc_handler.

For consistency drop & in front of every proc_handler. Explicity
taking the address is unnecessary and it prevents optimizations
like stubbing the proc_handlers to NULL.

Cc: Alexey Dobriyan <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Joe Perches <[email protected]>
Signed-off-by: Eric W. Biederman <[email protected]>

show more ...

sysctl net: Remove unused binary sysctl code

Now that sys_sysctl is a compatiblity wrapper around /proc/sys
all sysctl strategy routines, and all ctl_name and strategy
entries in the sysctl tables a

sysctl net: Remove unused binary sysctl code

Now that sys_sysctl is a compatiblity wrapper around /proc/sys
all sysctl strategy routines, and all ctl_name and strategy
entries in the sysctl tables are unused, and can be
revmoed.

In addition neigh_sysctl_register has been modified to no longer
take a strategy argument and it's callers have been modified not
to pass one.

Cc: "David Miller" <[email protected]>
Cc: Hideaki YOSHIFUJI <[email protected]>
Cc: [email protected]
Signed-off-by: Eric W. Biederman <[email protected]>

show more ...

sysctl: remove "struct file *" argument of ->proc_handler

It's unused.

It isn't needed -- read or write flag is already passed and sysctl
shouldn't care about the rest.

It _was_ used in two places

sysctl: remove "struct file *" argument of ->proc_handler

It's unused.

It isn't needed -- read or write flag is already passed and sysctl
shouldn't care about the rest.

It _was_ used in two places at arch/frv for some reason.

Signed-off-by: Alexey Dobriyan <[email protected]>
Cc: David Howells <[email protected]>
Cc: "Eric W. Biederman" <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Ralf Baechle <[email protected]>
Cc: Martin Schwidefsky <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: James Morris <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

show more ...

sunrpc: fix possible overrun on read of /proc/sys/sunrpc/transports

Vegard Nossum reported
----------------------
> I noticed that something weird is going on with /proc/sys/sunrpc/transports.
> Thi

sunrpc: fix possible overrun on read of /proc/sys/sunrpc/transports

Vegard Nossum reported
----------------------
> I noticed that something weird is going on with /proc/sys/sunrpc/transports.
> This file is generated in net/sunrpc/sysctl.c, function proc_do_xprt(). When
> I "cat" this file, I get the expected output:
> $ cat /proc/sys/sunrpc/transports
> tcp 1048576
> udp 32768

> But I think that it does not check the length of the buffer supplied by
> userspace to read(). With my original program, I found that the stack was
> being overwritten by the characters above, even when the length given to
> read() was just 1.

David Wagner added (among other things) that copy_to_user could be
probably used here.

Ingo Oeser suggested to use simple_read_from_buffer() here.

The conclusion is that proc_do_xprt doesn't check for userside buffer
size indeed so fix this by using Ingo's suggestion.

Reported-by: Vegard Nossum <[email protected]>
Signed-off-by: Cyrill Gorcunov <[email protected]>
CC: Ingo Oeser <[email protected]>
Cc: Neil Brown <[email protected]>
Cc: Chuck Lever <[email protected]>
Cc: Greg Banks <[email protected]>
Cc: Tom Tucker <[email protected]>
Signed-off-by: J. Bruce Fields <[email protected]>

show more ...

svc: Add /proc/sys/sunrpc/transport files

Add a file that when read lists the set of registered svc
transports.

Signed-off-by: Tom Tucker <[email protected]>
Acked-by: Neil Brown <neilb@sus

svc: Add /proc/sys/sunrpc/transport files

Add a file that when read lists the set of registered svc
transports.

Signed-off-by: Tom Tucker <[email protected]>
Acked-by: Neil Brown <[email protected]>
Reviewed-by: Chuck Lever <[email protected]>
Reviewed-by: Greg Banks <[email protected]>
Signed-off-by: J. Bruce Fields <[email protected]>

show more ...

SUNRPC: Restrict sunrpc client exports

The sunrpc client exports are not meant to be part of any official kernel
API: they can change at the drop of a hat. Mark them as internal functions
using EXPO

SUNRPC: Restrict sunrpc client exports

The sunrpc client exports are not meant to be part of any official kernel
API: they can change at the drop of a hat. Mark them as internal functions
using EXPORT_SYMBOL_GPL.

Signed-off-by: Trond Myklebust <[email protected]>

show more ...

SUNRPC: Move exported declarations to the function declarations

Do this for all RPC client related functions and XDR functions.

Signed-off-by: Trond Myklebust <[email protected]>

sunrpc: fix rpc debugging

Commit baa3a2a0d24ebcf1c451bec8e5bee3d3467f4cbb ("sysctl: remove broken
sunrpc debug binary sysctls"), by removing initialization of the
ctl_name field, broke this conditio

sunrpc: fix rpc debugging

Commit baa3a2a0d24ebcf1c451bec8e5bee3d3467f4cbb ("sysctl: remove broken
sunrpc debug binary sysctls"), by removing initialization of the
ctl_name field, broke this conditional, preventing the display of
rpc_tasks that you previously got when turning on rpc debugging.

[[email protected]: coding-style fixes]
Signed-off-by: J. Bruce Fields <[email protected]>
Acked-by: "Eric W. Biederman" <[email protected]>
Cc: "David S. Miller" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

show more ...

[SUNRPC]: fix rpc debugging

Commit baa3a2a0d24ebcf1c451bec8e5bee3d3467f4cbb, by removing initialization
of the ctl_name field, broke this conditional, preventing the display of
rpc_tasks that you pr

[SUNRPC]: fix rpc debugging

Commit baa3a2a0d24ebcf1c451bec8e5bee3d3467f4cbb, by removing initialization
of the ctl_name field, broke this conditional, preventing the display of
rpc_tasks that you previously got when turning on rpc debugging.

[[email protected]: coding-style fixes]

Signed-off-by: J. Bruce Fields <[email protected]>
Acked-by: "Eric W. Biederman" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

show more ...