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 */ |
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 | 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, |
| 71 | }; |
| 72 | |
Benny Halevy | 1775bc3 | 2011-05-20 13:47:33 +0200 | [diff] [blame] | 73 | struct nfs4_deviceid_node; |
| 74 | |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 75 | /* Per-layout driver specific registration structure */ |
| 76 | struct pnfs_layoutdriver_type { |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 77 | struct list_head pnfs_tblid; |
| 78 | const u32 id; |
| 79 | const char *name; |
| 80 | struct module *owner; |
Benny Halevy | 8a1636c | 2010-07-14 15:43:57 -0400 | [diff] [blame] | 81 | unsigned flags; |
Benny Halevy | 636fb9c | 2011-05-22 19:51:33 +0300 | [diff] [blame] | 82 | |
Benny Halevy | 738fd0f3 | 2011-07-30 20:52:36 -0400 | [diff] [blame] | 83 | int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); |
| 84 | int (*clear_layoutdriver) (struct nfs_server *); |
| 85 | |
Benny Halevy | 636fb9c | 2011-05-22 19:51:33 +0300 | [diff] [blame] | 86 | struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); |
| 87 | void (*free_layout_hdr) (struct pnfs_layout_hdr *); |
| 88 | |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 89 | 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] | 90 | void (*free_lseg) (struct pnfs_layout_segment *lseg); |
Fred Isaman | 94ad1c8 | 2011-03-01 01:34:14 +0000 | [diff] [blame] | 91 | |
| 92 | /* test for nfs page cache coalescing */ |
Trond Myklebust | 1751c36 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 93 | const struct nfs_pageio_ops *pg_read_ops; |
| 94 | const struct nfs_pageio_ops *pg_write_ops; |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 95 | |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 96 | /* Returns true if layoutdriver wants to divert this request to |
| 97 | * driver's commit routine. |
| 98 | */ |
| 99 | bool (*mark_pnfs_commit)(struct pnfs_layout_segment *lseg); |
| 100 | struct list_head * (*choose_commit_list) (struct nfs_page *req); |
| 101 | int (*commit_pagelist)(struct inode *inode, struct list_head *mds_pages, int how); |
| 102 | |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 103 | /* |
| 104 | * Return PNFS_ATTEMPTED to indicate the layout code has attempted |
| 105 | * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS |
| 106 | */ |
| 107 | enum pnfs_try_status (*read_pagelist) (struct nfs_read_data *nfs_data); |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 108 | 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] | 109 | |
| 110 | void (*free_deviceid_node) (struct nfs4_deviceid_node *); |
Andy Adamson | 04a5554 | 2011-05-22 19:53:10 +0300 | [diff] [blame] | 111 | |
| 112 | void (*encode_layoutreturn) (struct pnfs_layout_hdr *layoutid, |
| 113 | struct xdr_stream *xdr, |
| 114 | const struct nfs4_layoutreturn_args *args); |
Benny Halevy | ac7db72 | 2011-05-22 19:53:48 +0300 | [diff] [blame] | 115 | |
Andy Adamson | db29c08 | 2011-07-30 20:52:38 -0400 | [diff] [blame] | 116 | void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); |
| 117 | |
Benny Halevy | ac7db72 | 2011-05-22 19:53:48 +0300 | [diff] [blame] | 118 | void (*encode_layoutcommit) (struct pnfs_layout_hdr *layoutid, |
| 119 | struct xdr_stream *xdr, |
| 120 | const struct nfs4_layoutcommit_args *args); |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 121 | }; |
| 122 | |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 123 | struct pnfs_layout_hdr { |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 124 | atomic_t plh_refcount; |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 125 | struct list_head plh_layouts; /* other client layouts */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 126 | struct list_head plh_bulk_recall; /* clnt list of bulk recalls */ |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 127 | struct list_head plh_segs; /* layout segments list */ |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 128 | nfs4_stateid plh_stateid; |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 129 | atomic_t plh_outstanding; /* number of RPCs out */ |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 130 | unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 131 | u32 plh_barrier; /* ignore lower seqids */ |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 132 | unsigned long plh_flags; |
Peng Tao | acff5880 | 2011-07-30 20:52:31 -0400 | [diff] [blame] | 133 | loff_t plh_lwb; /* last write byte for layoutcommit */ |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 134 | struct rpc_cred *plh_lc_cred; /* layoutcommit cred */ |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 135 | struct inode *plh_inode; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 136 | }; |
| 137 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 138 | struct pnfs_device { |
| 139 | struct nfs4_deviceid dev_id; |
| 140 | unsigned int layout_type; |
| 141 | unsigned int mincount; |
| 142 | struct page **pages; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 143 | unsigned int pgbase; |
| 144 | unsigned int pglen; |
| 145 | }; |
| 146 | |
Andy Adamson | 7f11d8d | 2011-07-30 20:52:35 -0400 | [diff] [blame] | 147 | #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 |
| 148 | |
| 149 | struct pnfs_devicelist { |
| 150 | unsigned int eof; |
| 151 | unsigned int num_devs; |
| 152 | struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; |
| 153 | }; |
| 154 | |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 155 | extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); |
| 156 | extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); |
| 157 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 158 | /* nfs4proc.c */ |
Andy Adamson | 7f11d8d | 2011-07-30 20:52:35 -0400 | [diff] [blame] | 159 | extern int nfs4_proc_getdevicelist(struct nfs_server *server, |
| 160 | const struct nfs_fh *fh, |
| 161 | struct pnfs_devicelist *devlist); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 162 | extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, |
| 163 | struct pnfs_device *dev); |
| 164 | extern int nfs4_proc_layoutget(struct nfs4_layoutget *lgp); |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 165 | extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 166 | |
| 167 | /* pnfs.c */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 168 | void get_layout_hdr(struct pnfs_layout_hdr *lo); |
Fred Isaman | bae724e | 2011-03-01 01:34:15 +0000 | [diff] [blame] | 169 | void put_lseg(struct pnfs_layout_segment *lseg); |
Trond Myklebust | 1751c36 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 170 | |
| 171 | bool pnfs_pageio_init_read(struct nfs_pageio_descriptor *, struct inode *); |
| 172 | bool pnfs_pageio_init_write(struct nfs_pageio_descriptor *, struct inode *, int); |
| 173 | |
Benny Halevy | 738fd0f3 | 2011-07-30 20:52:36 -0400 | [diff] [blame] | 174 | void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32); |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 175 | void unset_pnfs_layoutdriver(struct nfs_server *); |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 176 | 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] | 177 | int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 178 | void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *, struct nfs_page *); |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 179 | int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); |
Benny Halevy | 18ad0a9 | 2011-05-25 21:03:56 +0300 | [diff] [blame] | 180 | bool pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, struct nfs_page *req); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 181 | int pnfs_layout_process(struct nfs4_layoutget *lgp); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 182 | void pnfs_free_lseg_list(struct list_head *tmp_list); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 183 | void pnfs_destroy_layout(struct nfs_inode *); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 184 | void pnfs_destroy_all_layouts(struct nfs_client *); |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 185 | void put_layout_hdr(struct pnfs_layout_hdr *lo); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 186 | void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, |
| 187 | const nfs4_stateid *new, |
| 188 | bool update_barrier); |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 189 | int pnfs_choose_layoutget_stateid(nfs4_stateid *dst, |
| 190 | struct pnfs_layout_hdr *lo, |
| 191 | struct nfs4_state *open_state); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 192 | int mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
| 193 | struct list_head *tmp_list, |
Benny Halevy | 778b550 | 2011-05-22 19:48:02 +0300 | [diff] [blame] | 194 | struct pnfs_layout_range *recall_range); |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 195 | bool pnfs_roc(struct inode *ino); |
| 196 | void pnfs_roc_release(struct inode *ino); |
| 197 | void pnfs_roc_set_barrier(struct inode *ino, u32 barrier); |
| 198 | bool pnfs_roc_drain(struct inode *ino, u32 *barrier); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 199 | void pnfs_set_layoutcommit(struct nfs_write_data *wdata); |
Andy Adamson | db29c08 | 2011-07-30 20:52:38 -0400 | [diff] [blame] | 200 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); |
Andy Adamson | ef31153 | 2011-03-12 02:58:10 -0500 | [diff] [blame] | 201 | int pnfs_layoutcommit_inode(struct inode *inode, bool sync); |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 202 | int _pnfs_return_layout(struct inode *); |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 203 | int pnfs_ld_write_done(struct nfs_write_data *); |
| 204 | int pnfs_ld_read_done(struct nfs_read_data *); |
Andy Adamson | 7c24d94 | 2011-06-13 18:22:38 -0400 | [diff] [blame] | 205 | struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, |
| 206 | struct nfs_open_context *ctx, |
| 207 | loff_t pos, |
| 208 | u64 count, |
| 209 | enum pnfs_iomode iomode, |
| 210 | gfp_t gfp_flags); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 211 | |
Andy Adamson | c47abcf | 2011-06-15 17:52:40 -0400 | [diff] [blame] | 212 | void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); |
| 213 | |
| 214 | /* nfs4_deviceid_flags */ |
| 215 | enum { |
| 216 | NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ |
| 217 | }; |
| 218 | |
Benny Halevy | a1eaecb | 2011-05-19 22:14:47 -0400 | [diff] [blame] | 219 | /* pnfs_dev.c */ |
| 220 | struct nfs4_deviceid_node { |
| 221 | struct hlist_node node; |
Weston Andros Adamson | 9e3bd4e | 2011-05-31 21:46:50 -0400 | [diff] [blame] | 222 | struct hlist_node tmpnode; |
Benny Halevy | 1775bc3 | 2011-05-20 13:47:33 +0200 | [diff] [blame] | 223 | const struct pnfs_layoutdriver_type *ld; |
Benny Halevy | a1eaecb | 2011-05-19 22:14:47 -0400 | [diff] [blame] | 224 | const struct nfs_client *nfs_client; |
Andy Adamson | c47abcf | 2011-06-15 17:52:40 -0400 | [diff] [blame] | 225 | unsigned long flags; |
Benny Halevy | a1eaecb | 2011-05-19 22:14:47 -0400 | [diff] [blame] | 226 | struct nfs4_deviceid deviceid; |
| 227 | atomic_t ref; |
| 228 | }; |
| 229 | |
| 230 | void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); |
Benny Halevy | 35c8bb5 | 2011-05-24 18:04:02 +0300 | [diff] [blame] | 231 | 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] | 232 | 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] | 233 | void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, |
Benny Halevy | 1775bc3 | 2011-05-20 13:47:33 +0200 | [diff] [blame] | 234 | const struct pnfs_layoutdriver_type *, |
Benny Halevy | a1eaecb | 2011-05-19 22:14:47 -0400 | [diff] [blame] | 235 | const struct nfs_client *, |
| 236 | const struct nfs4_deviceid *); |
| 237 | struct nfs4_deviceid_node *nfs4_insert_deviceid_node(struct nfs4_deviceid_node *); |
| 238 | bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); |
Benny Halevy | 1775bc3 | 2011-05-20 13:47:33 +0200 | [diff] [blame] | 239 | void nfs4_deviceid_purge_client(const struct nfs_client *); |
Benny Halevy | a1eaecb | 2011-05-19 22:14:47 -0400 | [diff] [blame] | 240 | |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 241 | static inline int lo_fail_bit(u32 iomode) |
| 242 | { |
| 243 | return iomode == IOMODE_RW ? |
| 244 | NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; |
| 245 | } |
| 246 | |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 247 | static inline struct pnfs_layout_segment * |
| 248 | get_lseg(struct pnfs_layout_segment *lseg) |
| 249 | { |
| 250 | if (lseg) { |
| 251 | atomic_inc(&lseg->pls_refcount); |
| 252 | smp_mb__after_atomic_inc(); |
| 253 | } |
| 254 | return lseg; |
| 255 | } |
| 256 | |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 257 | /* Return true if a layout driver is being used for this mountpoint */ |
| 258 | static inline int pnfs_enabled_sb(struct nfs_server *nfss) |
| 259 | { |
| 260 | return nfss->pnfs_curr_ld != NULL; |
| 261 | } |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 262 | |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 263 | static inline void |
| 264 | pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg) |
| 265 | { |
| 266 | if (lseg) { |
| 267 | struct pnfs_layoutdriver_type *ld; |
| 268 | |
| 269 | ld = NFS_SERVER(req->wb_page->mapping->host)->pnfs_curr_ld; |
| 270 | if (ld->mark_pnfs_commit && ld->mark_pnfs_commit(lseg)) { |
| 271 | set_bit(PG_PNFS_COMMIT, &req->wb_flags); |
| 272 | req->wb_commit_lseg = get_lseg(lseg); |
| 273 | } |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | static inline int |
| 278 | pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how) |
| 279 | { |
| 280 | if (!test_and_clear_bit(NFS_INO_PNFS_COMMIT, &NFS_I(inode)->flags)) |
| 281 | return PNFS_NOT_ATTEMPTED; |
| 282 | return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how); |
| 283 | } |
| 284 | |
| 285 | static inline struct list_head * |
| 286 | pnfs_choose_commit_list(struct nfs_page *req, struct list_head *mds) |
| 287 | { |
| 288 | struct list_head *rv; |
| 289 | |
| 290 | if (test_and_clear_bit(PG_PNFS_COMMIT, &req->wb_flags)) { |
| 291 | struct inode *inode = req->wb_commit_lseg->pls_layout->plh_inode; |
| 292 | |
| 293 | set_bit(NFS_INO_PNFS_COMMIT, &NFS_I(inode)->flags); |
| 294 | rv = NFS_SERVER(inode)->pnfs_curr_ld->choose_commit_list(req); |
| 295 | /* matched by ref taken when PG_PNFS_COMMIT is set */ |
| 296 | put_lseg(req->wb_commit_lseg); |
| 297 | } else |
| 298 | rv = mds; |
| 299 | return rv; |
| 300 | } |
| 301 | |
| 302 | static inline void pnfs_clear_request_commit(struct nfs_page *req) |
| 303 | { |
| 304 | if (test_and_clear_bit(PG_PNFS_COMMIT, &req->wb_flags)) |
| 305 | put_lseg(req->wb_commit_lseg); |
| 306 | } |
| 307 | |
Benny Halevy | 8a1636c | 2010-07-14 15:43:57 -0400 | [diff] [blame] | 308 | /* Should the pNFS client commit and return the layout upon a setattr */ |
| 309 | static inline bool |
| 310 | pnfs_ld_layoutret_on_setattr(struct inode *inode) |
| 311 | { |
| 312 | if (!pnfs_enabled_sb(NFS_SERVER(inode))) |
| 313 | return false; |
| 314 | return NFS_SERVER(inode)->pnfs_curr_ld->flags & |
| 315 | PNFS_LAYOUTRET_ON_SETATTR; |
| 316 | } |
| 317 | |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 318 | static inline int pnfs_return_layout(struct inode *ino) |
| 319 | { |
| 320 | struct nfs_inode *nfsi = NFS_I(ino); |
| 321 | struct nfs_server *nfss = NFS_SERVER(ino); |
| 322 | |
| 323 | if (pnfs_enabled_sb(nfss) && nfsi->layout) |
| 324 | return _pnfs_return_layout(ino); |
| 325 | |
| 326 | return 0; |
| 327 | } |
| 328 | |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 329 | #else /* CONFIG_NFS_V4_1 */ |
| 330 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 331 | static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) |
| 332 | { |
| 333 | } |
| 334 | |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 335 | static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) |
| 336 | { |
| 337 | } |
| 338 | |
| 339 | static inline struct pnfs_layout_segment * |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 340 | get_lseg(struct pnfs_layout_segment *lseg) |
| 341 | { |
| 342 | return NULL; |
| 343 | } |
| 344 | |
| 345 | static inline void put_lseg(struct pnfs_layout_segment *lseg) |
| 346 | { |
| 347 | } |
| 348 | |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 349 | static inline int pnfs_return_layout(struct inode *ino) |
| 350 | { |
| 351 | return 0; |
| 352 | } |
| 353 | |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 354 | static inline bool |
Benny Halevy | 8a1636c | 2010-07-14 15:43:57 -0400 | [diff] [blame] | 355 | pnfs_ld_layoutret_on_setattr(struct inode *inode) |
| 356 | { |
| 357 | return false; |
| 358 | } |
| 359 | |
| 360 | static inline bool |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 361 | pnfs_roc(struct inode *ino) |
| 362 | { |
| 363 | return false; |
| 364 | } |
| 365 | |
| 366 | static inline void |
| 367 | pnfs_roc_release(struct inode *ino) |
| 368 | { |
| 369 | } |
| 370 | |
| 371 | static inline void |
| 372 | pnfs_roc_set_barrier(struct inode *ino, u32 barrier) |
| 373 | { |
| 374 | } |
| 375 | |
| 376 | static inline bool |
| 377 | pnfs_roc_drain(struct inode *ino, u32 *barrier) |
| 378 | { |
| 379 | return false; |
| 380 | } |
| 381 | |
Benny Halevy | 738fd0f3 | 2011-07-30 20:52:36 -0400 | [diff] [blame] | 382 | static inline void set_pnfs_layoutdriver(struct nfs_server *s, |
Trond Myklebust | a00ed25 | 2011-07-31 16:39:04 -0400 | [diff] [blame] | 383 | const struct nfs_fh *mntfh, u32 id) |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 384 | { |
| 385 | } |
| 386 | |
| 387 | static inline void unset_pnfs_layoutdriver(struct nfs_server *s) |
| 388 | { |
| 389 | } |
| 390 | |
Trond Myklebust | 1751c36 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 391 | static inline bool pnfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, struct inode *inode) |
Fred Isaman | 94ad1c8 | 2011-03-01 01:34:14 +0000 | [diff] [blame] | 392 | { |
Trond Myklebust | 1751c36 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 393 | return false; |
| 394 | } |
| 395 | |
| 396 | static inline bool pnfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, struct inode *inode, int ioflags) |
| 397 | { |
| 398 | return false; |
Fred Isaman | 44b8379 | 2011-03-03 15:13:44 +0000 | [diff] [blame] | 399 | } |
| 400 | |
Fred Isaman | a861a1e | 2011-03-23 13:27:51 +0000 | [diff] [blame] | 401 | static inline void |
| 402 | pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg) |
| 403 | { |
| 404 | } |
| 405 | |
| 406 | static inline int |
| 407 | pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how) |
| 408 | { |
| 409 | return PNFS_NOT_ATTEMPTED; |
| 410 | } |
| 411 | |
| 412 | static inline struct list_head * |
| 413 | pnfs_choose_commit_list(struct nfs_page *req, struct list_head *mds) |
| 414 | { |
| 415 | return mds; |
| 416 | } |
| 417 | |
| 418 | static inline void pnfs_clear_request_commit(struct nfs_page *req) |
| 419 | { |
| 420 | } |
| 421 | |
Andy Adamson | ef31153 | 2011-03-12 02:58:10 -0500 | [diff] [blame] | 422 | static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 423 | { |
| 424 | return 0; |
| 425 | } |
Benny Halevy | 1775bc3 | 2011-05-20 13:47:33 +0200 | [diff] [blame] | 426 | |
| 427 | static inline void nfs4_deviceid_purge_client(struct nfs_client *ncl) |
| 428 | { |
| 429 | } |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 430 | #endif /* CONFIG_NFS_V4_1 */ |
| 431 | |
| 432 | #endif /* FS_NFS_PNFS_H */ |