Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 1 | /* |
| 2 | * pNFS functions to call and manage layout drivers. |
| 3 | * |
| 4 | * Copyright (c) 2002 [year of first publication] |
| 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 | #include <linux/nfs_fs.h> |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 31 | #include <linux/nfs_page.h> |
Paul Gortmaker | 143cb49 | 2011-07-01 14:23:34 -0400 | [diff] [blame] | 32 | #include <linux/module.h> |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 33 | #include "internal.h" |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 34 | #include "pnfs.h" |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 35 | #include "iostat.h" |
Trond Myklebust | cc668ab | 2013-08-14 15:31:28 -0400 | [diff] [blame] | 36 | #include "nfs4trace.h" |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 37 | |
| 38 | #define NFSDBG_FACILITY NFSDBG_PNFS |
Trond Myklebust | 25c7533 | 2012-09-18 17:01:12 -0400 | [diff] [blame] | 39 | #define PNFS_LAYOUTGET_RETRY_TIMEOUT (120*HZ) |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 40 | |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 41 | /* Locking: |
| 42 | * |
| 43 | * pnfs_spinlock: |
| 44 | * protects pnfs_modules_tbl. |
| 45 | */ |
| 46 | static DEFINE_SPINLOCK(pnfs_spinlock); |
| 47 | |
| 48 | /* |
| 49 | * pnfs_modules_tbl holds all pnfs modules |
| 50 | */ |
| 51 | static LIST_HEAD(pnfs_modules_tbl); |
| 52 | |
Peng Tao | aa1e0e3a | 2014-09-06 00:53:25 +0800 | [diff] [blame] | 53 | static int |
| 54 | pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, nfs4_stateid stateid, |
Peng Tao | 6c16605 | 2014-11-17 09:30:40 +0800 | [diff] [blame^] | 55 | enum pnfs_iomode iomode, bool sync); |
Peng Tao | aa1e0e3a | 2014-09-06 00:53:25 +0800 | [diff] [blame] | 56 | |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 57 | /* Return the registered pnfs layout driver module matching given id */ |
| 58 | static struct pnfs_layoutdriver_type * |
| 59 | find_pnfs_driver_locked(u32 id) |
| 60 | { |
| 61 | struct pnfs_layoutdriver_type *local; |
| 62 | |
| 63 | list_for_each_entry(local, &pnfs_modules_tbl, pnfs_tblid) |
| 64 | if (local->id == id) |
| 65 | goto out; |
| 66 | local = NULL; |
| 67 | out: |
| 68 | dprintk("%s: Searching for id %u, found %p\n", __func__, id, local); |
| 69 | return local; |
| 70 | } |
| 71 | |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 72 | static struct pnfs_layoutdriver_type * |
| 73 | find_pnfs_driver(u32 id) |
| 74 | { |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 75 | struct pnfs_layoutdriver_type *local; |
| 76 | |
| 77 | spin_lock(&pnfs_spinlock); |
| 78 | local = find_pnfs_driver_locked(id); |
Trond Myklebust | 0a9c63f | 2012-06-15 13:02:58 -0400 | [diff] [blame] | 79 | if (local != NULL && !try_module_get(local->owner)) { |
| 80 | dprintk("%s: Could not grab reference on module\n", __func__); |
| 81 | local = NULL; |
| 82 | } |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 83 | spin_unlock(&pnfs_spinlock); |
| 84 | return local; |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 85 | } |
| 86 | |
| 87 | void |
| 88 | unset_pnfs_layoutdriver(struct nfs_server *nfss) |
| 89 | { |
Benny Halevy | 738fd0f3 | 2011-07-30 20:52:36 -0400 | [diff] [blame] | 90 | if (nfss->pnfs_curr_ld) { |
| 91 | if (nfss->pnfs_curr_ld->clear_layoutdriver) |
| 92 | nfss->pnfs_curr_ld->clear_layoutdriver(nfss); |
Trond Myklebust | 2a4c899 | 2012-06-14 13:08:38 -0400 | [diff] [blame] | 93 | /* Decrement the MDS count. Purge the deviceid cache if zero */ |
| 94 | if (atomic_dec_and_test(&nfss->nfs_client->cl_mds_count)) |
| 95 | nfs4_deviceid_purge_client(nfss->nfs_client); |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 96 | module_put(nfss->pnfs_curr_ld->owner); |
Benny Halevy | 738fd0f3 | 2011-07-30 20:52:36 -0400 | [diff] [blame] | 97 | } |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 98 | nfss->pnfs_curr_ld = NULL; |
| 99 | } |
| 100 | |
| 101 | /* |
| 102 | * Try to set the server's pnfs module to the pnfs layout type specified by id. |
| 103 | * Currently only one pNFS layout driver per filesystem is supported. |
| 104 | * |
| 105 | * @id layout type. Zero (illegal layout type) indicates pNFS not in use. |
| 106 | */ |
| 107 | void |
Benny Halevy | 738fd0f3 | 2011-07-30 20:52:36 -0400 | [diff] [blame] | 108 | set_pnfs_layoutdriver(struct nfs_server *server, const struct nfs_fh *mntfh, |
| 109 | u32 id) |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 110 | { |
| 111 | struct pnfs_layoutdriver_type *ld_type = NULL; |
| 112 | |
| 113 | if (id == 0) |
| 114 | goto out_no_driver; |
| 115 | if (!(server->nfs_client->cl_exchange_flags & |
| 116 | (EXCHGID4_FLAG_USE_NON_PNFS | EXCHGID4_FLAG_USE_PNFS_MDS))) { |
Weston Andros Adamson | a030889 | 2012-01-26 13:32:23 -0500 | [diff] [blame] | 117 | printk(KERN_ERR "NFS: %s: id %u cl_exchange_flags 0x%x\n", |
| 118 | __func__, id, server->nfs_client->cl_exchange_flags); |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 119 | goto out_no_driver; |
| 120 | } |
| 121 | ld_type = find_pnfs_driver(id); |
| 122 | if (!ld_type) { |
| 123 | request_module("%s-%u", LAYOUT_NFSV4_1_MODULE_PREFIX, id); |
| 124 | ld_type = find_pnfs_driver(id); |
| 125 | if (!ld_type) { |
| 126 | dprintk("%s: No pNFS module found for %u.\n", |
| 127 | __func__, id); |
| 128 | goto out_no_driver; |
| 129 | } |
| 130 | } |
| 131 | server->pnfs_curr_ld = ld_type; |
Benny Halevy | 738fd0f3 | 2011-07-30 20:52:36 -0400 | [diff] [blame] | 132 | if (ld_type->set_layoutdriver |
| 133 | && ld_type->set_layoutdriver(server, mntfh)) { |
Weston Andros Adamson | a030889 | 2012-01-26 13:32:23 -0500 | [diff] [blame] | 134 | printk(KERN_ERR "NFS: %s: Error initializing pNFS layout " |
| 135 | "driver %u.\n", __func__, id); |
Benny Halevy | 738fd0f3 | 2011-07-30 20:52:36 -0400 | [diff] [blame] | 136 | module_put(ld_type->owner); |
| 137 | goto out_no_driver; |
| 138 | } |
Trond Myklebust | 2a4c899 | 2012-06-14 13:08:38 -0400 | [diff] [blame] | 139 | /* Bump the MDS count */ |
| 140 | atomic_inc(&server->nfs_client->cl_mds_count); |
Christoph Hellwig | ea8eecd | 2011-03-01 01:34:21 +0000 | [diff] [blame] | 141 | |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 142 | dprintk("%s: pNFS module for %u set\n", __func__, id); |
| 143 | return; |
| 144 | |
| 145 | out_no_driver: |
| 146 | dprintk("%s: Using NFSv4 I/O\n", __func__); |
| 147 | server->pnfs_curr_ld = NULL; |
| 148 | } |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 149 | |
| 150 | int |
| 151 | pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *ld_type) |
| 152 | { |
| 153 | int status = -EINVAL; |
| 154 | struct pnfs_layoutdriver_type *tmp; |
| 155 | |
| 156 | if (ld_type->id == 0) { |
Weston Andros Adamson | a030889 | 2012-01-26 13:32:23 -0500 | [diff] [blame] | 157 | printk(KERN_ERR "NFS: %s id 0 is reserved\n", __func__); |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 158 | return status; |
| 159 | } |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 160 | if (!ld_type->alloc_lseg || !ld_type->free_lseg) { |
Weston Andros Adamson | a030889 | 2012-01-26 13:32:23 -0500 | [diff] [blame] | 161 | printk(KERN_ERR "NFS: %s Layout driver must provide " |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 162 | "alloc_lseg and free_lseg.\n", __func__); |
| 163 | return status; |
| 164 | } |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 165 | |
| 166 | spin_lock(&pnfs_spinlock); |
| 167 | tmp = find_pnfs_driver_locked(ld_type->id); |
| 168 | if (!tmp) { |
| 169 | list_add(&ld_type->pnfs_tblid, &pnfs_modules_tbl); |
| 170 | status = 0; |
| 171 | dprintk("%s Registering id:%u name:%s\n", __func__, ld_type->id, |
| 172 | ld_type->name); |
| 173 | } else { |
Weston Andros Adamson | a030889 | 2012-01-26 13:32:23 -0500 | [diff] [blame] | 174 | printk(KERN_ERR "NFS: %s Module with id %d already loaded!\n", |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 175 | __func__, ld_type->id); |
| 176 | } |
| 177 | spin_unlock(&pnfs_spinlock); |
| 178 | |
| 179 | return status; |
| 180 | } |
| 181 | EXPORT_SYMBOL_GPL(pnfs_register_layoutdriver); |
| 182 | |
| 183 | void |
| 184 | pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *ld_type) |
| 185 | { |
| 186 | dprintk("%s Deregistering id:%u\n", __func__, ld_type->id); |
| 187 | spin_lock(&pnfs_spinlock); |
| 188 | list_del(&ld_type->pnfs_tblid); |
| 189 | spin_unlock(&pnfs_spinlock); |
| 190 | } |
| 191 | EXPORT_SYMBOL_GPL(pnfs_unregister_layoutdriver); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 192 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 193 | /* |
| 194 | * pNFS client layout cache |
| 195 | */ |
| 196 | |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 197 | /* Need to hold i_lock if caller does not already hold reference */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 198 | void |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 199 | pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 200 | { |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 201 | atomic_inc(&lo->plh_refcount); |
| 202 | } |
| 203 | |
Benny Halevy | 636fb9c | 2011-05-22 19:51:33 +0300 | [diff] [blame] | 204 | static struct pnfs_layout_hdr * |
| 205 | pnfs_alloc_layout_hdr(struct inode *ino, gfp_t gfp_flags) |
| 206 | { |
| 207 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld; |
Trond Myklebust | 5793427 | 2012-09-20 20:37:23 -0400 | [diff] [blame] | 208 | return ld->alloc_layout_hdr(ino, gfp_flags); |
Benny Halevy | 636fb9c | 2011-05-22 19:51:33 +0300 | [diff] [blame] | 209 | } |
| 210 | |
| 211 | static void |
| 212 | pnfs_free_layout_hdr(struct pnfs_layout_hdr *lo) |
| 213 | { |
Trond Myklebust | 9c62638 | 2012-09-20 17:31:43 -0400 | [diff] [blame] | 214 | struct nfs_server *server = NFS_SERVER(lo->plh_inode); |
| 215 | struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; |
| 216 | |
| 217 | if (!list_empty(&lo->plh_layouts)) { |
| 218 | struct nfs_client *clp = server->nfs_client; |
| 219 | |
| 220 | spin_lock(&clp->cl_lock); |
| 221 | list_del_init(&lo->plh_layouts); |
| 222 | spin_unlock(&clp->cl_lock); |
| 223 | } |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 224 | put_rpccred(lo->plh_lc_cred); |
Trond Myklebust | 5793427 | 2012-09-20 20:37:23 -0400 | [diff] [blame] | 225 | return ld->free_layout_hdr(lo); |
Benny Halevy | 636fb9c | 2011-05-22 19:51:33 +0300 | [diff] [blame] | 226 | } |
| 227 | |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 228 | static void |
Trond Myklebust | 6622c3e | 2012-09-20 17:23:11 -0400 | [diff] [blame] | 229 | pnfs_detach_layout_hdr(struct pnfs_layout_hdr *lo) |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 230 | { |
Trond Myklebust | bb346f6 | 2012-09-20 15:52:13 -0400 | [diff] [blame] | 231 | struct nfs_inode *nfsi = NFS_I(lo->plh_inode); |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 232 | dprintk("%s: freeing layout cache %p\n", __func__, lo); |
Trond Myklebust | bb346f6 | 2012-09-20 15:52:13 -0400 | [diff] [blame] | 233 | nfsi->layout = NULL; |
| 234 | /* Reset MDS Threshold I/O counters */ |
| 235 | nfsi->write_io = 0; |
| 236 | nfsi->read_io = 0; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 237 | } |
| 238 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 239 | void |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 240 | pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 241 | { |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 242 | struct inode *inode = lo->plh_inode; |
| 243 | |
| 244 | if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) { |
Peng Tao | 566f873 | 2014-10-10 23:25:46 +0800 | [diff] [blame] | 245 | if (!list_empty(&lo->plh_segs)) |
| 246 | WARN_ONCE(1, "NFS: BUG unfreed layout segments.\n"); |
Trond Myklebust | 6622c3e | 2012-09-20 17:23:11 -0400 | [diff] [blame] | 247 | pnfs_detach_layout_hdr(lo); |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 248 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 6622c3e | 2012-09-20 17:23:11 -0400 | [diff] [blame] | 249 | pnfs_free_layout_hdr(lo); |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 250 | } |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 251 | } |
| 252 | |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 253 | static int |
| 254 | pnfs_iomode_to_fail_bit(u32 iomode) |
| 255 | { |
| 256 | return iomode == IOMODE_RW ? |
| 257 | NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; |
| 258 | } |
| 259 | |
| 260 | static void |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 261 | pnfs_layout_set_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 262 | { |
Trond Myklebust | 25c7533 | 2012-09-18 17:01:12 -0400 | [diff] [blame] | 263 | lo->plh_retry_timestamp = jiffies; |
Yanchuan Nian | 39e88fc | 2013-01-04 20:19:49 +0800 | [diff] [blame] | 264 | if (!test_and_set_bit(fail_bit, &lo->plh_flags)) |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 265 | atomic_inc(&lo->plh_refcount); |
| 266 | } |
| 267 | |
| 268 | static void |
| 269 | pnfs_layout_clear_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) |
| 270 | { |
| 271 | if (test_and_clear_bit(fail_bit, &lo->plh_flags)) |
| 272 | atomic_dec(&lo->plh_refcount); |
| 273 | } |
| 274 | |
| 275 | static void |
| 276 | pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode) |
| 277 | { |
| 278 | struct inode *inode = lo->plh_inode; |
Trond Myklebust | 115ce57 | 2012-09-20 21:19:43 -0400 | [diff] [blame] | 279 | struct pnfs_layout_range range = { |
| 280 | .iomode = iomode, |
| 281 | .offset = 0, |
| 282 | .length = NFS4_MAX_UINT64, |
| 283 | }; |
| 284 | LIST_HEAD(head); |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 285 | |
| 286 | spin_lock(&inode->i_lock); |
| 287 | pnfs_layout_set_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); |
Trond Myklebust | 115ce57 | 2012-09-20 21:19:43 -0400 | [diff] [blame] | 288 | pnfs_mark_matching_lsegs_invalid(lo, &head, &range); |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 289 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 115ce57 | 2012-09-20 21:19:43 -0400 | [diff] [blame] | 290 | pnfs_free_lseg_list(&head); |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 291 | dprintk("%s Setting layout IOMODE_%s fail bit\n", __func__, |
| 292 | iomode == IOMODE_RW ? "RW" : "READ"); |
| 293 | } |
| 294 | |
| 295 | static bool |
| 296 | pnfs_layout_io_test_failed(struct pnfs_layout_hdr *lo, u32 iomode) |
| 297 | { |
Trond Myklebust | 25c7533 | 2012-09-18 17:01:12 -0400 | [diff] [blame] | 298 | unsigned long start, end; |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 299 | int fail_bit = pnfs_iomode_to_fail_bit(iomode); |
| 300 | |
| 301 | if (test_bit(fail_bit, &lo->plh_flags) == 0) |
Trond Myklebust | 25c7533 | 2012-09-18 17:01:12 -0400 | [diff] [blame] | 302 | return false; |
| 303 | end = jiffies; |
| 304 | start = end - PNFS_LAYOUTGET_RETRY_TIMEOUT; |
| 305 | if (!time_in_range(lo->plh_retry_timestamp, start, end)) { |
| 306 | /* It is time to retry the failed layoutgets */ |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 307 | pnfs_layout_clear_fail_bit(lo, fail_bit); |
Trond Myklebust | 25c7533 | 2012-09-18 17:01:12 -0400 | [diff] [blame] | 308 | return false; |
| 309 | } |
| 310 | return true; |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 311 | } |
| 312 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 313 | static void |
| 314 | init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg) |
| 315 | { |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 316 | INIT_LIST_HEAD(&lseg->pls_list); |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 317 | INIT_LIST_HEAD(&lseg->pls_lc_list); |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 318 | atomic_set(&lseg->pls_refcount, 1); |
| 319 | smp_mb(); |
| 320 | set_bit(NFS_LSEG_VALID, &lseg->pls_flags); |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 321 | lseg->pls_layout = lo; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 322 | } |
| 323 | |
Trond Myklebust | 905ca19 | 2012-09-20 20:46:49 -0400 | [diff] [blame] | 324 | static void pnfs_free_lseg(struct pnfs_layout_segment *lseg) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 325 | { |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 326 | struct inode *ino = lseg->pls_layout->plh_inode; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 327 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 328 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 329 | } |
| 330 | |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 331 | static void |
Trond Myklebust | 57036a3 | 2012-09-20 16:33:30 -0400 | [diff] [blame] | 332 | pnfs_layout_remove_lseg(struct pnfs_layout_hdr *lo, |
| 333 | struct pnfs_layout_segment *lseg) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 334 | { |
Trond Myklebust | 57036a3 | 2012-09-20 16:33:30 -0400 | [diff] [blame] | 335 | struct inode *inode = lo->plh_inode; |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 336 | |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 337 | WARN_ON(test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 338 | list_del_init(&lseg->pls_list); |
Trond Myklebust | 8f0d27d | 2012-09-20 20:57:11 -0400 | [diff] [blame] | 339 | /* Matched by pnfs_get_layout_hdr in pnfs_layout_insert_lseg */ |
| 340 | atomic_dec(&lo->plh_refcount); |
Trond Myklebust | 173f77e | 2012-09-21 15:49:42 -0400 | [diff] [blame] | 341 | if (list_empty(&lo->plh_segs)) |
| 342 | clear_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 343 | rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq); |
| 344 | } |
| 345 | |
Peng Tao | aa1e0e3a | 2014-09-06 00:53:25 +0800 | [diff] [blame] | 346 | /* Return true if layoutreturn is needed */ |
| 347 | static bool |
| 348 | pnfs_layout_need_return(struct pnfs_layout_hdr *lo, |
| 349 | struct pnfs_layout_segment *lseg, |
| 350 | nfs4_stateid *stateid, enum pnfs_iomode *iomode) |
| 351 | { |
| 352 | struct pnfs_layout_segment *s; |
| 353 | |
| 354 | if (!test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)) |
| 355 | return false; |
| 356 | |
| 357 | list_for_each_entry(s, &lo->plh_segs, pls_list) |
| 358 | if (test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)) |
| 359 | return false; |
| 360 | |
| 361 | *stateid = lo->plh_stateid; |
| 362 | *iomode = lo->plh_return_iomode; |
| 363 | /* decreased in pnfs_send_layoutreturn() */ |
| 364 | lo->plh_block_lgets++; |
| 365 | lo->plh_return_iomode = 0; |
| 366 | return true; |
| 367 | } |
| 368 | |
Fred Isaman | bae724e | 2011-03-01 01:34:15 +0000 | [diff] [blame] | 369 | void |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 370 | pnfs_put_lseg(struct pnfs_layout_segment *lseg) |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 371 | { |
Trond Myklebust | 57036a3 | 2012-09-20 16:33:30 -0400 | [diff] [blame] | 372 | struct pnfs_layout_hdr *lo; |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 373 | struct inode *inode; |
| 374 | |
| 375 | if (!lseg) |
| 376 | return; |
| 377 | |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 378 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, |
| 379 | atomic_read(&lseg->pls_refcount), |
| 380 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
Trond Myklebust | 57036a3 | 2012-09-20 16:33:30 -0400 | [diff] [blame] | 381 | lo = lseg->pls_layout; |
| 382 | inode = lo->plh_inode; |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 383 | if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) { |
Peng Tao | aa1e0e3a | 2014-09-06 00:53:25 +0800 | [diff] [blame] | 384 | bool need_return; |
| 385 | nfs4_stateid stateid; |
| 386 | enum pnfs_iomode iomode; |
| 387 | |
Trond Myklebust | 8f0d27d | 2012-09-20 20:57:11 -0400 | [diff] [blame] | 388 | pnfs_get_layout_hdr(lo); |
Trond Myklebust | 57036a3 | 2012-09-20 16:33:30 -0400 | [diff] [blame] | 389 | pnfs_layout_remove_lseg(lo, lseg); |
Peng Tao | aa1e0e3a | 2014-09-06 00:53:25 +0800 | [diff] [blame] | 390 | need_return = pnfs_layout_need_return(lo, lseg, |
| 391 | &stateid, &iomode); |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 392 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 905ca19 | 2012-09-20 20:46:49 -0400 | [diff] [blame] | 393 | pnfs_free_lseg(lseg); |
Peng Tao | aa1e0e3a | 2014-09-06 00:53:25 +0800 | [diff] [blame] | 394 | if (need_return) |
Peng Tao | 6c16605 | 2014-11-17 09:30:40 +0800 | [diff] [blame^] | 395 | pnfs_send_layoutreturn(lo, stateid, iomode, |
| 396 | true); |
Peng Tao | aa1e0e3a | 2014-09-06 00:53:25 +0800 | [diff] [blame] | 397 | else |
| 398 | pnfs_put_layout_hdr(lo); |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 399 | } |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 400 | } |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 401 | EXPORT_SYMBOL_GPL(pnfs_put_lseg); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 402 | |
Trond Myklebust | 6543f80 | 2014-10-08 16:39:12 -0400 | [diff] [blame] | 403 | static void pnfs_free_lseg_async_work(struct work_struct *work) |
Weston Andros Adamson | e6cf82d | 2014-07-17 20:42:18 -0400 | [diff] [blame] | 404 | { |
| 405 | struct pnfs_layout_segment *lseg; |
Trond Myklebust | 6543f80 | 2014-10-08 16:39:12 -0400 | [diff] [blame] | 406 | struct pnfs_layout_hdr *lo; |
Weston Andros Adamson | e6cf82d | 2014-07-17 20:42:18 -0400 | [diff] [blame] | 407 | |
| 408 | lseg = container_of(work, struct pnfs_layout_segment, pls_work); |
Trond Myklebust | 6543f80 | 2014-10-08 16:39:12 -0400 | [diff] [blame] | 409 | lo = lseg->pls_layout; |
Weston Andros Adamson | e6cf82d | 2014-07-17 20:42:18 -0400 | [diff] [blame] | 410 | |
Trond Myklebust | 6543f80 | 2014-10-08 16:39:12 -0400 | [diff] [blame] | 411 | pnfs_free_lseg(lseg); |
| 412 | pnfs_put_layout_hdr(lo); |
| 413 | } |
| 414 | |
| 415 | static void pnfs_free_lseg_async(struct pnfs_layout_segment *lseg) |
| 416 | { |
| 417 | INIT_WORK(&lseg->pls_work, pnfs_free_lseg_async_work); |
| 418 | schedule_work(&lseg->pls_work); |
Weston Andros Adamson | e6cf82d | 2014-07-17 20:42:18 -0400 | [diff] [blame] | 419 | } |
| 420 | |
| 421 | void |
Trond Myklebust | 6543f80 | 2014-10-08 16:39:12 -0400 | [diff] [blame] | 422 | pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg) |
Weston Andros Adamson | e6cf82d | 2014-07-17 20:42:18 -0400 | [diff] [blame] | 423 | { |
Trond Myklebust | 6543f80 | 2014-10-08 16:39:12 -0400 | [diff] [blame] | 424 | if (!lseg) |
| 425 | return; |
| 426 | |
| 427 | assert_spin_locked(&lseg->pls_layout->plh_inode->i_lock); |
| 428 | |
| 429 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, |
| 430 | atomic_read(&lseg->pls_refcount), |
| 431 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
| 432 | if (atomic_dec_and_test(&lseg->pls_refcount)) { |
| 433 | struct pnfs_layout_hdr *lo = lseg->pls_layout; |
| 434 | pnfs_get_layout_hdr(lo); |
| 435 | pnfs_layout_remove_lseg(lo, lseg); |
| 436 | pnfs_free_lseg_async(lseg); |
| 437 | } |
Weston Andros Adamson | e6cf82d | 2014-07-17 20:42:18 -0400 | [diff] [blame] | 438 | } |
Trond Myklebust | 6543f80 | 2014-10-08 16:39:12 -0400 | [diff] [blame] | 439 | EXPORT_SYMBOL_GPL(pnfs_put_lseg_locked); |
Weston Andros Adamson | e6cf82d | 2014-07-17 20:42:18 -0400 | [diff] [blame] | 440 | |
Trond Myklebust | 3cb2df1 | 2013-06-03 11:24:36 -0400 | [diff] [blame] | 441 | static u64 |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 442 | end_offset(u64 start, u64 len) |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 443 | { |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 444 | u64 end; |
| 445 | |
| 446 | end = start + len; |
| 447 | return end >= start ? end : NFS4_MAX_UINT64; |
| 448 | } |
| 449 | |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 450 | /* |
| 451 | * is l2 fully contained in l1? |
| 452 | * start1 end1 |
| 453 | * [----------------------------------) |
| 454 | * start2 end2 |
| 455 | * [----------------) |
| 456 | */ |
Trond Myklebust | 3cb2df1 | 2013-06-03 11:24:36 -0400 | [diff] [blame] | 457 | static bool |
Trond Myklebust | 7dc0ac7 | 2013-06-03 11:30:24 -0400 | [diff] [blame] | 458 | pnfs_lseg_range_contained(const struct pnfs_layout_range *l1, |
Trond Myklebust | 3cb2df1 | 2013-06-03 11:24:36 -0400 | [diff] [blame] | 459 | const struct pnfs_layout_range *l2) |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 460 | { |
| 461 | u64 start1 = l1->offset; |
| 462 | u64 end1 = end_offset(start1, l1->length); |
| 463 | u64 start2 = l2->offset; |
| 464 | u64 end2 = end_offset(start2, l2->length); |
| 465 | |
| 466 | return (start1 <= start2) && (end1 >= end2); |
| 467 | } |
| 468 | |
| 469 | /* |
| 470 | * is l1 and l2 intersecting? |
| 471 | * start1 end1 |
| 472 | * [----------------------------------) |
| 473 | * start2 end2 |
| 474 | * [----------------) |
| 475 | */ |
Trond Myklebust | 3cb2df1 | 2013-06-03 11:24:36 -0400 | [diff] [blame] | 476 | static bool |
Trond Myklebust | 7dc0ac7 | 2013-06-03 11:30:24 -0400 | [diff] [blame] | 477 | pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, |
Trond Myklebust | 3cb2df1 | 2013-06-03 11:24:36 -0400 | [diff] [blame] | 478 | const struct pnfs_layout_range *l2) |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 479 | { |
| 480 | u64 start1 = l1->offset; |
| 481 | u64 end1 = end_offset(start1, l1->length); |
| 482 | u64 start2 = l2->offset; |
| 483 | u64 end2 = end_offset(start2, l2->length); |
| 484 | |
| 485 | return (end1 == NFS4_MAX_UINT64 || end1 > start2) && |
| 486 | (end2 == NFS4_MAX_UINT64 || end2 > start1); |
| 487 | } |
| 488 | |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 489 | static bool |
Trond Myklebust | 3cb2df1 | 2013-06-03 11:24:36 -0400 | [diff] [blame] | 490 | should_free_lseg(const struct pnfs_layout_range *lseg_range, |
| 491 | const struct pnfs_layout_range *recall_range) |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 492 | { |
Benny Halevy | 778b550 | 2011-05-22 19:48:02 +0300 | [diff] [blame] | 493 | return (recall_range->iomode == IOMODE_ANY || |
| 494 | lseg_range->iomode == recall_range->iomode) && |
Trond Myklebust | 7dc0ac7 | 2013-06-03 11:30:24 -0400 | [diff] [blame] | 495 | pnfs_lseg_range_intersecting(lseg_range, recall_range); |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 496 | } |
| 497 | |
Trond Myklebust | 2495680 | 2013-03-20 13:03:00 -0400 | [diff] [blame] | 498 | static bool pnfs_lseg_dec_and_remove_zero(struct pnfs_layout_segment *lseg, |
| 499 | struct list_head *tmp_list) |
| 500 | { |
| 501 | if (!atomic_dec_and_test(&lseg->pls_refcount)) |
| 502 | return false; |
| 503 | pnfs_layout_remove_lseg(lseg->pls_layout, lseg); |
| 504 | list_add(&lseg->pls_list, tmp_list); |
| 505 | return true; |
| 506 | } |
| 507 | |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 508 | /* Returns 1 if lseg is removed from list, 0 otherwise */ |
| 509 | static int mark_lseg_invalid(struct pnfs_layout_segment *lseg, |
| 510 | struct list_head *tmp_list) |
| 511 | { |
| 512 | int rv = 0; |
| 513 | |
| 514 | if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { |
| 515 | /* Remove the reference keeping the lseg in the |
| 516 | * list. It will now be removed when all |
| 517 | * outstanding io is finished. |
| 518 | */ |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 519 | dprintk("%s: lseg %p ref %d\n", __func__, lseg, |
| 520 | atomic_read(&lseg->pls_refcount)); |
Trond Myklebust | 2495680 | 2013-03-20 13:03:00 -0400 | [diff] [blame] | 521 | if (pnfs_lseg_dec_and_remove_zero(lseg, tmp_list)) |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 522 | rv = 1; |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 523 | } |
| 524 | return rv; |
| 525 | } |
| 526 | |
| 527 | /* Returns count of number of matching invalid lsegs remaining in list |
| 528 | * after call. |
| 529 | */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 530 | int |
Trond Myklebust | 49a8506 | 2012-09-18 20:43:31 -0400 | [diff] [blame] | 531 | pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 532 | struct list_head *tmp_list, |
Benny Halevy | 778b550 | 2011-05-22 19:48:02 +0300 | [diff] [blame] | 533 | struct pnfs_layout_range *recall_range) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 534 | { |
| 535 | struct pnfs_layout_segment *lseg, *next; |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 536 | int invalid = 0, removed = 0; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 537 | |
| 538 | dprintk("%s:Begin lo %p\n", __func__, lo); |
| 539 | |
Trond Myklebust | 8006bfb | 2012-09-21 14:48:04 -0400 | [diff] [blame] | 540 | if (list_empty(&lo->plh_segs)) |
Fred Isaman | 3851172 | 2011-02-03 18:28:50 +0000 | [diff] [blame] | 541 | return 0; |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 542 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
Benny Halevy | 778b550 | 2011-05-22 19:48:02 +0300 | [diff] [blame] | 543 | if (!recall_range || |
| 544 | should_free_lseg(&lseg->pls_range, recall_range)) { |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 545 | dprintk("%s: freeing lseg %p iomode %d " |
| 546 | "offset %llu length %llu\n", __func__, |
| 547 | lseg, lseg->pls_range.iomode, lseg->pls_range.offset, |
| 548 | lseg->pls_range.length); |
| 549 | invalid++; |
| 550 | removed += mark_lseg_invalid(lseg, tmp_list); |
| 551 | } |
| 552 | dprintk("%s:Return %i\n", __func__, invalid - removed); |
| 553 | return invalid - removed; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 554 | } |
| 555 | |
Fred Isaman | f49f9ba | 2011-02-03 18:28:52 +0000 | [diff] [blame] | 556 | /* note free_me must contain lsegs from a single layout_hdr */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 557 | void |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 558 | pnfs_free_lseg_list(struct list_head *free_me) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 559 | { |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 560 | struct pnfs_layout_segment *lseg, *tmp; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 561 | |
Fred Isaman | f49f9ba | 2011-02-03 18:28:52 +0000 | [diff] [blame] | 562 | if (list_empty(free_me)) |
| 563 | return; |
| 564 | |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 565 | list_for_each_entry_safe(lseg, tmp, free_me, pls_list) { |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 566 | list_del(&lseg->pls_list); |
Trond Myklebust | 905ca19 | 2012-09-20 20:46:49 -0400 | [diff] [blame] | 567 | pnfs_free_lseg(lseg); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 568 | } |
| 569 | } |
| 570 | |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 571 | void |
| 572 | pnfs_destroy_layout(struct nfs_inode *nfsi) |
| 573 | { |
| 574 | struct pnfs_layout_hdr *lo; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 575 | LIST_HEAD(tmp_list); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 576 | |
| 577 | spin_lock(&nfsi->vfs_inode.i_lock); |
| 578 | lo = nfsi->layout; |
| 579 | if (lo) { |
Fred Isaman | 3851172 | 2011-02-03 18:28:50 +0000 | [diff] [blame] | 580 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ |
Trond Myklebust | 49a8506 | 2012-09-18 20:43:31 -0400 | [diff] [blame] | 581 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 582 | pnfs_get_layout_hdr(lo); |
| 583 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED); |
| 584 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED); |
| 585 | spin_unlock(&nfsi->vfs_inode.i_lock); |
| 586 | pnfs_free_lseg_list(&tmp_list); |
| 587 | pnfs_put_layout_hdr(lo); |
| 588 | } else |
| 589 | spin_unlock(&nfsi->vfs_inode.i_lock); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 590 | } |
Andy Adamson | 041245c | 2012-04-27 17:53:53 -0400 | [diff] [blame] | 591 | EXPORT_SYMBOL_GPL(pnfs_destroy_layout); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 592 | |
Trond Myklebust | fd9a8d7 | 2013-02-12 09:48:42 -0500 | [diff] [blame] | 593 | static bool |
| 594 | pnfs_layout_add_bulk_destroy_list(struct inode *inode, |
| 595 | struct list_head *layout_list) |
| 596 | { |
| 597 | struct pnfs_layout_hdr *lo; |
| 598 | bool ret = false; |
| 599 | |
| 600 | spin_lock(&inode->i_lock); |
| 601 | lo = NFS_I(inode)->layout; |
| 602 | if (lo != NULL && list_empty(&lo->plh_bulk_destroy)) { |
| 603 | pnfs_get_layout_hdr(lo); |
| 604 | list_add(&lo->plh_bulk_destroy, layout_list); |
| 605 | ret = true; |
| 606 | } |
| 607 | spin_unlock(&inode->i_lock); |
| 608 | return ret; |
| 609 | } |
| 610 | |
| 611 | /* Caller must hold rcu_read_lock and clp->cl_lock */ |
| 612 | static int |
| 613 | pnfs_layout_bulk_destroy_byserver_locked(struct nfs_client *clp, |
| 614 | struct nfs_server *server, |
| 615 | struct list_head *layout_list) |
| 616 | { |
| 617 | struct pnfs_layout_hdr *lo, *next; |
| 618 | struct inode *inode; |
| 619 | |
| 620 | list_for_each_entry_safe(lo, next, &server->layouts, plh_layouts) { |
| 621 | inode = igrab(lo->plh_inode); |
| 622 | if (inode == NULL) |
| 623 | continue; |
| 624 | list_del_init(&lo->plh_layouts); |
| 625 | if (pnfs_layout_add_bulk_destroy_list(inode, layout_list)) |
| 626 | continue; |
| 627 | rcu_read_unlock(); |
| 628 | spin_unlock(&clp->cl_lock); |
| 629 | iput(inode); |
| 630 | spin_lock(&clp->cl_lock); |
| 631 | rcu_read_lock(); |
| 632 | return -EAGAIN; |
| 633 | } |
| 634 | return 0; |
| 635 | } |
| 636 | |
| 637 | static int |
| 638 | pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list, |
| 639 | bool is_bulk_recall) |
| 640 | { |
| 641 | struct pnfs_layout_hdr *lo; |
| 642 | struct inode *inode; |
| 643 | struct pnfs_layout_range range = { |
| 644 | .iomode = IOMODE_ANY, |
| 645 | .offset = 0, |
| 646 | .length = NFS4_MAX_UINT64, |
| 647 | }; |
| 648 | LIST_HEAD(lseg_list); |
| 649 | int ret = 0; |
| 650 | |
| 651 | while (!list_empty(layout_list)) { |
| 652 | lo = list_entry(layout_list->next, struct pnfs_layout_hdr, |
| 653 | plh_bulk_destroy); |
| 654 | dprintk("%s freeing layout for inode %lu\n", __func__, |
| 655 | lo->plh_inode->i_ino); |
| 656 | inode = lo->plh_inode; |
Christoph Hellwig | 7c5d187 | 2014-09-10 08:23:29 -0700 | [diff] [blame] | 657 | |
| 658 | pnfs_layoutcommit_inode(inode, false); |
| 659 | |
Trond Myklebust | fd9a8d7 | 2013-02-12 09:48:42 -0500 | [diff] [blame] | 660 | spin_lock(&inode->i_lock); |
| 661 | list_del_init(&lo->plh_bulk_destroy); |
| 662 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ |
| 663 | if (is_bulk_recall) |
| 664 | set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); |
| 665 | if (pnfs_mark_matching_lsegs_invalid(lo, &lseg_list, &range)) |
| 666 | ret = -EAGAIN; |
| 667 | spin_unlock(&inode->i_lock); |
| 668 | pnfs_free_lseg_list(&lseg_list); |
| 669 | pnfs_put_layout_hdr(lo); |
| 670 | iput(inode); |
| 671 | } |
| 672 | return ret; |
| 673 | } |
| 674 | |
| 675 | int |
| 676 | pnfs_destroy_layouts_byfsid(struct nfs_client *clp, |
| 677 | struct nfs_fsid *fsid, |
| 678 | bool is_recall) |
| 679 | { |
| 680 | struct nfs_server *server; |
| 681 | LIST_HEAD(layout_list); |
| 682 | |
| 683 | spin_lock(&clp->cl_lock); |
| 684 | rcu_read_lock(); |
| 685 | restart: |
| 686 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 687 | if (memcmp(&server->fsid, fsid, sizeof(*fsid)) != 0) |
| 688 | continue; |
| 689 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, |
| 690 | server, |
| 691 | &layout_list) != 0) |
| 692 | goto restart; |
| 693 | } |
| 694 | rcu_read_unlock(); |
| 695 | spin_unlock(&clp->cl_lock); |
| 696 | |
| 697 | if (list_empty(&layout_list)) |
| 698 | return 0; |
| 699 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); |
| 700 | } |
| 701 | |
| 702 | int |
| 703 | pnfs_destroy_layouts_byclid(struct nfs_client *clp, |
| 704 | bool is_recall) |
| 705 | { |
| 706 | struct nfs_server *server; |
| 707 | LIST_HEAD(layout_list); |
| 708 | |
| 709 | spin_lock(&clp->cl_lock); |
| 710 | rcu_read_lock(); |
| 711 | restart: |
| 712 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 713 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, |
| 714 | server, |
| 715 | &layout_list) != 0) |
| 716 | goto restart; |
| 717 | } |
| 718 | rcu_read_unlock(); |
| 719 | spin_unlock(&clp->cl_lock); |
| 720 | |
| 721 | if (list_empty(&layout_list)) |
| 722 | return 0; |
| 723 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); |
| 724 | } |
| 725 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 726 | /* |
| 727 | * Called by the state manger to remove all layouts established under an |
| 728 | * expired lease. |
| 729 | */ |
| 730 | void |
| 731 | pnfs_destroy_all_layouts(struct nfs_client *clp) |
| 732 | { |
Andy Adamson | c47abcf | 2011-06-15 17:52:40 -0400 | [diff] [blame] | 733 | nfs4_deviceid_mark_client_invalid(clp); |
| 734 | nfs4_deviceid_purge_client(clp); |
| 735 | |
Trond Myklebust | fd9a8d7 | 2013-02-12 09:48:42 -0500 | [diff] [blame] | 736 | pnfs_destroy_layouts_byclid(clp, false); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 737 | } |
| 738 | |
Trond Myklebust | 5a65503 | 2012-10-02 16:47:14 -0700 | [diff] [blame] | 739 | /* |
| 740 | * Compare 2 layout stateid sequence ids, to see which is newer, |
| 741 | * taking into account wraparound issues. |
| 742 | */ |
| 743 | static bool pnfs_seqid_is_newer(u32 s1, u32 s2) |
| 744 | { |
Trond Myklebust | 2c64c57 | 2014-02-12 09:36:59 -0500 | [diff] [blame] | 745 | return (s32)(s1 - s2) > 0; |
Trond Myklebust | 5a65503 | 2012-10-02 16:47:14 -0700 | [diff] [blame] | 746 | } |
| 747 | |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 748 | /* update lo->plh_stateid with new if is more recent */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 749 | void |
| 750 | pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new, |
| 751 | bool update_barrier) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 752 | { |
Trond Myklebust | 22aaf71 | 2012-10-04 16:32:22 -0700 | [diff] [blame] | 753 | u32 oldseq, newseq, new_barrier; |
| 754 | int empty = list_empty(&lo->plh_segs); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 755 | |
Trond Myklebust | 2d2f24a | 2012-03-04 18:13:57 -0500 | [diff] [blame] | 756 | oldseq = be32_to_cpu(lo->plh_stateid.seqid); |
| 757 | newseq = be32_to_cpu(new->seqid); |
Trond Myklebust | 22aaf71 | 2012-10-04 16:32:22 -0700 | [diff] [blame] | 758 | if (empty || pnfs_seqid_is_newer(newseq, oldseq)) { |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 759 | nfs4_stateid_copy(&lo->plh_stateid, new); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 760 | if (update_barrier) { |
Trond Myklebust | 22aaf71 | 2012-10-04 16:32:22 -0700 | [diff] [blame] | 761 | new_barrier = be32_to_cpu(new->seqid); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 762 | } else { |
| 763 | /* Because of wraparound, we want to keep the barrier |
Trond Myklebust | 22aaf71 | 2012-10-04 16:32:22 -0700 | [diff] [blame] | 764 | * "close" to the current seqids. |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 765 | */ |
Trond Myklebust | 22aaf71 | 2012-10-04 16:32:22 -0700 | [diff] [blame] | 766 | new_barrier = newseq - atomic_read(&lo->plh_outstanding); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 767 | } |
Trond Myklebust | 22aaf71 | 2012-10-04 16:32:22 -0700 | [diff] [blame] | 768 | if (empty || pnfs_seqid_is_newer(new_barrier, lo->plh_barrier)) |
| 769 | lo->plh_barrier = new_barrier; |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 770 | } |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 771 | } |
| 772 | |
Trond Myklebust | 19c54ab | 2012-10-05 16:56:58 -0700 | [diff] [blame] | 773 | static bool |
| 774 | pnfs_layout_stateid_blocked(const struct pnfs_layout_hdr *lo, |
| 775 | const nfs4_stateid *stateid) |
| 776 | { |
| 777 | u32 seqid = be32_to_cpu(stateid->seqid); |
| 778 | |
| 779 | return !pnfs_seqid_is_newer(seqid, lo->plh_barrier); |
| 780 | } |
| 781 | |
Peng Tao | ce6ab4f | 2014-09-06 00:53:24 +0800 | [diff] [blame] | 782 | static bool |
| 783 | pnfs_layout_returning(const struct pnfs_layout_hdr *lo, |
| 784 | struct pnfs_layout_range *range) |
| 785 | { |
| 786 | return test_bit(NFS_LAYOUT_RETURN, &lo->plh_flags) && |
| 787 | (lo->plh_return_iomode == IOMODE_ANY || |
| 788 | lo->plh_return_iomode == range->iomode); |
| 789 | } |
| 790 | |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 791 | /* lget is set to 1 if called from inside send_layoutget call chain */ |
| 792 | static bool |
Peng Tao | ce6ab4f | 2014-09-06 00:53:24 +0800 | [diff] [blame] | 793 | pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo, |
| 794 | struct pnfs_layout_range *range, int lget) |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 795 | { |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 796 | return lo->plh_block_lgets || |
| 797 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 798 | (list_empty(&lo->plh_segs) && |
Peng Tao | ce6ab4f | 2014-09-06 00:53:24 +0800 | [diff] [blame] | 799 | (atomic_read(&lo->plh_outstanding) > lget)) || |
| 800 | pnfs_layout_returning(lo, range); |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 801 | } |
| 802 | |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 803 | int |
| 804 | pnfs_choose_layoutget_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo, |
Peng Tao | ce6ab4f | 2014-09-06 00:53:24 +0800 | [diff] [blame] | 805 | struct pnfs_layout_range *range, |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 806 | struct nfs4_state *open_state) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 807 | { |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 808 | int status = 0; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 809 | |
| 810 | dprintk("--> %s\n", __func__); |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 811 | spin_lock(&lo->plh_inode->i_lock); |
Peng Tao | ce6ab4f | 2014-09-06 00:53:24 +0800 | [diff] [blame] | 812 | if (pnfs_layoutgets_blocked(lo, range, 1)) { |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 813 | status = -EAGAIN; |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 814 | } else if (!nfs4_valid_open_stateid(open_state)) { |
| 815 | status = -EBADF; |
Christoph Hellwig | 47abade | 2014-08-21 11:09:22 -0500 | [diff] [blame] | 816 | } else if (list_empty(&lo->plh_segs) || |
| 817 | test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags)) { |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 818 | int seq; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 819 | |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 820 | do { |
| 821 | seq = read_seqbegin(&open_state->seqlock); |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 822 | nfs4_stateid_copy(dst, &open_state->stateid); |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 823 | } while (read_seqretry(&open_state->seqlock, seq)); |
| 824 | } else |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 825 | nfs4_stateid_copy(dst, &lo->plh_stateid); |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 826 | spin_unlock(&lo->plh_inode->i_lock); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 827 | dprintk("<-- %s\n", __func__); |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 828 | return status; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 829 | } |
| 830 | |
| 831 | /* |
| 832 | * Get layout from server. |
| 833 | * for now, assume that whole file layouts are requested. |
| 834 | * arg->offset: 0 |
| 835 | * arg->length: all ones |
| 836 | */ |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 837 | static struct pnfs_layout_segment * |
| 838 | send_layoutget(struct pnfs_layout_hdr *lo, |
| 839 | struct nfs_open_context *ctx, |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 840 | struct pnfs_layout_range *range, |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 841 | gfp_t gfp_flags) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 842 | { |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 843 | struct inode *ino = lo->plh_inode; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 844 | struct nfs_server *server = NFS_SERVER(ino); |
| 845 | struct nfs4_layoutget *lgp; |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 846 | struct pnfs_layout_segment *lseg; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 847 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 848 | dprintk("--> %s\n", __func__); |
| 849 | |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 850 | lgp = kzalloc(sizeof(*lgp), gfp_flags); |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 851 | if (lgp == NULL) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 852 | return NULL; |
Weston Andros Adamson | 35124a0 | 2011-03-24 16:48:21 -0400 | [diff] [blame] | 853 | |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 854 | lgp->args.minlength = PAGE_CACHE_SIZE; |
| 855 | if (lgp->args.minlength > range->length) |
| 856 | lgp->args.minlength = range->length; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 857 | lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE; |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 858 | lgp->args.range = *range; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 859 | lgp->args.type = server->pnfs_curr_ld->id; |
| 860 | lgp->args.inode = ino; |
| 861 | lgp->args.ctx = get_nfs_open_context(ctx); |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 862 | lgp->gfp_flags = gfp_flags; |
Trond Myklebust | 6ab5934 | 2013-05-20 10:49:34 -0400 | [diff] [blame] | 863 | lgp->cred = lo->plh_lc_cred; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 864 | |
| 865 | /* Synchronously retrieve layout information from server and |
| 866 | * store in lseg. |
| 867 | */ |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 868 | lseg = nfs4_proc_layoutget(lgp, gfp_flags); |
| 869 | if (IS_ERR(lseg)) { |
| 870 | switch (PTR_ERR(lseg)) { |
| 871 | case -ENOMEM: |
| 872 | case -ERESTARTSYS: |
| 873 | break; |
| 874 | default: |
| 875 | /* remember that LAYOUTGET failed and suspend trying */ |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 876 | pnfs_layout_io_set_failed(lo, range->iomode); |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 877 | } |
| 878 | return NULL; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 879 | } |
Weston Andros Adamson | 35124a0 | 2011-03-24 16:48:21 -0400 | [diff] [blame] | 880 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 881 | return lseg; |
| 882 | } |
| 883 | |
Trond Myklebust | 2495680 | 2013-03-20 13:03:00 -0400 | [diff] [blame] | 884 | static void pnfs_clear_layoutcommit(struct inode *inode, |
| 885 | struct list_head *head) |
| 886 | { |
| 887 | struct nfs_inode *nfsi = NFS_I(inode); |
| 888 | struct pnfs_layout_segment *lseg, *tmp; |
| 889 | |
| 890 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
| 891 | return; |
| 892 | list_for_each_entry_safe(lseg, tmp, &nfsi->layout->plh_segs, pls_list) { |
| 893 | if (!test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) |
| 894 | continue; |
| 895 | pnfs_lseg_dec_and_remove_zero(lseg, head); |
| 896 | } |
| 897 | } |
| 898 | |
Peng Tao | f40eb5d | 2014-09-06 00:53:22 +0800 | [diff] [blame] | 899 | static int |
| 900 | pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, nfs4_stateid stateid, |
Peng Tao | 6c16605 | 2014-11-17 09:30:40 +0800 | [diff] [blame^] | 901 | enum pnfs_iomode iomode, bool sync) |
Peng Tao | f40eb5d | 2014-09-06 00:53:22 +0800 | [diff] [blame] | 902 | { |
| 903 | struct inode *ino = lo->plh_inode; |
| 904 | struct nfs4_layoutreturn *lrp; |
| 905 | int status = 0; |
| 906 | |
| 907 | lrp = kzalloc(sizeof(*lrp), GFP_KERNEL); |
| 908 | if (unlikely(lrp == NULL)) { |
| 909 | status = -ENOMEM; |
| 910 | spin_lock(&ino->i_lock); |
| 911 | lo->plh_block_lgets--; |
| 912 | spin_unlock(&ino->i_lock); |
| 913 | pnfs_put_layout_hdr(lo); |
| 914 | goto out; |
| 915 | } |
| 916 | |
| 917 | lrp->args.stateid = stateid; |
| 918 | lrp->args.layout_type = NFS_SERVER(ino)->pnfs_curr_ld->id; |
| 919 | lrp->args.inode = ino; |
Peng Tao | 15eb67c | 2014-11-17 09:30:36 +0800 | [diff] [blame] | 920 | lrp->args.range.iomode = iomode; |
| 921 | lrp->args.range.offset = 0; |
| 922 | lrp->args.range.length = NFS4_MAX_UINT64; |
Peng Tao | f40eb5d | 2014-09-06 00:53:22 +0800 | [diff] [blame] | 923 | lrp->args.layout = lo; |
| 924 | lrp->clp = NFS_SERVER(ino)->nfs_client; |
| 925 | lrp->cred = lo->plh_lc_cred; |
| 926 | |
Peng Tao | 6c16605 | 2014-11-17 09:30:40 +0800 | [diff] [blame^] | 927 | status = nfs4_proc_layoutreturn(lrp, sync); |
Peng Tao | f40eb5d | 2014-09-06 00:53:22 +0800 | [diff] [blame] | 928 | out: |
Peng Tao | e736a5b | 2014-09-06 00:53:26 +0800 | [diff] [blame] | 929 | if (status) { |
| 930 | spin_lock(&ino->i_lock); |
| 931 | clear_bit(NFS_LAYOUT_RETURN, &lo->plh_flags); |
| 932 | spin_unlock(&ino->i_lock); |
| 933 | } |
Peng Tao | f40eb5d | 2014-09-06 00:53:22 +0800 | [diff] [blame] | 934 | dprintk("<-- %s status: %d\n", __func__, status); |
| 935 | return status; |
| 936 | } |
| 937 | |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 938 | /* |
| 939 | * Initiates a LAYOUTRETURN(FILE), and removes the pnfs_layout_hdr |
| 940 | * when the layout segment list is empty. |
| 941 | * |
| 942 | * Note that a pnfs_layout_hdr can exist with an empty layout segment |
| 943 | * list when LAYOUTGET has failed, or when LAYOUTGET succeeded, but the |
| 944 | * deviceid is marked invalid. |
| 945 | */ |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 946 | int |
| 947 | _pnfs_return_layout(struct inode *ino) |
| 948 | { |
| 949 | struct pnfs_layout_hdr *lo = NULL; |
| 950 | struct nfs_inode *nfsi = NFS_I(ino); |
| 951 | LIST_HEAD(tmp_list); |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 952 | nfs4_stateid stateid; |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 953 | int status = 0, empty; |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 954 | |
Andy Adamson | 366d505 | 2012-06-20 15:03:33 -0400 | [diff] [blame] | 955 | dprintk("NFS: %s for inode %lu\n", __func__, ino->i_ino); |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 956 | |
| 957 | spin_lock(&ino->i_lock); |
| 958 | lo = nfsi->layout; |
Trond Myklebust | e5929f3 | 2012-09-21 16:37:02 -0400 | [diff] [blame] | 959 | if (!lo) { |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 960 | spin_unlock(&ino->i_lock); |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 961 | dprintk("NFS: %s no layout to return\n", __func__); |
| 962 | goto out; |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 963 | } |
| 964 | stateid = nfsi->layout->plh_stateid; |
| 965 | /* Reference matched in nfs4_layoutreturn_release */ |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 966 | pnfs_get_layout_hdr(lo); |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 967 | empty = list_empty(&lo->plh_segs); |
Trond Myklebust | 2495680 | 2013-03-20 13:03:00 -0400 | [diff] [blame] | 968 | pnfs_clear_layoutcommit(ino, &tmp_list); |
Trond Myklebust | 49a8506 | 2012-09-18 20:43:31 -0400 | [diff] [blame] | 969 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
Christoph Hellwig | c88953d | 2014-09-10 08:23:31 -0700 | [diff] [blame] | 970 | |
| 971 | if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) { |
| 972 | struct pnfs_layout_range range = { |
| 973 | .iomode = IOMODE_ANY, |
| 974 | .offset = 0, |
| 975 | .length = NFS4_MAX_UINT64, |
| 976 | }; |
| 977 | NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo, &range); |
| 978 | } |
| 979 | |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 980 | /* Don't send a LAYOUTRETURN if list was initially empty */ |
| 981 | if (empty) { |
| 982 | spin_unlock(&ino->i_lock); |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 983 | pnfs_put_layout_hdr(lo); |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 984 | dprintk("NFS: %s no layout segments to return\n", __func__); |
| 985 | goto out; |
| 986 | } |
Christoph Hellwig | 47abade | 2014-08-21 11:09:22 -0500 | [diff] [blame] | 987 | |
| 988 | set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); |
Fred Isaman | ea0ded7 | 2011-06-15 12:31:02 -0400 | [diff] [blame] | 989 | lo->plh_block_lgets++; |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 990 | spin_unlock(&ino->i_lock); |
| 991 | pnfs_free_lseg_list(&tmp_list); |
| 992 | |
Peng Tao | 6c16605 | 2014-11-17 09:30:40 +0800 | [diff] [blame^] | 993 | status = pnfs_send_layoutreturn(lo, stateid, IOMODE_ANY, true); |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 994 | out: |
| 995 | dprintk("<-- %s status: %d\n", __func__, status); |
| 996 | return status; |
| 997 | } |
Andy Adamson | 0a57cda | 2012-04-27 17:53:50 -0400 | [diff] [blame] | 998 | EXPORT_SYMBOL_GPL(_pnfs_return_layout); |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 999 | |
Trond Myklebust | 2402867 | 2013-03-20 13:23:33 -0400 | [diff] [blame] | 1000 | int |
| 1001 | pnfs_commit_and_return_layout(struct inode *inode) |
| 1002 | { |
| 1003 | struct pnfs_layout_hdr *lo; |
| 1004 | int ret; |
| 1005 | |
| 1006 | spin_lock(&inode->i_lock); |
| 1007 | lo = NFS_I(inode)->layout; |
| 1008 | if (lo == NULL) { |
| 1009 | spin_unlock(&inode->i_lock); |
| 1010 | return 0; |
| 1011 | } |
| 1012 | pnfs_get_layout_hdr(lo); |
| 1013 | /* Block new layoutgets and read/write to ds */ |
| 1014 | lo->plh_block_lgets++; |
| 1015 | spin_unlock(&inode->i_lock); |
| 1016 | filemap_fdatawait(inode->i_mapping); |
| 1017 | ret = pnfs_layoutcommit_inode(inode, true); |
| 1018 | if (ret == 0) |
| 1019 | ret = _pnfs_return_layout(inode); |
| 1020 | spin_lock(&inode->i_lock); |
| 1021 | lo->plh_block_lgets--; |
| 1022 | spin_unlock(&inode->i_lock); |
| 1023 | pnfs_put_layout_hdr(lo); |
| 1024 | return ret; |
| 1025 | } |
| 1026 | |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 1027 | bool pnfs_roc(struct inode *ino) |
| 1028 | { |
| 1029 | struct pnfs_layout_hdr *lo; |
| 1030 | struct pnfs_layout_segment *lseg, *tmp; |
| 1031 | LIST_HEAD(tmp_list); |
| 1032 | bool found = false; |
| 1033 | |
| 1034 | spin_lock(&ino->i_lock); |
| 1035 | lo = NFS_I(ino)->layout; |
| 1036 | if (!lo || !test_and_clear_bit(NFS_LAYOUT_ROC, &lo->plh_flags) || |
| 1037 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) |
| 1038 | goto out_nolayout; |
| 1039 | list_for_each_entry_safe(lseg, tmp, &lo->plh_segs, pls_list) |
| 1040 | if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { |
| 1041 | mark_lseg_invalid(lseg, &tmp_list); |
| 1042 | found = true; |
| 1043 | } |
| 1044 | if (!found) |
| 1045 | goto out_nolayout; |
| 1046 | lo->plh_block_lgets++; |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 1047 | pnfs_get_layout_hdr(lo); /* matched in pnfs_roc_release */ |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 1048 | spin_unlock(&ino->i_lock); |
| 1049 | pnfs_free_lseg_list(&tmp_list); |
| 1050 | return true; |
| 1051 | |
| 1052 | out_nolayout: |
| 1053 | spin_unlock(&ino->i_lock); |
| 1054 | return false; |
| 1055 | } |
| 1056 | |
| 1057 | void pnfs_roc_release(struct inode *ino) |
| 1058 | { |
| 1059 | struct pnfs_layout_hdr *lo; |
| 1060 | |
| 1061 | spin_lock(&ino->i_lock); |
| 1062 | lo = NFS_I(ino)->layout; |
| 1063 | lo->plh_block_lgets--; |
Trond Myklebust | 6622c3e | 2012-09-20 17:23:11 -0400 | [diff] [blame] | 1064 | if (atomic_dec_and_test(&lo->plh_refcount)) { |
| 1065 | pnfs_detach_layout_hdr(lo); |
| 1066 | spin_unlock(&ino->i_lock); |
| 1067 | pnfs_free_layout_hdr(lo); |
| 1068 | } else |
| 1069 | spin_unlock(&ino->i_lock); |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 1070 | } |
| 1071 | |
| 1072 | void pnfs_roc_set_barrier(struct inode *ino, u32 barrier) |
| 1073 | { |
| 1074 | struct pnfs_layout_hdr *lo; |
| 1075 | |
| 1076 | spin_lock(&ino->i_lock); |
| 1077 | lo = NFS_I(ino)->layout; |
Trond Myklebust | 0f35ad6 | 2012-10-04 16:28:17 -0700 | [diff] [blame] | 1078 | if (pnfs_seqid_is_newer(barrier, lo->plh_barrier)) |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 1079 | lo->plh_barrier = barrier; |
| 1080 | spin_unlock(&ino->i_lock); |
| 1081 | } |
| 1082 | |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 1083 | bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task) |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 1084 | { |
| 1085 | struct nfs_inode *nfsi = NFS_I(ino); |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 1086 | struct pnfs_layout_hdr *lo; |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 1087 | struct pnfs_layout_segment *lseg; |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 1088 | u32 current_seqid; |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 1089 | bool found = false; |
| 1090 | |
| 1091 | spin_lock(&ino->i_lock); |
| 1092 | list_for_each_entry(lseg, &nfsi->layout->plh_segs, pls_list) |
| 1093 | if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 1094 | rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL); |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 1095 | found = true; |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 1096 | goto out; |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 1097 | } |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 1098 | lo = nfsi->layout; |
| 1099 | current_seqid = be32_to_cpu(lo->plh_stateid.seqid); |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 1100 | |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 1101 | /* Since close does not return a layout stateid for use as |
| 1102 | * a barrier, we choose the worst-case barrier. |
| 1103 | */ |
| 1104 | *barrier = current_seqid + atomic_read(&lo->plh_outstanding); |
| 1105 | out: |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 1106 | spin_unlock(&ino->i_lock); |
| 1107 | return found; |
| 1108 | } |
| 1109 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1110 | /* |
| 1111 | * Compare two layout segments for sorting into layout cache. |
| 1112 | * We want to preferentially return RW over RO layouts, so ensure those |
| 1113 | * are seen first. |
| 1114 | */ |
| 1115 | static s64 |
Trond Myklebust | 7dc0ac7 | 2013-06-03 11:30:24 -0400 | [diff] [blame] | 1116 | pnfs_lseg_range_cmp(const struct pnfs_layout_range *l1, |
Trond Myklebust | 3cb2df1 | 2013-06-03 11:24:36 -0400 | [diff] [blame] | 1117 | const struct pnfs_layout_range *l2) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1118 | { |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1119 | s64 d; |
| 1120 | |
| 1121 | /* high offset > low offset */ |
| 1122 | d = l1->offset - l2->offset; |
| 1123 | if (d) |
| 1124 | return d; |
| 1125 | |
| 1126 | /* short length > long length */ |
| 1127 | d = l2->length - l1->length; |
| 1128 | if (d) |
| 1129 | return d; |
| 1130 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1131 | /* read > read/write */ |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1132 | return (int)(l1->iomode == IOMODE_READ) - (int)(l2->iomode == IOMODE_READ); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1133 | } |
| 1134 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 1135 | static void |
Trond Myklebust | 57036a3 | 2012-09-20 16:33:30 -0400 | [diff] [blame] | 1136 | pnfs_layout_insert_lseg(struct pnfs_layout_hdr *lo, |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 1137 | struct pnfs_layout_segment *lseg) |
| 1138 | { |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1139 | struct pnfs_layout_segment *lp; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1140 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 1141 | dprintk("%s:Begin\n", __func__); |
| 1142 | |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 1143 | list_for_each_entry(lp, &lo->plh_segs, pls_list) { |
Trond Myklebust | 7dc0ac7 | 2013-06-03 11:30:24 -0400 | [diff] [blame] | 1144 | if (pnfs_lseg_range_cmp(&lseg->pls_range, &lp->pls_range) > 0) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1145 | continue; |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 1146 | list_add_tail(&lseg->pls_list, &lp->pls_list); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1147 | dprintk("%s: inserted lseg %p " |
| 1148 | "iomode %d offset %llu length %llu before " |
| 1149 | "lp %p iomode %d offset %llu length %llu\n", |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 1150 | __func__, lseg, lseg->pls_range.iomode, |
| 1151 | lseg->pls_range.offset, lseg->pls_range.length, |
| 1152 | lp, lp->pls_range.iomode, lp->pls_range.offset, |
| 1153 | lp->pls_range.length); |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1154 | goto out; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 1155 | } |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1156 | list_add_tail(&lseg->pls_list, &lo->plh_segs); |
| 1157 | dprintk("%s: inserted lseg %p " |
| 1158 | "iomode %d offset %llu length %llu at tail\n", |
| 1159 | __func__, lseg, lseg->pls_range.iomode, |
| 1160 | lseg->pls_range.offset, lseg->pls_range.length); |
| 1161 | out: |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 1162 | pnfs_get_layout_hdr(lo); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 1163 | |
| 1164 | dprintk("%s:Return\n", __func__); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1165 | } |
| 1166 | |
| 1167 | static struct pnfs_layout_hdr * |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 1168 | alloc_init_layout_hdr(struct inode *ino, |
| 1169 | struct nfs_open_context *ctx, |
| 1170 | gfp_t gfp_flags) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1171 | { |
| 1172 | struct pnfs_layout_hdr *lo; |
| 1173 | |
Benny Halevy | 636fb9c | 2011-05-22 19:51:33 +0300 | [diff] [blame] | 1174 | lo = pnfs_alloc_layout_hdr(ino, gfp_flags); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1175 | if (!lo) |
| 1176 | return NULL; |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 1177 | atomic_set(&lo->plh_refcount, 1); |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 1178 | INIT_LIST_HEAD(&lo->plh_layouts); |
| 1179 | INIT_LIST_HEAD(&lo->plh_segs); |
Trond Myklebust | fd9a8d7 | 2013-02-12 09:48:42 -0500 | [diff] [blame] | 1180 | INIT_LIST_HEAD(&lo->plh_bulk_destroy); |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 1181 | lo->plh_inode = ino; |
Trond Myklebust | 5cc2216 | 2013-05-21 09:26:49 -0400 | [diff] [blame] | 1182 | lo->plh_lc_cred = get_rpccred(ctx->cred); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1183 | return lo; |
| 1184 | } |
| 1185 | |
| 1186 | static struct pnfs_layout_hdr * |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 1187 | pnfs_find_alloc_layout(struct inode *ino, |
| 1188 | struct nfs_open_context *ctx, |
| 1189 | gfp_t gfp_flags) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1190 | { |
| 1191 | struct nfs_inode *nfsi = NFS_I(ino); |
| 1192 | struct pnfs_layout_hdr *new = NULL; |
| 1193 | |
| 1194 | dprintk("%s Begin ino=%p layout=%p\n", __func__, ino, nfsi->layout); |
| 1195 | |
Trond Myklebust | 251ec41 | 2012-10-02 15:41:05 -0700 | [diff] [blame] | 1196 | if (nfsi->layout != NULL) |
| 1197 | goto out_existing; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1198 | spin_unlock(&ino->i_lock); |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 1199 | new = alloc_init_layout_hdr(ino, ctx, gfp_flags); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1200 | spin_lock(&ino->i_lock); |
| 1201 | |
Trond Myklebust | 251ec41 | 2012-10-02 15:41:05 -0700 | [diff] [blame] | 1202 | if (likely(nfsi->layout == NULL)) { /* Won the race? */ |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1203 | nfsi->layout = new; |
Trond Myklebust | 251ec41 | 2012-10-02 15:41:05 -0700 | [diff] [blame] | 1204 | return new; |
Yanchuan Nian | 7175fe9 | 2012-10-31 16:05:48 +0800 | [diff] [blame] | 1205 | } else if (new != NULL) |
| 1206 | pnfs_free_layout_hdr(new); |
Trond Myklebust | 251ec41 | 2012-10-02 15:41:05 -0700 | [diff] [blame] | 1207 | out_existing: |
| 1208 | pnfs_get_layout_hdr(nfsi->layout); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1209 | return nfsi->layout; |
| 1210 | } |
| 1211 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1212 | /* |
| 1213 | * iomode matching rules: |
| 1214 | * iomode lseg match |
| 1215 | * ----- ----- ----- |
| 1216 | * ANY READ true |
| 1217 | * ANY RW true |
| 1218 | * RW READ false |
| 1219 | * RW RW true |
| 1220 | * READ READ true |
| 1221 | * READ RW true |
| 1222 | */ |
Trond Myklebust | 3cb2df1 | 2013-06-03 11:24:36 -0400 | [diff] [blame] | 1223 | static bool |
Trond Myklebust | 7dc0ac7 | 2013-06-03 11:30:24 -0400 | [diff] [blame] | 1224 | pnfs_lseg_range_match(const struct pnfs_layout_range *ls_range, |
Trond Myklebust | 3cb2df1 | 2013-06-03 11:24:36 -0400 | [diff] [blame] | 1225 | const struct pnfs_layout_range *range) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1226 | { |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1227 | struct pnfs_layout_range range1; |
| 1228 | |
| 1229 | if ((range->iomode == IOMODE_RW && |
| 1230 | ls_range->iomode != IOMODE_RW) || |
Trond Myklebust | 7dc0ac7 | 2013-06-03 11:30:24 -0400 | [diff] [blame] | 1231 | !pnfs_lseg_range_intersecting(ls_range, range)) |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1232 | return 0; |
| 1233 | |
| 1234 | /* range1 covers only the first byte in the range */ |
| 1235 | range1 = *range; |
| 1236 | range1.length = 1; |
Trond Myklebust | 7dc0ac7 | 2013-06-03 11:30:24 -0400 | [diff] [blame] | 1237 | return pnfs_lseg_range_contained(ls_range, &range1); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1238 | } |
| 1239 | |
| 1240 | /* |
| 1241 | * lookup range in layout |
| 1242 | */ |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1243 | static struct pnfs_layout_segment * |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1244 | pnfs_find_lseg(struct pnfs_layout_hdr *lo, |
| 1245 | struct pnfs_layout_range *range) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1246 | { |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1247 | struct pnfs_layout_segment *lseg, *ret = NULL; |
| 1248 | |
| 1249 | dprintk("%s:Begin\n", __func__); |
| 1250 | |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 1251 | list_for_each_entry(lseg, &lo->plh_segs, pls_list) { |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 1252 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) && |
Peng Tao | ce6ab4f | 2014-09-06 00:53:24 +0800 | [diff] [blame] | 1253 | !test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags) && |
Trond Myklebust | 7dc0ac7 | 2013-06-03 11:30:24 -0400 | [diff] [blame] | 1254 | pnfs_lseg_range_match(&lseg->pls_range, range)) { |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1255 | ret = pnfs_get_lseg(lseg); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1256 | break; |
| 1257 | } |
Benny Halevy | d771e3a | 2011-06-14 16:30:16 -0400 | [diff] [blame] | 1258 | if (lseg->pls_range.offset > range->offset) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1259 | break; |
| 1260 | } |
| 1261 | |
| 1262 | dprintk("%s:Return lseg %p ref %d\n", |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 1263 | __func__, ret, ret ? atomic_read(&ret->pls_refcount) : 0); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1264 | return ret; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1265 | } |
| 1266 | |
| 1267 | /* |
Andy Adamson | d23d61c | 2012-05-23 05:02:37 -0400 | [diff] [blame] | 1268 | * Use mdsthreshold hints set at each OPEN to determine if I/O should go |
| 1269 | * to the MDS or over pNFS |
| 1270 | * |
| 1271 | * The nfs_inode read_io and write_io fields are cumulative counters reset |
| 1272 | * when there are no layout segments. Note that in pnfs_update_layout iomode |
| 1273 | * is set to IOMODE_READ for a READ request, and set to IOMODE_RW for a |
| 1274 | * WRITE request. |
| 1275 | * |
| 1276 | * A return of true means use MDS I/O. |
| 1277 | * |
| 1278 | * From rfc 5661: |
| 1279 | * If a file's size is smaller than the file size threshold, data accesses |
| 1280 | * SHOULD be sent to the metadata server. If an I/O request has a length that |
| 1281 | * is below the I/O size threshold, the I/O SHOULD be sent to the metadata |
| 1282 | * server. If both file size and I/O size are provided, the client SHOULD |
| 1283 | * reach or exceed both thresholds before sending its read or write |
| 1284 | * requests to the data server. |
| 1285 | */ |
| 1286 | static bool pnfs_within_mdsthreshold(struct nfs_open_context *ctx, |
| 1287 | struct inode *ino, int iomode) |
| 1288 | { |
| 1289 | struct nfs4_threshold *t = ctx->mdsthreshold; |
| 1290 | struct nfs_inode *nfsi = NFS_I(ino); |
| 1291 | loff_t fsize = i_size_read(ino); |
| 1292 | bool size = false, size_set = false, io = false, io_set = false, ret = false; |
| 1293 | |
| 1294 | if (t == NULL) |
| 1295 | return ret; |
| 1296 | |
| 1297 | dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n", |
| 1298 | __func__, t->bm, t->rd_sz, t->wr_sz, t->rd_io_sz, t->wr_io_sz); |
| 1299 | |
| 1300 | switch (iomode) { |
| 1301 | case IOMODE_READ: |
| 1302 | if (t->bm & THRESHOLD_RD) { |
| 1303 | dprintk("%s fsize %llu\n", __func__, fsize); |
| 1304 | size_set = true; |
| 1305 | if (fsize < t->rd_sz) |
| 1306 | size = true; |
| 1307 | } |
| 1308 | if (t->bm & THRESHOLD_RD_IO) { |
| 1309 | dprintk("%s nfsi->read_io %llu\n", __func__, |
| 1310 | nfsi->read_io); |
| 1311 | io_set = true; |
| 1312 | if (nfsi->read_io < t->rd_io_sz) |
| 1313 | io = true; |
| 1314 | } |
| 1315 | break; |
| 1316 | case IOMODE_RW: |
| 1317 | if (t->bm & THRESHOLD_WR) { |
| 1318 | dprintk("%s fsize %llu\n", __func__, fsize); |
| 1319 | size_set = true; |
| 1320 | if (fsize < t->wr_sz) |
| 1321 | size = true; |
| 1322 | } |
| 1323 | if (t->bm & THRESHOLD_WR_IO) { |
| 1324 | dprintk("%s nfsi->write_io %llu\n", __func__, |
| 1325 | nfsi->write_io); |
| 1326 | io_set = true; |
| 1327 | if (nfsi->write_io < t->wr_io_sz) |
| 1328 | io = true; |
| 1329 | } |
| 1330 | break; |
| 1331 | } |
| 1332 | if (size_set && io_set) { |
| 1333 | if (size && io) |
| 1334 | ret = true; |
| 1335 | } else if (size || io) |
| 1336 | ret = true; |
| 1337 | |
| 1338 | dprintk("<-- %s size %d io %d ret %d\n", __func__, size, io, ret); |
| 1339 | return ret; |
| 1340 | } |
| 1341 | |
| 1342 | /* |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1343 | * Layout segment is retreived from the server if not cached. |
| 1344 | * The appropriate layout segment is referenced and returned to the caller. |
| 1345 | */ |
Andy Adamson | 7c24d94 | 2011-06-13 18:22:38 -0400 | [diff] [blame] | 1346 | struct pnfs_layout_segment * |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1347 | pnfs_update_layout(struct inode *ino, |
| 1348 | struct nfs_open_context *ctx, |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1349 | loff_t pos, |
| 1350 | u64 count, |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 1351 | enum pnfs_iomode iomode, |
| 1352 | gfp_t gfp_flags) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1353 | { |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1354 | struct pnfs_layout_range arg = { |
| 1355 | .iomode = iomode, |
| 1356 | .offset = pos, |
| 1357 | .length = count, |
| 1358 | }; |
Benny Halevy | 707ed5f | 2011-05-22 19:47:46 +0300 | [diff] [blame] | 1359 | unsigned pg_offset; |
Weston Andros Adamson | 6382a44 | 2011-06-01 16:44:44 -0400 | [diff] [blame] | 1360 | struct nfs_server *server = NFS_SERVER(ino); |
| 1361 | struct nfs_client *clp = server->nfs_client; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1362 | struct pnfs_layout_hdr *lo; |
| 1363 | struct pnfs_layout_segment *lseg = NULL; |
Peng Tao | 9bf8748 | 2014-08-22 17:37:41 +0800 | [diff] [blame] | 1364 | bool first; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1365 | |
| 1366 | if (!pnfs_enabled_sb(NFS_SERVER(ino))) |
Trond Myklebust | f86bbcf | 2012-09-26 11:21:40 -0400 | [diff] [blame] | 1367 | goto out; |
Andy Adamson | d23d61c | 2012-05-23 05:02:37 -0400 | [diff] [blame] | 1368 | |
| 1369 | if (pnfs_within_mdsthreshold(ctx, ino, iomode)) |
Trond Myklebust | f86bbcf | 2012-09-26 11:21:40 -0400 | [diff] [blame] | 1370 | goto out; |
Andy Adamson | d23d61c | 2012-05-23 05:02:37 -0400 | [diff] [blame] | 1371 | |
Peng Tao | 9bf8748 | 2014-08-22 17:37:41 +0800 | [diff] [blame] | 1372 | lookup_again: |
| 1373 | first = false; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1374 | spin_lock(&ino->i_lock); |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 1375 | lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags); |
Trond Myklebust | 830ffb5 | 2012-09-20 21:25:19 -0400 | [diff] [blame] | 1376 | if (lo == NULL) { |
| 1377 | spin_unlock(&ino->i_lock); |
| 1378 | goto out; |
| 1379 | } |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1380 | |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 1381 | /* Do we even need to bother with this? */ |
Trond Myklebust | a59c30a | 2012-03-01 11:17:47 -0500 | [diff] [blame] | 1382 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 1383 | dprintk("%s matches recall, use MDS\n", __func__); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1384 | goto out_unlock; |
| 1385 | } |
| 1386 | |
| 1387 | /* if LAYOUTGET already failed once we don't try again */ |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 1388 | if (pnfs_layout_io_test_failed(lo, iomode)) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1389 | goto out_unlock; |
| 1390 | |
Peng Tao | 9bf8748 | 2014-08-22 17:37:41 +0800 | [diff] [blame] | 1391 | first = list_empty(&lo->plh_segs); |
| 1392 | if (first) { |
| 1393 | /* The first layoutget for the file. Need to serialize per |
| 1394 | * RFC 5661 Errata 3208. |
| 1395 | */ |
| 1396 | if (test_and_set_bit(NFS_LAYOUT_FIRST_LAYOUTGET, |
| 1397 | &lo->plh_flags)) { |
| 1398 | spin_unlock(&ino->i_lock); |
| 1399 | wait_on_bit(&lo->plh_flags, NFS_LAYOUT_FIRST_LAYOUTGET, |
| 1400 | TASK_UNINTERRUPTIBLE); |
| 1401 | pnfs_put_layout_hdr(lo); |
| 1402 | goto lookup_again; |
| 1403 | } |
| 1404 | } else { |
| 1405 | /* Check to see if the layout for the given range |
| 1406 | * already exists |
| 1407 | */ |
| 1408 | lseg = pnfs_find_lseg(lo, &arg); |
| 1409 | if (lseg) |
| 1410 | goto out_unlock; |
| 1411 | } |
Andy Adamson | 568e8c4 | 2011-03-01 01:34:22 +0000 | [diff] [blame] | 1412 | |
Peng Tao | ce6ab4f | 2014-09-06 00:53:24 +0800 | [diff] [blame] | 1413 | if (pnfs_layoutgets_blocked(lo, &arg, 0)) |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 1414 | goto out_unlock; |
| 1415 | atomic_inc(&lo->plh_outstanding); |
Fred Isaman | f49f9ba | 2011-02-03 18:28:52 +0000 | [diff] [blame] | 1416 | spin_unlock(&ino->i_lock); |
Weston Andros Adamson | 3000512 | 2013-02-28 20:30:10 -0500 | [diff] [blame] | 1417 | |
Peng Tao | abb9a00 | 2014-08-22 17:37:40 +0800 | [diff] [blame] | 1418 | if (list_empty(&lo->plh_layouts)) { |
Fred Isaman | 2130ff6 | 2011-01-06 11:36:26 +0000 | [diff] [blame] | 1419 | /* The lo must be on the clp list if there is any |
| 1420 | * chance of a CB_LAYOUTRECALL(FILE) coming in. |
| 1421 | */ |
| 1422 | spin_lock(&clp->cl_lock); |
Peng Tao | abb9a00 | 2014-08-22 17:37:40 +0800 | [diff] [blame] | 1423 | if (list_empty(&lo->plh_layouts)) |
| 1424 | list_add_tail(&lo->plh_layouts, &server->layouts); |
Fred Isaman | 2130ff6 | 2011-01-06 11:36:26 +0000 | [diff] [blame] | 1425 | spin_unlock(&clp->cl_lock); |
| 1426 | } |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1427 | |
Benny Halevy | 707ed5f | 2011-05-22 19:47:46 +0300 | [diff] [blame] | 1428 | pg_offset = arg.offset & ~PAGE_CACHE_MASK; |
| 1429 | if (pg_offset) { |
| 1430 | arg.offset -= pg_offset; |
| 1431 | arg.length += pg_offset; |
| 1432 | } |
Andy Adamson | 7c24d94 | 2011-06-13 18:22:38 -0400 | [diff] [blame] | 1433 | if (arg.length != NFS4_MAX_UINT64) |
| 1434 | arg.length = PAGE_CACHE_ALIGN(arg.length); |
Benny Halevy | 707ed5f | 2011-05-22 19:47:46 +0300 | [diff] [blame] | 1435 | |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1436 | lseg = send_layoutget(lo, ctx, &arg, gfp_flags); |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 1437 | atomic_dec(&lo->plh_outstanding); |
Trond Myklebust | 830ffb5 | 2012-09-20 21:25:19 -0400 | [diff] [blame] | 1438 | out_put_layout_hdr: |
Peng Tao | 9bf8748 | 2014-08-22 17:37:41 +0800 | [diff] [blame] | 1439 | if (first) { |
| 1440 | unsigned long *bitlock = &lo->plh_flags; |
| 1441 | |
| 1442 | clear_bit_unlock(NFS_LAYOUT_FIRST_LAYOUTGET, bitlock); |
| 1443 | smp_mb__after_atomic(); |
| 1444 | wake_up_bit(bitlock, NFS_LAYOUT_FIRST_LAYOUTGET); |
| 1445 | } |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 1446 | pnfs_put_layout_hdr(lo); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1447 | out: |
Trond Myklebust | f86bbcf | 2012-09-26 11:21:40 -0400 | [diff] [blame] | 1448 | dprintk("%s: inode %s/%llu pNFS layout segment %s for " |
| 1449 | "(%s, offset: %llu, length: %llu)\n", |
| 1450 | __func__, ino->i_sb->s_id, |
| 1451 | (unsigned long long)NFS_FILEID(ino), |
| 1452 | lseg == NULL ? "not found" : "found", |
| 1453 | iomode==IOMODE_RW ? "read/write" : "read-only", |
| 1454 | (unsigned long long)pos, |
| 1455 | (unsigned long long)count); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1456 | return lseg; |
| 1457 | out_unlock: |
| 1458 | spin_unlock(&ino->i_lock); |
Trond Myklebust | 830ffb5 | 2012-09-20 21:25:19 -0400 | [diff] [blame] | 1459 | goto out_put_layout_hdr; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1460 | } |
Andy Adamson | 7c24d94 | 2011-06-13 18:22:38 -0400 | [diff] [blame] | 1461 | EXPORT_SYMBOL_GPL(pnfs_update_layout); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1462 | |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 1463 | struct pnfs_layout_segment * |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1464 | pnfs_layout_process(struct nfs4_layoutget *lgp) |
| 1465 | { |
| 1466 | struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout; |
| 1467 | struct nfs4_layoutget_res *res = &lgp->res; |
| 1468 | struct pnfs_layout_segment *lseg; |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 1469 | struct inode *ino = lo->plh_inode; |
Trond Myklebust | 78096cc | 2014-02-12 10:02:27 -0500 | [diff] [blame] | 1470 | LIST_HEAD(free_me); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1471 | int status = 0; |
| 1472 | |
| 1473 | /* Inject layout blob into I/O device driver */ |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 1474 | lseg = NFS_SERVER(ino)->pnfs_curr_ld->alloc_lseg(lo, res, lgp->gfp_flags); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1475 | if (!lseg || IS_ERR(lseg)) { |
| 1476 | if (!lseg) |
| 1477 | status = -ENOMEM; |
| 1478 | else |
| 1479 | status = PTR_ERR(lseg); |
| 1480 | dprintk("%s: Could not allocate layout: error %d\n", |
| 1481 | __func__, status); |
| 1482 | goto out; |
| 1483 | } |
| 1484 | |
Christoph Hellwig | 1013df61 | 2014-08-21 11:09:18 -0500 | [diff] [blame] | 1485 | init_lseg(lo, lseg); |
| 1486 | lseg->pls_range = res->range; |
| 1487 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1488 | spin_lock(&ino->i_lock); |
Trond Myklebust | a59c30a | 2012-03-01 11:17:47 -0500 | [diff] [blame] | 1489 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 1490 | dprintk("%s forget reply due to recall\n", __func__); |
| 1491 | goto out_forget_reply; |
| 1492 | } |
| 1493 | |
Peng Tao | ce6ab4f | 2014-09-06 00:53:24 +0800 | [diff] [blame] | 1494 | if (pnfs_layoutgets_blocked(lo, &lgp->args.range, 1)) { |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 1495 | dprintk("%s forget reply due to state\n", __func__); |
| 1496 | goto out_forget_reply; |
| 1497 | } |
Trond Myklebust | 038d649 | 2012-10-02 16:38:41 -0700 | [diff] [blame] | 1498 | |
Christoph Hellwig | 362f747 | 2014-08-21 11:09:20 -0500 | [diff] [blame] | 1499 | if (nfs4_stateid_match_other(&lo->plh_stateid, &res->stateid)) { |
| 1500 | /* existing state ID, make sure the sequence number matches. */ |
| 1501 | if (pnfs_layout_stateid_blocked(lo, &res->stateid)) { |
| 1502 | dprintk("%s forget reply due to sequence\n", __func__); |
| 1503 | goto out_forget_reply; |
| 1504 | } |
| 1505 | pnfs_set_layout_stateid(lo, &res->stateid, false); |
| 1506 | } else { |
| 1507 | /* |
| 1508 | * We got an entirely new state ID. Mark all segments for the |
| 1509 | * inode invalid, and don't bother validating the stateid |
| 1510 | * sequence number. |
| 1511 | */ |
| 1512 | pnfs_mark_matching_lsegs_invalid(lo, &free_me, NULL); |
| 1513 | |
| 1514 | nfs4_stateid_copy(&lo->plh_stateid, &res->stateid); |
| 1515 | lo->plh_barrier = be32_to_cpu(res->stateid.seqid); |
| 1516 | } |
Trond Myklebust | 038d649 | 2012-10-02 16:38:41 -0700 | [diff] [blame] | 1517 | |
Christoph Hellwig | 47abade | 2014-08-21 11:09:22 -0500 | [diff] [blame] | 1518 | clear_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); |
| 1519 | |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1520 | pnfs_get_lseg(lseg); |
Trond Myklebust | 57036a3 | 2012-09-20 16:33:30 -0400 | [diff] [blame] | 1521 | pnfs_layout_insert_lseg(lo, lseg); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1522 | |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 1523 | if (res->return_on_close) { |
| 1524 | set_bit(NFS_LSEG_ROC, &lseg->pls_flags); |
| 1525 | set_bit(NFS_LAYOUT_ROC, &lo->plh_flags); |
| 1526 | } |
| 1527 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1528 | spin_unlock(&ino->i_lock); |
Trond Myklebust | 78096cc | 2014-02-12 10:02:27 -0500 | [diff] [blame] | 1529 | pnfs_free_lseg_list(&free_me); |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 1530 | return lseg; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1531 | out: |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 1532 | return ERR_PTR(status); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 1533 | |
| 1534 | out_forget_reply: |
| 1535 | spin_unlock(&ino->i_lock); |
| 1536 | lseg->pls_layout = lo; |
| 1537 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); |
| 1538 | goto out; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1539 | } |
| 1540 | |
Peng Tao | 016256d | 2014-09-06 00:53:23 +0800 | [diff] [blame] | 1541 | static void |
| 1542 | pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, |
| 1543 | struct list_head *tmp_list, |
| 1544 | struct pnfs_layout_range *return_range) |
| 1545 | { |
| 1546 | struct pnfs_layout_segment *lseg, *next; |
| 1547 | |
| 1548 | dprintk("%s:Begin lo %p\n", __func__, lo); |
| 1549 | |
| 1550 | if (list_empty(&lo->plh_segs)) |
| 1551 | return; |
| 1552 | |
| 1553 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
| 1554 | if (should_free_lseg(&lseg->pls_range, return_range)) { |
| 1555 | dprintk("%s: marking lseg %p iomode %d " |
| 1556 | "offset %llu length %llu\n", __func__, |
| 1557 | lseg, lseg->pls_range.iomode, |
| 1558 | lseg->pls_range.offset, |
| 1559 | lseg->pls_range.length); |
| 1560 | set_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags); |
| 1561 | mark_lseg_invalid(lseg, tmp_list); |
| 1562 | } |
| 1563 | } |
| 1564 | |
| 1565 | void pnfs_error_mark_layout_for_return(struct inode *inode, |
| 1566 | struct pnfs_layout_segment *lseg) |
| 1567 | { |
| 1568 | struct pnfs_layout_hdr *lo = NFS_I(inode)->layout; |
| 1569 | int iomode = pnfs_iomode_to_fail_bit(lseg->pls_range.iomode); |
| 1570 | struct pnfs_layout_range range = { |
| 1571 | .iomode = lseg->pls_range.iomode, |
| 1572 | .offset = 0, |
| 1573 | .length = NFS4_MAX_UINT64, |
| 1574 | }; |
| 1575 | LIST_HEAD(free_me); |
| 1576 | |
| 1577 | spin_lock(&inode->i_lock); |
| 1578 | /* set failure bit so that pnfs path will be retried later */ |
| 1579 | pnfs_layout_set_fail_bit(lo, iomode); |
| 1580 | set_bit(NFS_LAYOUT_RETURN, &lo->plh_flags); |
| 1581 | if (lo->plh_return_iomode == 0) |
| 1582 | lo->plh_return_iomode = range.iomode; |
| 1583 | else if (lo->plh_return_iomode != range.iomode) |
| 1584 | lo->plh_return_iomode = IOMODE_ANY; |
| 1585 | /* |
| 1586 | * mark all matching lsegs so that we are sure to have no live |
| 1587 | * segments at hand when sending layoutreturn. See pnfs_put_lseg() |
| 1588 | * for how it works. |
| 1589 | */ |
| 1590 | pnfs_mark_matching_lsegs_return(lo, &free_me, &range); |
| 1591 | spin_unlock(&inode->i_lock); |
| 1592 | pnfs_free_lseg_list(&free_me); |
| 1593 | } |
| 1594 | EXPORT_SYMBOL_GPL(pnfs_error_mark_layout_for_return); |
| 1595 | |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1596 | void |
| 1597 | pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) |
| 1598 | { |
Peng Tao | 1fd937b | 2012-09-25 14:55:57 +0800 | [diff] [blame] | 1599 | u64 rd_size = req->wb_bytes; |
| 1600 | |
Trond Myklebust | bc5a89b | 2012-10-15 14:58:04 -0400 | [diff] [blame] | 1601 | WARN_ON_ONCE(pgio->pg_lseg != NULL); |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1602 | |
Peng Tao | 1fd937b | 2012-09-25 14:55:57 +0800 | [diff] [blame] | 1603 | if (pgio->pg_dreq == NULL) |
| 1604 | rd_size = i_size_read(pgio->pg_inode) - req_offset(req); |
| 1605 | else |
| 1606 | rd_size = nfs_dreq_bytes_left(pgio->pg_dreq); |
| 1607 | |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1608 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
| 1609 | req->wb_context, |
| 1610 | req_offset(req), |
Peng Tao | 1fd937b | 2012-09-25 14:55:57 +0800 | [diff] [blame] | 1611 | rd_size, |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1612 | IOMODE_READ, |
| 1613 | GFP_KERNEL); |
Trond Myklebust | e885de1 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1614 | /* If no lseg, fall back to read through mds */ |
| 1615 | if (pgio->pg_lseg == NULL) |
Trond Myklebust | 1f94535 | 2011-07-13 15:59:57 -0400 | [diff] [blame] | 1616 | nfs_pageio_reset_read_mds(pgio); |
Trond Myklebust | e885de1 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1617 | |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1618 | } |
| 1619 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_read); |
| 1620 | |
| 1621 | void |
Peng Tao | 6296556 | 2012-09-25 14:55:57 +0800 | [diff] [blame] | 1622 | pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, |
| 1623 | struct nfs_page *req, u64 wb_size) |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1624 | { |
Trond Myklebust | bc5a89b | 2012-10-15 14:58:04 -0400 | [diff] [blame] | 1625 | WARN_ON_ONCE(pgio->pg_lseg != NULL); |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1626 | |
| 1627 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
| 1628 | req->wb_context, |
| 1629 | req_offset(req), |
Peng Tao | 6296556 | 2012-09-25 14:55:57 +0800 | [diff] [blame] | 1630 | wb_size, |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1631 | IOMODE_RW, |
| 1632 | GFP_NOFS); |
Trond Myklebust | e885de1 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1633 | /* If no lseg, fall back to write through mds */ |
| 1634 | if (pgio->pg_lseg == NULL) |
Trond Myklebust | 1f94535 | 2011-07-13 15:59:57 -0400 | [diff] [blame] | 1635 | nfs_pageio_reset_write_mds(pgio); |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1636 | } |
| 1637 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_write); |
| 1638 | |
Weston Andros Adamson | 180bb5e | 2014-09-10 15:48:01 -0400 | [diff] [blame] | 1639 | void |
| 1640 | pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *desc) |
| 1641 | { |
| 1642 | if (desc->pg_lseg) { |
| 1643 | pnfs_put_lseg(desc->pg_lseg); |
| 1644 | desc->pg_lseg = NULL; |
| 1645 | } |
| 1646 | } |
| 1647 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_cleanup); |
| 1648 | |
Weston Andros Adamson | b4fdac1 | 2014-05-15 11:56:43 -0400 | [diff] [blame] | 1649 | /* |
| 1650 | * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number |
| 1651 | * of bytes (maximum @req->wb_bytes) that can be coalesced. |
| 1652 | */ |
| 1653 | size_t |
Weston Andros Adamson | a7d42dd | 2014-09-19 10:55:07 -0400 | [diff] [blame] | 1654 | pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, |
| 1655 | struct nfs_page *prev, struct nfs_page *req) |
Fred Isaman | bae724e | 2011-03-01 01:34:15 +0000 | [diff] [blame] | 1656 | { |
Weston Andros Adamson | 0f9c429 | 2014-05-15 11:56:51 -0400 | [diff] [blame] | 1657 | unsigned int size; |
Weston Andros Adamson | c5e20cb | 2014-06-09 17:47:26 -0400 | [diff] [blame] | 1658 | u64 seg_end, req_start, seg_left; |
Weston Andros Adamson | 0f9c429 | 2014-05-15 11:56:51 -0400 | [diff] [blame] | 1659 | |
| 1660 | size = nfs_generic_pg_test(pgio, prev, req); |
Weston Andros Adamson | 0f9c429 | 2014-05-15 11:56:51 -0400 | [diff] [blame] | 1661 | if (!size) |
| 1662 | return 0; |
Benny Halevy | 89a58e3 | 2011-05-25 20:54:40 +0300 | [diff] [blame] | 1663 | |
Trond Myklebust | 19982ba | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1664 | /* |
Weston Andros Adamson | c5e20cb | 2014-06-09 17:47:26 -0400 | [diff] [blame] | 1665 | * 'size' contains the number of bytes left in the current page (up |
| 1666 | * to the original size asked for in @req->wb_bytes). |
| 1667 | * |
| 1668 | * Calculate how many bytes are left in the layout segment |
| 1669 | * and if there are less bytes than 'size', return that instead. |
Trond Myklebust | 19982ba | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1670 | * |
| 1671 | * Please also note that 'end_offset' is actually the offset of the |
| 1672 | * first byte that lies outside the pnfs_layout_range. FIXME? |
| 1673 | * |
| 1674 | */ |
Weston Andros Adamson | 19b5484 | 2014-05-15 11:56:55 -0400 | [diff] [blame] | 1675 | if (pgio->pg_lseg) { |
Weston Andros Adamson | c5e20cb | 2014-06-09 17:47:26 -0400 | [diff] [blame] | 1676 | seg_end = end_offset(pgio->pg_lseg->pls_range.offset, |
| 1677 | pgio->pg_lseg->pls_range.length); |
| 1678 | req_start = req_offset(req); |
| 1679 | WARN_ON_ONCE(req_start > seg_end); |
| 1680 | /* start of request is past the last byte of this segment */ |
| 1681 | if (req_start >= seg_end) |
Weston Andros Adamson | 19b5484 | 2014-05-15 11:56:55 -0400 | [diff] [blame] | 1682 | return 0; |
Weston Andros Adamson | c5e20cb | 2014-06-09 17:47:26 -0400 | [diff] [blame] | 1683 | |
| 1684 | /* adjust 'size' iff there are fewer bytes left in the |
| 1685 | * segment than what nfs_generic_pg_test returned */ |
| 1686 | seg_left = seg_end - req_start; |
| 1687 | if (seg_left < size) |
| 1688 | size = (unsigned int)seg_left; |
Weston Andros Adamson | 19b5484 | 2014-05-15 11:56:55 -0400 | [diff] [blame] | 1689 | } |
Weston Andros Adamson | 0f9c429 | 2014-05-15 11:56:51 -0400 | [diff] [blame] | 1690 | |
Weston Andros Adamson | 19b5484 | 2014-05-15 11:56:55 -0400 | [diff] [blame] | 1691 | return size; |
Fred Isaman | bae724e | 2011-03-01 01:34:15 +0000 | [diff] [blame] | 1692 | } |
Benny Halevy | 89a58e3 | 2011-05-25 20:54:40 +0300 | [diff] [blame] | 1693 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_test); |
Fred Isaman | bae724e | 2011-03-01 01:34:15 +0000 | [diff] [blame] | 1694 | |
Weston Andros Adamson | 53113ad | 2014-06-09 11:48:38 -0400 | [diff] [blame] | 1695 | int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *hdr) |
Trond Myklebust | e2fecb2 | 2012-01-06 08:57:46 -0500 | [diff] [blame] | 1696 | { |
| 1697 | struct nfs_pageio_descriptor pgio; |
Trond Myklebust | e2fecb2 | 2012-01-06 08:57:46 -0500 | [diff] [blame] | 1698 | |
| 1699 | /* Resend all requests through the MDS */ |
Weston Andros Adamson | 53113ad | 2014-06-09 11:48:38 -0400 | [diff] [blame] | 1700 | nfs_pageio_init_write(&pgio, hdr->inode, FLUSH_STABLE, true, |
| 1701 | hdr->completion_ops); |
| 1702 | return nfs_pageio_resend(&pgio, hdr); |
Trond Myklebust | e2fecb2 | 2012-01-06 08:57:46 -0500 | [diff] [blame] | 1703 | } |
Andy Adamson | e7dd79af | 2012-04-27 17:53:46 -0400 | [diff] [blame] | 1704 | EXPORT_SYMBOL_GPL(pnfs_write_done_resend_to_mds); |
Trond Myklebust | e2fecb2 | 2012-01-06 08:57:46 -0500 | [diff] [blame] | 1705 | |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1706 | static void pnfs_ld_handle_write_error(struct nfs_pgio_header *hdr) |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1707 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1708 | |
| 1709 | dprintk("pnfs write error = %d\n", hdr->pnfs_error); |
| 1710 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1711 | PNFS_LAYOUTRET_ON_ERROR) { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1712 | pnfs_return_layout(hdr->inode); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1713 | } |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1714 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
Weston Andros Adamson | 53113ad | 2014-06-09 11:48:38 -0400 | [diff] [blame] | 1715 | hdr->task.tk_status = pnfs_write_done_resend_to_mds(hdr); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1716 | } |
| 1717 | |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1718 | /* |
| 1719 | * Called by non rpc-based layout drivers |
| 1720 | */ |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1721 | void pnfs_ld_write_done(struct nfs_pgio_header *hdr) |
Fred Isaman | 94ad1c8 | 2011-03-01 01:34:14 +0000 | [diff] [blame] | 1722 | { |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1723 | trace_nfs4_pnfs_write(hdr, hdr->pnfs_error); |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1724 | if (!hdr->pnfs_error) { |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1725 | pnfs_set_layoutcommit(hdr); |
| 1726 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1727 | } else |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1728 | pnfs_ld_handle_write_error(hdr); |
| 1729 | hdr->mds_ops->rpc_release(hdr); |
Fred Isaman | 44b8379 | 2011-03-03 15:13:44 +0000 | [diff] [blame] | 1730 | } |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1731 | EXPORT_SYMBOL_GPL(pnfs_ld_write_done); |
Fred Isaman | 44b8379 | 2011-03-03 15:13:44 +0000 | [diff] [blame] | 1732 | |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1733 | static void |
| 1734 | pnfs_write_through_mds(struct nfs_pageio_descriptor *desc, |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1735 | struct nfs_pgio_header *hdr) |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1736 | { |
Peng Tao | 48d635f | 2014-11-10 08:35:35 +0800 | [diff] [blame] | 1737 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
Weston Andros Adamson | a7d42dd | 2014-09-19 10:55:07 -0400 | [diff] [blame] | 1738 | |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1739 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
Weston Andros Adamson | a7d42dd | 2014-09-19 10:55:07 -0400 | [diff] [blame] | 1740 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1741 | nfs_pageio_reset_write_mds(desc); |
Weston Andros Adamson | a7d42dd | 2014-09-19 10:55:07 -0400 | [diff] [blame] | 1742 | mirror->pg_recoalesce = 1; |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1743 | } |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1744 | nfs_pgio_data_destroy(hdr); |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1745 | } |
| 1746 | |
| 1747 | static enum pnfs_try_status |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1748 | pnfs_try_to_write_data(struct nfs_pgio_header *hdr, |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1749 | const struct rpc_call_ops *call_ops, |
| 1750 | struct pnfs_layout_segment *lseg, |
| 1751 | int how) |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1752 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1753 | struct inode *inode = hdr->inode; |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1754 | enum pnfs_try_status trypnfs; |
| 1755 | struct nfs_server *nfss = NFS_SERVER(inode); |
| 1756 | |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1757 | hdr->mds_ops = call_ops; |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1758 | |
| 1759 | dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__, |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1760 | inode->i_ino, hdr->args.count, hdr->args.offset, how); |
| 1761 | trypnfs = nfss->pnfs_curr_ld->write_pagelist(hdr, how); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1762 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1763 | nfs_inc_stats(inode, NFSIOS_PNFS_WRITE); |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1764 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
| 1765 | return trypnfs; |
| 1766 | } |
| 1767 | |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1768 | static void |
Weston Andros Adamson | 7f71472 | 2014-05-15 11:56:53 -0400 | [diff] [blame] | 1769 | pnfs_do_write(struct nfs_pageio_descriptor *desc, |
| 1770 | struct nfs_pgio_header *hdr, int how) |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1771 | { |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1772 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
| 1773 | struct pnfs_layout_segment *lseg = desc->pg_lseg; |
Weston Andros Adamson | 7f71472 | 2014-05-15 11:56:53 -0400 | [diff] [blame] | 1774 | enum pnfs_try_status trypnfs; |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1775 | |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1776 | trypnfs = pnfs_try_to_write_data(hdr, call_ops, lseg, how); |
Weston Andros Adamson | 7f71472 | 2014-05-15 11:56:53 -0400 | [diff] [blame] | 1777 | if (trypnfs == PNFS_NOT_ATTEMPTED) |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1778 | pnfs_write_through_mds(desc, hdr); |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1779 | } |
| 1780 | |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1781 | static void pnfs_writehdr_free(struct nfs_pgio_header *hdr) |
| 1782 | { |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1783 | pnfs_put_lseg(hdr->lseg); |
Weston Andros Adamson | 1e7f3a4 | 2014-06-09 11:48:33 -0400 | [diff] [blame] | 1784 | nfs_pgio_header_free(hdr); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1785 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1786 | EXPORT_SYMBOL_GPL(pnfs_writehdr_free); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1787 | |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1788 | int |
| 1789 | pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) |
| 1790 | { |
Peng Tao | 48d635f | 2014-11-10 08:35:35 +0800 | [diff] [blame] | 1791 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
Weston Andros Adamson | a7d42dd | 2014-09-19 10:55:07 -0400 | [diff] [blame] | 1792 | |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1793 | struct nfs_pgio_header *hdr; |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1794 | int ret; |
| 1795 | |
Weston Andros Adamson | 1e7f3a4 | 2014-06-09 11:48:33 -0400 | [diff] [blame] | 1796 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
| 1797 | if (!hdr) { |
Weston Andros Adamson | a7d42dd | 2014-09-19 10:55:07 -0400 | [diff] [blame] | 1798 | desc->pg_completion_ops->error_cleanup(&mirror->pg_list); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1799 | return -ENOMEM; |
| 1800 | } |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1801 | nfs_pgheader_init(desc, hdr, pnfs_writehdr_free); |
Weston Andros Adamson | 180bb5e | 2014-09-10 15:48:01 -0400 | [diff] [blame] | 1802 | |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1803 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
Anna Schumaker | ef2c488 | 2014-05-06 09:12:36 -0400 | [diff] [blame] | 1804 | ret = nfs_generic_pgio(desc, hdr); |
Weston Andros Adamson | 180bb5e | 2014-09-10 15:48:01 -0400 | [diff] [blame] | 1805 | if (!ret) |
Weston Andros Adamson | 7f71472 | 2014-05-15 11:56:53 -0400 | [diff] [blame] | 1806 | pnfs_do_write(desc, hdr, desc->pg_ioflags); |
Weston Andros Adamson | a7d42dd | 2014-09-19 10:55:07 -0400 | [diff] [blame] | 1807 | |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1808 | return ret; |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1809 | } |
| 1810 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages); |
| 1811 | |
Weston Andros Adamson | 53113ad | 2014-06-09 11:48:38 -0400 | [diff] [blame] | 1812 | int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *hdr) |
Trond Myklebust | 62e4a76 | 2011-11-10 14:30:37 -0500 | [diff] [blame] | 1813 | { |
| 1814 | struct nfs_pageio_descriptor pgio; |
| 1815 | |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1816 | /* Resend all requests through the MDS */ |
Weston Andros Adamson | 53113ad | 2014-06-09 11:48:38 -0400 | [diff] [blame] | 1817 | nfs_pageio_init_read(&pgio, hdr->inode, true, hdr->completion_ops); |
| 1818 | return nfs_pageio_resend(&pgio, hdr); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1819 | } |
Andy Adamson | e7dd79af | 2012-04-27 17:53:46 -0400 | [diff] [blame] | 1820 | EXPORT_SYMBOL_GPL(pnfs_read_done_resend_to_mds); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1821 | |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1822 | static void pnfs_ld_handle_read_error(struct nfs_pgio_header *hdr) |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1823 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1824 | dprintk("pnfs read error = %d\n", hdr->pnfs_error); |
| 1825 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1826 | PNFS_LAYOUTRET_ON_ERROR) { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1827 | pnfs_return_layout(hdr->inode); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1828 | } |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1829 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
Weston Andros Adamson | 53113ad | 2014-06-09 11:48:38 -0400 | [diff] [blame] | 1830 | hdr->task.tk_status = pnfs_read_done_resend_to_mds(hdr); |
Trond Myklebust | 62e4a76 | 2011-11-10 14:30:37 -0500 | [diff] [blame] | 1831 | } |
| 1832 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1833 | /* |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1834 | * Called by non rpc-based layout drivers |
| 1835 | */ |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1836 | void pnfs_ld_read_done(struct nfs_pgio_header *hdr) |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1837 | { |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1838 | trace_nfs4_pnfs_read(hdr, hdr->pnfs_error); |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1839 | if (likely(!hdr->pnfs_error)) { |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1840 | __nfs4_read_done_cb(hdr); |
| 1841 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); |
Trond Myklebust | 62e4a76 | 2011-11-10 14:30:37 -0500 | [diff] [blame] | 1842 | } else |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1843 | pnfs_ld_handle_read_error(hdr); |
| 1844 | hdr->mds_ops->rpc_release(hdr); |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1845 | } |
| 1846 | EXPORT_SYMBOL_GPL(pnfs_ld_read_done); |
| 1847 | |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1848 | static void |
| 1849 | pnfs_read_through_mds(struct nfs_pageio_descriptor *desc, |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1850 | struct nfs_pgio_header *hdr) |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1851 | { |
Peng Tao | 48d635f | 2014-11-10 08:35:35 +0800 | [diff] [blame] | 1852 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
Weston Andros Adamson | a7d42dd | 2014-09-19 10:55:07 -0400 | [diff] [blame] | 1853 | |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1854 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
Weston Andros Adamson | a7d42dd | 2014-09-19 10:55:07 -0400 | [diff] [blame] | 1855 | list_splice_tail_init(&hdr->pages, &mirror->pg_list); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1856 | nfs_pageio_reset_read_mds(desc); |
Weston Andros Adamson | a7d42dd | 2014-09-19 10:55:07 -0400 | [diff] [blame] | 1857 | mirror->pg_recoalesce = 1; |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1858 | } |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1859 | nfs_pgio_data_destroy(hdr); |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1860 | } |
| 1861 | |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1862 | /* |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1863 | * Call the appropriate parallel I/O subsystem read function. |
| 1864 | */ |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1865 | static enum pnfs_try_status |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1866 | pnfs_try_to_read_data(struct nfs_pgio_header *hdr, |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1867 | const struct rpc_call_ops *call_ops, |
| 1868 | struct pnfs_layout_segment *lseg) |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1869 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1870 | struct inode *inode = hdr->inode; |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1871 | struct nfs_server *nfss = NFS_SERVER(inode); |
| 1872 | enum pnfs_try_status trypnfs; |
| 1873 | |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1874 | hdr->mds_ops = call_ops; |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1875 | |
| 1876 | dprintk("%s: Reading ino:%lu %u@%llu\n", |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1877 | __func__, inode->i_ino, hdr->args.count, hdr->args.offset); |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1878 | |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1879 | trypnfs = nfss->pnfs_curr_ld->read_pagelist(hdr); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1880 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1881 | nfs_inc_stats(inode, NFSIOS_PNFS_READ); |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1882 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
| 1883 | return trypnfs; |
| 1884 | } |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1885 | |
Peng Tao | ceb11e1 | 2014-11-10 08:35:38 +0800 | [diff] [blame] | 1886 | /* Resend all requests through pnfs. */ |
| 1887 | int pnfs_read_resend_pnfs(struct nfs_pgio_header *hdr) |
| 1888 | { |
| 1889 | struct nfs_pageio_descriptor pgio; |
| 1890 | |
| 1891 | nfs_pageio_init_read(&pgio, hdr->inode, false, hdr->completion_ops); |
| 1892 | return nfs_pageio_resend(&pgio, hdr); |
| 1893 | } |
| 1894 | EXPORT_SYMBOL_GPL(pnfs_read_resend_pnfs); |
| 1895 | |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1896 | static void |
Weston Andros Adamson | 7f71472 | 2014-05-15 11:56:53 -0400 | [diff] [blame] | 1897 | pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr) |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1898 | { |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1899 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
| 1900 | struct pnfs_layout_segment *lseg = desc->pg_lseg; |
Weston Andros Adamson | 7f71472 | 2014-05-15 11:56:53 -0400 | [diff] [blame] | 1901 | enum pnfs_try_status trypnfs; |
Peng Tao | ceb11e1 | 2014-11-10 08:35:38 +0800 | [diff] [blame] | 1902 | int err = 0; |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1903 | |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1904 | trypnfs = pnfs_try_to_read_data(hdr, call_ops, lseg); |
Peng Tao | ceb11e1 | 2014-11-10 08:35:38 +0800 | [diff] [blame] | 1905 | if (trypnfs == PNFS_TRY_AGAIN) |
| 1906 | err = pnfs_read_resend_pnfs(hdr); |
| 1907 | if (trypnfs == PNFS_NOT_ATTEMPTED || err) |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1908 | pnfs_read_through_mds(desc, hdr); |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1909 | } |
| 1910 | |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1911 | static void pnfs_readhdr_free(struct nfs_pgio_header *hdr) |
| 1912 | { |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1913 | pnfs_put_lseg(hdr->lseg); |
Weston Andros Adamson | 1e7f3a4 | 2014-06-09 11:48:33 -0400 | [diff] [blame] | 1914 | nfs_pgio_header_free(hdr); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1915 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1916 | EXPORT_SYMBOL_GPL(pnfs_readhdr_free); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1917 | |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1918 | int |
| 1919 | pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc) |
| 1920 | { |
Peng Tao | 48d635f | 2014-11-10 08:35:35 +0800 | [diff] [blame] | 1921 | struct nfs_pgio_mirror *mirror = nfs_pgio_current_mirror(desc); |
Weston Andros Adamson | a7d42dd | 2014-09-19 10:55:07 -0400 | [diff] [blame] | 1922 | |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1923 | struct nfs_pgio_header *hdr; |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1924 | int ret; |
| 1925 | |
Weston Andros Adamson | 1e7f3a4 | 2014-06-09 11:48:33 -0400 | [diff] [blame] | 1926 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
| 1927 | if (!hdr) { |
Weston Andros Adamson | a7d42dd | 2014-09-19 10:55:07 -0400 | [diff] [blame] | 1928 | desc->pg_completion_ops->error_cleanup(&mirror->pg_list); |
Weston Andros Adamson | 180bb5e | 2014-09-10 15:48:01 -0400 | [diff] [blame] | 1929 | return -ENOMEM; |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1930 | } |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1931 | nfs_pgheader_init(desc, hdr, pnfs_readhdr_free); |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1932 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
Anna Schumaker | ef2c488 | 2014-05-06 09:12:36 -0400 | [diff] [blame] | 1933 | ret = nfs_generic_pgio(desc, hdr); |
Weston Andros Adamson | 180bb5e | 2014-09-10 15:48:01 -0400 | [diff] [blame] | 1934 | if (!ret) |
Weston Andros Adamson | 7f71472 | 2014-05-15 11:56:53 -0400 | [diff] [blame] | 1935 | pnfs_do_read(desc, hdr); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1936 | return ret; |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1937 | } |
| 1938 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_readpages); |
| 1939 | |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 1940 | static void pnfs_clear_layoutcommitting(struct inode *inode) |
| 1941 | { |
| 1942 | unsigned long *bitlock = &NFS_I(inode)->flags; |
| 1943 | |
| 1944 | clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock); |
Peter Zijlstra | 4e857c5 | 2014-03-17 18:06:10 +0100 | [diff] [blame] | 1945 | smp_mb__after_atomic(); |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 1946 | wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING); |
| 1947 | } |
| 1948 | |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1949 | /* |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1950 | * There can be multiple RW segments. |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1951 | */ |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1952 | static void pnfs_list_write_lseg(struct inode *inode, struct list_head *listp) |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1953 | { |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1954 | struct pnfs_layout_segment *lseg; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1955 | |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1956 | list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) { |
| 1957 | if (lseg->pls_range.iomode == IOMODE_RW && |
Trond Myklebust | a073dbf | 2013-03-20 12:34:32 -0400 | [diff] [blame] | 1958 | test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1959 | list_add(&lseg->pls_lc_list, listp); |
| 1960 | } |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1961 | } |
| 1962 | |
Trond Myklebust | a073dbf | 2013-03-20 12:34:32 -0400 | [diff] [blame] | 1963 | static void pnfs_list_write_lseg_done(struct inode *inode, struct list_head *listp) |
| 1964 | { |
| 1965 | struct pnfs_layout_segment *lseg, *tmp; |
Trond Myklebust | a073dbf | 2013-03-20 12:34:32 -0400 | [diff] [blame] | 1966 | |
| 1967 | /* Matched by references in pnfs_set_layoutcommit */ |
| 1968 | list_for_each_entry_safe(lseg, tmp, listp, pls_lc_list) { |
| 1969 | list_del_init(&lseg->pls_lc_list); |
| 1970 | pnfs_put_lseg(lseg); |
| 1971 | } |
| 1972 | |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 1973 | pnfs_clear_layoutcommitting(inode); |
Trond Myklebust | a073dbf | 2013-03-20 12:34:32 -0400 | [diff] [blame] | 1974 | } |
| 1975 | |
Peng Tao | 1b0ae06 | 2011-09-22 21:50:12 -0400 | [diff] [blame] | 1976 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg) |
| 1977 | { |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 1978 | pnfs_layout_io_set_failed(lseg->pls_layout, lseg->pls_range.iomode); |
Peng Tao | 1b0ae06 | 2011-09-22 21:50:12 -0400 | [diff] [blame] | 1979 | } |
| 1980 | EXPORT_SYMBOL_GPL(pnfs_set_lo_fail); |
| 1981 | |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1982 | void |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1983 | pnfs_set_layoutcommit(struct nfs_pgio_header *hdr) |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1984 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1985 | struct inode *inode = hdr->inode; |
| 1986 | struct nfs_inode *nfsi = NFS_I(inode); |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1987 | loff_t end_pos = hdr->mds_offset + hdr->res.count; |
Weston Andros Adamson | 79a48a1 | 2011-04-13 10:53:51 -0400 | [diff] [blame] | 1988 | bool mark_as_dirty = false; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1989 | |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1990 | spin_lock(&inode->i_lock); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1991 | if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { |
Weston Andros Adamson | 79a48a1 | 2011-04-13 10:53:51 -0400 | [diff] [blame] | 1992 | mark_as_dirty = true; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1993 | dprintk("%s: Set layoutcommit for inode %lu ", |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1994 | __func__, inode->i_ino); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1995 | } |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1996 | if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &hdr->lseg->pls_flags)) { |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1997 | /* references matched in nfs4_layoutcommit_release */ |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1998 | pnfs_get_lseg(hdr->lseg); |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1999 | } |
Peng Tao | acff5880 | 2011-07-30 20:52:31 -0400 | [diff] [blame] | 2000 | if (end_pos > nfsi->layout->plh_lwb) |
| 2001 | nfsi->layout->plh_lwb = end_pos; |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 2002 | spin_unlock(&inode->i_lock); |
Peng Tao | acff5880 | 2011-07-30 20:52:31 -0400 | [diff] [blame] | 2003 | dprintk("%s: lseg %p end_pos %llu\n", |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 2004 | __func__, hdr->lseg, nfsi->layout->plh_lwb); |
Weston Andros Adamson | 79a48a1 | 2011-04-13 10:53:51 -0400 | [diff] [blame] | 2005 | |
| 2006 | /* if pnfs_layoutcommit_inode() runs between inode locks, the next one |
| 2007 | * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ |
| 2008 | if (mark_as_dirty) |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 2009 | mark_inode_dirty_sync(inode); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 2010 | } |
| 2011 | EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit); |
| 2012 | |
Peng Tao | 378520b | 2014-08-07 10:15:02 +0800 | [diff] [blame] | 2013 | void pnfs_commit_set_layoutcommit(struct nfs_commit_data *data) |
| 2014 | { |
| 2015 | struct inode *inode = data->inode; |
| 2016 | struct nfs_inode *nfsi = NFS_I(inode); |
| 2017 | bool mark_as_dirty = false; |
| 2018 | |
| 2019 | spin_lock(&inode->i_lock); |
| 2020 | if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { |
| 2021 | mark_as_dirty = true; |
| 2022 | dprintk("%s: Set layoutcommit for inode %lu ", |
| 2023 | __func__, inode->i_ino); |
| 2024 | } |
| 2025 | if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &data->lseg->pls_flags)) { |
| 2026 | /* references matched in nfs4_layoutcommit_release */ |
| 2027 | pnfs_get_lseg(data->lseg); |
| 2028 | } |
| 2029 | if (data->lwb > nfsi->layout->plh_lwb) |
| 2030 | nfsi->layout->plh_lwb = data->lwb; |
| 2031 | spin_unlock(&inode->i_lock); |
| 2032 | dprintk("%s: lseg %p end_pos %llu\n", |
| 2033 | __func__, data->lseg, nfsi->layout->plh_lwb); |
| 2034 | |
| 2035 | /* if pnfs_layoutcommit_inode() runs between inode locks, the next one |
| 2036 | * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ |
| 2037 | if (mark_as_dirty) |
| 2038 | mark_inode_dirty_sync(inode); |
| 2039 | } |
| 2040 | EXPORT_SYMBOL_GPL(pnfs_commit_set_layoutcommit); |
| 2041 | |
Andy Adamson | db29c08 | 2011-07-30 20:52:38 -0400 | [diff] [blame] | 2042 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data) |
| 2043 | { |
| 2044 | struct nfs_server *nfss = NFS_SERVER(data->args.inode); |
| 2045 | |
| 2046 | if (nfss->pnfs_curr_ld->cleanup_layoutcommit) |
| 2047 | nfss->pnfs_curr_ld->cleanup_layoutcommit(data); |
Trond Myklebust | a073dbf | 2013-03-20 12:34:32 -0400 | [diff] [blame] | 2048 | pnfs_list_write_lseg_done(data->args.inode, &data->lseg_list); |
Andy Adamson | db29c08 | 2011-07-30 20:52:38 -0400 | [diff] [blame] | 2049 | } |
| 2050 | |
Andy Adamson | de4b15c | 2011-03-12 02:58:09 -0500 | [diff] [blame] | 2051 | /* |
| 2052 | * For the LAYOUT4_NFSV4_1_FILES layout type, NFS_DATA_SYNC WRITEs and |
| 2053 | * NFS_UNSTABLE WRITEs with a COMMIT to data servers must store enough |
| 2054 | * data to disk to allow the server to recover the data if it crashes. |
| 2055 | * LAYOUTCOMMIT is only needed when the NFL4_UFLG_COMMIT_THRU_MDS flag |
| 2056 | * is off, and a COMMIT is sent to a data server, or |
| 2057 | * if WRITEs to a data server return NFS_DATA_SYNC. |
| 2058 | */ |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 2059 | int |
Andy Adamson | ef31153 | 2011-03-12 02:58:10 -0500 | [diff] [blame] | 2060 | pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 2061 | { |
Christoph Hellwig | 5f919c9 | 2014-08-21 11:09:25 -0500 | [diff] [blame] | 2062 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 2063 | struct nfs4_layoutcommit_data *data; |
| 2064 | struct nfs_inode *nfsi = NFS_I(inode); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 2065 | loff_t end_pos; |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 2066 | int status; |
| 2067 | |
| 2068 | if (!pnfs_layoutcommit_outstanding(inode)) |
| 2069 | return 0; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 2070 | |
| 2071 | dprintk("--> %s inode %lu\n", __func__, inode->i_ino); |
| 2072 | |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 2073 | status = -EAGAIN; |
| 2074 | if (test_and_set_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags)) { |
| 2075 | if (!sync) |
| 2076 | goto out; |
NeilBrown | 7431620 | 2014-07-07 15:16:04 +1000 | [diff] [blame] | 2077 | status = wait_on_bit_lock_action(&nfsi->flags, |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 2078 | NFS_INO_LAYOUTCOMMITTING, |
| 2079 | nfs_wait_bit_killable, |
| 2080 | TASK_KILLABLE); |
| 2081 | if (status) |
| 2082 | goto out; |
| 2083 | } |
Andy Adamson | de4b15c | 2011-03-12 02:58:09 -0500 | [diff] [blame] | 2084 | |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 2085 | status = -ENOMEM; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 2086 | /* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */ |
| 2087 | data = kzalloc(sizeof(*data), GFP_NOFS); |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 2088 | if (!data) |
| 2089 | goto clear_layoutcommitting; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 2090 | |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 2091 | status = 0; |
| 2092 | spin_lock(&inode->i_lock); |
| 2093 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
| 2094 | goto out_unlock; |
Peng Tao | 92407e7 | 2011-10-23 20:21:17 -0700 | [diff] [blame] | 2095 | |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 2096 | INIT_LIST_HEAD(&data->lseg_list); |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 2097 | pnfs_list_write_lseg(inode, &data->lseg_list); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 2098 | |
Peng Tao | acff5880 | 2011-07-30 20:52:31 -0400 | [diff] [blame] | 2099 | end_pos = nfsi->layout->plh_lwb; |
Peng Tao | acff5880 | 2011-07-30 20:52:31 -0400 | [diff] [blame] | 2100 | nfsi->layout->plh_lwb = 0; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 2101 | |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 2102 | nfs4_stateid_copy(&data->args.stateid, &nfsi->layout->plh_stateid); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 2103 | spin_unlock(&inode->i_lock); |
| 2104 | |
| 2105 | data->args.inode = inode; |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 2106 | data->cred = get_rpccred(nfsi->layout->plh_lc_cred); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 2107 | nfs_fattr_init(&data->fattr); |
| 2108 | data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; |
| 2109 | data->res.fattr = &data->fattr; |
| 2110 | data->args.lastbytewritten = end_pos - 1; |
| 2111 | data->res.server = NFS_SERVER(inode); |
| 2112 | |
Christoph Hellwig | 5f919c9 | 2014-08-21 11:09:25 -0500 | [diff] [blame] | 2113 | if (ld->prepare_layoutcommit) { |
| 2114 | status = ld->prepare_layoutcommit(&data->args); |
| 2115 | if (status) { |
| 2116 | spin_lock(&inode->i_lock); |
| 2117 | if (end_pos < nfsi->layout->plh_lwb) |
| 2118 | nfsi->layout->plh_lwb = end_pos; |
| 2119 | spin_unlock(&inode->i_lock); |
| 2120 | put_rpccred(data->cred); |
| 2121 | set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags); |
| 2122 | goto clear_layoutcommitting; |
| 2123 | } |
| 2124 | } |
| 2125 | |
| 2126 | |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 2127 | status = nfs4_proc_layoutcommit(data, sync); |
| 2128 | out: |
Peng Tao | 92407e7 | 2011-10-23 20:21:17 -0700 | [diff] [blame] | 2129 | if (status) |
| 2130 | mark_inode_dirty_sync(inode); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 2131 | dprintk("<-- %s status %d\n", __func__, status); |
| 2132 | return status; |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 2133 | out_unlock: |
| 2134 | spin_unlock(&inode->i_lock); |
Peng Tao | 92407e7 | 2011-10-23 20:21:17 -0700 | [diff] [blame] | 2135 | kfree(data); |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 2136 | clear_layoutcommitting: |
| 2137 | pnfs_clear_layoutcommitting(inode); |
Peng Tao | 92407e7 | 2011-10-23 20:21:17 -0700 | [diff] [blame] | 2138 | goto out; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 2139 | } |
Peng Tao | 72cff44 | 2014-08-07 10:12:38 +0800 | [diff] [blame] | 2140 | EXPORT_SYMBOL_GPL(pnfs_layoutcommit_inode); |
Andy Adamson | 82be417 | 2012-05-23 05:02:35 -0400 | [diff] [blame] | 2141 | |
| 2142 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) |
| 2143 | { |
| 2144 | struct nfs4_threshold *thp; |
| 2145 | |
| 2146 | thp = kzalloc(sizeof(*thp), GFP_NOFS); |
| 2147 | if (!thp) { |
| 2148 | dprintk("%s mdsthreshold allocation failed\n", __func__); |
| 2149 | return NULL; |
| 2150 | } |
| 2151 | return thp; |
| 2152 | } |