Re: [Yaffs] YAFFS2 in eCOS

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Author: Rutger Hofman
Date:
To: Emmanuel Blot
CC: yaffs
Subject: Re: [Yaffs] YAFFS2 in eCOS

Emmanuel Blot wrote:
>> Hmmm... I am writing/debugging a YAFFS interface layer to get it known as an
>> eCos filesystem. Did you also do that? Is there a way that we can share code
>> and/or work? Our intention is to fully feed the NAND Flash layer and YAFFS2
>> filesystem interface to eCos.
>
> I don't see why we could not :-)
> The back end (NAND vs. SPI flash) is different, but this is not
> relevant for the eCos "VFS" API - I mean the triplet (filesystem op,
> file op, directory op) functions (see below)
>
> I have virtually no time to work on this implementation right now, but
> it does not mean I could not post the code somewhere, for sure.

Did you manage to get YAFFS running, e.g. create a file? Then, I am
extremely interested in your "VFS" implementation.

Rutger

> Cheers,
> Manu
>
> The eCos API for YAFFS2:
>
> // --- Filesystem operations --- > static int yaffs2_fs_mount(cyg_fstab_entry * fste, cyg_mtab_entry * mte); > static int yaffs2_fs_umount(cyg_mtab_entry * mte); > static int yaffs2_fs_open(cyg_mtab_entry * mte, > cyg_dir dir, const char * path, int oflag, > cyg_file * file); > static int yaffs2_fs_unlink(cyg_mtab_entry * mte, > cyg_dir dir, const char * path); > static int yaffs2_fs_mkdir(cyg_mtab_entry * mte, > cyg_dir dir, const char * path); > static int yaffs2_fs_rmdir(cyg_mtab_entry * mte, > cyg_dir dir, const char * path); > static int yaffs2_fs_rename(cyg_mtab_entry * mte, > cyg_dir sdir, const char * spath, > cyg_dir ddir, const char * dpath); > static int yaffs2_fs_link(cyg_mtab_entry * mte, > cyg_dir sdir, const char * spath, > cyg_dir ddir, const char * dpath, int type); > static int yaffs2_fs_opendir(cyg_mtab_entry * mte, > cyg_dir dir, const char * path, cyg_file * fte); > static int yaffs2_fs_chdir(cyg_mtab_entry * mte, > cyg_dir dir, const char * path, cyg_dir * dir_out); > static int yaffs2_fs_stat(cyg_mtab_entry * mte, > cyg_dir dir, const char * name, struct stat * buf); > static int yaffs2_fs_getinfo(cyg_mtab_entry * mte, > cyg_dir dir, const char * path, > int key, void * buf, int len); > static int yaffs2_fs_setinfo(cyg_mtab_entry * mte, > cyg_dir dir, const char * path, > int key, void * buf, int len);

>
> // --- File operations --- > static int yaffs2_fo_read(struct CYG_FILE_TAG * fp, struct CYG_UIO_TAG * uio); > static int yaffs2_fo_write(struct CYG_FILE_TAG * fp, struct CYG_UIO_TAG * uio); > static int yaffs2_fo_lseek(struct CYG_FILE_TAG * fp, off_t * pos, int whence); > static int yaffs2_fo_ioctl(struct CYG_FILE_TAG * fp, CYG_ADDRWORD com, > CYG_ADDRWORD data); > static int yaffs2_fo_fsync(struct CYG_FILE_TAG * fp, int mode); > static int yaffs2_fo_close(struct CYG_FILE_TAG * fp); > static int yaffs2_fo_fstat(struct CYG_FILE_TAG * fp, struct stat * buf); > static int yaffs2_fo_getinfo(struct CYG_FILE_TAG * fp, int key, void * buf, > int len); > static int yaffs2_fo_setinfo(struct CYG_FILE_TAG * fp, int key, void * buf, > int len);

>
> // --- Directory operations --- > static int yaffs2_fo_readdir(struct CYG_FILE_TAG * fp, > struct CYG_UIO_TAG * uio); > static int yaffs2_fo_seekdir(struct CYG_FILE_TAG * fp, off_t * pos, > int whence); > static int yaffs2_fo_closedir(struct CYG_FILE_TAG * fp);

>
> // --- Helpers --- > static yaffs_Object * yaffs2_lookup_dir(yaffs_Object * start, const > char * path, > const char ** name, int symdepth); > static yaffs_Object * yaffs2_lookup_object(yaffs_Object * reldir, > const char * path, int symdepth); > static yaffs_Object * yaffs2_follow_link(yaffs_Object *obj, int symdepth);

>
> static int yaffs2_fs_pathconf(struct cyg_pathconf_info * info); > #ifdef CYGSEM_FILEIO_INFO_DISK_USAGE > static int yaffs2_fs_disk_usage(cyg_mtab_entry * mte, > struct cyg_fs_disk_usage * disk_usage); > #endif // CYGSEM_FILEIO_INFO_DISK_USAGE

>
>
>

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