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Remove vn_set_fs_pwd()/vn_set_pwd() (no need to be at / during insmod)

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Per suggestion from @behlendorf in #8777, remove vn_set_fs_pwd() and
vn_set_pwd() which are only used in zfs_ioctl.c:_init() while loading
zfs.ko.

The rest of initialization functions being called here after cwd set
to / don't depend on cwd of the process except for spa_config_load().
spa_config_load() uses a relative path ".//etc/zfs/zpool.cache" when
`rootdir` is non-NULL, which is "/etc/zfs/zpool.cache" given cwd is /,
so just unconditionally use the absolute path without "./", so that
`vn_set_pwd("/")` as well as the entire functions can be removed.
This is also what FreeBSD does.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Tomohiro Kusumi <kusumi.tomohiro@osnexus.com>
Closes #8826
This commit is contained in:
Tomohiro Kusumi
2019-05-30 08:18:14 +09:00
committed by Brian Behlendorf
parent 1e724f4f34
commit fe0c9f409a
6 changed files with 1 additions and 93 deletions
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config/kernel.m4
-1
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@@ -12,7 +12,6 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
ZFS_AC_KERNEL_CTL_NAME
ZFS_AC_KERNEL_PDE_DATA
ZFS_AC_KERNEL_2ARGS_VFS_FSYNC
ZFS_AC_KERNEL_FS_STRUCT_SPINLOCK
ZFS_AC_KERNEL_KUIDGID_T
ZFS_AC_KERNEL_FALLOCATE
ZFS_AC_KERNEL_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE