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[LibOS] Convert pseudo filesystem to use inodes #402

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Feb 15, 2022
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[LibOS] Convert pseudo filesystem to use inodes #402

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9 changes: 9 additions & 0 deletions LibOS/shim/include/shim_fs_pseudo.h
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Original file line number Diff line number Diff line change
Expand Up @@ -66,18 +66,27 @@ struct shim_dev_ops {
#define PSEUDO_PERM_FILE_R PERM_r__r__r__ /* default for all other files */
#define PSEUDO_PERM_FILE_RW PERM_rw_rw_rw_

/* Maximum count of created nodes (`pseudo_add_*` calls) */
#define PSEUDO_MAX_NODES 128

/*
* A node of the pseudo filesystem. A single node can describe either a single file, or a family of
* files (see `name_exists` and `list_names` below).
*
* The constructors for `pseudo_node` (`pseudo_add_*`) take arguments for most commonly used fields.
* The node can then be further customized by directly modifying other fields.
*
* NOTE: We assume that all Gramine processes within a single instance create exactly the same set
* of nodes, in the same order, during initialization. This is because we use the node number (`id`)
* for checkpointing.
*/
DEFINE_LIST(pseudo_node);
DEFINE_LISTP(pseudo_node);
struct pseudo_node {
enum pseudo_type type;

unsigned int id;

LIST_TYPE(pseudo_node) siblings;

struct pseudo_node* parent;
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