From 3ec30a861ca92e55bbad9b709ab6f22636a226f0 Mon Sep 17 00:00:00 2001 From: Alessio Balsini Date: Fri, 28 Jan 2022 11:40:33 +0000 Subject: Update kernel header with latest upstream The latest kernel introduces some additional functionalities and fields. The most important change is the extension of the init flags field to 64-bit (split into flags and flags2, both of 32 bits). Get ready for the implementation of the new functionalities by updating the kernel header. Bug: 215310351 Test: launch_cvd (both android-mainline and android13-5.10) \ `logcat FuseDaemon:V \*:S` shows no FUSE passthrough errors Signed-off-by: Alessio Balsini Change-Id: Iff13c260e8a03e7bd36777766b268a2694e4702e --- include/fuse_kernel.h | 225 ++++++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 211 insertions(+), 14 deletions(-) diff --git a/include/fuse_kernel.h b/include/fuse_kernel.h index b1f1e1d..7adace0 100644 --- a/include/fuse_kernel.h +++ b/include/fuse_kernel.h @@ -38,6 +38,43 @@ * * Protocol changelog: * + * 7.1: + * - add the following messages: + * FUSE_SETATTR, FUSE_SYMLINK, FUSE_MKNOD, FUSE_MKDIR, FUSE_UNLINK, + * FUSE_RMDIR, FUSE_RENAME, FUSE_LINK, FUSE_OPEN, FUSE_READ, FUSE_WRITE, + * FUSE_RELEASE, FUSE_FSYNC, FUSE_FLUSH, FUSE_SETXATTR, FUSE_GETXATTR, + * FUSE_LISTXATTR, FUSE_REMOVEXATTR, FUSE_OPENDIR, FUSE_READDIR, + * FUSE_RELEASEDIR + * - add padding to messages to accommodate 32-bit servers on 64-bit kernels + * + * 7.2: + * - add FOPEN_DIRECT_IO and FOPEN_KEEP_CACHE flags + * - add FUSE_FSYNCDIR message + * + * 7.3: + * - add FUSE_ACCESS message + * - add FUSE_CREATE message + * - add filehandle to fuse_setattr_in + * + * 7.4: + * - add frsize to fuse_kstatfs + * - clean up request size limit checking + * + * 7.5: + * - add flags and max_write to fuse_init_out + * + * 7.6: + * - add max_readahead to fuse_init_in and fuse_init_out + * + * 7.7: + * - add FUSE_INTERRUPT message + * - add POSIX file lock support + * + * 7.8: + * - add lock_owner and flags fields to fuse_release_in + * - add FUSE_BMAP message + * - add FUSE_DESTROY message + * * 7.9: * - new fuse_getattr_in input argument of GETATTR * - add lk_flags in fuse_lk_in @@ -133,6 +170,30 @@ * * 7.31 * - add FUSE_WRITE_KILL_PRIV flag + * - add FUSE_SETUPMAPPING and FUSE_REMOVEMAPPING + * - add map_alignment to fuse_init_out, add FUSE_MAP_ALIGNMENT flag + * + * 7.32 + * - add flags to fuse_attr, add FUSE_ATTR_SUBMOUNT, add FUSE_SUBMOUNTS + * + * 7.33 + * - add FUSE_HANDLE_KILLPRIV_V2, FUSE_WRITE_KILL_SUIDGID, FATTR_KILL_SUIDGID + * - add FUSE_OPEN_KILL_SUIDGID + * - extend fuse_setxattr_in, add FUSE_SETXATTR_EXT + * - add FUSE_SETXATTR_ACL_KILL_SGID + * + * 7.34 + * - add FUSE_SYNCFS + * + * 7.35 + * - add FOPEN_NOFLUSH + * + * 7.36 + * - extend fuse_init_in with reserved fields, add FUSE_INIT_EXT init flag + * - add flags2 to fuse_init_in and fuse_init_out + * - add FUSE_SECURITY_CTX init flag + * - add security context to create, mkdir, symlink, and mknod requests + * - add FUSE_HAS_INODE_DAX, FUSE_ATTR_DAX */ #ifndef _LINUX_FUSE_H @@ -168,7 +229,7 @@ #define FUSE_KERNEL_VERSION 7 /** Minor version number of this interface */ -#define FUSE_KERNEL_MINOR_VERSION 31 +#define FUSE_KERNEL_MINOR_VERSION 36 /** The node ID of the root inode */ #define FUSE_ROOT_ID 1 @@ -192,7 +253,7 @@ struct fuse_attr { uint32_t gid; uint32_t rdev; uint32_t blksize; - uint32_t padding; + uint32_t flags; }; struct fuse_kstatfs { @@ -229,6 +290,7 @@ struct fuse_file_lock { #define FATTR_MTIME_NOW (1 << 8) #define FATTR_LOCKOWNER (1 << 9) #define FATTR_CTIME (1 << 10) +#define FATTR_KILL_SUIDGID (1 << 11) /** * Flags returned by the OPEN request @@ -238,12 +300,14 @@ struct fuse_file_lock { * FOPEN_NONSEEKABLE: the file is not seekable * FOPEN_CACHE_DIR: allow caching this directory * FOPEN_STREAM: the file is stream-like (no file position at all) + * FOPEN_NOFLUSH: don't flush data cache on close (unless FUSE_WRITEBACK_CACHE) */ #define FOPEN_DIRECT_IO (1 << 0) #define FOPEN_KEEP_CACHE (1 << 1) #define FOPEN_NONSEEKABLE (1 << 2) #define FOPEN_CACHE_DIR (1 << 3) #define FOPEN_STREAM (1 << 4) +#define FOPEN_NOFLUSH (1 << 5) /** * INIT request/reply flags @@ -274,6 +338,21 @@ struct fuse_file_lock { * FUSE_CACHE_SYMLINKS: cache READLINK responses * FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir * FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request + * FUSE_MAP_ALIGNMENT: init_out.map_alignment contains log2(byte alignment) for + * foffset and moffset fields in struct + * fuse_setupmapping_out and fuse_removemapping_one. + * FUSE_SUBMOUNTS: kernel supports auto-mounting directory submounts + * FUSE_HANDLE_KILLPRIV_V2: fs kills suid/sgid/cap on write/chown/trunc. + * Upon write/truncate suid/sgid is only killed if caller + * does not have CAP_FSETID. Additionally upon + * write/truncate sgid is killed only if file has group + * execute permission. (Same as Linux VFS behavior). + * FUSE_SETXATTR_EXT: Server supports extended struct fuse_setxattr_in + * FUSE_INIT_EXT: extended fuse_init_in request + * FUSE_INIT_RESERVED: reserved, do not use + * FUSE_SECURITY_CTX: add security context to create, mkdir, symlink, and + * mknod + * FUSE_HAS_INODE_DAX: use per inode DAX */ #define FUSE_ASYNC_READ (1 << 0) #define FUSE_POSIX_LOCKS (1 << 1) @@ -301,7 +380,27 @@ struct fuse_file_lock { #define FUSE_CACHE_SYMLINKS (1 << 23) #define FUSE_NO_OPENDIR_SUPPORT (1 << 24) #define FUSE_EXPLICIT_INVAL_DATA (1 << 25) -#define FUSE_PASSTHROUGH (1 << 31) +#define FUSE_MAP_ALIGNMENT (1 << 26) +#define FUSE_SUBMOUNTS (1 << 27) +#define FUSE_HANDLE_KILLPRIV_V2 (1 << 28) +#define FUSE_SETXATTR_EXT (1 << 29) +#define FUSE_INIT_EXT (1 << 30) +#define FUSE_INIT_RESERVED (1 << 31) +/* bits 32..63 get shifted down 32 bits into the flags2 field */ +#define FUSE_SECURITY_CTX (1ULL << 32) +#define FUSE_HAS_INODE_DAX (1ULL << 33) + +/* + * For FUSE < 7.36 FUSE_PASSTHROUGH has value (1 << 31). + * This condition check is not really required, but would prevent having a + * broken commit in the tree. + */ +#if FUSE_KERNEL_VERSION > 7 || \ + (FUSE_KERNEL_VERSION == 7 && FUSE_KERNEL_MINOR_VERSION >= 36) +#define FUSE_PASSTHROUGH (1ULL << 63) +#else +#define FUSE_PASSTHROUGH (1 << 31) +#endif /** * CUSE INIT request/reply flags @@ -331,11 +430,14 @@ struct fuse_file_lock { * * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed * FUSE_WRITE_LOCKOWNER: lock_owner field is valid - * FUSE_WRITE_KILL_PRIV: kill suid and sgid bits + * FUSE_WRITE_KILL_SUIDGID: kill suid and sgid bits */ #define FUSE_WRITE_CACHE (1 << 0) #define FUSE_WRITE_LOCKOWNER (1 << 1) -#define FUSE_WRITE_KILL_PRIV (1 << 2) +#define FUSE_WRITE_KILL_SUIDGID (1 << 2) + +/* Obsolete alias; this flag implies killing suid/sgid only. */ +#define FUSE_WRITE_KILL_PRIV FUSE_WRITE_KILL_SUIDGID /** * Read flags @@ -377,6 +479,27 @@ struct fuse_file_lock { */ #define FUSE_FSYNC_FDATASYNC (1 << 0) +/** + * fuse_attr flags + * + * FUSE_ATTR_SUBMOUNT: Object is a submount root + * FUSE_ATTR_DAX: Enable DAX for this file in per inode DAX mode + */ +#define FUSE_ATTR_SUBMOUNT (1 << 0) +#define FUSE_ATTR_DAX (1 << 1) + +/** + * Open flags + * FUSE_OPEN_KILL_SUIDGID: Kill suid and sgid if executable + */ +#define FUSE_OPEN_KILL_SUIDGID (1 << 0) + +/** + * setxattr flags + * FUSE_SETXATTR_ACL_KILL_SGID: Clear SGID when system.posix_acl_access is set + */ +#define FUSE_SETXATTR_ACL_KILL_SGID (1 << 0) + enum fuse_opcode { FUSE_LOOKUP = 1, FUSE_FORGET = 2, /* no reply */ @@ -423,12 +546,19 @@ enum fuse_opcode { FUSE_RENAME2 = 45, FUSE_LSEEK = 46, FUSE_COPY_FILE_RANGE = 47, + FUSE_SETUPMAPPING = 48, + FUSE_REMOVEMAPPING = 49, + FUSE_SYNCFS = 50, /* Android specific operations */ FUSE_CANONICAL_PATH = 2016, /* CUSE specific operations */ - CUSE_INIT = 4096 + CUSE_INIT = 4096, + + /* Reserved opcodes: helpful to detect structure endian-ness */ + CUSE_INIT_BSWAP_RESERVED = 1048576, /* CUSE_INIT << 8 */ + FUSE_INIT_BSWAP_RESERVED = 436207616, /* FUSE_INIT << 24 */ }; enum fuse_notify_code { @@ -438,7 +568,7 @@ enum fuse_notify_code { FUSE_NOTIFY_STORE = 4, FUSE_NOTIFY_RETRIEVE = 5, FUSE_NOTIFY_DELETE = 6, - FUSE_NOTIFY_CODE_MAX + FUSE_NOTIFY_CODE_MAX, }; /* The read buffer is required to be at least 8k, but may be much larger */ @@ -546,14 +676,14 @@ struct fuse_setattr_in { struct fuse_open_in { uint32_t flags; - uint32_t unused; + uint32_t open_flags; /* FUSE_OPEN_... */ }; struct fuse_create_in { uint32_t flags; uint32_t mode; uint32_t umask; - uint32_t padding; + uint32_t open_flags; /* FUSE_OPEN_... */ }; struct fuse_open_out { @@ -622,9 +752,13 @@ struct fuse_fsync_in { uint32_t padding; }; +#define FUSE_COMPAT_SETXATTR_IN_SIZE 8 + struct fuse_setxattr_in { uint32_t size; uint32_t flags; + uint32_t setxattr_flags; + uint32_t padding; }; struct fuse_getxattr_in { @@ -659,6 +793,8 @@ struct fuse_init_in { uint32_t minor; uint32_t max_readahead; uint32_t flags; + uint32_t flags2; + uint32_t unused[11]; }; #define FUSE_COMPAT_INIT_OUT_SIZE 8 @@ -674,8 +810,9 @@ struct fuse_init_out { uint32_t max_write; uint32_t time_gran; uint16_t max_pages; - uint16_t padding; - uint32_t unused[8]; + uint16_t map_alignment; + uint32_t flags2; + uint32_t unused[7]; }; #define CUSE_INIT_INFO_MAX 4096 @@ -783,9 +920,12 @@ struct fuse_dirent { char name[]; }; -#define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name) -#define FUSE_DIRENT_ALIGN(x) \ +/* Align variable length records to 64bit boundary */ +#define FUSE_REC_ALIGN(x) \ (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1)) + +#define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name) +#define FUSE_DIRENT_ALIGN(x) FUSE_REC_ALIGN(x) #define FUSE_DIRENT_SIZE(d) \ FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen) @@ -844,7 +984,8 @@ struct fuse_notify_retrieve_in { }; /* Device ioctls: */ -#define FUSE_DEV_IOC_CLONE _IOR(229, 0, uint32_t) +#define FUSE_DEV_IOC_MAGIC 229 +#define FUSE_DEV_IOC_CLONE _IOR(FUSE_DEV_IOC_MAGIC, 0, uint32_t) #define FUSE_DEV_IOC_PASSTHROUGH_OPEN_V0 _IOW(229, 1, struct fuse_passthrough_out_v0) #define FUSE_DEV_IOC_PASSTHROUGH_OPEN_V1 _IOW(229, 127, struct fuse_passthrough_out_v0) #define FUSE_DEV_IOC_PASSTHROUGH_OPEN_V2 _IOW(229, 126, uint32_t) @@ -870,6 +1011,62 @@ struct fuse_copy_file_range_in { uint64_t flags; }; +#define FUSE_SETUPMAPPING_FLAG_WRITE (1ull << 0) +#define FUSE_SETUPMAPPING_FLAG_READ (1ull << 1) +struct fuse_setupmapping_in { + /* An already open handle */ + uint64_t fh; + /* Offset into the file to start the mapping */ + uint64_t foffset; + /* Length of mapping required */ + uint64_t len; + /* Flags, FUSE_SETUPMAPPING_FLAG_* */ + uint64_t flags; + /* Offset in Memory Window */ + uint64_t moffset; +}; + +struct fuse_removemapping_in { + /* number of fuse_removemapping_one follows */ + uint32_t count; +}; + +struct fuse_removemapping_one { + /* Offset into the dax window start the unmapping */ + uint64_t moffset; + /* Length of mapping required */ + uint64_t len; +}; + +#define FUSE_REMOVEMAPPING_MAX_ENTRY \ + (PAGE_SIZE / sizeof(struct fuse_removemapping_one)) + +struct fuse_syncfs_in { + uint64_t padding; +}; + +/* + * For each security context, send fuse_secctx with size of security context + * fuse_secctx will be followed by security context name and this in turn + * will be followed by actual context label. + * fuse_secctx, name, context + */ +struct fuse_secctx { + uint32_t size; + uint32_t padding; +}; + +/* + * Contains the information about how many fuse_secctx structures are being + * sent and what's the total size of all security contexts (including + * size of fuse_secctx_header). + * + */ +struct fuse_secctx_header { + uint32_t size; + uint32_t nr_secctx; +}; + /** Export fuse_args only for bpf */ #ifdef __KERNEL__ struct fuse_mount; -- cgit v1.2.3