blob: 1e6308f82fc3d5887de850e72226233e4f2138d2 [file] [log] [blame]
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 */
Ricardo Labiaga85e174b2010-10-20 00:17:58 -040060};
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,
Peng Taoceb11e12014-11-10 08:35:38 +080075 PNFS_TRY_AGAIN = 2,
Andy Adamson64419a92011-03-01 01:34:16 +000076};
77
Ricardo Labiaga85e174b2010-10-20 00:17:58 -040078#ifdef CONFIG_NFS_V4_1
79
80#define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4"
81
Peng Tao39280a52014-05-30 18:15:55 +080082/*
83 * Default data server connection timeout and retrans vaules.
84 * Set by module parameters dataserver_timeo and dataserver_retrans.
85 */
86#define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */
87#define NFS4_DEF_DS_RETRANS 5
88
89/* error codes for internal use */
90#define NFS4ERR_RESET_TO_MDS 12001
91#define NFS4ERR_RESET_TO_PNFS 12002
92
Benny Halevye5e94012010-10-20 00:18:01 -040093enum {
94 NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */
95 NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */
Fred Isaman43f1b3d2011-01-06 11:36:30 +000096 NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */
Fred Isamanf7e89172011-01-06 11:36:32 +000097 NFS_LAYOUT_ROC, /* some lseg had roc bit set */
Trond Myklebustd527e5c2012-10-11 13:43:38 -040098 NFS_LAYOUT_RETURN, /* Return this layout ASAP */
Peng Tao193e3aa2014-11-17 09:30:41 +080099 NFS_LAYOUT_RETURN_BEFORE_CLOSE, /* Return this layout before close */
Christoph Hellwig47abade2014-08-21 11:09:22 -0500100 NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */
Peng Tao9bf87482014-08-22 17:37:41 +0800101 NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */
Peng Taoc8290132014-12-01 08:22:18 +0800102 NFS_LAYOUT_RETRY_LAYOUTGET, /* Retry layoutget */
Benny Halevye5e94012010-10-20 00:18:01 -0400103};
104
Benny Halevy8a1636c2010-07-14 15:43:57 -0400105enum layoutdriver_policy_flags {
Peng Tao88ac8152014-09-12 11:04:10 +0800106 /* Should the pNFS client commit and return the layout upon truncate to
107 * a smaller size */
Benny Halevy8a1636c2010-07-14 15:43:57 -0400108 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0,
Boaz Harroshfe0fe832012-01-06 09:31:20 +0200109 PNFS_LAYOUTRET_ON_ERROR = 1 << 1,
Christoph Hellwig612aa982014-09-10 08:23:30 -0700110 PNFS_READ_WHOLE_PAGE = 1 << 2,
Benny Halevy8a1636c2010-07-14 15:43:57 -0400111};
112
Benny Halevy1775bc32011-05-20 13:47:33 +0200113struct nfs4_deviceid_node;
114
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400115/* Per-layout driver specific registration structure */
116struct pnfs_layoutdriver_type {
Fred Isaman02c35fc2010-10-20 00:17:59 -0400117 struct list_head pnfs_tblid;
118 const u32 id;
119 const char *name;
120 struct module *owner;
Benny Halevy8a1636c2010-07-14 15:43:57 -0400121 unsigned flags;
Christoph Hellwig661373b2014-09-02 21:27:57 -0700122 unsigned max_deviceinfo_size;
Benny Halevy636fb9c2011-05-22 19:51:33 +0300123
Benny Halevy738fd0f32011-07-30 20:52:36 -0400124 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *);
125 int (*clear_layoutdriver) (struct nfs_server *);
126
Benny Halevy636fb9c2011-05-22 19:51:33 +0300127 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags);
128 void (*free_layout_hdr) (struct pnfs_layout_hdr *);
129
Trond Myklebusta75b9df2011-05-11 18:00:51 -0400130 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 -0400131 void (*free_lseg) (struct pnfs_layout_segment *lseg);
Fred Isaman94ad1c82011-03-01 01:34:14 +0000132
Christoph Hellwigc88953d2014-09-10 08:23:31 -0700133 void (*return_range) (struct pnfs_layout_hdr *lo,
134 struct pnfs_layout_range *range);
135
Fred Isaman94ad1c82011-03-01 01:34:14 +0000136 /* test for nfs page cache coalescing */
Trond Myklebust1751c362011-06-10 13:30:23 -0400137 const struct nfs_pageio_ops *pg_read_ops;
138 const struct nfs_pageio_ops *pg_write_ops;
Andy Adamson64419a92011-03-01 01:34:16 +0000139
Fred Isamanea2cf222012-04-20 14:47:53 -0400140 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode);
Trond Myklebust8dd37752012-03-15 17:16:40 -0400141 void (*mark_request_commit) (struct nfs_page *req,
Fred Isamanea2cf222012-04-20 14:47:53 -0400142 struct pnfs_layout_segment *lseg,
Weston Andros Adamsonb57ff132014-09-05 18:20:21 -0400143 struct nfs_commit_info *cinfo,
144 u32 ds_commit_idx);
Fred Isamanea2cf222012-04-20 14:47:53 -0400145 void (*clear_request_commit) (struct nfs_page *req,
146 struct nfs_commit_info *cinfo);
147 int (*scan_commit_lists) (struct nfs_commit_info *cinfo,
148 int max);
Fred Isaman1763da12012-04-20 14:47:57 -0400149 void (*recover_commit_reqs) (struct list_head *list,
150 struct nfs_commit_info *cinfo);
Weston Andros Adamson02d14262014-07-17 20:42:17 -0400151 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo,
152 struct page *page);
Fred Isamanea2cf222012-04-20 14:47:53 -0400153 int (*commit_pagelist)(struct inode *inode,
154 struct list_head *mds_pages,
155 int how,
156 struct nfs_commit_info *cinfo);
Fred Isamana861a1e2011-03-23 13:27:51 +0000157
Trond Myklebust5bb89b42015-03-25 14:14:42 -0400158 int (*sync)(struct inode *inode, bool datasync);
159
Andy Adamson64419a92011-03-01 01:34:16 +0000160 /*
161 * Return PNFS_ATTEMPTED to indicate the layout code has attempted
162 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS
163 */
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -0400164 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *);
165 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int);
Benny Halevy1775bc32011-05-20 13:47:33 +0200166
167 void (*free_deviceid_node) (struct nfs4_deviceid_node *);
Christoph Hellwig661373b2014-09-02 21:27:57 -0700168 struct nfs4_deviceid_node * (*alloc_deviceid_node)
169 (struct nfs_server *server, struct pnfs_device *pdev,
170 gfp_t gfp_flags);
Andy Adamson04a55542011-05-22 19:53:10 +0300171
172 void (*encode_layoutreturn) (struct pnfs_layout_hdr *layoutid,
173 struct xdr_stream *xdr,
174 const struct nfs4_layoutreturn_args *args);
Benny Halevyac7db722011-05-22 19:53:48 +0300175
Andy Adamsondb29c082011-07-30 20:52:38 -0400176 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data);
Christoph Hellwig5f919c92014-08-21 11:09:25 -0500177 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args);
178 void (*encode_layoutcommit) (struct pnfs_layout_hdr *lo,
Benny Halevyac7db722011-05-22 19:53:48 +0300179 struct xdr_stream *xdr,
180 const struct nfs4_layoutcommit_args *args);
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400181};
182
Benny Halevye5e94012010-10-20 00:18:01 -0400183struct pnfs_layout_hdr {
Fred Isamancc6e5342011-01-06 11:36:28 +0000184 atomic_t plh_refcount;
Fred Isamanb7edfaa2011-01-06 11:36:21 +0000185 struct list_head plh_layouts; /* other client layouts */
Trond Myklebustfd9a8d72013-02-12 09:48:42 -0500186 struct list_head plh_bulk_destroy;
Fred Isamanb7edfaa2011-01-06 11:36:21 +0000187 struct list_head plh_segs; /* layout segments list */
Fred Isamanb7edfaa2011-01-06 11:36:21 +0000188 nfs4_stateid plh_stateid;
Fred Isamancf7d63f2011-01-06 11:36:25 +0000189 atomic_t plh_outstanding; /* number of RPCs out */
Fred Isamanf7e89172011-01-06 11:36:32 +0000190 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000191 u32 plh_barrier; /* ignore lower seqids */
Trond Myklebust25c75332012-09-18 17:01:12 -0400192 unsigned long plh_retry_timestamp;
Fred Isaman566052c2011-01-06 11:36:20 +0000193 unsigned long plh_flags;
Peng Tao016256d2014-09-06 00:53:23 +0800194 enum pnfs_iomode plh_return_iomode;
Peng Taoacff58802011-07-30 20:52:31 -0400195 loff_t plh_lwb; /* last write byte for layoutcommit */
Peng Tao9fa40752011-07-30 20:52:32 -0400196 struct rpc_cred *plh_lc_cred; /* layoutcommit cred */
Fred Isamanb7edfaa2011-01-06 11:36:21 +0000197 struct inode *plh_inode;
Benny Halevye5e94012010-10-20 00:18:01 -0400198};
199
Andy Adamsonb1f69b72010-10-20 00:18:03 -0400200struct pnfs_device {
201 struct nfs4_deviceid dev_id;
202 unsigned int layout_type;
203 unsigned int mincount;
Andy Adamsonf1c097b2013-06-25 19:02:53 -0400204 unsigned int maxcount; /* gdia_maxcount */
Andy Adamsonb1f69b72010-10-20 00:18:03 -0400205 struct page **pages;
Andy Adamsonb1f69b72010-10-20 00:18:03 -0400206 unsigned int pgbase;
Andy Adamsonf1c097b2013-06-25 19:02:53 -0400207 unsigned int pglen; /* reply buffer length */
Trond Myklebustdf526992015-03-09 14:48:32 -0400208 unsigned char nocache : 1;/* May not be cached */
Andy Adamsonb1f69b72010-10-20 00:18:03 -0400209};
210
Andy Adamson7f11d8d2011-07-30 20:52:35 -0400211#define NFS4_PNFS_GETDEVLIST_MAXNUM 16
212
213struct pnfs_devicelist {
214 unsigned int eof;
215 unsigned int num_devs;
216 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM];
217};
218
Fred Isaman02c35fc2010-10-20 00:17:59 -0400219extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *);
220extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *);
221
Andy Adamsonb1f69b72010-10-20 00:18:03 -0400222/* nfs4proc.c */
223extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
Trond Myklebustcd5875f2013-05-20 11:42:54 -0400224 struct pnfs_device *dev,
225 struct rpc_cred *cred);
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -0400226extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags);
Peng Tao6c166052014-11-17 09:30:40 +0800227extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync);
Andy Adamsonb1f69b72010-10-20 00:18:03 -0400228
229/* pnfs.c */
Trond Myklebust70c3bd22012-09-18 20:51:13 -0400230void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo);
Trond Myklebust9369a432012-09-18 20:57:08 -0400231void pnfs_put_lseg(struct pnfs_layout_segment *lseg);
Trond Myklebust6543f802014-10-08 16:39:12 -0400232void pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg);
Trond Myklebust1751c362011-06-10 13:30:23 -0400233
Benny Halevy738fd0f32011-07-30 20:52:36 -0400234void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32);
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400235void unset_pnfs_layoutdriver(struct nfs_server *);
Trond Myklebustd8007d42011-06-10 13:30:23 -0400236void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
Trond Myklebust493292d2011-07-13 15:58:28 -0400237int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
Peng Tao62965562012-09-25 14:55:57 +0800238void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
239 struct nfs_page *req, u64 wb_size);
Weston Andros Adamson180bb5e2014-09-10 15:48:01 -0400240void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *);
Trond Myklebustdce81292011-07-13 15:59:19 -0400241int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc);
Weston Andros Adamsonb4fdac12014-05-15 11:56:43 -0400242size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio,
243 struct nfs_page *prev, struct nfs_page *req);
Peng Tao1b0ae062011-09-22 21:50:12 -0400244void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg);
Trond Myklebusta0b0a6e2012-09-17 17:12:15 -0400245struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp);
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000246void pnfs_free_lseg_list(struct list_head *tmp_list);
Benny Halevye5e94012010-10-20 00:18:01 -0400247void pnfs_destroy_layout(struct nfs_inode *);
Andy Adamson974cec82010-10-20 00:18:02 -0400248void pnfs_destroy_all_layouts(struct nfs_client *);
Trond Myklebustfd9a8d72013-02-12 09:48:42 -0500249int pnfs_destroy_layouts_byfsid(struct nfs_client *clp,
250 struct nfs_fsid *fsid,
251 bool is_recall);
252int pnfs_destroy_layouts_byclid(struct nfs_client *clp,
253 bool is_recall);
Trond Myklebust70c3bd22012-09-18 20:51:13 -0400254void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo);
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000255void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo,
256 const nfs4_stateid *new,
257 bool update_barrier);
Fred Isamanfd6002e2011-01-06 11:36:22 +0000258int pnfs_choose_layoutget_stateid(nfs4_stateid *dst,
259 struct pnfs_layout_hdr *lo,
Peng Taoce6ab4f2014-09-06 00:53:24 +0800260 struct pnfs_layout_range *range,
Fred Isamanfd6002e2011-01-06 11:36:22 +0000261 struct nfs4_state *open_state);
Trond Myklebust49a85062012-09-18 20:43:31 -0400262int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
Fred Isaman43f1b3d2011-01-06 11:36:30 +0000263 struct list_head *tmp_list,
Benny Halevy778b5502011-05-22 19:48:02 +0300264 struct pnfs_layout_range *recall_range);
Fred Isamanf7e89172011-01-06 11:36:32 +0000265bool pnfs_roc(struct inode *ino);
266void pnfs_roc_release(struct inode *ino);
267void pnfs_roc_set_barrier(struct inode *ino, u32 barrier);
Trond Myklebust7fdab062012-09-20 20:15:57 -0400268bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task);
Trond Myklebust67af7612015-03-25 20:40:38 -0400269void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t);
Andy Adamsondb29c082011-07-30 20:52:38 -0400270void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data);
Andy Adamsonef311532011-03-12 02:58:10 -0500271int pnfs_layoutcommit_inode(struct inode *inode, bool sync);
Trond Myklebust5bb89b42015-03-25 14:14:42 -0400272int pnfs_generic_sync(struct inode *inode, bool datasync);
273int pnfs_nfs_generic_sync(struct inode *inode, bool datasync);
Benny Halevycbe82602011-05-22 19:52:37 +0300274int _pnfs_return_layout(struct inode *);
Trond Myklebust24028672013-03-20 13:23:33 -0400275int pnfs_commit_and_return_layout(struct inode *);
Weston Andros Adamsond45f60c2014-06-09 11:48:35 -0400276void pnfs_ld_write_done(struct nfs_pgio_header *);
277void pnfs_ld_read_done(struct nfs_pgio_header *);
Peng Taoceb11e12014-11-10 08:35:38 +0800278int pnfs_read_resend_pnfs(struct nfs_pgio_header *);
Andy Adamson7c24d942011-06-13 18:22:38 -0400279struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
280 struct nfs_open_context *ctx,
281 loff_t pos,
282 u64 count,
283 enum pnfs_iomode iomode,
284 gfp_t gfp_flags);
Tom Haynesd67ae822014-12-11 17:02:04 -0500285void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo);
Benny Halevye5e94012010-10-20 00:18:01 -0400286
Andy Adamsonc47abcf2011-06-15 17:52:40 -0400287void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp);
Weston Andros Adamson53113ad2014-06-09 11:48:38 -0400288int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *);
289int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *);
Andy Adamson82be4172012-05-23 05:02:35 -0400290struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
Peng Tao016256d2014-09-06 00:53:23 +0800291void pnfs_error_mark_layout_for_return(struct inode *inode,
292 struct pnfs_layout_segment *lseg);
Andy Adamsonc47abcf2011-06-15 17:52:40 -0400293
294/* nfs4_deviceid_flags */
295enum {
296 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */
Trond Myklebust1dfed272012-09-18 19:51:12 -0400297 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */
Trond Myklebustdf526992015-03-09 14:48:32 -0400298 NFS_DEVICEID_NOCACHE, /* device may not be cached */
Andy Adamsonc47abcf2011-06-15 17:52:40 -0400299};
300
Benny Halevya1eaecb2011-05-19 22:14:47 -0400301/* pnfs_dev.c */
302struct nfs4_deviceid_node {
303 struct hlist_node node;
Weston Andros Adamson9e3bd4e2011-05-31 21:46:50 -0400304 struct hlist_node tmpnode;
Benny Halevy1775bc32011-05-20 13:47:33 +0200305 const struct pnfs_layoutdriver_type *ld;
Benny Halevya1eaecb2011-05-19 22:14:47 -0400306 const struct nfs_client *nfs_client;
Andy Adamsonc47abcf2011-06-15 17:52:40 -0400307 unsigned long flags;
Trond Myklebust1dfed272012-09-18 19:51:12 -0400308 unsigned long timestamp_unavailable;
Benny Halevya1eaecb2011-05-19 22:14:47 -0400309 struct nfs4_deviceid deviceid;
Trond Myklebust84a80f62015-03-09 15:23:35 -0400310 struct rcu_head rcu;
Benny Halevya1eaecb2011-05-19 22:14:47 -0400311 atomic_t ref;
312};
313
Christoph Hellwig661373b2014-09-02 21:27:57 -0700314struct nfs4_deviceid_node *
315nfs4_find_get_deviceid(struct nfs_server *server,
316 const struct nfs4_deviceid *id, struct rpc_cred *cred,
317 gfp_t gfp_mask);
Benny Halevy35c8bb52011-05-24 18:04:02 +0300318void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
Christoph Hellwig661373b2014-09-02 21:27:57 -0700319void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *,
Benny Halevya1eaecb2011-05-19 22:14:47 -0400320 const struct nfs4_deviceid *);
Benny Halevya1eaecb2011-05-19 22:14:47 -0400321bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *);
Trond Myklebust1dfed272012-09-18 19:51:12 -0400322void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node);
323bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node);
Benny Halevy1775bc32011-05-20 13:47:33 +0200324void nfs4_deviceid_purge_client(const struct nfs_client *);
Benny Halevya1eaecb2011-05-19 22:14:47 -0400325
Tom Haynesf54bcf22014-12-11 15:34:59 -0500326/* pnfs_nfs.c */
327void pnfs_generic_clear_request_commit(struct nfs_page *req,
328 struct nfs_commit_info *cinfo);
329void pnfs_generic_commit_release(void *calldata);
330void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data);
331void pnfs_generic_rw_release(void *data);
332void pnfs_generic_recover_commit_reqs(struct list_head *dst,
333 struct nfs_commit_info *cinfo);
334int pnfs_generic_commit_pagelist(struct inode *inode,
335 struct list_head *mds_pages,
336 int how,
337 struct nfs_commit_info *cinfo,
338 int (*initiate_commit)(struct nfs_commit_data *data,
339 int how));
340int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max);
341void pnfs_generic_write_commit_done(struct rpc_task *task, void *data);
Peng Tao875ae062014-05-29 21:06:57 +0800342void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds);
343struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs,
344 gfp_t gfp_flags);
Peng Tao5f01d952014-05-30 18:15:59 +0800345void nfs4_pnfs_v3_ds_connect_unload(void);
Peng Tao7405f9e2014-05-29 21:06:58 +0800346void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
347 struct nfs4_deviceid_node *devid, unsigned int timeo,
Peng Tao5f01d952014-05-30 18:15:59 +0800348 unsigned int retrans, u32 version, u32 minor_version,
Peng Tao30626f92014-05-30 18:15:58 +0800349 rpc_authflavor_t au_flavor);
Peng Tao6b7f3cf2014-05-29 21:06:59 +0800350struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net,
351 struct xdr_stream *xdr,
352 gfp_t gfp_flags);
Tom Haynes338d00c2015-02-17 14:58:15 -0800353void pnfs_layout_mark_request_commit(struct nfs_page *req,
354 struct pnfs_layout_segment *lseg,
355 struct nfs_commit_info *cinfo,
356 u32 ds_commit_idx);
Tom Haynesf54bcf22014-12-11 15:34:59 -0500357
Trond Myklebust40dd4b72015-01-24 13:54:37 -0500358static inline bool nfs_have_layout(struct inode *inode)
359{
360 return NFS_I(inode)->layout != NULL;
361}
362
Christoph Hellwig30ff0602014-09-02 21:27:59 -0700363static inline struct nfs4_deviceid_node *
364nfs4_get_deviceid(struct nfs4_deviceid_node *d)
365{
366 atomic_inc(&d->ref);
367 return d;
368}
369
Peng Taoc8290132014-12-01 08:22:18 +0800370static inline void pnfs_set_retry_layoutget(struct pnfs_layout_hdr *lo)
371{
372 if (!test_and_set_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags))
373 atomic_inc(&lo->plh_refcount);
374}
375
376static inline void pnfs_clear_retry_layoutget(struct pnfs_layout_hdr *lo)
377{
Peng Taoaa8a45e2014-12-01 08:22:23 +0800378 if (test_and_clear_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags)) {
Peng Taoc8290132014-12-01 08:22:18 +0800379 atomic_dec(&lo->plh_refcount);
Peng Taoaa8a45e2014-12-01 08:22:23 +0800380 /* wake up waiters for LAYOUTRETURN as that is not needed */
381 wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN);
382 }
Peng Taoc8290132014-12-01 08:22:18 +0800383}
384
385static inline bool pnfs_should_retry_layoutget(struct pnfs_layout_hdr *lo)
386{
387 return test_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags);
388}
389
Fred Isamand684d2a2011-03-01 01:34:13 +0000390static inline struct pnfs_layout_segment *
Trond Myklebust9369a432012-09-18 20:57:08 -0400391pnfs_get_lseg(struct pnfs_layout_segment *lseg)
Fred Isamand684d2a2011-03-01 01:34:13 +0000392{
393 if (lseg) {
394 atomic_inc(&lseg->pls_refcount);
Peter Zijlstra4e857c52014-03-17 18:06:10 +0100395 smp_mb__after_atomic();
Fred Isamand684d2a2011-03-01 01:34:13 +0000396 }
397 return lseg;
398}
399
Benny Halevye5e94012010-10-20 00:18:01 -0400400/* Return true if a layout driver is being used for this mountpoint */
401static inline int pnfs_enabled_sb(struct nfs_server *nfss)
402{
403 return nfss->pnfs_curr_ld != NULL;
404}
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400405
Fred Isamana861a1e2011-03-23 13:27:51 +0000406static inline int
Fred Isamanea2cf222012-04-20 14:47:53 -0400407pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
408 struct nfs_commit_info *cinfo)
Fred Isamana861a1e2011-03-23 13:27:51 +0000409{
Fred Isamanea2cf222012-04-20 14:47:53 -0400410 if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0)
Fred Isamana861a1e2011-03-23 13:27:51 +0000411 return PNFS_NOT_ATTEMPTED;
Fred Isamanea2cf222012-04-20 14:47:53 -0400412 return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo);
413}
414
415static inline struct pnfs_ds_commit_info *
416pnfs_get_ds_info(struct inode *inode)
417{
418 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
419
420 if (ld == NULL || ld->get_ds_info == NULL)
421 return NULL;
422 return ld->get_ds_info(inode);
Fred Isamana861a1e2011-03-23 13:27:51 +0000423}
424
Tom Haynesf54bcf22014-12-11 15:34:59 -0500425static inline void
426pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node)
427{
428 set_bit(NFS_DEVICEID_INVALID, &node->flags);
429}
430
Trond Myklebust8dd37752012-03-15 17:16:40 -0400431static inline bool
Fred Isamanea2cf222012-04-20 14:47:53 -0400432pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
Weston Andros Adamsonb57ff132014-09-05 18:20:21 -0400433 struct nfs_commit_info *cinfo, u32 ds_commit_idx)
Fred Isamana861a1e2011-03-23 13:27:51 +0000434{
David Howells2b0143b2015-03-17 22:25:59 +0000435 struct inode *inode = d_inode(req->wb_context->dentry);
Trond Myklebust8dd37752012-03-15 17:16:40 -0400436 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
Fred Isamana861a1e2011-03-23 13:27:51 +0000437
Trond Myklebust8dd37752012-03-15 17:16:40 -0400438 if (lseg == NULL || ld->mark_request_commit == NULL)
439 return false;
Weston Andros Adamsonb57ff132014-09-05 18:20:21 -0400440 ld->mark_request_commit(req, lseg, cinfo, ds_commit_idx);
Trond Myklebust8dd37752012-03-15 17:16:40 -0400441 return true;
Fred Isamana861a1e2011-03-23 13:27:51 +0000442}
443
Trond Myklebust8dd37752012-03-15 17:16:40 -0400444static inline bool
Fred Isamanea2cf222012-04-20 14:47:53 -0400445pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
Fred Isamana861a1e2011-03-23 13:27:51 +0000446{
David Howells2b0143b2015-03-17 22:25:59 +0000447 struct inode *inode = d_inode(req->wb_context->dentry);
Trond Myklebust8dd37752012-03-15 17:16:40 -0400448 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
Fred Isamand6d6dc72012-03-08 17:29:35 -0500449
Trond Myklebust8dd37752012-03-15 17:16:40 -0400450 if (ld == NULL || ld->clear_request_commit == NULL)
451 return false;
Fred Isamanea2cf222012-04-20 14:47:53 -0400452 ld->clear_request_commit(req, cinfo);
Trond Myklebust8dd37752012-03-15 17:16:40 -0400453 return true;
Fred Isamand6d6dc72012-03-08 17:29:35 -0500454}
455
456static inline int
Fred Isamanea2cf222012-04-20 14:47:53 -0400457pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
458 int max)
Fred Isamand6d6dc72012-03-08 17:29:35 -0500459{
Fred Isamanea2cf222012-04-20 14:47:53 -0400460 if (cinfo->ds == NULL || cinfo->ds->nwritten == 0)
Fred Isamand6d6dc72012-03-08 17:29:35 -0500461 return 0;
Fred Isamanea2cf222012-04-20 14:47:53 -0400462 else
463 return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max);
Fred Isamana861a1e2011-03-23 13:27:51 +0000464}
465
Weston Andros Adamson02d14262014-07-17 20:42:17 -0400466static inline struct nfs_page *
467pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
468 struct page *page)
469{
470 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
471
472 if (ld == NULL || ld->search_commit_reqs == NULL)
473 return NULL;
474 return ld->search_commit_reqs(cinfo, page);
475}
476
Benny Halevy8a1636c2010-07-14 15:43:57 -0400477/* Should the pNFS client commit and return the layout upon a setattr */
478static inline bool
479pnfs_ld_layoutret_on_setattr(struct inode *inode)
480{
481 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
482 return false;
483 return NFS_SERVER(inode)->pnfs_curr_ld->flags &
484 PNFS_LAYOUTRET_ON_SETATTR;
485}
486
Trond Myklebustd8c951c2014-01-13 12:08:11 -0500487static inline bool
Christoph Hellwig612aa982014-09-10 08:23:30 -0700488pnfs_ld_read_whole_page(struct inode *inode)
489{
490 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
491 return false;
492 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE;
493}
494
Trond Myklebust5bb89b42015-03-25 14:14:42 -0400495static inline int
496pnfs_sync_inode(struct inode *inode, bool datasync)
497{
498 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
499 return 0;
500 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync);
501}
502
Christoph Hellwig612aa982014-09-10 08:23:30 -0700503static inline bool
Trond Myklebustd8c951c2014-01-13 12:08:11 -0500504pnfs_layoutcommit_outstanding(struct inode *inode)
505{
506 struct nfs_inode *nfsi = NFS_I(inode);
507
508 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 ||
509 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0;
510}
511
Benny Halevycbe82602011-05-22 19:52:37 +0300512static inline int pnfs_return_layout(struct inode *ino)
513{
514 struct nfs_inode *nfsi = NFS_I(ino);
515 struct nfs_server *nfss = NFS_SERVER(ino);
516
517 if (pnfs_enabled_sb(nfss) && nfsi->layout)
518 return _pnfs_return_layout(ino);
519
520 return 0;
521}
522
Andy Adamson82be4172012-05-23 05:02:35 -0400523static inline bool
524pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
525 struct nfs_server *nfss)
526{
Fred Isamanfb47ddc2012-06-07 11:42:12 -0400527 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld &&
Andy Adamson82be4172012-05-23 05:02:35 -0400528 nfss->pnfs_curr_ld->id == src->l_type);
529}
530
Trond Myklebust6f008662012-03-20 14:12:46 -0400531#ifdef NFS_DEBUG
532void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id);
533#else
534static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id)
535{
536}
537#endif /* NFS_DEBUG */
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400538#else /* CONFIG_NFS_V4_1 */
539
Trond Myklebust40dd4b72015-01-24 13:54:37 -0500540static inline bool nfs_have_layout(struct inode *inode)
541{
542 return false;
543}
544
Andy Adamson974cec82010-10-20 00:18:02 -0400545static inline void pnfs_destroy_all_layouts(struct nfs_client *clp)
546{
547}
548
Benny Halevye5e94012010-10-20 00:18:01 -0400549static inline void pnfs_destroy_layout(struct nfs_inode *nfsi)
550{
551}
552
553static inline struct pnfs_layout_segment *
Trond Myklebust9369a432012-09-18 20:57:08 -0400554pnfs_get_lseg(struct pnfs_layout_segment *lseg)
Fred Isamand684d2a2011-03-01 01:34:13 +0000555{
556 return NULL;
557}
558
Trond Myklebust9369a432012-09-18 20:57:08 -0400559static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg)
Fred Isamand684d2a2011-03-01 01:34:13 +0000560{
561}
562
Benny Halevycbe82602011-05-22 19:52:37 +0300563static inline int pnfs_return_layout(struct inode *ino)
564{
565 return 0;
566}
567
Trond Myklebust24028672013-03-20 13:23:33 -0400568static inline int pnfs_commit_and_return_layout(struct inode *inode)
569{
570 return 0;
571}
572
Fred Isamanf7e89172011-01-06 11:36:32 +0000573static inline bool
Benny Halevy8a1636c2010-07-14 15:43:57 -0400574pnfs_ld_layoutret_on_setattr(struct inode *inode)
575{
576 return false;
577}
578
579static inline bool
Christoph Hellwig612aa982014-09-10 08:23:30 -0700580pnfs_ld_read_whole_page(struct inode *inode)
581{
582 return false;
583}
584
Trond Myklebust5bb89b42015-03-25 14:14:42 -0400585static inline int
586pnfs_sync_inode(struct inode *inode, bool datasync)
587{
588 return 0;
589}
590
Christoph Hellwig612aa982014-09-10 08:23:30 -0700591static inline bool
Fred Isamanf7e89172011-01-06 11:36:32 +0000592pnfs_roc(struct inode *ino)
593{
594 return false;
595}
596
597static inline void
598pnfs_roc_release(struct inode *ino)
599{
600}
601
602static inline void
603pnfs_roc_set_barrier(struct inode *ino, u32 barrier)
604{
605}
606
607static inline bool
Trond Myklebust7fdab062012-09-20 20:15:57 -0400608pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task)
Fred Isamanf7e89172011-01-06 11:36:32 +0000609{
610 return false;
611}
612
Benny Halevy738fd0f32011-07-30 20:52:36 -0400613static inline void set_pnfs_layoutdriver(struct nfs_server *s,
Trond Myklebusta00ed252011-07-31 16:39:04 -0400614 const struct nfs_fh *mntfh, u32 id)
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400615{
616}
617
618static inline void unset_pnfs_layoutdriver(struct nfs_server *s)
619{
620}
621
Fred Isamana861a1e2011-03-23 13:27:51 +0000622static inline int
Fred Isamanea2cf222012-04-20 14:47:53 -0400623pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
624 struct nfs_commit_info *cinfo)
Fred Isamana861a1e2011-03-23 13:27:51 +0000625{
626 return PNFS_NOT_ATTEMPTED;
627}
628
Fred Isamanea2cf222012-04-20 14:47:53 -0400629static inline struct pnfs_ds_commit_info *
630pnfs_get_ds_info(struct inode *inode)
631{
632 return NULL;
633}
634
Trond Myklebust8dd37752012-03-15 17:16:40 -0400635static inline bool
Fred Isamanea2cf222012-04-20 14:47:53 -0400636pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
Weston Andros Adamsonb57ff132014-09-05 18:20:21 -0400637 struct nfs_commit_info *cinfo, u32 ds_commit_idx)
Fred Isamana861a1e2011-03-23 13:27:51 +0000638{
Trond Myklebust8dd37752012-03-15 17:16:40 -0400639 return false;
Fred Isamana861a1e2011-03-23 13:27:51 +0000640}
641
Trond Myklebust8dd37752012-03-15 17:16:40 -0400642static inline bool
Fred Isamanea2cf222012-04-20 14:47:53 -0400643pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
Fred Isamana861a1e2011-03-23 13:27:51 +0000644{
Trond Myklebust8dd37752012-03-15 17:16:40 -0400645 return false;
Fred Isamand6d6dc72012-03-08 17:29:35 -0500646}
647
648static inline int
Fred Isamanea2cf222012-04-20 14:47:53 -0400649pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
650 int max)
Fred Isamand6d6dc72012-03-08 17:29:35 -0500651{
652 return 0;
Fred Isamana861a1e2011-03-23 13:27:51 +0000653}
654
Weston Andros Adamson02d14262014-07-17 20:42:17 -0400655static inline struct nfs_page *
656pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
657 struct page *page)
658{
659 return NULL;
660}
661
Andy Adamsonef311532011-03-12 02:58:10 -0500662static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync)
Andy Adamson863a3c62011-03-23 13:27:54 +0000663{
664 return 0;
665}
Benny Halevy1775bc32011-05-20 13:47:33 +0200666
Andy Adamson82be4172012-05-23 05:02:35 -0400667static inline bool
668pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
669 struct nfs_server *nfss)
670{
671 return false;
672}
673
Trond Myklebustd8c951c2014-01-13 12:08:11 -0500674static inline bool
675pnfs_layoutcommit_outstanding(struct inode *inode)
676{
677 return false;
678}
679
680
Andy Adamson82be4172012-05-23 05:02:35 -0400681static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void)
682{
683 return NULL;
684}
685
Peng Tao5f01d952014-05-30 18:15:59 +0800686static inline void nfs4_pnfs_v3_ds_connect_unload(void)
687{
688}
689
Ricardo Labiaga85e174b2010-10-20 00:17:58 -0400690#endif /* CONFIG_NFS_V4_1 */
691
692#endif /* FS_NFS_PNFS_H */