NFS: Be more targeted about readdirplus use when doing lookup/revalidation
[linux-block.git] / fs / nfs / internal.h
CommitLineData
f7b422b1
DH
1/*
2 * NFS internal definitions
3 */
4
eedc020e 5#include "nfs4_fs.h"
f7b422b1 6#include <linux/mount.h>
f9c3a380 7#include <linux/security.h>
1264a2f0 8#include <linux/crc32.h>
47af81f2 9#include <linux/nfs_page.h>
f7b422b1 10
08734048
DH
11#define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS)
12
54ceac45 13struct nfs_string;
54ceac45
DH
14
15/* Maximum number of readahead requests
16 * FIXME: this should really be a sysctl so that users may tune it to suit
17 * their needs. People that do NFS over a slow network, might for
18 * instance want to reduce it to something closer to 1 for improved
19 * interactive response.
20 */
21#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
22
7ebb9315
BS
23static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr)
24{
25 if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid))
26 fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT;
27}
28
533eb461
AA
29static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr)
30{
31 if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) ||
32 (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) &&
33 ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0)))
34 return 0;
533eb461
AA
35 return 1;
36}
37
f7b422b1
DH
38struct 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;
6677d095
CL
45 struct sockaddr *addr;
46 size_t addrlen;
f7b422b1
DH
47 rpc_authflavor_t authflavor;
48};
49
a14017db
CL
50/*
51 * 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
4cfd74fc
CL
56/*
57 * Value used if the user did not specify a port value.
58 */
59#define NFS_UNSPEC_PORT (-1)
60
a956beda
TM
61#define NFS_UNSPEC_RETRANS (UINT_MAX)
62#define NFS_UNSPEC_TIMEO (UINT_MAX)
63
56e4ebf8
BS
64/*
65 * Maximum number of pages that readdir can use for creating
66 * a vmapped array of pages.
67 */
68#define NFS_MAX_READDIR_PAGES 8
69
fcf10398
BS
70struct nfs_client_initdata {
71 unsigned long init_flags;
5c6e5b60
TM
72 const char *hostname; /* Hostname of the server */
73 const struct sockaddr *addr; /* Address of the server */
74 const char *nodename; /* Hostname of the client */
75 const char *ip_addr; /* IP address of the client */
fcf10398 76 size_t addrlen;
ab7017a3 77 struct nfs_subversion *nfs_mod;
fcf10398
BS
78 int proto;
79 u32 minorversion;
80 struct net *net;
5c6e5b60 81 const struct rpc_timeout *timeparms;
fcf10398
BS
82};
83
6b18eaa0
TT
84/*
85 * In-kernel mount arguments
86 */
87struct nfs_parsed_mount_data {
88 int flags;
8cb7f74e
CL
89 unsigned int rsize, wsize;
90 unsigned int timeo, retrans;
91 unsigned int acregmin, acregmax,
6b18eaa0 92 acdirmin, acdirmax;
8cb7f74e 93 unsigned int namlen;
b797cac7 94 unsigned int options;
6b18eaa0 95 unsigned int bsize;
a3f73c27
WAA
96 struct nfs_auth_info auth_info;
97 rpc_authflavor_t selected_flavor;
6b18eaa0 98 char *client_address;
764302cc 99 unsigned int version;
3fd5be9e 100 unsigned int minorversion;
08734048 101 char *fscache_uniq;
b72e4f42 102 bool need_mount;
6b18eaa0
TT
103
104 struct {
4c568017
CL
105 struct sockaddr_storage address;
106 size_t addrlen;
6b18eaa0 107 char *hostname;
78fa701f 108 u32 version;
4cfd74fc 109 int port;
78fa701f 110 unsigned short protocol;
6b18eaa0
TT
111 } mount_server;
112
113 struct {
4c568017
CL
114 struct sockaddr_storage address;
115 size_t addrlen;
6b18eaa0
TT
116 char *hostname;
117 char *export_path;
4cfd74fc 118 int port;
78fa701f 119 unsigned short protocol;
6b18eaa0 120 } nfs_server;
f9c3a380
EP
121
122 struct security_mnt_opts lsm_opts;
e50a7a1a 123 struct net *net;
6b18eaa0
TT
124};
125
146ec944 126/* mount_clnt.c */
c5d120f8
CL
127struct nfs_mount_request {
128 struct sockaddr *sap;
129 size_t salen;
130 char *hostname;
131 char *dirpath;
132 u32 version;
133 unsigned short protocol;
134 struct nfs_fh *fh;
50a737f8 135 int noresvport;
8e02f6b9
CL
136 unsigned int *auth_flav_len;
137 rpc_authflavor_t *auth_flavs;
6d59b8d5 138 struct net *net;
c5d120f8
CL
139};
140
fbdefd64
BS
141struct nfs_mount_info {
142 void (*fill_super)(struct super_block *, struct nfs_mount_info *);
143 int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *);
144 struct nfs_parsed_mount_data *parsed;
145 struct nfs_clone_mount *cloned;
146 struct nfs_fh *mntfh;
147};
148
c5d120f8 149extern int nfs_mount(struct nfs_mount_request *info);
0b524123 150extern void nfs_umount(const struct nfs_mount_request *info);
146ec944 151
24c8dbbb 152/* client.c */
a613fa16 153extern const struct rpc_program nfs_program;
6b13168b 154extern void nfs_clients_init(struct net *net);
6663ee7f 155extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *);
5c6e5b60 156int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t);
7d38de3f 157struct nfs_client *nfs_get_client(const struct nfs_client_initdata *);
fcf10398
BS
158int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *);
159void nfs_server_insert_lists(struct nfs_server *);
32e62b7c 160void nfs_server_remove_lists(struct nfs_server *);
a956beda 161void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans);
fcf10398
BS
162int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t,
163 rpc_authflavor_t);
164struct nfs_server *nfs_alloc_server(void);
165void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *);
54ceac45 166
28cd1b3f 167extern void nfs_cleanup_cb_ident_idr(struct net *);
24c8dbbb 168extern void nfs_put_client(struct nfs_client *);
cdb7eced 169extern void nfs_free_client(struct nfs_client *);
28cd1b3f 170extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
c36fca52 171extern struct nfs_client *
c7add9a9 172nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
459de2ed 173 struct nfs4_sessionid *, u32);
1179acc6 174extern struct nfs_server *nfs_create_server(struct nfs_mount_info *,
ab7017a3 175 struct nfs_subversion *);
91ea40b9 176extern struct nfs_server *nfs4_create_server(
1179acc6
BS
177 struct nfs_mount_info *,
178 struct nfs_subversion *);
54ceac45
DH
179extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *,
180 struct nfs_fh *);
32e62b7c 181extern int nfs4_update_server(struct nfs_server *server, const char *hostname,
292f503c
TM
182 struct sockaddr *sap, size_t salen,
183 struct net *net);
54ceac45
DH
184extern void nfs_free_server(struct nfs_server *server);
185extern struct nfs_server *nfs_clone_server(struct nfs_server *,
186 struct nfs_fh *,
7e6eb683
BS
187 struct nfs_fattr *,
188 rpc_authflavor_t);
4697bd5e 189extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
76db6d95 190extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
3fc75f12 191extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv,
d83217c1 192 const struct sockaddr *ds_addr,
98fc685a
AA
193 int ds_addrlen, int ds_proto,
194 unsigned int ds_timeo,
064172f3 195 unsigned int ds_retrans,
7d38de3f 196 u32 minor_version);
0e20162e
AA
197extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
198 struct inode *);
b224f7cb 199extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv,
1a04c6e1
PT
200 const struct sockaddr *ds_addr, int ds_addrlen,
201 int ds_proto, unsigned int ds_timeo,
7d38de3f 202 unsigned int ds_retrans);
6aaca566
DH
203#ifdef CONFIG_PROC_FS
204extern int __init nfs_fs_proc_init(void);
205extern void nfs_fs_proc_exit(void);
65b38851
EB
206extern int nfs_fs_proc_net_init(struct net *net);
207extern void nfs_fs_proc_net_exit(struct net *net);
6aaca566 208#else
65b38851
EB
209static inline int nfs_fs_proc_net_init(struct net *net)
210{
211 return 0;
212}
213static inline void nfs_fs_proc_net_exit(struct net *net)
214{
215}
6aaca566
DH
216static inline int nfs_fs_proc_init(void)
217{
218 return 0;
219}
220static inline void nfs_fs_proc_exit(void)
221{
222}
223#endif
24c8dbbb 224
f7b422b1
DH
225/* callback_xdr.c */
226extern struct svc_version nfs4_callback_version1;
07bccc2d 227extern struct svc_version nfs4_callback_version4;
f7b422b1 228
4db6e0b7 229struct nfs_pageio_descriptor;
f7b422b1
DH
230/* pagelist.c */
231extern int __init nfs_init_nfspagecache(void);
266bee88 232extern void nfs_destroy_nfspagecache(void);
f7b422b1 233extern int __init nfs_init_readpagecache(void);
266bee88 234extern void nfs_destroy_readpagecache(void);
f7b422b1 235extern int __init nfs_init_writepagecache(void);
266bee88 236extern void nfs_destroy_writepagecache(void);
f7b422b1 237
f7b422b1 238extern int __init nfs_init_directcache(void);
266bee88 239extern void nfs_destroy_directcache(void);
4db6e0b7
FI
240extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
241 struct nfs_pgio_header *hdr,
242 void (*release)(struct nfs_pgio_header *hdr));
243void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
210c7c17 244int nfs_iocounter_wait(struct nfs_lock_context *l_ctx);
577b4232 245
41d8d5b7 246extern const struct nfs_pageio_ops nfs_pgio_rw_ops;
1e7f3a48
WAA
247struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *);
248void nfs_pgio_header_free(struct nfs_pgio_header *);
d45f60c6 249void nfs_pgio_data_destroy(struct nfs_pgio_header *);
ef2c488c 250int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *);
46a5ab47
PT
251int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr,
252 struct rpc_cred *cred, const struct nfs_rpc_ops *rpc_ops,
253 const struct rpc_call_ops *call_ops, int how, int flags);
d4581383 254void nfs_free_request(struct nfs_page *req);
48d635f1
PT
255struct nfs_pgio_mirror *
256nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc);
00bfa30a 257
47af81f2
PT
258static inline bool nfs_pgio_has_mirroring(struct nfs_pageio_descriptor *desc)
259{
260 WARN_ON_ONCE(desc->pg_mirror_count < 1);
261 return desc->pg_mirror_count > 1;
262}
263
138a2935
TM
264static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1,
265 const struct nfs_open_context *ctx2)
266{
267 return ctx1->cred == ctx2->cred && ctx1->state == ctx2->state;
268}
269
f7b422b1
DH
270/* nfs2xdr.c */
271extern struct rpc_procinfo nfs_procedures[];
573c4e1e
CL
272extern int nfs2_decode_dirent(struct xdr_stream *,
273 struct nfs_entry *, int);
f7b422b1
DH
274
275/* nfs3xdr.c */
276extern struct rpc_procinfo nfs3_procedures[];
573c4e1e
CL
277extern int nfs3_decode_dirent(struct xdr_stream *,
278 struct nfs_entry *, int);
f7b422b1
DH
279
280/* nfs4xdr.c */
89d77c8f 281#if IS_ENABLED(CONFIG_NFS_V4)
573c4e1e
CL
282extern int nfs4_decode_dirent(struct xdr_stream *,
283 struct nfs_entry *, int);
7d4e2747 284#endif
2449ea2e
AB
285#ifdef CONFIG_NFS_V4_1
286extern const u32 nfs41_maxread_overhead;
287extern const u32 nfs41_maxwrite_overhead;
f1c097be 288extern const u32 nfs41_maxgetdevinfo_overhead;
2449ea2e 289#endif
f7b422b1
DH
290
291/* nfs4proc.c */
89d77c8f 292#if IS_ENABLED(CONFIG_NFS_V4)
f7b422b1 293extern struct rpc_procinfo nfs4_procedures[];
d75d5414 294#endif
f7b422b1 295
694e096f
AS
296#ifdef CONFIG_NFS_V4_SECURITY_LABEL
297extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags);
a49c2691
KM
298static inline struct nfs4_label *
299nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
300{
301 if (!dst || !src)
302 return NULL;
303
304 if (src->len > NFS4_MAXLABELLEN)
305 return NULL;
306
307 dst->lfs = src->lfs;
308 dst->pi = src->pi;
309 dst->len = src->len;
310 memcpy(dst->label, src->label, src->len);
311
312 return dst;
313}
694e096f
AS
314static inline void nfs4_label_free(struct nfs4_label *label)
315{
316 if (label) {
317 kfree(label->label);
318 kfree(label);
319 }
320 return;
321}
fd1defc2
TM
322
323static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
324{
325 if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL))
326 nfsi->cache_validity |= NFS_INO_INVALID_LABEL;
327}
694e096f
AS
328#else
329static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; }
330static inline void nfs4_label_free(void *label) {}
fd1defc2
TM
331static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
332{
333}
a49c2691
KM
334static inline struct nfs4_label *
335nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
336{
337 return NULL;
338}
694e096f
AS
339#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
340
7fe5c398
TM
341/* proc.c */
342void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
8cab4c39 343extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
5c6e5b60 344 const struct nfs_client_initdata *);
7fe5c398 345
979df72e 346/* dir.c */
311324ad 347extern void nfs_force_use_readdirplus(struct inode *dir);
1ab6c499
DC
348extern unsigned long nfs_access_cache_count(struct shrinker *shrink,
349 struct shrink_control *sc);
350extern unsigned long nfs_access_cache_scan(struct shrinker *shrink,
351 struct shrink_control *sc);
597d9289
BS
352struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
353int nfs_create(struct inode *, struct dentry *, umode_t, bool);
354int nfs_mkdir(struct inode *, struct dentry *, umode_t);
355int nfs_rmdir(struct inode *, struct dentry *);
356int nfs_unlink(struct inode *, struct dentry *);
357int nfs_symlink(struct inode *, struct dentry *, const char *);
358int nfs_link(struct dentry *, struct inode *, struct dentry *);
359int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
1cd66c93
MS
360int nfs_rename(struct inode *, struct dentry *,
361 struct inode *, struct dentry *, unsigned int);
979df72e 362
ce4ef7c0 363/* file.c */
4ff79bc7 364int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync);
ce4ef7c0 365loff_t nfs_file_llseek(struct file *, loff_t, int);
3aa2d199 366ssize_t nfs_file_read(struct kiocb *, struct iov_iter *);
ce4ef7c0 367int nfs_file_mmap(struct file *, struct vm_area_struct *);
edaf4369 368ssize_t nfs_file_write(struct kiocb *, struct iov_iter *);
ce4ef7c0
BS
369int nfs_file_release(struct inode *, struct file *);
370int nfs_lock(struct file *, int, struct file_lock *);
371int nfs_flock(struct file *, int, struct file_lock *);
ce4ef7c0 372int nfs_check_flags(int);
ce4ef7c0 373
f7b422b1 374/* inode.c */
5746006f 375extern struct workqueue_struct *nfsiod_workqueue;
f7b422b1
DH
376extern struct inode *nfs_alloc_inode(struct super_block *sb);
377extern void nfs_destroy_inode(struct inode *);
a9185b41 378extern int nfs_write_inode(struct inode *, struct writeback_control *);
eed99357 379extern int nfs_drop_inode(struct inode *);
19d87ca3 380extern void nfs_clear_inode(struct inode *);
b57922d9 381extern void nfs_evict_inode(struct inode *);
f41f7418 382void nfs_zap_acl_cache(struct inode *inode);
dfd01f02 383extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode);
210c7c17 384extern int nfs_wait_atomic_killable(atomic_t *p);
f7b422b1
DH
385
386/* super.c */
6a74490d 387extern const struct super_operations nfs_sops;
ab7017a3 388extern struct file_system_type nfs_fs_type;
54ceac45 389extern struct file_system_type nfs_xdev_fs_type;
89d77c8f 390#if IS_ENABLED(CONFIG_NFS_V4)
54ceac45
DH
391extern struct file_system_type nfs4_xdev_fs_type;
392extern struct file_system_type nfs4_referral_fs_type;
f7b422b1 393#endif
4d4b69dd 394bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t);
ff9099f2
BS
395struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *,
396 struct nfs_subversion *);
fbdefd64
BS
397void nfs_initialise_sb(struct super_block *);
398int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
399int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
ab7017a3
BS
400struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *,
401 struct nfs_mount_info *, struct nfs_subversion *);
fbdefd64
BS
402struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *);
403struct dentry * nfs_xdev_mount_common(struct file_system_type *, int,
404 const char *, struct nfs_mount_info *);
405void nfs_kill_super(struct super_block *);
406void nfs_fill_super(struct super_block *, struct nfs_mount_info *);
4ebd9ab3 407
f7b422b1 408extern struct rpc_stat nfs_rpcstat;
4ebd9ab3 409
f7b422b1
DH
410extern int __init register_nfs_fs(void);
411extern void __exit unregister_nfs_fs(void);
ea7c38fe 412extern bool nfs_sb_active(struct super_block *sb);
1daef0a8 413extern void nfs_sb_deactive(struct super_block *sb);
f7b422b1 414
a5864c99
TM
415/* io.c */
416extern void nfs_start_io_read(struct inode *inode);
417extern void nfs_end_io_read(struct inode *inode);
418extern void nfs_start_io_write(struct inode *inode);
419extern void nfs_end_io_write(struct inode *inode);
420extern void nfs_start_io_direct(struct inode *inode);
421extern void nfs_end_io_direct(struct inode *inode);
422
651b0e70
TM
423static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi)
424{
425 return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0;
426}
427
f7b422b1 428/* namespace.c */
97a54868 429#define NFS_PATH_CANONICAL 1
b514f872 430extern char *nfs_path(char **p, struct dentry *dentry,
97a54868 431 char *buffer, ssize_t buflen, unsigned flags);
36d43a43 432extern struct vfsmount *nfs_d_automount(struct path *path);
281cad46
BS
433struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *,
434 struct nfs_fh *, struct nfs_fattr *);
435struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *,
436 struct nfs_fattr *, rpc_authflavor_t);
f7b422b1 437
54ceac45 438/* getroot.c */
0d5839ad
AV
439extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *,
440 const char *);
89d77c8f 441#if IS_ENABLED(CONFIG_NFS_V4)
0d5839ad
AV
442extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *,
443 const char *);
54ceac45 444
5e6b1990 445extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool);
7d4e2747 446#endif
f7b422b1 447
061ae2ed 448struct nfs_pgio_completion_ops;
f11c88af 449/* read.c */
584aa810 450extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
fab5fc25 451 struct inode *inode, bool force_mds,
584aa810 452 const struct nfs_pgio_completion_ops *compl_ops);
f11c88af 453extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
493292dd 454extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
e885de1a 455
fbdefd64
BS
456/* super.c */
457void nfs_clone_super(struct super_block *, struct nfs_mount_info *);
458void nfs_umount_begin(struct super_block *);
459int nfs_statfs(struct dentry *, struct kstatfs *);
460int nfs_show_options(struct seq_file *, struct dentry *);
461int nfs_show_devname(struct seq_file *, struct dentry *);
462int nfs_show_path(struct seq_file *, struct dentry *);
463int nfs_show_stats(struct seq_file *, struct dentry *);
fbdefd64
BS
464int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
465
def6ed7e 466/* write.c */
1763da12 467extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
a20c93e3 468 struct inode *inode, int ioflags, bool force_mds,
1763da12 469 const struct nfs_pgio_completion_ops *compl_ops);
dce81290 470extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
0b7c0153 471extern void nfs_commit_free(struct nfs_commit_data *p);
def6ed7e 472extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
0b7c0153
FI
473extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
474extern int nfs_initiate_commit(struct rpc_clnt *clnt,
475 struct nfs_commit_data *data,
c36aae9a 476 const struct nfs_rpc_ops *nfs_ops,
e0c2b380 477 const struct rpc_call_ops *call_ops,
9f0ec176 478 int how, int flags);
0b7c0153 479extern void nfs_init_commit(struct nfs_commit_data *data,
e0c2b380 480 struct list_head *head,
f453a54a
FI
481 struct pnfs_layout_segment *lseg,
482 struct nfs_commit_info *cinfo);
1763da12
FI
483int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
484 struct nfs_commit_info *cinfo, int max);
ce59515c 485unsigned long nfs_reqs_to_commit(struct nfs_commit_info *);
1763da12
FI
486int nfs_scan_commit(struct inode *inode, struct list_head *dst,
487 struct nfs_commit_info *cinfo);
488void nfs_mark_request_commit(struct nfs_page *req,
489 struct pnfs_layout_segment *lseg,
b57ff130
WAA
490 struct nfs_commit_info *cinfo,
491 u32 ds_commit_idx);
c65e6254 492int nfs_write_need_commit(struct nfs_pgio_header *);
a08a8cd3 493void nfs_writeback_update_inode(struct nfs_pgio_header *hdr);
67911c8f 494int nfs_commit_file(struct file *file, struct nfs_write_verifier *verf);
1763da12
FI
495int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
496 int how, struct nfs_commit_info *cinfo);
e0c2b380 497void nfs_retry_commit(struct list_head *page_list,
ea2cf228 498 struct pnfs_layout_segment *lseg,
b57ff130
WAA
499 struct nfs_commit_info *cinfo,
500 u32 ds_commit_idx);
0b7c0153 501void nfs_commitdata_release(struct nfs_commit_data *data);
6272dcc6 502void nfs_request_add_commit_list(struct nfs_page *req,
ea2cf228 503 struct nfs_commit_info *cinfo);
86d80f97
TM
504void nfs_request_add_commit_list_locked(struct nfs_page *req,
505 struct list_head *dst,
506 struct nfs_commit_info *cinfo);
ea2cf228
FI
507void nfs_request_remove_commit_list(struct nfs_page *req,
508 struct nfs_commit_info *cinfo);
509void nfs_init_cinfo(struct nfs_commit_info *cinfo,
510 struct inode *inode,
511 struct nfs_direct_req *dreq);
dc24826b 512int nfs_key_timeout_notify(struct file *filp, struct inode *inode);
ce52914e 513bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode);
a7d42ddb 514void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio);
e0c2b380 515
837bb1d7
TM
516int nfs_filemap_write_and_wait_range(struct address_space *mapping,
517 loff_t lstart, loff_t lend);
518
a5314a74
TM
519#ifdef CONFIG_NFS_V4_1
520static inline
521void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
522{
523 int i;
524
525 for (i = 0; i < cinfo->nbuckets; i++)
526 cinfo->buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW;
527}
528#else
529static inline
530void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
531{
532}
533#endif
534
074cc1de
TM
535#ifdef CONFIG_MIGRATION
536extern int nfs_migrate_page(struct address_space *,
a6bc32b8 537 struct page *, struct page *, enum migrate_mode);
074cc1de 538#endif
def6ed7e 539
8fc3c386
TM
540static inline int
541nfs_write_verifier_cmp(const struct nfs_write_verifier *v1,
542 const struct nfs_write_verifier *v2)
543{
544 return memcmp(v1->data, v2->data, sizeof(v1->data));
545}
546
0e862a40
JL
547/* unlink.c */
548extern struct rpc_task *
549nfs_async_rename(struct inode *old_dir, struct inode *new_dir,
550 struct dentry *old_dentry, struct dentry *new_dentry,
551 void (*complete)(struct rpc_task *, struct nfs_renamedata *));
552extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry);
553
1763da12
FI
554/* direct.c */
555void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
556 struct nfs_direct_req *dreq);
6296556f 557extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
1763da12 558
cccef3b9 559/* nfs4proc.c */
8cab4c39 560extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
5c6e5b60 561 const struct nfs_client_initdata *);
05f4c350
CL
562extern int nfs40_walk_client_list(struct nfs_client *clp,
563 struct nfs_client **result,
564 struct rpc_cred *cred);
565extern int nfs41_walk_client_list(struct nfs_client *clp,
566 struct nfs_client **result,
567 struct rpc_cred *cred);
04fa2c6b
AA
568extern int nfs4_test_session_trunk(struct rpc_clnt *,
569 struct rpc_xprt *,
570 void *);
cccef3b9 571
ea7c38fe
TM
572static inline struct inode *nfs_igrab_and_active(struct inode *inode)
573{
574 inode = igrab(inode);
575 if (inode != NULL && !nfs_sb_active(inode->i_sb)) {
576 iput(inode);
577 inode = NULL;
578 }
579 return inode;
580}
581
582static inline void nfs_iput_and_deactive(struct inode *inode)
583{
584 if (inode != NULL) {
585 struct super_block *sb = inode->i_sb;
586
587 iput(inode);
588 nfs_sb_deactive(sb);
589 }
590}
591
f7b422b1
DH
592/*
593 * Determine the device name as a string
594 */
b514f872 595static inline char *nfs_devname(struct dentry *dentry,
54ceac45 596 char *buffer, ssize_t buflen)
f7b422b1 597{
b514f872 598 char *dummy;
97a54868 599 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
f7b422b1
DH
600}
601
602/*
603 * Determine the actual block size (and log2 thereof)
604 */
605static inline
606unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
607{
608 /* make sure blocksize is a power of two */
609 if ((bsize & (bsize - 1)) || nrbitsp) {
610 unsigned char nrbits;
611
612 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
613 ;
614 bsize = 1 << nrbits;
615 if (nrbitsp)
616 *nrbitsp = nrbits;
617 }
618
619 return bsize;
620}
621
622/*
623 * Calculate the number of 512byte blocks used.
624 */
9eaa67c6 625static inline blkcnt_t nfs_calc_block_size(u64 tsize)
f7b422b1 626{
9eaa67c6 627 blkcnt_t used = (tsize + 511) >> 9;
f7b422b1
DH
628 return (used > ULONG_MAX) ? ULONG_MAX : used;
629}
630
631/*
632 * Compute and set NFS server blocksize
633 */
634static inline
635unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
636{
637 if (bsize < NFS_MIN_FILE_IO_SIZE)
638 bsize = NFS_DEF_FILE_IO_SIZE;
639 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
640 bsize = NFS_MAX_FILE_IO_SIZE;
641
642 return nfs_block_bits(bsize, nrbitsp);
643}
644
645/*
646 * Determine the maximum file size for a superblock
647 */
648static inline
649void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
650{
651 sb->s_maxbytes = (loff_t)maxfilesize;
652 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
653 sb->s_maxbytes = MAX_LFS_FILESIZE;
654}
49a70f27 655
d15bc38d
TH
656/*
657 * Record the page as unstable and mark its inode as dirty.
658 */
659static inline
86d80f97 660void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo)
d15bc38d 661{
86d80f97
TM
662 if (!cinfo->dreq) {
663 struct inode *inode = page_file_mapping(page)->host;
d15bc38d 664
11fb9989 665 inc_node_page_state(page, NR_UNSTABLE_NFS);
86d80f97
TM
666 inc_wb_stat(&inode_to_bdi(inode)->wb, WB_RECLAIMABLE);
667 __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
668 }
d15bc38d
TH
669}
670
49a70f27
TM
671/*
672 * Determine the number of bytes of data the page contains
673 */
674static inline
675unsigned int nfs_page_length(struct page *page)
676{
d56b4ddf 677 loff_t i_size = i_size_read(page_file_mapping(page)->host);
49a70f27
TM
678
679 if (i_size > 0) {
8cd79788 680 pgoff_t index = page_index(page);
09cbfeaf 681 pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT;
8cd79788 682 if (index < end_index)
09cbfeaf 683 return PAGE_SIZE;
8cd79788 684 if (index == end_index)
09cbfeaf 685 return ((i_size - 1) & ~PAGE_MASK) + 1;
49a70f27
TM
686 }
687 return 0;
688}
8d5658c9 689
0b26a0bf
TM
690/*
691 * Convert a umode to a dirent->d_type
692 */
693static inline
694unsigned char nfs_umode_to_dtype(umode_t mode)
695{
696 return (mode >> 12) & 15;
697}
698
8d5658c9
TM
699/*
700 * Determine the number of pages in an array of length 'len' and
701 * with a base offset of 'base'
702 */
703static inline
704unsigned int nfs_page_array_len(unsigned int base, size_t len)
705{
706 return ((unsigned long)len + (unsigned long)base +
707 PAGE_SIZE - 1) >> PAGE_SHIFT;
708}
0110ee15 709
3a1556e8
TM
710/*
711 * Convert a struct timespec into a 64-bit change attribute
712 *
713 * This does approximately the same thing as timespec_to_ns(),
714 * but for calculation efficiency, we multiply the seconds by
715 * 1024*1024*1024.
716 */
717static inline
718u64 nfs_timespec_to_change_attr(const struct timespec *ts)
719{
720 return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
721}
1264a2f0
TM
722
723#ifdef CONFIG_CRC32
724/**
725 * nfs_fhandle_hash - calculate the crc32 hash for the filehandle
726 * @fh - pointer to filehandle
727 *
728 * returns a crc32 hash for the filehandle that is compatible with
729 * the one displayed by "wireshark".
730 */
731static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
732{
733 return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size);
734}
48c9579a
OK
735static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid)
736{
737 return ~crc32_le(0xFFFFFFFF, &stateid->other[0],
738 NFS4_STATEID_OTHER_SIZE);
739}
1264a2f0
TM
740#else
741static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
742{
743 return 0;
744}
48c9579a
OK
745static inline u32 nfs_stateid_hash(nfs4_stateid *stateid)
746{
747 return 0;
748}
1264a2f0 749#endif
0bcbf039
PT
750
751static inline bool nfs_error_is_fatal(int err)
752{
753 switch (err) {
754 case -ERESTARTSYS:
755 case -EIO:
756 case -ENOSPC:
757 case -EROFS:
758 case -E2BIG:
759 return true;
760 default:
761 return false;
762 }
763}