Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  * JFFS2 -- Journalling Flash File System, Version 2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright © 2006  NEC Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * For licensing information, see the file 'LICENCE' in this directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *
^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) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/time.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/crc32.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/jffs2.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/xattr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/posix_acl_xattr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/mtd/mtd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include "nodelist.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) static size_t jffs2_acl_size(int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	if (count <= 4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 		return sizeof(struct jffs2_acl_header)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 		       + count * sizeof(struct jffs2_acl_entry_short);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 		return sizeof(struct jffs2_acl_header)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 		       + 4 * sizeof(struct jffs2_acl_entry_short)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 		       + (count - 4) * sizeof(struct jffs2_acl_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) static int jffs2_acl_count(size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	size_t s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	size -= sizeof(struct jffs2_acl_header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	if (size < 4 * sizeof(struct jffs2_acl_entry_short)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		if (size % sizeof(struct jffs2_acl_entry_short))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 			return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 		return size / sizeof(struct jffs2_acl_entry_short);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		s = size - 4 * sizeof(struct jffs2_acl_entry_short);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		if (s % sizeof(struct jffs2_acl_entry))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 			return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		return s / sizeof(struct jffs2_acl_entry) + 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) static struct posix_acl *jffs2_acl_from_medium(void *value, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	void *end = value + size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	struct jffs2_acl_header *header = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	struct jffs2_acl_entry *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	struct posix_acl *acl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	uint32_t ver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	int i, count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	if (!value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	if (size < sizeof(struct jffs2_acl_header))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	ver = je32_to_cpu(header->a_version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	if (ver != JFFS2_ACL_VERSION) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		JFFS2_WARNING("Invalid ACL version. (=%u)\n", ver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		return ERR_PTR(-EINVAL);
^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) 	value += sizeof(struct jffs2_acl_header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	count = jffs2_acl_count(size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	if (count < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	if (count == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	acl = posix_acl_alloc(count, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	if (!acl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	for (i=0; i < count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		entry = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		if (value + sizeof(struct jffs2_acl_entry_short) > end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 			goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		acl->a_entries[i].e_tag = je16_to_cpu(entry->e_tag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		acl->a_entries[i].e_perm = je16_to_cpu(entry->e_perm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		switch (acl->a_entries[i].e_tag) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 			case ACL_USER_OBJ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 			case ACL_GROUP_OBJ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 			case ACL_MASK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 			case ACL_OTHER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 				value += sizeof(struct jffs2_acl_entry_short);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 			case ACL_USER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 				value += sizeof(struct jffs2_acl_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 				if (value > end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 					goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 				acl->a_entries[i].e_uid =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 					make_kuid(&init_user_ns,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 						  je32_to_cpu(entry->e_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 			case ACL_GROUP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 				value += sizeof(struct jffs2_acl_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 				if (value > end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 					goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 				acl->a_entries[i].e_gid =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 					make_kgid(&init_user_ns,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 						  je32_to_cpu(entry->e_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 			default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 				goto fail;
^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) 	if (value != end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	return acl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)  fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	posix_acl_release(acl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) static void *jffs2_acl_to_medium(const struct posix_acl *acl, size_t *size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	struct jffs2_acl_header *header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	struct jffs2_acl_entry *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	void *e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	size_t i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	*size = jffs2_acl_size(acl->a_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	header = kmalloc(struct_size(header, a_entries, acl->a_count),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 			GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	if (!header)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	header->a_version = cpu_to_je32(JFFS2_ACL_VERSION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	e = header + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	for (i=0; i < acl->a_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		const struct posix_acl_entry *acl_e = &acl->a_entries[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		entry = e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		entry->e_tag = cpu_to_je16(acl_e->e_tag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		entry->e_perm = cpu_to_je16(acl_e->e_perm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		switch(acl_e->e_tag) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 			case ACL_USER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 				entry->e_id = cpu_to_je32(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 					from_kuid(&init_user_ns, acl_e->e_uid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 				e += sizeof(struct jffs2_acl_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 			case ACL_GROUP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 				entry->e_id = cpu_to_je32(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 					from_kgid(&init_user_ns, acl_e->e_gid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 				e += sizeof(struct jffs2_acl_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 			case ACL_USER_OBJ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 			case ACL_GROUP_OBJ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 			case ACL_MASK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 			case ACL_OTHER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 				e += sizeof(struct jffs2_acl_entry_short);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 			default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 				goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	return header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)  fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	kfree(header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) struct posix_acl *jffs2_get_acl(struct inode *inode, int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	struct posix_acl *acl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	char *value = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	int rc, xprefix;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	case ACL_TYPE_ACCESS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		xprefix = JFFS2_XPREFIX_ACL_ACCESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	case ACL_TYPE_DEFAULT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		xprefix = JFFS2_XPREFIX_ACL_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	rc = do_jffs2_getxattr(inode, xprefix, "", NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	if (rc > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		value = kmalloc(rc, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		if (!value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 			return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		rc = do_jffs2_getxattr(inode, xprefix, "", value, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	if (rc > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		acl = jffs2_acl_from_medium(value, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	} else if (rc == -ENODATA || rc == -ENOSYS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		acl = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		acl = ERR_PTR(rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	kfree(value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	return acl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) static int __jffs2_set_acl(struct inode *inode, int xprefix, struct posix_acl *acl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	char *value = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	size_t size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	if (acl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		value = jffs2_acl_to_medium(acl, &size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		if (IS_ERR(value))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 			return PTR_ERR(value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	rc = do_jffs2_setxattr(inode, xprefix, "", value, size, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	if (!value && rc == -ENODATA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	kfree(value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) int jffs2_set_acl(struct inode *inode, struct posix_acl *acl, int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	int rc, xprefix;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	case ACL_TYPE_ACCESS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		xprefix = JFFS2_XPREFIX_ACL_ACCESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		if (acl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 			umode_t mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 			rc = posix_acl_update_mode(inode, &mode, &acl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 			if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 				return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 			if (inode->i_mode != mode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 				struct iattr attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 				attr.ia_valid = ATTR_MODE | ATTR_CTIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 				attr.ia_mode = mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 				attr.ia_ctime = current_time(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 				rc = jffs2_do_setattr(inode, &attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 				if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 					return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	case ACL_TYPE_DEFAULT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 		xprefix = JFFS2_XPREFIX_ACL_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 		if (!S_ISDIR(inode->i_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 			return acl ? -EACCES : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	rc = __jffs2_set_acl(inode, xprefix, acl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	if (!rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		set_cached_acl(inode, type, acl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, umode_t *i_mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	struct posix_acl *default_acl, *acl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	cache_no_acl(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	rc = posix_acl_create(dir_i, i_mode, &default_acl, &acl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 		return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	if (default_acl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		set_cached_acl(inode, ACL_TYPE_DEFAULT, default_acl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		posix_acl_release(default_acl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	if (acl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		posix_acl_release(acl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) int jffs2_init_acl_post(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	if (inode->i_default_acl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 		rc = __jffs2_set_acl(inode, JFFS2_XPREFIX_ACL_DEFAULT, inode->i_default_acl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 		if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 			return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	if (inode->i_acl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		rc = __jffs2_set_acl(inode, JFFS2_XPREFIX_ACL_ACCESS, inode->i_acl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 			return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) }