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head/sys/compat/linuxkpi/common/src/linux_page.c
Show First 20 Lines • Show All 56 Lines • ▼ Show 20 Lines | |||||
#include <vm/uma.h> | #include <vm/uma.h> | ||||
#include <vm/uma_int.h> | #include <vm/uma_int.h> | ||||
#include <linux/gfp.h> | #include <linux/gfp.h> | ||||
#include <linux/mm.h> | #include <linux/mm.h> | ||||
#include <linux/preempt.h> | #include <linux/preempt.h> | ||||
#include <linux/fs.h> | #include <linux/fs.h> | ||||
#include <linux/shmem_fs.h> | |||||
void | void | ||||
si_meminfo(struct sysinfo *si) | si_meminfo(struct sysinfo *si) | ||||
{ | { | ||||
si->totalram = physmem; | si->totalram = physmem; | ||||
si->totalhigh = 0; | si->totalhigh = 0; | ||||
si->mem_unit = PAGE_SIZE; | si->mem_unit = PAGE_SIZE; | ||||
} | } | ||||
▲ Show 20 Lines • Show All 196 Lines • ▼ Show 20 Lines | get_user_pages(unsigned long start, unsigned long nr_pages, int gup_flags, | ||||
return (linux_get_user_pages_internal(map, start, nr_pages, | return (linux_get_user_pages_internal(map, start, nr_pages, | ||||
!!(gup_flags & FOLL_WRITE), pages)); | !!(gup_flags & FOLL_WRITE), pages)); | ||||
} | } | ||||
int | int | ||||
is_vmalloc_addr(const void *addr) | is_vmalloc_addr(const void *addr) | ||||
{ | { | ||||
return (vtoslab((vm_offset_t)addr & ~UMA_SLAB_MASK) != NULL); | return (vtoslab((vm_offset_t)addr & ~UMA_SLAB_MASK) != NULL); | ||||
} | |||||
struct page * | |||||
linux_shmem_read_mapping_page_gfp(vm_object_t obj, int pindex, gfp_t gfp) | |||||
{ | |||||
vm_page_t page; | |||||
int rv; | |||||
if ((gfp & GFP_NOWAIT) != 0) | |||||
panic("GFP_NOWAIT is unimplemented"); | |||||
VM_OBJECT_WLOCK(obj); | |||||
rv = vm_page_grab_valid(&page, obj, pindex, VM_ALLOC_NORMAL | | |||||
VM_ALLOC_NOBUSY | VM_ALLOC_WIRED); | |||||
VM_OBJECT_WUNLOCK(obj); | |||||
if (rv != VM_PAGER_OK) | |||||
return (ERR_PTR(-EINVAL)); | |||||
return (page); | |||||
} | |||||
struct linux_file * | |||||
linux_shmem_file_setup(const char *name, loff_t size, unsigned long flags) | |||||
{ | |||||
struct fileobj { | |||||
struct linux_file file __aligned(sizeof(void *)); | |||||
struct vnode vnode __aligned(sizeof(void *)); | |||||
}; | |||||
struct fileobj *fileobj; | |||||
struct linux_file *filp; | |||||
struct vnode *vp; | |||||
int error; | |||||
fileobj = kzalloc(sizeof(*fileobj), GFP_KERNEL); | |||||
if (fileobj == NULL) { | |||||
error = -ENOMEM; | |||||
goto err_0; | |||||
} | |||||
filp = &fileobj->file; | |||||
vp = &fileobj->vnode; | |||||
filp->f_count = 1; | |||||
filp->f_vnode = vp; | |||||
filp->f_shmem = vm_pager_allocate(OBJT_DEFAULT, NULL, size, | |||||
VM_PROT_READ | VM_PROT_WRITE, 0, curthread->td_ucred); | |||||
if (filp->f_shmem == NULL) { | |||||
error = -ENOMEM; | |||||
goto err_1; | |||||
} | |||||
return (filp); | |||||
err_1: | |||||
kfree(filp); | |||||
err_0: | |||||
return (ERR_PTR(error)); | |||||
} | |||||
static vm_ooffset_t | |||||
linux_invalidate_mapping_pages_sub(vm_object_t obj, vm_pindex_t start, | |||||
vm_pindex_t end, int flags) | |||||
{ | |||||
int start_count, end_count; | |||||
VM_OBJECT_WLOCK(obj); | |||||
start_count = obj->resident_page_count; | |||||
vm_object_page_remove(obj, start, end, flags); | |||||
end_count = obj->resident_page_count; | |||||
VM_OBJECT_WUNLOCK(obj); | |||||
return (start_count - end_count); | |||||
} | |||||
unsigned long | |||||
linux_invalidate_mapping_pages(vm_object_t obj, pgoff_t start, pgoff_t end) | |||||
{ | |||||
return (linux_invalidate_mapping_pages_sub(obj, start, end, OBJPR_CLEANONLY)); | |||||
} | |||||
void | |||||
linux_shmem_truncate_range(vm_object_t obj, loff_t lstart, loff_t lend) | |||||
{ | |||||
vm_pindex_t start = OFF_TO_IDX(lstart + PAGE_SIZE - 1); | |||||
vm_pindex_t end = OFF_TO_IDX(lend + 1); | |||||
(void) linux_invalidate_mapping_pages_sub(obj, start, end, 0); | |||||
} | } |