Commit the 64-bit inode project.

Extend the ino_t, dev_t, nlink_t types to 64-bit ints.  Modify
struct dirent layout to add d_off, increase the size of d_fileno
to 64-bits, increase the size of d_namlen to 16-bits, and change
the required alignment.  Increase struct statfs f_mntfromname[] and
f_mntonname[] array length MNAMELEN to 1024.

ABI breakage is mitigated by providing compatibility using versioned
symbols, ingenious use of the existing padding in structures, and
by employing other tricks.  Unfortunately, not everything can be
fixed, especially outside the base system.  For instance, third-party
APIs which pass struct stat around are broken in backward and
forward incompatible ways.

Kinfo sysctl MIBs ABI is changed in backward-compatible way, but
there is no general mechanism to handle other sysctl MIBS which
return structures where the layout has changed. It was considered
that the breakage is either in the management interfaces, where we
usually allow ABI slip, or is not important.

Struct xvnode changed layout, no compat shims are provided.

For struct xtty, dev_t tty device member was reduced to uint32_t.
It was decided that keeping ABI compat in this case is more useful
than reporting 64-bit dev_t, for the sake of pstat.

Update note: strictly follow the instructions in UPDATING.  Build
and install the new kernel with COMPAT_FREEBSD11 option enabled,
then reboot, and only then install new world.

Credits: The 64-bit inode project, also known as ino64, started life
many years ago as a project by Gleb Kurtsou (gleb).  Kirk McKusick
(mckusick) then picked up and updated the patch, and acted as a
flag-waver.  Feedback, suggestions, and discussions were carried
by Ed Maste (emaste), John Baldwin (jhb), Jilles Tjoelker (jilles),
and Rick Macklem (rmacklem).  Kris Moore (kris) performed an initial
ports investigation followed by an exp-run by Antoine Brodin (antoine).
Essential and all-embracing testing was done by Peter Holm (pho).
The heavy lifting of coordinating all these efforts and bringing the
project to completion were done by Konstantin Belousov (kib).

Sponsored by:	The FreeBSD Foundation (emaste, kib)
Differential revision:	https://reviews.freebsd.org/D10439

1 files changed, 42 insertions, 22 deletions

diff --git a/sys/kern/syscalls.master b/sys/kern/syscalls.master
index 999da9c884ce..ad0fdb27545f 100644
--- a/sys/kern/syscalls.master
+++ b/sys/kern/syscalls.master
@@ -12,7 +12,7 @@
 ;		case where the event exists, but we don't want auditing, the
 ;		event should be #defined to AUE_NULL in audit_kevents.h.
 ;	type	one of STD, OBSOL, UNIMPL, COMPAT, COMPAT4, COMPAT6,
-;		COMPAT7, NODEF, NOARGS, NOPROTO, NOSTD
+;		COMPAT7, COMPAT11, NODEF, NOARGS, NOPROTO, NOSTD
 ;		The COMPAT* options may be combined with one or more NO*
 ;		options separated by '|' with no spaces (e.g. COMPAT|NOARGS)
 ;	name	psuedo-prototype of syscall routine
@@ -29,6 +29,7 @@
 ;	COMPAT6	included on COMPAT_FREEBSD6 #ifdef (FreeBSD 6 compat)
 ;	COMPAT7	included on COMPAT_FREEBSD7 #ifdef (FreeBSD 7 compat)
 ;	COMPAT10 included on COMPAT_FREEBSD10 #ifdef (FreeBSD 10 compat)
+;	COMPAT11 included on COMPAT11 #ifdef (FreeBSD 11 compat)
 ;	OBSOL	obsolete, not included in system, only specifies name
 ;	UNIMPL	not implemented, placeholder only
 ;	NOSTD	implemented but as a lkm that can be statically
@@ -79,7 +80,7 @@
 11	AUE_NULL	OBSOL	execv
 12	AUE_CHDIR	STD	{ int chdir(char *path); }
 13	AUE_FCHDIR	STD	{ int fchdir(int fd); }
-14	AUE_MKNOD	STD	{ int mknod(char *path, int mode, int dev); }
+14	AUE_MKNOD	COMPAT11 { int mknod(char *path, int mode, int dev); }
 15	AUE_CHMOD	STD	{ int chmod(char *path, int mode); }
 16	AUE_CHOWN	STD	{ int chown(char *path, int uid, int gid); }
 17	AUE_NULL	STD	{ int obreak(char *nsize); } break \
@@ -363,9 +364,12 @@
 185	AUE_NULL	UNIMPL	lfs_markv
 186	AUE_NULL	UNIMPL	lfs_segclean
 187	AUE_NULL	UNIMPL	lfs_segwait
-188	AUE_STAT	STD	{ int stat(char *path, struct stat *ub); }
-189	AUE_FSTAT	STD	{ int fstat(int fd, struct stat *sb); }
-190	AUE_LSTAT	STD	{ int lstat(char *path, struct stat *ub); }
+188	AUE_STAT	COMPAT11 { int stat(char *path, \
+				    struct freebsd11_stat *ub); }
+189	AUE_FSTAT	COMPAT11 { int fstat(int fd, \
+				    struct freebsd11_stat *sb); }
+190	AUE_LSTAT	COMPAT11 { int lstat(char *path, \
+				    struct freebsd11_stat *ub); }
 191	AUE_PATHCONF	STD	{ int pathconf(char *path, int name); }
 192	AUE_FPATHCONF	STD	{ int fpathconf(int fd, int name); }
 193	AUE_NULL	UNIMPL	nosys
@@ -375,7 +379,7 @@
 195	AUE_SETRLIMIT	STD	{ int setrlimit(u_int which, \
 				    struct rlimit *rlp); } setrlimit \
 				    __setrlimit_args int
-196	AUE_GETDIRENTRIES	STD	{ int getdirentries(int fd, char *buf, \
+196	AUE_GETDIRENTRIES	COMPAT11 { int getdirentries(int fd, char *buf, \
 				    u_int count, long *basep); }
 197	AUE_MMAP	COMPAT6	{ caddr_t mmap(caddr_t addr, \
 				    size_t len, int prot, int flags, int fd, \
@@ -496,7 +500,7 @@
 269	AUE_NULL	UNIMPL	nosys
 270	AUE_NULL	UNIMPL	nosys
 271	AUE_NULL	UNIMPL	nosys
-272	AUE_O_GETDENTS	STD	{ int getdents(int fd, char *buf, \
+272	AUE_O_GETDENTS	COMPAT11 { int getdents(int fd, char *buf, \
 				    size_t count); }
 273	AUE_NULL	UNIMPL	nosys
 274	AUE_LCHMOD	STD	{ int lchmod(char *path, mode_t mode); }
@@ -507,9 +511,9 @@
 				    struct timeval *tptr); }
 277	AUE_MSYNC	NOPROTO	{ int msync(void *addr, size_t len, \
 				    int flags); } netbsd_msync msync_args int
-278	AUE_STAT	STD	{ int nstat(char *path, struct nstat *ub); }
-279	AUE_FSTAT	STD	{ int nfstat(int fd, struct nstat *sb); }
-280	AUE_LSTAT	STD	{ int nlstat(char *path, struct nstat *ub); }
+278	AUE_STAT	COMPAT11 { int nstat(char *path, struct nstat *ub); }
+279	AUE_FSTAT	COMPAT11 { int nfstat(int fd, struct nstat *sb); }
+280	AUE_LSTAT	COMPAT11 { int nlstat(char *path, struct nstat *ub); }
 281	AUE_NULL	UNIMPL	nosys
 282	AUE_NULL	UNIMPL	nosys
 283	AUE_NULL	UNIMPL	nosys
@@ -535,8 +539,8 @@
 				    struct ostatfs *buf); }
 298	AUE_FHOPEN	STD	{ int fhopen(const struct fhandle *u_fhp, \
 				    int flags); }
-299	AUE_FHSTAT	STD	{ int fhstat(const struct fhandle *u_fhp, \
-				    struct stat *sb); }
+299	AUE_FHSTAT	COMPAT11 { int fhstat(const struct fhandle *u_fhp, \
+				    struct freebsd11_stat *sb); }
 ; syscall numbers for FreeBSD
 300	AUE_NULL	STD	{ int modnext(int modid); }
 301	AUE_NULL	STD	{ int modstat(int modid, \
@@ -707,13 +711,14 @@
 				    off_t *sbytes, int flags); }
 394	AUE_NULL	STD	{ int mac_syscall(const char *policy, \
 				    int call, void *arg); }
-395	AUE_GETFSSTAT	STD	{ int getfsstat(struct statfs *buf, \
+395	AUE_GETFSSTAT	COMPAT11 { int getfsstat(struct freebsd11_statfs *buf, \
 				    long bufsize, int mode); }
-396	AUE_STATFS	STD	{ int statfs(char *path, \
-				    struct statfs *buf); }
-397	AUE_FSTATFS	STD	{ int fstatfs(int fd, struct statfs *buf); }
-398	AUE_FHSTATFS	STD	{ int fhstatfs(const struct fhandle *u_fhp, \
-				    struct statfs *buf); }
+396	AUE_STATFS	COMPAT11 { int statfs(char *path, \
+				    struct freebsd11_statfs *buf); }
+397	AUE_FSTATFS	COMPAT11 { int fstatfs(int fd, \
+				    struct freebsd11_statfs *buf); }
+398	AUE_FHSTATFS	COMPAT11 { int fhstatfs(const struct fhandle *u_fhp, \
+				    struct freebsd11_statfs *buf); }
 399	AUE_NULL	UNIMPL	nosys
 400	AUE_SEMCLOSE	NOSTD	{ int ksem_close(semid_t id); }
 401	AUE_SEMPOST	NOSTD	{ int ksem_post(semid_t id); }
@@ -883,16 +888,16 @@
 				    gid_t gid, int flag); }
 492	AUE_FEXECVE	STD	{ int fexecve(int fd, char **argv, \
 				    char **envv); }
-493	AUE_FSTATAT	STD	{ int fstatat(int fd, char *path, \
-				    struct stat *buf, int flag); }
+493	AUE_FSTATAT	COMPAT11 { int fstatat(int fd, char *path, \
+				    struct freebsd11_stat *buf, int flag); }
 494	AUE_FUTIMESAT	STD	{ int futimesat(int fd, char *path, \
 				    struct timeval *times); }
 495	AUE_LINKAT	STD	{ int linkat(int fd1, char *path1, int fd2, \
 				    char *path2, int flag); }
 496	AUE_MKDIRAT	STD	{ int mkdirat(int fd, char *path, mode_t mode); }
 497	AUE_MKFIFOAT	STD	{ int mkfifoat(int fd, char *path, mode_t mode); }
-498	AUE_MKNODAT	STD	{ int mknodat(int fd, char *path, mode_t mode, \
-				    dev_t dev); }
+498	AUE_MKNODAT	COMPAT11 { int mknodat(int fd, char *path, mode_t mode, \
+				    uint32_t dev); }
 ; XXX: see the comment for open
 499	AUE_OPENAT_RWTC	STD	{ int openat(int fd, char *path, int flag, \
 				    mode_t mode); }
@@ -997,6 +1002,21 @@
 				    id_t id, const struct \
 				    vm_domain_policy_entry *policy); }
 550	AUE_FSYNC	STD	{ int fdatasync(int fd); }
+551	AUE_FSTAT	STD	{ int fstat(int fd, struct stat *sb); }
+552	AUE_FSTATAT	STD	{ int fstatat(int fd, char *path, \
+				    struct stat *buf, int flag); }
+553	AUE_FHSTAT	STD	{ int fhstat(const struct fhandle *u_fhp, \
+				    struct stat *sb); }
+554	AUE_GETDIRENTRIES STD	{ ssize_t getdirentries(int fd, char *buf, \
+				    size_t count, off_t *basep); }
+555	AUE_STATFS	STD	{ int statfs(char *path, struct statfs *buf); }
+556	AUE_FSTATFS	STD	{ int fstatfs(int fd, struct statfs *buf); }
+557	AUE_GETFSSTAT	STD	{ int getfsstat(struct statfs *buf, \
+				    long bufsize, int mode); }
+558	AUE_FHSTATFS	STD	{ int fhstatfs(const struct fhandle *u_fhp, \
+				    struct statfs *buf); }
+559	AUE_MKNODAT	STD	{ int mknodat(int fd, char *path, mode_t mode, \
+				    dev_t dev); }
 
 ; Please copy any additions and changes to the following compatability tables:
 ; sys/compat/freebsd32/syscalls.master