diff options
Diffstat (limited to 'src/kernel/vfs/request.c')
| -rw-r--r-- | src/kernel/vfs/request.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/src/kernel/vfs/request.c b/src/kernel/vfs/request.c index 687f456..277c353 100644 --- a/src/kernel/vfs/request.c +++ b/src/kernel/vfs/request.c @@ -14,7 +14,7 @@ int vfs_request_create(struct vfs_request req_) { process_current->waits4fs.req = req_; req = &process_current->waits4fs.req; - if (!req->backend) + if (!req->backend || !req->backend->potential_handlers) return vfs_request_finish(req, -1); switch (req->backend->type) { @@ -89,10 +89,22 @@ int vfs_request_finish(struct vfs_request *req, int ret) { ret = handle; } - if (req->input.kern) kfree(req->input.buf_kern); + if (req->input.kern) + kfree(req->input.buf_kern); assert(req->caller->state == PS_WAITS4FS || req->caller->state == PS_WAITS4IRQ); process_transition(req->caller, PS_RUNNING); regs_savereturn(&req->caller->regs, ret); return ret; } + +void vfs_request_cancel(struct vfs_request *req, int ret) { + if (req->input.kern) + kfree(req->input.buf_kern); + + // ret must always be negative, so it won't be confused with a success + if (ret > 0) ret = -ret; + if (ret == 0) ret = -1; + regs_savereturn(&req->caller->regs, ret); + process_transition(req->caller, PS_RUNNING); +} |