diff options
Diffstat (limited to 'fs/xfs/linux-2.6/xfs_linux.h')
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_linux.h | 374 |
1 files changed, 374 insertions, 0 deletions
diff --git a/fs/xfs/linux-2.6/xfs_linux.h b/fs/xfs/linux-2.6/xfs_linux.h new file mode 100644 index 00000000000..71bb41019a1 --- /dev/null +++ b/fs/xfs/linux-2.6/xfs_linux.h @@ -0,0 +1,374 @@ +/* + * Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2 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. + * + * Further, this software is distributed without any warranty that it is + * free of the rightful claim of any third person regarding infringement + * or the like. Any license provided herein, whether implied or + * otherwise, applies only to this software file. Patent licenses, if + * any, provided herein do not apply to combinations of this program with + * other software, or any other product whatsoever. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write the Free Software Foundation, Inc., 59 + * Temple Place - Suite 330, Boston MA 02111-1307, USA. + * + * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, + * Mountain View, CA 94043, or: + * + * http://www.sgi.com + * + * For further information regarding this notice, see: + * + * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ + */ +#ifndef __XFS_LINUX__ +#define __XFS_LINUX__ + +#include <linux/types.h> +#include <linux/config.h> + +/* + * Some types are conditional depending on the target system. + * XFS_BIG_BLKNOS needs block layer disk addresses to be 64 bits. + * XFS_BIG_INUMS needs the VFS inode number to be 64 bits, as well + * as requiring XFS_BIG_BLKNOS to be set. + */ +#if defined(CONFIG_LBD) || (BITS_PER_LONG == 64) +# define XFS_BIG_BLKNOS 1 +# if BITS_PER_LONG == 64 +# define XFS_BIG_INUMS 1 +# else +# define XFS_BIG_INUMS 0 +# endif +#else +# define XFS_BIG_BLKNOS 0 +# define XFS_BIG_INUMS 0 +#endif + +#include <xfs_types.h> +#include <xfs_arch.h> + +#include <kmem.h> +#include <mrlock.h> +#include <spin.h> +#include <sv.h> +#include <mutex.h> +#include <sema.h> +#include <time.h> + +#include <support/qsort.h> +#include <support/ktrace.h> +#include <support/debug.h> +#include <support/move.h> +#include <support/uuid.h> + +#include <linux/mm.h> +#include <linux/kernel.h> +#include <linux/blkdev.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/file.h> +#include <linux/swap.h> +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/bitops.h> +#include <linux/major.h> +#include <linux/pagemap.h> +#include <linux/vfs.h> +#include <linux/seq_file.h> +#include <linux/init.h> +#include <linux/list.h> +#include <linux/proc_fs.h> +#include <linux/version.h> +#include <linux/sort.h> + +#include <asm/page.h> +#include <asm/div64.h> +#include <asm/param.h> +#include <asm/uaccess.h> +#include <asm/byteorder.h> +#include <asm/unaligned.h> + +#include <xfs_behavior.h> +#include <xfs_vfs.h> +#include <xfs_cred.h> +#include <xfs_vnode.h> +#include <xfs_stats.h> +#include <xfs_sysctl.h> +#include <xfs_iops.h> +#include <xfs_super.h> +#include <xfs_globals.h> +#include <xfs_fs_subr.h> +#include <xfs_lrw.h> +#include <xfs_buf.h> + +/* + * Feature macros (disable/enable) + */ +#undef HAVE_REFCACHE /* reference cache not needed for NFS in 2.6 */ +#define HAVE_SENDFILE /* sendfile(2) exists in 2.6, but not in 2.4 */ + +/* + * State flag for unwritten extent buffers. + * + * We need to be able to distinguish between these and delayed + * allocate buffers within XFS. The generic IO path code does + * not need to distinguish - we use the BH_Delay flag for both + * delalloc and these ondisk-uninitialised buffers. + */ +BUFFER_FNS(PrivateStart, unwritten); +static inline void set_buffer_unwritten_io(struct buffer_head *bh) +{ + bh->b_end_io = linvfs_unwritten_done; +} + +#define restricted_chown xfs_params.restrict_chown.val +#define irix_sgid_inherit xfs_params.sgid_inherit.val +#define irix_symlink_mode xfs_params.symlink_mode.val +#define xfs_panic_mask xfs_params.panic_mask.val +#define xfs_error_level xfs_params.error_level.val +#define xfs_syncd_centisecs xfs_params.syncd_timer.val +#define xfs_stats_clear xfs_params.stats_clear.val +#define xfs_inherit_sync xfs_params.inherit_sync.val +#define xfs_inherit_nodump xfs_params.inherit_nodump.val +#define xfs_inherit_noatime xfs_params.inherit_noatim.val +#define xfs_buf_timer_centisecs xfs_params.xfs_buf_timer.val +#define xfs_buf_age_centisecs xfs_params.xfs_buf_age.val +#define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val +#define xfs_rotorstep xfs_params.rotorstep.val + +#ifndef __smp_processor_id +#define __smp_processor_id() smp_processor_id() +#endif +#define current_cpu() __smp_processor_id() +#define current_pid() (current->pid) +#define current_fsuid(cred) (current->fsuid) +#define current_fsgid(cred) (current->fsgid) + +#define NBPP PAGE_SIZE +#define DPPSHFT (PAGE_SHIFT - 9) +#define NDPP (1 << (PAGE_SHIFT - 9)) +#define dtop(DD) (((DD) + NDPP - 1) >> DPPSHFT) +#define dtopt(DD) ((DD) >> DPPSHFT) +#define dpoff(DD) ((DD) & (NDPP-1)) + +#define NBBY 8 /* number of bits per byte */ +#define NBPC PAGE_SIZE /* Number of bytes per click */ +#define BPCSHIFT PAGE_SHIFT /* LOG2(NBPC) if exact */ + +/* + * Size of block device i/o is parameterized here. + * Currently the system supports page-sized i/o. + */ +#define BLKDEV_IOSHIFT BPCSHIFT +#define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT) +/* number of BB's per block device block */ +#define BLKDEV_BB BTOBB(BLKDEV_IOSIZE) + +/* bytes to clicks */ +#define btoc(x) (((__psunsigned_t)(x)+(NBPC-1))>>BPCSHIFT) +#define btoct(x) ((__psunsigned_t)(x)>>BPCSHIFT) +#define btoc64(x) (((__uint64_t)(x)+(NBPC-1))>>BPCSHIFT) +#define btoct64(x) ((__uint64_t)(x)>>BPCSHIFT) +#define io_btoc(x) (((__psunsigned_t)(x)+(IO_NBPC-1))>>IO_BPCSHIFT) +#define io_btoct(x) ((__psunsigned_t)(x)>>IO_BPCSHIFT) + +/* off_t bytes to clicks */ +#define offtoc(x) (((__uint64_t)(x)+(NBPC-1))>>BPCSHIFT) +#define offtoct(x) ((xfs_off_t)(x)>>BPCSHIFT) + +/* clicks to off_t bytes */ +#define ctooff(x) ((xfs_off_t)(x)<<BPCSHIFT) + +/* clicks to bytes */ +#define ctob(x) ((__psunsigned_t)(x)<<BPCSHIFT) +#define btoct(x) ((__psunsigned_t)(x)>>BPCSHIFT) +#define ctob64(x) ((__uint64_t)(x)<<BPCSHIFT) +#define io_ctob(x) ((__psunsigned_t)(x)<<IO_BPCSHIFT) + +/* bytes to clicks */ +#define btoc(x) (((__psunsigned_t)(x)+(NBPC-1))>>BPCSHIFT) + +#ifndef CELL_CAPABLE +#define FSC_NOTIFY_NAME_CHANGED(vp) +#endif + +#ifndef ENOATTR +#define ENOATTR ENODATA /* Attribute not found */ +#endif + +/* Note: EWRONGFS never visible outside the kernel */ +#define EWRONGFS EINVAL /* Mount with wrong filesystem type */ + +/* + * XXX EFSCORRUPTED needs a real value in errno.h. asm-i386/errno.h won't + * return codes out of its known range in errno. + * XXX Also note: needs to be < 1000 and fairly unique on Linux (mustn't + * conflict with any code we use already or any code a driver may use) + * XXX Some options (currently we do #2): + * 1/ New error code ["Filesystem is corrupted", _after_ glibc updated] + * 2/ 990 ["Unknown error 990"] + * 3/ EUCLEAN ["Structure needs cleaning"] + * 4/ Convert EFSCORRUPTED to EIO [just prior to return into userspace] + */ +#define EFSCORRUPTED 990 /* Filesystem is corrupted */ + +#define SYNCHRONIZE() barrier() +#define __return_address __builtin_return_address(0) + +/* + * IRIX (BSD) quotactl makes use of separate commands for user/group, + * whereas on Linux the syscall encodes this information into the cmd + * field (see the QCMD macro in quota.h). These macros help keep the + * code portable - they are not visible from the syscall interface. + */ +#define Q_XSETGQLIM XQM_CMD(0x8) /* set groups disk limits */ +#define Q_XGETGQUOTA XQM_CMD(0x9) /* get groups disk limits */ + +/* IRIX uses a dynamic sizing algorithm (ndquot = 200 + numprocs*2) */ +/* we may well need to fine-tune this if it ever becomes an issue. */ +#define DQUOT_MAX_HEURISTIC 1024 /* NR_DQUOTS */ +#define ndquot DQUOT_MAX_HEURISTIC + +/* IRIX uses the current size of the name cache to guess a good value */ +/* - this isn't the same but is a good enough starting point for now. */ +#define DQUOT_HASH_HEURISTIC files_stat.nr_files + +/* IRIX inodes maintain the project ID also, zero this field on Linux */ +#define DEFAULT_PROJID 0 +#define dfltprid DEFAULT_PROJID + +#define MAXPATHLEN 1024 + +#define MIN(a,b) (min(a,b)) +#define MAX(a,b) (max(a,b)) +#define howmany(x, y) (((x)+((y)-1))/(y)) +#define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) + +#define xfs_stack_trace() dump_stack() + +#define xfs_itruncate_data(ip, off) \ + (-vmtruncate(LINVFS_GET_IP(XFS_ITOV(ip)), (off))) + + +/* Move the kernel do_div definition off to one side */ + +#if defined __i386__ +/* For ia32 we need to pull some tricks to get past various versions + * of the compiler which do not like us using do_div in the middle + * of large functions. + */ +static inline __u32 xfs_do_div(void *a, __u32 b, int n) +{ + __u32 mod; + + switch (n) { + case 4: + mod = *(__u32 *)a % b; + *(__u32 *)a = *(__u32 *)a / b; + return mod; + case 8: + { + unsigned long __upper, __low, __high, __mod; + __u64 c = *(__u64 *)a; + __upper = __high = c >> 32; + __low = c; + if (__high) { + __upper = __high % (b); + __high = __high / (b); + } + asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); + asm("":"=A" (c):"a" (__low),"d" (__high)); + *(__u64 *)a = c; + return __mod; + } + } + + /* NOTREACHED */ + return 0; +} + +/* Side effect free 64 bit mod operation */ +static inline __u32 xfs_do_mod(void *a, __u32 b, int n) +{ + switch (n) { + case 4: + return *(__u32 *)a % b; + case 8: + { + unsigned long __upper, __low, __high, __mod; + __u64 c = *(__u64 *)a; + __upper = __high = c >> 32; + __low = c; + if (__high) { + __upper = __high % (b); + __high = __high / (b); + } + asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); + asm("":"=A" (c):"a" (__low),"d" (__high)); + return __mod; + } + } + + /* NOTREACHED */ + return 0; +} +#else +static inline __u32 xfs_do_div(void *a, __u32 b, int n) +{ + __u32 mod; + + switch (n) { + case 4: + mod = *(__u32 *)a % b; + *(__u32 *)a = *(__u32 *)a / b; + return mod; + case 8: + mod = do_div(*(__u64 *)a, b); + return mod; + } + + /* NOTREACHED */ + return 0; +} + +/* Side effect free 64 bit mod operation */ +static inline __u32 xfs_do_mod(void *a, __u32 b, int n) +{ + switch (n) { + case 4: + return *(__u32 *)a % b; + case 8: + { + __u64 c = *(__u64 *)a; + return do_div(c, b); + } + } + + /* NOTREACHED */ + return 0; +} +#endif + +#undef do_div +#define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a)) +#define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a)) + +static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y) +{ + x += y - 1; + do_div(x, y); + return(x * y); +} + +#define qsort(a, n, s, cmp) sort(a, n, s, cmp, NULL) + +#endif /* __XFS_LINUX__ */ |