diff options
| author | mckusick <mckusick@FreeBSD.org> | 2002-03-17 01:25:47 +0000 |
|---|---|---|
| committer | mckusick <mckusick@FreeBSD.org> | 2002-03-17 01:25:47 +0000 |
| commit | 14dd08fd153468502c32dc2d9c1e25a6c2d761d1 (patch) | |
| tree | ee06559e7b5061e6fc6cf074dfca793dd31c681b /sys/nfsserver | |
| parent | 34dcf8975d103d034d7e8b6788c0645cc93af254 (diff) | |
| download | FreeBSD-src-14dd08fd153468502c32dc2d9c1e25a6c2d761d1.zip FreeBSD-src-14dd08fd153468502c32dc2d9c1e25a6c2d761d1.tar.gz | |
Add a flags parameter to VFS_VGET to pass through the desired
locking flags when acquiring a vnode. The immediate purpose is
to allow polling lock requests (LK_NOWAIT) needed by soft updates
to avoid deadlock when enlisting other processes to help with
the background cleanup. For the future it will allow the use of
shared locks for read access to vnodes. This change touches a
lot of files as it affects most filesystems within the system.
It has been well tested on FFS, loopback, and CD-ROM filesystems.
only lightly on the others, so if you find a problem there, please
let me (mckusick@mckusick.com) know.
Diffstat (limited to 'sys/nfsserver')
| -rw-r--r-- | sys/nfsserver/nfs_serv.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/sys/nfsserver/nfs_serv.c b/sys/nfsserver/nfs_serv.c index 17aea87..2d79643 100644 --- a/sys/nfsserver/nfs_serv.c +++ b/sys/nfsserver/nfs_serv.c @@ -3428,7 +3428,8 @@ again: * Probe one of the directory entries to see if the filesystem * supports VGET. */ - if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp) == EOPNOTSUPP) { + if (VFS_VGET(vp->v_mount, dp->d_fileno, LK_EXCLUSIVE, &nvp) == + EOPNOTSUPP) { error = NFSERR_NOTSUPP; vrele(vp); vp = NULL; @@ -3462,7 +3463,8 @@ again: * For readdir_and_lookup get the vnode using * the file number. */ - if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) + if (VFS_VGET(vp->v_mount, dp->d_fileno, LK_EXCLUSIVE, + &nvp)) goto invalid; bzero((caddr_t)nfhp, NFSX_V3FH); nfhp->fh_fsid = |
