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Commit 56a5d3d

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working on IMFS_initialize
1 parent 4db6b26 commit 56a5d3d

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2 files changed

+67
-0
lines changed

2 files changed

+67
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lines changed

‎cpukit/include/rtems/imfs.h‎

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@@ -150,6 +150,27 @@ struct IMFS_jnode_tt
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const IMFS_node_control *control;
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};
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typedef struct
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{
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const IMFS_mknod_control *directory;
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const IMFS_mknod_control *device;
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const IMFS_mknod_control *file;
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const IMFS_mknod_control *fifo;
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} IMFS_mknod_controls;
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typedef struct
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{
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IMFS_directory_t Root_directory;
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const IMFS_mknod_controls *mknod_controls;
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} IMFS_fs_info_t;
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typedef struct
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{
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IMFS_fs_info_t *fs_info;
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const rtems_filesystem_operations_table *ops;
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const IMFS_mknod_controls *mknod_controls;
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} IMFS_mount_data;
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/*
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* Routines
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*/

‎cpukit/libfs/src/imfs/imfs_init.c‎

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static const rtems_filesystem_operations_table IMFS_ops = {
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.lock_h = rtems_filesystem_default_lock,
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.unlock_h = rtems_filesystem_default_unlock,
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.eval_path_h = IMFS_eval_path,
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.link_h = IMFS_link,
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.are_nodes_equal_h = rtems_filesystem_default_are_nodes_equal,
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.mknod_h = IMFS_mknod,
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.rmnod_h = IMFS_rmnod,
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.fchmod_h = IMFS_fchmod,
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.chown_h = IMFS_chown,
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.clonenod_h = IMFS_node_clone,
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.freenod_h = IMFS_node_free,
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.mount_h = IMFS_mount,
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.unmount_h = IMFS_unmount,
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.fsunmount_me_h = IMFS_fsunmount,
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.utimens_h = IMFS_utimens,
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.symlink_h = IMFS_symlink,
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.readlink_h = IMFS_readlink,
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.rename_h = IMFS_rename,
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.statvfs_h = rtems_filesystem_default_statvfs};
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// 初始化 IMFS 文件系统并挂载到指定挂载点。成功返回 0,失败返回 -1 并设置 errno。
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int IMFS_initialize(
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rtems_filesystem_mount_table_entry_t *mt_entry, // 挂载点表项,描述挂载目标。
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const void *data // 可选的初始化数据(未使用)。
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)
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{
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// 为 IMFS 文件系统信息结构分配并清零内存。
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IMFS_fs_info_t *fs_info = calloc(1, sizeof(*fs_info));
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// 构造挂载所需的初始化数据结构,包括操作集和创建节点控制表。
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IMFS_mount_data mount_data = {
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.fs_info = fs_info, // 文件系统内部信息。
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.ops = &IMFS_ops, // 文件系统操作函数集合。
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.mknod_controls = &IMFS_default_mknod_controls // 创建节点控制信息。
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};
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// 内存分配失败,返回 ENOMEM。
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if (fs_info == NULL)
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{
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rtems_set_errno_and_return_minus_one(ENOMEM);
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}
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// 调用实际支持函数完成文件系统的初始化和挂载。
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return IMFS_initialize_support(mt_entry, &mount_data);
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}

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