diff options
| author | phk <phk@FreeBSD.org> | 1998-09-05 14:13:12 +0000 |
|---|---|---|
| committer | phk <phk@FreeBSD.org> | 1998-09-05 14:13:12 +0000 |
| commit | 4630814c8bc51e668f785289086657fbd5e775f2 (patch) | |
| tree | e5449931fffd8e8dd0e4d28f5b7b28dc6e36ba5c /sys/kern | |
| parent | ec3c90cf78eb16d4a8906a64e2a6f76cf27b8441 (diff) | |
| download | FreeBSD-src-4630814c8bc51e668f785289086657fbd5e775f2.zip FreeBSD-src-4630814c8bc51e668f785289086657fbd5e775f2.tar.gz | |
Add a new vnode op, VOP_FREEBLKS(), which filesystems can use to inform
device drivers about sectors no longer in use.
Device-drivers receive the call through d_strategy, if they have
D_CANFREE in d_flags.
This allows flash based devices to erase the sectors and avoid
pointlessly carrying them around in compactions.
Reviewed by: Kirk Mckusick, bde
Sponsored by: M-Systems (www.m-sys.com)
Diffstat (limited to 'sys/kern')
| -rw-r--r-- | sys/kern/vfs_bio.c | 19 | ||||
| -rw-r--r-- | sys/kern/vnode_if.src | 16 |
2 files changed, 25 insertions, 10 deletions
diff --git a/sys/kern/vfs_bio.c b/sys/kern/vfs_bio.c index 06130f9..6db20aa2 100644 --- a/sys/kern/vfs_bio.c +++ b/sys/kern/vfs_bio.c @@ -11,7 +11,7 @@ * 2. Absolutely no warranty of function or purpose is made by the author * John S. Dyson. * - * $Id: vfs_bio.c,v 1.173 1998/08/28 20:07:13 luoqi Exp $ + * $Id: vfs_bio.c,v 1.174 1998/09/04 08:06:55 dfr Exp $ */ /* @@ -587,14 +587,14 @@ brelse(struct buf * bp) if (bp->b_flags & B_LOCKED) bp->b_flags &= ~B_ERROR; - if ((bp->b_flags & (B_NOCACHE | B_INVAL | B_ERROR)) || + if ((bp->b_flags & (B_NOCACHE | B_INVAL | B_ERROR | B_FREEBUF)) || (bp->b_bufsize <= 0)) { bp->b_flags |= B_INVAL; if (LIST_FIRST(&bp->b_dep) != NULL && bioops.io_deallocate) (*bioops.io_deallocate)(bp); if (bp->b_flags & B_DELWRI) --numdirtybuffers; - bp->b_flags &= ~(B_DELWRI | B_CACHE); + bp->b_flags &= ~(B_DELWRI | B_CACHE | B_FREEBUF); if ((bp->b_flags & B_VMIO) == 0) { if (bp->b_bufsize) allocbuf(bp, 0); @@ -1895,6 +1895,12 @@ biodone(register struct buf * bp) } bp->b_flags |= B_DONE; + if (bp->b_flags & B_FREEBUF) { + brelse(bp); + splx(s); + return; + } + if ((bp->b_flags & B_READ) == 0) { vwakeup(bp); } @@ -2415,12 +2421,7 @@ DB_SHOW_COMMAND(buffer, db_show_buffer) } db_printf("b_proc = %p,\nb_flags = 0x%b\n", (void *)bp->b_proc, - (u_int)bp->b_flags, - "\20\40bounce\37cluster\36vmio\35ram\34ordered" - "\33paging\32xxx\31writeinprog\30wanted\27relbuf\26avail3" - "\25read\24raw\23phys\22clusterok\21malloc\20nocache" - "\17locked\16inval\15avail2\14error\13eintr\12done\11avail1" - "\10delwri\7call\6cache\5busy\4bad\3async\2needcommit\1age"); + (u_int)bp->b_flags, PRINT_BUF_FLAGS); db_printf("b_error = %d, b_bufsize = %ld, b_bcount = %ld, " "b_resid = %ld\nb_dev = 0x%x, b_data = %p, " "b_blkno = %d, b_pblkno = %d\n", diff --git a/sys/kern/vnode_if.src b/sys/kern/vnode_if.src index 4dd64cd..48c9fef 100644 --- a/sys/kern/vnode_if.src +++ b/sys/kern/vnode_if.src @@ -31,7 +31,7 @@ # SUCH DAMAGE. # # @(#)vnode_if.src 8.12 (Berkeley) 5/14/95 -# $Id: vnode_if.src,v 1.17 1998/05/07 04:58:26 msmith Exp $ +# $Id: vnode_if.src,v 1.18 1998/07/04 20:45:32 julian Exp $ # # @@ -467,6 +467,20 @@ vop_putpages { }; # +#% freeblks vp - - - +# +# This call is used by the filesystem to release blocks back to +# device-driver. This is useful if the driver has a lengthy +# erase handling or similar. +# + +vop_freeblks { + IN struct vnode *vp; + IN daddr_t addr; + IN daddr_t length; +}; + +# # Needs work: no vp? # #vop_bwrite { |
