blob: 5bdf952f414b54c04987e1c3ce5c23ac0bf95961 [file] [log] [blame]
David Howellsf7b422b2006-06-09 09:34:33 -04001/*
2 * NFS internal definitions
3 */
4
Andy Adamsoneedc0202009-04-01 09:22:41 -04005#include "nfs4_fs.h"
David Howellsf7b422b2006-06-09 09:34:33 -04006#include <linux/mount.h>
Eric Parisf9c3a382008-03-05 14:20:18 -05007#include <linux/security.h>
Trond Myklebust1264a2f2013-08-12 16:06:31 -04008#include <linux/crc32.h>
Peng Tao47af81f2014-11-10 08:35:34 +08009#include <linux/nfs_page.h>
Ingo Molnar5dd43ce2017-06-20 12:19:09 +020010#include <linux/wait_bit.h>
David Howellsf7b422b2006-06-09 09:34:33 -040011
David Howells08734042009-04-03 16:42:42 +010012#define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS)
13
Peng Tao20fa1902017-06-29 06:34:53 -070014extern const struct export_operations nfs_export_ops;
15
David Howells54ceac42006-08-22 20:06:13 -040016struct nfs_string;
David Howells54ceac42006-08-22 20:06:13 -040017
18/* Maximum number of readahead requests
19 * FIXME: this should really be a sysctl so that users may tune it to suit
20 * their needs. People that do NFS over a slow network, might for
21 * instance want to reduce it to something closer to 1 for improved
22 * interactive response.
23 */
24#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
25
Bryan Schumaker7ebb9312011-03-24 17:12:30 +000026static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr)
27{
28 if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid))
29 fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT;
30}
31
Andy Adamson533eb462011-06-13 18:25:56 -040032static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr)
33{
34 if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) ||
35 (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) &&
36 ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0)))
37 return 0;
Andy Adamson533eb462011-06-13 18:25:56 -040038 return 1;
39}
40
David Howellsf7b422b2006-06-09 09:34:33 -040041struct nfs_clone_mount {
42 const struct super_block *sb;
43 const struct dentry *dentry;
44 struct nfs_fh *fh;
45 struct nfs_fattr *fattr;
46 char *hostname;
47 char *mnt_path;
Chuck Lever6677d092007-12-10 14:59:06 -050048 struct sockaddr *addr;
49 size_t addrlen;
David Howellsf7b422b2006-06-09 09:34:33 -040050 rpc_authflavor_t authflavor;
51};
52
\"Talpey, Thomas\6b18eaa02007-09-10 13:43:29 -040053/*
Chuck Levera14017d2009-06-17 18:02:12 -070054 * Note: RFC 1813 doesn't limit the number of auth flavors that
55 * a server can return, so make something up.
56 */
57#define NFS_MAX_SECFLAVORS (12)
58
59/*
Chuck Lever4cfd74f2009-09-08 19:49:47 -040060 * Value used if the user did not specify a port value.
61 */
62#define NFS_UNSPEC_PORT (-1)
63
Trond Myklebusta956bed2016-08-16 10:26:47 -040064#define NFS_UNSPEC_RETRANS (UINT_MAX)
65#define NFS_UNSPEC_TIMEO (UINT_MAX)
66
Chuck Lever4cfd74f2009-09-08 19:49:47 -040067/*
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -040068 * Maximum number of pages that readdir can use for creating
69 * a vmapped array of pages.
70 */
71#define NFS_MAX_READDIR_PAGES 8
72
Bryan Schumakerfcf10392012-07-16 16:39:18 -040073struct nfs_client_initdata {
74 unsigned long init_flags;
Trond Myklebust5c6e5b62016-06-22 14:13:12 -040075 const char *hostname; /* Hostname of the server */
76 const struct sockaddr *addr; /* Address of the server */
77 const char *nodename; /* Hostname of the client */
78 const char *ip_addr; /* IP address of the client */
Bryan Schumakerfcf10392012-07-16 16:39:18 -040079 size_t addrlen;
Bryan Schumakerab7017a2012-07-30 16:05:16 -040080 struct nfs_subversion *nfs_mod;
Bryan Schumakerfcf10392012-07-16 16:39:18 -040081 int proto;
82 u32 minorversion;
83 struct net *net;
Trond Myklebust5c6e5b62016-06-22 14:13:12 -040084 const struct rpc_timeout *timeparms;
Bryan Schumakerfcf10392012-07-16 16:39:18 -040085};
86
Bryan Schumaker56e4ebf2010-10-20 15:44:37 -040087/*
\"Talpey, Thomas\6b18eaa02007-09-10 13:43:29 -040088 * In-kernel mount arguments
89 */
90struct nfs_parsed_mount_data {
91 int flags;
Chuck Lever8cb7f742012-09-14 17:23:14 -040092 unsigned int rsize, wsize;
93 unsigned int timeo, retrans;
94 unsigned int acregmin, acregmax,
\"Talpey, Thomas\6b18eaa02007-09-10 13:43:29 -040095 acdirmin, acdirmax;
Chuck Lever8cb7f742012-09-14 17:23:14 -040096 unsigned int namlen;
David Howellsb797cac2009-04-03 16:42:48 +010097 unsigned int options;
\"Talpey, Thomas\6b18eaa02007-09-10 13:43:29 -040098 unsigned int bsize;
Weston Andros Adamsona3f73c22013-10-18 15:15:16 -040099 struct nfs_auth_info auth_info;
100 rpc_authflavor_t selected_flavor;
\"Talpey, Thomas\6b18eaa02007-09-10 13:43:29 -0400101 char *client_address;
Chuck Lever764302c2009-09-08 19:50:03 -0400102 unsigned int version;
Mike Sager3fd5be92009-04-01 09:21:48 -0400103 unsigned int minorversion;
David Howells08734042009-04-03 16:42:42 +0100104 char *fscache_uniq;
Bryan Schumakerb72e4f42012-05-10 15:07:40 -0400105 bool need_mount;
\"Talpey, Thomas\6b18eaa02007-09-10 13:43:29 -0400106
107 struct {
Chuck Lever4c568012007-12-10 14:59:28 -0500108 struct sockaddr_storage address;
109 size_t addrlen;
\"Talpey, Thomas\6b18eaa02007-09-10 13:43:29 -0400110 char *hostname;
Chuck Lever78fa7012008-03-14 14:10:15 -0400111 u32 version;
Chuck Lever4cfd74f2009-09-08 19:49:47 -0400112 int port;
Chuck Lever78fa7012008-03-14 14:10:15 -0400113 unsigned short protocol;
\"Talpey, Thomas\6b18eaa02007-09-10 13:43:29 -0400114 } mount_server;
115
116 struct {
Chuck Lever4c568012007-12-10 14:59:28 -0500117 struct sockaddr_storage address;
118 size_t addrlen;
\"Talpey, Thomas\6b18eaa02007-09-10 13:43:29 -0400119 char *hostname;
120 char *export_path;
Chuck Lever4cfd74f2009-09-08 19:49:47 -0400121 int port;
Chuck Lever78fa7012008-03-14 14:10:15 -0400122 unsigned short protocol;
\"Talpey, Thomas\6b18eaa02007-09-10 13:43:29 -0400123 } nfs_server;
Eric Parisf9c3a382008-03-05 14:20:18 -0500124
125 struct security_mnt_opts lsm_opts;
Stanislav Kinsburskye50a7a12012-01-10 16:12:46 +0400126 struct net *net;
\"Talpey, Thomas\6b18eaa02007-09-10 13:43:29 -0400127};
128
Chuck Lever146ec942008-12-23 15:21:34 -0500129/* mount_clnt.c */
Chuck Leverc5d120f2008-12-23 15:21:35 -0500130struct nfs_mount_request {
131 struct sockaddr *sap;
132 size_t salen;
133 char *hostname;
134 char *dirpath;
135 u32 version;
136 unsigned short protocol;
137 struct nfs_fh *fh;
Chuck Lever50a737f2008-12-23 15:21:37 -0500138 int noresvport;
Chuck Lever8e02f6b9a2009-06-17 18:02:13 -0700139 unsigned int *auth_flav_len;
140 rpc_authflavor_t *auth_flavs;
Stanislav Kinsbursky6d59b8d2012-01-10 16:12:54 +0400141 struct net *net;
Chuck Leverc5d120f2008-12-23 15:21:35 -0500142};
143
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400144struct nfs_mount_info {
145 void (*fill_super)(struct super_block *, struct nfs_mount_info *);
146 int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *);
147 struct nfs_parsed_mount_data *parsed;
148 struct nfs_clone_mount *cloned;
149 struct nfs_fh *mntfh;
150};
151
Chuck Leverc5d120f2008-12-23 15:21:35 -0500152extern int nfs_mount(struct nfs_mount_request *info);
Chuck Lever0b524122009-08-09 15:09:30 -0400153extern void nfs_umount(const struct nfs_mount_request *info);
Chuck Lever146ec942008-12-23 15:21:34 -0500154
David Howells24c8dbb2006-08-22 20:06:10 -0400155/* client.c */
Trond Myklebusta613fa12012-01-20 13:53:56 -0500156extern const struct rpc_program nfs_program;
Stanislav Kinsbursky6b131682012-01-23 17:26:05 +0000157extern void nfs_clients_init(struct net *net);
Bryan Schumaker6663ee72012-06-20 15:53:46 -0400158extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *);
Trond Myklebust5c6e5b62016-06-22 14:13:12 -0400159int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t);
Anna Schumaker7d38de32016-11-17 15:15:55 -0500160struct nfs_client *nfs_get_client(const struct nfs_client_initdata *);
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400161int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *);
162void nfs_server_insert_lists(struct nfs_server *);
Chuck Lever32e62b72013-10-17 14:12:28 -0400163void nfs_server_remove_lists(struct nfs_server *);
Trond Myklebusta956bed2016-08-16 10:26:47 -0400164void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans);
Bryan Schumakerfcf10392012-07-16 16:39:18 -0400165int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t,
166 rpc_authflavor_t);
167struct nfs_server *nfs_alloc_server(void);
168void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *);
David Howells54ceac42006-08-22 20:06:13 -0400169
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000170extern void nfs_cleanup_cb_ident_idr(struct net *);
David Howells24c8dbb2006-08-22 20:06:10 -0400171extern void nfs_put_client(struct nfs_client *);
Bryan Schumakercdb7eced2012-06-20 15:53:45 -0400172extern void nfs_free_client(struct nfs_client *);
Stanislav Kinsbursky28cd1b32012-01-23 17:26:22 +0000173extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
Andy Adamsonc36fca52011-01-06 02:04:32 +0000174extern struct nfs_client *
Stanislav Kinsburskyc7add9a2012-01-26 15:11:49 +0400175nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
Bryan Schumaker459de2e2013-06-05 11:15:01 -0400176 struct nfs4_sessionid *, u32);
Bryan Schumaker1179acc2012-07-30 16:05:19 -0400177extern struct nfs_server *nfs_create_server(struct nfs_mount_info *,
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400178 struct nfs_subversion *);
\"Talpey, Thomas\91ea40b2007-09-10 13:44:33 -0400179extern struct nfs_server *nfs4_create_server(
Bryan Schumaker1179acc2012-07-30 16:05:19 -0400180 struct nfs_mount_info *,
181 struct nfs_subversion *);
David Howells54ceac42006-08-22 20:06:13 -0400182extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *,
183 struct nfs_fh *);
Chuck Lever32e62b72013-10-17 14:12:28 -0400184extern int nfs4_update_server(struct nfs_server *server, const char *hostname,
Trond Myklebust292f5032014-02-16 21:42:56 -0500185 struct sockaddr *sap, size_t salen,
186 struct net *net);
David Howells54ceac42006-08-22 20:06:13 -0400187extern void nfs_free_server(struct nfs_server *server);
188extern struct nfs_server *nfs_clone_server(struct nfs_server *,
189 struct nfs_fh *,
Bryan Schumaker7e6eb682012-04-27 13:27:42 -0400190 struct nfs_fattr *,
191 rpc_authflavor_t);
Weston Andros Adamsona33e4b02017-03-09 12:56:48 -0500192extern bool nfs_client_init_is_complete(const struct nfs_client *clp);
193extern int nfs_client_init_status(const struct nfs_client *clp);
Trond Myklebust4697bd52012-05-23 13:24:36 -0400194extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
Andy Adamson76db6d92009-04-01 09:22:38 -0400195extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
Tigran Mkrtchyan3fc75f12016-06-13 19:57:35 +0200196extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv,
Andy Adamsond83217c2011-03-01 01:34:17 +0000197 const struct sockaddr *ds_addr,
Andy Adamson98fc6852012-04-27 17:53:45 -0400198 int ds_addrlen, int ds_proto,
199 unsigned int ds_timeo,
Peng Tao064172f2014-05-29 21:07:00 +0800200 unsigned int ds_retrans,
Anna Schumaker7d38de32016-11-17 15:15:55 -0500201 u32 minor_version);
Andy Adamson0e201622013-09-06 14:14:00 -0400202extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
203 struct inode *);
Tigran Mkrtchyanb224f7c2016-06-13 20:52:00 +0200204extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv,
Peng Tao1a04c6e2014-05-30 18:15:57 +0800205 const struct sockaddr *ds_addr, int ds_addrlen,
206 int ds_proto, unsigned int ds_timeo,
Anna Schumaker7d38de32016-11-17 15:15:55 -0500207 unsigned int ds_retrans);
David Howells6aaca562006-08-22 20:06:13 -0400208#ifdef CONFIG_PROC_FS
209extern int __init nfs_fs_proc_init(void);
210extern void nfs_fs_proc_exit(void);
Eric W. Biederman65b38852014-07-31 04:35:20 -0700211extern int nfs_fs_proc_net_init(struct net *net);
212extern void nfs_fs_proc_net_exit(struct net *net);
David Howells6aaca562006-08-22 20:06:13 -0400213#else
Eric W. Biederman65b38852014-07-31 04:35:20 -0700214static inline int nfs_fs_proc_net_init(struct net *net)
215{
216 return 0;
217}
218static inline void nfs_fs_proc_net_exit(struct net *net)
219{
220}
David Howells6aaca562006-08-22 20:06:13 -0400221static inline int nfs_fs_proc_init(void)
222{
223 return 0;
224}
225static inline void nfs_fs_proc_exit(void)
226{
227}
228#endif
David Howells24c8dbb2006-08-22 20:06:10 -0400229
David Howellsf7b422b2006-06-09 09:34:33 -0400230/* callback_xdr.c */
Christoph Hellwige9679182017-05-12 16:21:37 +0200231extern const struct svc_version nfs4_callback_version1;
232extern const struct svc_version nfs4_callback_version4;
David Howellsf7b422b2006-06-09 09:34:33 -0400233
Fred Isaman4db6e0b2012-04-20 14:47:46 -0400234struct nfs_pageio_descriptor;
David Howellsf7b422b2006-06-09 09:34:33 -0400235/* pagelist.c */
236extern int __init nfs_init_nfspagecache(void);
David Brownell266bee82006-06-27 12:59:15 -0700237extern void nfs_destroy_nfspagecache(void);
David Howellsf7b422b2006-06-09 09:34:33 -0400238extern int __init nfs_init_readpagecache(void);
David Brownell266bee82006-06-27 12:59:15 -0700239extern void nfs_destroy_readpagecache(void);
David Howellsf7b422b2006-06-09 09:34:33 -0400240extern int __init nfs_init_writepagecache(void);
David Brownell266bee82006-06-27 12:59:15 -0700241extern void nfs_destroy_writepagecache(void);
David Howellsf7b422b2006-06-09 09:34:33 -0400242
David Howellsf7b422b2006-06-09 09:34:33 -0400243extern int __init nfs_init_directcache(void);
David Brownell266bee82006-06-27 12:59:15 -0700244extern void nfs_destroy_directcache(void);
Fred Isaman4db6e0b2012-04-20 14:47:46 -0400245extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
246 struct nfs_pgio_header *hdr,
247 void (*release)(struct nfs_pgio_header *hdr));
248void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
Benjamin Coddington210c7c12016-01-06 10:40:18 -0500249int nfs_iocounter_wait(struct nfs_lock_context *l_ctx);
Trond Myklebust577b4232013-04-08 21:38:12 -0400250
Anna Schumaker41d8d5b2014-05-06 09:12:40 -0400251extern const struct nfs_pageio_ops nfs_pgio_rw_ops;
Weston Andros Adamson1e7f3a42014-06-09 11:48:33 -0400252struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *);
253void nfs_pgio_header_free(struct nfs_pgio_header *);
Anna Schumakeref2c4882014-05-06 09:12:36 -0400254int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *);
Peng Tao46a5ab42014-06-13 23:02:25 +0800255int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr,
256 struct rpc_cred *cred, const struct nfs_rpc_ops *rpc_ops,
257 const struct rpc_call_ops *call_ops, int how, int flags);
Weston Andros Adamsond4581382014-07-11 10:20:48 -0400258void nfs_free_request(struct nfs_page *req);
Peng Tao48d635f2014-11-10 08:35:35 +0800259struct nfs_pgio_mirror *
260nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc);
Anna Schumaker00bfa302014-05-06 09:12:29 -0400261
Peng Tao47af81f2014-11-10 08:35:34 +0800262static inline bool nfs_pgio_has_mirroring(struct nfs_pageio_descriptor *desc)
263{
264 WARN_ON_ONCE(desc->pg_mirror_count < 1);
265 return desc->pg_mirror_count > 1;
266}
267
Trond Myklebust138a2932015-10-01 17:17:06 -0400268static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1,
269 const struct nfs_open_context *ctx2)
270{
271 return ctx1->cred == ctx2->cred && ctx1->state == ctx2->state;
272}
273
David Howellsf7b422b2006-06-09 09:34:33 -0400274/* nfs2xdr.c */
Christoph Hellwig499b4982017-05-12 15:36:49 +0200275extern const struct rpc_procinfo nfs_procedures[];
Chuck Lever573c4e12010-12-14 14:58:11 +0000276extern int nfs2_decode_dirent(struct xdr_stream *,
Benjamin Coddingtona7a3b1e2017-06-20 08:33:44 -0400277 struct nfs_entry *, bool);
David Howellsf7b422b2006-06-09 09:34:33 -0400278
279/* nfs3xdr.c */
Christoph Hellwig499b4982017-05-12 15:36:49 +0200280extern const struct rpc_procinfo nfs3_procedures[];
Chuck Lever573c4e12010-12-14 14:58:11 +0000281extern int nfs3_decode_dirent(struct xdr_stream *,
Benjamin Coddingtona7a3b1e2017-06-20 08:33:44 -0400282 struct nfs_entry *, bool);
David Howellsf7b422b2006-06-09 09:34:33 -0400283
284/* nfs4xdr.c */
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400285#if IS_ENABLED(CONFIG_NFS_V4)
Chuck Lever573c4e12010-12-14 14:58:11 +0000286extern int nfs4_decode_dirent(struct xdr_stream *,
Benjamin Coddingtona7a3b1e2017-06-20 08:33:44 -0400287 struct nfs_entry *, bool);
David Howells7d4e2742006-08-22 20:06:07 -0400288#endif
Alexandros Batsakis2449ea22009-12-05 13:36:55 -0500289#ifdef CONFIG_NFS_V4_1
290extern const u32 nfs41_maxread_overhead;
291extern const u32 nfs41_maxwrite_overhead;
Andy Adamsonf1c097b2013-06-25 19:02:53 -0400292extern const u32 nfs41_maxgetdevinfo_overhead;
Alexandros Batsakis2449ea22009-12-05 13:36:55 -0500293#endif
David Howellsf7b422b2006-06-09 09:34:33 -0400294
295/* nfs4proc.c */
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400296#if IS_ENABLED(CONFIG_NFS_V4)
Christoph Hellwig499b4982017-05-12 15:36:49 +0200297extern const struct rpc_procinfo nfs4_procedures[];
Andrew Mortond75d5412006-06-25 02:41:26 -0700298#endif
David Howellsf7b422b2006-06-09 09:34:33 -0400299
Anna Schumaker694e0962013-11-13 12:29:08 -0500300#ifdef CONFIG_NFS_V4_SECURITY_LABEL
301extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags);
Kinglong Meea49c2692015-07-27 15:31:38 +0800302static inline struct nfs4_label *
303nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
304{
305 if (!dst || !src)
306 return NULL;
307
308 if (src->len > NFS4_MAXLABELLEN)
309 return NULL;
310
311 dst->lfs = src->lfs;
312 dst->pi = src->pi;
313 dst->len = src->len;
314 memcpy(dst->label, src->label, src->len);
315
316 return dst;
317}
Anna Schumaker694e0962013-11-13 12:29:08 -0500318static inline void nfs4_label_free(struct nfs4_label *label)
319{
320 if (label) {
321 kfree(label->label);
322 kfree(label);
323 }
324 return;
325}
Trond Myklebustfd1defc2014-02-06 14:38:53 -0500326
327static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
328{
329 if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL))
330 nfsi->cache_validity |= NFS_INO_INVALID_LABEL;
331}
Anna Schumaker694e0962013-11-13 12:29:08 -0500332#else
333static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; }
334static inline void nfs4_label_free(void *label) {}
Trond Myklebustfd1defc2014-02-06 14:38:53 -0500335static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
336{
337}
Kinglong Meea49c2692015-07-27 15:31:38 +0800338static inline struct nfs4_label *
339nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
340{
341 return NULL;
342}
Anna Schumaker694e0962013-11-13 12:29:08 -0500343#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
344
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400345/* proc.c */
346void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
Chuck Lever8cab4c32012-05-21 22:45:59 -0400347extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
Trond Myklebust5c6e5b62016-06-22 14:13:12 -0400348 const struct nfs_client_initdata *);
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400349
Trond Myklebust979df722006-07-25 11:28:19 -0400350/* dir.c */
Trond Myklebust1bcf4c52016-12-02 09:15:37 -0500351extern void nfs_advise_use_readdirplus(struct inode *dir);
Trond Myklebust311324a2014-02-07 17:02:08 -0500352extern void nfs_force_use_readdirplus(struct inode *dir);
Dave Chinner1ab6c492013-08-28 10:18:09 +1000353extern unsigned long nfs_access_cache_count(struct shrinker *shrink,
354 struct shrink_control *sc);
355extern unsigned long nfs_access_cache_scan(struct shrinker *shrink,
356 struct shrink_control *sc);
Bryan Schumaker597d9282012-07-16 16:39:10 -0400357struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
358int nfs_create(struct inode *, struct dentry *, umode_t, bool);
359int nfs_mkdir(struct inode *, struct dentry *, umode_t);
360int nfs_rmdir(struct inode *, struct dentry *);
361int nfs_unlink(struct inode *, struct dentry *);
362int nfs_symlink(struct inode *, struct dentry *, const char *);
363int nfs_link(struct dentry *, struct inode *, struct dentry *);
364int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
Miklos Szeredi1cd66c92016-09-27 11:03:58 +0200365int nfs_rename(struct inode *, struct dentry *,
366 struct inode *, struct dentry *, unsigned int);
Trond Myklebust979df722006-07-25 11:28:19 -0400367
Bryan Schumakerce4ef7c2012-07-16 16:39:15 -0400368/* file.c */
Christoph Hellwig4ff79bc2016-03-02 17:35:54 +0100369int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync);
Bryan Schumakerce4ef7c2012-07-16 16:39:15 -0400370loff_t nfs_file_llseek(struct file *, loff_t, int);
Al Viro3aa2d192014-04-02 20:14:12 -0400371ssize_t nfs_file_read(struct kiocb *, struct iov_iter *);
Bryan Schumakerce4ef7c2012-07-16 16:39:15 -0400372int nfs_file_mmap(struct file *, struct vm_area_struct *);
Al Viroedaf4362014-04-03 14:07:25 -0400373ssize_t nfs_file_write(struct kiocb *, struct iov_iter *);
Bryan Schumakerce4ef7c2012-07-16 16:39:15 -0400374int nfs_file_release(struct inode *, struct file *);
375int nfs_lock(struct file *, int, struct file_lock *);
376int nfs_flock(struct file *, int, struct file_lock *);
Bryan Schumakerce4ef7c2012-07-16 16:39:15 -0400377int nfs_check_flags(int);
Bryan Schumakerce4ef7c2012-07-16 16:39:15 -0400378
David Howellsf7b422b2006-06-09 09:34:33 -0400379/* inode.c */
Trond Myklebust57460062008-02-19 20:04:22 -0500380extern struct workqueue_struct *nfsiod_workqueue;
David Howellsf7b422b2006-06-09 09:34:33 -0400381extern struct inode *nfs_alloc_inode(struct super_block *sb);
382extern void nfs_destroy_inode(struct inode *);
Christoph Hellwiga9185b42010-03-05 09:21:37 +0100383extern int nfs_write_inode(struct inode *, struct writeback_control *);
Trond Myklebusteed99352012-12-14 14:36:36 -0500384extern int nfs_drop_inode(struct inode *);
Bryan Schumaker19d87ca2012-07-30 16:05:21 -0400385extern void nfs_clear_inode(struct inode *);
Al Virob57922d2010-06-07 14:34:48 -0400386extern void nfs_evict_inode(struct inode *);
Trond Myklebustf41f7412008-06-11 17:39:04 -0400387void nfs_zap_acl_cache(struct inode *inode);
Trond Myklebust61540bf2016-12-08 18:18:38 -0500388extern bool nfs_check_cache_invalid(struct inode *, unsigned long);
Peter Zijlstradfd01f02015-12-13 22:11:16 +0100389extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode);
Benjamin Coddington210c7c12016-01-06 10:40:18 -0500390extern int nfs_wait_atomic_killable(atomic_t *p);
David Howellsf7b422b2006-06-09 09:34:33 -0400391
392/* super.c */
Bryan Schumaker6a744902012-07-30 16:05:20 -0400393extern const struct super_operations nfs_sops;
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400394extern struct file_system_type nfs_fs_type;
David Howells54ceac42006-08-22 20:06:13 -0400395extern struct file_system_type nfs_xdev_fs_type;
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400396#if IS_ENABLED(CONFIG_NFS_V4)
David Howells54ceac42006-08-22 20:06:13 -0400397extern struct file_system_type nfs4_xdev_fs_type;
398extern struct file_system_type nfs4_referral_fs_type;
David Howellsf7b422b2006-06-09 09:34:33 -0400399#endif
Weston Andros Adamson4d4b69d2013-10-18 15:15:19 -0400400bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t);
Bryan Schumakerff9099f22012-07-30 16:05:18 -0400401struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *,
402 struct nfs_subversion *);
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400403int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
404int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
Bryan Schumakerab7017a2012-07-30 16:05:16 -0400405struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *,
406 struct nfs_mount_info *, struct nfs_subversion *);
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400407struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *);
408struct dentry * nfs_xdev_mount_common(struct file_system_type *, int,
409 const char *, struct nfs_mount_info *);
410void nfs_kill_super(struct super_block *);
411void nfs_fill_super(struct super_block *, struct nfs_mount_info *);
Dominik Hackl4ebd9ab2006-07-02 17:29:26 +0200412
David Howellsf7b422b2006-06-09 09:34:33 -0400413extern struct rpc_stat nfs_rpcstat;
Dominik Hackl4ebd9ab2006-07-02 17:29:26 +0200414
David Howellsf7b422b2006-06-09 09:34:33 -0400415extern int __init register_nfs_fs(void);
416extern void __exit unregister_nfs_fs(void);
Trond Myklebustea7c38f2015-02-05 15:13:24 -0500417extern bool nfs_sb_active(struct super_block *sb);
Trond Myklebust1daef0a2008-07-27 18:19:01 -0400418extern void nfs_sb_deactive(struct super_block *sb);
David Howellsf7b422b2006-06-09 09:34:33 -0400419
Trond Myklebusta5864c92016-06-03 17:07:19 -0400420/* io.c */
421extern void nfs_start_io_read(struct inode *inode);
422extern void nfs_end_io_read(struct inode *inode);
423extern void nfs_start_io_write(struct inode *inode);
424extern void nfs_end_io_write(struct inode *inode);
425extern void nfs_start_io_direct(struct inode *inode);
426extern void nfs_end_io_direct(struct inode *inode);
427
Trond Myklebust651b0e72016-06-25 17:24:46 -0400428static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi)
429{
430 return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0;
431}
432
David Howellsf7b422b2006-06-09 09:34:33 -0400433/* namespace.c */
Ben Hutchings97a54862012-10-21 19:23:52 +0100434#define NFS_PATH_CANONICAL 1
Al Virob514f872011-03-16 06:26:11 -0400435extern char *nfs_path(char **p, struct dentry *dentry,
Ben Hutchings97a54862012-10-21 19:23:52 +0100436 char *buffer, ssize_t buflen, unsigned flags);
David Howells36d43a42011-01-14 18:45:42 +0000437extern struct vfsmount *nfs_d_automount(struct path *path);
Bryan Schumaker281cad42012-04-27 13:27:45 -0400438struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *,
439 struct nfs_fh *, struct nfs_fattr *);
440struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *,
441 struct nfs_fattr *, rpc_authflavor_t);
David Howellsf7b422b2006-06-09 09:34:33 -0400442
David Howells54ceac42006-08-22 20:06:13 -0400443/* getroot.c */
Al Viro0d5839a2011-03-16 05:27:27 -0400444extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *,
445 const char *);
Bryan Schumaker89d77c82012-07-30 16:05:25 -0400446#if IS_ENABLED(CONFIG_NFS_V4)
Al Viro0d5839a2011-03-16 05:27:27 -0400447extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *,
448 const char *);
David Howells54ceac42006-08-22 20:06:13 -0400449
Trond Myklebust5e6b1992013-09-07 12:58:57 -0400450extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool);
David Howells7d4e2742006-08-22 20:06:07 -0400451#endif
David Howellsf7b422b2006-06-09 09:34:33 -0400452
Fred Isaman061ae2e2012-04-20 14:47:48 -0400453struct nfs_pgio_completion_ops;
Andy Adamsonf11c88a2009-04-01 09:22:25 -0400454/* read.c */
Fred Isaman584aa812012-04-20 14:47:51 -0400455extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
Christoph Hellwigfab5fc22014-04-16 15:07:22 +0200456 struct inode *inode, bool force_mds,
Fred Isaman584aa812012-04-20 14:47:51 -0400457 const struct nfs_pgio_completion_ops *compl_ops);
Andy Adamsonf11c88a2009-04-01 09:22:25 -0400458extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
Trond Myklebust493292d2011-07-13 15:58:28 -0400459extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
Trond Myklebuste885de12011-06-10 13:30:23 -0400460
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400461/* super.c */
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400462void nfs_umount_begin(struct super_block *);
463int nfs_statfs(struct dentry *, struct kstatfs *);
464int nfs_show_options(struct seq_file *, struct dentry *);
465int nfs_show_devname(struct seq_file *, struct dentry *);
466int nfs_show_path(struct seq_file *, struct dentry *);
467int nfs_show_stats(struct seq_file *, struct dentry *);
Bryan Schumakerfbdefd62012-07-16 16:39:20 -0400468int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
469
Andy Adamsondef6ed72009-04-01 09:22:26 -0400470/* write.c */
Fred Isaman1763da12012-04-20 14:47:57 -0400471extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
Christoph Hellwiga20c93e2014-04-16 15:07:21 +0200472 struct inode *inode, int ioflags, bool force_mds,
Fred Isaman1763da12012-04-20 14:47:57 -0400473 const struct nfs_pgio_completion_ops *compl_ops);
Trond Myklebustdce81292011-07-13 15:59:19 -0400474extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
Fred Isaman0b7c0152012-04-20 14:47:39 -0400475extern void nfs_commit_free(struct nfs_commit_data *p);
Andy Adamsondef6ed72009-04-01 09:22:26 -0400476extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
Fred Isaman0b7c0152012-04-20 14:47:39 -0400477extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
478extern int nfs_initiate_commit(struct rpc_clnt *clnt,
479 struct nfs_commit_data *data,
Peng Taoc36aae92014-06-09 07:10:14 +0800480 const struct nfs_rpc_ops *nfs_ops,
Fred Isamane0c2b382011-03-23 13:27:53 +0000481 const struct rpc_call_ops *call_ops,
Andy Adamson9f0ec1762012-04-27 17:53:44 -0400482 int how, int flags);
Fred Isaman0b7c0152012-04-20 14:47:39 -0400483extern void nfs_init_commit(struct nfs_commit_data *data,
Fred Isamane0c2b382011-03-23 13:27:53 +0000484 struct list_head *head,
Fred Isamanf453a542012-04-20 14:47:54 -0400485 struct pnfs_layout_segment *lseg,
486 struct nfs_commit_info *cinfo);
Fred Isaman1763da12012-04-20 14:47:57 -0400487int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
488 struct nfs_commit_info *cinfo, int max);
Anna Schumakerce595152014-05-06 09:12:34 -0400489unsigned long nfs_reqs_to_commit(struct nfs_commit_info *);
Fred Isaman1763da12012-04-20 14:47:57 -0400490int nfs_scan_commit(struct inode *inode, struct list_head *dst,
491 struct nfs_commit_info *cinfo);
492void nfs_mark_request_commit(struct nfs_page *req,
493 struct pnfs_layout_segment *lseg,
Weston Andros Adamsonb57ff132014-09-05 18:20:21 -0400494 struct nfs_commit_info *cinfo,
495 u32 ds_commit_idx);
Weston Andros Adamsonc65e6252014-06-09 11:48:36 -0400496int nfs_write_need_commit(struct nfs_pgio_header *);
Trond Myklebusta08a8cd2015-02-26 17:36:09 -0500497void nfs_writeback_update_inode(struct nfs_pgio_header *hdr);
Fred Isaman1763da12012-04-20 14:47:57 -0400498int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
499 int how, struct nfs_commit_info *cinfo);
Fred Isamane0c2b382011-03-23 13:27:53 +0000500void nfs_retry_commit(struct list_head *page_list,
Fred Isamanea2cf222012-04-20 14:47:53 -0400501 struct pnfs_layout_segment *lseg,
Weston Andros Adamsonb57ff132014-09-05 18:20:21 -0400502 struct nfs_commit_info *cinfo,
503 u32 ds_commit_idx);
Fred Isaman0b7c0152012-04-20 14:47:39 -0400504void nfs_commitdata_release(struct nfs_commit_data *data);
Anna Schumaker6272dcc2016-01-15 16:54:15 -0500505void nfs_request_add_commit_list(struct nfs_page *req,
Fred Isamanea2cf222012-04-20 14:47:53 -0400506 struct nfs_commit_info *cinfo);
Trond Myklebust86d80f92015-07-31 16:24:30 -0400507void nfs_request_add_commit_list_locked(struct nfs_page *req,
508 struct list_head *dst,
509 struct nfs_commit_info *cinfo);
Fred Isamanea2cf222012-04-20 14:47:53 -0400510void nfs_request_remove_commit_list(struct nfs_page *req,
511 struct nfs_commit_info *cinfo);
512void nfs_init_cinfo(struct nfs_commit_info *cinfo,
513 struct inode *inode,
514 struct nfs_direct_req *dreq);
Andy Adamsondc248262013-08-14 11:59:16 -0400515int nfs_key_timeout_notify(struct file *filp, struct inode *inode);
Scott Mayhewce52914e2016-06-07 15:14:48 -0400516bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode);
Weston Andros Adamsona7d42dd2014-09-19 10:55:07 -0400517void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio);
Fred Isamane0c2b382011-03-23 13:27:53 +0000518
Trond Myklebust837bb1d2016-06-25 18:12:03 -0400519int nfs_filemap_write_and_wait_range(struct address_space *mapping,
520 loff_t lstart, loff_t lend);
521
Trond Myklebusta5314a72016-06-01 21:42:32 -0400522#ifdef CONFIG_NFS_V4_1
523static inline
524void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
525{
526 int i;
527
528 for (i = 0; i < cinfo->nbuckets; i++)
529 cinfo->buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW;
530}
531#else
532static inline
533void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
534{
535}
536#endif
537
Trond Myklebust074cc1d2009-08-10 08:54:13 -0400538#ifdef CONFIG_MIGRATION
539extern int nfs_migrate_page(struct address_space *,
Mel Gormana6bc32b2012-01-12 17:19:43 -0800540 struct page *, struct page *, enum migrate_mode);
Trond Myklebust074cc1d2009-08-10 08:54:13 -0400541#endif
Andy Adamsondef6ed72009-04-01 09:22:26 -0400542
Trond Myklebust8fc3c382016-06-01 21:32:24 -0400543static inline int
544nfs_write_verifier_cmp(const struct nfs_write_verifier *v1,
545 const struct nfs_write_verifier *v2)
546{
547 return memcmp(v1->data, v2->data, sizeof(v1->data));
548}
549
Jeff Layton0e862a42014-03-17 07:06:55 -0400550/* unlink.c */
551extern struct rpc_task *
552nfs_async_rename(struct inode *old_dir, struct inode *new_dir,
553 struct dentry *old_dentry, struct dentry *new_dentry,
554 void (*complete)(struct rpc_task *, struct nfs_renamedata *));
555extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry);
556
Fred Isaman1763da12012-04-20 14:47:57 -0400557/* direct.c */
558void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
559 struct nfs_direct_req *dreq);
Peng Tao62965562012-09-25 14:55:57 +0800560extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
Fred Isaman1763da12012-04-20 14:47:57 -0400561
Andy Adamsoncccef3b2009-04-01 09:22:03 -0400562/* nfs4proc.c */
Chuck Lever8cab4c32012-05-21 22:45:59 -0400563extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
Trond Myklebust5c6e5b62016-06-22 14:13:12 -0400564 const struct nfs_client_initdata *);
Chuck Lever05f4c352012-09-14 17:24:32 -0400565extern int nfs40_walk_client_list(struct nfs_client *clp,
566 struct nfs_client **result,
567 struct rpc_cred *cred);
568extern int nfs41_walk_client_list(struct nfs_client *clp,
569 struct nfs_client **result,
570 struct rpc_cred *cred);
Andy Adamson04fa2c62016-09-09 09:22:29 -0400571extern int nfs4_test_session_trunk(struct rpc_clnt *,
572 struct rpc_xprt *,
573 void *);
Andy Adamsoncccef3b2009-04-01 09:22:03 -0400574
Trond Myklebustea7c38f2015-02-05 15:13:24 -0500575static inline struct inode *nfs_igrab_and_active(struct inode *inode)
576{
577 inode = igrab(inode);
578 if (inode != NULL && !nfs_sb_active(inode->i_sb)) {
579 iput(inode);
580 inode = NULL;
581 }
582 return inode;
583}
584
585static inline void nfs_iput_and_deactive(struct inode *inode)
586{
587 if (inode != NULL) {
588 struct super_block *sb = inode->i_sb;
589
590 iput(inode);
591 nfs_sb_deactive(sb);
592 }
593}
594
Andy Adamson557134a2009-04-01 09:21:53 -0400595/*
David Howellsf7b422b2006-06-09 09:34:33 -0400596 * Determine the device name as a string
597 */
Al Virob514f872011-03-16 06:26:11 -0400598static inline char *nfs_devname(struct dentry *dentry,
David Howells54ceac42006-08-22 20:06:13 -0400599 char *buffer, ssize_t buflen)
David Howellsf7b422b2006-06-09 09:34:33 -0400600{
Al Virob514f872011-03-16 06:26:11 -0400601 char *dummy;
Ben Hutchings97a54862012-10-21 19:23:52 +0100602 return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
David Howellsf7b422b2006-06-09 09:34:33 -0400603}
604
605/*
606 * Determine the actual block size (and log2 thereof)
607 */
608static inline
609unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
610{
611 /* make sure blocksize is a power of two */
612 if ((bsize & (bsize - 1)) || nrbitsp) {
613 unsigned char nrbits;
614
615 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
616 ;
617 bsize = 1 << nrbits;
618 if (nrbitsp)
619 *nrbitsp = nrbits;
620 }
621
622 return bsize;
623}
624
625/*
626 * Calculate the number of 512byte blocks used.
627 */
Chuck Lever9eaa67c2007-07-01 12:12:19 -0400628static inline blkcnt_t nfs_calc_block_size(u64 tsize)
David Howellsf7b422b2006-06-09 09:34:33 -0400629{
Chuck Lever9eaa67c2007-07-01 12:12:19 -0400630 blkcnt_t used = (tsize + 511) >> 9;
David Howellsf7b422b2006-06-09 09:34:33 -0400631 return (used > ULONG_MAX) ? ULONG_MAX : used;
632}
633
634/*
635 * Compute and set NFS server blocksize
636 */
637static inline
638unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
639{
640 if (bsize < NFS_MIN_FILE_IO_SIZE)
641 bsize = NFS_DEF_FILE_IO_SIZE;
642 else if (bsize >= NFS_MAX_FILE_IO_SIZE)
643 bsize = NFS_MAX_FILE_IO_SIZE;
644
645 return nfs_block_bits(bsize, nrbitsp);
646}
647
648/*
649 * Determine the maximum file size for a superblock
650 */
651static inline
652void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
653{
654 sb->s_maxbytes = (loff_t)maxfilesize;
655 if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
656 sb->s_maxbytes = MAX_LFS_FILESIZE;
657}
Trond Myklebust49a70f2782006-12-05 00:35:38 -0500658
659/*
Tom Haynesd15bc382015-02-13 13:19:53 -0800660 * Record the page as unstable and mark its inode as dirty.
661 */
662static inline
Trond Myklebust86d80f92015-07-31 16:24:30 -0400663void nfs_mark_page_unstable(struct page *page, struct nfs_commit_info *cinfo)
Tom Haynesd15bc382015-02-13 13:19:53 -0800664{
Trond Myklebust86d80f92015-07-31 16:24:30 -0400665 if (!cinfo->dreq) {
666 struct inode *inode = page_file_mapping(page)->host;
Tom Haynesd15bc382015-02-13 13:19:53 -0800667
Mel Gorman11fb9982016-07-28 15:46:20 -0700668 inc_node_page_state(page, NR_UNSTABLE_NFS);
Trond Myklebust86d80f92015-07-31 16:24:30 -0400669 inc_wb_stat(&inode_to_bdi(inode)->wb, WB_RECLAIMABLE);
670 __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
671 }
Tom Haynesd15bc382015-02-13 13:19:53 -0800672}
673
674/*
Trond Myklebust49a70f2782006-12-05 00:35:38 -0500675 * Determine the number of bytes of data the page contains
676 */
677static inline
678unsigned int nfs_page_length(struct page *page)
679{
Mel Gormand56b4dd2012-07-31 16:45:06 -0700680 loff_t i_size = i_size_read(page_file_mapping(page)->host);
Trond Myklebust49a70f2782006-12-05 00:35:38 -0500681
682 if (i_size > 0) {
Huang Ying8cd79782016-10-07 17:00:24 -0700683 pgoff_t index = page_index(page);
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300684 pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT;
Huang Ying8cd79782016-10-07 17:00:24 -0700685 if (index < end_index)
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300686 return PAGE_SIZE;
Huang Ying8cd79782016-10-07 17:00:24 -0700687 if (index == end_index)
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300688 return ((i_size - 1) & ~PAGE_MASK) + 1;
Trond Myklebust49a70f2782006-12-05 00:35:38 -0500689 }
690 return 0;
691}
Trond Myklebust8d5658c2007-04-10 09:26:35 -0400692
693/*
Trond Myklebust0b26a0b2010-11-20 14:26:44 -0500694 * Convert a umode to a dirent->d_type
695 */
696static inline
697unsigned char nfs_umode_to_dtype(umode_t mode)
698{
699 return (mode >> 12) & 15;
700}
701
702/*
Trond Myklebust8d5658c2007-04-10 09:26:35 -0400703 * Determine the number of pages in an array of length 'len' and
704 * with a base offset of 'base'
705 */
706static inline
707unsigned int nfs_page_array_len(unsigned int base, size_t len)
708{
709 return ((unsigned long)len + (unsigned long)base +
710 PAGE_SIZE - 1) >> PAGE_SHIFT;
711}
Trond Myklebust0110ee12009-12-07 09:00:24 -0500712
Trond Myklebust3a1556e2012-04-27 13:48:18 -0400713/*
714 * Convert a struct timespec into a 64-bit change attribute
715 *
716 * This does approximately the same thing as timespec_to_ns(),
717 * but for calculation efficiency, we multiply the seconds by
718 * 1024*1024*1024.
719 */
720static inline
721u64 nfs_timespec_to_change_attr(const struct timespec *ts)
722{
723 return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
724}
Trond Myklebust1264a2f2013-08-12 16:06:31 -0400725
726#ifdef CONFIG_CRC32
727/**
728 * nfs_fhandle_hash - calculate the crc32 hash for the filehandle
729 * @fh - pointer to filehandle
730 *
731 * returns a crc32 hash for the filehandle that is compatible with
732 * the one displayed by "wireshark".
733 */
734static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
735{
736 return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size);
737}
Olga Kornievskaia48c95792015-11-24 13:29:41 -0500738static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid)
739{
740 return ~crc32_le(0xFFFFFFFF, &stateid->other[0],
741 NFS4_STATEID_OTHER_SIZE);
742}
Trond Myklebust1264a2f2013-08-12 16:06:31 -0400743#else
744static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
745{
746 return 0;
747}
Olga Kornievskaia48c95792015-11-24 13:29:41 -0500748static inline u32 nfs_stateid_hash(nfs4_stateid *stateid)
749{
750 return 0;
751}
Trond Myklebust1264a2f2013-08-12 16:06:31 -0400752#endif
Peng Tao0bcbf032015-12-05 15:57:31 +0800753
754static inline bool nfs_error_is_fatal(int err)
755{
756 switch (err) {
757 case -ERESTARTSYS:
Trond Myklebust54551d82017-04-26 12:21:49 -0400758 case -EACCES:
759 case -EDQUOT:
760 case -EFBIG:
Peng Tao0bcbf032015-12-05 15:57:31 +0800761 case -EIO:
762 case -ENOSPC:
763 case -EROFS:
Trond Myklebust54551d82017-04-26 12:21:49 -0400764 case -ESTALE:
Peng Tao0bcbf032015-12-05 15:57:31 +0800765 case -E2BIG:
766 return true;
767 default:
768 return false;
769 }
770}
NeilBrownbf4b4902017-09-11 13:15:50 +1000771
772static inline void nfs_context_set_write_error(struct nfs_open_context *ctx, int error)
773{
774 ctx->error = error;
775 smp_wmb();
776 set_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags);
777}