diff options
Diffstat (limited to 'ANDROID_3.4.5/include/linux/lockd/lockd.h')
| -rw-r--r-- | ANDROID_3.4.5/include/linux/lockd/lockd.h | 365 |
1 files changed, 0 insertions, 365 deletions
diff --git a/ANDROID_3.4.5/include/linux/lockd/lockd.h b/ANDROID_3.4.5/include/linux/lockd/lockd.h deleted file mode 100644 index f04ce6ac..00000000 --- a/ANDROID_3.4.5/include/linux/lockd/lockd.h +++ /dev/null @@ -1,365 +0,0 @@ -/* - * linux/include/linux/lockd/lockd.h - * - * General-purpose lockd include file. - * - * Copyright (C) 1996 Olaf Kirch <okir@monad.swb.de> - */ - -#ifndef LINUX_LOCKD_LOCKD_H -#define LINUX_LOCKD_LOCKD_H - -#ifdef __KERNEL__ - -#include <linux/in.h> -#include <linux/in6.h> -#include <net/ipv6.h> -#include <linux/fs.h> -#include <linux/kref.h> -#include <linux/utsname.h> -#include <linux/nfsd/nfsfh.h> -#include <linux/lockd/bind.h> -#include <linux/lockd/xdr.h> -#ifdef CONFIG_LOCKD_V4 -#include <linux/lockd/xdr4.h> -#endif -#include <linux/lockd/debug.h> - -/* - * Version string - */ -#define LOCKD_VERSION "0.5" - -/* - * Default timeout for RPC calls (seconds) - */ -#define LOCKD_DFLT_TIMEO 10 - -/* - * Lockd host handle (used both by the client and server personality). - */ -struct nlm_host { - struct hlist_node h_hash; /* doubly linked list */ - struct sockaddr_storage h_addr; /* peer address */ - size_t h_addrlen; - struct sockaddr_storage h_srcaddr; /* our address (optional) */ - size_t h_srcaddrlen; - struct rpc_clnt *h_rpcclnt; /* RPC client to talk to peer */ - char *h_name; /* remote hostname */ - u32 h_version; /* interface version */ - unsigned short h_proto; /* transport proto */ - unsigned short h_reclaiming : 1, - h_server : 1, /* server side, not client side */ - h_noresvport : 1, - h_inuse : 1; - wait_queue_head_t h_gracewait; /* wait while reclaiming */ - struct rw_semaphore h_rwsem; /* Reboot recovery lock */ - u32 h_state; /* pseudo-state counter */ - u32 h_nsmstate; /* true remote NSM state */ - u32 h_pidcount; /* Pseudopids */ - atomic_t h_count; /* reference count */ - struct mutex h_mutex; /* mutex for pmap binding */ - unsigned long h_nextrebind; /* next portmap call */ - unsigned long h_expires; /* eligible for GC */ - struct list_head h_lockowners; /* Lockowners for the client */ - spinlock_t h_lock; - struct list_head h_granted; /* Locks in GRANTED state */ - struct list_head h_reclaim; /* Locks in RECLAIM state */ - struct nsm_handle *h_nsmhandle; /* NSM status handle */ - char *h_addrbuf; /* address eyecatcher */ - struct net *net; /* host net */ -}; - -/* - * The largest string sm_addrbuf should hold is a full-size IPv6 address - * (no "::" anywhere) with a scope ID. The buffer size is computed to - * hold eight groups of colon-separated four-hex-digit numbers, a - * percent sign, a scope id (at most 32 bits, in decimal), and NUL. - */ -#define NSM_ADDRBUF ((8 * 4 + 7) + (1 + 10) + 1) - -struct nsm_handle { - struct list_head sm_link; - atomic_t sm_count; - char *sm_mon_name; - char *sm_name; - struct sockaddr_storage sm_addr; - size_t sm_addrlen; - unsigned int sm_monitored : 1, - sm_sticky : 1; /* don't unmonitor */ - struct nsm_private sm_priv; - char sm_addrbuf[NSM_ADDRBUF]; -}; - -/* - * Rigorous type checking on sockaddr type conversions - */ -static inline struct sockaddr_in *nlm_addr_in(const struct nlm_host *host) -{ - return (struct sockaddr_in *)&host->h_addr; -} - -static inline struct sockaddr *nlm_addr(const struct nlm_host *host) -{ - return (struct sockaddr *)&host->h_addr; -} - -static inline struct sockaddr_in *nlm_srcaddr_in(const struct nlm_host *host) -{ - return (struct sockaddr_in *)&host->h_srcaddr; -} - -static inline struct sockaddr *nlm_srcaddr(const struct nlm_host *host) -{ - return (struct sockaddr *)&host->h_srcaddr; -} - -/* - * Map an fl_owner_t into a unique 32-bit "pid" - */ -struct nlm_lockowner { - struct list_head list; - atomic_t count; - - struct nlm_host *host; - fl_owner_t owner; - uint32_t pid; -}; - -struct nlm_wait; - -/* - * Memory chunk for NLM client RPC request. - */ -#define NLMCLNT_OHSIZE ((__NEW_UTS_LEN) + 10u) -struct nlm_rqst { - atomic_t a_count; - unsigned int a_flags; /* initial RPC task flags */ - struct nlm_host * a_host; /* host handle */ - struct nlm_args a_args; /* arguments */ - struct nlm_res a_res; /* result */ - struct nlm_block * a_block; - unsigned int a_retries; /* Retry count */ - u8 a_owner[NLMCLNT_OHSIZE]; -}; - -/* - * This struct describes a file held open by lockd on behalf of - * an NFS client. - */ -struct nlm_file { - struct hlist_node f_list; /* linked list */ - struct nfs_fh f_handle; /* NFS file handle */ - struct file * f_file; /* VFS file pointer */ - struct nlm_share * f_shares; /* DOS shares */ - struct list_head f_blocks; /* blocked locks */ - unsigned int f_locks; /* guesstimate # of locks */ - unsigned int f_count; /* reference count */ - struct mutex f_mutex; /* avoid concurrent access */ -}; - -/* - * This is a server block (i.e. a lock requested by some client which - * couldn't be granted because of a conflicting lock). - */ -#define NLM_NEVER (~(unsigned long) 0) -/* timeout on non-blocking call: */ -#define NLM_TIMEOUT (7 * HZ) - -struct nlm_block { - struct kref b_count; /* Reference count */ - struct list_head b_list; /* linked list of all blocks */ - struct list_head b_flist; /* linked list (per file) */ - struct nlm_rqst * b_call; /* RPC args & callback info */ - struct svc_serv * b_daemon; /* NLM service */ - struct nlm_host * b_host; /* host handle for RPC clnt */ - unsigned long b_when; /* next re-xmit */ - unsigned int b_id; /* block id */ - unsigned char b_granted; /* VFS granted lock */ - struct nlm_file * b_file; /* file in question */ - struct cache_req * b_cache_req; /* deferred request handling */ - struct file_lock * b_fl; /* set for GETLK */ - struct cache_deferred_req * b_deferred_req; - unsigned int b_flags; /* block flags */ -#define B_QUEUED 1 /* lock queued */ -#define B_GOT_CALLBACK 2 /* got lock or conflicting lock */ -#define B_TIMED_OUT 4 /* filesystem too slow to respond */ -}; - -/* - * Global variables - */ -extern const struct rpc_program nlm_program; -extern struct svc_procedure nlmsvc_procedures[]; -#ifdef CONFIG_LOCKD_V4 -extern struct svc_procedure nlmsvc_procedures4[]; -#endif -extern int nlmsvc_grace_period; -extern unsigned long nlmsvc_timeout; -extern bool nsm_use_hostnames; -extern u32 nsm_local_state; - -/* - * Lockd client functions - */ -struct nlm_rqst * nlm_alloc_call(struct nlm_host *host); -int nlm_async_call(struct nlm_rqst *, u32, const struct rpc_call_ops *); -int nlm_async_reply(struct nlm_rqst *, u32, const struct rpc_call_ops *); -void nlmclnt_release_call(struct nlm_rqst *); -struct nlm_wait * nlmclnt_prepare_block(struct nlm_host *host, struct file_lock *fl); -void nlmclnt_finish_block(struct nlm_wait *block); -int nlmclnt_block(struct nlm_wait *block, struct nlm_rqst *req, long timeout); -__be32 nlmclnt_grant(const struct sockaddr *addr, - const struct nlm_lock *lock); -void nlmclnt_recovery(struct nlm_host *); -int nlmclnt_reclaim(struct nlm_host *, struct file_lock *); -void nlmclnt_next_cookie(struct nlm_cookie *); - -/* - * Host cache - */ -struct nlm_host *nlmclnt_lookup_host(const struct sockaddr *sap, - const size_t salen, - const unsigned short protocol, - const u32 version, - const char *hostname, - int noresvport, - struct net *net); -void nlmclnt_release_host(struct nlm_host *); -struct nlm_host *nlmsvc_lookup_host(const struct svc_rqst *rqstp, - const char *hostname, - const size_t hostname_len); -void nlmsvc_release_host(struct nlm_host *); -struct rpc_clnt * nlm_bind_host(struct nlm_host *); -void nlm_rebind_host(struct nlm_host *); -struct nlm_host * nlm_get_host(struct nlm_host *); -void nlm_shutdown_hosts(void); -void nlm_shutdown_hosts_net(struct net *net); -void nlm_host_rebooted(const struct nlm_reboot *); - -/* - * Host monitoring - */ -int nsm_monitor(const struct nlm_host *host); -void nsm_unmonitor(const struct nlm_host *host); - -struct nsm_handle *nsm_get_handle(const struct sockaddr *sap, - const size_t salen, - const char *hostname, - const size_t hostname_len); -struct nsm_handle *nsm_reboot_lookup(const struct nlm_reboot *info); -void nsm_release(struct nsm_handle *nsm); - -/* - * This is used in garbage collection and resource reclaim - * A return value != 0 means destroy the lock/block/share - */ -typedef int (*nlm_host_match_fn_t)(void *cur, struct nlm_host *ref); - -/* - * Server-side lock handling - */ -__be32 nlmsvc_lock(struct svc_rqst *, struct nlm_file *, - struct nlm_host *, struct nlm_lock *, int, - struct nlm_cookie *, int); -__be32 nlmsvc_unlock(struct nlm_file *, struct nlm_lock *); -__be32 nlmsvc_testlock(struct svc_rqst *, struct nlm_file *, - struct nlm_host *, struct nlm_lock *, - struct nlm_lock *, struct nlm_cookie *); -__be32 nlmsvc_cancel_blocked(struct nlm_file *, struct nlm_lock *); -unsigned long nlmsvc_retry_blocked(void); -void nlmsvc_traverse_blocks(struct nlm_host *, struct nlm_file *, - nlm_host_match_fn_t match); -void nlmsvc_grant_reply(struct nlm_cookie *, __be32); -void nlmsvc_release_call(struct nlm_rqst *); - -/* - * File handling for the server personality - */ -__be32 nlm_lookup_file(struct svc_rqst *, struct nlm_file **, - struct nfs_fh *); -void nlm_release_file(struct nlm_file *); -void nlmsvc_mark_resources(void); -void nlmsvc_free_host_resources(struct nlm_host *); -void nlmsvc_invalidate_all(void); - -/* - * Cluster failover support - */ -int nlmsvc_unlock_all_by_sb(struct super_block *sb); -int nlmsvc_unlock_all_by_ip(struct sockaddr *server_addr); - -static inline struct inode *nlmsvc_file_inode(struct nlm_file *file) -{ - return file->f_file->f_path.dentry->d_inode; -} - -static inline int __nlm_privileged_request4(const struct sockaddr *sap) -{ - const struct sockaddr_in *sin = (struct sockaddr_in *)sap; - - if (ntohs(sin->sin_port) > 1023) - return 0; - - return ipv4_is_loopback(sin->sin_addr.s_addr); -} - -#if IS_ENABLED(CONFIG_IPV6) -static inline int __nlm_privileged_request6(const struct sockaddr *sap) -{ - const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap; - - if (ntohs(sin6->sin6_port) > 1023) - return 0; - - if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_MAPPED) - return ipv4_is_loopback(sin6->sin6_addr.s6_addr32[3]); - - return ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LOOPBACK; -} -#else /* IS_ENABLED(CONFIG_IPV6) */ -static inline int __nlm_privileged_request6(const struct sockaddr *sap) -{ - return 0; -} -#endif /* IS_ENABLED(CONFIG_IPV6) */ - -/* - * Ensure incoming requests are from local privileged callers. - * - * Return TRUE if sender is local and is connecting via a privileged port; - * otherwise return FALSE. - */ -static inline int nlm_privileged_requester(const struct svc_rqst *rqstp) -{ - const struct sockaddr *sap = svc_addr(rqstp); - - switch (sap->sa_family) { - case AF_INET: - return __nlm_privileged_request4(sap); - case AF_INET6: - return __nlm_privileged_request6(sap); - default: - return 0; - } -} - -/* - * Compare two NLM locks. - * When the second lock is of type F_UNLCK, this acts like a wildcard. - */ -static inline int nlm_compare_locks(const struct file_lock *fl1, - const struct file_lock *fl2) -{ - return fl1->fl_pid == fl2->fl_pid - && fl1->fl_owner == fl2->fl_owner - && fl1->fl_start == fl2->fl_start - && fl1->fl_end == fl2->fl_end - &&(fl1->fl_type == fl2->fl_type || fl2->fl_type == F_UNLCK); -} - -extern const struct lock_manager_operations nlmsvc_lock_operations; - -#endif /* __KERNEL__ */ - -#endif /* LINUX_LOCKD_LOCKD_H */ |