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1// SPDX-License-Identifier: GPL-2.02/*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#include "xfs_trans.h"23 24/*25 * Bulk Stat26 * =========27 *28 * Use the inode walking functions to fill out struct xfs_bulkstat for every29 * allocated inode, then pass the stat information to some externally provided30 * iteration function.31 */32 33struct xfs_bstat_chunk {34 bulkstat_one_fmt_pf formatter;35 struct xfs_ibulk *breq;36 struct xfs_bulkstat *buf;37};38 39/*40 * Fill out the bulkstat info for a single inode and report it somewhere.41 *42 * bc->breq->lastino is effectively the inode cursor as we walk through the43 * filesystem. Therefore, we update it any time we need to move the cursor44 * forward, regardless of whether or not we're sending any bstat information45 * back to userspace. If the inode is internal metadata or, has been freed46 * out from under us, we just simply keep going.47 *48 * However, if any other type of error happens we want to stop right where we49 * are so that userspace will call back with exact number of the bad inode and50 * we can send back an error code.51 *52 * Note that if the formatter tells us there's no space left in the buffer we53 * move the cursor forward and abort the walk.54 */55STATIC int56xfs_bulkstat_one_int(57 struct xfs_mount *mp,58 struct mnt_idmap *idmap,59 struct xfs_trans *tp,60 xfs_ino_t ino,61 struct xfs_bstat_chunk *bc)62{63 struct user_namespace *sb_userns = mp->m_super->s_user_ns;64 struct xfs_inode *ip; /* incore inode pointer */65 struct inode *inode;66 struct xfs_bulkstat *buf = bc->buf;67 xfs_extnum_t nextents;68 int error = -EINVAL;69 vfsuid_t vfsuid;70 vfsgid_t vfsgid;71 72 if (xfs_internal_inum(mp, ino))73 goto out_advance;74 75 error = xfs_iget(mp, tp, ino,76 (XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED),77 XFS_ILOCK_SHARED, &ip);78 if (error == -ENOENT || error == -EINVAL)79 goto out_advance;80 if (error)81 goto out;82 83 /* Reload the incore unlinked list to avoid failure in inodegc. */84 if (xfs_inode_unlinked_incomplete(ip)) {85 error = xfs_inode_reload_unlinked_bucket(tp, ip);86 if (error) {87 xfs_iunlock(ip, XFS_ILOCK_SHARED);88 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);89 xfs_irele(ip);90 return error;91 }92 }93 94 ASSERT(ip != NULL);95 ASSERT(ip->i_imap.im_blkno != 0);96 inode = VFS_I(ip);97 vfsuid = i_uid_into_vfsuid(idmap, inode);98 vfsgid = i_gid_into_vfsgid(idmap, inode);99 100 /* If this is a private inode, don't leak its details to userspace. */101 if (IS_PRIVATE(inode)) {102 xfs_iunlock(ip, XFS_ILOCK_SHARED);103 xfs_irele(ip);104 error = -EINVAL;105 goto out_advance;106 }107 108 /* xfs_iget returns the following without needing109 * further change.110 */111 buf->bs_projectid = ip->i_projid;112 buf->bs_ino = ino;113 buf->bs_uid = from_kuid(sb_userns, vfsuid_into_kuid(vfsuid));114 buf->bs_gid = from_kgid(sb_userns, vfsgid_into_kgid(vfsgid));115 buf->bs_size = ip->i_disk_size;116 117 buf->bs_nlink = inode->i_nlink;118 buf->bs_atime = inode_get_atime_sec(inode);119 buf->bs_atime_nsec = inode_get_atime_nsec(inode);120 buf->bs_mtime = inode_get_mtime_sec(inode);121 buf->bs_mtime_nsec = inode_get_mtime_nsec(inode);122 buf->bs_ctime = inode_get_ctime_sec(inode);123 buf->bs_ctime_nsec = inode_get_ctime_nsec(inode);124 buf->bs_gen = inode->i_generation;125 buf->bs_mode = inode->i_mode;126 127 buf->bs_xflags = xfs_ip2xflags(ip);128 buf->bs_extsize_blks = ip->i_extsize;129 130 nextents = xfs_ifork_nextents(&ip->i_df);131 if (!(bc->breq->flags & XFS_IBULK_NREXT64))132 buf->bs_extents = min(nextents, XFS_MAX_EXTCNT_DATA_FORK_SMALL);133 else134 buf->bs_extents64 = nextents;135 136 xfs_bulkstat_health(ip, buf);137 buf->bs_aextents = xfs_ifork_nextents(&ip->i_af);138 buf->bs_forkoff = xfs_inode_fork_boff(ip);139 buf->bs_version = XFS_BULKSTAT_VERSION_V5;140 141 if (xfs_has_v3inodes(mp)) {142 buf->bs_btime = ip->i_crtime.tv_sec;143 buf->bs_btime_nsec = ip->i_crtime.tv_nsec;144 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)145 buf->bs_cowextsize_blks = ip->i_cowextsize;146 }147 148 switch (ip->i_df.if_format) {149 case XFS_DINODE_FMT_DEV:150 buf->bs_rdev = sysv_encode_dev(inode->i_rdev);151 buf->bs_blksize = BLKDEV_IOSIZE;152 buf->bs_blocks = 0;153 break;154 case XFS_DINODE_FMT_LOCAL:155 buf->bs_rdev = 0;156 buf->bs_blksize = mp->m_sb.sb_blocksize;157 buf->bs_blocks = 0;158 break;159 case XFS_DINODE_FMT_EXTENTS:160 case XFS_DINODE_FMT_BTREE:161 buf->bs_rdev = 0;162 buf->bs_blksize = mp->m_sb.sb_blocksize;163 buf->bs_blocks = ip->i_nblocks + ip->i_delayed_blks;164 break;165 }166 xfs_iunlock(ip, XFS_ILOCK_SHARED);167 xfs_irele(ip);168 169 error = bc->formatter(bc->breq, buf);170 if (error == -ECANCELED)171 goto out_advance;172 if (error)173 goto out;174 175out_advance:176 /*177 * Advance the cursor to the inode that comes after the one we just178 * looked at. We want the caller to move along if the bulkstat179 * information was copied successfully; if we tried to grab the inode180 * but it's no longer allocated; or if it's internal metadata.181 */182 bc->breq->startino = ino + 1;183out:184 return error;185}186 187/* Bulkstat a single inode. */188int189xfs_bulkstat_one(190 struct xfs_ibulk *breq,191 bulkstat_one_fmt_pf formatter)192{193 struct xfs_bstat_chunk bc = {194 .formatter = formatter,195 .breq = breq,196 };197 struct xfs_trans *tp;198 int error;199 200 if (breq->idmap != &nop_mnt_idmap) {201 xfs_warn_ratelimited(breq->mp,202 "bulkstat not supported inside of idmapped mounts.");203 return -EINVAL;204 }205 206 ASSERT(breq->icount == 1);207 208 bc.buf = kzalloc(sizeof(struct xfs_bulkstat),209 GFP_KERNEL | __GFP_RETRY_MAYFAIL);210 if (!bc.buf)211 return -ENOMEM;212 213 /*214 * Grab an empty transaction so that we can use its recursive buffer215 * locking abilities to detect cycles in the inobt without deadlocking.216 */217 error = xfs_trans_alloc_empty(breq->mp, &tp);218 if (error)219 goto out;220 221 error = xfs_bulkstat_one_int(breq->mp, breq->idmap, tp,222 breq->startino, &bc);223 xfs_trans_cancel(tp);224out:225 kfree(bc.buf);226 227 /*228 * If we reported one inode to userspace then we abort because we hit229 * the end of the buffer. Don't leak that back to userspace.230 */231 if (error == -ECANCELED)232 error = 0;233 234 return error;235}236 237static int238xfs_bulkstat_iwalk(239 struct xfs_mount *mp,240 struct xfs_trans *tp,241 xfs_ino_t ino,242 void *data)243{244 struct xfs_bstat_chunk *bc = data;245 int error;246 247 error = xfs_bulkstat_one_int(mp, bc->breq->idmap, tp, ino, data);248 /* bulkstat just skips over missing inodes */249 if (error == -ENOENT || error == -EINVAL)250 return 0;251 return error;252}253 254/*255 * Check the incoming lastino parameter.256 *257 * We allow any inode value that could map to physical space inside the258 * filesystem because if there are no inodes there, bulkstat moves on to the259 * next chunk. In other words, the magic agino value of zero takes us to the260 * first chunk in the AG, and an agino value past the end of the AG takes us to261 * the first chunk in the next AG.262 *263 * Therefore we can end early if the requested inode is beyond the end of the264 * filesystem or doesn't map properly.265 */266static inline bool267xfs_bulkstat_already_done(268 struct xfs_mount *mp,269 xfs_ino_t startino)270{271 xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, startino);272 xfs_agino_t agino = XFS_INO_TO_AGINO(mp, startino);273 274 return agno >= mp->m_sb.sb_agcount ||275 startino != XFS_AGINO_TO_INO(mp, agno, agino);276}277 278/* Return stat information in bulk (by-inode) for the filesystem. */279int280xfs_bulkstat(281 struct xfs_ibulk *breq,282 bulkstat_one_fmt_pf formatter)283{284 struct xfs_bstat_chunk bc = {285 .formatter = formatter,286 .breq = breq,287 };288 struct xfs_trans *tp;289 unsigned int iwalk_flags = 0;290 int error;291 292 if (breq->idmap != &nop_mnt_idmap) {293 xfs_warn_ratelimited(breq->mp,294 "bulkstat not supported inside of idmapped mounts.");295 return -EINVAL;296 }297 if (xfs_bulkstat_already_done(breq->mp, breq->startino))298 return 0;299 300 bc.buf = kzalloc(sizeof(struct xfs_bulkstat),301 GFP_KERNEL | __GFP_RETRY_MAYFAIL);302 if (!bc.buf)303 return -ENOMEM;304 305 /*306 * Grab an empty transaction so that we can use its recursive buffer307 * locking abilities to detect cycles in the inobt without deadlocking.308 */309 error = xfs_trans_alloc_empty(breq->mp, &tp);310 if (error)311 goto out;312 313 if (breq->flags & XFS_IBULK_SAME_AG)314 iwalk_flags |= XFS_IWALK_SAME_AG;315 316 error = xfs_iwalk(breq->mp, tp, breq->startino, iwalk_flags,317 xfs_bulkstat_iwalk, breq->icount, &bc);318 xfs_trans_cancel(tp);319out:320 kfree(bc.buf);321 322 /*323 * We found some inodes, so clear the error status and return them.324 * The lastino pointer will point directly at the inode that triggered325 * any error that occurred, so on the next call the error will be326 * triggered again and propagated to userspace as there will be no327 * formatted inodes in the buffer.328 */329 if (breq->ocount > 0)330 error = 0;331 332 return error;333}334 335/* Convert bulkstat (v5) to bstat (v1). */336void337xfs_bulkstat_to_bstat(338 struct xfs_mount *mp,339 struct xfs_bstat *bs1,340 const struct xfs_bulkstat *bstat)341{342 /* memset is needed here because of padding holes in the structure. */343 memset(bs1, 0, sizeof(struct xfs_bstat));344 bs1->bs_ino = bstat->bs_ino;345 bs1->bs_mode = bstat->bs_mode;346 bs1->bs_nlink = bstat->bs_nlink;347 bs1->bs_uid = bstat->bs_uid;348 bs1->bs_gid = bstat->bs_gid;349 bs1->bs_rdev = bstat->bs_rdev;350 bs1->bs_blksize = bstat->bs_blksize;351 bs1->bs_size = bstat->bs_size;352 bs1->bs_atime.tv_sec = bstat->bs_atime;353 bs1->bs_mtime.tv_sec = bstat->bs_mtime;354 bs1->bs_ctime.tv_sec = bstat->bs_ctime;355 bs1->bs_atime.tv_nsec = bstat->bs_atime_nsec;356 bs1->bs_mtime.tv_nsec = bstat->bs_mtime_nsec;357 bs1->bs_ctime.tv_nsec = bstat->bs_ctime_nsec;358 bs1->bs_blocks = bstat->bs_blocks;359 bs1->bs_xflags = bstat->bs_xflags;360 bs1->bs_extsize = XFS_FSB_TO_B(mp, bstat->bs_extsize_blks);361 bs1->bs_extents = bstat->bs_extents;362 bs1->bs_gen = bstat->bs_gen;363 bs1->bs_projid_lo = bstat->bs_projectid & 0xFFFF;364 bs1->bs_forkoff = bstat->bs_forkoff;365 bs1->bs_projid_hi = bstat->bs_projectid >> 16;366 bs1->bs_sick = bstat->bs_sick;367 bs1->bs_checked = bstat->bs_checked;368 bs1->bs_cowextsize = XFS_FSB_TO_B(mp, bstat->bs_cowextsize_blks);369 bs1->bs_dmevmask = 0;370 bs1->bs_dmstate = 0;371 bs1->bs_aextents = bstat->bs_aextents;372}373 374struct xfs_inumbers_chunk {375 inumbers_fmt_pf formatter;376 struct xfs_ibulk *breq;377};378 379/*380 * INUMBERS381 * ========382 * This is how we export inode btree records to userspace, so that XFS tools383 * can figure out where inodes are allocated.384 */385 386/*387 * Format the inode group structure and report it somewhere.388 *389 * Similar to xfs_bulkstat_one_int, lastino is the inode cursor as we walk390 * through the filesystem so we move it forward unless there was a runtime391 * error. If the formatter tells us the buffer is now full we also move the392 * cursor forward and abort the walk.393 */394STATIC int395xfs_inumbers_walk(396 struct xfs_mount *mp,397 struct xfs_trans *tp,398 xfs_agnumber_t agno,399 const struct xfs_inobt_rec_incore *irec,400 void *data)401{402 struct xfs_inumbers inogrp = {403 .xi_startino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino),404 .xi_alloccount = irec->ir_count - irec->ir_freecount,405 .xi_allocmask = ~irec->ir_free,406 .xi_version = XFS_INUMBERS_VERSION_V5,407 };408 struct xfs_inumbers_chunk *ic = data;409 int error;410 411 error = ic->formatter(ic->breq, &inogrp);412 if (error && error != -ECANCELED)413 return error;414 415 ic->breq->startino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino) +416 XFS_INODES_PER_CHUNK;417 return error;418}419 420/*421 * Return inode number table for the filesystem.422 */423int424xfs_inumbers(425 struct xfs_ibulk *breq,426 inumbers_fmt_pf formatter)427{428 struct xfs_inumbers_chunk ic = {429 .formatter = formatter,430 .breq = breq,431 };432 struct xfs_trans *tp;433 int error = 0;434 435 if (xfs_bulkstat_already_done(breq->mp, breq->startino))436 return 0;437 438 /*439 * Grab an empty transaction so that we can use its recursive buffer440 * locking abilities to detect cycles in the inobt without deadlocking.441 */442 error = xfs_trans_alloc_empty(breq->mp, &tp);443 if (error)444 goto out;445 446 error = xfs_inobt_walk(breq->mp, tp, breq->startino, breq->flags,447 xfs_inumbers_walk, breq->icount, &ic);448 xfs_trans_cancel(tp);449out:450 451 /*452 * We found some inode groups, so clear the error status and return453 * them. The lastino pointer will point directly at the inode that454 * triggered any error that occurred, so on the next call the error455 * will be triggered again and propagated to userspace as there will be456 * no formatted inode groups in the buffer.457 */458 if (breq->ocount > 0)459 error = 0;460 461 return error;462}463 464/* Convert an inumbers (v5) struct to a inogrp (v1) struct. */465void466xfs_inumbers_to_inogrp(467 struct xfs_inogrp *ig1,468 const struct xfs_inumbers *ig)469{470 /* memset is needed here because of padding holes in the structure. */471 memset(ig1, 0, sizeof(struct xfs_inogrp));472 ig1->xi_startino = ig->xi_startino;473 ig1->xi_alloccount = ig->xi_alloccount;474 ig1->xi_allocmask = ig->xi_allocmask;475}476