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Various minor gfs2 cleanups and fixes

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Merge tag 'gfs2-v5.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2

Pull gfs2 updates from Andreas Gruenbacher:
 "Various minor gfs2 cleanups and fixes"

* tag 'gfs2-v5.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
  gfs2: Clean up gfs2_unstuff_dinode
  gfs2: Unstuff before locking page in gfs2_page_mkwrite
  gfs2: Clean up the error handling in gfs2_page_mkwrite
  gfs2: Fix error handling in init_statfs
  gfs2: Fix underflow in gfs2_page_mkwrite
  gfs2: Use list_move_tail instead of list_del/list_add_tail
  gfs2: Fix do_gfs2_set_flags description
This commit is contained in:
Linus Torvalds 2021-06-29 20:23:08 -07:00
commit 8418dabd97
7 changed files with 85 additions and 66 deletions
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62
fs/gfs2/bmap.c
View File

@ -56,14 +56,6 @@ static int gfs2_unstuffer_page(struct gfs2_inode *ip, struct buffer_head *dibh,
u64 block, struct page *page)
{
struct inode *inode = &ip->i_inode;
int release = 0;
if (!page || page->index) {
page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS);
if (!page)
return -ENOMEM;
release = 1;
}
if (!PageUptodate(page)) {
void *kaddr = kmap(page);
@ -97,26 +89,10 @@ static int gfs2_unstuffer_page(struct gfs2_inode *ip, struct buffer_head *dibh,
gfs2_ordered_add_inode(ip);
}
if (release) {
unlock_page(page);
put_page(page);
}
return 0;
}
/**
* gfs2_unstuff_dinode - Unstuff a dinode when the data has grown too big
* @ip: The GFS2 inode to unstuff
* @page: The (optional) page. This is looked up if the @page is NULL
*
* This routine unstuffs a dinode and returns it to a "normal" state such
* that the height can be grown in the traditional way.
*
* Returns: errno
*/
int gfs2_unstuff_dinode(struct gfs2_inode *ip, struct page *page)
static int __gfs2_unstuff_inode(struct gfs2_inode *ip, struct page *page)
{
struct buffer_head *bh, *dibh;
struct gfs2_dinode *di;
@ -124,11 +100,9 @@ int gfs2_unstuff_dinode(struct gfs2_inode *ip, struct page *page)
int isdir = gfs2_is_dir(ip);
int error;
down_write(&ip->i_rw_mutex);
error = gfs2_meta_inode_buffer(ip, &dibh);
if (error)
goto out;
return error;
if (i_size_read(&ip->i_inode)) {
/* Get a free block, fill it with the stuffed data,
@ -170,12 +144,38 @@ int gfs2_unstuff_dinode(struct gfs2_inode *ip, struct page *page)
out_brelse:
brelse(dibh);
return error;
}
/**
* gfs2_unstuff_dinode - Unstuff a dinode when the data has grown too big
* @ip: The GFS2 inode to unstuff
*
* This routine unstuffs a dinode and returns it to a "normal" state such
* that the height can be grown in the traditional way.
*
* Returns: errno
*/
int gfs2_unstuff_dinode(struct gfs2_inode *ip)
{
struct inode *inode = &ip->i_inode;
struct page *page;
int error;
down_write(&ip->i_rw_mutex);
page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS);
error = -ENOMEM;
if (!page)
goto out;
error = __gfs2_unstuff_inode(ip, page);
unlock_page(page);
put_page(page);
out:
up_write(&ip->i_rw_mutex);
return error;
}
/**
* find_metapath - Find path through the metadata tree
* @sdp: The superblock
@ -1079,7 +1079,7 @@ static int gfs2_iomap_begin_write(struct inode *inode, loff_t pos,
goto out_trans_fail;
if (unstuff) {
ret = gfs2_unstuff_dinode(ip, NULL);
ret = gfs2_unstuff_dinode(ip);
if (ret)
goto out_trans_end;
release_metapath(mp);
@ -2143,7 +2143,7 @@ static int do_grow(struct inode *inode, u64 size)
goto do_grow_release;
if (unstuff) {
error = gfs2_unstuff_dinode(ip, NULL);
error = gfs2_unstuff_dinode(ip);
if (error)
goto do_end_trans;
}

2
fs/gfs2/bmap.h
View File

@ -46,7 +46,7 @@ static inline void gfs2_write_calc_reserv(const struct gfs2_inode *ip,
extern const struct iomap_ops gfs2_iomap_ops;
extern const struct iomap_writeback_ops gfs2_writeback_ops;
extern int gfs2_unstuff_dinode(struct gfs2_inode *ip, struct page *page);
extern int gfs2_unstuff_dinode(struct gfs2_inode *ip);
extern int gfs2_block_map(struct inode *inode, sector_t lblock,
struct buffer_head *bh, int create);
extern int gfs2_iomap_get(struct inode *inode, loff_t pos, loff_t length,

2
fs/gfs2/dir.c
View File

@ -172,7 +172,7 @@ static int gfs2_dir_write_data(struct gfs2_inode *ip, const char *buf,
return -EINVAL;
if (gfs2_is_stuffed(ip)) {
error = gfs2_unstuff_dinode(ip, NULL);
error = gfs2_unstuff_dinode(ip);
if (error)
return error;
}

79
fs/gfs2/file.c
View File

@ -210,7 +210,7 @@ void gfs2_set_inode_flags(struct inode *inode)
/**
* do_gfs2_set_flags - set flags on an inode
* @filp: file pointer
* @inode: The inode
* @reqflags: The flags to set
* @mask: Indicates which flags are valid
* @fsflags: The FS_* inode flags passed in
@ -427,22 +427,25 @@ static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf)
struct gfs2_alloc_parms ap = { .aflags = 0, };
u64 offset = page_offset(page);
unsigned int data_blocks, ind_blocks, rblocks;
vm_fault_t ret = VM_FAULT_LOCKED;
struct gfs2_holder gh;
unsigned int length;
loff_t size;
int ret;
int err;
sb_start_pagefault(inode->i_sb);
gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
ret = gfs2_glock_nq(&gh);
if (ret)
err = gfs2_glock_nq(&gh);
if (err) {
ret = block_page_mkwrite_return(err);
goto out_uninit;
}
/* Check page index against inode size */
size = i_size_read(inode);
if (offset >= size) {
ret = -EINVAL;
ret = VM_FAULT_SIGBUS;
goto out_unlock;
}
@ -450,8 +453,8 @@ static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf)
file_update_time(vmf->vma->vm_file);
/* page is wholly or partially inside EOF */
if (offset > size - PAGE_SIZE)
length = offset_in_page(size);
if (size - offset < PAGE_SIZE)
length = size - offset;
else
length = PAGE_SIZE;
@ -469,24 +472,30 @@ static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf)
!gfs2_write_alloc_required(ip, offset, length)) {
lock_page(page);
if (!PageUptodate(page) || page->mapping != inode->i_mapping) {
ret = -EAGAIN;
ret = VM_FAULT_NOPAGE;
unlock_page(page);
}
goto out_unlock;
}
ret = gfs2_rindex_update(sdp);
if (ret)
err = gfs2_rindex_update(sdp);
if (err) {
ret = block_page_mkwrite_return(err);
goto out_unlock;
}
gfs2_write_calc_reserv(ip, length, &data_blocks, &ind_blocks);
ap.target = data_blocks + ind_blocks;
ret = gfs2_quota_lock_check(ip, &ap);
if (ret)
err = gfs2_quota_lock_check(ip, &ap);
if (err) {
ret = block_page_mkwrite_return(err);
goto out_unlock;
ret = gfs2_inplace_reserve(ip, &ap);
if (ret)
}
err = gfs2_inplace_reserve(ip, &ap);
if (err) {
ret = block_page_mkwrite_return(err);
goto out_quota_unlock;
}
rblocks = RES_DINODE + ind_blocks;
if (gfs2_is_jdata(ip))
@ -495,28 +504,38 @@ static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf)
rblocks += RES_STATFS + RES_QUOTA;
rblocks += gfs2_rg_blocks(ip, data_blocks + ind_blocks);
}
ret = gfs2_trans_begin(sdp, rblocks, 0);
if (ret)
err = gfs2_trans_begin(sdp, rblocks, 0);
if (err) {
ret = block_page_mkwrite_return(err);
goto out_trans_fail;
}
/* Unstuff, if required, and allocate backing blocks for page */
if (gfs2_is_stuffed(ip)) {
err = gfs2_unstuff_dinode(ip);
if (err) {
ret = block_page_mkwrite_return(err);
goto out_trans_end;
}
}
lock_page(page);
ret = -EAGAIN;
/* If truncated, we must retry the operation, we may have raced
* with the glock demotion code.
*/
if (!PageUptodate(page) || page->mapping != inode->i_mapping)
goto out_trans_end;
if (!PageUptodate(page) || page->mapping != inode->i_mapping) {
ret = VM_FAULT_NOPAGE;
goto out_page_locked;
}
/* Unstuff, if required, and allocate backing blocks for page */
ret = 0;
if (gfs2_is_stuffed(ip))
ret = gfs2_unstuff_dinode(ip, page);
if (ret == 0)
ret = gfs2_allocate_page_backing(page, length);
err = gfs2_allocate_page_backing(page, length);
if (err)
ret = block_page_mkwrite_return(err);
out_trans_end:
if (ret)
out_page_locked:
if (ret != VM_FAULT_LOCKED)
unlock_page(page);
out_trans_end:
gfs2_trans_end(sdp);
out_trans_fail:
gfs2_inplace_release(ip);
@ -526,12 +545,12 @@ out_unlock:
gfs2_glock_dq(&gh);
out_uninit:
gfs2_holder_uninit(&gh);
if (ret == 0) {
if (ret == VM_FAULT_LOCKED) {
set_page_dirty(page);
wait_for_stable_page(page);
}
sb_end_pagefault(inode->i_sb);
return block_page_mkwrite_return(ret);
return ret;
}
static vm_fault_t gfs2_fault(struct vm_fault *vmf)
@ -962,7 +981,7 @@ static int fallocate_chunk(struct inode *inode, loff_t offset, loff_t len,
gfs2_trans_add_meta(ip->i_gl, dibh);
if (gfs2_is_stuffed(ip)) {
error = gfs2_unstuff_dinode(ip, NULL);
error = gfs2_unstuff_dinode(ip);
if (unlikely(error))
goto out;
}

3
fs/gfs2/glock.c
View File

@ -212,8 +212,7 @@ void gfs2_glock_add_to_lru(struct gfs2_glock *gl)
spin_lock(&lru_lock);
list_del(&gl->gl_lru);
list_add_tail(&gl->gl_lru, &lru_list);
list_move_tail(&gl->gl_lru, &lru_list);
if (!test_bit(GLF_LRU, &gl->gl_flags)) {
set_bit(GLF_LRU, &gl->gl_flags);

1
fs/gfs2/ops_fstype.c
View File

@ -687,6 +687,7 @@ static int init_statfs(struct gfs2_sbd *sdp)
}
iput(pn);
pn = NULL;
ip = GFS2_I(sdp->sd_sc_inode);
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0,
&sdp->sd_sc_gh);

2
fs/gfs2/quota.c
View File

@ -825,7 +825,7 @@ static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
u64 size;
if (gfs2_is_stuffed(ip)) {
err = gfs2_unstuff_dinode(ip, NULL);
err = gfs2_unstuff_dinode(ip);
if (err)
return err;
}