David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
Steven Whitehouse | 3a8a9a1 | 2006-05-18 15:09:15 -0400 | [diff] [blame] | 3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 4 | * |
| 5 | * This copyrighted material is made available to anyone wishing to use, |
| 6 | * modify, copy, or redistribute it subject to the terms and conditions |
| 7 | * of the GNU General Public License v.2. |
| 8 | */ |
| 9 | |
| 10 | /* |
| 11 | * Quota change tags are associated with each transaction that allocates or |
| 12 | * deallocates space. Those changes are accumulated locally to each node (in a |
| 13 | * per-node file) and then are periodically synced to the quota file. This |
| 14 | * avoids the bottleneck of constantly touching the quota file, but introduces |
| 15 | * fuzziness in the current usage value of IDs that are being used on different |
| 16 | * nodes in the cluster simultaneously. So, it is possible for a user on |
| 17 | * multiple nodes to overrun their quota, but that overrun is controlable. |
| 18 | * Since quota tags are part of transactions, there is no need to a quota check |
| 19 | * program to be run on node crashes or anything like that. |
| 20 | * |
| 21 | * There are couple of knobs that let the administrator manage the quota |
| 22 | * fuzziness. "quota_quantum" sets the maximum time a quota change can be |
| 23 | * sitting on one node before being synced to the quota file. (The default is |
| 24 | * 60 seconds.) Another knob, "quota_scale" controls how quickly the frequency |
| 25 | * of quota file syncs increases as the user moves closer to their limit. The |
| 26 | * more frequent the syncs, the more accurate the quota enforcement, but that |
| 27 | * means that there is more contention between the nodes for the quota file. |
| 28 | * The default value is one. This sets the maximum theoretical quota overrun |
| 29 | * (with infinite node with infinite bandwidth) to twice the user's limit. (In |
| 30 | * practice, the maximum overrun you see should be much less.) A "quota_scale" |
| 31 | * number greater than one makes quota syncs more frequent and reduces the |
| 32 | * maximum overrun. Numbers less than one (but greater than zero) make quota |
| 33 | * syncs less frequent. |
| 34 | * |
| 35 | * GFS quotas also use per-ID Lock Value Blocks (LVBs) to cache the contents of |
| 36 | * the quota file, so it is not being constantly read. |
| 37 | */ |
| 38 | |
| 39 | #include <linux/sched.h> |
| 40 | #include <linux/slab.h> |
| 41 | #include <linux/spinlock.h> |
| 42 | #include <linux/completion.h> |
| 43 | #include <linux/buffer_head.h> |
| 44 | #include <linux/tty.h> |
| 45 | #include <linux/sort.h> |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 46 | #include <linux/fs.h> |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 47 | #include <linux/gfs2_ondisk.h> |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 48 | |
| 49 | #include "gfs2.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 50 | #include "lm_interface.h" |
| 51 | #include "incore.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 52 | #include "bmap.h" |
| 53 | #include "glock.h" |
| 54 | #include "glops.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 55 | #include "log.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 56 | #include "lvb.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 57 | #include "meta_io.h" |
| 58 | #include "quota.h" |
| 59 | #include "rgrp.h" |
| 60 | #include "super.h" |
| 61 | #include "trans.h" |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 62 | #include "inode.h" |
Steven Whitehouse | f42faf4 | 2006-01-30 18:34:10 +0000 | [diff] [blame] | 63 | #include "ops_file.h" |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 64 | #include "ops_address.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 65 | #include "util.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 66 | |
| 67 | #define QUOTA_USER 1 |
| 68 | #define QUOTA_GROUP 0 |
| 69 | |
| 70 | static uint64_t qd2offset(struct gfs2_quota_data *qd) |
| 71 | { |
| 72 | uint64_t offset; |
| 73 | |
| 74 | offset = 2 * (uint64_t)qd->qd_id + !test_bit(QDF_USER, &qd->qd_flags); |
| 75 | offset *= sizeof(struct gfs2_quota); |
| 76 | |
| 77 | return offset; |
| 78 | } |
| 79 | |
| 80 | static int qd_alloc(struct gfs2_sbd *sdp, int user, uint32_t id, |
| 81 | struct gfs2_quota_data **qdp) |
| 82 | { |
| 83 | struct gfs2_quota_data *qd; |
| 84 | int error; |
| 85 | |
| 86 | qd = kzalloc(sizeof(struct gfs2_quota_data), GFP_KERNEL); |
| 87 | if (!qd) |
| 88 | return -ENOMEM; |
| 89 | |
| 90 | qd->qd_count = 1; |
| 91 | qd->qd_id = id; |
| 92 | if (user) |
| 93 | set_bit(QDF_USER, &qd->qd_flags); |
| 94 | qd->qd_slot = -1; |
| 95 | |
| 96 | error = gfs2_glock_get(sdp, 2 * (uint64_t)id + !user, |
| 97 | &gfs2_quota_glops, CREATE, &qd->qd_gl); |
| 98 | if (error) |
| 99 | goto fail; |
| 100 | |
| 101 | error = gfs2_lvb_hold(qd->qd_gl); |
| 102 | gfs2_glock_put(qd->qd_gl); |
| 103 | if (error) |
| 104 | goto fail; |
| 105 | |
| 106 | *qdp = qd; |
| 107 | |
| 108 | return 0; |
| 109 | |
| 110 | fail: |
| 111 | kfree(qd); |
| 112 | return error; |
| 113 | } |
| 114 | |
| 115 | static int qd_get(struct gfs2_sbd *sdp, int user, uint32_t id, int create, |
| 116 | struct gfs2_quota_data **qdp) |
| 117 | { |
| 118 | struct gfs2_quota_data *qd = NULL, *new_qd = NULL; |
| 119 | int error, found; |
| 120 | |
| 121 | *qdp = NULL; |
| 122 | |
| 123 | for (;;) { |
| 124 | found = 0; |
| 125 | spin_lock(&sdp->sd_quota_spin); |
| 126 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { |
| 127 | if (qd->qd_id == id && |
| 128 | !test_bit(QDF_USER, &qd->qd_flags) == !user) { |
| 129 | qd->qd_count++; |
| 130 | found = 1; |
| 131 | break; |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | if (!found) |
| 136 | qd = NULL; |
| 137 | |
| 138 | if (!qd && new_qd) { |
| 139 | qd = new_qd; |
| 140 | list_add(&qd->qd_list, &sdp->sd_quota_list); |
| 141 | atomic_inc(&sdp->sd_quota_count); |
| 142 | new_qd = NULL; |
| 143 | } |
| 144 | |
| 145 | spin_unlock(&sdp->sd_quota_spin); |
| 146 | |
| 147 | if (qd || !create) { |
| 148 | if (new_qd) { |
| 149 | gfs2_lvb_unhold(new_qd->qd_gl); |
| 150 | kfree(new_qd); |
| 151 | } |
| 152 | *qdp = qd; |
| 153 | return 0; |
| 154 | } |
| 155 | |
| 156 | error = qd_alloc(sdp, user, id, &new_qd); |
| 157 | if (error) |
| 158 | return error; |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | static void qd_hold(struct gfs2_quota_data *qd) |
| 163 | { |
| 164 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
| 165 | |
| 166 | spin_lock(&sdp->sd_quota_spin); |
| 167 | gfs2_assert(sdp, qd->qd_count); |
| 168 | qd->qd_count++; |
| 169 | spin_unlock(&sdp->sd_quota_spin); |
| 170 | } |
| 171 | |
| 172 | static void qd_put(struct gfs2_quota_data *qd) |
| 173 | { |
| 174 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
| 175 | spin_lock(&sdp->sd_quota_spin); |
| 176 | gfs2_assert(sdp, qd->qd_count); |
| 177 | if (!--qd->qd_count) |
| 178 | qd->qd_last_touched = jiffies; |
| 179 | spin_unlock(&sdp->sd_quota_spin); |
| 180 | } |
| 181 | |
| 182 | static int slot_get(struct gfs2_quota_data *qd) |
| 183 | { |
| 184 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
| 185 | unsigned int c, o = 0, b; |
| 186 | unsigned char byte = 0; |
| 187 | |
| 188 | spin_lock(&sdp->sd_quota_spin); |
| 189 | |
| 190 | if (qd->qd_slot_count++) { |
| 191 | spin_unlock(&sdp->sd_quota_spin); |
| 192 | return 0; |
| 193 | } |
| 194 | |
| 195 | for (c = 0; c < sdp->sd_quota_chunks; c++) |
| 196 | for (o = 0; o < PAGE_SIZE; o++) { |
| 197 | byte = sdp->sd_quota_bitmap[c][o]; |
| 198 | if (byte != 0xFF) |
| 199 | goto found; |
| 200 | } |
| 201 | |
| 202 | goto fail; |
| 203 | |
| 204 | found: |
| 205 | for (b = 0; b < 8; b++) |
| 206 | if (!(byte & (1 << b))) |
| 207 | break; |
| 208 | qd->qd_slot = c * (8 * PAGE_SIZE) + o * 8 + b; |
| 209 | |
| 210 | if (qd->qd_slot >= sdp->sd_quota_slots) |
| 211 | goto fail; |
| 212 | |
| 213 | sdp->sd_quota_bitmap[c][o] |= 1 << b; |
| 214 | |
| 215 | spin_unlock(&sdp->sd_quota_spin); |
| 216 | |
| 217 | return 0; |
| 218 | |
| 219 | fail: |
| 220 | qd->qd_slot_count--; |
| 221 | spin_unlock(&sdp->sd_quota_spin); |
| 222 | return -ENOSPC; |
| 223 | } |
| 224 | |
| 225 | static void slot_hold(struct gfs2_quota_data *qd) |
| 226 | { |
| 227 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
| 228 | |
| 229 | spin_lock(&sdp->sd_quota_spin); |
| 230 | gfs2_assert(sdp, qd->qd_slot_count); |
| 231 | qd->qd_slot_count++; |
| 232 | spin_unlock(&sdp->sd_quota_spin); |
| 233 | } |
| 234 | |
| 235 | static void slot_put(struct gfs2_quota_data *qd) |
| 236 | { |
| 237 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
| 238 | |
| 239 | spin_lock(&sdp->sd_quota_spin); |
| 240 | gfs2_assert(sdp, qd->qd_slot_count); |
| 241 | if (!--qd->qd_slot_count) { |
| 242 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, qd->qd_slot, 0); |
| 243 | qd->qd_slot = -1; |
| 244 | } |
| 245 | spin_unlock(&sdp->sd_quota_spin); |
| 246 | } |
| 247 | |
| 248 | static int bh_get(struct gfs2_quota_data *qd) |
| 249 | { |
| 250 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 251 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 252 | unsigned int block, offset; |
| 253 | uint64_t dblock; |
| 254 | int new = 0; |
| 255 | struct buffer_head *bh; |
| 256 | int error; |
Steven Whitehouse | fd88de56 | 2006-05-05 16:59:11 -0400 | [diff] [blame] | 257 | int boundary; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 258 | |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 259 | mutex_lock(&sdp->sd_quota_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 260 | |
| 261 | if (qd->qd_bh_count++) { |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 262 | mutex_unlock(&sdp->sd_quota_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 263 | return 0; |
| 264 | } |
| 265 | |
| 266 | block = qd->qd_slot / sdp->sd_qc_per_block; |
| 267 | offset = qd->qd_slot % sdp->sd_qc_per_block;; |
| 268 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 269 | error = gfs2_block_map(&ip->i_inode, block, &new, &dblock, &boundary); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 270 | if (error) |
| 271 | goto fail; |
| 272 | error = gfs2_meta_read(ip->i_gl, dblock, DIO_START | DIO_WAIT, &bh); |
| 273 | if (error) |
| 274 | goto fail; |
| 275 | error = -EIO; |
| 276 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) |
| 277 | goto fail_brelse; |
| 278 | |
| 279 | qd->qd_bh = bh; |
| 280 | qd->qd_bh_qc = (struct gfs2_quota_change *) |
| 281 | (bh->b_data + sizeof(struct gfs2_meta_header) + |
| 282 | offset * sizeof(struct gfs2_quota_change)); |
| 283 | |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 284 | mutex_lock(&sdp->sd_quota_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 285 | |
| 286 | return 0; |
| 287 | |
| 288 | fail_brelse: |
| 289 | brelse(bh); |
| 290 | |
| 291 | fail: |
| 292 | qd->qd_bh_count--; |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 293 | mutex_unlock(&sdp->sd_quota_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 294 | return error; |
| 295 | } |
| 296 | |
| 297 | static void bh_put(struct gfs2_quota_data *qd) |
| 298 | { |
| 299 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
| 300 | |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 301 | mutex_lock(&sdp->sd_quota_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 302 | gfs2_assert(sdp, qd->qd_bh_count); |
| 303 | if (!--qd->qd_bh_count) { |
| 304 | brelse(qd->qd_bh); |
| 305 | qd->qd_bh = NULL; |
| 306 | qd->qd_bh_qc = NULL; |
| 307 | } |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 308 | mutex_unlock(&sdp->sd_quota_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 309 | } |
| 310 | |
| 311 | static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) |
| 312 | { |
| 313 | struct gfs2_quota_data *qd = NULL; |
| 314 | int error; |
| 315 | int found = 0; |
| 316 | |
| 317 | *qdp = NULL; |
| 318 | |
| 319 | if (sdp->sd_vfs->s_flags & MS_RDONLY) |
| 320 | return 0; |
| 321 | |
| 322 | spin_lock(&sdp->sd_quota_spin); |
| 323 | |
| 324 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { |
| 325 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || |
| 326 | !test_bit(QDF_CHANGE, &qd->qd_flags) || |
| 327 | qd->qd_sync_gen >= sdp->sd_quota_sync_gen) |
| 328 | continue; |
| 329 | |
| 330 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); |
| 331 | |
| 332 | set_bit(QDF_LOCKED, &qd->qd_flags); |
| 333 | gfs2_assert_warn(sdp, qd->qd_count); |
| 334 | qd->qd_count++; |
| 335 | qd->qd_change_sync = qd->qd_change; |
| 336 | gfs2_assert_warn(sdp, qd->qd_slot_count); |
| 337 | qd->qd_slot_count++; |
| 338 | found = 1; |
| 339 | |
| 340 | break; |
| 341 | } |
| 342 | |
| 343 | if (!found) |
| 344 | qd = NULL; |
| 345 | |
| 346 | spin_unlock(&sdp->sd_quota_spin); |
| 347 | |
| 348 | if (qd) { |
| 349 | gfs2_assert_warn(sdp, qd->qd_change_sync); |
| 350 | error = bh_get(qd); |
| 351 | if (error) { |
| 352 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
| 353 | slot_put(qd); |
| 354 | qd_put(qd); |
| 355 | return error; |
| 356 | } |
| 357 | } |
| 358 | |
| 359 | *qdp = qd; |
| 360 | |
| 361 | return 0; |
| 362 | } |
| 363 | |
| 364 | static int qd_trylock(struct gfs2_quota_data *qd) |
| 365 | { |
| 366 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
| 367 | |
| 368 | if (sdp->sd_vfs->s_flags & MS_RDONLY) |
| 369 | return 0; |
| 370 | |
| 371 | spin_lock(&sdp->sd_quota_spin); |
| 372 | |
| 373 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || |
| 374 | !test_bit(QDF_CHANGE, &qd->qd_flags)) { |
| 375 | spin_unlock(&sdp->sd_quota_spin); |
| 376 | return 0; |
| 377 | } |
| 378 | |
| 379 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); |
| 380 | |
| 381 | set_bit(QDF_LOCKED, &qd->qd_flags); |
| 382 | gfs2_assert_warn(sdp, qd->qd_count); |
| 383 | qd->qd_count++; |
| 384 | qd->qd_change_sync = qd->qd_change; |
| 385 | gfs2_assert_warn(sdp, qd->qd_slot_count); |
| 386 | qd->qd_slot_count++; |
| 387 | |
| 388 | spin_unlock(&sdp->sd_quota_spin); |
| 389 | |
| 390 | gfs2_assert_warn(sdp, qd->qd_change_sync); |
| 391 | if (bh_get(qd)) { |
| 392 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
| 393 | slot_put(qd); |
| 394 | qd_put(qd); |
| 395 | return 0; |
| 396 | } |
| 397 | |
| 398 | return 1; |
| 399 | } |
| 400 | |
| 401 | static void qd_unlock(struct gfs2_quota_data *qd) |
| 402 | { |
Steven Whitehouse | 568f4c9 | 2006-02-27 12:00:42 -0500 | [diff] [blame] | 403 | gfs2_assert_warn(qd->qd_gl->gl_sbd, |
| 404 | test_bit(QDF_LOCKED, &qd->qd_flags)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 405 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
| 406 | bh_put(qd); |
| 407 | slot_put(qd); |
| 408 | qd_put(qd); |
| 409 | } |
| 410 | |
| 411 | static int qdsb_get(struct gfs2_sbd *sdp, int user, uint32_t id, int create, |
| 412 | struct gfs2_quota_data **qdp) |
| 413 | { |
| 414 | int error; |
| 415 | |
| 416 | error = qd_get(sdp, user, id, create, qdp); |
| 417 | if (error) |
| 418 | return error; |
| 419 | |
| 420 | error = slot_get(*qdp); |
| 421 | if (error) |
| 422 | goto fail; |
| 423 | |
| 424 | error = bh_get(*qdp); |
| 425 | if (error) |
| 426 | goto fail_slot; |
| 427 | |
| 428 | return 0; |
| 429 | |
| 430 | fail_slot: |
| 431 | slot_put(*qdp); |
| 432 | |
| 433 | fail: |
| 434 | qd_put(*qdp); |
| 435 | return error; |
| 436 | } |
| 437 | |
| 438 | static void qdsb_put(struct gfs2_quota_data *qd) |
| 439 | { |
| 440 | bh_put(qd); |
| 441 | slot_put(qd); |
| 442 | qd_put(qd); |
| 443 | } |
| 444 | |
| 445 | int gfs2_quota_hold(struct gfs2_inode *ip, uint32_t uid, uint32_t gid) |
| 446 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 447 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 448 | struct gfs2_alloc *al = &ip->i_alloc; |
| 449 | struct gfs2_quota_data **qd = al->al_qd; |
| 450 | int error; |
| 451 | |
| 452 | if (gfs2_assert_warn(sdp, !al->al_qd_num) || |
| 453 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) |
| 454 | return -EIO; |
| 455 | |
| 456 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) |
| 457 | return 0; |
| 458 | |
| 459 | error = qdsb_get(sdp, QUOTA_USER, ip->i_di.di_uid, CREATE, qd); |
| 460 | if (error) |
| 461 | goto out; |
| 462 | al->al_qd_num++; |
| 463 | qd++; |
| 464 | |
| 465 | error = qdsb_get(sdp, QUOTA_GROUP, ip->i_di.di_gid, CREATE, qd); |
| 466 | if (error) |
| 467 | goto out; |
| 468 | al->al_qd_num++; |
| 469 | qd++; |
| 470 | |
| 471 | if (uid != NO_QUOTA_CHANGE && uid != ip->i_di.di_uid) { |
| 472 | error = qdsb_get(sdp, QUOTA_USER, uid, CREATE, qd); |
| 473 | if (error) |
| 474 | goto out; |
| 475 | al->al_qd_num++; |
| 476 | qd++; |
| 477 | } |
| 478 | |
| 479 | if (gid != NO_QUOTA_CHANGE && gid != ip->i_di.di_gid) { |
| 480 | error = qdsb_get(sdp, QUOTA_GROUP, gid, CREATE, qd); |
| 481 | if (error) |
| 482 | goto out; |
| 483 | al->al_qd_num++; |
| 484 | qd++; |
| 485 | } |
| 486 | |
| 487 | out: |
| 488 | if (error) |
| 489 | gfs2_quota_unhold(ip); |
| 490 | |
| 491 | return error; |
| 492 | } |
| 493 | |
| 494 | void gfs2_quota_unhold(struct gfs2_inode *ip) |
| 495 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 496 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 497 | struct gfs2_alloc *al = &ip->i_alloc; |
| 498 | unsigned int x; |
| 499 | |
| 500 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)); |
| 501 | |
| 502 | for (x = 0; x < al->al_qd_num; x++) { |
| 503 | qdsb_put(al->al_qd[x]); |
| 504 | al->al_qd[x] = NULL; |
| 505 | } |
| 506 | al->al_qd_num = 0; |
| 507 | } |
| 508 | |
| 509 | static int sort_qd(const void *a, const void *b) |
| 510 | { |
| 511 | struct gfs2_quota_data *qd_a = *(struct gfs2_quota_data **)a; |
| 512 | struct gfs2_quota_data *qd_b = *(struct gfs2_quota_data **)b; |
| 513 | int ret = 0; |
| 514 | |
| 515 | if (!test_bit(QDF_USER, &qd_a->qd_flags) != |
| 516 | !test_bit(QDF_USER, &qd_b->qd_flags)) { |
| 517 | if (test_bit(QDF_USER, &qd_a->qd_flags)) |
| 518 | ret = -1; |
| 519 | else |
| 520 | ret = 1; |
| 521 | } else { |
| 522 | if (qd_a->qd_id < qd_b->qd_id) |
| 523 | ret = -1; |
| 524 | else if (qd_a->qd_id > qd_b->qd_id) |
| 525 | ret = 1; |
| 526 | } |
| 527 | |
| 528 | return ret; |
| 529 | } |
| 530 | |
| 531 | static void do_qc(struct gfs2_quota_data *qd, int64_t change) |
| 532 | { |
| 533 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 534 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 535 | struct gfs2_quota_change *qc = qd->qd_bh_qc; |
| 536 | int64_t x; |
| 537 | |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 538 | mutex_lock(&sdp->sd_quota_mutex); |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 539 | gfs2_trans_add_bh(ip->i_gl, qd->qd_bh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 540 | |
| 541 | if (!test_bit(QDF_CHANGE, &qd->qd_flags)) { |
| 542 | qc->qc_change = 0; |
| 543 | qc->qc_flags = 0; |
| 544 | if (test_bit(QDF_USER, &qd->qd_flags)) |
| 545 | qc->qc_flags = cpu_to_be32(GFS2_QCF_USER); |
| 546 | qc->qc_id = cpu_to_be32(qd->qd_id); |
| 547 | } |
| 548 | |
| 549 | x = qc->qc_change; |
| 550 | x = be64_to_cpu(x) + change; |
| 551 | qc->qc_change = cpu_to_be64(x); |
| 552 | |
| 553 | spin_lock(&sdp->sd_quota_spin); |
| 554 | qd->qd_change = x; |
| 555 | spin_unlock(&sdp->sd_quota_spin); |
| 556 | |
| 557 | if (!x) { |
| 558 | gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags)); |
| 559 | clear_bit(QDF_CHANGE, &qd->qd_flags); |
| 560 | qc->qc_flags = 0; |
| 561 | qc->qc_id = 0; |
| 562 | slot_put(qd); |
| 563 | qd_put(qd); |
| 564 | } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { |
| 565 | qd_hold(qd); |
| 566 | slot_hold(qd); |
| 567 | } |
| 568 | |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 569 | mutex_unlock(&sdp->sd_quota_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 570 | } |
| 571 | |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 572 | /** |
| 573 | * gfs2_adjust_quota |
| 574 | * |
| 575 | * This function was mostly borrowed from gfs2_block_truncate_page which was |
| 576 | * in turn mostly borrowed from ext3 |
| 577 | */ |
| 578 | static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc, |
| 579 | int64_t change, struct gfs2_quota_data *qd) |
| 580 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 581 | struct inode *inode = &ip->i_inode; |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 582 | struct address_space *mapping = inode->i_mapping; |
| 583 | unsigned long index = loc >> PAGE_CACHE_SHIFT; |
| 584 | unsigned offset = loc & (PAGE_CACHE_SHIFT - 1); |
| 585 | unsigned blocksize, iblock, pos; |
| 586 | struct buffer_head *bh; |
| 587 | struct page *page; |
| 588 | void *kaddr; |
| 589 | __be64 *ptr; |
| 590 | u64 value; |
| 591 | int err = -EIO; |
| 592 | |
| 593 | page = grab_cache_page(mapping, index); |
| 594 | if (!page) |
| 595 | return -ENOMEM; |
| 596 | |
| 597 | blocksize = inode->i_sb->s_blocksize; |
| 598 | iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits); |
| 599 | |
| 600 | if (!page_has_buffers(page)) |
| 601 | create_empty_buffers(page, blocksize, 0); |
| 602 | |
| 603 | bh = page_buffers(page); |
| 604 | pos = blocksize; |
| 605 | while (offset >= pos) { |
| 606 | bh = bh->b_this_page; |
| 607 | iblock++; |
| 608 | pos += blocksize; |
| 609 | } |
| 610 | |
| 611 | if (!buffer_mapped(bh)) { |
| 612 | gfs2_get_block(inode, iblock, bh, 1); |
| 613 | if (!buffer_mapped(bh)) |
| 614 | goto unlock; |
| 615 | } |
| 616 | |
| 617 | if (PageUptodate(page)) |
| 618 | set_buffer_uptodate(bh); |
| 619 | |
| 620 | if (!buffer_uptodate(bh)) { |
| 621 | ll_rw_block(READ, 1, &bh); |
| 622 | wait_on_buffer(bh); |
| 623 | if (!buffer_uptodate(bh)) |
| 624 | goto unlock; |
| 625 | } |
| 626 | |
| 627 | gfs2_trans_add_bh(ip->i_gl, bh, 0); |
| 628 | |
| 629 | kaddr = kmap_atomic(page, KM_USER0); |
| 630 | ptr = (__be64 *)(kaddr + offset); |
| 631 | value = *ptr = cpu_to_be64(be64_to_cpu(*ptr) + change); |
| 632 | flush_dcache_page(page); |
| 633 | kunmap_atomic(kaddr, KM_USER0); |
| 634 | err = 0; |
| 635 | qd->qd_qb.qb_magic = cpu_to_be32(GFS2_MAGIC); |
| 636 | #if 0 |
| 637 | qd->qd_qb.qb_limit = cpu_to_be64(q.qu_limit); |
| 638 | qd->qd_qb.qb_warn = cpu_to_be64(q.qu_warn); |
| 639 | #endif |
| 640 | qd->qd_qb.qb_value = cpu_to_be64(value); |
| 641 | unlock: |
| 642 | unlock_page(page); |
| 643 | page_cache_release(page); |
| 644 | return err; |
| 645 | } |
| 646 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 647 | static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) |
| 648 | { |
| 649 | struct gfs2_sbd *sdp = (*qda)->qd_gl->gl_sbd; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 650 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 651 | unsigned int data_blocks, ind_blocks; |
Steven Whitehouse | f42faf4 | 2006-01-30 18:34:10 +0000 | [diff] [blame] | 652 | struct file_ra_state ra_state; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 653 | struct gfs2_holder *ghs, i_gh; |
| 654 | unsigned int qx, x; |
| 655 | struct gfs2_quota_data *qd; |
Steven Whitehouse | f42faf4 | 2006-01-30 18:34:10 +0000 | [diff] [blame] | 656 | loff_t offset; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 657 | unsigned int nalloc = 0; |
| 658 | struct gfs2_alloc *al = NULL; |
| 659 | int error; |
| 660 | |
| 661 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
| 662 | &data_blocks, &ind_blocks); |
| 663 | |
| 664 | ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_KERNEL); |
| 665 | if (!ghs) |
| 666 | return -ENOMEM; |
| 667 | |
| 668 | sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL); |
| 669 | for (qx = 0; qx < num_qd; qx++) { |
| 670 | error = gfs2_glock_nq_init(qda[qx]->qd_gl, |
| 671 | LM_ST_EXCLUSIVE, |
| 672 | GL_NOCACHE, &ghs[qx]); |
| 673 | if (error) |
| 674 | goto out; |
| 675 | } |
| 676 | |
| 677 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
| 678 | if (error) |
| 679 | goto out; |
| 680 | |
| 681 | for (x = 0; x < num_qd; x++) { |
| 682 | int alloc_required; |
| 683 | |
| 684 | offset = qd2offset(qda[x]); |
| 685 | error = gfs2_write_alloc_required(ip, offset, |
| 686 | sizeof(struct gfs2_quota), |
| 687 | &alloc_required); |
| 688 | if (error) |
| 689 | goto out_gunlock; |
| 690 | if (alloc_required) |
| 691 | nalloc++; |
| 692 | } |
| 693 | |
| 694 | if (nalloc) { |
| 695 | al = gfs2_alloc_get(ip); |
| 696 | |
| 697 | al->al_requested = nalloc * (data_blocks + ind_blocks); |
| 698 | |
| 699 | error = gfs2_inplace_reserve(ip); |
| 700 | if (error) |
| 701 | goto out_alloc; |
| 702 | |
| 703 | error = gfs2_trans_begin(sdp, |
| 704 | al->al_rgd->rd_ri.ri_length + |
| 705 | num_qd * data_blocks + |
| 706 | nalloc * ind_blocks + |
| 707 | RES_DINODE + num_qd + |
| 708 | RES_STATFS, 0); |
| 709 | if (error) |
| 710 | goto out_ipres; |
| 711 | } else { |
| 712 | error = gfs2_trans_begin(sdp, |
| 713 | num_qd * data_blocks + |
| 714 | RES_DINODE + num_qd, 0); |
| 715 | if (error) |
| 716 | goto out_gunlock; |
| 717 | } |
| 718 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 719 | file_ra_state_init(&ra_state, ip->i_inode.i_mapping); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 720 | for (x = 0; x < num_qd; x++) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 721 | qd = qda[x]; |
| 722 | offset = qd2offset(qd); |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 723 | error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, |
Steven Whitehouse | 568f4c9 | 2006-02-27 12:00:42 -0500 | [diff] [blame] | 724 | (struct gfs2_quota_data *) |
| 725 | qd->qd_gl->gl_lvb); |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 726 | if (error) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 727 | goto out_end_trans; |
| 728 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 729 | do_qc(qd, -qd->qd_change_sync); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 730 | } |
| 731 | |
| 732 | error = 0; |
| 733 | |
| 734 | out_end_trans: |
| 735 | gfs2_trans_end(sdp); |
| 736 | |
| 737 | out_ipres: |
| 738 | if (nalloc) |
| 739 | gfs2_inplace_release(ip); |
| 740 | |
| 741 | out_alloc: |
| 742 | if (nalloc) |
| 743 | gfs2_alloc_put(ip); |
| 744 | |
| 745 | out_gunlock: |
| 746 | gfs2_glock_dq_uninit(&i_gh); |
| 747 | |
| 748 | out: |
| 749 | while (qx--) |
| 750 | gfs2_glock_dq_uninit(&ghs[qx]); |
| 751 | kfree(ghs); |
Steven Whitehouse | b09e593 | 2006-04-07 11:17:32 -0400 | [diff] [blame] | 752 | gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 753 | |
| 754 | return error; |
| 755 | } |
| 756 | |
| 757 | static int do_glock(struct gfs2_quota_data *qd, int force_refresh, |
| 758 | struct gfs2_holder *q_gh) |
| 759 | { |
| 760 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 761 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 762 | struct gfs2_holder i_gh; |
| 763 | struct gfs2_quota q; |
| 764 | char buf[sizeof(struct gfs2_quota)]; |
Steven Whitehouse | f42faf4 | 2006-01-30 18:34:10 +0000 | [diff] [blame] | 765 | struct file_ra_state ra_state; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 766 | int error; |
| 767 | |
Steven Whitehouse | f42faf4 | 2006-01-30 18:34:10 +0000 | [diff] [blame] | 768 | file_ra_state_init(&ra_state, sdp->sd_quota_inode->i_mapping); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 769 | restart: |
| 770 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh); |
| 771 | if (error) |
| 772 | return error; |
| 773 | |
| 774 | gfs2_quota_lvb_in(&qd->qd_qb, qd->qd_gl->gl_lvb); |
| 775 | |
| 776 | if (force_refresh || qd->qd_qb.qb_magic != GFS2_MAGIC) { |
Steven Whitehouse | f42faf4 | 2006-01-30 18:34:10 +0000 | [diff] [blame] | 777 | loff_t pos; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 778 | gfs2_glock_dq_uninit(q_gh); |
| 779 | error = gfs2_glock_nq_init(qd->qd_gl, |
| 780 | LM_ST_EXCLUSIVE, GL_NOCACHE, |
| 781 | q_gh); |
| 782 | if (error) |
| 783 | return error; |
| 784 | |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 785 | error = gfs2_glock_nq_init(ip->i_gl, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 786 | LM_ST_SHARED, 0, |
| 787 | &i_gh); |
| 788 | if (error) |
| 789 | goto fail; |
| 790 | |
| 791 | memset(buf, 0, sizeof(struct gfs2_quota)); |
Steven Whitehouse | f42faf4 | 2006-01-30 18:34:10 +0000 | [diff] [blame] | 792 | pos = qd2offset(qd); |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 793 | error = gfs2_internal_read(ip, |
Steven Whitehouse | f42faf4 | 2006-01-30 18:34:10 +0000 | [diff] [blame] | 794 | &ra_state, buf, |
| 795 | &pos, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 796 | sizeof(struct gfs2_quota)); |
| 797 | if (error < 0) |
| 798 | goto fail_gunlock; |
| 799 | |
| 800 | gfs2_glock_dq_uninit(&i_gh); |
| 801 | |
| 802 | gfs2_quota_in(&q, buf); |
| 803 | |
| 804 | memset(&qd->qd_qb, 0, sizeof(struct gfs2_quota_lvb)); |
| 805 | qd->qd_qb.qb_magic = GFS2_MAGIC; |
| 806 | qd->qd_qb.qb_limit = q.qu_limit; |
| 807 | qd->qd_qb.qb_warn = q.qu_warn; |
| 808 | qd->qd_qb.qb_value = q.qu_value; |
| 809 | |
| 810 | gfs2_quota_lvb_out(&qd->qd_qb, qd->qd_gl->gl_lvb); |
| 811 | |
| 812 | if (gfs2_glock_is_blocking(qd->qd_gl)) { |
| 813 | gfs2_glock_dq_uninit(q_gh); |
| 814 | force_refresh = 0; |
| 815 | goto restart; |
| 816 | } |
| 817 | } |
| 818 | |
| 819 | return 0; |
| 820 | |
| 821 | fail_gunlock: |
| 822 | gfs2_glock_dq_uninit(&i_gh); |
| 823 | |
| 824 | fail: |
| 825 | gfs2_glock_dq_uninit(q_gh); |
| 826 | |
| 827 | return error; |
| 828 | } |
| 829 | |
| 830 | int gfs2_quota_lock(struct gfs2_inode *ip, uint32_t uid, uint32_t gid) |
| 831 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 832 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 833 | struct gfs2_alloc *al = &ip->i_alloc; |
| 834 | unsigned int x; |
| 835 | int error = 0; |
| 836 | |
| 837 | gfs2_quota_hold(ip, uid, gid); |
| 838 | |
| 839 | if (capable(CAP_SYS_RESOURCE) || |
| 840 | sdp->sd_args.ar_quota != GFS2_QUOTA_ON) |
| 841 | return 0; |
| 842 | |
| 843 | sort(al->al_qd, al->al_qd_num, sizeof(struct gfs2_quota_data *), |
| 844 | sort_qd, NULL); |
| 845 | |
| 846 | for (x = 0; x < al->al_qd_num; x++) { |
| 847 | error = do_glock(al->al_qd[x], NO_FORCE, &al->al_qd_ghs[x]); |
| 848 | if (error) |
| 849 | break; |
| 850 | } |
| 851 | |
| 852 | if (!error) |
| 853 | set_bit(GIF_QD_LOCKED, &ip->i_flags); |
| 854 | else { |
| 855 | while (x--) |
| 856 | gfs2_glock_dq_uninit(&al->al_qd_ghs[x]); |
| 857 | gfs2_quota_unhold(ip); |
| 858 | } |
| 859 | |
| 860 | return error; |
| 861 | } |
| 862 | |
| 863 | static int need_sync(struct gfs2_quota_data *qd) |
| 864 | { |
| 865 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
| 866 | struct gfs2_tune *gt = &sdp->sd_tune; |
| 867 | int64_t value; |
| 868 | unsigned int num, den; |
| 869 | int do_sync = 1; |
| 870 | |
| 871 | if (!qd->qd_qb.qb_limit) |
| 872 | return 0; |
| 873 | |
| 874 | spin_lock(&sdp->sd_quota_spin); |
| 875 | value = qd->qd_change; |
| 876 | spin_unlock(&sdp->sd_quota_spin); |
| 877 | |
| 878 | spin_lock(>->gt_spin); |
| 879 | num = gt->gt_quota_scale_num; |
| 880 | den = gt->gt_quota_scale_den; |
| 881 | spin_unlock(>->gt_spin); |
| 882 | |
| 883 | if (value < 0) |
| 884 | do_sync = 0; |
| 885 | else if (qd->qd_qb.qb_value >= (int64_t)qd->qd_qb.qb_limit) |
| 886 | do_sync = 0; |
| 887 | else { |
| 888 | value *= gfs2_jindex_size(sdp) * num; |
| 889 | do_div(value, den); |
| 890 | value += qd->qd_qb.qb_value; |
| 891 | if (value < (int64_t)qd->qd_qb.qb_limit) |
| 892 | do_sync = 0; |
| 893 | } |
| 894 | |
| 895 | return do_sync; |
| 896 | } |
| 897 | |
| 898 | void gfs2_quota_unlock(struct gfs2_inode *ip) |
| 899 | { |
| 900 | struct gfs2_alloc *al = &ip->i_alloc; |
| 901 | struct gfs2_quota_data *qda[4]; |
| 902 | unsigned int count = 0; |
| 903 | unsigned int x; |
| 904 | |
| 905 | if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags)) |
| 906 | goto out; |
| 907 | |
| 908 | for (x = 0; x < al->al_qd_num; x++) { |
| 909 | struct gfs2_quota_data *qd; |
| 910 | int sync; |
| 911 | |
| 912 | qd = al->al_qd[x]; |
| 913 | sync = need_sync(qd); |
| 914 | |
| 915 | gfs2_glock_dq_uninit(&al->al_qd_ghs[x]); |
| 916 | |
| 917 | if (sync && qd_trylock(qd)) |
| 918 | qda[count++] = qd; |
| 919 | } |
| 920 | |
| 921 | if (count) { |
| 922 | do_sync(count, qda); |
| 923 | for (x = 0; x < count; x++) |
| 924 | qd_unlock(qda[x]); |
| 925 | } |
| 926 | |
| 927 | out: |
| 928 | gfs2_quota_unhold(ip); |
| 929 | } |
| 930 | |
| 931 | #define MAX_LINE 256 |
| 932 | |
| 933 | static int print_message(struct gfs2_quota_data *qd, char *type) |
| 934 | { |
| 935 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
| 936 | char *line; |
| 937 | int len; |
| 938 | |
| 939 | line = kmalloc(MAX_LINE, GFP_KERNEL); |
| 940 | if (!line) |
| 941 | return -ENOMEM; |
| 942 | |
Steven Whitehouse | 568f4c9 | 2006-02-27 12:00:42 -0500 | [diff] [blame] | 943 | len = snprintf(line, MAX_LINE-1, |
| 944 | "GFS2: fsid=%s: quota %s for %s %u\r\n", |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 945 | sdp->sd_fsname, type, |
| 946 | (test_bit(QDF_USER, &qd->qd_flags)) ? "user" : "group", |
| 947 | qd->qd_id); |
| 948 | line[MAX_LINE-1] = 0; |
| 949 | |
| 950 | if (current->signal) { /* Is this test still required? */ |
| 951 | tty_write_message(current->signal->tty, line); |
| 952 | } |
| 953 | |
| 954 | kfree(line); |
| 955 | |
| 956 | return 0; |
| 957 | } |
| 958 | |
| 959 | int gfs2_quota_check(struct gfs2_inode *ip, uint32_t uid, uint32_t gid) |
| 960 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 961 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 962 | struct gfs2_alloc *al = &ip->i_alloc; |
| 963 | struct gfs2_quota_data *qd; |
| 964 | int64_t value; |
| 965 | unsigned int x; |
| 966 | int error = 0; |
| 967 | |
| 968 | if (!test_bit(GIF_QD_LOCKED, &ip->i_flags)) |
| 969 | return 0; |
| 970 | |
| 971 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) |
| 972 | return 0; |
| 973 | |
| 974 | for (x = 0; x < al->al_qd_num; x++) { |
| 975 | qd = al->al_qd[x]; |
| 976 | |
| 977 | if (!((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) || |
| 978 | (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags)))) |
| 979 | continue; |
| 980 | |
| 981 | value = qd->qd_qb.qb_value; |
| 982 | spin_lock(&sdp->sd_quota_spin); |
| 983 | value += qd->qd_change; |
| 984 | spin_unlock(&sdp->sd_quota_spin); |
| 985 | |
| 986 | if (qd->qd_qb.qb_limit && (int64_t)qd->qd_qb.qb_limit < value) { |
| 987 | print_message(qd, "exceeded"); |
| 988 | error = -EDQUOT; |
| 989 | break; |
| 990 | } else if (qd->qd_qb.qb_warn && |
| 991 | (int64_t)qd->qd_qb.qb_warn < value && |
| 992 | time_after_eq(jiffies, qd->qd_last_warn + |
Steven Whitehouse | 568f4c9 | 2006-02-27 12:00:42 -0500 | [diff] [blame] | 993 | gfs2_tune_get(sdp, |
| 994 | gt_quota_warn_period) * HZ)) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 995 | error = print_message(qd, "warning"); |
| 996 | qd->qd_last_warn = jiffies; |
| 997 | } |
| 998 | } |
| 999 | |
| 1000 | return error; |
| 1001 | } |
| 1002 | |
| 1003 | void gfs2_quota_change(struct gfs2_inode *ip, int64_t change, |
| 1004 | uint32_t uid, uint32_t gid) |
| 1005 | { |
| 1006 | struct gfs2_alloc *al = &ip->i_alloc; |
| 1007 | struct gfs2_quota_data *qd; |
| 1008 | unsigned int x; |
| 1009 | unsigned int found = 0; |
| 1010 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1011 | if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1012 | return; |
| 1013 | if (ip->i_di.di_flags & GFS2_DIF_SYSTEM) |
| 1014 | return; |
| 1015 | |
| 1016 | for (x = 0; x < al->al_qd_num; x++) { |
| 1017 | qd = al->al_qd[x]; |
| 1018 | |
| 1019 | if ((qd->qd_id == uid && test_bit(QDF_USER, &qd->qd_flags)) || |
| 1020 | (qd->qd_id == gid && !test_bit(QDF_USER, &qd->qd_flags))) { |
| 1021 | do_qc(qd, change); |
| 1022 | found++; |
| 1023 | } |
| 1024 | } |
| 1025 | } |
| 1026 | |
| 1027 | int gfs2_quota_sync(struct gfs2_sbd *sdp) |
| 1028 | { |
| 1029 | struct gfs2_quota_data **qda; |
| 1030 | unsigned int max_qd = gfs2_tune_get(sdp, gt_quota_simul_sync); |
| 1031 | unsigned int num_qd; |
| 1032 | unsigned int x; |
| 1033 | int error = 0; |
| 1034 | |
| 1035 | sdp->sd_quota_sync_gen++; |
| 1036 | |
| 1037 | qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL); |
| 1038 | if (!qda) |
| 1039 | return -ENOMEM; |
| 1040 | |
| 1041 | do { |
| 1042 | num_qd = 0; |
| 1043 | |
| 1044 | for (;;) { |
| 1045 | error = qd_fish(sdp, qda + num_qd); |
| 1046 | if (error || !qda[num_qd]) |
| 1047 | break; |
| 1048 | if (++num_qd == max_qd) |
| 1049 | break; |
| 1050 | } |
| 1051 | |
| 1052 | if (num_qd) { |
| 1053 | if (!error) |
| 1054 | error = do_sync(num_qd, qda); |
| 1055 | if (!error) |
| 1056 | for (x = 0; x < num_qd; x++) |
| 1057 | qda[x]->qd_sync_gen = |
| 1058 | sdp->sd_quota_sync_gen; |
| 1059 | |
| 1060 | for (x = 0; x < num_qd; x++) |
| 1061 | qd_unlock(qda[x]); |
| 1062 | } |
| 1063 | } while (!error && num_qd == max_qd); |
| 1064 | |
| 1065 | kfree(qda); |
| 1066 | |
| 1067 | return error; |
| 1068 | } |
| 1069 | |
| 1070 | int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, uint32_t id) |
| 1071 | { |
| 1072 | struct gfs2_quota_data *qd; |
| 1073 | struct gfs2_holder q_gh; |
| 1074 | int error; |
| 1075 | |
| 1076 | error = qd_get(sdp, user, id, CREATE, &qd); |
| 1077 | if (error) |
| 1078 | return error; |
| 1079 | |
| 1080 | error = do_glock(qd, FORCE, &q_gh); |
| 1081 | if (!error) |
| 1082 | gfs2_glock_dq_uninit(&q_gh); |
| 1083 | |
| 1084 | qd_put(qd); |
| 1085 | |
| 1086 | return error; |
| 1087 | } |
| 1088 | |
Adrian Bunk | 08bc2db | 2006-04-28 10:59:12 -0400 | [diff] [blame] | 1089 | #if 0 |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1090 | int gfs2_quota_read(struct gfs2_sbd *sdp, int user, uint32_t id, |
| 1091 | struct gfs2_quota *q) |
| 1092 | { |
| 1093 | struct gfs2_quota_data *qd; |
| 1094 | struct gfs2_holder q_gh; |
| 1095 | int error; |
| 1096 | |
| 1097 | if (((user) ? (id != current->fsuid) : (!in_group_p(id))) && |
| 1098 | !capable(CAP_SYS_ADMIN)) |
| 1099 | return -EACCES; |
| 1100 | |
| 1101 | error = qd_get(sdp, user, id, CREATE, &qd); |
| 1102 | if (error) |
| 1103 | return error; |
| 1104 | |
| 1105 | error = do_glock(qd, NO_FORCE, &q_gh); |
| 1106 | if (error) |
| 1107 | goto out; |
| 1108 | |
| 1109 | memset(q, 0, sizeof(struct gfs2_quota)); |
| 1110 | q->qu_limit = qd->qd_qb.qb_limit; |
| 1111 | q->qu_warn = qd->qd_qb.qb_warn; |
| 1112 | q->qu_value = qd->qd_qb.qb_value; |
| 1113 | |
| 1114 | spin_lock(&sdp->sd_quota_spin); |
| 1115 | q->qu_value += qd->qd_change; |
| 1116 | spin_unlock(&sdp->sd_quota_spin); |
| 1117 | |
| 1118 | gfs2_glock_dq_uninit(&q_gh); |
| 1119 | |
| 1120 | out: |
| 1121 | qd_put(qd); |
| 1122 | |
| 1123 | return error; |
| 1124 | } |
Adrian Bunk | 08bc2db | 2006-04-28 10:59:12 -0400 | [diff] [blame] | 1125 | #endif /* 0 */ |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1126 | |
| 1127 | int gfs2_quota_init(struct gfs2_sbd *sdp) |
| 1128 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1129 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1130 | unsigned int blocks = ip->i_di.di_size >> sdp->sd_sb.sb_bsize_shift; |
| 1131 | unsigned int x, slot = 0; |
| 1132 | unsigned int found = 0; |
| 1133 | uint64_t dblock; |
| 1134 | uint32_t extlen = 0; |
| 1135 | int error; |
| 1136 | |
| 1137 | if (!ip->i_di.di_size || |
| 1138 | ip->i_di.di_size > (64 << 20) || |
| 1139 | ip->i_di.di_size & (sdp->sd_sb.sb_bsize - 1)) { |
| 1140 | gfs2_consist_inode(ip); |
| 1141 | return -EIO; |
| 1142 | } |
| 1143 | sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block; |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 1144 | sdp->sd_quota_chunks = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * PAGE_SIZE); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1145 | |
| 1146 | error = -ENOMEM; |
| 1147 | |
| 1148 | sdp->sd_quota_bitmap = kcalloc(sdp->sd_quota_chunks, |
| 1149 | sizeof(unsigned char *), GFP_KERNEL); |
| 1150 | if (!sdp->sd_quota_bitmap) |
| 1151 | return error; |
| 1152 | |
| 1153 | for (x = 0; x < sdp->sd_quota_chunks; x++) { |
| 1154 | sdp->sd_quota_bitmap[x] = kzalloc(PAGE_SIZE, GFP_KERNEL); |
| 1155 | if (!sdp->sd_quota_bitmap[x]) |
| 1156 | goto fail; |
| 1157 | } |
| 1158 | |
| 1159 | for (x = 0; x < blocks; x++) { |
| 1160 | struct buffer_head *bh; |
| 1161 | unsigned int y; |
| 1162 | |
| 1163 | if (!extlen) { |
| 1164 | int new = 0; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1165 | error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1166 | if (error) |
| 1167 | goto fail; |
| 1168 | } |
| 1169 | gfs2_meta_ra(ip->i_gl, dblock, extlen); |
| 1170 | error = gfs2_meta_read(ip->i_gl, dblock, DIO_START | DIO_WAIT, |
| 1171 | &bh); |
| 1172 | if (error) |
| 1173 | goto fail; |
| 1174 | error = -EIO; |
| 1175 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) { |
| 1176 | brelse(bh); |
| 1177 | goto fail; |
| 1178 | } |
| 1179 | |
| 1180 | for (y = 0; |
| 1181 | y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots; |
| 1182 | y++, slot++) { |
| 1183 | struct gfs2_quota_change qc; |
| 1184 | struct gfs2_quota_data *qd; |
| 1185 | |
| 1186 | gfs2_quota_change_in(&qc, bh->b_data + |
| 1187 | sizeof(struct gfs2_meta_header) + |
| 1188 | y * sizeof(struct gfs2_quota_change)); |
| 1189 | if (!qc.qc_change) |
| 1190 | continue; |
| 1191 | |
| 1192 | error = qd_alloc(sdp, (qc.qc_flags & GFS2_QCF_USER), |
| 1193 | qc.qc_id, &qd); |
| 1194 | if (error) { |
| 1195 | brelse(bh); |
| 1196 | goto fail; |
| 1197 | } |
| 1198 | |
| 1199 | set_bit(QDF_CHANGE, &qd->qd_flags); |
| 1200 | qd->qd_change = qc.qc_change; |
| 1201 | qd->qd_slot = slot; |
| 1202 | qd->qd_slot_count = 1; |
| 1203 | qd->qd_last_touched = jiffies; |
| 1204 | |
| 1205 | spin_lock(&sdp->sd_quota_spin); |
| 1206 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, slot, 1); |
| 1207 | list_add(&qd->qd_list, &sdp->sd_quota_list); |
| 1208 | atomic_inc(&sdp->sd_quota_count); |
| 1209 | spin_unlock(&sdp->sd_quota_spin); |
| 1210 | |
| 1211 | found++; |
| 1212 | } |
| 1213 | |
| 1214 | brelse(bh); |
| 1215 | dblock++; |
| 1216 | extlen--; |
| 1217 | } |
| 1218 | |
| 1219 | if (found) |
| 1220 | fs_info(sdp, "found %u quota changes\n", found); |
| 1221 | |
| 1222 | return 0; |
| 1223 | |
| 1224 | fail: |
| 1225 | gfs2_quota_cleanup(sdp); |
| 1226 | return error; |
| 1227 | } |
| 1228 | |
| 1229 | void gfs2_quota_scan(struct gfs2_sbd *sdp) |
| 1230 | { |
| 1231 | struct gfs2_quota_data *qd, *safe; |
| 1232 | LIST_HEAD(dead); |
| 1233 | |
| 1234 | spin_lock(&sdp->sd_quota_spin); |
| 1235 | list_for_each_entry_safe(qd, safe, &sdp->sd_quota_list, qd_list) { |
| 1236 | if (!qd->qd_count && |
| 1237 | time_after_eq(jiffies, qd->qd_last_touched + |
| 1238 | gfs2_tune_get(sdp, gt_quota_cache_secs) * HZ)) { |
| 1239 | list_move(&qd->qd_list, &dead); |
| 1240 | gfs2_assert_warn(sdp, |
| 1241 | atomic_read(&sdp->sd_quota_count) > 0); |
| 1242 | atomic_dec(&sdp->sd_quota_count); |
| 1243 | } |
| 1244 | } |
| 1245 | spin_unlock(&sdp->sd_quota_spin); |
| 1246 | |
| 1247 | while (!list_empty(&dead)) { |
| 1248 | qd = list_entry(dead.next, struct gfs2_quota_data, qd_list); |
| 1249 | list_del(&qd->qd_list); |
| 1250 | |
| 1251 | gfs2_assert_warn(sdp, !qd->qd_change); |
| 1252 | gfs2_assert_warn(sdp, !qd->qd_slot_count); |
| 1253 | gfs2_assert_warn(sdp, !qd->qd_bh_count); |
| 1254 | |
| 1255 | gfs2_lvb_unhold(qd->qd_gl); |
| 1256 | kfree(qd); |
| 1257 | } |
| 1258 | } |
| 1259 | |
| 1260 | void gfs2_quota_cleanup(struct gfs2_sbd *sdp) |
| 1261 | { |
| 1262 | struct list_head *head = &sdp->sd_quota_list; |
| 1263 | struct gfs2_quota_data *qd; |
| 1264 | unsigned int x; |
| 1265 | |
| 1266 | spin_lock(&sdp->sd_quota_spin); |
| 1267 | while (!list_empty(head)) { |
| 1268 | qd = list_entry(head->prev, struct gfs2_quota_data, qd_list); |
| 1269 | |
| 1270 | if (qd->qd_count > 1 || |
| 1271 | (qd->qd_count && !test_bit(QDF_CHANGE, &qd->qd_flags))) { |
| 1272 | list_move(&qd->qd_list, head); |
| 1273 | spin_unlock(&sdp->sd_quota_spin); |
| 1274 | schedule(); |
| 1275 | spin_lock(&sdp->sd_quota_spin); |
| 1276 | continue; |
| 1277 | } |
| 1278 | |
| 1279 | list_del(&qd->qd_list); |
| 1280 | atomic_dec(&sdp->sd_quota_count); |
| 1281 | spin_unlock(&sdp->sd_quota_spin); |
| 1282 | |
| 1283 | if (!qd->qd_count) { |
| 1284 | gfs2_assert_warn(sdp, !qd->qd_change); |
| 1285 | gfs2_assert_warn(sdp, !qd->qd_slot_count); |
| 1286 | } else |
| 1287 | gfs2_assert_warn(sdp, qd->qd_slot_count == 1); |
| 1288 | gfs2_assert_warn(sdp, !qd->qd_bh_count); |
| 1289 | |
| 1290 | gfs2_lvb_unhold(qd->qd_gl); |
| 1291 | kfree(qd); |
| 1292 | |
| 1293 | spin_lock(&sdp->sd_quota_spin); |
| 1294 | } |
| 1295 | spin_unlock(&sdp->sd_quota_spin); |
| 1296 | |
| 1297 | gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count)); |
| 1298 | |
| 1299 | if (sdp->sd_quota_bitmap) { |
| 1300 | for (x = 0; x < sdp->sd_quota_chunks; x++) |
| 1301 | kfree(sdp->sd_quota_bitmap[x]); |
| 1302 | kfree(sdp->sd_quota_bitmap); |
| 1303 | } |
| 1304 | } |
| 1305 | |