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 */ 8408e0e7c8SDavid Howells void *reply; /* reply buffer (first part) */ 8508e0e7c8SDavid Howells void *reply2; /* reply buffer (second part) */ 8608e0e7c8SDavid Howells void *reply3; /* reply buffer (third part) */ 87260a9803SDavid Howells void *reply4; /* reply buffer (fourth part) */ 8831143d5dSDavid Howells pgoff_t first; /* first page in mapping to deal with */ 8931143d5dSDavid Howells pgoff_t last; /* last page in mapping to deal with */ 90d001648eSDavid Howells size_t offset; /* offset into received data store */ 91341f741fSDavid Howells atomic_t usage; 928e8d7f13SDavid Howells enum afs_call_state state; 9308e0e7c8SDavid Howells int error; /* error code */ 94d001648eSDavid Howells u32 abort_code; /* Remote abort ID or 0 */ 9508e0e7c8SDavid Howells unsigned request_size; /* size of request data */ 9608e0e7c8SDavid Howells unsigned reply_max; /* maximum size of reply */ 9731143d5dSDavid Howells unsigned first_offset; /* offset into mapping[first] */ 98bcd89270SMarc Dionne union { 9931143d5dSDavid Howells unsigned last_to; /* amount of mapping[last] */ 100bcd89270SMarc Dionne unsigned count2; /* count used in unmarshalling */ 101bcd89270SMarc Dionne }; 10208e0e7c8SDavid Howells unsigned char unmarshall; /* unmarshalling phase */ 10308e0e7c8SDavid Howells bool incoming; /* T if incoming call */ 10431143d5dSDavid Howells bool send_pages; /* T if data from mapping should be sent */ 105d001648eSDavid Howells bool need_attention; /* T if RxRPC poked us */ 10656ff9c83SDavid Howells bool async; /* T if asynchronous */ 107a68f4a27SDavid Howells bool upgrade; /* T to request service upgrade */ 10808e0e7c8SDavid Howells u16 service_id; /* RxRPC service ID to call */ 10950a2c953SDavid Howells u32 operation_ID; /* operation ID for an incoming call */ 11008e0e7c8SDavid Howells u32 count; /* count for use in unmarshalling */ 11108e0e7c8SDavid Howells __be32 tmp; /* place to extract temporary data */ 11231143d5dSDavid Howells afs_dataversion_t store_version; /* updated version expected from store */ 11308e0e7c8SDavid Howells }; 11408e0e7c8SDavid Howells 11508e0e7c8SDavid Howells struct afs_call_type { 11600d3b7a4SDavid Howells const char *name; 11700d3b7a4SDavid Howells 11808e0e7c8SDavid Howells /* deliver request or reply data to an call 11908e0e7c8SDavid Howells * - returning an error will cause the call to be aborted 12008e0e7c8SDavid Howells */ 121d001648eSDavid Howells int (*deliver)(struct afs_call *call); 12208e0e7c8SDavid Howells 12308e0e7c8SDavid Howells /* map an abort code to an error number */ 12408e0e7c8SDavid Howells int (*abort_to_error)(u32 abort_code); 12508e0e7c8SDavid Howells 12608e0e7c8SDavid Howells /* clean up a call */ 12708e0e7c8SDavid Howells void (*destructor)(struct afs_call *call); 128341f741fSDavid Howells 129341f741fSDavid Howells /* Work function */ 130341f741fSDavid Howells void (*work)(struct work_struct *work); 13108e0e7c8SDavid Howells }; 13208e0e7c8SDavid Howells 13308e0e7c8SDavid Howells /* 134196ee9cdSDavid Howells * Record of an outstanding read operation on a vnode. 135196ee9cdSDavid Howells */ 136196ee9cdSDavid Howells struct afs_read { 137196ee9cdSDavid Howells loff_t pos; /* Where to start reading */ 138e8e581a8SDavid Howells loff_t len; /* How much we're asking for */ 139196ee9cdSDavid Howells loff_t actual_len; /* How much we're actually getting */ 1406a0e3999SDavid Howells loff_t remain; /* Amount remaining */ 141196ee9cdSDavid Howells atomic_t usage; 142196ee9cdSDavid Howells unsigned int index; /* Which page we're reading into */ 143196ee9cdSDavid Howells unsigned int nr_pages; 144196ee9cdSDavid Howells void (*page_done)(struct afs_call *, struct afs_read *); 145196ee9cdSDavid Howells struct page *pages[]; 146196ee9cdSDavid Howells }; 147196ee9cdSDavid Howells 148196ee9cdSDavid Howells /* 14931143d5dSDavid Howells * record of an outstanding writeback on a vnode 15031143d5dSDavid Howells */ 15131143d5dSDavid Howells struct afs_writeback { 15231143d5dSDavid Howells struct list_head link; /* link in vnode->writebacks */ 15331143d5dSDavid Howells struct work_struct writer; /* work item to perform the writeback */ 15431143d5dSDavid Howells struct afs_vnode *vnode; /* vnode to which this write applies */ 15531143d5dSDavid Howells struct key *key; /* owner of this write */ 15631143d5dSDavid Howells wait_queue_head_t waitq; /* completion and ready wait queue */ 15731143d5dSDavid Howells pgoff_t first; /* first page in batch */ 15831143d5dSDavid Howells pgoff_t point; /* last page in current store op */ 15931143d5dSDavid Howells pgoff_t last; /* last page in batch (inclusive) */ 16031143d5dSDavid Howells unsigned offset_first; /* offset into first page of start of write */ 16131143d5dSDavid Howells unsigned to_last; /* offset into last page of end of write */ 16231143d5dSDavid Howells int num_conflicts; /* count of conflicting writes in list */ 16331143d5dSDavid Howells int usage; 16431143d5dSDavid Howells bool conflicts; /* T if has dependent conflicts */ 16531143d5dSDavid Howells enum { 16631143d5dSDavid Howells AFS_WBACK_SYNCING, /* synchronisation being performed */ 16731143d5dSDavid Howells AFS_WBACK_PENDING, /* write pending */ 16831143d5dSDavid Howells AFS_WBACK_CONFLICTING, /* conflicting writes posted */ 16931143d5dSDavid Howells AFS_WBACK_WRITING, /* writing back */ 17031143d5dSDavid Howells AFS_WBACK_COMPLETE /* the writeback record has been unlinked */ 17131143d5dSDavid Howells } state __attribute__((packed)); 17231143d5dSDavid Howells }; 17331143d5dSDavid Howells 17431143d5dSDavid Howells /* 17508e0e7c8SDavid Howells * AFS superblock private data 17608e0e7c8SDavid Howells * - there's one superblock per volume 17708e0e7c8SDavid Howells */ 17808e0e7c8SDavid Howells struct afs_super_info { 179f044c884SDavid Howells struct afs_net *net; /* Network namespace */ 18049566f6fSDavid Howells struct afs_cell *cell; /* The cell in which the volume resides */ 18108e0e7c8SDavid Howells struct afs_volume *volume; /* volume record */ 18208e0e7c8SDavid Howells char rwparent; /* T if parent is R/W AFS volume */ 18308e0e7c8SDavid Howells }; 18408e0e7c8SDavid Howells 18508e0e7c8SDavid Howells static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) 18608e0e7c8SDavid Howells { 18708e0e7c8SDavid Howells return sb->s_fs_info; 18808e0e7c8SDavid Howells } 18908e0e7c8SDavid Howells 19008e0e7c8SDavid Howells extern struct file_system_type afs_fs_type; 19108e0e7c8SDavid Howells 19208e0e7c8SDavid Howells /* 193f044c884SDavid Howells * AFS network namespace record. 194f044c884SDavid Howells */ 195f044c884SDavid Howells struct afs_net { 196f044c884SDavid Howells struct afs_uuid uuid; 197f044c884SDavid Howells bool live; /* F if this namespace is being removed */ 198f044c884SDavid Howells 199f044c884SDavid Howells /* AF_RXRPC I/O stuff */ 200f044c884SDavid Howells struct socket *socket; 201f044c884SDavid Howells struct afs_call *spare_incoming_call; 202f044c884SDavid Howells struct work_struct charge_preallocation_work; 203f044c884SDavid Howells struct mutex socket_mutex; 204f044c884SDavid Howells atomic_t nr_outstanding_calls; 205f044c884SDavid Howells atomic_t nr_superblocks; 206f044c884SDavid Howells 207f044c884SDavid Howells /* Cell database */ 208f044c884SDavid Howells struct list_head cells; 209f044c884SDavid Howells struct afs_cell *ws_cell; 210f044c884SDavid Howells rwlock_t cells_lock; 211f044c884SDavid Howells struct rw_semaphore cells_sem; 212f044c884SDavid Howells wait_queue_head_t cells_freeable_wq; 213f044c884SDavid Howells 214f044c884SDavid Howells struct rw_semaphore proc_cells_sem; 215f044c884SDavid Howells struct list_head proc_cells; 216f044c884SDavid Howells 217f044c884SDavid Howells /* Volume location database */ 218f044c884SDavid Howells struct list_head vl_updates; /* VL records in need-update order */ 219f044c884SDavid Howells struct list_head vl_graveyard; /* Inactive VL records */ 220f044c884SDavid Howells struct delayed_work vl_reaper; 221f044c884SDavid Howells struct delayed_work vl_updater; 222f044c884SDavid Howells spinlock_t vl_updates_lock; 223f044c884SDavid Howells spinlock_t vl_graveyard_lock; 224f044c884SDavid Howells 225f044c884SDavid Howells /* File locking renewal management */ 226f044c884SDavid Howells struct mutex lock_manager_mutex; 227f044c884SDavid Howells 228f044c884SDavid Howells /* Server database */ 229f044c884SDavid Howells struct rb_root servers; /* Active servers */ 230f044c884SDavid Howells rwlock_t servers_lock; 231f044c884SDavid Howells struct list_head server_graveyard; /* Inactive server LRU list */ 232f044c884SDavid Howells spinlock_t server_graveyard_lock; 23359fa1c4aSDavid Howells struct timer_list server_timer; 23459fa1c4aSDavid Howells struct work_struct server_reaper; 23559fa1c4aSDavid Howells atomic_t servers_outstanding; 236f044c884SDavid Howells 237f044c884SDavid Howells /* Misc */ 238f044c884SDavid Howells struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */ 239f044c884SDavid Howells }; 240f044c884SDavid Howells 241f044c884SDavid Howells extern struct afs_net __afs_net;// Dummy AFS network namespace; TODO: replace with real netns 242f044c884SDavid Howells 243f044c884SDavid Howells /* 24408e0e7c8SDavid Howells * AFS cell record 24508e0e7c8SDavid Howells */ 24608e0e7c8SDavid Howells struct afs_cell { 24708e0e7c8SDavid Howells atomic_t usage; 24808e0e7c8SDavid Howells struct list_head link; /* main cell list link */ 249f044c884SDavid Howells struct afs_net *net; /* The network namespace */ 25000d3b7a4SDavid Howells struct key *anonymous_key; /* anonymous user key for this cell */ 25108e0e7c8SDavid Howells struct list_head proc_link; /* /proc cell list link */ 2529b3f26c9SDavid Howells #ifdef CONFIG_AFS_FSCACHE 2539b3f26c9SDavid Howells struct fscache_cookie *cache; /* caching cookie */ 2541da177e4SLinus Torvalds #endif 2551da177e4SLinus Torvalds 25608e0e7c8SDavid Howells /* server record management */ 25708e0e7c8SDavid Howells rwlock_t servers_lock; /* active server list lock */ 25808e0e7c8SDavid Howells struct list_head servers; /* active server list */ 2591da177e4SLinus Torvalds 26008e0e7c8SDavid Howells /* volume location record management */ 26108e0e7c8SDavid Howells struct rw_semaphore vl_sem; /* volume management serialisation semaphore */ 26208e0e7c8SDavid Howells struct list_head vl_list; /* cell's active VL record list */ 26308e0e7c8SDavid Howells spinlock_t vl_lock; /* vl_list lock */ 26408e0e7c8SDavid Howells unsigned short vl_naddrs; /* number of VL servers in addr list */ 26508e0e7c8SDavid Howells unsigned short vl_curr_svix; /* current server index */ 2664d9df986SDavid Howells struct sockaddr_rxrpc vl_addrs[AFS_CELL_MAX_ADDRS]; /* cell VL server addresses */ 26708e0e7c8SDavid Howells 26808e0e7c8SDavid Howells char name[0]; /* cell name - must go last */ 26908e0e7c8SDavid Howells }; 27008e0e7c8SDavid Howells 27108e0e7c8SDavid Howells /* 27208e0e7c8SDavid Howells * entry in the cached volume location catalogue 27308e0e7c8SDavid Howells */ 27408e0e7c8SDavid Howells struct afs_cache_vlocation { 27500d3b7a4SDavid Howells /* volume name (lowercase, padded with NULs) */ 27600d3b7a4SDavid Howells uint8_t name[AFS_MAXVOLNAME + 1]; 27700d3b7a4SDavid Howells 27808e0e7c8SDavid Howells uint8_t nservers; /* number of entries used in servers[] */ 27908e0e7c8SDavid Howells uint8_t vidmask; /* voltype mask for vid[] */ 28008e0e7c8SDavid Howells uint8_t srvtmask[8]; /* voltype masks for servers[] */ 28108e0e7c8SDavid Howells #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ 28208e0e7c8SDavid Howells #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ 28308e0e7c8SDavid Howells #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ 28408e0e7c8SDavid Howells 28508e0e7c8SDavid Howells afs_volid_t vid[3]; /* volume IDs for R/W, R/O and Bak volumes */ 2864d9df986SDavid Howells struct sockaddr_rxrpc servers[8]; /* fileserver addresses */ 28708e0e7c8SDavid Howells time_t rtime; /* last retrieval time */ 28808e0e7c8SDavid Howells }; 28908e0e7c8SDavid Howells 29008e0e7c8SDavid Howells /* 29108e0e7c8SDavid Howells * AFS volume location record 29208e0e7c8SDavid Howells */ 29308e0e7c8SDavid Howells struct afs_vlocation { 29408e0e7c8SDavid Howells atomic_t usage; 2958a79790bSTina Ruchandani time64_t time_of_death; /* time at which put reduced usage to 0 */ 29608e0e7c8SDavid Howells struct list_head link; /* link in cell volume location list */ 29708e0e7c8SDavid Howells struct list_head grave; /* link in master graveyard list */ 29808e0e7c8SDavid Howells struct list_head update; /* link in master update list */ 29908e0e7c8SDavid Howells struct afs_cell *cell; /* cell to which volume belongs */ 30008e0e7c8SDavid Howells struct afs_cache_vlocation vldb; /* volume information DB record */ 30108e0e7c8SDavid Howells struct afs_volume *vols[3]; /* volume access record pointer (index by type) */ 30208e0e7c8SDavid Howells wait_queue_head_t waitq; /* status change waitqueue */ 3038a79790bSTina Ruchandani time64_t update_at; /* time at which record should be updated */ 30439bf0949SDavid S. Miller spinlock_t lock; /* access lock */ 30508e0e7c8SDavid Howells afs_vlocation_state_t state; /* volume location state */ 30608e0e7c8SDavid Howells unsigned short upd_rej_cnt; /* ENOMEDIUM count during update */ 30708e0e7c8SDavid Howells unsigned short upd_busy_cnt; /* EBUSY count during update */ 30808e0e7c8SDavid Howells bool valid; /* T if valid */ 30908e0e7c8SDavid Howells }; 31008e0e7c8SDavid Howells 31108e0e7c8SDavid Howells /* 31208e0e7c8SDavid Howells * AFS fileserver record 31308e0e7c8SDavid Howells */ 31408e0e7c8SDavid Howells struct afs_server { 31508e0e7c8SDavid Howells atomic_t usage; 3168a79790bSTina Ruchandani time64_t time_of_death; /* time at which put reduced usage to 0 */ 3174d9df986SDavid Howells struct sockaddr_rxrpc addr; /* server address */ 3189ed900b1SDavid Howells struct afs_net *net; /* Network namespace in which the server resides */ 31908e0e7c8SDavid Howells struct afs_cell *cell; /* cell in which server resides */ 32008e0e7c8SDavid Howells struct list_head link; /* link in cell's server list */ 32108e0e7c8SDavid Howells struct list_head grave; /* link in master graveyard list */ 32208e0e7c8SDavid Howells struct rb_node master_rb; /* link in master by-addr tree */ 32308e0e7c8SDavid Howells struct rw_semaphore sem; /* access lock */ 32408e0e7c8SDavid Howells 32508e0e7c8SDavid Howells /* file service access */ 32608e0e7c8SDavid Howells struct rb_root fs_vnodes; /* vnodes backed by this server (ordered by FID) */ 32708e0e7c8SDavid Howells unsigned long fs_act_jif; /* time at which last activity occurred */ 32808e0e7c8SDavid Howells unsigned long fs_dead_jif; /* time at which no longer to be considered dead */ 32908e0e7c8SDavid Howells spinlock_t fs_lock; /* access lock */ 33008e0e7c8SDavid Howells int fs_state; /* 0 or reason FS currently marked dead (-errno) */ 33108e0e7c8SDavid Howells 33208e0e7c8SDavid Howells /* callback promise management */ 33308e0e7c8SDavid Howells struct rb_root cb_promises; /* vnode expiration list (ordered earliest first) */ 33408e0e7c8SDavid Howells struct delayed_work cb_updater; /* callback updater */ 33508e0e7c8SDavid Howells struct delayed_work cb_break_work; /* collected break dispatcher */ 33608e0e7c8SDavid Howells wait_queue_head_t cb_break_waitq; /* space available in cb_break waitqueue */ 33708e0e7c8SDavid Howells spinlock_t cb_lock; /* access lock */ 33808e0e7c8SDavid Howells struct afs_callback cb_break[64]; /* ring of callbacks awaiting breaking */ 33908e0e7c8SDavid Howells atomic_t cb_break_n; /* number of pending breaks */ 34008e0e7c8SDavid Howells u8 cb_break_head; /* head of callback breaking ring */ 34108e0e7c8SDavid Howells u8 cb_break_tail; /* tail of callback breaking ring */ 34208e0e7c8SDavid Howells }; 34308e0e7c8SDavid Howells 34408e0e7c8SDavid Howells /* 34508e0e7c8SDavid Howells * AFS volume access record 34608e0e7c8SDavid Howells */ 34708e0e7c8SDavid Howells struct afs_volume { 34808e0e7c8SDavid Howells atomic_t usage; 34908e0e7c8SDavid Howells struct afs_cell *cell; /* cell to which belongs (unrefd ptr) */ 35008e0e7c8SDavid Howells struct afs_vlocation *vlocation; /* volume location */ 3519b3f26c9SDavid Howells #ifdef CONFIG_AFS_FSCACHE 3529b3f26c9SDavid Howells struct fscache_cookie *cache; /* caching cookie */ 35308e0e7c8SDavid Howells #endif 35408e0e7c8SDavid Howells afs_volid_t vid; /* volume ID */ 35508e0e7c8SDavid Howells afs_voltype_t type; /* type of volume */ 35608e0e7c8SDavid Howells char type_force; /* force volume type (suppress R/O -> R/W) */ 35708e0e7c8SDavid Howells unsigned short nservers; /* number of server slots filled */ 35808e0e7c8SDavid Howells unsigned short rjservers; /* number of servers discarded due to -ENOMEDIUM */ 35908e0e7c8SDavid Howells struct afs_server *servers[8]; /* servers on which volume resides (ordered) */ 36008e0e7c8SDavid Howells struct rw_semaphore server_sem; /* lock for accessing current server */ 36108e0e7c8SDavid Howells }; 36208e0e7c8SDavid Howells 36308e0e7c8SDavid Howells /* 36408e0e7c8SDavid Howells * vnode catalogue entry 36508e0e7c8SDavid Howells */ 36608e0e7c8SDavid Howells struct afs_cache_vnode { 36708e0e7c8SDavid Howells afs_vnodeid_t vnode_id; /* vnode ID */ 36808e0e7c8SDavid Howells unsigned vnode_unique; /* vnode ID uniquifier */ 36908e0e7c8SDavid Howells afs_dataversion_t data_version; /* data version */ 37008e0e7c8SDavid Howells }; 37108e0e7c8SDavid Howells 37208e0e7c8SDavid Howells /* 37308e0e7c8SDavid Howells * AFS inode private data 37408e0e7c8SDavid Howells */ 37508e0e7c8SDavid Howells struct afs_vnode { 37608e0e7c8SDavid Howells struct inode vfs_inode; /* the VFS's inode record */ 37708e0e7c8SDavid Howells 37808e0e7c8SDavid Howells struct afs_volume *volume; /* volume on which vnode resides */ 37908e0e7c8SDavid Howells struct afs_server *server; /* server currently supplying this file */ 38008e0e7c8SDavid Howells struct afs_fid fid; /* the file identifier for this inode */ 38108e0e7c8SDavid Howells struct afs_file_status status; /* AFS status info for this file */ 3829b3f26c9SDavid Howells #ifdef CONFIG_AFS_FSCACHE 3839b3f26c9SDavid Howells struct fscache_cookie *cache; /* caching cookie */ 38408e0e7c8SDavid Howells #endif 38500d3b7a4SDavid Howells struct afs_permits *permits; /* cache of permits so far obtained */ 38600d3b7a4SDavid Howells struct mutex permits_lock; /* lock for altering permits list */ 387260a9803SDavid Howells struct mutex validate_lock; /* lock for validating this vnode */ 38808e0e7c8SDavid Howells wait_queue_head_t update_waitq; /* status fetch waitqueue */ 389260a9803SDavid Howells int update_cnt; /* number of outstanding ops that will update the 39008e0e7c8SDavid Howells * status */ 39131143d5dSDavid Howells spinlock_t writeback_lock; /* lock for writebacks */ 39208e0e7c8SDavid Howells spinlock_t lock; /* waitqueue/flags lock */ 39308e0e7c8SDavid Howells unsigned long flags; 39408e0e7c8SDavid Howells #define AFS_VNODE_CB_BROKEN 0 /* set if vnode's callback was broken */ 395260a9803SDavid Howells #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ 39608e0e7c8SDavid Howells #define AFS_VNODE_MODIFIED 2 /* set if vnode's data modified */ 39708e0e7c8SDavid Howells #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ 39808e0e7c8SDavid Howells #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ 39908e0e7c8SDavid Howells #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ 400e8d6c554SDavid Howells #define AFS_VNODE_LOCKING 6 /* set if waiting for lock on vnode */ 401e8d6c554SDavid Howells #define AFS_VNODE_READLOCKED 7 /* set if vnode is read-locked on the server */ 402e8d6c554SDavid Howells #define AFS_VNODE_WRITELOCKED 8 /* set if vnode is write-locked on the server */ 403e8d6c554SDavid Howells #define AFS_VNODE_UNLOCKING 9 /* set if vnode is being unlocked on the server */ 404bec5eb61Swanglei #define AFS_VNODE_AUTOCELL 10 /* set if Vnode is an auto mount point */ 405bec5eb61Swanglei #define AFS_VNODE_PSEUDODIR 11 /* set if Vnode is a pseudo directory */ 40608e0e7c8SDavid Howells 40700d3b7a4SDavid Howells long acl_order; /* ACL check count (callback break count) */ 40800d3b7a4SDavid Howells 40931143d5dSDavid Howells struct list_head writebacks; /* alterations in pagecache that need writing */ 410e8d6c554SDavid Howells struct list_head pending_locks; /* locks waiting to be granted */ 411e8d6c554SDavid Howells struct list_head granted_locks; /* locks granted on this file */ 412e8d6c554SDavid Howells struct delayed_work lock_work; /* work to be done in locking */ 413e8d6c554SDavid Howells struct key *unlock_key; /* key to be used in unlocking */ 41431143d5dSDavid Howells 41508e0e7c8SDavid Howells /* outstanding callback notification on this file */ 41608e0e7c8SDavid Howells struct rb_node server_rb; /* link in server->fs_vnodes */ 41708e0e7c8SDavid Howells struct rb_node cb_promise; /* link in server->cb_promises */ 41808e0e7c8SDavid Howells struct work_struct cb_broken_work; /* work to be done on callback break */ 41956e71431STina Ruchandani time64_t cb_expires; /* time at which callback expires */ 42056e71431STina Ruchandani time64_t cb_expires_at; /* time used to order cb_promise */ 42108e0e7c8SDavid Howells unsigned cb_version; /* callback version */ 42208e0e7c8SDavid Howells unsigned cb_expiry; /* callback expiry time */ 42308e0e7c8SDavid Howells afs_callback_type_t cb_type; /* type of callback */ 42408e0e7c8SDavid Howells bool cb_promised; /* true if promise still holds */ 42508e0e7c8SDavid Howells }; 42608e0e7c8SDavid Howells 42700d3b7a4SDavid Howells /* 42800d3b7a4SDavid Howells * cached security record for one user's attempt to access a vnode 42900d3b7a4SDavid Howells */ 43000d3b7a4SDavid Howells struct afs_permit { 43100d3b7a4SDavid Howells struct key *key; /* RxRPC ticket holding a security context */ 43200d3b7a4SDavid Howells afs_access_t access_mask; /* access mask for this key */ 43300d3b7a4SDavid Howells }; 43400d3b7a4SDavid Howells 43500d3b7a4SDavid Howells /* 43600d3b7a4SDavid Howells * cache of security records from attempts to access a vnode 43700d3b7a4SDavid Howells */ 43800d3b7a4SDavid Howells struct afs_permits { 43900d3b7a4SDavid Howells struct rcu_head rcu; /* disposal procedure */ 44000d3b7a4SDavid Howells int count; /* number of records */ 44100d3b7a4SDavid Howells struct afs_permit permits[0]; /* the permits so far examined */ 44200d3b7a4SDavid Howells }; 44300d3b7a4SDavid Howells 444b908fe6bSDavid Howells /* 445b908fe6bSDavid Howells * record of one of a system's set of network interfaces 446b908fe6bSDavid Howells */ 447b908fe6bSDavid Howells struct afs_interface { 448b908fe6bSDavid Howells struct in_addr address; /* IPv4 address bound to interface */ 449b908fe6bSDavid Howells struct in_addr netmask; /* netmask applied to address */ 450b908fe6bSDavid Howells unsigned mtu; /* MTU of interface */ 451b908fe6bSDavid Howells }; 452b908fe6bSDavid Howells 45308e0e7c8SDavid Howells /*****************************************************************************/ 45408e0e7c8SDavid Howells /* 4559b3f26c9SDavid Howells * cache.c 4569b3f26c9SDavid Howells */ 4579b3f26c9SDavid Howells #ifdef CONFIG_AFS_FSCACHE 4589b3f26c9SDavid Howells extern struct fscache_netfs afs_cache_netfs; 4599b3f26c9SDavid Howells extern struct fscache_cookie_def afs_cell_cache_index_def; 4609b3f26c9SDavid Howells extern struct fscache_cookie_def afs_volume_cache_index_def; 4619b3f26c9SDavid Howells extern struct fscache_cookie_def afs_vnode_cache_index_def; 4629b3f26c9SDavid Howells #else 4639b3f26c9SDavid Howells #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL) 4649b3f26c9SDavid Howells #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL) 4659b3f26c9SDavid Howells #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL) 4669b3f26c9SDavid Howells #endif 4679b3f26c9SDavid Howells 4689b3f26c9SDavid Howells /* 46908e0e7c8SDavid Howells * callback.c 47008e0e7c8SDavid Howells */ 471f044c884SDavid Howells extern struct workqueue_struct *afs_callback_update_worker; 472f044c884SDavid Howells 47308e0e7c8SDavid Howells extern void afs_init_callback_state(struct afs_server *); 47408e0e7c8SDavid Howells extern void afs_broken_callback_work(struct work_struct *); 47508e0e7c8SDavid Howells extern void afs_break_callbacks(struct afs_server *, size_t, 47608e0e7c8SDavid Howells struct afs_callback[]); 477260a9803SDavid Howells extern void afs_discard_callback_on_delete(struct afs_vnode *); 47808e0e7c8SDavid Howells extern void afs_give_up_callback(struct afs_vnode *); 47908e0e7c8SDavid Howells extern void afs_dispatch_give_up_callbacks(struct work_struct *); 48008e0e7c8SDavid Howells extern void afs_flush_callback_breaks(struct afs_server *); 4811da177e4SLinus Torvalds 4821da177e4SLinus Torvalds /* 4831da177e4SLinus Torvalds * cell.c 4841da177e4SLinus Torvalds */ 48549566f6fSDavid Howells static inline struct afs_cell *afs_get_cell(struct afs_cell *cell) 48649566f6fSDavid Howells { 48749566f6fSDavid Howells if (cell) 48849566f6fSDavid Howells atomic_inc(&cell->usage); 48949566f6fSDavid Howells return cell; 49049566f6fSDavid Howells } 491f044c884SDavid Howells extern int afs_cell_init(struct afs_net *, char *); 492f044c884SDavid Howells extern struct afs_cell *afs_cell_create(struct afs_net *, const char *, unsigned, char *, bool); 493f044c884SDavid Howells extern struct afs_cell *afs_cell_lookup(struct afs_net *, const char *, unsigned, bool); 49408e0e7c8SDavid Howells extern struct afs_cell *afs_grab_cell(struct afs_cell *); 4959ed900b1SDavid Howells extern void afs_put_cell(struct afs_net *, struct afs_cell *); 496f044c884SDavid Howells extern void __net_exit afs_cell_purge(struct afs_net *); 49708e0e7c8SDavid Howells 49808e0e7c8SDavid Howells /* 49908e0e7c8SDavid Howells * cmservice.c 50008e0e7c8SDavid Howells */ 50108e0e7c8SDavid Howells extern bool afs_cm_incoming_call(struct afs_call *); 50208e0e7c8SDavid Howells 5031da177e4SLinus Torvalds /* 5041da177e4SLinus Torvalds * dir.c 5051da177e4SLinus Torvalds */ 506754661f1SArjan van de Ven extern const struct inode_operations afs_dir_inode_operations; 507d61dcce2SAl Viro extern const struct dentry_operations afs_fs_dentry_operations; 5084b6f5d20SArjan van de Ven extern const struct file_operations afs_dir_file_operations; 5091da177e4SLinus Torvalds 5101da177e4SLinus Torvalds /* 5111da177e4SLinus Torvalds * file.c 5121da177e4SLinus Torvalds */ 513f5e54d6eSChristoph Hellwig extern const struct address_space_operations afs_fs_aops; 514754661f1SArjan van de Ven extern const struct inode_operations afs_file_inode_operations; 51500d3b7a4SDavid Howells extern const struct file_operations afs_file_operations; 51600d3b7a4SDavid Howells 51700d3b7a4SDavid Howells extern int afs_open(struct inode *, struct file *); 51800d3b7a4SDavid Howells extern int afs_release(struct inode *, struct file *); 519f6d335c0SAl Viro extern int afs_page_filler(void *, struct page *); 520196ee9cdSDavid Howells extern void afs_put_read(struct afs_read *); 5211da177e4SLinus Torvalds 5221da177e4SLinus Torvalds /* 523e8d6c554SDavid Howells * flock.c 524e8d6c554SDavid Howells */ 525f044c884SDavid Howells extern struct workqueue_struct *afs_lock_manager; 526f044c884SDavid Howells 527e8d6c554SDavid Howells extern void afs_lock_work(struct work_struct *); 528e8d6c554SDavid Howells extern void afs_lock_may_be_available(struct afs_vnode *); 529e8d6c554SDavid Howells extern int afs_lock(struct file *, int, struct file_lock *); 530e8d6c554SDavid Howells extern int afs_flock(struct file *, int, struct file_lock *); 531e8d6c554SDavid Howells 532e8d6c554SDavid Howells /* 53308e0e7c8SDavid Howells * fsclient.c 53408e0e7c8SDavid Howells */ 53500d3b7a4SDavid Howells extern int afs_fs_fetch_file_status(struct afs_server *, struct key *, 53600d3b7a4SDavid Howells struct afs_vnode *, struct afs_volsync *, 53756ff9c83SDavid Howells bool); 538f044c884SDavid Howells extern int afs_fs_give_up_callbacks(struct afs_net *, struct afs_server *, bool); 53900d3b7a4SDavid Howells extern int afs_fs_fetch_data(struct afs_server *, struct key *, 54056ff9c83SDavid Howells struct afs_vnode *, struct afs_read *, bool); 541260a9803SDavid Howells extern int afs_fs_create(struct afs_server *, struct key *, 542260a9803SDavid Howells struct afs_vnode *, const char *, umode_t, 543260a9803SDavid Howells struct afs_fid *, struct afs_file_status *, 54456ff9c83SDavid Howells struct afs_callback *, bool); 545260a9803SDavid Howells extern int afs_fs_remove(struct afs_server *, struct key *, 54656ff9c83SDavid Howells struct afs_vnode *, const char *, bool, bool); 547260a9803SDavid Howells extern int afs_fs_link(struct afs_server *, struct key *, struct afs_vnode *, 54856ff9c83SDavid Howells struct afs_vnode *, const char *, bool); 549260a9803SDavid Howells extern int afs_fs_symlink(struct afs_server *, struct key *, 550260a9803SDavid Howells struct afs_vnode *, const char *, const char *, 55156ff9c83SDavid Howells struct afs_fid *, struct afs_file_status *, bool); 552260a9803SDavid Howells extern int afs_fs_rename(struct afs_server *, struct key *, 553260a9803SDavid Howells struct afs_vnode *, const char *, 55456ff9c83SDavid Howells struct afs_vnode *, const char *, bool); 55531143d5dSDavid Howells extern int afs_fs_store_data(struct afs_server *, struct afs_writeback *, 55656ff9c83SDavid Howells pgoff_t, pgoff_t, unsigned, unsigned, bool); 55731143d5dSDavid Howells extern int afs_fs_setattr(struct afs_server *, struct key *, 55856ff9c83SDavid Howells struct afs_vnode *, struct iattr *, bool); 55945222b9eSDavid Howells extern int afs_fs_get_volume_status(struct afs_server *, struct key *, 56045222b9eSDavid Howells struct afs_vnode *, 56156ff9c83SDavid Howells struct afs_volume_status *, bool); 562e8d6c554SDavid Howells extern int afs_fs_set_lock(struct afs_server *, struct key *, 56356ff9c83SDavid Howells struct afs_vnode *, afs_lock_type_t, bool); 564e8d6c554SDavid Howells extern int afs_fs_extend_lock(struct afs_server *, struct key *, 56556ff9c83SDavid Howells struct afs_vnode *, bool); 566e8d6c554SDavid Howells extern int afs_fs_release_lock(struct afs_server *, struct key *, 56756ff9c83SDavid Howells struct afs_vnode *, bool); 56808e0e7c8SDavid Howells 56908e0e7c8SDavid Howells /* 5701da177e4SLinus Torvalds * inode.c 5711da177e4SLinus Torvalds */ 572bec5eb61Swanglei extern struct inode *afs_iget_autocell(struct inode *, const char *, int, 573bec5eb61Swanglei struct key *); 57400d3b7a4SDavid Howells extern struct inode *afs_iget(struct super_block *, struct key *, 575260a9803SDavid Howells struct afs_fid *, struct afs_file_status *, 576260a9803SDavid Howells struct afs_callback *); 577416351f2SDavid Howells extern void afs_zap_data(struct afs_vnode *); 578260a9803SDavid Howells extern int afs_validate(struct afs_vnode *, struct key *); 579a528d35eSDavid Howells extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int); 58031143d5dSDavid Howells extern int afs_setattr(struct dentry *, struct iattr *); 581b57922d9SAl Viro extern void afs_evict_inode(struct inode *); 582bec5eb61Swanglei extern int afs_drop_inode(struct inode *); 5831da177e4SLinus Torvalds 5841da177e4SLinus Torvalds /* 5851da177e4SLinus Torvalds * main.c 5861da177e4SLinus Torvalds */ 5870ad53eeeSTejun Heo extern struct workqueue_struct *afs_wq; 588f044c884SDavid Howells 589f044c884SDavid Howells static inline struct afs_net *afs_d2net(struct dentry *dentry) 590f044c884SDavid Howells { 591f044c884SDavid Howells return &__afs_net; 592f044c884SDavid Howells } 593f044c884SDavid Howells 594f044c884SDavid Howells static inline struct afs_net *afs_i2net(struct inode *inode) 595f044c884SDavid Howells { 596f044c884SDavid Howells return &__afs_net; 597f044c884SDavid Howells } 598f044c884SDavid Howells 599f044c884SDavid Howells static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) 600f044c884SDavid Howells { 601f044c884SDavid Howells return &__afs_net; 602f044c884SDavid Howells } 603f044c884SDavid Howells 604f044c884SDavid Howells static inline struct afs_net *afs_sock2net(struct sock *sk) 605f044c884SDavid Howells { 606f044c884SDavid Howells return &__afs_net; 607f044c884SDavid Howells } 608f044c884SDavid Howells 609f044c884SDavid Howells static inline struct afs_net *afs_get_net(struct afs_net *net) 610f044c884SDavid Howells { 611f044c884SDavid Howells return net; 612f044c884SDavid Howells } 613f044c884SDavid Howells 614f044c884SDavid Howells static inline void afs_put_net(struct afs_net *net) 615f044c884SDavid Howells { 616f044c884SDavid Howells } 6171da177e4SLinus Torvalds 6181da177e4SLinus Torvalds /* 61908e0e7c8SDavid Howells * misc.c 62008e0e7c8SDavid Howells */ 62108e0e7c8SDavid Howells extern int afs_abort_to_error(u32); 62208e0e7c8SDavid Howells 62308e0e7c8SDavid Howells /* 6241da177e4SLinus Torvalds * mntpt.c 6251da177e4SLinus Torvalds */ 626754661f1SArjan van de Ven extern const struct inode_operations afs_mntpt_inode_operations; 627bec5eb61Swanglei extern const struct inode_operations afs_autocell_inode_operations; 6284b6f5d20SArjan van de Ven extern const struct file_operations afs_mntpt_file_operations; 6291da177e4SLinus Torvalds 630d18610b0SDavid Howells extern struct vfsmount *afs_d_automount(struct path *); 63108e0e7c8SDavid Howells extern void afs_mntpt_kill_timer(void); 6321da177e4SLinus Torvalds 6331da177e4SLinus Torvalds /* 634b4db2b35SArnd Bergmann * netdevices.c 635b4db2b35SArnd Bergmann */ 636b4db2b35SArnd Bergmann extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool); 637b4db2b35SArnd Bergmann 638b4db2b35SArnd Bergmann /* 6391da177e4SLinus Torvalds * proc.c 6401da177e4SLinus Torvalds */ 641f044c884SDavid Howells extern int __net_init afs_proc_init(struct afs_net *); 642f044c884SDavid Howells extern void __net_exit afs_proc_cleanup(struct afs_net *); 643f044c884SDavid Howells extern int afs_proc_cell_setup(struct afs_net *, struct afs_cell *); 644f044c884SDavid Howells extern void afs_proc_cell_remove(struct afs_net *, struct afs_cell *); 6451da177e4SLinus Torvalds 64608e0e7c8SDavid Howells /* 64708e0e7c8SDavid Howells * rxrpc.c 64808e0e7c8SDavid Howells */ 649f044c884SDavid Howells extern struct workqueue_struct *afs_async_calls; 6508324f0bcSDavid Howells 651f044c884SDavid Howells extern int __net_init afs_open_socket(struct afs_net *); 652f044c884SDavid Howells extern void __net_exit afs_close_socket(struct afs_net *); 653f044c884SDavid Howells extern void afs_charge_preallocation(struct work_struct *); 654341f741fSDavid Howells extern void afs_put_call(struct afs_call *); 655341f741fSDavid Howells extern int afs_queue_call_work(struct afs_call *); 6564d9df986SDavid Howells extern int afs_make_call(struct sockaddr_rxrpc *, struct afs_call *, gfp_t, bool); 657f044c884SDavid Howells extern struct afs_call *afs_alloc_flat_call(struct afs_net *, 658f044c884SDavid Howells const struct afs_call_type *, 65908e0e7c8SDavid Howells size_t, size_t); 66008e0e7c8SDavid Howells extern void afs_flat_call_destructor(struct afs_call *); 66108e0e7c8SDavid Howells extern void afs_send_empty_reply(struct afs_call *); 662b908fe6bSDavid Howells extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); 663d001648eSDavid Howells extern int afs_extract_data(struct afs_call *, void *, size_t, bool); 66408e0e7c8SDavid Howells 665d001648eSDavid Howells static inline int afs_transfer_reply(struct afs_call *call) 666372ee163SDavid Howells { 667d001648eSDavid Howells return afs_extract_data(call, call->buffer, call->reply_max, false); 668372ee163SDavid Howells } 669372ee163SDavid Howells 67008e0e7c8SDavid Howells /* 67100d3b7a4SDavid Howells * security.c 67200d3b7a4SDavid Howells */ 67300d3b7a4SDavid Howells extern void afs_clear_permits(struct afs_vnode *); 67400d3b7a4SDavid Howells extern void afs_cache_permit(struct afs_vnode *, struct key *, long); 675416351f2SDavid Howells extern void afs_zap_permits(struct rcu_head *); 67600d3b7a4SDavid Howells extern struct key *afs_request_key(struct afs_cell *); 67710556cb2SAl Viro extern int afs_permission(struct inode *, int); 67800d3b7a4SDavid Howells 67900d3b7a4SDavid Howells /* 68008e0e7c8SDavid Howells * server.c 68108e0e7c8SDavid Howells */ 68208e0e7c8SDavid Howells extern spinlock_t afs_server_peer_lock; 68308e0e7c8SDavid Howells 684260a9803SDavid Howells #define afs_get_server(S) \ 685260a9803SDavid Howells do { \ 686260a9803SDavid Howells _debug("GET SERVER %d", atomic_read(&(S)->usage)); \ 687260a9803SDavid Howells atomic_inc(&(S)->usage); \ 688260a9803SDavid Howells } while(0) 68908e0e7c8SDavid Howells 69059fa1c4aSDavid Howells extern void afs_server_timer(struct timer_list *); 69108e0e7c8SDavid Howells extern struct afs_server *afs_lookup_server(struct afs_cell *, 6924d9df986SDavid Howells struct sockaddr_rxrpc *); 693f044c884SDavid Howells extern struct afs_server *afs_find_server(struct afs_net *, 694f044c884SDavid Howells const struct sockaddr_rxrpc *); 6959ed900b1SDavid Howells extern void afs_put_server(struct afs_net *, struct afs_server *); 696f044c884SDavid Howells extern void afs_reap_server(struct work_struct *); 697f044c884SDavid Howells extern void __net_exit afs_purge_servers(struct afs_net *); 69808e0e7c8SDavid Howells 69908e0e7c8SDavid Howells /* 70000d3b7a4SDavid Howells * super.c 70100d3b7a4SDavid Howells */ 702f044c884SDavid Howells extern int __init afs_fs_init(void); 703f044c884SDavid Howells extern void __exit afs_fs_exit(void); 70400d3b7a4SDavid Howells 70500d3b7a4SDavid Howells /* 70608e0e7c8SDavid Howells * vlclient.c 70708e0e7c8SDavid Howells */ 708f044c884SDavid Howells extern int afs_vl_get_entry_by_name(struct afs_net *, 7094d9df986SDavid Howells struct sockaddr_rxrpc *, struct key *, 71000d3b7a4SDavid Howells const char *, struct afs_cache_vlocation *, 71156ff9c83SDavid Howells bool); 712f044c884SDavid Howells extern int afs_vl_get_entry_by_id(struct afs_net *, 7134d9df986SDavid Howells struct sockaddr_rxrpc *, struct key *, 71400d3b7a4SDavid Howells afs_volid_t, afs_voltype_t, 71556ff9c83SDavid Howells struct afs_cache_vlocation *, bool); 71608e0e7c8SDavid Howells 71708e0e7c8SDavid Howells /* 71808e0e7c8SDavid Howells * vlocation.c 71908e0e7c8SDavid Howells */ 720f044c884SDavid Howells extern struct workqueue_struct *afs_vlocation_update_worker; 721f044c884SDavid Howells 72208e0e7c8SDavid Howells #define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0) 72308e0e7c8SDavid Howells 724f044c884SDavid Howells extern struct afs_vlocation *afs_vlocation_lookup(struct afs_net *, 725f044c884SDavid Howells struct afs_cell *, 72600d3b7a4SDavid Howells struct key *, 72708e0e7c8SDavid Howells const char *, size_t); 728f044c884SDavid Howells extern void afs_put_vlocation(struct afs_net *, struct afs_vlocation *); 729f044c884SDavid Howells extern void afs_vlocation_updater(struct work_struct *); 730f044c884SDavid Howells extern void afs_vlocation_reaper(struct work_struct *); 731f044c884SDavid Howells extern void __net_exit afs_vlocation_purge(struct afs_net *); 73208e0e7c8SDavid Howells 73308e0e7c8SDavid Howells /* 73408e0e7c8SDavid Howells * vnode.c 73508e0e7c8SDavid Howells */ 73608e0e7c8SDavid Howells static inline struct afs_vnode *AFS_FS_I(struct inode *inode) 73708e0e7c8SDavid Howells { 73808e0e7c8SDavid Howells return container_of(inode, struct afs_vnode, vfs_inode); 73908e0e7c8SDavid Howells } 74008e0e7c8SDavid Howells 74108e0e7c8SDavid Howells static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) 74208e0e7c8SDavid Howells { 74308e0e7c8SDavid Howells return &vnode->vfs_inode; 74408e0e7c8SDavid Howells } 74508e0e7c8SDavid Howells 746260a9803SDavid Howells extern void afs_vnode_finalise_status_update(struct afs_vnode *, 747260a9803SDavid Howells struct afs_server *); 74800d3b7a4SDavid Howells extern int afs_vnode_fetch_status(struct afs_vnode *, struct afs_vnode *, 74900d3b7a4SDavid Howells struct key *); 75000d3b7a4SDavid Howells extern int afs_vnode_fetch_data(struct afs_vnode *, struct key *, 751196ee9cdSDavid Howells struct afs_read *); 752260a9803SDavid Howells extern int afs_vnode_create(struct afs_vnode *, struct key *, const char *, 753260a9803SDavid Howells umode_t, struct afs_fid *, struct afs_file_status *, 754260a9803SDavid Howells struct afs_callback *, struct afs_server **); 755260a9803SDavid Howells extern int afs_vnode_remove(struct afs_vnode *, struct key *, const char *, 756260a9803SDavid Howells bool); 757260a9803SDavid Howells extern int afs_vnode_link(struct afs_vnode *, struct afs_vnode *, struct key *, 758260a9803SDavid Howells const char *); 759260a9803SDavid Howells extern int afs_vnode_symlink(struct afs_vnode *, struct key *, const char *, 760260a9803SDavid Howells const char *, struct afs_fid *, 761260a9803SDavid Howells struct afs_file_status *, struct afs_server **); 762260a9803SDavid Howells extern int afs_vnode_rename(struct afs_vnode *, struct afs_vnode *, 763260a9803SDavid Howells struct key *, const char *, const char *); 76431143d5dSDavid Howells extern int afs_vnode_store_data(struct afs_writeback *, pgoff_t, pgoff_t, 76531143d5dSDavid Howells unsigned, unsigned); 76631143d5dSDavid Howells extern int afs_vnode_setattr(struct afs_vnode *, struct key *, struct iattr *); 76745222b9eSDavid Howells extern int afs_vnode_get_volume_status(struct afs_vnode *, struct key *, 76845222b9eSDavid Howells struct afs_volume_status *); 769e8d6c554SDavid Howells extern int afs_vnode_set_lock(struct afs_vnode *, struct key *, 770e8d6c554SDavid Howells afs_lock_type_t); 771e8d6c554SDavid Howells extern int afs_vnode_extend_lock(struct afs_vnode *, struct key *); 772e8d6c554SDavid Howells extern int afs_vnode_release_lock(struct afs_vnode *, struct key *); 77308e0e7c8SDavid Howells 77408e0e7c8SDavid Howells /* 77508e0e7c8SDavid Howells * volume.c 77608e0e7c8SDavid Howells */ 77749566f6fSDavid Howells static inline struct afs_volume *afs_get_volume(struct afs_volume *volume) 77849566f6fSDavid Howells { 77949566f6fSDavid Howells if (volume) 78049566f6fSDavid Howells atomic_inc(&volume->usage); 78149566f6fSDavid Howells return volume; 78249566f6fSDavid Howells } 78308e0e7c8SDavid Howells 7849ed900b1SDavid Howells extern void afs_put_volume(struct afs_cell *, struct afs_volume *); 78500d3b7a4SDavid Howells extern struct afs_volume *afs_volume_lookup(struct afs_mount_params *); 78608e0e7c8SDavid Howells extern struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *); 78708e0e7c8SDavid Howells extern int afs_volume_release_fileserver(struct afs_vnode *, 78808e0e7c8SDavid Howells struct afs_server *, int); 78908e0e7c8SDavid Howells 79031143d5dSDavid Howells /* 79131143d5dSDavid Howells * write.c 79231143d5dSDavid Howells */ 79331143d5dSDavid Howells extern int afs_set_page_dirty(struct page *); 79431143d5dSDavid Howells extern void afs_put_writeback(struct afs_writeback *); 79515b4650eSNick Piggin extern int afs_write_begin(struct file *file, struct address_space *mapping, 79615b4650eSNick Piggin loff_t pos, unsigned len, unsigned flags, 79715b4650eSNick Piggin struct page **pagep, void **fsdata); 79815b4650eSNick Piggin extern int afs_write_end(struct file *file, struct address_space *mapping, 79915b4650eSNick Piggin loff_t pos, unsigned len, unsigned copied, 80015b4650eSNick Piggin struct page *page, void *fsdata); 80131143d5dSDavid Howells extern int afs_writepage(struct page *, struct writeback_control *); 80231143d5dSDavid Howells extern int afs_writepages(struct address_space *, struct writeback_control *); 80331143d5dSDavid Howells extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *); 80450b5551dSAl Viro extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); 80531143d5dSDavid Howells extern int afs_writeback_all(struct afs_vnode *); 80658fed94dSDavid Howells extern int afs_flush(struct file *, fl_owner_t); 80702c24a82SJosef Bacik extern int afs_fsync(struct file *, loff_t, loff_t, int); 80831143d5dSDavid Howells 809d3e3b7eaSDavid Howells /* 810d3e3b7eaSDavid Howells * xattr.c 811d3e3b7eaSDavid Howells */ 812d3e3b7eaSDavid Howells extern const struct xattr_handler *afs_xattr_handlers[]; 813d3e3b7eaSDavid Howells extern ssize_t afs_listxattr(struct dentry *, char *, size_t); 81431143d5dSDavid Howells 81508e0e7c8SDavid Howells /*****************************************************************************/ 81608e0e7c8SDavid Howells /* 81708e0e7c8SDavid Howells * debug tracing 81808e0e7c8SDavid Howells */ 8198e8d7f13SDavid Howells #include <trace/events/afs.h> 8208e8d7f13SDavid Howells 82108e0e7c8SDavid Howells extern unsigned afs_debug; 82208e0e7c8SDavid Howells 82308e0e7c8SDavid Howells #define dbgprintk(FMT,...) \ 824ad16df84SSven Schnelle printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 82508e0e7c8SDavid Howells 826530b6412SHarvey Harrison #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 827530b6412SHarvey Harrison #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 82808e0e7c8SDavid Howells #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 82908e0e7c8SDavid Howells 83008e0e7c8SDavid Howells 83108e0e7c8SDavid Howells #if defined(__KDEBUG) 83208e0e7c8SDavid Howells #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 83308e0e7c8SDavid Howells #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 83408e0e7c8SDavid Howells #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 83508e0e7c8SDavid Howells 83608e0e7c8SDavid Howells #elif defined(CONFIG_AFS_DEBUG) 83708e0e7c8SDavid Howells #define AFS_DEBUG_KENTER 0x01 83808e0e7c8SDavid Howells #define AFS_DEBUG_KLEAVE 0x02 83908e0e7c8SDavid Howells #define AFS_DEBUG_KDEBUG 0x04 84008e0e7c8SDavid Howells 84108e0e7c8SDavid Howells #define _enter(FMT,...) \ 84208e0e7c8SDavid Howells do { \ 84308e0e7c8SDavid Howells if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ 84408e0e7c8SDavid Howells kenter(FMT,##__VA_ARGS__); \ 84508e0e7c8SDavid Howells } while (0) 84608e0e7c8SDavid Howells 84708e0e7c8SDavid Howells #define _leave(FMT,...) \ 84808e0e7c8SDavid Howells do { \ 84908e0e7c8SDavid Howells if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ 85008e0e7c8SDavid Howells kleave(FMT,##__VA_ARGS__); \ 85108e0e7c8SDavid Howells } while (0) 85208e0e7c8SDavid Howells 85308e0e7c8SDavid Howells #define _debug(FMT,...) \ 85408e0e7c8SDavid Howells do { \ 85508e0e7c8SDavid Howells if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ 85608e0e7c8SDavid Howells kdebug(FMT,##__VA_ARGS__); \ 85708e0e7c8SDavid Howells } while (0) 85808e0e7c8SDavid Howells 85908e0e7c8SDavid Howells #else 86012fdff3fSDavid Howells #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 86112fdff3fSDavid Howells #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 86212fdff3fSDavid Howells #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 86308e0e7c8SDavid Howells #endif 86408e0e7c8SDavid Howells 86508e0e7c8SDavid Howells /* 86608e0e7c8SDavid Howells * debug assertion checking 86708e0e7c8SDavid Howells */ 86808e0e7c8SDavid Howells #if 1 // defined(__KDEBUGALL) 86908e0e7c8SDavid Howells 87008e0e7c8SDavid Howells #define ASSERT(X) \ 87108e0e7c8SDavid Howells do { \ 87208e0e7c8SDavid Howells if (unlikely(!(X))) { \ 87308e0e7c8SDavid Howells printk(KERN_ERR "\n"); \ 87408e0e7c8SDavid Howells printk(KERN_ERR "AFS: Assertion failed\n"); \ 87508e0e7c8SDavid Howells BUG(); \ 87608e0e7c8SDavid Howells } \ 87708e0e7c8SDavid Howells } while(0) 87808e0e7c8SDavid Howells 87908e0e7c8SDavid Howells #define ASSERTCMP(X, OP, Y) \ 88008e0e7c8SDavid Howells do { \ 88108e0e7c8SDavid Howells if (unlikely(!((X) OP (Y)))) { \ 88208e0e7c8SDavid Howells printk(KERN_ERR "\n"); \ 88308e0e7c8SDavid Howells printk(KERN_ERR "AFS: Assertion failed\n"); \ 88408e0e7c8SDavid Howells printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 88508e0e7c8SDavid Howells (unsigned long)(X), (unsigned long)(Y)); \ 88608e0e7c8SDavid Howells printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 88708e0e7c8SDavid Howells (unsigned long)(X), (unsigned long)(Y)); \ 88808e0e7c8SDavid Howells BUG(); \ 88908e0e7c8SDavid Howells } \ 89008e0e7c8SDavid Howells } while(0) 89108e0e7c8SDavid Howells 892416351f2SDavid Howells #define ASSERTRANGE(L, OP1, N, OP2, H) \ 893416351f2SDavid Howells do { \ 894416351f2SDavid Howells if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ 895416351f2SDavid Howells printk(KERN_ERR "\n"); \ 896416351f2SDavid Howells printk(KERN_ERR "AFS: Assertion failed\n"); \ 897416351f2SDavid Howells printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ 898416351f2SDavid Howells (unsigned long)(L), (unsigned long)(N), \ 899416351f2SDavid Howells (unsigned long)(H)); \ 900416351f2SDavid Howells printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ 901416351f2SDavid Howells (unsigned long)(L), (unsigned long)(N), \ 902416351f2SDavid Howells (unsigned long)(H)); \ 903416351f2SDavid Howells BUG(); \ 904416351f2SDavid Howells } \ 905416351f2SDavid Howells } while(0) 906416351f2SDavid Howells 90708e0e7c8SDavid Howells #define ASSERTIF(C, X) \ 90808e0e7c8SDavid Howells do { \ 90908e0e7c8SDavid Howells if (unlikely((C) && !(X))) { \ 91008e0e7c8SDavid Howells printk(KERN_ERR "\n"); \ 91108e0e7c8SDavid Howells printk(KERN_ERR "AFS: Assertion failed\n"); \ 91208e0e7c8SDavid Howells BUG(); \ 91308e0e7c8SDavid Howells } \ 91408e0e7c8SDavid Howells } while(0) 91508e0e7c8SDavid Howells 91608e0e7c8SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 91708e0e7c8SDavid Howells do { \ 91808e0e7c8SDavid Howells if (unlikely((C) && !((X) OP (Y)))) { \ 91908e0e7c8SDavid Howells printk(KERN_ERR "\n"); \ 92008e0e7c8SDavid Howells printk(KERN_ERR "AFS: Assertion failed\n"); \ 92108e0e7c8SDavid Howells printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 92208e0e7c8SDavid Howells (unsigned long)(X), (unsigned long)(Y)); \ 92308e0e7c8SDavid Howells printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 92408e0e7c8SDavid Howells (unsigned long)(X), (unsigned long)(Y)); \ 92508e0e7c8SDavid Howells BUG(); \ 92608e0e7c8SDavid Howells } \ 92708e0e7c8SDavid Howells } while(0) 92808e0e7c8SDavid Howells 92908e0e7c8SDavid Howells #else 93008e0e7c8SDavid Howells 93108e0e7c8SDavid Howells #define ASSERT(X) \ 93208e0e7c8SDavid Howells do { \ 93308e0e7c8SDavid Howells } while(0) 93408e0e7c8SDavid Howells 93508e0e7c8SDavid Howells #define ASSERTCMP(X, OP, Y) \ 93608e0e7c8SDavid Howells do { \ 93708e0e7c8SDavid Howells } while(0) 93808e0e7c8SDavid Howells 939416351f2SDavid Howells #define ASSERTRANGE(L, OP1, N, OP2, H) \ 940416351f2SDavid Howells do { \ 941416351f2SDavid Howells } while(0) 942416351f2SDavid Howells 94308e0e7c8SDavid Howells #define ASSERTIF(C, X) \ 94408e0e7c8SDavid Howells do { \ 94508e0e7c8SDavid Howells } while(0) 94608e0e7c8SDavid Howells 94708e0e7c8SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 94808e0e7c8SDavid Howells do { \ 94908e0e7c8SDavid Howells } while(0) 95008e0e7c8SDavid Howells 95108e0e7c8SDavid Howells #endif /* __KDEBUGALL */ 952