From 871480933a1c28f8a9fed4c4d34d06c439a7a422 Mon Sep 17 00:00:00 2001 From: Srikant Patnaik Date: Sun, 11 Jan 2015 12:28:04 +0530 Subject: Moved, renamed, and deleted files The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure. --- ANDROID_3.4.5/fs/hfs/inode.c | 682 ------------------------------------------- 1 file changed, 682 deletions(-) delete mode 100644 ANDROID_3.4.5/fs/hfs/inode.c (limited to 'ANDROID_3.4.5/fs/hfs/inode.c') diff --git a/ANDROID_3.4.5/fs/hfs/inode.c b/ANDROID_3.4.5/fs/hfs/inode.c deleted file mode 100644 index 737dbeb6..00000000 --- a/ANDROID_3.4.5/fs/hfs/inode.c +++ /dev/null @@ -1,682 +0,0 @@ -/* - * linux/fs/hfs/inode.c - * - * Copyright (C) 1995-1997 Paul H. Hargrove - * (C) 2003 Ardis Technologies - * This file may be distributed under the terms of the GNU General Public License. - * - * This file contains inode-related functions which do not depend on - * which scheme is being used to represent forks. - * - * Based on the minix file system code, (C) 1991, 1992 by Linus Torvalds - */ - -#include -#include -#include - -#include "hfs_fs.h" -#include "btree.h" - -static const struct file_operations hfs_file_operations; -static const struct inode_operations hfs_file_inode_operations; - -/*================ Variable-like macros ================*/ - -#define HFS_VALID_MODE_BITS (S_IFREG | S_IFDIR | S_IRWXUGO) - -static int hfs_writepage(struct page *page, struct writeback_control *wbc) -{ - return block_write_full_page(page, hfs_get_block, wbc); -} - -static int hfs_readpage(struct file *file, struct page *page) -{ - return block_read_full_page(page, hfs_get_block); -} - -static int hfs_write_begin(struct file *file, struct address_space *mapping, - loff_t pos, unsigned len, unsigned flags, - struct page **pagep, void **fsdata) -{ - int ret; - - *pagep = NULL; - ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata, - hfs_get_block, - &HFS_I(mapping->host)->phys_size); - if (unlikely(ret)) { - loff_t isize = mapping->host->i_size; - if (pos + len > isize) - vmtruncate(mapping->host, isize); - } - - return ret; -} - -static sector_t hfs_bmap(struct address_space *mapping, sector_t block) -{ - return generic_block_bmap(mapping, block, hfs_get_block); -} - -static int hfs_releasepage(struct page *page, gfp_t mask) -{ - struct inode *inode = page->mapping->host; - struct super_block *sb = inode->i_sb; - struct hfs_btree *tree; - struct hfs_bnode *node; - u32 nidx; - int i, res = 1; - - switch (inode->i_ino) { - case HFS_EXT_CNID: - tree = HFS_SB(sb)->ext_tree; - break; - case HFS_CAT_CNID: - tree = HFS_SB(sb)->cat_tree; - break; - default: - BUG(); - return 0; - } - - if (!tree) - return 0; - - if (tree->node_size >= PAGE_CACHE_SIZE) { - nidx = page->index >> (tree->node_size_shift - PAGE_CACHE_SHIFT); - spin_lock(&tree->hash_lock); - node = hfs_bnode_findhash(tree, nidx); - if (!node) - ; - else if (atomic_read(&node->refcnt)) - res = 0; - if (res && node) { - hfs_bnode_unhash(node); - hfs_bnode_free(node); - } - spin_unlock(&tree->hash_lock); - } else { - nidx = page->index << (PAGE_CACHE_SHIFT - tree->node_size_shift); - i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift); - spin_lock(&tree->hash_lock); - do { - node = hfs_bnode_findhash(tree, nidx++); - if (!node) - continue; - if (atomic_read(&node->refcnt)) { - res = 0; - break; - } - hfs_bnode_unhash(node); - hfs_bnode_free(node); - } while (--i && nidx < tree->node_count); - spin_unlock(&tree->hash_lock); - } - return res ? try_to_free_buffers(page) : 0; -} - -static ssize_t hfs_direct_IO(int rw, struct kiocb *iocb, - const struct iovec *iov, loff_t offset, unsigned long nr_segs) -{ - struct file *file = iocb->ki_filp; - struct inode *inode = file->f_path.dentry->d_inode->i_mapping->host; - ssize_t ret; - - ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs, - hfs_get_block); - - /* - * In case of error extending write may have instantiated a few - * blocks outside i_size. Trim these off again. - */ - if (unlikely((rw & WRITE) && ret < 0)) { - loff_t isize = i_size_read(inode); - loff_t end = offset + iov_length(iov, nr_segs); - - if (end > isize) - vmtruncate(inode, isize); - } - - return ret; -} - -static int hfs_writepages(struct address_space *mapping, - struct writeback_control *wbc) -{ - return mpage_writepages(mapping, wbc, hfs_get_block); -} - -const struct address_space_operations hfs_btree_aops = { - .readpage = hfs_readpage, - .writepage = hfs_writepage, - .write_begin = hfs_write_begin, - .write_end = generic_write_end, - .bmap = hfs_bmap, - .releasepage = hfs_releasepage, -}; - -const struct address_space_operations hfs_aops = { - .readpage = hfs_readpage, - .writepage = hfs_writepage, - .write_begin = hfs_write_begin, - .write_end = generic_write_end, - .bmap = hfs_bmap, - .direct_IO = hfs_direct_IO, - .writepages = hfs_writepages, -}; - -/* - * hfs_new_inode - */ -struct inode *hfs_new_inode(struct inode *dir, struct qstr *name, umode_t mode) -{ - struct super_block *sb = dir->i_sb; - struct inode *inode = new_inode(sb); - if (!inode) - return NULL; - - mutex_init(&HFS_I(inode)->extents_lock); - INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list); - hfs_cat_build_key(sb, (btree_key *)&HFS_I(inode)->cat_key, dir->i_ino, name); - inode->i_ino = HFS_SB(sb)->next_id++; - inode->i_mode = mode; - inode->i_uid = current_fsuid(); - inode->i_gid = current_fsgid(); - set_nlink(inode, 1); - inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC; - HFS_I(inode)->flags = 0; - HFS_I(inode)->rsrc_inode = NULL; - HFS_I(inode)->fs_blocks = 0; - if (S_ISDIR(mode)) { - inode->i_size = 2; - HFS_SB(sb)->folder_count++; - if (dir->i_ino == HFS_ROOT_CNID) - HFS_SB(sb)->root_dirs++; - inode->i_op = &hfs_dir_inode_operations; - inode->i_fop = &hfs_dir_operations; - inode->i_mode |= S_IRWXUGO; - inode->i_mode &= ~HFS_SB(inode->i_sb)->s_dir_umask; - } else if (S_ISREG(mode)) { - HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks; - HFS_SB(sb)->file_count++; - if (dir->i_ino == HFS_ROOT_CNID) - HFS_SB(sb)->root_files++; - inode->i_op = &hfs_file_inode_operations; - inode->i_fop = &hfs_file_operations; - inode->i_mapping->a_ops = &hfs_aops; - inode->i_mode |= S_IRUGO|S_IXUGO; - if (mode & S_IWUSR) - inode->i_mode |= S_IWUGO; - inode->i_mode &= ~HFS_SB(inode->i_sb)->s_file_umask; - HFS_I(inode)->phys_size = 0; - HFS_I(inode)->alloc_blocks = 0; - HFS_I(inode)->first_blocks = 0; - HFS_I(inode)->cached_start = 0; - HFS_I(inode)->cached_blocks = 0; - memset(HFS_I(inode)->first_extents, 0, sizeof(hfs_extent_rec)); - memset(HFS_I(inode)->cached_extents, 0, sizeof(hfs_extent_rec)); - } - insert_inode_hash(inode); - mark_inode_dirty(inode); - set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags); - sb->s_dirt = 1; - - return inode; -} - -void hfs_delete_inode(struct inode *inode) -{ - struct super_block *sb = inode->i_sb; - - dprint(DBG_INODE, "delete_inode: %lu\n", inode->i_ino); - if (S_ISDIR(inode->i_mode)) { - HFS_SB(sb)->folder_count--; - if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID)) - HFS_SB(sb)->root_dirs--; - set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags); - sb->s_dirt = 1; - return; - } - HFS_SB(sb)->file_count--; - if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID)) - HFS_SB(sb)->root_files--; - if (S_ISREG(inode->i_mode)) { - if (!inode->i_nlink) { - inode->i_size = 0; - hfs_file_truncate(inode); - } - } - set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags); - sb->s_dirt = 1; -} - -void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext, - __be32 __log_size, __be32 phys_size, u32 clump_size) -{ - struct super_block *sb = inode->i_sb; - u32 log_size = be32_to_cpu(__log_size); - u16 count; - int i; - - memcpy(HFS_I(inode)->first_extents, ext, sizeof(hfs_extent_rec)); - for (count = 0, i = 0; i < 3; i++) - count += be16_to_cpu(ext[i].count); - HFS_I(inode)->first_blocks = count; - - inode->i_size = HFS_I(inode)->phys_size = log_size; - HFS_I(inode)->fs_blocks = (log_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits; - inode_set_bytes(inode, HFS_I(inode)->fs_blocks << sb->s_blocksize_bits); - HFS_I(inode)->alloc_blocks = be32_to_cpu(phys_size) / - HFS_SB(sb)->alloc_blksz; - HFS_I(inode)->clump_blocks = clump_size / HFS_SB(sb)->alloc_blksz; - if (!HFS_I(inode)->clump_blocks) - HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks; -} - -struct hfs_iget_data { - struct hfs_cat_key *key; - hfs_cat_rec *rec; -}; - -static int hfs_test_inode(struct inode *inode, void *data) -{ - struct hfs_iget_data *idata = data; - hfs_cat_rec *rec; - - rec = idata->rec; - switch (rec->type) { - case HFS_CDR_DIR: - return inode->i_ino == be32_to_cpu(rec->dir.DirID); - case HFS_CDR_FIL: - return inode->i_ino == be32_to_cpu(rec->file.FlNum); - default: - BUG(); - return 1; - } -} - -/* - * hfs_read_inode - */ -static int hfs_read_inode(struct inode *inode, void *data) -{ - struct hfs_iget_data *idata = data; - struct hfs_sb_info *hsb = HFS_SB(inode->i_sb); - hfs_cat_rec *rec; - - HFS_I(inode)->flags = 0; - HFS_I(inode)->rsrc_inode = NULL; - mutex_init(&HFS_I(inode)->extents_lock); - INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list); - - /* Initialize the inode */ - inode->i_uid = hsb->s_uid; - inode->i_gid = hsb->s_gid; - set_nlink(inode, 1); - - if (idata->key) - HFS_I(inode)->cat_key = *idata->key; - else - HFS_I(inode)->flags |= HFS_FLG_RSRC; - HFS_I(inode)->tz_secondswest = sys_tz.tz_minuteswest * 60; - - rec = idata->rec; - switch (rec->type) { - case HFS_CDR_FIL: - if (!HFS_IS_RSRC(inode)) { - hfs_inode_read_fork(inode, rec->file.ExtRec, rec->file.LgLen, - rec->file.PyLen, be16_to_cpu(rec->file.ClpSize)); - } else { - hfs_inode_read_fork(inode, rec->file.RExtRec, rec->file.RLgLen, - rec->file.RPyLen, be16_to_cpu(rec->file.ClpSize)); - } - - inode->i_ino = be32_to_cpu(rec->file.FlNum); - inode->i_mode = S_IRUGO | S_IXUGO; - if (!(rec->file.Flags & HFS_FIL_LOCK)) - inode->i_mode |= S_IWUGO; - inode->i_mode &= ~hsb->s_file_umask; - inode->i_mode |= S_IFREG; - inode->i_ctime = inode->i_atime = inode->i_mtime = - hfs_m_to_utime(rec->file.MdDat); - inode->i_op = &hfs_file_inode_operations; - inode->i_fop = &hfs_file_operations; - inode->i_mapping->a_ops = &hfs_aops; - break; - case HFS_CDR_DIR: - inode->i_ino = be32_to_cpu(rec->dir.DirID); - inode->i_size = be16_to_cpu(rec->dir.Val) + 2; - HFS_I(inode)->fs_blocks = 0; - inode->i_mode = S_IFDIR | (S_IRWXUGO & ~hsb->s_dir_umask); - inode->i_ctime = inode->i_atime = inode->i_mtime = - hfs_m_to_utime(rec->dir.MdDat); - inode->i_op = &hfs_dir_inode_operations; - inode->i_fop = &hfs_dir_operations; - break; - default: - make_bad_inode(inode); - } - return 0; -} - -/* - * __hfs_iget() - * - * Given the MDB for a HFS filesystem, a 'key' and an 'entry' in - * the catalog B-tree and the 'type' of the desired file return the - * inode for that file/directory or NULL. Note that 'type' indicates - * whether we want the actual file or directory, or the corresponding - * metadata (AppleDouble header file or CAP metadata file). - */ -struct inode *hfs_iget(struct super_block *sb, struct hfs_cat_key *key, hfs_cat_rec *rec) -{ - struct hfs_iget_data data = { key, rec }; - struct inode *inode; - u32 cnid; - - switch (rec->type) { - case HFS_CDR_DIR: - cnid = be32_to_cpu(rec->dir.DirID); - break; - case HFS_CDR_FIL: - cnid = be32_to_cpu(rec->file.FlNum); - break; - default: - return NULL; - } - inode = iget5_locked(sb, cnid, hfs_test_inode, hfs_read_inode, &data); - if (inode && (inode->i_state & I_NEW)) - unlock_new_inode(inode); - return inode; -} - -void hfs_inode_write_fork(struct inode *inode, struct hfs_extent *ext, - __be32 *log_size, __be32 *phys_size) -{ - memcpy(ext, HFS_I(inode)->first_extents, sizeof(hfs_extent_rec)); - - if (log_size) - *log_size = cpu_to_be32(inode->i_size); - if (phys_size) - *phys_size = cpu_to_be32(HFS_I(inode)->alloc_blocks * - HFS_SB(inode->i_sb)->alloc_blksz); -} - -int hfs_write_inode(struct inode *inode, struct writeback_control *wbc) -{ - struct inode *main_inode = inode; - struct hfs_find_data fd; - hfs_cat_rec rec; - - dprint(DBG_INODE, "hfs_write_inode: %lu\n", inode->i_ino); - hfs_ext_write_extent(inode); - - if (inode->i_ino < HFS_FIRSTUSER_CNID) { - switch (inode->i_ino) { - case HFS_ROOT_CNID: - break; - case HFS_EXT_CNID: - hfs_btree_write(HFS_SB(inode->i_sb)->ext_tree); - return 0; - case HFS_CAT_CNID: - hfs_btree_write(HFS_SB(inode->i_sb)->cat_tree); - return 0; - default: - BUG(); - return -EIO; - } - } - - if (HFS_IS_RSRC(inode)) - main_inode = HFS_I(inode)->rsrc_inode; - - if (!main_inode->i_nlink) - return 0; - - if (hfs_find_init(HFS_SB(main_inode->i_sb)->cat_tree, &fd)) - /* panic? */ - return -EIO; - - fd.search_key->cat = HFS_I(main_inode)->cat_key; - if (hfs_brec_find(&fd)) - /* panic? */ - goto out; - - if (S_ISDIR(main_inode->i_mode)) { - if (fd.entrylength < sizeof(struct hfs_cat_dir)) - /* panic? */; - hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, - sizeof(struct hfs_cat_dir)); - if (rec.type != HFS_CDR_DIR || - be32_to_cpu(rec.dir.DirID) != inode->i_ino) { - } - - rec.dir.MdDat = hfs_u_to_mtime(inode->i_mtime); - rec.dir.Val = cpu_to_be16(inode->i_size - 2); - - hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, - sizeof(struct hfs_cat_dir)); - } else if (HFS_IS_RSRC(inode)) { - hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, - sizeof(struct hfs_cat_file)); - hfs_inode_write_fork(inode, rec.file.RExtRec, - &rec.file.RLgLen, &rec.file.RPyLen); - hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, - sizeof(struct hfs_cat_file)); - } else { - if (fd.entrylength < sizeof(struct hfs_cat_file)) - /* panic? */; - hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, - sizeof(struct hfs_cat_file)); - if (rec.type != HFS_CDR_FIL || - be32_to_cpu(rec.file.FlNum) != inode->i_ino) { - } - - if (inode->i_mode & S_IWUSR) - rec.file.Flags &= ~HFS_FIL_LOCK; - else - rec.file.Flags |= HFS_FIL_LOCK; - hfs_inode_write_fork(inode, rec.file.ExtRec, &rec.file.LgLen, &rec.file.PyLen); - rec.file.MdDat = hfs_u_to_mtime(inode->i_mtime); - - hfs_bnode_write(fd.bnode, &rec, fd.entryoffset, - sizeof(struct hfs_cat_file)); - } -out: - hfs_find_exit(&fd); - return 0; -} - -static struct dentry *hfs_file_lookup(struct inode *dir, struct dentry *dentry, - struct nameidata *nd) -{ - struct inode *inode = NULL; - hfs_cat_rec rec; - struct hfs_find_data fd; - int res; - - if (HFS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc")) - goto out; - - inode = HFS_I(dir)->rsrc_inode; - if (inode) - goto out; - - inode = new_inode(dir->i_sb); - if (!inode) - return ERR_PTR(-ENOMEM); - - hfs_find_init(HFS_SB(dir->i_sb)->cat_tree, &fd); - fd.search_key->cat = HFS_I(dir)->cat_key; - res = hfs_brec_read(&fd, &rec, sizeof(rec)); - if (!res) { - struct hfs_iget_data idata = { NULL, &rec }; - hfs_read_inode(inode, &idata); - } - hfs_find_exit(&fd); - if (res) { - iput(inode); - return ERR_PTR(res); - } - HFS_I(inode)->rsrc_inode = dir; - HFS_I(dir)->rsrc_inode = inode; - igrab(dir); - hlist_add_fake(&inode->i_hash); - mark_inode_dirty(inode); -out: - d_add(dentry, inode); - return NULL; -} - -void hfs_evict_inode(struct inode *inode) -{ - truncate_inode_pages(&inode->i_data, 0); - end_writeback(inode); - if (HFS_IS_RSRC(inode) && HFS_I(inode)->rsrc_inode) { - HFS_I(HFS_I(inode)->rsrc_inode)->rsrc_inode = NULL; - iput(HFS_I(inode)->rsrc_inode); - } -} - -static int hfs_file_open(struct inode *inode, struct file *file) -{ - if (HFS_IS_RSRC(inode)) - inode = HFS_I(inode)->rsrc_inode; - atomic_inc(&HFS_I(inode)->opencnt); - return 0; -} - -static int hfs_file_release(struct inode *inode, struct file *file) -{ - //struct super_block *sb = inode->i_sb; - - if (HFS_IS_RSRC(inode)) - inode = HFS_I(inode)->rsrc_inode; - if (atomic_dec_and_test(&HFS_I(inode)->opencnt)) { - mutex_lock(&inode->i_mutex); - hfs_file_truncate(inode); - //if (inode->i_flags & S_DEAD) { - // hfs_delete_cat(inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL); - // hfs_delete_inode(inode); - //} - mutex_unlock(&inode->i_mutex); - } - return 0; -} - -/* - * hfs_notify_change() - * - * Based very closely on fs/msdos/inode.c by Werner Almesberger - * - * This is the notify_change() field in the super_operations structure - * for HFS file systems. The purpose is to take that changes made to - * an inode and apply then in a filesystem-dependent manner. In this - * case the process has a few of tasks to do: - * 1) prevent changes to the i_uid and i_gid fields. - * 2) map file permissions to the closest allowable permissions - * 3) Since multiple Linux files can share the same on-disk inode under - * HFS (for instance the data and resource forks of a file) a change - * to permissions must be applied to all other in-core inodes which - * correspond to the same HFS file. - */ - -int hfs_inode_setattr(struct dentry *dentry, struct iattr * attr) -{ - struct inode *inode = dentry->d_inode; - struct hfs_sb_info *hsb = HFS_SB(inode->i_sb); - int error; - - error = inode_change_ok(inode, attr); /* basic permission checks */ - if (error) - return error; - - /* no uig/gid changes and limit which mode bits can be set */ - if (((attr->ia_valid & ATTR_UID) && - (attr->ia_uid != hsb->s_uid)) || - ((attr->ia_valid & ATTR_GID) && - (attr->ia_gid != hsb->s_gid)) || - ((attr->ia_valid & ATTR_MODE) && - ((S_ISDIR(inode->i_mode) && - (attr->ia_mode != inode->i_mode)) || - (attr->ia_mode & ~HFS_VALID_MODE_BITS)))) { - return hsb->s_quiet ? 0 : error; - } - - if (attr->ia_valid & ATTR_MODE) { - /* Only the 'w' bits can ever change and only all together. */ - if (attr->ia_mode & S_IWUSR) - attr->ia_mode = inode->i_mode | S_IWUGO; - else - attr->ia_mode = inode->i_mode & ~S_IWUGO; - attr->ia_mode &= S_ISDIR(inode->i_mode) ? ~hsb->s_dir_umask: ~hsb->s_file_umask; - } - - if ((attr->ia_valid & ATTR_SIZE) && - attr->ia_size != i_size_read(inode)) { - inode_dio_wait(inode); - - error = vmtruncate(inode, attr->ia_size); - if (error) - return error; - } - - setattr_copy(inode, attr); - mark_inode_dirty(inode); - return 0; -} - -static int hfs_file_fsync(struct file *filp, loff_t start, loff_t end, - int datasync) -{ - struct inode *inode = filp->f_mapping->host; - struct super_block * sb; - int ret, err; - - ret = filemap_write_and_wait_range(inode->i_mapping, start, end); - if (ret) - return ret; - mutex_lock(&inode->i_mutex); - - /* sync the inode to buffers */ - ret = write_inode_now(inode, 0); - - /* sync the superblock to buffers */ - sb = inode->i_sb; - if (sb->s_dirt) { - lock_super(sb); - sb->s_dirt = 0; - if (!(sb->s_flags & MS_RDONLY)) - hfs_mdb_commit(sb); - unlock_super(sb); - } - /* .. finally sync the buffers to disk */ - err = sync_blockdev(sb->s_bdev); - if (!ret) - ret = err; - mutex_unlock(&inode->i_mutex); - return ret; -} - -static const struct file_operations hfs_file_operations = { - .llseek = generic_file_llseek, - .read = do_sync_read, - .aio_read = generic_file_aio_read, - .write = do_sync_write, - .aio_write = generic_file_aio_write, - .mmap = generic_file_mmap, - .splice_read = generic_file_splice_read, - .fsync = hfs_file_fsync, - .open = hfs_file_open, - .release = hfs_file_release, -}; - -static const struct inode_operations hfs_file_inode_operations = { - .lookup = hfs_file_lookup, - .truncate = hfs_file_truncate, - .setattr = hfs_inode_setattr, - .setxattr = hfs_setxattr, - .getxattr = hfs_getxattr, - .listxattr = hfs_listxattr, -}; -- cgit