1 files changed, 26 insertions, 87 deletions

diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 5cf327337e22..a4441fb77f7c 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -39,6 +39,9 @@
 #include <linux/uaccess.h>
 #include <linux/sched/mm.h>
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/hugetlbfs.h>
+
 static const struct address_space_operations hugetlbfs_aops;
 static const struct file_operations hugetlbfs_file_operations;
 static const struct inode_operations hugetlbfs_dir_inode_operations;
@@ -110,7 +113,7 @@ static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma)
 	 * way when do_mmap unwinds (may be important on powerpc
 	 * and ia64).
 	 */
-	vm_flags_set(vma, VM_HUGETLB | VM_DONTEXPAND);
+	vm_flags_set(vma, VM_HUGETLB | VM_DONTEXPAND | VM_MTE_ALLOWED);
 	vma->vm_ops = &hugetlb_vm_ops;
 
 	ret = seal_check_write(info->seals, vma);
@@ -171,102 +174,28 @@ out:
  * Called under mmap_write_lock(mm).
  */
 
-static unsigned long
-hugetlb_get_unmapped_area_bottomup(struct file *file, unsigned long addr,
-		unsigned long len, unsigned long pgoff, unsigned long flags)
-{
-	struct hstate *h = hstate_file(file);
-	struct vm_unmapped_area_info info = {};
-
-	info.length = len;
-	info.low_limit = current->mm->mmap_base;
-	info.high_limit = arch_get_mmap_end(addr, len, flags);
-	info.align_mask = PAGE_MASK & ~huge_page_mask(h);
-	return vm_unmapped_area(&info);
-}
-
-static unsigned long
-hugetlb_get_unmapped_area_topdown(struct file *file, unsigned long addr,
-		unsigned long len, unsigned long pgoff, unsigned long flags)
-{
-	struct hstate *h = hstate_file(file);
-	struct vm_unmapped_area_info info = {};
-
-	info.flags = VM_UNMAPPED_AREA_TOPDOWN;
-	info.length = len;
-	info.low_limit = PAGE_SIZE;
-	info.high_limit = arch_get_mmap_base(addr, current->mm->mmap_base);
-	info.align_mask = PAGE_MASK & ~huge_page_mask(h);
-	addr = vm_unmapped_area(&info);
-
-	/*
-	 * A failed mmap() very likely causes application failure,
-	 * so fall back to the bottom-up function here. This scenario
-	 * can happen with large stack limits and large mmap()
-	 * allocations.
-	 */
-	if (unlikely(offset_in_page(addr))) {
-		VM_BUG_ON(addr != -ENOMEM);
-		info.flags = 0;
-		info.low_limit = current->mm->mmap_base;
-		info.high_limit = arch_get_mmap_end(addr, len, flags);
-		addr = vm_unmapped_area(&info);
-	}
-
-	return addr;
-}
-
 unsigned long
-generic_hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
-				  unsigned long len, unsigned long pgoff,
-				  unsigned long flags)
+hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
+			    unsigned long len, unsigned long pgoff,
+			    unsigned long flags)
 {
-	struct mm_struct *mm = current->mm;
-	struct vm_area_struct *vma, *prev;
+	unsigned long addr0 = 0;
 	struct hstate *h = hstate_file(file);
-	const unsigned long mmap_end = arch_get_mmap_end(addr, len, flags);
 
 	if (len & ~huge_page_mask(h))
 		return -EINVAL;
-	if (len > mmap_end - mmap_min_addr)
-		return -ENOMEM;
-
 	if (flags & MAP_FIXED) {
+		if (addr & ~huge_page_mask(h))
+			return -EINVAL;
 		if (prepare_hugepage_range(file, addr, len))
 			return -EINVAL;
-		return addr;
 	}
+	if (addr)
+		addr0 = ALIGN(addr, huge_page_size(h));
 
-	if (addr) {
-		addr = ALIGN(addr, huge_page_size(h));
-		vma = find_vma_prev(mm, addr, &prev);
-		if (mmap_end - len >= addr && addr >= mmap_min_addr &&
-		    (!vma || addr + len <= vm_start_gap(vma)) &&
-		    (!prev || addr >= vm_end_gap(prev)))
-			return addr;
-	}
-
-	/*
-	 * Use MMF_TOPDOWN flag as a hint to use topdown routine.
-	 * If architectures have special needs, they should define their own
-	 * version of hugetlb_get_unmapped_area.
-	 */
-	if (test_bit(MMF_TOPDOWN, &mm->flags))
-		return hugetlb_get_unmapped_area_topdown(file, addr, len,
-				pgoff, flags);
-	return hugetlb_get_unmapped_area_bottomup(file, addr, len,
-			pgoff, flags);
-}
-
-#ifndef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
-static unsigned long
-hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
-			  unsigned long len, unsigned long pgoff,
-			  unsigned long flags)
-{
-	return generic_hugetlb_get_unmapped_area(file, addr, len, pgoff, flags);
+	return mm_get_unmapped_area_vmflags(current->mm, file, addr0, len, pgoff,
+					    flags, 0);
 }
-#endif
 
 /*
  * Someone wants to read @bytes from a HWPOISON hugetlb @page from @offset.
@@ -687,6 +616,7 @@ static void hugetlbfs_evict_inode(struct inode *inode)
 {
 	struct resv_map *resv_map;
 
+	trace_hugetlbfs_evict_inode(inode);
 	remove_inode_hugepages(inode, 0, LLONG_MAX);
 
 	/*
@@ -814,8 +744,10 @@ static long hugetlbfs_fallocate(struct file *file, int mode, loff_t offset,
 	if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
 		return -EOPNOTSUPP;
 
-	if (mode & FALLOC_FL_PUNCH_HOLE)
-		return hugetlbfs_punch_hole(inode, offset, len);
+	if (mode & FALLOC_FL_PUNCH_HOLE) {
+		error = hugetlbfs_punch_hole(inode, offset, len);
+		goto out_nolock;
+	}
 
 	/*
 	 * Default preallocate case.
@@ -919,6 +851,9 @@ static long hugetlbfs_fallocate(struct file *file, int mode, loff_t offset,
 	inode_set_ctime_current(inode);
 out:
 	inode_unlock(inode);
+
+out_nolock:
+	trace_hugetlbfs_fallocate(inode, mode, offset, len, error);
 	return error;
 }
 
@@ -935,6 +870,8 @@ static int hugetlbfs_setattr(struct mnt_idmap *idmap,
 	if (error)
 		return error;
 
+	trace_hugetlbfs_setattr(inode, dentry, attr);
+
 	if (ia_valid & ATTR_SIZE) {
 		loff_t oldsize = inode->i_size;
 		loff_t newsize = attr->ia_size;
@@ -1033,6 +970,7 @@ static struct inode *hugetlbfs_get_inode(struct super_block *sb,
 			break;
 		}
 		lockdep_annotate_inode_mutex_key(inode);
+		trace_hugetlbfs_alloc_inode(inode, dir, mode);
 	} else {
 		if (resv_map)
 			kref_put(&resv_map->refs, resv_map_release);
@@ -1272,6 +1210,7 @@ static struct inode *hugetlbfs_alloc_inode(struct super_block *sb)
 
 static void hugetlbfs_free_inode(struct inode *inode)
 {
+	trace_hugetlbfs_free_inode(inode);
 	kmem_cache_free(hugetlbfs_inode_cachep, HUGETLBFS_I(inode));
 }