| 1 | |
| 2 | |
| 3 | * linux/fs/hfsplus/xattr_trusted.c
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| 4 | *
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| 5 | * Vyacheslav Dubeyko <[email protected]>
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| 6 | *
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| 7 | * Handler for storing security labels as extended attributes.
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| 8 |
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| 9 |
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| 10 | #include <linux/security.h>
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| 11 | #include <linux/nls.h>
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| 12 |
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| 13 | #include "hfsplus_fs.h"
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| 14 | #include "xattr.h"
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| 15 |
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| 16 | static int hfsplus_security_getxattr(const struct xattr_handler *handler,
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| 17 | struct dentry *unused, struct inode *inode,
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| 18 | const char *name, void *buffer, size_t size)
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| 19 | {
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| 20 | return hfsplus_getxattr(inode, name, buffer, size,
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| 21 | XATTR_SECURITY_PREFIX,
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| 22 | XATTR_SECURITY_PREFIX_LEN);
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| 23 | }
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| 24 |
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| 25 | static int hfsplus_security_setxattr(const struct xattr_handler *handler,
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| 26 | const struct mnt_idmap *idmap,
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| 27 | struct dentry *unused, struct inode *inode,
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| 28 | const char *name, const void *buffer,
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| 29 | size_t size, int flags)
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| 30 | {
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| 31 | return hfsplus_setxattr(inode, name, buffer, size, flags,
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| 32 | XATTR_SECURITY_PREFIX,
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| 33 | XATTR_SECURITY_PREFIX_LEN);
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| 34 | }
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| 35 |
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| 36 | static int hfsplus_initxattrs(struct inode *inode,
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| 37 | const struct xattr *xattr_array,
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| 38 | void *fs_info)
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| 39 | {
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| 40 | const struct xattr *xattr;
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| 41 | char *xattr_name;
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| 42 | int err = 0;
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| 43 |
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| 44 | xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1,
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| 45 | GFP_KERNEL);
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| 46 | if (!xattr_name)
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| 47 | return -ENOMEM;
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| 48 | for (xattr = xattr_array; xattr->name != NULL; xattr++) {
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| 49 |
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| 50 | if (!strcmp(xattr->name, ""))
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| 51 | continue;
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| 52 |
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| 53 | strcpy(xattr_name, XATTR_SECURITY_PREFIX);
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| 54 | strcpy(xattr_name +
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| 55 | XATTR_SECURITY_PREFIX_LEN, xattr->name);
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| 56 | memset(xattr_name +
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| 57 | XATTR_SECURITY_PREFIX_LEN + strlen(xattr->name), 0, 1);
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| 58 |
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| 59 | err = __hfsplus_setxattr(inode, xattr_name,
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| 60 | xattr->value, xattr->value_len, 0);
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| 61 | if (err)
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| 62 | break;
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| 63 | }
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| 64 | kfree(xattr_name);
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| 65 | return err;
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| 66 | }
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| 67 |
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| 68 | int hfsplus_init_security(struct inode *inode, struct inode *dir,
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| 69 | const struct qstr *qstr)
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| 70 | {
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| 71 | return security_inode_init_security(inode, dir, qstr,
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| 72 | &hfsplus_initxattrs, NULL);
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| 73 | }
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| 74 |
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| 75 | const struct xattr_handler hfsplus_xattr_security_handler = {
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| 76 | .prefix = XATTR_SECURITY_PREFIX,
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| 77 | .get = hfsplus_security_getxattr,
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| 78 | .set = hfsplus_security_setxattr,
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| 79 | };
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