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 74*38c26bfdSDave Chinner if (xfs_has_crc(mp) && 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 99*38c26bfdSDave Chinner if (!xfs_has_crc(mp)) 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 1171b2c1a63SDarrick J. Wong static xfs_failaddr_t 1181b2c1a63SDarrick J. Wong xfs_dir3_block_header_check( 1191b2c1a63SDarrick J. Wong struct xfs_inode *dp, 1201b2c1a63SDarrick J. Wong struct xfs_buf *bp) 1211b2c1a63SDarrick J. Wong { 1221b2c1a63SDarrick J. Wong struct xfs_mount *mp = dp->i_mount; 1231b2c1a63SDarrick J. Wong 1241b2c1a63SDarrick J. Wong if (xfs_sb_version_hascrc(&mp->m_sb)) { 1251b2c1a63SDarrick J. Wong struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr; 1261b2c1a63SDarrick J. Wong 1271b2c1a63SDarrick J. Wong if (be64_to_cpu(hdr3->owner) != dp->i_ino) 1281b2c1a63SDarrick J. Wong return __this_address; 1291b2c1a63SDarrick J. Wong } 1301b2c1a63SDarrick J. Wong 1311b2c1a63SDarrick J. Wong return NULL; 1321b2c1a63SDarrick J. Wong } 1331b2c1a63SDarrick J. Wong 13430f712c9SDave Chinner int 13530f712c9SDave Chinner xfs_dir3_block_read( 13630f712c9SDave Chinner struct xfs_trans *tp, 13730f712c9SDave Chinner struct xfs_inode *dp, 13830f712c9SDave Chinner struct xfs_buf **bpp) 13930f712c9SDave Chinner { 14030f712c9SDave Chinner struct xfs_mount *mp = dp->i_mount; 1411b2c1a63SDarrick J. Wong xfs_failaddr_t fa; 14230f712c9SDave Chinner int err; 14330f712c9SDave Chinner 144cd2c9f1bSChristoph Hellwig err = xfs_da_read_buf(tp, dp, mp->m_dir_geo->datablk, 0, bpp, 14530f712c9SDave Chinner XFS_DATA_FORK, &xfs_dir3_block_buf_ops); 1461b2c1a63SDarrick J. Wong if (err || !*bpp) 1471b2c1a63SDarrick J. Wong return err; 1481b2c1a63SDarrick J. Wong 1491b2c1a63SDarrick J. Wong /* Check things that we can't do in the verifier. */ 1501b2c1a63SDarrick J. Wong fa = xfs_dir3_block_header_check(dp, *bpp); 1511b2c1a63SDarrick J. Wong if (fa) { 1521b2c1a63SDarrick J. Wong __xfs_buf_mark_corrupt(*bpp, fa); 1531b2c1a63SDarrick J. Wong xfs_trans_brelse(tp, *bpp); 1541b2c1a63SDarrick J. Wong *bpp = NULL; 1551b2c1a63SDarrick J. Wong return -EFSCORRUPTED; 1561b2c1a63SDarrick J. Wong } 1571b2c1a63SDarrick J. Wong 15830f712c9SDave Chinner xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_DIR_BLOCK_BUF); 15930f712c9SDave Chinner return err; 16030f712c9SDave Chinner } 16130f712c9SDave Chinner 16230f712c9SDave Chinner static void 16330f712c9SDave Chinner xfs_dir3_block_init( 16430f712c9SDave Chinner struct xfs_mount *mp, 16530f712c9SDave Chinner struct xfs_trans *tp, 16630f712c9SDave Chinner struct xfs_buf *bp, 16730f712c9SDave Chinner struct xfs_inode *dp) 16830f712c9SDave Chinner { 16930f712c9SDave Chinner struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr; 17030f712c9SDave Chinner 17130f712c9SDave Chinner bp->b_ops = &xfs_dir3_block_buf_ops; 17230f712c9SDave Chinner xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DIR_BLOCK_BUF); 17330f712c9SDave Chinner 174*38c26bfdSDave Chinner if (xfs_has_crc(mp)) { 17530f712c9SDave Chinner memset(hdr3, 0, sizeof(*hdr3)); 17630f712c9SDave Chinner hdr3->magic = cpu_to_be32(XFS_DIR3_BLOCK_MAGIC); 17730f712c9SDave Chinner hdr3->blkno = cpu_to_be64(bp->b_bn); 17830f712c9SDave Chinner hdr3->owner = cpu_to_be64(dp->i_ino); 179ce748eaaSEric Sandeen uuid_copy(&hdr3->uuid, &mp->m_sb.sb_meta_uuid); 18030f712c9SDave Chinner return; 18130f712c9SDave Chinner 18230f712c9SDave Chinner } 18330f712c9SDave Chinner hdr3->magic = cpu_to_be32(XFS_DIR2_BLOCK_MAGIC); 18430f712c9SDave Chinner } 18530f712c9SDave Chinner 18630f712c9SDave Chinner static void 18730f712c9SDave Chinner xfs_dir2_block_need_space( 18830f712c9SDave Chinner struct xfs_inode *dp, 18930f712c9SDave Chinner struct xfs_dir2_data_hdr *hdr, 19030f712c9SDave Chinner struct xfs_dir2_block_tail *btp, 19130f712c9SDave Chinner struct xfs_dir2_leaf_entry *blp, 19230f712c9SDave Chinner __be16 **tagpp, 19330f712c9SDave Chinner struct xfs_dir2_data_unused **dupp, 19430f712c9SDave Chinner struct xfs_dir2_data_unused **enddupp, 19530f712c9SDave Chinner int *compact, 19630f712c9SDave Chinner int len) 19730f712c9SDave Chinner { 19830f712c9SDave Chinner struct xfs_dir2_data_free *bf; 19930f712c9SDave Chinner __be16 *tagp = NULL; 20030f712c9SDave Chinner struct xfs_dir2_data_unused *dup = NULL; 20130f712c9SDave Chinner struct xfs_dir2_data_unused *enddup = NULL; 20230f712c9SDave Chinner 20330f712c9SDave Chinner *compact = 0; 2041848b607SChristoph Hellwig bf = xfs_dir2_data_bestfree_p(dp->i_mount, hdr); 20530f712c9SDave Chinner 20630f712c9SDave Chinner /* 20730f712c9SDave Chinner * If there are stale entries we'll use one for the leaf. 20830f712c9SDave Chinner */ 20930f712c9SDave Chinner if (btp->stale) { 21030f712c9SDave Chinner if (be16_to_cpu(bf[0].length) >= len) { 21130f712c9SDave Chinner /* 21230f712c9SDave Chinner * The biggest entry enough to avoid compaction. 21330f712c9SDave Chinner */ 21430f712c9SDave Chinner dup = (xfs_dir2_data_unused_t *) 21530f712c9SDave Chinner ((char *)hdr + be16_to_cpu(bf[0].offset)); 21630f712c9SDave Chinner goto out; 21730f712c9SDave Chinner } 21830f712c9SDave Chinner 21930f712c9SDave Chinner /* 22030f712c9SDave Chinner * Will need to compact to make this work. 22130f712c9SDave Chinner * Tag just before the first leaf entry. 22230f712c9SDave Chinner */ 22330f712c9SDave Chinner *compact = 1; 22430f712c9SDave Chinner tagp = (__be16 *)blp - 1; 22530f712c9SDave Chinner 22630f712c9SDave Chinner /* Data object just before the first leaf entry. */ 22730f712c9SDave Chinner dup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp)); 22830f712c9SDave Chinner 22930f712c9SDave Chinner /* 23030f712c9SDave Chinner * If it's not free then the data will go where the 23130f712c9SDave Chinner * leaf data starts now, if it works at all. 23230f712c9SDave Chinner */ 23330f712c9SDave Chinner if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) { 23430f712c9SDave Chinner if (be16_to_cpu(dup->length) + (be32_to_cpu(btp->stale) - 1) * 23530f712c9SDave Chinner (uint)sizeof(*blp) < len) 23630f712c9SDave Chinner dup = NULL; 23730f712c9SDave Chinner } else if ((be32_to_cpu(btp->stale) - 1) * (uint)sizeof(*blp) < len) 23830f712c9SDave Chinner dup = NULL; 23930f712c9SDave Chinner else 24030f712c9SDave Chinner dup = (xfs_dir2_data_unused_t *)blp; 24130f712c9SDave Chinner goto out; 24230f712c9SDave Chinner } 24330f712c9SDave Chinner 24430f712c9SDave Chinner /* 24530f712c9SDave Chinner * no stale entries, so just use free space. 24630f712c9SDave Chinner * Tag just before the first leaf entry. 24730f712c9SDave Chinner */ 24830f712c9SDave Chinner tagp = (__be16 *)blp - 1; 24930f712c9SDave Chinner 25030f712c9SDave Chinner /* Data object just before the first leaf entry. */ 25130f712c9SDave Chinner enddup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp)); 25230f712c9SDave Chinner 25330f712c9SDave Chinner /* 25430f712c9SDave Chinner * If it's not free then can't do this add without cleaning up: 25530f712c9SDave Chinner * the space before the first leaf entry needs to be free so it 25630f712c9SDave Chinner * can be expanded to hold the pointer to the new entry. 25730f712c9SDave Chinner */ 25830f712c9SDave Chinner if (be16_to_cpu(enddup->freetag) == XFS_DIR2_DATA_FREE_TAG) { 25930f712c9SDave Chinner /* 26030f712c9SDave Chinner * Check out the biggest freespace and see if it's the same one. 26130f712c9SDave Chinner */ 26230f712c9SDave Chinner dup = (xfs_dir2_data_unused_t *) 26330f712c9SDave Chinner ((char *)hdr + be16_to_cpu(bf[0].offset)); 26430f712c9SDave Chinner if (dup != enddup) { 26530f712c9SDave Chinner /* 26630f712c9SDave Chinner * Not the same free entry, just check its length. 26730f712c9SDave Chinner */ 26830f712c9SDave Chinner if (be16_to_cpu(dup->length) < len) 26930f712c9SDave Chinner dup = NULL; 27030f712c9SDave Chinner goto out; 27130f712c9SDave Chinner } 27230f712c9SDave Chinner 27330f712c9SDave Chinner /* 27430f712c9SDave Chinner * It is the biggest freespace, can it hold the leaf too? 27530f712c9SDave Chinner */ 27630f712c9SDave Chinner if (be16_to_cpu(dup->length) < len + (uint)sizeof(*blp)) { 27730f712c9SDave Chinner /* 27830f712c9SDave Chinner * Yes, use the second-largest entry instead if it works. 27930f712c9SDave Chinner */ 28030f712c9SDave Chinner if (be16_to_cpu(bf[1].length) >= len) 28130f712c9SDave Chinner dup = (xfs_dir2_data_unused_t *) 28230f712c9SDave Chinner ((char *)hdr + be16_to_cpu(bf[1].offset)); 28330f712c9SDave Chinner else 28430f712c9SDave Chinner dup = NULL; 28530f712c9SDave Chinner } 28630f712c9SDave Chinner } 28730f712c9SDave Chinner out: 28830f712c9SDave Chinner *tagpp = tagp; 28930f712c9SDave Chinner *dupp = dup; 29030f712c9SDave Chinner *enddupp = enddup; 29130f712c9SDave Chinner } 29230f712c9SDave Chinner 29330f712c9SDave Chinner /* 29430f712c9SDave Chinner * compact the leaf entries. 29530f712c9SDave Chinner * Leave the highest-numbered stale entry stale. 29630f712c9SDave Chinner * XXX should be the one closest to mid but mid is not yet computed. 29730f712c9SDave Chinner */ 29830f712c9SDave Chinner static void 29930f712c9SDave Chinner xfs_dir2_block_compact( 30030f712c9SDave Chinner struct xfs_da_args *args, 30130f712c9SDave Chinner struct xfs_buf *bp, 30230f712c9SDave Chinner struct xfs_dir2_data_hdr *hdr, 30330f712c9SDave Chinner struct xfs_dir2_block_tail *btp, 30430f712c9SDave Chinner struct xfs_dir2_leaf_entry *blp, 30530f712c9SDave Chinner int *needlog, 30630f712c9SDave Chinner int *lfloghigh, 30730f712c9SDave Chinner int *lfloglow) 30830f712c9SDave Chinner { 30930f712c9SDave Chinner int fromidx; /* source leaf index */ 31030f712c9SDave Chinner int toidx; /* target leaf index */ 31130f712c9SDave Chinner int needscan = 0; 31230f712c9SDave Chinner int highstale; /* high stale index */ 31330f712c9SDave Chinner 31430f712c9SDave Chinner fromidx = toidx = be32_to_cpu(btp->count) - 1; 31530f712c9SDave Chinner highstale = *lfloghigh = -1; 31630f712c9SDave Chinner for (; fromidx >= 0; fromidx--) { 31730f712c9SDave Chinner if (blp[fromidx].address == cpu_to_be32(XFS_DIR2_NULL_DATAPTR)) { 31830f712c9SDave Chinner if (highstale == -1) 31930f712c9SDave Chinner highstale = toidx; 32030f712c9SDave Chinner else { 32130f712c9SDave Chinner if (*lfloghigh == -1) 32230f712c9SDave Chinner *lfloghigh = toidx; 32330f712c9SDave Chinner continue; 32430f712c9SDave Chinner } 32530f712c9SDave Chinner } 32630f712c9SDave Chinner if (fromidx < toidx) 32730f712c9SDave Chinner blp[toidx] = blp[fromidx]; 32830f712c9SDave Chinner toidx--; 32930f712c9SDave Chinner } 33030f712c9SDave Chinner *lfloglow = toidx + 1 - (be32_to_cpu(btp->stale) - 1); 33130f712c9SDave Chinner *lfloghigh -= be32_to_cpu(btp->stale) - 1; 33230f712c9SDave Chinner be32_add_cpu(&btp->count, -(be32_to_cpu(btp->stale) - 1)); 33330f712c9SDave Chinner xfs_dir2_data_make_free(args, bp, 33430f712c9SDave Chinner (xfs_dir2_data_aoff_t)((char *)blp - (char *)hdr), 33530f712c9SDave Chinner (xfs_dir2_data_aoff_t)((be32_to_cpu(btp->stale) - 1) * sizeof(*blp)), 33630f712c9SDave Chinner needlog, &needscan); 33730f712c9SDave Chinner btp->stale = cpu_to_be32(1); 33830f712c9SDave Chinner /* 33930f712c9SDave Chinner * If we now need to rebuild the bestfree map, do so. 34030f712c9SDave Chinner * This needs to happen before the next call to use_free. 34130f712c9SDave Chinner */ 34230f712c9SDave Chinner if (needscan) 343ae42976dSChristoph Hellwig xfs_dir2_data_freescan(args->dp->i_mount, hdr, needlog); 34430f712c9SDave Chinner } 34530f712c9SDave Chinner 34630f712c9SDave Chinner /* 34730f712c9SDave Chinner * Add an entry to a block directory. 34830f712c9SDave Chinner */ 34930f712c9SDave Chinner int /* error */ 35030f712c9SDave Chinner xfs_dir2_block_addname( 35130f712c9SDave Chinner xfs_da_args_t *args) /* directory op arguments */ 35230f712c9SDave Chinner { 35330f712c9SDave Chinner xfs_dir2_data_hdr_t *hdr; /* block header */ 35430f712c9SDave Chinner xfs_dir2_leaf_entry_t *blp; /* block leaf entries */ 35530f712c9SDave Chinner struct xfs_buf *bp; /* buffer for block */ 35630f712c9SDave Chinner xfs_dir2_block_tail_t *btp; /* block tail */ 35730f712c9SDave Chinner int compact; /* need to compact leaf ents */ 35830f712c9SDave Chinner xfs_dir2_data_entry_t *dep; /* block data entry */ 35930f712c9SDave Chinner xfs_inode_t *dp; /* directory inode */ 36030f712c9SDave Chinner xfs_dir2_data_unused_t *dup; /* block unused entry */ 36130f712c9SDave Chinner int error; /* error return value */ 36230f712c9SDave Chinner xfs_dir2_data_unused_t *enddup=NULL; /* unused at end of data */ 36330f712c9SDave Chinner xfs_dahash_t hash; /* hash value of found entry */ 36430f712c9SDave Chinner int high; /* high index for binary srch */ 36530f712c9SDave Chinner int highstale; /* high stale index */ 36630f712c9SDave Chinner int lfloghigh=0; /* last final leaf to log */ 36730f712c9SDave Chinner int lfloglow=0; /* first final leaf to log */ 36830f712c9SDave Chinner int len; /* length of the new entry */ 36930f712c9SDave Chinner int low; /* low index for binary srch */ 37030f712c9SDave Chinner int lowstale; /* low stale index */ 37130f712c9SDave Chinner int mid=0; /* midpoint for binary srch */ 37230f712c9SDave Chinner int needlog; /* need to log header */ 37330f712c9SDave Chinner int needscan; /* need to rescan freespace */ 37430f712c9SDave Chinner __be16 *tagp; /* pointer to tag value */ 37530f712c9SDave Chinner xfs_trans_t *tp; /* transaction structure */ 37630f712c9SDave Chinner 37730f712c9SDave Chinner trace_xfs_dir2_block_addname(args); 37830f712c9SDave Chinner 37930f712c9SDave Chinner dp = args->dp; 38030f712c9SDave Chinner tp = args->trans; 38130f712c9SDave Chinner 38230f712c9SDave Chinner /* Read the (one and only) directory block into bp. */ 38330f712c9SDave Chinner error = xfs_dir3_block_read(tp, dp, &bp); 38430f712c9SDave Chinner if (error) 38530f712c9SDave Chinner return error; 38630f712c9SDave Chinner 387fdbb8c5bSChristoph Hellwig len = xfs_dir2_data_entsize(dp->i_mount, args->namelen); 38830f712c9SDave Chinner 38930f712c9SDave Chinner /* 39030f712c9SDave Chinner * Set up pointers to parts of the block. 39130f712c9SDave Chinner */ 39230f712c9SDave Chinner hdr = bp->b_addr; 39330f712c9SDave Chinner btp = xfs_dir2_block_tail_p(args->geo, hdr); 39430f712c9SDave Chinner blp = xfs_dir2_block_leaf_p(btp); 39530f712c9SDave Chinner 39630f712c9SDave Chinner /* 39730f712c9SDave Chinner * Find out if we can reuse stale entries or whether we need extra 39830f712c9SDave Chinner * space for entry and new leaf. 39930f712c9SDave Chinner */ 40030f712c9SDave Chinner xfs_dir2_block_need_space(dp, hdr, btp, blp, &tagp, &dup, 40130f712c9SDave Chinner &enddup, &compact, len); 40230f712c9SDave Chinner 40330f712c9SDave Chinner /* 40430f712c9SDave Chinner * Done everything we need for a space check now. 40530f712c9SDave Chinner */ 40630f712c9SDave Chinner if (args->op_flags & XFS_DA_OP_JUSTCHECK) { 40730f712c9SDave Chinner xfs_trans_brelse(tp, bp); 40830f712c9SDave Chinner if (!dup) 4092451337dSDave Chinner return -ENOSPC; 41030f712c9SDave Chinner return 0; 41130f712c9SDave Chinner } 41230f712c9SDave Chinner 41330f712c9SDave Chinner /* 41430f712c9SDave Chinner * If we don't have space for the new entry & leaf ... 41530f712c9SDave Chinner */ 41630f712c9SDave Chinner if (!dup) { 41730f712c9SDave Chinner /* Don't have a space reservation: return no-space. */ 41830f712c9SDave Chinner if (args->total == 0) 4192451337dSDave Chinner return -ENOSPC; 42030f712c9SDave Chinner /* 42130f712c9SDave Chinner * Convert to the next larger format. 42230f712c9SDave Chinner * Then add the new entry in that format. 42330f712c9SDave Chinner */ 42430f712c9SDave Chinner error = xfs_dir2_block_to_leaf(args, bp); 42530f712c9SDave Chinner if (error) 42630f712c9SDave Chinner return error; 42730f712c9SDave Chinner return xfs_dir2_leaf_addname(args); 42830f712c9SDave Chinner } 42930f712c9SDave Chinner 43030f712c9SDave Chinner needlog = needscan = 0; 43130f712c9SDave Chinner 43230f712c9SDave Chinner /* 43330f712c9SDave Chinner * If need to compact the leaf entries, do it now. 43430f712c9SDave Chinner */ 43530f712c9SDave Chinner if (compact) { 43630f712c9SDave Chinner xfs_dir2_block_compact(args, bp, hdr, btp, blp, &needlog, 43730f712c9SDave Chinner &lfloghigh, &lfloglow); 43830f712c9SDave Chinner /* recalculate blp post-compaction */ 43930f712c9SDave Chinner blp = xfs_dir2_block_leaf_p(btp); 44030f712c9SDave Chinner } else if (btp->stale) { 44130f712c9SDave Chinner /* 44230f712c9SDave Chinner * Set leaf logging boundaries to impossible state. 44330f712c9SDave Chinner * For the no-stale case they're set explicitly. 44430f712c9SDave Chinner */ 44530f712c9SDave Chinner lfloglow = be32_to_cpu(btp->count); 44630f712c9SDave Chinner lfloghigh = -1; 44730f712c9SDave Chinner } 44830f712c9SDave Chinner 44930f712c9SDave Chinner /* 45030f712c9SDave Chinner * Find the slot that's first lower than our hash value, -1 if none. 45130f712c9SDave Chinner */ 45230f712c9SDave Chinner for (low = 0, high = be32_to_cpu(btp->count) - 1; low <= high; ) { 45330f712c9SDave Chinner mid = (low + high) >> 1; 45430f712c9SDave Chinner if ((hash = be32_to_cpu(blp[mid].hashval)) == args->hashval) 45530f712c9SDave Chinner break; 45630f712c9SDave Chinner if (hash < args->hashval) 45730f712c9SDave Chinner low = mid + 1; 45830f712c9SDave Chinner else 45930f712c9SDave Chinner high = mid - 1; 46030f712c9SDave Chinner } 46130f712c9SDave Chinner while (mid >= 0 && be32_to_cpu(blp[mid].hashval) >= args->hashval) { 46230f712c9SDave Chinner mid--; 46330f712c9SDave Chinner } 46430f712c9SDave Chinner /* 46530f712c9SDave Chinner * No stale entries, will use enddup space to hold new leaf. 46630f712c9SDave Chinner */ 46730f712c9SDave Chinner if (!btp->stale) { 4686915ef35SDarrick J. Wong xfs_dir2_data_aoff_t aoff; 4696915ef35SDarrick J. Wong 47030f712c9SDave Chinner /* 47130f712c9SDave Chinner * Mark the space needed for the new leaf entry, now in use. 47230f712c9SDave Chinner */ 4736915ef35SDarrick J. Wong aoff = (xfs_dir2_data_aoff_t)((char *)enddup - (char *)hdr + 4746915ef35SDarrick J. Wong be16_to_cpu(enddup->length) - sizeof(*blp)); 4756915ef35SDarrick J. Wong error = xfs_dir2_data_use_free(args, bp, enddup, aoff, 4766915ef35SDarrick J. Wong (xfs_dir2_data_aoff_t)sizeof(*blp), &needlog, 4776915ef35SDarrick J. Wong &needscan); 4786915ef35SDarrick J. Wong if (error) 4796915ef35SDarrick J. Wong return error; 4806915ef35SDarrick J. Wong 48130f712c9SDave Chinner /* 48230f712c9SDave Chinner * Update the tail (entry count). 48330f712c9SDave Chinner */ 48430f712c9SDave Chinner be32_add_cpu(&btp->count, 1); 48530f712c9SDave Chinner /* 48630f712c9SDave Chinner * If we now need to rebuild the bestfree map, do so. 48730f712c9SDave Chinner * This needs to happen before the next call to use_free. 48830f712c9SDave Chinner */ 48930f712c9SDave Chinner if (needscan) { 490ae42976dSChristoph Hellwig xfs_dir2_data_freescan(dp->i_mount, hdr, &needlog); 49130f712c9SDave Chinner needscan = 0; 49230f712c9SDave Chinner } 49330f712c9SDave Chinner /* 49430f712c9SDave Chinner * Adjust pointer to the first leaf entry, we're about to move 49530f712c9SDave Chinner * the table up one to open up space for the new leaf entry. 49630f712c9SDave Chinner * Then adjust our index to match. 49730f712c9SDave Chinner */ 49830f712c9SDave Chinner blp--; 49930f712c9SDave Chinner mid++; 50030f712c9SDave Chinner if (mid) 50130f712c9SDave Chinner memmove(blp, &blp[1], mid * sizeof(*blp)); 50230f712c9SDave Chinner lfloglow = 0; 50330f712c9SDave Chinner lfloghigh = mid; 50430f712c9SDave Chinner } 50530f712c9SDave Chinner /* 50630f712c9SDave Chinner * Use a stale leaf for our new entry. 50730f712c9SDave Chinner */ 50830f712c9SDave Chinner else { 50930f712c9SDave Chinner for (lowstale = mid; 51030f712c9SDave Chinner lowstale >= 0 && 51130f712c9SDave Chinner blp[lowstale].address != 51230f712c9SDave Chinner cpu_to_be32(XFS_DIR2_NULL_DATAPTR); 51330f712c9SDave Chinner lowstale--) 51430f712c9SDave Chinner continue; 51530f712c9SDave Chinner for (highstale = mid + 1; 51630f712c9SDave Chinner highstale < be32_to_cpu(btp->count) && 51730f712c9SDave Chinner blp[highstale].address != 51830f712c9SDave Chinner cpu_to_be32(XFS_DIR2_NULL_DATAPTR) && 51930f712c9SDave Chinner (lowstale < 0 || mid - lowstale > highstale - mid); 52030f712c9SDave Chinner highstale++) 52130f712c9SDave Chinner continue; 52230f712c9SDave Chinner /* 52330f712c9SDave Chinner * Move entries toward the low-numbered stale entry. 52430f712c9SDave Chinner */ 52530f712c9SDave Chinner if (lowstale >= 0 && 52630f712c9SDave Chinner (highstale == be32_to_cpu(btp->count) || 52730f712c9SDave Chinner mid - lowstale <= highstale - mid)) { 52830f712c9SDave Chinner if (mid - lowstale) 52930f712c9SDave Chinner memmove(&blp[lowstale], &blp[lowstale + 1], 53030f712c9SDave Chinner (mid - lowstale) * sizeof(*blp)); 5319bb54cb5SDave Chinner lfloglow = min(lowstale, lfloglow); 5329bb54cb5SDave Chinner lfloghigh = max(mid, lfloghigh); 53330f712c9SDave Chinner } 53430f712c9SDave Chinner /* 53530f712c9SDave Chinner * Move entries toward the high-numbered stale entry. 53630f712c9SDave Chinner */ 53730f712c9SDave Chinner else { 53830f712c9SDave Chinner ASSERT(highstale < be32_to_cpu(btp->count)); 53930f712c9SDave Chinner mid++; 54030f712c9SDave Chinner if (highstale - mid) 54130f712c9SDave Chinner memmove(&blp[mid + 1], &blp[mid], 54230f712c9SDave Chinner (highstale - mid) * sizeof(*blp)); 5439bb54cb5SDave Chinner lfloglow = min(mid, lfloglow); 5449bb54cb5SDave Chinner lfloghigh = max(highstale, lfloghigh); 54530f712c9SDave Chinner } 54630f712c9SDave Chinner be32_add_cpu(&btp->stale, -1); 54730f712c9SDave Chinner } 54830f712c9SDave Chinner /* 54930f712c9SDave Chinner * Point to the new data entry. 55030f712c9SDave Chinner */ 55130f712c9SDave Chinner dep = (xfs_dir2_data_entry_t *)dup; 55230f712c9SDave Chinner /* 55330f712c9SDave Chinner * Fill in the leaf entry. 55430f712c9SDave Chinner */ 55530f712c9SDave Chinner blp[mid].hashval = cpu_to_be32(args->hashval); 55630f712c9SDave Chinner blp[mid].address = cpu_to_be32(xfs_dir2_byte_to_dataptr( 55730f712c9SDave Chinner (char *)dep - (char *)hdr)); 55830f712c9SDave Chinner xfs_dir2_block_log_leaf(tp, bp, lfloglow, lfloghigh); 55930f712c9SDave Chinner /* 56030f712c9SDave Chinner * Mark space for the data entry used. 56130f712c9SDave Chinner */ 5626915ef35SDarrick J. Wong error = xfs_dir2_data_use_free(args, bp, dup, 56330f712c9SDave Chinner (xfs_dir2_data_aoff_t)((char *)dup - (char *)hdr), 56430f712c9SDave Chinner (xfs_dir2_data_aoff_t)len, &needlog, &needscan); 5656915ef35SDarrick J. Wong if (error) 5666915ef35SDarrick J. Wong return error; 56730f712c9SDave Chinner /* 56830f712c9SDave Chinner * Create the new data entry. 56930f712c9SDave Chinner */ 57030f712c9SDave Chinner dep->inumber = cpu_to_be64(args->inumber); 57130f712c9SDave Chinner dep->namelen = args->namelen; 57230f712c9SDave Chinner memcpy(dep->name, args->name, args->namelen); 57359b8b465SChristoph Hellwig xfs_dir2_data_put_ftype(dp->i_mount, dep, args->filetype); 5747e8ae7bdSChristoph Hellwig tagp = xfs_dir2_data_entry_tag_p(dp->i_mount, dep); 57530f712c9SDave Chinner *tagp = cpu_to_be16((char *)dep - (char *)hdr); 57630f712c9SDave Chinner /* 57730f712c9SDave Chinner * Clean up the bestfree array and log the header, tail, and entry. 57830f712c9SDave Chinner */ 57930f712c9SDave Chinner if (needscan) 580ae42976dSChristoph Hellwig xfs_dir2_data_freescan(dp->i_mount, hdr, &needlog); 58130f712c9SDave Chinner if (needlog) 58230f712c9SDave Chinner xfs_dir2_data_log_header(args, bp); 58330f712c9SDave Chinner xfs_dir2_block_log_tail(tp, bp); 58430f712c9SDave Chinner xfs_dir2_data_log_entry(args, bp, dep); 58530f712c9SDave Chinner xfs_dir3_data_check(dp, bp); 58630f712c9SDave Chinner return 0; 58730f712c9SDave Chinner } 58830f712c9SDave Chinner 58930f712c9SDave Chinner /* 59030f712c9SDave Chinner * Log leaf entries from the block. 59130f712c9SDave Chinner */ 59230f712c9SDave Chinner static void 59330f712c9SDave Chinner xfs_dir2_block_log_leaf( 59430f712c9SDave Chinner xfs_trans_t *tp, /* transaction structure */ 59530f712c9SDave Chinner struct xfs_buf *bp, /* block buffer */ 59630f712c9SDave Chinner int first, /* index of first logged leaf */ 59730f712c9SDave Chinner int last) /* index of last logged leaf */ 59830f712c9SDave Chinner { 59930f712c9SDave Chinner xfs_dir2_data_hdr_t *hdr = bp->b_addr; 60030f712c9SDave Chinner xfs_dir2_leaf_entry_t *blp; 60130f712c9SDave Chinner xfs_dir2_block_tail_t *btp; 60230f712c9SDave Chinner 60330f712c9SDave Chinner btp = xfs_dir2_block_tail_p(tp->t_mountp->m_dir_geo, hdr); 60430f712c9SDave Chinner blp = xfs_dir2_block_leaf_p(btp); 60530f712c9SDave Chinner xfs_trans_log_buf(tp, bp, (uint)((char *)&blp[first] - (char *)hdr), 60630f712c9SDave Chinner (uint)((char *)&blp[last + 1] - (char *)hdr - 1)); 60730f712c9SDave Chinner } 60830f712c9SDave Chinner 60930f712c9SDave Chinner /* 61030f712c9SDave Chinner * Log the block tail. 61130f712c9SDave Chinner */ 61230f712c9SDave Chinner static void 61330f712c9SDave Chinner xfs_dir2_block_log_tail( 61430f712c9SDave Chinner xfs_trans_t *tp, /* transaction structure */ 61530f712c9SDave Chinner struct xfs_buf *bp) /* block buffer */ 61630f712c9SDave Chinner { 61730f712c9SDave Chinner xfs_dir2_data_hdr_t *hdr = bp->b_addr; 61830f712c9SDave Chinner xfs_dir2_block_tail_t *btp; 61930f712c9SDave Chinner 62030f712c9SDave Chinner btp = xfs_dir2_block_tail_p(tp->t_mountp->m_dir_geo, hdr); 62130f712c9SDave Chinner xfs_trans_log_buf(tp, bp, (uint)((char *)btp - (char *)hdr), 62230f712c9SDave Chinner (uint)((char *)(btp + 1) - (char *)hdr - 1)); 62330f712c9SDave Chinner } 62430f712c9SDave Chinner 62530f712c9SDave Chinner /* 62630f712c9SDave Chinner * Look up an entry in the block. This is the external routine, 62730f712c9SDave Chinner * xfs_dir2_block_lookup_int does the real work. 62830f712c9SDave Chinner */ 62930f712c9SDave Chinner int /* error */ 63030f712c9SDave Chinner xfs_dir2_block_lookup( 63130f712c9SDave Chinner xfs_da_args_t *args) /* dir lookup arguments */ 63230f712c9SDave Chinner { 63330f712c9SDave Chinner xfs_dir2_data_hdr_t *hdr; /* block header */ 63430f712c9SDave Chinner xfs_dir2_leaf_entry_t *blp; /* block leaf entries */ 63530f712c9SDave Chinner struct xfs_buf *bp; /* block buffer */ 63630f712c9SDave Chinner xfs_dir2_block_tail_t *btp; /* block tail */ 63730f712c9SDave Chinner xfs_dir2_data_entry_t *dep; /* block data entry */ 63830f712c9SDave Chinner xfs_inode_t *dp; /* incore inode */ 63930f712c9SDave Chinner int ent; /* entry index */ 64030f712c9SDave Chinner int error; /* error return value */ 64130f712c9SDave Chinner 64230f712c9SDave Chinner trace_xfs_dir2_block_lookup(args); 64330f712c9SDave Chinner 64430f712c9SDave Chinner /* 64530f712c9SDave Chinner * Get the buffer, look up the entry. 64630f712c9SDave Chinner * If not found (ENOENT) then return, have no buffer. 64730f712c9SDave Chinner */ 64830f712c9SDave Chinner if ((error = xfs_dir2_block_lookup_int(args, &bp, &ent))) 64930f712c9SDave Chinner return error; 65030f712c9SDave Chinner dp = args->dp; 65130f712c9SDave Chinner hdr = bp->b_addr; 65230f712c9SDave Chinner xfs_dir3_data_check(dp, bp); 65330f712c9SDave Chinner btp = xfs_dir2_block_tail_p(args->geo, hdr); 65430f712c9SDave Chinner blp = xfs_dir2_block_leaf_p(btp); 65530f712c9SDave Chinner /* 65630f712c9SDave Chinner * Get the offset from the leaf entry, to point to the data. 65730f712c9SDave Chinner */ 65830f712c9SDave Chinner dep = (xfs_dir2_data_entry_t *)((char *)hdr + 65930f712c9SDave Chinner xfs_dir2_dataptr_to_off(args->geo, 66030f712c9SDave Chinner be32_to_cpu(blp[ent].address))); 66130f712c9SDave Chinner /* 66230f712c9SDave Chinner * Fill in inode number, CI name if appropriate, release the block. 66330f712c9SDave Chinner */ 66430f712c9SDave Chinner args->inumber = be64_to_cpu(dep->inumber); 66559b8b465SChristoph Hellwig args->filetype = xfs_dir2_data_get_ftype(dp->i_mount, dep); 66630f712c9SDave Chinner error = xfs_dir_cilookup_result(args, dep->name, dep->namelen); 66730f712c9SDave Chinner xfs_trans_brelse(args->trans, bp); 66830f712c9SDave Chinner return error; 66930f712c9SDave Chinner } 67030f712c9SDave Chinner 67130f712c9SDave Chinner /* 67230f712c9SDave Chinner * Internal block lookup routine. 67330f712c9SDave Chinner */ 67430f712c9SDave Chinner static int /* error */ 67530f712c9SDave Chinner xfs_dir2_block_lookup_int( 67630f712c9SDave Chinner xfs_da_args_t *args, /* dir lookup arguments */ 67730f712c9SDave Chinner struct xfs_buf **bpp, /* returned block buffer */ 67830f712c9SDave Chinner int *entno) /* returned entry number */ 67930f712c9SDave Chinner { 68030f712c9SDave Chinner xfs_dir2_dataptr_t addr; /* data entry address */ 68130f712c9SDave Chinner xfs_dir2_data_hdr_t *hdr; /* block header */ 68230f712c9SDave Chinner xfs_dir2_leaf_entry_t *blp; /* block leaf entries */ 68330f712c9SDave Chinner struct xfs_buf *bp; /* block buffer */ 68430f712c9SDave Chinner xfs_dir2_block_tail_t *btp; /* block tail */ 68530f712c9SDave Chinner xfs_dir2_data_entry_t *dep; /* block data entry */ 68630f712c9SDave Chinner xfs_inode_t *dp; /* incore inode */ 68730f712c9SDave Chinner int error; /* error return value */ 68830f712c9SDave Chinner xfs_dahash_t hash; /* found hash value */ 68930f712c9SDave Chinner int high; /* binary search high index */ 69030f712c9SDave Chinner int low; /* binary search low index */ 69130f712c9SDave Chinner int mid; /* binary search current idx */ 69230f712c9SDave Chinner xfs_trans_t *tp; /* transaction pointer */ 69330f712c9SDave Chinner enum xfs_dacmp cmp; /* comparison result */ 69430f712c9SDave Chinner 69530f712c9SDave Chinner dp = args->dp; 69630f712c9SDave Chinner tp = args->trans; 69730f712c9SDave Chinner 69830f712c9SDave Chinner error = xfs_dir3_block_read(tp, dp, &bp); 69930f712c9SDave Chinner if (error) 70030f712c9SDave Chinner return error; 70130f712c9SDave Chinner 70230f712c9SDave Chinner hdr = bp->b_addr; 70330f712c9SDave Chinner xfs_dir3_data_check(dp, bp); 70430f712c9SDave Chinner btp = xfs_dir2_block_tail_p(args->geo, hdr); 70530f712c9SDave Chinner blp = xfs_dir2_block_leaf_p(btp); 70630f712c9SDave Chinner /* 70730f712c9SDave Chinner * Loop doing a binary search for our hash value. 70830f712c9SDave Chinner * Find our entry, ENOENT if it's not there. 70930f712c9SDave Chinner */ 71030f712c9SDave Chinner for (low = 0, high = be32_to_cpu(btp->count) - 1; ; ) { 71130f712c9SDave Chinner ASSERT(low <= high); 71230f712c9SDave Chinner mid = (low + high) >> 1; 71330f712c9SDave Chinner if ((hash = be32_to_cpu(blp[mid].hashval)) == args->hashval) 71430f712c9SDave Chinner break; 71530f712c9SDave Chinner if (hash < args->hashval) 71630f712c9SDave Chinner low = mid + 1; 71730f712c9SDave Chinner else 71830f712c9SDave Chinner high = mid - 1; 71930f712c9SDave Chinner if (low > high) { 72030f712c9SDave Chinner ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); 72130f712c9SDave Chinner xfs_trans_brelse(tp, bp); 7222451337dSDave Chinner return -ENOENT; 72330f712c9SDave Chinner } 72430f712c9SDave Chinner } 72530f712c9SDave Chinner /* 72630f712c9SDave Chinner * Back up to the first one with the right hash value. 72730f712c9SDave Chinner */ 72830f712c9SDave Chinner while (mid > 0 && be32_to_cpu(blp[mid - 1].hashval) == args->hashval) { 72930f712c9SDave Chinner mid--; 73030f712c9SDave Chinner } 73130f712c9SDave Chinner /* 73230f712c9SDave Chinner * Now loop forward through all the entries with the 73330f712c9SDave Chinner * right hash value looking for our name. 73430f712c9SDave Chinner */ 73530f712c9SDave Chinner do { 73630f712c9SDave Chinner if ((addr = be32_to_cpu(blp[mid].address)) == XFS_DIR2_NULL_DATAPTR) 73730f712c9SDave Chinner continue; 73830f712c9SDave Chinner /* 73930f712c9SDave Chinner * Get pointer to the entry from the leaf. 74030f712c9SDave Chinner */ 74130f712c9SDave Chinner dep = (xfs_dir2_data_entry_t *) 74230f712c9SDave Chinner ((char *)hdr + xfs_dir2_dataptr_to_off(args->geo, addr)); 74330f712c9SDave Chinner /* 74430f712c9SDave Chinner * Compare name and if it's an exact match, return the index 74530f712c9SDave Chinner * and buffer. If it's the first case-insensitive match, store 74630f712c9SDave Chinner * the index and buffer and continue looking for an exact match. 74730f712c9SDave Chinner */ 748d8d11fc7SChristoph Hellwig cmp = xfs_dir2_compname(args, dep->name, dep->namelen); 74930f712c9SDave Chinner if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) { 75030f712c9SDave Chinner args->cmpresult = cmp; 75130f712c9SDave Chinner *bpp = bp; 75230f712c9SDave Chinner *entno = mid; 75330f712c9SDave Chinner if (cmp == XFS_CMP_EXACT) 75430f712c9SDave Chinner return 0; 75530f712c9SDave Chinner } 75630f712c9SDave Chinner } while (++mid < be32_to_cpu(btp->count) && 75730f712c9SDave Chinner be32_to_cpu(blp[mid].hashval) == hash); 75830f712c9SDave Chinner 75930f712c9SDave Chinner ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); 76030f712c9SDave Chinner /* 76130f712c9SDave Chinner * Here, we can only be doing a lookup (not a rename or replace). 76230f712c9SDave Chinner * If a case-insensitive match was found earlier, return success. 76330f712c9SDave Chinner */ 76430f712c9SDave Chinner if (args->cmpresult == XFS_CMP_CASE) 76530f712c9SDave Chinner return 0; 76630f712c9SDave Chinner /* 76730f712c9SDave Chinner * No match, release the buffer and return ENOENT. 76830f712c9SDave Chinner */ 76930f712c9SDave Chinner xfs_trans_brelse(tp, bp); 7702451337dSDave Chinner return -ENOENT; 77130f712c9SDave Chinner } 77230f712c9SDave Chinner 77330f712c9SDave Chinner /* 77430f712c9SDave Chinner * Remove an entry from a block format directory. 77530f712c9SDave Chinner * If that makes the block small enough to fit in shortform, transform it. 77630f712c9SDave Chinner */ 77730f712c9SDave Chinner int /* error */ 77830f712c9SDave Chinner xfs_dir2_block_removename( 77930f712c9SDave Chinner xfs_da_args_t *args) /* directory operation args */ 78030f712c9SDave Chinner { 78130f712c9SDave Chinner xfs_dir2_data_hdr_t *hdr; /* block header */ 78230f712c9SDave Chinner xfs_dir2_leaf_entry_t *blp; /* block leaf pointer */ 78330f712c9SDave Chinner struct xfs_buf *bp; /* block buffer */ 78430f712c9SDave Chinner xfs_dir2_block_tail_t *btp; /* block tail */ 78530f712c9SDave Chinner xfs_dir2_data_entry_t *dep; /* block data entry */ 78630f712c9SDave Chinner xfs_inode_t *dp; /* incore inode */ 78730f712c9SDave Chinner int ent; /* block leaf entry index */ 78830f712c9SDave Chinner int error; /* error return value */ 78930f712c9SDave Chinner int needlog; /* need to log block header */ 79030f712c9SDave Chinner int needscan; /* need to fixup bestfree */ 79130f712c9SDave Chinner xfs_dir2_sf_hdr_t sfh; /* shortform header */ 79230f712c9SDave Chinner int size; /* shortform size */ 79330f712c9SDave Chinner xfs_trans_t *tp; /* transaction pointer */ 79430f712c9SDave Chinner 79530f712c9SDave Chinner trace_xfs_dir2_block_removename(args); 79630f712c9SDave Chinner 79730f712c9SDave Chinner /* 79830f712c9SDave Chinner * Look up the entry in the block. Gets the buffer and entry index. 79930f712c9SDave Chinner * It will always be there, the vnodeops level does a lookup first. 80030f712c9SDave Chinner */ 80130f712c9SDave Chinner if ((error = xfs_dir2_block_lookup_int(args, &bp, &ent))) { 80230f712c9SDave Chinner return error; 80330f712c9SDave Chinner } 80430f712c9SDave Chinner dp = args->dp; 80530f712c9SDave Chinner tp = args->trans; 80630f712c9SDave Chinner hdr = bp->b_addr; 80730f712c9SDave Chinner btp = xfs_dir2_block_tail_p(args->geo, hdr); 80830f712c9SDave Chinner blp = xfs_dir2_block_leaf_p(btp); 80930f712c9SDave Chinner /* 81030f712c9SDave Chinner * Point to the data entry using the leaf entry. 81130f712c9SDave Chinner */ 81230f712c9SDave Chinner dep = (xfs_dir2_data_entry_t *)((char *)hdr + 81330f712c9SDave Chinner xfs_dir2_dataptr_to_off(args->geo, 81430f712c9SDave Chinner be32_to_cpu(blp[ent].address))); 81530f712c9SDave Chinner /* 81630f712c9SDave Chinner * Mark the data entry's space free. 81730f712c9SDave Chinner */ 81830f712c9SDave Chinner needlog = needscan = 0; 81930f712c9SDave Chinner xfs_dir2_data_make_free(args, bp, 82030f712c9SDave Chinner (xfs_dir2_data_aoff_t)((char *)dep - (char *)hdr), 821fdbb8c5bSChristoph Hellwig xfs_dir2_data_entsize(dp->i_mount, dep->namelen), &needlog, 822fdbb8c5bSChristoph Hellwig &needscan); 82330f712c9SDave Chinner /* 82430f712c9SDave Chinner * Fix up the block tail. 82530f712c9SDave Chinner */ 82630f712c9SDave Chinner be32_add_cpu(&btp->stale, 1); 82730f712c9SDave Chinner xfs_dir2_block_log_tail(tp, bp); 82830f712c9SDave Chinner /* 82930f712c9SDave Chinner * Remove the leaf entry by marking it stale. 83030f712c9SDave Chinner */ 83130f712c9SDave Chinner blp[ent].address = cpu_to_be32(XFS_DIR2_NULL_DATAPTR); 83230f712c9SDave Chinner xfs_dir2_block_log_leaf(tp, bp, ent, ent); 83330f712c9SDave Chinner /* 83430f712c9SDave Chinner * Fix up bestfree, log the header if necessary. 83530f712c9SDave Chinner */ 83630f712c9SDave Chinner if (needscan) 837ae42976dSChristoph Hellwig xfs_dir2_data_freescan(dp->i_mount, hdr, &needlog); 83830f712c9SDave Chinner if (needlog) 83930f712c9SDave Chinner xfs_dir2_data_log_header(args, bp); 84030f712c9SDave Chinner xfs_dir3_data_check(dp, bp); 84130f712c9SDave Chinner /* 84230f712c9SDave Chinner * See if the size as a shortform is good enough. 84330f712c9SDave Chinner */ 84430f712c9SDave Chinner size = xfs_dir2_block_sfsize(dp, hdr, &sfh); 84530f712c9SDave Chinner if (size > XFS_IFORK_DSIZE(dp)) 84630f712c9SDave Chinner return 0; 84730f712c9SDave Chinner 84830f712c9SDave Chinner /* 84930f712c9SDave Chinner * If it works, do the conversion. 85030f712c9SDave Chinner */ 85130f712c9SDave Chinner return xfs_dir2_block_to_sf(args, bp, size, &sfh); 85230f712c9SDave Chinner } 85330f712c9SDave Chinner 85430f712c9SDave Chinner /* 85530f712c9SDave Chinner * Replace an entry in a V2 block directory. 85630f712c9SDave Chinner * Change the inode number to the new value. 85730f712c9SDave Chinner */ 85830f712c9SDave Chinner int /* error */ 85930f712c9SDave Chinner xfs_dir2_block_replace( 86030f712c9SDave Chinner xfs_da_args_t *args) /* directory operation args */ 86130f712c9SDave Chinner { 86230f712c9SDave Chinner xfs_dir2_data_hdr_t *hdr; /* block header */ 86330f712c9SDave Chinner xfs_dir2_leaf_entry_t *blp; /* block leaf entries */ 86430f712c9SDave Chinner struct xfs_buf *bp; /* block buffer */ 86530f712c9SDave Chinner xfs_dir2_block_tail_t *btp; /* block tail */ 86630f712c9SDave Chinner xfs_dir2_data_entry_t *dep; /* block data entry */ 86730f712c9SDave Chinner xfs_inode_t *dp; /* incore inode */ 86830f712c9SDave Chinner int ent; /* leaf entry index */ 86930f712c9SDave Chinner int error; /* error return value */ 87030f712c9SDave Chinner 87130f712c9SDave Chinner trace_xfs_dir2_block_replace(args); 87230f712c9SDave Chinner 87330f712c9SDave Chinner /* 87430f712c9SDave Chinner * Lookup the entry in the directory. Get buffer and entry index. 87530f712c9SDave Chinner * This will always succeed since the caller has already done a lookup. 87630f712c9SDave Chinner */ 87730f712c9SDave Chinner if ((error = xfs_dir2_block_lookup_int(args, &bp, &ent))) { 87830f712c9SDave Chinner return error; 87930f712c9SDave Chinner } 88030f712c9SDave Chinner dp = args->dp; 88130f712c9SDave Chinner hdr = bp->b_addr; 88230f712c9SDave Chinner btp = xfs_dir2_block_tail_p(args->geo, hdr); 88330f712c9SDave Chinner blp = xfs_dir2_block_leaf_p(btp); 88430f712c9SDave Chinner /* 88530f712c9SDave Chinner * Point to the data entry we need to change. 88630f712c9SDave Chinner */ 88730f712c9SDave Chinner dep = (xfs_dir2_data_entry_t *)((char *)hdr + 88830f712c9SDave Chinner xfs_dir2_dataptr_to_off(args->geo, 88930f712c9SDave Chinner be32_to_cpu(blp[ent].address))); 89030f712c9SDave Chinner ASSERT(be64_to_cpu(dep->inumber) != args->inumber); 89130f712c9SDave Chinner /* 89230f712c9SDave Chinner * Change the inode number to the new value. 89330f712c9SDave Chinner */ 89430f712c9SDave Chinner dep->inumber = cpu_to_be64(args->inumber); 89559b8b465SChristoph Hellwig xfs_dir2_data_put_ftype(dp->i_mount, dep, args->filetype); 89630f712c9SDave Chinner xfs_dir2_data_log_entry(args, bp, dep); 89730f712c9SDave Chinner xfs_dir3_data_check(dp, bp); 89830f712c9SDave Chinner return 0; 89930f712c9SDave Chinner } 90030f712c9SDave Chinner 90130f712c9SDave Chinner /* 90230f712c9SDave Chinner * Qsort comparison routine for the block leaf entries. 90330f712c9SDave Chinner */ 90430f712c9SDave Chinner static int /* sort order */ 90530f712c9SDave Chinner xfs_dir2_block_sort( 90630f712c9SDave Chinner const void *a, /* first leaf entry */ 90730f712c9SDave Chinner const void *b) /* second leaf entry */ 90830f712c9SDave Chinner { 90930f712c9SDave Chinner const xfs_dir2_leaf_entry_t *la; /* first leaf entry */ 91030f712c9SDave Chinner const xfs_dir2_leaf_entry_t *lb; /* second leaf entry */ 91130f712c9SDave Chinner 91230f712c9SDave Chinner la = a; 91330f712c9SDave Chinner lb = b; 91430f712c9SDave Chinner return be32_to_cpu(la->hashval) < be32_to_cpu(lb->hashval) ? -1 : 91530f712c9SDave Chinner (be32_to_cpu(la->hashval) > be32_to_cpu(lb->hashval) ? 1 : 0); 91630f712c9SDave Chinner } 91730f712c9SDave Chinner 91830f712c9SDave Chinner /* 91930f712c9SDave Chinner * Convert a V2 leaf directory to a V2 block directory if possible. 92030f712c9SDave Chinner */ 92130f712c9SDave Chinner int /* error */ 92230f712c9SDave Chinner xfs_dir2_leaf_to_block( 92330f712c9SDave Chinner xfs_da_args_t *args, /* operation arguments */ 92430f712c9SDave Chinner struct xfs_buf *lbp, /* leaf buffer */ 92530f712c9SDave Chinner struct xfs_buf *dbp) /* data buffer */ 92630f712c9SDave Chinner { 92730f712c9SDave Chinner __be16 *bestsp; /* leaf bests table */ 92830f712c9SDave Chinner xfs_dir2_data_hdr_t *hdr; /* block header */ 92930f712c9SDave Chinner xfs_dir2_block_tail_t *btp; /* block tail */ 93030f712c9SDave Chinner xfs_inode_t *dp; /* incore directory inode */ 93130f712c9SDave Chinner xfs_dir2_data_unused_t *dup; /* unused data entry */ 93230f712c9SDave Chinner int error; /* error return value */ 93330f712c9SDave Chinner int from; /* leaf from index */ 93430f712c9SDave Chinner xfs_dir2_leaf_t *leaf; /* leaf structure */ 93530f712c9SDave Chinner xfs_dir2_leaf_entry_t *lep; /* leaf entry */ 93630f712c9SDave Chinner xfs_dir2_leaf_tail_t *ltp; /* leaf tail structure */ 93730f712c9SDave Chinner xfs_mount_t *mp; /* file system mount point */ 93830f712c9SDave Chinner int needlog; /* need to log data header */ 93930f712c9SDave Chinner int needscan; /* need to scan for bestfree */ 94030f712c9SDave Chinner xfs_dir2_sf_hdr_t sfh; /* shortform header */ 94130f712c9SDave Chinner int size; /* bytes used */ 94230f712c9SDave Chinner __be16 *tagp; /* end of entry (tag) */ 94330f712c9SDave Chinner int to; /* block/leaf to index */ 94430f712c9SDave Chinner xfs_trans_t *tp; /* transaction pointer */ 94530f712c9SDave Chinner struct xfs_dir3_icleaf_hdr leafhdr; 94630f712c9SDave Chinner 94730f712c9SDave Chinner trace_xfs_dir2_leaf_to_block(args); 94830f712c9SDave Chinner 94930f712c9SDave Chinner dp = args->dp; 95030f712c9SDave Chinner tp = args->trans; 95130f712c9SDave Chinner mp = dp->i_mount; 95230f712c9SDave Chinner leaf = lbp->b_addr; 95351842556SChristoph Hellwig xfs_dir2_leaf_hdr_from_disk(mp, &leafhdr, leaf); 95430f712c9SDave Chinner ltp = xfs_dir2_leaf_tail_p(args->geo, leaf); 95530f712c9SDave Chinner 95630f712c9SDave Chinner ASSERT(leafhdr.magic == XFS_DIR2_LEAF1_MAGIC || 95730f712c9SDave Chinner leafhdr.magic == XFS_DIR3_LEAF1_MAGIC); 95830f712c9SDave Chinner /* 95930f712c9SDave Chinner * If there are data blocks other than the first one, take this 96030f712c9SDave Chinner * opportunity to remove trailing empty data blocks that may have 96130f712c9SDave Chinner * been left behind during no-space-reservation operations. 96230f712c9SDave Chinner * These will show up in the leaf bests table. 96330f712c9SDave Chinner */ 96413d2c10bSChristoph Hellwig while (dp->i_disk_size > args->geo->blksize) { 96530f712c9SDave Chinner int hdrsz; 96630f712c9SDave Chinner 967d73e1ceeSChristoph Hellwig hdrsz = args->geo->data_entry_offset; 96830f712c9SDave Chinner bestsp = xfs_dir2_leaf_bests_p(ltp); 96930f712c9SDave Chinner if (be16_to_cpu(bestsp[be32_to_cpu(ltp->bestcount) - 1]) == 97030f712c9SDave Chinner args->geo->blksize - hdrsz) { 97130f712c9SDave Chinner if ((error = 97230f712c9SDave Chinner xfs_dir2_leaf_trim_data(args, lbp, 97330f712c9SDave Chinner (xfs_dir2_db_t)(be32_to_cpu(ltp->bestcount) - 1)))) 97430f712c9SDave Chinner return error; 97530f712c9SDave Chinner } else 97630f712c9SDave Chinner return 0; 97730f712c9SDave Chinner } 97830f712c9SDave Chinner /* 97930f712c9SDave Chinner * Read the data block if we don't already have it, give up if it fails. 98030f712c9SDave Chinner */ 98130f712c9SDave Chinner if (!dbp) { 982cd2c9f1bSChristoph Hellwig error = xfs_dir3_data_read(tp, dp, args->geo->datablk, 0, &dbp); 98330f712c9SDave Chinner if (error) 98430f712c9SDave Chinner return error; 98530f712c9SDave Chinner } 98630f712c9SDave Chinner hdr = dbp->b_addr; 98730f712c9SDave Chinner ASSERT(hdr->magic == cpu_to_be32(XFS_DIR2_DATA_MAGIC) || 98830f712c9SDave Chinner hdr->magic == cpu_to_be32(XFS_DIR3_DATA_MAGIC)); 98930f712c9SDave Chinner 99030f712c9SDave Chinner /* 99130f712c9SDave Chinner * Size of the "leaf" area in the block. 99230f712c9SDave Chinner */ 99330f712c9SDave Chinner size = (uint)sizeof(xfs_dir2_block_tail_t) + 99430f712c9SDave Chinner (uint)sizeof(*lep) * (leafhdr.count - leafhdr.stale); 99530f712c9SDave Chinner /* 99630f712c9SDave Chinner * Look at the last data entry. 99730f712c9SDave Chinner */ 99830f712c9SDave Chinner tagp = (__be16 *)((char *)hdr + args->geo->blksize) - 1; 99930f712c9SDave Chinner dup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp)); 100030f712c9SDave Chinner /* 100130f712c9SDave Chinner * If it's not free or is too short we can't do it. 100230f712c9SDave Chinner */ 100330f712c9SDave Chinner if (be16_to_cpu(dup->freetag) != XFS_DIR2_DATA_FREE_TAG || 100430f712c9SDave Chinner be16_to_cpu(dup->length) < size) 100530f712c9SDave Chinner return 0; 100630f712c9SDave Chinner 100730f712c9SDave Chinner /* 100830f712c9SDave Chinner * Start converting it to block form. 100930f712c9SDave Chinner */ 101030f712c9SDave Chinner xfs_dir3_block_init(mp, tp, dbp, dp); 101130f712c9SDave Chinner 101230f712c9SDave Chinner needlog = 1; 101330f712c9SDave Chinner needscan = 0; 101430f712c9SDave Chinner /* 101530f712c9SDave Chinner * Use up the space at the end of the block (blp/btp). 101630f712c9SDave Chinner */ 10176915ef35SDarrick J. Wong error = xfs_dir2_data_use_free(args, dbp, dup, 10186915ef35SDarrick J. Wong args->geo->blksize - size, size, &needlog, &needscan); 10196915ef35SDarrick J. Wong if (error) 10206915ef35SDarrick J. Wong return error; 102130f712c9SDave Chinner /* 102230f712c9SDave Chinner * Initialize the block tail. 102330f712c9SDave Chinner */ 102430f712c9SDave Chinner btp = xfs_dir2_block_tail_p(args->geo, hdr); 102530f712c9SDave Chinner btp->count = cpu_to_be32(leafhdr.count - leafhdr.stale); 102630f712c9SDave Chinner btp->stale = 0; 102730f712c9SDave Chinner xfs_dir2_block_log_tail(tp, dbp); 102830f712c9SDave Chinner /* 102930f712c9SDave Chinner * Initialize the block leaf area. We compact out stale entries. 103030f712c9SDave Chinner */ 103130f712c9SDave Chinner lep = xfs_dir2_block_leaf_p(btp); 103230f712c9SDave Chinner for (from = to = 0; from < leafhdr.count; from++) { 1033787b0893SChristoph Hellwig if (leafhdr.ents[from].address == 1034787b0893SChristoph Hellwig cpu_to_be32(XFS_DIR2_NULL_DATAPTR)) 103530f712c9SDave Chinner continue; 1036787b0893SChristoph Hellwig lep[to++] = leafhdr.ents[from]; 103730f712c9SDave Chinner } 103830f712c9SDave Chinner ASSERT(to == be32_to_cpu(btp->count)); 103930f712c9SDave Chinner xfs_dir2_block_log_leaf(tp, dbp, 0, be32_to_cpu(btp->count) - 1); 104030f712c9SDave Chinner /* 104130f712c9SDave Chinner * Scan the bestfree if we need it and log the data block header. 104230f712c9SDave Chinner */ 104330f712c9SDave Chinner if (needscan) 1044ae42976dSChristoph Hellwig xfs_dir2_data_freescan(dp->i_mount, hdr, &needlog); 104530f712c9SDave Chinner if (needlog) 104630f712c9SDave Chinner xfs_dir2_data_log_header(args, dbp); 104730f712c9SDave Chinner /* 104830f712c9SDave Chinner * Pitch the old leaf block. 104930f712c9SDave Chinner */ 105030f712c9SDave Chinner error = xfs_da_shrink_inode(args, args->geo->leafblk, lbp); 105130f712c9SDave Chinner if (error) 105230f712c9SDave Chinner return error; 105330f712c9SDave Chinner 105430f712c9SDave Chinner /* 105530f712c9SDave Chinner * Now see if the resulting block can be shrunken to shortform. 105630f712c9SDave Chinner */ 105730f712c9SDave Chinner size = xfs_dir2_block_sfsize(dp, hdr, &sfh); 105830f712c9SDave Chinner if (size > XFS_IFORK_DSIZE(dp)) 105930f712c9SDave Chinner return 0; 106030f712c9SDave Chinner 106130f712c9SDave Chinner return xfs_dir2_block_to_sf(args, dbp, size, &sfh); 106230f712c9SDave Chinner } 106330f712c9SDave Chinner 106430f712c9SDave Chinner /* 106530f712c9SDave Chinner * Convert the shortform directory to block form. 106630f712c9SDave Chinner */ 106730f712c9SDave Chinner int /* error */ 106830f712c9SDave Chinner xfs_dir2_sf_to_block( 1069da3ca0dfSChristoph Hellwig struct xfs_da_args *args) 107030f712c9SDave Chinner { 1071da3ca0dfSChristoph Hellwig struct xfs_trans *tp = args->trans; 1072da3ca0dfSChristoph Hellwig struct xfs_inode *dp = args->dp; 1073da3ca0dfSChristoph Hellwig struct xfs_mount *mp = dp->i_mount; 1074da3ca0dfSChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(dp, XFS_DATA_FORK); 1075d73e1ceeSChristoph Hellwig struct xfs_da_geometry *geo = args->geo; 107630f712c9SDave Chinner xfs_dir2_db_t blkno; /* dir-relative block # (0) */ 107730f712c9SDave Chinner xfs_dir2_data_hdr_t *hdr; /* block header */ 107830f712c9SDave Chinner xfs_dir2_leaf_entry_t *blp; /* block leaf entries */ 107930f712c9SDave Chinner struct xfs_buf *bp; /* block buffer */ 108030f712c9SDave Chinner xfs_dir2_block_tail_t *btp; /* block tail pointer */ 108130f712c9SDave Chinner xfs_dir2_data_entry_t *dep; /* data entry pointer */ 108230f712c9SDave Chinner int dummy; /* trash */ 108330f712c9SDave Chinner xfs_dir2_data_unused_t *dup; /* unused entry pointer */ 108430f712c9SDave Chinner int endoffset; /* end of data objects */ 108530f712c9SDave Chinner int error; /* error return value */ 108630f712c9SDave Chinner int i; /* index */ 108730f712c9SDave Chinner int needlog; /* need to log block header */ 108830f712c9SDave Chinner int needscan; /* need to scan block freespc */ 108930f712c9SDave Chinner int newoffset; /* offset from current entry */ 1090d73e1ceeSChristoph Hellwig unsigned int offset = geo->data_entry_offset; 109130f712c9SDave Chinner xfs_dir2_sf_entry_t *sfep; /* sf entry pointer */ 109230f712c9SDave Chinner xfs_dir2_sf_hdr_t *oldsfp; /* old shortform header */ 109330f712c9SDave Chinner xfs_dir2_sf_hdr_t *sfp; /* shortform header */ 109430f712c9SDave Chinner __be16 *tagp; /* end of data entry */ 109530f712c9SDave Chinner struct xfs_name name; 109630f712c9SDave Chinner 109730f712c9SDave Chinner trace_xfs_dir2_sf_to_block(args); 109830f712c9SDave Chinner 10990779f4a6SChristoph Hellwig ASSERT(ifp->if_format == XFS_DINODE_FMT_LOCAL); 110013d2c10bSChristoph Hellwig ASSERT(dp->i_disk_size >= offsetof(struct xfs_dir2_sf_hdr, parent)); 110130f712c9SDave Chinner 110230f712c9SDave Chinner oldsfp = (xfs_dir2_sf_hdr_t *)ifp->if_u1.if_data; 110330f712c9SDave Chinner 110413d2c10bSChristoph Hellwig ASSERT(ifp->if_bytes == dp->i_disk_size); 110530f712c9SDave Chinner ASSERT(ifp->if_u1.if_data != NULL); 110613d2c10bSChristoph Hellwig ASSERT(dp->i_disk_size >= xfs_dir2_sf_hdr_size(oldsfp->i8count)); 1107daf83964SChristoph Hellwig ASSERT(dp->i_df.if_nextents == 0); 110830f712c9SDave Chinner 110930f712c9SDave Chinner /* 111030f712c9SDave Chinner * Copy the directory into a temporary buffer. 111130f712c9SDave Chinner * Then pitch the incore inode data so we can make extents. 111230f712c9SDave Chinner */ 1113707e0ddaSTetsuo Handa sfp = kmem_alloc(ifp->if_bytes, 0); 111430f712c9SDave Chinner memcpy(sfp, oldsfp, ifp->if_bytes); 111530f712c9SDave Chinner 111630f712c9SDave Chinner xfs_idata_realloc(dp, -ifp->if_bytes, XFS_DATA_FORK); 1117aeea4b75SBrian Foster xfs_bmap_local_to_extents_empty(tp, dp, XFS_DATA_FORK); 111813d2c10bSChristoph Hellwig dp->i_disk_size = 0; 111930f712c9SDave Chinner 112030f712c9SDave Chinner /* 112130f712c9SDave Chinner * Add block 0 to the inode. 112230f712c9SDave Chinner */ 112330f712c9SDave Chinner error = xfs_dir2_grow_inode(args, XFS_DIR2_DATA_SPACE, &blkno); 11246915ef35SDarrick J. Wong if (error) 11256915ef35SDarrick J. Wong goto out_free; 112630f712c9SDave Chinner /* 112730f712c9SDave Chinner * Initialize the data block, then convert it to block format. 112830f712c9SDave Chinner */ 112930f712c9SDave Chinner error = xfs_dir3_data_init(args, blkno, &bp); 11306915ef35SDarrick J. Wong if (error) 11316915ef35SDarrick J. Wong goto out_free; 113230f712c9SDave Chinner xfs_dir3_block_init(mp, tp, bp, dp); 113330f712c9SDave Chinner hdr = bp->b_addr; 113430f712c9SDave Chinner 113530f712c9SDave Chinner /* 113630f712c9SDave Chinner * Compute size of block "tail" area. 113730f712c9SDave Chinner */ 113830f712c9SDave Chinner i = (uint)sizeof(*btp) + 113930f712c9SDave Chinner (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t); 114030f712c9SDave Chinner /* 114130f712c9SDave Chinner * The whole thing is initialized to free by the init routine. 114230f712c9SDave Chinner * Say we're using the leaf and tail area. 114330f712c9SDave Chinner */ 1144ee641d5aSChristoph Hellwig dup = bp->b_addr + offset; 114530f712c9SDave Chinner needlog = needscan = 0; 11466915ef35SDarrick J. Wong error = xfs_dir2_data_use_free(args, bp, dup, args->geo->blksize - i, 114730f712c9SDave Chinner i, &needlog, &needscan); 11486915ef35SDarrick J. Wong if (error) 11496915ef35SDarrick J. Wong goto out_free; 115030f712c9SDave Chinner ASSERT(needscan == 0); 115130f712c9SDave Chinner /* 115230f712c9SDave Chinner * Fill in the tail. 115330f712c9SDave Chinner */ 115430f712c9SDave Chinner btp = xfs_dir2_block_tail_p(args->geo, hdr); 115530f712c9SDave Chinner btp->count = cpu_to_be32(sfp->count + 2); /* ., .. */ 115630f712c9SDave Chinner btp->stale = 0; 115730f712c9SDave Chinner blp = xfs_dir2_block_leaf_p(btp); 115830f712c9SDave Chinner endoffset = (uint)((char *)blp - (char *)hdr); 115930f712c9SDave Chinner /* 116030f712c9SDave Chinner * Remove the freespace, we'll manage it. 116130f712c9SDave Chinner */ 11626915ef35SDarrick J. Wong error = xfs_dir2_data_use_free(args, bp, dup, 116330f712c9SDave Chinner (xfs_dir2_data_aoff_t)((char *)dup - (char *)hdr), 116430f712c9SDave Chinner be16_to_cpu(dup->length), &needlog, &needscan); 11656915ef35SDarrick J. Wong if (error) 11666915ef35SDarrick J. Wong goto out_free; 1167da3ca0dfSChristoph Hellwig 116830f712c9SDave Chinner /* 116930f712c9SDave Chinner * Create entry for . 117030f712c9SDave Chinner */ 1171da3ca0dfSChristoph Hellwig dep = bp->b_addr + offset; 117230f712c9SDave Chinner dep->inumber = cpu_to_be64(dp->i_ino); 117330f712c9SDave Chinner dep->namelen = 1; 117430f712c9SDave Chinner dep->name[0] = '.'; 117559b8b465SChristoph Hellwig xfs_dir2_data_put_ftype(mp, dep, XFS_DIR3_FT_DIR); 11767e8ae7bdSChristoph Hellwig tagp = xfs_dir2_data_entry_tag_p(mp, dep); 1177da3ca0dfSChristoph Hellwig *tagp = cpu_to_be16(offset); 117830f712c9SDave Chinner xfs_dir2_data_log_entry(args, bp, dep); 117930f712c9SDave Chinner blp[0].hashval = cpu_to_be32(xfs_dir_hash_dot); 1180da3ca0dfSChristoph Hellwig blp[0].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(offset)); 1181fdbb8c5bSChristoph Hellwig offset += xfs_dir2_data_entsize(mp, dep->namelen); 1182da3ca0dfSChristoph Hellwig 118330f712c9SDave Chinner /* 118430f712c9SDave Chinner * Create entry for .. 118530f712c9SDave Chinner */ 1186da3ca0dfSChristoph Hellwig dep = bp->b_addr + offset; 118784915e1bSChristoph Hellwig dep->inumber = cpu_to_be64(xfs_dir2_sf_get_parent_ino(sfp)); 118830f712c9SDave Chinner dep->namelen = 2; 118930f712c9SDave Chinner dep->name[0] = dep->name[1] = '.'; 119059b8b465SChristoph Hellwig xfs_dir2_data_put_ftype(mp, dep, XFS_DIR3_FT_DIR); 11917e8ae7bdSChristoph Hellwig tagp = xfs_dir2_data_entry_tag_p(mp, dep); 1192da3ca0dfSChristoph Hellwig *tagp = cpu_to_be16(offset); 119330f712c9SDave Chinner xfs_dir2_data_log_entry(args, bp, dep); 119430f712c9SDave Chinner blp[1].hashval = cpu_to_be32(xfs_dir_hash_dotdot); 1195da3ca0dfSChristoph Hellwig blp[1].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(offset)); 1196fdbb8c5bSChristoph Hellwig offset += xfs_dir2_data_entsize(mp, dep->namelen); 1197da3ca0dfSChristoph Hellwig 119830f712c9SDave Chinner /* 119930f712c9SDave Chinner * Loop over existing entries, stuff them in. 120030f712c9SDave Chinner */ 120130f712c9SDave Chinner i = 0; 120230f712c9SDave Chinner if (!sfp->count) 120330f712c9SDave Chinner sfep = NULL; 120430f712c9SDave Chinner else 120530f712c9SDave Chinner sfep = xfs_dir2_sf_firstentry(sfp); 1206da3ca0dfSChristoph Hellwig 120730f712c9SDave Chinner /* 120830f712c9SDave Chinner * Need to preserve the existing offset values in the sf directory. 120930f712c9SDave Chinner * Insert holes (unused entries) where necessary. 121030f712c9SDave Chinner */ 121130f712c9SDave Chinner while (offset < endoffset) { 121230f712c9SDave Chinner /* 121330f712c9SDave Chinner * sfep is null when we reach the end of the list. 121430f712c9SDave Chinner */ 121530f712c9SDave Chinner if (sfep == NULL) 121630f712c9SDave Chinner newoffset = endoffset; 121730f712c9SDave Chinner else 121830f712c9SDave Chinner newoffset = xfs_dir2_sf_get_offset(sfep); 121930f712c9SDave Chinner /* 122030f712c9SDave Chinner * There should be a hole here, make one. 122130f712c9SDave Chinner */ 122230f712c9SDave Chinner if (offset < newoffset) { 1223da3ca0dfSChristoph Hellwig dup = bp->b_addr + offset; 122430f712c9SDave Chinner dup->freetag = cpu_to_be16(XFS_DIR2_DATA_FREE_TAG); 122530f712c9SDave Chinner dup->length = cpu_to_be16(newoffset - offset); 1226da3ca0dfSChristoph Hellwig *xfs_dir2_data_unused_tag_p(dup) = cpu_to_be16(offset); 122730f712c9SDave Chinner xfs_dir2_data_log_unused(args, bp, dup); 122830f712c9SDave Chinner xfs_dir2_data_freeinsert(hdr, 12291848b607SChristoph Hellwig xfs_dir2_data_bestfree_p(mp, hdr), 123030f712c9SDave Chinner dup, &dummy); 123130f712c9SDave Chinner offset += be16_to_cpu(dup->length); 123230f712c9SDave Chinner continue; 123330f712c9SDave Chinner } 123430f712c9SDave Chinner /* 123530f712c9SDave Chinner * Copy a real entry. 123630f712c9SDave Chinner */ 1237da3ca0dfSChristoph Hellwig dep = bp->b_addr + newoffset; 123893b1e96aSChristoph Hellwig dep->inumber = cpu_to_be64(xfs_dir2_sf_get_ino(mp, sfp, sfep)); 123930f712c9SDave Chinner dep->namelen = sfep->namelen; 124059b8b465SChristoph Hellwig xfs_dir2_data_put_ftype(mp, dep, 124159b8b465SChristoph Hellwig xfs_dir2_sf_get_ftype(mp, sfep)); 124230f712c9SDave Chinner memcpy(dep->name, sfep->name, dep->namelen); 12437e8ae7bdSChristoph Hellwig tagp = xfs_dir2_data_entry_tag_p(mp, dep); 1244da3ca0dfSChristoph Hellwig *tagp = cpu_to_be16(newoffset); 124530f712c9SDave Chinner xfs_dir2_data_log_entry(args, bp, dep); 124630f712c9SDave Chinner name.name = sfep->name; 124730f712c9SDave Chinner name.len = sfep->namelen; 1248d8d11fc7SChristoph Hellwig blp[2 + i].hashval = cpu_to_be32(xfs_dir2_hashname(mp, &name)); 1249da3ca0dfSChristoph Hellwig blp[2 + i].address = 1250da3ca0dfSChristoph Hellwig cpu_to_be32(xfs_dir2_byte_to_dataptr(newoffset)); 125130f712c9SDave Chinner offset = (int)((char *)(tagp + 1) - (char *)hdr); 125230f712c9SDave Chinner if (++i == sfp->count) 125330f712c9SDave Chinner sfep = NULL; 125430f712c9SDave Chinner else 125550f6bb6bSChristoph Hellwig sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep); 125630f712c9SDave Chinner } 125730f712c9SDave Chinner /* Done with the temporary buffer */ 125830f712c9SDave Chinner kmem_free(sfp); 125930f712c9SDave Chinner /* 126030f712c9SDave Chinner * Sort the leaf entries by hash value. 126130f712c9SDave Chinner */ 126230f712c9SDave Chinner xfs_sort(blp, be32_to_cpu(btp->count), sizeof(*blp), xfs_dir2_block_sort); 126330f712c9SDave Chinner /* 126430f712c9SDave Chinner * Log the leaf entry area and tail. 126530f712c9SDave Chinner * Already logged the header in data_init, ignore needlog. 126630f712c9SDave Chinner */ 126730f712c9SDave Chinner ASSERT(needscan == 0); 126830f712c9SDave Chinner xfs_dir2_block_log_leaf(tp, bp, 0, be32_to_cpu(btp->count) - 1); 126930f712c9SDave Chinner xfs_dir2_block_log_tail(tp, bp); 127030f712c9SDave Chinner xfs_dir3_data_check(dp, bp); 127130f712c9SDave Chinner return 0; 12726915ef35SDarrick J. Wong out_free: 12736915ef35SDarrick J. Wong kmem_free(sfp); 12746915ef35SDarrick J. Wong return error; 127530f712c9SDave Chinner } 1276