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Index: sbin/mount/mount.c
===================================================================
--- sbin/mount/mount.c
+++ sbin/mount/mount.c
@@ -42,6 +42,7 @@
__FBSDID("$FreeBSD$");
#include <sys/param.h>
+#define _WANT_MNTOPTS
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/wait.h>
@@ -96,32 +97,7 @@
uint64_t o_opt;
const char *o_name;
} optnames[] = {
- { MNT_ASYNC, "asynchronous" },
- { MNT_EXPORTED, "NFS exported" },
- { MNT_LOCAL, "local" },
- { MNT_NOATIME, "noatime" },
- { MNT_NOEXEC, "noexec" },
- { MNT_NOSUID, "nosuid" },
- { MNT_NOSYMFOLLOW, "nosymfollow" },
- { MNT_QUOTA, "with quotas" },
- { MNT_RDONLY, "read-only" },
- { MNT_SYNCHRONOUS, "synchronous" },
- { MNT_UNION, "union" },
- { MNT_NOCLUSTERR, "noclusterr" },
- { MNT_NOCLUSTERW, "noclusterw" },
- { MNT_SUIDDIR, "suiddir" },
- { MNT_SOFTDEP, "soft-updates" },
- { MNT_SUJ, "journaled soft-updates" },
- { MNT_MULTILABEL, "multilabel" },
- { MNT_ACLS, "acls" },
- { MNT_NFS4ACLS, "nfsv4acls" },
- { MNT_GJOURNAL, "gjournal" },
- { MNT_AUTOMOUNTED, "automounted" },
- { MNT_VERIFIED, "verified" },
- { MNT_UNTRUSTED, "untrusted" },
- { MNT_NOCOVER, "nocover" },
- { MNT_EMPTYDIR, "emptydir" },
- { 0, NULL }
+MNTOPT_NAMES
};
/*
@@ -664,7 +640,7 @@
{
uint64_t flags;
unsigned int i;
- struct opt *o;
+ struct mntoptnames *o;
struct passwd *pw;
(void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname,
Index: sys/kern/subr_bus.c
===================================================================
--- sys/kern/subr_bus.c
+++ sys/kern/subr_bus.c
@@ -43,6 +43,7 @@
#include <sys/limits.h>
#include <sys/malloc.h>
#include <sys/module.h>
+#include <sys/mount.h>
#include <sys/mutex.h>
#include <sys/poll.h>
#include <sys/priv.h>
Index: sys/kern/vfs_mount.c
===================================================================
--- sys/kern/vfs_mount.c
+++ sys/kern/vfs_mount.c
@@ -42,6 +42,7 @@
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/smp.h>
+#include <sys/bus.h>
#include <sys/eventhandler.h>
#include <sys/fcntl.h>
#include <sys/jail.h>
@@ -101,6 +102,8 @@
EVENTHANDLER_LIST_DEFINE(vfs_mounted);
EVENTHANDLER_LIST_DEFINE(vfs_unmounted);
+static void dev_vfs_event(const char *type, struct mount *mp, bool donew);
+
/*
* Global opts, taken by all filesystems
*/
@@ -1020,6 +1023,7 @@
VOP_UNLOCK(vp);
EVENTHANDLER_DIRECT_INVOKE(vfs_mounted, mp, newdp, td);
VOP_UNLOCK(newdp);
+ dev_vfs_event("MOUNT", mp, false);
mountcheckdirs(vp, newdp);
vn_seqc_write_end(vp);
vn_seqc_write_end(newdp);
@@ -1221,6 +1225,7 @@
if (error != 0)
goto end;
+ dev_vfs_event("REMOUNT", mp, true);
if (mp->mnt_opt != NULL)
vfs_freeopts(mp->mnt_opt);
mp->mnt_opt = mp->mnt_optnew;
@@ -1836,6 +1841,7 @@
TAILQ_REMOVE(&mountlist, mp, mnt_list);
mtx_unlock(&mountlist_mtx);
EVENTHANDLER_DIRECT_INVOKE(vfs_unmounted, mp, td);
+ dev_vfs_event("UNMOUNT", mp, false);
if (coveredvp != NULL) {
coveredvp->v_mountedhere = NULL;
vn_seqc_write_end(coveredvp);
@@ -2423,3 +2429,71 @@
error = kernel_mount(ma, flags);
return (error);
}
+
+/* Map from mount options to printable formats. */
+static struct mntoptnames optnames[] = {
+ MNTOPT_NAMES
+};
+
+static void
+dev_vfs_event_mntopt(struct sbuf *sb, const char *what, struct vfsoptlist *opts)
+{
+ struct vfsopt *opt;
+
+ if (opts == NULL || TAILQ_EMPTY(opts))
+ return;
+ sbuf_printf(sb, " %s=\"", what);
+ TAILQ_FOREACH(opt, opts, link) {
+ if (opt->name[0] == '\0' || (opt->len > 0 && *(char *)opt->value == '\0'))
+ continue;
+ devctl_safe_quote_sb(sb, opt->name);
+ if (opt->len > 0) {
+ sbuf_putc(sb, '=');
+ devctl_safe_quote_sb(sb, opt->value);
+ }
+ sbuf_putc(sb, ';');
+ }
+ sbuf_putc(sb, '"');
+}
+
+#define DEVCTL_LEN 1024
+static void
+dev_vfs_event(const char *type, struct mount *mp, bool donew)
+{
+ const uint8_t *cp;
+ struct mntoptnames *fp;
+ struct sbuf sb;
+ struct statfs *sfp = &mp->mnt_stat;
+ char *buf;
+
+ buf = malloc(DEVCTL_LEN, M_MOUNT, M_WAITOK);
+ if (buf == NULL)
+ return;
+ sbuf_new(&sb, buf, DEVCTL_LEN, SBUF_FIXEDLEN);
+ sbuf_cpy(&sb, "mount-point=\"");
+ devctl_safe_quote_sb(&sb, sfp->f_mntonname);
+ sbuf_cat(&sb, "\" mount-dev=\"");
+ devctl_safe_quote_sb(&sb, sfp->f_mntfromname);
+ sbuf_cat(&sb, "\" mount-type=\"");
+ devctl_safe_quote_sb(&sb, sfp->f_fstypename);
+ sbuf_cat(&sb, "\" fsid=0x");
+ cp = (const uint8_t *)&sfp->f_fsid.val[0];
+ for (int i = 0; i < sizeof(sfp->f_fsid); i++)
+ sbuf_printf(&sb, "%02x", cp[i]);
+ sbuf_printf(&sb, " owner=%u flags=\"", sfp->f_owner);
+ for (fp = optnames; fp->o_opt != 0; fp++) {
+ if ((mp->mnt_flag & fp->o_opt) != 0) {
+ sbuf_cat(&sb, fp->o_name);
+ sbuf_putc(&sb, ';');
+ }
+ }
+ sbuf_putc(&sb, '"');
+ dev_vfs_event_mntopt(&sb, "opt", mp->mnt_opt);
+ if (donew)
+ dev_vfs_event_mntopt(&sb, "optnew", mp->mnt_optnew);
+ sbuf_finish(&sb);
+
+ devctl_notify("VFS", "FS", type, sbuf_data(&sb));
+ sbuf_delete(&sb);
+ free(buf, M_MOUNT);
+}
Index: sys/sys/mount.h
===================================================================
--- sys/sys/mount.h
+++ sys/sys/mount.h
@@ -294,6 +294,45 @@
#endif /* _KERNEL */
+#if defined(_WANT_MNTOPTS) || defined(_KERNEL)
+struct mntoptnames {
+ uint64_t o_opt;
+ const char *o_name;
+};
+#define MNTOPT_NAMES \
+ { MNT_ASYNC, "asynchronous" }, \
+ { MNT_EXPORTED, "NFS exported" }, \
+ { MNT_LOCAL, "local" }, \
+ { MNT_NOATIME, "noatime" }, \
+ { MNT_NOEXEC, "noexec" }, \
+ { MNT_NOSUID, "nosuid" }, \
+ { MNT_NOSYMFOLLOW, "nosymfollow" }, \
+ { MNT_QUOTA, "with quotas" }, \
+ { MNT_RDONLY, "read-only" }, \
+ { MNT_SYNCHRONOUS, "synchronous" }, \
+ { MNT_UNION, "union" }, \
+ { MNT_NOCLUSTERR, "noclusterr" }, \
+ { MNT_NOCLUSTERW, "noclusterw" }, \
+ { MNT_SUIDDIR, "suiddir" }, \
+ { MNT_SOFTDEP, "soft-updates" }, \
+ { MNT_SUJ, "journaled soft-updates" }, \
+ { MNT_MULTILABEL, "multilabel" }, \
+ { MNT_ACLS, "acls" }, \
+ { MNT_NFS4ACLS, "nfsv4acls" }, \
+ { MNT_GJOURNAL, "gjournal" }, \
+ { MNT_AUTOMOUNTED, "automounted" }, \
+ { MNT_VERIFIED, "verified" }, \
+ { MNT_UNTRUSTED, "untrusted" }, \
+ { MNT_NOCOVER, "nocover" }, \
+ { MNT_EMPTYDIR, "emptydir" }, \
+ { MNT_UPDATE, "update" }, \
+ { MNT_DELEXPORT, "delexport" }, \
+ { MNT_RELOAD, "reload" }, \
+ { MNT_FORCE, "force" }, \
+ { MNT_SNAPSHOT, "snapshot" }, \
+ { 0, NULL }
+#endif
+
/*
* User specifiable flags, stored in mnt_flag.
*/

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