Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Implementation of operations over global quota file |
| 3 | */ |
Mark Fasheh | 171bf93 | 2008-10-20 15:36:47 +0200 | [diff] [blame] | 4 | #include <linux/spinlock.h> |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 5 | #include <linux/fs.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 6 | #include <linux/slab.h> |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 7 | #include <linux/quota.h> |
| 8 | #include <linux/quotaops.h> |
| 9 | #include <linux/dqblk_qtree.h> |
Mark Fasheh | 171bf93 | 2008-10-20 15:36:47 +0200 | [diff] [blame] | 10 | #include <linux/jiffies.h> |
| 11 | #include <linux/writeback.h> |
| 12 | #include <linux/workqueue.h> |
Jan Kara | e3a767b | 2014-04-03 14:46:56 -0700 | [diff] [blame] | 13 | #include <linux/llist.h> |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 14 | |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 15 | #include <cluster/masklog.h> |
| 16 | |
| 17 | #include "ocfs2_fs.h" |
| 18 | #include "ocfs2.h" |
| 19 | #include "alloc.h" |
Joel Becker | d6b32bb | 2008-10-17 14:55:01 -0700 | [diff] [blame] | 20 | #include "blockcheck.h" |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 21 | #include "inode.h" |
| 22 | #include "journal.h" |
| 23 | #include "file.h" |
| 24 | #include "sysfile.h" |
| 25 | #include "dlmglue.h" |
| 26 | #include "uptodate.h" |
Jan Kara | ada5082 | 2009-08-03 18:24:21 +0200 | [diff] [blame] | 27 | #include "super.h" |
Jan Kara | f64dd44 | 2010-04-28 00:22:30 +0200 | [diff] [blame] | 28 | #include "buffer_head_io.h" |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 29 | #include "quota.h" |
Tao Ma | 1db986a | 2011-02-23 22:19:12 +0800 | [diff] [blame] | 30 | #include "ocfs2_trace.h" |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 31 | |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 32 | /* |
| 33 | * Locking of quotas with OCFS2 is rather complex. Here are rules that |
| 34 | * should be obeyed by all the functions: |
| 35 | * - any write of quota structure (either to local or global file) is protected |
| 36 | * by dqio_mutex or dquot->dq_lock. |
| 37 | * - any modification of global quota file holds inode cluster lock, i_mutex, |
| 38 | * and ip_alloc_sem of the global quota file (achieved by |
| 39 | * ocfs2_lock_global_qf). It also has to hold qinfo_lock. |
| 40 | * - an allocation of new blocks for local quota file is protected by |
| 41 | * its ip_alloc_sem |
| 42 | * |
| 43 | * A rough sketch of locking dependencies (lf = local file, gf = global file): |
| 44 | * Normal filesystem operation: |
| 45 | * start_trans -> dqio_mutex -> write to lf |
| 46 | * Syncing of local and global file: |
| 47 | * ocfs2_lock_global_qf -> start_trans -> dqio_mutex -> qinfo_lock -> |
| 48 | * write to gf |
| 49 | * -> write to lf |
| 50 | * Acquire dquot for the first time: |
| 51 | * dq_lock -> ocfs2_lock_global_qf -> qinfo_lock -> read from gf |
| 52 | * -> alloc space for gf |
| 53 | * -> start_trans -> qinfo_lock -> write to gf |
| 54 | * -> ip_alloc_sem of lf -> alloc space for lf |
| 55 | * -> write to lf |
| 56 | * Release last reference to dquot: |
| 57 | * dq_lock -> ocfs2_lock_global_qf -> start_trans -> qinfo_lock -> write to gf |
| 58 | * -> write to lf |
| 59 | * Note that all the above operations also hold the inode cluster lock of lf. |
| 60 | * Recovery: |
| 61 | * inode cluster lock of recovered lf |
| 62 | * -> read bitmaps -> ip_alloc_sem of lf |
| 63 | * -> ocfs2_lock_global_qf -> start_trans -> dqio_mutex -> qinfo_lock -> |
| 64 | * write to gf |
| 65 | */ |
| 66 | |
Mark Fasheh | 171bf93 | 2008-10-20 15:36:47 +0200 | [diff] [blame] | 67 | static void qsync_work_fn(struct work_struct *work); |
| 68 | |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 69 | static void ocfs2_global_disk2memdqb(struct dquot *dquot, void *dp) |
| 70 | { |
| 71 | struct ocfs2_global_disk_dqblk *d = dp; |
| 72 | struct mem_dqblk *m = &dquot->dq_dqb; |
| 73 | |
| 74 | /* Update from disk only entries not set by the admin */ |
| 75 | if (!test_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags)) { |
| 76 | m->dqb_ihardlimit = le64_to_cpu(d->dqb_ihardlimit); |
| 77 | m->dqb_isoftlimit = le64_to_cpu(d->dqb_isoftlimit); |
| 78 | } |
| 79 | if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags)) |
| 80 | m->dqb_curinodes = le64_to_cpu(d->dqb_curinodes); |
| 81 | if (!test_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags)) { |
| 82 | m->dqb_bhardlimit = le64_to_cpu(d->dqb_bhardlimit); |
| 83 | m->dqb_bsoftlimit = le64_to_cpu(d->dqb_bsoftlimit); |
| 84 | } |
| 85 | if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags)) |
| 86 | m->dqb_curspace = le64_to_cpu(d->dqb_curspace); |
| 87 | if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags)) |
| 88 | m->dqb_btime = le64_to_cpu(d->dqb_btime); |
| 89 | if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags)) |
| 90 | m->dqb_itime = le64_to_cpu(d->dqb_itime); |
| 91 | OCFS2_DQUOT(dquot)->dq_use_count = le32_to_cpu(d->dqb_use_count); |
| 92 | } |
| 93 | |
| 94 | static void ocfs2_global_mem2diskdqb(void *dp, struct dquot *dquot) |
| 95 | { |
| 96 | struct ocfs2_global_disk_dqblk *d = dp; |
| 97 | struct mem_dqblk *m = &dquot->dq_dqb; |
| 98 | |
Eric W. Biederman | 4c376dc | 2012-09-16 03:56:19 -0700 | [diff] [blame] | 99 | d->dqb_id = cpu_to_le32(from_kqid(&init_user_ns, dquot->dq_id)); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 100 | d->dqb_use_count = cpu_to_le32(OCFS2_DQUOT(dquot)->dq_use_count); |
| 101 | d->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit); |
| 102 | d->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit); |
| 103 | d->dqb_curinodes = cpu_to_le64(m->dqb_curinodes); |
| 104 | d->dqb_bhardlimit = cpu_to_le64(m->dqb_bhardlimit); |
| 105 | d->dqb_bsoftlimit = cpu_to_le64(m->dqb_bsoftlimit); |
| 106 | d->dqb_curspace = cpu_to_le64(m->dqb_curspace); |
| 107 | d->dqb_btime = cpu_to_le64(m->dqb_btime); |
| 108 | d->dqb_itime = cpu_to_le64(m->dqb_itime); |
Jan Kara | 7669f54 | 2009-07-22 13:17:18 +0200 | [diff] [blame] | 109 | d->dqb_pad1 = d->dqb_pad2 = 0; |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 110 | } |
| 111 | |
| 112 | static int ocfs2_global_is_id(void *dp, struct dquot *dquot) |
| 113 | { |
| 114 | struct ocfs2_global_disk_dqblk *d = dp; |
| 115 | struct ocfs2_mem_dqinfo *oinfo = |
Eric W. Biederman | 4c376dc | 2012-09-16 03:56:19 -0700 | [diff] [blame] | 116 | sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv; |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 117 | |
| 118 | if (qtree_entry_unused(&oinfo->dqi_gi, dp)) |
| 119 | return 0; |
Eric W. Biederman | 4c376dc | 2012-09-16 03:56:19 -0700 | [diff] [blame] | 120 | |
| 121 | return qid_eq(make_kqid(&init_user_ns, dquot->dq_id.type, |
| 122 | le32_to_cpu(d->dqb_id)), |
| 123 | dquot->dq_id); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 124 | } |
| 125 | |
Julia Lawall | d1b98c2 | 2016-01-01 08:53:37 +0100 | [diff] [blame] | 126 | const struct qtree_fmt_operations ocfs2_global_ops = { |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 127 | .mem2disk_dqblk = ocfs2_global_mem2diskdqb, |
| 128 | .disk2mem_dqblk = ocfs2_global_disk2memdqb, |
| 129 | .is_id = ocfs2_global_is_id, |
| 130 | }; |
| 131 | |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 132 | int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh) |
Joel Becker | 684ef27 | 2008-12-02 17:44:05 -0800 | [diff] [blame] | 133 | { |
Joel Becker | d6b32bb | 2008-10-17 14:55:01 -0700 | [diff] [blame] | 134 | struct ocfs2_disk_dqtrailer *dqt = |
| 135 | ocfs2_block_dqtrailer(sb->s_blocksize, bh->b_data); |
Joel Becker | 684ef27 | 2008-12-02 17:44:05 -0800 | [diff] [blame] | 136 | |
Tao Ma | 1db986a | 2011-02-23 22:19:12 +0800 | [diff] [blame] | 137 | trace_ocfs2_validate_quota_block((unsigned long long)bh->b_blocknr); |
Joel Becker | 684ef27 | 2008-12-02 17:44:05 -0800 | [diff] [blame] | 138 | |
Joel Becker | d6b32bb | 2008-10-17 14:55:01 -0700 | [diff] [blame] | 139 | BUG_ON(!buffer_uptodate(bh)); |
| 140 | |
| 141 | /* |
| 142 | * If the ecc fails, we return the error but otherwise |
| 143 | * leave the filesystem running. We know any error is |
| 144 | * local to this block. |
| 145 | */ |
| 146 | return ocfs2_validate_meta_ecc(sb, bh->b_data, &dqt->dq_check); |
Joel Becker | 684ef27 | 2008-12-02 17:44:05 -0800 | [diff] [blame] | 147 | } |
| 148 | |
Jan Kara | f64dd44 | 2010-04-28 00:22:30 +0200 | [diff] [blame] | 149 | int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block, |
| 150 | struct buffer_head **bhp) |
| 151 | { |
| 152 | int rc; |
| 153 | |
| 154 | *bhp = NULL; |
| 155 | rc = ocfs2_read_blocks(INODE_CACHE(inode), p_block, 1, bhp, 0, |
| 156 | ocfs2_validate_quota_block); |
| 157 | if (rc) |
| 158 | mlog_errno(rc); |
| 159 | return rc; |
| 160 | } |
| 161 | |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 162 | /* Read data from global quotafile - avoid pagecache and such because we cannot |
| 163 | * afford acquiring the locks... We use quota cluster lock to serialize |
| 164 | * operations. Caller is responsible for acquiring it. */ |
| 165 | ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data, |
| 166 | size_t len, loff_t off) |
| 167 | { |
| 168 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
| 169 | struct inode *gqinode = oinfo->dqi_gqinode; |
| 170 | loff_t i_size = i_size_read(gqinode); |
| 171 | int offset = off & (sb->s_blocksize - 1); |
| 172 | sector_t blk = off >> sb->s_blocksize_bits; |
| 173 | int err = 0; |
| 174 | struct buffer_head *bh; |
| 175 | size_t toread, tocopy; |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 176 | u64 pblock = 0, pcount = 0; |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 177 | |
| 178 | if (off > i_size) |
| 179 | return 0; |
| 180 | if (off + len > i_size) |
| 181 | len = i_size - off; |
| 182 | toread = len; |
| 183 | while (toread > 0) { |
Mark Fasheh | dad7d97 | 2008-12-24 16:33:08 -0800 | [diff] [blame] | 184 | tocopy = min_t(size_t, (sb->s_blocksize - offset), toread); |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 185 | if (!pcount) { |
| 186 | err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock, |
| 187 | &pcount, NULL); |
| 188 | if (err) { |
| 189 | mlog_errno(err); |
| 190 | return err; |
| 191 | } |
| 192 | } else { |
| 193 | pcount--; |
| 194 | pblock++; |
| 195 | } |
Joel Becker | 85eb8b7 | 2008-11-25 15:31:27 +0100 | [diff] [blame] | 196 | bh = NULL; |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 197 | err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh); |
Joel Becker | 85eb8b7 | 2008-11-25 15:31:27 +0100 | [diff] [blame] | 198 | if (err) { |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 199 | mlog_errno(err); |
| 200 | return err; |
| 201 | } |
| 202 | memcpy(data, bh->b_data + offset, tocopy); |
| 203 | brelse(bh); |
| 204 | offset = 0; |
| 205 | toread -= tocopy; |
| 206 | data += tocopy; |
| 207 | blk++; |
| 208 | } |
| 209 | return len; |
| 210 | } |
| 211 | |
| 212 | /* Write to quotafile (we know the transaction is already started and has |
| 213 | * enough credits) */ |
| 214 | ssize_t ocfs2_quota_write(struct super_block *sb, int type, |
| 215 | const char *data, size_t len, loff_t off) |
| 216 | { |
| 217 | struct mem_dqinfo *info = sb_dqinfo(sb, type); |
| 218 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; |
| 219 | struct inode *gqinode = oinfo->dqi_gqinode; |
| 220 | int offset = off & (sb->s_blocksize - 1); |
| 221 | sector_t blk = off >> sb->s_blocksize_bits; |
Jan Kara | af09e51 | 2008-11-25 15:31:28 +0100 | [diff] [blame] | 222 | int err = 0, new = 0, ja_type; |
Joel Becker | 85eb8b7 | 2008-11-25 15:31:27 +0100 | [diff] [blame] | 223 | struct buffer_head *bh = NULL; |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 224 | handle_t *handle = journal_current_handle(); |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 225 | u64 pblock, pcount; |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 226 | |
| 227 | if (!handle) { |
| 228 | mlog(ML_ERROR, "Quota write (off=%llu, len=%llu) cancelled " |
| 229 | "because transaction was not started.\n", |
| 230 | (unsigned long long)off, (unsigned long long)len); |
| 231 | return -EIO; |
| 232 | } |
| 233 | if (len > sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset) { |
| 234 | WARN_ON(1); |
| 235 | len = sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset; |
| 236 | } |
| 237 | |
Junxiao Bi | f17c20d | 2013-09-11 14:19:45 -0700 | [diff] [blame] | 238 | if (i_size_read(gqinode) < off + len) { |
Jan Kara | b57ac2c | 2009-07-22 13:17:15 +0200 | [diff] [blame] | 239 | loff_t rounded_end = |
| 240 | ocfs2_align_bytes_to_blocks(sb, off + len); |
| 241 | |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 242 | /* Space is already allocated in ocfs2_acquire_dquot() */ |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 243 | err = ocfs2_simple_size_update(gqinode, |
| 244 | oinfo->dqi_gqi_bh, |
Jan Kara | b57ac2c | 2009-07-22 13:17:15 +0200 | [diff] [blame] | 245 | rounded_end); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 246 | if (err < 0) |
| 247 | goto out; |
| 248 | new = 1; |
| 249 | } |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 250 | err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock, &pcount, NULL); |
| 251 | if (err) { |
| 252 | mlog_errno(err); |
| 253 | goto out; |
| 254 | } |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 255 | /* Not rewriting whole block? */ |
| 256 | if ((offset || len < sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) && |
| 257 | !new) { |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 258 | err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh); |
Jan Kara | af09e51 | 2008-11-25 15:31:28 +0100 | [diff] [blame] | 259 | ja_type = OCFS2_JOURNAL_ACCESS_WRITE; |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 260 | } else { |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 261 | bh = sb_getblk(sb, pblock); |
| 262 | if (!bh) |
| 263 | err = -ENOMEM; |
Jan Kara | af09e51 | 2008-11-25 15:31:28 +0100 | [diff] [blame] | 264 | ja_type = OCFS2_JOURNAL_ACCESS_CREATE; |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 265 | } |
Jan Kara | af09e51 | 2008-11-25 15:31:28 +0100 | [diff] [blame] | 266 | if (err) { |
| 267 | mlog_errno(err); |
Tao Ma | e9956fa | 2009-07-30 16:07:10 +0800 | [diff] [blame] | 268 | goto out; |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 269 | } |
| 270 | lock_buffer(bh); |
| 271 | if (new) |
| 272 | memset(bh->b_data, 0, sb->s_blocksize); |
| 273 | memcpy(bh->b_data + offset, data, len); |
| 274 | flush_dcache_page(bh->b_page); |
Jan Kara | af09e51 | 2008-11-25 15:31:28 +0100 | [diff] [blame] | 275 | set_buffer_uptodate(bh); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 276 | unlock_buffer(bh); |
Joel Becker | 8cb471e | 2009-02-10 20:00:41 -0800 | [diff] [blame] | 277 | ocfs2_set_buffer_uptodate(INODE_CACHE(gqinode), bh); |
Joel Becker | 0cf2f76 | 2009-02-12 16:41:25 -0800 | [diff] [blame] | 278 | err = ocfs2_journal_access_dq(handle, INODE_CACHE(gqinode), bh, |
| 279 | ja_type); |
Jan Kara | af09e51 | 2008-11-25 15:31:28 +0100 | [diff] [blame] | 280 | if (err < 0) { |
| 281 | brelse(bh); |
| 282 | goto out; |
| 283 | } |
Joel Becker | ec20cec | 2010-03-19 14:13:52 -0700 | [diff] [blame] | 284 | ocfs2_journal_dirty(handle, bh); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 285 | brelse(bh); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 286 | out: |
| 287 | if (err) { |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 288 | mlog_errno(err); |
| 289 | return err; |
| 290 | } |
| 291 | gqinode->i_version++; |
| 292 | ocfs2_mark_inode_dirty(handle, gqinode, oinfo->dqi_gqi_bh); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 293 | return len; |
| 294 | } |
| 295 | |
| 296 | int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex) |
| 297 | { |
| 298 | int status; |
| 299 | struct buffer_head *bh = NULL; |
| 300 | |
| 301 | status = ocfs2_inode_lock(oinfo->dqi_gqinode, &bh, ex); |
| 302 | if (status < 0) |
| 303 | return status; |
| 304 | spin_lock(&dq_data_lock); |
| 305 | if (!oinfo->dqi_gqi_count++) |
| 306 | oinfo->dqi_gqi_bh = bh; |
| 307 | else |
| 308 | WARN_ON(bh != oinfo->dqi_gqi_bh); |
| 309 | spin_unlock(&dq_data_lock); |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 310 | if (ex) { |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 311 | inode_lock(oinfo->dqi_gqinode); |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 312 | down_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem); |
| 313 | } else { |
| 314 | down_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem); |
| 315 | } |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 316 | return 0; |
| 317 | } |
| 318 | |
| 319 | void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex) |
| 320 | { |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 321 | if (ex) { |
| 322 | up_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem); |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 323 | inode_unlock(oinfo->dqi_gqinode); |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 324 | } else { |
| 325 | up_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem); |
| 326 | } |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 327 | ocfs2_inode_unlock(oinfo->dqi_gqinode, ex); |
| 328 | brelse(oinfo->dqi_gqi_bh); |
| 329 | spin_lock(&dq_data_lock); |
| 330 | if (!--oinfo->dqi_gqi_count) |
| 331 | oinfo->dqi_gqi_bh = NULL; |
| 332 | spin_unlock(&dq_data_lock); |
| 333 | } |
| 334 | |
| 335 | /* Read information header from global quota file */ |
| 336 | int ocfs2_global_read_info(struct super_block *sb, int type) |
| 337 | { |
| 338 | struct inode *gqinode = NULL; |
Jan Kara | 5236281 | 2014-09-10 21:06:39 +0200 | [diff] [blame] | 339 | unsigned int ino[OCFS2_MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE, |
| 340 | GROUP_QUOTA_SYSTEM_INODE }; |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 341 | struct ocfs2_global_disk_dqinfo dinfo; |
| 342 | struct mem_dqinfo *info = sb_dqinfo(sb, type); |
| 343 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; |
Jan Kara | ae4f6ef | 2010-04-28 19:04:29 +0200 | [diff] [blame] | 344 | u64 pcount; |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 345 | int status; |
| 346 | |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 347 | /* Read global header */ |
| 348 | gqinode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type], |
| 349 | OCFS2_INVALID_SLOT); |
| 350 | if (!gqinode) { |
| 351 | mlog(ML_ERROR, "failed to get global quota inode (type=%d)\n", |
| 352 | type); |
| 353 | status = -EINVAL; |
| 354 | goto out_err; |
| 355 | } |
| 356 | oinfo->dqi_gi.dqi_sb = sb; |
| 357 | oinfo->dqi_gi.dqi_type = type; |
| 358 | ocfs2_qinfo_lock_res_init(&oinfo->dqi_gqlock, oinfo); |
| 359 | oinfo->dqi_gi.dqi_entry_size = sizeof(struct ocfs2_global_disk_dqblk); |
| 360 | oinfo->dqi_gi.dqi_ops = &ocfs2_global_ops; |
| 361 | oinfo->dqi_gqi_bh = NULL; |
| 362 | oinfo->dqi_gqi_count = 0; |
| 363 | oinfo->dqi_gqinode = gqinode; |
| 364 | status = ocfs2_lock_global_qf(oinfo, 0); |
| 365 | if (status < 0) { |
| 366 | mlog_errno(status); |
| 367 | goto out_err; |
| 368 | } |
Jan Kara | ae4f6ef | 2010-04-28 19:04:29 +0200 | [diff] [blame] | 369 | |
| 370 | status = ocfs2_extent_map_get_blocks(gqinode, 0, &oinfo->dqi_giblk, |
| 371 | &pcount, NULL); |
| 372 | if (status < 0) |
| 373 | goto out_unlock; |
| 374 | |
| 375 | status = ocfs2_qinfo_lock(oinfo, 0); |
| 376 | if (status < 0) |
| 377 | goto out_unlock; |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 378 | status = sb->s_op->quota_read(sb, type, (char *)&dinfo, |
| 379 | sizeof(struct ocfs2_global_disk_dqinfo), |
| 380 | OCFS2_GLOBAL_INFO_OFF); |
Jan Kara | ae4f6ef | 2010-04-28 19:04:29 +0200 | [diff] [blame] | 381 | ocfs2_qinfo_unlock(oinfo, 0); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 382 | ocfs2_unlock_global_qf(oinfo, 0); |
| 383 | if (status != sizeof(struct ocfs2_global_disk_dqinfo)) { |
| 384 | mlog(ML_ERROR, "Cannot read global quota info (%d).\n", |
| 385 | status); |
| 386 | if (status >= 0) |
| 387 | status = -EIO; |
| 388 | mlog_errno(status); |
| 389 | goto out_err; |
| 390 | } |
| 391 | info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace); |
| 392 | info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace); |
| 393 | oinfo->dqi_syncms = le32_to_cpu(dinfo.dqi_syncms); |
| 394 | oinfo->dqi_gi.dqi_blocks = le32_to_cpu(dinfo.dqi_blocks); |
| 395 | oinfo->dqi_gi.dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk); |
| 396 | oinfo->dqi_gi.dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry); |
| 397 | oinfo->dqi_gi.dqi_blocksize_bits = sb->s_blocksize_bits; |
| 398 | oinfo->dqi_gi.dqi_usable_bs = sb->s_blocksize - |
| 399 | OCFS2_QBLK_RESERVED_SPACE; |
| 400 | oinfo->dqi_gi.dqi_qtree_depth = qtree_depth(&oinfo->dqi_gi); |
Mark Fasheh | 171bf93 | 2008-10-20 15:36:47 +0200 | [diff] [blame] | 401 | INIT_DELAYED_WORK(&oinfo->dqi_sync_work, qsync_work_fn); |
Tejun Heo | 316873c | 2011-02-01 11:42:42 +0100 | [diff] [blame] | 402 | schedule_delayed_work(&oinfo->dqi_sync_work, |
| 403 | msecs_to_jiffies(oinfo->dqi_syncms)); |
Mark Fasheh | 171bf93 | 2008-10-20 15:36:47 +0200 | [diff] [blame] | 404 | |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 405 | out_err: |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 406 | return status; |
Jan Kara | ae4f6ef | 2010-04-28 19:04:29 +0200 | [diff] [blame] | 407 | out_unlock: |
| 408 | ocfs2_unlock_global_qf(oinfo, 0); |
| 409 | mlog_errno(status); |
| 410 | goto out_err; |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 411 | } |
| 412 | |
| 413 | /* Write information to global quota file. Expects exlusive lock on quota |
| 414 | * file inode and quota info */ |
| 415 | static int __ocfs2_global_write_info(struct super_block *sb, int type) |
| 416 | { |
| 417 | struct mem_dqinfo *info = sb_dqinfo(sb, type); |
| 418 | struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; |
| 419 | struct ocfs2_global_disk_dqinfo dinfo; |
| 420 | ssize_t size; |
| 421 | |
| 422 | spin_lock(&dq_data_lock); |
| 423 | info->dqi_flags &= ~DQF_INFO_DIRTY; |
| 424 | dinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace); |
| 425 | dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace); |
| 426 | spin_unlock(&dq_data_lock); |
| 427 | dinfo.dqi_syncms = cpu_to_le32(oinfo->dqi_syncms); |
| 428 | dinfo.dqi_blocks = cpu_to_le32(oinfo->dqi_gi.dqi_blocks); |
| 429 | dinfo.dqi_free_blk = cpu_to_le32(oinfo->dqi_gi.dqi_free_blk); |
| 430 | dinfo.dqi_free_entry = cpu_to_le32(oinfo->dqi_gi.dqi_free_entry); |
| 431 | size = sb->s_op->quota_write(sb, type, (char *)&dinfo, |
| 432 | sizeof(struct ocfs2_global_disk_dqinfo), |
| 433 | OCFS2_GLOBAL_INFO_OFF); |
| 434 | if (size != sizeof(struct ocfs2_global_disk_dqinfo)) { |
| 435 | mlog(ML_ERROR, "Cannot write global quota info structure\n"); |
| 436 | if (size >= 0) |
| 437 | size = -EIO; |
| 438 | return size; |
| 439 | } |
| 440 | return 0; |
| 441 | } |
| 442 | |
| 443 | int ocfs2_global_write_info(struct super_block *sb, int type) |
| 444 | { |
| 445 | int err; |
| 446 | struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; |
| 447 | |
| 448 | err = ocfs2_qinfo_lock(info, 1); |
| 449 | if (err < 0) |
| 450 | return err; |
| 451 | err = __ocfs2_global_write_info(sb, type); |
| 452 | ocfs2_qinfo_unlock(info, 1); |
| 453 | return err; |
| 454 | } |
| 455 | |
Jan Kara | b409d7a | 2009-08-06 23:29:34 +0200 | [diff] [blame] | 456 | static int ocfs2_global_qinit_alloc(struct super_block *sb, int type) |
| 457 | { |
| 458 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
| 459 | |
| 460 | /* |
| 461 | * We may need to allocate tree blocks and a leaf block but not the |
| 462 | * root block |
| 463 | */ |
| 464 | return oinfo->dqi_gi.dqi_qtree_depth; |
| 465 | } |
| 466 | |
| 467 | static int ocfs2_calc_global_qinit_credits(struct super_block *sb, int type) |
| 468 | { |
Jan Kara | 832d09c | 2010-05-11 17:04:14 +0200 | [diff] [blame] | 469 | /* We modify all the allocated blocks, tree root, info block and |
| 470 | * the inode */ |
Jan Kara | b409d7a | 2009-08-06 23:29:34 +0200 | [diff] [blame] | 471 | return (ocfs2_global_qinit_alloc(sb, type) + 2) * |
Jan Kara | 832d09c | 2010-05-11 17:04:14 +0200 | [diff] [blame] | 472 | OCFS2_QUOTA_BLOCK_UPDATE_CREDITS + 1; |
Jan Kara | b409d7a | 2009-08-06 23:29:34 +0200 | [diff] [blame] | 473 | } |
| 474 | |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 475 | /* Sync local information about quota modifications with global quota file. |
| 476 | * Caller must have started the transaction and obtained exclusive lock for |
| 477 | * global quota file inode */ |
| 478 | int __ocfs2_sync_dquot(struct dquot *dquot, int freeing) |
| 479 | { |
| 480 | int err, err2; |
| 481 | struct super_block *sb = dquot->dq_sb; |
Eric W. Biederman | 4c376dc | 2012-09-16 03:56:19 -0700 | [diff] [blame] | 482 | int type = dquot->dq_id.type; |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 483 | struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; |
| 484 | struct ocfs2_global_disk_dqblk dqblk; |
| 485 | s64 spacechange, inodechange; |
| 486 | time_t olditime, oldbtime; |
| 487 | |
| 488 | err = sb->s_op->quota_read(sb, type, (char *)&dqblk, |
| 489 | sizeof(struct ocfs2_global_disk_dqblk), |
| 490 | dquot->dq_off); |
| 491 | if (err != sizeof(struct ocfs2_global_disk_dqblk)) { |
| 492 | if (err >= 0) { |
| 493 | mlog(ML_ERROR, "Short read from global quota file " |
| 494 | "(%u read)\n", err); |
| 495 | err = -EIO; |
| 496 | } |
| 497 | goto out; |
| 498 | } |
| 499 | |
| 500 | /* Update space and inode usage. Get also other information from |
| 501 | * global quota file so that we don't overwrite any changes there. |
| 502 | * We are */ |
| 503 | spin_lock(&dq_data_lock); |
| 504 | spacechange = dquot->dq_dqb.dqb_curspace - |
| 505 | OCFS2_DQUOT(dquot)->dq_origspace; |
| 506 | inodechange = dquot->dq_dqb.dqb_curinodes - |
| 507 | OCFS2_DQUOT(dquot)->dq_originodes; |
| 508 | olditime = dquot->dq_dqb.dqb_itime; |
| 509 | oldbtime = dquot->dq_dqb.dqb_btime; |
| 510 | ocfs2_global_disk2memdqb(dquot, &dqblk); |
Eric W. Biederman | 4c376dc | 2012-09-16 03:56:19 -0700 | [diff] [blame] | 511 | trace_ocfs2_sync_dquot(from_kqid(&init_user_ns, dquot->dq_id), |
| 512 | dquot->dq_dqb.dqb_curspace, |
Tao Ma | 1db986a | 2011-02-23 22:19:12 +0800 | [diff] [blame] | 513 | (long long)spacechange, |
| 514 | dquot->dq_dqb.dqb_curinodes, |
| 515 | (long long)inodechange); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 516 | if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags)) |
| 517 | dquot->dq_dqb.dqb_curspace += spacechange; |
| 518 | if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags)) |
| 519 | dquot->dq_dqb.dqb_curinodes += inodechange; |
| 520 | /* Set properly space grace time... */ |
| 521 | if (dquot->dq_dqb.dqb_bsoftlimit && |
| 522 | dquot->dq_dqb.dqb_curspace > dquot->dq_dqb.dqb_bsoftlimit) { |
| 523 | if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags) && |
| 524 | oldbtime > 0) { |
| 525 | if (dquot->dq_dqb.dqb_btime > 0) |
| 526 | dquot->dq_dqb.dqb_btime = |
| 527 | min(dquot->dq_dqb.dqb_btime, oldbtime); |
| 528 | else |
| 529 | dquot->dq_dqb.dqb_btime = oldbtime; |
| 530 | } |
| 531 | } else { |
| 532 | dquot->dq_dqb.dqb_btime = 0; |
| 533 | clear_bit(DQ_BLKS_B, &dquot->dq_flags); |
| 534 | } |
| 535 | /* Set properly inode grace time... */ |
| 536 | if (dquot->dq_dqb.dqb_isoftlimit && |
| 537 | dquot->dq_dqb.dqb_curinodes > dquot->dq_dqb.dqb_isoftlimit) { |
| 538 | if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags) && |
| 539 | olditime > 0) { |
| 540 | if (dquot->dq_dqb.dqb_itime > 0) |
| 541 | dquot->dq_dqb.dqb_itime = |
| 542 | min(dquot->dq_dqb.dqb_itime, olditime); |
| 543 | else |
| 544 | dquot->dq_dqb.dqb_itime = olditime; |
| 545 | } |
| 546 | } else { |
| 547 | dquot->dq_dqb.dqb_itime = 0; |
| 548 | clear_bit(DQ_INODES_B, &dquot->dq_flags); |
| 549 | } |
| 550 | /* All information is properly updated, clear the flags */ |
| 551 | __clear_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags); |
| 552 | __clear_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags); |
| 553 | __clear_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags); |
| 554 | __clear_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags); |
| 555 | __clear_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags); |
| 556 | __clear_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags); |
| 557 | OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace; |
| 558 | OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes; |
| 559 | spin_unlock(&dq_data_lock); |
| 560 | err = ocfs2_qinfo_lock(info, freeing); |
| 561 | if (err < 0) { |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 562 | mlog(ML_ERROR, "Failed to lock quota info, losing quota write" |
Eric W. Biederman | 4c376dc | 2012-09-16 03:56:19 -0700 | [diff] [blame] | 563 | " (type=%d, id=%u)\n", dquot->dq_id.type, |
| 564 | (unsigned)from_kqid(&init_user_ns, dquot->dq_id)); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 565 | goto out; |
| 566 | } |
| 567 | if (freeing) |
| 568 | OCFS2_DQUOT(dquot)->dq_use_count--; |
| 569 | err = qtree_write_dquot(&info->dqi_gi, dquot); |
| 570 | if (err < 0) |
| 571 | goto out_qlock; |
| 572 | if (freeing && !OCFS2_DQUOT(dquot)->dq_use_count) { |
| 573 | err = qtree_release_dquot(&info->dqi_gi, dquot); |
| 574 | if (info_dirty(sb_dqinfo(sb, type))) { |
| 575 | err2 = __ocfs2_global_write_info(sb, type); |
| 576 | if (!err) |
| 577 | err = err2; |
| 578 | } |
| 579 | } |
| 580 | out_qlock: |
| 581 | ocfs2_qinfo_unlock(info, freeing); |
| 582 | out: |
| 583 | if (err < 0) |
| 584 | mlog_errno(err); |
| 585 | return err; |
| 586 | } |
| 587 | |
| 588 | /* |
Mark Fasheh | 171bf93 | 2008-10-20 15:36:47 +0200 | [diff] [blame] | 589 | * Functions for periodic syncing of dquots with global file |
| 590 | */ |
| 591 | static int ocfs2_sync_dquot_helper(struct dquot *dquot, unsigned long type) |
| 592 | { |
| 593 | handle_t *handle; |
| 594 | struct super_block *sb = dquot->dq_sb; |
| 595 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
| 596 | struct ocfs2_super *osb = OCFS2_SB(sb); |
| 597 | int status = 0; |
| 598 | |
Eric W. Biederman | 4c376dc | 2012-09-16 03:56:19 -0700 | [diff] [blame] | 599 | trace_ocfs2_sync_dquot_helper(from_kqid(&init_user_ns, dquot->dq_id), |
| 600 | dquot->dq_id.type, |
Tao Ma | 1db986a | 2011-02-23 22:19:12 +0800 | [diff] [blame] | 601 | type, sb->s_id); |
Eric W. Biederman | 4c376dc | 2012-09-16 03:56:19 -0700 | [diff] [blame] | 602 | if (type != dquot->dq_id.type) |
Mark Fasheh | 171bf93 | 2008-10-20 15:36:47 +0200 | [diff] [blame] | 603 | goto out; |
| 604 | status = ocfs2_lock_global_qf(oinfo, 1); |
| 605 | if (status < 0) |
| 606 | goto out; |
| 607 | |
| 608 | handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS); |
| 609 | if (IS_ERR(handle)) { |
| 610 | status = PTR_ERR(handle); |
| 611 | mlog_errno(status); |
| 612 | goto out_ilock; |
| 613 | } |
| 614 | mutex_lock(&sb_dqopt(sb)->dqio_mutex); |
| 615 | status = ocfs2_sync_dquot(dquot); |
Mark Fasheh | 171bf93 | 2008-10-20 15:36:47 +0200 | [diff] [blame] | 616 | if (status < 0) |
| 617 | mlog_errno(status); |
| 618 | /* We have to write local structure as well... */ |
Jan Kara | 741e128 | 2010-05-13 18:05:15 +0200 | [diff] [blame] | 619 | status = ocfs2_local_write_dquot(dquot); |
Mark Fasheh | 171bf93 | 2008-10-20 15:36:47 +0200 | [diff] [blame] | 620 | if (status < 0) |
| 621 | mlog_errno(status); |
Jan Kara | 741e128 | 2010-05-13 18:05:15 +0200 | [diff] [blame] | 622 | mutex_unlock(&sb_dqopt(sb)->dqio_mutex); |
Mark Fasheh | 171bf93 | 2008-10-20 15:36:47 +0200 | [diff] [blame] | 623 | ocfs2_commit_trans(osb, handle); |
| 624 | out_ilock: |
| 625 | ocfs2_unlock_global_qf(oinfo, 1); |
| 626 | out: |
Mark Fasheh | 171bf93 | 2008-10-20 15:36:47 +0200 | [diff] [blame] | 627 | return status; |
| 628 | } |
| 629 | |
| 630 | static void qsync_work_fn(struct work_struct *work) |
| 631 | { |
| 632 | struct ocfs2_mem_dqinfo *oinfo = container_of(work, |
| 633 | struct ocfs2_mem_dqinfo, |
| 634 | dqi_sync_work.work); |
| 635 | struct super_block *sb = oinfo->dqi_gqinode->i_sb; |
| 636 | |
| 637 | dquot_scan_active(sb, ocfs2_sync_dquot_helper, oinfo->dqi_type); |
Tejun Heo | 316873c | 2011-02-01 11:42:42 +0100 | [diff] [blame] | 638 | schedule_delayed_work(&oinfo->dqi_sync_work, |
| 639 | msecs_to_jiffies(oinfo->dqi_syncms)); |
Mark Fasheh | 171bf93 | 2008-10-20 15:36:47 +0200 | [diff] [blame] | 640 | } |
| 641 | |
| 642 | /* |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 643 | * Wrappers for generic quota functions |
| 644 | */ |
| 645 | |
| 646 | static int ocfs2_write_dquot(struct dquot *dquot) |
| 647 | { |
| 648 | handle_t *handle; |
| 649 | struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb); |
| 650 | int status = 0; |
| 651 | |
Eric W. Biederman | 4c376dc | 2012-09-16 03:56:19 -0700 | [diff] [blame] | 652 | trace_ocfs2_write_dquot(from_kqid(&init_user_ns, dquot->dq_id), |
| 653 | dquot->dq_id.type); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 654 | |
| 655 | handle = ocfs2_start_trans(osb, OCFS2_QWRITE_CREDITS); |
| 656 | if (IS_ERR(handle)) { |
| 657 | status = PTR_ERR(handle); |
| 658 | mlog_errno(status); |
| 659 | goto out; |
| 660 | } |
Jan Kara | 741e128 | 2010-05-13 18:05:15 +0200 | [diff] [blame] | 661 | mutex_lock(&sb_dqopt(dquot->dq_sb)->dqio_mutex); |
| 662 | status = ocfs2_local_write_dquot(dquot); |
| 663 | mutex_unlock(&sb_dqopt(dquot->dq_sb)->dqio_mutex); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 664 | ocfs2_commit_trans(osb, handle); |
| 665 | out: |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 666 | return status; |
| 667 | } |
| 668 | |
Jan Kara | b409d7a | 2009-08-06 23:29:34 +0200 | [diff] [blame] | 669 | static int ocfs2_calc_qdel_credits(struct super_block *sb, int type) |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 670 | { |
Jan Kara | b409d7a | 2009-08-06 23:29:34 +0200 | [diff] [blame] | 671 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
Jan Kara | 0584974 | 2009-07-22 13:17:21 +0200 | [diff] [blame] | 672 | /* |
| 673 | * We modify tree, leaf block, global info, local chunk header, |
| 674 | * global and local inode; OCFS2_QINFO_WRITE_CREDITS already |
| 675 | * accounts for inode update |
| 676 | */ |
Jan Kara | b409d7a | 2009-08-06 23:29:34 +0200 | [diff] [blame] | 677 | return (oinfo->dqi_gi.dqi_qtree_depth + 2) * |
| 678 | OCFS2_QUOTA_BLOCK_UPDATE_CREDITS + |
Jan Kara | 0584974 | 2009-07-22 13:17:21 +0200 | [diff] [blame] | 679 | OCFS2_QINFO_WRITE_CREDITS + |
Jan Kara | 0584974 | 2009-07-22 13:17:21 +0200 | [diff] [blame] | 680 | OCFS2_INODE_UPDATE_CREDITS; |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 681 | } |
| 682 | |
Jan Kara | e3a767b | 2014-04-03 14:46:56 -0700 | [diff] [blame] | 683 | void ocfs2_drop_dquot_refs(struct work_struct *work) |
| 684 | { |
| 685 | struct ocfs2_super *osb = container_of(work, struct ocfs2_super, |
| 686 | dquot_drop_work); |
| 687 | struct llist_node *list; |
| 688 | struct ocfs2_dquot *odquot, *next_odquot; |
| 689 | |
| 690 | list = llist_del_all(&osb->dquot_drop_list); |
| 691 | llist_for_each_entry_safe(odquot, next_odquot, list, list) { |
| 692 | /* Drop the reference we acquired in ocfs2_dquot_release() */ |
| 693 | dqput(&odquot->dq_dquot); |
| 694 | } |
| 695 | } |
| 696 | |
| 697 | /* |
| 698 | * Called when the last reference to dquot is dropped. If we are called from |
| 699 | * downconvert thread, we cannot do all the handling here because grabbing |
| 700 | * quota lock could deadlock (the node holding the quota lock could need some |
| 701 | * other cluster lock to proceed but with blocked downconvert thread we cannot |
| 702 | * release any lock). |
| 703 | */ |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 704 | static int ocfs2_release_dquot(struct dquot *dquot) |
| 705 | { |
| 706 | handle_t *handle; |
| 707 | struct ocfs2_mem_dqinfo *oinfo = |
Eric W. Biederman | 4c376dc | 2012-09-16 03:56:19 -0700 | [diff] [blame] | 708 | sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv; |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 709 | struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb); |
| 710 | int status = 0; |
| 711 | |
Eric W. Biederman | 4c376dc | 2012-09-16 03:56:19 -0700 | [diff] [blame] | 712 | trace_ocfs2_release_dquot(from_kqid(&init_user_ns, dquot->dq_id), |
| 713 | dquot->dq_id.type); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 714 | |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 715 | mutex_lock(&dquot->dq_lock); |
| 716 | /* Check whether we are not racing with some other dqget() */ |
| 717 | if (atomic_read(&dquot->dq_count) > 1) |
| 718 | goto out; |
Jan Kara | e3a767b | 2014-04-03 14:46:56 -0700 | [diff] [blame] | 719 | /* Running from downconvert thread? Postpone quota processing to wq */ |
| 720 | if (current == osb->dc_task) { |
| 721 | /* |
| 722 | * Grab our own reference to dquot and queue it for delayed |
| 723 | * dropping. Quota code rechecks after calling |
| 724 | * ->release_dquot() and won't free dquot structure. |
| 725 | */ |
| 726 | dqgrab(dquot); |
| 727 | /* First entry on list -> queue work */ |
| 728 | if (llist_add(&OCFS2_DQUOT(dquot)->list, &osb->dquot_drop_list)) |
| 729 | queue_work(ocfs2_wq, &osb->dquot_drop_work); |
| 730 | goto out; |
| 731 | } |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 732 | status = ocfs2_lock_global_qf(oinfo, 1); |
| 733 | if (status < 0) |
| 734 | goto out; |
| 735 | handle = ocfs2_start_trans(osb, |
Eric W. Biederman | 4c376dc | 2012-09-16 03:56:19 -0700 | [diff] [blame] | 736 | ocfs2_calc_qdel_credits(dquot->dq_sb, dquot->dq_id.type)); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 737 | if (IS_ERR(handle)) { |
| 738 | status = PTR_ERR(handle); |
| 739 | mlog_errno(status); |
| 740 | goto out_ilock; |
| 741 | } |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 742 | |
| 743 | status = ocfs2_global_release_dquot(dquot); |
| 744 | if (status < 0) { |
| 745 | mlog_errno(status); |
| 746 | goto out_trans; |
| 747 | } |
| 748 | status = ocfs2_local_release_dquot(handle, dquot); |
| 749 | /* |
| 750 | * If we fail here, we cannot do much as global structure is |
| 751 | * already released. So just complain... |
| 752 | */ |
| 753 | if (status < 0) |
| 754 | mlog_errno(status); |
Jan Kara | 15c34a7 | 2014-03-03 15:38:32 -0800 | [diff] [blame] | 755 | /* |
| 756 | * Clear dq_off so that we search for the structure in quota file next |
| 757 | * time we acquire it. The structure might be deleted and reallocated |
| 758 | * elsewhere by another node while our dquot structure is on freelist. |
| 759 | */ |
| 760 | dquot->dq_off = 0; |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 761 | clear_bit(DQ_ACTIVE_B, &dquot->dq_flags); |
| 762 | out_trans: |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 763 | ocfs2_commit_trans(osb, handle); |
| 764 | out_ilock: |
| 765 | ocfs2_unlock_global_qf(oinfo, 1); |
| 766 | out: |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 767 | mutex_unlock(&dquot->dq_lock); |
Tao Ma | c1e8d35 | 2011-03-07 16:43:21 +0800 | [diff] [blame] | 768 | if (status) |
| 769 | mlog_errno(status); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 770 | return status; |
| 771 | } |
| 772 | |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 773 | /* |
| 774 | * Read global dquot structure from disk or create it if it does |
| 775 | * not exist. Also update use count of the global structure and |
| 776 | * create structure in node-local quota file. |
| 777 | */ |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 778 | static int ocfs2_acquire_dquot(struct dquot *dquot) |
| 779 | { |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 780 | int status = 0, err; |
| 781 | int ex = 0; |
| 782 | struct super_block *sb = dquot->dq_sb; |
| 783 | struct ocfs2_super *osb = OCFS2_SB(sb); |
Eric W. Biederman | 4c376dc | 2012-09-16 03:56:19 -0700 | [diff] [blame] | 784 | int type = dquot->dq_id.type; |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 785 | struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; |
| 786 | struct inode *gqinode = info->dqi_gqinode; |
| 787 | int need_alloc = ocfs2_global_qinit_alloc(sb, type); |
| 788 | handle_t *handle; |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 789 | |
Eric W. Biederman | 4c376dc | 2012-09-16 03:56:19 -0700 | [diff] [blame] | 790 | trace_ocfs2_acquire_dquot(from_kqid(&init_user_ns, dquot->dq_id), |
| 791 | type); |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 792 | mutex_lock(&dquot->dq_lock); |
| 793 | /* |
| 794 | * We need an exclusive lock, because we're going to update use count |
| 795 | * and instantiate possibly new dquot structure |
| 796 | */ |
| 797 | status = ocfs2_lock_global_qf(info, 1); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 798 | if (status < 0) |
| 799 | goto out; |
Jan Kara | 15c34a7 | 2014-03-03 15:38:32 -0800 | [diff] [blame] | 800 | status = ocfs2_qinfo_lock(info, 0); |
| 801 | if (status < 0) |
| 802 | goto out_dq; |
| 803 | /* |
| 804 | * We always want to read dquot structure from disk because we don't |
| 805 | * know what happened with it while it was on freelist. |
| 806 | */ |
| 807 | status = qtree_read_dquot(&info->dqi_gi, dquot); |
| 808 | ocfs2_qinfo_unlock(info, 0); |
| 809 | if (status < 0) |
| 810 | goto out_dq; |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 811 | |
| 812 | OCFS2_DQUOT(dquot)->dq_use_count++; |
| 813 | OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace; |
| 814 | OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes; |
| 815 | if (!dquot->dq_off) { /* No real quota entry? */ |
| 816 | ex = 1; |
| 817 | /* |
| 818 | * Add blocks to quota file before we start a transaction since |
| 819 | * locking allocators ranks above a transaction start |
| 820 | */ |
| 821 | WARN_ON(journal_current_handle()); |
Joel Becker | 5693486 | 2010-07-01 15:13:31 -0700 | [diff] [blame] | 822 | status = ocfs2_extend_no_holes(gqinode, NULL, |
Junxiao Bi | f17c20d | 2013-09-11 14:19:45 -0700 | [diff] [blame] | 823 | i_size_read(gqinode) + (need_alloc << sb->s_blocksize_bits), |
| 824 | i_size_read(gqinode)); |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 825 | if (status < 0) |
| 826 | goto out_dq; |
| 827 | } |
| 828 | |
| 829 | handle = ocfs2_start_trans(osb, |
| 830 | ocfs2_calc_global_qinit_credits(sb, type)); |
| 831 | if (IS_ERR(handle)) { |
| 832 | status = PTR_ERR(handle); |
| 833 | goto out_dq; |
| 834 | } |
| 835 | status = ocfs2_qinfo_lock(info, ex); |
| 836 | if (status < 0) |
| 837 | goto out_trans; |
| 838 | status = qtree_write_dquot(&info->dqi_gi, dquot); |
| 839 | if (ex && info_dirty(sb_dqinfo(sb, type))) { |
| 840 | err = __ocfs2_global_write_info(sb, type); |
| 841 | if (!status) |
| 842 | status = err; |
| 843 | } |
| 844 | ocfs2_qinfo_unlock(info, ex); |
| 845 | out_trans: |
| 846 | ocfs2_commit_trans(osb, handle); |
| 847 | out_dq: |
| 848 | ocfs2_unlock_global_qf(info, 1); |
| 849 | if (status < 0) |
| 850 | goto out; |
| 851 | |
| 852 | status = ocfs2_create_local_dquot(dquot); |
| 853 | if (status < 0) |
| 854 | goto out; |
| 855 | set_bit(DQ_ACTIVE_B, &dquot->dq_flags); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 856 | out: |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 857 | mutex_unlock(&dquot->dq_lock); |
Tao Ma | c1e8d35 | 2011-03-07 16:43:21 +0800 | [diff] [blame] | 858 | if (status) |
| 859 | mlog_errno(status); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 860 | return status; |
| 861 | } |
| 862 | |
Jan Kara | 5a9530e | 2016-02-04 14:50:26 +0100 | [diff] [blame] | 863 | static int ocfs2_get_next_id(struct super_block *sb, struct kqid *qid) |
| 864 | { |
| 865 | int type = qid->type; |
| 866 | struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; |
| 867 | int status = 0; |
| 868 | |
| 869 | trace_ocfs2_get_next_id(from_kqid(&init_user_ns, *qid), type); |
| 870 | status = ocfs2_lock_global_qf(info, 0); |
| 871 | if (status < 0) |
| 872 | goto out; |
| 873 | status = ocfs2_qinfo_lock(info, 0); |
| 874 | if (status < 0) |
| 875 | goto out_global; |
| 876 | status = qtree_get_next_id(&info->dqi_gi, qid); |
| 877 | ocfs2_qinfo_unlock(info, 0); |
| 878 | out_global: |
| 879 | ocfs2_unlock_global_qf(info, 0); |
| 880 | out: |
| 881 | /* Avoid logging ENOENT since it just means there isn't next ID */ |
| 882 | if (status && status != -ENOENT) |
| 883 | mlog_errno(status); |
| 884 | return status; |
| 885 | } |
| 886 | |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 887 | static int ocfs2_mark_dquot_dirty(struct dquot *dquot) |
| 888 | { |
| 889 | unsigned long mask = (1 << (DQ_LASTSET_B + QIF_ILIMITS_B)) | |
| 890 | (1 << (DQ_LASTSET_B + QIF_BLIMITS_B)) | |
| 891 | (1 << (DQ_LASTSET_B + QIF_INODES_B)) | |
| 892 | (1 << (DQ_LASTSET_B + QIF_SPACE_B)) | |
| 893 | (1 << (DQ_LASTSET_B + QIF_BTIME_B)) | |
| 894 | (1 << (DQ_LASTSET_B + QIF_ITIME_B)); |
| 895 | int sync = 0; |
| 896 | int status; |
| 897 | struct super_block *sb = dquot->dq_sb; |
Eric W. Biederman | 4c376dc | 2012-09-16 03:56:19 -0700 | [diff] [blame] | 898 | int type = dquot->dq_id.type; |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 899 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
| 900 | handle_t *handle; |
| 901 | struct ocfs2_super *osb = OCFS2_SB(sb); |
| 902 | |
Eric W. Biederman | 4c376dc | 2012-09-16 03:56:19 -0700 | [diff] [blame] | 903 | trace_ocfs2_mark_dquot_dirty(from_kqid(&init_user_ns, dquot->dq_id), |
| 904 | type); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 905 | |
| 906 | /* In case user set some limits, sync dquot immediately to global |
| 907 | * quota file so that information propagates quicker */ |
| 908 | spin_lock(&dq_data_lock); |
| 909 | if (dquot->dq_flags & mask) |
| 910 | sync = 1; |
| 911 | spin_unlock(&dq_data_lock); |
Jan Kara | f8afead | 2009-01-12 23:20:32 +0100 | [diff] [blame] | 912 | /* This is a slight hack but we can't afford getting global quota |
| 913 | * lock if we already have a transaction started. */ |
| 914 | if (!sync || journal_current_handle()) { |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 915 | status = ocfs2_write_dquot(dquot); |
| 916 | goto out; |
| 917 | } |
| 918 | status = ocfs2_lock_global_qf(oinfo, 1); |
| 919 | if (status < 0) |
| 920 | goto out; |
| 921 | handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS); |
| 922 | if (IS_ERR(handle)) { |
| 923 | status = PTR_ERR(handle); |
| 924 | mlog_errno(status); |
| 925 | goto out_ilock; |
| 926 | } |
Jan Kara | fb8dd8d | 2010-03-31 16:25:37 +0200 | [diff] [blame] | 927 | mutex_lock(&sb_dqopt(sb)->dqio_mutex); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 928 | status = ocfs2_sync_dquot(dquot); |
| 929 | if (status < 0) { |
| 930 | mlog_errno(status); |
Jan Kara | 741e128 | 2010-05-13 18:05:15 +0200 | [diff] [blame] | 931 | goto out_dlock; |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 932 | } |
| 933 | /* Now write updated local dquot structure */ |
Jan Kara | 741e128 | 2010-05-13 18:05:15 +0200 | [diff] [blame] | 934 | status = ocfs2_local_write_dquot(dquot); |
| 935 | out_dlock: |
| 936 | mutex_unlock(&sb_dqopt(sb)->dqio_mutex); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 937 | ocfs2_commit_trans(osb, handle); |
| 938 | out_ilock: |
| 939 | ocfs2_unlock_global_qf(oinfo, 1); |
| 940 | out: |
Tao Ma | c1e8d35 | 2011-03-07 16:43:21 +0800 | [diff] [blame] | 941 | if (status) |
| 942 | mlog_errno(status); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 943 | return status; |
| 944 | } |
| 945 | |
| 946 | /* This should happen only after set_dqinfo(). */ |
| 947 | static int ocfs2_write_info(struct super_block *sb, int type) |
| 948 | { |
| 949 | handle_t *handle; |
| 950 | int status = 0; |
| 951 | struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
| 952 | |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 953 | status = ocfs2_lock_global_qf(oinfo, 1); |
| 954 | if (status < 0) |
| 955 | goto out; |
| 956 | handle = ocfs2_start_trans(OCFS2_SB(sb), OCFS2_QINFO_WRITE_CREDITS); |
| 957 | if (IS_ERR(handle)) { |
| 958 | status = PTR_ERR(handle); |
| 959 | mlog_errno(status); |
| 960 | goto out_ilock; |
| 961 | } |
| 962 | status = dquot_commit_info(sb, type); |
| 963 | ocfs2_commit_trans(OCFS2_SB(sb), handle); |
| 964 | out_ilock: |
| 965 | ocfs2_unlock_global_qf(oinfo, 1); |
| 966 | out: |
Tao Ma | c1e8d35 | 2011-03-07 16:43:21 +0800 | [diff] [blame] | 967 | if (status) |
| 968 | mlog_errno(status); |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 969 | return status; |
| 970 | } |
| 971 | |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 972 | static struct dquot *ocfs2_alloc_dquot(struct super_block *sb, int type) |
| 973 | { |
| 974 | struct ocfs2_dquot *dquot = |
| 975 | kmem_cache_zalloc(ocfs2_dquot_cachep, GFP_NOFS); |
| 976 | |
| 977 | if (!dquot) |
| 978 | return NULL; |
| 979 | return &dquot->dq_dquot; |
| 980 | } |
| 981 | |
| 982 | static void ocfs2_destroy_dquot(struct dquot *dquot) |
| 983 | { |
| 984 | kmem_cache_free(ocfs2_dquot_cachep, dquot); |
| 985 | } |
| 986 | |
Alexey Dobriyan | 61e225d | 2009-09-21 17:01:08 -0700 | [diff] [blame] | 987 | const struct dquot_operations ocfs2_quota_operations = { |
Jan Kara | 741e128 | 2010-05-13 18:05:15 +0200 | [diff] [blame] | 988 | /* We never make dquot dirty so .write_dquot is never called */ |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 989 | .acquire_dquot = ocfs2_acquire_dquot, |
| 990 | .release_dquot = ocfs2_release_dquot, |
| 991 | .mark_dirty = ocfs2_mark_dquot_dirty, |
| 992 | .write_info = ocfs2_write_info, |
| 993 | .alloc_dquot = ocfs2_alloc_dquot, |
| 994 | .destroy_dquot = ocfs2_destroy_dquot, |
Jan Kara | 5a9530e | 2016-02-04 14:50:26 +0100 | [diff] [blame] | 995 | .get_next_id = ocfs2_get_next_id, |
Jan Kara | 9e33d69 | 2008-08-25 19:56:50 +0200 | [diff] [blame] | 996 | }; |