diff options
Diffstat (limited to 'sys/fs/ext2fs/ext2_bmap.c')
| -rw-r--r-- | sys/fs/ext2fs/ext2_bmap.c | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/sys/fs/ext2fs/ext2_bmap.c b/sys/fs/ext2fs/ext2_bmap.c index 7d4a880..8656e59 100644 --- a/sys/fs/ext2fs/ext2_bmap.c +++ b/sys/fs/ext2fs/ext2_bmap.c @@ -102,9 +102,6 @@ ext4_bmapext(struct vnode *vp, int32_t bn, int64_t *bnp, int *runp, int *runb) fs = ip->i_e2fs; lbn = bn; - /* - * TODO: need to implement read ahead to improve the performance. - */ if (runp != NULL) *runp = 0; @@ -112,15 +109,25 @@ ext4_bmapext(struct vnode *vp, int32_t bn, int64_t *bnp, int *runp, int *runb) *runb = 0; ext4_ext_find_extent(fs, ip, lbn, &path); - ep = path.ep_ext; - if (ep == NULL) - ret = EIO; - else { - *bnp = fsbtodb(fs, lbn - ep->e_blk + - (ep->e_start_lo | (daddr_t)ep->e_start_hi << 32)); - - if (*bnp == 0) - *bnp = -1; + if (path.ep_is_sparse) { + *bnp = -1; + if (runp != NULL) + *runp = path.ep_sparse_ext.e_len - + (lbn - path.ep_sparse_ext.e_blk) - 1; + } else { + ep = path.ep_ext; + if (ep == NULL) + ret = EIO; + else { + *bnp = fsbtodb(fs, lbn - ep->e_blk + + (ep->e_start_lo | (daddr_t)ep->e_start_hi << 32)); + + if (*bnp == 0) + *bnp = -1; + + if (runp != NULL) + *runp = ep->e_len - (lbn - ep->e_blk) - 1; + } } if (path.ep_bp != NULL) { |
