Some commands(such as btrfs-convert) access the devices again after we close
the ctree, so it is better that we don't free the devices objects when the ctree
is closed, or we need re-allocate the memory for the devices. We needn't worry
the memory leak problem, because all the memory will be freed after the taskes
die.
Signed-off-by: Miao Xie <mi...@cn.fujitsu.com>
---
btrfs-find-root.c | 21 +--------------------
disk-io.c | 30 ++----------------------------
volumes.c | 3 +++
3 files changed, 6 insertions(+), 48 deletions(-)
diff --git a/btrfs-find-root.c b/btrfs-find-root.c
index 3e1396d..da22c1d 100644
--- a/btrfs-find-root.c
+++ b/btrfs-find-root.c
@@ -65,25 +65,6 @@ int csum_block(void *buf, u32 len)
return ret;
}
-static int close_all_devices(struct btrfs_fs_info *fs_info)
-{
- struct list_head *list;
- struct list_head *next;
- struct btrfs_device *device;
-
- return 0;
-
- list = &fs_info->fs_devices->devices;
- list_for_each(next, list) {
- device = list_entry(next, struct btrfs_device, dev_list);
- if (device->fd != -1) {
- close(device->fd);
- device->fd = -1;
- }
- }
- return 0;
-}
-
static struct btrfs_root *open_ctree_broken(int fd, const char *device)
{
u32 sectorsize;
@@ -217,7 +198,7 @@ static struct btrfs_root *open_ctree_broken(int fd, const
char *device)
out_chunk:
free_extent_buffer(fs_info->chunk_root->node);
out_devices:
- close_all_devices(fs_info);
+ btrfs_close_devices(fs_info->fs_devices);
out_cleanup:
extent_io_tree_cleanup(&fs_info->extent_cache);
extent_io_tree_cleanup(&fs_info->free_space_cache);
diff --git a/disk-io.c b/disk-io.c
index 4003636..a8176a5 100644
--- a/disk-io.c
+++ b/disk-io.c
@@ -35,8 +35,6 @@
#include "utils.h"
#include "print-tree.h"
-static int close_all_devices(struct btrfs_fs_info *fs_info);
-
static int check_tree_block(struct btrfs_root *root, struct extent_buffer *buf)
{
@@ -1028,7 +1026,7 @@ out_chunk:
if (fs_info->chunk_root)
free_extent_buffer(fs_info->chunk_root->node);
out_devices:
- close_all_devices(fs_info);
+ btrfs_close_devices(fs_info->fs_devices);
out_cleanup:
extent_io_tree_cleanup(&fs_info->extent_cache);
extent_io_tree_cleanup(&fs_info->free_space_cache);
@@ -1261,30 +1259,6 @@ int write_ctree_super(struct btrfs_trans_handle *trans,
return ret;
}
-static int close_all_devices(struct btrfs_fs_info *fs_info)
-{
- struct list_head *list;
- struct btrfs_device *device;
-
- list = &fs_info->fs_devices->devices;
- while (!list_empty(list)) {
- device = list_entry(list->next, struct btrfs_device, dev_list);
- list_del_init(&device->dev_list);
- if (device->fd != -1) {
- fsync(device->fd);
- if (posix_fadvise(device->fd, 0, 0,
POSIX_FADV_DONTNEED))
- fprintf(stderr, "Warning, could not drop
caches\n");
- close(device->fd);
- device->fd = -1;
- }
- kfree(device->name);
- kfree(device->label);
- kfree(device);
- }
- kfree(fs_info->fs_devices);
- return 0;
-}
-
static void free_mapping_cache(struct btrfs_fs_info *fs_info)
{
struct cache_tree *cache_tree = &fs_info->mapping_tree.cache_tree;
@@ -1337,7 +1311,7 @@ int close_ctree(struct btrfs_root *root)
free(fs_info->log_root_tree);
}
- close_all_devices(fs_info);
+ btrfs_close_devices(fs_info->fs_devices);
free_mapping_cache(fs_info);
extent_io_tree_cleanup(&fs_info->extent_cache);
extent_io_tree_cleanup(&fs_info->free_space_cache);
diff --git a/volumes.c b/volumes.c
index b88385b..0f6a35b 100644
--- a/volumes.c
+++ b/volumes.c
@@ -163,6 +163,9 @@ again:
list_for_each(cur, &fs_devices->devices) {
device = list_entry(cur, struct btrfs_device, dev_list);
if (device->fd != -1) {
+ fsync(device->fd);
+ if (posix_fadvise(device->fd, 0, 0,
POSIX_FADV_DONTNEED))
+ fprintf(stderr, "Warning, could not drop
caches\n");
close(device->fd);
device->fd = -1;
}
--
1.8.1.4
--
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