vfs: fix symlinkat to retry on ESTALE errors
Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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1 changed files with 7 additions and 2 deletions
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@ -3521,12 +3521,13 @@ SYSCALL_DEFINE3(symlinkat, const char __user *, oldname,
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struct filename *from;
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struct dentry *dentry;
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struct path path;
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unsigned int lookup_flags = 0;
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from = getname(oldname);
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if (IS_ERR(from))
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return PTR_ERR(from);
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dentry = user_path_create(newdfd, newname, &path, 0);
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retry:
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dentry = user_path_create(newdfd, newname, &path, lookup_flags);
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error = PTR_ERR(dentry);
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if (IS_ERR(dentry))
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goto out_putname;
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@ -3535,6 +3536,10 @@ SYSCALL_DEFINE3(symlinkat, const char __user *, oldname,
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if (!error)
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error = vfs_symlink(path.dentry->d_inode, dentry, from->name);
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done_path_create(&path, dentry);
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if (retry_estale(error, lookup_flags)) {
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lookup_flags |= LOOKUP_REVAL;
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goto retry;
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}
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out_putname:
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putname(from);
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return error;
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