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Message-ID: <20180722121636.GA30907@jordon-HP-15-Notebook-PC>
Date: Sun, 22 Jul 2018 17:46:36 +0530
From: Souptick Joarder <jrdr.linux@...il.com>
To: willy@...radead.org, zyan@...hat.com, sage@...hat.com,
idryomov@...il.com
Cc: ceph-devel@...r.kernel.org, linux-kernel@...r.kernel.org,
ajitn.linux@...il.com, brajeswar.linux@...il.com,
sabyasachi.linux@...il.com
Subject: [PATCH] fs: ceph: Adding new return type vm_fault_t
Use new return type vm_fault_t for page_mkwrite
and fault handler.
vmf_error() is the newly introduce inline function
in 4.17
Signed-off-by: Souptick Joarder <jrdr.linux@...il.com>
Reviewed-by: Matthew Wilcox <mawilcox@...rosoft.com>
---
fs/ceph/addr.c | 62 ++++++++++++++++++++++++++++++----------------------------
1 file changed, 32 insertions(+), 30 deletions(-)
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index b4336b4..3031d44 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -1427,7 +1427,7 @@ static void ceph_restore_sigs(sigset_t *oldset)
/*
* vm ops
*/
-static int ceph_filemap_fault(struct vm_fault *vmf)
+static vm_fault_t ceph_filemap_fault(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
struct inode *inode = file_inode(vma->vm_file);
@@ -1435,8 +1435,9 @@ static int ceph_filemap_fault(struct vm_fault *vmf)
struct ceph_file_info *fi = vma->vm_file->private_data;
struct page *pinned_page = NULL;
loff_t off = vmf->pgoff << PAGE_SHIFT;
- int want, got, ret;
+ int want, got, err;
sigset_t oldset;
+ vm_fault_t ret;
ceph_block_sigs(&oldset);
@@ -1448,8 +1449,8 @@ static int ceph_filemap_fault(struct vm_fault *vmf)
want = CEPH_CAP_FILE_CACHE;
got = 0;
- ret = ceph_get_caps(ci, CEPH_CAP_FILE_RD, want, -1, &got, &pinned_page);
- if (ret < 0)
+ err = ceph_get_caps(ci, CEPH_CAP_FILE_RD, want, -1, &got, &pinned_page);
+ if (err < 0)
goto out_restore;
dout("filemap_fault %p %llu~%zd got cap refs on %s\n",
@@ -1461,16 +1462,17 @@ static int ceph_filemap_fault(struct vm_fault *vmf)
ceph_add_rw_context(fi, &rw_ctx);
ret = filemap_fault(vmf);
ceph_del_rw_context(fi, &rw_ctx);
+ dout("filemap_fault %p %llu~%zd drop cap refs %s ret %x\n",
+ inode, off, (size_t)PAGE_SIZE,
+ ceph_cap_string(got), ret);
} else
- ret = -EAGAIN;
+ err = -EAGAIN;
- dout("filemap_fault %p %llu~%zd dropping cap refs on %s ret %d\n",
- inode, off, (size_t)PAGE_SIZE, ceph_cap_string(got), ret);
if (pinned_page)
put_page(pinned_page);
ceph_put_cap_refs(ci, got);
- if (ret != -EAGAIN)
+ if (err != -EAGAIN)
goto out_restore;
/* read inline data */
@@ -1478,7 +1480,6 @@ static int ceph_filemap_fault(struct vm_fault *vmf)
/* does not support inline data > PAGE_SIZE */
ret = VM_FAULT_SIGBUS;
} else {
- int ret1;
struct address_space *mapping = inode->i_mapping;
struct page *page = find_or_create_page(mapping, 0,
mapping_gfp_constraint(mapping,
@@ -1487,32 +1488,32 @@ static int ceph_filemap_fault(struct vm_fault *vmf)
ret = VM_FAULT_OOM;
goto out_inline;
}
- ret1 = __ceph_do_getattr(inode, page,
+ err = __ceph_do_getattr(inode, page,
CEPH_STAT_CAP_INLINE_DATA, true);
- if (ret1 < 0 || off >= i_size_read(inode)) {
+ if (err < 0 || off >= i_size_read(inode)) {
unlock_page(page);
put_page(page);
- if (ret1 < 0)
- ret = ret1;
+ if (err == -ENOMEM)
+ ret = VM_FAULT_OOM;
else
ret = VM_FAULT_SIGBUS;
goto out_inline;
}
- if (ret1 < PAGE_SIZE)
- zero_user_segment(page, ret1, PAGE_SIZE);
+ if (err < PAGE_SIZE)
+ zero_user_segment(page, err, PAGE_SIZE);
else
flush_dcache_page(page);
SetPageUptodate(page);
vmf->page = page;
ret = VM_FAULT_MAJOR | VM_FAULT_LOCKED;
out_inline:
- dout("filemap_fault %p %llu~%zd read inline data ret %d\n",
+ dout("filemap_fault %p %llu~%zd read inline data ret %x\n",
inode, off, (size_t)PAGE_SIZE, ret);
}
out_restore:
ceph_restore_sigs(&oldset);
- if (ret < 0)
- ret = (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;
+ if (err < 0)
+ ret = vmf_error(err);
return ret;
}
@@ -1520,7 +1521,7 @@ static int ceph_filemap_fault(struct vm_fault *vmf)
/*
* Reuse write_begin here for simplicity.
*/
-static int ceph_page_mkwrite(struct vm_fault *vmf)
+static vm_fault_t ceph_page_mkwrite(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
struct inode *inode = file_inode(vma->vm_file);
@@ -1531,8 +1532,9 @@ static int ceph_page_mkwrite(struct vm_fault *vmf)
loff_t off = page_offset(page);
loff_t size = i_size_read(inode);
size_t len;
- int want, got, ret;
+ int want, got, err;
sigset_t oldset;
+ vm_fault_t ret;
prealloc_cf = ceph_alloc_cap_flush();
if (!prealloc_cf)
@@ -1546,10 +1548,10 @@ static int ceph_page_mkwrite(struct vm_fault *vmf)
lock_page(page);
locked_page = page;
}
- ret = ceph_uninline_data(vma->vm_file, locked_page);
+ err = ceph_uninline_data(vma->vm_file, locked_page);
if (locked_page)
unlock_page(locked_page);
- if (ret < 0)
+ if (err < 0)
goto out_free;
}
@@ -1566,9 +1568,9 @@ static int ceph_page_mkwrite(struct vm_fault *vmf)
want = CEPH_CAP_FILE_BUFFER;
got = 0;
- ret = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, off + len,
+ err = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, off + len,
&got, NULL);
- if (ret < 0)
+ if (err < 0)
goto out_free;
dout("page_mkwrite %p %llu~%zd got cap refs on %s\n",
@@ -1586,13 +1588,13 @@ static int ceph_page_mkwrite(struct vm_fault *vmf)
break;
}
- ret = ceph_update_writeable_page(vma->vm_file, off, len, page);
- if (ret >= 0) {
+ err = ceph_update_writeable_page(vma->vm_file, off, len, page);
+ if (err >= 0) {
/* success. we'll keep the page locked. */
set_page_dirty(page);
ret = VM_FAULT_LOCKED;
}
- } while (ret == -EAGAIN);
+ } while (err == -EAGAIN);
if (ret == VM_FAULT_LOCKED ||
ci->i_inline_version != CEPH_INLINE_NONE) {
@@ -1606,14 +1608,14 @@ static int ceph_page_mkwrite(struct vm_fault *vmf)
__mark_inode_dirty(inode, dirty);
}
- dout("page_mkwrite %p %llu~%zd dropping cap refs on %s ret %d\n",
+ dout("page_mkwrite %p %llu~%zd dropping cap refs on %s ret %x\n",
inode, off, len, ceph_cap_string(got), ret);
ceph_put_cap_refs(ci, got);
out_free:
ceph_restore_sigs(&oldset);
ceph_free_cap_flush(prealloc_cf);
- if (ret < 0)
- ret = (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;
+ if (err < 0)
+ ret = vmf_error(err);
return ret;
}
--
1.9.1
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