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authorYan, Zheng <zyan@redhat.com>2015-06-10 17:26:13 +0800
committerIlya Dryomov <idryomov@gmail.com>2015-06-25 11:49:31 +0300
commitf66fd9f0952187d274c13c136b74548f792c1925 (patch)
treec021f04f69b116f2673fdfb2354a99871f8f03a4 /fs/ceph/addr.c
parente548e9b93d3e565e42b938a99804114565be1f81 (diff)
ceph: pre-allocate data structure that tracks caps flushing
Signed-off-by: Yan, Zheng <zyan@redhat.com>
Diffstat (limited to 'fs/ceph/addr.c')
-rw-r--r--fs/ceph/addr.c19
1 files changed, 15 insertions, 4 deletions
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index 5f53ac0d9d7c..7edf3c49e661 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -1308,12 +1308,17 @@ static int ceph_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
struct inode *inode = file_inode(vma->vm_file);
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_file_info *fi = vma->vm_file->private_data;
+ struct ceph_cap_flush *prealloc_cf;
struct page *page = vmf->page;
loff_t off = page_offset(page);
loff_t size = i_size_read(inode);
size_t len;
int want, got, ret;
+ prealloc_cf = ceph_alloc_cap_flush();
+ if (!prealloc_cf)
+ return VM_FAULT_SIGBUS;
+
if (ci->i_inline_version != CEPH_INLINE_NONE) {
struct page *locked_page = NULL;
if (off == 0) {
@@ -1323,8 +1328,10 @@ static int ceph_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
ret = ceph_uninline_data(vma->vm_file, locked_page);
if (locked_page)
unlock_page(locked_page);
- if (ret < 0)
- return VM_FAULT_SIGBUS;
+ if (ret < 0) {
+ ret = VM_FAULT_SIGBUS;
+ goto out_free;
+ }
}
if (off + PAGE_CACHE_SIZE <= size)
@@ -1346,7 +1353,8 @@ static int ceph_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
break;
if (ret != -ERESTARTSYS) {
WARN_ON(1);
- return VM_FAULT_SIGBUS;
+ ret = VM_FAULT_SIGBUS;
+ goto out_free;
}
}
dout("page_mkwrite %p %llu~%zd got cap refs on %s\n",
@@ -1381,7 +1389,8 @@ out:
int dirty;
spin_lock(&ci->i_ceph_lock);
ci->i_inline_version = CEPH_INLINE_NONE;
- dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR);
+ dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR,
+ &prealloc_cf);
spin_unlock(&ci->i_ceph_lock);
if (dirty)
__mark_inode_dirty(inode, dirty);
@@ -1390,6 +1399,8 @@ out:
dout("page_mkwrite %p %llu~%zd dropping cap refs on %s ret %d\n",
inode, off, len, ceph_cap_string(got), ret);
ceph_put_cap_refs(ci, got);
+out_free:
+ ceph_free_cap_flush(prealloc_cf);
return ret;
}