* nfs client deny execute access to QNX nfs server temperally
@ 2021-09-28 2:11 Hong Jiu Jin
0 siblings, 0 replies; only message in thread
From: Hong Jiu Jin @ 2021-09-28 2:11 UTC (permalink / raw)
To: linux-nfs
Hi Guys,
We meet below issue which need all of you help.
-Question
1、Recently We meet one confuse issue. Sometimes android java application
file.exsits will return false even ls -al can successflly list
/data/vendor/nfs/mount/DVR/media/dvr_sdcard0/nfs_ready.flag.file.
file permission is -rw-rw-rw-
2、We use native C++ application access api to access that file, it can
successfully access file too.
If restart device, the issue remains the same and can not recover. If
mannually chmod 777 to
/data/vendor/nfs/mount/DVR/media/dvr_sdcard0/nfs_ready.flag.file,
application will successfully access.
If restart device again, nfs_ready.flag.file will restore to 666
(-rw-rw-rw-）and Java application can successfully access too. We feel
confused why it happened.
3、After add sunrpc debug to kernel, we found that nfs permission denied in
nfs_execute_ok(-EACCES). You can read trace log in below.
Java API File exisit:
sa8155_v35:/ # dmesg
[ 168.383021] NFS call access
[ 168.383906] NFS: nfs_update_inode(0:30/2525216000 fh_crc=0x69ed2ad0 ct=2
info=0x27e7f)
[ 168.383911] NFS reply access: 0
[ 168.383916] NFS: permission(0:30/2525216000), mask=0x1, res=0
[ 168.383939] NFS call lookup media
[ 168.384801] NFS: nfs_update_inode(0:30/2525216000 fh_crc=0x69ed2ad0 ct=2
info=0x27e7f)
[ 168.384809] NFS reply lookup: 0
[ 168.384814] NFS: nfs_update_inode(0:30/42757 fh_crc=0x9466d356 ct=1
info=0x27e7f)
[ 168.384822] NFS: nfs_lookup_revalidate_done(/media) is valid
[ 168.384829] NFS call access
[ 168.385694] NFS: nfs_update_inode(0:30/42757 fh_crc=0x9466d356 ct=1
info=0x27e7f)
[ 168.385699] NFS reply access: 0
[ 168.385703] NFS: permission(0:30/42757), mask=0x1, res=-13
[ 168.578734] NFS: nfs_weak_revalidate: inode 2525216000 is valid
sa8155_v35:/ # ls -al
/data/vendor/nfs/mount/DVR/media/dvr_sdcard0/nfs_ready.flag.file
[ 127.410222] NFS call access
[ 127.411278] NFS: nfs_update_inode(0:30/2525216000 fh_crc=0x69ed2ad0 ct=2
info=0x27e7f)
[ 127.411283] NFS reply access: 0
[ 127.411984] NFS: permission(0:30/2525216000), mask=0x1, res=0
[ 127.412003] NFS: lookup(/media)
[ 127.412008] NFS call lookup media
[ 127.412562] NFS: nfs_update_inode(0:30/2525216000 fh_crc=0x69ed2ad0 ct=2
info=0x27e7f)
[ 127.412566] NFS reply lookup: 0
[ 127.412576] NFS: nfs_fhget(0:30/42757 fh_crc=0x9466d356 ct=1)
[ 127.412585] NFS call access
[ 127.423788] NFS: nfs_update_inode(0:30/42757 fh_crc=0x9466d356 ct=1
info=0x27e7f)
[ 127.423794] NFS reply access: 0
[ 127.423961] NFS: permission(0:30/42757), mask=0x1, res=0
[ 127.423970] NFS: lookup(media/dvr_sdcard0)
[ 127.423974] NFS call lookup dvr_sdcard0
[ 127.424645] NFS: nfs_update_inode(0:30/42757 fh_crc=0x9466d356 ct=1
info=0x27e7f)
[ 127.424649] NFS reply lookup: 0
[ 127.424659] NFS: nfs_fhget(0:30/128 fh_crc=0x8bcac245 ct=1)
[ 127.424668] NFS call lookup dvr_sdcard0
[ 127.425141] NFS: nfs_update_inode(0:30/42757 fh_crc=0x9466d356 ct=1
info=0x27e7f)
[ 127.425145] NFS reply lookup: 0
[ 127.425160] --> nfs_xdev_mount()
[ 127.425260] NFS call fsinfo
[ 127.425783] NFS reply fsinfo: 0
[ 127.425788] NFS call pathconf
[ 127.426159] NFS reply pathconf: -521
[ 127.428048] do_proc_get_root: call fsinfo
[ 127.428802] do_proc_get_root: reply fsinfo: 0
[ 127.428814] NFS: nfs_fhget(0:31/128 fh_crc=0x8bcac245 ct=1)
[ 127.428827] <-- nfs_xdev_mount() = 0
[ 127.429219] NFS call access
[ 127.429890] NFS: nfs_update_inode(0:31/128 fh_crc=0x8bcac245 ct=2
info=0x27e7f)
[ 127.429895] NFS reply access: 0
[ 127.429900] NFS: permission(0:31/128), mask=0x1, res=0
[ 127.429908] NFS: lookup(/nfs_ready.flag.file)
[ 127.429912] NFS call lookup nfs_ready.flag.file
[ 127.432195] NFS: nfs_update_inode(0:31/128 fh_crc=0x8bcac245 ct=2
info=0x27e7f)
[ 127.432201] NFS reply lookup: 0
[ 127.432226] NFS: nfs_fhget(0:31/261 fh_crc=0xae0e68a5 ct=1)
[ 127.432252] NFS: dentry_delete(/nfs_ready.flag.file, 40088c)
[ 127.433273] ls (10174) used greatest stack depth: 10480 bytes left
[ 128.260482] NFS: nfs_weak_revalidate: inode 2525216000 is valid
[ 129.308862] NFS: nfs_weak_revalidate: inode 2525216000 is valid
HAL C++ File API:
[ 285.296718] NFS call fsstat
[ 285.297643] NFS reply fsstat: 0
[ 285.297670] NFS: permission(0:30/2525216000), mask=0x1, res=0
[ 285.297676] NFS call lookup media
[ 285.298436] NFS: nfs_update_inode(0:30/2525216000 fh_crc=0x69ed2ad0 ct=2
info=0x27e7f)
[ 285.298441] NFS reply lookup: 0
[ 285.298445] NFS: nfs_update_inode(0:30/42757 fh_crc=0x9466d356 ct=1
info=0x27e7f)
[ 285.298450] NFS: nfs_lookup_revalidate_done(/media) is valid
[ 285.298455] NFS: permission(0:30/42757), mask=0x1, res=0
[ 285.298461] NFS call lookup dvr_sdcard0
[ 285.299099] NFS: nfs_update_inode(0:30/42757 fh_crc=0x9466d356 ct=1
info=0x27e7f)
[ 285.299103] NFS reply lookup: 0
[ 285.299107] NFS: nfs_update_inode(0:30/128 fh_crc=0x8bcac245 ct=1
info=0x27e7f)
[ 285.299111] NFS: nfs_lookup_revalidate_done(media/dvr_sdcard0) is valid
[ 285.299117] NFS: nfs_weak_revalidate: inode 128 is valid
[ 285.299137] NFS: permission(0:30/2525216000), mask=0x1, res=0
[ 285.299141] NFS call lookup media
[ 285.299724] NFS: nfs_update_inode(0:30/2525216000 fh_crc=0x69ed2ad0 ct=2
info=0x27e7f)
[ 285.299728] NFS reply lookup: 0
[ 285.299732] NFS: nfs_update_inode(0:30/42757 fh_crc=0x9466d356 ct=1
info=0x27e7f)
[ 285.299736] NFS: nfs_lookup_revalidate_done(/media) is valid
[ 285.299741] NFS: permission(0:30/42757), mask=0x1, res=0
[ 285.299746] NFS call lookup dvr_sdcard0
[ 285.300488] NFS: nfs_update_inode(0:30/42757 fh_crc=0x9466d356 ct=1
info=0x27e7f)
[ 285.300492] NFS reply lookup: 0
[ 285.300495] NFS: nfs_update_inode(0:30/128 fh_crc=0x8bcac245 ct=1
info=0x27e7f)
[ 285.300499] NFS: nfs_lookup_revalidate_done(media/dvr_sdcard0) is valid
[ 285.300504] NFS: nfs_weak_revalidate: inode 128 is valid
[ 285.300511] NFS call fsstat
[ 285.302187] NFS reply fsstat: 0
[ 285.327504] NFS: nfs_weak_revalidate: inode 2525216000 is valid
[ 285.327556] NFS: nfs_weak_revalidate: inode 2525216000 is valid
[ 285.327570] NFS call fsstat
[ 285.328683] NFS reply fsstat: 0
[ 285.328734] NFS: permission(0:30/2525216000), mask=0x1, res=0
[ 285.328764] NFS call lookup media
[ 285.329636] NFS: nfs_update_inode(0:30/2525216000 fh_crc=0x69ed2ad0 ct=2
info=0x27e7f)
[ 285.329648] NFS reply lookup: 0
[ 285.329658] NFS: nfs_update_inode(0:30/42757 fh_crc=0x9466d356 ct=1
info=0x27e7f)
[ 285.329669] NFS: nfs_lookup_revalidate_done(/media) is valid
[ 285.329681] NFS: permission(0:30/42757), mask=0x1, res=0
[ 285.329694] NFS call lookup dvr_sdcard0
[ 285.331196] NFS: nfs_update_inode(0:30/42757 fh_crc=0x9466d356 ct=1
info=0x27e7f)
[ 285.331209] NFS reply lookup: 0
[ 285.331218] NFS: nfs_update_inode(0:30/128 fh_crc=0x8bcac245 ct=1
info=0x27e7f)
[ 285.331231] NFS: nfs_lookup_revalidate_done(media/dvr_sdcard0) is valid
[ 285.331246] NFS: nfs_weak_revalidate: inode 128 is valid
[ 285.331301] NFS: permission(0:30/2525216000), mask=0x1, res=0
[ 285.331333] NFS call lookup media
[ 285.332307] NFS: nfs_update_inode(0:30/2525216000 fh_crc=0x69ed2ad0 ct=2
info=0x27e7f)
[ 285.332319] NFS reply lookup: 0
[ 285.332327] NFS: nfs_update_inode(0:30/42757 fh_crc=0x9466d356 ct=1
info=0x27e7f)
[ 285.332337] NFS: nfs_lookup_revalidate_done(/media) is valid
[ 285.332348] NFS: permission(0:30/42757), mask=0x1, res=0
[ 285.332361] NFS call lookup dvr_sdcard0
[ 285.333321] NFS: nfs_update_inode(0:30/42757 fh_crc=0x9466d356 ct=1
info=0x27e7f)
[ 285.333331] NFS reply lookup: 0
[ 285.333341] NFS: nfs_update_inode(0:30/128 fh_crc=0x8bcac245 ct=1
info=0x27e7f)
[ 285.333353] NFS: nfs_lookup_revalidate_done(media/dvr_sdcard0) is valid
[ 285.333365] NFS: nfs_weak_revalidate: inode 128 is valid
[ 285.333379] NFS call fsstat
[ 285.336596] NFS reply fsstat: 0
==============================
Android9.0
saxxx:/data/vendor/nfs/mount # ls -al
total 52
drwxrwxrwx 11 root root 4096 2020-01-01 00:00 .
drwxrwxrwx 4 root root 4096 1970-01-01 08:00 ..
drwxrwxrwx 2 root root 4096 2020-01-01 00:00 CHWM_V3
drwxrwxrwx 2 root root 4096 2020-01-01 00:11 DVR
drwxrwxrwx 2 root root 4096 2020-01-01 00:00 MINI
drwxrwxrwx 2 root root 4096 2020-01-01 00:00 bootanimation
drwxrwxrwx 2 root root 4096 2020-01-01 00:00 common
drwxrwxrwx 2 root root 4096 2020-01-01 00:00 coredump
drwxrwxrwx 3 root root 4096 2020-01-01 00:00 fota
drwxrwxrwx 3 root root 4096 2020-01-01 00:00 qlog
drwxrwxrwx 2 root root 4096 2020-01-01 00:00 themes
2、insert TF card to QNX USB Port
saxxx:/data/vendor/nfs/mount # ls -al DVR/
total 36
drwxrwxrwx 2 root root 4096 2020-01-01 00:01 .
drwxrwxrwx 11 root root 4096 2020-01-01 00:00 ..
-rw-r--r-- 1 root root 24576 2020-01-01 00:01 .recordfile_front.db
dr-xr-xr-x 2 root root 0 2020-01-01 00:01 media
3、
saxxx:/data/vendor/nfs/mount # ls -al DVR/media/dvr_sdcard0/
total 2508
drwxrwxrwx 3 root root 4096 2020-01-01 00:01 .
dr-xr-xr-x 2 root root 0 2020-01-01 00:02 ..
drwxrwxrwx 6 root root 4096 2020-01-01 00:01 ExternalDVR
-rw-rw-rw- 1 root root 2560000 2020-01-01 00:01 check.dat
-rw-rw-rw- 1 root root 0 2020-01-01 00:07 nfs_ready.flag.file
QNX:
# mount
/dev/umass0x20 on /usr/nfs_share/DVR/media/dvr_sdcard0 type dos (fat32)
# cat /etc/exports
/usr/nfs_share/DVR/ -root=0 193.18.1.201
-Env/Platform
QNX:
SDP 7.0, QNX NFS Server V3
nfs root -> /usr/nfs_share/DVR, mount TF card(usb) to
/usr/nfs_share/DVR/media/dvr_sdcard0, Android can access dvr_sdcard from nfs
root.
Android:
9.0, Nfs client V3, Kernel 4.14.156
Best Regards
Hong Jiu Jin
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