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Merge tag 'dmaengine-fix-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul...
[linux-2.6-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"
f2aedb71 7#include <linux/fs_context.h>
f9c3a380 8#include <linux/security.h>
1264a2f0 9#include <linux/crc32.h>
9954bf92 10#include <linux/sunrpc/addr.h>
47af81f2 11#include <linux/nfs_page.h>
5dd43ce2 12#include <linux/wait_bit.h>
f7b422b1 13
62a55d08 14#define NFS_SB_MASK (SB_RDONLY|SB_NOSUID|SB_NODEV|SB_NOEXEC|SB_SYNCHRONOUS)
08734048 15
20fa1902
PT		 16extern const struct export_operations nfs_export_ops;
17
54ceac45 18struct nfs_string;
f2aedb71 19struct nfs_pageio_descriptor;
54ceac45 20
7ebb9315
BS		 21static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr)
22{
23 if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid))
24 fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT;
25}
26
533eb461
AA		 27static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr)
28{
29 if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) ||
30 (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) &&
31 ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0)))
32 return 0;
533eb461
AA		 33 return 1;
34}
35
f7b37b8b
TM		 36static inline bool nfs_lookup_is_soft_revalidate(const struct dentry *dentry)
37{
38 if (!(NFS_SB(dentry->d_sb)->flags & NFS_MOUNT_SOFTREVAL))
39 return false;
40 if (!d_is_positive(dentry) || !NFS_FH(d_inode(dentry))->size)
41 return false;
42 return true;
43}
44
a14017db
CL		 45/*
46 * Note: RFC 1813 doesn't limit the number of auth flavors that
47 * a server can return, so make something up.
48 */
49#define NFS_MAX_SECFLAVORS (12)
50
4cfd74fc
CL		 51/*
52 * Value used if the user did not specify a port value.
53 */
54#define NFS_UNSPEC_PORT (-1)
55
a956beda
TM		 56#define NFS_UNSPEC_RETRANS (UINT_MAX)
57#define NFS_UNSPEC_TIMEO (UINT_MAX)
58
fcf10398
BS		 59struct nfs_client_initdata {
60 unsigned long init_flags;
5c6e5b60
TM		 61 const char *hostname; /* Hostname of the server */
62 const struct sockaddr *addr; /* Address of the server */
63 const char *nodename; /* Hostname of the client */
64 const char *ip_addr; /* IP address of the client */
fcf10398 65 size_t addrlen;
ab7017a3 66 struct nfs_subversion *nfs_mod;
fcf10398
BS		 67 int proto;
68 u32 minorversion;
6619079d 69 unsigned int nconnect;
fcf10398 70 struct net *net;
5c6e5b60 71 const struct rpc_timeout *timeparms;
1a58e8a0 72 const struct cred *cred;
fcf10398
BS		 73};
74
6b18eaa0
TT		 75/*
76 * In-kernel mount arguments
77 */
5eb005ca 78struct nfs_fs_context {
f2aedb71
DH		 79 bool internal;
80 bool skip_reconfig_option_check;
81 bool need_mount;
82 bool sloppy;
e558100f 83 unsigned int flags; /* NFS{,4}_MOUNT_* flags */
8cb7f74e
CL		 84 unsigned int rsize, wsize;
85 unsigned int timeo, retrans;
e558100f
DH		 86 unsigned int acregmin, acregmax;
87 unsigned int acdirmin, acdirmax;
8cb7f74e 88 unsigned int namlen;
b797cac7 89 unsigned int options;
6b18eaa0 90 unsigned int bsize;
a3f73c27
WAA		 91 struct nfs_auth_info auth_info;
92 rpc_authflavor_t selected_flavor;
6b18eaa0 93 char *client_address;
764302cc 94 unsigned int version;
3fd5be9e 95 unsigned int minorversion;
08734048 96 char *fscache_uniq;
f8ee01e3
DH		 97 unsigned short protofamily;
98 unsigned short mountfamily;
ec1ade6a 99 bool has_sec_mnt_opts;
6b18eaa0
TT		 100
101 struct {
e558100f
DH		 102 union {
103 struct sockaddr address;
104 struct sockaddr_storage _address;
105 };
4c568017 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 {
e558100f
DH		 114 union {
115 struct sockaddr address;
116 struct sockaddr_storage _address;
117 };
4c568017 118 size_t addrlen;
6b18eaa0
TT		 119 char *hostname;
120 char *export_path;
4cfd74fc 121 int port;
78fa701f 122 unsigned short protocol;
28cc5cd8 123 unsigned short nconnect;
f2aedb71 124 unsigned short export_path_len;
6b18eaa0 125 } nfs_server;
f9c3a380 126
62a55d08
SM		 127 struct nfs_fh *mntfh;
128 struct nfs_server *server;
129 struct nfs_subversion *nfs_mod;
130
131 /* Information for a cloned mount. */
132 struct nfs_clone_mount {
133 struct super_block *sb;
134 struct dentry *dentry;
135 struct nfs_fattr *fattr;
136 unsigned int inherited_bsize;
137 } clone_data;
6b18eaa0
TT		 138};
139
c98e9daa
SM		 140#define nfs_errorf(fc, fmt, ...) ((fc)->log.log ? \
141 errorf(fc, fmt, ## __VA_ARGS__) : \
142 ({ dprintk(fmt "\n", ## __VA_ARGS__); }))
143
144#define nfs_ferrorf(fc, fac, fmt, ...) ((fc)->log.log ? \
145 errorf(fc, fmt, ## __VA_ARGS__) : \
146 ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); }))
147
148#define nfs_invalf(fc, fmt, ...) ((fc)->log.log ? \
149 invalf(fc, fmt, ## __VA_ARGS__) : \
150 ({ dprintk(fmt "\n", ## __VA_ARGS__); -EINVAL; }))
151
152#define nfs_finvalf(fc, fac, fmt, ...) ((fc)->log.log ? \
153 invalf(fc, fmt, ## __VA_ARGS__) : \
154 ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); -EINVAL; }))
155
156#define nfs_warnf(fc, fmt, ...) ((fc)->log.log ? \
157 warnf(fc, fmt, ## __VA_ARGS__) : \
158 ({ dprintk(fmt "\n", ## __VA_ARGS__); }))
159
160#define nfs_fwarnf(fc, fac, fmt, ...) ((fc)->log.log ? \
161 warnf(fc, fmt, ## __VA_ARGS__) : \
162 ({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); }))
ce8866f0 163
f2aedb71
DH		 164static inline struct nfs_fs_context *nfs_fc2context(const struct fs_context *fc)
165{
166 return fc->fs_private;
167}
168
146ec944 169/* mount_clnt.c */
c5d120f8
CL		 170struct nfs_mount_request {
171 struct sockaddr *sap;
172 size_t salen;
173 char *hostname;
174 char *dirpath;
175 u32 version;
176 unsigned short protocol;
177 struct nfs_fh *fh;
50a737f8 178 int noresvport;
8e02f6b9
CL		 179 unsigned int *auth_flav_len;
180 rpc_authflavor_t *auth_flavs;
6d59b8d5 181 struct net *net;
c5d120f8
CL		 182};
183
c9301cb3 184extern int nfs_mount(struct nfs_mount_request *info, int timeo, int retrans);
0b524123 185extern void nfs_umount(const struct nfs_mount_request *info);
146ec944 186
24c8dbbb 187/* client.c */
a613fa16 188extern const struct rpc_program nfs_program;
6b13168b 189extern void nfs_clients_init(struct net *net);
10b7a70c 190extern void nfs_clients_exit(struct net *net);
6663ee7f 191extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *);
5c6e5b60 192int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t);
7d38de3f 193struct nfs_client *nfs_get_client(const struct nfs_client_initdata *);
fcf10398
BS		 194int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *);
195void nfs_server_insert_lists(struct nfs_server *);
32e62b7c 196void nfs_server_remove_lists(struct nfs_server *);
a956beda 197void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans);
fcf10398
BS		 198int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t,
199 rpc_authflavor_t);
200struct nfs_server *nfs_alloc_server(void);
201void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *);
54ceac45 202
24c8dbbb 203extern void nfs_put_client(struct nfs_client *);
cdb7eced 204extern void nfs_free_client(struct nfs_client *);
28cd1b3f 205extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
c36fca52 206extern struct nfs_client *
c7add9a9 207nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
459de2ed 208 struct nfs4_sessionid *, u32);
62a55d08
SM		 209extern struct nfs_server *nfs_create_server(struct fs_context *);
210extern struct nfs_server *nfs4_create_server(struct fs_context *);
211extern struct nfs_server *nfs4_create_referral_server(struct fs_context *);
32e62b7c 212extern int nfs4_update_server(struct nfs_server *server, const char *hostname,
292f503c
TM		 213 struct sockaddr *sap, size_t salen,
214 struct net *net);
54ceac45
DH		 215extern void nfs_free_server(struct nfs_server *server);
216extern struct nfs_server *nfs_clone_server(struct nfs_server *,
217 struct nfs_fh *,
7e6eb683
BS		 218 struct nfs_fattr *,
219 rpc_authflavor_t);
a33e4b03
WAA		 220extern bool nfs_client_init_is_complete(const struct nfs_client *clp);
221extern int nfs_client_init_status(const struct nfs_client *clp);
4697bd5e 222extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
76db6d95 223extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
3fc75f12 224extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv,
d83217c1 225 const struct sockaddr *ds_addr,
98fc685a
AA		 226 int ds_addrlen, int ds_proto,
227 unsigned int ds_timeo,
064172f3 228 unsigned int ds_retrans,
7d38de3f 229 u32 minor_version);
0e20162e
AA		 230extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
231 struct inode *);
b224f7cb 232extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv,
1a04c6e1
PT		 233 const struct sockaddr *ds_addr, int ds_addrlen,
234 int ds_proto, unsigned int ds_timeo,
7d38de3f 235 unsigned int ds_retrans);
6aaca566
DH		 236#ifdef CONFIG_PROC_FS
237extern int __init nfs_fs_proc_init(void);
238extern void nfs_fs_proc_exit(void);
65b38851
EB		 239extern int nfs_fs_proc_net_init(struct net *net);
240extern void nfs_fs_proc_net_exit(struct net *net);
6aaca566 241#else
65b38851
EB		 242static inline int nfs_fs_proc_net_init(struct net *net)
243{
244 return 0;
245}
246static inline void nfs_fs_proc_net_exit(struct net *net)
247{
248}
6aaca566
DH		 249static inline int nfs_fs_proc_init(void)
250{
251 return 0;
252}
253static inline void nfs_fs_proc_exit(void)
254{
255}
256#endif
24c8dbbb 257
f7b422b1 258/* callback_xdr.c */
e9679189
CH		 259extern const struct svc_version nfs4_callback_version1;
260extern const struct svc_version nfs4_callback_version4;
f7b422b1 261
f2aedb71
DH		 262/* fs_context.c */
263extern struct file_system_type nfs_fs_type;
9954bf92 264
f7b422b1
DH		 265/* pagelist.c */
266extern int __init nfs_init_nfspagecache(void);
266bee88 267extern void nfs_destroy_nfspagecache(void);
f7b422b1 268extern int __init nfs_init_readpagecache(void);
266bee88 269extern void nfs_destroy_readpagecache(void);
f7b422b1 270extern int __init nfs_init_writepagecache(void);
266bee88 271extern void nfs_destroy_writepagecache(void);
f7b422b1 272
f7b422b1 273extern int __init nfs_init_directcache(void);
266bee88 274extern void nfs_destroy_directcache(void);
4db6e0b7
FI		 275extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
276 struct nfs_pgio_header *hdr,
277 void (*release)(struct nfs_pgio_header *hdr));
278void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
210c7c17 279int nfs_iocounter_wait(struct nfs_lock_context *l_ctx);
577b4232 280
41d8d5b7 281extern const struct nfs_pageio_ops nfs_pgio_rw_ops;
1e7f3a48
WAA		 282struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *);
283void nfs_pgio_header_free(struct nfs_pgio_header *);
ef2c488c 284int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *);
46a5ab47 285int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr,
a52458b4 286 const struct cred *cred, const struct nfs_rpc_ops *rpc_ops,
46a5ab47 287 const struct rpc_call_ops *call_ops, int how, int flags);
d4581383 288void nfs_free_request(struct nfs_page *req);
48d635f1
PT		 289struct nfs_pgio_mirror *
290nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc);
00bfa30a 291
138a2935
TM		 292static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1,
293 const struct nfs_open_context *ctx2)
294{
a52458b4 295 return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state;
138a2935
TM		 296}
297
f7b422b1 298/* nfs2xdr.c */
499b4988 299extern const struct rpc_procinfo nfs_procedures[];
573c4e1e 300extern int nfs2_decode_dirent(struct xdr_stream *,
a7a3b1e9 301 struct nfs_entry *, bool);
f7b422b1
DH		 302
303/* nfs3xdr.c */
499b4988 304extern const struct rpc_procinfo nfs3_procedures[];
573c4e1e 305extern int nfs3_decode_dirent(struct xdr_stream *,
a7a3b1e9 306 struct nfs_entry *, bool);
f7b422b1
DH		 307
308/* nfs4xdr.c */
89d77c8f 309#if IS_ENABLED(CONFIG_NFS_V4)
573c4e1e 310extern int nfs4_decode_dirent(struct xdr_stream *,
a7a3b1e9 311 struct nfs_entry *, bool);
7d4e2747 312#endif
2449ea2e
AB		 313#ifdef CONFIG_NFS_V4_1
314extern const u32 nfs41_maxread_overhead;
315extern const u32 nfs41_maxwrite_overhead;
f1c097be 316extern const u32 nfs41_maxgetdevinfo_overhead;
2449ea2e 317#endif
f7b422b1
DH		 318
319/* nfs4proc.c */
89d77c8f 320#if IS_ENABLED(CONFIG_NFS_V4)
499b4988 321extern const struct rpc_procinfo nfs4_procedures[];
d75d5414 322#endif
f7b422b1 323
694e096f
AS		 324#ifdef CONFIG_NFS_V4_SECURITY_LABEL
325extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags);
a49c2691
KM		 326static inline struct nfs4_label *
327nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
328{
329 if (!dst || !src)
330 return NULL;
331
332 if (src->len > NFS4_MAXLABELLEN)
333 return NULL;
334
335 dst->lfs = src->lfs;
336 dst->pi = src->pi;
337 dst->len = src->len;
338 memcpy(dst->label, src->label, src->len);
339
340 return dst;
341}
694e096f
AS		 342static inline void nfs4_label_free(struct nfs4_label *label)
343{
344 if (label) {
345 kfree(label->label);
346 kfree(label);
347 }
348 return;
349}
fd1defc2
TM		 350
351static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
352{
353 if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL))
354 nfsi->cache_validity |= NFS_INO_INVALID_LABEL;
355}
694e096f
AS		 356#else
357static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; }
358static inline void nfs4_label_free(void *label) {}
fd1defc2
TM		 359static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
360{
361}
a49c2691
KM		 362static inline struct nfs4_label *
363nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
364{
365 return NULL;
366}
694e096f
AS		 367#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
368
7fe5c398
TM		 369/* proc.c */
370void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
8cab4c39 371extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
5c6e5b60 372 const struct nfs_client_initdata *);
7fe5c398 373
979df72e 374/* dir.c */
1bcf4c5c 375extern void nfs_advise_use_readdirplus(struct inode *dir);
311324ad 376extern void nfs_force_use_readdirplus(struct inode *dir);
1ab6c499
DC		 377extern unsigned long nfs_access_cache_count(struct shrinker *shrink,
378 struct shrink_control *sc);
379extern unsigned long nfs_access_cache_scan(struct shrinker *shrink,
380 struct shrink_control *sc);
597d9289 381struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
549c7297
CB		 382int nfs_create(struct user_namespace *, struct inode *, struct dentry *,
383 umode_t, bool);
384int nfs_mkdir(struct user_namespace *, struct inode *, struct dentry *,
385 umode_t);
597d9289
BS		 386int nfs_rmdir(struct inode *, struct dentry *);
387int nfs_unlink(struct inode *, struct dentry *);
549c7297
CB		 388int nfs_symlink(struct user_namespace *, struct inode *, struct dentry *,
389 const char *);
597d9289 390int nfs_link(struct dentry *, struct inode *, struct dentry *);
549c7297
CB		 391int nfs_mknod(struct user_namespace *, struct inode *, struct dentry *, umode_t,
392 dev_t);
393int nfs_rename(struct user_namespace *, struct inode *, struct dentry *,
1cd66c93 394 struct inode *, struct dentry *, unsigned int);
979df72e 395
ce4ef7c0 396/* file.c */
4ff79bc7 397int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync);
ce4ef7c0 398loff_t nfs_file_llseek(struct file *, loff_t, int);
3aa2d199 399ssize_t nfs_file_read(struct kiocb *, struct iov_iter *);
ce4ef7c0 400int nfs_file_mmap(struct file *, struct vm_area_struct *);
edaf4369 401ssize_t nfs_file_write(struct kiocb *, struct iov_iter *);
ce4ef7c0
BS		 402int nfs_file_release(struct inode *, struct file *);
403int nfs_lock(struct file *, int, struct file_lock *);
404int nfs_flock(struct file *, int, struct file_lock *);
ce4ef7c0 405int nfs_check_flags(int);
ce4ef7c0 406
f7b422b1 407/* inode.c */
5746006f 408extern struct workqueue_struct *nfsiod_workqueue;
f7b422b1 409extern struct inode *nfs_alloc_inode(struct super_block *sb);
ca1a199e 410extern void nfs_free_inode(struct inode *);
a9185b41 411extern int nfs_write_inode(struct inode *, struct writeback_control *);
eed99357 412extern int nfs_drop_inode(struct inode *);
19d87ca3 413extern void nfs_clear_inode(struct inode *);
b57922d9 414extern void nfs_evict_inode(struct inode *);
fd6d3fee
TM		 415extern void nfs_zap_acl_cache(struct inode *inode);
416extern void nfs_set_cache_invalid(struct inode *inode, unsigned long flags);
61540bf6 417extern bool nfs_check_cache_invalid(struct inode *, unsigned long);
dfd01f02 418extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode);
5e4def20 419extern int nfs_wait_atomic_killable(atomic_t *p, unsigned int mode);
f7b422b1
DH		 420
421/* super.c */
6a74490d 422extern const struct super_operations nfs_sops;
4d4b69dd 423bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t);
f2aedb71
DH		 424int nfs_try_get_tree(struct fs_context *);
425int nfs_get_tree_common(struct fs_context *);
fbdefd64 426void nfs_kill_super(struct super_block *);
4ebd9ab3 427
f7b422b1 428extern struct rpc_stat nfs_rpcstat;
4ebd9ab3 429
f7b422b1
DH		 430extern int __init register_nfs_fs(void);
431extern void __exit unregister_nfs_fs(void);
ea7c38fe 432extern bool nfs_sb_active(struct super_block *sb);
1daef0a8 433extern void nfs_sb_deactive(struct super_block *sb);
3c9e502b
TM		 434extern int nfs_client_for_each_server(struct nfs_client *clp,
435 int (*fn)(struct nfs_server *, void *),
436 void *data);
a5864c99
TM		 437/* io.c */
438extern void nfs_start_io_read(struct inode *inode);
439extern void nfs_end_io_read(struct inode *inode);
440extern void nfs_start_io_write(struct inode *inode);
441extern void nfs_end_io_write(struct inode *inode);
442extern void nfs_start_io_direct(struct inode *inode);
443extern void nfs_end_io_direct(struct inode *inode);
444
651b0e70
TM		 445static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi)
446{
447 return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0;
448}
449
f7b422b1 450/* namespace.c */
97a54868 451#define NFS_PATH_CANONICAL 1
b514f872 452extern char *nfs_path(char **p, struct dentry *dentry,
97a54868 453 char *buffer, ssize_t buflen, unsigned flags);
36d43a43 454extern struct vfsmount *nfs_d_automount(struct path *path);
f2aedb71
DH		 455int nfs_submount(struct fs_context *, struct nfs_server *);
456int nfs_do_submount(struct fs_context *);
f7b422b1 457
54ceac45 458/* getroot.c */
62a55d08 459extern int nfs_get_root(struct super_block *s, struct fs_context *fc);
89d77c8f 460#if IS_ENABLED(CONFIG_NFS_V4)
5e6b1990 461extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool);
7d4e2747 462#endif
f7b422b1 463
061ae2ed 464struct nfs_pgio_completion_ops;
f11c88af 465/* read.c */
584aa810 466extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
fab5fc25 467 struct inode *inode, bool force_mds,
584aa810 468 const struct nfs_pgio_completion_ops *compl_ops);
f11c88af 469extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
493292dd 470extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
e885de1a 471
fbdefd64 472/* super.c */
fbdefd64
BS		 473void nfs_umount_begin(struct super_block *);
474int nfs_statfs(struct dentry *, struct kstatfs *);
475int nfs_show_options(struct seq_file *, struct dentry *);
476int nfs_show_devname(struct seq_file *, struct dentry *);
477int nfs_show_path(struct seq_file *, struct dentry *);
478int nfs_show_stats(struct seq_file *, struct dentry *);
f2aedb71 479int nfs_reconfigure(struct fs_context *);
fbdefd64 480
def6ed7e 481/* write.c */
1763da12 482extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
a20c93e3 483 struct inode *inode, int ioflags, bool force_mds,
1763da12 484 const struct nfs_pgio_completion_ops *compl_ops);
dce81290 485extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
0b7c0153 486extern void nfs_commit_free(struct nfs_commit_data *p);
def6ed7e 487extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
0b7c0153
FI		 488extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
489extern int nfs_initiate_commit(struct rpc_clnt *clnt,
490 struct nfs_commit_data *data,
c36aae9a 491 const struct nfs_rpc_ops *nfs_ops,
e0c2b380 492 const struct rpc_call_ops *call_ops,
9f0ec176 493 int how, int flags);
0b7c0153 494extern void nfs_init_commit(struct nfs_commit_data *data,
e0c2b380 495 struct list_head *head,
f453a54a
FI		 496 struct pnfs_layout_segment *lseg,
497 struct nfs_commit_info *cinfo);
1763da12
FI		 498int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
499 struct nfs_commit_info *cinfo, int max);
ce59515c 500unsigned long nfs_reqs_to_commit(struct nfs_commit_info *);
1763da12
FI		 501int nfs_scan_commit(struct inode *inode, struct list_head *dst,
502 struct nfs_commit_info *cinfo);
503void nfs_mark_request_commit(struct nfs_page *req,
504 struct pnfs_layout_segment *lseg,
b57ff130
WAA		 505 struct nfs_commit_info *cinfo,
506 u32 ds_commit_idx);
c65e6254 507int nfs_write_need_commit(struct nfs_pgio_header *);
a08a8cd3 508void nfs_writeback_update_inode(struct nfs_pgio_header *hdr);
1763da12
FI		 509int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
510 int how, struct nfs_commit_info *cinfo);
e0c2b380 511void nfs_retry_commit(struct list_head *page_list,
ea2cf228 512 struct pnfs_layout_segment *lseg,
b57ff130
WAA		 513 struct nfs_commit_info *cinfo,
514 u32 ds_commit_idx);
0b7c0153 515void nfs_commitdata_release(struct nfs_commit_data *data);
6272dcc6 516void nfs_request_add_commit_list(struct nfs_page *req,
ea2cf228 517 struct nfs_commit_info *cinfo);
86d80f97
TM		 518void nfs_request_add_commit_list_locked(struct nfs_page *req,
519 struct list_head *dst,
520 struct nfs_commit_info *cinfo);
ea2cf228
FI		 521void nfs_request_remove_commit_list(struct nfs_page *req,
522 struct nfs_commit_info *cinfo);
523void nfs_init_cinfo(struct nfs_commit_info *cinfo,
524 struct inode *inode,
525 struct nfs_direct_req *dreq);
dc24826b 526int nfs_key_timeout_notify(struct file *filp, struct inode *inode);
ce52914e 527bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode);
a7d42ddb 528void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio);
e0c2b380 529
837bb1d7
TM		 530int nfs_filemap_write_and_wait_range(struct address_space *mapping,
531 loff_t lstart, loff_t lend);
532
a5314a74 533#ifdef CONFIG_NFS_V4_1
e3b9f7e6
TM		 534static inline void
535pnfs_bucket_clear_pnfs_ds_commit_verifiers(struct pnfs_commit_bucket *buckets,
536 unsigned int nbuckets)
537{
538 unsigned int i;
539
540 for (i = 0; i < nbuckets; i++)
541 buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW;
542}
a5314a74
TM		 543static inline
544void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
545{
e3b9f7e6
TM		 546 struct pnfs_commit_array *array;
547
a9901899
TM		 548 rcu_read_lock();
549 list_for_each_entry_rcu(array, &cinfo->commits, cinfo_list)
e3b9f7e6
TM		 550 pnfs_bucket_clear_pnfs_ds_commit_verifiers(array->buckets,
551 array->nbuckets);
a9901899 552 rcu_read_unlock();
a5314a74
TM		 553}
554#else
555static inline
556void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
557{
558}
559#endif
560
074cc1de
TM		 561#ifdef CONFIG_MIGRATION
562extern int nfs_migrate_page(struct address_space *,
a6bc32b8 563 struct page *, struct page *, enum migrate_mode);
074cc1de 564#endif
def6ed7e 565
8fc3c386
TM		 566static inline int
567nfs_write_verifier_cmp(const struct nfs_write_verifier *v1,
568 const struct nfs_write_verifier *v2)
569{
570 return memcmp(v1->data, v2->data, sizeof(v1->data));
571}
572
1f28476d
TM		 573static inline bool
574nfs_write_match_verf(const struct nfs_writeverf *verf,
575 struct nfs_page *req)
576{
577 return verf->committed > NFS_UNSTABLE &&
578 !nfs_write_verifier_cmp(&req->wb_verf, &verf->verifier);
579}
580
0e862a40
JL		 581/* unlink.c */
582extern struct rpc_task *
583nfs_async_rename(struct inode *old_dir, struct inode *new_dir,
584 struct dentry *old_dentry, struct dentry *new_dentry,
585 void (*complete)(struct rpc_task *, struct nfs_renamedata *));
586extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry);
587
1763da12
FI		 588/* direct.c */
589void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
590 struct nfs_direct_req *dreq);
6296556f 591extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
1763da12 592
cccef3b9 593/* nfs4proc.c */
8cab4c39 594extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
5c6e5b60 595 const struct nfs_client_initdata *);
05f4c350
CL		 596extern int nfs40_walk_client_list(struct nfs_client *clp,
597 struct nfs_client **result,
a52458b4 598 const struct cred *cred);
05f4c350
CL		 599extern int nfs41_walk_client_list(struct nfs_client *clp,
600 struct nfs_client **result,
a52458b4 601 const struct cred *cred);
10e037d1
S		 602extern void nfs4_test_session_trunk(struct rpc_clnt *clnt,
603 struct rpc_xprt *xprt,
604 void *data);
cccef3b9 605
ea7c38fe
TM		 606static inline struct inode *nfs_igrab_and_active(struct inode *inode)
607{
896567ee
TM		 608 struct super_block *sb = inode->i_sb;
609
610 if (sb && nfs_sb_active(sb)) {
611 if (igrab(inode))
612 return inode;
613 nfs_sb_deactive(sb);
ea7c38fe 614 }
896567ee 615 return NULL;
ea7c38fe
TM		 616}
617
618static inline void nfs_iput_and_deactive(struct inode *inode)
619{
620 if (inode != NULL) {
621 struct super_block *sb = inode->i_sb;
622
623 iput(inode);
624 nfs_sb_deactive(sb);
625 }
626}
627
f7b422b1
DH		 628/*
629 * Determine the device name as a string
630 */
b514f872 631static inline char *nfs_devname(struct dentry *dentry,
54ceac45 632 char *buffer, ssize_t buflen)
f7b422b1 633{
b514f872 634 char *dummy;
97a54868 635 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
f7b422b1
DH		 636}
637
638/*
639 * Determine the actual block size (and log2 thereof)
640 */
641static inline
642unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
643{
644 /* make sure blocksize is a power of two */
645 if ((bsize & (bsize - 1)) || nrbitsp) {
646 unsigned char nrbits;
647
648 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
649 ;
650 bsize = 1 << nrbits;
651 if (nrbitsp)
652 *nrbitsp = nrbits;
653 }
654
655 return bsize;
656}
657
658/*
659 * Calculate the number of 512byte blocks used.
660 */
9eaa67c6 661static inline blkcnt_t nfs_calc_block_size(u64 tsize)
f7b422b1 662{
9eaa67c6 663 blkcnt_t used = (tsize + 511) >> 9;
f7b422b1
DH		 664 return (used > ULONG_MAX) ? ULONG_MAX : used;
665}
666
667/*
668 * Compute and set NFS server blocksize
669 */
670static inline
671unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
672{
673 if (bsize < NFS_MIN_FILE_IO_SIZE)
674 bsize = NFS_DEF_FILE_IO_SIZE;
675 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
676 bsize = NFS_MAX_FILE_IO_SIZE;
677
678 return nfs_block_bits(bsize, nrbitsp);
679}
680
681/*
682 * Determine the maximum file size for a superblock
683 */
684static inline
685void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
686{
687 sb->s_maxbytes = (loff_t)maxfilesize;
688 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
689 sb->s_maxbytes = MAX_LFS_FILESIZE;
690}
49a70f27 691
d15bc38d 692/*
8d92890b
N		 693 * Record the page as unstable (an extra writeback period) and mark its
694 * inode as dirty.
d15bc38d
TH		 695 */
696static inline
86d80f97 697void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo)
d15bc38d 698{
86d80f97
TM		 699 if (!cinfo->dreq) {
700 struct inode *inode = page_file_mapping(page)->host;
d15bc38d 701
8d92890b
N		 702 /* This page is really still in write-back - just that the
703 * writeback is happening on the server now.
704 */
705 inc_node_page_state(page, NR_WRITEBACK);
706 inc_wb_stat(&inode_to_bdi(inode)->wb, WB_WRITEBACK);
86d80f97
TM		 707 __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
708 }
d15bc38d
TH		 709}
710
49a70f27
TM		 711/*
712 * Determine the number of bytes of data the page contains
713 */
714static inline
715unsigned int nfs_page_length(struct page *page)
716{
d56b4ddf 717 loff_t i_size = i_size_read(page_file_mapping(page)->host);
49a70f27
TM		 718
719 if (i_size > 0) {
8cd79788 720 pgoff_t index = page_index(page);
09cbfeaf 721 pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT;
8cd79788 722 if (index < end_index)
09cbfeaf 723 return PAGE_SIZE;
8cd79788 724 if (index == end_index)
09cbfeaf 725 return ((i_size - 1) & ~PAGE_MASK) + 1;
49a70f27
TM		 726 }
727 return 0;
728}
8d5658c9 729
0b26a0bf
TM		 730/*
731 * Convert a umode to a dirent->d_type
732 */
733static inline
734unsigned char nfs_umode_to_dtype(umode_t mode)
735{
736 return (mode >> 12) & 15;
737}
738
8d5658c9
TM		 739/*
740 * Determine the number of pages in an array of length 'len' and
741 * with a base offset of 'base'
742 */
743static inline
744unsigned int nfs_page_array_len(unsigned int base, size_t len)
745{
746 return ((unsigned long)len + (unsigned long)base +
747 PAGE_SIZE - 1) >> PAGE_SHIFT;
748}
0110ee15 749
3a1556e8 750/*
ae08483c 751 * Convert a struct timespec64 into a 64-bit change attribute
3a1556e8 752 *
ae08483c 753 * This does approximately the same thing as timespec64_to_ns(),
3a1556e8
TM		 754 * but for calculation efficiency, we multiply the seconds by
755 * 1024*1024*1024.
756 */
757static inline
e86d5a02 758u64 nfs_timespec_to_change_attr(const struct timespec64 *ts)
3a1556e8
TM		 759{
760 return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
761}
1264a2f0
TM		 762
763#ifdef CONFIG_CRC32
764/**
765 * nfs_fhandle_hash - calculate the crc32 hash for the filehandle
766 * @fh - pointer to filehandle
767 *
768 * returns a crc32 hash for the filehandle that is compatible with
769 * the one displayed by "wireshark".
770 */
771static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
772{
773 return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size);
774}
48c9579a
OK		 775static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid)
776{
777 return ~crc32_le(0xFFFFFFFF, &stateid->other[0],
778 NFS4_STATEID_OTHER_SIZE);
779}
1264a2f0
TM		 780#else
781static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
782{
783 return 0;
784}
48c9579a
OK		 785static inline u32 nfs_stateid_hash(nfs4_stateid *stateid)
786{
787 return 0;
788}
1264a2f0 789#endif
0bcbf039
PT		 790
791static inline bool nfs_error_is_fatal(int err)
792{
793 switch (err) {
794 case -ERESTARTSYS:
7dc58ca5 795 case -EINTR:
54551d85
TM		 796 case -EACCES:
797 case -EDQUOT:
798 case -EFBIG:
0bcbf039
PT		 799 case -EIO:
800 case -ENOSPC:
801 case -EROFS:
54551d85 802 case -ESTALE:
0bcbf039 803 case -E2BIG:
2dc23aff 804 case -ENOMEM:
11982a7c 805 case -ETIMEDOUT:
0bcbf039
PT		 806 return true;
807 default:
808 return false;
809 }
810}
bf4b4905 811
8f54c7a4
TM		 812static inline bool nfs_error_is_fatal_on_server(int err)
813{
814 switch (err) {
815 case 0:
816 case -ERESTARTSYS:
817 case -EINTR:
818 return false;
819 }
820 return nfs_error_is_fatal(err);
821}
9954bf92
DH		 822
823/*
824 * Select between a default port value and a user-specified port value.
825 * If a zero value is set, then autobind will be used.
826 */
827static inline void nfs_set_port(struct sockaddr *sap, int *port,
828 const unsigned short default_port)
829{
830 if (*port == NFS_UNSPEC_PORT)
831 *port = default_port;
832
833 rpc_set_port(sap, *port);
834}
Linux 6.x block layer and io_uring tree(s)