57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
#include <linux/reiserfs_fs.h>
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#include <linux/capability.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/pagemap.h>
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#include <linux/xattr.h>
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#include <linux/reiserfs_xattr.h>
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#include <asm/uaccess.h>
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static int
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trusted_get(struct dentry *dentry, const char *name, void *buffer, size_t size,
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int handler_flags)
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{
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if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
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return -EINVAL;
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if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(dentry->d_inode))
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return -EPERM;
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return reiserfs_xattr_get(dentry->d_inode, name, buffer, size);
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}
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static int
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trusted_set(struct dentry *dentry, const char *name, const void *buffer,
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size_t size, int flags, int handler_flags)
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{
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if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
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return -EINVAL;
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if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(dentry->d_inode))
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return -EPERM;
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return reiserfs_xattr_set(dentry->d_inode, name, buffer, size, flags);
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}
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static size_t trusted_list(struct dentry *dentry, char *list, size_t list_size,
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const char *name, size_t name_len, int handler_flags)
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{
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const size_t len = name_len + 1;
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if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(dentry->d_inode))
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return 0;
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if (list && len <= list_size) {
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memcpy(list, name, name_len);
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list[name_len] = '\0';
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}
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return len;
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}
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struct xattr_handler reiserfs_xattr_trusted_handler = {
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.prefix = XATTR_TRUSTED_PREFIX,
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.get = trusted_get,
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.set = trusted_set,
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.list = trusted_list,
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};
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