Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-23 04:31:50 +00:00
Code Issues Packages Projects Releases Wiki Activity

NFS: nfs_rename() handle -ERESTARTSYS dentry left behind

Browse Source 
An interrupted rename will leave the old dentry behind if the rename
succeeds.  Fix this by moving the final local work of the rename to
rpc_call_done so that the results of the RENAME can always be handled,
even if the original process has already returned with -ERESTARTSYS.

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Benjamin Coddington 2017-02-01 00:00:07 -05:00 committed by Anna Schumaker
parent 68e33bd6bb
commit 920b4530fb
1 changed files with 25 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
fs/nfs/dir.c
View File

@ -2002,6 +2002,29 @@ nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
} }
EXPORT_SYMBOL_GPL(nfs_link); EXPORT_SYMBOL_GPL(nfs_link);
static void
nfs_complete_rename(struct rpc_task *task, struct nfs_renamedata *data)
{
struct dentry *old_dentry = data->old_dentry;
struct dentry *new_dentry = data->new_dentry;
struct inode *old_inode = d_inode(old_dentry);
struct inode *new_inode = d_inode(new_dentry);
nfs_mark_for_revalidate(old_inode);
switch (task->tk_status) {
case 0:
if (new_inode != NULL)
nfs_drop_nlink(new_inode);
d_move(old_dentry, new_dentry);
nfs_set_verifier(new_dentry,
nfs_save_change_attribute(data->new_dir));
break;
case -ENOENT:
nfs_dentry_handle_enoent(old_dentry);
}
}
/* /*
* RENAME * RENAME
* FIXME: Some nfsds, like the Linux user space nfsd, may generate a * FIXME: Some nfsds, like the Linux user space nfsd, may generate a
@ -2084,7 +2107,8 @@ int nfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (new_inode != NULL) if (new_inode != NULL)
NFS_PROTO(new_inode)->return_delegation(new_inode); NFS_PROTO(new_inode)->return_delegation(new_inode);
task = nfs_async_rename(old_dir, new_dir, old_dentry, new_dentry, NULL); task = nfs_async_rename(old_dir, new_dir, old_dentry, new_dentry,
nfs_complete_rename);
if (IS_ERR(task)) { if (IS_ERR(task)) {
error = PTR_ERR(task); error = PTR_ERR(task);
goto out; goto out;
@ -2094,21 +2118,11 @@ int nfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (error == 0) if (error == 0)
error = task->tk_status; error = task->tk_status;
rpc_put_task(task); rpc_put_task(task);
nfs_mark_for_revalidate(old_inode);
out: out:
if (rehash) if (rehash)
d_rehash(rehash); d_rehash(rehash);
trace_nfs_rename_exit(old_dir, old_dentry, trace_nfs_rename_exit(old_dir, old_dentry,
new_dir, new_dentry, error); new_dir, new_dentry, error);
if (!error) {
if (new_inode != NULL)
nfs_drop_nlink(new_inode);
d_move(old_dentry, new_dentry);
nfs_set_verifier(new_dentry,
nfs_save_change_attribute(new_dir));
} else if (error == -ENOENT)
nfs_dentry_handle_enoent(old_dentry);
/* new dentry created? */ /* new dentry created? */
if (dentry) if (dentry)
dput(dentry); dput(dentry);