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gfs2: Unstuff before locking page in gfs2_page_mkwrite 

In gfs2_page_mkwrite, unstuff inodes before locking the page.  That
way, we won't have to pass in the locked page to gfs2_unstuff_inode,
and gfs2_unstuff_inode can look up and lock the page itself.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
This commit is contained in:
Andreas Gruenbacher 2021-06-17 23:04:14 +02:00
parent 0fc3bcd6b6
commit 64090cbe4b
1 changed files with 12 additions and 10 deletions
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22
fs/gfs2/file.c
View File

@ -510,30 +510,32 @@ static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf)
goto out_trans_fail;
}
/* Unstuff, if required, and allocate backing blocks for page */
if (gfs2_is_stuffed(ip)) {
err = gfs2_unstuff_dinode(ip, NULL);
if (err) {
ret = block_page_mkwrite_return(err);
goto out_trans_end;
}
}
lock_page(page);
/* If truncated, we must retry the operation, we may have raced
* with the glock demotion code.
*/
if (!PageUptodate(page) || page->mapping != inode->i_mapping) {
ret = VM_FAULT_NOPAGE;
goto out_trans_end;
goto out_page_locked;
}
/* Unstuff, if required, and allocate backing blocks for page */
if (gfs2_is_stuffed(ip)) {
err = gfs2_unstuff_dinode(ip, page);
if (err) {
ret = block_page_mkwrite_return(err);
goto out_trans_end;
}
}
err = gfs2_allocate_page_backing(page, length);
if (err)
ret = block_page_mkwrite_return(err);
out_trans_end:
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);