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Linux 4.8 compat: new s_user_ns member of struct super_block

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Kernel 4.8 paved the way to enabling mounting a file system inside a
non-init user namespace. To facilitate this a s_user_ns member was
added holding the userns in which the filesystem's instance was
mounted. This enables doing the uid/gid translation relative to
this particular username space and not the default init_user_ns.

Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #4928
This commit is contained in:
Nikolay Borisov
2016-08-03 20:19:04 +03:00
committed by Brian Behlendorf
parent cf2731e65b
commit 938cfeb0f2
3 changed files with 39 additions and 0 deletions
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config/kernel.m4
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@@ -8,6 +8,7 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
ZFS_AC_KERNEL_CONFIG
ZFS_AC_KERNEL_DECLARE_EVENT_CLASS
ZFS_AC_KERNEL_CURRENT_BIO_TAIL
ZFS_AC_KERNEL_SUPER_USER_NS
ZFS_AC_KERNEL_SUBMIT_BIO
ZFS_AC_KERNEL_BDEV_BLOCK_DEVICE_OPERATIONS
ZFS_AC_KERNEL_BLOCK_DEVICE_OPERATIONS_RELEASE_VOID