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66 lines
1.6 KiB
66 lines
1.6 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* linux/fs/ext4/xattr_security.c |
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* Handler for storing security labels as extended attributes. |
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*/ |
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#include <linux/string.h> |
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#include <linux/fs.h> |
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#include <linux/security.h> |
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#include <linux/slab.h> |
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#include "ext4_jbd2.h" |
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#include "ext4.h" |
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#include "xattr.h" |
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static int |
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ext4_xattr_security_get(const struct xattr_handler *handler, |
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struct dentry *unused, struct inode *inode, |
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const char *name, void *buffer, size_t size) |
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{ |
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return ext4_xattr_get(inode, EXT4_XATTR_INDEX_SECURITY, |
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name, buffer, size); |
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} |
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static int |
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ext4_xattr_security_set(const struct xattr_handler *handler, |
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struct user_namespace *mnt_userns, |
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struct dentry *unused, struct inode *inode, |
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const char *name, const void *value, |
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size_t size, int flags) |
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{ |
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return ext4_xattr_set(inode, EXT4_XATTR_INDEX_SECURITY, |
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name, value, size, flags); |
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} |
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static int |
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ext4_initxattrs(struct inode *inode, const struct xattr *xattr_array, |
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void *fs_info) |
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{ |
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const struct xattr *xattr; |
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handle_t *handle = fs_info; |
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int err = 0; |
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for (xattr = xattr_array; xattr->name != NULL; xattr++) { |
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err = ext4_xattr_set_handle(handle, inode, |
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EXT4_XATTR_INDEX_SECURITY, |
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xattr->name, xattr->value, |
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xattr->value_len, XATTR_CREATE); |
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if (err < 0) |
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break; |
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} |
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return err; |
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} |
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int |
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ext4_init_security(handle_t *handle, struct inode *inode, struct inode *dir, |
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const struct qstr *qstr) |
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{ |
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return security_inode_init_security(inode, dir, qstr, |
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&ext4_initxattrs, handle); |
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} |
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const struct xattr_handler ext4_xattr_security_handler = { |
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.prefix = XATTR_SECURITY_PREFIX, |
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.get = ext4_xattr_security_get, |
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.set = ext4_xattr_security_set, |
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};
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