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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2009-03-28 00:16:58 +0300
committerTheodore Ts'o <tytso@mit.edu>2009-03-28 00:16:58 +0300
commitcc0fb9ad7dbc5a149f4957a0dd6d65881d3d385b (patch)
treecbcf88bcd2306acba7d08e1c8e6ea87b76d3eb25 /fs/ext4
parentfe2c8191faa29d7a09f4962198f6dfab973ceec4 (diff)
downloadlinux-cc0fb9ad7dbc5a149f4957a0dd6d65881d3d385b.tar.xz
ext4: Rename pa_linear to pa_type
Impact: code cleanup This patch rename pa_linear to pa_type and add MB_INODE_PA and MB_GROUP_PA to indicate inode and group prealloc space. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Reviewed-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/mballoc.c21
-rw-r--r--fs/ext4/mballoc.h7
2 files changed, 17 insertions, 11 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index e72c72a0b807..7f6fc41a2dde 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -3555,8 +3555,11 @@ static void ext4_mb_put_pa(struct ext4_allocation_context *ac,
spin_unlock(&pa->pa_lock);
grp_blk = pa->pa_pstart;
- /* If linear, pa_pstart may be in the next group when pa is used up */
- if (pa->pa_linear)
+ /*
+ * If doing group-based preallocation, pa_pstart may be in the
+ * next group when pa is used up
+ */
+ if (pa->pa_type == MB_GROUP_PA)
grp_blk--;
ext4_get_group_no_and_offset(sb, grp_blk, &grp, NULL);
@@ -3651,7 +3654,7 @@ ext4_mb_new_inode_pa(struct ext4_allocation_context *ac)
INIT_LIST_HEAD(&pa->pa_inode_list);
INIT_LIST_HEAD(&pa->pa_group_list);
pa->pa_deleted = 0;
- pa->pa_linear = 0;
+ pa->pa_type = MB_INODE_PA;
mb_debug("new inode pa %p: %llu/%u for %u\n", pa,
pa->pa_pstart, pa->pa_len, pa->pa_lstart);
@@ -3714,7 +3717,7 @@ ext4_mb_new_group_pa(struct ext4_allocation_context *ac)
INIT_LIST_HEAD(&pa->pa_inode_list);
INIT_LIST_HEAD(&pa->pa_group_list);
pa->pa_deleted = 0;
- pa->pa_linear = 1;
+ pa->pa_type = MB_GROUP_PA;
mb_debug("new group pa %p: %llu/%u for %u\n", pa,
pa->pa_pstart, pa->pa_len, pa->pa_lstart);
@@ -3968,7 +3971,7 @@ repeat:
list_del_rcu(&pa->pa_inode_list);
spin_unlock(pa->pa_obj_lock);
- if (pa->pa_linear)
+ if (pa->pa_type == MB_GROUP_PA)
ext4_mb_release_group_pa(&e4b, pa, ac);
else
ext4_mb_release_inode_pa(&e4b, bitmap_bh, pa, ac);
@@ -4068,7 +4071,7 @@ repeat:
spin_unlock(&ei->i_prealloc_lock);
list_for_each_entry_safe(pa, tmp, &list, u.pa_tmp_list) {
- BUG_ON(pa->pa_linear != 0);
+ BUG_ON(pa->pa_type != MB_INODE_PA);
ext4_get_group_no_and_offset(sb, pa->pa_pstart, &group, NULL);
err = ext4_mb_load_buddy(sb, group, &e4b);
@@ -4320,7 +4323,7 @@ ext4_mb_discard_lg_preallocations(struct super_block *sb,
continue;
}
/* only lg prealloc space */
- BUG_ON(!pa->pa_linear);
+ BUG_ON(pa->pa_type != MB_GROUP_PA);
/* seems this one can be freed ... */
pa->pa_deleted = 1;
@@ -4426,7 +4429,7 @@ static int ext4_mb_release_context(struct ext4_allocation_context *ac)
{
struct ext4_prealloc_space *pa = ac->ac_pa;
if (pa) {
- if (pa->pa_linear) {
+ if (pa->pa_type == MB_GROUP_PA) {
/* see comment in ext4_mb_use_group_pa() */
spin_lock(&pa->pa_lock);
pa->pa_pstart += ac->ac_b_ex.fe_len;
@@ -4446,7 +4449,7 @@ static int ext4_mb_release_context(struct ext4_allocation_context *ac)
* doesn't grow big. We need to release
* alloc_semp before calling ext4_mb_add_n_trim()
*/
- if (pa->pa_linear && likely(pa->pa_free)) {
+ if ((pa->pa_type == MB_GROUP_PA) && likely(pa->pa_free)) {
spin_lock(pa->pa_obj_lock);
list_del_rcu(&pa->pa_inode_list);
spin_unlock(pa->pa_obj_lock);
diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h
index 7acf5ef24537..dd9e6cd5f6cf 100644
--- a/fs/ext4/mballoc.h
+++ b/fs/ext4/mballoc.h
@@ -132,12 +132,15 @@ struct ext4_prealloc_space {
ext4_lblk_t pa_lstart; /* log. block */
unsigned short pa_len; /* len of preallocated chunk */
unsigned short pa_free; /* how many blocks are free */
- unsigned short pa_linear; /* consumed in one direction
- * strictly, for grp prealloc */
+ unsigned short pa_type; /* pa type. inode or group */
spinlock_t *pa_obj_lock;
struct inode *pa_inode; /* hack, for history only */
};
+enum {
+ MB_INODE_PA = 0,
+ MB_GROUP_PA = 1
+};
struct ext4_free_extent {
ext4_lblk_t fe_logical;