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Date: Fri, 1 May 2020 11:59:58 +0530 From: Ritesh Harjani <riteshh@...ux.ibm.com> To: linux-ext4@...r.kernel.org Cc: "Paul E . McKenney" <paulmck@...nel.org>, linux-fsdevel@...r.kernel.org, Jan Kara <jack@...e.com>, tytso@....edu, "Aneesh Kumar K . V" <aneesh.kumar@...ux.ibm.com>, Ritesh Harjani <riteshh@...ux.ibm.com> Subject: [RFC 16/20] ext4: Improve ext_debug() msg in case of block allocation failure ext4_map_blocks() has ext_debug msg early at the start of function. We also get ext_debug msg if we could allocate a block from ext4_ext_map_blocks(). But there is no ext_debug() msg in case of block allocation failure. So add one along with error code. Also add more info in ext_debug() msg like how many blocks were allocated v/s how many were requested in ext4_ext_map_blocks(). Signed-off-by: Ritesh Harjani <riteshh@...ux.ibm.com> --- fs/ext4/extents.c | 4 ++-- fs/ext4/inode.c | 4 ++++ 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index f2b577b315a0..461600c07316 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -4218,10 +4218,10 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, newblock = ext4_mb_new_blocks(handle, &ar, &err); if (!newblock) goto out2; - ext_debug("allocate new block: goal %llu, found %llu/%u\n", - ar.goal, newblock, allocated); allocated_clusters = ar.len; ar.len = EXT4_C2B(sbi, ar.len) - offset; + ext_debug("allocate new block: goal %llu, found %llu/%u, requested %u\n", + ar.goal, newblock, ar.len, allocated); if (ar.len > allocated) ar.len = allocated; diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index e294abeb7f03..5f120af22d48 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -726,6 +726,10 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode, return ret; } } + + if (retval < 0) + ext_debug("failed for inode %lu with err %d\n", + inode->i_ino, retval); return retval; } -- 2.21.0
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