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 */ |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 39 | NFS_LSEG_LAYOUTCOMMIT, /* layoutcommit bit set for layoutcommit */ |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 40 | }; |
| 41 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 42 | struct pnfs_layout_segment { |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 43 | struct list_head pls_list; |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 44 | struct list_head pls_lc_list; |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 45 | struct pnfs_layout_range pls_range; |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 46 | atomic_t pls_refcount; |
| 47 | unsigned long pls_flags; |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 48 | struct pnfs_layout_hdr *pls_layout; |
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 */ |
Trond Myklebust | d527e5c | 2012-10-11 13:43:38 -0400 | [diff] [blame] | 65 | NFS_LAYOUT_RETURN, /* Return this layout ASAP */ |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 66 | }; |
| 67 | |
Benny Halevy | 8a1636c | 2010-07-14 15:43:57 -0400 | [diff] [blame] | 68 | enum layoutdriver_policy_flags { |
| 69 | /* Should the pNFS client commit and return the layout upon a setattr */ |
| 70 | PNFS_LAYOUTRET_ON_SETATTR = 1 << 0, |
Boaz Harrosh | fe0fe83 | 2012-01-06 09:31:20 +0200 | [diff] [blame] | 71 | PNFS_LAYOUTRET_ON_ERROR = 1 << 1, |
Benny Halevy | 8a1636c | 2010-07-14 15:43:57 -0400 | [diff] [blame] | 72 | }; |
| 73 | |
Benny Halevy | 1775bc3 | 2011-05-20 13:47:33 +0200 | [diff] [blame] | 74 | struct nfs4_deviceid_node; |
| 75 | |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 76 | /* Per-layout driver specific registration structure */ |
| 77 | struct pnfs_layoutdriver_type { |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 78 | struct list_head pnfs_tblid; |
| 79 | const u32 id; |
| 80 | const char *name; |
| 81 | struct module *owner; |
Benny Halevy | 8a1636c | 2010-07-14 15:43:57 -0400 | [diff] [blame] | 82 | unsigned flags; |
Benny Halevy | 636fb9c | 2011-05-22 19:51:33 +0300 | [diff] [blame] | 83 | |
Benny Halevy | 738fd0f3 | 2011-07-30 20:52:36 -0400 | [diff] [blame] | 84 | int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); |
| 85 | int (*clear_layoutdriver) (struct nfs_server *); |
| 86 | |
Benny Halevy | 636fb9c | 2011-05-22 19:51:33 +0300 | [diff] [blame] | 87 | struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); |
| 88 | void (*free_layout_hdr) (struct pnfs_layout_hdr *); |
| 89 | |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 90 | 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] | 91 | void (*free_lseg) (struct pnfs_layout_segment *lseg); |
Fred Isaman | 94ad1c8 | 2011-03-01 01:34:14 +0000 | [diff] [blame] | 92 | |
| 93 | /* test for nfs page cache coalescing */ |
Trond Myklebust | 1751c36 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 94 | const struct nfs_pageio_ops *pg_read_ops; |
| 95 | const struct nfs_pageio_ops *pg_write_ops; |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 96 | |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 97 | struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 98 | void (*mark_request_commit) (struct nfs_page *req, |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 99 | struct pnfs_layout_segment *lseg, |
| 100 | struct nfs_commit_info *cinfo); |
| 101 | void (*clear_request_commit) (struct nfs_page *req, |
| 102 | struct nfs_commit_info *cinfo); |
| 103 | int (*scan_commit_lists) (struct nfs_commit_info *cinfo, |
| 104 | int max); |
Fred Isaman | 1763da1 | 2012-04-20 14:47:57 -0400 | [diff] [blame] | 105 | void (*recover_commit_reqs) (struct list_head *list, |
| 106 | struct nfs_commit_info *cinfo); |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 107 | int (*commit_pagelist)(struct inode *inode, |
| 108 | struct list_head *mds_pages, |
| 109 | int how, |
| 110 | struct nfs_commit_info *cinfo); |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 111 | |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 112 | /* |
| 113 | * Return PNFS_ATTEMPTED to indicate the layout code has attempted |
| 114 | * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS |
| 115 | */ |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame^] | 116 | enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *); |
| 117 | enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int); |
Benny Halevy | 1775bc3 | 2011-05-20 13:47:33 +0200 | [diff] [blame] | 118 | |
| 119 | void (*free_deviceid_node) (struct nfs4_deviceid_node *); |
Andy Adamson | 04a5554 | 2011-05-22 19:53:10 +0300 | [diff] [blame] | 120 | |
| 121 | void (*encode_layoutreturn) (struct pnfs_layout_hdr *layoutid, |
| 122 | struct xdr_stream *xdr, |
| 123 | const struct nfs4_layoutreturn_args *args); |
Benny Halevy | ac7db72 | 2011-05-22 19:53:48 +0300 | [diff] [blame] | 124 | |
Andy Adamson | db29c08 | 2011-07-30 20:52:38 -0400 | [diff] [blame] | 125 | void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); |
| 126 | |
Benny Halevy | ac7db72 | 2011-05-22 19:53:48 +0300 | [diff] [blame] | 127 | void (*encode_layoutcommit) (struct pnfs_layout_hdr *layoutid, |
| 128 | struct xdr_stream *xdr, |
| 129 | const struct nfs4_layoutcommit_args *args); |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 130 | }; |
| 131 | |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 132 | struct pnfs_layout_hdr { |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 133 | atomic_t plh_refcount; |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 134 | struct list_head plh_layouts; /* other client layouts */ |
Trond Myklebust | fd9a8d7 | 2013-02-12 09:48:42 -0500 | [diff] [blame] | 135 | struct list_head plh_bulk_destroy; |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 136 | struct list_head plh_segs; /* layout segments list */ |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 137 | nfs4_stateid plh_stateid; |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 138 | atomic_t plh_outstanding; /* number of RPCs out */ |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 139 | unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 140 | u32 plh_barrier; /* ignore lower seqids */ |
Trond Myklebust | 25c7533 | 2012-09-18 17:01:12 -0400 | [diff] [blame] | 141 | unsigned long plh_retry_timestamp; |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 142 | unsigned long plh_flags; |
Peng Tao | acff5880 | 2011-07-30 20:52:31 -0400 | [diff] [blame] | 143 | loff_t plh_lwb; /* last write byte for layoutcommit */ |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 144 | struct rpc_cred *plh_lc_cred; /* layoutcommit cred */ |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 145 | struct inode *plh_inode; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 146 | }; |
| 147 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 148 | struct pnfs_device { |
| 149 | struct nfs4_deviceid dev_id; |
| 150 | unsigned int layout_type; |
| 151 | unsigned int mincount; |
Andy Adamson | f1c097b | 2013-06-25 19:02:53 -0400 | [diff] [blame] | 152 | unsigned int maxcount; /* gdia_maxcount */ |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 153 | struct page **pages; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 154 | unsigned int pgbase; |
Andy Adamson | f1c097b | 2013-06-25 19:02:53 -0400 | [diff] [blame] | 155 | unsigned int pglen; /* reply buffer length */ |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 156 | }; |
| 157 | |
Andy Adamson | 7f11d8d | 2011-07-30 20:52:35 -0400 | [diff] [blame] | 158 | #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 |
| 159 | |
| 160 | struct pnfs_devicelist { |
| 161 | unsigned int eof; |
| 162 | unsigned int num_devs; |
| 163 | struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; |
| 164 | }; |
| 165 | |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 166 | extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); |
| 167 | extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); |
| 168 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 169 | /* nfs4proc.c */ |
Andy Adamson | 7f11d8d | 2011-07-30 20:52:35 -0400 | [diff] [blame] | 170 | extern int nfs4_proc_getdevicelist(struct nfs_server *server, |
| 171 | const struct nfs_fh *fh, |
| 172 | struct pnfs_devicelist *devlist); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 173 | extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, |
Trond Myklebust | cd5875f | 2013-05-20 11:42:54 -0400 | [diff] [blame] | 174 | struct pnfs_device *dev, |
| 175 | struct rpc_cred *cred); |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 176 | extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags); |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 177 | extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 178 | |
| 179 | /* pnfs.c */ |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 180 | void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 181 | void pnfs_put_lseg(struct pnfs_layout_segment *lseg); |
Trond Myklebust | 1751c36 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 182 | |
Benny Halevy | 738fd0f3 | 2011-07-30 20:52:36 -0400 | [diff] [blame] | 183 | void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32); |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 184 | void unset_pnfs_layoutdriver(struct nfs_server *); |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 185 | void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 186 | int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); |
Peng Tao | 6296556 | 2012-09-25 14:55:57 +0800 | [diff] [blame] | 187 | void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, |
| 188 | struct nfs_page *req, u64 wb_size); |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 189 | int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); |
Weston Andros Adamson | b4fdac1 | 2014-05-15 11:56:43 -0400 | [diff] [blame] | 190 | size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, |
| 191 | struct nfs_page *prev, struct nfs_page *req); |
Peng Tao | 1b0ae06 | 2011-09-22 21:50:12 -0400 | [diff] [blame] | 192 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 193 | struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 194 | void pnfs_free_lseg_list(struct list_head *tmp_list); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 195 | void pnfs_destroy_layout(struct nfs_inode *); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 196 | void pnfs_destroy_all_layouts(struct nfs_client *); |
Trond Myklebust | fd9a8d7 | 2013-02-12 09:48:42 -0500 | [diff] [blame] | 197 | int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, |
| 198 | struct nfs_fsid *fsid, |
| 199 | bool is_recall); |
| 200 | int pnfs_destroy_layouts_byclid(struct nfs_client *clp, |
| 201 | bool is_recall); |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 202 | void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 203 | void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, |
| 204 | const nfs4_stateid *new, |
| 205 | bool update_barrier); |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 206 | int pnfs_choose_layoutget_stateid(nfs4_stateid *dst, |
| 207 | struct pnfs_layout_hdr *lo, |
| 208 | struct nfs4_state *open_state); |
Trond Myklebust | 49a8506 | 2012-09-18 20:43:31 -0400 | [diff] [blame] | 209 | int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 210 | struct list_head *tmp_list, |
Benny Halevy | 778b550 | 2011-05-22 19:48:02 +0300 | [diff] [blame] | 211 | struct pnfs_layout_range *recall_range); |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 212 | bool pnfs_roc(struct inode *ino); |
| 213 | void pnfs_roc_release(struct inode *ino); |
| 214 | void pnfs_roc_set_barrier(struct inode *ino, u32 barrier); |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 215 | bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task); |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame^] | 216 | void pnfs_set_layoutcommit(struct nfs_pgio_header *); |
Andy Adamson | db29c08 | 2011-07-30 20:52:38 -0400 | [diff] [blame] | 217 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); |
Andy Adamson | ef31153 | 2011-03-12 02:58:10 -0500 | [diff] [blame] | 218 | int pnfs_layoutcommit_inode(struct inode *inode, bool sync); |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 219 | int _pnfs_return_layout(struct inode *); |
Trond Myklebust | 2402867 | 2013-03-20 13:23:33 -0400 | [diff] [blame] | 220 | int pnfs_commit_and_return_layout(struct inode *); |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame^] | 221 | void pnfs_ld_write_done(struct nfs_pgio_header *); |
| 222 | void pnfs_ld_read_done(struct nfs_pgio_header *); |
Andy Adamson | 7c24d94 | 2011-06-13 18:22:38 -0400 | [diff] [blame] | 223 | struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, |
| 224 | struct nfs_open_context *ctx, |
| 225 | loff_t pos, |
| 226 | u64 count, |
| 227 | enum pnfs_iomode iomode, |
| 228 | gfp_t gfp_flags); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 229 | |
Andy Adamson | c47abcf | 2011-06-15 17:52:40 -0400 | [diff] [blame] | 230 | void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); |
Andy Adamson | e7dd79af | 2012-04-27 17:53:46 -0400 | [diff] [blame] | 231 | int pnfs_read_done_resend_to_mds(struct inode *inode, struct list_head *head, |
Benny Halevy | 78f3327 | 2013-02-24 09:55:57 -0500 | [diff] [blame] | 232 | const struct nfs_pgio_completion_ops *compl_ops, |
| 233 | struct nfs_direct_req *dreq); |
Andy Adamson | e7dd79af | 2012-04-27 17:53:46 -0400 | [diff] [blame] | 234 | int pnfs_write_done_resend_to_mds(struct inode *inode, struct list_head *head, |
Benny Halevy | 78f3327 | 2013-02-24 09:55:57 -0500 | [diff] [blame] | 235 | const struct nfs_pgio_completion_ops *compl_ops, |
| 236 | struct nfs_direct_req *dreq); |
Andy Adamson | 82be417 | 2012-05-23 05:02:35 -0400 | [diff] [blame] | 237 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); |
Andy Adamson | c47abcf | 2011-06-15 17:52:40 -0400 | [diff] [blame] | 238 | |
| 239 | /* nfs4_deviceid_flags */ |
| 240 | enum { |
| 241 | NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ |
Trond Myklebust | 1dfed27 | 2012-09-18 19:51:12 -0400 | [diff] [blame] | 242 | NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ |
Andy Adamson | c47abcf | 2011-06-15 17:52:40 -0400 | [diff] [blame] | 243 | }; |
| 244 | |
Benny Halevy | a1eaecb | 2011-05-19 22:14:47 -0400 | [diff] [blame] | 245 | /* pnfs_dev.c */ |
| 246 | struct nfs4_deviceid_node { |
| 247 | struct hlist_node node; |
Weston Andros Adamson | 9e3bd4e | 2011-05-31 21:46:50 -0400 | [diff] [blame] | 248 | struct hlist_node tmpnode; |
Benny Halevy | 1775bc3 | 2011-05-20 13:47:33 +0200 | [diff] [blame] | 249 | const struct pnfs_layoutdriver_type *ld; |
Benny Halevy | a1eaecb | 2011-05-19 22:14:47 -0400 | [diff] [blame] | 250 | const struct nfs_client *nfs_client; |
Andy Adamson | c47abcf | 2011-06-15 17:52:40 -0400 | [diff] [blame] | 251 | unsigned long flags; |
Trond Myklebust | 1dfed27 | 2012-09-18 19:51:12 -0400 | [diff] [blame] | 252 | unsigned long timestamp_unavailable; |
Benny Halevy | a1eaecb | 2011-05-19 22:14:47 -0400 | [diff] [blame] | 253 | struct nfs4_deviceid deviceid; |
| 254 | atomic_t ref; |
| 255 | }; |
| 256 | |
Benny Halevy | 35c8bb5 | 2011-05-24 18:04:02 +0300 | [diff] [blame] | 257 | struct nfs4_deviceid_node *nfs4_find_get_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); |
Benny Halevy | 35c8bb5 | 2011-05-24 18:04:02 +0300 | [diff] [blame] | 258 | 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] | 259 | void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, |
Benny Halevy | 1775bc3 | 2011-05-20 13:47:33 +0200 | [diff] [blame] | 260 | const struct pnfs_layoutdriver_type *, |
Benny Halevy | a1eaecb | 2011-05-19 22:14:47 -0400 | [diff] [blame] | 261 | const struct nfs_client *, |
| 262 | const struct nfs4_deviceid *); |
| 263 | struct nfs4_deviceid_node *nfs4_insert_deviceid_node(struct nfs4_deviceid_node *); |
| 264 | bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); |
Trond Myklebust | 1dfed27 | 2012-09-18 19:51:12 -0400 | [diff] [blame] | 265 | void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); |
| 266 | bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); |
Benny Halevy | 1775bc3 | 2011-05-20 13:47:33 +0200 | [diff] [blame] | 267 | void nfs4_deviceid_purge_client(const struct nfs_client *); |
Benny Halevy | a1eaecb | 2011-05-19 22:14:47 -0400 | [diff] [blame] | 268 | |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 269 | static inline struct pnfs_layout_segment * |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 270 | pnfs_get_lseg(struct pnfs_layout_segment *lseg) |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 271 | { |
| 272 | if (lseg) { |
| 273 | atomic_inc(&lseg->pls_refcount); |
Peter Zijlstra | 4e857c5 | 2014-03-17 18:06:10 +0100 | [diff] [blame] | 274 | smp_mb__after_atomic(); |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 275 | } |
| 276 | return lseg; |
| 277 | } |
| 278 | |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 279 | /* Return true if a layout driver is being used for this mountpoint */ |
| 280 | static inline int pnfs_enabled_sb(struct nfs_server *nfss) |
| 281 | { |
| 282 | return nfss->pnfs_curr_ld != NULL; |
| 283 | } |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 284 | |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 285 | static inline int |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 286 | pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, |
| 287 | struct nfs_commit_info *cinfo) |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 288 | { |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 289 | if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0) |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 290 | return PNFS_NOT_ATTEMPTED; |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 291 | return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo); |
| 292 | } |
| 293 | |
| 294 | static inline struct pnfs_ds_commit_info * |
| 295 | pnfs_get_ds_info(struct inode *inode) |
| 296 | { |
| 297 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
| 298 | |
| 299 | if (ld == NULL || ld->get_ds_info == NULL) |
| 300 | return NULL; |
| 301 | return ld->get_ds_info(inode); |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 302 | } |
| 303 | |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 304 | static inline bool |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 305 | pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, |
| 306 | struct nfs_commit_info *cinfo) |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 307 | { |
Fred Isaman | d6d6dc7 | 2012-03-08 17:29:35 -0500 | [diff] [blame] | 308 | struct inode *inode = req->wb_context->dentry->d_inode; |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 309 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 310 | |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 311 | if (lseg == NULL || ld->mark_request_commit == NULL) |
| 312 | return false; |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 313 | ld->mark_request_commit(req, lseg, cinfo); |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 314 | return true; |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 315 | } |
| 316 | |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 317 | static inline bool |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 318 | pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 319 | { |
Fred Isaman | d6d6dc7 | 2012-03-08 17:29:35 -0500 | [diff] [blame] | 320 | struct inode *inode = req->wb_context->dentry->d_inode; |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 321 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
Fred Isaman | d6d6dc7 | 2012-03-08 17:29:35 -0500 | [diff] [blame] | 322 | |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 323 | if (ld == NULL || ld->clear_request_commit == NULL) |
| 324 | return false; |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 325 | ld->clear_request_commit(req, cinfo); |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 326 | return true; |
Fred Isaman | d6d6dc7 | 2012-03-08 17:29:35 -0500 | [diff] [blame] | 327 | } |
| 328 | |
| 329 | static inline int |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 330 | pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, |
| 331 | int max) |
Fred Isaman | d6d6dc7 | 2012-03-08 17:29:35 -0500 | [diff] [blame] | 332 | { |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 333 | if (cinfo->ds == NULL || cinfo->ds->nwritten == 0) |
Fred Isaman | d6d6dc7 | 2012-03-08 17:29:35 -0500 | [diff] [blame] | 334 | return 0; |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 335 | else |
| 336 | return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max); |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 337 | } |
| 338 | |
Fred Isaman | 1763da1 | 2012-04-20 14:47:57 -0400 | [diff] [blame] | 339 | static inline void |
| 340 | pnfs_recover_commit_reqs(struct inode *inode, struct list_head *list, |
| 341 | struct nfs_commit_info *cinfo) |
| 342 | { |
| 343 | if (cinfo->ds == NULL || cinfo->ds->nwritten == 0) |
| 344 | return; |
| 345 | NFS_SERVER(inode)->pnfs_curr_ld->recover_commit_reqs(list, cinfo); |
| 346 | } |
| 347 | |
Benny Halevy | 8a1636c | 2010-07-14 15:43:57 -0400 | [diff] [blame] | 348 | /* Should the pNFS client commit and return the layout upon a setattr */ |
| 349 | static inline bool |
| 350 | pnfs_ld_layoutret_on_setattr(struct inode *inode) |
| 351 | { |
| 352 | if (!pnfs_enabled_sb(NFS_SERVER(inode))) |
| 353 | return false; |
| 354 | return NFS_SERVER(inode)->pnfs_curr_ld->flags & |
| 355 | PNFS_LAYOUTRET_ON_SETATTR; |
| 356 | } |
| 357 | |
Trond Myklebust | d8c951c | 2014-01-13 12:08:11 -0500 | [diff] [blame] | 358 | static inline bool |
| 359 | pnfs_layoutcommit_outstanding(struct inode *inode) |
| 360 | { |
| 361 | struct nfs_inode *nfsi = NFS_I(inode); |
| 362 | |
| 363 | return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || |
| 364 | test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; |
| 365 | } |
| 366 | |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 367 | static inline int pnfs_return_layout(struct inode *ino) |
| 368 | { |
| 369 | struct nfs_inode *nfsi = NFS_I(ino); |
| 370 | struct nfs_server *nfss = NFS_SERVER(ino); |
| 371 | |
| 372 | if (pnfs_enabled_sb(nfss) && nfsi->layout) |
| 373 | return _pnfs_return_layout(ino); |
| 374 | |
| 375 | return 0; |
| 376 | } |
| 377 | |
Andy Adamson | 82be417 | 2012-05-23 05:02:35 -0400 | [diff] [blame] | 378 | static inline bool |
| 379 | pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, |
| 380 | struct nfs_server *nfss) |
| 381 | { |
Fred Isaman | fb47ddc | 2012-06-07 11:42:12 -0400 | [diff] [blame] | 382 | return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && |
Andy Adamson | 82be417 | 2012-05-23 05:02:35 -0400 | [diff] [blame] | 383 | nfss->pnfs_curr_ld->id == src->l_type); |
| 384 | } |
| 385 | |
Trond Myklebust | 6f00866 | 2012-03-20 14:12:46 -0400 | [diff] [blame] | 386 | #ifdef NFS_DEBUG |
| 387 | void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); |
| 388 | #else |
| 389 | static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) |
| 390 | { |
| 391 | } |
| 392 | #endif /* NFS_DEBUG */ |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 393 | #else /* CONFIG_NFS_V4_1 */ |
| 394 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 395 | static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) |
| 396 | { |
| 397 | } |
| 398 | |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 399 | static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) |
| 400 | { |
| 401 | } |
| 402 | |
| 403 | static inline struct pnfs_layout_segment * |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 404 | pnfs_get_lseg(struct pnfs_layout_segment *lseg) |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 405 | { |
| 406 | return NULL; |
| 407 | } |
| 408 | |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 409 | static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 410 | { |
| 411 | } |
| 412 | |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 413 | static inline int pnfs_return_layout(struct inode *ino) |
| 414 | { |
| 415 | return 0; |
| 416 | } |
| 417 | |
Trond Myklebust | 2402867 | 2013-03-20 13:23:33 -0400 | [diff] [blame] | 418 | static inline int pnfs_commit_and_return_layout(struct inode *inode) |
| 419 | { |
| 420 | return 0; |
| 421 | } |
| 422 | |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 423 | static inline bool |
Benny Halevy | 8a1636c | 2010-07-14 15:43:57 -0400 | [diff] [blame] | 424 | pnfs_ld_layoutret_on_setattr(struct inode *inode) |
| 425 | { |
| 426 | return false; |
| 427 | } |
| 428 | |
| 429 | static inline bool |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 430 | pnfs_roc(struct inode *ino) |
| 431 | { |
| 432 | return false; |
| 433 | } |
| 434 | |
| 435 | static inline void |
| 436 | pnfs_roc_release(struct inode *ino) |
| 437 | { |
| 438 | } |
| 439 | |
| 440 | static inline void |
| 441 | pnfs_roc_set_barrier(struct inode *ino, u32 barrier) |
| 442 | { |
| 443 | } |
| 444 | |
| 445 | static inline bool |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 446 | pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task) |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 447 | { |
| 448 | return false; |
| 449 | } |
| 450 | |
Benny Halevy | 738fd0f3 | 2011-07-30 20:52:36 -0400 | [diff] [blame] | 451 | static inline void set_pnfs_layoutdriver(struct nfs_server *s, |
Trond Myklebust | a00ed25 | 2011-07-31 16:39:04 -0400 | [diff] [blame] | 452 | const struct nfs_fh *mntfh, u32 id) |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 453 | { |
| 454 | } |
| 455 | |
| 456 | static inline void unset_pnfs_layoutdriver(struct nfs_server *s) |
| 457 | { |
| 458 | } |
| 459 | |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 460 | static inline int |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 461 | pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, |
| 462 | struct nfs_commit_info *cinfo) |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 463 | { |
| 464 | return PNFS_NOT_ATTEMPTED; |
| 465 | } |
| 466 | |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 467 | static inline struct pnfs_ds_commit_info * |
| 468 | pnfs_get_ds_info(struct inode *inode) |
| 469 | { |
| 470 | return NULL; |
| 471 | } |
| 472 | |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 473 | static inline bool |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 474 | pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, |
| 475 | struct nfs_commit_info *cinfo) |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 476 | { |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 477 | return false; |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 478 | } |
| 479 | |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 480 | static inline bool |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 481 | pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 482 | { |
Trond Myklebust | 8dd3775 | 2012-03-15 17:16:40 -0400 | [diff] [blame] | 483 | return false; |
Fred Isaman | d6d6dc7 | 2012-03-08 17:29:35 -0500 | [diff] [blame] | 484 | } |
| 485 | |
| 486 | static inline int |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 487 | pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, |
| 488 | int max) |
Fred Isaman | d6d6dc7 | 2012-03-08 17:29:35 -0500 | [diff] [blame] | 489 | { |
| 490 | return 0; |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 491 | } |
| 492 | |
Fred Isaman | 1763da1 | 2012-04-20 14:47:57 -0400 | [diff] [blame] | 493 | static inline void |
| 494 | pnfs_recover_commit_reqs(struct inode *inode, struct list_head *list, |
| 495 | struct nfs_commit_info *cinfo) |
| 496 | { |
| 497 | } |
| 498 | |
Andy Adamson | ef31153 | 2011-03-12 02:58:10 -0500 | [diff] [blame] | 499 | static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 500 | { |
| 501 | return 0; |
| 502 | } |
Benny Halevy | 1775bc3 | 2011-05-20 13:47:33 +0200 | [diff] [blame] | 503 | |
Andy Adamson | 82be417 | 2012-05-23 05:02:35 -0400 | [diff] [blame] | 504 | static inline bool |
| 505 | pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, |
| 506 | struct nfs_server *nfss) |
| 507 | { |
| 508 | return false; |
| 509 | } |
| 510 | |
Trond Myklebust | d8c951c | 2014-01-13 12:08:11 -0500 | [diff] [blame] | 511 | static inline bool |
| 512 | pnfs_layoutcommit_outstanding(struct inode *inode) |
| 513 | { |
| 514 | return false; |
| 515 | } |
| 516 | |
| 517 | |
Andy Adamson | 82be417 | 2012-05-23 05:02:35 -0400 | [diff] [blame] | 518 | static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) |
| 519 | { |
| 520 | return NULL; |
| 521 | } |
| 522 | |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 523 | #endif /* CONFIG_NFS_V4_1 */ |
| 524 | |
| 525 | #endif /* FS_NFS_PNFS_H */ |