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Diffstat (limited to 'tools/pkg/0/mlibc/linux-headers/linux/fs.h')
| -rw-r--r-- | tools/pkg/0/mlibc/linux-headers/linux/fs.h | 654 |
1 files changed, 0 insertions, 654 deletions
diff --git a/tools/pkg/0/mlibc/linux-headers/linux/fs.h b/tools/pkg/0/mlibc/linux-headers/linux/fs.h deleted file mode 100644 index b450f43..0000000 --- a/tools/pkg/0/mlibc/linux-headers/linux/fs.h +++ /dev/null @@ -1,654 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ -#ifndef _LINUX_FS_H -#define _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 linux-fsdevel@vger.kernel.org and - * linux-api@vger.kernel.org. - */ - -#include <linux/limits.h> -#include <linux/ioctl.h> -#include <linux/types.h> -#include <linux/fscrypt.h> - -/* Use of MS_* flags within the kernel is restricted to core mount(2) code. */ -#include <linux/mount.h> - -/* - * 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 - -#define RENAME_NOREPLACE (1 << 0) /* Don't overwrite target */ -#define RENAME_EXCHANGE (1 << 1) /* Exchange source and dest */ -#define RENAME_WHITEOUT (1 << 2) /* Whiteout source */ - -/* - * 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 */ - struct file_dedupe_range_info info[]; -}; - -/* 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(). - * - * Note. This is alternative to the structure 'struct file_kattr'/'struct fsxattr'. - * 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_DAX 0x00008000 /* use DAX for IO */ -#define FS_XFLAG_COWEXTSIZE 0x00010000 /* CoW extent size allocator hint */ -#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 BLKGETDISKSEQ _IOR(0x12,128,__u64) -/* 130-136 are used by zoned block device ioctls (uapi/linux/blkzoned.h) */ -/* 137-141 are used by blk-crypto ioctls (uapi/linux/blk-crypto.h) */ - -#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 FIDEDUPERANGE _IOWR(0x94, 54, struct file_dedupe_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 - * linux-fsdevel@vger.kernel.org and linux-api@vger.kernel.org. - */ -#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_ENCRYPT_FL 0x00000800 /* Encrypted file */ -#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_HUGE_FILE_FL 0x00040000 /* Reserved for ext4 */ -#define FS_EXTENT_FL 0x00080000 /* Extents */ -#define FS_VERITY_FL 0x00100000 /* Verity protected inode */ -#define FS_EA_INODE_FL 0x00200000 /* Inode used for large EA */ -#define FS_EOFBLOCKS_FL 0x00400000 /* Reserved for ext4 */ -#define FS_NOCOW_FL 0x00800000 /* Do not cow file */ -#define FS_DAX_FL 0x02000000 /* Inode is DAX */ -#define FS_INLINE_DATA_FL 0x10000000 /* Reserved for ext4 */ -#define FS_PROJINHERIT_FL 0x20000000 /* Create with parents projid */ -#define FS_CASEFOLD_FL 0x40000000 /* Folder is case insensitive */ -#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 ((__kernel_rwf_t)0x00000001) - -/* per-IO O_DSYNC */ -#define RWF_DSYNC ((__kernel_rwf_t)0x00000002) - -/* per-IO O_SYNC */ -#define RWF_SYNC ((__kernel_rwf_t)0x00000004) - -/* per-IO, return -EAGAIN if operation would block */ -#define RWF_NOWAIT ((__kernel_rwf_t)0x00000008) - -/* per-IO O_APPEND */ -#define RWF_APPEND ((__kernel_rwf_t)0x00000010) - -/* per-IO negation of O_APPEND */ -#define RWF_NOAPPEND ((__kernel_rwf_t)0x00000020) - -/* Atomic Write */ -#define RWF_ATOMIC ((__kernel_rwf_t)0x00000040) - -/* buffered IO that drops the cache after reading or writing data */ -#define RWF_DONTCACHE ((__kernel_rwf_t)0x00000080) - -/* prevent pipe and socket writes from raising SIGPIPE */ -#define RWF_NOSIGNAL ((__kernel_rwf_t)0x00000100) - -/* mask of flags supported by the kernel */ -#define RWF_SUPPORTED (RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT |\ - RWF_APPEND | RWF_NOAPPEND | RWF_ATOMIC |\ - RWF_DONTCACHE | RWF_NOSIGNAL) - -#define PROCFS_IOCTL_MAGIC 'f' - -/* Pagemap ioctl */ -#define PAGEMAP_SCAN _IOWR(PROCFS_IOCTL_MAGIC, 16, struct pm_scan_arg) - -/* 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) -#define PAGE_IS_SOFT_DIRTY (1 << 7) -#define PAGE_IS_GUARD (1 << 8) - -/* - * 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 */ -}; - -#endif /* _LINUX_FS_H */ |