[LU-12244] lfs check subcommand no longer works as non-root user

Related — Mon, 15 Jul 2019 21:55:31 +0000

With the Lustre 2.10 client, non-root users appear to no longer be able to run "lfs check <servers|osts|mds>". Strace of the command shows a "Permission denied" error accessing /sys/kernel/debug/lustre/devices, resulting in the following error at runtime: error: check: mds status failed

Our Operations staff w/o root access needs "lfs check ..." functionality to monitor and fix file system issues, so fixing this issue would helpful for us.

statfs("/sys/kernel/debug/", {f_type=DEBUGFS_MAGIC, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID|ST_RELATIME}) = 0
stat("/sys/fs/lnet/devices", 0x7fffffff8760) = -1 ENOENT (No such file or directory)
stat("/sys/fs/lustre/devices", 0x7fffffff8760) = -1 ENOENT (No such file or directory)
stat("/sys/kernel/debug/lnet/devices", 0x7fffffff8740) = -1 EACCES (Permission denied)
stat("/sys/kernel/debug/lustre/devices", 0x7fffffff8740) = -1 EACCES (Permission denied)
stat("/proc/fs/lnet/devices", 0x7fffffff8760) = -1 ENOENT (No such file or directory)
stat("/proc/fs/lustre/devices", 0x7fffffff8760) = -1 ENOENT (No such file or directory)
stat("/proc/sys/lnet/devices", 0x7fffffff8760) = -1 ENOENT (No such file or directory)
stat("/proc/sys/lustre/devices", 0x7fffffff8760) = -1 ENOENT (No such file or directory)
write(2, "error: check: mds status failed\n", 32error: check: mds status failed
) = 32
exit_group(2)                           = ?
+++ exited with 2 +++

Whamcloud Community JIRA

[LU-12244] lfs check subcommand no longer works as non-root user