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b138547818
gcc 8.1.0 complains: fs/f2fs/namei.c: In function 'f2fs_update_extension_list': fs/f2fs/namei.c:257:3: warning: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length fs/f2fs/namei.c:249:3: warning: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length Using strncpy() is indeed less than perfect since the length of data to be copied has already been determined with strlen(). Replace strncpy() with memcpy() to address the warning and optimize the code a little. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
1248 lines
28 KiB
C
1248 lines
28 KiB
C
/*
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* fs/f2fs/namei.c
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*
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* Copyright (c) 2012 Samsung Electronics Co., Ltd.
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* http://www.samsung.com/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/fs.h>
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#include <linux/f2fs_fs.h>
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#include <linux/pagemap.h>
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#include <linux/sched.h>
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#include <linux/ctype.h>
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#include <linux/dcache.h>
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#include <linux/namei.h>
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#include <linux/quotaops.h>
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#include "f2fs.h"
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#include "node.h"
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#include "xattr.h"
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#include "acl.h"
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#include <trace/events/f2fs.h>
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static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
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{
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struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
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nid_t ino;
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struct inode *inode;
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bool nid_free = false;
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int xattr_size = 0;
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int err;
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inode = new_inode(dir->i_sb);
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if (!inode)
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return ERR_PTR(-ENOMEM);
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f2fs_lock_op(sbi);
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if (!f2fs_alloc_nid(sbi, &ino)) {
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f2fs_unlock_op(sbi);
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err = -ENOSPC;
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goto fail;
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}
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f2fs_unlock_op(sbi);
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nid_free = true;
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inode_init_owner(inode, dir, mode);
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inode->i_ino = ino;
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inode->i_blocks = 0;
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inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
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F2FS_I(inode)->i_crtime = inode->i_mtime;
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inode->i_generation = sbi->s_next_generation++;
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if (S_ISDIR(inode->i_mode))
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F2FS_I(inode)->i_current_depth = 1;
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err = insert_inode_locked(inode);
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if (err) {
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err = -EINVAL;
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goto fail;
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}
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if (f2fs_sb_has_project_quota(sbi->sb) &&
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(F2FS_I(dir)->i_flags & F2FS_PROJINHERIT_FL))
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F2FS_I(inode)->i_projid = F2FS_I(dir)->i_projid;
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else
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F2FS_I(inode)->i_projid = make_kprojid(&init_user_ns,
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F2FS_DEF_PROJID);
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err = dquot_initialize(inode);
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if (err)
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goto fail_drop;
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err = dquot_alloc_inode(inode);
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if (err)
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goto fail_drop;
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set_inode_flag(inode, FI_NEW_INODE);
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/* If the directory encrypted, then we should encrypt the inode. */
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if ((f2fs_encrypted_inode(dir) || DUMMY_ENCRYPTION_ENABLED(sbi)) &&
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f2fs_may_encrypt(inode))
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f2fs_set_encrypted_inode(inode);
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if (f2fs_sb_has_extra_attr(sbi->sb)) {
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set_inode_flag(inode, FI_EXTRA_ATTR);
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F2FS_I(inode)->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE;
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}
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if (test_opt(sbi, INLINE_XATTR))
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set_inode_flag(inode, FI_INLINE_XATTR);
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if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode))
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set_inode_flag(inode, FI_INLINE_DATA);
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if (f2fs_may_inline_dentry(inode))
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set_inode_flag(inode, FI_INLINE_DENTRY);
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if (f2fs_sb_has_flexible_inline_xattr(sbi->sb)) {
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f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode));
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if (f2fs_has_inline_xattr(inode))
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xattr_size = F2FS_OPTION(sbi).inline_xattr_size;
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/* Otherwise, will be 0 */
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} else if (f2fs_has_inline_xattr(inode) ||
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f2fs_has_inline_dentry(inode)) {
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xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
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}
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F2FS_I(inode)->i_inline_xattr_size = xattr_size;
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f2fs_init_extent_tree(inode, NULL);
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stat_inc_inline_xattr(inode);
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stat_inc_inline_inode(inode);
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stat_inc_inline_dir(inode);
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F2FS_I(inode)->i_flags =
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f2fs_mask_flags(mode, F2FS_I(dir)->i_flags & F2FS_FL_INHERITED);
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if (S_ISDIR(inode->i_mode))
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F2FS_I(inode)->i_flags |= F2FS_INDEX_FL;
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if (F2FS_I(inode)->i_flags & F2FS_PROJINHERIT_FL)
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set_inode_flag(inode, FI_PROJ_INHERIT);
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trace_f2fs_new_inode(inode, 0);
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return inode;
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fail:
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trace_f2fs_new_inode(inode, err);
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make_bad_inode(inode);
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if (nid_free)
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set_inode_flag(inode, FI_FREE_NID);
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iput(inode);
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return ERR_PTR(err);
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fail_drop:
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trace_f2fs_new_inode(inode, err);
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dquot_drop(inode);
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inode->i_flags |= S_NOQUOTA;
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if (nid_free)
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set_inode_flag(inode, FI_FREE_NID);
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clear_nlink(inode);
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unlock_new_inode(inode);
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iput(inode);
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return ERR_PTR(err);
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}
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static int is_extension_exist(const unsigned char *s, const char *sub)
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{
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size_t slen = strlen(s);
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size_t sublen = strlen(sub);
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int i;
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/*
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* filename format of multimedia file should be defined as:
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* "filename + '.' + extension + (optional: '.' + temp extension)".
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*/
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if (slen < sublen + 2)
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return 0;
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for (i = 1; i < slen - sublen; i++) {
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if (s[i] != '.')
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continue;
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if (!strncasecmp(s + i + 1, sub, sublen))
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return 1;
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}
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return 0;
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}
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/*
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* Set multimedia files as cold files for hot/cold data separation
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*/
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static inline void set_file_temperature(struct f2fs_sb_info *sbi, struct inode *inode,
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const unsigned char *name)
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{
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__u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
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int i, cold_count, hot_count;
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down_read(&sbi->sb_lock);
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cold_count = le32_to_cpu(sbi->raw_super->extension_count);
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hot_count = sbi->raw_super->hot_ext_count;
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for (i = 0; i < cold_count + hot_count; i++) {
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if (!is_extension_exist(name, extlist[i]))
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continue;
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if (i < cold_count)
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file_set_cold(inode);
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else
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file_set_hot(inode);
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break;
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}
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up_read(&sbi->sb_lock);
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}
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int f2fs_update_extension_list(struct f2fs_sb_info *sbi, const char *name,
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bool hot, bool set)
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{
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__u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list;
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int cold_count = le32_to_cpu(sbi->raw_super->extension_count);
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int hot_count = sbi->raw_super->hot_ext_count;
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int total_count = cold_count + hot_count;
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int start, count;
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int i;
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if (set) {
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if (total_count == F2FS_MAX_EXTENSION)
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return -EINVAL;
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} else {
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if (!hot && !cold_count)
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return -EINVAL;
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if (hot && !hot_count)
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return -EINVAL;
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}
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if (hot) {
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start = cold_count;
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count = total_count;
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} else {
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start = 0;
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count = cold_count;
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}
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for (i = start; i < count; i++) {
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if (strcmp(name, extlist[i]))
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continue;
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if (set)
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return -EINVAL;
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memcpy(extlist[i], extlist[i + 1],
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F2FS_EXTENSION_LEN * (total_count - i - 1));
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memset(extlist[total_count - 1], 0, F2FS_EXTENSION_LEN);
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if (hot)
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sbi->raw_super->hot_ext_count = hot_count - 1;
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else
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sbi->raw_super->extension_count =
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cpu_to_le32(cold_count - 1);
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return 0;
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}
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if (!set)
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return -EINVAL;
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if (hot) {
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memcpy(extlist[count], name, strlen(name));
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sbi->raw_super->hot_ext_count = hot_count + 1;
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} else {
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char buf[F2FS_MAX_EXTENSION][F2FS_EXTENSION_LEN];
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memcpy(buf, &extlist[cold_count],
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F2FS_EXTENSION_LEN * hot_count);
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memset(extlist[cold_count], 0, F2FS_EXTENSION_LEN);
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memcpy(extlist[cold_count], name, strlen(name));
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memcpy(&extlist[cold_count + 1], buf,
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F2FS_EXTENSION_LEN * hot_count);
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sbi->raw_super->extension_count = cpu_to_le32(cold_count + 1);
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}
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return 0;
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}
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static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
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bool excl)
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{
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struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
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struct inode *inode;
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nid_t ino = 0;
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int err;
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if (unlikely(f2fs_cp_error(sbi)))
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return -EIO;
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err = dquot_initialize(dir);
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if (err)
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return err;
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inode = f2fs_new_inode(dir, mode);
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if (IS_ERR(inode))
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return PTR_ERR(inode);
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if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
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set_file_temperature(sbi, inode, dentry->d_name.name);
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inode->i_op = &f2fs_file_inode_operations;
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inode->i_fop = &f2fs_file_operations;
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inode->i_mapping->a_ops = &f2fs_dblock_aops;
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ino = inode->i_ino;
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f2fs_lock_op(sbi);
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err = f2fs_add_link(dentry, inode);
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if (err)
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goto out;
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f2fs_unlock_op(sbi);
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f2fs_alloc_nid_done(sbi, ino);
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d_instantiate_new(dentry, inode);
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if (IS_DIRSYNC(dir))
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f2fs_sync_fs(sbi->sb, 1);
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f2fs_balance_fs(sbi, true);
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return 0;
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out:
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f2fs_handle_failed_inode(inode);
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return err;
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}
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static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
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struct dentry *dentry)
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{
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struct inode *inode = d_inode(old_dentry);
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struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
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int err;
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if (unlikely(f2fs_cp_error(sbi)))
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return -EIO;
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err = fscrypt_prepare_link(old_dentry, dir, dentry);
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if (err)
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return err;
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if (is_inode_flag_set(dir, FI_PROJ_INHERIT) &&
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(!projid_eq(F2FS_I(dir)->i_projid,
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F2FS_I(old_dentry->d_inode)->i_projid)))
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return -EXDEV;
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|
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err = dquot_initialize(dir);
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if (err)
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return err;
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|
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f2fs_balance_fs(sbi, true);
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inode->i_ctime = current_time(inode);
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ihold(inode);
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set_inode_flag(inode, FI_INC_LINK);
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f2fs_lock_op(sbi);
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err = f2fs_add_link(dentry, inode);
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if (err)
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goto out;
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f2fs_unlock_op(sbi);
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d_instantiate(dentry, inode);
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|
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if (IS_DIRSYNC(dir))
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f2fs_sync_fs(sbi->sb, 1);
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return 0;
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out:
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clear_inode_flag(inode, FI_INC_LINK);
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iput(inode);
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f2fs_unlock_op(sbi);
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return err;
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}
|
|
|
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struct dentry *f2fs_get_parent(struct dentry *child)
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{
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struct qstr dotdot = QSTR_INIT("..", 2);
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struct page *page;
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unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot, &page);
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|
if (!ino) {
|
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if (IS_ERR(page))
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return ERR_CAST(page);
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return ERR_PTR(-ENOENT);
|
|
}
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return d_obtain_alias(f2fs_iget(child->d_sb, ino));
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}
|
|
|
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static int __recover_dot_dentries(struct inode *dir, nid_t pino)
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{
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struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
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struct qstr dot = QSTR_INIT(".", 1);
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struct qstr dotdot = QSTR_INIT("..", 2);
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struct f2fs_dir_entry *de;
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|
struct page *page;
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int err = 0;
|
|
|
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if (f2fs_readonly(sbi->sb)) {
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f2fs_msg(sbi->sb, KERN_INFO,
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"skip recovering inline_dots inode (ino:%lu, pino:%u) "
|
|
"in readonly mountpoint", dir->i_ino, pino);
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return 0;
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|
}
|
|
|
|
err = dquot_initialize(dir);
|
|
if (err)
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return err;
|
|
|
|
f2fs_balance_fs(sbi, true);
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|
|
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f2fs_lock_op(sbi);
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|
|
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de = f2fs_find_entry(dir, &dot, &page);
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if (de) {
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|
f2fs_put_page(page, 0);
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|
} 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));
|
|
|
|
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 = 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_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_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 inode *dir, struct dentry *dentry, umode_t mode)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
|
|
struct inode *inode;
|
|
int err;
|
|
|
|
if (unlikely(f2fs_cp_error(sbi)))
|
|
return -EIO;
|
|
|
|
err = dquot_initialize(dir);
|
|
if (err)
|
|
return err;
|
|
|
|
inode = f2fs_new_inode(dir, S_IFDIR | mode);
|
|
if (IS_ERR(inode))
|
|
return PTR_ERR(inode);
|
|
|
|
inode->i_op = &f2fs_dir_inode_operations;
|
|
inode->i_fop = &f2fs_dir_operations;
|
|
inode->i_mapping->a_ops = &f2fs_dblock_aops;
|
|
inode_nohighmem(inode);
|
|
|
|
set_inode_flag(inode, FI_INC_LINK);
|
|
f2fs_lock_op(sbi);
|
|
err = f2fs_add_link(dentry, inode);
|
|
if (err)
|
|
goto out_fail;
|
|
f2fs_unlock_op(sbi);
|
|
|
|
f2fs_alloc_nid_done(sbi, inode->i_ino);
|
|
|
|
d_instantiate_new(dentry, inode);
|
|
|
|
if (IS_DIRSYNC(dir))
|
|
f2fs_sync_fs(sbi->sb, 1);
|
|
|
|
f2fs_balance_fs(sbi, true);
|
|
return 0;
|
|
|
|
out_fail:
|
|
clear_inode_flag(inode, FI_INC_LINK);
|
|
f2fs_handle_failed_inode(inode);
|
|
return err;
|
|
}
|
|
|
|
static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
|
|
{
|
|
struct inode *inode = d_inode(dentry);
|
|
if (f2fs_empty_dir(inode))
|
|
return f2fs_unlink(dir, dentry);
|
|
return -ENOTEMPTY;
|
|
}
|
|
|
|
static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
|
|
umode_t mode, dev_t rdev)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
|
|
struct inode *inode;
|
|
int err = 0;
|
|
|
|
if (unlikely(f2fs_cp_error(sbi)))
|
|
return -EIO;
|
|
|
|
err = dquot_initialize(dir);
|
|
if (err)
|
|
return err;
|
|
|
|
inode = f2fs_new_inode(dir, mode);
|
|
if (IS_ERR(inode))
|
|
return PTR_ERR(inode);
|
|
|
|
init_special_inode(inode, inode->i_mode, rdev);
|
|
inode->i_op = &f2fs_special_inode_operations;
|
|
|
|
f2fs_lock_op(sbi);
|
|
err = f2fs_add_link(dentry, inode);
|
|
if (err)
|
|
goto out;
|
|
f2fs_unlock_op(sbi);
|
|
|
|
f2fs_alloc_nid_done(sbi, inode->i_ino);
|
|
|
|
d_instantiate_new(dentry, inode);
|
|
|
|
if (IS_DIRSYNC(dir))
|
|
f2fs_sync_fs(sbi->sb, 1);
|
|
|
|
f2fs_balance_fs(sbi, true);
|
|
return 0;
|
|
out:
|
|
f2fs_handle_failed_inode(inode);
|
|
return err;
|
|
}
|
|
|
|
static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry,
|
|
umode_t mode, struct inode **whiteout)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
|
|
struct inode *inode;
|
|
int err;
|
|
|
|
err = dquot_initialize(dir);
|
|
if (err)
|
|
return err;
|
|
|
|
inode = f2fs_new_inode(dir, mode);
|
|
if (IS_ERR(inode))
|
|
return PTR_ERR(inode);
|
|
|
|
if (whiteout) {
|
|
init_special_inode(inode, inode->i_mode, WHITEOUT_DEV);
|
|
inode->i_op = &f2fs_special_inode_operations;
|
|
} else {
|
|
inode->i_op = &f2fs_file_inode_operations;
|
|
inode->i_fop = &f2fs_file_operations;
|
|
inode->i_mapping->a_ops = &f2fs_dblock_aops;
|
|
}
|
|
|
|
f2fs_lock_op(sbi);
|
|
err = f2fs_acquire_orphan_inode(sbi);
|
|
if (err)
|
|
goto out;
|
|
|
|
err = f2fs_do_tmpfile(inode, dir);
|
|
if (err)
|
|
goto release_out;
|
|
|
|
/*
|
|
* add this non-linked tmpfile to orphan list, in this way we could
|
|
* remove all unused data of tmpfile after abnormal power-off.
|
|
*/
|
|
f2fs_add_orphan_inode(inode);
|
|
f2fs_alloc_nid_done(sbi, inode->i_ino);
|
|
|
|
if (whiteout) {
|
|
f2fs_i_links_write(inode, false);
|
|
*whiteout = inode;
|
|
} else {
|
|
d_tmpfile(dentry, inode);
|
|
}
|
|
/* link_count was changed by d_tmpfile as well. */
|
|
f2fs_unlock_op(sbi);
|
|
unlock_new_inode(inode);
|
|
|
|
f2fs_balance_fs(sbi, true);
|
|
return 0;
|
|
|
|
release_out:
|
|
f2fs_release_orphan_inode(sbi);
|
|
out:
|
|
f2fs_handle_failed_inode(inode);
|
|
return err;
|
|
}
|
|
|
|
static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
|
|
|
|
if (unlikely(f2fs_cp_error(sbi)))
|
|
return -EIO;
|
|
|
|
if (f2fs_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 = f2fs_acquire_orphan_inode(sbi);
|
|
if (err)
|
|
goto put_out_dir;
|
|
|
|
f2fs_set_link(new_dir, new_entry, new_page, old_inode);
|
|
|
|
new_inode->i_ctime = current_time(new_inode);
|
|
down_write(&F2FS_I(new_inode)->i_sem);
|
|
if (old_dir_entry)
|
|
f2fs_i_links_write(new_inode, false);
|
|
f2fs_i_links_write(new_inode, false);
|
|
up_write(&F2FS_I(new_inode)->i_sem);
|
|
|
|
if (!new_inode->i_nlink)
|
|
f2fs_add_orphan_inode(new_inode);
|
|
else
|
|
f2fs_release_orphan_inode(sbi);
|
|
} else {
|
|
f2fs_balance_fs(sbi, true);
|
|
|
|
f2fs_lock_op(sbi);
|
|
|
|
err = f2fs_add_link(new_dentry, old_inode);
|
|
if (err) {
|
|
f2fs_unlock_op(sbi);
|
|
goto out_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
|
|
F2FS_I(old_inode)->i_pino = 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) {
|
|
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);
|
|
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);
|
|
file_lost_pino(old_inode);
|
|
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);
|
|
file_lost_pino(new_inode);
|
|
up_write(&F2FS_I(new_inode)->i_sem);
|
|
|
|
new_dir->i_ctime = current_time(new_dir);
|
|
if (new_nlink) {
|
|
down_write(&F2FS_I(new_dir)->i_sem);
|
|
f2fs_i_links_write(new_dir, new_nlink > 0);
|
|
up_write(&F2FS_I(new_dir)->i_sem);
|
|
}
|
|
f2fs_mark_inode_dirty_sync(new_dir, false);
|
|
|
|
if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) {
|
|
f2fs_add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
|
|
f2fs_add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
|
|
}
|
|
|
|
f2fs_unlock_op(sbi);
|
|
|
|
if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
|
|
f2fs_sync_fs(sbi->sb, 1);
|
|
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
|
|
};
|