This also explains btrfs fiemap ioctl() return values, especially the positive
return value, which may confuse users.
Signed-off-by: Peng Tao <bergwolf@xxxxxxxxx>
---
fs/btrfs/extent_io.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 6826018..287896e 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2828,6 +2828,11 @@ out:
return sector;
}
+/*
+ * Get the extents count of a file and map the extent to a user-supplied extent
+ * array. Returns 0 on success, 1 when the user-supplied extents array is full,
+ * and negetive values on failure.
+ */
int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
__u64 start, __u64 len, get_extent_t *get_extent)
{
--
1.6.2.GIT
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