Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1 | /* -*- mode: c; c-basic-offset: 8; -*- |
| 2 | * vim: noexpandtab sw=8 ts=8 sts=0: |
| 3 | * |
| 4 | * slot_map.c |
| 5 | * |
| 6 | * |
| 7 | * |
| 8 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public |
| 12 | * License as published by the Free Software Foundation; either |
| 13 | * version 2 of the License, or (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public |
| 21 | * License along with this program; if not, write to the |
| 22 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 23 | * Boston, MA 021110-1307, USA. |
| 24 | */ |
| 25 | |
| 26 | #include <linux/types.h> |
| 27 | #include <linux/slab.h> |
| 28 | #include <linux/highmem.h> |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 29 | |
| 30 | #define MLOG_MASK_PREFIX ML_SUPER |
| 31 | #include <cluster/masklog.h> |
| 32 | |
| 33 | #include "ocfs2.h" |
| 34 | |
| 35 | #include "dlmglue.h" |
| 36 | #include "extent_map.h" |
| 37 | #include "heartbeat.h" |
| 38 | #include "inode.h" |
| 39 | #include "slot_map.h" |
| 40 | #include "super.h" |
| 41 | #include "sysfile.h" |
| 42 | |
| 43 | #include "buffer_head_io.h" |
| 44 | |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 45 | |
| 46 | struct ocfs2_slot { |
| 47 | int sl_valid; |
| 48 | unsigned int sl_node_num; |
| 49 | }; |
| 50 | |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 51 | struct ocfs2_slot_info { |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 52 | int si_extended; |
| 53 | int si_slots_per_block; |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 54 | struct inode *si_inode; |
Joel Becker | 1c8d9a6 | 2008-02-01 11:59:07 -0800 | [diff] [blame] | 55 | unsigned int si_blocks; |
| 56 | struct buffer_head **si_bh; |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 57 | unsigned int si_num_slots; |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 58 | struct ocfs2_slot *si_slots; |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 59 | }; |
| 60 | |
| 61 | |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 62 | static int __ocfs2_node_num_to_slot(struct ocfs2_slot_info *si, |
| 63 | unsigned int node_num); |
| 64 | |
| 65 | static void ocfs2_invalidate_slot(struct ocfs2_slot_info *si, |
| 66 | int slot_num) |
| 67 | { |
| 68 | BUG_ON((slot_num < 0) || (slot_num >= si->si_num_slots)); |
| 69 | si->si_slots[slot_num].sl_valid = 0; |
| 70 | } |
| 71 | |
| 72 | static void ocfs2_set_slot(struct ocfs2_slot_info *si, |
| 73 | int slot_num, unsigned int node_num) |
| 74 | { |
| 75 | BUG_ON((slot_num < 0) || (slot_num >= si->si_num_slots)); |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 76 | |
| 77 | si->si_slots[slot_num].sl_valid = 1; |
| 78 | si->si_slots[slot_num].sl_node_num = node_num; |
| 79 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 80 | |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 81 | /* This version is for the extended slot map */ |
| 82 | static void ocfs2_update_slot_info_extended(struct ocfs2_slot_info *si) |
| 83 | { |
| 84 | int b, i, slotno; |
| 85 | struct ocfs2_slot_map_extended *se; |
| 86 | |
| 87 | slotno = 0; |
| 88 | for (b = 0; b < si->si_blocks; b++) { |
| 89 | se = (struct ocfs2_slot_map_extended *)si->si_bh[b]->b_data; |
| 90 | for (i = 0; |
| 91 | (i < si->si_slots_per_block) && |
| 92 | (slotno < si->si_num_slots); |
| 93 | i++, slotno++) { |
| 94 | if (se->se_slots[i].es_valid) |
| 95 | ocfs2_set_slot(si, slotno, |
| 96 | le32_to_cpu(se->se_slots[i].es_node_num)); |
| 97 | else |
| 98 | ocfs2_invalidate_slot(si, slotno); |
| 99 | } |
| 100 | } |
| 101 | } |
| 102 | |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 103 | /* |
| 104 | * Post the slot information on disk into our slot_info struct. |
| 105 | * Must be protected by osb_lock. |
| 106 | */ |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 107 | static void ocfs2_update_slot_info_old(struct ocfs2_slot_info *si) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 108 | { |
| 109 | int i; |
Joel Becker | fb86b1f | 2008-02-01 11:59:05 -0800 | [diff] [blame] | 110 | struct ocfs2_slot_map *sm; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 111 | |
Joel Becker | fb86b1f | 2008-02-01 11:59:05 -0800 | [diff] [blame] | 112 | sm = (struct ocfs2_slot_map *)si->si_bh[0]->b_data; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 113 | |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 114 | for (i = 0; i < si->si_num_slots; i++) { |
Joel Becker | fb86b1f | 2008-02-01 11:59:05 -0800 | [diff] [blame] | 115 | if (le16_to_cpu(sm->sm_slots[i]) == (u16)OCFS2_INVALID_SLOT) |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 116 | ocfs2_invalidate_slot(si, i); |
| 117 | else |
Joel Becker | fb86b1f | 2008-02-01 11:59:05 -0800 | [diff] [blame] | 118 | ocfs2_set_slot(si, i, le16_to_cpu(sm->sm_slots[i])); |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 119 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 120 | } |
| 121 | |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 122 | static void ocfs2_update_slot_info(struct ocfs2_slot_info *si) |
| 123 | { |
| 124 | /* |
| 125 | * The slot data will have been refreshed when ocfs2_super_lock |
| 126 | * was taken. |
| 127 | */ |
| 128 | if (si->si_extended) |
| 129 | ocfs2_update_slot_info_extended(si); |
| 130 | else |
| 131 | ocfs2_update_slot_info_old(si); |
| 132 | } |
| 133 | |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 134 | int ocfs2_refresh_slot_info(struct ocfs2_super *osb) |
| 135 | { |
| 136 | int ret; |
| 137 | struct ocfs2_slot_info *si = osb->slot_info; |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 138 | |
| 139 | if (si == NULL) |
| 140 | return 0; |
| 141 | |
Joel Becker | 1c8d9a6 | 2008-02-01 11:59:07 -0800 | [diff] [blame] | 142 | BUG_ON(si->si_blocks == 0); |
| 143 | BUG_ON(si->si_bh == NULL); |
| 144 | |
| 145 | mlog(0, "Refreshing slot map, reading %u block(s)\n", |
| 146 | si->si_blocks); |
| 147 | |
| 148 | /* |
| 149 | * We pass -1 as blocknr because we expect all of si->si_bh to |
| 150 | * be !NULL. Thus, ocfs2_read_blocks() will ignore blocknr. If |
| 151 | * this is not true, the read of -1 (UINT64_MAX) will fail. |
| 152 | */ |
Joel Becker | d4a8c93 | 2008-10-09 17:20:34 -0700 | [diff] [blame] | 153 | ret = ocfs2_read_blocks(si->si_inode, -1, si->si_blocks, si->si_bh, |
Joel Becker | 970e493 | 2008-11-13 14:49:19 -0800 | [diff] [blame^] | 154 | OCFS2_BH_IGNORE_CACHE, NULL); |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 155 | if (ret == 0) { |
| 156 | spin_lock(&osb->osb_lock); |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 157 | ocfs2_update_slot_info(si); |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 158 | spin_unlock(&osb->osb_lock); |
| 159 | } |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 160 | |
| 161 | return ret; |
| 162 | } |
| 163 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 164 | /* post the our slot info stuff into it's destination bh and write it |
| 165 | * out. */ |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 166 | static void ocfs2_update_disk_slot_extended(struct ocfs2_slot_info *si, |
| 167 | int slot_num, |
| 168 | struct buffer_head **bh) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 169 | { |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 170 | int blkind = slot_num / si->si_slots_per_block; |
| 171 | int slotno = slot_num % si->si_slots_per_block; |
| 172 | struct ocfs2_slot_map_extended *se; |
| 173 | |
| 174 | BUG_ON(blkind >= si->si_blocks); |
| 175 | |
| 176 | se = (struct ocfs2_slot_map_extended *)si->si_bh[blkind]->b_data; |
| 177 | se->se_slots[slotno].es_valid = si->si_slots[slot_num].sl_valid; |
| 178 | if (si->si_slots[slot_num].sl_valid) |
| 179 | se->se_slots[slotno].es_node_num = |
| 180 | cpu_to_le32(si->si_slots[slot_num].sl_node_num); |
| 181 | *bh = si->si_bh[blkind]; |
| 182 | } |
| 183 | |
| 184 | static void ocfs2_update_disk_slot_old(struct ocfs2_slot_info *si, |
| 185 | int slot_num, |
| 186 | struct buffer_head **bh) |
| 187 | { |
| 188 | int i; |
Joel Becker | fb86b1f | 2008-02-01 11:59:05 -0800 | [diff] [blame] | 189 | struct ocfs2_slot_map *sm; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 190 | |
Joel Becker | fb86b1f | 2008-02-01 11:59:05 -0800 | [diff] [blame] | 191 | sm = (struct ocfs2_slot_map *)si->si_bh[0]->b_data; |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 192 | for (i = 0; i < si->si_num_slots; i++) { |
| 193 | if (si->si_slots[i].sl_valid) |
Joel Becker | fb86b1f | 2008-02-01 11:59:05 -0800 | [diff] [blame] | 194 | sm->sm_slots[i] = |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 195 | cpu_to_le16(si->si_slots[i].sl_node_num); |
| 196 | else |
Joel Becker | fb86b1f | 2008-02-01 11:59:05 -0800 | [diff] [blame] | 197 | sm->sm_slots[i] = cpu_to_le16(OCFS2_INVALID_SLOT); |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 198 | } |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 199 | *bh = si->si_bh[0]; |
| 200 | } |
| 201 | |
| 202 | static int ocfs2_update_disk_slot(struct ocfs2_super *osb, |
| 203 | struct ocfs2_slot_info *si, |
| 204 | int slot_num) |
| 205 | { |
| 206 | int status; |
| 207 | struct buffer_head *bh; |
| 208 | |
| 209 | spin_lock(&osb->osb_lock); |
| 210 | if (si->si_extended) |
| 211 | ocfs2_update_disk_slot_extended(si, slot_num, &bh); |
| 212 | else |
| 213 | ocfs2_update_disk_slot_old(si, slot_num, &bh); |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 214 | spin_unlock(&osb->osb_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 215 | |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 216 | status = ocfs2_write_block(osb, bh, si->si_inode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 217 | if (status < 0) |
| 218 | mlog_errno(status); |
| 219 | |
| 220 | return status; |
| 221 | } |
| 222 | |
Joel Becker | 1c8d9a6 | 2008-02-01 11:59:07 -0800 | [diff] [blame] | 223 | /* |
| 224 | * Calculate how many bytes are needed by the slot map. Returns |
| 225 | * an error if the slot map file is too small. |
| 226 | */ |
| 227 | static int ocfs2_slot_map_physical_size(struct ocfs2_super *osb, |
| 228 | struct inode *inode, |
| 229 | unsigned long long *bytes) |
| 230 | { |
| 231 | unsigned long long bytes_needed; |
| 232 | |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 233 | if (ocfs2_uses_extended_slot_map(osb)) { |
| 234 | bytes_needed = osb->max_slots * |
| 235 | sizeof(struct ocfs2_extended_slot); |
| 236 | } else { |
| 237 | bytes_needed = osb->max_slots * sizeof(__le16); |
| 238 | } |
Joel Becker | 1c8d9a6 | 2008-02-01 11:59:07 -0800 | [diff] [blame] | 239 | if (bytes_needed > i_size_read(inode)) { |
| 240 | mlog(ML_ERROR, |
| 241 | "Slot map file is too small! (size %llu, needed %llu)\n", |
| 242 | i_size_read(inode), bytes_needed); |
| 243 | return -ENOSPC; |
| 244 | } |
| 245 | |
| 246 | *bytes = bytes_needed; |
| 247 | return 0; |
| 248 | } |
| 249 | |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 250 | /* try to find global node in the slot info. Returns -ENOENT |
| 251 | * if nothing is found. */ |
| 252 | static int __ocfs2_node_num_to_slot(struct ocfs2_slot_info *si, |
| 253 | unsigned int node_num) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 254 | { |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 255 | int i, ret = -ENOENT; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 256 | |
| 257 | for(i = 0; i < si->si_num_slots; i++) { |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 258 | if (si->si_slots[i].sl_valid && |
| 259 | (node_num == si->si_slots[i].sl_node_num)) { |
| 260 | ret = i; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 261 | break; |
| 262 | } |
| 263 | } |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 264 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 265 | return ret; |
| 266 | } |
| 267 | |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 268 | static int __ocfs2_find_empty_slot(struct ocfs2_slot_info *si, |
| 269 | int preferred) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 270 | { |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 271 | int i, ret = -ENOSPC; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 272 | |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 273 | if ((preferred >= 0) && (preferred < si->si_num_slots)) { |
| 274 | if (!si->si_slots[preferred].sl_valid) { |
Sunil Mushran | baf4661 | 2007-06-18 17:00:24 -0700 | [diff] [blame] | 275 | ret = preferred; |
| 276 | goto out; |
| 277 | } |
| 278 | } |
| 279 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 280 | for(i = 0; i < si->si_num_slots; i++) { |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 281 | if (!si->si_slots[i].sl_valid) { |
| 282 | ret = i; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 283 | break; |
| 284 | } |
| 285 | } |
Sunil Mushran | baf4661 | 2007-06-18 17:00:24 -0700 | [diff] [blame] | 286 | out: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 287 | return ret; |
| 288 | } |
| 289 | |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 290 | int ocfs2_node_num_to_slot(struct ocfs2_super *osb, unsigned int node_num) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 291 | { |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 292 | int slot; |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 293 | struct ocfs2_slot_info *si = osb->slot_info; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 294 | |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 295 | spin_lock(&osb->osb_lock); |
| 296 | slot = __ocfs2_node_num_to_slot(si, node_num); |
| 297 | spin_unlock(&osb->osb_lock); |
| 298 | |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 299 | return slot; |
| 300 | } |
| 301 | |
| 302 | int ocfs2_slot_to_node_num_locked(struct ocfs2_super *osb, int slot_num, |
| 303 | unsigned int *node_num) |
| 304 | { |
| 305 | struct ocfs2_slot_info *si = osb->slot_info; |
| 306 | |
| 307 | assert_spin_locked(&osb->osb_lock); |
| 308 | |
| 309 | BUG_ON(slot_num < 0); |
| 310 | BUG_ON(slot_num > osb->max_slots); |
| 311 | |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 312 | if (!si->si_slots[slot_num].sl_valid) |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 313 | return -ENOENT; |
| 314 | |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 315 | *node_num = si->si_slots[slot_num].sl_node_num; |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 316 | return 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 317 | } |
| 318 | |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 319 | static void __ocfs2_free_slot_info(struct ocfs2_slot_info *si) |
| 320 | { |
Joel Becker | 1c8d9a6 | 2008-02-01 11:59:07 -0800 | [diff] [blame] | 321 | unsigned int i; |
| 322 | |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 323 | if (si == NULL) |
| 324 | return; |
| 325 | |
| 326 | if (si->si_inode) |
| 327 | iput(si->si_inode); |
Joel Becker | 1c8d9a6 | 2008-02-01 11:59:07 -0800 | [diff] [blame] | 328 | if (si->si_bh) { |
| 329 | for (i = 0; i < si->si_blocks; i++) { |
| 330 | if (si->si_bh[i]) { |
| 331 | brelse(si->si_bh[i]); |
| 332 | si->si_bh[i] = NULL; |
| 333 | } |
| 334 | } |
| 335 | kfree(si->si_bh); |
| 336 | } |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 337 | |
| 338 | kfree(si); |
| 339 | } |
| 340 | |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 341 | int ocfs2_clear_slot(struct ocfs2_super *osb, int slot_num) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 342 | { |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 343 | struct ocfs2_slot_info *si = osb->slot_info; |
| 344 | |
| 345 | if (si == NULL) |
| 346 | return 0; |
| 347 | |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 348 | spin_lock(&osb->osb_lock); |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 349 | ocfs2_invalidate_slot(si, slot_num); |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 350 | spin_unlock(&osb->osb_lock); |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 351 | |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 352 | return ocfs2_update_disk_slot(osb, osb->slot_info, slot_num); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 353 | } |
| 354 | |
Joel Becker | 1c8d9a6 | 2008-02-01 11:59:07 -0800 | [diff] [blame] | 355 | static int ocfs2_map_slot_buffers(struct ocfs2_super *osb, |
| 356 | struct ocfs2_slot_info *si) |
| 357 | { |
| 358 | int status = 0; |
| 359 | u64 blkno; |
| 360 | unsigned long long blocks, bytes; |
| 361 | unsigned int i; |
| 362 | struct buffer_head *bh; |
| 363 | |
| 364 | status = ocfs2_slot_map_physical_size(osb, si->si_inode, &bytes); |
| 365 | if (status) |
| 366 | goto bail; |
| 367 | |
| 368 | blocks = ocfs2_blocks_for_bytes(si->si_inode->i_sb, bytes); |
| 369 | BUG_ON(blocks > UINT_MAX); |
| 370 | si->si_blocks = blocks; |
| 371 | if (!si->si_blocks) |
| 372 | goto bail; |
| 373 | |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 374 | if (si->si_extended) |
| 375 | si->si_slots_per_block = |
| 376 | (osb->sb->s_blocksize / |
| 377 | sizeof(struct ocfs2_extended_slot)); |
| 378 | else |
| 379 | si->si_slots_per_block = osb->sb->s_blocksize / sizeof(__le16); |
| 380 | |
| 381 | /* The size checks above should ensure this */ |
| 382 | BUG_ON((osb->max_slots / si->si_slots_per_block) > blocks); |
| 383 | |
Joel Becker | 1c8d9a6 | 2008-02-01 11:59:07 -0800 | [diff] [blame] | 384 | mlog(0, "Slot map needs %u buffers for %llu bytes\n", |
| 385 | si->si_blocks, bytes); |
| 386 | |
| 387 | si->si_bh = kzalloc(sizeof(struct buffer_head *) * si->si_blocks, |
| 388 | GFP_KERNEL); |
| 389 | if (!si->si_bh) { |
| 390 | status = -ENOMEM; |
| 391 | mlog_errno(status); |
| 392 | goto bail; |
| 393 | } |
| 394 | |
| 395 | for (i = 0; i < si->si_blocks; i++) { |
| 396 | status = ocfs2_extent_map_get_blocks(si->si_inode, i, |
| 397 | &blkno, NULL, NULL); |
| 398 | if (status < 0) { |
| 399 | mlog_errno(status); |
| 400 | goto bail; |
| 401 | } |
| 402 | |
| 403 | mlog(0, "Reading slot map block %u at %llu\n", i, |
| 404 | (unsigned long long)blkno); |
| 405 | |
| 406 | bh = NULL; /* Acquire a fresh bh */ |
Joel Becker | d4a8c93 | 2008-10-09 17:20:34 -0700 | [diff] [blame] | 407 | status = ocfs2_read_blocks(si->si_inode, blkno, 1, &bh, |
Joel Becker | 970e493 | 2008-11-13 14:49:19 -0800 | [diff] [blame^] | 408 | OCFS2_BH_IGNORE_CACHE, NULL); |
Joel Becker | 1c8d9a6 | 2008-02-01 11:59:07 -0800 | [diff] [blame] | 409 | if (status < 0) { |
| 410 | mlog_errno(status); |
| 411 | goto bail; |
| 412 | } |
| 413 | |
| 414 | si->si_bh[i] = bh; |
| 415 | } |
| 416 | |
| 417 | bail: |
| 418 | return status; |
| 419 | } |
| 420 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 421 | int ocfs2_init_slot_info(struct ocfs2_super *osb) |
| 422 | { |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 423 | int status; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 424 | struct inode *inode = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 425 | struct ocfs2_slot_info *si; |
| 426 | |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 427 | si = kzalloc(sizeof(struct ocfs2_slot_info) + |
| 428 | (sizeof(struct ocfs2_slot) * osb->max_slots), |
| 429 | GFP_KERNEL); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 430 | if (!si) { |
| 431 | status = -ENOMEM; |
| 432 | mlog_errno(status); |
| 433 | goto bail; |
| 434 | } |
| 435 | |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 436 | si->si_extended = ocfs2_uses_extended_slot_map(osb); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 437 | si->si_num_slots = osb->max_slots; |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 438 | si->si_slots = (struct ocfs2_slot *)((char *)si + |
| 439 | sizeof(struct ocfs2_slot_info)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 440 | |
| 441 | inode = ocfs2_get_system_file_inode(osb, SLOT_MAP_SYSTEM_INODE, |
| 442 | OCFS2_INVALID_SLOT); |
| 443 | if (!inode) { |
| 444 | status = -EINVAL; |
| 445 | mlog_errno(status); |
| 446 | goto bail; |
| 447 | } |
| 448 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 449 | si->si_inode = inode; |
Joel Becker | 1c8d9a6 | 2008-02-01 11:59:07 -0800 | [diff] [blame] | 450 | status = ocfs2_map_slot_buffers(osb, si); |
| 451 | if (status < 0) { |
| 452 | mlog_errno(status); |
| 453 | goto bail; |
| 454 | } |
| 455 | |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 456 | osb->slot_info = (struct ocfs2_slot_info *)si; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 457 | bail: |
| 458 | if (status < 0 && si) |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 459 | __ocfs2_free_slot_info(si); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 460 | |
| 461 | return status; |
| 462 | } |
| 463 | |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 464 | void ocfs2_free_slot_info(struct ocfs2_super *osb) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 465 | { |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 466 | struct ocfs2_slot_info *si = osb->slot_info; |
| 467 | |
| 468 | osb->slot_info = NULL; |
| 469 | __ocfs2_free_slot_info(si); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 470 | } |
| 471 | |
| 472 | int ocfs2_find_slot(struct ocfs2_super *osb) |
| 473 | { |
| 474 | int status; |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 475 | int slot; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 476 | struct ocfs2_slot_info *si; |
| 477 | |
| 478 | mlog_entry_void(); |
| 479 | |
| 480 | si = osb->slot_info; |
| 481 | |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 482 | spin_lock(&osb->osb_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 483 | ocfs2_update_slot_info(si); |
| 484 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 485 | /* search for ourselves first and take the slot if it already |
| 486 | * exists. Perhaps we need to mark this in a variable for our |
| 487 | * own journal recovery? Possibly not, though we certainly |
| 488 | * need to warn to the user */ |
| 489 | slot = __ocfs2_node_num_to_slot(si, osb->node_num); |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 490 | if (slot < 0) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 491 | /* if no slot yet, then just take 1st available |
| 492 | * one. */ |
Sunil Mushran | baf4661 | 2007-06-18 17:00:24 -0700 | [diff] [blame] | 493 | slot = __ocfs2_find_empty_slot(si, osb->preferred_slot); |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 494 | if (slot < 0) { |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 495 | spin_unlock(&osb->osb_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 496 | mlog(ML_ERROR, "no free slots available!\n"); |
| 497 | status = -EINVAL; |
| 498 | goto bail; |
| 499 | } |
| 500 | } else |
| 501 | mlog(ML_NOTICE, "slot %d is already allocated to this node!\n", |
| 502 | slot); |
| 503 | |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 504 | ocfs2_set_slot(si, slot, osb->node_num); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 505 | osb->slot_num = slot; |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 506 | spin_unlock(&osb->osb_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 507 | |
Mark Fasheh | e7607ab | 2006-04-27 17:53:22 -0700 | [diff] [blame] | 508 | mlog(0, "taking node slot %d\n", osb->slot_num); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 509 | |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 510 | status = ocfs2_update_disk_slot(osb, si, osb->slot_num); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 511 | if (status < 0) |
| 512 | mlog_errno(status); |
| 513 | |
| 514 | bail: |
| 515 | mlog_exit(status); |
| 516 | return status; |
| 517 | } |
| 518 | |
| 519 | void ocfs2_put_slot(struct ocfs2_super *osb) |
| 520 | { |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 521 | int status, slot_num; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 522 | struct ocfs2_slot_info *si = osb->slot_info; |
| 523 | |
| 524 | if (!si) |
| 525 | return; |
| 526 | |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 527 | spin_lock(&osb->osb_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 528 | ocfs2_update_slot_info(si); |
| 529 | |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 530 | slot_num = osb->slot_num; |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 531 | ocfs2_invalidate_slot(si, osb->slot_num); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 532 | osb->slot_num = OCFS2_INVALID_SLOT; |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 533 | spin_unlock(&osb->osb_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 534 | |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 535 | status = ocfs2_update_disk_slot(osb, si, slot_num); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 536 | if (status < 0) { |
| 537 | mlog_errno(status); |
| 538 | goto bail; |
| 539 | } |
| 540 | |
| 541 | bail: |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 542 | ocfs2_free_slot_info(osb); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 543 | } |
| 544 | |