version 1.46, 1996/10/10 22:54:08 |
version 1.153, 2014/07/20 13:58:04 |
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* 2. Redistributions in binary form must reproduce the above copyright |
* 2. Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* documentation and/or other materials provided with the distribution. |
* 3. All advertising materials mentioning features or use of this software |
* 3. Neither the name of the University nor the names of its contributors |
* must display the following acknowledgement: |
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* This product includes software developed by the University of |
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* California, Berkeley and its contributors. |
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* 4. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
* may be used to endorse or promote products derived from this software |
* without specific prior written permission. |
* without specific prior written permission. |
* |
* |
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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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#include <sys/cdefs.h> |
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__KERNEL_RCSID(0, "$NetBSD$"); |
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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> |
#include <sys/vmmeter.h> |
#include <sys/vmmeter.h> |
#include <sys/types.h> |
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#include <sys/time.h> |
#include <sys/time.h> |
#include <sys/proc.h> |
#include <sys/proc.h> |
#include <sys/vnode.h> |
#include <sys/vnode.h> |
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#include <miscfs/genfs/genfs.h> |
#include <miscfs/genfs/genfs.h> |
#include <miscfs/kernfs/kernfs.h> |
#include <miscfs/kernfs/kernfs.h> |
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#include <miscfs/specfs/specdev.h> |
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#include <uvm/uvm_extern.h> |
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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 READ_MODE (S_IRUSR|S_IRGRP|S_IROTH) |
#define READ_MODE (S_IRUSR|S_IRGRP|S_IROTH) |
#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 UREAD_MODE (S_IRUSR) |
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#define DIR_MODE (S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) |
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#define UDIR_MODE (S_IRUSR|S_IXUSR) |
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struct kern_target { |
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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 */ |
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#define N(s) sizeof(s)-1, s |
#define N(s) sizeof(s)-1, s |
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const struct kern_target kern_targets[] = { |
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/* NOTE: The name must be less than UIO_MX-16 chars in length */ |
/* name data tag type ro/rw */ |
/* name data tag type ro/rw */ |
{ DT_DIR, N("."), 0, KTT_NULL, VDIR, DIR_MODE }, |
{ DT_DIR, N("."), 0, KFSkern, VDIR, DIR_MODE }, |
{ DT_DIR, N(".."), 0, KTT_NULL, VDIR, DIR_MODE }, |
{ DT_DIR, N(".."), 0, KFSroot, VDIR, DIR_MODE }, |
{ DT_REG, N("boottime"), &boottime.tv_sec, KTT_INT, VREG, READ_MODE }, |
{ DT_REG, N("boottime"), &boottime.tv_sec, KFSint, VREG, READ_MODE }, |
{ DT_REG, N("copyright"), copyright, KTT_STRING, VREG, READ_MODE }, |
/* XXXUNCONST */ |
{ DT_REG, N("hostname"), 0, KTT_HOSTNAME, VREG, WRITE_MODE }, |
{ DT_REG, N("copyright"), __UNCONST(copyright), |
{ DT_REG, N("hz"), &hz, KTT_INT, VREG, READ_MODE }, |
KFSstring, VREG, READ_MODE }, |
{ DT_REG, N("loadavg"), 0, KTT_AVENRUN, VREG, READ_MODE }, |
{ DT_REG, N("hostname"), 0, KFShostname, VREG, WRITE_MODE }, |
{ DT_REG, N("msgbuf"), 0, KTT_MSGBUF, VREG, READ_MODE }, |
{ DT_REG, N("hz"), &hz, KFSint, VREG, READ_MODE }, |
{ DT_REG, N("pagesize"), &cnt.v_page_size, KTT_INT, VREG, READ_MODE }, |
{ DT_REG, N("loadavg"), 0, KFSavenrun, VREG, READ_MODE }, |
{ DT_REG, N("physmem"), &physmem, KTT_INT, VREG, READ_MODE }, |
{ DT_REG, N("msgbuf"), 0, KFSmsgbuf, VREG, READ_MODE }, |
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{ DT_REG, N("pagesize"), &uvmexp.pagesize, KFSint, VREG, READ_MODE }, |
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{ DT_REG, N("physmem"), &physmem, KFSint, VREG, READ_MODE }, |
#if 0 |
#if 0 |
{ DT_DIR, N("root"), 0, KTT_NULL, VDIR, DIR_MODE }, |
{ DT_DIR, N("root"), 0, KFSnull, VDIR, DIR_MODE }, |
#endif |
#endif |
{ DT_BLK, N("rootdev"), &rootdev, KTT_DEVICE, VBLK, READ_MODE }, |
{ DT_BLK, N("rootdev"), &rootdev, KFSdevice, VBLK, READ_MODE }, |
{ DT_CHR, N("rrootdev"), &rrootdev, KTT_DEVICE, VCHR, READ_MODE }, |
{ DT_CHR, N("rrootdev"), &rrootdev, KFSdevice, VCHR, READ_MODE }, |
{ DT_REG, N("time"), 0, KTT_TIME, VREG, READ_MODE }, |
{ DT_REG, N("time"), 0, KFStime, VREG, READ_MODE }, |
{ DT_REG, N("version"), version, KTT_STRING, VREG, READ_MODE }, |
/* XXXUNCONST */ |
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{ DT_REG, N("version"), __UNCONST(version), |
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KFSstring, VREG, READ_MODE }, |
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}; |
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const struct kern_target subdir_targets[] = { |
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/* NOTE: The name must be less than UIO_MX-16 chars in length */ |
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/* name data tag type ro/rw */ |
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{ DT_DIR, N("."), 0, KFSsubdir, VDIR, DIR_MODE }, |
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{ DT_DIR, N(".."), 0, KFSkern, VDIR, DIR_MODE }, |
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}; |
#undef N |
#undef N |
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SIMPLEQ_HEAD(,dyn_kern_target) dyn_kern_targets = |
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SIMPLEQ_HEAD_INITIALIZER(dyn_kern_targets); |
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int nkern_targets = sizeof(kern_targets) / sizeof(kern_targets[0]); |
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const int static_nkern_targets = sizeof(kern_targets) / sizeof(kern_targets[0]); |
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int nkern_dirs = 2; |
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int kernfs_try_fileop(kfstype, kfsfileop, void *, int); |
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int kernfs_try_xread(kfstype, const struct kernfs_node *, char **, |
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size_t, int); |
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int kernfs_try_xwrite(kfstype, const struct kernfs_node *, char *, |
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size_t, int); |
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static int kernfs_default_xread(void *v); |
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static int kernfs_default_xwrite(void *v); |
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static int kernfs_default_fileop_getattr(void *); |
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/* must include all fileop's */ |
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const struct kernfs_fileop kernfs_default_fileops[] = { |
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{ .kf_fileop = KERNFS_XREAD }, |
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{ .kf_fileop = KERNFS_XWRITE }, |
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{ .kf_fileop = KERNFS_FILEOP_OPEN }, |
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{ .kf_fileop = KERNFS_FILEOP_GETATTR, |
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.kf_vop = kernfs_default_fileop_getattr }, |
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{ .kf_fileop = KERNFS_FILEOP_IOCTL }, |
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{ .kf_fileop = KERNFS_FILEOP_CLOSE }, |
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{ .kf_fileop = KERNFS_FILEOP_READ, |
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.kf_vop = kernfs_default_xread }, |
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{ .kf_fileop = KERNFS_FILEOP_WRITE, |
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.kf_vop = kernfs_default_xwrite }, |
}; |
}; |
static int nkern_targets = sizeof(kern_targets) / sizeof(kern_targets[0]); |
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int kernfs_lookup __P((void *)); |
int kernfs_lookup(void *); |
#define kernfs_create genfs_eopnotsupp |
#define kernfs_create genfs_eopnotsupp |
#define kernfs_mknod genfs_eopnotsupp |
#define kernfs_mknod genfs_eopnotsupp |
#define kernfs_open genfs_nullop |
int kernfs_open(void *); |
#define kernfs_close genfs_nullop |
int kernfs_close(void *); |
int kernfs_access __P((void *)); |
int kernfs_access(void *); |
int kernfs_getattr __P((void *)); |
int kernfs_getattr(void *); |
int kernfs_setattr __P((void *)); |
int kernfs_setattr(void *); |
int kernfs_read __P((void *)); |
int kernfs_read(void *); |
int kernfs_write __P((void *)); |
int kernfs_write(void *); |
#define kernfs_ioctl genfs_eopnotsupp |
#define kernfs_fcntl genfs_fcntl |
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int kernfs_ioctl(void *); |
#define kernfs_poll genfs_poll |
#define kernfs_poll genfs_poll |
#define kernfs_mmap genfs_eopnotsupp |
#define kernfs_revoke genfs_revoke |
#define kernfs_fsync genfs_nullop |
#define kernfs_fsync genfs_nullop |
#define kernfs_seek genfs_nullop |
#define kernfs_seek genfs_nullop |
#define kernfs_remove genfs_eopnotsupp |
#define kernfs_remove genfs_eopnotsupp |
int kernfs_link __P((void *)); |
int kernfs_link(void *); |
#define kernfs_rename genfs_eopnotsupp |
#define kernfs_rename genfs_eopnotsupp |
#define kernfs_mkdir genfs_eopnotsupp |
#define kernfs_mkdir genfs_eopnotsupp |
#define kernfs_rmdir genfs_eopnotsupp |
#define kernfs_rmdir genfs_eopnotsupp |
int kernfs_symlink __P((void *)); |
int kernfs_symlink(void *); |
int kernfs_readdir __P((void *)); |
int kernfs_readdir(void *); |
#define kernfs_readlink genfs_eopnotsupp |
#define kernfs_readlink genfs_eopnotsupp |
#define kernfs_abortop genfs_abortop |
#define kernfs_abortop genfs_abortop |
int kernfs_inactive __P((void *)); |
int kernfs_inactive(void *); |
int kernfs_reclaim __P((void *)); |
int kernfs_reclaim(void *); |
#define kernfs_lock genfs_nullop |
#define kernfs_lock genfs_lock |
#define kernfs_unlock genfs_nullop |
#define kernfs_unlock genfs_unlock |
#define kernfs_bmap genfs_badop |
#define kernfs_bmap genfs_badop |
#define kernfs_strategy genfs_badop |
#define kernfs_strategy genfs_badop |
int kernfs_print __P((void *)); |
int kernfs_print(void *); |
#define kernfs_islocked genfs_nullop |
#define kernfs_islocked genfs_islocked |
int kernfs_pathconf __P((void *)); |
int kernfs_pathconf(void *); |
#define kernfs_advlock genfs_eopnotsupp |
#define kernfs_advlock genfs_einval |
#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 |
#define kernfs_bwrite genfs_eopnotsupp |
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#define kernfs_putpages genfs_putpages |
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int kernfs_xread __P((struct kern_target *, int, char **, int)); |
static int kernfs_xread(struct kernfs_node *, int, char **, |
int kernfs_xwrite __P((struct kern_target *, char *, int)); |
size_t, size_t *); |
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static int kernfs_xwrite(const struct kernfs_node *, char *, size_t); |
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int (**kernfs_vnodeop_p) __P((void *)); |
int (**kernfs_vnodeop_p)(void *); |
struct vnodeopv_entry_desc kernfs_vnodeop_entries[] = { |
const struct vnodeopv_entry_desc kernfs_vnodeop_entries[] = { |
{ &vop_default_desc, vn_default_error }, |
{ &vop_default_desc, vn_default_error }, |
{ &vop_lookup_desc, kernfs_lookup }, /* lookup */ |
{ &vop_lookup_desc, kernfs_lookup }, /* lookup */ |
{ &vop_create_desc, kernfs_create }, /* create */ |
{ &vop_create_desc, kernfs_create }, /* create */ |
Line 167 struct vnodeopv_entry_desc kernfs_vnodeo |
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Line 191 struct vnodeopv_entry_desc kernfs_vnodeo |
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{ &vop_setattr_desc, kernfs_setattr }, /* setattr */ |
{ &vop_setattr_desc, kernfs_setattr }, /* setattr */ |
{ &vop_read_desc, kernfs_read }, /* read */ |
{ &vop_read_desc, kernfs_read }, /* read */ |
{ &vop_write_desc, kernfs_write }, /* write */ |
{ &vop_write_desc, kernfs_write }, /* write */ |
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{ &vop_fcntl_desc, kernfs_fcntl }, /* fcntl */ |
{ &vop_ioctl_desc, kernfs_ioctl }, /* ioctl */ |
{ &vop_ioctl_desc, kernfs_ioctl }, /* ioctl */ |
{ &vop_poll_desc, kernfs_poll }, /* poll */ |
{ &vop_poll_desc, kernfs_poll }, /* poll */ |
{ &vop_mmap_desc, kernfs_mmap }, /* mmap */ |
{ &vop_revoke_desc, kernfs_revoke }, /* revoke */ |
{ &vop_fsync_desc, kernfs_fsync }, /* fsync */ |
{ &vop_fsync_desc, kernfs_fsync }, /* fsync */ |
{ &vop_seek_desc, kernfs_seek }, /* seek */ |
{ &vop_seek_desc, kernfs_seek }, /* seek */ |
{ &vop_remove_desc, kernfs_remove }, /* remove */ |
{ &vop_remove_desc, kernfs_remove }, /* remove */ |
Line 191 struct vnodeopv_entry_desc kernfs_vnodeo |
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Line 216 struct vnodeopv_entry_desc kernfs_vnodeo |
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{ &vop_islocked_desc, kernfs_islocked }, /* islocked */ |
{ &vop_islocked_desc, kernfs_islocked }, /* islocked */ |
{ &vop_pathconf_desc, kernfs_pathconf }, /* pathconf */ |
{ &vop_pathconf_desc, kernfs_pathconf }, /* pathconf */ |
{ &vop_advlock_desc, kernfs_advlock }, /* advlock */ |
{ &vop_advlock_desc, kernfs_advlock }, /* advlock */ |
{ &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 */ |
{ &vop_bwrite_desc, kernfs_bwrite }, /* bwrite */ |
{ (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL } |
{ &vop_putpages_desc, kernfs_putpages }, /* putpages */ |
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{ NULL, NULL } |
}; |
}; |
struct vnodeopv_desc kernfs_vnodeop_opv_desc = |
const struct vnodeopv_desc kernfs_vnodeop_opv_desc = |
{ &kernfs_vnodeop_p, kernfs_vnodeop_entries }; |
{ &kernfs_vnodeop_p, kernfs_vnodeop_entries }; |
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static inline int |
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kernfs_fileop_compare(struct kernfs_fileop *a, struct kernfs_fileop *b) |
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{ |
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if (a->kf_type < b->kf_type) |
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return -1; |
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if (a->kf_type > b->kf_type) |
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return 1; |
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if (a->kf_fileop < b->kf_fileop) |
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return -1; |
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if (a->kf_fileop > b->kf_fileop) |
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return 1; |
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return (0); |
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} |
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SPLAY_HEAD(kfsfileoptree, kernfs_fileop) kfsfileoptree = |
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SPLAY_INITIALIZER(kfsfileoptree); |
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SPLAY_PROTOTYPE(kfsfileoptree, kernfs_fileop, kf_node, kernfs_fileop_compare); |
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SPLAY_GENERATE(kfsfileoptree, kernfs_fileop, kf_node, kernfs_fileop_compare); |
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kfstype |
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kernfs_alloctype(int nkf, const struct kernfs_fileop *kf) |
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{ |
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static u_char nextfreetype = KFSlasttype; |
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struct kernfs_fileop *dkf, *fkf, skf; |
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int i; |
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/* XXX need to keep track of dkf's memory if we support |
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deallocating types */ |
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dkf = malloc(sizeof(kernfs_default_fileops), M_TEMP, M_WAITOK); |
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memcpy(dkf, kernfs_default_fileops, sizeof(kernfs_default_fileops)); |
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for (i = 0; i < sizeof(kernfs_default_fileops) / |
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sizeof(kernfs_default_fileops[0]); i++) { |
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dkf[i].kf_type = nextfreetype; |
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SPLAY_INSERT(kfsfileoptree, &kfsfileoptree, &dkf[i]); |
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} |
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for (i = 0; i < nkf; i++) { |
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skf.kf_type = nextfreetype; |
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skf.kf_fileop = kf[i].kf_fileop; |
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if ((fkf = SPLAY_FIND(kfsfileoptree, &kfsfileoptree, &skf))) |
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fkf->kf_vop = kf[i].kf_vop; |
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} |
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return nextfreetype++; |
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} |
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int |
int |
kernfs_xread(kt, off, bufp, len) |
kernfs_try_fileop(kfstype type, kfsfileop fileop, void *v, int error) |
struct kern_target *kt; |
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int off; |
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char **bufp; |
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int len; |
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{ |
{ |
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struct kernfs_fileop *kf, skf; |
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skf.kf_type = type; |
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skf.kf_fileop = fileop; |
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if ((kf = SPLAY_FIND(kfsfileoptree, &kfsfileoptree, &skf))) |
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if (kf->kf_vop) |
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return kf->kf_vop(v); |
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return error; |
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} |
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switch (kt->kt_tag) { |
int |
case KTT_TIME: { |
kernfs_try_xread(kfstype type, const struct kernfs_node *kfs, char **bfp, |
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size_t len, int error) |
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{ |
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struct kernfs_fileop *kf, skf; |
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skf.kf_type = type; |
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skf.kf_fileop = KERNFS_XREAD; |
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if ((kf = SPLAY_FIND(kfsfileoptree, &kfsfileoptree, &skf))) |
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if (kf->kf_xread) |
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return kf->kf_xread(kfs, bfp, len); |
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return error; |
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} |
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int |
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kernfs_try_xwrite(kfstype type, const struct kernfs_node *kfs, char *bf, |
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size_t len, int error) |
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{ |
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struct kernfs_fileop *kf, skf; |
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skf.kf_type = type; |
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skf.kf_fileop = KERNFS_XWRITE; |
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if ((kf = SPLAY_FIND(kfsfileoptree, &kfsfileoptree, &skf))) |
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if (kf->kf_xwrite) |
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return kf->kf_xwrite(kfs, bf, len); |
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return error; |
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} |
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int |
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kernfs_addentry(kernfs_parentdir_t *pkt, kernfs_entry_t *dkt) |
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{ |
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struct kernfs_subdir *ks, *parent; |
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if (pkt == NULL) { |
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SIMPLEQ_INSERT_TAIL(&dyn_kern_targets, dkt, dkt_queue); |
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nkern_targets++; |
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if (dkt->dkt_kt.kt_vtype == VDIR) |
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nkern_dirs++; |
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} else { |
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parent = (struct kernfs_subdir *)pkt->kt_data; |
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SIMPLEQ_INSERT_TAIL(&parent->ks_entries, dkt, dkt_queue); |
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parent->ks_nentries++; |
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if (dkt->dkt_kt.kt_vtype == VDIR) |
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parent->ks_dirs++; |
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} |
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if (dkt->dkt_kt.kt_vtype == VDIR && dkt->dkt_kt.kt_data == NULL) { |
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ks = malloc(sizeof(struct kernfs_subdir), |
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M_TEMP, M_WAITOK); |
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SIMPLEQ_INIT(&ks->ks_entries); |
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ks->ks_nentries = 2; /* . and .. */ |
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ks->ks_dirs = 2; |
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ks->ks_parent = pkt ? pkt : &kern_targets[0]; |
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dkt->dkt_kt.kt_data = ks; |
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} |
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return 0; |
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} |
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static int |
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kernfs_xread(struct kernfs_node *kfs, int off, char **bufp, size_t len, size_t *wrlen) |
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{ |
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const struct kern_target *kt; |
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int err; |
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kt = kfs->kfs_kt; |
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switch (kfs->kfs_type) { |
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case KFStime: { |
struct timeval tv; |
struct timeval tv; |
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microtime(&tv); |
microtime(&tv); |
ksprintf(*bufp, "%ld %ld\n", tv.tv_sec, tv.tv_usec); |
snprintf(*bufp, len, "%lld %ld\n", (long long)tv.tv_sec, |
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(long)tv.tv_usec); |
break; |
break; |
} |
} |
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case KTT_INT: { |
case KFSint: { |
int *ip = kt->kt_data; |
int *ip = kt->kt_data; |
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ksprintf(*bufp, "%d\n", *ip); |
snprintf(*bufp, len, "%d\n", *ip); |
break; |
break; |
} |
} |
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case KTT_STRING: { |
case KFSstring: { |
char *cp = kt->kt_data; |
char *cp = kt->kt_data; |
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*bufp = cp; |
*bufp = cp; |
break; |
break; |
} |
} |
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case KTT_MSGBUF: { |
case KFSmsgbuf: { |
extern struct msgbuf *msgbufp; |
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long n; |
long n; |
|
|
if (off >= MSG_BSIZE) |
/* |
|
* deal with cases where the message buffer has |
|
* become corrupted. |
|
*/ |
|
if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { |
|
msgbufenabled = 0; |
|
return (ENXIO); |
|
} |
|
|
|
/* |
|
* Note that reads of /kern/msgbuf won't necessarily yield |
|
* consistent results, if the message buffer is modified |
|
* while the read is in progress. The worst that can happen |
|
* is that incorrect data will be read. There's no way |
|
* that this can crash the system unless the values in the |
|
* message buffer header are corrupted, but that'll cause |
|
* the system to die anyway. |
|
*/ |
|
if (off >= msgbufp->msg_bufs) { |
|
*wrlen = 0; |
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); |
*wrlen = len; |
|
return (0); |
} |
} |
|
|
case KTT_HOSTNAME: { |
case KFShostname: { |
char *cp = hostname; |
char *cp = hostname; |
int xlen = hostnamelen; |
size_t xlen = hostnamelen; |
|
|
if (xlen >= (len-2)) |
if (xlen >= (len - 2)) |
return (EINVAL); |
return (EINVAL); |
|
|
bcopy(cp, *bufp, xlen); |
memcpy(*bufp, cp, xlen); |
(*bufp)[xlen] = '\n'; |
(*bufp)[xlen] = '\n'; |
(*bufp)[xlen+1] = '\0'; |
(*bufp)[xlen+1] = '\0'; |
break; |
break; |
} |
} |
|
|
case KTT_AVENRUN: |
case KFSavenrun: |
averunnable.fscale = FSCALE; |
averunnable.fscale = FSCALE; |
ksprintf(*bufp, "%d %d %d %ld\n", |
snprintf(*bufp, len, "%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; |
|
|
default: |
default: |
return (0); |
err = kernfs_try_xread(kfs->kfs_type, kfs, bufp, len, |
|
EOPNOTSUPP); |
|
if (err) |
|
return err; |
} |
} |
|
|
len = strlen(*bufp); |
len = strlen(*bufp); |
if (len <= off) |
if (len <= off) |
return (0); |
*wrlen = 0; |
*bufp += off; |
else { |
return (len - off); |
*bufp += off; |
|
*wrlen = len - off; |
|
} |
|
return (0); |
} |
} |
|
|
int |
static int |
kernfs_xwrite(kt, buf, len) |
kernfs_xwrite(const struct kernfs_node *kfs, char *bf, size_t len) |
struct kern_target *kt; |
|
char *buf; |
|
int len; |
|
{ |
{ |
|
|
switch (kt->kt_tag) { |
switch (kfs->kfs_type) { |
case KTT_HOSTNAME: |
case KFShostname: |
if (buf[len-1] == '\n') |
if (bf[len-1] == '\n') |
--len; |
--len; |
bcopy(buf, hostname, len); |
memcpy(hostname, bf, len); |
hostname[len] = '\0'; |
hostname[len] = '\0'; |
hostnamelen = len; |
hostnamelen = (size_t) len; |
return (0); |
return (0); |
|
|
default: |
default: |
return (EIO); |
return kernfs_try_xwrite(kfs->kfs_type, kfs, bf, len, EIO); |
} |
} |
} |
} |
|
|
Line 305 kernfs_xwrite(kt, buf, len) |
|
Line 467 kernfs_xwrite(kt, buf, len) |
|
* ndp is the name to locate in that directory... |
* ndp is the name to locate in that directory... |
*/ |
*/ |
int |
int |
kernfs_lookup(v) |
kernfs_lookup(void *v) |
void *v; |
|
{ |
{ |
struct vop_lookup_args /* { |
struct vop_lookup_v2_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; |
Line 316 kernfs_lookup(v) |
|
Line 477 kernfs_lookup(v) |
|
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; |
const struct kernfs_node *kfs; |
struct vnode *fvp; |
const struct kern_target *kt; |
|
const struct dyn_kern_target *dkt; |
|
const struct kernfs_subdir *ks; |
int error, i; |
int error, i; |
|
|
#ifdef KERNFS_DIAGNOSTIC |
|
kprintf("kernfs_lookup(%x)\n", ap); |
|
kprintf("kernfs_lookup(dp = %x, vpp = %x, cnp = %x)\n", dvp, vpp, ap->a_cnp); |
|
kprintf("kernfs_lookup(%s)\n", pname); |
|
#endif |
|
|
|
*vpp = NULLVP; |
*vpp = NULLVP; |
|
|
if (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME) |
if (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME) |
Line 334 kernfs_lookup(v) |
|
Line 491 kernfs_lookup(v) |
|
|
|
if (cnp->cn_namelen == 1 && *pname == '.') { |
if (cnp->cn_namelen == 1 && *pname == '.') { |
*vpp = dvp; |
*vpp = dvp; |
VREF(dvp); |
vref(dvp); |
/*VOP_LOCK(dvp);*/ |
|
return (0); |
return (0); |
} |
} |
|
|
#if 0 |
kfs = VTOKERN(dvp); |
if (cnp->cn_namelen == 4 && bcmp(pname, "root", 4) == 0) { |
switch (kfs->kfs_type) { |
*vpp = rootdir; |
case KFSkern: |
VREF(rootdir); |
/* |
VOP_LOCK(rootdir); |
* Shouldn't get here with .. in the root node. |
return (0); |
*/ |
} |
if (cnp->cn_flags & ISDOTDOT) |
#endif |
return (EIO); |
|
|
|
for (i = 0; i < static_nkern_targets; i++) { |
|
kt = &kern_targets[i]; |
|
if (cnp->cn_namelen == kt->kt_namlen && |
|
memcmp(kt->kt_name, pname, cnp->cn_namelen) == 0) |
|
goto found; |
|
} |
|
SIMPLEQ_FOREACH(dkt, &dyn_kern_targets, dkt_queue) { |
|
if (cnp->cn_namelen == dkt->dkt_kt.kt_namlen && |
|
memcmp(dkt->dkt_kt.kt_name, pname, cnp->cn_namelen) == 0) { |
|
kt = &dkt->dkt_kt; |
|
goto found; |
|
} |
|
} |
|
break; |
|
|
for (kt = kern_targets, i = 0; i < nkern_targets; kt++, i++) { |
found: |
if (cnp->cn_namelen == kt->kt_namlen && |
error = vcache_get(dvp->v_mount, &kt, sizeof(kt), vpp); |
bcmp(kt->kt_name, pname, cnp->cn_namelen) == 0) |
return error; |
|
|
|
case KFSsubdir: |
|
ks = (struct kernfs_subdir *)kfs->kfs_kt->kt_data; |
|
if (cnp->cn_flags & ISDOTDOT) { |
|
kt = ks->ks_parent; |
goto found; |
goto found; |
} |
} |
|
|
#ifdef KERNFS_DIAGNOSTIC |
SIMPLEQ_FOREACH(dkt, &ks->ks_entries, dkt_queue) { |
kprintf("kernfs_lookup: i = %d, failed", i); |
if (cnp->cn_namelen == dkt->dkt_kt.kt_namlen && |
#endif |
memcmp(dkt->dkt_kt.kt_name, pname, cnp->cn_namelen) == 0) { |
|
kt = &dkt->dkt_kt; |
|
goto found; |
|
} |
|
} |
|
break; |
|
|
|
default: |
|
return (ENOTDIR); |
|
} |
|
|
return (cnp->cn_nameiop == LOOKUP ? ENOENT : EROFS); |
return (cnp->cn_nameiop == LOOKUP ? ENOENT : EROFS); |
|
} |
|
|
found: |
int |
if (kt->kt_tag == KTT_DEVICE) { |
kernfs_open(void *v) |
dev_t *dp = kt->kt_data; |
{ |
loop: |
struct vop_open_args /* { |
if (*dp == NODEV || !vfinddev(*dp, kt->kt_vtype, &fvp)) |
struct vnode *a_vp; |
return (ENOENT); |
int a_mode; |
*vpp = fvp; |
kauth_cred_t a_cred; |
if (vget(fvp, 1)) |
} */ *ap = v; |
goto loop; |
struct kernfs_node *kfs = VTOKERN(ap->a_vp); |
return (0); |
|
} |
|
|
|
#ifdef KERNFS_DIAGNOSTIC |
return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_OPEN, v, 0); |
kprintf("kernfs_lookup: allocate new vnode\n"); |
} |
#endif |
|
error = getnewvnode(VT_KERNFS, dvp->v_mount, kernfs_vnodeop_p, &fvp); |
|
if (error) |
|
return (error); |
|
|
|
MALLOC(fvp->v_data, void *, sizeof(struct kernfs_node), M_TEMP, |
int |
M_WAITOK); |
kernfs_close(void *v) |
VTOKERN(fvp)->kf_kt = kt; |
{ |
fvp->v_type = kt->kt_vtype; |
struct vop_close_args /* { |
*vpp = fvp; |
struct vnode *a_vp; |
|
int a_fflag; |
|
kauth_cred_t a_cred; |
|
} */ *ap = v; |
|
struct kernfs_node *kfs = VTOKERN(ap->a_vp); |
|
|
#ifdef KERNFS_DIAGNOSTIC |
return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_CLOSE, v, 0); |
kprintf("kernfs_lookup: newvp = %x\n", fvp); |
|
#endif |
|
return (0); |
|
} |
} |
|
|
int |
int |
kernfs_access(v) |
kernfs_access(void *v) |
void *v; |
|
{ |
{ |
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; |
kauth_cred_t a_cred; |
struct proc *a_p; |
|
} */ *ap = v; |
} */ *ap = v; |
struct vnode *vp = ap->a_vp; |
struct vattr va; |
mode_t fmode = |
int error; |
(vp->v_flag & VROOT) ? DIR_MODE : VTOKERN(vp)->kf_kt->kt_mode; |
|
|
if ((error = VOP_GETATTR(ap->a_vp, &va, ap->a_cred)) != 0) |
|
return (error); |
|
|
|
return kauth_authorize_vnode(ap->a_cred, |
|
KAUTH_ACCESS_ACTION(ap->a_mode, ap->a_vp->v_type, va.va_mode), |
|
ap->a_vp, NULL, genfs_can_access(va.va_type, va.va_mode, |
|
va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); |
|
} |
|
|
|
static int |
|
kernfs_default_fileop_getattr(void *v) |
|
{ |
|
struct vop_getattr_args /* { |
|
struct vnode *a_vp; |
|
struct vattr *a_vap; |
|
kauth_cred_t a_cred; |
|
} */ *ap = v; |
|
struct vattr *vap = ap->a_vap; |
|
|
|
vap->va_nlink = 1; |
|
vap->va_bytes = vap->va_size = 0; |
|
|
return (vaccess(fmode, (uid_t)0, (gid_t)0, ap->a_mode, ap->a_cred)); |
return 0; |
} |
} |
|
|
int |
int |
kernfs_getattr(v) |
kernfs_getattr(void *v) |
void *v; |
|
{ |
{ |
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; |
kauth_cred_t a_cred; |
struct proc *a_p; |
|
} */ *ap = v; |
} */ *ap = v; |
struct vnode *vp = ap->a_vp; |
struct kernfs_node *kfs = VTOKERN(ap->a_vp); |
|
struct kernfs_subdir *ks; |
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], *bf; |
|
size_t nread, total; |
|
|
bzero((caddr_t) vap, sizeof(*vap)); |
|
vattr_null(vap); |
vattr_null(vap); |
|
vap->va_type = ap->a_vp->v_type; |
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_mode = kfs->kfs_mode; |
|
vap->va_fileid = kfs->kfs_fileno; |
|
vap->va_flags = 0; |
vap->va_size = 0; |
vap->va_size = 0; |
vap->va_blocksize = DEV_BSIZE; |
vap->va_blocksize = DEV_BSIZE; |
microtime(&tv); |
/* Make all times be current TOD, except for the "boottime" node. */ |
TIMEVAL_TO_TIMESPEC(&tv, &vap->va_atime); |
if (kfs->kfs_kt->kt_namlen == 8 && |
vap->va_mtime = vap->va_atime; |
!memcmp(kfs->kfs_kt->kt_name, "boottime", 8)) { |
vap->va_ctime = vap->va_ctime; |
vap->va_ctime = boottime; |
|
} else { |
|
getnanotime(&vap->va_ctime); |
|
} |
|
vap->va_atime = vap->va_mtime = vap->va_ctime; |
vap->va_gen = 0; |
vap->va_gen = 0; |
vap->va_flags = 0; |
vap->va_flags = 0; |
vap->va_rdev = 0; |
vap->va_rdev = 0; |
vap->va_bytes = 0; |
vap->va_bytes = 0; |
|
|
if (vp->v_flag & VROOT) { |
switch (kfs->kfs_type) { |
#ifdef KERNFS_DIAGNOSTIC |
case KFSkern: |
kprintf("kernfs_getattr: stat rootdir\n"); |
vap->va_nlink = nkern_dirs; |
#endif |
vap->va_bytes = vap->va_size = DEV_BSIZE; |
vap->va_type = VDIR; |
break; |
vap->va_mode = DIR_MODE; |
|
vap->va_nlink = 2; |
case KFSdevice: |
vap->va_fileid = 2; |
vap->va_nlink = 1; |
vap->va_size = DEV_BSIZE; |
vap->va_rdev = ap->a_vp->v_rdev; |
} else { |
break; |
struct kern_target *kt = VTOKERN(vp)->kf_kt; |
|
int nbytes, total; |
case KFSroot: |
#ifdef KERNFS_DIAGNOSTIC |
vap->va_nlink = 1; |
kprintf("kernfs_getattr: stat target %s\n", kt->kt_name); |
vap->va_bytes = vap->va_size = DEV_BSIZE; |
#endif |
break; |
vap->va_type = kt->kt_vtype; |
|
vap->va_mode = kt->kt_mode; |
case KFSsubdir: |
|
ks = (struct kernfs_subdir *)kfs->kfs_kt->kt_data; |
|
vap->va_nlink = ks->ks_dirs; |
|
vap->va_bytes = vap->va_size = DEV_BSIZE; |
|
break; |
|
|
|
case KFSnull: |
|
case KFStime: |
|
case KFSint: |
|
case KFSstring: |
|
case KFShostname: |
|
case KFSavenrun: |
|
case KFSmsgbuf: |
vap->va_nlink = 1; |
vap->va_nlink = 1; |
vap->va_fileid = 3 + (kt - kern_targets); |
|
total = 0; |
total = 0; |
while (buf = strbuf, |
do { |
nbytes = kernfs_xread(kt, total, &buf, sizeof(strbuf))) |
bf = strbuf; |
total += nbytes; |
error = kernfs_xread(kfs, total, &bf, |
vap->va_size = total; |
sizeof(strbuf), &nread); |
|
total += nread; |
|
} while (error == 0 && nread != 0); |
|
vap->va_bytes = vap->va_size = total; |
|
break; |
|
|
|
default: |
|
error = kernfs_try_fileop(kfs->kfs_type, |
|
KERNFS_FILEOP_GETATTR, v, EINVAL); |
|
break; |
} |
} |
|
|
#ifdef KERNFS_DIAGNOSTIC |
|
kprintf("kernfs_getattr: return error %d\n", error); |
|
#endif |
|
return (error); |
return (error); |
} |
} |
|
|
/*ARGSUSED*/ |
/*ARGSUSED*/ |
int |
int |
kernfs_setattr(v) |
kernfs_setattr(void *v) |
void *v; |
|
{ |
{ |
|
|
/* |
/* |
* 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 487 kernfs_setattr(v) |
|
Line 709 kernfs_setattr(v) |
|
} |
} |
|
|
int |
int |
kernfs_read(v) |
kernfs_default_xread(void *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; |
kauth_cred_t a_cred; |
} */ *ap = v; |
} */ *ap = v; |
struct vnode *vp = ap->a_vp; |
|
struct uio *uio = ap->a_uio; |
struct uio *uio = ap->a_uio; |
struct kern_target *kt; |
struct kernfs_node *kfs = VTOKERN(ap->a_vp); |
char strbuf[KSTRING], *buf; |
char strbuf[KSTRING], *bf; |
int off, len; |
int off; |
|
size_t len; |
int error; |
int error; |
|
|
if (vp->v_type == VDIR) |
if (ap->a_vp->v_type == VDIR) |
return (EOPNOTSUPP); |
return EISDIR; |
|
|
kt = VTOKERN(vp)->kf_kt; |
off = (int)uio->uio_offset; |
|
/* Don't allow negative offsets */ |
|
if (off < 0) |
|
return EINVAL; |
|
|
|
bf = strbuf; |
|
if ((error = kernfs_xread(kfs, off, &bf, sizeof(strbuf), &len)) == 0) |
|
error = uiomove(bf, len, uio); |
|
return (error); |
|
} |
|
|
#ifdef KERNFS_DIAGNOSTIC |
int |
kprintf("kern_read %s\n", kt->kt_name); |
kernfs_read(void *v) |
#endif |
{ |
|
struct vop_read_args /* { |
|
struct vnode *a_vp; |
|
struct uio *a_uio; |
|
int a_ioflag; |
|
struct ucred *a_cred; |
|
} */ *ap = v; |
|
struct kernfs_node *kfs = VTOKERN(ap->a_vp); |
|
|
off = uio->uio_offset; |
if (kfs->kfs_type < KFSlasttype) { |
#if 0 |
/* use default function */ |
while (buf = strbuf, |
return kernfs_default_xread(v); |
#else |
|
if (buf = strbuf, |
|
#endif |
|
len = kernfs_xread(kt, off, &buf, sizeof(strbuf))) { |
|
if ((error = uiomove(buf, len, uio)) != 0) |
|
return (error); |
|
off += len; |
|
} |
} |
return (0); |
return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_READ, v, |
|
EOPNOTSUPP); |
} |
} |
|
|
int |
static int |
kernfs_write(v) |
kernfs_default_xwrite(void *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; |
kauth_cred_t a_cred; |
} */ *ap = v; |
} */ *ap = v; |
struct vnode *vp = ap->a_vp; |
struct kernfs_node *kfs = VTOKERN(ap->a_vp); |
struct uio *uio = ap->a_uio; |
struct uio *uio = ap->a_uio; |
struct kern_target *kt; |
int error; |
int error, xlen; |
size_t xlen; |
char strbuf[KSTRING]; |
char strbuf[KSTRING]; |
|
|
if (vp->v_type == VDIR) |
|
return (EOPNOTSUPP); |
|
|
|
kt = VTOKERN(vp)->kf_kt; |
|
|
|
if (uio->uio_offset != 0) |
if (uio->uio_offset != 0) |
return (EINVAL); |
return (EINVAL); |
|
|
|
|
|
|
strbuf[xlen] = '\0'; |
strbuf[xlen] = '\0'; |
xlen = strlen(strbuf); |
xlen = strlen(strbuf); |
return (kernfs_xwrite(kt, strbuf, xlen)); |
return (kernfs_xwrite(kfs, strbuf, xlen)); |
|
} |
|
|
|
int |
|
kernfs_write(void *v) |
|
{ |
|
struct vop_write_args /* { |
|
struct vnode *a_vp; |
|
struct uio *a_uio; |
|
int a_ioflag; |
|
kauth_cred_t a_cred; |
|
} */ *ap = v; |
|
struct kernfs_node *kfs = VTOKERN(ap->a_vp); |
|
|
|
if (kfs->kfs_type < KFSlasttype) { |
|
/* use default function */ |
|
return kernfs_default_xwrite(v); |
|
} |
|
return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_WRITE, v, |
|
EOPNOTSUPP); |
|
} |
|
|
|
int |
|
kernfs_ioctl(void *v) |
|
{ |
|
struct vop_ioctl_args /* { |
|
const struct vnodeop_desc *a_desc; |
|
struct vnode *a_vp; |
|
u_long a_command; |
|
void *a_data; |
|
int a_fflag; |
|
kauth_cred_t a_cred; |
|
} */ *ap = v; |
|
struct kernfs_node *kfs = VTOKERN(ap->a_vp); |
|
|
|
return kernfs_try_fileop(kfs->kfs_type, KERNFS_FILEOP_IOCTL, v, |
|
EPASSTHROUGH); |
|
} |
|
|
|
static int |
|
kernfs_setdirentfileno_kt(struct dirent *d, const struct kern_target *kt, |
|
struct vop_readdir_args *ap) |
|
{ |
|
struct kernfs_node *kfs; |
|
struct vnode *vp; |
|
int error; |
|
|
|
if ((error = vcache_get(ap->a_vp->v_mount, &kt, sizeof(kt), &vp)) != 0) |
|
return error; |
|
kfs = VTOKERN(vp); |
|
d->d_fileno = kfs->kfs_fileno; |
|
vrele(vp); |
|
return 0; |
|
} |
|
|
|
static int |
|
kernfs_setdirentfileno(struct dirent *d, off_t entry, |
|
struct kernfs_node *thisdir_kfs, const struct kern_target *parent_kt, |
|
const struct kern_target *kt, struct vop_readdir_args *ap) |
|
{ |
|
const struct kern_target *ikt; |
|
int error; |
|
|
|
switch (entry) { |
|
case 0: |
|
d->d_fileno = thisdir_kfs->kfs_fileno; |
|
return 0; |
|
case 1: |
|
ikt = parent_kt; |
|
break; |
|
default: |
|
ikt = kt; |
|
break; |
|
} |
|
if (ikt != thisdir_kfs->kfs_kt) { |
|
if ((error = kernfs_setdirentfileno_kt(d, ikt, ap)) != 0) |
|
return error; |
|
} else |
|
d->d_fileno = thisdir_kfs->kfs_fileno; |
|
return 0; |
} |
} |
|
|
int |
int |
kernfs_readdir(v) |
kernfs_readdir(void *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; |
kauth_cred_t a_cred; |
int *a_eofflag; |
int *a_eofflag; |
u_long *a_cookies; |
off_t **a_cookies; |
int a_ncookies; |
int a_*ncookies; |
} */ *ap = v; |
} */ *ap = v; |
struct uio *uio = ap->a_uio; |
struct uio *uio = ap->a_uio; |
struct dirent d; |
struct dirent d; |
struct kern_target *kt; |
struct kernfs_node *kfs = VTOKERN(ap->a_vp); |
int i; |
const struct kern_target *kt; |
|
const struct dyn_kern_target *dkt = NULL; |
|
const struct kernfs_subdir *ks; |
|
off_t i, j; |
int error; |
int error; |
u_long *cookies = ap->a_cookies; |
off_t *cookies = NULL; |
int ncookies = ap->a_ncookies; |
int ncookies = 0, n; |
|
|
if (ap->a_vp->v_type != VDIR) |
|
return (ENOTDIR); |
|
|
|
if (uio->uio_resid < UIO_MX) |
if (uio->uio_resid < UIO_MX) |
return (EINVAL); |
return (EINVAL); |
Line 592 kernfs_readdir(v) |
|
Line 895 kernfs_readdir(v) |
|
|
|
error = 0; |
error = 0; |
i = uio->uio_offset; |
i = uio->uio_offset; |
bzero((caddr_t)&d, UIO_MX); |
memset(&d, 0, sizeof(d)); |
d.d_reclen = UIO_MX; |
d.d_reclen = UIO_MX; |
|
ncookies = uio->uio_resid / UIO_MX; |
|
|
for (kt = &kern_targets[i]; |
switch (kfs->kfs_type) { |
uio->uio_resid >= UIO_MX && i < nkern_targets; kt++, i++) { |
case KFSkern: |
#ifdef KERNFS_DIAGNOSTIC |
if (i >= nkern_targets) |
kprintf("kernfs_readdir: i = %d\n", i); |
return (0); |
#endif |
|
|
if (ap->a_ncookies) { |
|
ncookies = min(ncookies, (nkern_targets - i)); |
|
cookies = malloc(ncookies * sizeof(off_t), M_TEMP, |
|
M_WAITOK); |
|
*ap->a_cookies = cookies; |
|
} |
|
|
|
n = 0; |
|
for (; i < nkern_targets && uio->uio_resid >= UIO_MX; i++) { |
|
if (i < static_nkern_targets) |
|
kt = &kern_targets[i]; |
|
else { |
|
if (dkt == NULL) { |
|
dkt = SIMPLEQ_FIRST(&dyn_kern_targets); |
|
for (j = static_nkern_targets; j < i && |
|
dkt != NULL; j++) |
|
dkt = SIMPLEQ_NEXT(dkt, dkt_queue); |
|
if (j != i) |
|
break; |
|
} else { |
|
dkt = SIMPLEQ_NEXT(dkt, dkt_queue); |
|
} |
|
if (dkt == NULL) |
|
break; |
|
kt = &dkt->dkt_kt; |
|
} |
|
if (kt->kt_tag == KFSdevice) { |
|
dev_t *dp = kt->kt_data; |
|
struct vnode *fvp; |
|
|
|
if (*dp == NODEV || |
|
!vfinddev(*dp, kt->kt_vtype, &fvp)) |
|
continue; |
|
vrele(fvp); |
|
} |
|
if (kt->kt_tag == KFSmsgbuf) { |
|
if (!msgbufenabled |
|
|| msgbufp->msg_magic != MSG_MAGIC) { |
|
continue; |
|
} |
|
} |
|
d.d_namlen = kt->kt_namlen; |
|
if ((error = kernfs_setdirentfileno(&d, i, kfs, |
|
&kern_targets[0], kt, ap)) != 0) |
|
break; |
|
memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1); |
|
d.d_type = kt->kt_type; |
|
if ((error = uiomove(&d, UIO_MX, uio)) != 0) |
|
break; |
|
if (cookies) |
|
*cookies++ = i + 1; |
|
n++; |
|
} |
|
ncookies = n; |
|
break; |
|
|
|
case KFSroot: |
|
if (i >= 2) |
|
return 0; |
|
|
|
if (ap->a_ncookies) { |
|
ncookies = min(ncookies, (2 - i)); |
|
cookies = malloc(ncookies * sizeof(off_t), M_TEMP, |
|
M_WAITOK); |
|
*ap->a_cookies = cookies; |
|
} |
|
|
|
n = 0; |
|
for (; i < 2 && uio->uio_resid >= UIO_MX; i++) { |
|
kt = &kern_targets[i]; |
|
d.d_namlen = kt->kt_namlen; |
|
d.d_fileno = KERNFS_FILENO(kt, kt->kt_tag, 0); |
|
memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1); |
|
d.d_type = kt->kt_type; |
|
if ((error = uiomove(&d, UIO_MX, uio)) != 0) |
|
break; |
|
if (cookies) |
|
*cookies++ = i + 1; |
|
n++; |
|
} |
|
ncookies = n; |
|
break; |
|
|
|
case KFSsubdir: |
|
ks = (struct kernfs_subdir *)kfs->kfs_kt->kt_data; |
|
if (i >= ks->ks_nentries) |
|
return (0); |
|
|
|
if (ap->a_ncookies) { |
|
ncookies = min(ncookies, (ks->ks_nentries - i)); |
|
cookies = malloc(ncookies * sizeof(off_t), M_TEMP, |
|
M_WAITOK); |
|
*ap->a_cookies = cookies; |
|
} |
|
|
|
dkt = SIMPLEQ_FIRST(&ks->ks_entries); |
|
for (j = 0; j < i && dkt != NULL; j++) |
|
dkt = SIMPLEQ_NEXT(dkt, dkt_queue); |
|
n = 0; |
|
for (; i < ks->ks_nentries && uio->uio_resid >= UIO_MX; i++) { |
|
if (i < 2) |
|
kt = &subdir_targets[i]; |
|
else { |
|
/* check if ks_nentries lied to us */ |
|
if (dkt == NULL) |
|
break; |
|
kt = &dkt->dkt_kt; |
|
dkt = SIMPLEQ_NEXT(dkt, dkt_queue); |
|
} |
|
if (kt->kt_tag == KFSdevice) { |
|
dev_t *dp = kt->kt_data; |
|
struct vnode *fvp; |
|
|
|
if (*dp == NODEV || |
|
!vfinddev(*dp, kt->kt_vtype, &fvp)) |
|
continue; |
|
vrele(fvp); |
|
} |
|
d.d_namlen = kt->kt_namlen; |
|
if ((error = kernfs_setdirentfileno(&d, i, kfs, |
|
ks->ks_parent, kt, ap)) != 0) |
|
break; |
|
memcpy(d.d_name, kt->kt_name, kt->kt_namlen + 1); |
|
d.d_type = kt->kt_type; |
|
if ((error = uiomove(&d, UIO_MX, uio)) != 0) |
|
break; |
|
if (cookies) |
|
*cookies++ = i + 1; |
|
n++; |
|
} |
|
ncookies = n; |
|
break; |
|
|
|
default: |
|
error = ENOTDIR; |
|
break; |
|
} |
|
|
if (kt->kt_tag == KTT_DEVICE) { |
if (ap->a_ncookies) { |
dev_t *dp = kt->kt_data; |
if (error) { |
struct vnode *fvp; |
if (cookies) |
|
free(*ap->a_cookies, M_TEMP); |
if (*dp == NODEV || !vfinddev(*dp, kt->kt_vtype, &fvp)) |
*ap->a_ncookies = 0; |
continue; |
*ap->a_cookies = NULL; |
} |
} else |
|
*ap->a_ncookies = ncookies; |
d.d_fileno = i + 3; |
|
d.d_namlen = kt->kt_namlen; |
|
bcopy(kt->kt_name, d.d_name, kt->kt_namlen + 1); |
|
d.d_type = kt->kt_type; |
|
|
|
if ((error = uiomove((caddr_t)&d, UIO_MX, uio)) != 0) |
|
break; |
|
if (ncookies-- > 0) |
|
*cookies++ = i + 1; |
|
} |
} |
|
|
uio->uio_offset = i; |
uio->uio_offset = i; |
Line 625 kernfs_readdir(v) |
|
Line 1057 kernfs_readdir(v) |
|
} |
} |
|
|
int |
int |
kernfs_inactive(v) |
kernfs_inactive(void *v) |
void *v; |
|
{ |
{ |
struct vop_inactive_args /* { |
struct vop_inactive_args /* { |
struct vnode *a_vp; |
struct vnode *a_vp; |
|
bool *a_recycle; |
} */ *ap = v; |
} */ *ap = v; |
struct vnode *vp = ap->a_vp; |
struct vnode *vp = ap->a_vp; |
|
|
#ifdef KERNFS_DIAGNOSTIC |
*ap->a_recycle = false; |
kprintf("kernfs_inactive(%x)\n", vp); |
VOP_UNLOCK(vp); |
#endif |
|
/* |
|
* Clear out the v_type field to avoid |
|
* nasty things happening in vgone(). |
|
*/ |
|
vp->v_type = VNON; |
|
return (0); |
return (0); |
} |
} |
|
|
int |
int |
kernfs_reclaim(v) |
kernfs_reclaim(void *v) |
void *v; |
|
{ |
{ |
struct vop_reclaim_args /* { |
struct vop_reclaim_args /* { |
struct vnode *a_vp; |
struct vnode *a_vp; |
} */ *ap = v; |
} */ *ap = v; |
struct vnode *vp = ap->a_vp; |
struct vnode *vp = ap->a_vp; |
|
struct kernfs_node *kfs = VTOKERN(vp); |
|
|
#ifdef KERNFS_DIAGNOSTIC |
vp->v_data = NULL; |
kprintf("kernfs_reclaim(%x)\n", vp); |
vcache_remove(vp->v_mount, &kfs->kfs_kt, sizeof(kfs->kfs_kt)); |
#endif |
mutex_enter(&kfs_lock); |
if (vp->v_data) { |
TAILQ_REMOVE(&VFSTOKERNFS(vp->v_mount)->nodelist, kfs, kfs_list); |
FREE(vp->v_data, M_TEMP); |
mutex_exit(&kfs_lock); |
vp->v_data = 0; |
kmem_free(kfs, sizeof(struct kernfs_node)); |
} |
|
return (0); |
return 0; |
} |
} |
|
|
/* |
/* |
* Return POSIX pathconf information applicable to special devices. |
* Return POSIX pathconf information applicable to special devices. |
*/ |
*/ |
int |
int |
kernfs_pathconf(v) |
kernfs_pathconf(void *v) |
void *v; |
|
{ |
{ |
struct vop_pathconf_args /* { |
struct vop_pathconf_args /* { |
struct vnode *a_vp; |
struct vnode *a_vp; |
Line 695 kernfs_pathconf(v) |
|
Line 1120 kernfs_pathconf(v) |
|
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 706 kernfs_pathconf(v) |
|
Line 1134 kernfs_pathconf(v) |
|
*/ |
*/ |
/* ARGSUSED */ |
/* ARGSUSED */ |
int |
int |
kernfs_print(v) |
kernfs_print(void *v) |
void *v; |
|
{ |
{ |
|
|
kprintf("tag VT_KERNFS, kernfs vnode\n"); |
printf("tag VT_KERNFS, kernfs vnode\n"); |
return (0); |
return (0); |
} |
} |
|
|
int |
int |
kernfs_link(v) |
kernfs_link(void *v) |
void *v; |
|
{ |
{ |
struct vop_link_args /* { |
struct vop_link_args /* { |
struct vnode *a_dvp; |
struct vnode *a_dvp; |
struct vnode *a_vp; |
struct vnode *a_vp; |
struct componentname *a_cnp; |
struct componentname *a_cnp; |
} */ *ap = v; |
} */ *ap = v; |
|
|
VOP_ABORTOP(ap->a_dvp, ap->a_cnp); |
VOP_ABORTOP(ap->a_dvp, ap->a_cnp); |
vput(ap->a_dvp); |
vput(ap->a_dvp); |
return (EROFS); |
return (EROFS); |
} |
} |
|
|
int |
int |
kernfs_symlink(v) |
kernfs_symlink(void *v) |
void *v; |
|
{ |
{ |
struct vop_symlink_args /* { |
struct vop_symlink_v3_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; |
struct vattr *a_vap; |
struct vattr *a_vap; |
char *a_target; |
char *a_target; |
} */ *ap = v; |
} */ *ap = v; |
|
|
VOP_ABORTOP(ap->a_dvp, ap->a_cnp); |
VOP_ABORTOP(ap->a_dvp, ap->a_cnp); |
vput(ap->a_dvp); |
|
return (EROFS); |
return (EROFS); |
} |
} |