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Revision fb642b92c267beeefd352af9bc461eac93a7552c authored by NeilBrown on 21 May 2015, 02:00:47 UTC, committed by NeilBrown on 28 May 2015, 01:36:25 UTC 
md/raid5: duplicate some more handle_stripe_clean_event code in break_stripe_batch_list
 
break_stripe_batch list didn't clear head_sh->batch_head.
This was probably a bug.

Also clear all R5_Overlap flags and if any were cleared, wake up
'wait_for_overlap'.
This isn't always necessary but the worst effect is a little
extra checking for code that is waiting on wait_for_overlap.

Also, don't use wake_up_nr() because that does the wrong thing
if 'nr' is zero, and it number of flags cleared doesn't
strongly correlate with the number of threads to wake.

Signed-off-by: NeilBrown <neilb@suse.de>
1 parent 4e3d62f
Raw File
internal.h 
#ifndef MPLS_INTERNAL_H
#define MPLS_INTERNAL_H

#define LABEL_IPV4_EXPLICIT_NULL	0 /* RFC3032 */
#define LABEL_ROUTER_ALERT_LABEL	1 /* RFC3032 */
#define LABEL_IPV6_EXPLICIT_NULL	2 /* RFC3032 */
#define LABEL_IMPLICIT_NULL		3 /* RFC3032 */
#define LABEL_ENTROPY_INDICATOR		7 /* RFC6790 */
#define LABEL_GAL			13 /* RFC5586 */
#define LABEL_OAM_ALERT			14 /* RFC3429 */
#define LABEL_EXTENSION			15 /* RFC7274 */


struct mpls_shim_hdr {
	__be32 label_stack_entry;
};

struct mpls_entry_decoded {
	u32 label;
	u8 ttl;
	u8 tc;
	u8 bos;
};

struct mpls_dev {
	int			input_enabled;

	struct ctl_table_header *sysctl;
};

struct sk_buff;

static inline struct mpls_shim_hdr *mpls_hdr(const struct sk_buff *skb)
{
	return (struct mpls_shim_hdr *)skb_network_header(skb);
}

static inline struct mpls_shim_hdr mpls_entry_encode(u32 label, unsigned ttl, unsigned tc, bool bos)
{
	struct mpls_shim_hdr result;
	result.label_stack_entry =
		cpu_to_be32((label << MPLS_LS_LABEL_SHIFT) |
			    (tc << MPLS_LS_TC_SHIFT) |
			    (bos ? (1 << MPLS_LS_S_SHIFT) : 0) |
			    (ttl << MPLS_LS_TTL_SHIFT));
	return result;
}

static inline struct mpls_entry_decoded mpls_entry_decode(struct mpls_shim_hdr *hdr)
{
	struct mpls_entry_decoded result;
	unsigned entry = be32_to_cpu(hdr->label_stack_entry);

	result.label = (entry & MPLS_LS_LABEL_MASK) >> MPLS_LS_LABEL_SHIFT;
	result.ttl = (entry & MPLS_LS_TTL_MASK) >> MPLS_LS_TTL_SHIFT;
	result.tc =  (entry & MPLS_LS_TC_MASK) >> MPLS_LS_TC_SHIFT;
	result.bos = (entry & MPLS_LS_S_MASK) >> MPLS_LS_S_SHIFT;

	return result;
}

int nla_put_labels(struct sk_buff *skb, int attrtype,  u8 labels, const u32 label[]);
int nla_get_labels(const struct nlattr *nla, u32 max_labels, u32 *labels, u32 label[]);

#endif /* MPLS_INTERNAL_H */
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