diff options
Diffstat (limited to 'extlinux')
| -rw-r--r-- | extlinux/Makefile | 1 | ||||
| -rw-r--r-- | extlinux/main.c | 313 | ||||
| -rw-r--r-- | extlinux/misc.h | 50 | ||||
| -rw-r--r-- | extlinux/xfs.h | 25 | ||||
| -rw-r--r-- | extlinux/xfs_fs.h | 501 | ||||
| -rw-r--r-- | extlinux/xfs_sb.h | 476 | ||||
| -rw-r--r-- | extlinux/xfs_types.h | 135 |
7 files changed, 1463 insertions, 38 deletions
diff --git a/extlinux/Makefile b/extlinux/Makefile index 6cde574e..f20a71db 100644 --- a/extlinux/Makefile +++ b/extlinux/Makefile @@ -32,6 +32,7 @@ SRCS = main.c \ ../libinstaller/setadv.c \ ../libinstaller/advio.c \ ../libinstaller/bootsect_bin.c \ + ../libinstaller/ldlinuxc32_bin.c \ ../libinstaller/ldlinux_bin.c OBJS = $(patsubst %.c,%.o,$(notdir $(SRCS))) diff --git a/extlinux/main.c b/extlinux/main.c index dbf538a1..aa20e1bd 100644 --- a/extlinux/main.c +++ b/extlinux/main.c @@ -14,7 +14,8 @@ /* * extlinux.c * - * Install the syslinux boot block on an fat, ntfs, ext2/3/4 and btrfs filesystem + * Install the syslinux boot block on an fat, ntfs, ext2/3/4, btrfs and xfs + * filesystem. */ #define _GNU_SOURCE /* Enable everything */ @@ -46,6 +47,10 @@ #include "btrfs.h" #include "fat.h" #include "ntfs.h" +#include "xfs.h" +#include "xfs_types.h" +#include "xfs_sb.h" +#include "misc.h" #include "../version.h" #include "syslxint.h" #include "syslxcom.h" /* common functions shared with extlinux and syslinux */ @@ -64,6 +69,13 @@ #define EXT2_SUPER_OFFSET 1024 #endif +/* Since we have unused 2048 bytes in the primary AG of an XFS partition, + * we will use the first 0~512 bytes starting from 2048 for the Syslinux + * boot sector. + */ +#define XFS_BOOTSECT_OFFSET (4 << SECTOR_SHIFT) +#define XFS_SUPPORTED_BLOCKSIZE 4096 /* 4 KiB filesystem block size */ + /* the btrfs partition first 64K blank area is used to store boot sector and boot image, the boot sector is from 0~512, the boot image starts after */ #define BTRFS_BOOTSECT_AREA 65536 @@ -295,7 +307,8 @@ static int patch_file_and_bootblock(int fd, const char *dir, int devfd) nsect = (boot_image_len + SECTOR_SIZE - 1) >> SECTOR_SHIFT; nsect += 2; /* Two sectors for the ADV */ sectp = alloca(sizeof(sector_t) * nsect); - if (fs_type == EXT2 || fs_type == VFAT || fs_type == NTFS) { + if (fs_type == EXT2 || fs_type == VFAT || fs_type == NTFS || + fs_type == XFS) { if (sectmap(fd, sectp, nsect)) { perror("bmap"); exit(1); @@ -328,6 +341,7 @@ int install_bootblock(int fd, const char *device) struct btrfs_super_block sb2; struct fat_boot_sector sb3; struct ntfs_boot_sector sb4; + xfs_sb_t sb5; bool ok = false; if (fs_type == EXT2) { @@ -335,6 +349,7 @@ int install_bootblock(int fd, const char *device) perror("reading superblock"); return 1; } + if (sb.s_magic == EXT2_SUPER_MAGIC) ok = true; } else if (fs_type == BTRFS) { @@ -350,6 +365,7 @@ int install_bootblock(int fd, const char *device) perror("reading fat superblock"); return 1; } + if (fat_check_sb_fields(&sb3)) ok = true; } else if (fs_type == NTFS) { @@ -360,12 +376,34 @@ int install_bootblock(int fd, const char *device) if (ntfs_check_sb_fields(&sb4)) ok = true; + } else if (fs_type == XFS) { + if (xpread(fd, &sb5, sizeof sb5, 0) != sizeof sb5) { + perror("reading xfs superblock"); + return 1; + } + + if (sb5.sb_magicnum == *(u32 *)XFS_SB_MAGIC) { + if (be32_to_cpu(sb5.sb_blocksize) != XFS_SUPPORTED_BLOCKSIZE) { + fprintf(stderr, + "You need to have 4 KiB filesystem block size for " + " being able to install Syslinux in your XFS " + "partition (because there is no enough space in MBR to " + "determine where Syslinux bootsector can be installed " + "regardless the filesystem block size)\n"); + return 1; + } + + ok = true; + } } + if (!ok) { - fprintf(stderr, "no fat, ntfs, ext2/3/4 or btrfs superblock found on %s\n", - device); + fprintf(stderr, + "no fat, ntfs, ext2/3/4, btrfs or xfs superblock found on %s\n", + device); return 1; } + if (fs_type == VFAT) { struct fat_boot_sector *sbs = (struct fat_boot_sector *)syslinux_bootsect; if (xpwrite(fd, &sbs->FAT_bsHead, FAT_bsHeadLen, 0) != FAT_bsHeadLen || @@ -385,6 +423,12 @@ int install_bootblock(int fd, const char *device) perror("writing ntfs bootblock"); return 1; } + } else if (fs_type == XFS) { + if (xpwrite(fd, syslinux_bootsect, syslinux_bootsect_len, + XFS_BOOTSECT_OFFSET) != syslinux_bootsect_len) { + perror("writing xfs bootblock"); + return 1; + } } else { if (xpwrite(fd, syslinux_bootsect, syslinux_bootsect_len, 0) != syslinux_bootsect_len) { @@ -396,18 +440,66 @@ int install_bootblock(int fd, const char *device) return 0; } +static int rewrite_boot_image(int devfd, const char *path, const char *filename) +{ + int fd; + int ret; + int modbytes; + + /* Let's create LDLINUX.SYS file again (if it already exists, of course) */ + fd = open(filename, O_WRONLY | O_TRUNC | O_CREAT | O_SYNC, + S_IRUSR | S_IRGRP | S_IROTH); + if (fd < 0) { + perror(filename); + return -1; + } + + /* Write boot image data into LDLINUX.SYS file */ + ret = xpwrite(fd, boot_image, boot_image_len, 0); + if (ret != boot_image_len) { + perror("writing bootblock"); + goto error; + } + + /* Write ADV */ + ret = xpwrite(fd, syslinux_adv, 2 * ADV_SIZE, boot_image_len); + if (ret != 2 * ADV_SIZE) { + fprintf(stderr, "%s: write failure on %s\n", program, filename); + goto error; + } + + /* Map the file, and patch the initial sector accordingly */ + modbytes = patch_file_and_bootblock(fd, path, devfd); + + /* Write the patch area again - this relies on the file being overwritten + * in place! */ + ret = xpwrite(fd, boot_image, modbytes, 0); + if (ret != modbytes) { + fprintf(stderr, "%s: write failure on %s\n", program, filename); + goto error; + } + + return fd; + +error: + close(fd); + + return -1; +} + int ext2_fat_install_file(const char *path, int devfd, struct stat *rst) { - char *file, *oldfile; + char *file, *oldfile, *c32file; int fd = -1, dirfd = -1; - int modbytes; - int r1, r2; + int r1, r2, r3; r1 = asprintf(&file, "%s%sldlinux.sys", path, path[0] && path[strlen(path) - 1] == '/' ? "" : "/"); r2 = asprintf(&oldfile, "%s%sextlinux.sys", path, path[0] && path[strlen(path) - 1] == '/' ? "" : "/"); - if (r1 < 0 || !file || r2 < 0 || !oldfile) { + r3 = asprintf(&c32file, "%s%sldlinux.c32", + path, path[0] && path[strlen(path) - 1] == '/' ? "" : "/"); + if (r1 < 0 || !file || r2 < 0 || !oldfile || r3 < 0 || !c32file) { perror(program); return 1; } @@ -429,30 +521,9 @@ int ext2_fat_install_file(const char *path, int devfd, struct stat *rst) } close(fd); - fd = open(file, O_WRONLY | O_TRUNC | O_CREAT | O_SYNC, - S_IRUSR | S_IRGRP | S_IROTH); - if (fd < 0) { - perror(file); + fd = rewrite_boot_image(devfd, path, file); + if (fd < 0) goto bail; - } - - /* Write it the first time */ - if (xpwrite(fd, boot_image, boot_image_len, 0) != boot_image_len || - xpwrite(fd, syslinux_adv, 2 * ADV_SIZE, - boot_image_len) != 2 * ADV_SIZE) { - fprintf(stderr, "%s: write failure on %s\n", program, file); - goto bail; - } - - /* Map the file, and patch the initial sector accordingly */ - modbytes = patch_file_and_bootblock(fd, path, devfd); - - /* Write the patch area again - this relies on the file being - overwritten in place! */ - if (xpwrite(fd, boot_image, modbytes, 0) != modbytes) { - fprintf(stderr, "%s: write failure on %s\n", program, file); - goto bail; - } /* Attempt to set immutable flag and remove all write access */ /* Only set immutable flag if file is owned by root */ @@ -474,8 +545,22 @@ int ext2_fat_install_file(const char *path, int devfd, struct stat *rst) unlink(oldfile); } + fd = open(c32file, O_WRONLY | O_TRUNC | O_CREAT | O_SYNC, + S_IRUSR | S_IRGRP | S_IROTH); + if (fd < 0) { + perror(c32file); + goto bail; + } + + r3 = xpwrite(fd, syslinux_ldlinuxc32, syslinux_ldlinuxc32_len, 0); + if (r3 != syslinux_ldlinuxc32_len) { + fprintf(stderr, "%s: write failure on %s\n", program, c32file); + goto bail; + } + free(file); free(oldfile); + free(c32file); return 0; bail: @@ -486,6 +571,7 @@ bail: free(file); free(oldfile); + free(c32file); return 1; } @@ -494,6 +580,9 @@ bail: since the cow feature of btrfs will move the ldlinux.sys every where */ int btrfs_install_file(const char *path, int devfd, struct stat *rst) { + char *file; + int fd, rv; + patch_file_and_bootblock(-1, path, devfd); if (xpwrite(devfd, boot_image, boot_image_len, BTRFS_EXTLINUX_OFFSET) != boot_image_len) { @@ -511,7 +600,125 @@ int btrfs_install_file(const char *path, int devfd, struct stat *rst) perror(path); return 1; } + + /* + * Note that we *can* install ldinux.c32 as a regular file because + * it doesn't need to be within the first 64K. The Syslinux core + * has enough smarts to search the btrfs dirs and find this file. + */ + rv = asprintf(&file, "%s%sldlinux.c32", + path, path[0] && path[strlen(path) - 1] == '/' ? "" : "/"); + if (rv < 0 || !file) { + perror(program); + return 1; + } + + fd = open(file, O_WRONLY | O_TRUNC | O_CREAT | O_SYNC, + S_IRUSR | S_IRGRP | S_IROTH); + if (fd < 0) { + perror(file); + free(file); + return 1; + } + + rv = xpwrite(fd, syslinux_ldlinuxc32, syslinux_ldlinuxc32_len, 0); + if (rv != (int)syslinux_ldlinuxc32_len) { + fprintf(stderr, "%s: write failure on %s\n", program, file); + rv = 1; + } else + rv = 0; + + close(fd); + free(file); + return rv; +} + +/* + * Due to historical reasons (SGI IRIX's design of disk layouts), the first + * sector in the primary AG on XFS filesystems contains the superblock, which is + * a problem with bootloaders that rely on BIOSes (that load VBRs which are + * (located in the first sector of the partition). + * + * Thus, we need to handle this issue, otherwise Syslinux will damage the XFS's + * superblock. + */ +static int xfs_install_file(const char *path, int devfd, struct stat *rst) +{ + static char file[PATH_MAX + 1]; + static char c32file[PATH_MAX + 1]; + int dirfd = -1; + int fd = -1; + int retval; + + snprintf(file, PATH_MAX + 1, "%s%sldlinux.sys", path, + path[0] && path[strlen(path) - 1] == '/' ? "" : "/"); + snprintf(c32file, PATH_MAX + 1, "%s%sldlinux.c32", path, + path[0] && path[strlen(path) - 1] == '/' ? "" : "/"); + + dirfd = open(path, O_RDONLY | O_DIRECTORY); + if (dirfd < 0) { + perror(path); + goto bail; + } + + fd = open(file, O_RDONLY); + if (fd < 0) { + if (errno != ENOENT) { + perror(file); + goto bail; + } + } else { + clear_attributes(fd); + } + + close(fd); + + fd = rewrite_boot_image(devfd, path, file); + if (fd < 0) + goto bail; + + /* Attempt to set immutable flag and remove all write access */ + /* Only set immutable flag if file is owned by root */ + set_attributes(fd); + + if (fstat(fd, rst)) { + perror(file); + goto bail; + } + + close(dirfd); + close(fd); + + dirfd = -1; + fd = -1; + + fd = open(c32file, O_WRONLY | O_TRUNC | O_CREAT | O_SYNC, + S_IRUSR | S_IRGRP | S_IROTH); + if (fd < 0) { + perror(c32file); + goto bail; + } + + retval = xpwrite(fd, syslinux_ldlinuxc32, syslinux_ldlinuxc32_len, 0); + if (retval != (int)syslinux_ldlinuxc32_len) { + fprintf(stderr, "%s: write failure on %s\n", program, file); + goto bail; + } + + close(fd); + + sync(); + return 0; + +bail: + if (dirfd >= 0) + close(dirfd); + + if (fd >= 0) + close(fd); + + return 1; } /* @@ -748,11 +955,14 @@ static char * get_default_subvol(char * rootdir, char * subvol) static int install_file(const char *path, int devfd, struct stat *rst) { - if (fs_type == EXT2 || fs_type == VFAT || fs_type == NTFS) - return ext2_fat_install_file(path, devfd, rst); - else if (fs_type == BTRFS) - return btrfs_install_file(path, devfd, rst); - return 1; + if (fs_type == EXT2 || fs_type == VFAT || fs_type == NTFS) + return ext2_fat_install_file(path, devfd, rst); + else if (fs_type == BTRFS) + return btrfs_install_file(path, devfd, rst); + else if (fs_type == XFS) + return xfs_install_file(path, devfd, rst); + + return 1; } #ifdef __KLIBC__ @@ -847,14 +1057,22 @@ static const char *find_device(const char *mtab_file, dev_t dev) } break; + case XFS: + if (!strcmp(mnt->mnt_type, "xfs") && !stat(mnt->mnt_fsname, &dst) && + dst.st_rdev == dev) { + done = true; + break; + } case NONE: break; } + if (done) { devname = strdup(mnt->mnt_fsname); break; } } + endmntent(mtab); return devname; @@ -915,6 +1133,8 @@ static const char *find_device_mountinfo(const char *path, dev_t dev) struct stat st; m = find_mount(path, NULL); + if (!m) + return NULL; if (m->devpath[0] == '/' && m->dev == dev && !stat(m->devpath, &st) && S_ISBLK(st.st_mode) && st.st_rdev == dev) @@ -1098,6 +1318,7 @@ static int open_device(const char *path, struct stat *st, const char **_devname) fprintf(stderr, "%s: statfs %s: %s\n", program, path, strerror(errno)); return -1; } + if (sfs.f_type == EXT2_SUPER_MAGIC) fs_type = EXT2; else if (sfs.f_type == BTRFS_SUPER_MAGIC) @@ -1106,10 +1327,13 @@ static int open_device(const char *path, struct stat *st, const char **_devname) fs_type = VFAT; else if (sfs.f_type == NTFS_SB_MAGIC || sfs.f_type == FUSE_SUPER_MAGIC /* ntfs-3g */) - fs_type = NTFS; + fs_type = NTFS; + else if (sfs.f_type == XFS_SUPER_MAGIC) + fs_type = XFS; if (!fs_type) { - fprintf(stderr, "%s: not a fat, ntfs, ext2/3/4 or btrfs filesystem: %s\n", + fprintf(stderr, + "%s: not a fat, ntfs, ext2/3/4, btrfs or xfs filesystem: %s\n", program, path); return -1; } @@ -1143,6 +1367,16 @@ static int btrfs_read_adv(int devfd) return syslinux_validate_adv(syslinux_adv) ? 1 : 0; } +static inline int xfs_read_adv(int devfd) +{ + const size_t adv_size = 2 * ADV_SIZE; + + if (xpread(devfd, syslinux_adv, adv_size, boot_image_len) != adv_size) + return -1; + + return syslinux_validate_adv(syslinux_adv) ? 1 : 0; +} + static int ext_read_adv(const char *path, int devfd, const char **namep) { int err; @@ -1151,6 +1385,9 @@ static int ext_read_adv(const char *path, int devfd, const char **namep) if (fs_type == BTRFS) { /* btrfs "ldlinux.sys" is in 64k blank area */ return btrfs_read_adv(devfd); + } else if (fs_type == XFS) { + /* XFS "ldlinux.sys" is in the first 2048 bytes of the primary AG */ + return xfs_read_adv(devfd); } else { err = read_adv(path, name = "ldlinux.sys"); if (err == 2) /* ldlinux.sys does not exist */ diff --git a/extlinux/misc.h b/extlinux/misc.h new file mode 100644 index 00000000..7f2f1b33 --- /dev/null +++ b/extlinux/misc.h @@ -0,0 +1,50 @@ +/* + * Copyright (c) 2012 Paulo Alcantara <pcacjr@zytor.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef MISC_H_ +#define MISC_H_ + +/* Return a 64-bit litte-endian value from a given 64-bit big-endian one */ +static inline uint64_t be64_to_cpu(uint64_t val) +{ + return (uint64_t)((((uint64_t)val & (uint64_t)0x00000000000000ffULL) << 56) | + (((uint64_t)val & (uint64_t)0x000000000000ff00ULL) << 40) | + (((uint64_t)val & (uint64_t)0x0000000000ff0000ULL) << 24) | + (((uint64_t)val & (uint64_t)0x00000000ff000000ULL) << 8) | + (((uint64_t)val & (uint64_t)0x000000ff00000000ULL) >> 8) | + (((uint64_t)val & (uint64_t)0x0000ff0000000000ULL) >> 24) | + (((uint64_t)val & (uint64_t)0x00ff000000000000ULL) >> 40) | + (((uint64_t)val & (uint64_t)0xff00000000000000ULL) >> 56)); +} + +/* Return a 32-bit litte-endian value from a given 32-bit big-endian one */ +static inline uint32_t be32_to_cpu(uint32_t val) +{ + return (uint32_t)((((uint32_t)val & (uint32_t)0x000000ffUL) << 24) | + (((uint32_t)val & (uint32_t)0x0000ff00UL) << 8) | + (((uint32_t)val & (uint32_t)0x00ff0000UL) >> 8) | + (((uint32_t)val & (uint32_t)0xff000000UL) >> 24)); +} + +/* Return a 16-bit litte-endian value from a given 16-bit big-endian one */ +static inline uint16_t be16_to_cpu(uint16_t val) +{ + return (uint16_t)((((uint16_t)val & (uint16_t)0x00ffU) << 8) | + (((uint16_t)val & (uint16_t)0xff00U) >> 8)); +} + +#endif /* MISC_H_ */ diff --git a/extlinux/xfs.h b/extlinux/xfs.h new file mode 100644 index 00000000..412c2662 --- /dev/null +++ b/extlinux/xfs.h @@ -0,0 +1,25 @@ +/* + * Copyright (c) 2012 Paulo Alcantara <pcacjr@zytor.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the + * Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +*/ + +#ifndef XFS_H_ +#define XFS_H_ + +#define XFS_SUPER_MAGIC 0x58465342 + +#endif /* XFS_H_ */ diff --git a/extlinux/xfs_fs.h b/extlinux/xfs_fs.h new file mode 100644 index 00000000..587820ec --- /dev/null +++ b/extlinux/xfs_fs.h @@ -0,0 +1,501 @@ +/* + * Taken from Linux kernel tree (linux/fs/xfs) + * + * Copyright (c) 1995-2005 Silicon Graphics, Inc. + * All Rights Reserved. + * + * Copyright (c) 2012 Paulo Alcantara <pcacjr@zytor.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public License + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this program; if not, write the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef XFS_FS_H_ +#define XFS_FS_H_ + +/* + * SGI's XFS filesystem's major stuff (constants, structures) + */ + +/* + * Direct I/O attribute record used with XFS_IOC_DIOINFO + * d_miniosz is the min xfer size, xfer size multiple and file seek offset + * alignment. + */ +struct dioattr { + uint32_t d_mem; /* data buffer memory alignment */ + uint32_t d_miniosz; /* min xfer size */ + uint32_t d_maxiosz; /* max xfer size */ +}; + +/* + * Structure for XFS_IOC_FSGETXATTR[A] and XFS_IOC_FSSETXATTR. + */ +struct fsxattr { + uint32_t fsx_xflags; /* xflags field value (get/set) */ + uint32_t fsx_extsize; /* extsize field value (get/set)*/ + uint32_t fsx_nextents; /* nextents field value (get) */ + uint32_t fsx_projid; /* project identifier (get/set) */ + unsigned char fsx_pad[12]; +}; + +/* + * Flags for the bs_xflags/fsx_xflags field + * There should be a one-to-one correspondence between these flags and the + * XFS_DIFLAG_s. + */ +#define XFS_XFLAG_REALTIME 0x00000001 /* data in realtime volume */ +#define XFS_XFLAG_PREALLOC 0x00000002 /* preallocated file extents */ +#define XFS_XFLAG_IMMUTABLE 0x00000008 /* file cannot be modified */ +#define XFS_XFLAG_APPEND 0x00000010 /* all writes append */ +#define XFS_XFLAG_SYNC 0x00000020 /* all writes synchronous */ +#define XFS_XFLAG_NOATIME 0x00000040 /* do not update access time */ +#define XFS_XFLAG_NODUMP 0x00000080 /* do not include in backups */ +#define XFS_XFLAG_RTINHERIT 0x00000100 /* create with rt bit set */ +#define XFS_XFLAG_PROJINHERIT 0x00000200 /* create with parents projid */ +#define XFS_XFLAG_NOSYMLINKS 0x00000400 /* disallow symlink creation */ +#define XFS_XFLAG_EXTSIZE 0x00000800 /* extent size allocator hint */ +#define XFS_XFLAG_EXTSZINHERIT 0x00001000 /* inherit inode extent size */ +#define XFS_XFLAG_NODEFRAG 0x00002000 /* do not defragment */ +#define XFS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */ +#define XFS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */ + +/* + * Structure for XFS_IOC_GETBMAP. + * On input, fill in bmv_offset and bmv_length of the first structure + * to indicate the area of interest in the file, and bmv_entries with + * the number of array elements given back. The first structure is + * updated on return to give the offset and length for the next call. + */ +struct getbmap { + int64_t bmv_offset; /* file offset of segment in blocks */ + int64_t bmv_block; /* starting block (64-bit daddr_t) */ + int64_t bmv_length; /* length of segment, blocks */ + int32_t bmv_count; /* # of entries in array incl. 1st */ + int32_t bmv_entries; /* # of entries filled in (output) */ +}; + +/* + * Structure for XFS_IOC_GETBMAPX. Fields bmv_offset through bmv_entries + * are used exactly as in the getbmap structure. The getbmapx structure + * has additional bmv_iflags and bmv_oflags fields. The bmv_iflags field + * is only used for the first structure. It contains input flags + * specifying XFS_IOC_GETBMAPX actions. The bmv_oflags field is filled + * in by the XFS_IOC_GETBMAPX command for each returned structure after + * the first. + */ +struct getbmapx { + int64_t bmv_offset; /* file offset of segment in blocks */ + int64_t bmv_block; /* starting block (64-bit daddr_t) */ + int64_t bmv_length; /* length of segment, blocks */ + int32_t bmv_count; /* # of entries in array incl. 1st */ + int32_t bmv_entries; /* # of entries filled in (output). */ + int32_t bmv_iflags; /* input flags (1st structure) */ + int32_t bmv_oflags; /* output flags (after 1st structure)*/ + int32_t bmv_unused1; /* future use */ + int32_t bmv_unused2; /* future use */ +}; + +/* bmv_iflags values - set by XFS_IOC_GETBMAPX caller. */ +#define BMV_IF_ATTRFORK 0x1 /* return attr fork rather than data */ +#define BMV_IF_NO_DMAPI_READ 0x2 /* Do not generate DMAPI read event */ +#define BMV_IF_PREALLOC 0x4 /* rtn status BMV_OF_PREALLOC if req */ +#define BMV_IF_DELALLOC 0x8 /* rtn status BMV_OF_DELALLOC if req */ +#define BMV_IF_NO_HOLES 0x10 /* Do not return holes */ +#define BMV_IF_VALID \ + (BMV_IF_ATTRFORK|BMV_IF_NO_DMAPI_READ|BMV_IF_PREALLOC| \ + BMV_IF_DELALLOC|BMV_IF_NO_HOLES) + +/* bmv_oflags values - returned for each non-header segment */ +#define BMV_OF_PREALLOC 0x1 /* segment = unwritten pre-allocation */ +#define BMV_OF_DELALLOC 0x2 /* segment = delayed allocation */ +#define BMV_OF_LAST 0x4 /* segment is the last in the file */ + +/* + * Structure for XFS_IOC_FSSETDM. + * For use by backup and restore programs to set the XFS on-disk inode + * fields di_dmevmask and di_dmstate. These must be set to exactly and + * only values previously obtained via xfs_bulkstat! (Specifically the + * xfs_bstat_t fields bs_dmevmask and bs_dmstate.) + */ +struct fsdmidata { + uint32_t fsd_dmevmask; /* corresponds to di_dmevmask */ + __u16 fsd_padding; + __u16 fsd_dmstate; /* corresponds to di_dmstate */ +}; + +/* + * File segment locking set data type for 64 bit access. + * Also used for all the RESV/FREE interfaces. + */ +typedef struct xfs_flock64 { + __s16 l_type; + __s16 l_whence; + int64_t l_start; + int64_t l_len; /* len == 0 means until end of file */ + int32_t l_sysid; + uint32_t l_pid; + int32_t l_pad[4]; /* reserve area */ +} xfs_flock64_t; + +/* + * Output for XFS_IOC_FSGEOMETRY_V1 + */ +typedef struct xfs_fsop_geom_v1 { + uint32_t blocksize; /* filesystem (data) block size */ + uint32_t rtextsize; /* realtime extent size */ + uint32_t agblocks; /* fsblocks in an AG */ + uint32_t agcount; /* number of allocation groups */ + uint32_t logblocks; /* fsblocks in the log */ + uint32_t sectsize; /* (data) sector size, bytes */ + uint32_t inodesize; /* inode size in bytes */ + uint32_t imaxpct; /* max allowed inode space(%) */ + uint64_t datablocks; /* fsblocks in data subvolume */ + uint64_t rtblocks; /* fsblocks in realtime subvol */ + uint64_t rtextents; /* rt extents in realtime subvol*/ + uint64_t logstart; /* starting fsblock of the log */ + unsigned char uuid[16]; /* unique id of the filesystem */ + uint32_t sunit; /* stripe unit, fsblocks */ + uint32_t swidth; /* stripe width, fsblocks */ + int32_t version; /* structure version */ + uint32_t flags; /* superblock version flags */ + uint32_t logsectsize; /* log sector size, bytes */ + uint32_t rtsectsize; /* realtime sector size, bytes */ + uint32_t dirblocksize; /* directory block size, bytes */ +} xfs_fsop_geom_v1_t; + +/* + * Output for XFS_IOC_FSGEOMETRY + */ +typedef struct xfs_fsop_geom { + uint32_t blocksize; /* filesystem (data) block size */ + uint32_t rtextsize; /* realtime extent size */ + uint32_t agblocks; /* fsblocks in an AG */ + uint32_t agcount; /* number of allocation groups */ + uint32_t logblocks; /* fsblocks in the log */ + uint32_t sectsize; /* (data) sector size, bytes */ + uint32_t inodesize; /* inode size in bytes */ + uint32_t imaxpct; /* max allowed inode space(%) */ + uint64_t datablocks; /* fsblocks in data subvolume */ + uint64_t rtblocks; /* fsblocks in realtime subvol */ + uint64_t rtextents; /* rt extents in realtime subvol*/ + uint64_t logstart; /* starting fsblock of the log */ + unsigned char uuid[16]; /* unique id of the filesystem */ + uint32_t sunit; /* stripe unit, fsblocks */ + uint32_t swidth; /* stripe width, fsblocks */ + int32_t version; /* structure version */ + uint32_t flags; /* superblock version flags */ + uint32_t logsectsize; /* log sector size, bytes */ + uint32_t rtsectsize; /* realtime sector size, bytes */ + uint32_t dirblocksize; /* directory block size, bytes */ + uint32_t logsunit; /* log stripe unit, bytes */ +} xfs_fsop_geom_t; + +/* Output for XFS_FS_COUNTS */ +typedef struct xfs_fsop_counts { + uint64_t freedata; /* free data section blocks */ + uint64_t freertx; /* free rt extents */ + uint64_t freeino; /* free inodes */ + uint64_t allocino; /* total allocated inodes */ +} xfs_fsop_counts_t; + +/* Input/Output for XFS_GET_RESBLKS and XFS_SET_RESBLKS */ +typedef struct xfs_fsop_resblks { + uint64_t resblks; + uint64_t resblks_avail; +} xfs_fsop_resblks_t; + +#define XFS_FSOP_GEOM_VERSION 0 + +#define XFS_FSOP_GEOM_FLAGS_ATTR 0x0001 /* attributes in use */ +#define XFS_FSOP_GEOM_FLAGS_NLINK 0x0002 /* 32-bit nlink values */ +#define XFS_FSOP_GEOM_FLAGS_QUOTA 0x0004 /* quotas enabled */ +#define XFS_FSOP_GEOM_FLAGS_IALIGN 0x0008 /* inode alignment */ +#define XFS_FSOP_GEOM_FLAGS_DALIGN 0x0010 /* large data alignment */ +#define XFS_FSOP_GEOM_FLAGS_SHARED 0x0020 /* read-only shared */ +#define XFS_FSOP_GEOM_FLAGS_EXTFLG 0x0040 /* special extent flag */ +#define XFS_FSOP_GEOM_FLAGS_DIRV2 0x0080 /* directory version 2 */ +#define XFS_FSOP_GEOM_FLAGS_LOGV2 0x0100 /* log format version 2 */ +#define XFS_FSOP_GEOM_FLAGS_SECTOR 0x0200 /* sector sizes >1BB */ +#define XFS_FSOP_GEOM_FLAGS_ATTR2 0x0400 /* inline attributes rework */ +#define XFS_FSOP_GEOM_FLAGS_DIRV2CI 0x1000 /* ASCII only CI names */ +#define XFS_FSOP_GEOM_FLAGS_LAZYSB 0x4000 /* lazy superblock counters */ + + +/* + * Minimum and maximum sizes need for growth checks + */ +#define XFS_MIN_AG_BLOCKS 64 +#define XFS_MIN_LOG_BLOCKS 512ULL +#define XFS_MAX_LOG_BLOCKS (1024 * 1024ULL) +#define XFS_MIN_LOG_BYTES (10 * 1024 * 1024ULL) + +/* keep the maximum size under 2^31 by a small amount */ +#define XFS_MAX_LOG_BYTES \ + ((2 * 1024 * 1024 * 1024ULL) - XFS_MIN_LOG_BYTES) + +/* Used for sanity checks on superblock */ +#define XFS_MAX_DBLOCKS(s) ((xfs_drfsbno_t)(s)->sb_agcount * (s)->sb_agblocks) +#define XFS_MIN_DBLOCKS(s) ((xfs_drfsbno_t)((s)->sb_agcount - 1) * \ + (s)->sb_agblocks + XFS_MIN_AG_BLOCKS) + +/* + * Structures for XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG & XFS_IOC_FSGROWFSRT + */ +typedef struct xfs_growfs_data { + uint64_t newblocks; /* new data subvol size, fsblocks */ + uint32_t imaxpct; /* new inode space percentage limit */ +} xfs_growfs_data_t; + +typedef struct xfs_growfs_log { + uint32_t newblocks; /* new log size, fsblocks */ + uint32_t isint; /* 1 if new log is internal */ +} xfs_growfs_log_t; + +typedef struct xfs_growfs_rt { + uint64_t newblocks; /* new realtime size, fsblocks */ + uint32_t extsize; /* new realtime extent size, fsblocks */ +} xfs_growfs_rt_t; + + +/* + * Structures returned from ioctl XFS_IOC_FSBULKSTAT & XFS_IOC_FSBULKSTAT_SINGLE + */ +typedef struct xfs_bstime { + time_t tv_sec; /* seconds */ + int32_t tv_nsec; /* and nanoseconds */ +} xfs_bstime_t; + +typedef struct xfs_bstat { + uint64_t bs_ino; /* inode number */ + __u16 bs_mode; /* type and mode */ + __u16 bs_nlink; /* number of links */ + uint32_t bs_uid; /* user id */ + uint32_t bs_gid; /* group id */ + uint32_t bs_rdev; /* device value */ + int32_t bs_blksize; /* block size */ + int64_t bs_size; /* file size */ + xfs_bstime_t bs_atime; /* access time */ + xfs_bstime_t bs_mtime; /* modify time */ + xfs_bstime_t bs_ctime; /* inode change time */ + int64_t bs_blocks; /* number of blocks */ + uint32_t bs_xflags; /* extended flags */ + int32_t bs_extsize; /* extent size */ + int32_t bs_extents; /* number of extents */ + uint32_t bs_gen; /* generation count */ + __u16 bs_projid_lo; /* lower part of project id */ +#define bs_projid bs_projid_lo /* (previously just bs_projid) */ + __u16 bs_forkoff; /* inode fork offset in bytes */ + __u16 bs_projid_hi; /* higher part of project id */ + unsigned char bs_pad[10]; /* pad space, unused */ + uint32_t bs_dmevmask; /* DMIG event mask */ + __u16 bs_dmstate; /* DMIG state info */ + __u16 bs_aextents; /* attribute number of extents */ +} xfs_bstat_t; + +/* + * The user-level BulkStat Request interface structure. + */ +typedef struct xfs_fsop_bulkreq { + uint64_t __user *lastip; /* last inode # pointer */ + int32_t icount; /* count of entries in buffer */ + void __user *ubuffer;/* user buffer for inode desc. */ + int32_t __user *ocount; /* output count pointer */ +} xfs_fsop_bulkreq_t; + + +/* + * Structures returned from xfs_inumbers routine (XFS_IOC_FSINUMBERS). + */ +typedef struct xfs_inogrp { + uint64_t xi_startino; /* starting inode number */ + int32_t xi_alloccount; /* # bits set in allocmask */ + uint64_t xi_allocmask; /* mask of allocated inodes */ +} xfs_inogrp_t; + + +/* + * Error injection. + */ +typedef struct xfs_error_injection { + int32_t fd; + int32_t errtag; +} xfs_error_injection_t; + + +/* + * The user-level Handle Request interface structure. + */ +typedef struct xfs_fsop_handlereq { + uint32_t fd; /* fd for FD_TO_HANDLE */ + void __user *path; /* user pathname */ + uint32_t oflags; /* open flags */ + void __user *ihandle;/* user supplied handle */ + uint32_t ihandlen; /* user supplied length */ + void __user *ohandle;/* user buffer for handle */ + uint32_t __user *ohandlen;/* user buffer length */ +} xfs_fsop_handlereq_t; + +/* + * Compound structures for passing args through Handle Request interfaces + * xfs_fssetdm_by_handle, xfs_attrlist_by_handle, xfs_attrmulti_by_handle + * - ioctls: XFS_IOC_FSSETDM_BY_HANDLE, XFS_IOC_ATTRLIST_BY_HANDLE, and + * XFS_IOC_ATTRMULTI_BY_HANDLE + */ + +typedef struct xfs_fsop_setdm_handlereq { + struct xfs_fsop_handlereq hreq; /* handle information */ + struct fsdmidata __user *data; /* DMAPI data */ +} xfs_fsop_setdm_handlereq_t; + +typedef struct xfs_attrlist_cursor { + uint32_t opaque[4]; +} xfs_attrlist_cursor_t; + +typedef struct xfs_fsop_attrlist_handlereq { + struct xfs_fsop_handlereq hreq; /* handle interface structure */ + struct xfs_attrlist_cursor pos; /* opaque cookie, list offset */ + uint32_t flags; /* which namespace to use */ + uint32_t buflen; /* length of buffer supplied */ + void __user *buffer; /* returned names */ +} xfs_fsop_attrlist_handlereq_t; + +typedef struct xfs_attr_multiop { + uint32_t am_opcode; +#define ATTR_OP_GET 1 /* return the indicated attr's value */ +#define ATTR_OP_SET 2 /* set/create the indicated attr/value pair */ +#define ATTR_OP_REMOVE 3 /* remove the indicated attr */ + int32_t am_error; + void __user *am_attrname; + void __user *am_attrvalue; + uint32_t am_length; + uint32_t am_flags; +} xfs_attr_multiop_t; + +typedef struct xfs_fsop_attrmulti_handlereq { + struct xfs_fsop_handlereq hreq; /* handle interface structure */ + uint32_t opcount;/* count of following multiop */ + struct xfs_attr_multiop __user *ops; /* attr_multi data */ +} xfs_fsop_attrmulti_handlereq_t; + +/* + * per machine unique filesystem identifier types. + */ +typedef struct { uint32_t val[2]; } xfs_fsid_t; /* file system id type */ + +typedef struct xfs_fid { + __u16 fid_len; /* length of remainder */ + __u16 fid_pad; + uint32_t fid_gen; /* generation number */ + uint64_t fid_ino; /* 64 bits inode number */ +} xfs_fid_t; + +typedef struct xfs_handle { + union { + int64_t align; /* force alignment of ha_fid */ + xfs_fsid_t _ha_fsid; /* unique file system identifier */ + } ha_u; + xfs_fid_t ha_fid; /* file system specific file ID */ +} xfs_handle_t; +#define ha_fsid ha_u._ha_fsid + +#define XFS_HSIZE(handle) (((char *) &(handle).ha_fid.fid_pad \ + - (char *) &(handle)) \ + + (handle).ha_fid.fid_len) + +/* + * Flags for going down operation + */ +#define XFS_FSOP_GOING_FLAGS_DEFAULT 0x0 /* going down */ +#define XFS_FSOP_GOING_FLAGS_LOGFLUSH 0x1 /* flush log but not data */ +#define XFS_FSOP_GOING_FLAGS_NOLOGFLUSH 0x2 /* don't flush log nor data */ + +/* + * ioctl commands that are used by Linux filesystems + */ +#define XFS_IOC_GETXFLAGS FS_IOC_GETFLAGS +#define XFS_IOC_SETXFLAGS FS_IOC_SETFLAGS +#define XFS_IOC_GETVERSION FS_IOC_GETVERSION + +/* + * ioctl commands that replace IRIX fcntl()'s + * For 'documentation' purposed more than anything else, + * the "cmd #" field reflects the IRIX fcntl number. + */ +#define XFS_IOC_ALLOCSP _IOW ('X', 10, struct xfs_flock64) +#define XFS_IOC_FREESP _IOW ('X', 11, struct xfs_flock64) +#define XFS_IOC_DIOINFO _IOR ('X', 30, struct dioattr) +#define XFS_IOC_FSGETXATTR _IOR ('X', 31, struct fsxattr) +#define XFS_IOC_FSSETXATTR _IOW ('X', 32, struct fsxattr) +#define XFS_IOC_ALLOCSP64 _IOW ('X', 36, struct xfs_flock64) +#define XFS_IOC_FREESP64 _IOW ('X', 37, struct xfs_flock64) +#define XFS_IOC_GETBMAP _IOWR('X', 38, struct getbmap) +#define XFS_IOC_FSSETDM _IOW ('X', 39, struct fsdmidata) +#define XFS_IOC_RESVSP _IOW ('X', 40, struct xfs_flock64) +#define XFS_IOC_UNRESVSP _IOW ('X', 41, struct xfs_flock64) +#define XFS_IOC_RESVSP64 _IOW ('X', 42, struct xfs_flock64) +#define XFS_IOC_UNRESVSP64 _IOW ('X', 43, struct xfs_flock64) +#define XFS_IOC_GETBMAPA _IOWR('X', 44, struct getbmap) +#define XFS_IOC_FSGETXATTRA _IOR ('X', 45, struct fsxattr) +/* XFS_IOC_SETBIOSIZE ---- deprecated 46 */ +/* XFS_IOC_GETBIOSIZE ---- deprecated 47 */ +#define XFS_IOC_GETBMAPX _IOWR('X', 56, struct getbmap) +#define XFS_IOC_ZERO_RANGE _IOW ('X', 57, struct xfs_flock64) + +/* + * ioctl commands that replace IRIX syssgi()'s + */ +#define XFS_IOC_FSGEOMETRY_V1 _IOR ('X', 100, struct xfs_fsop_geom_v1) +#define XFS_IOC_FSBULKSTAT _IOWR('X', 101, struct xfs_fsop_bulkreq) +#define XFS_IOC_FSBULKSTAT_SINGLE _IOWR('X', 102, struct xfs_fsop_bulkreq) +#define XFS_IOC_FSINUMBERS _IOWR('X', 103, struct xfs_fsop_bulkreq) +#define XFS_IOC_PATH_TO_FSHANDLE _IOWR('X', 104, struct xfs_fsop_handlereq) +#define XFS_IOC_PATH_TO_HANDLE _IOWR('X', 105, struct xfs_fsop_handlereq) +#define XFS_IOC_FD_TO_HANDLE _IOWR('X', 106, struct xfs_fsop_handlereq) +#define XFS_IOC_OPEN_BY_HANDLE _IOWR('X', 107, struct xfs_fsop_handlereq) +#define XFS_IOC_READLINK_BY_HANDLE _IOWR('X', 108, struct xfs_fsop_handlereq) +#define XFS_IOC_SWAPEXT _IOWR('X', 109, struct xfs_swapext) +#define XFS_IOC_FSGROWFSDATA _IOW ('X', 110, struct xfs_growfs_data) +#define XFS_IOC_FSGROWFSLOG _IOW ('X', 111, struct xfs_growfs_log) +#define XFS_IOC_FSGROWFSRT _IOW ('X', 112, struct xfs_growfs_rt) +#define XFS_IOC_FSCOUNTS _IOR ('X', 113, struct xfs_fsop_counts) +#define XFS_IOC_SET_RESBLKS _IOWR('X', 114, struct xfs_fsop_resblks) +#define XFS_IOC_GET_RESBLKS _IOR ('X', 115, struct xfs_fsop_resblks) +#define XFS_IOC_ERROR_INJECTION _IOW ('X', 116, struct xfs_error_injection) +#define XFS_IOC_ERROR_CLEARALL _IOW ('X', 117, struct xfs_error_injection) +/* XFS_IOC_ATTRCTL_BY_HANDLE -- deprecated 118 */ +/* XFS_IOC_FREEZE -- FIFREEZE 119 */ +/* XFS_IOC_THAW -- FITHAW 120 */ +#define XFS_IOC_FSSETDM_BY_HANDLE _IOW ('X', 121, struct xfs_fsop_setdm_handlereq) +#define XFS_IOC_ATTRLIST_BY_HANDLE _IOW ('X', 122, struct xfs_fsop_attrlist_handlereq) +#define XFS_IOC_ATTRMULTI_BY_HANDLE _IOW ('X', 123, struct xfs_fsop_attrmulti_handlereq) +#define XFS_IOC_FSGEOMETRY _IOR ('X', 124, struct xfs_fsop_geom) +#define XFS_IOC_GOINGDOWN _IOR ('X', 125, __uint32_t) +/* XFS_IOC_GETFSUUID ---------- deprecated 140 */ + + +#ifndef HAVE_BBMACROS +/* + * Block I/O parameterization. A basic block (BB) is the lowest size of + * filesystem allocation, and must equal 512. Length units given to bio + * routines are in BB's. + */ +#define BBSHIFT 9 +#define BBSIZE (1<<BBSHIFT) +#define BBMASK (BBSIZE-1) +#define BTOBB(bytes) (((uint64_t)(bytes) + BBSIZE - 1) >> BBSHIFT) +#define BTOBBT(bytes) ((uint64_t)(bytes) >> BBSHIFT) +#define BBTOB(bbs) ((bbs) << BBSHIFT) +#endif + +#endif /* XFS_FS_H_ */ diff --git a/extlinux/xfs_sb.h b/extlinux/xfs_sb.h new file mode 100644 index 00000000..8f72d6ad --- /dev/null +++ b/extlinux/xfs_sb.h @@ -0,0 +1,476 @@ +/* + * Taken from Linux kernel tree (linux/fs/xfs) + * + * Copyright (c) 2000-2005 Silicon Graphics, Inc. + * All Rights Reserved. + * + * Copyright (c) 2012 Paulo Alcantara <pcacjr@zytor.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ +#ifndef XFS_SB_H_ +#define XFS_SB_H__ + +#include <stddef.h> + +#include <sys/types.h> +#include <uuid/uuid.h> + +/* + * Super block + * Fits into a sector-sized buffer at address 0 of each allocation group. + * Only the first of these is ever updated except during growfs. + */ + +struct xfs_buf; +struct xfs_mount; + +#define XFS_SB_MAGIC "XFSB" /* 'XFSB' */ +#define XFS_SB_VERSION_1 1 /* 5.3, 6.0.1, 6.1 */ +#define XFS_SB_VERSION_2 2 /* 6.2 - attributes */ +#define XFS_SB_VERSION_3 3 /* 6.2 - new inode version */ +#define XFS_SB_VERSION_4 4 /* 6.2+ - bitmask version */ +#define XFS_SB_VERSION_NUMBITS 0x000f +#define XFS_SB_VERSION_ALLFBITS 0xfff0 +#define XFS_SB_VERSION_SASHFBITS 0xf000 +#define XFS_SB_VERSION_REALFBITS 0x0ff0 +#define XFS_SB_VERSION_ATTRBIT 0x0010 +#define XFS_SB_VERSION_NLINKBIT 0x0020 +#define XFS_SB_VERSION_QUOTABIT 0x0040 +#define XFS_SB_VERSION_ALIGNBIT 0x0080 +#define XFS_SB_VERSION_DALIGNBIT 0x0100 +#define XFS_SB_VERSION_SHAREDBIT 0x0200 +#define XFS_SB_VERSION_LOGV2BIT 0x0400 +#define XFS_SB_VERSION_SECTORBIT 0x0800 +#define XFS_SB_VERSION_EXTFLGBIT 0x1000 +#define XFS_SB_VERSION_DIRV2BIT 0x2000 +#define XFS_SB_VERSION_BORGBIT 0x4000 /* ASCII only case-insens. */ +#define XFS_SB_VERSION_MOREBITSBIT 0x8000 +#define XFS_SB_VERSION_OKSASHFBITS \ + (XFS_SB_VERSION_EXTFLGBIT | \ + XFS_SB_VERSION_DIRV2BIT | \ + XFS_SB_VERSION_BORGBIT) +#define XFS_SB_VERSION_OKREALFBITS \ + (XFS_SB_VERSION_ATTRBIT | \ + XFS_SB_VERSION_NLINKBIT | \ + XFS_SB_VERSION_QUOTABIT | \ + XFS_SB_VERSION_ALIGNBIT | \ + XFS_SB_VERSION_DALIGNBIT | \ + XFS_SB_VERSION_SHAREDBIT | \ + XFS_SB_VERSION_LOGV2BIT | \ + XFS_SB_VERSION_SECTORBIT | \ + XFS_SB_VERSION_MOREBITSBIT) +#define XFS_SB_VERSION_OKREALBITS \ + (XFS_SB_VERSION_NUMBITS | \ + XFS_SB_VERSION_OKREALFBITS | \ + XFS_SB_VERSION_OKSASHFBITS) + +/* + * There are two words to hold XFS "feature" bits: the original + * word, sb_versionnum, and sb_features2. Whenever a bit is set in + * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set. + * + * These defines represent bits in sb_features2. + */ +#define XFS_SB_VERSION2_REALFBITS 0x00ffffff /* Mask: features */ +#define XFS_SB_VERSION2_RESERVED1BIT 0x00000001 +#define XFS_SB_VERSION2_LAZYSBCOUNTBIT 0x00000002 /* Superblk counters */ +#define XFS_SB_VERSION2_RESERVED4BIT 0x00000004 +#define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */ +#define XFS_SB_VERSION2_PARENTBIT 0x00000010 /* parent pointers */ +#define XFS_SB_VERSION2_PROJID32BIT 0x00000080 /* 32 bit project id */ + +#define XFS_SB_VERSION2_OKREALFBITS \ + (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \ + XFS_SB_VERSION2_ATTR2BIT | \ + XFS_SB_VERSION2_PROJID32BIT) +#define XFS_SB_VERSION2_OKSASHFBITS \ + (0) +#define XFS_SB_VERSION2_OKREALBITS \ + (XFS_SB_VERSION2_OKREALFBITS | \ + XFS_SB_VERSION2_OKSASHFBITS ) + +/* + * Superblock - in core version. Must match the ondisk version below. + * Must be padded to 64 bit alignment. + */ +typedef struct xfs_sb { + uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */ + uint32_t sb_blocksize; /* logical block size, bytes */ + xfs_drfsbno_t sb_dblocks; /* number of data blocks */ + xfs_drfsbno_t sb_rblocks; /* number of realtime blocks */ + xfs_drtbno_t sb_rextents; /* number of realtime extents */ + uuid_t sb_uuid; /* file system unique id */ + xfs_dfsbno_t sb_logstart; /* starting block of log if internal */ + xfs_ino_t sb_rootino; /* root inode number */ + xfs_ino_t sb_rbmino; /* bitmap inode for realtime extents */ + xfs_ino_t sb_rsumino; /* summary inode for rt bitmap */ + xfs_agblock_t sb_rextsize; /* realtime extent size, blocks */ + xfs_agblock_t sb_agblocks; /* size of an allocation group */ + xfs_agnumber_t sb_agcount; /* number of allocation groups */ + xfs_extlen_t sb_rbmblocks; /* number of rt bitmap blocks */ + xfs_extlen_t sb_logblocks; /* number of log blocks */ + uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */ + uint16_t sb_sectsize; /* volume sector size, bytes */ + uint16_t sb_inodesize; /* inode size, bytes */ + uint16_t sb_inopblock; /* inodes per block */ + char sb_fname[12]; /* file system name */ + uint8_t sb_blocklog; /* log2 of sb_blocksize */ + uint8_t sb_sectlog; /* log2 of sb_sectsize */ + uint8_t sb_inodelog; /* log2 of sb_inodesize */ + uint8_t sb_inopblog; /* log2 of sb_inopblock */ + uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */ + uint8_t sb_rextslog; /* log2 of sb_rextents */ + uint8_t sb_inprogress; /* mkfs is in progress, don't mount */ + uint8_t sb_imax_pct; /* max % of fs for inode space */ + /* statistics */ + /* + * These fields must remain contiguous. If you really + * want to change their layout, make sure you fix the + * code in xfs_trans_apply_sb_deltas(). + */ + uint64_t sb_icount; /* allocated inodes */ + uint64_t sb_ifree; /* free inodes */ + uint64_t sb_fdblocks; /* free data blocks */ + uint64_t sb_frextents; /* free realtime extents */ + /* + * End contiguous fields. + */ + xfs_ino_t sb_uquotino; /* user quota inode */ + xfs_ino_t sb_gquotino; /* group quota inode */ + uint16_t sb_qflags; /* quota flags */ + uint8_t sb_flags; /* misc. flags */ + uint8_t sb_shared_vn; /* shared version number */ + xfs_extlen_t sb_inoalignmt; /* inode chunk alignment, fsblocks */ + uint32_t sb_unit; /* stripe or raid unit */ + uint32_t sb_width; /* stripe or raid width */ + uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */ + uint8_t sb_logsectlog; /* log2 of the log sector size */ + uint16_t sb_logsectsize; /* sector size for the log, bytes */ + uint32_t sb_logsunit; /* stripe unit size for the log */ + uint32_t sb_features2; /* additional feature bits */ + + /* + * bad features2 field as a result of failing to pad the sb + * structure to 64 bits. Some machines will be using this field + * for features2 bits. Easiest just to mark it bad and not use + * it for anything else. + */ + uint32_t sb_bad_features2; + + /* must be padded to 64 bit alignment */ +} xfs_sb_t; + +/* + * Sequence number values for the fields. + */ +typedef enum { + XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS, + XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO, + XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS, + XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS, + XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE, + XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG, + XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG, + XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT, + XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO, + XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN, + XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG, + XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT, + XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2, + XFS_SBS_FIELDCOUNT +} xfs_sb_field_t; + +/* + * Mask values, defined based on the xfs_sb_field_t values. + * Only define the ones we're using. + */ +#define XFS_SB_MVAL(x) (1LL << XFS_SBS_ ## x) +#define XFS_SB_UUID XFS_SB_MVAL(UUID) +#define XFS_SB_FNAME XFS_SB_MVAL(FNAME) +#define XFS_SB_ROOTINO XFS_SB_MVAL(ROOTINO) +#define XFS_SB_RBMINO XFS_SB_MVAL(RBMINO) +#define XFS_SB_RSUMINO XFS_SB_MVAL(RSUMINO) +#define XFS_SB_VERSIONNUM XFS_SB_MVAL(VERSIONNUM) +#define XFS_SB_UQUOTINO XFS_SB_MVAL(UQUOTINO) +#define XFS_SB_GQUOTINO XFS_SB_MVAL(GQUOTINO) +#define XFS_SB_QFLAGS XFS_SB_MVAL(QFLAGS) +#define XFS_SB_SHARED_VN XFS_SB_MVAL(SHARED_VN) +#define XFS_SB_UNIT XFS_SB_MVAL(UNIT) +#define XFS_SB_WIDTH XFS_SB_MVAL(WIDTH) +#define XFS_SB_ICOUNT XFS_SB_MVAL(ICOUNT) +#define XFS_SB_IFREE XFS_SB_MVAL(IFREE) +#define XFS_SB_FDBLOCKS XFS_SB_MVAL(FDBLOCKS) +#define XFS_SB_FEATURES2 XFS_SB_MVAL(FEATURES2) +#define XFS_SB_BAD_FEATURES2 XFS_SB_MVAL(BAD_FEATURES2) +#define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT) +#define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1) +#define XFS_SB_MOD_BITS \ + (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \ + XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \ + XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \ + XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \ + XFS_SB_BAD_FEATURES2) + + +/* + * Misc. Flags - warning - these will be cleared by xfs_repair unless + * a feature bit is set when the flag is used. + */ +#define XFS_SBF_NOFLAGS 0x00 /* no flags set */ +#define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */ + +/* + * define max. shared version we can interoperate with + */ +#define XFS_SB_MAX_SHARED_VN 0 + +#define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS) + +static inline int xfs_sb_good_version(xfs_sb_t *sbp) +{ + /* We always support version 1-3 */ + if (sbp->sb_versionnum >= XFS_SB_VERSION_1 && + sbp->sb_versionnum <= XFS_SB_VERSION_3) + return 1; + + /* We support version 4 if all feature bits are supported */ + if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) { + if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) || + ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) && + (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS))) + return 0; + + if ((sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT) && + sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN) + return 0; + + return 1; + } + + return 0; +} + +/* + * Detect a mismatched features2 field. Older kernels read/wrote + * this into the wrong slot, so to be safe we keep them in sync. + */ +static inline int xfs_sb_has_mismatched_features2(xfs_sb_t *sbp) +{ + return (sbp->sb_bad_features2 != sbp->sb_features2); +} + +static inline unsigned xfs_sb_version_tonew(unsigned v) +{ + if (v == XFS_SB_VERSION_1) + return XFS_SB_VERSION_4; + + if (v == XFS_SB_VERSION_2) + return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT; + + return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT | + XFS_SB_VERSION_NLINKBIT; +} + +static inline unsigned xfs_sb_version_toold(unsigned v) +{ + if (v & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT)) + return 0; + if (v & XFS_SB_VERSION_NLINKBIT) + return XFS_SB_VERSION_3; + if (v & XFS_SB_VERSION_ATTRBIT) + return XFS_SB_VERSION_2; + return XFS_SB_VERSION_1; +} + +static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp) +{ + return sbp->sb_versionnum == XFS_SB_VERSION_2 || + sbp->sb_versionnum == XFS_SB_VERSION_3 || + (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && + (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT)); +} + +static inline void xfs_sb_version_addattr(xfs_sb_t *sbp) +{ + if (sbp->sb_versionnum == XFS_SB_VERSION_1) + sbp->sb_versionnum = XFS_SB_VERSION_2; + else if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) + sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT; + else + sbp->sb_versionnum = XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT; +} + +static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp) +{ + return sbp->sb_versionnum == XFS_SB_VERSION_3 || + (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && + (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT)); +} + +static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp) +{ + if (sbp->sb_versionnum <= XFS_SB_VERSION_2) + sbp->sb_versionnum = XFS_SB_VERSION_3; + else + sbp->sb_versionnum |= XFS_SB_VERSION_NLINKBIT; +} + +static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp) +{ + return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && + (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT); +} + +static inline void xfs_sb_version_addquota(xfs_sb_t *sbp) +{ + if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) + sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT; + else + sbp->sb_versionnum = xfs_sb_version_tonew(sbp->sb_versionnum) | + XFS_SB_VERSION_QUOTABIT; +} + +static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp) +{ + return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && + (sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT); +} + +static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp) +{ + return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && + (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT); +} + +static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp) +{ + return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && + (sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT); +} + +static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp) +{ + return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && + (sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT); +} + +static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp) +{ + return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && + (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT); +} + +static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp) +{ + return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && + (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT); +} + +static inline int xfs_sb_version_hassector(xfs_sb_t *sbp) +{ + return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && + (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT); +} + +static inline int xfs_sb_version_hasasciici(xfs_sb_t *sbp) +{ + return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && + (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT); +} + +static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp) +{ + return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 && + (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT); +} + +/* + * sb_features2 bit version macros. + * + * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro: + * + * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp) + * ((xfs_sb_version_hasmorebits(sbp) && + * ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT) + */ + +static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp) +{ + return xfs_sb_version_hasmorebits(sbp) && + (sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT); +} + +static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp) +{ + return xfs_sb_version_hasmorebits(sbp) && + (sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT); +} + +static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp) +{ + sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT; + sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT; +} + +static inline void xfs_sb_version_removeattr2(xfs_sb_t *sbp) +{ + sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT; + if (!sbp->sb_features2) + sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT; +} + +static inline int xfs_sb_version_hasprojid32bit(xfs_sb_t *sbp) +{ + return xfs_sb_version_hasmorebits(sbp) && + (sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT); +} + +/* + * end of superblock version macros + */ + +#define XFS_SB_DADDR ((xfs_daddr_t)0) /* daddr in filesystem/ag */ +#define XFS_SB_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_SB_DADDR) +#define XFS_BUF_TO_SBP(bp) ((xfs_dsb_t *)((bp)->b_addr)) + +#define XFS_HDR_BLOCK(mp,d) ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d)) +#define XFS_DADDR_TO_FSB(mp,d) XFS_AGB_TO_FSB(mp, \ + xfs_daddr_to_agno(mp,d), xfs_daddr_to_agbno(mp,d)) +#define XFS_FSB_TO_DADDR(mp,fsbno) XFS_AGB_TO_DADDR(mp, \ + XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno)) + +/* + * File system sector to basic block conversions. + */ +#define XFS_FSS_TO_BB(mp,sec) ((sec) << (mp)->m_sectbb_log) + +/* + * File system block to basic block conversions. + */ +#define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log) +#define XFS_BB_TO_FSB(mp,bb) \ + (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log) +#define XFS_BB_TO_FSBT(mp,bb) ((bb) >> (mp)->m_blkbb_log) + +/* + * File system block to byte conversions. + */ +#define XFS_FSB_TO_B(mp,fsbno) ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog) +#define XFS_B_TO_FSB(mp,b) \ + ((((uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog) +#define XFS_B_TO_FSBT(mp,b) (((uint64_t)(b)) >> (mp)->m_sb.sb_blocklog) +#define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask) + +#endif /* XFS_SB_H_ */ diff --git a/extlinux/xfs_types.h b/extlinux/xfs_types.h new file mode 100644 index 00000000..92808865 --- /dev/null +++ b/extlinux/xfs_types.h @@ -0,0 +1,135 @@ +/* + * Taken from Linux kernel tree (linux/fs/xfs) + * + * Copyright (c) 2000-2005 Silicon Graphics, Inc. + * All Rights Reserved. + * + * Copyright (c) 2012 Paulo Alcantara <pcacjr@zytor.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ +#ifndef XFS_TYPES_H_ +#define XFS_TYPES_H_ + +#include <stddef.h> + +#include <sys/types.h> + +typedef enum { B_FALSE,B_TRUE } boolean_t; +typedef uint32_t prid_t; /* project ID */ +typedef uint32_t inst_t; /* an instruction */ + +typedef int64_t xfs_off_t; /* <file offset> type */ +typedef unsigned long long xfs_ino_t; /* <inode> type */ +typedef int64_t xfs_daddr_t; /* <disk address> type */ +typedef char * xfs_caddr_t; /* <core address> type */ +typedef uint32_t xfs_dev_t; +typedef uint32_t xfs_nlink_t; + +/* __psint_t is the same size as a pointer */ +typedef int32_t __psint_t; +typedef uint32_t __psunsigned_t; + +typedef uint32_t xfs_agblock_t; /* blockno in alloc. group */ +typedef uint32_t xfs_extlen_t; /* extent length in blocks */ +typedef uint32_t xfs_agnumber_t; /* allocation group number */ +typedef int32_t xfs_extnum_t; /* # of extents in a file */ +typedef int16_t xfs_aextnum_t; /* # extents in an attribute fork */ +typedef int64_t xfs_fsize_t; /* bytes in a file */ +typedef uint64_t xfs_ufsize_t; /* unsigned bytes in a file */ + +typedef int32_t xfs_suminfo_t; /* type of bitmap summary info */ +typedef int32_t xfs_rtword_t; /* word type for bitmap manipulations */ + +typedef int64_t xfs_lsn_t; /* log sequence number */ +typedef int32_t xfs_tid_t; /* transaction identifier */ + +typedef uint32_t xfs_dablk_t; /* dir/attr block number (in file) */ +typedef uint32_t xfs_dahash_t; /* dir/attr hash value */ + +/* + * These types are 64 bits on disk but are either 32 or 64 bits in memory. + * Disk based types: + */ +typedef uint64_t xfs_dfsbno_t; /* blockno in filesystem (agno|agbno) */ +typedef uint64_t xfs_drfsbno_t; /* blockno in filesystem (raw) */ +typedef uint64_t xfs_drtbno_t; /* extent (block) in realtime area */ +typedef uint64_t xfs_dfiloff_t; /* block number in a file */ +typedef uint64_t xfs_dfilblks_t; /* number of blocks in a file */ + +/* + * Memory based types are conditional. + */ +typedef uint64_t xfs_fsblock_t; /* blockno in filesystem (agno|agbno) */ +typedef uint64_t xfs_rfsblock_t; /* blockno in filesystem (raw) */ +typedef uint64_t xfs_rtblock_t; /* extent (block) in realtime area */ +typedef int64_t xfs_srtblock_t; /* signed version of xfs_rtblock_t */ + +typedef uint64_t xfs_fileoff_t; /* block number in a file */ +typedef int64_t xfs_sfiloff_t; /* signed block number in a file */ +typedef uint64_t xfs_filblks_t; /* number of blocks in a file */ + +/* + * Null values for the types. + */ +#define NULLDFSBNO ((xfs_dfsbno_t)-1) +#define NULLDRFSBNO ((xfs_drfsbno_t)-1) +#define NULLDRTBNO ((xfs_drtbno_t)-1) +#define NULLDFILOFF ((xfs_dfiloff_t)-1) + +#define NULLFSBLOCK ((xfs_fsblock_t)-1) +#define NULLRFSBLOCK ((xfs_rfsblock_t)-1) +#define NULLRTBLOCK ((xfs_rtblock_t)-1) +#define NULLFILEOFF ((xfs_fileoff_t)-1) + +#define NULLAGBLOCK ((xfs_agblock_t)-1) +#define NULLAGNUMBER ((xfs_agnumber_t)-1) +#define NULLEXTNUM ((xfs_extnum_t)-1) + +#define NULLCOMMITLSN ((xfs_lsn_t)-1) + +/* + * Max values for extlen, extnum, aextnum. + */ +#define MAXEXTLEN ((xfs_extlen_t)0x001fffff) /* 21 bits */ +#define MAXEXTNUM ((xfs_extnum_t)0x7fffffff) /* signed int */ +#define MAXAEXTNUM ((xfs_aextnum_t)0x7fff) /* signed short */ + +/* + * Min numbers of data/attr fork btree root pointers. + */ +#define MINDBTPTRS 3 +#define MINABTPTRS 2 + +/* + * MAXNAMELEN is the length (including the terminating null) of + * the longest permissible file (component) name. + */ +#define MAXNAMELEN 256 + +typedef enum { + XFS_LOOKUP_EQi, XFS_LOOKUP_LEi, XFS_LOOKUP_GEi +} xfs_lookup_t; + +typedef enum { + XFS_BTNUM_BNOi, XFS_BTNUM_CNTi, XFS_BTNUM_BMAPi, XFS_BTNUM_INOi, + XFS_BTNUM_MAX +} xfs_btnum_t; + +struct xfs_name { + const unsigned char *name; + int len; +}; + +#endif /* XFS_TYPES_H_ */ |