Changeset View
Changeset View
Standalone View
Standalone View
head/sys/kern/kern_descrip.c
| Show First 20 Lines • Show All 96 Lines • ▼ Show 20 Lines | static MALLOC_DEFINE(M_FILEDESC_TO_LEADER, "filedesc_to_leader", | ||||
| "file desc to leader structures"); | "file desc to leader structures"); | ||||
| static MALLOC_DEFINE(M_SIGIO, "sigio", "sigio structures"); | static MALLOC_DEFINE(M_SIGIO, "sigio", "sigio structures"); | ||||
| MALLOC_DEFINE(M_FILECAPS, "filecaps", "descriptor capabilities"); | MALLOC_DEFINE(M_FILECAPS, "filecaps", "descriptor capabilities"); | ||||
| MALLOC_DECLARE(M_FADVISE); | MALLOC_DECLARE(M_FADVISE); | ||||
| static __read_mostly uma_zone_t file_zone; | static __read_mostly uma_zone_t file_zone; | ||||
| static __read_mostly uma_zone_t filedesc0_zone; | static __read_mostly uma_zone_t filedesc0_zone; | ||||
| static __read_mostly uma_zone_t pwd_zone; | __read_mostly uma_zone_t pwd_zone; | ||||
| static __read_mostly smr_t pwd_smr; | VFS_SMR_DECLARE; | ||||
| static int closefp(struct filedesc *fdp, int fd, struct file *fp, | static int closefp(struct filedesc *fdp, int fd, struct file *fp, | ||||
| struct thread *td, int holdleaders); | struct thread *td, int holdleaders); | ||||
| static int fd_first_free(struct filedesc *fdp, int low, int size); | static int fd_first_free(struct filedesc *fdp, int low, int size); | ||||
| static void fdgrowtable(struct filedesc *fdp, int nfd); | static void fdgrowtable(struct filedesc *fdp, int nfd); | ||||
| static void fdgrowtable_exp(struct filedesc *fdp, int nfd); | static void fdgrowtable_exp(struct filedesc *fdp, int nfd); | ||||
| static void fdunused(struct filedesc *fdp, int fd); | static void fdunused(struct filedesc *fdp, int fd); | ||||
| static void fdused(struct filedesc *fdp, int fd); | static void fdused(struct filedesc *fdp, int fd); | ||||
| ▲ Show 20 Lines • Show All 3,223 Lines • ▼ Show 20 Lines | |||||
| struct pwd * | struct pwd * | ||||
| pwd_hold(struct thread *td) | pwd_hold(struct thread *td) | ||||
| { | { | ||||
| struct filedesc *fdp; | struct filedesc *fdp; | ||||
| struct pwd *pwd; | struct pwd *pwd; | ||||
| fdp = td->td_proc->p_fd; | fdp = td->td_proc->p_fd; | ||||
| smr_enter(pwd_smr); | vfs_smr_enter(); | ||||
| pwd = smr_entered_load(&fdp->fd_pwd, pwd_smr); | pwd = vfs_smr_entered_load(&fdp->fd_pwd); | ||||
| MPASS(pwd != NULL); | MPASS(pwd != NULL); | ||||
| if (__predict_true(refcount_acquire_if_not_zero(&pwd->pwd_refcount))) { | if (__predict_true(refcount_acquire_if_not_zero(&pwd->pwd_refcount))) { | ||||
| smr_exit(pwd_smr); | vfs_smr_exit(); | ||||
| return (pwd); | return (pwd); | ||||
| } | } | ||||
| smr_exit(pwd_smr); | vfs_smr_exit(); | ||||
| FILEDESC_SLOCK(fdp); | FILEDESC_SLOCK(fdp); | ||||
| pwd = pwd_hold_filedesc(fdp); | pwd = pwd_hold_filedesc(fdp); | ||||
| MPASS(pwd != NULL); | MPASS(pwd != NULL); | ||||
| FILEDESC_SUNLOCK(fdp); | |||||
| return (pwd); | return (pwd); | ||||
| } | } | ||||
| struct pwd * | |||||
| pwd_get_smr(void) | |||||
| { | |||||
| struct pwd *pwd; | |||||
| pwd = vfs_smr_entered_load(&curproc->p_fd->fd_pwd); | |||||
| MPASS(pwd != NULL); | |||||
| return (pwd); | |||||
| } | |||||
| static struct pwd * | static struct pwd * | ||||
| pwd_alloc(void) | pwd_alloc(void) | ||||
| { | { | ||||
| struct pwd *pwd; | struct pwd *pwd; | ||||
| pwd = uma_zalloc_smr(pwd_zone, M_WAITOK); | pwd = uma_zalloc_smr(pwd_zone, M_WAITOK); | ||||
| bzero(pwd, sizeof(*pwd)); | bzero(pwd, sizeof(*pwd)); | ||||
| refcount_init(&pwd->pwd_refcount, 1); | refcount_init(&pwd->pwd_refcount, 1); | ||||
| ▲ Show 20 Lines • Show All 994 Lines • ▼ Show 20 Lines | |||||
| { | { | ||||
| file_zone = uma_zcreate("Files", sizeof(struct file), NULL, NULL, | file_zone = uma_zcreate("Files", sizeof(struct file), NULL, NULL, | ||||
| NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE); | NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE); | ||||
| filedesc0_zone = uma_zcreate("filedesc0", sizeof(struct filedesc0), | filedesc0_zone = uma_zcreate("filedesc0", sizeof(struct filedesc0), | ||||
| NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); | NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); | ||||
| pwd_zone = uma_zcreate("PWD", sizeof(struct pwd), NULL, NULL, | pwd_zone = uma_zcreate("PWD", sizeof(struct pwd), NULL, NULL, | ||||
| NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_SMR); | NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_SMR); | ||||
| pwd_smr = uma_zone_get_smr(pwd_zone); | /* | ||||
| * XXXMJG this is a temporary hack due to boot ordering issues against | |||||
| * the vnode zone. | |||||
| */ | |||||
| vfs_smr = uma_zone_get_smr(pwd_zone); | |||||
| mtx_init(&sigio_lock, "sigio lock", NULL, MTX_DEF); | mtx_init(&sigio_lock, "sigio lock", NULL, MTX_DEF); | ||||
| } | } | ||||
| SYSINIT(select, SI_SUB_LOCK, SI_ORDER_FIRST, filelistinit, NULL); | SYSINIT(select, SI_SUB_LOCK, SI_ORDER_FIRST, filelistinit, NULL); | ||||
| /*-------------------------------------------------------------------*/ | /*-------------------------------------------------------------------*/ | ||||
| static int | static int | ||||
| badfo_readwrite(struct file *fp, struct uio *uio, struct ucred *active_cred, | badfo_readwrite(struct file *fp, struct uio *uio, struct ucred *active_cred, | ||||
| ▲ Show 20 Lines • Show All 216 Lines • Show Last 20 Lines | |||||