Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1 | /* -*- mode: c; c-basic-offset: 8; -*- |
| 2 | * vim: noexpandtab sw=8 ts=8 sts=0: |
| 3 | * |
| 4 | * file.c |
| 5 | * |
| 6 | * File open, close, extend, truncate |
| 7 | * |
| 8 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public |
| 12 | * License as published by the Free Software Foundation; either |
| 13 | * version 2 of the License, or (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public |
| 21 | * License along with this program; if not, write to the |
| 22 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 23 | * Boston, MA 021110-1307, USA. |
| 24 | */ |
| 25 | |
Randy Dunlap | 16f7e0f | 2006-01-11 12:17:46 -0800 | [diff] [blame] | 26 | #include <linux/capability.h> |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 27 | #include <linux/fs.h> |
| 28 | #include <linux/types.h> |
| 29 | #include <linux/slab.h> |
| 30 | #include <linux/highmem.h> |
| 31 | #include <linux/pagemap.h> |
| 32 | #include <linux/uio.h> |
Mark Fasheh | e2057c5 | 2006-10-03 17:53:05 -0700 | [diff] [blame] | 33 | #include <linux/sched.h> |
Jens Axboe | d6b29d7 | 2007-06-04 09:59:47 +0200 | [diff] [blame] | 34 | #include <linux/splice.h> |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 35 | #include <linux/mount.h> |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 36 | #include <linux/writeback.h> |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 37 | #include <linux/falloc.h> |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 38 | |
| 39 | #define MLOG_MASK_PREFIX ML_INODE |
| 40 | #include <cluster/masklog.h> |
| 41 | |
| 42 | #include "ocfs2.h" |
| 43 | |
| 44 | #include "alloc.h" |
| 45 | #include "aops.h" |
| 46 | #include "dir.h" |
| 47 | #include "dlmglue.h" |
| 48 | #include "extent_map.h" |
| 49 | #include "file.h" |
| 50 | #include "sysfile.h" |
| 51 | #include "inode.h" |
Herbert Poetzl | ca4d147 | 2006-07-03 17:27:12 -0700 | [diff] [blame] | 52 | #include "ioctl.h" |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 53 | #include "journal.h" |
| 54 | #include "mmap.h" |
| 55 | #include "suballoc.h" |
| 56 | #include "super.h" |
| 57 | |
| 58 | #include "buffer_head_io.h" |
| 59 | |
| 60 | static int ocfs2_sync_inode(struct inode *inode) |
| 61 | { |
| 62 | filemap_fdatawrite(inode->i_mapping); |
| 63 | return sync_mapping_buffers(inode->i_mapping); |
| 64 | } |
| 65 | |
| 66 | static int ocfs2_file_open(struct inode *inode, struct file *file) |
| 67 | { |
| 68 | int status; |
| 69 | int mode = file->f_flags; |
| 70 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 71 | |
| 72 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file, |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 73 | file->f_path.dentry->d_name.len, file->f_path.dentry->d_name.name); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 74 | |
| 75 | spin_lock(&oi->ip_lock); |
| 76 | |
| 77 | /* Check that the inode hasn't been wiped from disk by another |
| 78 | * node. If it hasn't then we're safe as long as we hold the |
| 79 | * spin lock until our increment of open count. */ |
| 80 | if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) { |
| 81 | spin_unlock(&oi->ip_lock); |
| 82 | |
| 83 | status = -ENOENT; |
| 84 | goto leave; |
| 85 | } |
| 86 | |
| 87 | if (mode & O_DIRECT) |
| 88 | oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT; |
| 89 | |
| 90 | oi->ip_open_count++; |
| 91 | spin_unlock(&oi->ip_lock); |
| 92 | status = 0; |
| 93 | leave: |
| 94 | mlog_exit(status); |
| 95 | return status; |
| 96 | } |
| 97 | |
| 98 | static int ocfs2_file_release(struct inode *inode, struct file *file) |
| 99 | { |
| 100 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 101 | |
| 102 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file, |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 103 | file->f_path.dentry->d_name.len, |
| 104 | file->f_path.dentry->d_name.name); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 105 | |
| 106 | spin_lock(&oi->ip_lock); |
| 107 | if (!--oi->ip_open_count) |
| 108 | oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT; |
| 109 | spin_unlock(&oi->ip_lock); |
| 110 | |
| 111 | mlog_exit(0); |
| 112 | |
| 113 | return 0; |
| 114 | } |
| 115 | |
| 116 | static int ocfs2_sync_file(struct file *file, |
| 117 | struct dentry *dentry, |
| 118 | int datasync) |
| 119 | { |
| 120 | int err = 0; |
| 121 | journal_t *journal; |
| 122 | struct inode *inode = dentry->d_inode; |
| 123 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 124 | |
| 125 | mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", file, dentry, datasync, |
| 126 | dentry->d_name.len, dentry->d_name.name); |
| 127 | |
| 128 | err = ocfs2_sync_inode(dentry->d_inode); |
| 129 | if (err) |
| 130 | goto bail; |
| 131 | |
| 132 | journal = osb->journal->j_journal; |
| 133 | err = journal_force_commit(journal); |
| 134 | |
| 135 | bail: |
| 136 | mlog_exit(err); |
| 137 | |
| 138 | return (err < 0) ? -EIO : 0; |
| 139 | } |
| 140 | |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 141 | int ocfs2_should_update_atime(struct inode *inode, |
| 142 | struct vfsmount *vfsmnt) |
| 143 | { |
| 144 | struct timespec now; |
| 145 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 146 | |
| 147 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
| 148 | return 0; |
| 149 | |
| 150 | if ((inode->i_flags & S_NOATIME) || |
| 151 | ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode))) |
| 152 | return 0; |
| 153 | |
Mark Fasheh | 6c2aad0 | 2006-12-19 15:25:52 -0800 | [diff] [blame] | 154 | /* |
| 155 | * We can be called with no vfsmnt structure - NFSD will |
| 156 | * sometimes do this. |
| 157 | * |
| 158 | * Note that our action here is different than touch_atime() - |
| 159 | * if we can't tell whether this is a noatime mount, then we |
| 160 | * don't know whether to trust the value of s_atime_quantum. |
| 161 | */ |
| 162 | if (vfsmnt == NULL) |
| 163 | return 0; |
| 164 | |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 165 | if ((vfsmnt->mnt_flags & MNT_NOATIME) || |
| 166 | ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) |
| 167 | return 0; |
| 168 | |
Mark Fasheh | 7e913c5 | 2006-12-13 00:34:35 -0800 | [diff] [blame] | 169 | if (vfsmnt->mnt_flags & MNT_RELATIME) { |
| 170 | if ((timespec_compare(&inode->i_atime, &inode->i_mtime) <= 0) || |
| 171 | (timespec_compare(&inode->i_atime, &inode->i_ctime) <= 0)) |
| 172 | return 1; |
| 173 | |
| 174 | return 0; |
| 175 | } |
| 176 | |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 177 | now = CURRENT_TIME; |
| 178 | if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum)) |
| 179 | return 0; |
| 180 | else |
| 181 | return 1; |
| 182 | } |
| 183 | |
| 184 | int ocfs2_update_inode_atime(struct inode *inode, |
| 185 | struct buffer_head *bh) |
| 186 | { |
| 187 | int ret; |
| 188 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 189 | handle_t *handle; |
Mark Fasheh | c11e9fa | 2007-07-20 11:24:53 -0700 | [diff] [blame] | 190 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data; |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 191 | |
| 192 | mlog_entry_void(); |
| 193 | |
| 194 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
| 195 | if (handle == NULL) { |
| 196 | ret = -ENOMEM; |
| 197 | mlog_errno(ret); |
| 198 | goto out; |
| 199 | } |
| 200 | |
Mark Fasheh | c11e9fa | 2007-07-20 11:24:53 -0700 | [diff] [blame] | 201 | ret = ocfs2_journal_access(handle, inode, bh, |
| 202 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 203 | if (ret) { |
| 204 | mlog_errno(ret); |
| 205 | goto out_commit; |
| 206 | } |
| 207 | |
| 208 | /* |
| 209 | * Don't use ocfs2_mark_inode_dirty() here as we don't always |
| 210 | * have i_mutex to guard against concurrent changes to other |
| 211 | * inode fields. |
| 212 | */ |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 213 | inode->i_atime = CURRENT_TIME; |
Mark Fasheh | c11e9fa | 2007-07-20 11:24:53 -0700 | [diff] [blame] | 214 | di->i_atime = cpu_to_le64(inode->i_atime.tv_sec); |
| 215 | di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); |
| 216 | |
| 217 | ret = ocfs2_journal_dirty(handle, bh); |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 218 | if (ret < 0) |
| 219 | mlog_errno(ret); |
| 220 | |
Mark Fasheh | c11e9fa | 2007-07-20 11:24:53 -0700 | [diff] [blame] | 221 | out_commit: |
Tiger Yang | 7f1a37e | 2006-11-15 15:48:42 +0800 | [diff] [blame] | 222 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
| 223 | out: |
| 224 | mlog_exit(ret); |
| 225 | return ret; |
| 226 | } |
| 227 | |
Adrian Bunk | 6cb129f | 2007-04-26 00:29:35 -0700 | [diff] [blame] | 228 | static int ocfs2_set_inode_size(handle_t *handle, |
| 229 | struct inode *inode, |
| 230 | struct buffer_head *fe_bh, |
| 231 | u64 new_i_size) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 232 | { |
| 233 | int status; |
| 234 | |
| 235 | mlog_entry_void(); |
| 236 | i_size_write(inode, new_i_size); |
Mark Fasheh | 8110b07 | 2007-03-22 16:53:23 -0700 | [diff] [blame] | 237 | inode->i_blocks = ocfs2_inode_sector_count(inode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 238 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
| 239 | |
| 240 | status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); |
| 241 | if (status < 0) { |
| 242 | mlog_errno(status); |
| 243 | goto bail; |
| 244 | } |
| 245 | |
| 246 | bail: |
| 247 | mlog_exit(status); |
| 248 | return status; |
| 249 | } |
| 250 | |
| 251 | static int ocfs2_simple_size_update(struct inode *inode, |
| 252 | struct buffer_head *di_bh, |
| 253 | u64 new_i_size) |
| 254 | { |
| 255 | int ret; |
| 256 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 257 | handle_t *handle = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 258 | |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 259 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 260 | if (handle == NULL) { |
| 261 | ret = -ENOMEM; |
| 262 | mlog_errno(ret); |
| 263 | goto out; |
| 264 | } |
| 265 | |
| 266 | ret = ocfs2_set_inode_size(handle, inode, di_bh, |
| 267 | new_i_size); |
| 268 | if (ret < 0) |
| 269 | mlog_errno(ret); |
| 270 | |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 271 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 272 | out: |
| 273 | return ret; |
| 274 | } |
| 275 | |
| 276 | static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb, |
| 277 | struct inode *inode, |
| 278 | struct buffer_head *fe_bh, |
| 279 | u64 new_i_size) |
| 280 | { |
| 281 | int status; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 282 | handle_t *handle; |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 283 | struct ocfs2_dinode *di; |
Mark Fasheh | 35edec1 | 2007-07-06 14:41:18 -0700 | [diff] [blame] | 284 | u64 cluster_bytes; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 285 | |
| 286 | mlog_entry_void(); |
| 287 | |
| 288 | /* TODO: This needs to actually orphan the inode in this |
| 289 | * transaction. */ |
| 290 | |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 291 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 292 | if (IS_ERR(handle)) { |
| 293 | status = PTR_ERR(handle); |
| 294 | mlog_errno(status); |
| 295 | goto out; |
| 296 | } |
| 297 | |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 298 | status = ocfs2_journal_access(handle, inode, fe_bh, |
| 299 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 300 | if (status < 0) { |
| 301 | mlog_errno(status); |
| 302 | goto out_commit; |
| 303 | } |
| 304 | |
| 305 | /* |
| 306 | * Do this before setting i_size. |
| 307 | */ |
Mark Fasheh | 35edec1 | 2007-07-06 14:41:18 -0700 | [diff] [blame] | 308 | cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size); |
| 309 | status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size, |
| 310 | cluster_bytes); |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 311 | if (status) { |
| 312 | mlog_errno(status); |
| 313 | goto out_commit; |
| 314 | } |
| 315 | |
| 316 | i_size_write(inode, new_i_size); |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 317 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
| 318 | |
| 319 | di = (struct ocfs2_dinode *) fe_bh->b_data; |
| 320 | di->i_size = cpu_to_le64(new_i_size); |
| 321 | di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec); |
| 322 | di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); |
| 323 | |
| 324 | status = ocfs2_journal_dirty(handle, fe_bh); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 325 | if (status < 0) |
| 326 | mlog_errno(status); |
| 327 | |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 328 | out_commit: |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 329 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 330 | out: |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 331 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 332 | mlog_exit(status); |
| 333 | return status; |
| 334 | } |
| 335 | |
| 336 | static int ocfs2_truncate_file(struct inode *inode, |
| 337 | struct buffer_head *di_bh, |
| 338 | u64 new_i_size) |
| 339 | { |
| 340 | int status = 0; |
| 341 | struct ocfs2_dinode *fe = NULL; |
| 342 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 343 | struct ocfs2_truncate_context *tc = NULL; |
| 344 | |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 345 | mlog_entry("(inode = %llu, new_i_size = %llu\n", |
| 346 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 347 | (unsigned long long)new_i_size); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 348 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 349 | fe = (struct ocfs2_dinode *) di_bh->b_data; |
| 350 | if (!OCFS2_IS_VALID_DINODE(fe)) { |
| 351 | OCFS2_RO_ON_INVALID_DINODE(inode->i_sb, fe); |
| 352 | status = -EIO; |
| 353 | goto bail; |
| 354 | } |
| 355 | |
| 356 | mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode), |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 357 | "Inode %llu, inode i_size = %lld != di " |
| 358 | "i_size = %llu, i_flags = 0x%x\n", |
| 359 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 360 | i_size_read(inode), |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 361 | (unsigned long long)le64_to_cpu(fe->i_size), |
| 362 | le32_to_cpu(fe->i_flags)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 363 | |
| 364 | if (new_i_size > le64_to_cpu(fe->i_size)) { |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 365 | mlog(0, "asked to truncate file with size (%llu) to size (%llu)!\n", |
| 366 | (unsigned long long)le64_to_cpu(fe->i_size), |
| 367 | (unsigned long long)new_i_size); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 368 | status = -EINVAL; |
| 369 | mlog_errno(status); |
| 370 | goto bail; |
| 371 | } |
| 372 | |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 373 | mlog(0, "inode %llu, i_size = %llu, new_i_size = %llu\n", |
| 374 | (unsigned long long)le64_to_cpu(fe->i_blkno), |
| 375 | (unsigned long long)le64_to_cpu(fe->i_size), |
| 376 | (unsigned long long)new_i_size); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 377 | |
| 378 | /* lets handle the simple truncate cases before doing any more |
| 379 | * cluster locking. */ |
| 380 | if (new_i_size == le64_to_cpu(fe->i_size)) |
| 381 | goto bail; |
| 382 | |
Mark Fasheh | 2e89b2e | 2007-05-09 13:40:18 -0700 | [diff] [blame] | 383 | down_write(&OCFS2_I(inode)->ip_alloc_sem); |
| 384 | |
Mark Fasheh | ab0920c | 2006-03-16 15:06:37 -0800 | [diff] [blame] | 385 | /* This forces other nodes to sync and drop their pages. Do |
| 386 | * this even if we have a truncate without allocation change - |
| 387 | * ocfs2 cluster sizes can be much greater than page size, so |
| 388 | * we have to truncate them anyway. */ |
| 389 | status = ocfs2_data_lock(inode, 1); |
| 390 | if (status < 0) { |
Mark Fasheh | 2e89b2e | 2007-05-09 13:40:18 -0700 | [diff] [blame] | 391 | up_write(&OCFS2_I(inode)->ip_alloc_sem); |
| 392 | |
Mark Fasheh | ab0920c | 2006-03-16 15:06:37 -0800 | [diff] [blame] | 393 | mlog_errno(status); |
| 394 | goto bail; |
| 395 | } |
Mark Fasheh | ab0920c | 2006-03-16 15:06:37 -0800 | [diff] [blame] | 396 | |
Mark Fasheh | 2e89b2e | 2007-05-09 13:40:18 -0700 | [diff] [blame] | 397 | unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1); |
| 398 | truncate_inode_pages(inode->i_mapping, new_i_size); |
| 399 | |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 400 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 401 | status = ocfs2_truncate_inline(inode, di_bh, new_i_size, |
| 402 | i_size_read(inode), 0); |
| 403 | if (status) |
| 404 | mlog_errno(status); |
| 405 | |
| 406 | goto bail_unlock_data; |
| 407 | } |
| 408 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 409 | /* alright, we're going to need to do a full blown alloc size |
| 410 | * change. Orphan the inode so that recovery can complete the |
| 411 | * truncate if necessary. This does the task of marking |
| 412 | * i_size. */ |
| 413 | status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size); |
| 414 | if (status < 0) { |
| 415 | mlog_errno(status); |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 416 | goto bail_unlock_data; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 417 | } |
| 418 | |
| 419 | status = ocfs2_prepare_truncate(osb, inode, di_bh, &tc); |
| 420 | if (status < 0) { |
| 421 | mlog_errno(status); |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 422 | goto bail_unlock_data; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 423 | } |
| 424 | |
| 425 | status = ocfs2_commit_truncate(osb, inode, di_bh, tc); |
| 426 | if (status < 0) { |
| 427 | mlog_errno(status); |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 428 | goto bail_unlock_data; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 429 | } |
| 430 | |
| 431 | /* TODO: orphan dir cleanup here. */ |
Mark Fasheh | 60b1139 | 2007-02-16 11:46:50 -0800 | [diff] [blame] | 432 | bail_unlock_data: |
| 433 | ocfs2_data_unlock(inode, 1); |
| 434 | |
Mark Fasheh | 2e89b2e | 2007-05-09 13:40:18 -0700 | [diff] [blame] | 435 | up_write(&OCFS2_I(inode)->ip_alloc_sem); |
| 436 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 437 | bail: |
| 438 | |
| 439 | mlog_exit(status); |
| 440 | return status; |
| 441 | } |
| 442 | |
| 443 | /* |
| 444 | * extend allocation only here. |
| 445 | * we'll update all the disk stuff, and oip->alloc_size |
| 446 | * |
| 447 | * expect stuff to be locked, a transaction started and enough data / |
| 448 | * metadata reservations in the contexts. |
| 449 | * |
| 450 | * Will return -EAGAIN, and a reason if a restart is needed. |
| 451 | * If passed in, *reason will always be set, even in error. |
| 452 | */ |
| 453 | int ocfs2_do_extend_allocation(struct ocfs2_super *osb, |
| 454 | struct inode *inode, |
Mark Fasheh | dcd0538 | 2007-01-16 11:32:23 -0800 | [diff] [blame] | 455 | u32 *logical_offset, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 456 | u32 clusters_to_add, |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 457 | int mark_unwritten, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 458 | struct buffer_head *fe_bh, |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 459 | handle_t *handle, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 460 | struct ocfs2_alloc_context *data_ac, |
| 461 | struct ocfs2_alloc_context *meta_ac, |
| 462 | enum ocfs2_alloc_restarted *reason_ret) |
| 463 | { |
| 464 | int status = 0; |
| 465 | int free_extents; |
| 466 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; |
| 467 | enum ocfs2_alloc_restarted reason = RESTART_NONE; |
| 468 | u32 bit_off, num_bits; |
| 469 | u64 block; |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 470 | u8 flags = 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 471 | |
| 472 | BUG_ON(!clusters_to_add); |
| 473 | |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 474 | if (mark_unwritten) |
| 475 | flags = OCFS2_EXT_UNWRITTEN; |
| 476 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 477 | free_extents = ocfs2_num_free_extents(osb, inode, fe); |
| 478 | if (free_extents < 0) { |
| 479 | status = free_extents; |
| 480 | mlog_errno(status); |
| 481 | goto leave; |
| 482 | } |
| 483 | |
| 484 | /* there are two cases which could cause us to EAGAIN in the |
| 485 | * we-need-more-metadata case: |
| 486 | * 1) we haven't reserved *any* |
| 487 | * 2) we are so fragmented, we've needed to add metadata too |
| 488 | * many times. */ |
| 489 | if (!free_extents && !meta_ac) { |
| 490 | mlog(0, "we haven't reserved any metadata!\n"); |
| 491 | status = -EAGAIN; |
| 492 | reason = RESTART_META; |
| 493 | goto leave; |
| 494 | } else if ((!free_extents) |
| 495 | && (ocfs2_alloc_context_bits_left(meta_ac) |
| 496 | < ocfs2_extend_meta_needed(fe))) { |
| 497 | mlog(0, "filesystem is really fragmented...\n"); |
| 498 | status = -EAGAIN; |
| 499 | reason = RESTART_META; |
| 500 | goto leave; |
| 501 | } |
| 502 | |
Mark Fasheh | 415cb80 | 2007-09-16 20:10:16 -0700 | [diff] [blame] | 503 | status = __ocfs2_claim_clusters(osb, handle, data_ac, 1, |
| 504 | clusters_to_add, &bit_off, &num_bits); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 505 | if (status < 0) { |
| 506 | if (status != -ENOSPC) |
| 507 | mlog_errno(status); |
| 508 | goto leave; |
| 509 | } |
| 510 | |
| 511 | BUG_ON(num_bits > clusters_to_add); |
| 512 | |
| 513 | /* reserve our write early -- insert_extent may update the inode */ |
| 514 | status = ocfs2_journal_access(handle, inode, fe_bh, |
| 515 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 516 | if (status < 0) { |
| 517 | mlog_errno(status); |
| 518 | goto leave; |
| 519 | } |
| 520 | |
| 521 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 522 | mlog(0, "Allocating %u clusters at block %u for inode %llu\n", |
| 523 | num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno); |
Mark Fasheh | dcd0538 | 2007-01-16 11:32:23 -0800 | [diff] [blame] | 524 | status = ocfs2_insert_extent(osb, handle, inode, fe_bh, |
| 525 | *logical_offset, block, num_bits, |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 526 | flags, meta_ac); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 527 | if (status < 0) { |
| 528 | mlog_errno(status); |
| 529 | goto leave; |
| 530 | } |
| 531 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 532 | status = ocfs2_journal_dirty(handle, fe_bh); |
| 533 | if (status < 0) { |
| 534 | mlog_errno(status); |
| 535 | goto leave; |
| 536 | } |
| 537 | |
| 538 | clusters_to_add -= num_bits; |
Mark Fasheh | dcd0538 | 2007-01-16 11:32:23 -0800 | [diff] [blame] | 539 | *logical_offset += num_bits; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 540 | |
| 541 | if (clusters_to_add) { |
| 542 | mlog(0, "need to alloc once more, clusters = %u, wanted = " |
| 543 | "%u\n", fe->i_clusters, clusters_to_add); |
| 544 | status = -EAGAIN; |
| 545 | reason = RESTART_TRANS; |
| 546 | } |
| 547 | |
| 548 | leave: |
| 549 | mlog_exit(status); |
| 550 | if (reason_ret) |
| 551 | *reason_ret = reason; |
| 552 | return status; |
| 553 | } |
| 554 | |
Mark Fasheh | abf8b15 | 2007-01-17 13:07:24 -0800 | [diff] [blame] | 555 | /* |
| 556 | * For a given allocation, determine which allocators will need to be |
| 557 | * accessed, and lock them, reserving the appropriate number of bits. |
| 558 | * |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 559 | * Sparse file systems call this from ocfs2_write_begin_nolock() |
| 560 | * and ocfs2_allocate_unwritten_extents(). |
| 561 | * |
| 562 | * File systems which don't support holes call this from |
| 563 | * ocfs2_extend_allocation(). |
Mark Fasheh | abf8b15 | 2007-01-17 13:07:24 -0800 | [diff] [blame] | 564 | */ |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 565 | int ocfs2_lock_allocators(struct inode *inode, struct ocfs2_dinode *di, |
Mark Fasheh | b27b7cb | 2007-06-18 11:22:56 -0700 | [diff] [blame] | 566 | u32 clusters_to_add, u32 extents_to_split, |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 567 | struct ocfs2_alloc_context **data_ac, |
| 568 | struct ocfs2_alloc_context **meta_ac) |
Mark Fasheh | abf8b15 | 2007-01-17 13:07:24 -0800 | [diff] [blame] | 569 | { |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 570 | int ret = 0, num_free_extents; |
Mark Fasheh | b27b7cb | 2007-06-18 11:22:56 -0700 | [diff] [blame] | 571 | unsigned int max_recs_needed = clusters_to_add + 2 * extents_to_split; |
Mark Fasheh | abf8b15 | 2007-01-17 13:07:24 -0800 | [diff] [blame] | 572 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 573 | |
| 574 | *meta_ac = NULL; |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 575 | if (data_ac) |
| 576 | *data_ac = NULL; |
| 577 | |
| 578 | BUG_ON(clusters_to_add != 0 && data_ac == NULL); |
Mark Fasheh | abf8b15 | 2007-01-17 13:07:24 -0800 | [diff] [blame] | 579 | |
| 580 | mlog(0, "extend inode %llu, i_size = %lld, di->i_clusters = %u, " |
Mark Fasheh | b27b7cb | 2007-06-18 11:22:56 -0700 | [diff] [blame] | 581 | "clusters_to_add = %u, extents_to_split = %u\n", |
Mark Fasheh | abf8b15 | 2007-01-17 13:07:24 -0800 | [diff] [blame] | 582 | (unsigned long long)OCFS2_I(inode)->ip_blkno, i_size_read(inode), |
Mark Fasheh | b27b7cb | 2007-06-18 11:22:56 -0700 | [diff] [blame] | 583 | le32_to_cpu(di->i_clusters), clusters_to_add, extents_to_split); |
Mark Fasheh | abf8b15 | 2007-01-17 13:07:24 -0800 | [diff] [blame] | 584 | |
| 585 | num_free_extents = ocfs2_num_free_extents(osb, inode, di); |
| 586 | if (num_free_extents < 0) { |
| 587 | ret = num_free_extents; |
| 588 | mlog_errno(ret); |
| 589 | goto out; |
| 590 | } |
| 591 | |
| 592 | /* |
| 593 | * Sparse allocation file systems need to be more conservative |
| 594 | * with reserving room for expansion - the actual allocation |
| 595 | * happens while we've got a journal handle open so re-taking |
| 596 | * a cluster lock (because we ran out of room for another |
| 597 | * extent) will violate ordering rules. |
| 598 | * |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 599 | * Most of the time we'll only be seeing this 1 cluster at a time |
Mark Fasheh | abf8b15 | 2007-01-17 13:07:24 -0800 | [diff] [blame] | 600 | * anyway. |
Mark Fasheh | b27b7cb | 2007-06-18 11:22:56 -0700 | [diff] [blame] | 601 | * |
| 602 | * Always lock for any unwritten extents - we might want to |
| 603 | * add blocks during a split. |
Mark Fasheh | abf8b15 | 2007-01-17 13:07:24 -0800 | [diff] [blame] | 604 | */ |
| 605 | if (!num_free_extents || |
Mark Fasheh | b27b7cb | 2007-06-18 11:22:56 -0700 | [diff] [blame] | 606 | (ocfs2_sparse_alloc(osb) && num_free_extents < max_recs_needed)) { |
Mark Fasheh | abf8b15 | 2007-01-17 13:07:24 -0800 | [diff] [blame] | 607 | ret = ocfs2_reserve_new_metadata(osb, di, meta_ac); |
| 608 | if (ret < 0) { |
| 609 | if (ret != -ENOSPC) |
| 610 | mlog_errno(ret); |
| 611 | goto out; |
| 612 | } |
| 613 | } |
| 614 | |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 615 | if (clusters_to_add == 0) |
| 616 | goto out; |
| 617 | |
Mark Fasheh | abf8b15 | 2007-01-17 13:07:24 -0800 | [diff] [blame] | 618 | ret = ocfs2_reserve_clusters(osb, clusters_to_add, data_ac); |
| 619 | if (ret < 0) { |
| 620 | if (ret != -ENOSPC) |
| 621 | mlog_errno(ret); |
| 622 | goto out; |
| 623 | } |
| 624 | |
| 625 | out: |
| 626 | if (ret) { |
| 627 | if (*meta_ac) { |
| 628 | ocfs2_free_alloc_context(*meta_ac); |
| 629 | *meta_ac = NULL; |
| 630 | } |
| 631 | |
| 632 | /* |
| 633 | * We cannot have an error and a non null *data_ac. |
| 634 | */ |
| 635 | } |
| 636 | |
| 637 | return ret; |
| 638 | } |
| 639 | |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 640 | static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start, |
| 641 | u32 clusters_to_add, int mark_unwritten) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 642 | { |
| 643 | int status = 0; |
| 644 | int restart_func = 0; |
Mark Fasheh | abf8b15 | 2007-01-17 13:07:24 -0800 | [diff] [blame] | 645 | int credits; |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 646 | u32 prev_clusters; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 647 | struct buffer_head *bh = NULL; |
| 648 | struct ocfs2_dinode *fe = NULL; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 649 | handle_t *handle = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 650 | struct ocfs2_alloc_context *data_ac = NULL; |
| 651 | struct ocfs2_alloc_context *meta_ac = NULL; |
| 652 | enum ocfs2_alloc_restarted why; |
| 653 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 654 | |
| 655 | mlog_entry("(clusters_to_add = %u)\n", clusters_to_add); |
| 656 | |
Mark Fasheh | dcd0538 | 2007-01-16 11:32:23 -0800 | [diff] [blame] | 657 | /* |
| 658 | * This function only exists for file systems which don't |
| 659 | * support holes. |
| 660 | */ |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 661 | BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb)); |
Mark Fasheh | dcd0538 | 2007-01-16 11:32:23 -0800 | [diff] [blame] | 662 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 663 | status = ocfs2_read_block(osb, OCFS2_I(inode)->ip_blkno, &bh, |
| 664 | OCFS2_BH_CACHED, inode); |
| 665 | if (status < 0) { |
| 666 | mlog_errno(status); |
| 667 | goto leave; |
| 668 | } |
| 669 | |
| 670 | fe = (struct ocfs2_dinode *) bh->b_data; |
| 671 | if (!OCFS2_IS_VALID_DINODE(fe)) { |
| 672 | OCFS2_RO_ON_INVALID_DINODE(inode->i_sb, fe); |
| 673 | status = -EIO; |
| 674 | goto leave; |
| 675 | } |
| 676 | |
| 677 | restart_all: |
| 678 | BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters); |
| 679 | |
Mark Fasheh | b27b7cb | 2007-06-18 11:22:56 -0700 | [diff] [blame] | 680 | status = ocfs2_lock_allocators(inode, fe, clusters_to_add, 0, &data_ac, |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 681 | &meta_ac); |
| 682 | if (status) { |
| 683 | mlog_errno(status); |
| 684 | goto leave; |
| 685 | } |
| 686 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 687 | credits = ocfs2_calc_extend_credits(osb->sb, fe, clusters_to_add); |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 688 | handle = ocfs2_start_trans(osb, credits); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 689 | if (IS_ERR(handle)) { |
| 690 | status = PTR_ERR(handle); |
| 691 | handle = NULL; |
| 692 | mlog_errno(status); |
| 693 | goto leave; |
| 694 | } |
| 695 | |
| 696 | restarted_transaction: |
| 697 | /* reserve a write to the file entry early on - that we if we |
| 698 | * run out of credits in the allocation path, we can still |
| 699 | * update i_size. */ |
| 700 | status = ocfs2_journal_access(handle, inode, bh, |
| 701 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 702 | if (status < 0) { |
| 703 | mlog_errno(status); |
| 704 | goto leave; |
| 705 | } |
| 706 | |
| 707 | prev_clusters = OCFS2_I(inode)->ip_clusters; |
| 708 | |
| 709 | status = ocfs2_do_extend_allocation(osb, |
| 710 | inode, |
Mark Fasheh | dcd0538 | 2007-01-16 11:32:23 -0800 | [diff] [blame] | 711 | &logical_start, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 712 | clusters_to_add, |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 713 | mark_unwritten, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 714 | bh, |
| 715 | handle, |
| 716 | data_ac, |
| 717 | meta_ac, |
| 718 | &why); |
| 719 | if ((status < 0) && (status != -EAGAIN)) { |
| 720 | if (status != -ENOSPC) |
| 721 | mlog_errno(status); |
| 722 | goto leave; |
| 723 | } |
| 724 | |
| 725 | status = ocfs2_journal_dirty(handle, bh); |
| 726 | if (status < 0) { |
| 727 | mlog_errno(status); |
| 728 | goto leave; |
| 729 | } |
| 730 | |
| 731 | spin_lock(&OCFS2_I(inode)->ip_lock); |
| 732 | clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters); |
| 733 | spin_unlock(&OCFS2_I(inode)->ip_lock); |
| 734 | |
| 735 | if (why != RESTART_NONE && clusters_to_add) { |
| 736 | if (why == RESTART_META) { |
| 737 | mlog(0, "restarting function.\n"); |
| 738 | restart_func = 1; |
| 739 | } else { |
| 740 | BUG_ON(why != RESTART_TRANS); |
| 741 | |
| 742 | mlog(0, "restarting transaction.\n"); |
| 743 | /* TODO: This can be more intelligent. */ |
| 744 | credits = ocfs2_calc_extend_credits(osb->sb, |
| 745 | fe, |
| 746 | clusters_to_add); |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 747 | status = ocfs2_extend_trans(handle, credits); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 748 | if (status < 0) { |
| 749 | /* handle still has to be committed at |
| 750 | * this point. */ |
| 751 | status = -ENOMEM; |
| 752 | mlog_errno(status); |
| 753 | goto leave; |
| 754 | } |
| 755 | goto restarted_transaction; |
| 756 | } |
| 757 | } |
| 758 | |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 759 | mlog(0, "fe: i_clusters = %u, i_size=%llu\n", |
Mark Fasheh | 1ca1a11 | 2007-04-27 16:01:25 -0700 | [diff] [blame] | 760 | le32_to_cpu(fe->i_clusters), |
| 761 | (unsigned long long)le64_to_cpu(fe->i_size)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 762 | mlog(0, "inode: ip_clusters=%u, i_size=%lld\n", |
| 763 | OCFS2_I(inode)->ip_clusters, i_size_read(inode)); |
| 764 | |
| 765 | leave: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 766 | if (handle) { |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 767 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 768 | handle = NULL; |
| 769 | } |
| 770 | if (data_ac) { |
| 771 | ocfs2_free_alloc_context(data_ac); |
| 772 | data_ac = NULL; |
| 773 | } |
| 774 | if (meta_ac) { |
| 775 | ocfs2_free_alloc_context(meta_ac); |
| 776 | meta_ac = NULL; |
| 777 | } |
| 778 | if ((!status) && restart_func) { |
| 779 | restart_func = 0; |
| 780 | goto restart_all; |
| 781 | } |
| 782 | if (bh) { |
| 783 | brelse(bh); |
| 784 | bh = NULL; |
| 785 | } |
| 786 | |
| 787 | mlog_exit(status); |
| 788 | return status; |
| 789 | } |
| 790 | |
| 791 | /* Some parts of this taken from generic_cont_expand, which turned out |
| 792 | * to be too fragile to do exactly what we need without us having to |
Mark Fasheh | 53013cb | 2006-05-05 19:04:03 -0700 | [diff] [blame] | 793 | * worry about recursive locking in ->prepare_write() and |
| 794 | * ->commit_write(). */ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 795 | static int ocfs2_write_zero_page(struct inode *inode, |
| 796 | u64 size) |
| 797 | { |
| 798 | struct address_space *mapping = inode->i_mapping; |
| 799 | struct page *page; |
| 800 | unsigned long index; |
| 801 | unsigned int offset; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 802 | handle_t *handle = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 803 | int ret; |
| 804 | |
| 805 | offset = (size & (PAGE_CACHE_SIZE-1)); /* Within page */ |
| 806 | /* ugh. in prepare/commit_write, if from==to==start of block, we |
| 807 | ** skip the prepare. make sure we never send an offset for the start |
| 808 | ** of a block |
| 809 | */ |
| 810 | if ((offset & (inode->i_sb->s_blocksize - 1)) == 0) { |
| 811 | offset++; |
| 812 | } |
| 813 | index = size >> PAGE_CACHE_SHIFT; |
| 814 | |
| 815 | page = grab_cache_page(mapping, index); |
| 816 | if (!page) { |
| 817 | ret = -ENOMEM; |
| 818 | mlog_errno(ret); |
| 819 | goto out; |
| 820 | } |
| 821 | |
Mark Fasheh | 53013cb | 2006-05-05 19:04:03 -0700 | [diff] [blame] | 822 | ret = ocfs2_prepare_write_nolock(inode, page, offset, offset); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 823 | if (ret < 0) { |
| 824 | mlog_errno(ret); |
| 825 | goto out_unlock; |
| 826 | } |
| 827 | |
| 828 | if (ocfs2_should_order_data(inode)) { |
| 829 | handle = ocfs2_start_walk_page_trans(inode, page, offset, |
| 830 | offset); |
| 831 | if (IS_ERR(handle)) { |
| 832 | ret = PTR_ERR(handle); |
| 833 | handle = NULL; |
| 834 | goto out_unlock; |
| 835 | } |
| 836 | } |
| 837 | |
| 838 | /* must not update i_size! */ |
| 839 | ret = block_commit_write(page, offset, offset); |
| 840 | if (ret < 0) |
| 841 | mlog_errno(ret); |
| 842 | else |
| 843 | ret = 0; |
| 844 | |
| 845 | if (handle) |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 846 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 847 | out_unlock: |
| 848 | unlock_page(page); |
| 849 | page_cache_release(page); |
| 850 | out: |
| 851 | return ret; |
| 852 | } |
| 853 | |
| 854 | static int ocfs2_zero_extend(struct inode *inode, |
| 855 | u64 zero_to_size) |
| 856 | { |
| 857 | int ret = 0; |
| 858 | u64 start_off; |
| 859 | struct super_block *sb = inode->i_sb; |
| 860 | |
| 861 | start_off = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode)); |
| 862 | while (start_off < zero_to_size) { |
| 863 | ret = ocfs2_write_zero_page(inode, start_off); |
| 864 | if (ret < 0) { |
| 865 | mlog_errno(ret); |
| 866 | goto out; |
| 867 | } |
| 868 | |
| 869 | start_off += sb->s_blocksize; |
Mark Fasheh | e2057c5 | 2006-10-03 17:53:05 -0700 | [diff] [blame] | 870 | |
| 871 | /* |
| 872 | * Very large extends have the potential to lock up |
| 873 | * the cpu for extended periods of time. |
| 874 | */ |
| 875 | cond_resched(); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 876 | } |
| 877 | |
| 878 | out: |
| 879 | return ret; |
| 880 | } |
| 881 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 882 | int ocfs2_extend_no_holes(struct inode *inode, u64 new_i_size, u64 zero_to) |
| 883 | { |
| 884 | int ret; |
| 885 | u32 clusters_to_add; |
| 886 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 887 | |
| 888 | clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size); |
| 889 | if (clusters_to_add < oi->ip_clusters) |
| 890 | clusters_to_add = 0; |
| 891 | else |
| 892 | clusters_to_add -= oi->ip_clusters; |
| 893 | |
| 894 | if (clusters_to_add) { |
| 895 | ret = __ocfs2_extend_allocation(inode, oi->ip_clusters, |
| 896 | clusters_to_add, 0); |
| 897 | if (ret) { |
| 898 | mlog_errno(ret); |
| 899 | goto out; |
| 900 | } |
| 901 | } |
| 902 | |
| 903 | /* |
| 904 | * Call this even if we don't add any clusters to the tree. We |
| 905 | * still need to zero the area between the old i_size and the |
| 906 | * new i_size. |
| 907 | */ |
| 908 | ret = ocfs2_zero_extend(inode, zero_to); |
| 909 | if (ret < 0) |
| 910 | mlog_errno(ret); |
| 911 | |
| 912 | out: |
| 913 | return ret; |
| 914 | } |
| 915 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 916 | static int ocfs2_extend_file(struct inode *inode, |
| 917 | struct buffer_head *di_bh, |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 918 | u64 new_i_size) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 919 | { |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 920 | int ret = 0, data_locked = 0; |
| 921 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 922 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 923 | BUG_ON(!di_bh); |
Mark Fasheh | 53013cb | 2006-05-05 19:04:03 -0700 | [diff] [blame] | 924 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 925 | /* setattr sometimes calls us like this. */ |
| 926 | if (new_i_size == 0) |
| 927 | goto out; |
| 928 | |
| 929 | if (i_size_read(inode) == new_i_size) |
| 930 | goto out; |
| 931 | BUG_ON(new_i_size < i_size_read(inode)); |
| 932 | |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 933 | /* |
| 934 | * Fall through for converting inline data, even if the fs |
| 935 | * supports sparse files. |
| 936 | * |
| 937 | * The check for inline data here is legal - nobody can add |
| 938 | * the feature since we have i_mutex. We must check it again |
| 939 | * after acquiring ip_alloc_sem though, as paths like mmap |
| 940 | * might have raced us to converting the inode to extents. |
| 941 | */ |
| 942 | if (!(oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) |
| 943 | && ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 944 | goto out_update_size; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 945 | |
Mark Fasheh | 0effef7 | 2006-10-03 17:44:42 -0700 | [diff] [blame] | 946 | /* |
| 947 | * protect the pages that ocfs2_zero_extend is going to be |
| 948 | * pulling into the page cache.. we do this before the |
| 949 | * metadata extend so that we don't get into the situation |
| 950 | * where we've extended the metadata but can't get the data |
| 951 | * lock to zero. |
| 952 | */ |
| 953 | ret = ocfs2_data_lock(inode, 1); |
| 954 | if (ret < 0) { |
| 955 | mlog_errno(ret); |
| 956 | goto out; |
| 957 | } |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 958 | data_locked = 1; |
Mark Fasheh | 53013cb | 2006-05-05 19:04:03 -0700 | [diff] [blame] | 959 | |
Mark Fasheh | 0effef7 | 2006-10-03 17:44:42 -0700 | [diff] [blame] | 960 | /* |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 961 | * The alloc sem blocks people in read/write from reading our |
| 962 | * allocation until we're done changing it. We depend on |
| 963 | * i_mutex to block other extend/truncate calls while we're |
| 964 | * here. |
Mark Fasheh | 0effef7 | 2006-10-03 17:44:42 -0700 | [diff] [blame] | 965 | */ |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 966 | down_write(&oi->ip_alloc_sem); |
| 967 | |
| 968 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 969 | /* |
| 970 | * We can optimize small extends by keeping the inodes |
| 971 | * inline data. |
| 972 | */ |
| 973 | if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) { |
| 974 | up_write(&oi->ip_alloc_sem); |
| 975 | goto out_update_size; |
| 976 | } |
| 977 | |
| 978 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); |
| 979 | if (ret) { |
| 980 | up_write(&oi->ip_alloc_sem); |
| 981 | |
| 982 | mlog_errno(ret); |
| 983 | goto out_unlock; |
| 984 | } |
| 985 | } |
| 986 | |
| 987 | if (!ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) |
| 988 | ret = ocfs2_extend_no_holes(inode, new_i_size, new_i_size); |
| 989 | |
| 990 | up_write(&oi->ip_alloc_sem); |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 991 | |
Mark Fasheh | 0effef7 | 2006-10-03 17:44:42 -0700 | [diff] [blame] | 992 | if (ret < 0) { |
| 993 | mlog_errno(ret); |
| 994 | goto out_unlock; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 995 | } |
| 996 | |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 997 | out_update_size: |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 998 | ret = ocfs2_simple_size_update(inode, di_bh, new_i_size); |
| 999 | if (ret < 0) |
| 1000 | mlog_errno(ret); |
Mark Fasheh | 53013cb | 2006-05-05 19:04:03 -0700 | [diff] [blame] | 1001 | |
| 1002 | out_unlock: |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1003 | if (data_locked) |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 1004 | ocfs2_data_unlock(inode, 1); |
Mark Fasheh | 53013cb | 2006-05-05 19:04:03 -0700 | [diff] [blame] | 1005 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1006 | out: |
| 1007 | return ret; |
| 1008 | } |
| 1009 | |
| 1010 | int ocfs2_setattr(struct dentry *dentry, struct iattr *attr) |
| 1011 | { |
| 1012 | int status = 0, size_change; |
| 1013 | struct inode *inode = dentry->d_inode; |
| 1014 | struct super_block *sb = inode->i_sb; |
| 1015 | struct ocfs2_super *osb = OCFS2_SB(sb); |
| 1016 | struct buffer_head *bh = NULL; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 1017 | handle_t *handle = NULL; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1018 | |
| 1019 | mlog_entry("(0x%p, '%.*s')\n", dentry, |
| 1020 | dentry->d_name.len, dentry->d_name.name); |
| 1021 | |
| 1022 | if (attr->ia_valid & ATTR_MODE) |
| 1023 | mlog(0, "mode change: %d\n", attr->ia_mode); |
| 1024 | if (attr->ia_valid & ATTR_UID) |
| 1025 | mlog(0, "uid change: %d\n", attr->ia_uid); |
| 1026 | if (attr->ia_valid & ATTR_GID) |
| 1027 | mlog(0, "gid change: %d\n", attr->ia_gid); |
| 1028 | if (attr->ia_valid & ATTR_SIZE) |
| 1029 | mlog(0, "size change...\n"); |
| 1030 | if (attr->ia_valid & (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME)) |
| 1031 | mlog(0, "time change...\n"); |
| 1032 | |
| 1033 | #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \ |
| 1034 | | ATTR_GID | ATTR_UID | ATTR_MODE) |
| 1035 | if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) { |
| 1036 | mlog(0, "can't handle attrs: 0x%x\n", attr->ia_valid); |
| 1037 | return 0; |
| 1038 | } |
| 1039 | |
| 1040 | status = inode_change_ok(inode, attr); |
| 1041 | if (status) |
| 1042 | return status; |
| 1043 | |
| 1044 | size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE; |
| 1045 | if (size_change) { |
| 1046 | status = ocfs2_rw_lock(inode, 1); |
| 1047 | if (status < 0) { |
| 1048 | mlog_errno(status); |
| 1049 | goto bail; |
| 1050 | } |
| 1051 | } |
| 1052 | |
Mark Fasheh | 4bcec18 | 2006-10-09 16:02:40 -0700 | [diff] [blame] | 1053 | status = ocfs2_meta_lock(inode, &bh, 1); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1054 | if (status < 0) { |
| 1055 | if (status != -ENOENT) |
| 1056 | mlog_errno(status); |
| 1057 | goto bail_unlock_rw; |
| 1058 | } |
| 1059 | |
| 1060 | if (size_change && attr->ia_size != i_size_read(inode)) { |
Mark Fasheh | ce76fd3 | 2007-07-20 12:02:14 -0700 | [diff] [blame] | 1061 | if (attr->ia_size > sb->s_maxbytes) { |
| 1062 | status = -EFBIG; |
| 1063 | goto bail_unlock; |
| 1064 | } |
| 1065 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1066 | if (i_size_read(inode) > attr->ia_size) |
| 1067 | status = ocfs2_truncate_file(inode, bh, attr->ia_size); |
| 1068 | else |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1069 | status = ocfs2_extend_file(inode, bh, attr->ia_size); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1070 | if (status < 0) { |
| 1071 | if (status != -ENOSPC) |
| 1072 | mlog_errno(status); |
| 1073 | status = -ENOSPC; |
| 1074 | goto bail_unlock; |
| 1075 | } |
| 1076 | } |
| 1077 | |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 1078 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1079 | if (IS_ERR(handle)) { |
| 1080 | status = PTR_ERR(handle); |
| 1081 | mlog_errno(status); |
| 1082 | goto bail_unlock; |
| 1083 | } |
| 1084 | |
Mark Fasheh | 7307de8 | 2007-05-09 15:16:19 -0700 | [diff] [blame] | 1085 | /* |
| 1086 | * This will intentionally not wind up calling vmtruncate(), |
| 1087 | * since all the work for a size change has been done above. |
| 1088 | * Otherwise, we could get into problems with truncate as |
| 1089 | * ip_alloc_sem is used there to protect against i_size |
| 1090 | * changes. |
| 1091 | */ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1092 | status = inode_setattr(inode, attr); |
| 1093 | if (status < 0) { |
| 1094 | mlog_errno(status); |
| 1095 | goto bail_commit; |
| 1096 | } |
| 1097 | |
| 1098 | status = ocfs2_mark_inode_dirty(handle, inode, bh); |
| 1099 | if (status < 0) |
| 1100 | mlog_errno(status); |
| 1101 | |
| 1102 | bail_commit: |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 1103 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1104 | bail_unlock: |
| 1105 | ocfs2_meta_unlock(inode, 1); |
| 1106 | bail_unlock_rw: |
| 1107 | if (size_change) |
| 1108 | ocfs2_rw_unlock(inode, 1); |
| 1109 | bail: |
| 1110 | if (bh) |
| 1111 | brelse(bh); |
| 1112 | |
| 1113 | mlog_exit(status); |
| 1114 | return status; |
| 1115 | } |
| 1116 | |
| 1117 | int ocfs2_getattr(struct vfsmount *mnt, |
| 1118 | struct dentry *dentry, |
| 1119 | struct kstat *stat) |
| 1120 | { |
| 1121 | struct inode *inode = dentry->d_inode; |
| 1122 | struct super_block *sb = dentry->d_inode->i_sb; |
| 1123 | struct ocfs2_super *osb = sb->s_fs_info; |
| 1124 | int err; |
| 1125 | |
| 1126 | mlog_entry_void(); |
| 1127 | |
| 1128 | err = ocfs2_inode_revalidate(dentry); |
| 1129 | if (err) { |
| 1130 | if (err != -ENOENT) |
| 1131 | mlog_errno(err); |
| 1132 | goto bail; |
| 1133 | } |
| 1134 | |
| 1135 | generic_fillattr(inode, stat); |
| 1136 | |
| 1137 | /* We set the blksize from the cluster size for performance */ |
| 1138 | stat->blksize = osb->s_clustersize; |
| 1139 | |
| 1140 | bail: |
| 1141 | mlog_exit(err); |
| 1142 | |
| 1143 | return err; |
| 1144 | } |
| 1145 | |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1146 | int ocfs2_permission(struct inode *inode, int mask, struct nameidata *nd) |
| 1147 | { |
| 1148 | int ret; |
| 1149 | |
| 1150 | mlog_entry_void(); |
| 1151 | |
| 1152 | ret = ocfs2_meta_lock(inode, NULL, 0); |
| 1153 | if (ret) { |
Mark Fasheh | a9f5f70 | 2007-04-26 11:43:43 -0700 | [diff] [blame] | 1154 | if (ret != -ENOENT) |
| 1155 | mlog_errno(ret); |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1156 | goto out; |
| 1157 | } |
| 1158 | |
| 1159 | ret = generic_permission(inode, mask, NULL); |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 1160 | |
| 1161 | ocfs2_meta_unlock(inode, 0); |
| 1162 | out: |
| 1163 | mlog_exit(ret); |
| 1164 | return ret; |
| 1165 | } |
| 1166 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1167 | static int __ocfs2_write_remove_suid(struct inode *inode, |
| 1168 | struct buffer_head *bh) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1169 | { |
| 1170 | int ret; |
Mark Fasheh | 1fabe14 | 2006-10-09 18:11:45 -0700 | [diff] [blame] | 1171 | handle_t *handle; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1172 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1173 | struct ocfs2_dinode *di; |
| 1174 | |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1175 | mlog_entry("(Inode %llu, mode 0%o)\n", |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1176 | (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_mode); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1177 | |
Mark Fasheh | 65eff9c | 2006-10-09 17:26:22 -0700 | [diff] [blame] | 1178 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1179 | if (handle == NULL) { |
| 1180 | ret = -ENOMEM; |
| 1181 | mlog_errno(ret); |
| 1182 | goto out; |
| 1183 | } |
| 1184 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1185 | ret = ocfs2_journal_access(handle, inode, bh, |
| 1186 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 1187 | if (ret < 0) { |
| 1188 | mlog_errno(ret); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1189 | goto out_trans; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1190 | } |
| 1191 | |
| 1192 | inode->i_mode &= ~S_ISUID; |
| 1193 | if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP)) |
| 1194 | inode->i_mode &= ~S_ISGID; |
| 1195 | |
| 1196 | di = (struct ocfs2_dinode *) bh->b_data; |
| 1197 | di->i_mode = cpu_to_le16(inode->i_mode); |
| 1198 | |
| 1199 | ret = ocfs2_journal_dirty(handle, bh); |
| 1200 | if (ret < 0) |
| 1201 | mlog_errno(ret); |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1202 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1203 | out_trans: |
Mark Fasheh | 02dc1af | 2006-10-09 16:48:10 -0700 | [diff] [blame] | 1204 | ocfs2_commit_trans(osb, handle); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1205 | out: |
| 1206 | mlog_exit(ret); |
| 1207 | return ret; |
| 1208 | } |
| 1209 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1210 | /* |
| 1211 | * Will look for holes and unwritten extents in the range starting at |
| 1212 | * pos for count bytes (inclusive). |
| 1213 | */ |
| 1214 | static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos, |
| 1215 | size_t count) |
| 1216 | { |
| 1217 | int ret = 0; |
Mark Fasheh | 49cb8d2 | 2007-03-09 16:21:46 -0800 | [diff] [blame] | 1218 | unsigned int extent_flags; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1219 | u32 cpos, clusters, extent_len, phys_cpos; |
| 1220 | struct super_block *sb = inode->i_sb; |
| 1221 | |
| 1222 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; |
| 1223 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; |
| 1224 | |
| 1225 | while (clusters) { |
Mark Fasheh | 49cb8d2 | 2007-03-09 16:21:46 -0800 | [diff] [blame] | 1226 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, |
| 1227 | &extent_flags); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1228 | if (ret < 0) { |
| 1229 | mlog_errno(ret); |
| 1230 | goto out; |
| 1231 | } |
| 1232 | |
Mark Fasheh | 49cb8d2 | 2007-03-09 16:21:46 -0800 | [diff] [blame] | 1233 | if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) { |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1234 | ret = 1; |
| 1235 | break; |
| 1236 | } |
| 1237 | |
| 1238 | if (extent_len > clusters) |
| 1239 | extent_len = clusters; |
| 1240 | |
| 1241 | clusters -= extent_len; |
| 1242 | cpos += extent_len; |
| 1243 | } |
| 1244 | out: |
| 1245 | return ret; |
| 1246 | } |
| 1247 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1248 | static int ocfs2_write_remove_suid(struct inode *inode) |
| 1249 | { |
| 1250 | int ret; |
| 1251 | struct buffer_head *bh = NULL; |
| 1252 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| 1253 | |
| 1254 | ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), |
| 1255 | oi->ip_blkno, &bh, OCFS2_BH_CACHED, inode); |
| 1256 | if (ret < 0) { |
| 1257 | mlog_errno(ret); |
| 1258 | goto out; |
| 1259 | } |
| 1260 | |
| 1261 | ret = __ocfs2_write_remove_suid(inode, bh); |
| 1262 | out: |
| 1263 | brelse(bh); |
| 1264 | return ret; |
| 1265 | } |
| 1266 | |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 1267 | /* |
| 1268 | * Allocate enough extents to cover the region starting at byte offset |
| 1269 | * start for len bytes. Existing extents are skipped, any extents |
| 1270 | * added are marked as "unwritten". |
| 1271 | */ |
| 1272 | static int ocfs2_allocate_unwritten_extents(struct inode *inode, |
| 1273 | u64 start, u64 len) |
| 1274 | { |
| 1275 | int ret; |
| 1276 | u32 cpos, phys_cpos, clusters, alloc_size; |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1277 | u64 end = start + len; |
| 1278 | struct buffer_head *di_bh = NULL; |
| 1279 | |
| 1280 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 1281 | ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), |
| 1282 | OCFS2_I(inode)->ip_blkno, &di_bh, |
| 1283 | OCFS2_BH_CACHED, inode); |
| 1284 | if (ret) { |
| 1285 | mlog_errno(ret); |
| 1286 | goto out; |
| 1287 | } |
| 1288 | |
| 1289 | /* |
| 1290 | * Nothing to do if the requested reservation range |
| 1291 | * fits within the inode. |
| 1292 | */ |
| 1293 | if (ocfs2_size_fits_inline_data(di_bh, end)) |
| 1294 | goto out; |
| 1295 | |
| 1296 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); |
| 1297 | if (ret) { |
| 1298 | mlog_errno(ret); |
| 1299 | goto out; |
| 1300 | } |
| 1301 | } |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 1302 | |
| 1303 | /* |
| 1304 | * We consider both start and len to be inclusive. |
| 1305 | */ |
| 1306 | cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; |
| 1307 | clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len); |
| 1308 | clusters -= cpos; |
| 1309 | |
| 1310 | while (clusters) { |
| 1311 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, |
| 1312 | &alloc_size, NULL); |
| 1313 | if (ret) { |
| 1314 | mlog_errno(ret); |
| 1315 | goto out; |
| 1316 | } |
| 1317 | |
| 1318 | /* |
| 1319 | * Hole or existing extent len can be arbitrary, so |
| 1320 | * cap it to our own allocation request. |
| 1321 | */ |
| 1322 | if (alloc_size > clusters) |
| 1323 | alloc_size = clusters; |
| 1324 | |
| 1325 | if (phys_cpos) { |
| 1326 | /* |
| 1327 | * We already have an allocation at this |
| 1328 | * region so we can safely skip it. |
| 1329 | */ |
| 1330 | goto next; |
| 1331 | } |
| 1332 | |
| 1333 | ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1); |
| 1334 | if (ret) { |
| 1335 | if (ret != -ENOSPC) |
| 1336 | mlog_errno(ret); |
| 1337 | goto out; |
| 1338 | } |
| 1339 | |
| 1340 | next: |
| 1341 | cpos += alloc_size; |
| 1342 | clusters -= alloc_size; |
| 1343 | } |
| 1344 | |
| 1345 | ret = 0; |
| 1346 | out: |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1347 | |
| 1348 | brelse(di_bh); |
Mark Fasheh | 2ae99a6 | 2007-03-09 16:43:28 -0800 | [diff] [blame] | 1349 | return ret; |
| 1350 | } |
| 1351 | |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1352 | static int __ocfs2_remove_inode_range(struct inode *inode, |
| 1353 | struct buffer_head *di_bh, |
| 1354 | u32 cpos, u32 phys_cpos, u32 len, |
| 1355 | struct ocfs2_cached_dealloc_ctxt *dealloc) |
| 1356 | { |
| 1357 | int ret; |
| 1358 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); |
| 1359 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1360 | struct inode *tl_inode = osb->osb_tl_inode; |
| 1361 | handle_t *handle; |
| 1362 | struct ocfs2_alloc_context *meta_ac = NULL; |
| 1363 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; |
| 1364 | |
| 1365 | ret = ocfs2_lock_allocators(inode, di, 0, 1, NULL, &meta_ac); |
| 1366 | if (ret) { |
| 1367 | mlog_errno(ret); |
| 1368 | return ret; |
| 1369 | } |
| 1370 | |
| 1371 | mutex_lock(&tl_inode->i_mutex); |
| 1372 | |
| 1373 | if (ocfs2_truncate_log_needs_flush(osb)) { |
| 1374 | ret = __ocfs2_flush_truncate_log(osb); |
| 1375 | if (ret < 0) { |
| 1376 | mlog_errno(ret); |
| 1377 | goto out; |
| 1378 | } |
| 1379 | } |
| 1380 | |
| 1381 | handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS); |
| 1382 | if (handle == NULL) { |
| 1383 | ret = -ENOMEM; |
| 1384 | mlog_errno(ret); |
| 1385 | goto out; |
| 1386 | } |
| 1387 | |
| 1388 | ret = ocfs2_journal_access(handle, inode, di_bh, |
| 1389 | OCFS2_JOURNAL_ACCESS_WRITE); |
| 1390 | if (ret) { |
| 1391 | mlog_errno(ret); |
| 1392 | goto out; |
| 1393 | } |
| 1394 | |
| 1395 | ret = ocfs2_remove_extent(inode, di_bh, cpos, len, handle, meta_ac, |
| 1396 | dealloc); |
| 1397 | if (ret) { |
| 1398 | mlog_errno(ret); |
| 1399 | goto out_commit; |
| 1400 | } |
| 1401 | |
| 1402 | OCFS2_I(inode)->ip_clusters -= len; |
| 1403 | di->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters); |
| 1404 | |
| 1405 | ret = ocfs2_journal_dirty(handle, di_bh); |
| 1406 | if (ret) { |
| 1407 | mlog_errno(ret); |
| 1408 | goto out_commit; |
| 1409 | } |
| 1410 | |
| 1411 | ret = ocfs2_truncate_log_append(osb, handle, phys_blkno, len); |
| 1412 | if (ret) |
| 1413 | mlog_errno(ret); |
| 1414 | |
| 1415 | out_commit: |
| 1416 | ocfs2_commit_trans(osb, handle); |
| 1417 | out: |
| 1418 | mutex_unlock(&tl_inode->i_mutex); |
| 1419 | |
| 1420 | if (meta_ac) |
| 1421 | ocfs2_free_alloc_context(meta_ac); |
| 1422 | |
| 1423 | return ret; |
| 1424 | } |
| 1425 | |
| 1426 | /* |
| 1427 | * Truncate a byte range, avoiding pages within partial clusters. This |
| 1428 | * preserves those pages for the zeroing code to write to. |
| 1429 | */ |
| 1430 | static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start, |
| 1431 | u64 byte_len) |
| 1432 | { |
| 1433 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1434 | loff_t start, end; |
| 1435 | struct address_space *mapping = inode->i_mapping; |
| 1436 | |
| 1437 | start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start); |
| 1438 | end = byte_start + byte_len; |
| 1439 | end = end & ~(osb->s_clustersize - 1); |
| 1440 | |
| 1441 | if (start < end) { |
| 1442 | unmap_mapping_range(mapping, start, end - start, 0); |
| 1443 | truncate_inode_pages_range(mapping, start, end - 1); |
| 1444 | } |
| 1445 | } |
| 1446 | |
| 1447 | static int ocfs2_zero_partial_clusters(struct inode *inode, |
| 1448 | u64 start, u64 len) |
| 1449 | { |
| 1450 | int ret = 0; |
| 1451 | u64 tmpend, end = start + len; |
| 1452 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1453 | unsigned int csize = osb->s_clustersize; |
| 1454 | handle_t *handle; |
| 1455 | |
| 1456 | /* |
| 1457 | * The "start" and "end" values are NOT necessarily part of |
| 1458 | * the range whose allocation is being deleted. Rather, this |
| 1459 | * is what the user passed in with the request. We must zero |
| 1460 | * partial clusters here. There's no need to worry about |
| 1461 | * physical allocation - the zeroing code knows to skip holes. |
| 1462 | */ |
| 1463 | mlog(0, "byte start: %llu, end: %llu\n", |
| 1464 | (unsigned long long)start, (unsigned long long)end); |
| 1465 | |
| 1466 | /* |
| 1467 | * If both edges are on a cluster boundary then there's no |
| 1468 | * zeroing required as the region is part of the allocation to |
| 1469 | * be truncated. |
| 1470 | */ |
| 1471 | if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0) |
| 1472 | goto out; |
| 1473 | |
| 1474 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
| 1475 | if (handle == NULL) { |
| 1476 | ret = -ENOMEM; |
| 1477 | mlog_errno(ret); |
| 1478 | goto out; |
| 1479 | } |
| 1480 | |
| 1481 | /* |
| 1482 | * We want to get the byte offset of the end of the 1st cluster. |
| 1483 | */ |
| 1484 | tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1)); |
| 1485 | if (tmpend > end) |
| 1486 | tmpend = end; |
| 1487 | |
| 1488 | mlog(0, "1st range: start: %llu, tmpend: %llu\n", |
| 1489 | (unsigned long long)start, (unsigned long long)tmpend); |
| 1490 | |
| 1491 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend); |
| 1492 | if (ret) |
| 1493 | mlog_errno(ret); |
| 1494 | |
| 1495 | if (tmpend < end) { |
| 1496 | /* |
| 1497 | * This may make start and end equal, but the zeroing |
| 1498 | * code will skip any work in that case so there's no |
| 1499 | * need to catch it up here. |
| 1500 | */ |
| 1501 | start = end & ~(osb->s_clustersize - 1); |
| 1502 | |
| 1503 | mlog(0, "2nd range: start: %llu, end: %llu\n", |
| 1504 | (unsigned long long)start, (unsigned long long)end); |
| 1505 | |
| 1506 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, end); |
| 1507 | if (ret) |
| 1508 | mlog_errno(ret); |
| 1509 | } |
| 1510 | |
| 1511 | ocfs2_commit_trans(osb, handle); |
| 1512 | out: |
| 1513 | return ret; |
| 1514 | } |
| 1515 | |
| 1516 | static int ocfs2_remove_inode_range(struct inode *inode, |
| 1517 | struct buffer_head *di_bh, u64 byte_start, |
| 1518 | u64 byte_len) |
| 1519 | { |
| 1520 | int ret = 0; |
| 1521 | u32 trunc_start, trunc_len, cpos, phys_cpos, alloc_size; |
| 1522 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1523 | struct ocfs2_cached_dealloc_ctxt dealloc; |
| 1524 | |
| 1525 | ocfs2_init_dealloc_ctxt(&dealloc); |
| 1526 | |
| 1527 | if (byte_len == 0) |
| 1528 | return 0; |
| 1529 | |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1530 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 1531 | ret = ocfs2_truncate_inline(inode, di_bh, byte_start, |
| 1532 | byte_start + byte_len, 1); |
| 1533 | if (ret) |
| 1534 | mlog_errno(ret); |
| 1535 | return ret; |
| 1536 | } |
| 1537 | |
Mark Fasheh | 063c456 | 2007-07-03 13:34:11 -0700 | [diff] [blame] | 1538 | trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start); |
| 1539 | trunc_len = (byte_start + byte_len) >> osb->s_clustersize_bits; |
| 1540 | if (trunc_len >= trunc_start) |
| 1541 | trunc_len -= trunc_start; |
| 1542 | else |
| 1543 | trunc_len = 0; |
| 1544 | |
| 1545 | mlog(0, "Inode: %llu, start: %llu, len: %llu, cstart: %u, clen: %u\n", |
| 1546 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
| 1547 | (unsigned long long)byte_start, |
| 1548 | (unsigned long long)byte_len, trunc_start, trunc_len); |
| 1549 | |
| 1550 | ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len); |
| 1551 | if (ret) { |
| 1552 | mlog_errno(ret); |
| 1553 | goto out; |
| 1554 | } |
| 1555 | |
| 1556 | cpos = trunc_start; |
| 1557 | while (trunc_len) { |
| 1558 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, |
| 1559 | &alloc_size, NULL); |
| 1560 | if (ret) { |
| 1561 | mlog_errno(ret); |
| 1562 | goto out; |
| 1563 | } |
| 1564 | |
| 1565 | if (alloc_size > trunc_len) |
| 1566 | alloc_size = trunc_len; |
| 1567 | |
| 1568 | /* Only do work for non-holes */ |
| 1569 | if (phys_cpos != 0) { |
| 1570 | ret = __ocfs2_remove_inode_range(inode, di_bh, cpos, |
| 1571 | phys_cpos, alloc_size, |
| 1572 | &dealloc); |
| 1573 | if (ret) { |
| 1574 | mlog_errno(ret); |
| 1575 | goto out; |
| 1576 | } |
| 1577 | } |
| 1578 | |
| 1579 | cpos += alloc_size; |
| 1580 | trunc_len -= alloc_size; |
| 1581 | } |
| 1582 | |
| 1583 | ocfs2_truncate_cluster_pages(inode, byte_start, byte_len); |
| 1584 | |
| 1585 | out: |
| 1586 | ocfs2_schedule_truncate_log_flush(osb, 1); |
| 1587 | ocfs2_run_deallocs(osb, &dealloc); |
| 1588 | |
| 1589 | return ret; |
| 1590 | } |
| 1591 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1592 | /* |
| 1593 | * Parts of this function taken from xfs_change_file_space() |
| 1594 | */ |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1595 | static int __ocfs2_change_file_space(struct file *file, struct inode *inode, |
| 1596 | loff_t f_pos, unsigned int cmd, |
| 1597 | struct ocfs2_space_resv *sr, |
| 1598 | int change_size) |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1599 | { |
| 1600 | int ret; |
| 1601 | s64 llen; |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1602 | loff_t size; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1603 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1604 | struct buffer_head *di_bh = NULL; |
| 1605 | handle_t *handle; |
Mark Fasheh | a00cce3 | 2007-07-20 11:28:30 -0700 | [diff] [blame] | 1606 | unsigned long long max_off = inode->i_sb->s_maxbytes; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1607 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1608 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
| 1609 | return -EROFS; |
| 1610 | |
| 1611 | mutex_lock(&inode->i_mutex); |
| 1612 | |
| 1613 | /* |
| 1614 | * This prevents concurrent writes on other nodes |
| 1615 | */ |
| 1616 | ret = ocfs2_rw_lock(inode, 1); |
| 1617 | if (ret) { |
| 1618 | mlog_errno(ret); |
| 1619 | goto out; |
| 1620 | } |
| 1621 | |
| 1622 | ret = ocfs2_meta_lock(inode, &di_bh, 1); |
| 1623 | if (ret) { |
| 1624 | mlog_errno(ret); |
| 1625 | goto out_rw_unlock; |
| 1626 | } |
| 1627 | |
| 1628 | if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) { |
| 1629 | ret = -EPERM; |
| 1630 | goto out_meta_unlock; |
| 1631 | } |
| 1632 | |
| 1633 | switch (sr->l_whence) { |
| 1634 | case 0: /*SEEK_SET*/ |
| 1635 | break; |
| 1636 | case 1: /*SEEK_CUR*/ |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1637 | sr->l_start += f_pos; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1638 | break; |
| 1639 | case 2: /*SEEK_END*/ |
| 1640 | sr->l_start += i_size_read(inode); |
| 1641 | break; |
| 1642 | default: |
| 1643 | ret = -EINVAL; |
| 1644 | goto out_meta_unlock; |
| 1645 | } |
| 1646 | sr->l_whence = 0; |
| 1647 | |
| 1648 | llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len; |
| 1649 | |
| 1650 | if (sr->l_start < 0 |
| 1651 | || sr->l_start > max_off |
| 1652 | || (sr->l_start + llen) < 0 |
| 1653 | || (sr->l_start + llen) > max_off) { |
| 1654 | ret = -EINVAL; |
| 1655 | goto out_meta_unlock; |
| 1656 | } |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1657 | size = sr->l_start + sr->l_len; |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1658 | |
| 1659 | if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) { |
| 1660 | if (sr->l_len <= 0) { |
| 1661 | ret = -EINVAL; |
| 1662 | goto out_meta_unlock; |
| 1663 | } |
| 1664 | } |
| 1665 | |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1666 | if (file && should_remove_suid(file->f_path.dentry)) { |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1667 | ret = __ocfs2_write_remove_suid(inode, di_bh); |
| 1668 | if (ret) { |
| 1669 | mlog_errno(ret); |
| 1670 | goto out_meta_unlock; |
| 1671 | } |
| 1672 | } |
| 1673 | |
| 1674 | down_write(&OCFS2_I(inode)->ip_alloc_sem); |
| 1675 | switch (cmd) { |
| 1676 | case OCFS2_IOC_RESVSP: |
| 1677 | case OCFS2_IOC_RESVSP64: |
| 1678 | /* |
| 1679 | * This takes unsigned offsets, but the signed ones we |
| 1680 | * pass have been checked against overflow above. |
| 1681 | */ |
| 1682 | ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start, |
| 1683 | sr->l_len); |
| 1684 | break; |
| 1685 | case OCFS2_IOC_UNRESVSP: |
| 1686 | case OCFS2_IOC_UNRESVSP64: |
| 1687 | ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start, |
| 1688 | sr->l_len); |
| 1689 | break; |
| 1690 | default: |
| 1691 | ret = -EINVAL; |
| 1692 | } |
| 1693 | up_write(&OCFS2_I(inode)->ip_alloc_sem); |
| 1694 | if (ret) { |
| 1695 | mlog_errno(ret); |
| 1696 | goto out_meta_unlock; |
| 1697 | } |
| 1698 | |
| 1699 | /* |
| 1700 | * We update c/mtime for these changes |
| 1701 | */ |
| 1702 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
| 1703 | if (IS_ERR(handle)) { |
| 1704 | ret = PTR_ERR(handle); |
| 1705 | mlog_errno(ret); |
| 1706 | goto out_meta_unlock; |
| 1707 | } |
| 1708 | |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1709 | if (change_size && i_size_read(inode) < size) |
| 1710 | i_size_write(inode, size); |
| 1711 | |
Mark Fasheh | b258010 | 2007-03-09 16:53:21 -0800 | [diff] [blame] | 1712 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
| 1713 | ret = ocfs2_mark_inode_dirty(handle, inode, di_bh); |
| 1714 | if (ret < 0) |
| 1715 | mlog_errno(ret); |
| 1716 | |
| 1717 | ocfs2_commit_trans(osb, handle); |
| 1718 | |
| 1719 | out_meta_unlock: |
| 1720 | brelse(di_bh); |
| 1721 | ocfs2_meta_unlock(inode, 1); |
| 1722 | out_rw_unlock: |
| 1723 | ocfs2_rw_unlock(inode, 1); |
| 1724 | |
| 1725 | mutex_unlock(&inode->i_mutex); |
| 1726 | out: |
| 1727 | return ret; |
| 1728 | } |
| 1729 | |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 1730 | int ocfs2_change_file_space(struct file *file, unsigned int cmd, |
| 1731 | struct ocfs2_space_resv *sr) |
| 1732 | { |
| 1733 | struct inode *inode = file->f_path.dentry->d_inode; |
| 1734 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);; |
| 1735 | |
| 1736 | if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) && |
| 1737 | !ocfs2_writes_unwritten_extents(osb)) |
| 1738 | return -ENOTTY; |
| 1739 | else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) && |
| 1740 | !ocfs2_sparse_alloc(osb)) |
| 1741 | return -ENOTTY; |
| 1742 | |
| 1743 | if (!S_ISREG(inode->i_mode)) |
| 1744 | return -EINVAL; |
| 1745 | |
| 1746 | if (!(file->f_mode & FMODE_WRITE)) |
| 1747 | return -EBADF; |
| 1748 | |
| 1749 | return __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0); |
| 1750 | } |
| 1751 | |
| 1752 | static long ocfs2_fallocate(struct inode *inode, int mode, loff_t offset, |
| 1753 | loff_t len) |
| 1754 | { |
| 1755 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 1756 | struct ocfs2_space_resv sr; |
| 1757 | int change_size = 1; |
| 1758 | |
| 1759 | if (!ocfs2_writes_unwritten_extents(osb)) |
| 1760 | return -EOPNOTSUPP; |
| 1761 | |
| 1762 | if (S_ISDIR(inode->i_mode)) |
| 1763 | return -ENODEV; |
| 1764 | |
| 1765 | if (mode & FALLOC_FL_KEEP_SIZE) |
| 1766 | change_size = 0; |
| 1767 | |
| 1768 | sr.l_whence = 0; |
| 1769 | sr.l_start = (s64)offset; |
| 1770 | sr.l_len = (s64)len; |
| 1771 | |
| 1772 | return __ocfs2_change_file_space(NULL, inode, offset, |
| 1773 | OCFS2_IOC_RESVSP64, &sr, change_size); |
| 1774 | } |
| 1775 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1776 | static int ocfs2_prepare_inode_for_write(struct dentry *dentry, |
| 1777 | loff_t *ppos, |
| 1778 | size_t count, |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1779 | int appending, |
| 1780 | int *direct_io) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1781 | { |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1782 | int ret = 0, meta_level = 0; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1783 | struct inode *inode = dentry->d_inode; |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1784 | loff_t saved_pos, end; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1785 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1786 | /* |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1787 | * We start with a read level meta lock and only jump to an ex |
| 1788 | * if we need to make modifications here. |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1789 | */ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1790 | for(;;) { |
Mark Fasheh | 4bcec18 | 2006-10-09 16:02:40 -0700 | [diff] [blame] | 1791 | ret = ocfs2_meta_lock(inode, NULL, meta_level); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1792 | if (ret < 0) { |
| 1793 | meta_level = -1; |
| 1794 | mlog_errno(ret); |
| 1795 | goto out; |
| 1796 | } |
| 1797 | |
| 1798 | /* Clear suid / sgid if necessary. We do this here |
| 1799 | * instead of later in the write path because |
| 1800 | * remove_suid() calls ->setattr without any hint that |
| 1801 | * we may have already done our cluster locking. Since |
| 1802 | * ocfs2_setattr() *must* take cluster locks to |
| 1803 | * proceeed, this will lead us to recursively lock the |
| 1804 | * inode. There's also the dinode i_size state which |
| 1805 | * can be lost via setattr during extending writes (we |
| 1806 | * set inode->i_size at the end of a write. */ |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1807 | if (should_remove_suid(dentry)) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1808 | if (meta_level == 0) { |
| 1809 | ocfs2_meta_unlock(inode, meta_level); |
| 1810 | meta_level = 1; |
| 1811 | continue; |
| 1812 | } |
| 1813 | |
| 1814 | ret = ocfs2_write_remove_suid(inode); |
| 1815 | if (ret < 0) { |
| 1816 | mlog_errno(ret); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1817 | goto out_unlock; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1818 | } |
| 1819 | } |
| 1820 | |
| 1821 | /* work on a copy of ppos until we're sure that we won't have |
| 1822 | * to recalculate it due to relocking. */ |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1823 | if (appending) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1824 | saved_pos = i_size_read(inode); |
| 1825 | mlog(0, "O_APPEND: inode->i_size=%llu\n", saved_pos); |
| 1826 | } else { |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1827 | saved_pos = *ppos; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1828 | } |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 1829 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1830 | end = saved_pos + count; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1831 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1832 | /* |
| 1833 | * Skip the O_DIRECT checks if we don't need |
| 1834 | * them. |
| 1835 | */ |
| 1836 | if (!direct_io || !(*direct_io)) |
| 1837 | break; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1838 | |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1839 | /* |
Mark Fasheh | 1afc32b | 2007-09-07 14:46:51 -0700 | [diff] [blame] | 1840 | * There's no sane way to do direct writes to an inode |
| 1841 | * with inline data. |
| 1842 | */ |
| 1843 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| 1844 | *direct_io = 0; |
| 1845 | break; |
| 1846 | } |
| 1847 | |
| 1848 | /* |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1849 | * Allowing concurrent direct writes means |
| 1850 | * i_size changes wouldn't be synchronized, so |
| 1851 | * one node could wind up truncating another |
| 1852 | * nodes writes. |
| 1853 | */ |
| 1854 | if (end > i_size_read(inode)) { |
| 1855 | *direct_io = 0; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1856 | break; |
| 1857 | } |
| 1858 | |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 1859 | /* |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1860 | * We don't fill holes during direct io, so |
| 1861 | * check for them here. If any are found, the |
| 1862 | * caller will have to retake some cluster |
| 1863 | * locks and initiate the io as buffered. |
Mark Fasheh | 3a0782d | 2007-01-17 12:53:31 -0800 | [diff] [blame] | 1864 | */ |
Mark Fasheh | 65ed39d | 2007-08-28 17:13:23 -0700 | [diff] [blame] | 1865 | ret = ocfs2_check_range_for_holes(inode, saved_pos, count); |
| 1866 | if (ret == 1) { |
| 1867 | *direct_io = 0; |
| 1868 | ret = 0; |
| 1869 | } else if (ret < 0) |
| 1870 | mlog_errno(ret); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1871 | break; |
| 1872 | } |
| 1873 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1874 | if (appending) |
| 1875 | *ppos = saved_pos; |
| 1876 | |
| 1877 | out_unlock: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1878 | ocfs2_meta_unlock(inode, meta_level); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1879 | |
| 1880 | out: |
| 1881 | return ret; |
| 1882 | } |
| 1883 | |
| 1884 | static ssize_t ocfs2_file_aio_write(struct kiocb *iocb, |
| 1885 | const struct iovec *iov, |
| 1886 | unsigned long nr_segs, |
| 1887 | loff_t pos) |
| 1888 | { |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1889 | int ret, direct_io, appending, rw_level, have_alloc_sem = 0; |
Nick Piggin | b6af1bc | 2007-10-16 01:25:24 -0700 | [diff] [blame] | 1890 | int can_do_direct; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1891 | ssize_t written = 0; |
| 1892 | size_t ocount; /* original count */ |
| 1893 | size_t count; /* after file limit checks */ |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame^] | 1894 | loff_t old_size, *ppos = &iocb->ki_pos; |
| 1895 | u32 old_clusters; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1896 | struct file *file = iocb->ki_filp; |
| 1897 | struct inode *inode = file->f_path.dentry->d_inode; |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame^] | 1898 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1899 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1900 | mlog_entry("(0x%p, %u, '%.*s')\n", file, |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1901 | (unsigned int)nr_segs, |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1902 | file->f_path.dentry->d_name.len, |
| 1903 | file->f_path.dentry->d_name.name); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1904 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1905 | if (iocb->ki_left == 0) |
| 1906 | return 0; |
| 1907 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1908 | vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE); |
| 1909 | |
| 1910 | appending = file->f_flags & O_APPEND ? 1 : 0; |
| 1911 | direct_io = file->f_flags & O_DIRECT ? 1 : 0; |
| 1912 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1913 | mutex_lock(&inode->i_mutex); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1914 | |
| 1915 | relock: |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1916 | /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */ |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1917 | if (direct_io) { |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1918 | down_read(&inode->i_alloc_sem); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1919 | have_alloc_sem = 1; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1920 | } |
| 1921 | |
| 1922 | /* concurrent O_DIRECT writes are allowed */ |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1923 | rw_level = !direct_io; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1924 | ret = ocfs2_rw_lock(inode, rw_level); |
| 1925 | if (ret < 0) { |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1926 | mlog_errno(ret); |
| 1927 | goto out_sems; |
| 1928 | } |
| 1929 | |
| 1930 | can_do_direct = direct_io; |
| 1931 | ret = ocfs2_prepare_inode_for_write(file->f_path.dentry, ppos, |
| 1932 | iocb->ki_left, appending, |
| 1933 | &can_do_direct); |
| 1934 | if (ret < 0) { |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1935 | mlog_errno(ret); |
| 1936 | goto out; |
| 1937 | } |
| 1938 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1939 | /* |
| 1940 | * We can't complete the direct I/O as requested, fall back to |
| 1941 | * buffered I/O. |
| 1942 | */ |
| 1943 | if (direct_io && !can_do_direct) { |
| 1944 | ocfs2_rw_unlock(inode, rw_level); |
| 1945 | up_read(&inode->i_alloc_sem); |
| 1946 | |
| 1947 | have_alloc_sem = 0; |
| 1948 | rw_level = -1; |
| 1949 | |
| 1950 | direct_io = 0; |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1951 | goto relock; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 1952 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1953 | |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame^] | 1954 | /* |
| 1955 | * To later detect whether a journal commit for sync writes is |
| 1956 | * necessary, we sample i_size, and cluster count here. |
| 1957 | */ |
| 1958 | old_size = i_size_read(inode); |
| 1959 | old_clusters = OCFS2_I(inode)->ip_clusters; |
| 1960 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1961 | /* communicate with ocfs2_dio_end_io */ |
Mark Fasheh | 7cdfc3a | 2007-04-16 17:28:51 -0700 | [diff] [blame] | 1962 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1963 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1964 | if (direct_io) { |
Nick Piggin | b6af1bc | 2007-10-16 01:25:24 -0700 | [diff] [blame] | 1965 | ret = generic_segment_checks(iov, &nr_segs, &ocount, |
| 1966 | VERIFY_READ); |
| 1967 | if (ret) |
| 1968 | goto out_dio; |
| 1969 | |
| 1970 | ret = generic_write_checks(file, ppos, &count, |
| 1971 | S_ISBLK(inode->i_mode)); |
| 1972 | if (ret) |
| 1973 | goto out_dio; |
| 1974 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1975 | written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos, |
| 1976 | ppos, count, ocount); |
| 1977 | if (written < 0) { |
| 1978 | ret = written; |
| 1979 | goto out_dio; |
| 1980 | } |
| 1981 | } else { |
Nick Piggin | b6af1bc | 2007-10-16 01:25:24 -0700 | [diff] [blame] | 1982 | written = generic_file_aio_write_nolock(iocb, iov, nr_segs, |
| 1983 | *ppos); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1984 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1985 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1986 | out_dio: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1987 | /* buffered aio wouldn't have proper lock coverage today */ |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 1988 | BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1989 | |
Mark Fasheh | 9ea2d32 | 2007-10-18 14:14:45 -0700 | [diff] [blame^] | 1990 | if ((file->f_flags & O_SYNC && !direct_io) || IS_SYNC(inode)) { |
| 1991 | /* |
| 1992 | * The generic write paths have handled getting data |
| 1993 | * to disk, but since we don't make use of the dirty |
| 1994 | * inode list, a manual journal commit is necessary |
| 1995 | * here. |
| 1996 | */ |
| 1997 | if (old_size != i_size_read(inode) || |
| 1998 | old_clusters != OCFS2_I(inode)->ip_clusters) { |
| 1999 | ret = journal_force_commit(osb->journal->j_journal); |
| 2000 | if (ret < 0) |
| 2001 | written = ret; |
| 2002 | } |
| 2003 | } |
| 2004 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2005 | /* |
| 2006 | * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io |
| 2007 | * function pointer which is called when o_direct io completes so that |
| 2008 | * it can unlock our rw lock. (it's the clustered equivalent of |
| 2009 | * i_alloc_sem; protects truncate from racing with pending ios). |
| 2010 | * Unfortunately there are error cases which call end_io and others |
| 2011 | * that don't. so we don't have to unlock the rw_lock if either an |
| 2012 | * async dio is going to do it in the future or an end_io after an |
| 2013 | * error has already done it. |
| 2014 | */ |
| 2015 | if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) { |
| 2016 | rw_level = -1; |
| 2017 | have_alloc_sem = 0; |
| 2018 | } |
| 2019 | |
| 2020 | out: |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2021 | if (rw_level != -1) |
| 2022 | ocfs2_rw_unlock(inode, rw_level); |
| 2023 | |
| 2024 | out_sems: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2025 | if (have_alloc_sem) |
| 2026 | up_read(&inode->i_alloc_sem); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2027 | |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 2028 | mutex_unlock(&inode->i_mutex); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2029 | |
| 2030 | mlog_exit(ret); |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2031 | return written ? written : ret; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2032 | } |
| 2033 | |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2034 | static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe, |
| 2035 | struct file *out, |
| 2036 | loff_t *ppos, |
| 2037 | size_t len, |
| 2038 | unsigned int flags) |
| 2039 | { |
| 2040 | int ret; |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 2041 | struct inode *inode = out->f_path.dentry->d_inode; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2042 | |
| 2043 | mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", out, pipe, |
| 2044 | (unsigned int)len, |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 2045 | out->f_path.dentry->d_name.len, |
| 2046 | out->f_path.dentry->d_name.name); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2047 | |
| 2048 | inode_double_lock(inode, pipe->inode); |
| 2049 | |
| 2050 | ret = ocfs2_rw_lock(inode, 1); |
| 2051 | if (ret < 0) { |
| 2052 | mlog_errno(ret); |
| 2053 | goto out; |
| 2054 | } |
| 2055 | |
Mark Fasheh | 9517bac | 2007-02-09 20:24:12 -0800 | [diff] [blame] | 2056 | ret = ocfs2_prepare_inode_for_write(out->f_path.dentry, ppos, len, 0, |
| 2057 | NULL); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2058 | if (ret < 0) { |
| 2059 | mlog_errno(ret); |
| 2060 | goto out_unlock; |
| 2061 | } |
| 2062 | |
Nick Piggin | b6af1bc | 2007-10-16 01:25:24 -0700 | [diff] [blame] | 2063 | ret = generic_file_splice_write_nolock(pipe, out, ppos, len, flags); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2064 | |
| 2065 | out_unlock: |
| 2066 | ocfs2_rw_unlock(inode, 1); |
| 2067 | out: |
| 2068 | inode_double_unlock(inode, pipe->inode); |
| 2069 | |
| 2070 | mlog_exit(ret); |
| 2071 | return ret; |
| 2072 | } |
| 2073 | |
| 2074 | static ssize_t ocfs2_file_splice_read(struct file *in, |
| 2075 | loff_t *ppos, |
| 2076 | struct pipe_inode_info *pipe, |
| 2077 | size_t len, |
| 2078 | unsigned int flags) |
| 2079 | { |
| 2080 | int ret = 0; |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 2081 | struct inode *inode = in->f_path.dentry->d_inode; |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2082 | |
| 2083 | mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", in, pipe, |
| 2084 | (unsigned int)len, |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 2085 | in->f_path.dentry->d_name.len, |
| 2086 | in->f_path.dentry->d_name.name); |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2087 | |
| 2088 | /* |
| 2089 | * See the comment in ocfs2_file_aio_read() |
| 2090 | */ |
| 2091 | ret = ocfs2_meta_lock(inode, NULL, 0); |
| 2092 | if (ret < 0) { |
| 2093 | mlog_errno(ret); |
| 2094 | goto bail; |
| 2095 | } |
| 2096 | ocfs2_meta_unlock(inode, 0); |
| 2097 | |
| 2098 | ret = generic_file_splice_read(in, ppos, pipe, len, flags); |
| 2099 | |
| 2100 | bail: |
| 2101 | mlog_exit(ret); |
| 2102 | return ret; |
| 2103 | } |
| 2104 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2105 | static ssize_t ocfs2_file_aio_read(struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 2106 | const struct iovec *iov, |
| 2107 | unsigned long nr_segs, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2108 | loff_t pos) |
| 2109 | { |
Tiger Yang | 25899de | 2006-11-15 15:49:02 +0800 | [diff] [blame] | 2110 | int ret = 0, rw_level = -1, have_alloc_sem = 0, lock_level = 0; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2111 | struct file *filp = iocb->ki_filp; |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 2112 | struct inode *inode = filp->f_path.dentry->d_inode; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2113 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 2114 | mlog_entry("(0x%p, %u, '%.*s')\n", filp, |
| 2115 | (unsigned int)nr_segs, |
Josef Sipek | d28c917 | 2006-12-08 02:37:25 -0800 | [diff] [blame] | 2116 | filp->f_path.dentry->d_name.len, |
| 2117 | filp->f_path.dentry->d_name.name); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2118 | |
| 2119 | if (!inode) { |
| 2120 | ret = -EINVAL; |
| 2121 | mlog_errno(ret); |
| 2122 | goto bail; |
| 2123 | } |
| 2124 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2125 | /* |
| 2126 | * buffered reads protect themselves in ->readpage(). O_DIRECT reads |
| 2127 | * need locks to protect pending reads from racing with truncate. |
| 2128 | */ |
| 2129 | if (filp->f_flags & O_DIRECT) { |
| 2130 | down_read(&inode->i_alloc_sem); |
| 2131 | have_alloc_sem = 1; |
| 2132 | |
| 2133 | ret = ocfs2_rw_lock(inode, 0); |
| 2134 | if (ret < 0) { |
| 2135 | mlog_errno(ret); |
| 2136 | goto bail; |
| 2137 | } |
| 2138 | rw_level = 0; |
| 2139 | /* communicate with ocfs2_dio_end_io */ |
Mark Fasheh | 7cdfc3a | 2007-04-16 17:28:51 -0700 | [diff] [blame] | 2140 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2141 | } |
| 2142 | |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2143 | /* |
| 2144 | * We're fine letting folks race truncates and extending |
| 2145 | * writes with read across the cluster, just like they can |
| 2146 | * locally. Hence no rw_lock during read. |
| 2147 | * |
| 2148 | * Take and drop the meta data lock to update inode fields |
| 2149 | * like i_size. This allows the checks down below |
| 2150 | * generic_file_aio_read() a chance of actually working. |
| 2151 | */ |
Tiger Yang | 25899de | 2006-11-15 15:49:02 +0800 | [diff] [blame] | 2152 | ret = ocfs2_meta_lock_atime(inode, filp->f_vfsmnt, &lock_level); |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2153 | if (ret < 0) { |
| 2154 | mlog_errno(ret); |
| 2155 | goto bail; |
| 2156 | } |
Tiger Yang | 25899de | 2006-11-15 15:49:02 +0800 | [diff] [blame] | 2157 | ocfs2_meta_unlock(inode, lock_level); |
Mark Fasheh | c4374f8 | 2006-05-05 19:04:35 -0700 | [diff] [blame] | 2158 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 2159 | ret = generic_file_aio_read(iocb, iov, nr_segs, iocb->ki_pos); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2160 | if (ret == -EINVAL) |
| 2161 | mlog(ML_ERROR, "generic_file_aio_read returned -EINVAL\n"); |
| 2162 | |
| 2163 | /* buffered aio wouldn't have proper lock coverage today */ |
| 2164 | BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT)); |
| 2165 | |
| 2166 | /* see ocfs2_file_aio_write */ |
| 2167 | if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) { |
| 2168 | rw_level = -1; |
| 2169 | have_alloc_sem = 0; |
| 2170 | } |
| 2171 | |
| 2172 | bail: |
| 2173 | if (have_alloc_sem) |
| 2174 | up_read(&inode->i_alloc_sem); |
| 2175 | if (rw_level != -1) |
| 2176 | ocfs2_rw_unlock(inode, rw_level); |
| 2177 | mlog_exit(ret); |
| 2178 | |
| 2179 | return ret; |
| 2180 | } |
| 2181 | |
Arjan van de Ven | 92e1d5b | 2007-02-12 00:55:39 -0800 | [diff] [blame] | 2182 | const struct inode_operations ocfs2_file_iops = { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2183 | .setattr = ocfs2_setattr, |
| 2184 | .getattr = ocfs2_getattr, |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 2185 | .permission = ocfs2_permission, |
Mark Fasheh | 385820a | 2007-07-19 00:14:38 -0700 | [diff] [blame] | 2186 | .fallocate = ocfs2_fallocate, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2187 | }; |
| 2188 | |
Arjan van de Ven | 92e1d5b | 2007-02-12 00:55:39 -0800 | [diff] [blame] | 2189 | const struct inode_operations ocfs2_special_file_iops = { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2190 | .setattr = ocfs2_setattr, |
| 2191 | .getattr = ocfs2_getattr, |
Tiger Yang | d38eb8d | 2006-11-27 09:59:21 +0800 | [diff] [blame] | 2192 | .permission = ocfs2_permission, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2193 | }; |
| 2194 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 2195 | const struct file_operations ocfs2_fops = { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2196 | .read = do_sync_read, |
| 2197 | .write = do_sync_write, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2198 | .mmap = ocfs2_mmap, |
| 2199 | .fsync = ocfs2_sync_file, |
| 2200 | .release = ocfs2_file_release, |
| 2201 | .open = ocfs2_file_open, |
| 2202 | .aio_read = ocfs2_file_aio_read, |
| 2203 | .aio_write = ocfs2_file_aio_write, |
Herbert Poetzl | ca4d147 | 2006-07-03 17:27:12 -0700 | [diff] [blame] | 2204 | .ioctl = ocfs2_ioctl, |
Mark Fasheh | 586d232 | 2007-03-09 15:56:28 -0800 | [diff] [blame] | 2205 | #ifdef CONFIG_COMPAT |
| 2206 | .compat_ioctl = ocfs2_compat_ioctl, |
| 2207 | #endif |
Tiger Yang | 8659ac2 | 2006-10-17 18:29:52 -0700 | [diff] [blame] | 2208 | .splice_read = ocfs2_file_splice_read, |
| 2209 | .splice_write = ocfs2_file_splice_write, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2210 | }; |
| 2211 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 2212 | const struct file_operations ocfs2_dops = { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2213 | .read = generic_read_dir, |
| 2214 | .readdir = ocfs2_readdir, |
| 2215 | .fsync = ocfs2_sync_file, |
Herbert Poetzl | ca4d147 | 2006-07-03 17:27:12 -0700 | [diff] [blame] | 2216 | .ioctl = ocfs2_ioctl, |
Mark Fasheh | 586d232 | 2007-03-09 15:56:28 -0800 | [diff] [blame] | 2217 | #ifdef CONFIG_COMPAT |
| 2218 | .compat_ioctl = ocfs2_compat_ioctl, |
| 2219 | #endif |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 2220 | }; |