diff options
| author | Jeff Layton <jlayton@primarydata.com> | 2014-09-12 22:40:21 +0200 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2014-09-17 22:33:17 +0200 |
| commit | 788a7914ad43380d31efed1c4d14b5f2c466a764 (patch) | |
| tree | fe27e8595c23a8966d3814ebc76dfb9aea17f3e9 /fs/nfsd | |
| parent | nfsd: serialize nfsdcltrack upcalls for a particular client (diff) | |
| download | linux-788a7914ad43380d31efed1c4d14b5f2c466a764.tar.xz linux-788a7914ad43380d31efed1c4d14b5f2c466a764.zip | |
nfsd: set and test NFSD4_CLIENT_STABLE bit to reduce nfsdcltrack upcalls
The nfsdcltrack upcall doesn't utilize the NFSD4_CLIENT_STABLE flag,
which basically results in an upcall every time we call into the client
tracking ops.
Change it to set this bit on a successful "check" or "create" request,
and clear it on a "remove" request. Also, check to see if that bit is
set before upcalling on a "check" or "remove" request, and skip
upcalling appropriately, depending on its state.
Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Diffstat (limited to 'fs/nfsd')
| -rw-r--r-- | fs/nfsd/nfs4recover.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c index bf3a3575d060..d0fc003d130a 100644 --- a/fs/nfsd/nfs4recover.c +++ b/fs/nfsd/nfs4recover.c @@ -1296,7 +1296,8 @@ nfsd4_umh_cltrack_create(struct nfs4_client *clp) grace_start = nfsd4_cltrack_grace_start(nn->boot_time); nfsd4_cltrack_upcall_lock(clp); - nfsd4_umh_cltrack_upcall("create", hexid, has_session, grace_start); + if (!nfsd4_umh_cltrack_upcall("create", hexid, has_session, grace_start)) + set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); nfsd4_cltrack_upcall_unlock(clp); kfree(has_session); @@ -1309,6 +1310,9 @@ nfsd4_umh_cltrack_remove(struct nfs4_client *clp) { char *hexid; + if (!test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) + return; + hexid = bin_to_hex_dup(clp->cl_name.data, clp->cl_name.len); if (!hexid) { dprintk("%s: can't allocate memory for upcall!\n", __func__); @@ -1316,7 +1320,9 @@ nfsd4_umh_cltrack_remove(struct nfs4_client *clp) } nfsd4_cltrack_upcall_lock(clp); - nfsd4_umh_cltrack_upcall("remove", hexid, NULL, NULL); + if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags) && + nfsd4_umh_cltrack_upcall("remove", hexid, NULL, NULL) == 0) + clear_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); nfsd4_cltrack_upcall_unlock(clp); kfree(hexid); @@ -1328,6 +1334,9 @@ nfsd4_umh_cltrack_check(struct nfs4_client *clp) int ret; char *hexid, *has_session, *legacy; + if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) + return 0; + hexid = bin_to_hex_dup(clp->cl_name.data, clp->cl_name.len); if (!hexid) { dprintk("%s: can't allocate memory for upcall!\n", __func__); @@ -1338,9 +1347,14 @@ nfsd4_umh_cltrack_check(struct nfs4_client *clp) legacy = nfsd4_cltrack_legacy_recdir(&clp->cl_name); nfsd4_cltrack_upcall_lock(clp); - ret = nfsd4_umh_cltrack_upcall("check", hexid, has_session, legacy); + if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) { + ret = 0; + } else { + ret = nfsd4_umh_cltrack_upcall("check", hexid, has_session, legacy); + if (ret == 0) + set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); + } nfsd4_cltrack_upcall_unlock(clp); - kfree(has_session); kfree(legacy); kfree(hexid); |