Author: rmacklem Date: Sat May 12 22:20:55 2012 New Revision: 235381 URL: http://svn.freebsd.org/changeset/base/235381
Log: Fix two cases in the new NFS server where a tsleep() is used, when the code should actually protect the tested variable with a mutex. Since the tsleep()s had a 10sec timeout, the race would have only delayed the allocation of a new clientid for a client. The sleeps will also rarely occur, since having a callback in progress when a client acquires a new clientid, is unlikely. in practice, since having a callback in progress when a fresh clientid is being acquired by a client is unlikely. MFC after: 1 month Modified: head/sys/fs/nfsserver/nfs_nfsdstate.c Modified: head/sys/fs/nfsserver/nfs_nfsdstate.c ============================================================================== --- head/sys/fs/nfsserver/nfs_nfsdstate.c Sat May 12 21:25:48 2012 (r235380) +++ head/sys/fs/nfsserver/nfs_nfsdstate.c Sat May 12 22:20:55 2012 (r235381) @@ -331,11 +331,13 @@ nfsrv_setclient(struct nfsrv_descript *n * Must wait until any outstanding callback on the old clp * completes. */ + NFSLOCKSTATE(); while (clp->lc_cbref) { clp->lc_flags |= LCL_WAKEUPWANTED; - (void) tsleep((caddr_t)clp, PZERO - 1, + (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1, "nfsd clp", 10 * hz); } + NFSUNLOCKSTATE(); nfsrv_zapclient(clp, p); *new_clpp = NULL; goto out; @@ -385,10 +387,13 @@ nfsrv_setclient(struct nfsrv_descript *n * Must wait until any outstanding callback on the old clp * completes. */ + NFSLOCKSTATE(); while (clp->lc_cbref) { clp->lc_flags |= LCL_WAKEUPWANTED; - (void) tsleep((caddr_t)clp, PZERO - 1, "nfsd clp", 10 * hz); + (void)mtx_sleep(clp, NFSSTATEMUTEXPTR, PZERO - 1, "nfsd clp", + 10 * hz); } + NFSUNLOCKSTATE(); nfsrv_zapclient(clp, p); *new_clpp = NULL; @@ -3816,11 +3821,9 @@ nfsrv_docallback(struct nfsclient *clp, clp->lc_cbref--; if ((clp->lc_flags & LCL_WAKEUPWANTED) && clp->lc_cbref == 0) { clp->lc_flags &= ~LCL_WAKEUPWANTED; - NFSUNLOCKSTATE(); - wakeup((caddr_t)clp); - } else { - NFSUNLOCKSTATE(); + wakeup(clp); } + NFSUNLOCKSTATE(); NFSEXITCODE(error); return (error); _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"