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fs: convert most other generic_file_*mmap() users to .mmap_prepare()

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Update nearly all generic_file_mmap() and generic_file_readonly_mmap()
callers to use generic_file_mmap_prepare() and
generic_file_readonly_mmap_prepare() respectively.

We update blkdev, 9p, afs, erofs, ext2, nfs, ntfs3, smb, ubifs and vboxsf
file systems this way.

Remaining users we cannot yet update are ecryptfs, fuse and cramfs. The
former two are nested file systems that must support any underlying file
ssytem, and cramfs inserts a mixed mapping which currently requires a VMA.

Once all file systems have been converted to mmap_prepare(), we can then
update nested file systems.

Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Link: https://lore.kernel.org/08db85970d89b17a995d2cffae96fb4cc462377f.1750099179.git.lorenzo.stoakes@oracle.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Lorenzo Stoakes
2025-06-16 20:33:28 +01:00
committed by Christian Brauner
parent 951ea2f484
commit 9d5403b103
14 changed files with 75 additions and 70 deletions
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12
fs/ext2/file.c
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@@ -122,17 +122,19 @@ static const struct vm_operations_struct ext2_dax_vm_ops = {
.pfn_mkwrite = ext2_dax_fault,
};
static int ext2_file_mmap(struct file *file, struct vm_area_struct *vma)
static int ext2_file_mmap_prepare(struct vm_area_desc *desc)
{
struct file *file = desc->file;
if (!IS_DAX(file_inode(file)))
return generic_file_mmap(file, vma);
return generic_file_mmap_prepare(desc);
file_accessed(file);
vma->vm_ops = &ext2_dax_vm_ops;
desc->vm_ops = &ext2_dax_vm_ops;
return 0;
}
#else
#define ext2_file_mmap generic_file_mmap
#define ext2_file_mmap_prepare generic_file_mmap_prepare
#endif
/*
@@ -316,7 +318,7 @@ const struct file_operations ext2_file_operations = {
#ifdef CONFIG_COMPAT
.compat_ioctl = ext2_compat_ioctl,
#endif
.mmap = ext2_file_mmap,
.mmap_prepare = ext2_file_mmap_prepare,
.open = ext2_file_open,
.release = ext2_release_file,
.fsync = ext2_fsync,