[GIT PULL] block fixes for 3.4 final
From: Jens Axboe
Date: Fri May 18 2012 - 08:31:27 EST
Hi Linus,
A few small, but important fixes. Most of them are marked
for stable as we..
- Fix failure to release a semaphore on error path in mtip32xx.
- Fix crashable condition in bio_get_nr_vecs().
- Don't mark end-of-disk buffers as mapped, limit it to
i_size.
- Fix for build problem with CONFIG_BLOCK=n on arm at least.
- Fix for a buffer overlow on UUID partition printing.
- Trivial removal of unused variables in dac960.
Please pull!
git://git.kernel.dk/linux-block.git for-linus
----------------------------------------------------------------
Asai Thambi S P (1):
mtip32xx: release the semaphore on an error path
Bernd Schubert (1):
bio allocation failure due to bio_get_nr_vecs()
Jeff Moyer (1):
block: don't mark buffers beyond end of disk as mapped
Jesper Juhl (1):
dac960: Remove unused variables from DAC960_CreateProcEntries()
Russell King (1):
Fix blkdev.h build errors when BLOCK=n
Tejun Heo (1):
block: fix buffer overflow when printing partition UUIDs
block/genhd.c | 10 ++++++----
drivers/block/DAC960.c | 23 ++++++++++-------------
drivers/block/mtip32xx/mtip32xx.c | 4 +++-
fs/bio.c | 7 ++++++-
fs/block_dev.c | 6 +++---
fs/buffer.c | 4 +++-
include/linux/blkdev.h | 3 ++-
include/linux/fs.h | 1 +
include/linux/genhd.h | 6 ------
9 files changed, 34 insertions(+), 30 deletions(-)
diff --git a/block/genhd.c b/block/genhd.c
index df9816e..9cf5583 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -743,7 +743,7 @@ void __init printk_all_partitions(void)
struct hd_struct *part;
char name_buf[BDEVNAME_SIZE];
char devt_buf[BDEVT_SIZE];
- u8 uuid[PARTITION_META_INFO_UUIDLTH * 2 + 1];
+ char uuid_buf[PARTITION_META_INFO_UUIDLTH * 2 + 5];
/*
* Don't show empty devices or things that have been
@@ -762,14 +762,16 @@ void __init printk_all_partitions(void)
while ((part = disk_part_iter_next(&piter))) {
bool is_part0 = part == &disk->part0;
- uuid[0] = 0;
+ uuid_buf[0] = '\0';
if (part->info)
- part_unpack_uuid(part->info->uuid, uuid);
+ snprintf(uuid_buf, sizeof(uuid_buf), "%pU",
+ part->info->uuid);
printk("%s%s %10llu %s %s", is_part0 ? "" : " ",
bdevt_str(part_devt(part), devt_buf),
(unsigned long long)part->nr_sects >> 1,
- disk_name(disk, part->partno, name_buf), uuid);
+ disk_name(disk, part->partno, name_buf),
+ uuid_buf);
if (is_part0) {
if (disk->driverfs_dev != NULL &&
disk->driverfs_dev->driver != NULL)
diff --git a/drivers/block/DAC960.c b/drivers/block/DAC960.c
index 8db9089..9a13e88 100644
--- a/drivers/block/DAC960.c
+++ b/drivers/block/DAC960.c
@@ -6580,24 +6580,21 @@ static const struct file_operations dac960_user_command_proc_fops = {
static void DAC960_CreateProcEntries(DAC960_Controller_T *Controller)
{
- struct proc_dir_entry *StatusProcEntry;
struct proc_dir_entry *ControllerProcEntry;
- struct proc_dir_entry *UserCommandProcEntry;
if (DAC960_ProcDirectoryEntry == NULL) {
- DAC960_ProcDirectoryEntry = proc_mkdir("rd", NULL);
- StatusProcEntry = proc_create("status", 0,
- DAC960_ProcDirectoryEntry,
- &dac960_proc_fops);
+ DAC960_ProcDirectoryEntry = proc_mkdir("rd", NULL);
+ proc_create("status", 0, DAC960_ProcDirectoryEntry,
+ &dac960_proc_fops);
}
- sprintf(Controller->ControllerName, "c%d", Controller->ControllerNumber);
- ControllerProcEntry = proc_mkdir(Controller->ControllerName,
- DAC960_ProcDirectoryEntry);
- proc_create_data("initial_status", 0, ControllerProcEntry, &dac960_initial_status_proc_fops, Controller);
- proc_create_data("current_status", 0, ControllerProcEntry, &dac960_current_status_proc_fops, Controller);
- UserCommandProcEntry = proc_create_data("user_command", S_IWUSR | S_IRUSR, ControllerProcEntry, &dac960_user_command_proc_fops, Controller);
- Controller->ControllerProcEntry = ControllerProcEntry;
+ sprintf(Controller->ControllerName, "c%d", Controller->ControllerNumber);
+ ControllerProcEntry = proc_mkdir(Controller->ControllerName,
+ DAC960_ProcDirectoryEntry);
+ proc_create_data("initial_status", 0, ControllerProcEntry, &dac960_initial_status_proc_fops, Controller);
+ proc_create_data("current_status", 0, ControllerProcEntry, &dac960_current_status_proc_fops, Controller);
+ proc_create_data("user_command", S_IWUSR | S_IRUSR, ControllerProcEntry, &dac960_user_command_proc_fops, Controller);
+ Controller->ControllerProcEntry = ControllerProcEntry;
}
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index 00f9fc9..304000c 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -2510,8 +2510,10 @@ static struct scatterlist *mtip_hw_get_scatterlist(struct driver_data *dd,
up(&dd->port->cmd_slot);
return NULL;
}
- if (unlikely(*tag < 0))
+ if (unlikely(*tag < 0)) {
+ up(&dd->port->cmd_slot);
return NULL;
+ }
return dd->port->commands[*tag].sg;
}
diff --git a/fs/bio.c b/fs/bio.c
index e453924..84da885 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -505,9 +505,14 @@ EXPORT_SYMBOL(bio_clone);
int bio_get_nr_vecs(struct block_device *bdev)
{
struct request_queue *q = bdev_get_queue(bdev);
- return min_t(unsigned,
+ int nr_pages;
+
+ nr_pages = min_t(unsigned,
queue_max_segments(q),
queue_max_sectors(q) / (PAGE_SIZE >> 9) + 1);
+
+ return min_t(unsigned, nr_pages, BIO_MAX_PAGES);
+
}
EXPORT_SYMBOL(bio_get_nr_vecs);
diff --git a/fs/block_dev.c b/fs/block_dev.c
index e08f6a20..ba11c30 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -70,7 +70,7 @@ static void bdev_inode_switch_bdi(struct inode *inode,
spin_unlock(&dst->wb.list_lock);
}
-static sector_t max_block(struct block_device *bdev)
+sector_t blkdev_max_block(struct block_device *bdev)
{
sector_t retval = ~((sector_t)0);
loff_t sz = i_size_read(bdev->bd_inode);
@@ -163,7 +163,7 @@ static int
blkdev_get_block(struct inode *inode, sector_t iblock,
struct buffer_head *bh, int create)
{
- if (iblock >= max_block(I_BDEV(inode))) {
+ if (iblock >= blkdev_max_block(I_BDEV(inode))) {
if (create)
return -EIO;
@@ -185,7 +185,7 @@ static int
blkdev_get_blocks(struct inode *inode, sector_t iblock,
struct buffer_head *bh, int create)
{
- sector_t end_block = max_block(I_BDEV(inode));
+ sector_t end_block = blkdev_max_block(I_BDEV(inode));
unsigned long max_blocks = bh->b_size >> inode->i_blkbits;
if ((iblock + max_blocks) > end_block) {
diff --git a/fs/buffer.c b/fs/buffer.c
index 351e18e..ad5938c 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -921,6 +921,7 @@ init_page_buffers(struct page *page, struct block_device *bdev,
struct buffer_head *head = page_buffers(page);
struct buffer_head *bh = head;
int uptodate = PageUptodate(page);
+ sector_t end_block = blkdev_max_block(I_BDEV(bdev->bd_inode));
do {
if (!buffer_mapped(bh)) {
@@ -929,7 +930,8 @@ init_page_buffers(struct page *page, struct block_device *bdev,
bh->b_blocknr = block;
if (uptodate)
set_buffer_uptodate(bh);
- set_buffer_mapped(bh);
+ if (block < end_block)
+ set_buffer_mapped(bh);
}
block++;
bh = bh->b_this_page;
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 2aa2466..4d4ac24 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1,9 +1,10 @@
#ifndef _LINUX_BLKDEV_H
#define _LINUX_BLKDEV_H
+#include <linux/sched.h>
+
#ifdef CONFIG_BLOCK
-#include <linux/sched.h>
#include <linux/major.h>
#include <linux/genhd.h>
#include <linux/list.h>
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 8de6755..25c40b9 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2051,6 +2051,7 @@ extern void unregister_blkdev(unsigned int, const char *);
extern struct block_device *bdget(dev_t);
extern struct block_device *bdgrab(struct block_device *bdev);
extern void bd_set_size(struct block_device *, loff_t size);
+extern sector_t blkdev_max_block(struct block_device *bdev);
extern void bd_forget(struct inode *inode);
extern void bdput(struct block_device *);
extern void invalidate_bdev(struct block_device *);
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index e61d319..017a7fb 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -222,12 +222,6 @@ static inline void part_pack_uuid(const u8 *uuid_str, u8 *to)
}
}
-static inline char *part_unpack_uuid(const u8 *uuid, char *out)
-{
- sprintf(out, "%pU", uuid);
- return out;
-}
-
static inline int disk_max_parts(struct gendisk *disk)
{
if (disk->flags & GENHD_FL_EXT_DEVT)
--
Jens Axboe
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