2014-11-01 05:56:04 +03:00
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#ifndef _LINUX_NS_COMMON_H
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#define _LINUX_NS_COMMON_H
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2014-11-01 09:32:53 +03:00
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struct proc_ns_operations;
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2014-11-01 05:56:04 +03:00
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struct ns_common {
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take the targets of /proc/*/ns/* symlinks to separate fs
New pseudo-filesystem: nsfs. Targets of /proc/*/ns/* live there now.
It's not mountable (not even registered, so it's not in /proc/filesystems,
etc.). Files on it *are* bindable - we explicitly permit that in do_loopback().
This stuff lives in fs/nsfs.c now; proc_ns_fget() moved there as well.
get_proc_ns() is a macro now (it's simply returning ->i_private; would
have been an inline, if not for header ordering headache).
proc_ns_inode() is an ex-parrot. The interface used in procfs is
ns_get_path(path, task, ops) and ns_get_name(buf, size, task, ops).
Dentries and inodes are never hashed; a non-counting reference to dentry
is stashed in ns_common (removed by ->d_prune()) and reused by ns_get_path()
if present. See ns_get_path()/ns_prune_dentry/nsfs_evict() for details
of that mechanism.
As the result, proc_ns_follow_link() has stopped poking in nd->path.mnt;
it does nd_jump_link() on a consistent <vfsmount,dentry> pair it gets
from ns_get_path().
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-11-01 17:57:28 +03:00
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atomic_long_t stashed;
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2014-11-01 09:32:53 +03:00
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const struct proc_ns_operations *ops;
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2014-11-01 05:56:04 +03:00
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unsigned int inum;
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};
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#endif
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