| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * fs/f2fs/namei.c |
| * |
| * Copyright (c) 2012 Samsung Electronics Co., Ltd. |
| * http://www.samsung.com/ |
| */ |
| #include <linux/fs.h> |
| #include <linux/f2fs_fs.h> |
| #include <linux/pagemap.h> |
| #include <linux/sched.h> |
| #include <linux/ctype.h> |
| #include <linux/random.h> |
| #include <linux/dcache.h> |
| #include <linux/namei.h> |
| #include <linux/quotaops.h> |
| |
| #include "f2fs.h" |
| #include "node.h" |
| #include "segment.h" |
| #include "xattr.h" |
| #include "acl.h" |
| #include <trace/events/f2fs.h> |
| |
| static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
| nid_t ino; |
| struct inode *inode; |
| bool nid_free = false; |
| int xattr_size = 0; |
| int err; |
| |
| inode = new_inode(dir->i_sb); |
| if (!inode) |
| return ERR_PTR(-ENOMEM); |
| |
| f2fs_lock_op(sbi); |
| if (!f2fs_alloc_nid(sbi, &ino)) { |
| f2fs_unlock_op(sbi); |
| err = -ENOSPC; |
| goto fail; |
| } |
| f2fs_unlock_op(sbi); |
| |
| nid_free = true; |
| |
| inode_init_owner(inode, dir, mode); |
| |
| inode->i_ino = ino; |
| inode->i_blocks = 0; |
| inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); |
| F2FS_I(inode)->i_crtime = inode->i_mtime; |
| inode->i_generation = prandom_u32(); |
| |
| if (S_ISDIR(inode->i_mode)) |
| F2FS_I(inode)->i_current_depth = 1; |
| |
| err = insert_inode_locked(inode); |
| if (err) { |
| err = -EINVAL; |
| goto fail; |
| } |
| |
| if (f2fs_sb_has_project_quota(sbi) && |
| (F2FS_I(dir)->i_flags & F2FS_PROJINHERIT_FL)) |
| F2FS_I(inode)->i_projid = F2FS_I(dir)->i_projid; |
| else |
| F2FS_I(inode)->i_projid = make_kprojid(&init_user_ns, |
| F2FS_DEF_PROJID); |
| |
| err = dquot_initialize(inode); |
| if (err) |
| goto fail_drop; |
| |
| set_inode_flag(inode, FI_NEW_INODE); |
| |
| /* If the directory encrypted, then we should encrypt the inode. */ |
| if ((IS_ENCRYPTED(dir) || DUMMY_ENCRYPTION_ENABLED(sbi)) && |
| f2fs_may_encrypt(inode)) |
| f2fs_set_encrypted_inode(inode); |
| |
| if (f2fs_sb_has_extra_attr(sbi)) { |
| set_inode_flag(inode, FI_EXTRA_ATTR); |
| F2FS_I(inode)->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE; |
| } |
| |
| if (test_opt(sbi, INLINE_XATTR)) |
| set_inode_flag(inode, FI_INLINE_XATTR); |
| |
| if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode)) |
| set_inode_flag(inode, FI_INLINE_DATA); |
| if (f2fs_may_inline_dentry(inode)) |
| set_inode_flag(inode, FI_INLINE_DENTRY); |
| |
| if (f2fs_sb_has_flexible_inline_xattr(sbi)) { |
| f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode)); |
| if (f2fs_has_inline_xattr(inode)) |
| xattr_size = F2FS_OPTION(sbi).inline_xattr_size; |
| /* Otherwise, will be 0 */ |
| } else if (f2fs_has_inline_xattr(inode) || |
| f2fs_has_inline_dentry(inode)) { |
| xattr_size = DEFAULT_INLINE_XATTR_ADDRS; |
| } |
| F2FS_I(inode)->i_inline_xattr_size = xattr_size; |
| |
| f2fs_init_extent_tree(inode, NULL); |
| |
| stat_inc_inline_xattr(inode); |
| stat_inc_inline_inode(inode); |
| stat_inc_inline_dir(inode); |
| |
| F2FS_I(inode)->i_flags = |
| f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED); |
| |
| if (S_ISDIR(inode->i_mode)) |
| F2FS_I(inode)->i_flags |= F2FS_INDEX_FL; |
| |
| if (F2FS_I(inode)->i_flags & F2FS_PROJINHERIT_FL) |
| set_inode_flag(inode, FI_PROJ_INHERIT); |
| |
| f2fs_set_inode_flags(inode); |
| |
| trace_f2fs_new_inode(inode, 0); |
| return inode; |
| |
| fail: |
| trace_f2fs_new_inode(inode, err); |
| make_bad_inode(inode); |
| if (nid_free) |
| set_inode_flag(inode, FI_FREE_NID); |
| iput(inode); |
| return ERR_PTR(err); |
| fail_drop: |
| trace_f2fs_new_inode(inode, err); |
| dquot_drop(inode); |
| inode->i_flags |= S_NOQUOTA; |
| if (nid_free) |
| set_inode_flag(inode, FI_FREE_NID); |
| clear_nlink(inode); |
| unlock_new_inode(inode); |
| iput(inode); |
| return ERR_PTR(err); |
| } |
| |
| static inline int is_extension_exist(const unsigned char *s, const char *sub) |
| { |
| size_t slen = strlen(s); |
| size_t sublen = strlen(sub); |
| int i; |
| |
| /* |
| * filename format of multimedia file should be defined as: |
| * "filename + '.' + extension + (optional: '.' + temp extension)". |
| */ |
| if (slen < sublen + 2) |
| return 0; |
| |
| for (i = 1; i < slen - sublen; i++) { |
| if (s[i] != '.') |
| continue; |
| if (!strncasecmp(s + i + 1, sub, sublen)) |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Set multimedia files as cold files for hot/cold data separation |
| */ |
| static inline void set_file_temperature(struct f2fs_sb_info *sbi, struct inode *inode, |
| const unsigned char *name) |
| { |
| __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list; |
| int i, cold_count, hot_count; |
| |
| down_read(&sbi->sb_lock); |
| |
| cold_count = le32_to_cpu(sbi->raw_super->extension_count); |
| hot_count = sbi->raw_super->hot_ext_count; |
| |
| for (i = 0; i < cold_count + hot_count; i++) { |
| if (is_extension_exist(name, extlist[i])) |
| break; |
| } |
| |
| up_read(&sbi->sb_lock); |
| |
| if (i == cold_count + hot_count) |
| return; |
| |
| if (i < cold_count) |
| file_set_cold(inode); |
| else |
| file_set_hot(inode); |
| } |
| |
| int f2fs_update_extension_list(struct f2fs_sb_info *sbi, const char *name, |
| bool hot, bool set) |
| { |
| __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list; |
| int cold_count = le32_to_cpu(sbi->raw_super->extension_count); |
| int hot_count = sbi->raw_super->hot_ext_count; |
| int total_count = cold_count + hot_count; |
| int start, count; |
| int i; |
| |
| if (set) { |
| if (total_count == F2FS_MAX_EXTENSION) |
| return -EINVAL; |
| } else { |
| if (!hot && !cold_count) |
| return -EINVAL; |
| if (hot && !hot_count) |
| return -EINVAL; |
| } |
| |
| if (hot) { |
| start = cold_count; |
| count = total_count; |
| } else { |
| start = 0; |
| count = cold_count; |
| } |
| |
| for (i = start; i < count; i++) { |
| if (strcmp(name, extlist[i])) |
| continue; |
| |
| if (set) |
| return -EINVAL; |
| |
| memcpy(extlist[i], extlist[i + 1], |
| F2FS_EXTENSION_LEN * (total_count - i - 1)); |
| memset(extlist[total_count - 1], 0, F2FS_EXTENSION_LEN); |
| if (hot) |
| sbi->raw_super->hot_ext_count = hot_count - 1; |
| else |
| sbi->raw_super->extension_count = |
| cpu_to_le32(cold_count - 1); |
| return 0; |
| } |
| |
| if (!set) |
| return -EINVAL; |
| |
| if (hot) { |
| memcpy(extlist[count], name, strlen(name)); |
| sbi->raw_super->hot_ext_count = hot_count + 1; |
| } else { |
| char buf[F2FS_MAX_EXTENSION][F2FS_EXTENSION_LEN]; |
| |
| memcpy(buf, &extlist[cold_count], |
| F2FS_EXTENSION_LEN * hot_count); |
| memset(extlist[cold_count], 0, F2FS_EXTENSION_LEN); |
| memcpy(extlist[cold_count], name, strlen(name)); |
| memcpy(&extlist[cold_count + 1], buf, |
| F2FS_EXTENSION_LEN * hot_count); |
| sbi->raw_super->extension_count = cpu_to_le32(cold_count + 1); |
| } |
| return 0; |
| } |
| |
| static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, |
| bool excl) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
| struct inode *inode; |
| nid_t ino = 0; |
| int err; |
| |
| if (unlikely(f2fs_cp_error(sbi))) |
| return -EIO; |
| if (!f2fs_is_checkpoint_ready(sbi)) |
| return -ENOSPC; |
| |
| err = dquot_initialize(dir); |
| if (err) |
| return err; |
| |
| inode = f2fs_new_inode(dir, mode); |
| if (IS_ERR(inode)) |
| return PTR_ERR(inode); |
| |
| if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) |
| set_file_temperature(sbi, inode, dentry->d_name.name); |
| |
| inode->i_op = &f2fs_file_inode_operations; |
| inode->i_fop = &f2fs_file_operations; |
| inode->i_mapping->a_ops = &f2fs_dblock_aops; |
| ino = inode->i_ino; |
| |
| f2fs_lock_op(sbi); |
| err = f2fs_add_link(dentry, inode); |
| if (err) |
| goto out; |
| f2fs_unlock_op(sbi); |
| |
| f2fs_alloc_nid_done(sbi, ino); |
| |
| d_instantiate_new(dentry, inode); |
| |
| if (IS_DIRSYNC(dir)) |
| f2fs_sync_fs(sbi->sb, 1); |
| |
| f2fs_balance_fs(sbi, true); |
| return 0; |
| out: |
| f2fs_handle_failed_inode(inode); |
| return err; |
| } |
| |
| static int f2fs_link(struct dentry *old_dentry, struct inode *dir, |
| struct dentry *dentry) |
| { |
| struct inode *inode = d_inode(old_dentry); |
| struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
| int err; |
| |
| if (unlikely(f2fs_cp_error(sbi))) |
| return -EIO; |
| if (!f2fs_is_checkpoint_ready(sbi)) |
| return -ENOSPC; |
| |
| err = fscrypt_prepare_link(old_dentry, dir, dentry); |
| if (err) |
| return err; |
| |
| if (is_inode_flag_set(dir, FI_PROJ_INHERIT) && |
| (!projid_eq(F2FS_I(dir)->i_projid, |
| F2FS_I(old_dentry->d_inode)->i_projid))) |
| return -EXDEV; |
| |
| err = dquot_initialize(dir); |
| if (err) |
| return err; |
| |
| f2fs_balance_fs(sbi, true); |
| |
| inode->i_ctime = current_time(inode); |
| ihold(inode); |
| |
| set_inode_flag(inode, FI_INC_LINK); |
| f2fs_lock_op(sbi); |
| err = f2fs_add_link(dentry, inode); |
| if (err) |
| goto out; |
| f2fs_unlock_op(sbi); |
| |
| d_instantiate(dentry, inode); |
| |
| if (IS_DIRSYNC(dir)) |
| f2fs_sync_fs(sbi->sb, 1); |
| return 0; |
| out: |
| clear_inode_flag(inode, FI_INC_LINK); |
| iput(inode); |
| f2fs_unlock_op(sbi); |
| return err; |
| } |
| |
| struct dentry *f2fs_get_parent(struct dentry *child) |
| { |
| struct qstr dotdot = QSTR_INIT("..", 2); |
| struct page *page; |
| unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page); |
| if (!ino) { |
| if (IS_ERR(page)) |
| return ERR_CAST(page); |
| return ERR_PTR(-ENOENT); |
| } |
| return d_obtain_alias(f2fs_iget(child->d_sb, ino)); |
| } |
| |
| static int __recover_dot_dentries(struct inode *dir, nid_t pino) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
| struct qstr dot = QSTR_INIT(".", 1); |
| struct qstr dotdot = QSTR_INIT("..", 2); |
| struct f2fs_dir_entry *de; |
| struct page *page; |
| int err = 0; |
| |
| if (f2fs_readonly(sbi->sb)) { |
| f2fs_info(sbi, "skip recovering inline_dots inode (ino:%lu, pino:%u) in readonly mountpoint", |
| dir->i_ino, pino); |
| return 0; |
| } |
| |
| err = dquot_initialize(dir); |
| if (err) |
| return err; |
| |
| f2fs_balance_fs(sbi, true); |
| |
| f2fs_lock_op(sbi); |
| |
| de = f2fs_find_entry(dir, &dot, &page); |
| if (de) { |
| f2fs_put_page(page, 0); |
| } else if (IS_ERR(page)) { |
| err = PTR_ERR(page); |
| goto out; |
| } else { |
| err = f2fs_do_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); |
| if (err) |
| goto out; |
| } |
| |
| de = f2fs_find_entry(dir, &dotdot, &page); |
| if (de) |
| f2fs_put_page(page, 0); |
| else if (IS_ERR(page)) |
| err = PTR_ERR(page); |
| else |
| err = f2fs_do_add_link(dir, &dotdot, NULL, pino, S_IFDIR); |
| out: |
| if (!err) |
| clear_inode_flag(dir, FI_INLINE_DOTS); |
| |
| f2fs_unlock_op(sbi); |
| return err; |
| } |
| |
| static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, |
| unsigned int flags) |
| { |
| struct inode *inode = NULL; |
| struct f2fs_dir_entry *de; |
| struct page *page; |
| struct dentry *new; |
| nid_t ino = -1; |
| int err = 0; |
| unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir)); |
| struct fscrypt_name fname; |
| |
| trace_f2fs_lookup_start(dir, dentry, flags); |
| |
| if (dentry->d_name.len > F2FS_NAME_LEN) { |
| err = -ENAMETOOLONG; |
| goto out; |
| } |
| |
| err = fscrypt_prepare_lookup(dir, dentry, &fname); |
| if (err == -ENOENT) |
| goto out_splice; |
| if (err) |
| goto out; |
| de = __f2fs_find_entry(dir, &fname, &page); |
| fscrypt_free_filename(&fname); |
| |
| if (!de) { |
| if (IS_ERR(page)) { |
| err = PTR_ERR(page); |
| goto out; |
| } |
| goto out_splice; |
| } |
| |
| ino = le32_to_cpu(de->ino); |
| f2fs_put_page(page, 0); |
| |
| inode = f2fs_iget(dir->i_sb, ino); |
| if (IS_ERR(inode)) { |
| err = PTR_ERR(inode); |
| goto out; |
| } |
| |
| if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) { |
| err = __recover_dot_dentries(dir, root_ino); |
| if (err) |
| goto out_iput; |
| } |
| |
| if (f2fs_has_inline_dots(inode)) { |
| err = __recover_dot_dentries(inode, dir->i_ino); |
| if (err) |
| goto out_iput; |
| } |
| if (IS_ENCRYPTED(dir) && |
| (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) && |
| !fscrypt_has_permitted_context(dir, inode)) { |
| f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %lu/%lu", |
| dir->i_ino, inode->i_ino); |
| err = -EPERM; |
| goto out_iput; |
| } |
| out_splice: |
| #ifdef CONFIG_UNICODE |
| if (!inode && IS_CASEFOLDED(dir)) { |
| /* Eventually we want to call d_add_ci(dentry, NULL) |
| * for negative dentries in the encoding case as |
| * well. For now, prevent the negative dentry |
| * from being cached. |
| */ |
| trace_f2fs_lookup_end(dir, dentry, ino, err); |
| return NULL; |
| } |
| #endif |
| new = d_splice_alias(inode, dentry); |
| err = PTR_ERR_OR_ZERO(new); |
| trace_f2fs_lookup_end(dir, dentry, ino, err); |
| return new; |
| out_iput: |
| iput(inode); |
| out: |
| trace_f2fs_lookup_end(dir, dentry, ino, err); |
| return ERR_PTR(err); |
| } |
| |
| static int f2fs_unlink(struct inode *dir, struct dentry *dentry) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
| struct inode *inode = d_inode(dentry); |
| struct f2fs_dir_entry *de; |
| struct page *page; |
| int err = -ENOENT; |
| |
| trace_f2fs_unlink_enter(dir, dentry); |
| |
| if (unlikely(f2fs_cp_error(sbi))) |
| return -EIO; |
| |
| err = dquot_initialize(dir); |
| if (err) |
| return err; |
| err = dquot_initialize(inode); |
| if (err) |
| return err; |
| |
| de = f2fs_find_entry(dir, &dentry->d_name, &page); |
| if (!de) { |
| if (IS_ERR(page)) |
| err = PTR_ERR(page); |
| goto fail; |
| } |
| |
| f2fs_balance_fs(sbi, true); |
| |
| f2fs_lock_op(sbi); |
| err = f2fs_acquire_orphan_inode(sbi); |
| if (err) { |
| f2fs_unlock_op(sbi); |
| f2fs_put_page(page, 0); |
| goto fail; |
| } |
| f2fs_delete_entry(de, page, dir, inode); |
| #ifdef CONFIG_UNICODE |
| /* VFS negative dentries are incompatible with Encoding and |
| * Case-insensitiveness. Eventually we'll want avoid |
| * invalidating the dentries here, alongside with returning the |
| * negative dentries at f2fs_lookup(), when it is better |
| * supported by the VFS for the CI case. |
| */ |
| if (IS_CASEFOLDED(dir)) |
| d_invalidate(dentry); |
| #endif |
| f2fs_unlock_op(sbi); |
| |
| if (IS_DIRSYNC(dir)) |
| f2fs_sync_fs(sbi->sb, 1); |
| fail: |
| trace_f2fs_unlink_exit(inode, err); |
| return err; |
| } |
| |
| static const char *f2fs_get_link(struct dentry *dentry, |
| struct inode *inode, |
| struct delayed_call *done) |
| { |
| const char *link = page_get_link(dentry, inode, done); |
| if (!IS_ERR(link) && !*link) { |
| /* this is broken symlink case */ |
| do_delayed_call(done); |
| clear_delayed_call(done); |
| link = ERR_PTR(-ENOENT); |
| } |
| return link; |
| } |
| |
| static int f2fs_symlink(struct inode *dir, struct dentry *dentry, |
| const char *symname) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
| struct inode *inode; |
| size_t len = strlen(symname); |
| struct fscrypt_str disk_link; |
| int err; |
| |
| if (unlikely(f2fs_cp_error(sbi))) |
| return -EIO; |
| if (!f2fs_is_checkpoint_ready(sbi)) |
| return -ENOSPC; |
| |
| err = fscrypt_prepare_symlink(dir, symname, len, dir->i_sb->s_blocksize, |
| &disk_link); |
| if (err) |
| return err; |
| |
| err = dquot_initialize(dir); |
| if (err) |
| return err; |
| |
| inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO); |
| if (IS_ERR(inode)) |
| return PTR_ERR(inode); |
| |
| if (IS_ENCRYPTED(inode)) |
| inode->i_op = &f2fs_encrypted_symlink_inode_operations; |
| else |
| inode->i_op = &f2fs_symlink_inode_operations; |
| inode_nohighmem(inode); |
| inode->i_mapping->a_ops = &f2fs_dblock_aops; |
| |
| f2fs_lock_op(sbi); |
| err = f2fs_add_link(dentry, inode); |
| if (err) |
| goto out_f2fs_handle_failed_inode; |
| f2fs_unlock_op(sbi); |
| f2fs_alloc_nid_done(sbi, inode->i_ino); |
| |
| err = fscrypt_encrypt_symlink(inode, symname, len, &disk_link); |
| if (err) |
| goto err_out; |
| |
| err = page_symlink(inode, disk_link.name, disk_link.len); |
| |
| err_out: |
| d_instantiate_new(dentry, inode); |
| |
| /* |
| * Let's flush symlink data in order to avoid broken symlink as much as |
| * possible. Nevertheless, fsyncing is the best way, but there is no |
| * way to get a file descriptor in order to flush that. |
| * |
| * Note that, it needs to do dir->fsync to make this recoverable. |
| * If the symlink path is stored into inline_data, there is no |
| * performance regression. |
| */ |
| if (!err) { |
| filemap_write_and_wait_range(inode->i_mapping, 0, |
| disk_link.len - 1); |
| |
| if (IS_DIRSYNC(dir)) |
| f2fs_sync_fs(sbi->sb, 1); |
| } else { |
| f2fs_unlink(dir, dentry); |
| } |
| |
| f2fs_balance_fs(sbi, true); |
| goto out_free_encrypted_link; |
| |
| out_f2fs_handle_failed_inode: |
| f2fs_handle_failed_inode(inode); |
| out_free_encrypted_link: |
| if (disk_link.name != (unsigned char *)symname) |
| kvfree(disk_link.name); |
| return err; |
| } |
| |
| static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
| struct inode *inode; |
| int err; |
| |
| if (unlikely(f2fs_cp_error(sbi))) |
| return -EIO; |
| |
| err = dquot_initialize(dir); |
| if (err) |
| return err; |
| |
| inode = f2fs_new_inode(dir, S_IFDIR | mode); |
| if (IS_ERR(inode)) |
| return PTR_ERR(inode); |
| |
| inode->i_op = &f2fs_dir_inode_operations; |
| inode->i_fop = &f2fs_dir_operations; |
| inode->i_mapping->a_ops = &f2fs_dblock_aops; |
| inode_nohighmem(inode); |
| |
| set_inode_flag(inode, FI_INC_LINK); |
| f2fs_lock_op(sbi); |
| err = f2fs_add_link(dentry, inode); |
| if (err) |
| goto out_fail; |
| f2fs_unlock_op(sbi); |
| |
| f2fs_alloc_nid_done(sbi, inode->i_ino); |
| |
| d_instantiate_new(dentry, inode); |
| |
| if (IS_DIRSYNC(dir)) |
| f2fs_sync_fs(sbi->sb, 1); |
| |
| f2fs_balance_fs(sbi, true); |
| return 0; |
| |
| out_fail: |
| clear_inode_flag(inode, FI_INC_LINK); |
| f2fs_handle_failed_inode(inode); |
| return err; |
| } |
| |
| static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) |
| { |
| struct inode *inode = d_inode(dentry); |
| if (f2fs_empty_dir(inode)) |
| return f2fs_unlink(dir, dentry); |
| return -ENOTEMPTY; |
| } |
| |
| static int f2fs_mknod(struct inode *dir, struct dentry *dentry, |
| umode_t mode, dev_t rdev) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
| struct inode *inode; |
| int err = 0; |
| |
| if (unlikely(f2fs_cp_error(sbi))) |
| return -EIO; |
| if (!f2fs_is_checkpoint_ready(sbi)) |
| return -ENOSPC; |
| |
| err = dquot_initialize(dir); |
| if (err) |
| return err; |
| |
| inode = f2fs_new_inode(dir, mode); |
| if (IS_ERR(inode)) |
| return PTR_ERR(inode); |
| |
| init_special_inode(inode, inode->i_mode, rdev); |
| inode->i_op = &f2fs_special_inode_operations; |
| |
| f2fs_lock_op(sbi); |
| err = f2fs_add_link(dentry, inode); |
| if (err) |
| goto out; |
| f2fs_unlock_op(sbi); |
| |
| f2fs_alloc_nid_done(sbi, inode->i_ino); |
| |
| d_instantiate_new(dentry, inode); |
| |
| if (IS_DIRSYNC(dir)) |
| f2fs_sync_fs(sbi->sb, 1); |
| |
| f2fs_balance_fs(sbi, true); |
| return 0; |
| out: |
| f2fs_handle_failed_inode(inode); |
| return err; |
| } |
| |
| static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry, |
| umode_t mode, struct inode **whiteout) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
| struct inode *inode; |
| int err; |
| |
| err = dquot_initialize(dir); |
| if (err) |
| return err; |
| |
| inode = f2fs_new_inode(dir, mode); |
| if (IS_ERR(inode)) |
| return PTR_ERR(inode); |
| |
| if (whiteout) { |
| init_special_inode(inode, inode->i_mode, WHITEOUT_DEV); |
| inode->i_op = &f2fs_special_inode_operations; |
| } else { |
| inode->i_op = &f2fs_file_inode_operations; |
| inode->i_fop = &f2fs_file_operations; |
| inode->i_mapping->a_ops = &f2fs_dblock_aops; |
| } |
| |
| f2fs_lock_op(sbi); |
| err = f2fs_acquire_orphan_inode(sbi); |
| if (err) |
| goto out; |
| |
| err = f2fs_do_tmpfile(inode, dir); |
| if (err) |
| goto release_out; |
| |
| /* |
| * add this non-linked tmpfile to orphan list, in this way we could |
| * remove all unused data of tmpfile after abnormal power-off. |
| */ |
| f2fs_add_orphan_inode(inode); |
| f2fs_alloc_nid_done(sbi, inode->i_ino); |
| |
| if (whiteout) { |
| f2fs_i_links_write(inode, false); |
| |
| spin_lock(&inode->i_lock); |
| inode->i_state |= I_LINKABLE; |
| spin_unlock(&inode->i_lock); |
| |
| *whiteout = inode; |
| } else { |
| d_tmpfile(dentry, inode); |
| } |
| /* link_count was changed by d_tmpfile as well. */ |
| f2fs_unlock_op(sbi); |
| unlock_new_inode(inode); |
| |
| f2fs_balance_fs(sbi, true); |
| return 0; |
| |
| release_out: |
| f2fs_release_orphan_inode(sbi); |
| out: |
| f2fs_handle_failed_inode(inode); |
| return err; |
| } |
| |
| static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(dir); |
| |
| if (unlikely(f2fs_cp_error(sbi))) |
| return -EIO; |
| if (!f2fs_is_checkpoint_ready(sbi)) |
| return -ENOSPC; |
| |
| if (IS_ENCRYPTED(dir) || DUMMY_ENCRYPTION_ENABLED(sbi)) { |
| int err = fscrypt_get_encryption_info(dir); |
| if (err) |
| return err; |
| } |
| |
| return __f2fs_tmpfile(dir, dentry, mode, NULL); |
| } |
| |
| static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout) |
| { |
| if (unlikely(f2fs_cp_error(F2FS_I_SB(dir)))) |
| return -EIO; |
| |
| return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout); |
| } |
| |
| static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, |
| struct inode *new_dir, struct dentry *new_dentry, |
| unsigned int flags) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
| struct inode *old_inode = d_inode(old_dentry); |
| struct inode *new_inode = d_inode(new_dentry); |
| struct inode *whiteout = NULL; |
| struct page *old_dir_page; |
| struct page *old_page, *new_page = NULL; |
| struct f2fs_dir_entry *old_dir_entry = NULL; |
| struct f2fs_dir_entry *old_entry; |
| struct f2fs_dir_entry *new_entry; |
| bool is_old_inline = f2fs_has_inline_dentry(old_dir); |
| int err; |
| |
| if (unlikely(f2fs_cp_error(sbi))) |
| return -EIO; |
| if (!f2fs_is_checkpoint_ready(sbi)) |
| return -ENOSPC; |
| |
| if (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && |
| (!projid_eq(F2FS_I(new_dir)->i_projid, |
| F2FS_I(old_dentry->d_inode)->i_projid))) |
| return -EXDEV; |
| |
| if (flags & RENAME_WHITEOUT) { |
| err = f2fs_create_whiteout(old_dir, &whiteout); |
| if (err) |
| return err; |
| } |
| |
| err = dquot_initialize(old_dir); |
| if (err) |
| goto out; |
| |
| err = dquot_initialize(new_dir); |
| if (err) |
| goto out; |
| |
| if (new_inode) { |
| err = dquot_initialize(new_inode); |
| if (err) |
| goto out; |
| } |
| |
| err = -ENOENT; |
| old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
| if (!old_entry) { |
| if (IS_ERR(old_page)) |
| err = PTR_ERR(old_page); |
| goto out; |
| } |
| |
| if (S_ISDIR(old_inode->i_mode)) { |
| old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page); |
| if (!old_dir_entry) { |
| if (IS_ERR(old_dir_page)) |
| err = PTR_ERR(old_dir_page); |
| goto out_old; |
| } |
| } |
| |
| if (new_inode) { |
| |
| err = -ENOTEMPTY; |
| if (old_dir_entry && !f2fs_empty_dir(new_inode)) |
| goto out_dir; |
| |
| err = -ENOENT; |
| new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, |
| &new_page); |
| if (!new_entry) { |
| if (IS_ERR(new_page)) |
| err = PTR_ERR(new_page); |
| goto out_dir; |
| } |
| |
| f2fs_balance_fs(sbi, true); |
| |
| f2fs_lock_op(sbi); |
| |
| err = f2fs_acquire_orphan_inode(sbi); |
| if (err) |
| goto put_out_dir; |
| |
| f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
| |
| new_inode->i_ctime = current_time(new_inode); |
| down_write(&F2FS_I(new_inode)->i_sem); |
| if (old_dir_entry) |
| f2fs_i_links_write(new_inode, false); |
| f2fs_i_links_write(new_inode, false); |
| up_write(&F2FS_I(new_inode)->i_sem); |
| |
| if (!new_inode->i_nlink) |
| f2fs_add_orphan_inode(new_inode); |
| else |
| f2fs_release_orphan_inode(sbi); |
| } else { |
| f2fs_balance_fs(sbi, true); |
| |
| f2fs_lock_op(sbi); |
| |
| err = f2fs_add_link(new_dentry, old_inode); |
| if (err) { |
| f2fs_unlock_op(sbi); |
| goto out_dir; |
| } |
| |
| if (old_dir_entry) |
| f2fs_i_links_write(new_dir, true); |
| |
| /* |
| * old entry and new entry can locate in the same inline |
| * dentry in inode, when attaching new entry in inline dentry, |
| * it could force inline dentry conversion, after that, |
| * old_entry and old_page will point to wrong address, in |
| * order to avoid this, let's do the check and update here. |
| */ |
| if (is_old_inline && !f2fs_has_inline_dentry(old_dir)) { |
| f2fs_put_page(old_page, 0); |
| old_page = NULL; |
| |
| old_entry = f2fs_find_entry(old_dir, |
| &old_dentry->d_name, &old_page); |
| if (!old_entry) { |
| err = -ENOENT; |
| if (IS_ERR(old_page)) |
| err = PTR_ERR(old_page); |
| f2fs_unlock_op(sbi); |
| goto out_dir; |
| } |
| } |
| } |
| |
| down_write(&F2FS_I(old_inode)->i_sem); |
| if (!old_dir_entry || whiteout) |
| file_lost_pino(old_inode); |
| else |
| /* adjust dir's i_pino to pass fsck check */ |
| f2fs_i_pino_write(old_inode, new_dir->i_ino); |
| up_write(&F2FS_I(old_inode)->i_sem); |
| |
| old_inode->i_ctime = current_time(old_inode); |
| f2fs_mark_inode_dirty_sync(old_inode, false); |
| |
| f2fs_delete_entry(old_entry, old_page, old_dir, NULL); |
| |
| if (whiteout) { |
| set_inode_flag(whiteout, FI_INC_LINK); |
| err = f2fs_add_link(old_dentry, whiteout); |
| if (err) |
| goto put_out_dir; |
| |
| spin_lock(&whiteout->i_lock); |
| whiteout->i_state &= ~I_LINKABLE; |
| spin_unlock(&whiteout->i_lock); |
| |
| iput(whiteout); |
| } |
| |
| if (old_dir_entry) { |
| if (old_dir != new_dir && !whiteout) |
| f2fs_set_link(old_inode, old_dir_entry, |
| old_dir_page, new_dir); |
| else |
| f2fs_put_page(old_dir_page, 0); |
| f2fs_i_links_write(old_dir, false); |
| } |
| if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) { |
| f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO); |
| if (S_ISDIR(old_inode->i_mode)) |
| f2fs_add_ino_entry(sbi, old_inode->i_ino, |
| TRANS_DIR_INO); |
| } |
| |
| f2fs_unlock_op(sbi); |
| |
| if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) |
| f2fs_sync_fs(sbi->sb, 1); |
| |
| f2fs_update_time(sbi, REQ_TIME); |
| return 0; |
| |
| put_out_dir: |
| f2fs_unlock_op(sbi); |
| if (new_page) |
| f2fs_put_page(new_page, 0); |
| out_dir: |
| if (old_dir_entry) |
| f2fs_put_page(old_dir_page, 0); |
| out_old: |
| f2fs_put_page(old_page, 0); |
| out: |
| if (whiteout) |
| iput(whiteout); |
| return err; |
| } |
| |
| static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
| struct inode *new_dir, struct dentry *new_dentry) |
| { |
| struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); |
| struct inode *old_inode = d_inode(old_dentry); |
| struct inode *new_inode = d_inode(new_dentry); |
| struct page *old_dir_page, *new_dir_page; |
| struct page *old_page, *new_page; |
| struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; |
| struct f2fs_dir_entry *old_entry, *new_entry; |
| int old_nlink = 0, new_nlink = 0; |
| int err; |
| |
| if (unlikely(f2fs_cp_error(sbi))) |
| return -EIO; |
| if (!f2fs_is_checkpoint_ready(sbi)) |
| return -ENOSPC; |
| |
| if ((is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && |
| !projid_eq(F2FS_I(new_dir)->i_projid, |
| F2FS_I(old_dentry->d_inode)->i_projid)) || |
| (is_inode_flag_set(new_dir, FI_PROJ_INHERIT) && |
| !projid_eq(F2FS_I(old_dir)->i_projid, |
| F2FS_I(new_dentry->d_inode)->i_projid))) |
| return -EXDEV; |
| |
| err = dquot_initialize(old_dir); |
| if (err) |
| goto out; |
| |
| err = dquot_initialize(new_dir); |
| if (err) |
| goto out; |
| |
| err = -ENOENT; |
| old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); |
| if (!old_entry) { |
| if (IS_ERR(old_page)) |
| err = PTR_ERR(old_page); |
| goto out; |
| } |
| |
| new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); |
| if (!new_entry) { |
| if (IS_ERR(new_page)) |
| err = PTR_ERR(new_page); |
| goto out_old; |
| } |
| |
| /* prepare for updating ".." directory entry info later */ |
| if (old_dir != new_dir) { |
| if (S_ISDIR(old_inode->i_mode)) { |
| old_dir_entry = f2fs_parent_dir(old_inode, |
| &old_dir_page); |
| if (!old_dir_entry) { |
| if (IS_ERR(old_dir_page)) |
| err = PTR_ERR(old_dir_page); |
| goto out_new; |
| } |
| } |
| |
| if (S_ISDIR(new_inode->i_mode)) { |
| new_dir_entry = f2fs_parent_dir(new_inode, |
| &new_dir_page); |
| if (!new_dir_entry) { |
| if (IS_ERR(new_dir_page)) |
| err = PTR_ERR(new_dir_page); |
| goto out_old_dir; |
| } |
| } |
| } |
| |
| /* |
| * If cross rename between file and directory those are not |
| * in the same directory, we will inc nlink of file's parent |
| * later, so we should check upper boundary of its nlink. |
| */ |
| if ((!old_dir_entry || !new_dir_entry) && |
| old_dir_entry != new_dir_entry) { |
| old_nlink = old_dir_entry ? -1 : 1; |
| new_nlink = -old_nlink; |
| err = -EMLINK; |
| if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) || |
| (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX)) |
| goto out_new_dir; |
| } |
| |
| f2fs_balance_fs(sbi, true); |
| |
| f2fs_lock_op(sbi); |
| |
| /* update ".." directory entry info of old dentry */ |
| if (old_dir_entry) |
| f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); |
| |
| /* update ".." directory entry info of new dentry */ |
| if (new_dir_entry) |
| f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); |
| |
| /* update directory entry info of old dir inode */ |
| f2fs_set_link(old_dir, old_entry, old_page, new_inode); |
| |
| down_write(&F2FS_I(old_inode)->i_sem); |
| if (!old_dir_entry) |
| file_lost_pino(old_inode); |
| else |
| /* adjust dir's i_pino to pass fsck check */ |
| f2fs_i_pino_write(old_inode, new_dir->i_ino); |
| up_write(&F2FS_I(old_inode)->i_sem); |
| |
| old_dir->i_ctime = current_time(old_dir); |
| if (old_nlink) { |
| down_write(&F2FS_I(old_dir)->i_sem); |
| f2fs_i_links_write(old_dir, old_nlink > 0); |
| up_write(&F2FS_I(old_dir)->i_sem); |
| } |
| f2fs_mark_inode_dirty_sync(old_dir, false); |
| |
| /* update directory entry info of new dir inode */ |
| f2fs_set_link(new_dir, new_entry, new_page, old_inode); |
| |
| down_write(&F2FS_I(new_inode)->i_sem); |
| if (!new_dir_entry) |
| file_lost_pino(new_inode); |
| else |
| /* adjust dir's i_pino to pass fsck check */ |
| f2fs_i_pino_write(new_inode, old_dir->i_ino); |
| up_write(&F2FS_I(new_inode)->i_sem); |
| |
| new_dir->i_ctime = current_time(new_dir); |
| if (new_nlink) { |
| down_write(&F2FS_I(new_dir)->i_sem); |
| f2fs_i_links_write(new_dir, new_nlink > 0); |
| up_write(&F2FS_I(new_dir)->i_sem); |
| } |
| f2fs_mark_inode_dirty_sync(new_dir, false); |
| |
| if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) { |
| f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO); |
| f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO); |
| } |
| |
| f2fs_unlock_op(sbi); |
| |
| if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) |
| f2fs_sync_fs(sbi->sb, 1); |
| |
| f2fs_update_time(sbi, REQ_TIME); |
| return 0; |
| out_new_dir: |
| if (new_dir_entry) { |
| f2fs_put_page(new_dir_page, 0); |
| } |
| out_old_dir: |
| if (old_dir_entry) { |
| f2fs_put_page(old_dir_page, 0); |
| } |
| out_new: |
| f2fs_put_page(new_page, 0); |
| out_old: |
| f2fs_put_page(old_page, 0); |
| out: |
| return err; |
| } |
| |
| static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, |
| struct inode *new_dir, struct dentry *new_dentry, |
| unsigned int flags) |
| { |
| int err; |
| |
| if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
| return -EINVAL; |
| |
| err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry, |
| flags); |
| if (err) |
| return err; |
| |
| if (flags & RENAME_EXCHANGE) { |
| return f2fs_cross_rename(old_dir, old_dentry, |
| new_dir, new_dentry); |
| } |
| /* |
| * VFS has already handled the new dentry existence case, |
| * here, we just deal with "RENAME_NOREPLACE" as regular rename. |
| */ |
| return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags); |
| } |
| |
| static const char *f2fs_encrypted_get_link(struct dentry *dentry, |
| struct inode *inode, |
| struct delayed_call *done) |
| { |
| struct page *page; |
| const char *target; |
| |
| if (!dentry) |
| return ERR_PTR(-ECHILD); |
| |
| page = read_mapping_page(inode->i_mapping, 0, NULL); |
| if (IS_ERR(page)) |
| return ERR_CAST(page); |
| |
| target = fscrypt_get_symlink(inode, page_address(page), |
| inode->i_sb->s_blocksize, done); |
| put_page(page); |
| return target; |
| } |
| |
| static int f2fs_encrypted_symlink_getattr(const struct path *path, |
| struct kstat *stat, u32 request_mask, |
| unsigned int query_flags) |
| { |
| f2fs_getattr(path, stat, request_mask, query_flags); |
| |
| return fscrypt_symlink_getattr(path, stat); |
| } |
| |
| const struct inode_operations f2fs_encrypted_symlink_inode_operations = { |
| .get_link = f2fs_encrypted_get_link, |
| .getattr = f2fs_encrypted_symlink_getattr, |
| .setattr = f2fs_setattr, |
| #ifdef CONFIG_F2FS_FS_XATTR |
| .listxattr = f2fs_listxattr, |
| #endif |
| }; |
| |
| const struct inode_operations f2fs_dir_inode_operations = { |
| .create = f2fs_create, |
| .lookup = f2fs_lookup, |
| .link = f2fs_link, |
| .unlink = f2fs_unlink, |
| .symlink = f2fs_symlink, |
| .mkdir = f2fs_mkdir, |
| .rmdir = f2fs_rmdir, |
| .mknod = f2fs_mknod, |
| .rename = f2fs_rename2, |
| .tmpfile = f2fs_tmpfile, |
| .getattr = f2fs_getattr, |
| .setattr = f2fs_setattr, |
| .get_acl = f2fs_get_acl, |
| .set_acl = f2fs_set_acl, |
| #ifdef CONFIG_F2FS_FS_XATTR |
| .listxattr = f2fs_listxattr, |
| #endif |
| .fiemap = f2fs_fiemap, |
| }; |
| |
| const struct inode_operations f2fs_symlink_inode_operations = { |
| .get_link = f2fs_get_link, |
| .getattr = f2fs_getattr, |
| .setattr = f2fs_setattr, |
| #ifdef CONFIG_F2FS_FS_XATTR |
| .listxattr = f2fs_listxattr, |
| #endif |
| }; |
| |
| const struct inode_operations f2fs_special_inode_operations = { |
| .getattr = f2fs_getattr, |
| .setattr = f2fs_setattr, |
| .get_acl = f2fs_get_acl, |
| .set_acl = f2fs_set_acl, |
| #ifdef CONFIG_F2FS_FS_XATTR |
| .listxattr = f2fs_listxattr, |
| #endif |
| }; |