| /* |
| * 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 raw_smp_processor_id |
| #define raw_smp_processor_id() smp_processor_id() |
| #endif |
| #define current_cpu() raw_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__ */ |