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79 lines
2.0 KiB
79 lines
2.0 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* linux/fs/hfsplus/xattr_trusted.c |
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* |
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* Vyacheslav Dubeyko <[email protected]> |
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* |
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* Handler for storing security labels as extended attributes. |
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*/ |
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#include <linux/security.h> |
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#include <linux/nls.h> |
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#include "hfsplus_fs.h" |
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#include "xattr.h" |
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static int hfsplus_security_getxattr(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 hfsplus_getxattr(inode, name, buffer, size, |
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XATTR_SECURITY_PREFIX, |
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XATTR_SECURITY_PREFIX_LEN); |
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} |
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static int hfsplus_security_setxattr(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 *buffer, |
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size_t size, int flags) |
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{ |
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return hfsplus_setxattr(inode, name, buffer, size, flags, |
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XATTR_SECURITY_PREFIX, |
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XATTR_SECURITY_PREFIX_LEN); |
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} |
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static int hfsplus_initxattrs(struct inode *inode, |
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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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char *xattr_name; |
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int err = 0; |
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xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1, |
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GFP_KERNEL); |
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if (!xattr_name) |
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return -ENOMEM; |
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for (xattr = xattr_array; xattr->name != NULL; xattr++) { |
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if (!strcmp(xattr->name, "")) |
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continue; |
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strcpy(xattr_name, XATTR_SECURITY_PREFIX); |
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strcpy(xattr_name + |
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XATTR_SECURITY_PREFIX_LEN, xattr->name); |
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memset(xattr_name + |
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XATTR_SECURITY_PREFIX_LEN + strlen(xattr->name), 0, 1); |
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err = __hfsplus_setxattr(inode, xattr_name, |
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xattr->value, xattr->value_len, 0); |
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if (err) |
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break; |
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} |
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kfree(xattr_name); |
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return err; |
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} |
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int hfsplus_init_security(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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&hfsplus_initxattrs, NULL); |
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} |
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const struct xattr_handler hfsplus_xattr_security_handler = { |
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.prefix = XATTR_SECURITY_PREFIX, |
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.get = hfsplus_security_getxattr, |
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.set = hfsplus_security_setxattr, |
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};
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