diff options
| author | Nikolay Borisov <[email protected]> | 2016-05-30 20:37:36 +0300 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2016-07-25 13:21:49 -0700 |
| commit | 82a1b2d6289f9ceae0bee6f1e71d3bc29a8c5d16 (patch) | |
| tree | 57c01daa4c2eb3ab7fca9faefee6b071f7b4a2e0 /config/kernel-kuid-helpers.m4 | |
| parent | 77943bc1dc39315feb335b0882dd6c91041538a3 (diff) | |
Check whether the kernel supports i_uid/gid_read/write helpers
Since the concept of a kuid and the need to translate from it to
ordinary integer type was added in kernel version 3.5 implement necessary
plumbing to be able to detect this condition during compile time. If
the kernel doesn't support the kuid then just fall back to directly
accessing the respective struct inode's members
Signed-off-by: Nikolay Borisov <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Issue #4685
Issue #227
Diffstat (limited to 'config/kernel-kuid-helpers.m4')
| -rw-r--r-- | config/kernel-kuid-helpers.m4 | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/config/kernel-kuid-helpers.m4 b/config/kernel-kuid-helpers.m4 new file mode 100644 index 000000000..60713b9d3 --- /dev/null +++ b/config/kernel-kuid-helpers.m4 @@ -0,0 +1,22 @@ +dnl # +dnl # 3.5 API change, +dnl # Since usernamespaces were introduced in kernel version 3.5, it +dnl # became necessary to go through one more level of indirection +dnl # when dealing with uid/gid - namely the kuid type. +dnl # +dnl # +AC_DEFUN([ZFS_AC_KERNEL_KUID_HELPERS], [ + AC_MSG_CHECKING([whether i_(uid|gid)_(read|write) exist]) + ZFS_LINUX_TRY_COMPILE([ + #include <linux/fs.h> + ],[ + struct inode *ip = NULL; + (void) i_uid_read(ip); + ],[ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_KUID_HELPERS, 1, + [i_(uid|gid)_(read|write) exist]) + ],[ + AC_MSG_RESULT(no) + ]) +]) |