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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/fs/nfsd/cache.h
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@@ -10,6 +10,7 @@
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 #define NFSCACHE_H
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 #include <linux/sunrpc/svc.h>
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+#include "netns.h"
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 /*
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  * Representation of a reply cache entry.
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@@ -19,18 +20,22 @@
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  * is much larger than a sockaddr_in6.
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  */
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 struct svc_cacherep {
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-	struct list_head	c_lru;
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+	struct {
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+		/* Keep often-read xid, csum in the same cache line: */
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+		__be32			k_xid;
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+		__wsum			k_csum;
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+		u32			k_proc;
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+		u32			k_prot;
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+		u32			k_vers;
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+		unsigned int		k_len;
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+		struct sockaddr_in6	k_addr;
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+	} c_key;
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+	struct rb_node		c_node;
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+	struct list_head	c_lru;
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 	unsigned char		c_state,	/* unused, inprog, done */
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 				c_type,		/* status, buffer */
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 				c_secure : 1;	/* req came from port < 1024 */
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-	struct sockaddr_in6	c_addr;
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-	__be32			c_xid;
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-	u32			c_prot;
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-	u32			c_proc;
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-	u32			c_vers;
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-	unsigned int		c_len;
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-	__wsum			c_csum;
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 	unsigned long		c_timestamp;
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 	union {
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 		struct kvec	u_vec;
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@@ -73,8 +78,10 @@
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 /* Checksum this amount of the request */
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 #define RC_CSUMLEN		(256U)
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-int	nfsd_reply_cache_init(void);
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-void	nfsd_reply_cache_shutdown(void);
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+int	nfsd_drc_slab_create(void);
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+void	nfsd_drc_slab_free(void);
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+int	nfsd_reply_cache_init(struct nfsd_net *);
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+void	nfsd_reply_cache_shutdown(struct nfsd_net *);
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 int	nfsd_cache_lookup(struct svc_rqst *);
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 void	nfsd_cache_update(struct svc_rqst *, int, __be32 *);
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 int	nfsd_reply_cache_stats_open(struct inode *, struct file *);