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authorLi Zefan <lizf@cn.fujitsu.com>2011-04-20 06:31:50 +0400
committerLi Zefan <lizf@cn.fujitsu.com>2011-04-25 12:46:09 +0400
commit33345d01522f8152f99dc84a3e7a1a45707f387f (patch)
tree6a978702dc4421768e63501fa15bc8fedd5bff32 /fs/btrfs/compression.c
parent0414efae7989a2183fb2cc000ab285c4c2836a00 (diff)
downloadlinux-33345d01522f8152f99dc84a3e7a1a45707f387f.tar.xz
Btrfs: Always use 64bit inode number
There's a potential problem in 32bit system when we exhaust 32bit inode numbers and start to allocate big inode numbers, because btrfs uses inode->i_ino in many places. So here we always use BTRFS_I(inode)->location.objectid, which is an u64 variable. There are 2 exceptions that BTRFS_I(inode)->location.objectid != inode->i_ino: the btree inode (0 vs 1) and empty subvol dirs (256 vs 2), and inode->i_ino will be used in those cases. Another reason to make this change is I'm going to use a special inode to save free ino cache, and the inode number must be > (u64)-256. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Diffstat (limited to 'fs/btrfs/compression.c')
-rw-r--r--fs/btrfs/compression.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index 41d1d7c70e29..369d5068ac7a 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -125,9 +125,10 @@ static int check_compressed_csum(struct inode *inode,
kunmap_atomic(kaddr, KM_USER0);
if (csum != *cb_sum) {
- printk(KERN_INFO "btrfs csum failed ino %lu "
+ printk(KERN_INFO "btrfs csum failed ino %llu "
"extent %llu csum %u "
- "wanted %u mirror %d\n", inode->i_ino,
+ "wanted %u mirror %d\n",
+ (unsigned long long)btrfs_ino(inode),
(unsigned long long)disk_start,
csum, *cb_sum, cb->mirror_num);
ret = -EIO;