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xfs: cleanup struct xfs_attr_list_context 

Replace the alist char pointer with a void buffer given that different
callers use it in different ways.  Use the chance to remove the typedef
and reduce the indentation of the struct definition so that it doesn't
overflow 80 char lines all over.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Chandan Rajendra <chandanrlinux@gmail.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig 2020-02-26 17:30:37 -08:00 committed by Darrick J. Wong
parent 377f16ac67
commit a9c8c69b49
4 changed files with 54 additions and 53 deletions
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32
fs/xfs/libxfs/xfs_attr.h
View File

@ -99,28 +99,28 @@ typedef struct attrlist_cursor_kern {
typedef void (*put_listent_func_t)(struct xfs_attr_list_context *, int,
unsigned char *, int, int);
typedef struct xfs_attr_list_context {
struct xfs_trans *tp;
struct xfs_inode *dp; /* inode */
struct attrlist_cursor_kern *cursor; /* position in list */
char *alist; /* output buffer */
struct xfs_attr_list_context {
struct xfs_trans *tp;
struct xfs_inode *dp; /* inode */
struct attrlist_cursor_kern *cursor; /* position in list */
void *buffer; /* output buffer */
/*
* Abort attribute list iteration if non-zero. Can be used to pass
* error values to the xfs_attr_list caller.
*/
int seen_enough;
bool allow_incomplete;
int seen_enough;
bool allow_incomplete;
ssize_t count; /* num used entries */
int dupcnt; /* count dup hashvals seen */
int bufsize; /* total buffer size */
int firstu; /* first used byte in buffer */
int flags; /* from VOP call */
int resynch; /* T/F: resynch with cursor */
put_listent_func_t put_listent; /* list output fmt function */
int index; /* index into output buffer */
} xfs_attr_list_context_t;
ssize_t count; /* num used entries */
int dupcnt; /* count dup hashvals seen */
int bufsize; /* total buffer size */
int firstu; /* first used byte in buffer */
int flags; /* from VOP call */
int resynch; /* T/F: resynch with cursor */
put_listent_func_t put_listent; /* list output fmt function */
int index; /* index into output buffer */
};
/*========================================================================

53
fs/xfs/xfs_attr_list.c
View File

@ -488,10 +488,11 @@ xfs_attr3_leaf_list_int(
* Copy out attribute entries for attr_list(), for leaf attribute lists.
*/
STATIC int
xfs_attr_leaf_list(xfs_attr_list_context_t *context)
xfs_attr_leaf_list(
struct xfs_attr_list_context *context)
{
int error;
struct xfs_buf *bp;
struct xfs_buf *bp;
int error;
trace_xfs_attr_leaf_list(context);
@ -527,11 +528,11 @@ xfs_attr_list_int_ilocked(
int
xfs_attr_list_int(
xfs_attr_list_context_t *context)
struct xfs_attr_list_context *context)
{
int error;
xfs_inode_t *dp = context->dp;
uint lock_mode;
struct xfs_inode *dp = context->dp;
uint lock_mode;
int error;
XFS_STATS_INC(dp->i_mount, xs_attr_list);
@ -557,15 +558,15 @@ xfs_attr_list_int(
*/
STATIC void
xfs_attr_put_listent(
xfs_attr_list_context_t *context,
int flags,
unsigned char *name,
int namelen,
int valuelen)
struct xfs_attr_list_context *context,
int flags,
unsigned char *name,
int namelen,
int valuelen)
{
struct attrlist *alist = (struct attrlist *)context->alist;
attrlist_ent_t *aep;
int arraytop;
struct attrlist *alist = context->buffer;
struct attrlist_ent *aep;
int arraytop;
ASSERT(!context->seen_enough);
ASSERT(context->count >= 0);
@ -593,7 +594,7 @@ xfs_attr_put_listent(
return;
}
aep = (attrlist_ent_t *)&context->alist[context->firstu];
aep = context->buffer + context->firstu;
aep->a_valuelen = valuelen;
memcpy(aep->a_name, name, namelen);
aep->a_name[namelen] = 0;
@ -612,15 +613,15 @@ xfs_attr_put_listent(
*/
int
xfs_attr_list(
xfs_inode_t *dp,
char *buffer,
int bufsize,
int flags,
attrlist_cursor_kern_t *cursor)
struct xfs_inode *dp,
char *buffer,
int bufsize,
int flags,
struct attrlist_cursor_kern *cursor)
{
xfs_attr_list_context_t context;
struct attrlist *alist;
int error;
struct xfs_attr_list_context context;
struct attrlist *alist;
int error;
/*
* Validate the cursor.
@ -645,12 +646,12 @@ xfs_attr_list(
context.cursor = cursor;
context.resynch = 1;
context.flags = flags;
context.alist = buffer;
context.buffer = buffer;
context.bufsize = (bufsize & ~(sizeof(int)-1)); /* align */
context.firstu = context.bufsize;
context.put_listent = xfs_attr_put_listent;
alist = (struct attrlist *)context.alist;
alist = context.buffer;
alist->al_count = 0;
alist->al_more = 0;
alist->al_offset[0] = context.bufsize;

16
fs/xfs/xfs_trace.h
View File

@ -45,7 +45,7 @@ DECLARE_EVENT_CLASS(xfs_attr_list_class,
__field(u32, hashval)
__field(u32, blkno)
__field(u32, offset)
__field(void *, alist)
__field(void *, buffer)
__field(int, bufsize)
__field(int, count)
__field(int, firstu)
@ -58,21 +58,21 @@ DECLARE_EVENT_CLASS(xfs_attr_list_class,
__entry->hashval = ctx->cursor->hashval;
__entry->blkno = ctx->cursor->blkno;
__entry->offset = ctx->cursor->offset;
__entry->alist = ctx->alist;
__entry->buffer = ctx->buffer;
__entry->bufsize = ctx->bufsize;
__entry->count = ctx->count;
__entry->firstu = ctx->firstu;
__entry->flags = ctx->flags;
),
TP_printk("dev %d:%d ino 0x%llx cursor h/b/o 0x%x/0x%x/%u dupcnt %u "
"alist %p size %u count %u firstu %u flags %d %s",
"buffer %p size %u count %u firstu %u flags %d %s",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->ino,
__entry->hashval,
__entry->blkno,
__entry->offset,
__entry->dupcnt,
__entry->alist,
__entry->buffer,
__entry->bufsize,
__entry->count,
__entry->firstu,
@ -169,7 +169,7 @@ TRACE_EVENT(xfs_attr_list_node_descend,
__field(u32, hashval)
__field(u32, blkno)
__field(u32, offset)
__field(void *, alist)
__field(void *, buffer)
__field(int, bufsize)
__field(int, count)
__field(int, firstu)
@ -184,7 +184,7 @@ TRACE_EVENT(xfs_attr_list_node_descend,
__entry->hashval = ctx->cursor->hashval;
__entry->blkno = ctx->cursor->blkno;
__entry->offset = ctx->cursor->offset;
__entry->alist = ctx->alist;
__entry->buffer = ctx->buffer;
__entry->bufsize = ctx->bufsize;
__entry->count = ctx->count;
__entry->firstu = ctx->firstu;
@ -193,7 +193,7 @@ TRACE_EVENT(xfs_attr_list_node_descend,
__entry->bt_before = be32_to_cpu(btree->before);
),
TP_printk("dev %d:%d ino 0x%llx cursor h/b/o 0x%x/0x%x/%u dupcnt %u "
"alist %p size %u count %u firstu %u flags %d %s "
"buffer %p size %u count %u firstu %u flags %d %s "
"node hashval %u, node before %u",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->ino,
@ -201,7 +201,7 @@ TRACE_EVENT(xfs_attr_list_node_descend,
__entry->blkno,
__entry->offset,
__entry->dupcnt,
__entry->alist,
__entry->buffer,
__entry->bufsize,
__entry->count,
__entry->firstu,

6
fs/xfs/xfs_xattr.c
View File

@ -134,7 +134,7 @@ __xfs_xattr_put_listent(
if (context->count < 0 || context->seen_enough)
return;
if (!context->alist)
if (!context->buffer)
goto compute_size;
arraytop = context->count + prefix_len + namelen + 1;
@ -143,7 +143,7 @@ __xfs_xattr_put_listent(
context->seen_enough = 1;
return;
}
offset = (char *)context->alist + context->count;
offset = context->buffer + context->count;
strncpy(offset, prefix, prefix_len);
offset += prefix_len;
strncpy(offset, (char *)name, namelen); /* real name */
@ -229,7 +229,7 @@ xfs_vn_listxattr(
context.dp = XFS_I(inode);
context.cursor = &cursor;
context.resynch = 1;
context.alist = size ? data : NULL;
context.buffer = size ? data : NULL;
context.bufsize = size;
context.firstu = context.bufsize;
context.put_listent = xfs_xattr_put_listent;