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SUNRPC: Add the 'softerr' rpc_client flag
[linux-block.git] / fs / nfs / internal.h
CommitLineData
b2441318 1/* SPDX-License-Identifier: GPL-2.0 */
f7b422b1
DH		 2/*
3 * NFS internal definitions
4 */
5
eedc020e 6#include "nfs4_fs.h"
f7b422b1 7#include <linux/mount.h>
f9c3a380 8#include <linux/security.h>
1264a2f0 9#include <linux/crc32.h>
47af81f2 10#include <linux/nfs_page.h>
5dd43ce2 11#include <linux/wait_bit.h>
f7b422b1 12
1751e8a6 13#define NFS_MS_MASK (SB_RDONLY|SB_NOSUID|SB_NODEV|SB_NOEXEC|SB_SYNCHRONOUS)
08734048 14
20fa1902
PT		 15extern const struct export_operations nfs_export_ops;
16
54ceac45 17struct nfs_string;
54ceac45
DH		 18
19/* Maximum number of readahead requests
20 * FIXME: this should really be a sysctl so that users may tune it to suit
21 * their needs. People that do NFS over a slow network, might for
22 * instance want to reduce it to something closer to 1 for improved
23 * interactive response.
24 */
25#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
26
7ebb9315
BS		 27static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr)
28{
29 if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid))
30 fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT;
31}
32
533eb461
AA		 33static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr)
34{
35 if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) ||
36 (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) &&
37 ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0)))
38 return 0;
533eb461
AA		 39 return 1;
40}
41
f7b422b1
DH		 42struct nfs_clone_mount {
43 const struct super_block *sb;
44 const struct dentry *dentry;
45 struct nfs_fh *fh;
46 struct nfs_fattr *fattr;
47 char *hostname;
48 char *mnt_path;
6677d095
CL		 49 struct sockaddr *addr;
50 size_t addrlen;
f7b422b1
DH		 51 rpc_authflavor_t authflavor;
52};
53
a14017db
CL		 54/*
55 * Note: RFC 1813 doesn't limit the number of auth flavors that
56 * a server can return, so make something up.
57 */
58#define NFS_MAX_SECFLAVORS (12)
59
4cfd74fc
CL		 60/*
61 * Value used if the user did not specify a port value.
62 */
63#define NFS_UNSPEC_PORT (-1)
64
a956beda
TM		 65#define NFS_UNSPEC_RETRANS (UINT_MAX)
66#define NFS_UNSPEC_TIMEO (UINT_MAX)
67
56e4ebf8
BS		 68/*
69 * Maximum number of pages that readdir can use for creating
70 * a vmapped array of pages.
71 */
be4c2d47 72#define NFS_MAX_READDIR_PAGES 64
73#define NFS_MAX_READDIR_RAPAGES 8
56e4ebf8 74
fcf10398
BS		 75struct nfs_client_initdata {
76 unsigned long init_flags;
5c6e5b60
TM		 77 const char *hostname; /* Hostname of the server */
78 const struct sockaddr *addr; /* Address of the server */
79 const char *nodename; /* Hostname of the client */
80 const char *ip_addr; /* IP address of the client */
fcf10398 81 size_t addrlen;
ab7017a3 82 struct nfs_subversion *nfs_mod;
fcf10398
BS		 83 int proto;
84 u32 minorversion;
85 struct net *net;
5c6e5b60 86 const struct rpc_timeout *timeparms;
fcf10398
BS		 87};
88
6b18eaa0
TT		 89/*
90 * In-kernel mount arguments
91 */
92struct nfs_parsed_mount_data {
93 int flags;
8cb7f74e
CL		 94 unsigned int rsize, wsize;
95 unsigned int timeo, retrans;
96 unsigned int acregmin, acregmax,
6b18eaa0 97 acdirmin, acdirmax;
8cb7f74e 98 unsigned int namlen;
b797cac7 99 unsigned int options;
6b18eaa0 100 unsigned int bsize;
a3f73c27
WAA		 101 struct nfs_auth_info auth_info;
102 rpc_authflavor_t selected_flavor;
6b18eaa0 103 char *client_address;
764302cc 104 unsigned int version;
3fd5be9e 105 unsigned int minorversion;
08734048 106 char *fscache_uniq;
b72e4f42 107 bool need_mount;
6b18eaa0
TT		 108
109 struct {
4c568017
CL		 110 struct sockaddr_storage address;
111 size_t addrlen;
6b18eaa0 112 char *hostname;
78fa701f 113 u32 version;
4cfd74fc 114 int port;
78fa701f 115 unsigned short protocol;
6b18eaa0
TT		 116 } mount_server;
117
118 struct {
4c568017
CL		 119 struct sockaddr_storage address;
120 size_t addrlen;
6b18eaa0
TT		 121 char *hostname;
122 char *export_path;
4cfd74fc 123 int port;
78fa701f 124 unsigned short protocol;
6b18eaa0 125 } nfs_server;
f9c3a380 126
204cc0cc 127 void *lsm_opts;
e50a7a1a 128 struct net *net;
6b18eaa0
TT		 129};
130
146ec944 131/* mount_clnt.c */
c5d120f8
CL		 132struct nfs_mount_request {
133 struct sockaddr *sap;
134 size_t salen;
135 char *hostname;
136 char *dirpath;
137 u32 version;
138 unsigned short protocol;
139 struct nfs_fh *fh;
50a737f8 140 int noresvport;
8e02f6b9
CL		 141 unsigned int *auth_flav_len;
142 rpc_authflavor_t *auth_flavs;
6d59b8d5 143 struct net *net;
c5d120f8
CL		 144};
145
fbdefd64
BS		 146struct nfs_mount_info {
147 void (*fill_super)(struct super_block *, struct nfs_mount_info *);
148 int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *);
149 struct nfs_parsed_mount_data *parsed;
150 struct nfs_clone_mount *cloned;
151 struct nfs_fh *mntfh;
152};
153
c5d120f8 154extern int nfs_mount(struct nfs_mount_request *info);
0b524123 155extern void nfs_umount(const struct nfs_mount_request *info);
146ec944 156
24c8dbbb 157/* client.c */
a613fa16 158extern const struct rpc_program nfs_program;
6b13168b 159extern void nfs_clients_init(struct net *net);
6663ee7f 160extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *);
5c6e5b60 161int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t);
7d38de3f 162struct nfs_client *nfs_get_client(const struct nfs_client_initdata *);
fcf10398
BS		 163int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *);
164void nfs_server_insert_lists(struct nfs_server *);
32e62b7c 165void nfs_server_remove_lists(struct nfs_server *);
a956beda 166void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans);
fcf10398
BS		 167int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t,
168 rpc_authflavor_t);
169struct nfs_server *nfs_alloc_server(void);
170void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *);
54ceac45 171
28cd1b3f 172extern void nfs_cleanup_cb_ident_idr(struct net *);
24c8dbbb 173extern void nfs_put_client(struct nfs_client *);
cdb7eced 174extern void nfs_free_client(struct nfs_client *);
28cd1b3f 175extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
c36fca52 176extern struct nfs_client *
c7add9a9 177nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
459de2ed 178 struct nfs4_sessionid *, u32);
1179acc6 179extern struct nfs_server *nfs_create_server(struct nfs_mount_info *,
ab7017a3 180 struct nfs_subversion *);
91ea40b9 181extern struct nfs_server *nfs4_create_server(
1179acc6
BS		 182 struct nfs_mount_info *,
183 struct nfs_subversion *);
54ceac45
DH		 184extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *,
185 struct nfs_fh *);
32e62b7c 186extern int nfs4_update_server(struct nfs_server *server, const char *hostname,
292f503c
TM		 187 struct sockaddr *sap, size_t salen,
188 struct net *net);
54ceac45
DH		 189extern void nfs_free_server(struct nfs_server *server);
190extern struct nfs_server *nfs_clone_server(struct nfs_server *,
191 struct nfs_fh *,
7e6eb683
BS		 192 struct nfs_fattr *,
193 rpc_authflavor_t);
a33e4b03
WAA		 194extern bool nfs_client_init_is_complete(const struct nfs_client *clp);
195extern int nfs_client_init_status(const struct nfs_client *clp);
4697bd5e 196extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
76db6d95 197extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
3fc75f12 198extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv,
d83217c1 199 const struct sockaddr *ds_addr,
98fc685a
AA		 200 int ds_addrlen, int ds_proto,
201 unsigned int ds_timeo,
064172f3 202 unsigned int ds_retrans,
7d38de3f 203 u32 minor_version);
0e20162e
AA		 204extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
205 struct inode *);
b224f7cb 206extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv,
1a04c6e1
PT		 207 const struct sockaddr *ds_addr, int ds_addrlen,
208 int ds_proto, unsigned int ds_timeo,
7d38de3f 209 unsigned int ds_retrans);
6aaca566
DH		 210#ifdef CONFIG_PROC_FS
211extern int __init nfs_fs_proc_init(void);
212extern void nfs_fs_proc_exit(void);
65b38851
EB		 213extern int nfs_fs_proc_net_init(struct net *net);
214extern void nfs_fs_proc_net_exit(struct net *net);
6aaca566 215#else
65b38851
EB		 216static inline int nfs_fs_proc_net_init(struct net *net)
217{
218 return 0;
219}
220static inline void nfs_fs_proc_net_exit(struct net *net)
221{
222}
6aaca566
DH		 223static inline int nfs_fs_proc_init(void)
224{
225 return 0;
226}
227static inline void nfs_fs_proc_exit(void)
228{
229}
230#endif
24c8dbbb 231
f7b422b1 232/* callback_xdr.c */
e9679189
CH		 233extern const struct svc_version nfs4_callback_version1;
234extern const struct svc_version nfs4_callback_version4;
f7b422b1 235
4db6e0b7 236struct nfs_pageio_descriptor;
f7b422b1
DH		 237/* pagelist.c */
238extern int __init nfs_init_nfspagecache(void);
266bee88 239extern void nfs_destroy_nfspagecache(void);
f7b422b1 240extern int __init nfs_init_readpagecache(void);
266bee88 241extern void nfs_destroy_readpagecache(void);
f7b422b1 242extern int __init nfs_init_writepagecache(void);
266bee88 243extern void nfs_destroy_writepagecache(void);
f7b422b1 244
f7b422b1 245extern int __init nfs_init_directcache(void);
266bee88 246extern void nfs_destroy_directcache(void);
4db6e0b7
FI		 247extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
248 struct nfs_pgio_header *hdr,
249 void (*release)(struct nfs_pgio_header *hdr));
250void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
210c7c17 251int nfs_iocounter_wait(struct nfs_lock_context *l_ctx);
577b4232 252
41d8d5b7 253extern const struct nfs_pageio_ops nfs_pgio_rw_ops;
1e7f3a48
WAA		 254struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *);
255void nfs_pgio_header_free(struct nfs_pgio_header *);
ef2c488c 256int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *);
46a5ab47 257int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr,
a52458b4 258 const struct cred *cred, const struct nfs_rpc_ops *rpc_ops,
46a5ab47 259 const struct rpc_call_ops *call_ops, int how, int flags);
d4581383 260void nfs_free_request(struct nfs_page *req);
48d635f1
PT		 261struct nfs_pgio_mirror *
262nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc);
00bfa30a 263
47af81f2
PT		 264static inline bool nfs_pgio_has_mirroring(struct nfs_pageio_descriptor *desc)
265{
266 WARN_ON_ONCE(desc->pg_mirror_count < 1);
267 return desc->pg_mirror_count > 1;
268}
269
138a2935
TM		 270static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1,
271 const struct nfs_open_context *ctx2)
272{
a52458b4 273 return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state;
138a2935
TM		 274}
275
f7b422b1 276/* nfs2xdr.c */
499b4988 277extern const struct rpc_procinfo nfs_procedures[];
573c4e1e 278extern int nfs2_decode_dirent(struct xdr_stream *,
a7a3b1e9 279 struct nfs_entry *, bool);
f7b422b1
DH		 280
281/* nfs3xdr.c */
499b4988 282extern const struct rpc_procinfo nfs3_procedures[];
573c4e1e 283extern int nfs3_decode_dirent(struct xdr_stream *,
a7a3b1e9 284 struct nfs_entry *, bool);
f7b422b1
DH		 285
286/* nfs4xdr.c */
89d77c8f 287#if IS_ENABLED(CONFIG_NFS_V4)
573c4e1e 288extern int nfs4_decode_dirent(struct xdr_stream *,
a7a3b1e9 289 struct nfs_entry *, bool);
7d4e2747 290#endif
2449ea2e
AB		 291#ifdef CONFIG_NFS_V4_1
292extern const u32 nfs41_maxread_overhead;
293extern const u32 nfs41_maxwrite_overhead;
f1c097be 294extern const u32 nfs41_maxgetdevinfo_overhead;
2449ea2e 295#endif
f7b422b1
DH		 296
297/* nfs4proc.c */
89d77c8f 298#if IS_ENABLED(CONFIG_NFS_V4)
499b4988 299extern const struct rpc_procinfo nfs4_procedures[];
d75d5414 300#endif
f7b422b1 301
694e096f
AS		 302#ifdef CONFIG_NFS_V4_SECURITY_LABEL
303extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags);
a49c2691
KM		 304static inline struct nfs4_label *
305nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
306{
307 if (!dst || !src)
308 return NULL;
309
310 if (src->len > NFS4_MAXLABELLEN)
311 return NULL;
312
313 dst->lfs = src->lfs;
314 dst->pi = src->pi;
315 dst->len = src->len;
316 memcpy(dst->label, src->label, src->len);
317
318 return dst;
319}
694e096f
AS		 320static inline void nfs4_label_free(struct nfs4_label *label)
321{
322 if (label) {
323 kfree(label->label);
324 kfree(label);
325 }
326 return;
327}
fd1defc2
TM		 328
329static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
330{
331 if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL))
332 nfsi->cache_validity |= NFS_INO_INVALID_LABEL;
333}
694e096f
AS		 334#else
335static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; }
336static inline void nfs4_label_free(void *label) {}
fd1defc2
TM		 337static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
338{
339}
a49c2691
KM		 340static inline struct nfs4_label *
341nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
342{
343 return NULL;
344}
694e096f
AS		 345#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
346
7fe5c398
TM		 347/* proc.c */
348void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
8cab4c39 349extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
5c6e5b60 350 const struct nfs_client_initdata *);
7fe5c398 351
979df72e 352/* dir.c */
1bcf4c5c 353extern void nfs_advise_use_readdirplus(struct inode *dir);
311324ad 354extern void nfs_force_use_readdirplus(struct inode *dir);
1ab6c499
DC		 355extern unsigned long nfs_access_cache_count(struct shrinker *shrink,
356 struct shrink_control *sc);
357extern unsigned long nfs_access_cache_scan(struct shrinker *shrink,
358 struct shrink_control *sc);
597d9289
BS		 359struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
360int nfs_create(struct inode *, struct dentry *, umode_t, bool);
361int nfs_mkdir(struct inode *, struct dentry *, umode_t);
362int nfs_rmdir(struct inode *, struct dentry *);
363int nfs_unlink(struct inode *, struct dentry *);
364int nfs_symlink(struct inode *, struct dentry *, const char *);
365int nfs_link(struct dentry *, struct inode *, struct dentry *);
366int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
1cd66c93
MS		 367int nfs_rename(struct inode *, struct dentry *,
368 struct inode *, struct dentry *, unsigned int);
979df72e 369
ce4ef7c0 370/* file.c */
4ff79bc7 371int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync);
ce4ef7c0 372loff_t nfs_file_llseek(struct file *, loff_t, int);
3aa2d199 373ssize_t nfs_file_read(struct kiocb *, struct iov_iter *);
ce4ef7c0 374int nfs_file_mmap(struct file *, struct vm_area_struct *);
edaf4369 375ssize_t nfs_file_write(struct kiocb *, struct iov_iter *);
ce4ef7c0
BS		 376int nfs_file_release(struct inode *, struct file *);
377int nfs_lock(struct file *, int, struct file_lock *);
378int nfs_flock(struct file *, int, struct file_lock *);
ce4ef7c0 379int nfs_check_flags(int);
ce4ef7c0 380
f7b422b1 381/* inode.c */
5746006f 382extern struct workqueue_struct *nfsiod_workqueue;
f7b422b1
DH		 383extern struct inode *nfs_alloc_inode(struct super_block *sb);
384extern void nfs_destroy_inode(struct inode *);
a9185b41 385extern int nfs_write_inode(struct inode *, struct writeback_control *);
eed99357 386extern int nfs_drop_inode(struct inode *);
19d87ca3 387extern void nfs_clear_inode(struct inode *);
b57922d9 388extern void nfs_evict_inode(struct inode *);
f41f7418 389void nfs_zap_acl_cache(struct inode *inode);
61540bf6 390extern bool nfs_check_cache_invalid(struct inode *, unsigned long);
dfd01f02 391extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode);
5e4def20 392extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode);
f7b422b1
DH		 393
394/* super.c */
6a74490d 395extern const struct super_operations nfs_sops;
ab7017a3 396extern struct file_system_type nfs_fs_type;
54ceac45 397extern struct file_system_type nfs_xdev_fs_type;
89d77c8f 398#if IS_ENABLED(CONFIG_NFS_V4)
54ceac45 399extern struct file_system_type nfs4_referral_fs_type;
f7b422b1 400#endif
4d4b69dd 401bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t);
ff9099f2
BS		 402struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *,
403 struct nfs_subversion *);
fbdefd64
BS		 404int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
405int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
ab7017a3
BS		 406struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *,
407 struct nfs_mount_info *, struct nfs_subversion *);
fbdefd64
BS		 408struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *);
409struct dentry * nfs_xdev_mount_common(struct file_system_type *, int,
410 const char *, struct nfs_mount_info *);
411void nfs_kill_super(struct super_block *);
412void nfs_fill_super(struct super_block *, struct nfs_mount_info *);
4ebd9ab3 413
f7b422b1 414extern struct rpc_stat nfs_rpcstat;
4ebd9ab3 415
f7b422b1
DH		 416extern int __init register_nfs_fs(void);
417extern void __exit unregister_nfs_fs(void);
ea7c38fe 418extern bool nfs_sb_active(struct super_block *sb);
1daef0a8 419extern void nfs_sb_deactive(struct super_block *sb);
f7b422b1 420
a5864c99
TM		 421/* io.c */
422extern void nfs_start_io_read(struct inode *inode);
423extern void nfs_end_io_read(struct inode *inode);
424extern void nfs_start_io_write(struct inode *inode);
425extern void nfs_end_io_write(struct inode *inode);
426extern void nfs_start_io_direct(struct inode *inode);
427extern void nfs_end_io_direct(struct inode *inode);
428
651b0e70
TM		 429static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi)
430{
431 return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0;
432}
433
f7b422b1 434/* namespace.c */
97a54868 435#define NFS_PATH_CANONICAL 1
b514f872 436extern char *nfs_path(char **p, struct dentry *dentry,
97a54868 437 char *buffer, ssize_t buflen, unsigned flags);
36d43a43 438extern struct vfsmount *nfs_d_automount(struct path *path);
281cad46
BS		 439struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *,
440 struct nfs_fh *, struct nfs_fattr *);
441struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *,
442 struct nfs_fattr *, rpc_authflavor_t);
f7b422b1 443
54ceac45 444/* getroot.c */
0d5839ad
AV		 445extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *,
446 const char *);
89d77c8f 447#if IS_ENABLED(CONFIG_NFS_V4)
0d5839ad
AV		 448extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *,
449 const char *);
54ceac45 450
5e6b1990 451extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool);
7d4e2747 452#endif
f7b422b1 453
061ae2ed 454struct nfs_pgio_completion_ops;
f11c88af 455/* read.c */
584aa810 456extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
fab5fc25 457 struct inode *inode, bool force_mds,
584aa810 458 const struct nfs_pgio_completion_ops *compl_ops);
f11c88af 459extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
493292dd 460extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
e885de1a 461
fbdefd64 462/* super.c */
fbdefd64
BS		 463void nfs_umount_begin(struct super_block *);
464int nfs_statfs(struct dentry *, struct kstatfs *);
465int nfs_show_options(struct seq_file *, struct dentry *);
466int nfs_show_devname(struct seq_file *, struct dentry *);
467int nfs_show_path(struct seq_file *, struct dentry *);
468int nfs_show_stats(struct seq_file *, struct dentry *);
fbdefd64
BS		 469int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
470
def6ed7e 471/* write.c */
1763da12 472extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
a20c93e3 473 struct inode *inode, int ioflags, bool force_mds,
1763da12 474 const struct nfs_pgio_completion_ops *compl_ops);
dce81290 475extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
0b7c0153 476extern void nfs_commit_free(struct nfs_commit_data *p);
def6ed7e 477extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
0b7c0153
FI		 478extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
479extern int nfs_initiate_commit(struct rpc_clnt *clnt,
480 struct nfs_commit_data *data,
c36aae9a 481 const struct nfs_rpc_ops *nfs_ops,
e0c2b380 482 const struct rpc_call_ops *call_ops,
9f0ec176 483 int how, int flags);
0b7c0153 484extern void nfs_init_commit(struct nfs_commit_data *data,
e0c2b380 485 struct list_head *head,
f453a54a
FI		 486 struct pnfs_layout_segment *lseg,
487 struct nfs_commit_info *cinfo);
1763da12
FI		 488int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
489 struct nfs_commit_info *cinfo, int max);
ce59515c 490unsigned long nfs_reqs_to_commit(struct nfs_commit_info *);
1763da12
FI		 491int nfs_scan_commit(struct inode *inode, struct list_head *dst,
492 struct nfs_commit_info *cinfo);
493void nfs_mark_request_commit(struct nfs_page *req,
494 struct pnfs_layout_segment *lseg,
b57ff130
WAA		 495 struct nfs_commit_info *cinfo,
496 u32 ds_commit_idx);
c65e6254 497int nfs_write_need_commit(struct nfs_pgio_header *);
a08a8cd3 498void nfs_writeback_update_inode(struct nfs_pgio_header *hdr);
1763da12
FI		 499int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
500 int how, struct nfs_commit_info *cinfo);
e0c2b380 501void nfs_retry_commit(struct list_head *page_list,
ea2cf228 502 struct pnfs_layout_segment *lseg,
b57ff130
WAA		 503 struct nfs_commit_info *cinfo,
504 u32 ds_commit_idx);
0b7c0153 505void nfs_commitdata_release(struct nfs_commit_data *data);
6272dcc6 506void nfs_request_add_commit_list(struct nfs_page *req,
ea2cf228 507 struct nfs_commit_info *cinfo);
86d80f97
TM		 508void nfs_request_add_commit_list_locked(struct nfs_page *req,
509 struct list_head *dst,
510 struct nfs_commit_info *cinfo);
ea2cf228
FI		 511void nfs_request_remove_commit_list(struct nfs_page *req,
512 struct nfs_commit_info *cinfo);
513void nfs_init_cinfo(struct nfs_commit_info *cinfo,
514 struct inode *inode,
515 struct nfs_direct_req *dreq);
dc24826b 516int nfs_key_timeout_notify(struct file *filp, struct inode *inode);
ce52914e 517bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode);
a7d42ddb 518void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio);
e0c2b380 519
837bb1d7
TM		 520int nfs_filemap_write_and_wait_range(struct address_space *mapping,
521 loff_t lstart, loff_t lend);
522
a5314a74
TM		 523#ifdef CONFIG_NFS_V4_1
524static inline
525void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
526{
527 int i;
528
529 for (i = 0; i < cinfo->nbuckets; i++)
530 cinfo->buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW;
531}
532#else
533static inline
534void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
535{
536}
537#endif
538
074cc1de
TM		 539#ifdef CONFIG_MIGRATION
540extern int nfs_migrate_page(struct address_space *,
a6bc32b8 541 struct page *, struct page *, enum migrate_mode);
074cc1de 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 */
8cab4c39 564extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
5c6e5b60 565 const struct nfs_client_initdata *);
05f4c350
CL		 566extern int nfs40_walk_client_list(struct nfs_client *clp,
567 struct nfs_client **result,
a52458b4 568 const struct cred *cred);
05f4c350
CL		 569extern int nfs41_walk_client_list(struct nfs_client *clp,
570 struct nfs_client **result,
a52458b4 571 const struct cred *cred);
10e037d1
S		 572extern void nfs4_test_session_trunk(struct rpc_clnt *clnt,
573 struct rpc_xprt *xprt,
574 void *data);
cccef3b9 575
ea7c38fe
TM		 576static inline struct inode *nfs_igrab_and_active(struct inode *inode)
577{
578 inode = igrab(inode);
579 if (inode != NULL && !nfs_sb_active(inode->i_sb)) {
580 iput(inode);
581 inode = NULL;
582 }
583 return inode;
584}
585
586static inline void nfs_iput_and_deactive(struct inode *inode)
587{
588 if (inode != NULL) {
589 struct super_block *sb = inode->i_sb;
590
591 iput(inode);
592 nfs_sb_deactive(sb);
593 }
594}
595
f7b422b1
DH		 596/*
597 * Determine the device name as a string
598 */
b514f872 599static inline char *nfs_devname(struct dentry *dentry,
54ceac45 600 char *buffer, ssize_t buflen)
f7b422b1 601{
b514f872 602 char *dummy;
97a54868 603 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
f7b422b1
DH		 604}
605
606/*
607 * Determine the actual block size (and log2 thereof)
608 */
609static inline
610unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
611{
612 /* make sure blocksize is a power of two */
613 if ((bsize & (bsize - 1)) || nrbitsp) {
614 unsigned char nrbits;
615
616 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
617 ;
618 bsize = 1 << nrbits;
619 if (nrbitsp)
620 *nrbitsp = nrbits;
621 }
622
623 return bsize;
624}
625
626/*
627 * Calculate the number of 512byte blocks used.
628 */
9eaa67c6 629static inline blkcnt_t nfs_calc_block_size(u64 tsize)
f7b422b1 630{
9eaa67c6 631 blkcnt_t used = (tsize + 511) >> 9;
f7b422b1
DH		 632 return (used > ULONG_MAX) ? ULONG_MAX : used;
633}
634
635/*
636 * Compute and set NFS server blocksize
637 */
638static inline
639unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
640{
641 if (bsize < NFS_MIN_FILE_IO_SIZE)
642 bsize = NFS_DEF_FILE_IO_SIZE;
643 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
644 bsize = NFS_MAX_FILE_IO_SIZE;
645
646 return nfs_block_bits(bsize, nrbitsp);
647}
648
649/*
650 * Determine the maximum file size for a superblock
651 */
652static inline
653void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
654{
655 sb->s_maxbytes = (loff_t)maxfilesize;
656 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
657 sb->s_maxbytes = MAX_LFS_FILESIZE;
658}
49a70f27 659
d15bc38d
TH		 660/*
661 * Record the page as unstable and mark its inode as dirty.
662 */
663static inline
86d80f97 664void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo)
d15bc38d 665{
86d80f97
TM		 666 if (!cinfo->dreq) {
667 struct inode *inode = page_file_mapping(page)->host;
d15bc38d 668
11fb9989 669 inc_node_page_state(page, NR_UNSTABLE_NFS);
86d80f97
TM		 670 inc_wb_stat(&inode_to_bdi(inode)->wb, WB_RECLAIMABLE);
671 __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
672 }
d15bc38d
TH		 673}
674
49a70f27
TM		 675/*
676 * Determine the number of bytes of data the page contains
677 */
678static inline
679unsigned int nfs_page_length(struct page *page)
680{
d56b4ddf 681 loff_t i_size = i_size_read(page_file_mapping(page)->host);
49a70f27
TM		 682
683 if (i_size > 0) {
8cd79788 684 pgoff_t index = page_index(page);
09cbfeaf 685 pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT;
8cd79788 686 if (index < end_index)
09cbfeaf 687 return PAGE_SIZE;
8cd79788 688 if (index == end_index)
09cbfeaf 689 return ((i_size - 1) & ~PAGE_MASK) + 1;
49a70f27
TM		 690 }
691 return 0;
692}
8d5658c9 693
0b26a0bf
TM		 694/*
695 * Convert a umode to a dirent->d_type
696 */
697static inline
698unsigned char nfs_umode_to_dtype(umode_t mode)
699{
700 return (mode >> 12) & 15;
701}
702
8d5658c9
TM		 703/*
704 * Determine the number of pages in an array of length 'len' and
705 * with a base offset of 'base'
706 */
707static inline
708unsigned int nfs_page_array_len(unsigned int base, size_t len)
709{
710 return ((unsigned long)len + (unsigned long)base +
711 PAGE_SIZE - 1) >> PAGE_SHIFT;
712}
0110ee15 713
3a1556e8
TM		 714/*
715 * Convert a struct timespec into a 64-bit change attribute
716 *
717 * This does approximately the same thing as timespec_to_ns(),
718 * but for calculation efficiency, we multiply the seconds by
719 * 1024*1024*1024.
720 */
721static inline
722u64 nfs_timespec_to_change_attr(const struct timespec *ts)
723{
724 return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
725}
1264a2f0
TM		 726
727#ifdef CONFIG_CRC32
728/**
729 * nfs_fhandle_hash - calculate the crc32 hash for the filehandle
730 * @fh - pointer to filehandle
731 *
732 * returns a crc32 hash for the filehandle that is compatible with
733 * the one displayed by "wireshark".
734 */
735static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
736{
737 return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size);
738}
48c9579a
OK		 739static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid)
740{
741 return ~crc32_le(0xFFFFFFFF, &stateid->other[0],
742 NFS4_STATEID_OTHER_SIZE);
743}
1264a2f0
TM		 744#else
745static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
746{
747 return 0;
748}
48c9579a
OK		 749static inline u32 nfs_stateid_hash(nfs4_stateid *stateid)
750{
751 return 0;
752}
1264a2f0 753#endif
0bcbf039
PT		 754
755static inline bool nfs_error_is_fatal(int err)
756{
757 switch (err) {
758 case -ERESTARTSYS:
7dc58ca5 759 case -EINTR:
54551d85
TM		 760 case -EACCES:
761 case -EDQUOT:
762 case -EFBIG:
0bcbf039
PT		 763 case -EIO:
764 case -ENOSPC:
765 case -EROFS:
54551d85 766 case -ESTALE:
0bcbf039 767 case -E2BIG:
2dc23aff 768 case -ENOMEM:
0bcbf039
PT		 769 return true;
770 default:
771 return false;
772 }
773}
bf4b4905
N		 774
775static inline void nfs_context_set_write_error(struct nfs_open_context *ctx, int error)
776{
777 ctx->error = error;
778 smp_wmb();
779 set_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags);
780}
Linux 6.x block layer and io_uring tree(s)