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infra: fix readlink

This commit is contained in:
Thomas Schoebel-Theuer 2012-12-17 18:10:22 +01:00 committed by Thomas Schoebel-Theuer
parent e108777ff8
commit f7331fccf3
1 changed files with 12 additions and 11 deletions
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23
sy_old/sy_generic.c
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@ -173,7 +173,7 @@ char *mars_readlink(const char *newpath)
struct path path = {};
mm_segment_t oldfs;
struct inode *inode;
int status;
int status = -ENOMEM;
if (unlikely(!res))
goto done;
@ -184,31 +184,32 @@ char *mars_readlink(const char *newpath)
status = user_path_at(AT_FDCWD, newpath, 0, &path);
if (unlikely(status < 0)) {
MARS_DBG("link '%s' does not exist, status = %d\n", newpath, status);
goto err;
goto done_fs;
}
inode = path.dentry->d_inode;
if (unlikely(!inode)) {
MARS_ERR("link '%s' has invalid inode\n", newpath);
goto err;
status = -EINVAL;
goto done_put;
}
status = inode->i_op->readlink(path.dentry, res, 1024);
if (unlikely(status < 0)) {
MARS_ERR("cannot read link '%s', status = %d\n", newpath, status);
goto err;
}
done_put:
path_put(&path);
done_fs:
set_fs(oldfs);
done:
if (unlikely(status < 0)) {
brick_string_free(res);
res = NULL;
}
return res;
err:
set_fs(oldfs);
brick_string_free(res);
res = NULL;
goto done;
}
EXPORT_SYMBOL_GPL(mars_readlink);