^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * fs/f2fs/dir.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2012 Samsung Electronics Co., Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * http://www.samsung.com/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/f2fs_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/sched/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/unicode.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "f2fs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include "node.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "acl.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "xattr.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <trace/events/f2fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #ifdef CONFIG_UNICODE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) extern struct kmem_cache *f2fs_cf_name_slab;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static unsigned long dir_blocks(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) return ((unsigned long long) (i_size_read(inode) + PAGE_SIZE - 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) >> PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static unsigned int dir_buckets(unsigned int level, int dir_level)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) if (level + dir_level < MAX_DIR_HASH_DEPTH / 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) return 1 << (level + dir_level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) return MAX_DIR_BUCKETS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static unsigned int bucket_blocks(unsigned int level)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) if (level < MAX_DIR_HASH_DEPTH / 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) return 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static unsigned char f2fs_filetype_table[F2FS_FT_MAX] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) [F2FS_FT_UNKNOWN] = DT_UNKNOWN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) [F2FS_FT_REG_FILE] = DT_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) [F2FS_FT_DIR] = DT_DIR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) [F2FS_FT_CHRDEV] = DT_CHR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) [F2FS_FT_BLKDEV] = DT_BLK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) [F2FS_FT_FIFO] = DT_FIFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) [F2FS_FT_SOCK] = DT_SOCK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) [F2FS_FT_SYMLINK] = DT_LNK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static unsigned char f2fs_type_by_mode[S_IFMT >> S_SHIFT] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) [S_IFREG >> S_SHIFT] = F2FS_FT_REG_FILE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) [S_IFDIR >> S_SHIFT] = F2FS_FT_DIR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) [S_IFCHR >> S_SHIFT] = F2FS_FT_CHRDEV,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) [S_IFBLK >> S_SHIFT] = F2FS_FT_BLKDEV,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) [S_IFIFO >> S_SHIFT] = F2FS_FT_FIFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) [S_IFSOCK >> S_SHIFT] = F2FS_FT_SOCK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) [S_IFLNK >> S_SHIFT] = F2FS_FT_SYMLINK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static void set_de_type(struct f2fs_dir_entry *de, umode_t mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) de->file_type = f2fs_type_by_mode[(mode & S_IFMT) >> S_SHIFT];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) unsigned char f2fs_get_de_type(struct f2fs_dir_entry *de)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (de->file_type < F2FS_FT_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) return f2fs_filetype_table[de->file_type];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return DT_UNKNOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) /* If @dir is casefolded, initialize @fname->cf_name from @fname->usr_fname. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) int f2fs_init_casefolded_name(const struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct f2fs_filename *fname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) #ifdef CONFIG_UNICODE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct super_block *sb = dir->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (IS_CASEFOLDED(dir)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) fname->cf_name.name = kmem_cache_alloc(f2fs_cf_name_slab,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) if (!fname->cf_name.name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) fname->cf_name.len = utf8_casefold(sb->s_encoding,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) fname->usr_fname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) fname->cf_name.name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) F2FS_NAME_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if ((int)fname->cf_name.len <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) kmem_cache_free(f2fs_cf_name_slab, fname->cf_name.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) fname->cf_name.name = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (sb_has_strict_encoding(sb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) /* fall back to treating name as opaque byte sequence */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static int __f2fs_setup_filename(const struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) const struct fscrypt_name *crypt_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) struct f2fs_filename *fname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) memset(fname, 0, sizeof(*fname));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) fname->usr_fname = crypt_name->usr_fname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) fname->disk_name = crypt_name->disk_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #ifdef CONFIG_FS_ENCRYPTION
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) fname->crypto_buf = crypt_name->crypto_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) if (crypt_name->is_nokey_name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) /* hash was decoded from the no-key name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) fname->hash = cpu_to_le32(crypt_name->hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) err = f2fs_init_casefolded_name(dir, fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) f2fs_free_filename(fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) f2fs_hash_filename(dir, fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) * Prepare to search for @iname in @dir. This is similar to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) * fscrypt_setup_filename(), but this also handles computing the casefolded name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) * and the f2fs dirhash if needed, then packing all the information about this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) * filename up into a 'struct f2fs_filename'.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) int f2fs_setup_filename(struct inode *dir, const struct qstr *iname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) int lookup, struct f2fs_filename *fname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) struct fscrypt_name crypt_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) err = fscrypt_setup_filename(dir, iname, lookup, &crypt_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return __f2fs_setup_filename(dir, &crypt_name, fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) * Prepare to look up @dentry in @dir. This is similar to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) * fscrypt_prepare_lookup(), but this also handles computing the casefolded name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) * and the f2fs dirhash if needed, then packing all the information about this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) * filename up into a 'struct f2fs_filename'.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) int f2fs_prepare_lookup(struct inode *dir, struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) struct f2fs_filename *fname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) struct fscrypt_name crypt_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) err = fscrypt_prepare_lookup(dir, dentry, &crypt_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) return __f2fs_setup_filename(dir, &crypt_name, fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) void f2fs_free_filename(struct f2fs_filename *fname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) #ifdef CONFIG_FS_ENCRYPTION
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) kfree(fname->crypto_buf.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) fname->crypto_buf.name = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) #ifdef CONFIG_UNICODE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (fname->cf_name.name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) kmem_cache_free(f2fs_cf_name_slab, fname->cf_name.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) fname->cf_name.name = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) static unsigned long dir_block_index(unsigned int level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) int dir_level, unsigned int idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) unsigned long i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) unsigned long bidx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) for (i = 0; i < level; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) bidx += dir_buckets(i, dir_level) * bucket_blocks(i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) bidx += idx * bucket_blocks(level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) return bidx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static struct f2fs_dir_entry *find_in_block(struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) struct page *dentry_page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) const struct f2fs_filename *fname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) int *max_slots)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) struct f2fs_dentry_block *dentry_blk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) struct f2fs_dentry_ptr d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) dentry_blk = (struct f2fs_dentry_block *)page_address(dentry_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) make_dentry_ptr_block(dir, &d, dentry_blk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) return f2fs_find_target_dentry(&d, fname, max_slots);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) #ifdef CONFIG_UNICODE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) * Test whether a case-insensitive directory entry matches the filename
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) * being searched for.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) * Returns 1 for a match, 0 for no match, and -errno on an error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) static int f2fs_match_ci_name(const struct inode *dir, const struct qstr *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) const u8 *de_name, u32 de_name_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) const struct super_block *sb = dir->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) const struct unicode_map *um = sb->s_encoding;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) struct fscrypt_str decrypted_name = FSTR_INIT(NULL, de_name_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) struct qstr entry = QSTR_INIT(de_name, de_name_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) if (IS_ENCRYPTED(dir)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) const struct fscrypt_str encrypted_name =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) FSTR_INIT((u8 *)de_name, de_name_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) if (WARN_ON_ONCE(!fscrypt_has_encryption_key(dir)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) decrypted_name.name = kmalloc(de_name_len, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) if (!decrypted_name.name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) res = fscrypt_fname_disk_to_usr(dir, 0, 0, &encrypted_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) &decrypted_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if (res < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) entry.name = decrypted_name.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) entry.len = decrypted_name.len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) res = utf8_strncasecmp_folded(um, name, &entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) * In strict mode, ignore invalid names. In non-strict mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) * fall back to treating them as opaque byte sequences.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) if (res < 0 && !sb_has_strict_encoding(sb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) res = name->len == entry.len &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) memcmp(name->name, entry.name, name->len) == 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) /* utf8_strncasecmp_folded returns 0 on match */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) res = (res == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) kfree(decrypted_name.name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) #endif /* CONFIG_UNICODE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) static inline int f2fs_match_name(const struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) const struct f2fs_filename *fname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) const u8 *de_name, u32 de_name_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) struct fscrypt_name f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) #ifdef CONFIG_UNICODE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) if (fname->cf_name.name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) struct qstr cf = FSTR_TO_QSTR(&fname->cf_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) return f2fs_match_ci_name(dir, &cf, de_name, de_name_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) f.usr_fname = fname->usr_fname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) f.disk_name = fname->disk_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) #ifdef CONFIG_FS_ENCRYPTION
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) f.crypto_buf = fname->crypto_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) return fscrypt_match_name(&f, de_name, de_name_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) struct f2fs_dir_entry *f2fs_find_target_dentry(const struct f2fs_dentry_ptr *d,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) const struct f2fs_filename *fname, int *max_slots)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) struct f2fs_dir_entry *de;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) unsigned long bit_pos = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) int max_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) int res = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) if (max_slots)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) *max_slots = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) while (bit_pos < d->max) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) if (!test_bit_le(bit_pos, d->bitmap)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) bit_pos++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) max_len++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) de = &d->dentry[bit_pos];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) if (unlikely(!de->name_len)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) bit_pos++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) if (de->hash_code == fname->hash) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) res = f2fs_match_name(d->inode, fname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) d->filename[bit_pos],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) le16_to_cpu(de->name_len));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) if (res < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) return ERR_PTR(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) goto found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) if (max_slots && max_len > *max_slots)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) *max_slots = max_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) max_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) de = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) found:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) if (max_slots && max_len > *max_slots)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) *max_slots = max_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) return de;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) static struct f2fs_dir_entry *find_in_level(struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) unsigned int level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) const struct f2fs_filename *fname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) struct page **res_page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) int s = GET_DENTRY_SLOTS(fname->disk_name.len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) unsigned int nbucket, nblock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) unsigned int bidx, end_block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) struct page *dentry_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) struct f2fs_dir_entry *de = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) bool room = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) int max_slots;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) nbucket = dir_buckets(level, F2FS_I(dir)->i_dir_level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) nblock = bucket_blocks(level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) bidx = dir_block_index(level, F2FS_I(dir)->i_dir_level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) le32_to_cpu(fname->hash) % nbucket);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) end_block = bidx + nblock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) for (; bidx < end_block; bidx++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) /* no need to allocate new dentry pages to all the indices */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) dentry_page = f2fs_find_data_page(dir, bidx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) if (IS_ERR(dentry_page)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) if (PTR_ERR(dentry_page) == -ENOENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) room = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) *res_page = dentry_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) de = find_in_block(dir, dentry_page, fname, &max_slots);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) if (IS_ERR(de)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) *res_page = ERR_CAST(de);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) de = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) } else if (de) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) *res_page = dentry_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) if (max_slots >= s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) room = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) f2fs_put_page(dentry_page, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) if (!de && room && F2FS_I(dir)->chash != fname->hash) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) F2FS_I(dir)->chash = fname->hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) F2FS_I(dir)->clevel = level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) return de;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) struct f2fs_dir_entry *__f2fs_find_entry(struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) const struct f2fs_filename *fname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) struct page **res_page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) unsigned long npages = dir_blocks(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) struct f2fs_dir_entry *de = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) unsigned int max_depth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) unsigned int level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) *res_page = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) if (f2fs_has_inline_dentry(dir)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) de = f2fs_find_in_inline_dir(dir, fname, res_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) if (npages == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) max_depth = F2FS_I(dir)->i_current_depth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) if (unlikely(max_depth > MAX_DIR_HASH_DEPTH)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) f2fs_warn(F2FS_I_SB(dir), "Corrupted max_depth of %lu: %u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) dir->i_ino, max_depth);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) max_depth = MAX_DIR_HASH_DEPTH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) f2fs_i_depth_write(dir, max_depth);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) for (level = 0; level < max_depth; level++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) de = find_in_level(dir, level, fname, res_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) if (de || IS_ERR(*res_page))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) /* This is to increase the speed of f2fs_create */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) if (!de)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) F2FS_I(dir)->task = current;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) return de;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) * Find an entry in the specified directory with the wanted name.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) * It returns the page where the entry was found (as a parameter - res_page),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) * and the entry itself. Page is returned mapped and unlocked.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) * Entry is guaranteed to be valid.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) struct f2fs_dir_entry *f2fs_find_entry(struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) const struct qstr *child, struct page **res_page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) struct f2fs_dir_entry *de = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) struct f2fs_filename fname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) err = f2fs_setup_filename(dir, child, 1, &fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) if (err == -ENOENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) *res_page = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) *res_page = ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) de = __f2fs_find_entry(dir, &fname, res_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) f2fs_free_filename(&fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) return de;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) struct f2fs_dir_entry *f2fs_parent_dir(struct inode *dir, struct page **p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) struct qstr dotdot = QSTR_INIT("..", 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) return f2fs_find_entry(dir, &dotdot, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) ino_t f2fs_inode_by_name(struct inode *dir, const struct qstr *qstr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) struct page **page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) ino_t res = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) struct f2fs_dir_entry *de;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) de = f2fs_find_entry(dir, qstr, page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) if (de) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) res = le32_to_cpu(de->ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) f2fs_put_page(*page, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) void f2fs_set_link(struct inode *dir, struct f2fs_dir_entry *de,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) struct page *page, struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) enum page_type type = f2fs_has_inline_dentry(dir) ? NODE : DATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) lock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) f2fs_wait_on_page_writeback(page, type, true, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) de->ino = cpu_to_le32(inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) set_de_type(de, inode->i_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) set_page_dirty(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) dir->i_mtime = dir->i_ctime = current_time(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) f2fs_mark_inode_dirty_sync(dir, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) f2fs_put_page(page, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) static void init_dent_inode(struct inode *dir, struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) const struct f2fs_filename *fname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) struct page *ipage)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) struct f2fs_inode *ri;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) if (!fname) /* tmpfile case? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) f2fs_wait_on_page_writeback(ipage, NODE, true, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) /* copy name info. to this inode page */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) ri = F2FS_INODE(ipage);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) ri->i_namelen = cpu_to_le32(fname->disk_name.len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) memcpy(ri->i_name, fname->disk_name.name, fname->disk_name.len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) if (IS_ENCRYPTED(dir)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) file_set_enc_name(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) * Roll-forward recovery doesn't have encryption keys available,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) * so it can't compute the dirhash for encrypted+casefolded
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) * filenames. Append it to i_name if possible. Else, disable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) * roll-forward recovery of the dentry (i.e., make fsync'ing the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) * file force a checkpoint) by setting LOST_PINO.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) if (IS_CASEFOLDED(dir)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) if (fname->disk_name.len + sizeof(f2fs_hash_t) <=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) F2FS_NAME_LEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) put_unaligned(fname->hash, (f2fs_hash_t *)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) &ri->i_name[fname->disk_name.len]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) file_lost_pino(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) set_page_dirty(ipage);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) void f2fs_do_make_empty_dir(struct inode *inode, struct inode *parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) struct f2fs_dentry_ptr *d)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) struct fscrypt_str dot = FSTR_INIT(".", 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) struct fscrypt_str dotdot = FSTR_INIT("..", 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) /* update dirent of "." */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) f2fs_update_dentry(inode->i_ino, inode->i_mode, d, &dot, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) /* update dirent of ".." */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) f2fs_update_dentry(parent->i_ino, parent->i_mode, d, &dotdot, 0, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) static int make_empty_dir(struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) struct inode *parent, struct page *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) struct page *dentry_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) struct f2fs_dentry_block *dentry_blk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) struct f2fs_dentry_ptr d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) if (f2fs_has_inline_dentry(inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) return f2fs_make_empty_inline_dir(inode, parent, page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) dentry_page = f2fs_get_new_data_page(inode, page, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) if (IS_ERR(dentry_page))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) return PTR_ERR(dentry_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) dentry_blk = page_address(dentry_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) make_dentry_ptr_block(NULL, &d, dentry_blk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) f2fs_do_make_empty_dir(inode, parent, &d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) set_page_dirty(dentry_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) f2fs_put_page(dentry_page, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) struct page *f2fs_init_inode_metadata(struct inode *inode, struct inode *dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) const struct f2fs_filename *fname, struct page *dpage)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) struct page *page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) if (is_inode_flag_set(inode, FI_NEW_INODE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) page = f2fs_new_inode_page(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) if (IS_ERR(page))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) return page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) if (S_ISDIR(inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) /* in order to handle error case */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) get_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) err = make_empty_dir(inode, dir, page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) lock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) goto put_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) put_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) err = f2fs_init_acl(inode, dir, page, dpage);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) goto put_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) err = f2fs_init_security(inode, dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) fname ? fname->usr_fname : NULL, page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) goto put_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) if (IS_ENCRYPTED(inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) err = fscrypt_set_context(inode, page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) goto put_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) page = f2fs_get_node_page(F2FS_I_SB(dir), inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) if (IS_ERR(page))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) return page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) init_dent_inode(dir, inode, fname, page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) * This file should be checkpointed during fsync.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) * We lost i_pino from now on.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) if (is_inode_flag_set(inode, FI_INC_LINK)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) if (!S_ISDIR(inode->i_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) file_lost_pino(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) * If link the tmpfile to alias through linkat path,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) * we should remove this inode from orphan list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) if (inode->i_nlink == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) f2fs_remove_orphan_inode(F2FS_I_SB(dir), inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) f2fs_i_links_write(inode, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) return page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) put_error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) clear_nlink(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) f2fs_update_inode(inode, page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) f2fs_put_page(page, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) return ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) void f2fs_update_parent_metadata(struct inode *dir, struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) unsigned int current_depth)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) if (inode && is_inode_flag_set(inode, FI_NEW_INODE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) if (S_ISDIR(inode->i_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) f2fs_i_links_write(dir, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) clear_inode_flag(inode, FI_NEW_INODE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) dir->i_mtime = dir->i_ctime = current_time(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) f2fs_mark_inode_dirty_sync(dir, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) if (F2FS_I(dir)->i_current_depth != current_depth)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) f2fs_i_depth_write(dir, current_depth);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) if (inode && is_inode_flag_set(inode, FI_INC_LINK))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) clear_inode_flag(inode, FI_INC_LINK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) int f2fs_room_for_filename(const void *bitmap, int slots, int max_slots)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) int bit_start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) int zero_start, zero_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) next:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) zero_start = find_next_zero_bit_le(bitmap, max_slots, bit_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) if (zero_start >= max_slots)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) return max_slots;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) zero_end = find_next_bit_le(bitmap, max_slots, zero_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) if (zero_end - zero_start >= slots)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) return zero_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) bit_start = zero_end + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) if (zero_end + 1 >= max_slots)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) return max_slots;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) goto next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) bool f2fs_has_enough_room(struct inode *dir, struct page *ipage,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) const struct f2fs_filename *fname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) struct f2fs_dentry_ptr d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) unsigned int bit_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) int slots = GET_DENTRY_SLOTS(fname->disk_name.len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) make_dentry_ptr_inline(dir, &d, inline_data_addr(dir, ipage));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) bit_pos = f2fs_room_for_filename(d.bitmap, slots, d.max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) return bit_pos < d.max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) void f2fs_update_dentry(nid_t ino, umode_t mode, struct f2fs_dentry_ptr *d,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) const struct fscrypt_str *name, f2fs_hash_t name_hash,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) unsigned int bit_pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) struct f2fs_dir_entry *de;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) int slots = GET_DENTRY_SLOTS(name->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) de = &d->dentry[bit_pos];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) de->hash_code = name_hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) de->name_len = cpu_to_le16(name->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) memcpy(d->filename[bit_pos], name->name, name->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) de->ino = cpu_to_le32(ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) set_de_type(de, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) for (i = 0; i < slots; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) __set_bit_le(bit_pos + i, (void *)d->bitmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) /* avoid wrong garbage data for readdir */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) if (i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) (de + i)->name_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) int f2fs_add_regular_entry(struct inode *dir, const struct f2fs_filename *fname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) struct inode *inode, nid_t ino, umode_t mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) unsigned int bit_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) unsigned int level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) unsigned int current_depth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) unsigned long bidx, block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) unsigned int nbucket, nblock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) struct page *dentry_page = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) struct f2fs_dentry_block *dentry_blk = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) struct f2fs_dentry_ptr d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) struct page *page = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) int slots, err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) level = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) slots = GET_DENTRY_SLOTS(fname->disk_name.len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) current_depth = F2FS_I(dir)->i_current_depth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) if (F2FS_I(dir)->chash == fname->hash) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) level = F2FS_I(dir)->clevel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) F2FS_I(dir)->chash = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) start:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) if (time_to_inject(F2FS_I_SB(dir), FAULT_DIR_DEPTH)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) f2fs_show_injection_info(F2FS_I_SB(dir), FAULT_DIR_DEPTH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) return -ENOSPC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) if (unlikely(current_depth == MAX_DIR_HASH_DEPTH))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) return -ENOSPC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) /* Increase the depth, if required */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) if (level == current_depth)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) ++current_depth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) nbucket = dir_buckets(level, F2FS_I(dir)->i_dir_level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) nblock = bucket_blocks(level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) bidx = dir_block_index(level, F2FS_I(dir)->i_dir_level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) (le32_to_cpu(fname->hash) % nbucket));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) for (block = bidx; block <= (bidx + nblock - 1); block++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) dentry_page = f2fs_get_new_data_page(dir, NULL, block, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) if (IS_ERR(dentry_page))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) return PTR_ERR(dentry_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) dentry_blk = page_address(dentry_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) bit_pos = f2fs_room_for_filename(&dentry_blk->dentry_bitmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) slots, NR_DENTRY_IN_BLOCK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) if (bit_pos < NR_DENTRY_IN_BLOCK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) goto add_dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) f2fs_put_page(dentry_page, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) /* Move to next level to find the empty slot for new dentry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) ++level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) goto start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) add_dentry:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) f2fs_wait_on_page_writeback(dentry_page, DATA, true, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) if (inode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) f2fs_down_write(&F2FS_I(inode)->i_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) page = f2fs_init_inode_metadata(inode, dir, fname, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) if (IS_ERR(page)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) err = PTR_ERR(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) make_dentry_ptr_block(NULL, &d, dentry_blk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) f2fs_update_dentry(ino, mode, &d, &fname->disk_name, fname->hash,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) bit_pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) set_page_dirty(dentry_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) if (inode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) f2fs_i_pino_write(inode, dir->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) /* synchronize inode page's data from inode cache */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) if (is_inode_flag_set(inode, FI_NEW_INODE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) f2fs_update_inode(inode, page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) f2fs_put_page(page, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) f2fs_update_parent_metadata(dir, inode, current_depth);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) if (inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) f2fs_up_write(&F2FS_I(inode)->i_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) f2fs_put_page(dentry_page, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) return err;
^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) int f2fs_add_dentry(struct inode *dir, const struct f2fs_filename *fname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) struct inode *inode, nid_t ino, umode_t mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) int err = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) if (f2fs_has_inline_dentry(dir))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) err = f2fs_add_inline_entry(dir, fname, inode, ino, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) if (err == -EAGAIN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) err = f2fs_add_regular_entry(dir, fname, inode, ino, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) f2fs_update_time(F2FS_I_SB(dir), REQ_TIME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) * Caller should grab and release a rwsem by calling f2fs_lock_op() and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) * f2fs_unlock_op().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) int f2fs_do_add_link(struct inode *dir, const struct qstr *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) struct inode *inode, nid_t ino, umode_t mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) struct f2fs_filename fname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) struct page *page = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) struct f2fs_dir_entry *de = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) err = f2fs_setup_filename(dir, name, 0, &fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) return err;
^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) * An immature stackable filesystem shows a race condition between lookup
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) * and create. If we have same task when doing lookup and create, it's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) * definitely fine as expected by VFS normally. Otherwise, let's just
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) * verify on-disk dentry one more time, which guarantees filesystem
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) * consistency more.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) if (current != F2FS_I(dir)->task) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) de = __f2fs_find_entry(dir, &fname, &page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) F2FS_I(dir)->task = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) if (de) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) f2fs_put_page(page, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) err = -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) } else if (IS_ERR(page)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) err = PTR_ERR(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) err = f2fs_add_dentry(dir, &fname, inode, ino, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) f2fs_free_filename(&fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) int f2fs_do_tmpfile(struct inode *inode, struct inode *dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) struct page *page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) f2fs_down_write(&F2FS_I(inode)->i_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) page = f2fs_init_inode_metadata(inode, dir, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) if (IS_ERR(page)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) err = PTR_ERR(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) f2fs_put_page(page, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) clear_inode_flag(inode, FI_NEW_INODE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) f2fs_up_write(&F2FS_I(inode)->i_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) void f2fs_drop_nlink(struct inode *dir, struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) f2fs_down_write(&F2FS_I(inode)->i_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) if (S_ISDIR(inode->i_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) f2fs_i_links_write(dir, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) inode->i_ctime = current_time(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) f2fs_i_links_write(inode, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) if (S_ISDIR(inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) f2fs_i_links_write(inode, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) f2fs_i_size_write(inode, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) f2fs_up_write(&F2FS_I(inode)->i_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) if (inode->i_nlink == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) f2fs_add_orphan_inode(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) f2fs_release_orphan_inode(sbi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) * It only removes the dentry from the dentry page, corresponding name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) * entry in name page does not need to be touched during deletion.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) struct inode *dir, struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) struct f2fs_dentry_block *dentry_blk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) unsigned int bit_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) f2fs_update_time(F2FS_I_SB(dir), REQ_TIME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) if (F2FS_OPTION(F2FS_I_SB(dir)).fsync_mode == FSYNC_MODE_STRICT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) f2fs_add_ino_entry(F2FS_I_SB(dir), dir->i_ino, TRANS_DIR_INO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) if (f2fs_has_inline_dentry(dir))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) return f2fs_delete_inline_entry(dentry, page, dir, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) lock_page(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) f2fs_wait_on_page_writeback(page, DATA, true, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) dentry_blk = page_address(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) bit_pos = dentry - dentry_blk->dentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) for (i = 0; i < slots; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) __clear_bit_le(bit_pos + i, &dentry_blk->dentry_bitmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) /* Let's check and deallocate this dentry page */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) NR_DENTRY_IN_BLOCK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) set_page_dirty(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) if (bit_pos == NR_DENTRY_IN_BLOCK &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) !f2fs_truncate_hole(dir, page->index, page->index + 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) f2fs_clear_page_cache_dirty_tag(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) clear_page_dirty_for_io(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) ClearPageUptodate(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) clear_page_private_gcing(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) inode_dec_dirty_pages(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) f2fs_remove_dirty_inode(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) detach_page_private(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) set_page_private(page, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) f2fs_put_page(page, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) dir->i_ctime = dir->i_mtime = current_time(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) f2fs_mark_inode_dirty_sync(dir, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) if (inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) f2fs_drop_nlink(dir, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) bool f2fs_empty_dir(struct inode *dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) unsigned long bidx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) struct page *dentry_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) unsigned int bit_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) struct f2fs_dentry_block *dentry_blk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) unsigned long nblock = dir_blocks(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) if (f2fs_has_inline_dentry(dir))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) return f2fs_empty_inline_dir(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) for (bidx = 0; bidx < nblock; bidx++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) dentry_page = f2fs_get_lock_data_page(dir, bidx, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) if (IS_ERR(dentry_page)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) if (PTR_ERR(dentry_page) == -ENOENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) dentry_blk = page_address(dentry_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) if (bidx == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) bit_pos = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) bit_pos = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) NR_DENTRY_IN_BLOCK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) bit_pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) f2fs_put_page(dentry_page, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) if (bit_pos < NR_DENTRY_IN_BLOCK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) int f2fs_fill_dentries(struct dir_context *ctx, struct f2fs_dentry_ptr *d,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) unsigned int start_pos, struct fscrypt_str *fstr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) unsigned char d_type = DT_UNKNOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) unsigned int bit_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) struct f2fs_dir_entry *de = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) struct fscrypt_str de_name = FSTR_INIT(NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) struct f2fs_sb_info *sbi = F2FS_I_SB(d->inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) struct blk_plug plug;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) bool readdir_ra = sbi->readdir_ra == 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) bool found_valid_dirent = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) bit_pos = ((unsigned long)ctx->pos % d->max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) if (readdir_ra)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) blk_start_plug(&plug);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) while (bit_pos < d->max) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) bit_pos = find_next_bit_le(d->bitmap, d->max, bit_pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) if (bit_pos >= d->max)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) de = &d->dentry[bit_pos];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) if (de->name_len == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) if (found_valid_dirent || !bit_pos) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) printk_ratelimited(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) "%sF2FS-fs (%s): invalid namelen(0), ino:%u, run fsck to fix.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) KERN_WARNING, sbi->sb->s_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) le32_to_cpu(de->ino));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) set_sbi_flag(sbi, SBI_NEED_FSCK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) bit_pos++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) ctx->pos = start_pos + bit_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) d_type = f2fs_get_de_type(de);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) de_name.name = d->filename[bit_pos];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) de_name.len = le16_to_cpu(de->name_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) /* check memory boundary before moving forward */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) if (unlikely(bit_pos > d->max ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) le16_to_cpu(de->name_len) > F2FS_NAME_LEN)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) f2fs_warn(sbi, "%s: corrupted namelen=%d, run fsck to fix.",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) __func__, le16_to_cpu(de->name_len));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) set_sbi_flag(sbi, SBI_NEED_FSCK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) err = -EFSCORRUPTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) if (IS_ENCRYPTED(d->inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) int save_len = fstr->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) err = fscrypt_fname_disk_to_usr(d->inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) (u32)le32_to_cpu(de->hash_code),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) 0, &de_name, fstr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) de_name = *fstr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) fstr->len = save_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) if (!dir_emit(ctx, de_name.name, de_name.len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) le32_to_cpu(de->ino), d_type)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) err = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) if (readdir_ra)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) f2fs_ra_node_page(sbi, le32_to_cpu(de->ino));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) ctx->pos = start_pos + bit_pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) found_valid_dirent = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) if (readdir_ra)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) blk_finish_plug(&plug);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) return err;
^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) static int f2fs_readdir(struct file *file, struct dir_context *ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) struct inode *inode = file_inode(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) unsigned long npages = dir_blocks(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) struct f2fs_dentry_block *dentry_blk = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) struct page *dentry_page = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) struct file_ra_state *ra = &file->f_ra;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) loff_t start_pos = ctx->pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) unsigned int n = ((unsigned long)ctx->pos / NR_DENTRY_IN_BLOCK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) struct f2fs_dentry_ptr d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) struct fscrypt_str fstr = FSTR_INIT(NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) if (IS_ENCRYPTED(inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) err = fscrypt_prepare_readdir(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) err = fscrypt_fname_alloc_buffer(F2FS_NAME_LEN, &fstr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) if (f2fs_has_inline_dentry(inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) err = f2fs_read_inline_dir(file, ctx, &fstr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) goto out_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) for (; n < npages; n++, ctx->pos = n * NR_DENTRY_IN_BLOCK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) /* allow readdir() to be interrupted */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) if (fatal_signal_pending(current)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) err = -ERESTARTSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) goto out_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) cond_resched();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) /* readahead for multi pages of dir */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) if (npages - n > 1 && !ra_has_index(ra, n))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) page_cache_sync_readahead(inode->i_mapping, ra, file, n,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) min(npages - n, (pgoff_t)MAX_DIR_RA_PAGES));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) dentry_page = f2fs_find_data_page(inode, n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) if (IS_ERR(dentry_page)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) err = PTR_ERR(dentry_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) if (err == -ENOENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) goto out_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) dentry_blk = page_address(dentry_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) make_dentry_ptr_block(inode, &d, dentry_blk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) err = f2fs_fill_dentries(ctx, &d,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) n * NR_DENTRY_IN_BLOCK, &fstr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) f2fs_put_page(dentry_page, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) f2fs_put_page(dentry_page, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) out_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) fscrypt_fname_free_buffer(&fstr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) trace_f2fs_readdir(inode, start_pos, ctx->pos, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) return err < 0 ? err : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) const struct file_operations f2fs_dir_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) .llseek = generic_file_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) .read = generic_read_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) .iterate_shared = f2fs_readdir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) .fsync = f2fs_sync_file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) .unlocked_ioctl = f2fs_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) .compat_ioctl = f2fs_compat_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) };
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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