Commit ee7289bf authored by majianpeng's avatar majianpeng Committed by Sage Weil

ceph: allow sync_read/write return partial successed size of read/write.

For sync_read/write, it may do multi stripe operations.If one of those
met erro, we return the former successed size rather than a error value.
There is a exception for write-operation met -EOLDSNAPC.If this occur,we
retry the whole write again.
Signed-off-by: default avatarJianpeng Ma <>
parent 02ae66d8
......@@ -374,7 +374,7 @@ static int striped_read(struct inode *inode,
goto more;
if (ret >= 0) {
if (read > 0) {
ret = read;
/* did we bounce off eof? */
if (pos + left > inode->i_size)
......@@ -612,6 +612,8 @@ static ssize_t ceph_sync_write(struct file *file, const char __user *data,
if (check_caps)
ceph_check_caps(ceph_inode(inode), CHECK_CAPS_AUTHONLY,
} else if (ret != -EOLDSNAPC && written > 0) {
ret = written;
return ret;
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