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Bring back the code to prime the ACCESS cache when fetching attributes for

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an NFS file.  Now the priming is conditional on  a new
vfs.nfs.prime_access_cache sysctl.  For now I've left the default setting
to disabling the priming.

Requested by:	 scottl
This commit is contained in:
John Baldwin 2009-02-24 16:01:56 +00:00
parent 92a0357875
commit fdd1a964d1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=188994
1 changed files with 11 additions and 0 deletions
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11
sys/nfsclient/nfs_vnops.c
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@ -208,6 +208,11 @@ static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO;
SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
&nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
static int nfs_prime_access_cache = 0;
SYSCTL_INT(_vfs_nfs, OID_AUTO, prime_access_cache, CTLFLAG_RW,
&nfs_prime_access_cache, 0,
"Prime NFS ACCESS cache when fetching attributes");
static int nfsv3_commit_on_close = 0;
SYSCTL_INT(_vfs_nfs, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW,
&nfsv3_commit_on_close, 0, "write+commit on close, else only write");
@ -644,6 +649,12 @@ nfs_getattr(struct vop_getattr_args *ap)
*/
if (nfs_getattrcache(vp, &vattr) == 0)
goto nfsmout;
if (v3 && nfs_prime_access_cache && nfsaccess_cache_timeout > 0) {
nfsstats.accesscache_misses++;
nfs3_access_otw(vp, NFSV3ACCESS_ALL, td, ap->a_cred);
if (nfs_getattrcache(vp, &vattr) == 0)
goto nfsmout;
}
nfsstats.rpccnt[NFSPROC_GETATTR]++;
mreq = nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3));
mb = mreq;