Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 1 | /* |
| 2 | * pNFS functions to call and manage layout drivers. |
| 3 | * |
| 4 | * Copyright (c) 2002 [year of first publication] |
| 5 | * The Regents of the University of Michigan |
| 6 | * All Rights Reserved |
| 7 | * |
| 8 | * Dean Hildebrand <dhildebz@umich.edu> |
| 9 | * |
| 10 | * Permission is granted to use, copy, create derivative works, and |
| 11 | * redistribute this software and such derivative works for any purpose, |
| 12 | * so long as the name of the University of Michigan is not used in |
| 13 | * any advertising or publicity pertaining to the use or distribution |
| 14 | * of this software without specific, written prior authorization. If |
| 15 | * the above copyright notice or any other identification of the |
| 16 | * University of Michigan is included in any copy of any portion of |
| 17 | * this software, then the disclaimer below must also be included. |
| 18 | * |
| 19 | * This software is provided as is, without representation or warranty |
| 20 | * of any kind either express or implied, including without limitation |
| 21 | * the implied warranties of merchantability, fitness for a particular |
| 22 | * purpose, or noninfringement. The Regents of the University of |
| 23 | * Michigan shall not be liable for any damages, including special, |
| 24 | * indirect, incidental, or consequential damages, with respect to any |
| 25 | * claim arising out of or in connection with the use of the software, |
| 26 | * even if it has been or is hereafter advised of the possibility of |
| 27 | * such damages. |
| 28 | */ |
| 29 | |
| 30 | #include <linux/nfs_fs.h> |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 31 | #include <linux/nfs_page.h> |
Paul Gortmaker | 143cb49 | 2011-07-01 14:23:34 -0400 | [diff] [blame] | 32 | #include <linux/module.h> |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 33 | #include "internal.h" |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 34 | #include "pnfs.h" |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 35 | #include "iostat.h" |
Trond Myklebust | cc668ab | 2013-08-14 15:31:28 -0400 | [diff] [blame] | 36 | #include "nfs4trace.h" |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 37 | |
| 38 | #define NFSDBG_FACILITY NFSDBG_PNFS |
Trond Myklebust | 25c7533 | 2012-09-18 17:01:12 -0400 | [diff] [blame] | 39 | #define PNFS_LAYOUTGET_RETRY_TIMEOUT (120*HZ) |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 40 | |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 41 | /* Locking: |
| 42 | * |
| 43 | * pnfs_spinlock: |
| 44 | * protects pnfs_modules_tbl. |
| 45 | */ |
| 46 | static DEFINE_SPINLOCK(pnfs_spinlock); |
| 47 | |
| 48 | /* |
| 49 | * pnfs_modules_tbl holds all pnfs modules |
| 50 | */ |
| 51 | static LIST_HEAD(pnfs_modules_tbl); |
| 52 | |
| 53 | /* Return the registered pnfs layout driver module matching given id */ |
| 54 | static struct pnfs_layoutdriver_type * |
| 55 | find_pnfs_driver_locked(u32 id) |
| 56 | { |
| 57 | struct pnfs_layoutdriver_type *local; |
| 58 | |
| 59 | list_for_each_entry(local, &pnfs_modules_tbl, pnfs_tblid) |
| 60 | if (local->id == id) |
| 61 | goto out; |
| 62 | local = NULL; |
| 63 | out: |
| 64 | dprintk("%s: Searching for id %u, found %p\n", __func__, id, local); |
| 65 | return local; |
| 66 | } |
| 67 | |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 68 | static struct pnfs_layoutdriver_type * |
| 69 | find_pnfs_driver(u32 id) |
| 70 | { |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 71 | struct pnfs_layoutdriver_type *local; |
| 72 | |
| 73 | spin_lock(&pnfs_spinlock); |
| 74 | local = find_pnfs_driver_locked(id); |
Trond Myklebust | 0a9c63f | 2012-06-15 13:02:58 -0400 | [diff] [blame] | 75 | if (local != NULL && !try_module_get(local->owner)) { |
| 76 | dprintk("%s: Could not grab reference on module\n", __func__); |
| 77 | local = NULL; |
| 78 | } |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 79 | spin_unlock(&pnfs_spinlock); |
| 80 | return local; |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 81 | } |
| 82 | |
| 83 | void |
| 84 | unset_pnfs_layoutdriver(struct nfs_server *nfss) |
| 85 | { |
Benny Halevy | 738fd0f3 | 2011-07-30 20:52:36 -0400 | [diff] [blame] | 86 | if (nfss->pnfs_curr_ld) { |
| 87 | if (nfss->pnfs_curr_ld->clear_layoutdriver) |
| 88 | nfss->pnfs_curr_ld->clear_layoutdriver(nfss); |
Trond Myklebust | 2a4c899 | 2012-06-14 13:08:38 -0400 | [diff] [blame] | 89 | /* Decrement the MDS count. Purge the deviceid cache if zero */ |
| 90 | if (atomic_dec_and_test(&nfss->nfs_client->cl_mds_count)) |
| 91 | nfs4_deviceid_purge_client(nfss->nfs_client); |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 92 | module_put(nfss->pnfs_curr_ld->owner); |
Benny Halevy | 738fd0f3 | 2011-07-30 20:52:36 -0400 | [diff] [blame] | 93 | } |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 94 | nfss->pnfs_curr_ld = NULL; |
| 95 | } |
| 96 | |
| 97 | /* |
| 98 | * Try to set the server's pnfs module to the pnfs layout type specified by id. |
| 99 | * Currently only one pNFS layout driver per filesystem is supported. |
| 100 | * |
| 101 | * @id layout type. Zero (illegal layout type) indicates pNFS not in use. |
| 102 | */ |
| 103 | void |
Benny Halevy | 738fd0f3 | 2011-07-30 20:52:36 -0400 | [diff] [blame] | 104 | set_pnfs_layoutdriver(struct nfs_server *server, const struct nfs_fh *mntfh, |
| 105 | u32 id) |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 106 | { |
| 107 | struct pnfs_layoutdriver_type *ld_type = NULL; |
| 108 | |
| 109 | if (id == 0) |
| 110 | goto out_no_driver; |
| 111 | if (!(server->nfs_client->cl_exchange_flags & |
| 112 | (EXCHGID4_FLAG_USE_NON_PNFS | EXCHGID4_FLAG_USE_PNFS_MDS))) { |
Weston Andros Adamson | a030889 | 2012-01-26 13:32:23 -0500 | [diff] [blame] | 113 | printk(KERN_ERR "NFS: %s: id %u cl_exchange_flags 0x%x\n", |
| 114 | __func__, id, server->nfs_client->cl_exchange_flags); |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 115 | goto out_no_driver; |
| 116 | } |
| 117 | ld_type = find_pnfs_driver(id); |
| 118 | if (!ld_type) { |
| 119 | request_module("%s-%u", LAYOUT_NFSV4_1_MODULE_PREFIX, id); |
| 120 | ld_type = find_pnfs_driver(id); |
| 121 | if (!ld_type) { |
| 122 | dprintk("%s: No pNFS module found for %u.\n", |
| 123 | __func__, id); |
| 124 | goto out_no_driver; |
| 125 | } |
| 126 | } |
| 127 | server->pnfs_curr_ld = ld_type; |
Benny Halevy | 738fd0f3 | 2011-07-30 20:52:36 -0400 | [diff] [blame] | 128 | if (ld_type->set_layoutdriver |
| 129 | && ld_type->set_layoutdriver(server, mntfh)) { |
Weston Andros Adamson | a030889 | 2012-01-26 13:32:23 -0500 | [diff] [blame] | 130 | printk(KERN_ERR "NFS: %s: Error initializing pNFS layout " |
| 131 | "driver %u.\n", __func__, id); |
Benny Halevy | 738fd0f3 | 2011-07-30 20:52:36 -0400 | [diff] [blame] | 132 | module_put(ld_type->owner); |
| 133 | goto out_no_driver; |
| 134 | } |
Trond Myklebust | 2a4c899 | 2012-06-14 13:08:38 -0400 | [diff] [blame] | 135 | /* Bump the MDS count */ |
| 136 | atomic_inc(&server->nfs_client->cl_mds_count); |
Christoph Hellwig | ea8eecd | 2011-03-01 01:34:21 +0000 | [diff] [blame] | 137 | |
Ricardo Labiaga | 85e174b | 2010-10-20 00:17:58 -0400 | [diff] [blame] | 138 | dprintk("%s: pNFS module for %u set\n", __func__, id); |
| 139 | return; |
| 140 | |
| 141 | out_no_driver: |
| 142 | dprintk("%s: Using NFSv4 I/O\n", __func__); |
| 143 | server->pnfs_curr_ld = NULL; |
| 144 | } |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 145 | |
| 146 | int |
| 147 | pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *ld_type) |
| 148 | { |
| 149 | int status = -EINVAL; |
| 150 | struct pnfs_layoutdriver_type *tmp; |
| 151 | |
| 152 | if (ld_type->id == 0) { |
Weston Andros Adamson | a030889 | 2012-01-26 13:32:23 -0500 | [diff] [blame] | 153 | printk(KERN_ERR "NFS: %s id 0 is reserved\n", __func__); |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 154 | return status; |
| 155 | } |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 156 | if (!ld_type->alloc_lseg || !ld_type->free_lseg) { |
Weston Andros Adamson | a030889 | 2012-01-26 13:32:23 -0500 | [diff] [blame] | 157 | printk(KERN_ERR "NFS: %s Layout driver must provide " |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 158 | "alloc_lseg and free_lseg.\n", __func__); |
| 159 | return status; |
| 160 | } |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 161 | |
| 162 | spin_lock(&pnfs_spinlock); |
| 163 | tmp = find_pnfs_driver_locked(ld_type->id); |
| 164 | if (!tmp) { |
| 165 | list_add(&ld_type->pnfs_tblid, &pnfs_modules_tbl); |
| 166 | status = 0; |
| 167 | dprintk("%s Registering id:%u name:%s\n", __func__, ld_type->id, |
| 168 | ld_type->name); |
| 169 | } else { |
Weston Andros Adamson | a030889 | 2012-01-26 13:32:23 -0500 | [diff] [blame] | 170 | printk(KERN_ERR "NFS: %s Module with id %d already loaded!\n", |
Fred Isaman | 02c35fc | 2010-10-20 00:17:59 -0400 | [diff] [blame] | 171 | __func__, ld_type->id); |
| 172 | } |
| 173 | spin_unlock(&pnfs_spinlock); |
| 174 | |
| 175 | return status; |
| 176 | } |
| 177 | EXPORT_SYMBOL_GPL(pnfs_register_layoutdriver); |
| 178 | |
| 179 | void |
| 180 | pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *ld_type) |
| 181 | { |
| 182 | dprintk("%s Deregistering id:%u\n", __func__, ld_type->id); |
| 183 | spin_lock(&pnfs_spinlock); |
| 184 | list_del(&ld_type->pnfs_tblid); |
| 185 | spin_unlock(&pnfs_spinlock); |
| 186 | } |
| 187 | EXPORT_SYMBOL_GPL(pnfs_unregister_layoutdriver); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 188 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 189 | /* |
| 190 | * pNFS client layout cache |
| 191 | */ |
| 192 | |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 193 | /* Need to hold i_lock if caller does not already hold reference */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 194 | void |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 195 | pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 196 | { |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 197 | atomic_inc(&lo->plh_refcount); |
| 198 | } |
| 199 | |
Benny Halevy | 636fb9c | 2011-05-22 19:51:33 +0300 | [diff] [blame] | 200 | static struct pnfs_layout_hdr * |
| 201 | pnfs_alloc_layout_hdr(struct inode *ino, gfp_t gfp_flags) |
| 202 | { |
| 203 | struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld; |
Trond Myklebust | 5793427 | 2012-09-20 20:37:23 -0400 | [diff] [blame] | 204 | return ld->alloc_layout_hdr(ino, gfp_flags); |
Benny Halevy | 636fb9c | 2011-05-22 19:51:33 +0300 | [diff] [blame] | 205 | } |
| 206 | |
| 207 | static void |
| 208 | pnfs_free_layout_hdr(struct pnfs_layout_hdr *lo) |
| 209 | { |
Trond Myklebust | 9c62638 | 2012-09-20 17:31:43 -0400 | [diff] [blame] | 210 | struct nfs_server *server = NFS_SERVER(lo->plh_inode); |
| 211 | struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; |
| 212 | |
| 213 | if (!list_empty(&lo->plh_layouts)) { |
| 214 | struct nfs_client *clp = server->nfs_client; |
| 215 | |
| 216 | spin_lock(&clp->cl_lock); |
| 217 | list_del_init(&lo->plh_layouts); |
| 218 | spin_unlock(&clp->cl_lock); |
| 219 | } |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 220 | put_rpccred(lo->plh_lc_cred); |
Trond Myklebust | 5793427 | 2012-09-20 20:37:23 -0400 | [diff] [blame] | 221 | return ld->free_layout_hdr(lo); |
Benny Halevy | 636fb9c | 2011-05-22 19:51:33 +0300 | [diff] [blame] | 222 | } |
| 223 | |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 224 | static void |
Trond Myklebust | 6622c3e | 2012-09-20 17:23:11 -0400 | [diff] [blame] | 225 | pnfs_detach_layout_hdr(struct pnfs_layout_hdr *lo) |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 226 | { |
Trond Myklebust | bb346f6 | 2012-09-20 15:52:13 -0400 | [diff] [blame] | 227 | struct nfs_inode *nfsi = NFS_I(lo->plh_inode); |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 228 | dprintk("%s: freeing layout cache %p\n", __func__, lo); |
Trond Myklebust | bb346f6 | 2012-09-20 15:52:13 -0400 | [diff] [blame] | 229 | nfsi->layout = NULL; |
| 230 | /* Reset MDS Threshold I/O counters */ |
| 231 | nfsi->write_io = 0; |
| 232 | nfsi->read_io = 0; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 233 | } |
| 234 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 235 | void |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 236 | pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 237 | { |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 238 | struct inode *inode = lo->plh_inode; |
| 239 | |
| 240 | if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) { |
Trond Myklebust | 6622c3e | 2012-09-20 17:23:11 -0400 | [diff] [blame] | 241 | pnfs_detach_layout_hdr(lo); |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 242 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 6622c3e | 2012-09-20 17:23:11 -0400 | [diff] [blame] | 243 | pnfs_free_layout_hdr(lo); |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 244 | } |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 245 | } |
| 246 | |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 247 | static int |
| 248 | pnfs_iomode_to_fail_bit(u32 iomode) |
| 249 | { |
| 250 | return iomode == IOMODE_RW ? |
| 251 | NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; |
| 252 | } |
| 253 | |
| 254 | static void |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 255 | 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] | 256 | { |
Trond Myklebust | 25c7533 | 2012-09-18 17:01:12 -0400 | [diff] [blame] | 257 | lo->plh_retry_timestamp = jiffies; |
Yanchuan Nian | 39e88fc | 2013-01-04 20:19:49 +0800 | [diff] [blame] | 258 | if (!test_and_set_bit(fail_bit, &lo->plh_flags)) |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 259 | atomic_inc(&lo->plh_refcount); |
| 260 | } |
| 261 | |
| 262 | static void |
| 263 | pnfs_layout_clear_fail_bit(struct pnfs_layout_hdr *lo, int fail_bit) |
| 264 | { |
| 265 | if (test_and_clear_bit(fail_bit, &lo->plh_flags)) |
| 266 | atomic_dec(&lo->plh_refcount); |
| 267 | } |
| 268 | |
| 269 | static void |
| 270 | pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode) |
| 271 | { |
| 272 | struct inode *inode = lo->plh_inode; |
Trond Myklebust | 115ce57 | 2012-09-20 21:19:43 -0400 | [diff] [blame] | 273 | struct pnfs_layout_range range = { |
| 274 | .iomode = iomode, |
| 275 | .offset = 0, |
| 276 | .length = NFS4_MAX_UINT64, |
| 277 | }; |
| 278 | LIST_HEAD(head); |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 279 | |
| 280 | spin_lock(&inode->i_lock); |
| 281 | pnfs_layout_set_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode)); |
Trond Myklebust | 115ce57 | 2012-09-20 21:19:43 -0400 | [diff] [blame] | 282 | pnfs_mark_matching_lsegs_invalid(lo, &head, &range); |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 283 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 115ce57 | 2012-09-20 21:19:43 -0400 | [diff] [blame] | 284 | pnfs_free_lseg_list(&head); |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 285 | dprintk("%s Setting layout IOMODE_%s fail bit\n", __func__, |
| 286 | iomode == IOMODE_RW ? "RW" : "READ"); |
| 287 | } |
| 288 | |
| 289 | static bool |
| 290 | pnfs_layout_io_test_failed(struct pnfs_layout_hdr *lo, u32 iomode) |
| 291 | { |
Trond Myklebust | 25c7533 | 2012-09-18 17:01:12 -0400 | [diff] [blame] | 292 | unsigned long start, end; |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 293 | int fail_bit = pnfs_iomode_to_fail_bit(iomode); |
| 294 | |
| 295 | if (test_bit(fail_bit, &lo->plh_flags) == 0) |
Trond Myklebust | 25c7533 | 2012-09-18 17:01:12 -0400 | [diff] [blame] | 296 | return false; |
| 297 | end = jiffies; |
| 298 | start = end - PNFS_LAYOUTGET_RETRY_TIMEOUT; |
| 299 | if (!time_in_range(lo->plh_retry_timestamp, start, end)) { |
| 300 | /* It is time to retry the failed layoutgets */ |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 301 | pnfs_layout_clear_fail_bit(lo, fail_bit); |
Trond Myklebust | 25c7533 | 2012-09-18 17:01:12 -0400 | [diff] [blame] | 302 | return false; |
| 303 | } |
| 304 | return true; |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 305 | } |
| 306 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 307 | static void |
| 308 | init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg) |
| 309 | { |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 310 | INIT_LIST_HEAD(&lseg->pls_list); |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 311 | INIT_LIST_HEAD(&lseg->pls_lc_list); |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 312 | atomic_set(&lseg->pls_refcount, 1); |
| 313 | smp_mb(); |
| 314 | set_bit(NFS_LSEG_VALID, &lseg->pls_flags); |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 315 | lseg->pls_layout = lo; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 316 | } |
| 317 | |
Trond Myklebust | 905ca19 | 2012-09-20 20:46:49 -0400 | [diff] [blame] | 318 | static void pnfs_free_lseg(struct pnfs_layout_segment *lseg) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 319 | { |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 320 | struct inode *ino = lseg->pls_layout->plh_inode; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 321 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 322 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 323 | } |
| 324 | |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 325 | static void |
Trond Myklebust | 57036a3 | 2012-09-20 16:33:30 -0400 | [diff] [blame] | 326 | pnfs_layout_remove_lseg(struct pnfs_layout_hdr *lo, |
| 327 | struct pnfs_layout_segment *lseg) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 328 | { |
Trond Myklebust | 57036a3 | 2012-09-20 16:33:30 -0400 | [diff] [blame] | 329 | struct inode *inode = lo->plh_inode; |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 330 | |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 331 | WARN_ON(test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 332 | list_del_init(&lseg->pls_list); |
Trond Myklebust | 8f0d27d | 2012-09-20 20:57:11 -0400 | [diff] [blame] | 333 | /* Matched by pnfs_get_layout_hdr in pnfs_layout_insert_lseg */ |
| 334 | atomic_dec(&lo->plh_refcount); |
Trond Myklebust | 173f77e | 2012-09-21 15:49:42 -0400 | [diff] [blame] | 335 | if (list_empty(&lo->plh_segs)) |
| 336 | clear_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 337 | rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq); |
| 338 | } |
| 339 | |
Fred Isaman | bae724e | 2011-03-01 01:34:15 +0000 | [diff] [blame] | 340 | void |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 341 | pnfs_put_lseg(struct pnfs_layout_segment *lseg) |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 342 | { |
Trond Myklebust | 57036a3 | 2012-09-20 16:33:30 -0400 | [diff] [blame] | 343 | struct pnfs_layout_hdr *lo; |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 344 | struct inode *inode; |
| 345 | |
| 346 | if (!lseg) |
| 347 | return; |
| 348 | |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 349 | dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, |
| 350 | atomic_read(&lseg->pls_refcount), |
| 351 | test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); |
Trond Myklebust | 57036a3 | 2012-09-20 16:33:30 -0400 | [diff] [blame] | 352 | lo = lseg->pls_layout; |
| 353 | inode = lo->plh_inode; |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 354 | if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) { |
Trond Myklebust | 8f0d27d | 2012-09-20 20:57:11 -0400 | [diff] [blame] | 355 | pnfs_get_layout_hdr(lo); |
Trond Myklebust | 57036a3 | 2012-09-20 16:33:30 -0400 | [diff] [blame] | 356 | pnfs_layout_remove_lseg(lo, lseg); |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 357 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 905ca19 | 2012-09-20 20:46:49 -0400 | [diff] [blame] | 358 | pnfs_free_lseg(lseg); |
Trond Myklebust | 8f0d27d | 2012-09-20 20:57:11 -0400 | [diff] [blame] | 359 | pnfs_put_layout_hdr(lo); |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 360 | } |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 361 | } |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 362 | EXPORT_SYMBOL_GPL(pnfs_put_lseg); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 363 | |
Weston Andros Adamson | e6cf82d | 2014-07-17 20:42:18 -0400 | [diff] [blame] | 364 | static void pnfs_put_lseg_async_work(struct work_struct *work) |
| 365 | { |
| 366 | struct pnfs_layout_segment *lseg; |
| 367 | |
| 368 | lseg = container_of(work, struct pnfs_layout_segment, pls_work); |
| 369 | |
| 370 | pnfs_put_lseg(lseg); |
| 371 | } |
| 372 | |
| 373 | void |
| 374 | pnfs_put_lseg_async(struct pnfs_layout_segment *lseg) |
| 375 | { |
| 376 | INIT_WORK(&lseg->pls_work, pnfs_put_lseg_async_work); |
| 377 | schedule_work(&lseg->pls_work); |
| 378 | } |
| 379 | EXPORT_SYMBOL_GPL(pnfs_put_lseg_async); |
| 380 | |
Trond Myklebust | 3cb2df1 | 2013-06-03 11:24:36 -0400 | [diff] [blame] | 381 | static u64 |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 382 | end_offset(u64 start, u64 len) |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 383 | { |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 384 | u64 end; |
| 385 | |
| 386 | end = start + len; |
| 387 | return end >= start ? end : NFS4_MAX_UINT64; |
| 388 | } |
| 389 | |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 390 | /* |
| 391 | * is l2 fully contained in l1? |
| 392 | * start1 end1 |
| 393 | * [----------------------------------) |
| 394 | * start2 end2 |
| 395 | * [----------------) |
| 396 | */ |
Trond Myklebust | 3cb2df1 | 2013-06-03 11:24:36 -0400 | [diff] [blame] | 397 | static bool |
Trond Myklebust | 7dc0ac7 | 2013-06-03 11:30:24 -0400 | [diff] [blame] | 398 | pnfs_lseg_range_contained(const struct pnfs_layout_range *l1, |
Trond Myklebust | 3cb2df1 | 2013-06-03 11:24:36 -0400 | [diff] [blame] | 399 | const struct pnfs_layout_range *l2) |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 400 | { |
| 401 | u64 start1 = l1->offset; |
| 402 | u64 end1 = end_offset(start1, l1->length); |
| 403 | u64 start2 = l2->offset; |
| 404 | u64 end2 = end_offset(start2, l2->length); |
| 405 | |
| 406 | return (start1 <= start2) && (end1 >= end2); |
| 407 | } |
| 408 | |
| 409 | /* |
| 410 | * is l1 and l2 intersecting? |
| 411 | * start1 end1 |
| 412 | * [----------------------------------) |
| 413 | * start2 end2 |
| 414 | * [----------------) |
| 415 | */ |
Trond Myklebust | 3cb2df1 | 2013-06-03 11:24:36 -0400 | [diff] [blame] | 416 | static bool |
Trond Myklebust | 7dc0ac7 | 2013-06-03 11:30:24 -0400 | [diff] [blame] | 417 | pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, |
Trond Myklebust | 3cb2df1 | 2013-06-03 11:24:36 -0400 | [diff] [blame] | 418 | const struct pnfs_layout_range *l2) |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 419 | { |
| 420 | u64 start1 = l1->offset; |
| 421 | u64 end1 = end_offset(start1, l1->length); |
| 422 | u64 start2 = l2->offset; |
| 423 | u64 end2 = end_offset(start2, l2->length); |
| 424 | |
| 425 | return (end1 == NFS4_MAX_UINT64 || end1 > start2) && |
| 426 | (end2 == NFS4_MAX_UINT64 || end2 > start1); |
| 427 | } |
| 428 | |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 429 | static bool |
Trond Myklebust | 3cb2df1 | 2013-06-03 11:24:36 -0400 | [diff] [blame] | 430 | should_free_lseg(const struct pnfs_layout_range *lseg_range, |
| 431 | const struct pnfs_layout_range *recall_range) |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 432 | { |
Benny Halevy | 778b550 | 2011-05-22 19:48:02 +0300 | [diff] [blame] | 433 | return (recall_range->iomode == IOMODE_ANY || |
| 434 | lseg_range->iomode == recall_range->iomode) && |
Trond Myklebust | 7dc0ac7 | 2013-06-03 11:30:24 -0400 | [diff] [blame] | 435 | pnfs_lseg_range_intersecting(lseg_range, recall_range); |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 436 | } |
| 437 | |
Trond Myklebust | 2495680 | 2013-03-20 13:03:00 -0400 | [diff] [blame] | 438 | static bool pnfs_lseg_dec_and_remove_zero(struct pnfs_layout_segment *lseg, |
| 439 | struct list_head *tmp_list) |
| 440 | { |
| 441 | if (!atomic_dec_and_test(&lseg->pls_refcount)) |
| 442 | return false; |
| 443 | pnfs_layout_remove_lseg(lseg->pls_layout, lseg); |
| 444 | list_add(&lseg->pls_list, tmp_list); |
| 445 | return true; |
| 446 | } |
| 447 | |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 448 | /* Returns 1 if lseg is removed from list, 0 otherwise */ |
| 449 | static int mark_lseg_invalid(struct pnfs_layout_segment *lseg, |
| 450 | struct list_head *tmp_list) |
| 451 | { |
| 452 | int rv = 0; |
| 453 | |
| 454 | if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { |
| 455 | /* Remove the reference keeping the lseg in the |
| 456 | * list. It will now be removed when all |
| 457 | * outstanding io is finished. |
| 458 | */ |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 459 | dprintk("%s: lseg %p ref %d\n", __func__, lseg, |
| 460 | atomic_read(&lseg->pls_refcount)); |
Trond Myklebust | 2495680 | 2013-03-20 13:03:00 -0400 | [diff] [blame] | 461 | if (pnfs_lseg_dec_and_remove_zero(lseg, tmp_list)) |
Fred Isaman | d684d2a | 2011-03-01 01:34:13 +0000 | [diff] [blame] | 462 | rv = 1; |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 463 | } |
| 464 | return rv; |
| 465 | } |
| 466 | |
| 467 | /* Returns count of number of matching invalid lsegs remaining in list |
| 468 | * after call. |
| 469 | */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 470 | int |
Trond Myklebust | 49a8506 | 2012-09-18 20:43:31 -0400 | [diff] [blame] | 471 | pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 472 | struct list_head *tmp_list, |
Benny Halevy | 778b550 | 2011-05-22 19:48:02 +0300 | [diff] [blame] | 473 | struct pnfs_layout_range *recall_range) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 474 | { |
| 475 | struct pnfs_layout_segment *lseg, *next; |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 476 | int invalid = 0, removed = 0; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 477 | |
| 478 | dprintk("%s:Begin lo %p\n", __func__, lo); |
| 479 | |
Trond Myklebust | 8006bfb | 2012-09-21 14:48:04 -0400 | [diff] [blame] | 480 | if (list_empty(&lo->plh_segs)) |
Fred Isaman | 3851172 | 2011-02-03 18:28:50 +0000 | [diff] [blame] | 481 | return 0; |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 482 | list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) |
Benny Halevy | 778b550 | 2011-05-22 19:48:02 +0300 | [diff] [blame] | 483 | if (!recall_range || |
| 484 | should_free_lseg(&lseg->pls_range, recall_range)) { |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 485 | dprintk("%s: freeing lseg %p iomode %d " |
| 486 | "offset %llu length %llu\n", __func__, |
| 487 | lseg, lseg->pls_range.iomode, lseg->pls_range.offset, |
| 488 | lseg->pls_range.length); |
| 489 | invalid++; |
| 490 | removed += mark_lseg_invalid(lseg, tmp_list); |
| 491 | } |
| 492 | dprintk("%s:Return %i\n", __func__, invalid - removed); |
| 493 | return invalid - removed; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 494 | } |
| 495 | |
Fred Isaman | f49f9ba | 2011-02-03 18:28:52 +0000 | [diff] [blame] | 496 | /* note free_me must contain lsegs from a single layout_hdr */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 497 | void |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 498 | pnfs_free_lseg_list(struct list_head *free_me) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 499 | { |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 500 | struct pnfs_layout_segment *lseg, *tmp; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 501 | |
Fred Isaman | f49f9ba | 2011-02-03 18:28:52 +0000 | [diff] [blame] | 502 | if (list_empty(free_me)) |
| 503 | return; |
| 504 | |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 505 | list_for_each_entry_safe(lseg, tmp, free_me, pls_list) { |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 506 | list_del(&lseg->pls_list); |
Trond Myklebust | 905ca19 | 2012-09-20 20:46:49 -0400 | [diff] [blame] | 507 | pnfs_free_lseg(lseg); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 508 | } |
| 509 | } |
| 510 | |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 511 | void |
| 512 | pnfs_destroy_layout(struct nfs_inode *nfsi) |
| 513 | { |
| 514 | struct pnfs_layout_hdr *lo; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 515 | LIST_HEAD(tmp_list); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 516 | |
| 517 | spin_lock(&nfsi->vfs_inode.i_lock); |
| 518 | lo = nfsi->layout; |
| 519 | if (lo) { |
Fred Isaman | 3851172 | 2011-02-03 18:28:50 +0000 | [diff] [blame] | 520 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ |
Trond Myklebust | 49a8506 | 2012-09-18 20:43:31 -0400 | [diff] [blame] | 521 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
Trond Myklebust | 3e62121 | 2012-09-24 13:07:16 -0400 | [diff] [blame] | 522 | pnfs_get_layout_hdr(lo); |
| 523 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RO_FAILED); |
| 524 | pnfs_layout_clear_fail_bit(lo, NFS_LAYOUT_RW_FAILED); |
| 525 | spin_unlock(&nfsi->vfs_inode.i_lock); |
| 526 | pnfs_free_lseg_list(&tmp_list); |
| 527 | pnfs_put_layout_hdr(lo); |
| 528 | } else |
| 529 | spin_unlock(&nfsi->vfs_inode.i_lock); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 530 | } |
Andy Adamson | 041245c | 2012-04-27 17:53:53 -0400 | [diff] [blame] | 531 | EXPORT_SYMBOL_GPL(pnfs_destroy_layout); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 532 | |
Trond Myklebust | fd9a8d7 | 2013-02-12 09:48:42 -0500 | [diff] [blame] | 533 | static bool |
| 534 | pnfs_layout_add_bulk_destroy_list(struct inode *inode, |
| 535 | struct list_head *layout_list) |
| 536 | { |
| 537 | struct pnfs_layout_hdr *lo; |
| 538 | bool ret = false; |
| 539 | |
| 540 | spin_lock(&inode->i_lock); |
| 541 | lo = NFS_I(inode)->layout; |
| 542 | if (lo != NULL && list_empty(&lo->plh_bulk_destroy)) { |
| 543 | pnfs_get_layout_hdr(lo); |
| 544 | list_add(&lo->plh_bulk_destroy, layout_list); |
| 545 | ret = true; |
| 546 | } |
| 547 | spin_unlock(&inode->i_lock); |
| 548 | return ret; |
| 549 | } |
| 550 | |
| 551 | /* Caller must hold rcu_read_lock and clp->cl_lock */ |
| 552 | static int |
| 553 | pnfs_layout_bulk_destroy_byserver_locked(struct nfs_client *clp, |
| 554 | struct nfs_server *server, |
| 555 | struct list_head *layout_list) |
| 556 | { |
| 557 | struct pnfs_layout_hdr *lo, *next; |
| 558 | struct inode *inode; |
| 559 | |
| 560 | list_for_each_entry_safe(lo, next, &server->layouts, plh_layouts) { |
| 561 | inode = igrab(lo->plh_inode); |
| 562 | if (inode == NULL) |
| 563 | continue; |
| 564 | list_del_init(&lo->plh_layouts); |
| 565 | if (pnfs_layout_add_bulk_destroy_list(inode, layout_list)) |
| 566 | continue; |
| 567 | rcu_read_unlock(); |
| 568 | spin_unlock(&clp->cl_lock); |
| 569 | iput(inode); |
| 570 | spin_lock(&clp->cl_lock); |
| 571 | rcu_read_lock(); |
| 572 | return -EAGAIN; |
| 573 | } |
| 574 | return 0; |
| 575 | } |
| 576 | |
| 577 | static int |
| 578 | pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list, |
| 579 | bool is_bulk_recall) |
| 580 | { |
| 581 | struct pnfs_layout_hdr *lo; |
| 582 | struct inode *inode; |
| 583 | struct pnfs_layout_range range = { |
| 584 | .iomode = IOMODE_ANY, |
| 585 | .offset = 0, |
| 586 | .length = NFS4_MAX_UINT64, |
| 587 | }; |
| 588 | LIST_HEAD(lseg_list); |
| 589 | int ret = 0; |
| 590 | |
| 591 | while (!list_empty(layout_list)) { |
| 592 | lo = list_entry(layout_list->next, struct pnfs_layout_hdr, |
| 593 | plh_bulk_destroy); |
| 594 | dprintk("%s freeing layout for inode %lu\n", __func__, |
| 595 | lo->plh_inode->i_ino); |
| 596 | inode = lo->plh_inode; |
| 597 | spin_lock(&inode->i_lock); |
| 598 | list_del_init(&lo->plh_bulk_destroy); |
| 599 | lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */ |
| 600 | if (is_bulk_recall) |
| 601 | set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); |
| 602 | if (pnfs_mark_matching_lsegs_invalid(lo, &lseg_list, &range)) |
| 603 | ret = -EAGAIN; |
| 604 | spin_unlock(&inode->i_lock); |
| 605 | pnfs_free_lseg_list(&lseg_list); |
| 606 | pnfs_put_layout_hdr(lo); |
| 607 | iput(inode); |
| 608 | } |
| 609 | return ret; |
| 610 | } |
| 611 | |
| 612 | int |
| 613 | pnfs_destroy_layouts_byfsid(struct nfs_client *clp, |
| 614 | struct nfs_fsid *fsid, |
| 615 | bool is_recall) |
| 616 | { |
| 617 | struct nfs_server *server; |
| 618 | LIST_HEAD(layout_list); |
| 619 | |
| 620 | spin_lock(&clp->cl_lock); |
| 621 | rcu_read_lock(); |
| 622 | restart: |
| 623 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 624 | if (memcmp(&server->fsid, fsid, sizeof(*fsid)) != 0) |
| 625 | continue; |
| 626 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, |
| 627 | server, |
| 628 | &layout_list) != 0) |
| 629 | goto restart; |
| 630 | } |
| 631 | rcu_read_unlock(); |
| 632 | spin_unlock(&clp->cl_lock); |
| 633 | |
| 634 | if (list_empty(&layout_list)) |
| 635 | return 0; |
| 636 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); |
| 637 | } |
| 638 | |
| 639 | int |
| 640 | pnfs_destroy_layouts_byclid(struct nfs_client *clp, |
| 641 | bool is_recall) |
| 642 | { |
| 643 | struct nfs_server *server; |
| 644 | LIST_HEAD(layout_list); |
| 645 | |
| 646 | spin_lock(&clp->cl_lock); |
| 647 | rcu_read_lock(); |
| 648 | restart: |
| 649 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { |
| 650 | if (pnfs_layout_bulk_destroy_byserver_locked(clp, |
| 651 | server, |
| 652 | &layout_list) != 0) |
| 653 | goto restart; |
| 654 | } |
| 655 | rcu_read_unlock(); |
| 656 | spin_unlock(&clp->cl_lock); |
| 657 | |
| 658 | if (list_empty(&layout_list)) |
| 659 | return 0; |
| 660 | return pnfs_layout_free_bulk_destroy_list(&layout_list, is_recall); |
| 661 | } |
| 662 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 663 | /* |
| 664 | * Called by the state manger to remove all layouts established under an |
| 665 | * expired lease. |
| 666 | */ |
| 667 | void |
| 668 | pnfs_destroy_all_layouts(struct nfs_client *clp) |
| 669 | { |
Andy Adamson | c47abcf | 2011-06-15 17:52:40 -0400 | [diff] [blame] | 670 | nfs4_deviceid_mark_client_invalid(clp); |
| 671 | nfs4_deviceid_purge_client(clp); |
| 672 | |
Trond Myklebust | fd9a8d7 | 2013-02-12 09:48:42 -0500 | [diff] [blame] | 673 | pnfs_destroy_layouts_byclid(clp, false); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 674 | } |
| 675 | |
Trond Myklebust | 5a65503 | 2012-10-02 16:47:14 -0700 | [diff] [blame] | 676 | /* |
| 677 | * Compare 2 layout stateid sequence ids, to see which is newer, |
| 678 | * taking into account wraparound issues. |
| 679 | */ |
| 680 | static bool pnfs_seqid_is_newer(u32 s1, u32 s2) |
| 681 | { |
Trond Myklebust | 2c64c57 | 2014-02-12 09:36:59 -0500 | [diff] [blame] | 682 | return (s32)(s1 - s2) > 0; |
Trond Myklebust | 5a65503 | 2012-10-02 16:47:14 -0700 | [diff] [blame] | 683 | } |
| 684 | |
Trond Myklebust | 78096cc | 2014-02-12 10:02:27 -0500 | [diff] [blame] | 685 | static void |
| 686 | pnfs_verify_layout_stateid(struct pnfs_layout_hdr *lo, |
| 687 | const nfs4_stateid *new, |
| 688 | struct list_head *free_me_list) |
| 689 | { |
| 690 | if (nfs4_stateid_match_other(&lo->plh_stateid, new)) |
| 691 | return; |
| 692 | /* Layout is new! Kill existing layout segments */ |
| 693 | pnfs_mark_matching_lsegs_invalid(lo, free_me_list, NULL); |
| 694 | } |
| 695 | |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 696 | /* update lo->plh_stateid with new if is more recent */ |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 697 | void |
| 698 | pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new, |
| 699 | bool update_barrier) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 700 | { |
Trond Myklebust | 22aaf71 | 2012-10-04 16:32:22 -0700 | [diff] [blame] | 701 | u32 oldseq, newseq, new_barrier; |
| 702 | int empty = list_empty(&lo->plh_segs); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 703 | |
Trond Myklebust | 2d2f24a | 2012-03-04 18:13:57 -0500 | [diff] [blame] | 704 | oldseq = be32_to_cpu(lo->plh_stateid.seqid); |
| 705 | newseq = be32_to_cpu(new->seqid); |
Trond Myklebust | 22aaf71 | 2012-10-04 16:32:22 -0700 | [diff] [blame] | 706 | if (empty || pnfs_seqid_is_newer(newseq, oldseq)) { |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 707 | nfs4_stateid_copy(&lo->plh_stateid, new); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 708 | if (update_barrier) { |
Trond Myklebust | 22aaf71 | 2012-10-04 16:32:22 -0700 | [diff] [blame] | 709 | new_barrier = be32_to_cpu(new->seqid); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 710 | } else { |
| 711 | /* Because of wraparound, we want to keep the barrier |
Trond Myklebust | 22aaf71 | 2012-10-04 16:32:22 -0700 | [diff] [blame] | 712 | * "close" to the current seqids. |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 713 | */ |
Trond Myklebust | 22aaf71 | 2012-10-04 16:32:22 -0700 | [diff] [blame] | 714 | new_barrier = newseq - atomic_read(&lo->plh_outstanding); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 715 | } |
Trond Myklebust | 22aaf71 | 2012-10-04 16:32:22 -0700 | [diff] [blame] | 716 | if (empty || pnfs_seqid_is_newer(new_barrier, lo->plh_barrier)) |
| 717 | lo->plh_barrier = new_barrier; |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 718 | } |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 719 | } |
| 720 | |
Trond Myklebust | 19c54ab | 2012-10-05 16:56:58 -0700 | [diff] [blame] | 721 | static bool |
| 722 | pnfs_layout_stateid_blocked(const struct pnfs_layout_hdr *lo, |
| 723 | const nfs4_stateid *stateid) |
| 724 | { |
| 725 | u32 seqid = be32_to_cpu(stateid->seqid); |
| 726 | |
| 727 | return !pnfs_seqid_is_newer(seqid, lo->plh_barrier); |
| 728 | } |
| 729 | |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 730 | /* lget is set to 1 if called from inside send_layoutget call chain */ |
| 731 | static bool |
Trond Myklebust | 19c54ab | 2012-10-05 16:56:58 -0700 | [diff] [blame] | 732 | pnfs_layoutgets_blocked(const struct pnfs_layout_hdr *lo, int lget) |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 733 | { |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 734 | return lo->plh_block_lgets || |
| 735 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 736 | (list_empty(&lo->plh_segs) && |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 737 | (atomic_read(&lo->plh_outstanding) > lget)); |
| 738 | } |
| 739 | |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 740 | int |
| 741 | pnfs_choose_layoutget_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo, |
| 742 | struct nfs4_state *open_state) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 743 | { |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 744 | int status = 0; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 745 | |
| 746 | dprintk("--> %s\n", __func__); |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 747 | spin_lock(&lo->plh_inode->i_lock); |
Trond Myklebust | 19c54ab | 2012-10-05 16:56:58 -0700 | [diff] [blame] | 748 | if (pnfs_layoutgets_blocked(lo, 1)) { |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 749 | status = -EAGAIN; |
Trond Myklebust | 5d42230 | 2013-03-14 16:57:48 -0400 | [diff] [blame] | 750 | } else if (!nfs4_valid_open_stateid(open_state)) { |
| 751 | status = -EBADF; |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 752 | } else if (list_empty(&lo->plh_segs)) { |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 753 | int seq; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 754 | |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 755 | do { |
| 756 | seq = read_seqbegin(&open_state->seqlock); |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 757 | nfs4_stateid_copy(dst, &open_state->stateid); |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 758 | } while (read_seqretry(&open_state->seqlock, seq)); |
| 759 | } else |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 760 | nfs4_stateid_copy(dst, &lo->plh_stateid); |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 761 | spin_unlock(&lo->plh_inode->i_lock); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 762 | dprintk("<-- %s\n", __func__); |
Fred Isaman | fd6002e | 2011-01-06 11:36:22 +0000 | [diff] [blame] | 763 | return status; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 764 | } |
| 765 | |
| 766 | /* |
| 767 | * Get layout from server. |
| 768 | * for now, assume that whole file layouts are requested. |
| 769 | * arg->offset: 0 |
| 770 | * arg->length: all ones |
| 771 | */ |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 772 | static struct pnfs_layout_segment * |
| 773 | send_layoutget(struct pnfs_layout_hdr *lo, |
| 774 | struct nfs_open_context *ctx, |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 775 | struct pnfs_layout_range *range, |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 776 | gfp_t gfp_flags) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 777 | { |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 778 | struct inode *ino = lo->plh_inode; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 779 | struct nfs_server *server = NFS_SERVER(ino); |
| 780 | struct nfs4_layoutget *lgp; |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 781 | struct pnfs_layout_segment *lseg; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 782 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 783 | dprintk("--> %s\n", __func__); |
| 784 | |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 785 | lgp = kzalloc(sizeof(*lgp), gfp_flags); |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 786 | if (lgp == NULL) |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 787 | return NULL; |
Weston Andros Adamson | 35124a0 | 2011-03-24 16:48:21 -0400 | [diff] [blame] | 788 | |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 789 | lgp->args.minlength = PAGE_CACHE_SIZE; |
| 790 | if (lgp->args.minlength > range->length) |
| 791 | lgp->args.minlength = range->length; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 792 | lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE; |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 793 | lgp->args.range = *range; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 794 | lgp->args.type = server->pnfs_curr_ld->id; |
| 795 | lgp->args.inode = ino; |
| 796 | lgp->args.ctx = get_nfs_open_context(ctx); |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 797 | lgp->gfp_flags = gfp_flags; |
Trond Myklebust | 6ab5934 | 2013-05-20 10:49:34 -0400 | [diff] [blame] | 798 | lgp->cred = lo->plh_lc_cred; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 799 | |
| 800 | /* Synchronously retrieve layout information from server and |
| 801 | * store in lseg. |
| 802 | */ |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 803 | lseg = nfs4_proc_layoutget(lgp, gfp_flags); |
| 804 | if (IS_ERR(lseg)) { |
| 805 | switch (PTR_ERR(lseg)) { |
| 806 | case -ENOMEM: |
| 807 | case -ERESTARTSYS: |
| 808 | break; |
| 809 | default: |
| 810 | /* remember that LAYOUTGET failed and suspend trying */ |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 811 | pnfs_layout_io_set_failed(lo, range->iomode); |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 812 | } |
| 813 | return NULL; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 814 | } |
Weston Andros Adamson | 35124a0 | 2011-03-24 16:48:21 -0400 | [diff] [blame] | 815 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 816 | return lseg; |
| 817 | } |
| 818 | |
Trond Myklebust | 2495680 | 2013-03-20 13:03:00 -0400 | [diff] [blame] | 819 | static void pnfs_clear_layoutcommit(struct inode *inode, |
| 820 | struct list_head *head) |
| 821 | { |
| 822 | struct nfs_inode *nfsi = NFS_I(inode); |
| 823 | struct pnfs_layout_segment *lseg, *tmp; |
| 824 | |
| 825 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
| 826 | return; |
| 827 | list_for_each_entry_safe(lseg, tmp, &nfsi->layout->plh_segs, pls_list) { |
| 828 | if (!test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) |
| 829 | continue; |
| 830 | pnfs_lseg_dec_and_remove_zero(lseg, head); |
| 831 | } |
| 832 | } |
| 833 | |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 834 | /* |
| 835 | * Initiates a LAYOUTRETURN(FILE), and removes the pnfs_layout_hdr |
| 836 | * when the layout segment list is empty. |
| 837 | * |
| 838 | * Note that a pnfs_layout_hdr can exist with an empty layout segment |
| 839 | * list when LAYOUTGET has failed, or when LAYOUTGET succeeded, but the |
| 840 | * deviceid is marked invalid. |
| 841 | */ |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 842 | int |
| 843 | _pnfs_return_layout(struct inode *ino) |
| 844 | { |
| 845 | struct pnfs_layout_hdr *lo = NULL; |
| 846 | struct nfs_inode *nfsi = NFS_I(ino); |
| 847 | LIST_HEAD(tmp_list); |
| 848 | struct nfs4_layoutreturn *lrp; |
| 849 | nfs4_stateid stateid; |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 850 | int status = 0, empty; |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 851 | |
Andy Adamson | 366d505 | 2012-06-20 15:03:33 -0400 | [diff] [blame] | 852 | dprintk("NFS: %s for inode %lu\n", __func__, ino->i_ino); |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 853 | |
| 854 | spin_lock(&ino->i_lock); |
| 855 | lo = nfsi->layout; |
Trond Myklebust | e5929f3 | 2012-09-21 16:37:02 -0400 | [diff] [blame] | 856 | if (!lo) { |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 857 | spin_unlock(&ino->i_lock); |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 858 | dprintk("NFS: %s no layout to return\n", __func__); |
| 859 | goto out; |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 860 | } |
| 861 | stateid = nfsi->layout->plh_stateid; |
| 862 | /* Reference matched in nfs4_layoutreturn_release */ |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 863 | pnfs_get_layout_hdr(lo); |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 864 | empty = list_empty(&lo->plh_segs); |
Trond Myklebust | 2495680 | 2013-03-20 13:03:00 -0400 | [diff] [blame] | 865 | pnfs_clear_layoutcommit(ino, &tmp_list); |
Trond Myklebust | 49a8506 | 2012-09-18 20:43:31 -0400 | [diff] [blame] | 866 | pnfs_mark_matching_lsegs_invalid(lo, &tmp_list, NULL); |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 867 | /* Don't send a LAYOUTRETURN if list was initially empty */ |
| 868 | if (empty) { |
| 869 | spin_unlock(&ino->i_lock); |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 870 | pnfs_put_layout_hdr(lo); |
Andy Adamson | 293b3b0 | 2012-06-20 15:03:34 -0400 | [diff] [blame] | 871 | dprintk("NFS: %s no layout segments to return\n", __func__); |
| 872 | goto out; |
| 873 | } |
Fred Isaman | ea0ded7 | 2011-06-15 12:31:02 -0400 | [diff] [blame] | 874 | lo->plh_block_lgets++; |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 875 | spin_unlock(&ino->i_lock); |
| 876 | pnfs_free_lseg_list(&tmp_list); |
| 877 | |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 878 | lrp = kzalloc(sizeof(*lrp), GFP_KERNEL); |
| 879 | if (unlikely(lrp == NULL)) { |
| 880 | status = -ENOMEM; |
Trond Myklebust | 65857d5 | 2012-09-24 13:49:27 -0400 | [diff] [blame] | 881 | spin_lock(&ino->i_lock); |
| 882 | lo->plh_block_lgets--; |
| 883 | spin_unlock(&ino->i_lock); |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 884 | pnfs_put_layout_hdr(lo); |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 885 | goto out; |
| 886 | } |
| 887 | |
| 888 | lrp->args.stateid = stateid; |
| 889 | lrp->args.layout_type = NFS_SERVER(ino)->pnfs_curr_ld->id; |
| 890 | lrp->args.inode = ino; |
Trond Myklebust | a56aaa0 | 2011-06-15 11:59:10 -0400 | [diff] [blame] | 891 | lrp->args.layout = lo; |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 892 | lrp->clp = NFS_SERVER(ino)->nfs_client; |
Trond Myklebust | 9556000 | 2013-05-20 10:43:47 -0400 | [diff] [blame] | 893 | lrp->cred = lo->plh_lc_cred; |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 894 | |
| 895 | status = nfs4_proc_layoutreturn(lrp); |
| 896 | out: |
| 897 | dprintk("<-- %s status: %d\n", __func__, status); |
| 898 | return status; |
| 899 | } |
Andy Adamson | 0a57cda | 2012-04-27 17:53:50 -0400 | [diff] [blame] | 900 | EXPORT_SYMBOL_GPL(_pnfs_return_layout); |
Benny Halevy | cbe8260 | 2011-05-22 19:52:37 +0300 | [diff] [blame] | 901 | |
Trond Myklebust | 2402867 | 2013-03-20 13:23:33 -0400 | [diff] [blame] | 902 | int |
| 903 | pnfs_commit_and_return_layout(struct inode *inode) |
| 904 | { |
| 905 | struct pnfs_layout_hdr *lo; |
| 906 | int ret; |
| 907 | |
| 908 | spin_lock(&inode->i_lock); |
| 909 | lo = NFS_I(inode)->layout; |
| 910 | if (lo == NULL) { |
| 911 | spin_unlock(&inode->i_lock); |
| 912 | return 0; |
| 913 | } |
| 914 | pnfs_get_layout_hdr(lo); |
| 915 | /* Block new layoutgets and read/write to ds */ |
| 916 | lo->plh_block_lgets++; |
| 917 | spin_unlock(&inode->i_lock); |
| 918 | filemap_fdatawait(inode->i_mapping); |
| 919 | ret = pnfs_layoutcommit_inode(inode, true); |
| 920 | if (ret == 0) |
| 921 | ret = _pnfs_return_layout(inode); |
| 922 | spin_lock(&inode->i_lock); |
| 923 | lo->plh_block_lgets--; |
| 924 | spin_unlock(&inode->i_lock); |
| 925 | pnfs_put_layout_hdr(lo); |
| 926 | return ret; |
| 927 | } |
| 928 | |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 929 | bool pnfs_roc(struct inode *ino) |
| 930 | { |
| 931 | struct pnfs_layout_hdr *lo; |
| 932 | struct pnfs_layout_segment *lseg, *tmp; |
| 933 | LIST_HEAD(tmp_list); |
| 934 | bool found = false; |
| 935 | |
| 936 | spin_lock(&ino->i_lock); |
| 937 | lo = NFS_I(ino)->layout; |
| 938 | if (!lo || !test_and_clear_bit(NFS_LAYOUT_ROC, &lo->plh_flags) || |
| 939 | test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) |
| 940 | goto out_nolayout; |
| 941 | list_for_each_entry_safe(lseg, tmp, &lo->plh_segs, pls_list) |
| 942 | if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { |
| 943 | mark_lseg_invalid(lseg, &tmp_list); |
| 944 | found = true; |
| 945 | } |
| 946 | if (!found) |
| 947 | goto out_nolayout; |
| 948 | lo->plh_block_lgets++; |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 949 | pnfs_get_layout_hdr(lo); /* matched in pnfs_roc_release */ |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 950 | spin_unlock(&ino->i_lock); |
| 951 | pnfs_free_lseg_list(&tmp_list); |
| 952 | return true; |
| 953 | |
| 954 | out_nolayout: |
| 955 | spin_unlock(&ino->i_lock); |
| 956 | return false; |
| 957 | } |
| 958 | |
| 959 | void pnfs_roc_release(struct inode *ino) |
| 960 | { |
| 961 | struct pnfs_layout_hdr *lo; |
| 962 | |
| 963 | spin_lock(&ino->i_lock); |
| 964 | lo = NFS_I(ino)->layout; |
| 965 | lo->plh_block_lgets--; |
Trond Myklebust | 6622c3e | 2012-09-20 17:23:11 -0400 | [diff] [blame] | 966 | if (atomic_dec_and_test(&lo->plh_refcount)) { |
| 967 | pnfs_detach_layout_hdr(lo); |
| 968 | spin_unlock(&ino->i_lock); |
| 969 | pnfs_free_layout_hdr(lo); |
| 970 | } else |
| 971 | spin_unlock(&ino->i_lock); |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 972 | } |
| 973 | |
| 974 | void pnfs_roc_set_barrier(struct inode *ino, u32 barrier) |
| 975 | { |
| 976 | struct pnfs_layout_hdr *lo; |
| 977 | |
| 978 | spin_lock(&ino->i_lock); |
| 979 | lo = NFS_I(ino)->layout; |
Trond Myklebust | 0f35ad6 | 2012-10-04 16:28:17 -0700 | [diff] [blame] | 980 | if (pnfs_seqid_is_newer(barrier, lo->plh_barrier)) |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 981 | lo->plh_barrier = barrier; |
| 982 | spin_unlock(&ino->i_lock); |
| 983 | } |
| 984 | |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 985 | 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] | 986 | { |
| 987 | struct nfs_inode *nfsi = NFS_I(ino); |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 988 | struct pnfs_layout_hdr *lo; |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 989 | struct pnfs_layout_segment *lseg; |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 990 | u32 current_seqid; |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 991 | bool found = false; |
| 992 | |
| 993 | spin_lock(&ino->i_lock); |
| 994 | list_for_each_entry(lseg, &nfsi->layout->plh_segs, pls_list) |
| 995 | if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 996 | rpc_sleep_on(&NFS_SERVER(ino)->roc_rpcwaitq, task, NULL); |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 997 | found = true; |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 998 | goto out; |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 999 | } |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 1000 | lo = nfsi->layout; |
| 1001 | current_seqid = be32_to_cpu(lo->plh_stateid.seqid); |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 1002 | |
Trond Myklebust | 7fdab06 | 2012-09-20 20:15:57 -0400 | [diff] [blame] | 1003 | /* Since close does not return a layout stateid for use as |
| 1004 | * a barrier, we choose the worst-case barrier. |
| 1005 | */ |
| 1006 | *barrier = current_seqid + atomic_read(&lo->plh_outstanding); |
| 1007 | out: |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 1008 | spin_unlock(&ino->i_lock); |
| 1009 | return found; |
| 1010 | } |
| 1011 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1012 | /* |
| 1013 | * Compare two layout segments for sorting into layout cache. |
| 1014 | * We want to preferentially return RW over RO layouts, so ensure those |
| 1015 | * are seen first. |
| 1016 | */ |
| 1017 | static s64 |
Trond Myklebust | 7dc0ac7 | 2013-06-03 11:30:24 -0400 | [diff] [blame] | 1018 | pnfs_lseg_range_cmp(const struct pnfs_layout_range *l1, |
Trond Myklebust | 3cb2df1 | 2013-06-03 11:24:36 -0400 | [diff] [blame] | 1019 | const struct pnfs_layout_range *l2) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1020 | { |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1021 | s64 d; |
| 1022 | |
| 1023 | /* high offset > low offset */ |
| 1024 | d = l1->offset - l2->offset; |
| 1025 | if (d) |
| 1026 | return d; |
| 1027 | |
| 1028 | /* short length > long length */ |
| 1029 | d = l2->length - l1->length; |
| 1030 | if (d) |
| 1031 | return d; |
| 1032 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1033 | /* read > read/write */ |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1034 | return (int)(l1->iomode == IOMODE_READ) - (int)(l2->iomode == IOMODE_READ); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1035 | } |
| 1036 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 1037 | static void |
Trond Myklebust | 57036a3 | 2012-09-20 16:33:30 -0400 | [diff] [blame] | 1038 | pnfs_layout_insert_lseg(struct pnfs_layout_hdr *lo, |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 1039 | struct pnfs_layout_segment *lseg) |
| 1040 | { |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1041 | struct pnfs_layout_segment *lp; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1042 | |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 1043 | dprintk("%s:Begin\n", __func__); |
| 1044 | |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 1045 | list_for_each_entry(lp, &lo->plh_segs, pls_list) { |
Trond Myklebust | 7dc0ac7 | 2013-06-03 11:30:24 -0400 | [diff] [blame] | 1046 | if (pnfs_lseg_range_cmp(&lseg->pls_range, &lp->pls_range) > 0) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1047 | continue; |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 1048 | list_add_tail(&lseg->pls_list, &lp->pls_list); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1049 | dprintk("%s: inserted lseg %p " |
| 1050 | "iomode %d offset %llu length %llu before " |
| 1051 | "lp %p iomode %d offset %llu length %llu\n", |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 1052 | __func__, lseg, lseg->pls_range.iomode, |
| 1053 | lseg->pls_range.offset, lseg->pls_range.length, |
| 1054 | lp, lp->pls_range.iomode, lp->pls_range.offset, |
| 1055 | lp->pls_range.length); |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1056 | goto out; |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 1057 | } |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1058 | list_add_tail(&lseg->pls_list, &lo->plh_segs); |
| 1059 | dprintk("%s: inserted lseg %p " |
| 1060 | "iomode %d offset %llu length %llu at tail\n", |
| 1061 | __func__, lseg, lseg->pls_range.iomode, |
| 1062 | lseg->pls_range.offset, lseg->pls_range.length); |
| 1063 | out: |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 1064 | pnfs_get_layout_hdr(lo); |
Andy Adamson | 974cec8 | 2010-10-20 00:18:02 -0400 | [diff] [blame] | 1065 | |
| 1066 | dprintk("%s:Return\n", __func__); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1067 | } |
| 1068 | |
| 1069 | static struct pnfs_layout_hdr * |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 1070 | alloc_init_layout_hdr(struct inode *ino, |
| 1071 | struct nfs_open_context *ctx, |
| 1072 | gfp_t gfp_flags) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1073 | { |
| 1074 | struct pnfs_layout_hdr *lo; |
| 1075 | |
Benny Halevy | 636fb9c | 2011-05-22 19:51:33 +0300 | [diff] [blame] | 1076 | lo = pnfs_alloc_layout_hdr(ino, gfp_flags); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1077 | if (!lo) |
| 1078 | return NULL; |
Fred Isaman | cc6e534 | 2011-01-06 11:36:28 +0000 | [diff] [blame] | 1079 | atomic_set(&lo->plh_refcount, 1); |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 1080 | INIT_LIST_HEAD(&lo->plh_layouts); |
| 1081 | INIT_LIST_HEAD(&lo->plh_segs); |
Trond Myklebust | fd9a8d7 | 2013-02-12 09:48:42 -0500 | [diff] [blame] | 1082 | INIT_LIST_HEAD(&lo->plh_bulk_destroy); |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 1083 | lo->plh_inode = ino; |
Trond Myklebust | 5cc2216 | 2013-05-21 09:26:49 -0400 | [diff] [blame] | 1084 | lo->plh_lc_cred = get_rpccred(ctx->cred); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1085 | return lo; |
| 1086 | } |
| 1087 | |
| 1088 | static struct pnfs_layout_hdr * |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 1089 | pnfs_find_alloc_layout(struct inode *ino, |
| 1090 | struct nfs_open_context *ctx, |
| 1091 | gfp_t gfp_flags) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1092 | { |
| 1093 | struct nfs_inode *nfsi = NFS_I(ino); |
| 1094 | struct pnfs_layout_hdr *new = NULL; |
| 1095 | |
| 1096 | dprintk("%s Begin ino=%p layout=%p\n", __func__, ino, nfsi->layout); |
| 1097 | |
Trond Myklebust | 251ec41 | 2012-10-02 15:41:05 -0700 | [diff] [blame] | 1098 | if (nfsi->layout != NULL) |
| 1099 | goto out_existing; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1100 | spin_unlock(&ino->i_lock); |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 1101 | new = alloc_init_layout_hdr(ino, ctx, gfp_flags); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1102 | spin_lock(&ino->i_lock); |
| 1103 | |
Trond Myklebust | 251ec41 | 2012-10-02 15:41:05 -0700 | [diff] [blame] | 1104 | if (likely(nfsi->layout == NULL)) { /* Won the race? */ |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1105 | nfsi->layout = new; |
Trond Myklebust | 251ec41 | 2012-10-02 15:41:05 -0700 | [diff] [blame] | 1106 | return new; |
Yanchuan Nian | 7175fe9 | 2012-10-31 16:05:48 +0800 | [diff] [blame] | 1107 | } else if (new != NULL) |
| 1108 | pnfs_free_layout_hdr(new); |
Trond Myklebust | 251ec41 | 2012-10-02 15:41:05 -0700 | [diff] [blame] | 1109 | out_existing: |
| 1110 | pnfs_get_layout_hdr(nfsi->layout); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1111 | return nfsi->layout; |
| 1112 | } |
| 1113 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1114 | /* |
| 1115 | * iomode matching rules: |
| 1116 | * iomode lseg match |
| 1117 | * ----- ----- ----- |
| 1118 | * ANY READ true |
| 1119 | * ANY RW true |
| 1120 | * RW READ false |
| 1121 | * RW RW true |
| 1122 | * READ READ true |
| 1123 | * READ RW true |
| 1124 | */ |
Trond Myklebust | 3cb2df1 | 2013-06-03 11:24:36 -0400 | [diff] [blame] | 1125 | static bool |
Trond Myklebust | 7dc0ac7 | 2013-06-03 11:30:24 -0400 | [diff] [blame] | 1126 | pnfs_lseg_range_match(const struct pnfs_layout_range *ls_range, |
Trond Myklebust | 3cb2df1 | 2013-06-03 11:24:36 -0400 | [diff] [blame] | 1127 | const struct pnfs_layout_range *range) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1128 | { |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1129 | struct pnfs_layout_range range1; |
| 1130 | |
| 1131 | if ((range->iomode == IOMODE_RW && |
| 1132 | ls_range->iomode != IOMODE_RW) || |
Trond Myklebust | 7dc0ac7 | 2013-06-03 11:30:24 -0400 | [diff] [blame] | 1133 | !pnfs_lseg_range_intersecting(ls_range, range)) |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1134 | return 0; |
| 1135 | |
| 1136 | /* range1 covers only the first byte in the range */ |
| 1137 | range1 = *range; |
| 1138 | range1.length = 1; |
Trond Myklebust | 7dc0ac7 | 2013-06-03 11:30:24 -0400 | [diff] [blame] | 1139 | return pnfs_lseg_range_contained(ls_range, &range1); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1140 | } |
| 1141 | |
| 1142 | /* |
| 1143 | * lookup range in layout |
| 1144 | */ |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1145 | static struct pnfs_layout_segment * |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1146 | pnfs_find_lseg(struct pnfs_layout_hdr *lo, |
| 1147 | struct pnfs_layout_range *range) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1148 | { |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1149 | struct pnfs_layout_segment *lseg, *ret = NULL; |
| 1150 | |
| 1151 | dprintk("%s:Begin\n", __func__); |
| 1152 | |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 1153 | list_for_each_entry(lseg, &lo->plh_segs, pls_list) { |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 1154 | if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) && |
Trond Myklebust | 7dc0ac7 | 2013-06-03 11:30:24 -0400 | [diff] [blame] | 1155 | pnfs_lseg_range_match(&lseg->pls_range, range)) { |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1156 | ret = pnfs_get_lseg(lseg); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1157 | break; |
| 1158 | } |
Benny Halevy | d771e3a | 2011-06-14 16:30:16 -0400 | [diff] [blame] | 1159 | if (lseg->pls_range.offset > range->offset) |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1160 | break; |
| 1161 | } |
| 1162 | |
| 1163 | dprintk("%s:Return lseg %p ref %d\n", |
Fred Isaman | 4541d16 | 2011-01-06 11:36:23 +0000 | [diff] [blame] | 1164 | __func__, ret, ret ? atomic_read(&ret->pls_refcount) : 0); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1165 | return ret; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1166 | } |
| 1167 | |
| 1168 | /* |
Andy Adamson | d23d61c | 2012-05-23 05:02:37 -0400 | [diff] [blame] | 1169 | * Use mdsthreshold hints set at each OPEN to determine if I/O should go |
| 1170 | * to the MDS or over pNFS |
| 1171 | * |
| 1172 | * The nfs_inode read_io and write_io fields are cumulative counters reset |
| 1173 | * when there are no layout segments. Note that in pnfs_update_layout iomode |
| 1174 | * is set to IOMODE_READ for a READ request, and set to IOMODE_RW for a |
| 1175 | * WRITE request. |
| 1176 | * |
| 1177 | * A return of true means use MDS I/O. |
| 1178 | * |
| 1179 | * From rfc 5661: |
| 1180 | * If a file's size is smaller than the file size threshold, data accesses |
| 1181 | * SHOULD be sent to the metadata server. If an I/O request has a length that |
| 1182 | * is below the I/O size threshold, the I/O SHOULD be sent to the metadata |
| 1183 | * server. If both file size and I/O size are provided, the client SHOULD |
| 1184 | * reach or exceed both thresholds before sending its read or write |
| 1185 | * requests to the data server. |
| 1186 | */ |
| 1187 | static bool pnfs_within_mdsthreshold(struct nfs_open_context *ctx, |
| 1188 | struct inode *ino, int iomode) |
| 1189 | { |
| 1190 | struct nfs4_threshold *t = ctx->mdsthreshold; |
| 1191 | struct nfs_inode *nfsi = NFS_I(ino); |
| 1192 | loff_t fsize = i_size_read(ino); |
| 1193 | bool size = false, size_set = false, io = false, io_set = false, ret = false; |
| 1194 | |
| 1195 | if (t == NULL) |
| 1196 | return ret; |
| 1197 | |
| 1198 | dprintk("%s bm=0x%x rd_sz=%llu wr_sz=%llu rd_io=%llu wr_io=%llu\n", |
| 1199 | __func__, t->bm, t->rd_sz, t->wr_sz, t->rd_io_sz, t->wr_io_sz); |
| 1200 | |
| 1201 | switch (iomode) { |
| 1202 | case IOMODE_READ: |
| 1203 | if (t->bm & THRESHOLD_RD) { |
| 1204 | dprintk("%s fsize %llu\n", __func__, fsize); |
| 1205 | size_set = true; |
| 1206 | if (fsize < t->rd_sz) |
| 1207 | size = true; |
| 1208 | } |
| 1209 | if (t->bm & THRESHOLD_RD_IO) { |
| 1210 | dprintk("%s nfsi->read_io %llu\n", __func__, |
| 1211 | nfsi->read_io); |
| 1212 | io_set = true; |
| 1213 | if (nfsi->read_io < t->rd_io_sz) |
| 1214 | io = true; |
| 1215 | } |
| 1216 | break; |
| 1217 | case IOMODE_RW: |
| 1218 | if (t->bm & THRESHOLD_WR) { |
| 1219 | dprintk("%s fsize %llu\n", __func__, fsize); |
| 1220 | size_set = true; |
| 1221 | if (fsize < t->wr_sz) |
| 1222 | size = true; |
| 1223 | } |
| 1224 | if (t->bm & THRESHOLD_WR_IO) { |
| 1225 | dprintk("%s nfsi->write_io %llu\n", __func__, |
| 1226 | nfsi->write_io); |
| 1227 | io_set = true; |
| 1228 | if (nfsi->write_io < t->wr_io_sz) |
| 1229 | io = true; |
| 1230 | } |
| 1231 | break; |
| 1232 | } |
| 1233 | if (size_set && io_set) { |
| 1234 | if (size && io) |
| 1235 | ret = true; |
| 1236 | } else if (size || io) |
| 1237 | ret = true; |
| 1238 | |
| 1239 | dprintk("<-- %s size %d io %d ret %d\n", __func__, size, io, ret); |
| 1240 | return ret; |
| 1241 | } |
| 1242 | |
| 1243 | /* |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1244 | * Layout segment is retreived from the server if not cached. |
| 1245 | * The appropriate layout segment is referenced and returned to the caller. |
| 1246 | */ |
Andy Adamson | 7c24d94 | 2011-06-13 18:22:38 -0400 | [diff] [blame] | 1247 | struct pnfs_layout_segment * |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1248 | pnfs_update_layout(struct inode *ino, |
| 1249 | struct nfs_open_context *ctx, |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1250 | loff_t pos, |
| 1251 | u64 count, |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 1252 | enum pnfs_iomode iomode, |
| 1253 | gfp_t gfp_flags) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1254 | { |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1255 | struct pnfs_layout_range arg = { |
| 1256 | .iomode = iomode, |
| 1257 | .offset = pos, |
| 1258 | .length = count, |
| 1259 | }; |
Benny Halevy | 707ed5f | 2011-05-22 19:47:46 +0300 | [diff] [blame] | 1260 | unsigned pg_offset; |
Weston Andros Adamson | 6382a44 | 2011-06-01 16:44:44 -0400 | [diff] [blame] | 1261 | struct nfs_server *server = NFS_SERVER(ino); |
| 1262 | struct nfs_client *clp = server->nfs_client; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1263 | struct pnfs_layout_hdr *lo; |
| 1264 | struct pnfs_layout_segment *lseg = NULL; |
Weston Andros Adamson | 3000512 | 2013-02-28 20:30:10 -0500 | [diff] [blame] | 1265 | bool first; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1266 | |
| 1267 | if (!pnfs_enabled_sb(NFS_SERVER(ino))) |
Trond Myklebust | f86bbcf | 2012-09-26 11:21:40 -0400 | [diff] [blame] | 1268 | goto out; |
Andy Adamson | d23d61c | 2012-05-23 05:02:37 -0400 | [diff] [blame] | 1269 | |
| 1270 | if (pnfs_within_mdsthreshold(ctx, ino, iomode)) |
Trond Myklebust | f86bbcf | 2012-09-26 11:21:40 -0400 | [diff] [blame] | 1271 | goto out; |
Andy Adamson | d23d61c | 2012-05-23 05:02:37 -0400 | [diff] [blame] | 1272 | |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1273 | spin_lock(&ino->i_lock); |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 1274 | lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags); |
Trond Myklebust | 830ffb5 | 2012-09-20 21:25:19 -0400 | [diff] [blame] | 1275 | if (lo == NULL) { |
| 1276 | spin_unlock(&ino->i_lock); |
| 1277 | goto out; |
| 1278 | } |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1279 | |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 1280 | /* Do we even need to bother with this? */ |
Trond Myklebust | a59c30a | 2012-03-01 11:17:47 -0500 | [diff] [blame] | 1281 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 1282 | dprintk("%s matches recall, use MDS\n", __func__); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1283 | goto out_unlock; |
| 1284 | } |
| 1285 | |
| 1286 | /* if LAYOUTGET already failed once we don't try again */ |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 1287 | if (pnfs_layout_io_test_failed(lo, iomode)) |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1288 | goto out_unlock; |
| 1289 | |
Andy Adamson | 568e8c4 | 2011-03-01 01:34:22 +0000 | [diff] [blame] | 1290 | /* Check to see if the layout for the given range already exists */ |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1291 | lseg = pnfs_find_lseg(lo, &arg); |
Andy Adamson | 568e8c4 | 2011-03-01 01:34:22 +0000 | [diff] [blame] | 1292 | if (lseg) |
| 1293 | goto out_unlock; |
| 1294 | |
Trond Myklebust | 19c54ab | 2012-10-05 16:56:58 -0700 | [diff] [blame] | 1295 | if (pnfs_layoutgets_blocked(lo, 0)) |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 1296 | goto out_unlock; |
| 1297 | atomic_inc(&lo->plh_outstanding); |
| 1298 | |
Weston Andros Adamson | 3000512 | 2013-02-28 20:30:10 -0500 | [diff] [blame] | 1299 | first = list_empty(&lo->plh_layouts) ? true : false; |
Fred Isaman | f49f9ba | 2011-02-03 18:28:52 +0000 | [diff] [blame] | 1300 | spin_unlock(&ino->i_lock); |
Weston Andros Adamson | 3000512 | 2013-02-28 20:30:10 -0500 | [diff] [blame] | 1301 | |
Fred Isaman | f49f9ba | 2011-02-03 18:28:52 +0000 | [diff] [blame] | 1302 | if (first) { |
Fred Isaman | 2130ff6 | 2011-01-06 11:36:26 +0000 | [diff] [blame] | 1303 | /* The lo must be on the clp list if there is any |
| 1304 | * chance of a CB_LAYOUTRECALL(FILE) coming in. |
| 1305 | */ |
| 1306 | spin_lock(&clp->cl_lock); |
Weston Andros Adamson | 6382a44 | 2011-06-01 16:44:44 -0400 | [diff] [blame] | 1307 | list_add_tail(&lo->plh_layouts, &server->layouts); |
Fred Isaman | 2130ff6 | 2011-01-06 11:36:26 +0000 | [diff] [blame] | 1308 | spin_unlock(&clp->cl_lock); |
| 1309 | } |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1310 | |
Benny Halevy | 707ed5f | 2011-05-22 19:47:46 +0300 | [diff] [blame] | 1311 | pg_offset = arg.offset & ~PAGE_CACHE_MASK; |
| 1312 | if (pg_offset) { |
| 1313 | arg.offset -= pg_offset; |
| 1314 | arg.length += pg_offset; |
| 1315 | } |
Andy Adamson | 7c24d94 | 2011-06-13 18:22:38 -0400 | [diff] [blame] | 1316 | if (arg.length != NFS4_MAX_UINT64) |
| 1317 | arg.length = PAGE_CACHE_ALIGN(arg.length); |
Benny Halevy | 707ed5f | 2011-05-22 19:47:46 +0300 | [diff] [blame] | 1318 | |
Benny Halevy | fb3296e | 2011-05-22 19:47:26 +0300 | [diff] [blame] | 1319 | lseg = send_layoutget(lo, ctx, &arg, gfp_flags); |
Fred Isaman | cf7d63f | 2011-01-06 11:36:25 +0000 | [diff] [blame] | 1320 | atomic_dec(&lo->plh_outstanding); |
Trond Myklebust | 830ffb5 | 2012-09-20 21:25:19 -0400 | [diff] [blame] | 1321 | out_put_layout_hdr: |
Trond Myklebust | 70c3bd2 | 2012-09-18 20:51:13 -0400 | [diff] [blame] | 1322 | pnfs_put_layout_hdr(lo); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1323 | out: |
Trond Myklebust | f86bbcf | 2012-09-26 11:21:40 -0400 | [diff] [blame] | 1324 | dprintk("%s: inode %s/%llu pNFS layout segment %s for " |
| 1325 | "(%s, offset: %llu, length: %llu)\n", |
| 1326 | __func__, ino->i_sb->s_id, |
| 1327 | (unsigned long long)NFS_FILEID(ino), |
| 1328 | lseg == NULL ? "not found" : "found", |
| 1329 | iomode==IOMODE_RW ? "read/write" : "read-only", |
| 1330 | (unsigned long long)pos, |
| 1331 | (unsigned long long)count); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1332 | return lseg; |
| 1333 | out_unlock: |
| 1334 | spin_unlock(&ino->i_lock); |
Trond Myklebust | 830ffb5 | 2012-09-20 21:25:19 -0400 | [diff] [blame] | 1335 | goto out_put_layout_hdr; |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1336 | } |
Andy Adamson | 7c24d94 | 2011-06-13 18:22:38 -0400 | [diff] [blame] | 1337 | EXPORT_SYMBOL_GPL(pnfs_update_layout); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1338 | |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 1339 | struct pnfs_layout_segment * |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1340 | pnfs_layout_process(struct nfs4_layoutget *lgp) |
| 1341 | { |
| 1342 | struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout; |
| 1343 | struct nfs4_layoutget_res *res = &lgp->res; |
| 1344 | struct pnfs_layout_segment *lseg; |
Fred Isaman | b7edfaa | 2011-01-06 11:36:21 +0000 | [diff] [blame] | 1345 | struct inode *ino = lo->plh_inode; |
Trond Myklebust | 78096cc | 2014-02-12 10:02:27 -0500 | [diff] [blame] | 1346 | LIST_HEAD(free_me); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1347 | int status = 0; |
| 1348 | |
| 1349 | /* Inject layout blob into I/O device driver */ |
Trond Myklebust | a75b9df | 2011-05-11 18:00:51 -0400 | [diff] [blame] | 1350 | 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] | 1351 | if (!lseg || IS_ERR(lseg)) { |
| 1352 | if (!lseg) |
| 1353 | status = -ENOMEM; |
| 1354 | else |
| 1355 | status = PTR_ERR(lseg); |
| 1356 | dprintk("%s: Could not allocate layout: error %d\n", |
| 1357 | __func__, status); |
| 1358 | goto out; |
| 1359 | } |
| 1360 | |
| 1361 | spin_lock(&ino->i_lock); |
Trond Myklebust | a59c30a | 2012-03-01 11:17:47 -0500 | [diff] [blame] | 1362 | if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 1363 | dprintk("%s forget reply due to recall\n", __func__); |
| 1364 | goto out_forget_reply; |
| 1365 | } |
| 1366 | |
Trond Myklebust | 19c54ab | 2012-10-05 16:56:58 -0700 | [diff] [blame] | 1367 | if (pnfs_layoutgets_blocked(lo, 1) || |
| 1368 | pnfs_layout_stateid_blocked(lo, &res->stateid)) { |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 1369 | dprintk("%s forget reply due to state\n", __func__); |
| 1370 | goto out_forget_reply; |
| 1371 | } |
Trond Myklebust | 038d649 | 2012-10-02 16:38:41 -0700 | [diff] [blame] | 1372 | |
Trond Myklebust | 78096cc | 2014-02-12 10:02:27 -0500 | [diff] [blame] | 1373 | /* Check that the new stateid matches the old stateid */ |
| 1374 | pnfs_verify_layout_stateid(lo, &res->stateid, &free_me); |
Trond Myklebust | 038d649 | 2012-10-02 16:38:41 -0700 | [diff] [blame] | 1375 | /* Done processing layoutget. Set the layout stateid */ |
| 1376 | pnfs_set_layout_stateid(lo, &res->stateid, false); |
| 1377 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1378 | init_lseg(lo, lseg); |
Fred Isaman | 566052c | 2011-01-06 11:36:20 +0000 | [diff] [blame] | 1379 | lseg->pls_range = res->range; |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1380 | pnfs_get_lseg(lseg); |
Trond Myklebust | 57036a3 | 2012-09-20 16:33:30 -0400 | [diff] [blame] | 1381 | pnfs_layout_insert_lseg(lo, lseg); |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1382 | |
Fred Isaman | f7e8917 | 2011-01-06 11:36:32 +0000 | [diff] [blame] | 1383 | if (res->return_on_close) { |
| 1384 | set_bit(NFS_LSEG_ROC, &lseg->pls_flags); |
| 1385 | set_bit(NFS_LAYOUT_ROC, &lo->plh_flags); |
| 1386 | } |
| 1387 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1388 | spin_unlock(&ino->i_lock); |
Trond Myklebust | 78096cc | 2014-02-12 10:02:27 -0500 | [diff] [blame] | 1389 | pnfs_free_lseg_list(&free_me); |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 1390 | return lseg; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1391 | out: |
Trond Myklebust | a0b0a6e | 2012-09-17 17:12:15 -0400 | [diff] [blame] | 1392 | return ERR_PTR(status); |
Fred Isaman | 43f1b3d | 2011-01-06 11:36:30 +0000 | [diff] [blame] | 1393 | |
| 1394 | out_forget_reply: |
| 1395 | spin_unlock(&ino->i_lock); |
| 1396 | lseg->pls_layout = lo; |
| 1397 | NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); |
| 1398 | goto out; |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1399 | } |
| 1400 | |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1401 | void |
| 1402 | pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) |
| 1403 | { |
Peng Tao | 1fd937b | 2012-09-25 14:55:57 +0800 | [diff] [blame] | 1404 | u64 rd_size = req->wb_bytes; |
| 1405 | |
Trond Myklebust | bc5a89b | 2012-10-15 14:58:04 -0400 | [diff] [blame] | 1406 | WARN_ON_ONCE(pgio->pg_lseg != NULL); |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1407 | |
Peng Tao | 1fd937b | 2012-09-25 14:55:57 +0800 | [diff] [blame] | 1408 | if (pgio->pg_dreq == NULL) |
| 1409 | rd_size = i_size_read(pgio->pg_inode) - req_offset(req); |
| 1410 | else |
| 1411 | rd_size = nfs_dreq_bytes_left(pgio->pg_dreq); |
| 1412 | |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1413 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
| 1414 | req->wb_context, |
| 1415 | req_offset(req), |
Peng Tao | 1fd937b | 2012-09-25 14:55:57 +0800 | [diff] [blame] | 1416 | rd_size, |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1417 | IOMODE_READ, |
| 1418 | GFP_KERNEL); |
Trond Myklebust | e885de1 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1419 | /* If no lseg, fall back to read through mds */ |
| 1420 | if (pgio->pg_lseg == NULL) |
Trond Myklebust | 1f94535 | 2011-07-13 15:59:57 -0400 | [diff] [blame] | 1421 | nfs_pageio_reset_read_mds(pgio); |
Trond Myklebust | e885de1 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1422 | |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1423 | } |
| 1424 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_read); |
| 1425 | |
| 1426 | void |
Peng Tao | 6296556 | 2012-09-25 14:55:57 +0800 | [diff] [blame] | 1427 | pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, |
| 1428 | struct nfs_page *req, u64 wb_size) |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1429 | { |
Trond Myklebust | bc5a89b | 2012-10-15 14:58:04 -0400 | [diff] [blame] | 1430 | WARN_ON_ONCE(pgio->pg_lseg != NULL); |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1431 | |
| 1432 | pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, |
| 1433 | req->wb_context, |
| 1434 | req_offset(req), |
Peng Tao | 6296556 | 2012-09-25 14:55:57 +0800 | [diff] [blame] | 1435 | wb_size, |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1436 | IOMODE_RW, |
| 1437 | GFP_NOFS); |
Trond Myklebust | e885de1 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1438 | /* If no lseg, fall back to write through mds */ |
| 1439 | if (pgio->pg_lseg == NULL) |
Trond Myklebust | 1f94535 | 2011-07-13 15:59:57 -0400 | [diff] [blame] | 1440 | nfs_pageio_reset_write_mds(pgio); |
Trond Myklebust | d8007d4 | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1441 | } |
| 1442 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_write); |
| 1443 | |
Weston Andros Adamson | b4fdac1 | 2014-05-15 11:56:43 -0400 | [diff] [blame] | 1444 | /* |
| 1445 | * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number |
| 1446 | * of bytes (maximum @req->wb_bytes) that can be coalesced. |
| 1447 | */ |
| 1448 | size_t |
Benny Halevy | dfed206 | 2011-05-25 20:25:22 +0300 | [diff] [blame] | 1449 | pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, |
| 1450 | struct nfs_page *req) |
Fred Isaman | bae724e | 2011-03-01 01:34:15 +0000 | [diff] [blame] | 1451 | { |
Weston Andros Adamson | 0f9c429 | 2014-05-15 11:56:51 -0400 | [diff] [blame] | 1452 | unsigned int size; |
Weston Andros Adamson | c5e20cb | 2014-06-09 17:47:26 -0400 | [diff] [blame] | 1453 | u64 seg_end, req_start, seg_left; |
Weston Andros Adamson | 0f9c429 | 2014-05-15 11:56:51 -0400 | [diff] [blame] | 1454 | |
| 1455 | size = nfs_generic_pg_test(pgio, prev, req); |
Weston Andros Adamson | 0f9c429 | 2014-05-15 11:56:51 -0400 | [diff] [blame] | 1456 | if (!size) |
| 1457 | return 0; |
Benny Halevy | 89a58e3 | 2011-05-25 20:54:40 +0300 | [diff] [blame] | 1458 | |
Trond Myklebust | 19982ba | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1459 | /* |
Weston Andros Adamson | c5e20cb | 2014-06-09 17:47:26 -0400 | [diff] [blame] | 1460 | * 'size' contains the number of bytes left in the current page (up |
| 1461 | * to the original size asked for in @req->wb_bytes). |
| 1462 | * |
| 1463 | * Calculate how many bytes are left in the layout segment |
| 1464 | * and if there are less bytes than 'size', return that instead. |
Trond Myklebust | 19982ba | 2011-06-10 13:30:23 -0400 | [diff] [blame] | 1465 | * |
| 1466 | * Please also note that 'end_offset' is actually the offset of the |
| 1467 | * first byte that lies outside the pnfs_layout_range. FIXME? |
| 1468 | * |
| 1469 | */ |
Weston Andros Adamson | 19b5484 | 2014-05-15 11:56:55 -0400 | [diff] [blame] | 1470 | if (pgio->pg_lseg) { |
Weston Andros Adamson | c5e20cb | 2014-06-09 17:47:26 -0400 | [diff] [blame] | 1471 | seg_end = end_offset(pgio->pg_lseg->pls_range.offset, |
| 1472 | pgio->pg_lseg->pls_range.length); |
| 1473 | req_start = req_offset(req); |
| 1474 | WARN_ON_ONCE(req_start > seg_end); |
| 1475 | /* start of request is past the last byte of this segment */ |
| 1476 | if (req_start >= seg_end) |
Weston Andros Adamson | 19b5484 | 2014-05-15 11:56:55 -0400 | [diff] [blame] | 1477 | return 0; |
Weston Andros Adamson | c5e20cb | 2014-06-09 17:47:26 -0400 | [diff] [blame] | 1478 | |
| 1479 | /* adjust 'size' iff there are fewer bytes left in the |
| 1480 | * segment than what nfs_generic_pg_test returned */ |
| 1481 | seg_left = seg_end - req_start; |
| 1482 | if (seg_left < size) |
| 1483 | size = (unsigned int)seg_left; |
Weston Andros Adamson | 19b5484 | 2014-05-15 11:56:55 -0400 | [diff] [blame] | 1484 | } |
Weston Andros Adamson | 0f9c429 | 2014-05-15 11:56:51 -0400 | [diff] [blame] | 1485 | |
Weston Andros Adamson | 19b5484 | 2014-05-15 11:56:55 -0400 | [diff] [blame] | 1486 | return size; |
Fred Isaman | bae724e | 2011-03-01 01:34:15 +0000 | [diff] [blame] | 1487 | } |
Benny Halevy | 89a58e3 | 2011-05-25 20:54:40 +0300 | [diff] [blame] | 1488 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_test); |
Fred Isaman | bae724e | 2011-03-01 01:34:15 +0000 | [diff] [blame] | 1489 | |
Weston Andros Adamson | 53113ad | 2014-06-09 11:48:38 -0400 | [diff] [blame] | 1490 | int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *hdr) |
Trond Myklebust | e2fecb2 | 2012-01-06 08:57:46 -0500 | [diff] [blame] | 1491 | { |
| 1492 | struct nfs_pageio_descriptor pgio; |
Trond Myklebust | e2fecb2 | 2012-01-06 08:57:46 -0500 | [diff] [blame] | 1493 | |
| 1494 | /* Resend all requests through the MDS */ |
Weston Andros Adamson | 53113ad | 2014-06-09 11:48:38 -0400 | [diff] [blame] | 1495 | nfs_pageio_init_write(&pgio, hdr->inode, FLUSH_STABLE, true, |
| 1496 | hdr->completion_ops); |
| 1497 | return nfs_pageio_resend(&pgio, hdr); |
Trond Myklebust | e2fecb2 | 2012-01-06 08:57:46 -0500 | [diff] [blame] | 1498 | } |
Andy Adamson | e7dd79af | 2012-04-27 17:53:46 -0400 | [diff] [blame] | 1499 | EXPORT_SYMBOL_GPL(pnfs_write_done_resend_to_mds); |
Trond Myklebust | e2fecb2 | 2012-01-06 08:57:46 -0500 | [diff] [blame] | 1500 | |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1501 | static void pnfs_ld_handle_write_error(struct nfs_pgio_header *hdr) |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1502 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1503 | |
| 1504 | dprintk("pnfs write error = %d\n", hdr->pnfs_error); |
| 1505 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1506 | PNFS_LAYOUTRET_ON_ERROR) { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1507 | pnfs_return_layout(hdr->inode); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1508 | } |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1509 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
Weston Andros Adamson | 53113ad | 2014-06-09 11:48:38 -0400 | [diff] [blame] | 1510 | hdr->task.tk_status = pnfs_write_done_resend_to_mds(hdr); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1511 | } |
| 1512 | |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1513 | /* |
| 1514 | * Called by non rpc-based layout drivers |
| 1515 | */ |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1516 | void pnfs_ld_write_done(struct nfs_pgio_header *hdr) |
Fred Isaman | 94ad1c8 | 2011-03-01 01:34:14 +0000 | [diff] [blame] | 1517 | { |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1518 | trace_nfs4_pnfs_write(hdr, hdr->pnfs_error); |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1519 | if (!hdr->pnfs_error) { |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1520 | pnfs_set_layoutcommit(hdr); |
| 1521 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1522 | } else |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1523 | pnfs_ld_handle_write_error(hdr); |
| 1524 | hdr->mds_ops->rpc_release(hdr); |
Fred Isaman | 44b8379 | 2011-03-03 15:13:44 +0000 | [diff] [blame] | 1525 | } |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1526 | EXPORT_SYMBOL_GPL(pnfs_ld_write_done); |
Fred Isaman | 44b8379 | 2011-03-03 15:13:44 +0000 | [diff] [blame] | 1527 | |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1528 | static void |
| 1529 | pnfs_write_through_mds(struct nfs_pageio_descriptor *desc, |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1530 | struct nfs_pgio_header *hdr) |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1531 | { |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1532 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
| 1533 | list_splice_tail_init(&hdr->pages, &desc->pg_list); |
| 1534 | nfs_pageio_reset_write_mds(desc); |
| 1535 | desc->pg_recoalesce = 1; |
| 1536 | } |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1537 | nfs_pgio_data_destroy(hdr); |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1538 | } |
| 1539 | |
| 1540 | static enum pnfs_try_status |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1541 | pnfs_try_to_write_data(struct nfs_pgio_header *hdr, |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1542 | const struct rpc_call_ops *call_ops, |
| 1543 | struct pnfs_layout_segment *lseg, |
| 1544 | int how) |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1545 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1546 | struct inode *inode = hdr->inode; |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1547 | enum pnfs_try_status trypnfs; |
| 1548 | struct nfs_server *nfss = NFS_SERVER(inode); |
| 1549 | |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1550 | hdr->mds_ops = call_ops; |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1551 | |
| 1552 | dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__, |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1553 | inode->i_ino, hdr->args.count, hdr->args.offset, how); |
| 1554 | trypnfs = nfss->pnfs_curr_ld->write_pagelist(hdr, how); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1555 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1556 | nfs_inc_stats(inode, NFSIOS_PNFS_WRITE); |
Andy Adamson | 0382b74 | 2011-03-03 15:13:45 +0000 | [diff] [blame] | 1557 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
| 1558 | return trypnfs; |
| 1559 | } |
| 1560 | |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1561 | static void |
Weston Andros Adamson | 7f71472 | 2014-05-15 11:56:53 -0400 | [diff] [blame] | 1562 | pnfs_do_write(struct nfs_pageio_descriptor *desc, |
| 1563 | struct nfs_pgio_header *hdr, int how) |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1564 | { |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1565 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
| 1566 | struct pnfs_layout_segment *lseg = desc->pg_lseg; |
Weston Andros Adamson | 7f71472 | 2014-05-15 11:56:53 -0400 | [diff] [blame] | 1567 | enum pnfs_try_status trypnfs; |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1568 | |
| 1569 | desc->pg_lseg = NULL; |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1570 | trypnfs = pnfs_try_to_write_data(hdr, call_ops, lseg, how); |
Weston Andros Adamson | 7f71472 | 2014-05-15 11:56:53 -0400 | [diff] [blame] | 1571 | if (trypnfs == PNFS_NOT_ATTEMPTED) |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1572 | pnfs_write_through_mds(desc, hdr); |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1573 | pnfs_put_lseg(lseg); |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1574 | } |
| 1575 | |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1576 | static void pnfs_writehdr_free(struct nfs_pgio_header *hdr) |
| 1577 | { |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1578 | pnfs_put_lseg(hdr->lseg); |
Weston Andros Adamson | 1e7f3a4 | 2014-06-09 11:48:33 -0400 | [diff] [blame] | 1579 | nfs_pgio_header_free(hdr); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1580 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1581 | EXPORT_SYMBOL_GPL(pnfs_writehdr_free); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1582 | |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1583 | int |
| 1584 | pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) |
| 1585 | { |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1586 | struct nfs_pgio_header *hdr; |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1587 | int ret; |
| 1588 | |
Weston Andros Adamson | 1e7f3a4 | 2014-06-09 11:48:33 -0400 | [diff] [blame] | 1589 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
| 1590 | if (!hdr) { |
Trond Myklebust | 9b5415b | 2012-04-27 14:31:47 -0400 | [diff] [blame] | 1591 | desc->pg_completion_ops->error_cleanup(&desc->pg_list); |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1592 | pnfs_put_lseg(desc->pg_lseg); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1593 | desc->pg_lseg = NULL; |
| 1594 | return -ENOMEM; |
| 1595 | } |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1596 | nfs_pgheader_init(desc, hdr, pnfs_writehdr_free); |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1597 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
Anna Schumaker | ef2c488 | 2014-05-06 09:12:36 -0400 | [diff] [blame] | 1598 | ret = nfs_generic_pgio(desc, hdr); |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1599 | if (ret != 0) { |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1600 | pnfs_put_lseg(desc->pg_lseg); |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1601 | desc->pg_lseg = NULL; |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1602 | } else |
Weston Andros Adamson | 7f71472 | 2014-05-15 11:56:53 -0400 | [diff] [blame] | 1603 | pnfs_do_write(desc, hdr, desc->pg_ioflags); |
Fred Isaman | 6c75dc0 | 2012-04-20 14:47:47 -0400 | [diff] [blame] | 1604 | return ret; |
Trond Myklebust | dce8129 | 2011-07-13 15:59:19 -0400 | [diff] [blame] | 1605 | } |
| 1606 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages); |
| 1607 | |
Weston Andros Adamson | 53113ad | 2014-06-09 11:48:38 -0400 | [diff] [blame] | 1608 | int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *hdr) |
Trond Myklebust | 62e4a76 | 2011-11-10 14:30:37 -0500 | [diff] [blame] | 1609 | { |
| 1610 | struct nfs_pageio_descriptor pgio; |
| 1611 | |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1612 | /* Resend all requests through the MDS */ |
Weston Andros Adamson | 53113ad | 2014-06-09 11:48:38 -0400 | [diff] [blame] | 1613 | nfs_pageio_init_read(&pgio, hdr->inode, true, hdr->completion_ops); |
| 1614 | return nfs_pageio_resend(&pgio, hdr); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1615 | } |
Andy Adamson | e7dd79af | 2012-04-27 17:53:46 -0400 | [diff] [blame] | 1616 | EXPORT_SYMBOL_GPL(pnfs_read_done_resend_to_mds); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1617 | |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1618 | static void pnfs_ld_handle_read_error(struct nfs_pgio_header *hdr) |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1619 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1620 | dprintk("pnfs read error = %d\n", hdr->pnfs_error); |
| 1621 | if (NFS_SERVER(hdr->inode)->pnfs_curr_ld->flags & |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1622 | PNFS_LAYOUTRET_ON_ERROR) { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1623 | pnfs_return_layout(hdr->inode); |
Fred Isaman | 1acbbb4e1 | 2012-04-20 14:47:37 -0400 | [diff] [blame] | 1624 | } |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1625 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) |
Weston Andros Adamson | 53113ad | 2014-06-09 11:48:38 -0400 | [diff] [blame] | 1626 | hdr->task.tk_status = pnfs_read_done_resend_to_mds(hdr); |
Trond Myklebust | 62e4a76 | 2011-11-10 14:30:37 -0500 | [diff] [blame] | 1627 | } |
| 1628 | |
Andy Adamson | b1f69b7 | 2010-10-20 00:18:03 -0400 | [diff] [blame] | 1629 | /* |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1630 | * Called by non rpc-based layout drivers |
| 1631 | */ |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1632 | void pnfs_ld_read_done(struct nfs_pgio_header *hdr) |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1633 | { |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1634 | trace_nfs4_pnfs_read(hdr, hdr->pnfs_error); |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1635 | if (likely(!hdr->pnfs_error)) { |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1636 | __nfs4_read_done_cb(hdr); |
| 1637 | hdr->mds_ops->rpc_call_done(&hdr->task, hdr); |
Trond Myklebust | 62e4a76 | 2011-11-10 14:30:37 -0500 | [diff] [blame] | 1638 | } else |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1639 | pnfs_ld_handle_read_error(hdr); |
| 1640 | hdr->mds_ops->rpc_release(hdr); |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1641 | } |
| 1642 | EXPORT_SYMBOL_GPL(pnfs_ld_read_done); |
| 1643 | |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1644 | static void |
| 1645 | pnfs_read_through_mds(struct nfs_pageio_descriptor *desc, |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1646 | struct nfs_pgio_header *hdr) |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1647 | { |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1648 | if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) { |
| 1649 | list_splice_tail_init(&hdr->pages, &desc->pg_list); |
| 1650 | nfs_pageio_reset_read_mds(desc); |
| 1651 | desc->pg_recoalesce = 1; |
| 1652 | } |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1653 | nfs_pgio_data_destroy(hdr); |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1654 | } |
| 1655 | |
Benny Halevy | d20581a | 2011-05-22 19:52:03 +0300 | [diff] [blame] | 1656 | /* |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1657 | * Call the appropriate parallel I/O subsystem read function. |
| 1658 | */ |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1659 | static enum pnfs_try_status |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1660 | pnfs_try_to_read_data(struct nfs_pgio_header *hdr, |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1661 | const struct rpc_call_ops *call_ops, |
| 1662 | struct pnfs_layout_segment *lseg) |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1663 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1664 | struct inode *inode = hdr->inode; |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1665 | struct nfs_server *nfss = NFS_SERVER(inode); |
| 1666 | enum pnfs_try_status trypnfs; |
| 1667 | |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1668 | hdr->mds_ops = call_ops; |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1669 | |
| 1670 | dprintk("%s: Reading ino:%lu %u@%llu\n", |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1671 | __func__, inode->i_ino, hdr->args.count, hdr->args.offset); |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1672 | |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1673 | trypnfs = nfss->pnfs_curr_ld->read_pagelist(hdr); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1674 | if (trypnfs != PNFS_NOT_ATTEMPTED) |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1675 | nfs_inc_stats(inode, NFSIOS_PNFS_READ); |
Andy Adamson | 64419a9 | 2011-03-01 01:34:16 +0000 | [diff] [blame] | 1676 | dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); |
| 1677 | return trypnfs; |
| 1678 | } |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1679 | |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1680 | static void |
Weston Andros Adamson | 7f71472 | 2014-05-15 11:56:53 -0400 | [diff] [blame] | 1681 | pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr) |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1682 | { |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1683 | const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; |
| 1684 | struct pnfs_layout_segment *lseg = desc->pg_lseg; |
Weston Andros Adamson | 7f71472 | 2014-05-15 11:56:53 -0400 | [diff] [blame] | 1685 | enum pnfs_try_status trypnfs; |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1686 | |
| 1687 | desc->pg_lseg = NULL; |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1688 | trypnfs = pnfs_try_to_read_data(hdr, call_ops, lseg); |
Weston Andros Adamson | 7f71472 | 2014-05-15 11:56:53 -0400 | [diff] [blame] | 1689 | if (trypnfs == PNFS_NOT_ATTEMPTED) |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1690 | pnfs_read_through_mds(desc, hdr); |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1691 | pnfs_put_lseg(lseg); |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1692 | } |
| 1693 | |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1694 | static void pnfs_readhdr_free(struct nfs_pgio_header *hdr) |
| 1695 | { |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1696 | pnfs_put_lseg(hdr->lseg); |
Weston Andros Adamson | 1e7f3a4 | 2014-06-09 11:48:33 -0400 | [diff] [blame] | 1697 | nfs_pgio_header_free(hdr); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1698 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1699 | EXPORT_SYMBOL_GPL(pnfs_readhdr_free); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1700 | |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1701 | int |
| 1702 | pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc) |
| 1703 | { |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1704 | struct nfs_pgio_header *hdr; |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1705 | int ret; |
| 1706 | |
Weston Andros Adamson | 1e7f3a4 | 2014-06-09 11:48:33 -0400 | [diff] [blame] | 1707 | hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); |
| 1708 | if (!hdr) { |
Fred Isaman | 061ae2e | 2012-04-20 14:47:48 -0400 | [diff] [blame] | 1709 | desc->pg_completion_ops->error_cleanup(&desc->pg_list); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1710 | ret = -ENOMEM; |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1711 | pnfs_put_lseg(desc->pg_lseg); |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1712 | desc->pg_lseg = NULL; |
| 1713 | return ret; |
| 1714 | } |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1715 | nfs_pgheader_init(desc, hdr, pnfs_readhdr_free); |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1716 | hdr->lseg = pnfs_get_lseg(desc->pg_lseg); |
Anna Schumaker | ef2c488 | 2014-05-06 09:12:36 -0400 | [diff] [blame] | 1717 | ret = nfs_generic_pgio(desc, hdr); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1718 | if (ret != 0) { |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1719 | pnfs_put_lseg(desc->pg_lseg); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1720 | desc->pg_lseg = NULL; |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1721 | } else |
Weston Andros Adamson | 7f71472 | 2014-05-15 11:56:53 -0400 | [diff] [blame] | 1722 | pnfs_do_read(desc, hdr); |
Fred Isaman | 4db6e0b | 2012-04-20 14:47:46 -0400 | [diff] [blame] | 1723 | return ret; |
Trond Myklebust | 493292d | 2011-07-13 15:58:28 -0400 | [diff] [blame] | 1724 | } |
| 1725 | EXPORT_SYMBOL_GPL(pnfs_generic_pg_readpages); |
| 1726 | |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 1727 | static void pnfs_clear_layoutcommitting(struct inode *inode) |
| 1728 | { |
| 1729 | unsigned long *bitlock = &NFS_I(inode)->flags; |
| 1730 | |
| 1731 | clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock); |
Peter Zijlstra | 4e857c5 | 2014-03-17 18:06:10 +0100 | [diff] [blame] | 1732 | smp_mb__after_atomic(); |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 1733 | wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING); |
| 1734 | } |
| 1735 | |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1736 | /* |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1737 | * There can be multiple RW segments. |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1738 | */ |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1739 | 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] | 1740 | { |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1741 | struct pnfs_layout_segment *lseg; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1742 | |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1743 | list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list) { |
| 1744 | if (lseg->pls_range.iomode == IOMODE_RW && |
Trond Myklebust | a073dbf | 2013-03-20 12:34:32 -0400 | [diff] [blame] | 1745 | test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, &lseg->pls_flags)) |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1746 | list_add(&lseg->pls_lc_list, listp); |
| 1747 | } |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1748 | } |
| 1749 | |
Trond Myklebust | a073dbf | 2013-03-20 12:34:32 -0400 | [diff] [blame] | 1750 | static void pnfs_list_write_lseg_done(struct inode *inode, struct list_head *listp) |
| 1751 | { |
| 1752 | struct pnfs_layout_segment *lseg, *tmp; |
Trond Myklebust | a073dbf | 2013-03-20 12:34:32 -0400 | [diff] [blame] | 1753 | |
| 1754 | /* Matched by references in pnfs_set_layoutcommit */ |
| 1755 | list_for_each_entry_safe(lseg, tmp, listp, pls_lc_list) { |
| 1756 | list_del_init(&lseg->pls_lc_list); |
| 1757 | pnfs_put_lseg(lseg); |
| 1758 | } |
| 1759 | |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 1760 | pnfs_clear_layoutcommitting(inode); |
Trond Myklebust | a073dbf | 2013-03-20 12:34:32 -0400 | [diff] [blame] | 1761 | } |
| 1762 | |
Peng Tao | 1b0ae06 | 2011-09-22 21:50:12 -0400 | [diff] [blame] | 1763 | void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg) |
| 1764 | { |
Trond Myklebust | b9e028f | 2012-09-18 16:41:18 -0400 | [diff] [blame] | 1765 | pnfs_layout_io_set_failed(lseg->pls_layout, lseg->pls_range.iomode); |
Peng Tao | 1b0ae06 | 2011-09-22 21:50:12 -0400 | [diff] [blame] | 1766 | } |
| 1767 | EXPORT_SYMBOL_GPL(pnfs_set_lo_fail); |
| 1768 | |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1769 | void |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1770 | pnfs_set_layoutcommit(struct nfs_pgio_header *hdr) |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1771 | { |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1772 | struct inode *inode = hdr->inode; |
| 1773 | struct nfs_inode *nfsi = NFS_I(inode); |
Weston Andros Adamson | d45f60c | 2014-06-09 11:48:35 -0400 | [diff] [blame] | 1774 | loff_t end_pos = hdr->mds_offset + hdr->res.count; |
Weston Andros Adamson | 79a48a1 | 2011-04-13 10:53:51 -0400 | [diff] [blame] | 1775 | bool mark_as_dirty = false; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1776 | |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1777 | spin_lock(&inode->i_lock); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1778 | if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) { |
Weston Andros Adamson | 79a48a1 | 2011-04-13 10:53:51 -0400 | [diff] [blame] | 1779 | mark_as_dirty = true; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1780 | dprintk("%s: Set layoutcommit for inode %lu ", |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1781 | __func__, inode->i_ino); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1782 | } |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1783 | if (!test_and_set_bit(NFS_LSEG_LAYOUTCOMMIT, &hdr->lseg->pls_flags)) { |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1784 | /* references matched in nfs4_layoutcommit_release */ |
Trond Myklebust | 9369a43 | 2012-09-18 20:57:08 -0400 | [diff] [blame] | 1785 | pnfs_get_lseg(hdr->lseg); |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1786 | } |
Peng Tao | acff5880 | 2011-07-30 20:52:31 -0400 | [diff] [blame] | 1787 | if (end_pos > nfsi->layout->plh_lwb) |
| 1788 | nfsi->layout->plh_lwb = end_pos; |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1789 | spin_unlock(&inode->i_lock); |
Peng Tao | acff5880 | 2011-07-30 20:52:31 -0400 | [diff] [blame] | 1790 | dprintk("%s: lseg %p end_pos %llu\n", |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1791 | __func__, hdr->lseg, nfsi->layout->plh_lwb); |
Weston Andros Adamson | 79a48a1 | 2011-04-13 10:53:51 -0400 | [diff] [blame] | 1792 | |
| 1793 | /* if pnfs_layoutcommit_inode() runs between inode locks, the next one |
| 1794 | * will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */ |
| 1795 | if (mark_as_dirty) |
Fred Isaman | cd84160 | 2012-04-20 14:47:44 -0400 | [diff] [blame] | 1796 | mark_inode_dirty_sync(inode); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1797 | } |
| 1798 | EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit); |
| 1799 | |
Andy Adamson | db29c08 | 2011-07-30 20:52:38 -0400 | [diff] [blame] | 1800 | void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data) |
| 1801 | { |
| 1802 | struct nfs_server *nfss = NFS_SERVER(data->args.inode); |
| 1803 | |
| 1804 | if (nfss->pnfs_curr_ld->cleanup_layoutcommit) |
| 1805 | nfss->pnfs_curr_ld->cleanup_layoutcommit(data); |
Trond Myklebust | a073dbf | 2013-03-20 12:34:32 -0400 | [diff] [blame] | 1806 | pnfs_list_write_lseg_done(data->args.inode, &data->lseg_list); |
Andy Adamson | db29c08 | 2011-07-30 20:52:38 -0400 | [diff] [blame] | 1807 | } |
| 1808 | |
Andy Adamson | de4b15c | 2011-03-12 02:58:09 -0500 | [diff] [blame] | 1809 | /* |
| 1810 | * For the LAYOUT4_NFSV4_1_FILES layout type, NFS_DATA_SYNC WRITEs and |
| 1811 | * NFS_UNSTABLE WRITEs with a COMMIT to data servers must store enough |
| 1812 | * data to disk to allow the server to recover the data if it crashes. |
| 1813 | * LAYOUTCOMMIT is only needed when the NFL4_UFLG_COMMIT_THRU_MDS flag |
| 1814 | * is off, and a COMMIT is sent to a data server, or |
| 1815 | * if WRITEs to a data server return NFS_DATA_SYNC. |
| 1816 | */ |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1817 | int |
Andy Adamson | ef31153 | 2011-03-12 02:58:10 -0500 | [diff] [blame] | 1818 | pnfs_layoutcommit_inode(struct inode *inode, bool sync) |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1819 | { |
| 1820 | struct nfs4_layoutcommit_data *data; |
| 1821 | struct nfs_inode *nfsi = NFS_I(inode); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1822 | loff_t end_pos; |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 1823 | int status; |
| 1824 | |
| 1825 | if (!pnfs_layoutcommit_outstanding(inode)) |
| 1826 | return 0; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1827 | |
| 1828 | dprintk("--> %s inode %lu\n", __func__, inode->i_ino); |
| 1829 | |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 1830 | status = -EAGAIN; |
| 1831 | if (test_and_set_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags)) { |
| 1832 | if (!sync) |
| 1833 | goto out; |
NeilBrown | 7431620 | 2014-07-07 15:16:04 +1000 | [diff] [blame] | 1834 | status = wait_on_bit_lock_action(&nfsi->flags, |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 1835 | NFS_INO_LAYOUTCOMMITTING, |
| 1836 | nfs_wait_bit_killable, |
| 1837 | TASK_KILLABLE); |
| 1838 | if (status) |
| 1839 | goto out; |
| 1840 | } |
Andy Adamson | de4b15c | 2011-03-12 02:58:09 -0500 | [diff] [blame] | 1841 | |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 1842 | status = -ENOMEM; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1843 | /* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */ |
| 1844 | data = kzalloc(sizeof(*data), GFP_NOFS); |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 1845 | if (!data) |
| 1846 | goto clear_layoutcommitting; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1847 | |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 1848 | status = 0; |
| 1849 | spin_lock(&inode->i_lock); |
| 1850 | if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) |
| 1851 | goto out_unlock; |
Peng Tao | 92407e7 | 2011-10-23 20:21:17 -0700 | [diff] [blame] | 1852 | |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1853 | INIT_LIST_HEAD(&data->lseg_list); |
Peng Tao | a9bae56 | 2011-07-30 20:52:33 -0400 | [diff] [blame] | 1854 | pnfs_list_write_lseg(inode, &data->lseg_list); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1855 | |
Peng Tao | acff5880 | 2011-07-30 20:52:31 -0400 | [diff] [blame] | 1856 | end_pos = nfsi->layout->plh_lwb; |
Peng Tao | acff5880 | 2011-07-30 20:52:31 -0400 | [diff] [blame] | 1857 | nfsi->layout->plh_lwb = 0; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1858 | |
Trond Myklebust | f597c53 | 2012-03-04 18:13:56 -0500 | [diff] [blame] | 1859 | nfs4_stateid_copy(&data->args.stateid, &nfsi->layout->plh_stateid); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1860 | spin_unlock(&inode->i_lock); |
| 1861 | |
| 1862 | data->args.inode = inode; |
Peng Tao | 9fa4075 | 2011-07-30 20:52:32 -0400 | [diff] [blame] | 1863 | data->cred = get_rpccred(nfsi->layout->plh_lc_cred); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1864 | nfs_fattr_init(&data->fattr); |
| 1865 | data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; |
| 1866 | data->res.fattr = &data->fattr; |
| 1867 | data->args.lastbytewritten = end_pos - 1; |
| 1868 | data->res.server = NFS_SERVER(inode); |
| 1869 | |
| 1870 | status = nfs4_proc_layoutcommit(data, sync); |
| 1871 | out: |
Peng Tao | 92407e7 | 2011-10-23 20:21:17 -0700 | [diff] [blame] | 1872 | if (status) |
| 1873 | mark_inode_dirty_sync(inode); |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1874 | dprintk("<-- %s status %d\n", __func__, status); |
| 1875 | return status; |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 1876 | out_unlock: |
| 1877 | spin_unlock(&inode->i_lock); |
Peng Tao | 92407e7 | 2011-10-23 20:21:17 -0700 | [diff] [blame] | 1878 | kfree(data); |
Trond Myklebust | 71244d9 | 2014-01-13 13:34:36 -0500 | [diff] [blame] | 1879 | clear_layoutcommitting: |
| 1880 | pnfs_clear_layoutcommitting(inode); |
Peng Tao | 92407e7 | 2011-10-23 20:21:17 -0700 | [diff] [blame] | 1881 | goto out; |
Andy Adamson | 863a3c6 | 2011-03-23 13:27:54 +0000 | [diff] [blame] | 1882 | } |
Andy Adamson | 82be417 | 2012-05-23 05:02:35 -0400 | [diff] [blame] | 1883 | |
| 1884 | struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) |
| 1885 | { |
| 1886 | struct nfs4_threshold *thp; |
| 1887 | |
| 1888 | thp = kzalloc(sizeof(*thp), GFP_NOFS); |
| 1889 | if (!thp) { |
| 1890 | dprintk("%s mdsthreshold allocation failed\n", __func__); |
| 1891 | return NULL; |
| 1892 | } |
| 1893 | return thp; |
| 1894 | } |