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authorWill Drewry <wad@chromium.org>2010-09-01 00:47:05 +0400
committerJens Axboe <jaxboe@fusionio.com>2010-09-15 18:13:18 +0400
commit6d1d8050b4bc89d0165d29b58e894aeba2564a97 (patch)
treeb5c5b730bd7b80fe9041c031a6fcf08f42fff0d5 /fs/partitions
parent144177991ca624841ddbd1e7edff958fc0f6d1fe (diff)
downloadlinux-6d1d8050b4bc89d0165d29b58e894aeba2564a97.tar.xz
block, partition: add partition_meta_info to hd_struct
I'm reposting this patch series as v4 since there have been no additional comments, and I cleaned up one extra bit of unneeded code (in 3/3). The patches are against Linus's tree: 2bfc96a127bc1cc94d26bfaa40159966064f9c8c (2.6.36-rc3). Would this patchset be suitable for inclusion in an mm branch? This changes adds a partition_meta_info struct which itself contains a union of structures that provide partition table specific metadata. This change leaves the union empty. The subsequent patch includes an implementation for CONFIG_EFI_PARTITION-based metadata. Signed-off-by: Will Drewry <wad@chromium.org> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'fs/partitions')
-rw-r--r--fs/partitions/check.c23
-rw-r--r--fs/partitions/check.h3
2 files changed, 23 insertions, 3 deletions
diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index 79fbf3f390f0..6dfbee03ccc6 100644
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -352,6 +352,7 @@ static void part_release(struct device *dev)
{
struct hd_struct *p = dev_to_part(dev);
free_part_stats(p);
+ free_part_info(p);
kfree(p);
}
@@ -401,7 +402,8 @@ static DEVICE_ATTR(whole_disk, S_IRUSR | S_IRGRP | S_IROTH,
whole_disk_show, NULL);
struct hd_struct *add_partition(struct gendisk *disk, int partno,
- sector_t start, sector_t len, int flags)
+ sector_t start, sector_t len, int flags,
+ struct partition_meta_info *info)
{
struct hd_struct *p;
dev_t devt = MKDEV(0, 0);
@@ -438,6 +440,14 @@ struct hd_struct *add_partition(struct gendisk *disk, int partno,
p->partno = partno;
p->policy = get_disk_ro(disk);
+ if (info) {
+ struct partition_meta_info *pinfo = alloc_part_info(disk);
+ if (!pinfo)
+ goto out_free_stats;
+ memcpy(pinfo, info, sizeof(*info));
+ p->info = pinfo;
+ }
+
dname = dev_name(ddev);
if (isdigit(dname[strlen(dname) - 1]))
dev_set_name(pdev, "%sp%d", dname, partno);
@@ -451,7 +461,7 @@ struct hd_struct *add_partition(struct gendisk *disk, int partno,
err = blk_alloc_devt(p, &devt);
if (err)
- goto out_free_stats;
+ goto out_free_info;
pdev->devt = devt;
/* delay uevent until 'holders' subdir is created */
@@ -481,6 +491,8 @@ struct hd_struct *add_partition(struct gendisk *disk, int partno,
return p;
+out_free_info:
+ free_part_info(p);
out_free_stats:
free_part_stats(p);
out_free:
@@ -642,6 +654,7 @@ rescan:
/* add partitions */
for (p = 1; p < state->limit; p++) {
sector_t size, from;
+ struct partition_meta_info *info = NULL;
size = state->parts[p].size;
if (!size)
@@ -675,8 +688,12 @@ rescan:
size = get_capacity(disk) - from;
}
}
+
+ if (state->parts[p].has_info)
+ info = &state->parts[p].info;
part = add_partition(disk, p, from, size,
- state->parts[p].flags);
+ state->parts[p].flags,
+ &state->parts[p].info);
if (IS_ERR(part)) {
printk(KERN_ERR " %s: p%d could not be added: %ld\n",
disk->disk_name, p, -PTR_ERR(part));
diff --git a/fs/partitions/check.h b/fs/partitions/check.h
index 8e4e103ba216..d68bf4dc3bc2 100644
--- a/fs/partitions/check.h
+++ b/fs/partitions/check.h
@@ -1,5 +1,6 @@
#include <linux/pagemap.h>
#include <linux/blkdev.h>
+#include <linux/genhd.h>
/*
* add_gd_partition adds a partitions details to the devices partition
@@ -12,6 +13,8 @@ struct parsed_partitions {
sector_t from;
sector_t size;
int flags;
+ bool has_info;
+ struct partition_meta_info info;
} parts[DISK_MAX_PARTS];
int next;
int limit;