// SPDX-License-Identifier: GPL-2.0
/*
* (C) 2001 Clemson University and The University of Chicago
* Copyright 2018 Omnibond Systems, L.L.C.
*
* See COPYING in top-level directory.
*/
#include <linux/kernel.h>
#include "protocol.h"
#include "orangefs-kernel.h"
#include "orangefs-dev-proto.h"
#include "orangefs-bufmap.h"
__s32 fsid_of_op(struct orangefs_kernel_op_s *op)
{
__s32 fsid = ORANGEFS_FS_ID_NULL;
if (op) {
switch (op->upcall.type) {
case ORANGEFS_VFS_OP_FILE_IO:
fsid = op->upcall.req.io.refn.fs_id;
break;
case ORANGEFS_VFS_OP_LOOKUP:
fsid = op->upcall.req.lookup.parent_refn.fs_id;
break;
case ORANGEFS_VFS_OP_CREATE:
fsid = op->upcall.req.create.parent_refn.fs_id;
break;
case ORANGEFS_VFS_OP_GETATTR:
fsid = op->upcall.req.getattr.refn.fs_id;
break;
case ORANGEFS_VFS_OP_REMOVE:
fsid = op->upcall.req.remove.parent_refn.fs_id;
break;
case ORANGEFS_VFS_OP_MKDIR:
fsid = op->upcall.req.mkdir.parent_refn.fs_id;
break;
case ORANGEFS_VFS_OP_READDIR:
fsid = op->upcall.req.readdir.refn.fs_id;
break;
case ORANGEFS_VFS_OP_SETATTR:
fsid = op->upcall.req.setattr.refn.fs_id;
break;
case ORANGEFS_VFS_OP_SYMLINK:
fsid = op->upcall.req.sym.parent_refn.fs_id;
break;
case ORANGEFS_VFS_OP_RENAME:
fsid = op->upcall.req.rename.old_parent_refn.fs_id;
break;
case ORANGEFS_VFS_OP_STATFS:
fsid = op->upcall.req.statfs.fs_id;
break;
case ORANGEFS_VFS_OP_TRUNCATE:
fsid = op->upcall.req.truncate.refn.fs_id;
break;
case ORANGEFS_VFS_OP_RA_FLUSH:
fsid = op->upcall.req.ra_cache_flush.refn.fs_id;
break;
case ORANGEFS_VFS_OP_FS_UMOUNT:
fsid = op->upcall.req.fs_umount.fs_id;
break;
case ORANGEFS_VFS_OP_GETXATTR:
fsid = op->upcall.req.getxattr.refn.fs_id;
break;
case ORANGEFS_VFS_OP_SETXATTR:
fsid = op->upcall.req.setxattr.refn.fs_id;
break;
case ORANGEFS_VFS_OP_LISTXATTR:
fsid = op->upcall.req.listxattr.refn.fs_id;
break;
case ORANGEFS_VFS_OP_REMOVEXATTR:
fsid = op->upcall.req.removexattr.refn.fs_id;
break;
case ORANGEFS_VFS_OP_FSYNC:
fsid = op->upcall.req.fsync.refn.fs_id;
break;
default:
break;
}
}
return fsid;
}
static int orangefs_inode_flags(struct ORANGEFS_sys_attr_s *attrs)
{
int flags = 0;
if (attrs->flags & ORANGEFS_IMMUTABLE_FL)
flags |= S_IMMUTABLE;
else
flags &= ~S_IMMUTABLE;
if (attrs->flags & ORANGEFS_APPEND_FL)
flags |= S_APPEND;
else
flags &= ~S_APPEND;
if (attrs->flags & ORANGEFS_NOATIME_FL)
flags |= S_NOATIME;
else
flags &= ~S_NOATIME;
return flags;
}
static int orangefs_inode_perms(struct ORANGEFS_sys_attr_s *attrs)
{
int perm_mode = 0;
if (attrs->perms & ORANGEFS_O_EXECUTE)
perm_mode |= S_IXOTH;
if (attrs->perms & ORANGEFS_O_WRITE)
perm_mode |= S_IWOTH;
if (attrs->perms & ORANGEFS_O_READ)
perm_mode |= S_IROTH;
if (attrs->perms & ORANGEFS_G_EXECUTE)
perm_mode |= S_IXGRP;
if (attrs->perms & ORANGEFS_G_WRITE)
perm_mode |= S_IWGRP;
if (attrs->perms & ORANGEFS_G_READ)
perm_mode |= S_IRGRP;
if (attrs->perms & ORANGEFS_U_EXECUTE)
perm_mode |= S_IXUSR;
if (attrs->perms & ORANGEFS_U_WRITE)
perm_mode |= S_IWUSR;
if (attrs->perms & ORANGEFS_U_READ)
perm_mode |= S_IRUSR;
if (attrs->perms & ORANGEFS_G_SGID)
perm_mode |= S_ISGID;
if (attrs->perms & ORANGEFS_U_SUID)
perm_mode |= S_ISUID;
return perm_mode;
}
/*
* NOTE: in kernel land, we never use the sys_attr->link_target for
* anything, so don't bother copying it into the sys_attr object here.
*/
static inline void copy_attributes_from_inode(struct inode *inode,
struct ORANGEFS_sys_attr_s *attrs)
{
struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
attrs->mask = 0;
if (orangefs_inode->attr_valid & ATTR_UID) {
attrs->owner = from_kuid(&init_user_ns, inode->i_uid);
attrs->mask |= ORANGEFS_ATTR_SYS_UID;
gossip_debug(GOSSIP_UTILS_DEBUG, "(UID) %d\n", attrs->owner);
}
if (orangefs_inode->attr_valid & ATTR_GID) {
attrs->group = from_kgid(&init_user_ns, inode->i_gid);
attrs->mask |= ORANGEFS_ATTR_SYS_GID;
gossip_debug(GOSSIP_UTILS_DEBUG, "(GID) %d\n", attrs->group);
}
if (orangefs_inode->attr_valid & ATTR_ATIME) {
attrs->mask |= ORANGEFS_ATTR_SYS_ATIME;
if (orangefs_inode->attr_valid & ATTR_ATIME_SET) {
attrs->atime = (time64_t) inode_get_atime_sec(inode);
attrs->mask |= ORANGEFS_ATTR_SYS_ATIME_SET;
}
}
if (orangefs_inode->attr_valid & ATTR_MTIME) {
attrs->mask |= ORANGEFS_ATTR_SYS_MTIME;
if (orangefs_inode->attr_valid & ATTR_MTIME_SET) {
attrs->mtime = (time64_t) inode_get_mtime_sec(inode);
attrs->mask |= ORANGEFS_ATTR_SYS_MTIME_SET;
}
}
if (orangefs_inode->attr_valid & ATTR_CTIME)
attrs->mask |= ORANGEFS_ATTR_SYS_CTIME;
/*
* ORANGEFS cannot set size with a setattr operation. Probably not
* likely to be requested through the VFS, but just in case, don't
* worry about ATTR_SIZE
*/
if (orangefs_inode->attr_valid & ATTR_MODE) {
attrs->perms = ORANGEFS_util_translate_mode(inode->i_mode);
attrs->mask |= ORANGEFS_ATTR_SYS_PERM;
}
}
static int orangefs_inode_type(enum orangefs_ds_type objtype)
{
if (objtype == ORANGEFS_TYPE_METAFILE)
return S_IFREG;
else if (objtype == ORANGEFS_TYPE_DIRECTORY)
return S_IFDIR;
else if (objtype == ORANGEFS_TYPE_SYMLINK)
return S_IFLNK;
else
return -1;
}
static void orangefs_make_bad_inode(struct inode *inode)
{
if (is_root_handle(inode)) {
/*
* if this occurs, the pvfs2-client-core was killed but we
* can't afford to lose the inode operations and such
* associated with the root handle in any case.
*/
gossip_debug(GOSSIP_UTILS_DEBUG,
"*** NOT making bad root inode %pU\n",
get_khandle_from_ino(inode));
} else {
gossip_debug(GOSSIP_UTILS_DEBUG,
"*** making bad inode %pU\n",
get_khandle_from_ino(inode));
make_bad_inode(inode);
}
}
static int orangefs_inode_is_stale(struct inode *inode,
struct ORANGEFS_sys_attr_s *attrs, char *link_target)
{
struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
int type = orangefs_inode_type(attrs->objtype);
/*
* If the inode type or symlink target have changed then this
* inode is stale.
*/
if (type == -1 || inode_wrong_type(inode, type)) {
orangefs_make_bad_inode(inode);
return 1;
}
if (type == S_IFLNK && strncmp(orangefs_inode->link_target,
link_target, ORANGEFS_NAME_MAX)) {
orangefs_make_bad_inode(inode);
return 1;
}
return 0;
}
int orangefs_inode_getattr(struct inode *inode, int flags)
{
struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
struct orangefs_kernel_op_s *new_op;
loff_t inode_size;
int ret, type;
gossip_debug(GOSSIP_UTILS_DEBUG, "%s: called on inode %pU flags %d\n",
__func__, get_khandle_from_ino(inode), flags);
again:
spin_lock(&inode->i_lock);
/* Must have all the attributes in the mask and be within cache time. */
if ((!flags && time_before(jiffies, orangefs_inode->getattr_time)) ||
orangefs_inode->attr_valid || inode->i_state & I_DIRTY_PAGES) {
if (orangefs_inode->attr_valid) {
spin_unlock(&inode->i_lock);
write_inode_now(inode, 1);
goto again;
}
spin_unlock(&inode->i_lock);
return 0;
}
spin_unlock(&inode->i_lock);
new_op = op_alloc(ORANGEFS_VFS_OP_GETATTR);
if (!new_op)
return -ENOMEM;
new_op->upcall.req.getattr.refn = orangefs_inode->refn;
/*
* Size is the hardest attribute to get. The incremental cost of any
* other attribute is essentially zero.
*/
if (flags)
new_op->upcall.req.getattr.mask = ORANGEFS_ATTR_SYS_ALL_NOHINT;
else
new_op->upcall.req.getattr.mask =
ORANGEFS_ATTR_SYS_ALL_NOHINT & ~ORANGEFS_ATTR_SYS_SIZE;
ret = service_operation(new_op, __func__,
get_interruptible_flag(inode));
if (ret != 0)
goto out;
again2:
spin_lock(&inode->i_lock);
/* Must have all the attributes in the mask and be within cache time. */
if ((!flags && time_before(jiffies, orangefs_inode->getattr_time)) ||
orangefs_inode->attr_valid || inode->i_state & I_DIRTY_PAGES) {
if (orangefs_inode->attr_valid) {
spin_unlock(&inode->i_lock);
write_inode_now(inode, 1);
goto again2;
}
if (inode->i_state & I_DIRTY_PAGES) {
ret = 0;
goto out_unlock;
}
gossip_debug(GOSSIP_UTILS_DEBUG, "%s: in cache or dirty\n",
__func__);
ret = 0;
goto out_unlock;
}
if (!(flags & ORANGEFS_GETATTR_NEW)) {
ret = orangefs_inode_is_stale(inode,
&new_op->downcall.resp.getattr.attributes,
new_op->downcall.resp.getattr.link_target);
if (ret) {
ret = -ESTALE;
goto out_unlock;
}
}
type = orangefs_inode_type(new_op->
downcall.resp.getattr.attributes.objtype);
switch (type) {
case S_IFREG:
inode->i_flags = orangefs_inode_flags(&new_op->
downcall.resp.getattr.attributes);
if (flags) {
inode_size = (loff_t)new_op->
downcall.resp.getattr.attributes.size;
inode->i_size = inode_size;
inode->i_blkbits = ffs(new_op->downcall.resp.getattr.
attributes.blksize);
inode->i_bytes = inode_size;
inode->i_blocks =
(inode_size + 512 - inode_size % 512)/512;
}
break;
case S_IFDIR:
if (flags) {
inode->i_size = PAGE_SIZE;
inode_set_bytes(inode, inode->i_size);
}
set_nlink(inode, 1);
break;
case S_IFLNK:
if (flags & ORANGEFS_GETATTR_NEW) {
inode->i_size = (loff_t)strlen(new_op->
downcall.resp.getattr.link_target);
ret = strscpy(orangefs_inode->link_target,
new_op->downcall.resp.getattr.link_target,
ORANGEFS_NAME_MAX);
if (ret == -E2BIG) {
ret = -EIO;
goto out_unlock;
}
inode->i_link = orangefs_inode->link_target;
}
break;
/* i.e. -1 */
default:
/* XXX: ESTALE? This is what is done if it is not new. */
orangefs_make_bad_inode(inode);
ret = -ESTALE;
goto out_unlock;
}
inode->i_uid = make_kuid(&init_user_ns, new_op->
downcall.resp.getattr.attributes.owner);
inode->i_gid = make_kgid(&init_user_ns, new_op->
downcall.resp.getattr.attributes.group);
inode_set_atime(inode,
(time64_t)new_op->downcall.resp.getattr.attributes.atime,
0);
inode_set_mtime(inode,
(time64_t)new_op->downcall.resp.getattr.attributes.mtime,
0);
inode_set_ctime(inode,
(time64_t)new_op->downcall.resp.getattr.attributes.ctime,
0);
/* special case: mark the root inode as sticky */
inode->i_mode = type | (is_root_handle(inode) ? S_ISVTX : 0) |
orangefs_inode_perms(&new_op->downcall.resp.getattr.attributes);
orangefs_inode->getattr_time = jiffies +
orangefs_getattr_timeout_msecs*HZ/1000;
ret = 0;
out_unlock:
spin_unlock(&inode->i_lock);
out:
op_release(new_op);
return ret;
}
int orangefs_inode_check_changed(struct inode *inode)
{
struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
struct orangefs_kernel_op_s *new_op;
int ret;
gossip_debug(GOSSIP_UTILS_DEBUG, "%s: called on inode %pU\n", __func__,
get_khandle_from_ino(inode));
new_op = op_alloc(ORANGEFS_VFS_OP_GETATTR);
if (!new_op)
return -ENOMEM;
new_op->upcall.req.getattr.refn = orangefs_inode->refn;
new_op->upcall.req.getattr.mask = ORANGEFS_ATTR_SYS_TYPE |
ORANGEFS_ATTR_SYS_LNK_TARGET;
ret = service_operation(new_op, __func__,
get_interruptible_flag(inode));
if (ret != 0)
goto out;
ret = orangefs_inode_is_stale(inode,
&new_op->downcall.resp.getattr.attributes,
new_op->downcall.resp.getattr.link_target);
out:
op_release(new_op);
return ret;
}
/*
* issues a orangefs setattr request to make sure the new attribute values
* take effect if successful. returns 0 on success; -errno otherwise
*/
int orangefs_inode_setattr(struct inode *inode)
{
struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
struct orangefs_kernel_op_s *new_op;
int ret;
new_op = op_alloc(ORANGEFS_VFS_OP_SETATTR);
if (!new_op)
return -ENOMEM;
spin_lock(&inode->i_lock);
new_op->upcall.uid = from_kuid(&init_user_ns, orangefs_inode->attr_uid);
new_op->upcall.gid = from_kgid(&init_user_ns, orangefs_inode->attr_gid);
new_op->upcall.req.setattr.refn = orangefs_inode->refn;
copy_attributes_from_inode(inode,
&new_op->upcall.req.setattr.attributes);
orangefs_inode->attr_valid = 0;
if (!new_op->upcall.req.setattr.attributes.mask) {
spin_unlock(&inode->i_lock);
op_release(new_op);
return 0;
}
spin_unlock(&inode->i_lock);
ret = service_operation(new_op, __func__,
get_interruptible_flag(inode) | ORANGEFS_OP_WRITEBACK);
gossip_debug(GOSSIP_UTILS_DEBUG,
"orangefs_inode_setattr: returning %d\n", ret);
if (ret)
orangefs_make_bad_inode(inode);
op_release(new_op);
if (ret == 0)
orangefs_inode->getattr_time = jiffies - 1;
return ret;
}
/*
* The following is a very dirty hack that is now a permanent part of the
* 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 received.\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("%s: bad error code :%d:.\n",
__func__,
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("%s: unknown error code.\n", __func__);
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
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