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Differential D36268 Diff 109596 sys/fs/devfs/devfs_vnops.c

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sys/fs/devfs/devfs_vnops.c

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#include <vm/vm.h> #include <vm/vm.h>
#include <vm/vm_extern.h> #include <vm/vm_extern.h>
#include <vm/vm_object.h> #include <vm/vm_object.h>
static MALLOC_DEFINE(M_CDEVPDATA, "DEVFSP", "Metainfo for cdev-fp data"); static MALLOC_DEFINE(M_CDEVPDATA, "DEVFSP", "Metainfo for cdev-fp data");
struct mtx devfs_de_interlock; struct mtx devfs_de_interlock;
MTX_SYSINIT(devfs_de_interlock, &devfs_de_interlock, "devfs interlock", MTX_DEF); MTX_SYSINIT(devfs_de_interlock, &devfs_de_interlock, "devfs interlock", MTX_DEF);
struct sx clone_drain_lock;
SX_SYSINIT(clone_drain_lock, &clone_drain_lock, "clone events drain lock");
struct mtx cdevpriv_mtx; struct mtx cdevpriv_mtx;
MTX_SYSINIT(cdevpriv_mtx, &cdevpriv_mtx, "cdevpriv lock", MTX_DEF); MTX_SYSINIT(cdevpriv_mtx, &cdevpriv_mtx, "cdevpriv lock", MTX_DEF);
SYSCTL_DECL(_vfs_devfs); SYSCTL_DECL(_vfs_devfs);
static int devfs_dotimes; static int devfs_dotimes;
SYSCTL_INT(_vfs_devfs, OID_AUTO, dotimes, CTLFLAG_RW, SYSCTL_INT(_vfs_devfs, OID_AUTO, dotimes, CTLFLAG_RW,
&devfs_dotimes, 0, "Update timestamps on DEVFS with default precision"); &devfs_dotimes, 0, "Update timestamps on DEVFS with default precision");
▲ Show 20 Lines • Show All 999 Lines • ▼ Show 20 Lines while (de == NULL) { /* While(...) so we can use break */
*/ */
pname = devfs_fqpn(specname, dmp, dd, cnp); pname = devfs_fqpn(specname, dmp, dd, cnp);
if (pname == NULL) if (pname == NULL)
break; break;
cdev = NULL; cdev = NULL;
DEVFS_DMP_HOLD(dmp); DEVFS_DMP_HOLD(dmp);
sx_xunlock(&dmp->dm_lock); sx_xunlock(&dmp->dm_lock);
sx_slock(&clone_drain_lock);
EVENTHANDLER_INVOKE(dev_clone, EVENTHANDLER_INVOKE(dev_clone,
td->td_ucred, pname, strlen(pname), &cdev); td->td_ucred, pname, strlen(pname), &cdev);
sx_sunlock(&clone_drain_lock);
if (cdev == NULL) if (cdev == NULL)
sx_xlock(&dmp->dm_lock); sx_xlock(&dmp->dm_lock);
else if (devfs_populate_vp(dvp) != 0) { else if (devfs_populate_vp(dvp) != 0) {
*dm_unlock = 0; *dm_unlock = 0;
sx_xlock(&dmp->dm_lock); sx_xlock(&dmp->dm_lock);
if (DEVFS_DMP_DROP(dmp)) { if (DEVFS_DMP_DROP(dmp)) {
sx_xunlock(&dmp->dm_lock); sx_xunlock(&dmp->dm_lock);
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