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Revert "btrfs: synchronize incompat feature bits with sysfs files" 

This reverts commit 14e46e0495.

This ends up doing sysfs operations from deep in balance (where we
should be GFP_NOFS) and under heavy balance load, we're making races
against sysfs internals.

Revert it for now while we figure things out.

Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Chris Mason 2016-01-29 08:19:37 -08:00
parent e1c0ebad3f
commit e410e34fad
4 changed files with 0 additions and 17 deletions
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7
fs/btrfs/free-space-tree.c
View File

@ -23,7 +23,6 @@
#include "locking.h"
#include "free-space-tree.h"
#include "transaction.h"
#include "sysfs.h"
static int __add_block_group_free_space(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
@ -1184,9 +1183,6 @@ int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info)
}
btrfs_set_fs_compat_ro(fs_info, FREE_SPACE_TREE);
btrfs_sysfs_feature_update(fs_info,
BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE, FEAT_COMPAT_RO);
fs_info->creating_free_space_tree = 0;
ret = btrfs_commit_transaction(trans, tree_root);
@ -1255,9 +1251,6 @@ int btrfs_clear_free_space_tree(struct btrfs_fs_info *fs_info)
return PTR_ERR(trans);
btrfs_clear_fs_compat_ro(fs_info, FREE_SPACE_TREE);
btrfs_sysfs_feature_update(fs_info,
BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE, FEAT_COMPAT_RO);
fs_info->free_space_root = NULL;
ret = clear_free_space_tree(trans, free_space_root);

4
fs/btrfs/ioctl.c
View File

@ -1459,8 +1459,6 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
if (range->compress_type == BTRFS_COMPRESS_LZO) {
btrfs_set_fs_incompat(root->fs_info, COMPRESS_LZO);
btrfs_sysfs_feature_update(root->fs_info,
BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO, FEAT_INCOMPAT);
}
ret = defrag_count;
@ -4069,8 +4067,6 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp)
btrfs_free_path(path);
btrfs_set_fs_incompat(root->fs_info, DEFAULT_SUBVOL);
btrfs_sysfs_feature_update(root->fs_info,
BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL, FEAT_INCOMPAT);
btrfs_end_transaction(trans, root);
out:
mnt_drop_write_file(file);

4
fs/btrfs/super.c
View File

@ -58,7 +58,6 @@
#include "dev-replace.h"
#include "free-space-cache.h"
#include "backref.h"
#include "sysfs.h"
#include "tests/btrfs-tests.h"
#include "qgroup.h"
@ -486,9 +485,6 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
btrfs_clear_opt(info->mount_opt, NODATACOW);
btrfs_clear_opt(info->mount_opt, NODATASUM);
btrfs_set_fs_incompat(info, COMPRESS_LZO);
btrfs_sysfs_feature_update(root->fs_info,
BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO,
FEAT_INCOMPAT);
no_compress = 0;
} else if (strncmp(args[0].from, "no", 2) == 0) {
compress_type = "no";

2
fs/btrfs/volumes.c
View File

@ -4469,8 +4469,6 @@ static void check_raid56_incompat_flag(struct btrfs_fs_info *info, u64 type)
return;
btrfs_set_fs_incompat(info, RAID56);
btrfs_sysfs_feature_update(info, BTRFS_FEATURE_INCOMPAT_RAID56,
FEAT_INCOMPAT);
}
#define BTRFS_MAX_DEVS(r) ((BTRFS_LEAF_DATA_SIZE(r) \