Hello,I have an interesting situation one of our lustre file systems where I cannot rename files or directories across a specific directory boundary but I can create hard links across the same boundary. The relevant section of strace for 'mv' follows:
=====
geteuid() = 0
ioctl(0, TCGETS, {B38400 opost isig icanon echo ...}) = 0
stat("..", {st_mode=S_IFDIR|0755, st_size=11776, ...}) = 0
lstat("test.txt", {st_mode=S_IFREG|0644, st_size=765876794, ...}) = 0
lstat("../test.txt", 0x7fff36c3ff30) = -1 ENOENT (No such file or
directory)
renameat2(AT_FDCWD, "test.txt", AT_FDCWD, "../test.txt", 0) = -1 EXDEV
(Invalid cross-device link)
=====The systems I've tested this on are in our nosquash_nids list as they were used for cluster array jobs to copy data between a retiring file system and a new one. The clients are either 2.10 or 2.12. The file system is run by 2.12.2 on zfs.
nodemap is not active. Best, Jesse Stroik
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