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
xfs_dir_startup(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
xfs_dir3_block_verify(struct xfs_buf * bp)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
56ebd9027dSDave Chinner if (xfs_has_crc(mp)) {
57ce748eaaSEric Sandeen if (!uuid_equal(&hdr3->uuid, &mp->m_sb.sb_meta_uuid))
58a6a781a5SDarrick J. Wong return __this_address;
599343ee76SDave Chinner if (be64_to_cpu(hdr3->blkno) != xfs_buf_daddr(bp))
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
xfs_dir3_block_read_verify(struct xfs_buf * bp)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
7438c26bfdSDave 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
xfs_dir3_block_write_verify(struct xfs_buf * bp)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
9938c26bfdSDave 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
xfs_dir3_block_header_check(struct xfs_inode * dp,struct xfs_buf * bp)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
124ebd9027dSDave Chinner if (xfs_has_crc(mp)) {
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
xfs_dir3_block_read(struct xfs_trans * tp,struct xfs_inode * dp,struct xfs_buf ** bpp)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
xfs_dir3_block_init(struct xfs_mount * mp,struct xfs_trans * tp,struct xfs_buf * bp,struct xfs_inode * dp)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
17438c26bfdSDave Chinner if (xfs_has_crc(mp)) {
17530f712c9SDave Chinner memset(hdr3, 0, sizeof(*hdr3));
17630f712c9SDave Chinner hdr3->magic = cpu_to_be32(XFS_DIR3_BLOCK_MAGIC);
1779343ee76SDave Chinner hdr3->blkno = cpu_to_be64(xfs_buf_daddr(bp));
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
xfs_dir2_block_need_space(struct xfs_inode * dp,struct xfs_dir2_data_hdr * hdr,struct xfs_dir2_block_tail * btp,struct xfs_dir2_leaf_entry * blp,__be16 ** tagpp,struct xfs_dir2_data_unused ** dupp,struct xfs_dir2_data_unused ** enddupp,int * compact,int len)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
xfs_dir2_block_compact(struct xfs_da_args * args,struct xfs_buf * bp,struct xfs_dir2_data_hdr * hdr,struct xfs_dir2_block_tail * btp,struct xfs_dir2_leaf_entry * blp,int * needlog,int * lfloghigh,int * lfloglow)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 */
xfs_dir2_block_addname(xfs_da_args_t * args)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
xfs_dir2_block_log_leaf(xfs_trans_t * tp,struct xfs_buf * bp,int first,int last)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
xfs_dir2_block_log_tail(xfs_trans_t * tp,struct xfs_buf * bp)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 */
xfs_dir2_block_lookup(xfs_da_args_t * args)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 */
xfs_dir2_block_lookup_int(xfs_da_args_t * args,struct xfs_buf ** bpp,int * entno)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 */
xfs_dir2_block_removename(xfs_da_args_t * args)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);
845*c01147d9SDarrick J. Wong if (size > xfs_inode_data_fork_size(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 */
xfs_dir2_block_replace(xfs_da_args_t * args)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 */
xfs_dir2_block_sort(const void * a,const void * b)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 */
xfs_dir2_leaf_to_block(xfs_da_args_t * args,struct xfs_buf * lbp,struct xfs_buf * dbp)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);
1058*c01147d9SDarrick J. Wong if (size > xfs_inode_data_fork_size(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 */
xfs_dir2_sf_to_block(struct xfs_da_args * args)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;
1074732436efSDarrick J. Wong 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