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ext4: convert fault handler to use vm_fault_t type

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Return type of ext4_page_mkwrite and ext4_filemap_fault are
changed to use vm_fault_t type.

With this patch all the callers of block_page_mkwrite_return()
are changed to handle vm_fault_t. So converting the return type
of block_page_mkwrite_return() to vm_fault_t.

Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Matthew Wilcox <willy@infradead.org>
This commit is contained in:
Souptick Joarder 2018-10-02 22:20:50 -04:00 committed by Theodore Ts'o
parent 625ef8a3ac
commit 401b25aa1a
3 changed files with 18 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
fs/ext4/ext4.h
View File

@ -2487,8 +2487,8 @@ extern int ext4_writepage_trans_blocks(struct inode *);
extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks);
extern int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode,
loff_t lstart, loff_t lend);
extern int ext4_page_mkwrite(struct vm_fault *vmf);
extern int ext4_filemap_fault(struct vm_fault *vmf);
extern vm_fault_t ext4_page_mkwrite(struct vm_fault *vmf);
extern vm_fault_t ext4_filemap_fault(struct vm_fault *vmf);
extern qsize_t *ext4_get_reserved_space(struct inode *inode);
extern int ext4_get_projid(struct inode *inode, kprojid_t *projid);
extern void ext4_da_release_space(struct inode *inode, int to_free);

29
fs/ext4/inode.c
View File

@ -6184,13 +6184,14 @@ static int ext4_bh_unmapped(handle_t *handle, struct buffer_head *bh)
return !buffer_mapped(bh);
}
int ext4_page_mkwrite(struct vm_fault *vmf)
vm_fault_t ext4_page_mkwrite(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
struct page *page = vmf->page;
loff_t size;
unsigned long len;
int ret;
int err;
vm_fault_t ret;
struct file *file = vma->vm_file;
struct inode *inode = file_inode(file);
struct address_space *mapping = inode->i_mapping;
@ -6203,8 +6204,8 @@ int ext4_page_mkwrite(struct vm_fault *vmf)
down_read(&EXT4_I(inode)->i_mmap_sem);
ret = ext4_convert_inline_data(inode);
if (ret)
err = ext4_convert_inline_data(inode);
if (err)
goto out_ret;
/* Delalloc case is easy... */
@ -6212,9 +6213,9 @@ int ext4_page_mkwrite(struct vm_fault *vmf)
!ext4_should_journal_data(inode) &&
!ext4_nonda_switch(inode->i_sb)) {
do {
ret = block_page_mkwrite(vma, vmf,
err = block_page_mkwrite(vma, vmf,
ext4_da_get_block_prep);
} while (ret == -ENOSPC &&
} while (err == -ENOSPC &&
ext4_should_retry_alloc(inode->i_sb, &retries));
goto out_ret;
}
@ -6259,8 +6260,8 @@ retry_alloc:
ret = VM_FAULT_SIGBUS;
goto out;
}
ret = block_page_mkwrite(vma, vmf, get_block);
if (!ret && ext4_should_journal_data(inode)) {
err = block_page_mkwrite(vma, vmf, get_block);
if (!err && ext4_should_journal_data(inode)) {
if (ext4_walk_page_buffers(handle, page_buffers(page), 0,
PAGE_SIZE, NULL, do_journal_get_write_access)) {
unlock_page(page);
@ -6271,24 +6272,24 @@ retry_alloc:
ext4_set_inode_state(inode, EXT4_STATE_JDATA);
}
ext4_journal_stop(handle);
if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
if (err == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
goto retry_alloc;
out_ret:
ret = block_page_mkwrite_return(ret);
ret = block_page_mkwrite_return(err);
out:
up_read(&EXT4_I(inode)->i_mmap_sem);
sb_end_pagefault(inode->i_sb);
return ret;
}
int ext4_filemap_fault(struct vm_fault *vmf)
vm_fault_t ext4_filemap_fault(struct vm_fault *vmf)
{
struct inode *inode = file_inode(vmf->vma->vm_file);
int err;
vm_fault_t ret;
down_read(&EXT4_I(inode)->i_mmap_sem);
err = filemap_fault(vmf);
ret = filemap_fault(vmf);
up_read(&EXT4_I(inode)->i_mmap_sem);
return err;
return ret;
}

2
include/linux/buffer_head.h
View File

@ -242,7 +242,7 @@ int block_commit_write(struct page *page, unsigned from, unsigned to);
int block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
get_block_t get_block);
/* Convert errno to return value from ->page_mkwrite() call */
static inline int block_page_mkwrite_return(int err)
static inline vm_fault_t block_page_mkwrite_return(int err)
{
if (err == 0)
return VM_FAULT_LOCKED;