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switch generic_file_splice_read() to use of ->read_iter()
[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);
fcf10398 157struct nfs_client *nfs_get_client(const struct nfs_client_initdata *,
fcf10398
BS		 158 rpc_authflavor_t);
159int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *);
160void nfs_server_insert_lists(struct nfs_server *);
32e62b7c 161void nfs_server_remove_lists(struct nfs_server *);
a956beda 162void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans);
fcf10398
BS		 163int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t,
164 rpc_authflavor_t);
165struct nfs_server *nfs_alloc_server(void);
166void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *);
54ceac45 167
28cd1b3f 168extern void nfs_cleanup_cb_ident_idr(struct net *);
24c8dbbb 169extern void nfs_put_client(struct nfs_client *);
cdb7eced 170extern void nfs_free_client(struct nfs_client *);
28cd1b3f 171extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
c36fca52 172extern struct nfs_client *
c7add9a9 173nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
459de2ed 174 struct nfs4_sessionid *, u32);
1179acc6 175extern struct nfs_server *nfs_create_server(struct nfs_mount_info *,
ab7017a3 176 struct nfs_subversion *);
91ea40b9 177extern struct nfs_server *nfs4_create_server(
1179acc6
BS		 178 struct nfs_mount_info *,
179 struct nfs_subversion *);
54ceac45
DH		 180extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *,
181 struct nfs_fh *);
32e62b7c 182extern int nfs4_update_server(struct nfs_server *server, const char *hostname,
292f503c
TM		 183 struct sockaddr *sap, size_t salen,
184 struct net *net);
54ceac45
DH		 185extern void nfs_free_server(struct nfs_server *server);
186extern struct nfs_server *nfs_clone_server(struct nfs_server *,
187 struct nfs_fh *,
7e6eb683
BS		 188 struct nfs_fattr *,
189 rpc_authflavor_t);
4697bd5e 190extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
76db6d95 191extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
3fc75f12 192extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv,
d83217c1 193 const struct sockaddr *ds_addr,
98fc685a
AA		 194 int ds_addrlen, int ds_proto,
195 unsigned int ds_timeo,
064172f3 196 unsigned int ds_retrans,
30626f9c 197 u32 minor_version,
064172f3 198 rpc_authflavor_t au_flavor);
0e20162e
AA		 199extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
200 struct inode *);
b224f7cb 201extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv,
1a04c6e1
PT		 202 const struct sockaddr *ds_addr, int ds_addrlen,
203 int ds_proto, unsigned int ds_timeo,
204 unsigned int ds_retrans, rpc_authflavor_t au_flavor);
6aaca566
DH		 205#ifdef CONFIG_PROC_FS
206extern int __init nfs_fs_proc_init(void);
207extern void nfs_fs_proc_exit(void);
65b38851
EB		 208extern int nfs_fs_proc_net_init(struct net *net);
209extern void nfs_fs_proc_net_exit(struct net *net);
6aaca566 210#else
65b38851
EB		 211static inline int nfs_fs_proc_net_init(struct net *net)
212{
213 return 0;
214}
215static inline void nfs_fs_proc_net_exit(struct net *net)
216{
217}
6aaca566
DH		 218static inline int nfs_fs_proc_init(void)
219{
220 return 0;
221}
222static inline void nfs_fs_proc_exit(void)
223{
224}
225#endif
24c8dbbb 226
f7b422b1
DH		 227/* callback_xdr.c */
228extern struct svc_version nfs4_callback_version1;
07bccc2d 229extern struct svc_version nfs4_callback_version4;
f7b422b1 230
4db6e0b7 231struct nfs_pageio_descriptor;
f7b422b1
DH		 232/* pagelist.c */
233extern int __init nfs_init_nfspagecache(void);
266bee88 234extern void nfs_destroy_nfspagecache(void);
f7b422b1 235extern int __init nfs_init_readpagecache(void);
266bee88 236extern void nfs_destroy_readpagecache(void);
f7b422b1 237extern int __init nfs_init_writepagecache(void);
266bee88 238extern void nfs_destroy_writepagecache(void);
f7b422b1 239
f7b422b1 240extern int __init nfs_init_directcache(void);
266bee88 241extern void nfs_destroy_directcache(void);
4db6e0b7
FI		 242extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
243 struct nfs_pgio_header *hdr,
244 void (*release)(struct nfs_pgio_header *hdr));
245void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
210c7c17 246int nfs_iocounter_wait(struct nfs_lock_context *l_ctx);
577b4232 247
41d8d5b7 248extern const struct nfs_pageio_ops nfs_pgio_rw_ops;
1e7f3a48
WAA		 249struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *);
250void nfs_pgio_header_free(struct nfs_pgio_header *);
d45f60c6 251void nfs_pgio_data_destroy(struct nfs_pgio_header *);
ef2c488c 252int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *);
46a5ab47
PT		 253int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr,
254 struct rpc_cred *cred, const struct nfs_rpc_ops *rpc_ops,
255 const struct rpc_call_ops *call_ops, int how, int flags);
d4581383 256void nfs_free_request(struct nfs_page *req);
48d635f1
PT		 257struct nfs_pgio_mirror *
258nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc);
00bfa30a 259
47af81f2
PT		 260static inline bool nfs_pgio_has_mirroring(struct nfs_pageio_descriptor *desc)
261{
262 WARN_ON_ONCE(desc->pg_mirror_count < 1);
263 return desc->pg_mirror_count > 1;
264}
265
138a2935
TM		 266static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1,
267 const struct nfs_open_context *ctx2)
268{
269 return ctx1->cred == ctx2->cred && ctx1->state == ctx2->state;
270}
271
f7b422b1
DH		 272/* nfs2xdr.c */
273extern struct rpc_procinfo nfs_procedures[];
573c4e1e
CL		 274extern int nfs2_decode_dirent(struct xdr_stream *,
275 struct nfs_entry *, int);
f7b422b1
DH		 276
277/* nfs3xdr.c */
278extern struct rpc_procinfo nfs3_procedures[];
573c4e1e
CL		 279extern int nfs3_decode_dirent(struct xdr_stream *,
280 struct nfs_entry *, int);
f7b422b1
DH		 281
282/* nfs4xdr.c */
89d77c8f 283#if IS_ENABLED(CONFIG_NFS_V4)
573c4e1e
CL		 284extern int nfs4_decode_dirent(struct xdr_stream *,
285 struct nfs_entry *, int);
7d4e2747 286#endif
2449ea2e
AB		 287#ifdef CONFIG_NFS_V4_1
288extern const u32 nfs41_maxread_overhead;
289extern const u32 nfs41_maxwrite_overhead;
f1c097be 290extern const u32 nfs41_maxgetdevinfo_overhead;
2449ea2e 291#endif
f7b422b1
DH		 292
293/* nfs4proc.c */
89d77c8f 294#if IS_ENABLED(CONFIG_NFS_V4)
f7b422b1 295extern struct rpc_procinfo nfs4_procedures[];
d75d5414 296#endif
f7b422b1 297
694e096f
AS		 298#ifdef CONFIG_NFS_V4_SECURITY_LABEL
299extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags);
a49c2691
KM		 300static inline struct nfs4_label *
301nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
302{
303 if (!dst || !src)
304 return NULL;
305
306 if (src->len > NFS4_MAXLABELLEN)
307 return NULL;
308
309 dst->lfs = src->lfs;
310 dst->pi = src->pi;
311 dst->len = src->len;
312 memcpy(dst->label, src->label, src->len);
313
314 return dst;
315}
694e096f
AS		 316static inline void nfs4_label_free(struct nfs4_label *label)
317{
318 if (label) {
319 kfree(label->label);
320 kfree(label);
321 }
322 return;
323}
fd1defc2
TM		 324
325static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
326{
327 if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL))
328 nfsi->cache_validity |= NFS_INO_INVALID_LABEL;
329}
694e096f
AS		 330#else
331static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; }
332static inline void nfs4_label_free(void *label) {}
fd1defc2
TM		 333static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
334{
335}
a49c2691
KM		 336static inline struct nfs4_label *
337nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
338{
339 return NULL;
340}
694e096f
AS		 341#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
342
7fe5c398
TM		 343/* proc.c */
344void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
8cab4c39 345extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
5c6e5b60 346 const struct nfs_client_initdata *);
7fe5c398 347
979df72e 348/* dir.c */
311324ad 349extern void nfs_force_use_readdirplus(struct inode *dir);
1ab6c499
DC		 350extern unsigned long nfs_access_cache_count(struct shrinker *shrink,
351 struct shrink_control *sc);
352extern unsigned long nfs_access_cache_scan(struct shrinker *shrink,
353 struct shrink_control *sc);
597d9289
BS		 354struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
355int nfs_create(struct inode *, struct dentry *, umode_t, bool);
356int nfs_mkdir(struct inode *, struct dentry *, umode_t);
357int nfs_rmdir(struct inode *, struct dentry *);
358int nfs_unlink(struct inode *, struct dentry *);
359int nfs_symlink(struct inode *, struct dentry *, const char *);
360int nfs_link(struct dentry *, struct inode *, struct dentry *);
361int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
362int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
979df72e 363
ce4ef7c0 364/* file.c */
4ff79bc7 365int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync);
ce4ef7c0 366loff_t nfs_file_llseek(struct file *, loff_t, int);
3aa2d199 367ssize_t nfs_file_read(struct kiocb *, struct iov_iter *);
ce4ef7c0 368int nfs_file_mmap(struct file *, struct vm_area_struct *);
edaf4369 369ssize_t nfs_file_write(struct kiocb *, struct iov_iter *);
ce4ef7c0
BS		 370int nfs_file_release(struct inode *, struct file *);
371int nfs_lock(struct file *, int, struct file_lock *);
372int nfs_flock(struct file *, int, struct file_lock *);
ce4ef7c0 373int nfs_check_flags(int);
ce4ef7c0 374
f7b422b1 375/* inode.c */
5746006f 376extern struct workqueue_struct *nfsiod_workqueue;
f7b422b1
DH		 377extern struct inode *nfs_alloc_inode(struct super_block *sb);
378extern void nfs_destroy_inode(struct inode *);
a9185b41 379extern int nfs_write_inode(struct inode *, struct writeback_control *);
eed99357 380extern int nfs_drop_inode(struct inode *);
19d87ca3 381extern void nfs_clear_inode(struct inode *);
b57922d9 382extern void nfs_evict_inode(struct inode *);
f41f7418 383void nfs_zap_acl_cache(struct inode *inode);
dfd01f02 384extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode);
210c7c17 385extern int nfs_wait_atomic_killable(atomic_t *p);
f7b422b1
DH		 386
387/* super.c */
6a74490d 388extern const struct super_operations nfs_sops;
ab7017a3 389extern struct file_system_type nfs_fs_type;
54ceac45 390extern struct file_system_type nfs_xdev_fs_type;
89d77c8f 391#if IS_ENABLED(CONFIG_NFS_V4)
54ceac45
DH		 392extern struct file_system_type nfs4_xdev_fs_type;
393extern struct file_system_type nfs4_referral_fs_type;
f7b422b1 394#endif
4d4b69dd 395bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t);
ff9099f2
BS		 396struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *,
397 struct nfs_subversion *);
fbdefd64
BS		 398void nfs_initialise_sb(struct super_block *);
399int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
400int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
ab7017a3
BS		 401struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *,
402 struct nfs_mount_info *, struct nfs_subversion *);
fbdefd64
BS		 403struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *);
404struct dentry * nfs_xdev_mount_common(struct file_system_type *, int,
405 const char *, struct nfs_mount_info *);
406void nfs_kill_super(struct super_block *);
407void nfs_fill_super(struct super_block *, struct nfs_mount_info *);
4ebd9ab3 408
f7b422b1 409extern struct rpc_stat nfs_rpcstat;
4ebd9ab3 410
f7b422b1
DH		 411extern int __init register_nfs_fs(void);
412extern void __exit unregister_nfs_fs(void);
ea7c38fe 413extern bool nfs_sb_active(struct super_block *sb);
1daef0a8 414extern void nfs_sb_deactive(struct super_block *sb);
f7b422b1 415
a5864c99
TM		 416/* io.c */
417extern void nfs_start_io_read(struct inode *inode);
418extern void nfs_end_io_read(struct inode *inode);
419extern void nfs_start_io_write(struct inode *inode);
420extern void nfs_end_io_write(struct inode *inode);
421extern void nfs_start_io_direct(struct inode *inode);
422extern void nfs_end_io_direct(struct inode *inode);
423
651b0e70
TM		 424static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi)
425{
426 return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0;
427}
428
f7b422b1 429/* namespace.c */
97a54868 430#define NFS_PATH_CANONICAL 1
b514f872 431extern char *nfs_path(char **p, struct dentry *dentry,
97a54868 432 char *buffer, ssize_t buflen, unsigned flags);
36d43a43 433extern struct vfsmount *nfs_d_automount(struct path *path);
281cad46
BS		 434struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *,
435 struct nfs_fh *, struct nfs_fattr *);
436struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *,
437 struct nfs_fattr *, rpc_authflavor_t);
f7b422b1 438
54ceac45 439/* getroot.c */
0d5839ad
AV		 440extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *,
441 const char *);
89d77c8f 442#if IS_ENABLED(CONFIG_NFS_V4)
0d5839ad
AV		 443extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *,
444 const char *);
54ceac45 445
5e6b1990 446extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool);
7d4e2747 447#endif
f7b422b1 448
061ae2ed 449struct nfs_pgio_completion_ops;
f11c88af 450/* read.c */
584aa810 451extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
fab5fc25 452 struct inode *inode, bool force_mds,
584aa810 453 const struct nfs_pgio_completion_ops *compl_ops);
f11c88af 454extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
493292dd 455extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
e885de1a 456
fbdefd64
BS		 457/* super.c */
458void nfs_clone_super(struct super_block *, struct nfs_mount_info *);
459void nfs_umount_begin(struct super_block *);
460int nfs_statfs(struct dentry *, struct kstatfs *);
461int nfs_show_options(struct seq_file *, struct dentry *);
462int nfs_show_devname(struct seq_file *, struct dentry *);
463int nfs_show_path(struct seq_file *, struct dentry *);
464int nfs_show_stats(struct seq_file *, struct dentry *);
fbdefd64
BS		 465int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
466
def6ed7e 467/* write.c */
1763da12 468extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
a20c93e3 469 struct inode *inode, int ioflags, bool force_mds,
1763da12 470 const struct nfs_pgio_completion_ops *compl_ops);
dce81290 471extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
0b7c0153 472extern void nfs_commit_free(struct nfs_commit_data *p);
def6ed7e 473extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
0b7c0153
FI		 474extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
475extern int nfs_initiate_commit(struct rpc_clnt *clnt,
476 struct nfs_commit_data *data,
c36aae9a 477 const struct nfs_rpc_ops *nfs_ops,
e0c2b380 478 const struct rpc_call_ops *call_ops,
9f0ec176 479 int how, int flags);
0b7c0153 480extern void nfs_init_commit(struct nfs_commit_data *data,
e0c2b380 481 struct list_head *head,
f453a54a
FI		 482 struct pnfs_layout_segment *lseg,
483 struct nfs_commit_info *cinfo);
1763da12
FI		 484int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
485 struct nfs_commit_info *cinfo, int max);
ce59515c 486unsigned long nfs_reqs_to_commit(struct nfs_commit_info *);
1763da12
FI		 487int nfs_scan_commit(struct inode *inode, struct list_head *dst,
488 struct nfs_commit_info *cinfo);
489void nfs_mark_request_commit(struct nfs_page *req,
490 struct pnfs_layout_segment *lseg,
b57ff130
WAA		 491 struct nfs_commit_info *cinfo,
492 u32 ds_commit_idx);
c65e6254 493int nfs_write_need_commit(struct nfs_pgio_header *);
a08a8cd3 494void nfs_writeback_update_inode(struct nfs_pgio_header *hdr);
67911c8f 495int nfs_commit_file(struct file *file, struct nfs_write_verifier *verf);
1763da12
FI		 496int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
497 int how, struct nfs_commit_info *cinfo);
e0c2b380 498void nfs_retry_commit(struct list_head *page_list,
ea2cf228 499 struct pnfs_layout_segment *lseg,
b57ff130
WAA		 500 struct nfs_commit_info *cinfo,
501 u32 ds_commit_idx);
0b7c0153 502void nfs_commitdata_release(struct nfs_commit_data *data);
6272dcc6 503void nfs_request_add_commit_list(struct nfs_page *req,
ea2cf228 504 struct nfs_commit_info *cinfo);
86d80f97
TM		 505void nfs_request_add_commit_list_locked(struct nfs_page *req,
506 struct list_head *dst,
507 struct nfs_commit_info *cinfo);
ea2cf228
FI		 508void nfs_request_remove_commit_list(struct nfs_page *req,
509 struct nfs_commit_info *cinfo);
510void nfs_init_cinfo(struct nfs_commit_info *cinfo,
511 struct inode *inode,
512 struct nfs_direct_req *dreq);
dc24826b 513int nfs_key_timeout_notify(struct file *filp, struct inode *inode);
ce52914e 514bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode);
a7d42ddb 515void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio);
e0c2b380 516
837bb1d7
TM		 517int nfs_filemap_write_and_wait_range(struct address_space *mapping,
518 loff_t lstart, loff_t lend);
519
a5314a74
TM		 520#ifdef CONFIG_NFS_V4_1
521static inline
522void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
523{
524 int i;
525
526 for (i = 0; i < cinfo->nbuckets; i++)
527 cinfo->buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW;
528}
529#else
530static inline
531void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
532{
533}
534#endif
535
536
074cc1de
TM		 537#ifdef CONFIG_MIGRATION
538extern int nfs_migrate_page(struct address_space *,
a6bc32b8 539 struct page *, struct page *, enum migrate_mode);
074cc1de
TM		 540#else
541#define nfs_migrate_page NULL
542#endif
def6ed7e 543
8fc3c386
TM		 544static inline int
545nfs_write_verifier_cmp(const struct nfs_write_verifier *v1,
546 const struct nfs_write_verifier *v2)
547{
548 return memcmp(v1->data, v2->data, sizeof(v1->data));
549}
550
0e862a40
JL		 551/* unlink.c */
552extern struct rpc_task *
553nfs_async_rename(struct inode *old_dir, struct inode *new_dir,
554 struct dentry *old_dentry, struct dentry *new_dentry,
555 void (*complete)(struct rpc_task *, struct nfs_renamedata *));
556extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry);
557
1763da12
FI		 558/* direct.c */
559void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
560 struct nfs_direct_req *dreq);
6296556f 561extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
1763da12 562
cccef3b9 563/* nfs4proc.c */
d45f60c6 564extern void __nfs4_read_done_cb(struct nfs_pgio_header *);
8cab4c39 565extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
5c6e5b60 566 const struct nfs_client_initdata *);
05f4c350
CL		 567extern int nfs40_walk_client_list(struct nfs_client *clp,
568 struct nfs_client **result,
569 struct rpc_cred *cred);
570extern int nfs41_walk_client_list(struct nfs_client *clp,
571 struct nfs_client **result,
572 struct rpc_cred *cred);
cccef3b9 573
ea7c38fe
TM		 574static inline struct inode *nfs_igrab_and_active(struct inode *inode)
575{
576 inode = igrab(inode);
577 if (inode != NULL && !nfs_sb_active(inode->i_sb)) {
578 iput(inode);
579 inode = NULL;
580 }
581 return inode;
582}
583
584static inline void nfs_iput_and_deactive(struct inode *inode)
585{
586 if (inode != NULL) {
587 struct super_block *sb = inode->i_sb;
588
589 iput(inode);
590 nfs_sb_deactive(sb);
591 }
592}
593
f7b422b1
DH		 594/*
595 * Determine the device name as a string
596 */
b514f872 597static inline char *nfs_devname(struct dentry *dentry,
54ceac45 598 char *buffer, ssize_t buflen)
f7b422b1 599{
b514f872 600 char *dummy;
97a54868 601 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
f7b422b1
DH		 602}
603
604/*
605 * Determine the actual block size (and log2 thereof)
606 */
607static inline
608unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
609{
610 /* make sure blocksize is a power of two */
611 if ((bsize & (bsize - 1)) || nrbitsp) {
612 unsigned char nrbits;
613
614 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
615 ;
616 bsize = 1 << nrbits;
617 if (nrbitsp)
618 *nrbitsp = nrbits;
619 }
620
621 return bsize;
622}
623
624/*
625 * Calculate the number of 512byte blocks used.
626 */
9eaa67c6 627static inline blkcnt_t nfs_calc_block_size(u64 tsize)
f7b422b1 628{
9eaa67c6 629 blkcnt_t used = (tsize + 511) >> 9;
f7b422b1
DH		 630 return (used > ULONG_MAX) ? ULONG_MAX : used;
631}
632
633/*
634 * Compute and set NFS server blocksize
635 */
636static inline
637unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
638{
639 if (bsize < NFS_MIN_FILE_IO_SIZE)
640 bsize = NFS_DEF_FILE_IO_SIZE;
641 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
642 bsize = NFS_MAX_FILE_IO_SIZE;
643
644 return nfs_block_bits(bsize, nrbitsp);
645}
646
647/*
648 * Determine the maximum file size for a superblock
649 */
650static inline
651void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
652{
653 sb->s_maxbytes = (loff_t)maxfilesize;
654 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
655 sb->s_maxbytes = MAX_LFS_FILESIZE;
656}
49a70f27 657
d15bc38d
TH		 658/*
659 * Record the page as unstable and mark its inode as dirty.
660 */
661static inline
86d80f97 662void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo)
d15bc38d 663{
86d80f97
TM		 664 if (!cinfo->dreq) {
665 struct inode *inode = page_file_mapping(page)->host;
d15bc38d 666
11fb9989 667 inc_node_page_state(page, NR_UNSTABLE_NFS);
86d80f97
TM		 668 inc_wb_stat(&inode_to_bdi(inode)->wb, WB_RECLAIMABLE);
669 __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
670 }
d15bc38d
TH		 671}
672
49a70f27
TM		 673/*
674 * Determine the number of bytes of data the page contains
675 */
676static inline
677unsigned int nfs_page_length(struct page *page)
678{
d56b4ddf 679 loff_t i_size = i_size_read(page_file_mapping(page)->host);
49a70f27
TM		 680
681 if (i_size > 0) {
d56b4ddf 682 pgoff_t page_index = page_file_index(page);
09cbfeaf 683 pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT;
d56b4ddf 684 if (page_index < end_index)
09cbfeaf 685 return PAGE_SIZE;
d56b4ddf 686 if (page_index == end_index)
09cbfeaf 687 return ((i_size - 1) & ~PAGE_MASK) + 1;
49a70f27
TM		 688 }
689 return 0;
690}
8d5658c9 691
0b26a0bf
TM		 692/*
693 * Convert a umode to a dirent->d_type
694 */
695static inline
696unsigned char nfs_umode_to_dtype(umode_t mode)
697{
698 return (mode >> 12) & 15;
699}
700
8d5658c9
TM		 701/*
702 * Determine the number of pages in an array of length 'len' and
703 * with a base offset of 'base'
704 */
705static inline
706unsigned int nfs_page_array_len(unsigned int base, size_t len)
707{
708 return ((unsigned long)len + (unsigned long)base +
709 PAGE_SIZE - 1) >> PAGE_SHIFT;
710}
0110ee15 711
3a1556e8
TM		 712/*
713 * Convert a struct timespec into a 64-bit change attribute
714 *
715 * This does approximately the same thing as timespec_to_ns(),
716 * but for calculation efficiency, we multiply the seconds by
717 * 1024*1024*1024.
718 */
719static inline
720u64 nfs_timespec_to_change_attr(const struct timespec *ts)
721{
722 return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
723}
1264a2f0
TM		 724
725#ifdef CONFIG_CRC32
726/**
727 * nfs_fhandle_hash - calculate the crc32 hash for the filehandle
728 * @fh - pointer to filehandle
729 *
730 * returns a crc32 hash for the filehandle that is compatible with
731 * the one displayed by "wireshark".
732 */
733static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
734{
735 return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size);
736}
48c9579a
OK		 737static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid)
738{
739 return ~crc32_le(0xFFFFFFFF, &stateid->other[0],
740 NFS4_STATEID_OTHER_SIZE);
741}
1264a2f0
TM		 742#else
743static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
744{
745 return 0;
746}
48c9579a
OK		 747static inline u32 nfs_stateid_hash(nfs4_stateid *stateid)
748{
749 return 0;
750}
1264a2f0 751#endif
0bcbf039
PT		 752
753static inline bool nfs_error_is_fatal(int err)
754{
755 switch (err) {
756 case -ERESTARTSYS:
757 case -EIO:
758 case -ENOSPC:
759 case -EROFS:
760 case -E2BIG:
761 return true;
762 default:
763 return false;
764 }
765}
Linux 6.x block layer and io_uring tree(s)