diff options
| author | Josef Bacik <jbacik@fb.com> | 2013-12-13 19:02:44 +0400 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2014-01-29 01:19:54 +0400 |
| commit | a5dee37d390f3713f06e286a33b262f0fdb2b0ff (patch) | |
| tree | b8d97aa8300cca3658f0238085d4d13433ba83be /fs | |
| parent | 2ef1fed285d58e77ce777d9a525fed4788b5a6d0 (diff) | |
| download | linux-a5dee37d390f3713f06e286a33b262f0fdb2b0ff.tar.xz | |
Btrfs: deal with io_tree->mapping being NULL
I need to add infrastructure to allocate dummy extent buffers for running sanity
tests, and to do this I need to not have to worry about having an
address_mapping for an io_tree, so just fix up the places where we assume that
all io_tree's have a non-NULL ->mapping. Thanks,
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/extent_io.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 5fc9481515f3..1d8244d39b66 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -77,13 +77,19 @@ void btrfs_leak_debug_check(void) } } -#define btrfs_debug_check_extent_io_range(inode, start, end) \ - __btrfs_debug_check_extent_io_range(__func__, (inode), (start), (end)) +#define btrfs_debug_check_extent_io_range(tree, start, end) \ + __btrfs_debug_check_extent_io_range(__func__, (tree), (start), (end)) static inline void __btrfs_debug_check_extent_io_range(const char *caller, - struct inode *inode, u64 start, u64 end) + struct extent_io_tree *tree, u64 start, u64 end) { - u64 isize = i_size_read(inode); + struct inode *inode; + u64 isize; + if (!tree->mapping) + return; + + inode = tree->mapping->host; + isize = i_size_read(inode); if (end >= PAGE_SIZE && (end % 2) == 0 && end != isize - 1) { printk_ratelimited(KERN_DEBUG "btrfs: %s: ino %llu isize %llu odd range [%llu,%llu]\n", @@ -124,6 +130,8 @@ static noinline void flush_write_bio(void *data); static inline struct btrfs_fs_info * tree_fs_info(struct extent_io_tree *tree) { + if (!tree->mapping) + return NULL; return btrfs_sb(tree->mapping->host->i_sb); } @@ -570,7 +578,7 @@ int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int err; int clear = 0; - btrfs_debug_check_extent_io_range(tree->mapping->host, start, end); + btrfs_debug_check_extent_io_range(tree, start, end); if (bits & EXTENT_DELALLOC) bits |= EXTENT_NORESERVE; @@ -730,7 +738,7 @@ static void wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, struct extent_state *state; struct rb_node *node; - btrfs_debug_check_extent_io_range(tree->mapping->host, start, end); + btrfs_debug_check_extent_io_range(tree, start, end); spin_lock(&tree->lock); again: @@ -817,7 +825,7 @@ __set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, u64 last_start; u64 last_end; - btrfs_debug_check_extent_io_range(tree->mapping->host, start, end); + btrfs_debug_check_extent_io_range(tree, start, end); bits |= EXTENT_FIRST_DELALLOC; again: @@ -1043,7 +1051,7 @@ int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, u64 last_start; u64 last_end; - btrfs_debug_check_extent_io_range(tree->mapping->host, start, end); + btrfs_debug_check_extent_io_range(tree, start, end); again: if (!prealloc && (mask & __GFP_WAIT)) { |