mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-08 01:08:03 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
364
fs/hfs/catalog.c
Normal file
364
fs/hfs/catalog.c
Normal file
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@ -0,0 +1,364 @@
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/*
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* linux/fs/hfs/catalog.c
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*
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* Copyright (C) 1995-1997 Paul H. Hargrove
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* (C) 2003 Ardis Technologies <roman@ardistech.com>
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* This file may be distributed under the terms of the GNU General Public License.
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*
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* This file contains the functions related to the catalog B-tree.
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*
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* Cache code shamelessly stolen from
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* linux/fs/inode.c Copyright (C) 1991, 1992 Linus Torvalds
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* re-shamelessly stolen Copyright (C) 1997 Linus Torvalds
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*/
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#include "hfs_fs.h"
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#include "btree.h"
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/*
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* hfs_cat_build_key()
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*
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* Given the ID of the parent and the name build a search key.
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*/
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void hfs_cat_build_key(struct super_block *sb, btree_key *key, u32 parent, struct qstr *name)
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{
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key->cat.reserved = 0;
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key->cat.ParID = cpu_to_be32(parent);
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if (name) {
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hfs_asc2mac(sb, &key->cat.CName, name);
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key->key_len = 6 + key->cat.CName.len;
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} else {
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memset(&key->cat.CName, 0, sizeof(struct hfs_name));
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key->key_len = 6;
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}
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}
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static int hfs_cat_build_record(hfs_cat_rec *rec, u32 cnid, struct inode *inode)
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{
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__be32 mtime = hfs_mtime();
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memset(rec, 0, sizeof(*rec));
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if (S_ISDIR(inode->i_mode)) {
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rec->type = HFS_CDR_DIR;
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rec->dir.DirID = cpu_to_be32(cnid);
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rec->dir.CrDat = mtime;
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rec->dir.MdDat = mtime;
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rec->dir.BkDat = 0;
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rec->dir.UsrInfo.frView = cpu_to_be16(0xff);
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return sizeof(struct hfs_cat_dir);
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} else {
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/* init some fields for the file record */
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rec->type = HFS_CDR_FIL;
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rec->file.Flags = HFS_FIL_USED | HFS_FIL_THD;
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if (!(inode->i_mode & S_IWUSR))
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rec->file.Flags |= HFS_FIL_LOCK;
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rec->file.FlNum = cpu_to_be32(cnid);
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rec->file.CrDat = mtime;
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rec->file.MdDat = mtime;
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rec->file.BkDat = 0;
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rec->file.UsrWds.fdType = HFS_SB(inode->i_sb)->s_type;
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rec->file.UsrWds.fdCreator = HFS_SB(inode->i_sb)->s_creator;
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return sizeof(struct hfs_cat_file);
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}
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}
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static int hfs_cat_build_thread(struct super_block *sb,
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hfs_cat_rec *rec, int type,
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u32 parentid, struct qstr *name)
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{
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rec->type = type;
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memset(rec->thread.reserved, 0, sizeof(rec->thread.reserved));
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rec->thread.ParID = cpu_to_be32(parentid);
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hfs_asc2mac(sb, &rec->thread.CName, name);
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return sizeof(struct hfs_cat_thread);
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}
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/*
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* create_entry()
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*
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* Add a new file or directory to the catalog B-tree and
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* return a (struct hfs_cat_entry) for it in '*result'.
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*/
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int hfs_cat_create(u32 cnid, struct inode *dir, struct qstr *str, struct inode *inode)
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{
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struct hfs_find_data fd;
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struct super_block *sb;
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union hfs_cat_rec 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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if (dir->i_size >= HFS_MAX_VALENCE)
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return -ENOSPC;
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sb = dir->i_sb;
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err = hfs_find_init(HFS_SB(sb)->cat_tree, &fd);
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if (err)
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return err;
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hfs_cat_build_key(sb, fd.search_key, cnid, NULL);
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entry_size = hfs_cat_build_thread(sb, &entry, S_ISDIR(inode->i_mode) ?
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HFS_CDR_THD : HFS_CDR_FTH,
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dir->i_ino, str);
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err = hfs_brec_find(&fd);
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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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hfs_cat_build_key(sb, fd.search_key, dir->i_ino, str);
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entry_size = hfs_cat_build_record(&entry, cnid, inode);
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err = hfs_brec_find(&fd);
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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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dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
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mark_inode_dirty(dir);
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hfs_find_exit(&fd);
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return 0;
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err1:
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hfs_cat_build_key(sb, fd.search_key, cnid, NULL);
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if (!hfs_brec_find(&fd))
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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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/*
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* hfs_cat_compare()
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*
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* Description:
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* This is the comparison function used for the catalog B-tree. In
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* comparing catalog B-tree entries, the parent id is the most
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* significant field (compared as unsigned ints). The name field is
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* the least significant (compared in "Macintosh lexical order",
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* see hfs_strcmp() in string.c)
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* Input Variable(s):
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* struct hfs_cat_key *key1: pointer to the first key to compare
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* struct hfs_cat_key *key2: pointer to the second key to compare
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* Output Variable(s):
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* NONE
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* Returns:
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* int: negative if key1<key2, positive if key1>key2, and 0 if key1==key2
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* Preconditions:
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* key1 and key2 point to "valid" (struct hfs_cat_key)s.
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* Postconditions:
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* This function has no side-effects
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*/
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int hfs_cat_keycmp(const btree_key *key1, const btree_key *key2)
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{
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int retval;
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retval = be32_to_cpu(key1->cat.ParID) - be32_to_cpu(key2->cat.ParID);
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if (!retval)
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retval = hfs_strcmp(key1->cat.CName.name, key1->cat.CName.len,
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key2->cat.CName.name, key2->cat.CName.len);
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return retval;
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}
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/* Try to get a catalog entry for given catalog id */
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// move to read_super???
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int hfs_cat_find_brec(struct super_block *sb, u32 cnid,
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struct hfs_find_data *fd)
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{
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hfs_cat_rec rec;
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int res, len, type;
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hfs_cat_build_key(sb, fd->search_key, cnid, NULL);
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res = hfs_brec_read(fd, &rec, sizeof(rec));
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if (res)
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return res;
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type = rec.type;
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if (type != HFS_CDR_THD && type != HFS_CDR_FTH) {
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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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fd->search_key->cat.ParID = rec.thread.ParID;
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len = fd->search_key->cat.CName.len = rec.thread.CName.len;
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if (len > HFS_NAMELEN) {
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pr_err("bad catalog namelength\n");
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return -EIO;
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}
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memcpy(fd->search_key->cat.CName.name, rec.thread.CName.name, len);
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return hfs_brec_find(fd);
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}
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/*
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* hfs_cat_delete()
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*
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* Delete the indicated file or directory.
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* The associated thread is also removed unless ('with_thread'==0).
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*/
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int hfs_cat_delete(u32 cnid, struct inode *dir, struct qstr *str)
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{
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struct super_block *sb;
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struct hfs_find_data fd;
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struct list_head *pos;
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int res, type;
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hfs_dbg(CAT_MOD, "delete_cat: %s,%u\n", str ? str->name : NULL, cnid);
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sb = dir->i_sb;
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res = hfs_find_init(HFS_SB(sb)->cat_tree, &fd);
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if (res)
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return res;
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hfs_cat_build_key(sb, fd.search_key, dir->i_ino, str);
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res = hfs_brec_find(&fd);
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if (res)
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goto out;
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type = hfs_bnode_read_u8(fd.bnode, fd.entryoffset);
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if (type == HFS_CDR_FIL) {
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struct hfs_cat_file file;
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hfs_bnode_read(fd.bnode, &file, fd.entryoffset, sizeof(file));
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if (be32_to_cpu(file.FlNum) == cnid) {
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#if 0
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hfs_free_fork(sb, &file, HFS_FK_DATA);
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#endif
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hfs_free_fork(sb, &file, HFS_FK_RSRC);
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}
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}
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list_for_each(pos, &HFS_I(dir)->open_dir_list) {
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struct hfs_readdir_data *rd =
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list_entry(pos, struct hfs_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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res = hfs_brec_remove(&fd);
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if (res)
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goto out;
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hfs_cat_build_key(sb, fd.search_key, cnid, NULL);
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res = hfs_brec_find(&fd);
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if (!res) {
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res = hfs_brec_remove(&fd);
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if (res)
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goto out;
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}
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dir->i_size--;
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dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
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mark_inode_dirty(dir);
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res = 0;
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out:
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hfs_find_exit(&fd);
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return res;
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}
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/*
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* hfs_cat_move()
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*
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* Rename a file or directory, possibly to a new directory.
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* If the destination exists it is removed and a
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* (struct hfs_cat_entry) for it is returned in '*result'.
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*/
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int hfs_cat_move(u32 cnid, struct inode *src_dir, struct qstr *src_name,
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struct inode *dst_dir, struct qstr *dst_name)
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{
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struct super_block *sb;
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struct hfs_find_data src_fd, dst_fd;
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union hfs_cat_rec 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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sb = src_dir->i_sb;
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err = hfs_find_init(HFS_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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hfs_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name);
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err = hfs_brec_find(&src_fd);
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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,
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src_fd.entrylength);
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/* create new dir entry with the data from the old entry */
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hfs_cat_build_key(sb, dst_fd.search_key, dst_dir->i_ino, dst_name);
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err = hfs_brec_find(&dst_fd);
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if (err != -ENOENT) {
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if (!err)
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err = -EEXIST;
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goto out;
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}
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err = hfs_brec_insert(&dst_fd, &entry, src_fd.entrylength);
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if (err)
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goto out;
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dst_dir->i_size++;
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dst_dir->i_mtime = dst_dir->i_ctime = CURRENT_TIME_SEC;
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mark_inode_dirty(dst_dir);
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/* finally remove the old entry */
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hfs_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name);
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err = hfs_brec_find(&src_fd);
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if (err)
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goto out;
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err = hfs_brec_remove(&src_fd);
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if (err)
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goto out;
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src_dir->i_size--;
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src_dir->i_mtime = src_dir->i_ctime = CURRENT_TIME_SEC;
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mark_inode_dirty(src_dir);
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type = entry.type;
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if (type == HFS_CDR_FIL && !(entry.file.Flags & HFS_FIL_THD))
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goto out;
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/* remove old thread entry */
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hfs_cat_build_key(sb, src_fd.search_key, cnid, NULL);
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err = hfs_brec_find(&src_fd);
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if (err)
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goto out;
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err = hfs_brec_remove(&src_fd);
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if (err)
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goto out;
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/* create new thread entry */
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hfs_cat_build_key(sb, dst_fd.search_key, cnid, NULL);
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entry_size = hfs_cat_build_thread(sb, &entry, type == HFS_CDR_FIL ? HFS_CDR_FTH : HFS_CDR_THD,
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dst_dir->i_ino, dst_name);
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err = hfs_brec_find(&dst_fd);
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if (err != -ENOENT) {
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if (!err)
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err = -EEXIST;
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goto out;
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}
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err = hfs_brec_insert(&dst_fd, &entry, entry_size);
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out:
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hfs_bnode_put(dst_fd.bnode);
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hfs_find_exit(&src_fd);
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return err;
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}
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