Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *  linux/fs/sysv/namei.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *  minix/namei.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *  Copyright (C) 1991, 1992  Linus Torvalds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *  coh/namei.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *  Copyright (C) 1993  Pascal Haible, Bruno Haible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  *  sysv/namei.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  *  Copyright (C) 1993  Bruno Haible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  *  Copyright (C) 1997, 1998  Krzysztof G. Baranowski
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include "sysv.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) static int add_nondir(struct dentry *dentry, struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	int err = sysv_add_link(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	if (!err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 		d_instantiate(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	inode_dec_link_count(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) static struct dentry *sysv_lookup(struct inode * dir, struct dentry * dentry, unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	struct inode * inode = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	ino_t ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	if (dentry->d_name.len > SYSV_NAMELEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 		return ERR_PTR(-ENAMETOOLONG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	ino = sysv_inode_by_name(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	if (ino)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 		inode = sysv_iget(dir->i_sb, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	return d_splice_alias(inode, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) static int sysv_mknod(struct inode * dir, struct dentry * dentry, umode_t mode, dev_t rdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	struct inode * inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	if (!old_valid_dev(rdev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	inode = sysv_new_inode(dir, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	err = PTR_ERR(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	if (!IS_ERR(inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		sysv_set_inode(inode, rdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 		mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		err = add_nondir(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) static int sysv_create(struct inode * dir, struct dentry * dentry, umode_t mode, bool excl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	return sysv_mknod(dir, dentry, mode, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) static int sysv_symlink(struct inode * dir, struct dentry * dentry, 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	const char * symname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	int err = -ENAMETOOLONG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	int l = strlen(symname)+1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	struct inode * inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	if (l > dir->i_sb->s_blocksize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	inode = sysv_new_inode(dir, S_IFLNK|0777);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	err = PTR_ERR(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	if (IS_ERR(inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	sysv_set_inode(inode, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	err = page_symlink(inode, symname, l);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		goto out_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	err = add_nondir(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) out_fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	inode_dec_link_count(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) static int sysv_link(struct dentry * old_dentry, struct inode * dir, 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	struct dentry * dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	struct inode *inode = d_inode(old_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	inode->i_ctime = current_time(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	inode_inc_link_count(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	ihold(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	return add_nondir(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static int sysv_mkdir(struct inode * dir, struct dentry *dentry, umode_t mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	struct inode * inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	inode_inc_link_count(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	inode = sysv_new_inode(dir, S_IFDIR|mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	err = PTR_ERR(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	if (IS_ERR(inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		goto out_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	sysv_set_inode(inode, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	inode_inc_link_count(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	err = sysv_make_empty(inode, dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		goto out_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	err = sysv_add_link(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		goto out_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)         d_instantiate(dentry, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) out_fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	inode_dec_link_count(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	inode_dec_link_count(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) out_dir:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	inode_dec_link_count(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) static int sysv_unlink(struct inode * dir, struct dentry * dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	struct inode * inode = d_inode(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	struct page * page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	struct sysv_dir_entry * de;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	int err = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	de = sysv_find_entry(dentry, &page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	if (!de)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	err = sysv_delete_entry (de, page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	inode->i_ctime = dir->i_ctime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	inode_dec_link_count(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) static int sysv_rmdir(struct inode * dir, struct dentry * dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	struct inode *inode = d_inode(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	int err = -ENOTEMPTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	if (sysv_empty_dir(inode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		err = sysv_unlink(dir, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		if (!err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 			inode->i_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 			inode_dec_link_count(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 			inode_dec_link_count(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)  * Anybody can rename anything with this: the permission checks are left to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)  * higher-level routines.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) static int sysv_rename(struct inode * old_dir, struct dentry * old_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		       struct inode * new_dir, struct dentry * new_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		       unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	struct inode * old_inode = d_inode(old_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	struct inode * new_inode = d_inode(new_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	struct page * dir_page = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	struct sysv_dir_entry * dir_de = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	struct page * old_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	struct sysv_dir_entry * old_de;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	int err = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	if (flags & ~RENAME_NOREPLACE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	old_de = sysv_find_entry(old_dentry, &old_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	if (!old_de)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	if (S_ISDIR(old_inode->i_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		err = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		dir_de = sysv_dotdot(old_inode, &dir_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		if (!dir_de)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 			goto out_old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	if (new_inode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		struct page * new_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		struct sysv_dir_entry * new_de;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		err = -ENOTEMPTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		if (dir_de && !sysv_empty_dir(new_inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 			goto out_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		err = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		new_de = sysv_find_entry(new_dentry, &new_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		if (!new_de)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 			goto out_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		sysv_set_link(new_de, new_page, old_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		new_inode->i_ctime = current_time(new_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 		if (dir_de)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 			drop_nlink(new_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		inode_dec_link_count(new_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		err = sysv_add_link(new_dentry, old_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 			goto out_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		if (dir_de)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 			inode_inc_link_count(new_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	sysv_delete_entry(old_de, old_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	mark_inode_dirty(old_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	if (dir_de) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		sysv_set_link(dir_de, dir_page, new_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		inode_dec_link_count(old_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) out_dir:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	if (dir_de) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 		kunmap(dir_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		put_page(dir_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) out_old:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	kunmap(old_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	put_page(old_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)  * directories can handle most operations...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) const struct inode_operations sysv_dir_inode_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	.create		= sysv_create,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	.lookup		= sysv_lookup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	.link		= sysv_link,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	.unlink		= sysv_unlink,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	.symlink	= sysv_symlink,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	.mkdir		= sysv_mkdir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	.rmdir		= sysv_rmdir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	.mknod		= sysv_mknod,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	.rename		= sysv_rename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	.getattr	= sysv_getattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) };