This adds inode operations for directory, symlink, and special inodes. Signed-off-by: Changman Lee <cm224.lee@xxxxxxxxxxx> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@xxxxxxxxxxx> --- fs/f2fs/namei.c | 494 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 494 insertions(+) create mode 100644 fs/f2fs/namei.c diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c new file mode 100644 index 0000000..899d144 --- /dev/null +++ b/fs/f2fs/namei.c @@ -0,0 +1,494 @@ +/** + * 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 "f2fs.h" +#include "xattr.h" +#include "acl.h" + +static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode) +{ + struct super_block *sb = dir->i_sb; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + nid_t ino; + struct inode *inode; + bool nid_free = false; + int err; + + inode = new_inode(sb); + if (!inode) + return ERR_PTR(-ENOMEM); + + mutex_lock_op(sbi, NODE_NEW); + if (!alloc_nid(sbi, &ino)) { + mutex_unlock_op(sbi, NODE_NEW); + err = -ENOSPC; + goto fail; + } + mutex_unlock_op(sbi, NODE_NEW); + + inode->i_uid = current_fsuid(); + + if (dir->i_mode & S_ISGID) { + inode->i_gid = dir->i_gid; + if (S_ISDIR(mode)) + mode |= S_ISGID; + } else { + inode->i_gid = current_fsgid(); + } + + inode->i_ino = ino; + inode->i_mode = mode; + inode->i_blocks = 0; + inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; + + err = insert_inode_locked(inode); + if (err) { + err = -EINVAL; + nid_free = true; + goto out; + } + + mark_inode_dirty(inode); + return inode; + +out: + clear_nlink(inode); + unlock_new_inode(inode); +fail: + 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) +{ + int slen = strlen(s); + int sublen = strlen(sub); + int ret; + + if (sublen > slen) + return 1; + + ret = memcmp(s + slen - sublen, sub, sublen); + if (ret) { /* compare upper case */ + int i; + char upper_sub[8]; + for (i = 0; i < sublen && i < sizeof(upper_sub); i++) + upper_sub[i] = toupper(sub[i]); + return memcmp(s + slen - sublen, upper_sub, sublen); + } + + return ret; +} + +/** + * Set multimedia files as cold files for hot/cold data separation + */ +static inline void set_cold_file(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])) { + F2FS_I(inode)->i_advise |= FADVISE_COLD_BIT; + break; + } + } +} + +static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, + bool excl) +{ + struct super_block *sb = dir->i_sb; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct inode *inode; + nid_t ino = 0; + int err; + + inode = f2fs_new_inode(dir, mode); + if (IS_ERR(inode)) + return PTR_ERR(inode); + + if (!test_opt(sbi, DISABLE_EXT_IDENTIFY)) + set_cold_file(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; + + err = f2fs_add_link(dentry, inode); + if (err) + goto out; + + alloc_nid_done(sbi, ino); + + if (!sbi->por_doing) + d_instantiate(dentry, inode); + unlock_new_inode(inode); + + f2fs_balance_fs(sbi); + return 0; +out: + clear_nlink(inode); + unlock_new_inode(inode); + iput(inode); + alloc_nid_failed(sbi, ino); + return err; +} + +static int f2fs_link(struct dentry *old_dentry, struct inode *dir, + struct dentry *dentry) +{ + struct inode *inode = old_dentry->d_inode; + struct super_block *sb = dir->i_sb; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + int err; + + inode->i_ctime = CURRENT_TIME; + atomic_inc(&inode->i_count); + + set_inode_flag(F2FS_I(inode), FI_INC_LINK); + err = f2fs_add_link(dentry, inode); + if (err) + goto out; + + d_instantiate(dentry, inode); + + f2fs_balance_fs(sbi); + return 0; +out: + clear_inode_flag(F2FS_I(inode), FI_INC_LINK); + iput(inode); + 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_MAX_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); + kunmap(page); + f2fs_put_page(page, 0); + + inode = f2fs_iget(dir->i_sb, ino); + if (IS_ERR(inode)) + return ERR_CAST(inode); + } + + return d_splice_alias(inode, dentry); +} + +static int f2fs_unlink(struct inode *dir, struct dentry *dentry) +{ + struct super_block *sb = dir->i_sb; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct inode *inode = dentry->d_inode; + struct f2fs_dir_entry *de; + struct page *page; + int err = -ENOENT; + + de = f2fs_find_entry(dir, &dentry->d_name, &page); + if (!de) + goto fail; + + err = check_orphan_space(sbi); + if (err) { + kunmap(page); + f2fs_put_page(page, 0); + goto fail; + } + + f2fs_delete_entry(de, page, inode); + + /* In order to evict this inode, we set it dirty */ + mark_inode_dirty(inode); + f2fs_balance_fs(sbi); +fail: + return err; +} + +static int f2fs_symlink(struct inode *dir, struct dentry *dentry, + const char *symname) +{ + struct super_block *sb = dir->i_sb; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct inode *inode; + unsigned symlen = strlen(symname) + 1; + int err; + + 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; + + err = f2fs_add_link(dentry, inode); + if (err) + goto out; + + err = page_symlink(inode, symname, symlen); + alloc_nid_done(sbi, inode->i_ino); + + d_instantiate(dentry, inode); + unlock_new_inode(inode); + + f2fs_balance_fs(sbi); + + return err; +out: + clear_nlink(inode); + unlock_new_inode(inode); + iput(inode); + alloc_nid_failed(sbi, inode->i_ino); + return err; +} + +static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) +{ + struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb); + struct inode *inode; + int err; + + inode = f2fs_new_inode(dir, S_IFDIR | mode); + err = PTR_ERR(inode); + if (IS_ERR(inode)) + return err; + + 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 | __GFP_ZERO); + + set_inode_flag(F2FS_I(inode), FI_INC_LINK); + err = f2fs_add_link(dentry, inode); + if (err) + goto out_fail; + + alloc_nid_done(sbi, inode->i_ino); + + d_instantiate(dentry, inode); + unlock_new_inode(inode); + + f2fs_balance_fs(sbi); + return 0; + +out_fail: + clear_inode_flag(F2FS_I(inode), FI_INC_LINK); + clear_nlink(inode); + unlock_new_inode(inode); + iput(inode); + alloc_nid_failed(sbi, inode->i_ino); + return err; +} + +static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) +{ + struct inode *inode = dentry->d_inode; + 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 super_block *sb = dir->i_sb; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct inode *inode; + int err = 0; + + if (!new_valid_dev(rdev)) + return -EINVAL; + + 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; + + err = f2fs_add_link(dentry, inode); + if (err) + goto out; + + alloc_nid_done(sbi, inode->i_ino); + d_instantiate(dentry, inode); + unlock_new_inode(inode); + + f2fs_balance_fs(sbi); + + return 0; +out: + clear_nlink(inode); + unlock_new_inode(inode); + iput(inode); + alloc_nid_failed(sbi, inode->i_ino); + return err; +} + +static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, + struct inode *new_dir, struct dentry *new_dentry) +{ + struct super_block *sb = old_dir->i_sb; + struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct inode *old_inode = old_dentry->d_inode; + struct inode *new_inode = new_dentry->d_inode; + struct page *old_dir_page; + struct page *old_page; + struct f2fs_dir_entry *old_dir_entry = NULL; + struct f2fs_dir_entry *old_entry; + struct f2fs_dir_entry *new_entry; + int err = -ENOENT; + + 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; + } + + mutex_lock_op(sbi, RENAME); + + if (new_inode) { + struct page *new_page; + + 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_set_link(new_dir, new_entry, new_page, old_inode); + + new_inode->i_ctime = CURRENT_TIME; + if (old_dir_entry) + drop_nlink(new_inode); + drop_nlink(new_inode); + if (!new_inode->i_nlink) + add_orphan_inode(sbi, new_inode->i_ino); + f2fs_write_inode(new_inode, NULL); + } else { + err = f2fs_add_link(new_dentry, old_inode); + if (err) + goto out_dir; + + if (old_dir_entry) { + inc_nlink(new_dir); + f2fs_write_inode(new_dir, NULL); + } + } + + old_inode->i_ctime = CURRENT_TIME; + set_inode_flag(F2FS_I(old_inode), FI_NEED_CP); + mark_inode_dirty(old_inode); + + f2fs_delete_entry(old_entry, old_page, NULL); + + if (old_dir_entry) { + if (old_dir != new_dir) { + f2fs_set_link(old_inode, old_dir_entry, + old_dir_page, new_dir); + } else { + kunmap(old_dir_page); + f2fs_put_page(old_dir_page, 0); + } + drop_nlink(old_dir); + f2fs_write_inode(old_dir, NULL); + } + + mutex_unlock_op(sbi, RENAME); + + f2fs_balance_fs(sbi); + return 0; + +out_dir: + if (old_dir_entry) { + kunmap(old_dir_page); + f2fs_put_page(old_dir_page, 0); + } + mutex_unlock_op(sbi, RENAME); +out_old: + kunmap(old_page); + f2fs_put_page(old_page, 0); +out: + 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, + .rename = f2fs_rename, + .setattr = f2fs_setattr, + .get_acl = f2fs_get_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 = page_follow_link_light, + .put_link = page_put_link, + .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 = { + .setattr = f2fs_setattr, + .get_acl = f2fs_get_acl, +#ifdef CONFIG_F2FS_FS_XATTR + .setxattr = generic_setxattr, + .getxattr = generic_getxattr, + .listxattr = f2fs_listxattr, + .removexattr = generic_removexattr, +#endif +}; -- 1.7.9.5 --- Jaegeuk Kim Samsung -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
