| /* |
| * linux/fs/hfs/inode.c |
| * |
| * Copyright (C) 1995-1997 Paul H. Hargrove |
| * (C) 2003 Ardis Technologies <roman@ardistech.com> |
| * 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 <linux/pagemap.h> |
| #include <linux/mpage.h> |
| #include <linux/sched.h> |
| #include <linux/uio.h> |
| |
| #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 void hfs_write_failed(struct address_space *mapping, loff_t to) |
| { |
| struct inode *inode = mapping->host; |
| |
| if (to > inode->i_size) { |
| truncate_pagecache(inode, inode->i_size); |
| hfs_file_truncate(inode); |
| } |
| } |
| |
| 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)) |
| hfs_write_failed(mapping, pos + len); |
| |
| 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_SIZE) { |
| nidx = page->index >> (tree->node_size_shift - PAGE_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_SHIFT - tree->node_size_shift); |
| i = 1 << (PAGE_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(struct kiocb *iocb, struct iov_iter *iter) |
| { |
| struct file *file = iocb->ki_filp; |
| struct address_space *mapping = file->f_mapping; |
| struct inode *inode = mapping->host; |
| size_t count = iov_iter_count(iter); |
| ssize_t ret; |
| |
| ret = blockdev_direct_IO(iocb, inode, iter, hfs_get_block); |
| |
| /* |
| * In case of error extending write may have instantiated a few |
| * blocks outside i_size. Trim these off again. |
| */ |
| if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) { |
| loff_t isize = i_size_read(inode); |
| loff_t end = iocb->ki_pos + count; |
| |
| if (end > isize) |
| hfs_write_failed(mapping, end); |
| } |
| |
| 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, const 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); |
| spin_lock_init(&HFS_I(inode)->open_dir_lock); |
| 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); |
| hfs_mark_mdb_dirty(sb); |
| |
| return inode; |
| } |
| |
| void hfs_delete_inode(struct inode *inode) |
| { |
| struct super_block *sb = inode->i_sb; |
| |
| hfs_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); |
| hfs_mark_mdb_dirty(sb); |
| 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); |
| hfs_mark_mdb_dirty(sb); |
| } |
| |
| 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); |
| spin_lock_init(&HFS_I(inode)->open_dir_lock); |
| |
| /* 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; |
| int res; |
| |
| hfs_dbg(INODE, "hfs_write_inode: %lu\n", inode->i_ino); |
| res = hfs_ext_write_extent(inode); |
| if (res) |
| return res; |
| |
| 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, |
| unsigned int flags) |
| { |
| 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); |
| |
| res = hfs_find_init(HFS_SB(dir->i_sb)->cat_tree, &fd); |
| if (res) { |
| iput(inode); |
| return ERR_PTR(res); |
| } |
| 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_final(&inode->i_data); |
| clear_inode(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)) { |
| inode_lock(inode); |
| 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); |
| //} |
| inode_unlock(inode); |
| } |
| 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 = d_inode(dentry); |
| struct hfs_sb_info *hsb = HFS_SB(inode->i_sb); |
| int error; |
| |
| error = setattr_prepare(dentry, 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) && |
| (!uid_eq(attr->ia_uid, hsb->s_uid))) || |
| ((attr->ia_valid & ATTR_GID) && |
| (!gid_eq(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 = inode_newsize_ok(inode, attr->ia_size); |
| if (error) |
| return error; |
| |
| truncate_setsize(inode, attr->ia_size); |
| hfs_file_truncate(inode); |
| } |
| |
| 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; |
| inode_lock(inode); |
| |
| /* sync the inode to buffers */ |
| ret = write_inode_now(inode, 0); |
| |
| /* sync the superblock to buffers */ |
| sb = inode->i_sb; |
| flush_delayed_work(&HFS_SB(sb)->mdb_work); |
| /* .. finally sync the buffers to disk */ |
| err = sync_blockdev(sb->s_bdev); |
| if (!ret) |
| ret = err; |
| inode_unlock(inode); |
| return ret; |
| } |
| |
| static const struct file_operations hfs_file_operations = { |
| .llseek = generic_file_llseek, |
| .read_iter = generic_file_read_iter, |
| .write_iter = generic_file_write_iter, |
| .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, |
| .setattr = hfs_inode_setattr, |
| .setxattr = hfs_setxattr, |
| .getxattr = hfs_getxattr, |
| .listxattr = hfs_listxattr, |
| }; |