[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/fs/f2fs/namei.c b/src/kernel/linux/v4.14/fs/f2fs/namei.c
new file mode 100644
index 0000000..fd0820f
--- /dev/null
+++ b/src/kernel/linux/v4.14/fs/f2fs/namei.c
@@ -0,0 +1,1249 @@
+/*
+ * fs/f2fs/namei.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/fs.h>
+#include <linux/f2fs_fs.h>
+#include <linux/pagemap.h>
+#include <linux/sched.h>
+#include <linux/ctype.h>
+#include <linux/dcache.h>
+#include <linux/namei.h>
+#include <linux/quotaops.h>
+
+#include "f2fs.h"
+#include "node.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 (!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 =
+ F2FS_I(inode)->i_crtime = current_time(inode);
+ inode->i_generation = sbi->s_next_generation++;
+
+ err = insert_inode_locked(inode);
+ if (err) {
+ err = -EINVAL;
+ goto fail;
+ }
+
+ if (f2fs_sb_has_project_quota(sbi->sb) &&
+ (F2FS_I(dir)->i_flags & FS_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;
+
+ err = dquot_alloc_inode(inode);
+ if (err)
+ goto fail_drop;
+
+ set_inode_flag(inode, FI_NEW_INODE);
+
+ /* If the directory encrypted, then we should encrypt the inode. */
+ if ((f2fs_encrypted_inode(dir) || DUMMY_ENCRYPTION_ENABLED(sbi)) &&
+ f2fs_may_encrypt(inode))
+ f2fs_set_encrypted_inode(inode);
+
+ if (f2fs_sb_has_extra_attr(sbi->sb)) {
+ 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->sb)) {
+ 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 |= FS_INDEX_FL;
+
+ if (F2FS_I(inode)->i_flags & FS_PROJINHERIT_FL)
+ set_inode_flag(inode, FI_PROJ_INHERIT);
+
+ 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 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]))
+ continue;
+ if (i < cold_count)
+ file_set_cold(inode);
+ else
+ file_set_hot(inode);
+ break;
+ }
+
+ up_read(&sbi->sb_lock);
+}
+
+int 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) {
+ strncpy(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);
+ strncpy(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;
+
+ 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);
+
+ 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:
+ 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;
+
+ 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_msg(sbi->sb, KERN_INFO,
+ "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_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_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));
+
+ trace_f2fs_lookup_start(dir, dentry, flags);
+
+ err = fscrypt_prepare_lookup(dir, dentry, flags);
+ if (err)
+ goto out;
+
+ if (dentry->d_name.len > F2FS_NAME_LEN) {
+ err = -ENAMETOOLONG;
+ goto out;
+ }
+
+ de = f2fs_find_entry(dir, &dentry->d_name, &page);
+ 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 (f2fs_encrypted_inode(dir) &&
+ (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
+ !fscrypt_has_permitted_context(dir, inode)) {
+ f2fs_msg(inode->i_sb, KERN_WARNING,
+ "Inconsistent encryption contexts: %lu/%lu",
+ dir->i_ino, inode->i_ino);
+ err = -EPERM;
+ goto out_iput;
+ }
+out_splice:
+ new = d_splice_alias(inode, dentry);
+ if (IS_ERR(new))
+ err = PTR_ERR(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 = 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_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;
+
+ 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_handle_failed_inode;
+ f2fs_unlock_op(sbi);
+ 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_handle_failed_inode:
+ 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 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);
+
+ 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);
+ 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;
+
+ 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);
+
+ 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:
+ 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 = 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.
+ */
+ add_orphan_inode(inode);
+ alloc_nid_done(sbi, inode->i_ino);
+
+ if (whiteout) {
+ f2fs_i_links_write(inode, false);
+ *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:
+ release_orphan_inode(sbi);
+out:
+ 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_encrypted_inode(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 = -ENOENT;
+
+ if (unlikely(f2fs_cp_error(sbi)))
+ return -EIO;
+
+ 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;
+
+ 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;
+ }
+
+ 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 (flags & RENAME_WHITEOUT) {
+ err = f2fs_create_whiteout(old_dir, &whiteout);
+ if (err)
+ goto out_dir;
+ }
+
+ if (new_inode) {
+
+ err = -ENOTEMPTY;
+ if (old_dir_entry && !f2fs_empty_dir(new_inode))
+ goto out_whiteout;
+
+ 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_whiteout;
+ }
+
+ f2fs_balance_fs(sbi, true);
+
+ f2fs_lock_op(sbi);
+
+ err = 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)
+ add_orphan_inode(new_inode);
+ else
+ 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_whiteout;
+ }
+
+ 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_whiteout;
+ }
+ }
+ }
+
+ 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) {
+ whiteout->i_state |= I_LINKABLE;
+ set_inode_flag(whiteout, FI_INC_LINK);
+ err = f2fs_add_link(old_dentry, whiteout);
+ if (err)
+ goto put_out_dir;
+ whiteout->i_state &= ~I_LINKABLE;
+ 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)
+ 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);
+ return 0;
+
+put_out_dir:
+ f2fs_unlock_op(sbi);
+ if (new_page)
+ f2fs_put_page(new_page, 0);
+out_whiteout:
+ if (whiteout)
+ iput(whiteout);
+out_dir:
+ if (old_dir_entry)
+ f2fs_put_page(old_dir_page, 0);
+out_old:
+ f2fs_put_page(old_page, 0);
+out:
+ 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 = -ENOENT;
+
+ if (unlikely(f2fs_cp_error(sbi)))
+ return -EIO;
+
+ 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;
+
+ 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) {
+ add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
+ 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);
+ 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;
+}
+
+const struct inode_operations f2fs_encrypted_symlink_inode_operations = {
+ .get_link = f2fs_encrypted_get_link,
+ .getattr = f2fs_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
+};
+
+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
+};