blob: 38da8c2b81ac09d526b3b402d1964e0c7c17c2dc [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;
91 unsigned int auth_flavor_len;
92 rpc_authflavor_t auth_flavors[1];
93 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 *);
157void nfs_init_timeout_values(struct rpc_timeout *, int, unsigned int, unsigned int);
158int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t,
159 rpc_authflavor_t);
160struct nfs_server *nfs_alloc_server(void);
161void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *);
David Howells54ceac42006-08-22 20:06:13 -0400162
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000163extern void nfs_cleanup_cb_ident_idr(struct net *);
David Howells24c8dbb2006-08-22 20:06:10 -0400164extern void nfs_put_client(struct nfs_client *);
Bryan Schumakercdb7ece2012-06-20 15:53:45 -0400165extern void nfs_free_client(struct nfs_client *);
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000166extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
Andy Adamsonc36fca52011-01-06 02:04:32 +0000167extern struct nfs_client *
Stanislav Kinsburskyc7add9a2012-01-26 15:11:49 +0400168nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
Bryan Schumaker459de2e2013-06-05 11:15:01 -0400169 struct nfs4_sessionid *, u32);
Bryan Schumaker1179acc2012-07-30 16:05:19 -0400170extern struct nfs_server *nfs_create_server(struct nfs_mount_info *,
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400171 struct nfs_subversion *);
\"Talpey, Thomas\91ea40b2007-09-10 13:44:33 -0400172extern struct nfs_server *nfs4_create_server(
Bryan Schumaker1179acc2012-07-30 16:05:19 -0400173 struct nfs_mount_info *,
174 struct nfs_subversion *);
David Howells54ceac42006-08-22 20:06:13 -0400175extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *,
176 struct nfs_fh *);
177extern void nfs_free_server(struct nfs_server *server);
178extern struct nfs_server *nfs_clone_server(struct nfs_server *,
179 struct nfs_fh *,
Bryan Schumaker7e6eb682012-04-27 13:27:42 -0400180 struct nfs_fattr *,
181 rpc_authflavor_t);
Trond Myklebust4697bd52012-05-23 13:24:36 -0400182extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
Andy Adamson76db6d92009-04-01 09:22:38 -0400183extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
Andy Adamsond83217c2011-03-01 01:34:17 +0000184extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
185 const struct sockaddr *ds_addr,
Andy Adamson98fc6852012-04-27 17:53:45 -0400186 int ds_addrlen, int ds_proto,
187 unsigned int ds_timeo,
188 unsigned int ds_retrans);
Andy Adamson0e201622013-09-06 14:14:00 -0400189extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
190 struct inode *);
David Howells6aaca562006-08-22 20:06:13 -0400191#ifdef CONFIG_PROC_FS
192extern int __init nfs_fs_proc_init(void);
193extern void nfs_fs_proc_exit(void);
194#else
195static inline int nfs_fs_proc_init(void)
196{
197 return 0;
198}
199static inline void nfs_fs_proc_exit(void)
200{
201}
202#endif
David Howells24c8dbb2006-08-22 20:06:10 -0400203
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400204#ifdef CONFIG_NFS_V4_1
205int nfs_sockaddr_match_ipaddr(const struct sockaddr *, const struct sockaddr *);
206#endif
207
Bryan Schumaker1179acc2012-07-30 16:05:19 -0400208/* nfs3client.c */
Bryan Schumaker1c606fb2012-07-30 16:05:24 -0400209#if IS_ENABLED(CONFIG_NFS_V3)
Bryan Schumaker1179acc2012-07-30 16:05:19 -0400210struct nfs_server *nfs3_create_server(struct nfs_mount_info *, struct nfs_subversion *);
211struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *,
212 struct nfs_fattr *, rpc_authflavor_t);
213#endif
214
David Howellsf7b422b2006-06-09 09:34:33 -0400215/* callback_xdr.c */
216extern struct svc_version nfs4_callback_version1;
Alexandros Batsakis07bccc22009-12-05 13:19:01 -0500217extern struct svc_version nfs4_callback_version4;
David Howellsf7b422b2006-06-09 09:34:33 -0400218
Fred Isaman4db6e0b2012-04-20 14:47:46 -0400219struct nfs_pageio_descriptor;
David Howellsf7b422b2006-06-09 09:34:33 -0400220/* pagelist.c */
221extern int __init nfs_init_nfspagecache(void);
David Brownell266bee82006-06-27 12:59:15 -0700222extern void nfs_destroy_nfspagecache(void);
David Howellsf7b422b2006-06-09 09:34:33 -0400223extern int __init nfs_init_readpagecache(void);
David Brownell266bee82006-06-27 12:59:15 -0700224extern void nfs_destroy_readpagecache(void);
David Howellsf7b422b2006-06-09 09:34:33 -0400225extern int __init nfs_init_writepagecache(void);
David Brownell266bee82006-06-27 12:59:15 -0700226extern void nfs_destroy_writepagecache(void);
David Howellsf7b422b2006-06-09 09:34:33 -0400227
David Howellsf7b422b2006-06-09 09:34:33 -0400228extern int __init nfs_init_directcache(void);
David Brownell266bee82006-06-27 12:59:15 -0700229extern void nfs_destroy_directcache(void);
Fred Isaman30dd3742012-04-20 14:47:45 -0400230extern bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount);
Fred Isaman4db6e0b2012-04-20 14:47:46 -0400231extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
232 struct nfs_pgio_header *hdr,
233 void (*release)(struct nfs_pgio_header *hdr));
234void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
Trond Myklebust577b4232013-04-08 21:38:12 -0400235int nfs_iocounter_wait(struct nfs_io_counter *c);
236
237static inline void nfs_iocounter_init(struct nfs_io_counter *c)
238{
239 c->flags = 0;
240 atomic_set(&c->io_count, 0);
241}
David Howellsf7b422b2006-06-09 09:34:33 -0400242
243/* nfs2xdr.c */
244extern struct rpc_procinfo nfs_procedures[];
Chuck Lever573c4e12010-12-14 14:58:11 +0000245extern int nfs2_decode_dirent(struct xdr_stream *,
246 struct nfs_entry *, int);
David Howellsf7b422b2006-06-09 09:34:33 -0400247
248/* nfs3xdr.c */
249extern struct rpc_procinfo nfs3_procedures[];
Chuck Lever573c4e12010-12-14 14:58:11 +0000250extern int nfs3_decode_dirent(struct xdr_stream *,
251 struct nfs_entry *, int);
David Howellsf7b422b2006-06-09 09:34:33 -0400252
253/* nfs4xdr.c */
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400254#if IS_ENABLED(CONFIG_NFS_V4)
Chuck Lever573c4e12010-12-14 14:58:11 +0000255extern int nfs4_decode_dirent(struct xdr_stream *,
256 struct nfs_entry *, int);
David Howells7d4e2742006-08-22 20:06:07 -0400257#endif
Alexandros Batsakis2449ea22009-12-05 13:36:55 -0500258#ifdef CONFIG_NFS_V4_1
259extern const u32 nfs41_maxread_overhead;
260extern const u32 nfs41_maxwrite_overhead;
Andy Adamsonf1c097b2013-06-25 19:02:53 -0400261extern const u32 nfs41_maxgetdevinfo_overhead;
Alexandros Batsakis2449ea22009-12-05 13:36:55 -0500262#endif
David Howellsf7b422b2006-06-09 09:34:33 -0400263
264/* nfs4proc.c */
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400265#if IS_ENABLED(CONFIG_NFS_V4)
David Howellsf7b422b2006-06-09 09:34:33 -0400266extern struct rpc_procinfo nfs4_procedures[];
Andrew Mortond75d5412006-06-25 02:41:26 -0700267#endif
David Howellsf7b422b2006-06-09 09:34:33 -0400268
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400269/* proc.c */
270void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400271extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
Andy Adamson45a52a02011-03-01 01:34:08 +0000272 const struct rpc_timeout *timeparms,
Andy Adamsonf8407292013-07-24 11:59:49 -0400273 const char *ip_addr);
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400274
Trond Myklebust979df722006-07-25 11:28:19 -0400275/* dir.c */
Dave Chinner1ab6c492013-08-28 10:18:09 +1000276extern unsigned long nfs_access_cache_count(struct shrinker *shrink,
277 struct shrink_control *sc);
278extern unsigned long nfs_access_cache_scan(struct shrinker *shrink,
279 struct shrink_control *sc);
Bryan Schumaker597d9282012-07-16 16:39:10 -0400280struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
281int nfs_create(struct inode *, struct dentry *, umode_t, bool);
282int nfs_mkdir(struct inode *, struct dentry *, umode_t);
283int nfs_rmdir(struct inode *, struct dentry *);
284int nfs_unlink(struct inode *, struct dentry *);
285int nfs_symlink(struct inode *, struct dentry *, const char *);
286int nfs_link(struct dentry *, struct inode *, struct dentry *);
287int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
288int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
Trond Myklebust979df722006-07-25 11:28:19 -0400289
Bryan Schumakerce4ef7c2012-07-16 16:39:15 -0400290/* file.c */
291int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int);
292loff_t nfs_file_llseek(struct file *, loff_t, int);
293int nfs_file_flush(struct file *, fl_owner_t);
294ssize_t nfs_file_read(struct kiocb *, const struct iovec *, unsigned long, loff_t);
295ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *,
296 size_t, unsigned int);
297int nfs_file_mmap(struct file *, struct vm_area_struct *);
298ssize_t nfs_file_write(struct kiocb *, const struct iovec *, unsigned long, loff_t);
299int nfs_file_release(struct inode *, struct file *);
300int nfs_lock(struct file *, int, struct file_lock *);
301int nfs_flock(struct file *, int, struct file_lock *);
302ssize_t nfs_file_splice_write(struct pipe_inode_info *, struct file *, loff_t *,
303 size_t, unsigned int);
304int nfs_check_flags(int);
305int nfs_setlease(struct file *, long, struct file_lock **);
306
David Howellsf7b422b2006-06-09 09:34:33 -0400307/* inode.c */
Trond Myklebust57460062008-02-19 20:04:22 -0500308extern struct workqueue_struct *nfsiod_workqueue;
David Howellsf7b422b2006-06-09 09:34:33 -0400309extern struct inode *nfs_alloc_inode(struct super_block *sb);
310extern void nfs_destroy_inode(struct inode *);
Christoph Hellwiga9185b42010-03-05 09:21:37 +0100311extern int nfs_write_inode(struct inode *, struct writeback_control *);
Trond Myklebusteed99352012-12-14 14:36:36 -0500312extern int nfs_drop_inode(struct inode *);
Bryan Schumaker19d87ca2012-07-30 16:05:21 -0400313extern void nfs_clear_inode(struct inode *);
Al Virob57922d2010-06-07 14:34:48 -0400314extern void nfs_evict_inode(struct inode *);
Trond Myklebustf41f7412008-06-11 17:39:04 -0400315void nfs_zap_acl_cache(struct inode *inode);
Trond Myklebust72cb77f2009-03-11 14:10:30 -0400316extern int nfs_wait_bit_killable(void *word);
David Howellsf7b422b2006-06-09 09:34:33 -0400317
318/* super.c */
Bryan Schumaker6a744902012-07-30 16:05:20 -0400319extern const struct super_operations nfs_sops;
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400320extern struct file_system_type nfs_fs_type;
David Howells54ceac42006-08-22 20:06:13 -0400321extern struct file_system_type nfs_xdev_fs_type;
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400322#if IS_ENABLED(CONFIG_NFS_V4)
David Howells54ceac42006-08-22 20:06:13 -0400323extern struct file_system_type nfs4_xdev_fs_type;
324extern struct file_system_type nfs4_referral_fs_type;
David Howellsf7b422b2006-06-09 09:34:33 -0400325#endif
Bryan Schumakerff9099f22012-07-30 16:05:18 -0400326struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *,
327 struct nfs_subversion *);
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400328void nfs_initialise_sb(struct super_block *);
329int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
330int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400331struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *,
332 struct nfs_mount_info *, struct nfs_subversion *);
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400333struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *);
334struct dentry * nfs_xdev_mount_common(struct file_system_type *, int,
335 const char *, struct nfs_mount_info *);
336void nfs_kill_super(struct super_block *);
337void nfs_fill_super(struct super_block *, struct nfs_mount_info *);
Dominik Hackl4ebd9ab2006-07-02 17:29:26 +0200338
David Howellsf7b422b2006-06-09 09:34:33 -0400339extern struct rpc_stat nfs_rpcstat;
Dominik Hackl4ebd9ab2006-07-02 17:29:26 +0200340
David Howellsf7b422b2006-06-09 09:34:33 -0400341extern int __init register_nfs_fs(void);
342extern void __exit unregister_nfs_fs(void);
Trond Myklebust1daef0a2008-07-27 18:19:01 -0400343extern void nfs_sb_active(struct super_block *sb);
344extern void nfs_sb_deactive(struct super_block *sb);
David Howellsf7b422b2006-06-09 09:34:33 -0400345
346/* namespace.c */
Ben Hutchings97a54862012-10-21 19:23:52 +0100347#define NFS_PATH_CANONICAL 1
Al Virob514f872011-03-16 06:26:11 -0400348extern char *nfs_path(char **p, struct dentry *dentry,
Ben Hutchings97a54862012-10-21 19:23:52 +0100349 char *buffer, ssize_t buflen, unsigned flags);
David Howells36d43a42011-01-14 18:45:42 +0000350extern struct vfsmount *nfs_d_automount(struct path *path);
Bryan Schumaker281cad42012-04-27 13:27:45 -0400351struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *,
352 struct nfs_fh *, struct nfs_fattr *);
353struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *,
354 struct nfs_fattr *, rpc_authflavor_t);
David Howellsf7b422b2006-06-09 09:34:33 -0400355
David Howells54ceac42006-08-22 20:06:13 -0400356/* getroot.c */
Al Viro0d5839a2011-03-16 05:27:27 -0400357extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *,
358 const char *);
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400359#if IS_ENABLED(CONFIG_NFS_V4)
Al Viro0d5839a2011-03-16 05:27:27 -0400360extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *,
361 const char *);
David Howells54ceac42006-08-22 20:06:13 -0400362
Trond Myklebust5e6b1992013-09-07 12:58:57 -0400363extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool);
David Howells7d4e2742006-08-22 20:06:07 -0400364#endif
David Howellsf7b422b2006-06-09 09:34:33 -0400365
Fred Isaman061ae2e2012-04-20 14:47:48 -0400366struct nfs_pgio_completion_ops;
Andy Adamsonf11c88a2009-04-01 09:22:25 -0400367/* read.c */
Fred Isaman4db6e0b2012-04-20 14:47:46 -0400368extern struct nfs_read_header *nfs_readhdr_alloc(void);
Fred Isamancd841602012-04-20 14:47:44 -0400369extern void nfs_readhdr_free(struct nfs_pgio_header *hdr);
Fred Isaman584aa812012-04-20 14:47:51 -0400370extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
371 struct inode *inode,
372 const struct nfs_pgio_completion_ops *compl_ops);
Fred Isamanc5996c42012-04-20 14:47:41 -0400373extern int nfs_initiate_read(struct rpc_clnt *clnt,
374 struct nfs_read_data *data,
Andy Adamson9f0ec1762012-04-27 17:53:44 -0400375 const struct rpc_call_ops *call_ops, int flags);
Andy Adamsonf11c88a2009-04-01 09:22:25 -0400376extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
Trond Myklebust493292d2011-07-13 15:58:28 -0400377extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc,
Fred Isaman4db6e0b2012-04-20 14:47:46 -0400378 struct nfs_pgio_header *hdr);
Trond Myklebust493292d2011-07-13 15:58:28 -0400379extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
380extern void nfs_readdata_release(struct nfs_read_data *rdata);
Trond Myklebuste885de12011-06-10 13:30:23 -0400381
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400382/* super.c */
383void nfs_clone_super(struct super_block *, struct nfs_mount_info *);
384void nfs_umount_begin(struct super_block *);
385int nfs_statfs(struct dentry *, struct kstatfs *);
386int nfs_show_options(struct seq_file *, struct dentry *);
387int nfs_show_devname(struct seq_file *, struct dentry *);
388int nfs_show_path(struct seq_file *, struct dentry *);
389int nfs_show_stats(struct seq_file *, struct dentry *);
390void nfs_put_super(struct super_block *);
391int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
392
Andy Adamsondef6ed72009-04-01 09:22:26 -0400393/* write.c */
Fred Isaman1763da12012-04-20 14:47:57 -0400394extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
395 struct inode *inode, int ioflags,
396 const struct nfs_pgio_completion_ops *compl_ops);
Fred Isaman6c75dc02012-04-20 14:47:47 -0400397extern struct nfs_write_header *nfs_writehdr_alloc(void);
Fred Isamancd841602012-04-20 14:47:44 -0400398extern void nfs_writehdr_free(struct nfs_pgio_header *hdr);
Trond Myklebustdce81292011-07-13 15:59:19 -0400399extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc,
Fred Isaman6c75dc02012-04-20 14:47:47 -0400400 struct nfs_pgio_header *hdr);
Trond Myklebustdce81292011-07-13 15:59:19 -0400401extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
402extern void nfs_writedata_release(struct nfs_write_data *wdata);
Fred Isaman0b7c0152012-04-20 14:47:39 -0400403extern void nfs_commit_free(struct nfs_commit_data *p);
Fred Isamanc5996c42012-04-20 14:47:41 -0400404extern int nfs_initiate_write(struct rpc_clnt *clnt,
405 struct nfs_write_data *data,
Fred Isamana69aef12011-03-03 15:13:47 +0000406 const struct rpc_call_ops *call_ops,
Andy Adamson9f0ec1762012-04-27 17:53:44 -0400407 int how, int flags);
Andy Adamsondef6ed72009-04-01 09:22:26 -0400408extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
Fred Isaman0b7c0152012-04-20 14:47:39 -0400409extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
410extern int nfs_initiate_commit(struct rpc_clnt *clnt,
411 struct nfs_commit_data *data,
Fred Isamane0c2b382011-03-23 13:27:53 +0000412 const struct rpc_call_ops *call_ops,
Andy Adamson9f0ec1762012-04-27 17:53:44 -0400413 int how, int flags);
Fred Isaman0b7c0152012-04-20 14:47:39 -0400414extern void nfs_init_commit(struct nfs_commit_data *data,
Fred Isamane0c2b382011-03-23 13:27:53 +0000415 struct list_head *head,
Fred Isamanf453a542012-04-20 14:47:54 -0400416 struct pnfs_layout_segment *lseg,
417 struct nfs_commit_info *cinfo);
Fred Isaman1763da12012-04-20 14:47:57 -0400418int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
419 struct nfs_commit_info *cinfo, int max);
420int nfs_scan_commit(struct inode *inode, struct list_head *dst,
421 struct nfs_commit_info *cinfo);
422void nfs_mark_request_commit(struct nfs_page *req,
423 struct pnfs_layout_segment *lseg,
424 struct nfs_commit_info *cinfo);
425int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
426 int how, struct nfs_commit_info *cinfo);
Fred Isamane0c2b382011-03-23 13:27:53 +0000427void nfs_retry_commit(struct list_head *page_list,
Fred Isamanea2cf222012-04-20 14:47:53 -0400428 struct pnfs_layout_segment *lseg,
429 struct nfs_commit_info *cinfo);
Fred Isaman0b7c0152012-04-20 14:47:39 -0400430void nfs_commitdata_release(struct nfs_commit_data *data);
Fred Isamanea2cf222012-04-20 14:47:53 -0400431void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst,
432 struct nfs_commit_info *cinfo);
433void nfs_request_remove_commit_list(struct nfs_page *req,
434 struct nfs_commit_info *cinfo);
435void nfs_init_cinfo(struct nfs_commit_info *cinfo,
436 struct inode *inode,
437 struct nfs_direct_req *dreq);
Andy Adamsondc248262013-08-14 11:59:16 -0400438int nfs_key_timeout_notify(struct file *filp, struct inode *inode);
439bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx);
Fred Isamane0c2b382011-03-23 13:27:53 +0000440
Trond Myklebust074cc1d2009-08-10 08:54:13 -0400441#ifdef CONFIG_MIGRATION
442extern int nfs_migrate_page(struct address_space *,
Mel Gormana6bc32b2012-01-12 17:19:43 -0800443 struct page *, struct page *, enum migrate_mode);
Trond Myklebust074cc1d2009-08-10 08:54:13 -0400444#else
445#define nfs_migrate_page NULL
446#endif
Andy Adamsondef6ed72009-04-01 09:22:26 -0400447
Fred Isaman1763da12012-04-20 14:47:57 -0400448/* direct.c */
449void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
450 struct nfs_direct_req *dreq);
Trond Myklebust1d59d612012-05-31 12:22:33 -0400451static inline void nfs_inode_dio_wait(struct inode *inode)
452{
453 inode_dio_wait(inode);
454}
Peng Tao62965562012-09-25 14:55:57 +0800455extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
Fred Isaman1763da12012-04-20 14:47:57 -0400456
Andy Adamsoncccef3b2009-04-01 09:22:03 -0400457/* nfs4proc.c */
Benny Halevyd20581a2011-05-22 19:52:03 +0300458extern void __nfs4_read_done_cb(struct nfs_read_data *);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400459extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
Andy Adamson45a52a02011-03-01 01:34:08 +0000460 const struct rpc_timeout *timeparms,
Andy Adamsonf8407292013-07-24 11:59:49 -0400461 const char *ip_addr);
Chuck Lever05f4c352012-09-14 17:24:32 -0400462extern int nfs40_walk_client_list(struct nfs_client *clp,
463 struct nfs_client **result,
464 struct rpc_cred *cred);
465extern int nfs41_walk_client_list(struct nfs_client *clp,
466 struct nfs_client **result,
467 struct rpc_cred *cred);
Andy Adamsoncccef3b2009-04-01 09:22:03 -0400468
Andy Adamson557134a2009-04-01 09:21:53 -0400469/*
David Howellsf7b422b2006-06-09 09:34:33 -0400470 * Determine the device name as a string
471 */
Al Virob514f872011-03-16 06:26:11 -0400472static inline char *nfs_devname(struct dentry *dentry,
David Howells54ceac42006-08-22 20:06:13 -0400473 char *buffer, ssize_t buflen)
David Howellsf7b422b2006-06-09 09:34:33 -0400474{
Al Virob514f872011-03-16 06:26:11 -0400475 char *dummy;
Ben Hutchings97a54862012-10-21 19:23:52 +0100476 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
David Howellsf7b422b2006-06-09 09:34:33 -0400477}
478
479/*
480 * Determine the actual block size (and log2 thereof)
481 */
482static inline
483unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
484{
485 /* make sure blocksize is a power of two */
486 if ((bsize & (bsize - 1)) || nrbitsp) {
487 unsigned char nrbits;
488
489 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
490 ;
491 bsize = 1 << nrbits;
492 if (nrbitsp)
493 *nrbitsp = nrbits;
494 }
495
496 return bsize;
497}
498
499/*
500 * Calculate the number of 512byte blocks used.
501 */
Chuck Lever9eaa67c2007-07-01 12:12:19 -0400502static inline blkcnt_t nfs_calc_block_size(u64 tsize)
David Howellsf7b422b2006-06-09 09:34:33 -0400503{
Chuck Lever9eaa67c2007-07-01 12:12:19 -0400504 blkcnt_t used = (tsize + 511) >> 9;
David Howellsf7b422b2006-06-09 09:34:33 -0400505 return (used > ULONG_MAX) ? ULONG_MAX : used;
506}
507
508/*
509 * Compute and set NFS server blocksize
510 */
511static inline
512unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
513{
514 if (bsize < NFS_MIN_FILE_IO_SIZE)
515 bsize = NFS_DEF_FILE_IO_SIZE;
516 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
517 bsize = NFS_MAX_FILE_IO_SIZE;
518
519 return nfs_block_bits(bsize, nrbitsp);
520}
521
522/*
523 * Determine the maximum file size for a superblock
524 */
525static inline
526void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
527{
528 sb->s_maxbytes = (loff_t)maxfilesize;
529 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
530 sb->s_maxbytes = MAX_LFS_FILESIZE;
531}
Trond Myklebust49a70f22006-12-05 00:35:38 -0500532
533/*
534 * Determine the number of bytes of data the page contains
535 */
536static inline
537unsigned int nfs_page_length(struct page *page)
538{
Mel Gormand56b4dd2012-07-31 16:45:06 -0700539 loff_t i_size = i_size_read(page_file_mapping(page)->host);
Trond Myklebust49a70f22006-12-05 00:35:38 -0500540
541 if (i_size > 0) {
Mel Gormand56b4dd2012-07-31 16:45:06 -0700542 pgoff_t page_index = page_file_index(page);
Trond Myklebust49a70f22006-12-05 00:35:38 -0500543 pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
Mel Gormand56b4dd2012-07-31 16:45:06 -0700544 if (page_index < end_index)
Trond Myklebust49a70f22006-12-05 00:35:38 -0500545 return PAGE_CACHE_SIZE;
Mel Gormand56b4dd2012-07-31 16:45:06 -0700546 if (page_index == end_index)
Trond Myklebust49a70f22006-12-05 00:35:38 -0500547 return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1;
548 }
549 return 0;
550}
Trond Myklebust8d5658c2007-04-10 09:26:35 -0400551
552/*
Trond Myklebust0b26a0b2010-11-20 14:26:44 -0500553 * Convert a umode to a dirent->d_type
554 */
555static inline
556unsigned char nfs_umode_to_dtype(umode_t mode)
557{
558 return (mode >> 12) & 15;
559}
560
561/*
Trond Myklebust8d5658c2007-04-10 09:26:35 -0400562 * Determine the number of pages in an array of length 'len' and
563 * with a base offset of 'base'
564 */
565static inline
566unsigned int nfs_page_array_len(unsigned int base, size_t len)
567{
568 return ((unsigned long)len + (unsigned long)base +
569 PAGE_SIZE - 1) >> PAGE_SHIFT;
570}
Trond Myklebust0110ee12009-12-07 09:00:24 -0500571
Trond Myklebust3a1556e2012-04-27 13:48:18 -0400572/*
573 * Convert a struct timespec into a 64-bit change attribute
574 *
575 * This does approximately the same thing as timespec_to_ns(),
576 * but for calculation efficiency, we multiply the seconds by
577 * 1024*1024*1024.
578 */
579static inline
580u64 nfs_timespec_to_change_attr(const struct timespec *ts)
581{
582 return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
583}
Trond Myklebust1264a2f2013-08-12 16:06:31 -0400584
585#ifdef CONFIG_CRC32
586/**
587 * nfs_fhandle_hash - calculate the crc32 hash for the filehandle
588 * @fh - pointer to filehandle
589 *
590 * returns a crc32 hash for the filehandle that is compatible with
591 * the one displayed by "wireshark".
592 */
593static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
594{
595 return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size);
596}
597#else
598static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
599{
600 return 0;
601}
602#endif