10b61f8a4SDave Chinner // SPDX-License-Identifier: GPL-2.0 230f712c9SDave Chinner /* 330f712c9SDave Chinner * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. 430f712c9SDave Chinner * Copyright (c) 2013 Red Hat, Inc. 530f712c9SDave Chinner * All Rights Reserved. 630f712c9SDave Chinner */ 730f712c9SDave Chinner #include "xfs.h" 830f712c9SDave Chinner #include "xfs_fs.h" 95467b34bSDarrick J. Wong #include "xfs_shared.h" 1030f712c9SDave Chinner #include "xfs_format.h" 1130f712c9SDave Chinner #include "xfs_log_format.h" 1230f712c9SDave Chinner #include "xfs_trans_resv.h" 1330f712c9SDave Chinner #include "xfs_mount.h" 1430f712c9SDave Chinner #include "xfs_inode.h" 1530f712c9SDave Chinner #include "xfs_trans.h" 1630f712c9SDave Chinner #include "xfs_bmap.h" 1730f712c9SDave Chinner #include "xfs_buf_item.h" 1830f712c9SDave Chinner #include "xfs_dir2.h" 1930f712c9SDave Chinner #include "xfs_dir2_priv.h" 2030f712c9SDave Chinner #include "xfs_error.h" 2130f712c9SDave Chinner #include "xfs_trace.h" 22a45086e2SBrian Foster #include "xfs_log.h" 2330f712c9SDave Chinner 2430f712c9SDave Chinner /* 2530f712c9SDave Chinner * Local function prototypes. 2630f712c9SDave Chinner */ 2730f712c9SDave Chinner static void xfs_dir2_block_log_leaf(xfs_trans_t *tp, struct xfs_buf *bp, 2830f712c9SDave Chinner int first, int last); 2930f712c9SDave Chinner static void xfs_dir2_block_log_tail(xfs_trans_t *tp, struct xfs_buf *bp); 3030f712c9SDave Chinner static int xfs_dir2_block_lookup_int(xfs_da_args_t *args, struct xfs_buf **bpp, 3130f712c9SDave Chinner int *entno); 3230f712c9SDave Chinner static int xfs_dir2_block_sort(const void *a, const void *b); 3330f712c9SDave Chinner 3430f712c9SDave Chinner static xfs_dahash_t xfs_dir_hash_dot, xfs_dir_hash_dotdot; 3530f712c9SDave Chinner 3630f712c9SDave Chinner /* 3730f712c9SDave Chinner * One-time startup routine called from xfs_init(). 3830f712c9SDave Chinner */ 3930f712c9SDave Chinner void 4030f712c9SDave Chinner xfs_dir_startup(void) 4130f712c9SDave Chinner { 4230f712c9SDave Chinner xfs_dir_hash_dot = xfs_da_hashname((unsigned char *)".", 1); 4330f712c9SDave Chinner xfs_dir_hash_dotdot = xfs_da_hashname((unsigned char *)"..", 2); 4430f712c9SDave Chinner } 4530f712c9SDave Chinner 46a6a781a5SDarrick J. Wong static xfs_failaddr_t 4730f712c9SDave Chinner xfs_dir3_block_verify( 4830f712c9SDave Chinner struct xfs_buf *bp) 4930f712c9SDave Chinner { 50dbd329f1SChristoph Hellwig struct xfs_mount *mp = bp->b_mount; 5130f712c9SDave Chinner struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr; 5230f712c9SDave Chinner 5339708c20SBrian Foster if (!xfs_verify_magic(bp, hdr3->magic)) 54a6a781a5SDarrick J. Wong return __this_address; 5539708c20SBrian Foster 5639708c20SBrian Foster if (xfs_sb_version_hascrc(&mp->m_sb)) { 57ce748eaaSEric Sandeen if (!uuid_equal(&hdr3->uuid, &mp->m_sb.sb_meta_uuid)) 58a6a781a5SDarrick J. Wong return __this_address; 5930f712c9SDave Chinner if (be64_to_cpu(hdr3->blkno) != bp->b_bn) 60a6a781a5SDarrick J. Wong return __this_address; 61a45086e2SBrian Foster if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn))) 62a6a781a5SDarrick J. Wong return __this_address; 6330f712c9SDave Chinner } 649101d370SDarrick J. Wong return __xfs_dir3_data_check(NULL, bp); 6530f712c9SDave Chinner } 6630f712c9SDave Chinner 6730f712c9SDave Chinner static void 6830f712c9SDave Chinner xfs_dir3_block_read_verify( 6930f712c9SDave Chinner struct xfs_buf *bp) 7030f712c9SDave Chinner { 71dbd329f1SChristoph Hellwig struct xfs_mount *mp = bp->b_mount; 72bc1a09b8SDarrick J. Wong xfs_failaddr_t fa; 7330f712c9SDave Chinner 7430f712c9SDave Chinner if (xfs_sb_version_hascrc(&mp->m_sb) && 7530f712c9SDave Chinner !xfs_buf_verify_cksum(bp, XFS_DIR3_DATA_CRC_OFF)) 76bc1a09b8SDarrick J. Wong xfs_verifier_error(bp, -EFSBADCRC, __this_address); 77bc1a09b8SDarrick J. Wong else { 78bc1a09b8SDarrick J. Wong fa = xfs_dir3_block_verify(bp); 79bc1a09b8SDarrick J. Wong if (fa) 80bc1a09b8SDarrick J. Wong xfs_verifier_error(bp, -EFSCORRUPTED, fa); 81bc1a09b8SDarrick J. Wong } 8230f712c9SDave Chinner } 8330f712c9SDave Chinner 8430f712c9SDave Chinner static void 8530f712c9SDave Chinner xfs_dir3_block_write_verify( 8630f712c9SDave Chinner struct xfs_buf *bp) 8730f712c9SDave Chinner { 88dbd329f1SChristoph Hellwig struct xfs_mount *mp = bp->b_mount; 89fb1755a6SCarlos Maiolino struct xfs_buf_log_item *bip = bp->b_log_item; 9030f712c9SDave Chinner struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr; 91bc1a09b8SDarrick J. Wong xfs_failaddr_t fa; 9230f712c9SDave Chinner 93bc1a09b8SDarrick J. Wong fa = xfs_dir3_block_verify(bp); 94bc1a09b8SDarrick J. Wong if (fa) { 95bc1a09b8SDarrick J. Wong xfs_verifier_error(bp, -EFSCORRUPTED, fa); 9630f712c9SDave Chinner return; 9730f712c9SDave Chinner } 9830f712c9SDave Chinner 9930f712c9SDave Chinner if (!xfs_sb_version_hascrc(&mp->m_sb)) 10030f712c9SDave Chinner return; 10130f712c9SDave Chinner 10230f712c9SDave Chinner if (bip) 10330f712c9SDave Chinner hdr3->lsn = cpu_to_be64(bip->bli_item.li_lsn); 10430f712c9SDave Chinner 10530f712c9SDave Chinner xfs_buf_update_cksum(bp, XFS_DIR3_DATA_CRC_OFF); 10630f712c9SDave Chinner } 10730f712c9SDave Chinner 10830f712c9SDave Chinner const struct xfs_buf_ops xfs_dir3_block_buf_ops = { 109233135b7SEric Sandeen .name = "xfs_dir3_block", 11039708c20SBrian Foster .magic = { cpu_to_be32(XFS_DIR2_BLOCK_MAGIC), 11139708c20SBrian Foster cpu_to_be32(XFS_DIR3_BLOCK_MAGIC) }, 11230f712c9SDave Chinner .verify_read = xfs_dir3_block_read_verify, 11330f712c9SDave Chinner .verify_write = xfs_dir3_block_write_verify, 114b5572597SDarrick J. Wong .verify_struct = xfs_dir3_block_verify, 11530f712c9SDave Chinner }; 11630f712c9SDave Chinner 11730f712c9SDave Chinner int 11830f712c9SDave Chinner xfs_dir3_block_read( 11930f712c9SDave Chinner struct xfs_trans *tp, 12030f712c9SDave Chinner struct xfs_inode *dp, 12130f712c9SDave Chinner struct xfs_buf **bpp) 12230f712c9SDave Chinner { 12330f712c9SDave Chinner struct xfs_mount *mp = dp->i_mount; 12430f712c9SDave Chinner int err; 12530f712c9SDave Chinner 12630f712c9SDave Chinner err = xfs_da_read_buf(tp, dp, mp->m_dir_geo->datablk, -1, bpp, 12730f712c9SDave Chinner XFS_DATA_FORK, &xfs_dir3_block_buf_ops); 128cd87d867SDarrick J. Wong if (!err && tp && *bpp) 12930f712c9SDave Chinner xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_DIR_BLOCK_BUF); 13030f712c9SDave Chinner return err; 13130f712c9SDave Chinner } 13230f712c9SDave Chinner 13330f712c9SDave Chinner static void 13430f712c9SDave Chinner xfs_dir3_block_init( 13530f712c9SDave Chinner struct xfs_mount *mp, 13630f712c9SDave Chinner struct xfs_trans *tp, 13730f712c9SDave Chinner struct xfs_buf *bp, 13830f712c9SDave Chinner struct xfs_inode *dp) 13930f712c9SDave Chinner { 14030f712c9SDave Chinner struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr; 14130f712c9SDave Chinner 14230f712c9SDave Chinner bp->b_ops = &xfs_dir3_block_buf_ops; 14330f712c9SDave Chinner xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DIR_BLOCK_BUF); 14430f712c9SDave Chinner 14530f712c9SDave Chinner if (xfs_sb_version_hascrc(&mp->m_sb)) { 14630f712c9SDave Chinner memset(hdr3, 0, sizeof(*hdr3)); 14730f712c9SDave Chinner hdr3->magic = cpu_to_be32(XFS_DIR3_BLOCK_MAGIC); 14830f712c9SDave Chinner hdr3->blkno = cpu_to_be64(bp->b_bn); 14930f712c9SDave Chinner hdr3->owner = cpu_to_be64(dp->i_ino); 150ce748eaaSEric Sandeen uuid_copy(&hdr3->uuid, &mp->m_sb.sb_meta_uuid); 15130f712c9SDave Chinner return; 15230f712c9SDave Chinner 15330f712c9SDave Chinner } 15430f712c9SDave Chinner hdr3->magic = cpu_to_be32(XFS_DIR2_BLOCK_MAGIC); 15530f712c9SDave Chinner } 15630f712c9SDave Chinner 15730f712c9SDave Chinner static void 15830f712c9SDave Chinner xfs_dir2_block_need_space( 15930f712c9SDave Chinner struct xfs_inode *dp, 16030f712c9SDave Chinner struct xfs_dir2_data_hdr *hdr, 16130f712c9SDave Chinner struct xfs_dir2_block_tail *btp, 16230f712c9SDave Chinner struct xfs_dir2_leaf_entry *blp, 16330f712c9SDave Chinner __be16 **tagpp, 16430f712c9SDave Chinner struct xfs_dir2_data_unused **dupp, 16530f712c9SDave Chinner struct xfs_dir2_data_unused **enddupp, 16630f712c9SDave Chinner int *compact, 16730f712c9SDave Chinner int len) 16830f712c9SDave Chinner { 16930f712c9SDave Chinner struct xfs_dir2_data_free *bf; 17030f712c9SDave Chinner __be16 *tagp = NULL; 17130f712c9SDave Chinner struct xfs_dir2_data_unused *dup = NULL; 17230f712c9SDave Chinner struct xfs_dir2_data_unused *enddup = NULL; 17330f712c9SDave Chinner 17430f712c9SDave Chinner *compact = 0; 1751848b607SChristoph Hellwig bf = xfs_dir2_data_bestfree_p(dp->i_mount, hdr); 17630f712c9SDave Chinner 17730f712c9SDave Chinner /* 17830f712c9SDave Chinner * If there are stale entries we'll use one for the leaf. 17930f712c9SDave Chinner */ 18030f712c9SDave Chinner if (btp->stale) { 18130f712c9SDave Chinner if (be16_to_cpu(bf[0].length) >= len) { 18230f712c9SDave Chinner /* 18330f712c9SDave Chinner * The biggest entry enough to avoid compaction. 18430f712c9SDave Chinner */ 18530f712c9SDave Chinner dup = (xfs_dir2_data_unused_t *) 18630f712c9SDave Chinner ((char *)hdr + be16_to_cpu(bf[0].offset)); 18730f712c9SDave Chinner goto out; 18830f712c9SDave Chinner } 18930f712c9SDave Chinner 19030f712c9SDave Chinner /* 19130f712c9SDave Chinner * Will need to compact to make this work. 19230f712c9SDave Chinner * Tag just before the first leaf entry. 19330f712c9SDave Chinner */ 19430f712c9SDave Chinner *compact = 1; 19530f712c9SDave Chinner tagp = (__be16 *)blp - 1; 19630f712c9SDave Chinner 19730f712c9SDave Chinner /* Data object just before the first leaf entry. */ 19830f712c9SDave Chinner dup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp)); 19930f712c9SDave Chinner 20030f712c9SDave Chinner /* 20130f712c9SDave Chinner * If it's not free then the data will go where the 20230f712c9SDave Chinner * leaf data starts now, if it works at all. 20330f712c9SDave Chinner */ 20430f712c9SDave Chinner if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) { 20530f712c9SDave Chinner if (be16_to_cpu(dup->length) + (be32_to_cpu(btp->stale) - 1) * 20630f712c9SDave Chinner (uint)sizeof(*blp) < len) 20730f712c9SDave Chinner dup = NULL; 20830f712c9SDave Chinner } else if ((be32_to_cpu(btp->stale) - 1) * (uint)sizeof(*blp) < len) 20930f712c9SDave Chinner dup = NULL; 21030f712c9SDave Chinner else 21130f712c9SDave Chinner dup = (xfs_dir2_data_unused_t *)blp; 21230f712c9SDave Chinner goto out; 21330f712c9SDave Chinner } 21430f712c9SDave Chinner 21530f712c9SDave Chinner /* 21630f712c9SDave Chinner * no stale entries, so just use free space. 21730f712c9SDave Chinner * Tag just before the first leaf entry. 21830f712c9SDave Chinner */ 21930f712c9SDave Chinner tagp = (__be16 *)blp - 1; 22030f712c9SDave Chinner 22130f712c9SDave Chinner /* Data object just before the first leaf entry. */ 22230f712c9SDave Chinner enddup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp)); 22330f712c9SDave Chinner 22430f712c9SDave Chinner /* 22530f712c9SDave Chinner * If it's not free then can't do this add without cleaning up: 22630f712c9SDave Chinner * the space before the first leaf entry needs to be free so it 22730f712c9SDave Chinner * can be expanded to hold the pointer to the new entry. 22830f712c9SDave Chinner */ 22930f712c9SDave Chinner if (be16_to_cpu(enddup->freetag) == XFS_DIR2_DATA_FREE_TAG) { 23030f712c9SDave Chinner /* 23130f712c9SDave Chinner * Check out the biggest freespace and see if it's the same one. 23230f712c9SDave Chinner */ 23330f712c9SDave Chinner dup = (xfs_dir2_data_unused_t *) 23430f712c9SDave Chinner ((char *)hdr + be16_to_cpu(bf[0].offset)); 23530f712c9SDave Chinner if (dup != enddup) { 23630f712c9SDave Chinner /* 23730f712c9SDave Chinner * Not the same free entry, just check its length. 23830f712c9SDave Chinner */ 23930f712c9SDave Chinner if (be16_to_cpu(dup->length) < len) 24030f712c9SDave Chinner dup = NULL; 24130f712c9SDave Chinner goto out; 24230f712c9SDave Chinner } 24330f712c9SDave Chinner 24430f712c9SDave Chinner /* 24530f712c9SDave Chinner * It is the biggest freespace, can it hold the leaf too? 24630f712c9SDave Chinner */ 24730f712c9SDave Chinner if (be16_to_cpu(dup->length) < len + (uint)sizeof(*blp)) { 24830f712c9SDave Chinner /* 24930f712c9SDave Chinner * Yes, use the second-largest entry instead if it works. 25030f712c9SDave Chinner */ 25130f712c9SDave Chinner if (be16_to_cpu(bf[1].length) >= len) 25230f712c9SDave Chinner dup = (xfs_dir2_data_unused_t *) 25330f712c9SDave Chinner ((char *)hdr + be16_to_cpu(bf[1].offset)); 25430f712c9SDave Chinner else 25530f712c9SDave Chinner dup = NULL; 25630f712c9SDave Chinner } 25730f712c9SDave Chinner } 25830f712c9SDave Chinner out: 25930f712c9SDave Chinner *tagpp = tagp; 26030f712c9SDave Chinner *dupp = dup; 26130f712c9SDave Chinner *enddupp = enddup; 26230f712c9SDave Chinner } 26330f712c9SDave Chinner 26430f712c9SDave Chinner /* 26530f712c9SDave Chinner * compact the leaf entries. 26630f712c9SDave Chinner * Leave the highest-numbered stale entry stale. 26730f712c9SDave Chinner * XXX should be the one closest to mid but mid is not yet computed. 26830f712c9SDave Chinner */ 26930f712c9SDave Chinner static void 27030f712c9SDave Chinner xfs_dir2_block_compact( 27130f712c9SDave Chinner struct xfs_da_args *args, 27230f712c9SDave Chinner struct xfs_buf *bp, 27330f712c9SDave Chinner struct xfs_dir2_data_hdr *hdr, 27430f712c9SDave Chinner struct xfs_dir2_block_tail *btp, 27530f712c9SDave Chinner struct xfs_dir2_leaf_entry *blp, 27630f712c9SDave Chinner int *needlog, 27730f712c9SDave Chinner int *lfloghigh, 27830f712c9SDave Chinner int *lfloglow) 27930f712c9SDave Chinner { 28030f712c9SDave Chinner int fromidx; /* source leaf index */ 28130f712c9SDave Chinner int toidx; /* target leaf index */ 28230f712c9SDave Chinner int needscan = 0; 28330f712c9SDave Chinner int highstale; /* high stale index */ 28430f712c9SDave Chinner 28530f712c9SDave Chinner fromidx = toidx = be32_to_cpu(btp->count) - 1; 28630f712c9SDave Chinner highstale = *lfloghigh = -1; 28730f712c9SDave Chinner for (; fromidx >= 0; fromidx--) { 28830f712c9SDave Chinner if (blp[fromidx].address == cpu_to_be32(XFS_DIR2_NULL_DATAPTR)) { 28930f712c9SDave Chinner if (highstale == -1) 29030f712c9SDave Chinner highstale = toidx; 29130f712c9SDave Chinner else { 29230f712c9SDave Chinner if (*lfloghigh == -1) 29330f712c9SDave Chinner *lfloghigh = toidx; 29430f712c9SDave Chinner continue; 29530f712c9SDave Chinner } 29630f712c9SDave Chinner } 29730f712c9SDave Chinner if (fromidx < toidx) 29830f712c9SDave Chinner blp[toidx] = blp[fromidx]; 29930f712c9SDave Chinner toidx--; 30030f712c9SDave Chinner } 30130f712c9SDave Chinner *lfloglow = toidx + 1 - (be32_to_cpu(btp->stale) - 1); 30230f712c9SDave Chinner *lfloghigh -= be32_to_cpu(btp->stale) - 1; 30330f712c9SDave Chinner be32_add_cpu(&btp->count, -(be32_to_cpu(btp->stale) - 1)); 30430f712c9SDave Chinner xfs_dir2_data_make_free(args, bp, 30530f712c9SDave Chinner (xfs_dir2_data_aoff_t)((char *)blp - (char *)hdr), 30630f712c9SDave Chinner (xfs_dir2_data_aoff_t)((be32_to_cpu(btp->stale) - 1) * sizeof(*blp)), 30730f712c9SDave Chinner needlog, &needscan); 30830f712c9SDave Chinner btp->stale = cpu_to_be32(1); 30930f712c9SDave Chinner /* 31030f712c9SDave Chinner * If we now need to rebuild the bestfree map, do so. 31130f712c9SDave Chinner * This needs to happen before the next call to use_free. 31230f712c9SDave Chinner */ 31330f712c9SDave Chinner if (needscan) 314ae42976dSChristoph Hellwig xfs_dir2_data_freescan(args->dp->i_mount, hdr, needlog); 31530f712c9SDave Chinner } 31630f712c9SDave Chinner 31730f712c9SDave Chinner /* 31830f712c9SDave Chinner * Add an entry to a block directory. 31930f712c9SDave Chinner */ 32030f712c9SDave Chinner int /* error */ 32130f712c9SDave Chinner xfs_dir2_block_addname( 32230f712c9SDave Chinner xfs_da_args_t *args) /* directory op arguments */ 32330f712c9SDave Chinner { 32430f712c9SDave Chinner xfs_dir2_data_hdr_t *hdr; /* block header */ 32530f712c9SDave Chinner xfs_dir2_leaf_entry_t *blp; /* block leaf entries */ 32630f712c9SDave Chinner struct xfs_buf *bp; /* buffer for block */ 32730f712c9SDave Chinner xfs_dir2_block_tail_t *btp; /* block tail */ 32830f712c9SDave Chinner int compact; /* need to compact leaf ents */ 32930f712c9SDave Chinner xfs_dir2_data_entry_t *dep; /* block data entry */ 33030f712c9SDave Chinner xfs_inode_t *dp; /* directory inode */ 33130f712c9SDave Chinner xfs_dir2_data_unused_t *dup; /* block unused entry */ 33230f712c9SDave Chinner int error; /* error return value */ 33330f712c9SDave Chinner xfs_dir2_data_unused_t *enddup=NULL; /* unused at end of data */ 33430f712c9SDave Chinner xfs_dahash_t hash; /* hash value of found entry */ 33530f712c9SDave Chinner int high; /* high index for binary srch */ 33630f712c9SDave Chinner int highstale; /* high stale index */ 33730f712c9SDave Chinner int lfloghigh=0; /* last final leaf to log */ 33830f712c9SDave Chinner int lfloglow=0; /* first final leaf to log */ 33930f712c9SDave Chinner int len; /* length of the new entry */ 34030f712c9SDave Chinner int low; /* low index for binary srch */ 34130f712c9SDave Chinner int lowstale; /* low stale index */ 34230f712c9SDave Chinner int mid=0; /* midpoint for binary srch */ 34330f712c9SDave Chinner int needlog; /* need to log header */ 34430f712c9SDave Chinner int needscan; /* need to rescan freespace */ 34530f712c9SDave Chinner __be16 *tagp; /* pointer to tag value */ 34630f712c9SDave Chinner xfs_trans_t *tp; /* transaction structure */ 34730f712c9SDave Chinner 34830f712c9SDave Chinner trace_xfs_dir2_block_addname(args); 34930f712c9SDave Chinner 35030f712c9SDave Chinner dp = args->dp; 35130f712c9SDave Chinner tp = args->trans; 35230f712c9SDave Chinner 35330f712c9SDave Chinner /* Read the (one and only) directory block into bp. */ 35430f712c9SDave Chinner error = xfs_dir3_block_read(tp, dp, &bp); 35530f712c9SDave Chinner if (error) 35630f712c9SDave Chinner return error; 35730f712c9SDave Chinner 358fdbb8c5bSChristoph Hellwig len = xfs_dir2_data_entsize(dp->i_mount, args->namelen); 35930f712c9SDave Chinner 36030f712c9SDave Chinner /* 36130f712c9SDave Chinner * Set up pointers to parts of the block. 36230f712c9SDave Chinner */ 36330f712c9SDave Chinner hdr = bp->b_addr; 36430f712c9SDave Chinner btp = xfs_dir2_block_tail_p(args->geo, hdr); 36530f712c9SDave Chinner blp = xfs_dir2_block_leaf_p(btp); 36630f712c9SDave Chinner 36730f712c9SDave Chinner /* 36830f712c9SDave Chinner * Find out if we can reuse stale entries or whether we need extra 36930f712c9SDave Chinner * space for entry and new leaf. 37030f712c9SDave Chinner */ 37130f712c9SDave Chinner xfs_dir2_block_need_space(dp, hdr, btp, blp, &tagp, &dup, 37230f712c9SDave Chinner &enddup, &compact, len); 37330f712c9SDave Chinner 37430f712c9SDave Chinner /* 37530f712c9SDave Chinner * Done everything we need for a space check now. 37630f712c9SDave Chinner */ 37730f712c9SDave Chinner if (args->op_flags & XFS_DA_OP_JUSTCHECK) { 37830f712c9SDave Chinner xfs_trans_brelse(tp, bp); 37930f712c9SDave Chinner if (!dup) 3802451337dSDave Chinner return -ENOSPC; 38130f712c9SDave Chinner return 0; 38230f712c9SDave Chinner } 38330f712c9SDave Chinner 38430f712c9SDave Chinner /* 38530f712c9SDave Chinner * If we don't have space for the new entry & leaf ... 38630f712c9SDave Chinner */ 38730f712c9SDave Chinner if (!dup) { 38830f712c9SDave Chinner /* Don't have a space reservation: return no-space. */ 38930f712c9SDave Chinner if (args->total == 0) 3902451337dSDave Chinner return -ENOSPC; 39130f712c9SDave Chinner /* 39230f712c9SDave Chinner * Convert to the next larger format. 39330f712c9SDave Chinner * Then add the new entry in that format. 39430f712c9SDave Chinner */ 39530f712c9SDave Chinner error = xfs_dir2_block_to_leaf(args, bp); 39630f712c9SDave Chinner if (error) 39730f712c9SDave Chinner return error; 39830f712c9SDave Chinner return xfs_dir2_leaf_addname(args); 39930f712c9SDave Chinner } 40030f712c9SDave Chinner 40130f712c9SDave Chinner needlog = needscan = 0; 40230f712c9SDave Chinner 40330f712c9SDave Chinner /* 40430f712c9SDave Chinner * If need to compact the leaf entries, do it now. 40530f712c9SDave Chinner */ 40630f712c9SDave Chinner if (compact) { 40730f712c9SDave Chinner xfs_dir2_block_compact(args, bp, hdr, btp, blp, &needlog, 40830f712c9SDave Chinner &lfloghigh, &lfloglow); 40930f712c9SDave Chinner /* recalculate blp post-compaction */ 41030f712c9SDave Chinner blp = xfs_dir2_block_leaf_p(btp); 41130f712c9SDave Chinner } else if (btp->stale) { 41230f712c9SDave Chinner /* 41330f712c9SDave Chinner * Set leaf logging boundaries to impossible state. 41430f712c9SDave Chinner * For the no-stale case they're set explicitly. 41530f712c9SDave Chinner */ 41630f712c9SDave Chinner lfloglow = be32_to_cpu(btp->count); 41730f712c9SDave Chinner lfloghigh = -1; 41830f712c9SDave Chinner } 41930f712c9SDave Chinner 42030f712c9SDave Chinner /* 42130f712c9SDave Chinner * Find the slot that's first lower than our hash value, -1 if none. 42230f712c9SDave Chinner */ 42330f712c9SDave Chinner for (low = 0, high = be32_to_cpu(btp->count) - 1; low <= high; ) { 42430f712c9SDave Chinner mid = (low + high) >> 1; 42530f712c9SDave Chinner if ((hash = be32_to_cpu(blp[mid].hashval)) == args->hashval) 42630f712c9SDave Chinner break; 42730f712c9SDave Chinner if (hash < args->hashval) 42830f712c9SDave Chinner low = mid + 1; 42930f712c9SDave Chinner else 43030f712c9SDave Chinner high = mid - 1; 43130f712c9SDave Chinner } 43230f712c9SDave Chinner while (mid >= 0 && be32_to_cpu(blp[mid].hashval) >= args->hashval) { 43330f712c9SDave Chinner mid--; 43430f712c9SDave Chinner } 43530f712c9SDave Chinner /* 43630f712c9SDave Chinner * No stale entries, will use enddup space to hold new leaf. 43730f712c9SDave Chinner */ 43830f712c9SDave Chinner if (!btp->stale) { 4396915ef35SDarrick J. Wong xfs_dir2_data_aoff_t aoff; 4406915ef35SDarrick J. Wong 44130f712c9SDave Chinner /* 44230f712c9SDave Chinner * Mark the space needed for the new leaf entry, now in use. 44330f712c9SDave Chinner */ 4446915ef35SDarrick J. Wong aoff = (xfs_dir2_data_aoff_t)((char *)enddup - (char *)hdr + 4456915ef35SDarrick J. Wong be16_to_cpu(enddup->length) - sizeof(*blp)); 4466915ef35SDarrick J. Wong error = xfs_dir2_data_use_free(args, bp, enddup, aoff, 4476915ef35SDarrick J. Wong (xfs_dir2_data_aoff_t)sizeof(*blp), &needlog, 4486915ef35SDarrick J. Wong &needscan); 4496915ef35SDarrick J. Wong if (error) 4506915ef35SDarrick J. Wong return error; 4516915ef35SDarrick J. Wong 45230f712c9SDave Chinner /* 45330f712c9SDave Chinner * Update the tail (entry count). 45430f712c9SDave Chinner */ 45530f712c9SDave Chinner be32_add_cpu(&btp->count, 1); 45630f712c9SDave Chinner /* 45730f712c9SDave Chinner * If we now need to rebuild the bestfree map, do so. 45830f712c9SDave Chinner * This needs to happen before the next call to use_free. 45930f712c9SDave Chinner */ 46030f712c9SDave Chinner if (needscan) { 461ae42976dSChristoph Hellwig xfs_dir2_data_freescan(dp->i_mount, hdr, &needlog); 46230f712c9SDave Chinner needscan = 0; 46330f712c9SDave Chinner } 46430f712c9SDave Chinner /* 46530f712c9SDave Chinner * Adjust pointer to the first leaf entry, we're about to move 46630f712c9SDave Chinner * the table up one to open up space for the new leaf entry. 46730f712c9SDave Chinner * Then adjust our index to match. 46830f712c9SDave Chinner */ 46930f712c9SDave Chinner blp--; 47030f712c9SDave Chinner mid++; 47130f712c9SDave Chinner if (mid) 47230f712c9SDave Chinner memmove(blp, &blp[1], mid * sizeof(*blp)); 47330f712c9SDave Chinner lfloglow = 0; 47430f712c9SDave Chinner lfloghigh = mid; 47530f712c9SDave Chinner } 47630f712c9SDave Chinner /* 47730f712c9SDave Chinner * Use a stale leaf for our new entry. 47830f712c9SDave Chinner */ 47930f712c9SDave Chinner else { 48030f712c9SDave Chinner for (lowstale = mid; 48130f712c9SDave Chinner lowstale >= 0 && 48230f712c9SDave Chinner blp[lowstale].address != 48330f712c9SDave Chinner cpu_to_be32(XFS_DIR2_NULL_DATAPTR); 48430f712c9SDave Chinner lowstale--) 48530f712c9SDave Chinner continue; 48630f712c9SDave Chinner for (highstale = mid + 1; 48730f712c9SDave Chinner highstale < be32_to_cpu(btp->count) && 48830f712c9SDave Chinner blp[highstale].address != 48930f712c9SDave Chinner cpu_to_be32(XFS_DIR2_NULL_DATAPTR) && 49030f712c9SDave Chinner (lowstale < 0 || mid - lowstale > highstale - mid); 49130f712c9SDave Chinner highstale++) 49230f712c9SDave Chinner continue; 49330f712c9SDave Chinner /* 49430f712c9SDave Chinner * Move entries toward the low-numbered stale entry. 49530f712c9SDave Chinner */ 49630f712c9SDave Chinner if (lowstale >= 0 && 49730f712c9SDave Chinner (highstale == be32_to_cpu(btp->count) || 49830f712c9SDave Chinner mid - lowstale <= highstale - mid)) { 49930f712c9SDave Chinner if (mid - lowstale) 50030f712c9SDave Chinner memmove(&blp[lowstale], &blp[lowstale + 1], 50130f712c9SDave Chinner (mid - lowstale) * sizeof(*blp)); 5029bb54cb5SDave Chinner lfloglow = min(lowstale, lfloglow); 5039bb54cb5SDave Chinner lfloghigh = max(mid, lfloghigh); 50430f712c9SDave Chinner } 50530f712c9SDave Chinner /* 50630f712c9SDave Chinner * Move entries toward the high-numbered stale entry. 50730f712c9SDave Chinner */ 50830f712c9SDave Chinner else { 50930f712c9SDave Chinner ASSERT(highstale < be32_to_cpu(btp->count)); 51030f712c9SDave Chinner mid++; 51130f712c9SDave Chinner if (highstale - mid) 51230f712c9SDave Chinner memmove(&blp[mid + 1], &blp[mid], 51330f712c9SDave Chinner (highstale - mid) * sizeof(*blp)); 5149bb54cb5SDave Chinner lfloglow = min(mid, lfloglow); 5159bb54cb5SDave Chinner lfloghigh = max(highstale, lfloghigh); 51630f712c9SDave Chinner } 51730f712c9SDave Chinner be32_add_cpu(&btp->stale, -1); 51830f712c9SDave Chinner } 51930f712c9SDave Chinner /* 52030f712c9SDave Chinner * Point to the new data entry. 52130f712c9SDave Chinner */ 52230f712c9SDave Chinner dep = (xfs_dir2_data_entry_t *)dup; 52330f712c9SDave Chinner /* 52430f712c9SDave Chinner * Fill in the leaf entry. 52530f712c9SDave Chinner */ 52630f712c9SDave Chinner blp[mid].hashval = cpu_to_be32(args->hashval); 52730f712c9SDave Chinner blp[mid].address = cpu_to_be32(xfs_dir2_byte_to_dataptr( 52830f712c9SDave Chinner (char *)dep - (char *)hdr)); 52930f712c9SDave Chinner xfs_dir2_block_log_leaf(tp, bp, lfloglow, lfloghigh); 53030f712c9SDave Chinner /* 53130f712c9SDave Chinner * Mark space for the data entry used. 53230f712c9SDave Chinner */ 5336915ef35SDarrick J. Wong error = xfs_dir2_data_use_free(args, bp, dup, 53430f712c9SDave Chinner (xfs_dir2_data_aoff_t)((char *)dup - (char *)hdr), 53530f712c9SDave Chinner (xfs_dir2_data_aoff_t)len, &needlog, &needscan); 5366915ef35SDarrick J. Wong if (error) 5376915ef35SDarrick J. Wong return error; 53830f712c9SDave Chinner /* 53930f712c9SDave Chinner * Create the new data entry. 54030f712c9SDave Chinner */ 54130f712c9SDave Chinner dep->inumber = cpu_to_be64(args->inumber); 54230f712c9SDave Chinner dep->namelen = args->namelen; 54330f712c9SDave Chinner memcpy(dep->name, args->name, args->namelen); 54459b8b465SChristoph Hellwig xfs_dir2_data_put_ftype(dp->i_mount, dep, args->filetype); 5457e8ae7bdSChristoph Hellwig tagp = xfs_dir2_data_entry_tag_p(dp->i_mount, dep); 54630f712c9SDave Chinner *tagp = cpu_to_be16((char *)dep - (char *)hdr); 54730f712c9SDave Chinner /* 54830f712c9SDave Chinner * Clean up the bestfree array and log the header, tail, and entry. 54930f712c9SDave Chinner */ 55030f712c9SDave Chinner if (needscan) 551ae42976dSChristoph Hellwig xfs_dir2_data_freescan(dp->i_mount, hdr, &needlog); 55230f712c9SDave Chinner if (needlog) 55330f712c9SDave Chinner xfs_dir2_data_log_header(args, bp); 55430f712c9SDave Chinner xfs_dir2_block_log_tail(tp, bp); 55530f712c9SDave Chinner xfs_dir2_data_log_entry(args, bp, dep); 55630f712c9SDave Chinner xfs_dir3_data_check(dp, bp); 55730f712c9SDave Chinner return 0; 55830f712c9SDave Chinner } 55930f712c9SDave Chinner 56030f712c9SDave Chinner /* 56130f712c9SDave Chinner * Log leaf entries from the block. 56230f712c9SDave Chinner */ 56330f712c9SDave Chinner static void 56430f712c9SDave Chinner xfs_dir2_block_log_leaf( 56530f712c9SDave Chinner xfs_trans_t *tp, /* transaction structure */ 56630f712c9SDave Chinner struct xfs_buf *bp, /* block buffer */ 56730f712c9SDave Chinner int first, /* index of first logged leaf */ 56830f712c9SDave Chinner int last) /* index of last logged leaf */ 56930f712c9SDave Chinner { 57030f712c9SDave Chinner xfs_dir2_data_hdr_t *hdr = bp->b_addr; 57130f712c9SDave Chinner xfs_dir2_leaf_entry_t *blp; 57230f712c9SDave Chinner xfs_dir2_block_tail_t *btp; 57330f712c9SDave Chinner 57430f712c9SDave Chinner btp = xfs_dir2_block_tail_p(tp->t_mountp->m_dir_geo, hdr); 57530f712c9SDave Chinner blp = xfs_dir2_block_leaf_p(btp); 57630f712c9SDave Chinner xfs_trans_log_buf(tp, bp, (uint)((char *)&blp[first] - (char *)hdr), 57730f712c9SDave Chinner (uint)((char *)&blp[last + 1] - (char *)hdr - 1)); 57830f712c9SDave Chinner } 57930f712c9SDave Chinner 58030f712c9SDave Chinner /* 58130f712c9SDave Chinner * Log the block tail. 58230f712c9SDave Chinner */ 58330f712c9SDave Chinner static void 58430f712c9SDave Chinner xfs_dir2_block_log_tail( 58530f712c9SDave Chinner xfs_trans_t *tp, /* transaction structure */ 58630f712c9SDave Chinner struct xfs_buf *bp) /* block buffer */ 58730f712c9SDave Chinner { 58830f712c9SDave Chinner xfs_dir2_data_hdr_t *hdr = bp->b_addr; 58930f712c9SDave Chinner xfs_dir2_block_tail_t *btp; 59030f712c9SDave Chinner 59130f712c9SDave Chinner btp = xfs_dir2_block_tail_p(tp->t_mountp->m_dir_geo, hdr); 59230f712c9SDave Chinner xfs_trans_log_buf(tp, bp, (uint)((char *)btp - (char *)hdr), 59330f712c9SDave Chinner (uint)((char *)(btp + 1) - (char *)hdr - 1)); 59430f712c9SDave Chinner } 59530f712c9SDave Chinner 59630f712c9SDave Chinner /* 59730f712c9SDave Chinner * Look up an entry in the block. This is the external routine, 59830f712c9SDave Chinner * xfs_dir2_block_lookup_int does the real work. 59930f712c9SDave Chinner */ 60030f712c9SDave Chinner int /* error */ 60130f712c9SDave Chinner xfs_dir2_block_lookup( 60230f712c9SDave Chinner xfs_da_args_t *args) /* dir lookup arguments */ 60330f712c9SDave Chinner { 60430f712c9SDave Chinner xfs_dir2_data_hdr_t *hdr; /* block header */ 60530f712c9SDave Chinner xfs_dir2_leaf_entry_t *blp; /* block leaf entries */ 60630f712c9SDave Chinner struct xfs_buf *bp; /* block buffer */ 60730f712c9SDave Chinner xfs_dir2_block_tail_t *btp; /* block tail */ 60830f712c9SDave Chinner xfs_dir2_data_entry_t *dep; /* block data entry */ 60930f712c9SDave Chinner xfs_inode_t *dp; /* incore inode */ 61030f712c9SDave Chinner int ent; /* entry index */ 61130f712c9SDave Chinner int error; /* error return value */ 61230f712c9SDave Chinner 61330f712c9SDave Chinner trace_xfs_dir2_block_lookup(args); 61430f712c9SDave Chinner 61530f712c9SDave Chinner /* 61630f712c9SDave Chinner * Get the buffer, look up the entry. 61730f712c9SDave Chinner * If not found (ENOENT) then return, have no buffer. 61830f712c9SDave Chinner */ 61930f712c9SDave Chinner if ((error = xfs_dir2_block_lookup_int(args, &bp, &ent))) 62030f712c9SDave Chinner return error; 62130f712c9SDave Chinner dp = args->dp; 62230f712c9SDave Chinner hdr = bp->b_addr; 62330f712c9SDave Chinner xfs_dir3_data_check(dp, bp); 62430f712c9SDave Chinner btp = xfs_dir2_block_tail_p(args->geo, hdr); 62530f712c9SDave Chinner blp = xfs_dir2_block_leaf_p(btp); 62630f712c9SDave Chinner /* 62730f712c9SDave Chinner * Get the offset from the leaf entry, to point to the data. 62830f712c9SDave Chinner */ 62930f712c9SDave Chinner dep = (xfs_dir2_data_entry_t *)((char *)hdr + 63030f712c9SDave Chinner xfs_dir2_dataptr_to_off(args->geo, 63130f712c9SDave Chinner be32_to_cpu(blp[ent].address))); 63230f712c9SDave Chinner /* 63330f712c9SDave Chinner * Fill in inode number, CI name if appropriate, release the block. 63430f712c9SDave Chinner */ 63530f712c9SDave Chinner args->inumber = be64_to_cpu(dep->inumber); 63659b8b465SChristoph Hellwig args->filetype = xfs_dir2_data_get_ftype(dp->i_mount, dep); 63730f712c9SDave Chinner error = xfs_dir_cilookup_result(args, dep->name, dep->namelen); 63830f712c9SDave Chinner xfs_trans_brelse(args->trans, bp); 63930f712c9SDave Chinner return error; 64030f712c9SDave Chinner } 64130f712c9SDave Chinner 64230f712c9SDave Chinner /* 64330f712c9SDave Chinner * Internal block lookup routine. 64430f712c9SDave Chinner */ 64530f712c9SDave Chinner static int /* error */ 64630f712c9SDave Chinner xfs_dir2_block_lookup_int( 64730f712c9SDave Chinner xfs_da_args_t *args, /* dir lookup arguments */ 64830f712c9SDave Chinner struct xfs_buf **bpp, /* returned block buffer */ 64930f712c9SDave Chinner int *entno) /* returned entry number */ 65030f712c9SDave Chinner { 65130f712c9SDave Chinner xfs_dir2_dataptr_t addr; /* data entry address */ 65230f712c9SDave Chinner xfs_dir2_data_hdr_t *hdr; /* block header */ 65330f712c9SDave Chinner xfs_dir2_leaf_entry_t *blp; /* block leaf entries */ 65430f712c9SDave Chinner struct xfs_buf *bp; /* block buffer */ 65530f712c9SDave Chinner xfs_dir2_block_tail_t *btp; /* block tail */ 65630f712c9SDave Chinner xfs_dir2_data_entry_t *dep; /* block data entry */ 65730f712c9SDave Chinner xfs_inode_t *dp; /* incore inode */ 65830f712c9SDave Chinner int error; /* error return value */ 65930f712c9SDave Chinner xfs_dahash_t hash; /* found hash value */ 66030f712c9SDave Chinner int high; /* binary search high index */ 66130f712c9SDave Chinner int low; /* binary search low index */ 66230f712c9SDave Chinner int mid; /* binary search current idx */ 66330f712c9SDave Chinner xfs_trans_t *tp; /* transaction pointer */ 66430f712c9SDave Chinner enum xfs_dacmp cmp; /* comparison result */ 66530f712c9SDave Chinner 66630f712c9SDave Chinner dp = args->dp; 66730f712c9SDave Chinner tp = args->trans; 66830f712c9SDave Chinner 66930f712c9SDave Chinner error = xfs_dir3_block_read(tp, dp, &bp); 67030f712c9SDave Chinner if (error) 67130f712c9SDave Chinner return error; 67230f712c9SDave Chinner 67330f712c9SDave Chinner hdr = bp->b_addr; 67430f712c9SDave Chinner xfs_dir3_data_check(dp, bp); 67530f712c9SDave Chinner btp = xfs_dir2_block_tail_p(args->geo, hdr); 67630f712c9SDave Chinner blp = xfs_dir2_block_leaf_p(btp); 67730f712c9SDave Chinner /* 67830f712c9SDave Chinner * Loop doing a binary search for our hash value. 67930f712c9SDave Chinner * Find our entry, ENOENT if it's not there. 68030f712c9SDave Chinner */ 68130f712c9SDave Chinner for (low = 0, high = be32_to_cpu(btp->count) - 1; ; ) { 68230f712c9SDave Chinner ASSERT(low <= high); 68330f712c9SDave Chinner mid = (low + high) >> 1; 68430f712c9SDave Chinner if ((hash = be32_to_cpu(blp[mid].hashval)) == args->hashval) 68530f712c9SDave Chinner break; 68630f712c9SDave Chinner if (hash < args->hashval) 68730f712c9SDave Chinner low = mid + 1; 68830f712c9SDave Chinner else 68930f712c9SDave Chinner high = mid - 1; 69030f712c9SDave Chinner if (low > high) { 69130f712c9SDave Chinner ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); 69230f712c9SDave Chinner xfs_trans_brelse(tp, bp); 6932451337dSDave Chinner return -ENOENT; 69430f712c9SDave Chinner } 69530f712c9SDave Chinner } 69630f712c9SDave Chinner /* 69730f712c9SDave Chinner * Back up to the first one with the right hash value. 69830f712c9SDave Chinner */ 69930f712c9SDave Chinner while (mid > 0 && be32_to_cpu(blp[mid - 1].hashval) == args->hashval) { 70030f712c9SDave Chinner mid--; 70130f712c9SDave Chinner } 70230f712c9SDave Chinner /* 70330f712c9SDave Chinner * Now loop forward through all the entries with the 70430f712c9SDave Chinner * right hash value looking for our name. 70530f712c9SDave Chinner */ 70630f712c9SDave Chinner do { 70730f712c9SDave Chinner if ((addr = be32_to_cpu(blp[mid].address)) == XFS_DIR2_NULL_DATAPTR) 70830f712c9SDave Chinner continue; 70930f712c9SDave Chinner /* 71030f712c9SDave Chinner * Get pointer to the entry from the leaf. 71130f712c9SDave Chinner */ 71230f712c9SDave Chinner dep = (xfs_dir2_data_entry_t *) 71330f712c9SDave Chinner ((char *)hdr + xfs_dir2_dataptr_to_off(args->geo, addr)); 71430f712c9SDave Chinner /* 71530f712c9SDave Chinner * Compare name and if it's an exact match, return the index 71630f712c9SDave Chinner * and buffer. If it's the first case-insensitive match, store 71730f712c9SDave Chinner * the index and buffer and continue looking for an exact match. 71830f712c9SDave Chinner */ 719d8d11fc7SChristoph Hellwig cmp = xfs_dir2_compname(args, dep->name, dep->namelen); 72030f712c9SDave Chinner if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) { 72130f712c9SDave Chinner args->cmpresult = cmp; 72230f712c9SDave Chinner *bpp = bp; 72330f712c9SDave Chinner *entno = mid; 72430f712c9SDave Chinner if (cmp == XFS_CMP_EXACT) 72530f712c9SDave Chinner return 0; 72630f712c9SDave Chinner } 72730f712c9SDave Chinner } while (++mid < be32_to_cpu(btp->count) && 72830f712c9SDave Chinner be32_to_cpu(blp[mid].hashval) == hash); 72930f712c9SDave Chinner 73030f712c9SDave Chinner ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); 73130f712c9SDave Chinner /* 73230f712c9SDave Chinner * Here, we can only be doing a lookup (not a rename or replace). 73330f712c9SDave Chinner * If a case-insensitive match was found earlier, return success. 73430f712c9SDave Chinner */ 73530f712c9SDave Chinner if (args->cmpresult == XFS_CMP_CASE) 73630f712c9SDave Chinner return 0; 73730f712c9SDave Chinner /* 73830f712c9SDave Chinner * No match, release the buffer and return ENOENT. 73930f712c9SDave Chinner */ 74030f712c9SDave Chinner xfs_trans_brelse(tp, bp); 7412451337dSDave Chinner return -ENOENT; 74230f712c9SDave Chinner } 74330f712c9SDave Chinner 74430f712c9SDave Chinner /* 74530f712c9SDave Chinner * Remove an entry from a block format directory. 74630f712c9SDave Chinner * If that makes the block small enough to fit in shortform, transform it. 74730f712c9SDave Chinner */ 74830f712c9SDave Chinner int /* error */ 74930f712c9SDave Chinner xfs_dir2_block_removename( 75030f712c9SDave Chinner xfs_da_args_t *args) /* directory operation args */ 75130f712c9SDave Chinner { 75230f712c9SDave Chinner xfs_dir2_data_hdr_t *hdr; /* block header */ 75330f712c9SDave Chinner xfs_dir2_leaf_entry_t *blp; /* block leaf pointer */ 75430f712c9SDave Chinner struct xfs_buf *bp; /* block buffer */ 75530f712c9SDave Chinner xfs_dir2_block_tail_t *btp; /* block tail */ 75630f712c9SDave Chinner xfs_dir2_data_entry_t *dep; /* block data entry */ 75730f712c9SDave Chinner xfs_inode_t *dp; /* incore inode */ 75830f712c9SDave Chinner int ent; /* block leaf entry index */ 75930f712c9SDave Chinner int error; /* error return value */ 76030f712c9SDave Chinner int needlog; /* need to log block header */ 76130f712c9SDave Chinner int needscan; /* need to fixup bestfree */ 76230f712c9SDave Chinner xfs_dir2_sf_hdr_t sfh; /* shortform header */ 76330f712c9SDave Chinner int size; /* shortform size */ 76430f712c9SDave Chinner xfs_trans_t *tp; /* transaction pointer */ 76530f712c9SDave Chinner 76630f712c9SDave Chinner trace_xfs_dir2_block_removename(args); 76730f712c9SDave Chinner 76830f712c9SDave Chinner /* 76930f712c9SDave Chinner * Look up the entry in the block. Gets the buffer and entry index. 77030f712c9SDave Chinner * It will always be there, the vnodeops level does a lookup first. 77130f712c9SDave Chinner */ 77230f712c9SDave Chinner if ((error = xfs_dir2_block_lookup_int(args, &bp, &ent))) { 77330f712c9SDave Chinner return error; 77430f712c9SDave Chinner } 77530f712c9SDave Chinner dp = args->dp; 77630f712c9SDave Chinner tp = args->trans; 77730f712c9SDave Chinner hdr = bp->b_addr; 77830f712c9SDave Chinner btp = xfs_dir2_block_tail_p(args->geo, hdr); 77930f712c9SDave Chinner blp = xfs_dir2_block_leaf_p(btp); 78030f712c9SDave Chinner /* 78130f712c9SDave Chinner * Point to the data entry using the leaf entry. 78230f712c9SDave Chinner */ 78330f712c9SDave Chinner dep = (xfs_dir2_data_entry_t *)((char *)hdr + 78430f712c9SDave Chinner xfs_dir2_dataptr_to_off(args->geo, 78530f712c9SDave Chinner be32_to_cpu(blp[ent].address))); 78630f712c9SDave Chinner /* 78730f712c9SDave Chinner * Mark the data entry's space free. 78830f712c9SDave Chinner */ 78930f712c9SDave Chinner needlog = needscan = 0; 79030f712c9SDave Chinner xfs_dir2_data_make_free(args, bp, 79130f712c9SDave Chinner (xfs_dir2_data_aoff_t)((char *)dep - (char *)hdr), 792fdbb8c5bSChristoph Hellwig xfs_dir2_data_entsize(dp->i_mount, dep->namelen), &needlog, 793fdbb8c5bSChristoph Hellwig &needscan); 79430f712c9SDave Chinner /* 79530f712c9SDave Chinner * Fix up the block tail. 79630f712c9SDave Chinner */ 79730f712c9SDave Chinner be32_add_cpu(&btp->stale, 1); 79830f712c9SDave Chinner xfs_dir2_block_log_tail(tp, bp); 79930f712c9SDave Chinner /* 80030f712c9SDave Chinner * Remove the leaf entry by marking it stale. 80130f712c9SDave Chinner */ 80230f712c9SDave Chinner blp[ent].address = cpu_to_be32(XFS_DIR2_NULL_DATAPTR); 80330f712c9SDave Chinner xfs_dir2_block_log_leaf(tp, bp, ent, ent); 80430f712c9SDave Chinner /* 80530f712c9SDave Chinner * Fix up bestfree, log the header if necessary. 80630f712c9SDave Chinner */ 80730f712c9SDave Chinner if (needscan) 808ae42976dSChristoph Hellwig xfs_dir2_data_freescan(dp->i_mount, hdr, &needlog); 80930f712c9SDave Chinner if (needlog) 81030f712c9SDave Chinner xfs_dir2_data_log_header(args, bp); 81130f712c9SDave Chinner xfs_dir3_data_check(dp, bp); 81230f712c9SDave Chinner /* 81330f712c9SDave Chinner * See if the size as a shortform is good enough. 81430f712c9SDave Chinner */ 81530f712c9SDave Chinner size = xfs_dir2_block_sfsize(dp, hdr, &sfh); 81630f712c9SDave Chinner if (size > XFS_IFORK_DSIZE(dp)) 81730f712c9SDave Chinner return 0; 81830f712c9SDave Chinner 81930f712c9SDave Chinner /* 82030f712c9SDave Chinner * If it works, do the conversion. 82130f712c9SDave Chinner */ 82230f712c9SDave Chinner return xfs_dir2_block_to_sf(args, bp, size, &sfh); 82330f712c9SDave Chinner } 82430f712c9SDave Chinner 82530f712c9SDave Chinner /* 82630f712c9SDave Chinner * Replace an entry in a V2 block directory. 82730f712c9SDave Chinner * Change the inode number to the new value. 82830f712c9SDave Chinner */ 82930f712c9SDave Chinner int /* error */ 83030f712c9SDave Chinner xfs_dir2_block_replace( 83130f712c9SDave Chinner xfs_da_args_t *args) /* directory operation args */ 83230f712c9SDave Chinner { 83330f712c9SDave Chinner xfs_dir2_data_hdr_t *hdr; /* block header */ 83430f712c9SDave Chinner xfs_dir2_leaf_entry_t *blp; /* block leaf entries */ 83530f712c9SDave Chinner struct xfs_buf *bp; /* block buffer */ 83630f712c9SDave Chinner xfs_dir2_block_tail_t *btp; /* block tail */ 83730f712c9SDave Chinner xfs_dir2_data_entry_t *dep; /* block data entry */ 83830f712c9SDave Chinner xfs_inode_t *dp; /* incore inode */ 83930f712c9SDave Chinner int ent; /* leaf entry index */ 84030f712c9SDave Chinner int error; /* error return value */ 84130f712c9SDave Chinner 84230f712c9SDave Chinner trace_xfs_dir2_block_replace(args); 84330f712c9SDave Chinner 84430f712c9SDave Chinner /* 84530f712c9SDave Chinner * Lookup the entry in the directory. Get buffer and entry index. 84630f712c9SDave Chinner * This will always succeed since the caller has already done a lookup. 84730f712c9SDave Chinner */ 84830f712c9SDave Chinner if ((error = xfs_dir2_block_lookup_int(args, &bp, &ent))) { 84930f712c9SDave Chinner return error; 85030f712c9SDave Chinner } 85130f712c9SDave Chinner dp = args->dp; 85230f712c9SDave Chinner hdr = bp->b_addr; 85330f712c9SDave Chinner btp = xfs_dir2_block_tail_p(args->geo, hdr); 85430f712c9SDave Chinner blp = xfs_dir2_block_leaf_p(btp); 85530f712c9SDave Chinner /* 85630f712c9SDave Chinner * Point to the data entry we need to change. 85730f712c9SDave Chinner */ 85830f712c9SDave Chinner dep = (xfs_dir2_data_entry_t *)((char *)hdr + 85930f712c9SDave Chinner xfs_dir2_dataptr_to_off(args->geo, 86030f712c9SDave Chinner be32_to_cpu(blp[ent].address))); 86130f712c9SDave Chinner ASSERT(be64_to_cpu(dep->inumber) != args->inumber); 86230f712c9SDave Chinner /* 86330f712c9SDave Chinner * Change the inode number to the new value. 86430f712c9SDave Chinner */ 86530f712c9SDave Chinner dep->inumber = cpu_to_be64(args->inumber); 86659b8b465SChristoph Hellwig xfs_dir2_data_put_ftype(dp->i_mount, dep, args->filetype); 86730f712c9SDave Chinner xfs_dir2_data_log_entry(args, bp, dep); 86830f712c9SDave Chinner xfs_dir3_data_check(dp, bp); 86930f712c9SDave Chinner return 0; 87030f712c9SDave Chinner } 87130f712c9SDave Chinner 87230f712c9SDave Chinner /* 87330f712c9SDave Chinner * Qsort comparison routine for the block leaf entries. 87430f712c9SDave Chinner */ 87530f712c9SDave Chinner static int /* sort order */ 87630f712c9SDave Chinner xfs_dir2_block_sort( 87730f712c9SDave Chinner const void *a, /* first leaf entry */ 87830f712c9SDave Chinner const void *b) /* second leaf entry */ 87930f712c9SDave Chinner { 88030f712c9SDave Chinner const xfs_dir2_leaf_entry_t *la; /* first leaf entry */ 88130f712c9SDave Chinner const xfs_dir2_leaf_entry_t *lb; /* second leaf entry */ 88230f712c9SDave Chinner 88330f712c9SDave Chinner la = a; 88430f712c9SDave Chinner lb = b; 88530f712c9SDave Chinner return be32_to_cpu(la->hashval) < be32_to_cpu(lb->hashval) ? -1 : 88630f712c9SDave Chinner (be32_to_cpu(la->hashval) > be32_to_cpu(lb->hashval) ? 1 : 0); 88730f712c9SDave Chinner } 88830f712c9SDave Chinner 88930f712c9SDave Chinner /* 89030f712c9SDave Chinner * Convert a V2 leaf directory to a V2 block directory if possible. 89130f712c9SDave Chinner */ 89230f712c9SDave Chinner int /* error */ 89330f712c9SDave Chinner xfs_dir2_leaf_to_block( 89430f712c9SDave Chinner xfs_da_args_t *args, /* operation arguments */ 89530f712c9SDave Chinner struct xfs_buf *lbp, /* leaf buffer */ 89630f712c9SDave Chinner struct xfs_buf *dbp) /* data buffer */ 89730f712c9SDave Chinner { 89830f712c9SDave Chinner __be16 *bestsp; /* leaf bests table */ 89930f712c9SDave Chinner xfs_dir2_data_hdr_t *hdr; /* block header */ 90030f712c9SDave Chinner xfs_dir2_block_tail_t *btp; /* block tail */ 90130f712c9SDave Chinner xfs_inode_t *dp; /* incore directory inode */ 90230f712c9SDave Chinner xfs_dir2_data_unused_t *dup; /* unused data entry */ 90330f712c9SDave Chinner int error; /* error return value */ 90430f712c9SDave Chinner int from; /* leaf from index */ 90530f712c9SDave Chinner xfs_dir2_leaf_t *leaf; /* leaf structure */ 90630f712c9SDave Chinner xfs_dir2_leaf_entry_t *lep; /* leaf entry */ 90730f712c9SDave Chinner xfs_dir2_leaf_tail_t *ltp; /* leaf tail structure */ 90830f712c9SDave Chinner xfs_mount_t *mp; /* file system mount point */ 90930f712c9SDave Chinner int needlog; /* need to log data header */ 91030f712c9SDave Chinner int needscan; /* need to scan for bestfree */ 91130f712c9SDave Chinner xfs_dir2_sf_hdr_t sfh; /* shortform header */ 91230f712c9SDave Chinner int size; /* bytes used */ 91330f712c9SDave Chinner __be16 *tagp; /* end of entry (tag) */ 91430f712c9SDave Chinner int to; /* block/leaf to index */ 91530f712c9SDave Chinner xfs_trans_t *tp; /* transaction pointer */ 91630f712c9SDave Chinner struct xfs_dir3_icleaf_hdr leafhdr; 91730f712c9SDave Chinner 91830f712c9SDave Chinner trace_xfs_dir2_leaf_to_block(args); 91930f712c9SDave Chinner 92030f712c9SDave Chinner dp = args->dp; 92130f712c9SDave Chinner tp = args->trans; 92230f712c9SDave Chinner mp = dp->i_mount; 92330f712c9SDave Chinner leaf = lbp->b_addr; 92451842556SChristoph Hellwig xfs_dir2_leaf_hdr_from_disk(mp, &leafhdr, leaf); 92530f712c9SDave Chinner ltp = xfs_dir2_leaf_tail_p(args->geo, leaf); 92630f712c9SDave Chinner 92730f712c9SDave Chinner ASSERT(leafhdr.magic == XFS_DIR2_LEAF1_MAGIC || 92830f712c9SDave Chinner leafhdr.magic == XFS_DIR3_LEAF1_MAGIC); 92930f712c9SDave Chinner /* 93030f712c9SDave Chinner * If there are data blocks other than the first one, take this 93130f712c9SDave Chinner * opportunity to remove trailing empty data blocks that may have 93230f712c9SDave Chinner * been left behind during no-space-reservation operations. 93330f712c9SDave Chinner * These will show up in the leaf bests table. 93430f712c9SDave Chinner */ 93530f712c9SDave Chinner while (dp->i_d.di_size > args->geo->blksize) { 93630f712c9SDave Chinner int hdrsz; 93730f712c9SDave Chinner 938d73e1ceeSChristoph Hellwig hdrsz = args->geo->data_entry_offset; 93930f712c9SDave Chinner bestsp = xfs_dir2_leaf_bests_p(ltp); 94030f712c9SDave Chinner if (be16_to_cpu(bestsp[be32_to_cpu(ltp->bestcount) - 1]) == 94130f712c9SDave Chinner args->geo->blksize - hdrsz) { 94230f712c9SDave Chinner if ((error = 94330f712c9SDave Chinner xfs_dir2_leaf_trim_data(args, lbp, 94430f712c9SDave Chinner (xfs_dir2_db_t)(be32_to_cpu(ltp->bestcount) - 1)))) 94530f712c9SDave Chinner return error; 94630f712c9SDave Chinner } else 94730f712c9SDave Chinner return 0; 94830f712c9SDave Chinner } 94930f712c9SDave Chinner /* 95030f712c9SDave Chinner * Read the data block if we don't already have it, give up if it fails. 95130f712c9SDave Chinner */ 95230f712c9SDave Chinner if (!dbp) { 95330f712c9SDave Chinner error = xfs_dir3_data_read(tp, dp, args->geo->datablk, -1, &dbp); 95430f712c9SDave Chinner if (error) 95530f712c9SDave Chinner return error; 95630f712c9SDave Chinner } 95730f712c9SDave Chinner hdr = dbp->b_addr; 95830f712c9SDave Chinner ASSERT(hdr->magic == cpu_to_be32(XFS_DIR2_DATA_MAGIC) || 95930f712c9SDave Chinner hdr->magic == cpu_to_be32(XFS_DIR3_DATA_MAGIC)); 96030f712c9SDave Chinner 96130f712c9SDave Chinner /* 96230f712c9SDave Chinner * Size of the "leaf" area in the block. 96330f712c9SDave Chinner */ 96430f712c9SDave Chinner size = (uint)sizeof(xfs_dir2_block_tail_t) + 96530f712c9SDave Chinner (uint)sizeof(*lep) * (leafhdr.count - leafhdr.stale); 96630f712c9SDave Chinner /* 96730f712c9SDave Chinner * Look at the last data entry. 96830f712c9SDave Chinner */ 96930f712c9SDave Chinner tagp = (__be16 *)((char *)hdr + args->geo->blksize) - 1; 97030f712c9SDave Chinner dup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp)); 97130f712c9SDave Chinner /* 97230f712c9SDave Chinner * If it's not free or is too short we can't do it. 97330f712c9SDave Chinner */ 97430f712c9SDave Chinner if (be16_to_cpu(dup->freetag) != XFS_DIR2_DATA_FREE_TAG || 97530f712c9SDave Chinner be16_to_cpu(dup->length) < size) 97630f712c9SDave Chinner return 0; 97730f712c9SDave Chinner 97830f712c9SDave Chinner /* 97930f712c9SDave Chinner * Start converting it to block form. 98030f712c9SDave Chinner */ 98130f712c9SDave Chinner xfs_dir3_block_init(mp, tp, dbp, dp); 98230f712c9SDave Chinner 98330f712c9SDave Chinner needlog = 1; 98430f712c9SDave Chinner needscan = 0; 98530f712c9SDave Chinner /* 98630f712c9SDave Chinner * Use up the space at the end of the block (blp/btp). 98730f712c9SDave Chinner */ 9886915ef35SDarrick J. Wong error = xfs_dir2_data_use_free(args, dbp, dup, 9896915ef35SDarrick J. Wong args->geo->blksize - size, size, &needlog, &needscan); 9906915ef35SDarrick J. Wong if (error) 9916915ef35SDarrick J. Wong return error; 99230f712c9SDave Chinner /* 99330f712c9SDave Chinner * Initialize the block tail. 99430f712c9SDave Chinner */ 99530f712c9SDave Chinner btp = xfs_dir2_block_tail_p(args->geo, hdr); 99630f712c9SDave Chinner btp->count = cpu_to_be32(leafhdr.count - leafhdr.stale); 99730f712c9SDave Chinner btp->stale = 0; 99830f712c9SDave Chinner xfs_dir2_block_log_tail(tp, dbp); 99930f712c9SDave Chinner /* 100030f712c9SDave Chinner * Initialize the block leaf area. We compact out stale entries. 100130f712c9SDave Chinner */ 100230f712c9SDave Chinner lep = xfs_dir2_block_leaf_p(btp); 100330f712c9SDave Chinner for (from = to = 0; from < leafhdr.count; from++) { 1004787b0893SChristoph Hellwig if (leafhdr.ents[from].address == 1005787b0893SChristoph Hellwig cpu_to_be32(XFS_DIR2_NULL_DATAPTR)) 100630f712c9SDave Chinner continue; 1007787b0893SChristoph Hellwig lep[to++] = leafhdr.ents[from]; 100830f712c9SDave Chinner } 100930f712c9SDave Chinner ASSERT(to == be32_to_cpu(btp->count)); 101030f712c9SDave Chinner xfs_dir2_block_log_leaf(tp, dbp, 0, be32_to_cpu(btp->count) - 1); 101130f712c9SDave Chinner /* 101230f712c9SDave Chinner * Scan the bestfree if we need it and log the data block header. 101330f712c9SDave Chinner */ 101430f712c9SDave Chinner if (needscan) 1015ae42976dSChristoph Hellwig xfs_dir2_data_freescan(dp->i_mount, hdr, &needlog); 101630f712c9SDave Chinner if (needlog) 101730f712c9SDave Chinner xfs_dir2_data_log_header(args, dbp); 101830f712c9SDave Chinner /* 101930f712c9SDave Chinner * Pitch the old leaf block. 102030f712c9SDave Chinner */ 102130f712c9SDave Chinner error = xfs_da_shrink_inode(args, args->geo->leafblk, lbp); 102230f712c9SDave Chinner if (error) 102330f712c9SDave Chinner return error; 102430f712c9SDave Chinner 102530f712c9SDave Chinner /* 102630f712c9SDave Chinner * Now see if the resulting block can be shrunken to shortform. 102730f712c9SDave Chinner */ 102830f712c9SDave Chinner size = xfs_dir2_block_sfsize(dp, hdr, &sfh); 102930f712c9SDave Chinner if (size > XFS_IFORK_DSIZE(dp)) 103030f712c9SDave Chinner return 0; 103130f712c9SDave Chinner 103230f712c9SDave Chinner return xfs_dir2_block_to_sf(args, dbp, size, &sfh); 103330f712c9SDave Chinner } 103430f712c9SDave Chinner 103530f712c9SDave Chinner /* 103630f712c9SDave Chinner * Convert the shortform directory to block form. 103730f712c9SDave Chinner */ 103830f712c9SDave Chinner int /* error */ 103930f712c9SDave Chinner xfs_dir2_sf_to_block( 1040da3ca0dfSChristoph Hellwig struct xfs_da_args *args) 104130f712c9SDave Chinner { 1042da3ca0dfSChristoph Hellwig struct xfs_trans *tp = args->trans; 1043da3ca0dfSChristoph Hellwig struct xfs_inode *dp = args->dp; 1044da3ca0dfSChristoph Hellwig struct xfs_mount *mp = dp->i_mount; 1045da3ca0dfSChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(dp, XFS_DATA_FORK); 1046d73e1ceeSChristoph Hellwig struct xfs_da_geometry *geo = args->geo; 104730f712c9SDave Chinner xfs_dir2_db_t blkno; /* dir-relative block # (0) */ 104830f712c9SDave Chinner xfs_dir2_data_hdr_t *hdr; /* block header */ 104930f712c9SDave Chinner xfs_dir2_leaf_entry_t *blp; /* block leaf entries */ 105030f712c9SDave Chinner struct xfs_buf *bp; /* block buffer */ 105130f712c9SDave Chinner xfs_dir2_block_tail_t *btp; /* block tail pointer */ 105230f712c9SDave Chinner xfs_dir2_data_entry_t *dep; /* data entry pointer */ 105330f712c9SDave Chinner int dummy; /* trash */ 105430f712c9SDave Chinner xfs_dir2_data_unused_t *dup; /* unused entry pointer */ 105530f712c9SDave Chinner int endoffset; /* end of data objects */ 105630f712c9SDave Chinner int error; /* error return value */ 105730f712c9SDave Chinner int i; /* index */ 105830f712c9SDave Chinner int needlog; /* need to log block header */ 105930f712c9SDave Chinner int needscan; /* need to scan block freespc */ 106030f712c9SDave Chinner int newoffset; /* offset from current entry */ 1061d73e1ceeSChristoph Hellwig unsigned int offset = geo->data_entry_offset; 106230f712c9SDave Chinner xfs_dir2_sf_entry_t *sfep; /* sf entry pointer */ 106330f712c9SDave Chinner xfs_dir2_sf_hdr_t *oldsfp; /* old shortform header */ 106430f712c9SDave Chinner xfs_dir2_sf_hdr_t *sfp; /* shortform header */ 106530f712c9SDave Chinner __be16 *tagp; /* end of data entry */ 106630f712c9SDave Chinner struct xfs_name name; 106730f712c9SDave Chinner 106830f712c9SDave Chinner trace_xfs_dir2_sf_to_block(args); 106930f712c9SDave Chinner 107030f712c9SDave Chinner ASSERT(ifp->if_flags & XFS_IFINLINE); 1071e91ec882SDarrick J. Wong ASSERT(dp->i_d.di_size >= offsetof(struct xfs_dir2_sf_hdr, parent)); 107230f712c9SDave Chinner 107330f712c9SDave Chinner oldsfp = (xfs_dir2_sf_hdr_t *)ifp->if_u1.if_data; 107430f712c9SDave Chinner 107530f712c9SDave Chinner ASSERT(ifp->if_bytes == dp->i_d.di_size); 107630f712c9SDave Chinner ASSERT(ifp->if_u1.if_data != NULL); 107730f712c9SDave Chinner ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(oldsfp->i8count)); 107830f712c9SDave Chinner ASSERT(dp->i_d.di_nextents == 0); 107930f712c9SDave Chinner 108030f712c9SDave Chinner /* 108130f712c9SDave Chinner * Copy the directory into a temporary buffer. 108230f712c9SDave Chinner * Then pitch the incore inode data so we can make extents. 108330f712c9SDave Chinner */ 1084707e0ddaSTetsuo Handa sfp = kmem_alloc(ifp->if_bytes, 0); 108530f712c9SDave Chinner memcpy(sfp, oldsfp, ifp->if_bytes); 108630f712c9SDave Chinner 108730f712c9SDave Chinner xfs_idata_realloc(dp, -ifp->if_bytes, XFS_DATA_FORK); 1088aeea4b75SBrian Foster xfs_bmap_local_to_extents_empty(tp, dp, XFS_DATA_FORK); 108930f712c9SDave Chinner dp->i_d.di_size = 0; 109030f712c9SDave Chinner 109130f712c9SDave Chinner /* 109230f712c9SDave Chinner * Add block 0 to the inode. 109330f712c9SDave Chinner */ 109430f712c9SDave Chinner error = xfs_dir2_grow_inode(args, XFS_DIR2_DATA_SPACE, &blkno); 10956915ef35SDarrick J. Wong if (error) 10966915ef35SDarrick J. Wong goto out_free; 109730f712c9SDave Chinner /* 109830f712c9SDave Chinner * Initialize the data block, then convert it to block format. 109930f712c9SDave Chinner */ 110030f712c9SDave Chinner error = xfs_dir3_data_init(args, blkno, &bp); 11016915ef35SDarrick J. Wong if (error) 11026915ef35SDarrick J. Wong goto out_free; 110330f712c9SDave Chinner xfs_dir3_block_init(mp, tp, bp, dp); 110430f712c9SDave Chinner hdr = bp->b_addr; 110530f712c9SDave Chinner 110630f712c9SDave Chinner /* 110730f712c9SDave Chinner * Compute size of block "tail" area. 110830f712c9SDave Chinner */ 110930f712c9SDave Chinner i = (uint)sizeof(*btp) + 111030f712c9SDave Chinner (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t); 111130f712c9SDave Chinner /* 111230f712c9SDave Chinner * The whole thing is initialized to free by the init routine. 111330f712c9SDave Chinner * Say we're using the leaf and tail area. 111430f712c9SDave Chinner */ 1115ee641d5aSChristoph Hellwig dup = bp->b_addr + offset; 111630f712c9SDave Chinner needlog = needscan = 0; 11176915ef35SDarrick J. Wong error = xfs_dir2_data_use_free(args, bp, dup, args->geo->blksize - i, 111830f712c9SDave Chinner i, &needlog, &needscan); 11196915ef35SDarrick J. Wong if (error) 11206915ef35SDarrick J. Wong goto out_free; 112130f712c9SDave Chinner ASSERT(needscan == 0); 112230f712c9SDave Chinner /* 112330f712c9SDave Chinner * Fill in the tail. 112430f712c9SDave Chinner */ 112530f712c9SDave Chinner btp = xfs_dir2_block_tail_p(args->geo, hdr); 112630f712c9SDave Chinner btp->count = cpu_to_be32(sfp->count + 2); /* ., .. */ 112730f712c9SDave Chinner btp->stale = 0; 112830f712c9SDave Chinner blp = xfs_dir2_block_leaf_p(btp); 112930f712c9SDave Chinner endoffset = (uint)((char *)blp - (char *)hdr); 113030f712c9SDave Chinner /* 113130f712c9SDave Chinner * Remove the freespace, we'll manage it. 113230f712c9SDave Chinner */ 11336915ef35SDarrick J. Wong error = xfs_dir2_data_use_free(args, bp, dup, 113430f712c9SDave Chinner (xfs_dir2_data_aoff_t)((char *)dup - (char *)hdr), 113530f712c9SDave Chinner be16_to_cpu(dup->length), &needlog, &needscan); 11366915ef35SDarrick J. Wong if (error) 11376915ef35SDarrick J. Wong goto out_free; 1138da3ca0dfSChristoph Hellwig 113930f712c9SDave Chinner /* 114030f712c9SDave Chinner * Create entry for . 114130f712c9SDave Chinner */ 1142da3ca0dfSChristoph Hellwig dep = bp->b_addr + offset; 114330f712c9SDave Chinner dep->inumber = cpu_to_be64(dp->i_ino); 114430f712c9SDave Chinner dep->namelen = 1; 114530f712c9SDave Chinner dep->name[0] = '.'; 114659b8b465SChristoph Hellwig xfs_dir2_data_put_ftype(mp, dep, XFS_DIR3_FT_DIR); 11477e8ae7bdSChristoph Hellwig tagp = xfs_dir2_data_entry_tag_p(mp, dep); 1148da3ca0dfSChristoph Hellwig *tagp = cpu_to_be16(offset); 114930f712c9SDave Chinner xfs_dir2_data_log_entry(args, bp, dep); 115030f712c9SDave Chinner blp[0].hashval = cpu_to_be32(xfs_dir_hash_dot); 1151da3ca0dfSChristoph Hellwig blp[0].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(offset)); 1152fdbb8c5bSChristoph Hellwig offset += xfs_dir2_data_entsize(mp, dep->namelen); 1153da3ca0dfSChristoph Hellwig 115430f712c9SDave Chinner /* 115530f712c9SDave Chinner * Create entry for .. 115630f712c9SDave Chinner */ 1157da3ca0dfSChristoph Hellwig dep = bp->b_addr + offset; 115884915e1bSChristoph Hellwig dep->inumber = cpu_to_be64(xfs_dir2_sf_get_parent_ino(sfp)); 115930f712c9SDave Chinner dep->namelen = 2; 116030f712c9SDave Chinner dep->name[0] = dep->name[1] = '.'; 116159b8b465SChristoph Hellwig xfs_dir2_data_put_ftype(mp, dep, XFS_DIR3_FT_DIR); 11627e8ae7bdSChristoph Hellwig tagp = xfs_dir2_data_entry_tag_p(mp, dep); 1163da3ca0dfSChristoph Hellwig *tagp = cpu_to_be16(offset); 116430f712c9SDave Chinner xfs_dir2_data_log_entry(args, bp, dep); 116530f712c9SDave Chinner blp[1].hashval = cpu_to_be32(xfs_dir_hash_dotdot); 1166da3ca0dfSChristoph Hellwig blp[1].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(offset)); 1167fdbb8c5bSChristoph Hellwig offset += xfs_dir2_data_entsize(mp, dep->namelen); 1168da3ca0dfSChristoph Hellwig 116930f712c9SDave Chinner /* 117030f712c9SDave Chinner * Loop over existing entries, stuff them in. 117130f712c9SDave Chinner */ 117230f712c9SDave Chinner i = 0; 117330f712c9SDave Chinner if (!sfp->count) 117430f712c9SDave Chinner sfep = NULL; 117530f712c9SDave Chinner else 117630f712c9SDave Chinner sfep = xfs_dir2_sf_firstentry(sfp); 1177da3ca0dfSChristoph Hellwig 117830f712c9SDave Chinner /* 117930f712c9SDave Chinner * Need to preserve the existing offset values in the sf directory. 118030f712c9SDave Chinner * Insert holes (unused entries) where necessary. 118130f712c9SDave Chinner */ 118230f712c9SDave Chinner while (offset < endoffset) { 118330f712c9SDave Chinner /* 118430f712c9SDave Chinner * sfep is null when we reach the end of the list. 118530f712c9SDave Chinner */ 118630f712c9SDave Chinner if (sfep == NULL) 118730f712c9SDave Chinner newoffset = endoffset; 118830f712c9SDave Chinner else 118930f712c9SDave Chinner newoffset = xfs_dir2_sf_get_offset(sfep); 119030f712c9SDave Chinner /* 119130f712c9SDave Chinner * There should be a hole here, make one. 119230f712c9SDave Chinner */ 119330f712c9SDave Chinner if (offset < newoffset) { 1194da3ca0dfSChristoph Hellwig dup = bp->b_addr + offset; 119530f712c9SDave Chinner dup->freetag = cpu_to_be16(XFS_DIR2_DATA_FREE_TAG); 119630f712c9SDave Chinner dup->length = cpu_to_be16(newoffset - offset); 1197da3ca0dfSChristoph Hellwig *xfs_dir2_data_unused_tag_p(dup) = cpu_to_be16(offset); 119830f712c9SDave Chinner xfs_dir2_data_log_unused(args, bp, dup); 119930f712c9SDave Chinner xfs_dir2_data_freeinsert(hdr, 12001848b607SChristoph Hellwig xfs_dir2_data_bestfree_p(mp, hdr), 120130f712c9SDave Chinner dup, &dummy); 120230f712c9SDave Chinner offset += be16_to_cpu(dup->length); 120330f712c9SDave Chinner continue; 120430f712c9SDave Chinner } 120530f712c9SDave Chinner /* 120630f712c9SDave Chinner * Copy a real entry. 120730f712c9SDave Chinner */ 1208da3ca0dfSChristoph Hellwig dep = bp->b_addr + newoffset; 120993b1e96aSChristoph Hellwig dep->inumber = cpu_to_be64(xfs_dir2_sf_get_ino(mp, sfp, sfep)); 121030f712c9SDave Chinner dep->namelen = sfep->namelen; 121159b8b465SChristoph Hellwig xfs_dir2_data_put_ftype(mp, dep, 121259b8b465SChristoph Hellwig xfs_dir2_sf_get_ftype(mp, sfep)); 121330f712c9SDave Chinner memcpy(dep->name, sfep->name, dep->namelen); 12147e8ae7bdSChristoph Hellwig tagp = xfs_dir2_data_entry_tag_p(mp, dep); 1215da3ca0dfSChristoph Hellwig *tagp = cpu_to_be16(newoffset); 121630f712c9SDave Chinner xfs_dir2_data_log_entry(args, bp, dep); 121730f712c9SDave Chinner name.name = sfep->name; 121830f712c9SDave Chinner name.len = sfep->namelen; 1219d8d11fc7SChristoph Hellwig blp[2 + i].hashval = cpu_to_be32(xfs_dir2_hashname(mp, &name)); 1220da3ca0dfSChristoph Hellwig blp[2 + i].address = 1221da3ca0dfSChristoph Hellwig cpu_to_be32(xfs_dir2_byte_to_dataptr(newoffset)); 122230f712c9SDave Chinner offset = (int)((char *)(tagp + 1) - (char *)hdr); 122330f712c9SDave Chinner if (++i == sfp->count) 122430f712c9SDave Chinner sfep = NULL; 122530f712c9SDave Chinner else 122650f6bb6bSChristoph Hellwig sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep); 122730f712c9SDave Chinner } 122830f712c9SDave Chinner /* Done with the temporary buffer */ 122930f712c9SDave Chinner kmem_free(sfp); 123030f712c9SDave Chinner /* 123130f712c9SDave Chinner * Sort the leaf entries by hash value. 123230f712c9SDave Chinner */ 123330f712c9SDave Chinner xfs_sort(blp, be32_to_cpu(btp->count), sizeof(*blp), xfs_dir2_block_sort); 123430f712c9SDave Chinner /* 123530f712c9SDave Chinner * Log the leaf entry area and tail. 123630f712c9SDave Chinner * Already logged the header in data_init, ignore needlog. 123730f712c9SDave Chinner */ 123830f712c9SDave Chinner ASSERT(needscan == 0); 123930f712c9SDave Chinner xfs_dir2_block_log_leaf(tp, bp, 0, be32_to_cpu(btp->count) - 1); 124030f712c9SDave Chinner xfs_dir2_block_log_tail(tp, bp); 124130f712c9SDave Chinner xfs_dir3_data_check(dp, bp); 124230f712c9SDave Chinner return 0; 12436915ef35SDarrick J. Wong out_free: 12446915ef35SDarrick J. Wong kmem_free(sfp); 12456915ef35SDarrick J. Wong return error; 124630f712c9SDave Chinner } 1247