1ec26815aSDavid Howells /* internal AFS stuff 21da177e4SLinus Torvalds * 308e0e7c8SDavid Howells * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved. 41da177e4SLinus Torvalds * Written by David Howells (dhowells@redhat.com) 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 71da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 81da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 91da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 101da177e4SLinus Torvalds */ 111da177e4SLinus Torvalds 121da177e4SLinus Torvalds #include <linux/compiler.h> 131da177e4SLinus Torvalds #include <linux/kernel.h> 148a79790bSTina Ruchandani #include <linux/ktime.h> 151da177e4SLinus Torvalds #include <linux/fs.h> 161da177e4SLinus Torvalds #include <linux/pagemap.h> 1708e0e7c8SDavid Howells #include <linux/rxrpc.h> 1800d3b7a4SDavid Howells #include <linux/key.h> 19e8edc6e0SAlexey Dobriyan #include <linux/workqueue.h> 2000c541eaSAndrew Morton #include <linux/sched.h> 2180e50be4SChristoph Hellwig #include <linux/fscache.h> 22e1da0222SJens Axboe #include <linux/backing-dev.h> 23ff548773SDavid Howells #include <linux/uuid.h> 24f044c884SDavid Howells #include <net/net_namespace.h> 258324f0bcSDavid Howells #include <net/af_rxrpc.h> 2600c541eaSAndrew Morton 2708e0e7c8SDavid Howells #include "afs.h" 2808e0e7c8SDavid Howells #include "afs_vl.h" 2908e0e7c8SDavid Howells 3008e0e7c8SDavid Howells #define AFS_CELL_MAX_ADDRS 15 3108e0e7c8SDavid Howells 3231143d5dSDavid Howells struct pagevec; 3308e0e7c8SDavid Howells struct afs_call; 3408e0e7c8SDavid Howells 3508e0e7c8SDavid Howells typedef enum { 3608e0e7c8SDavid Howells AFS_VL_NEW, /* new, uninitialised record */ 3708e0e7c8SDavid Howells AFS_VL_CREATING, /* creating record */ 3808e0e7c8SDavid Howells AFS_VL_VALID, /* record is pending */ 3908e0e7c8SDavid Howells AFS_VL_NO_VOLUME, /* no such volume available */ 4008e0e7c8SDavid Howells AFS_VL_UPDATING, /* update in progress */ 4108e0e7c8SDavid Howells AFS_VL_VOLUME_DELETED, /* volume was deleted */ 4208e0e7c8SDavid Howells AFS_VL_UNCERTAIN, /* uncertain state (update failed) */ 4308e0e7c8SDavid Howells } __attribute__((packed)) afs_vlocation_state_t; 441da177e4SLinus Torvalds 4500d3b7a4SDavid Howells struct afs_mount_params { 4600d3b7a4SDavid Howells bool rwpath; /* T if the parent should be considered R/W */ 4700d3b7a4SDavid Howells bool force; /* T to force cell type */ 48bec5eb61Swanglei bool autocell; /* T if set auto mount operation */ 4900d3b7a4SDavid Howells afs_voltype_t type; /* type of volume requested */ 5000d3b7a4SDavid Howells int volnamesz; /* size of volume name */ 5100d3b7a4SDavid Howells const char *volname; /* name of volume to mount */ 52f044c884SDavid Howells struct afs_net *net; /* Network namespace in effect */ 5300d3b7a4SDavid Howells struct afs_cell *cell; /* cell in which to find volume */ 5400d3b7a4SDavid Howells struct afs_volume *volume; /* volume record */ 5500d3b7a4SDavid Howells struct key *key; /* key to use for secure mounting */ 5600d3b7a4SDavid Howells }; 5700d3b7a4SDavid Howells 588e8d7f13SDavid Howells enum afs_call_state { 598e8d7f13SDavid Howells AFS_CALL_REQUESTING, /* request is being sent for outgoing call */ 608e8d7f13SDavid Howells AFS_CALL_AWAIT_REPLY, /* awaiting reply to outgoing call */ 618e8d7f13SDavid Howells AFS_CALL_AWAIT_OP_ID, /* awaiting op ID on incoming call */ 628e8d7f13SDavid Howells AFS_CALL_AWAIT_REQUEST, /* awaiting request data on incoming call */ 638e8d7f13SDavid Howells AFS_CALL_REPLYING, /* replying to incoming call */ 648e8d7f13SDavid Howells AFS_CALL_AWAIT_ACK, /* awaiting final ACK of incoming call */ 658e8d7f13SDavid Howells AFS_CALL_COMPLETE, /* Completed or failed */ 668e8d7f13SDavid Howells }; 67f044c884SDavid Howells 6808e0e7c8SDavid Howells /* 6908e0e7c8SDavid Howells * a record of an in-progress RxRPC call 7008e0e7c8SDavid Howells */ 7108e0e7c8SDavid Howells struct afs_call { 7208e0e7c8SDavid Howells const struct afs_call_type *type; /* type of call */ 7308e0e7c8SDavid Howells wait_queue_head_t waitq; /* processes awaiting completion */ 74341f741fSDavid Howells struct work_struct async_work; /* async I/O processor */ 7508e0e7c8SDavid Howells struct work_struct work; /* actual work processor */ 7608e0e7c8SDavid Howells struct rxrpc_call *rxcall; /* RxRPC call handle */ 7708e0e7c8SDavid Howells struct key *key; /* security for this call */ 78f044c884SDavid Howells struct afs_net *net; /* The network namespace */ 7908e0e7c8SDavid Howells struct afs_server *server; /* server affected by incoming CM call */ 8008e0e7c8SDavid Howells void *request; /* request data (first part) */ 8131143d5dSDavid Howells struct address_space *mapping; /* page set */ 8231143d5dSDavid Howells struct afs_writeback *wb; /* writeback being performed */ 8308e0e7c8SDavid Howells void *buffer; /* reply receive buffer */ 8497e3043aSDavid Howells void *reply[4]; /* Where to put the reply */ 8531143d5dSDavid Howells pgoff_t first; /* first page in mapping to deal with */ 8631143d5dSDavid Howells pgoff_t last; /* last page in mapping to deal with */ 87d001648eSDavid Howells size_t offset; /* offset into received data store */ 88341f741fSDavid Howells atomic_t usage; 898e8d7f13SDavid Howells enum afs_call_state state; 9008e0e7c8SDavid Howells int error; /* error code */ 91d001648eSDavid Howells u32 abort_code; /* Remote abort ID or 0 */ 9208e0e7c8SDavid Howells unsigned request_size; /* size of request data */ 9308e0e7c8SDavid Howells unsigned reply_max; /* maximum size of reply */ 9431143d5dSDavid Howells unsigned first_offset; /* offset into mapping[first] */ 95bcd89270SMarc Dionne union { 9631143d5dSDavid Howells unsigned last_to; /* amount of mapping[last] */ 97bcd89270SMarc Dionne unsigned count2; /* count used in unmarshalling */ 98bcd89270SMarc Dionne }; 9908e0e7c8SDavid Howells unsigned char unmarshall; /* unmarshalling phase */ 10008e0e7c8SDavid Howells bool incoming; /* T if incoming call */ 10131143d5dSDavid Howells bool send_pages; /* T if data from mapping should be sent */ 102d001648eSDavid Howells bool need_attention; /* T if RxRPC poked us */ 10356ff9c83SDavid Howells bool async; /* T if asynchronous */ 104a68f4a27SDavid Howells bool upgrade; /* T to request service upgrade */ 10508e0e7c8SDavid Howells u16 service_id; /* RxRPC service ID to call */ 10650a2c953SDavid Howells u32 operation_ID; /* operation ID for an incoming call */ 10708e0e7c8SDavid Howells u32 count; /* count for use in unmarshalling */ 10808e0e7c8SDavid Howells __be32 tmp; /* place to extract temporary data */ 10931143d5dSDavid Howells afs_dataversion_t store_version; /* updated version expected from store */ 11008e0e7c8SDavid Howells }; 11108e0e7c8SDavid Howells 11208e0e7c8SDavid Howells struct afs_call_type { 11300d3b7a4SDavid Howells const char *name; 11400d3b7a4SDavid Howells 11508e0e7c8SDavid Howells /* deliver request or reply data to an call 11608e0e7c8SDavid Howells * - returning an error will cause the call to be aborted 11708e0e7c8SDavid Howells */ 118d001648eSDavid Howells int (*deliver)(struct afs_call *call); 11908e0e7c8SDavid Howells 12008e0e7c8SDavid Howells /* clean up a call */ 12108e0e7c8SDavid Howells void (*destructor)(struct afs_call *call); 122341f741fSDavid Howells 123341f741fSDavid Howells /* Work function */ 124341f741fSDavid Howells void (*work)(struct work_struct *work); 12508e0e7c8SDavid Howells }; 12608e0e7c8SDavid Howells 12708e0e7c8SDavid Howells /* 128196ee9cdSDavid Howells * Record of an outstanding read operation on a vnode. 129196ee9cdSDavid Howells */ 130196ee9cdSDavid Howells struct afs_read { 131196ee9cdSDavid Howells loff_t pos; /* Where to start reading */ 132e8e581a8SDavid Howells loff_t len; /* How much we're asking for */ 133196ee9cdSDavid Howells loff_t actual_len; /* How much we're actually getting */ 1346a0e3999SDavid Howells loff_t remain; /* Amount remaining */ 135196ee9cdSDavid Howells atomic_t usage; 136196ee9cdSDavid Howells unsigned int index; /* Which page we're reading into */ 137196ee9cdSDavid Howells unsigned int nr_pages; 138196ee9cdSDavid Howells void (*page_done)(struct afs_call *, struct afs_read *); 139196ee9cdSDavid Howells struct page *pages[]; 140196ee9cdSDavid Howells }; 141196ee9cdSDavid Howells 142196ee9cdSDavid Howells /* 14331143d5dSDavid Howells * record of an outstanding writeback on a vnode 14431143d5dSDavid Howells */ 14531143d5dSDavid Howells struct afs_writeback { 14631143d5dSDavid Howells struct list_head link; /* link in vnode->writebacks */ 14731143d5dSDavid Howells struct work_struct writer; /* work item to perform the writeback */ 14831143d5dSDavid Howells struct afs_vnode *vnode; /* vnode to which this write applies */ 14931143d5dSDavid Howells struct key *key; /* owner of this write */ 15031143d5dSDavid Howells wait_queue_head_t waitq; /* completion and ready wait queue */ 15131143d5dSDavid Howells pgoff_t first; /* first page in batch */ 15231143d5dSDavid Howells pgoff_t point; /* last page in current store op */ 15331143d5dSDavid Howells pgoff_t last; /* last page in batch (inclusive) */ 15431143d5dSDavid Howells unsigned offset_first; /* offset into first page of start of write */ 15531143d5dSDavid Howells unsigned to_last; /* offset into last page of end of write */ 15631143d5dSDavid Howells int num_conflicts; /* count of conflicting writes in list */ 15731143d5dSDavid Howells int usage; 15831143d5dSDavid Howells bool conflicts; /* T if has dependent conflicts */ 15931143d5dSDavid Howells enum { 16031143d5dSDavid Howells AFS_WBACK_SYNCING, /* synchronisation being performed */ 16131143d5dSDavid Howells AFS_WBACK_PENDING, /* write pending */ 16231143d5dSDavid Howells AFS_WBACK_CONFLICTING, /* conflicting writes posted */ 16331143d5dSDavid Howells AFS_WBACK_WRITING, /* writing back */ 16431143d5dSDavid Howells AFS_WBACK_COMPLETE /* the writeback record has been unlinked */ 16531143d5dSDavid Howells } state __attribute__((packed)); 16631143d5dSDavid Howells }; 16731143d5dSDavid Howells 16831143d5dSDavid Howells /* 16908e0e7c8SDavid Howells * AFS superblock private data 17008e0e7c8SDavid Howells * - there's one superblock per volume 17108e0e7c8SDavid Howells */ 17208e0e7c8SDavid Howells struct afs_super_info { 173f044c884SDavid Howells struct afs_net *net; /* Network namespace */ 17449566f6fSDavid Howells struct afs_cell *cell; /* The cell in which the volume resides */ 17508e0e7c8SDavid Howells struct afs_volume *volume; /* volume record */ 17608e0e7c8SDavid Howells char rwparent; /* T if parent is R/W AFS volume */ 17708e0e7c8SDavid Howells }; 17808e0e7c8SDavid Howells 17908e0e7c8SDavid Howells static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) 18008e0e7c8SDavid Howells { 18108e0e7c8SDavid Howells return sb->s_fs_info; 18208e0e7c8SDavid Howells } 18308e0e7c8SDavid Howells 18408e0e7c8SDavid Howells extern struct file_system_type afs_fs_type; 18508e0e7c8SDavid Howells 18608e0e7c8SDavid Howells /* 187f044c884SDavid Howells * AFS network namespace record. 188f044c884SDavid Howells */ 189f044c884SDavid Howells struct afs_net { 190f044c884SDavid Howells struct afs_uuid uuid; 191f044c884SDavid Howells bool live; /* F if this namespace is being removed */ 192f044c884SDavid Howells 193f044c884SDavid Howells /* AF_RXRPC I/O stuff */ 194f044c884SDavid Howells struct socket *socket; 195f044c884SDavid Howells struct afs_call *spare_incoming_call; 196f044c884SDavid Howells struct work_struct charge_preallocation_work; 197f044c884SDavid Howells struct mutex socket_mutex; 198f044c884SDavid Howells atomic_t nr_outstanding_calls; 199f044c884SDavid Howells atomic_t nr_superblocks; 200f044c884SDavid Howells 201f044c884SDavid Howells /* Cell database */ 202f044c884SDavid Howells struct list_head cells; 203f044c884SDavid Howells struct afs_cell *ws_cell; 204f044c884SDavid Howells rwlock_t cells_lock; 205f044c884SDavid Howells struct rw_semaphore cells_sem; 206f044c884SDavid Howells wait_queue_head_t cells_freeable_wq; 207f044c884SDavid Howells 208f044c884SDavid Howells struct rw_semaphore proc_cells_sem; 209f044c884SDavid Howells struct list_head proc_cells; 210f044c884SDavid Howells 211f044c884SDavid Howells /* Volume location database */ 212f044c884SDavid Howells struct list_head vl_updates; /* VL records in need-update order */ 213f044c884SDavid Howells struct list_head vl_graveyard; /* Inactive VL records */ 214f044c884SDavid Howells struct delayed_work vl_reaper; 215f044c884SDavid Howells struct delayed_work vl_updater; 216f044c884SDavid Howells spinlock_t vl_updates_lock; 217f044c884SDavid Howells spinlock_t vl_graveyard_lock; 218f044c884SDavid Howells 219f044c884SDavid Howells /* File locking renewal management */ 220f044c884SDavid Howells struct mutex lock_manager_mutex; 221f044c884SDavid Howells 222f044c884SDavid Howells /* Server database */ 223f044c884SDavid Howells struct rb_root servers; /* Active servers */ 224f044c884SDavid Howells rwlock_t servers_lock; 225f044c884SDavid Howells struct list_head server_graveyard; /* Inactive server LRU list */ 226f044c884SDavid Howells spinlock_t server_graveyard_lock; 22759fa1c4aSDavid Howells struct timer_list server_timer; 22859fa1c4aSDavid Howells struct work_struct server_reaper; 22959fa1c4aSDavid Howells atomic_t servers_outstanding; 230f044c884SDavid Howells 231f044c884SDavid Howells /* Misc */ 232f044c884SDavid Howells struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */ 233f044c884SDavid Howells }; 234f044c884SDavid Howells 235f044c884SDavid Howells extern struct afs_net __afs_net;// Dummy AFS network namespace; TODO: replace with real netns 236f044c884SDavid Howells 237f044c884SDavid Howells /* 23808e0e7c8SDavid Howells * AFS cell record 23908e0e7c8SDavid Howells */ 24008e0e7c8SDavid Howells struct afs_cell { 24108e0e7c8SDavid Howells atomic_t usage; 24208e0e7c8SDavid Howells struct list_head link; /* main cell list link */ 243f044c884SDavid Howells struct afs_net *net; /* The network namespace */ 24400d3b7a4SDavid Howells struct key *anonymous_key; /* anonymous user key for this cell */ 24508e0e7c8SDavid Howells struct list_head proc_link; /* /proc cell list link */ 2469b3f26c9SDavid Howells #ifdef CONFIG_AFS_FSCACHE 2479b3f26c9SDavid Howells struct fscache_cookie *cache; /* caching cookie */ 2481da177e4SLinus Torvalds #endif 2491da177e4SLinus Torvalds 25008e0e7c8SDavid Howells /* server record management */ 25108e0e7c8SDavid Howells rwlock_t servers_lock; /* active server list lock */ 25208e0e7c8SDavid Howells struct list_head servers; /* active server list */ 2531da177e4SLinus Torvalds 25408e0e7c8SDavid Howells /* volume location record management */ 25508e0e7c8SDavid Howells struct rw_semaphore vl_sem; /* volume management serialisation semaphore */ 25608e0e7c8SDavid Howells struct list_head vl_list; /* cell's active VL record list */ 25708e0e7c8SDavid Howells spinlock_t vl_lock; /* vl_list lock */ 25808e0e7c8SDavid Howells unsigned short vl_naddrs; /* number of VL servers in addr list */ 25908e0e7c8SDavid Howells unsigned short vl_curr_svix; /* current server index */ 2604d9df986SDavid Howells struct sockaddr_rxrpc vl_addrs[AFS_CELL_MAX_ADDRS]; /* cell VL server addresses */ 26108e0e7c8SDavid Howells 26208e0e7c8SDavid Howells char name[0]; /* cell name - must go last */ 26308e0e7c8SDavid Howells }; 26408e0e7c8SDavid Howells 26508e0e7c8SDavid Howells /* 26608e0e7c8SDavid Howells * entry in the cached volume location catalogue 26708e0e7c8SDavid Howells */ 26808e0e7c8SDavid Howells struct afs_cache_vlocation { 26900d3b7a4SDavid Howells /* volume name (lowercase, padded with NULs) */ 27000d3b7a4SDavid Howells uint8_t name[AFS_MAXVOLNAME + 1]; 27100d3b7a4SDavid Howells 27208e0e7c8SDavid Howells uint8_t nservers; /* number of entries used in servers[] */ 27308e0e7c8SDavid Howells uint8_t vidmask; /* voltype mask for vid[] */ 27408e0e7c8SDavid Howells uint8_t srvtmask[8]; /* voltype masks for servers[] */ 27508e0e7c8SDavid Howells #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ 27608e0e7c8SDavid Howells #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ 27708e0e7c8SDavid Howells #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ 27808e0e7c8SDavid Howells 27908e0e7c8SDavid Howells afs_volid_t vid[3]; /* volume IDs for R/W, R/O and Bak volumes */ 2804d9df986SDavid Howells struct sockaddr_rxrpc servers[8]; /* fileserver addresses */ 28108e0e7c8SDavid Howells time_t rtime; /* last retrieval time */ 28208e0e7c8SDavid Howells }; 28308e0e7c8SDavid Howells 28408e0e7c8SDavid Howells /* 28508e0e7c8SDavid Howells * AFS volume location record 28608e0e7c8SDavid Howells */ 28708e0e7c8SDavid Howells struct afs_vlocation { 28808e0e7c8SDavid Howells atomic_t usage; 2898a79790bSTina Ruchandani time64_t time_of_death; /* time at which put reduced usage to 0 */ 29008e0e7c8SDavid Howells struct list_head link; /* link in cell volume location list */ 29108e0e7c8SDavid Howells struct list_head grave; /* link in master graveyard list */ 29208e0e7c8SDavid Howells struct list_head update; /* link in master update list */ 29308e0e7c8SDavid Howells struct afs_cell *cell; /* cell to which volume belongs */ 29408e0e7c8SDavid Howells struct afs_cache_vlocation vldb; /* volume information DB record */ 29508e0e7c8SDavid Howells struct afs_volume *vols[3]; /* volume access record pointer (index by type) */ 29608e0e7c8SDavid Howells wait_queue_head_t waitq; /* status change waitqueue */ 2978a79790bSTina Ruchandani time64_t update_at; /* time at which record should be updated */ 29839bf0949SDavid S. Miller spinlock_t lock; /* access lock */ 29908e0e7c8SDavid Howells afs_vlocation_state_t state; /* volume location state */ 30008e0e7c8SDavid Howells unsigned short upd_rej_cnt; /* ENOMEDIUM count during update */ 30108e0e7c8SDavid Howells unsigned short upd_busy_cnt; /* EBUSY count during update */ 30208e0e7c8SDavid Howells bool valid; /* T if valid */ 30308e0e7c8SDavid Howells }; 30408e0e7c8SDavid Howells 30508e0e7c8SDavid Howells /* 30608e0e7c8SDavid Howells * AFS fileserver record 30708e0e7c8SDavid Howells */ 30808e0e7c8SDavid Howells struct afs_server { 30908e0e7c8SDavid Howells atomic_t usage; 3108a79790bSTina Ruchandani time64_t time_of_death; /* time at which put reduced usage to 0 */ 3114d9df986SDavid Howells struct sockaddr_rxrpc addr; /* server address */ 3129ed900b1SDavid Howells struct afs_net *net; /* Network namespace in which the server resides */ 31308e0e7c8SDavid Howells struct afs_cell *cell; /* cell in which server resides */ 31408e0e7c8SDavid Howells struct list_head link; /* link in cell's server list */ 31508e0e7c8SDavid Howells struct list_head grave; /* link in master graveyard list */ 31608e0e7c8SDavid Howells struct rb_node master_rb; /* link in master by-addr tree */ 31708e0e7c8SDavid Howells struct rw_semaphore sem; /* access lock */ 31808e0e7c8SDavid Howells 31908e0e7c8SDavid Howells /* file service access */ 32008e0e7c8SDavid Howells struct rb_root fs_vnodes; /* vnodes backed by this server (ordered by FID) */ 32108e0e7c8SDavid Howells unsigned long fs_act_jif; /* time at which last activity occurred */ 32208e0e7c8SDavid Howells unsigned long fs_dead_jif; /* time at which no longer to be considered dead */ 32308e0e7c8SDavid Howells spinlock_t fs_lock; /* access lock */ 32408e0e7c8SDavid Howells int fs_state; /* 0 or reason FS currently marked dead (-errno) */ 32508e0e7c8SDavid Howells 32608e0e7c8SDavid Howells /* callback promise management */ 32708e0e7c8SDavid Howells struct rb_root cb_promises; /* vnode expiration list (ordered earliest first) */ 32808e0e7c8SDavid Howells struct delayed_work cb_updater; /* callback updater */ 32908e0e7c8SDavid Howells struct delayed_work cb_break_work; /* collected break dispatcher */ 33008e0e7c8SDavid Howells wait_queue_head_t cb_break_waitq; /* space available in cb_break waitqueue */ 33108e0e7c8SDavid Howells spinlock_t cb_lock; /* access lock */ 33208e0e7c8SDavid Howells struct afs_callback cb_break[64]; /* ring of callbacks awaiting breaking */ 33308e0e7c8SDavid Howells atomic_t cb_break_n; /* number of pending breaks */ 33408e0e7c8SDavid Howells u8 cb_break_head; /* head of callback breaking ring */ 33508e0e7c8SDavid Howells u8 cb_break_tail; /* tail of callback breaking ring */ 33608e0e7c8SDavid Howells }; 33708e0e7c8SDavid Howells 33808e0e7c8SDavid Howells /* 33908e0e7c8SDavid Howells * AFS volume access record 34008e0e7c8SDavid Howells */ 34108e0e7c8SDavid Howells struct afs_volume { 34208e0e7c8SDavid Howells atomic_t usage; 34308e0e7c8SDavid Howells struct afs_cell *cell; /* cell to which belongs (unrefd ptr) */ 34408e0e7c8SDavid Howells struct afs_vlocation *vlocation; /* volume location */ 3459b3f26c9SDavid Howells #ifdef CONFIG_AFS_FSCACHE 3469b3f26c9SDavid Howells struct fscache_cookie *cache; /* caching cookie */ 34708e0e7c8SDavid Howells #endif 34808e0e7c8SDavid Howells afs_volid_t vid; /* volume ID */ 34908e0e7c8SDavid Howells afs_voltype_t type; /* type of volume */ 35008e0e7c8SDavid Howells char type_force; /* force volume type (suppress R/O -> R/W) */ 35108e0e7c8SDavid Howells unsigned short nservers; /* number of server slots filled */ 35208e0e7c8SDavid Howells unsigned short rjservers; /* number of servers discarded due to -ENOMEDIUM */ 35308e0e7c8SDavid Howells struct afs_server *servers[8]; /* servers on which volume resides (ordered) */ 35408e0e7c8SDavid Howells struct rw_semaphore server_sem; /* lock for accessing current server */ 35508e0e7c8SDavid Howells }; 35608e0e7c8SDavid Howells 35708e0e7c8SDavid Howells /* 35808e0e7c8SDavid Howells * vnode catalogue entry 35908e0e7c8SDavid Howells */ 36008e0e7c8SDavid Howells struct afs_cache_vnode { 36108e0e7c8SDavid Howells afs_vnodeid_t vnode_id; /* vnode ID */ 36208e0e7c8SDavid Howells unsigned vnode_unique; /* vnode ID uniquifier */ 36308e0e7c8SDavid Howells afs_dataversion_t data_version; /* data version */ 36408e0e7c8SDavid Howells }; 36508e0e7c8SDavid Howells 36608e0e7c8SDavid Howells /* 36708e0e7c8SDavid Howells * AFS inode private data 36808e0e7c8SDavid Howells */ 36908e0e7c8SDavid Howells struct afs_vnode { 37008e0e7c8SDavid Howells struct inode vfs_inode; /* the VFS's inode record */ 37108e0e7c8SDavid Howells 37208e0e7c8SDavid Howells struct afs_volume *volume; /* volume on which vnode resides */ 37308e0e7c8SDavid Howells struct afs_server *server; /* server currently supplying this file */ 37408e0e7c8SDavid Howells struct afs_fid fid; /* the file identifier for this inode */ 37508e0e7c8SDavid Howells struct afs_file_status status; /* AFS status info for this file */ 3769b3f26c9SDavid Howells #ifdef CONFIG_AFS_FSCACHE 3779b3f26c9SDavid Howells struct fscache_cookie *cache; /* caching cookie */ 37808e0e7c8SDavid Howells #endif 37900d3b7a4SDavid Howells struct afs_permits *permits; /* cache of permits so far obtained */ 38000d3b7a4SDavid Howells struct mutex permits_lock; /* lock for altering permits list */ 381260a9803SDavid Howells struct mutex validate_lock; /* lock for validating this vnode */ 38208e0e7c8SDavid Howells wait_queue_head_t update_waitq; /* status fetch waitqueue */ 383260a9803SDavid Howells int update_cnt; /* number of outstanding ops that will update the 38408e0e7c8SDavid Howells * status */ 38531143d5dSDavid Howells spinlock_t writeback_lock; /* lock for writebacks */ 38608e0e7c8SDavid Howells spinlock_t lock; /* waitqueue/flags lock */ 38708e0e7c8SDavid Howells unsigned long flags; 38808e0e7c8SDavid Howells #define AFS_VNODE_CB_BROKEN 0 /* set if vnode's callback was broken */ 389260a9803SDavid Howells #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ 39008e0e7c8SDavid Howells #define AFS_VNODE_MODIFIED 2 /* set if vnode's data modified */ 39108e0e7c8SDavid Howells #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ 39208e0e7c8SDavid Howells #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ 39308e0e7c8SDavid Howells #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ 394e8d6c554SDavid Howells #define AFS_VNODE_LOCKING 6 /* set if waiting for lock on vnode */ 395e8d6c554SDavid Howells #define AFS_VNODE_READLOCKED 7 /* set if vnode is read-locked on the server */ 396e8d6c554SDavid Howells #define AFS_VNODE_WRITELOCKED 8 /* set if vnode is write-locked on the server */ 397e8d6c554SDavid Howells #define AFS_VNODE_UNLOCKING 9 /* set if vnode is being unlocked on the server */ 398bec5eb61Swanglei #define AFS_VNODE_AUTOCELL 10 /* set if Vnode is an auto mount point */ 399bec5eb61Swanglei #define AFS_VNODE_PSEUDODIR 11 /* set if Vnode is a pseudo directory */ 40008e0e7c8SDavid Howells 40100d3b7a4SDavid Howells long acl_order; /* ACL check count (callback break count) */ 40200d3b7a4SDavid Howells 40331143d5dSDavid Howells struct list_head writebacks; /* alterations in pagecache that need writing */ 404e8d6c554SDavid Howells struct list_head pending_locks; /* locks waiting to be granted */ 405e8d6c554SDavid Howells struct list_head granted_locks; /* locks granted on this file */ 406e8d6c554SDavid Howells struct delayed_work lock_work; /* work to be done in locking */ 407e8d6c554SDavid Howells struct key *unlock_key; /* key to be used in unlocking */ 40831143d5dSDavid Howells 40908e0e7c8SDavid Howells /* outstanding callback notification on this file */ 41008e0e7c8SDavid Howells struct rb_node server_rb; /* link in server->fs_vnodes */ 41108e0e7c8SDavid Howells struct rb_node cb_promise; /* link in server->cb_promises */ 41208e0e7c8SDavid Howells struct work_struct cb_broken_work; /* work to be done on callback break */ 41356e71431STina Ruchandani time64_t cb_expires; /* time at which callback expires */ 41456e71431STina Ruchandani time64_t cb_expires_at; /* time used to order cb_promise */ 41508e0e7c8SDavid Howells unsigned cb_version; /* callback version */ 41608e0e7c8SDavid Howells unsigned cb_expiry; /* callback expiry time */ 41708e0e7c8SDavid Howells afs_callback_type_t cb_type; /* type of callback */ 41808e0e7c8SDavid Howells bool cb_promised; /* true if promise still holds */ 41908e0e7c8SDavid Howells }; 42008e0e7c8SDavid Howells 42100d3b7a4SDavid Howells /* 42200d3b7a4SDavid Howells * cached security record for one user's attempt to access a vnode 42300d3b7a4SDavid Howells */ 42400d3b7a4SDavid Howells struct afs_permit { 42500d3b7a4SDavid Howells struct key *key; /* RxRPC ticket holding a security context */ 42600d3b7a4SDavid Howells afs_access_t access_mask; /* access mask for this key */ 42700d3b7a4SDavid Howells }; 42800d3b7a4SDavid Howells 42900d3b7a4SDavid Howells /* 43000d3b7a4SDavid Howells * cache of security records from attempts to access a vnode 43100d3b7a4SDavid Howells */ 43200d3b7a4SDavid Howells struct afs_permits { 43300d3b7a4SDavid Howells struct rcu_head rcu; /* disposal procedure */ 43400d3b7a4SDavid Howells int count; /* number of records */ 43500d3b7a4SDavid Howells struct afs_permit permits[0]; /* the permits so far examined */ 43600d3b7a4SDavid Howells }; 43700d3b7a4SDavid Howells 438b908fe6bSDavid Howells /* 439b908fe6bSDavid Howells * record of one of a system's set of network interfaces 440b908fe6bSDavid Howells */ 441b908fe6bSDavid Howells struct afs_interface { 442b908fe6bSDavid Howells struct in_addr address; /* IPv4 address bound to interface */ 443b908fe6bSDavid Howells struct in_addr netmask; /* netmask applied to address */ 444b908fe6bSDavid Howells unsigned mtu; /* MTU of interface */ 445b908fe6bSDavid Howells }; 446b908fe6bSDavid Howells 44708e0e7c8SDavid Howells /*****************************************************************************/ 44808e0e7c8SDavid Howells /* 4499b3f26c9SDavid Howells * cache.c 4509b3f26c9SDavid Howells */ 4519b3f26c9SDavid Howells #ifdef CONFIG_AFS_FSCACHE 4529b3f26c9SDavid Howells extern struct fscache_netfs afs_cache_netfs; 4539b3f26c9SDavid Howells extern struct fscache_cookie_def afs_cell_cache_index_def; 4549b3f26c9SDavid Howells extern struct fscache_cookie_def afs_volume_cache_index_def; 4559b3f26c9SDavid Howells extern struct fscache_cookie_def afs_vnode_cache_index_def; 4569b3f26c9SDavid Howells #else 4579b3f26c9SDavid Howells #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL) 4589b3f26c9SDavid Howells #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL) 4599b3f26c9SDavid Howells #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL) 4609b3f26c9SDavid Howells #endif 4619b3f26c9SDavid Howells 4629b3f26c9SDavid Howells /* 46308e0e7c8SDavid Howells * callback.c 46408e0e7c8SDavid Howells */ 465f044c884SDavid Howells extern struct workqueue_struct *afs_callback_update_worker; 466f044c884SDavid Howells 46708e0e7c8SDavid Howells extern void afs_init_callback_state(struct afs_server *); 46808e0e7c8SDavid Howells extern void afs_broken_callback_work(struct work_struct *); 46908e0e7c8SDavid Howells extern void afs_break_callbacks(struct afs_server *, size_t, 47008e0e7c8SDavid Howells struct afs_callback[]); 471260a9803SDavid Howells extern void afs_discard_callback_on_delete(struct afs_vnode *); 47208e0e7c8SDavid Howells extern void afs_give_up_callback(struct afs_vnode *); 47308e0e7c8SDavid Howells extern void afs_dispatch_give_up_callbacks(struct work_struct *); 47408e0e7c8SDavid Howells extern void afs_flush_callback_breaks(struct afs_server *); 4751da177e4SLinus Torvalds 4761da177e4SLinus Torvalds /* 4771da177e4SLinus Torvalds * cell.c 4781da177e4SLinus Torvalds */ 47949566f6fSDavid Howells static inline struct afs_cell *afs_get_cell(struct afs_cell *cell) 48049566f6fSDavid Howells { 48149566f6fSDavid Howells if (cell) 48249566f6fSDavid Howells atomic_inc(&cell->usage); 48349566f6fSDavid Howells return cell; 48449566f6fSDavid Howells } 485f044c884SDavid Howells extern int afs_cell_init(struct afs_net *, char *); 486f044c884SDavid Howells extern struct afs_cell *afs_cell_create(struct afs_net *, const char *, unsigned, char *, bool); 487f044c884SDavid Howells extern struct afs_cell *afs_cell_lookup(struct afs_net *, const char *, unsigned, bool); 48808e0e7c8SDavid Howells extern struct afs_cell *afs_grab_cell(struct afs_cell *); 4899ed900b1SDavid Howells extern void afs_put_cell(struct afs_net *, struct afs_cell *); 490f044c884SDavid Howells extern void __net_exit afs_cell_purge(struct afs_net *); 49108e0e7c8SDavid Howells 49208e0e7c8SDavid Howells /* 49308e0e7c8SDavid Howells * cmservice.c 49408e0e7c8SDavid Howells */ 49508e0e7c8SDavid Howells extern bool afs_cm_incoming_call(struct afs_call *); 49608e0e7c8SDavid Howells 4971da177e4SLinus Torvalds /* 4981da177e4SLinus Torvalds * dir.c 4991da177e4SLinus Torvalds */ 500754661f1SArjan van de Ven extern const struct inode_operations afs_dir_inode_operations; 501d61dcce2SAl Viro extern const struct dentry_operations afs_fs_dentry_operations; 5024b6f5d20SArjan van de Ven extern const struct file_operations afs_dir_file_operations; 5031da177e4SLinus Torvalds 5041da177e4SLinus Torvalds /* 5051da177e4SLinus Torvalds * file.c 5061da177e4SLinus Torvalds */ 507f5e54d6eSChristoph Hellwig extern const struct address_space_operations afs_fs_aops; 508754661f1SArjan van de Ven extern const struct inode_operations afs_file_inode_operations; 50900d3b7a4SDavid Howells extern const struct file_operations afs_file_operations; 51000d3b7a4SDavid Howells 51100d3b7a4SDavid Howells extern int afs_open(struct inode *, struct file *); 51200d3b7a4SDavid Howells extern int afs_release(struct inode *, struct file *); 513f6d335c0SAl Viro extern int afs_page_filler(void *, struct page *); 514196ee9cdSDavid Howells extern void afs_put_read(struct afs_read *); 5151da177e4SLinus Torvalds 5161da177e4SLinus Torvalds /* 517e8d6c554SDavid Howells * flock.c 518e8d6c554SDavid Howells */ 519f044c884SDavid Howells extern struct workqueue_struct *afs_lock_manager; 520f044c884SDavid Howells 521e8d6c554SDavid Howells extern void afs_lock_work(struct work_struct *); 522e8d6c554SDavid Howells extern void afs_lock_may_be_available(struct afs_vnode *); 523e8d6c554SDavid Howells extern int afs_lock(struct file *, int, struct file_lock *); 524e8d6c554SDavid Howells extern int afs_flock(struct file *, int, struct file_lock *); 525e8d6c554SDavid Howells 526e8d6c554SDavid Howells /* 52708e0e7c8SDavid Howells * fsclient.c 52808e0e7c8SDavid Howells */ 52900d3b7a4SDavid Howells extern int afs_fs_fetch_file_status(struct afs_server *, struct key *, 53000d3b7a4SDavid Howells struct afs_vnode *, struct afs_volsync *, 53156ff9c83SDavid Howells bool); 532f044c884SDavid Howells extern int afs_fs_give_up_callbacks(struct afs_net *, struct afs_server *, bool); 53300d3b7a4SDavid Howells extern int afs_fs_fetch_data(struct afs_server *, struct key *, 53456ff9c83SDavid Howells struct afs_vnode *, struct afs_read *, bool); 535260a9803SDavid Howells extern int afs_fs_create(struct afs_server *, struct key *, 536260a9803SDavid Howells struct afs_vnode *, const char *, umode_t, 537260a9803SDavid Howells struct afs_fid *, struct afs_file_status *, 53856ff9c83SDavid Howells struct afs_callback *, bool); 539260a9803SDavid Howells extern int afs_fs_remove(struct afs_server *, struct key *, 54056ff9c83SDavid Howells struct afs_vnode *, const char *, bool, bool); 541260a9803SDavid Howells extern int afs_fs_link(struct afs_server *, struct key *, struct afs_vnode *, 54256ff9c83SDavid Howells struct afs_vnode *, const char *, bool); 543260a9803SDavid Howells extern int afs_fs_symlink(struct afs_server *, struct key *, 544260a9803SDavid Howells struct afs_vnode *, const char *, const char *, 54556ff9c83SDavid Howells struct afs_fid *, struct afs_file_status *, bool); 546260a9803SDavid Howells extern int afs_fs_rename(struct afs_server *, struct key *, 547260a9803SDavid Howells struct afs_vnode *, const char *, 54856ff9c83SDavid Howells struct afs_vnode *, const char *, bool); 54931143d5dSDavid Howells extern int afs_fs_store_data(struct afs_server *, struct afs_writeback *, 55056ff9c83SDavid Howells pgoff_t, pgoff_t, unsigned, unsigned, bool); 55131143d5dSDavid Howells extern int afs_fs_setattr(struct afs_server *, struct key *, 55256ff9c83SDavid Howells struct afs_vnode *, struct iattr *, bool); 55345222b9eSDavid Howells extern int afs_fs_get_volume_status(struct afs_server *, struct key *, 55445222b9eSDavid Howells struct afs_vnode *, 55556ff9c83SDavid Howells struct afs_volume_status *, bool); 556e8d6c554SDavid Howells extern int afs_fs_set_lock(struct afs_server *, struct key *, 55756ff9c83SDavid Howells struct afs_vnode *, afs_lock_type_t, bool); 558e8d6c554SDavid Howells extern int afs_fs_extend_lock(struct afs_server *, struct key *, 55956ff9c83SDavid Howells struct afs_vnode *, bool); 560e8d6c554SDavid Howells extern int afs_fs_release_lock(struct afs_server *, struct key *, 56156ff9c83SDavid Howells struct afs_vnode *, bool); 56208e0e7c8SDavid Howells 56308e0e7c8SDavid Howells /* 5641da177e4SLinus Torvalds * inode.c 5651da177e4SLinus Torvalds */ 566bec5eb61Swanglei extern struct inode *afs_iget_autocell(struct inode *, const char *, int, 567bec5eb61Swanglei struct key *); 56800d3b7a4SDavid Howells extern struct inode *afs_iget(struct super_block *, struct key *, 569260a9803SDavid Howells struct afs_fid *, struct afs_file_status *, 570260a9803SDavid Howells struct afs_callback *); 571416351f2SDavid Howells extern void afs_zap_data(struct afs_vnode *); 572260a9803SDavid Howells extern int afs_validate(struct afs_vnode *, struct key *); 573a528d35eSDavid Howells extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int); 57431143d5dSDavid Howells extern int afs_setattr(struct dentry *, struct iattr *); 575b57922d9SAl Viro extern void afs_evict_inode(struct inode *); 576bec5eb61Swanglei extern int afs_drop_inode(struct inode *); 5771da177e4SLinus Torvalds 5781da177e4SLinus Torvalds /* 5791da177e4SLinus Torvalds * main.c 5801da177e4SLinus Torvalds */ 5810ad53eeeSTejun Heo extern struct workqueue_struct *afs_wq; 582f044c884SDavid Howells 583f044c884SDavid Howells static inline struct afs_net *afs_d2net(struct dentry *dentry) 584f044c884SDavid Howells { 585f044c884SDavid Howells return &__afs_net; 586f044c884SDavid Howells } 587f044c884SDavid Howells 588f044c884SDavid Howells static inline struct afs_net *afs_i2net(struct inode *inode) 589f044c884SDavid Howells { 590f044c884SDavid Howells return &__afs_net; 591f044c884SDavid Howells } 592f044c884SDavid Howells 593f044c884SDavid Howells static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) 594f044c884SDavid Howells { 595f044c884SDavid Howells return &__afs_net; 596f044c884SDavid Howells } 597f044c884SDavid Howells 598f044c884SDavid Howells static inline struct afs_net *afs_sock2net(struct sock *sk) 599f044c884SDavid Howells { 600f044c884SDavid Howells return &__afs_net; 601f044c884SDavid Howells } 602f044c884SDavid Howells 603f044c884SDavid Howells static inline struct afs_net *afs_get_net(struct afs_net *net) 604f044c884SDavid Howells { 605f044c884SDavid Howells return net; 606f044c884SDavid Howells } 607f044c884SDavid Howells 608f044c884SDavid Howells static inline void afs_put_net(struct afs_net *net) 609f044c884SDavid Howells { 610f044c884SDavid Howells } 6111da177e4SLinus Torvalds 6121da177e4SLinus Torvalds /* 61308e0e7c8SDavid Howells * misc.c 61408e0e7c8SDavid Howells */ 61508e0e7c8SDavid Howells extern int afs_abort_to_error(u32); 61608e0e7c8SDavid Howells 61708e0e7c8SDavid Howells /* 6181da177e4SLinus Torvalds * mntpt.c 6191da177e4SLinus Torvalds */ 620754661f1SArjan van de Ven extern const struct inode_operations afs_mntpt_inode_operations; 621bec5eb61Swanglei extern const struct inode_operations afs_autocell_inode_operations; 6224b6f5d20SArjan van de Ven extern const struct file_operations afs_mntpt_file_operations; 6231da177e4SLinus Torvalds 624d18610b0SDavid Howells extern struct vfsmount *afs_d_automount(struct path *); 62508e0e7c8SDavid Howells extern void afs_mntpt_kill_timer(void); 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds /* 628b4db2b35SArnd Bergmann * netdevices.c 629b4db2b35SArnd Bergmann */ 630b4db2b35SArnd Bergmann extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool); 631b4db2b35SArnd Bergmann 632b4db2b35SArnd Bergmann /* 6331da177e4SLinus Torvalds * proc.c 6341da177e4SLinus Torvalds */ 635f044c884SDavid Howells extern int __net_init afs_proc_init(struct afs_net *); 636f044c884SDavid Howells extern void __net_exit afs_proc_cleanup(struct afs_net *); 637f044c884SDavid Howells extern int afs_proc_cell_setup(struct afs_net *, struct afs_cell *); 638f044c884SDavid Howells extern void afs_proc_cell_remove(struct afs_net *, struct afs_cell *); 6391da177e4SLinus Torvalds 64008e0e7c8SDavid Howells /* 64108e0e7c8SDavid Howells * rxrpc.c 64208e0e7c8SDavid Howells */ 643f044c884SDavid Howells extern struct workqueue_struct *afs_async_calls; 6448324f0bcSDavid Howells 645f044c884SDavid Howells extern int __net_init afs_open_socket(struct afs_net *); 646f044c884SDavid Howells extern void __net_exit afs_close_socket(struct afs_net *); 647f044c884SDavid Howells extern void afs_charge_preallocation(struct work_struct *); 648341f741fSDavid Howells extern void afs_put_call(struct afs_call *); 649341f741fSDavid Howells extern int afs_queue_call_work(struct afs_call *); 6504d9df986SDavid Howells extern int afs_make_call(struct sockaddr_rxrpc *, struct afs_call *, gfp_t, bool); 651f044c884SDavid Howells extern struct afs_call *afs_alloc_flat_call(struct afs_net *, 652f044c884SDavid Howells const struct afs_call_type *, 65308e0e7c8SDavid Howells size_t, size_t); 65408e0e7c8SDavid Howells extern void afs_flat_call_destructor(struct afs_call *); 65508e0e7c8SDavid Howells extern void afs_send_empty_reply(struct afs_call *); 656b908fe6bSDavid Howells extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); 657d001648eSDavid Howells extern int afs_extract_data(struct afs_call *, void *, size_t, bool); 65808e0e7c8SDavid Howells 659d001648eSDavid Howells static inline int afs_transfer_reply(struct afs_call *call) 660372ee163SDavid Howells { 661d001648eSDavid Howells return afs_extract_data(call, call->buffer, call->reply_max, false); 662372ee163SDavid Howells } 663372ee163SDavid Howells 66408e0e7c8SDavid Howells /* 66500d3b7a4SDavid Howells * security.c 66600d3b7a4SDavid Howells */ 66700d3b7a4SDavid Howells extern void afs_clear_permits(struct afs_vnode *); 66800d3b7a4SDavid Howells extern void afs_cache_permit(struct afs_vnode *, struct key *, long); 669416351f2SDavid Howells extern void afs_zap_permits(struct rcu_head *); 67000d3b7a4SDavid Howells extern struct key *afs_request_key(struct afs_cell *); 67110556cb2SAl Viro extern int afs_permission(struct inode *, int); 67200d3b7a4SDavid Howells 67300d3b7a4SDavid Howells /* 67408e0e7c8SDavid Howells * server.c 67508e0e7c8SDavid Howells */ 67608e0e7c8SDavid Howells extern spinlock_t afs_server_peer_lock; 67708e0e7c8SDavid Howells 678260a9803SDavid Howells #define afs_get_server(S) \ 679260a9803SDavid Howells do { \ 680260a9803SDavid Howells _debug("GET SERVER %d", atomic_read(&(S)->usage)); \ 681260a9803SDavid Howells atomic_inc(&(S)->usage); \ 682260a9803SDavid Howells } while(0) 68308e0e7c8SDavid Howells 68459fa1c4aSDavid Howells extern void afs_server_timer(struct timer_list *); 68508e0e7c8SDavid Howells extern struct afs_server *afs_lookup_server(struct afs_cell *, 6864d9df986SDavid Howells struct sockaddr_rxrpc *); 687f044c884SDavid Howells extern struct afs_server *afs_find_server(struct afs_net *, 688f044c884SDavid Howells const struct sockaddr_rxrpc *); 6899ed900b1SDavid Howells extern void afs_put_server(struct afs_net *, struct afs_server *); 690f044c884SDavid Howells extern void afs_reap_server(struct work_struct *); 691f044c884SDavid Howells extern void __net_exit afs_purge_servers(struct afs_net *); 69208e0e7c8SDavid Howells 69308e0e7c8SDavid Howells /* 69400d3b7a4SDavid Howells * super.c 69500d3b7a4SDavid Howells */ 696f044c884SDavid Howells extern int __init afs_fs_init(void); 697f044c884SDavid Howells extern void __exit afs_fs_exit(void); 69800d3b7a4SDavid Howells 69900d3b7a4SDavid Howells /* 70008e0e7c8SDavid Howells * vlclient.c 70108e0e7c8SDavid Howells */ 702f044c884SDavid Howells extern int afs_vl_get_entry_by_name(struct afs_net *, 7034d9df986SDavid Howells struct sockaddr_rxrpc *, struct key *, 70400d3b7a4SDavid Howells const char *, struct afs_cache_vlocation *, 70556ff9c83SDavid Howells bool); 706f044c884SDavid Howells extern int afs_vl_get_entry_by_id(struct afs_net *, 7074d9df986SDavid Howells struct sockaddr_rxrpc *, struct key *, 70800d3b7a4SDavid Howells afs_volid_t, afs_voltype_t, 70956ff9c83SDavid Howells struct afs_cache_vlocation *, bool); 71008e0e7c8SDavid Howells 71108e0e7c8SDavid Howells /* 71208e0e7c8SDavid Howells * vlocation.c 71308e0e7c8SDavid Howells */ 714f044c884SDavid Howells extern struct workqueue_struct *afs_vlocation_update_worker; 715f044c884SDavid Howells 71608e0e7c8SDavid Howells #define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0) 71708e0e7c8SDavid Howells 718f044c884SDavid Howells extern struct afs_vlocation *afs_vlocation_lookup(struct afs_net *, 719f044c884SDavid Howells struct afs_cell *, 72000d3b7a4SDavid Howells struct key *, 72108e0e7c8SDavid Howells const char *, size_t); 722f044c884SDavid Howells extern void afs_put_vlocation(struct afs_net *, struct afs_vlocation *); 723f044c884SDavid Howells extern void afs_vlocation_updater(struct work_struct *); 724f044c884SDavid Howells extern void afs_vlocation_reaper(struct work_struct *); 725f044c884SDavid Howells extern void __net_exit afs_vlocation_purge(struct afs_net *); 72608e0e7c8SDavid Howells 72708e0e7c8SDavid Howells /* 72808e0e7c8SDavid Howells * vnode.c 72908e0e7c8SDavid Howells */ 73008e0e7c8SDavid Howells static inline struct afs_vnode *AFS_FS_I(struct inode *inode) 73108e0e7c8SDavid Howells { 73208e0e7c8SDavid Howells return container_of(inode, struct afs_vnode, vfs_inode); 73308e0e7c8SDavid Howells } 73408e0e7c8SDavid Howells 73508e0e7c8SDavid Howells static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) 73608e0e7c8SDavid Howells { 73708e0e7c8SDavid Howells return &vnode->vfs_inode; 73808e0e7c8SDavid Howells } 73908e0e7c8SDavid Howells 740260a9803SDavid Howells extern void afs_vnode_finalise_status_update(struct afs_vnode *, 741260a9803SDavid Howells struct afs_server *); 74200d3b7a4SDavid Howells extern int afs_vnode_fetch_status(struct afs_vnode *, struct afs_vnode *, 74300d3b7a4SDavid Howells struct key *); 74400d3b7a4SDavid Howells extern int afs_vnode_fetch_data(struct afs_vnode *, struct key *, 745196ee9cdSDavid Howells struct afs_read *); 746260a9803SDavid Howells extern int afs_vnode_create(struct afs_vnode *, struct key *, const char *, 747260a9803SDavid Howells umode_t, struct afs_fid *, struct afs_file_status *, 748260a9803SDavid Howells struct afs_callback *, struct afs_server **); 749260a9803SDavid Howells extern int afs_vnode_remove(struct afs_vnode *, struct key *, const char *, 750260a9803SDavid Howells bool); 751260a9803SDavid Howells extern int afs_vnode_link(struct afs_vnode *, struct afs_vnode *, struct key *, 752260a9803SDavid Howells const char *); 753260a9803SDavid Howells extern int afs_vnode_symlink(struct afs_vnode *, struct key *, const char *, 754260a9803SDavid Howells const char *, struct afs_fid *, 755260a9803SDavid Howells struct afs_file_status *, struct afs_server **); 756260a9803SDavid Howells extern int afs_vnode_rename(struct afs_vnode *, struct afs_vnode *, 757260a9803SDavid Howells struct key *, const char *, const char *); 75831143d5dSDavid Howells extern int afs_vnode_store_data(struct afs_writeback *, pgoff_t, pgoff_t, 75931143d5dSDavid Howells unsigned, unsigned); 76031143d5dSDavid Howells extern int afs_vnode_setattr(struct afs_vnode *, struct key *, struct iattr *); 76145222b9eSDavid Howells extern int afs_vnode_get_volume_status(struct afs_vnode *, struct key *, 76245222b9eSDavid Howells struct afs_volume_status *); 763e8d6c554SDavid Howells extern int afs_vnode_set_lock(struct afs_vnode *, struct key *, 764e8d6c554SDavid Howells afs_lock_type_t); 765e8d6c554SDavid Howells extern int afs_vnode_extend_lock(struct afs_vnode *, struct key *); 766e8d6c554SDavid Howells extern int afs_vnode_release_lock(struct afs_vnode *, struct key *); 76708e0e7c8SDavid Howells 76808e0e7c8SDavid Howells /* 76908e0e7c8SDavid Howells * volume.c 77008e0e7c8SDavid Howells */ 77149566f6fSDavid Howells static inline struct afs_volume *afs_get_volume(struct afs_volume *volume) 77249566f6fSDavid Howells { 77349566f6fSDavid Howells if (volume) 77449566f6fSDavid Howells atomic_inc(&volume->usage); 77549566f6fSDavid Howells return volume; 77649566f6fSDavid Howells } 77708e0e7c8SDavid Howells 7789ed900b1SDavid Howells extern void afs_put_volume(struct afs_cell *, struct afs_volume *); 77900d3b7a4SDavid Howells extern struct afs_volume *afs_volume_lookup(struct afs_mount_params *); 78008e0e7c8SDavid Howells extern struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *); 78108e0e7c8SDavid Howells extern int afs_volume_release_fileserver(struct afs_vnode *, 78208e0e7c8SDavid Howells struct afs_server *, int); 78308e0e7c8SDavid Howells 78431143d5dSDavid Howells /* 78531143d5dSDavid Howells * write.c 78631143d5dSDavid Howells */ 78731143d5dSDavid Howells extern int afs_set_page_dirty(struct page *); 78831143d5dSDavid Howells extern void afs_put_writeback(struct afs_writeback *); 78915b4650eSNick Piggin extern int afs_write_begin(struct file *file, struct address_space *mapping, 79015b4650eSNick Piggin loff_t pos, unsigned len, unsigned flags, 79115b4650eSNick Piggin struct page **pagep, void **fsdata); 79215b4650eSNick Piggin extern int afs_write_end(struct file *file, struct address_space *mapping, 79315b4650eSNick Piggin loff_t pos, unsigned len, unsigned copied, 79415b4650eSNick Piggin struct page *page, void *fsdata); 79531143d5dSDavid Howells extern int afs_writepage(struct page *, struct writeback_control *); 79631143d5dSDavid Howells extern int afs_writepages(struct address_space *, struct writeback_control *); 79731143d5dSDavid Howells extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *); 79850b5551dSAl Viro extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); 79931143d5dSDavid Howells extern int afs_writeback_all(struct afs_vnode *); 80058fed94dSDavid Howells extern int afs_flush(struct file *, fl_owner_t); 80102c24a82SJosef Bacik extern int afs_fsync(struct file *, loff_t, loff_t, int); 80231143d5dSDavid Howells 803d3e3b7eaSDavid Howells /* 804d3e3b7eaSDavid Howells * xattr.c 805d3e3b7eaSDavid Howells */ 806d3e3b7eaSDavid Howells extern const struct xattr_handler *afs_xattr_handlers[]; 807d3e3b7eaSDavid Howells extern ssize_t afs_listxattr(struct dentry *, char *, size_t); 80831143d5dSDavid Howells 80908e0e7c8SDavid Howells /*****************************************************************************/ 81008e0e7c8SDavid Howells /* 81108e0e7c8SDavid Howells * debug tracing 81208e0e7c8SDavid Howells */ 8138e8d7f13SDavid Howells #include <trace/events/afs.h> 8148e8d7f13SDavid Howells 81508e0e7c8SDavid Howells extern unsigned afs_debug; 81608e0e7c8SDavid Howells 81708e0e7c8SDavid Howells #define dbgprintk(FMT,...) \ 818ad16df84SSven Schnelle printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 81908e0e7c8SDavid Howells 820530b6412SHarvey Harrison #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 821530b6412SHarvey Harrison #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 82208e0e7c8SDavid Howells #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 82308e0e7c8SDavid Howells 82408e0e7c8SDavid Howells 82508e0e7c8SDavid Howells #if defined(__KDEBUG) 82608e0e7c8SDavid Howells #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 82708e0e7c8SDavid Howells #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 82808e0e7c8SDavid Howells #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 82908e0e7c8SDavid Howells 83008e0e7c8SDavid Howells #elif defined(CONFIG_AFS_DEBUG) 83108e0e7c8SDavid Howells #define AFS_DEBUG_KENTER 0x01 83208e0e7c8SDavid Howells #define AFS_DEBUG_KLEAVE 0x02 83308e0e7c8SDavid Howells #define AFS_DEBUG_KDEBUG 0x04 83408e0e7c8SDavid Howells 83508e0e7c8SDavid Howells #define _enter(FMT,...) \ 83608e0e7c8SDavid Howells do { \ 83708e0e7c8SDavid Howells if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ 83808e0e7c8SDavid Howells kenter(FMT,##__VA_ARGS__); \ 83908e0e7c8SDavid Howells } while (0) 84008e0e7c8SDavid Howells 84108e0e7c8SDavid Howells #define _leave(FMT,...) \ 84208e0e7c8SDavid Howells do { \ 84308e0e7c8SDavid Howells if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ 84408e0e7c8SDavid Howells kleave(FMT,##__VA_ARGS__); \ 84508e0e7c8SDavid Howells } while (0) 84608e0e7c8SDavid Howells 84708e0e7c8SDavid Howells #define _debug(FMT,...) \ 84808e0e7c8SDavid Howells do { \ 84908e0e7c8SDavid Howells if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ 85008e0e7c8SDavid Howells kdebug(FMT,##__VA_ARGS__); \ 85108e0e7c8SDavid Howells } while (0) 85208e0e7c8SDavid Howells 85308e0e7c8SDavid Howells #else 85412fdff3fSDavid Howells #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 85512fdff3fSDavid Howells #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 85612fdff3fSDavid Howells #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 85708e0e7c8SDavid Howells #endif 85808e0e7c8SDavid Howells 85908e0e7c8SDavid Howells /* 86008e0e7c8SDavid Howells * debug assertion checking 86108e0e7c8SDavid Howells */ 86208e0e7c8SDavid Howells #if 1 // defined(__KDEBUGALL) 86308e0e7c8SDavid Howells 86408e0e7c8SDavid Howells #define ASSERT(X) \ 86508e0e7c8SDavid Howells do { \ 86608e0e7c8SDavid Howells if (unlikely(!(X))) { \ 86708e0e7c8SDavid Howells printk(KERN_ERR "\n"); \ 86808e0e7c8SDavid Howells printk(KERN_ERR "AFS: Assertion failed\n"); \ 86908e0e7c8SDavid Howells BUG(); \ 87008e0e7c8SDavid Howells } \ 87108e0e7c8SDavid Howells } while(0) 87208e0e7c8SDavid Howells 87308e0e7c8SDavid Howells #define ASSERTCMP(X, OP, Y) \ 87408e0e7c8SDavid Howells do { \ 87508e0e7c8SDavid Howells if (unlikely(!((X) OP (Y)))) { \ 87608e0e7c8SDavid Howells printk(KERN_ERR "\n"); \ 87708e0e7c8SDavid Howells printk(KERN_ERR "AFS: Assertion failed\n"); \ 87808e0e7c8SDavid Howells printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 87908e0e7c8SDavid Howells (unsigned long)(X), (unsigned long)(Y)); \ 88008e0e7c8SDavid Howells printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 88108e0e7c8SDavid Howells (unsigned long)(X), (unsigned long)(Y)); \ 88208e0e7c8SDavid Howells BUG(); \ 88308e0e7c8SDavid Howells } \ 88408e0e7c8SDavid Howells } while(0) 88508e0e7c8SDavid Howells 886416351f2SDavid Howells #define ASSERTRANGE(L, OP1, N, OP2, H) \ 887416351f2SDavid Howells do { \ 888416351f2SDavid Howells if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ 889416351f2SDavid Howells printk(KERN_ERR "\n"); \ 890416351f2SDavid Howells printk(KERN_ERR "AFS: Assertion failed\n"); \ 891416351f2SDavid Howells printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ 892416351f2SDavid Howells (unsigned long)(L), (unsigned long)(N), \ 893416351f2SDavid Howells (unsigned long)(H)); \ 894416351f2SDavid Howells printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ 895416351f2SDavid Howells (unsigned long)(L), (unsigned long)(N), \ 896416351f2SDavid Howells (unsigned long)(H)); \ 897416351f2SDavid Howells BUG(); \ 898416351f2SDavid Howells } \ 899416351f2SDavid Howells } while(0) 900416351f2SDavid Howells 90108e0e7c8SDavid Howells #define ASSERTIF(C, X) \ 90208e0e7c8SDavid Howells do { \ 90308e0e7c8SDavid Howells if (unlikely((C) && !(X))) { \ 90408e0e7c8SDavid Howells printk(KERN_ERR "\n"); \ 90508e0e7c8SDavid Howells printk(KERN_ERR "AFS: Assertion failed\n"); \ 90608e0e7c8SDavid Howells BUG(); \ 90708e0e7c8SDavid Howells } \ 90808e0e7c8SDavid Howells } while(0) 90908e0e7c8SDavid Howells 91008e0e7c8SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 91108e0e7c8SDavid Howells do { \ 91208e0e7c8SDavid Howells if (unlikely((C) && !((X) OP (Y)))) { \ 91308e0e7c8SDavid Howells printk(KERN_ERR "\n"); \ 91408e0e7c8SDavid Howells printk(KERN_ERR "AFS: Assertion failed\n"); \ 91508e0e7c8SDavid Howells printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 91608e0e7c8SDavid Howells (unsigned long)(X), (unsigned long)(Y)); \ 91708e0e7c8SDavid Howells printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 91808e0e7c8SDavid Howells (unsigned long)(X), (unsigned long)(Y)); \ 91908e0e7c8SDavid Howells BUG(); \ 92008e0e7c8SDavid Howells } \ 92108e0e7c8SDavid Howells } while(0) 92208e0e7c8SDavid Howells 92308e0e7c8SDavid Howells #else 92408e0e7c8SDavid Howells 92508e0e7c8SDavid Howells #define ASSERT(X) \ 92608e0e7c8SDavid Howells do { \ 92708e0e7c8SDavid Howells } while(0) 92808e0e7c8SDavid Howells 92908e0e7c8SDavid Howells #define ASSERTCMP(X, OP, Y) \ 93008e0e7c8SDavid Howells do { \ 93108e0e7c8SDavid Howells } while(0) 93208e0e7c8SDavid Howells 933416351f2SDavid Howells #define ASSERTRANGE(L, OP1, N, OP2, H) \ 934416351f2SDavid Howells do { \ 935416351f2SDavid Howells } while(0) 936416351f2SDavid Howells 93708e0e7c8SDavid Howells #define ASSERTIF(C, X) \ 93808e0e7c8SDavid Howells do { \ 93908e0e7c8SDavid Howells } while(0) 94008e0e7c8SDavid Howells 94108e0e7c8SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 94208e0e7c8SDavid Howells do { \ 94308e0e7c8SDavid Howells } while(0) 94408e0e7c8SDavid Howells 94508e0e7c8SDavid Howells #endif /* __KDEBUGALL */ 946