On Wed, Sep 02, 2020 at 04:40:59PM +0200, Carlos Maiolino wrote:
> xfs_attr_sf_totsize() requires access to xfs_inode structure, so, once
> xfs_attr_shortform_addname() is its only user, move it to xfs_attr.c
> instead of playing with more #includes.
>
> Signed-off-by: Carlos Maiolino <cmaiolino@xxxxxxxxxx>
> ---
>
> V2:
> - keep macro comments above inline functions
> - Use struct_size() on xfs_attr_sf_entsize()
>
> fs/xfs/libxfs/xfs_attr.c | 13 ++++++++++---
> fs/xfs/libxfs/xfs_attr_leaf.c | 16 ++++++++--------
> fs/xfs/libxfs/xfs_attr_sf.h | 28 +++++++++++++++++-----------
> fs/xfs/xfs_attr_list.c | 4 ++--
> 4 files changed, 37 insertions(+), 24 deletions(-)
>
> diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
> index 2e055c079f397..ff1fa2ed40ab9 100644
> --- a/fs/xfs/libxfs/xfs_attr.c
> +++ b/fs/xfs/libxfs/xfs_attr.c
> @@ -428,7 +428,7 @@ xfs_attr_set(
> */
> if (XFS_IFORK_Q(dp) == 0) {
> int sf_size = sizeof(struct xfs_attr_sf_hdr) +
> - XFS_ATTR_SF_ENTSIZE_BYNAME(args->namelen,
> + xfs_attr_sf_entsize_byname(args->namelen,
> args->valuelen);
>
> error = xfs_bmap_add_attrfork(dp, sf_size, rsvd);
> @@ -523,6 +523,13 @@ xfs_attr_set(
> * External routines when attribute list is inside the inode
> *========================================================================*/
>
> +/* total space in use */
> +static inline int xfs_attr_sf_totsize(struct xfs_inode *dp) {
> + struct xfs_attr_shortform *sf =
> + (struct xfs_attr_shortform *)dp->i_afp->if_u1.if_data;
> + return be16_to_cpu(sf->hdr.totsize);
Please add a newline between the variable declaration and the return
statement.
> +}
> +
> /*
> * Add a name to the shortform attribute list structure
> * This is the external routine.
> @@ -555,8 +562,8 @@ xfs_attr_shortform_addname(xfs_da_args_t *args)
> args->valuelen >= XFS_ATTR_SF_ENTSIZE_MAX)
> return -ENOSPC;
>
> - newsize = XFS_ATTR_SF_TOTSIZE(args->dp);
> - newsize += XFS_ATTR_SF_ENTSIZE_BYNAME(args->namelen, args->valuelen);
> + newsize = xfs_attr_sf_totsize(args->dp);
> + newsize += xfs_attr_sf_entsize_byname(args->namelen, args->valuelen);
>
> forkoff = xfs_attr_shortform_bytesfit(args->dp, newsize);
> if (!forkoff)
> diff --git a/fs/xfs/libxfs/xfs_attr_leaf.c b/fs/xfs/libxfs/xfs_attr_leaf.c
> index 89193871e6a7f..f64ab351b760c 100644
> --- a/fs/xfs/libxfs/xfs_attr_leaf.c
> +++ b/fs/xfs/libxfs/xfs_attr_leaf.c
> @@ -684,9 +684,9 @@ xfs_attr_sf_findname(
> sf = (struct xfs_attr_shortform *)args->dp->i_afp->if_u1.if_data;
> sfe = &sf->list[0];
> end = sf->hdr.count;
> - for (i = 0; i < end; sfe = XFS_ATTR_SF_NEXTENTRY(sfe),
> + for (i = 0; i < end; sfe = xfs_attr_sf_nextentry(sfe),
> base += size, i++) {
> - size = XFS_ATTR_SF_ENTSIZE(sfe);
> + size = xfs_attr_sf_entsize(sfe);
> if (!xfs_attr_match(args, sfe->namelen, sfe->nameval,
> sfe->flags))
> continue;
> @@ -733,7 +733,7 @@ xfs_attr_shortform_add(
> ASSERT(0);
>
> offset = (char *)sfe - (char *)sf;
> - size = XFS_ATTR_SF_ENTSIZE_BYNAME(args->namelen, args->valuelen);
> + size = xfs_attr_sf_entsize_byname(args->namelen, args->valuelen);
> xfs_idata_realloc(dp, size, XFS_ATTR_FORK);
> sf = (struct xfs_attr_shortform *)ifp->if_u1.if_data;
> sfe = (struct xfs_attr_sf_entry *)((char *)sf + offset);
> @@ -792,7 +792,7 @@ xfs_attr_shortform_remove(
> error = xfs_attr_sf_findname(args, &sfe, &base);
> if (error != -EEXIST)
> return error;
> - size = XFS_ATTR_SF_ENTSIZE(sfe);
> + size = xfs_attr_sf_entsize(sfe);
>
> /*
> * Fix up the attribute fork data, covering the hole
> @@ -849,7 +849,7 @@ xfs_attr_shortform_lookup(xfs_da_args_t *args)
> sf = (struct xfs_attr_shortform *)ifp->if_u1.if_data;
> sfe = &sf->list[0];
> for (i = 0; i < sf->hdr.count;
> - sfe = XFS_ATTR_SF_NEXTENTRY(sfe), i++) {
> + sfe = xfs_attr_sf_nextentry(sfe), i++) {
> if (xfs_attr_match(args, sfe->namelen, sfe->nameval,
> sfe->flags))
> return -EEXIST;
> @@ -876,7 +876,7 @@ xfs_attr_shortform_getvalue(
> sf = (struct xfs_attr_shortform *)args->dp->i_afp->if_u1.if_data;
> sfe = &sf->list[0];
> for (i = 0; i < sf->hdr.count;
> - sfe = XFS_ATTR_SF_NEXTENTRY(sfe), i++) {
> + sfe = xfs_attr_sf_nextentry(sfe), i++) {
> if (xfs_attr_match(args, sfe->namelen, sfe->nameval,
> sfe->flags))
> return xfs_attr_copy_value(args,
> @@ -951,7 +951,7 @@ xfs_attr_shortform_to_leaf(
> ASSERT(error != -ENOSPC);
> if (error)
> goto out;
> - sfe = XFS_ATTR_SF_NEXTENTRY(sfe);
> + sfe = xfs_attr_sf_nextentry(sfe);
> }
> error = 0;
> *leaf_bp = bp;
> @@ -1049,7 +1049,7 @@ xfs_attr_shortform_verify(
> * within the data buffer. The next entry starts after the
> * name component, so nextentry is an acceptable test.
> */
> - next_sfep = XFS_ATTR_SF_NEXTENTRY(sfep);
> + next_sfep = xfs_attr_sf_nextentry(sfep);
> if ((char *)next_sfep > endp)
> return __this_address;
>
> diff --git a/fs/xfs/libxfs/xfs_attr_sf.h b/fs/xfs/libxfs/xfs_attr_sf.h
> index f608a2966d7f8..0d761306da965 100644
> --- a/fs/xfs/libxfs/xfs_attr_sf.h
> +++ b/fs/xfs/libxfs/xfs_attr_sf.h
> @@ -26,18 +26,24 @@ typedef struct xfs_attr_sf_sort {
> unsigned char *name; /* name value, pointer into buffer */
> } xfs_attr_sf_sort_t;
>
> -#define XFS_ATTR_SF_ENTSIZE_BYNAME(nlen,vlen) /* space name/value uses */ \
> - (((int)sizeof(struct xfs_attr_sf_entry) + (nlen)+(vlen)))
> #define XFS_ATTR_SF_ENTSIZE_MAX /* max space for name&value */ \
> ((1 << (NBBY*(int)sizeof(uint8_t))) - 1)
> -#define XFS_ATTR_SF_ENTSIZE(sfep) /* space an entry uses */ \
> - ((int)sizeof(struct xfs_attr_sf_entry) + \
> - (sfep)->namelen+(sfep)->valuelen)
> -#define XFS_ATTR_SF_NEXTENTRY(sfep) /* next entry in struct */ \
> - ((struct xfs_attr_sf_entry *)((char *)(sfep) + \
> - XFS_ATTR_SF_ENTSIZE(sfep)))
> -#define XFS_ATTR_SF_TOTSIZE(dp) /* total space in use */ \
> - (be16_to_cpu(((struct xfs_attr_shortform *) \
> - ((dp)->i_afp->if_u1.if_data))->hdr.totsize))
> +
> +/* space name/value uses */
> +static inline int xfs_attr_sf_entsize_byname(uint8_t nlen, uint8_t vlen) {
> + return sizeof(struct xfs_attr_sf_entry) + nlen + vlen;
/me suspects you could (ab)use struct_size here too, e.g.
return struct_size((struct xfs_attr_sf_entry *)NULL, nameval,
nlen + vlen);
Though now I look at the casting mess and think NAH.
Ok never mind. :)
The patch looks ok, modulo that spacing thing from above.
--D
> +}
> +
> +/* space an entry uses */
> +static inline int xfs_attr_sf_entsize(struct xfs_attr_sf_entry *sfep) {
> + return struct_size(sfep, nameval, sfep->namelen + sfep->valuelen);
> +}
> +
> +/* next entry in struct */
> +static inline struct xfs_attr_sf_entry *
> +xfs_attr_sf_nextentry(struct xfs_attr_sf_entry *sfep) {
> + return (struct xfs_attr_sf_entry *)((char *)(sfep) +
> + xfs_attr_sf_entsize(sfep));
> +}
>
> #endif /* __XFS_ATTR_SF_H__ */
> diff --git a/fs/xfs/xfs_attr_list.c b/fs/xfs/xfs_attr_list.c
> index 4eb1d6faecfb2..8f8837fe21cf0 100644
> --- a/fs/xfs/xfs_attr_list.c
> +++ b/fs/xfs/xfs_attr_list.c
> @@ -96,7 +96,7 @@ xfs_attr_shortform_list(
> */
> if (context->seen_enough)
> break;
> - sfe = XFS_ATTR_SF_NEXTENTRY(sfe);
> + sfe = xfs_attr_sf_nextentry(sfe);
> }
> trace_xfs_attr_list_sf_all(context);
> return 0;
> @@ -136,7 +136,7 @@ xfs_attr_shortform_list(
> /* These are bytes, and both on-disk, don't endian-flip */
> sbp->valuelen = sfe->valuelen;
> sbp->flags = sfe->flags;
> - sfe = XFS_ATTR_SF_NEXTENTRY(sfe);
> + sfe = xfs_attr_sf_nextentry(sfe);
> sbp++;
> nsbuf++;
> }
> --
> 2.26.2
>
