diff options
Diffstat (limited to 'share/man/man9/vnode.9')
| -rw-r--r-- | share/man/man9/vnode.9 | 26 |
1 files changed, 12 insertions, 14 deletions
diff --git a/share/man/man9/vnode.9 b/share/man/man9/vnode.9 index dc163f2..023e6f3 100644 --- a/share/man/man9/vnode.9 +++ b/share/man/man9/vnode.9 @@ -45,18 +45,6 @@ enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD }; /* - * Vnode tag types. - * These are for the benefit of external programs only (e.g., pstat) - * and should NEVER be inspected by the kernel. - */ -enum vtagtype { - VT_NON, VT_UFS, VT_NFS, VT_UNUSED, VT_PC, VT_LFS, VT_LOFS, VT_FDESC, - VT_PORTAL, VT_NULL, VT_UMAP, VT_KERNFS, VT_PROCFS, VT_AFS, VT_ISOFS, - VT_UNION, VT_MSDOSFS, VT_DEVFS, VT_TFS, VT_VFS, VT_CODA, VT_NTFS, - VT_HPFS, VT_NWFS, VT_PSEUDOFS -}; - -/* * Each underlying file system allocates its own private area and hangs * it from v_data. If non-null, this area is freed in getnewvnode(). */ @@ -105,7 +93,7 @@ struct vnode { struct vm_object *v_object; /* Place to store VM object */ struct simplelock v_interlock; /* lock on usecount and flag */ struct lock *v_vnlock; /* used for non-locking fs's */ - enum vtagtype v_tag; /* type of underlying data */ + const char *v_tag; /* type of underlying data */ void *v_data; /* private data for fs */ LIST_HEAD(, namecache) v_cache_src; /* Cache entries from us */ TAILQ_HEAD(, namecache) v_cache_dst; /* Cache entries to us */ @@ -241,7 +229,7 @@ A FIFO (named pipe). Advisory locking won't work on this. .It Dv VBAD An old style bad sector map .El -.Sh NOTES +.Sh IMPLEMENTATION NOTES VFIFO uses the "struct fileops" from .Pa /sys/kern/sys_pipe.c . VSOCK uses the "struct fileops" from @@ -252,7 +240,17 @@ Everything else uses the one from The VFIFO/VSOCK code, which is why "struct fileops" is used at all, is an artifact of an incomplete integration of the VFS code into the kernel. +.Pp +Calls to +.Xr malloc 9 +or +.Xr free 9 +when holding a +.Nm +interlock, will cause a LOR (Lock Order Reversal) due to the +interwining of VM Objects and Vnodes. .Sh SEE ALSO +.Xr malloc 9 .Xr VFS 9 .Sh AUTHORS This man page was written by |
