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; |
Trond Myklebust | 5793427 | 2012-09-20 20:37:23 -0400 | [diff] [blame] | 203 | return ld->alloc_layout_hdr(ino, gfp_flags); |
Benny Halevy | 636fb9c | 2011-05-22 19:51:33 +0300 | [diff] [blame] | 204 | } |
| 205 | |
| 206 | static void |
| 207 | pnfs_free_layout_hdr(struct pnfs_layout_hdr *lo) |
| 208 | { |
Trond Myklebust | 9c62638 | 2012-09-20 17:31:43 -0400 | [diff] [blame] | 209 | struct nfs_server *server = NFS_SERVER(lo->plh_inode); |
| 210 | struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; |
| 211 | |
| 212 | if (!list_empty(&lo->plh_layouts)) { |
| 213 | struct nfs_client *clp = server->nfs_client; |
| 214 | |
| 215 | spin_lock(&clp->cl_lock); |
| 216 | list_del_init(&lo->plh_layouts); |
| 217 | spin_unlock(&clp->cl_lock); |
| 218 | } |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 219 | put_rpccred(lo->plh_lc_cred); |
Trond Myklebust | 5793427 | 2012-09-20 20:37:23 -0400 | [diff] [blame] | 220 | return ld->free_layout_hdr(lo); |
Benny Halevy | 636fb9c | 2011-05-22 19:51:33 +0300 | [diff] [blame] | 221 | } |
| 222 | |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 223 | static void |
Trond Myklebust | 6622c3e | 2012-09-20 17:23:11 -0400 | [diff] [blame] | 224 | pnfs_detach_layout_hdr(struct pnfs_layout_hdr *lo) |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 225 | { |
Trond Myklebust | bb346f6 | 2012-09-20 15:52:13 -0400 | [diff] [blame] | 226 | struct nfs_inode *nfsi = NFS_I(lo->plh_inode); |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 227 | dprintk("%s: freeing layout cache %p\n", __func__, lo); |
Trond Myklebust | bb346f6 | 2012-09-20 15:52:13 -0400 | [diff] [blame] | 228 | nfsi->layout = NULL; |
| 229 | /* Reset MDS Threshold I/O counters */ |
| 230 | nfsi->write_io = 0; |
| 231 | nfsi->read_io = 0; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 232 | } |
| 233 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 234 | void |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 235 | pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 236 | { |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 237 | struct inode *inode = lo->plh_inode; |
| 238 | |
| 239 | if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) { |
Trond Myklebust | 6622c3e | 2012-09-20 17:23:11 -0400 | [diff] [blame] | 240 | pnfs_detach_layout_hdr(lo); |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 241 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 6622c3e | 2012-09-20 17:23:11 -0400 | [diff] [blame] | 242 | pnfs_free_layout_hdr(lo); |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 243 | } |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 244 | } |
| 245 | |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 246 | static int |
| 247 | pnfs_iomode_to_fail_bit(u32 iomode) |
| 248 | { |
| 249 | return iomode == IOMODE_RW ? |
| 250 | NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; |
| 251 | } |
| 252 | |
| 253 | static void |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 254 | 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] | 255 | { |
Trond Myklebust | 25c7533 | 2012-09-18 17:01:12 -0400 | [diff] [blame] | 256 | lo->plh_retry_timestamp = jiffies; |
Yanchuan Nian | 39e88fc | 2013-01-04 20:19:49 +0800 | [diff] [blame] | 257 | if (!test_and_set_bit(fail_bit, &lo->plh_flags)) |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 258 | atomic_inc(&lo->plh_refcount); |
| 259 | } |
| 260 | |
| 261 | static void |
| 262 | pnfs_layout_clear_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) |
| 263 | { |
| 264 | if (test_and_clear_bit(fail_bit, &lo->plh_flags)) |
| 265 | atomic_dec(&lo->plh_refcount); |
| 266 | } |
| 267 | |
| 268 | static void |
| 269 | pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode) |
| 270 | { |
| 271 | struct inode *inode = lo->plh_inode; |
Trond Myklebust | 115ce57 | 2012-09-20 21:19:43 -0400 | [diff] [blame] | 272 | struct pnfs_layout_range range = { |
| 273 | .iomode = iomode, |
| 274 | .offset = 0, |
| 275 | .length = NFS4_MAX_UINT64, |
| 276 | }; |
| 277 | LIST_HEAD(head); |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 278 | |
| 279 | spin_lock(&inode->i_lock); |
| 280 | pnfs_layout_set_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); |
Trond Myklebust | 115ce57 | 2012-09-20 21:19:43 -0400 | [diff] [blame] | 281 | pnfs_mark_matching_lsegs_invalid(lo, &head, &range); |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 282 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 115ce57 | 2012-09-20 21:19:43 -0400 | [diff] [blame] | 283 | pnfs_free_lseg_list(&head); |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 284 | dprintk("%s Setting layout IOMODE_%s fail bit\n", __func__, |
| 285 | iomode == IOMODE_RW ? "RW" : "READ"); |
| 286 | } |
| 287 | |
| 288 | static bool |
| 289 | pnfs_layout_io_test_failed(struct pnfs_layout_hdr *lo, u32 iomode) |
| 290 | { |
Trond Myklebust | 25c7533 | 2012-09-18 17:01:12 -0400 | [diff] [blame] | 291 | unsigned long start, end; |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 292 | int fail_bit = pnfs_iomode_to_fail_bit(iomode); |
| 293 | |
| 294 | if (test_bit(fail_bit, &lo->plh_flags) == 0) |
Trond Myklebust | 25c7533 | 2012-09-18 17:01:12 -0400 | [diff] [blame] | 295 | return false; |
| 296 | end = jiffies; |
| 297 | start = end - PNFS_LAYOUTGET_RETRY_TIMEOUT; |
| 298 | if (!time_in_range(lo->plh_retry_timestamp, start, end)) { |
| 299 | /* It is time to retry the failed layoutgets */ |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 300 | pnfs_layout_clear_fail_bit(lo, fail_bit); |
Trond Myklebust | 25c7533 | 2012-09-18 17:01:12 -0400 | [diff] [blame] | 301 | return false; |
| 302 | } |
| 303 | return true; |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 304 | } |
| 305 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 306 | static void |
| 307 | init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg) |
| 308 | { |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 309 | INIT_LIST_HEAD(&lseg->pls_list); |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 310 | INIT_LIST_HEAD(&lseg->pls_lc_list); |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 311 | atomic_set(&lseg->pls_refcount, 1); |
| 312 | smp_mb(); |
| 313 | set_bit(NFS_LSEG_VALID, &lseg->pls_flags); |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 314 | lseg->pls_layout = lo; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 315 | } |
| 316 | |
Trond Myklebust | 905ca19 | 2012-09-20 20:46:49 -0400 | [diff] [blame] | 317 | static void pnfs_free_lseg(struct pnfs_layout_segment *lseg) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 318 | { |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 319 | struct inode *ino = lseg->pls_layout->plh_inode; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 320 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 321 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 322 | } |
| 323 | |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 324 | static void |
Trond Myklebust | 57036a3 | 2012-09-20 16:33:30 -0400 | [diff] [blame] | 325 | pnfs_layout_remove_lseg(struct pnfs_layout_hdr *lo, |
| 326 | struct pnfs_layout_segment *lseg) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 327 | { |
Trond Myklebust | 57036a3 | 2012-09-20 16:33:30 -0400 | [diff] [blame] | 328 | struct inode *inode = lo->plh_inode; |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 329 | |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 330 | WARN_ON(test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 331 | list_del_init(&lseg->pls_list); |
Trond Myklebust | 8f0d27d | 2012-09-20 20:57:11 -0400 | [diff] [blame] | 332 | /* Matched by pnfs_get_layout_hdr in pnfs_layout_insert_lseg */ |
| 333 | atomic_dec(&lo->plh_refcount); |
Trond Myklebust | 173f77e | 2012-09-21 15:49:42 -0400 | [diff] [blame] | 334 | if (list_empty(&lo->plh_segs)) |
| 335 | clear_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 336 | rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq); |
| 337 | } |
| 338 | |
Fred Isaman | bae724e | 2011-03-01 01:34:15 +0000 | [diff] [blame] | 339 | void |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 340 | pnfs_put_lseg(struct pnfs_layout_segment *lseg) |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 341 | { |
Trond Myklebust | 57036a3 | 2012-09-20 16:33:30 -0400 | [diff] [blame] | 342 | struct pnfs_layout_hdr *lo; |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 343 | struct inode *inode; |
| 344 | |
| 345 | if (!lseg) |
| 346 | return; |
| 347 | |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 348 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, |
| 349 | atomic_read(&lseg->pls_refcount), |
| 350 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
Trond Myklebust | 57036a3 | 2012-09-20 16:33:30 -0400 | [diff] [blame] | 351 | lo = lseg->pls_layout; |
| 352 | inode = lo->plh_inode; |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 353 | if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) { |
Trond Myklebust | 8f0d27d | 2012-09-20 20:57:11 -0400 | [diff] [blame] | 354 | pnfs_get_layout_hdr(lo); |
Trond Myklebust | 57036a3 | 2012-09-20 16:33:30 -0400 | [diff] [blame] | 355 | pnfs_layout_remove_lseg(lo, lseg); |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 356 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 905ca19 | 2012-09-20 20:46:49 -0400 | [diff] [blame] | 357 | pnfs_free_lseg(lseg); |
Trond Myklebust | 8f0d27d | 2012-09-20 20:57:11 -0400 | [diff] [blame] | 358 | pnfs_put_layout_hdr(lo); |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 359 | } |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 360 | } |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 361 | EXPORT_SYMBOL_GPL(pnfs_put_lseg); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 362 | |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 363 | static inline u64 |
| 364 | end_offset(u64 start, u64 len) |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 365 | { |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 366 | u64 end; |
| 367 | |
| 368 | end = start + len; |
| 369 | return end >= start ? end : NFS4_MAX_UINT64; |
| 370 | } |
| 371 | |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 372 | /* |
| 373 | * is l2 fully contained in l1? |
| 374 | * start1 end1 |
| 375 | * [----------------------------------) |
| 376 | * start2 end2 |
| 377 | * [----------------) |
| 378 | */ |
| 379 | static inline int |
| 380 | lo_seg_contained(struct pnfs_layout_range *l1, |
| 381 | struct pnfs_layout_range *l2) |
| 382 | { |
| 383 | u64 start1 = l1->offset; |
| 384 | u64 end1 = end_offset(start1, l1->length); |
| 385 | u64 start2 = l2->offset; |
| 386 | u64 end2 = end_offset(start2, l2->length); |
| 387 | |
| 388 | return (start1 <= start2) && (end1 >= end2); |
| 389 | } |
| 390 | |
| 391 | /* |
| 392 | * is l1 and l2 intersecting? |
| 393 | * start1 end1 |
| 394 | * [----------------------------------) |
| 395 | * start2 end2 |
| 396 | * [----------------) |
| 397 | */ |
| 398 | static inline int |
| 399 | lo_seg_intersecting(struct pnfs_layout_range *l1, |
| 400 | struct pnfs_layout_range *l2) |
| 401 | { |
| 402 | u64 start1 = l1->offset; |
| 403 | u64 end1 = end_offset(start1, l1->length); |
| 404 | u64 start2 = l2->offset; |
| 405 | u64 end2 = end_offset(start2, l2->length); |
| 406 | |
| 407 | return (end1 == NFS4_MAX_UINT64 || end1 > start2) && |
| 408 | (end2 == NFS4_MAX_UINT64 || end2 > start1); |
| 409 | } |
| 410 | |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 411 | static bool |
Benny Halevy | 778b550 | 2011-05-22 19:48:02 +0300 | [diff] [blame] | 412 | should_free_lseg(struct pnfs_layout_range *lseg_range, |
| 413 | struct pnfs_layout_range *recall_range) |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 414 | { |
Benny Halevy | 778b550 | 2011-05-22 19:48:02 +0300 | [diff] [blame] | 415 | return (recall_range->iomode == IOMODE_ANY || |
| 416 | lseg_range->iomode == recall_range->iomode) && |
| 417 | lo_seg_intersecting(lseg_range, recall_range); |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 418 | } |
| 419 | |
Trond Myklebust | 2495680 | 2013-03-20 13:03:00 -0400 | [diff] [blame^] | 420 | static bool pnfs_lseg_dec_and_remove_zero(struct pnfs_layout_segment *lseg, |
| 421 | struct list_head *tmp_list) |
| 422 | { |
| 423 | if (!atomic_dec_and_test(&lseg->pls_refcount)) |
| 424 | return false; |
| 425 | pnfs_layout_remove_lseg(lseg->pls_layout, lseg); |
| 426 | list_add(&lseg->pls_list, tmp_list); |
| 427 | return true; |
| 428 | } |
| 429 | |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 430 | /* Returns 1 if lseg is removed from list, 0 otherwise */ |
| 431 | static int mark_lseg_invalid(struct pnfs_layout_segment *lseg, |
| 432 | struct list_head *tmp_list) |
| 433 | { |
| 434 | int rv = 0; |
| 435 | |
| 436 | if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { |
| 437 | /* Remove the reference keeping the lseg in the |
| 438 | * list. It will now be removed when all |
| 439 | * outstanding io is finished. |
| 440 | */ |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 441 | dprintk("%s: lseg %p ref %d\n", __func__, lseg, |
| 442 | atomic_read(&lseg->pls_refcount)); |
Trond Myklebust | 2495680 | 2013-03-20 13:03:00 -0400 | [diff] [blame^] | 443 | if (pnfs_lseg_dec_and_remove_zero(lseg, tmp_list)) |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 444 | rv = 1; |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 445 | } |
| 446 | return rv; |
| 447 | } |
| 448 | |
| 449 | /* Returns count of number of matching invalid lsegs remaining in list |
| 450 | * after call. |
| 451 | */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 452 | int |
Trond Myklebust | 49a8506 | 2012-09-18 20:43:31 -0400 | [diff] [blame] | 453 | pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 454 | struct list_head *tmp_list, |
Benny Halevy | 778b550 | 2011-05-22 19:48:02 +0300 | [diff] [blame] | 455 | struct pnfs_layout_range *recall_range) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 456 | { |
| 457 | struct pnfs_layout_segment *lseg, *next; |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 458 | int invalid = 0, removed = 0; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 459 | |
| 460 | dprintk("%s:Begin lo %p\n", __func__, lo); |
| 461 | |
Trond Myklebust | 8006bfb | 2012-09-21 14:48:04 -0400 | [diff] [blame] | 462 | if (list_empty(&lo->plh_segs)) |
Fred Isaman | 3851172 | 2011-02-03 18:28:50 +0000 | [diff] [blame] | 463 | return 0; |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 464 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
Benny Halevy | 778b550 | 2011-05-22 19:48:02 +0300 | [diff] [blame] | 465 | if (!recall_range || |
| 466 | should_free_lseg(&lseg->pls_range, recall_range)) { |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 467 | dprintk("%s: freeing lseg %p iomode %d " |
| 468 | "offset %llu length %llu\n", __func__, |
| 469 | lseg, lseg->pls_range.iomode, lseg->pls_range.offset, |
| 470 | lseg->pls_range.length); |
| 471 | invalid++; |
| 472 | removed += mark_lseg_invalid(lseg, tmp_list); |
| 473 | } |
| 474 | dprintk("%s:Return %i\n", __func__, invalid - removed); |
| 475 | return invalid - removed; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 476 | } |
| 477 | |
Fred Isaman | f49f9ba | 2011-02-03 18:28:52 +0000 | [diff] [blame] | 478 | /* note free_me must contain lsegs from a single layout_hdr */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 479 | void |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 480 | pnfs_free_lseg_list(struct list_head *free_me) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 481 | { |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 482 | struct pnfs_layout_segment *lseg, *tmp; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 483 | |
Fred Isaman | f49f9ba | 2011-02-03 18:28:52 +0000 | [diff] [blame] | 484 | if (list_empty(free_me)) |
| 485 | return; |
| 486 | |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 487 | list_for_each_entry_safe(lseg, tmp, free_me, pls_list) { |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 488 | list_del(&lseg->pls_list); |
Trond Myklebust | 905ca19 | 2012-09-20 20:46:49 -0400 | [diff] [blame] | 489 | pnfs_free_lseg(lseg); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 490 | } |
| 491 | } |
| 492 | |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 493 | void |
| 494 | pnfs_destroy_layout(struct nfs_inode *nfsi) |
| 495 | { |
| 496 | struct pnfs_layout_hdr *lo; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 497 | LIST_HEAD(tmp_list); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 498 | |
| 499 | spin_lock(&nfsi->vfs_inode.i_lock); |
| 500 | lo = nfsi->layout; |
| 501 | if (lo) { |
Fred Isaman | 3851172 | 2011-02-03 18:28:50 +0000 | [diff] [blame] | 502 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ |
Trond Myklebust | 49a8506 | 2012-09-18 20:43:31 -0400 | [diff] [blame] | 503 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 504 | pnfs_get_layout_hdr(lo); |
| 505 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED); |
| 506 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED); |
| 507 | spin_unlock(&nfsi->vfs_inode.i_lock); |
| 508 | pnfs_free_lseg_list(&tmp_list); |
| 509 | pnfs_put_layout_hdr(lo); |
| 510 | } else |
| 511 | spin_unlock(&nfsi->vfs_inode.i_lock); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 512 | } |
Andy Adamson | 041245c | 2012-04-27 17:53:53 -0400 | [diff] [blame] | 513 | EXPORT_SYMBOL_GPL(pnfs_destroy_layout); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 514 | |
Trond Myklebust | fd9a8d7 | 2013-02-12 09:48:42 -0500 | [diff] [blame] | 515 | static bool |
| 516 | pnfs_layout_add_bulk_destroy_list(struct inode *inode, |
| 517 | struct list_head *layout_list) |
| 518 | { |
| 519 | struct pnfs_layout_hdr *lo; |
| 520 | bool ret = false; |
| 521 | |
| 522 | spin_lock(&inode->i_lock); |
| 523 | lo = NFS_I(inode)->layout; |
| 524 | if (lo != NULL && list_empty(&lo->plh_bulk_destroy)) { |
| 525 | pnfs_get_layout_hdr(lo); |
| 526 | list_add(&lo->plh_bulk_destroy, layout_list); |
| 527 | ret = true; |
| 528 | } |
| 529 | spin_unlock(&inode->i_lock); |
| 530 | return ret; |
| 531 | } |
| 532 | |
| 533 | /* Caller must hold rcu_read_lock and clp->cl_lock */ |
| 534 | static int |
| 535 | pnfs_layout_bulk_destroy_byserver_locked(struct nfs_client *clp, |
| 536 | struct nfs_server *server, |
| 537 | struct list_head *layout_list) |
| 538 | { |
| 539 | struct pnfs_layout_hdr *lo, *next; |
| 540 | struct inode *inode; |
| 541 | |
| 542 | list_for_each_entry_safe(lo, next, &server->layouts, plh_layouts) { |
| 543 | inode = igrab(lo->plh_inode); |
| 544 | if (inode == NULL) |
| 545 | continue; |
| 546 | list_del_init(&lo->plh_layouts); |
| 547 | if (pnfs_layout_add_bulk_destroy_list(inode, layout_list)) |
| 548 | continue; |
| 549 | rcu_read_unlock(); |
| 550 | spin_unlock(&clp->cl_lock); |
| 551 | iput(inode); |
| 552 | spin_lock(&clp->cl_lock); |
| 553 | rcu_read_lock(); |
| 554 | return -EAGAIN; |
| 555 | } |
| 556 | return 0; |
| 557 | } |
| 558 | |
| 559 | static int |
| 560 | pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list, |
| 561 | bool is_bulk_recall) |
| 562 | { |
| 563 | struct pnfs_layout_hdr *lo; |
| 564 | struct inode *inode; |
| 565 | struct pnfs_layout_range range = { |
| 566 | .iomode = IOMODE_ANY, |
| 567 | .offset = 0, |
| 568 | .length = NFS4_MAX_UINT64, |
| 569 | }; |
| 570 | LIST_HEAD(lseg_list); |
| 571 | int ret = 0; |
| 572 | |
| 573 | while (!list_empty(layout_list)) { |
| 574 | lo = list_entry(layout_list->next, struct pnfs_layout_hdr, |
| 575 | plh_bulk_destroy); |
| 576 | dprintk("%s freeing layout for inode %lu\n", __func__, |
| 577 | lo->plh_inode->i_ino); |
| 578 | inode = lo->plh_inode; |
| 579 | spin_lock(&inode->i_lock); |
| 580 | list_del_init(&lo->plh_bulk_destroy); |
| 581 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ |
| 582 | if (is_bulk_recall) |
| 583 | set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); |
| 584 | if (pnfs_mark_matching_lsegs_invalid(lo, &lseg_list, &range)) |
| 585 | ret = -EAGAIN; |
| 586 | spin_unlock(&inode->i_lock); |
| 587 | pnfs_free_lseg_list(&lseg_list); |
| 588 | pnfs_put_layout_hdr(lo); |
| 589 | iput(inode); |
| 590 | } |
| 591 | return ret; |
| 592 | } |
| 593 | |
| 594 | int |
| 595 | pnfs_destroy_layouts_byfsid(struct nfs_client *clp, |
| 596 | struct nfs_fsid *fsid, |
| 597 | bool is_recall) |
| 598 | { |
| 599 | struct nfs_server *server; |
| 600 | LIST_HEAD(layout_list); |
| 601 | |
| 602 | spin_lock(&clp->cl_lock); |
| 603 | rcu_read_lock(); |
| 604 | restart: |
| 605 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 606 | if (memcmp(&server->fsid, fsid, sizeof(*fsid)) != 0) |
| 607 | continue; |
| 608 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, |
| 609 | server, |
| 610 | &layout_list) != 0) |
| 611 | goto restart; |
| 612 | } |
| 613 | rcu_read_unlock(); |
| 614 | spin_unlock(&clp->cl_lock); |
| 615 | |
| 616 | if (list_empty(&layout_list)) |
| 617 | return 0; |
| 618 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); |
| 619 | } |
| 620 | |
| 621 | int |
| 622 | pnfs_destroy_layouts_byclid(struct nfs_client *clp, |
| 623 | bool is_recall) |
| 624 | { |
| 625 | struct nfs_server *server; |
| 626 | LIST_HEAD(layout_list); |
| 627 | |
| 628 | spin_lock(&clp->cl_lock); |
| 629 | rcu_read_lock(); |
| 630 | restart: |
| 631 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 632 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, |
| 633 | server, |
| 634 | &layout_list) != 0) |
| 635 | goto restart; |
| 636 | } |
| 637 | rcu_read_unlock(); |
| 638 | spin_unlock(&clp->cl_lock); |
| 639 | |
| 640 | if (list_empty(&layout_list)) |
| 641 | return 0; |
| 642 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); |
| 643 | } |
| 644 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 645 | /* |
| 646 | * Called by the state manger to remove all layouts established under an |
| 647 | * expired lease. |
| 648 | */ |
| 649 | void |
| 650 | pnfs_destroy_all_layouts(struct nfs_client *clp) |
| 651 | { |
Andy Adamson | c47abcf | 2011-06-15 17:52:40 -0400 | [diff] [blame] | 652 | nfs4_deviceid_mark_client_invalid(clp); |
| 653 | nfs4_deviceid_purge_client(clp); |
| 654 | |
Trond Myklebust | fd9a8d7 | 2013-02-12 09:48:42 -0500 | [diff] [blame] | 655 | pnfs_destroy_layouts_byclid(clp, false); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 656 | } |
| 657 | |
Trond Myklebust | 5a65503 | 2012-10-02 16:47:14 -0700 | [diff] [blame] | 658 | /* |
| 659 | * Compare 2 layout stateid sequence ids, to see which is newer, |
| 660 | * taking into account wraparound issues. |
| 661 | */ |
| 662 | static bool pnfs_seqid_is_newer(u32 s1, u32 s2) |
| 663 | { |
| 664 | return (s32)s1 - (s32)s2 > 0; |
| 665 | } |
| 666 | |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 667 | /* update lo->plh_stateid with new if is more recent */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 668 | void |
| 669 | pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new, |
| 670 | bool update_barrier) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 671 | { |
Trond Myklebust | 22aaf71 | 2012-10-04 16:32:22 -0700 | [diff] [blame] | 672 | u32 oldseq, newseq, new_barrier; |
| 673 | int empty = list_empty(&lo->plh_segs); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 674 | |
Trond Myklebust | 2d2f24a | 2012-03-04 18:13:57 -0500 | [diff] [blame] | 675 | oldseq = be32_to_cpu(lo->plh_stateid.seqid); |
| 676 | newseq = be32_to_cpu(new->seqid); |
Trond Myklebust | 22aaf71 | 2012-10-04 16:32:22 -0700 | [diff] [blame] | 677 | if (empty || pnfs_seqid_is_newer(newseq, oldseq)) { |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 678 | nfs4_stateid_copy(&lo->plh_stateid, new); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 679 | if (update_barrier) { |
Trond Myklebust | 22aaf71 | 2012-10-04 16:32:22 -0700 | [diff] [blame] | 680 | new_barrier = be32_to_cpu(new->seqid); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 681 | } else { |
| 682 | /* Because of wraparound, we want to keep the barrier |
Trond Myklebust | 22aaf71 | 2012-10-04 16:32:22 -0700 | [diff] [blame] | 683 | * "close" to the current seqids. |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 684 | */ |
Trond Myklebust | 22aaf71 | 2012-10-04 16:32:22 -0700 | [diff] [blame] | 685 | new_barrier = newseq - atomic_read(&lo->plh_outstanding); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 686 | } |
Trond Myklebust | 22aaf71 | 2012-10-04 16:32:22 -0700 | [diff] [blame] | 687 | if (empty || pnfs_seqid_is_newer(new_barrier, lo->plh_barrier)) |
| 688 | lo->plh_barrier = new_barrier; |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 689 | } |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 690 | } |
| 691 | |
Trond Myklebust | 19c54ab | 2012-10-05 16:56:58 -0700 | [diff] [blame] | 692 | static bool |
| 693 | pnfs_layout_stateid_blocked(const struct pnfs_layout_hdr *lo, |
| 694 | const nfs4_stateid *stateid) |
| 695 | { |
| 696 | u32 seqid = be32_to_cpu(stateid->seqid); |
| 697 | |
| 698 | return !pnfs_seqid_is_newer(seqid, lo->plh_barrier); |
| 699 | } |
| 700 | |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 701 | /* lget is set to 1 if called from inside send_layoutget call chain */ |
| 702 | static bool |
Trond Myklebust | 19c54ab | 2012-10-05 16:56:58 -0700 | [diff] [blame] | 703 | pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo, int lget) |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 704 | { |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 705 | return lo->plh_block_lgets || |
| 706 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 707 | (list_empty(&lo->plh_segs) && |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 708 | (atomic_read(&lo->plh_outstanding) > lget)); |
| 709 | } |
| 710 | |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 711 | int |
| 712 | pnfs_choose_layoutget_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo, |
| 713 | struct nfs4_state *open_state) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 714 | { |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 715 | int status = 0; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 716 | |
| 717 | dprintk("--> %s\n", __func__); |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 718 | spin_lock(&lo->plh_inode->i_lock); |
Trond Myklebust | 19c54ab | 2012-10-05 16:56:58 -0700 | [diff] [blame] | 719 | if (pnfs_layoutgets_blocked(lo, 1)) { |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 720 | status = -EAGAIN; |
| 721 | } else if (list_empty(&lo->plh_segs)) { |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 722 | int seq; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 723 | |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 724 | do { |
| 725 | seq = read_seqbegin(&open_state->seqlock); |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 726 | nfs4_stateid_copy(dst, &open_state->stateid); |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 727 | } while (read_seqretry(&open_state->seqlock, seq)); |
| 728 | } else |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 729 | nfs4_stateid_copy(dst, &lo->plh_stateid); |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 730 | spin_unlock(&lo->plh_inode->i_lock); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 731 | dprintk("<-- %s\n", __func__); |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 732 | return status; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 733 | } |
| 734 | |
| 735 | /* |
| 736 | * Get layout from server. |
| 737 | * for now, assume that whole file layouts are requested. |
| 738 | * arg->offset: 0 |
| 739 | * arg->length: all ones |
| 740 | */ |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 741 | static struct pnfs_layout_segment * |
| 742 | send_layoutget(struct pnfs_layout_hdr *lo, |
| 743 | struct nfs_open_context *ctx, |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 744 | struct pnfs_layout_range *range, |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 745 | gfp_t gfp_flags) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 746 | { |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 747 | struct inode *ino = lo->plh_inode; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 748 | struct nfs_server *server = NFS_SERVER(ino); |
| 749 | struct nfs4_layoutget *lgp; |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 750 | struct pnfs_layout_segment *lseg; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 751 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 752 | dprintk("--> %s\n", __func__); |
| 753 | |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 754 | lgp = kzalloc(sizeof(*lgp), gfp_flags); |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 755 | if (lgp == NULL) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 756 | return NULL; |
Weston Andros Adamson | 35124a0 | 2011-03-24 16:48:21 -0400 | [diff] [blame] | 757 | |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 758 | lgp->args.minlength = PAGE_CACHE_SIZE; |
| 759 | if (lgp->args.minlength > range->length) |
| 760 | lgp->args.minlength = range->length; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 761 | lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE; |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 762 | lgp->args.range = *range; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 763 | lgp->args.type = server->pnfs_curr_ld->id; |
| 764 | lgp->args.inode = ino; |
| 765 | lgp->args.ctx = get_nfs_open_context(ctx); |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 766 | lgp->gfp_flags = gfp_flags; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 767 | |
| 768 | /* Synchronously retrieve layout information from server and |
| 769 | * store in lseg. |
| 770 | */ |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 771 | lseg = nfs4_proc_layoutget(lgp, gfp_flags); |
| 772 | if (IS_ERR(lseg)) { |
| 773 | switch (PTR_ERR(lseg)) { |
| 774 | case -ENOMEM: |
| 775 | case -ERESTARTSYS: |
| 776 | break; |
| 777 | default: |
| 778 | /* remember that LAYOUTGET failed and suspend trying */ |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 779 | pnfs_layout_io_set_failed(lo, range->iomode); |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 780 | } |
| 781 | return NULL; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 782 | } |
Weston Andros Adamson | 35124a0 | 2011-03-24 16:48:21 -0400 | [diff] [blame] | 783 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 784 | return lseg; |
| 785 | } |
| 786 | |
Trond Myklebust | 2495680 | 2013-03-20 13:03:00 -0400 | [diff] [blame^] | 787 | static void pnfs_clear_layoutcommit(struct inode *inode, |
| 788 | struct list_head *head) |
| 789 | { |
| 790 | struct nfs_inode *nfsi = NFS_I(inode); |
| 791 | struct pnfs_layout_segment *lseg, *tmp; |
| 792 | |
| 793 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
| 794 | return; |
| 795 | list_for_each_entry_safe(lseg, tmp, &nfsi->layout->plh_segs, pls_list) { |
| 796 | if (!test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) |
| 797 | continue; |
| 798 | pnfs_lseg_dec_and_remove_zero(lseg, head); |
| 799 | } |
| 800 | } |
| 801 | |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 802 | /* |
| 803 | * Initiates a LAYOUTRETURN(FILE), and removes the pnfs_layout_hdr |
| 804 | * when the layout segment list is empty. |
| 805 | * |
| 806 | * Note that a pnfs_layout_hdr can exist with an empty layout segment |
| 807 | * list when LAYOUTGET has failed, or when LAYOUTGET succeeded, but the |
| 808 | * deviceid is marked invalid. |
| 809 | */ |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 810 | int |
| 811 | _pnfs_return_layout(struct inode *ino) |
| 812 | { |
| 813 | struct pnfs_layout_hdr *lo = NULL; |
| 814 | struct nfs_inode *nfsi = NFS_I(ino); |
| 815 | LIST_HEAD(tmp_list); |
| 816 | struct nfs4_layoutreturn *lrp; |
| 817 | nfs4_stateid stateid; |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 818 | int status = 0, empty; |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 819 | |
Andy Adamson | 366d505 | 2012-06-20 15:03:33 -0400 | [diff] [blame] | 820 | dprintk("NFS: %s for inode %lu\n", __func__, ino->i_ino); |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 821 | |
| 822 | spin_lock(&ino->i_lock); |
| 823 | lo = nfsi->layout; |
Trond Myklebust | e5929f3 | 2012-09-21 16:37:02 -0400 | [diff] [blame] | 824 | if (!lo) { |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 825 | spin_unlock(&ino->i_lock); |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 826 | dprintk("NFS: %s no layout to return\n", __func__); |
| 827 | goto out; |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 828 | } |
| 829 | stateid = nfsi->layout->plh_stateid; |
| 830 | /* Reference matched in nfs4_layoutreturn_release */ |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 831 | pnfs_get_layout_hdr(lo); |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 832 | empty = list_empty(&lo->plh_segs); |
Trond Myklebust | 2495680 | 2013-03-20 13:03:00 -0400 | [diff] [blame^] | 833 | pnfs_clear_layoutcommit(ino, &tmp_list); |
Trond Myklebust | 49a8506 | 2012-09-18 20:43:31 -0400 | [diff] [blame] | 834 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 835 | /* Don't send a LAYOUTRETURN if list was initially empty */ |
| 836 | if (empty) { |
| 837 | spin_unlock(&ino->i_lock); |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 838 | pnfs_put_layout_hdr(lo); |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 839 | dprintk("NFS: %s no layout segments to return\n", __func__); |
| 840 | goto out; |
| 841 | } |
Fred Isaman | ea0ded7 | 2011-06-15 12:31:02 -0400 | [diff] [blame] | 842 | lo->plh_block_lgets++; |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 843 | spin_unlock(&ino->i_lock); |
| 844 | pnfs_free_lseg_list(&tmp_list); |
| 845 | |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 846 | lrp = kzalloc(sizeof(*lrp), GFP_KERNEL); |
| 847 | if (unlikely(lrp == NULL)) { |
| 848 | status = -ENOMEM; |
Trond Myklebust | 65857d5 | 2012-09-24 13:49:27 -0400 | [diff] [blame] | 849 | spin_lock(&ino->i_lock); |
| 850 | lo->plh_block_lgets--; |
| 851 | spin_unlock(&ino->i_lock); |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 852 | pnfs_put_layout_hdr(lo); |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 853 | goto out; |
| 854 | } |
| 855 | |
| 856 | lrp->args.stateid = stateid; |
| 857 | lrp->args.layout_type = NFS_SERVER(ino)->pnfs_curr_ld->id; |
| 858 | lrp->args.inode = ino; |
Trond Myklebust | a56aaa0 | 2011-06-15 11:59:10 -0400 | [diff] [blame] | 859 | lrp->args.layout = lo; |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 860 | lrp->clp = NFS_SERVER(ino)->nfs_client; |
| 861 | |
| 862 | status = nfs4_proc_layoutreturn(lrp); |
| 863 | out: |
| 864 | dprintk("<-- %s status: %d\n", __func__, status); |
| 865 | return status; |
| 866 | } |
Andy Adamson | 0a57cda | 2012-04-27 17:53:50 -0400 | [diff] [blame] | 867 | EXPORT_SYMBOL_GPL(_pnfs_return_layout); |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 868 | |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 869 | bool pnfs_roc(struct inode *ino) |
| 870 | { |
| 871 | struct pnfs_layout_hdr *lo; |
| 872 | struct pnfs_layout_segment *lseg, *tmp; |
| 873 | LIST_HEAD(tmp_list); |
| 874 | bool found = false; |
| 875 | |
| 876 | spin_lock(&ino->i_lock); |
| 877 | lo = NFS_I(ino)->layout; |
| 878 | if (!lo || !test_and_clear_bit(NFS_LAYOUT_ROC, &lo->plh_flags) || |
| 879 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) |
| 880 | goto out_nolayout; |
| 881 | list_for_each_entry_safe(lseg, tmp, &lo->plh_segs, pls_list) |
| 882 | if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { |
| 883 | mark_lseg_invalid(lseg, &tmp_list); |
| 884 | found = true; |
| 885 | } |
| 886 | if (!found) |
| 887 | goto out_nolayout; |
| 888 | lo->plh_block_lgets++; |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 889 | pnfs_get_layout_hdr(lo); /* matched in pnfs_roc_release */ |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 890 | spin_unlock(&ino->i_lock); |
| 891 | pnfs_free_lseg_list(&tmp_list); |
| 892 | return true; |
| 893 | |
| 894 | out_nolayout: |
| 895 | spin_unlock(&ino->i_lock); |
| 896 | return false; |
| 897 | } |
| 898 | |
| 899 | void pnfs_roc_release(struct inode *ino) |
| 900 | { |
| 901 | struct pnfs_layout_hdr *lo; |
| 902 | |
| 903 | spin_lock(&ino->i_lock); |
| 904 | lo = NFS_I(ino)->layout; |
| 905 | lo->plh_block_lgets--; |
Trond Myklebust | 6622c3e | 2012-09-20 17:23:11 -0400 | [diff] [blame] | 906 | if (atomic_dec_and_test(&lo->plh_refcount)) { |
| 907 | pnfs_detach_layout_hdr(lo); |
| 908 | spin_unlock(&ino->i_lock); |
| 909 | pnfs_free_layout_hdr(lo); |
| 910 | } else |
| 911 | spin_unlock(&ino->i_lock); |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 912 | } |
| 913 | |
| 914 | void pnfs_roc_set_barrier(struct inode *ino, u32 barrier) |
| 915 | { |
| 916 | struct pnfs_layout_hdr *lo; |
| 917 | |
| 918 | spin_lock(&ino->i_lock); |
| 919 | lo = NFS_I(ino)->layout; |
Trond Myklebust | 0f35ad6 | 2012-10-04 16:28:17 -0700 | [diff] [blame] | 920 | if (pnfs_seqid_is_newer(barrier, lo->plh_barrier)) |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 921 | lo->plh_barrier = barrier; |
| 922 | spin_unlock(&ino->i_lock); |
| 923 | } |
| 924 | |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 925 | bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task) |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 926 | { |
| 927 | struct nfs_inode *nfsi = NFS_I(ino); |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 928 | struct pnfs_layout_hdr *lo; |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 929 | struct pnfs_layout_segment *lseg; |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 930 | u32 current_seqid; |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 931 | bool found = false; |
| 932 | |
| 933 | spin_lock(&ino->i_lock); |
| 934 | list_for_each_entry(lseg, &nfsi->layout->plh_segs, pls_list) |
| 935 | if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 936 | rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL); |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 937 | found = true; |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 938 | goto out; |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 939 | } |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 940 | lo = nfsi->layout; |
| 941 | current_seqid = be32_to_cpu(lo->plh_stateid.seqid); |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 942 | |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 943 | /* Since close does not return a layout stateid for use as |
| 944 | * a barrier, we choose the worst-case barrier. |
| 945 | */ |
| 946 | *barrier = current_seqid + atomic_read(&lo->plh_outstanding); |
| 947 | out: |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 948 | spin_unlock(&ino->i_lock); |
| 949 | return found; |
| 950 | } |
| 951 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 952 | /* |
| 953 | * Compare two layout segments for sorting into layout cache. |
| 954 | * We want to preferentially return RW over RO layouts, so ensure those |
| 955 | * are seen first. |
| 956 | */ |
| 957 | static s64 |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 958 | cmp_layout(struct pnfs_layout_range *l1, |
| 959 | struct pnfs_layout_range *l2) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 960 | { |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 961 | s64 d; |
| 962 | |
| 963 | /* high offset > low offset */ |
| 964 | d = l1->offset - l2->offset; |
| 965 | if (d) |
| 966 | return d; |
| 967 | |
| 968 | /* short length > long length */ |
| 969 | d = l2->length - l1->length; |
| 970 | if (d) |
| 971 | return d; |
| 972 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 973 | /* read > read/write */ |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 974 | return (int)(l1->iomode == IOMODE_READ) - (int)(l2->iomode == IOMODE_READ); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 975 | } |
| 976 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 977 | static void |
Trond Myklebust | 57036a3 | 2012-09-20 16:33:30 -0400 | [diff] [blame] | 978 | pnfs_layout_insert_lseg(struct pnfs_layout_hdr *lo, |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 979 | struct pnfs_layout_segment *lseg) |
| 980 | { |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 981 | struct pnfs_layout_segment *lp; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 982 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 983 | dprintk("%s:Begin\n", __func__); |
| 984 | |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 985 | list_for_each_entry(lp, &lo->plh_segs, pls_list) { |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 986 | if (cmp_layout(&lseg->pls_range, &lp->pls_range) > 0) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 987 | continue; |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 988 | list_add_tail(&lseg->pls_list, &lp->pls_list); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 989 | dprintk("%s: inserted lseg %p " |
| 990 | "iomode %d offset %llu length %llu before " |
| 991 | "lp %p iomode %d offset %llu length %llu\n", |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 992 | __func__, lseg, lseg->pls_range.iomode, |
| 993 | lseg->pls_range.offset, lseg->pls_range.length, |
| 994 | lp, lp->pls_range.iomode, lp->pls_range.offset, |
| 995 | lp->pls_range.length); |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 996 | goto out; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 997 | } |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 998 | list_add_tail(&lseg->pls_list, &lo->plh_segs); |
| 999 | dprintk("%s: inserted lseg %p " |
| 1000 | "iomode %d offset %llu length %llu at tail\n", |
| 1001 | __func__, lseg, lseg->pls_range.iomode, |
| 1002 | lseg->pls_range.offset, lseg->pls_range.length); |
| 1003 | out: |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 1004 | pnfs_get_layout_hdr(lo); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 1005 | |
| 1006 | dprintk("%s:Return\n", __func__); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1007 | } |
| 1008 | |
| 1009 | static struct pnfs_layout_hdr * |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 1010 | alloc_init_layout_hdr(struct inode *ino, |
| 1011 | struct nfs_open_context *ctx, |
| 1012 | gfp_t gfp_flags) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1013 | { |
| 1014 | struct pnfs_layout_hdr *lo; |
| 1015 | |
Benny Halevy | 636fb9c | 2011-05-22 19:51:33 +0300 | [diff] [blame] | 1016 | lo = pnfs_alloc_layout_hdr(ino, gfp_flags); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1017 | if (!lo) |
| 1018 | return NULL; |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 1019 | atomic_set(&lo->plh_refcount, 1); |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 1020 | INIT_LIST_HEAD(&lo->plh_layouts); |
| 1021 | INIT_LIST_HEAD(&lo->plh_segs); |
Trond Myklebust | fd9a8d7 | 2013-02-12 09:48:42 -0500 | [diff] [blame] | 1022 | INIT_LIST_HEAD(&lo->plh_bulk_destroy); |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 1023 | lo->plh_inode = ino; |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 1024 | lo->plh_lc_cred = get_rpccred(ctx->state->owner->so_cred); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1025 | return lo; |
| 1026 | } |
| 1027 | |
| 1028 | static struct pnfs_layout_hdr * |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 1029 | pnfs_find_alloc_layout(struct inode *ino, |
| 1030 | struct nfs_open_context *ctx, |
| 1031 | gfp_t gfp_flags) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1032 | { |
| 1033 | struct nfs_inode *nfsi = NFS_I(ino); |
| 1034 | struct pnfs_layout_hdr *new = NULL; |
| 1035 | |
| 1036 | dprintk("%s Begin ino=%p layout=%p\n", __func__, ino, nfsi->layout); |
| 1037 | |
Trond Myklebust | 251ec41 | 2012-10-02 15:41:05 -0700 | [diff] [blame] | 1038 | if (nfsi->layout != NULL) |
| 1039 | goto out_existing; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1040 | spin_unlock(&ino->i_lock); |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 1041 | new = alloc_init_layout_hdr(ino, ctx, gfp_flags); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1042 | spin_lock(&ino->i_lock); |
| 1043 | |
Trond Myklebust | 251ec41 | 2012-10-02 15:41:05 -0700 | [diff] [blame] | 1044 | if (likely(nfsi->layout == NULL)) { /* Won the race? */ |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1045 | nfsi->layout = new; |
Trond Myklebust | 251ec41 | 2012-10-02 15:41:05 -0700 | [diff] [blame] | 1046 | return new; |
Yanchuan Nian | 7175fe9 | 2012-10-31 16:05:48 +0800 | [diff] [blame] | 1047 | } else if (new != NULL) |
| 1048 | pnfs_free_layout_hdr(new); |
Trond Myklebust | 251ec41 | 2012-10-02 15:41:05 -0700 | [diff] [blame] | 1049 | out_existing: |
| 1050 | pnfs_get_layout_hdr(nfsi->layout); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1051 | return nfsi->layout; |
| 1052 | } |
| 1053 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1054 | /* |
| 1055 | * iomode matching rules: |
| 1056 | * iomode lseg match |
| 1057 | * ----- ----- ----- |
| 1058 | * ANY READ true |
| 1059 | * ANY RW true |
| 1060 | * RW READ false |
| 1061 | * RW RW true |
| 1062 | * READ READ true |
| 1063 | * READ RW true |
| 1064 | */ |
| 1065 | static int |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1066 | is_matching_lseg(struct pnfs_layout_range *ls_range, |
| 1067 | struct pnfs_layout_range *range) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1068 | { |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1069 | struct pnfs_layout_range range1; |
| 1070 | |
| 1071 | if ((range->iomode == IOMODE_RW && |
| 1072 | ls_range->iomode != IOMODE_RW) || |
| 1073 | !lo_seg_intersecting(ls_range, range)) |
| 1074 | return 0; |
| 1075 | |
| 1076 | /* range1 covers only the first byte in the range */ |
| 1077 | range1 = *range; |
| 1078 | range1.length = 1; |
| 1079 | return lo_seg_contained(ls_range, &range1); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1080 | } |
| 1081 | |
| 1082 | /* |
| 1083 | * lookup range in layout |
| 1084 | */ |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1085 | static struct pnfs_layout_segment * |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1086 | pnfs_find_lseg(struct pnfs_layout_hdr *lo, |
| 1087 | struct pnfs_layout_range *range) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1088 | { |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1089 | struct pnfs_layout_segment *lseg, *ret = NULL; |
| 1090 | |
| 1091 | dprintk("%s:Begin\n", __func__); |
| 1092 | |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 1093 | list_for_each_entry(lseg, &lo->plh_segs, pls_list) { |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 1094 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) && |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1095 | is_matching_lseg(&lseg->pls_range, range)) { |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1096 | ret = pnfs_get_lseg(lseg); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1097 | break; |
| 1098 | } |
Benny Halevy | d771e3a | 2011-06-14 16:30:16 -0400 | [diff] [blame] | 1099 | if (lseg->pls_range.offset > range->offset) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1100 | break; |
| 1101 | } |
| 1102 | |
| 1103 | dprintk("%s:Return lseg %p ref %d\n", |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 1104 | __func__, ret, ret ? atomic_read(&ret->pls_refcount) : 0); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1105 | return ret; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1106 | } |
| 1107 | |
| 1108 | /* |
Andy Adamson | d23d61c | 2012-05-23 05:02:37 -0400 | [diff] [blame] | 1109 | * Use mdsthreshold hints set at each OPEN to determine if I/O should go |
| 1110 | * to the MDS or over pNFS |
| 1111 | * |
| 1112 | * The nfs_inode read_io and write_io fields are cumulative counters reset |
| 1113 | * when there are no layout segments. Note that in pnfs_update_layout iomode |
| 1114 | * is set to IOMODE_READ for a READ request, and set to IOMODE_RW for a |
| 1115 | * WRITE request. |
| 1116 | * |
| 1117 | * A return of true means use MDS I/O. |
| 1118 | * |
| 1119 | * From rfc 5661: |
| 1120 | * If a file's size is smaller than the file size threshold, data accesses |
| 1121 | * SHOULD be sent to the metadata server. If an I/O request has a length that |
| 1122 | * is below the I/O size threshold, the I/O SHOULD be sent to the metadata |
| 1123 | * server. If both file size and I/O size are provided, the client SHOULD |
| 1124 | * reach or exceed both thresholds before sending its read or write |
| 1125 | * requests to the data server. |
| 1126 | */ |
| 1127 | static bool pnfs_within_mdsthreshold(struct nfs_open_context *ctx, |
| 1128 | struct inode *ino, int iomode) |
| 1129 | { |
| 1130 | struct nfs4_threshold *t = ctx->mdsthreshold; |
| 1131 | struct nfs_inode *nfsi = NFS_I(ino); |
| 1132 | loff_t fsize = i_size_read(ino); |
| 1133 | bool size = false, size_set = false, io = false, io_set = false, ret = false; |
| 1134 | |
| 1135 | if (t == NULL) |
| 1136 | return ret; |
| 1137 | |
| 1138 | dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n", |
| 1139 | __func__, t->bm, t->rd_sz, t->wr_sz, t->rd_io_sz, t->wr_io_sz); |
| 1140 | |
| 1141 | switch (iomode) { |
| 1142 | case IOMODE_READ: |
| 1143 | if (t->bm & THRESHOLD_RD) { |
| 1144 | dprintk("%s fsize %llu\n", __func__, fsize); |
| 1145 | size_set = true; |
| 1146 | if (fsize < t->rd_sz) |
| 1147 | size = true; |
| 1148 | } |
| 1149 | if (t->bm & THRESHOLD_RD_IO) { |
| 1150 | dprintk("%s nfsi->read_io %llu\n", __func__, |
| 1151 | nfsi->read_io); |
| 1152 | io_set = true; |
| 1153 | if (nfsi->read_io < t->rd_io_sz) |
| 1154 | io = true; |
| 1155 | } |
| 1156 | break; |
| 1157 | case IOMODE_RW: |
| 1158 | if (t->bm & THRESHOLD_WR) { |
| 1159 | dprintk("%s fsize %llu\n", __func__, fsize); |
| 1160 | size_set = true; |
| 1161 | if (fsize < t->wr_sz) |
| 1162 | size = true; |
| 1163 | } |
| 1164 | if (t->bm & THRESHOLD_WR_IO) { |
| 1165 | dprintk("%s nfsi->write_io %llu\n", __func__, |
| 1166 | nfsi->write_io); |
| 1167 | io_set = true; |
| 1168 | if (nfsi->write_io < t->wr_io_sz) |
| 1169 | io = true; |
| 1170 | } |
| 1171 | break; |
| 1172 | } |
| 1173 | if (size_set && io_set) { |
| 1174 | if (size && io) |
| 1175 | ret = true; |
| 1176 | } else if (size || io) |
| 1177 | ret = true; |
| 1178 | |
| 1179 | dprintk("<-- %s size %d io %d ret %d\n", __func__, size, io, ret); |
| 1180 | return ret; |
| 1181 | } |
| 1182 | |
| 1183 | /* |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1184 | * Layout segment is retreived from the server if not cached. |
| 1185 | * The appropriate layout segment is referenced and returned to the caller. |
| 1186 | */ |
Andy Adamson | 7c24d94 | 2011-06-13 18:22:38 -0400 | [diff] [blame] | 1187 | struct pnfs_layout_segment * |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1188 | pnfs_update_layout(struct inode *ino, |
| 1189 | struct nfs_open_context *ctx, |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1190 | loff_t pos, |
| 1191 | u64 count, |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 1192 | enum pnfs_iomode iomode, |
| 1193 | gfp_t gfp_flags) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1194 | { |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1195 | struct pnfs_layout_range arg = { |
| 1196 | .iomode = iomode, |
| 1197 | .offset = pos, |
| 1198 | .length = count, |
| 1199 | }; |
Benny Halevy | 707ed5f | 2011-05-22 19:47:46 +0300 | [diff] [blame] | 1200 | unsigned pg_offset; |
Weston Andros Adamson | 6382a44 | 2011-06-01 16:44:44 -0400 | [diff] [blame] | 1201 | struct nfs_server *server = NFS_SERVER(ino); |
| 1202 | struct nfs_client *clp = server->nfs_client; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1203 | struct pnfs_layout_hdr *lo; |
| 1204 | struct pnfs_layout_segment *lseg = NULL; |
Weston Andros Adamson | 3000512 | 2013-02-28 20:30:10 -0500 | [diff] [blame] | 1205 | bool first; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1206 | |
| 1207 | if (!pnfs_enabled_sb(NFS_SERVER(ino))) |
Trond Myklebust | f86bbcf | 2012-09-26 11:21:40 -0400 | [diff] [blame] | 1208 | goto out; |
Andy Adamson | d23d61c | 2012-05-23 05:02:37 -0400 | [diff] [blame] | 1209 | |
| 1210 | if (pnfs_within_mdsthreshold(ctx, ino, iomode)) |
Trond Myklebust | f86bbcf | 2012-09-26 11:21:40 -0400 | [diff] [blame] | 1211 | goto out; |
Andy Adamson | d23d61c | 2012-05-23 05:02:37 -0400 | [diff] [blame] | 1212 | |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1213 | spin_lock(&ino->i_lock); |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 1214 | lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags); |
Trond Myklebust | 830ffb5 | 2012-09-20 21:25:19 -0400 | [diff] [blame] | 1215 | if (lo == NULL) { |
| 1216 | spin_unlock(&ino->i_lock); |
| 1217 | goto out; |
| 1218 | } |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1219 | |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 1220 | /* Do we even need to bother with this? */ |
Trond Myklebust | a59c30a | 2012-03-01 11:17:47 -0500 | [diff] [blame] | 1221 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 1222 | dprintk("%s matches recall, use MDS\n", __func__); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1223 | goto out_unlock; |
| 1224 | } |
| 1225 | |
| 1226 | /* if LAYOUTGET already failed once we don't try again */ |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 1227 | if (pnfs_layout_io_test_failed(lo, iomode)) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1228 | goto out_unlock; |
| 1229 | |
Andy Adamson | 568e8c4 | 2011-03-01 01:34:22 +0000 | [diff] [blame] | 1230 | /* Check to see if the layout for the given range already exists */ |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1231 | lseg = pnfs_find_lseg(lo, &arg); |
Andy Adamson | 568e8c4 | 2011-03-01 01:34:22 +0000 | [diff] [blame] | 1232 | if (lseg) |
| 1233 | goto out_unlock; |
| 1234 | |
Trond Myklebust | 19c54ab | 2012-10-05 16:56:58 -0700 | [diff] [blame] | 1235 | if (pnfs_layoutgets_blocked(lo, 0)) |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 1236 | goto out_unlock; |
| 1237 | atomic_inc(&lo->plh_outstanding); |
| 1238 | |
Weston Andros Adamson | 3000512 | 2013-02-28 20:30:10 -0500 | [diff] [blame] | 1239 | first = list_empty(&lo->plh_layouts) ? true : false; |
Fred Isaman | f49f9ba | 2011-02-03 18:28:52 +0000 | [diff] [blame] | 1240 | spin_unlock(&ino->i_lock); |
Weston Andros Adamson | 3000512 | 2013-02-28 20:30:10 -0500 | [diff] [blame] | 1241 | |
Fred Isaman | f49f9ba | 2011-02-03 18:28:52 +0000 | [diff] [blame] | 1242 | if (first) { |
Fred Isaman | 2130ff6 | 2011-01-06 11:36:26 +0000 | [diff] [blame] | 1243 | /* The lo must be on the clp list if there is any |
| 1244 | * chance of a CB_LAYOUTRECALL(FILE) coming in. |
| 1245 | */ |
| 1246 | spin_lock(&clp->cl_lock); |
Weston Andros Adamson | 6382a44 | 2011-06-01 16:44:44 -0400 | [diff] [blame] | 1247 | list_add_tail(&lo->plh_layouts, &server->layouts); |
Fred Isaman | 2130ff6 | 2011-01-06 11:36:26 +0000 | [diff] [blame] | 1248 | spin_unlock(&clp->cl_lock); |
| 1249 | } |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1250 | |
Benny Halevy | 707ed5f | 2011-05-22 19:47:46 +0300 | [diff] [blame] | 1251 | pg_offset = arg.offset & ~PAGE_CACHE_MASK; |
| 1252 | if (pg_offset) { |
| 1253 | arg.offset -= pg_offset; |
| 1254 | arg.length += pg_offset; |
| 1255 | } |
Andy Adamson | 7c24d94 | 2011-06-13 18:22:38 -0400 | [diff] [blame] | 1256 | if (arg.length != NFS4_MAX_UINT64) |
| 1257 | arg.length = PAGE_CACHE_ALIGN(arg.length); |
Benny Halevy | 707ed5f | 2011-05-22 19:47:46 +0300 | [diff] [blame] | 1258 | |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1259 | lseg = send_layoutget(lo, ctx, &arg, gfp_flags); |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 1260 | atomic_dec(&lo->plh_outstanding); |
Trond Myklebust | 830ffb5 | 2012-09-20 21:25:19 -0400 | [diff] [blame] | 1261 | out_put_layout_hdr: |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 1262 | pnfs_put_layout_hdr(lo); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1263 | out: |
Trond Myklebust | f86bbcf | 2012-09-26 11:21:40 -0400 | [diff] [blame] | 1264 | dprintk("%s: inode %s/%llu pNFS layout segment %s for " |
| 1265 | "(%s, offset: %llu, length: %llu)\n", |
| 1266 | __func__, ino->i_sb->s_id, |
| 1267 | (unsigned long long)NFS_FILEID(ino), |
| 1268 | lseg == NULL ? "not found" : "found", |
| 1269 | iomode==IOMODE_RW ? "read/write" : "read-only", |
| 1270 | (unsigned long long)pos, |
| 1271 | (unsigned long long)count); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1272 | return lseg; |
| 1273 | out_unlock: |
| 1274 | spin_unlock(&ino->i_lock); |
Trond Myklebust | 830ffb5 | 2012-09-20 21:25:19 -0400 | [diff] [blame] | 1275 | goto out_put_layout_hdr; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1276 | } |
Andy Adamson | 7c24d94 | 2011-06-13 18:22:38 -0400 | [diff] [blame] | 1277 | EXPORT_SYMBOL_GPL(pnfs_update_layout); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1278 | |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 1279 | struct pnfs_layout_segment * |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1280 | pnfs_layout_process(struct nfs4_layoutget *lgp) |
| 1281 | { |
| 1282 | struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout; |
| 1283 | struct nfs4_layoutget_res *res = &lgp->res; |
| 1284 | struct pnfs_layout_segment *lseg; |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 1285 | struct inode *ino = lo->plh_inode; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1286 | int status = 0; |
| 1287 | |
| 1288 | /* Inject layout blob into I/O device driver */ |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 1289 | 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] | 1290 | if (!lseg || IS_ERR(lseg)) { |
| 1291 | if (!lseg) |
| 1292 | status = -ENOMEM; |
| 1293 | else |
| 1294 | status = PTR_ERR(lseg); |
| 1295 | dprintk("%s: Could not allocate layout: error %d\n", |
| 1296 | __func__, status); |
| 1297 | goto out; |
| 1298 | } |
| 1299 | |
| 1300 | spin_lock(&ino->i_lock); |
Trond Myklebust | a59c30a | 2012-03-01 11:17:47 -0500 | [diff] [blame] | 1301 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 1302 | dprintk("%s forget reply due to recall\n", __func__); |
| 1303 | goto out_forget_reply; |
| 1304 | } |
| 1305 | |
Trond Myklebust | 19c54ab | 2012-10-05 16:56:58 -0700 | [diff] [blame] | 1306 | if (pnfs_layoutgets_blocked(lo, 1) || |
| 1307 | pnfs_layout_stateid_blocked(lo, &res->stateid)) { |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 1308 | dprintk("%s forget reply due to state\n", __func__); |
| 1309 | goto out_forget_reply; |
| 1310 | } |
Trond Myklebust | 038d649 | 2012-10-02 16:38:41 -0700 | [diff] [blame] | 1311 | |
| 1312 | /* Done processing layoutget. Set the layout stateid */ |
| 1313 | pnfs_set_layout_stateid(lo, &res->stateid, false); |
| 1314 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1315 | init_lseg(lo, lseg); |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 1316 | lseg->pls_range = res->range; |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1317 | pnfs_get_lseg(lseg); |
Trond Myklebust | 57036a3 | 2012-09-20 16:33:30 -0400 | [diff] [blame] | 1318 | pnfs_layout_insert_lseg(lo, lseg); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1319 | |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 1320 | if (res->return_on_close) { |
| 1321 | set_bit(NFS_LSEG_ROC, &lseg->pls_flags); |
| 1322 | set_bit(NFS_LAYOUT_ROC, &lo->plh_flags); |
| 1323 | } |
| 1324 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1325 | spin_unlock(&ino->i_lock); |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 1326 | return lseg; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1327 | out: |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 1328 | return ERR_PTR(status); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 1329 | |
| 1330 | out_forget_reply: |
| 1331 | spin_unlock(&ino->i_lock); |
| 1332 | lseg->pls_layout = lo; |
| 1333 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); |
| 1334 | goto out; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1335 | } |
| 1336 | |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1337 | void |
| 1338 | pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) |
| 1339 | { |
Peng Tao | 1fd937b | 2012-09-25 14:55:57 +0800 | [diff] [blame] | 1340 | u64 rd_size = req->wb_bytes; |
| 1341 | |
Trond Myklebust | bc5a89b | 2012-10-15 14:58:04 -0400 | [diff] [blame] | 1342 | WARN_ON_ONCE(pgio->pg_lseg != NULL); |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1343 | |
Fred Isaman | 1825a0d | 2012-04-20 19:55:31 -0400 | [diff] [blame] | 1344 | if (req->wb_offset != req->wb_pgbase) { |
| 1345 | nfs_pageio_reset_read_mds(pgio); |
| 1346 | return; |
| 1347 | } |
Peng Tao | 1fd937b | 2012-09-25 14:55:57 +0800 | [diff] [blame] | 1348 | |
| 1349 | if (pgio->pg_dreq == NULL) |
| 1350 | rd_size = i_size_read(pgio->pg_inode) - req_offset(req); |
| 1351 | else |
| 1352 | rd_size = nfs_dreq_bytes_left(pgio->pg_dreq); |
| 1353 | |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1354 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
| 1355 | req->wb_context, |
| 1356 | req_offset(req), |
Peng Tao | 1fd937b | 2012-09-25 14:55:57 +0800 | [diff] [blame] | 1357 | rd_size, |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1358 | IOMODE_READ, |
| 1359 | GFP_KERNEL); |
Trond Myklebust | e885de1 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1360 | /* If no lseg, fall back to read through mds */ |
| 1361 | if (pgio->pg_lseg == NULL) |
Trond Myklebust | 1f94535 | 2011-07-13 15:59:57 -0400 | [diff] [blame] | 1362 | nfs_pageio_reset_read_mds(pgio); |
Trond Myklebust | e885de1 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1363 | |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1364 | } |
| 1365 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_read); |
| 1366 | |
| 1367 | void |
Peng Tao | 6296556 | 2012-09-25 14:55:57 +0800 | [diff] [blame] | 1368 | pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, |
| 1369 | struct nfs_page *req, u64 wb_size) |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1370 | { |
Trond Myklebust | bc5a89b | 2012-10-15 14:58:04 -0400 | [diff] [blame] | 1371 | WARN_ON_ONCE(pgio->pg_lseg != NULL); |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1372 | |
Fred Isaman | 1825a0d | 2012-04-20 19:55:31 -0400 | [diff] [blame] | 1373 | if (req->wb_offset != req->wb_pgbase) { |
| 1374 | nfs_pageio_reset_write_mds(pgio); |
| 1375 | return; |
| 1376 | } |
Peng Tao | 6296556 | 2012-09-25 14:55:57 +0800 | [diff] [blame] | 1377 | |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1378 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
| 1379 | req->wb_context, |
| 1380 | req_offset(req), |
Peng Tao | 6296556 | 2012-09-25 14:55:57 +0800 | [diff] [blame] | 1381 | wb_size, |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1382 | IOMODE_RW, |
| 1383 | GFP_NOFS); |
Trond Myklebust | e885de1 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1384 | /* If no lseg, fall back to write through mds */ |
| 1385 | if (pgio->pg_lseg == NULL) |
Trond Myklebust | 1f94535 | 2011-07-13 15:59:57 -0400 | [diff] [blame] | 1386 | nfs_pageio_reset_write_mds(pgio); |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1387 | } |
| 1388 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_write); |
| 1389 | |
Bryan Schumaker | 1abb5088 | 2012-06-20 15:53:47 -0400 | [diff] [blame] | 1390 | void |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1391 | pnfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, struct inode *inode, |
| 1392 | const struct nfs_pgio_completion_ops *compl_ops) |
Trond Myklebust | 1751c36 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1393 | { |
| 1394 | struct nfs_server *server = NFS_SERVER(inode); |
| 1395 | struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; |
| 1396 | |
| 1397 | if (ld == NULL) |
Bryan Schumaker | 1abb5088 | 2012-06-20 15:53:47 -0400 | [diff] [blame] | 1398 | nfs_pageio_init_read(pgio, inode, compl_ops); |
| 1399 | else |
| 1400 | 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] | 1401 | } |
| 1402 | |
Bryan Schumaker | 57208fa | 2012-06-20 15:53:48 -0400 | [diff] [blame] | 1403 | void |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1404 | pnfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, struct inode *inode, |
| 1405 | int ioflags, |
| 1406 | const struct nfs_pgio_completion_ops *compl_ops) |
Trond Myklebust | 1751c36 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1407 | { |
| 1408 | struct nfs_server *server = NFS_SERVER(inode); |
| 1409 | struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; |
| 1410 | |
| 1411 | if (ld == NULL) |
Bryan Schumaker | 57208fa | 2012-06-20 15:53:48 -0400 | [diff] [blame] | 1412 | nfs_pageio_init_write(pgio, inode, ioflags, compl_ops); |
| 1413 | else |
| 1414 | 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] | 1415 | } |
| 1416 | |
| 1417 | bool |
Benny Halevy | dfed206 | 2011-05-25 20:25:22 +0300 | [diff] [blame] | 1418 | pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, |
| 1419 | struct nfs_page *req) |
Fred Isaman | bae724e | 2011-03-01 01:34:15 +0000 | [diff] [blame] | 1420 | { |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1421 | if (pgio->pg_lseg == NULL) |
| 1422 | return nfs_generic_pg_test(pgio, prev, req); |
Benny Halevy | 89a58e3 | 2011-05-25 20:54:40 +0300 | [diff] [blame] | 1423 | |
Trond Myklebust | 19982ba | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1424 | /* |
| 1425 | * Test if a nfs_page is fully contained in the pnfs_layout_range. |
| 1426 | * Note that this test makes several assumptions: |
| 1427 | * - that the previous nfs_page in the struct nfs_pageio_descriptor |
| 1428 | * is known to lie within the range. |
| 1429 | * - that the nfs_page being tested is known to be contiguous with the |
| 1430 | * previous nfs_page. |
| 1431 | * - Layout ranges are page aligned, so we only have to test the |
| 1432 | * start offset of the request. |
| 1433 | * |
| 1434 | * Please also note that 'end_offset' is actually the offset of the |
| 1435 | * first byte that lies outside the pnfs_layout_range. FIXME? |
| 1436 | * |
| 1437 | */ |
| 1438 | return req_offset(req) < end_offset(pgio->pg_lseg->pls_range.offset, |
| 1439 | pgio->pg_lseg->pls_range.length); |
Fred Isaman | bae724e | 2011-03-01 01:34:15 +0000 | [diff] [blame] | 1440 | } |
Benny Halevy | 89a58e3 | 2011-05-25 20:54:40 +0300 | [diff] [blame] | 1441 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_test); |
Fred Isaman | bae724e | 2011-03-01 01:34:15 +0000 | [diff] [blame] | 1442 | |
Andy Adamson | e7dd79af | 2012-04-27 17:53:46 -0400 | [diff] [blame] | 1443 | int pnfs_write_done_resend_to_mds(struct inode *inode, |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1444 | struct list_head *head, |
Benny Halevy | 78f3327 | 2013-02-24 09:55:57 -0500 | [diff] [blame] | 1445 | const struct nfs_pgio_completion_ops *compl_ops, |
| 1446 | struct nfs_direct_req *dreq) |
Trond Myklebust | e2fecb2 | 2012-01-06 08:57:46 -0500 | [diff] [blame] | 1447 | { |
| 1448 | struct nfs_pageio_descriptor pgio; |
| 1449 | LIST_HEAD(failed); |
| 1450 | |
| 1451 | /* Resend all requests through the MDS */ |
Bryan Schumaker | 57208fa | 2012-06-20 15:53:48 -0400 | [diff] [blame] | 1452 | nfs_pageio_init_write(&pgio, inode, FLUSH_STABLE, compl_ops); |
Benny Halevy | 78f3327 | 2013-02-24 09:55:57 -0500 | [diff] [blame] | 1453 | pgio.pg_dreq = dreq; |
Trond Myklebust | e2fecb2 | 2012-01-06 08:57:46 -0500 | [diff] [blame] | 1454 | while (!list_empty(head)) { |
| 1455 | struct nfs_page *req = nfs_list_entry(head->next); |
| 1456 | |
| 1457 | nfs_list_remove_request(req); |
| 1458 | if (!nfs_pageio_add_request(&pgio, req)) |
| 1459 | nfs_list_add_request(req, &failed); |
| 1460 | } |
| 1461 | nfs_pageio_complete(&pgio); |
| 1462 | |
| 1463 | if (!list_empty(&failed)) { |
| 1464 | /* For some reason our attempt to resend pages. Mark the |
| 1465 | * overall send request as having failed, and let |
| 1466 | * nfs_writeback_release_full deal with the error. |
| 1467 | */ |
| 1468 | list_move(&failed, head); |
| 1469 | return -EIO; |
| 1470 | } |
| 1471 | return 0; |
| 1472 | } |
Andy Adamson | e7dd79af | 2012-04-27 17:53:46 -0400 | [diff] [blame] | 1473 | EXPORT_SYMBOL_GPL(pnfs_write_done_resend_to_mds); |
Trond Myklebust | e2fecb2 | 2012-01-06 08:57:46 -0500 | [diff] [blame] | 1474 | |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1475 | static void pnfs_ld_handle_write_error(struct nfs_write_data *data) |
| 1476 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1477 | struct nfs_pgio_header *hdr = data->header; |
| 1478 | |
| 1479 | dprintk("pnfs write error = %d\n", hdr->pnfs_error); |
| 1480 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1481 | PNFS_LAYOUTRET_ON_ERROR) { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1482 | pnfs_return_layout(hdr->inode); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1483 | } |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1484 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
| 1485 | data->task.tk_status = pnfs_write_done_resend_to_mds(hdr->inode, |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1486 | &hdr->pages, |
Benny Halevy | 78f3327 | 2013-02-24 09:55:57 -0500 | [diff] [blame] | 1487 | hdr->completion_ops, |
| 1488 | hdr->dreq); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1489 | } |
| 1490 | |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1491 | /* |
| 1492 | * Called by non rpc-based layout drivers |
| 1493 | */ |
Peng Tao | 8ce160c | 2011-09-22 21:50:14 -0400 | [diff] [blame] | 1494 | void pnfs_ld_write_done(struct nfs_write_data *data) |
Fred Isaman | 94ad1c8 | 2011-03-01 01:34:14 +0000 | [diff] [blame] | 1495 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1496 | struct nfs_pgio_header *hdr = data->header; |
| 1497 | |
| 1498 | if (!hdr->pnfs_error) { |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1499 | pnfs_set_layoutcommit(data); |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1500 | hdr->mds_ops->rpc_call_done(&data->task, data); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1501 | } else |
| 1502 | pnfs_ld_handle_write_error(data); |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1503 | hdr->mds_ops->rpc_release(data); |
Fred Isaman | 44b8379 | 2011-03-03 15:13:44 +0000 | [diff] [blame] | 1504 | } |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1505 | EXPORT_SYMBOL_GPL(pnfs_ld_write_done); |
Fred Isaman | 44b8379 | 2011-03-03 15:13:44 +0000 | [diff] [blame] | 1506 | |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1507 | static void |
| 1508 | pnfs_write_through_mds(struct nfs_pageio_descriptor *desc, |
| 1509 | struct nfs_write_data *data) |
| 1510 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1511 | struct nfs_pgio_header *hdr = data->header; |
| 1512 | |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1513 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
| 1514 | list_splice_tail_init(&hdr->pages, &desc->pg_list); |
| 1515 | nfs_pageio_reset_write_mds(desc); |
| 1516 | desc->pg_recoalesce = 1; |
| 1517 | } |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1518 | nfs_writedata_release(data); |
| 1519 | } |
| 1520 | |
| 1521 | static enum pnfs_try_status |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1522 | pnfs_try_to_write_data(struct nfs_write_data *wdata, |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1523 | const struct rpc_call_ops *call_ops, |
| 1524 | struct pnfs_layout_segment *lseg, |
| 1525 | int how) |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1526 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1527 | struct nfs_pgio_header *hdr = wdata->header; |
| 1528 | struct inode *inode = hdr->inode; |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1529 | enum pnfs_try_status trypnfs; |
| 1530 | struct nfs_server *nfss = NFS_SERVER(inode); |
| 1531 | |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1532 | hdr->mds_ops = call_ops; |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1533 | |
| 1534 | dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__, |
| 1535 | inode->i_ino, wdata->args.count, wdata->args.offset, how); |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1536 | trypnfs = nfss->pnfs_curr_ld->write_pagelist(wdata, how); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1537 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1538 | nfs_inc_stats(inode, NFSIOS_PNFS_WRITE); |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1539 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
| 1540 | return trypnfs; |
| 1541 | } |
| 1542 | |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1543 | static void |
| 1544 | pnfs_do_multiple_writes(struct nfs_pageio_descriptor *desc, struct list_head *head, int how) |
| 1545 | { |
| 1546 | struct nfs_write_data *data; |
| 1547 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
| 1548 | struct pnfs_layout_segment *lseg = desc->pg_lseg; |
| 1549 | |
| 1550 | desc->pg_lseg = NULL; |
| 1551 | while (!list_empty(head)) { |
| 1552 | enum pnfs_try_status trypnfs; |
| 1553 | |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1554 | data = list_first_entry(head, struct nfs_write_data, list); |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1555 | list_del_init(&data->list); |
| 1556 | |
| 1557 | trypnfs = pnfs_try_to_write_data(data, call_ops, lseg, how); |
| 1558 | if (trypnfs == PNFS_NOT_ATTEMPTED) |
| 1559 | pnfs_write_through_mds(desc, data); |
| 1560 | } |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1561 | pnfs_put_lseg(lseg); |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1562 | } |
| 1563 | |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1564 | static void pnfs_writehdr_free(struct nfs_pgio_header *hdr) |
| 1565 | { |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1566 | pnfs_put_lseg(hdr->lseg); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1567 | nfs_writehdr_free(hdr); |
| 1568 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1569 | EXPORT_SYMBOL_GPL(pnfs_writehdr_free); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1570 | |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1571 | int |
| 1572 | pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) |
| 1573 | { |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1574 | struct nfs_write_header *whdr; |
| 1575 | struct nfs_pgio_header *hdr; |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1576 | int ret; |
| 1577 | |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1578 | whdr = nfs_writehdr_alloc(); |
| 1579 | if (!whdr) { |
Trond Myklebust | 9b5415b | 2012-04-27 14:31:47 -0400 | [diff] [blame] | 1580 | desc->pg_completion_ops->error_cleanup(&desc->pg_list); |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1581 | pnfs_put_lseg(desc->pg_lseg); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1582 | desc->pg_lseg = NULL; |
| 1583 | return -ENOMEM; |
| 1584 | } |
| 1585 | hdr = &whdr->header; |
| 1586 | nfs_pgheader_init(desc, hdr, pnfs_writehdr_free); |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1587 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1588 | atomic_inc(&hdr->refcnt); |
| 1589 | ret = nfs_generic_flush(desc, hdr); |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1590 | if (ret != 0) { |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1591 | pnfs_put_lseg(desc->pg_lseg); |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1592 | desc->pg_lseg = NULL; |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1593 | } else |
| 1594 | pnfs_do_multiple_writes(desc, &hdr->rpc_list, desc->pg_ioflags); |
| 1595 | if (atomic_dec_and_test(&hdr->refcnt)) |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1596 | hdr->completion_ops->completion(hdr); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1597 | return ret; |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1598 | } |
| 1599 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages); |
| 1600 | |
Andy Adamson | e7dd79af | 2012-04-27 17:53:46 -0400 | [diff] [blame] | 1601 | int pnfs_read_done_resend_to_mds(struct inode *inode, |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1602 | struct list_head *head, |
Benny Halevy | 78f3327 | 2013-02-24 09:55:57 -0500 | [diff] [blame] | 1603 | const struct nfs_pgio_completion_ops *compl_ops, |
| 1604 | struct nfs_direct_req *dreq) |
Trond Myklebust | 62e4a76 | 2011-11-10 14:30:37 -0500 | [diff] [blame] | 1605 | { |
| 1606 | struct nfs_pageio_descriptor pgio; |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1607 | LIST_HEAD(failed); |
Trond Myklebust | 62e4a76 | 2011-11-10 14:30:37 -0500 | [diff] [blame] | 1608 | |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1609 | /* Resend all requests through the MDS */ |
Bryan Schumaker | 1abb5088 | 2012-06-20 15:53:47 -0400 | [diff] [blame] | 1610 | nfs_pageio_init_read(&pgio, inode, compl_ops); |
Benny Halevy | 78f3327 | 2013-02-24 09:55:57 -0500 | [diff] [blame] | 1611 | pgio.pg_dreq = dreq; |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1612 | while (!list_empty(head)) { |
| 1613 | struct nfs_page *req = nfs_list_entry(head->next); |
Trond Myklebust | 62e4a76 | 2011-11-10 14:30:37 -0500 | [diff] [blame] | 1614 | |
| 1615 | nfs_list_remove_request(req); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1616 | if (!nfs_pageio_add_request(&pgio, req)) |
| 1617 | nfs_list_add_request(req, &failed); |
Trond Myklebust | 62e4a76 | 2011-11-10 14:30:37 -0500 | [diff] [blame] | 1618 | } |
| 1619 | nfs_pageio_complete(&pgio); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1620 | |
| 1621 | if (!list_empty(&failed)) { |
| 1622 | list_move(&failed, head); |
| 1623 | return -EIO; |
| 1624 | } |
| 1625 | return 0; |
| 1626 | } |
Andy Adamson | e7dd79af | 2012-04-27 17:53:46 -0400 | [diff] [blame] | 1627 | EXPORT_SYMBOL_GPL(pnfs_read_done_resend_to_mds); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1628 | |
| 1629 | static void pnfs_ld_handle_read_error(struct nfs_read_data *data) |
| 1630 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1631 | struct nfs_pgio_header *hdr = data->header; |
| 1632 | |
| 1633 | dprintk("pnfs read error = %d\n", hdr->pnfs_error); |
| 1634 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1635 | PNFS_LAYOUTRET_ON_ERROR) { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1636 | pnfs_return_layout(hdr->inode); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1637 | } |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1638 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
| 1639 | data->task.tk_status = pnfs_read_done_resend_to_mds(hdr->inode, |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1640 | &hdr->pages, |
Benny Halevy | 78f3327 | 2013-02-24 09:55:57 -0500 | [diff] [blame] | 1641 | hdr->completion_ops, |
| 1642 | hdr->dreq); |
Trond Myklebust | 62e4a76 | 2011-11-10 14:30:37 -0500 | [diff] [blame] | 1643 | } |
| 1644 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1645 | /* |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1646 | * Called by non rpc-based layout drivers |
| 1647 | */ |
Peng Tao | 9b7eecd | 2011-09-22 21:50:15 -0400 | [diff] [blame] | 1648 | void pnfs_ld_read_done(struct nfs_read_data *data) |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1649 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1650 | struct nfs_pgio_header *hdr = data->header; |
| 1651 | |
| 1652 | if (likely(!hdr->pnfs_error)) { |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1653 | __nfs4_read_done_cb(data); |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1654 | hdr->mds_ops->rpc_call_done(&data->task, data); |
Trond Myklebust | 62e4a76 | 2011-11-10 14:30:37 -0500 | [diff] [blame] | 1655 | } else |
| 1656 | pnfs_ld_handle_read_error(data); |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1657 | hdr->mds_ops->rpc_release(data); |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1658 | } |
| 1659 | EXPORT_SYMBOL_GPL(pnfs_ld_read_done); |
| 1660 | |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1661 | static void |
| 1662 | pnfs_read_through_mds(struct nfs_pageio_descriptor *desc, |
| 1663 | struct nfs_read_data *data) |
| 1664 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1665 | struct nfs_pgio_header *hdr = data->header; |
| 1666 | |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1667 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
| 1668 | list_splice_tail_init(&hdr->pages, &desc->pg_list); |
| 1669 | nfs_pageio_reset_read_mds(desc); |
| 1670 | desc->pg_recoalesce = 1; |
| 1671 | } |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1672 | nfs_readdata_release(data); |
| 1673 | } |
| 1674 | |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1675 | /* |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1676 | * Call the appropriate parallel I/O subsystem read function. |
| 1677 | */ |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1678 | static enum pnfs_try_status |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1679 | pnfs_try_to_read_data(struct nfs_read_data *rdata, |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1680 | const struct rpc_call_ops *call_ops, |
| 1681 | struct pnfs_layout_segment *lseg) |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1682 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1683 | struct nfs_pgio_header *hdr = rdata->header; |
| 1684 | struct inode *inode = hdr->inode; |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1685 | struct nfs_server *nfss = NFS_SERVER(inode); |
| 1686 | enum pnfs_try_status trypnfs; |
| 1687 | |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1688 | hdr->mds_ops = call_ops; |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1689 | |
| 1690 | dprintk("%s: Reading ino:%lu %u@%llu\n", |
| 1691 | __func__, inode->i_ino, rdata->args.count, rdata->args.offset); |
| 1692 | |
| 1693 | trypnfs = nfss->pnfs_curr_ld->read_pagelist(rdata); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1694 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1695 | nfs_inc_stats(inode, NFSIOS_PNFS_READ); |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1696 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
| 1697 | return trypnfs; |
| 1698 | } |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1699 | |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1700 | static void |
| 1701 | pnfs_do_multiple_reads(struct nfs_pageio_descriptor *desc, struct list_head *head) |
| 1702 | { |
| 1703 | struct nfs_read_data *data; |
| 1704 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
| 1705 | struct pnfs_layout_segment *lseg = desc->pg_lseg; |
| 1706 | |
| 1707 | desc->pg_lseg = NULL; |
| 1708 | while (!list_empty(head)) { |
| 1709 | enum pnfs_try_status trypnfs; |
| 1710 | |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1711 | data = list_first_entry(head, struct nfs_read_data, list); |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1712 | list_del_init(&data->list); |
| 1713 | |
| 1714 | trypnfs = pnfs_try_to_read_data(data, call_ops, lseg); |
| 1715 | if (trypnfs == PNFS_NOT_ATTEMPTED) |
| 1716 | pnfs_read_through_mds(desc, data); |
| 1717 | } |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1718 | pnfs_put_lseg(lseg); |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1719 | } |
| 1720 | |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1721 | static void pnfs_readhdr_free(struct nfs_pgio_header *hdr) |
| 1722 | { |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1723 | pnfs_put_lseg(hdr->lseg); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1724 | nfs_readhdr_free(hdr); |
| 1725 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1726 | EXPORT_SYMBOL_GPL(pnfs_readhdr_free); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1727 | |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1728 | int |
| 1729 | pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc) |
| 1730 | { |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1731 | struct nfs_read_header *rhdr; |
| 1732 | struct nfs_pgio_header *hdr; |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1733 | int ret; |
| 1734 | |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1735 | rhdr = nfs_readhdr_alloc(); |
| 1736 | if (!rhdr) { |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1737 | desc->pg_completion_ops->error_cleanup(&desc->pg_list); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1738 | ret = -ENOMEM; |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1739 | pnfs_put_lseg(desc->pg_lseg); |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1740 | desc->pg_lseg = NULL; |
| 1741 | return ret; |
| 1742 | } |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1743 | hdr = &rhdr->header; |
| 1744 | nfs_pgheader_init(desc, hdr, pnfs_readhdr_free); |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1745 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1746 | atomic_inc(&hdr->refcnt); |
| 1747 | ret = nfs_generic_pagein(desc, hdr); |
| 1748 | if (ret != 0) { |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1749 | pnfs_put_lseg(desc->pg_lseg); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1750 | desc->pg_lseg = NULL; |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1751 | } else |
| 1752 | pnfs_do_multiple_reads(desc, &hdr->rpc_list); |
| 1753 | if (atomic_dec_and_test(&hdr->refcnt)) |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1754 | hdr->completion_ops->completion(hdr); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1755 | return ret; |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1756 | } |
| 1757 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_readpages); |
| 1758 | |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1759 | /* |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1760 | * There can be multiple RW segments. |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1761 | */ |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1762 | 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] | 1763 | { |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1764 | struct pnfs_layout_segment *lseg; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1765 | |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1766 | list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) { |
| 1767 | if (lseg->pls_range.iomode == IOMODE_RW && |
Trond Myklebust | a073dbf | 2013-03-20 12:34:32 -0400 | [diff] [blame] | 1768 | test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1769 | list_add(&lseg->pls_lc_list, listp); |
| 1770 | } |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1771 | } |
| 1772 | |
Trond Myklebust | a073dbf | 2013-03-20 12:34:32 -0400 | [diff] [blame] | 1773 | static void pnfs_list_write_lseg_done(struct inode *inode, struct list_head *listp) |
| 1774 | { |
| 1775 | struct pnfs_layout_segment *lseg, *tmp; |
| 1776 | unsigned long *bitlock = &NFS_I(inode)->flags; |
| 1777 | |
| 1778 | /* Matched by references in pnfs_set_layoutcommit */ |
| 1779 | list_for_each_entry_safe(lseg, tmp, listp, pls_lc_list) { |
| 1780 | list_del_init(&lseg->pls_lc_list); |
| 1781 | pnfs_put_lseg(lseg); |
| 1782 | } |
| 1783 | |
| 1784 | clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock); |
| 1785 | smp_mb__after_clear_bit(); |
| 1786 | wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING); |
| 1787 | } |
| 1788 | |
Peng Tao | 1b0ae06 | 2011-09-22 21:50:12 -0400 | [diff] [blame] | 1789 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg) |
| 1790 | { |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 1791 | pnfs_layout_io_set_failed(lseg->pls_layout, lseg->pls_range.iomode); |
Peng Tao | 1b0ae06 | 2011-09-22 21:50:12 -0400 | [diff] [blame] | 1792 | } |
| 1793 | EXPORT_SYMBOL_GPL(pnfs_set_lo_fail); |
| 1794 | |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1795 | void |
| 1796 | pnfs_set_layoutcommit(struct nfs_write_data *wdata) |
| 1797 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1798 | struct nfs_pgio_header *hdr = wdata->header; |
| 1799 | struct inode *inode = hdr->inode; |
| 1800 | struct nfs_inode *nfsi = NFS_I(inode); |
Vitaliy Gusev | 4b8ee2b | 2011-05-20 01:34:46 +0400 | [diff] [blame] | 1801 | loff_t end_pos = wdata->mds_offset + wdata->res.count; |
Weston Andros Adamson | 79a48a1 | 2011-04-13 10:53:51 -0400 | [diff] [blame] | 1802 | bool mark_as_dirty = false; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1803 | |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1804 | spin_lock(&inode->i_lock); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1805 | if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { |
Weston Andros Adamson | 79a48a1 | 2011-04-13 10:53:51 -0400 | [diff] [blame] | 1806 | mark_as_dirty = true; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1807 | dprintk("%s: Set layoutcommit for inode %lu ", |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1808 | __func__, inode->i_ino); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1809 | } |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1810 | if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &hdr->lseg->pls_flags)) { |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1811 | /* references matched in nfs4_layoutcommit_release */ |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1812 | pnfs_get_lseg(hdr->lseg); |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1813 | } |
Peng Tao | acff5880 | 2011-07-30 20:52:31 -0400 | [diff] [blame] | 1814 | if (end_pos > nfsi->layout->plh_lwb) |
| 1815 | nfsi->layout->plh_lwb = end_pos; |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1816 | spin_unlock(&inode->i_lock); |
Peng Tao | acff5880 | 2011-07-30 20:52:31 -0400 | [diff] [blame] | 1817 | dprintk("%s: lseg %p end_pos %llu\n", |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1818 | __func__, hdr->lseg, nfsi->layout->plh_lwb); |
Weston Andros Adamson | 79a48a1 | 2011-04-13 10:53:51 -0400 | [diff] [blame] | 1819 | |
| 1820 | /* if pnfs_layoutcommit_inode() runs between inode locks, the next one |
| 1821 | * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ |
| 1822 | if (mark_as_dirty) |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1823 | mark_inode_dirty_sync(inode); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1824 | } |
| 1825 | EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit); |
| 1826 | |
Andy Adamson | db29c08 | 2011-07-30 20:52:38 -0400 | [diff] [blame] | 1827 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data) |
| 1828 | { |
| 1829 | struct nfs_server *nfss = NFS_SERVER(data->args.inode); |
| 1830 | |
| 1831 | if (nfss->pnfs_curr_ld->cleanup_layoutcommit) |
| 1832 | nfss->pnfs_curr_ld->cleanup_layoutcommit(data); |
Trond Myklebust | a073dbf | 2013-03-20 12:34:32 -0400 | [diff] [blame] | 1833 | pnfs_list_write_lseg_done(data->args.inode, &data->lseg_list); |
Andy Adamson | db29c08 | 2011-07-30 20:52:38 -0400 | [diff] [blame] | 1834 | } |
| 1835 | |
Andy Adamson | de4b15c | 2011-03-12 02:58:09 -0500 | [diff] [blame] | 1836 | /* |
| 1837 | * For the LAYOUT4_NFSV4_1_FILES layout type, NFS_DATA_SYNC WRITEs and |
| 1838 | * NFS_UNSTABLE WRITEs with a COMMIT to data servers must store enough |
| 1839 | * data to disk to allow the server to recover the data if it crashes. |
| 1840 | * LAYOUTCOMMIT is only needed when the NFL4_UFLG_COMMIT_THRU_MDS flag |
| 1841 | * is off, and a COMMIT is sent to a data server, or |
| 1842 | * if WRITEs to a data server return NFS_DATA_SYNC. |
| 1843 | */ |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1844 | int |
Andy Adamson | ef31153 | 2011-03-12 02:58:10 -0500 | [diff] [blame] | 1845 | pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1846 | { |
| 1847 | struct nfs4_layoutcommit_data *data; |
| 1848 | struct nfs_inode *nfsi = NFS_I(inode); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1849 | loff_t end_pos; |
| 1850 | int status = 0; |
| 1851 | |
| 1852 | dprintk("--> %s inode %lu\n", __func__, inode->i_ino); |
| 1853 | |
Andy Adamson | de4b15c | 2011-03-12 02:58:09 -0500 | [diff] [blame] | 1854 | if (!test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
| 1855 | return 0; |
| 1856 | |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1857 | /* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */ |
| 1858 | data = kzalloc(sizeof(*data), GFP_NOFS); |
Andy Adamson | de4b15c | 2011-03-12 02:58:09 -0500 | [diff] [blame] | 1859 | if (!data) { |
Andy Adamson | de4b15c | 2011-03-12 02:58:09 -0500 | [diff] [blame] | 1860 | status = -ENOMEM; |
| 1861 | goto out; |
| 1862 | } |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1863 | |
Peng Tao | 92407e7 | 2011-10-23 20:21:17 -0700 | [diff] [blame] | 1864 | if (!test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
| 1865 | goto out_free; |
| 1866 | |
| 1867 | if (test_and_set_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags)) { |
| 1868 | if (!sync) { |
| 1869 | status = -EAGAIN; |
| 1870 | goto out_free; |
| 1871 | } |
| 1872 | status = wait_on_bit_lock(&nfsi->flags, NFS_INO_LAYOUTCOMMITTING, |
| 1873 | nfs_wait_bit_killable, TASK_KILLABLE); |
| 1874 | if (status) |
| 1875 | goto out_free; |
| 1876 | } |
| 1877 | |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1878 | INIT_LIST_HEAD(&data->lseg_list); |
Andy Adamson | de4b15c | 2011-03-12 02:58:09 -0500 | [diff] [blame] | 1879 | spin_lock(&inode->i_lock); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1880 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { |
Peng Tao | 92407e7 | 2011-10-23 20:21:17 -0700 | [diff] [blame] | 1881 | clear_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1882 | spin_unlock(&inode->i_lock); |
Peng Tao | 92407e7 | 2011-10-23 20:21:17 -0700 | [diff] [blame] | 1883 | wake_up_bit(&nfsi->flags, NFS_INO_LAYOUTCOMMITTING); |
| 1884 | goto out_free; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1885 | } |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1886 | |
| 1887 | pnfs_list_write_lseg(inode, &data->lseg_list); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1888 | |
Peng Tao | acff5880 | 2011-07-30 20:52:31 -0400 | [diff] [blame] | 1889 | end_pos = nfsi->layout->plh_lwb; |
Peng Tao | acff5880 | 2011-07-30 20:52:31 -0400 | [diff] [blame] | 1890 | nfsi->layout->plh_lwb = 0; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1891 | |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 1892 | nfs4_stateid_copy(&data->args.stateid, &nfsi->layout->plh_stateid); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1893 | spin_unlock(&inode->i_lock); |
| 1894 | |
| 1895 | data->args.inode = inode; |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 1896 | data->cred = get_rpccred(nfsi->layout->plh_lc_cred); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1897 | nfs_fattr_init(&data->fattr); |
| 1898 | data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; |
| 1899 | data->res.fattr = &data->fattr; |
| 1900 | data->args.lastbytewritten = end_pos - 1; |
| 1901 | data->res.server = NFS_SERVER(inode); |
| 1902 | |
| 1903 | status = nfs4_proc_layoutcommit(data, sync); |
| 1904 | out: |
Peng Tao | 92407e7 | 2011-10-23 20:21:17 -0700 | [diff] [blame] | 1905 | if (status) |
| 1906 | mark_inode_dirty_sync(inode); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1907 | dprintk("<-- %s status %d\n", __func__, status); |
| 1908 | return status; |
Peng Tao | 92407e7 | 2011-10-23 20:21:17 -0700 | [diff] [blame] | 1909 | out_free: |
| 1910 | kfree(data); |
| 1911 | goto out; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1912 | } |
Andy Adamson | 82be417 | 2012-05-23 05:02:35 -0400 | [diff] [blame] | 1913 | |
| 1914 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) |
| 1915 | { |
| 1916 | struct nfs4_threshold *thp; |
| 1917 | |
| 1918 | thp = kzalloc(sizeof(*thp), GFP_NOFS); |
| 1919 | if (!thp) { |
| 1920 | dprintk("%s mdsthreshold allocation failed\n", __func__); |
| 1921 | return NULL; |
| 1922 | } |
| 1923 | return thp; |
| 1924 | } |