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Diffstat (limited to 'ANDROID_3.4.5/fs/squashfs/xattr.c')
-rw-r--r--ANDROID_3.4.5/fs/squashfs/xattr.c324
1 files changed, 0 insertions, 324 deletions
diff --git a/ANDROID_3.4.5/fs/squashfs/xattr.c b/ANDROID_3.4.5/fs/squashfs/xattr.c
deleted file mode 100644
index 92fcde7b..00000000
--- a/ANDROID_3.4.5/fs/squashfs/xattr.c
+++ /dev/null
@@ -1,324 +0,0 @@
-/*
- * Squashfs - a compressed read only filesystem for Linux
- *
- * Copyright (c) 2010
- * Phillip Lougher <phillip@squashfs.org.uk>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- * xattr.c
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/string.h>
-#include <linux/fs.h>
-#include <linux/vfs.h>
-#include <linux/xattr.h>
-#include <linux/slab.h>
-
-#include "squashfs_fs.h"
-#include "squashfs_fs_sb.h"
-#include "squashfs_fs_i.h"
-#include "squashfs.h"
-
-static const struct xattr_handler *squashfs_xattr_handler(int);
-
-ssize_t squashfs_listxattr(struct dentry *d, char *buffer,
- size_t buffer_size)
-{
- struct inode *inode = d->d_inode;
- struct super_block *sb = inode->i_sb;
- struct squashfs_sb_info *msblk = sb->s_fs_info;
- u64 start = SQUASHFS_XATTR_BLK(squashfs_i(inode)->xattr)
- + msblk->xattr_table;
- int offset = SQUASHFS_XATTR_OFFSET(squashfs_i(inode)->xattr);
- int count = squashfs_i(inode)->xattr_count;
- size_t rest = buffer_size;
- int err;
-
- /* check that the file system has xattrs */
- if (msblk->xattr_id_table == NULL)
- return -EOPNOTSUPP;
-
- /* loop reading each xattr name */
- while (count--) {
- struct squashfs_xattr_entry entry;
- struct squashfs_xattr_val val;
- const struct xattr_handler *handler;
- int name_size, prefix_size = 0;
-
- err = squashfs_read_metadata(sb, &entry, &start, &offset,
- sizeof(entry));
- if (err < 0)
- goto failed;
-
- name_size = le16_to_cpu(entry.size);
- handler = squashfs_xattr_handler(le16_to_cpu(entry.type));
- if (handler)
- prefix_size = handler->list(d, buffer, rest, NULL,
- name_size, handler->flags);
- if (prefix_size) {
- if (buffer) {
- if (prefix_size + name_size + 1 > rest) {
- err = -ERANGE;
- goto failed;
- }
- buffer += prefix_size;
- }
- err = squashfs_read_metadata(sb, buffer, &start,
- &offset, name_size);
- if (err < 0)
- goto failed;
- if (buffer) {
- buffer[name_size] = '\0';
- buffer += name_size + 1;
- }
- rest -= prefix_size + name_size + 1;
- } else {
- /* no handler or insuffficient privileges, so skip */
- err = squashfs_read_metadata(sb, NULL, &start,
- &offset, name_size);
- if (err < 0)
- goto failed;
- }
-
-
- /* skip remaining xattr entry */
- err = squashfs_read_metadata(sb, &val, &start, &offset,
- sizeof(val));
- if (err < 0)
- goto failed;
-
- err = squashfs_read_metadata(sb, NULL, &start, &offset,
- le32_to_cpu(val.vsize));
- if (err < 0)
- goto failed;
- }
- err = buffer_size - rest;
-
-failed:
- return err;
-}
-
-
-static int squashfs_xattr_get(struct inode *inode, int name_index,
- const char *name, void *buffer, size_t buffer_size)
-{
- struct super_block *sb = inode->i_sb;
- struct squashfs_sb_info *msblk = sb->s_fs_info;
- u64 start = SQUASHFS_XATTR_BLK(squashfs_i(inode)->xattr)
- + msblk->xattr_table;
- int offset = SQUASHFS_XATTR_OFFSET(squashfs_i(inode)->xattr);
- int count = squashfs_i(inode)->xattr_count;
- int name_len = strlen(name);
- int err, vsize;
- char *target = kmalloc(name_len, GFP_KERNEL);
-
- if (target == NULL)
- return -ENOMEM;
-
- /* loop reading each xattr name */
- for (; count; count--) {
- struct squashfs_xattr_entry entry;
- struct squashfs_xattr_val val;
- int type, prefix, name_size;
-
- err = squashfs_read_metadata(sb, &entry, &start, &offset,
- sizeof(entry));
- if (err < 0)
- goto failed;
-
- name_size = le16_to_cpu(entry.size);
- type = le16_to_cpu(entry.type);
- prefix = type & SQUASHFS_XATTR_PREFIX_MASK;
-
- if (prefix == name_index && name_size == name_len)
- err = squashfs_read_metadata(sb, target, &start,
- &offset, name_size);
- else
- err = squashfs_read_metadata(sb, NULL, &start,
- &offset, name_size);
- if (err < 0)
- goto failed;
-
- if (prefix == name_index && name_size == name_len &&
- strncmp(target, name, name_size) == 0) {
- /* found xattr */
- if (type & SQUASHFS_XATTR_VALUE_OOL) {
- __le64 xattr_val;
- u64 xattr;
- /* val is a reference to the real location */
- err = squashfs_read_metadata(sb, &val, &start,
- &offset, sizeof(val));
- if (err < 0)
- goto failed;
- err = squashfs_read_metadata(sb, &xattr_val,
- &start, &offset, sizeof(xattr_val));
- if (err < 0)
- goto failed;
- xattr = le64_to_cpu(xattr_val);
- start = SQUASHFS_XATTR_BLK(xattr) +
- msblk->xattr_table;
- offset = SQUASHFS_XATTR_OFFSET(xattr);
- }
- /* read xattr value */
- err = squashfs_read_metadata(sb, &val, &start, &offset,
- sizeof(val));
- if (err < 0)
- goto failed;
-
- vsize = le32_to_cpu(val.vsize);
- if (buffer) {
- if (vsize > buffer_size) {
- err = -ERANGE;
- goto failed;
- }
- err = squashfs_read_metadata(sb, buffer, &start,
- &offset, vsize);
- if (err < 0)
- goto failed;
- }
- break;
- }
-
- /* no match, skip remaining xattr entry */
- err = squashfs_read_metadata(sb, &val, &start, &offset,
- sizeof(val));
- if (err < 0)
- goto failed;
- err = squashfs_read_metadata(sb, NULL, &start, &offset,
- le32_to_cpu(val.vsize));
- if (err < 0)
- goto failed;
- }
- err = count ? vsize : -ENODATA;
-
-failed:
- kfree(target);
- return err;
-}
-
-
-/*
- * User namespace support
- */
-static size_t squashfs_user_list(struct dentry *d, char *list, size_t list_size,
- const char *name, size_t name_len, int type)
-{
- if (list && XATTR_USER_PREFIX_LEN <= list_size)
- memcpy(list, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
- return XATTR_USER_PREFIX_LEN;
-}
-
-static int squashfs_user_get(struct dentry *d, const char *name, void *buffer,
- size_t size, int type)
-{
- if (name[0] == '\0')
- return -EINVAL;
-
- return squashfs_xattr_get(d->d_inode, SQUASHFS_XATTR_USER, name,
- buffer, size);
-}
-
-static const struct xattr_handler squashfs_xattr_user_handler = {
- .prefix = XATTR_USER_PREFIX,
- .list = squashfs_user_list,
- .get = squashfs_user_get
-};
-
-/*
- * Trusted namespace support
- */
-static size_t squashfs_trusted_list(struct dentry *d, char *list,
- size_t list_size, const char *name, size_t name_len, int type)
-{
- if (!capable(CAP_SYS_ADMIN))
- return 0;
-
- if (list && XATTR_TRUSTED_PREFIX_LEN <= list_size)
- memcpy(list, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN);
- return XATTR_TRUSTED_PREFIX_LEN;
-}
-
-static int squashfs_trusted_get(struct dentry *d, const char *name,
- void *buffer, size_t size, int type)
-{
- if (name[0] == '\0')
- return -EINVAL;
-
- return squashfs_xattr_get(d->d_inode, SQUASHFS_XATTR_TRUSTED, name,
- buffer, size);
-}
-
-static const struct xattr_handler squashfs_xattr_trusted_handler = {
- .prefix = XATTR_TRUSTED_PREFIX,
- .list = squashfs_trusted_list,
- .get = squashfs_trusted_get
-};
-
-/*
- * Security namespace support
- */
-static size_t squashfs_security_list(struct dentry *d, char *list,
- size_t list_size, const char *name, size_t name_len, int type)
-{
- if (list && XATTR_SECURITY_PREFIX_LEN <= list_size)
- memcpy(list, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN);
- return XATTR_SECURITY_PREFIX_LEN;
-}
-
-static int squashfs_security_get(struct dentry *d, const char *name,
- void *buffer, size_t size, int type)
-{
- if (name[0] == '\0')
- return -EINVAL;
-
- return squashfs_xattr_get(d->d_inode, SQUASHFS_XATTR_SECURITY, name,
- buffer, size);
-}
-
-static const struct xattr_handler squashfs_xattr_security_handler = {
- .prefix = XATTR_SECURITY_PREFIX,
- .list = squashfs_security_list,
- .get = squashfs_security_get
-};
-
-static const struct xattr_handler *squashfs_xattr_handler(int type)
-{
- if (type & ~(SQUASHFS_XATTR_PREFIX_MASK | SQUASHFS_XATTR_VALUE_OOL))
- /* ignore unrecognised type */
- return NULL;
-
- switch (type & SQUASHFS_XATTR_PREFIX_MASK) {
- case SQUASHFS_XATTR_USER:
- return &squashfs_xattr_user_handler;
- case SQUASHFS_XATTR_TRUSTED:
- return &squashfs_xattr_trusted_handler;
- case SQUASHFS_XATTR_SECURITY:
- return &squashfs_xattr_security_handler;
- default:
- /* ignore unrecognised type */
- return NULL;
- }
-}
-
-const struct xattr_handler *squashfs_xattr_handlers[] = {
- &squashfs_xattr_user_handler,
- &squashfs_xattr_trusted_handler,
- &squashfs_xattr_security_handler,
- NULL
-};
-
generated by cgit (git 2.34.1) at 2025-01-10 14:24:06 +0000