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akw27@arcadians.cl.cam.ac.uk
3e2b1c87ba
Mostly this makes the tap code work again with all of the changes that have happened to the block drivers recently. We now use a shared page per VBD (to the driver), and handle control information through the store. The taplib interfaces have changed to be based around per-vbd data structures that you can attach arbitrary handlers for. There is also initial code for a user-level blockback driver, which aims to get around the use of loopbacks for file-based vbds. Still plenty of work to do here -- this is a working incremental checkin and I'm away from this for the next four weeks. Signed-off-by: Andrew Warfield <andrew.warfield@cl.cam.ac.uk>
56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
/*
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* list.h
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*
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* This is a subset of linux's list.h intended to be used in user-space.
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*
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*/
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#ifndef __LIST_H__
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#define __LIST_H__
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#define LIST_POISON1 ((void *) 0x00100100)
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#define LIST_POISON2 ((void *) 0x00200200)
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struct list_head {
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struct list_head *next, *prev;
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};
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#define LIST_HEAD_INIT(name) { &(name), &(name) }
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#define LIST_HEAD(name) \
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struct list_head name = LIST_HEAD_INIT(name)
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static inline void __list_add(struct list_head *new,
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struct list_head *prev,
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struct list_head *next)
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{
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next->prev = new;
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new->next = next;
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new->prev = prev;
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prev->next = new;
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}
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static inline void list_add(struct list_head *new, struct list_head *head)
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{
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__list_add(new, head, head->next);
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}
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static inline void __list_del(struct list_head * prev, struct list_head * next)
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{
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next->prev = prev;
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prev->next = next;
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}
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static inline void list_del(struct list_head *entry)
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{
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__list_del(entry->prev, entry->next);
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entry->next = LIST_POISON1;
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entry->prev = LIST_POISON2;
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}
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#define list_entry(ptr, type, member) \
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((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member)))
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#define list_for_each_entry(pos, head, member) \
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for (pos = list_entry((head)->next, typeof(*pos), member); \
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&pos->member != (head); \
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pos = list_entry(pos->member.next, typeof(*pos), member))
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#endif /* __LIST_H__ */
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