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| author | kib <kib@FreeBSD.org> | 2009-01-20 11:30:22 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2009-01-20 11:30:22 +0000 |
| commit | ac57d6e717c7b5921f7a8c6d60d1c846ea1d04d5 (patch) | |
| tree | dcb7f2dd79fbec6fe58af1c382774421b3b97268 /sys/ufs/ffs | |
| parent | cbb8defa10711f9b65be83f41f04cbabab84b5fc (diff) | |
| download | FreeBSD-src-ac57d6e717c7b5921f7a8c6d60d1c846ea1d04d5.zip FreeBSD-src-ac57d6e717c7b5921f7a8c6d60d1c846ea1d04d5.tar.gz | |
When extending inode size, we call vnode_pager_setsize(), to have a
address space where to put vnode pages, and then call UFS_BALLOC(),
to actually allocate new block and map it. When UFS_BALLOC() returns
error, sometimes we forget to revert the vm object size increase,
allowing for the pages that are not backed by the logical disk blocks.
Revert vnode_pager_setsize() back when UFS_BALLOC() failed, for
ffs_truncate() and ffs_write().
PR: 129956
Reviewed by: ups
MFC after: 3 weeks
Diffstat (limited to 'sys/ufs/ffs')
| -rw-r--r-- | sys/ufs/ffs/ffs_inode.c | 4 | ||||
| -rw-r--r-- | sys/ufs/ffs/ffs_vnops.c | 4 |
2 files changed, 6 insertions, 2 deletions
diff --git a/sys/ufs/ffs/ffs_inode.c b/sys/ufs/ffs/ffs_inode.c index 2be220e..36aac0e 100644 --- a/sys/ufs/ffs/ffs_inode.c +++ b/sys/ufs/ffs/ffs_inode.c @@ -305,8 +305,10 @@ ffs_truncate(vp, length, flags, cred, td) vnode_pager_setsize(vp, length); flags |= BA_CLRBUF; error = UFS_BALLOC(vp, length - 1, 1, cred, flags, &bp); - if (error) + if (error) { + vnode_pager_setsize(vp, osize); return (error); + } ip->i_size = length; DIP_SET(ip, i_size, length); if (bp->b_bufsize == fs->fs_bsize) diff --git a/sys/ufs/ffs/ffs_vnops.c b/sys/ufs/ffs/ffs_vnops.c index 38dc2b6..e5b3ffe 100644 --- a/sys/ufs/ffs/ffs_vnops.c +++ b/sys/ufs/ffs/ffs_vnops.c @@ -723,8 +723,10 @@ ffs_write(ap) /* XXX is uio->uio_offset the right thing here? */ error = UFS_BALLOC(vp, uio->uio_offset, xfersize, ap->a_cred, flags, &bp); - if (error != 0) + if (error != 0) { + vnode_pager_setsize(vp, ip->i_size); break; + } /* * If the buffer is not valid we have to clear out any * garbage data from the pages instantiated for the buffer. |
