CVS commit: [netbsd-9] src/sys/ufs

["Martin Husemann" <martin%netbsd.org@localhost>]

Module Name:    src
Committed By:   martin
Date:           Tue Jan  7 16:16:51 UTC 2025

Modified Files:
        src/sys/ufs/ext2fs [netbsd-9]: ext2fs_vfsops.c
        src/sys/ufs/ffs [netbsd-9]: ffs_vfsops.c ffs_wapbl.c
        src/sys/ufs/lfs [netbsd-9]: lfs_vfsops.c

Log Message:
Pull up following revision(s) (requested by hannken in ticket #1934):

        sys/ufs/ext2fs/ext2fs_vfsops.c: revision 1.228
        sys/ufs/lfs/lfs_vfsops.c: revision 1.383
        sys/ufs/ffs/ffs_wapbl.c: revision 1.50
        sys/ufs/ffs/ffs_vfsops.c: revision 1.383 (patch)
        sys/ufs/ffs/ffs_vfsops.c: revision 1.384 (patch)

Remove comment "we are always called with the filesystem marked `MPBUSY'."
above some xxx_sync() operations.  These operations get called without
any exclusive lock.

This comment appeared with "add quota support" on 1990-05-02.
On 1998/02/18 MNT_MPBUSY disappeared when vfs_busy() was changed from
an exclusive lock to a shared lock.

PR kern/58837 "ffs: Missing locking around fs_fmod/time"

Protect test/clear fs->fs_fmod with um_lock like it is already
protected in ffs_alloc.c.

When writing to disk protect moving superblock to buffer with um_lock.

Set/clear fs->fmod while mounting, updating a mount or unmounting
is safe as these operations run exclusive, either mounting creates
a new file system or the file system is suspended.  Assert suspension
for update and unmount.

PR kern/58837 "ffs: Missing locking around fs_fmod/time"


To generate a diff of this commit:
cvs rdiff -u -r1.214 -r1.214.2.1 src/sys/ufs/ext2fs/ext2fs_vfsops.c
cvs rdiff -u -r1.362.2.1 -r1.362.2.2 src/sys/ufs/ffs/ffs_vfsops.c
cvs rdiff -u -r1.44 -r1.44.4.1 src/sys/ufs/ffs/ffs_wapbl.c
cvs rdiff -u -r1.365.2.1 -r1.365.2.2 src/sys/ufs/lfs/lfs_vfsops.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.