b24413180f560 (Greg Kroah-Hartman 2017-11-01 15:07:57 +0100 1) // SPDX-License-Identifier: GPL-2.0
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 2) /*
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 3) * linux/fs/ufs/namei.c
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 4) *
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 5) * Migration to usage of "page cache" on May 2006 by
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 6) * Evgeniy Dushistov <dushistov@mail.ru> based on ext2 code base.
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 7) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 8) * Copyright (C) 1998
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 9) * Daniel Pirkl <daniel.pirkl@email.cz>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 10) * Charles University, Faculty of Mathematics and Physics
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 11) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 12) * from
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 13) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 14) * linux/fs/ext2/namei.c
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 15) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 16) * Copyright (C) 1992, 1993, 1994, 1995
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 17) * Remy Card (card@masi.ibp.fr)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 18) * Laboratoire MASI - Institut Blaise Pascal
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 19) * Universite Pierre et Marie Curie (Paris VI)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 20) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 21) * from
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 22) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 23) * linux/fs/minix/namei.c
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 24) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 25) * Copyright (C) 1991, 1992 Linus Torvalds
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 26) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 27) * Big-endian to little-endian byte-swapping/bitmaps by
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 28) * David S. Miller (davem@caip.rutgers.edu), 1995
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 29) */
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 30)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 31) #include <linux/time.h>
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 32) #include <linux/fs.h>
e542059884bb6 (Mike Frysinger 2008-02-08 04:21:31 -0800 33)
e542059884bb6 (Mike Frysinger 2008-02-08 04:21:31 -0800 34) #include "ufs_fs.h"
bcd6d4ecf6868 (Christoph Hellwig 2007-10-16 23:26:51 -0700 35) #include "ufs.h"
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 36) #include "util.h"
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 37)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 38) static inline int ufs_add_nondir(struct dentry *dentry, struct inode *inode)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 39) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 40) int err = ufs_add_link(dentry, inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 41) if (!err) {
1e2e547a93a00 (Al Viro 2018-05-04 08:23:01 -0400 42) d_instantiate_new(dentry, inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 43) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 44) }
3257545e40a76 (Alexey Dobriyan 2006-03-23 03:00:53 -0800 45) inode_dec_link_count(inode);
dd54992776ebb (Al Viro 2018-05-16 12:22:50 -0400 46) discard_new_inode(inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 47) return err;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 48) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 49)
00cd8dd3bf95f (Al Viro 2012-06-10 17:13:09 -0400 50) static struct dentry *ufs_lookup(struct inode * dir, struct dentry *dentry, unsigned int flags)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 51) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 52) struct inode * inode = NULL;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 53) ino_t ino;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 54)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 55) if (dentry->d_name.len > UFS_MAXNAMLEN)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 56) return ERR_PTR(-ENAMETOOLONG);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 57)
080497079c0ba (Alexey Dobriyan 2009-12-15 16:46:50 -0800 58) ino = ufs_inode_by_name(dir, &dentry->d_name);
642c937b4ed2e (Al Viro 2011-07-17 10:07:34 -0400 59) if (ino)
b55c460da6df4 (David Howells 2008-02-07 00:15:48 -0800 60) inode = ufs_iget(dir->i_sb, ino);
642c937b4ed2e (Al Viro 2011-07-17 10:07:34 -0400 61) return d_splice_alias(inode, dentry);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 62) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 63)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 64) /*
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 65) * By the time this is called, we already have created
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 66) * the directory cache entry for the new file, but it
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 67) * is so far negative - it has no inode.
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 68) *
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 69) * If the create succeeds, we fill in the inode information
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 70) * with d_instantiate().
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 71) */
549c7297717c3 (Christian Brauner 2021-01-21 14:19:43 +0100 72) static int ufs_create (struct user_namespace * mnt_userns,
549c7297717c3 (Christian Brauner 2021-01-21 14:19:43 +0100 73) struct inode * dir, struct dentry * dentry, umode_t mode,
ebfc3b49a7ac2 (Al Viro 2012-06-10 18:05:36 -0400 74) bool excl)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 75) {
abf5d15fd2e52 (Evgeniy Dushistov 2006-06-25 05:47:24 -0700 76) struct inode *inode;
907f4554e2521 (Christoph Hellwig 2010-03-03 09:05:06 -0500 77)
abf5d15fd2e52 (Evgeniy Dushistov 2006-06-25 05:47:24 -0700 78) inode = ufs_new_inode(dir, mode);
a50e4a02ad695 (Al Viro 2015-06-16 01:50:43 -0400 79) if (IS_ERR(inode))
a50e4a02ad695 (Al Viro 2015-06-16 01:50:43 -0400 80) return PTR_ERR(inode);
abf5d15fd2e52 (Evgeniy Dushistov 2006-06-25 05:47:24 -0700 81)
a50e4a02ad695 (Al Viro 2015-06-16 01:50:43 -0400 82) inode->i_op = &ufs_file_inode_operations;
a50e4a02ad695 (Al Viro 2015-06-16 01:50:43 -0400 83) inode->i_fop = &ufs_file_operations;
a50e4a02ad695 (Al Viro 2015-06-16 01:50:43 -0400 84) inode->i_mapping->a_ops = &ufs_aops;
a50e4a02ad695 (Al Viro 2015-06-16 01:50:43 -0400 85) mark_inode_dirty(inode);
a50e4a02ad695 (Al Viro 2015-06-16 01:50:43 -0400 86) return ufs_add_nondir(dentry, inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 87) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 88)
549c7297717c3 (Christian Brauner 2021-01-21 14:19:43 +0100 89) static int ufs_mknod(struct user_namespace *mnt_userns, struct inode *dir,
549c7297717c3 (Christian Brauner 2021-01-21 14:19:43 +0100 90) struct dentry *dentry, umode_t mode, dev_t rdev)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 91) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 92) struct inode *inode;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 93) int err;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 94)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 95) if (!old_valid_dev(rdev))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 96) return -EINVAL;
907f4554e2521 (Christoph Hellwig 2010-03-03 09:05:06 -0500 97)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 98) inode = ufs_new_inode(dir, mode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 99) err = PTR_ERR(inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 100) if (!IS_ERR(inode)) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 101) init_special_inode(inode, mode, rdev);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 102) ufs_set_inode_dev(inode->i_sb, UFS_I(inode), rdev);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 103) mark_inode_dirty(inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 104) err = ufs_add_nondir(dentry, inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 105) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 106) return err;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 107) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 108)
549c7297717c3 (Christian Brauner 2021-01-21 14:19:43 +0100 109) static int ufs_symlink (struct user_namespace * mnt_userns, struct inode * dir,
549c7297717c3 (Christian Brauner 2021-01-21 14:19:43 +0100 110) struct dentry * dentry, const char * symname)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 111) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 112) struct super_block * sb = dir->i_sb;
a50e4a02ad695 (Al Viro 2015-06-16 01:50:43 -0400 113) int err;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 114) unsigned l = strlen(symname)+1;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 115) struct inode * inode;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 116)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 117) if (l > sb->s_blocksize)
a50e4a02ad695 (Al Viro 2015-06-16 01:50:43 -0400 118) return -ENAMETOOLONG;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 119)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 120) inode = ufs_new_inode(dir, S_IFLNK | S_IRWXUGO);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 121) err = PTR_ERR(inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 122) if (IS_ERR(inode))
a50e4a02ad695 (Al Viro 2015-06-16 01:50:43 -0400 123) return err;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 124)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 125) if (l > UFS_SB(sb)->s_uspi->s_maxsymlinklen) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 126) /* slow symlink */
9cdce3c074fbd (Al Viro 2015-11-15 18:24:17 -0500 127) inode->i_op = &page_symlink_inode_operations;
21fc61c73c390 (Al Viro 2015-11-17 01:07:57 -0500 128) inode_nohighmem(inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 129) inode->i_mapping->a_ops = &ufs_aops;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 130) err = page_symlink(inode, symname, l);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 131) if (err)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 132) goto out_fail;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 133) } else {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 134) /* fast symlink */
9cdce3c074fbd (Al Viro 2015-11-15 18:24:17 -0500 135) inode->i_op = &simple_symlink_inode_operations;
4b8061a67f67e (Al Viro 2015-05-02 10:28:56 -0400 136) inode->i_link = (char *)UFS_I(inode)->i_u1.i_symlink;
4b8061a67f67e (Al Viro 2015-05-02 10:28:56 -0400 137) memcpy(inode->i_link, symname, l);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 138) inode->i_size = l-1;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 139) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 140) mark_inode_dirty(inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 141)
a50e4a02ad695 (Al Viro 2015-06-16 01:50:43 -0400 142) return ufs_add_nondir(dentry, inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 143)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 144) out_fail:
3257545e40a76 (Alexey Dobriyan 2006-03-23 03:00:53 -0800 145) inode_dec_link_count(inode);
dd54992776ebb (Al Viro 2018-05-16 12:22:50 -0400 146) discard_new_inode(inode);
a50e4a02ad695 (Al Viro 2015-06-16 01:50:43 -0400 147) return err;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 148) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 149)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 150) static int ufs_link (struct dentry * old_dentry, struct inode * dir,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 151) struct dentry *dentry)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 152) {
2b0143b5c986b (David Howells 2015-03-17 22:25:59 +0000 153) struct inode *inode = d_inode(old_dentry);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 154) int error;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 155)
02027d42c3f74 (Deepa Dinamani 2016-09-14 07:48:05 -0700 156) inode->i_ctime = current_time(inode);
3257545e40a76 (Alexey Dobriyan 2006-03-23 03:00:53 -0800 157) inode_inc_link_count(inode);
7de9c6ee3ecff (Al Viro 2010-10-23 11:11:40 -0400 158) ihold(inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 159)
12ecbb4b1d765 (Jan Kara 2015-06-01 14:52:04 +0200 160) error = ufs_add_link(dentry, inode);
12ecbb4b1d765 (Jan Kara 2015-06-01 14:52:04 +0200 161) if (error) {
12ecbb4b1d765 (Jan Kara 2015-06-01 14:52:04 +0200 162) inode_dec_link_count(inode);
12ecbb4b1d765 (Jan Kara 2015-06-01 14:52:04 +0200 163) iput(inode);
12ecbb4b1d765 (Jan Kara 2015-06-01 14:52:04 +0200 164) } else
12ecbb4b1d765 (Jan Kara 2015-06-01 14:52:04 +0200 165) d_instantiate(dentry, inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 166) return error;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 167) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 168)
549c7297717c3 (Christian Brauner 2021-01-21 14:19:43 +0100 169) static int ufs_mkdir(struct user_namespace * mnt_userns, struct inode * dir,
549c7297717c3 (Christian Brauner 2021-01-21 14:19:43 +0100 170) struct dentry * dentry, umode_t mode)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 171) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 172) struct inode * inode;
8de52778798fe (Al Viro 2012-02-06 12:45:27 -0500 173) int err;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 174)
13b987ea27584 (Fabian Frederick 2015-06-10 10:09:32 +1000 175) inode_inc_link_count(dir);
13b987ea27584 (Fabian Frederick 2015-06-10 10:09:32 +1000 176)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 177) inode = ufs_new_inode(dir, S_IFDIR|mode);
13b987ea27584 (Fabian Frederick 2015-06-10 10:09:32 +1000 178) err = PTR_ERR(inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 179) if (IS_ERR(inode))
13b987ea27584 (Fabian Frederick 2015-06-10 10:09:32 +1000 180) goto out_dir;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 181)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 182) inode->i_op = &ufs_dir_inode_operations;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 183) inode->i_fop = &ufs_dir_operations;
826843a347cc8 (Evgeniy Dushistov 2006-06-25 05:47:21 -0700 184) inode->i_mapping->a_ops = &ufs_aops;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 185)
3257545e40a76 (Alexey Dobriyan 2006-03-23 03:00:53 -0800 186) inode_inc_link_count(inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 187)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 188) err = ufs_make_empty(inode, dir);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 189) if (err)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 190) goto out_fail;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 191)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 192) err = ufs_add_link(dentry, inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 193) if (err)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 194) goto out_fail;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 195)
1e2e547a93a00 (Al Viro 2018-05-04 08:23:01 -0400 196) d_instantiate_new(dentry, inode);
a50e4a02ad695 (Al Viro 2015-06-16 01:50:43 -0400 197) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 198)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 199) out_fail:
3257545e40a76 (Alexey Dobriyan 2006-03-23 03:00:53 -0800 200) inode_dec_link_count(inode);
3257545e40a76 (Alexey Dobriyan 2006-03-23 03:00:53 -0800 201) inode_dec_link_count(inode);
dd54992776ebb (Al Viro 2018-05-16 12:22:50 -0400 202) discard_new_inode(inode);
13b987ea27584 (Fabian Frederick 2015-06-10 10:09:32 +1000 203) out_dir:
3257545e40a76 (Alexey Dobriyan 2006-03-23 03:00:53 -0800 204) inode_dec_link_count(dir);
a50e4a02ad695 (Al Viro 2015-06-16 01:50:43 -0400 205) return err;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 206) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 207)
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 208) static int ufs_unlink(struct inode *dir, struct dentry *dentry)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 209) {
2b0143b5c986b (David Howells 2015-03-17 22:25:59 +0000 210) struct inode * inode = d_inode(dentry);
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 211) struct ufs_dir_entry *de;
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 212) struct page *page;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 213) int err = -ENOENT;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 214)
080497079c0ba (Alexey Dobriyan 2009-12-15 16:46:50 -0800 215) de = ufs_find_entry(dir, &dentry->d_name, &page);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 216) if (!de)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 217) goto out;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 218)
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 219) err = ufs_delete_entry(dir, de, page);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 220) if (err)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 221) goto out;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 222)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 223) inode->i_ctime = dir->i_ctime;
3257545e40a76 (Alexey Dobriyan 2006-03-23 03:00:53 -0800 224) inode_dec_link_count(inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 225) err = 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 226) out:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 227) return err;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 228) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 229)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 230) static int ufs_rmdir (struct inode * dir, struct dentry *dentry)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 231) {
2b0143b5c986b (David Howells 2015-03-17 22:25:59 +0000 232) struct inode * inode = d_inode(dentry);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 233) int err= -ENOTEMPTY;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 234)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 235) if (ufs_empty_dir (inode)) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 236) err = ufs_unlink(dir, dentry);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 237) if (!err) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 238) inode->i_size = 0;
3257545e40a76 (Alexey Dobriyan 2006-03-23 03:00:53 -0800 239) inode_dec_link_count(inode);
3257545e40a76 (Alexey Dobriyan 2006-03-23 03:00:53 -0800 240) inode_dec_link_count(dir);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 241) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 242) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 243) return err;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 244) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 245)
549c7297717c3 (Christian Brauner 2021-01-21 14:19:43 +0100 246) static int ufs_rename(struct user_namespace *mnt_userns, struct inode *old_dir,
549c7297717c3 (Christian Brauner 2021-01-21 14:19:43 +0100 247) struct dentry *old_dentry, struct inode *new_dir,
549c7297717c3 (Christian Brauner 2021-01-21 14:19:43 +0100 248) struct dentry *new_dentry, unsigned int flags)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 249) {
2b0143b5c986b (David Howells 2015-03-17 22:25:59 +0000 250) struct inode *old_inode = d_inode(old_dentry);
2b0143b5c986b (David Howells 2015-03-17 22:25:59 +0000 251) struct inode *new_inode = d_inode(new_dentry);
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 252) struct page *dir_page = NULL;
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 253) struct ufs_dir_entry * dir_de = NULL;
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 254) struct page *old_page;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 255) struct ufs_dir_entry *old_de;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 256) int err = -ENOENT;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 257)
f03b8ad8d3863 (Miklos Szeredi 2016-09-27 11:03:57 +0200 258) if (flags & ~RENAME_NOREPLACE)
f03b8ad8d3863 (Miklos Szeredi 2016-09-27 11:03:57 +0200 259) return -EINVAL;
f03b8ad8d3863 (Miklos Szeredi 2016-09-27 11:03:57 +0200 260)
080497079c0ba (Alexey Dobriyan 2009-12-15 16:46:50 -0800 261) old_de = ufs_find_entry(old_dir, &old_dentry->d_name, &old_page);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 262) if (!old_de)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 263) goto out;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 264)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 265) if (S_ISDIR(old_inode->i_mode)) {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 266) err = -EIO;
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 267) dir_de = ufs_dotdot(old_inode, &dir_page);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 268) if (!dir_de)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 269) goto out_old;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 270) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 271)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 272) if (new_inode) {
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 273) struct page *new_page;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 274) struct ufs_dir_entry *new_de;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 275)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 276) err = -ENOTEMPTY;
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 277) if (dir_de && !ufs_empty_dir(new_inode))
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 278) goto out_dir;
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 279)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 280) err = -ENOENT;
080497079c0ba (Alexey Dobriyan 2009-12-15 16:46:50 -0800 281) new_de = ufs_find_entry(new_dir, &new_dentry->d_name, &new_page);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 282) if (!new_de)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 283) goto out_dir;
70d45cdb66439 (Al Viro 2015-06-16 01:56:23 -0400 284) ufs_set_link(new_dir, new_de, new_page, old_inode, 1);
02027d42c3f74 (Deepa Dinamani 2016-09-14 07:48:05 -0700 285) new_inode->i_ctime = current_time(new_inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 286) if (dir_de)
9a53c3a783c2f (Dave Hansen 2006-09-30 23:29:03 -0700 287) drop_nlink(new_inode);
3257545e40a76 (Alexey Dobriyan 2006-03-23 03:00:53 -0800 288) inode_dec_link_count(new_inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 289) } else {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 290) err = ufs_add_link(new_dentry, old_inode);
37750cdda3672 (Al Viro 2011-03-02 09:40:21 -0500 291) if (err)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 292) goto out_dir;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 293) if (dir_de)
3257545e40a76 (Alexey Dobriyan 2006-03-23 03:00:53 -0800 294) inode_inc_link_count(new_dir);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 295) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 296)
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 297) /*
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 298) * Like most other Unix systems, set the ctime for inodes on a
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 299) * rename.
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 300) */
02027d42c3f74 (Deepa Dinamani 2016-09-14 07:48:05 -0700 301) old_inode->i_ctime = current_time(old_inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 302)
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 303) ufs_delete_entry(old_dir, old_de, old_page);
37750cdda3672 (Al Viro 2011-03-02 09:40:21 -0500 304) mark_inode_dirty(old_inode);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 305)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 306) if (dir_de) {
70d45cdb66439 (Al Viro 2015-06-16 01:56:23 -0400 307) if (old_dir != new_dir)
70d45cdb66439 (Al Viro 2015-06-16 01:56:23 -0400 308) ufs_set_link(old_inode, dir_de, dir_page, new_dir, 0);
70d45cdb66439 (Al Viro 2015-06-16 01:56:23 -0400 309) else {
70d45cdb66439 (Al Viro 2015-06-16 01:56:23 -0400 310) kunmap(dir_page);
09cbfeaf1a5a6 (Kirill A. Shutemov 2016-04-01 15:29:47 +0300 311) put_page(dir_page);
70d45cdb66439 (Al Viro 2015-06-16 01:56:23 -0400 312) }
3257545e40a76 (Alexey Dobriyan 2006-03-23 03:00:53 -0800 313) inode_dec_link_count(old_dir);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 314) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 315) return 0;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 316)
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 317)
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 318) out_dir:
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 319) if (dir_de) {
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 320) kunmap(dir_page);
09cbfeaf1a5a6 (Kirill A. Shutemov 2016-04-01 15:29:47 +0300 321) put_page(dir_page);
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 322) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 323) out_old:
b71034e5e67d1 (Evgeniy Dushistov 2006-06-25 05:47:22 -0700 324) kunmap(old_page);
09cbfeaf1a5a6 (Kirill A. Shutemov 2016-04-01 15:29:47 +0300 325) put_page(old_page);
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 326) out:
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 327) return err;
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 328) }
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 329)
c5ef1c42c51b1 (Arjan van de Ven 2007-02-12 00:55:40 -0800 330) const struct inode_operations ufs_dir_inode_operations = {
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 331) .create = ufs_create,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 332) .lookup = ufs_lookup,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 333) .link = ufs_link,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 334) .unlink = ufs_unlink,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 335) .symlink = ufs_symlink,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 336) .mkdir = ufs_mkdir,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 337) .rmdir = ufs_rmdir,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 338) .mknod = ufs_mknod,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 339) .rename = ufs_rename,
^1da177e4c3f4 (Linus Torvalds 2005-04-16 15:20:36 -0700 340) };
VisionFive2 Linux kernel
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