f15146380d
Moving the event counter into the dynamically allocated 'struc seq_file' allows poll() support without the need to allocate its own tracking structure. All current users are switched over to use the new counter. Requested-by: Andrew Morton akpm@linux-foundation.org Acked-by: NeilBrown <neilb@suse.de> Tested-by: Lucas De Marchi lucas.demarchi@profusion.mobi Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
41 lines
927 B
C
41 lines
927 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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};
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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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extern int mnt_had_events(struct proc_mounts *);
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#endif
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#endif
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