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Date: Tue, 8 Dec 2015 22:25:41 +0800
From: Geliang Tang <geliangtang@....com>
To: "Richard Russon (FlatCap)" <ldm@...tcap.org>,
Jens Axboe <axboe@...nel.dk>
Cc: Geliang Tang <geliangtang@....com>,
linux-ntfs-dev@...ts.sourceforge.net, linux-block@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] LDM: use list_for_each_entry*
Use list_for_each_entry*() instead of list_for_each*() to simplify
the code. Fix coding style by the way.
Signed-off-by: Geliang Tang <geliangtang@....com>
---
block/partitions/ldm.c | 108 ++++++++++++++++++++++---------------------------
1 file changed, 49 insertions(+), 59 deletions(-)
diff --git a/block/partitions/ldm.c b/block/partitions/ldm.c
index e507cfb..3b86705 100644
--- a/block/partitions/ldm.c
+++ b/block/partitions/ldm.c
@@ -601,15 +601,14 @@ out:
* Return: Pointer, A matching vblk was found
* NULL, No match, or an error
*/
-static struct vblk * ldm_get_disk_objid (const struct ldmdb *ldb)
+static struct vblk *ldm_get_disk_objid(const struct ldmdb *ldb)
{
- struct list_head *item;
+ struct vblk *v;
- BUG_ON (!ldb);
+ BUG_ON(!ldb);
- list_for_each (item, &ldb->v_disk) {
- struct vblk *v = list_entry (item, struct vblk, list);
- if (!memcmp (v->vblk.disk.disk_id, ldb->ph.disk_id, GUID_SIZE))
+ list_for_each_entry(v, &ldb->v_disk, list) {
+ if (!memcmp(v->vblk.disk.disk_id, ldb->ph.disk_id, GUID_SIZE))
return v;
}
@@ -633,34 +632,32 @@ static struct vblk * ldm_get_disk_objid (const struct ldmdb *ldb)
* Return: 'true' Partition created
* 'false' Error, probably a range checking problem
*/
-static bool ldm_create_data_partitions (struct parsed_partitions *pp,
- const struct ldmdb *ldb)
+static bool ldm_create_data_partitions(struct parsed_partitions *pp,
+ const struct ldmdb *ldb)
{
- struct list_head *item;
struct vblk *vb;
struct vblk *disk;
struct vblk_part *part;
int part_num = 1;
- BUG_ON (!pp || !ldb);
+ BUG_ON(!pp || !ldb);
- disk = ldm_get_disk_objid (ldb);
+ disk = ldm_get_disk_objid(ldb);
if (!disk) {
- ldm_crit ("Can't find the ID of this disk in the database.");
+ ldm_crit("Can't find the ID of this disk in the database.");
return false;
}
strlcat(pp->pp_buf, " [LDM]", PAGE_SIZE);
/* Create the data partitions */
- list_for_each (item, &ldb->v_part) {
- vb = list_entry (item, struct vblk, list);
+ list_for_each_entry(vb, &ldb->v_part, list) {
part = &vb->vblk.part;
if (part->disk_id != disk->obj_id)
continue;
- put_partition (pp, part_num, ldb->ph.logical_disk_start +
+ put_partition(pp, part_num, ldb->ph.logical_disk_start +
part->start, part->size);
part_num++;
}
@@ -1231,20 +1228,19 @@ static bool ldm_parse_vblk (const u8 *buf, int len, struct vblk *vb)
* Return: 'true' The VBLK was added
* 'false' An error occurred
*/
-static bool ldm_ldmdb_add (u8 *data, int len, struct ldmdb *ldb)
+static bool ldm_ldmdb_add(u8 *data, int len, struct ldmdb *ldb)
{
- struct vblk *vb;
- struct list_head *item;
+ struct vblk *vb, *v;
- BUG_ON (!data || !ldb);
+ BUG_ON(!data || !ldb);
- vb = kmalloc (sizeof (*vb), GFP_KERNEL);
+ vb = kmalloc(sizeof(*vb), GFP_KERNEL);
if (!vb) {
- ldm_crit ("Out of memory.");
+ ldm_crit("Out of memory.");
return false;
}
- if (!ldm_parse_vblk (data, len, vb)) {
+ if (!ldm_parse_vblk(data, len, vb)) {
kfree(vb);
return false; /* Already logged */
}
@@ -1253,29 +1249,28 @@ static bool ldm_ldmdb_add (u8 *data, int len, struct ldmdb *ldb)
switch (vb->type) {
case VBLK_DGR3:
case VBLK_DGR4:
- list_add (&vb->list, &ldb->v_dgrp);
+ list_add(&vb->list, &ldb->v_dgrp);
break;
case VBLK_DSK3:
case VBLK_DSK4:
- list_add (&vb->list, &ldb->v_disk);
+ list_add(&vb->list, &ldb->v_disk);
break;
case VBLK_VOL5:
- list_add (&vb->list, &ldb->v_volu);
+ list_add(&vb->list, &ldb->v_volu);
break;
case VBLK_CMP3:
- list_add (&vb->list, &ldb->v_comp);
+ list_add(&vb->list, &ldb->v_comp);
break;
case VBLK_PRT3:
/* Sort by the partition's start sector. */
- list_for_each (item, &ldb->v_part) {
- struct vblk *v = list_entry (item, struct vblk, list);
+ list_for_each_entry(v, &ldb->v_part, list) {
if ((v->vblk.part.disk_id == vb->vblk.part.disk_id) &&
(v->vblk.part.start > vb->vblk.part.start)) {
- list_add_tail (&vb->list, &v->list);
+ list_add_tail(&vb->list, &v->list);
return true;
}
}
- list_add_tail (&vb->list, &ldb->v_part);
+ list_add_tail(&vb->list, &ldb->v_part);
break;
}
return true;
@@ -1293,13 +1288,12 @@ static bool ldm_ldmdb_add (u8 *data, int len, struct ldmdb *ldb)
* Return: 'true' Success, the VBLK was added to the list
* 'false' Error, a problem occurred
*/
-static bool ldm_frag_add (const u8 *data, int size, struct list_head *frags)
+static bool ldm_frag_add(const u8 *data, int size, struct list_head *frags)
{
struct frag *f;
- struct list_head *item;
int rec, num, group;
- BUG_ON (!data || !frags);
+ BUG_ON(!data || !frags);
if (size < 2 * VBLK_SIZE_HEAD) {
ldm_error("Value of size is to small.");
@@ -1310,7 +1304,7 @@ static bool ldm_frag_add (const u8 *data, int size, struct list_head *frags)
rec = get_unaligned_be16(data + 0x0C);
num = get_unaligned_be16(data + 0x0E);
if ((num < 1) || (num > 4)) {
- ldm_error ("A VBLK claims to have %d parts.", num);
+ ldm_error("A VBLK claims to have %d parts.", num);
return false;
}
if (rec >= num) {
@@ -1318,15 +1312,14 @@ static bool ldm_frag_add (const u8 *data, int size, struct list_head *frags)
return false;
}
- list_for_each (item, frags) {
- f = list_entry (item, struct frag, list);
+ list_for_each_entry(f, frags, list) {
if (f->group == group)
goto found;
}
- f = kmalloc (sizeof (*f) + size*num, GFP_KERNEL);
+ f = kmalloc(sizeof(*f) + size*num, GFP_KERNEL);
if (!f) {
- ldm_crit ("Out of memory.");
+ ldm_crit("Out of memory.");
return false;
}
@@ -1335,14 +1328,14 @@ static bool ldm_frag_add (const u8 *data, int size, struct list_head *frags)
f->rec = rec;
f->map = 0xFF << num;
- list_add_tail (&f->list, frags);
+ list_add_tail(&f->list, frags);
found:
if (rec >= f->num) {
ldm_error("REC value (%d) exceeds NUM value (%d)", rec, f->num);
return false;
}
if (f->map & (1 << rec)) {
- ldm_error ("Duplicate VBLK, part %d.", rec);
+ ldm_error("Duplicate VBLK, part %d.", rec);
f->map &= 0x7F; /* Mark the group as broken */
return false;
}
@@ -1357,20 +1350,20 @@ found:
/**
* ldm_frag_free - Free a linked list of VBLK fragments
- * @list: Linked list of fragments
+ * @lh: Linked list of fragments
*
* Free a linked list of VBLK fragments
*
* Return: none
*/
-static void ldm_frag_free (struct list_head *list)
+static void ldm_frag_free(struct list_head *lh)
{
- struct list_head *item, *tmp;
+ struct frag *f, *tmp;
- BUG_ON (!list);
+ BUG_ON(!lh);
- list_for_each_safe (item, tmp, list)
- kfree (list_entry (item, struct frag, list));
+ list_for_each_entry_safe(f, tmp, lh, list)
+ kfree(f);
}
/**
@@ -1384,23 +1377,20 @@ static void ldm_frag_free (struct list_head *list)
* Return: 'true' All the fragments we added successfully
* 'false' One or more of the fragments we invalid
*/
-static bool ldm_frag_commit (struct list_head *frags, struct ldmdb *ldb)
+static bool ldm_frag_commit(struct list_head *frags, struct ldmdb *ldb)
{
struct frag *f;
- struct list_head *item;
-
- BUG_ON (!frags || !ldb);
- list_for_each (item, frags) {
- f = list_entry (item, struct frag, list);
+ BUG_ON(!frags || !ldb);
+ list_for_each_entry(f, frags, list) {
if (f->map != 0xFF) {
- ldm_error ("VBLK group %d is incomplete (0x%02x).",
+ ldm_error("VBLK group %d is incomplete (0x%02x).",
f->group, f->map);
return false;
}
- if (!ldm_ldmdb_add (f->data, f->num*ldb->vm.vblk_size, ldb))
+ if (!ldm_ldmdb_add(f->data, f->num*ldb->vm.vblk_size, ldb))
return false; /* Already logged */
}
return true;
@@ -1478,14 +1468,14 @@ out:
*
* Return: none
*/
-static void ldm_free_vblks (struct list_head *lh)
+static void ldm_free_vblks(struct list_head *lh)
{
- struct list_head *item, *tmp;
+ struct vblk *v, *tmp;
- BUG_ON (!lh);
+ BUG_ON(!lh);
- list_for_each_safe (item, tmp, lh)
- kfree (list_entry (item, struct vblk, list));
+ list_for_each_entry_safe(v, tmp, lh, list)
+ kfree(v);
}
--
2.5.0
--
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