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author | phk <phk@FreeBSD.org> | 1997-08-26 07:32:51 +0000 |
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committer | phk <phk@FreeBSD.org> | 1997-08-26 07:32:51 +0000 |
commit | fddfc9d5bb4c35d88417fa80a062219876186593 (patch) | |
tree | 7f29931e5661e3731f6b972dc3a9508534617833 /sys/gnu/fs | |
parent | f320b3a30651cae7b34067561adb48f2b6f57621 (diff) | |
download | FreeBSD-src-fddfc9d5bb4c35d88417fa80a062219876186593.zip FreeBSD-src-fddfc9d5bb4c35d88417fa80a062219876186593.tar.gz |
Uncut&paste cache_lookup().
This unifies several times in theory indentical 50 lines of code.
The filesystems have a new method: vop_cachedlookup, which is the
meat of the lookup, and use vfs_cache_lookup() for their vop_lookup
method. vfs_cache_lookup() will check the namecache and pass on
to the vop_cachedlookup method in case of a miss.
It's still the task of the individual filesystems to populate the
namecache with cache_enter().
Filesystems that do not use the namecache will just provide the
vop_lookup method as usual.
Diffstat (limited to 'sys/gnu/fs')
-rw-r--r-- | sys/gnu/fs/ext2fs/ext2_extern.h | 2 | ||||
-rw-r--r-- | sys/gnu/fs/ext2fs/ext2_lookup.c | 50 | ||||
-rw-r--r-- | sys/gnu/fs/ext2fs/ext2_vnops.c | 3 |
3 files changed, 4 insertions, 51 deletions
diff --git a/sys/gnu/fs/ext2fs/ext2_extern.h b/sys/gnu/fs/ext2fs/ext2_extern.h index f00cd1e..277106b 100644 --- a/sys/gnu/fs/ext2fs/ext2_extern.h +++ b/sys/gnu/fs/ext2fs/ext2_extern.h @@ -78,7 +78,7 @@ int ext2_truncate __P((struct vop_truncate_args *)); int ext2_update __P((struct vop_update_args *)); int ext2_valloc __P((struct vop_valloc_args *)); int ext2_vfree __P((struct vop_vfree_args *)); -int ext2_lookup __P((struct vop_lookup_args *)); +int ext2_lookup __P((struct vop_cachedlookup_args *)); int ext2_readdir __P((struct vop_readdir_args *)); void ext2_print_dinode __P((struct dinode *)); void ext2_print_inode __P((struct inode *)); diff --git a/sys/gnu/fs/ext2fs/ext2_lookup.c b/sys/gnu/fs/ext2fs/ext2_lookup.c index 6d769f9..431a52b 100644 --- a/sys/gnu/fs/ext2fs/ext2_lookup.c +++ b/sys/gnu/fs/ext2fs/ext2_lookup.c @@ -268,7 +268,7 @@ printf("ext2_readdir called uio->uio_offset %d uio->uio_resid %d count %d \n", */ int ext2_lookup(ap) - struct vop_lookup_args /* { + struct vop_cachedlookup_args /* { struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; @@ -321,55 +321,7 @@ ext2_lookup(ap) /* * We now have a segment name to search for, and a directory to search. - * - * Before tediously performing a linear scan of the directory, - * check the name cache to see if the directory/name pair - * we are looking for is known already. */ - if (error = cache_lookup(vdp, vpp, cnp)) { - int vpid; /* capability number of vnode */ - - if (error == ENOENT) - return (error); - /* - * Get the next vnode in the path. - * See comment below starting `Step through' for - * an explaination of the locking protocol. - */ - pdp = vdp; - dp = VTOI(*vpp); - vdp = *vpp; - vpid = vdp->v_id; - if (pdp == vdp) { /* lookup on "." */ - VREF(vdp); - error = 0; - } else if (flags & ISDOTDOT) { - VOP_UNLOCK(pdp, 0, p); - error = vget(vdp, LK_EXCLUSIVE, p); - if (!error && lockparent && (flags & ISLASTCN)) - error = vn_lock(pdp, LK_EXCLUSIVE, p); - } else { - error = vget(vdp, LK_EXCLUSIVE, p); - if (!lockparent || error || !(flags & ISLASTCN)) - VOP_UNLOCK(pdp, 0, p); - } - /* - * Check that the capability number did not change - * while we were waiting for the lock. - */ - if (!error) { - if (vpid == vdp->v_id) - return (0); - vput(vdp); - if (lockparent && pdp != vdp && (flags & ISLASTCN)) - VOP_UNLOCK(pdp, 0, p); - } - if (error = vn_lock(pdp, LK_EXCLUSIVE, p)) - return (error); - vdp = pdp; - dp = VTOI(pdp); - *vpp = NULL; - } /* * Suppress search for slots unless creating diff --git a/sys/gnu/fs/ext2fs/ext2_vnops.c b/sys/gnu/fs/ext2fs/ext2_vnops.c index 1465efd..a5b6c56 100644 --- a/sys/gnu/fs/ext2fs/ext2_vnops.c +++ b/sys/gnu/fs/ext2fs/ext2_vnops.c @@ -84,7 +84,8 @@ static int ext2_write __P((struct vop_write_args *)); vop_t **ext2_vnodeop_p; static struct vnodeopv_entry_desc ext2_vnodeop_entries[] = { { &vop_default_desc, (vop_t *)vn_default_error }, - { &vop_lookup_desc, (vop_t *)ext2_lookup }, /* lookup */ + { &vop_lookup_desc, (vop_t *)vfs_cache_lookup }, /* lookup */ + { &vop_cachedlookup_desc, (vop_t *)ext2_lookup }, /* lookup */ { &vop_create_desc, (vop_t *)ufs_create }, /* create */ { &vop_mknod_desc, (vop_t *)ufs_mknod }, /* mknod */ { &vop_open_desc, (vop_t *)ufs_open }, /* open */ |