forked from luck/tmp_suning_uos_patched
a9a08845e9
This is the mindless scripted replacement of kernel use of POLL*
variables as described by Al, done by this script:
for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do
L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'`
for f in $L; do sed -i "-es/^\([^\"]*\)\(\<POLL$V\>\)/\\1E\\2/" $f; done
done
with de-mangling cleanups yet to come.
NOTE! On almost all architectures, the EPOLL* constants have the same
values as the POLL* constants do. But they keyword here is "almost".
For various bad reasons they aren't the same, and epoll() doesn't
actually work quite correctly in some cases due to this on Sparc et al.
The next patch from Al will sort out the final differences, and we
should be all done.
Scripted-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
843 lines
23 KiB
C
843 lines
23 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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* Changes by Acxiom Corporation to add protocol version to kernel
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* communication, Copyright Acxiom Corporation, 2005.
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*
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* See COPYING in top-level directory.
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*/
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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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#include "orangefs-debugfs.h"
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#include <linux/debugfs.h>
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#include <linux/slab.h>
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/* this file implements the /dev/pvfs2-req device node */
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uint32_t orangefs_userspace_version;
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static int open_access_count;
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static DEFINE_MUTEX(devreq_mutex);
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#define DUMP_DEVICE_ERROR() \
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do { \
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gossip_err("*****************************************************\n");\
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gossip_err("ORANGEFS Device Error: You cannot open the device file "); \
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gossip_err("\n/dev/%s more than once. Please make sure that\nthere " \
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"are no ", ORANGEFS_REQDEVICE_NAME); \
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gossip_err("instances of a program using this device\ncurrently " \
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"running. (You must verify this!)\n"); \
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gossip_err("For example, you can use the lsof program as follows:\n");\
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gossip_err("'lsof | grep %s' (run this as root)\n", \
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ORANGEFS_REQDEVICE_NAME); \
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gossip_err(" open_access_count = %d\n", open_access_count); \
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gossip_err("*****************************************************\n");\
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} while (0)
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static int hash_func(__u64 tag, int table_size)
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{
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return do_div(tag, (unsigned int)table_size);
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}
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static void orangefs_devreq_add_op(struct orangefs_kernel_op_s *op)
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{
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int index = hash_func(op->tag, hash_table_size);
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list_add_tail(&op->list, &orangefs_htable_ops_in_progress[index]);
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}
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/*
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* find the op with this tag and remove it from the in progress
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* hash table.
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*/
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static struct orangefs_kernel_op_s *orangefs_devreq_remove_op(__u64 tag)
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{
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struct orangefs_kernel_op_s *op, *next;
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int index;
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index = hash_func(tag, hash_table_size);
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spin_lock(&orangefs_htable_ops_in_progress_lock);
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list_for_each_entry_safe(op,
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next,
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&orangefs_htable_ops_in_progress[index],
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list) {
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if (op->tag == tag && !op_state_purged(op) &&
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!op_state_given_up(op)) {
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list_del_init(&op->list);
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spin_unlock(&orangefs_htable_ops_in_progress_lock);
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return op;
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}
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}
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spin_unlock(&orangefs_htable_ops_in_progress_lock);
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return NULL;
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}
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/* Returns whether any FS are still pending remounted */
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static int mark_all_pending_mounts(void)
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{
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int unmounted = 1;
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struct orangefs_sb_info_s *orangefs_sb = NULL;
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spin_lock(&orangefs_superblocks_lock);
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list_for_each_entry(orangefs_sb, &orangefs_superblocks, list) {
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/* All of these file system require a remount */
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orangefs_sb->mount_pending = 1;
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unmounted = 0;
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}
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spin_unlock(&orangefs_superblocks_lock);
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return unmounted;
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}
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/*
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* Determine if a given file system needs to be remounted or not
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* Returns -1 on error
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* 0 if already mounted
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* 1 if needs remount
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*/
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static int fs_mount_pending(__s32 fsid)
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{
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int mount_pending = -1;
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struct orangefs_sb_info_s *orangefs_sb = NULL;
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spin_lock(&orangefs_superblocks_lock);
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list_for_each_entry(orangefs_sb, &orangefs_superblocks, list) {
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if (orangefs_sb->fs_id == fsid) {
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mount_pending = orangefs_sb->mount_pending;
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break;
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}
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}
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spin_unlock(&orangefs_superblocks_lock);
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return mount_pending;
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}
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static int orangefs_devreq_open(struct inode *inode, struct file *file)
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{
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int ret = -EINVAL;
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/* in order to ensure that the filesystem driver sees correct UIDs */
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if (file->f_cred->user_ns != &init_user_ns) {
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gossip_err("%s: device cannot be opened outside init_user_ns\n",
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__func__);
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goto out;
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}
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if (!(file->f_flags & O_NONBLOCK)) {
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gossip_err("%s: device cannot be opened in blocking mode\n",
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__func__);
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goto out;
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}
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ret = -EACCES;
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gossip_debug(GOSSIP_DEV_DEBUG, "client-core: opening device\n");
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mutex_lock(&devreq_mutex);
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if (open_access_count == 0) {
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open_access_count = 1;
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ret = 0;
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} else {
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DUMP_DEVICE_ERROR();
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}
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mutex_unlock(&devreq_mutex);
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out:
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gossip_debug(GOSSIP_DEV_DEBUG,
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"pvfs2-client-core: open device complete (ret = %d)\n",
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ret);
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return ret;
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}
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/* Function for read() callers into the device */
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static ssize_t orangefs_devreq_read(struct file *file,
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char __user *buf,
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size_t count, loff_t *offset)
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{
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struct orangefs_kernel_op_s *op, *temp;
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__s32 proto_ver = ORANGEFS_KERNEL_PROTO_VERSION;
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static __s32 magic = ORANGEFS_DEVREQ_MAGIC;
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struct orangefs_kernel_op_s *cur_op;
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unsigned long ret;
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/* We do not support blocking IO. */
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if (!(file->f_flags & O_NONBLOCK)) {
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gossip_err("%s: blocking read from client-core.\n",
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__func__);
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return -EINVAL;
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}
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/*
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* The client will do an ioctl to find MAX_DEV_REQ_UPSIZE, then
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* always read with that size buffer.
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*/
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if (count != MAX_DEV_REQ_UPSIZE) {
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gossip_err("orangefs: client-core tried to read wrong size\n");
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return -EINVAL;
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}
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/* Check for an empty list before locking. */
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if (list_empty(&orangefs_request_list))
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return -EAGAIN;
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restart:
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cur_op = NULL;
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/* Get next op (if any) from top of list. */
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spin_lock(&orangefs_request_list_lock);
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list_for_each_entry_safe(op, temp, &orangefs_request_list, list) {
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__s32 fsid;
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/* This lock is held past the end of the loop when we break. */
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spin_lock(&op->lock);
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if (unlikely(op_state_purged(op) || op_state_given_up(op))) {
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spin_unlock(&op->lock);
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continue;
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}
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fsid = fsid_of_op(op);
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if (fsid != ORANGEFS_FS_ID_NULL) {
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int ret;
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/* Skip ops whose filesystem needs to be mounted. */
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ret = fs_mount_pending(fsid);
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if (ret == 1) {
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gossip_debug(GOSSIP_DEV_DEBUG,
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"%s: mount pending, skipping op tag "
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"%llu %s\n",
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__func__,
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llu(op->tag),
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get_opname_string(op));
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spin_unlock(&op->lock);
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continue;
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/*
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* Skip ops whose filesystem we don't know about unless
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* it is being mounted or unmounted. It is possible for
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* a filesystem we don't know about to be unmounted if
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* it fails to mount in the kernel after userspace has
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* been sent the mount request.
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*/
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/* XXX: is there a better way to detect this? */
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} else if (ret == -1 &&
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!(op->upcall.type ==
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ORANGEFS_VFS_OP_FS_MOUNT ||
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op->upcall.type ==
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ORANGEFS_VFS_OP_GETATTR ||
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op->upcall.type ==
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ORANGEFS_VFS_OP_FS_UMOUNT)) {
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gossip_debug(GOSSIP_DEV_DEBUG,
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"orangefs: skipping op tag %llu %s\n",
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llu(op->tag), get_opname_string(op));
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gossip_err(
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"orangefs: ERROR: fs_mount_pending %d\n",
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fsid);
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spin_unlock(&op->lock);
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continue;
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}
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}
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/*
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* Either this op does not pertain to a filesystem, is mounting
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* a filesystem, or pertains to a mounted filesystem. Let it
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* through.
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*/
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cur_op = op;
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break;
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}
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/*
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* At this point we either have a valid op and can continue or have not
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* found an op and must ask the client to try again later.
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*/
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if (!cur_op) {
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spin_unlock(&orangefs_request_list_lock);
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return -EAGAIN;
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}
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gossip_debug(GOSSIP_DEV_DEBUG, "%s: reading op tag %llu %s\n",
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__func__,
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llu(cur_op->tag),
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get_opname_string(cur_op));
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/*
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* Such an op should never be on the list in the first place. If so, we
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* will abort.
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*/
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if (op_state_in_progress(cur_op) || op_state_serviced(cur_op)) {
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gossip_err("orangefs: ERROR: Current op already queued.\n");
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list_del_init(&cur_op->list);
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spin_unlock(&cur_op->lock);
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spin_unlock(&orangefs_request_list_lock);
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return -EAGAIN;
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}
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list_del_init(&cur_op->list);
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spin_unlock(&orangefs_request_list_lock);
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spin_unlock(&cur_op->lock);
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/* Push the upcall out. */
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ret = copy_to_user(buf, &proto_ver, sizeof(__s32));
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if (ret != 0)
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goto error;
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ret = copy_to_user(buf+sizeof(__s32), &magic, sizeof(__s32));
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if (ret != 0)
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goto error;
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ret = copy_to_user(buf+2 * sizeof(__s32), &cur_op->tag, sizeof(__u64));
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if (ret != 0)
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goto error;
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ret = copy_to_user(buf+2*sizeof(__s32)+sizeof(__u64), &cur_op->upcall,
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sizeof(struct orangefs_upcall_s));
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if (ret != 0)
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goto error;
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spin_lock(&orangefs_htable_ops_in_progress_lock);
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spin_lock(&cur_op->lock);
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if (unlikely(op_state_given_up(cur_op))) {
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spin_unlock(&cur_op->lock);
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spin_unlock(&orangefs_htable_ops_in_progress_lock);
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complete(&cur_op->waitq);
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goto restart;
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}
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/*
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* Set the operation to be in progress and move it between lists since
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* it has been sent to the client.
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*/
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set_op_state_inprogress(cur_op);
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gossip_debug(GOSSIP_DEV_DEBUG,
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"%s: 1 op:%s: op_state:%d: process:%s:\n",
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__func__,
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get_opname_string(cur_op),
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cur_op->op_state,
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current->comm);
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orangefs_devreq_add_op(cur_op);
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spin_unlock(&cur_op->lock);
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spin_unlock(&orangefs_htable_ops_in_progress_lock);
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/* The client only asks to read one size buffer. */
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return MAX_DEV_REQ_UPSIZE;
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error:
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/*
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* We were unable to copy the op data to the client. Put the op back in
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* list. If client has crashed, the op will be purged later when the
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* device is released.
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*/
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gossip_err("orangefs: Failed to copy data to user space\n");
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spin_lock(&orangefs_request_list_lock);
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spin_lock(&cur_op->lock);
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if (likely(!op_state_given_up(cur_op))) {
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set_op_state_waiting(cur_op);
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gossip_debug(GOSSIP_DEV_DEBUG,
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"%s: 2 op:%s: op_state:%d: process:%s:\n",
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__func__,
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get_opname_string(cur_op),
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cur_op->op_state,
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current->comm);
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list_add(&cur_op->list, &orangefs_request_list);
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spin_unlock(&cur_op->lock);
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} else {
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spin_unlock(&cur_op->lock);
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complete(&cur_op->waitq);
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}
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spin_unlock(&orangefs_request_list_lock);
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return -EFAULT;
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}
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/*
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* Function for writev() callers into the device.
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*
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* Userspace should have written:
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* - __u32 version
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* - __u32 magic
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* - __u64 tag
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* - struct orangefs_downcall_s
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* - trailer buffer (in the case of READDIR operations)
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*/
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static ssize_t orangefs_devreq_write_iter(struct kiocb *iocb,
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struct iov_iter *iter)
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{
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ssize_t ret;
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struct orangefs_kernel_op_s *op = NULL;
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struct {
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__u32 version;
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__u32 magic;
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__u64 tag;
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} head;
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int total = ret = iov_iter_count(iter);
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int downcall_size = sizeof(struct orangefs_downcall_s);
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int head_size = sizeof(head);
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gossip_debug(GOSSIP_DEV_DEBUG, "%s: total:%d: ret:%zd:\n",
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__func__,
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total,
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ret);
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if (total < MAX_DEV_REQ_DOWNSIZE) {
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gossip_err("%s: total:%d: must be at least:%u:\n",
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__func__,
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total,
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(unsigned int) MAX_DEV_REQ_DOWNSIZE);
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return -EFAULT;
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}
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if (!copy_from_iter_full(&head, head_size, iter)) {
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gossip_err("%s: failed to copy head.\n", __func__);
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return -EFAULT;
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}
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if (head.version < ORANGEFS_MINIMUM_USERSPACE_VERSION) {
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gossip_err("%s: userspace claims version"
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"%d, minimum version required: %d.\n",
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__func__,
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head.version,
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ORANGEFS_MINIMUM_USERSPACE_VERSION);
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return -EPROTO;
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}
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if (head.magic != ORANGEFS_DEVREQ_MAGIC) {
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gossip_err("Error: Device magic number does not match.\n");
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return -EPROTO;
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}
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if (!orangefs_userspace_version) {
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orangefs_userspace_version = head.version;
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} else if (orangefs_userspace_version != head.version) {
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gossip_err("Error: userspace version changes\n");
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return -EPROTO;
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}
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/* remove the op from the in progress hash table */
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op = orangefs_devreq_remove_op(head.tag);
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if (!op) {
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gossip_debug(GOSSIP_DEV_DEBUG,
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"%s: No one's waiting for tag %llu\n",
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__func__, llu(head.tag));
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return ret;
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}
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if (!copy_from_iter_full(&op->downcall, downcall_size, iter)) {
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gossip_err("%s: failed to copy downcall.\n", __func__);
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goto Efault;
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}
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if (op->downcall.status)
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goto wakeup;
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/*
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* We've successfully peeled off the head and the downcall.
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* Something has gone awry if total doesn't equal the
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* sum of head_size, downcall_size and trailer_size.
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*/
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if ((head_size + downcall_size + op->downcall.trailer_size) != total) {
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gossip_err("%s: funky write, head_size:%d"
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": downcall_size:%d: trailer_size:%lld"
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": total size:%d:\n",
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__func__,
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head_size,
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downcall_size,
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op->downcall.trailer_size,
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total);
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goto Efault;
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}
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/* Only READDIR operations should have trailers. */
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if ((op->downcall.type != ORANGEFS_VFS_OP_READDIR) &&
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(op->downcall.trailer_size != 0)) {
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gossip_err("%s: %x operation with trailer.",
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__func__,
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op->downcall.type);
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goto Efault;
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}
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/* READDIR operations should always have trailers. */
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if ((op->downcall.type == ORANGEFS_VFS_OP_READDIR) &&
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(op->downcall.trailer_size == 0)) {
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gossip_err("%s: %x operation with no trailer.",
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__func__,
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op->downcall.type);
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goto Efault;
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}
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if (op->downcall.type != ORANGEFS_VFS_OP_READDIR)
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goto wakeup;
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op->downcall.trailer_buf = vmalloc(op->downcall.trailer_size);
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if (!op->downcall.trailer_buf)
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goto Enomem;
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memset(op->downcall.trailer_buf, 0, op->downcall.trailer_size);
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if (!copy_from_iter_full(op->downcall.trailer_buf,
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op->downcall.trailer_size, iter)) {
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gossip_err("%s: failed to copy trailer.\n", __func__);
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vfree(op->downcall.trailer_buf);
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goto Efault;
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}
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wakeup:
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/*
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* Return to vfs waitqueue, and back to service_operation
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* through wait_for_matching_downcall.
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*/
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spin_lock(&op->lock);
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if (unlikely(op_is_cancel(op))) {
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spin_unlock(&op->lock);
|
|
put_cancel(op);
|
|
} else if (unlikely(op_state_given_up(op))) {
|
|
spin_unlock(&op->lock);
|
|
complete(&op->waitq);
|
|
} else {
|
|
set_op_state_serviced(op);
|
|
gossip_debug(GOSSIP_DEV_DEBUG,
|
|
"%s: op:%s: op_state:%d: process:%s:\n",
|
|
__func__,
|
|
get_opname_string(op),
|
|
op->op_state,
|
|
current->comm);
|
|
spin_unlock(&op->lock);
|
|
}
|
|
return ret;
|
|
|
|
Efault:
|
|
op->downcall.status = -(ORANGEFS_ERROR_BIT | 9);
|
|
ret = -EFAULT;
|
|
goto wakeup;
|
|
|
|
Enomem:
|
|
op->downcall.status = -(ORANGEFS_ERROR_BIT | 8);
|
|
ret = -ENOMEM;
|
|
goto wakeup;
|
|
}
|
|
|
|
/*
|
|
* NOTE: gets called when the last reference to this device is dropped.
|
|
* Using the open_access_count variable, we enforce a reference count
|
|
* on this file so that it can be opened by only one process at a time.
|
|
* the devreq_mutex is used to make sure all i/o has completed
|
|
* before we call orangefs_bufmap_finalize, and similar such tricky
|
|
* situations
|
|
*/
|
|
static int orangefs_devreq_release(struct inode *inode, struct file *file)
|
|
{
|
|
int unmounted = 0;
|
|
|
|
gossip_debug(GOSSIP_DEV_DEBUG,
|
|
"%s:pvfs2-client-core: exiting, closing device\n",
|
|
__func__);
|
|
|
|
mutex_lock(&devreq_mutex);
|
|
orangefs_bufmap_finalize();
|
|
|
|
open_access_count = -1;
|
|
|
|
unmounted = mark_all_pending_mounts();
|
|
gossip_debug(GOSSIP_DEV_DEBUG, "ORANGEFS Device Close: Filesystem(s) %s\n",
|
|
(unmounted ? "UNMOUNTED" : "MOUNTED"));
|
|
|
|
purge_waiting_ops();
|
|
purge_inprogress_ops();
|
|
|
|
orangefs_bufmap_run_down();
|
|
|
|
gossip_debug(GOSSIP_DEV_DEBUG,
|
|
"pvfs2-client-core: device close complete\n");
|
|
open_access_count = 0;
|
|
orangefs_userspace_version = 0;
|
|
mutex_unlock(&devreq_mutex);
|
|
return 0;
|
|
}
|
|
|
|
int is_daemon_in_service(void)
|
|
{
|
|
int in_service;
|
|
|
|
/*
|
|
* What this function does is checks if client-core is alive
|
|
* based on the access count we maintain on the device.
|
|
*/
|
|
mutex_lock(&devreq_mutex);
|
|
in_service = open_access_count == 1 ? 0 : -EIO;
|
|
mutex_unlock(&devreq_mutex);
|
|
return in_service;
|
|
}
|
|
|
|
bool __is_daemon_in_service(void)
|
|
{
|
|
return open_access_count == 1;
|
|
}
|
|
|
|
static inline long check_ioctl_command(unsigned int command)
|
|
{
|
|
/* Check for valid ioctl codes */
|
|
if (_IOC_TYPE(command) != ORANGEFS_DEV_MAGIC) {
|
|
gossip_err("device ioctl magic numbers don't match! Did you rebuild pvfs2-client-core/libpvfs2? [cmd %x, magic %x != %x]\n",
|
|
command,
|
|
_IOC_TYPE(command),
|
|
ORANGEFS_DEV_MAGIC);
|
|
return -EINVAL;
|
|
}
|
|
/* and valid ioctl commands */
|
|
if (_IOC_NR(command) >= ORANGEFS_DEV_MAXNR || _IOC_NR(command) <= 0) {
|
|
gossip_err("Invalid ioctl command number [%d >= %d]\n",
|
|
_IOC_NR(command), ORANGEFS_DEV_MAXNR);
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static long dispatch_ioctl_command(unsigned int command, unsigned long arg)
|
|
{
|
|
static __s32 magic = ORANGEFS_DEVREQ_MAGIC;
|
|
static __s32 max_up_size = MAX_DEV_REQ_UPSIZE;
|
|
static __s32 max_down_size = MAX_DEV_REQ_DOWNSIZE;
|
|
struct ORANGEFS_dev_map_desc user_desc;
|
|
int ret = 0;
|
|
int upstream_kmod = 1;
|
|
struct orangefs_sb_info_s *orangefs_sb;
|
|
|
|
/* mtmoore: add locking here */
|
|
|
|
switch (command) {
|
|
case ORANGEFS_DEV_GET_MAGIC:
|
|
return ((put_user(magic, (__s32 __user *) arg) == -EFAULT) ?
|
|
-EIO :
|
|
0);
|
|
case ORANGEFS_DEV_GET_MAX_UPSIZE:
|
|
return ((put_user(max_up_size,
|
|
(__s32 __user *) arg) == -EFAULT) ?
|
|
-EIO :
|
|
0);
|
|
case ORANGEFS_DEV_GET_MAX_DOWNSIZE:
|
|
return ((put_user(max_down_size,
|
|
(__s32 __user *) arg) == -EFAULT) ?
|
|
-EIO :
|
|
0);
|
|
case ORANGEFS_DEV_MAP:
|
|
ret = copy_from_user(&user_desc,
|
|
(struct ORANGEFS_dev_map_desc __user *)
|
|
arg,
|
|
sizeof(struct ORANGEFS_dev_map_desc));
|
|
/* WTF -EIO and not -EFAULT? */
|
|
return ret ? -EIO : orangefs_bufmap_initialize(&user_desc);
|
|
case ORANGEFS_DEV_REMOUNT_ALL:
|
|
gossip_debug(GOSSIP_DEV_DEBUG,
|
|
"%s: got ORANGEFS_DEV_REMOUNT_ALL\n",
|
|
__func__);
|
|
|
|
/*
|
|
* remount all mounted orangefs volumes to regain the lost
|
|
* dynamic mount tables (if any) -- NOTE: this is done
|
|
* without keeping the superblock list locked due to the
|
|
* upcall/downcall waiting. also, the request mutex is
|
|
* used to ensure that no operations will be serviced until
|
|
* all of the remounts are serviced (to avoid ops between
|
|
* mounts to fail)
|
|
*/
|
|
ret = mutex_lock_interruptible(&orangefs_request_mutex);
|
|
if (ret < 0)
|
|
return ret;
|
|
gossip_debug(GOSSIP_DEV_DEBUG,
|
|
"%s: priority remount in progress\n",
|
|
__func__);
|
|
spin_lock(&orangefs_superblocks_lock);
|
|
list_for_each_entry(orangefs_sb, &orangefs_superblocks, list) {
|
|
/*
|
|
* We have to drop the spinlock, so entries can be
|
|
* removed. They can't be freed, though, so we just
|
|
* keep the forward pointers and zero the back ones -
|
|
* that way we can get to the rest of the list.
|
|
*/
|
|
if (!orangefs_sb->list.prev)
|
|
continue;
|
|
gossip_debug(GOSSIP_DEV_DEBUG,
|
|
"%s: Remounting SB %p\n",
|
|
__func__,
|
|
orangefs_sb);
|
|
|
|
spin_unlock(&orangefs_superblocks_lock);
|
|
ret = orangefs_remount(orangefs_sb);
|
|
spin_lock(&orangefs_superblocks_lock);
|
|
if (ret) {
|
|
gossip_debug(GOSSIP_DEV_DEBUG,
|
|
"SB %p remount failed\n",
|
|
orangefs_sb);
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock(&orangefs_superblocks_lock);
|
|
gossip_debug(GOSSIP_DEV_DEBUG,
|
|
"%s: priority remount complete\n",
|
|
__func__);
|
|
mutex_unlock(&orangefs_request_mutex);
|
|
return ret;
|
|
|
|
case ORANGEFS_DEV_UPSTREAM:
|
|
ret = copy_to_user((void __user *)arg,
|
|
&upstream_kmod,
|
|
sizeof(upstream_kmod));
|
|
|
|
if (ret != 0)
|
|
return -EIO;
|
|
else
|
|
return ret;
|
|
|
|
case ORANGEFS_DEV_CLIENT_MASK:
|
|
return orangefs_debugfs_new_client_mask((void __user *)arg);
|
|
case ORANGEFS_DEV_CLIENT_STRING:
|
|
return orangefs_debugfs_new_client_string((void __user *)arg);
|
|
case ORANGEFS_DEV_DEBUG:
|
|
return orangefs_debugfs_new_debug((void __user *)arg);
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
static long orangefs_devreq_ioctl(struct file *file,
|
|
unsigned int command, unsigned long arg)
|
|
{
|
|
long ret;
|
|
|
|
/* Check for properly constructed commands */
|
|
ret = check_ioctl_command(command);
|
|
if (ret < 0)
|
|
return (int)ret;
|
|
|
|
return (int)dispatch_ioctl_command(command, arg);
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT /* CONFIG_COMPAT is in .config */
|
|
|
|
/* Compat structure for the ORANGEFS_DEV_MAP ioctl */
|
|
struct ORANGEFS_dev_map_desc32 {
|
|
compat_uptr_t ptr;
|
|
__s32 total_size;
|
|
__s32 size;
|
|
__s32 count;
|
|
};
|
|
|
|
static unsigned long translate_dev_map26(unsigned long args, long *error)
|
|
{
|
|
struct ORANGEFS_dev_map_desc32 __user *p32 = (void __user *)args;
|
|
/*
|
|
* Depending on the architecture, allocate some space on the
|
|
* user-call-stack based on our expected layout.
|
|
*/
|
|
struct ORANGEFS_dev_map_desc __user *p =
|
|
compat_alloc_user_space(sizeof(*p));
|
|
compat_uptr_t addr;
|
|
|
|
*error = 0;
|
|
/* get the ptr from the 32 bit user-space */
|
|
if (get_user(addr, &p32->ptr))
|
|
goto err;
|
|
/* try to put that into a 64-bit layout */
|
|
if (put_user(compat_ptr(addr), &p->ptr))
|
|
goto err;
|
|
/* copy the remaining fields */
|
|
if (copy_in_user(&p->total_size, &p32->total_size, sizeof(__s32)))
|
|
goto err;
|
|
if (copy_in_user(&p->size, &p32->size, sizeof(__s32)))
|
|
goto err;
|
|
if (copy_in_user(&p->count, &p32->count, sizeof(__s32)))
|
|
goto err;
|
|
return (unsigned long)p;
|
|
err:
|
|
*error = -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 32 bit user-space apps' ioctl handlers when kernel modules
|
|
* is compiled as a 64 bit one
|
|
*/
|
|
static long orangefs_devreq_compat_ioctl(struct file *filp, unsigned int cmd,
|
|
unsigned long args)
|
|
{
|
|
long ret;
|
|
unsigned long arg = args;
|
|
|
|
/* Check for properly constructed commands */
|
|
ret = check_ioctl_command(cmd);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (cmd == ORANGEFS_DEV_MAP) {
|
|
/*
|
|
* convert the arguments to what we expect internally
|
|
* in kernel space
|
|
*/
|
|
arg = translate_dev_map26(args, &ret);
|
|
if (ret < 0) {
|
|
gossip_err("Could not translate dev map\n");
|
|
return ret;
|
|
}
|
|
}
|
|
/* no other ioctl requires translation */
|
|
return dispatch_ioctl_command(cmd, arg);
|
|
}
|
|
|
|
#endif /* CONFIG_COMPAT is in .config */
|
|
|
|
/* the assigned character device major number */
|
|
static int orangefs_dev_major;
|
|
|
|
/*
|
|
* Initialize orangefs device specific state:
|
|
* Must be called at module load time only
|
|
*/
|
|
int orangefs_dev_init(void)
|
|
{
|
|
/* register orangefs-req device */
|
|
orangefs_dev_major = register_chrdev(0,
|
|
ORANGEFS_REQDEVICE_NAME,
|
|
&orangefs_devreq_file_operations);
|
|
if (orangefs_dev_major < 0) {
|
|
gossip_debug(GOSSIP_DEV_DEBUG,
|
|
"Failed to register /dev/%s (error %d)\n",
|
|
ORANGEFS_REQDEVICE_NAME, orangefs_dev_major);
|
|
return orangefs_dev_major;
|
|
}
|
|
|
|
gossip_debug(GOSSIP_DEV_DEBUG,
|
|
"*** /dev/%s character device registered ***\n",
|
|
ORANGEFS_REQDEVICE_NAME);
|
|
gossip_debug(GOSSIP_DEV_DEBUG, "'mknod /dev/%s c %d 0'.\n",
|
|
ORANGEFS_REQDEVICE_NAME, orangefs_dev_major);
|
|
return 0;
|
|
}
|
|
|
|
void orangefs_dev_cleanup(void)
|
|
{
|
|
unregister_chrdev(orangefs_dev_major, ORANGEFS_REQDEVICE_NAME);
|
|
gossip_debug(GOSSIP_DEV_DEBUG,
|
|
"*** /dev/%s character device unregistered ***\n",
|
|
ORANGEFS_REQDEVICE_NAME);
|
|
}
|
|
|
|
static __poll_t orangefs_devreq_poll(struct file *file,
|
|
struct poll_table_struct *poll_table)
|
|
{
|
|
__poll_t poll_revent_mask = 0;
|
|
|
|
poll_wait(file, &orangefs_request_list_waitq, poll_table);
|
|
|
|
if (!list_empty(&orangefs_request_list))
|
|
poll_revent_mask |= EPOLLIN;
|
|
return poll_revent_mask;
|
|
}
|
|
|
|
const struct file_operations orangefs_devreq_file_operations = {
|
|
.owner = THIS_MODULE,
|
|
.read = orangefs_devreq_read,
|
|
.write_iter = orangefs_devreq_write_iter,
|
|
.open = orangefs_devreq_open,
|
|
.release = orangefs_devreq_release,
|
|
.unlocked_ioctl = orangefs_devreq_ioctl,
|
|
|
|
#ifdef CONFIG_COMPAT /* CONFIG_COMPAT is in .config */
|
|
.compat_ioctl = orangefs_devreq_compat_ioctl,
|
|
#endif
|
|
.poll = orangefs_devreq_poll
|
|
};
|