#ifndef _UAPI_LINUX_FS_H

#define _UAPI_LINUX_FS_H

/*

* This file has definitions for some important file table structures

* and constants and structures used by various generic file system

* ioctl's. Please do not make any changes in this file before

* sending patches for review to [email protected] and

* [email protected].

*/

#include <linux/limits.h>

#include <linux/ioctl.h>

#include <linux/types.h>

#ifndef __KERNEL__

#include <linux/fscrypt.h>

#endif

/* Use of MS_* flags within the kernel is restricted to core mount(2) code. */

#if !defined(__KERNEL__)

#include <linux/mount.h>

#endif

/*

* It's silly to have NR_OPEN bigger than NR_FILE, but you can change

* the file limit at runtime and only root can increase the per-process

* nr_file rlimit, so it's safe to set up a ridiculously high absolute

* upper limit on files-per-process.

*

* Some programs (notably those using select()) may have to be

* recompiled to take full advantage of the new limits..

*/

/* Fixed constants first: */

#undef NR_OPEN

#define INR_OPEN_CUR 1024 /* Initial setting for nfile rlimits */

#define INR_OPEN_MAX 4096 /* Hard limit for nfile rlimits */

#define BLOCK_SIZE_BITS 10

#define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)

/* flags for integrity meta */

#define IO_INTEGRITY_CHK_GUARD (1U << 0) /* enforce guard check */

#define IO_INTEGRITY_CHK_REFTAG (1U << 1) /* enforce ref check */

#define IO_INTEGRITY_CHK_APPTAG (1U << 2) /* enforce app check */

#define IO_INTEGRITY_VALID_FLAGS (IO_INTEGRITY_CHK_GUARD | \

IO_INTEGRITY_CHK_REFTAG | \

IO_INTEGRITY_CHK_APPTAG)

#define SEEK_SET 0 /* seek relative to beginning of file */

#define SEEK_CUR 1 /* seek relative to current file position */

#define SEEK_END 2 /* seek relative to end of file */

#define SEEK_DATA 3 /* seek to the next data */

#define SEEK_HOLE 4 /* seek to the next hole */

#define SEEK_MAX SEEK_HOLE

/*

* The root inode of procfs is guaranteed to always have the same inode number.

* For programs that make heavy use of procfs, verifying that the root is a

* real procfs root and using openat2(RESOLVE_{NO_{XDEV,MAGICLINKS},BENEATH})

* will allow you to make sure you are never tricked into operating on the

* wrong procfs file.

*/

enum procfs_ino {

PROCFS_ROOT_INO = 1,

};

struct file_clone_range {

__s64 src_fd;

__u64 src_offset;

__u64 src_length;

__u64 dest_offset;

};

struct fstrim_range {

__u64 start;

__u64 len;

__u64 minlen;

};

/*

* We include a length field because some filesystems (vfat) have an identifier

* that we do want to expose as a UUID, but doesn't have the standard length.

*

* We use a fixed size buffer beacuse this interface will, by fiat, never

* support "UUIDs" longer than 16 bytes; we don't want to force all downstream

* users to have to deal with that.

*/

struct fsuuid2 {

__u8 len;

__u8 uuid[16];

};

struct fs_sysfs_path {

__u8 len;

__u8 name[128];

};

/* Protection info capability flags */

#define LBMD_PI_CAP_INTEGRITY (1 << 0)

#define LBMD_PI_CAP_REFTAG (1 << 1)

/* Checksum types for Protection Information */

#define LBMD_PI_CSUM_NONE 0

#define LBMD_PI_CSUM_IP 1

#define LBMD_PI_CSUM_CRC16_T10DIF 2

#define LBMD_PI_CSUM_CRC64_NVME 4

/* sizeof first published struct */

#define LBMD_SIZE_VER0 16

/*

* Logical block metadata capability descriptor

* If the device does not support metadata, all the fields will be zero.

* Applications must check lbmd_flags to determine whether metadata is

* supported or not.

*/

struct logical_block_metadata_cap {

/* Bitmask of logical block metadata capability flags */

__u32 lbmd_flags;

/*

* The amount of data described by each unit of logical block

* metadata

*/

__u16 lbmd_interval;

/*

* Size in bytes of the logical block metadata associated with each

* interval

*/

__u8 lbmd_size;

/*

* Size in bytes of the opaque block tag associated with each

* interval

*/

__u8 lbmd_opaque_size;

/*

* Offset in bytes of the opaque block tag within the logical block

* metadata

*/

__u8 lbmd_opaque_offset;

/* Size in bytes of the T10 PI tuple associated with each interval */

__u8 lbmd_pi_size;

/* Offset in bytes of T10 PI tuple within the logical block metadata */

__u8 lbmd_pi_offset;

/* T10 PI guard tag type */

__u8 lbmd_guard_tag_type;

/* Size in bytes of the T10 PI application tag */

__u8 lbmd_app_tag_size;

/* Size in bytes of the T10 PI reference tag */

__u8 lbmd_ref_tag_size;

/* Size in bytes of the T10 PI storage tag */

__u8 lbmd_storage_tag_size;

__u8 pad;

};

/* extent-same (dedupe) ioctls; these MUST match the btrfs ioctl definitions */

#define FILE_DEDUPE_RANGE_SAME 0

#define FILE_DEDUPE_RANGE_DIFFERS 1

/* from struct btrfs_ioctl_file_extent_same_info */

struct file_dedupe_range_info {

__s64 dest_fd; /* in - destination file */

__u64 dest_offset; /* in - start of extent in destination */

__u64 bytes_deduped; /* out - total # of bytes we were able

* to dedupe from this file. */

/* status of this dedupe operation:

* < 0 for error

* == FILE_DEDUPE_RANGE_SAME if dedupe succeeds

* == FILE_DEDUPE_RANGE_DIFFERS if data differs

*/

__s32 status; /* out - see above description */

__u32 reserved; /* must be zero */

};

/* from struct btrfs_ioctl_file_extent_same_args */

struct file_dedupe_range {

__u64 src_offset; /* in - start of extent in source */

__u64 src_length; /* in - length of extent */

__u16 dest_count; /* in - total elements in info array */

__u16 reserved1; /* must be zero */

__u32 reserved2; /* must be zero */

};

/* And dynamically-tunable limits and defaults: */

struct files_stat_struct {

unsigned long nr_files; /* read only */

unsigned long nr_free_files; /* read only */

unsigned long max_files; /* tunable */

};

struct inodes_stat_t {

long nr_inodes;

long nr_unused;

long dummy[5]; /* padding for sysctl ABI compatibility */

};

#define NR_FILE 8192 /* this can well be larger on a larger system */

/*

* Structure for FS_IOC_FSGETXATTR[A] and FS_IOC_FSSETXATTR.

*/

struct fsxattr {

__u32 fsx_xflags; /* xflags field value (get/set) */

__u32 fsx_extsize; /* extsize field value (get/set)*/

__u32 fsx_nextents; /* nextents field value (get) */

__u32 fsx_projid; /* project identifier (get/set) */

__u32 fsx_cowextsize; /* CoW extsize field value (get/set)*/

unsigned char fsx_pad[8];

};

/*

* Variable size structure for file_[sg]et_attr().

*

* As this structure is passed to/from userspace with its size, this can

* be versioned based on the size.

*/

struct file_attr {

__u64 fa_xflags; /* xflags field value (get/set) */

__u32 fa_extsize; /* extsize field value (get/set)*/

__u32 fa_nextents; /* nextents field value (get) */

__u32 fa_projid; /* project identifier (get/set) */

__u32 fa_cowextsize; /* CoW extsize field value (get/set) */

};

#define FILE_ATTR_SIZE_VER0 24

#define FILE_ATTR_SIZE_LATEST FILE_ATTR_SIZE_VER0

/*

* Flags for the fsx_xflags field

*/

#define FS_XFLAG_REALTIME 0x00000001 /* data in realtime volume */

#define FS_XFLAG_PREALLOC 0x00000002 /* preallocated file extents */

#define FS_XFLAG_IMMUTABLE 0x00000008 /* file cannot be modified */

#define FS_XFLAG_APPEND 0x00000010 /* all writes append */

#define FS_XFLAG_SYNC 0x00000020 /* all writes synchronous */

#define FS_XFLAG_NOATIME 0x00000040 /* do not update access time */

#define FS_XFLAG_NODUMP 0x00000080 /* do not include in backups */

#define FS_XFLAG_RTINHERIT 0x00000100 /* create with rt bit set */

#define FS_XFLAG_PROJINHERIT 0x00000200 /* create with parents projid */

#define FS_XFLAG_NOSYMLINKS 0x00000400 /* disallow symlink creation */

#define FS_XFLAG_EXTSIZE 0x00000800 /* extent size allocator hint */

#define FS_XFLAG_EXTSZINHERIT 0x00001000 /* inherit inode extent size */

#define FS_XFLAG_NODEFRAG 0x00002000 /* do not defragment */

#define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */

#define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */

/* the read-only stuff doesn't really belong here, but any other place is

probably as bad and I don't want to create yet another include file. */

#define BLKROSET _IO(0x12,93) /* set device read-only (0 = read-write) */

#define BLKROGET _IO(0x12,94) /* get read-only status (0 = read_write) */

#define BLKRRPART _IO(0x12,95) /* re-read partition table */

#define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long *arg) */

#define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */

#define BLKRASET _IO(0x12,98) /* set read ahead for block device */

#define BLKRAGET _IO(0x12,99) /* get current read ahead setting */

#define BLKFRASET _IO(0x12,100)/* set filesystem (mm/filemap.c) read-ahead */

#define BLKFRAGET _IO(0x12,101)/* get filesystem (mm/filemap.c) read-ahead */

#define BLKSECTSET _IO(0x12,102)/* set max sectors per request (ll_rw_blk.c) */

#define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */

#define BLKSSZGET _IO(0x12,104)/* get block device sector size */

#if 0

#define BLKPG _IO(0x12,105)/* See blkpg.h */

/* Some people are morons. Do not use sizeof! */

#define BLKELVGET _IOR(0x12,106,size_t)/* elevator get */

#define BLKELVSET _IOW(0x12,107,size_t)/* elevator set */

/* This was here just to show that the number is taken -

probably all these _IO(0x12,*) ioctls should be moved to blkpg.h. */

#endif

/* A jump here: 108-111 have been used for various private purposes. */

#define BLKBSZGET _IOR(0x12,112,size_t)

#define BLKBSZSET _IOW(0x12,113,size_t)

#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */

#define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup)

#define BLKTRACESTART _IO(0x12,116)

#define BLKTRACESTOP _IO(0x12,117)

#define BLKTRACETEARDOWN _IO(0x12,118)

#define BLKDISCARD _IO(0x12,119)

#define BLKIOMIN _IO(0x12,120)

#define BLKIOOPT _IO(0x12,121)

#define BLKALIGNOFF _IO(0x12,122)

#define BLKPBSZGET _IO(0x12,123)

#define BLKDISCARDZEROES _IO(0x12,124)

#define BLKSECDISCARD _IO(0x12,125)

#define BLKROTATIONAL _IO(0x12,126)

#define BLKZEROOUT _IO(0x12,127)

#define BMAP_IOCTL 1 /* obsolete - kept for compatibility */

#define FIBMAP _IO(0x00,1) /* bmap access */

#define FIGETBSZ _IO(0x00,2) /* get the block size used for bmap */

#define FIFREEZE _IOWR('X', 119, int) /* Freeze */

#define FITHAW _IOWR('X', 120, int) /* Thaw */

#define FITRIM _IOWR('X', 121, struct fstrim_range) /* Trim */

#define FICLONE _IOW(0x94, 9, int)

#define FICLONERANGE _IOW(0x94, 13, struct file_clone_range)

#define FSLABEL_MAX 256 /* Max chars for the interface; each fs may differ */

#define FS_IOC_GETFLAGS _IOR('f', 1, long)

#define FS_IOC_SETFLAGS _IOW('f', 2, long)

#define FS_IOC_GETVERSION _IOR('v', 1, long)

#define FS_IOC_SETVERSION _IOW('v', 2, long)

#define FS_IOC_FIEMAP _IOWR('f', 11, struct fiemap)

#define FS_IOC32_GETFLAGS _IOR('f', 1, int)

#define FS_IOC32_SETFLAGS _IOW('f', 2, int)

#define FS_IOC32_GETVERSION _IOR('v', 1, int)

#define FS_IOC32_SETVERSION _IOW('v', 2, int)

#define FS_IOC_FSGETXATTR _IOR('X', 31, struct fsxattr)

#define FS_IOC_FSSETXATTR _IOW('X', 32, struct fsxattr)

#define FS_IOC_GETFSLABEL _IOR(0x94, 49, char[FSLABEL_MAX])

#define FS_IOC_SETFSLABEL _IOW(0x94, 50, char[FSLABEL_MAX])

/* Returns the external filesystem UUID, the same one blkid returns */

#define FS_IOC_GETFSUUID _IOR(0x15, 0, struct fsuuid2)

/*

* Returns the path component under /sys/fs/ that refers to this filesystem;

* also /sys/kernel/debug/ for filesystems with debugfs exports

*/

#define FS_IOC_GETFSSYSFSPATH _IOR(0x15, 1, struct fs_sysfs_path)

/* Get logical block metadata capability details */

#define FS_IOC_GETLBMD_CAP _IOWR(0x15, 2, struct logical_block_metadata_cap)

/*

* Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS)

*

* Note: for historical reasons, these flags were originally used and

* defined for use by ext2/ext3, and then other file systems started

* using these flags so they wouldn't need to write their own version

* of chattr/lsattr (which was shipped as part of e2fsprogs). You

* should think twice before trying to use these flags in new

* contexts, or trying to assign these flags, since they are used both

* as the UAPI and the on-disk encoding for ext2/3/4. Also, we are

* almost out of 32-bit flags. :-)

*

* We have recently hoisted FS_IOC_FSGETXATTR / FS_IOC_FSSETXATTR from

* XFS to the generic FS level interface. This uses a structure that

* has padding and hence has more room to grow, so it may be more

* appropriate for many new use cases.

*

* Please do not change these flags or interfaces before checking with

* [email protected] and [email protected].

*/

#define FS_SECRM_FL 0x00000001 /* Secure deletion */

#define FS_UNRM_FL 0x00000002 /* Undelete */

#define FS_COMPR_FL 0x00000004 /* Compress file */

#define FS_SYNC_FL 0x00000008 /* Synchronous updates */

#define FS_IMMUTABLE_FL 0x00000010 /* Immutable file */

#define FS_APPEND_FL 0x00000020 /* writes to file may only append */

#define FS_NODUMP_FL 0x00000040 /* do not dump file */

#define FS_NOATIME_FL 0x00000080 /* do not update atime */

/* Reserved for compression usage... */

#define FS_DIRTY_FL 0x00000100

#define FS_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */

#define FS_NOCOMP_FL 0x00000400 /* Don't compress */

/* End compression flags --- maybe not all used */

#define FS_BTREE_FL 0x00001000 /* btree format dir */

#define FS_INDEX_FL 0x00001000 /* hash-indexed directory */

#define FS_IMAGIC_FL 0x00002000 /* AFS directory */

#define FS_JOURNAL_DATA_FL 0x00004000 /* Reserved for ext3 */

#define FS_NOTAIL_FL 0x00008000 /* file tail should not be merged */

#define FS_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */

#define FS_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/

#define FS_EA_INODE_FL 0x00200000 /* Inode used for large EA */

#define FS_EOFBLOCKS_FL 0x00400000 /* Reserved for ext4 */

#define FS_RESERVED_FL 0x80000000 /* reserved for ext2 lib */

#define FS_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */

#define FS_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */

#define SYNC_FILE_RANGE_WAIT_BEFORE 1

#define SYNC_FILE_RANGE_WRITE 2

#define SYNC_FILE_RANGE_WAIT_AFTER 4

#define SYNC_FILE_RANGE_WRITE_AND_WAIT (SYNC_FILE_RANGE_WRITE | \

SYNC_FILE_RANGE_WAIT_BEFORE | \

SYNC_FILE_RANGE_WAIT_AFTER)

/*

* Flags for preadv2/pwritev2:

*/

typedef int __bitwise __kernel_rwf_t;

/* high priority request, poll if possible */

#define RWF_HIPRI ((__force __kernel_rwf_t)0x00000001)

/* per-IO O_DSYNC */

#define RWF_DSYNC ((__force __kernel_rwf_t)0x00000002)

/* per-IO O_SYNC */

#define RWF_SYNC ((__force __kernel_rwf_t)0x00000004)

/* per-IO, return -EAGAIN if operation would block */

#define RWF_NOWAIT ((__force __kernel_rwf_t)0x00000008)

/* per-IO O_APPEND */

#define RWF_APPEND ((__force __kernel_rwf_t)0x00000010)

/* per-IO negation of O_APPEND */

#define RWF_NOAPPEND ((__force __kernel_rwf_t)0x00000020)

/* Atomic Write */

#define RWF_ATOMIC ((__force __kernel_rwf_t)0x00000040)

/* buffered IO that drops the cache after reading or writing data */

#define RWF_DONTCACHE ((__force __kernel_rwf_t)0x00000080)

/* prevent pipe and socket writes from raising SIGPIPE */

#define RWF_NOSIGNAL ((__force __kernel_rwf_t)0x00000100)

#define PROCFS_IOCTL_MAGIC 'f'

/* Bitmasks provided in pm_scan_args masks and reported in page_region.categories. */

#define PAGE_IS_WPALLOWED (1 << 0)

#define PAGE_IS_WRITTEN (1 << 1)

#define PAGE_IS_FILE (1 << 2)

#define PAGE_IS_PRESENT (1 << 3)

#define PAGE_IS_SWAPPED (1 << 4)

#define PAGE_IS_PFNZERO (1 << 5)

#define PAGE_IS_HUGE (1 << 6)

/*

* struct page_region - Page region with flags

* @start: Start of the region

* @end: End of the region (exclusive)

* @categories: PAGE_IS_* category bitmask for the region

*/

struct page_region {

__u64 start;

__u64 end;

__u64 categories;

};

/* Flags for PAGEMAP_SCAN ioctl */

#define PM_SCAN_WP_MATCHING (1 << 0) /* Write protect the pages matched. */

#define PM_SCAN_CHECK_WPASYNC (1 << 1) /* Abort the scan when a non-WP-enabled page is found. */

/*

* struct pm_scan_arg - Pagemap ioctl argument

* @size: Size of the structure

* @flags: Flags for the IOCTL

* @start: Starting address of the region

* @end: Ending address of the region

* @walk_end Address where the scan stopped (written by kernel).

* walk_end == end (address tags cleared) informs that the scan completed on entire range.

* @vec: Address of page_region struct array for output

* @vec_len: Length of the page_region struct array

* @max_pages: Optional limit for number of returned pages (0 = disabled)

* @category_inverted: PAGE_IS_* categories which values match if 0 instead of 1

* @category_mask: Skip pages for which any category doesn't match

* @category_anyof_mask: Skip pages for which no category matches

* @return_mask: PAGE_IS_* categories that are to be reported in `page_region`s returned

*/

struct pm_scan_arg {

__u64 size;

__u64 flags;

__u64 start;

__u64 end;

__u64 walk_end;

__u64 vec;

__u64 vec_len;

__u64 max_pages;

__u64 category_inverted;

__u64 category_mask;

__u64 category_anyof_mask;

__u64 return_mask;

};

/* /proc/<pid>/maps ioctl */

#define PROCMAP_QUERY _IOWR(PROCFS_IOCTL_MAGIC, 17, struct procmap_query)

enum procmap_query_flags {

/*

* VMA permission flags.

*

* Can be used as part of procmap_query.query_flags field to look up

* only VMAs satisfying specified subset of permissions. E.g., specifying

* PROCMAP_QUERY_VMA_READABLE only will return both readable and read/write VMAs,

* while having PROCMAP_QUERY_VMA_READABLE | PROCMAP_QUERY_VMA_WRITABLE will only

* return read/write VMAs, though both executable/non-executable and

* private/shared will be ignored.

*

* PROCMAP_QUERY_VMA_* flags are also returned in procmap_query.vma_flags

* field to specify actual VMA permissions.

*/

PROCMAP_QUERY_VMA_READABLE = 0x01,

PROCMAP_QUERY_VMA_WRITABLE = 0x02,

PROCMAP_QUERY_VMA_EXECUTABLE = 0x04,

PROCMAP_QUERY_VMA_SHARED = 0x08,

/*

* Query modifier flags.

*

* By default VMA that covers provided address is returned, or -ENOENT

* is returned. With PROCMAP_QUERY_COVERING_OR_NEXT_VMA flag set, closest

* VMA with vma_start > addr will be returned if no covering VMA is

* found.

*

* PROCMAP_QUERY_FILE_BACKED_VMA instructs query to consider only VMAs that

* have file backing. Can be combined with PROCMAP_QUERY_COVERING_OR_NEXT_VMA

* to iterate all VMAs with file backing.

*/

PROCMAP_QUERY_COVERING_OR_NEXT_VMA = 0x10,

PROCMAP_QUERY_FILE_BACKED_VMA = 0x20,

};

/*

* Input/output argument structured passed into ioctl() call. It can be used

* to query a set of VMAs (Virtual Memory Areas) of a process.

*

* Each field can be one of three kinds, marked in a short comment to the

* right of the field:

* - "in", input argument, user has to provide this value, kernel doesn't modify it;

* - "out", output argument, kernel sets this field with VMA data;

* - "in/out", input and output argument; user provides initial value (used

* to specify maximum allowable buffer size), and kernel sets it to actual

* amount of data written (or zero, if there is no data).

*

* If matching VMA is found (according to criterias specified by

* query_addr/query_flags, all the out fields are filled out, and ioctl()

* returns 0. If there is no matching VMA, -ENOENT will be returned.

* In case of any other error, negative error code other than -ENOENT is

* returned.

*

* Most of the data is similar to the one returned as text in /proc/<pid>/maps

* file, but procmap_query provides more querying flexibility. There are no

* consistency guarantees between subsequent ioctl() calls, but data returned

* for matched VMA is self-consistent.

*/

struct procmap_query {

/* Query struct size, for backwards/forward compatibility */

__u64 size;

/*

* Query flags, a combination of enum procmap_query_flags values.

* Defines query filtering and behavior, see enum procmap_query_flags.

*

* Input argument, provided by user. Kernel doesn't modify it.

*/

__u64 query_flags; /* in */

/*

* Query address. By default, VMA that covers this address will

* be looked up. PROCMAP_QUERY_* flags above modify this default

* behavior further.

*

* Input argument, provided by user. Kernel doesn't modify it.

*/

__u64 query_addr; /* in */

/* VMA starting (inclusive) and ending (exclusive) address, if VMA is found. */

__u64 vma_start; /* out */

__u64 vma_end; /* out */

/* VMA permissions flags. A combination of PROCMAP_QUERY_VMA_* flags. */

__u64 vma_flags; /* out */

/* VMA backing page size granularity. */

__u64 vma_page_size; /* out */

/*

* VMA file offset. If VMA has file backing, this specifies offset

* within the file that VMA's start address corresponds to.

* Is set to zero if VMA has no backing file.

*/

__u64 vma_offset; /* out */

/* Backing file's inode number, or zero, if VMA has no backing file. */

__u64 inode; /* out */

/* Backing file's device major/minor number, or zero, if VMA has no backing file. */

__u32 dev_major; /* out */

__u32 dev_minor; /* out */

/*

* If set to non-zero value, signals the request to return VMA name

* (i.e., VMA's backing file's absolute path, with " (deleted)" suffix

* appended, if file was unlinked from FS) for matched VMA. VMA name

* can also be some special name (e.g., "[heap]", "[stack]") or could

* be even user-supplied with prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME).

*

* Kernel will set this field to zero, if VMA has no associated name.

* Otherwise kernel will return actual amount of bytes filled in

* user-supplied buffer (see vma_name_addr field below), including the

* terminating zero.

*

* If VMA name is longer that user-supplied maximum buffer size,

* -E2BIG error is returned.

*

* If this field is set to non-zero value, vma_name_addr should point

* to valid user space memory buffer of at least vma_name_size bytes.

* If set to zero, vma_name_addr should be set to zero as well

*/

__u32 vma_name_size; /* in/out */

/*

* If set to non-zero value, signals the request to extract and return

* VMA's backing file's build ID, if the backing file is an ELF file

* and it contains embedded build ID.

*

* Kernel will set this field to zero, if VMA has no backing file,

* backing file is not an ELF file, or ELF file has no build ID

* embedded.

*

* Build ID is a binary value (not a string). Kernel will set

* build_id_size field to exact number of bytes used for build ID.

* If build ID is requested and present, but needs more bytes than

* user-supplied maximum buffer size (see build_id_addr field below),

* -E2BIG error will be returned.

*

* If this field is set to non-zero value, build_id_addr should point

* to valid user space memory buffer of at least build_id_size bytes.

* If set to zero, build_id_addr should be set to zero as well

*/

__u32 build_id_size; /* in/out */

/*

* User-supplied address of a buffer of at least vma_name_size bytes

* for kernel to fill with matched VMA's name (see vma_name_size field

* description above for details).

*

* Should be set to zero if VMA name should not be returned.

*/

__u64 vma_name_addr; /* in */

/*

* User-supplied address of a buffer of at least build_id_size bytes

* for kernel to fill with matched VMA's ELF build ID, if available

* (see build_id_size field description above for details).

*

* Should be set to zero if build ID should not be returned.

*/

__u64 build_id_addr; /* in */

};

/*

* Shutdown the filesystem.

*/

#define FS_IOC_SHUTDOWN _IOR('X', 125, __u32)

/*

* Flags for FS_IOC_SHUTDOWN

*/

#define FS_SHUTDOWN_FLAGS_DEFAULT 0x0

#define FS_SHUTDOWN_FLAGS_LOGFLUSH 0x1 /* flush log but not data*/

#define FS_SHUTDOWN_FLAGS_NOLOGFLUSH 0x2 /* don't flush log nor data */