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/ext4/acl.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/quotaops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include "ext4_jbd2.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include "ext4.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include "xattr.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include "acl.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * Convert from filesystem to in-memory representation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) static struct posix_acl *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) ext4_acl_from_disk(const void *value, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	const char *end = (char *)value + size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	int n, count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	struct posix_acl *acl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	if (!value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	if (size < sizeof(ext4_acl_header))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 		 return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	if (((ext4_acl_header *)value)->a_version !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	    cpu_to_le32(EXT4_ACL_VERSION))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 		return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	value = (char *)value + sizeof(ext4_acl_header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	count = ext4_acl_count(size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	if (count < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 		return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	if (count == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	acl = posix_acl_alloc(count, GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	if (!acl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 		return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	for (n = 0; n < count; n++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 		ext4_acl_entry *entry =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 			(ext4_acl_entry *)value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 		if ((char *)value + sizeof(ext4_acl_entry_short) > end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 			goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		acl->a_entries[n].e_tag  = le16_to_cpu(entry->e_tag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 		acl->a_entries[n].e_perm = le16_to_cpu(entry->e_perm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		switch (acl->a_entries[n].e_tag) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		case ACL_USER_OBJ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		case ACL_GROUP_OBJ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		case ACL_MASK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 		case ACL_OTHER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 			value = (char *)value +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 				sizeof(ext4_acl_entry_short);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 		case ACL_USER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 			value = (char *)value + sizeof(ext4_acl_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 			if ((char *)value > end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 				goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 			acl->a_entries[n].e_uid =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 				make_kuid(&init_user_ns,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 					  le32_to_cpu(entry->e_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		case ACL_GROUP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 			value = (char *)value + sizeof(ext4_acl_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 			if ((char *)value > end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 				goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 			acl->a_entries[n].e_gid =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 				make_kgid(&init_user_ns,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 					  le32_to_cpu(entry->e_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 			goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	if (value != end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	return acl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	posix_acl_release(acl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88)  * Convert from in-memory to filesystem representation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) static void *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) ext4_acl_to_disk(const struct posix_acl *acl, size_t *size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	ext4_acl_header *ext_acl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	char *e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	size_t n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	*size = ext4_acl_size(acl->a_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	ext_acl = kmalloc(sizeof(ext4_acl_header) + acl->a_count *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 			sizeof(ext4_acl_entry), GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	if (!ext_acl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	ext_acl->a_version = cpu_to_le32(EXT4_ACL_VERSION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	e = (char *)ext_acl + sizeof(ext4_acl_header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	for (n = 0; n < acl->a_count; n++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		const struct posix_acl_entry *acl_e = &acl->a_entries[n];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		ext4_acl_entry *entry = (ext4_acl_entry *)e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		entry->e_tag  = cpu_to_le16(acl_e->e_tag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		entry->e_perm = cpu_to_le16(acl_e->e_perm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		switch (acl_e->e_tag) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		case ACL_USER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 			entry->e_id = cpu_to_le32(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 				from_kuid(&init_user_ns, acl_e->e_uid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 			e += sizeof(ext4_acl_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		case ACL_GROUP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 			entry->e_id = cpu_to_le32(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 				from_kgid(&init_user_ns, acl_e->e_gid));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 			e += sizeof(ext4_acl_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		case ACL_USER_OBJ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		case ACL_GROUP_OBJ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		case ACL_MASK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		case ACL_OTHER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 			e += sizeof(ext4_acl_entry_short);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 			goto fail;
^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) 	return (char *)ext_acl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	kfree(ext_acl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)  * Inode operation get_posix_acl().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)  * inode->i_mutex: don't care
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) struct posix_acl *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) ext4_get_acl(struct inode *inode, int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	int name_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	char *value = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	struct posix_acl *acl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	case ACL_TYPE_ACCESS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		name_index = EXT4_XATTR_INDEX_POSIX_ACL_ACCESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	case ACL_TYPE_DEFAULT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		name_index = EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		BUG();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	retval = ext4_xattr_get(inode, name_index, "", NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	if (retval > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		value = kmalloc(retval, GFP_NOFS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		if (!value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 			return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		retval = ext4_xattr_get(inode, name_index, "", value, retval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	if (retval > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		acl = ext4_acl_from_disk(value, retval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	else if (retval == -ENODATA || retval == -ENOSYS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		acl = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		acl = ERR_PTR(retval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	kfree(value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	return acl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)  * Set the access or default ACL of an inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)  * inode->i_mutex: down unless called from ext4_new_inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) __ext4_set_acl(handle_t *handle, struct inode *inode, int type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	     struct posix_acl *acl, int xattr_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	int name_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	void *value = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	size_t size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	case ACL_TYPE_ACCESS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		name_index = EXT4_XATTR_INDEX_POSIX_ACL_ACCESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	case ACL_TYPE_DEFAULT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		name_index = EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		if (!S_ISDIR(inode->i_mode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 			return acl ? -EACCES : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	if (acl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		value = ext4_acl_to_disk(acl, &size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		if (IS_ERR(value))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 			return (int)PTR_ERR(value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	error = ext4_xattr_set_handle(handle, inode, name_index, "",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 				      value, size, xattr_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	kfree(value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	if (!error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		set_cached_acl(inode, type, acl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) ext4_set_acl(struct inode *inode, struct posix_acl *acl, int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	handle_t *handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	int error, credits, retries = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	size_t acl_size = acl ? ext4_acl_size(acl->a_count) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	umode_t mode = inode->i_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	int update_mode = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	error = dquot_initialize(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) retry:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	error = ext4_xattr_set_credits(inode, acl_size, false /* is_create */,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 				       &credits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	handle = ext4_journal_start(inode, EXT4_HT_XATTR, credits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	if (IS_ERR(handle))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		return PTR_ERR(handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	ext4_fc_start_update(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	if ((type == ACL_TYPE_ACCESS) && acl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		error = posix_acl_update_mode(inode, &mode, &acl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 			goto out_stop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 		if (mode != inode->i_mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 			update_mode = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	error = __ext4_set_acl(handle, inode, type, acl, 0 /* xattr_flags */);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	if (!error && update_mode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		inode->i_mode = mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 		inode->i_ctime = current_time(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		error = ext4_mark_inode_dirty(handle, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) out_stop:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	ext4_journal_stop(handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	ext4_fc_stop_update(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	if (error == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		goto retry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)  * Initialize the ACLs of a new inode. Called from ext4_new_inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)  * dir->i_mutex: down
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)  * inode->i_mutex: up (access to inode is still exclusive)
^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) ext4_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	struct posix_acl *default_acl, *acl;
^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) 	error = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	if (default_acl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		error = __ext4_set_acl(handle, inode, ACL_TYPE_DEFAULT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 				       default_acl, XATTR_CREATE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		posix_acl_release(default_acl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 		inode->i_default_acl = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	if (acl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 		if (!error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 			error = __ext4_set_acl(handle, inode, ACL_TYPE_ACCESS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 					       acl, XATTR_CREATE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 		posix_acl_release(acl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 		inode->i_acl = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }