In preparation for making bitmap fields configurable via sysfs,
start tidying up by making a single structure to contain the
configuration fields.
Signed-off-by: NeilBrown <neilb@xxxxxxx>
---
drivers/md/bitmap.c | 8 +++--
drivers/md/md.c | 75 +++++++++++++++++++++++++++------------------------
drivers/md/md.h | 21 +++++++-------
3 files changed, 54 insertions(+), 50 deletions(-)
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index a39f632..4c70a01 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -1610,16 +1610,16 @@ int bitmap_create(mddev_t *mddev)
sector_t blocks = mddev->resync_max_sectors;
unsigned long chunks;
unsigned long pages;
- struct file *file = mddev->bitmap_file;
+ struct file *file = mddev->bitmap_info.file;
int err;
sector_t start;
BUILD_BUG_ON(sizeof(bitmap_super_t) != 256);
- if (!file && !mddev->bitmap_offset) /* bitmap disabled, nothing to do */
+ if (!file && !mddev->bitmap_info.offset) /* bitmap disabled, nothing to do */
return 0;
- BUG_ON(file && mddev->bitmap_offset);
+ BUG_ON(file && mddev->bitmap_info.offset);
bitmap = kzalloc(sizeof(*bitmap), GFP_KERNEL);
if (!bitmap)
@@ -1633,7 +1633,7 @@ int bitmap_create(mddev_t *mddev)
bitmap->mddev = mddev;
bitmap->file = file;
- bitmap->offset = mddev->bitmap_offset;
+ bitmap->offset = mddev->bitmap_info.offset;
if (file) {
get_file(file);
/* As future accesses to this file will use bmap,
diff --git a/drivers/md/md.c b/drivers/md/md.c
index ffe92db..b989189 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -865,7 +865,7 @@ struct super_type {
*/
int md_check_no_bitmap(mddev_t *mddev)
{
- if (!mddev->bitmap_file && !mddev->bitmap_offset)
+ if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset)
return 0;
printk(KERN_ERR "%s: bitmaps are not supported for %s\n",
mdname(mddev), mddev->pers->name);
@@ -993,8 +993,8 @@ static int super_90_validate(mddev_t *mddev, mdk_rdev_t *rdev)
mddev->raid_disks = sb->raid_disks;
mddev->dev_sectors = sb->size * 2;
mddev->events = ev1;
- mddev->bitmap_offset = 0;
- mddev->default_bitmap_offset = MD_SB_BYTES >> 9;
+ mddev->bitmap_info.offset = 0;
+ mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9;
if (mddev->minor_version >= 91) {
mddev->reshape_position = sb->reshape_position;
@@ -1028,8 +1028,9 @@ static int super_90_validate(mddev_t *mddev, mdk_rdev_t *rdev)
mddev->max_disks = MD_SB_DISKS;
if (sb->state & (1<<MD_SB_BITMAP_PRESENT) &&
- mddev->bitmap_file == NULL)
- mddev->bitmap_offset = mddev->default_bitmap_offset;
+ mddev->bitmap_info.file == NULL)
+ mddev->bitmap_info.offset =
+ mddev->bitmap_info.default_offset;
} else if (mddev->pers == NULL) {
/* Insist on good event counter while assembling */
@@ -1146,7 +1147,7 @@ static void super_90_sync(mddev_t *mddev, mdk_rdev_t *rdev)
sb->layout = mddev->layout;
sb->chunk_size = mddev->chunk_sectors << 9;
- if (mddev->bitmap && mddev->bitmap_file == NULL)
+ if (mddev->bitmap && mddev->bitmap_info.file == NULL)
sb->state |= (1<<MD_SB_BITMAP_PRESENT);
sb->disks[0].state = (1<<MD_DISK_REMOVED);
@@ -1224,7 +1225,7 @@ super_90_rdev_size_change(mdk_rdev_t *rdev, sector_t num_sectors)
{
if (num_sectors && num_sectors < rdev->mddev->dev_sectors)
return 0; /* component must fit device */
- if (rdev->mddev->bitmap_offset)
+ if (rdev->mddev->bitmap_info.offset)
return 0; /* can't move bitmap */
rdev->sb_start = calc_dev_sboffset(rdev->bdev);
if (!num_sectors || num_sectors > rdev->sb_start)
@@ -1403,8 +1404,8 @@ static int super_1_validate(mddev_t *mddev, mdk_rdev_t *rdev)
mddev->raid_disks = le32_to_cpu(sb->raid_disks);
mddev->dev_sectors = le64_to_cpu(sb->size);
mddev->events = ev1;
- mddev->bitmap_offset = 0;
- mddev->default_bitmap_offset = 1024 >> 9;
+ mddev->bitmap_info.offset = 0;
+ mddev->bitmap_info.default_offset = 1024 >> 9;
mddev->recovery_cp = le64_to_cpu(sb->resync_offset);
memcpy(mddev->uuid, sb->set_uuid, 16);
@@ -1412,8 +1413,9 @@ static int super_1_validate(mddev_t *mddev, mdk_rdev_t *rdev)
mddev->max_disks = (4096-256)/2;
if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) &&
- mddev->bitmap_file == NULL )
- mddev->bitmap_offset = (__s32)le32_to_cpu(sb->bitmap_offset);
+ mddev->bitmap_info.file == NULL )
+ mddev->bitmap_info.offset =
+ (__s32)le32_to_cpu(sb->bitmap_offset);
if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) {
mddev->reshape_position = le64_to_cpu(sb->reshape_position);
@@ -1507,8 +1509,8 @@ static void super_1_sync(mddev_t *mddev, mdk_rdev_t *rdev)
sb->level = cpu_to_le32(mddev->level);
sb->layout = cpu_to_le32(mddev->layout);
- if (mddev->bitmap && mddev->bitmap_file == NULL) {
- sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_offset);
+ if (mddev->bitmap && mddev->bitmap_info.file == NULL) {
+ sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset);
sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET);
}
@@ -1575,7 +1577,7 @@ super_1_rdev_size_change(mdk_rdev_t *rdev, sector_t num_sectors)
max_sectors -= rdev->data_offset;
if (!num_sectors || num_sectors > max_sectors)
num_sectors = max_sectors;
- } else if (rdev->mddev->bitmap_offset) {
+ } else if (rdev->mddev->bitmap_info.offset) {
/* minor version 0 with bitmap we can't move */
return 0;
} else {
@@ -4522,12 +4524,12 @@ out:
printk(KERN_INFO "md: %s stopped.\n", mdname(mddev));
bitmap_destroy(mddev);
- if (mddev->bitmap_file) {
- restore_bitmap_write_access(mddev->bitmap_file);
- fput(mddev->bitmap_file);
- mddev->bitmap_file = NULL;
+ if (mddev->bitmap_info.file) {
+ restore_bitmap_write_access(mddev->bitmap_info.file);
+ fput(mddev->bitmap_info.file);
+ mddev->bitmap_info.file = NULL;
}
- mddev->bitmap_offset = 0;
+ mddev->bitmap_info.offset = 0;
/* make sure all md_delayed_delete calls have finished */
flush_scheduled_work();
@@ -4753,7 +4755,7 @@ static int get_array_info(mddev_t * mddev, void __user * arg)
info.state = 0;
if (mddev->in_sync)
info.state = (1<<MD_SB_CLEAN);
- if (mddev->bitmap && mddev->bitmap_offset)
+ if (mddev->bitmap && mddev->bitmap_info.offset)
info.state = (1<<MD_SB_BITMAP_PRESENT);
info.active_disks = insync;
info.working_disks = working;
@@ -5111,23 +5113,23 @@ static int set_bitmap_file(mddev_t *mddev, int fd)
if (fd >= 0) {
if (mddev->bitmap)
return -EEXIST; /* cannot add when bitmap is present */
- mddev->bitmap_file = fget(fd);
+ mddev->bitmap_info.file = fget(fd);
- if (mddev->bitmap_file == NULL) {
+ if (mddev->bitmap_info.file == NULL) {
printk(KERN_ERR "%s: error: failed to get bitmap file\n",
mdname(mddev));
return -EBADF;
}
- err = deny_bitmap_write_access(mddev->bitmap_file);
+ err = deny_bitmap_write_access(mddev->bitmap_info.file);
if (err) {
printk(KERN_ERR "%s: error: bitmap file is already in use\n",
mdname(mddev));
- fput(mddev->bitmap_file);
- mddev->bitmap_file = NULL;
+ fput(mddev->bitmap_info.file);
+ mddev->bitmap_info.file = NULL;
return err;
}
- mddev->bitmap_offset = 0; /* file overrides offset */
+ mddev->bitmap_info.offset = 0; /* file overrides offset */
} else if (mddev->bitmap == NULL)
return -ENOENT; /* cannot remove what isn't there */
err = 0;
@@ -5142,11 +5144,11 @@ static int set_bitmap_file(mddev_t *mddev, int fd)
mddev->pers->quiesce(mddev, 0);
}
if (fd < 0) {
- if (mddev->bitmap_file) {
- restore_bitmap_write_access(mddev->bitmap_file);
- fput(mddev->bitmap_file);
+ if (mddev->bitmap_info.file) {
+ restore_bitmap_write_access(mddev->bitmap_info.file);
+ fput(mddev->bitmap_info.file);
}
- mddev->bitmap_file = NULL;
+ mddev->bitmap_info.file = NULL;
}
return err;
@@ -5213,8 +5215,8 @@ static int set_array_info(mddev_t * mddev, mdu_array_info_t *info)
mddev->flags = 0;
set_bit(MD_CHANGE_DEVS, &mddev->flags);
- mddev->default_bitmap_offset = MD_SB_BYTES >> 9;
- mddev->bitmap_offset = 0;
+ mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9;
+ mddev->bitmap_info.offset = 0;
mddev->reshape_position = MaxSector;
@@ -5314,7 +5316,7 @@ static int update_array_info(mddev_t *mddev, mdu_array_info_t *info)
int state = 0;
/* calculate expected state,ignoring low bits */
- if (mddev->bitmap && mddev->bitmap_offset)
+ if (mddev->bitmap && mddev->bitmap_info.offset)
state |= (1 << MD_SB_BITMAP_PRESENT);
if (mddev->major_version != info->major_version ||
@@ -5373,9 +5375,10 @@ static int update_array_info(mddev_t *mddev, mdu_array_info_t *info)
/* add the bitmap */
if (mddev->bitmap)
return -EEXIST;
- if (mddev->default_bitmap_offset == 0)
+ if (mddev->bitmap_info.default_offset == 0)
return -EINVAL;
- mddev->bitmap_offset = mddev->default_bitmap_offset;
+ mddev->bitmap_info.offset =
+ mddev->bitmap_info.default_offset;
mddev->pers->quiesce(mddev, 1);
rv = bitmap_create(mddev);
if (rv)
@@ -5390,7 +5393,7 @@ static int update_array_info(mddev_t *mddev, mdu_array_info_t *info)
mddev->pers->quiesce(mddev, 1);
bitmap_destroy(mddev);
mddev->pers->quiesce(mddev, 0);
- mddev->bitmap_offset = 0;
+ mddev->bitmap_info.offset = 0;
}
}
md_update_sb(mddev, 1);
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 77f0aad..94a8e51 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -280,16 +280,17 @@ struct mddev_s
unsigned int max_write_behind; /* 0 = sync */
struct bitmap *bitmap; /* the bitmap for the device */
- struct file *bitmap_file; /* the bitmap file */
- long bitmap_offset; /* offset from superblock of
- * start of bitmap. May be
- * negative, but not '0'
- */
- long default_bitmap_offset; /* this is the offset to use when
- * hot-adding a bitmap. It should
- * eventually be settable by sysfs.
- */
-
+ struct {
+ struct file *file; /* the bitmap file */
+ long offset; /* offset from superblock of
+ * start of bitmap. May be
+ * negative, but not '0'
+ */
+ long default_offset; /* this is the offset to use when
+ * hot-adding a bitmap. It should
+ * eventually be settable by sysfs.
+ */
+ } bitmap_info;
struct list_head all_mddevs;
/* Generic barrier handling.
--
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