version 1.34, 1994/12/27 19:11:17 |
version 1.62, 1998/08/13 10:06:33 |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
* SUCH DAMAGE. |
* SUCH DAMAGE. |
* |
* |
* @(#)kernfs_vnops.c 8.9 (Berkeley) 6/15/94 |
* @(#)kernfs_vnops.c 8.15 (Berkeley) 5/21/95 |
*/ |
*/ |
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/* |
/* |
* Kernel parameter filesystem (/kern) |
* Kernel parameter filesystem (/kern) |
*/ |
*/ |
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#if defined(_KERNEL) && !defined(_LKM) |
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#include "opt_uvm.h" |
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#endif |
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#include <sys/param.h> |
#include <sys/param.h> |
#include <sys/systm.h> |
#include <sys/systm.h> |
#include <sys/kernel.h> |
#include <sys/kernel.h> |
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#include <sys/buf.h> |
#include <sys/buf.h> |
#include <sys/dirent.h> |
#include <sys/dirent.h> |
#include <sys/msgbuf.h> |
#include <sys/msgbuf.h> |
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#include <miscfs/genfs/genfs.h> |
#include <miscfs/kernfs/kernfs.h> |
#include <miscfs/kernfs/kernfs.h> |
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#if defined(UVM) |
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#include <vm/vm.h> |
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#include <uvm/uvm_extern.h> |
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#endif |
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#define KSTRING 256 /* Largest I/O available via this filesystem */ |
#define KSTRING 256 /* Largest I/O available via this filesystem */ |
#define UIO_MX 32 |
#define UIO_MX 32 |
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#define WRITE_MODE (S_IWUSR|S_IRUSR|S_IRGRP|S_IROTH) |
#define WRITE_MODE (S_IWUSR|S_IRUSR|S_IRGRP|S_IROTH) |
#define DIR_MODE (S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) |
#define DIR_MODE (S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) |
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struct kern_target { |
struct kern_target kern_targets[] = { |
u_char kt_type; |
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u_char kt_namlen; |
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char *kt_name; |
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void *kt_data; |
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#define KTT_NULL 1 |
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#define KTT_TIME 5 |
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#define KTT_INT 17 |
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#define KTT_STRING 31 |
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#define KTT_HOSTNAME 47 |
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#define KTT_AVENRUN 53 |
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#define KTT_DEVICE 71 |
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#define KTT_MSGBUF 89 |
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u_char kt_tag; |
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u_char kt_vtype; |
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mode_t kt_mode; |
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} kern_targets[] = { |
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/* NOTE: The name must be less than UIO_MX-16 chars in length */ |
/* NOTE: The name must be less than UIO_MX-16 chars in length */ |
#define N(s) sizeof(s)-1, s |
#define N(s) sizeof(s)-1, s |
/* name data tag type ro/rw */ |
/* name data tag type ro/rw */ |
Line 95 struct kern_target { |
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Line 90 struct kern_target { |
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{ DT_REG, N("hz"), &hz, KTT_INT, VREG, READ_MODE }, |
{ DT_REG, N("hz"), &hz, KTT_INT, VREG, READ_MODE }, |
{ DT_REG, N("loadavg"), 0, KTT_AVENRUN, VREG, READ_MODE }, |
{ DT_REG, N("loadavg"), 0, KTT_AVENRUN, VREG, READ_MODE }, |
{ DT_REG, N("msgbuf"), 0, KTT_MSGBUF, VREG, READ_MODE }, |
{ DT_REG, N("msgbuf"), 0, KTT_MSGBUF, VREG, READ_MODE }, |
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#if defined(UVM) |
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{ DT_REG, N("pagesize"), &uvmexp.pagesize, KTT_INT, VREG, READ_MODE }, |
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#else |
{ DT_REG, N("pagesize"), &cnt.v_page_size, KTT_INT, VREG, READ_MODE }, |
{ DT_REG, N("pagesize"), &cnt.v_page_size, KTT_INT, VREG, READ_MODE }, |
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#endif |
{ DT_REG, N("physmem"), &physmem, KTT_INT, VREG, READ_MODE }, |
{ DT_REG, N("physmem"), &physmem, KTT_INT, VREG, READ_MODE }, |
#if 0 |
#if 0 |
{ DT_DIR, N("root"), 0, KTT_NULL, VDIR, DIR_MODE }, |
{ DT_DIR, N("root"), 0, KTT_NULL, VDIR, DIR_MODE }, |
Line 108 struct kern_target { |
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Line 107 struct kern_target { |
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}; |
}; |
static int nkern_targets = sizeof(kern_targets) / sizeof(kern_targets[0]); |
static int nkern_targets = sizeof(kern_targets) / sizeof(kern_targets[0]); |
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int kernfs_lookup __P((void *)); |
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#define kernfs_create genfs_eopnotsupp |
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#define kernfs_mknod genfs_eopnotsupp |
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#define kernfs_open genfs_nullop |
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#define kernfs_close genfs_nullop |
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int kernfs_access __P((void *)); |
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int kernfs_getattr __P((void *)); |
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int kernfs_setattr __P((void *)); |
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int kernfs_read __P((void *)); |
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int kernfs_write __P((void *)); |
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#define kernfs_ioctl genfs_enoioctl |
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#define kernfs_poll genfs_poll |
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#define kernfs_revoke genfs_revoke |
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#define kernfs_mmap genfs_eopnotsupp |
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#define kernfs_fsync genfs_nullop |
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#define kernfs_seek genfs_nullop |
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#define kernfs_remove genfs_eopnotsupp |
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int kernfs_link __P((void *)); |
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#define kernfs_rename genfs_eopnotsupp |
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#define kernfs_mkdir genfs_eopnotsupp |
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#define kernfs_rmdir genfs_eopnotsupp |
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int kernfs_symlink __P((void *)); |
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int kernfs_readdir __P((void *)); |
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#define kernfs_readlink genfs_eopnotsupp |
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#define kernfs_abortop genfs_abortop |
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int kernfs_inactive __P((void *)); |
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int kernfs_reclaim __P((void *)); |
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#define kernfs_lock genfs_nolock |
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#define kernfs_unlock genfs_nounlock |
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#define kernfs_bmap genfs_badop |
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#define kernfs_strategy genfs_badop |
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int kernfs_print __P((void *)); |
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#define kernfs_islocked genfs_noislocked |
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int kernfs_pathconf __P((void *)); |
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#define kernfs_advlock genfs_einval |
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#define kernfs_blkatoff genfs_eopnotsupp |
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#define kernfs_valloc genfs_eopnotsupp |
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#define kernfs_vfree genfs_nullop |
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#define kernfs_truncate genfs_eopnotsupp |
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#define kernfs_update genfs_nullop |
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#define kernfs_bwrite genfs_eopnotsupp |
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int kernfs_xread __P((struct kern_target *, int, char **, int)); |
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int kernfs_xwrite __P((struct kern_target *, char *, int)); |
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int (**kernfs_vnodeop_p) __P((void *)); |
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struct vnodeopv_entry_desc kernfs_vnodeop_entries[] = { |
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{ &vop_default_desc, vn_default_error }, |
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{ &vop_lookup_desc, kernfs_lookup }, /* lookup */ |
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{ &vop_create_desc, kernfs_create }, /* create */ |
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{ &vop_mknod_desc, kernfs_mknod }, /* mknod */ |
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{ &vop_open_desc, kernfs_open }, /* open */ |
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{ &vop_close_desc, kernfs_close }, /* close */ |
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{ &vop_access_desc, kernfs_access }, /* access */ |
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{ &vop_getattr_desc, kernfs_getattr }, /* getattr */ |
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{ &vop_setattr_desc, kernfs_setattr }, /* setattr */ |
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{ &vop_read_desc, kernfs_read }, /* read */ |
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{ &vop_write_desc, kernfs_write }, /* write */ |
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{ &vop_ioctl_desc, kernfs_ioctl }, /* ioctl */ |
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{ &vop_poll_desc, kernfs_poll }, /* poll */ |
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{ &vop_revoke_desc, kernfs_revoke }, /* revoke */ |
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{ &vop_mmap_desc, kernfs_mmap }, /* mmap */ |
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{ &vop_fsync_desc, kernfs_fsync }, /* fsync */ |
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{ &vop_seek_desc, kernfs_seek }, /* seek */ |
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{ &vop_remove_desc, kernfs_remove }, /* remove */ |
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{ &vop_link_desc, kernfs_link }, /* link */ |
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{ &vop_rename_desc, kernfs_rename }, /* rename */ |
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{ &vop_mkdir_desc, kernfs_mkdir }, /* mkdir */ |
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{ &vop_rmdir_desc, kernfs_rmdir }, /* rmdir */ |
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{ &vop_symlink_desc, kernfs_symlink }, /* symlink */ |
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{ &vop_readdir_desc, kernfs_readdir }, /* readdir */ |
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{ &vop_readlink_desc, kernfs_readlink }, /* readlink */ |
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{ &vop_abortop_desc, kernfs_abortop }, /* abortop */ |
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{ &vop_inactive_desc, kernfs_inactive }, /* inactive */ |
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{ &vop_reclaim_desc, kernfs_reclaim }, /* reclaim */ |
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{ &vop_lock_desc, kernfs_lock }, /* lock */ |
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{ &vop_unlock_desc, kernfs_unlock }, /* unlock */ |
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{ &vop_bmap_desc, kernfs_bmap }, /* bmap */ |
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{ &vop_strategy_desc, kernfs_strategy }, /* strategy */ |
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{ &vop_print_desc, kernfs_print }, /* print */ |
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{ &vop_islocked_desc, kernfs_islocked }, /* islocked */ |
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{ &vop_pathconf_desc, kernfs_pathconf }, /* pathconf */ |
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{ &vop_advlock_desc, kernfs_advlock }, /* advlock */ |
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{ &vop_blkatoff_desc, kernfs_blkatoff }, /* blkatoff */ |
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{ &vop_valloc_desc, kernfs_valloc }, /* valloc */ |
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{ &vop_vfree_desc, kernfs_vfree }, /* vfree */ |
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{ &vop_truncate_desc, kernfs_truncate }, /* truncate */ |
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{ &vop_update_desc, kernfs_update }, /* update */ |
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{ &vop_bwrite_desc, kernfs_bwrite }, /* bwrite */ |
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{ (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL } |
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}; |
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struct vnodeopv_desc kernfs_vnodeop_opv_desc = |
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{ &kernfs_vnodeop_p, kernfs_vnodeop_entries }; |
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int |
int |
kernfs_xread(kt, off, bufp, len) |
kernfs_xread(kt, off, bufp, len) |
struct kern_target *kt; |
struct kern_target *kt; |
Line 121 kernfs_xread(kt, off, bufp, len) |
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Line 214 kernfs_xread(kt, off, bufp, len) |
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struct timeval tv; |
struct timeval tv; |
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microtime(&tv); |
microtime(&tv); |
sprintf(*bufp, "%d %d\n", tv.tv_sec, tv.tv_usec); |
sprintf(*bufp, "%ld %ld\n", tv.tv_sec, tv.tv_usec); |
break; |
break; |
} |
} |
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Line 140 kernfs_xread(kt, off, bufp, len) |
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Line 233 kernfs_xread(kt, off, bufp, len) |
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} |
} |
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case KTT_MSGBUF: { |
case KTT_MSGBUF: { |
extern struct msgbuf *msgbufp; |
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long n; |
long n; |
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if (off >= MSG_BSIZE) |
/* |
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* deal with cases where the message buffer has |
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* become corrupted. |
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*/ |
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if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { |
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msgbufenabled = 0; |
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return (ENXIO); |
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} |
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/* |
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* Note that reads of /kern/msgbuf won't necessarily yield |
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* consistent results, if the message buffer is modified |
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* while the read is in progress. The worst that can happen |
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* is that incorrect data will be read. There's no way |
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* that this can crash the system unless the values in the |
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* message buffer header are corrupted, but that'll cause |
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* the system to die anyway. |
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*/ |
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if (off >= msgbufp->msg_bufs) |
return (0); |
return (0); |
n = msgbufp->msg_bufx + off; |
n = msgbufp->msg_bufx + off; |
if (n >= MSG_BSIZE) |
if (n >= msgbufp->msg_bufs) |
n -= MSG_BSIZE; |
n -= msgbufp->msg_bufs; |
len = min(MSG_BSIZE - n, MSG_BSIZE - off); |
len = min(msgbufp->msg_bufs - n, msgbufp->msg_bufs - off); |
*bufp = msgbufp->msg_bufc + n; |
*bufp = msgbufp->msg_bufc + n; |
return (len); |
return (len); |
} |
} |
Line 160 kernfs_xread(kt, off, bufp, len) |
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Line 270 kernfs_xread(kt, off, bufp, len) |
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if (xlen >= (len-2)) |
if (xlen >= (len-2)) |
return (EINVAL); |
return (EINVAL); |
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bcopy(cp, *bufp, xlen); |
memcpy(*bufp, cp, xlen); |
(*bufp)[xlen] = '\n'; |
(*bufp)[xlen] = '\n'; |
(*bufp)[xlen+1] = '\0'; |
(*bufp)[xlen+1] = '\0'; |
break; |
break; |
Line 168 kernfs_xread(kt, off, bufp, len) |
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Line 278 kernfs_xread(kt, off, bufp, len) |
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case KTT_AVENRUN: |
case KTT_AVENRUN: |
averunnable.fscale = FSCALE; |
averunnable.fscale = FSCALE; |
sprintf(*bufp, "%ld %ld %ld %ld\n", |
sprintf(*bufp, "%d %d %d %ld\n", |
averunnable.ldavg[0], averunnable.ldavg[1], |
averunnable.ldavg[0], averunnable.ldavg[1], |
averunnable.ldavg[2], averunnable.fscale); |
averunnable.ldavg[2], averunnable.fscale); |
break; |
break; |
Line 195 kernfs_xwrite(kt, buf, len) |
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Line 305 kernfs_xwrite(kt, buf, len) |
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case KTT_HOSTNAME: |
case KTT_HOSTNAME: |
if (buf[len-1] == '\n') |
if (buf[len-1] == '\n') |
--len; |
--len; |
bcopy(buf, hostname, len); |
memcpy(hostname, buf, len); |
hostname[len] = '\0'; |
hostname[len] = '\0'; |
hostnamelen = len; |
hostnamelen = len; |
return (0); |
return (0); |
Line 210 kernfs_xwrite(kt, buf, len) |
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Line 320 kernfs_xwrite(kt, buf, len) |
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* vp is the current namei directory |
* vp is the current namei directory |
* ndp is the name to locate in that directory... |
* ndp is the name to locate in that directory... |
*/ |
*/ |
kernfs_lookup(ap) |
int |
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kernfs_lookup(v) |
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void *v; |
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{ |
struct vop_lookup_args /* { |
struct vop_lookup_args /* { |
struct vnode * a_dvp; |
struct vnode * a_dvp; |
struct vnode ** a_vpp; |
struct vnode ** a_vpp; |
struct componentname * a_cnp; |
struct componentname * a_cnp; |
} */ *ap; |
} */ *ap = v; |
{ |
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struct componentname *cnp = ap->a_cnp; |
struct componentname *cnp = ap->a_cnp; |
struct vnode **vpp = ap->a_vpp; |
struct vnode **vpp = ap->a_vpp; |
struct vnode *dvp = ap->a_dvp; |
struct vnode *dvp = ap->a_dvp; |
char *pname = cnp->cn_nameptr; |
const char *pname = cnp->cn_nameptr; |
struct kern_target *kt; |
struct kern_target *kt; |
struct vnode *fvp; |
struct vnode *fvp; |
int error, i; |
int error, i; |
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#ifdef KERNFS_DIAGNOSTIC |
#ifdef KERNFS_DIAGNOSTIC |
printf("kernfs_lookup(%x)\n", ap); |
printf("kernfs_lookup(%p)\n", ap); |
printf("kernfs_lookup(dp = %x, vpp = %x, cnp = %x)\n", dvp, vpp, ap->a_cnp); |
printf("kernfs_lookup(dp = %p, vpp = %p, cnp = %p)\n", dvp, vpp, ap->a_cnp); |
printf("kernfs_lookup(%s)\n", pname); |
printf("kernfs_lookup(%s)\n", pname); |
#endif |
#endif |
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*vpp = NULLVP; |
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if (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME) |
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return (EROFS); |
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VOP_UNLOCK(dvp, 0); |
if (cnp->cn_namelen == 1 && *pname == '.') { |
if (cnp->cn_namelen == 1 && *pname == '.') { |
*vpp = dvp; |
*vpp = dvp; |
VREF(dvp); |
VREF(dvp); |
/*VOP_LOCK(dvp);*/ |
vn_lock(dvp, LK_SHARED | LK_RETRY); |
return (0); |
return (0); |
} |
} |
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#if 0 |
#if 0 |
if (cnp->cn_namelen == 4 && bcmp(pname, "root", 4) == 0) { |
if (cnp->cn_namelen == 4 && memcmp(pname, "root", 4) == 0) { |
*vpp = rootdir; |
*vpp = rootdir; |
VREF(rootdir); |
VREF(rootdir); |
VOP_LOCK(rootdir); |
vn_lock(rootdir, LK_SHARED | LK_RETRY); |
return (0); |
return (0); |
} |
} |
#endif |
#endif |
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*vpp = NULLVP; |
for (kt = kern_targets, i = 0; i < nkern_targets; kt++, i++) { |
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for (error = ENOENT, kt = kern_targets, i = 0; i < nkern_targets; |
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kt++, i++) { |
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if (cnp->cn_namelen == kt->kt_namlen && |
if (cnp->cn_namelen == kt->kt_namlen && |
bcmp(kt->kt_name, pname, cnp->cn_namelen) == 0) { |
memcmp(kt->kt_name, pname, cnp->cn_namelen) == 0) |
error = 0; |
goto found; |
break; |
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} |
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} |
} |
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#ifdef KERNFS_DIAGNOSTIC |
#ifdef KERNFS_DIAGNOSTIC |
printf("kernfs_lookup: i = %d, error = %d\n", i, error); |
printf("kernfs_lookup: i = %d, failed", i); |
#endif |
#endif |
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if (error) |
vn_lock(dvp, LK_SHARED | LK_RETRY); |
return (error); |
return (cnp->cn_nameiop == LOOKUP ? ENOENT : EROFS); |
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found: |
if (kt->kt_tag == KTT_DEVICE) { |
if (kt->kt_tag == KTT_DEVICE) { |
dev_t *dp = kt->kt_data; |
dev_t *dp = kt->kt_data; |
loop: |
loop: |
if (*dp == NODEV || !vfinddev(*dp, kt->kt_vtype, &fvp)) |
if (*dp == NODEV || !vfinddev(*dp, kt->kt_vtype, &fvp)) { |
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vn_lock(dvp, LK_SHARED | LK_RETRY); |
return (ENOENT); |
return (ENOENT); |
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} |
*vpp = fvp; |
*vpp = fvp; |
if (vget(fvp, 1)) |
if (vget(fvp, LK_EXCLUSIVE)) |
goto loop; |
goto loop; |
return (0); |
return (0); |
} |
} |
Line 279 kernfs_lookup(ap) |
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Line 395 kernfs_lookup(ap) |
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#ifdef KERNFS_DIAGNOSTIC |
#ifdef KERNFS_DIAGNOSTIC |
printf("kernfs_lookup: allocate new vnode\n"); |
printf("kernfs_lookup: allocate new vnode\n"); |
#endif |
#endif |
if (error = getnewvnode(VT_KERNFS, dvp->v_mount, kernfs_vnodeop_p, |
error = getnewvnode(VT_KERNFS, dvp->v_mount, kernfs_vnodeop_p, &fvp); |
&fvp)) |
if (error) { |
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vn_lock(dvp, LK_SHARED | LK_RETRY); |
return (error); |
return (error); |
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} |
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MALLOC(fvp->v_data, void *, sizeof(struct kernfs_node), M_TEMP, |
MALLOC(fvp->v_data, void *, sizeof(struct kernfs_node), M_TEMP, |
M_WAITOK); |
M_WAITOK); |
VTOKERN(fvp)->kf_kt = kt; |
VTOKERN(fvp)->kf_kt = kt; |
fvp->v_type = kt->kt_vtype; |
fvp->v_type = kt->kt_vtype; |
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vn_lock(fvp, LK_SHARED | LK_RETRY); |
*vpp = fvp; |
*vpp = fvp; |
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#ifdef KERNFS_DIAGNOSTIC |
#ifdef KERNFS_DIAGNOSTIC |
printf("kernfs_lookup: newvp = %x\n", fvp); |
printf("kernfs_lookup: newvp = %p\n", fvp); |
#endif |
#endif |
return (0); |
return (0); |
} |
} |
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kernfs_open(ap) |
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struct vop_open_args /* { |
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struct vnode *a_vp; |
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int a_mode; |
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struct ucred *a_cred; |
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struct proc *a_p; |
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} */ *ap; |
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{ |
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/* Only need to check access permissions. */ |
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return (0); |
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} |
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int |
int |
kernfs_access(ap) |
kernfs_access(v) |
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void *v; |
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{ |
struct vop_access_args /* { |
struct vop_access_args /* { |
struct vnode *a_vp; |
struct vnode *a_vp; |
int a_mode; |
int a_mode; |
struct ucred *a_cred; |
struct ucred *a_cred; |
struct proc *a_p; |
struct proc *a_p; |
} */ *ap; |
} */ *ap = v; |
{ |
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struct vnode *vp = ap->a_vp; |
struct vnode *vp = ap->a_vp; |
mode_t fmode = |
mode_t mode; |
(vp->v_flag & VROOT) ? DIR_MODE : VTOKERN(vp)->kf_kt->kt_mode; |
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return (vaccess(fmode, (uid_t)0, (gid_t)0, ap->a_mode, ap->a_cred)); |
if (vp->v_flag & VROOT) { |
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mode = DIR_MODE; |
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} else { |
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struct kern_target *kt = VTOKERN(vp)->kf_kt; |
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mode = kt->kt_mode; |
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} |
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return (vaccess(vp->v_type, mode, (uid_t)0, (gid_t)0, ap->a_mode, |
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ap->a_cred)); |
} |
} |
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kernfs_getattr(ap) |
int |
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kernfs_getattr(v) |
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void *v; |
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{ |
struct vop_getattr_args /* { |
struct vop_getattr_args /* { |
struct vnode *a_vp; |
struct vnode *a_vp; |
struct vattr *a_vap; |
struct vattr *a_vap; |
struct ucred *a_cred; |
struct ucred *a_cred; |
struct proc *a_p; |
struct proc *a_p; |
} */ *ap; |
} */ *ap = v; |
{ |
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struct vnode *vp = ap->a_vp; |
struct vnode *vp = ap->a_vp; |
struct vattr *vap = ap->a_vap; |
struct vattr *vap = ap->a_vap; |
|
struct timeval tv; |
int error = 0; |
int error = 0; |
char strbuf[KSTRING], *buf; |
char strbuf[KSTRING], *buf; |
|
|
bzero((caddr_t) vap, sizeof(*vap)); |
memset((caddr_t) vap, 0, sizeof(*vap)); |
vattr_null(vap); |
vattr_null(vap); |
vap->va_uid = 0; |
vap->va_uid = 0; |
vap->va_gid = 0; |
vap->va_gid = 0; |
vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; |
vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; |
vap->va_size = 0; |
vap->va_size = 0; |
vap->va_blocksize = DEV_BSIZE; |
vap->va_blocksize = DEV_BSIZE; |
microtime(&vap->va_atime); |
microtime(&tv); |
|
TIMEVAL_TO_TIMESPEC(&tv, &vap->va_atime); |
vap->va_mtime = vap->va_atime; |
vap->va_mtime = vap->va_atime; |
vap->va_ctime = vap->va_ctime; |
vap->va_ctime = vap->va_ctime; |
vap->va_gen = 0; |
vap->va_gen = 0; |
Line 370 kernfs_getattr(ap) |
|
Line 488 kernfs_getattr(ap) |
|
vap->va_type = kt->kt_vtype; |
vap->va_type = kt->kt_vtype; |
vap->va_mode = kt->kt_mode; |
vap->va_mode = kt->kt_mode; |
vap->va_nlink = 1; |
vap->va_nlink = 1; |
vap->va_fileid = 1 + (kt - kern_targets) / sizeof(*kt); |
vap->va_fileid = 1 + (kt - kern_targets); |
total = 0; |
total = 0; |
while (buf = strbuf, |
while (buf = strbuf, |
nbytes = kernfs_xread(kt, total, &buf, sizeof(strbuf))) |
nbytes = kernfs_xread(kt, total, &buf, sizeof(strbuf))) |
Line 384 kernfs_getattr(ap) |
|
Line 502 kernfs_getattr(ap) |
|
return (error); |
return (error); |
} |
} |
|
|
kernfs_setattr(ap) |
/*ARGSUSED*/ |
struct vop_setattr_args /* { |
int |
struct vnode *a_vp; |
kernfs_setattr(v) |
struct vattr *a_vap; |
void *v; |
struct ucred *a_cred; |
|
struct proc *a_p; |
|
} */ *ap; |
|
{ |
{ |
|
|
/* |
/* |
* Silently ignore attribute changes. |
* Silently ignore attribute changes. |
* This allows for open with truncate to have no |
* This allows for open with truncate to have no |
Line 403 kernfs_setattr(ap) |
|
Line 517 kernfs_setattr(ap) |
|
} |
} |
|
|
int |
int |
kernfs_read(ap) |
kernfs_read(v) |
|
void *v; |
|
{ |
struct vop_read_args /* { |
struct vop_read_args /* { |
struct vnode *a_vp; |
struct vnode *a_vp; |
struct uio *a_uio; |
struct uio *a_uio; |
int a_ioflag; |
int a_ioflag; |
struct ucred *a_cred; |
struct ucred *a_cred; |
} */ *ap; |
} */ *ap = v; |
{ |
|
struct vnode *vp = ap->a_vp; |
struct vnode *vp = ap->a_vp; |
struct uio *uio = ap->a_uio; |
struct uio *uio = ap->a_uio; |
struct kern_target *kt; |
struct kern_target *kt; |
|
|
if (buf = strbuf, |
if (buf = strbuf, |
#endif |
#endif |
len = kernfs_xread(kt, off, &buf, sizeof(strbuf))) { |
len = kernfs_xread(kt, off, &buf, sizeof(strbuf))) { |
if (error = uiomove(buf, len, uio)) |
if ((error = uiomove(buf, len, uio)) != 0) |
return (error); |
return (error); |
off += len; |
off += len; |
} |
} |
|
|
} |
} |
|
|
int |
int |
kernfs_write(ap) |
kernfs_write(v) |
|
void *v; |
|
{ |
struct vop_write_args /* { |
struct vop_write_args /* { |
struct vnode *a_vp; |
struct vnode *a_vp; |
struct uio *a_uio; |
struct uio *a_uio; |
int a_ioflag; |
int a_ioflag; |
struct ucred *a_cred; |
struct ucred *a_cred; |
} */ *ap; |
} */ *ap = v; |
{ |
|
struct vnode *vp = ap->a_vp; |
struct vnode *vp = ap->a_vp; |
struct uio *uio = ap->a_uio; |
struct uio *uio = ap->a_uio; |
struct kern_target *kt; |
struct kern_target *kt; |
Line 465 kernfs_write(ap) |
|
Line 581 kernfs_write(ap) |
|
return (EINVAL); |
return (EINVAL); |
|
|
xlen = min(uio->uio_resid, KSTRING-1); |
xlen = min(uio->uio_resid, KSTRING-1); |
if (error = uiomove(strbuf, xlen, uio)) |
if ((error = uiomove(strbuf, xlen, uio)) != 0) |
return (error); |
return (error); |
|
|
if (uio->uio_resid != 0) |
if (uio->uio_resid != 0) |
Line 476 kernfs_write(ap) |
|
Line 592 kernfs_write(ap) |
|
return (kernfs_xwrite(kt, strbuf, xlen)); |
return (kernfs_xwrite(kt, strbuf, xlen)); |
} |
} |
|
|
kernfs_readdir(ap) |
int |
|
kernfs_readdir(v) |
|
void *v; |
|
{ |
struct vop_readdir_args /* { |
struct vop_readdir_args /* { |
struct vnode *a_vp; |
struct vnode *a_vp; |
struct uio *a_uio; |
struct uio *a_uio; |
struct ucred *a_cred; |
struct ucred *a_cred; |
int *a_eofflag; |
int *a_eofflag; |
u_long *a_cookies; |
off_t **a_cookies; |
int a_ncookies; |
int a_*ncookies; |
} */ *ap; |
} */ *ap = v; |
{ |
|
struct uio *uio = ap->a_uio; |
struct uio *uio = ap->a_uio; |
struct kern_target *kt; |
|
struct dirent d; |
struct dirent d; |
|
struct kern_target *kt; |
int i; |
int i; |
int error; |
int error; |
|
off_t *cookies = NULL; |
|
int ncookies = 0, nc = 0; |
|
|
if (ap->a_vp->v_type != VDIR) |
if (ap->a_vp->v_type != VDIR) |
return (ENOTDIR); |
return (ENOTDIR); |
|
|
/* |
if (uio->uio_resid < UIO_MX) |
* We don't allow exporting kernfs mounts, and currently local |
return (EINVAL); |
* requests do not need cookies. |
if (uio->uio_offset < 0) |
*/ |
return (EINVAL); |
if (ap->a_ncookies != NULL) |
|
panic("kernfs_readdir: not hungry"); |
|
|
|
i = uio->uio_offset / UIO_MX; |
|
error = 0; |
error = 0; |
|
i = uio->uio_offset; |
|
memset((caddr_t)&d, 0, UIO_MX); |
|
d.d_reclen = UIO_MX; |
|
|
|
if (ap->a_ncookies) { |
|
nc = uio->uio_resid / UIO_MX; |
|
nc = min(nc, (nkern_targets - i)); |
|
MALLOC(cookies, off_t *, nc * sizeof(off_t), M_TEMP, |
|
M_WAITOK); |
|
*ap->a_cookies = cookies; |
|
} |
|
|
for (kt = &kern_targets[i]; |
for (kt = &kern_targets[i]; |
uio->uio_resid >= UIO_MX && i < nkern_targets; kt++, i++) { |
uio->uio_resid >= UIO_MX && i < nkern_targets; kt++, i++) { |
struct dirent *dp = &d; |
|
#ifdef KERNFS_DIAGNOSTIC |
#ifdef KERNFS_DIAGNOSTIC |
printf("kernfs_readdir: i = %d\n", i); |
printf("kernfs_readdir: i = %d\n", i); |
#endif |
#endif |
Line 519 kernfs_readdir(ap) |
|
Line 647 kernfs_readdir(ap) |
|
continue; |
continue; |
} |
} |
|
|
bzero((caddr_t)dp, UIO_MX); |
d.d_fileno = i + 3; |
dp->d_namlen = kt->kt_namlen; |
d.d_namlen = kt->kt_namlen; |
bcopy(kt->kt_name, dp->d_name, kt->kt_namlen+1); |
memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1); |
|
d.d_type = kt->kt_type; |
|
|
#ifdef KERNFS_DIAGNOSTIC |
if ((error = uiomove((caddr_t)&d, UIO_MX, uio)) != 0) |
printf("kernfs_readdir: name = %s, len = %d\n", |
|
dp->d_name, dp->d_namlen); |
|
#endif |
|
/* |
|
* Fill in the remaining fields |
|
*/ |
|
dp->d_reclen = UIO_MX; |
|
dp->d_fileno = i + 3; |
|
dp->d_type = kt->kt_type; |
|
/* |
|
* And ship to userland |
|
*/ |
|
if (error = uiomove((caddr_t)dp, UIO_MX, uio)) |
|
break; |
break; |
|
if (cookies) { |
|
*cookies++ = i + 1; |
|
ncookies++; |
|
} |
} |
} |
|
|
uio->uio_offset = i * UIO_MX; |
if (ap->a_ncookies) { |
|
if (error) { |
|
FREE(*ap->a_cookies, M_TEMP); |
|
*ap->a_ncookies = 0; |
|
*ap->a_cookies = NULL; |
|
} else |
|
*ap->a_ncookies = ncookies; |
|
} |
|
|
|
uio->uio_offset = i; |
return (error); |
return (error); |
} |
} |
|
|
kernfs_inactive(ap) |
int |
|
kernfs_inactive(v) |
|
void *v; |
|
{ |
struct vop_inactive_args /* { |
struct vop_inactive_args /* { |
struct vnode *a_vp; |
struct vnode *a_vp; |
} */ *ap; |
struct proc *a_p; |
{ |
} */ *ap = v; |
struct vnode *vp = ap->a_vp; |
struct vnode *vp = ap->a_vp; |
|
|
#ifdef KERNFS_DIAGNOSTIC |
#ifdef KERNFS_DIAGNOSTIC |
printf("kernfs_inactive(%x)\n", vp); |
printf("kernfs_inactive(%p)\n", vp); |
#endif |
#endif |
/* |
/* |
* Clear out the v_type field to avoid |
* Clear out the v_type field to avoid |
* nasty things happening in vgone(). |
* nasty things happening in vgone(). |
*/ |
*/ |
|
VOP_UNLOCK(vp, 0); |
vp->v_type = VNON; |
vp->v_type = VNON; |
return (0); |
return (0); |
} |
} |
|
|
kernfs_reclaim(ap) |
int |
|
kernfs_reclaim(v) |
|
void *v; |
|
{ |
struct vop_reclaim_args /* { |
struct vop_reclaim_args /* { |
struct vnode *a_vp; |
struct vnode *a_vp; |
} */ *ap; |
} */ *ap = v; |
{ |
|
struct vnode *vp = ap->a_vp; |
struct vnode *vp = ap->a_vp; |
|
|
#ifdef KERNFS_DIAGNOSTIC |
#ifdef KERNFS_DIAGNOSTIC |
printf("kernfs_reclaim(%x)\n", vp); |
printf("kernfs_reclaim(%p)\n", vp); |
#endif |
#endif |
if (vp->v_data) { |
if (vp->v_data) { |
FREE(vp->v_data, M_TEMP); |
FREE(vp->v_data, M_TEMP); |
Line 583 kernfs_reclaim(ap) |
|
Line 717 kernfs_reclaim(ap) |
|
/* |
/* |
* Return POSIX pathconf information applicable to special devices. |
* Return POSIX pathconf information applicable to special devices. |
*/ |
*/ |
kernfs_pathconf(ap) |
int |
|
kernfs_pathconf(v) |
|
void *v; |
|
{ |
struct vop_pathconf_args /* { |
struct vop_pathconf_args /* { |
struct vnode *a_vp; |
struct vnode *a_vp; |
int a_name; |
int a_name; |
register_t *a_retval; |
register_t *a_retval; |
} */ *ap; |
} */ *ap = v; |
{ |
|
|
|
switch (ap->a_name) { |
switch (ap->a_name) { |
case _PC_LINK_MAX: |
case _PC_LINK_MAX: |
Line 610 kernfs_pathconf(ap) |
|
Line 746 kernfs_pathconf(ap) |
|
case _PC_VDISABLE: |
case _PC_VDISABLE: |
*ap->a_retval = _POSIX_VDISABLE; |
*ap->a_retval = _POSIX_VDISABLE; |
return (0); |
return (0); |
|
case _PC_SYNC_IO: |
|
*ap->a_retval = 1; |
|
return (0); |
default: |
default: |
return (EINVAL); |
return (EINVAL); |
} |
} |
Line 620 kernfs_pathconf(ap) |
|
Line 759 kernfs_pathconf(ap) |
|
* Print out the contents of a /dev/fd vnode. |
* Print out the contents of a /dev/fd vnode. |
*/ |
*/ |
/* ARGSUSED */ |
/* ARGSUSED */ |
kernfs_print(ap) |
int |
struct vop_print_args /* { |
kernfs_print(v) |
struct vnode *a_vp; |
void *v; |
} */ *ap; |
|
{ |
{ |
|
|
printf("tag VT_KERNFS, kernfs vnode\n"); |
printf("tag VT_KERNFS, kernfs vnode\n"); |
return (0); |
return (0); |
} |
} |
|
|
/*void*/ |
int |
kernfs_vfree(ap) |
kernfs_link(v) |
struct vop_vfree_args /* { |
void *v; |
struct vnode *a_pvp; |
|
ino_t a_ino; |
|
int a_mode; |
|
} */ *ap; |
|
{ |
|
|
|
return (0); |
|
} |
|
|
|
/* |
|
* /dev/fd vnode unsupported operation |
|
*/ |
|
kernfs_enotsupp() |
|
{ |
{ |
|
struct vop_link_args /* { |
return (EOPNOTSUPP); |
struct vnode *a_dvp; |
|
struct vnode *a_vp; |
|
struct componentname *a_cnp; |
|
} */ *ap = v; |
|
|
|
VOP_ABORTOP(ap->a_dvp, ap->a_cnp); |
|
vput(ap->a_dvp); |
|
return (EROFS); |
} |
} |
|
|
/* |
int |
* /dev/fd "should never get here" operation |
kernfs_symlink(v) |
*/ |
void *v; |
kernfs_badop() |
|
{ |
|
|
|
panic("kernfs: bad op"); |
|
/* NOTREACHED */ |
|
} |
|
|
|
/* |
|
* kernfs vnode null operation |
|
*/ |
|
kernfs_nullop() |
|
{ |
{ |
|
struct vop_symlink_args /* { |
return (0); |
struct vnode *a_dvp; |
|
struct vnode **a_vpp; |
|
struct componentname *a_cnp; |
|
struct vattr *a_vap; |
|
char *a_target; |
|
} */ *ap = v; |
|
|
|
VOP_ABORTOP(ap->a_dvp, ap->a_cnp); |
|
vput(ap->a_dvp); |
|
return (EROFS); |
} |
} |
|
|
#define kernfs_create ((int (*) __P((struct vop_create_args *)))kernfs_enotsupp) |
|
#define kernfs_mknod ((int (*) __P((struct vop_mknod_args *)))kernfs_enotsupp) |
|
#define kernfs_close ((int (*) __P((struct vop_close_args *)))nullop) |
|
#define kernfs_ioctl ((int (*) __P((struct vop_ioctl_args *)))kernfs_enotsupp) |
|
#define kernfs_select ((int (*) __P((struct vop_select_args *)))kernfs_enotsupp) |
|
#define kernfs_mmap ((int (*) __P((struct vop_mmap_args *)))kernfs_enotsupp) |
|
#define kernfs_fsync ((int (*) __P((struct vop_fsync_args *)))nullop) |
|
#define kernfs_seek ((int (*) __P((struct vop_seek_args *)))nullop) |
|
#define kernfs_remove ((int (*) __P((struct vop_remove_args *)))kernfs_enotsupp) |
|
#define kernfs_link ((int (*) __P((struct vop_link_args *)))kernfs_enotsupp) |
|
#define kernfs_rename ((int (*) __P((struct vop_rename_args *)))kernfs_enotsupp) |
|
#define kernfs_mkdir ((int (*) __P((struct vop_mkdir_args *)))kernfs_enotsupp) |
|
#define kernfs_rmdir ((int (*) __P((struct vop_rmdir_args *)))kernfs_enotsupp) |
|
#define kernfs_symlink ((int (*) __P((struct vop_symlink_args *)))kernfs_enotsupp) |
|
#define kernfs_readlink \ |
|
((int (*) __P((struct vop_readlink_args *)))kernfs_enotsupp) |
|
#define kernfs_abortop ((int (*) __P((struct vop_abortop_args *)))nullop) |
|
#define kernfs_lock ((int (*) __P((struct vop_lock_args *)))nullop) |
|
#define kernfs_unlock ((int (*) __P((struct vop_unlock_args *)))nullop) |
|
#define kernfs_bmap ((int (*) __P((struct vop_bmap_args *)))kernfs_badop) |
|
#define kernfs_strategy ((int (*) __P((struct vop_strategy_args *)))kernfs_badop) |
|
#define kernfs_islocked ((int (*) __P((struct vop_islocked_args *)))nullop) |
|
#define kernfs_advlock ((int (*) __P((struct vop_advlock_args *)))kernfs_enotsupp) |
|
#define kernfs_blkatoff \ |
|
((int (*) __P((struct vop_blkatoff_args *)))kernfs_enotsupp) |
|
#define kernfs_valloc ((int(*) __P(( \ |
|
struct vnode *pvp, \ |
|
int mode, \ |
|
struct ucred *cred, \ |
|
struct vnode **vpp))) kernfs_enotsupp) |
|
#define kernfs_truncate \ |
|
((int (*) __P((struct vop_truncate_args *)))kernfs_enotsupp) |
|
#define kernfs_update ((int (*) __P((struct vop_update_args *)))kernfs_enotsupp) |
|
#define kernfs_bwrite ((int (*) __P((struct vop_bwrite_args *)))kernfs_enotsupp) |
|
|
|
int (**kernfs_vnodeop_p)(); |
|
struct vnodeopv_entry_desc kernfs_vnodeop_entries[] = { |
|
{ &vop_default_desc, vn_default_error }, |
|
{ &vop_lookup_desc, kernfs_lookup }, /* lookup */ |
|
{ &vop_create_desc, kernfs_create }, /* create */ |
|
{ &vop_mknod_desc, kernfs_mknod }, /* mknod */ |
|
{ &vop_open_desc, kernfs_open }, /* open */ |
|
{ &vop_close_desc, kernfs_close }, /* close */ |
|
{ &vop_access_desc, kernfs_access }, /* access */ |
|
{ &vop_getattr_desc, kernfs_getattr }, /* getattr */ |
|
{ &vop_setattr_desc, kernfs_setattr }, /* setattr */ |
|
{ &vop_read_desc, kernfs_read }, /* read */ |
|
{ &vop_write_desc, kernfs_write }, /* write */ |
|
{ &vop_ioctl_desc, kernfs_ioctl }, /* ioctl */ |
|
{ &vop_select_desc, kernfs_select }, /* select */ |
|
{ &vop_mmap_desc, kernfs_mmap }, /* mmap */ |
|
{ &vop_fsync_desc, kernfs_fsync }, /* fsync */ |
|
{ &vop_seek_desc, kernfs_seek }, /* seek */ |
|
{ &vop_remove_desc, kernfs_remove }, /* remove */ |
|
{ &vop_link_desc, kernfs_link }, /* link */ |
|
{ &vop_rename_desc, kernfs_rename }, /* rename */ |
|
{ &vop_mkdir_desc, kernfs_mkdir }, /* mkdir */ |
|
{ &vop_rmdir_desc, kernfs_rmdir }, /* rmdir */ |
|
{ &vop_symlink_desc, kernfs_symlink }, /* symlink */ |
|
{ &vop_readdir_desc, kernfs_readdir }, /* readdir */ |
|
{ &vop_readlink_desc, kernfs_readlink },/* readlink */ |
|
{ &vop_abortop_desc, kernfs_abortop }, /* abortop */ |
|
{ &vop_inactive_desc, kernfs_inactive },/* inactive */ |
|
{ &vop_reclaim_desc, kernfs_reclaim }, /* reclaim */ |
|
{ &vop_lock_desc, kernfs_lock }, /* lock */ |
|
{ &vop_unlock_desc, kernfs_unlock }, /* unlock */ |
|
{ &vop_bmap_desc, kernfs_bmap }, /* bmap */ |
|
{ &vop_strategy_desc, kernfs_strategy },/* strategy */ |
|
{ &vop_print_desc, kernfs_print }, /* print */ |
|
{ &vop_islocked_desc, kernfs_islocked },/* islocked */ |
|
{ &vop_pathconf_desc, kernfs_pathconf },/* pathconf */ |
|
{ &vop_advlock_desc, kernfs_advlock }, /* advlock */ |
|
{ &vop_blkatoff_desc, kernfs_blkatoff },/* blkatoff */ |
|
{ &vop_valloc_desc, kernfs_valloc }, /* valloc */ |
|
{ &vop_vfree_desc, kernfs_vfree }, /* vfree */ |
|
{ &vop_truncate_desc, kernfs_truncate },/* truncate */ |
|
{ &vop_update_desc, kernfs_update }, /* update */ |
|
{ &vop_bwrite_desc, kernfs_bwrite }, /* bwrite */ |
|
{ (struct vnodeop_desc*)NULL, (int(*)())NULL } |
|
}; |
|
struct vnodeopv_desc kernfs_vnodeop_opv_desc = |
|
{ &kernfs_vnodeop_p, kernfs_vnodeop_entries }; |
|