Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * per net namespace data structures for nfsd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2012, Jeff Layton <jlayton@redhat.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #ifndef __NFSD_NETNS_H__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #define __NFSD_NETNS_H__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <net/net_namespace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <net/netns/generic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) /* Hash tables for nfs4_clientid state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #define CLIENT_HASH_BITS                 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #define CLIENT_HASH_SIZE                (1 << CLIENT_HASH_BITS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #define CLIENT_HASH_MASK                (CLIENT_HASH_SIZE - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #define SESSION_HASH_SIZE	512
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) struct cld_net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) struct nfsd4_client_tracking_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  * Represents a nfsd "container". With respect to nfsv4 state tracking, the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  * fields of interest are the *_id_hashtbls and the *_name_tree. These track
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  * the nfs4_client objects by either short or long form clientid.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  * Each nfsd_net runs a nfs4_laundromat workqueue job when necessary to clean
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  * up expired clients and delegations within the container.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) struct nfsd_net {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	struct cld_net *cld_net;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	struct cache_detail *svc_expkey_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	struct cache_detail *svc_export_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	struct cache_detail *idtoname_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	struct cache_detail *nametoid_cache;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	struct lock_manager nfsd4_manager;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	bool grace_ended;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	time64_t boot_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	/* internal mount of the "nfsd" pseudofilesystem: */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	struct vfsmount *nfsd_mnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	struct dentry *nfsd_client_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	 * used in reboot/reset lease grace period processing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	 * conf_id_hashtbl[], and conf_name_tree hold confirmed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	 * setclientid_confirmed info.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	 * unconf_str_hastbl[] and unconf_name_tree hold unconfirmed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	 * setclientid info.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	struct list_head *reclaim_str_hashtbl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	int reclaim_str_hashtbl_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	struct list_head *conf_id_hashtbl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	struct rb_root conf_name_tree;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	struct list_head *unconf_id_hashtbl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	struct rb_root unconf_name_tree;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	struct list_head *sessionid_hashtbl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	 * client_lru holds client queue ordered by nfs4_client.cl_time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	 * for lease renewal.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	 * for last close replay.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	 * All of the above fields are protected by the client_mutex.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	struct list_head client_lru;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	struct list_head close_lru;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	struct list_head del_recall_lru;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	/* protected by blocked_locks_lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	struct list_head blocked_locks_lru;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	struct delayed_work laundromat_work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	/* client_lock protects the client lru list and session hash table */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	spinlock_t client_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	/* protects blocked_locks_lru */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	spinlock_t blocked_locks_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	struct file *rec_file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	bool in_grace;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	const struct nfsd4_client_tracking_ops *client_tracking_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	time64_t nfsd4_lease;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	time64_t nfsd4_grace;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	bool somebody_reclaimed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	bool track_reclaim_completes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	atomic_t nr_reclaim_complete;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	bool nfsd_net_up;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	bool lockd_up;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	/* Time of server startup */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	struct timespec64 nfssvc_boot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	seqlock_t boot_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	 * Max number of connections this nfsd container will allow. Defaults
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	 * to '0' which is means that it bases this on the number of threads.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	unsigned int max_connections;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	u32 clientid_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	u32 clientid_counter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	u32 clverifier_counter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	struct svc_serv *nfsd_serv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	wait_queue_head_t ntf_wq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	atomic_t ntf_refcnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	 * clientid and stateid data for construction of net unique COPY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	 * stateids.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	u32		s2s_cp_cl_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	struct idr	s2s_cp_stateids;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	spinlock_t	s2s_cp_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	 * Version information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	bool *nfsd_versions;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	bool *nfsd4_minorversions;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	 * Duplicate reply cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	struct nfsd_drc_bucket   *drc_hashtbl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	/* max number of entries allowed in the cache */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	unsigned int             max_drc_entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	/* number of significant bits in the hash value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	unsigned int             maskbits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	unsigned int             drc_hashsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	 * Stats and other tracking of on the duplicate reply cache.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	 * These fields and the "rc" fields in nfsdstats are modified
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	 * with only the per-bucket cache lock, which isn't really safe
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	 * and should be fixed if we want the statistics to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	 * completely accurate.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	/* total number of entries */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	atomic_t                 num_drc_entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	/* cache misses due only to checksum comparison failures */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	unsigned int             payload_misses;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	/* amount of memory (in bytes) currently consumed by the DRC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	unsigned int             drc_mem_usage;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	/* longest hash chain seen */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	unsigned int             longest_chain;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	/* size of cache when we saw the longest hash chain */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	unsigned int             longest_chain_cachesize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	struct shrinker		nfsd_reply_cache_shrinker;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	/* utsname taken from the process that starts the server */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	char			nfsd_name[UNX_MAXNODENAME+1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) /* Simple check to find out if a given net was properly initialized */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) #define nfsd_netns_ready(nn) ((nn)->sessionid_hashtbl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) extern void nfsd_netns_free_versions(struct nfsd_net *nn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) extern unsigned int nfsd_net_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) void nfsd_copy_boot_verifier(__be32 verf[2], struct nfsd_net *nn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) void nfsd_reset_boot_verifier(struct nfsd_net *nn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) #endif /* __NFSD_NETNS_H__ */