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- // 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 inline bool is_extension_exist(const unsigned char *s, const char *sub,
- bool tmp_ext)
- {
- size_t slen = strlen(s);
- size_t sublen = strlen(sub);
- int i;
- if (sublen == 1 && *sub == '*')
- return true;
- /*
- * filename format of multimedia file should be defined as:
- * "filename + '.' + extension + (optional: '.' + temp extension)".
- */
- if (slen < sublen + 2)
- return false;
- if (!tmp_ext) {
- /* file has no temp extension */
- if (s[slen - sublen - 1] != '.')
- return false;
- return !strncasecmp(s + slen - sublen, sub, sublen);
- }
- for (i = 1; i < slen - sublen; i++) {
- if (s[i] != '.')
- continue;
- if (!strncasecmp(s + i + 1, sub, sublen))
- return true;
- }
- return false;
- }
- 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 void set_compress_new_inode(struct f2fs_sb_info *sbi, struct inode *dir,
- struct inode *inode, const unsigned char *name)
- {
- __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
- unsigned char (*noext)[F2FS_EXTENSION_LEN] =
- F2FS_OPTION(sbi).noextensions;
- unsigned char (*ext)[F2FS_EXTENSION_LEN] = F2FS_OPTION(sbi).extensions;
- unsigned char ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
- unsigned char noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
- int i, cold_count, hot_count;
- if (!f2fs_sb_has_compression(sbi))
- return;
- if (S_ISDIR(inode->i_mode))
- goto inherit_comp;
- /* This name comes only from normal files. */
- if (!name)
- return;
- /* Don't compress hot files. */
- f2fs_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 = cold_count; i < cold_count + hot_count; i++)
- if (is_extension_exist(name, extlist[i], false))
- break;
- f2fs_up_read(&sbi->sb_lock);
- if (i < (cold_count + hot_count))
- return;
- /* Don't compress unallowed extension. */
- for (i = 0; i < noext_cnt; i++)
- if (is_extension_exist(name, noext[i], false))
- return;
- /* Compress wanting extension. */
- for (i = 0; i < ext_cnt; i++) {
- if (is_extension_exist(name, ext[i], false)) {
- set_compress_context(inode);
- return;
- }
- }
- inherit_comp:
- /* Inherit the {no-}compression flag in directory */
- if (F2FS_I(dir)->i_flags & F2FS_NOCOMP_FL) {
- F2FS_I(inode)->i_flags |= F2FS_NOCOMP_FL;
- f2fs_mark_inode_dirty_sync(inode, true);
- } else if (F2FS_I(dir)->i_flags & F2FS_COMPR_FL) {
- set_compress_context(inode);
- }
- }
- /*
- * Set file's temperature for hot/cold data separation
- */
- static 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;
- f2fs_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], true))
- break;
- f2fs_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);
- }
- static struct inode *f2fs_new_inode(struct user_namespace *mnt_userns,
- struct inode *dir, umode_t mode,
- const char *name)
- {
- struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
- nid_t ino;
- struct inode *inode;
- bool nid_free = false;
- bool encrypt = false;
- int xattr_size = 0;
- int err;
- inode = new_inode(dir->i_sb);
- if (!inode)
- return ERR_PTR(-ENOMEM);
- if (!f2fs_alloc_nid(sbi, &ino)) {
- err = -ENOSPC;
- goto fail;
- }
- nid_free = true;
- inode_init_owner(mnt_userns, 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 = get_random_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(mnt_userns,
- F2FS_DEF_PROJID);
- err = fscrypt_prepare_new_inode(dir, inode, &encrypt);
- if (err)
- goto fail_drop;
- err = f2fs_dquot_initialize(inode);
- if (err)
- goto fail_drop;
- set_inode_flag(inode, FI_NEW_INODE);
- if (encrypt)
- 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 (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_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);
- /* Check compression first. */
- set_compress_new_inode(sbi, dir, inode, name);
- /* Should enable inline_data after compression set */
- if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
- set_inode_flag(inode, FI_INLINE_DATA);
- if (name && !test_opt(sbi, DISABLE_EXT_IDENTIFY))
- set_file_temperature(sbi, inode, name);
- stat_inc_inline_xattr(inode);
- stat_inc_inline_inode(inode);
- stat_inc_inline_dir(inode);
- f2fs_set_inode_flags(inode);
- f2fs_init_extent_tree(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 int f2fs_create(struct user_namespace *mnt_userns, 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 = f2fs_dquot_initialize(dir);
- if (err)
- return err;
- inode = f2fs_new_inode(mnt_userns, dir, mode, dentry->d_name.name);
- if (IS_ERR(inode))
- return PTR_ERR(inode);
- 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 = f2fs_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 page *page;
- unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot_name, &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;
- }
- if (!S_ISDIR(dir->i_mode)) {
- f2fs_err(sbi, "inconsistent inode status, skip recovering inline_dots inode (ino:%lu, i_mode:%u, pino:%u)",
- dir->i_ino, dir->i_mode, pino);
- set_sbi_flag(sbi, SBI_NEED_FSCK);
- return -ENOTDIR;
- }
- err = f2fs_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 f2fs_filename fname;
- trace_f2fs_lookup_start(dir, dentry, flags);
- if (dentry->d_name.len > F2FS_NAME_LEN) {
- err = -ENAMETOOLONG;
- goto out;
- }
- err = f2fs_prepare_lookup(dir, dentry, &fname);
- generic_set_encrypted_ci_d_ops(dentry);
- if (err == -ENOENT)
- goto out_splice;
- if (err)
- goto out;
- de = __f2fs_find_entry(dir, &fname, &page);
- f2fs_free_filename(&fname);
- if (!de) {
- if (IS_ERR(page)) {
- err = PTR_ERR(page);
- goto out;
- }
- err = -ENOENT;
- 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:
- #if IS_ENABLED(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, !new ? -ENOENT : 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;
- trace_f2fs_unlink_enter(dir, dentry);
- if (unlikely(f2fs_cp_error(sbi))) {
- err = -EIO;
- goto fail;
- }
- err = f2fs_dquot_initialize(dir);
- if (err)
- goto fail;
- err = f2fs_dquot_initialize(inode);
- if (err)
- goto fail;
- 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);
- f2fs_unlock_op(sbi);
- #if IS_ENABLED(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
- 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 user_namespace *mnt_userns, 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 = f2fs_dquot_initialize(dir);
- if (err)
- return err;
- inode = f2fs_new_inode(mnt_userns, dir, S_IFLNK | S_IRWXUGO, NULL);
- 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)
- kfree(disk_link.name);
- return err;
- }
- static int f2fs_mkdir(struct user_namespace *mnt_userns, 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 = f2fs_dquot_initialize(dir);
- if (err)
- return err;
- inode = f2fs_new_inode(mnt_userns, dir, S_IFDIR | mode, NULL);
- 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;
- mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
- 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 user_namespace *mnt_userns, 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 = f2fs_dquot_initialize(dir);
- if (err)
- return err;
- inode = f2fs_new_inode(mnt_userns, dir, mode, NULL);
- 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 user_namespace *mnt_userns, struct inode *dir,
- struct file *file, umode_t mode, bool is_whiteout,
- struct inode **new_inode)
- {
- struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
- struct inode *inode;
- int err;
- err = f2fs_dquot_initialize(dir);
- if (err)
- return err;
- inode = f2fs_new_inode(mnt_userns, dir, mode, NULL);
- if (IS_ERR(inode))
- return PTR_ERR(inode);
- if (is_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 (is_whiteout) {
- f2fs_i_links_write(inode, false);
- spin_lock(&inode->i_lock);
- inode->i_state |= I_LINKABLE;
- spin_unlock(&inode->i_lock);
- } else {
- if (file)
- d_tmpfile(file, inode);
- else
- f2fs_i_links_write(inode, false);
- }
- /* link_count was changed by d_tmpfile as well. */
- f2fs_unlock_op(sbi);
- unlock_new_inode(inode);
- if (new_inode)
- *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 user_namespace *mnt_userns, struct inode *dir,
- struct file *file, umode_t mode)
- {
- 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 = __f2fs_tmpfile(mnt_userns, dir, file, mode, false, NULL);
- return finish_open_simple(file, err);
- }
- static int f2fs_create_whiteout(struct user_namespace *mnt_userns,
- struct inode *dir, struct inode **whiteout)
- {
- return __f2fs_tmpfile(mnt_userns, dir, NULL,
- S_IFCHR | WHITEOUT_MODE, true, whiteout);
- }
- int f2fs_get_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
- struct inode **new_inode)
- {
- return __f2fs_tmpfile(mnt_userns, dir, NULL, S_IFREG, false, new_inode);
- }
- static int f2fs_rename(struct user_namespace *mnt_userns, 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 = NULL;
- 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;
- 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 new_inode is null, the below renaming flow will
- * add a link in old_dir which can convert inline_dir.
- * After then, if we failed to get the entry due to other
- * reasons like ENOMEM, we had to remove the new entry.
- * Instead of adding such the error handling routine, let's
- * simply convert first here.
- */
- if (old_dir == new_dir && !new_inode) {
- err = f2fs_try_convert_inline_dir(old_dir, new_dentry);
- if (err)
- return err;
- }
- if (flags & RENAME_WHITEOUT) {
- err = f2fs_create_whiteout(mnt_userns, old_dir, &whiteout);
- if (err)
- return err;
- }
- err = f2fs_dquot_initialize(old_dir);
- if (err)
- goto out;
- err = f2fs_dquot_initialize(new_dir);
- if (err)
- goto out;
- if (new_inode) {
- err = f2fs_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_page = NULL;
- new_inode->i_ctime = current_time(new_inode);
- f2fs_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);
- f2fs_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);
- }
- f2fs_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);
- f2fs_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);
- old_page = 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);
- 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:
- 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 = f2fs_dquot_initialize(old_dir);
- if (err)
- goto out;
- err = f2fs_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);
- f2fs_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);
- f2fs_up_write(&F2FS_I(old_inode)->i_sem);
- old_dir->i_ctime = current_time(old_dir);
- if (old_nlink) {
- f2fs_down_write(&F2FS_I(old_dir)->i_sem);
- f2fs_i_links_write(old_dir, old_nlink > 0);
- f2fs_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);
- f2fs_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);
- f2fs_up_write(&F2FS_I(new_inode)->i_sem);
- new_dir->i_ctime = current_time(new_dir);
- if (new_nlink) {
- f2fs_down_write(&F2FS_I(new_dir)->i_sem);
- f2fs_i_links_write(new_dir, new_nlink > 0);
- f2fs_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 user_namespace *mnt_userns,
- 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(mnt_userns, 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(struct user_namespace *mnt_userns,
- const struct path *path,
- struct kstat *stat, u32 request_mask,
- unsigned int query_flags)
- {
- f2fs_getattr(mnt_userns, 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,
- .listxattr = f2fs_listxattr,
- };
- 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,
- .listxattr = f2fs_listxattr,
- .fiemap = f2fs_fiemap,
- .fileattr_get = f2fs_fileattr_get,
- .fileattr_set = f2fs_fileattr_set,
- };
- const struct inode_operations f2fs_symlink_inode_operations = {
- .get_link = f2fs_get_link,
- .getattr = f2fs_getattr,
- .setattr = f2fs_setattr,
- .listxattr = f2fs_listxattr,
- };
- const struct inode_operations f2fs_special_inode_operations = {
- .getattr = f2fs_getattr,
- .setattr = f2fs_setattr,
- .get_acl = f2fs_get_acl,
- .set_acl = f2fs_set_acl,
- .listxattr = f2fs_listxattr,
- };
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