blob: b46cf5a6732952460c68f6faeeb5479f355868d7 [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>
Trond Myklebust1264a2f2013-08-12 16:06:31 -04008#include <linux/crc32.h>
David Howellsf7b422b2006-06-09 09:34:33 -04009
David Howells08734042009-04-03 16:42:42 +010010#define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS)
11
David Howells54ceac42006-08-22 20:06:13 -040012struct nfs_string;
David Howells54ceac42006-08-22 20:06:13 -040013
14/* Maximum number of readahead requests
15 * FIXME: this should really be a sysctl so that users may tune it to suit
16 * their needs. People that do NFS over a slow network, might for
17 * instance want to reduce it to something closer to 1 for improved
18 * interactive response.
19 */
20#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
21
Bryan Schumaker7ebb9312011-03-24 17:12:30 +000022static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr)
23{
24 if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid))
25 fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT;
26}
27
Andy Adamson533eb462011-06-13 18:25:56 -040028static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr)
29{
30 if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) ||
31 (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) &&
32 ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0)))
33 return 0;
34
35 fattr->fileid = fattr->mounted_on_fileid;
36 return 1;
37}
38
David Howellsf7b422b2006-06-09 09:34:33 -040039struct nfs_clone_mount {
40 const struct super_block *sb;
41 const struct dentry *dentry;
42 struct nfs_fh *fh;
43 struct nfs_fattr *fattr;
44 char *hostname;
45 char *mnt_path;
Chuck Lever6677d092007-12-10 14:59:06 -050046 struct sockaddr *addr;
47 size_t addrlen;
David Howellsf7b422b2006-06-09 09:34:33 -040048 rpc_authflavor_t authflavor;
49};
50
\"Talpey, Thomas\6b18eaa2007-09-10 13:43:29 -040051/*
Chuck Levera14017d2009-06-17 18:02:12 -070052 * Note: RFC 1813 doesn't limit the number of auth flavors that
53 * a server can return, so make something up.
54 */
55#define NFS_MAX_SECFLAVORS (12)
56
57/*
Chuck Lever4cfd74f2009-09-08 19:49:47 -040058 * Value used if the user did not specify a port value.
59 */
60#define NFS_UNSPEC_PORT (-1)
61
62/*
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -040063 * Maximum number of pages that readdir can use for creating
64 * a vmapped array of pages.
65 */
66#define NFS_MAX_READDIR_PAGES 8
67
Bryan Schumakerfcf10392012-07-16 16:39:18 -040068struct nfs_client_initdata {
69 unsigned long init_flags;
70 const char *hostname;
71 const struct sockaddr *addr;
72 size_t addrlen;
Bryan Schumakerab7017a2012-07-30 16:05:16 -040073 struct nfs_subversion *nfs_mod;
Bryan Schumakerfcf10392012-07-16 16:39:18 -040074 int proto;
75 u32 minorversion;
76 struct net *net;
77};
78
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -040079/*
\"Talpey, Thomas\6b18eaa2007-09-10 13:43:29 -040080 * In-kernel mount arguments
81 */
82struct nfs_parsed_mount_data {
83 int flags;
Chuck Lever8cb7f742012-09-14 17:23:14 -040084 unsigned int rsize, wsize;
85 unsigned int timeo, retrans;
86 unsigned int acregmin, acregmax,
\"Talpey, Thomas\6b18eaa2007-09-10 13:43:29 -040087 acdirmin, acdirmax;
Chuck Lever8cb7f742012-09-14 17:23:14 -040088 unsigned int namlen;
David Howellsb797cac2009-04-03 16:42:48 +010089 unsigned int options;
\"Talpey, Thomas\6b18eaa2007-09-10 13:43:29 -040090 unsigned int bsize;
Weston Andros Adamsona3f73c22013-10-18 15:15:16 -040091 struct nfs_auth_info auth_info;
92 rpc_authflavor_t selected_flavor;
\"Talpey, Thomas\6b18eaa2007-09-10 13:43:29 -040093 char *client_address;
Chuck Lever764302c2009-09-08 19:50:03 -040094 unsigned int version;
Mike Sager3fd5be92009-04-01 09:21:48 -040095 unsigned int minorversion;
David Howells08734042009-04-03 16:42:42 +010096 char *fscache_uniq;
Bryan Schumakerb72e4f42012-05-10 15:07:40 -040097 bool need_mount;
\"Talpey, Thomas\6b18eaa2007-09-10 13:43:29 -040098
99 struct {
Chuck Lever4c568012007-12-10 14:59:28 -0500100 struct sockaddr_storage address;
101 size_t addrlen;
\"Talpey, Thomas\6b18eaa2007-09-10 13:43:29 -0400102 char *hostname;
Chuck Lever78fa7012008-03-14 14:10:15 -0400103 u32 version;
Chuck Lever4cfd74f2009-09-08 19:49:47 -0400104 int port;
Chuck Lever78fa7012008-03-14 14:10:15 -0400105 unsigned short protocol;
\"Talpey, Thomas\6b18eaa2007-09-10 13:43:29 -0400106 } mount_server;
107
108 struct {
Chuck Lever4c568012007-12-10 14:59:28 -0500109 struct sockaddr_storage address;
110 size_t addrlen;
\"Talpey, Thomas\6b18eaa2007-09-10 13:43:29 -0400111 char *hostname;
112 char *export_path;
Chuck Lever4cfd74f2009-09-08 19:49:47 -0400113 int port;
Chuck Lever78fa7012008-03-14 14:10:15 -0400114 unsigned short protocol;
\"Talpey, Thomas\6b18eaa2007-09-10 13:43:29 -0400115 } nfs_server;
Eric Parisf9c3a382008-03-05 14:20:18 -0500116
117 struct security_mnt_opts lsm_opts;
Stanislav Kinsburskye50a7a12012-01-10 16:12:46 +0400118 struct net *net;
\"Talpey, Thomas\6b18eaa2007-09-10 13:43:29 -0400119};
120
Chuck Lever146ec942008-12-23 15:21:34 -0500121/* mount_clnt.c */
Chuck Leverc5d120f2008-12-23 15:21:35 -0500122struct nfs_mount_request {
123 struct sockaddr *sap;
124 size_t salen;
125 char *hostname;
126 char *dirpath;
127 u32 version;
128 unsigned short protocol;
129 struct nfs_fh *fh;
Chuck Lever50a737f2008-12-23 15:21:37 -0500130 int noresvport;
Chuck Lever8e02f6b2009-06-17 18:02:13 -0700131 unsigned int *auth_flav_len;
132 rpc_authflavor_t *auth_flavs;
Stanislav Kinsbursky6d59b8d2012-01-10 16:12:54 +0400133 struct net *net;
Chuck Leverc5d120f2008-12-23 15:21:35 -0500134};
135
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400136struct nfs_mount_info {
137 void (*fill_super)(struct super_block *, struct nfs_mount_info *);
138 int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *);
139 struct nfs_parsed_mount_data *parsed;
140 struct nfs_clone_mount *cloned;
141 struct nfs_fh *mntfh;
142};
143
Chuck Leverc5d120f2008-12-23 15:21:35 -0500144extern int nfs_mount(struct nfs_mount_request *info);
Chuck Lever0b524122009-08-09 15:09:30 -0400145extern void nfs_umount(const struct nfs_mount_request *info);
Chuck Lever146ec942008-12-23 15:21:34 -0500146
David Howells24c8dbb2006-08-22 20:06:10 -0400147/* client.c */
Trond Myklebusta613fa12012-01-20 13:53:56 -0500148extern const struct rpc_program nfs_program;
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +0000149extern void nfs_clients_init(struct net *net);
Bryan Schumaker6663ee72012-06-20 15:53:46 -0400150extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *);
Bryan Schumaker428360d2012-07-16 16:39:17 -0400151int nfs_create_rpc_client(struct nfs_client *, const struct rpc_timeout *, rpc_authflavor_t);
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400152struct nfs_client *nfs_get_client(const struct nfs_client_initdata *,
153 const struct rpc_timeout *, const char *,
154 rpc_authflavor_t);
155int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *);
156void nfs_server_insert_lists(struct nfs_server *);
Chuck Lever32e62b72013-10-17 14:12:28 -0400157void nfs_server_remove_lists(struct nfs_server *);
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400158void nfs_init_timeout_values(struct rpc_timeout *, int, unsigned int, unsigned int);
159int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t,
160 rpc_authflavor_t);
161struct nfs_server *nfs_alloc_server(void);
162void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *);
David Howells54ceac42006-08-22 20:06:13 -0400163
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000164extern void nfs_cleanup_cb_ident_idr(struct net *);
David Howells24c8dbb2006-08-22 20:06:10 -0400165extern void nfs_put_client(struct nfs_client *);
Bryan Schumakercdb7ece2012-06-20 15:53:45 -0400166extern void nfs_free_client(struct nfs_client *);
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000167extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
Andy Adamsonc36fca52011-01-06 02:04:32 +0000168extern struct nfs_client *
Stanislav Kinsburskyc7add9a2012-01-26 15:11:49 +0400169nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
Bryan Schumaker459de2e2013-06-05 11:15:01 -0400170 struct nfs4_sessionid *, u32);
Bryan Schumaker1179acc2012-07-30 16:05:19 -0400171extern struct nfs_server *nfs_create_server(struct nfs_mount_info *,
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400172 struct nfs_subversion *);
\"Talpey, Thomas\91ea40b2007-09-10 13:44:33 -0400173extern struct nfs_server *nfs4_create_server(
Bryan Schumaker1179acc2012-07-30 16:05:19 -0400174 struct nfs_mount_info *,
175 struct nfs_subversion *);
David Howells54ceac42006-08-22 20:06:13 -0400176extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *,
177 struct nfs_fh *);
Chuck Lever32e62b72013-10-17 14:12:28 -0400178extern int nfs4_update_server(struct nfs_server *server, const char *hostname,
Trond Myklebust292f5032014-02-16 21:42:56 -0500179 struct sockaddr *sap, size_t salen,
180 struct net *net);
David Howells54ceac42006-08-22 20:06:13 -0400181extern void nfs_free_server(struct nfs_server *server);
182extern struct nfs_server *nfs_clone_server(struct nfs_server *,
183 struct nfs_fh *,
Bryan Schumaker7e6eb682012-04-27 13:27:42 -0400184 struct nfs_fattr *,
185 rpc_authflavor_t);
Trond Myklebust4697bd52012-05-23 13:24:36 -0400186extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
Andy Adamson76db6d92009-04-01 09:22:38 -0400187extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
Andy Adamsond83217c2011-03-01 01:34:17 +0000188extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
189 const struct sockaddr *ds_addr,
Andy Adamson98fc6852012-04-27 17:53:45 -0400190 int ds_addrlen, int ds_proto,
191 unsigned int ds_timeo,
192 unsigned int ds_retrans);
Andy Adamson0e201622013-09-06 14:14:00 -0400193extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
194 struct inode *);
David Howells6aaca562006-08-22 20:06:13 -0400195#ifdef CONFIG_PROC_FS
196extern int __init nfs_fs_proc_init(void);
197extern void nfs_fs_proc_exit(void);
198#else
199static inline int nfs_fs_proc_init(void)
200{
201 return 0;
202}
203static inline void nfs_fs_proc_exit(void)
204{
205}
206#endif
David Howells24c8dbb2006-08-22 20:06:10 -0400207
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400208#ifdef CONFIG_NFS_V4_1
209int nfs_sockaddr_match_ipaddr(const struct sockaddr *, const struct sockaddr *);
210#endif
211
Bryan Schumaker1179acc2012-07-30 16:05:19 -0400212/* nfs3client.c */
Bryan Schumaker1c606fb2012-07-30 16:05:24 -0400213#if IS_ENABLED(CONFIG_NFS_V3)
Bryan Schumaker1179acc2012-07-30 16:05:19 -0400214struct nfs_server *nfs3_create_server(struct nfs_mount_info *, struct nfs_subversion *);
215struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *,
216 struct nfs_fattr *, rpc_authflavor_t);
217#endif
218
David Howellsf7b422b2006-06-09 09:34:33 -0400219/* callback_xdr.c */
220extern struct svc_version nfs4_callback_version1;
Alexandros Batsakis07bccc22009-12-05 13:19:01 -0500221extern struct svc_version nfs4_callback_version4;
David Howellsf7b422b2006-06-09 09:34:33 -0400222
Fred Isaman4db6e0b2012-04-20 14:47:46 -0400223struct nfs_pageio_descriptor;
David Howellsf7b422b2006-06-09 09:34:33 -0400224/* pagelist.c */
225extern int __init nfs_init_nfspagecache(void);
David Brownell266bee82006-06-27 12:59:15 -0700226extern void nfs_destroy_nfspagecache(void);
David Howellsf7b422b2006-06-09 09:34:33 -0400227extern int __init nfs_init_readpagecache(void);
David Brownell266bee82006-06-27 12:59:15 -0700228extern void nfs_destroy_readpagecache(void);
David Howellsf7b422b2006-06-09 09:34:33 -0400229extern int __init nfs_init_writepagecache(void);
David Brownell266bee82006-06-27 12:59:15 -0700230extern void nfs_destroy_writepagecache(void);
David Howellsf7b422b2006-06-09 09:34:33 -0400231
David Howellsf7b422b2006-06-09 09:34:33 -0400232extern int __init nfs_init_directcache(void);
David Brownell266bee82006-06-27 12:59:15 -0700233extern void nfs_destroy_directcache(void);
Fred Isaman30dd3742012-04-20 14:47:45 -0400234extern bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount);
Fred Isaman4db6e0b2012-04-20 14:47:46 -0400235extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
236 struct nfs_pgio_header *hdr,
237 void (*release)(struct nfs_pgio_header *hdr));
238void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
Trond Myklebust577b4232013-04-08 21:38:12 -0400239int nfs_iocounter_wait(struct nfs_io_counter *c);
240
241static inline void nfs_iocounter_init(struct nfs_io_counter *c)
242{
243 c->flags = 0;
244 atomic_set(&c->io_count, 0);
245}
David Howellsf7b422b2006-06-09 09:34:33 -0400246
247/* nfs2xdr.c */
248extern struct rpc_procinfo nfs_procedures[];
Chuck Lever573c4e12010-12-14 14:58:11 +0000249extern int nfs2_decode_dirent(struct xdr_stream *,
250 struct nfs_entry *, int);
David Howellsf7b422b2006-06-09 09:34:33 -0400251
252/* nfs3xdr.c */
253extern struct rpc_procinfo nfs3_procedures[];
Chuck Lever573c4e12010-12-14 14:58:11 +0000254extern int nfs3_decode_dirent(struct xdr_stream *,
255 struct nfs_entry *, int);
David Howellsf7b422b2006-06-09 09:34:33 -0400256
257/* nfs4xdr.c */
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400258#if IS_ENABLED(CONFIG_NFS_V4)
Chuck Lever573c4e12010-12-14 14:58:11 +0000259extern int nfs4_decode_dirent(struct xdr_stream *,
260 struct nfs_entry *, int);
David Howells7d4e2742006-08-22 20:06:07 -0400261#endif
Alexandros Batsakis2449ea22009-12-05 13:36:55 -0500262#ifdef CONFIG_NFS_V4_1
263extern const u32 nfs41_maxread_overhead;
264extern const u32 nfs41_maxwrite_overhead;
Andy Adamsonf1c097b2013-06-25 19:02:53 -0400265extern const u32 nfs41_maxgetdevinfo_overhead;
Alexandros Batsakis2449ea22009-12-05 13:36:55 -0500266#endif
David Howellsf7b422b2006-06-09 09:34:33 -0400267
268/* nfs4proc.c */
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400269#if IS_ENABLED(CONFIG_NFS_V4)
David Howellsf7b422b2006-06-09 09:34:33 -0400270extern struct rpc_procinfo nfs4_procedures[];
Andrew Mortond75d5412006-06-25 02:41:26 -0700271#endif
David Howellsf7b422b2006-06-09 09:34:33 -0400272
Anna Schumaker694e0962013-11-13 12:29:08 -0500273#ifdef CONFIG_NFS_V4_SECURITY_LABEL
274extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags);
275static inline void nfs4_label_free(struct nfs4_label *label)
276{
277 if (label) {
278 kfree(label->label);
279 kfree(label);
280 }
281 return;
282}
Trond Myklebustfd1defc2014-02-06 14:38:53 -0500283
284static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
285{
286 if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL))
287 nfsi->cache_validity |= NFS_INO_INVALID_LABEL;
288}
Anna Schumaker694e0962013-11-13 12:29:08 -0500289#else
290static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; }
291static inline void nfs4_label_free(void *label) {}
Trond Myklebustfd1defc2014-02-06 14:38:53 -0500292static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
293{
294}
Anna Schumaker694e0962013-11-13 12:29:08 -0500295#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
296
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400297/* proc.c */
298void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400299extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
Andy Adamson45a52a02011-03-01 01:34:08 +0000300 const struct rpc_timeout *timeparms,
Andy Adamsonf8407292013-07-24 11:59:49 -0400301 const char *ip_addr);
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400302
Trond Myklebust979df722006-07-25 11:28:19 -0400303/* dir.c */
Dave Chinner1ab6c492013-08-28 10:18:09 +1000304extern unsigned long nfs_access_cache_count(struct shrinker *shrink,
305 struct shrink_control *sc);
306extern unsigned long nfs_access_cache_scan(struct shrinker *shrink,
307 struct shrink_control *sc);
Bryan Schumaker597d9282012-07-16 16:39:10 -0400308struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
309int nfs_create(struct inode *, struct dentry *, umode_t, bool);
310int nfs_mkdir(struct inode *, struct dentry *, umode_t);
311int nfs_rmdir(struct inode *, struct dentry *);
312int nfs_unlink(struct inode *, struct dentry *);
313int nfs_symlink(struct inode *, struct dentry *, const char *);
314int nfs_link(struct dentry *, struct inode *, struct dentry *);
315int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
316int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
Trond Myklebust979df722006-07-25 11:28:19 -0400317
Bryan Schumakerce4ef7c2012-07-16 16:39:15 -0400318/* file.c */
319int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int);
320loff_t nfs_file_llseek(struct file *, loff_t, int);
321int nfs_file_flush(struct file *, fl_owner_t);
322ssize_t nfs_file_read(struct kiocb *, const struct iovec *, unsigned long, loff_t);
323ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *,
324 size_t, unsigned int);
325int nfs_file_mmap(struct file *, struct vm_area_struct *);
326ssize_t nfs_file_write(struct kiocb *, const struct iovec *, unsigned long, loff_t);
327int nfs_file_release(struct inode *, struct file *);
328int nfs_lock(struct file *, int, struct file_lock *);
329int nfs_flock(struct file *, int, struct file_lock *);
330ssize_t nfs_file_splice_write(struct pipe_inode_info *, struct file *, loff_t *,
331 size_t, unsigned int);
332int nfs_check_flags(int);
333int nfs_setlease(struct file *, long, struct file_lock **);
334
David Howellsf7b422b2006-06-09 09:34:33 -0400335/* inode.c */
Trond Myklebust57460062008-02-19 20:04:22 -0500336extern struct workqueue_struct *nfsiod_workqueue;
David Howellsf7b422b2006-06-09 09:34:33 -0400337extern struct inode *nfs_alloc_inode(struct super_block *sb);
338extern void nfs_destroy_inode(struct inode *);
Christoph Hellwiga9185b42010-03-05 09:21:37 +0100339extern int nfs_write_inode(struct inode *, struct writeback_control *);
Trond Myklebusteed99352012-12-14 14:36:36 -0500340extern int nfs_drop_inode(struct inode *);
Bryan Schumaker19d87ca2012-07-30 16:05:21 -0400341extern void nfs_clear_inode(struct inode *);
Al Virob57922d2010-06-07 14:34:48 -0400342extern void nfs_evict_inode(struct inode *);
Trond Myklebustf41f7412008-06-11 17:39:04 -0400343void nfs_zap_acl_cache(struct inode *inode);
Trond Myklebust72cb77f2009-03-11 14:10:30 -0400344extern int nfs_wait_bit_killable(void *word);
David Howellsf7b422b2006-06-09 09:34:33 -0400345
346/* super.c */
Bryan Schumaker6a744902012-07-30 16:05:20 -0400347extern const struct super_operations nfs_sops;
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400348extern struct file_system_type nfs_fs_type;
David Howells54ceac42006-08-22 20:06:13 -0400349extern struct file_system_type nfs_xdev_fs_type;
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400350#if IS_ENABLED(CONFIG_NFS_V4)
David Howells54ceac42006-08-22 20:06:13 -0400351extern struct file_system_type nfs4_xdev_fs_type;
352extern struct file_system_type nfs4_referral_fs_type;
David Howellsf7b422b2006-06-09 09:34:33 -0400353#endif
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -0400354bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t);
Bryan Schumakerff9099f22012-07-30 16:05:18 -0400355struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *,
356 struct nfs_subversion *);
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400357void nfs_initialise_sb(struct super_block *);
358int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
359int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400360struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *,
361 struct nfs_mount_info *, struct nfs_subversion *);
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400362struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *);
363struct dentry * nfs_xdev_mount_common(struct file_system_type *, int,
364 const char *, struct nfs_mount_info *);
365void nfs_kill_super(struct super_block *);
366void nfs_fill_super(struct super_block *, struct nfs_mount_info *);
Dominik Hackl4ebd9ab2006-07-02 17:29:26 +0200367
David Howellsf7b422b2006-06-09 09:34:33 -0400368extern struct rpc_stat nfs_rpcstat;
Dominik Hackl4ebd9ab2006-07-02 17:29:26 +0200369
David Howellsf7b422b2006-06-09 09:34:33 -0400370extern int __init register_nfs_fs(void);
371extern void __exit unregister_nfs_fs(void);
Trond Myklebust1daef0a2008-07-27 18:19:01 -0400372extern void nfs_sb_active(struct super_block *sb);
373extern void nfs_sb_deactive(struct super_block *sb);
David Howellsf7b422b2006-06-09 09:34:33 -0400374
375/* namespace.c */
Ben Hutchings97a54862012-10-21 19:23:52 +0100376#define NFS_PATH_CANONICAL 1
Al Virob514f872011-03-16 06:26:11 -0400377extern char *nfs_path(char **p, struct dentry *dentry,
Ben Hutchings97a54862012-10-21 19:23:52 +0100378 char *buffer, ssize_t buflen, unsigned flags);
David Howells36d43a42011-01-14 18:45:42 +0000379extern struct vfsmount *nfs_d_automount(struct path *path);
Bryan Schumaker281cad42012-04-27 13:27:45 -0400380struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *,
381 struct nfs_fh *, struct nfs_fattr *);
382struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *,
383 struct nfs_fattr *, rpc_authflavor_t);
David Howellsf7b422b2006-06-09 09:34:33 -0400384
David Howells54ceac42006-08-22 20:06:13 -0400385/* getroot.c */
Al Viro0d5839a2011-03-16 05:27:27 -0400386extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *,
387 const char *);
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400388#if IS_ENABLED(CONFIG_NFS_V4)
Al Viro0d5839a2011-03-16 05:27:27 -0400389extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *,
390 const char *);
David Howells54ceac42006-08-22 20:06:13 -0400391
Trond Myklebust5e6b1992013-09-07 12:58:57 -0400392extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool);
David Howells7d4e2742006-08-22 20:06:07 -0400393#endif
David Howellsf7b422b2006-06-09 09:34:33 -0400394
Fred Isaman061ae2e2012-04-20 14:47:48 -0400395struct nfs_pgio_completion_ops;
Andy Adamsonf11c88a2009-04-01 09:22:25 -0400396/* read.c */
Fred Isaman4db6e0b2012-04-20 14:47:46 -0400397extern struct nfs_read_header *nfs_readhdr_alloc(void);
Fred Isamancd841602012-04-20 14:47:44 -0400398extern void nfs_readhdr_free(struct nfs_pgio_header *hdr);
Fred Isaman584aa812012-04-20 14:47:51 -0400399extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
400 struct inode *inode,
401 const struct nfs_pgio_completion_ops *compl_ops);
Fred Isamanc5996c42012-04-20 14:47:41 -0400402extern int nfs_initiate_read(struct rpc_clnt *clnt,
403 struct nfs_read_data *data,
Andy Adamson9f0ec1762012-04-27 17:53:44 -0400404 const struct rpc_call_ops *call_ops, int flags);
Andy Adamsonf11c88a2009-04-01 09:22:25 -0400405extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
Trond Myklebust493292d2011-07-13 15:58:28 -0400406extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc,
Fred Isaman4db6e0b2012-04-20 14:47:46 -0400407 struct nfs_pgio_header *hdr);
Trond Myklebust493292d2011-07-13 15:58:28 -0400408extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
409extern void nfs_readdata_release(struct nfs_read_data *rdata);
Trond Myklebuste885de12011-06-10 13:30:23 -0400410
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400411/* super.c */
412void nfs_clone_super(struct super_block *, struct nfs_mount_info *);
413void nfs_umount_begin(struct super_block *);
414int nfs_statfs(struct dentry *, struct kstatfs *);
415int nfs_show_options(struct seq_file *, struct dentry *);
416int nfs_show_devname(struct seq_file *, struct dentry *);
417int nfs_show_path(struct seq_file *, struct dentry *);
418int nfs_show_stats(struct seq_file *, struct dentry *);
419void nfs_put_super(struct super_block *);
420int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
421
Andy Adamsondef6ed72009-04-01 09:22:26 -0400422/* write.c */
Fred Isaman1763da12012-04-20 14:47:57 -0400423extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
424 struct inode *inode, int ioflags,
425 const struct nfs_pgio_completion_ops *compl_ops);
Fred Isaman6c75dc02012-04-20 14:47:47 -0400426extern struct nfs_write_header *nfs_writehdr_alloc(void);
Fred Isamancd841602012-04-20 14:47:44 -0400427extern void nfs_writehdr_free(struct nfs_pgio_header *hdr);
Trond Myklebustdce81292011-07-13 15:59:19 -0400428extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc,
Fred Isaman6c75dc02012-04-20 14:47:47 -0400429 struct nfs_pgio_header *hdr);
Trond Myklebustdce81292011-07-13 15:59:19 -0400430extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
431extern void nfs_writedata_release(struct nfs_write_data *wdata);
Fred Isaman0b7c0152012-04-20 14:47:39 -0400432extern void nfs_commit_free(struct nfs_commit_data *p);
Fred Isamanc5996c42012-04-20 14:47:41 -0400433extern int nfs_initiate_write(struct rpc_clnt *clnt,
434 struct nfs_write_data *data,
Fred Isamana69aef12011-03-03 15:13:47 +0000435 const struct rpc_call_ops *call_ops,
Andy Adamson9f0ec1762012-04-27 17:53:44 -0400436 int how, int flags);
Andy Adamsondef6ed72009-04-01 09:22:26 -0400437extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
Fred Isaman0b7c0152012-04-20 14:47:39 -0400438extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
439extern int nfs_initiate_commit(struct rpc_clnt *clnt,
440 struct nfs_commit_data *data,
Fred Isamane0c2b382011-03-23 13:27:53 +0000441 const struct rpc_call_ops *call_ops,
Andy Adamson9f0ec1762012-04-27 17:53:44 -0400442 int how, int flags);
Fred Isaman0b7c0152012-04-20 14:47:39 -0400443extern void nfs_init_commit(struct nfs_commit_data *data,
Fred Isamane0c2b382011-03-23 13:27:53 +0000444 struct list_head *head,
Fred Isamanf453a542012-04-20 14:47:54 -0400445 struct pnfs_layout_segment *lseg,
446 struct nfs_commit_info *cinfo);
Fred Isaman1763da12012-04-20 14:47:57 -0400447int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
448 struct nfs_commit_info *cinfo, int max);
449int nfs_scan_commit(struct inode *inode, struct list_head *dst,
450 struct nfs_commit_info *cinfo);
451void nfs_mark_request_commit(struct nfs_page *req,
452 struct pnfs_layout_segment *lseg,
453 struct nfs_commit_info *cinfo);
454int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
455 int how, struct nfs_commit_info *cinfo);
Fred Isamane0c2b382011-03-23 13:27:53 +0000456void nfs_retry_commit(struct list_head *page_list,
Fred Isamanea2cf222012-04-20 14:47:53 -0400457 struct pnfs_layout_segment *lseg,
458 struct nfs_commit_info *cinfo);
Fred Isaman0b7c0152012-04-20 14:47:39 -0400459void nfs_commitdata_release(struct nfs_commit_data *data);
Fred Isamanea2cf222012-04-20 14:47:53 -0400460void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst,
461 struct nfs_commit_info *cinfo);
462void nfs_request_remove_commit_list(struct nfs_page *req,
463 struct nfs_commit_info *cinfo);
464void nfs_init_cinfo(struct nfs_commit_info *cinfo,
465 struct inode *inode,
466 struct nfs_direct_req *dreq);
Andy Adamsondc248262013-08-14 11:59:16 -0400467int nfs_key_timeout_notify(struct file *filp, struct inode *inode);
468bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx);
Fred Isamane0c2b382011-03-23 13:27:53 +0000469
Trond Myklebust074cc1d2009-08-10 08:54:13 -0400470#ifdef CONFIG_MIGRATION
471extern int nfs_migrate_page(struct address_space *,
Mel Gormana6bc32b2012-01-12 17:19:43 -0800472 struct page *, struct page *, enum migrate_mode);
Trond Myklebust074cc1d2009-08-10 08:54:13 -0400473#else
474#define nfs_migrate_page NULL
475#endif
Andy Adamsondef6ed72009-04-01 09:22:26 -0400476
Fred Isaman1763da12012-04-20 14:47:57 -0400477/* direct.c */
478void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
479 struct nfs_direct_req *dreq);
Trond Myklebust1d59d612012-05-31 12:22:33 -0400480static inline void nfs_inode_dio_wait(struct inode *inode)
481{
482 inode_dio_wait(inode);
483}
Peng Tao62965562012-09-25 14:55:57 +0800484extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
Fred Isaman1763da12012-04-20 14:47:57 -0400485
Andy Adamsoncccef3b2009-04-01 09:22:03 -0400486/* nfs4proc.c */
Benny Halevyd20581a2011-05-22 19:52:03 +0300487extern void __nfs4_read_done_cb(struct nfs_read_data *);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400488extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
Andy Adamson45a52a02011-03-01 01:34:08 +0000489 const struct rpc_timeout *timeparms,
Andy Adamsonf8407292013-07-24 11:59:49 -0400490 const char *ip_addr);
Chuck Lever05f4c352012-09-14 17:24:32 -0400491extern int nfs40_walk_client_list(struct nfs_client *clp,
492 struct nfs_client **result,
493 struct rpc_cred *cred);
494extern int nfs41_walk_client_list(struct nfs_client *clp,
495 struct nfs_client **result,
496 struct rpc_cred *cred);
Andy Adamsoncccef3b2009-04-01 09:22:03 -0400497
Andy Adamson557134a2009-04-01 09:21:53 -0400498/*
David Howellsf7b422b2006-06-09 09:34:33 -0400499 * Determine the device name as a string
500 */
Al Virob514f872011-03-16 06:26:11 -0400501static inline char *nfs_devname(struct dentry *dentry,
David Howells54ceac42006-08-22 20:06:13 -0400502 char *buffer, ssize_t buflen)
David Howellsf7b422b2006-06-09 09:34:33 -0400503{
Al Virob514f872011-03-16 06:26:11 -0400504 char *dummy;
Ben Hutchings97a54862012-10-21 19:23:52 +0100505 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
David Howellsf7b422b2006-06-09 09:34:33 -0400506}
507
508/*
509 * Determine the actual block size (and log2 thereof)
510 */
511static inline
512unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
513{
514 /* make sure blocksize is a power of two */
515 if ((bsize & (bsize - 1)) || nrbitsp) {
516 unsigned char nrbits;
517
518 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
519 ;
520 bsize = 1 << nrbits;
521 if (nrbitsp)
522 *nrbitsp = nrbits;
523 }
524
525 return bsize;
526}
527
528/*
529 * Calculate the number of 512byte blocks used.
530 */
Chuck Lever9eaa67c2007-07-01 12:12:19 -0400531static inline blkcnt_t nfs_calc_block_size(u64 tsize)
David Howellsf7b422b2006-06-09 09:34:33 -0400532{
Chuck Lever9eaa67c2007-07-01 12:12:19 -0400533 blkcnt_t used = (tsize + 511) >> 9;
David Howellsf7b422b2006-06-09 09:34:33 -0400534 return (used > ULONG_MAX) ? ULONG_MAX : used;
535}
536
537/*
538 * Compute and set NFS server blocksize
539 */
540static inline
541unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
542{
543 if (bsize < NFS_MIN_FILE_IO_SIZE)
544 bsize = NFS_DEF_FILE_IO_SIZE;
545 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
546 bsize = NFS_MAX_FILE_IO_SIZE;
547
548 return nfs_block_bits(bsize, nrbitsp);
549}
550
551/*
552 * Determine the maximum file size for a superblock
553 */
554static inline
555void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
556{
557 sb->s_maxbytes = (loff_t)maxfilesize;
558 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
559 sb->s_maxbytes = MAX_LFS_FILESIZE;
560}
Trond Myklebust49a70f22006-12-05 00:35:38 -0500561
562/*
563 * Determine the number of bytes of data the page contains
564 */
565static inline
566unsigned int nfs_page_length(struct page *page)
567{
Mel Gormand56b4dd2012-07-31 16:45:06 -0700568 loff_t i_size = i_size_read(page_file_mapping(page)->host);
Trond Myklebust49a70f22006-12-05 00:35:38 -0500569
570 if (i_size > 0) {
Mel Gormand56b4dd2012-07-31 16:45:06 -0700571 pgoff_t page_index = page_file_index(page);
Trond Myklebust49a70f22006-12-05 00:35:38 -0500572 pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
Mel Gormand56b4dd2012-07-31 16:45:06 -0700573 if (page_index < end_index)
Trond Myklebust49a70f22006-12-05 00:35:38 -0500574 return PAGE_CACHE_SIZE;
Mel Gormand56b4dd2012-07-31 16:45:06 -0700575 if (page_index == end_index)
Trond Myklebust49a70f22006-12-05 00:35:38 -0500576 return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1;
577 }
578 return 0;
579}
Trond Myklebust8d5658c2007-04-10 09:26:35 -0400580
581/*
Trond Myklebust0b26a0b2010-11-20 14:26:44 -0500582 * Convert a umode to a dirent->d_type
583 */
584static inline
585unsigned char nfs_umode_to_dtype(umode_t mode)
586{
587 return (mode >> 12) & 15;
588}
589
590/*
Trond Myklebust8d5658c2007-04-10 09:26:35 -0400591 * Determine the number of pages in an array of length 'len' and
592 * with a base offset of 'base'
593 */
594static inline
595unsigned int nfs_page_array_len(unsigned int base, size_t len)
596{
597 return ((unsigned long)len + (unsigned long)base +
598 PAGE_SIZE - 1) >> PAGE_SHIFT;
599}
Trond Myklebust0110ee12009-12-07 09:00:24 -0500600
Trond Myklebust3a1556e2012-04-27 13:48:18 -0400601/*
602 * Convert a struct timespec into a 64-bit change attribute
603 *
604 * This does approximately the same thing as timespec_to_ns(),
605 * but for calculation efficiency, we multiply the seconds by
606 * 1024*1024*1024.
607 */
608static inline
609u64 nfs_timespec_to_change_attr(const struct timespec *ts)
610{
611 return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
612}
Trond Myklebust1264a2f2013-08-12 16:06:31 -0400613
614#ifdef CONFIG_CRC32
615/**
616 * nfs_fhandle_hash - calculate the crc32 hash for the filehandle
617 * @fh - pointer to filehandle
618 *
619 * returns a crc32 hash for the filehandle that is compatible with
620 * the one displayed by "wireshark".
621 */
622static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
623{
624 return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size);
625}
626#else
627static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
628{
629 return 0;
630}
631#endif