1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #include "xfs.h" 7 #include "xfs_fs.h" 8 #include "xfs_shared.h" 9 #include "xfs_format.h" 10 #include "xfs_log_format.h" 11 #include "xfs_trans_resv.h" 12 #include "xfs_mount.h" 13 #include "xfs_inode.h" 14 #include "xfs_btree.h" 15 #include "xfs_ialloc.h" 16 #include "xfs_ialloc_btree.h" 17 #include "xfs_iwalk.h" 18 #include "xfs_itable.h" 19 #include "xfs_error.h" 20 #include "xfs_icache.h" 21 #include "xfs_health.h" 22 23 /* 24 * Bulk Stat 25 * ========= 26 * 27 * Use the inode walking functions to fill out struct xfs_bulkstat for every 28 * allocated inode, then pass the stat information to some externally provided 29 * iteration function. 30 */ 31 32 struct xfs_bstat_chunk { 33 bulkstat_one_fmt_pf formatter; 34 struct xfs_ibulk *breq; 35 struct xfs_bulkstat *buf; 36 }; 37 38 /* 39 * Fill out the bulkstat info for a single inode and report it somewhere. 40 * 41 * bc->breq->lastino is effectively the inode cursor as we walk through the 42 * filesystem. Therefore, we update it any time we need to move the cursor 43 * forward, regardless of whether or not we're sending any bstat information 44 * back to userspace. If the inode is internal metadata or, has been freed 45 * out from under us, we just simply keep going. 46 * 47 * However, if any other type of error happens we want to stop right where we 48 * are so that userspace will call back with exact number of the bad inode and 49 * we can send back an error code. 50 * 51 * Note that if the formatter tells us there's no space left in the buffer we 52 * move the cursor forward and abort the walk. 53 */ 54 STATIC int 55 xfs_bulkstat_one_int( 56 struct xfs_mount *mp, 57 struct xfs_trans *tp, 58 xfs_ino_t ino, 59 struct xfs_bstat_chunk *bc) 60 { 61 struct xfs_icdinode *dic; /* dinode core info pointer */ 62 struct xfs_inode *ip; /* incore inode pointer */ 63 struct inode *inode; 64 struct xfs_bulkstat *buf = bc->buf; 65 int error = -EINVAL; 66 67 if (xfs_internal_inum(mp, ino)) 68 goto out_advance; 69 70 error = xfs_iget(mp, tp, ino, 71 (XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED), 72 XFS_ILOCK_SHARED, &ip); 73 if (error == -ENOENT || error == -EINVAL) 74 goto out_advance; 75 if (error) 76 goto out; 77 78 ASSERT(ip != NULL); 79 ASSERT(ip->i_imap.im_blkno != 0); 80 inode = VFS_I(ip); 81 82 dic = &ip->i_d; 83 84 /* xfs_iget returns the following without needing 85 * further change. 86 */ 87 buf->bs_projectid = ip->i_d.di_projid; 88 buf->bs_ino = ino; 89 buf->bs_uid = dic->di_uid; 90 buf->bs_gid = dic->di_gid; 91 buf->bs_size = dic->di_size; 92 93 buf->bs_nlink = inode->i_nlink; 94 buf->bs_atime = inode->i_atime.tv_sec; 95 buf->bs_atime_nsec = inode->i_atime.tv_nsec; 96 buf->bs_mtime = inode->i_mtime.tv_sec; 97 buf->bs_mtime_nsec = inode->i_mtime.tv_nsec; 98 buf->bs_ctime = inode->i_ctime.tv_sec; 99 buf->bs_ctime_nsec = inode->i_ctime.tv_nsec; 100 buf->bs_btime = dic->di_crtime.tv_sec; 101 buf->bs_btime_nsec = dic->di_crtime.tv_nsec; 102 buf->bs_gen = inode->i_generation; 103 buf->bs_mode = inode->i_mode; 104 105 buf->bs_xflags = xfs_ip2xflags(ip); 106 buf->bs_extsize_blks = dic->di_extsize; 107 buf->bs_extents = dic->di_nextents; 108 xfs_bulkstat_health(ip, buf); 109 buf->bs_aextents = dic->di_anextents; 110 buf->bs_forkoff = XFS_IFORK_BOFF(ip); 111 buf->bs_version = XFS_BULKSTAT_VERSION_V5; 112 113 if (dic->di_version == 3) { 114 if (dic->di_flags2 & XFS_DIFLAG2_COWEXTSIZE) 115 buf->bs_cowextsize_blks = dic->di_cowextsize; 116 } 117 118 switch (dic->di_format) { 119 case XFS_DINODE_FMT_DEV: 120 buf->bs_rdev = sysv_encode_dev(inode->i_rdev); 121 buf->bs_blksize = BLKDEV_IOSIZE; 122 buf->bs_blocks = 0; 123 break; 124 case XFS_DINODE_FMT_LOCAL: 125 buf->bs_rdev = 0; 126 buf->bs_blksize = mp->m_sb.sb_blocksize; 127 buf->bs_blocks = 0; 128 break; 129 case XFS_DINODE_FMT_EXTENTS: 130 case XFS_DINODE_FMT_BTREE: 131 buf->bs_rdev = 0; 132 buf->bs_blksize = mp->m_sb.sb_blocksize; 133 buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks; 134 break; 135 } 136 xfs_iunlock(ip, XFS_ILOCK_SHARED); 137 xfs_irele(ip); 138 139 error = bc->formatter(bc->breq, buf); 140 if (error == -ECANCELED) 141 goto out_advance; 142 if (error) 143 goto out; 144 145 out_advance: 146 /* 147 * Advance the cursor to the inode that comes after the one we just 148 * looked at. We want the caller to move along if the bulkstat 149 * information was copied successfully; if we tried to grab the inode 150 * but it's no longer allocated; or if it's internal metadata. 151 */ 152 bc->breq->startino = ino + 1; 153 out: 154 return error; 155 } 156 157 /* Bulkstat a single inode. */ 158 int 159 xfs_bulkstat_one( 160 struct xfs_ibulk *breq, 161 bulkstat_one_fmt_pf formatter) 162 { 163 struct xfs_bstat_chunk bc = { 164 .formatter = formatter, 165 .breq = breq, 166 }; 167 int error; 168 169 ASSERT(breq->icount == 1); 170 171 bc.buf = kmem_zalloc(sizeof(struct xfs_bulkstat), 172 KM_MAYFAIL); 173 if (!bc.buf) 174 return -ENOMEM; 175 176 error = xfs_bulkstat_one_int(breq->mp, NULL, breq->startino, &bc); 177 178 kmem_free(bc.buf); 179 180 /* 181 * If we reported one inode to userspace then we abort because we hit 182 * the end of the buffer. Don't leak that back to userspace. 183 */ 184 if (error == -ECANCELED) 185 error = 0; 186 187 return error; 188 } 189 190 static int 191 xfs_bulkstat_iwalk( 192 struct xfs_mount *mp, 193 struct xfs_trans *tp, 194 xfs_ino_t ino, 195 void *data) 196 { 197 int error; 198 199 error = xfs_bulkstat_one_int(mp, tp, ino, data); 200 /* bulkstat just skips over missing inodes */ 201 if (error == -ENOENT || error == -EINVAL) 202 return 0; 203 return error; 204 } 205 206 /* 207 * Check the incoming lastino parameter. 208 * 209 * We allow any inode value that could map to physical space inside the 210 * filesystem because if there are no inodes there, bulkstat moves on to the 211 * next chunk. In other words, the magic agino value of zero takes us to the 212 * first chunk in the AG, and an agino value past the end of the AG takes us to 213 * the first chunk in the next AG. 214 * 215 * Therefore we can end early if the requested inode is beyond the end of the 216 * filesystem or doesn't map properly. 217 */ 218 static inline bool 219 xfs_bulkstat_already_done( 220 struct xfs_mount *mp, 221 xfs_ino_t startino) 222 { 223 xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, startino); 224 xfs_agino_t agino = XFS_INO_TO_AGINO(mp, startino); 225 226 return agno >= mp->m_sb.sb_agcount || 227 startino != XFS_AGINO_TO_INO(mp, agno, agino); 228 } 229 230 /* Return stat information in bulk (by-inode) for the filesystem. */ 231 int 232 xfs_bulkstat( 233 struct xfs_ibulk *breq, 234 bulkstat_one_fmt_pf formatter) 235 { 236 struct xfs_bstat_chunk bc = { 237 .formatter = formatter, 238 .breq = breq, 239 }; 240 int error; 241 242 if (xfs_bulkstat_already_done(breq->mp, breq->startino)) 243 return 0; 244 245 bc.buf = kmem_zalloc(sizeof(struct xfs_bulkstat), 246 KM_MAYFAIL); 247 if (!bc.buf) 248 return -ENOMEM; 249 250 error = xfs_iwalk(breq->mp, NULL, breq->startino, breq->flags, 251 xfs_bulkstat_iwalk, breq->icount, &bc); 252 253 kmem_free(bc.buf); 254 255 /* 256 * We found some inodes, so clear the error status and return them. 257 * The lastino pointer will point directly at the inode that triggered 258 * any error that occurred, so on the next call the error will be 259 * triggered again and propagated to userspace as there will be no 260 * formatted inodes in the buffer. 261 */ 262 if (breq->ocount > 0) 263 error = 0; 264 265 return error; 266 } 267 268 /* Convert bulkstat (v5) to bstat (v1). */ 269 void 270 xfs_bulkstat_to_bstat( 271 struct xfs_mount *mp, 272 struct xfs_bstat *bs1, 273 const struct xfs_bulkstat *bstat) 274 { 275 /* memset is needed here because of padding holes in the structure. */ 276 memset(bs1, 0, sizeof(struct xfs_bstat)); 277 bs1->bs_ino = bstat->bs_ino; 278 bs1->bs_mode = bstat->bs_mode; 279 bs1->bs_nlink = bstat->bs_nlink; 280 bs1->bs_uid = bstat->bs_uid; 281 bs1->bs_gid = bstat->bs_gid; 282 bs1->bs_rdev = bstat->bs_rdev; 283 bs1->bs_blksize = bstat->bs_blksize; 284 bs1->bs_size = bstat->bs_size; 285 bs1->bs_atime.tv_sec = bstat->bs_atime; 286 bs1->bs_mtime.tv_sec = bstat->bs_mtime; 287 bs1->bs_ctime.tv_sec = bstat->bs_ctime; 288 bs1->bs_atime.tv_nsec = bstat->bs_atime_nsec; 289 bs1->bs_mtime.tv_nsec = bstat->bs_mtime_nsec; 290 bs1->bs_ctime.tv_nsec = bstat->bs_ctime_nsec; 291 bs1->bs_blocks = bstat->bs_blocks; 292 bs1->bs_xflags = bstat->bs_xflags; 293 bs1->bs_extsize = XFS_FSB_TO_B(mp, bstat->bs_extsize_blks); 294 bs1->bs_extents = bstat->bs_extents; 295 bs1->bs_gen = bstat->bs_gen; 296 bs1->bs_projid_lo = bstat->bs_projectid & 0xFFFF; 297 bs1->bs_forkoff = bstat->bs_forkoff; 298 bs1->bs_projid_hi = bstat->bs_projectid >> 16; 299 bs1->bs_sick = bstat->bs_sick; 300 bs1->bs_checked = bstat->bs_checked; 301 bs1->bs_cowextsize = XFS_FSB_TO_B(mp, bstat->bs_cowextsize_blks); 302 bs1->bs_dmevmask = 0; 303 bs1->bs_dmstate = 0; 304 bs1->bs_aextents = bstat->bs_aextents; 305 } 306 307 struct xfs_inumbers_chunk { 308 inumbers_fmt_pf formatter; 309 struct xfs_ibulk *breq; 310 }; 311 312 /* 313 * INUMBERS 314 * ======== 315 * This is how we export inode btree records to userspace, so that XFS tools 316 * can figure out where inodes are allocated. 317 */ 318 319 /* 320 * Format the inode group structure and report it somewhere. 321 * 322 * Similar to xfs_bulkstat_one_int, lastino is the inode cursor as we walk 323 * through the filesystem so we move it forward unless there was a runtime 324 * error. If the formatter tells us the buffer is now full we also move the 325 * cursor forward and abort the walk. 326 */ 327 STATIC int 328 xfs_inumbers_walk( 329 struct xfs_mount *mp, 330 struct xfs_trans *tp, 331 xfs_agnumber_t agno, 332 const struct xfs_inobt_rec_incore *irec, 333 void *data) 334 { 335 struct xfs_inumbers inogrp = { 336 .xi_startino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino), 337 .xi_alloccount = irec->ir_count - irec->ir_freecount, 338 .xi_allocmask = ~irec->ir_free, 339 .xi_version = XFS_INUMBERS_VERSION_V5, 340 }; 341 struct xfs_inumbers_chunk *ic = data; 342 int error; 343 344 error = ic->formatter(ic->breq, &inogrp); 345 if (error && error != -ECANCELED) 346 return error; 347 348 ic->breq->startino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino) + 349 XFS_INODES_PER_CHUNK; 350 return error; 351 } 352 353 /* 354 * Return inode number table for the filesystem. 355 */ 356 int 357 xfs_inumbers( 358 struct xfs_ibulk *breq, 359 inumbers_fmt_pf formatter) 360 { 361 struct xfs_inumbers_chunk ic = { 362 .formatter = formatter, 363 .breq = breq, 364 }; 365 int error = 0; 366 367 if (xfs_bulkstat_already_done(breq->mp, breq->startino)) 368 return 0; 369 370 error = xfs_inobt_walk(breq->mp, NULL, breq->startino, breq->flags, 371 xfs_inumbers_walk, breq->icount, &ic); 372 373 /* 374 * We found some inode groups, so clear the error status and return 375 * them. The lastino pointer will point directly at the inode that 376 * triggered any error that occurred, so on the next call the error 377 * will be triggered again and propagated to userspace as there will be 378 * no formatted inode groups in the buffer. 379 */ 380 if (breq->ocount > 0) 381 error = 0; 382 383 return error; 384 } 385 386 /* Convert an inumbers (v5) struct to a inogrp (v1) struct. */ 387 void 388 xfs_inumbers_to_inogrp( 389 struct xfs_inogrp *ig1, 390 const struct xfs_inumbers *ig) 391 { 392 /* memset is needed here because of padding holes in the structure. */ 393 memset(ig1, 0, sizeof(struct xfs_inogrp)); 394 ig1->xi_startino = ig->xi_startino; 395 ig1->xi_alloccount = ig->xi_alloccount; 396 ig1->xi_allocmask = ig->xi_allocmask; 397 } 398