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xenfs: Use proc_create_mount_point() to create /proc/xen

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Mounting proc in user namespace containers fails if the xenbus
filesystem is mounted on /proc/xen because this directory fails
the "permanently empty" test. proc_create_mount_point() exists
specifically to create such mountpoints in proc but is currently
proc-internal. Export this interface to modules, then use it in
xenbus when creating /proc/xen.

Signed-off-by: Seth Forshee <[email protected]>
Signed-off-by: David Vrabel <[email protected]>
Signed-off-by: Juergen Gross <[email protected]>
This commit is contained in:
Seth Forshee 2016-11-14 11:12:56 +00:00 • committed by Juergen Gross
commit f97df70b1c
4 changed files with 4 additions and 2 deletions
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1
fs/proc/generic.c
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@ -479,6 +479,7 @@ struct proc_dir_entry *proc_create_mount_point(const char *name)
}
return ent;
}
EXPORT_SYMBOL(proc_create_mount_point);
struct proc_dir_entry *proc_create_data(const char *name, umode_t mode,
struct proc_dir_entry *parent,

1
fs/proc/internal.h
View file

@ -195,7 +195,6 @@ static inline bool is_empty_pde(const struct proc_dir_entry *pde)
{
return S_ISDIR(pde->mode) && !pde->proc_iops;
}
struct proc_dir_entry *proc_create_mount_point(const char *name);
/*
* inode.c