diff options
| author |   David S. Miller <davem@davemloft.net> | 2018-07-03 10:26:50 +0900 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-07-03 10:29:26 +0900 |
| commit | 5cd3da4ba2397ef07226ca2aa5094ed21ff8198f (patch) | |
| tree | caa3c5968df02c296e9644a98c00e759d011b44c /fs/xfs/libxfs/xfs_bmap.c | |
| parent | Merge branch 'hns3-a-few-code-improvements' (diff) | |
| parent | Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md (diff) | |
| download | linux-dev-5cd3da4ba2397ef07226ca2aa5094ed21ff8198f.tar.xz linux-dev-5cd3da4ba2397ef07226ca2aa5094ed21ff8198f.zip | |
Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net
Simple overlapping changes in stmmac driver.
Adjust skb_gro_flush_final_remcsum function signature to make GRO list
changes in net-next, as per Stephen Rothwell's example merge
resolution.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'fs/xfs/libxfs/xfs_bmap.c')
| -rw-r--r-- | fs/xfs/libxfs/xfs_bmap.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index 01628f0c9a0c..7205268b30bc 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -5780,6 +5780,32 @@ del_cursor: return error; } +/* Make sure we won't be right-shifting an extent past the maximum bound. */ +int +xfs_bmap_can_insert_extents( + struct xfs_inode *ip, + xfs_fileoff_t off, + xfs_fileoff_t shift) +{ + struct xfs_bmbt_irec got; + int is_empty; + int error = 0; + + ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); + + if (XFS_FORCED_SHUTDOWN(ip->i_mount)) + return -EIO; + + xfs_ilock(ip, XFS_ILOCK_EXCL); + error = xfs_bmap_last_extent(NULL, ip, XFS_DATA_FORK, &got, &is_empty); + if (!error && !is_empty && got.br_startoff >= off && + ((got.br_startoff + shift) & BMBT_STARTOFF_MASK) < got.br_startoff) + error = -EINVAL; + xfs_iunlock(ip, XFS_ILOCK_EXCL); + + return error; +} + int xfs_bmap_insert_extents( struct xfs_trans *tp, |