diff options
Diffstat (limited to 'drivers/staging/cowloop/cowloop.h')
-rw-r--r-- | drivers/staging/cowloop/cowloop.h | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/drivers/staging/cowloop/cowloop.h b/drivers/staging/cowloop/cowloop.h deleted file mode 100644 index bbd4a35ac66..00000000000 --- a/drivers/staging/cowloop/cowloop.h +++ /dev/null @@ -1,66 +0,0 @@ -/* -** DO NOT MODIFY THESE VALUES (would make old cowfiles unusable) -*/ -#define MAPUNIT 1024 /* blocksize for bit in bitmap */ -#define MUSHIFT 10 /* bitshift for bit in bitmap */ -#define MUMASK 0x3ff /* bitmask for bit in bitmap */ - -#define COWMAGIC 0x574f437f /* byte-swapped '7f C O W' */ -#define COWDIRTY 0x01 -#define COWPACKED 0x02 -#define COWVERSION 1 - -struct cowhead -{ - int magic; /* identifies a cowfile */ - short version; /* version of cowhead */ - short flags; /* flags indicating status */ - unsigned long mapunit; /* blocksize per bit in bitmap */ - unsigned long mapsize; /* total size of bitmap (bytes) */ - unsigned long doffset; /* start-offset datablocks in cow */ - unsigned long rdoblocks; /* size of related read-only file */ - unsigned long rdofingerprint; /* fingerprint of read-only file */ - unsigned long cowused; /* number of datablocks used in cow */ -}; - -#define COWDEVDIR "/dev/cow/" -#define COWDEVICE COWDEVDIR "%ld" -#define COWCONTROL COWDEVDIR "ctl" - -#define MAXCOWS 1024 -#define COWCTL (MAXCOWS-1) /* minor number of /dev/cow/ctl */ - -#define COWPROCDIR "/proc/cow/" -#define COWPROCFILE COWPROCDIR "%d" - -/* -** ioctl related stuff -*/ -#define ANYDEV ((unsigned long)-1) - -struct cowpair -{ - unsigned char *rdofile; /* pathname of the rdofile */ - unsigned char *cowfile; /* pathname of the cowfile */ - unsigned short rdoflen; /* length of rdofile pathname */ - unsigned short cowflen; /* length of cowfile pathname */ - unsigned long device; /* requested/returned device number */ -}; - -struct cowwatch -{ - int flags; /* request flags */ - unsigned long device; /* requested device number */ - unsigned long threshold; /* continue if free Kb < threshold */ - unsigned long totalkb; /* ret: total filesystem size (Kb) */ - unsigned long availkb; /* ret: free filesystem size (Kb) */ -}; - -#define WATCHWAIT 0x01 /* block until threshold reached */ - -#define COWSYNC _IO ('C', 1) -#define COWMKPAIR _IOW ('C', 2, struct cowpair) -#define COWRMPAIR _IOW ('C', 3, unsigned long) -#define COWWATCH _IOW ('C', 4, struct cowwatch) -#define COWCLOSE _IOW ('C', 5, unsigned long) -#define COWRDOPEN _IOW ('C', 6, unsigned long) |