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)); |
| 76 | BUG_ON((node_num == O2NM_INVALID_NODE_NUM) || |
| 77 | (node_num >= O2NM_MAX_NODES)); |
| 78 | |
| 79 | si->si_slots[slot_num].sl_valid = 1; |
| 80 | si->si_slots[slot_num].sl_node_num = node_num; |
| 81 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 82 | |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 83 | /* This version is for the extended slot map */ |
| 84 | static void ocfs2_update_slot_info_extended(struct ocfs2_slot_info *si) |
| 85 | { |
| 86 | int b, i, slotno; |
| 87 | struct ocfs2_slot_map_extended *se; |
| 88 | |
| 89 | slotno = 0; |
| 90 | for (b = 0; b < si->si_blocks; b++) { |
| 91 | se = (struct ocfs2_slot_map_extended *)si->si_bh[b]->b_data; |
| 92 | for (i = 0; |
| 93 | (i < si->si_slots_per_block) && |
| 94 | (slotno < si->si_num_slots); |
| 95 | i++, slotno++) { |
| 96 | if (se->se_slots[i].es_valid) |
| 97 | ocfs2_set_slot(si, slotno, |
| 98 | le32_to_cpu(se->se_slots[i].es_node_num)); |
| 99 | else |
| 100 | ocfs2_invalidate_slot(si, slotno); |
| 101 | } |
| 102 | } |
| 103 | } |
| 104 | |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 105 | /* |
| 106 | * Post the slot information on disk into our slot_info struct. |
| 107 | * Must be protected by osb_lock. |
| 108 | */ |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 109 | static void ocfs2_update_slot_info_old(struct ocfs2_slot_info *si) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 110 | { |
| 111 | int i; |
Joel Becker | fb86b1f | 2008-02-01 11:59:05 -0800 | [diff] [blame] | 112 | struct ocfs2_slot_map *sm; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 113 | |
Joel Becker | fb86b1f | 2008-02-01 11:59:05 -0800 | [diff] [blame] | 114 | sm = (struct ocfs2_slot_map *)si->si_bh[0]->b_data; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 115 | |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 116 | for (i = 0; i < si->si_num_slots; i++) { |
Joel Becker | fb86b1f | 2008-02-01 11:59:05 -0800 | [diff] [blame] | 117 | if (le16_to_cpu(sm->sm_slots[i]) == (u16)OCFS2_INVALID_SLOT) |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 118 | ocfs2_invalidate_slot(si, i); |
| 119 | else |
Joel Becker | fb86b1f | 2008-02-01 11:59:05 -0800 | [diff] [blame] | 120 | ocfs2_set_slot(si, i, le16_to_cpu(sm->sm_slots[i])); |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 121 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 122 | } |
| 123 | |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 124 | static void ocfs2_update_slot_info(struct ocfs2_slot_info *si) |
| 125 | { |
| 126 | /* |
| 127 | * The slot data will have been refreshed when ocfs2_super_lock |
| 128 | * was taken. |
| 129 | */ |
| 130 | if (si->si_extended) |
| 131 | ocfs2_update_slot_info_extended(si); |
| 132 | else |
| 133 | ocfs2_update_slot_info_old(si); |
| 134 | } |
| 135 | |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 136 | int ocfs2_refresh_slot_info(struct ocfs2_super *osb) |
| 137 | { |
| 138 | int ret; |
| 139 | struct ocfs2_slot_info *si = osb->slot_info; |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 140 | |
| 141 | if (si == NULL) |
| 142 | return 0; |
| 143 | |
Joel Becker | 1c8d9a6 | 2008-02-01 11:59:07 -0800 | [diff] [blame] | 144 | BUG_ON(si->si_blocks == 0); |
| 145 | BUG_ON(si->si_bh == NULL); |
| 146 | |
| 147 | mlog(0, "Refreshing slot map, reading %u block(s)\n", |
| 148 | si->si_blocks); |
| 149 | |
| 150 | /* |
| 151 | * We pass -1 as blocknr because we expect all of si->si_bh to |
| 152 | * be !NULL. Thus, ocfs2_read_blocks() will ignore blocknr. If |
| 153 | * this is not true, the read of -1 (UINT64_MAX) will fail. |
| 154 | */ |
| 155 | ret = ocfs2_read_blocks(osb, -1, si->si_blocks, si->si_bh, 0, |
| 156 | si->si_inode); |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 157 | if (ret == 0) { |
| 158 | spin_lock(&osb->osb_lock); |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 159 | ocfs2_update_slot_info(si); |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 160 | spin_unlock(&osb->osb_lock); |
| 161 | } |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 162 | |
| 163 | return ret; |
| 164 | } |
| 165 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 166 | /* post the our slot info stuff into it's destination bh and write it |
| 167 | * out. */ |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 168 | static void ocfs2_update_disk_slot_extended(struct ocfs2_slot_info *si, |
| 169 | int slot_num, |
| 170 | struct buffer_head **bh) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 171 | { |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 172 | int blkind = slot_num / si->si_slots_per_block; |
| 173 | int slotno = slot_num % si->si_slots_per_block; |
| 174 | struct ocfs2_slot_map_extended *se; |
| 175 | |
| 176 | BUG_ON(blkind >= si->si_blocks); |
| 177 | |
| 178 | se = (struct ocfs2_slot_map_extended *)si->si_bh[blkind]->b_data; |
| 179 | se->se_slots[slotno].es_valid = si->si_slots[slot_num].sl_valid; |
| 180 | if (si->si_slots[slot_num].sl_valid) |
| 181 | se->se_slots[slotno].es_node_num = |
| 182 | cpu_to_le32(si->si_slots[slot_num].sl_node_num); |
| 183 | *bh = si->si_bh[blkind]; |
| 184 | } |
| 185 | |
| 186 | static void ocfs2_update_disk_slot_old(struct ocfs2_slot_info *si, |
| 187 | int slot_num, |
| 188 | struct buffer_head **bh) |
| 189 | { |
| 190 | int i; |
Joel Becker | fb86b1f | 2008-02-01 11:59:05 -0800 | [diff] [blame] | 191 | struct ocfs2_slot_map *sm; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 192 | |
Joel Becker | fb86b1f | 2008-02-01 11:59:05 -0800 | [diff] [blame] | 193 | sm = (struct ocfs2_slot_map *)si->si_bh[0]->b_data; |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 194 | for (i = 0; i < si->si_num_slots; i++) { |
| 195 | if (si->si_slots[i].sl_valid) |
Joel Becker | fb86b1f | 2008-02-01 11:59:05 -0800 | [diff] [blame] | 196 | sm->sm_slots[i] = |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 197 | cpu_to_le16(si->si_slots[i].sl_node_num); |
| 198 | else |
Joel Becker | fb86b1f | 2008-02-01 11:59:05 -0800 | [diff] [blame] | 199 | sm->sm_slots[i] = cpu_to_le16(OCFS2_INVALID_SLOT); |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 200 | } |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 201 | *bh = si->si_bh[0]; |
| 202 | } |
| 203 | |
| 204 | static int ocfs2_update_disk_slot(struct ocfs2_super *osb, |
| 205 | struct ocfs2_slot_info *si, |
| 206 | int slot_num) |
| 207 | { |
| 208 | int status; |
| 209 | struct buffer_head *bh; |
| 210 | |
| 211 | spin_lock(&osb->osb_lock); |
| 212 | if (si->si_extended) |
| 213 | ocfs2_update_disk_slot_extended(si, slot_num, &bh); |
| 214 | else |
| 215 | ocfs2_update_disk_slot_old(si, slot_num, &bh); |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 216 | spin_unlock(&osb->osb_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 217 | |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 218 | status = ocfs2_write_block(osb, bh, si->si_inode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 219 | if (status < 0) |
| 220 | mlog_errno(status); |
| 221 | |
| 222 | return status; |
| 223 | } |
| 224 | |
Joel Becker | 1c8d9a6 | 2008-02-01 11:59:07 -0800 | [diff] [blame] | 225 | /* |
| 226 | * Calculate how many bytes are needed by the slot map. Returns |
| 227 | * an error if the slot map file is too small. |
| 228 | */ |
| 229 | static int ocfs2_slot_map_physical_size(struct ocfs2_super *osb, |
| 230 | struct inode *inode, |
| 231 | unsigned long long *bytes) |
| 232 | { |
| 233 | unsigned long long bytes_needed; |
| 234 | |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 235 | if (ocfs2_uses_extended_slot_map(osb)) { |
| 236 | bytes_needed = osb->max_slots * |
| 237 | sizeof(struct ocfs2_extended_slot); |
| 238 | } else { |
| 239 | bytes_needed = osb->max_slots * sizeof(__le16); |
| 240 | } |
Joel Becker | 1c8d9a6 | 2008-02-01 11:59:07 -0800 | [diff] [blame] | 241 | if (bytes_needed > i_size_read(inode)) { |
| 242 | mlog(ML_ERROR, |
| 243 | "Slot map file is too small! (size %llu, needed %llu)\n", |
| 244 | i_size_read(inode), bytes_needed); |
| 245 | return -ENOSPC; |
| 246 | } |
| 247 | |
| 248 | *bytes = bytes_needed; |
| 249 | return 0; |
| 250 | } |
| 251 | |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 252 | /* try to find global node in the slot info. Returns -ENOENT |
| 253 | * if nothing is found. */ |
| 254 | static int __ocfs2_node_num_to_slot(struct ocfs2_slot_info *si, |
| 255 | unsigned int node_num) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 256 | { |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 257 | int i, ret = -ENOENT; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 258 | |
| 259 | for(i = 0; i < si->si_num_slots; i++) { |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 260 | if (si->si_slots[i].sl_valid && |
| 261 | (node_num == si->si_slots[i].sl_node_num)) { |
| 262 | ret = i; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 263 | break; |
| 264 | } |
| 265 | } |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 266 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 267 | return ret; |
| 268 | } |
| 269 | |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 270 | static int __ocfs2_find_empty_slot(struct ocfs2_slot_info *si, |
| 271 | int preferred) |
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 | int i, ret = -ENOSPC; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 274 | |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 275 | if ((preferred >= 0) && (preferred < si->si_num_slots)) { |
| 276 | if (!si->si_slots[preferred].sl_valid) { |
Sunil Mushran | baf4661 | 2007-06-18 17:00:24 -0700 | [diff] [blame] | 277 | ret = preferred; |
| 278 | goto out; |
| 279 | } |
| 280 | } |
| 281 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 282 | for(i = 0; i < si->si_num_slots; i++) { |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 283 | if (!si->si_slots[i].sl_valid) { |
| 284 | ret = i; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 285 | break; |
| 286 | } |
| 287 | } |
Sunil Mushran | baf4661 | 2007-06-18 17:00:24 -0700 | [diff] [blame] | 288 | out: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 289 | return ret; |
| 290 | } |
| 291 | |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 292 | 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] | 293 | { |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 294 | int slot; |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 295 | struct ocfs2_slot_info *si = osb->slot_info; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 296 | |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 297 | spin_lock(&osb->osb_lock); |
| 298 | slot = __ocfs2_node_num_to_slot(si, node_num); |
| 299 | spin_unlock(&osb->osb_lock); |
| 300 | |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 301 | return slot; |
| 302 | } |
| 303 | |
| 304 | int ocfs2_slot_to_node_num_locked(struct ocfs2_super *osb, int slot_num, |
| 305 | unsigned int *node_num) |
| 306 | { |
| 307 | struct ocfs2_slot_info *si = osb->slot_info; |
| 308 | |
| 309 | assert_spin_locked(&osb->osb_lock); |
| 310 | |
| 311 | BUG_ON(slot_num < 0); |
| 312 | BUG_ON(slot_num > osb->max_slots); |
| 313 | |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 314 | if (!si->si_slots[slot_num].sl_valid) |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 315 | return -ENOENT; |
| 316 | |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 317 | *node_num = si->si_slots[slot_num].sl_node_num; |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 318 | return 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 319 | } |
| 320 | |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 321 | static void __ocfs2_free_slot_info(struct ocfs2_slot_info *si) |
| 322 | { |
Joel Becker | 1c8d9a6 | 2008-02-01 11:59:07 -0800 | [diff] [blame] | 323 | unsigned int i; |
| 324 | |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 325 | if (si == NULL) |
| 326 | return; |
| 327 | |
| 328 | if (si->si_inode) |
| 329 | iput(si->si_inode); |
Joel Becker | 1c8d9a6 | 2008-02-01 11:59:07 -0800 | [diff] [blame] | 330 | if (si->si_bh) { |
| 331 | for (i = 0; i < si->si_blocks; i++) { |
| 332 | if (si->si_bh[i]) { |
| 333 | brelse(si->si_bh[i]); |
| 334 | si->si_bh[i] = NULL; |
| 335 | } |
| 336 | } |
| 337 | kfree(si->si_bh); |
| 338 | } |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 339 | |
| 340 | kfree(si); |
| 341 | } |
| 342 | |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 343 | int ocfs2_clear_slot(struct ocfs2_super *osb, int slot_num) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 344 | { |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 345 | struct ocfs2_slot_info *si = osb->slot_info; |
| 346 | |
| 347 | if (si == NULL) |
| 348 | return 0; |
| 349 | |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 350 | spin_lock(&osb->osb_lock); |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 351 | ocfs2_invalidate_slot(si, slot_num); |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 352 | spin_unlock(&osb->osb_lock); |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 353 | |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 354 | return ocfs2_update_disk_slot(osb, osb->slot_info, slot_num); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 355 | } |
| 356 | |
Joel Becker | 1c8d9a6 | 2008-02-01 11:59:07 -0800 | [diff] [blame] | 357 | static int ocfs2_map_slot_buffers(struct ocfs2_super *osb, |
| 358 | struct ocfs2_slot_info *si) |
| 359 | { |
| 360 | int status = 0; |
| 361 | u64 blkno; |
| 362 | unsigned long long blocks, bytes; |
| 363 | unsigned int i; |
| 364 | struct buffer_head *bh; |
| 365 | |
| 366 | status = ocfs2_slot_map_physical_size(osb, si->si_inode, &bytes); |
| 367 | if (status) |
| 368 | goto bail; |
| 369 | |
| 370 | blocks = ocfs2_blocks_for_bytes(si->si_inode->i_sb, bytes); |
| 371 | BUG_ON(blocks > UINT_MAX); |
| 372 | si->si_blocks = blocks; |
| 373 | if (!si->si_blocks) |
| 374 | goto bail; |
| 375 | |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 376 | if (si->si_extended) |
| 377 | si->si_slots_per_block = |
| 378 | (osb->sb->s_blocksize / |
| 379 | sizeof(struct ocfs2_extended_slot)); |
| 380 | else |
| 381 | si->si_slots_per_block = osb->sb->s_blocksize / sizeof(__le16); |
| 382 | |
| 383 | /* The size checks above should ensure this */ |
| 384 | BUG_ON((osb->max_slots / si->si_slots_per_block) > blocks); |
| 385 | |
Joel Becker | 1c8d9a6 | 2008-02-01 11:59:07 -0800 | [diff] [blame] | 386 | mlog(0, "Slot map needs %u buffers for %llu bytes\n", |
| 387 | si->si_blocks, bytes); |
| 388 | |
| 389 | si->si_bh = kzalloc(sizeof(struct buffer_head *) * si->si_blocks, |
| 390 | GFP_KERNEL); |
| 391 | if (!si->si_bh) { |
| 392 | status = -ENOMEM; |
| 393 | mlog_errno(status); |
| 394 | goto bail; |
| 395 | } |
| 396 | |
| 397 | for (i = 0; i < si->si_blocks; i++) { |
| 398 | status = ocfs2_extent_map_get_blocks(si->si_inode, i, |
| 399 | &blkno, NULL, NULL); |
| 400 | if (status < 0) { |
| 401 | mlog_errno(status); |
| 402 | goto bail; |
| 403 | } |
| 404 | |
| 405 | mlog(0, "Reading slot map block %u at %llu\n", i, |
| 406 | (unsigned long long)blkno); |
| 407 | |
| 408 | bh = NULL; /* Acquire a fresh bh */ |
| 409 | status = ocfs2_read_block(osb, blkno, &bh, 0, si->si_inode); |
| 410 | if (status < 0) { |
| 411 | mlog_errno(status); |
| 412 | goto bail; |
| 413 | } |
| 414 | |
| 415 | si->si_bh[i] = bh; |
| 416 | } |
| 417 | |
| 418 | bail: |
| 419 | return status; |
| 420 | } |
| 421 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 422 | int ocfs2_init_slot_info(struct ocfs2_super *osb) |
| 423 | { |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 424 | int status; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 425 | struct inode *inode = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 426 | struct ocfs2_slot_info *si; |
| 427 | |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 428 | si = kzalloc(sizeof(struct ocfs2_slot_info) + |
| 429 | (sizeof(struct ocfs2_slot) * osb->max_slots), |
| 430 | GFP_KERNEL); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 431 | if (!si) { |
| 432 | status = -ENOMEM; |
| 433 | mlog_errno(status); |
| 434 | goto bail; |
| 435 | } |
| 436 | |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 437 | si->si_extended = ocfs2_uses_extended_slot_map(osb); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 438 | si->si_num_slots = osb->max_slots; |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 439 | si->si_slots = (struct ocfs2_slot *)((char *)si + |
| 440 | sizeof(struct ocfs2_slot_info)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 441 | |
| 442 | inode = ocfs2_get_system_file_inode(osb, SLOT_MAP_SYSTEM_INODE, |
| 443 | OCFS2_INVALID_SLOT); |
| 444 | if (!inode) { |
| 445 | status = -EINVAL; |
| 446 | mlog_errno(status); |
| 447 | goto bail; |
| 448 | } |
| 449 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 450 | si->si_inode = inode; |
Joel Becker | 1c8d9a6 | 2008-02-01 11:59:07 -0800 | [diff] [blame] | 451 | status = ocfs2_map_slot_buffers(osb, si); |
| 452 | if (status < 0) { |
| 453 | mlog_errno(status); |
| 454 | goto bail; |
| 455 | } |
| 456 | |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 457 | osb->slot_info = (struct ocfs2_slot_info *)si; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 458 | bail: |
| 459 | if (status < 0 && si) |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 460 | __ocfs2_free_slot_info(si); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 461 | |
| 462 | return status; |
| 463 | } |
| 464 | |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 465 | void ocfs2_free_slot_info(struct ocfs2_super *osb) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 466 | { |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 467 | struct ocfs2_slot_info *si = osb->slot_info; |
| 468 | |
| 469 | osb->slot_info = NULL; |
| 470 | __ocfs2_free_slot_info(si); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 471 | } |
| 472 | |
| 473 | int ocfs2_find_slot(struct ocfs2_super *osb) |
| 474 | { |
| 475 | int status; |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 476 | int slot; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 477 | struct ocfs2_slot_info *si; |
| 478 | |
| 479 | mlog_entry_void(); |
| 480 | |
| 481 | si = osb->slot_info; |
| 482 | |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 483 | spin_lock(&osb->osb_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 484 | ocfs2_update_slot_info(si); |
| 485 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 486 | /* search for ourselves first and take the slot if it already |
| 487 | * exists. Perhaps we need to mark this in a variable for our |
| 488 | * own journal recovery? Possibly not, though we certainly |
| 489 | * need to warn to the user */ |
| 490 | slot = __ocfs2_node_num_to_slot(si, osb->node_num); |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 491 | if (slot < 0) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 492 | /* if no slot yet, then just take 1st available |
| 493 | * one. */ |
Sunil Mushran | baf4661 | 2007-06-18 17:00:24 -0700 | [diff] [blame] | 494 | slot = __ocfs2_find_empty_slot(si, osb->preferred_slot); |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 495 | if (slot < 0) { |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 496 | spin_unlock(&osb->osb_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 497 | mlog(ML_ERROR, "no free slots available!\n"); |
| 498 | status = -EINVAL; |
| 499 | goto bail; |
| 500 | } |
| 501 | } else |
| 502 | mlog(ML_NOTICE, "slot %d is already allocated to this node!\n", |
| 503 | slot); |
| 504 | |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 505 | ocfs2_set_slot(si, slot, osb->node_num); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 506 | osb->slot_num = slot; |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 507 | spin_unlock(&osb->osb_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 508 | |
Mark Fasheh | e7607ab | 2006-04-27 17:53:22 -0700 | [diff] [blame] | 509 | mlog(0, "taking node slot %d\n", osb->slot_num); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 510 | |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 511 | status = ocfs2_update_disk_slot(osb, si, osb->slot_num); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 512 | if (status < 0) |
| 513 | mlog_errno(status); |
| 514 | |
| 515 | bail: |
| 516 | mlog_exit(status); |
| 517 | return status; |
| 518 | } |
| 519 | |
| 520 | void ocfs2_put_slot(struct ocfs2_super *osb) |
| 521 | { |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 522 | int status, slot_num; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 523 | struct ocfs2_slot_info *si = osb->slot_info; |
| 524 | |
| 525 | if (!si) |
| 526 | return; |
| 527 | |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 528 | spin_lock(&osb->osb_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 529 | ocfs2_update_slot_info(si); |
| 530 | |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 531 | slot_num = osb->slot_num; |
Joel Becker | fc881fa | 2008-02-01 12:04:48 -0800 | [diff] [blame] | 532 | ocfs2_invalidate_slot(si, osb->slot_num); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 533 | osb->slot_num = OCFS2_INVALID_SLOT; |
Joel Becker | d85b20e | 2008-02-01 12:01:05 -0800 | [diff] [blame] | 534 | spin_unlock(&osb->osb_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 535 | |
Joel Becker | 386a2ef | 2008-02-01 12:06:54 -0800 | [diff] [blame] | 536 | status = ocfs2_update_disk_slot(osb, si, slot_num); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 537 | if (status < 0) { |
| 538 | mlog_errno(status); |
| 539 | goto bail; |
| 540 | } |
| 541 | |
| 542 | bail: |
Mark Fasheh | 8e8a460 | 2008-02-01 11:59:09 -0800 | [diff] [blame] | 543 | ocfs2_free_slot_info(osb); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 544 | } |
| 545 | |