| /* internal AFS stuff |
| * |
| * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved. |
| * Written by David Howells (dhowells@redhat.com) |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| |
| #include <linux/compiler.h> |
| #include <linux/kernel.h> |
| #include <linux/fs.h> |
| #include <linux/pagemap.h> |
| #include <linux/rxrpc.h> |
| #include <linux/key.h> |
| #include <linux/workqueue.h> |
| #include <linux/sched.h> |
| #include <linux/fscache.h> |
| #include <linux/backing-dev.h> |
| #include <linux/uuid.h> |
| #include <net/af_rxrpc.h> |
| |
| #include "afs.h" |
| #include "afs_vl.h" |
| |
| #define AFS_CELL_MAX_ADDRS 15 |
| |
| struct pagevec; |
| struct afs_call; |
| |
| typedef enum { |
| AFS_VL_NEW, /* new, uninitialised record */ |
| AFS_VL_CREATING, /* creating record */ |
| AFS_VL_VALID, /* record is pending */ |
| AFS_VL_NO_VOLUME, /* no such volume available */ |
| AFS_VL_UPDATING, /* update in progress */ |
| AFS_VL_VOLUME_DELETED, /* volume was deleted */ |
| AFS_VL_UNCERTAIN, /* uncertain state (update failed) */ |
| } __attribute__((packed)) afs_vlocation_state_t; |
| |
| struct afs_mount_params { |
| bool rwpath; /* T if the parent should be considered R/W */ |
| bool force; /* T to force cell type */ |
| bool autocell; /* T if set auto mount operation */ |
| afs_voltype_t type; /* type of volume requested */ |
| int volnamesz; /* size of volume name */ |
| const char *volname; /* name of volume to mount */ |
| struct afs_cell *cell; /* cell in which to find volume */ |
| struct afs_volume *volume; /* volume record */ |
| struct key *key; /* key to use for secure mounting */ |
| }; |
| |
| enum afs_call_state { |
| AFS_CALL_REQUESTING, /* request is being sent for outgoing call */ |
| AFS_CALL_AWAIT_REPLY, /* awaiting reply to outgoing call */ |
| AFS_CALL_AWAIT_OP_ID, /* awaiting op ID on incoming call */ |
| AFS_CALL_AWAIT_REQUEST, /* awaiting request data on incoming call */ |
| AFS_CALL_REPLYING, /* replying to incoming call */ |
| AFS_CALL_AWAIT_ACK, /* awaiting final ACK of incoming call */ |
| AFS_CALL_COMPLETE, /* Completed or failed */ |
| }; |
| /* |
| * a record of an in-progress RxRPC call |
| */ |
| struct afs_call { |
| const struct afs_call_type *type; /* type of call */ |
| wait_queue_head_t waitq; /* processes awaiting completion */ |
| struct work_struct async_work; /* async I/O processor */ |
| struct work_struct work; /* actual work processor */ |
| struct rxrpc_call *rxcall; /* RxRPC call handle */ |
| struct key *key; /* security for this call */ |
| struct afs_server *server; /* server affected by incoming CM call */ |
| void *request; /* request data (first part) */ |
| struct address_space *mapping; /* page set */ |
| struct afs_writeback *wb; /* writeback being performed */ |
| void *buffer; /* reply receive buffer */ |
| void *reply; /* reply buffer (first part) */ |
| void *reply2; /* reply buffer (second part) */ |
| void *reply3; /* reply buffer (third part) */ |
| void *reply4; /* reply buffer (fourth part) */ |
| pgoff_t first; /* first page in mapping to deal with */ |
| pgoff_t last; /* last page in mapping to deal with */ |
| size_t offset; /* offset into received data store */ |
| atomic_t usage; |
| enum afs_call_state state; |
| int error; /* error code */ |
| u32 abort_code; /* Remote abort ID or 0 */ |
| unsigned request_size; /* size of request data */ |
| unsigned reply_max; /* maximum size of reply */ |
| unsigned first_offset; /* offset into mapping[first] */ |
| union { |
| unsigned last_to; /* amount of mapping[last] */ |
| unsigned count2; /* count used in unmarshalling */ |
| }; |
| unsigned char unmarshall; /* unmarshalling phase */ |
| bool incoming; /* T if incoming call */ |
| bool send_pages; /* T if data from mapping should be sent */ |
| bool need_attention; /* T if RxRPC poked us */ |
| bool async; /* T if asynchronous */ |
| u16 service_id; /* RxRPC service ID to call */ |
| __be16 port; /* target UDP port */ |
| u32 operation_ID; /* operation ID for an incoming call */ |
| u32 count; /* count for use in unmarshalling */ |
| __be32 tmp; /* place to extract temporary data */ |
| afs_dataversion_t store_version; /* updated version expected from store */ |
| }; |
| |
| struct afs_call_type { |
| const char *name; |
| |
| /* deliver request or reply data to an call |
| * - returning an error will cause the call to be aborted |
| */ |
| int (*deliver)(struct afs_call *call); |
| |
| /* map an abort code to an error number */ |
| int (*abort_to_error)(u32 abort_code); |
| |
| /* clean up a call */ |
| void (*destructor)(struct afs_call *call); |
| |
| /* Work function */ |
| void (*work)(struct work_struct *work); |
| }; |
| |
| /* |
| * Record of an outstanding read operation on a vnode. |
| */ |
| struct afs_read { |
| loff_t pos; /* Where to start reading */ |
| loff_t len; /* How much we're asking for */ |
| loff_t actual_len; /* How much we're actually getting */ |
| atomic_t usage; |
| unsigned int remain; /* Amount remaining */ |
| unsigned int index; /* Which page we're reading into */ |
| unsigned int nr_pages; |
| void (*page_done)(struct afs_call *, struct afs_read *); |
| struct page *pages[]; |
| }; |
| |
| /* |
| * record of an outstanding writeback on a vnode |
| */ |
| struct afs_writeback { |
| struct list_head link; /* link in vnode->writebacks */ |
| struct work_struct writer; /* work item to perform the writeback */ |
| struct afs_vnode *vnode; /* vnode to which this write applies */ |
| struct key *key; /* owner of this write */ |
| wait_queue_head_t waitq; /* completion and ready wait queue */ |
| pgoff_t first; /* first page in batch */ |
| pgoff_t point; /* last page in current store op */ |
| pgoff_t last; /* last page in batch (inclusive) */ |
| unsigned offset_first; /* offset into first page of start of write */ |
| unsigned to_last; /* offset into last page of end of write */ |
| int num_conflicts; /* count of conflicting writes in list */ |
| int usage; |
| bool conflicts; /* T if has dependent conflicts */ |
| enum { |
| AFS_WBACK_SYNCING, /* synchronisation being performed */ |
| AFS_WBACK_PENDING, /* write pending */ |
| AFS_WBACK_CONFLICTING, /* conflicting writes posted */ |
| AFS_WBACK_WRITING, /* writing back */ |
| AFS_WBACK_COMPLETE /* the writeback record has been unlinked */ |
| } state __attribute__((packed)); |
| }; |
| |
| /* |
| * AFS superblock private data |
| * - there's one superblock per volume |
| */ |
| struct afs_super_info { |
| struct afs_volume *volume; /* volume record */ |
| char rwparent; /* T if parent is R/W AFS volume */ |
| }; |
| |
| static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) |
| { |
| return sb->s_fs_info; |
| } |
| |
| extern struct file_system_type afs_fs_type; |
| |
| /* |
| * entry in the cached cell catalogue |
| */ |
| struct afs_cache_cell { |
| char name[AFS_MAXCELLNAME]; /* cell name (padded with NULs) */ |
| struct in_addr vl_servers[15]; /* cached cell VL servers */ |
| }; |
| |
| /* |
| * AFS cell record |
| */ |
| struct afs_cell { |
| atomic_t usage; |
| struct list_head link; /* main cell list link */ |
| struct key *anonymous_key; /* anonymous user key for this cell */ |
| struct list_head proc_link; /* /proc cell list link */ |
| #ifdef CONFIG_AFS_FSCACHE |
| struct fscache_cookie *cache; /* caching cookie */ |
| #endif |
| |
| /* server record management */ |
| rwlock_t servers_lock; /* active server list lock */ |
| struct list_head servers; /* active server list */ |
| |
| /* volume location record management */ |
| struct rw_semaphore vl_sem; /* volume management serialisation semaphore */ |
| struct list_head vl_list; /* cell's active VL record list */ |
| spinlock_t vl_lock; /* vl_list lock */ |
| unsigned short vl_naddrs; /* number of VL servers in addr list */ |
| unsigned short vl_curr_svix; /* current server index */ |
| struct in_addr vl_addrs[AFS_CELL_MAX_ADDRS]; /* cell VL server addresses */ |
| |
| char name[0]; /* cell name - must go last */ |
| }; |
| |
| /* |
| * entry in the cached volume location catalogue |
| */ |
| struct afs_cache_vlocation { |
| /* volume name (lowercase, padded with NULs) */ |
| uint8_t name[AFS_MAXVOLNAME + 1]; |
| |
| uint8_t nservers; /* number of entries used in servers[] */ |
| uint8_t vidmask; /* voltype mask for vid[] */ |
| uint8_t srvtmask[8]; /* voltype masks for servers[] */ |
| #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ |
| #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ |
| #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ |
| |
| afs_volid_t vid[3]; /* volume IDs for R/W, R/O and Bak volumes */ |
| struct in_addr servers[8]; /* fileserver addresses */ |
| time_t rtime; /* last retrieval time */ |
| }; |
| |
| /* |
| * volume -> vnode hash table entry |
| */ |
| struct afs_cache_vhash { |
| afs_voltype_t vtype; /* which volume variation */ |
| uint8_t hash_bucket; /* which hash bucket this represents */ |
| } __attribute__((packed)); |
| |
| /* |
| * AFS volume location record |
| */ |
| struct afs_vlocation { |
| atomic_t usage; |
| time_t time_of_death; /* time at which put reduced usage to 0 */ |
| struct list_head link; /* link in cell volume location list */ |
| struct list_head grave; /* link in master graveyard list */ |
| struct list_head update; /* link in master update list */ |
| struct afs_cell *cell; /* cell to which volume belongs */ |
| #ifdef CONFIG_AFS_FSCACHE |
| struct fscache_cookie *cache; /* caching cookie */ |
| #endif |
| struct afs_cache_vlocation vldb; /* volume information DB record */ |
| struct afs_volume *vols[3]; /* volume access record pointer (index by type) */ |
| wait_queue_head_t waitq; /* status change waitqueue */ |
| time_t update_at; /* time at which record should be updated */ |
| spinlock_t lock; /* access lock */ |
| afs_vlocation_state_t state; /* volume location state */ |
| unsigned short upd_rej_cnt; /* ENOMEDIUM count during update */ |
| unsigned short upd_busy_cnt; /* EBUSY count during update */ |
| bool valid; /* T if valid */ |
| }; |
| |
| /* |
| * AFS fileserver record |
| */ |
| struct afs_server { |
| atomic_t usage; |
| time_t time_of_death; /* time at which put reduced usage to 0 */ |
| struct in_addr addr; /* server address */ |
| struct afs_cell *cell; /* cell in which server resides */ |
| struct list_head link; /* link in cell's server list */ |
| struct list_head grave; /* link in master graveyard list */ |
| struct rb_node master_rb; /* link in master by-addr tree */ |
| struct rw_semaphore sem; /* access lock */ |
| |
| /* file service access */ |
| struct rb_root fs_vnodes; /* vnodes backed by this server (ordered by FID) */ |
| unsigned long fs_act_jif; /* time at which last activity occurred */ |
| unsigned long fs_dead_jif; /* time at which no longer to be considered dead */ |
| spinlock_t fs_lock; /* access lock */ |
| int fs_state; /* 0 or reason FS currently marked dead (-errno) */ |
| |
| /* callback promise management */ |
| struct rb_root cb_promises; /* vnode expiration list (ordered earliest first) */ |
| struct delayed_work cb_updater; /* callback updater */ |
| struct delayed_work cb_break_work; /* collected break dispatcher */ |
| wait_queue_head_t cb_break_waitq; /* space available in cb_break waitqueue */ |
| spinlock_t cb_lock; /* access lock */ |
| struct afs_callback cb_break[64]; /* ring of callbacks awaiting breaking */ |
| atomic_t cb_break_n; /* number of pending breaks */ |
| u8 cb_break_head; /* head of callback breaking ring */ |
| u8 cb_break_tail; /* tail of callback breaking ring */ |
| }; |
| |
| /* |
| * AFS volume access record |
| */ |
| struct afs_volume { |
| atomic_t usage; |
| struct afs_cell *cell; /* cell to which belongs (unrefd ptr) */ |
| struct afs_vlocation *vlocation; /* volume location */ |
| #ifdef CONFIG_AFS_FSCACHE |
| struct fscache_cookie *cache; /* caching cookie */ |
| #endif |
| afs_volid_t vid; /* volume ID */ |
| afs_voltype_t type; /* type of volume */ |
| char type_force; /* force volume type (suppress R/O -> R/W) */ |
| unsigned short nservers; /* number of server slots filled */ |
| unsigned short rjservers; /* number of servers discarded due to -ENOMEDIUM */ |
| struct afs_server *servers[8]; /* servers on which volume resides (ordered) */ |
| struct rw_semaphore server_sem; /* lock for accessing current server */ |
| struct backing_dev_info bdi; |
| }; |
| |
| /* |
| * vnode catalogue entry |
| */ |
| struct afs_cache_vnode { |
| afs_vnodeid_t vnode_id; /* vnode ID */ |
| unsigned vnode_unique; /* vnode ID uniquifier */ |
| afs_dataversion_t data_version; /* data version */ |
| }; |
| |
| /* |
| * AFS inode private data |
| */ |
| struct afs_vnode { |
| struct inode vfs_inode; /* the VFS's inode record */ |
| |
| struct afs_volume *volume; /* volume on which vnode resides */ |
| struct afs_server *server; /* server currently supplying this file */ |
| struct afs_fid fid; /* the file identifier for this inode */ |
| struct afs_file_status status; /* AFS status info for this file */ |
| #ifdef CONFIG_AFS_FSCACHE |
| struct fscache_cookie *cache; /* caching cookie */ |
| #endif |
| struct afs_permits *permits; /* cache of permits so far obtained */ |
| struct mutex permits_lock; /* lock for altering permits list */ |
| struct mutex validate_lock; /* lock for validating this vnode */ |
| wait_queue_head_t update_waitq; /* status fetch waitqueue */ |
| int update_cnt; /* number of outstanding ops that will update the |
| * status */ |
| spinlock_t writeback_lock; /* lock for writebacks */ |
| spinlock_t lock; /* waitqueue/flags lock */ |
| unsigned long flags; |
| #define AFS_VNODE_CB_BROKEN 0 /* set if vnode's callback was broken */ |
| #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ |
| #define AFS_VNODE_MODIFIED 2 /* set if vnode's data modified */ |
| #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ |
| #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ |
| #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ |
| #define AFS_VNODE_LOCKING 6 /* set if waiting for lock on vnode */ |
| #define AFS_VNODE_READLOCKED 7 /* set if vnode is read-locked on the server */ |
| #define AFS_VNODE_WRITELOCKED 8 /* set if vnode is write-locked on the server */ |
| #define AFS_VNODE_UNLOCKING 9 /* set if vnode is being unlocked on the server */ |
| #define AFS_VNODE_AUTOCELL 10 /* set if Vnode is an auto mount point */ |
| #define AFS_VNODE_PSEUDODIR 11 /* set if Vnode is a pseudo directory */ |
| |
| long acl_order; /* ACL check count (callback break count) */ |
| |
| struct list_head writebacks; /* alterations in pagecache that need writing */ |
| struct list_head pending_locks; /* locks waiting to be granted */ |
| struct list_head granted_locks; /* locks granted on this file */ |
| struct delayed_work lock_work; /* work to be done in locking */ |
| struct key *unlock_key; /* key to be used in unlocking */ |
| |
| /* outstanding callback notification on this file */ |
| struct rb_node server_rb; /* link in server->fs_vnodes */ |
| struct rb_node cb_promise; /* link in server->cb_promises */ |
| struct work_struct cb_broken_work; /* work to be done on callback break */ |
| time_t cb_expires; /* time at which callback expires */ |
| time_t cb_expires_at; /* time used to order cb_promise */ |
| unsigned cb_version; /* callback version */ |
| unsigned cb_expiry; /* callback expiry time */ |
| afs_callback_type_t cb_type; /* type of callback */ |
| bool cb_promised; /* true if promise still holds */ |
| }; |
| |
| /* |
| * cached security record for one user's attempt to access a vnode |
| */ |
| struct afs_permit { |
| struct key *key; /* RxRPC ticket holding a security context */ |
| afs_access_t access_mask; /* access mask for this key */ |
| }; |
| |
| /* |
| * cache of security records from attempts to access a vnode |
| */ |
| struct afs_permits { |
| struct rcu_head rcu; /* disposal procedure */ |
| int count; /* number of records */ |
| struct afs_permit permits[0]; /* the permits so far examined */ |
| }; |
| |
| /* |
| * record of one of a system's set of network interfaces |
| */ |
| struct afs_interface { |
| struct in_addr address; /* IPv4 address bound to interface */ |
| struct in_addr netmask; /* netmask applied to address */ |
| unsigned mtu; /* MTU of interface */ |
| }; |
| |
| /*****************************************************************************/ |
| /* |
| * cache.c |
| */ |
| #ifdef CONFIG_AFS_FSCACHE |
| extern struct fscache_netfs afs_cache_netfs; |
| extern struct fscache_cookie_def afs_cell_cache_index_def; |
| extern struct fscache_cookie_def afs_vlocation_cache_index_def; |
| extern struct fscache_cookie_def afs_volume_cache_index_def; |
| extern struct fscache_cookie_def afs_vnode_cache_index_def; |
| #else |
| #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL) |
| #define afs_vlocation_cache_index_def (*(struct fscache_cookie_def *) NULL) |
| #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL) |
| #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL) |
| #endif |
| |
| /* |
| * callback.c |
| */ |
| extern void afs_init_callback_state(struct afs_server *); |
| extern void afs_broken_callback_work(struct work_struct *); |
| extern void afs_break_callbacks(struct afs_server *, size_t, |
| struct afs_callback[]); |
| extern void afs_discard_callback_on_delete(struct afs_vnode *); |
| extern void afs_give_up_callback(struct afs_vnode *); |
| extern void afs_dispatch_give_up_callbacks(struct work_struct *); |
| extern void afs_flush_callback_breaks(struct afs_server *); |
| extern int __init afs_callback_update_init(void); |
| extern void afs_callback_update_kill(void); |
| |
| /* |
| * cell.c |
| */ |
| extern struct rw_semaphore afs_proc_cells_sem; |
| extern struct list_head afs_proc_cells; |
| |
| #define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0) |
| extern int afs_cell_init(char *); |
| extern struct afs_cell *afs_cell_create(const char *, unsigned, char *, bool); |
| extern struct afs_cell *afs_cell_lookup(const char *, unsigned, bool); |
| extern struct afs_cell *afs_grab_cell(struct afs_cell *); |
| extern void afs_put_cell(struct afs_cell *); |
| extern void afs_cell_purge(void); |
| |
| /* |
| * cmservice.c |
| */ |
| extern bool afs_cm_incoming_call(struct afs_call *); |
| |
| /* |
| * dir.c |
| */ |
| extern const struct inode_operations afs_dir_inode_operations; |
| extern const struct dentry_operations afs_fs_dentry_operations; |
| extern const struct file_operations afs_dir_file_operations; |
| |
| /* |
| * file.c |
| */ |
| extern const struct address_space_operations afs_fs_aops; |
| extern const struct inode_operations afs_file_inode_operations; |
| extern const struct file_operations afs_file_operations; |
| |
| extern int afs_open(struct inode *, struct file *); |
| extern int afs_release(struct inode *, struct file *); |
| extern int afs_page_filler(void *, struct page *); |
| extern void afs_put_read(struct afs_read *); |
| |
| /* |
| * flock.c |
| */ |
| extern void __exit afs_kill_lock_manager(void); |
| extern void afs_lock_work(struct work_struct *); |
| extern void afs_lock_may_be_available(struct afs_vnode *); |
| extern int afs_lock(struct file *, int, struct file_lock *); |
| extern int afs_flock(struct file *, int, struct file_lock *); |
| |
| /* |
| * fsclient.c |
| */ |
| extern int afs_fs_fetch_file_status(struct afs_server *, struct key *, |
| struct afs_vnode *, struct afs_volsync *, |
| bool); |
| extern int afs_fs_give_up_callbacks(struct afs_server *, bool); |
| extern int afs_fs_fetch_data(struct afs_server *, struct key *, |
| struct afs_vnode *, struct afs_read *, bool); |
| extern int afs_fs_create(struct afs_server *, struct key *, |
| struct afs_vnode *, const char *, umode_t, |
| struct afs_fid *, struct afs_file_status *, |
| struct afs_callback *, bool); |
| extern int afs_fs_remove(struct afs_server *, struct key *, |
| struct afs_vnode *, const char *, bool, bool); |
| extern int afs_fs_link(struct afs_server *, struct key *, struct afs_vnode *, |
| struct afs_vnode *, const char *, bool); |
| extern int afs_fs_symlink(struct afs_server *, struct key *, |
| struct afs_vnode *, const char *, const char *, |
| struct afs_fid *, struct afs_file_status *, bool); |
| extern int afs_fs_rename(struct afs_server *, struct key *, |
| struct afs_vnode *, const char *, |
| struct afs_vnode *, const char *, bool); |
| extern int afs_fs_store_data(struct afs_server *, struct afs_writeback *, |
| pgoff_t, pgoff_t, unsigned, unsigned, bool); |
| extern int afs_fs_setattr(struct afs_server *, struct key *, |
| struct afs_vnode *, struct iattr *, bool); |
| extern int afs_fs_get_volume_status(struct afs_server *, struct key *, |
| struct afs_vnode *, |
| struct afs_volume_status *, bool); |
| extern int afs_fs_set_lock(struct afs_server *, struct key *, |
| struct afs_vnode *, afs_lock_type_t, bool); |
| extern int afs_fs_extend_lock(struct afs_server *, struct key *, |
| struct afs_vnode *, bool); |
| extern int afs_fs_release_lock(struct afs_server *, struct key *, |
| struct afs_vnode *, bool); |
| |
| /* |
| * inode.c |
| */ |
| extern struct inode *afs_iget_autocell(struct inode *, const char *, int, |
| struct key *); |
| extern struct inode *afs_iget(struct super_block *, struct key *, |
| struct afs_fid *, struct afs_file_status *, |
| struct afs_callback *); |
| extern void afs_zap_data(struct afs_vnode *); |
| extern int afs_validate(struct afs_vnode *, struct key *); |
| extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int); |
| extern int afs_setattr(struct dentry *, struct iattr *); |
| extern void afs_evict_inode(struct inode *); |
| extern int afs_drop_inode(struct inode *); |
| |
| /* |
| * main.c |
| */ |
| extern struct workqueue_struct *afs_wq; |
| extern struct uuid_v1 afs_uuid; |
| |
| /* |
| * misc.c |
| */ |
| extern int afs_abort_to_error(u32); |
| |
| /* |
| * mntpt.c |
| */ |
| extern const struct inode_operations afs_mntpt_inode_operations; |
| extern const struct inode_operations afs_autocell_inode_operations; |
| extern const struct file_operations afs_mntpt_file_operations; |
| |
| extern struct vfsmount *afs_d_automount(struct path *); |
| extern int afs_mntpt_check_symlink(struct afs_vnode *, struct key *); |
| extern void afs_mntpt_kill_timer(void); |
| |
| /* |
| * netdevices.c |
| */ |
| extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool); |
| |
| /* |
| * proc.c |
| */ |
| extern int afs_proc_init(void); |
| extern void afs_proc_cleanup(void); |
| extern int afs_proc_cell_setup(struct afs_cell *); |
| extern void afs_proc_cell_remove(struct afs_cell *); |
| |
| /* |
| * rxrpc.c |
| */ |
| extern struct socket *afs_socket; |
| extern atomic_t afs_outstanding_calls; |
| |
| extern int afs_open_socket(void); |
| extern void afs_close_socket(void); |
| extern void afs_put_call(struct afs_call *); |
| extern int afs_queue_call_work(struct afs_call *); |
| extern int afs_make_call(struct in_addr *, struct afs_call *, gfp_t, bool); |
| extern struct afs_call *afs_alloc_flat_call(const struct afs_call_type *, |
| size_t, size_t); |
| extern void afs_flat_call_destructor(struct afs_call *); |
| extern void afs_send_empty_reply(struct afs_call *); |
| extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); |
| extern int afs_extract_data(struct afs_call *, void *, size_t, bool); |
| |
| static inline int afs_transfer_reply(struct afs_call *call) |
| { |
| return afs_extract_data(call, call->buffer, call->reply_max, false); |
| } |
| |
| /* |
| * security.c |
| */ |
| extern void afs_clear_permits(struct afs_vnode *); |
| extern void afs_cache_permit(struct afs_vnode *, struct key *, long); |
| extern void afs_zap_permits(struct rcu_head *); |
| extern struct key *afs_request_key(struct afs_cell *); |
| extern int afs_permission(struct inode *, int); |
| |
| /* |
| * server.c |
| */ |
| extern spinlock_t afs_server_peer_lock; |
| |
| #define afs_get_server(S) \ |
| do { \ |
| _debug("GET SERVER %d", atomic_read(&(S)->usage)); \ |
| atomic_inc(&(S)->usage); \ |
| } while(0) |
| |
| extern struct afs_server *afs_lookup_server(struct afs_cell *, |
| const struct in_addr *); |
| extern struct afs_server *afs_find_server(const struct sockaddr_rxrpc *); |
| extern void afs_put_server(struct afs_server *); |
| extern void __exit afs_purge_servers(void); |
| |
| /* |
| * super.c |
| */ |
| extern int afs_fs_init(void); |
| extern void afs_fs_exit(void); |
| |
| /* |
| * vlclient.c |
| */ |
| extern int afs_vl_get_entry_by_name(struct in_addr *, struct key *, |
| const char *, struct afs_cache_vlocation *, |
| bool); |
| extern int afs_vl_get_entry_by_id(struct in_addr *, struct key *, |
| afs_volid_t, afs_voltype_t, |
| struct afs_cache_vlocation *, bool); |
| |
| /* |
| * vlocation.c |
| */ |
| #define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0) |
| |
| extern int __init afs_vlocation_update_init(void); |
| extern struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *, |
| struct key *, |
| const char *, size_t); |
| extern void afs_put_vlocation(struct afs_vlocation *); |
| extern void afs_vlocation_purge(void); |
| |
| /* |
| * vnode.c |
| */ |
| static inline struct afs_vnode *AFS_FS_I(struct inode *inode) |
| { |
| return container_of(inode, struct afs_vnode, vfs_inode); |
| } |
| |
| static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) |
| { |
| return &vnode->vfs_inode; |
| } |
| |
| extern void afs_vnode_finalise_status_update(struct afs_vnode *, |
| struct afs_server *); |
| extern int afs_vnode_fetch_status(struct afs_vnode *, struct afs_vnode *, |
| struct key *); |
| extern int afs_vnode_fetch_data(struct afs_vnode *, struct key *, |
| struct afs_read *); |
| extern int afs_vnode_create(struct afs_vnode *, struct key *, const char *, |
| umode_t, struct afs_fid *, struct afs_file_status *, |
| struct afs_callback *, struct afs_server **); |
| extern int afs_vnode_remove(struct afs_vnode *, struct key *, const char *, |
| bool); |
| extern int afs_vnode_link(struct afs_vnode *, struct afs_vnode *, struct key *, |
| const char *); |
| extern int afs_vnode_symlink(struct afs_vnode *, struct key *, const char *, |
| const char *, struct afs_fid *, |
| struct afs_file_status *, struct afs_server **); |
| extern int afs_vnode_rename(struct afs_vnode *, struct afs_vnode *, |
| struct key *, const char *, const char *); |
| extern int afs_vnode_store_data(struct afs_writeback *, pgoff_t, pgoff_t, |
| unsigned, unsigned); |
| extern int afs_vnode_setattr(struct afs_vnode *, struct key *, struct iattr *); |
| extern int afs_vnode_get_volume_status(struct afs_vnode *, struct key *, |
| struct afs_volume_status *); |
| extern int afs_vnode_set_lock(struct afs_vnode *, struct key *, |
| afs_lock_type_t); |
| extern int afs_vnode_extend_lock(struct afs_vnode *, struct key *); |
| extern int afs_vnode_release_lock(struct afs_vnode *, struct key *); |
| |
| /* |
| * volume.c |
| */ |
| #define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0) |
| |
| extern void afs_put_volume(struct afs_volume *); |
| extern struct afs_volume *afs_volume_lookup(struct afs_mount_params *); |
| extern struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *); |
| extern int afs_volume_release_fileserver(struct afs_vnode *, |
| struct afs_server *, int); |
| |
| /* |
| * write.c |
| */ |
| extern int afs_set_page_dirty(struct page *); |
| extern void afs_put_writeback(struct afs_writeback *); |
| extern int afs_write_begin(struct file *file, struct address_space *mapping, |
| loff_t pos, unsigned len, unsigned flags, |
| struct page **pagep, void **fsdata); |
| extern int afs_write_end(struct file *file, struct address_space *mapping, |
| loff_t pos, unsigned len, unsigned copied, |
| struct page *page, void *fsdata); |
| extern int afs_writepage(struct page *, struct writeback_control *); |
| extern int afs_writepages(struct address_space *, struct writeback_control *); |
| extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *); |
| extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); |
| extern int afs_writeback_all(struct afs_vnode *); |
| extern int afs_flush(struct file *, fl_owner_t); |
| extern int afs_fsync(struct file *, loff_t, loff_t, int); |
| |
| |
| /*****************************************************************************/ |
| /* |
| * debug tracing |
| */ |
| #include <trace/events/afs.h> |
| |
| extern unsigned afs_debug; |
| |
| #define dbgprintk(FMT,...) \ |
| printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
| |
| #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
| #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) |
| #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
| |
| |
| #if defined(__KDEBUG) |
| #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) |
| #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) |
| #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) |
| |
| #elif defined(CONFIG_AFS_DEBUG) |
| #define AFS_DEBUG_KENTER 0x01 |
| #define AFS_DEBUG_KLEAVE 0x02 |
| #define AFS_DEBUG_KDEBUG 0x04 |
| |
| #define _enter(FMT,...) \ |
| do { \ |
| if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ |
| kenter(FMT,##__VA_ARGS__); \ |
| } while (0) |
| |
| #define _leave(FMT,...) \ |
| do { \ |
| if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ |
| kleave(FMT,##__VA_ARGS__); \ |
| } while (0) |
| |
| #define _debug(FMT,...) \ |
| do { \ |
| if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ |
| kdebug(FMT,##__VA_ARGS__); \ |
| } while (0) |
| |
| #else |
| #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
| #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) |
| #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) |
| #endif |
| |
| /* |
| * debug assertion checking |
| */ |
| #if 1 // defined(__KDEBUGALL) |
| |
| #define ASSERT(X) \ |
| do { \ |
| if (unlikely(!(X))) { \ |
| printk(KERN_ERR "\n"); \ |
| printk(KERN_ERR "AFS: Assertion failed\n"); \ |
| BUG(); \ |
| } \ |
| } while(0) |
| |
| #define ASSERTCMP(X, OP, Y) \ |
| do { \ |
| if (unlikely(!((X) OP (Y)))) { \ |
| printk(KERN_ERR "\n"); \ |
| printk(KERN_ERR "AFS: Assertion failed\n"); \ |
| printk(KERN_ERR "%lu " #OP " %lu is false\n", \ |
| (unsigned long)(X), (unsigned long)(Y)); \ |
| printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ |
| (unsigned long)(X), (unsigned long)(Y)); \ |
| BUG(); \ |
| } \ |
| } while(0) |
| |
| #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
| do { \ |
| if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ |
| printk(KERN_ERR "\n"); \ |
| printk(KERN_ERR "AFS: Assertion failed\n"); \ |
| printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ |
| (unsigned long)(L), (unsigned long)(N), \ |
| (unsigned long)(H)); \ |
| printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ |
| (unsigned long)(L), (unsigned long)(N), \ |
| (unsigned long)(H)); \ |
| BUG(); \ |
| } \ |
| } while(0) |
| |
| #define ASSERTIF(C, X) \ |
| do { \ |
| if (unlikely((C) && !(X))) { \ |
| printk(KERN_ERR "\n"); \ |
| printk(KERN_ERR "AFS: Assertion failed\n"); \ |
| BUG(); \ |
| } \ |
| } while(0) |
| |
| #define ASSERTIFCMP(C, X, OP, Y) \ |
| do { \ |
| if (unlikely((C) && !((X) OP (Y)))) { \ |
| printk(KERN_ERR "\n"); \ |
| printk(KERN_ERR "AFS: Assertion failed\n"); \ |
| printk(KERN_ERR "%lu " #OP " %lu is false\n", \ |
| (unsigned long)(X), (unsigned long)(Y)); \ |
| printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ |
| (unsigned long)(X), (unsigned long)(Y)); \ |
| BUG(); \ |
| } \ |
| } while(0) |
| |
| #else |
| |
| #define ASSERT(X) \ |
| do { \ |
| } while(0) |
| |
| #define ASSERTCMP(X, OP, Y) \ |
| do { \ |
| } while(0) |
| |
| #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
| do { \ |
| } while(0) |
| |
| #define ASSERTIF(C, X) \ |
| do { \ |
| } while(0) |
| |
| #define ASSERTIFCMP(C, X, OP, Y) \ |
| do { \ |
| } while(0) |
| |
| #endif /* __KDEBUGALL */ |