Hi, all,
I'm seeing weird issue with MMC ioctl.
I've modified mmc-util package a bit, to set write-protection to user data
area, using following argument.
idata.write_flag = 1;
idata.opcode = 28; // MMC_SET_WRITE_PROT
idata.arg = ... // 512B sector address
...
idata.flags = MMC_RSP_R1B | MMC_CMD_AC;
// As I remember, "MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC" shows no
difference.
If I execute the program, it returns "ioctl: Connection timed out" error, and
dmesg shows following.
[ 67.252710] sdhci-pci 0000:01:1b.0: mmc_blk_ioctl_cmd: cmd error -110
But if I run "fdisk -l /dev/mmcblk0" command before the execution, it works...
no error occurs and write protection works..
Have you seen similar issue like this? fdisk command affects MMC flash status?
FYI, I'm using 2.6.35 kernel (MMC ioctl command support and some features are
backported).
===========================================================================
strace output for ioctl timeout error
===========================================================================
./strace ./mmc-util userwriteprotect set /dev/mmcblk0
execve("./mmc-util", ["./mmc-util", "userwriteprotect", "set", "/dev/mmcblk0"],
[/* 12 vars */]) = 0
brk(0) = 0x804e000
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7783a000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("./tls/i686/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
open("./tls/i686/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
open("./tls/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
open("./tls/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
open("./i686/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
open("./i686/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
open("./sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
open("./libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/local/lib/tls/i686/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such
file or directory)
stat64("/usr/local/lib/tls/i686/sse2", 0x7f9e5c14) = -1 ENOENT (No such file or
directory)
open("/usr/local/lib/tls/i686/libc.so.6", O_RDONLY) = -1 ENOENT (No such file
or directory)
stat64("/usr/local/lib/tls/i686", 0x7f9e5c14) = -1 ENOENT (No such file or
directory)
open("/usr/local/lib/tls/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file
or directory)
stat64("/usr/local/lib/tls/sse2", 0x7f9e5c14) = -1 ENOENT (No such file or
directory)
open("/usr/local/lib/tls/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/usr/local/lib/tls", 0x7f9e5c14) = -1 ENOENT (No such file or directory)
open("/usr/local/lib/i686/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file
or directory)
stat64("/usr/local/lib/i686/sse2", 0x7f9e5c14) = -1 ENOENT (No such file or
directory)
open("/usr/local/lib/i686/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/usr/local/lib/i686", 0x7f9e5c14) = -1 ENOENT (No such file or
directory)
open("/usr/local/lib/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/usr/local/lib/sse2", 0x7f9e5c14) = -1 ENOENT (No such file or
directory)
open("/usr/local/lib/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/usr/local/lib", {st_mode=S_IFDIR|0775, st_size=4096, ...}) = 0
open("/usr/lib/tls/i686/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/usr/lib/tls/i686/sse2", 0x7f9e5c14) = -1 ENOENT (No such file or
directory)
open("/usr/lib/tls/i686/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/usr/lib/tls/i686", 0x7f9e5c14) = -1 ENOENT (No such file or directory)
open("/usr/lib/tls/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/usr/lib/tls/sse2", 0x7f9e5c14) = -1 ENOENT (No such file or directory)
open("/usr/lib/tls/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/usr/lib/tls", 0x7f9e5c14) = -1 ENOENT (No such file or directory)
open("/usr/lib/i686/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/usr/lib/i686/sse2", 0x7f9e5c14) = -1 ENOENT (No such file or directory)
open("/usr/lib/i686/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/usr/lib/i686", 0x7f9e5c14) = -1 ENOENT (No such file or directory)
open("/usr/lib/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/usr/lib/sse2", 0x7f9e5c14) = -1 ENOENT (No such file or directory)
open("/usr/lib/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/usr/lib", {st_mode=S_IFDIR|0775, st_size=12288, ...}) = 0
open("/lib/tls/i686/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/lib/tls/i686/sse2", 0x7f9e5c14) = -1 ENOENT (No such file or directory)
open("/lib/tls/i686/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/lib/tls/i686", 0x7f9e5c14) = -1 ENOENT (No such file or directory)
open("/lib/tls/sse2/libc.s[ 67.252710] sdhci-pci 0000:01:1b.0:
mmc_blk_ioctl_cmd: cmd error -110
o.6", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/lib/tls/sse2", 0x7f9e5c14) = -1 ENOENT (No such file or directory)
open("/lib/tls/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/lib/tls", 0x7f9e5c14) = -1 ENOENT (No such file or directory)
open("/lib/i686/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/lib/i686/sse2", 0x7f9e5c14) = -1 ENOENT (No such file or directory)
open("/lib/i686/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/lib/i686", 0x7f9e5c14) = -1 ENOENT (No such file or directory)
open("/lib/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/lib/sse2", 0x7f9e5c14) = -1 ENOENT (No such file or directory)
open("/lib/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\340l\1\0004\0\0\0"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0775, st_size=8840761, ...}) = 0
mmap2(NULL, 1345928, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x776f1000
mmap2(0x77834000, 12288, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x142) = 0x77834000
mmap2(0x77837000, 10632, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x77837000
close(3) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x776f0000
set_thread_area({entry_number:-1 -> 6, base_addr:0x776f06c0, limit:1048575,
seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0,
useable:1}) = 0
mprotect(0x77834000, 8192, PROT_READ) = 0
mprotect(0x77857000, 4096, PROT_READ) = 0
brk(0) = 0x804e000
brk(0x806f000) = 0x806f000
open("/dev/mmcblk0", O_RDWR|O_LARGEFILE) = 3
ioctl(3, 0xc048b300, 0x7f9e60f4) = -1 ETIMEDOUT (Connection timed out)
dup(2) = 4
fcntl64(4, F_GETFL) = 0x2 (flags O_RDWR)
fstat64(4, {st_mode=S_IFCHR|0600, st_rdev=makedev(5, 1), ...}) = 0
ioctl(4, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
{B115200 opost isig icanon echo ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x776ef000
_llseek(4, 0, 0x7f9e5f70, SEEK_CUR) = -1 ESPIPE (Illegal seek)
write(4, "ioctl: Connection timed out\n", 28ioctl: Connection timed out
) = 28
close(4) = 0
munmap(0x776ef000, 4096) = 0
write(2, "Could not write\n", 16Could not write
) = 16
exit_group(1) = ?
===========================================================================
strace output for success (after fdisk command)
===========================================================================
./strace ./mmc-util userwriteprotect set /dev/mmcblk0
execve("./mmc-util", ["./mmc-util", "userwriteprotect", "set", "/dev/mmcblk0"],
[/* 12 vars */]) = 0
brk(0) = 0x804e000
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x778d1000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("./tls/i686/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
open("./tls/i686/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
open("./tls/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
open("./tls/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
open("./i686/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
open("./i686/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
open("./sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
open("./libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/local/lib/tls/i686/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such
file or directory)
stat64("/usr/local/lib/tls/i686/sse2", 0x7fefe144) = -1 ENOENT (No such file or
directory)
open("/usr/local/lib/tls/i686/libc.so.6", O_RDONLY) = -1 ENOENT (No such file
or directory)
stat64("/usr/local/lib/tls/i686", 0x7fefe144) = -1 ENOENT (No such file or
directory)
open("/usr/local/lib/tls/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file
or directory)
stat64("/usr/local/lib/tls/sse2", 0x7fefe144) = -1 ENOENT (No such file or
directory)
open("/usr/local/lib/tls/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/usr/local/lib/tls", 0x7fefe144) = -1 ENOENT (No such file or directory)
open("/usr/local/lib/i686/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file
or directory)
stat64("/usr/local/lib/i686/sse2", 0x7fefe144) = -1 ENOENT (No such file or
directory)
open("/usr/local/lib/i686/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/usr/local/lib/i686", 0x7fefe144) = -1 ENOENT (No such file or
directory)
open("/usr/local/lib/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/usr/local/lib/sse2", 0x7fefe144) = -1 ENOENT (No such file or
directory)
open("/usr/local/lib/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/usr/local/lib", {st_mode=S_IFDIR|0775, st_size=4096, ...}) = 0
open("/usr/lib/tls/i686/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/usr/lib/tls/i686/sse2", 0x7fefe144) = -1 ENOENT (No such file or
directory)
open("/usr/lib/tls/i686/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/usr/lib/tls/i686", 0x7fefe144) = -1 ENOENT (No such file or directory)
open("/usr/lib/tls/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/usr/lib/tls/sse2", 0x7fefe144) = -1 ENOENT (No such file or directory)
open("/usr/lib/tls/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/usr/lib/tls", 0x7fefe144) = -1 ENOENT (No such file or directory)
open("/usr/lib/i686/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/usr/lib/i686/sse2", 0x7fefe144) = -1 ENOENT (No such file or directory)
open("/usr/lib/i686/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/usr/lib/i686", 0x7fefe144) = -1 ENOENT (No such file or directory)
open("/usr/lib/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/usr/lib/sse2", 0x7fefe144) = -1 ENOENT (No such file or directory)
open("/usr/lib/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/usr/lib", {st_mode=S_IFDIR|0775, st_size=12288, ...}) = 0
open("/lib/tls/i686/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/lib/tls/i686/sse2", 0x7fefe144) = -1 ENOENT (No such file or directory)
open("/lib/tls/i686/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/lib/tls/i686", 0x7fefe144) = -1 ENOENT (No such file or directory)
open("/lib/tls/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/lib/tls/sse2", 0x7fefe144) = -1 ENOENT (No such file or directory)
open("/lib/tls/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/lib/tls", 0x7fefe144) = -1 ENOENT (No such file or directory)
open("/lib/i686/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or
directory)
stat64("/lib/i686/sse2", 0x7fefe144) = -1 ENOENT (No such file or directory)
open("/lib/i686/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/lib/i686", 0x7fefe144) = -1 ENOENT (No such file or directory)
open("/lib/sse2/libc.so.6", O_RDONLY) = -1 ENOENT (No such file or directory)
stat64("/lib/sse2", 0x7fefe144) = -1 ENOENT (No such file or directory)
open("/lib/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\340l\1\0004\0\0\0"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0775, st_size=8840761, ...}) = 0
mmap2(NULL, 1345928, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x77788000
mmap2(0x778cb000, 12288, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x142) = 0x778cb000
mmap2(0x778ce000, 10632, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x778ce000
close(3) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x77787000
set_thread_area({entry_number:-1 -> 6, base_addr:0x777876c0, limit:1048575,
seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0,
useable:1}) = 0
mprotect(0x778cb000, 8192, PROT_READ) = 0
mprotect(0x778ee000, 4096, PROT_READ) = 0
brk(0) = 0x804e000
brk(0x806f000) = 0x806f000
open("/dev/mmcblk0", O_RDWR|O_LARGEFILE) = 3
ioctl(3, 0xc048b300, 0x7fefe624) = 0
exit_group(0) = ?
