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| author | Eduard Zingerman <eddyz87@gmail.com> | 2026-09-04 17:05:56 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-09-04 18:17:30 -0700 |
| commit | 506ada89629ec7059b96ecfb0dc7d33ece0103ca (patch) | |
| tree | 0b07297409b68d2333fb4f0eae7f3b072eb68d4c /fs/ext4/fsmap.h | |
| download | linux-stable-506ada89629ec7059b96ecfb0dc7d33ece0103ca.tar.gz linux-stable-506ada89629ec7059b96ecfb0dc7d33ece0103ca.zip | |
bpf: mark a NULL kfunc argument precisegrafted
check_kfunc_arg() allows bpf_register_is_null() for nullable arguments
w/o marking the underlying scalar register precise. Hence a checkpoint
created on such a path would prune against arbitrary scalar value.
Fixes: 3bda08b63670 ("bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)")
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'fs/ext4/fsmap.h')
| -rw-r--r-- | fs/ext4/fsmap.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/fs/ext4/fsmap.h b/fs/ext4/fsmap.h new file mode 100644 index 000000000..ac642be23 --- /dev/null +++ b/fs/ext4/fsmap.h @@ -0,0 +1,56 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2017 Oracle. All Rights Reserved. + * + * Author: Darrick J. Wong <darrick.wong@oracle.com> + */ +#ifndef __EXT4_FSMAP_H__ +#define __EXT4_FSMAP_H__ + +struct fsmap; + +/* internal fsmap representation */ +struct ext4_fsmap { + struct list_head fmr_list; + dev_t fmr_device; /* device id */ + uint32_t fmr_flags; /* mapping flags */ + uint64_t fmr_physical; /* device offset of segment */ + uint64_t fmr_owner; /* owner id */ + uint64_t fmr_length; /* length of segment, blocks */ +}; + +struct ext4_fsmap_head { + uint32_t fmh_iflags; /* control flags */ + uint32_t fmh_oflags; /* output flags */ + unsigned int fmh_count; /* # of entries in array incl. input */ + unsigned int fmh_entries; /* # of entries filled in (output). */ + + struct ext4_fsmap fmh_keys[2]; /* low and high keys */ +}; + +void ext4_fsmap_from_internal(struct super_block *sb, struct fsmap *dest, + struct ext4_fsmap *src); +void ext4_fsmap_to_internal(struct super_block *sb, struct ext4_fsmap *dest, + struct fsmap *src); + +/* fsmap to userspace formatter - copy to user & advance pointer */ +typedef int (*ext4_fsmap_format_t)(struct ext4_fsmap *, void *); + +int ext4_getfsmap(struct super_block *sb, struct ext4_fsmap_head *head, + ext4_fsmap_format_t formatter, void *arg); + +#define EXT4_QUERY_RANGE_ABORT 1 +#define EXT4_QUERY_RANGE_CONTINUE 0 + +/* fmr_owner special values for FS_IOC_GETFSMAP; some share w/ XFS */ +#define EXT4_FMR_OWN_FREE FMR_OWN_FREE /* free space */ +#define EXT4_FMR_OWN_UNKNOWN FMR_OWN_UNKNOWN /* unknown owner */ +#define EXT4_FMR_OWN_FS FMR_OWNER('X', 1) /* static fs metadata */ +#define EXT4_FMR_OWN_LOG FMR_OWNER('X', 2) /* journalling log */ +#define EXT4_FMR_OWN_INODES FMR_OWNER('X', 5) /* inodes */ +#define EXT4_FMR_OWN_GDT FMR_OWNER('f', 1) /* group descriptors */ +#define EXT4_FMR_OWN_RESV_GDT FMR_OWNER('f', 2) /* reserved gdt blocks */ +#define EXT4_FMR_OWN_BLKBM FMR_OWNER('f', 3) /* block bitmap */ +#define EXT4_FMR_OWN_INOBM FMR_OWNER('f', 4) /* inode bitmap */ + +#endif /* __EXT4_FSMAP_H__ */ |