diff options
| -rw-r--r-- | fs/orangefs/devorangefs-req.c | 10 | ||||
| -rw-r--r-- | fs/orangefs/orangefs-kernel.h | 2 |
2 files changed, 12 insertions, 0 deletions
diff --git a/fs/orangefs/devorangefs-req.c b/fs/orangefs/devorangefs-req.c index a287a66d94e3..7c40e653e526 100644 --- a/fs/orangefs/devorangefs-req.c +++ b/fs/orangefs/devorangefs-req.c @@ -17,6 +17,8 @@ /* this file implements the /dev/pvfs2-req device node */ +uint32_t userspace_version; + static int open_access_count; #define DUMP_DEVICE_ERROR() \ @@ -387,6 +389,13 @@ static ssize_t orangefs_devreq_write_iter(struct kiocb *iocb, return -EPROTO; } + if (!userspace_version) { + userspace_version = head.version; + } else if (userspace_version != head.version) { + gossip_err("Error: userspace version changes\n"); + return -EPROTO; + } + /* remove the op from the in progress hash table */ op = orangefs_devreq_remove_op(head.tag); if (!op) { @@ -527,6 +536,7 @@ static int orangefs_devreq_release(struct inode *inode, struct file *file) gossip_debug(GOSSIP_DEV_DEBUG, "pvfs2-client-core: device close complete\n"); open_access_count = 0; + userspace_version = 0; mutex_unlock(&devreq_mutex); return 0; } diff --git a/fs/orangefs/orangefs-kernel.h b/fs/orangefs/orangefs-kernel.h index 633c07a6e3d8..ff3566a8388f 100644 --- a/fs/orangefs/orangefs-kernel.h +++ b/fs/orangefs/orangefs-kernel.h @@ -506,6 +506,8 @@ ssize_t orangefs_inode_read(struct inode *inode, /* * defined in devorangefs-req.c */ +extern uint32_t userspace_version; + int orangefs_dev_init(void); void orangefs_dev_cleanup(void); int is_daemon_in_service(void); |