Changeset 4c3c4a5 in mainline for uspace/srv/fs/exfat/exfat.h

Timestamp:

2011-06-29T04:04:19Z (13 years ago)

Author:

Oleg Romanenko <romanenko.oleg@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

2fb88ea

Parents:

fcc3cd8

Message:

1. Integrate fat_udx.c as exfat_idx.c
2. Add skeleton for libfs_ops
3. Improve mount/unmount

File:

• uspace/srv/fs/exfat/exfat.h (modified) (4 diffs)

uspace/srv/fs/exfat/exfat.h

@@ -35 +35 @@
 #define EXFAT_FAT_H_
 
+#include "exfat_fat.h"
 #include <fibril_synch.h>
 #include <libfs.h>
@@ -58 +59 @@
 #define DATA_CNT(bs)    uint32_t_le2host(bs->data_clusters)
 #define ROOT_ST(bs)             uint32_t_le2host(bs->rootdir_cluster)
-#define VOL_FLAGS               uint16_t_le2host(bs->volume_flags)
+#define VOL_FLAGS(bs)   uint16_t_le2host(bs->volume_flags)
 
 
@@ -88 +89 @@
 } __attribute__((__packed__)) exfat_bs_t;
 
+typedef enum {
+        EXFAT_DIRECTORY,
+        EXFAT_FILE
+} exfat_node_type_t;
+
+struct exfat_node;
+
+typedef struct {
+        /** Used indices (position) hash table link. */
+        link_t          uph_link;
+        /** Used indices (index) hash table link. */
+        link_t          uih_link;
+
+        fibril_mutex_t  lock;
+        devmap_handle_t devmap_handle;
+        fs_index_t      index;
+        /**
+         * Parent node's first cluster.
+         * Zero is used if this node is not linked, in which case nodep must
+         * contain a pointer to the in-core node structure.
+         * One is used when the parent is the root directory.
+         */
+        exfat_cluster_t pfc;
+        /** Directory entry index within the parent node. */
+        unsigned        pdi;
+        /** Pointer to in-core node instance. */
+        struct exfat_node       *nodep;
+} exfat_idx_t;
+
+/** exFAT in-core node. */
+typedef struct exfat_node {
+        /** Back pointer to the FS node. */
+        fs_node_t               *bp;
+        
+        fibril_mutex_t          lock;
+        exfat_node_type_t       type;
+        exfat_idx_t                     *idx;
+        /**
+         *  Node's first cluster.
+         *  Zero is used for zero-length nodes.
+         *  One is used to mark root directory.
+         */
+        exfat_cluster_t         firstc;
+        /** exFAT in-core node free list link. */
+        link_t                  ffn_link;
+        aoff64_t                size;
+        unsigned                lnkcnt;
+        unsigned                refcnt;
+        bool                    dirty;
+
+        /*
+         * Cache of the node's last and "current" cluster to avoid some
+         * unnecessary FAT walks.
+         */
+        /* Node's last cluster in FAT. */
+        bool            lastc_cached_valid;
+        exfat_cluster_t lastc_cached_value;
+        /* Node's "current" cluster, i.e. where the last I/O took place. */
+        bool            currc_cached_valid;
+        aoff64_t        currc_cached_bn;
+        exfat_cluster_t currc_cached_value;
+} exfat_node_t;
+
 
 extern fs_reg_t exfat_reg;
@@ -95 +159 @@
 extern void exfat_unmounted(ipc_callid_t, ipc_call_t *);
 extern void exfat_unmount(ipc_callid_t, ipc_call_t *);
+extern void exfat_lookup(ipc_callid_t, ipc_call_t *);
+extern void exfat_read(ipc_callid_t, ipc_call_t *);
+extern void exfat_write(ipc_callid_t, ipc_call_t *);
+extern void exfat_truncate(ipc_callid_t, ipc_call_t *);
+extern void exfat_stat(ipc_callid_t, ipc_call_t *);
+extern void exfat_close(ipc_callid_t, ipc_call_t *);
+extern void exfat_destroy(ipc_callid_t, ipc_call_t *);
+extern void exfat_open_node(ipc_callid_t, ipc_call_t *);
+extern void exfat_stat(ipc_callid_t, ipc_call_t *);
+extern void exfat_sync(ipc_callid_t, ipc_call_t *);
+
+extern int exfat_idx_get_new(exfat_idx_t **, devmap_handle_t);
+extern exfat_idx_t *exfat_idx_get_by_pos(devmap_handle_t, exfat_cluster_t, unsigned);
+extern exfat_idx_t *exfat_idx_get_by_index(devmap_handle_t, fs_index_t);
+extern void exfat_idx_destroy(exfat_idx_t *);
+extern void exfat_idx_hashin(exfat_idx_t *);
+extern void exfat_idx_hashout(exfat_idx_t *);
+
+extern int exfat_idx_init(void);
+extern void exfat_idx_fini(void);
+extern int exfat_idx_init_by_devmap_handle(devmap_handle_t);
+extern void exfat_idx_fini_by_devmap_handle(devmap_handle_t);
 
 #endif