projects / linux-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFS: Create a generic_pgio function
[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>
f7b422b1 9
08734048
DH		 10#define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS)
11
54ceac45 12struct nfs_string;
54ceac45
DH		 13
14/* Maximum number of readahead requests
15 * FIXME: this should really be a sysctl so that users may tune it to suit
16 * their needs. People that do NFS over a slow network, might for
17 * instance want to reduce it to something closer to 1 for improved
18 * interactive response.
19 */
20#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
21
7ebb9315
BS		 22static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr)
23{
24 if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid))
25 fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT;
26}
27
533eb461
AA		 28static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr)
29{
30 if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) ||
31 (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) &&
32 ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0)))
33 return 0;
34
35 fattr->fileid = fattr->mounted_on_fileid;
36 return 1;
37}
38
f7b422b1
DH		 39struct nfs_clone_mount {
40 const struct super_block *sb;
41 const struct dentry *dentry;
42 struct nfs_fh *fh;
43 struct nfs_fattr *fattr;
44 char *hostname;
45 char *mnt_path;
6677d095
CL		 46 struct sockaddr *addr;
47 size_t addrlen;
f7b422b1
DH		 48 rpc_authflavor_t authflavor;
49};
50
a14017db
CL		 51/*
52 * Note: RFC 1813 doesn't limit the number of auth flavors that
53 * a server can return, so make something up.
54 */
55#define NFS_MAX_SECFLAVORS (12)
56
4cfd74fc
CL		 57/*
58 * Value used if the user did not specify a port value.
59 */
60#define NFS_UNSPEC_PORT (-1)
61
56e4ebf8
BS		 62/*
63 * Maximum number of pages that readdir can use for creating
64 * a vmapped array of pages.
65 */
66#define NFS_MAX_READDIR_PAGES 8
67
fcf10398
BS		 68struct nfs_client_initdata {
69 unsigned long init_flags;
70 const char *hostname;
71 const struct sockaddr *addr;
72 size_t addrlen;
ab7017a3 73 struct nfs_subversion *nfs_mod;
fcf10398
BS		 74 int proto;
75 u32 minorversion;
76 struct net *net;
77};
78
6b18eaa0
TT		 79/*
80 * In-kernel mount arguments
81 */
82struct nfs_parsed_mount_data {
83 int flags;
8cb7f74e
CL		 84 unsigned int rsize, wsize;
85 unsigned int timeo, retrans;
86 unsigned int acregmin, acregmax,
6b18eaa0 87 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;
b72e4f42 97 bool need_mount;
6b18eaa0
TT		 98
99 struct {
4c568017
CL		 100 struct sockaddr_storage address;
101 size_t addrlen;
6b18eaa0 102 char *hostname;
78fa701f 103 u32 version;
4cfd74fc 104 int port;
78fa701f 105 unsigned short protocol;
6b18eaa0
TT		 106 } mount_server;
107
108 struct {
4c568017
CL		 109 struct sockaddr_storage address;
110 size_t addrlen;
6b18eaa0
TT		 111 char *hostname;
112 char *export_path;
4cfd74fc 113 int port;
78fa701f 114 unsigned short protocol;
6b18eaa0 115 } nfs_server;
f9c3a380
EP		 116
117 struct security_mnt_opts lsm_opts;
e50a7a1a 118 struct net *net;
6b18eaa0
TT		 119};
120
146ec944 121/* mount_clnt.c */
c5d120f8
CL		 122struct nfs_mount_request {
123 struct sockaddr *sap;
124 size_t salen;
125 char *hostname;
126 char *dirpath;
127 u32 version;
128 unsigned short protocol;
129 struct nfs_fh *fh;
50a737f8 130 int noresvport;
8e02f6b9
CL		 131 unsigned int *auth_flav_len;
132 rpc_authflavor_t *auth_flavs;
6d59b8d5 133 struct net *net;
c5d120f8
CL		 134};
135
fbdefd64
BS		 136struct nfs_mount_info {
137 void (*fill_super)(struct super_block *, struct nfs_mount_info *);
138 int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *);
139 struct nfs_parsed_mount_data *parsed;
140 struct nfs_clone_mount *cloned;
141 struct nfs_fh *mntfh;
142};
143
c5d120f8 144extern int nfs_mount(struct nfs_mount_request *info);
0b524123 145extern void nfs_umount(const struct nfs_mount_request *info);
146ec944 146
24c8dbbb 147/* client.c */
a613fa16 148extern const struct rpc_program nfs_program;
6b13168b 149extern void nfs_clients_init(struct net *net);
6663ee7f 150extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *);
428360d7 151int nfs_create_rpc_client(struct nfs_client *, const struct rpc_timeout *, rpc_authflavor_t);
fcf10398
BS		 152struct nfs_client *nfs_get_client(const struct nfs_client_initdata *,
153 const struct rpc_timeout *, const char *,
154 rpc_authflavor_t);
155int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *);
156void nfs_server_insert_lists(struct nfs_server *);
32e62b7c 157void nfs_server_remove_lists(struct nfs_server *);
fcf10398
BS		 158void nfs_init_timeout_values(struct rpc_timeout *, int, unsigned int, unsigned int);
159int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t,
160 rpc_authflavor_t);
161struct nfs_server *nfs_alloc_server(void);
162void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *);
54ceac45 163
28cd1b3f 164extern void nfs_cleanup_cb_ident_idr(struct net *);
24c8dbbb 165extern void nfs_put_client(struct nfs_client *);
cdb7eced 166extern void nfs_free_client(struct nfs_client *);
28cd1b3f 167extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
c36fca52 168extern struct nfs_client *
c7add9a9 169nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
459de2ed 170 struct nfs4_sessionid *, u32);
1179acc6 171extern struct nfs_server *nfs_create_server(struct nfs_mount_info *,
ab7017a3 172 struct nfs_subversion *);
91ea40b9 173extern struct nfs_server *nfs4_create_server(
1179acc6
BS		 174 struct nfs_mount_info *,
175 struct nfs_subversion *);
54ceac45
DH		 176extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *,
177 struct nfs_fh *);
32e62b7c 178extern int nfs4_update_server(struct nfs_server *server, const char *hostname,
292f503c
TM		 179 struct sockaddr *sap, size_t salen,
180 struct net *net);
54ceac45
DH		 181extern void nfs_free_server(struct nfs_server *server);
182extern struct nfs_server *nfs_clone_server(struct nfs_server *,
183 struct nfs_fh *,
7e6eb683
BS		 184 struct nfs_fattr *,
185 rpc_authflavor_t);
4697bd5e 186extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
76db6d95 187extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
d83217c1
AA		 188extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
189 const struct sockaddr *ds_addr,
98fc685a
AA		 190 int ds_addrlen, int ds_proto,
191 unsigned int ds_timeo,
192 unsigned int ds_retrans);
0e20162e
AA		 193extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
194 struct inode *);
6aaca566
DH		 195#ifdef CONFIG_PROC_FS
196extern int __init nfs_fs_proc_init(void);
197extern void nfs_fs_proc_exit(void);
198#else
199static inline int nfs_fs_proc_init(void)
200{
201 return 0;
202}
203static inline void nfs_fs_proc_exit(void)
204{
205}
206#endif
24c8dbbb 207
fcf10398
BS		 208#ifdef CONFIG_NFS_V4_1
209int nfs_sockaddr_match_ipaddr(const struct sockaddr *, const struct sockaddr *);
210#endif
211
1179acc6 212/* nfs3client.c */
1c606fb7 213#if IS_ENABLED(CONFIG_NFS_V3)
1179acc6
BS		 214struct nfs_server *nfs3_create_server(struct nfs_mount_info *, struct nfs_subversion *);
215struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *,
216 struct nfs_fattr *, rpc_authflavor_t);
217#endif
218
f7b422b1
DH		 219/* callback_xdr.c */
220extern struct svc_version nfs4_callback_version1;
07bccc2d 221extern struct svc_version nfs4_callback_version4;
f7b422b1 222
4db6e0b7 223struct nfs_pageio_descriptor;
f7b422b1
DH		 224/* pagelist.c */
225extern int __init nfs_init_nfspagecache(void);
266bee88 226extern void nfs_destroy_nfspagecache(void);
f7b422b1 227extern int __init nfs_init_readpagecache(void);
266bee88 228extern void nfs_destroy_readpagecache(void);
f7b422b1 229extern int __init nfs_init_writepagecache(void);
266bee88 230extern void nfs_destroy_writepagecache(void);
f7b422b1 231
f7b422b1 232extern int __init nfs_init_directcache(void);
266bee88 233extern void nfs_destroy_directcache(void);
4db6e0b7
FI		 234extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
235 struct nfs_pgio_header *hdr,
236 void (*release)(struct nfs_pgio_header *hdr));
237void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
577b4232
TM		 238int nfs_iocounter_wait(struct nfs_io_counter *c);
239
4a0de55c
AS		 240struct nfs_rw_header *nfs_rw_header_alloc(const struct nfs_rw_ops *);
241void nfs_rw_header_free(struct nfs_pgio_header *);
00bfa30a 242void nfs_pgio_data_release(struct nfs_pgio_data *);
ef2c488c 243int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *);
00bfa30a 244
577b4232
TM		 245static inline void nfs_iocounter_init(struct nfs_io_counter *c)
246{
247 c->flags = 0;
248 atomic_set(&c->io_count, 0);
249}
f7b422b1
DH		 250
251/* nfs2xdr.c */
252extern struct rpc_procinfo nfs_procedures[];
573c4e1e
CL		 253extern int nfs2_decode_dirent(struct xdr_stream *,
254 struct nfs_entry *, int);
f7b422b1
DH		 255
256/* nfs3xdr.c */
257extern struct rpc_procinfo nfs3_procedures[];
573c4e1e
CL		 258extern int nfs3_decode_dirent(struct xdr_stream *,
259 struct nfs_entry *, int);
f7b422b1
DH		 260
261/* nfs4xdr.c */
89d77c8f 262#if IS_ENABLED(CONFIG_NFS_V4)
573c4e1e
CL		 263extern int nfs4_decode_dirent(struct xdr_stream *,
264 struct nfs_entry *, int);
7d4e2747 265#endif
2449ea2e
AB		 266#ifdef CONFIG_NFS_V4_1
267extern const u32 nfs41_maxread_overhead;
268extern const u32 nfs41_maxwrite_overhead;
f1c097be 269extern const u32 nfs41_maxgetdevinfo_overhead;
2449ea2e 270#endif
f7b422b1
DH		 271
272/* nfs4proc.c */
89d77c8f 273#if IS_ENABLED(CONFIG_NFS_V4)
f7b422b1 274extern struct rpc_procinfo nfs4_procedures[];
d75d5414 275#endif
f7b422b1 276
694e096f
AS		 277#ifdef CONFIG_NFS_V4_SECURITY_LABEL
278extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags);
279static inline void nfs4_label_free(struct nfs4_label *label)
280{
281 if (label) {
282 kfree(label->label);
283 kfree(label);
284 }
285 return;
286}
fd1defc2
TM		 287
288static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
289{
290 if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL))
291 nfsi->cache_validity |= NFS_INO_INVALID_LABEL;
292}
694e096f
AS		 293#else
294static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; }
295static inline void nfs4_label_free(void *label) {}
fd1defc2
TM		 296static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
297{
298}
694e096f
AS		 299#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
300
7fe5c398
TM		 301/* proc.c */
302void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
8cab4c39 303extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
45a52a02 304 const struct rpc_timeout *timeparms,
f8407299 305 const char *ip_addr);
7fe5c398 306
979df72e 307/* dir.c */
311324ad 308extern void nfs_force_use_readdirplus(struct inode *dir);
1ab6c499
DC		 309extern unsigned long nfs_access_cache_count(struct shrinker *shrink,
310 struct shrink_control *sc);
311extern unsigned long nfs_access_cache_scan(struct shrinker *shrink,
312 struct shrink_control *sc);
597d9289
BS		 313struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
314int nfs_create(struct inode *, struct dentry *, umode_t, bool);
315int nfs_mkdir(struct inode *, struct dentry *, umode_t);
316int nfs_rmdir(struct inode *, struct dentry *);
317int nfs_unlink(struct inode *, struct dentry *);
318int nfs_symlink(struct inode *, struct dentry *, const char *);
319int nfs_link(struct dentry *, struct inode *, struct dentry *);
320int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
321int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
979df72e 322
ce4ef7c0
BS		 323/* file.c */
324int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int);
325loff_t nfs_file_llseek(struct file *, loff_t, int);
326int nfs_file_flush(struct file *, fl_owner_t);
327ssize_t nfs_file_read(struct kiocb *, const struct iovec *, unsigned long, loff_t);
328ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *,
329 size_t, unsigned int);
330int nfs_file_mmap(struct file *, struct vm_area_struct *);
331ssize_t nfs_file_write(struct kiocb *, const struct iovec *, unsigned long, loff_t);
332int nfs_file_release(struct inode *, struct file *);
333int nfs_lock(struct file *, int, struct file_lock *);
334int nfs_flock(struct file *, int, struct file_lock *);
335ssize_t nfs_file_splice_write(struct pipe_inode_info *, struct file *, loff_t *,
336 size_t, unsigned int);
337int nfs_check_flags(int);
338int nfs_setlease(struct file *, long, struct file_lock **);
339
f7b422b1 340/* inode.c */
5746006f 341extern struct workqueue_struct *nfsiod_workqueue;
f7b422b1
DH		 342extern struct inode *nfs_alloc_inode(struct super_block *sb);
343extern void nfs_destroy_inode(struct inode *);
a9185b41 344extern int nfs_write_inode(struct inode *, struct writeback_control *);
eed99357 345extern int nfs_drop_inode(struct inode *);
19d87ca3 346extern void nfs_clear_inode(struct inode *);
b57922d9 347extern void nfs_evict_inode(struct inode *);
f41f7418 348void nfs_zap_acl_cache(struct inode *inode);
72cb77f4 349extern int nfs_wait_bit_killable(void *word);
f7b422b1
DH		 350
351/* super.c */
6a74490d 352extern const struct super_operations nfs_sops;
ab7017a3 353extern struct file_system_type nfs_fs_type;
54ceac45 354extern struct file_system_type nfs_xdev_fs_type;
89d77c8f 355#if IS_ENABLED(CONFIG_NFS_V4)
54ceac45
DH		 356extern struct file_system_type nfs4_xdev_fs_type;
357extern struct file_system_type nfs4_referral_fs_type;
f7b422b1 358#endif
4d4b69dd 359bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t);
ff9099f2
BS		 360struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *,
361 struct nfs_subversion *);
fbdefd64
BS		 362void nfs_initialise_sb(struct super_block *);
363int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
364int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
ab7017a3
BS		 365struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *,
366 struct nfs_mount_info *, struct nfs_subversion *);
fbdefd64
BS		 367struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *);
368struct dentry * nfs_xdev_mount_common(struct file_system_type *, int,
369 const char *, struct nfs_mount_info *);
370void nfs_kill_super(struct super_block *);
371void nfs_fill_super(struct super_block *, struct nfs_mount_info *);
4ebd9ab3 372
f7b422b1 373extern struct rpc_stat nfs_rpcstat;
4ebd9ab3 374
f7b422b1
DH		 375extern int __init register_nfs_fs(void);
376extern void __exit unregister_nfs_fs(void);
1daef0a8
TM		 377extern void nfs_sb_active(struct super_block *sb);
378extern void nfs_sb_deactive(struct super_block *sb);
f7b422b1
DH		 379
380/* namespace.c */
97a54868 381#define NFS_PATH_CANONICAL 1
b514f872 382extern char *nfs_path(char **p, struct dentry *dentry,
97a54868 383 char *buffer, ssize_t buflen, unsigned flags);
36d43a43 384extern struct vfsmount *nfs_d_automount(struct path *path);
281cad46
BS		 385struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *,
386 struct nfs_fh *, struct nfs_fattr *);
387struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *,
388 struct nfs_fattr *, rpc_authflavor_t);
f7b422b1 389
54ceac45 390/* getroot.c */
0d5839ad
AV		 391extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *,
392 const char *);
89d77c8f 393#if IS_ENABLED(CONFIG_NFS_V4)
0d5839ad
AV		 394extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *,
395 const char *);
54ceac45 396
5e6b1990 397extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool);
7d4e2747 398#endif
f7b422b1 399
061ae2ed 400struct nfs_pgio_completion_ops;
f11c88af 401/* read.c */
584aa810 402extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
fab5fc25 403 struct inode *inode, bool force_mds,
584aa810 404 const struct nfs_pgio_completion_ops *compl_ops);
c5996c4e 405extern int nfs_initiate_read(struct rpc_clnt *clnt,
9c7e1b3d 406 struct nfs_pgio_data *data,
9f0ec176 407 const struct rpc_call_ops *call_ops, int flags);
f11c88af 408extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
493292dd 409extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
e885de1a 410
fbdefd64
BS		 411/* super.c */
412void nfs_clone_super(struct super_block *, struct nfs_mount_info *);
413void nfs_umount_begin(struct super_block *);
414int nfs_statfs(struct dentry *, struct kstatfs *);
415int nfs_show_options(struct seq_file *, struct dentry *);
416int nfs_show_devname(struct seq_file *, struct dentry *);
417int nfs_show_path(struct seq_file *, struct dentry *);
418int nfs_show_stats(struct seq_file *, struct dentry *);
419void nfs_put_super(struct super_block *);
420int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
421
def6ed7e 422/* write.c */
1763da12 423extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
a20c93e3 424 struct inode *inode, int ioflags, bool force_mds,
1763da12 425 const struct nfs_pgio_completion_ops *compl_ops);
dce81290 426extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
0b7c0153 427extern void nfs_commit_free(struct nfs_commit_data *p);
c5996c4e 428extern int nfs_initiate_write(struct rpc_clnt *clnt,
9c7e1b3d 429 struct nfs_pgio_data *data,
a69aef14 430 const struct rpc_call_ops *call_ops,
9f0ec176 431 int how, int flags);
def6ed7e 432extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
0b7c0153
FI		 433extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
434extern int nfs_initiate_commit(struct rpc_clnt *clnt,
435 struct nfs_commit_data *data,
e0c2b380 436 const struct rpc_call_ops *call_ops,
9f0ec176 437 int how, int flags);
0b7c0153 438extern void nfs_init_commit(struct nfs_commit_data *data,
e0c2b380 439 struct list_head *head,
f453a54a
FI		 440 struct pnfs_layout_segment *lseg,
441 struct nfs_commit_info *cinfo);
1763da12
FI		 442int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
443 struct nfs_commit_info *cinfo, int max);
ce59515c 444unsigned long nfs_reqs_to_commit(struct nfs_commit_info *);
1763da12
FI		 445int nfs_scan_commit(struct inode *inode, struct list_head *dst,
446 struct nfs_commit_info *cinfo);
447void nfs_mark_request_commit(struct nfs_page *req,
448 struct pnfs_layout_segment *lseg,
449 struct nfs_commit_info *cinfo);
450int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
451 int how, struct nfs_commit_info *cinfo);
e0c2b380 452void nfs_retry_commit(struct list_head *page_list,
ea2cf228
FI		 453 struct pnfs_layout_segment *lseg,
454 struct nfs_commit_info *cinfo);
0b7c0153 455void nfs_commitdata_release(struct nfs_commit_data *data);
ea2cf228
FI		 456void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst,
457 struct nfs_commit_info *cinfo);
458void nfs_request_remove_commit_list(struct nfs_page *req,
459 struct nfs_commit_info *cinfo);
460void nfs_init_cinfo(struct nfs_commit_info *cinfo,
461 struct inode *inode,
462 struct nfs_direct_req *dreq);
dc24826b
AA		 463int nfs_key_timeout_notify(struct file *filp, struct inode *inode);
464bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx);
e0c2b380 465
074cc1de
TM		 466#ifdef CONFIG_MIGRATION
467extern int nfs_migrate_page(struct address_space *,
a6bc32b8 468 struct page *, struct page *, enum migrate_mode);
074cc1de
TM		 469#else
470#define nfs_migrate_page NULL
471#endif
def6ed7e 472
0e862a40
JL		 473/* unlink.c */
474extern struct rpc_task *
475nfs_async_rename(struct inode *old_dir, struct inode *new_dir,
476 struct dentry *old_dentry, struct dentry *new_dentry,
477 void (*complete)(struct rpc_task *, struct nfs_renamedata *));
478extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry);
479
1763da12
FI		 480/* direct.c */
481void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
482 struct nfs_direct_req *dreq);
1d59d61f
TM		 483static inline void nfs_inode_dio_wait(struct inode *inode)
484{
485 inode_dio_wait(inode);
486}
6296556f 487extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
1763da12 488
cccef3b9 489/* nfs4proc.c */
9c7e1b3d 490extern void __nfs4_read_done_cb(struct nfs_pgio_data *);
8cab4c39 491extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
45a52a02 492 const struct rpc_timeout *timeparms,
f8407299 493 const char *ip_addr);
05f4c350
CL		 494extern int nfs40_walk_client_list(struct nfs_client *clp,
495 struct nfs_client **result,
496 struct rpc_cred *cred);
497extern int nfs41_walk_client_list(struct nfs_client *clp,
498 struct nfs_client **result,
499 struct rpc_cred *cred);
cccef3b9 500
f7b422b1
DH		 501/*
502 * Determine the device name as a string
503 */
b514f872 504static inline char *nfs_devname(struct dentry *dentry,
54ceac45 505 char *buffer, ssize_t buflen)
f7b422b1 506{
b514f872 507 char *dummy;
97a54868 508 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
f7b422b1
DH		 509}
510
511/*
512 * Determine the actual block size (and log2 thereof)
513 */
514static inline
515unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
516{
517 /* make sure blocksize is a power of two */
518 if ((bsize & (bsize - 1)) || nrbitsp) {
519 unsigned char nrbits;
520
521 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
522 ;
523 bsize = 1 << nrbits;
524 if (nrbitsp)
525 *nrbitsp = nrbits;
526 }
527
528 return bsize;
529}
530
531/*
532 * Calculate the number of 512byte blocks used.
533 */
9eaa67c6 534static inline blkcnt_t nfs_calc_block_size(u64 tsize)
f7b422b1 535{
9eaa67c6 536 blkcnt_t used = (tsize + 511) >> 9;
f7b422b1
DH		 537 return (used > ULONG_MAX) ? ULONG_MAX : used;
538}
539
540/*
541 * Compute and set NFS server blocksize
542 */
543static inline
544unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
545{
546 if (bsize < NFS_MIN_FILE_IO_SIZE)
547 bsize = NFS_DEF_FILE_IO_SIZE;
548 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
549 bsize = NFS_MAX_FILE_IO_SIZE;
550
551 return nfs_block_bits(bsize, nrbitsp);
552}
553
554/*
555 * Determine the maximum file size for a superblock
556 */
557static inline
558void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
559{
560 sb->s_maxbytes = (loff_t)maxfilesize;
561 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
562 sb->s_maxbytes = MAX_LFS_FILESIZE;
563}
49a70f27
TM		 564
565/*
566 * Determine the number of bytes of data the page contains
567 */
568static inline
569unsigned int nfs_page_length(struct page *page)
570{
d56b4ddf 571 loff_t i_size = i_size_read(page_file_mapping(page)->host);
49a70f27
TM		 572
573 if (i_size > 0) {
d56b4ddf 574 pgoff_t page_index = page_file_index(page);
49a70f27 575 pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
d56b4ddf 576 if (page_index < end_index)
49a70f27 577 return PAGE_CACHE_SIZE;
d56b4ddf 578 if (page_index == end_index)
49a70f27
TM		 579 return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1;
580 }
581 return 0;
582}
8d5658c9 583
0b26a0bf
TM		 584/*
585 * Convert a umode to a dirent->d_type
586 */
587static inline
588unsigned char nfs_umode_to_dtype(umode_t mode)
589{
590 return (mode >> 12) & 15;
591}
592
8d5658c9
TM		 593/*
594 * Determine the number of pages in an array of length 'len' and
595 * with a base offset of 'base'
596 */
597static inline
598unsigned int nfs_page_array_len(unsigned int base, size_t len)
599{
600 return ((unsigned long)len + (unsigned long)base +
601 PAGE_SIZE - 1) >> PAGE_SHIFT;
602}
0110ee15 603
3a1556e8
TM		 604/*
605 * Convert a struct timespec into a 64-bit change attribute
606 *
607 * This does approximately the same thing as timespec_to_ns(),
608 * but for calculation efficiency, we multiply the seconds by
609 * 1024*1024*1024.
610 */
611static inline
612u64 nfs_timespec_to_change_attr(const struct timespec *ts)
613{
614 return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
615}
1264a2f0
TM		 616
617#ifdef CONFIG_CRC32
618/**
619 * nfs_fhandle_hash - calculate the crc32 hash for the filehandle
620 * @fh - pointer to filehandle
621 *
622 * returns a crc32 hash for the filehandle that is compatible with
623 * the one displayed by "wireshark".
624 */
625static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
626{
627 return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size);
628}
629#else
630static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
631{
632 return 0;
633}
634#endif
Linux 6.x block layer and io_uring tree(s)