diff options
| author | Matthew Dillon <dillon@FreeBSD.org> | 2000-12-17 23:57:05 +0000 |
|---|---|---|
| committer | Matthew Dillon <dillon@FreeBSD.org> | 2000-12-17 23:57:05 +0000 |
| commit | 6ddaf0f45e7b356053af082c8c7dac6b5b3312c6 (patch) | |
| tree | adb87a6ab6bf9d81a15f41a1876046e65e4d85a2 /sys/gnu/ext2fs/ext2_readwrite.c | |
| parent | 6fce744ee340ce56c46936d097c5b07084699e8d (diff) | |
Notes
Diffstat (limited to 'sys/gnu/ext2fs/ext2_readwrite.c')
| -rw-r--r-- | sys/gnu/ext2fs/ext2_readwrite.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sys/gnu/ext2fs/ext2_readwrite.c b/sys/gnu/ext2fs/ext2_readwrite.c index f054a6e897b3..30a2f561c2fd 100644 --- a/sys/gnu/ext2fs/ext2_readwrite.c +++ b/sys/gnu/ext2fs/ext2_readwrite.c @@ -238,10 +238,19 @@ WRITE(ap) if (uio->uio_offset + xfersize > ip->i_size) vnode_pager_setsize(vp, uio->uio_offset + xfersize); + /* + * Avoid a data-consistency race between write() and mmap() + * by ensuring that newly allocated blocks are zerod. The + * race can occur even in the case where the write covers + * the entire block. + */ + flags |= B_CLRBUF; +#if 0 if (fs->s_frag_size > xfersize) flags |= B_CLRBUF; else flags &= ~B_CLRBUF; +#endif error = ext2_balloc(ip, lbn, blkoffset + xfersize, ap->a_cred, &bp, flags); |