From: Darrick J. Wong <[email protected]>
Smatch complains about the following:
fs/xfs/libxfs/xfs_dir2_leaf.c:848 xfs_dir2_leaf_addname() error:
uninitialized symbol 'lowstale'.
fs/xfs/libxfs/xfs_dir2_leaf.c:849 xfs_dir2_leaf_addname() error:
uninitialized symbol 'highstale'.
I don't think there's any incorrect behavior associated with the
uninitialized variable, but as the author of the previous zero-init
patch points out, it's best not to be passing around pointers to
uninitialized stack areas.
Signed-off-by: Darrick J. Wong <[email protected]>
---
fs/xfs/libxfs/xfs_dir2_leaf.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_dir2_leaf.c b/fs/xfs/libxfs/xfs_dir2_leaf.c
index 9a3767818c50..2abf945e5844 100644
--- a/fs/xfs/libxfs/xfs_dir2_leaf.c
+++ b/fs/xfs/libxfs/xfs_dir2_leaf.c
@@ -574,7 +574,7 @@ xfs_dir2_leaf_addname(
xfs_dir2_data_unused_t *dup; /* data unused entry */
int error; /* error return value */
int grown; /* allocated new data block */
- int highstale; /* index of next stale leaf */
+ int highstale = 0; /* index of next stale leaf */
int i; /* temporary, index */
int index; /* leaf table position */
struct xfs_buf *lbp; /* leaf's buffer */
@@ -583,7 +583,7 @@ xfs_dir2_leaf_addname(
xfs_dir2_leaf_entry_t *lep; /* leaf entry table pointer */
int lfloglow; /* low leaf logging index */
int lfloghigh; /* high leaf logging index */
- int lowstale; /* index of prev stale leaf */
+ int lowstale = 0; /* index of prev stale leaf */
xfs_dir2_leaf_tail_t *ltp; /* leaf tail pointer */
int needbytes; /* leaf block bytes needed */
int needlog; /* need to log data header */
From: Darrick J. Wong <[email protected]>
Remove typedefs and consolidate local variable initialization.
Signed-off-by: Darrick J. Wong <[email protected]>
---
fs/xfs/libxfs/xfs_dir2_leaf.c | 33 +++++++++++++++------------------
1 file changed, 15 insertions(+), 18 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_dir2_leaf.c b/fs/xfs/libxfs/xfs_dir2_leaf.c
index 2abf945e5844..9c2a0a13ed61 100644
--- a/fs/xfs/libxfs/xfs_dir2_leaf.c
+++ b/fs/xfs/libxfs/xfs_dir2_leaf.c
@@ -563,43 +563,40 @@ xfs_dir3_leaf_find_entry(
*/
int /* error */
xfs_dir2_leaf_addname(
- xfs_da_args_t *args) /* operation arguments */
+ struct xfs_da_args *args) /* operation arguments */
{
+ struct xfs_dir3_icleaf_hdr leafhdr;
+ struct xfs_trans *tp = args->trans;
__be16 *bestsp; /* freespace table in leaf */
- int compact; /* need to compact leaves */
- xfs_dir2_data_hdr_t *hdr; /* data block header */
+ __be16 *tagp; /* end of data entry */
struct xfs_buf *dbp; /* data block buffer */
- xfs_dir2_data_entry_t *dep; /* data block entry */
- xfs_inode_t *dp; /* incore directory inode */
- xfs_dir2_data_unused_t *dup; /* data unused entry */
+ struct xfs_buf *lbp; /* leaf's buffer */
+ struct xfs_dir2_leaf *leaf; /* leaf structure */
+ struct xfs_inode *dp = args->dp; /* incore directory inode */
+ struct xfs_dir2_data_hdr *hdr; /* data block header */
+ struct xfs_dir2_data_entry *dep; /* data block entry */
+ struct xfs_dir2_leaf_entry *lep; /* leaf entry table pointer */
+ struct xfs_dir2_leaf_entry *ents;
+ struct xfs_dir2_data_unused *dup; /* data unused entry */
+ struct xfs_dir2_leaf_tail *ltp; /* leaf tail pointer */
+ struct xfs_dir2_data_free *bf; /* bestfree table */
+ int compact; /* need to compact leaves */
int error; /* error return value */
int grown; /* allocated new data block */
int highstale = 0; /* index of next stale leaf */
int i; /* temporary, index */
int index; /* leaf table position */
- struct xfs_buf *lbp; /* leaf's buffer */
- xfs_dir2_leaf_t *leaf; /* leaf structure */
int length; /* length of new entry */
- xfs_dir2_leaf_entry_t *lep; /* leaf entry table pointer */
int lfloglow; /* low leaf logging index */
int lfloghigh; /* high leaf logging index */
int lowstale = 0; /* index of prev stale leaf */
- xfs_dir2_leaf_tail_t *ltp; /* leaf tail pointer */
int needbytes; /* leaf block bytes needed */
int needlog; /* need to log data header */
int needscan; /* need to rescan data free */
- __be16 *tagp; /* end of data entry */
- xfs_trans_t *tp; /* transaction pointer */
xfs_dir2_db_t use_block; /* data block number */
- struct xfs_dir2_data_free *bf; /* bestfree table */
- struct xfs_dir2_leaf_entry *ents;
- struct xfs_dir3_icleaf_hdr leafhdr;
trace_xfs_dir2_leaf_addname(args);
- dp = args->dp;
- tp = args->trans;
-
error = xfs_dir3_leaf_read(tp, dp, args->geo->leafblk, -1, &lbp);
if (error)
return error;
On Mon, Mar 11, 2019 at 09:19:48AM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <[email protected]>
>
> Smatch complains about the following:
>
> fs/xfs/libxfs/xfs_dir2_leaf.c:848 xfs_dir2_leaf_addname() error:
> uninitialized symbol 'lowstale'.
>
> fs/xfs/libxfs/xfs_dir2_leaf.c:849 xfs_dir2_leaf_addname() error:
> uninitialized symbol 'highstale'.
>
> I don't think there's any incorrect behavior associated with the
> uninitialized variable, but as the author of the previous zero-init
> patch points out, it's best not to be passing around pointers to
> uninitialized stack areas.
>
> Signed-off-by: Darrick J. Wong <[email protected]>
Reviewed-by: Nathan Chancellor <[email protected]>
Thanks for this!
> ---
> fs/xfs/libxfs/xfs_dir2_leaf.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/fs/xfs/libxfs/xfs_dir2_leaf.c b/fs/xfs/libxfs/xfs_dir2_leaf.c
> index 9a3767818c50..2abf945e5844 100644
> --- a/fs/xfs/libxfs/xfs_dir2_leaf.c
> +++ b/fs/xfs/libxfs/xfs_dir2_leaf.c
> @@ -574,7 +574,7 @@ xfs_dir2_leaf_addname(
> xfs_dir2_data_unused_t *dup; /* data unused entry */
> int error; /* error return value */
> int grown; /* allocated new data block */
> - int highstale; /* index of next stale leaf */
> + int highstale = 0; /* index of next stale leaf */
> int i; /* temporary, index */
> int index; /* leaf table position */
> struct xfs_buf *lbp; /* leaf's buffer */
> @@ -583,7 +583,7 @@ xfs_dir2_leaf_addname(
> xfs_dir2_leaf_entry_t *lep; /* leaf entry table pointer */
> int lfloglow; /* low leaf logging index */
> int lfloghigh; /* high leaf logging index */
> - int lowstale; /* index of prev stale leaf */
> + int lowstale = 0; /* index of prev stale leaf */
> xfs_dir2_leaf_tail_t *ltp; /* leaf tail pointer */
> int needbytes; /* leaf block bytes needed */
> int needlog; /* need to log data header */
Looks fine. You can add my review. Thx!
Reviewed-by: Allison Henderson <[email protected]>
On 3/11/19 9:19 AM, Darrick J. Wong wrote:
> From: Darrick J. Wong <[email protected]>
>
> Smatch complains about the following:
>
> fs/xfs/libxfs/xfs_dir2_leaf.c:848 xfs_dir2_leaf_addname() error:
> uninitialized symbol 'lowstale'.
>
> fs/xfs/libxfs/xfs_dir2_leaf.c:849 xfs_dir2_leaf_addname() error:
> uninitialized symbol 'highstale'.
>
> I don't think there's any incorrect behavior associated with the
> uninitialized variable, but as the author of the previous zero-init
> patch points out, it's best not to be passing around pointers to
> uninitialized stack areas.
>
> Signed-off-by: Darrick J. Wong <[email protected]>
> ---
> fs/xfs/libxfs/xfs_dir2_leaf.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/fs/xfs/libxfs/xfs_dir2_leaf.c b/fs/xfs/libxfs/xfs_dir2_leaf.c
> index 9a3767818c50..2abf945e5844 100644
> --- a/fs/xfs/libxfs/xfs_dir2_leaf.c
> +++ b/fs/xfs/libxfs/xfs_dir2_leaf.c
> @@ -574,7 +574,7 @@ xfs_dir2_leaf_addname(
> xfs_dir2_data_unused_t *dup; /* data unused entry */
> int error; /* error return value */
> int grown; /* allocated new data block */
> - int highstale; /* index of next stale leaf */
> + int highstale = 0; /* index of next stale leaf */
> int i; /* temporary, index */
> int index; /* leaf table position */
> struct xfs_buf *lbp; /* leaf's buffer */
> @@ -583,7 +583,7 @@ xfs_dir2_leaf_addname(
> xfs_dir2_leaf_entry_t *lep; /* leaf entry table pointer */
> int lfloglow; /* low leaf logging index */
> int lfloghigh; /* high leaf logging index */
> - int lowstale; /* index of prev stale leaf */
> + int lowstale = 0; /* index of prev stale leaf */
> xfs_dir2_leaf_tail_t *ltp; /* leaf tail pointer */
> int needbytes; /* leaf block bytes needed */
> int needlog; /* need to log data header */
>
Looks ok to me. Thanks for the clean up.
Reviewed-by: Allison Henderson <[email protected]>
On 3/11/19 9:22 AM, Darrick J. Wong wrote:
> From: Darrick J. Wong <[email protected]>
>
> Remove typedefs and consolidate local variable initialization.
>
> Signed-off-by: Darrick J. Wong <[email protected]>
> ---
> fs/xfs/libxfs/xfs_dir2_leaf.c | 33 +++++++++++++++------------------
> 1 file changed, 15 insertions(+), 18 deletions(-)
>
> diff --git a/fs/xfs/libxfs/xfs_dir2_leaf.c b/fs/xfs/libxfs/xfs_dir2_leaf.c
> index 2abf945e5844..9c2a0a13ed61 100644
> --- a/fs/xfs/libxfs/xfs_dir2_leaf.c
> +++ b/fs/xfs/libxfs/xfs_dir2_leaf.c
> @@ -563,43 +563,40 @@ xfs_dir3_leaf_find_entry(
> */
> int /* error */
> xfs_dir2_leaf_addname(
> - xfs_da_args_t *args) /* operation arguments */
> + struct xfs_da_args *args) /* operation arguments */
> {
> + struct xfs_dir3_icleaf_hdr leafhdr;
> + struct xfs_trans *tp = args->trans;
> __be16 *bestsp; /* freespace table in leaf */
> - int compact; /* need to compact leaves */
> - xfs_dir2_data_hdr_t *hdr; /* data block header */
> + __be16 *tagp; /* end of data entry */
> struct xfs_buf *dbp; /* data block buffer */
> - xfs_dir2_data_entry_t *dep; /* data block entry */
> - xfs_inode_t *dp; /* incore directory inode */
> - xfs_dir2_data_unused_t *dup; /* data unused entry */
> + struct xfs_buf *lbp; /* leaf's buffer */
> + struct xfs_dir2_leaf *leaf; /* leaf structure */
> + struct xfs_inode *dp = args->dp; /* incore directory inode */
> + struct xfs_dir2_data_hdr *hdr; /* data block header */
> + struct xfs_dir2_data_entry *dep; /* data block entry */
> + struct xfs_dir2_leaf_entry *lep; /* leaf entry table pointer */
> + struct xfs_dir2_leaf_entry *ents;
> + struct xfs_dir2_data_unused *dup; /* data unused entry */
> + struct xfs_dir2_leaf_tail *ltp; /* leaf tail pointer */
> + struct xfs_dir2_data_free *bf; /* bestfree table */
> + int compact; /* need to compact leaves */
> int error; /* error return value */
> int grown; /* allocated new data block */
> int highstale = 0; /* index of next stale leaf */
> int i; /* temporary, index */
> int index; /* leaf table position */
> - struct xfs_buf *lbp; /* leaf's buffer */
> - xfs_dir2_leaf_t *leaf; /* leaf structure */
> int length; /* length of new entry */
> - xfs_dir2_leaf_entry_t *lep; /* leaf entry table pointer */
> int lfloglow; /* low leaf logging index */
> int lfloghigh; /* high leaf logging index */
> int lowstale = 0; /* index of prev stale leaf */
> - xfs_dir2_leaf_tail_t *ltp; /* leaf tail pointer */
> int needbytes; /* leaf block bytes needed */
> int needlog; /* need to log data header */
> int needscan; /* need to rescan data free */
> - __be16 *tagp; /* end of data entry */
> - xfs_trans_t *tp; /* transaction pointer */
> xfs_dir2_db_t use_block; /* data block number */
> - struct xfs_dir2_data_free *bf; /* bestfree table */
> - struct xfs_dir2_leaf_entry *ents;
> - struct xfs_dir3_icleaf_hdr leafhdr;
>
> trace_xfs_dir2_leaf_addname(args);
>
> - dp = args->dp;
> - tp = args->trans;
> -
> error = xfs_dir3_leaf_read(tp, dp, args->geo->leafblk, -1, &lbp);
> if (error)
> return error;
>
On Mon, Mar 11, 2019 at 09:19:48AM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <[email protected]>
>
> Smatch complains about the following:
>
> fs/xfs/libxfs/xfs_dir2_leaf.c:848 xfs_dir2_leaf_addname() error:
> uninitialized symbol 'lowstale'.
>
> fs/xfs/libxfs/xfs_dir2_leaf.c:849 xfs_dir2_leaf_addname() error:
> uninitialized symbol 'highstale'.
>
> I don't think there's any incorrect behavior associated with the
> uninitialized variable, but as the author of the previous zero-init
> patch points out, it's best not to be passing around pointers to
> uninitialized stack areas.
>
> Signed-off-by: Darrick J. Wong <[email protected]>
Reviewed-by: Bill O'Donnell <[email protected]>
> ---
> fs/xfs/libxfs/xfs_dir2_leaf.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/fs/xfs/libxfs/xfs_dir2_leaf.c b/fs/xfs/libxfs/xfs_dir2_leaf.c
> index 9a3767818c50..2abf945e5844 100644
> --- a/fs/xfs/libxfs/xfs_dir2_leaf.c
> +++ b/fs/xfs/libxfs/xfs_dir2_leaf.c
> @@ -574,7 +574,7 @@ xfs_dir2_leaf_addname(
> xfs_dir2_data_unused_t *dup; /* data unused entry */
> int error; /* error return value */
> int grown; /* allocated new data block */
> - int highstale; /* index of next stale leaf */
> + int highstale = 0; /* index of next stale leaf */
> int i; /* temporary, index */
> int index; /* leaf table position */
> struct xfs_buf *lbp; /* leaf's buffer */
> @@ -583,7 +583,7 @@ xfs_dir2_leaf_addname(
> xfs_dir2_leaf_entry_t *lep; /* leaf entry table pointer */
> int lfloglow; /* low leaf logging index */
> int lfloghigh; /* high leaf logging index */
> - int lowstale; /* index of prev stale leaf */
> + int lowstale = 0; /* index of prev stale leaf */
> xfs_dir2_leaf_tail_t *ltp; /* leaf tail pointer */
> int needbytes; /* leaf block bytes needed */
> int needlog; /* need to log data header */
On Mon, Mar 11, 2019 at 09:22:32AM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <[email protected]>
>
> Remove typedefs and consolidate local variable initialization.
>
> Signed-off-by: Darrick J. Wong <[email protected]>
Reviewed-by: Bill O'Donnell <[email protected]>
> ---
> fs/xfs/libxfs/xfs_dir2_leaf.c | 33 +++++++++++++++------------------
> 1 file changed, 15 insertions(+), 18 deletions(-)
>
> diff --git a/fs/xfs/libxfs/xfs_dir2_leaf.c b/fs/xfs/libxfs/xfs_dir2_leaf.c
> index 2abf945e5844..9c2a0a13ed61 100644
> --- a/fs/xfs/libxfs/xfs_dir2_leaf.c
> +++ b/fs/xfs/libxfs/xfs_dir2_leaf.c
> @@ -563,43 +563,40 @@ xfs_dir3_leaf_find_entry(
> */
> int /* error */
> xfs_dir2_leaf_addname(
> - xfs_da_args_t *args) /* operation arguments */
> + struct xfs_da_args *args) /* operation arguments */
> {
> + struct xfs_dir3_icleaf_hdr leafhdr;
> + struct xfs_trans *tp = args->trans;
> __be16 *bestsp; /* freespace table in leaf */
> - int compact; /* need to compact leaves */
> - xfs_dir2_data_hdr_t *hdr; /* data block header */
> + __be16 *tagp; /* end of data entry */
> struct xfs_buf *dbp; /* data block buffer */
> - xfs_dir2_data_entry_t *dep; /* data block entry */
> - xfs_inode_t *dp; /* incore directory inode */
> - xfs_dir2_data_unused_t *dup; /* data unused entry */
> + struct xfs_buf *lbp; /* leaf's buffer */
> + struct xfs_dir2_leaf *leaf; /* leaf structure */
> + struct xfs_inode *dp = args->dp; /* incore directory inode */
> + struct xfs_dir2_data_hdr *hdr; /* data block header */
> + struct xfs_dir2_data_entry *dep; /* data block entry */
> + struct xfs_dir2_leaf_entry *lep; /* leaf entry table pointer */
> + struct xfs_dir2_leaf_entry *ents;
> + struct xfs_dir2_data_unused *dup; /* data unused entry */
> + struct xfs_dir2_leaf_tail *ltp; /* leaf tail pointer */
> + struct xfs_dir2_data_free *bf; /* bestfree table */
> + int compact; /* need to compact leaves */
> int error; /* error return value */
> int grown; /* allocated new data block */
> int highstale = 0; /* index of next stale leaf */
> int i; /* temporary, index */
> int index; /* leaf table position */
> - struct xfs_buf *lbp; /* leaf's buffer */
> - xfs_dir2_leaf_t *leaf; /* leaf structure */
> int length; /* length of new entry */
> - xfs_dir2_leaf_entry_t *lep; /* leaf entry table pointer */
> int lfloglow; /* low leaf logging index */
> int lfloghigh; /* high leaf logging index */
> int lowstale = 0; /* index of prev stale leaf */
> - xfs_dir2_leaf_tail_t *ltp; /* leaf tail pointer */
> int needbytes; /* leaf block bytes needed */
> int needlog; /* need to log data header */
> int needscan; /* need to rescan data free */
> - __be16 *tagp; /* end of data entry */
> - xfs_trans_t *tp; /* transaction pointer */
> xfs_dir2_db_t use_block; /* data block number */
> - struct xfs_dir2_data_free *bf; /* bestfree table */
> - struct xfs_dir2_leaf_entry *ents;
> - struct xfs_dir3_icleaf_hdr leafhdr;
>
> trace_xfs_dir2_leaf_addname(args);
>
> - dp = args->dp;
> - tp = args->trans;
> -
> error = xfs_dir3_leaf_read(tp, dp, args->geo->leafblk, -1, &lbp);
> if (error)
> return error;