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hugetlbfs: Implement show_options

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Implement the show_options superblock op for hugetlbfs as part of a bid to
get rid of s_options and generic_show_options() to make it easier to
implement a context-based mount where the mount options can be passed
individually over a file descriptor.

Note that the uid and gid should possibly be displayed relative to the
viewer's user namespace.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Nadia Yvette Chambers <nyc@holomorphy.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
David Howells 2017-07-05 16:24:18 +01:00 • committed by Al Viro
parent c3d98ea082
commit 4a25220d4e
2 changed files with 59 additions and 14 deletions
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3
include/linux/hugetlb.h
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@ -262,6 +262,9 @@ struct hugetlbfs_sb_info {
spinlock_t stat_lock;
struct hstate *hstate;
struct hugepage_subpool *spool;
kuid_t uid;
kgid_t gid;
umode_t mode;
};
static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)