[PATCH v4 02/14] iommufd/fault: Add an iommufd_fault_init() helper
From: Nicolin Chen <hidden>
Date: 2025-01-03 19:44:30
Also in:
linux-doc, linux-iommu, linux-kselftest, linux-patches, lkml
Subsystem:
iommu subsystem, iommufd, the rest · Maintainers:
Joerg Roedel, Will Deacon, Jason Gunthorpe, Kevin Tian, Linus Torvalds
The infrastructure of a fault object will be shared with a new vEVENTQ object in a following change. Add a helper for a vEVENTQ allocator to call it too. Reorder the iommufd_ctx_get and refcount_inc, to keep them symmetrical with the iommufd_fault_fops_release(). Since the new vEVENTQ doesn't need "response", leave the xa_init_flags in its original location. Reviewed-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Nicolin Chen <redacted> --- drivers/iommu/iommufd/fault.c | 48 ++++++++++++++++++++--------------- 1 file changed, 28 insertions(+), 20 deletions(-)
diff --git a/drivers/iommu/iommufd/fault.c b/drivers/iommu/iommufd/fault.c
index 1fe804e28a86..1d1095fc8224 100644
--- a/drivers/iommu/iommufd/fault.c
+++ b/drivers/iommu/iommufd/fault.c@@ -367,11 +367,35 @@ static const struct file_operations iommufd_fault_fops = { .release = iommufd_fault_fops_release, }; +static int iommufd_fault_init(struct iommufd_fault *fault, char *name, + struct iommufd_ctx *ictx) +{ + struct file *filep; + int fdno; + + mutex_init(&fault->mutex); + INIT_LIST_HEAD(&fault->deliver); + init_waitqueue_head(&fault->wait_queue); + + filep = anon_inode_getfile(name, &iommufd_fault_fops, fault, O_RDWR); + if (IS_ERR(filep)) + return PTR_ERR(filep); + + fault->ictx = ictx; + iommufd_ctx_get(fault->ictx); + fault->filep = filep; + refcount_inc(&fault->obj.users); + + fdno = get_unused_fd_flags(O_CLOEXEC); + if (fdno < 0) + fput(filep); + return fdno; +} + int iommufd_fault_alloc(struct iommufd_ucmd *ucmd) { struct iommu_fault_alloc *cmd = ucmd->cmd; struct iommufd_fault *fault; - struct file *filep; int fdno; int rc;
@@ -382,27 +406,12 @@ int iommufd_fault_alloc(struct iommufd_ucmd *ucmd) if (IS_ERR(fault)) return PTR_ERR(fault); - fault->ictx = ucmd->ictx; - INIT_LIST_HEAD(&fault->deliver); xa_init_flags(&fault->response, XA_FLAGS_ALLOC1); - mutex_init(&fault->mutex); - init_waitqueue_head(&fault->wait_queue); - - filep = anon_inode_getfile("[iommufd-pgfault]", &iommufd_fault_fops, - fault, O_RDWR); - if (IS_ERR(filep)) { - rc = PTR_ERR(filep); - goto out_abort; - } - refcount_inc(&fault->obj.users); - iommufd_ctx_get(fault->ictx); - fault->filep = filep; - - fdno = get_unused_fd_flags(O_CLOEXEC); + fdno = iommufd_fault_init(fault, "[iommufd-pgfault]", ucmd->ictx); if (fdno < 0) { rc = fdno; - goto out_fput; + goto out_abort; } cmd->out_fault_id = fault->obj.id;
@@ -418,8 +427,7 @@ int iommufd_fault_alloc(struct iommufd_ucmd *ucmd) return 0; out_put_fdno: put_unused_fd(fdno); -out_fput: - fput(filep); + fput(fault->filep); out_abort: iommufd_object_abort_and_destroy(ucmd->ictx, &fault->obj);
--
2.43.0