mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 10:36:42 +07:00
02027d42c3
CURRENT_TIME_SEC is not y2038 safe. current_time() will be transitioned to use 64 bit time along with vfs in a separate patch. There is no plan to transistion CURRENT_TIME_SEC to use y2038 safe time interfaces. current_time() will also be extended to use superblock range checking parameters when range checking is introduced. This works because alloc_super() fills in the the s_time_gran in super block to NSEC_PER_SEC. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
525 lines
14 KiB
C
525 lines
14 KiB
C
/*
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* linux/fs/hfsplus/catalog.c
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*
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* Copyright (C) 2001
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* Brad Boyer (flar@allandria.com)
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* (C) 2003 Ardis Technologies <roman@ardistech.com>
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*
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* Handling of catalog records
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*/
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#include "hfsplus_fs.h"
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#include "hfsplus_raw.h"
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int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *k1,
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const hfsplus_btree_key *k2)
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{
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__be32 k1p, k2p;
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k1p = k1->cat.parent;
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k2p = k2->cat.parent;
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if (k1p != k2p)
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return be32_to_cpu(k1p) < be32_to_cpu(k2p) ? -1 : 1;
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return hfsplus_strcasecmp(&k1->cat.name, &k2->cat.name);
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}
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int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *k1,
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const hfsplus_btree_key *k2)
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{
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__be32 k1p, k2p;
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k1p = k1->cat.parent;
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k2p = k2->cat.parent;
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if (k1p != k2p)
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return be32_to_cpu(k1p) < be32_to_cpu(k2p) ? -1 : 1;
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return hfsplus_strcmp(&k1->cat.name, &k2->cat.name);
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}
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/* Generates key for catalog file/folders record. */
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int hfsplus_cat_build_key(struct super_block *sb,
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hfsplus_btree_key *key, u32 parent, const struct qstr *str)
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{
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int len, err;
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key->cat.parent = cpu_to_be32(parent);
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err = hfsplus_asc2uni(sb, &key->cat.name, HFSPLUS_MAX_STRLEN,
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str->name, str->len);
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if (unlikely(err < 0))
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return err;
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len = be16_to_cpu(key->cat.name.length);
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key->key_len = cpu_to_be16(6 + 2 * len);
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return 0;
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}
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/* Generates key for catalog thread record. */
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void hfsplus_cat_build_key_with_cnid(struct super_block *sb,
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hfsplus_btree_key *key, u32 parent)
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{
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key->cat.parent = cpu_to_be32(parent);
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key->cat.name.length = 0;
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key->key_len = cpu_to_be16(6);
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}
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static void hfsplus_cat_build_key_uni(hfsplus_btree_key *key, u32 parent,
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struct hfsplus_unistr *name)
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{
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int ustrlen;
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ustrlen = be16_to_cpu(name->length);
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key->cat.parent = cpu_to_be32(parent);
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key->cat.name.length = cpu_to_be16(ustrlen);
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ustrlen *= 2;
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memcpy(key->cat.name.unicode, name->unicode, ustrlen);
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key->key_len = cpu_to_be16(6 + ustrlen);
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}
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void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms)
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{
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if (inode->i_flags & S_IMMUTABLE)
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perms->rootflags |= HFSPLUS_FLG_IMMUTABLE;
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else
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perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE;
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if (inode->i_flags & S_APPEND)
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perms->rootflags |= HFSPLUS_FLG_APPEND;
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else
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perms->rootflags &= ~HFSPLUS_FLG_APPEND;
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perms->userflags = HFSPLUS_I(inode)->userflags;
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perms->mode = cpu_to_be16(inode->i_mode);
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perms->owner = cpu_to_be32(i_uid_read(inode));
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perms->group = cpu_to_be32(i_gid_read(inode));
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if (S_ISREG(inode->i_mode))
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perms->dev = cpu_to_be32(inode->i_nlink);
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else if (S_ISBLK(inode->i_mode) || S_ISCHR(inode->i_mode))
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perms->dev = cpu_to_be32(inode->i_rdev);
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else
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perms->dev = 0;
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}
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static int hfsplus_cat_build_record(hfsplus_cat_entry *entry,
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u32 cnid, struct inode *inode)
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{
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struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
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if (S_ISDIR(inode->i_mode)) {
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struct hfsplus_cat_folder *folder;
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folder = &entry->folder;
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memset(folder, 0, sizeof(*folder));
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folder->type = cpu_to_be16(HFSPLUS_FOLDER);
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if (test_bit(HFSPLUS_SB_HFSX, &sbi->flags))
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folder->flags |= cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT);
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folder->id = cpu_to_be32(inode->i_ino);
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HFSPLUS_I(inode)->create_date =
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folder->create_date =
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folder->content_mod_date =
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folder->attribute_mod_date =
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folder->access_date = hfsp_now2mt();
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hfsplus_cat_set_perms(inode, &folder->permissions);
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if (inode == sbi->hidden_dir)
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/* invisible and namelocked */
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folder->user_info.frFlags = cpu_to_be16(0x5000);
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return sizeof(*folder);
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} else {
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struct hfsplus_cat_file *file;
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file = &entry->file;
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memset(file, 0, sizeof(*file));
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file->type = cpu_to_be16(HFSPLUS_FILE);
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file->flags = cpu_to_be16(HFSPLUS_FILE_THREAD_EXISTS);
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file->id = cpu_to_be32(cnid);
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HFSPLUS_I(inode)->create_date =
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file->create_date =
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file->content_mod_date =
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file->attribute_mod_date =
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file->access_date = hfsp_now2mt();
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if (cnid == inode->i_ino) {
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hfsplus_cat_set_perms(inode, &file->permissions);
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if (S_ISLNK(inode->i_mode)) {
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file->user_info.fdType =
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cpu_to_be32(HFSP_SYMLINK_TYPE);
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file->user_info.fdCreator =
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cpu_to_be32(HFSP_SYMLINK_CREATOR);
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} else {
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file->user_info.fdType =
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cpu_to_be32(sbi->type);
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file->user_info.fdCreator =
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cpu_to_be32(sbi->creator);
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}
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if (HFSPLUS_FLG_IMMUTABLE &
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(file->permissions.rootflags |
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file->permissions.userflags))
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file->flags |=
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cpu_to_be16(HFSPLUS_FILE_LOCKED);
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} else {
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file->user_info.fdType =
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cpu_to_be32(HFSP_HARDLINK_TYPE);
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file->user_info.fdCreator =
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cpu_to_be32(HFSP_HFSPLUS_CREATOR);
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file->user_info.fdFlags =
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cpu_to_be16(0x100);
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file->create_date =
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HFSPLUS_I(sbi->hidden_dir)->create_date;
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file->permissions.dev =
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cpu_to_be32(HFSPLUS_I(inode)->linkid);
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}
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return sizeof(*file);
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}
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}
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static int hfsplus_fill_cat_thread(struct super_block *sb,
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hfsplus_cat_entry *entry, int type,
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u32 parentid, const struct qstr *str)
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{
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int err;
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entry->type = cpu_to_be16(type);
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entry->thread.reserved = 0;
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entry->thread.parentID = cpu_to_be32(parentid);
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err = hfsplus_asc2uni(sb, &entry->thread.nodeName, HFSPLUS_MAX_STRLEN,
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str->name, str->len);
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if (unlikely(err < 0))
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return err;
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return 10 + be16_to_cpu(entry->thread.nodeName.length) * 2;
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}
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/* Try to get a catalog entry for given catalog id */
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int hfsplus_find_cat(struct super_block *sb, u32 cnid,
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struct hfs_find_data *fd)
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{
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hfsplus_cat_entry tmp;
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int err;
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u16 type;
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hfsplus_cat_build_key_with_cnid(sb, fd->search_key, cnid);
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err = hfs_brec_read(fd, &tmp, sizeof(hfsplus_cat_entry));
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if (err)
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return err;
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type = be16_to_cpu(tmp.type);
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if (type != HFSPLUS_FOLDER_THREAD && type != HFSPLUS_FILE_THREAD) {
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pr_err("found bad thread record in catalog\n");
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return -EIO;
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}
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if (be16_to_cpu(tmp.thread.nodeName.length) > 255) {
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pr_err("catalog name length corrupted\n");
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return -EIO;
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}
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hfsplus_cat_build_key_uni(fd->search_key,
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be32_to_cpu(tmp.thread.parentID),
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&tmp.thread.nodeName);
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return hfs_brec_find(fd, hfs_find_rec_by_key);
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}
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static void hfsplus_subfolders_inc(struct inode *dir)
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{
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struct hfsplus_sb_info *sbi = HFSPLUS_SB(dir->i_sb);
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if (test_bit(HFSPLUS_SB_HFSX, &sbi->flags)) {
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/*
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* Increment subfolder count. Note, the value is only meaningful
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* for folders with HFSPLUS_HAS_FOLDER_COUNT flag set.
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*/
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HFSPLUS_I(dir)->subfolders++;
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}
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}
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static void hfsplus_subfolders_dec(struct inode *dir)
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{
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struct hfsplus_sb_info *sbi = HFSPLUS_SB(dir->i_sb);
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if (test_bit(HFSPLUS_SB_HFSX, &sbi->flags)) {
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/*
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* Decrement subfolder count. Note, the value is only meaningful
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* for folders with HFSPLUS_HAS_FOLDER_COUNT flag set.
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*
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* Check for zero. Some subfolders may have been created
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* by an implementation ignorant of this counter.
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*/
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if (HFSPLUS_I(dir)->subfolders)
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HFSPLUS_I(dir)->subfolders--;
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}
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}
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int hfsplus_create_cat(u32 cnid, struct inode *dir,
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const struct qstr *str, struct inode *inode)
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{
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struct super_block *sb = dir->i_sb;
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struct hfs_find_data fd;
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hfsplus_cat_entry entry;
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int entry_size;
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int err;
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hfs_dbg(CAT_MOD, "create_cat: %s,%u(%d)\n",
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str->name, cnid, inode->i_nlink);
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err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
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if (err)
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return err;
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hfsplus_cat_build_key_with_cnid(sb, fd.search_key, cnid);
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entry_size = hfsplus_fill_cat_thread(sb, &entry,
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S_ISDIR(inode->i_mode) ?
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HFSPLUS_FOLDER_THREAD : HFSPLUS_FILE_THREAD,
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dir->i_ino, str);
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if (unlikely(entry_size < 0)) {
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err = entry_size;
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goto err2;
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}
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err = hfs_brec_find(&fd, hfs_find_rec_by_key);
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if (err != -ENOENT) {
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if (!err)
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err = -EEXIST;
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goto err2;
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}
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err = hfs_brec_insert(&fd, &entry, entry_size);
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if (err)
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goto err2;
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err = hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str);
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if (unlikely(err))
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goto err1;
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entry_size = hfsplus_cat_build_record(&entry, cnid, inode);
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err = hfs_brec_find(&fd, hfs_find_rec_by_key);
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if (err != -ENOENT) {
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/* panic? */
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if (!err)
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err = -EEXIST;
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goto err1;
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}
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err = hfs_brec_insert(&fd, &entry, entry_size);
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if (err)
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goto err1;
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dir->i_size++;
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if (S_ISDIR(inode->i_mode))
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hfsplus_subfolders_inc(dir);
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dir->i_mtime = dir->i_ctime = current_time(dir);
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hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY);
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hfs_find_exit(&fd);
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return 0;
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err1:
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hfsplus_cat_build_key_with_cnid(sb, fd.search_key, cnid);
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if (!hfs_brec_find(&fd, hfs_find_rec_by_key))
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hfs_brec_remove(&fd);
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err2:
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hfs_find_exit(&fd);
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return err;
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}
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int hfsplus_delete_cat(u32 cnid, struct inode *dir, const struct qstr *str)
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{
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struct super_block *sb = dir->i_sb;
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struct hfs_find_data fd;
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struct hfsplus_fork_raw fork;
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struct list_head *pos;
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int err, off;
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u16 type;
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hfs_dbg(CAT_MOD, "delete_cat: %s,%u\n", str ? str->name : NULL, cnid);
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err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd);
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if (err)
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return err;
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if (!str) {
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int len;
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hfsplus_cat_build_key_with_cnid(sb, fd.search_key, cnid);
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err = hfs_brec_find(&fd, hfs_find_rec_by_key);
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if (err)
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goto out;
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off = fd.entryoffset +
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offsetof(struct hfsplus_cat_thread, nodeName);
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fd.search_key->cat.parent = cpu_to_be32(dir->i_ino);
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hfs_bnode_read(fd.bnode,
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&fd.search_key->cat.name.length, off, 2);
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len = be16_to_cpu(fd.search_key->cat.name.length) * 2;
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hfs_bnode_read(fd.bnode,
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&fd.search_key->cat.name.unicode,
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off + 2, len);
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fd.search_key->key_len = cpu_to_be16(6 + len);
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} else {
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err = hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str);
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if (unlikely(err))
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goto out;
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}
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err = hfs_brec_find(&fd, hfs_find_rec_by_key);
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if (err)
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goto out;
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type = hfs_bnode_read_u16(fd.bnode, fd.entryoffset);
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if (type == HFSPLUS_FILE) {
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#if 0
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off = fd.entryoffset + offsetof(hfsplus_cat_file, data_fork);
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hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork));
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hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_DATA);
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#endif
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off = fd.entryoffset +
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offsetof(struct hfsplus_cat_file, rsrc_fork);
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hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork));
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hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_RSRC);
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}
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/* we only need to take spinlock for exclusion with ->release() */
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spin_lock(&HFSPLUS_I(dir)->open_dir_lock);
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list_for_each(pos, &HFSPLUS_I(dir)->open_dir_list) {
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struct hfsplus_readdir_data *rd =
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list_entry(pos, struct hfsplus_readdir_data, list);
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if (fd.tree->keycmp(fd.search_key, (void *)&rd->key) < 0)
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rd->file->f_pos--;
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}
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spin_unlock(&HFSPLUS_I(dir)->open_dir_lock);
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err = hfs_brec_remove(&fd);
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if (err)
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goto out;
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hfsplus_cat_build_key_with_cnid(sb, fd.search_key, cnid);
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err = hfs_brec_find(&fd, hfs_find_rec_by_key);
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if (err)
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goto out;
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err = hfs_brec_remove(&fd);
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if (err)
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goto out;
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dir->i_size--;
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if (type == HFSPLUS_FOLDER)
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hfsplus_subfolders_dec(dir);
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dir->i_mtime = dir->i_ctime = current_time(dir);
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hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY);
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if (type == HFSPLUS_FILE || type == HFSPLUS_FOLDER) {
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if (HFSPLUS_SB(sb)->attr_tree)
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hfsplus_delete_all_attrs(dir, cnid);
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}
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out:
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hfs_find_exit(&fd);
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return err;
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}
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int hfsplus_rename_cat(u32 cnid,
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struct inode *src_dir, const struct qstr *src_name,
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struct inode *dst_dir, const struct qstr *dst_name)
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{
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struct super_block *sb = src_dir->i_sb;
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struct hfs_find_data src_fd, dst_fd;
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hfsplus_cat_entry entry;
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int entry_size, type;
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int err;
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hfs_dbg(CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n",
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cnid, src_dir->i_ino, src_name->name,
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dst_dir->i_ino, dst_name->name);
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err = hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &src_fd);
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if (err)
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return err;
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dst_fd = src_fd;
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/* find the old dir entry and read the data */
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err = hfsplus_cat_build_key(sb, src_fd.search_key,
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src_dir->i_ino, src_name);
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if (unlikely(err))
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goto out;
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err = hfs_brec_find(&src_fd, hfs_find_rec_by_key);
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if (err)
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goto out;
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if (src_fd.entrylength > sizeof(entry) || src_fd.entrylength < 0) {
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err = -EIO;
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goto out;
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}
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|
|
hfs_bnode_read(src_fd.bnode, &entry, src_fd.entryoffset,
|
|
src_fd.entrylength);
|
|
type = be16_to_cpu(entry.type);
|
|
|
|
/* create new dir entry with the data from the old entry */
|
|
err = hfsplus_cat_build_key(sb, dst_fd.search_key,
|
|
dst_dir->i_ino, dst_name);
|
|
if (unlikely(err))
|
|
goto out;
|
|
|
|
err = hfs_brec_find(&dst_fd, hfs_find_rec_by_key);
|
|
if (err != -ENOENT) {
|
|
if (!err)
|
|
err = -EEXIST;
|
|
goto out;
|
|
}
|
|
|
|
err = hfs_brec_insert(&dst_fd, &entry, src_fd.entrylength);
|
|
if (err)
|
|
goto out;
|
|
dst_dir->i_size++;
|
|
if (type == HFSPLUS_FOLDER)
|
|
hfsplus_subfolders_inc(dst_dir);
|
|
dst_dir->i_mtime = dst_dir->i_ctime = current_time(dst_dir);
|
|
|
|
/* finally remove the old entry */
|
|
err = hfsplus_cat_build_key(sb, src_fd.search_key,
|
|
src_dir->i_ino, src_name);
|
|
if (unlikely(err))
|
|
goto out;
|
|
|
|
err = hfs_brec_find(&src_fd, hfs_find_rec_by_key);
|
|
if (err)
|
|
goto out;
|
|
err = hfs_brec_remove(&src_fd);
|
|
if (err)
|
|
goto out;
|
|
src_dir->i_size--;
|
|
if (type == HFSPLUS_FOLDER)
|
|
hfsplus_subfolders_dec(src_dir);
|
|
src_dir->i_mtime = src_dir->i_ctime = current_time(src_dir);
|
|
|
|
/* remove old thread entry */
|
|
hfsplus_cat_build_key_with_cnid(sb, src_fd.search_key, cnid);
|
|
err = hfs_brec_find(&src_fd, hfs_find_rec_by_key);
|
|
if (err)
|
|
goto out;
|
|
type = hfs_bnode_read_u16(src_fd.bnode, src_fd.entryoffset);
|
|
err = hfs_brec_remove(&src_fd);
|
|
if (err)
|
|
goto out;
|
|
|
|
/* create new thread entry */
|
|
hfsplus_cat_build_key_with_cnid(sb, dst_fd.search_key, cnid);
|
|
entry_size = hfsplus_fill_cat_thread(sb, &entry, type,
|
|
dst_dir->i_ino, dst_name);
|
|
if (unlikely(entry_size < 0)) {
|
|
err = entry_size;
|
|
goto out;
|
|
}
|
|
|
|
err = hfs_brec_find(&dst_fd, hfs_find_rec_by_key);
|
|
if (err != -ENOENT) {
|
|
if (!err)
|
|
err = -EEXIST;
|
|
goto out;
|
|
}
|
|
err = hfs_brec_insert(&dst_fd, &entry, entry_size);
|
|
|
|
hfsplus_mark_inode_dirty(dst_dir, HFSPLUS_I_CAT_DIRTY);
|
|
hfsplus_mark_inode_dirty(src_dir, HFSPLUS_I_CAT_DIRTY);
|
|
out:
|
|
hfs_bnode_put(dst_fd.bnode);
|
|
hfs_find_exit(&src_fd);
|
|
return err;
|
|
}
|