ssize_t xfs_vn_listxattr( struct dentry *dentry, char *data, size_t size) { struct xfs_attr_list_context context; struct attrlist_cursor_kern cursor = { 0 }; struct inode *inode = d_inode(dentry); int error; /* * First read the regular on-disk attributes. */ memset(&context, 0, sizeof(context)); context.dp = XFS_I(inode); context.cursor = &cursor; context.resynch = 1; context.alist = size ? data : NULL; context.bufsize = size; context.firstu = context.bufsize; context.put_listent = xfs_xattr_put_listent; error = xfs_attr_list_int(&context); if (error) return error; if (context.count < 0) return -ERANGE; return context.count; }
/* * Generate a list of extended attribute names and optionally * also value lengths. Positive return value follows the XFS * convention of being an error, zero or negative return code * is the length of the buffer returned (negated), indicating * success. */ int xfs_attr_list( xfs_inode_t *dp, char *buffer, int bufsize, int flags, attrlist_cursor_kern_t *cursor) { xfs_attr_list_context_t context; struct attrlist *alist; int error; /* * Validate the cursor. */ if (cursor->pad1 || cursor->pad2) return -EINVAL; if ((cursor->initted == 0) && (cursor->hashval || cursor->blkno || cursor->offset)) return -EINVAL; /* * Check for a properly aligned buffer. */ if (((long)buffer) & (sizeof(int)-1)) return -EFAULT; if (flags & ATTR_KERNOVAL) bufsize = 0; /* * Initialize the output buffer. */ memset(&context, 0, sizeof(context)); context.dp = dp; context.cursor = cursor; context.resynch = 1; context.flags = flags; context.alist = buffer; context.bufsize = (bufsize & ~(sizeof(int)-1)); /* align */ context.firstu = context.bufsize; context.put_listent = xfs_attr_put_listent; alist = (struct attrlist *)context.alist; alist->al_count = 0; alist->al_more = 0; alist->al_offset[0] = context.bufsize; error = xfs_attr_list_int(&context); ASSERT(error <= 0); return error; }
ssize_t xfs_vn_listxattr(struct dentry *dentry, char *data, size_t size) { struct xfs_attr_list_context context; struct attrlist_cursor_kern cursor = { 0 }; struct inode *inode = dentry->d_inode; int error; /* * First read the regular on-disk attributes. */ memset(&context, 0, sizeof(context)); context.dp = XFS_I(inode); context.cursor = &cursor; context.resynch = 1; context.alist = data; context.bufsize = size; context.firstu = context.bufsize; if (size) context.put_listent = xfs_xattr_put_listent; else context.put_listent = xfs_xattr_put_listent_sizes; xfs_attr_list_int(&context); if (context.count < 0) return -ERANGE; /* * Then add the two synthetic ACL attributes. */ if (posix_acl_access_exists(inode)) { error = list_one_attr(POSIX_ACL_XATTR_ACCESS, strlen(POSIX_ACL_XATTR_ACCESS) + 1, data, size, &context.count); if (error) return error; } if (posix_acl_default_exists(inode)) { error = list_one_attr(POSIX_ACL_XATTR_DEFAULT, strlen(POSIX_ACL_XATTR_DEFAULT) + 1, data, size, &context.count); if (error) return error; } return context.count; }