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| author | Li Zefan <lizf@cn.fujitsu.com> | 2011-04-20 10:31:50 +0800 |
|---|---|---|
| committer | Li Zefan <lizf@cn.fujitsu.com> | 2011-04-25 16:46:09 +0800 |
| commit | 33345d01522f8152f99dc84a3e7a1a45707f387f (patch) | |
| tree | 6a978702dc4421768e63501fa15bc8fedd5bff32 /fs/btrfs/extent_io.c | |
| parent | 0414efae7989a2183fb2cc000ab285c4c2836a00 (diff) | |
| download | linux-3.10-33345d01522f8152f99dc84a3e7a1a45707f387f.tar.gz linux-3.10-33345d01522f8152f99dc84a3e7a1a45707f387f.tar.bz2 linux-3.10-33345d01522f8152f99dc84a3e7a1a45707f387f.zip | |
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/extent_io.c')
| -rw-r--r-- | fs/btrfs/extent_io.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 5ae0bffaa4d..41d313a0d09 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -3030,7 +3030,7 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, * because there might be preallocation past i_size */ ret = btrfs_lookup_file_extent(NULL, BTRFS_I(inode)->root, - path, inode->i_ino, -1, 0); + path, btrfs_ino(inode), -1, 0); if (ret < 0) { btrfs_free_path(path); return ret; @@ -3043,7 +3043,7 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, found_type = btrfs_key_type(&found_key); /* No extents, but there might be delalloc bits */ - if (found_key.objectid != inode->i_ino || + if (found_key.objectid != btrfs_ino(inode) || found_type != BTRFS_EXTENT_DATA_KEY) { /* have to trust i_size as the end */ last = (u64)-1; |