138 lines
4.4 KiB
C
138 lines
4.4 KiB
C
/* fs.h - filesystem manager */
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/*
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* VAS_EBOOT -- GRand Unified Bootloader
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* Copyright (C) 2002,2003,2004,2007,2008,2009 Free Software Foundation, Inc.
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*
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* VAS_EBOOT is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* VAS_EBOOT is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with VAS_EBOOT. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef VAS_EBOOT_FS_HEADER
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#define VAS_EBOOT_FS_HEADER 1
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#include <VasEBoot/device.h>
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#include <VasEBoot/symbol.h>
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#include <VasEBoot/types.h>
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#include <VasEBoot/dl.h>
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#include <VasEBoot/list.h>
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/* For embedding types. */
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#ifdef VAS_EBOOT_UTIL
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#include <VasEBoot/partition.h>
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#endif
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/* Forward declaration is required, because of mutual reference. */
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struct VasEBoot_file;
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struct VasEBoot_dirhook_info
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{
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unsigned dir:1;
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unsigned mtimeset:1;
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unsigned case_insensitive:1;
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unsigned inodeset:1;
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VasEBoot_int64_t mtime;
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VasEBoot_uint64_t inode;
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};
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typedef int (*VasEBoot_fs_dir_hook_t) (const char *filename,
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const struct VasEBoot_dirhook_info *info,
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void *data);
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/* Filesystem descriptor. */
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struct VasEBoot_fs
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{
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/* The next filesystem. */
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struct VasEBoot_fs *next;
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struct VasEBoot_fs **prev;
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/* My name. */
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const char *name;
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/* My module */
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VasEBoot_dl_t mod;
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/* Call HOOK with each file under DIR. */
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VasEBoot_err_t (*fs_dir) (VasEBoot_device_t device, const char *path,
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VasEBoot_fs_dir_hook_t hook, void *hook_data);
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/* Open a file named NAME and initialize FILE. */
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VasEBoot_err_t (*fs_open) (struct VasEBoot_file *file, const char *name);
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/* Read LEN bytes data from FILE into BUF. */
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VasEBoot_ssize_t (*fs_read) (struct VasEBoot_file *file, char *buf, VasEBoot_size_t len);
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/* Close the file FILE. */
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VasEBoot_err_t (*fs_close) (struct VasEBoot_file *file);
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/* Return the label of the device DEVICE in LABEL. The label is
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returned in a VasEBoot_malloc'ed buffer and should be freed by the
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caller. */
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VasEBoot_err_t (*fs_label) (VasEBoot_device_t device, char **label);
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/* Return the uuid of the device DEVICE in UUID. The uuid is
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returned in a VasEBoot_malloc'ed buffer and should be freed by the
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caller. */
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VasEBoot_err_t (*fs_uuid) (VasEBoot_device_t device, char **uuid);
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/* Get writing time of filesystem. */
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VasEBoot_err_t (*fs_mtime) (VasEBoot_device_t device, VasEBoot_int64_t *timebuf);
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#ifdef VAS_EBOOT_UTIL
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/* Determine sectors available for embedding. */
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VasEBoot_err_t (*fs_embed) (VasEBoot_device_t device, unsigned int *nsectors,
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unsigned int max_nsectors,
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VasEBoot_embed_type_t embed_type,
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VasEBoot_disk_addr_t **sectors);
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/* Whether this filesystem reserves first sector for DOS-style boot. */
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int reserved_first_sector;
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/* Whether blocklist installs have a chance to work. */
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int blocklist_install;
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#endif
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};
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typedef struct VasEBoot_fs *VasEBoot_fs_t;
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/* This is special, because block lists are not files in usual sense. */
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extern struct VasEBoot_fs VasEBoot_fs_blocklist;
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/* This hook is used to automatically load filesystem modules.
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If this hook loads a module, return non-zero. Otherwise return zero.
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The newly loaded filesystem is assumed to be inserted into the head of
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the linked list VAS_EBOOT_FS_LIST through the function VasEBoot_fs_register. */
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typedef int (*VasEBoot_fs_autoload_hook_t) (void);
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extern VasEBoot_fs_autoload_hook_t EXPORT_VAR(VasEBoot_fs_autoload_hook);
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extern VasEBoot_fs_t EXPORT_VAR (VasEBoot_fs_list);
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#ifndef VAS_EBOOT_LST_GENERATOR
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static inline void
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VasEBoot_fs_register (VasEBoot_fs_t fs)
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{
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VasEBoot_list_push (VAS_EBOOT_AS_LIST_P (&VasEBoot_fs_list), VAS_EBOOT_AS_LIST (fs));
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}
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#endif
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static inline void
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VasEBoot_fs_unregister (VasEBoot_fs_t fs)
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{
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VasEBoot_list_remove (VAS_EBOOT_AS_LIST (fs));
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}
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#define FOR_FILESYSTEMS(var) FOR_LIST_ELEMENTS((var), (VasEBoot_fs_list))
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VasEBoot_fs_t EXPORT_FUNC(VasEBoot_fs_probe) (VasEBoot_device_t device);
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#define VAS_EBOOT_ENV_BTRFS_OFFSET (256 * 1024)
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#endif /* ! VAS_EBOOT_FS_HEADER */
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