fs: fix compiler warning ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

implement memmap for mem driver ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

lseek: return -1 for errors and check for that return value ...

We cannot check for < 0 in lseek, otherwise we get problems with files > 0x7fffffff

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

[fs]: set errno correctly for ioctl()

- introduce ioctl call ...

- pass open/close/lseek through to drivers

This is Kconfig cleanup patch (not all configurations will use CFI, SPI, RAMFS and DEVFS). ...

* Enable CFI and SPI drivers menuconfig option to be able to disable them in menuconfig.
* Introduce capability to disable ramfs and devfs.

add missing null pointer check in unlink()

[general] Fixed crash in fs.h, when called with fsdrv.create == NULL ...

When a nor0 devices has no partitions assigned, then a call to
open() to create a file will jump with a NULL fct ptr.

Much more cheching code is missing and pointers to function are
jumped without any NULL ptr check. This must be fixed as well later.

Signed-off-by: Carsten Schlote <c.schlote@konzeptpark.de>

[sparse] declare functions static, use NULL as NULL pointer ...

this fixes:
fs/fs.c:210:6: warning: symbol 'files' was not declared. Should it be static?
fs/fs.c:212:6: warning: symbol 'get_file' was not declared. Should it be static?
fs/fs.c:227:6: warning: symbol 'put_file' was not declared. Should it be static?
fs/fs.c:248:5: warning: symbol 'dir_is_empty' was not declared. Should it be static?
fs/fs.c:613:41: warning: Using plain integer as NULL pointer

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

- Implement tree structure for devices ...

- Use device tree structure to implement partitions
- Let devinfo print a nice tree
- Introduce 'fixed' partitions which are not removable
- Fix mount: It was not possible to mount on a relative path.

use S_ISDIR macro in open()

Use Linux kernel list for drivers and devices instead of handmade ...

list.

export symbols

change files and dirs to rwxrwxrwx

export functions

change files and directories to 0777

remove debug printf, replace with debug

declare lots of functions static

pass file size from read_file

fix bug in ramfs when creating files whose parents do not exist

handle NULL Pointers in readdir/closedir properly

- change function declarations for better standard conformity: ...

int open(const char *pathname, int flags);
-> int open(const char *pathname, int flags, ...);
   int mkdir(const char *pathname);
-> int mkdir(const char *pathname, mode_t mode);

remove unused includes

remove uncompilable filesystems

implement flash protection

implement memmap(). ...

With this function we can get a pointer to directly memory mapped
devices like nor flash or RAM. Useful for bootm where we save one
memcopy when the image is mappable

implement truncate for devfs

svn_rev_706 ...

add file headers

svn_rev_653 ...

restructure tree, add reginfo command

svn_rev_633 ...

add some comments, minor cleanups