cf546ab6b1
When we get an error return code from userspace (the client-core) we check to make sure it is a valid code. This patch maps the whacky return code to -EINVAL instead of propagating garbage back up the call chain potentially resulting in a hard-to-find train-wreck. The client-core doesn't have any business returning whacky return codes, but if it does, we don't want the kernel to crash as a result. Signed-off-by: Mike Marshall <hubcap@omnibond.com>
570 lines
16 KiB
C
570 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* (C) 2001 Clemson University and The University of Chicago
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*
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* See COPYING in top-level directory.
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*/
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#include <linux/kernel.h>
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#include "protocol.h"
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#include "orangefs-kernel.h"
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#include "orangefs-dev-proto.h"
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#include "orangefs-bufmap.h"
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__s32 fsid_of_op(struct orangefs_kernel_op_s *op)
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{
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__s32 fsid = ORANGEFS_FS_ID_NULL;
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if (op) {
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switch (op->upcall.type) {
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case ORANGEFS_VFS_OP_FILE_IO:
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fsid = op->upcall.req.io.refn.fs_id;
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break;
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case ORANGEFS_VFS_OP_LOOKUP:
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fsid = op->upcall.req.lookup.parent_refn.fs_id;
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break;
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case ORANGEFS_VFS_OP_CREATE:
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fsid = op->upcall.req.create.parent_refn.fs_id;
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break;
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case ORANGEFS_VFS_OP_GETATTR:
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fsid = op->upcall.req.getattr.refn.fs_id;
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break;
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case ORANGEFS_VFS_OP_REMOVE:
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fsid = op->upcall.req.remove.parent_refn.fs_id;
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break;
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case ORANGEFS_VFS_OP_MKDIR:
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fsid = op->upcall.req.mkdir.parent_refn.fs_id;
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break;
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case ORANGEFS_VFS_OP_READDIR:
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fsid = op->upcall.req.readdir.refn.fs_id;
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break;
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case ORANGEFS_VFS_OP_SETATTR:
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fsid = op->upcall.req.setattr.refn.fs_id;
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break;
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case ORANGEFS_VFS_OP_SYMLINK:
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fsid = op->upcall.req.sym.parent_refn.fs_id;
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break;
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case ORANGEFS_VFS_OP_RENAME:
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fsid = op->upcall.req.rename.old_parent_refn.fs_id;
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break;
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case ORANGEFS_VFS_OP_STATFS:
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fsid = op->upcall.req.statfs.fs_id;
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break;
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case ORANGEFS_VFS_OP_TRUNCATE:
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fsid = op->upcall.req.truncate.refn.fs_id;
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break;
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case ORANGEFS_VFS_OP_RA_FLUSH:
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fsid = op->upcall.req.ra_cache_flush.refn.fs_id;
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break;
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case ORANGEFS_VFS_OP_FS_UMOUNT:
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fsid = op->upcall.req.fs_umount.fs_id;
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break;
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case ORANGEFS_VFS_OP_GETXATTR:
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fsid = op->upcall.req.getxattr.refn.fs_id;
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break;
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case ORANGEFS_VFS_OP_SETXATTR:
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fsid = op->upcall.req.setxattr.refn.fs_id;
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break;
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case ORANGEFS_VFS_OP_LISTXATTR:
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fsid = op->upcall.req.listxattr.refn.fs_id;
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break;
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case ORANGEFS_VFS_OP_REMOVEXATTR:
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fsid = op->upcall.req.removexattr.refn.fs_id;
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break;
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case ORANGEFS_VFS_OP_FSYNC:
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fsid = op->upcall.req.fsync.refn.fs_id;
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break;
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default:
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break;
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}
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}
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return fsid;
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}
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static int orangefs_inode_flags(struct ORANGEFS_sys_attr_s *attrs)
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{
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int flags = 0;
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if (attrs->flags & ORANGEFS_IMMUTABLE_FL)
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flags |= S_IMMUTABLE;
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else
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flags &= ~S_IMMUTABLE;
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if (attrs->flags & ORANGEFS_APPEND_FL)
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flags |= S_APPEND;
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else
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flags &= ~S_APPEND;
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if (attrs->flags & ORANGEFS_NOATIME_FL)
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flags |= S_NOATIME;
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else
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flags &= ~S_NOATIME;
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return flags;
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}
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static int orangefs_inode_perms(struct ORANGEFS_sys_attr_s *attrs)
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{
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int perm_mode = 0;
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if (attrs->perms & ORANGEFS_O_EXECUTE)
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perm_mode |= S_IXOTH;
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if (attrs->perms & ORANGEFS_O_WRITE)
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perm_mode |= S_IWOTH;
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if (attrs->perms & ORANGEFS_O_READ)
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perm_mode |= S_IROTH;
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if (attrs->perms & ORANGEFS_G_EXECUTE)
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perm_mode |= S_IXGRP;
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if (attrs->perms & ORANGEFS_G_WRITE)
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perm_mode |= S_IWGRP;
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if (attrs->perms & ORANGEFS_G_READ)
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perm_mode |= S_IRGRP;
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if (attrs->perms & ORANGEFS_U_EXECUTE)
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perm_mode |= S_IXUSR;
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if (attrs->perms & ORANGEFS_U_WRITE)
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perm_mode |= S_IWUSR;
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if (attrs->perms & ORANGEFS_U_READ)
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perm_mode |= S_IRUSR;
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if (attrs->perms & ORANGEFS_G_SGID)
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perm_mode |= S_ISGID;
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if (attrs->perms & ORANGEFS_U_SUID)
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perm_mode |= S_ISUID;
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return perm_mode;
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}
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/*
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* NOTE: in kernel land, we never use the sys_attr->link_target for
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* anything, so don't bother copying it into the sys_attr object here.
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*/
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static inline int copy_attributes_from_inode(struct inode *inode,
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struct ORANGEFS_sys_attr_s *attrs,
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struct iattr *iattr)
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{
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umode_t tmp_mode;
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if (!iattr || !inode || !attrs) {
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gossip_err("NULL iattr (%p), inode (%p), attrs (%p) "
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"in copy_attributes_from_inode!\n",
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iattr,
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inode,
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attrs);
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return -EINVAL;
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}
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/*
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* We need to be careful to only copy the attributes out of the
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* iattr object that we know are valid.
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*/
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attrs->mask = 0;
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if (iattr->ia_valid & ATTR_UID) {
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attrs->owner = from_kuid(&init_user_ns, iattr->ia_uid);
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attrs->mask |= ORANGEFS_ATTR_SYS_UID;
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gossip_debug(GOSSIP_UTILS_DEBUG, "(UID) %d\n", attrs->owner);
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}
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if (iattr->ia_valid & ATTR_GID) {
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attrs->group = from_kgid(&init_user_ns, iattr->ia_gid);
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attrs->mask |= ORANGEFS_ATTR_SYS_GID;
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gossip_debug(GOSSIP_UTILS_DEBUG, "(GID) %d\n", attrs->group);
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}
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if (iattr->ia_valid & ATTR_ATIME) {
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attrs->mask |= ORANGEFS_ATTR_SYS_ATIME;
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if (iattr->ia_valid & ATTR_ATIME_SET) {
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attrs->atime = (time64_t)iattr->ia_atime.tv_sec;
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attrs->mask |= ORANGEFS_ATTR_SYS_ATIME_SET;
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}
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}
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if (iattr->ia_valid & ATTR_MTIME) {
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attrs->mask |= ORANGEFS_ATTR_SYS_MTIME;
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if (iattr->ia_valid & ATTR_MTIME_SET) {
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attrs->mtime = (time64_t)iattr->ia_mtime.tv_sec;
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attrs->mask |= ORANGEFS_ATTR_SYS_MTIME_SET;
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}
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}
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if (iattr->ia_valid & ATTR_CTIME)
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attrs->mask |= ORANGEFS_ATTR_SYS_CTIME;
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/*
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* ORANGEFS cannot set size with a setattr operation. Probably not likely
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* to be requested through the VFS, but just in case, don't worry about
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* ATTR_SIZE
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*/
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if (iattr->ia_valid & ATTR_MODE) {
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tmp_mode = iattr->ia_mode;
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if (tmp_mode & (S_ISVTX)) {
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if (is_root_handle(inode)) {
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/*
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* allow sticky bit to be set on root (since
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* it shows up that way by default anyhow),
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* but don't show it to the server
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*/
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tmp_mode -= S_ISVTX;
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} else {
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gossip_debug(GOSSIP_UTILS_DEBUG,
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"User attempted to set sticky bit on non-root directory; returning EINVAL.\n");
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return -EINVAL;
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}
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}
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if (tmp_mode & (S_ISUID)) {
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gossip_debug(GOSSIP_UTILS_DEBUG,
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"Attempting to set setuid bit (not supported); returning EINVAL.\n");
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return -EINVAL;
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}
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attrs->perms = ORANGEFS_util_translate_mode(tmp_mode);
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attrs->mask |= ORANGEFS_ATTR_SYS_PERM;
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}
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return 0;
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}
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static int orangefs_inode_type(enum orangefs_ds_type objtype)
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{
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if (objtype == ORANGEFS_TYPE_METAFILE)
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return S_IFREG;
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else if (objtype == ORANGEFS_TYPE_DIRECTORY)
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return S_IFDIR;
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else if (objtype == ORANGEFS_TYPE_SYMLINK)
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return S_IFLNK;
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else
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return -1;
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}
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static void orangefs_make_bad_inode(struct inode *inode)
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{
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if (is_root_handle(inode)) {
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/*
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* if this occurs, the pvfs2-client-core was killed but we
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* can't afford to lose the inode operations and such
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* associated with the root handle in any case.
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*/
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gossip_debug(GOSSIP_UTILS_DEBUG,
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"*** NOT making bad root inode %pU\n",
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get_khandle_from_ino(inode));
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} else {
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gossip_debug(GOSSIP_UTILS_DEBUG,
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"*** making bad inode %pU\n",
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get_khandle_from_ino(inode));
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make_bad_inode(inode);
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}
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}
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static int orangefs_inode_is_stale(struct inode *inode, int new,
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struct ORANGEFS_sys_attr_s *attrs, char *link_target)
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{
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struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
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int type = orangefs_inode_type(attrs->objtype);
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if (!new) {
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/*
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* If the inode type or symlink target have changed then this
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* inode is stale.
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*/
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if (type == -1 || !(inode->i_mode & type)) {
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orangefs_make_bad_inode(inode);
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return 1;
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}
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if (type == S_IFLNK && strncmp(orangefs_inode->link_target,
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link_target, ORANGEFS_NAME_MAX)) {
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orangefs_make_bad_inode(inode);
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return 1;
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}
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}
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return 0;
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}
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int orangefs_inode_getattr(struct inode *inode, int new, int bypass,
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u32 request_mask)
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{
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struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
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struct orangefs_kernel_op_s *new_op;
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loff_t inode_size, rounded_up_size;
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int ret, type;
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gossip_debug(GOSSIP_UTILS_DEBUG, "%s: called on inode %pU\n", __func__,
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get_khandle_from_ino(inode));
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if (!new && !bypass) {
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/*
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* Must have all the attributes in the mask and be within cache
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* time.
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*/
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if ((request_mask & orangefs_inode->getattr_mask) ==
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request_mask &&
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time_before(jiffies, orangefs_inode->getattr_time))
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return 0;
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}
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new_op = op_alloc(ORANGEFS_VFS_OP_GETATTR);
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if (!new_op)
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return -ENOMEM;
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new_op->upcall.req.getattr.refn = orangefs_inode->refn;
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/*
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* Size is the hardest attribute to get. The incremental cost of any
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* other attribute is essentially zero.
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*/
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if (request_mask & STATX_SIZE || new)
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new_op->upcall.req.getattr.mask = ORANGEFS_ATTR_SYS_ALL_NOHINT;
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else
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new_op->upcall.req.getattr.mask =
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ORANGEFS_ATTR_SYS_ALL_NOHINT & ~ORANGEFS_ATTR_SYS_SIZE;
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ret = service_operation(new_op, __func__,
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get_interruptible_flag(inode));
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if (ret != 0)
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goto out;
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type = orangefs_inode_type(new_op->
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downcall.resp.getattr.attributes.objtype);
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ret = orangefs_inode_is_stale(inode, new,
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&new_op->downcall.resp.getattr.attributes,
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new_op->downcall.resp.getattr.link_target);
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if (ret) {
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ret = -ESTALE;
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goto out;
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}
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switch (type) {
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case S_IFREG:
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inode->i_flags = orangefs_inode_flags(&new_op->
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downcall.resp.getattr.attributes);
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if (request_mask & STATX_SIZE || new) {
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inode_size = (loff_t)new_op->
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downcall.resp.getattr.attributes.size;
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rounded_up_size =
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(inode_size + (4096 - (inode_size % 4096)));
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inode->i_size = inode_size;
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orangefs_inode->blksize =
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new_op->downcall.resp.getattr.attributes.blksize;
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spin_lock(&inode->i_lock);
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inode->i_bytes = inode_size;
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inode->i_blocks =
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(unsigned long)(rounded_up_size / 512);
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spin_unlock(&inode->i_lock);
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}
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break;
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case S_IFDIR:
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if (request_mask & STATX_SIZE || new) {
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inode->i_size = PAGE_SIZE;
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orangefs_inode->blksize = i_blocksize(inode);
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spin_lock(&inode->i_lock);
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inode_set_bytes(inode, inode->i_size);
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spin_unlock(&inode->i_lock);
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}
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set_nlink(inode, 1);
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break;
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case S_IFLNK:
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if (new) {
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inode->i_size = (loff_t)strlen(new_op->
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downcall.resp.getattr.link_target);
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orangefs_inode->blksize = i_blocksize(inode);
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ret = strscpy(orangefs_inode->link_target,
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new_op->downcall.resp.getattr.link_target,
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ORANGEFS_NAME_MAX);
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if (ret == -E2BIG) {
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ret = -EIO;
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goto out;
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}
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inode->i_link = orangefs_inode->link_target;
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}
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break;
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}
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inode->i_uid = make_kuid(&init_user_ns, new_op->
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downcall.resp.getattr.attributes.owner);
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inode->i_gid = make_kgid(&init_user_ns, new_op->
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downcall.resp.getattr.attributes.group);
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inode->i_atime.tv_sec = (time64_t)new_op->
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downcall.resp.getattr.attributes.atime;
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inode->i_mtime.tv_sec = (time64_t)new_op->
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downcall.resp.getattr.attributes.mtime;
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inode->i_ctime.tv_sec = (time64_t)new_op->
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downcall.resp.getattr.attributes.ctime;
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inode->i_atime.tv_nsec = 0;
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inode->i_mtime.tv_nsec = 0;
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inode->i_ctime.tv_nsec = 0;
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/* special case: mark the root inode as sticky */
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inode->i_mode = type | (is_root_handle(inode) ? S_ISVTX : 0) |
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orangefs_inode_perms(&new_op->downcall.resp.getattr.attributes);
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orangefs_inode->getattr_time = jiffies +
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orangefs_getattr_timeout_msecs*HZ/1000;
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if (request_mask & STATX_SIZE || new)
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orangefs_inode->getattr_mask = STATX_BASIC_STATS;
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else
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orangefs_inode->getattr_mask = STATX_BASIC_STATS & ~STATX_SIZE;
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ret = 0;
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out:
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op_release(new_op);
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return ret;
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}
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int orangefs_inode_check_changed(struct inode *inode)
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{
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struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
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struct orangefs_kernel_op_s *new_op;
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int ret;
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gossip_debug(GOSSIP_UTILS_DEBUG, "%s: called on inode %pU\n", __func__,
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get_khandle_from_ino(inode));
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new_op = op_alloc(ORANGEFS_VFS_OP_GETATTR);
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if (!new_op)
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return -ENOMEM;
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new_op->upcall.req.getattr.refn = orangefs_inode->refn;
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new_op->upcall.req.getattr.mask = ORANGEFS_ATTR_SYS_TYPE |
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ORANGEFS_ATTR_SYS_LNK_TARGET;
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ret = service_operation(new_op, __func__,
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get_interruptible_flag(inode));
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if (ret != 0)
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goto out;
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ret = orangefs_inode_is_stale(inode, 0,
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&new_op->downcall.resp.getattr.attributes,
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new_op->downcall.resp.getattr.link_target);
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out:
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op_release(new_op);
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return ret;
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}
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/*
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* issues a orangefs setattr request to make sure the new attribute values
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* take effect if successful. returns 0 on success; -errno otherwise
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*/
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int orangefs_inode_setattr(struct inode *inode, struct iattr *iattr)
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{
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struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
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struct orangefs_kernel_op_s *new_op;
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int ret;
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new_op = op_alloc(ORANGEFS_VFS_OP_SETATTR);
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if (!new_op)
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return -ENOMEM;
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new_op->upcall.req.setattr.refn = orangefs_inode->refn;
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ret = copy_attributes_from_inode(inode,
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&new_op->upcall.req.setattr.attributes,
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iattr);
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if (ret >= 0) {
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ret = service_operation(new_op, __func__,
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get_interruptible_flag(inode));
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gossip_debug(GOSSIP_UTILS_DEBUG,
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"orangefs_inode_setattr: returning %d\n",
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ret);
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}
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op_release(new_op);
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if (ret == 0)
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orangefs_inode->getattr_time = jiffies - 1;
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return ret;
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}
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/*
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* The following is a very dirty hack that is now a permanent part of the
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* ORANGEFS protocol. See protocol.h for more error definitions.
|
|
*/
|
|
|
|
/* The order matches include/orangefs-types.h in the OrangeFS source. */
|
|
static int PINT_errno_mapping[] = {
|
|
0, EPERM, ENOENT, EINTR, EIO, ENXIO, EBADF, EAGAIN, ENOMEM,
|
|
EFAULT, EBUSY, EEXIST, ENODEV, ENOTDIR, EISDIR, EINVAL, EMFILE,
|
|
EFBIG, ENOSPC, EROFS, EMLINK, EPIPE, EDEADLK, ENAMETOOLONG,
|
|
ENOLCK, ENOSYS, ENOTEMPTY, ELOOP, EWOULDBLOCK, ENOMSG, EUNATCH,
|
|
EBADR, EDEADLOCK, ENODATA, ETIME, ENONET, EREMOTE, ECOMM,
|
|
EPROTO, EBADMSG, EOVERFLOW, ERESTART, EMSGSIZE, EPROTOTYPE,
|
|
ENOPROTOOPT, EPROTONOSUPPORT, EOPNOTSUPP, EADDRINUSE,
|
|
EADDRNOTAVAIL, ENETDOWN, ENETUNREACH, ENETRESET, ENOBUFS,
|
|
ETIMEDOUT, ECONNREFUSED, EHOSTDOWN, EHOSTUNREACH, EALREADY,
|
|
EACCES, ECONNRESET, ERANGE
|
|
};
|
|
|
|
int orangefs_normalize_to_errno(__s32 error_code)
|
|
{
|
|
__u32 i;
|
|
|
|
/* Success */
|
|
if (error_code == 0) {
|
|
return 0;
|
|
/*
|
|
* This shouldn't ever happen. If it does it should be fixed on the
|
|
* server.
|
|
*/
|
|
} else if (error_code > 0) {
|
|
gossip_err("orangefs: error status receieved.\n");
|
|
gossip_err("orangefs: assuming error code is inverted.\n");
|
|
error_code = -error_code;
|
|
}
|
|
|
|
/*
|
|
* XXX: This is very bad since error codes from ORANGEFS may not be
|
|
* suitable for return into userspace.
|
|
*/
|
|
|
|
/*
|
|
* Convert ORANGEFS error values into errno values suitable for return
|
|
* from the kernel.
|
|
*/
|
|
if ((-error_code) & ORANGEFS_NON_ERRNO_ERROR_BIT) {
|
|
if (((-error_code) &
|
|
(ORANGEFS_ERROR_NUMBER_BITS|ORANGEFS_NON_ERRNO_ERROR_BIT|
|
|
ORANGEFS_ERROR_BIT)) == ORANGEFS_ECANCEL) {
|
|
/*
|
|
* cancellation error codes generally correspond to
|
|
* a timeout from the client's perspective
|
|
*/
|
|
error_code = -ETIMEDOUT;
|
|
} else {
|
|
/* assume a default error code */
|
|
gossip_err("orangefs: warning: got error code without errno equivalent: %d.\n", error_code);
|
|
error_code = -EINVAL;
|
|
}
|
|
|
|
/* Convert ORANGEFS encoded errno values into regular errno values. */
|
|
} else if ((-error_code) & ORANGEFS_ERROR_BIT) {
|
|
i = (-error_code) & ~(ORANGEFS_ERROR_BIT|ORANGEFS_ERROR_CLASS_BITS);
|
|
if (i < ARRAY_SIZE(PINT_errno_mapping))
|
|
error_code = -PINT_errno_mapping[i];
|
|
else
|
|
error_code = -EINVAL;
|
|
|
|
/*
|
|
* Only ORANGEFS protocol error codes should ever come here. Otherwise
|
|
* there is a bug somewhere.
|
|
*/
|
|
} else {
|
|
gossip_err("orangefs: orangefs_normalize_to_errno: got error code which is not from ORANGEFS.\n");
|
|
error_code = -EINVAL;
|
|
}
|
|
return error_code;
|
|
}
|
|
|
|
#define NUM_MODES 11
|
|
__s32 ORANGEFS_util_translate_mode(int mode)
|
|
{
|
|
int ret = 0;
|
|
int i = 0;
|
|
static int modes[NUM_MODES] = {
|
|
S_IXOTH, S_IWOTH, S_IROTH,
|
|
S_IXGRP, S_IWGRP, S_IRGRP,
|
|
S_IXUSR, S_IWUSR, S_IRUSR,
|
|
S_ISGID, S_ISUID
|
|
};
|
|
static int orangefs_modes[NUM_MODES] = {
|
|
ORANGEFS_O_EXECUTE, ORANGEFS_O_WRITE, ORANGEFS_O_READ,
|
|
ORANGEFS_G_EXECUTE, ORANGEFS_G_WRITE, ORANGEFS_G_READ,
|
|
ORANGEFS_U_EXECUTE, ORANGEFS_U_WRITE, ORANGEFS_U_READ,
|
|
ORANGEFS_G_SGID, ORANGEFS_U_SUID
|
|
};
|
|
|
|
for (i = 0; i < NUM_MODES; i++)
|
|
if (mode & modes[i])
|
|
ret |= orangefs_modes[i];
|
|
|
|
return ret;
|
|
}
|
|
#undef NUM_MODES
|