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/affs/namei.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *  (c) 1996  Hans-Joachim Widmaier - Rewritten
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *  (C) 1993  Ray Burr - Modified for Amiga FFS filesystem.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *  (C) 1991  Linus Torvalds - minix filesystem
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include "affs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/exportfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) typedef int (*toupper_t)(int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) /* Simple toupper() for DOS\1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) affs_toupper(int ch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	return ch >= 'a' && ch <= 'z' ? ch -= ('a' - 'A') : ch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) /* International toupper() for DOS\3 ("international") */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) affs_intl_toupper(int ch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	return (ch >= 'a' && ch <= 'z') || (ch >= 0xE0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 		&& ch <= 0xFE && ch != 0xF7) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 		ch - ('a' - 'A') : ch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) static inline toupper_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) affs_get_toupper(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	return affs_test_opt(AFFS_SB(sb)->s_flags, SF_INTL) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	       affs_intl_toupper : affs_toupper;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  * Note: the dentry argument is the parent dentry.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) static inline int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) __affs_hash_dentry(const struct dentry *dentry, struct qstr *qstr, toupper_t toupper, bool notruncate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	const u8 *name = qstr->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	unsigned long hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	u32 len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	retval = affs_check_name(qstr->name, qstr->len, notruncate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 		return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	hash = init_name_hash(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	len = min(qstr->len, AFFSNAMEMAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	for (; len > 0; name++, len--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		hash = partial_name_hash(toupper(*name), hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	qstr->hash = end_name_hash(hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) affs_hash_dentry(const struct dentry *dentry, struct qstr *qstr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	return __affs_hash_dentry(dentry, qstr, affs_toupper,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 				  affs_nofilenametruncate(dentry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) affs_intl_hash_dentry(const struct dentry *dentry, struct qstr *qstr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	return __affs_hash_dentry(dentry, qstr, affs_intl_toupper,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 				  affs_nofilenametruncate(dentry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) static inline int __affs_compare_dentry(unsigned int len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		const char *str, const struct qstr *name, toupper_t toupper,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		bool notruncate)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	const u8 *aname = str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	const u8 *bname = name->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	 * 'str' is the name of an already existing dentry, so the name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	 * must be valid. 'name' must be validated first.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	if (affs_check_name(name->name, name->len, notruncate))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	 * If the names are longer than the allowed 30 chars,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	 * the excess is ignored, so their length may differ.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	if (len >= AFFSNAMEMAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		if (name->len < AFFSNAMEMAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 			return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		len = AFFSNAMEMAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	} else if (len != name->len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	for (; len > 0; len--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		if (toupper(*aname++) != toupper(*bname++))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 			return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) affs_compare_dentry(const struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		unsigned int len, const char *str, const struct qstr *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	return __affs_compare_dentry(len, str, name, affs_toupper,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 				     affs_nofilenametruncate(dentry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) affs_intl_compare_dentry(const struct dentry *dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		unsigned int len, const char *str, const struct qstr *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	return __affs_compare_dentry(len, str, name, affs_intl_toupper,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 				     affs_nofilenametruncate(dentry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)  * NOTE! unlike strncmp, affs_match returns 1 for success, 0 for failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) static inline int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) affs_match(struct dentry *dentry, const u8 *name2, toupper_t toupper)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	const u8 *name = dentry->d_name.name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	int len = dentry->d_name.len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	if (len >= AFFSNAMEMAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		if (*name2 < AFFSNAMEMAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		len = AFFSNAMEMAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	} else if (len != *name2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	for (name2++; len > 0; len--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		if (toupper(*name++) != toupper(*name2++))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 			return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) affs_hash_name(struct super_block *sb, const u8 *name, unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	toupper_t toupper = affs_get_toupper(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	u32 hash;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	hash = len = min(len, AFFSNAMEMAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	for (; len > 0; len--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		hash = (hash * 13 + toupper(*name++)) & 0x7ff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	return hash % AFFS_SB(sb)->s_hashsize;
^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 struct buffer_head *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) affs_find_entry(struct inode *dir, struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	struct super_block *sb = dir->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	toupper_t toupper = affs_get_toupper(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	u32 key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	pr_debug("%s(\"%pd\")\n", __func__, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	bh = affs_bread(sb, dir->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	if (!bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		return ERR_PTR(-EIO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	key = be32_to_cpu(AFFS_HEAD(bh)->table[affs_hash_name(sb, dentry->d_name.name, dentry->d_name.len)]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	for (;;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		affs_brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		if (key == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 			return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		bh = affs_bread(sb, key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		if (!bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 			return ERR_PTR(-EIO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		if (affs_match(dentry, AFFS_TAIL(sb, bh)->name, toupper))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 			return bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		key = be32_to_cpu(AFFS_TAIL(sb, bh)->hash_chain);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) struct dentry *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) affs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	struct super_block *sb = dir->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	struct inode *inode = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	struct dentry *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	pr_debug("%s(\"%pd\")\n", __func__, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	affs_lock_dir(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	bh = affs_find_entry(dir, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	if (IS_ERR(bh)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		affs_unlock_dir(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		return ERR_CAST(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	if (bh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		u32 ino = bh->b_blocknr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		/* store the real header ino in d_fsdata for faster lookups */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		dentry->d_fsdata = (void *)(long)ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		switch (be32_to_cpu(AFFS_TAIL(sb, bh)->stype)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		//link to dirs disabled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		//case ST_LINKDIR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		case ST_LINKFILE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 			ino = be32_to_cpu(AFFS_TAIL(sb, bh)->original);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		affs_brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		inode = affs_iget(sb, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	res = d_splice_alias(inode, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	if (!IS_ERR_OR_NULL(res))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		res->d_fsdata = dentry->d_fsdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	affs_unlock_dir(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) affs_unlink(struct inode *dir, struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	pr_debug("%s(dir=%lu, %lu \"%pd\")\n", __func__, dir->i_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 		 d_inode(dentry)->i_ino, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	return affs_remove_header(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) affs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	struct super_block *sb = dir->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	struct inode	*inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	int		 error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	pr_debug("%s(%lu,\"%pd\",0%ho)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		 __func__, dir->i_ino, dentry, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	inode = affs_new_inode(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	if (!inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 		return -ENOSPC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	inode->i_mode = mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	affs_mode_to_prot(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	inode->i_op = &affs_file_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	inode->i_fop = &affs_file_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	inode->i_mapping->a_ops = affs_test_opt(AFFS_SB(sb)->s_flags, SF_OFS) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 				  &affs_aops_ofs : &affs_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	error = affs_add_entry(dir, inode, dentry, ST_FILE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		clear_nlink(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) affs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	struct inode		*inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	int			 error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	pr_debug("%s(%lu,\"%pd\",0%ho)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		 __func__, dir->i_ino, dentry, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	inode = affs_new_inode(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	if (!inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		return -ENOSPC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	inode->i_mode = S_IFDIR | mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	affs_mode_to_prot(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	inode->i_op = &affs_dir_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	inode->i_fop = &affs_dir_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	error = affs_add_entry(dir, inode, dentry, ST_USERDIR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 		clear_nlink(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 		mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 		iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) affs_rmdir(struct inode *dir, struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	pr_debug("%s(dir=%lu, %lu \"%pd\")\n", __func__, dir->i_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 		 d_inode(dentry)->i_ino, dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	return affs_remove_header(dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) affs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	struct super_block	*sb = dir->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	struct buffer_head	*bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	struct inode		*inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	char			*p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	int			 i, maxlen, error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	char			 c, lc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	pr_debug("%s(%lu,\"%pd\" -> \"%s\")\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 		 __func__, dir->i_ino, dentry, symname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	maxlen = AFFS_SB(sb)->s_hashsize * sizeof(u32) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	inode  = affs_new_inode(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	if (!inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 		return -ENOSPC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	inode->i_op = &affs_symlink_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	inode_nohighmem(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	inode->i_data.a_ops = &affs_symlink_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	inode->i_mode = S_IFLNK | 0777;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	affs_mode_to_prot(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	error = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	bh = affs_bread(sb, inode->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	if (!bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	i  = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	p  = (char *)AFFS_HEAD(bh)->table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	lc = '/';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	if (*symname == '/') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 		struct affs_sb_info *sbi = AFFS_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 		while (*symname == '/')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 			symname++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 		spin_lock(&sbi->symlink_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 		while (sbi->s_volume[i])	/* Cannot overflow */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 			*p++ = sbi->s_volume[i++];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 		spin_unlock(&sbi->symlink_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	while (i < maxlen && (c = *symname++)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 		if (c == '.' && lc == '/' && *symname == '.' && symname[1] == '/') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 			*p++ = '/';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 			i++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 			symname += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 			lc = '/';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 		} else if (c == '.' && lc == '/' && *symname == '/') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 			symname++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 			lc = '/';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 			*p++ = c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 			lc   = c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 			i++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 		if (lc == '/')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 			while (*symname == '/')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 				symname++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 	*p = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	inode->i_size = i + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 	mark_buffer_dirty_inode(bh, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 	affs_brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 	mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	error = affs_add_entry(dir, inode, dentry, ST_SOFTLINK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 	clear_nlink(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 	mark_inode_dirty(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 	iput(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 	return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) affs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 	struct inode *inode = d_inode(old_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 	pr_debug("%s(%lu, %lu, \"%pd\")\n", __func__, inode->i_ino, dir->i_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 		 dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 	return affs_add_entry(dir, inode, dentry, ST_LINKFILE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) affs_rename(struct inode *old_dir, struct dentry *old_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 	    struct inode *new_dir, struct dentry *new_dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 	struct super_block *sb = old_dir->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 	struct buffer_head *bh = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 	int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 	retval = affs_check_name(new_dentry->d_name.name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 				 new_dentry->d_name.len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 				 affs_nofilenametruncate(old_dentry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 	if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 		return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 	/* Unlink destination if it already exists */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 	if (d_really_is_positive(new_dentry)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 		retval = affs_remove_header(new_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 		if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 			return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 	bh = affs_bread(sb, d_inode(old_dentry)->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 	if (!bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 	/* Remove header from its parent directory. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 	affs_lock_dir(old_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 	retval = affs_remove_hash(old_dir, bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 	affs_unlock_dir(old_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 	if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 		goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 	/* And insert it into the new directory with the new name. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 	affs_copy_name(AFFS_TAIL(sb, bh)->name, new_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 	affs_fix_checksum(sb, bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 	affs_lock_dir(new_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) 	retval = affs_insert_hash(new_dir, bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 	affs_unlock_dir(new_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 	/* TODO: move it back to old_dir, if error? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 	mark_buffer_dirty_inode(bh, retval ? old_dir : new_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 	affs_brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 	return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) affs_xrename(struct inode *old_dir, struct dentry *old_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 	     struct inode *new_dir, struct dentry *new_dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) 	struct super_block *sb = old_dir->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 	struct buffer_head *bh_old = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) 	struct buffer_head *bh_new = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) 	int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) 	bh_old = affs_bread(sb, d_inode(old_dentry)->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) 	if (!bh_old)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 	bh_new = affs_bread(sb, d_inode(new_dentry)->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) 	if (!bh_new) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 		affs_brelse(bh_old);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) 	/* Remove old header from its parent directory. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) 	affs_lock_dir(old_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) 	retval = affs_remove_hash(old_dir, bh_old);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) 	affs_unlock_dir(old_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) 	if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) 		goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) 	/* Remove new header from its parent directory. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) 	affs_lock_dir(new_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) 	retval = affs_remove_hash(new_dir, bh_new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) 	affs_unlock_dir(new_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) 	if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) 		goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) 	/* Insert old into the new directory with the new name. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) 	affs_copy_name(AFFS_TAIL(sb, bh_old)->name, new_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) 	affs_fix_checksum(sb, bh_old);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) 	affs_lock_dir(new_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) 	retval = affs_insert_hash(new_dir, bh_old);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) 	affs_unlock_dir(new_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) 	/* Insert new into the old directory with the old name. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) 	affs_copy_name(AFFS_TAIL(sb, bh_new)->name, old_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) 	affs_fix_checksum(sb, bh_new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) 	affs_lock_dir(old_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) 	retval = affs_insert_hash(old_dir, bh_new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) 	affs_unlock_dir(old_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) 	mark_buffer_dirty_inode(bh_old, new_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) 	mark_buffer_dirty_inode(bh_new, old_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) 	affs_brelse(bh_old);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) 	affs_brelse(bh_new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) 	return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) int affs_rename2(struct inode *old_dir, struct dentry *old_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) 			struct inode *new_dir, struct dentry *new_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) 			unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) 	if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) 	pr_debug("%s(old=%lu,\"%pd\" to new=%lu,\"%pd\")\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) 		 old_dir->i_ino, old_dentry, new_dir->i_ino, new_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) 	if (flags & RENAME_EXCHANGE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) 		return affs_xrename(old_dir, old_dentry, new_dir, new_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) 	return affs_rename(old_dir, old_dentry, new_dir, new_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) static struct dentry *affs_get_parent(struct dentry *child)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) 	struct inode *parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) 	struct buffer_head *bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) 	bh = affs_bread(child->d_sb, d_inode(child)->i_ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) 	if (!bh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) 		return ERR_PTR(-EIO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) 	parent = affs_iget(child->d_sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) 			   be32_to_cpu(AFFS_TAIL(child->d_sb, bh)->parent));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) 	brelse(bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) 	if (IS_ERR(parent))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) 		return ERR_CAST(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) 	return d_obtain_alias(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) static struct inode *affs_nfs_get_inode(struct super_block *sb, u64 ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) 					u32 generation)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) 	struct inode *inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) 	if (!affs_validblock(sb, ino))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) 		return ERR_PTR(-ESTALE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) 	inode = affs_iget(sb, ino);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) 	if (IS_ERR(inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) 		return ERR_CAST(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) 	return inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) static struct dentry *affs_fh_to_dentry(struct super_block *sb, struct fid *fid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) 					int fh_len, int fh_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) 	return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) 				    affs_nfs_get_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) static struct dentry *affs_fh_to_parent(struct super_block *sb, struct fid *fid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) 					int fh_len, int fh_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) 	return generic_fh_to_parent(sb, fid, fh_len, fh_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) 				    affs_nfs_get_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) const struct export_operations affs_export_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) 	.fh_to_dentry = affs_fh_to_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) 	.fh_to_parent = affs_fh_to_parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) 	.get_parent = affs_get_parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) const struct dentry_operations affs_dentry_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) 	.d_hash		= affs_hash_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) 	.d_compare	= affs_compare_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) const struct dentry_operations affs_intl_dentry_operations = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) 	.d_hash		= affs_intl_hash_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) 	.d_compare	= affs_intl_compare_dentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) };