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-rw-r--r--kernel/fs/f2fs/namei.c832
1 files changed, 832 insertions, 0 deletions
diff --git a/kernel/fs/f2fs/namei.c b/kernel/fs/f2fs/namei.c
new file mode 100644
index 000000000..658e8079a
--- /dev/null
+++ b/kernel/fs/f2fs/namei.c
@@ -0,0 +1,832 @@
+/*
+ * 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 "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 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);
+
+ 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->i_generation = sbi->s_next_generation++;
+
+ err = insert_inode_locked(inode);
+ if (err) {
+ err = -EINVAL;
+ nid_free = true;
+ goto out;
+ }
+
+ if (f2fs_may_inline(inode))
+ set_inode_flag(F2FS_I(inode), FI_INLINE_DATA);
+ if (test_opt(sbi, INLINE_DENTRY) && S_ISDIR(inode->i_mode))
+ set_inode_flag(F2FS_I(inode), FI_INLINE_DENTRY);
+
+ trace_f2fs_new_inode(inode, 0);
+ mark_inode_dirty(inode);
+ return inode;
+
+out:
+ clear_nlink(inode);
+ unlock_new_inode(inode);
+fail:
+ trace_f2fs_new_inode(inode, err);
+ make_bad_inode(inode);
+ iput(inode);
+ if (nid_free)
+ alloc_nid_failed(sbi, ino);
+ return ERR_PTR(err);
+}
+
+static int is_multimedia_file(const unsigned char *s, const char *sub)
+{
+ size_t slen = strlen(s);
+ size_t sublen = strlen(sub);
+
+ if (sublen > slen)
+ return 0;
+
+ return !strncasecmp(s + slen - sublen, sub, sublen);
+}
+
+/*
+ * Set multimedia files as cold files for hot/cold data separation
+ */
+static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode,
+ const unsigned char *name)
+{
+ int i;
+ __u8 (*extlist)[8] = sbi->raw_super->extension_list;
+
+ int count = le32_to_cpu(sbi->raw_super->extension_count);
+ for (i = 0; i < count; i++) {
+ if (is_multimedia_file(name, extlist[i])) {
+ file_set_cold(inode);
+ break;
+ }
+ }
+}
+
+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;
+
+ f2fs_balance_fs(sbi);
+
+ inode = f2fs_new_inode(dir, mode);
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+
+ if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
+ set_cold_files(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);
+
+ stat_inc_inline_inode(inode);
+ d_instantiate(dentry, inode);
+ unlock_new_inode(inode);
+
+ if (IS_DIRSYNC(dir))
+ f2fs_sync_fs(sbi->sb, 1);
+ 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;
+
+ f2fs_balance_fs(sbi);
+
+ inode->i_ctime = CURRENT_TIME;
+ ihold(inode);
+
+ set_inode_flag(F2FS_I(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(F2FS_I(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);
+ unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot);
+ if (!ino)
+ return ERR_PTR(-ENOENT);
+ return d_obtain_alias(f2fs_iget(d_inode(child)->i_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;
+
+ f2fs_lock_op(sbi);
+
+ de = f2fs_find_entry(dir, &dot, &page);
+ if (de) {
+ f2fs_dentry_kunmap(dir, page);
+ f2fs_put_page(page, 0);
+ } 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_dentry_kunmap(dir, page);
+ f2fs_put_page(page, 0);
+ } else {
+ err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR);
+ }
+out:
+ if (!err) {
+ clear_inode_flag(F2FS_I(dir), FI_INLINE_DOTS);
+ mark_inode_dirty(dir);
+ }
+
+ 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;
+
+ if (dentry->d_name.len > F2FS_NAME_LEN)
+ return ERR_PTR(-ENAMETOOLONG);
+
+ de = f2fs_find_entry(dir, &dentry->d_name, &page);
+ if (de) {
+ nid_t ino = le32_to_cpu(de->ino);
+ f2fs_dentry_kunmap(dir, page);
+ f2fs_put_page(page, 0);
+
+ inode = f2fs_iget(dir->i_sb, ino);
+ if (IS_ERR(inode))
+ return ERR_CAST(inode);
+
+ if (f2fs_has_inline_dots(inode)) {
+ int err;
+
+ err = __recover_dot_dentries(inode, dir->i_ino);
+ if (err) {
+ iget_failed(inode);
+ return ERR_PTR(err);
+ }
+ }
+ }
+
+ return d_splice_alias(inode, dentry);
+}
+
+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);
+ f2fs_balance_fs(sbi);
+
+ de = f2fs_find_entry(dir, &dentry->d_name, &page);
+ if (!de)
+ goto fail;
+
+ f2fs_lock_op(sbi);
+ err = acquire_orphan_inode(sbi);
+ if (err) {
+ f2fs_unlock_op(sbi);
+ f2fs_dentry_kunmap(dir, page);
+ f2fs_put_page(page, 0);
+ goto fail;
+ }
+ f2fs_delete_entry(de, page, dir, inode);
+ f2fs_unlock_op(sbi);
+
+ /* In order to evict this inode, we set it dirty */
+ mark_inode_dirty(inode);
+
+ if (IS_DIRSYNC(dir))
+ f2fs_sync_fs(sbi->sb, 1);
+fail:
+ trace_f2fs_unlink_exit(inode, err);
+ return err;
+}
+
+static void *f2fs_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+ struct page *page = page_follow_link_light(dentry, nd);
+
+ if (IS_ERR_OR_NULL(page))
+ return page;
+
+ /* this is broken symlink case */
+ if (*nd_get_link(nd) == 0) {
+ page_put_link(dentry, nd, page);
+ return ERR_PTR(-ENOENT);
+ }
+ return page;
+}
+
+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 symlen = strlen(symname) + 1;
+ int err;
+
+ f2fs_balance_fs(sbi);
+
+ inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+
+ inode->i_op = &f2fs_symlink_inode_operations;
+ inode->i_mapping->a_ops = &f2fs_dblock_aops;
+
+ f2fs_lock_op(sbi);
+ err = f2fs_add_link(dentry, inode);
+ if (err)
+ goto out;
+ f2fs_unlock_op(sbi);
+
+ err = page_symlink(inode, symname, symlen);
+ alloc_nid_done(sbi, inode->i_ino);
+
+ d_instantiate(dentry, inode);
+ unlock_new_inode(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.
+ */
+ filemap_write_and_wait_range(inode->i_mapping, 0, symlen - 1);
+
+ if (IS_DIRSYNC(dir))
+ f2fs_sync_fs(sbi->sb, 1);
+ return err;
+out:
+ handle_failed_inode(inode);
+ 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;
+
+ f2fs_balance_fs(sbi);
+
+ 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;
+ mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
+
+ set_inode_flag(F2FS_I(inode), FI_INC_LINK);
+ f2fs_lock_op(sbi);
+ err = f2fs_add_link(dentry, inode);
+ if (err)
+ goto out_fail;
+ f2fs_unlock_op(sbi);
+
+ stat_inc_inline_dir(inode);
+ alloc_nid_done(sbi, inode->i_ino);
+
+ d_instantiate(dentry, inode);
+ unlock_new_inode(inode);
+
+ if (IS_DIRSYNC(dir))
+ f2fs_sync_fs(sbi->sb, 1);
+ return 0;
+
+out_fail:
+ clear_inode_flag(F2FS_I(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 (!new_valid_dev(rdev))
+ return -EINVAL;
+
+ f2fs_balance_fs(sbi);
+
+ 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(dentry, inode);
+ unlock_new_inode(inode);
+
+ if (IS_DIRSYNC(dir))
+ f2fs_sync_fs(sbi->sb, 1);
+ return 0;
+out:
+ handle_failed_inode(inode);
+ return err;
+}
+
+static int f2fs_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;
+ struct page *old_page, *new_page;
+ struct f2fs_dir_entry *old_dir_entry = NULL;
+ struct f2fs_dir_entry *old_entry;
+ struct f2fs_dir_entry *new_entry;
+ int err = -ENOENT;
+
+ f2fs_balance_fs(sbi);
+
+ old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
+ if (!old_entry)
+ goto out;
+
+ if (S_ISDIR(old_inode->i_mode)) {
+ err = -EIO;
+ old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
+ if (!old_dir_entry)
+ 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)
+ goto out_dir;
+
+ f2fs_lock_op(sbi);
+
+ err = acquire_orphan_inode(sbi);
+ if (err)
+ goto put_out_dir;
+
+ if (update_dent_inode(old_inode, &new_dentry->d_name)) {
+ release_orphan_inode(sbi);
+ goto put_out_dir;
+ }
+
+ f2fs_set_link(new_dir, new_entry, new_page, old_inode);
+
+ new_inode->i_ctime = CURRENT_TIME;
+ down_write(&F2FS_I(new_inode)->i_sem);
+ if (old_dir_entry)
+ drop_nlink(new_inode);
+ drop_nlink(new_inode);
+ up_write(&F2FS_I(new_inode)->i_sem);
+
+ mark_inode_dirty(new_inode);
+
+ if (!new_inode->i_nlink)
+ add_orphan_inode(sbi, new_inode->i_ino);
+ else
+ release_orphan_inode(sbi);
+
+ update_inode_page(old_inode);
+ update_inode_page(new_inode);
+ } else {
+ 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) {
+ inc_nlink(new_dir);
+ update_inode_page(new_dir);
+ }
+ }
+
+ down_write(&F2FS_I(old_inode)->i_sem);
+ file_lost_pino(old_inode);
+ up_write(&F2FS_I(old_inode)->i_sem);
+
+ old_inode->i_ctime = CURRENT_TIME;
+ mark_inode_dirty(old_inode);
+
+ f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
+
+ if (old_dir_entry) {
+ if (old_dir != new_dir) {
+ f2fs_set_link(old_inode, old_dir_entry,
+ old_dir_page, new_dir);
+ update_inode_page(old_inode);
+ } else {
+ f2fs_dentry_kunmap(old_inode, old_dir_page);
+ f2fs_put_page(old_dir_page, 0);
+ }
+ drop_nlink(old_dir);
+ mark_inode_dirty(old_dir);
+ update_inode_page(old_dir);
+ }
+
+ 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);
+ f2fs_dentry_kunmap(new_dir, new_page);
+ f2fs_put_page(new_page, 0);
+out_dir:
+ if (old_dir_entry) {
+ f2fs_dentry_kunmap(old_inode, old_dir_page);
+ f2fs_put_page(old_dir_page, 0);
+ }
+out_old:
+ f2fs_dentry_kunmap(old_dir, old_page);
+ 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;
+
+ f2fs_balance_fs(sbi);
+
+ old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
+ if (!old_entry)
+ goto out;
+
+ new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
+ if (!new_entry)
+ goto out_old;
+
+ /* prepare for updating ".." directory entry info later */
+ if (old_dir != new_dir) {
+ if (S_ISDIR(old_inode->i_mode)) {
+ err = -EIO;
+ old_dir_entry = f2fs_parent_dir(old_inode,
+ &old_dir_page);
+ if (!old_dir_entry)
+ goto out_new;
+ }
+
+ if (S_ISDIR(new_inode->i_mode)) {
+ err = -EIO;
+ new_dir_entry = f2fs_parent_dir(new_inode,
+ &new_dir_page);
+ if (!new_dir_entry)
+ 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_inode->i_nlink >= F2FS_LINK_MAX) ||
+ (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX))
+ goto out_new_dir;
+ }
+
+ f2fs_lock_op(sbi);
+
+ err = update_dent_inode(old_inode, &new_dentry->d_name);
+ if (err)
+ goto out_unlock;
+
+ err = update_dent_inode(new_inode, &old_dentry->d_name);
+ if (err)
+ goto out_undo;
+
+ /* 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);
+ file_lost_pino(old_inode);
+ up_write(&F2FS_I(old_inode)->i_sem);
+
+ update_inode_page(old_inode);
+
+ old_dir->i_ctime = CURRENT_TIME;
+ if (old_nlink) {
+ down_write(&F2FS_I(old_dir)->i_sem);
+ if (old_nlink < 0)
+ drop_nlink(old_dir);
+ else
+ inc_nlink(old_dir);
+ up_write(&F2FS_I(old_dir)->i_sem);
+ }
+ mark_inode_dirty(old_dir);
+ update_inode_page(old_dir);
+
+ /* 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);
+ file_lost_pino(new_inode);
+ up_write(&F2FS_I(new_inode)->i_sem);
+
+ update_inode_page(new_inode);
+
+ new_dir->i_ctime = CURRENT_TIME;
+ if (new_nlink) {
+ down_write(&F2FS_I(new_dir)->i_sem);
+ if (new_nlink < 0)
+ drop_nlink(new_dir);
+ else
+ inc_nlink(new_dir);
+ up_write(&F2FS_I(new_dir)->i_sem);
+ }
+ mark_inode_dirty(new_dir);
+ update_inode_page(new_dir);
+
+ f2fs_unlock_op(sbi);
+
+ if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
+ f2fs_sync_fs(sbi->sb, 1);
+ return 0;
+out_undo:
+ /* Still we may fail to recover name info of f2fs_inode here */
+ update_dent_inode(old_inode, &old_dentry->d_name);
+out_unlock:
+ f2fs_unlock_op(sbi);
+out_new_dir:
+ if (new_dir_entry) {
+ f2fs_dentry_kunmap(new_inode, new_dir_page);
+ f2fs_put_page(new_dir_page, 0);
+ }
+out_old_dir:
+ if (old_dir_entry) {
+ f2fs_dentry_kunmap(old_inode, old_dir_page);
+ f2fs_put_page(old_dir_page, 0);
+ }
+out_new:
+ f2fs_dentry_kunmap(new_dir, new_page);
+ f2fs_put_page(new_page, 0);
+out_old:
+ f2fs_dentry_kunmap(old_dir, old_page);
+ 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)
+{
+ if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE))
+ return -EINVAL;
+
+ 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);
+}
+
+static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
+ struct inode *inode;
+ int err;
+
+ inode = f2fs_new_inode(dir, mode);
+ 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;
+
+ 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(sbi, inode->i_ino);
+ f2fs_unlock_op(sbi);
+
+ alloc_nid_done(sbi, inode->i_ino);
+
+ stat_inc_inline_inode(inode);
+ d_tmpfile(dentry, inode);
+ unlock_new_inode(inode);
+ return 0;
+
+release_out:
+ release_orphan_inode(sbi);
+out:
+ handle_failed_inode(inode);
+ return err;
+}
+
+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,
+ .rename2 = 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
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
+ .listxattr = f2fs_listxattr,
+ .removexattr = generic_removexattr,
+#endif
+};
+
+const struct inode_operations f2fs_symlink_inode_operations = {
+ .readlink = generic_readlink,
+ .follow_link = f2fs_follow_link,
+ .put_link = page_put_link,
+ .getattr = f2fs_getattr,
+ .setattr = f2fs_setattr,
+#ifdef CONFIG_F2FS_FS_XATTR
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
+ .listxattr = f2fs_listxattr,
+ .removexattr = generic_removexattr,
+#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
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
+ .listxattr = f2fs_listxattr,
+ .removexattr = generic_removexattr,
+#endif
+};