Returns the root v-node of a virtual file system (VFS).
| Item | Description |
|---|---|
| vfsp | Points to the vfs structure. |
| vpp | Points to the place to return the v-node pointer. |
| crp | Points to the cred structure. This structure contains data that the file system can use to validate access permission. |
The vfs_root entry point is invoked by the logical file system to get a pointer to the root v-node of the file system. When successful, the vpp parameter points to the root virtual node (v-node) and the v-node hold count is incremented.
The vfs_root entry point can be called from the process environment only.
| Item | Description |
|---|---|
| 0 | Indicates success. |
Nonzero return values are returned from the /usr/include/sys/errno.h file to indicate failure.
Virtual File System Overview, Virtual File System Kernel Extensions Overview, Understanding Data Structures and Header Files for Virtual File Systems, Logical File System Overview, Understanding Virtual Nodes (V-nodes) in AIX® Version 7.1 Kernel Extensions and Device Support Programming Concepts.