| /* 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/ktime.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/net_namespace.h> |
| #include <net/af_rxrpc.h> |
| |
| #include "afs.h" |
| #include "afs_vl.h" |
| |
| #define AFS_CELL_MAX_ADDRS 15 |
| |
| struct pagevec; |
| struct afs_call; |
| |
| 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 */ |
| bool dyn_root; /* T if dynamic root */ |
| afs_voltype_t type; /* type of volume requested */ |
| int volnamesz; /* size of volume name */ |
| const char *volname; /* name of volume to mount */ |
| struct afs_net *net; /* Network namespace in effect */ |
| 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 */ |
| }; |
| |
| struct afs_iget_data { |
| struct afs_fid fid; |
| struct afs_volume *volume; /* volume on which resides */ |
| }; |
| |
| enum afs_call_state { |
| AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */ |
| AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */ |
| AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */ |
| AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */ |
| AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */ |
| AFS_CALL_SV_REPLYING, /* Server: Replying */ |
| AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */ |
| AFS_CALL_COMPLETE, /* Completed or failed */ |
| }; |
| |
| /* |
| * List of server addresses. |
| */ |
| struct afs_addr_list { |
| struct rcu_head rcu; /* Must be first */ |
| refcount_t usage; |
| u32 version; /* Version */ |
| unsigned short nr_addrs; |
| unsigned short index; /* Address currently in use */ |
| unsigned short nr_ipv4; /* Number of IPv4 addresses */ |
| unsigned long probed; /* Mask of servers that have been probed */ |
| unsigned long yfs; /* Mask of servers that are YFS */ |
| struct sockaddr_rxrpc addrs[]; |
| }; |
| |
| /* |
| * 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_net *net; /* The network namespace */ |
| struct afs_server *cm_server; /* Server affected by incoming CM call */ |
| struct afs_cb_interest *cbi; /* Callback interest for server used */ |
| void *request; /* request data (first part) */ |
| struct address_space *mapping; /* Pages being written from */ |
| void *buffer; /* reply receive buffer */ |
| void *reply[4]; /* Where to put the reply */ |
| 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; |
| spinlock_t state_lock; |
| 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] */ |
| unsigned int cb_break; /* cb_break + cb_s_break before the call */ |
| 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 */ |
| bool ret_reply0; /* T if should return reply[0] on success */ |
| bool upgrade; /* T to request service upgrade */ |
| u16 service_id; /* Actual service ID (after upgrade) */ |
| unsigned int debug_id; /* Trace ID */ |
| 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; |
| unsigned int op; /* Really enum afs_fs_operation */ |
| |
| /* deliver request or reply data to an call |
| * - returning an error will cause the call to be aborted |
| */ |
| int (*deliver)(struct afs_call *call); |
| |
| /* clean up a call */ |
| void (*destructor)(struct afs_call *call); |
| |
| /* Work function */ |
| void (*work)(struct work_struct *work); |
| }; |
| |
| /* |
| * Key available for writeback on a file. |
| */ |
| struct afs_wb_key { |
| refcount_t usage; |
| struct key *key; |
| struct list_head vnode_link; /* Link in vnode->wb_keys */ |
| }; |
| |
| /* |
| * AFS open file information record. Pointed to by file->private_data. |
| */ |
| struct afs_file { |
| struct key *key; /* The key this file was opened with */ |
| struct afs_wb_key *wb; /* Writeback key record for this file */ |
| }; |
| |
| static inline struct key *afs_file_key(struct file *file) |
| { |
| struct afs_file *af = file->private_data; |
| |
| return af->key; |
| } |
| |
| /* |
| * 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 */ |
| loff_t remain; /* Amount remaining */ |
| atomic_t usage; |
| 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[]; |
| }; |
| |
| /* |
| * AFS superblock private data |
| * - there's one superblock per volume |
| */ |
| struct afs_super_info { |
| struct afs_net *net; /* Network namespace */ |
| struct afs_cell *cell; /* The cell in which the volume resides */ |
| struct afs_volume *volume; /* volume record */ |
| bool dyn_root; /* True if dynamic root */ |
| }; |
| |
| 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; |
| |
| /* |
| * AFS network namespace record. |
| */ |
| struct afs_net { |
| struct afs_uuid uuid; |
| bool live; /* F if this namespace is being removed */ |
| |
| /* AF_RXRPC I/O stuff */ |
| struct socket *socket; |
| struct afs_call *spare_incoming_call; |
| struct work_struct charge_preallocation_work; |
| struct mutex socket_mutex; |
| atomic_t nr_outstanding_calls; |
| atomic_t nr_superblocks; |
| |
| /* Cell database */ |
| struct rb_root cells; |
| struct afs_cell *ws_cell; |
| struct work_struct cells_manager; |
| struct timer_list cells_timer; |
| atomic_t cells_outstanding; |
| seqlock_t cells_lock; |
| |
| spinlock_t proc_cells_lock; |
| struct list_head proc_cells; |
| |
| /* Known servers. Theoretically each fileserver can only be in one |
| * cell, but in practice, people create aliases and subsets and there's |
| * no easy way to distinguish them. |
| */ |
| seqlock_t fs_lock; /* For fs_servers */ |
| struct rb_root fs_servers; /* afs_server (by server UUID or address) */ |
| struct list_head fs_updates; /* afs_server (by update_at) */ |
| struct hlist_head fs_proc; /* procfs servers list */ |
| |
| struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */ |
| struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */ |
| seqlock_t fs_addr_lock; /* For fs_addresses[46] */ |
| |
| struct work_struct fs_manager; |
| struct timer_list fs_timer; |
| atomic_t servers_outstanding; |
| |
| /* File locking renewal management */ |
| struct mutex lock_manager_mutex; |
| |
| /* Misc */ |
| struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */ |
| }; |
| |
| extern struct afs_net __afs_net;// Dummy AFS network namespace; TODO: replace with real netns |
| |
| enum afs_cell_state { |
| AFS_CELL_UNSET, |
| AFS_CELL_ACTIVATING, |
| AFS_CELL_ACTIVE, |
| AFS_CELL_DEACTIVATING, |
| AFS_CELL_INACTIVE, |
| AFS_CELL_FAILED, |
| }; |
| |
| /* |
| * AFS cell record. |
| * |
| * This is a tricky concept to get right as it is possible to create aliases |
| * simply by pointing AFSDB/SRV records for two names at the same set of VL |
| * servers; it is also possible to do things like setting up two sets of VL |
| * servers, one of which provides a superset of the volumes provided by the |
| * other (for internal/external division, for example). |
| * |
| * Cells only exist in the sense that (a) a cell's name maps to a set of VL |
| * servers and (b) a cell's name is used by the client to select the key to use |
| * for authentication and encryption. The cell name is not typically used in |
| * the protocol. |
| * |
| * There is no easy way to determine if two cells are aliases or one is a |
| * subset of another. |
| */ |
| struct afs_cell { |
| union { |
| struct rcu_head rcu; |
| struct rb_node net_node; /* Node in net->cells */ |
| }; |
| struct afs_net *net; |
| struct key *anonymous_key; /* anonymous user key for this cell */ |
| struct work_struct manager; /* Manager for init/deinit/dns */ |
| struct list_head proc_link; /* /proc cell list link */ |
| #ifdef CONFIG_AFS_FSCACHE |
| struct fscache_cookie *cache; /* caching cookie */ |
| #endif |
| time64_t dns_expiry; /* Time AFSDB/SRV record expires */ |
| time64_t last_inactive; /* Time of last drop of usage count */ |
| atomic_t usage; |
| unsigned long flags; |
| #define AFS_CELL_FL_NOT_READY 0 /* The cell record is not ready for use */ |
| #define AFS_CELL_FL_NO_GC 1 /* The cell was added manually, don't auto-gc */ |
| #define AFS_CELL_FL_NOT_FOUND 2 /* Permanent DNS error */ |
| #define AFS_CELL_FL_DNS_FAIL 3 /* Failed to access DNS */ |
| #define AFS_CELL_FL_NO_LOOKUP_YET 4 /* Not completed first DNS lookup yet */ |
| enum afs_cell_state state; |
| short error; |
| |
| /* Active fileserver interaction state. */ |
| struct list_head proc_volumes; /* procfs volume list */ |
| rwlock_t proc_lock; |
| |
| /* VL server list. */ |
| rwlock_t vl_addrs_lock; /* Lock on vl_addrs */ |
| struct afs_addr_list __rcu *vl_addrs; /* List of VL servers */ |
| u8 name_len; /* Length of name */ |
| char name[64 + 1]; /* Cell name, case-flattened and NUL-padded */ |
| }; |
| |
| /* |
| * Cached VLDB entry. |
| * |
| * This is pointed to by cell->vldb_entries, indexed by name. |
| */ |
| struct afs_vldb_entry { |
| afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */ |
| |
| unsigned long flags; |
| #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */ |
| #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */ |
| #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */ |
| #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */ |
| #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ |
| |
| uuid_t fs_server[AFS_NMAXNSERVERS]; |
| u8 fs_mask[AFS_NMAXNSERVERS]; |
| #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) */ |
| short error; |
| u8 nr_servers; /* Number of server records */ |
| u8 name_len; |
| u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ |
| }; |
| |
| /* |
| * Record of fileserver with which we're actively communicating. |
| */ |
| struct afs_server { |
| struct rcu_head rcu; |
| union { |
| uuid_t uuid; /* Server ID */ |
| struct afs_uuid _uuid; |
| }; |
| |
| struct afs_addr_list __rcu *addresses; |
| struct rb_node uuid_rb; /* Link in net->servers */ |
| struct hlist_node addr4_link; /* Link in net->fs_addresses4 */ |
| struct hlist_node addr6_link; /* Link in net->fs_addresses6 */ |
| struct hlist_node proc_link; /* Link in net->fs_proc */ |
| struct afs_server *gc_next; /* Next server in manager's list */ |
| time64_t put_time; /* Time at which last put */ |
| time64_t update_at; /* Time at which to next update the record */ |
| unsigned long flags; |
| #define AFS_SERVER_FL_NEW 0 /* New server, don't inc cb_s_break */ |
| #define AFS_SERVER_FL_NOT_READY 1 /* The record is not ready for use */ |
| #define AFS_SERVER_FL_NOT_FOUND 2 /* VL server says no such server */ |
| #define AFS_SERVER_FL_VL_FAIL 3 /* Failed to access VL server */ |
| #define AFS_SERVER_FL_UPDATING 4 |
| #define AFS_SERVER_FL_PROBED 5 /* The fileserver has been probed */ |
| #define AFS_SERVER_FL_PROBING 6 /* Fileserver is being probed */ |
| atomic_t usage; |
| u32 addr_version; /* Address list version */ |
| |
| /* file service access */ |
| rwlock_t fs_lock; /* access lock */ |
| |
| /* callback promise management */ |
| struct list_head cb_interests; /* List of superblocks using this server */ |
| unsigned cb_s_break; /* Break-everything counter. */ |
| rwlock_t cb_break_lock; /* Volume finding lock */ |
| }; |
| |
| /* |
| * Interest by a superblock on a server. |
| */ |
| struct afs_cb_interest { |
| struct list_head cb_link; /* Link in server->cb_interests */ |
| struct afs_server *server; /* Server on which this interest resides */ |
| struct super_block *sb; /* Superblock on which inodes reside */ |
| afs_volid_t vid; /* Volume ID to match */ |
| refcount_t usage; |
| }; |
| |
| /* |
| * Replaceable server list. |
| */ |
| struct afs_server_entry { |
| struct afs_server *server; |
| struct afs_cb_interest *cb_interest; |
| }; |
| |
| struct afs_server_list { |
| refcount_t usage; |
| unsigned short nr_servers; |
| unsigned short index; /* Server currently in use */ |
| unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */ |
| unsigned int seq; /* Set to ->servers_seq when installed */ |
| struct afs_server_entry servers[]; |
| }; |
| |
| /* |
| * Live AFS volume management. |
| */ |
| struct afs_volume { |
| afs_volid_t vid; /* volume ID */ |
| atomic_t usage; |
| time64_t update_at; /* Time at which to next update */ |
| struct afs_cell *cell; /* Cell to which belongs (pins ref) */ |
| struct list_head proc_link; /* Link in cell->vl_proc */ |
| unsigned long flags; |
| #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */ |
| #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */ |
| #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */ |
| #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */ |
| #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */ |
| #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */ |
| #ifdef CONFIG_AFS_FSCACHE |
| struct fscache_cookie *cache; /* caching cookie */ |
| #endif |
| struct afs_server_list *servers; /* List of servers on which volume resides */ |
| rwlock_t servers_lock; /* Lock for ->servers */ |
| unsigned int servers_seq; /* Incremented each time ->servers changes */ |
| |
| afs_voltype_t type; /* type of volume */ |
| short error; |
| char type_force; /* force volume type (suppress R/O -> R/W) */ |
| u8 name_len; |
| u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ |
| }; |
| |
| enum afs_lock_state { |
| AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */ |
| AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */ |
| AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */ |
| AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */ |
| AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */ |
| AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */ |
| AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */ |
| }; |
| |
| /* |
| * AFS inode private data. |
| * |
| * Note that afs_alloc_inode() *must* reset anything that could incorrectly |
| * leak from one inode to another. |
| */ |
| struct afs_vnode { |
| struct inode vfs_inode; /* the VFS's inode record */ |
| |
| struct afs_volume *volume; /* volume on which vnode resides */ |
| 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 *permit_cache; /* cache of permits so far obtained */ |
| struct mutex io_lock; /* Lock for serialising I/O on this mutex */ |
| struct mutex validate_lock; /* lock for validating this vnode */ |
| spinlock_t wb_lock; /* lock for wb_keys */ |
| spinlock_t lock; /* waitqueue/flags lock */ |
| unsigned long flags; |
| #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */ |
| #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ |
| #define AFS_VNODE_DIR_MODIFIED 2 /* set if dir 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_AUTOCELL 6 /* set if Vnode is an auto mount point */ |
| #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ |
| |
| struct list_head wb_keys; /* List of keys available for writeback */ |
| 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 *lock_key; /* Key to be used in lock ops */ |
| enum afs_lock_state lock_state : 8; |
| afs_lock_type_t lock_type : 8; |
| |
| /* outstanding callback notification on this file */ |
| struct afs_cb_interest *cb_interest; /* Server on which this resides */ |
| unsigned int cb_s_break; /* Mass break counter on ->server */ |
| unsigned int cb_break; /* Break counter on vnode */ |
| seqlock_t cb_lock; /* Lock for ->cb_interest, ->status, ->cb_*break */ |
| |
| time64_t cb_expires_at; /* time at which callback expires */ |
| unsigned cb_version; /* callback version */ |
| afs_callback_type_t cb_type; /* type of callback */ |
| }; |
| |
| /* |
| * 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; /* CallerAccess value for this key */ |
| }; |
| |
| /* |
| * Immutable cache of CallerAccess records from attempts to access vnodes. |
| * These may be shared between multiple vnodes. |
| */ |
| struct afs_permits { |
| struct rcu_head rcu; |
| struct hlist_node hash_node; /* Link in hash */ |
| unsigned long h; /* Hash value for this permit list */ |
| refcount_t usage; |
| unsigned short nr_permits; /* Number of records */ |
| bool invalidated; /* Invalidated due to key change */ |
| struct afs_permit permits[]; /* List of permits sorted by key pointer */ |
| }; |
| |
| /* |
| * 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 */ |
| }; |
| |
| /* |
| * Cursor for iterating over a server's address list. |
| */ |
| struct afs_addr_cursor { |
| struct afs_addr_list *alist; /* Current address list (pins ref) */ |
| struct sockaddr_rxrpc *addr; |
| u32 abort_code; |
| unsigned short start; /* Starting point in alist->addrs[] */ |
| unsigned short index; /* Wrapping offset from start to current addr */ |
| short error; |
| bool begun; /* T if we've begun iteration */ |
| bool responded; /* T if the current address responded */ |
| }; |
| |
| /* |
| * Cursor for iterating over a set of fileservers. |
| */ |
| struct afs_fs_cursor { |
| struct afs_addr_cursor ac; |
| struct afs_vnode *vnode; |
| struct afs_server_list *server_list; /* Current server list (pins ref) */ |
| struct afs_cb_interest *cbi; /* Server on which this resides (pins ref) */ |
| struct key *key; /* Key for the server */ |
| unsigned int cb_break; /* cb_break + cb_s_break before the call */ |
| unsigned int cb_break_2; /* cb_break + cb_s_break (2nd vnode) */ |
| unsigned char start; /* Initial index in server list */ |
| unsigned char index; /* Number of servers tried beyond start */ |
| unsigned short flags; |
| #define AFS_FS_CURSOR_STOP 0x0001 /* Set to cease iteration */ |
| #define AFS_FS_CURSOR_VBUSY 0x0002 /* Set if seen VBUSY */ |
| #define AFS_FS_CURSOR_VMOVED 0x0004 /* Set if seen VMOVED */ |
| #define AFS_FS_CURSOR_VNOVOL 0x0008 /* Set if seen VNOVOL */ |
| #define AFS_FS_CURSOR_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ |
| #define AFS_FS_CURSOR_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ |
| }; |
| |
| #include <trace/events/afs.h> |
| |
| /*****************************************************************************/ |
| /* |
| * addr_list.c |
| */ |
| static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist) |
| { |
| if (alist) |
| refcount_inc(&alist->usage); |
| return alist; |
| } |
| extern struct afs_addr_list *afs_alloc_addrlist(unsigned int, |
| unsigned short, |
| unsigned short); |
| extern void afs_put_addrlist(struct afs_addr_list *); |
| extern struct afs_addr_list *afs_parse_text_addrs(const char *, size_t, char, |
| unsigned short, unsigned short); |
| extern struct afs_addr_list *afs_dns_query(struct afs_cell *, time64_t *); |
| extern bool afs_iterate_addresses(struct afs_addr_cursor *); |
| extern int afs_end_cursor(struct afs_addr_cursor *); |
| extern int afs_set_vl_cursor(struct afs_addr_cursor *, struct afs_cell *); |
| |
| extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16); |
| extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16); |
| |
| /* |
| * 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_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_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_break_callback(struct afs_vnode *); |
| extern void afs_break_callbacks(struct afs_server *, size_t,struct afs_callback[]); |
| |
| extern int afs_register_server_cb_interest(struct afs_vnode *, struct afs_server_entry *); |
| extern void afs_put_cb_interest(struct afs_net *, struct afs_cb_interest *); |
| extern void afs_clear_callback_interests(struct afs_net *, struct afs_server_list *); |
| |
| static inline struct afs_cb_interest *afs_get_cb_interest(struct afs_cb_interest *cbi) |
| { |
| refcount_inc(&cbi->usage); |
| return cbi; |
| } |
| |
| /* |
| * cell.c |
| */ |
| extern int afs_cell_init(struct afs_net *, const char *); |
| extern struct afs_cell *afs_lookup_cell_rcu(struct afs_net *, const char *, unsigned); |
| extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, |
| const char *, bool); |
| extern struct afs_cell *afs_get_cell(struct afs_cell *); |
| extern void afs_put_cell(struct afs_net *, struct afs_cell *); |
| extern void afs_manage_cells(struct work_struct *); |
| extern void afs_cells_timer(struct timer_list *); |
| extern void __net_exit afs_cell_purge(struct afs_net *); |
| |
| /* |
| * cmservice.c |
| */ |
| extern bool afs_cm_incoming_call(struct afs_call *); |
| |
| /* |
| * dir.c |
| */ |
| extern const struct file_operations afs_dir_file_operations; |
| extern const struct inode_operations afs_dir_inode_operations; |
| extern const struct file_operations afs_dynroot_file_operations; |
| extern const struct inode_operations afs_dynroot_inode_operations; |
| extern const struct dentry_operations afs_fs_dentry_operations; |
| |
| extern bool afs_dir_check_page(struct inode *, struct page *); |
| |
| /* |
| * 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_cache_wb_key(struct afs_vnode *, struct afs_file *); |
| extern void afs_put_wb_key(struct afs_wb_key *); |
| extern int afs_open(struct inode *, struct file *); |
| extern int afs_release(struct inode *, struct file *); |
| extern int afs_fetch_data(struct afs_vnode *, struct key *, struct afs_read *); |
| extern int afs_page_filler(void *, struct page *); |
| extern void afs_put_read(struct afs_read *); |
| |
| /* |
| * flock.c |
| */ |
| extern struct workqueue_struct *afs_lock_manager; |
| |
| 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_fs_cursor *, struct afs_volsync *); |
| extern int afs_fs_give_up_callbacks(struct afs_net *, struct afs_server *); |
| extern int afs_fs_fetch_data(struct afs_fs_cursor *, struct afs_read *); |
| extern int afs_fs_create(struct afs_fs_cursor *, const char *, umode_t, |
| struct afs_fid *, struct afs_file_status *, struct afs_callback *); |
| extern int afs_fs_remove(struct afs_fs_cursor *, const char *, bool); |
| extern int afs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *); |
| extern int afs_fs_symlink(struct afs_fs_cursor *, const char *, const char *, |
| struct afs_fid *, struct afs_file_status *); |
| extern int afs_fs_rename(struct afs_fs_cursor *, const char *, |
| struct afs_vnode *, const char *); |
| extern int afs_fs_store_data(struct afs_fs_cursor *, struct address_space *, |
| pgoff_t, pgoff_t, unsigned, unsigned); |
| extern int afs_fs_setattr(struct afs_fs_cursor *, struct iattr *); |
| extern int afs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *); |
| extern int afs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t); |
| extern int afs_fs_extend_lock(struct afs_fs_cursor *); |
| extern int afs_fs_release_lock(struct afs_fs_cursor *); |
| extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *, |
| struct afs_addr_cursor *, struct key *); |
| extern int afs_fs_get_capabilities(struct afs_net *, struct afs_server *, |
| struct afs_addr_cursor *, struct key *); |
| |
| /* |
| * inode.c |
| */ |
| extern int afs_fetch_status(struct afs_vnode *, struct key *); |
| extern int afs_iget5_test(struct inode *, void *); |
| extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool); |
| extern struct inode *afs_iget(struct super_block *, struct key *, |
| struct afs_fid *, struct afs_file_status *, |
| struct afs_callback *, |
| struct afs_cb_interest *); |
| 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; |
| |
| static inline struct afs_net *afs_d2net(struct dentry *dentry) |
| { |
| return &__afs_net; |
| } |
| |
| static inline struct afs_net *afs_i2net(struct inode *inode) |
| { |
| return &__afs_net; |
| } |
| |
| static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) |
| { |
| return &__afs_net; |
| } |
| |
| static inline struct afs_net *afs_sock2net(struct sock *sk) |
| { |
| return &__afs_net; |
| } |
| |
| static inline struct afs_net *afs_get_net(struct afs_net *net) |
| { |
| return net; |
| } |
| |
| static inline void afs_put_net(struct afs_net *net) |
| { |
| } |
| |
| /* |
| * 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 void afs_mntpt_kill_timer(void); |
| |
| /* |
| * netdevices.c |
| */ |
| extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool); |
| |
| /* |
| * proc.c |
| */ |
| extern int __net_init afs_proc_init(struct afs_net *); |
| extern void __net_exit afs_proc_cleanup(struct afs_net *); |
| extern int afs_proc_cell_setup(struct afs_net *, struct afs_cell *); |
| extern void afs_proc_cell_remove(struct afs_net *, struct afs_cell *); |
| |
| /* |
| * rotate.c |
| */ |
| extern bool afs_begin_vnode_operation(struct afs_fs_cursor *, struct afs_vnode *, |
| struct key *); |
| extern bool afs_select_fileserver(struct afs_fs_cursor *); |
| extern bool afs_select_current_fileserver(struct afs_fs_cursor *); |
| extern int afs_end_vnode_operation(struct afs_fs_cursor *); |
| |
| /* |
| * rxrpc.c |
| */ |
| extern struct workqueue_struct *afs_async_calls; |
| |
| extern int __net_init afs_open_socket(struct afs_net *); |
| extern void __net_exit afs_close_socket(struct afs_net *); |
| extern void afs_charge_preallocation(struct work_struct *); |
| extern void afs_put_call(struct afs_call *); |
| extern int afs_queue_call_work(struct afs_call *); |
| extern long afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t, bool); |
| extern struct afs_call *afs_alloc_flat_call(struct afs_net *, |
| 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); |
| } |
| |
| static inline bool afs_check_call_state(struct afs_call *call, |
| enum afs_call_state state) |
| { |
| return READ_ONCE(call->state) == state; |
| } |
| |
| static inline bool afs_set_call_state(struct afs_call *call, |
| enum afs_call_state from, |
| enum afs_call_state to) |
| { |
| bool ok = false; |
| |
| spin_lock_bh(&call->state_lock); |
| if (call->state == from) { |
| call->state = to; |
| trace_afs_call_state(call, from, to, 0, 0); |
| ok = true; |
| } |
| spin_unlock_bh(&call->state_lock); |
| return ok; |
| } |
| |
| static inline void afs_set_call_complete(struct afs_call *call, |
| int error, u32 remote_abort) |
| { |
| enum afs_call_state state; |
| bool ok = false; |
| |
| spin_lock_bh(&call->state_lock); |
| state = call->state; |
| if (state != AFS_CALL_COMPLETE) { |
| call->abort_code = remote_abort; |
| call->error = error; |
| call->state = AFS_CALL_COMPLETE; |
| trace_afs_call_state(call, state, AFS_CALL_COMPLETE, |
| error, remote_abort); |
| ok = true; |
| } |
| spin_unlock_bh(&call->state_lock); |
| if (ok) |
| trace_afs_call_done(call); |
| } |
| |
| /* |
| * security.c |
| */ |
| extern void afs_put_permits(struct afs_permits *); |
| extern void afs_clear_permits(struct afs_vnode *); |
| extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int); |
| extern void afs_zap_permits(struct rcu_head *); |
| extern struct key *afs_request_key(struct afs_cell *); |
| extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); |
| extern int afs_permission(struct inode *, int); |
| extern void __exit afs_clean_up_permit_cache(void); |
| |
| /* |
| * server.c |
| */ |
| extern spinlock_t afs_server_peer_lock; |
| |
| static inline struct afs_server *afs_get_server(struct afs_server *server) |
| { |
| atomic_inc(&server->usage); |
| return server; |
| } |
| |
| extern struct afs_server *afs_find_server(struct afs_net *, |
| const struct sockaddr_rxrpc *); |
| extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); |
| extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *); |
| extern void afs_put_server(struct afs_net *, struct afs_server *); |
| extern void afs_manage_servers(struct work_struct *); |
| extern void afs_servers_timer(struct timer_list *); |
| extern void __net_exit afs_purge_servers(struct afs_net *); |
| extern bool afs_probe_fileserver(struct afs_fs_cursor *); |
| extern bool afs_check_server_record(struct afs_fs_cursor *, struct afs_server *); |
| |
| /* |
| * server_list.c |
| */ |
| static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) |
| { |
| refcount_inc(&slist->usage); |
| return slist; |
| } |
| |
| extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); |
| extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *, |
| struct afs_vldb_entry *, |
| u8); |
| extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); |
| |
| /* |
| * super.c |
| */ |
| extern int __init afs_fs_init(void); |
| extern void __exit afs_fs_exit(void); |
| |
| /* |
| * vlclient.c |
| */ |
| extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_net *, |
| struct afs_addr_cursor *, |
| struct key *, const char *, int); |
| extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_net *, struct afs_addr_cursor *, |
| struct key *, const uuid_t *); |
| extern int afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, struct key *); |
| extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_net *, struct afs_addr_cursor *, |
| struct key *, const uuid_t *); |
| |
| /* |
| * volume.c |
| */ |
| static inline struct afs_volume *__afs_get_volume(struct afs_volume *volume) |
| { |
| if (volume) |
| atomic_inc(&volume->usage); |
| return volume; |
| } |
| |
| extern struct afs_volume *afs_create_volume(struct afs_mount_params *); |
| extern void afs_activate_volume(struct afs_volume *); |
| extern void afs_deactivate_volume(struct afs_volume *); |
| extern void afs_put_volume(struct afs_cell *, struct afs_volume *); |
| extern int afs_check_volume_status(struct afs_volume *, struct key *); |
| |
| /* |
| * write.c |
| */ |
| extern int afs_set_page_dirty(struct page *); |
| 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_flush(struct file *, fl_owner_t); |
| extern int afs_fsync(struct file *, loff_t, loff_t, int); |
| extern int afs_page_mkwrite(struct vm_fault *); |
| extern void afs_prune_wb_keys(struct afs_vnode *); |
| extern int afs_launder_page(struct page *); |
| |
| /* |
| * xattr.c |
| */ |
| extern const struct xattr_handler *afs_xattr_handlers[]; |
| extern ssize_t afs_listxattr(struct dentry *, char *, size_t); |
| |
| |
| /* |
| * Miscellaneous inline functions. |
| */ |
| 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; |
| } |
| |
| static inline void afs_vnode_commit_status(struct afs_fs_cursor *fc, |
| struct afs_vnode *vnode, |
| unsigned int cb_break) |
| { |
| if (fc->ac.error == 0) |
| afs_cache_permit(vnode, fc->key, cb_break); |
| } |
| |
| static inline void afs_check_for_remote_deletion(struct afs_fs_cursor *fc, |
| struct afs_vnode *vnode) |
| { |
| if (fc->ac.error == -ENOENT) { |
| set_bit(AFS_VNODE_DELETED, &vnode->flags); |
| afs_break_callback(vnode); |
| } |
| } |
| |
| |
| /*****************************************************************************/ |
| /* |
| * debug tracing |
| */ |
| 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 */ |