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UFS: write inode block for fdatasync(2) if pointers in inode where allocated

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The fdatasync() description in POSIX specifies that
    all I/O operations shall be completed as defined for synchronized I/O
    data integrity completion.
and then the explanation of Synchronized I/O Data Integrity Completion says
    The write is complete only when the data specified in the write
    request is successfully transferred and all file system
    information required to retrieve the data is successfully
    transferred.

For UFS this means that all pointers must be on disk. Indirect
pointers already contribute to the list of dirty data blocks, so only
direct blocks and root pointers to indirect blocks, both of which
reside in the inode block, should be taken care of. In ffs_balloc(),
mark the inode with the new flag IN_IBLKDATA that specifies that
ffs_syncvnode(DATA_ONLY) needs a call to ffs_update() to flush the
inode block.

Reviewed by:	mckusick
Discussed with:	tmunro
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D25072
This commit is contained in:
Konstantin Belousov 2020-06-04 12:23:15 +00:00
parent 064c283d65
commit 7428630b75
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=361785
4 changed files with 13 additions and 10 deletions
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13
sys/ufs/ffs/ffs_balloc.c
View file

@ -224,7 +224,7 @@ ffs_balloc_ufs1(struct vnode *vp, off_t startoffset, int size,
nsize, 0, bp);
}
dp->di_db[lbn] = dbtofsb(fs, bp->b_blkno);
UFS_INODE_SET_FLAG(ip, IN_CHANGE | IN_UPDATE);
UFS_INODE_SET_FLAG(ip, IN_CHANGE | IN_UPDATE | IN_IBLKDATA);
*bpp = bp;
return (0);
}
@ -280,7 +280,7 @@ ffs_balloc_ufs1(struct vnode *vp, off_t startoffset, int size,
}
allocib = &dp->di_ib[indirs[0].in_off];
*allocib = nb;
UFS_INODE_SET_FLAG(ip, IN_CHANGE | IN_UPDATE);
UFS_INODE_SET_FLAG(ip, IN_CHANGE | IN_UPDATE | IN_IBLKDATA);
}
/*
* Fetch through the indirect blocks, allocating as necessary.
@ -721,7 +721,7 @@ ffs_balloc_ufs2(struct vnode *vp, off_t startoffset, int size,
nsize, 0, bp);
}
dp->di_extb[lbn] = dbtofsb(fs, bp->b_blkno);
UFS_INODE_SET_FLAG(ip, IN_CHANGE);
UFS_INODE_SET_FLAG(ip, IN_CHANGE | IN_IBLKDATA);
*bpp = bp;
return (0);
}
@ -750,7 +750,8 @@ ffs_balloc_ufs2(struct vnode *vp, off_t startoffset, int size,
ip->i_size = smalllblktosize(fs, nb + 1);
dp->di_size = ip->i_size;
dp->di_db[nb] = dbtofsb(fs, bp->b_blkno);
UFS_INODE_SET_FLAG(ip, IN_CHANGE | IN_UPDATE);
UFS_INODE_SET_FLAG(ip, IN_CHANGE | IN_UPDATE |
IN_IBLKDATA);
if (flags & IO_SYNC)
bwrite(bp);
else
@ -820,7 +821,7 @@ ffs_balloc_ufs2(struct vnode *vp, off_t startoffset, int size,
nsize, 0, bp);
}
dp->di_db[lbn] = dbtofsb(fs, bp->b_blkno);
UFS_INODE_SET_FLAG(ip, IN_CHANGE | IN_UPDATE);
UFS_INODE_SET_FLAG(ip, IN_CHANGE | IN_UPDATE | IN_IBLKDATA);
*bpp = bp;
return (0);
}
@ -877,7 +878,7 @@ ffs_balloc_ufs2(struct vnode *vp, off_t startoffset, int size,
}
allocib = &dp->di_ib[indirs[0].in_off];
*allocib = nb;
UFS_INODE_SET_FLAG(ip, IN_CHANGE | IN_UPDATE);
UFS_INODE_SET_FLAG(ip, IN_CHANGE | IN_UPDATE | IN_IBLKDATA);
}
/*
* Fetch through the indirect blocks, allocating as necessary.

2
sys/ufs/ffs/ffs_inode.c
View file

@ -94,7 +94,7 @@ ffs_update(vp, waitfor)
ip = VTOI(vp);
if ((ip->i_flag & IN_MODIFIED) == 0 && waitfor == 0)
return (0);
ip->i_flag &= ~(IN_LAZYACCESS | IN_LAZYMOD | IN_MODIFIED);
ip->i_flag &= ~(IN_LAZYACCESS | IN_LAZYMOD | IN_MODIFIED | IN_IBLKDATA);
fs = ITOFS(ip);
if (fs->fs_ronly && ITOUMP(ip)->um_fsckpid == 0)
return (0);

2
sys/ufs/ffs/ffs_vnops.c
View file

@ -416,6 +416,8 @@ ffs_syncvnode(struct vnode *vp, int waitfor, int flags)
error = ffs_update(vp, 1);
if (DOINGSUJ(vp))
softdep_journal_fsync(VTOI(vp));
} else if ((ip->i_flags & IN_IBLKDATA) != 0) {
error = ffs_update(vp, 1);
}
return (error);
}

6
sys/ufs/ufs/inode.h
View file

@ -129,13 +129,13 @@ struct inode {
suspension finished */
#define IN_EA_LOCKED 0x0080
#define IN_EA_LOCKWAIT 0x0100
#define IN_TRUNCATED 0x0200 /* Journaled truncation pending. */
#define IN_UFS2 0x0400 /* UFS2 vs UFS1 */
#define IN_IBLKDATA 0x0800 /* datasync requires inode block
update */
#define PRINT_INODE_FLAGS "\20\20b16\17b15\16b14\15b13" \
"\14b12\13is_ufs2\12truncated\11ea_lockwait\10ea_locked" \
"\14iblkdata\13is_ufs2\12truncated\11ea_lockwait\10ea_locked" \
"\7lazyaccess\6lazymod\5needsync\4modified\3update\2change\1access"
#define UFS_INODE_FLAG_LAZY_MASK \