diff options
Diffstat (limited to 'sys/gnu/fs/xfs/xfs_vfsops.c')
| -rw-r--r-- | sys/gnu/fs/xfs/xfs_vfsops.c | 2030 |
1 files changed, 0 insertions, 2030 deletions
diff --git a/sys/gnu/fs/xfs/xfs_vfsops.c b/sys/gnu/fs/xfs/xfs_vfsops.c deleted file mode 100644 index b073a8e..0000000 --- a/sys/gnu/fs/xfs/xfs_vfsops.c +++ /dev/null @@ -1,2030 +0,0 @@ -/* - * Copyright (c) 2000-2005 Silicon Graphics, Inc. - * All Rights Reserved. - * - * 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 - */ -#include "xfs.h" -#include "xfs_fs.h" -#include "xfs_types.h" -#include "xfs_bit.h" -#include "xfs_log.h" -#include "xfs_inum.h" -#include "xfs_trans.h" -#include "xfs_sb.h" -#include "xfs_ag.h" -#include "xfs_dir.h" -#include "xfs_dir2.h" -#include "xfs_dmapi.h" -#include "xfs_mount.h" -#include "xfs_da_btree.h" -#include "xfs_bmap_btree.h" -#include "xfs_ialloc_btree.h" -#include "xfs_alloc_btree.h" -#include "xfs_dir_sf.h" -#include "xfs_dir2_sf.h" -#include "xfs_attr_sf.h" -#include "xfs_dinode.h" -#include "xfs_inode.h" -#include "xfs_inode_item.h" -#include "xfs_btree.h" -#include "xfs_alloc.h" -#include "xfs_ialloc.h" -#include "xfs_quota.h" -#include "xfs_error.h" -#include "xfs_bmap.h" -#include "xfs_rw.h" -#include "xfs_refcache.h" -#include "xfs_buf_item.h" -#include "xfs_log_priv.h" -#include "xfs_dir2_trace.h" -#include "xfs_extfree_item.h" -#include "xfs_acl.h" -#include "xfs_attr.h" -#include "xfs_clnt.h" -#include "xfs_fsops.h" -#include "xfs_vnode.h" - -STATIC int xfs_sync(bhv_desc_t *, int, cred_t *); - - extern kmem_zone_t *xfs_bmap_free_item_zone; - extern kmem_zone_t *xfs_btree_cur_zone; - extern kmem_zone_t *xfs_trans_zone; - extern kmem_zone_t *xfs_dabuf_zone; - extern kmem_zone_t *xfs_buf_item_zone; - -#ifdef XFS_DABUF_DEBUG - extern lock_t xfs_dabuf_global_lock; -#endif - -int -xfs_init(void) -{ -#if 0 - extern kmem_zone_t *xfs_bmap_free_item_zone; - extern kmem_zone_t *xfs_btree_cur_zone; - extern kmem_zone_t *xfs_trans_zone; - extern kmem_zone_t *xfs_buf_item_zone; - extern kmem_zone_t *xfs_dabuf_zone; -#endif -#ifdef XFS_DABUF_DEBUG - spinlock_init(&xfs_dabuf_global_lock, "xfsda"); -#endif - /* - * Initialize all of the zone allocators we use. - */ - xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t), - "xfs_bmap_free_item"); - xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t), - "xfs_btree_cur"); - xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans"); - xfs_da_state_zone = - kmem_zone_init(sizeof(xfs_da_state_t), "xfs_da_state"); - xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf"); - xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork"); - xfs_acl_zone_init(xfs_acl_zone, "xfs_acl"); - - /* - * The size of the zone allocated buf log item is the maximum - * size possible under XFS. This wastes a little bit of memory, - * but it is much faster. - */ - xfs_buf_item_zone = - kmem_zone_init((sizeof(xfs_buf_log_item_t) + - (((XFS_MAX_BLOCKSIZE / XFS_BLI_CHUNK) / - NBWORD) * sizeof(int))), - "xfs_buf_item"); - xfs_efd_zone = - kmem_zone_init((sizeof(xfs_efd_log_item_t) + - ((XFS_EFD_MAX_FAST_EXTENTS - 1) * - sizeof(xfs_extent_t))), - "xfs_efd_item"); - xfs_efi_zone = - kmem_zone_init((sizeof(xfs_efi_log_item_t) + - ((XFS_EFI_MAX_FAST_EXTENTS - 1) * - sizeof(xfs_extent_t))), - "xfs_efi_item"); - - /* - * These zones warrant special memory allocator hints - */ - xfs_inode_zone = - kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode", - KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | - KM_ZONE_SPREAD, NULL); - xfs_ili_zone = - kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili", - KM_ZONE_SPREAD, NULL); - xfs_chashlist_zone = - kmem_zone_init_flags(sizeof(xfs_chashlist_t), "xfs_chashlist", - KM_ZONE_SPREAD, NULL); - - /* - * Allocate global trace buffers. - */ -#ifdef XFS_ALLOC_TRACE - xfs_alloc_trace_buf = ktrace_alloc(XFS_ALLOC_TRACE_SIZE, KM_SLEEP); -#endif -#ifdef XFS_BMAP_TRACE - xfs_bmap_trace_buf = ktrace_alloc(XFS_BMAP_TRACE_SIZE, KM_SLEEP); -#endif -#ifdef XFS_BMBT_TRACE - xfs_bmbt_trace_buf = ktrace_alloc(XFS_BMBT_TRACE_SIZE, KM_SLEEP); -#endif -#ifdef XFS_DIR_TRACE - xfs_dir_trace_buf = ktrace_alloc(XFS_DIR_TRACE_SIZE, KM_SLEEP); -#endif -#ifdef XFS_ATTR_TRACE - xfs_attr_trace_buf = ktrace_alloc(XFS_ATTR_TRACE_SIZE, KM_SLEEP); -#endif -#ifdef XFS_DIR2_TRACE - xfs_dir2_trace_buf = ktrace_alloc(XFS_DIR2_GTRACE_SIZE, KM_SLEEP); -#endif - - xfs_dir_startup(); - -#if (defined(DEBUG) || defined(INDUCE_IO_ERROR)) - xfs_error_test_init(); -#endif /* DEBUG || INDUCE_IO_ERROR */ - - xfs_refcache_init(); - xfs_init_procfs(); - xfs_sysctl_register(); - return 0; -} - -void -xfs_cleanup(void) -{ -#if 0 - extern kmem_zone_t *xfs_bmap_free_item_zone; - extern kmem_zone_t *xfs_btree_cur_zone; - extern kmem_zone_t *xfs_inode_zone; - extern kmem_zone_t *xfs_trans_zone; - extern kmem_zone_t *xfs_da_state_zone; - extern kmem_zone_t *xfs_dabuf_zone; - extern kmem_zone_t *xfs_efd_zone; - extern kmem_zone_t *xfs_efi_zone; - extern kmem_zone_t *xfs_buf_item_zone; - extern kmem_zone_t *xfs_chashlist_zone; -#endif - - xfs_cleanup_procfs(); - xfs_sysctl_unregister(); - xfs_refcache_destroy(); - xfs_acl_zone_destroy(xfs_acl_zone); - -#ifdef XFS_DIR2_TRACE - ktrace_free(xfs_dir2_trace_buf); -#endif -#ifdef XFS_ATTR_TRACE - ktrace_free(xfs_attr_trace_buf); -#endif -#ifdef XFS_DIR_TRACE - ktrace_free(xfs_dir_trace_buf); -#endif -#ifdef XFS_BMBT_TRACE - ktrace_free(xfs_bmbt_trace_buf); -#endif -#ifdef XFS_BMAP_TRACE - ktrace_free(xfs_bmap_trace_buf); -#endif -#ifdef XFS_ALLOC_TRACE - ktrace_free(xfs_alloc_trace_buf); -#endif - - kmem_zone_destroy(xfs_bmap_free_item_zone); - kmem_zone_destroy(xfs_btree_cur_zone); - kmem_zone_destroy(xfs_inode_zone); - kmem_zone_destroy(xfs_trans_zone); - kmem_zone_destroy(xfs_da_state_zone); - kmem_zone_destroy(xfs_dabuf_zone); - kmem_zone_destroy(xfs_buf_item_zone); - kmem_zone_destroy(xfs_efd_zone); - kmem_zone_destroy(xfs_efi_zone); - kmem_zone_destroy(xfs_ifork_zone); - kmem_zone_destroy(xfs_ili_zone); - kmem_zone_destroy(xfs_chashlist_zone); -} - -/* - * xfs_start_flags - * - * This function fills in xfs_mount_t fields based on mount args. - * Note: the superblock has _not_ yet been read in. - */ -STATIC int -xfs_start_flags( - struct xfs_vfs *vfs, - struct xfs_mount_args *ap, - struct xfs_mount *mp) -{ - /* Values are in BBs */ - if ((ap->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) { - /* - * At this point the superblock has not been read - * in, therefore we do not know the block size. - * Before the mount call ends we will convert - * these to FSBs. - */ - mp->m_dalign = ap->sunit; - mp->m_swidth = ap->swidth; - } - - if (ap->logbufs != -1 && - ap->logbufs != 0 && - (ap->logbufs < XLOG_MIN_ICLOGS || - ap->logbufs > XLOG_MAX_ICLOGS)) { - cmn_err(CE_WARN, - "XFS: invalid logbufs value: %d [not %d-%d]", - ap->logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS); - return XFS_ERROR(EINVAL); - } - mp->m_logbufs = ap->logbufs; - if (ap->logbufsize != -1 && - ap->logbufsize != 0 && - ap->logbufsize != 16 * 1024 && - ap->logbufsize != 32 * 1024 && - ap->logbufsize != 64 * 1024 && - ap->logbufsize != 128 * 1024 && - ap->logbufsize != 256 * 1024) { - cmn_err(CE_WARN, - "XFS: invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]", - ap->logbufsize); - return XFS_ERROR(EINVAL); - } - mp->m_ihsize = ap->ihashsize; - mp->m_logbsize = ap->logbufsize; - mp->m_fsname_len = strlen(ap->fsname) + 1; - mp->m_fsname = kmem_alloc(mp->m_fsname_len, KM_SLEEP); - strcpy(mp->m_fsname, ap->fsname); - if (ap->rtname[0]) { - mp->m_rtname = kmem_alloc(strlen(ap->rtname) + 1, KM_SLEEP); - strcpy(mp->m_rtname, ap->rtname); - } - if (ap->logname[0]) { - mp->m_logname = kmem_alloc(strlen(ap->logname) + 1, KM_SLEEP); - strcpy(mp->m_logname, ap->logname); - } - - if (ap->flags & XFSMNT_WSYNC) - mp->m_flags |= XFS_MOUNT_WSYNC; -#if XFS_BIG_INUMS - if (ap->flags & XFSMNT_INO64) { - mp->m_flags |= XFS_MOUNT_INO64; - mp->m_inoadd = XFS_INO64_OFFSET; - } -#endif - if (ap->flags & XFSMNT_RETERR) - mp->m_flags |= XFS_MOUNT_RETERR; - if (ap->flags & XFSMNT_NOALIGN) - mp->m_flags |= XFS_MOUNT_NOALIGN; - if (ap->flags & XFSMNT_SWALLOC) - mp->m_flags |= XFS_MOUNT_SWALLOC; - if (ap->flags & XFSMNT_OSYNCISOSYNC) - mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC; - if (ap->flags & XFSMNT_32BITINODES) - mp->m_flags |= XFS_MOUNT_32BITINODES; - - if (ap->flags & XFSMNT_IOSIZE) { - if (ap->iosizelog > XFS_MAX_IO_LOG || - ap->iosizelog < XFS_MIN_IO_LOG) { - cmn_err(CE_WARN, - "XFS: invalid log iosize: %d [not %d-%d]", - ap->iosizelog, XFS_MIN_IO_LOG, - XFS_MAX_IO_LOG); - return XFS_ERROR(EINVAL); - } - - mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE; - mp->m_readio_log = mp->m_writeio_log = ap->iosizelog; - } - - if (ap->flags & XFSMNT_IHASHSIZE) - mp->m_flags |= XFS_MOUNT_IHASHSIZE; - if (ap->flags & XFSMNT_IDELETE) - mp->m_flags |= XFS_MOUNT_IDELETE; - if (ap->flags & XFSMNT_DIRSYNC) - mp->m_flags |= XFS_MOUNT_DIRSYNC; - if (ap->flags & XFSMNT_ATTR2) - mp->m_flags |= XFS_MOUNT_ATTR2; - - if (ap->flags2 & XFSMNT2_COMPAT_IOSIZE) - mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE; - - /* - * no recovery flag requires a read-only mount - */ - if (ap->flags & XFSMNT_NORECOVERY) { - if (!(vfs->vfs_flag & VFS_RDONLY)) { - cmn_err(CE_WARN, - "XFS: tried to mount a FS read-write without recovery!"); - return XFS_ERROR(EINVAL); - } - mp->m_flags |= XFS_MOUNT_NORECOVERY; - } - - if (ap->flags & XFSMNT_NOUUID) - mp->m_flags |= XFS_MOUNT_NOUUID; - if (ap->flags & XFSMNT_BARRIER) - mp->m_flags |= XFS_MOUNT_BARRIER; - else - mp->m_flags &= ~XFS_MOUNT_BARRIER; - - return 0; -} - -/* - * This function fills in xfs_mount_t fields based on mount args. - * Note: the superblock _has_ now been read in. - */ -STATIC int -xfs_finish_flags( - struct xfs_vfs *vfs, - struct xfs_mount_args *ap, - struct xfs_mount *mp) -{ - int ronly = (vfs->vfs_flag & VFS_RDONLY); - - /* Fail a mount where the logbuf is smaller then the log stripe */ - if (XFS_SB_VERSION_HASLOGV2(&mp->m_sb)) { - if ((ap->logbufsize <= 0) && - (mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE)) { - mp->m_logbsize = mp->m_sb.sb_logsunit; - } else if (ap->logbufsize > 0 && - ap->logbufsize < mp->m_sb.sb_logsunit) { - cmn_err(CE_WARN, - "XFS: logbuf size must be greater than or equal to log stripe size"); - return XFS_ERROR(EINVAL); - } - } else { - /* Fail a mount if the logbuf is larger than 32K */ - if (ap->logbufsize > XLOG_BIG_RECORD_BSIZE) { - cmn_err(CE_WARN, - "XFS: logbuf size for version 1 logs must be 16K or 32K"); - return XFS_ERROR(EINVAL); - } - } - - if (XFS_SB_VERSION_HASATTR2(&mp->m_sb)) { - mp->m_flags |= XFS_MOUNT_ATTR2; - } - - /* - * prohibit r/w mounts of read-only filesystems - */ - if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) { - cmn_err(CE_WARN, - "XFS: cannot mount a read-only filesystem as read-write"); - return XFS_ERROR(EROFS); - } - - /* - * check for shared mount. - */ - if (ap->flags & XFSMNT_SHARED) { - if (!XFS_SB_VERSION_HASSHARED(&mp->m_sb)) - return XFS_ERROR(EINVAL); - - /* - * For IRIX 6.5, shared mounts must have the shared - * version bit set, have the persistent readonly - * field set, must be version 0 and can only be mounted - * read-only. - */ - if (!ronly || !(mp->m_sb.sb_flags & XFS_SBF_READONLY) || - (mp->m_sb.sb_shared_vn != 0)) - return XFS_ERROR(EINVAL); - - mp->m_flags |= XFS_MOUNT_SHARED; - - /* - * Shared XFS V0 can't deal with DMI. Return EINVAL. - */ - if (mp->m_sb.sb_shared_vn == 0 && (ap->flags & XFSMNT_DMAPI)) - return XFS_ERROR(EINVAL); - } - - return 0; -} - -/* - * xfs_mount - * - * The file system configurations are: - * (1) device (partition) with data and internal log - * (2) logical volume with data and log subvolumes. - * (3) logical volume with data, log, and realtime subvolumes. - * - * We only have to handle opening the log and realtime volumes here if - * they are present. The data subvolume has already been opened by - * get_sb_bdev() and is stored in vfsp->vfs_super->s_bdev. - */ -STATIC int -xfs_mount( - struct bhv_desc *bhvp, - struct xfs_mount_args *args, - cred_t *credp) -{ - struct xfs_vfs *vfsp = bhvtovfs(bhvp); - struct bhv_desc *p; - struct xfs_mount *mp = XFS_BHVTOM(bhvp); - struct vnode *ddev, *logdev, *rtdev; - int flags = 0, error; - - ddev = logdev = rtdev = NULL; - - error = xfs_blkdev_get(mp, args->fsname, &ddev); - if (error) - return error; - - /* - * Setup xfs_mount function vectors from available behaviors - */ - p = vfs_bhv_lookup(vfsp, VFS_POSITION_DM); - mp->m_dm_ops = p ? *(xfs_dmops_t *) vfs_bhv_custom(p) : xfs_dmcore_stub; - p = vfs_bhv_lookup(vfsp, VFS_POSITION_QM); - mp->m_qm_ops = p ? *(xfs_qmops_t *) vfs_bhv_custom(p) : xfs_qmcore_stub; - p = vfs_bhv_lookup(vfsp, VFS_POSITION_IO); - mp->m_io_ops = p ? *(xfs_ioops_t *) vfs_bhv_custom(p) : xfs_iocore_xfs; - - if (args->flags & XFSMNT_QUIET) - flags |= XFS_MFSI_QUIET; - - /* - * Open real time and log devices - order is important. - */ - if (args->logname[0]) { - error = xfs_blkdev_get(mp, args->logname, &logdev); - if (error) { - xfs_blkdev_put(ddev); - return error; - } - } - if (args->rtname[0]) { - error = xfs_blkdev_get(mp, args->rtname, &rtdev); - if (error) { - xfs_blkdev_put(logdev); - xfs_blkdev_put(ddev); - return error; - } - - if (rtdev == ddev || rtdev == logdev) { - cmn_err(CE_WARN, - "XFS: Cannot mount filesystem with identical rtdev and ddev/logdev."); - xfs_blkdev_put(logdev); - xfs_blkdev_put(rtdev); - xfs_blkdev_put(ddev); - return EINVAL; - } - } - - /* - * Setup xfs_mount buffer target pointers - */ - error = ENOMEM; - mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0); - if (!mp->m_ddev_targp) { - xfs_blkdev_put(logdev); - xfs_blkdev_put(rtdev); - return error; - } - if (rtdev) { - mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1); - if (!mp->m_rtdev_targp) - goto error0; - } - mp->m_logdev_targp = (logdev && logdev != ddev) ? - xfs_alloc_buftarg(logdev, 1) : mp->m_ddev_targp; - if (!mp->m_logdev_targp) - goto error0; - - /* - * Setup flags based on mount(2) options and then the superblock - */ - error = xfs_start_flags(vfsp, args, mp); - if (error) - goto error1; - error = xfs_readsb(mp, flags); - if (error) - goto error1; - error = xfs_finish_flags(vfsp, args, mp); - if (error) - goto error2; - - /* - * Setup xfs_mount buffer target pointers based on superblock - */ - error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize, - mp->m_sb.sb_sectsize); - if (!error && logdev && logdev != ddev) { - unsigned int log_sector_size = BBSIZE; - - if (XFS_SB_VERSION_HASSECTOR(&mp->m_sb)) - log_sector_size = mp->m_sb.sb_logsectsize; - error = xfs_setsize_buftarg(mp->m_logdev_targp, - mp->m_sb.sb_blocksize, - log_sector_size); - } - if (!error && rtdev) - error = xfs_setsize_buftarg(mp->m_rtdev_targp, - mp->m_sb.sb_blocksize, - mp->m_sb.sb_sectsize); - if (error) - goto error2; - - if ((mp->m_flags & XFS_MOUNT_BARRIER) && !(vfsp->vfs_flag & VFS_RDONLY)) - xfs_mountfs_check_barriers(mp); - - error = XFS_IOINIT(vfsp, args, flags); - if (error) - goto error2; - - return 0; - -error2: - if (mp->m_sb_bp) - xfs_freesb(mp); -error1: - xfs_binval(mp->m_ddev_targp); - if (logdev && logdev != ddev) - xfs_binval(mp->m_logdev_targp); - if (rtdev) - xfs_binval(mp->m_rtdev_targp); -error0: - xfs_unmountfs_close(mp, credp); - return error; -} - -STATIC int -xfs_unmount( - bhv_desc_t *bdp, - int flags, - cred_t *credp) -{ - struct xfs_vfs *vfsp = bhvtovfs(bdp); - xfs_mount_t *mp = XFS_BHVTOM(bdp); - xfs_inode_t *rip; - xfs_vnode_t *rvp; - int unmount_event_wanted = 0; - int unmount_event_flags = 0; - int xfs_unmountfs_needed = 0; - int error; - - rip = mp->m_rootip; - rvp = XFS_ITOV(rip); - - if (vfsp->vfs_flag & VFS_DMI) { - error = XFS_SEND_PREUNMOUNT(mp, vfsp, - rvp, DM_RIGHT_NULL, rvp, DM_RIGHT_NULL, - NULL, NULL, 0, 0, - (mp->m_dmevmask & (1<<DM_EVENT_PREUNMOUNT))? - 0:DM_FLAGS_UNWANTED); - if (error) - return XFS_ERROR(error); - unmount_event_wanted = 1; - unmount_event_flags = (mp->m_dmevmask & (1<<DM_EVENT_UNMOUNT))? - 0 : DM_FLAGS_UNWANTED; - } - - /* - * Linux (& presumably Irix) do not reach this code if - * any of this FS vnodes have active references. FreeBSD - * relies on FS to clean after itself. - */ - xfs_iflush_all(mp); - - /* - * First blow any referenced inode from this file system - * out of the reference cache, and delete the timer. - */ - xfs_refcache_purge_mp(mp); - - XFS_bflush(mp->m_ddev_targp); - error = xfs_unmount_flush(mp, 0); - if (error) - goto out; - - ASSERT(vn_count(rvp) == 1); - - /* - * Drop the reference count - */ - VN_RELE(rvp); - - /* - * If we're forcing a shutdown, typically because of a media error, - * we want to make sure we invalidate dirty pages that belong to - * referenced vnodes as well. - */ - if (XFS_FORCED_SHUTDOWN(mp)) { - error = xfs_sync(&mp->m_bhv, - (SYNC_WAIT | SYNC_CLOSE), credp); - ASSERT(error != EFSCORRUPTED); - } - xfs_unmountfs_needed = 1; - -out: - /* Send DMAPI event, if required. - * Then do xfs_unmountfs() if needed. - * Then return error (or zero). - */ - if (unmount_event_wanted) { - /* Note: mp structure must still exist for - * XFS_SEND_UNMOUNT() call. - */ - XFS_SEND_UNMOUNT(mp, vfsp, error == 0 ? rvp : NULL, - DM_RIGHT_NULL, 0, error, unmount_event_flags); - } - if (xfs_unmountfs_needed) { - /* - * Call common unmount function to flush to disk - * and free the super block buffer & mount structures. - */ - xfs_unmountfs(mp, credp); - } - - return XFS_ERROR(error); -} - -STATIC int -xfs_quiesce_fs( - xfs_mount_t *mp) -{ - int count = 0, pincount; - - xfs_refcache_purge_mp(mp); - xfs_flush_buftarg(mp->m_ddev_targp, 0); - xfs_finish_reclaim_all(mp, 0); - - /* This loop must run at least twice. - * The first instance of the loop will flush - * most meta data but that will generate more - * meta data (typically directory updates). - * Which then must be flushed and logged before - * we can write the unmount record. - */ - do { - xfs_syncsub(mp, SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT, 0, NULL); - pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1); - if (!pincount) { - delay(50); - count++; - } - } while (count < 2); - - return 0; -} - -/* XXXKAN */ -#define pagebuf_delwri_flush(a,b,c) \ - do { \ - printf("pagebuf_delwri_flush NI\n"); \ - if (c) *((int *)(c)) = 0; \ - } while(0) - -STATIC int -xfs_mntupdate( - bhv_desc_t *bdp, - int *flags, - struct xfs_mount_args *args) -{ - struct xfs_vfs *vfsp = bhvtovfs(bdp); - xfs_mount_t *mp = XFS_BHVTOM(bdp); - int error; - -#ifdef RMC - if (!(*flags & MS_RDONLY)) { /* rw/ro -> rw */ -#endif - if (!(*flags & VFS_RDONLY)) { /* rw/ro -> rw */ - if (vfsp->vfs_flag & VFS_RDONLY) - vfsp->vfs_flag &= ~VFS_RDONLY; - if (args->flags & XFSMNT_BARRIER) { - mp->m_flags |= XFS_MOUNT_BARRIER; - xfs_mountfs_check_barriers(mp); - } else { - mp->m_flags &= ~XFS_MOUNT_BARRIER; - } - } else if (!(vfsp->vfs_flag & VFS_RDONLY)) { /* rw -> ro */ - XVFS_SYNC(vfsp, SYNC_FSDATA|SYNC_BDFLUSH|SYNC_ATTR, NULL, error); - xfs_quiesce_fs(mp); - xfs_log_unmount_write(mp); - xfs_unmountfs_writesb(mp); - vfsp->vfs_flag |= VFS_RDONLY; - } - return 0; -} - -/* - * xfs_unmount_flush implements a set of flush operation on special - * inodes, which are needed as a separate set of operations so that - * they can be called as part of relocation process. - */ -int -xfs_unmount_flush( - xfs_mount_t *mp, /* Mount structure we are getting - rid of. */ - int relocation) /* Called from vfs relocation. */ -{ - xfs_inode_t *rip = mp->m_rootip; - xfs_inode_t *rbmip; - xfs_inode_t *rsumip = NULL; - xfs_vnode_t *rvp = XFS_ITOV_NULL(rip); - int error; - - if (rvp == NULL) - return (0); - xfs_ilock(rip, XFS_ILOCK_EXCL); - xfs_iflock(rip); - - /* - * Flush out the real time inodes. - */ - if ((rbmip = mp->m_rbmip) != NULL) { - xfs_ilock(rbmip, XFS_ILOCK_EXCL); - xfs_iflock(rbmip); - error = xfs_iflush(rbmip, XFS_IFLUSH_SYNC); - xfs_iunlock(rbmip, XFS_ILOCK_EXCL); - - if (error == EFSCORRUPTED) - goto fscorrupt_out; - - ASSERT(vn_count(XFS_ITOV(rbmip)) == 1); - - rsumip = mp->m_rsumip; - xfs_ilock(rsumip, XFS_ILOCK_EXCL); - xfs_iflock(rsumip); - error = xfs_iflush(rsumip, XFS_IFLUSH_SYNC); - xfs_iunlock(rsumip, XFS_ILOCK_EXCL); - - if (error == EFSCORRUPTED) - goto fscorrupt_out; - - ASSERT(vn_count(XFS_ITOV(rsumip)) == 1); - } - - /* - * Synchronously flush root inode to disk - */ - error = xfs_iflush(rip, XFS_IFLUSH_SYNC); - if (error == EFSCORRUPTED) - goto fscorrupt_out2; - - if (vn_count(rvp) != 1 && !relocation) { - xfs_iunlock(rip, XFS_ILOCK_EXCL); - return XFS_ERROR(EBUSY); - } - - /* - * Release dquot that rootinode, rbmino and rsumino might be holding, - * flush and purge the quota inodes. - */ - error = XFS_QM_UNMOUNT(mp); - if (error == EFSCORRUPTED) - goto fscorrupt_out2; - - if (rbmip) { - VN_RELE(XFS_ITOV(rbmip)); - VN_RELE(XFS_ITOV(rsumip)); - } - - xfs_iunlock(rip, XFS_ILOCK_EXCL); - return 0; - -fscorrupt_out: - xfs_ifunlock(rip); - -fscorrupt_out2: - xfs_iunlock(rip, XFS_ILOCK_EXCL); - - return XFS_ERROR(EFSCORRUPTED); -} - -/* - * xfs_root extracts the root vnode from a vfs. - * - * vfsp -- the vfs struct for the desired file system - * vpp -- address of the caller's vnode pointer which should be - * set to the desired fs root vnode - */ -STATIC int -xfs_root( - bhv_desc_t *bdp, - xfs_vnode_t **vpp) -{ - xfs_vnode_t *vp; - - vp = XFS_ITOV((XFS_BHVTOM(bdp))->m_rootip); - VN_HOLD(vp); - *vpp = vp; - return 0; -} - -/* - * xfs_statvfs - * - * Fill in the statvfs structure for the given file system. We use - * the superblock lock in the mount structure to ensure a consistent - * snapshot of the counters returned. - */ -STATIC int -xfs_statvfs( - bhv_desc_t *bdp, - xfs_statfs_t *statp, - xfs_vnode_t *vp) -{ - __uint64_t fakeinos; - xfs_extlen_t lsize; - xfs_mount_t *mp; - xfs_sb_t *sbp; - unsigned long s; - - mp = XFS_BHVTOM(bdp); - sbp = &(mp->m_sb); - - statp->f_type = XFS_SB_MAGIC; - - xfs_icsb_sync_counters_lazy(mp); - s = XFS_SB_LOCK(mp); - statp->f_bsize = sbp->sb_blocksize; - lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0; - statp->f_blocks = sbp->sb_dblocks - lsize; - statp->f_bfree = statp->f_bavail = sbp->sb_fdblocks; - fakeinos = statp->f_bfree << sbp->sb_inopblog; -#if XFS_BIG_INUMS - fakeinos += mp->m_inoadd; -#endif - statp->f_files = - MIN(sbp->sb_icount + fakeinos, (__uint64_t)XFS_MAXINUMBER); - if (mp->m_maxicount) -#if XFS_BIG_INUMS - if (!mp->m_inoadd) -#endif - statp->f_files = min_t(typeof(statp->f_files), - statp->f_files, - mp->m_maxicount); - statp->f_ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree); - XFS_SB_UNLOCK(mp, s); - - xfs_statvfs_fsid(statp, mp); - return 0; -} - - -/* - * xfs_sync flushes any pending I/O to file system vfsp. - * - * This routine is called by vfs_sync() to make sure that things make it - * out to disk eventually, on sync() system calls to flush out everything, - * and when the file system is unmounted. For the vfs_sync() case, all - * we really need to do is sync out the log to make all of our meta-data - * updates permanent (except for timestamps). For calls from pflushd(), - * dirty pages are kept moving by calling pdflush() on the inodes - * containing them. We also flush the inodes that we can lock without - * sleeping and the superblock if we can lock it without sleeping from - * vfs_sync() so that items at the tail of the log are always moving out. - * - * Flags: - * SYNC_BDFLUSH - We're being called from vfs_sync() so we don't want - * to sleep if we can help it. All we really need - * to do is ensure that the log is synced at least - * periodically. We also push the inodes and - * superblock if we can lock them without sleeping - * and they are not pinned. - * SYNC_ATTR - We need to flush the inodes. If SYNC_BDFLUSH is not - * set, then we really want to lock each inode and flush - * it. - * SYNC_WAIT - All the flushes that take place in this call should - * be synchronous. - * SYNC_DELWRI - This tells us to push dirty pages associated with - * inodes. SYNC_WAIT and SYNC_BDFLUSH are used to - * determine if they should be flushed sync, async, or - * delwri. - * SYNC_CLOSE - This flag is passed when the system is being - * unmounted. We should sync and invalidate everything. - * SYNC_FSDATA - This indicates that the caller would like to make - * sure the superblock is safe on disk. We can ensure - * this by simply making sure the log gets flushed - * if SYNC_BDFLUSH is set, and by actually writing it - * out otherwise. - * - */ -/*ARGSUSED*/ -STATIC int -xfs_sync( - bhv_desc_t *bdp, - int flags, - cred_t *credp) -{ - xfs_mount_t *mp = XFS_BHVTOM(bdp); - - if (unlikely(flags == SYNC_QUIESCE)) - return xfs_quiesce_fs(mp); - else - return xfs_syncsub(mp, flags, 0, NULL); -} - -/* - * xfs sync routine for internal use - * - * This routine supports all of the flags defined for the generic VFS_SYNC - * interface as explained above under xfs_sync. In the interests of not - * changing interfaces within the 6.5 family, additional internally- - * required functions are specified within a separate xflags parameter, - * only available by calling this routine. - * - */ -int -xfs_sync_inodes( - xfs_mount_t *mp, - int flags, - int xflags, - int *bypassed) -{ - xfs_inode_t *ip = NULL; - xfs_inode_t *ip_next; - xfs_buf_t *bp; - xfs_vnode_t *vp = NULL; - int error; - int last_error; - uint64_t fflag; - uint lock_flags; - uint base_lock_flags; - boolean_t mount_locked; - boolean_t vnode_refed; - int preempt; - xfs_dinode_t *dip; - xfs_iptr_t *ipointer; -#ifdef DEBUG - boolean_t ipointer_in = B_FALSE; - -#define IPOINTER_SET ipointer_in = B_TRUE -#define IPOINTER_CLR ipointer_in = B_FALSE -#else -#define IPOINTER_SET -#define IPOINTER_CLR -#endif - - -/* Insert a marker record into the inode list after inode ip. The list - * must be locked when this is called. After the call the list will no - * longer be locked. - */ -#define IPOINTER_INSERT(ip, mp) { \ - ASSERT(ipointer_in == B_FALSE); \ - ipointer->ip_mnext = ip->i_mnext; \ - ipointer->ip_mprev = ip; \ - ip->i_mnext = (xfs_inode_t *)ipointer; \ - ipointer->ip_mnext->i_mprev = (xfs_inode_t *)ipointer; \ - preempt = 0; \ - XFS_MOUNT_IUNLOCK(mp); \ - mount_locked = B_FALSE; \ - IPOINTER_SET; \ - } - -/* Remove the marker from the inode list. If the marker was the only item - * in the list then there are no remaining inodes and we should zero out - * the whole list. If we are the current head of the list then move the head - * past us. - */ -#define IPOINTER_REMOVE(ip, mp) { \ - ASSERT(ipointer_in == B_TRUE); \ - if (ipointer->ip_mnext != (xfs_inode_t *)ipointer) { \ - ip = ipointer->ip_mnext; \ - ip->i_mprev = ipointer->ip_mprev; \ - ipointer->ip_mprev->i_mnext = ip; \ - if (mp->m_inodes == (xfs_inode_t *)ipointer) { \ - mp->m_inodes = ip; \ - } \ - } else { \ - ASSERT(mp->m_inodes == (xfs_inode_t *)ipointer); \ - mp->m_inodes = NULL; \ - ip = NULL; \ - } \ - IPOINTER_CLR; \ - } - -#define XFS_PREEMPT_MASK 0x7f - - if (bypassed) - *bypassed = 0; - if (XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY) - return 0; - error = 0; - last_error = 0; - preempt = 0; - - /* Allocate a reference marker */ - ipointer = (xfs_iptr_t *)kmem_zalloc(sizeof(xfs_iptr_t), KM_SLEEP); - - fflag = XFS_B_ASYNC; /* default is don't wait */ - if (flags & (SYNC_BDFLUSH | SYNC_DELWRI)) - fflag = XFS_B_DELWRI; - if (flags & SYNC_WAIT) - fflag = 0; /* synchronous overrides all */ - - base_lock_flags = XFS_ILOCK_SHARED; - if (flags & (SYNC_DELWRI | SYNC_CLOSE)) { - /* - * We need the I/O lock if we're going to call any of - * the flush/inval routines. - */ - base_lock_flags |= XFS_IOLOCK_SHARED; - } - - XFS_MOUNT_ILOCK(mp); - - ip = mp->m_inodes; - - mount_locked = B_TRUE; - vnode_refed = B_FALSE; - - IPOINTER_CLR; - - do { - ASSERT(ipointer_in == B_FALSE); - ASSERT(vnode_refed == B_FALSE); - - lock_flags = base_lock_flags; - - /* - * There were no inodes in the list, just break out - * of the loop. - */ - if (ip == NULL) { - break; - } - - /* - * We found another sync thread marker - skip it - */ - if (ip->i_mount == NULL) { - ip = ip->i_mnext; - continue; - } - - vp = XFS_ITOV_NULL(ip); - - /* - * If the vnode is gone then this is being torn down, - * call reclaim if it is flushed, else let regular flush - * code deal with it later in the loop. - */ - - if (vp == NULL) { - /* Skip ones already in reclaim */ - if (ip->i_flags & XFS_IRECLAIM) { - ip = ip->i_mnext; - continue; - } - if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) { - ip = ip->i_mnext; - } else if ((xfs_ipincount(ip) == 0) && - xfs_iflock_nowait(ip)) { - IPOINTER_INSERT(ip, mp); - - xfs_finish_reclaim(ip, 1, - XFS_IFLUSH_DELWRI_ELSE_ASYNC); - - XFS_MOUNT_ILOCK(mp); - mount_locked = B_TRUE; - IPOINTER_REMOVE(ip, mp); - } else { - xfs_iunlock(ip, XFS_ILOCK_EXCL); - ip = ip->i_mnext; - } - continue; - } - - if (VN_BAD(vp)) { - ip = ip->i_mnext; - continue; - } - - if (XFS_FORCED_SHUTDOWN(mp) && !(flags & SYNC_CLOSE)) { - XFS_MOUNT_IUNLOCK(mp); - kmem_free(ipointer, sizeof(xfs_iptr_t)); - return 0; - } - - /* - * If this is just vfs_sync() or pflushd() calling - * then we can skip inodes for which it looks like - * there is nothing to do. Since we don't have the - * inode locked this is racy, but these are periodic - * calls so it doesn't matter. For the others we want - * to know for sure, so we at least try to lock them. - */ - if (flags & SYNC_BDFLUSH) { - if (((ip->i_itemp == NULL) || - !(ip->i_itemp->ili_format.ilf_fields & - XFS_ILOG_ALL)) && - (ip->i_update_core == 0)) { - ip = ip->i_mnext; - continue; - } - } - - /* - * Try to lock without sleeping. We're out of order with - * the inode list lock here, so if we fail we need to drop - * the mount lock and try again. If we're called from - * bdflush() here, then don't bother. - * - * The inode lock here actually coordinates with the - * almost spurious inode lock in xfs_ireclaim() to prevent - * the vnode we handle here without a reference from - * being freed while we reference it. If we lock the inode - * while it's on the mount list here, then the spurious inode - * lock in xfs_ireclaim() after the inode is pulled from - * the mount list will sleep until we release it here. - * This keeps the vnode from being freed while we reference - * it. - */ - if (xfs_ilock_nowait(ip, lock_flags) == 0) { - if ((flags & SYNC_BDFLUSH) || (vp == NULL)) { - ip = ip->i_mnext; - continue; - } - - vp = vn_grab(vp); - if (vp == NULL) { - ip = ip->i_mnext; - continue; - } - - IPOINTER_INSERT(ip, mp); - xfs_ilock(ip, lock_flags); - - ASSERT(vp == XFS_ITOV(ip)); - ASSERT(ip->i_mount == mp); - - vnode_refed = B_TRUE; - } - - /* From here on in the loop we may have a marker record - * in the inode list. - */ - - if ((flags & SYNC_CLOSE) && (vp != NULL)) { - /* - * This is the shutdown case. We just need to - * flush and invalidate all the pages associated - * with the inode. Drop the inode lock since - * we can't hold it across calls to the buffer - * cache. - * - * We don't set the VREMAPPING bit in the vnode - * here, because we don't hold the vnode lock - * exclusively. It doesn't really matter, though, - * because we only come here when we're shutting - * down anyway. - */ - xfs_iunlock(ip, XFS_ILOCK_SHARED); - - if (XFS_FORCED_SHUTDOWN(mp)) { - XVOP_TOSS_PAGES(vp, 0, -1, FI_REMAPF); - } else { - XVOP_FLUSHINVAL_PAGES(vp, 0, -1, FI_REMAPF); - } - - xfs_ilock(ip, XFS_ILOCK_SHARED); - - } else if ((flags & SYNC_DELWRI) && (vp != NULL)) { - if (VN_DIRTY(vp)) { - /* We need to have dropped the lock here, - * so insert a marker if we have not already - * done so. - */ - if (mount_locked) { - IPOINTER_INSERT(ip, mp); - } - - /* - * Drop the inode lock since we can't hold it - * across calls to the buffer cache. - */ - xfs_iunlock(ip, XFS_ILOCK_SHARED); - XVOP_FLUSH_PAGES(vp, (xfs_off_t)0, -1, - fflag, FI_NONE, error); - xfs_ilock(ip, XFS_ILOCK_SHARED); - } - - } - - if (flags & SYNC_BDFLUSH) { - if ((flags & SYNC_ATTR) && - ((ip->i_update_core) || - ((ip->i_itemp != NULL) && - (ip->i_itemp->ili_format.ilf_fields != 0)))) { - - /* Insert marker and drop lock if not already - * done. - */ - if (mount_locked) { - IPOINTER_INSERT(ip, mp); - } - - /* - * We don't want the periodic flushing of the - * inodes by vfs_sync() to interfere with - * I/O to the file, especially read I/O - * where it is only the access time stamp - * that is being flushed out. To prevent - * long periods where we have both inode - * locks held shared here while reading the - * inode's buffer in from disk, we drop the - * inode lock while reading in the inode - * buffer. We have to release the buffer - * and reacquire the inode lock so that they - * are acquired in the proper order (inode - * locks first). The buffer will go at the - * end of the lru chain, though, so we can - * expect it to still be there when we go - * for it again in xfs_iflush(). - */ - if ((xfs_ipincount(ip) == 0) && - xfs_iflock_nowait(ip)) { - - xfs_ifunlock(ip); - xfs_iunlock(ip, XFS_ILOCK_SHARED); - - error = xfs_itobp(mp, NULL, ip, - &dip, &bp, 0, 0); - if (!error) { - xfs_buf_relse(bp); - } else { - /* Bailing out, remove the - * marker and free it. - */ - XFS_MOUNT_ILOCK(mp); - - IPOINTER_REMOVE(ip, mp); - - XFS_MOUNT_IUNLOCK(mp); - - ASSERT(!(lock_flags & - XFS_IOLOCK_SHARED)); - - kmem_free(ipointer, - sizeof(xfs_iptr_t)); - return (0); - } - - /* - * Since we dropped the inode lock, - * the inode may have been reclaimed. - * Therefore, we reacquire the mount - * lock and check to see if we were the - * inode reclaimed. If this happened - * then the ipointer marker will no - * longer point back at us. In this - * case, move ip along to the inode - * after the marker, remove the marker - * and continue. - */ - XFS_MOUNT_ILOCK(mp); - mount_locked = B_TRUE; - - if (ip != ipointer->ip_mprev) { - IPOINTER_REMOVE(ip, mp); - - ASSERT(!vnode_refed); - ASSERT(!(lock_flags & - XFS_IOLOCK_SHARED)); - continue; - } - - ASSERT(ip->i_mount == mp); - - if (xfs_ilock_nowait(ip, - XFS_ILOCK_SHARED) == 0) { - ASSERT(ip->i_mount == mp); - /* - * We failed to reacquire - * the inode lock without - * sleeping, so just skip - * the inode for now. We - * clear the ILOCK bit from - * the lock_flags so that we - * won't try to drop a lock - * we don't hold below. - */ - lock_flags &= ~XFS_ILOCK_SHARED; - IPOINTER_REMOVE(ip_next, mp); - } else if ((xfs_ipincount(ip) == 0) && - xfs_iflock_nowait(ip)) { - ASSERT(ip->i_mount == mp); - /* - * Since this is vfs_sync() - * calling we only flush the - * inode out if we can lock - * it without sleeping and - * it is not pinned. Drop - * the mount lock here so - * that we don't hold it for - * too long. We already have - * a marker in the list here. - */ - XFS_MOUNT_IUNLOCK(mp); - mount_locked = B_FALSE; - error = xfs_iflush(ip, - XFS_IFLUSH_DELWRI); - } else { - ASSERT(ip->i_mount == mp); - IPOINTER_REMOVE(ip_next, mp); - } - } - - } - - } else { - if ((flags & SYNC_ATTR) && - ((ip->i_update_core) || - ((ip->i_itemp != NULL) && - (ip->i_itemp->ili_format.ilf_fields != 0)))) { - if (mount_locked) { - IPOINTER_INSERT(ip, mp); - } - - if (flags & SYNC_WAIT) { - xfs_iflock(ip); - error = xfs_iflush(ip, - XFS_IFLUSH_SYNC); - } else { - /* - * If we can't acquire the flush - * lock, then the inode is already - * being flushed so don't bother - * waiting. If we can lock it then - * do a delwri flush so we can - * combine multiple inode flushes - * in each disk write. - */ - if (xfs_iflock_nowait(ip)) { - error = xfs_iflush(ip, - XFS_IFLUSH_DELWRI); - } - else if (bypassed) - (*bypassed)++; - } - } - } - - if (lock_flags != 0) { - xfs_iunlock(ip, lock_flags); - } - - if (vnode_refed) { - /* - * If we had to take a reference on the vnode - * above, then wait until after we've unlocked - * the inode to release the reference. This is - * because we can be already holding the inode - * lock when VN_RELE() calls xfs_inactive(). - * - * Make sure to drop the mount lock before calling - * VN_RELE() so that we don't trip over ourselves if - * we have to go for the mount lock again in the - * inactive code. - */ - if (mount_locked) { - IPOINTER_INSERT(ip, mp); - } - - VN_RELE(vp); - - vnode_refed = B_FALSE; - } - - if (error) { - last_error = error; - } - - /* - * bail out if the filesystem is corrupted. - */ - if (error == EFSCORRUPTED) { - if (!mount_locked) { - XFS_MOUNT_ILOCK(mp); - IPOINTER_REMOVE(ip, mp); - } - XFS_MOUNT_IUNLOCK(mp); - ASSERT(ipointer_in == B_FALSE); - kmem_free(ipointer, sizeof(xfs_iptr_t)); - return XFS_ERROR(error); - } - - /* Let other threads have a chance at the mount lock - * if we have looped many times without dropping the - * lock. - */ - if ((++preempt & XFS_PREEMPT_MASK) == 0) { - if (mount_locked) { - IPOINTER_INSERT(ip, mp); - } - } - - if (mount_locked == B_FALSE) { - XFS_MOUNT_ILOCK(mp); - mount_locked = B_TRUE; - IPOINTER_REMOVE(ip, mp); - continue; - } - - ASSERT(ipointer_in == B_FALSE); - ip = ip->i_mnext; - - } while (ip != mp->m_inodes); - - XFS_MOUNT_IUNLOCK(mp); - - ASSERT(ipointer_in == B_FALSE); - - kmem_free(ipointer, sizeof(xfs_iptr_t)); - return XFS_ERROR(last_error); -} - -/* - * xfs sync routine for internal use - * - * This routine supports all of the flags defined for the generic VFS_SYNC - * interface as explained above under xfs_sync. In the interests of not - * changing interfaces within the 6.5 family, additional internally- - * required functions are specified within a separate xflags parameter, - * only available by calling this routine. - * - */ -int -xfs_syncsub( - xfs_mount_t *mp, - int flags, - int xflags, - int *bypassed) -{ - int error = 0; - int last_error = 0; - uint log_flags = XFS_LOG_FORCE; - xfs_buf_t *bp; - xfs_buf_log_item_t *bip; - - /* - * Sync out the log. This ensures that the log is periodically - * flushed even if there is not enough activity to fill it up. - */ - if (flags & SYNC_WAIT) - log_flags |= XFS_LOG_SYNC; - - xfs_log_force(mp, (xfs_lsn_t)0, log_flags); - - if (flags & (SYNC_ATTR|SYNC_DELWRI)) { - if (flags & SYNC_BDFLUSH) - xfs_finish_reclaim_all(mp, 1); - else - error = xfs_sync_inodes(mp, flags, xflags, bypassed); - } - - /* - * Flushing out dirty data above probably generated more - * log activity, so if this isn't vfs_sync() then flush - * the log again. - */ - if (flags & SYNC_DELWRI) { - xfs_log_force(mp, (xfs_lsn_t)0, log_flags); - } - - if (flags & SYNC_FSDATA) { - /* - * If this is vfs_sync() then only sync the superblock - * if we can lock it without sleeping and it is not pinned. - */ - if (flags & SYNC_BDFLUSH) { - bp = xfs_getsb(mp, XFS_BUF_TRYLOCK); - if (bp != NULL) { - bip = XFS_BUF_FSPRIVATE(bp,xfs_buf_log_item_t*); - if ((bip != NULL) && - xfs_buf_item_dirty(bip)) { - if (!(XFS_BUF_ISPINNED(bp))) { - XFS_BUF_ASYNC(bp); - error = xfs_bwrite(mp, bp); - } else { - xfs_buf_relse(bp); - } - } else { - xfs_buf_relse(bp); - } - } - } else { - bp = xfs_getsb(mp, 0); - /* - * If the buffer is pinned then push on the log so - * we won't get stuck waiting in the write for - * someone, maybe ourselves, to flush the log. - * Even though we just pushed the log above, we - * did not have the superblock buffer locked at - * that point so it can become pinned in between - * there and here. - */ - if (XFS_BUF_ISPINNED(bp)) - xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE); - if (flags & SYNC_WAIT) - XFS_BUF_UNASYNC(bp); - else - XFS_BUF_ASYNC(bp); - error = xfs_bwrite(mp, bp); - } - if (error) { - last_error = error; - } - } - - /* - * If this is the periodic sync, then kick some entries out of - * the reference cache. This ensures that idle entries are - * eventually kicked out of the cache. - */ - if (flags & SYNC_REFCACHE) { - if (flags & SYNC_WAIT) - xfs_refcache_purge_mp(mp); - else - xfs_refcache_purge_some(mp); - } - - /* - * Now check to see if the log needs a "dummy" transaction. - */ - - if (!(flags & SYNC_REMOUNT) && xfs_log_need_covered(mp)) { - xfs_trans_t *tp; - xfs_inode_t *ip; - - /* - * Put a dummy transaction in the log to tell - * recovery that all others are OK. - */ - tp = xfs_trans_alloc(mp, XFS_TRANS_DUMMY1); - if ((error = xfs_trans_reserve(tp, 0, - XFS_ICHANGE_LOG_RES(mp), - 0, 0, 0))) { - xfs_trans_cancel(tp, 0); - return error; - } - - ip = mp->m_rootip; - xfs_ilock(ip, XFS_ILOCK_EXCL); - - xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); - xfs_trans_ihold(tp, ip); - xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); - error = xfs_trans_commit(tp, 0, NULL); - xfs_iunlock(ip, XFS_ILOCK_EXCL); - xfs_log_force(mp, (xfs_lsn_t)0, log_flags); - } - - /* - * When shutting down, we need to insure that the AIL is pushed - * to disk or the filesystem can appear corrupt from the PROM. - */ - if ((flags & (SYNC_CLOSE|SYNC_WAIT)) == (SYNC_CLOSE|SYNC_WAIT)) { - XFS_bflush(mp->m_ddev_targp); - if (mp->m_rtdev_targp) { - XFS_bflush(mp->m_rtdev_targp); - } - } - - return XFS_ERROR(last_error); -} - -/* - * xfs_vget - called by DMAPI and NFSD to get vnode from file handle - */ -STATIC int -xfs_vget( - bhv_desc_t *bdp, - xfs_vnode_t **vpp, - fid_t *fidp) -{ - xfs_mount_t *mp = XFS_BHVTOM(bdp); - xfs_fid_t *xfid = (struct xfs_fid *)fidp; - xfs_inode_t *ip; - int error; - xfs_ino_t ino; - unsigned int igen; - - /* - * Invalid. Since handles can be created in user space and passed in - * via gethandle(), this is not cause for a panic. - */ - if (xfid->xfs_fid_len != sizeof(*xfid) - sizeof(xfid->xfs_fid_len)) - return XFS_ERROR(EINVAL); - - ino = xfid->xfs_fid_ino; - igen = xfid->xfs_fid_gen; - - /* - * NFS can sometimes send requests for ino 0. Fail them gracefully. - */ - if (ino == 0) - return XFS_ERROR(ESTALE); - - error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0); - if (error) { - *vpp = NULL; - return error; - } - - if (ip == NULL) { - *vpp = NULL; - return XFS_ERROR(EIO); - } - - if (ip->i_d.di_mode == 0 || ip->i_d.di_gen != igen) { - xfs_iput_new(ip, XFS_ILOCK_SHARED); - *vpp = NULL; - return XFS_ERROR(ENOENT); - } - - *vpp = XFS_ITOV(ip); - xfs_iunlock(ip, XFS_ILOCK_SHARED); - return 0; -} - - -#define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */ -#define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */ -#define MNTOPT_LOGDEV "logdev" /* log device */ -#define MNTOPT_RTDEV "rtdev" /* realtime I/O device */ -#define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */ -#define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */ -#define MNTOPT_INO64 "ino64" /* force inodes into 64-bit range */ -#define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */ -#define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */ -#define MNTOPT_SUNIT "sunit" /* data volume stripe unit */ -#define MNTOPT_SWIDTH "swidth" /* data volume stripe width */ -#define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */ -#define MNTOPT_MTPT "mtpt" /* filesystem mount point */ -#define MNTOPT_GRPID "grpid" /* group-ID from parent directory */ -#define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */ -#define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */ -#define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */ -#define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */ -#define MNTOPT_IHASHSIZE "ihashsize" /* size of inode hash table */ -#define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */ -#define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and - * unwritten extent conversion */ -#define MNTOPT_NOBARRIER "nobarrier" /* .. disable */ -#define MNTOPT_OSYNCISOSYNC "osyncisosync" /* o_sync is REALLY o_sync */ -#define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */ -#define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */ -#define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */ -#define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */ -#define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes - * in stat(). */ -#define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */ -#define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */ -#define simple_strtoul strtoul - -STATIC unsigned long -suffix_strtoul(char *cp, char **endp, unsigned int base) -{ - int last, shift_left_factor = 0; - char *value = (char *)cp; - - last = strlen(value) - 1; - if (value[last] == 'K' || value[last] == 'k') { - shift_left_factor = 10; - value[last] = '\0'; - } - if (value[last] == 'M' || value[last] == 'm') { - shift_left_factor = 20; - value[last] = '\0'; - } - if (value[last] == 'G' || value[last] == 'g') { - shift_left_factor = 30; - value[last] = '\0'; - } - - return simple_strtoul(cp, endp, base) << shift_left_factor; -} - - -STATIC int -xfs_parseargs( - struct bhv_desc *bhv, - char *options, - struct xfs_mount_args *args, - int update) -{ - struct xfs_vfs *vfsp = bhvtovfs(bhv); - char *this_char, *value, *eov; - int dsunit, dswidth, vol_dsunit, vol_dswidth; - int iosize; - - args->flags |= XFSMNT_IDELETE; - args->flags |= XFSMNT_BARRIER; - args->flags2 |= XFSMNT2_COMPAT_IOSIZE; - - if (!options) - goto done; - - iosize = dsunit = dswidth = vol_dsunit = vol_dswidth = 0; - - while ((this_char = strsep(&options, ",")) != NULL) { - if (!*this_char) - continue; - if ((value = strchr(this_char, '=')) != NULL) - *value++ = 0; - - if (!strcmp(this_char, MNTOPT_LOGBUFS)) { - if (!value || !*value) { - printf("XFS: %s option requires an argument\n", - this_char); - return EINVAL; - } - args->logbufs = simple_strtoul(value, &eov, 10); - } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) { - if (!value || !*value) { - printf("XFS: %s option requires an argument\n", - this_char); - return EINVAL; - } - args->logbufsize = suffix_strtoul(value, &eov, 10); - } else if (!strcmp(this_char, MNTOPT_LOGDEV)) { - if (!value || !*value) { - printf("XFS: %s option requires an argument\n", - this_char); - return EINVAL; - } - strncpy(args->logname, value, MAXNAMELEN); - } else if (!strcmp(this_char, MNTOPT_MTPT)) { - if (!value || !*value) { - printf("XFS: %s option requires an argument\n", - this_char); - return EINVAL; - } - strncpy(args->mtpt, value, MAXNAMELEN); - } else if (!strcmp(this_char, MNTOPT_RTDEV)) { - if (!value || !*value) { - printf("XFS: %s option requires an argument\n", - this_char); - return EINVAL; - } - strncpy(args->rtname, value, MAXNAMELEN); - } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) { - if (!value || !*value) { - printf("XFS: %s option requires an argument\n", - this_char); - return EINVAL; - } - iosize = simple_strtoul(value, &eov, 10); - args->flags |= XFSMNT_IOSIZE; - args->iosizelog = (uint8_t) iosize; - } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) { - if (!value || !*value) { - printk("XFS: %s option requires an argument\n", - this_char); - return EINVAL; - } - iosize = suffix_strtoul(value, &eov, 10); - args->flags |= XFSMNT_IOSIZE; - args->iosizelog = ffs(iosize) - 1; - } else if (!strcmp(this_char, MNTOPT_IHASHSIZE)) { - if (!value || !*value) { - printk("XFS: %s option requires an argument\n", - this_char); - return EINVAL; - } - args->flags |= XFSMNT_IHASHSIZE; - args->ihashsize = simple_strtoul(value, &eov, 10); - } else if (!strcmp(this_char, MNTOPT_GRPID) || - !strcmp(this_char, MNTOPT_BSDGROUPS)) { - vfsp->vfs_flag |= VFS_GRPID; - } else if (!strcmp(this_char, MNTOPT_NOGRPID) || - !strcmp(this_char, MNTOPT_SYSVGROUPS)) { - vfsp->vfs_flag &= ~VFS_GRPID; - } else if (!strcmp(this_char, MNTOPT_WSYNC)) { - args->flags |= XFSMNT_WSYNC; - } else if (!strcmp(this_char, MNTOPT_OSYNCISOSYNC)) { - args->flags |= XFSMNT_OSYNCISOSYNC; - } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) { - args->flags |= XFSMNT_NORECOVERY; - } else if (!strcmp(this_char, MNTOPT_INO64)) { - args->flags |= XFSMNT_INO64; -#if !XFS_BIG_INUMS - - printf("XFS: %s option not allowed on this system\n", - this_char); - return EINVAL; -#endif - } else if (!strcmp(this_char, MNTOPT_NOALIGN)) { - args->flags |= XFSMNT_NOALIGN; - } else if (!strcmp(this_char, MNTOPT_SWALLOC)) { - args->flags |= XFSMNT_SWALLOC; - } else if (!strcmp(this_char, MNTOPT_SUNIT)) { - if (!value || !*value) { - printf("XFS: %s option requires an argument\n", - this_char); - return EINVAL; - } - dsunit = simple_strtoul(value, &eov, 10); - } else if (!strcmp(this_char, MNTOPT_SWIDTH)) { - if (!value || !*value) { - printf("XFS: %s option requires an argument\n", - this_char); - return EINVAL; - } - dswidth = simple_strtoul(value, &eov, 10); - } else if (!strcmp(this_char, MNTOPT_64BITINODE)) { - args->flags &= ~XFSMNT_32BITINODES; -#if !XFS_BIG_INUMS - - printf("XFS: %s option not allowed on this system\n", - this_char); - return EINVAL; -#endif - } else if (!strcmp(this_char, MNTOPT_NOUUID)) { - args->flags |= XFSMNT_NOUUID; - } else if (!strcmp(this_char, MNTOPT_BARRIER)) { - args->flags |= XFSMNT_BARRIER; - } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) { - args->flags &= ~XFSMNT_BARRIER; - } else if (!strcmp(this_char, MNTOPT_IKEEP)) { - args->flags &= ~XFSMNT_IDELETE; - } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) { - args->flags |= XFSMNT_IDELETE; - } else if (!strcmp(this_char, MNTOPT_LARGEIO)) { - args->flags2 &= ~XFSMNT2_COMPAT_IOSIZE; - } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) { - args->flags2 |= XFSMNT2_COMPAT_IOSIZE; - } else if (!strcmp(this_char, MNTOPT_ATTR2)) { - args->flags |= XFSMNT_ATTR2; - } else if (!strcmp(this_char, MNTOPT_NOATTR2)) { - args->flags &= ~XFSMNT_ATTR2; - } else if (!strcmp(this_char, "osyncisdsync")) { - /* no-op, this is now the default */ -printf("XFS: osyncisdsync is now the default, option is deprecated.\n"); - } else if (!strcmp(this_char, "irixsgid")) { -printf("XFS: irixsgid is now a sysctl(2) variable, option is deprecated.\n"); - } else { - printf("XFS: unknown mount option [%s].\n", this_char); - return EINVAL; - } - } - - if (args->flags & XFSMNT_NORECOVERY) { - if ((vfsp->vfs_flag & VFS_RDONLY) == 0) { - printf("XFS: no-recovery mounts must be read-only.\n"); - return EINVAL; - } - } - - if ((args->flags & XFSMNT_NOALIGN) && (dsunit || dswidth)) { - printf( - "XFS: sunit and swidth options incompatible with the noalign option\n"); - return EINVAL; - } - - if ((dsunit && !dswidth) || (!dsunit && dswidth)) { - printf("XFS: sunit and swidth must be specified together\n"); - return EINVAL; - } - - if (dsunit && (dswidth % dsunit != 0)) { - printf( - "XFS: stripe width (%d) must be a multiple of the stripe unit (%d)\n", - dswidth, dsunit); - return EINVAL; - } - - if ((args->flags & XFSMNT_NOALIGN) != XFSMNT_NOALIGN) { - if (dsunit) { - args->sunit = dsunit; - args->flags |= XFSMNT_RETERR; - } else { - args->sunit = vol_dsunit; - } - dswidth ? (args->swidth = dswidth) : - (args->swidth = vol_dswidth); - } else { - args->sunit = args->swidth = 0; - } - -done: - if (args->flags & XFSMNT_32BITINODES) - vfsp->vfs_flag |= VFS_32BITINODES; - if (args->flags2) - args->flags |= XFSMNT_FLAGS2; - return 0; -} - -#define seq_printf sbuf_printf -STATIC int -xfs_showargs( - struct bhv_desc *bhv, - struct sbuf *m) -{ - static struct proc_xfs_info { - int flag; - char *str; - } xfs_info[] = { - /* the few simple ones we can get from the mount struct */ - { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC }, - { XFS_MOUNT_INO64, "," MNTOPT_INO64 }, - { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN }, - { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC }, - { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID }, - { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY }, - { XFS_MOUNT_OSYNCISOSYNC, "," MNTOPT_OSYNCISOSYNC }, - { 0, NULL } - }; - struct proc_xfs_info *xfs_infop; - struct xfs_mount *mp = XFS_BHVTOM(bhv); - struct xfs_vfs *vfsp = XFS_MTOVFS(mp); - - for (xfs_infop = xfs_info; xfs_infop->flag; xfs_infop++) { - if (mp->m_flags & xfs_infop->flag) - sbuf_printf(m, "%s", xfs_infop->str); - } - - if (mp->m_flags & XFS_MOUNT_IHASHSIZE) - seq_printf(m, "," MNTOPT_IHASHSIZE "=%d", mp->m_ihsize); - - if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) - seq_printf(m, "," MNTOPT_ALLOCSIZE "=%dk", - (int)(1 << mp->m_writeio_log) >> 10); - - if (mp->m_logbufs > 0) - sbuf_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs); - if (mp->m_logbsize > 0) - seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10); - - if (mp->m_logname) - seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname); - if (mp->m_rtname) - seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname); - - if (mp->m_dalign > 0) - sbuf_printf(m, "," MNTOPT_SUNIT "=%d", - (int)XFS_FSB_TO_BB(mp, mp->m_dalign)); - if (mp->m_swidth > 0) - sbuf_printf(m, "," MNTOPT_SWIDTH "=%d", - (int)XFS_FSB_TO_BB(mp, mp->m_swidth)); - - if (!(mp->m_flags & XFS_MOUNT_IDELETE)) - seq_printf(m, "," MNTOPT_IKEEP); - if (!(mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)) - seq_printf(m, "," MNTOPT_LARGEIO); - - if (!(vfsp->vfs_flag & VFS_32BITINODES)) - sbuf_printf(m, "," MNTOPT_64BITINODE); - if (vfsp->vfs_flag & VFS_GRPID) - seq_printf(m, "," MNTOPT_GRPID); - - return 0; -} - -STATIC void -xfs_freeze( - bhv_desc_t *bdp) -{ - xfs_mount_t *mp = XFS_BHVTOM(bdp); - - while (atomic_read(&mp->m_active_trans) > 0) - delay(100); - - /* Push the superblock and write an unmount record */ - xfs_log_unmount_write(mp); - xfs_unmountfs_writesb(mp); - xfs_fs_log_dummy(mp); -} - - -xvfsops_t xfs_vfsops = { - BHV_IDENTITY_INIT(VFS_BHV_XFS,VFS_POSITION_XFS), - .xvfs_parseargs = xfs_parseargs, - .xvfs_showargs = xfs_showargs, - .xvfs_mount = xfs_mount, - .xvfs_unmount = xfs_unmount, - .xvfs_mntupdate = xfs_mntupdate, - .xvfs_root = xfs_root, - .xvfs_statvfs = xfs_statvfs, - .xvfs_sync = xfs_sync, - .xvfs_vget = xfs_vget, - .xvfs_dmapiops = (xvfs_dmapiops_t)fs_nosys, - .xvfs_quotactl = (xvfs_quotactl_t)fs_nosys, - .xvfs_get_inode = (xvfs_get_inode_t)fs_nosys, - .xvfs_init_vnode = xfs_initialize_vnode, - .xvfs_force_shutdown = xfs_do_force_shutdown, - .xvfs_freeze = xfs_freeze, -}; |
