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authorAl Viro <viro@zeniv.linux.org.uk>2008-02-22 19:50:45 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2008-10-21 07:49:00 -0400
commit30c40d2c01f68c7eb1a41ab3552bdaf5dbf300d4 (patch)
tree38b69a80c4c0df13ef3b905f5195f6cadf930223
parent9a1c3542768b5a58e45a9216921cd10a3bae1205 (diff)
downloadlinux-linaro-30c40d2c01f68c7eb1a41ab3552bdaf5dbf300d4.tar.gz
[PATCH] propagate mode through open_bdev_excl/close_bdev_excl
replace open_bdev_excl/close_bdev_excl with variants taking fmode_t. superblock gets the value used to mount it stored in sb->s_mode Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--drivers/mtd/devices/block2mtd.c4
-rw-r--r--fs/block_dev.c24
-rw-r--r--fs/reiserfs/journal.c3
-rw-r--r--fs/super.c14
-rw-r--r--fs/xfs/linux-2.6/xfs_super.c4
-rw-r--r--include/linux/fs.h6
6 files changed, 31 insertions, 24 deletions
diff --git a/drivers/mtd/devices/block2mtd.c b/drivers/mtd/devices/block2mtd.c
index 91fbba76763..8c295f40d2a 100644
--- a/drivers/mtd/devices/block2mtd.c
+++ b/drivers/mtd/devices/block2mtd.c
@@ -224,7 +224,7 @@ static void block2mtd_free_device(struct block2mtd_dev *dev)
if (dev->blkdev) {
invalidate_mapping_pages(dev->blkdev->bd_inode->i_mapping,
0, -1);
- close_bdev_excl(dev->blkdev);
+ close_bdev_exclusive(dev->blkdev, FMODE_READ|FMODE_WRITE);
}
kfree(dev);
@@ -246,7 +246,7 @@ static struct block2mtd_dev *add_device(char *devname, int erase_size)
return NULL;
/* Get a handle on the device */
- bdev = open_bdev_excl(devname, O_RDWR, NULL);
+ bdev = open_bdev_exclusive(devname, FMODE_READ|FMODE_WRITE, NULL);
#ifndef MODULE
if (IS_ERR(bdev)) {
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 05131baf3cf..4b595904cef 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1309,32 +1309,29 @@ fail:
EXPORT_SYMBOL(lookup_bdev);
/**
- * open_bdev_excl - open a block device by name and set it up for use
+ * open_bdev_exclusive - open a block device by name and set it up for use
*
* @path: special file representing the block device
- * @flags: %MS_RDONLY for opening read-only
+ * @mode: FMODE_... combination to pass be used
* @holder: owner for exclusion
*
* Open the blockdevice described by the special file at @path, claim it
* for the @holder.
*/
-struct block_device *open_bdev_excl(const char *path, int flags, void *holder)
+struct block_device *open_bdev_exclusive(const char *path, fmode_t mode, void *holder)
{
struct block_device *bdev;
- fmode_t mode = FMODE_READ;
int error = 0;
bdev = lookup_bdev(path);
if (IS_ERR(bdev))
return bdev;
- if (!(flags & MS_RDONLY))
- mode |= FMODE_WRITE;
error = blkdev_get(bdev, mode, 0);
if (error)
return ERR_PTR(error);
error = -EACCES;
- if (!(flags & MS_RDONLY) && bdev_read_only(bdev))
+ if ((mode & FMODE_WRITE) && bdev_read_only(bdev))
goto blkdev_put;
error = bd_claim(bdev, holder);
if (error)
@@ -1347,22 +1344,23 @@ blkdev_put:
return ERR_PTR(error);
}
-EXPORT_SYMBOL(open_bdev_excl);
+EXPORT_SYMBOL(open_bdev_exclusive);
/**
- * close_bdev_excl - release a blockdevice openen by open_bdev_excl()
+ * close_bdev_exclusive - close a blockdevice opened by open_bdev_exclusive()
*
* @bdev: blockdevice to close
+ * @mode: mode, must match that used to open.
*
- * This is the counterpart to open_bdev_excl().
+ * This is the counterpart to open_bdev_exclusive().
*/
-void close_bdev_excl(struct block_device *bdev)
+void close_bdev_exclusive(struct block_device *bdev, fmode_t mode)
{
bd_release(bdev);
- blkdev_put(bdev, 0); /* move up in the next patches */
+ blkdev_put(bdev, mode);
}
-EXPORT_SYMBOL(close_bdev_excl);
+EXPORT_SYMBOL(close_bdev_exclusive);
int __invalidate_device(struct block_device *bdev)
{
diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c
index 3261518478f..70b89607667 100644
--- a/fs/reiserfs/journal.c
+++ b/fs/reiserfs/journal.c
@@ -2628,7 +2628,8 @@ static int journal_init_dev(struct super_block *super,
return 0;
}
- journal->j_dev_bd = open_bdev_excl(jdev_name, 0, journal);
+ journal->j_dev_bd = open_bdev_exclusive(jdev_name,
+ FMODE_READ|FMODE_WRITE, journal);
if (IS_ERR(journal->j_dev_bd)) {
result = PTR_ERR(journal->j_dev_bd);
journal->j_dev_bd = NULL;
diff --git a/fs/super.c b/fs/super.c
index e931ae9511f..0d77ac20d03 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -760,9 +760,13 @@ int get_sb_bdev(struct file_system_type *fs_type,
{
struct block_device *bdev;
struct super_block *s;
+ fmode_t mode = FMODE_READ;
int error = 0;
- bdev = open_bdev_excl(dev_name, flags, fs_type);
+ if (!(flags & MS_RDONLY))
+ mode |= FMODE_WRITE;
+
+ bdev = open_bdev_exclusive(dev_name, mode, fs_type);
if (IS_ERR(bdev))
return PTR_ERR(bdev);
@@ -785,11 +789,12 @@ int get_sb_bdev(struct file_system_type *fs_type,
goto error_bdev;
}
- close_bdev_excl(bdev);
+ close_bdev_exclusive(bdev, mode);
} else {
char b[BDEVNAME_SIZE];
s->s_flags = flags;
+ s->s_mode = mode;
strlcpy(s->s_id, bdevname(bdev, b), sizeof(s->s_id));
sb_set_blocksize(s, block_size(bdev));
error = fill_super(s, data, flags & MS_SILENT ? 1 : 0);
@@ -807,7 +812,7 @@ int get_sb_bdev(struct file_system_type *fs_type,
error_s:
error = PTR_ERR(s);
error_bdev:
- close_bdev_excl(bdev);
+ close_bdev_exclusive(bdev, mode);
error:
return error;
}
@@ -817,10 +822,11 @@ EXPORT_SYMBOL(get_sb_bdev);
void kill_block_super(struct super_block *sb)
{
struct block_device *bdev = sb->s_bdev;
+ fmode_t mode = sb->s_mode;
generic_shutdown_super(sb);
sync_blockdev(bdev);
- close_bdev_excl(bdev);
+ close_bdev_exclusive(bdev, mode);
}
EXPORT_SYMBOL(kill_block_super);
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index e39013619b2..37ebe36056e 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -589,7 +589,7 @@ xfs_blkdev_get(
{
int error = 0;
- *bdevp = open_bdev_excl(name, 0, mp);
+ *bdevp = open_bdev_exclusive(name, FMODE_READ|FMODE_WRITE, mp);
if (IS_ERR(*bdevp)) {
error = PTR_ERR(*bdevp);
printk("XFS: Invalid device [%s], error=%d\n", name, error);
@@ -603,7 +603,7 @@ xfs_blkdev_put(
struct block_device *bdev)
{
if (bdev)
- close_bdev_excl(bdev);
+ close_bdev_exclusive(bdev, FMODE_READ|FMODE_WRITE);
}
/*
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 04c8dc41f45..c6766314dc5 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1157,6 +1157,7 @@ struct super_block {
char s_id[32]; /* Informational name */
void *s_fs_info; /* Filesystem private info */
+ fmode_t s_mode;
/*
* The next field is for VFS *only*. No filesystems have any business
@@ -1753,9 +1754,10 @@ extern void chrdev_show(struct seq_file *,off_t);
extern const char *__bdevname(dev_t, char *buffer);
extern const char *bdevname(struct block_device *bdev, char *buffer);
extern struct block_device *lookup_bdev(const char *);
-extern struct block_device *open_bdev_excl(const char *, int, void *);
-extern void close_bdev_excl(struct block_device *);
+extern struct block_device *open_bdev_exclusive(const char *, fmode_t, void *);
+extern void close_bdev_exclusive(struct block_device *, fmode_t);
extern void blkdev_show(struct seq_file *,off_t);
+
#else
#define BLKDEV_MAJOR_HASH_SIZE 0
#endif