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for-4.18-part2-tag 

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Merge tag 'for-4.18-part2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs fixes from David Sterba:

 - error handling fixup for one of the new ioctls from 1st pull

 - fix for device-replace that incorrectly uses inode pages and can mess
   up compressed extents in some cases

 - fiemap fix for reporting incorrect number of extents

 - vm_fault_t type conversion

* tag 'for-4.18-part2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: scrub: Don't use inode pages for device replace
  btrfs: change return type of btrfs_page_mkwrite to vm_fault_t
  Btrfs: fiemap: pass correct bytenr when fm_extent_count is zero
  btrfs: Check error of btrfs_iget in btrfs_search_path_in_tree_user
This commit is contained in:
Linus Torvalds 2018-06-15 07:23:00 +09:00
parent d148eac0e7 ac0b4145d6
commit e7655d2b25
5 changed files with 19 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
fs/btrfs/ctree.h
View File

@ -3197,7 +3197,7 @@ int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
size_t size, struct bio *bio,
unsigned long bio_flags);
void btrfs_set_range_writeback(void *private_data, u64 start, u64 end);
int btrfs_page_mkwrite(struct vm_fault *vmf);
vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
int btrfs_readpage(struct file *file, struct page *page);
void btrfs_evict_inode(struct inode *inode);
int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);

4
fs/btrfs/extent_io.c
View File

@ -4542,7 +4542,7 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
offset_in_extent = em_start - em->start;
em_end = extent_map_end(em);
em_len = em_end - em_start;
disko = 0;
disko = em->block_start + offset_in_extent;
flags = 0;
/*
@ -4565,8 +4565,6 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
u64 bytenr = em->block_start -
(em->start - em->orig_start);
disko = em->block_start + offset_in_extent;
/*
* As btrfs supports shared space, this information
* can be exported to userspace tools via

26
fs/btrfs/inode.c
View File

@ -8872,7 +8872,7 @@ again:
* beyond EOF, then the page is guaranteed safe against truncation until we
* unlock the page.
*/
int btrfs_page_mkwrite(struct vm_fault *vmf)
vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf)
{
struct page *page = vmf->page;
struct inode *inode = file_inode(vmf->vma->vm_file);
@ -8884,7 +8884,8 @@ int btrfs_page_mkwrite(struct vm_fault *vmf)
char *kaddr;
unsigned long zero_start;
loff_t size;
int ret;
vm_fault_t ret;
int ret2;
int reserved = 0;
u64 reserved_space;
u64 page_start;
@ -8906,17 +8907,14 @@ int btrfs_page_mkwrite(struct vm_fault *vmf)
* end up waiting indefinitely to get a lock on the page currently
* being processed by btrfs_page_mkwrite() function.
*/
ret = btrfs_delalloc_reserve_space(inode, &data_reserved, page_start,
ret2 = btrfs_delalloc_reserve_space(inode, &data_reserved, page_start,
reserved_space);
if (!ret) {
ret = file_update_time(vmf->vma->vm_file);
if (!ret2) {
ret2 = file_update_time(vmf->vma->vm_file);
reserved = 1;
}
if (ret) {
if (ret == -ENOMEM)
ret = VM_FAULT_OOM;
else /* -ENOSPC, -EIO, etc */
ret = VM_FAULT_SIGBUS;
if (ret2) {
ret = vmf_error(ret2);
if (reserved)
goto out;
goto out_noreserve;
@ -8975,15 +8973,15 @@ again:
EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG,
0, 0, &cached_state);
ret = btrfs_set_extent_delalloc(inode, page_start, end, 0,
ret2 = btrfs_set_extent_delalloc(inode, page_start, end, 0,
&cached_state, 0);
if (ret) {
if (ret2) {
unlock_extent_cached(io_tree, page_start, page_end,
&cached_state);
ret = VM_FAULT_SIGBUS;
goto out_unlock;
}
ret = 0;
ret2 = 0;
/* page is wholly or partially inside EOF */
if (page_start + PAGE_SIZE > size)
@ -9008,7 +9006,7 @@ again:
unlock_extent_cached(io_tree, page_start, page_end, &cached_state);
out_unlock:
if (!ret) {
if (!ret2) {
btrfs_delalloc_release_extents(BTRFS_I(inode), PAGE_SIZE, true);
sb_end_pagefault(inode->i_sb);
extent_changeset_free(data_reserved);

4
fs/btrfs/ioctl.c
View File

@ -2438,6 +2438,10 @@ static int btrfs_search_path_in_tree_user(struct inode *inode,
}
temp_inode = btrfs_iget(sb, &key2, root, NULL);
if (IS_ERR(temp_inode)) {
ret = PTR_ERR(temp_inode);
goto out;
}
ret = inode_permission(temp_inode, MAY_READ | MAY_EXEC);
iput(temp_inode);
if (ret) {

2
fs/btrfs/scrub.c
View File

@ -2799,7 +2799,7 @@ static int scrub_extent(struct scrub_ctx *sctx, struct map_lookup *map,
have_csum = scrub_find_csum(sctx, logical, csum);
if (have_csum == 0)
++sctx->stat.no_csum;
if (sctx->is_dev_replace && !have_csum) {
if (0 && sctx->is_dev_replace && !have_csum) {
ret = copy_nocow_pages(sctx, logical, l,
mirror_num,
physical_for_dev_replace);