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a2770d86b3
This reverts commit e9496ff46a. Quoth Al:
"it's dependent on a lot of other stuff not currently in mainline
and badly broken with current fs/namespace.c. Sorry, badly
out-of-order cherry-pick from old queue.
PS: there's a large pending series reworking the refcounting and
lifetime rules for vfsmounts that will, among other things, allow to
rip a subtree away _without_ dissolving connections in it, to be
garbage-collected when all active references are gone. It's
considerably saner wrt "is the subtree busy" logics, but it's nowhere
near being ready for merge at the moment; this changeset is one of the
things becoming possible with that sucker, but it certainly shouldn't
have been picked during this cycle. My apologies..."
Noticed-by: Eric Paris <eparis@redhat.com>
Requested-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
41 lines
890 B
C
41 lines
890 B
C
#ifndef _NAMESPACE_H_
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#define _NAMESPACE_H_
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#ifdef __KERNEL__
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#include <linux/path.h>
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#include <linux/seq_file.h>
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#include <linux/wait.h>
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struct mnt_namespace {
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atomic_t count;
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struct vfsmount * root;
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struct list_head list;
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wait_queue_head_t poll;
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int event;
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};
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struct proc_mounts {
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struct seq_file m; /* must be the first element */
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struct mnt_namespace *ns;
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struct path root;
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int event;
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};
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struct fs_struct;
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extern struct mnt_namespace *create_mnt_ns(struct vfsmount *mnt);
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extern struct mnt_namespace *copy_mnt_ns(unsigned long, struct mnt_namespace *,
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struct fs_struct *);
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extern void put_mnt_ns(struct mnt_namespace *ns);
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static inline void get_mnt_ns(struct mnt_namespace *ns)
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{
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atomic_inc(&ns->count);
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}
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extern const struct seq_operations mounts_op;
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extern const struct seq_operations mountinfo_op;
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extern const struct seq_operations mountstats_op;
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#endif
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#endif
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