diff options
| author | Xin LI <delphij@FreeBSD.org> | 2015-03-21 01:14:11 +0000 |
|---|---|---|
| committer | Xin LI <delphij@FreeBSD.org> | 2015-03-21 01:14:11 +0000 |
| commit | 4f9343fc7c291cb7a1c54d5390a3fd1bb4dec87e (patch) | |
| tree | c19683c85c4bcbdf488e7091448701b408f0b1bb /sys/fs/devfs | |
| parent | 2fa7a2afac169678a029737a07c1a5143dfe1aea (diff) | |
Notes
Diffstat (limited to 'sys/fs/devfs')
| -rw-r--r-- | sys/fs/devfs/devfs_devs.c | 2 | ||||
| -rw-r--r-- | sys/fs/devfs/devfs_vnops.c | 13 |
2 files changed, 12 insertions, 3 deletions
diff --git a/sys/fs/devfs/devfs_devs.c b/sys/fs/devfs/devfs_devs.c index 6620aefc4c452..40023c149cadb 100644 --- a/sys/fs/devfs/devfs_devs.c +++ b/sys/fs/devfs/devfs_devs.c @@ -61,7 +61,7 @@ static MALLOC_DEFINE(M_DEVFS2, "DEVFS2", "DEVFS data 2"); static MALLOC_DEFINE(M_DEVFS3, "DEVFS3", "DEVFS data 3"); static MALLOC_DEFINE(M_CDEVP, "DEVFS1", "DEVFS cdev_priv storage"); -static SYSCTL_NODE(_vfs, OID_AUTO, devfs, CTLFLAG_RW, 0, "DEVFS filesystem"); +SYSCTL_NODE(_vfs, OID_AUTO, devfs, CTLFLAG_RW, 0, "DEVFS filesystem"); static unsigned devfs_generation; SYSCTL_UINT(_vfs_devfs, OID_AUTO, generation, CTLFLAG_RD, diff --git a/sys/fs/devfs/devfs_vnops.c b/sys/fs/devfs/devfs_vnops.c index ef4e3e6f67d10..941f92ca33450 100644 --- a/sys/fs/devfs/devfs_vnops.c +++ b/sys/fs/devfs/devfs_vnops.c @@ -57,6 +57,7 @@ #include <sys/proc.h> #include <sys/stat.h> #include <sys/sx.h> +#include <sys/sysctl.h> #include <sys/time.h> #include <sys/ttycom.h> #include <sys/unistd.h> @@ -79,6 +80,12 @@ SX_SYSINIT(clone_drain_lock, &clone_drain_lock, "clone events drain lock"); struct mtx cdevpriv_mtx; MTX_SYSINIT(cdevpriv_mtx, &cdevpriv_mtx, "cdevpriv lock", MTX_DEF); +SYSCTL_DECL(_vfs_devfs); + +static int devfs_dotimes; +SYSCTL_INT(_vfs_devfs, OID_AUTO, dotimes, CTLFLAG_RW, + &devfs_dotimes, 0, "Update timestamps on DEVFS"); + static int devfs_fp_check(struct file *fp, struct cdev **devp, struct cdevsw **dswp, int *ref) @@ -1221,7 +1228,8 @@ devfs_read_f(struct file *fp, struct uio *uio, struct ucred *cred, foffset_lock_uio(fp, uio, flags | FOF_NOLOCK); error = dsw->d_read(dev, uio, ioflag); - if (uio->uio_resid != resid || (error == 0 && resid != 0)) + if (devfs_dotimes && + (uio->uio_resid != resid || (error == 0 && resid != 0))) vfs_timestamp(&dev->si_atime); td->td_fpop = fpop; dev_relthread(dev, ref); @@ -1700,7 +1708,8 @@ devfs_write_f(struct file *fp, struct uio *uio, struct ucred *cred, resid = uio->uio_resid; error = dsw->d_write(dev, uio, ioflag); - if (uio->uio_resid != resid || (error == 0 && resid != 0)) { + if (devfs_dotimes && + (uio->uio_resid != resid || (error == 0 && resid != 0))) { vfs_timestamp(&dev->si_ctime); dev->si_mtime = dev->si_ctime; } |