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linux/fs/btrfs/super.h

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btrfs: move super prototypes into super.h Move these out of ctree.h into super.h to cut down on code in ctree.h. Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2022-10-27 03:08:39 +08:00
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef BTRFS_SUPER_H
#define BTRFS_SUPER_H
btrfs: add forward declarations and headers, part 1 Do a cleanup in the short headers: - add forward declarations for types referenced by pointers - add includes when types need them This fixes potential compilation problems if the headers are reordered or the missing includes are not provided indirectly. Signed-off-by: David Sterba <dsterba@suse.com>
2024-01-27 07:53:06 +08:00
#include <linux/types.h>
#include <linux/fs.h>
#include "fs.h"
struct super_block;
struct btrfs_fs_info;
btrfs: change BTRFS_MOUNT_* flags to 64bit type Currently the BTRFS_MOUNT_* flags are already beyond 32 bits, this is going to cause compilation errors for some 32 bit systems, as their unsigned long is only 32 bits long, thus flag BTRFS_MOUNT_IGNORESUPERFLAGS overflows and can lead to errors. Fix the problem by: - Migrate all existing BTRFS_MOUNT_* flags to unsigned long long - Migrate all mount option related variables to unsigned long long * btrfs_fs_info::mount_opt * btrfs_fs_context::mount_opt * mount_opt parameter of btrfs_check_options() * old_opts parameter of btrfs_remount_begin() * old_opts parameter of btrfs_remount_cleanup() * mount_opt parameter of btrfs_check_mountopts_zoned() * mount_opt and opt parameters of check_ro_option() Fixes: 32e6216512b4 ("btrfs: introduce new "rescue=ignoresuperflags" mount option") Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2024-07-13 17:03:44 +08:00
bool btrfs_check_options(const struct btrfs_fs_info *info,
unsigned long long *mount_opt,
btrfs: switch to the new mount API Now that we have all of the parts in place to use the new mount API, switch our fs_type to use the new callbacks. There are a few things that have to be done at the same time because of the order of operations changes that come along with the new mount API. These must be done in the same patch otherwise things will go wrong. 1. Export and use btrfs_check_options in open_ctree(). This is because the options are done ahead of time, and we need to check them once we have the feature flags loaded. 2. Update the free space cache settings. Since we're coming in with the options already set we need to make sure we don't undo what the user has asked for. 3. Set our sb_flags at init_fs_context time, the fs_context stuff is trying to manage the sb_flagss itself, so move that into init_fs_context and out of the fill super part. Additionally I've marked the unused functions with __maybe_unused and will remove them in a future patch. Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Acked-by: Christian Brauner <brauner@kernel.org> Signed-off-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2023-11-23 01:17:50 +08:00
unsigned long flags);
btrfs: move super prototypes into super.h Move these out of ctree.h into super.h to cut down on code in ctree.h. Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2022-10-27 03:08:39 +08:00
int btrfs_sync_fs(struct super_block *sb, int wait);
char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
u64 subvol_objectid);
btrfs: move space cache settings into open_ctree Currently we pre-load the space cache settings in btrfs_parse_options, however when we switch to the new mount API the mount option parsing will happen before we have the super block loaded. Add a helper to set the appropriate options based on the fs settings, this will allow us to have consistent free space cache settings. This also folds in the space cache related decisions we make for subpage sectorsize support, so all of this is done in one place. Since this was being called by parse options it looks like we're changing the behavior of remount, but in fact we aren't. The pre-loading of the free space cache settings is done because we want to handle the case of users not using any space_cache options, we'll derive the appropriate mount option based on the on disk state. On remount this wouldn't reset anything as we'll have cleared the v1 cache generation if we mounted -o nospace_cache. Similarly it's impossible to turn off the free space tree without specifically saying -o nospace_cache,clear_cache, which will delete the free space tree and clear the compat_ro option. Again in this case calling this code in remount wouldn't result in any change. Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Reviewed-by: Anand Jain <anand.jain@oracle.com> Acked-by: Christian Brauner <brauner@kernel.org> Signed-off-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2023-11-23 01:17:40 +08:00
void btrfs_set_free_space_cache_settings(struct btrfs_fs_info *fs_info);
btrfs: move super prototypes into super.h Move these out of ctree.h into super.h to cut down on code in ctree.h. Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2022-10-27 03:08:39 +08:00
btrfs: move super_block specific helpers into super.h This will make syncing fs.h to user space a little easier if we can pull the super block specific helpers out of fs.h and put them in super.h. Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2022-10-27 03:08:40 +08:00
static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
{
return sb->s_fs_info;
}
static inline void btrfs_set_sb_rdonly(struct super_block *sb)
{
sb->s_flags |= SB_RDONLY;
set_bit(BTRFS_FS_STATE_RO, &btrfs_sb(sb)->fs_state);
}
static inline void btrfs_clear_sb_rdonly(struct super_block *sb)
{
sb->s_flags &= ~SB_RDONLY;
clear_bit(BTRFS_FS_STATE_RO, &btrfs_sb(sb)->fs_state);
}
btrfs: move super prototypes into super.h Move these out of ctree.h into super.h to cut down on code in ctree.h. Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2022-10-27 03:08:39 +08:00
#endif
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