blob: 3c8373f90ab3150f2530a795b977c1489a344771 [file] [log] [blame]
David Howellsf7b422b2006-06-09 09:34:33 -04001/*
2 * NFS internal definitions
3 */
4
Andy Adamsoneedc0202009-04-01 09:22:41 -04005#include "nfs4_fs.h"
David Howellsf7b422b2006-06-09 09:34:33 -04006#include <linux/mount.h>
Eric Parisf9c3a382008-03-05 14:20:18 -05007#include <linux/security.h>
David Howellsf7b422b2006-06-09 09:34:33 -04008
David Howells08734042009-04-03 16:42:42 +01009#define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS)
10
David Howells54ceac42006-08-22 20:06:13 -040011struct nfs_string;
David Howells54ceac42006-08-22 20:06:13 -040012
13/* Maximum number of readahead requests
14 * FIXME: this should really be a sysctl so that users may tune it to suit
15 * their needs. People that do NFS over a slow network, might for
16 * instance want to reduce it to something closer to 1 for improved
17 * interactive response.
18 */
19#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
20
Bryan Schumaker7ebb9312011-03-24 17:12:30 +000021static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr)
22{
23 if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid))
24 fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT;
25}
26
Andy Adamson533eb462011-06-13 18:25:56 -040027static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr)
28{
29 if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) ||
30 (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) &&
31 ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0)))
32 return 0;
33
34 fattr->fileid = fattr->mounted_on_fileid;
35 return 1;
36}
37
David Howellsf7b422b2006-06-09 09:34:33 -040038struct nfs_clone_mount {
39 const struct super_block *sb;
40 const struct dentry *dentry;
41 struct nfs_fh *fh;
42 struct nfs_fattr *fattr;
43 char *hostname;
44 char *mnt_path;
Chuck Lever6677d092007-12-10 14:59:06 -050045 struct sockaddr *addr;
46 size_t addrlen;
David Howellsf7b422b2006-06-09 09:34:33 -040047 rpc_authflavor_t authflavor;
48};
49
\"Talpey, Thomas\6b18eaa2007-09-10 13:43:29 -040050/*
Chuck Levera14017d2009-06-17 18:02:12 -070051 * Note: RFC 1813 doesn't limit the number of auth flavors that
52 * a server can return, so make something up.
53 */
54#define NFS_MAX_SECFLAVORS (12)
55
56/*
Chuck Lever4cfd74f2009-09-08 19:49:47 -040057 * Value used if the user did not specify a port value.
58 */
59#define NFS_UNSPEC_PORT (-1)
60
61/*
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -040062 * Maximum number of pages that readdir can use for creating
63 * a vmapped array of pages.
64 */
65#define NFS_MAX_READDIR_PAGES 8
66
Bryan Schumakerfcf10392012-07-16 16:39:18 -040067struct nfs_client_initdata {
68 unsigned long init_flags;
69 const char *hostname;
70 const struct sockaddr *addr;
71 size_t addrlen;
Bryan Schumakerab7017a2012-07-30 16:05:16 -040072 struct nfs_subversion *nfs_mod;
Bryan Schumakerfcf10392012-07-16 16:39:18 -040073 int proto;
74 u32 minorversion;
75 struct net *net;
76};
77
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -040078/*
\"Talpey, Thomas\6b18eaa2007-09-10 13:43:29 -040079 * In-kernel mount arguments
80 */
81struct nfs_parsed_mount_data {
82 int flags;
Chuck Lever8cb7f742012-09-14 17:23:14 -040083 unsigned int rsize, wsize;
84 unsigned int timeo, retrans;
85 unsigned int acregmin, acregmax,
\"Talpey, Thomas\6b18eaa2007-09-10 13:43:29 -040086 acdirmin, acdirmax;
Chuck Lever8cb7f742012-09-14 17:23:14 -040087 unsigned int namlen;
David Howellsb797cac2009-04-03 16:42:48 +010088 unsigned int options;
\"Talpey, Thomas\6b18eaa2007-09-10 13:43:29 -040089 unsigned int bsize;
90 unsigned int auth_flavor_len;
91 rpc_authflavor_t auth_flavors[1];
92 char *client_address;
Chuck Lever764302c2009-09-08 19:50:03 -040093 unsigned int version;
Mike Sager3fd5be92009-04-01 09:21:48 -040094 unsigned int minorversion;
David Howells08734042009-04-03 16:42:42 +010095 char *fscache_uniq;
Bryan Schumakerb72e4f42012-05-10 15:07:40 -040096 bool need_mount;
\"Talpey, Thomas\6b18eaa2007-09-10 13:43:29 -040097
98 struct {
Chuck Lever4c568012007-12-10 14:59:28 -050099 struct sockaddr_storage address;
100 size_t addrlen;
\"Talpey, Thomas\6b18eaa2007-09-10 13:43:29 -0400101 char *hostname;
Chuck Lever78fa7012008-03-14 14:10:15 -0400102 u32 version;
Chuck Lever4cfd74f2009-09-08 19:49:47 -0400103 int port;
Chuck Lever78fa7012008-03-14 14:10:15 -0400104 unsigned short protocol;
\"Talpey, Thomas\6b18eaa2007-09-10 13:43:29 -0400105 } mount_server;
106
107 struct {
Chuck Lever4c568012007-12-10 14:59:28 -0500108 struct sockaddr_storage address;
109 size_t addrlen;
\"Talpey, Thomas\6b18eaa2007-09-10 13:43:29 -0400110 char *hostname;
111 char *export_path;
Chuck Lever4cfd74f2009-09-08 19:49:47 -0400112 int port;
Chuck Lever78fa7012008-03-14 14:10:15 -0400113 unsigned short protocol;
\"Talpey, Thomas\6b18eaa2007-09-10 13:43:29 -0400114 } nfs_server;
Eric Parisf9c3a382008-03-05 14:20:18 -0500115
116 struct security_mnt_opts lsm_opts;
Stanislav Kinsburskye50a7a12012-01-10 16:12:46 +0400117 struct net *net;
\"Talpey, Thomas\6b18eaa2007-09-10 13:43:29 -0400118};
119
Chuck Lever146ec942008-12-23 15:21:34 -0500120/* mount_clnt.c */
Chuck Leverc5d120f2008-12-23 15:21:35 -0500121struct nfs_mount_request {
122 struct sockaddr *sap;
123 size_t salen;
124 char *hostname;
125 char *dirpath;
126 u32 version;
127 unsigned short protocol;
128 struct nfs_fh *fh;
Chuck Lever50a737f2008-12-23 15:21:37 -0500129 int noresvport;
Chuck Lever8e02f6b2009-06-17 18:02:13 -0700130 unsigned int *auth_flav_len;
131 rpc_authflavor_t *auth_flavs;
Stanislav Kinsbursky6d59b8d2012-01-10 16:12:54 +0400132 struct net *net;
Chuck Leverc5d120f2008-12-23 15:21:35 -0500133};
134
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400135struct nfs_mount_info {
136 void (*fill_super)(struct super_block *, struct nfs_mount_info *);
137 int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *);
138 struct nfs_parsed_mount_data *parsed;
139 struct nfs_clone_mount *cloned;
140 struct nfs_fh *mntfh;
141};
142
Chuck Leverc5d120f2008-12-23 15:21:35 -0500143extern int nfs_mount(struct nfs_mount_request *info);
Chuck Lever0b524122009-08-09 15:09:30 -0400144extern void nfs_umount(const struct nfs_mount_request *info);
Chuck Lever146ec942008-12-23 15:21:34 -0500145
David Howells24c8dbb2006-08-22 20:06:10 -0400146/* client.c */
Trond Myklebusta613fa12012-01-20 13:53:56 -0500147extern const struct rpc_program nfs_program;
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +0000148extern void nfs_clients_init(struct net *net);
Bryan Schumaker6663ee72012-06-20 15:53:46 -0400149extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *);
Bryan Schumaker428360d2012-07-16 16:39:17 -0400150int nfs_create_rpc_client(struct nfs_client *, const struct rpc_timeout *, rpc_authflavor_t);
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400151struct nfs_client *nfs_get_client(const struct nfs_client_initdata *,
152 const struct rpc_timeout *, const char *,
153 rpc_authflavor_t);
154int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *);
155void nfs_server_insert_lists(struct nfs_server *);
156void nfs_init_timeout_values(struct rpc_timeout *, int, unsigned int, unsigned int);
157int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t,
158 rpc_authflavor_t);
159struct nfs_server *nfs_alloc_server(void);
160void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *);
David Howells54ceac42006-08-22 20:06:13 -0400161
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000162extern void nfs_cleanup_cb_ident_idr(struct net *);
David Howells24c8dbb2006-08-22 20:06:10 -0400163extern void nfs_put_client(struct nfs_client *);
Bryan Schumakercdb7ece2012-06-20 15:53:45 -0400164extern void nfs_free_client(struct nfs_client *);
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000165extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
Andy Adamsonc36fca52011-01-06 02:04:32 +0000166extern struct nfs_client *
Stanislav Kinsburskyc7add9a2012-01-26 15:11:49 +0400167nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
Bryan Schumaker459de2e2013-06-05 11:15:01 -0400168 struct nfs4_sessionid *, u32);
Bryan Schumaker1179acc2012-07-30 16:05:19 -0400169extern struct nfs_server *nfs_create_server(struct nfs_mount_info *,
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400170 struct nfs_subversion *);
\"Talpey, Thomas\91ea40b2007-09-10 13:44:33 -0400171extern struct nfs_server *nfs4_create_server(
Bryan Schumaker1179acc2012-07-30 16:05:19 -0400172 struct nfs_mount_info *,
173 struct nfs_subversion *);
David Howells54ceac42006-08-22 20:06:13 -0400174extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *,
175 struct nfs_fh *);
176extern void nfs_free_server(struct nfs_server *server);
177extern struct nfs_server *nfs_clone_server(struct nfs_server *,
178 struct nfs_fh *,
Bryan Schumaker7e6eb682012-04-27 13:27:42 -0400179 struct nfs_fattr *,
180 rpc_authflavor_t);
Trond Myklebust4697bd52012-05-23 13:24:36 -0400181extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
Andy Adamson76db6d92009-04-01 09:22:38 -0400182extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
Andy Adamsond83217c2011-03-01 01:34:17 +0000183extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
184 const struct sockaddr *ds_addr,
Andy Adamson98fc6852012-04-27 17:53:45 -0400185 int ds_addrlen, int ds_proto,
186 unsigned int ds_timeo,
187 unsigned int ds_retrans);
David Howells6aaca562006-08-22 20:06:13 -0400188#ifdef CONFIG_PROC_FS
189extern int __init nfs_fs_proc_init(void);
190extern void nfs_fs_proc_exit(void);
191#else
192static inline int nfs_fs_proc_init(void)
193{
194 return 0;
195}
196static inline void nfs_fs_proc_exit(void)
197{
198}
199#endif
David Howells24c8dbb2006-08-22 20:06:10 -0400200
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400201#ifdef CONFIG_NFS_V4_1
202int nfs_sockaddr_match_ipaddr(const struct sockaddr *, const struct sockaddr *);
203#endif
204
Bryan Schumaker1179acc2012-07-30 16:05:19 -0400205/* nfs3client.c */
Bryan Schumaker1c606fb2012-07-30 16:05:24 -0400206#if IS_ENABLED(CONFIG_NFS_V3)
Bryan Schumaker1179acc2012-07-30 16:05:19 -0400207struct nfs_server *nfs3_create_server(struct nfs_mount_info *, struct nfs_subversion *);
208struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *,
209 struct nfs_fattr *, rpc_authflavor_t);
210#endif
211
David Howellsf7b422b2006-06-09 09:34:33 -0400212/* callback_xdr.c */
213extern struct svc_version nfs4_callback_version1;
Alexandros Batsakis07bccc22009-12-05 13:19:01 -0500214extern struct svc_version nfs4_callback_version4;
David Howellsf7b422b2006-06-09 09:34:33 -0400215
Fred Isaman4db6e0b2012-04-20 14:47:46 -0400216struct nfs_pageio_descriptor;
David Howellsf7b422b2006-06-09 09:34:33 -0400217/* pagelist.c */
218extern int __init nfs_init_nfspagecache(void);
David Brownell266bee82006-06-27 12:59:15 -0700219extern void nfs_destroy_nfspagecache(void);
David Howellsf7b422b2006-06-09 09:34:33 -0400220extern int __init nfs_init_readpagecache(void);
David Brownell266bee82006-06-27 12:59:15 -0700221extern void nfs_destroy_readpagecache(void);
David Howellsf7b422b2006-06-09 09:34:33 -0400222extern int __init nfs_init_writepagecache(void);
David Brownell266bee82006-06-27 12:59:15 -0700223extern void nfs_destroy_writepagecache(void);
David Howellsf7b422b2006-06-09 09:34:33 -0400224
David Howellsf7b422b2006-06-09 09:34:33 -0400225extern int __init nfs_init_directcache(void);
David Brownell266bee82006-06-27 12:59:15 -0700226extern void nfs_destroy_directcache(void);
Fred Isaman30dd3742012-04-20 14:47:45 -0400227extern bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount);
Fred Isaman4db6e0b2012-04-20 14:47:46 -0400228extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
229 struct nfs_pgio_header *hdr,
230 void (*release)(struct nfs_pgio_header *hdr));
231void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
Trond Myklebust577b4232013-04-08 21:38:12 -0400232int nfs_iocounter_wait(struct nfs_io_counter *c);
233
234static inline void nfs_iocounter_init(struct nfs_io_counter *c)
235{
236 c->flags = 0;
237 atomic_set(&c->io_count, 0);
238}
David Howellsf7b422b2006-06-09 09:34:33 -0400239
240/* nfs2xdr.c */
241extern struct rpc_procinfo nfs_procedures[];
Chuck Lever573c4e12010-12-14 14:58:11 +0000242extern int nfs2_decode_dirent(struct xdr_stream *,
243 struct nfs_entry *, int);
David Howellsf7b422b2006-06-09 09:34:33 -0400244
245/* nfs3xdr.c */
246extern struct rpc_procinfo nfs3_procedures[];
Chuck Lever573c4e12010-12-14 14:58:11 +0000247extern int nfs3_decode_dirent(struct xdr_stream *,
248 struct nfs_entry *, int);
David Howellsf7b422b2006-06-09 09:34:33 -0400249
250/* nfs4xdr.c */
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400251#if IS_ENABLED(CONFIG_NFS_V4)
Chuck Lever573c4e12010-12-14 14:58:11 +0000252extern int nfs4_decode_dirent(struct xdr_stream *,
253 struct nfs_entry *, int);
David Howells7d4e2742006-08-22 20:06:07 -0400254#endif
Alexandros Batsakis2449ea22009-12-05 13:36:55 -0500255#ifdef CONFIG_NFS_V4_1
256extern const u32 nfs41_maxread_overhead;
257extern const u32 nfs41_maxwrite_overhead;
Andy Adamsonf1c097b2013-06-25 19:02:53 -0400258extern const u32 nfs41_maxgetdevinfo_overhead;
Alexandros Batsakis2449ea22009-12-05 13:36:55 -0500259#endif
David Howellsf7b422b2006-06-09 09:34:33 -0400260
261/* nfs4proc.c */
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400262#if IS_ENABLED(CONFIG_NFS_V4)
David Howellsf7b422b2006-06-09 09:34:33 -0400263extern struct rpc_procinfo nfs4_procedures[];
Andrew Mortond75d5412006-06-25 02:41:26 -0700264#endif
David Howellsf7b422b2006-06-09 09:34:33 -0400265
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400266/* proc.c */
267void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400268extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
Andy Adamson45a52a02011-03-01 01:34:08 +0000269 const struct rpc_timeout *timeparms,
Chuck Lever4bf590e2012-05-21 22:46:07 -0400270 const char *ip_addr, rpc_authflavor_t authflavour);
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400271
Trond Myklebust979df722006-07-25 11:28:19 -0400272/* dir.c */
Dave Chinner7f8275d2010-07-19 14:56:17 +1000273extern int nfs_access_cache_shrinker(struct shrinker *shrink,
Ying Han1495f232011-05-24 17:12:27 -0700274 struct shrink_control *sc);
Bryan Schumaker597d9282012-07-16 16:39:10 -0400275struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
276int nfs_create(struct inode *, struct dentry *, umode_t, bool);
277int nfs_mkdir(struct inode *, struct dentry *, umode_t);
278int nfs_rmdir(struct inode *, struct dentry *);
279int nfs_unlink(struct inode *, struct dentry *);
280int nfs_symlink(struct inode *, struct dentry *, const char *);
281int nfs_link(struct dentry *, struct inode *, struct dentry *);
282int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
283int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
Trond Myklebust979df722006-07-25 11:28:19 -0400284
Bryan Schumakerce4ef7c2012-07-16 16:39:15 -0400285/* file.c */
286int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int);
287loff_t nfs_file_llseek(struct file *, loff_t, int);
288int nfs_file_flush(struct file *, fl_owner_t);
289ssize_t nfs_file_read(struct kiocb *, const struct iovec *, unsigned long, loff_t);
290ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *,
291 size_t, unsigned int);
292int nfs_file_mmap(struct file *, struct vm_area_struct *);
293ssize_t nfs_file_write(struct kiocb *, const struct iovec *, unsigned long, loff_t);
294int nfs_file_release(struct inode *, struct file *);
295int nfs_lock(struct file *, int, struct file_lock *);
296int nfs_flock(struct file *, int, struct file_lock *);
297ssize_t nfs_file_splice_write(struct pipe_inode_info *, struct file *, loff_t *,
298 size_t, unsigned int);
299int nfs_check_flags(int);
300int nfs_setlease(struct file *, long, struct file_lock **);
301
David Howellsf7b422b2006-06-09 09:34:33 -0400302/* inode.c */
Trond Myklebust57460062008-02-19 20:04:22 -0500303extern struct workqueue_struct *nfsiod_workqueue;
David Howellsf7b422b2006-06-09 09:34:33 -0400304extern struct inode *nfs_alloc_inode(struct super_block *sb);
305extern void nfs_destroy_inode(struct inode *);
Christoph Hellwiga9185b42010-03-05 09:21:37 +0100306extern int nfs_write_inode(struct inode *, struct writeback_control *);
Trond Myklebusteed99352012-12-14 14:36:36 -0500307extern int nfs_drop_inode(struct inode *);
Bryan Schumaker19d87ca2012-07-30 16:05:21 -0400308extern void nfs_clear_inode(struct inode *);
Al Virob57922d2010-06-07 14:34:48 -0400309extern void nfs_evict_inode(struct inode *);
Trond Myklebustf41f7412008-06-11 17:39:04 -0400310void nfs_zap_acl_cache(struct inode *inode);
Trond Myklebust72cb77f2009-03-11 14:10:30 -0400311extern int nfs_wait_bit_killable(void *word);
David Howellsf7b422b2006-06-09 09:34:33 -0400312
313/* super.c */
Bryan Schumaker6a744902012-07-30 16:05:20 -0400314extern const struct super_operations nfs_sops;
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400315extern struct file_system_type nfs_fs_type;
David Howells54ceac42006-08-22 20:06:13 -0400316extern struct file_system_type nfs_xdev_fs_type;
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400317#if IS_ENABLED(CONFIG_NFS_V4)
David Howells54ceac42006-08-22 20:06:13 -0400318extern struct file_system_type nfs4_xdev_fs_type;
319extern struct file_system_type nfs4_referral_fs_type;
David Howellsf7b422b2006-06-09 09:34:33 -0400320#endif
Bryan Schumakerff9099f22012-07-30 16:05:18 -0400321struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *,
322 struct nfs_subversion *);
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400323void nfs_initialise_sb(struct super_block *);
324int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
325int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400326struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *,
327 struct nfs_mount_info *, struct nfs_subversion *);
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400328struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *);
329struct dentry * nfs_xdev_mount_common(struct file_system_type *, int,
330 const char *, struct nfs_mount_info *);
331void nfs_kill_super(struct super_block *);
332void nfs_fill_super(struct super_block *, struct nfs_mount_info *);
Dominik Hackl4ebd9ab2006-07-02 17:29:26 +0200333
David Howellsf7b422b2006-06-09 09:34:33 -0400334extern struct rpc_stat nfs_rpcstat;
Dominik Hackl4ebd9ab2006-07-02 17:29:26 +0200335
David Howellsf7b422b2006-06-09 09:34:33 -0400336extern int __init register_nfs_fs(void);
337extern void __exit unregister_nfs_fs(void);
Trond Myklebust1daef0a2008-07-27 18:19:01 -0400338extern void nfs_sb_active(struct super_block *sb);
339extern void nfs_sb_deactive(struct super_block *sb);
David Howellsf7b422b2006-06-09 09:34:33 -0400340
341/* namespace.c */
Ben Hutchings97a54862012-10-21 19:23:52 +0100342#define NFS_PATH_CANONICAL 1
Al Virob514f872011-03-16 06:26:11 -0400343extern char *nfs_path(char **p, struct dentry *dentry,
Ben Hutchings97a54862012-10-21 19:23:52 +0100344 char *buffer, ssize_t buflen, unsigned flags);
David Howells36d43a42011-01-14 18:45:42 +0000345extern struct vfsmount *nfs_d_automount(struct path *path);
Bryan Schumaker281cad42012-04-27 13:27:45 -0400346struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *,
347 struct nfs_fh *, struct nfs_fattr *);
348struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *,
349 struct nfs_fattr *, rpc_authflavor_t);
David Howellsf7b422b2006-06-09 09:34:33 -0400350
David Howells54ceac42006-08-22 20:06:13 -0400351/* getroot.c */
Al Viro0d5839a2011-03-16 05:27:27 -0400352extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *,
353 const char *);
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400354#if IS_ENABLED(CONFIG_NFS_V4)
Al Viro0d5839a2011-03-16 05:27:27 -0400355extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *,
356 const char *);
David Howells54ceac42006-08-22 20:06:13 -0400357
Trond Myklebust815409d2010-04-16 16:22:46 -0400358extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh);
David Howells7d4e2742006-08-22 20:06:07 -0400359#endif
David Howellsf7b422b2006-06-09 09:34:33 -0400360
Fred Isaman061ae2e2012-04-20 14:47:48 -0400361struct nfs_pgio_completion_ops;
Andy Adamsonf11c88a2009-04-01 09:22:25 -0400362/* read.c */
Fred Isaman4db6e0b2012-04-20 14:47:46 -0400363extern struct nfs_read_header *nfs_readhdr_alloc(void);
Fred Isamancd841602012-04-20 14:47:44 -0400364extern void nfs_readhdr_free(struct nfs_pgio_header *hdr);
Fred Isaman584aa812012-04-20 14:47:51 -0400365extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
366 struct inode *inode,
367 const struct nfs_pgio_completion_ops *compl_ops);
Fred Isamanc5996c42012-04-20 14:47:41 -0400368extern int nfs_initiate_read(struct rpc_clnt *clnt,
369 struct nfs_read_data *data,
Andy Adamson9f0ec1762012-04-27 17:53:44 -0400370 const struct rpc_call_ops *call_ops, int flags);
Andy Adamsonf11c88a2009-04-01 09:22:25 -0400371extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
Trond Myklebust493292d2011-07-13 15:58:28 -0400372extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc,
Fred Isaman4db6e0b2012-04-20 14:47:46 -0400373 struct nfs_pgio_header *hdr);
Trond Myklebust493292d2011-07-13 15:58:28 -0400374extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
375extern void nfs_readdata_release(struct nfs_read_data *rdata);
Trond Myklebuste885de12011-06-10 13:30:23 -0400376
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400377/* super.c */
378void nfs_clone_super(struct super_block *, struct nfs_mount_info *);
379void nfs_umount_begin(struct super_block *);
380int nfs_statfs(struct dentry *, struct kstatfs *);
381int nfs_show_options(struct seq_file *, struct dentry *);
382int nfs_show_devname(struct seq_file *, struct dentry *);
383int nfs_show_path(struct seq_file *, struct dentry *);
384int nfs_show_stats(struct seq_file *, struct dentry *);
385void nfs_put_super(struct super_block *);
386int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
387
Andy Adamsondef6ed72009-04-01 09:22:26 -0400388/* write.c */
Fred Isaman1763da12012-04-20 14:47:57 -0400389extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
390 struct inode *inode, int ioflags,
391 const struct nfs_pgio_completion_ops *compl_ops);
Fred Isaman6c75dc02012-04-20 14:47:47 -0400392extern struct nfs_write_header *nfs_writehdr_alloc(void);
Fred Isamancd841602012-04-20 14:47:44 -0400393extern void nfs_writehdr_free(struct nfs_pgio_header *hdr);
Trond Myklebustdce81292011-07-13 15:59:19 -0400394extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc,
Fred Isaman6c75dc02012-04-20 14:47:47 -0400395 struct nfs_pgio_header *hdr);
Trond Myklebustdce81292011-07-13 15:59:19 -0400396extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
397extern void nfs_writedata_release(struct nfs_write_data *wdata);
Fred Isaman0b7c0152012-04-20 14:47:39 -0400398extern void nfs_commit_free(struct nfs_commit_data *p);
Fred Isamanc5996c42012-04-20 14:47:41 -0400399extern int nfs_initiate_write(struct rpc_clnt *clnt,
400 struct nfs_write_data *data,
Fred Isamana69aef12011-03-03 15:13:47 +0000401 const struct rpc_call_ops *call_ops,
Andy Adamson9f0ec1762012-04-27 17:53:44 -0400402 int how, int flags);
Andy Adamsondef6ed72009-04-01 09:22:26 -0400403extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
Fred Isaman0b7c0152012-04-20 14:47:39 -0400404extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
405extern int nfs_initiate_commit(struct rpc_clnt *clnt,
406 struct nfs_commit_data *data,
Fred Isamane0c2b382011-03-23 13:27:53 +0000407 const struct rpc_call_ops *call_ops,
Andy Adamson9f0ec1762012-04-27 17:53:44 -0400408 int how, int flags);
Fred Isaman0b7c0152012-04-20 14:47:39 -0400409extern void nfs_init_commit(struct nfs_commit_data *data,
Fred Isamane0c2b382011-03-23 13:27:53 +0000410 struct list_head *head,
Fred Isamanf453a542012-04-20 14:47:54 -0400411 struct pnfs_layout_segment *lseg,
412 struct nfs_commit_info *cinfo);
Fred Isaman1763da12012-04-20 14:47:57 -0400413int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
414 struct nfs_commit_info *cinfo, int max);
415int nfs_scan_commit(struct inode *inode, struct list_head *dst,
416 struct nfs_commit_info *cinfo);
417void nfs_mark_request_commit(struct nfs_page *req,
418 struct pnfs_layout_segment *lseg,
419 struct nfs_commit_info *cinfo);
420int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
421 int how, struct nfs_commit_info *cinfo);
Fred Isamane0c2b382011-03-23 13:27:53 +0000422void nfs_retry_commit(struct list_head *page_list,
Fred Isamanea2cf222012-04-20 14:47:53 -0400423 struct pnfs_layout_segment *lseg,
424 struct nfs_commit_info *cinfo);
Fred Isaman0b7c0152012-04-20 14:47:39 -0400425void nfs_commitdata_release(struct nfs_commit_data *data);
Fred Isamanea2cf222012-04-20 14:47:53 -0400426void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst,
427 struct nfs_commit_info *cinfo);
428void nfs_request_remove_commit_list(struct nfs_page *req,
429 struct nfs_commit_info *cinfo);
430void nfs_init_cinfo(struct nfs_commit_info *cinfo,
431 struct inode *inode,
432 struct nfs_direct_req *dreq);
Fred Isamane0c2b382011-03-23 13:27:53 +0000433
Trond Myklebust074cc1d2009-08-10 08:54:13 -0400434#ifdef CONFIG_MIGRATION
435extern int nfs_migrate_page(struct address_space *,
Mel Gormana6bc32b2012-01-12 17:19:43 -0800436 struct page *, struct page *, enum migrate_mode);
Trond Myklebust074cc1d2009-08-10 08:54:13 -0400437#else
438#define nfs_migrate_page NULL
439#endif
Andy Adamsondef6ed72009-04-01 09:22:26 -0400440
Fred Isaman1763da12012-04-20 14:47:57 -0400441/* direct.c */
442void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
443 struct nfs_direct_req *dreq);
Trond Myklebust1d59d612012-05-31 12:22:33 -0400444static inline void nfs_inode_dio_wait(struct inode *inode)
445{
446 inode_dio_wait(inode);
447}
Peng Tao62965562012-09-25 14:55:57 +0800448extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
Fred Isaman1763da12012-04-20 14:47:57 -0400449
Andy Adamsoncccef3b2009-04-01 09:22:03 -0400450/* nfs4proc.c */
Benny Halevyd20581a2011-05-22 19:52:03 +0300451extern void __nfs4_read_done_cb(struct nfs_read_data *);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400452extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
Andy Adamson45a52a02011-03-01 01:34:08 +0000453 const struct rpc_timeout *timeparms,
454 const char *ip_addr,
Chuck Lever4bf590e2012-05-21 22:46:07 -0400455 rpc_authflavor_t authflavour);
Chuck Lever05f4c352012-09-14 17:24:32 -0400456extern int nfs40_walk_client_list(struct nfs_client *clp,
457 struct nfs_client **result,
458 struct rpc_cred *cred);
459extern int nfs41_walk_client_list(struct nfs_client *clp,
460 struct nfs_client **result,
461 struct rpc_cred *cred);
Andy Adamsoncccef3b2009-04-01 09:22:03 -0400462
Andy Adamson557134a2009-04-01 09:21:53 -0400463/*
David Howellsf7b422b2006-06-09 09:34:33 -0400464 * Determine the device name as a string
465 */
Al Virob514f872011-03-16 06:26:11 -0400466static inline char *nfs_devname(struct dentry *dentry,
David Howells54ceac42006-08-22 20:06:13 -0400467 char *buffer, ssize_t buflen)
David Howellsf7b422b2006-06-09 09:34:33 -0400468{
Al Virob514f872011-03-16 06:26:11 -0400469 char *dummy;
Ben Hutchings97a54862012-10-21 19:23:52 +0100470 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
David Howellsf7b422b2006-06-09 09:34:33 -0400471}
472
473/*
474 * Determine the actual block size (and log2 thereof)
475 */
476static inline
477unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
478{
479 /* make sure blocksize is a power of two */
480 if ((bsize & (bsize - 1)) || nrbitsp) {
481 unsigned char nrbits;
482
483 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
484 ;
485 bsize = 1 << nrbits;
486 if (nrbitsp)
487 *nrbitsp = nrbits;
488 }
489
490 return bsize;
491}
492
493/*
494 * Calculate the number of 512byte blocks used.
495 */
Chuck Lever9eaa67c2007-07-01 12:12:19 -0400496static inline blkcnt_t nfs_calc_block_size(u64 tsize)
David Howellsf7b422b2006-06-09 09:34:33 -0400497{
Chuck Lever9eaa67c2007-07-01 12:12:19 -0400498 blkcnt_t used = (tsize + 511) >> 9;
David Howellsf7b422b2006-06-09 09:34:33 -0400499 return (used > ULONG_MAX) ? ULONG_MAX : used;
500}
501
502/*
503 * Compute and set NFS server blocksize
504 */
505static inline
506unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
507{
508 if (bsize < NFS_MIN_FILE_IO_SIZE)
509 bsize = NFS_DEF_FILE_IO_SIZE;
510 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
511 bsize = NFS_MAX_FILE_IO_SIZE;
512
513 return nfs_block_bits(bsize, nrbitsp);
514}
515
516/*
517 * Determine the maximum file size for a superblock
518 */
519static inline
520void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
521{
522 sb->s_maxbytes = (loff_t)maxfilesize;
523 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
524 sb->s_maxbytes = MAX_LFS_FILESIZE;
525}
Trond Myklebust49a70f22006-12-05 00:35:38 -0500526
527/*
528 * Determine the number of bytes of data the page contains
529 */
530static inline
531unsigned int nfs_page_length(struct page *page)
532{
Mel Gormand56b4dd2012-07-31 16:45:06 -0700533 loff_t i_size = i_size_read(page_file_mapping(page)->host);
Trond Myklebust49a70f22006-12-05 00:35:38 -0500534
535 if (i_size > 0) {
Mel Gormand56b4dd2012-07-31 16:45:06 -0700536 pgoff_t page_index = page_file_index(page);
Trond Myklebust49a70f22006-12-05 00:35:38 -0500537 pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
Mel Gormand56b4dd2012-07-31 16:45:06 -0700538 if (page_index < end_index)
Trond Myklebust49a70f22006-12-05 00:35:38 -0500539 return PAGE_CACHE_SIZE;
Mel Gormand56b4dd2012-07-31 16:45:06 -0700540 if (page_index == end_index)
Trond Myklebust49a70f22006-12-05 00:35:38 -0500541 return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1;
542 }
543 return 0;
544}
Trond Myklebust8d5658c2007-04-10 09:26:35 -0400545
546/*
Trond Myklebust0b26a0b2010-11-20 14:26:44 -0500547 * Convert a umode to a dirent->d_type
548 */
549static inline
550unsigned char nfs_umode_to_dtype(umode_t mode)
551{
552 return (mode >> 12) & 15;
553}
554
555/*
Trond Myklebust8d5658c2007-04-10 09:26:35 -0400556 * Determine the number of pages in an array of length 'len' and
557 * with a base offset of 'base'
558 */
559static inline
560unsigned int nfs_page_array_len(unsigned int base, size_t len)
561{
562 return ((unsigned long)len + (unsigned long)base +
563 PAGE_SIZE - 1) >> PAGE_SHIFT;
564}
Trond Myklebust0110ee12009-12-07 09:00:24 -0500565
Trond Myklebust3a1556e2012-04-27 13:48:18 -0400566/*
567 * Convert a struct timespec into a 64-bit change attribute
568 *
569 * This does approximately the same thing as timespec_to_ns(),
570 * but for calculation efficiency, we multiply the seconds by
571 * 1024*1024*1024.
572 */
573static inline
574u64 nfs_timespec_to_change_attr(const struct timespec *ts)
575{
576 return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
577}