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Use buffer pager for cd9660.

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Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
This commit is contained in:
Konstantin Belousov 2016-10-28 11:46:39 +00:00
parent 06965e96b3
commit c329ee711b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=308028
1 changed files with 42 additions and 0 deletions
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42
sys/fs/cd9660/cd9660_vnops.c
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@ -51,6 +51,7 @@ __FBSDID("$FreeBSD$");
#include <sys/dirent.h>
#include <sys/unistd.h>
#include <sys/filio.h>
#include <sys/sysctl.h>
#include <vm/vm.h>
#include <vm/vnode_pager.h>
@ -74,6 +75,7 @@ static vop_readdir_t cd9660_readdir;
static vop_readlink_t cd9660_readlink;
static vop_strategy_t cd9660_strategy;
static vop_vptofh_t cd9660_vptofh;
static vop_getpages_t cd9660_getpages;
/*
* Setattr call. Only allowed for block and character special devices.
@ -836,6 +838,45 @@ cd9660_vptofh(ap)
return (0);
}
SYSCTL_NODE(_vfs, OID_AUTO, cd9660, CTLFLAG_RW, 0, "cd9660 filesystem");
static int use_buf_pager = 1;
SYSCTL_INT(_vfs_cd9660, OID_AUTO, use_buf_pager, CTLFLAG_RWTUN,
&use_buf_pager, 0,
"Use buffer pager instead of bmap");
static daddr_t
cd9660_gbp_getblkno(struct vnode *vp, vm_ooffset_t off)
{
return (lblkno(VTOI(vp)->i_mnt, off));
}
static int
cd9660_gbp_getblksz(struct vnode *vp, daddr_t lbn)
{
struct iso_node *ip;
ip = VTOI(vp);
return (blksize(ip->i_mnt, ip, lbn));
}
static int
cd9660_getpages(struct vop_getpages_args *ap)
{
struct vnode *vp;
vp = ap->a_vp;
if (vp->v_type == VCHR || vp->v_type == VBLK)
return (EOPNOTSUPP);
if (use_buf_pager)
return (vfs_bio_getpages(vp, ap->a_m, ap->a_count,
ap->a_rbehind, ap->a_rahead, cd9660_gbp_getblkno,
cd9660_gbp_getblksz));
return (vnode_pager_generic_getpages(vp, ap->a_m, ap->a_count,
ap->a_rbehind, ap->a_rahead, NULL, NULL));
}
/*
* Global vfs data structures for cd9660
*/
@ -857,6 +898,7 @@ struct vop_vector cd9660_vnodeops = {
.vop_setattr = cd9660_setattr,
.vop_strategy = cd9660_strategy,
.vop_vptofh = cd9660_vptofh,
.vop_getpages = cd9660_getpages,
};
/*