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> 141da177e4SLinus Torvalds #include <linux/fs.h> 151da177e4SLinus Torvalds #include <linux/pagemap.h> 1608e0e7c8SDavid Howells #include <linux/skbuff.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> 2300c541eaSAndrew Morton 2408e0e7c8SDavid Howells #include "afs.h" 2508e0e7c8SDavid Howells #include "afs_vl.h" 2608e0e7c8SDavid Howells 2708e0e7c8SDavid Howells #define AFS_CELL_MAX_ADDRS 15 2808e0e7c8SDavid Howells 2931143d5dSDavid Howells struct pagevec; 3008e0e7c8SDavid Howells struct afs_call; 3108e0e7c8SDavid Howells 3208e0e7c8SDavid Howells typedef enum { 3308e0e7c8SDavid Howells AFS_VL_NEW, /* new, uninitialised record */ 3408e0e7c8SDavid Howells AFS_VL_CREATING, /* creating record */ 3508e0e7c8SDavid Howells AFS_VL_VALID, /* record is pending */ 3608e0e7c8SDavid Howells AFS_VL_NO_VOLUME, /* no such volume available */ 3708e0e7c8SDavid Howells AFS_VL_UPDATING, /* update in progress */ 3808e0e7c8SDavid Howells AFS_VL_VOLUME_DELETED, /* volume was deleted */ 3908e0e7c8SDavid Howells AFS_VL_UNCERTAIN, /* uncertain state (update failed) */ 4008e0e7c8SDavid Howells } __attribute__((packed)) afs_vlocation_state_t; 411da177e4SLinus Torvalds 4200d3b7a4SDavid Howells struct afs_mount_params { 4300d3b7a4SDavid Howells bool rwpath; /* T if the parent should be considered R/W */ 4400d3b7a4SDavid Howells bool force; /* T to force cell type */ 45bec5eb61Swanglei bool autocell; /* T if set auto mount operation */ 4600d3b7a4SDavid Howells afs_voltype_t type; /* type of volume requested */ 4700d3b7a4SDavid Howells int volnamesz; /* size of volume name */ 4800d3b7a4SDavid Howells const char *volname; /* name of volume to mount */ 4900d3b7a4SDavid Howells struct afs_cell *cell; /* cell in which to find volume */ 5000d3b7a4SDavid Howells struct afs_volume *volume; /* volume record */ 5100d3b7a4SDavid Howells struct key *key; /* key to use for secure mounting */ 5200d3b7a4SDavid Howells }; 5300d3b7a4SDavid Howells 541da177e4SLinus Torvalds /* 5508e0e7c8SDavid Howells * definition of how to wait for the completion of an operation 561da177e4SLinus Torvalds */ 5708e0e7c8SDavid Howells struct afs_wait_mode { 5808e0e7c8SDavid Howells /* RxRPC received message notification */ 5908e0e7c8SDavid Howells void (*rx_wakeup)(struct afs_call *call); 601da177e4SLinus Torvalds 6108e0e7c8SDavid Howells /* synchronous call waiter and call dispatched notification */ 6208e0e7c8SDavid Howells int (*wait)(struct afs_call *call); 6308e0e7c8SDavid Howells 6408e0e7c8SDavid Howells /* asynchronous call completion */ 6508e0e7c8SDavid Howells void (*async_complete)(void *reply, int error); 6608e0e7c8SDavid Howells }; 6708e0e7c8SDavid Howells 6808e0e7c8SDavid Howells extern const struct afs_wait_mode afs_sync_call; 6908e0e7c8SDavid Howells extern const struct afs_wait_mode afs_async_call; 7008e0e7c8SDavid Howells 7108e0e7c8SDavid Howells /* 7208e0e7c8SDavid Howells * a record of an in-progress RxRPC call 7308e0e7c8SDavid Howells */ 7408e0e7c8SDavid Howells struct afs_call { 7508e0e7c8SDavid Howells const struct afs_call_type *type; /* type of call */ 7608e0e7c8SDavid Howells const struct afs_wait_mode *wait_mode; /* completion wait mode */ 7708e0e7c8SDavid Howells wait_queue_head_t waitq; /* processes awaiting completion */ 78656f88ddSDavid Howells void (*async_workfn)(struct afs_call *call); /* asynchronous work function */ 7908e0e7c8SDavid Howells struct work_struct async_work; /* asynchronous work processor */ 8008e0e7c8SDavid Howells struct work_struct work; /* actual work processor */ 8108e0e7c8SDavid Howells struct sk_buff_head rx_queue; /* received packets */ 8208e0e7c8SDavid Howells struct rxrpc_call *rxcall; /* RxRPC call handle */ 8308e0e7c8SDavid Howells struct key *key; /* security for this call */ 8408e0e7c8SDavid Howells struct afs_server *server; /* server affected by incoming CM call */ 8508e0e7c8SDavid Howells void *request; /* request data (first part) */ 8631143d5dSDavid Howells struct address_space *mapping; /* page set */ 8731143d5dSDavid Howells struct afs_writeback *wb; /* writeback being performed */ 8808e0e7c8SDavid Howells void *buffer; /* reply receive buffer */ 8908e0e7c8SDavid Howells void *reply; /* reply buffer (first part) */ 9008e0e7c8SDavid Howells void *reply2; /* reply buffer (second part) */ 9108e0e7c8SDavid Howells void *reply3; /* reply buffer (third part) */ 92260a9803SDavid Howells void *reply4; /* reply buffer (fourth part) */ 9331143d5dSDavid Howells pgoff_t first; /* first page in mapping to deal with */ 9431143d5dSDavid Howells pgoff_t last; /* last page in mapping to deal with */ 9508e0e7c8SDavid Howells enum { /* call state */ 9608e0e7c8SDavid Howells AFS_CALL_REQUESTING, /* request is being sent for outgoing call */ 9708e0e7c8SDavid Howells AFS_CALL_AWAIT_REPLY, /* awaiting reply to outgoing call */ 9808e0e7c8SDavid Howells AFS_CALL_AWAIT_OP_ID, /* awaiting op ID on incoming call */ 9908e0e7c8SDavid Howells AFS_CALL_AWAIT_REQUEST, /* awaiting request data on incoming call */ 10008e0e7c8SDavid Howells AFS_CALL_REPLYING, /* replying to incoming call */ 10108e0e7c8SDavid Howells AFS_CALL_AWAIT_ACK, /* awaiting final ACK of incoming call */ 10208e0e7c8SDavid Howells AFS_CALL_COMPLETE, /* successfully completed */ 10308e0e7c8SDavid Howells AFS_CALL_BUSY, /* server was busy */ 10408e0e7c8SDavid Howells AFS_CALL_ABORTED, /* call was aborted */ 10508e0e7c8SDavid Howells AFS_CALL_ERROR, /* call failed due to error */ 10608e0e7c8SDavid Howells } state; 10708e0e7c8SDavid Howells int error; /* error code */ 10808e0e7c8SDavid Howells unsigned request_size; /* size of request data */ 10908e0e7c8SDavid Howells unsigned reply_max; /* maximum size of reply */ 11008e0e7c8SDavid Howells unsigned reply_size; /* current size of reply */ 11131143d5dSDavid Howells unsigned first_offset; /* offset into mapping[first] */ 11231143d5dSDavid Howells unsigned last_to; /* amount of mapping[last] */ 1132c724fb9SAnton Blanchard unsigned offset; /* offset into received data store */ 11408e0e7c8SDavid Howells unsigned char unmarshall; /* unmarshalling phase */ 11508e0e7c8SDavid Howells bool incoming; /* T if incoming call */ 11631143d5dSDavid Howells bool send_pages; /* T if data from mapping should be sent */ 11708e0e7c8SDavid Howells u16 service_id; /* RxRPC service ID to call */ 11808e0e7c8SDavid Howells __be16 port; /* target UDP port */ 11908e0e7c8SDavid Howells __be32 operation_ID; /* operation ID for an incoming call */ 12008e0e7c8SDavid Howells u32 count; /* count for use in unmarshalling */ 12108e0e7c8SDavid Howells __be32 tmp; /* place to extract temporary data */ 12231143d5dSDavid Howells afs_dataversion_t store_version; /* updated version expected from store */ 12308e0e7c8SDavid Howells }; 12408e0e7c8SDavid Howells 12508e0e7c8SDavid Howells struct afs_call_type { 12600d3b7a4SDavid Howells const char *name; 12700d3b7a4SDavid Howells 12808e0e7c8SDavid Howells /* deliver request or reply data to an call 12908e0e7c8SDavid Howells * - returning an error will cause the call to be aborted 13008e0e7c8SDavid Howells */ 13108e0e7c8SDavid Howells int (*deliver)(struct afs_call *call, struct sk_buff *skb, 13208e0e7c8SDavid Howells bool last); 13308e0e7c8SDavid Howells 13408e0e7c8SDavid Howells /* map an abort code to an error number */ 13508e0e7c8SDavid Howells int (*abort_to_error)(u32 abort_code); 13608e0e7c8SDavid Howells 13708e0e7c8SDavid Howells /* clean up a call */ 13808e0e7c8SDavid Howells void (*destructor)(struct afs_call *call); 13908e0e7c8SDavid Howells }; 14008e0e7c8SDavid Howells 14108e0e7c8SDavid Howells /* 14231143d5dSDavid Howells * record of an outstanding writeback on a vnode 14331143d5dSDavid Howells */ 14431143d5dSDavid Howells struct afs_writeback { 14531143d5dSDavid Howells struct list_head link; /* link in vnode->writebacks */ 14631143d5dSDavid Howells struct work_struct writer; /* work item to perform the writeback */ 14731143d5dSDavid Howells struct afs_vnode *vnode; /* vnode to which this write applies */ 14831143d5dSDavid Howells struct key *key; /* owner of this write */ 14931143d5dSDavid Howells wait_queue_head_t waitq; /* completion and ready wait queue */ 15031143d5dSDavid Howells pgoff_t first; /* first page in batch */ 15131143d5dSDavid Howells pgoff_t point; /* last page in current store op */ 15231143d5dSDavid Howells pgoff_t last; /* last page in batch (inclusive) */ 15331143d5dSDavid Howells unsigned offset_first; /* offset into first page of start of write */ 15431143d5dSDavid Howells unsigned to_last; /* offset into last page of end of write */ 15531143d5dSDavid Howells int num_conflicts; /* count of conflicting writes in list */ 15631143d5dSDavid Howells int usage; 15731143d5dSDavid Howells bool conflicts; /* T if has dependent conflicts */ 15831143d5dSDavid Howells enum { 15931143d5dSDavid Howells AFS_WBACK_SYNCING, /* synchronisation being performed */ 16031143d5dSDavid Howells AFS_WBACK_PENDING, /* write pending */ 16131143d5dSDavid Howells AFS_WBACK_CONFLICTING, /* conflicting writes posted */ 16231143d5dSDavid Howells AFS_WBACK_WRITING, /* writing back */ 16331143d5dSDavid Howells AFS_WBACK_COMPLETE /* the writeback record has been unlinked */ 16431143d5dSDavid Howells } state __attribute__((packed)); 16531143d5dSDavid Howells }; 16631143d5dSDavid Howells 16731143d5dSDavid Howells /* 16808e0e7c8SDavid Howells * AFS superblock private data 16908e0e7c8SDavid Howells * - there's one superblock per volume 17008e0e7c8SDavid Howells */ 17108e0e7c8SDavid Howells struct afs_super_info { 17208e0e7c8SDavid Howells struct afs_volume *volume; /* volume record */ 17308e0e7c8SDavid Howells char rwparent; /* T if parent is R/W AFS volume */ 17408e0e7c8SDavid Howells }; 17508e0e7c8SDavid Howells 17608e0e7c8SDavid Howells static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) 17708e0e7c8SDavid Howells { 17808e0e7c8SDavid Howells return sb->s_fs_info; 17908e0e7c8SDavid Howells } 18008e0e7c8SDavid Howells 18108e0e7c8SDavid Howells extern struct file_system_type afs_fs_type; 18208e0e7c8SDavid Howells 18308e0e7c8SDavid Howells /* 18408e0e7c8SDavid Howells * entry in the cached cell catalogue 18508e0e7c8SDavid Howells */ 18608e0e7c8SDavid Howells struct afs_cache_cell { 18700d3b7a4SDavid Howells char name[AFS_MAXCELLNAME]; /* cell name (padded with NULs) */ 18808e0e7c8SDavid Howells struct in_addr vl_servers[15]; /* cached cell VL servers */ 18908e0e7c8SDavid Howells }; 19008e0e7c8SDavid Howells 19108e0e7c8SDavid Howells /* 19208e0e7c8SDavid Howells * AFS cell record 19308e0e7c8SDavid Howells */ 19408e0e7c8SDavid Howells struct afs_cell { 19508e0e7c8SDavid Howells atomic_t usage; 19608e0e7c8SDavid Howells struct list_head link; /* main cell list link */ 19700d3b7a4SDavid Howells struct key *anonymous_key; /* anonymous user key for this cell */ 19808e0e7c8SDavid Howells struct list_head proc_link; /* /proc cell list link */ 1999b3f26c9SDavid Howells #ifdef CONFIG_AFS_FSCACHE 2009b3f26c9SDavid Howells struct fscache_cookie *cache; /* caching cookie */ 2011da177e4SLinus Torvalds #endif 2021da177e4SLinus Torvalds 20308e0e7c8SDavid Howells /* server record management */ 20408e0e7c8SDavid Howells rwlock_t servers_lock; /* active server list lock */ 20508e0e7c8SDavid Howells struct list_head servers; /* active server list */ 2061da177e4SLinus Torvalds 20708e0e7c8SDavid Howells /* volume location record management */ 20808e0e7c8SDavid Howells struct rw_semaphore vl_sem; /* volume management serialisation semaphore */ 20908e0e7c8SDavid Howells struct list_head vl_list; /* cell's active VL record list */ 21008e0e7c8SDavid Howells spinlock_t vl_lock; /* vl_list lock */ 21108e0e7c8SDavid Howells unsigned short vl_naddrs; /* number of VL servers in addr list */ 21208e0e7c8SDavid Howells unsigned short vl_curr_svix; /* current server index */ 21308e0e7c8SDavid Howells struct in_addr vl_addrs[AFS_CELL_MAX_ADDRS]; /* cell VL server addresses */ 21408e0e7c8SDavid Howells 21508e0e7c8SDavid Howells char name[0]; /* cell name - must go last */ 21608e0e7c8SDavid Howells }; 21708e0e7c8SDavid Howells 21808e0e7c8SDavid Howells /* 21908e0e7c8SDavid Howells * entry in the cached volume location catalogue 22008e0e7c8SDavid Howells */ 22108e0e7c8SDavid Howells struct afs_cache_vlocation { 22200d3b7a4SDavid Howells /* volume name (lowercase, padded with NULs) */ 22300d3b7a4SDavid Howells uint8_t name[AFS_MAXVOLNAME + 1]; 22400d3b7a4SDavid Howells 22508e0e7c8SDavid Howells uint8_t nservers; /* number of entries used in servers[] */ 22608e0e7c8SDavid Howells uint8_t vidmask; /* voltype mask for vid[] */ 22708e0e7c8SDavid Howells uint8_t srvtmask[8]; /* voltype masks for servers[] */ 22808e0e7c8SDavid Howells #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ 22908e0e7c8SDavid Howells #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ 23008e0e7c8SDavid Howells #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ 23108e0e7c8SDavid Howells 23208e0e7c8SDavid Howells afs_volid_t vid[3]; /* volume IDs for R/W, R/O and Bak volumes */ 23308e0e7c8SDavid Howells struct in_addr servers[8]; /* fileserver addresses */ 23408e0e7c8SDavid Howells time_t rtime; /* last retrieval time */ 23508e0e7c8SDavid Howells }; 23608e0e7c8SDavid Howells 23708e0e7c8SDavid Howells /* 23808e0e7c8SDavid Howells * volume -> vnode hash table entry 23908e0e7c8SDavid Howells */ 24008e0e7c8SDavid Howells struct afs_cache_vhash { 24108e0e7c8SDavid Howells afs_voltype_t vtype; /* which volume variation */ 24208e0e7c8SDavid Howells uint8_t hash_bucket; /* which hash bucket this represents */ 24308e0e7c8SDavid Howells } __attribute__((packed)); 24408e0e7c8SDavid Howells 24508e0e7c8SDavid Howells /* 24608e0e7c8SDavid Howells * AFS volume location record 24708e0e7c8SDavid Howells */ 24808e0e7c8SDavid Howells struct afs_vlocation { 24908e0e7c8SDavid Howells atomic_t usage; 25008e0e7c8SDavid Howells time_t time_of_death; /* time at which put reduced usage to 0 */ 25108e0e7c8SDavid Howells struct list_head link; /* link in cell volume location list */ 25208e0e7c8SDavid Howells struct list_head grave; /* link in master graveyard list */ 25308e0e7c8SDavid Howells struct list_head update; /* link in master update list */ 25408e0e7c8SDavid Howells struct afs_cell *cell; /* cell to which volume belongs */ 2559b3f26c9SDavid Howells #ifdef CONFIG_AFS_FSCACHE 2569b3f26c9SDavid Howells struct fscache_cookie *cache; /* caching cookie */ 25708e0e7c8SDavid Howells #endif 25808e0e7c8SDavid Howells struct afs_cache_vlocation vldb; /* volume information DB record */ 25908e0e7c8SDavid Howells struct afs_volume *vols[3]; /* volume access record pointer (index by type) */ 26008e0e7c8SDavid Howells wait_queue_head_t waitq; /* status change waitqueue */ 26108e0e7c8SDavid Howells time_t update_at; /* time at which record should be updated */ 26239bf0949SDavid S. Miller spinlock_t lock; /* access lock */ 26308e0e7c8SDavid Howells afs_vlocation_state_t state; /* volume location state */ 26408e0e7c8SDavid Howells unsigned short upd_rej_cnt; /* ENOMEDIUM count during update */ 26508e0e7c8SDavid Howells unsigned short upd_busy_cnt; /* EBUSY count during update */ 26608e0e7c8SDavid Howells bool valid; /* T if valid */ 26708e0e7c8SDavid Howells }; 26808e0e7c8SDavid Howells 26908e0e7c8SDavid Howells /* 27008e0e7c8SDavid Howells * AFS fileserver record 27108e0e7c8SDavid Howells */ 27208e0e7c8SDavid Howells struct afs_server { 27308e0e7c8SDavid Howells atomic_t usage; 27408e0e7c8SDavid Howells time_t time_of_death; /* time at which put reduced usage to 0 */ 27508e0e7c8SDavid Howells struct in_addr addr; /* server address */ 27608e0e7c8SDavid Howells struct afs_cell *cell; /* cell in which server resides */ 27708e0e7c8SDavid Howells struct list_head link; /* link in cell's server list */ 27808e0e7c8SDavid Howells struct list_head grave; /* link in master graveyard list */ 27908e0e7c8SDavid Howells struct rb_node master_rb; /* link in master by-addr tree */ 28008e0e7c8SDavid Howells struct rw_semaphore sem; /* access lock */ 28108e0e7c8SDavid Howells 28208e0e7c8SDavid Howells /* file service access */ 28308e0e7c8SDavid Howells struct rb_root fs_vnodes; /* vnodes backed by this server (ordered by FID) */ 28408e0e7c8SDavid Howells unsigned long fs_act_jif; /* time at which last activity occurred */ 28508e0e7c8SDavid Howells unsigned long fs_dead_jif; /* time at which no longer to be considered dead */ 28608e0e7c8SDavid Howells spinlock_t fs_lock; /* access lock */ 28708e0e7c8SDavid Howells int fs_state; /* 0 or reason FS currently marked dead (-errno) */ 28808e0e7c8SDavid Howells 28908e0e7c8SDavid Howells /* callback promise management */ 29008e0e7c8SDavid Howells struct rb_root cb_promises; /* vnode expiration list (ordered earliest first) */ 29108e0e7c8SDavid Howells struct delayed_work cb_updater; /* callback updater */ 29208e0e7c8SDavid Howells struct delayed_work cb_break_work; /* collected break dispatcher */ 29308e0e7c8SDavid Howells wait_queue_head_t cb_break_waitq; /* space available in cb_break waitqueue */ 29408e0e7c8SDavid Howells spinlock_t cb_lock; /* access lock */ 29508e0e7c8SDavid Howells struct afs_callback cb_break[64]; /* ring of callbacks awaiting breaking */ 29608e0e7c8SDavid Howells atomic_t cb_break_n; /* number of pending breaks */ 29708e0e7c8SDavid Howells u8 cb_break_head; /* head of callback breaking ring */ 29808e0e7c8SDavid Howells u8 cb_break_tail; /* tail of callback breaking ring */ 29908e0e7c8SDavid Howells }; 30008e0e7c8SDavid Howells 30108e0e7c8SDavid Howells /* 30208e0e7c8SDavid Howells * AFS volume access record 30308e0e7c8SDavid Howells */ 30408e0e7c8SDavid Howells struct afs_volume { 30508e0e7c8SDavid Howells atomic_t usage; 30608e0e7c8SDavid Howells struct afs_cell *cell; /* cell to which belongs (unrefd ptr) */ 30708e0e7c8SDavid Howells struct afs_vlocation *vlocation; /* volume location */ 3089b3f26c9SDavid Howells #ifdef CONFIG_AFS_FSCACHE 3099b3f26c9SDavid Howells struct fscache_cookie *cache; /* caching cookie */ 31008e0e7c8SDavid Howells #endif 31108e0e7c8SDavid Howells afs_volid_t vid; /* volume ID */ 31208e0e7c8SDavid Howells afs_voltype_t type; /* type of volume */ 31308e0e7c8SDavid Howells char type_force; /* force volume type (suppress R/O -> R/W) */ 31408e0e7c8SDavid Howells unsigned short nservers; /* number of server slots filled */ 31508e0e7c8SDavid Howells unsigned short rjservers; /* number of servers discarded due to -ENOMEDIUM */ 31608e0e7c8SDavid Howells struct afs_server *servers[8]; /* servers on which volume resides (ordered) */ 31708e0e7c8SDavid Howells struct rw_semaphore server_sem; /* lock for accessing current server */ 318e1da0222SJens Axboe struct backing_dev_info bdi; 31908e0e7c8SDavid Howells }; 32008e0e7c8SDavid Howells 32108e0e7c8SDavid Howells /* 32208e0e7c8SDavid Howells * vnode catalogue entry 32308e0e7c8SDavid Howells */ 32408e0e7c8SDavid Howells struct afs_cache_vnode { 32508e0e7c8SDavid Howells afs_vnodeid_t vnode_id; /* vnode ID */ 32608e0e7c8SDavid Howells unsigned vnode_unique; /* vnode ID uniquifier */ 32708e0e7c8SDavid Howells afs_dataversion_t data_version; /* data version */ 32808e0e7c8SDavid Howells }; 32908e0e7c8SDavid Howells 33008e0e7c8SDavid Howells /* 33108e0e7c8SDavid Howells * AFS inode private data 33208e0e7c8SDavid Howells */ 33308e0e7c8SDavid Howells struct afs_vnode { 33408e0e7c8SDavid Howells struct inode vfs_inode; /* the VFS's inode record */ 33508e0e7c8SDavid Howells 33608e0e7c8SDavid Howells struct afs_volume *volume; /* volume on which vnode resides */ 33708e0e7c8SDavid Howells struct afs_server *server; /* server currently supplying this file */ 33808e0e7c8SDavid Howells struct afs_fid fid; /* the file identifier for this inode */ 33908e0e7c8SDavid Howells struct afs_file_status status; /* AFS status info for this file */ 3409b3f26c9SDavid Howells #ifdef CONFIG_AFS_FSCACHE 3419b3f26c9SDavid Howells struct fscache_cookie *cache; /* caching cookie */ 34208e0e7c8SDavid Howells #endif 34300d3b7a4SDavid Howells struct afs_permits *permits; /* cache of permits so far obtained */ 34400d3b7a4SDavid Howells struct mutex permits_lock; /* lock for altering permits list */ 345260a9803SDavid Howells struct mutex validate_lock; /* lock for validating this vnode */ 34608e0e7c8SDavid Howells wait_queue_head_t update_waitq; /* status fetch waitqueue */ 347260a9803SDavid Howells int update_cnt; /* number of outstanding ops that will update the 34808e0e7c8SDavid Howells * status */ 34931143d5dSDavid Howells spinlock_t writeback_lock; /* lock for writebacks */ 35008e0e7c8SDavid Howells spinlock_t lock; /* waitqueue/flags lock */ 35108e0e7c8SDavid Howells unsigned long flags; 35208e0e7c8SDavid Howells #define AFS_VNODE_CB_BROKEN 0 /* set if vnode's callback was broken */ 353260a9803SDavid Howells #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ 35408e0e7c8SDavid Howells #define AFS_VNODE_MODIFIED 2 /* set if vnode's data modified */ 35508e0e7c8SDavid Howells #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ 35608e0e7c8SDavid Howells #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ 35708e0e7c8SDavid Howells #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ 358e8d6c554SDavid Howells #define AFS_VNODE_LOCKING 6 /* set if waiting for lock on vnode */ 359e8d6c554SDavid Howells #define AFS_VNODE_READLOCKED 7 /* set if vnode is read-locked on the server */ 360e8d6c554SDavid Howells #define AFS_VNODE_WRITELOCKED 8 /* set if vnode is write-locked on the server */ 361e8d6c554SDavid Howells #define AFS_VNODE_UNLOCKING 9 /* set if vnode is being unlocked on the server */ 362bec5eb61Swanglei #define AFS_VNODE_AUTOCELL 10 /* set if Vnode is an auto mount point */ 363bec5eb61Swanglei #define AFS_VNODE_PSEUDODIR 11 /* set if Vnode is a pseudo directory */ 36408e0e7c8SDavid Howells 36500d3b7a4SDavid Howells long acl_order; /* ACL check count (callback break count) */ 36600d3b7a4SDavid Howells 36731143d5dSDavid Howells struct list_head writebacks; /* alterations in pagecache that need writing */ 368e8d6c554SDavid Howells struct list_head pending_locks; /* locks waiting to be granted */ 369e8d6c554SDavid Howells struct list_head granted_locks; /* locks granted on this file */ 370e8d6c554SDavid Howells struct delayed_work lock_work; /* work to be done in locking */ 371e8d6c554SDavid Howells struct key *unlock_key; /* key to be used in unlocking */ 37231143d5dSDavid Howells 37308e0e7c8SDavid Howells /* outstanding callback notification on this file */ 37408e0e7c8SDavid Howells struct rb_node server_rb; /* link in server->fs_vnodes */ 37508e0e7c8SDavid Howells struct rb_node cb_promise; /* link in server->cb_promises */ 37608e0e7c8SDavid Howells struct work_struct cb_broken_work; /* work to be done on callback break */ 37708e0e7c8SDavid Howells time_t cb_expires; /* time at which callback expires */ 37808e0e7c8SDavid Howells time_t cb_expires_at; /* time used to order cb_promise */ 37908e0e7c8SDavid Howells unsigned cb_version; /* callback version */ 38008e0e7c8SDavid Howells unsigned cb_expiry; /* callback expiry time */ 38108e0e7c8SDavid Howells afs_callback_type_t cb_type; /* type of callback */ 38208e0e7c8SDavid Howells bool cb_promised; /* true if promise still holds */ 38308e0e7c8SDavid Howells }; 38408e0e7c8SDavid Howells 38500d3b7a4SDavid Howells /* 38600d3b7a4SDavid Howells * cached security record for one user's attempt to access a vnode 38700d3b7a4SDavid Howells */ 38800d3b7a4SDavid Howells struct afs_permit { 38900d3b7a4SDavid Howells struct key *key; /* RxRPC ticket holding a security context */ 39000d3b7a4SDavid Howells afs_access_t access_mask; /* access mask for this key */ 39100d3b7a4SDavid Howells }; 39200d3b7a4SDavid Howells 39300d3b7a4SDavid Howells /* 39400d3b7a4SDavid Howells * cache of security records from attempts to access a vnode 39500d3b7a4SDavid Howells */ 39600d3b7a4SDavid Howells struct afs_permits { 39700d3b7a4SDavid Howells struct rcu_head rcu; /* disposal procedure */ 39800d3b7a4SDavid Howells int count; /* number of records */ 39900d3b7a4SDavid Howells struct afs_permit permits[0]; /* the permits so far examined */ 40000d3b7a4SDavid Howells }; 40100d3b7a4SDavid Howells 402b908fe6bSDavid Howells /* 403b908fe6bSDavid Howells * record of one of a system's set of network interfaces 404b908fe6bSDavid Howells */ 405b908fe6bSDavid Howells struct afs_interface { 406b908fe6bSDavid Howells struct in_addr address; /* IPv4 address bound to interface */ 407b908fe6bSDavid Howells struct in_addr netmask; /* netmask applied to address */ 408b908fe6bSDavid Howells unsigned mtu; /* MTU of interface */ 409b908fe6bSDavid Howells }; 410b908fe6bSDavid Howells 411b908fe6bSDavid Howells /* 412b908fe6bSDavid Howells * UUID definition [internet draft] 413b908fe6bSDavid Howells * - the timestamp is a 60-bit value, split 32/16/12, and goes in 100ns 414b908fe6bSDavid Howells * increments since midnight 15th October 1582 415b908fe6bSDavid Howells * - add AFS_UUID_TO_UNIX_TIME to convert unix time in 100ns units to UUID 416b908fe6bSDavid Howells * time 417b908fe6bSDavid Howells * - the clock sequence is a 14-bit counter to avoid duplicate times 418b908fe6bSDavid Howells */ 419b908fe6bSDavid Howells struct afs_uuid { 420b908fe6bSDavid Howells u32 time_low; /* low part of timestamp */ 421b908fe6bSDavid Howells u16 time_mid; /* mid part of timestamp */ 422b908fe6bSDavid Howells u16 time_hi_and_version; /* high part of timestamp and version */ 423b1bdb691SDavid Howells #define AFS_UUID_TO_UNIX_TIME 0x01b21dd213814000ULL 424b908fe6bSDavid Howells #define AFS_UUID_TIMEHI_MASK 0x0fff 425b908fe6bSDavid Howells #define AFS_UUID_VERSION_TIME 0x1000 /* time-based UUID */ 426b908fe6bSDavid Howells #define AFS_UUID_VERSION_NAME 0x3000 /* name-based UUID */ 427b908fe6bSDavid Howells #define AFS_UUID_VERSION_RANDOM 0x4000 /* (pseudo-)random generated UUID */ 428b908fe6bSDavid Howells u8 clock_seq_hi_and_reserved; /* clock seq hi and variant */ 429b908fe6bSDavid Howells #define AFS_UUID_CLOCKHI_MASK 0x3f 430b908fe6bSDavid Howells #define AFS_UUID_VARIANT_STD 0x80 431b908fe6bSDavid Howells u8 clock_seq_low; /* clock seq low */ 432b908fe6bSDavid Howells u8 node[6]; /* spatially unique node ID (MAC addr) */ 433b908fe6bSDavid Howells }; 434b908fe6bSDavid Howells 43508e0e7c8SDavid Howells /*****************************************************************************/ 43608e0e7c8SDavid Howells /* 4379b3f26c9SDavid Howells * cache.c 4389b3f26c9SDavid Howells */ 4399b3f26c9SDavid Howells #ifdef CONFIG_AFS_FSCACHE 4409b3f26c9SDavid Howells extern struct fscache_netfs afs_cache_netfs; 4419b3f26c9SDavid Howells extern struct fscache_cookie_def afs_cell_cache_index_def; 4429b3f26c9SDavid Howells extern struct fscache_cookie_def afs_vlocation_cache_index_def; 4439b3f26c9SDavid Howells extern struct fscache_cookie_def afs_volume_cache_index_def; 4449b3f26c9SDavid Howells extern struct fscache_cookie_def afs_vnode_cache_index_def; 4459b3f26c9SDavid Howells #else 4469b3f26c9SDavid Howells #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL) 4479b3f26c9SDavid Howells #define afs_vlocation_cache_index_def (*(struct fscache_cookie_def *) NULL) 4489b3f26c9SDavid Howells #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL) 4499b3f26c9SDavid Howells #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL) 4509b3f26c9SDavid Howells #endif 4519b3f26c9SDavid Howells 4529b3f26c9SDavid Howells /* 45308e0e7c8SDavid Howells * callback.c 45408e0e7c8SDavid Howells */ 45508e0e7c8SDavid Howells extern void afs_init_callback_state(struct afs_server *); 45608e0e7c8SDavid Howells extern void afs_broken_callback_work(struct work_struct *); 45708e0e7c8SDavid Howells extern void afs_break_callbacks(struct afs_server *, size_t, 45808e0e7c8SDavid Howells struct afs_callback[]); 459260a9803SDavid Howells extern void afs_discard_callback_on_delete(struct afs_vnode *); 46008e0e7c8SDavid Howells extern void afs_give_up_callback(struct afs_vnode *); 46108e0e7c8SDavid Howells extern void afs_dispatch_give_up_callbacks(struct work_struct *); 46208e0e7c8SDavid Howells extern void afs_flush_callback_breaks(struct afs_server *); 46308e0e7c8SDavid Howells extern int __init afs_callback_update_init(void); 464fbb3fcbaSDavid Howells extern void afs_callback_update_kill(void); 4651da177e4SLinus Torvalds 4661da177e4SLinus Torvalds /* 4671da177e4SLinus Torvalds * cell.c 4681da177e4SLinus Torvalds */ 4691da177e4SLinus Torvalds extern struct rw_semaphore afs_proc_cells_sem; 4701da177e4SLinus Torvalds extern struct list_head afs_proc_cells; 4711da177e4SLinus Torvalds 47208e0e7c8SDavid Howells #define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0) 47308e0e7c8SDavid Howells extern int afs_cell_init(char *); 474bec5eb61Swanglei extern struct afs_cell *afs_cell_create(const char *, unsigned, char *, bool); 475bec5eb61Swanglei extern struct afs_cell *afs_cell_lookup(const char *, unsigned, bool); 47608e0e7c8SDavid Howells extern struct afs_cell *afs_grab_cell(struct afs_cell *); 47708e0e7c8SDavid Howells extern void afs_put_cell(struct afs_cell *); 47808e0e7c8SDavid Howells extern void afs_cell_purge(void); 47908e0e7c8SDavid Howells 48008e0e7c8SDavid Howells /* 48108e0e7c8SDavid Howells * cmservice.c 48208e0e7c8SDavid Howells */ 48308e0e7c8SDavid Howells extern bool afs_cm_incoming_call(struct afs_call *); 48408e0e7c8SDavid Howells 4851da177e4SLinus Torvalds /* 4861da177e4SLinus Torvalds * dir.c 4871da177e4SLinus Torvalds */ 488754661f1SArjan van de Ven extern const struct inode_operations afs_dir_inode_operations; 489d61dcce2SAl Viro extern const struct dentry_operations afs_fs_dentry_operations; 4904b6f5d20SArjan van de Ven extern const struct file_operations afs_dir_file_operations; 4911da177e4SLinus Torvalds 4921da177e4SLinus Torvalds /* 4931da177e4SLinus Torvalds * file.c 4941da177e4SLinus Torvalds */ 495f5e54d6eSChristoph Hellwig extern const struct address_space_operations afs_fs_aops; 496754661f1SArjan van de Ven extern const struct inode_operations afs_file_inode_operations; 49700d3b7a4SDavid Howells extern const struct file_operations afs_file_operations; 49800d3b7a4SDavid Howells 49900d3b7a4SDavid Howells extern int afs_open(struct inode *, struct file *); 50000d3b7a4SDavid Howells extern int afs_release(struct inode *, struct file *); 501f6d335c0SAl Viro extern int afs_page_filler(void *, struct page *); 5021da177e4SLinus Torvalds 5031da177e4SLinus Torvalds /* 504e8d6c554SDavid Howells * flock.c 505e8d6c554SDavid Howells */ 506e8d6c554SDavid Howells extern void __exit afs_kill_lock_manager(void); 507e8d6c554SDavid Howells extern void afs_lock_work(struct work_struct *); 508e8d6c554SDavid Howells extern void afs_lock_may_be_available(struct afs_vnode *); 509e8d6c554SDavid Howells extern int afs_lock(struct file *, int, struct file_lock *); 510e8d6c554SDavid Howells extern int afs_flock(struct file *, int, struct file_lock *); 511e8d6c554SDavid Howells 512e8d6c554SDavid Howells /* 51308e0e7c8SDavid Howells * fsclient.c 51408e0e7c8SDavid Howells */ 51500d3b7a4SDavid Howells extern int afs_fs_fetch_file_status(struct afs_server *, struct key *, 51600d3b7a4SDavid Howells struct afs_vnode *, struct afs_volsync *, 51708e0e7c8SDavid Howells const struct afs_wait_mode *); 51808e0e7c8SDavid Howells extern int afs_fs_give_up_callbacks(struct afs_server *, 51908e0e7c8SDavid Howells const struct afs_wait_mode *); 52000d3b7a4SDavid Howells extern int afs_fs_fetch_data(struct afs_server *, struct key *, 52100d3b7a4SDavid Howells struct afs_vnode *, off_t, size_t, struct page *, 522260a9803SDavid Howells const struct afs_wait_mode *); 523260a9803SDavid Howells extern int afs_fs_create(struct afs_server *, struct key *, 524260a9803SDavid Howells struct afs_vnode *, const char *, umode_t, 525260a9803SDavid Howells struct afs_fid *, struct afs_file_status *, 526260a9803SDavid Howells struct afs_callback *, 527260a9803SDavid Howells const struct afs_wait_mode *); 528260a9803SDavid Howells extern int afs_fs_remove(struct afs_server *, struct key *, 529260a9803SDavid Howells struct afs_vnode *, const char *, bool, 530260a9803SDavid Howells const struct afs_wait_mode *); 531260a9803SDavid Howells extern int afs_fs_link(struct afs_server *, struct key *, struct afs_vnode *, 532260a9803SDavid Howells struct afs_vnode *, const char *, 533260a9803SDavid Howells const struct afs_wait_mode *); 534260a9803SDavid Howells extern int afs_fs_symlink(struct afs_server *, struct key *, 535260a9803SDavid Howells struct afs_vnode *, const char *, const char *, 536260a9803SDavid Howells struct afs_fid *, struct afs_file_status *, 537260a9803SDavid Howells const struct afs_wait_mode *); 538260a9803SDavid Howells extern int afs_fs_rename(struct afs_server *, struct key *, 539260a9803SDavid Howells struct afs_vnode *, const char *, 540260a9803SDavid Howells struct afs_vnode *, const char *, 54108e0e7c8SDavid Howells const struct afs_wait_mode *); 54231143d5dSDavid Howells extern int afs_fs_store_data(struct afs_server *, struct afs_writeback *, 54331143d5dSDavid Howells pgoff_t, pgoff_t, unsigned, unsigned, 54431143d5dSDavid Howells const struct afs_wait_mode *); 54531143d5dSDavid Howells extern int afs_fs_setattr(struct afs_server *, struct key *, 54631143d5dSDavid Howells struct afs_vnode *, struct iattr *, 54731143d5dSDavid Howells const struct afs_wait_mode *); 54845222b9eSDavid Howells extern int afs_fs_get_volume_status(struct afs_server *, struct key *, 54945222b9eSDavid Howells struct afs_vnode *, 55045222b9eSDavid Howells struct afs_volume_status *, 55145222b9eSDavid Howells const struct afs_wait_mode *); 552e8d6c554SDavid Howells extern int afs_fs_set_lock(struct afs_server *, struct key *, 553e8d6c554SDavid Howells struct afs_vnode *, afs_lock_type_t, 554e8d6c554SDavid Howells const struct afs_wait_mode *); 555e8d6c554SDavid Howells extern int afs_fs_extend_lock(struct afs_server *, struct key *, 556e8d6c554SDavid Howells struct afs_vnode *, 557e8d6c554SDavid Howells const struct afs_wait_mode *); 558e8d6c554SDavid Howells extern int afs_fs_release_lock(struct afs_server *, struct key *, 559e8d6c554SDavid Howells struct afs_vnode *, 560e8d6c554SDavid Howells const struct afs_wait_mode *); 56108e0e7c8SDavid Howells 56208e0e7c8SDavid Howells /* 5631da177e4SLinus Torvalds * inode.c 5641da177e4SLinus Torvalds */ 565bec5eb61Swanglei extern struct inode *afs_iget_autocell(struct inode *, const char *, int, 566bec5eb61Swanglei struct key *); 56700d3b7a4SDavid Howells extern struct inode *afs_iget(struct super_block *, struct key *, 568260a9803SDavid Howells struct afs_fid *, struct afs_file_status *, 569260a9803SDavid Howells struct afs_callback *); 570416351f2SDavid Howells extern void afs_zap_data(struct afs_vnode *); 571260a9803SDavid Howells extern int afs_validate(struct afs_vnode *, struct key *); 572416351f2SDavid Howells extern int afs_getattr(struct vfsmount *, struct dentry *, struct kstat *); 57331143d5dSDavid Howells extern int afs_setattr(struct dentry *, struct iattr *); 574b57922d9SAl Viro extern void afs_evict_inode(struct inode *); 575bec5eb61Swanglei extern int afs_drop_inode(struct inode *); 5761da177e4SLinus Torvalds 5771da177e4SLinus Torvalds /* 5781da177e4SLinus Torvalds * main.c 5791da177e4SLinus Torvalds */ 5800ad53eeeSTejun Heo extern struct workqueue_struct *afs_wq; 581b908fe6bSDavid Howells extern struct afs_uuid afs_uuid; 5821da177e4SLinus Torvalds 5831da177e4SLinus Torvalds /* 58408e0e7c8SDavid Howells * misc.c 58508e0e7c8SDavid Howells */ 58608e0e7c8SDavid Howells extern int afs_abort_to_error(u32); 58708e0e7c8SDavid Howells 58808e0e7c8SDavid Howells /* 5891da177e4SLinus Torvalds * mntpt.c 5901da177e4SLinus Torvalds */ 591754661f1SArjan van de Ven extern const struct inode_operations afs_mntpt_inode_operations; 592bec5eb61Swanglei extern const struct inode_operations afs_autocell_inode_operations; 5934b6f5d20SArjan van de Ven extern const struct file_operations afs_mntpt_file_operations; 5941da177e4SLinus Torvalds 595d18610b0SDavid Howells extern struct vfsmount *afs_d_automount(struct path *); 59600d3b7a4SDavid Howells extern int afs_mntpt_check_symlink(struct afs_vnode *, struct key *); 59708e0e7c8SDavid Howells extern void afs_mntpt_kill_timer(void); 5981da177e4SLinus Torvalds 5991da177e4SLinus Torvalds /* 6001da177e4SLinus Torvalds * proc.c 6011da177e4SLinus Torvalds */ 6021da177e4SLinus Torvalds extern int afs_proc_init(void); 6031da177e4SLinus Torvalds extern void afs_proc_cleanup(void); 604ec26815aSDavid Howells extern int afs_proc_cell_setup(struct afs_cell *); 605ec26815aSDavid Howells extern void afs_proc_cell_remove(struct afs_cell *); 6061da177e4SLinus Torvalds 60708e0e7c8SDavid Howells /* 60808e0e7c8SDavid Howells * rxrpc.c 60908e0e7c8SDavid Howells */ 61008e0e7c8SDavid Howells extern int afs_open_socket(void); 61108e0e7c8SDavid Howells extern void afs_close_socket(void); 612372ee163SDavid Howells extern void afs_data_consumed(struct afs_call *, struct sk_buff *); 61308e0e7c8SDavid Howells extern int afs_make_call(struct in_addr *, struct afs_call *, gfp_t, 61408e0e7c8SDavid Howells const struct afs_wait_mode *); 61508e0e7c8SDavid Howells extern struct afs_call *afs_alloc_flat_call(const struct afs_call_type *, 61608e0e7c8SDavid Howells size_t, size_t); 61708e0e7c8SDavid Howells extern void afs_flat_call_destructor(struct afs_call *); 618372ee163SDavid Howells extern int afs_transfer_reply(struct afs_call *, struct sk_buff *, bool); 61908e0e7c8SDavid Howells extern void afs_send_empty_reply(struct afs_call *); 620b908fe6bSDavid Howells extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); 62108e0e7c8SDavid Howells extern int afs_extract_data(struct afs_call *, struct sk_buff *, bool, void *, 62208e0e7c8SDavid Howells size_t); 62308e0e7c8SDavid Howells 624372ee163SDavid Howells static inline int afs_data_complete(struct afs_call *call, struct sk_buff *skb, 625372ee163SDavid Howells bool last) 626372ee163SDavid Howells { 627372ee163SDavid Howells if (skb->len > 0) 628372ee163SDavid Howells return -EBADMSG; 629372ee163SDavid Howells afs_data_consumed(call, skb); 630372ee163SDavid Howells if (!last) 631372ee163SDavid Howells return -EAGAIN; 632372ee163SDavid Howells return 0; 633372ee163SDavid Howells } 634372ee163SDavid Howells 63508e0e7c8SDavid Howells /* 63600d3b7a4SDavid Howells * security.c 63700d3b7a4SDavid Howells */ 63800d3b7a4SDavid Howells extern void afs_clear_permits(struct afs_vnode *); 63900d3b7a4SDavid Howells extern void afs_cache_permit(struct afs_vnode *, struct key *, long); 640416351f2SDavid Howells extern void afs_zap_permits(struct rcu_head *); 64100d3b7a4SDavid Howells extern struct key *afs_request_key(struct afs_cell *); 64210556cb2SAl Viro extern int afs_permission(struct inode *, int); 64300d3b7a4SDavid Howells 64400d3b7a4SDavid Howells /* 64508e0e7c8SDavid Howells * server.c 64608e0e7c8SDavid Howells */ 64708e0e7c8SDavid Howells extern spinlock_t afs_server_peer_lock; 64808e0e7c8SDavid Howells 649260a9803SDavid Howells #define afs_get_server(S) \ 650260a9803SDavid Howells do { \ 651260a9803SDavid Howells _debug("GET SERVER %d", atomic_read(&(S)->usage)); \ 652260a9803SDavid Howells atomic_inc(&(S)->usage); \ 653260a9803SDavid Howells } while(0) 65408e0e7c8SDavid Howells 65508e0e7c8SDavid Howells extern struct afs_server *afs_lookup_server(struct afs_cell *, 65608e0e7c8SDavid Howells const struct in_addr *); 65708e0e7c8SDavid Howells extern struct afs_server *afs_find_server(const struct in_addr *); 65808e0e7c8SDavid Howells extern void afs_put_server(struct afs_server *); 65908e0e7c8SDavid Howells extern void __exit afs_purge_servers(void); 66008e0e7c8SDavid Howells 66108e0e7c8SDavid Howells /* 66200d3b7a4SDavid Howells * super.c 66300d3b7a4SDavid Howells */ 66400d3b7a4SDavid Howells extern int afs_fs_init(void); 66500d3b7a4SDavid Howells extern void afs_fs_exit(void); 66600d3b7a4SDavid Howells 66700d3b7a4SDavid Howells /* 668b908fe6bSDavid Howells * use-rtnetlink.c 669b908fe6bSDavid Howells */ 670b908fe6bSDavid Howells extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool); 671ec9c9485SDavid Howells extern int afs_get_MAC_address(u8 *, size_t); 672b908fe6bSDavid Howells 673b908fe6bSDavid Howells /* 67408e0e7c8SDavid Howells * vlclient.c 67508e0e7c8SDavid Howells */ 67600d3b7a4SDavid Howells extern int afs_vl_get_entry_by_name(struct in_addr *, struct key *, 67700d3b7a4SDavid Howells const char *, struct afs_cache_vlocation *, 67808e0e7c8SDavid Howells const struct afs_wait_mode *); 67900d3b7a4SDavid Howells extern int afs_vl_get_entry_by_id(struct in_addr *, struct key *, 68000d3b7a4SDavid Howells afs_volid_t, afs_voltype_t, 68108e0e7c8SDavid Howells struct afs_cache_vlocation *, 68208e0e7c8SDavid Howells const struct afs_wait_mode *); 68308e0e7c8SDavid Howells 68408e0e7c8SDavid Howells /* 68508e0e7c8SDavid Howells * vlocation.c 68608e0e7c8SDavid Howells */ 68708e0e7c8SDavid Howells #define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0) 68808e0e7c8SDavid Howells 68908e0e7c8SDavid Howells extern int __init afs_vlocation_update_init(void); 69008e0e7c8SDavid Howells extern struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *, 69100d3b7a4SDavid Howells struct key *, 69208e0e7c8SDavid Howells const char *, size_t); 69308e0e7c8SDavid Howells extern void afs_put_vlocation(struct afs_vlocation *); 694fbb3fcbaSDavid Howells extern void afs_vlocation_purge(void); 69508e0e7c8SDavid Howells 69608e0e7c8SDavid Howells /* 69708e0e7c8SDavid Howells * vnode.c 69808e0e7c8SDavid Howells */ 69908e0e7c8SDavid Howells static inline struct afs_vnode *AFS_FS_I(struct inode *inode) 70008e0e7c8SDavid Howells { 70108e0e7c8SDavid Howells return container_of(inode, struct afs_vnode, vfs_inode); 70208e0e7c8SDavid Howells } 70308e0e7c8SDavid Howells 70408e0e7c8SDavid Howells static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) 70508e0e7c8SDavid Howells { 70608e0e7c8SDavid Howells return &vnode->vfs_inode; 70708e0e7c8SDavid Howells } 70808e0e7c8SDavid Howells 709260a9803SDavid Howells extern void afs_vnode_finalise_status_update(struct afs_vnode *, 710260a9803SDavid Howells struct afs_server *); 71100d3b7a4SDavid Howells extern int afs_vnode_fetch_status(struct afs_vnode *, struct afs_vnode *, 71200d3b7a4SDavid Howells struct key *); 71300d3b7a4SDavid Howells extern int afs_vnode_fetch_data(struct afs_vnode *, struct key *, 71400d3b7a4SDavid Howells off_t, size_t, struct page *); 715260a9803SDavid Howells extern int afs_vnode_create(struct afs_vnode *, struct key *, const char *, 716260a9803SDavid Howells umode_t, struct afs_fid *, struct afs_file_status *, 717260a9803SDavid Howells struct afs_callback *, struct afs_server **); 718260a9803SDavid Howells extern int afs_vnode_remove(struct afs_vnode *, struct key *, const char *, 719260a9803SDavid Howells bool); 720260a9803SDavid Howells extern int afs_vnode_link(struct afs_vnode *, struct afs_vnode *, struct key *, 721260a9803SDavid Howells const char *); 722260a9803SDavid Howells extern int afs_vnode_symlink(struct afs_vnode *, struct key *, const char *, 723260a9803SDavid Howells const char *, struct afs_fid *, 724260a9803SDavid Howells struct afs_file_status *, struct afs_server **); 725260a9803SDavid Howells extern int afs_vnode_rename(struct afs_vnode *, struct afs_vnode *, 726260a9803SDavid Howells struct key *, const char *, const char *); 72731143d5dSDavid Howells extern int afs_vnode_store_data(struct afs_writeback *, pgoff_t, pgoff_t, 72831143d5dSDavid Howells unsigned, unsigned); 72931143d5dSDavid Howells extern int afs_vnode_setattr(struct afs_vnode *, struct key *, struct iattr *); 73045222b9eSDavid Howells extern int afs_vnode_get_volume_status(struct afs_vnode *, struct key *, 73145222b9eSDavid Howells struct afs_volume_status *); 732e8d6c554SDavid Howells extern int afs_vnode_set_lock(struct afs_vnode *, struct key *, 733e8d6c554SDavid Howells afs_lock_type_t); 734e8d6c554SDavid Howells extern int afs_vnode_extend_lock(struct afs_vnode *, struct key *); 735e8d6c554SDavid Howells extern int afs_vnode_release_lock(struct afs_vnode *, struct key *); 73608e0e7c8SDavid Howells 73708e0e7c8SDavid Howells /* 73808e0e7c8SDavid Howells * volume.c 73908e0e7c8SDavid Howells */ 74008e0e7c8SDavid Howells #define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0) 74108e0e7c8SDavid Howells 74208e0e7c8SDavid Howells extern void afs_put_volume(struct afs_volume *); 74300d3b7a4SDavid Howells extern struct afs_volume *afs_volume_lookup(struct afs_mount_params *); 74408e0e7c8SDavid Howells extern struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *); 74508e0e7c8SDavid Howells extern int afs_volume_release_fileserver(struct afs_vnode *, 74608e0e7c8SDavid Howells struct afs_server *, int); 74708e0e7c8SDavid Howells 74831143d5dSDavid Howells /* 74931143d5dSDavid Howells * write.c 75031143d5dSDavid Howells */ 75131143d5dSDavid Howells extern int afs_set_page_dirty(struct page *); 75231143d5dSDavid Howells extern void afs_put_writeback(struct afs_writeback *); 75315b4650eSNick Piggin extern int afs_write_begin(struct file *file, struct address_space *mapping, 75415b4650eSNick Piggin loff_t pos, unsigned len, unsigned flags, 75515b4650eSNick Piggin struct page **pagep, void **fsdata); 75615b4650eSNick Piggin extern int afs_write_end(struct file *file, struct address_space *mapping, 75715b4650eSNick Piggin loff_t pos, unsigned len, unsigned copied, 75815b4650eSNick Piggin struct page *page, void *fsdata); 75931143d5dSDavid Howells extern int afs_writepage(struct page *, struct writeback_control *); 76031143d5dSDavid Howells extern int afs_writepages(struct address_space *, struct writeback_control *); 76131143d5dSDavid Howells extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *); 76250b5551dSAl Viro extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); 76331143d5dSDavid Howells extern int afs_writeback_all(struct afs_vnode *); 76402c24a82SJosef Bacik extern int afs_fsync(struct file *, loff_t, loff_t, int); 76531143d5dSDavid Howells 76631143d5dSDavid Howells 76708e0e7c8SDavid Howells /*****************************************************************************/ 76808e0e7c8SDavid Howells /* 76908e0e7c8SDavid Howells * debug tracing 77008e0e7c8SDavid Howells */ 77108e0e7c8SDavid Howells extern unsigned afs_debug; 77208e0e7c8SDavid Howells 77308e0e7c8SDavid Howells #define dbgprintk(FMT,...) \ 774ad16df84SSven Schnelle printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 77508e0e7c8SDavid Howells 776530b6412SHarvey Harrison #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 777530b6412SHarvey Harrison #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 77808e0e7c8SDavid Howells #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 77908e0e7c8SDavid Howells 78008e0e7c8SDavid Howells 78108e0e7c8SDavid Howells #if defined(__KDEBUG) 78208e0e7c8SDavid Howells #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 78308e0e7c8SDavid Howells #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 78408e0e7c8SDavid Howells #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 78508e0e7c8SDavid Howells 78608e0e7c8SDavid Howells #elif defined(CONFIG_AFS_DEBUG) 78708e0e7c8SDavid Howells #define AFS_DEBUG_KENTER 0x01 78808e0e7c8SDavid Howells #define AFS_DEBUG_KLEAVE 0x02 78908e0e7c8SDavid Howells #define AFS_DEBUG_KDEBUG 0x04 79008e0e7c8SDavid Howells 79108e0e7c8SDavid Howells #define _enter(FMT,...) \ 79208e0e7c8SDavid Howells do { \ 79308e0e7c8SDavid Howells if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ 79408e0e7c8SDavid Howells kenter(FMT,##__VA_ARGS__); \ 79508e0e7c8SDavid Howells } while (0) 79608e0e7c8SDavid Howells 79708e0e7c8SDavid Howells #define _leave(FMT,...) \ 79808e0e7c8SDavid Howells do { \ 79908e0e7c8SDavid Howells if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ 80008e0e7c8SDavid Howells kleave(FMT,##__VA_ARGS__); \ 80108e0e7c8SDavid Howells } while (0) 80208e0e7c8SDavid Howells 80308e0e7c8SDavid Howells #define _debug(FMT,...) \ 80408e0e7c8SDavid Howells do { \ 80508e0e7c8SDavid Howells if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ 80608e0e7c8SDavid Howells kdebug(FMT,##__VA_ARGS__); \ 80708e0e7c8SDavid Howells } while (0) 80808e0e7c8SDavid Howells 80908e0e7c8SDavid Howells #else 81012fdff3fSDavid Howells #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 81112fdff3fSDavid Howells #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 81212fdff3fSDavid Howells #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 81308e0e7c8SDavid Howells #endif 81408e0e7c8SDavid Howells 81508e0e7c8SDavid Howells /* 81608e0e7c8SDavid Howells * debug assertion checking 81708e0e7c8SDavid Howells */ 81808e0e7c8SDavid Howells #if 1 // defined(__KDEBUGALL) 81908e0e7c8SDavid Howells 82008e0e7c8SDavid Howells #define ASSERT(X) \ 82108e0e7c8SDavid Howells do { \ 82208e0e7c8SDavid Howells if (unlikely(!(X))) { \ 82308e0e7c8SDavid Howells printk(KERN_ERR "\n"); \ 82408e0e7c8SDavid Howells printk(KERN_ERR "AFS: Assertion failed\n"); \ 82508e0e7c8SDavid Howells BUG(); \ 82608e0e7c8SDavid Howells } \ 82708e0e7c8SDavid Howells } while(0) 82808e0e7c8SDavid Howells 82908e0e7c8SDavid Howells #define ASSERTCMP(X, OP, Y) \ 83008e0e7c8SDavid Howells do { \ 83108e0e7c8SDavid Howells if (unlikely(!((X) OP (Y)))) { \ 83208e0e7c8SDavid Howells printk(KERN_ERR "\n"); \ 83308e0e7c8SDavid Howells printk(KERN_ERR "AFS: Assertion failed\n"); \ 83408e0e7c8SDavid Howells printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 83508e0e7c8SDavid Howells (unsigned long)(X), (unsigned long)(Y)); \ 83608e0e7c8SDavid Howells printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 83708e0e7c8SDavid Howells (unsigned long)(X), (unsigned long)(Y)); \ 83808e0e7c8SDavid Howells BUG(); \ 83908e0e7c8SDavid Howells } \ 84008e0e7c8SDavid Howells } while(0) 84108e0e7c8SDavid Howells 842416351f2SDavid Howells #define ASSERTRANGE(L, OP1, N, OP2, H) \ 843416351f2SDavid Howells do { \ 844416351f2SDavid Howells if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ 845416351f2SDavid Howells printk(KERN_ERR "\n"); \ 846416351f2SDavid Howells printk(KERN_ERR "AFS: Assertion failed\n"); \ 847416351f2SDavid Howells printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ 848416351f2SDavid Howells (unsigned long)(L), (unsigned long)(N), \ 849416351f2SDavid Howells (unsigned long)(H)); \ 850416351f2SDavid Howells printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ 851416351f2SDavid Howells (unsigned long)(L), (unsigned long)(N), \ 852416351f2SDavid Howells (unsigned long)(H)); \ 853416351f2SDavid Howells BUG(); \ 854416351f2SDavid Howells } \ 855416351f2SDavid Howells } while(0) 856416351f2SDavid Howells 85708e0e7c8SDavid Howells #define ASSERTIF(C, X) \ 85808e0e7c8SDavid Howells do { \ 85908e0e7c8SDavid Howells if (unlikely((C) && !(X))) { \ 86008e0e7c8SDavid Howells printk(KERN_ERR "\n"); \ 86108e0e7c8SDavid Howells printk(KERN_ERR "AFS: Assertion failed\n"); \ 86208e0e7c8SDavid Howells BUG(); \ 86308e0e7c8SDavid Howells } \ 86408e0e7c8SDavid Howells } while(0) 86508e0e7c8SDavid Howells 86608e0e7c8SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 86708e0e7c8SDavid Howells do { \ 86808e0e7c8SDavid Howells if (unlikely((C) && !((X) OP (Y)))) { \ 86908e0e7c8SDavid Howells printk(KERN_ERR "\n"); \ 87008e0e7c8SDavid Howells printk(KERN_ERR "AFS: Assertion failed\n"); \ 87108e0e7c8SDavid Howells printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 87208e0e7c8SDavid Howells (unsigned long)(X), (unsigned long)(Y)); \ 87308e0e7c8SDavid Howells printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 87408e0e7c8SDavid Howells (unsigned long)(X), (unsigned long)(Y)); \ 87508e0e7c8SDavid Howells BUG(); \ 87608e0e7c8SDavid Howells } \ 87708e0e7c8SDavid Howells } while(0) 87808e0e7c8SDavid Howells 87908e0e7c8SDavid Howells #else 88008e0e7c8SDavid Howells 88108e0e7c8SDavid Howells #define ASSERT(X) \ 88208e0e7c8SDavid Howells do { \ 88308e0e7c8SDavid Howells } while(0) 88408e0e7c8SDavid Howells 88508e0e7c8SDavid Howells #define ASSERTCMP(X, OP, Y) \ 88608e0e7c8SDavid Howells do { \ 88708e0e7c8SDavid Howells } while(0) 88808e0e7c8SDavid Howells 889416351f2SDavid Howells #define ASSERTRANGE(L, OP1, N, OP2, H) \ 890416351f2SDavid Howells do { \ 891416351f2SDavid Howells } while(0) 892416351f2SDavid Howells 89308e0e7c8SDavid Howells #define ASSERTIF(C, X) \ 89408e0e7c8SDavid Howells do { \ 89508e0e7c8SDavid Howells } while(0) 89608e0e7c8SDavid Howells 89708e0e7c8SDavid Howells #define ASSERTIFCMP(C, X, OP, Y) \ 89808e0e7c8SDavid Howells do { \ 89908e0e7c8SDavid Howells } while(0) 90008e0e7c8SDavid Howells 90108e0e7c8SDavid Howells #endif /* __KDEBUGALL */ 902