Pull ext4 updates from Ted Ts'o: "There are a number of major cleanups in ext4 this cycle: - The data=journal writepath has been significantly cleaned up and simplified, and reduces a large number of data=journal special cases by Jan Kara. - Ojaswin Muhoo has replaced linked list used to track extents that have been used for inode preallocation with a red-black tree in the multi-block allocator. This improves performance for workloads which do a large number of random allocating writes. - Thanks to Kemeng Shi for a lot of cleanup and bug fixes in the multi-block allocator. - Matthew wilcox has converted the code paths for reading and writing ext4 pages to use folios. - Jason Yan has continued to factor out ext4_fill_super() into smaller functions for improve ease of maintenance and comprehension. - Josh Triplett has created an uapi header for ext4 userspace API's" * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (105 commits) ext4: Add a uapi header for ext4 userspace APIs ext4: remove useless conditional branch code ext4: remove unneeded check of nr_to_submit ext4: move dax and encrypt checking into ext4_check_feature_compatibility() ext4: factor out ext4_block_group_meta_init() ext4: move s_reserved_gdt_blocks and addressable checking into ext4_check_geometry() ext4: rename two functions with 'check' ext4: factor out ext4_flex_groups_free() ext4: use ext4_group_desc_free() in ext4_put_super() to save some duplicated code ext4: factor out ext4_percpu_param_init() and ext4_percpu_param_destroy() ext4: factor out ext4_hash_info_init() Revert "ext4: Fix warnings when freezing filesystem with journaled data" ext4: Update comment in mpage_prepare_extent_to_map() ext4: Simplify handling of journalled data in ext4_bmap() ext4: Drop special handling of journalled data from ext4_quota_on() ext4: Drop special handling of journalled data from ext4_evict_inode() ext4: Fix special handling of journalled data from extent zeroing ext4: Drop special handling of journalled data from extent shifting operations ext4: Drop special handling of journalled data from ext4_sync_file() ext4: Commit transaction before writing back pages in data=journal mode ...
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| 1 | +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ | |
| 2 | + | |
| 3 | +#ifndef _UAPI_LINUX_EXT4_H | |
| 4 | +#define _UAPI_LINUX_EXT4_H | |
| 5 | +#include <linux/fiemap.h> | |
| 6 | +#include <linux/fs.h> | |
| 7 | +#include <linux/ioctl.h> | |
| 8 | +#include <linux/types.h> | |
| 9 | + | |
| 10 | +/* | |
| 11 | + * ext4-specific ioctl commands | |
| 12 | + */ | |
| 13 | +#define EXT4_IOC_GETVERSION _IOR('f', 3, long) | |
| 14 | +#define EXT4_IOC_SETVERSION _IOW('f', 4, long) | |
| 15 | +#define EXT4_IOC_GETVERSION_OLD FS_IOC_GETVERSION | |
| 16 | +#define EXT4_IOC_SETVERSION_OLD FS_IOC_SETVERSION | |
| 17 | +#define EXT4_IOC_GETRSVSZ _IOR('f', 5, long) | |
| 18 | +#define EXT4_IOC_SETRSVSZ _IOW('f', 6, long) | |
| 19 | +#define EXT4_IOC_GROUP_EXTEND _IOW('f', 7, unsigned long) | |
| 20 | +#define EXT4_IOC_GROUP_ADD _IOW('f', 8, struct ext4_new_group_input) | |
| 21 | +#define EXT4_IOC_MIGRATE _IO('f', 9) | |
| 22 | + /* note ioctl 10 reserved for an early version of the FIEMAP ioctl */ | |
| 23 | + /* note ioctl 11 reserved for filesystem-independent FIEMAP ioctl */ | |
| 24 | +#define EXT4_IOC_ALLOC_DA_BLKS _IO('f', 12) | |
| 25 | +#define EXT4_IOC_MOVE_EXT _IOWR('f', 15, struct move_extent) | |
| 26 | +#define EXT4_IOC_RESIZE_FS _IOW('f', 16, __u64) | |
| 27 | +#define EXT4_IOC_SWAP_BOOT _IO('f', 17) | |
| 28 | +#define EXT4_IOC_PRECACHE_EXTENTS _IO('f', 18) | |
| 29 | +/* ioctl codes 19--39 are reserved for fscrypt */ | |
| 30 | +#define EXT4_IOC_CLEAR_ES_CACHE _IO('f', 40) | |
| 31 | +#define EXT4_IOC_GETSTATE _IOW('f', 41, __u32) | |
| 32 | +#define EXT4_IOC_GET_ES_CACHE _IOWR('f', 42, struct fiemap) | |
| 33 | +#define EXT4_IOC_CHECKPOINT _IOW('f', 43, __u32) | |
| 34 | +#define EXT4_IOC_GETFSUUID _IOR('f', 44, struct fsuuid) | |
| 35 | +#define EXT4_IOC_SETFSUUID _IOW('f', 44, struct fsuuid) | |
| 36 | + | |
| 37 | +#define EXT4_IOC_SHUTDOWN _IOR('X', 125, __u32) | |
| 38 | + | |
| 39 | +/* | |
| 40 | + * ioctl commands in 32 bit emulation | |
| 41 | + */ | |
| 42 | +#define EXT4_IOC32_GETVERSION _IOR('f', 3, int) | |
| 43 | +#define EXT4_IOC32_SETVERSION _IOW('f', 4, int) | |
| 44 | +#define EXT4_IOC32_GETRSVSZ _IOR('f', 5, int) | |
| 45 | +#define EXT4_IOC32_SETRSVSZ _IOW('f', 6, int) | |
| 46 | +#define EXT4_IOC32_GROUP_EXTEND _IOW('f', 7, unsigned int) | |
| 47 | +#define EXT4_IOC32_GROUP_ADD _IOW('f', 8, struct compat_ext4_new_group_input) | |
| 48 | +#define EXT4_IOC32_GETVERSION_OLD FS_IOC32_GETVERSION | |
| 49 | +#define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION | |
| 50 | + | |
| 51 | +/* | |
| 52 | + * Flags returned by EXT4_IOC_GETSTATE | |
| 53 | + * | |
| 54 | + * We only expose to userspace a subset of the state flags in | |
| 55 | + * i_state_flags | |
| 56 | + */ | |
| 57 | +#define EXT4_STATE_FLAG_EXT_PRECACHED 0x00000001 | |
| 58 | +#define EXT4_STATE_FLAG_NEW 0x00000002 | |
| 59 | +#define EXT4_STATE_FLAG_NEWENTRY 0x00000004 | |
| 60 | +#define EXT4_STATE_FLAG_DA_ALLOC_CLOSE 0x00000008 | |
| 61 | + | |
| 62 | +/* | |
| 63 | + * Flags for ioctl EXT4_IOC_CHECKPOINT | |
| 64 | + */ | |
| 65 | +#define EXT4_IOC_CHECKPOINT_FLAG_DISCARD 0x1 | |
| 66 | +#define EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT 0x2 | |
| 67 | +#define EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN 0x4 | |
| 68 | +#define EXT4_IOC_CHECKPOINT_FLAG_VALID (EXT4_IOC_CHECKPOINT_FLAG_DISCARD | \ | |
| 69 | + EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT | \ | |
| 70 | + EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN) | |
| 71 | + | |
| 72 | +/* | |
| 73 | + * Structure for EXT4_IOC_GETFSUUID/EXT4_IOC_SETFSUUID | |
| 74 | + */ | |
| 75 | +struct fsuuid { | |
| 76 | + __u32 fsu_len; | |
| 77 | + __u32 fsu_flags; | |
| 78 | + __u8 fsu_uuid[]; | |
| 79 | +}; | |
| 80 | + | |
| 81 | +/* | |
| 82 | + * Structure for EXT4_IOC_MOVE_EXT | |
| 83 | + */ | |
| 84 | +struct move_extent { | |
| 85 | + __u32 reserved; /* should be zero */ | |
| 86 | + __u32 donor_fd; /* donor file descriptor */ | |
| 87 | + __u64 orig_start; /* logical start offset in block for orig */ | |
| 88 | + __u64 donor_start; /* logical start offset in block for donor */ | |
| 89 | + __u64 len; /* block length to be moved */ | |
| 90 | + __u64 moved_len; /* moved block length */ | |
| 91 | +}; | |
| 92 | + | |
| 93 | +/* | |
| 94 | + * Flags used by EXT4_IOC_SHUTDOWN | |
| 95 | + */ | |
| 96 | +#define EXT4_GOING_FLAGS_DEFAULT 0x0 /* going down */ | |
| 97 | +#define EXT4_GOING_FLAGS_LOGFLUSH 0x1 /* flush log but not data */ | |
| 98 | +#define EXT4_GOING_FLAGS_NOLOGFLUSH 0x2 /* don't flush log nor data */ | |
| 99 | + | |
| 100 | +/* Used to pass group descriptor data when online resize is done */ | |
| 101 | +struct ext4_new_group_input { | |
| 102 | + __u32 group; /* Group number for this data */ | |
| 103 | + __u64 block_bitmap; /* Absolute block number of block bitmap */ | |
| 104 | + __u64 inode_bitmap; /* Absolute block number of inode bitmap */ | |
| 105 | + __u64 inode_table; /* Absolute block number of inode table start */ | |
| 106 | + __u32 blocks_count; /* Total number of blocks in this group */ | |
| 107 | + __u16 reserved_blocks; /* Number of reserved blocks in this group */ | |
| 108 | + __u16 unused; | |
| 109 | +}; | |
| 110 | + | |
| 111 | +/* | |
| 112 | + * Returned by EXT4_IOC_GET_ES_CACHE as an additional possible flag. | |
| 113 | + * It indicates that the entry in extent status cache is for a hole. | |
| 114 | + */ | |
| 115 | +#define EXT4_FIEMAP_EXTENT_HOLE 0x08000000 | |
| 116 | + | |
| 117 | +#endif /* _UAPI_LINUX_EXT4_H */ | |