patch-2.4.25 linux-2.4.25/fs/xfs/xfs_vfsops.c
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- Lines: 1872
- Date:
2004-02-18 05:36:32.000000000 -0800
- Orig file:
linux-2.4.24/fs/xfs/xfs_vfsops.c
- Orig date:
1969-12-31 16:00:00.000000000 -0800
diff -urN linux-2.4.24/fs/xfs/xfs_vfsops.c linux-2.4.25/fs/xfs/xfs_vfsops.c
@@ -0,0 +1,1871 @@
+/*
+ * XFS filesystem operations.
+ *
+ * Copyright (c) 2000-2003 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/
+ */
+
+#include "xfs.h"
+#include "xfs_macros.h"
+#include "xfs_types.h"
+#include "xfs_inum.h"
+#include "xfs_log.h"
+#include "xfs_trans.h"
+#include "xfs_sb.h"
+#include "xfs_dir.h"
+#include "xfs_dir2.h"
+#include "xfs_dmapi.h"
+#include "xfs_mount.h"
+#include "xfs_bmap_btree.h"
+#include "xfs_ialloc_btree.h"
+#include "xfs_alloc_btree.h"
+#include "xfs_btree.h"
+#include "xfs_alloc.h"
+#include "xfs_ialloc.h"
+#include "xfs_attr_sf.h"
+#include "xfs_dir_sf.h"
+#include "xfs_dir2_sf.h"
+#include "xfs_dinode.h"
+#include "xfs_inode_item.h"
+#include "xfs_inode.h"
+#include "xfs_ag.h"
+#include "xfs_error.h"
+#include "xfs_bmap.h"
+#include "xfs_da_btree.h"
+#include "xfs_rw.h"
+#include "xfs_refcache.h"
+#include "xfs_buf_item.h"
+#include "xfs_extfree_item.h"
+#include "xfs_quota.h"
+#include "xfs_dir2_trace.h"
+#include "xfs_acl.h"
+#include "xfs_attr.h"
+#include "xfs_clnt.h"
+#include "xfs_log_priv.h"
+
+STATIC int xfs_sync(bhv_desc_t *, int, cred_t *);
+
+int
+xfs_init(void)
+{
+ 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;
+#ifdef XFS_DABUF_DEBUG
+ extern lock_t xfs_dabuf_global_lock;
+ 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_inode_zone = kmem_zone_init(sizeof(xfs_inode_t), "xfs_inode");
+ 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");
+
+ /*
+ * 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");
+ xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
+ xfs_ili_zone = kmem_zone_init(sizeof(xfs_inode_log_item_t), "xfs_ili");
+ xfs_chashlist_zone = kmem_zone_init(sizeof(xfs_chashlist_t),
+ "xfs_chashlist");
+ _ACL_ZONE_INIT(xfs_acl_zone, "xfs_acl");
+
+ /*
+ * 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_init_procfs();
+ xfs_sysctl_register();
+ return 0;
+}
+
+void
+xfs_cleanup(void)
+{
+ 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;
+
+ xfs_cleanup_procfs();
+ xfs_sysctl_unregister();
+ xfs_refcache_destroy();
+
+#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_cache_destroy(xfs_bmap_free_item_zone);
+ kmem_cache_destroy(xfs_btree_cur_zone);
+ kmem_cache_destroy(xfs_inode_zone);
+ kmem_cache_destroy(xfs_trans_zone);
+ kmem_cache_destroy(xfs_da_state_zone);
+ kmem_cache_destroy(xfs_dabuf_zone);
+ kmem_cache_destroy(xfs_buf_item_zone);
+ kmem_cache_destroy(xfs_efd_zone);
+ kmem_cache_destroy(xfs_efi_zone);
+ kmem_cache_destroy(xfs_ifork_zone);
+ kmem_cache_destroy(xfs_ili_zone);
+ kmem_cache_destroy(xfs_chashlist_zone);
+ _ACL_ZONE_DESTROY(xfs_acl_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_mount_args *ap,
+ struct xfs_mount *mp,
+ int ronly)
+{
+ /* 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 != 0 && ap->logbufs != -1 &&
+ (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 != 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_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);
+
+ /*
+ * Pull in the 'wsync' and 'ino64' mount options before we do the real
+ * work of mounting and recovery. The arg pointer will
+ * be NULL when we are being called from the root mount code.
+ */
+ 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_NOATIME)
+ mp->m_flags |= XFS_MOUNT_NOATIME;
+
+ 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_OSYNCISOSYNC)
+ mp->m_flags |= XFS_MOUNT_OSYNCISOSYNC;
+
+ if (ap->flags & XFSMNT_32BITINODES)
+ mp->m_flags |= (XFS_MOUNT_32BITINODES | XFS_MOUNT_32BITINOOPT);
+
+ 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_IDELETE)
+ mp->m_flags |= XFS_MOUNT_IDELETE;
+
+ /*
+ * no recovery flag requires a read-only mount
+ */
+ if (ap->flags & XFSMNT_NORECOVERY) {
+ if (!ronly) {
+ 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_NOLOGFLUSH)
+ mp->m_flags |= XFS_MOUNT_NOLOGFLUSH;
+
+ 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_mount_args *ap,
+ struct xfs_mount *mp,
+ int ronly)
+{
+ /* Fail a mount where the logbuf is smaller then the log stripe */
+ if (XFS_SB_VERSION_HASLOGV2(&mp->m_sb)) {
+ if ((ap->logbufsize == -1) &&
+ (mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE)) {
+ mp->m_logbsize = mp->m_sb.sb_logsunit;
+ } else if (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);
+ }
+ }
+
+ /*
+ * 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);
+ }
+
+ /*
+ * disallow mount attempts with (IRIX) project quota enabled
+ */
+ if (XFS_SB_VERSION_HASQUOTA(&mp->m_sb) &&
+ (mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT)) {
+ cmn_err(CE_WARN,
+ "XFS: cannot mount a filesystem with IRIX project quota enabled");
+ return XFS_ERROR(ENOSYS);
+ }
+
+ /*
+ * 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 vfs *vfsp = bhvtovfs(bhvp);
+ struct bhv_desc *p;
+ struct xfs_mount *mp = XFS_BHVTOM(bhvp);
+ struct block_device *ddev, *logdev, *rtdev;
+ int ronly = (vfsp->vfs_flag & VFS_RDONLY);
+ int flags = 0, error;
+
+ ddev = vfsp->vfs_super->s_bdev;
+ logdev = rtdev = NULL;
+
+ /*
+ * Open real time and log devices - order is important.
+ */
+ if (args->logname[0]) {
+ error = xfs_blkdev_get(mp, args->logname, &logdev);
+ if (error)
+ return error;
+ }
+ if (args->rtname[0]) {
+ error = xfs_blkdev_get(mp, args->rtname, &rtdev);
+ if (error) {
+ xfs_blkdev_put(logdev);
+ 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);
+ return EINVAL;
+ }
+ }
+
+ /*
+ * 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_xfs;
+ p = vfs_bhv_lookup(vfsp, VFS_POSITION_QM);
+ mp->m_qm_ops = p ? *(xfs_qmops_t *) vfs_bhv_custom(p) : xfs_qmcore_xfs;
+ p = vfs_bhv_lookup(vfsp, VFS_POSITION_IO);
+ mp->m_io_ops = p ? *(xfs_ioops_t *) vfs_bhv_custom(p) : xfs_iocore_xfs;
+
+ /*
+ * Setup xfs_mount buffer target pointers
+ */
+ mp->m_ddev_targp = xfs_alloc_buftarg(ddev);
+ if (rtdev)
+ mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev);
+ mp->m_logdev_targp = (logdev && logdev != ddev) ?
+ xfs_alloc_buftarg(logdev) : mp->m_ddev_targp;
+
+ /*
+ * Setup flags based on mount(2) options and then the superblock
+ */
+ error = xfs_start_flags(args, mp, ronly);
+ if (error)
+ goto error;
+ error = xfs_readsb(mp);
+ if (error)
+ goto error;
+ error = xfs_finish_flags(args, mp, ronly);
+ if (error) {
+ xfs_freesb(mp);
+ goto error;
+ }
+
+ /*
+ * Setup xfs_mount buffer target pointers based on superblock
+ */
+ xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_blocksize,
+ mp->m_sb.sb_sectsize);
+ if (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;
+ xfs_setsize_buftarg(mp->m_logdev_targp, mp->m_sb.sb_blocksize,
+ log_sector_size);
+ }
+ if (rtdev)
+ xfs_setsize_buftarg(mp->m_rtdev_targp, mp->m_sb.sb_blocksize,
+ mp->m_sb.sb_blocksize);
+
+ if (!(error = XFS_IOINIT(vfsp, args, flags)))
+ return 0;
+
+ error:
+ xfs_binval(mp->m_ddev_targp);
+ if (logdev != NULL && logdev != ddev) {
+ xfs_binval(mp->m_logdev_targp);
+ }
+ if (rtdev != NULL) {
+ xfs_binval(mp->m_rtdev_targp);
+ }
+ xfs_unmountfs_close(mp, NULL);
+ return error;
+}
+
+STATIC int
+xfs_unmount(
+ bhv_desc_t *bdp,
+ int flags,
+ cred_t *credp)
+{
+ struct vfs *vfsp = bhvtovfs(bdp);
+ xfs_mount_t *mp = XFS_BHVTOM(bdp);
+ xfs_inode_t *rip;
+ 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_NAMESP(mp, DM_EVENT_PREUNMOUNT,
+ 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;
+ }
+
+ /*
+ * 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);
+}
+
+#define REMOUNT_READONLY_FLAGS (SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT)
+
+STATIC int
+xfs_mntupdate(
+ bhv_desc_t *bdp,
+ int *flags,
+ struct xfs_mount_args *args)
+{
+ struct vfs *vfsp = bhvtovfs(bdp);
+ xfs_mount_t *mp = XFS_BHVTOM(bdp);
+ int pincount, error;
+ int count = 0;
+
+ if (args->flags & XFSMNT_NOATIME)
+ mp->m_flags |= XFS_MOUNT_NOATIME;
+ else
+ mp->m_flags &= ~XFS_MOUNT_NOATIME;
+
+ if (!(vfsp->vfs_flag & VFS_RDONLY)) {
+ VFS_SYNC(vfsp, SYNC_FSDATA|SYNC_BDFLUSH|SYNC_ATTR, NULL, error);
+ }
+
+ if (*flags & MS_RDONLY) {
+ xfs_refcache_purge_mp(mp);
+ pagebuf_delwri_flush(mp->m_ddev_targp, 0, NULL);
+ 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 {
+ VFS_SYNC(vfsp, REMOUNT_READONLY_FLAGS, NULL, error);
+ pagebuf_delwri_flush(mp->m_ddev_targp, PBDF_WAIT,
+ &pincount);
+ if(0 == pincount) { delay(50); count++; }
+ } while (count < 2);
+
+ /* Ok now write out an unmount record */
+ xfs_log_unmount_write(mp);
+ xfs_unmountfs_writesb(mp);
+ vfsp->vfs_flag |= VFS_RDONLY;
+ } else {
+ 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;
+ vnode_t *rvp = XFS_ITOV(rip);
+ int error;
+
+ 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,
+ vnode_t **vpp)
+{
+ 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,
+ 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;
+
+ 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);
+
+ statp->f_fsid.val[0] = mp->m_dev;
+ statp->f_fsid.val[1] = 0;
+ statp->f_namelen = MAXNAMELEN - 1;
+
+ 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 everthing.
+ * SYNC_FSDATA - This indicates that the caller would like to make
+ * sure the superblock is safe on disk. We can ensure
+ * this by simply makeing 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;
+
+ mp = XFS_BHVTOM(bdp);
+ 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 internallly-
+ * required functions are specified within a separate xflags parameter,
+ * only available by calling this routine.
+ *
+ */
+STATIC 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;
+ vnode_t *vp = NULL;
+ vmap_t vmap;
+ 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)
+ 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 (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 racey, 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. It is also cheaper and simpler than actually doing
+ * a vn_get() for every inode we touch here.
+ */
+ if (xfs_ilock_nowait(ip, lock_flags) == 0) {
+
+ if ((flags & SYNC_BDFLUSH) || (vp == NULL)) {
+ ip = ip->i_mnext;
+ continue;
+ }
+
+ /*
+ * We need to unlock the inode list lock in order
+ * to lock the inode. Insert a marker record into
+ * the inode list to remember our position, dropping
+ * the lock is now done inside the IPOINTER_INSERT
+ * macro.
+ *
+ * We also use the inode list lock to protect us
+ * in taking a snapshot of the vnode version number
+ * for use in calling vn_get().
+ */
+ VMAP(vp, vmap);
+ IPOINTER_INSERT(ip, mp);
+
+ vp = vn_get(vp, &vmap);
+ if (vp == NULL) {
+ /*
+ * The vnode was reclaimed once we let go
+ * of the inode list lock. Skip to the
+ * next list entry. Remove the marker.
+ */
+
+ XFS_MOUNT_ILOCK(mp);
+
+ mount_locked = B_TRUE;
+ vnode_refed = B_FALSE;
+
+ IPOINTER_REMOVE(ip, mp);
+
+ continue;
+ }
+
+ 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)) {
+ VOP_TOSS_PAGES(vp, 0, -1, FI_REMAPF);
+ } else {
+ VOP_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);
+ VOP_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);
+ 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 internallly-
+ * 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_BFLAGS(bp) |= XFS_B_ASYNC;
+ 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) {
+ 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 to get vnode from file handle
+ */
+STATIC int
+xfs_vget(
+ bhv_desc_t *bdp,
+ vnode_t **vpp,
+ fid_t *fidp)
+{
+ xfs_fid_t *xfid;
+ xfs_inode_t *ip;
+ int error;
+ xfs_ino_t ino;
+ unsigned int igen;
+ xfs_mount_t *mp;
+
+ xfid = (struct xfs_fid *)fidp;
+ if (xfid->xfs_fid_len == sizeof(*xfid) - sizeof(xfid->xfs_fid_len)) {
+ ino = xfid->xfs_fid_ino;
+ igen = xfid->xfs_fid_gen;
+ } else {
+ /*
+ * Invalid. Since handles can be created in user space
+ * and passed in via gethandle(), this is not cause for
+ * a panic.
+ */
+ return XFS_ERROR(EINVAL);
+ }
+ mp = XFS_BHVTOM(bdp);
+ error = xfs_iget(mp, NULL, ino, 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 || (igen && (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_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_NORECOVERY "norecovery" /* don't run XFS recovery */
+#define MNTOPT_NOLOGFLUSH "nologflush" /* don't hard flush on log writes */
+#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 */
+
+
+int
+xfs_parseargs(
+ struct bhv_desc *bhv,
+ char *options,
+ struct xfs_mount_args *args,
+ int update)
+{
+ struct vfs *vfsp = bhvtovfs(bhv);
+ char *this_char, *value, *eov;
+ int dsunit, dswidth, vol_dsunit, vol_dswidth;
+ int iosize;
+
+#if 0 /* XXX: off by default, until some remaining issues ironed out */
+ args->flags |= XFSMNT_IDELETE; /* default to on */
+#endif
+
+ if (!options)
+ return 0;
+
+ 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) {
+ printk("XFS: %s option requires an argument\n",
+ MNTOPT_LOGBUFS);
+ return EINVAL;
+ }
+ args->logbufs = simple_strtoul(value, &eov, 10);
+ } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
+ int last, in_kilobytes = 0;
+
+ if (!value || !*value) {
+ printk("XFS: %s option requires an argument\n",
+ MNTOPT_LOGBSIZE);
+ return EINVAL;
+ }
+ last = strlen(value) - 1;
+ if (value[last] == 'K' || value[last] == 'k') {
+ in_kilobytes = 1;
+ value[last] = '\0';
+ }
+ args->logbufsize = simple_strtoul(value, &eov, 10);
+ if (in_kilobytes)
+ args->logbufsize <<= 10;
+ } else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
+ if (!value || !*value) {
+ printk("XFS: %s option requires an argument\n",
+ MNTOPT_LOGDEV);
+ return EINVAL;
+ }
+ strncpy(args->logname, value, MAXNAMELEN);
+ } else if (!strcmp(this_char, MNTOPT_MTPT)) {
+ if (!value || !*value) {
+ printk("XFS: %s option requires an argument\n",
+ MNTOPT_MTPT);
+ return EINVAL;
+ }
+ strncpy(args->mtpt, value, MAXNAMELEN);
+ } else if (!strcmp(this_char, MNTOPT_RTDEV)) {
+ if (!value || !*value) {
+ printk("XFS: %s option requires an argument\n",
+ MNTOPT_RTDEV);
+ return EINVAL;
+ }
+ strncpy(args->rtname, value, MAXNAMELEN);
+ } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) {
+ if (!value || !*value) {
+ printk("XFS: %s option requires an argument\n",
+ MNTOPT_BIOSIZE);
+ return EINVAL;
+ }
+ iosize = simple_strtoul(value, &eov, 10);
+ args->flags |= XFSMNT_IOSIZE;
+ args->iosizelog = (uint8_t) iosize;
+ } 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
+ printk("XFS: %s option not allowed on this system\n",
+ MNTOPT_INO64);
+ return EINVAL;
+#endif
+ } else if (!strcmp(this_char, MNTOPT_NOALIGN)) {
+ args->flags |= XFSMNT_NOALIGN;
+ } else if (!strcmp(this_char, MNTOPT_SUNIT)) {
+ if (!value || !*value) {
+ printk("XFS: %s option requires an argument\n",
+ MNTOPT_SUNIT);
+ return EINVAL;
+ }
+ dsunit = simple_strtoul(value, &eov, 10);
+ } else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
+ if (!value || !*value) {
+ printk("XFS: %s option requires an argument\n",
+ MNTOPT_SWIDTH);
+ return EINVAL;
+ }
+ dswidth = simple_strtoul(value, &eov, 10);
+ } else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
+ args->flags &= ~XFSMNT_32BITINODES;
+#if !XFS_BIG_INUMS
+ printk("XFS: %s option not allowed on this system\n",
+ MNTOPT_64BITINODE);
+ return EINVAL;
+#endif
+ } else if (!strcmp(this_char, MNTOPT_NOUUID)) {
+ args->flags |= XFSMNT_NOUUID;
+ } else if (!strcmp(this_char, MNTOPT_NOLOGFLUSH)) {
+ args->flags |= XFSMNT_NOLOGFLUSH;
+ } 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, "osyncisdsync")) {
+ /* no-op, this is now the default */
+printk("XFS: osyncisdsync is now the default, option is deprecated.\n");
+ } else if (!strcmp(this_char, "irixsgid")) {
+printk("XFS: irixsgid is now a sysctl(2) variable, option is deprecated.\n");
+ } else {
+ printk("XFS: unknown mount option [%s].\n", this_char);
+ return EINVAL;
+ }
+ }
+
+ if (args->flags & XFSMNT_NORECOVERY) {
+ if ((vfsp->vfs_flag & VFS_RDONLY) == 0) {
+ printk("XFS: no-recovery mounts must be read-only.\n");
+ return EINVAL;
+ }
+ }
+
+ if ((args->flags & XFSMNT_NOALIGN) && (dsunit || dswidth)) {
+ printk(
+ "XFS: sunit and swidth options incompatible with the noalign option\n");
+ return EINVAL;
+ }
+
+ if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
+ printk("XFS: sunit and swidth must be specified together\n");
+ return EINVAL;
+ }
+
+ if (dsunit && (dswidth % dsunit != 0)) {
+ printk(
+ "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;
+ }
+
+ return 0;
+}
+
+int
+xfs_showargs(
+ struct bhv_desc *bhv,
+ struct seq_file *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_NOUUID, "," MNTOPT_NOUUID },
+ { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY },
+ { XFS_MOUNT_OSYNCISOSYNC, "," MNTOPT_OSYNCISOSYNC },
+ { XFS_MOUNT_NOLOGFLUSH, "," MNTOPT_NOLOGFLUSH },
+ { XFS_MOUNT_IDELETE, "," MNTOPT_NOIKEEP },
+ { 0, NULL }
+ };
+ struct proc_xfs_info *xfs_infop;
+ struct xfs_mount *mp = XFS_BHVTOM(bhv);
+
+ for (xfs_infop = xfs_info; xfs_infop->flag; xfs_infop++) {
+ if (mp->m_flags & xfs_infop->flag)
+ seq_puts(m, xfs_infop->str);
+ }
+
+ if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)
+ seq_printf(m, "," MNTOPT_BIOSIZE "=%d", mp->m_writeio_log);
+
+ if (mp->m_logbufs > 0)
+ seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs);
+
+ if (mp->m_logbsize > 0)
+ seq_printf(m, "," MNTOPT_LOGBSIZE "=%d", mp->m_logbsize);
+
+ if (mp->m_ddev_targp != mp->m_logdev_targp)
+ seq_printf(m, "," MNTOPT_LOGDEV "=%s",
+ XFS_BUFTARG_NAME(mp->m_logdev_targp));
+
+ if (mp->m_rtdev_targp && mp->m_ddev_targp != mp->m_rtdev_targp)
+ seq_printf(m, "," MNTOPT_RTDEV "=%s",
+ XFS_BUFTARG_NAME(mp->m_rtdev_targp));
+
+ if (mp->m_dalign > 0)
+ seq_printf(m, "," MNTOPT_SUNIT "=%d",
+ (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
+
+ if (mp->m_swidth > 0)
+ seq_printf(m, "," MNTOPT_SWIDTH "=%d",
+ (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
+
+ if (!(mp->m_flags & XFS_MOUNT_32BITINOOPT))
+ seq_printf(m, "," MNTOPT_64BITINODE);
+
+ return 0;
+}
+
+
+vfsops_t xfs_vfsops = {
+ BHV_IDENTITY_INIT(VFS_BHV_XFS,VFS_POSITION_XFS),
+ .vfs_parseargs = xfs_parseargs,
+ .vfs_showargs = xfs_showargs,
+ .vfs_mount = xfs_mount,
+ .vfs_unmount = xfs_unmount,
+ .vfs_mntupdate = xfs_mntupdate,
+ .vfs_root = xfs_root,
+ .vfs_statvfs = xfs_statvfs,
+ .vfs_sync = xfs_sync,
+ .vfs_vget = xfs_vget,
+ .vfs_dmapiops = (vfs_dmapiops_t)fs_nosys,
+ .vfs_quotactl = (vfs_quotactl_t)fs_nosys,
+ .vfs_get_inode = xfs_get_inode,
+ .vfs_init_vnode = xfs_initialize_vnode,
+ .vfs_force_shutdown = xfs_do_force_shutdown,
+};
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)