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73 lines
1.6 KiB
73 lines
1.6 KiB
#include <linux/file.h>
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#include <linux/fs.h>
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#include <linux/xattr.h>
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#include <linux/dcache.h>
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#include "fat.h"
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#ifndef CONFIG_FAT_VIRTUAL_XATTR_SELINUX_LABEL
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#define CONFIG_FAT_VIRTUAL_XATTR_SELINUX_LABEL ("undefined")
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#endif
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static const char default_xattr[] = CONFIG_FAT_VIRTUAL_XATTR_SELINUX_LABEL;
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static int can_support(const char *name)
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{
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if (!name || strcmp(name, "security.selinux"))
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return -1;
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return 0;
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}
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ssize_t fat_listxattr(struct dentry *dentry, char *list, size_t size)
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{
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return 0;
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}
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static int __fat_xattr_check_support(const char *name)
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{
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if (can_support(name))
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return -EOPNOTSUPP;
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return 0;
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}
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ssize_t __fat_getxattr(const char *name, void *value, size_t size)
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{
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if (can_support(name))
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return -EOPNOTSUPP;
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if ((size > strlen(default_xattr)+1) && value)
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strcpy(value, default_xattr);
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return strlen(default_xattr);
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}
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static int fat_xattr_get(const struct xattr_handler *handler,
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struct dentry *dentry, struct inode *inode,
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const char *name, void *buffer, size_t size)
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{
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return __fat_getxattr(name, buffer, size);
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}
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static int fat_xattr_set(const struct xattr_handler *handler,
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struct dentry *dentry, struct inode *inode,
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const char *name, const void *value, size_t size,
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int flags)
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{
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return __fat_xattr_check_support(name);
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}
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const struct xattr_handler fat_xattr_handler = {
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.prefix = "", /* match anything */
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.get = fat_xattr_get,
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.set = fat_xattr_set,
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};
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const struct xattr_handler *fat_xattr_handlers[] = {
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&fat_xattr_handler,
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NULL
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};
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void setup_fat_xattr_handler(struct super_block *sb)
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{
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sb->s_xattr = fat_xattr_handlers;
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}
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