/* SPDX-License-Identifier: GPL-2.0-or-later */
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/* internal AFS stuff
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*
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* Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*/
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#include <linux/compiler.h>
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#include <linux/kernel.h>
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#include <linux/ktime.h>
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#include <linux/fs.h>
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#include <linux/pagemap.h>
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#include <linux/rxrpc.h>
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#include <linux/key.h>
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#include <linux/workqueue.h>
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#include <linux/sched.h>
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#include <linux/fscache.h>
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#include <linux/backing-dev.h>
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#include <linux/uuid.h>
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#include <linux/mm_types.h>
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#include <linux/dns_resolver.h>
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#include <net/net_namespace.h>
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#include <net/netns/generic.h>
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#include <net/sock.h>
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#include <net/af_rxrpc.h>
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#include "afs.h"
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#include "afs_vl.h"
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#define AFS_CELL_MAX_ADDRS 15
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struct pagevec;
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struct afs_call;
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/*
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* Partial file-locking emulation mode. (The problem being that AFS3 only
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* allows whole-file locks and no upgrading/downgrading).
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*/
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enum afs_flock_mode {
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afs_flock_mode_unset,
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afs_flock_mode_local, /* Local locking only */
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afs_flock_mode_openafs, /* Don't get server lock for a partial lock */
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afs_flock_mode_strict, /* Always get a server lock for a partial lock */
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afs_flock_mode_write, /* Get an exclusive server lock for a partial lock */
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};
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struct afs_fs_context {
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bool force; /* T to force cell type */
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bool autocell; /* T if set auto mount operation */
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bool dyn_root; /* T if dynamic root */
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bool no_cell; /* T if the source is "none" (for dynroot) */
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enum afs_flock_mode flock_mode; /* Partial file-locking emulation mode */
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afs_voltype_t type; /* type of volume requested */
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unsigned int volnamesz; /* size of volume name */
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const char *volname; /* name of volume to mount */
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struct afs_net *net; /* the AFS net namespace stuff */
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struct afs_cell *cell; /* cell in which to find volume */
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struct afs_volume *volume; /* volume record */
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struct key *key; /* key to use for secure mounting */
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};
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enum afs_call_state {
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AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */
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AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */
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AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */
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AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */
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AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */
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AFS_CALL_SV_REPLYING, /* Server: Replying */
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AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */
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AFS_CALL_COMPLETE, /* Completed or failed */
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};
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/*
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* List of server addresses.
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*/
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struct afs_addr_list {
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struct rcu_head rcu;
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refcount_t usage;
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u32 version; /* Version */
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unsigned char max_addrs;
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unsigned char nr_addrs;
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unsigned char preferred; /* Preferred address */
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unsigned char nr_ipv4; /* Number of IPv4 addresses */
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enum dns_record_source source:8;
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enum dns_lookup_status status:8;
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unsigned long failed; /* Mask of addrs that failed locally/ICMP */
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unsigned long responded; /* Mask of addrs that responded */
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struct sockaddr_rxrpc addrs[];
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#define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8))
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};
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/*
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* a record of an in-progress RxRPC call
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*/
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struct afs_call {
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const struct afs_call_type *type; /* type of call */
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struct afs_addr_list *alist; /* Address is alist[addr_ix] */
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wait_queue_head_t waitq; /* processes awaiting completion */
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struct work_struct async_work; /* async I/O processor */
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struct work_struct work; /* actual work processor */
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struct rxrpc_call *rxcall; /* RxRPC call handle */
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struct key *key; /* security for this call */
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struct afs_net *net; /* The network namespace */
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struct afs_server *server; /* The fileserver record if fs op (pins ref) */
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struct afs_vlserver *vlserver; /* The vlserver record if vl op */
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void *request; /* request data (first part) */
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struct iov_iter def_iter; /* Default buffer/data iterator */
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struct iov_iter *iter; /* Iterator currently in use */
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union { /* Convenience for ->def_iter */
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struct kvec kvec[1];
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struct bio_vec bvec[1];
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};
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void *buffer; /* reply receive buffer */
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union {
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long ret0; /* Value to reply with instead of 0 */
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struct afs_addr_list *ret_alist;
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struct afs_vldb_entry *ret_vldb;
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char *ret_str;
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};
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struct afs_operation *op;
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unsigned int server_index;
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atomic_t usage;
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enum afs_call_state state;
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spinlock_t state_lock;
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int error; /* error code */
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u32 abort_code; /* Remote abort ID or 0 */
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unsigned int max_lifespan; /* Maximum lifespan to set if not 0 */
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unsigned request_size; /* size of request data */
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unsigned reply_max; /* maximum size of reply */
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unsigned count2; /* count used in unmarshalling */
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unsigned char unmarshall; /* unmarshalling phase */
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unsigned char addr_ix; /* Address in ->alist */
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bool drop_ref; /* T if need to drop ref for incoming call */
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bool send_pages; /* T if data from mapping should be sent */
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bool need_attention; /* T if RxRPC poked us */
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bool async; /* T if asynchronous */
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bool upgrade; /* T to request service upgrade */
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bool intr; /* T if interruptible */
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bool unmarshalling_error; /* T if an unmarshalling error occurred */
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u16 service_id; /* Actual service ID (after upgrade) */
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unsigned int debug_id; /* Trace ID */
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u32 operation_ID; /* operation ID for an incoming call */
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u32 count; /* count for use in unmarshalling */
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union { /* place to extract temporary data */
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struct {
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__be32 tmp_u;
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__be32 tmp;
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} __attribute__((packed));
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__be64 tmp64;
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};
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ktime_t issue_time; /* Time of issue of operation */
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};
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struct afs_call_type {
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const char *name;
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unsigned int op; /* Really enum afs_fs_operation */
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/* deliver request or reply data to an call
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* - returning an error will cause the call to be aborted
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*/
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int (*deliver)(struct afs_call *call);
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/* clean up a call */
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void (*destructor)(struct afs_call *call);
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/* Work function */
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void (*work)(struct work_struct *work);
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/* Call done function (gets called immediately on success or failure) */
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void (*done)(struct afs_call *call);
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};
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/*
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* Key available for writeback on a file.
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*/
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struct afs_wb_key {
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refcount_t usage;
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struct key *key;
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struct list_head vnode_link; /* Link in vnode->wb_keys */
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};
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/*
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* AFS open file information record. Pointed to by file->private_data.
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*/
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struct afs_file {
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struct key *key; /* The key this file was opened with */
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struct afs_wb_key *wb; /* Writeback key record for this file */
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};
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static inline struct key *afs_file_key(struct file *file)
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{
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struct afs_file *af = file->private_data;
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return af->key;
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}
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/*
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* Record of an outstanding read operation on a vnode.
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*/
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struct afs_read {
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loff_t pos; /* Where to start reading */
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loff_t len; /* How much we're asking for */
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loff_t actual_len; /* How much we're actually getting */
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loff_t remain; /* Amount remaining */
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loff_t file_size; /* File size returned by server */
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afs_dataversion_t data_version; /* Version number returned by server */
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refcount_t usage;
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unsigned int index; /* Which page we're reading into */
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unsigned int nr_pages;
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unsigned int offset; /* offset into current page */
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struct afs_vnode *vnode;
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void (*page_done)(struct afs_read *);
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struct page **pages;
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struct page *array[];
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};
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/*
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* AFS superblock private data
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* - there's one superblock per volume
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*/
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struct afs_super_info {
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struct net *net_ns; /* Network namespace */
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struct afs_cell *cell; /* The cell in which the volume resides */
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struct afs_volume *volume; /* volume record */
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enum afs_flock_mode flock_mode:8; /* File locking emulation mode */
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bool dyn_root; /* True if dynamic root */
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};
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static inline struct afs_super_info *AFS_FS_S(struct super_block *sb)
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{
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return sb->s_fs_info;
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}
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extern struct file_system_type afs_fs_type;
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/*
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* Set of substitutes for @sys.
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*/
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struct afs_sysnames {
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#define AFS_NR_SYSNAME 16
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char *subs[AFS_NR_SYSNAME];
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refcount_t usage;
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unsigned short nr;
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char blank[1];
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};
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/*
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* AFS network namespace record.
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*/
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struct afs_net {
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struct net *net; /* Backpointer to the owning net namespace */
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struct afs_uuid uuid;
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bool live; /* F if this namespace is being removed */
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/* AF_RXRPC I/O stuff */
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struct socket *socket;
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struct afs_call *spare_incoming_call;
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struct work_struct charge_preallocation_work;
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struct mutex socket_mutex;
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atomic_t nr_outstanding_calls;
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atomic_t nr_superblocks;
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/* Cell database */
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struct rb_root cells;
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struct afs_cell *ws_cell;
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struct work_struct cells_manager;
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struct timer_list cells_timer;
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atomic_t cells_outstanding;
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struct rw_semaphore cells_lock;
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struct mutex cells_alias_lock;
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struct mutex proc_cells_lock;
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struct hlist_head proc_cells;
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/* Known servers. Theoretically each fileserver can only be in one
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* cell, but in practice, people create aliases and subsets and there's
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* no easy way to distinguish them.
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*/
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seqlock_t fs_lock; /* For fs_servers, fs_probe_*, fs_proc */
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struct rb_root fs_servers; /* afs_server (by server UUID or address) */
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struct list_head fs_probe_fast; /* List of afs_server to probe at 30s intervals */
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struct list_head fs_probe_slow; /* List of afs_server to probe at 5m intervals */
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struct hlist_head fs_proc; /* procfs servers list */
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struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */
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struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */
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seqlock_t fs_addr_lock; /* For fs_addresses[46] */
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struct work_struct fs_manager;
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struct timer_list fs_timer;
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struct work_struct fs_prober;
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struct timer_list fs_probe_timer;
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atomic_t servers_outstanding;
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/* File locking renewal management */
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struct mutex lock_manager_mutex;
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/* Misc */
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struct super_block *dynroot_sb; /* Dynamic root mount superblock */
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struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */
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struct afs_sysnames *sysnames;
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rwlock_t sysnames_lock;
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/* Statistics counters */
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atomic_t n_lookup; /* Number of lookups done */
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atomic_t n_reval; /* Number of dentries needing revalidation */
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atomic_t n_inval; /* Number of invalidations by the server */
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atomic_t n_relpg; /* Number of invalidations by releasepage */
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atomic_t n_read_dir; /* Number of directory pages read */
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atomic_t n_dir_cr; /* Number of directory entry creation edits */
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atomic_t n_dir_rm; /* Number of directory entry removal edits */
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atomic_t n_stores; /* Number of store ops */
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atomic_long_t n_store_bytes; /* Number of bytes stored */
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atomic_long_t n_fetch_bytes; /* Number of bytes fetched */
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atomic_t n_fetches; /* Number of data fetch ops */
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};
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extern const char afs_init_sysname[];
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enum afs_cell_state {
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AFS_CELL_UNSET,
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AFS_CELL_ACTIVATING,
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AFS_CELL_ACTIVE,
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AFS_CELL_DEACTIVATING,
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AFS_CELL_INACTIVE,
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AFS_CELL_FAILED,
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AFS_CELL_REMOVED,
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};
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/*
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* AFS cell record.
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*
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* This is a tricky concept to get right as it is possible to create aliases
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* simply by pointing AFSDB/SRV records for two names at the same set of VL
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* servers; it is also possible to do things like setting up two sets of VL
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* servers, one of which provides a superset of the volumes provided by the
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* other (for internal/external division, for example).
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*
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* Cells only exist in the sense that (a) a cell's name maps to a set of VL
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* servers and (b) a cell's name is used by the client to select the key to use
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* for authentication and encryption. The cell name is not typically used in
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* the protocol.
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*
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* Two cells are determined to be aliases if they have an explicit alias (YFS
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* only), share any VL servers in common or have at least one volume in common.
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* "In common" means that the address list of the VL servers or the fileservers
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* share at least one endpoint.
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*/
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struct afs_cell {
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union {
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struct rcu_head rcu;
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struct rb_node net_node; /* Node in net->cells */
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};
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struct afs_net *net;
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struct afs_cell *alias_of; /* The cell this is an alias of */
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struct afs_volume *root_volume; /* The root.cell volume if there is one */
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struct key *anonymous_key; /* anonymous user key for this cell */
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struct work_struct manager; /* Manager for init/deinit/dns */
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struct hlist_node proc_link; /* /proc cell list link */
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#ifdef CONFIG_AFS_FSCACHE
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struct fscache_cookie *cache; /* caching cookie */
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#endif
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time64_t dns_expiry; /* Time AFSDB/SRV record expires */
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time64_t last_inactive; /* Time of last drop of usage count */
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atomic_t ref; /* Struct refcount */
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atomic_t active; /* Active usage counter */
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unsigned long flags;
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#define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */
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#define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */
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#define AFS_CELL_FL_CHECK_ALIAS 2 /* Need to check for aliases */
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enum afs_cell_state state;
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short error;
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enum dns_record_source dns_source:8; /* Latest source of data from lookup */
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enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */
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unsigned int dns_lookup_count; /* Counter of DNS lookups */
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unsigned int debug_id;
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/* The volumes belonging to this cell */
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struct rb_root volumes; /* Tree of volumes on this server */
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struct hlist_head proc_volumes; /* procfs volume list */
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seqlock_t volume_lock; /* For volumes */
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/* Active fileserver interaction state. */
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struct rb_root fs_servers; /* afs_server (by server UUID) */
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seqlock_t fs_lock; /* For fs_servers */
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/* VL server list. */
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rwlock_t vl_servers_lock; /* Lock on vl_servers */
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struct afs_vlserver_list __rcu *vl_servers;
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u8 name_len; /* Length of name */
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char *name; /* Cell name, case-flattened and NUL-padded */
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};
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/*
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* Volume Location server record.
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*/
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struct afs_vlserver {
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struct rcu_head rcu;
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struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */
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unsigned long flags;
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#define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */
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#define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */
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#define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */
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#define AFS_VLSERVER_FL_RESPONDING 3 /* VL server is responding */
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rwlock_t lock; /* Lock on addresses */
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atomic_t usage;
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unsigned int rtt; /* Server's current RTT in uS */
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/* Probe state */
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wait_queue_head_t probe_wq;
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atomic_t probe_outstanding;
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spinlock_t probe_lock;
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struct {
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unsigned int rtt; /* RTT in uS */
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u32 abort_code;
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short error;
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unsigned short flags;
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#define AFS_VLSERVER_PROBE_RESPONDED 0x01 /* At least once response (may be abort) */
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#define AFS_VLSERVER_PROBE_IS_YFS 0x02 /* The peer appears to be YFS */
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#define AFS_VLSERVER_PROBE_NOT_YFS 0x04 /* The peer appears not to be YFS */
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#define AFS_VLSERVER_PROBE_LOCAL_FAILURE 0x08 /* A local failure prevented a probe */
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} probe;
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u16 port;
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u16 name_len; /* Length of name */
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char name[]; /* Server name, case-flattened */
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};
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/*
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* Weighted list of Volume Location servers.
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*/
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struct afs_vlserver_entry {
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u16 priority; /* Preference (as SRV) */
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u16 weight; /* Weight (as SRV) */
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enum dns_record_source source:8;
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enum dns_lookup_status status:8;
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struct afs_vlserver *server;
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};
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struct afs_vlserver_list {
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struct rcu_head rcu;
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atomic_t usage;
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u8 nr_servers;
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u8 index; /* Server currently in use */
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u8 preferred; /* Preferred server */
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enum dns_record_source source:8;
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enum dns_lookup_status status:8;
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rwlock_t lock;
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struct afs_vlserver_entry servers[];
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};
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/*
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* Cached VLDB entry.
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*
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* This is pointed to by cell->vldb_entries, indexed by name.
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*/
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struct afs_vldb_entry {
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afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */
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unsigned long flags;
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#define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */
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#define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */
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#define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */
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#define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */
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#define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */
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uuid_t fs_server[AFS_NMAXNSERVERS];
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u32 addr_version[AFS_NMAXNSERVERS]; /* Registration change counters */
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u8 fs_mask[AFS_NMAXNSERVERS];
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#define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */
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#define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */
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#define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */
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short error;
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u8 nr_servers; /* Number of server records */
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u8 name_len;
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u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */
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};
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/*
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* Record of fileserver with which we're actively communicating.
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*/
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struct afs_server {
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struct rcu_head rcu;
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union {
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uuid_t uuid; /* Server ID */
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struct afs_uuid _uuid;
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};
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struct afs_addr_list __rcu *addresses;
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struct afs_cell *cell; /* Cell to which belongs (pins ref) */
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struct rb_node uuid_rb; /* Link in net->fs_servers */
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struct afs_server __rcu *uuid_next; /* Next server with same UUID */
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struct afs_server *uuid_prev; /* Previous server with same UUID */
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struct list_head probe_link; /* Link in net->fs_probe_list */
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struct hlist_node addr4_link; /* Link in net->fs_addresses4 */
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struct hlist_node addr6_link; /* Link in net->fs_addresses6 */
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struct hlist_node proc_link; /* Link in net->fs_proc */
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struct afs_server *gc_next; /* Next server in manager's list */
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time64_t unuse_time; /* Time at which last unused */
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unsigned long flags;
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#define AFS_SERVER_FL_RESPONDING 0 /* The server is responding */
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#define AFS_SERVER_FL_UPDATING 1
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#define AFS_SERVER_FL_NEEDS_UPDATE 2 /* Fileserver address list is out of date */
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#define AFS_SERVER_FL_NOT_READY 4 /* The record is not ready for use */
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#define AFS_SERVER_FL_NOT_FOUND 5 /* VL server says no such server */
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#define AFS_SERVER_FL_VL_FAIL 6 /* Failed to access VL server */
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#define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */
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#define AFS_SERVER_FL_IS_YFS 16 /* Server is YFS not AFS */
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#define AFS_SERVER_FL_NO_IBULK 17 /* Fileserver doesn't support FS.InlineBulkStatus */
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#define AFS_SERVER_FL_NO_RM2 18 /* Fileserver doesn't support YFS.RemoveFile2 */
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atomic_t ref; /* Object refcount */
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atomic_t active; /* Active user count */
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u32 addr_version; /* Address list version */
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unsigned int rtt; /* Server's current RTT in uS */
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unsigned int debug_id; /* Debugging ID for traces */
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/* file service access */
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rwlock_t fs_lock; /* access lock */
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/* callback promise management */
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unsigned cb_s_break; /* Break-everything counter. */
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/* Probe state */
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unsigned long probed_at; /* Time last probe was dispatched (jiffies) */
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wait_queue_head_t probe_wq;
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atomic_t probe_outstanding;
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spinlock_t probe_lock;
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struct {
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unsigned int rtt; /* RTT in uS */
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u32 abort_code;
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short error;
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bool responded:1;
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bool is_yfs:1;
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bool not_yfs:1;
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bool local_failure:1;
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} probe;
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};
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/*
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* Replaceable volume server list.
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*/
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struct afs_server_entry {
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struct afs_server *server;
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};
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struct afs_server_list {
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afs_volid_t vids[AFS_MAXTYPES]; /* Volume IDs */
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refcount_t usage;
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unsigned char nr_servers;
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unsigned char preferred; /* Preferred server */
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unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */
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unsigned int seq; /* Set to ->servers_seq when installed */
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rwlock_t lock;
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struct afs_server_entry servers[];
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};
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/*
|
* Live AFS volume management.
|
*/
|
struct afs_volume {
|
union {
|
struct rcu_head rcu;
|
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 rb_node cell_node; /* Link in cell->volumes */
|
struct hlist_node proc_link; /* Link in cell->proc_volumes */
|
struct super_block __rcu *sb; /* Superblock on which inodes reside */
|
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 */
|
#define AFS_VOLUME_MAYBE_NO_IBULK 6 /* - T if some servers don't have InlineBulkStatus */
|
#ifdef CONFIG_AFS_FSCACHE
|
struct fscache_cookie *cache; /* caching cookie */
|
#endif
|
struct afs_server_list __rcu *servers; /* List of servers on which volume resides */
|
rwlock_t servers_lock; /* Lock for ->servers */
|
unsigned int servers_seq; /* Incremented each time ->servers changes */
|
|
unsigned cb_v_break; /* Break-everything counter. */
|
rwlock_t cb_v_break_lock;
|
|
afs_voltype_t type; /* type of volume */
|
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_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */
|
};
|
|
/*
|
* 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 */
|
afs_dataversion_t invalid_before; /* Child dentries are invalid before this */
|
#ifdef CONFIG_AFS_FSCACHE
|
struct fscache_cookie *cache; /* caching cookie */
|
#endif
|
struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */
|
struct mutex io_lock; /* Lock for serialising I/O on this mutex */
|
struct rw_semaphore validate_lock; /* lock for validating this vnode */
|
struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */
|
struct key *silly_key; /* Silly rename key */
|
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_VALID 2 /* Set if dir contents are valid */
|
#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 */
|
#define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */
|
#define AFS_VNODE_SILLY_DELETED 9 /* Set if file has been silly-deleted */
|
#define AFS_VNODE_MODIFYING 10 /* Set if we're performing a modification op */
|
|
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 */
|
ktime_t locked_at; /* Time at which lock obtained */
|
enum afs_lock_state lock_state : 8;
|
afs_lock_type_t lock_type : 8;
|
|
/* outstanding callback notification on this file */
|
void *cb_server; /* Server with callback/filelock */
|
unsigned int cb_s_break; /* Mass break counter on ->server */
|
unsigned int cb_v_break; /* Mass break counter on ->volume */
|
unsigned int cb_break; /* Break counter on vnode */
|
seqlock_t cb_lock; /* Lock for ->cb_server, ->status, ->cb_*break */
|
|
time64_t cb_expires_at; /* time at which callback expires */
|
};
|
|
static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode)
|
{
|
#ifdef CONFIG_AFS_FSCACHE
|
return vnode->cache;
|
#else
|
return NULL;
|
#endif
|
}
|
|
/*
|
* 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 */
|
};
|
|
/*
|
* Error prioritisation and accumulation.
|
*/
|
struct afs_error {
|
short error; /* Accumulated error */
|
bool responded; /* T if server responded */
|
};
|
|
/*
|
* Cursor for iterating over a server's address list.
|
*/
|
struct afs_addr_cursor {
|
struct afs_addr_list *alist; /* Current address list (pins ref) */
|
unsigned long tried; /* Tried addresses */
|
signed char index; /* Current address */
|
bool responded; /* T if the current address responded */
|
unsigned short nr_iterations; /* Number of address iterations */
|
short error;
|
u32 abort_code;
|
};
|
|
/*
|
* Cursor for iterating over a set of volume location servers.
|
*/
|
struct afs_vl_cursor {
|
struct afs_addr_cursor ac;
|
struct afs_cell *cell; /* The cell we're querying */
|
struct afs_vlserver_list *server_list; /* Current server list (pins ref) */
|
struct afs_vlserver *server; /* Server on which this resides */
|
struct key *key; /* Key for the server */
|
unsigned long untried; /* Bitmask of untried servers */
|
short index; /* Current server */
|
short error;
|
unsigned short flags;
|
#define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */
|
#define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */
|
#define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */
|
unsigned short nr_iterations; /* Number of server iterations */
|
};
|
|
/*
|
* Fileserver operation methods.
|
*/
|
struct afs_operation_ops {
|
void (*issue_afs_rpc)(struct afs_operation *op);
|
void (*issue_yfs_rpc)(struct afs_operation *op);
|
void (*success)(struct afs_operation *op);
|
void (*aborted)(struct afs_operation *op);
|
void (*edit_dir)(struct afs_operation *op);
|
void (*put)(struct afs_operation *op);
|
};
|
|
struct afs_vnode_param {
|
struct afs_vnode *vnode;
|
struct afs_fid fid; /* Fid to access */
|
struct afs_status_cb scb; /* Returned status and callback promise */
|
afs_dataversion_t dv_before; /* Data version before the call */
|
unsigned int cb_break_before; /* cb_break + cb_s_break before the call */
|
u8 dv_delta; /* Expected change in data version */
|
bool put_vnode:1; /* T if we have a ref on the vnode */
|
bool need_io_lock:1; /* T if we need the I/O lock on this */
|
bool update_ctime:1; /* Need to update the ctime */
|
bool set_size:1; /* Must update i_size */
|
bool op_unlinked:1; /* True if file was unlinked by op */
|
bool speculative:1; /* T if speculative status fetch (no vnode lock) */
|
bool modification:1; /* Set if the content gets modified */
|
};
|
|
/*
|
* Fileserver operation wrapper, handling server and address rotation
|
* asynchronously. May make simultaneous calls to multiple servers.
|
*/
|
struct afs_operation {
|
struct afs_net *net; /* Network namespace */
|
struct key *key; /* Key for the cell */
|
const struct afs_call_type *type; /* Type of call done */
|
const struct afs_operation_ops *ops;
|
|
/* Parameters/results for the operation */
|
struct afs_volume *volume; /* Volume being accessed */
|
struct afs_vnode_param file[2];
|
struct afs_vnode_param *more_files;
|
struct afs_volsync volsync;
|
struct dentry *dentry; /* Dentry to be altered */
|
struct dentry *dentry_2; /* Second dentry to be altered */
|
struct timespec64 mtime; /* Modification time to record */
|
struct timespec64 ctime; /* Change time to set */
|
short nr_files; /* Number of entries in file[], more_files */
|
short error;
|
unsigned int debug_id;
|
|
unsigned int cb_v_break; /* Volume break counter before op */
|
unsigned int cb_s_break; /* Server break counter before op */
|
|
union {
|
struct {
|
int which; /* Which ->file[] to fetch for */
|
} fetch_status;
|
struct {
|
int reason; /* enum afs_edit_dir_reason */
|
mode_t mode;
|
const char *symlink;
|
} create;
|
struct {
|
bool need_rehash;
|
} unlink;
|
struct {
|
struct dentry *rehash;
|
struct dentry *tmp;
|
bool new_negative;
|
} rename;
|
struct {
|
struct afs_read *req;
|
} fetch;
|
struct {
|
afs_lock_type_t type;
|
} lock;
|
struct {
|
struct address_space *mapping; /* Pages being written from */
|
pgoff_t first; /* first page in mapping to deal with */
|
pgoff_t last; /* last page in mapping to deal with */
|
unsigned first_offset; /* offset into mapping[first] */
|
unsigned last_to; /* amount of mapping[last] */
|
bool laundering; /* Laundering page, PG_writeback not set */
|
} store;
|
struct {
|
struct iattr *attr;
|
loff_t old_i_size;
|
} setattr;
|
struct afs_acl *acl;
|
struct yfs_acl *yacl;
|
struct {
|
struct afs_volume_status vs;
|
struct kstatfs *buf;
|
} volstatus;
|
};
|
|
/* Fileserver iteration state */
|
struct afs_addr_cursor ac;
|
struct afs_server_list *server_list; /* Current server list (pins ref) */
|
struct afs_server *server; /* Server we're using (ref pinned by server_list) */
|
struct afs_call *call;
|
unsigned long untried; /* Bitmask of untried servers */
|
short index; /* Current server */
|
unsigned short nr_iterations; /* Number of server iterations */
|
|
unsigned int flags;
|
#define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */
|
#define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */
|
#define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */
|
#define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */
|
#define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */
|
#define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */
|
#define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */
|
#define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */
|
#define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */
|
#define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */
|
#define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */
|
#define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */
|
#define AFS_OPERATION_DIR_CONFLICT 0x1000 /* Set if we detected a 3rd-party dir change */
|
};
|
|
/*
|
* Cache auxiliary data.
|
*/
|
struct afs_vnode_cache_aux {
|
u64 data_version;
|
} __packed;
|
|
/*
|
* We use page->private to hold the amount of the page that we've written to,
|
* splitting the field into two parts. However, we need to represent a range
|
* 0...PAGE_SIZE, so we reduce the resolution if the size of the page
|
* exceeds what we can encode.
|
*/
|
#ifdef CONFIG_64BIT
|
#define __AFS_PAGE_PRIV_MASK 0x7fffffffUL
|
#define __AFS_PAGE_PRIV_SHIFT 32
|
#define __AFS_PAGE_PRIV_MMAPPED 0x80000000UL
|
#else
|
#define __AFS_PAGE_PRIV_MASK 0x7fffUL
|
#define __AFS_PAGE_PRIV_SHIFT 16
|
#define __AFS_PAGE_PRIV_MMAPPED 0x8000UL
|
#endif
|
|
static inline unsigned int afs_page_dirty_resolution(void)
|
{
|
int shift = PAGE_SHIFT - (__AFS_PAGE_PRIV_SHIFT - 1);
|
return (shift > 0) ? shift : 0;
|
}
|
|
static inline size_t afs_page_dirty_from(unsigned long priv)
|
{
|
unsigned long x = priv & __AFS_PAGE_PRIV_MASK;
|
|
/* The lower bound is inclusive */
|
return x << afs_page_dirty_resolution();
|
}
|
|
static inline size_t afs_page_dirty_to(unsigned long priv)
|
{
|
unsigned long x = (priv >> __AFS_PAGE_PRIV_SHIFT) & __AFS_PAGE_PRIV_MASK;
|
|
/* The upper bound is immediately beyond the region */
|
return (x + 1) << afs_page_dirty_resolution();
|
}
|
|
static inline unsigned long afs_page_dirty(size_t from, size_t to)
|
{
|
unsigned int res = afs_page_dirty_resolution();
|
from >>= res;
|
to = (to - 1) >> res;
|
return (to << __AFS_PAGE_PRIV_SHIFT) | from;
|
}
|
|
static inline unsigned long afs_page_dirty_mmapped(unsigned long priv)
|
{
|
return priv | __AFS_PAGE_PRIV_MMAPPED;
|
}
|
|
static inline bool afs_is_page_dirty_mmapped(unsigned long priv)
|
{
|
return priv & __AFS_PAGE_PRIV_MMAPPED;
|
}
|
|
#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_vlserver_list *afs_parse_text_addrs(struct afs_net *,
|
const char *, size_t, char,
|
unsigned short, unsigned short);
|
extern struct afs_vlserver_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 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 *, enum afs_cb_break_reason);
|
extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason);
|
extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *);
|
|
static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode)
|
{
|
return vnode->cb_break + vnode->cb_v_break;
|
}
|
|
static inline bool afs_cb_is_broken(unsigned int cb_break,
|
const struct afs_vnode *vnode)
|
{
|
return cb_break != (vnode->cb_break + vnode->volume->cb_v_break);
|
}
|
|
/*
|
* cell.c
|
*/
|
extern int afs_cell_init(struct afs_net *, const char *);
|
extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned,
|
enum afs_cell_trace);
|
extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned,
|
const char *, bool);
|
extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace);
|
extern void afs_unuse_cell(struct afs_net *, struct afs_cell *, enum afs_cell_trace);
|
extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace);
|
extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace);
|
extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace);
|
extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace);
|
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 address_space_operations afs_dir_aops;
|
extern const struct dentry_operations afs_fs_dentry_operations;
|
|
extern void afs_d_release(struct dentry *);
|
extern void afs_check_for_remote_deletion(struct afs_operation *);
|
|
/*
|
* dir_edit.c
|
*/
|
extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *,
|
enum afs_edit_dir_reason);
|
extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason);
|
|
/*
|
* dir_silly.c
|
*/
|
extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *,
|
struct dentry *, struct key *);
|
extern int afs_silly_iput(struct dentry *, struct inode *);
|
|
/*
|
* dynroot.c
|
*/
|
extern const struct inode_operations afs_dynroot_inode_operations;
|
extern const struct dentry_operations afs_dynroot_dentry_operations;
|
|
extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *);
|
extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *);
|
extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *);
|
extern int afs_dynroot_populate(struct super_block *);
|
extern void afs_dynroot_depopulate(struct super_block *);
|
|
/*
|
* 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 *);
|
|
static inline struct afs_read *afs_get_read(struct afs_read *req)
|
{
|
refcount_inc(&req->usage);
|
return req;
|
}
|
|
/*
|
* flock.c
|
*/
|
extern struct workqueue_struct *afs_lock_manager;
|
|
extern void afs_lock_op_done(struct afs_call *);
|
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 void afs_fs_fetch_status(struct afs_operation *);
|
extern void afs_fs_fetch_data(struct afs_operation *);
|
extern void afs_fs_create_file(struct afs_operation *);
|
extern void afs_fs_make_dir(struct afs_operation *);
|
extern void afs_fs_remove_file(struct afs_operation *);
|
extern void afs_fs_remove_dir(struct afs_operation *);
|
extern void afs_fs_link(struct afs_operation *);
|
extern void afs_fs_symlink(struct afs_operation *);
|
extern void afs_fs_rename(struct afs_operation *);
|
extern void afs_fs_store_data(struct afs_operation *);
|
extern void afs_fs_setattr(struct afs_operation *);
|
extern void afs_fs_get_volume_status(struct afs_operation *);
|
extern void afs_fs_set_lock(struct afs_operation *);
|
extern void afs_fs_extend_lock(struct afs_operation *);
|
extern void afs_fs_release_lock(struct afs_operation *);
|
extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *,
|
struct afs_addr_cursor *, struct key *);
|
extern bool afs_fs_get_capabilities(struct afs_net *, struct afs_server *,
|
struct afs_addr_cursor *, struct key *);
|
extern void afs_fs_inline_bulk_status(struct afs_operation *);
|
|
struct afs_acl {
|
u32 size;
|
u8 data[];
|
};
|
|
extern void afs_fs_fetch_acl(struct afs_operation *);
|
extern void afs_fs_store_acl(struct afs_operation *);
|
|
/*
|
* fs_operation.c
|
*/
|
extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *);
|
extern int afs_put_operation(struct afs_operation *);
|
extern bool afs_begin_vnode_operation(struct afs_operation *);
|
extern void afs_wait_for_operation(struct afs_operation *);
|
extern int afs_do_sync_operation(struct afs_operation *);
|
|
static inline void afs_op_nomem(struct afs_operation *op)
|
{
|
op->error = -ENOMEM;
|
}
|
|
static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n,
|
struct afs_vnode *vnode)
|
{
|
op->file[n].vnode = vnode;
|
op->file[n].need_io_lock = true;
|
}
|
|
static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n,
|
const struct afs_fid *fid)
|
{
|
op->file[n].fid = *fid;
|
}
|
|
/*
|
* fs_probe.c
|
*/
|
extern void afs_fileserver_probe_result(struct afs_call *);
|
extern void afs_fs_probe_fileserver(struct afs_net *, struct afs_server *, struct key *, bool);
|
extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long);
|
extern void afs_probe_fileserver(struct afs_net *, struct afs_server *);
|
extern void afs_fs_probe_dispatcher(struct work_struct *);
|
extern int afs_wait_for_one_fs_probe(struct afs_server *, bool);
|
extern void afs_fs_probe_cleanup(struct afs_net *);
|
|
/*
|
* inode.c
|
*/
|
extern const struct afs_operation_ops afs_fetch_status_operation;
|
|
extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *);
|
extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *);
|
extern int afs_ilookup5_test_by_fid(struct inode *, void *);
|
extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool);
|
extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *);
|
extern struct inode *afs_root_iget(struct super_block *, struct key *);
|
extern bool afs_check_validity(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 int afs_net_id;
|
|
static inline struct afs_net *afs_net(struct net *net)
|
{
|
return net_generic(net, afs_net_id);
|
}
|
|
static inline struct afs_net *afs_sb2net(struct super_block *sb)
|
{
|
return afs_net(AFS_FS_S(sb)->net_ns);
|
}
|
|
static inline struct afs_net *afs_d2net(struct dentry *dentry)
|
{
|
return afs_sb2net(dentry->d_sb);
|
}
|
|
static inline struct afs_net *afs_i2net(struct inode *inode)
|
{
|
return afs_sb2net(inode->i_sb);
|
}
|
|
static inline struct afs_net *afs_v2net(struct afs_vnode *vnode)
|
{
|
return afs_i2net(&vnode->vfs_inode);
|
}
|
|
static inline struct afs_net *afs_sock2net(struct sock *sk)
|
{
|
return net_generic(sock_net(sk), afs_net_id);
|
}
|
|
static inline void __afs_stat(atomic_t *s)
|
{
|
atomic_inc(s);
|
}
|
|
#define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n)
|
|
/*
|
* misc.c
|
*/
|
extern int afs_abort_to_error(u32);
|
extern void afs_prioritise_error(struct afs_error *, int, 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);
|
|
/*
|
* proc.c
|
*/
|
#ifdef CONFIG_PROC_FS
|
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_cell *);
|
extern void afs_proc_cell_remove(struct afs_cell *);
|
extern void afs_put_sysnames(struct afs_sysnames *);
|
#else
|
static inline int afs_proc_init(struct afs_net *net) { return 0; }
|
static inline void afs_proc_cleanup(struct afs_net *net) {}
|
static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; }
|
static inline void afs_proc_cell_remove(struct afs_cell *cell) {}
|
static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {}
|
#endif
|
|
/*
|
* rotate.c
|
*/
|
extern bool afs_select_fileserver(struct afs_operation *);
|
extern void afs_dump_edestaddrreq(const struct afs_operation *);
|
|
/*
|
* 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 void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t);
|
extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *);
|
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 *, bool);
|
extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause);
|
|
static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call,
|
gfp_t gfp)
|
{
|
op->call = call;
|
op->type = call->type;
|
call->op = op;
|
call->key = op->key;
|
call->intr = !(op->flags & AFS_OPERATION_UNINTR);
|
afs_make_call(&op->ac, call, gfp);
|
}
|
|
static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size)
|
{
|
call->kvec[0].iov_base = buf;
|
call->kvec[0].iov_len = size;
|
iov_iter_kvec(&call->def_iter, READ, call->kvec, 1, size);
|
}
|
|
static inline void afs_extract_to_tmp(struct afs_call *call)
|
{
|
afs_extract_begin(call, &call->tmp, sizeof(call->tmp));
|
}
|
|
static inline void afs_extract_to_tmp64(struct afs_call *call)
|
{
|
afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64));
|
}
|
|
static inline void afs_extract_discard(struct afs_call *call, size_t size)
|
{
|
iov_iter_discard(&call->def_iter, READ, size);
|
}
|
|
static inline void afs_extract_to_buf(struct afs_call *call, size_t size)
|
{
|
afs_extract_begin(call, call->buffer, size);
|
}
|
|
static inline int afs_transfer_reply(struct afs_call *call)
|
{
|
return afs_extract_data(call, 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);
|
|
/* Asynchronous calls have two refs to release - one from the alloc and
|
* one queued with the work item - and we can't just deallocate the
|
* call because the work item may be queued again.
|
*/
|
if (call->drop_ref)
|
afs_put_call(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,
|
struct afs_status_cb *);
|
extern void afs_zap_permits(struct rcu_head *);
|
extern struct key *afs_request_key(struct afs_cell *);
|
extern struct key *afs_request_key_rcu(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;
|
|
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 *, u32);
|
extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace);
|
extern struct afs_server *afs_use_server(struct afs_server *, enum afs_server_trace);
|
extern void afs_unuse_server(struct afs_net *, struct afs_server *, enum afs_server_trace);
|
extern void afs_unuse_server_notime(struct afs_net *, struct afs_server *, enum afs_server_trace);
|
extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace);
|
extern void afs_manage_servers(struct work_struct *);
|
extern void afs_servers_timer(struct timer_list *);
|
extern void afs_fs_probe_timer(struct timer_list *);
|
extern void __net_exit afs_purge_servers(struct afs_net *);
|
extern bool afs_check_server_record(struct afs_operation *, struct afs_server *);
|
|
static inline void afs_inc_servers_outstanding(struct afs_net *net)
|
{
|
atomic_inc(&net->servers_outstanding);
|
}
|
|
static inline void afs_dec_servers_outstanding(struct afs_net *net)
|
{
|
if (atomic_dec_and_test(&net->servers_outstanding))
|
wake_up_var(&net->servers_outstanding);
|
}
|
|
static inline bool afs_is_probing_server(struct afs_server *server)
|
{
|
return list_empty(&server->probe_link);
|
}
|
|
/*
|
* 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 afs_fs_exit(void);
|
|
/*
|
* vlclient.c
|
*/
|
extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *,
|
const char *, int);
|
extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *);
|
extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *,
|
struct key *, struct afs_vlserver *, unsigned int);
|
extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *);
|
extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *);
|
|
/*
|
* vl_alias.c
|
*/
|
extern int afs_cell_detect_alias(struct afs_cell *, struct key *);
|
|
/*
|
* vl_probe.c
|
*/
|
extern void afs_vlserver_probe_result(struct afs_call *);
|
extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *);
|
extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long);
|
|
/*
|
* vl_rotate.c
|
*/
|
extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *,
|
struct afs_cell *, struct key *);
|
extern bool afs_select_vlserver(struct afs_vl_cursor *);
|
extern bool afs_select_current_vlserver(struct afs_vl_cursor *);
|
extern int afs_end_vlserver_operation(struct afs_vl_cursor *);
|
|
/*
|
* vlserver_list.c
|
*/
|
static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver)
|
{
|
atomic_inc(&vlserver->usage);
|
return vlserver;
|
}
|
|
static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist)
|
{
|
if (vllist)
|
atomic_inc(&vllist->usage);
|
return vllist;
|
}
|
|
extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short);
|
extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *);
|
extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int);
|
extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *);
|
extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *,
|
const void *, size_t);
|
|
/*
|
* volume.c
|
*/
|
extern struct afs_volume *afs_create_volume(struct afs_fs_context *);
|
extern void afs_activate_volume(struct afs_volume *);
|
extern void afs_deactivate_volume(struct afs_volume *);
|
extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace);
|
extern void afs_put_volume(struct afs_net *, struct afs_volume *, enum afs_volume_trace);
|
extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *);
|
|
/*
|
* 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 ssize_t afs_file_write(struct kiocb *, struct iov_iter *);
|
extern int afs_fsync(struct file *, loff_t, loff_t, int);
|
extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf);
|
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[];
|
|
/*
|
* yfsclient.c
|
*/
|
extern void yfs_fs_fetch_data(struct afs_operation *);
|
extern void yfs_fs_create_file(struct afs_operation *);
|
extern void yfs_fs_make_dir(struct afs_operation *);
|
extern void yfs_fs_remove_file2(struct afs_operation *);
|
extern void yfs_fs_remove_file(struct afs_operation *);
|
extern void yfs_fs_remove_dir(struct afs_operation *);
|
extern void yfs_fs_link(struct afs_operation *);
|
extern void yfs_fs_symlink(struct afs_operation *);
|
extern void yfs_fs_rename(struct afs_operation *);
|
extern void yfs_fs_store_data(struct afs_operation *);
|
extern void yfs_fs_setattr(struct afs_operation *);
|
extern void yfs_fs_get_volume_status(struct afs_operation *);
|
extern void yfs_fs_set_lock(struct afs_operation *);
|
extern void yfs_fs_extend_lock(struct afs_operation *);
|
extern void yfs_fs_release_lock(struct afs_operation *);
|
extern void yfs_fs_fetch_status(struct afs_operation *);
|
extern void yfs_fs_inline_bulk_status(struct afs_operation *);
|
|
struct yfs_acl {
|
struct afs_acl *acl; /* Dir/file/symlink ACL */
|
struct afs_acl *vol_acl; /* Whole volume ACL */
|
u32 inherit_flag; /* True if ACL is inherited from parent dir */
|
u32 num_cleaned; /* Number of ACEs removed due to subject removal */
|
unsigned int flags;
|
#define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */
|
#define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */
|
};
|
|
extern void yfs_free_opaque_acl(struct yfs_acl *);
|
extern void yfs_fs_fetch_opaque_acl(struct afs_operation *);
|
extern void yfs_fs_store_opaque_acl2(struct afs_operation *);
|
|
/*
|
* 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;
|
}
|
|
/*
|
* Note that a dentry got changed. We need to set d_fsdata to the data version
|
* number derived from the result of the operation. It doesn't matter if
|
* d_fsdata goes backwards as we'll just revalidate.
|
*/
|
static inline void afs_update_dentry_version(struct afs_operation *op,
|
struct afs_vnode_param *dir_vp,
|
struct dentry *dentry)
|
{
|
if (!op->error)
|
dentry->d_fsdata =
|
(void *)(unsigned long)dir_vp->scb.status.data_version;
|
}
|
|
/*
|
* Set the file size and block count. Estimate the number of 512 bytes blocks
|
* used, rounded up to nearest 1K for consistency with other AFS clients.
|
*/
|
static inline void afs_set_i_size(struct afs_vnode *vnode, u64 size)
|
{
|
i_size_write(&vnode->vfs_inode, size);
|
vnode->vfs_inode.i_blocks = ((size + 1023) >> 10) << 1;
|
}
|
|
/*
|
* Check for a conflicting operation on a directory that we just unlinked from.
|
* If someone managed to sneak a link or an unlink in on the file we just
|
* unlinked, we won't be able to trust nlink on an AFS file (but not YFS).
|
*/
|
static inline void afs_check_dir_conflict(struct afs_operation *op,
|
struct afs_vnode_param *dvp)
|
{
|
if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version)
|
op->flags |= AFS_OPERATION_DIR_CONFLICT;
|
}
|
|
static inline int afs_io_error(struct afs_call *call, enum afs_io_error where)
|
{
|
trace_afs_io_error(call->debug_id, -EIO, where);
|
return -EIO;
|
}
|
|
static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where)
|
{
|
trace_afs_file_error(vnode, -EIO, where);
|
return -EIO;
|
}
|
|
/*****************************************************************************/
|
/*
|
* 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 */
|
