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hw/9pfs: Add fs driver specific details to fscontext

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Add a new context flag PATHNAME_FSCONTEXT and indicate whether
the fs driver track fid using path names. Also add a private
pointer that help us to track fs driver specific values in there

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
This commit is contained in:
Aneesh Kumar K.V 2011-08-02 11:35:54 +05:30
parent 0174fe73e6
commit 532decb715
9 changed files with 105 additions and 52 deletions
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21
hw/9pfs/virtio-9p.h
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@ -388,6 +388,27 @@ static inline size_t do_pdu_unpack(void *dst, struct iovec *sg, int sg_count,
return pdu_packunpack(dst, sg, sg_count, offset, size, 0);
}
static inline void v9fs_path_write_lock(V9fsState *s)
{
if (s->ctx.flags & PATHNAME_FSCONTEXT) {
qemu_co_rwlock_wrlock(&s->rename_lock);
}
}
static inline void v9fs_path_read_lock(V9fsState *s)
{
if (s->ctx.flags & PATHNAME_FSCONTEXT) {
qemu_co_rwlock_rdlock(&s->rename_lock);
}
}
static inline void v9fs_path_unlock(V9fsState *s)
{
if (s->ctx.flags & PATHNAME_FSCONTEXT) {
qemu_co_rwlock_unlock(&s->rename_lock);
}
}
extern void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq);
extern void virtio_9p_set_fd_limit(void);
extern void v9fs_reclaim_fd(V9fsState *s);