From: Anand Jain <anand.jain@oracle.com>
To: linux-btrfs@vger.kernel.org
Subject: [PATCH v2 2/4] btrfs: save latest btrfs_device instead of its block_device in fs_devices
Date: Fri, 20 Aug 2021 17:54:10 +0800 [thread overview]
Message-ID: <61d6dafaff6a119f56782fb35b2374411585b634.1629452691.git.anand.jain@oracle.com> (raw)
In-Reply-To: <cover.1629452691.git.anand.jain@oracle.com>
In preparation to fix a bug in btrfs_show_devname(), save the device with
the largest generation in fs_devices instead of just its bdev (as of
now). So that btrfs_show_devname() can read device's name.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
v2: born
fs/btrfs/disk-io.c | 6 +++---
fs/btrfs/extent_io.c | 2 +-
fs/btrfs/inode.c | 2 +-
fs/btrfs/procfs.c | 6 +++---
fs/btrfs/super.c | 2 +-
fs/btrfs/volumes.c | 10 +++++-----
fs/btrfs/volumes.h | 2 +-
7 files changed, 15 insertions(+), 15 deletions(-)
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 1052437cec64..c0d2c093b874 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3228,12 +3228,12 @@ int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_device
mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS);
btrfs_init_btree_inode(fs_info);
- invalidate_bdev(fs_devices->latest_bdev);
+ invalidate_bdev(fs_devices->latest_dev->bdev);
/*
* Read super block and check the signature bytes only
*/
- disk_super = btrfs_read_dev_super(fs_devices->latest_bdev);
+ disk_super = btrfs_read_dev_super(fs_devices->latest_dev->bdev);
if (IS_ERR(disk_super)) {
err = PTR_ERR(disk_super);
goto fail_alloc;
@@ -3466,7 +3466,7 @@ int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_device
* below in btrfs_init_dev_replace().
*/
btrfs_free_extra_devids(fs_devices);
- if (!fs_devices->latest_bdev) {
+ if (!fs_devices->latest_dev->bdev) {
btrfs_err(fs_info, "failed to read devices");
goto fail_tree_roots;
}
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index aaddd7225348..edf0162c9020 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3327,7 +3327,7 @@ static int alloc_new_bio(struct btrfs_inode *inode,
if (wbc) {
struct block_device *bdev;
- bdev = fs_info->fs_devices->latest_bdev;
+ bdev = fs_info->fs_devices->latest_dev->bdev;
bio_set_dev(bio, bdev);
wbc_init_bio(wbc, bio);
}
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 2aa9646bce56..ceedcd54e6d2 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -7961,7 +7961,7 @@ static int btrfs_dio_iomap_begin(struct inode *inode, loff_t start,
iomap->type = IOMAP_MAPPED;
}
iomap->offset = start;
- iomap->bdev = fs_info->fs_devices->latest_bdev;
+ iomap->bdev = fs_info->fs_devices->latest_dev->bdev;
iomap->length = len;
if (write && btrfs_use_zone_append(BTRFS_I(inode), em->block_start))
diff --git a/fs/btrfs/procfs.c b/fs/btrfs/procfs.c
index 30eaeca07aeb..2c3bb474c28f 100644
--- a/fs/btrfs/procfs.c
+++ b/fs/btrfs/procfs.c
@@ -291,9 +291,9 @@ void btrfs_print_fsinfo(struct seq_file *seq)
bdevname(fs_info->sb->s_bdev, b) :
"null");
BTRFS_SEQ_PRINT2("\tlatest_bdev:\t\t%s\n",
- fs_devices->latest_bdev ?
- bdevname(fs_devices->latest_bdev, b) :
- "null");
+ fs_devices->latest_dev->bdev ?
+ bdevname(fs_devices->latest_dev->bdev, b) :
+ "null");
fs_state_to_str(fs_info, fs_str);
BTRFS_SEQ_PRINT2("\tfs_state:\t\t%s\n", fs_str);
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 1f9dd1a4faa3..64ecbdb50c1a 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1706,7 +1706,7 @@ static struct dentry *btrfs_mount_root(struct file_system_type *fs_type,
goto error_close_devices;
}
- bdev = fs_devices->latest_bdev;
+ bdev = fs_devices->latest_dev->bdev;
s = sget(fs_type, btrfs_test_super, btrfs_set_super, flags | SB_NOSEC,
fs_info);
if (IS_ERR(s)) {
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 51cf68785782..958503c8a854 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1091,7 +1091,7 @@ void btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices)
list_for_each_entry(seed_dev, &fs_devices->seed_list, seed_list)
__btrfs_free_extra_devids(seed_dev, &latest_dev);
- fs_devices->latest_bdev = latest_dev->bdev;
+ fs_devices->latest_dev = latest_dev;
mutex_unlock(&uuid_mutex);
}
@@ -1206,7 +1206,7 @@ static int open_fs_devices(struct btrfs_fs_devices *fs_devices,
return -EINVAL;
fs_devices->opened = 1;
- fs_devices->latest_bdev = latest_dev->bdev;
+ fs_devices->latest_dev = latest_dev;
fs_devices->total_rw_bytes = 0;
fs_devices->chunk_alloc_policy = BTRFS_CHUNK_ALLOC_REGULAR;
fs_devices->read_policy = BTRFS_READ_POLICY_PID;
@@ -1968,7 +1968,7 @@ static struct btrfs_device * btrfs_find_next_active_device(
}
/*
- * Helper function to check if the given device is part of s_bdev / latest_bdev
+ * Helper function to check if the given device is part of s_bdev / latest_dev
* and replace it with the provided or the next active device, in the context
* where this function called, there should be always be another device (or
* this_dev) which is active.
@@ -1987,8 +1987,8 @@ void __cold btrfs_assign_next_active_device(struct btrfs_device *device,
(fs_info->sb->s_bdev == device->bdev))
fs_info->sb->s_bdev = next_device->bdev;
- if (fs_info->fs_devices->latest_bdev == device->bdev)
- fs_info->fs_devices->latest_bdev = next_device->bdev;
+ if (fs_info->fs_devices->latest_dev->bdev == device->bdev)
+ fs_info->fs_devices->latest_dev = next_device;
}
/*
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 4c941b4dd269..150b4cd8f81f 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -246,7 +246,7 @@ struct btrfs_fs_devices {
/* Highest generation number of seen devices */
u64 latest_generation;
- struct block_device *latest_bdev;
+ struct btrfs_device *latest_dev;
/* all of the devices in the FS, protected by a mutex
* so we can safely walk it to write out the supers without
--
2.31.1
next prev parent reply other threads:[~2021-08-20 9:54 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-20 9:54 [PATCH v2 0/4] btrf_show_devname related fixes Anand Jain
2021-08-20 9:54 ` [PATCH RFC v2 1/4] btrfs: consolidate device_list_mutex in prepare_sprout to its parent Anand Jain
2021-08-20 9:54 ` Anand Jain [this message]
2021-08-20 9:54 ` [PATCH RFC v2 3/4] btrfs: use latest_dev in btrfs_show_devname Anand Jain
2021-08-20 11:06 ` Anand Jain
2021-08-20 9:54 ` [PATCH v2 4/4] btrfs: update latest_dev when we sprout Anand Jain
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