[XFS] Dynamically allocate xfs_dir2_put_args_t structure to reduce stack
pressure in xfs_dir2_leaf_getdents routine.
SGI-PV: 947312
SGI-Modid: xfs-linux-melb:xfs-kern:25359a
Signed-off-by: Nathan Scott <nathans@sgi.com>
diff --git a/fs/xfs/xfs_dir2_leaf.c b/fs/xfs/xfs_dir2_leaf.c
index d342b6b..e4e07c8f 100644
--- a/fs/xfs/xfs_dir2_leaf.c
+++ b/fs/xfs/xfs_dir2_leaf.c
@@ -766,7 +766,7 @@
xfs_dir2_data_entry_t *dep; /* data entry */
xfs_dir2_data_unused_t *dup; /* unused entry */
int eof; /* reached end of directory */
- int error=0; /* error return value */
+ int error = 0; /* error return value */
int i; /* temporary loop index */
int j; /* temporary loop index */
int length; /* temporary length value */
@@ -778,8 +778,8 @@
xfs_mount_t *mp; /* filesystem mount point */
xfs_dir2_off_t newoff; /* new curoff after new blk */
int nmap; /* mappings to ask xfs_bmapi */
- xfs_dir2_put_args_t p; /* formatting arg bundle */
- char *ptr=NULL; /* pointer to current data */
+ xfs_dir2_put_args_t *p; /* formatting arg bundle */
+ char *ptr = NULL; /* pointer to current data */
int ra_current; /* number of read-ahead blks */
int ra_index; /* *map index for read-ahead */
int ra_offset; /* map entry offset for ra */
@@ -797,9 +797,10 @@
/*
* Setup formatting arguments.
*/
- p.dbp = dbp;
- p.put = put;
- p.uio = uio;
+ p = kmem_alloc(sizeof(*p), KM_SLEEP);
+ p->dbp = dbp;
+ p->put = put;
+ p->uio = uio;
/*
* Set up to bmap a number of blocks based on the caller's
* buffer size, the directory block size, and the filesystem
@@ -1092,24 +1093,24 @@
*/
dep = (xfs_dir2_data_entry_t *)ptr;
- p.namelen = dep->namelen;
+ p->namelen = dep->namelen;
- length = XFS_DIR2_DATA_ENTSIZE(p.namelen);
+ length = XFS_DIR2_DATA_ENTSIZE(p->namelen);
- p.cook = XFS_DIR2_BYTE_TO_DATAPTR(mp, curoff + length);
+ p->cook = XFS_DIR2_BYTE_TO_DATAPTR(mp, curoff + length);
- p.ino = INT_GET(dep->inumber, ARCH_CONVERT);
+ p->ino = INT_GET(dep->inumber, ARCH_CONVERT);
#if XFS_BIG_INUMS
- p.ino += mp->m_inoadd;
+ p->ino += mp->m_inoadd;
#endif
- p.name = (char *)dep->name;
+ p->name = (char *)dep->name;
- error = p.put(&p);
+ error = p->put(p);
/*
* Won't fit. Return to caller.
*/
- if (!p.done) {
+ if (!p->done) {
eof = 0;
break;
}
@@ -1129,6 +1130,7 @@
else
uio->uio_offset = XFS_DIR2_BYTE_TO_DATAPTR(mp, curoff);
kmem_free(map, map_size * sizeof(*map));
+ kmem_free(p, sizeof(*p));
if (bp)
xfs_da_brelse(tp, bp);
return error;
