David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
Bob Peterson | 0d0868b | 2007-12-11 18:51:25 -0600 | [diff] [blame] | 3 | * Copyright (C) 2004-2007 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 |
Steven Whitehouse | e9fc2aa | 2006-09-01 11:05:15 -0400 | [diff] [blame] | 7 | * of the GNU General Public License version 2. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 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. |
Steven Whitehouse | 1e72c0f | 2009-09-15 20:42:56 +0100 | [diff] [blame] | 18 | * Since quota tags are part of transactions, there is no need for a quota check |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 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> |
Ying Han | 1495f23 | 2011-05-24 17:12:27 -0700 | [diff] [blame] | 41 | #include <linux/mm.h> |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 42 | #include <linux/spinlock.h> |
| 43 | #include <linux/completion.h> |
| 44 | #include <linux/buffer_head.h> |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 45 | #include <linux/sort.h> |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 46 | #include <linux/fs.h> |
Steven Whitehouse | 2e565bb | 2006-10-02 11:38:25 -0400 | [diff] [blame] | 47 | #include <linux/bio.h> |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 48 | #include <linux/gfs2_ondisk.h> |
Steven Whitehouse | 37b2c83 | 2008-11-17 14:25:37 +0000 | [diff] [blame] | 49 | #include <linux/kthread.h> |
| 50 | #include <linux/freezer.h> |
Steven Whitehouse | 2ec4650 | 2009-09-28 12:49:15 +0100 | [diff] [blame] | 51 | #include <linux/quota.h> |
Steven Whitehouse | 1d371b5 | 2009-09-11 15:57:27 +0100 | [diff] [blame] | 52 | #include <linux/dqblk_xfs.h> |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 53 | |
| 54 | #include "gfs2.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 55 | #include "incore.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 56 | #include "bmap.h" |
| 57 | #include "glock.h" |
| 58 | #include "glops.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 59 | #include "log.h" |
| 60 | #include "meta_io.h" |
| 61 | #include "quota.h" |
| 62 | #include "rgrp.h" |
| 63 | #include "super.h" |
| 64 | #include "trans.h" |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 65 | #include "inode.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 66 | #include "util.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 67 | |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 68 | struct gfs2_quota_change_host { |
| 69 | u64 qc_change; |
| 70 | u32 qc_flags; /* GFS2_QCF_... */ |
Eric W. Biederman | e08d8d7 | 2013-01-31 19:25:50 -0800 | [diff] [blame] | 71 | struct kqid qc_id; |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 72 | }; |
| 73 | |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 74 | static LIST_HEAD(qd_lru_list); |
| 75 | static atomic_t qd_lru_count = ATOMIC_INIT(0); |
Xu Gang | 1328df7 | 2009-04-14 14:54:14 +0800 | [diff] [blame] | 76 | static DEFINE_SPINLOCK(qd_lru_lock); |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 77 | |
Ying Han | 1495f23 | 2011-05-24 17:12:27 -0700 | [diff] [blame] | 78 | int gfs2_shrink_qd_memory(struct shrinker *shrink, struct shrink_control *sc) |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 79 | { |
| 80 | struct gfs2_quota_data *qd; |
| 81 | struct gfs2_sbd *sdp; |
Ying Han | 1495f23 | 2011-05-24 17:12:27 -0700 | [diff] [blame] | 82 | int nr_to_scan = sc->nr_to_scan; |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 83 | |
Ying Han | 1495f23 | 2011-05-24 17:12:27 -0700 | [diff] [blame] | 84 | if (nr_to_scan == 0) |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 85 | goto out; |
| 86 | |
Ying Han | 1495f23 | 2011-05-24 17:12:27 -0700 | [diff] [blame] | 87 | if (!(sc->gfp_mask & __GFP_FS)) |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 88 | return -1; |
| 89 | |
| 90 | spin_lock(&qd_lru_lock); |
Ying Han | 1495f23 | 2011-05-24 17:12:27 -0700 | [diff] [blame] | 91 | while (nr_to_scan && !list_empty(&qd_lru_list)) { |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 92 | qd = list_entry(qd_lru_list.next, |
| 93 | struct gfs2_quota_data, qd_reclaim); |
| 94 | sdp = qd->qd_gl->gl_sbd; |
| 95 | |
| 96 | /* Free from the filesystem-specific list */ |
| 97 | list_del(&qd->qd_list); |
| 98 | |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 99 | gfs2_assert_warn(sdp, !qd->qd_change); |
| 100 | gfs2_assert_warn(sdp, !qd->qd_slot_count); |
| 101 | gfs2_assert_warn(sdp, !qd->qd_bh_count); |
| 102 | |
Steven Whitehouse | f057f6c | 2009-01-12 10:43:39 +0000 | [diff] [blame] | 103 | gfs2_glock_put(qd->qd_gl); |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 104 | atomic_dec(&sdp->sd_quota_count); |
| 105 | |
| 106 | /* Delete it from the common reclaim list */ |
| 107 | list_del_init(&qd->qd_reclaim); |
| 108 | atomic_dec(&qd_lru_count); |
| 109 | spin_unlock(&qd_lru_lock); |
| 110 | kmem_cache_free(gfs2_quotad_cachep, qd); |
| 111 | spin_lock(&qd_lru_lock); |
Ying Han | 1495f23 | 2011-05-24 17:12:27 -0700 | [diff] [blame] | 112 | nr_to_scan--; |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 113 | } |
| 114 | spin_unlock(&qd_lru_lock); |
| 115 | |
| 116 | out: |
| 117 | return (atomic_read(&qd_lru_count) * sysctl_vfs_cache_pressure) / 100; |
| 118 | } |
| 119 | |
Eric W. Biederman | 2f6c989 | 2013-01-31 18:33:38 -0800 | [diff] [blame] | 120 | static u64 qd2index(struct gfs2_quota_data *qd) |
| 121 | { |
Eric W. Biederman | 05e0a60 | 2013-01-31 19:52:08 -0800 | [diff] [blame] | 122 | struct kqid qid = qd->qd_id; |
| 123 | return (2 * (u64)from_kqid(&init_user_ns, qid)) + |
Bob Peterson | 37f7157 | 2013-05-10 11:59:18 -0400 | [diff] [blame] | 124 | ((qid.type == USRQUOTA) ? 0 : 1); |
Eric W. Biederman | 2f6c989 | 2013-01-31 18:33:38 -0800 | [diff] [blame] | 125 | } |
| 126 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 127 | static u64 qd2offset(struct gfs2_quota_data *qd) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 128 | { |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 129 | u64 offset; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 130 | |
Eric W. Biederman | 2f6c989 | 2013-01-31 18:33:38 -0800 | [diff] [blame] | 131 | offset = qd2index(qd); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 132 | offset *= sizeof(struct gfs2_quota); |
| 133 | |
| 134 | return offset; |
| 135 | } |
| 136 | |
Eric W. Biederman | 05e0a60 | 2013-01-31 19:52:08 -0800 | [diff] [blame] | 137 | static int qd_alloc(struct gfs2_sbd *sdp, struct kqid qid, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 138 | struct gfs2_quota_data **qdp) |
| 139 | { |
| 140 | struct gfs2_quota_data *qd; |
| 141 | int error; |
| 142 | |
Steven Whitehouse | 37b2c83 | 2008-11-17 14:25:37 +0000 | [diff] [blame] | 143 | qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 144 | if (!qd) |
| 145 | return -ENOMEM; |
| 146 | |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 147 | atomic_set(&qd->qd_count, 1); |
Eric W. Biederman | 05e0a60 | 2013-01-31 19:52:08 -0800 | [diff] [blame] | 148 | qd->qd_id = qid; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 149 | qd->qd_slot = -1; |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 150 | INIT_LIST_HEAD(&qd->qd_reclaim); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 151 | |
Eric W. Biederman | 2f6c989 | 2013-01-31 18:33:38 -0800 | [diff] [blame] | 152 | error = gfs2_glock_get(sdp, qd2index(qd), |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 153 | &gfs2_quota_glops, CREATE, &qd->qd_gl); |
| 154 | if (error) |
| 155 | goto fail; |
| 156 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 157 | *qdp = qd; |
| 158 | |
| 159 | return 0; |
| 160 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 161 | fail: |
Steven Whitehouse | 37b2c83 | 2008-11-17 14:25:37 +0000 | [diff] [blame] | 162 | kmem_cache_free(gfs2_quotad_cachep, qd); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 163 | return error; |
| 164 | } |
| 165 | |
Eric W. Biederman | 05e0a60 | 2013-01-31 19:52:08 -0800 | [diff] [blame] | 166 | static int qd_get(struct gfs2_sbd *sdp, struct kqid qid, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 167 | struct gfs2_quota_data **qdp) |
| 168 | { |
| 169 | struct gfs2_quota_data *qd = NULL, *new_qd = NULL; |
| 170 | int error, found; |
| 171 | |
| 172 | *qdp = NULL; |
| 173 | |
| 174 | for (;;) { |
| 175 | found = 0; |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 176 | spin_lock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 177 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { |
Eric W. Biederman | 05e0a60 | 2013-01-31 19:52:08 -0800 | [diff] [blame] | 178 | if (qid_eq(qd->qd_id, qid)) { |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 179 | if (!atomic_read(&qd->qd_count) && |
| 180 | !list_empty(&qd->qd_reclaim)) { |
| 181 | /* Remove it from reclaim list */ |
| 182 | list_del_init(&qd->qd_reclaim); |
| 183 | atomic_dec(&qd_lru_count); |
| 184 | } |
| 185 | atomic_inc(&qd->qd_count); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 186 | found = 1; |
| 187 | break; |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | if (!found) |
| 192 | qd = NULL; |
| 193 | |
| 194 | if (!qd && new_qd) { |
| 195 | qd = new_qd; |
| 196 | list_add(&qd->qd_list, &sdp->sd_quota_list); |
| 197 | atomic_inc(&sdp->sd_quota_count); |
| 198 | new_qd = NULL; |
| 199 | } |
| 200 | |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 201 | spin_unlock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 202 | |
Steven Whitehouse | 6a6ada8 | 2009-09-15 16:30:38 +0100 | [diff] [blame] | 203 | if (qd) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 204 | if (new_qd) { |
Steven Whitehouse | f057f6c | 2009-01-12 10:43:39 +0000 | [diff] [blame] | 205 | gfs2_glock_put(new_qd->qd_gl); |
Steven Whitehouse | 37b2c83 | 2008-11-17 14:25:37 +0000 | [diff] [blame] | 206 | kmem_cache_free(gfs2_quotad_cachep, new_qd); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 207 | } |
| 208 | *qdp = qd; |
| 209 | return 0; |
| 210 | } |
| 211 | |
Eric W. Biederman | 05e0a60 | 2013-01-31 19:52:08 -0800 | [diff] [blame] | 212 | error = qd_alloc(sdp, qid, &new_qd); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 213 | if (error) |
| 214 | return error; |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | static void qd_hold(struct gfs2_quota_data *qd) |
| 219 | { |
| 220 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 221 | gfs2_assert(sdp, atomic_read(&qd->qd_count)); |
| 222 | atomic_inc(&qd->qd_count); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 223 | } |
| 224 | |
| 225 | static void qd_put(struct gfs2_quota_data *qd) |
| 226 | { |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 227 | if (atomic_dec_and_lock(&qd->qd_count, &qd_lru_lock)) { |
| 228 | /* Add to the reclaim list */ |
| 229 | list_add_tail(&qd->qd_reclaim, &qd_lru_list); |
| 230 | atomic_inc(&qd_lru_count); |
| 231 | spin_unlock(&qd_lru_lock); |
| 232 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 233 | } |
| 234 | |
| 235 | static int slot_get(struct gfs2_quota_data *qd) |
| 236 | { |
| 237 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
| 238 | unsigned int c, o = 0, b; |
| 239 | unsigned char byte = 0; |
| 240 | |
Steven Whitehouse | 22077f5 | 2009-01-08 14:28:42 +0000 | [diff] [blame] | 241 | spin_lock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 242 | |
| 243 | if (qd->qd_slot_count++) { |
Steven Whitehouse | 22077f5 | 2009-01-08 14:28:42 +0000 | [diff] [blame] | 244 | spin_unlock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 245 | return 0; |
| 246 | } |
| 247 | |
| 248 | for (c = 0; c < sdp->sd_quota_chunks; c++) |
| 249 | for (o = 0; o < PAGE_SIZE; o++) { |
| 250 | byte = sdp->sd_quota_bitmap[c][o]; |
| 251 | if (byte != 0xFF) |
| 252 | goto found; |
| 253 | } |
| 254 | |
| 255 | goto fail; |
| 256 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 257 | found: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 258 | for (b = 0; b < 8; b++) |
| 259 | if (!(byte & (1 << b))) |
| 260 | break; |
| 261 | qd->qd_slot = c * (8 * PAGE_SIZE) + o * 8 + b; |
| 262 | |
| 263 | if (qd->qd_slot >= sdp->sd_quota_slots) |
| 264 | goto fail; |
| 265 | |
| 266 | sdp->sd_quota_bitmap[c][o] |= 1 << b; |
| 267 | |
Steven Whitehouse | 22077f5 | 2009-01-08 14:28:42 +0000 | [diff] [blame] | 268 | spin_unlock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 269 | |
| 270 | return 0; |
| 271 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 272 | fail: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 273 | qd->qd_slot_count--; |
Steven Whitehouse | 22077f5 | 2009-01-08 14:28:42 +0000 | [diff] [blame] | 274 | spin_unlock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 275 | return -ENOSPC; |
| 276 | } |
| 277 | |
| 278 | static void slot_hold(struct gfs2_quota_data *qd) |
| 279 | { |
| 280 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
| 281 | |
Steven Whitehouse | 22077f5 | 2009-01-08 14:28:42 +0000 | [diff] [blame] | 282 | spin_lock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 283 | gfs2_assert(sdp, qd->qd_slot_count); |
| 284 | qd->qd_slot_count++; |
Steven Whitehouse | 22077f5 | 2009-01-08 14:28:42 +0000 | [diff] [blame] | 285 | spin_unlock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 286 | } |
| 287 | |
| 288 | static void slot_put(struct gfs2_quota_data *qd) |
| 289 | { |
| 290 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
| 291 | |
Steven Whitehouse | 22077f5 | 2009-01-08 14:28:42 +0000 | [diff] [blame] | 292 | spin_lock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 293 | gfs2_assert(sdp, qd->qd_slot_count); |
| 294 | if (!--qd->qd_slot_count) { |
| 295 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, qd->qd_slot, 0); |
| 296 | qd->qd_slot = -1; |
| 297 | } |
Steven Whitehouse | 22077f5 | 2009-01-08 14:28:42 +0000 | [diff] [blame] | 298 | spin_unlock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 299 | } |
| 300 | |
| 301 | static int bh_get(struct gfs2_quota_data *qd) |
| 302 | { |
| 303 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 304 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 305 | unsigned int block, offset; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 306 | struct buffer_head *bh; |
| 307 | int error; |
Steven Whitehouse | 2359125 | 2006-10-13 17:25:45 -0400 | [diff] [blame] | 308 | struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 }; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 309 | |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 310 | mutex_lock(&sdp->sd_quota_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 311 | |
| 312 | if (qd->qd_bh_count++) { |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 313 | mutex_unlock(&sdp->sd_quota_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 314 | return 0; |
| 315 | } |
| 316 | |
| 317 | block = qd->qd_slot / sdp->sd_qc_per_block; |
Bob Peterson | 0d0868b | 2007-12-11 18:51:25 -0600 | [diff] [blame] | 318 | offset = qd->qd_slot % sdp->sd_qc_per_block; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 319 | |
Steven Whitehouse | 2359125 | 2006-10-13 17:25:45 -0400 | [diff] [blame] | 320 | bh_map.b_size = 1 << ip->i_inode.i_blkbits; |
Bob Peterson | e9e1ef2 | 2007-12-10 14:13:27 -0600 | [diff] [blame] | 321 | error = gfs2_block_map(&ip->i_inode, block, &bh_map, 0); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 322 | if (error) |
| 323 | goto fail; |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 324 | error = gfs2_meta_read(ip->i_gl, bh_map.b_blocknr, DIO_WAIT, &bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 325 | if (error) |
| 326 | goto fail; |
| 327 | error = -EIO; |
| 328 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) |
| 329 | goto fail_brelse; |
| 330 | |
| 331 | qd->qd_bh = bh; |
| 332 | qd->qd_bh_qc = (struct gfs2_quota_change *) |
| 333 | (bh->b_data + sizeof(struct gfs2_meta_header) + |
| 334 | offset * sizeof(struct gfs2_quota_change)); |
| 335 | |
Josef Whiter | 2e95b66 | 2007-02-20 00:03:29 -0500 | [diff] [blame] | 336 | mutex_unlock(&sdp->sd_quota_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 337 | |
| 338 | return 0; |
| 339 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 340 | fail_brelse: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 341 | brelse(bh); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 342 | fail: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 343 | qd->qd_bh_count--; |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 344 | mutex_unlock(&sdp->sd_quota_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 345 | return error; |
| 346 | } |
| 347 | |
| 348 | static void bh_put(struct gfs2_quota_data *qd) |
| 349 | { |
| 350 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
| 351 | |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 352 | mutex_lock(&sdp->sd_quota_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 353 | gfs2_assert(sdp, qd->qd_bh_count); |
| 354 | if (!--qd->qd_bh_count) { |
| 355 | brelse(qd->qd_bh); |
| 356 | qd->qd_bh = NULL; |
| 357 | qd->qd_bh_qc = NULL; |
| 358 | } |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 359 | mutex_unlock(&sdp->sd_quota_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 360 | } |
| 361 | |
| 362 | static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) |
| 363 | { |
| 364 | struct gfs2_quota_data *qd = NULL; |
| 365 | int error; |
| 366 | int found = 0; |
| 367 | |
| 368 | *qdp = NULL; |
| 369 | |
| 370 | if (sdp->sd_vfs->s_flags & MS_RDONLY) |
| 371 | return 0; |
| 372 | |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 373 | spin_lock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 374 | |
| 375 | list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { |
| 376 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || |
| 377 | !test_bit(QDF_CHANGE, &qd->qd_flags) || |
| 378 | qd->qd_sync_gen >= sdp->sd_quota_sync_gen) |
| 379 | continue; |
| 380 | |
| 381 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); |
| 382 | |
| 383 | set_bit(QDF_LOCKED, &qd->qd_flags); |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 384 | gfs2_assert_warn(sdp, atomic_read(&qd->qd_count)); |
| 385 | atomic_inc(&qd->qd_count); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 386 | qd->qd_change_sync = qd->qd_change; |
| 387 | gfs2_assert_warn(sdp, qd->qd_slot_count); |
| 388 | qd->qd_slot_count++; |
| 389 | found = 1; |
| 390 | |
| 391 | break; |
| 392 | } |
| 393 | |
| 394 | if (!found) |
| 395 | qd = NULL; |
| 396 | |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 397 | spin_unlock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 398 | |
| 399 | if (qd) { |
| 400 | gfs2_assert_warn(sdp, qd->qd_change_sync); |
| 401 | error = bh_get(qd); |
| 402 | if (error) { |
| 403 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
| 404 | slot_put(qd); |
| 405 | qd_put(qd); |
| 406 | return error; |
| 407 | } |
| 408 | } |
| 409 | |
| 410 | *qdp = qd; |
| 411 | |
| 412 | return 0; |
| 413 | } |
| 414 | |
| 415 | static int qd_trylock(struct gfs2_quota_data *qd) |
| 416 | { |
| 417 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
| 418 | |
| 419 | if (sdp->sd_vfs->s_flags & MS_RDONLY) |
| 420 | return 0; |
| 421 | |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 422 | spin_lock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 423 | |
| 424 | if (test_bit(QDF_LOCKED, &qd->qd_flags) || |
| 425 | !test_bit(QDF_CHANGE, &qd->qd_flags)) { |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 426 | spin_unlock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 427 | return 0; |
| 428 | } |
| 429 | |
| 430 | list_move_tail(&qd->qd_list, &sdp->sd_quota_list); |
| 431 | |
| 432 | set_bit(QDF_LOCKED, &qd->qd_flags); |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 433 | gfs2_assert_warn(sdp, atomic_read(&qd->qd_count)); |
| 434 | atomic_inc(&qd->qd_count); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 435 | qd->qd_change_sync = qd->qd_change; |
| 436 | gfs2_assert_warn(sdp, qd->qd_slot_count); |
| 437 | qd->qd_slot_count++; |
| 438 | |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 439 | spin_unlock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 440 | |
| 441 | gfs2_assert_warn(sdp, qd->qd_change_sync); |
| 442 | if (bh_get(qd)) { |
| 443 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
| 444 | slot_put(qd); |
| 445 | qd_put(qd); |
| 446 | return 0; |
| 447 | } |
| 448 | |
| 449 | return 1; |
| 450 | } |
| 451 | |
| 452 | static void qd_unlock(struct gfs2_quota_data *qd) |
| 453 | { |
Steven Whitehouse | 568f4c9 | 2006-02-27 12:00:42 -0500 | [diff] [blame] | 454 | gfs2_assert_warn(qd->qd_gl->gl_sbd, |
| 455 | test_bit(QDF_LOCKED, &qd->qd_flags)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 456 | clear_bit(QDF_LOCKED, &qd->qd_flags); |
| 457 | bh_put(qd); |
| 458 | slot_put(qd); |
| 459 | qd_put(qd); |
| 460 | } |
| 461 | |
Eric W. Biederman | b59c8b6 | 2013-01-31 19:35:56 -0800 | [diff] [blame] | 462 | static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 463 | struct gfs2_quota_data **qdp) |
| 464 | { |
| 465 | int error; |
| 466 | |
Eric W. Biederman | 05e0a60 | 2013-01-31 19:52:08 -0800 | [diff] [blame] | 467 | error = qd_get(sdp, qid, qdp); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 468 | if (error) |
| 469 | return error; |
| 470 | |
| 471 | error = slot_get(*qdp); |
| 472 | if (error) |
| 473 | goto fail; |
| 474 | |
| 475 | error = bh_get(*qdp); |
| 476 | if (error) |
| 477 | goto fail_slot; |
| 478 | |
| 479 | return 0; |
| 480 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 481 | fail_slot: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 482 | slot_put(*qdp); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 483 | fail: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 484 | qd_put(*qdp); |
| 485 | return error; |
| 486 | } |
| 487 | |
| 488 | static void qdsb_put(struct gfs2_quota_data *qd) |
| 489 | { |
| 490 | bh_put(qd); |
| 491 | slot_put(qd); |
| 492 | qd_put(qd); |
| 493 | } |
| 494 | |
Eric W. Biederman | 7c06b5d | 2013-01-31 20:27:54 -0800 | [diff] [blame] | 495 | int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 496 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 497 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 498 | struct gfs2_quota_data **qd; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 499 | int error; |
| 500 | |
Andrew Price | aaaf68c | 2012-10-12 16:45:08 +0100 | [diff] [blame] | 501 | if (ip->i_res == NULL) { |
| 502 | error = gfs2_rs_alloc(ip); |
| 503 | if (error) |
| 504 | return error; |
| 505 | } |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 506 | |
| 507 | qd = ip->i_res->rs_qa_qd; |
| 508 | |
| 509 | if (gfs2_assert_warn(sdp, !ip->i_res->rs_qa_qd_num) || |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 510 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) |
| 511 | return -EIO; |
| 512 | |
| 513 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) |
| 514 | return 0; |
| 515 | |
Eric W. Biederman | b59c8b6 | 2013-01-31 19:35:56 -0800 | [diff] [blame] | 516 | error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 517 | if (error) |
| 518 | goto out; |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 519 | ip->i_res->rs_qa_qd_num++; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 520 | qd++; |
| 521 | |
Eric W. Biederman | b59c8b6 | 2013-01-31 19:35:56 -0800 | [diff] [blame] | 522 | error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 523 | if (error) |
| 524 | goto out; |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 525 | ip->i_res->rs_qa_qd_num++; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 526 | qd++; |
| 527 | |
Eric W. Biederman | 6b24c0d | 2013-01-31 21:56:13 -0800 | [diff] [blame] | 528 | if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) && |
| 529 | !uid_eq(uid, ip->i_inode.i_uid)) { |
Eric W. Biederman | b59c8b6 | 2013-01-31 19:35:56 -0800 | [diff] [blame] | 530 | error = qdsb_get(sdp, make_kqid_uid(uid), qd); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 531 | if (error) |
| 532 | goto out; |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 533 | ip->i_res->rs_qa_qd_num++; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 534 | qd++; |
| 535 | } |
| 536 | |
Eric W. Biederman | 6b24c0d | 2013-01-31 21:56:13 -0800 | [diff] [blame] | 537 | if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) && |
| 538 | !gid_eq(gid, ip->i_inode.i_gid)) { |
Eric W. Biederman | b59c8b6 | 2013-01-31 19:35:56 -0800 | [diff] [blame] | 539 | error = qdsb_get(sdp, make_kqid_gid(gid), qd); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 540 | if (error) |
| 541 | goto out; |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 542 | ip->i_res->rs_qa_qd_num++; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 543 | qd++; |
| 544 | } |
| 545 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 546 | out: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 547 | if (error) |
| 548 | gfs2_quota_unhold(ip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 549 | return error; |
| 550 | } |
| 551 | |
| 552 | void gfs2_quota_unhold(struct gfs2_inode *ip) |
| 553 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 554 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 555 | unsigned int x; |
| 556 | |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 557 | if (ip->i_res == NULL) |
| 558 | return; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 559 | gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags)); |
| 560 | |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 561 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
| 562 | qdsb_put(ip->i_res->rs_qa_qd[x]); |
| 563 | ip->i_res->rs_qa_qd[x] = NULL; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 564 | } |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 565 | ip->i_res->rs_qa_qd_num = 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 566 | } |
| 567 | |
| 568 | static int sort_qd(const void *a, const void *b) |
| 569 | { |
Steven Whitehouse | 48fac17 | 2006-09-05 15:17:12 -0400 | [diff] [blame] | 570 | const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a; |
| 571 | const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 572 | |
Eric W. Biederman | 05e0a60 | 2013-01-31 19:52:08 -0800 | [diff] [blame] | 573 | if (qid_lt(qd_a->qd_id, qd_b->qd_id)) |
Steven Whitehouse | 48fac17 | 2006-09-05 15:17:12 -0400 | [diff] [blame] | 574 | return -1; |
Eric W. Biederman | 05e0a60 | 2013-01-31 19:52:08 -0800 | [diff] [blame] | 575 | if (qid_lt(qd_b->qd_id, qd_a->qd_id)) |
Steven Whitehouse | 48fac17 | 2006-09-05 15:17:12 -0400 | [diff] [blame] | 576 | return 1; |
Steven Whitehouse | 48fac17 | 2006-09-05 15:17:12 -0400 | [diff] [blame] | 577 | return 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 578 | } |
| 579 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 580 | static void do_qc(struct gfs2_quota_data *qd, s64 change) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 581 | { |
| 582 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 583 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 584 | struct gfs2_quota_change *qc = qd->qd_bh_qc; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 585 | s64 x; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 586 | |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 587 | mutex_lock(&sdp->sd_quota_mutex); |
Steven Whitehouse | 350a9b0 | 2012-12-14 12:36:02 +0000 | [diff] [blame] | 588 | gfs2_trans_add_meta(ip->i_gl, qd->qd_bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 589 | |
| 590 | if (!test_bit(QDF_CHANGE, &qd->qd_flags)) { |
| 591 | qc->qc_change = 0; |
| 592 | qc->qc_flags = 0; |
Eric W. Biederman | 05e0a60 | 2013-01-31 19:52:08 -0800 | [diff] [blame] | 593 | if (qd->qd_id.type == USRQUOTA) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 594 | qc->qc_flags = cpu_to_be32(GFS2_QCF_USER); |
Eric W. Biederman | 05e0a60 | 2013-01-31 19:52:08 -0800 | [diff] [blame] | 595 | qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 596 | } |
| 597 | |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 598 | x = be64_to_cpu(qc->qc_change) + change; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 599 | qc->qc_change = cpu_to_be64(x); |
| 600 | |
Steven Whitehouse | 22077f5 | 2009-01-08 14:28:42 +0000 | [diff] [blame] | 601 | spin_lock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 602 | qd->qd_change = x; |
Steven Whitehouse | 22077f5 | 2009-01-08 14:28:42 +0000 | [diff] [blame] | 603 | spin_unlock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 604 | |
| 605 | if (!x) { |
| 606 | gfs2_assert_warn(sdp, test_bit(QDF_CHANGE, &qd->qd_flags)); |
| 607 | clear_bit(QDF_CHANGE, &qd->qd_flags); |
| 608 | qc->qc_flags = 0; |
| 609 | qc->qc_id = 0; |
| 610 | slot_put(qd); |
| 611 | qd_put(qd); |
| 612 | } else if (!test_and_set_bit(QDF_CHANGE, &qd->qd_flags)) { |
| 613 | qd_hold(qd); |
| 614 | slot_hold(qd); |
| 615 | } |
Steven Whitehouse | 907b9bc | 2006-09-25 09:26:04 -0400 | [diff] [blame] | 616 | |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 617 | mutex_unlock(&sdp->sd_quota_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 618 | } |
| 619 | |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 620 | /** |
Steven Whitehouse | 1e72c0f | 2009-09-15 20:42:56 +0100 | [diff] [blame] | 621 | * gfs2_adjust_quota - adjust record of current block usage |
| 622 | * @ip: The quota inode |
| 623 | * @loc: Offset of the entry in the quota file |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 624 | * @change: The amount of usage change to record |
Steven Whitehouse | 1e72c0f | 2009-09-15 20:42:56 +0100 | [diff] [blame] | 625 | * @qd: The quota data |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 626 | * @fdq: The updated limits to record |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 627 | * |
| 628 | * This function was mostly borrowed from gfs2_block_truncate_page which was |
| 629 | * in turn mostly borrowed from ext3 |
Steven Whitehouse | 1e72c0f | 2009-09-15 20:42:56 +0100 | [diff] [blame] | 630 | * |
| 631 | * Returns: 0 or -ve on error |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 632 | */ |
Steven Whitehouse | 1e72c0f | 2009-09-15 20:42:56 +0100 | [diff] [blame] | 633 | |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 634 | static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc, |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 635 | s64 change, struct gfs2_quota_data *qd, |
| 636 | struct fs_disk_quota *fdq) |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 637 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 638 | struct inode *inode = &ip->i_inode; |
Abhijith Das | 14870b4 | 2010-11-18 11:24:24 -0500 | [diff] [blame] | 639 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 640 | struct address_space *mapping = inode->i_mapping; |
| 641 | unsigned long index = loc >> PAGE_CACHE_SHIFT; |
Abhijith Das | 1990e91 | 2007-05-31 17:52:02 -0500 | [diff] [blame] | 642 | unsigned offset = loc & (PAGE_CACHE_SIZE - 1); |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 643 | unsigned blocksize, iblock, pos; |
Steven Whitehouse | ab9bbda | 2011-08-15 14:20:36 +0100 | [diff] [blame] | 644 | struct buffer_head *bh; |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 645 | struct page *page; |
Abhijith Das | 7e619bc | 2010-05-07 17:50:18 -0400 | [diff] [blame] | 646 | void *kaddr, *ptr; |
| 647 | struct gfs2_quota q, *qp; |
| 648 | int err, nbytes; |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 649 | u64 size; |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 650 | |
Steven Whitehouse | 891a8e9 | 2011-09-19 10:25:49 +0100 | [diff] [blame] | 651 | if (gfs2_is_stuffed(ip)) { |
| 652 | err = gfs2_unstuff_dinode(ip, NULL); |
| 653 | if (err) |
| 654 | return err; |
| 655 | } |
Abhijith Das | 7e619bc | 2010-05-07 17:50:18 -0400 | [diff] [blame] | 656 | |
| 657 | memset(&q, 0, sizeof(struct gfs2_quota)); |
Andrew Price | 4306629 | 2012-04-16 16:40:55 +0100 | [diff] [blame] | 658 | err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q)); |
Abhijith Das | 7e619bc | 2010-05-07 17:50:18 -0400 | [diff] [blame] | 659 | if (err < 0) |
| 660 | return err; |
| 661 | |
| 662 | err = -EIO; |
| 663 | qp = &q; |
| 664 | qp->qu_value = be64_to_cpu(qp->qu_value); |
| 665 | qp->qu_value += change; |
| 666 | qp->qu_value = cpu_to_be64(qp->qu_value); |
| 667 | qd->qd_qb.qb_value = qp->qu_value; |
| 668 | if (fdq) { |
| 669 | if (fdq->d_fieldmask & FS_DQ_BSOFT) { |
Abhijith Das | 14870b4 | 2010-11-18 11:24:24 -0500 | [diff] [blame] | 670 | qp->qu_warn = cpu_to_be64(fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift); |
Abhijith Das | 7e619bc | 2010-05-07 17:50:18 -0400 | [diff] [blame] | 671 | qd->qd_qb.qb_warn = qp->qu_warn; |
| 672 | } |
| 673 | if (fdq->d_fieldmask & FS_DQ_BHARD) { |
Abhijith Das | 14870b4 | 2010-11-18 11:24:24 -0500 | [diff] [blame] | 674 | qp->qu_limit = cpu_to_be64(fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift); |
Abhijith Das | 7e619bc | 2010-05-07 17:50:18 -0400 | [diff] [blame] | 675 | qd->qd_qb.qb_limit = qp->qu_limit; |
| 676 | } |
Abhijith Das | 802ec9b | 2010-11-18 11:26:46 -0500 | [diff] [blame] | 677 | if (fdq->d_fieldmask & FS_DQ_BCOUNT) { |
| 678 | qp->qu_value = cpu_to_be64(fdq->d_bcount >> sdp->sd_fsb2bb_shift); |
| 679 | qd->qd_qb.qb_value = qp->qu_value; |
| 680 | } |
Abhijith Das | 7e619bc | 2010-05-07 17:50:18 -0400 | [diff] [blame] | 681 | } |
| 682 | |
| 683 | /* Write the quota into the quota file on disk */ |
| 684 | ptr = qp; |
| 685 | nbytes = sizeof(struct gfs2_quota); |
| 686 | get_a_page: |
Bob Peterson | 220cca2 | 2012-03-19 15:25:50 -0400 | [diff] [blame] | 687 | page = find_or_create_page(mapping, index, GFP_NOFS); |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 688 | if (!page) |
| 689 | return -ENOMEM; |
| 690 | |
| 691 | blocksize = inode->i_sb->s_blocksize; |
| 692 | iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits); |
| 693 | |
| 694 | if (!page_has_buffers(page)) |
| 695 | create_empty_buffers(page, blocksize, 0); |
| 696 | |
| 697 | bh = page_buffers(page); |
| 698 | pos = blocksize; |
| 699 | while (offset >= pos) { |
| 700 | bh = bh->b_this_page; |
| 701 | iblock++; |
| 702 | pos += blocksize; |
| 703 | } |
| 704 | |
| 705 | if (!buffer_mapped(bh)) { |
Bob Peterson | e9e1ef2 | 2007-12-10 14:13:27 -0600 | [diff] [blame] | 706 | gfs2_block_map(inode, iblock, bh, 1); |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 707 | if (!buffer_mapped(bh)) |
Abhijith Das | 7e619bc | 2010-05-07 17:50:18 -0400 | [diff] [blame] | 708 | goto unlock_out; |
| 709 | /* If it's a newly allocated disk block for quota, zero it */ |
Abhijith Das | 8b42160 | 2010-07-04 01:33:24 -0400 | [diff] [blame] | 710 | if (buffer_new(bh)) |
| 711 | zero_user(page, pos - blocksize, bh->b_size); |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 712 | } |
| 713 | |
| 714 | if (PageUptodate(page)) |
| 715 | set_buffer_uptodate(bh); |
| 716 | |
| 717 | if (!buffer_uptodate(bh)) { |
Steven Whitehouse | 20ed053 | 2011-10-31 09:52:02 +0000 | [diff] [blame] | 718 | ll_rw_block(READ | REQ_META, 1, &bh); |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 719 | wait_on_buffer(bh); |
| 720 | if (!buffer_uptodate(bh)) |
Abhijith Das | 7e619bc | 2010-05-07 17:50:18 -0400 | [diff] [blame] | 721 | goto unlock_out; |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 722 | } |
| 723 | |
Bob Peterson | 37f7157 | 2013-05-10 11:59:18 -0400 | [diff] [blame] | 724 | gfs2_trans_add_data(ip->i_gl, bh); |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 725 | |
Cong Wang | d934928 | 2011-11-25 23:14:30 +0800 | [diff] [blame] | 726 | kaddr = kmap_atomic(page); |
Abhijith Das | 7e619bc | 2010-05-07 17:50:18 -0400 | [diff] [blame] | 727 | if (offset + sizeof(struct gfs2_quota) > PAGE_CACHE_SIZE) |
| 728 | nbytes = PAGE_CACHE_SIZE - offset; |
| 729 | memcpy(kaddr + offset, ptr, nbytes); |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 730 | flush_dcache_page(page); |
Cong Wang | d934928 | 2011-11-25 23:14:30 +0800 | [diff] [blame] | 731 | kunmap_atomic(kaddr); |
Abhijith Das | 7e619bc | 2010-05-07 17:50:18 -0400 | [diff] [blame] | 732 | unlock_page(page); |
| 733 | page_cache_release(page); |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 734 | |
Abhijith Das | 7e619bc | 2010-05-07 17:50:18 -0400 | [diff] [blame] | 735 | /* If quota straddles page boundary, we need to update the rest of the |
| 736 | * quota at the beginning of the next page */ |
Abhijith Das | 8b42160 | 2010-07-04 01:33:24 -0400 | [diff] [blame] | 737 | if ((offset + sizeof(struct gfs2_quota)) > PAGE_CACHE_SIZE) { |
Abhijith Das | 7e619bc | 2010-05-07 17:50:18 -0400 | [diff] [blame] | 738 | ptr = ptr + nbytes; |
| 739 | nbytes = sizeof(struct gfs2_quota) - nbytes; |
| 740 | offset = 0; |
| 741 | index++; |
| 742 | goto get_a_page; |
| 743 | } |
| 744 | |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 745 | size = loc + sizeof(struct gfs2_quota); |
Steven Whitehouse | a2e0f79 | 2010-08-11 09:53:11 +0100 | [diff] [blame] | 746 | if (size > inode->i_size) |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 747 | i_size_write(inode, size); |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 748 | inode->i_mtime = inode->i_atime = CURRENT_TIME; |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 749 | mark_inode_dirty(inode); |
Bob Peterson | 500242a | 2012-05-15 14:51:54 -0400 | [diff] [blame] | 750 | return 0; |
Steven Whitehouse | ab9bbda | 2011-08-15 14:20:36 +0100 | [diff] [blame] | 751 | |
Abhijith Das | 7e619bc | 2010-05-07 17:50:18 -0400 | [diff] [blame] | 752 | unlock_out: |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 753 | unlock_page(page); |
| 754 | page_cache_release(page); |
| 755 | return err; |
| 756 | } |
| 757 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 758 | static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda) |
| 759 | { |
| 760 | struct gfs2_sbd *sdp = (*qda)->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 | unsigned int data_blocks, ind_blocks; |
| 763 | struct gfs2_holder *ghs, i_gh; |
| 764 | unsigned int qx, x; |
| 765 | struct gfs2_quota_data *qd; |
Steven Whitehouse | 71f890f | 2012-07-30 14:53:19 +0100 | [diff] [blame] | 766 | unsigned reserved; |
Steven Whitehouse | f42faf4 | 2006-01-30 18:34:10 +0000 | [diff] [blame] | 767 | loff_t offset; |
Abhijith Das | 20b95bf | 2008-03-06 17:43:52 -0600 | [diff] [blame] | 768 | unsigned int nalloc = 0, blocks; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 769 | int error; |
| 770 | |
Bob Peterson | 0a305e4 | 2012-06-06 11:17:59 +0100 | [diff] [blame] | 771 | error = gfs2_rs_alloc(ip); |
| 772 | if (error) |
| 773 | return error; |
| 774 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 775 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
| 776 | &data_blocks, &ind_blocks); |
| 777 | |
Josef Bacik | 16c5f06 | 2008-04-09 09:33:41 -0400 | [diff] [blame] | 778 | ghs = kcalloc(num_qd, sizeof(struct gfs2_holder), GFP_NOFS); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 779 | if (!ghs) |
| 780 | return -ENOMEM; |
| 781 | |
| 782 | sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL); |
Jan Kara | 56aa72d | 2012-09-05 16:55:11 -0400 | [diff] [blame] | 783 | mutex_lock(&ip->i_inode.i_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 784 | for (qx = 0; qx < num_qd; qx++) { |
Steven Whitehouse | 1e72c0f | 2009-09-15 20:42:56 +0100 | [diff] [blame] | 785 | error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 786 | GL_NOCACHE, &ghs[qx]); |
| 787 | if (error) |
| 788 | goto out; |
| 789 | } |
| 790 | |
| 791 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
| 792 | if (error) |
| 793 | goto out; |
| 794 | |
| 795 | for (x = 0; x < num_qd; x++) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 796 | offset = qd2offset(qda[x]); |
Bob Peterson | 461cb41 | 2010-06-24 19:21:20 -0400 | [diff] [blame] | 797 | if (gfs2_write_alloc_required(ip, offset, |
| 798 | sizeof(struct gfs2_quota))) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 799 | nalloc++; |
| 800 | } |
| 801 | |
Abhijith Das | 20b95bf | 2008-03-06 17:43:52 -0600 | [diff] [blame] | 802 | /* |
| 803 | * 1 blk for unstuffing inode if stuffed. We add this extra |
| 804 | * block to the reservation unconditionally. If the inode |
| 805 | * doesn't need unstuffing, the block will be released to the |
| 806 | * rgrp since it won't be allocated during the transaction |
| 807 | */ |
Abhijith Das | 7e619bc | 2010-05-07 17:50:18 -0400 | [diff] [blame] | 808 | /* +3 in the end for unstuffing block, inode size update block |
| 809 | * and another block in case quota straddles page boundary and |
| 810 | * two blocks need to be updated instead of 1 */ |
| 811 | blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3; |
Abhijith Das | 20b95bf | 2008-03-06 17:43:52 -0600 | [diff] [blame] | 812 | |
Steven Whitehouse | 71f890f | 2012-07-30 14:53:19 +0100 | [diff] [blame] | 813 | reserved = 1 + (nalloc * (data_blocks + ind_blocks)); |
Steven Whitehouse | 9dbe961 | 2012-10-31 10:37:10 +0000 | [diff] [blame] | 814 | error = gfs2_inplace_reserve(ip, reserved, 0); |
Abhijith Das | 20b95bf | 2008-03-06 17:43:52 -0600 | [diff] [blame] | 815 | if (error) |
| 816 | goto out_alloc; |
| 817 | |
| 818 | if (nalloc) |
Steven Whitehouse | 71f890f | 2012-07-30 14:53:19 +0100 | [diff] [blame] | 819 | blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS; |
Abhijith Das | 20b95bf | 2008-03-06 17:43:52 -0600 | [diff] [blame] | 820 | |
| 821 | error = gfs2_trans_begin(sdp, blocks, 0); |
| 822 | if (error) |
| 823 | goto out_ipres; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 824 | |
| 825 | for (x = 0; x < num_qd; x++) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 826 | qd = qda[x]; |
| 827 | offset = qd2offset(qd); |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 828 | error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL); |
Steven Whitehouse | 18ec7d5 | 2006-02-08 11:50:51 +0000 | [diff] [blame] | 829 | if (error) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 830 | goto out_end_trans; |
| 831 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 832 | do_qc(qd, -qd->qd_change_sync); |
Abhijith Das | 662e3a5 | 2011-03-08 10:40:42 -0500 | [diff] [blame] | 833 | set_bit(QDF_REFRESH, &qd->qd_flags); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 834 | } |
| 835 | |
| 836 | error = 0; |
| 837 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 838 | out_end_trans: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 839 | gfs2_trans_end(sdp); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 840 | out_ipres: |
Abhijith Das | 20b95bf | 2008-03-06 17:43:52 -0600 | [diff] [blame] | 841 | gfs2_inplace_release(ip); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 842 | out_alloc: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 843 | gfs2_glock_dq_uninit(&i_gh); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 844 | out: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 845 | while (qx--) |
| 846 | gfs2_glock_dq_uninit(&ghs[qx]); |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 847 | mutex_unlock(&ip->i_inode.i_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 848 | kfree(ghs); |
Steven Whitehouse | b09e593 | 2006-04-07 11:17:32 -0400 | [diff] [blame] | 849 | gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 850 | return error; |
| 851 | } |
| 852 | |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 853 | static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd) |
| 854 | { |
| 855 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
| 856 | struct gfs2_quota q; |
| 857 | struct gfs2_quota_lvb *qlvb; |
| 858 | loff_t pos; |
| 859 | int error; |
| 860 | |
| 861 | memset(&q, 0, sizeof(struct gfs2_quota)); |
| 862 | pos = qd2offset(qd); |
Andrew Price | 4306629 | 2012-04-16 16:40:55 +0100 | [diff] [blame] | 863 | error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q)); |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 864 | if (error < 0) |
| 865 | return error; |
| 866 | |
David Teigland | 4e2f884 | 2012-11-14 13:47:37 -0500 | [diff] [blame] | 867 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 868 | qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC); |
| 869 | qlvb->__pad = 0; |
| 870 | qlvb->qb_limit = q.qu_limit; |
| 871 | qlvb->qb_warn = q.qu_warn; |
| 872 | qlvb->qb_value = q.qu_value; |
| 873 | qd->qd_qb = *qlvb; |
| 874 | |
| 875 | return 0; |
| 876 | } |
| 877 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 878 | static int do_glock(struct gfs2_quota_data *qd, int force_refresh, |
| 879 | struct gfs2_holder *q_gh) |
| 880 | { |
| 881 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 882 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 883 | struct gfs2_holder i_gh; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 884 | int error; |
| 885 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 886 | restart: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 887 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh); |
| 888 | if (error) |
| 889 | return error; |
| 890 | |
David Teigland | 4e2f884 | 2012-11-14 13:47:37 -0500 | [diff] [blame] | 891 | qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 892 | |
Steven Whitehouse | e9fc2aa | 2006-09-01 11:05:15 -0400 | [diff] [blame] | 893 | if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 894 | gfs2_glock_dq_uninit(q_gh); |
Steven Whitehouse | 91094d0 | 2009-09-11 15:21:56 +0100 | [diff] [blame] | 895 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, |
| 896 | GL_NOCACHE, q_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 897 | if (error) |
| 898 | return error; |
| 899 | |
Steven Whitehouse | e9fc2aa | 2006-09-01 11:05:15 -0400 | [diff] [blame] | 900 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 901 | if (error) |
| 902 | goto fail; |
| 903 | |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 904 | error = update_qd(sdp, qd); |
| 905 | if (error) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 906 | goto fail_gunlock; |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 907 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 908 | gfs2_glock_dq_uninit(&i_gh); |
Steven Whitehouse | 91094d0 | 2009-09-11 15:21:56 +0100 | [diff] [blame] | 909 | gfs2_glock_dq_uninit(q_gh); |
| 910 | force_refresh = 0; |
| 911 | goto restart; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 912 | } |
| 913 | |
| 914 | return 0; |
| 915 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 916 | fail_gunlock: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 917 | gfs2_glock_dq_uninit(&i_gh); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 918 | fail: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 919 | gfs2_glock_dq_uninit(q_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 920 | return error; |
| 921 | } |
| 922 | |
Eric W. Biederman | 7c06b5d | 2013-01-31 20:27:54 -0800 | [diff] [blame] | 923 | int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 924 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 925 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
Abhijith Das | 662e3a5 | 2011-03-08 10:40:42 -0500 | [diff] [blame] | 926 | struct gfs2_quota_data *qd; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 927 | unsigned int x; |
| 928 | int error = 0; |
| 929 | |
Steven Whitehouse | 891a8e9 | 2011-09-19 10:25:49 +0100 | [diff] [blame] | 930 | error = gfs2_quota_hold(ip, uid, gid); |
| 931 | if (error) |
| 932 | return error; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 933 | |
| 934 | if (capable(CAP_SYS_RESOURCE) || |
| 935 | sdp->sd_args.ar_quota != GFS2_QUOTA_ON) |
| 936 | return 0; |
| 937 | |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 938 | sort(ip->i_res->rs_qa_qd, ip->i_res->rs_qa_qd_num, |
| 939 | sizeof(struct gfs2_quota_data *), sort_qd, NULL); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 940 | |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 941 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
Abhijith Das | 662e3a5 | 2011-03-08 10:40:42 -0500 | [diff] [blame] | 942 | int force = NO_FORCE; |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 943 | qd = ip->i_res->rs_qa_qd[x]; |
Abhijith Das | 662e3a5 | 2011-03-08 10:40:42 -0500 | [diff] [blame] | 944 | if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags)) |
| 945 | force = FORCE; |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 946 | error = do_glock(qd, force, &ip->i_res->rs_qa_qd_ghs[x]); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 947 | if (error) |
| 948 | break; |
| 949 | } |
| 950 | |
| 951 | if (!error) |
| 952 | set_bit(GIF_QD_LOCKED, &ip->i_flags); |
| 953 | else { |
| 954 | while (x--) |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 955 | gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 956 | gfs2_quota_unhold(ip); |
| 957 | } |
| 958 | |
| 959 | return error; |
| 960 | } |
| 961 | |
| 962 | static int need_sync(struct gfs2_quota_data *qd) |
| 963 | { |
| 964 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
| 965 | struct gfs2_tune *gt = &sdp->sd_tune; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 966 | s64 value; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 967 | unsigned int num, den; |
| 968 | int do_sync = 1; |
| 969 | |
| 970 | if (!qd->qd_qb.qb_limit) |
| 971 | return 0; |
| 972 | |
Steven Whitehouse | 22077f5 | 2009-01-08 14:28:42 +0000 | [diff] [blame] | 973 | spin_lock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 974 | value = qd->qd_change; |
Steven Whitehouse | 22077f5 | 2009-01-08 14:28:42 +0000 | [diff] [blame] | 975 | spin_unlock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 976 | |
| 977 | spin_lock(>->gt_spin); |
| 978 | num = gt->gt_quota_scale_num; |
| 979 | den = gt->gt_quota_scale_den; |
| 980 | spin_unlock(>->gt_spin); |
| 981 | |
| 982 | if (value < 0) |
| 983 | do_sync = 0; |
Steven Whitehouse | e9fc2aa | 2006-09-01 11:05:15 -0400 | [diff] [blame] | 984 | else if ((s64)be64_to_cpu(qd->qd_qb.qb_value) >= |
| 985 | (s64)be64_to_cpu(qd->qd_qb.qb_limit)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 986 | do_sync = 0; |
| 987 | else { |
| 988 | value *= gfs2_jindex_size(sdp) * num; |
David Howells | 4abaca17 | 2008-07-11 14:39:56 +0100 | [diff] [blame] | 989 | value = div_s64(value, den); |
Steven Whitehouse | e9fc2aa | 2006-09-01 11:05:15 -0400 | [diff] [blame] | 990 | value += (s64)be64_to_cpu(qd->qd_qb.qb_value); |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 991 | if (value < (s64)be64_to_cpu(qd->qd_qb.qb_limit)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 992 | do_sync = 0; |
| 993 | } |
| 994 | |
| 995 | return do_sync; |
| 996 | } |
| 997 | |
| 998 | void gfs2_quota_unlock(struct gfs2_inode *ip) |
| 999 | { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1000 | struct gfs2_quota_data *qda[4]; |
| 1001 | unsigned int count = 0; |
| 1002 | unsigned int x; |
| 1003 | |
| 1004 | if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags)) |
| 1005 | goto out; |
| 1006 | |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 1007 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1008 | struct gfs2_quota_data *qd; |
| 1009 | int sync; |
| 1010 | |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 1011 | qd = ip->i_res->rs_qa_qd[x]; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1012 | sync = need_sync(qd); |
| 1013 | |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 1014 | gfs2_glock_dq_uninit(&ip->i_res->rs_qa_qd_ghs[x]); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1015 | |
| 1016 | if (sync && qd_trylock(qd)) |
| 1017 | qda[count++] = qd; |
| 1018 | } |
| 1019 | |
| 1020 | if (count) { |
| 1021 | do_sync(count, qda); |
| 1022 | for (x = 0; x < count; x++) |
| 1023 | qd_unlock(qda[x]); |
| 1024 | } |
| 1025 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 1026 | out: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1027 | gfs2_quota_unhold(ip); |
| 1028 | } |
| 1029 | |
| 1030 | #define MAX_LINE 256 |
| 1031 | |
| 1032 | static int print_message(struct gfs2_quota_data *qd, char *type) |
| 1033 | { |
| 1034 | struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1035 | |
Steven Whitehouse | 2ec4650 | 2009-09-28 12:49:15 +0100 | [diff] [blame] | 1036 | printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\n", |
Steven Whitehouse | 02630a1 | 2006-07-03 11:20:06 -0400 | [diff] [blame] | 1037 | sdp->sd_fsname, type, |
Eric W. Biederman | 05e0a60 | 2013-01-31 19:52:08 -0800 | [diff] [blame] | 1038 | (qd->qd_id.type == USRQUOTA) ? "user" : "group", |
| 1039 | from_kqid(&init_user_ns, qd->qd_id)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1040 | |
| 1041 | return 0; |
| 1042 | } |
| 1043 | |
Eric W. Biederman | 7c06b5d | 2013-01-31 20:27:54 -0800 | [diff] [blame] | 1044 | int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1045 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1046 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1047 | struct gfs2_quota_data *qd; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 1048 | s64 value; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1049 | unsigned int x; |
| 1050 | int error = 0; |
| 1051 | |
| 1052 | if (!test_bit(GIF_QD_LOCKED, &ip->i_flags)) |
| 1053 | return 0; |
| 1054 | |
| 1055 | if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON) |
| 1056 | return 0; |
| 1057 | |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 1058 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
| 1059 | qd = ip->i_res->rs_qa_qd[x]; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1060 | |
Eric W. Biederman | 05e0a60 | 2013-01-31 19:52:08 -0800 | [diff] [blame] | 1061 | if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
| 1062 | qid_eq(qd->qd_id, make_kqid_gid(gid)))) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1063 | continue; |
| 1064 | |
Steven Whitehouse | e9fc2aa | 2006-09-01 11:05:15 -0400 | [diff] [blame] | 1065 | value = (s64)be64_to_cpu(qd->qd_qb.qb_value); |
Steven Whitehouse | 22077f5 | 2009-01-08 14:28:42 +0000 | [diff] [blame] | 1066 | spin_lock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1067 | value += qd->qd_change; |
Steven Whitehouse | 22077f5 | 2009-01-08 14:28:42 +0000 | [diff] [blame] | 1068 | spin_unlock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1069 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 1070 | if (be64_to_cpu(qd->qd_qb.qb_limit) && (s64)be64_to_cpu(qd->qd_qb.qb_limit) < value) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1071 | print_message(qd, "exceeded"); |
Eric W. Biederman | 05e0a60 | 2013-01-31 19:52:08 -0800 | [diff] [blame] | 1072 | quota_send_warning(qd->qd_id, |
Steven Whitehouse | 2ec4650 | 2009-09-28 12:49:15 +0100 | [diff] [blame] | 1073 | sdp->sd_vfs->s_dev, QUOTA_NL_BHARDWARN); |
| 1074 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1075 | error = -EDQUOT; |
| 1076 | break; |
Steven Whitehouse | e9fc2aa | 2006-09-01 11:05:15 -0400 | [diff] [blame] | 1077 | } else if (be64_to_cpu(qd->qd_qb.qb_warn) && |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 1078 | (s64)be64_to_cpu(qd->qd_qb.qb_warn) < value && |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1079 | time_after_eq(jiffies, qd->qd_last_warn + |
Steven Whitehouse | 568f4c9 | 2006-02-27 12:00:42 -0500 | [diff] [blame] | 1080 | gfs2_tune_get(sdp, |
| 1081 | gt_quota_warn_period) * HZ)) { |
Eric W. Biederman | 05e0a60 | 2013-01-31 19:52:08 -0800 | [diff] [blame] | 1082 | quota_send_warning(qd->qd_id, |
Steven Whitehouse | 2ec4650 | 2009-09-28 12:49:15 +0100 | [diff] [blame] | 1083 | sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1084 | error = print_message(qd, "warning"); |
| 1085 | qd->qd_last_warn = jiffies; |
| 1086 | } |
| 1087 | } |
| 1088 | |
| 1089 | return error; |
| 1090 | } |
| 1091 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 1092 | void gfs2_quota_change(struct gfs2_inode *ip, s64 change, |
Eric W. Biederman | 7c06b5d | 2013-01-31 20:27:54 -0800 | [diff] [blame] | 1093 | kuid_t uid, kgid_t gid) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1094 | { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1095 | struct gfs2_quota_data *qd; |
| 1096 | unsigned int x; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1097 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1098 | if (gfs2_assert_warn(GFS2_SB(&ip->i_inode), change)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1099 | return; |
Steven Whitehouse | 383f01f | 2008-11-04 10:05:22 +0000 | [diff] [blame] | 1100 | if (ip->i_diskflags & GFS2_DIF_SYSTEM) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1101 | return; |
| 1102 | |
Bob Peterson | 5407e24 | 2012-05-18 09:28:23 -0400 | [diff] [blame] | 1103 | for (x = 0; x < ip->i_res->rs_qa_qd_num; x++) { |
| 1104 | qd = ip->i_res->rs_qa_qd[x]; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1105 | |
Eric W. Biederman | 05e0a60 | 2013-01-31 19:52:08 -0800 | [diff] [blame] | 1106 | if (qid_eq(qd->qd_id, make_kqid_uid(uid)) || |
| 1107 | qid_eq(qd->qd_id, make_kqid_gid(gid))) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1108 | do_qc(qd, change); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1109 | } |
| 1110 | } |
| 1111 | } |
| 1112 | |
Jan Kara | ceed172 | 2012-07-03 16:45:28 +0200 | [diff] [blame] | 1113 | int gfs2_quota_sync(struct super_block *sb, int type) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1114 | { |
Steven Whitehouse | 8c42d63 | 2009-09-11 14:36:44 +0100 | [diff] [blame] | 1115 | struct gfs2_sbd *sdp = sb->s_fs_info; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1116 | struct gfs2_quota_data **qda; |
| 1117 | unsigned int max_qd = gfs2_tune_get(sdp, gt_quota_simul_sync); |
| 1118 | unsigned int num_qd; |
| 1119 | unsigned int x; |
| 1120 | int error = 0; |
| 1121 | |
| 1122 | sdp->sd_quota_sync_gen++; |
| 1123 | |
| 1124 | qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL); |
| 1125 | if (!qda) |
| 1126 | return -ENOMEM; |
| 1127 | |
| 1128 | do { |
| 1129 | num_qd = 0; |
| 1130 | |
| 1131 | for (;;) { |
| 1132 | error = qd_fish(sdp, qda + num_qd); |
| 1133 | if (error || !qda[num_qd]) |
| 1134 | break; |
| 1135 | if (++num_qd == max_qd) |
| 1136 | break; |
| 1137 | } |
| 1138 | |
| 1139 | if (num_qd) { |
| 1140 | if (!error) |
| 1141 | error = do_sync(num_qd, qda); |
| 1142 | if (!error) |
| 1143 | for (x = 0; x < num_qd; x++) |
| 1144 | qda[x]->qd_sync_gen = |
| 1145 | sdp->sd_quota_sync_gen; |
| 1146 | |
| 1147 | for (x = 0; x < num_qd; x++) |
| 1148 | qd_unlock(qda[x]); |
| 1149 | } |
| 1150 | } while (!error && num_qd == max_qd); |
| 1151 | |
| 1152 | kfree(qda); |
| 1153 | |
| 1154 | return error; |
| 1155 | } |
| 1156 | |
Christoph Hellwig | 5fb324a | 2010-02-16 03:44:52 -0500 | [diff] [blame] | 1157 | static int gfs2_quota_sync_timeo(struct super_block *sb, int type) |
| 1158 | { |
Jan Kara | ceed172 | 2012-07-03 16:45:28 +0200 | [diff] [blame] | 1159 | return gfs2_quota_sync(sb, type); |
Christoph Hellwig | 5fb324a | 2010-02-16 03:44:52 -0500 | [diff] [blame] | 1160 | } |
| 1161 | |
Eric W. Biederman | ed87dab | 2013-01-31 19:42:40 -0800 | [diff] [blame] | 1162 | int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1163 | { |
| 1164 | struct gfs2_quota_data *qd; |
| 1165 | struct gfs2_holder q_gh; |
| 1166 | int error; |
| 1167 | |
Eric W. Biederman | 05e0a60 | 2013-01-31 19:52:08 -0800 | [diff] [blame] | 1168 | error = qd_get(sdp, qid, &qd); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1169 | if (error) |
| 1170 | return error; |
| 1171 | |
| 1172 | error = do_glock(qd, FORCE, &q_gh); |
| 1173 | if (!error) |
| 1174 | gfs2_glock_dq_uninit(&q_gh); |
| 1175 | |
| 1176 | qd_put(qd); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1177 | return error; |
| 1178 | } |
| 1179 | |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 1180 | static void gfs2_quota_change_in(struct gfs2_quota_change_host *qc, const void *buf) |
| 1181 | { |
| 1182 | const struct gfs2_quota_change *str = buf; |
| 1183 | |
| 1184 | qc->qc_change = be64_to_cpu(str->qc_change); |
| 1185 | qc->qc_flags = be32_to_cpu(str->qc_flags); |
Eric W. Biederman | e08d8d7 | 2013-01-31 19:25:50 -0800 | [diff] [blame] | 1186 | qc->qc_id = make_kqid(&init_user_ns, |
| 1187 | (qc->qc_flags & GFS2_QCF_USER)?USRQUOTA:GRPQUOTA, |
| 1188 | be32_to_cpu(str->qc_id)); |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 1189 | } |
| 1190 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1191 | int gfs2_quota_init(struct gfs2_sbd *sdp) |
| 1192 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1193 | struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode); |
Steven Whitehouse | a2e0f79 | 2010-08-11 09:53:11 +0100 | [diff] [blame] | 1194 | u64 size = i_size_read(sdp->sd_qc_inode); |
| 1195 | unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1196 | unsigned int x, slot = 0; |
| 1197 | unsigned int found = 0; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 1198 | u64 dblock; |
| 1199 | u32 extlen = 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1200 | int error; |
| 1201 | |
Steven Whitehouse | a2e0f79 | 2010-08-11 09:53:11 +0100 | [diff] [blame] | 1202 | if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20)) |
Steven Whitehouse | 907b9bc | 2006-09-25 09:26:04 -0400 | [diff] [blame] | 1203 | return -EIO; |
Steven Whitehouse | a2e0f79 | 2010-08-11 09:53:11 +0100 | [diff] [blame] | 1204 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1205 | sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block; |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 1206 | 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] | 1207 | |
| 1208 | error = -ENOMEM; |
| 1209 | |
| 1210 | sdp->sd_quota_bitmap = kcalloc(sdp->sd_quota_chunks, |
Josef Bacik | 16c5f06 | 2008-04-09 09:33:41 -0400 | [diff] [blame] | 1211 | sizeof(unsigned char *), GFP_NOFS); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1212 | if (!sdp->sd_quota_bitmap) |
| 1213 | return error; |
| 1214 | |
| 1215 | for (x = 0; x < sdp->sd_quota_chunks; x++) { |
Josef Bacik | 16c5f06 | 2008-04-09 09:33:41 -0400 | [diff] [blame] | 1216 | sdp->sd_quota_bitmap[x] = kzalloc(PAGE_SIZE, GFP_NOFS); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1217 | if (!sdp->sd_quota_bitmap[x]) |
| 1218 | goto fail; |
| 1219 | } |
| 1220 | |
| 1221 | for (x = 0; x < blocks; x++) { |
| 1222 | struct buffer_head *bh; |
| 1223 | unsigned int y; |
| 1224 | |
| 1225 | if (!extlen) { |
| 1226 | int new = 0; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1227 | error = gfs2_extent_map(&ip->i_inode, x, &new, &dblock, &extlen); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1228 | if (error) |
| 1229 | goto fail; |
| 1230 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1231 | error = -EIO; |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 1232 | bh = gfs2_meta_ra(ip->i_gl, dblock, extlen); |
| 1233 | if (!bh) |
| 1234 | goto fail; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1235 | if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC)) { |
| 1236 | brelse(bh); |
| 1237 | goto fail; |
| 1238 | } |
| 1239 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 1240 | for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1241 | y++, slot++) { |
Al Viro | b62f963 | 2006-10-13 23:46:46 -0400 | [diff] [blame] | 1242 | struct gfs2_quota_change_host qc; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1243 | struct gfs2_quota_data *qd; |
| 1244 | |
| 1245 | gfs2_quota_change_in(&qc, bh->b_data + |
| 1246 | sizeof(struct gfs2_meta_header) + |
| 1247 | y * sizeof(struct gfs2_quota_change)); |
| 1248 | if (!qc.qc_change) |
| 1249 | continue; |
| 1250 | |
Eric W. Biederman | 05e0a60 | 2013-01-31 19:52:08 -0800 | [diff] [blame] | 1251 | error = qd_alloc(sdp, qc.qc_id, &qd); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1252 | if (error) { |
| 1253 | brelse(bh); |
| 1254 | goto fail; |
| 1255 | } |
| 1256 | |
| 1257 | set_bit(QDF_CHANGE, &qd->qd_flags); |
| 1258 | qd->qd_change = qc.qc_change; |
| 1259 | qd->qd_slot = slot; |
| 1260 | qd->qd_slot_count = 1; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1261 | |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 1262 | spin_lock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1263 | gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, slot, 1); |
| 1264 | list_add(&qd->qd_list, &sdp->sd_quota_list); |
| 1265 | atomic_inc(&sdp->sd_quota_count); |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 1266 | spin_unlock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1267 | |
| 1268 | found++; |
| 1269 | } |
| 1270 | |
| 1271 | brelse(bh); |
| 1272 | dblock++; |
| 1273 | extlen--; |
| 1274 | } |
| 1275 | |
| 1276 | if (found) |
| 1277 | fs_info(sdp, "found %u quota changes\n", found); |
| 1278 | |
| 1279 | return 0; |
| 1280 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 1281 | fail: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1282 | gfs2_quota_cleanup(sdp); |
| 1283 | return error; |
| 1284 | } |
| 1285 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1286 | void gfs2_quota_cleanup(struct gfs2_sbd *sdp) |
| 1287 | { |
| 1288 | struct list_head *head = &sdp->sd_quota_list; |
| 1289 | struct gfs2_quota_data *qd; |
| 1290 | unsigned int x; |
| 1291 | |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 1292 | spin_lock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1293 | while (!list_empty(head)) { |
| 1294 | qd = list_entry(head->prev, struct gfs2_quota_data, qd_list); |
| 1295 | |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 1296 | if (atomic_read(&qd->qd_count) > 1 || |
| 1297 | (atomic_read(&qd->qd_count) && |
| 1298 | !test_bit(QDF_CHANGE, &qd->qd_flags))) { |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 1299 | list_move(&qd->qd_list, head); |
| 1300 | spin_unlock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1301 | schedule(); |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 1302 | spin_lock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1303 | continue; |
| 1304 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1305 | |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 1306 | list_del(&qd->qd_list); |
| 1307 | /* Also remove if this qd exists in the reclaim list */ |
| 1308 | if (!list_empty(&qd->qd_reclaim)) { |
| 1309 | list_del_init(&qd->qd_reclaim); |
| 1310 | atomic_dec(&qd_lru_count); |
| 1311 | } |
| 1312 | atomic_dec(&sdp->sd_quota_count); |
| 1313 | spin_unlock(&qd_lru_lock); |
| 1314 | |
| 1315 | if (!atomic_read(&qd->qd_count)) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1316 | gfs2_assert_warn(sdp, !qd->qd_change); |
| 1317 | gfs2_assert_warn(sdp, !qd->qd_slot_count); |
| 1318 | } else |
| 1319 | gfs2_assert_warn(sdp, qd->qd_slot_count == 1); |
| 1320 | gfs2_assert_warn(sdp, !qd->qd_bh_count); |
| 1321 | |
Steven Whitehouse | f057f6c | 2009-01-12 10:43:39 +0000 | [diff] [blame] | 1322 | gfs2_glock_put(qd->qd_gl); |
Steven Whitehouse | 37b2c83 | 2008-11-17 14:25:37 +0000 | [diff] [blame] | 1323 | kmem_cache_free(gfs2_quotad_cachep, qd); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1324 | |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 1325 | spin_lock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1326 | } |
Abhijith Das | 0a7ab79 | 2009-01-07 16:03:37 -0600 | [diff] [blame] | 1327 | spin_unlock(&qd_lru_lock); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1328 | |
| 1329 | gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count)); |
| 1330 | |
| 1331 | if (sdp->sd_quota_bitmap) { |
| 1332 | for (x = 0; x < sdp->sd_quota_chunks; x++) |
| 1333 | kfree(sdp->sd_quota_bitmap[x]); |
| 1334 | kfree(sdp->sd_quota_bitmap); |
| 1335 | } |
| 1336 | } |
| 1337 | |
Steven Whitehouse | 37b2c83 | 2008-11-17 14:25:37 +0000 | [diff] [blame] | 1338 | static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error) |
| 1339 | { |
| 1340 | if (error == 0 || error == -EROFS) |
| 1341 | return; |
| 1342 | if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) |
| 1343 | fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error); |
| 1344 | } |
| 1345 | |
| 1346 | static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg, |
Steven Whitehouse | 8c42d63 | 2009-09-11 14:36:44 +0100 | [diff] [blame] | 1347 | int (*fxn)(struct super_block *sb, int type), |
Steven Whitehouse | 37b2c83 | 2008-11-17 14:25:37 +0000 | [diff] [blame] | 1348 | unsigned long t, unsigned long *timeo, |
| 1349 | unsigned int *new_timeo) |
| 1350 | { |
| 1351 | if (t >= *timeo) { |
Steven Whitehouse | 8c42d63 | 2009-09-11 14:36:44 +0100 | [diff] [blame] | 1352 | int error = fxn(sdp->sd_vfs, 0); |
Steven Whitehouse | 37b2c83 | 2008-11-17 14:25:37 +0000 | [diff] [blame] | 1353 | quotad_error(sdp, msg, error); |
| 1354 | *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ; |
| 1355 | } else { |
| 1356 | *timeo -= t; |
| 1357 | } |
| 1358 | } |
| 1359 | |
Steven Whitehouse | 813e0c4 | 2008-11-18 13:38:48 +0000 | [diff] [blame] | 1360 | static void quotad_check_trunc_list(struct gfs2_sbd *sdp) |
| 1361 | { |
| 1362 | struct gfs2_inode *ip; |
| 1363 | |
| 1364 | while(1) { |
| 1365 | ip = NULL; |
| 1366 | spin_lock(&sdp->sd_trunc_lock); |
| 1367 | if (!list_empty(&sdp->sd_trunc_list)) { |
| 1368 | ip = list_entry(sdp->sd_trunc_list.next, |
| 1369 | struct gfs2_inode, i_trunc_list); |
| 1370 | list_del_init(&ip->i_trunc_list); |
| 1371 | } |
| 1372 | spin_unlock(&sdp->sd_trunc_lock); |
| 1373 | if (ip == NULL) |
| 1374 | return; |
| 1375 | gfs2_glock_finish_truncate(ip); |
| 1376 | } |
| 1377 | } |
| 1378 | |
Benjamin Marzinski | 3d3c10f | 2009-10-20 02:39:44 -0500 | [diff] [blame] | 1379 | void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) { |
| 1380 | if (!sdp->sd_statfs_force_sync) { |
| 1381 | sdp->sd_statfs_force_sync = 1; |
| 1382 | wake_up(&sdp->sd_quota_wait); |
| 1383 | } |
| 1384 | } |
| 1385 | |
| 1386 | |
Steven Whitehouse | 37b2c83 | 2008-11-17 14:25:37 +0000 | [diff] [blame] | 1387 | /** |
| 1388 | * gfs2_quotad - Write cached quota changes into the quota file |
| 1389 | * @sdp: Pointer to GFS2 superblock |
| 1390 | * |
| 1391 | */ |
| 1392 | |
| 1393 | int gfs2_quotad(void *data) |
| 1394 | { |
| 1395 | struct gfs2_sbd *sdp = data; |
| 1396 | struct gfs2_tune *tune = &sdp->sd_tune; |
| 1397 | unsigned long statfs_timeo = 0; |
| 1398 | unsigned long quotad_timeo = 0; |
| 1399 | unsigned long t = 0; |
| 1400 | DEFINE_WAIT(wait); |
Steven Whitehouse | 813e0c4 | 2008-11-18 13:38:48 +0000 | [diff] [blame] | 1401 | int empty; |
Steven Whitehouse | 37b2c83 | 2008-11-17 14:25:37 +0000 | [diff] [blame] | 1402 | |
| 1403 | while (!kthread_should_stop()) { |
| 1404 | |
| 1405 | /* Update the master statfs file */ |
Benjamin Marzinski | 3d3c10f | 2009-10-20 02:39:44 -0500 | [diff] [blame] | 1406 | if (sdp->sd_statfs_force_sync) { |
| 1407 | int error = gfs2_statfs_sync(sdp->sd_vfs, 0); |
| 1408 | quotad_error(sdp, "statfs", error); |
| 1409 | statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ; |
| 1410 | } |
| 1411 | else |
| 1412 | quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t, |
| 1413 | &statfs_timeo, |
| 1414 | &tune->gt_statfs_quantum); |
Steven Whitehouse | 37b2c83 | 2008-11-17 14:25:37 +0000 | [diff] [blame] | 1415 | |
| 1416 | /* Update quota file */ |
Christoph Hellwig | 5fb324a | 2010-02-16 03:44:52 -0500 | [diff] [blame] | 1417 | quotad_check_timeo(sdp, "sync", gfs2_quota_sync_timeo, t, |
Steven Whitehouse | 37b2c83 | 2008-11-17 14:25:37 +0000 | [diff] [blame] | 1418 | "ad_timeo, &tune->gt_quota_quantum); |
| 1419 | |
Steven Whitehouse | 813e0c4 | 2008-11-18 13:38:48 +0000 | [diff] [blame] | 1420 | /* Check for & recover partially truncated inodes */ |
| 1421 | quotad_check_trunc_list(sdp); |
| 1422 | |
Tejun Heo | a0acae0 | 2011-11-21 12:32:22 -0800 | [diff] [blame] | 1423 | try_to_freeze(); |
| 1424 | |
Steven Whitehouse | 37b2c83 | 2008-11-17 14:25:37 +0000 | [diff] [blame] | 1425 | t = min(quotad_timeo, statfs_timeo); |
| 1426 | |
Steven Whitehouse | 7fa5d20 | 2009-03-31 15:49:08 +0100 | [diff] [blame] | 1427 | prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE); |
Steven Whitehouse | 813e0c4 | 2008-11-18 13:38:48 +0000 | [diff] [blame] | 1428 | spin_lock(&sdp->sd_trunc_lock); |
| 1429 | empty = list_empty(&sdp->sd_trunc_list); |
| 1430 | spin_unlock(&sdp->sd_trunc_lock); |
Benjamin Marzinski | 3d3c10f | 2009-10-20 02:39:44 -0500 | [diff] [blame] | 1431 | if (empty && !sdp->sd_statfs_force_sync) |
Steven Whitehouse | 813e0c4 | 2008-11-18 13:38:48 +0000 | [diff] [blame] | 1432 | t -= schedule_timeout(t); |
| 1433 | else |
| 1434 | t = 0; |
Steven Whitehouse | 37b2c83 | 2008-11-17 14:25:37 +0000 | [diff] [blame] | 1435 | finish_wait(&sdp->sd_quota_wait, &wait); |
| 1436 | } |
| 1437 | |
| 1438 | return 0; |
| 1439 | } |
| 1440 | |
Steven Whitehouse | 1d371b5 | 2009-09-11 15:57:27 +0100 | [diff] [blame] | 1441 | static int gfs2_quota_get_xstate(struct super_block *sb, |
| 1442 | struct fs_quota_stat *fqs) |
| 1443 | { |
| 1444 | struct gfs2_sbd *sdp = sb->s_fs_info; |
| 1445 | |
| 1446 | memset(fqs, 0, sizeof(struct fs_quota_stat)); |
| 1447 | fqs->qs_version = FS_QSTAT_VERSION; |
Christoph Hellwig | ad6bb90 | 2010-05-05 00:10:56 +0200 | [diff] [blame] | 1448 | |
| 1449 | switch (sdp->sd_args.ar_quota) { |
| 1450 | case GFS2_QUOTA_ON: |
Christoph Hellwig | ade7ce3 | 2010-06-04 10:56:01 +0200 | [diff] [blame] | 1451 | fqs->qs_flags |= (FS_QUOTA_UDQ_ENFD | FS_QUOTA_GDQ_ENFD); |
Christoph Hellwig | ad6bb90 | 2010-05-05 00:10:56 +0200 | [diff] [blame] | 1452 | /*FALLTHRU*/ |
| 1453 | case GFS2_QUOTA_ACCOUNT: |
Christoph Hellwig | ade7ce3 | 2010-06-04 10:56:01 +0200 | [diff] [blame] | 1454 | fqs->qs_flags |= (FS_QUOTA_UDQ_ACCT | FS_QUOTA_GDQ_ACCT); |
Christoph Hellwig | ad6bb90 | 2010-05-05 00:10:56 +0200 | [diff] [blame] | 1455 | break; |
| 1456 | case GFS2_QUOTA_OFF: |
| 1457 | break; |
| 1458 | } |
| 1459 | |
Steven Whitehouse | 1d371b5 | 2009-09-11 15:57:27 +0100 | [diff] [blame] | 1460 | if (sdp->sd_quota_inode) { |
| 1461 | fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr; |
| 1462 | fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks; |
| 1463 | } |
| 1464 | fqs->qs_uquota.qfs_nextents = 1; /* unsupported */ |
| 1465 | fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */ |
| 1466 | fqs->qs_incoredqs = atomic_read(&qd_lru_count); |
| 1467 | return 0; |
| 1468 | } |
| 1469 | |
Eric W. Biederman | 74a8a10 | 2012-09-16 02:07:49 -0700 | [diff] [blame] | 1470 | static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid, |
Christoph Hellwig | b9b2dd3 | 2010-05-06 17:04:58 -0400 | [diff] [blame] | 1471 | struct fs_disk_quota *fdq) |
Steven Whitehouse | 113d6b3 | 2009-09-28 11:52:16 +0100 | [diff] [blame] | 1472 | { |
| 1473 | struct gfs2_sbd *sdp = sb->s_fs_info; |
| 1474 | struct gfs2_quota_lvb *qlvb; |
| 1475 | struct gfs2_quota_data *qd; |
| 1476 | struct gfs2_holder q_gh; |
| 1477 | int error; |
| 1478 | |
| 1479 | memset(fdq, 0, sizeof(struct fs_disk_quota)); |
| 1480 | |
| 1481 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) |
| 1482 | return -ESRCH; /* Crazy XFS error code */ |
| 1483 | |
Eric W. Biederman | 236c64e | 2013-01-31 20:09:30 -0800 | [diff] [blame] | 1484 | if ((qid.type != USRQUOTA) && |
| 1485 | (qid.type != GRPQUOTA)) |
Steven Whitehouse | 113d6b3 | 2009-09-28 11:52:16 +0100 | [diff] [blame] | 1486 | return -EINVAL; |
| 1487 | |
Eric W. Biederman | 05e0a60 | 2013-01-31 19:52:08 -0800 | [diff] [blame] | 1488 | error = qd_get(sdp, qid, &qd); |
Steven Whitehouse | 113d6b3 | 2009-09-28 11:52:16 +0100 | [diff] [blame] | 1489 | if (error) |
| 1490 | return error; |
| 1491 | error = do_glock(qd, FORCE, &q_gh); |
| 1492 | if (error) |
| 1493 | goto out; |
| 1494 | |
David Teigland | 4e2f884 | 2012-11-14 13:47:37 -0500 | [diff] [blame] | 1495 | qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr; |
Steven Whitehouse | 113d6b3 | 2009-09-28 11:52:16 +0100 | [diff] [blame] | 1496 | fdq->d_version = FS_DQUOT_VERSION; |
Eric W. Biederman | 236c64e | 2013-01-31 20:09:30 -0800 | [diff] [blame] | 1497 | fdq->d_flags = (qid.type == USRQUOTA) ? FS_USER_QUOTA : FS_GROUP_QUOTA; |
Eric W. Biederman | 558e852 | 2013-01-31 18:15:33 -0800 | [diff] [blame] | 1498 | fdq->d_id = from_kqid_munged(current_user_ns(), qid); |
Abhijith Das | 14870b4 | 2010-11-18 11:24:24 -0500 | [diff] [blame] | 1499 | fdq->d_blk_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_fsb2bb_shift; |
| 1500 | fdq->d_blk_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_fsb2bb_shift; |
| 1501 | fdq->d_bcount = be64_to_cpu(qlvb->qb_value) << sdp->sd_fsb2bb_shift; |
Steven Whitehouse | 113d6b3 | 2009-09-28 11:52:16 +0100 | [diff] [blame] | 1502 | |
| 1503 | gfs2_glock_dq_uninit(&q_gh); |
| 1504 | out: |
| 1505 | qd_put(qd); |
| 1506 | return error; |
| 1507 | } |
| 1508 | |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1509 | /* GFS2 only supports a subset of the XFS fields */ |
Abhijith Das | 802ec9b | 2010-11-18 11:26:46 -0500 | [diff] [blame] | 1510 | #define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT) |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1511 | |
Eric W. Biederman | 74a8a10 | 2012-09-16 02:07:49 -0700 | [diff] [blame] | 1512 | static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid, |
Christoph Hellwig | c472b43 | 2010-05-06 17:05:17 -0400 | [diff] [blame] | 1513 | struct fs_disk_quota *fdq) |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1514 | { |
| 1515 | struct gfs2_sbd *sdp = sb->s_fs_info; |
| 1516 | struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode); |
| 1517 | struct gfs2_quota_data *qd; |
| 1518 | struct gfs2_holder q_gh, i_gh; |
| 1519 | unsigned int data_blocks, ind_blocks; |
| 1520 | unsigned int blocks = 0; |
| 1521 | int alloc_required; |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1522 | loff_t offset; |
| 1523 | int error; |
| 1524 | |
| 1525 | if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF) |
| 1526 | return -ESRCH; /* Crazy XFS error code */ |
| 1527 | |
Eric W. Biederman | 236c64e | 2013-01-31 20:09:30 -0800 | [diff] [blame] | 1528 | if ((qid.type != USRQUOTA) && |
| 1529 | (qid.type != GRPQUOTA)) |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1530 | return -EINVAL; |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1531 | |
| 1532 | if (fdq->d_fieldmask & ~GFS2_FIELDMASK) |
| 1533 | return -EINVAL; |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1534 | |
Eric W. Biederman | 05e0a60 | 2013-01-31 19:52:08 -0800 | [diff] [blame] | 1535 | error = qd_get(sdp, qid, &qd); |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1536 | if (error) |
| 1537 | return error; |
| 1538 | |
Bob Peterson | 0a305e4 | 2012-06-06 11:17:59 +0100 | [diff] [blame] | 1539 | error = gfs2_rs_alloc(ip); |
| 1540 | if (error) |
| 1541 | goto out_put; |
| 1542 | |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1543 | mutex_lock(&ip->i_inode.i_mutex); |
| 1544 | error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh); |
| 1545 | if (error) |
Bob Peterson | 0a305e4 | 2012-06-06 11:17:59 +0100 | [diff] [blame] | 1546 | goto out_unlockput; |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1547 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
| 1548 | if (error) |
| 1549 | goto out_q; |
| 1550 | |
| 1551 | /* Check for existing entry, if none then alloc new blocks */ |
| 1552 | error = update_qd(sdp, qd); |
| 1553 | if (error) |
| 1554 | goto out_i; |
| 1555 | |
| 1556 | /* If nothing has changed, this is a no-op */ |
| 1557 | if ((fdq->d_fieldmask & FS_DQ_BSOFT) && |
Abhijith Das | 14870b4 | 2010-11-18 11:24:24 -0500 | [diff] [blame] | 1558 | ((fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_warn))) |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1559 | fdq->d_fieldmask ^= FS_DQ_BSOFT; |
Abhijith Das | 802ec9b | 2010-11-18 11:26:46 -0500 | [diff] [blame] | 1560 | |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1561 | if ((fdq->d_fieldmask & FS_DQ_BHARD) && |
Abhijith Das | 14870b4 | 2010-11-18 11:24:24 -0500 | [diff] [blame] | 1562 | ((fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_limit))) |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1563 | fdq->d_fieldmask ^= FS_DQ_BHARD; |
Abhijith Das | 802ec9b | 2010-11-18 11:26:46 -0500 | [diff] [blame] | 1564 | |
| 1565 | if ((fdq->d_fieldmask & FS_DQ_BCOUNT) && |
| 1566 | ((fdq->d_bcount >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_value))) |
| 1567 | fdq->d_fieldmask ^= FS_DQ_BCOUNT; |
| 1568 | |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1569 | if (fdq->d_fieldmask == 0) |
| 1570 | goto out_i; |
| 1571 | |
| 1572 | offset = qd2offset(qd); |
Bob Peterson | 461cb41 | 2010-06-24 19:21:20 -0400 | [diff] [blame] | 1573 | alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota)); |
Abhijith Das | e79a46a | 2011-02-07 11:22:41 -0500 | [diff] [blame] | 1574 | if (gfs2_is_stuffed(ip)) |
| 1575 | alloc_required = 1; |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1576 | if (alloc_required) { |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1577 | gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota), |
| 1578 | &data_blocks, &ind_blocks); |
Bob Peterson | 564e12b | 2011-11-21 13:36:17 -0500 | [diff] [blame] | 1579 | blocks = 1 + data_blocks + ind_blocks; |
Steven Whitehouse | 9dbe961 | 2012-10-31 10:37:10 +0000 | [diff] [blame] | 1580 | error = gfs2_inplace_reserve(ip, blocks, 0); |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1581 | if (error) |
Bob Peterson | 564e12b | 2011-11-21 13:36:17 -0500 | [diff] [blame] | 1582 | goto out_i; |
Steven Whitehouse | 71f890f | 2012-07-30 14:53:19 +0100 | [diff] [blame] | 1583 | blocks += gfs2_rg_blocks(ip, blocks); |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1584 | } |
| 1585 | |
Abhijith Das | e79a46a | 2011-02-07 11:22:41 -0500 | [diff] [blame] | 1586 | /* Some quotas span block boundaries and can update two blocks, |
| 1587 | adding an extra block to the transaction to handle such quotas */ |
| 1588 | error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0); |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1589 | if (error) |
| 1590 | goto out_release; |
| 1591 | |
| 1592 | /* Apply changes */ |
| 1593 | error = gfs2_adjust_quota(ip, offset, 0, qd, fdq); |
| 1594 | |
| 1595 | gfs2_trans_end(sdp); |
| 1596 | out_release: |
Bob Peterson | 564e12b | 2011-11-21 13:36:17 -0500 | [diff] [blame] | 1597 | if (alloc_required) |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1598 | gfs2_inplace_release(ip); |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1599 | out_i: |
| 1600 | gfs2_glock_dq_uninit(&i_gh); |
| 1601 | out_q: |
| 1602 | gfs2_glock_dq_uninit(&q_gh); |
Bob Peterson | 0a305e4 | 2012-06-06 11:17:59 +0100 | [diff] [blame] | 1603 | out_unlockput: |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1604 | mutex_unlock(&ip->i_inode.i_mutex); |
Bob Peterson | 0a305e4 | 2012-06-06 11:17:59 +0100 | [diff] [blame] | 1605 | out_put: |
Steven Whitehouse | e285c10 | 2009-09-23 13:50:49 +0100 | [diff] [blame] | 1606 | qd_put(qd); |
| 1607 | return error; |
| 1608 | } |
| 1609 | |
Steven Whitehouse | cc632e7 | 2009-09-15 09:59:02 +0100 | [diff] [blame] | 1610 | const struct quotactl_ops gfs2_quotactl_ops = { |
| 1611 | .quota_sync = gfs2_quota_sync, |
Steven Whitehouse | 1d371b5 | 2009-09-11 15:57:27 +0100 | [diff] [blame] | 1612 | .get_xstate = gfs2_quota_get_xstate, |
Christoph Hellwig | b9b2dd3 | 2010-05-06 17:04:58 -0400 | [diff] [blame] | 1613 | .get_dqblk = gfs2_get_dqblk, |
Christoph Hellwig | c472b43 | 2010-05-06 17:05:17 -0400 | [diff] [blame] | 1614 | .set_dqblk = gfs2_set_dqblk, |
Steven Whitehouse | cc632e7 | 2009-09-15 09:59:02 +0100 | [diff] [blame] | 1615 | }; |