path: root/sys/sys/mount.h
diff options
authorKonstantin Belousov <kib@FreeBSD.org>2017-05-23 09:29:05 +0000
committerKonstantin Belousov <kib@FreeBSD.org>2017-05-23 09:29:05 +0000
commit69921123490b99c2588b0c743bc4af32bbe6601c (patch)
tree4828066c23bd9bbd1672af14fbf0a9e31e47f4a0 /sys/sys/mount.h
parent5f7c516f216995249523ed43e57e3f91bd8f5ff0 (diff)
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
Notes: svn path=/head/; revision=318736
Diffstat (limited to 'sys/sys/mount.h')
1 files changed, 30 insertions, 2 deletions
diff --git a/sys/sys/mount.h b/sys/sys/mount.h
index 9800d97df27e..519b4cf94f52 100644
--- a/sys/sys/mount.h
+++ b/sys/sys/mount.h
@@ -65,8 +65,8 @@ struct fid {
* filesystem statistics
#define MFSNAMELEN 16 /* length of type name including null */
-#define MNAMELEN 88 /* size of on/from name bufs */
-#define STATFS_VERSION 0x20030518 /* current version number */
+#define MNAMELEN 1024 /* size of on/from name bufs */
+#define STATFS_VERSION 0x20140518 /* current version number */
struct statfs {
uint32_t f_version; /* structure version number */
uint32_t f_type; /* type of filesystem */
@@ -92,6 +92,34 @@ struct statfs {
char f_mntonname[MNAMELEN]; /* directory on which mounted */
+#if defined(_WANT_FREEBSD11_STATFS) || defined(_KERNEL)
+#define FREEBSD11_STATFS_VERSION 0x20030518 /* current version number */
+struct freebsd11_statfs {
+ uint32_t f_version; /* structure version number */
+ uint32_t f_type; /* type of filesystem */
+ uint64_t f_flags; /* copy of mount exported flags */
+ uint64_t f_bsize; /* filesystem fragment size */
+ uint64_t f_iosize; /* optimal transfer block size */
+ uint64_t f_blocks; /* total data blocks in filesystem */
+ uint64_t f_bfree; /* free blocks in filesystem */
+ int64_t f_bavail; /* free blocks avail to non-superuser */
+ uint64_t f_files; /* total file nodes in filesystem */
+ int64_t f_ffree; /* free nodes avail to non-superuser */
+ uint64_t f_syncwrites; /* count of sync writes since mount */
+ uint64_t f_asyncwrites; /* count of async writes since mount */
+ uint64_t f_syncreads; /* count of sync reads since mount */
+ uint64_t f_asyncreads; /* count of async reads since mount */
+ uint64_t f_spare[10]; /* unused spare */
+ uint32_t f_namemax; /* maximum filename length */
+ uid_t f_owner; /* user that mounted the filesystem */
+ fsid_t f_fsid; /* filesystem id */
+ char f_charspare[80]; /* spare string space */
+ char f_fstypename[16]; /* filesystem type name */
+ char f_mntfromname[88]; /* mounted filesystem */
+ char f_mntonname[88]; /* directory on which mounted */
+#endif /* _WANT_FREEBSD11_STATFS || _KERNEL */
#ifdef _KERNEL
#define OMFSNAMELEN 16 /* length of fs type name, including null */
#define OMNAMELEN (88 - 2 * sizeof(long)) /* size of on/from name bufs */