^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Squashfs - a compressed read only filesystem for Linux
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2010
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Phillip Lougher <phillip@squashfs.org.uk>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * xattr.c
^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) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/vfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/xattr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "squashfs_fs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "squashfs_fs_sb.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include "squashfs_fs_i.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include "squashfs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static const struct xattr_handler *squashfs_xattr_handler(int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) ssize_t squashfs_listxattr(struct dentry *d, char *buffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) size_t buffer_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct inode *inode = d_inode(d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct super_block *sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct squashfs_sb_info *msblk = sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) u64 start = SQUASHFS_XATTR_BLK(squashfs_i(inode)->xattr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) + msblk->xattr_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) int offset = SQUASHFS_XATTR_OFFSET(squashfs_i(inode)->xattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) int count = squashfs_i(inode)->xattr_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) size_t rest = buffer_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) /* check that the file system has xattrs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) if (msblk->xattr_id_table == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) /* loop reading each xattr name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) while (count--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct squashfs_xattr_entry entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct squashfs_xattr_val val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) const struct xattr_handler *handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) int name_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) err = squashfs_read_metadata(sb, &entry, &start, &offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) sizeof(entry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) name_size = le16_to_cpu(entry.size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) handler = squashfs_xattr_handler(le16_to_cpu(entry.type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (handler && (!handler->list || handler->list(d))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) const char *prefix = handler->prefix ?: handler->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) size_t prefix_size = strlen(prefix);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if (buffer) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (prefix_size + name_size + 1 > rest) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) err = -ERANGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) memcpy(buffer, prefix, prefix_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) buffer += prefix_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) err = squashfs_read_metadata(sb, buffer, &start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) &offset, name_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (buffer) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) buffer[name_size] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) buffer += name_size + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) rest -= prefix_size + name_size + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) /* no handler or insuffficient privileges, so skip */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) err = squashfs_read_metadata(sb, NULL, &start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) &offset, name_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^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) /* skip remaining xattr entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) err = squashfs_read_metadata(sb, &val, &start, &offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) sizeof(val));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) err = squashfs_read_metadata(sb, NULL, &start, &offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) le32_to_cpu(val.vsize));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) err = buffer_size - rest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) static int squashfs_xattr_get(struct inode *inode, int name_index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) const char *name, void *buffer, size_t buffer_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) struct super_block *sb = inode->i_sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) struct squashfs_sb_info *msblk = sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) u64 start = SQUASHFS_XATTR_BLK(squashfs_i(inode)->xattr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) + msblk->xattr_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) int offset = SQUASHFS_XATTR_OFFSET(squashfs_i(inode)->xattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) int count = squashfs_i(inode)->xattr_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) int name_len = strlen(name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) int err, vsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) char *target = kmalloc(name_len, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (target == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) /* loop reading each xattr name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) for (; count; count--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) struct squashfs_xattr_entry entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) struct squashfs_xattr_val val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) int type, prefix, name_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) err = squashfs_read_metadata(sb, &entry, &start, &offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) sizeof(entry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) name_size = le16_to_cpu(entry.size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) type = le16_to_cpu(entry.type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) prefix = type & SQUASHFS_XATTR_PREFIX_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (prefix == name_index && name_size == name_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) err = squashfs_read_metadata(sb, target, &start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) &offset, name_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) err = squashfs_read_metadata(sb, NULL, &start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) &offset, name_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (prefix == name_index && name_size == name_len &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) strncmp(target, name, name_size) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) /* found xattr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) if (type & SQUASHFS_XATTR_VALUE_OOL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) __le64 xattr_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) u64 xattr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) /* val is a reference to the real location */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) err = squashfs_read_metadata(sb, &val, &start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) &offset, sizeof(val));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) err = squashfs_read_metadata(sb, &xattr_val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) &start, &offset, sizeof(xattr_val));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) xattr = le64_to_cpu(xattr_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) start = SQUASHFS_XATTR_BLK(xattr) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) msblk->xattr_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) offset = SQUASHFS_XATTR_OFFSET(xattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) /* read xattr value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) err = squashfs_read_metadata(sb, &val, &start, &offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) sizeof(val));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) vsize = le32_to_cpu(val.vsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) if (buffer) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) if (vsize > buffer_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) err = -ERANGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) err = squashfs_read_metadata(sb, buffer, &start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) &offset, vsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) break;
^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) /* no match, skip remaining xattr entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) err = squashfs_read_metadata(sb, &val, &start, &offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) sizeof(val));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) err = squashfs_read_metadata(sb, NULL, &start, &offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) le32_to_cpu(val.vsize));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) goto failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) err = count ? vsize : -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) kfree(target);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) static int squashfs_xattr_handler_get(const struct xattr_handler *handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) struct dentry *unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) struct inode *inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) void *buffer, size_t size, int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) return squashfs_xattr_get(inode, handler->flags, name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) buffer, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^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) * User namespace support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static const struct xattr_handler squashfs_xattr_user_handler = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) .prefix = XATTR_USER_PREFIX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) .flags = SQUASHFS_XATTR_USER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) .get = squashfs_xattr_handler_get
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) * Trusted namespace support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) static bool squashfs_trusted_xattr_handler_list(struct dentry *d)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) return capable(CAP_SYS_ADMIN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) static const struct xattr_handler squashfs_xattr_trusted_handler = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) .prefix = XATTR_TRUSTED_PREFIX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) .flags = SQUASHFS_XATTR_TRUSTED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) .list = squashfs_trusted_xattr_handler_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) .get = squashfs_xattr_handler_get
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) * Security namespace support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) static const struct xattr_handler squashfs_xattr_security_handler = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) .prefix = XATTR_SECURITY_PREFIX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) .flags = SQUASHFS_XATTR_SECURITY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) .get = squashfs_xattr_handler_get
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) static const struct xattr_handler *squashfs_xattr_handler(int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) if (type & ~(SQUASHFS_XATTR_PREFIX_MASK | SQUASHFS_XATTR_VALUE_OOL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) /* ignore unrecognised type */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) switch (type & SQUASHFS_XATTR_PREFIX_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) case SQUASHFS_XATTR_USER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) return &squashfs_xattr_user_handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) case SQUASHFS_XATTR_TRUSTED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) return &squashfs_xattr_trusted_handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) case SQUASHFS_XATTR_SECURITY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) return &squashfs_xattr_security_handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) /* ignore unrecognised type */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) const struct xattr_handler *squashfs_xattr_handlers[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) &squashfs_xattr_user_handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) &squashfs_xattr_trusted_handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) &squashfs_xattr_security_handler,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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