vfs_root Entry Point
Purpose
Returns the root v-node of a virtual file system (VFS).
Syntax
Parameters
| 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. |
Description
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.
Execution Environment
The vfs_root entry point can be called from the process environment only.
Return Values
| Item | Description |
|---|---|
| 0 | Indicates success. |
Nonzero return values are returned from the /usr/include/sys/errno.h file to indicate failure.