f2fs-tools: fix cannot get bdev information
Some device like android phone doesn't show the dev number path in
/dev/block/, for example:
$ ls /dev/block/
bootdevice dm-6 loop24 loop43 ram13 sda5 sdd4 sde24 sde43 sde62 sdf1
by-name dm-7 loop25 loop44 ram14 sda6 sdd5 sde25 sde44 sde63 sdf10
dm-0 dm-8 loop26 loop45 ram15 sda7 sdd6 sde26 sde45 sde64 sdf11
dm-1 dm-9 loop27 loop46 ram2 sda8 sdd7 sde27 sde46 sde65 sdf12
dm-10 loop0 loop28 loop47 ram3 sda9 sde sde28 sde47 sde66 sdf13
dm-11 loop1 loop29 loop48 ram4 sdb sde1 sde29 sde48 sde67 sdf14
dm-12 loop10 loop3 loop49 ram5 sdb1 sde10 sde3 sde49 sde68 sdf15
dm-13 loop11 loop30 loop5 ram6 sdb2 sde11 sde30 sde5 sde69 sdf16
dm-14 loop12 loop31 loop50 ram7 sdb3 sde12 sde31 sde50 sde7 sdf17
dm-15 loop13 loop32 loop51 ram8 sdb4 sde13 sde32 sde51 sde70 sdf18
dm-16 loop14 loop33 loop6 ram9 sdb5 sde14 sde33 sde52 sde71 sdf19
dm-17 loop15 loop34 loop7 sda sdc sde15 sde34 sde53 sde72 sdf2
dm-18 loop16 loop35 loop8 sda1 sdc1 sde16 sde35 sde54 sde73 sdf3
dm-19 loop17 loop36 loop9 sda10 sdc2 sde17 sde36 sde55 sde74 sdf4
dm-2 loop18 loop37 mapper sda11 sdc3 sde18 sde37 sde56 sde75 sdf5
dm-20 loop19 loop38 platform sda12 sdc4 sde19 sde38 sde57 sde76 sdf6
dm-21 loop2 loop39 ram0 sda13 sdc5 sde2 sde39 sde58 sde77 sdf7
dm-3 loop20 loop4 ram1 sda14 sdd sde20 sde4 sde59 sde78 sdf8
dm-4 loop21 loop40 ram10 sda2 sdd1 sde21 sde40 sde6 sde8 sdf9
dm-5 loop22 loop41 ram11 sda3 sdd2 sde22 sde41 sde60 sde9 vold
dm-53 loop23 loop42 ram12 sda4 sdd3 sde23 sde42 sde61 sdf zram0
this will cause stat_bdev cannot show bdev information.
But most of devices (include android) show dev number path in /sys/dev/block, for example:
$ ls /sys/dev/block
1:0 254:1 254:6 259:21 259:38 259:54 7:104 7:24 7:368 8:11 8:4 8:70 8:87
1:1 254:10 254:7 259:22 259:39 259:55 7:112 7:240 7:376 8:12 8:48 8:71 8:88
1:10 254:11 254:8 259:23 259:4 259:56 7:120 7:248 7:384 8:13 8:49 8:72 8:89
1:11 254:12 254:9 259:24 259:40 259:57 7:128 7:256 7:392 8:14 8:5 8:73 8:9
1:12 254:13 259:0 259:25 259:41 259:58 7:136 7:264 7:40 8:16 8:50 8:74 8:90
1:13 254:14 259:1 259:26 259:42 259:59 7:144 7:272 7:400 8:17 8:51 8:75 8:91
1:14 254:15 259:10 259:27 259:43 259:6 7:152 7:280 7:408 8:18 8:52 8:76 8:92
1:15 254:16 259:11 259:28 259:44 259:60 7:16 7:288 7:48 8:19 8:53 8:77 8:93
1:2 254:17 259:12 259:29 259:45 259:61 7:160 7:296 7:56 8:2 8:54 8:78 8:94
1:3 254:18 259:13 259:3 259:46 259:62 7:168 7:304 7:64 8:20 8:55 8:79 8:95
1:4 254:19 259:14 259:30 259:47 259:63 7:176 7:312 7:72 8:21 8:6 8:8
1:5 254:2 259:15 259:31 259:48 259:64 7:184 7:32 7:8 8:3 8:64 8:80
1:6 254:20 259:16 259:32 259:49 259:65 7:192 7:320 7:80 8:32 8:65 8:81
1:7 254:21 259:17 259:33 259:5 259:66 7:200 7:328 7:88 8:33 8:66 8:82
1:8 254:3 259:18 259:34 259:50 259:7 7:208 7:336 7:96 8:34 8:67 8:83
1:9 254:4 259:19 259:35 259:51 259:8 7:216 7:344 8:0 8:35 8:68 8:84
253:0 254:5 259:2 259:36 259:52 259:9 7:224 7:352 8:1 8:36 8:69 8:85
254:0 254:53 259:20 259:37 259:53 7:0 7:232 7:360 8:10 8:37 8:7 8:86
so change the access path from /dev/block to /sys/dev/block
(same method of libudev)
Before:
$./f2fs.fibmap testfile_4k
----------------file info-------------------
testfile_4k :
--------------------------------------------
dev [254:53]
ino [0x 3dda : 15834]
mode [0x 81b6 : 33206]
nlink [0x 1 : 1]
uid [0x 0 : 0]
gid [0x 0 : 0]
size [0x 40000 : 262144]
blksize [0x 1000 : 4096]
blocks [0x 200 : 512]
--------------------------------------------
file_pos start_blk end_blk blks
0 2256926 2256987 62
253952 2150337 2150338 2
Patched:
$./f2fs.fibmap testfile_4k
----------------bdev info-------------------
devname = 254:53
start_lba = 0
----------------file info-------------------
testfile_4k :
--------------------------------------------
dev [254:53]
ino [0x 3dda : 15834]
mode [0x 81b6 : 33206]
nlink [0x 1 : 1]
uid [0x 0 : 0]
gid [0x 0 : 0]
size [0x 40000 : 262144]
blksize [0x 1000 : 4096]
blocks [0x 200 : 512]
--------------------------------------------
file_pos start_blk end_blk blks
0 2256926 2256987 62
253952 2150337 2150338 2
Signed-off-by: Ben Chang <ben.chang@sonicsky.net>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
1 file changed
