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cddl/usr.sbin/dwatch/libexec/vop_rename

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# -*- tab-width: 4 -*- ;; Emacs
# vi: set filetype=sh tabstop=8 shiftwidth=8 noexpandtab :: Vi/ViM
############################################################ IDENT(1)
#
# $Title: dwatch(8) module for VOP_RENAME(9) [or similar] entry $
# $Copyright: 2014-2017 Devin Teske. All rights reserved. $
# $FreeBSD$
#
############################################################ DESCRIPTION
#
# Print filesystem paths being renamed by VOP_RENAME(9) [or similar]
# NB: All paths are shown even if error prevents their rename.
#
############################################################ PROBE
: ${PROBE:="vfs:vop:$PROFILE:entry"}
############################################################ ACTIONS
exec 9<<EOF
$PROBE /* probe ID 1 */
{${TRACE:+
printf("<1>");}
this->fvp = args[1] ? args[1]->a_fdvp : NULL;
this->fncp = this->fvp != NULL ?
this->fvp->v_cache_dst.tqh_first : 0;
this->ffi_name = args[1] ? (
args[1]->a_fcnp != NULL ?
stringof(args[1]->a_fcnp->cn_nameptr) : ""
) : "";
this->fmount = this->fvp != NULL ?
this->fvp->v_mount : NULL; /* ptr to vfs we are in */
this->ffi_fs = this->fmount != NULL ?
stringof(this->fmount->mnt_stat.f_fstypename) : "";
this->ffi_mount = this->fmount != NULL ?
stringof(this->fmount->mnt_stat.f_mntonname) : "";
this->fd_name = args[0]->v_cache_dd != NULL ?
stringof(args[0]->v_cache_dd->nc_name) : "";
this->tvp = args[1] ? args[1]->a_tdvp : NULL;
this->tncp = this->tvp != NULL ?
this->tvp->v_cache_dst.tqh_first : 0;
this->tfi_name = args[1] ? (
args[1]->a_tcnp != NULL ?
stringof(args[1]->a_tcnp->cn_nameptr) : ""
) : "";
this->tmount = this->tvp != NULL ?
this->tvp->v_mount : NULL; /* ptr to vfs we are in */
this->tfi_fs = this->tmount != NULL ?
stringof(this->tmount->mnt_stat.f_fstypename) : "";
this->tfi_mount = this->tmount != NULL ?
stringof(this->tmount->mnt_stat.f_mntonname) : "";
this->td_name = this->tvp != NULL ? (
this->tvp->v_cache_dd != NULL ?
stringof(this->tvp->v_cache_dd->nc_name) : ""
) : "";
$( awk -v MAX_DEPTH=$MAX_DEPTH '
buf = buf $0 "\n" { }
END {
for (DEPTH = 1; DEPTH <= MAX_DEPTH + 1; DEPTH++) {
$0 = buf
gsub(/DEPTH/, DEPTH)
sub(/\n$/, "")
print
}
}
' <<EOFDEPTH
this->fnameDEPTH = this->tnameDEPTH = "";
EOFDEPTH
)
}
$PROBE /this->fvp == 0 || this->ffi_fs == 0 ||
this->ffi_fs == "devfs" || this->ffi_fs == "" ||
this->ffi_name == ""/ /* probe ID 2 */
{${TRACE:+
printf("<2>");}
this->fncp = 0;
}
$PROBE /this->tvp == 0 || this->tfi_fs == 0 ||
this->tfi_fs == "devfs" || this->tfi_fs == "" ||
this->tfi_name == ""/ /* probe ID 3 */
{${TRACE:+
printf("<3>");}
this->tncp = 0;
}
/*********************************************************/
$PROBE /this->fncp/ /* probe ID 4 (depth 1) */
{${TRACE:+
printf("<4>");}
this->fdvp = this->fncp->nc_dvp != NULL ?
this->fncp->nc_dvp->v_cache_dst.tqh_first : 0;
this->fname1 = this->fdvp != 0 ? (
this->fdvp->nc_name != 0 ? stringof(this->fdvp->nc_name) : ""
) : "";
}
$PROBE /this->tncp/ /* probe ID 5 (depth 1) */
{${TRACE:+
printf("<5>");}
this->tdvp = this->tncp->nc_dvp != NULL ?
this->tncp->nc_dvp->v_cache_dst.tqh_first : 0;
this->tname1 = this->tdvp != 0 ? (
this->tdvp->nc_name != 0 ? stringof(this->tdvp->nc_name) : ""
) : "";
}
$PROBE /this->fname1 == 0 || this->ffi_fs == 0 ||
this->ffi_fs == "devfs" || this->ffi_fs == "" ||
this->fname1 == "/" || this->fname1 == ""/ /* probe ID 6 */
{${TRACE:+
printf("<6>");}
this->fdvp = 0;
}
$PROBE /this->tname1 == 0 || this->tfi_fs == 0 ||
this->tfi_fs == "devfs" || this->tfi_fs == "" ||
this->tname1 == "/" || this->tname1 == ""/ /* probe ID 7 */
{${TRACE:+
printf("<7>");}
this->tdvp = 0;
}
/*********************************************************/
/*
* BEGIN Pathname-depth iterators
*/
$( awk -v ID=8 -v MAX_DEPTH=$MAX_DEPTH '
buf = buf $0 "\n" { }
END {
for (DEPTH = 2; DEPTH <= MAX_DEPTH; DEPTH++) {
$0 = buf
gsub(/DEPTH/, DEPTH)
gsub(/IDNUM1/, ID)
gsub(/IDNUM2/, ID + 1)
sub(/\n$/, "")
print
ID = ID + 2
}
}
' <<EOFDEPTH
$PROBE /this->fdvp/ /* probe ID IDNUM1 (depth DEPTH) */
{${TRACE:+
printf("<IDNUM1>");}
this->fdvp = this->fdvp->nc_dvp != NULL ?
this->fdvp->nc_dvp->v_cache_dst.tqh_first : 0;
this->fnameDEPTH = this->fdvp != 0 ? (
this->fdvp->nc_name != 0 ? stringof(this->fdvp->nc_name) : ""
) : "";
}
$PROBE /this->tdvp/ /* probe ID IDNUM2 (depth DEPTH) */
{${TRACE:+
printf("<IDNUM2>");}
this->tdvp = this->tdvp->nc_dvp != NULL ?
this->tdvp->nc_dvp->v_cache_dst.tqh_first : 0;
this->tnameDEPTH = this->tdvp != 0 ? (
this->tdvp->nc_name != 0 ? stringof(this->tdvp->nc_name) : ""
) : "";
}
EOFDEPTH
)
$PROBE /this->fdvp/ /* probe ID $(( $MAX_DEPTH * 2 + 6 )) */
{${TRACE:+
printf("<$(( $MAX_DEPTH * 2 + 6 ))>");}
this->fdvp = this->fdvp->nc_dvp != NULL ?
this->fdvp->nc_dvp->v_cache_dst.tqh_first : 0;
this->fname$(( $MAX_DEPTH + 1 )) = this->fdvp != 0 ? (
this->fdvp->nc_dvp != NULL ? "..." : ""
) : "";
}
$PROBE /this->tdvp/ /* probe ID $(( $MAX_DEPTH * 2 + 7 )) */
{${TRACE:+
printf("<$(( $MAX_DEPTH * 2 + 7 ))>");}
this->tdvp = this->tdvp->nc_dvp != NULL ?
this->tdvp->nc_dvp->v_cache_dst.tqh_first : 0;
this->tname$(( $MAX_DEPTH + 1 )) = this->tdvp != 0 ? (
this->tdvp->nc_dvp != NULL ? "..." : ""
) : "";
}
/*
* END Pathname-depth iterators
*/
EOF
ACTIONS=$( cat <&9 )
ID=$(( $MAX_DEPTH * 2 + 8 ))
############################################################ EVENT ACTION
EVENT_TEST="this->ffi_mount != 0 && this->tfi_mount != 0"
############################################################ EVENT DETAILS
exec 9<<EOF
/*
* Print 'from' full path
* NB: Up-to but not including the parent directory (printed below)
*/
printf("%s%s", this->ffi_mount, this->ffi_mount != 0 ? (
this->ffi_mount == "/" ? "" : "/"
) : "/");
$( awk -v MAX_DEPTH=$MAX_DEPTH '
buf = buf $0 "\n" { }
END {
for (N = MAX_DEPTH + 1; N > 0; N--) {
$0 = (N <= MAX_DEPTH ? "\t" : "") buf
gsub(/N/, N)
sub(/\n$/, "")
print
}
}
' <<-EOFDEPTH
printf("%s%s", this->fname = this->fnameN, this->fname != "" ? "/" : "");
EOFDEPTH
)
/* Print the 'from' parent directory name */
this->fname = this->fd_name != 0 ? this->fd_name : "";
printf("%s%s", this->fname, this->fname != "" ? "/" : "");
/* Print the 'from' entry name */
this->fname = this->ffi_name != 0 ? this->ffi_name : "";
printf("%s", this->fname);
printf(" -> ");
/*
* Print 'to' full path
* NB: Up-to but not including the parent directory (printed below)
*/
printf("%s%s", this->tfi_mount, this->tfi_mount != 0 ? (
this->tfi_mount == "/" ? "" : "/"
) : "/");
$( awk -v MAX_DEPTH=$MAX_DEPTH '
buf = buf $0 "\n" { }
END {
for (N = MAX_DEPTH + 1; N > 0; N--) {
$0 = (N <= MAX_DEPTH ? "\t" : "") buf
gsub(/N/, N)
sub(/\n$/, "")
print
}
}
' <<-EOFDEPTH
printf("%s%s", this->tname = this->tnameN, this->tname != "" ? "/" : "");
EOFDEPTH
)
/* Print the 'to' parent directory name */
this->tname = this->td_name != 0 ? this->td_name : "";
printf("%s%s", this->tname, this->tname != "" ? "/" : "");
/* Print the 'to' entry name */
this->tname = this->tfi_name != 0 ? this->tfi_name : "";
printf("%s", this->tname);
EOF
EVENT_DETAILS=$( cat <&9 )
################################################################################
# END
################################################################################