actual mtd snapshot and jffs3 questions

[Artem B. Bityuckiy]

On Thu, 23 Dec 2004, Konstantin Kletschke wrote:

> Hi People!
> 
> Today I tried out the actual mtd cvs including jffs2 and jffs3.
> Generally jffs2 works. 
> I switchied compiling of jffs3 on also to test it
> but in jffs3.h are #ifdefs in the lines 296 and
> 310 which I had to comment out.
> 
> #if defined CONFIG_JFFS3_FS_NAND || defined CONFIG_JFFS3_FS_NOR_ECC
> 
> Indeed I have no CONFIG_JFFS3_FS_NAND nor CONFIG_JFFS3_FS_NOR_ECC but
> the code required the members of the struct and compiled fine then.
That are bugs introduced by newly added summary patch. Hope Ferenc will 
fix (may be after holydays).

> 
> Another thing is:
> 
> make -C util
> make: Entering directory `/usr/src/mtd/util'
> gcc -I../include -O2 -Wall -g -c -o sumtool.o sumtool.c -g
> -Wp,-MD,.sumtool.c.dep
> sumtool.c:45:24: jffs3-user.h: No such file or directory
> 
> which is right, no such file :) Forgot cvs add?
Seems yes...

> 
> How do I use jffs3? With a normal jffs2 filesystem created by actual
> mkfs.jffs2?
> I found no mkfs.jffs3 so I tried setting rootfstype=jffs2 to
> rootfstype=jffs3 and booted:
> 
> [JFFS3] Magic bitmask 0x1985 not found at 0x000000: 0x00b0 instead
> [JFFS3] Magic bitmask 0x1985 not found at 0x000004: 0x00b0 instead
> [JFFS3] Magic bitmask 0x1985 not found at 0x000008: 0x00b0 instead
> [JFFS3] Magic bitmask 0x1985 not found at 0x00000c: 0x00b0 instead
> [JFFS3] Magic bitmask 0x1985 not found at 0x000010: 0x00b0 instead
> [JFFS3] Magic bitmask 0x1985 not found at 0x000014: 0x00b0 instead
> [JFFS3] Magic bitmask 0x1985 not found at 0x000018: 0x00b0 instead
> [JFFS3] Magic bitmask 0x1985 not found at 0x00001c: 0x00b0 instead
> [JFFS3] Magic bitmask 0x1985 not found at 0x000020: 0x00b0 instead
> [JFFS3] Magic bitmask 0x1985 not found at 0x000024: 0x00b0 instead
> [JFFS3] Further such events for this erase block will not be printed
> .
> .
> .
> [JFFS3] Cowardly refusing to erase blocks on filesystem with no valid
> JFFS3 nodes
> [JFFS3] Empty blocks 90, bad blocks 0, total blocks 118                          
Strange. Will see. JFFS3 should mount JFFS2 images perfectly.

> VFS: Cannot open root device "mtdblock3" or unknown-block(31,3)
> Please append a correct "root=" boot option                    
> Kernel panic - not syncing: VFS: Unable to mount root fs on
> unknown-block(31,3)
> 
> 
> Regards, Konsti
> 
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--
Best Regards,
Artem B. Bityuckiy,
St.-Petersburg, Russia.