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staging: lustre: llite: lock the inode to be migrated 

Because the inode and its connected dentries will be cleared
out of the cache after migration, the inode needs to be locked
during the migration.

Signed-off-by: wang di <di.wang@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4712
Reviewed-on: http://review.whamcloud.com/9689
Reviewed-by: Lai Siyao <lai.siyao@intel.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
wang di 2016-09-18 16:38:50 -04:00 committed by Greg Kroah-Hartman
parent fee58df692
commit 8ef9dbe4b0
1 changed files with 7 additions and 2 deletions
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9
drivers/staging/lustre/lustre/llite/file.c
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@ -2802,11 +2802,15 @@ int ll_migrate(struct inode *parent, struct file *file, int mdtidx,
qstr.name = name;
qstr.len = namelen;
dchild = d_lookup(file_dentry(file), &qstr);
if (dchild && dchild->d_inode) {
if (dchild) {
op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
if (dchild->d_inode) {
child_inode = igrab(dchild->d_inode);
ll_invalidate_aliases(child_inode);
if (child_inode) {
inode_lock(child_inode);
op_data->op_fid3 = *ll_inode2fid(child_inode);
ll_invalidate_aliases(child_inode);
}
}
dput(dchild);
} else {
@ -2847,6 +2851,7 @@ int ll_migrate(struct inode *parent, struct file *file, int mdtidx,
out_free:
if (child_inode) {
clear_nlink(child_inode);
inode_unlock(child_inode);
iput(child_inode);
}