Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 1 | /* |
| 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 Halevy | 45df3c8 | 2011-05-05 08:28:46 +0300 | [diff] [blame] | 33 | #include <linux/nfs_fs.h> |
Fred Isaman | 94ad1c8 | 2011-03-01 01:34:14 +0000 | [diff] [blame] | 34 | #include <linux/nfs_page.h> |
| 35 | |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 36 | enum { |
| 37 | NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */ |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 38 | NFS_LSEG_ROC, /* roc bit received from server */ |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 39 | }; |
| 40 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 41 | struct pnfs_layout_segment { |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 42 | struct list_head pls_list; |
| 43 | struct pnfs_layout_range pls_range; |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 44 | atomic_t pls_refcount; |
| 45 | unsigned long pls_flags; |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 46 | struct pnfs_layout_hdr *pls_layout; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 47 | struct rpc_cred *pls_lc_cred; /* LAYOUTCOMMIT credential */ |
| 48 | loff_t pls_end_pos; /* LAYOUTCOMMIT write end */ |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 49 | }; |
| 50 | |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 51 | enum pnfs_try_status { |
| 52 | PNFS_ATTEMPTED = 0, |
| 53 | PNFS_NOT_ATTEMPTED = 1, |
| 54 | }; |
| 55 | |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 56 | #ifdef CONFIG_NFS_V4_1 |
| 57 | |
| 58 | #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4" |
| 59 | |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 60 | enum { |
| 61 | NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */ |
| 62 | NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 63 | NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */ |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 64 | NFS_LAYOUT_ROC, /* some lseg had roc bit set */ |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 65 | NFS_LAYOUT_DESTROYED, /* no new use of layout allowed */ |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 66 | }; |
| 67 | |
Benny Halevy | 1775bc3 | 2011-05-20 13:47:33 +0200 | [diff] [blame] | 68 | struct nfs4_deviceid_node; |
| 69 | |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 70 | /* Per-layout driver specific registration structure */ |
| 71 | struct pnfs_layoutdriver_type { |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 72 | struct list_head pnfs_tblid; |
| 73 | const u32 id; |
| 74 | const char *name; |
| 75 | struct module *owner; |
Benny Halevy | 636fb9c | 2011-05-22 19:51:33 +0300 | [diff] [blame] | 76 | |
| 77 | struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); |
| 78 | void (*free_layout_hdr) (struct pnfs_layout_hdr *); |
| 79 | |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 80 | struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 81 | void (*free_lseg) (struct pnfs_layout_segment *lseg); |
Fred Isaman | 94ad1c8 | 2011-03-01 01:34:14 +0000 | [diff] [blame] | 82 | |
| 83 | /* test for nfs page cache coalescing */ |
| 84 | int (*pg_test)(struct nfs_pageio_descriptor *, struct nfs_page *, struct nfs_page *); |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 85 | |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 86 | /* Returns true if layoutdriver wants to divert this request to |
| 87 | * driver's commit routine. |
| 88 | */ |
| 89 | bool (*mark_pnfs_commit)(struct pnfs_layout_segment *lseg); |
| 90 | struct list_head * (*choose_commit_list) (struct nfs_page *req); |
| 91 | int (*commit_pagelist)(struct inode *inode, struct list_head *mds_pages, int how); |
| 92 | |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 93 | /* |
| 94 | * Return PNFS_ATTEMPTED to indicate the layout code has attempted |
| 95 | * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS |
| 96 | */ |
| 97 | enum pnfs_try_status (*read_pagelist) (struct nfs_read_data *nfs_data); |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 98 | enum pnfs_try_status (*write_pagelist) (struct nfs_write_data *nfs_data, int how); |
Benny Halevy | 1775bc3 | 2011-05-20 13:47:33 +0200 | [diff] [blame] | 99 | |
| 100 | void (*free_deviceid_node) (struct nfs4_deviceid_node *); |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 101 | }; |
| 102 | |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 103 | struct pnfs_layout_hdr { |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 104 | atomic_t plh_refcount; |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 105 | struct list_head plh_layouts; /* other client layouts */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 106 | struct list_head plh_bulk_recall; /* clnt list of bulk recalls */ |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 107 | struct list_head plh_segs; /* layout segments list */ |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 108 | nfs4_stateid plh_stateid; |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 109 | atomic_t plh_outstanding; /* number of RPCs out */ |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 110 | unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 111 | u32 plh_barrier; /* ignore lower seqids */ |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 112 | unsigned long plh_flags; |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 113 | struct inode *plh_inode; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 114 | }; |
| 115 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 116 | struct pnfs_device { |
| 117 | struct nfs4_deviceid dev_id; |
| 118 | unsigned int layout_type; |
| 119 | unsigned int mincount; |
| 120 | struct page **pages; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 121 | unsigned int pgbase; |
| 122 | unsigned int pglen; |
| 123 | }; |
| 124 | |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 125 | extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); |
| 126 | extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); |
| 127 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 128 | /* nfs4proc.c */ |
| 129 | extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, |
| 130 | struct pnfs_device *dev); |
| 131 | extern int nfs4_proc_layoutget(struct nfs4_layoutget *lgp); |
| 132 | |
| 133 | /* pnfs.c */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 134 | void get_layout_hdr(struct pnfs_layout_hdr *lo); |
Fred Isaman | bae724e | 2011-03-01 01:34:15 +0000 | [diff] [blame] | 135 | void put_lseg(struct pnfs_layout_segment *lseg); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 136 | struct pnfs_layout_segment * |
| 137 | pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx, |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 138 | loff_t pos, u64 count, enum pnfs_iomode access_type, |
| 139 | gfp_t gfp_flags); |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 140 | void set_pnfs_layoutdriver(struct nfs_server *, u32 id); |
| 141 | void unset_pnfs_layoutdriver(struct nfs_server *); |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 142 | enum pnfs_try_status pnfs_try_to_write_data(struct nfs_write_data *, |
| 143 | const struct rpc_call_ops *, int); |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 144 | enum pnfs_try_status pnfs_try_to_read_data(struct nfs_read_data *, |
| 145 | const struct rpc_call_ops *); |
Fred Isaman | 94ad1c8 | 2011-03-01 01:34:14 +0000 | [diff] [blame] | 146 | void pnfs_pageio_init_read(struct nfs_pageio_descriptor *, struct inode *); |
Fred Isaman | 44b8379 | 2011-03-03 15:13:44 +0000 | [diff] [blame] | 147 | void pnfs_pageio_init_write(struct nfs_pageio_descriptor *, struct inode *); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 148 | int pnfs_layout_process(struct nfs4_layoutget *lgp); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 149 | void pnfs_free_lseg_list(struct list_head *tmp_list); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 150 | void pnfs_destroy_layout(struct nfs_inode *); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 151 | void pnfs_destroy_all_layouts(struct nfs_client *); |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 152 | void put_layout_hdr(struct pnfs_layout_hdr *lo); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 153 | void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, |
| 154 | const nfs4_stateid *new, |
| 155 | bool update_barrier); |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 156 | int pnfs_choose_layoutget_stateid(nfs4_stateid *dst, |
| 157 | struct pnfs_layout_hdr *lo, |
| 158 | struct nfs4_state *open_state); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 159 | int mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
| 160 | struct list_head *tmp_list, |
Benny Halevy | 778b550 | 2011-05-22 19:48:02 +0300 | [diff] [blame] | 161 | struct pnfs_layout_range *recall_range); |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 162 | bool pnfs_roc(struct inode *ino); |
| 163 | void pnfs_roc_release(struct inode *ino); |
| 164 | void pnfs_roc_set_barrier(struct inode *ino, u32 barrier); |
| 165 | bool pnfs_roc_drain(struct inode *ino, u32 *barrier); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 166 | void pnfs_set_layoutcommit(struct nfs_write_data *wdata); |
Andy Adamson | ef31153 | 2011-03-12 02:58:10 -0500 | [diff] [blame] | 167 | int pnfs_layoutcommit_inode(struct inode *inode, bool sync); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 168 | |
Benny Halevy | a1eaecb | 2011-05-19 22:14:47 -0400 | [diff] [blame] | 169 | /* pnfs_dev.c */ |
| 170 | struct nfs4_deviceid_node { |
| 171 | struct hlist_node node; |
Benny Halevy | 1775bc3 | 2011-05-20 13:47:33 +0200 | [diff] [blame] | 172 | const struct pnfs_layoutdriver_type *ld; |
Benny Halevy | a1eaecb | 2011-05-19 22:14:47 -0400 | [diff] [blame] | 173 | const struct nfs_client *nfs_client; |
| 174 | struct nfs4_deviceid deviceid; |
| 175 | atomic_t ref; |
| 176 | }; |
| 177 | |
| 178 | void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); |
Benny Halevy | 35c8bb5 | 2011-05-24 18:04:02 +0300 | [diff] [blame] | 179 | struct nfs4_deviceid_node *nfs4_find_get_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); |
| 180 | struct nfs4_deviceid_node *nfs4_unhash_put_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); |
| 181 | void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); |
Benny Halevy | a1eaecb | 2011-05-19 22:14:47 -0400 | [diff] [blame] | 182 | void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, |
Benny Halevy | 1775bc3 | 2011-05-20 13:47:33 +0200 | [diff] [blame] | 183 | const struct pnfs_layoutdriver_type *, |
Benny Halevy | a1eaecb | 2011-05-19 22:14:47 -0400 | [diff] [blame] | 184 | const struct nfs_client *, |
| 185 | const struct nfs4_deviceid *); |
| 186 | struct nfs4_deviceid_node *nfs4_insert_deviceid_node(struct nfs4_deviceid_node *); |
| 187 | bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); |
Benny Halevy | 1775bc3 | 2011-05-20 13:47:33 +0200 | [diff] [blame] | 188 | void nfs4_deviceid_purge_client(const struct nfs_client *); |
Benny Halevy | a1eaecb | 2011-05-19 22:14:47 -0400 | [diff] [blame] | 189 | |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 190 | static inline int lo_fail_bit(u32 iomode) |
| 191 | { |
| 192 | return iomode == IOMODE_RW ? |
| 193 | NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; |
| 194 | } |
| 195 | |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 196 | static inline struct pnfs_layout_segment * |
| 197 | get_lseg(struct pnfs_layout_segment *lseg) |
| 198 | { |
| 199 | if (lseg) { |
| 200 | atomic_inc(&lseg->pls_refcount); |
| 201 | smp_mb__after_atomic_inc(); |
| 202 | } |
| 203 | return lseg; |
| 204 | } |
| 205 | |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 206 | /* Return true if a layout driver is being used for this mountpoint */ |
| 207 | static inline int pnfs_enabled_sb(struct nfs_server *nfss) |
| 208 | { |
| 209 | return nfss->pnfs_curr_ld != NULL; |
| 210 | } |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 211 | |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 212 | static inline void |
| 213 | pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg) |
| 214 | { |
| 215 | if (lseg) { |
| 216 | struct pnfs_layoutdriver_type *ld; |
| 217 | |
| 218 | ld = NFS_SERVER(req->wb_page->mapping->host)->pnfs_curr_ld; |
| 219 | if (ld->mark_pnfs_commit && ld->mark_pnfs_commit(lseg)) { |
| 220 | set_bit(PG_PNFS_COMMIT, &req->wb_flags); |
| 221 | req->wb_commit_lseg = get_lseg(lseg); |
| 222 | } |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | static inline int |
| 227 | pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how) |
| 228 | { |
| 229 | if (!test_and_clear_bit(NFS_INO_PNFS_COMMIT, &NFS_I(inode)->flags)) |
| 230 | return PNFS_NOT_ATTEMPTED; |
| 231 | return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how); |
| 232 | } |
| 233 | |
| 234 | static inline struct list_head * |
| 235 | pnfs_choose_commit_list(struct nfs_page *req, struct list_head *mds) |
| 236 | { |
| 237 | struct list_head *rv; |
| 238 | |
| 239 | if (test_and_clear_bit(PG_PNFS_COMMIT, &req->wb_flags)) { |
| 240 | struct inode *inode = req->wb_commit_lseg->pls_layout->plh_inode; |
| 241 | |
| 242 | set_bit(NFS_INO_PNFS_COMMIT, &NFS_I(inode)->flags); |
| 243 | rv = NFS_SERVER(inode)->pnfs_curr_ld->choose_commit_list(req); |
| 244 | /* matched by ref taken when PG_PNFS_COMMIT is set */ |
| 245 | put_lseg(req->wb_commit_lseg); |
| 246 | } else |
| 247 | rv = mds; |
| 248 | return rv; |
| 249 | } |
| 250 | |
| 251 | static inline void pnfs_clear_request_commit(struct nfs_page *req) |
| 252 | { |
| 253 | if (test_and_clear_bit(PG_PNFS_COMMIT, &req->wb_flags)) |
| 254 | put_lseg(req->wb_commit_lseg); |
| 255 | } |
| 256 | |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 257 | #else /* CONFIG_NFS_V4_1 */ |
| 258 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 259 | static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) |
| 260 | { |
| 261 | } |
| 262 | |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 263 | static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) |
| 264 | { |
| 265 | } |
| 266 | |
| 267 | static inline struct pnfs_layout_segment * |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 268 | get_lseg(struct pnfs_layout_segment *lseg) |
| 269 | { |
| 270 | return NULL; |
| 271 | } |
| 272 | |
| 273 | static inline void put_lseg(struct pnfs_layout_segment *lseg) |
| 274 | { |
| 275 | } |
| 276 | |
| 277 | static inline struct pnfs_layout_segment * |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 278 | pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx, |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 279 | loff_t pos, u64 count, enum pnfs_iomode access_type, |
| 280 | gfp_t gfp_flags) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 281 | { |
| 282 | return NULL; |
| 283 | } |
| 284 | |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 285 | static inline enum pnfs_try_status |
| 286 | pnfs_try_to_read_data(struct nfs_read_data *data, |
| 287 | const struct rpc_call_ops *call_ops) |
| 288 | { |
| 289 | return PNFS_NOT_ATTEMPTED; |
| 290 | } |
| 291 | |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 292 | static inline enum pnfs_try_status |
| 293 | pnfs_try_to_write_data(struct nfs_write_data *data, |
| 294 | const struct rpc_call_ops *call_ops, int how) |
| 295 | { |
| 296 | return PNFS_NOT_ATTEMPTED; |
| 297 | } |
| 298 | |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 299 | static inline bool |
| 300 | pnfs_roc(struct inode *ino) |
| 301 | { |
| 302 | return false; |
| 303 | } |
| 304 | |
| 305 | static inline void |
| 306 | pnfs_roc_release(struct inode *ino) |
| 307 | { |
| 308 | } |
| 309 | |
| 310 | static inline void |
| 311 | pnfs_roc_set_barrier(struct inode *ino, u32 barrier) |
| 312 | { |
| 313 | } |
| 314 | |
| 315 | static inline bool |
| 316 | pnfs_roc_drain(struct inode *ino, u32 *barrier) |
| 317 | { |
| 318 | return false; |
| 319 | } |
| 320 | |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 321 | static inline void set_pnfs_layoutdriver(struct nfs_server *s, u32 id) |
| 322 | { |
| 323 | } |
| 324 | |
| 325 | static inline void unset_pnfs_layoutdriver(struct nfs_server *s) |
| 326 | { |
| 327 | } |
| 328 | |
Fred Isaman | 94ad1c8 | 2011-03-01 01:34:14 +0000 | [diff] [blame] | 329 | static inline void |
| 330 | pnfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, struct inode *ino) |
| 331 | { |
| 332 | pgio->pg_test = NULL; |
| 333 | } |
| 334 | |
Fred Isaman | 44b8379 | 2011-03-03 15:13:44 +0000 | [diff] [blame] | 335 | static inline void |
| 336 | pnfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, struct inode *ino) |
| 337 | { |
| 338 | pgio->pg_test = NULL; |
| 339 | } |
| 340 | |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 341 | static inline void |
| 342 | pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg) |
| 343 | { |
| 344 | } |
| 345 | |
| 346 | static inline int |
| 347 | pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how) |
| 348 | { |
| 349 | return PNFS_NOT_ATTEMPTED; |
| 350 | } |
| 351 | |
| 352 | static inline struct list_head * |
| 353 | pnfs_choose_commit_list(struct nfs_page *req, struct list_head *mds) |
| 354 | { |
| 355 | return mds; |
| 356 | } |
| 357 | |
| 358 | static inline void pnfs_clear_request_commit(struct nfs_page *req) |
| 359 | { |
| 360 | } |
| 361 | |
Andy Adamson | ef31153 | 2011-03-12 02:58:10 -0500 | [diff] [blame] | 362 | static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 363 | { |
| 364 | return 0; |
| 365 | } |
Benny Halevy | 1775bc3 | 2011-05-20 13:47:33 +0200 | [diff] [blame] | 366 | |
| 367 | static inline void nfs4_deviceid_purge_client(struct nfs_client *ncl) |
| 368 | { |
| 369 | } |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 370 | #endif /* CONFIG_NFS_V4_1 */ |
| 371 | |
| 372 | #endif /* FS_NFS_PNFS_H */ |