[1/2] selftests/filesystems: devpts_pts included wrong header

Message ID 20180418075256.300-1-anders.roxell@linaro.org
State New
Headers show
Series
  • [1/2] selftests/filesystems: devpts_pts included wrong header
Related show

Commit Message

Anders Roxell April 18, 2018, 7:52 a.m.
We were picking up the wrong header should use asm/ioctls.h form the kernel
and not the header from the system (sys/ioctl.h). In the current code we
added the correct include and we added the kernel headers path to the CFLAGS.

Fixes: ce290a19609d ("selftests: add devpts selftests")
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>

---

Hi,

I've been running devpts_pts on a mainline kernel (4.16+git0+60cc43fc88) and
the verify_invalid_ptmx_bind_mount() test failes with this failure:

root@intel-core2-32:~# ./devpts_pts
Failed to perform TIOCGPTPEER ioctl

However, I'm still confused why I'm not able to get the test to pass.  Strace
showes that -ENOENT return in the TIOCGPTPEER implementation in the
kernel. I think the -ENOENT gets returned from this path
devpts_mntget()->devpts_ptmx_path->path_pts().

See the strace issue below:
root@intel-core2-32:~# strace ./devpts_pts
execve("./devpts_pts", ["./devpts_pts"], [/* 17 vars */]) = 0
brk(NULL)                               = 0x5634e0092000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f459d338000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=16726, ...}) = 0
mmap(NULL, 16726, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f459d333000
close(3)                                = 0
open("/lib/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\260\3\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1681056, ...}) = 0
mmap(NULL, 3787168, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f459cd7b000
mprotect(0x7f459cf0f000, 2093056, PROT_NONE) = 0
mmap(0x7f459d10e000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x193000) = 0x7f459d10e000
mmap(0x7f459d114000, 14752, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f459d114000
close(3)                                = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f459d331000
arch_prctl(ARCH_SET_FS, 0x7f459d331700) = 0
mprotect(0x7f459d10e000, 16384, PROT_READ) = 0
mprotect(0x5634debe3000, 4096, PROT_READ) = 0
mprotect(0x7f459d33a000, 4096, PROT_READ) = 0
munmap(0x7f459d333000, 16726)           = 0
ioctl(0, TCGETS, {B38400 opost isig icanon echo ...}) = 0
unshare(CLONE_NEWNS)                    = 0
mount("", "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0
mount("/dev/pts/ptmx", "/dev/ptmx", NULL, MS_BIND, NULL) = 0
open("/dev/ptmx", O_RDWR|O_NOCTTY|O_CLOEXEC) = 3
ioctl(3, TIOCSPTLCK, [0])               = 0
ioctl(3, _IOC(0, 0x54, 0x41, 0x00), 0x80102) = 4
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f459d3319d0) = 4377
wait4(4377, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 4377
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=4377, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
close(3)                                = 0
close(4)                                = 0
getpid()                                = 4376
open("/tmp/devpts_ptmx_Z6aEvy", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
mount("/dev/pts/ptmx", "/tmp/devpts_ptmx_Z6aEvy", NULL, MS_BIND, NULL) = 0
close(3)                                = 0
open("/tmp/devpts_ptmx_Z6aEvy", O_RDWR|O_NOCTTY|O_CLOEXEC) = 3
ioctl(3, TIOCSPTLCK, [0])               = 0
ioctl(3, _IOC(0, 0x54, 0x41, 0x00), 0x80102) = -1 ENOENT (No such file or directory)
write(2, "Failed to perform TIOCGPTPEER io"..., 36Failed to perform TIOCGPTPEER ioctl
) = 36
close(3)                                = 0
umount2("/dev/pts", 0)                  = 0
umount2("/dev/ptmx", 0)                 = 0
mkdir("/tmp/devpts_fs_w22bR6", 0700)    = 0
mount("devpts", "/tmp/devpts_fs_w22bR6", "devpts", MS_NOSUID|MS_NOEXEC, "newinstance,ptmxmode=0666,mode=0"...) = 0
open("/tmp/devpts_fs_w22bR6/ptmx", O_RDWR|O_NOCTTY|O_CLOEXEC) = 3
ioctl(3, TIOCSPTLCK, [0])               = 0
ioctl(3, _IOC(0, 0x54, 0x41, 0x00), 0x80102) = 4
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f459d3319d0) = 4378
wait4(4378, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 4378
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=4378, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
close(3)                                = 0
close(4)                                = 0
unlink("/tmp/devpts_fs_w22bR6")         = -1 EISDIR (Is a directory)
exit_group(0)                           = ?
+++ exited with 0 +++
root@intel-core2-32:~# 

 tools/testing/selftests/filesystems/Makefile     | 1 +
 tools/testing/selftests/filesystems/devpts_pts.c | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

-- 
2.11.0

Comments

Christian Brauner May 2, 2018, 2:05 p.m. | #1
On Wed, Apr 18, 2018 at 09:52:55AM +0200, Anders Roxell wrote:
> We were picking up the wrong header should use asm/ioctls.h form the kernel

> and not the header from the system (sys/ioctl.h). In the current code we

> added the correct include and we added the kernel headers path to the CFLAGS.

>

> Fixes: ce290a19609d ("selftests: add devpts selftests")

> Signed-off-by: Anders Roxell <anders.roxell@linaro.org>

> ---


Acked-by: Christian Brauner <christian.brauner@ubuntu.com>


Patch looks good to me.

I'm going to look into the ioctl() error.

Thanks!
Christian

>

> Hi,

>

> I've been running devpts_pts on a mainline kernel (4.16+git0+60cc43fc88) and




> the verify_invalid_ptmx_bind_mount() test failes with this failure:

>

> root@intel-core2-32:~# ./devpts_pts

> Failed to perform TIOCGPTPEER ioctl

>

> However, I'm still confused why I'm not able to get the test to pass.  Strace

> showes that -ENOENT return in the TIOCGPTPEER implementation in the

> kernel. I think the -ENOENT gets returned from this path

> devpts_mntget()->devpts_ptmx_path->path_pts().

>

> See the strace issue below:

> root@intel-core2-32:~# strace ./devpts_pts

> execve("./devpts_pts", ["./devpts_pts"], [/* 17 vars */]) = 0

> brk(NULL)                               = 0x5634e0092000

> mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f459d338000

> access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)

> open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3

> fstat(3, {st_mode=S_IFREG|0644, st_size=16726, ...}) = 0

> mmap(NULL, 16726, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f459d333000

> close(3)                                = 0

> open("/lib/libc.so.6", O_RDONLY|O_CLOEXEC) = 3

> read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\260\3\2\0\0\0\0\0"..., 832) = 832

> fstat(3, {st_mode=S_IFREG|0755, st_size=1681056, ...}) = 0

> mmap(NULL, 3787168, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f459cd7b000

> mprotect(0x7f459cf0f000, 2093056, PROT_NONE) = 0

> mmap(0x7f459d10e000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x193000) = 0x7f459d10e000

> mmap(0x7f459d114000, 14752, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f459d114000

> close(3)                                = 0

> mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f459d331000

> arch_prctl(ARCH_SET_FS, 0x7f459d331700) = 0

> mprotect(0x7f459d10e000, 16384, PROT_READ) = 0

> mprotect(0x5634debe3000, 4096, PROT_READ) = 0

> mprotect(0x7f459d33a000, 4096, PROT_READ) = 0

> munmap(0x7f459d333000, 16726)           = 0

> ioctl(0, TCGETS, {B38400 opost isig icanon echo ...}) = 0

> unshare(CLONE_NEWNS)                    = 0

> mount("", "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0

> mount("/dev/pts/ptmx", "/dev/ptmx", NULL, MS_BIND, NULL) = 0

> open("/dev/ptmx", O_RDWR|O_NOCTTY|O_CLOEXEC) = 3

> ioctl(3, TIOCSPTLCK, [0])               = 0

> ioctl(3, _IOC(0, 0x54, 0x41, 0x00), 0x80102) = 4

> clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f459d3319d0) = 4377

> wait4(4377, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 4377

> --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=4377, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---

> close(3)                                = 0

> close(4)                                = 0

> getpid()                                = 4376

> open("/tmp/devpts_ptmx_Z6aEvy", O_RDWR|O_CREAT|O_EXCL, 0600) = 3

> mount("/dev/pts/ptmx", "/tmp/devpts_ptmx_Z6aEvy", NULL, MS_BIND, NULL) = 0

> close(3)                                = 0

> open("/tmp/devpts_ptmx_Z6aEvy", O_RDWR|O_NOCTTY|O_CLOEXEC) = 3

> ioctl(3, TIOCSPTLCK, [0])               = 0

> ioctl(3, _IOC(0, 0x54, 0x41, 0x00), 0x80102) = -1 ENOENT (No such file or directory)

> write(2, "Failed to perform TIOCGPTPEER io"..., 36Failed to perform TIOCGPTPEER ioctl

> ) = 36

> close(3)                                = 0

> umount2("/dev/pts", 0)                  = 0

> umount2("/dev/ptmx", 0)                 = 0

> mkdir("/tmp/devpts_fs_w22bR6", 0700)    = 0

> mount("devpts", "/tmp/devpts_fs_w22bR6", "devpts", MS_NOSUID|MS_NOEXEC, "newinstance,ptmxmode=0666,mode=0"...) = 0

> open("/tmp/devpts_fs_w22bR6/ptmx", O_RDWR|O_NOCTTY|O_CLOEXEC) = 3

> ioctl(3, TIOCSPTLCK, [0])               = 0

> ioctl(3, _IOC(0, 0x54, 0x41, 0x00), 0x80102) = 4

> clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f459d3319d0) = 4378

> wait4(4378, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 4378

> --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=4378, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---

> close(3)                                = 0

> close(4)                                = 0

> unlink("/tmp/devpts_fs_w22bR6")         = -1 EISDIR (Is a directory)

> exit_group(0)                           = ?

> +++ exited with 0 +++

> root@intel-core2-32:~#

>

>  tools/testing/selftests/filesystems/Makefile     | 1 +

>  tools/testing/selftests/filesystems/devpts_pts.c | 2 +-

>  2 files changed, 2 insertions(+), 1 deletion(-)

>

> diff --git a/tools/testing/selftests/filesystems/Makefile b/tools/testing/selftests/filesystems/Makefile

> index 4e6d09fb166f..427a401aae5c 100644

> --- a/tools/testing/selftests/filesystems/Makefile

> +++ b/tools/testing/selftests/filesystems/Makefile

> @@ -1,5 +1,6 @@

>  # SPDX-License-Identifier: GPL-2.0

>  TEST_PROGS := dnotify_test devpts_pts

> +CFLAGS += -I../../../../usr/include/

>  all: $(TEST_PROGS)

>

>  include ../lib.mk

> diff --git a/tools/testing/selftests/filesystems/devpts_pts.c b/tools/testing/selftests/filesystems/devpts_pts.c

> index b9055e974289..79420b9d00c7 100644

> --- a/tools/testing/selftests/filesystems/devpts_pts.c

> +++ b/tools/testing/selftests/filesystems/devpts_pts.c

> @@ -8,7 +8,7 @@

>  #include <stdlib.h>

>  #include <string.h>

>  #include <unistd.h>

> -#include <sys/ioctl.h>

> +#include <asm/ioctls.h>

>  #include <sys/mount.h>

>  #include <sys/wait.h>

>

> --

> 2.11.0

>
Shuah Khan May 4, 2018, 7:42 p.m. | #2
On 05/02/2018 08:05 AM, Christian Brauner wrote:
> On Wed, Apr 18, 2018 at 09:52:55AM +0200, Anders Roxell wrote:

>> We were picking up the wrong header should use asm/ioctls.h form the kernel

>> and not the header from the system (sys/ioctl.h). In the current code we

>> added the correct include and we added the kernel headers path to the CFLAGS.

>>

>> Fixes: ce290a19609d ("selftests: add devpts selftests")

>> Signed-off-by: Anders Roxell <anders.roxell@linaro.org>

>> ---

> 

> Acked-by: Christian Brauner <christian.brauner@ubuntu.com>

> 

> Patch looks good to me.

> 

> I'm going to look into the ioctl() error.

> 

> Thanks!

> Christian

> 

>>

>> Hi,

>>

>> I've been running devpts_pts on a mainline kernel (4.16+git0+60cc43fc88) and

> 

> 

> 

>> the verify_invalid_ptmx_bind_mount() test failes with this failure:

>>

>> root@intel-core2-32:~# ./devpts_pts

>> Failed to perform TIOCGPTPEER ioctl

>>

>> However, I'm still confused why I'm not able to get the test to pass.  Strace

>> showes that -ENOENT return in the TIOCGPTPEER implementation in the

>> kernel. I think the -ENOENT gets returned from this path

>> devpts_mntget()->devpts_ptmx_path->path_pts().

>>

>> See the strace issue below:

>> root@intel-core2-32:~# strace ./devpts_pts

>> execve("./devpts_pts", ["./devpts_pts"], [/* 17 vars */]) = 0

>> brk(NULL)                               = 0x5634e0092000

>> mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f459d338000

>> access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)

>> open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3

>> fstat(3, {st_mode=S_IFREG|0644, st_size=16726, ...}) = 0

>> mmap(NULL, 16726, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f459d333000

>> close(3)                                = 0

>> open("/lib/libc.so.6", O_RDONLY|O_CLOEXEC) = 3

>> read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\260\3\2\0\0\0\0\0"..., 832) = 832

>> fstat(3, {st_mode=S_IFREG|0755, st_size=1681056, ...}) = 0

>> mmap(NULL, 3787168, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f459cd7b000

>> mprotect(0x7f459cf0f000, 2093056, PROT_NONE) = 0

>> mmap(0x7f459d10e000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x193000) = 0x7f459d10e000

>> mmap(0x7f459d114000, 14752, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f459d114000

>> close(3)                                = 0

>> mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f459d331000

>> arch_prctl(ARCH_SET_FS, 0x7f459d331700) = 0

>> mprotect(0x7f459d10e000, 16384, PROT_READ) = 0

>> mprotect(0x5634debe3000, 4096, PROT_READ) = 0

>> mprotect(0x7f459d33a000, 4096, PROT_READ) = 0

>> munmap(0x7f459d333000, 16726)           = 0

>> ioctl(0, TCGETS, {B38400 opost isig icanon echo ...}) = 0

>> unshare(CLONE_NEWNS)                    = 0

>> mount("", "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0

>> mount("/dev/pts/ptmx", "/dev/ptmx", NULL, MS_BIND, NULL) = 0

>> open("/dev/ptmx", O_RDWR|O_NOCTTY|O_CLOEXEC) = 3

>> ioctl(3, TIOCSPTLCK, [0])               = 0

>> ioctl(3, _IOC(0, 0x54, 0x41, 0x00), 0x80102) = 4

>> clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f459d3319d0) = 4377

>> wait4(4377, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 4377

>> --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=4377, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---

>> close(3)                                = 0

>> close(4)                                = 0

>> getpid()                                = 4376

>> open("/tmp/devpts_ptmx_Z6aEvy", O_RDWR|O_CREAT|O_EXCL, 0600) = 3

>> mount("/dev/pts/ptmx", "/tmp/devpts_ptmx_Z6aEvy", NULL, MS_BIND, NULL) = 0

>> close(3)                                = 0

>> open("/tmp/devpts_ptmx_Z6aEvy", O_RDWR|O_NOCTTY|O_CLOEXEC) = 3

>> ioctl(3, TIOCSPTLCK, [0])               = 0

>> ioctl(3, _IOC(0, 0x54, 0x41, 0x00), 0x80102) = -1 ENOENT (No such file or directory)

>> write(2, "Failed to perform TIOCGPTPEER io"..., 36Failed to perform TIOCGPTPEER ioctl

>> ) = 36

>> close(3)                                = 0

>> umount2("/dev/pts", 0)                  = 0

>> umount2("/dev/ptmx", 0)                 = 0

>> mkdir("/tmp/devpts_fs_w22bR6", 0700)    = 0

>> mount("devpts", "/tmp/devpts_fs_w22bR6", "devpts", MS_NOSUID|MS_NOEXEC, "newinstance,ptmxmode=0666,mode=0"...) = 0

>> open("/tmp/devpts_fs_w22bR6/ptmx", O_RDWR|O_NOCTTY|O_CLOEXEC) = 3

>> ioctl(3, TIOCSPTLCK, [0])               = 0

>> ioctl(3, _IOC(0, 0x54, 0x41, 0x00), 0x80102) = 4

>> clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f459d3319d0) = 4378

>> wait4(4378, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 4378

>> --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=4378, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---

>> close(3)                                = 0

>> close(4)                                = 0

>> unlink("/tmp/devpts_fs_w22bR6")         = -1 EISDIR (Is a directory)

>> exit_group(0)                           = ?

>> +++ exited with 0 +++

>> root@intel-core2-32:~#

>>

>>  tools/testing/selftests/filesystems/Makefile     | 1 +

>>  tools/testing/selftests/filesystems/devpts_pts.c | 2 +-

>>  2 files changed, 2 insertions(+), 1 deletion(-)

>>

>> diff --git a/tools/testing/selftests/filesystems/Makefile b/tools/testing/selftests/filesystems/Makefile

>> index 4e6d09fb166f..427a401aae5c 100644

>> --- a/tools/testing/selftests/filesystems/Makefile

>> +++ b/tools/testing/selftests/filesystems/Makefile

>> @@ -1,5 +1,6 @@

>>  # SPDX-License-Identifier: GPL-2.0

>>  TEST_PROGS := dnotify_test devpts_pts

>> +CFLAGS += -I../../../../usr/include/

>>  all: $(TEST_PROGS)

>>

>>  include ../lib.mk

>> diff --git a/tools/testing/selftests/filesystems/devpts_pts.c b/tools/testing/selftests/filesystems/devpts_pts.c

>> index b9055e974289..79420b9d00c7 100644

>> --- a/tools/testing/selftests/filesystems/devpts_pts.c

>> +++ b/tools/testing/selftests/filesystems/devpts_pts.c

>> @@ -8,7 +8,7 @@

>>  #include <stdlib.h>

>>  #include <string.h>

>>  #include <unistd.h>

>> -#include <sys/ioctl.h>

>> +#include <asm/ioctls.h>

>>  #include <sys/mount.h>

>>  #include <sys/wait.h>

>>

>> --

>> 2.11.0

>>

> 


Thanks. I will queue this up for 4.18-rc1

-- Shuah
Shuah Khan May 10, 2018, 5:26 p.m. | #3
On 05/04/2018 01:42 PM, Shuah Khan wrote:
> On 05/02/2018 08:05 AM, Christian Brauner wrote:

>> On Wed, Apr 18, 2018 at 09:52:55AM +0200, Anders Roxell wrote:

>>> We were picking up the wrong header should use asm/ioctls.h form the kernel

>>> and not the header from the system (sys/ioctl.h). In the current code we

>>> added the correct include and we added the kernel headers path to the CFLAGS.

>>>

>>> Fixes: ce290a19609d ("selftests: add devpts selftests")

>>> Signed-off-by: Anders Roxell <anders.roxell@linaro.org>

>>> ---

>>

>> Acked-by: Christian Brauner <christian.brauner@ubuntu.com>

>>

>> Patch looks good to me.

>>

>> I'm going to look into the ioctl() error.

>>

>> Thanks!

>> Christian

>>

>>>

>>> Hi,

>>>

>>> I've been running devpts_pts on a mainline kernel (4.16+git0+60cc43fc88) and

>>

>>

>>

>>> the verify_invalid_ptmx_bind_mount() test failes with this failure:

>>>

>>> root@intel-core2-32:~# ./devpts_pts

>>> Failed to perform TIOCGPTPEER ioctl

>>>

>>> However, I'm still confused why I'm not able to get the test to pass.  Strace

>>> showes that -ENOENT return in the TIOCGPTPEER implementation in the

>>> kernel. I think the -ENOENT gets returned from this path

>>> devpts_mntget()->devpts_ptmx_path->path_pts().

>>>

>>> See the strace issue below:

>>> root@intel-core2-32:~# strace ./devpts_pts

>>> execve("./devpts_pts", ["./devpts_pts"], [/* 17 vars */]) = 0

>>> brk(NULL)                               = 0x5634e0092000

>>> mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f459d338000

>>> access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)

>>> open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3

>>> fstat(3, {st_mode=S_IFREG|0644, st_size=16726, ...}) = 0

>>> mmap(NULL, 16726, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f459d333000

>>> close(3)                                = 0

>>> open("/lib/libc.so.6", O_RDONLY|O_CLOEXEC) = 3

>>> read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\260\3\2\0\0\0\0\0"..., 832) = 832

>>> fstat(3, {st_mode=S_IFREG|0755, st_size=1681056, ...}) = 0

>>> mmap(NULL, 3787168, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f459cd7b000

>>> mprotect(0x7f459cf0f000, 2093056, PROT_NONE) = 0

>>> mmap(0x7f459d10e000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x193000) = 0x7f459d10e000

>>> mmap(0x7f459d114000, 14752, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f459d114000

>>> close(3)                                = 0

>>> mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f459d331000

>>> arch_prctl(ARCH_SET_FS, 0x7f459d331700) = 0

>>> mprotect(0x7f459d10e000, 16384, PROT_READ) = 0

>>> mprotect(0x5634debe3000, 4096, PROT_READ) = 0

>>> mprotect(0x7f459d33a000, 4096, PROT_READ) = 0

>>> munmap(0x7f459d333000, 16726)           = 0

>>> ioctl(0, TCGETS, {B38400 opost isig icanon echo ...}) = 0

>>> unshare(CLONE_NEWNS)                    = 0

>>> mount("", "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0

>>> mount("/dev/pts/ptmx", "/dev/ptmx", NULL, MS_BIND, NULL) = 0

>>> open("/dev/ptmx", O_RDWR|O_NOCTTY|O_CLOEXEC) = 3

>>> ioctl(3, TIOCSPTLCK, [0])               = 0

>>> ioctl(3, _IOC(0, 0x54, 0x41, 0x00), 0x80102) = 4

>>> clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f459d3319d0) = 4377

>>> wait4(4377, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 4377

>>> --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=4377, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---

>>> close(3)                                = 0

>>> close(4)                                = 0

>>> getpid()                                = 4376

>>> open("/tmp/devpts_ptmx_Z6aEvy", O_RDWR|O_CREAT|O_EXCL, 0600) = 3

>>> mount("/dev/pts/ptmx", "/tmp/devpts_ptmx_Z6aEvy", NULL, MS_BIND, NULL) = 0

>>> close(3)                                = 0

>>> open("/tmp/devpts_ptmx_Z6aEvy", O_RDWR|O_NOCTTY|O_CLOEXEC) = 3

>>> ioctl(3, TIOCSPTLCK, [0])               = 0

>>> ioctl(3, _IOC(0, 0x54, 0x41, 0x00), 0x80102) = -1 ENOENT (No such file or directory)

>>> write(2, "Failed to perform TIOCGPTPEER io"..., 36Failed to perform TIOCGPTPEER ioctl

>>> ) = 36

>>> close(3)                                = 0

>>> umount2("/dev/pts", 0)                  = 0

>>> umount2("/dev/ptmx", 0)                 = 0

>>> mkdir("/tmp/devpts_fs_w22bR6", 0700)    = 0

>>> mount("devpts", "/tmp/devpts_fs_w22bR6", "devpts", MS_NOSUID|MS_NOEXEC, "newinstance,ptmxmode=0666,mode=0"...) = 0

>>> open("/tmp/devpts_fs_w22bR6/ptmx", O_RDWR|O_NOCTTY|O_CLOEXEC) = 3

>>> ioctl(3, TIOCSPTLCK, [0])               = 0

>>> ioctl(3, _IOC(0, 0x54, 0x41, 0x00), 0x80102) = 4

>>> clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f459d3319d0) = 4378

>>> wait4(4378, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 4378

>>> --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=4378, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---

>>> close(3)                                = 0

>>> close(4)                                = 0

>>> unlink("/tmp/devpts_fs_w22bR6")         = -1 EISDIR (Is a directory)

>>> exit_group(0)                           = ?

>>> +++ exited with 0 +++

>>> root@intel-core2-32:~#

>>>

>>>  tools/testing/selftests/filesystems/Makefile     | 1 +

>>>  tools/testing/selftests/filesystems/devpts_pts.c | 2 +-

>>>  2 files changed, 2 insertions(+), 1 deletion(-)

>>>

>>> diff --git a/tools/testing/selftests/filesystems/Makefile b/tools/testing/selftests/filesystems/Makefile

>>> index 4e6d09fb166f..427a401aae5c 100644

>>> --- a/tools/testing/selftests/filesystems/Makefile

>>> +++ b/tools/testing/selftests/filesystems/Makefile

>>> @@ -1,5 +1,6 @@

>>>  # SPDX-License-Identifier: GPL-2.0

>>>  TEST_PROGS := dnotify_test devpts_pts

>>> +CFLAGS += -I../../../../usr/include/

>>>  all: $(TEST_PROGS)

>>>

>>>  include ../lib.mk

>>> diff --git a/tools/testing/selftests/filesystems/devpts_pts.c b/tools/testing/selftests/filesystems/devpts_pts.c

>>> index b9055e974289..79420b9d00c7 100644

>>> --- a/tools/testing/selftests/filesystems/devpts_pts.c

>>> +++ b/tools/testing/selftests/filesystems/devpts_pts.c

>>> @@ -8,7 +8,7 @@

>>>  #include <stdlib.h>

>>>  #include <string.h>

>>>  #include <unistd.h>

>>> -#include <sys/ioctl.h>

>>> +#include <asm/ioctls.h>

>>>  #include <sys/mount.h>

>>>  #include <sys/wait.h>

>>>

>>> --

>>> 2.11.0

>>>

>>

> 

> Thanks. I will queue this up for 4.18-rc1

> 

> -- Shuah

> 


Applied to linux-kselftest next for 4.18-rc1.

thanks,
-- Shuah

Patch

diff --git a/tools/testing/selftests/filesystems/Makefile b/tools/testing/selftests/filesystems/Makefile
index 4e6d09fb166f..427a401aae5c 100644
--- a/tools/testing/selftests/filesystems/Makefile
+++ b/tools/testing/selftests/filesystems/Makefile
@@ -1,5 +1,6 @@ 
 # SPDX-License-Identifier: GPL-2.0
 TEST_PROGS := dnotify_test devpts_pts
+CFLAGS += -I../../../../usr/include/
 all: $(TEST_PROGS)
 
 include ../lib.mk
diff --git a/tools/testing/selftests/filesystems/devpts_pts.c b/tools/testing/selftests/filesystems/devpts_pts.c
index b9055e974289..79420b9d00c7 100644
--- a/tools/testing/selftests/filesystems/devpts_pts.c
+++ b/tools/testing/selftests/filesystems/devpts_pts.c
@@ -8,7 +8,7 @@ 
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
-#include <sys/ioctl.h>
+#include <asm/ioctls.h>
 #include <sys/mount.h>
 #include <sys/wait.h>