^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/bio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include "exfat_raw.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "exfat_fs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) static int exfat_extract_uni_name(struct exfat_dentry *ep,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) unsigned short *uniname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) int i, len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) for (i = 0; i < EXFAT_FILE_NAME_LEN; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) *uniname = le16_to_cpu(ep->dentry.name.unicode_0_14[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) if (*uniname == 0x0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) uniname++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) len++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) *uniname = 0x0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) return len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static void exfat_get_uniname_from_ext_entry(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct exfat_chain *p_dir, int entry, unsigned short *uniname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct exfat_entry_set_cache *es;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) es = exfat_get_dentry_set(sb, p_dir, entry, ES_ALL_ENTRIES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) if (!es)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * First entry : file entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * Second entry : stream-extension entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * Third entry : first file-name entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * So, the index of first file-name dentry should start from 2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) for (i = 2; i < es->num_entries; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct exfat_dentry *ep = exfat_get_dentry_cached(es, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) /* end of name entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) if (exfat_get_entry_type(ep) != TYPE_EXTEND)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) exfat_extract_uni_name(ep, uniname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) uniname += EXFAT_FILE_NAME_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) exfat_free_dentry_set(es, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) /* read a directory entry from the opened directory */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static int exfat_readdir(struct inode *inode, loff_t *cpos, struct exfat_dir_entry *dir_entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) int i, dentries_per_clu, dentries_per_clu_bits = 0, num_ext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) unsigned int type, clu_offset, max_dentries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) sector_t sector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct exfat_chain dir, clu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) struct exfat_uni_name uni_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) struct exfat_dentry *ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) struct super_block *sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) struct exfat_sb_info *sbi = EXFAT_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) struct exfat_inode_info *ei = EXFAT_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) unsigned int dentry = EXFAT_B_TO_DEN(*cpos) & 0xFFFFFFFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) /* check if the given file ID is opened */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (ei->type != TYPE_DIR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (ei->entry == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) exfat_chain_set(&dir, sbi->root_dir, 0, ALLOC_FAT_CHAIN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) exfat_chain_set(&dir, ei->start_clu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) EXFAT_B_TO_CLU(i_size_read(inode), sbi), ei->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) dentries_per_clu = sbi->dentries_per_clu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) dentries_per_clu_bits = ilog2(dentries_per_clu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) max_dentries = (unsigned int)min_t(u64, MAX_EXFAT_DENTRIES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) (u64)sbi->num_clusters << dentries_per_clu_bits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) clu_offset = dentry >> dentries_per_clu_bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) exfat_chain_dup(&clu, &dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (clu.flags == ALLOC_NO_FAT_CHAIN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) clu.dir += clu_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) clu.size -= clu_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) /* hint_information */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) if (clu_offset > 0 && ei->hint_bmap.off != EXFAT_EOF_CLUSTER &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) ei->hint_bmap.off > 0 && clu_offset >= ei->hint_bmap.off) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) clu_offset -= ei->hint_bmap.off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) clu.dir = ei->hint_bmap.clu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) while (clu_offset > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) if (exfat_get_next_cluster(sb, &(clu.dir)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) clu_offset--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) while (clu.dir != EXFAT_EOF_CLUSTER && dentry < max_dentries) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) i = dentry & (dentries_per_clu - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) for ( ; i < dentries_per_clu; i++, dentry++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) ep = exfat_get_dentry(sb, &clu, i, &bh, §or);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (!ep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) type = exfat_get_entry_type(ep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (type == TYPE_UNUSED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) if (type != TYPE_FILE && type != TYPE_DIR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) num_ext = ep->dentry.file.num_ext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) dir_entry->attr = le16_to_cpu(ep->dentry.file.attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) exfat_get_entry_time(sbi, &dir_entry->crtime,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) ep->dentry.file.create_tz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) ep->dentry.file.create_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) ep->dentry.file.create_date,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) ep->dentry.file.create_time_cs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) exfat_get_entry_time(sbi, &dir_entry->mtime,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) ep->dentry.file.modify_tz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) ep->dentry.file.modify_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) ep->dentry.file.modify_date,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) ep->dentry.file.modify_time_cs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) exfat_get_entry_time(sbi, &dir_entry->atime,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) ep->dentry.file.access_tz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) ep->dentry.file.access_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) ep->dentry.file.access_date,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) *uni_name.name = 0x0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) exfat_get_uniname_from_ext_entry(sb, &dir, dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) uni_name.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) exfat_utf16_to_nls(sb, &uni_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) dir_entry->namebuf.lfn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) dir_entry->namebuf.lfnbuf_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) ep = exfat_get_dentry(sb, &clu, i + 1, &bh, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) if (!ep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) dir_entry->size =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) le64_to_cpu(ep->dentry.stream.valid_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) dir_entry->entry = dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) ei->hint_bmap.off = dentry >> dentries_per_clu_bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) ei->hint_bmap.clu = clu.dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) *cpos = EXFAT_DEN_TO_B(dentry + 1 + num_ext);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) if (clu.flags == ALLOC_NO_FAT_CHAIN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) if (--clu.size > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) clu.dir++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) clu.dir = EXFAT_EOF_CLUSTER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) if (exfat_get_next_cluster(sb, &(clu.dir)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) dir_entry->namebuf.lfn[0] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) *cpos = EXFAT_DEN_TO_B(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) static void exfat_init_namebuf(struct exfat_dentry_namebuf *nb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) nb->lfn = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) nb->lfnbuf_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) static int exfat_alloc_namebuf(struct exfat_dentry_namebuf *nb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) nb->lfn = __getname();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) if (!nb->lfn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) nb->lfnbuf_len = MAX_VFSNAME_BUF_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) static void exfat_free_namebuf(struct exfat_dentry_namebuf *nb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) if (!nb->lfn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) __putname(nb->lfn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) exfat_init_namebuf(nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) /* skip iterating emit_dots when dir is empty */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) #define ITER_POS_FILLED_DOTS (2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) static int exfat_iterate(struct file *filp, struct dir_context *ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) struct inode *inode = filp->f_path.dentry->d_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) struct super_block *sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) struct inode *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) struct exfat_dir_entry de;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) struct exfat_dentry_namebuf *nb = &(de.namebuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) struct exfat_inode_info *ei = EXFAT_I(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) unsigned long inum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) loff_t cpos, i_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) int err = 0, fake_offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) exfat_init_namebuf(nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) mutex_lock(&EXFAT_SB(sb)->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) cpos = ctx->pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) if (!dir_emit_dots(filp, ctx))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) if (ctx->pos == ITER_POS_FILLED_DOTS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) cpos = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) fake_offset = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if (cpos & (DENTRY_SIZE - 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) err = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) /* name buffer should be allocated before use */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) err = exfat_alloc_namebuf(nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) get_new:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) if (ei->flags == ALLOC_NO_FAT_CHAIN && cpos >= i_size_read(inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) goto end_of_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) err = exfat_readdir(inode, &cpos, &de);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) * At least we tried to read a sector. Move cpos to next sector
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) * position (should be aligned).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) if (err == -EIO) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) cpos += 1 << (sb->s_blocksize_bits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) cpos &= ~(sb->s_blocksize - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) goto end_of_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) if (!nb->lfn[0])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) goto end_of_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) i_pos = ((loff_t)ei->start_clu << 32) | (de.entry & 0xffffffff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) tmp = exfat_iget(sb, i_pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) if (tmp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) inum = tmp->i_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) iput(tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) inum = iunique(sb, EXFAT_ROOT_INO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) * Before calling dir_emit(), sb_lock should be released.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) * Because page fault can occur in dir_emit() when the size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) * of buffer given from user is larger than one page size.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) mutex_unlock(&EXFAT_SB(sb)->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) if (!dir_emit(ctx, nb->lfn, strlen(nb->lfn), inum,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) (de.attr & ATTR_SUBDIR) ? DT_DIR : DT_REG))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) goto out_unlocked;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) mutex_lock(&EXFAT_SB(sb)->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) ctx->pos = cpos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) goto get_new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) end_of_dir:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) if (!cpos && fake_offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) cpos = ITER_POS_FILLED_DOTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) ctx->pos = cpos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) mutex_unlock(&EXFAT_SB(sb)->s_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) out_unlocked:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) * To improve performance, free namebuf after unlock sb_lock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) * If namebuf is not allocated, this function do nothing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) exfat_free_namebuf(nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) const struct file_operations exfat_dir_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) .llseek = generic_file_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) .read = generic_read_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) .iterate = exfat_iterate,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) .fsync = exfat_file_fsync,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) int exfat_alloc_new_dir(struct inode *inode, struct exfat_chain *clu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) exfat_chain_set(clu, EXFAT_EOF_CLUSTER, 0, ALLOC_NO_FAT_CHAIN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) ret = exfat_alloc_cluster(inode, 1, clu, IS_DIRSYNC(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) return exfat_zeroed_cluster(inode, clu->dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) int exfat_calc_num_entries(struct exfat_uni_name *p_uniname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) len = p_uniname->name_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) if (len == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) /* 1 file entry + 1 stream entry + name entries */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) return ((len - 1) / EXFAT_FILE_NAME_LEN + 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) unsigned int exfat_get_entry_type(struct exfat_dentry *ep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (ep->type == EXFAT_UNUSED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) return TYPE_UNUSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) if (IS_EXFAT_DELETED(ep->type))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) return TYPE_DELETED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) if (ep->type == EXFAT_INVAL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) return TYPE_INVALID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) if (IS_EXFAT_CRITICAL_PRI(ep->type)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) if (ep->type == EXFAT_BITMAP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) return TYPE_BITMAP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) if (ep->type == EXFAT_UPCASE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) return TYPE_UPCASE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) if (ep->type == EXFAT_VOLUME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) return TYPE_VOLUME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) if (ep->type == EXFAT_FILE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) if (le16_to_cpu(ep->dentry.file.attr) & ATTR_SUBDIR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) return TYPE_DIR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) return TYPE_FILE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) return TYPE_CRITICAL_PRI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) if (IS_EXFAT_BENIGN_PRI(ep->type)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) if (ep->type == EXFAT_GUID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) return TYPE_GUID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) if (ep->type == EXFAT_PADDING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) return TYPE_PADDING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) if (ep->type == EXFAT_ACLTAB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) return TYPE_ACLTAB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) return TYPE_BENIGN_PRI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) if (IS_EXFAT_CRITICAL_SEC(ep->type)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) if (ep->type == EXFAT_STREAM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) return TYPE_STREAM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) if (ep->type == EXFAT_NAME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) return TYPE_EXTEND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) if (ep->type == EXFAT_ACL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) return TYPE_ACL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) return TYPE_CRITICAL_SEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) return TYPE_BENIGN_SEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) static void exfat_set_entry_type(struct exfat_dentry *ep, unsigned int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) if (type == TYPE_UNUSED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) ep->type = EXFAT_UNUSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) } else if (type == TYPE_DELETED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) ep->type &= EXFAT_DELETE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) } else if (type == TYPE_STREAM) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) ep->type = EXFAT_STREAM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) } else if (type == TYPE_EXTEND) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) ep->type = EXFAT_NAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) } else if (type == TYPE_BITMAP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) ep->type = EXFAT_BITMAP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) } else if (type == TYPE_UPCASE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) ep->type = EXFAT_UPCASE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) } else if (type == TYPE_VOLUME) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) ep->type = EXFAT_VOLUME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) } else if (type == TYPE_DIR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) ep->type = EXFAT_FILE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) ep->dentry.file.attr = cpu_to_le16(ATTR_SUBDIR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) } else if (type == TYPE_FILE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) ep->type = EXFAT_FILE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) ep->dentry.file.attr = cpu_to_le16(ATTR_ARCHIVE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) static void exfat_init_stream_entry(struct exfat_dentry *ep,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) unsigned char flags, unsigned int start_clu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) unsigned long long size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) exfat_set_entry_type(ep, TYPE_STREAM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) ep->dentry.stream.flags = flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) ep->dentry.stream.start_clu = cpu_to_le32(start_clu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) ep->dentry.stream.valid_size = cpu_to_le64(size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) ep->dentry.stream.size = cpu_to_le64(size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) static void exfat_init_name_entry(struct exfat_dentry *ep,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) unsigned short *uniname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) exfat_set_entry_type(ep, TYPE_EXTEND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) ep->dentry.name.flags = 0x0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) for (i = 0; i < EXFAT_FILE_NAME_LEN; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) if (*uniname != 0x0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) ep->dentry.name.unicode_0_14[i] = cpu_to_le16(*uniname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) uniname++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) ep->dentry.name.unicode_0_14[i] = 0x0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) int exfat_init_dir_entry(struct inode *inode, struct exfat_chain *p_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) int entry, unsigned int type, unsigned int start_clu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) unsigned long long size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) struct super_block *sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) struct exfat_sb_info *sbi = EXFAT_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) struct timespec64 ts = current_time(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) sector_t sector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) struct exfat_dentry *ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) * We cannot use exfat_get_dentry_set here because file ep is not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) * initialized yet.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) ep = exfat_get_dentry(sb, p_dir, entry, &bh, §or);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) if (!ep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) exfat_set_entry_type(ep, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) exfat_set_entry_time(sbi, &ts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) &ep->dentry.file.create_tz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) &ep->dentry.file.create_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) &ep->dentry.file.create_date,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) &ep->dentry.file.create_time_cs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) exfat_set_entry_time(sbi, &ts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) &ep->dentry.file.modify_tz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) &ep->dentry.file.modify_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) &ep->dentry.file.modify_date,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) &ep->dentry.file.modify_time_cs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) exfat_set_entry_time(sbi, &ts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) &ep->dentry.file.access_tz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) &ep->dentry.file.access_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) &ep->dentry.file.access_date,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) exfat_update_bh(bh, IS_DIRSYNC(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) ep = exfat_get_dentry(sb, p_dir, entry + 1, &bh, §or);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) if (!ep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) exfat_init_stream_entry(ep,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) (type == TYPE_FILE) ? ALLOC_FAT_CHAIN : ALLOC_NO_FAT_CHAIN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) start_clu, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) exfat_update_bh(bh, IS_DIRSYNC(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) int exfat_update_dir_chksum(struct inode *inode, struct exfat_chain *p_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) int entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) struct super_block *sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) int i, num_entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) sector_t sector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) u16 chksum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) struct exfat_dentry *ep, *fep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) struct buffer_head *fbh, *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) fep = exfat_get_dentry(sb, p_dir, entry, &fbh, §or);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) if (!fep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) num_entries = fep->dentry.file.num_ext + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) chksum = exfat_calc_chksum16(fep, DENTRY_SIZE, 0, CS_DIR_ENTRY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) for (i = 1; i < num_entries; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) ep = exfat_get_dentry(sb, p_dir, entry + i, &bh, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) if (!ep) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) goto release_fbh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) chksum = exfat_calc_chksum16(ep, DENTRY_SIZE, chksum,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) CS_DEFAULT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) fep->dentry.file.checksum = cpu_to_le16(chksum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) exfat_update_bh(fbh, IS_DIRSYNC(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) release_fbh:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) brelse(fbh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) int exfat_init_ext_entry(struct inode *inode, struct exfat_chain *p_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) int entry, int num_entries, struct exfat_uni_name *p_uniname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) struct super_block *sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) sector_t sector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) unsigned short *uniname = p_uniname->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) struct exfat_dentry *ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) int sync = IS_DIRSYNC(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) ep = exfat_get_dentry(sb, p_dir, entry, &bh, §or);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) if (!ep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) ep->dentry.file.num_ext = (unsigned char)(num_entries - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) exfat_update_bh(bh, sync);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) ep = exfat_get_dentry(sb, p_dir, entry + 1, &bh, §or);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) if (!ep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) ep->dentry.stream.name_len = p_uniname->name_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) ep->dentry.stream.name_hash = cpu_to_le16(p_uniname->name_hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) exfat_update_bh(bh, sync);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) for (i = EXFAT_FIRST_CLUSTER; i < num_entries; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) ep = exfat_get_dentry(sb, p_dir, entry + i, &bh, §or);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) if (!ep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) exfat_init_name_entry(ep, uniname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) exfat_update_bh(bh, sync);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) uniname += EXFAT_FILE_NAME_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) exfat_update_dir_chksum(inode, p_dir, entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) int exfat_remove_entries(struct inode *inode, struct exfat_chain *p_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) int entry, int order, int num_entries)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) struct super_block *sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) sector_t sector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) struct exfat_dentry *ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) for (i = order; i < num_entries; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) ep = exfat_get_dentry(sb, p_dir, entry + i, &bh, §or);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) if (!ep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) exfat_set_entry_type(ep, TYPE_DELETED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) exfat_update_bh(bh, IS_DIRSYNC(inode));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) void exfat_update_dir_chksum_with_entry_set(struct exfat_entry_set_cache *es)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) int chksum_type = CS_DIR_ENTRY, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) unsigned short chksum = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) struct exfat_dentry *ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) for (i = 0; i < es->num_entries; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) ep = exfat_get_dentry_cached(es, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) chksum = exfat_calc_chksum16(ep, DENTRY_SIZE, chksum,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) chksum_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) chksum_type = CS_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) ep = exfat_get_dentry_cached(es, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) ep->dentry.file.checksum = cpu_to_le16(chksum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) es->modified = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) int exfat_free_dentry_set(struct exfat_entry_set_cache *es, int sync)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) int i, err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) if (es->modified)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) err = exfat_update_bhs(es->bh, es->num_bh, sync);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) for (i = 0; i < es->num_bh; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) bforget(es->bh[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) brelse(es->bh[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) kfree(es);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) static int exfat_walk_fat_chain(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) struct exfat_chain *p_dir, unsigned int byte_offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) unsigned int *clu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) struct exfat_sb_info *sbi = EXFAT_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) unsigned int clu_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) unsigned int cur_clu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) clu_offset = EXFAT_B_TO_CLU(byte_offset, sbi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) cur_clu = p_dir->dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) if (p_dir->flags == ALLOC_NO_FAT_CHAIN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) cur_clu += clu_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) while (clu_offset > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) if (exfat_get_next_cluster(sb, &cur_clu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) if (cur_clu == EXFAT_EOF_CLUSTER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) exfat_fs_error(sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) "invalid dentry access beyond EOF (clu : %u, eidx : %d)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) p_dir->dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) EXFAT_B_TO_DEN(byte_offset));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) clu_offset--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) *clu = cur_clu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) int exfat_find_location(struct super_block *sb, struct exfat_chain *p_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) int entry, sector_t *sector, int *offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) unsigned int off, clu = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) struct exfat_sb_info *sbi = EXFAT_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) off = EXFAT_DEN_TO_B(entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) ret = exfat_walk_fat_chain(sb, p_dir, off, &clu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) /* byte offset in cluster */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) off = EXFAT_CLU_OFFSET(off, sbi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) /* byte offset in sector */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) *offset = EXFAT_BLK_OFFSET(off, sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) /* sector offset in cluster */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) *sector = EXFAT_B_TO_BLK(off, sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) *sector += exfat_cluster_to_sector(sbi, clu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) #define EXFAT_MAX_RA_SIZE (128*1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) static int exfat_dir_readahead(struct super_block *sb, sector_t sec)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) struct exfat_sb_info *sbi = EXFAT_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) unsigned int max_ra_count = EXFAT_MAX_RA_SIZE >> sb->s_blocksize_bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) unsigned int page_ra_count = PAGE_SIZE >> sb->s_blocksize_bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) unsigned int adj_ra_count = max(sbi->sect_per_clus, page_ra_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) unsigned int ra_count = min(adj_ra_count, max_ra_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) /* Read-ahead is not required */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) if (sbi->sect_per_clus == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) if (sec < sbi->data_start_sector) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) exfat_err(sb, "requested sector is invalid(sect:%llu, root:%llu)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) (unsigned long long)sec, sbi->data_start_sector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) /* Not sector aligned with ra_count, resize ra_count to page size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) if ((sec - sbi->data_start_sector) & (ra_count - 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) ra_count = page_ra_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) bh = sb_find_get_block(sb, sec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) if (!bh || !buffer_uptodate(bh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) for (i = 0; i < ra_count; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) sb_breadahead(sb, (sector_t)(sec + i));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) struct exfat_dentry *exfat_get_dentry(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) struct exfat_chain *p_dir, int entry, struct buffer_head **bh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) sector_t *sector)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) unsigned int dentries_per_page = EXFAT_B_TO_DEN(PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) int off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) sector_t sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) if (p_dir->dir == DIR_DELETED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) exfat_err(sb, "abnormal access to deleted dentry");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) if (exfat_find_location(sb, p_dir, entry, &sec, &off))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) if (p_dir->dir != EXFAT_FREE_CLUSTER &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) !(entry & (dentries_per_page - 1)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) exfat_dir_readahead(sb, sec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) *bh = sb_bread(sb, sec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) if (!*bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) if (sector)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) *sector = sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) return (struct exfat_dentry *)((*bh)->b_data + off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) enum exfat_validate_dentry_mode {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) ES_MODE_STARTED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) ES_MODE_GET_FILE_ENTRY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) ES_MODE_GET_STRM_ENTRY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) ES_MODE_GET_NAME_ENTRY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) ES_MODE_GET_CRITICAL_SEC_ENTRY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) static bool exfat_validate_entry(unsigned int type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) enum exfat_validate_dentry_mode *mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) if (type == TYPE_UNUSED || type == TYPE_DELETED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) switch (*mode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) case ES_MODE_STARTED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) if (type != TYPE_FILE && type != TYPE_DIR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) *mode = ES_MODE_GET_FILE_ENTRY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) case ES_MODE_GET_FILE_ENTRY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) if (type != TYPE_STREAM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) *mode = ES_MODE_GET_STRM_ENTRY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) case ES_MODE_GET_STRM_ENTRY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) if (type != TYPE_EXTEND)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) *mode = ES_MODE_GET_NAME_ENTRY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) case ES_MODE_GET_NAME_ENTRY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) if (type == TYPE_STREAM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) if (type != TYPE_EXTEND) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) if (!(type & TYPE_CRITICAL_SEC))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) *mode = ES_MODE_GET_CRITICAL_SEC_ENTRY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) case ES_MODE_GET_CRITICAL_SEC_ENTRY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) if (type == TYPE_EXTEND || type == TYPE_STREAM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) if ((type & TYPE_CRITICAL_SEC) != TYPE_CRITICAL_SEC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) WARN_ON_ONCE(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) struct exfat_dentry *exfat_get_dentry_cached(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) struct exfat_entry_set_cache *es, int num)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) int off = es->start_off + num * DENTRY_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) struct buffer_head *bh = es->bh[EXFAT_B_TO_BLK(off, es->sb)];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) char *p = bh->b_data + EXFAT_BLK_OFFSET(off, es->sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) return (struct exfat_dentry *)p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) * Returns a set of dentries for a file or dir.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) * Note It provides a direct pointer to bh->data via exfat_get_dentry_cached().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) * User should call exfat_get_dentry_set() after setting 'modified' to apply
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) * changes made in this entry set to the real device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) * in:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) * sb+p_dir+entry: indicates a file/dir
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) * type: specifies how many dentries should be included.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) * return:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) * pointer of entry set on success,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) * NULL on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) struct exfat_entry_set_cache *exfat_get_dentry_set(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) struct exfat_chain *p_dir, int entry, unsigned int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) int ret, i, num_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) unsigned int off, byte_offset, clu = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) sector_t sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) struct exfat_sb_info *sbi = EXFAT_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) struct exfat_entry_set_cache *es;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) struct exfat_dentry *ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) int num_entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) enum exfat_validate_dentry_mode mode = ES_MODE_STARTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) if (p_dir->dir == DIR_DELETED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) exfat_err(sb, "access to deleted dentry");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) byte_offset = EXFAT_DEN_TO_B(entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) ret = exfat_walk_fat_chain(sb, p_dir, byte_offset, &clu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) es = kzalloc(sizeof(*es), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) if (!es)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) es->sb = sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) es->modified = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) /* byte offset in cluster */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) byte_offset = EXFAT_CLU_OFFSET(byte_offset, sbi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) /* byte offset in sector */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) off = EXFAT_BLK_OFFSET(byte_offset, sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) es->start_off = off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) /* sector offset in cluster */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) sec = EXFAT_B_TO_BLK(byte_offset, sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) sec += exfat_cluster_to_sector(sbi, clu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) bh = sb_bread(sb, sec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) if (!bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) goto free_es;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) es->bh[es->num_bh++] = bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) ep = exfat_get_dentry_cached(es, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) if (!exfat_validate_entry(exfat_get_entry_type(ep), &mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) goto free_es;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) num_entries = type == ES_ALL_ENTRIES ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) ep->dentry.file.num_ext + 1 : type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) es->num_entries = num_entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) num_bh = EXFAT_B_TO_BLK_ROUND_UP(off + num_entries * DENTRY_SIZE, sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) for (i = 1; i < num_bh; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) /* get the next sector */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) if (exfat_is_last_sector_in_cluster(sbi, sec)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) if (p_dir->flags == ALLOC_NO_FAT_CHAIN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) clu++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) else if (exfat_get_next_cluster(sb, &clu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) goto free_es;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) sec = exfat_cluster_to_sector(sbi, clu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) sec++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) bh = sb_bread(sb, sec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) if (!bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) goto free_es;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) es->bh[es->num_bh++] = bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) /* validiate cached dentries */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) for (i = 1; i < num_entries; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) ep = exfat_get_dentry_cached(es, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) if (!exfat_validate_entry(exfat_get_entry_type(ep), &mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) goto free_es;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) return es;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) free_es:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) exfat_free_dentry_set(es, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) DIRENT_STEP_FILE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) DIRENT_STEP_STRM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) DIRENT_STEP_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) DIRENT_STEP_SECD,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) * return values:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) * >= 0 : return dir entiry position with the name in dir
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) * -ENOENT : entry with the name does not exist
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) * -EIO : I/O error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) int exfat_find_dir_entry(struct super_block *sb, struct exfat_inode_info *ei,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) int num_entries, unsigned int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) int i, rewind = 0, dentry = 0, end_eidx = 0, num_ext = 0, len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) int order, step, name_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) int dentries_per_clu, num_empty = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) unsigned int entry_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) unsigned short *uniname = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) struct exfat_chain clu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) struct exfat_hint *hint_stat = &ei->hint_stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) struct exfat_hint_femp candi_empty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) struct exfat_sb_info *sbi = EXFAT_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) dentries_per_clu = sbi->dentries_per_clu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) exfat_chain_dup(&clu, p_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) if (hint_stat->eidx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) clu.dir = hint_stat->clu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) dentry = hint_stat->eidx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) end_eidx = dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) candi_empty.eidx = EXFAT_HINT_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) rewind:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) order = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) step = DIRENT_STEP_FILE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) while (clu.dir != EXFAT_EOF_CLUSTER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) i = dentry & (dentries_per_clu - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) for (; i < dentries_per_clu; i++, dentry++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) struct exfat_dentry *ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) if (rewind && dentry == end_eidx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) goto not_found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) ep = exfat_get_dentry(sb, &clu, i, &bh, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) if (!ep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) entry_type = exfat_get_entry_type(ep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) if (entry_type == TYPE_UNUSED ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) entry_type == TYPE_DELETED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) step = DIRENT_STEP_FILE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) num_empty++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) if (candi_empty.eidx == EXFAT_HINT_NONE &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) num_empty == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) exfat_chain_set(&candi_empty.cur,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) clu.dir, clu.size, clu.flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) if (candi_empty.eidx == EXFAT_HINT_NONE &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) num_empty >= num_entries) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) candi_empty.eidx =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) dentry - (num_empty - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) WARN_ON(candi_empty.eidx < 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) candi_empty.count = num_empty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) if (ei->hint_femp.eidx ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) EXFAT_HINT_NONE ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) candi_empty.eidx <=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) ei->hint_femp.eidx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) ei->hint_femp = candi_empty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) if (entry_type == TYPE_UNUSED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) goto not_found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) num_empty = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) candi_empty.eidx = EXFAT_HINT_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) if (entry_type == TYPE_FILE || entry_type == TYPE_DIR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) step = DIRENT_STEP_FILE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) if (type == TYPE_ALL || type == entry_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) num_ext = ep->dentry.file.num_ext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) step = DIRENT_STEP_STRM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) if (entry_type == TYPE_STREAM) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) u16 name_hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) if (step != DIRENT_STEP_STRM) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) step = DIRENT_STEP_FILE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) step = DIRENT_STEP_FILE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) name_hash = le16_to_cpu(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) ep->dentry.stream.name_hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) if (p_uniname->name_hash == name_hash &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) p_uniname->name_len ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) ep->dentry.stream.name_len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) step = DIRENT_STEP_NAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) order = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) name_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) if (entry_type == TYPE_EXTEND) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) unsigned short entry_uniname[16], unichar;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) if (step != DIRENT_STEP_NAME) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) step = DIRENT_STEP_FILE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) if (++order == 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) uniname = p_uniname->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) uniname += EXFAT_FILE_NAME_LEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) len = exfat_extract_uni_name(ep, entry_uniname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) name_len += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) unichar = *(uniname+len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) *(uniname+len) = 0x0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) if (exfat_uniname_ncmp(sb, uniname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) entry_uniname, len)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) step = DIRENT_STEP_FILE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) } else if (p_uniname->name_len == name_len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) if (order == num_ext)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) goto found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) step = DIRENT_STEP_SECD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) *(uniname+len) = unichar;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) if (entry_type &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) (TYPE_CRITICAL_SEC | TYPE_BENIGN_SEC)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) if (step == DIRENT_STEP_SECD) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) if (++order == num_ext)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) goto found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) step = DIRENT_STEP_FILE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) if (clu.flags == ALLOC_NO_FAT_CHAIN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) if (--clu.size > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) clu.dir++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) clu.dir = EXFAT_EOF_CLUSTER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) if (exfat_get_next_cluster(sb, &clu.dir))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) not_found:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) * We started at not 0 index,so we should try to find target
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) * from 0 index to the index we started at.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) if (!rewind && end_eidx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) rewind = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) dentry = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) clu.dir = p_dir->dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) /* reset empty hint */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) num_empty = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) candi_empty.eidx = EXFAT_HINT_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) goto rewind;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) /* initialized hint_stat */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) hint_stat->clu = p_dir->dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) hint_stat->eidx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) found:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) /* next dentry we'll find is out of this cluster */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) if (!((dentry + 1) & (dentries_per_clu - 1))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) if (clu.flags == ALLOC_NO_FAT_CHAIN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) if (--clu.size > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) clu.dir++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) clu.dir = EXFAT_EOF_CLUSTER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) ret = exfat_get_next_cluster(sb, &clu.dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) if (ret || clu.dir == EXFAT_EOF_CLUSTER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) /* just initialized hint_stat */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) hint_stat->clu = p_dir->dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) hint_stat->eidx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) return (dentry - num_ext);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) hint_stat->clu = clu.dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) hint_stat->eidx = dentry + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) return dentry - num_ext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) int exfat_count_ext_entries(struct super_block *sb, struct exfat_chain *p_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) int entry, struct exfat_dentry *ep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) int i, count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) unsigned int type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) struct exfat_dentry *ext_ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) for (i = 0, entry++; i < ep->dentry.file.num_ext; i++, entry++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) ext_ep = exfat_get_dentry(sb, p_dir, entry, &bh, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) if (!ext_ep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) type = exfat_get_entry_type(ext_ep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) if (type == TYPE_EXTEND || type == TYPE_STREAM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) int exfat_count_dir_entries(struct super_block *sb, struct exfat_chain *p_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) int i, count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) int dentries_per_clu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) unsigned int entry_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) struct exfat_chain clu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) struct exfat_dentry *ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) struct exfat_sb_info *sbi = EXFAT_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) dentries_per_clu = sbi->dentries_per_clu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) exfat_chain_dup(&clu, p_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) while (clu.dir != EXFAT_EOF_CLUSTER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) for (i = 0; i < dentries_per_clu; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) ep = exfat_get_dentry(sb, &clu, i, &bh, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) if (!ep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) entry_type = exfat_get_entry_type(ep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) if (entry_type == TYPE_UNUSED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) if (entry_type != TYPE_DIR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) if (clu.flags == ALLOC_NO_FAT_CHAIN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) if (--clu.size > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) clu.dir++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) clu.dir = EXFAT_EOF_CLUSTER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) if (exfat_get_next_cluster(sb, &(clu.dir)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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