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Diffstat (limited to 'fs/orangefs/devorangefs-req.c')
| -rw-r--r-- | fs/orangefs/devorangefs-req.c | 10 |
1 files changed, 10 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; } |