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Merge branch 'fix/fst-sysfs' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus-4.5

Browse Source 
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Chris Mason 2016-01-25 16:43:13 -08:00
commit 6b5aa88c86
6 changed files with 53 additions and 1 deletions
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7
fs/btrfs/free-space-tree.c
View File

@ -23,6 +23,7 @@
#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,
@ -1169,6 +1170,9 @@ 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);
@ -1237,6 +1241,9 @@ 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

@ -1459,6 +1459,8 @@ 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;
@ -4067,6 +4069,8 @@ 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

@ -58,6 +58,7 @@
#include "dev-replace.h"
#include "free-space-cache.h"
#include "backref.h"
#include "sysfs.h"
#include "tests/btrfs-tests.h"
#include "qgroup.h"
@ -485,6 +486,9 @@ 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";

32
fs/btrfs/sysfs.c
View File

@ -202,6 +202,7 @@ BTRFS_FEAT_ATTR_INCOMPAT(extended_iref, EXTENDED_IREF);
BTRFS_FEAT_ATTR_INCOMPAT(raid56, RAID56);
BTRFS_FEAT_ATTR_INCOMPAT(skinny_metadata, SKINNY_METADATA);
BTRFS_FEAT_ATTR_INCOMPAT(no_holes, NO_HOLES);
BTRFS_FEAT_ATTR_COMPAT_RO(free_space_tree, FREE_SPACE_TREE);
static struct attribute *btrfs_supported_feature_attrs[] = {
BTRFS_FEAT_ATTR_PTR(mixed_backref),
@ -213,6 +214,7 @@ static struct attribute *btrfs_supported_feature_attrs[] = {
BTRFS_FEAT_ATTR_PTR(raid56),
BTRFS_FEAT_ATTR_PTR(skinny_metadata),
BTRFS_FEAT_ATTR_PTR(no_holes),
BTRFS_FEAT_ATTR_PTR(free_space_tree),
NULL
};
@ -780,6 +782,36 @@ failure:
return error;
}
/*
* Change per-fs features in /sys/fs/btrfs/UUID/features to match current
* values in superblock. Call after any changes to incompat/compat_ro flags
*/
void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info,
u64 bit, enum btrfs_feature_set set)
{
struct btrfs_fs_devices *fs_devs;
struct kobject *fsid_kobj;
u64 features;
int ret;
if (!fs_info)
return;
features = get_features(fs_info, set);
ASSERT(bit & supported_feature_masks[set]);
fs_devs = fs_info->fs_devices;
fsid_kobj = &fs_devs->fsid_kobj;
/*
* FIXME: this is too heavy to update just one value, ideally we'd like
* to use sysfs_update_group but some refactoring is needed first.
*/
sysfs_remove_group(fsid_kobj, &btrfs_feature_attr_group);
ret = sysfs_create_group(fsid_kobj, &btrfs_feature_attr_group);
}
static int btrfs_init_debugfs(void)
{
#ifdef CONFIG_DEBUG_FS

5
fs/btrfs/sysfs.h
View File

@ -56,7 +56,7 @@ static struct btrfs_feature_attr btrfs_attr_##_name = { \
#define BTRFS_FEAT_ATTR_COMPAT(name, feature) \
BTRFS_FEAT_ATTR(name, FEAT_COMPAT, BTRFS_FEATURE_COMPAT, feature)
#define BTRFS_FEAT_ATTR_COMPAT_RO(name, feature) \
BTRFS_FEAT_ATTR(name, FEAT_COMPAT_RO, BTRFS_FEATURE_COMPAT, feature)
BTRFS_FEAT_ATTR(name, FEAT_COMPAT_RO, BTRFS_FEATURE_COMPAT_RO, feature)
#define BTRFS_FEAT_ATTR_INCOMPAT(name, feature) \
BTRFS_FEAT_ATTR(name, FEAT_INCOMPAT, BTRFS_FEATURE_INCOMPAT, feature)
@ -90,4 +90,7 @@ int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs,
struct kobject *parent);
int btrfs_sysfs_add_device(struct btrfs_fs_devices *fs_devs);
void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs);
void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info,
u64 bit, enum btrfs_feature_set set);
#endif /* _BTRFS_SYSFS_H_ */

2
fs/btrfs/volumes.c
View File

@ -4469,6 +4469,8 @@ 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) \