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Ricardo Labiaga85e174b2010-10-20 00:17:58 -04001/*
2 * pNFS client data structures.
3 *
4 * Copyright (c) 2002
5 * The Regents of the University of Michigan
6 * All Rights Reserved
7 *
8 * Dean Hildebrand <dhildebz@umich.edu>
9 *
10 * Permission is granted to use, copy, create derivative works, and
11 * redistribute this software and such derivative works for any purpose,
12 * so long as the name of the University of Michigan is not used in
13 * any advertising or publicity pertaining to the use or distribution
14 * of this software without specific, written prior authorization. If
15 * the above copyright notice or any other identification of the
16 * University of Michigan is included in any copy of any portion of
17 * this software, then the disclaimer below must also be included.
18 *
19 * This software is provided as is, without representation or warranty
20 * of any kind either express or implied, including without limitation
21 * the implied warranties of merchantability, fitness for a particular
22 * purpose, or noninfringement. The Regents of the University of
23 * Michigan shall not be liable for any damages, including special,
24 * indirect, incidental, or consequential damages, with respect to any
25 * claim arising out of or in connection with the use of the software,
26 * even if it has been or is hereafter advised of the possibility of
27 * such damages.
28 */
29
30#ifndef FS_NFS_PNFS_H
31#define FS_NFS_PNFS_H
32
Benny Halevy45df3c82011-05-05 08:28:46 +030033#include <linux/nfs_fs.h>
Fred Isaman94ad1c82011-03-01 01:34:14 +000034#include <linux/nfs_page.h>
Weston Andros Adamsone6cf82d2014-07-17 20:42:18 -040035#include <linux/workqueue.h>
Fred Isaman94ad1c82011-03-01 01:34:14 +000036
Fred Isaman4541d162011-01-06 11:36:23 +000037enum {
38 NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */
Fred Isamanf7e89172011-01-06 11:36:32 +000039 NFS_LSEG_ROC, /* roc bit received from server */
Peng Taoa9bae562011-07-30 20:52:33 -040040 NFS_LSEG_LAYOUTCOMMIT, /* layoutcommit bit set for layoutcommit */
Peng Tao016256d2014-09-06 00:53:23 +080041 NFS_LSEG_LAYOUTRETURN, /* layoutreturn bit set for layoutreturn */
Fred Isaman4541d162011-01-06 11:36:23 +000042};
43
Peng Tao875ae062014-05-29 21:06:57 +080044/* Individual ip address */
45struct nfs4_pnfs_ds_addr {
46 struct sockaddr_storage da_addr;
47 size_t da_addrlen;
48 struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */
49 char *da_remotestr; /* human readable addr+port */
50};
51
52struct nfs4_pnfs_ds {
53 struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */
54 char *ds_remotestr; /* comma sep list of addrs */
55 struct list_head ds_addrs;
56 struct nfs_client *ds_clp;
57 atomic_t ds_count;
58 unsigned long ds_state;
59#define NFS4DS_CONNECTING 0 /* ds is establishing connection */
60};
61
Andy Adamson974cec82010-10-20 00:18:02 -040062struct pnfs_layout_segment {
Fred Isaman566052c2011-01-06 11:36:20 +000063 struct list_head pls_list;
Peng Taoa9bae562011-07-30 20:52:33 -040064 struct list_head pls_lc_list;
Fred Isaman566052c2011-01-06 11:36:20 +000065 struct pnfs_layout_range pls_range;
Fred Isaman4541d162011-01-06 11:36:23 +000066 atomic_t pls_refcount;
67 unsigned long pls_flags;
Fred Isaman566052c2011-01-06 11:36:20 +000068 struct pnfs_layout_hdr *pls_layout;
Weston Andros Adamsone6cf82d2014-07-17 20:42:18 -040069 struct work_struct pls_work;
Andy Adamson974cec82010-10-20 00:18:02 -040070};
71
Andy Adamson64419a92011-03-01 01:34:16 +000072enum pnfs_try_status {
73 PNFS_ATTEMPTED = 0,
74 PNFS_NOT_ATTEMPTED = 1,
75};
76
Ricardo Labiaga85e174b2010-10-20 00:17:58 -040077#ifdef CONFIG_NFS_V4_1
78
79#define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4"
80
Peng Tao39280a52014-05-30 18:15:55 +080081/*
82 * Default data server connection timeout and retrans vaules.
83 * Set by module parameters dataserver_timeo and dataserver_retrans.
84 */
85#define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */
86#define NFS4_DEF_DS_RETRANS 5
87
88/* error codes for internal use */
89#define NFS4ERR_RESET_TO_MDS 12001
90#define NFS4ERR_RESET_TO_PNFS 12002
91
Benny Halevye5e94012010-10-20 00:18:01 -040092enum {
93 NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */
94 NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */
Fred Isaman43f1b3d2011-01-06 11:36:30 +000095 NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */
Fred Isamanf7e89172011-01-06 11:36:32 +000096 NFS_LAYOUT_ROC, /* some lseg had roc bit set */
Trond Myklebustd527e5c2012-10-11 13:43:38 -040097 NFS_LAYOUT_RETURN, /* Return this layout ASAP */
Christoph Hellwig47abade2014-08-21 11:09:22 -050098 NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */
Peng Tao9bf87482014-08-22 17:37:41 +080099 NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */
Benny Halevye5e94012010-10-20 00:18:01 -0400100};
101
Benny Halevy8a1636c2010-07-14 15:43:57 -0400102enum layoutdriver_policy_flags {
Peng Tao88ac8152014-09-12 11:04:10 +0800103 /* Should the pNFS client commit and return the layout upon truncate to
104 * a smaller size */
Benny Halevy8a1636c2010-07-14 15:43:57 -0400105 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0,
Boaz Harroshfe0fe832012-01-06 09:31:20 +0200106 PNFS_LAYOUTRET_ON_ERROR = 1 << 1,
Christoph Hellwig612aa982014-09-10 08:23:30 -0700107 PNFS_READ_WHOLE_PAGE = 1 << 2,
Benny Halevy8a1636c2010-07-14 15:43:57 -0400108};
109
Benny Halevy1775bc32011-05-20 13:47:33 +0200110struct nfs4_deviceid_node;
111
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400112/* Per-layout driver specific registration structure */
113struct pnfs_layoutdriver_type {
Fred Isaman02c35fc2010-10-20 00:17:59 -0400114 struct list_head pnfs_tblid;
115 const u32 id;
116 const char *name;
117 struct module *owner;
Benny Halevy8a1636c2010-07-14 15:43:57 -0400118 unsigned flags;
Christoph Hellwig661373b2014-09-02 21:27:57 -0700119 unsigned max_deviceinfo_size;
Benny Halevy636fb9c2011-05-22 19:51:33 +0300120
Benny Halevy738fd0f32011-07-30 20:52:36 -0400121 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *);
122 int (*clear_layoutdriver) (struct nfs_server *);
123
Benny Halevy636fb9c2011-05-22 19:51:33 +0300124 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags);
125 void (*free_layout_hdr) (struct pnfs_layout_hdr *);
126
Trond Myklebusta75b9df2011-05-11 18:00:51 -0400127 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags);
Andy Adamsonb1f69b72010-10-20 00:18:03 -0400128 void (*free_lseg) (struct pnfs_layout_segment *lseg);
Fred Isaman94ad1c82011-03-01 01:34:14 +0000129
Christoph Hellwigc88953d2014-09-10 08:23:31 -0700130 void (*return_range) (struct pnfs_layout_hdr *lo,
131 struct pnfs_layout_range *range);
132
Fred Isaman94ad1c82011-03-01 01:34:14 +0000133 /* test for nfs page cache coalescing */
Trond Myklebust1751c362011-06-10 13:30:23 -0400134 const struct nfs_pageio_ops *pg_read_ops;
135 const struct nfs_pageio_ops *pg_write_ops;
Andy Adamson64419a92011-03-01 01:34:16 +0000136
Fred Isamanea2cf222012-04-20 14:47:53 -0400137 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode);
Trond Myklebust8dd37752012-03-15 17:16:40 -0400138 void (*mark_request_commit) (struct nfs_page *req,
Fred Isamanea2cf222012-04-20 14:47:53 -0400139 struct pnfs_layout_segment *lseg,
140 struct nfs_commit_info *cinfo);
141 void (*clear_request_commit) (struct nfs_page *req,
142 struct nfs_commit_info *cinfo);
143 int (*scan_commit_lists) (struct nfs_commit_info *cinfo,
144 int max);
Fred Isaman1763da12012-04-20 14:47:57 -0400145 void (*recover_commit_reqs) (struct list_head *list,
146 struct nfs_commit_info *cinfo);
Weston Andros Adamson02d14262014-07-17 20:42:17 -0400147 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo,
148 struct page *page);
Fred Isamanea2cf222012-04-20 14:47:53 -0400149 int (*commit_pagelist)(struct inode *inode,
150 struct list_head *mds_pages,
151 int how,
152 struct nfs_commit_info *cinfo);
Fred Isamana861a1e2011-03-23 13:27:51 +0000153
Andy Adamson64419a92011-03-01 01:34:16 +0000154 /*
155 * Return PNFS_ATTEMPTED to indicate the layout code has attempted
156 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS
157 */
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -0400158 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *);
159 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int);
Benny Halevy1775bc32011-05-20 13:47:33 +0200160
161 void (*free_deviceid_node) (struct nfs4_deviceid_node *);
Christoph Hellwig661373b2014-09-02 21:27:57 -0700162 struct nfs4_deviceid_node * (*alloc_deviceid_node)
163 (struct nfs_server *server, struct pnfs_device *pdev,
164 gfp_t gfp_flags);
Andy Adamson04a55542011-05-22 19:53:10 +0300165
166 void (*encode_layoutreturn) (struct pnfs_layout_hdr *layoutid,
167 struct xdr_stream *xdr,
168 const struct nfs4_layoutreturn_args *args);
Benny Halevyac7db722011-05-22 19:53:48 +0300169
Andy Adamsondb29c082011-07-30 20:52:38 -0400170 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data);
Christoph Hellwig5f919c92014-08-21 11:09:25 -0500171 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args);
172 void (*encode_layoutcommit) (struct pnfs_layout_hdr *lo,
Benny Halevyac7db722011-05-22 19:53:48 +0300173 struct xdr_stream *xdr,
174 const struct nfs4_layoutcommit_args *args);
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400175};
176
Benny Halevye5e94012010-10-20 00:18:01 -0400177struct pnfs_layout_hdr {
Fred Isamancc6e5342011-01-06 11:36:28 +0000178 atomic_t plh_refcount;
Fred Isamanb7edfaa2011-01-06 11:36:21 +0000179 struct list_head plh_layouts; /* other client layouts */
Trond Myklebustfd9a8d72013-02-12 09:48:42 -0500180 struct list_head plh_bulk_destroy;
Fred Isamanb7edfaa2011-01-06 11:36:21 +0000181 struct list_head plh_segs; /* layout segments list */
Fred Isamanb7edfaa2011-01-06 11:36:21 +0000182 nfs4_stateid plh_stateid;
Fred Isamancf7d63f2011-01-06 11:36:25 +0000183 atomic_t plh_outstanding; /* number of RPCs out */
Fred Isamanf7e89172011-01-06 11:36:32 +0000184 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000185 u32 plh_barrier; /* ignore lower seqids */
Trond Myklebust25c75332012-09-18 17:01:12 -0400186 unsigned long plh_retry_timestamp;
Fred Isaman566052c2011-01-06 11:36:20 +0000187 unsigned long plh_flags;
Peng Tao016256d2014-09-06 00:53:23 +0800188 enum pnfs_iomode plh_return_iomode;
Peng Taoacff58802011-07-30 20:52:31 -0400189 loff_t plh_lwb; /* last write byte for layoutcommit */
Peng Tao9fa40752011-07-30 20:52:32 -0400190 struct rpc_cred *plh_lc_cred; /* layoutcommit cred */
Fred Isamanb7edfaa2011-01-06 11:36:21 +0000191 struct inode *plh_inode;
Benny Halevye5e94012010-10-20 00:18:01 -0400192};
193
Andy Adamsonb1f69b72010-10-20 00:18:03 -0400194struct pnfs_device {
195 struct nfs4_deviceid dev_id;
196 unsigned int layout_type;
197 unsigned int mincount;
Andy Adamsonf1c097b2013-06-25 19:02:53 -0400198 unsigned int maxcount; /* gdia_maxcount */
Andy Adamsonb1f69b72010-10-20 00:18:03 -0400199 struct page **pages;
Andy Adamsonb1f69b72010-10-20 00:18:03 -0400200 unsigned int pgbase;
Andy Adamsonf1c097b2013-06-25 19:02:53 -0400201 unsigned int pglen; /* reply buffer length */
Andy Adamsonb1f69b72010-10-20 00:18:03 -0400202};
203
Andy Adamson7f11d8d2011-07-30 20:52:35 -0400204#define NFS4_PNFS_GETDEVLIST_MAXNUM 16
205
206struct pnfs_devicelist {
207 unsigned int eof;
208 unsigned int num_devs;
209 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM];
210};
211
Fred Isaman02c35fc2010-10-20 00:17:59 -0400212extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *);
213extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *);
214
Andy Adamsonb1f69b72010-10-20 00:18:03 -0400215/* nfs4proc.c */
216extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
Trond Myklebustcd5875f2013-05-20 11:42:54 -0400217 struct pnfs_device *dev,
218 struct rpc_cred *cred);
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -0400219extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags);
Benny Halevycbe82602011-05-22 19:52:37 +0300220extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp);
Andy Adamsonb1f69b72010-10-20 00:18:03 -0400221
222/* pnfs.c */
Trond Myklebust70c3bd22012-09-18 20:51:13 -0400223void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo);
Trond Myklebust9369a432012-09-18 20:57:08 -0400224void pnfs_put_lseg(struct pnfs_layout_segment *lseg);
Trond Myklebust6543f802014-10-08 16:39:12 -0400225void pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg);
Trond Myklebust1751c362011-06-10 13:30:23 -0400226
Benny Halevy738fd0f32011-07-30 20:52:36 -0400227void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32);
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400228void unset_pnfs_layoutdriver(struct nfs_server *);
Trond Myklebustd8007d42011-06-10 13:30:23 -0400229void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
Trond Myklebust493292d2011-07-13 15:58:28 -0400230int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
Peng Tao62965562012-09-25 14:55:57 +0800231void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
232 struct nfs_page *req, u64 wb_size);
Trond Myklebustdce81292011-07-13 15:59:19 -0400233int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc);
Weston Andros Adamsonb4fdac12014-05-15 11:56:43 -0400234size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio,
235 struct nfs_page *prev, struct nfs_page *req);
Peng Tao1b0ae062011-09-22 21:50:12 -0400236void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg);
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -0400237struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp);
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000238void pnfs_free_lseg_list(struct list_head *tmp_list);
Benny Halevye5e94012010-10-20 00:18:01 -0400239void pnfs_destroy_layout(struct nfs_inode *);
Andy Adamson974cec82010-10-20 00:18:02 -0400240void pnfs_destroy_all_layouts(struct nfs_client *);
Trond Myklebustfd9a8d72013-02-12 09:48:42 -0500241int pnfs_destroy_layouts_byfsid(struct nfs_client *clp,
242 struct nfs_fsid *fsid,
243 bool is_recall);
244int pnfs_destroy_layouts_byclid(struct nfs_client *clp,
245 bool is_recall);
Trond Myklebust70c3bd22012-09-18 20:51:13 -0400246void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo);
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000247void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo,
248 const nfs4_stateid *new,
249 bool update_barrier);
Fred Isamanfd6002e2011-01-06 11:36:22 +0000250int pnfs_choose_layoutget_stateid(nfs4_stateid *dst,
251 struct pnfs_layout_hdr *lo,
252 struct nfs4_state *open_state);
Trond Myklebust49a85062012-09-18 20:43:31 -0400253int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000254 struct list_head *tmp_list,
Benny Halevy778b5502011-05-22 19:48:02 +0300255 struct pnfs_layout_range *recall_range);
Fred Isamanf7e89172011-01-06 11:36:32 +0000256bool pnfs_roc(struct inode *ino);
257void pnfs_roc_release(struct inode *ino);
258void pnfs_roc_set_barrier(struct inode *ino, u32 barrier);
Trond Myklebust7fdab062012-09-20 20:15:57 -0400259bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task);
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -0400260void pnfs_set_layoutcommit(struct nfs_pgio_header *);
Peng Tao378520b2014-08-07 10:15:02 +0800261void pnfs_commit_set_layoutcommit(struct nfs_commit_data *data);
Andy Adamsondb29c082011-07-30 20:52:38 -0400262void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data);
Andy Adamsonef311532011-03-12 02:58:10 -0500263int pnfs_layoutcommit_inode(struct inode *inode, bool sync);
Benny Halevycbe82602011-05-22 19:52:37 +0300264int _pnfs_return_layout(struct inode *);
Trond Myklebust24028672013-03-20 13:23:33 -0400265int pnfs_commit_and_return_layout(struct inode *);
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -0400266void pnfs_ld_write_done(struct nfs_pgio_header *);
267void pnfs_ld_read_done(struct nfs_pgio_header *);
Andy Adamson7c24d942011-06-13 18:22:38 -0400268struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
269 struct nfs_open_context *ctx,
270 loff_t pos,
271 u64 count,
272 enum pnfs_iomode iomode,
273 gfp_t gfp_flags);
Benny Halevye5e94012010-10-20 00:18:01 -0400274
Andy Adamsonc47abcf2011-06-15 17:52:40 -0400275void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp);
Weston Andros Adamson53113ad2014-06-09 11:48:38 -0400276int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *);
277int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *);
Andy Adamson82be4172012-05-23 05:02:35 -0400278struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
Peng Tao016256d2014-09-06 00:53:23 +0800279void pnfs_error_mark_layout_for_return(struct inode *inode,
280 struct pnfs_layout_segment *lseg);
Andy Adamsonc47abcf2011-06-15 17:52:40 -0400281
282/* nfs4_deviceid_flags */
283enum {
284 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */
Trond Myklebust1dfed272012-09-18 19:51:12 -0400285 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */
Andy Adamsonc47abcf2011-06-15 17:52:40 -0400286};
287
Benny Halevya1eaecb2011-05-19 22:14:47 -0400288/* pnfs_dev.c */
289struct nfs4_deviceid_node {
290 struct hlist_node node;
Weston Andros Adamson9e3bd4e2011-05-31 21:46:50 -0400291 struct hlist_node tmpnode;
Benny Halevy1775bc32011-05-20 13:47:33 +0200292 const struct pnfs_layoutdriver_type *ld;
Benny Halevya1eaecb2011-05-19 22:14:47 -0400293 const struct nfs_client *nfs_client;
Andy Adamsonc47abcf2011-06-15 17:52:40 -0400294 unsigned long flags;
Trond Myklebust1dfed272012-09-18 19:51:12 -0400295 unsigned long timestamp_unavailable;
Benny Halevya1eaecb2011-05-19 22:14:47 -0400296 struct nfs4_deviceid deviceid;
297 atomic_t ref;
298};
299
Christoph Hellwig661373b2014-09-02 21:27:57 -0700300struct nfs4_deviceid_node *
301nfs4_find_get_deviceid(struct nfs_server *server,
302 const struct nfs4_deviceid *id, struct rpc_cred *cred,
303 gfp_t gfp_mask);
Benny Halevy35c8bb52011-05-24 18:04:02 +0300304void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
Christoph Hellwig661373b2014-09-02 21:27:57 -0700305void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *,
Benny Halevya1eaecb2011-05-19 22:14:47 -0400306 const struct nfs4_deviceid *);
Benny Halevya1eaecb2011-05-19 22:14:47 -0400307bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *);
Trond Myklebust1dfed272012-09-18 19:51:12 -0400308void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node);
309bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node);
Benny Halevy1775bc32011-05-20 13:47:33 +0200310void nfs4_deviceid_purge_client(const struct nfs_client *);
Benny Halevya1eaecb2011-05-19 22:14:47 -0400311
Tom Haynesf54bcf22014-12-11 15:34:59 -0500312/* pnfs_nfs.c */
313void pnfs_generic_clear_request_commit(struct nfs_page *req,
314 struct nfs_commit_info *cinfo);
315void pnfs_generic_commit_release(void *calldata);
316void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data);
317void pnfs_generic_rw_release(void *data);
318void pnfs_generic_recover_commit_reqs(struct list_head *dst,
319 struct nfs_commit_info *cinfo);
320int pnfs_generic_commit_pagelist(struct inode *inode,
321 struct list_head *mds_pages,
322 int how,
323 struct nfs_commit_info *cinfo,
324 int (*initiate_commit)(struct nfs_commit_data *data,
325 int how));
326int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max);
327void pnfs_generic_write_commit_done(struct rpc_task *task, void *data);
Peng Tao875ae062014-05-29 21:06:57 +0800328void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds);
329struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs,
330 gfp_t gfp_flags);
Peng Tao5f01d952014-05-30 18:15:59 +0800331void nfs4_pnfs_v3_ds_connect_unload(void);
Peng Tao7405f9e2014-05-29 21:06:58 +0800332void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
333 struct nfs4_deviceid_node *devid, unsigned int timeo,
Peng Tao5f01d952014-05-30 18:15:59 +0800334 unsigned int retrans, u32 version, u32 minor_version,
Peng Tao30626f92014-05-30 18:15:58 +0800335 rpc_authflavor_t au_flavor);
Peng Tao6b7f3cf2014-05-29 21:06:59 +0800336struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net,
337 struct xdr_stream *xdr,
338 gfp_t gfp_flags);
Tom Haynesf54bcf22014-12-11 15:34:59 -0500339
Christoph Hellwig30ff0602014-09-02 21:27:59 -0700340static inline struct nfs4_deviceid_node *
341nfs4_get_deviceid(struct nfs4_deviceid_node *d)
342{
343 atomic_inc(&d->ref);
344 return d;
345}
346
Fred Isamand684d2a2011-03-01 01:34:13 +0000347static inline struct pnfs_layout_segment *
Trond Myklebust9369a432012-09-18 20:57:08 -0400348pnfs_get_lseg(struct pnfs_layout_segment *lseg)
Fred Isamand684d2a2011-03-01 01:34:13 +0000349{
350 if (lseg) {
351 atomic_inc(&lseg->pls_refcount);
Peter Zijlstra4e857c52014-03-17 18:06:10 +0100352 smp_mb__after_atomic();
Fred Isamand684d2a2011-03-01 01:34:13 +0000353 }
354 return lseg;
355}
356
Benny Halevye5e94012010-10-20 00:18:01 -0400357/* Return true if a layout driver is being used for this mountpoint */
358static inline int pnfs_enabled_sb(struct nfs_server *nfss)
359{
360 return nfss->pnfs_curr_ld != NULL;
361}
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400362
Fred Isamana861a1e2011-03-23 13:27:51 +0000363static inline int
Fred Isamanea2cf222012-04-20 14:47:53 -0400364pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
365 struct nfs_commit_info *cinfo)
Fred Isamana861a1e2011-03-23 13:27:51 +0000366{
Fred Isamanea2cf222012-04-20 14:47:53 -0400367 if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0)
Fred Isamana861a1e2011-03-23 13:27:51 +0000368 return PNFS_NOT_ATTEMPTED;
Fred Isamanea2cf222012-04-20 14:47:53 -0400369 return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo);
370}
371
372static inline struct pnfs_ds_commit_info *
373pnfs_get_ds_info(struct inode *inode)
374{
375 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
376
377 if (ld == NULL || ld->get_ds_info == NULL)
378 return NULL;
379 return ld->get_ds_info(inode);
Fred Isamana861a1e2011-03-23 13:27:51 +0000380}
381
Tom Haynesf54bcf22014-12-11 15:34:59 -0500382static inline void
383pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node)
384{
385 set_bit(NFS_DEVICEID_INVALID, &node->flags);
386}
387
Trond Myklebust8dd37752012-03-15 17:16:40 -0400388static inline bool
Fred Isamanea2cf222012-04-20 14:47:53 -0400389pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
390 struct nfs_commit_info *cinfo)
Fred Isamana861a1e2011-03-23 13:27:51 +0000391{
Fred Isamand6d6dc72012-03-08 17:29:35 -0500392 struct inode *inode = req->wb_context->dentry->d_inode;
Trond Myklebust8dd37752012-03-15 17:16:40 -0400393 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
Fred Isamana861a1e2011-03-23 13:27:51 +0000394
Trond Myklebust8dd37752012-03-15 17:16:40 -0400395 if (lseg == NULL || ld->mark_request_commit == NULL)
396 return false;
Fred Isamanea2cf222012-04-20 14:47:53 -0400397 ld->mark_request_commit(req, lseg, cinfo);
Trond Myklebust8dd37752012-03-15 17:16:40 -0400398 return true;
Fred Isamana861a1e2011-03-23 13:27:51 +0000399}
400
Trond Myklebust8dd37752012-03-15 17:16:40 -0400401static inline bool
Fred Isamanea2cf222012-04-20 14:47:53 -0400402pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
Fred Isamana861a1e2011-03-23 13:27:51 +0000403{
Fred Isamand6d6dc72012-03-08 17:29:35 -0500404 struct inode *inode = req->wb_context->dentry->d_inode;
Trond Myklebust8dd37752012-03-15 17:16:40 -0400405 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
Fred Isamand6d6dc72012-03-08 17:29:35 -0500406
Trond Myklebust8dd37752012-03-15 17:16:40 -0400407 if (ld == NULL || ld->clear_request_commit == NULL)
408 return false;
Fred Isamanea2cf222012-04-20 14:47:53 -0400409 ld->clear_request_commit(req, cinfo);
Trond Myklebust8dd37752012-03-15 17:16:40 -0400410 return true;
Fred Isamand6d6dc72012-03-08 17:29:35 -0500411}
412
413static inline int
Fred Isamanea2cf222012-04-20 14:47:53 -0400414pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
415 int max)
Fred Isamand6d6dc72012-03-08 17:29:35 -0500416{
Fred Isamanea2cf222012-04-20 14:47:53 -0400417 if (cinfo->ds == NULL || cinfo->ds->nwritten == 0)
Fred Isamand6d6dc72012-03-08 17:29:35 -0500418 return 0;
Fred Isamanea2cf222012-04-20 14:47:53 -0400419 else
420 return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max);
Fred Isamana861a1e2011-03-23 13:27:51 +0000421}
422
Weston Andros Adamson02d14262014-07-17 20:42:17 -0400423static inline struct nfs_page *
424pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
425 struct page *page)
426{
427 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
428
429 if (ld == NULL || ld->search_commit_reqs == NULL)
430 return NULL;
431 return ld->search_commit_reqs(cinfo, page);
432}
433
Benny Halevy8a1636c2010-07-14 15:43:57 -0400434/* Should the pNFS client commit and return the layout upon a setattr */
435static inline bool
436pnfs_ld_layoutret_on_setattr(struct inode *inode)
437{
438 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
439 return false;
440 return NFS_SERVER(inode)->pnfs_curr_ld->flags &
441 PNFS_LAYOUTRET_ON_SETATTR;
442}
443
Trond Myklebustd8c951c2014-01-13 12:08:11 -0500444static inline bool
Christoph Hellwig612aa982014-09-10 08:23:30 -0700445pnfs_ld_read_whole_page(struct inode *inode)
446{
447 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
448 return false;
449 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE;
450}
451
452static inline bool
Trond Myklebustd8c951c2014-01-13 12:08:11 -0500453pnfs_layoutcommit_outstanding(struct inode *inode)
454{
455 struct nfs_inode *nfsi = NFS_I(inode);
456
457 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 ||
458 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0;
459}
460
Benny Halevycbe82602011-05-22 19:52:37 +0300461static inline int pnfs_return_layout(struct inode *ino)
462{
463 struct nfs_inode *nfsi = NFS_I(ino);
464 struct nfs_server *nfss = NFS_SERVER(ino);
465
466 if (pnfs_enabled_sb(nfss) && nfsi->layout)
467 return _pnfs_return_layout(ino);
468
469 return 0;
470}
471
Andy Adamson82be4172012-05-23 05:02:35 -0400472static inline bool
473pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
474 struct nfs_server *nfss)
475{
Fred Isamanfb47ddc2012-06-07 11:42:12 -0400476 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld &&
Andy Adamson82be4172012-05-23 05:02:35 -0400477 nfss->pnfs_curr_ld->id == src->l_type);
478}
479
Trond Myklebust6f008662012-03-20 14:12:46 -0400480#ifdef NFS_DEBUG
481void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id);
482#else
483static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id)
484{
485}
486#endif /* NFS_DEBUG */
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400487#else /* CONFIG_NFS_V4_1 */
488
Andy Adamson974cec82010-10-20 00:18:02 -0400489static inline void pnfs_destroy_all_layouts(struct nfs_client *clp)
490{
491}
492
Benny Halevye5e94012010-10-20 00:18:01 -0400493static inline void pnfs_destroy_layout(struct nfs_inode *nfsi)
494{
495}
496
497static inline struct pnfs_layout_segment *
Trond Myklebust9369a432012-09-18 20:57:08 -0400498pnfs_get_lseg(struct pnfs_layout_segment *lseg)
Fred Isamand684d2a2011-03-01 01:34:13 +0000499{
500 return NULL;
501}
502
Trond Myklebust9369a432012-09-18 20:57:08 -0400503static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg)
Fred Isamand684d2a2011-03-01 01:34:13 +0000504{
505}
506
Benny Halevycbe82602011-05-22 19:52:37 +0300507static inline int pnfs_return_layout(struct inode *ino)
508{
509 return 0;
510}
511
Trond Myklebust24028672013-03-20 13:23:33 -0400512static inline int pnfs_commit_and_return_layout(struct inode *inode)
513{
514 return 0;
515}
516
Fred Isamanf7e89172011-01-06 11:36:32 +0000517static inline bool
Benny Halevy8a1636c2010-07-14 15:43:57 -0400518pnfs_ld_layoutret_on_setattr(struct inode *inode)
519{
520 return false;
521}
522
523static inline bool
Christoph Hellwig612aa982014-09-10 08:23:30 -0700524pnfs_ld_read_whole_page(struct inode *inode)
525{
526 return false;
527}
528
529static inline bool
Fred Isamanf7e89172011-01-06 11:36:32 +0000530pnfs_roc(struct inode *ino)
531{
532 return false;
533}
534
535static inline void
536pnfs_roc_release(struct inode *ino)
537{
538}
539
540static inline void
541pnfs_roc_set_barrier(struct inode *ino, u32 barrier)
542{
543}
544
545static inline bool
Trond Myklebust7fdab062012-09-20 20:15:57 -0400546pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task)
Fred Isamanf7e89172011-01-06 11:36:32 +0000547{
548 return false;
549}
550
Benny Halevy738fd0f32011-07-30 20:52:36 -0400551static inline void set_pnfs_layoutdriver(struct nfs_server *s,
Trond Myklebusta00ed252011-07-31 16:39:04 -0400552 const struct nfs_fh *mntfh, u32 id)
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400553{
554}
555
556static inline void unset_pnfs_layoutdriver(struct nfs_server *s)
557{
558}
559
Fred Isamana861a1e2011-03-23 13:27:51 +0000560static inline int
Fred Isamanea2cf222012-04-20 14:47:53 -0400561pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
562 struct nfs_commit_info *cinfo)
Fred Isamana861a1e2011-03-23 13:27:51 +0000563{
564 return PNFS_NOT_ATTEMPTED;
565}
566
Fred Isamanea2cf222012-04-20 14:47:53 -0400567static inline struct pnfs_ds_commit_info *
568pnfs_get_ds_info(struct inode *inode)
569{
570 return NULL;
571}
572
Trond Myklebust8dd37752012-03-15 17:16:40 -0400573static inline bool
Fred Isamanea2cf222012-04-20 14:47:53 -0400574pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
575 struct nfs_commit_info *cinfo)
Fred Isamana861a1e2011-03-23 13:27:51 +0000576{
Trond Myklebust8dd37752012-03-15 17:16:40 -0400577 return false;
Fred Isamana861a1e2011-03-23 13:27:51 +0000578}
579
Trond Myklebust8dd37752012-03-15 17:16:40 -0400580static inline bool
Fred Isamanea2cf222012-04-20 14:47:53 -0400581pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
Fred Isamana861a1e2011-03-23 13:27:51 +0000582{
Trond Myklebust8dd37752012-03-15 17:16:40 -0400583 return false;
Fred Isamand6d6dc72012-03-08 17:29:35 -0500584}
585
586static inline int
Fred Isamanea2cf222012-04-20 14:47:53 -0400587pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
588 int max)
Fred Isamand6d6dc72012-03-08 17:29:35 -0500589{
590 return 0;
Fred Isamana861a1e2011-03-23 13:27:51 +0000591}
592
Weston Andros Adamson02d14262014-07-17 20:42:17 -0400593static inline struct nfs_page *
594pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
595 struct page *page)
596{
597 return NULL;
598}
599
Andy Adamsonef311532011-03-12 02:58:10 -0500600static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync)
Andy Adamson863a3c62011-03-23 13:27:54 +0000601{
602 return 0;
603}
Benny Halevy1775bc32011-05-20 13:47:33 +0200604
Andy Adamson82be4172012-05-23 05:02:35 -0400605static inline bool
606pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
607 struct nfs_server *nfss)
608{
609 return false;
610}
611
Trond Myklebustd8c951c2014-01-13 12:08:11 -0500612static inline bool
613pnfs_layoutcommit_outstanding(struct inode *inode)
614{
615 return false;
616}
617
618
Andy Adamson82be4172012-05-23 05:02:35 -0400619static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void)
620{
621 return NULL;
622}
623
Peng Tao5f01d952014-05-30 18:15:59 +0800624static inline void nfs4_pnfs_v3_ds_connect_unload(void)
625{
626}
627
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400628#endif /* CONFIG_NFS_V4_1 */
629
630#endif /* FS_NFS_PNFS_H */