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" |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 36 | |
| 37 | #define NFSDBG_FACILITY NFSDBG_PNFS |
Trond Myklebust | 25c7533 | 2012-09-18 17:01:12 -0400 | [diff] [blame] | 38 | #define PNFS_LAYOUTGET_RETRY_TIMEOUT (120*HZ) |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 39 | |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 40 | /* Locking: |
| 41 | * |
| 42 | * pnfs_spinlock: |
| 43 | * protects pnfs_modules_tbl. |
| 44 | */ |
| 45 | static DEFINE_SPINLOCK(pnfs_spinlock); |
| 46 | |
| 47 | /* |
| 48 | * pnfs_modules_tbl holds all pnfs modules |
| 49 | */ |
| 50 | static LIST_HEAD(pnfs_modules_tbl); |
| 51 | |
| 52 | /* Return the registered pnfs layout driver module matching given id */ |
| 53 | static struct pnfs_layoutdriver_type * |
| 54 | find_pnfs_driver_locked(u32 id) |
| 55 | { |
| 56 | struct pnfs_layoutdriver_type *local; |
| 57 | |
| 58 | list_for_each_entry(local, &pnfs_modules_tbl, pnfs_tblid) |
| 59 | if (local->id == id) |
| 60 | goto out; |
| 61 | local = NULL; |
| 62 | out: |
| 63 | dprintk("%s: Searching for id %u, found %p\n", __func__, id, local); |
| 64 | return local; |
| 65 | } |
| 66 | |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 67 | static struct pnfs_layoutdriver_type * |
| 68 | find_pnfs_driver(u32 id) |
| 69 | { |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 70 | struct pnfs_layoutdriver_type *local; |
| 71 | |
| 72 | spin_lock(&pnfs_spinlock); |
| 73 | local = find_pnfs_driver_locked(id); |
Trond Myklebust | 0a9c63f | 2012-06-15 13:02:58 -0400 | [diff] [blame] | 74 | if (local != NULL && !try_module_get(local->owner)) { |
| 75 | dprintk("%s: Could not grab reference on module\n", __func__); |
| 76 | local = NULL; |
| 77 | } |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 78 | spin_unlock(&pnfs_spinlock); |
| 79 | return local; |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 80 | } |
| 81 | |
| 82 | void |
| 83 | unset_pnfs_layoutdriver(struct nfs_server *nfss) |
| 84 | { |
Benny Halevy | 738fd0f3 | 2011-07-30 20:52:36 -0400 | [diff] [blame] | 85 | if (nfss->pnfs_curr_ld) { |
| 86 | if (nfss->pnfs_curr_ld->clear_layoutdriver) |
| 87 | nfss->pnfs_curr_ld->clear_layoutdriver(nfss); |
Trond Myklebust | 2a4c899 | 2012-06-14 13:08:38 -0400 | [diff] [blame] | 88 | /* Decrement the MDS count. Purge the deviceid cache if zero */ |
| 89 | if (atomic_dec_and_test(&nfss->nfs_client->cl_mds_count)) |
| 90 | nfs4_deviceid_purge_client(nfss->nfs_client); |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 91 | module_put(nfss->pnfs_curr_ld->owner); |
Benny Halevy | 738fd0f3 | 2011-07-30 20:52:36 -0400 | [diff] [blame] | 92 | } |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 93 | nfss->pnfs_curr_ld = NULL; |
| 94 | } |
| 95 | |
| 96 | /* |
| 97 | * Try to set the server's pnfs module to the pnfs layout type specified by id. |
| 98 | * Currently only one pNFS layout driver per filesystem is supported. |
| 99 | * |
| 100 | * @id layout type. Zero (illegal layout type) indicates pNFS not in use. |
| 101 | */ |
| 102 | void |
Benny Halevy | 738fd0f3 | 2011-07-30 20:52:36 -0400 | [diff] [blame] | 103 | set_pnfs_layoutdriver(struct nfs_server *server, const struct nfs_fh *mntfh, |
| 104 | u32 id) |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 105 | { |
| 106 | struct pnfs_layoutdriver_type *ld_type = NULL; |
| 107 | |
| 108 | if (id == 0) |
| 109 | goto out_no_driver; |
| 110 | if (!(server->nfs_client->cl_exchange_flags & |
| 111 | (EXCHGID4_FLAG_USE_NON_PNFS | EXCHGID4_FLAG_USE_PNFS_MDS))) { |
Weston Andros Adamson | a030889 | 2012-01-26 13:32:23 -0500 | [diff] [blame] | 112 | printk(KERN_ERR "NFS: %s: id %u cl_exchange_flags 0x%x\n", |
| 113 | __func__, id, server->nfs_client->cl_exchange_flags); |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 114 | goto out_no_driver; |
| 115 | } |
| 116 | ld_type = find_pnfs_driver(id); |
| 117 | if (!ld_type) { |
| 118 | request_module("%s-%u", LAYOUT_NFSV4_1_MODULE_PREFIX, id); |
| 119 | ld_type = find_pnfs_driver(id); |
| 120 | if (!ld_type) { |
| 121 | dprintk("%s: No pNFS module found for %u.\n", |
| 122 | __func__, id); |
| 123 | goto out_no_driver; |
| 124 | } |
| 125 | } |
| 126 | server->pnfs_curr_ld = ld_type; |
Benny Halevy | 738fd0f3 | 2011-07-30 20:52:36 -0400 | [diff] [blame] | 127 | if (ld_type->set_layoutdriver |
| 128 | && ld_type->set_layoutdriver(server, mntfh)) { |
Weston Andros Adamson | a030889 | 2012-01-26 13:32:23 -0500 | [diff] [blame] | 129 | printk(KERN_ERR "NFS: %s: Error initializing pNFS layout " |
| 130 | "driver %u.\n", __func__, id); |
Benny Halevy | 738fd0f3 | 2011-07-30 20:52:36 -0400 | [diff] [blame] | 131 | module_put(ld_type->owner); |
| 132 | goto out_no_driver; |
| 133 | } |
Trond Myklebust | 2a4c899 | 2012-06-14 13:08:38 -0400 | [diff] [blame] | 134 | /* Bump the MDS count */ |
| 135 | atomic_inc(&server->nfs_client->cl_mds_count); |
Christoph Hellwig | ea8eecd | 2011-03-01 01:34:21 +0000 | [diff] [blame] | 136 | |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 137 | dprintk("%s: pNFS module for %u set\n", __func__, id); |
| 138 | return; |
| 139 | |
| 140 | out_no_driver: |
| 141 | dprintk("%s: Using NFSv4 I/O\n", __func__); |
| 142 | server->pnfs_curr_ld = NULL; |
| 143 | } |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 144 | |
| 145 | int |
| 146 | pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *ld_type) |
| 147 | { |
| 148 | int status = -EINVAL; |
| 149 | struct pnfs_layoutdriver_type *tmp; |
| 150 | |
| 151 | if (ld_type->id == 0) { |
Weston Andros Adamson | a030889 | 2012-01-26 13:32:23 -0500 | [diff] [blame] | 152 | printk(KERN_ERR "NFS: %s id 0 is reserved\n", __func__); |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 153 | return status; |
| 154 | } |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 155 | if (!ld_type->alloc_lseg || !ld_type->free_lseg) { |
Weston Andros Adamson | a030889 | 2012-01-26 13:32:23 -0500 | [diff] [blame] | 156 | printk(KERN_ERR "NFS: %s Layout driver must provide " |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 157 | "alloc_lseg and free_lseg.\n", __func__); |
| 158 | return status; |
| 159 | } |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 160 | |
| 161 | spin_lock(&pnfs_spinlock); |
| 162 | tmp = find_pnfs_driver_locked(ld_type->id); |
| 163 | if (!tmp) { |
| 164 | list_add(&ld_type->pnfs_tblid, &pnfs_modules_tbl); |
| 165 | status = 0; |
| 166 | dprintk("%s Registering id:%u name:%s\n", __func__, ld_type->id, |
| 167 | ld_type->name); |
| 168 | } else { |
Weston Andros Adamson | a030889 | 2012-01-26 13:32:23 -0500 | [diff] [blame] | 169 | printk(KERN_ERR "NFS: %s Module with id %d already loaded!\n", |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 170 | __func__, ld_type->id); |
| 171 | } |
| 172 | spin_unlock(&pnfs_spinlock); |
| 173 | |
| 174 | return status; |
| 175 | } |
| 176 | EXPORT_SYMBOL_GPL(pnfs_register_layoutdriver); |
| 177 | |
| 178 | void |
| 179 | pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *ld_type) |
| 180 | { |
| 181 | dprintk("%s Deregistering id:%u\n", __func__, ld_type->id); |
| 182 | spin_lock(&pnfs_spinlock); |
| 183 | list_del(&ld_type->pnfs_tblid); |
| 184 | spin_unlock(&pnfs_spinlock); |
| 185 | } |
| 186 | EXPORT_SYMBOL_GPL(pnfs_unregister_layoutdriver); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 187 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 188 | /* |
| 189 | * pNFS client layout cache |
| 190 | */ |
| 191 | |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 192 | /* Need to hold i_lock if caller does not already hold reference */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 193 | void |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 194 | pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 195 | { |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 196 | atomic_inc(&lo->plh_refcount); |
| 197 | } |
| 198 | |
Benny Halevy | 636fb9c | 2011-05-22 19:51:33 +0300 | [diff] [blame] | 199 | static struct pnfs_layout_hdr * |
| 200 | pnfs_alloc_layout_hdr(struct inode *ino, gfp_t gfp_flags) |
| 201 | { |
| 202 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld; |
| 203 | return ld->alloc_layout_hdr ? ld->alloc_layout_hdr(ino, gfp_flags) : |
| 204 | kzalloc(sizeof(struct pnfs_layout_hdr), gfp_flags); |
| 205 | } |
| 206 | |
| 207 | static void |
| 208 | pnfs_free_layout_hdr(struct pnfs_layout_hdr *lo) |
| 209 | { |
| 210 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(lo->plh_inode)->pnfs_curr_ld; |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 211 | put_rpccred(lo->plh_lc_cred); |
Benny Halevy | 636fb9c | 2011-05-22 19:51:33 +0300 | [diff] [blame] | 212 | return ld->alloc_layout_hdr ? ld->free_layout_hdr(lo) : kfree(lo); |
| 213 | } |
| 214 | |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 215 | static void |
| 216 | destroy_layout_hdr(struct pnfs_layout_hdr *lo) |
| 217 | { |
| 218 | dprintk("%s: freeing layout cache %p\n", __func__, lo); |
| 219 | BUG_ON(!list_empty(&lo->plh_layouts)); |
| 220 | NFS_I(lo->plh_inode)->layout = NULL; |
Benny Halevy | 636fb9c | 2011-05-22 19:51:33 +0300 | [diff] [blame] | 221 | pnfs_free_layout_hdr(lo); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 222 | } |
| 223 | |
| 224 | static void |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 225 | pnfs_put_layout_hdr_locked(struct pnfs_layout_hdr *lo) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 226 | { |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 227 | if (atomic_dec_and_test(&lo->plh_refcount)) |
| 228 | destroy_layout_hdr(lo); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 229 | } |
| 230 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 231 | void |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 232 | pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 233 | { |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 234 | struct inode *inode = lo->plh_inode; |
| 235 | |
| 236 | if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) { |
| 237 | destroy_layout_hdr(lo); |
| 238 | spin_unlock(&inode->i_lock); |
| 239 | } |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 240 | } |
| 241 | |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 242 | static int |
| 243 | pnfs_iomode_to_fail_bit(u32 iomode) |
| 244 | { |
| 245 | return iomode == IOMODE_RW ? |
| 246 | NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; |
| 247 | } |
| 248 | |
| 249 | static void |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 250 | 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] | 251 | { |
Trond Myklebust | 25c7533 | 2012-09-18 17:01:12 -0400 | [diff] [blame] | 252 | lo->plh_retry_timestamp = jiffies; |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 253 | if (test_and_set_bit(fail_bit, &lo->plh_flags)) |
| 254 | atomic_inc(&lo->plh_refcount); |
| 255 | } |
| 256 | |
| 257 | static void |
| 258 | pnfs_layout_clear_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) |
| 259 | { |
| 260 | if (test_and_clear_bit(fail_bit, &lo->plh_flags)) |
| 261 | atomic_dec(&lo->plh_refcount); |
| 262 | } |
| 263 | |
| 264 | static void |
| 265 | pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode) |
| 266 | { |
| 267 | struct inode *inode = lo->plh_inode; |
Trond Myklebust | 115ce57 | 2012-09-20 21:19:43 -0400 | [diff] [blame^] | 268 | struct pnfs_layout_range range = { |
| 269 | .iomode = iomode, |
| 270 | .offset = 0, |
| 271 | .length = NFS4_MAX_UINT64, |
| 272 | }; |
| 273 | LIST_HEAD(head); |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 274 | |
| 275 | spin_lock(&inode->i_lock); |
| 276 | pnfs_layout_set_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); |
Trond Myklebust | 115ce57 | 2012-09-20 21:19:43 -0400 | [diff] [blame^] | 277 | pnfs_mark_matching_lsegs_invalid(lo, &head, &range); |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 278 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 115ce57 | 2012-09-20 21:19:43 -0400 | [diff] [blame^] | 279 | pnfs_free_lseg_list(&head); |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 280 | dprintk("%s Setting layout IOMODE_%s fail bit\n", __func__, |
| 281 | iomode == IOMODE_RW ? "RW" : "READ"); |
| 282 | } |
| 283 | |
| 284 | static bool |
| 285 | pnfs_layout_io_test_failed(struct pnfs_layout_hdr *lo, u32 iomode) |
| 286 | { |
Trond Myklebust | 25c7533 | 2012-09-18 17:01:12 -0400 | [diff] [blame] | 287 | unsigned long start, end; |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 288 | int fail_bit = pnfs_iomode_to_fail_bit(iomode); |
| 289 | |
| 290 | if (test_bit(fail_bit, &lo->plh_flags) == 0) |
Trond Myklebust | 25c7533 | 2012-09-18 17:01:12 -0400 | [diff] [blame] | 291 | return false; |
| 292 | end = jiffies; |
| 293 | start = end - PNFS_LAYOUTGET_RETRY_TIMEOUT; |
| 294 | if (!time_in_range(lo->plh_retry_timestamp, start, end)) { |
| 295 | /* It is time to retry the failed layoutgets */ |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 296 | pnfs_layout_clear_fail_bit(lo, fail_bit); |
Trond Myklebust | 25c7533 | 2012-09-18 17:01:12 -0400 | [diff] [blame] | 297 | return false; |
| 298 | } |
| 299 | return true; |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 300 | } |
| 301 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 302 | static void |
| 303 | init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg) |
| 304 | { |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 305 | INIT_LIST_HEAD(&lseg->pls_list); |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 306 | INIT_LIST_HEAD(&lseg->pls_lc_list); |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 307 | atomic_set(&lseg->pls_refcount, 1); |
| 308 | smp_mb(); |
| 309 | set_bit(NFS_LSEG_VALID, &lseg->pls_flags); |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 310 | lseg->pls_layout = lo; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 311 | } |
| 312 | |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 313 | static void free_lseg(struct pnfs_layout_segment *lseg) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 314 | { |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 315 | struct inode *ino = lseg->pls_layout->plh_inode; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 316 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 317 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 318 | /* Matched by pnfs_get_layout_hdr in pnfs_insert_layout */ |
| 319 | pnfs_put_layout_hdr(NFS_I(ino)->layout); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 320 | } |
| 321 | |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 322 | static void |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 323 | pnfs_put_lseg_common(struct pnfs_layout_segment *lseg) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 324 | { |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 325 | struct inode *inode = lseg->pls_layout->plh_inode; |
| 326 | |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 327 | WARN_ON(test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 328 | list_del_init(&lseg->pls_list); |
| 329 | if (list_empty(&lseg->pls_layout->plh_segs)) { |
| 330 | set_bit(NFS_LAYOUT_DESTROYED, &lseg->pls_layout->plh_flags); |
| 331 | /* Matched by initial refcount set in alloc_init_layout_hdr */ |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 332 | pnfs_put_layout_hdr_locked(lseg->pls_layout); |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 333 | } |
| 334 | rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq); |
| 335 | } |
| 336 | |
Fred Isaman | bae724e | 2011-03-01 01:34:15 +0000 | [diff] [blame] | 337 | void |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 338 | pnfs_put_lseg(struct pnfs_layout_segment *lseg) |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 339 | { |
| 340 | struct inode *inode; |
| 341 | |
| 342 | if (!lseg) |
| 343 | return; |
| 344 | |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 345 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, |
| 346 | atomic_read(&lseg->pls_refcount), |
| 347 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 348 | inode = lseg->pls_layout->plh_inode; |
| 349 | if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) { |
| 350 | LIST_HEAD(free_me); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 351 | |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 352 | pnfs_put_lseg_common(lseg); |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 353 | list_add(&lseg->pls_list, &free_me); |
| 354 | spin_unlock(&inode->i_lock); |
| 355 | pnfs_free_lseg_list(&free_me); |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 356 | } |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 357 | } |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 358 | EXPORT_SYMBOL_GPL(pnfs_put_lseg); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 359 | |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 360 | static inline u64 |
| 361 | end_offset(u64 start, u64 len) |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 362 | { |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 363 | u64 end; |
| 364 | |
| 365 | end = start + len; |
| 366 | return end >= start ? end : NFS4_MAX_UINT64; |
| 367 | } |
| 368 | |
| 369 | /* last octet in a range */ |
| 370 | static inline u64 |
| 371 | last_byte_offset(u64 start, u64 len) |
| 372 | { |
| 373 | u64 end; |
| 374 | |
| 375 | BUG_ON(!len); |
| 376 | end = start + len; |
| 377 | return end > start ? end - 1 : NFS4_MAX_UINT64; |
| 378 | } |
| 379 | |
| 380 | /* |
| 381 | * is l2 fully contained in l1? |
| 382 | * start1 end1 |
| 383 | * [----------------------------------) |
| 384 | * start2 end2 |
| 385 | * [----------------) |
| 386 | */ |
| 387 | static inline int |
| 388 | lo_seg_contained(struct pnfs_layout_range *l1, |
| 389 | struct pnfs_layout_range *l2) |
| 390 | { |
| 391 | u64 start1 = l1->offset; |
| 392 | u64 end1 = end_offset(start1, l1->length); |
| 393 | u64 start2 = l2->offset; |
| 394 | u64 end2 = end_offset(start2, l2->length); |
| 395 | |
| 396 | return (start1 <= start2) && (end1 >= end2); |
| 397 | } |
| 398 | |
| 399 | /* |
| 400 | * is l1 and l2 intersecting? |
| 401 | * start1 end1 |
| 402 | * [----------------------------------) |
| 403 | * start2 end2 |
| 404 | * [----------------) |
| 405 | */ |
| 406 | static inline int |
| 407 | lo_seg_intersecting(struct pnfs_layout_range *l1, |
| 408 | struct pnfs_layout_range *l2) |
| 409 | { |
| 410 | u64 start1 = l1->offset; |
| 411 | u64 end1 = end_offset(start1, l1->length); |
| 412 | u64 start2 = l2->offset; |
| 413 | u64 end2 = end_offset(start2, l2->length); |
| 414 | |
| 415 | return (end1 == NFS4_MAX_UINT64 || end1 > start2) && |
| 416 | (end2 == NFS4_MAX_UINT64 || end2 > start1); |
| 417 | } |
| 418 | |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 419 | static bool |
Benny Halevy | 778b550 | 2011-05-22 19:48:02 +0300 | [diff] [blame] | 420 | should_free_lseg(struct pnfs_layout_range *lseg_range, |
| 421 | struct pnfs_layout_range *recall_range) |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 422 | { |
Benny Halevy | 778b550 | 2011-05-22 19:48:02 +0300 | [diff] [blame] | 423 | return (recall_range->iomode == IOMODE_ANY || |
| 424 | lseg_range->iomode == recall_range->iomode) && |
| 425 | lo_seg_intersecting(lseg_range, recall_range); |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 426 | } |
| 427 | |
| 428 | /* Returns 1 if lseg is removed from list, 0 otherwise */ |
| 429 | static int mark_lseg_invalid(struct pnfs_layout_segment *lseg, |
| 430 | struct list_head *tmp_list) |
| 431 | { |
| 432 | int rv = 0; |
| 433 | |
| 434 | if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { |
| 435 | /* Remove the reference keeping the lseg in the |
| 436 | * list. It will now be removed when all |
| 437 | * outstanding io is finished. |
| 438 | */ |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 439 | dprintk("%s: lseg %p ref %d\n", __func__, lseg, |
| 440 | atomic_read(&lseg->pls_refcount)); |
| 441 | if (atomic_dec_and_test(&lseg->pls_refcount)) { |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 442 | pnfs_put_lseg_common(lseg); |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 443 | list_add(&lseg->pls_list, tmp_list); |
| 444 | rv = 1; |
| 445 | } |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 446 | } |
| 447 | return rv; |
| 448 | } |
| 449 | |
| 450 | /* Returns count of number of matching invalid lsegs remaining in list |
| 451 | * after call. |
| 452 | */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 453 | int |
Trond Myklebust | 49a8506 | 2012-09-18 20:43:31 -0400 | [diff] [blame] | 454 | pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 455 | struct list_head *tmp_list, |
Benny Halevy | 778b550 | 2011-05-22 19:48:02 +0300 | [diff] [blame] | 456 | struct pnfs_layout_range *recall_range) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 457 | { |
| 458 | struct pnfs_layout_segment *lseg, *next; |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 459 | int invalid = 0, removed = 0; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 460 | |
| 461 | dprintk("%s:Begin lo %p\n", __func__, lo); |
| 462 | |
Fred Isaman | 3851172 | 2011-02-03 18:28:50 +0000 | [diff] [blame] | 463 | if (list_empty(&lo->plh_segs)) { |
Andy Adamson | 2701d08 | 2012-05-24 13:13:24 -0400 | [diff] [blame] | 464 | /* Reset MDS Threshold I/O counters */ |
| 465 | NFS_I(lo->plh_inode)->write_io = 0; |
| 466 | NFS_I(lo->plh_inode)->read_io = 0; |
Fred Isaman | 3851172 | 2011-02-03 18:28:50 +0000 | [diff] [blame] | 467 | if (!test_and_set_bit(NFS_LAYOUT_DESTROYED, &lo->plh_flags)) |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 468 | pnfs_put_layout_hdr_locked(lo); |
Fred Isaman | 3851172 | 2011-02-03 18:28:50 +0000 | [diff] [blame] | 469 | return 0; |
| 470 | } |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 471 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
Benny Halevy | 778b550 | 2011-05-22 19:48:02 +0300 | [diff] [blame] | 472 | if (!recall_range || |
| 473 | should_free_lseg(&lseg->pls_range, recall_range)) { |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 474 | dprintk("%s: freeing lseg %p iomode %d " |
| 475 | "offset %llu length %llu\n", __func__, |
| 476 | lseg, lseg->pls_range.iomode, lseg->pls_range.offset, |
| 477 | lseg->pls_range.length); |
| 478 | invalid++; |
| 479 | removed += mark_lseg_invalid(lseg, tmp_list); |
| 480 | } |
| 481 | dprintk("%s:Return %i\n", __func__, invalid - removed); |
| 482 | return invalid - removed; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 483 | } |
| 484 | |
Fred Isaman | f49f9ba | 2011-02-03 18:28:52 +0000 | [diff] [blame] | 485 | /* note free_me must contain lsegs from a single layout_hdr */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 486 | void |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 487 | pnfs_free_lseg_list(struct list_head *free_me) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 488 | { |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 489 | struct pnfs_layout_segment *lseg, *tmp; |
Fred Isaman | f49f9ba | 2011-02-03 18:28:52 +0000 | [diff] [blame] | 490 | struct pnfs_layout_hdr *lo; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 491 | |
Fred Isaman | f49f9ba | 2011-02-03 18:28:52 +0000 | [diff] [blame] | 492 | if (list_empty(free_me)) |
| 493 | return; |
| 494 | |
| 495 | lo = list_first_entry(free_me, struct pnfs_layout_segment, |
| 496 | pls_list)->pls_layout; |
| 497 | |
| 498 | if (test_bit(NFS_LAYOUT_DESTROYED, &lo->plh_flags)) { |
| 499 | struct nfs_client *clp; |
| 500 | |
| 501 | clp = NFS_SERVER(lo->plh_inode)->nfs_client; |
| 502 | spin_lock(&clp->cl_lock); |
| 503 | list_del_init(&lo->plh_layouts); |
| 504 | spin_unlock(&clp->cl_lock); |
| 505 | } |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 506 | list_for_each_entry_safe(lseg, tmp, free_me, pls_list) { |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 507 | list_del(&lseg->pls_list); |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 508 | free_lseg(lseg); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 509 | } |
| 510 | } |
| 511 | |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 512 | void |
| 513 | pnfs_destroy_layout(struct nfs_inode *nfsi) |
| 514 | { |
| 515 | struct pnfs_layout_hdr *lo; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 516 | LIST_HEAD(tmp_list); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 517 | |
| 518 | spin_lock(&nfsi->vfs_inode.i_lock); |
| 519 | lo = nfsi->layout; |
| 520 | if (lo) { |
Fred Isaman | 3851172 | 2011-02-03 18:28:50 +0000 | [diff] [blame] | 521 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ |
Trond Myklebust | 49a8506 | 2012-09-18 20:43:31 -0400 | [diff] [blame] | 522 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 523 | pnfs_get_layout_hdr(lo); |
| 524 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED); |
| 525 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED); |
| 526 | spin_unlock(&nfsi->vfs_inode.i_lock); |
| 527 | pnfs_free_lseg_list(&tmp_list); |
| 528 | pnfs_put_layout_hdr(lo); |
| 529 | } else |
| 530 | spin_unlock(&nfsi->vfs_inode.i_lock); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 531 | } |
Andy Adamson | 041245c | 2012-04-27 17:53:53 -0400 | [diff] [blame] | 532 | EXPORT_SYMBOL_GPL(pnfs_destroy_layout); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 533 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 534 | /* |
| 535 | * Called by the state manger to remove all layouts established under an |
| 536 | * expired lease. |
| 537 | */ |
| 538 | void |
| 539 | pnfs_destroy_all_layouts(struct nfs_client *clp) |
| 540 | { |
Weston Andros Adamson | 6382a44 | 2011-06-01 16:44:44 -0400 | [diff] [blame] | 541 | struct nfs_server *server; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 542 | struct pnfs_layout_hdr *lo; |
| 543 | LIST_HEAD(tmp_list); |
| 544 | |
Andy Adamson | c47abcf | 2011-06-15 17:52:40 -0400 | [diff] [blame] | 545 | nfs4_deviceid_mark_client_invalid(clp); |
| 546 | nfs4_deviceid_purge_client(clp); |
| 547 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 548 | spin_lock(&clp->cl_lock); |
Weston Andros Adamson | 6382a44 | 2011-06-01 16:44:44 -0400 | [diff] [blame] | 549 | rcu_read_lock(); |
| 550 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 551 | if (!list_empty(&server->layouts)) |
| 552 | list_splice_init(&server->layouts, &tmp_list); |
| 553 | } |
| 554 | rcu_read_unlock(); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 555 | spin_unlock(&clp->cl_lock); |
| 556 | |
| 557 | while (!list_empty(&tmp_list)) { |
| 558 | lo = list_entry(tmp_list.next, struct pnfs_layout_hdr, |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 559 | plh_layouts); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 560 | dprintk("%s freeing layout for inode %lu\n", __func__, |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 561 | lo->plh_inode->i_ino); |
Andy Adamson | 2887fe4 | 2011-05-11 01:19:58 -0400 | [diff] [blame] | 562 | list_del_init(&lo->plh_layouts); |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 563 | pnfs_destroy_layout(NFS_I(lo->plh_inode)); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 564 | } |
| 565 | } |
| 566 | |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 567 | /* update lo->plh_stateid with new if is more recent */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 568 | void |
| 569 | pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new, |
| 570 | bool update_barrier) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 571 | { |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 572 | u32 oldseq, newseq; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 573 | |
Trond Myklebust | 2d2f24a | 2012-03-04 18:13:57 -0500 | [diff] [blame] | 574 | oldseq = be32_to_cpu(lo->plh_stateid.seqid); |
| 575 | newseq = be32_to_cpu(new->seqid); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 576 | if ((int)(newseq - oldseq) > 0) { |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 577 | nfs4_stateid_copy(&lo->plh_stateid, new); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 578 | if (update_barrier) { |
Trond Myklebust | 2d2f24a | 2012-03-04 18:13:57 -0500 | [diff] [blame] | 579 | u32 new_barrier = be32_to_cpu(new->seqid); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 580 | |
| 581 | if ((int)(new_barrier - lo->plh_barrier)) |
| 582 | lo->plh_barrier = new_barrier; |
| 583 | } else { |
| 584 | /* Because of wraparound, we want to keep the barrier |
| 585 | * "close" to the current seqids. It needs to be |
| 586 | * within 2**31 to count as "behind", so if it |
| 587 | * gets too near that limit, give us a litle leeway |
| 588 | * and bring it to within 2**30. |
| 589 | * NOTE - and yes, this is all unsigned arithmetic. |
| 590 | */ |
| 591 | if (unlikely((newseq - lo->plh_barrier) > (3 << 29))) |
| 592 | lo->plh_barrier = newseq - (1 << 30); |
| 593 | } |
| 594 | } |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 595 | } |
| 596 | |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 597 | /* lget is set to 1 if called from inside send_layoutget call chain */ |
| 598 | static bool |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 599 | pnfs_layoutgets_blocked(struct pnfs_layout_hdr *lo, nfs4_stateid *stateid, |
| 600 | int lget) |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 601 | { |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 602 | if ((stateid) && |
Trond Myklebust | 2d2f24a | 2012-03-04 18:13:57 -0500 | [diff] [blame] | 603 | (int)(lo->plh_barrier - be32_to_cpu(stateid->seqid)) >= 0) |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 604 | return true; |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 605 | return lo->plh_block_lgets || |
Fred Isaman | 3851172 | 2011-02-03 18:28:50 +0000 | [diff] [blame] | 606 | test_bit(NFS_LAYOUT_DESTROYED, &lo->plh_flags) || |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 607 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 608 | (list_empty(&lo->plh_segs) && |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 609 | (atomic_read(&lo->plh_outstanding) > lget)); |
| 610 | } |
| 611 | |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 612 | int |
| 613 | pnfs_choose_layoutget_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo, |
| 614 | struct nfs4_state *open_state) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 615 | { |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 616 | int status = 0; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 617 | |
| 618 | dprintk("--> %s\n", __func__); |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 619 | spin_lock(&lo->plh_inode->i_lock); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 620 | if (pnfs_layoutgets_blocked(lo, NULL, 1)) { |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 621 | status = -EAGAIN; |
| 622 | } else if (list_empty(&lo->plh_segs)) { |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 623 | int seq; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 624 | |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 625 | do { |
| 626 | seq = read_seqbegin(&open_state->seqlock); |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 627 | nfs4_stateid_copy(dst, &open_state->stateid); |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 628 | } while (read_seqretry(&open_state->seqlock, seq)); |
| 629 | } else |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 630 | nfs4_stateid_copy(dst, &lo->plh_stateid); |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 631 | spin_unlock(&lo->plh_inode->i_lock); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 632 | dprintk("<-- %s\n", __func__); |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 633 | return status; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 634 | } |
| 635 | |
| 636 | /* |
| 637 | * Get layout from server. |
| 638 | * for now, assume that whole file layouts are requested. |
| 639 | * arg->offset: 0 |
| 640 | * arg->length: all ones |
| 641 | */ |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 642 | static struct pnfs_layout_segment * |
| 643 | send_layoutget(struct pnfs_layout_hdr *lo, |
| 644 | struct nfs_open_context *ctx, |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 645 | struct pnfs_layout_range *range, |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 646 | gfp_t gfp_flags) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 647 | { |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 648 | struct inode *ino = lo->plh_inode; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 649 | struct nfs_server *server = NFS_SERVER(ino); |
| 650 | struct nfs4_layoutget *lgp; |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 651 | struct pnfs_layout_segment *lseg; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 652 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 653 | dprintk("--> %s\n", __func__); |
| 654 | |
| 655 | BUG_ON(ctx == NULL); |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 656 | lgp = kzalloc(sizeof(*lgp), gfp_flags); |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 657 | if (lgp == NULL) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 658 | return NULL; |
Weston Andros Adamson | 35124a0 | 2011-03-24 16:48:21 -0400 | [diff] [blame] | 659 | |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 660 | lgp->args.minlength = PAGE_CACHE_SIZE; |
| 661 | if (lgp->args.minlength > range->length) |
| 662 | lgp->args.minlength = range->length; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 663 | lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE; |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 664 | lgp->args.range = *range; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 665 | lgp->args.type = server->pnfs_curr_ld->id; |
| 666 | lgp->args.inode = ino; |
| 667 | lgp->args.ctx = get_nfs_open_context(ctx); |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 668 | lgp->gfp_flags = gfp_flags; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 669 | |
| 670 | /* Synchronously retrieve layout information from server and |
| 671 | * store in lseg. |
| 672 | */ |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 673 | lseg = nfs4_proc_layoutget(lgp, gfp_flags); |
| 674 | if (IS_ERR(lseg)) { |
| 675 | switch (PTR_ERR(lseg)) { |
| 676 | case -ENOMEM: |
| 677 | case -ERESTARTSYS: |
| 678 | break; |
| 679 | default: |
| 680 | /* remember that LAYOUTGET failed and suspend trying */ |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 681 | pnfs_layout_io_set_failed(lo, range->iomode); |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 682 | } |
| 683 | return NULL; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 684 | } |
Weston Andros Adamson | 35124a0 | 2011-03-24 16:48:21 -0400 | [diff] [blame] | 685 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 686 | return lseg; |
| 687 | } |
| 688 | |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 689 | /* |
| 690 | * Initiates a LAYOUTRETURN(FILE), and removes the pnfs_layout_hdr |
| 691 | * when the layout segment list is empty. |
| 692 | * |
| 693 | * Note that a pnfs_layout_hdr can exist with an empty layout segment |
| 694 | * list when LAYOUTGET has failed, or when LAYOUTGET succeeded, but the |
| 695 | * deviceid is marked invalid. |
| 696 | */ |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 697 | int |
| 698 | _pnfs_return_layout(struct inode *ino) |
| 699 | { |
| 700 | struct pnfs_layout_hdr *lo = NULL; |
| 701 | struct nfs_inode *nfsi = NFS_I(ino); |
| 702 | LIST_HEAD(tmp_list); |
| 703 | struct nfs4_layoutreturn *lrp; |
| 704 | nfs4_stateid stateid; |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 705 | int status = 0, empty; |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 706 | |
Andy Adamson | 366d505 | 2012-06-20 15:03:33 -0400 | [diff] [blame] | 707 | dprintk("NFS: %s for inode %lu\n", __func__, ino->i_ino); |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 708 | |
| 709 | spin_lock(&ino->i_lock); |
| 710 | lo = nfsi->layout; |
Andy Adamson | 366d505 | 2012-06-20 15:03:33 -0400 | [diff] [blame] | 711 | if (!lo || pnfs_test_layout_returned(lo)) { |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 712 | spin_unlock(&ino->i_lock); |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 713 | dprintk("NFS: %s no layout to return\n", __func__); |
| 714 | goto out; |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 715 | } |
| 716 | stateid = nfsi->layout->plh_stateid; |
| 717 | /* Reference matched in nfs4_layoutreturn_release */ |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 718 | pnfs_get_layout_hdr(lo); |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 719 | empty = list_empty(&lo->plh_segs); |
Trond Myklebust | 49a8506 | 2012-09-18 20:43:31 -0400 | [diff] [blame] | 720 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 721 | /* Don't send a LAYOUTRETURN if list was initially empty */ |
| 722 | if (empty) { |
| 723 | spin_unlock(&ino->i_lock); |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 724 | pnfs_put_layout_hdr(lo); |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 725 | dprintk("NFS: %s no layout segments to return\n", __func__); |
| 726 | goto out; |
| 727 | } |
Fred Isaman | ea0ded7 | 2011-06-15 12:31:02 -0400 | [diff] [blame] | 728 | lo->plh_block_lgets++; |
Andy Adamson | 366d505 | 2012-06-20 15:03:33 -0400 | [diff] [blame] | 729 | pnfs_mark_layout_returned(lo); |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 730 | spin_unlock(&ino->i_lock); |
| 731 | pnfs_free_lseg_list(&tmp_list); |
| 732 | |
| 733 | WARN_ON(test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)); |
| 734 | |
| 735 | lrp = kzalloc(sizeof(*lrp), GFP_KERNEL); |
| 736 | if (unlikely(lrp == NULL)) { |
| 737 | status = -ENOMEM; |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 738 | pnfs_layout_io_set_failed(lo, IOMODE_RW); |
| 739 | pnfs_layout_io_set_failed(lo, IOMODE_READ); |
Andy Adamson | 366d505 | 2012-06-20 15:03:33 -0400 | [diff] [blame] | 740 | pnfs_clear_layout_returned(lo); |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 741 | pnfs_put_layout_hdr(lo); |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 742 | goto out; |
| 743 | } |
| 744 | |
| 745 | lrp->args.stateid = stateid; |
| 746 | lrp->args.layout_type = NFS_SERVER(ino)->pnfs_curr_ld->id; |
| 747 | lrp->args.inode = ino; |
Trond Myklebust | a56aaa0 | 2011-06-15 11:59:10 -0400 | [diff] [blame] | 748 | lrp->args.layout = lo; |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 749 | lrp->clp = NFS_SERVER(ino)->nfs_client; |
| 750 | |
| 751 | status = nfs4_proc_layoutreturn(lrp); |
| 752 | out: |
| 753 | dprintk("<-- %s status: %d\n", __func__, status); |
| 754 | return status; |
| 755 | } |
Andy Adamson | 0a57cda | 2012-04-27 17:53:50 -0400 | [diff] [blame] | 756 | EXPORT_SYMBOL_GPL(_pnfs_return_layout); |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 757 | |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 758 | bool pnfs_roc(struct inode *ino) |
| 759 | { |
| 760 | struct pnfs_layout_hdr *lo; |
| 761 | struct pnfs_layout_segment *lseg, *tmp; |
| 762 | LIST_HEAD(tmp_list); |
| 763 | bool found = false; |
| 764 | |
| 765 | spin_lock(&ino->i_lock); |
| 766 | lo = NFS_I(ino)->layout; |
| 767 | if (!lo || !test_and_clear_bit(NFS_LAYOUT_ROC, &lo->plh_flags) || |
| 768 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) |
| 769 | goto out_nolayout; |
| 770 | list_for_each_entry_safe(lseg, tmp, &lo->plh_segs, pls_list) |
| 771 | if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { |
| 772 | mark_lseg_invalid(lseg, &tmp_list); |
| 773 | found = true; |
| 774 | } |
| 775 | if (!found) |
| 776 | goto out_nolayout; |
| 777 | lo->plh_block_lgets++; |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 778 | pnfs_get_layout_hdr(lo); /* matched in pnfs_roc_release */ |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 779 | spin_unlock(&ino->i_lock); |
| 780 | pnfs_free_lseg_list(&tmp_list); |
| 781 | return true; |
| 782 | |
| 783 | out_nolayout: |
| 784 | spin_unlock(&ino->i_lock); |
| 785 | return false; |
| 786 | } |
| 787 | |
| 788 | void pnfs_roc_release(struct inode *ino) |
| 789 | { |
| 790 | struct pnfs_layout_hdr *lo; |
| 791 | |
| 792 | spin_lock(&ino->i_lock); |
| 793 | lo = NFS_I(ino)->layout; |
| 794 | lo->plh_block_lgets--; |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 795 | pnfs_put_layout_hdr_locked(lo); |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 796 | spin_unlock(&ino->i_lock); |
| 797 | } |
| 798 | |
| 799 | void pnfs_roc_set_barrier(struct inode *ino, u32 barrier) |
| 800 | { |
| 801 | struct pnfs_layout_hdr *lo; |
| 802 | |
| 803 | spin_lock(&ino->i_lock); |
| 804 | lo = NFS_I(ino)->layout; |
| 805 | if ((int)(barrier - lo->plh_barrier) > 0) |
| 806 | lo->plh_barrier = barrier; |
| 807 | spin_unlock(&ino->i_lock); |
| 808 | } |
| 809 | |
| 810 | bool pnfs_roc_drain(struct inode *ino, u32 *barrier) |
| 811 | { |
| 812 | struct nfs_inode *nfsi = NFS_I(ino); |
| 813 | struct pnfs_layout_segment *lseg; |
| 814 | bool found = false; |
| 815 | |
| 816 | spin_lock(&ino->i_lock); |
| 817 | list_for_each_entry(lseg, &nfsi->layout->plh_segs, pls_list) |
| 818 | if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { |
| 819 | found = true; |
| 820 | break; |
| 821 | } |
| 822 | if (!found) { |
| 823 | struct pnfs_layout_hdr *lo = nfsi->layout; |
Trond Myklebust | 2d2f24a | 2012-03-04 18:13:57 -0500 | [diff] [blame] | 824 | u32 current_seqid = be32_to_cpu(lo->plh_stateid.seqid); |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 825 | |
| 826 | /* Since close does not return a layout stateid for use as |
| 827 | * a barrier, we choose the worst-case barrier. |
| 828 | */ |
| 829 | *barrier = current_seqid + atomic_read(&lo->plh_outstanding); |
| 830 | } |
| 831 | spin_unlock(&ino->i_lock); |
| 832 | return found; |
| 833 | } |
| 834 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 835 | /* |
| 836 | * Compare two layout segments for sorting into layout cache. |
| 837 | * We want to preferentially return RW over RO layouts, so ensure those |
| 838 | * are seen first. |
| 839 | */ |
| 840 | static s64 |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 841 | cmp_layout(struct pnfs_layout_range *l1, |
| 842 | struct pnfs_layout_range *l2) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 843 | { |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 844 | s64 d; |
| 845 | |
| 846 | /* high offset > low offset */ |
| 847 | d = l1->offset - l2->offset; |
| 848 | if (d) |
| 849 | return d; |
| 850 | |
| 851 | /* short length > long length */ |
| 852 | d = l2->length - l1->length; |
| 853 | if (d) |
| 854 | return d; |
| 855 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 856 | /* read > read/write */ |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 857 | return (int)(l1->iomode == IOMODE_READ) - (int)(l2->iomode == IOMODE_READ); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 858 | } |
| 859 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 860 | static void |
| 861 | pnfs_insert_layout(struct pnfs_layout_hdr *lo, |
| 862 | struct pnfs_layout_segment *lseg) |
| 863 | { |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 864 | struct pnfs_layout_segment *lp; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 865 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 866 | dprintk("%s:Begin\n", __func__); |
| 867 | |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 868 | assert_spin_locked(&lo->plh_inode->i_lock); |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 869 | list_for_each_entry(lp, &lo->plh_segs, pls_list) { |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 870 | if (cmp_layout(&lseg->pls_range, &lp->pls_range) > 0) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 871 | continue; |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 872 | list_add_tail(&lseg->pls_list, &lp->pls_list); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 873 | dprintk("%s: inserted lseg %p " |
| 874 | "iomode %d offset %llu length %llu before " |
| 875 | "lp %p iomode %d offset %llu length %llu\n", |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 876 | __func__, lseg, lseg->pls_range.iomode, |
| 877 | lseg->pls_range.offset, lseg->pls_range.length, |
| 878 | lp, lp->pls_range.iomode, lp->pls_range.offset, |
| 879 | lp->pls_range.length); |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 880 | goto out; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 881 | } |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 882 | list_add_tail(&lseg->pls_list, &lo->plh_segs); |
| 883 | dprintk("%s: inserted lseg %p " |
| 884 | "iomode %d offset %llu length %llu at tail\n", |
| 885 | __func__, lseg, lseg->pls_range.iomode, |
| 886 | lseg->pls_range.offset, lseg->pls_range.length); |
| 887 | out: |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 888 | pnfs_get_layout_hdr(lo); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 889 | |
| 890 | dprintk("%s:Return\n", __func__); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 891 | } |
| 892 | |
| 893 | static struct pnfs_layout_hdr * |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 894 | alloc_init_layout_hdr(struct inode *ino, |
| 895 | struct nfs_open_context *ctx, |
| 896 | gfp_t gfp_flags) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 897 | { |
| 898 | struct pnfs_layout_hdr *lo; |
| 899 | |
Benny Halevy | 636fb9c | 2011-05-22 19:51:33 +0300 | [diff] [blame] | 900 | lo = pnfs_alloc_layout_hdr(ino, gfp_flags); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 901 | if (!lo) |
| 902 | return NULL; |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 903 | atomic_set(&lo->plh_refcount, 1); |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 904 | INIT_LIST_HEAD(&lo->plh_layouts); |
| 905 | INIT_LIST_HEAD(&lo->plh_segs); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 906 | INIT_LIST_HEAD(&lo->plh_bulk_recall); |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 907 | lo->plh_inode = ino; |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 908 | lo->plh_lc_cred = get_rpccred(ctx->state->owner->so_cred); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 909 | return lo; |
| 910 | } |
| 911 | |
| 912 | static struct pnfs_layout_hdr * |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 913 | pnfs_find_alloc_layout(struct inode *ino, |
| 914 | struct nfs_open_context *ctx, |
| 915 | gfp_t gfp_flags) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 916 | { |
| 917 | struct nfs_inode *nfsi = NFS_I(ino); |
| 918 | struct pnfs_layout_hdr *new = NULL; |
| 919 | |
| 920 | dprintk("%s Begin ino=%p layout=%p\n", __func__, ino, nfsi->layout); |
| 921 | |
| 922 | assert_spin_locked(&ino->i_lock); |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 923 | if (nfsi->layout) { |
| 924 | if (test_bit(NFS_LAYOUT_DESTROYED, &nfsi->layout->plh_flags)) |
| 925 | return NULL; |
| 926 | else |
| 927 | return nfsi->layout; |
| 928 | } |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 929 | spin_unlock(&ino->i_lock); |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 930 | new = alloc_init_layout_hdr(ino, ctx, gfp_flags); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 931 | spin_lock(&ino->i_lock); |
| 932 | |
| 933 | if (likely(nfsi->layout == NULL)) /* Won the race? */ |
| 934 | nfsi->layout = new; |
| 935 | else |
Benny Halevy | 636fb9c | 2011-05-22 19:51:33 +0300 | [diff] [blame] | 936 | pnfs_free_layout_hdr(new); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 937 | return nfsi->layout; |
| 938 | } |
| 939 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 940 | /* |
| 941 | * iomode matching rules: |
| 942 | * iomode lseg match |
| 943 | * ----- ----- ----- |
| 944 | * ANY READ true |
| 945 | * ANY RW true |
| 946 | * RW READ false |
| 947 | * RW RW true |
| 948 | * READ READ true |
| 949 | * READ RW true |
| 950 | */ |
| 951 | static int |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 952 | is_matching_lseg(struct pnfs_layout_range *ls_range, |
| 953 | struct pnfs_layout_range *range) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 954 | { |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 955 | struct pnfs_layout_range range1; |
| 956 | |
| 957 | if ((range->iomode == IOMODE_RW && |
| 958 | ls_range->iomode != IOMODE_RW) || |
| 959 | !lo_seg_intersecting(ls_range, range)) |
| 960 | return 0; |
| 961 | |
| 962 | /* range1 covers only the first byte in the range */ |
| 963 | range1 = *range; |
| 964 | range1.length = 1; |
| 965 | return lo_seg_contained(ls_range, &range1); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 966 | } |
| 967 | |
| 968 | /* |
| 969 | * lookup range in layout |
| 970 | */ |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 971 | static struct pnfs_layout_segment * |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 972 | pnfs_find_lseg(struct pnfs_layout_hdr *lo, |
| 973 | struct pnfs_layout_range *range) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 974 | { |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 975 | struct pnfs_layout_segment *lseg, *ret = NULL; |
| 976 | |
| 977 | dprintk("%s:Begin\n", __func__); |
| 978 | |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 979 | assert_spin_locked(&lo->plh_inode->i_lock); |
| 980 | list_for_each_entry(lseg, &lo->plh_segs, pls_list) { |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 981 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) && |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 982 | is_matching_lseg(&lseg->pls_range, range)) { |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 983 | ret = pnfs_get_lseg(lseg); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 984 | break; |
| 985 | } |
Benny Halevy | d771e3a | 2011-06-14 16:30:16 -0400 | [diff] [blame] | 986 | if (lseg->pls_range.offset > range->offset) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 987 | break; |
| 988 | } |
| 989 | |
| 990 | dprintk("%s:Return lseg %p ref %d\n", |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 991 | __func__, ret, ret ? atomic_read(&ret->pls_refcount) : 0); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 992 | return ret; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 993 | } |
| 994 | |
| 995 | /* |
Andy Adamson | d23d61c | 2012-05-23 05:02:37 -0400 | [diff] [blame] | 996 | * Use mdsthreshold hints set at each OPEN to determine if I/O should go |
| 997 | * to the MDS or over pNFS |
| 998 | * |
| 999 | * The nfs_inode read_io and write_io fields are cumulative counters reset |
| 1000 | * when there are no layout segments. Note that in pnfs_update_layout iomode |
| 1001 | * is set to IOMODE_READ for a READ request, and set to IOMODE_RW for a |
| 1002 | * WRITE request. |
| 1003 | * |
| 1004 | * A return of true means use MDS I/O. |
| 1005 | * |
| 1006 | * From rfc 5661: |
| 1007 | * If a file's size is smaller than the file size threshold, data accesses |
| 1008 | * SHOULD be sent to the metadata server. If an I/O request has a length that |
| 1009 | * is below the I/O size threshold, the I/O SHOULD be sent to the metadata |
| 1010 | * server. If both file size and I/O size are provided, the client SHOULD |
| 1011 | * reach or exceed both thresholds before sending its read or write |
| 1012 | * requests to the data server. |
| 1013 | */ |
| 1014 | static bool pnfs_within_mdsthreshold(struct nfs_open_context *ctx, |
| 1015 | struct inode *ino, int iomode) |
| 1016 | { |
| 1017 | struct nfs4_threshold *t = ctx->mdsthreshold; |
| 1018 | struct nfs_inode *nfsi = NFS_I(ino); |
| 1019 | loff_t fsize = i_size_read(ino); |
| 1020 | bool size = false, size_set = false, io = false, io_set = false, ret = false; |
| 1021 | |
| 1022 | if (t == NULL) |
| 1023 | return ret; |
| 1024 | |
| 1025 | dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n", |
| 1026 | __func__, t->bm, t->rd_sz, t->wr_sz, t->rd_io_sz, t->wr_io_sz); |
| 1027 | |
| 1028 | switch (iomode) { |
| 1029 | case IOMODE_READ: |
| 1030 | if (t->bm & THRESHOLD_RD) { |
| 1031 | dprintk("%s fsize %llu\n", __func__, fsize); |
| 1032 | size_set = true; |
| 1033 | if (fsize < t->rd_sz) |
| 1034 | size = true; |
| 1035 | } |
| 1036 | if (t->bm & THRESHOLD_RD_IO) { |
| 1037 | dprintk("%s nfsi->read_io %llu\n", __func__, |
| 1038 | nfsi->read_io); |
| 1039 | io_set = true; |
| 1040 | if (nfsi->read_io < t->rd_io_sz) |
| 1041 | io = true; |
| 1042 | } |
| 1043 | break; |
| 1044 | case IOMODE_RW: |
| 1045 | if (t->bm & THRESHOLD_WR) { |
| 1046 | dprintk("%s fsize %llu\n", __func__, fsize); |
| 1047 | size_set = true; |
| 1048 | if (fsize < t->wr_sz) |
| 1049 | size = true; |
| 1050 | } |
| 1051 | if (t->bm & THRESHOLD_WR_IO) { |
| 1052 | dprintk("%s nfsi->write_io %llu\n", __func__, |
| 1053 | nfsi->write_io); |
| 1054 | io_set = true; |
| 1055 | if (nfsi->write_io < t->wr_io_sz) |
| 1056 | io = true; |
| 1057 | } |
| 1058 | break; |
| 1059 | } |
| 1060 | if (size_set && io_set) { |
| 1061 | if (size && io) |
| 1062 | ret = true; |
| 1063 | } else if (size || io) |
| 1064 | ret = true; |
| 1065 | |
| 1066 | dprintk("<-- %s size %d io %d ret %d\n", __func__, size, io, ret); |
| 1067 | return ret; |
| 1068 | } |
| 1069 | |
| 1070 | /* |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1071 | * Layout segment is retreived from the server if not cached. |
| 1072 | * The appropriate layout segment is referenced and returned to the caller. |
| 1073 | */ |
Andy Adamson | 7c24d94 | 2011-06-13 18:22:38 -0400 | [diff] [blame] | 1074 | struct pnfs_layout_segment * |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1075 | pnfs_update_layout(struct inode *ino, |
| 1076 | struct nfs_open_context *ctx, |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1077 | loff_t pos, |
| 1078 | u64 count, |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 1079 | enum pnfs_iomode iomode, |
| 1080 | gfp_t gfp_flags) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1081 | { |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1082 | struct pnfs_layout_range arg = { |
| 1083 | .iomode = iomode, |
| 1084 | .offset = pos, |
| 1085 | .length = count, |
| 1086 | }; |
Benny Halevy | 707ed5f | 2011-05-22 19:47:46 +0300 | [diff] [blame] | 1087 | unsigned pg_offset; |
Weston Andros Adamson | 6382a44 | 2011-06-01 16:44:44 -0400 | [diff] [blame] | 1088 | struct nfs_server *server = NFS_SERVER(ino); |
| 1089 | struct nfs_client *clp = server->nfs_client; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1090 | struct pnfs_layout_hdr *lo; |
| 1091 | struct pnfs_layout_segment *lseg = NULL; |
Fred Isaman | f49f9ba | 2011-02-03 18:28:52 +0000 | [diff] [blame] | 1092 | bool first = false; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1093 | |
| 1094 | if (!pnfs_enabled_sb(NFS_SERVER(ino))) |
Trond Myklebust | f86bbcf | 2012-09-26 11:21:40 -0400 | [diff] [blame] | 1095 | goto out; |
Andy Adamson | d23d61c | 2012-05-23 05:02:37 -0400 | [diff] [blame] | 1096 | |
| 1097 | if (pnfs_within_mdsthreshold(ctx, ino, iomode)) |
Trond Myklebust | f86bbcf | 2012-09-26 11:21:40 -0400 | [diff] [blame] | 1098 | goto out; |
Andy Adamson | d23d61c | 2012-05-23 05:02:37 -0400 | [diff] [blame] | 1099 | |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1100 | spin_lock(&ino->i_lock); |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 1101 | lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags); |
Trond Myklebust | 830ffb5 | 2012-09-20 21:25:19 -0400 | [diff] [blame] | 1102 | if (lo == NULL) { |
| 1103 | spin_unlock(&ino->i_lock); |
| 1104 | goto out; |
| 1105 | } |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1106 | |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 1107 | /* Do we even need to bother with this? */ |
Trond Myklebust | a59c30a | 2012-03-01 11:17:47 -0500 | [diff] [blame] | 1108 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 1109 | dprintk("%s matches recall, use MDS\n", __func__); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1110 | goto out_unlock; |
| 1111 | } |
| 1112 | |
| 1113 | /* if LAYOUTGET already failed once we don't try again */ |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 1114 | if (pnfs_layout_io_test_failed(lo, iomode)) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1115 | goto out_unlock; |
| 1116 | |
Andy Adamson | 568e8c4 | 2011-03-01 01:34:22 +0000 | [diff] [blame] | 1117 | /* Check to see if the layout for the given range already exists */ |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1118 | lseg = pnfs_find_lseg(lo, &arg); |
Andy Adamson | 568e8c4 | 2011-03-01 01:34:22 +0000 | [diff] [blame] | 1119 | if (lseg) |
| 1120 | goto out_unlock; |
| 1121 | |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 1122 | if (pnfs_layoutgets_blocked(lo, NULL, 0)) |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 1123 | goto out_unlock; |
| 1124 | atomic_inc(&lo->plh_outstanding); |
| 1125 | |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 1126 | pnfs_get_layout_hdr(lo); |
Fred Isaman | f49f9ba | 2011-02-03 18:28:52 +0000 | [diff] [blame] | 1127 | if (list_empty(&lo->plh_segs)) |
| 1128 | first = true; |
Andy Adamson | 366d505 | 2012-06-20 15:03:33 -0400 | [diff] [blame] | 1129 | |
| 1130 | /* Enable LAYOUTRETURNs */ |
| 1131 | pnfs_clear_layout_returned(lo); |
| 1132 | |
Fred Isaman | f49f9ba | 2011-02-03 18:28:52 +0000 | [diff] [blame] | 1133 | spin_unlock(&ino->i_lock); |
| 1134 | if (first) { |
Fred Isaman | 2130ff6 | 2011-01-06 11:36:26 +0000 | [diff] [blame] | 1135 | /* The lo must be on the clp list if there is any |
| 1136 | * chance of a CB_LAYOUTRECALL(FILE) coming in. |
| 1137 | */ |
| 1138 | spin_lock(&clp->cl_lock); |
| 1139 | BUG_ON(!list_empty(&lo->plh_layouts)); |
Weston Andros Adamson | 6382a44 | 2011-06-01 16:44:44 -0400 | [diff] [blame] | 1140 | list_add_tail(&lo->plh_layouts, &server->layouts); |
Fred Isaman | 2130ff6 | 2011-01-06 11:36:26 +0000 | [diff] [blame] | 1141 | spin_unlock(&clp->cl_lock); |
| 1142 | } |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1143 | |
Benny Halevy | 707ed5f | 2011-05-22 19:47:46 +0300 | [diff] [blame] | 1144 | pg_offset = arg.offset & ~PAGE_CACHE_MASK; |
| 1145 | if (pg_offset) { |
| 1146 | arg.offset -= pg_offset; |
| 1147 | arg.length += pg_offset; |
| 1148 | } |
Andy Adamson | 7c24d94 | 2011-06-13 18:22:38 -0400 | [diff] [blame] | 1149 | if (arg.length != NFS4_MAX_UINT64) |
| 1150 | arg.length = PAGE_CACHE_ALIGN(arg.length); |
Benny Halevy | 707ed5f | 2011-05-22 19:47:46 +0300 | [diff] [blame] | 1151 | |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1152 | lseg = send_layoutget(lo, ctx, &arg, gfp_flags); |
Fred Isaman | f49f9ba | 2011-02-03 18:28:52 +0000 | [diff] [blame] | 1153 | if (!lseg && first) { |
| 1154 | spin_lock(&clp->cl_lock); |
| 1155 | list_del_init(&lo->plh_layouts); |
| 1156 | spin_unlock(&clp->cl_lock); |
Fred Isaman | 2130ff6 | 2011-01-06 11:36:26 +0000 | [diff] [blame] | 1157 | } |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 1158 | atomic_dec(&lo->plh_outstanding); |
Trond Myklebust | 830ffb5 | 2012-09-20 21:25:19 -0400 | [diff] [blame] | 1159 | out_put_layout_hdr: |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 1160 | pnfs_put_layout_hdr(lo); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1161 | out: |
Trond Myklebust | f86bbcf | 2012-09-26 11:21:40 -0400 | [diff] [blame] | 1162 | dprintk("%s: inode %s/%llu pNFS layout segment %s for " |
| 1163 | "(%s, offset: %llu, length: %llu)\n", |
| 1164 | __func__, ino->i_sb->s_id, |
| 1165 | (unsigned long long)NFS_FILEID(ino), |
| 1166 | lseg == NULL ? "not found" : "found", |
| 1167 | iomode==IOMODE_RW ? "read/write" : "read-only", |
| 1168 | (unsigned long long)pos, |
| 1169 | (unsigned long long)count); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1170 | return lseg; |
| 1171 | out_unlock: |
| 1172 | spin_unlock(&ino->i_lock); |
Trond Myklebust | 830ffb5 | 2012-09-20 21:25:19 -0400 | [diff] [blame] | 1173 | goto out_put_layout_hdr; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1174 | } |
Andy Adamson | 7c24d94 | 2011-06-13 18:22:38 -0400 | [diff] [blame] | 1175 | EXPORT_SYMBOL_GPL(pnfs_update_layout); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1176 | |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 1177 | struct pnfs_layout_segment * |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1178 | pnfs_layout_process(struct nfs4_layoutget *lgp) |
| 1179 | { |
| 1180 | struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout; |
| 1181 | struct nfs4_layoutget_res *res = &lgp->res; |
| 1182 | struct pnfs_layout_segment *lseg; |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 1183 | struct inode *ino = lo->plh_inode; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1184 | int status = 0; |
| 1185 | |
| 1186 | /* Inject layout blob into I/O device driver */ |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 1187 | 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] | 1188 | if (!lseg || IS_ERR(lseg)) { |
| 1189 | if (!lseg) |
| 1190 | status = -ENOMEM; |
| 1191 | else |
| 1192 | status = PTR_ERR(lseg); |
| 1193 | dprintk("%s: Could not allocate layout: error %d\n", |
| 1194 | __func__, status); |
| 1195 | goto out; |
| 1196 | } |
| 1197 | |
| 1198 | spin_lock(&ino->i_lock); |
Trond Myklebust | a59c30a | 2012-03-01 11:17:47 -0500 | [diff] [blame] | 1199 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 1200 | dprintk("%s forget reply due to recall\n", __func__); |
| 1201 | goto out_forget_reply; |
| 1202 | } |
| 1203 | |
| 1204 | if (pnfs_layoutgets_blocked(lo, &res->stateid, 1)) { |
| 1205 | dprintk("%s forget reply due to state\n", __func__); |
| 1206 | goto out_forget_reply; |
| 1207 | } |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1208 | init_lseg(lo, lseg); |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 1209 | lseg->pls_range = res->range; |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1210 | pnfs_get_lseg(lseg); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1211 | pnfs_insert_layout(lo, lseg); |
| 1212 | |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 1213 | if (res->return_on_close) { |
| 1214 | set_bit(NFS_LSEG_ROC, &lseg->pls_flags); |
| 1215 | set_bit(NFS_LAYOUT_ROC, &lo->plh_flags); |
| 1216 | } |
| 1217 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1218 | /* Done processing layoutget. Set the layout stateid */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 1219 | pnfs_set_layout_stateid(lo, &res->stateid, false); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1220 | spin_unlock(&ino->i_lock); |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 1221 | return lseg; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1222 | out: |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 1223 | return ERR_PTR(status); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 1224 | |
| 1225 | out_forget_reply: |
| 1226 | spin_unlock(&ino->i_lock); |
| 1227 | lseg->pls_layout = lo; |
| 1228 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); |
| 1229 | goto out; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1230 | } |
| 1231 | |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1232 | void |
| 1233 | pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) |
| 1234 | { |
| 1235 | BUG_ON(pgio->pg_lseg != NULL); |
| 1236 | |
Fred Isaman | 1825a0d | 2012-04-20 19:55:31 -0400 | [diff] [blame] | 1237 | if (req->wb_offset != req->wb_pgbase) { |
| 1238 | nfs_pageio_reset_read_mds(pgio); |
| 1239 | return; |
| 1240 | } |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1241 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
| 1242 | req->wb_context, |
| 1243 | req_offset(req), |
| 1244 | req->wb_bytes, |
| 1245 | IOMODE_READ, |
| 1246 | GFP_KERNEL); |
Trond Myklebust | e885de1 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1247 | /* If no lseg, fall back to read through mds */ |
| 1248 | if (pgio->pg_lseg == NULL) |
Trond Myklebust | 1f94535 | 2011-07-13 15:59:57 -0400 | [diff] [blame] | 1249 | nfs_pageio_reset_read_mds(pgio); |
Trond Myklebust | e885de1 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1250 | |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1251 | } |
| 1252 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_read); |
| 1253 | |
| 1254 | void |
| 1255 | pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) |
| 1256 | { |
| 1257 | BUG_ON(pgio->pg_lseg != NULL); |
| 1258 | |
Fred Isaman | 1825a0d | 2012-04-20 19:55:31 -0400 | [diff] [blame] | 1259 | if (req->wb_offset != req->wb_pgbase) { |
| 1260 | nfs_pageio_reset_write_mds(pgio); |
| 1261 | return; |
| 1262 | } |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1263 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
| 1264 | req->wb_context, |
| 1265 | req_offset(req), |
| 1266 | req->wb_bytes, |
| 1267 | IOMODE_RW, |
| 1268 | GFP_NOFS); |
Trond Myklebust | e885de1 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1269 | /* If no lseg, fall back to write through mds */ |
| 1270 | if (pgio->pg_lseg == NULL) |
Trond Myklebust | 1f94535 | 2011-07-13 15:59:57 -0400 | [diff] [blame] | 1271 | nfs_pageio_reset_write_mds(pgio); |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1272 | } |
| 1273 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_write); |
| 1274 | |
Bryan Schumaker | 1abb5088 | 2012-06-20 15:53:47 -0400 | [diff] [blame] | 1275 | void |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1276 | pnfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, struct inode *inode, |
| 1277 | const struct nfs_pgio_completion_ops *compl_ops) |
Trond Myklebust | 1751c36 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1278 | { |
| 1279 | struct nfs_server *server = NFS_SERVER(inode); |
| 1280 | struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; |
| 1281 | |
| 1282 | if (ld == NULL) |
Bryan Schumaker | 1abb5088 | 2012-06-20 15:53:47 -0400 | [diff] [blame] | 1283 | nfs_pageio_init_read(pgio, inode, compl_ops); |
| 1284 | else |
| 1285 | nfs_pageio_init(pgio, inode, ld->pg_read_ops, compl_ops, server->rsize, 0); |
Trond Myklebust | 1751c36 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1286 | } |
| 1287 | |
Bryan Schumaker | 57208fa | 2012-06-20 15:53:48 -0400 | [diff] [blame] | 1288 | void |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1289 | pnfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, struct inode *inode, |
| 1290 | int ioflags, |
| 1291 | const struct nfs_pgio_completion_ops *compl_ops) |
Trond Myklebust | 1751c36 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1292 | { |
| 1293 | struct nfs_server *server = NFS_SERVER(inode); |
| 1294 | struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; |
| 1295 | |
| 1296 | if (ld == NULL) |
Bryan Schumaker | 57208fa | 2012-06-20 15:53:48 -0400 | [diff] [blame] | 1297 | nfs_pageio_init_write(pgio, inode, ioflags, compl_ops); |
| 1298 | else |
| 1299 | nfs_pageio_init(pgio, inode, ld->pg_write_ops, compl_ops, server->wsize, ioflags); |
Trond Myklebust | 1751c36 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1300 | } |
| 1301 | |
| 1302 | bool |
Benny Halevy | dfed206 | 2011-05-25 20:25:22 +0300 | [diff] [blame] | 1303 | pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, |
| 1304 | struct nfs_page *req) |
Fred Isaman | bae724e | 2011-03-01 01:34:15 +0000 | [diff] [blame] | 1305 | { |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1306 | if (pgio->pg_lseg == NULL) |
| 1307 | return nfs_generic_pg_test(pgio, prev, req); |
Benny Halevy | 89a58e3 | 2011-05-25 20:54:40 +0300 | [diff] [blame] | 1308 | |
Trond Myklebust | 19982ba | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1309 | /* |
| 1310 | * Test if a nfs_page is fully contained in the pnfs_layout_range. |
| 1311 | * Note that this test makes several assumptions: |
| 1312 | * - that the previous nfs_page in the struct nfs_pageio_descriptor |
| 1313 | * is known to lie within the range. |
| 1314 | * - that the nfs_page being tested is known to be contiguous with the |
| 1315 | * previous nfs_page. |
| 1316 | * - Layout ranges are page aligned, so we only have to test the |
| 1317 | * start offset of the request. |
| 1318 | * |
| 1319 | * Please also note that 'end_offset' is actually the offset of the |
| 1320 | * first byte that lies outside the pnfs_layout_range. FIXME? |
| 1321 | * |
| 1322 | */ |
| 1323 | return req_offset(req) < end_offset(pgio->pg_lseg->pls_range.offset, |
| 1324 | pgio->pg_lseg->pls_range.length); |
Fred Isaman | bae724e | 2011-03-01 01:34:15 +0000 | [diff] [blame] | 1325 | } |
Benny Halevy | 89a58e3 | 2011-05-25 20:54:40 +0300 | [diff] [blame] | 1326 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_test); |
Fred Isaman | bae724e | 2011-03-01 01:34:15 +0000 | [diff] [blame] | 1327 | |
Andy Adamson | e7dd79af | 2012-04-27 17:53:46 -0400 | [diff] [blame] | 1328 | int pnfs_write_done_resend_to_mds(struct inode *inode, |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1329 | struct list_head *head, |
| 1330 | const struct nfs_pgio_completion_ops *compl_ops) |
Trond Myklebust | e2fecb2 | 2012-01-06 08:57:46 -0500 | [diff] [blame] | 1331 | { |
| 1332 | struct nfs_pageio_descriptor pgio; |
| 1333 | LIST_HEAD(failed); |
| 1334 | |
| 1335 | /* Resend all requests through the MDS */ |
Bryan Schumaker | 57208fa | 2012-06-20 15:53:48 -0400 | [diff] [blame] | 1336 | nfs_pageio_init_write(&pgio, inode, FLUSH_STABLE, compl_ops); |
Trond Myklebust | e2fecb2 | 2012-01-06 08:57:46 -0500 | [diff] [blame] | 1337 | while (!list_empty(head)) { |
| 1338 | struct nfs_page *req = nfs_list_entry(head->next); |
| 1339 | |
| 1340 | nfs_list_remove_request(req); |
| 1341 | if (!nfs_pageio_add_request(&pgio, req)) |
| 1342 | nfs_list_add_request(req, &failed); |
| 1343 | } |
| 1344 | nfs_pageio_complete(&pgio); |
| 1345 | |
| 1346 | if (!list_empty(&failed)) { |
| 1347 | /* For some reason our attempt to resend pages. Mark the |
| 1348 | * overall send request as having failed, and let |
| 1349 | * nfs_writeback_release_full deal with the error. |
| 1350 | */ |
| 1351 | list_move(&failed, head); |
| 1352 | return -EIO; |
| 1353 | } |
| 1354 | return 0; |
| 1355 | } |
Andy Adamson | e7dd79af | 2012-04-27 17:53:46 -0400 | [diff] [blame] | 1356 | EXPORT_SYMBOL_GPL(pnfs_write_done_resend_to_mds); |
Trond Myklebust | e2fecb2 | 2012-01-06 08:57:46 -0500 | [diff] [blame] | 1357 | |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1358 | static void pnfs_ld_handle_write_error(struct nfs_write_data *data) |
| 1359 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1360 | struct nfs_pgio_header *hdr = data->header; |
| 1361 | |
| 1362 | dprintk("pnfs write error = %d\n", hdr->pnfs_error); |
| 1363 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1364 | PNFS_LAYOUTRET_ON_ERROR) { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1365 | clear_bit(NFS_INO_LAYOUTCOMMIT, &NFS_I(hdr->inode)->flags); |
| 1366 | pnfs_return_layout(hdr->inode); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1367 | } |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1368 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
| 1369 | data->task.tk_status = pnfs_write_done_resend_to_mds(hdr->inode, |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1370 | &hdr->pages, |
| 1371 | hdr->completion_ops); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1372 | } |
| 1373 | |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1374 | /* |
| 1375 | * Called by non rpc-based layout drivers |
| 1376 | */ |
Peng Tao | 8ce160c | 2011-09-22 21:50:14 -0400 | [diff] [blame] | 1377 | void pnfs_ld_write_done(struct nfs_write_data *data) |
Fred Isaman | 94ad1c8 | 2011-03-01 01:34:14 +0000 | [diff] [blame] | 1378 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1379 | struct nfs_pgio_header *hdr = data->header; |
| 1380 | |
| 1381 | if (!hdr->pnfs_error) { |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1382 | pnfs_set_layoutcommit(data); |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1383 | hdr->mds_ops->rpc_call_done(&data->task, data); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1384 | } else |
| 1385 | pnfs_ld_handle_write_error(data); |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1386 | hdr->mds_ops->rpc_release(data); |
Fred Isaman | 44b8379 | 2011-03-03 15:13:44 +0000 | [diff] [blame] | 1387 | } |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1388 | EXPORT_SYMBOL_GPL(pnfs_ld_write_done); |
Fred Isaman | 44b8379 | 2011-03-03 15:13:44 +0000 | [diff] [blame] | 1389 | |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1390 | static void |
| 1391 | pnfs_write_through_mds(struct nfs_pageio_descriptor *desc, |
| 1392 | struct nfs_write_data *data) |
| 1393 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1394 | struct nfs_pgio_header *hdr = data->header; |
| 1395 | |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1396 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
| 1397 | list_splice_tail_init(&hdr->pages, &desc->pg_list); |
| 1398 | nfs_pageio_reset_write_mds(desc); |
| 1399 | desc->pg_recoalesce = 1; |
| 1400 | } |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1401 | nfs_writedata_release(data); |
| 1402 | } |
| 1403 | |
| 1404 | static enum pnfs_try_status |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1405 | pnfs_try_to_write_data(struct nfs_write_data *wdata, |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1406 | const struct rpc_call_ops *call_ops, |
| 1407 | struct pnfs_layout_segment *lseg, |
| 1408 | int how) |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1409 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1410 | struct nfs_pgio_header *hdr = wdata->header; |
| 1411 | struct inode *inode = hdr->inode; |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1412 | enum pnfs_try_status trypnfs; |
| 1413 | struct nfs_server *nfss = NFS_SERVER(inode); |
| 1414 | |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1415 | hdr->mds_ops = call_ops; |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1416 | |
| 1417 | dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__, |
| 1418 | inode->i_ino, wdata->args.count, wdata->args.offset, how); |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1419 | trypnfs = nfss->pnfs_curr_ld->write_pagelist(wdata, how); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1420 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1421 | nfs_inc_stats(inode, NFSIOS_PNFS_WRITE); |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1422 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
| 1423 | return trypnfs; |
| 1424 | } |
| 1425 | |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1426 | static void |
| 1427 | pnfs_do_multiple_writes(struct nfs_pageio_descriptor *desc, struct list_head *head, int how) |
| 1428 | { |
| 1429 | struct nfs_write_data *data; |
| 1430 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
| 1431 | struct pnfs_layout_segment *lseg = desc->pg_lseg; |
| 1432 | |
| 1433 | desc->pg_lseg = NULL; |
| 1434 | while (!list_empty(head)) { |
| 1435 | enum pnfs_try_status trypnfs; |
| 1436 | |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1437 | data = list_first_entry(head, struct nfs_write_data, list); |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1438 | list_del_init(&data->list); |
| 1439 | |
| 1440 | trypnfs = pnfs_try_to_write_data(data, call_ops, lseg, how); |
| 1441 | if (trypnfs == PNFS_NOT_ATTEMPTED) |
| 1442 | pnfs_write_through_mds(desc, data); |
| 1443 | } |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1444 | pnfs_put_lseg(lseg); |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1445 | } |
| 1446 | |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1447 | static void pnfs_writehdr_free(struct nfs_pgio_header *hdr) |
| 1448 | { |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1449 | pnfs_put_lseg(hdr->lseg); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1450 | nfs_writehdr_free(hdr); |
| 1451 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1452 | EXPORT_SYMBOL_GPL(pnfs_writehdr_free); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1453 | |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1454 | int |
| 1455 | pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) |
| 1456 | { |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1457 | struct nfs_write_header *whdr; |
| 1458 | struct nfs_pgio_header *hdr; |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1459 | int ret; |
| 1460 | |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1461 | whdr = nfs_writehdr_alloc(); |
| 1462 | if (!whdr) { |
Trond Myklebust | 9b5415b | 2012-04-27 14:31:47 -0400 | [diff] [blame] | 1463 | desc->pg_completion_ops->error_cleanup(&desc->pg_list); |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1464 | pnfs_put_lseg(desc->pg_lseg); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1465 | desc->pg_lseg = NULL; |
| 1466 | return -ENOMEM; |
| 1467 | } |
| 1468 | hdr = &whdr->header; |
| 1469 | nfs_pgheader_init(desc, hdr, pnfs_writehdr_free); |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1470 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1471 | atomic_inc(&hdr->refcnt); |
| 1472 | ret = nfs_generic_flush(desc, hdr); |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1473 | if (ret != 0) { |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1474 | pnfs_put_lseg(desc->pg_lseg); |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1475 | desc->pg_lseg = NULL; |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1476 | } else |
| 1477 | pnfs_do_multiple_writes(desc, &hdr->rpc_list, desc->pg_ioflags); |
| 1478 | if (atomic_dec_and_test(&hdr->refcnt)) |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1479 | hdr->completion_ops->completion(hdr); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1480 | return ret; |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1481 | } |
| 1482 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages); |
| 1483 | |
Andy Adamson | e7dd79af | 2012-04-27 17:53:46 -0400 | [diff] [blame] | 1484 | int pnfs_read_done_resend_to_mds(struct inode *inode, |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1485 | struct list_head *head, |
| 1486 | const struct nfs_pgio_completion_ops *compl_ops) |
Trond Myklebust | 62e4a76 | 2011-11-10 14:30:37 -0500 | [diff] [blame] | 1487 | { |
| 1488 | struct nfs_pageio_descriptor pgio; |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1489 | LIST_HEAD(failed); |
Trond Myklebust | 62e4a76 | 2011-11-10 14:30:37 -0500 | [diff] [blame] | 1490 | |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1491 | /* Resend all requests through the MDS */ |
Bryan Schumaker | 1abb5088 | 2012-06-20 15:53:47 -0400 | [diff] [blame] | 1492 | nfs_pageio_init_read(&pgio, inode, compl_ops); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1493 | while (!list_empty(head)) { |
| 1494 | struct nfs_page *req = nfs_list_entry(head->next); |
Trond Myklebust | 62e4a76 | 2011-11-10 14:30:37 -0500 | [diff] [blame] | 1495 | |
| 1496 | nfs_list_remove_request(req); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1497 | if (!nfs_pageio_add_request(&pgio, req)) |
| 1498 | nfs_list_add_request(req, &failed); |
Trond Myklebust | 62e4a76 | 2011-11-10 14:30:37 -0500 | [diff] [blame] | 1499 | } |
| 1500 | nfs_pageio_complete(&pgio); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1501 | |
| 1502 | if (!list_empty(&failed)) { |
| 1503 | list_move(&failed, head); |
| 1504 | return -EIO; |
| 1505 | } |
| 1506 | return 0; |
| 1507 | } |
Andy Adamson | e7dd79af | 2012-04-27 17:53:46 -0400 | [diff] [blame] | 1508 | EXPORT_SYMBOL_GPL(pnfs_read_done_resend_to_mds); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1509 | |
| 1510 | static void pnfs_ld_handle_read_error(struct nfs_read_data *data) |
| 1511 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1512 | struct nfs_pgio_header *hdr = data->header; |
| 1513 | |
| 1514 | dprintk("pnfs read error = %d\n", hdr->pnfs_error); |
| 1515 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1516 | PNFS_LAYOUTRET_ON_ERROR) { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1517 | clear_bit(NFS_INO_LAYOUTCOMMIT, &NFS_I(hdr->inode)->flags); |
| 1518 | pnfs_return_layout(hdr->inode); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1519 | } |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1520 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
| 1521 | data->task.tk_status = pnfs_read_done_resend_to_mds(hdr->inode, |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1522 | &hdr->pages, |
| 1523 | hdr->completion_ops); |
Trond Myklebust | 62e4a76 | 2011-11-10 14:30:37 -0500 | [diff] [blame] | 1524 | } |
| 1525 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1526 | /* |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1527 | * Called by non rpc-based layout drivers |
| 1528 | */ |
Peng Tao | 9b7eecd | 2011-09-22 21:50:15 -0400 | [diff] [blame] | 1529 | void pnfs_ld_read_done(struct nfs_read_data *data) |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1530 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1531 | struct nfs_pgio_header *hdr = data->header; |
| 1532 | |
| 1533 | if (likely(!hdr->pnfs_error)) { |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1534 | __nfs4_read_done_cb(data); |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1535 | hdr->mds_ops->rpc_call_done(&data->task, data); |
Trond Myklebust | 62e4a76 | 2011-11-10 14:30:37 -0500 | [diff] [blame] | 1536 | } else |
| 1537 | pnfs_ld_handle_read_error(data); |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1538 | hdr->mds_ops->rpc_release(data); |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1539 | } |
| 1540 | EXPORT_SYMBOL_GPL(pnfs_ld_read_done); |
| 1541 | |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1542 | static void |
| 1543 | pnfs_read_through_mds(struct nfs_pageio_descriptor *desc, |
| 1544 | struct nfs_read_data *data) |
| 1545 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1546 | struct nfs_pgio_header *hdr = data->header; |
| 1547 | |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1548 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
| 1549 | list_splice_tail_init(&hdr->pages, &desc->pg_list); |
| 1550 | nfs_pageio_reset_read_mds(desc); |
| 1551 | desc->pg_recoalesce = 1; |
| 1552 | } |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1553 | nfs_readdata_release(data); |
| 1554 | } |
| 1555 | |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1556 | /* |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1557 | * Call the appropriate parallel I/O subsystem read function. |
| 1558 | */ |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1559 | static enum pnfs_try_status |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1560 | pnfs_try_to_read_data(struct nfs_read_data *rdata, |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1561 | const struct rpc_call_ops *call_ops, |
| 1562 | struct pnfs_layout_segment *lseg) |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1563 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1564 | struct nfs_pgio_header *hdr = rdata->header; |
| 1565 | struct inode *inode = hdr->inode; |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1566 | struct nfs_server *nfss = NFS_SERVER(inode); |
| 1567 | enum pnfs_try_status trypnfs; |
| 1568 | |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1569 | hdr->mds_ops = call_ops; |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1570 | |
| 1571 | dprintk("%s: Reading ino:%lu %u@%llu\n", |
| 1572 | __func__, inode->i_ino, rdata->args.count, rdata->args.offset); |
| 1573 | |
| 1574 | trypnfs = nfss->pnfs_curr_ld->read_pagelist(rdata); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1575 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1576 | nfs_inc_stats(inode, NFSIOS_PNFS_READ); |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1577 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
| 1578 | return trypnfs; |
| 1579 | } |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1580 | |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1581 | static void |
| 1582 | pnfs_do_multiple_reads(struct nfs_pageio_descriptor *desc, struct list_head *head) |
| 1583 | { |
| 1584 | struct nfs_read_data *data; |
| 1585 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
| 1586 | struct pnfs_layout_segment *lseg = desc->pg_lseg; |
| 1587 | |
| 1588 | desc->pg_lseg = NULL; |
| 1589 | while (!list_empty(head)) { |
| 1590 | enum pnfs_try_status trypnfs; |
| 1591 | |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1592 | data = list_first_entry(head, struct nfs_read_data, list); |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1593 | list_del_init(&data->list); |
| 1594 | |
| 1595 | trypnfs = pnfs_try_to_read_data(data, call_ops, lseg); |
| 1596 | if (trypnfs == PNFS_NOT_ATTEMPTED) |
| 1597 | pnfs_read_through_mds(desc, data); |
| 1598 | } |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1599 | pnfs_put_lseg(lseg); |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1600 | } |
| 1601 | |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1602 | static void pnfs_readhdr_free(struct nfs_pgio_header *hdr) |
| 1603 | { |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1604 | pnfs_put_lseg(hdr->lseg); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1605 | nfs_readhdr_free(hdr); |
| 1606 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1607 | EXPORT_SYMBOL_GPL(pnfs_readhdr_free); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1608 | |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1609 | int |
| 1610 | pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc) |
| 1611 | { |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1612 | struct nfs_read_header *rhdr; |
| 1613 | struct nfs_pgio_header *hdr; |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1614 | int ret; |
| 1615 | |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1616 | rhdr = nfs_readhdr_alloc(); |
| 1617 | if (!rhdr) { |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1618 | desc->pg_completion_ops->error_cleanup(&desc->pg_list); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1619 | ret = -ENOMEM; |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1620 | pnfs_put_lseg(desc->pg_lseg); |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1621 | desc->pg_lseg = NULL; |
| 1622 | return ret; |
| 1623 | } |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1624 | hdr = &rhdr->header; |
| 1625 | nfs_pgheader_init(desc, hdr, pnfs_readhdr_free); |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1626 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1627 | atomic_inc(&hdr->refcnt); |
| 1628 | ret = nfs_generic_pagein(desc, hdr); |
| 1629 | if (ret != 0) { |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1630 | pnfs_put_lseg(desc->pg_lseg); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1631 | desc->pg_lseg = NULL; |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1632 | } else |
| 1633 | pnfs_do_multiple_reads(desc, &hdr->rpc_list); |
| 1634 | if (atomic_dec_and_test(&hdr->refcnt)) |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1635 | hdr->completion_ops->completion(hdr); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1636 | return ret; |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1637 | } |
| 1638 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_readpages); |
| 1639 | |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1640 | /* |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1641 | * There can be multiple RW segments. |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1642 | */ |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1643 | 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] | 1644 | { |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1645 | struct pnfs_layout_segment *lseg; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1646 | |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1647 | list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) { |
| 1648 | if (lseg->pls_range.iomode == IOMODE_RW && |
| 1649 | test_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) |
| 1650 | list_add(&lseg->pls_lc_list, listp); |
| 1651 | } |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1652 | } |
| 1653 | |
Peng Tao | 1b0ae06 | 2011-09-22 21:50:12 -0400 | [diff] [blame] | 1654 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg) |
| 1655 | { |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 1656 | pnfs_layout_io_set_failed(lseg->pls_layout, lseg->pls_range.iomode); |
Peng Tao | 1b0ae06 | 2011-09-22 21:50:12 -0400 | [diff] [blame] | 1657 | } |
| 1658 | EXPORT_SYMBOL_GPL(pnfs_set_lo_fail); |
| 1659 | |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1660 | void |
| 1661 | pnfs_set_layoutcommit(struct nfs_write_data *wdata) |
| 1662 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1663 | struct nfs_pgio_header *hdr = wdata->header; |
| 1664 | struct inode *inode = hdr->inode; |
| 1665 | struct nfs_inode *nfsi = NFS_I(inode); |
Vitaliy Gusev | 4b8ee2b | 2011-05-20 01:34:46 +0400 | [diff] [blame] | 1666 | loff_t end_pos = wdata->mds_offset + wdata->res.count; |
Weston Andros Adamson | 79a48a1 | 2011-04-13 10:53:51 -0400 | [diff] [blame] | 1667 | bool mark_as_dirty = false; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1668 | |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1669 | spin_lock(&inode->i_lock); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1670 | if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { |
Weston Andros Adamson | 79a48a1 | 2011-04-13 10:53:51 -0400 | [diff] [blame] | 1671 | mark_as_dirty = true; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1672 | dprintk("%s: Set layoutcommit for inode %lu ", |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1673 | __func__, inode->i_ino); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1674 | } |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1675 | if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &hdr->lseg->pls_flags)) { |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1676 | /* references matched in nfs4_layoutcommit_release */ |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1677 | pnfs_get_lseg(hdr->lseg); |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1678 | } |
Peng Tao | acff5880 | 2011-07-30 20:52:31 -0400 | [diff] [blame] | 1679 | if (end_pos > nfsi->layout->plh_lwb) |
| 1680 | nfsi->layout->plh_lwb = end_pos; |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1681 | spin_unlock(&inode->i_lock); |
Peng Tao | acff5880 | 2011-07-30 20:52:31 -0400 | [diff] [blame] | 1682 | dprintk("%s: lseg %p end_pos %llu\n", |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1683 | __func__, hdr->lseg, nfsi->layout->plh_lwb); |
Weston Andros Adamson | 79a48a1 | 2011-04-13 10:53:51 -0400 | [diff] [blame] | 1684 | |
| 1685 | /* if pnfs_layoutcommit_inode() runs between inode locks, the next one |
| 1686 | * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ |
| 1687 | if (mark_as_dirty) |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1688 | mark_inode_dirty_sync(inode); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1689 | } |
| 1690 | EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit); |
| 1691 | |
Andy Adamson | db29c08 | 2011-07-30 20:52:38 -0400 | [diff] [blame] | 1692 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data) |
| 1693 | { |
| 1694 | struct nfs_server *nfss = NFS_SERVER(data->args.inode); |
| 1695 | |
| 1696 | if (nfss->pnfs_curr_ld->cleanup_layoutcommit) |
| 1697 | nfss->pnfs_curr_ld->cleanup_layoutcommit(data); |
| 1698 | } |
| 1699 | |
Andy Adamson | de4b15c | 2011-03-12 02:58:09 -0500 | [diff] [blame] | 1700 | /* |
| 1701 | * For the LAYOUT4_NFSV4_1_FILES layout type, NFS_DATA_SYNC WRITEs and |
| 1702 | * NFS_UNSTABLE WRITEs with a COMMIT to data servers must store enough |
| 1703 | * data to disk to allow the server to recover the data if it crashes. |
| 1704 | * LAYOUTCOMMIT is only needed when the NFL4_UFLG_COMMIT_THRU_MDS flag |
| 1705 | * is off, and a COMMIT is sent to a data server, or |
| 1706 | * if WRITEs to a data server return NFS_DATA_SYNC. |
| 1707 | */ |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1708 | int |
Andy Adamson | ef31153 | 2011-03-12 02:58:10 -0500 | [diff] [blame] | 1709 | pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1710 | { |
| 1711 | struct nfs4_layoutcommit_data *data; |
| 1712 | struct nfs_inode *nfsi = NFS_I(inode); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1713 | loff_t end_pos; |
| 1714 | int status = 0; |
| 1715 | |
| 1716 | dprintk("--> %s inode %lu\n", __func__, inode->i_ino); |
| 1717 | |
Andy Adamson | de4b15c | 2011-03-12 02:58:09 -0500 | [diff] [blame] | 1718 | if (!test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
| 1719 | return 0; |
| 1720 | |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1721 | /* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */ |
| 1722 | data = kzalloc(sizeof(*data), GFP_NOFS); |
Andy Adamson | de4b15c | 2011-03-12 02:58:09 -0500 | [diff] [blame] | 1723 | if (!data) { |
Andy Adamson | de4b15c | 2011-03-12 02:58:09 -0500 | [diff] [blame] | 1724 | status = -ENOMEM; |
| 1725 | goto out; |
| 1726 | } |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1727 | |
Peng Tao | 92407e7 | 2011-10-23 20:21:17 -0700 | [diff] [blame] | 1728 | if (!test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
| 1729 | goto out_free; |
| 1730 | |
| 1731 | if (test_and_set_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags)) { |
| 1732 | if (!sync) { |
| 1733 | status = -EAGAIN; |
| 1734 | goto out_free; |
| 1735 | } |
| 1736 | status = wait_on_bit_lock(&nfsi->flags, NFS_INO_LAYOUTCOMMITTING, |
| 1737 | nfs_wait_bit_killable, TASK_KILLABLE); |
| 1738 | if (status) |
| 1739 | goto out_free; |
| 1740 | } |
| 1741 | |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1742 | INIT_LIST_HEAD(&data->lseg_list); |
Andy Adamson | de4b15c | 2011-03-12 02:58:09 -0500 | [diff] [blame] | 1743 | spin_lock(&inode->i_lock); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1744 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { |
Peng Tao | 92407e7 | 2011-10-23 20:21:17 -0700 | [diff] [blame] | 1745 | clear_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1746 | spin_unlock(&inode->i_lock); |
Peng Tao | 92407e7 | 2011-10-23 20:21:17 -0700 | [diff] [blame] | 1747 | wake_up_bit(&nfsi->flags, NFS_INO_LAYOUTCOMMITTING); |
| 1748 | goto out_free; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1749 | } |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1750 | |
| 1751 | pnfs_list_write_lseg(inode, &data->lseg_list); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1752 | |
Peng Tao | acff5880 | 2011-07-30 20:52:31 -0400 | [diff] [blame] | 1753 | end_pos = nfsi->layout->plh_lwb; |
Peng Tao | acff5880 | 2011-07-30 20:52:31 -0400 | [diff] [blame] | 1754 | nfsi->layout->plh_lwb = 0; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1755 | |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 1756 | nfs4_stateid_copy(&data->args.stateid, &nfsi->layout->plh_stateid); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1757 | spin_unlock(&inode->i_lock); |
| 1758 | |
| 1759 | data->args.inode = inode; |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 1760 | data->cred = get_rpccred(nfsi->layout->plh_lc_cred); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1761 | nfs_fattr_init(&data->fattr); |
| 1762 | data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; |
| 1763 | data->res.fattr = &data->fattr; |
| 1764 | data->args.lastbytewritten = end_pos - 1; |
| 1765 | data->res.server = NFS_SERVER(inode); |
| 1766 | |
| 1767 | status = nfs4_proc_layoutcommit(data, sync); |
| 1768 | out: |
Peng Tao | 92407e7 | 2011-10-23 20:21:17 -0700 | [diff] [blame] | 1769 | if (status) |
| 1770 | mark_inode_dirty_sync(inode); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1771 | dprintk("<-- %s status %d\n", __func__, status); |
| 1772 | return status; |
Peng Tao | 92407e7 | 2011-10-23 20:21:17 -0700 | [diff] [blame] | 1773 | out_free: |
| 1774 | kfree(data); |
| 1775 | goto out; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1776 | } |
Andy Adamson | 82be417 | 2012-05-23 05:02:35 -0400 | [diff] [blame] | 1777 | |
| 1778 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) |
| 1779 | { |
| 1780 | struct nfs4_threshold *thp; |
| 1781 | |
| 1782 | thp = kzalloc(sizeof(*thp), GFP_NOFS); |
| 1783 | if (!thp) { |
| 1784 | dprintk("%s mdsthreshold allocation failed\n", __func__); |
| 1785 | return NULL; |
| 1786 | } |
| 1787 | return thp; |
| 1788 | } |