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-rw-r--r--fs/xfs/xfs_super.c2407
1 files changed, 2407 insertions, 0 deletions
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
new file mode 100644
index 000000000..12662b169
--- /dev/null
+++ b/fs/xfs/xfs_super.c
@@ -0,0 +1,2407 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2000-2006 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ */
+
+#include "xfs.h"
+#include "xfs_shared.h"
+#include "xfs_format.h"
+#include "xfs_log_format.h"
+#include "xfs_trans_resv.h"
+#include "xfs_sb.h"
+#include "xfs_mount.h"
+#include "xfs_inode.h"
+#include "xfs_btree.h"
+#include "xfs_bmap.h"
+#include "xfs_alloc.h"
+#include "xfs_fsops.h"
+#include "xfs_trans.h"
+#include "xfs_buf_item.h"
+#include "xfs_log.h"
+#include "xfs_log_priv.h"
+#include "xfs_dir2.h"
+#include "xfs_extfree_item.h"
+#include "xfs_mru_cache.h"
+#include "xfs_inode_item.h"
+#include "xfs_icache.h"
+#include "xfs_trace.h"
+#include "xfs_icreate_item.h"
+#include "xfs_filestream.h"
+#include "xfs_quota.h"
+#include "xfs_sysfs.h"
+#include "xfs_ondisk.h"
+#include "xfs_rmap_item.h"
+#include "xfs_refcount_item.h"
+#include "xfs_bmap_item.h"
+#include "xfs_reflink.h"
+#include "xfs_pwork.h"
+#include "xfs_ag.h"
+#include "xfs_defer.h"
+#include "xfs_attr_item.h"
+#include "xfs_xattr.h"
+#include "xfs_iunlink_item.h"
+
+#include <linux/magic.h>
+#include <linux/fs_context.h>
+#include <linux/fs_parser.h>
+
+static const struct super_operations xfs_super_operations;
+
+static struct kset *xfs_kset; /* top-level xfs sysfs dir */
+#ifdef DEBUG
+static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */
+#endif
+
+#ifdef CONFIG_HOTPLUG_CPU
+static LIST_HEAD(xfs_mount_list);
+static DEFINE_SPINLOCK(xfs_mount_list_lock);
+
+static inline void xfs_mount_list_add(struct xfs_mount *mp)
+{
+ spin_lock(&xfs_mount_list_lock);
+ list_add(&mp->m_mount_list, &xfs_mount_list);
+ spin_unlock(&xfs_mount_list_lock);
+}
+
+static inline void xfs_mount_list_del(struct xfs_mount *mp)
+{
+ spin_lock(&xfs_mount_list_lock);
+ list_del(&mp->m_mount_list);
+ spin_unlock(&xfs_mount_list_lock);
+}
+#else /* !CONFIG_HOTPLUG_CPU */
+static inline void xfs_mount_list_add(struct xfs_mount *mp) {}
+static inline void xfs_mount_list_del(struct xfs_mount *mp) {}
+#endif
+
+enum xfs_dax_mode {
+ XFS_DAX_INODE = 0,
+ XFS_DAX_ALWAYS = 1,
+ XFS_DAX_NEVER = 2,
+};
+
+static void
+xfs_mount_set_dax_mode(
+ struct xfs_mount *mp,
+ enum xfs_dax_mode mode)
+{
+ switch (mode) {
+ case XFS_DAX_INODE:
+ mp->m_features &= ~(XFS_FEAT_DAX_ALWAYS | XFS_FEAT_DAX_NEVER);
+ break;
+ case XFS_DAX_ALWAYS:
+ mp->m_features |= XFS_FEAT_DAX_ALWAYS;
+ mp->m_features &= ~XFS_FEAT_DAX_NEVER;
+ break;
+ case XFS_DAX_NEVER:
+ mp->m_features |= XFS_FEAT_DAX_NEVER;
+ mp->m_features &= ~XFS_FEAT_DAX_ALWAYS;
+ break;
+ }
+}
+
+static const struct constant_table dax_param_enums[] = {
+ {"inode", XFS_DAX_INODE },
+ {"always", XFS_DAX_ALWAYS },
+ {"never", XFS_DAX_NEVER },
+ {}
+};
+
+/*
+ * Table driven mount option parser.
+ */
+enum {
+ Opt_logbufs, Opt_logbsize, Opt_logdev, Opt_rtdev,
+ Opt_wsync, Opt_noalign, Opt_swalloc, Opt_sunit, Opt_swidth, Opt_nouuid,
+ Opt_grpid, Opt_nogrpid, Opt_bsdgroups, Opt_sysvgroups,
+ Opt_allocsize, Opt_norecovery, Opt_inode64, Opt_inode32, Opt_ikeep,
+ Opt_noikeep, Opt_largeio, Opt_nolargeio, Opt_attr2, Opt_noattr2,
+ Opt_filestreams, Opt_quota, Opt_noquota, Opt_usrquota, Opt_grpquota,
+ Opt_prjquota, Opt_uquota, Opt_gquota, Opt_pquota,
+ Opt_uqnoenforce, Opt_gqnoenforce, Opt_pqnoenforce, Opt_qnoenforce,
+ Opt_discard, Opt_nodiscard, Opt_dax, Opt_dax_enum,
+};
+
+static const struct fs_parameter_spec xfs_fs_parameters[] = {
+ fsparam_u32("logbufs", Opt_logbufs),
+ fsparam_string("logbsize", Opt_logbsize),
+ fsparam_string("logdev", Opt_logdev),
+ fsparam_string("rtdev", Opt_rtdev),
+ fsparam_flag("wsync", Opt_wsync),
+ fsparam_flag("noalign", Opt_noalign),
+ fsparam_flag("swalloc", Opt_swalloc),
+ fsparam_u32("sunit", Opt_sunit),
+ fsparam_u32("swidth", Opt_swidth),
+ fsparam_flag("nouuid", Opt_nouuid),
+ fsparam_flag("grpid", Opt_grpid),
+ fsparam_flag("nogrpid", Opt_nogrpid),
+ fsparam_flag("bsdgroups", Opt_bsdgroups),
+ fsparam_flag("sysvgroups", Opt_sysvgroups),
+ fsparam_string("allocsize", Opt_allocsize),
+ fsparam_flag("norecovery", Opt_norecovery),
+ fsparam_flag("inode64", Opt_inode64),
+ fsparam_flag("inode32", Opt_inode32),
+ fsparam_flag("ikeep", Opt_ikeep),
+ fsparam_flag("noikeep", Opt_noikeep),
+ fsparam_flag("largeio", Opt_largeio),
+ fsparam_flag("nolargeio", Opt_nolargeio),
+ fsparam_flag("attr2", Opt_attr2),
+ fsparam_flag("noattr2", Opt_noattr2),
+ fsparam_flag("filestreams", Opt_filestreams),
+ fsparam_flag("quota", Opt_quota),
+ fsparam_flag("noquota", Opt_noquota),
+ fsparam_flag("usrquota", Opt_usrquota),
+ fsparam_flag("grpquota", Opt_grpquota),
+ fsparam_flag("prjquota", Opt_prjquota),
+ fsparam_flag("uquota", Opt_uquota),
+ fsparam_flag("gquota", Opt_gquota),
+ fsparam_flag("pquota", Opt_pquota),
+ fsparam_flag("uqnoenforce", Opt_uqnoenforce),
+ fsparam_flag("gqnoenforce", Opt_gqnoenforce),
+ fsparam_flag("pqnoenforce", Opt_pqnoenforce),
+ fsparam_flag("qnoenforce", Opt_qnoenforce),
+ fsparam_flag("discard", Opt_discard),
+ fsparam_flag("nodiscard", Opt_nodiscard),
+ fsparam_flag("dax", Opt_dax),
+ fsparam_enum("dax", Opt_dax_enum, dax_param_enums),
+ {}
+};
+
+struct proc_xfs_info {
+ uint64_t flag;
+ char *str;
+};
+
+static int
+xfs_fs_show_options(
+ struct seq_file *m,
+ struct dentry *root)
+{
+ static struct proc_xfs_info xfs_info_set[] = {
+ /* the few simple ones we can get from the mount struct */
+ { XFS_FEAT_IKEEP, ",ikeep" },
+ { XFS_FEAT_WSYNC, ",wsync" },
+ { XFS_FEAT_NOALIGN, ",noalign" },
+ { XFS_FEAT_SWALLOC, ",swalloc" },
+ { XFS_FEAT_NOUUID, ",nouuid" },
+ { XFS_FEAT_NORECOVERY, ",norecovery" },
+ { XFS_FEAT_ATTR2, ",attr2" },
+ { XFS_FEAT_FILESTREAMS, ",filestreams" },
+ { XFS_FEAT_GRPID, ",grpid" },
+ { XFS_FEAT_DISCARD, ",discard" },
+ { XFS_FEAT_LARGE_IOSIZE, ",largeio" },
+ { XFS_FEAT_DAX_ALWAYS, ",dax=always" },
+ { XFS_FEAT_DAX_NEVER, ",dax=never" },
+ { 0, NULL }
+ };
+ struct xfs_mount *mp = XFS_M(root->d_sb);
+ struct proc_xfs_info *xfs_infop;
+
+ for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
+ if (mp->m_features & xfs_infop->flag)
+ seq_puts(m, xfs_infop->str);
+ }
+
+ seq_printf(m, ",inode%d", xfs_has_small_inums(mp) ? 32 : 64);
+
+ if (xfs_has_allocsize(mp))
+ seq_printf(m, ",allocsize=%dk",
+ (1 << mp->m_allocsize_log) >> 10);
+
+ if (mp->m_logbufs > 0)
+ seq_printf(m, ",logbufs=%d", mp->m_logbufs);
+ if (mp->m_logbsize > 0)
+ seq_printf(m, ",logbsize=%dk", mp->m_logbsize >> 10);
+
+ if (mp->m_logname)
+ seq_show_option(m, "logdev", mp->m_logname);
+ if (mp->m_rtname)
+ seq_show_option(m, "rtdev", mp->m_rtname);
+
+ if (mp->m_dalign > 0)
+ seq_printf(m, ",sunit=%d",
+ (int)XFS_FSB_TO_BB(mp, mp->m_dalign));
+ if (mp->m_swidth > 0)
+ seq_printf(m, ",swidth=%d",
+ (int)XFS_FSB_TO_BB(mp, mp->m_swidth));
+
+ if (mp->m_qflags & XFS_UQUOTA_ENFD)
+ seq_puts(m, ",usrquota");
+ else if (mp->m_qflags & XFS_UQUOTA_ACCT)
+ seq_puts(m, ",uqnoenforce");
+
+ if (mp->m_qflags & XFS_PQUOTA_ENFD)
+ seq_puts(m, ",prjquota");
+ else if (mp->m_qflags & XFS_PQUOTA_ACCT)
+ seq_puts(m, ",pqnoenforce");
+
+ if (mp->m_qflags & XFS_GQUOTA_ENFD)
+ seq_puts(m, ",grpquota");
+ else if (mp->m_qflags & XFS_GQUOTA_ACCT)
+ seq_puts(m, ",gqnoenforce");
+
+ if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
+ seq_puts(m, ",noquota");
+
+ return 0;
+}
+
+/*
+ * Set parameters for inode allocation heuristics, taking into account
+ * filesystem size and inode32/inode64 mount options; i.e. specifically
+ * whether or not XFS_FEAT_SMALL_INUMS is set.
+ *
+ * Inode allocation patterns are altered only if inode32 is requested
+ * (XFS_FEAT_SMALL_INUMS), and the filesystem is sufficiently large.
+ * If altered, XFS_OPSTATE_INODE32 is set as well.
+ *
+ * An agcount independent of that in the mount structure is provided
+ * because in the growfs case, mp->m_sb.sb_agcount is not yet updated
+ * to the potentially higher ag count.
+ *
+ * Returns the maximum AG index which may contain inodes.
+ */
+xfs_agnumber_t
+xfs_set_inode_alloc(
+ struct xfs_mount *mp,
+ xfs_agnumber_t agcount)
+{
+ xfs_agnumber_t index;
+ xfs_agnumber_t maxagi = 0;
+ xfs_sb_t *sbp = &mp->m_sb;
+ xfs_agnumber_t max_metadata;
+ xfs_agino_t agino;
+ xfs_ino_t ino;
+
+ /*
+ * Calculate how much should be reserved for inodes to meet
+ * the max inode percentage. Used only for inode32.
+ */
+ if (M_IGEO(mp)->maxicount) {
+ uint64_t icount;
+
+ icount = sbp->sb_dblocks * sbp->sb_imax_pct;
+ do_div(icount, 100);
+ icount += sbp->sb_agblocks - 1;
+ do_div(icount, sbp->sb_agblocks);
+ max_metadata = icount;
+ } else {
+ max_metadata = agcount;
+ }
+
+ /* Get the last possible inode in the filesystem */
+ agino = XFS_AGB_TO_AGINO(mp, sbp->sb_agblocks - 1);
+ ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino);
+
+ /*
+ * If user asked for no more than 32-bit inodes, and the fs is
+ * sufficiently large, set XFS_OPSTATE_INODE32 if we must alter
+ * the allocator to accommodate the request.
+ */
+ if (xfs_has_small_inums(mp) && ino > XFS_MAXINUMBER_32)
+ set_bit(XFS_OPSTATE_INODE32, &mp->m_opstate);
+ else
+ clear_bit(XFS_OPSTATE_INODE32, &mp->m_opstate);
+
+ for (index = 0; index < agcount; index++) {
+ struct xfs_perag *pag;
+
+ ino = XFS_AGINO_TO_INO(mp, index, agino);
+
+ pag = xfs_perag_get(mp, index);
+
+ if (xfs_is_inode32(mp)) {
+ if (ino > XFS_MAXINUMBER_32) {
+ pag->pagi_inodeok = 0;
+ pag->pagf_metadata = 0;
+ } else {
+ pag->pagi_inodeok = 1;
+ maxagi++;
+ if (index < max_metadata)
+ pag->pagf_metadata = 1;
+ else
+ pag->pagf_metadata = 0;
+ }
+ } else {
+ pag->pagi_inodeok = 1;
+ pag->pagf_metadata = 0;
+ }
+
+ xfs_perag_put(pag);
+ }
+
+ return xfs_is_inode32(mp) ? maxagi : agcount;
+}
+
+static int
+xfs_setup_dax_always(
+ struct xfs_mount *mp)
+{
+ if (!mp->m_ddev_targp->bt_daxdev &&
+ (!mp->m_rtdev_targp || !mp->m_rtdev_targp->bt_daxdev)) {
+ xfs_alert(mp,
+ "DAX unsupported by block device. Turning off DAX.");
+ goto disable_dax;
+ }
+
+ if (mp->m_super->s_blocksize != PAGE_SIZE) {
+ xfs_alert(mp,
+ "DAX not supported for blocksize. Turning off DAX.");
+ goto disable_dax;
+ }
+
+ if (xfs_has_reflink(mp) &&
+ bdev_is_partition(mp->m_ddev_targp->bt_bdev)) {
+ xfs_alert(mp,
+ "DAX and reflink cannot work with multi-partitions!");
+ return -EINVAL;
+ }
+
+ xfs_warn(mp, "DAX enabled. Warning: EXPERIMENTAL, use at your own risk");
+ return 0;
+
+disable_dax:
+ xfs_mount_set_dax_mode(mp, XFS_DAX_NEVER);
+ return 0;
+}
+
+STATIC int
+xfs_blkdev_get(
+ xfs_mount_t *mp,
+ const char *name,
+ struct block_device **bdevp)
+{
+ int error = 0;
+
+ *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
+ mp);
+ if (IS_ERR(*bdevp)) {
+ error = PTR_ERR(*bdevp);
+ xfs_warn(mp, "Invalid device [%s], error=%d", name, error);
+ }
+
+ return error;
+}
+
+STATIC void
+xfs_blkdev_put(
+ struct block_device *bdev)
+{
+ if (bdev)
+ blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
+}
+
+STATIC void
+xfs_close_devices(
+ struct xfs_mount *mp)
+{
+ if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
+ struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
+
+ xfs_free_buftarg(mp->m_logdev_targp);
+ xfs_blkdev_put(logdev);
+ }
+ if (mp->m_rtdev_targp) {
+ struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
+
+ xfs_free_buftarg(mp->m_rtdev_targp);
+ xfs_blkdev_put(rtdev);
+ }
+ xfs_free_buftarg(mp->m_ddev_targp);
+}
+
+/*
+ * 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 sb->s_bdev.
+ */
+STATIC int
+xfs_open_devices(
+ struct xfs_mount *mp)
+{
+ struct block_device *ddev = mp->m_super->s_bdev;
+ struct block_device *logdev = NULL, *rtdev = NULL;
+ int error;
+
+ /*
+ * Open real time and log devices - order is important.
+ */
+ if (mp->m_logname) {
+ error = xfs_blkdev_get(mp, mp->m_logname, &logdev);
+ if (error)
+ return error;
+ }
+
+ if (mp->m_rtname) {
+ error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);
+ if (error)
+ goto out_close_logdev;
+
+ if (rtdev == ddev || rtdev == logdev) {
+ xfs_warn(mp,
+ "Cannot mount filesystem with identical rtdev and ddev/logdev.");
+ error = -EINVAL;
+ goto out_close_rtdev;
+ }
+ }
+
+ /*
+ * Setup xfs_mount buffer target pointers
+ */
+ error = -ENOMEM;
+ mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev);
+ if (!mp->m_ddev_targp)
+ goto out_close_rtdev;
+
+ if (rtdev) {
+ mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev);
+ if (!mp->m_rtdev_targp)
+ goto out_free_ddev_targ;
+ }
+
+ if (logdev && logdev != ddev) {
+ mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev);
+ if (!mp->m_logdev_targp)
+ goto out_free_rtdev_targ;
+ } else {
+ mp->m_logdev_targp = mp->m_ddev_targp;
+ }
+
+ return 0;
+
+ out_free_rtdev_targ:
+ if (mp->m_rtdev_targp)
+ xfs_free_buftarg(mp->m_rtdev_targp);
+ out_free_ddev_targ:
+ xfs_free_buftarg(mp->m_ddev_targp);
+ out_close_rtdev:
+ xfs_blkdev_put(rtdev);
+ out_close_logdev:
+ if (logdev && logdev != ddev)
+ xfs_blkdev_put(logdev);
+ return error;
+}
+
+/*
+ * Setup xfs_mount buffer target pointers based on superblock
+ */
+STATIC int
+xfs_setup_devices(
+ struct xfs_mount *mp)
+{
+ int error;
+
+ error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_sectsize);
+ if (error)
+ return error;
+
+ if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
+ unsigned int log_sector_size = BBSIZE;
+
+ if (xfs_has_sector(mp))
+ log_sector_size = mp->m_sb.sb_logsectsize;
+ error = xfs_setsize_buftarg(mp->m_logdev_targp,
+ log_sector_size);
+ if (error)
+ return error;
+ }
+ if (mp->m_rtdev_targp) {
+ error = xfs_setsize_buftarg(mp->m_rtdev_targp,
+ mp->m_sb.sb_sectsize);
+ if (error)
+ return error;
+ }
+
+ return 0;
+}
+
+STATIC int
+xfs_init_mount_workqueues(
+ struct xfs_mount *mp)
+{
+ mp->m_buf_workqueue = alloc_workqueue("xfs-buf/%s",
+ XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM),
+ 1, mp->m_super->s_id);
+ if (!mp->m_buf_workqueue)
+ goto out;
+
+ mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",
+ XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM),
+ 0, mp->m_super->s_id);
+ if (!mp->m_unwritten_workqueue)
+ goto out_destroy_buf;
+
+ mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s",
+ XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM),
+ 0, mp->m_super->s_id);
+ if (!mp->m_reclaim_workqueue)
+ goto out_destroy_unwritten;
+
+ mp->m_blockgc_wq = alloc_workqueue("xfs-blockgc/%s",
+ XFS_WQFLAGS(WQ_UNBOUND | WQ_FREEZABLE | WQ_MEM_RECLAIM),
+ 0, mp->m_super->s_id);
+ if (!mp->m_blockgc_wq)
+ goto out_destroy_reclaim;
+
+ mp->m_inodegc_wq = alloc_workqueue("xfs-inodegc/%s",
+ XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM),
+ 1, mp->m_super->s_id);
+ if (!mp->m_inodegc_wq)
+ goto out_destroy_blockgc;
+
+ mp->m_sync_workqueue = alloc_workqueue("xfs-sync/%s",
+ XFS_WQFLAGS(WQ_FREEZABLE), 0, mp->m_super->s_id);
+ if (!mp->m_sync_workqueue)
+ goto out_destroy_inodegc;
+
+ return 0;
+
+out_destroy_inodegc:
+ destroy_workqueue(mp->m_inodegc_wq);
+out_destroy_blockgc:
+ destroy_workqueue(mp->m_blockgc_wq);
+out_destroy_reclaim:
+ destroy_workqueue(mp->m_reclaim_workqueue);
+out_destroy_unwritten:
+ destroy_workqueue(mp->m_unwritten_workqueue);
+out_destroy_buf:
+ destroy_workqueue(mp->m_buf_workqueue);
+out:
+ return -ENOMEM;
+}
+
+STATIC void
+xfs_destroy_mount_workqueues(
+ struct xfs_mount *mp)
+{
+ destroy_workqueue(mp->m_sync_workqueue);
+ destroy_workqueue(mp->m_blockgc_wq);
+ destroy_workqueue(mp->m_inodegc_wq);
+ destroy_workqueue(mp->m_reclaim_workqueue);
+ destroy_workqueue(mp->m_unwritten_workqueue);
+ destroy_workqueue(mp->m_buf_workqueue);
+}
+
+static void
+xfs_flush_inodes_worker(
+ struct work_struct *work)
+{
+ struct xfs_mount *mp = container_of(work, struct xfs_mount,
+ m_flush_inodes_work);
+ struct super_block *sb = mp->m_super;
+
+ if (down_read_trylock(&sb->s_umount)) {
+ sync_inodes_sb(sb);
+ up_read(&sb->s_umount);
+ }
+}
+
+/*
+ * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK
+ * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting
+ * for IO to complete so that we effectively throttle multiple callers to the
+ * rate at which IO is completing.
+ */
+void
+xfs_flush_inodes(
+ struct xfs_mount *mp)
+{
+ /*
+ * If flush_work() returns true then that means we waited for a flush
+ * which was already in progress. Don't bother running another scan.
+ */
+ if (flush_work(&mp->m_flush_inodes_work))
+ return;
+
+ queue_work(mp->m_sync_workqueue, &mp->m_flush_inodes_work);
+ flush_work(&mp->m_flush_inodes_work);
+}
+
+/* Catch misguided souls that try to use this interface on XFS */
+STATIC struct inode *
+xfs_fs_alloc_inode(
+ struct super_block *sb)
+{
+ BUG();
+ return NULL;
+}
+
+/*
+ * Now that the generic code is guaranteed not to be accessing
+ * the linux inode, we can inactivate and reclaim the inode.
+ */
+STATIC void
+xfs_fs_destroy_inode(
+ struct inode *inode)
+{
+ struct xfs_inode *ip = XFS_I(inode);
+
+ trace_xfs_destroy_inode(ip);
+
+ ASSERT(!rwsem_is_locked(&inode->i_rwsem));
+ XFS_STATS_INC(ip->i_mount, vn_rele);
+ XFS_STATS_INC(ip->i_mount, vn_remove);
+ xfs_inode_mark_reclaimable(ip);
+}
+
+static void
+xfs_fs_dirty_inode(
+ struct inode *inode,
+ int flags)
+{
+ struct xfs_inode *ip = XFS_I(inode);
+ struct xfs_mount *mp = ip->i_mount;
+ struct xfs_trans *tp;
+
+ if (!(inode->i_sb->s_flags & SB_LAZYTIME))
+ return;
+
+ /*
+ * Only do the timestamp update if the inode is dirty (I_DIRTY_SYNC)
+ * and has dirty timestamp (I_DIRTY_TIME). I_DIRTY_TIME can be passed
+ * in flags possibly together with I_DIRTY_SYNC.
+ */
+ if ((flags & ~I_DIRTY_TIME) != I_DIRTY_SYNC || !(flags & I_DIRTY_TIME))
+ return;
+
+ if (xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp))
+ return;
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
+ xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
+ xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
+ xfs_trans_commit(tp);
+}
+
+/*
+ * Slab object creation initialisation for the XFS inode.
+ * This covers only the idempotent fields in the XFS inode;
+ * all other fields need to be initialised on allocation
+ * from the slab. This avoids the need to repeatedly initialise
+ * fields in the xfs inode that left in the initialise state
+ * when freeing the inode.
+ */
+STATIC void
+xfs_fs_inode_init_once(
+ void *inode)
+{
+ struct xfs_inode *ip = inode;
+
+ memset(ip, 0, sizeof(struct xfs_inode));
+
+ /* vfs inode */
+ inode_init_once(VFS_I(ip));
+
+ /* xfs inode */
+ atomic_set(&ip->i_pincount, 0);
+ spin_lock_init(&ip->i_flags_lock);
+
+ mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
+ "xfsino", ip->i_ino);
+}
+
+/*
+ * We do an unlocked check for XFS_IDONTCACHE here because we are already
+ * serialised against cache hits here via the inode->i_lock and igrab() in
+ * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be
+ * racing with us, and it avoids needing to grab a spinlock here for every inode
+ * we drop the final reference on.
+ */
+STATIC int
+xfs_fs_drop_inode(
+ struct inode *inode)
+{
+ struct xfs_inode *ip = XFS_I(inode);
+
+ /*
+ * If this unlinked inode is in the middle of recovery, don't
+ * drop the inode just yet; log recovery will take care of
+ * that. See the comment for this inode flag.
+ */
+ if (ip->i_flags & XFS_IRECOVERY) {
+ ASSERT(xlog_recovery_needed(ip->i_mount->m_log));
+ return 0;
+ }
+
+ return generic_drop_inode(inode);
+}
+
+static void
+xfs_mount_free(
+ struct xfs_mount *mp)
+{
+ kfree(mp->m_rtname);
+ kfree(mp->m_logname);
+ kmem_free(mp);
+}
+
+STATIC int
+xfs_fs_sync_fs(
+ struct super_block *sb,
+ int wait)
+{
+ struct xfs_mount *mp = XFS_M(sb);
+ int error;
+
+ trace_xfs_fs_sync_fs(mp, __return_address);
+
+ /*
+ * Doing anything during the async pass would be counterproductive.
+ */
+ if (!wait)
+ return 0;
+
+ error = xfs_log_force(mp, XFS_LOG_SYNC);
+ if (error)
+ return error;
+
+ if (laptop_mode) {
+ /*
+ * The disk must be active because we're syncing.
+ * We schedule log work now (now that the disk is
+ * active) instead of later (when it might not be).
+ */
+ flush_delayed_work(&mp->m_log->l_work);
+ }
+
+ /*
+ * If we are called with page faults frozen out, it means we are about
+ * to freeze the transaction subsystem. Take the opportunity to shut
+ * down inodegc because once SB_FREEZE_FS is set it's too late to
+ * prevent inactivation races with freeze. The fs doesn't get called
+ * again by the freezing process until after SB_FREEZE_FS has been set,
+ * so it's now or never. Same logic applies to speculative allocation
+ * garbage collection.
+ *
+ * We don't care if this is a normal syncfs call that does this or
+ * freeze that does this - we can run this multiple times without issue
+ * and we won't race with a restart because a restart can only occur
+ * when the state is either SB_FREEZE_FS or SB_FREEZE_COMPLETE.
+ */
+ if (sb->s_writers.frozen == SB_FREEZE_PAGEFAULT) {
+ xfs_inodegc_stop(mp);
+ xfs_blockgc_stop(mp);
+ }
+
+ return 0;
+}
+
+STATIC int
+xfs_fs_statfs(
+ struct dentry *dentry,
+ struct kstatfs *statp)
+{
+ struct xfs_mount *mp = XFS_M(dentry->d_sb);
+ xfs_sb_t *sbp = &mp->m_sb;
+ struct xfs_inode *ip = XFS_I(d_inode(dentry));
+ uint64_t fakeinos, id;
+ uint64_t icount;
+ uint64_t ifree;
+ uint64_t fdblocks;
+ xfs_extlen_t lsize;
+ int64_t ffree;
+
+ /*
+ * Expedite background inodegc but don't wait. We do not want to block
+ * here waiting hours for a billion extent file to be truncated.
+ */
+ xfs_inodegc_push(mp);
+
+ statp->f_type = XFS_SUPER_MAGIC;
+ statp->f_namelen = MAXNAMELEN - 1;
+
+ id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
+ statp->f_fsid = u64_to_fsid(id);
+
+ icount = percpu_counter_sum(&mp->m_icount);
+ ifree = percpu_counter_sum(&mp->m_ifree);
+ fdblocks = percpu_counter_sum(&mp->m_fdblocks);
+
+ spin_lock(&mp->m_sb_lock);
+ statp->f_bsize = sbp->sb_blocksize;
+ lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
+ statp->f_blocks = sbp->sb_dblocks - lsize;
+ spin_unlock(&mp->m_sb_lock);
+
+ /* make sure statp->f_bfree does not underflow */
+ statp->f_bfree = max_t(int64_t, 0,
+ fdblocks - xfs_fdblocks_unavailable(mp));
+ statp->f_bavail = statp->f_bfree;
+
+ fakeinos = XFS_FSB_TO_INO(mp, statp->f_bfree);
+ statp->f_files = min(icount + fakeinos, (uint64_t)XFS_MAXINUMBER);
+ if (M_IGEO(mp)->maxicount)
+ statp->f_files = min_t(typeof(statp->f_files),
+ statp->f_files,
+ M_IGEO(mp)->maxicount);
+
+ /* If sb_icount overshot maxicount, report actual allocation */
+ statp->f_files = max_t(typeof(statp->f_files),
+ statp->f_files,
+ sbp->sb_icount);
+
+ /* make sure statp->f_ffree does not underflow */
+ ffree = statp->f_files - (icount - ifree);
+ statp->f_ffree = max_t(int64_t, ffree, 0);
+
+
+ if ((ip->i_diflags & XFS_DIFLAG_PROJINHERIT) &&
+ ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) ==
+ (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))
+ xfs_qm_statvfs(ip, statp);
+
+ if (XFS_IS_REALTIME_MOUNT(mp) &&
+ (ip->i_diflags & (XFS_DIFLAG_RTINHERIT | XFS_DIFLAG_REALTIME))) {
+ s64 freertx;
+
+ statp->f_blocks = sbp->sb_rblocks;
+ freertx = percpu_counter_sum_positive(&mp->m_frextents);
+ statp->f_bavail = statp->f_bfree = freertx * sbp->sb_rextsize;
+ }
+
+ return 0;
+}
+
+STATIC void
+xfs_save_resvblks(struct xfs_mount *mp)
+{
+ uint64_t resblks = 0;
+
+ mp->m_resblks_save = mp->m_resblks;
+ xfs_reserve_blocks(mp, &resblks, NULL);
+}
+
+STATIC void
+xfs_restore_resvblks(struct xfs_mount *mp)
+{
+ uint64_t resblks;
+
+ if (mp->m_resblks_save) {
+ resblks = mp->m_resblks_save;
+ mp->m_resblks_save = 0;
+ } else
+ resblks = xfs_default_resblks(mp);
+
+ xfs_reserve_blocks(mp, &resblks, NULL);
+}
+
+/*
+ * Second stage of a freeze. The data is already frozen so we only
+ * need to take care of the metadata. Once that's done sync the superblock
+ * to the log to dirty it in case of a crash while frozen. This ensures that we
+ * will recover the unlinked inode lists on the next mount.
+ */
+STATIC int
+xfs_fs_freeze(
+ struct super_block *sb)
+{
+ struct xfs_mount *mp = XFS_M(sb);
+ unsigned int flags;
+ int ret;
+
+ /*
+ * The filesystem is now frozen far enough that memory reclaim
+ * cannot safely operate on the filesystem. Hence we need to
+ * set a GFP_NOFS context here to avoid recursion deadlocks.
+ */
+ flags = memalloc_nofs_save();
+ xfs_save_resvblks(mp);
+ ret = xfs_log_quiesce(mp);
+ memalloc_nofs_restore(flags);
+
+ /*
+ * For read-write filesystems, we need to restart the inodegc on error
+ * because we stopped it at SB_FREEZE_PAGEFAULT level and a thaw is not
+ * going to be run to restart it now. We are at SB_FREEZE_FS level
+ * here, so we can restart safely without racing with a stop in
+ * xfs_fs_sync_fs().
+ */
+ if (ret && !xfs_is_readonly(mp)) {
+ xfs_blockgc_start(mp);
+ xfs_inodegc_start(mp);
+ }
+
+ return ret;
+}
+
+STATIC int
+xfs_fs_unfreeze(
+ struct super_block *sb)
+{
+ struct xfs_mount *mp = XFS_M(sb);
+
+ xfs_restore_resvblks(mp);
+ xfs_log_work_queue(mp);
+
+ /*
+ * Don't reactivate the inodegc worker on a readonly filesystem because
+ * inodes are sent directly to reclaim. Don't reactivate the blockgc
+ * worker because there are no speculative preallocations on a readonly
+ * filesystem.
+ */
+ if (!xfs_is_readonly(mp)) {
+ xfs_blockgc_start(mp);
+ xfs_inodegc_start(mp);
+ }
+
+ 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 *mp)
+{
+ /* Fail a mount where the logbuf is smaller than the log stripe */
+ if (xfs_has_logv2(mp)) {
+ if (mp->m_logbsize <= 0 &&
+ mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
+ mp->m_logbsize = mp->m_sb.sb_logsunit;
+ } else if (mp->m_logbsize > 0 &&
+ mp->m_logbsize < mp->m_sb.sb_logsunit) {
+ xfs_warn(mp,
+ "logbuf size must be greater than or equal to log stripe size");
+ return -EINVAL;
+ }
+ } else {
+ /* Fail a mount if the logbuf is larger than 32K */
+ if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
+ xfs_warn(mp,
+ "logbuf size for version 1 logs must be 16K or 32K");
+ return -EINVAL;
+ }
+ }
+
+ /*
+ * V5 filesystems always use attr2 format for attributes.
+ */
+ if (xfs_has_crc(mp) && xfs_has_noattr2(mp)) {
+ xfs_warn(mp, "Cannot mount a V5 filesystem as noattr2. "
+ "attr2 is always enabled for V5 filesystems.");
+ return -EINVAL;
+ }
+
+ /*
+ * prohibit r/w mounts of read-only filesystems
+ */
+ if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !xfs_is_readonly(mp)) {
+ xfs_warn(mp,
+ "cannot mount a read-only filesystem as read-write");
+ return -EROFS;
+ }
+
+ if ((mp->m_qflags & XFS_GQUOTA_ACCT) &&
+ (mp->m_qflags & XFS_PQUOTA_ACCT) &&
+ !xfs_has_pquotino(mp)) {
+ xfs_warn(mp,
+ "Super block does not support project and group quota together");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int
+xfs_init_percpu_counters(
+ struct xfs_mount *mp)
+{
+ int error;
+
+ error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL);
+ if (error)
+ return -ENOMEM;
+
+ error = percpu_counter_init(&mp->m_ifree, 0, GFP_KERNEL);
+ if (error)
+ goto free_icount;
+
+ error = percpu_counter_init(&mp->m_fdblocks, 0, GFP_KERNEL);
+ if (error)
+ goto free_ifree;
+
+ error = percpu_counter_init(&mp->m_delalloc_blks, 0, GFP_KERNEL);
+ if (error)
+ goto free_fdblocks;
+
+ error = percpu_counter_init(&mp->m_frextents, 0, GFP_KERNEL);
+ if (error)
+ goto free_delalloc;
+
+ return 0;
+
+free_delalloc:
+ percpu_counter_destroy(&mp->m_delalloc_blks);
+free_fdblocks:
+ percpu_counter_destroy(&mp->m_fdblocks);
+free_ifree:
+ percpu_counter_destroy(&mp->m_ifree);
+free_icount:
+ percpu_counter_destroy(&mp->m_icount);
+ return -ENOMEM;
+}
+
+void
+xfs_reinit_percpu_counters(
+ struct xfs_mount *mp)
+{
+ percpu_counter_set(&mp->m_icount, mp->m_sb.sb_icount);
+ percpu_counter_set(&mp->m_ifree, mp->m_sb.sb_ifree);
+ percpu_counter_set(&mp->m_fdblocks, mp->m_sb.sb_fdblocks);
+ percpu_counter_set(&mp->m_frextents, mp->m_sb.sb_frextents);
+}
+
+static void
+xfs_destroy_percpu_counters(
+ struct xfs_mount *mp)
+{
+ percpu_counter_destroy(&mp->m_icount);
+ percpu_counter_destroy(&mp->m_ifree);
+ percpu_counter_destroy(&mp->m_fdblocks);
+ ASSERT(xfs_is_shutdown(mp) ||
+ percpu_counter_sum(&mp->m_delalloc_blks) == 0);
+ percpu_counter_destroy(&mp->m_delalloc_blks);
+ percpu_counter_destroy(&mp->m_frextents);
+}
+
+static int
+xfs_inodegc_init_percpu(
+ struct xfs_mount *mp)
+{
+ struct xfs_inodegc *gc;
+ int cpu;
+
+ mp->m_inodegc = alloc_percpu(struct xfs_inodegc);
+ if (!mp->m_inodegc)
+ return -ENOMEM;
+
+ for_each_possible_cpu(cpu) {
+ gc = per_cpu_ptr(mp->m_inodegc, cpu);
+#if defined(DEBUG) || defined(XFS_WARN)
+ gc->cpu = cpu;
+#endif
+ init_llist_head(&gc->list);
+ gc->items = 0;
+ INIT_DELAYED_WORK(&gc->work, xfs_inodegc_worker);
+ }
+ return 0;
+}
+
+static void
+xfs_inodegc_free_percpu(
+ struct xfs_mount *mp)
+{
+ if (!mp->m_inodegc)
+ return;
+ free_percpu(mp->m_inodegc);
+}
+
+static void
+xfs_fs_put_super(
+ struct super_block *sb)
+{
+ struct xfs_mount *mp = XFS_M(sb);
+
+ /* if ->fill_super failed, we have no mount to tear down */
+ if (!sb->s_fs_info)
+ return;
+
+ xfs_notice(mp, "Unmounting Filesystem");
+ xfs_filestream_unmount(mp);
+ xfs_unmountfs(mp);
+
+ xfs_freesb(mp);
+ free_percpu(mp->m_stats.xs_stats);
+ xfs_mount_list_del(mp);
+ xfs_inodegc_free_percpu(mp);
+ xfs_destroy_percpu_counters(mp);
+ xfs_destroy_mount_workqueues(mp);
+ xfs_close_devices(mp);
+
+ sb->s_fs_info = NULL;
+ xfs_mount_free(mp);
+}
+
+static long
+xfs_fs_nr_cached_objects(
+ struct super_block *sb,
+ struct shrink_control *sc)
+{
+ /* Paranoia: catch incorrect calls during mount setup or teardown */
+ if (WARN_ON_ONCE(!sb->s_fs_info))
+ return 0;
+ return xfs_reclaim_inodes_count(XFS_M(sb));
+}
+
+static long
+xfs_fs_free_cached_objects(
+ struct super_block *sb,
+ struct shrink_control *sc)
+{
+ return xfs_reclaim_inodes_nr(XFS_M(sb), sc->nr_to_scan);
+}
+
+static const struct super_operations xfs_super_operations = {
+ .alloc_inode = xfs_fs_alloc_inode,
+ .destroy_inode = xfs_fs_destroy_inode,
+ .dirty_inode = xfs_fs_dirty_inode,
+ .drop_inode = xfs_fs_drop_inode,
+ .put_super = xfs_fs_put_super,
+ .sync_fs = xfs_fs_sync_fs,
+ .freeze_fs = xfs_fs_freeze,
+ .unfreeze_fs = xfs_fs_unfreeze,
+ .statfs = xfs_fs_statfs,
+ .show_options = xfs_fs_show_options,
+ .nr_cached_objects = xfs_fs_nr_cached_objects,
+ .free_cached_objects = xfs_fs_free_cached_objects,
+};
+
+static int
+suffix_kstrtoint(
+ const char *s,
+ unsigned int base,
+ int *res)
+{
+ int last, shift_left_factor = 0, _res;
+ char *value;
+ int ret = 0;
+
+ value = kstrdup(s, GFP_KERNEL);
+ if (!value)
+ return -ENOMEM;
+
+ 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';
+ }
+
+ if (kstrtoint(value, base, &_res))
+ ret = -EINVAL;
+ kfree(value);
+ *res = _res << shift_left_factor;
+ return ret;
+}
+
+static inline void
+xfs_fs_warn_deprecated(
+ struct fs_context *fc,
+ struct fs_parameter *param,
+ uint64_t flag,
+ bool value)
+{
+ /* Don't print the warning if reconfiguring and current mount point
+ * already had the flag set
+ */
+ if ((fc->purpose & FS_CONTEXT_FOR_RECONFIGURE) &&
+ !!(XFS_M(fc->root->d_sb)->m_features & flag) == value)
+ return;
+ xfs_warn(fc->s_fs_info, "%s mount option is deprecated.", param->key);
+}
+
+/*
+ * Set mount state from a mount option.
+ *
+ * NOTE: mp->m_super is NULL here!
+ */
+static int
+xfs_fs_parse_param(
+ struct fs_context *fc,
+ struct fs_parameter *param)
+{
+ struct xfs_mount *parsing_mp = fc->s_fs_info;
+ struct fs_parse_result result;
+ int size = 0;
+ int opt;
+
+ opt = fs_parse(fc, xfs_fs_parameters, param, &result);
+ if (opt < 0)
+ return opt;
+
+ switch (opt) {
+ case Opt_logbufs:
+ parsing_mp->m_logbufs = result.uint_32;
+ return 0;
+ case Opt_logbsize:
+ if (suffix_kstrtoint(param->string, 10, &parsing_mp->m_logbsize))
+ return -EINVAL;
+ return 0;
+ case Opt_logdev:
+ kfree(parsing_mp->m_logname);
+ parsing_mp->m_logname = kstrdup(param->string, GFP_KERNEL);
+ if (!parsing_mp->m_logname)
+ return -ENOMEM;
+ return 0;
+ case Opt_rtdev:
+ kfree(parsing_mp->m_rtname);
+ parsing_mp->m_rtname = kstrdup(param->string, GFP_KERNEL);
+ if (!parsing_mp->m_rtname)
+ return -ENOMEM;
+ return 0;
+ case Opt_allocsize:
+ if (suffix_kstrtoint(param->string, 10, &size))
+ return -EINVAL;
+ parsing_mp->m_allocsize_log = ffs(size) - 1;
+ parsing_mp->m_features |= XFS_FEAT_ALLOCSIZE;
+ return 0;
+ case Opt_grpid:
+ case Opt_bsdgroups:
+ parsing_mp->m_features |= XFS_FEAT_GRPID;
+ return 0;
+ case Opt_nogrpid:
+ case Opt_sysvgroups:
+ parsing_mp->m_features &= ~XFS_FEAT_GRPID;
+ return 0;
+ case Opt_wsync:
+ parsing_mp->m_features |= XFS_FEAT_WSYNC;
+ return 0;
+ case Opt_norecovery:
+ parsing_mp->m_features |= XFS_FEAT_NORECOVERY;
+ return 0;
+ case Opt_noalign:
+ parsing_mp->m_features |= XFS_FEAT_NOALIGN;
+ return 0;
+ case Opt_swalloc:
+ parsing_mp->m_features |= XFS_FEAT_SWALLOC;
+ return 0;
+ case Opt_sunit:
+ parsing_mp->m_dalign = result.uint_32;
+ return 0;
+ case Opt_swidth:
+ parsing_mp->m_swidth = result.uint_32;
+ return 0;
+ case Opt_inode32:
+ parsing_mp->m_features |= XFS_FEAT_SMALL_INUMS;
+ return 0;
+ case Opt_inode64:
+ parsing_mp->m_features &= ~XFS_FEAT_SMALL_INUMS;
+ return 0;
+ case Opt_nouuid:
+ parsing_mp->m_features |= XFS_FEAT_NOUUID;
+ return 0;
+ case Opt_largeio:
+ parsing_mp->m_features |= XFS_FEAT_LARGE_IOSIZE;
+ return 0;
+ case Opt_nolargeio:
+ parsing_mp->m_features &= ~XFS_FEAT_LARGE_IOSIZE;
+ return 0;
+ case Opt_filestreams:
+ parsing_mp->m_features |= XFS_FEAT_FILESTREAMS;
+ return 0;
+ case Opt_noquota:
+ parsing_mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
+ parsing_mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
+ return 0;
+ case Opt_quota:
+ case Opt_uquota:
+ case Opt_usrquota:
+ parsing_mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ENFD);
+ return 0;
+ case Opt_qnoenforce:
+ case Opt_uqnoenforce:
+ parsing_mp->m_qflags |= XFS_UQUOTA_ACCT;
+ parsing_mp->m_qflags &= ~XFS_UQUOTA_ENFD;
+ return 0;
+ case Opt_pquota:
+ case Opt_prjquota:
+ parsing_mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ENFD);
+ return 0;
+ case Opt_pqnoenforce:
+ parsing_mp->m_qflags |= XFS_PQUOTA_ACCT;
+ parsing_mp->m_qflags &= ~XFS_PQUOTA_ENFD;
+ return 0;
+ case Opt_gquota:
+ case Opt_grpquota:
+ parsing_mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ENFD);
+ return 0;
+ case Opt_gqnoenforce:
+ parsing_mp->m_qflags |= XFS_GQUOTA_ACCT;
+ parsing_mp->m_qflags &= ~XFS_GQUOTA_ENFD;
+ return 0;
+ case Opt_discard:
+ parsing_mp->m_features |= XFS_FEAT_DISCARD;
+ return 0;
+ case Opt_nodiscard:
+ parsing_mp->m_features &= ~XFS_FEAT_DISCARD;
+ return 0;
+#ifdef CONFIG_FS_DAX
+ case Opt_dax:
+ xfs_mount_set_dax_mode(parsing_mp, XFS_DAX_ALWAYS);
+ return 0;
+ case Opt_dax_enum:
+ xfs_mount_set_dax_mode(parsing_mp, result.uint_32);
+ return 0;
+#endif
+ /* Following mount options will be removed in September 2025 */
+ case Opt_ikeep:
+ xfs_fs_warn_deprecated(fc, param, XFS_FEAT_IKEEP, true);
+ parsing_mp->m_features |= XFS_FEAT_IKEEP;
+ return 0;
+ case Opt_noikeep:
+ xfs_fs_warn_deprecated(fc, param, XFS_FEAT_IKEEP, false);
+ parsing_mp->m_features &= ~XFS_FEAT_IKEEP;
+ return 0;
+ case Opt_attr2:
+ xfs_fs_warn_deprecated(fc, param, XFS_FEAT_ATTR2, true);
+ parsing_mp->m_features |= XFS_FEAT_ATTR2;
+ return 0;
+ case Opt_noattr2:
+ xfs_fs_warn_deprecated(fc, param, XFS_FEAT_NOATTR2, true);
+ parsing_mp->m_features |= XFS_FEAT_NOATTR2;
+ return 0;
+ default:
+ xfs_warn(parsing_mp, "unknown mount option [%s].", param->key);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int
+xfs_fs_validate_params(
+ struct xfs_mount *mp)
+{
+ /* No recovery flag requires a read-only mount */
+ if (xfs_has_norecovery(mp) && !xfs_is_readonly(mp)) {
+ xfs_warn(mp, "no-recovery mounts must be read-only.");
+ return -EINVAL;
+ }
+
+ /*
+ * We have not read the superblock at this point, so only the attr2
+ * mount option can set the attr2 feature by this stage.
+ */
+ if (xfs_has_attr2(mp) && xfs_has_noattr2(mp)) {
+ xfs_warn(mp, "attr2 and noattr2 cannot both be specified.");
+ return -EINVAL;
+ }
+
+
+ if (xfs_has_noalign(mp) && (mp->m_dalign || mp->m_swidth)) {
+ xfs_warn(mp,
+ "sunit and swidth options incompatible with the noalign option");
+ return -EINVAL;
+ }
+
+ if (!IS_ENABLED(CONFIG_XFS_QUOTA) && mp->m_qflags != 0) {
+ xfs_warn(mp, "quota support not available in this kernel.");
+ return -EINVAL;
+ }
+
+ if ((mp->m_dalign && !mp->m_swidth) ||
+ (!mp->m_dalign && mp->m_swidth)) {
+ xfs_warn(mp, "sunit and swidth must be specified together");
+ return -EINVAL;
+ }
+
+ if (mp->m_dalign && (mp->m_swidth % mp->m_dalign != 0)) {
+ xfs_warn(mp,
+ "stripe width (%d) must be a multiple of the stripe unit (%d)",
+ mp->m_swidth, mp->m_dalign);
+ return -EINVAL;
+ }
+
+ if (mp->m_logbufs != -1 &&
+ mp->m_logbufs != 0 &&
+ (mp->m_logbufs < XLOG_MIN_ICLOGS ||
+ mp->m_logbufs > XLOG_MAX_ICLOGS)) {
+ xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
+ mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
+ return -EINVAL;
+ }
+
+ if (mp->m_logbsize != -1 &&
+ mp->m_logbsize != 0 &&
+ (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
+ mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
+ !is_power_of_2(mp->m_logbsize))) {
+ xfs_warn(mp,
+ "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
+ mp->m_logbsize);
+ return -EINVAL;
+ }
+
+ if (xfs_has_allocsize(mp) &&
+ (mp->m_allocsize_log > XFS_MAX_IO_LOG ||
+ mp->m_allocsize_log < XFS_MIN_IO_LOG)) {
+ xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
+ mp->m_allocsize_log, XFS_MIN_IO_LOG, XFS_MAX_IO_LOG);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int
+xfs_fs_fill_super(
+ struct super_block *sb,
+ struct fs_context *fc)
+{
+ struct xfs_mount *mp = sb->s_fs_info;
+ struct inode *root;
+ int flags = 0, error;
+
+ mp->m_super = sb;
+
+ /*
+ * Copy VFS mount flags from the context now that all parameter parsing
+ * is guaranteed to have been completed by either the old mount API or
+ * the newer fsopen/fsconfig API.
+ */
+ if (fc->sb_flags & SB_RDONLY)
+ set_bit(XFS_OPSTATE_READONLY, &mp->m_opstate);
+ if (fc->sb_flags & SB_DIRSYNC)
+ mp->m_features |= XFS_FEAT_DIRSYNC;
+ if (fc->sb_flags & SB_SYNCHRONOUS)
+ mp->m_features |= XFS_FEAT_WSYNC;
+
+ error = xfs_fs_validate_params(mp);
+ if (error)
+ goto out_free_names;
+
+ sb_min_blocksize(sb, BBSIZE);
+ sb->s_xattr = xfs_xattr_handlers;
+ sb->s_export_op = &xfs_export_operations;
+#ifdef CONFIG_XFS_QUOTA
+ sb->s_qcop = &xfs_quotactl_operations;
+ sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
+#endif
+ sb->s_op = &xfs_super_operations;
+
+ /*
+ * Delay mount work if the debug hook is set. This is debug
+ * instrumention to coordinate simulation of xfs mount failures with
+ * VFS superblock operations
+ */
+ if (xfs_globals.mount_delay) {
+ xfs_notice(mp, "Delaying mount for %d seconds.",
+ xfs_globals.mount_delay);
+ msleep(xfs_globals.mount_delay * 1000);
+ }
+
+ if (fc->sb_flags & SB_SILENT)
+ flags |= XFS_MFSI_QUIET;
+
+ error = xfs_open_devices(mp);
+ if (error)
+ goto out_free_names;
+
+ error = xfs_init_mount_workqueues(mp);
+ if (error)
+ goto out_close_devices;
+
+ error = xfs_init_percpu_counters(mp);
+ if (error)
+ goto out_destroy_workqueues;
+
+ error = xfs_inodegc_init_percpu(mp);
+ if (error)
+ goto out_destroy_counters;
+
+ /*
+ * All percpu data structures requiring cleanup when a cpu goes offline
+ * must be allocated before adding this @mp to the cpu-dead handler's
+ * mount list.
+ */
+ xfs_mount_list_add(mp);
+
+ /* Allocate stats memory before we do operations that might use it */
+ mp->m_stats.xs_stats = alloc_percpu(struct xfsstats);
+ if (!mp->m_stats.xs_stats) {
+ error = -ENOMEM;
+ goto out_destroy_inodegc;
+ }
+
+ error = xfs_readsb(mp, flags);
+ if (error)
+ goto out_free_stats;
+
+ error = xfs_finish_flags(mp);
+ if (error)
+ goto out_free_sb;
+
+ error = xfs_setup_devices(mp);
+ if (error)
+ goto out_free_sb;
+
+ /* V4 support is undergoing deprecation. */
+ if (!xfs_has_crc(mp)) {
+#ifdef CONFIG_XFS_SUPPORT_V4
+ xfs_warn_once(mp,
+ "Deprecated V4 format (crc=0) will not be supported after September 2030.");
+#else
+ xfs_warn(mp,
+ "Deprecated V4 format (crc=0) not supported by kernel.");
+ error = -EINVAL;
+ goto out_free_sb;
+#endif
+ }
+
+ /* Filesystem claims it needs repair, so refuse the mount. */
+ if (xfs_has_needsrepair(mp)) {
+ xfs_warn(mp, "Filesystem needs repair. Please run xfs_repair.");
+ error = -EFSCORRUPTED;
+ goto out_free_sb;
+ }
+
+ /*
+ * Don't touch the filesystem if a user tool thinks it owns the primary
+ * superblock. mkfs doesn't clear the flag from secondary supers, so
+ * we don't check them at all.
+ */
+ if (mp->m_sb.sb_inprogress) {
+ xfs_warn(mp, "Offline file system operation in progress!");
+ error = -EFSCORRUPTED;
+ goto out_free_sb;
+ }
+
+ /*
+ * Until this is fixed only page-sized or smaller data blocks work.
+ */
+ if (mp->m_sb.sb_blocksize > PAGE_SIZE) {
+ xfs_warn(mp,
+ "File system with blocksize %d bytes. "
+ "Only pagesize (%ld) or less will currently work.",
+ mp->m_sb.sb_blocksize, PAGE_SIZE);
+ error = -ENOSYS;
+ goto out_free_sb;
+ }
+
+ /* Ensure this filesystem fits in the page cache limits */
+ if (xfs_sb_validate_fsb_count(&mp->m_sb, mp->m_sb.sb_dblocks) ||
+ xfs_sb_validate_fsb_count(&mp->m_sb, mp->m_sb.sb_rblocks)) {
+ xfs_warn(mp,
+ "file system too large to be mounted on this system.");
+ error = -EFBIG;
+ goto out_free_sb;
+ }
+
+ /*
+ * XFS block mappings use 54 bits to store the logical block offset.
+ * This should suffice to handle the maximum file size that the VFS
+ * supports (currently 2^63 bytes on 64-bit and ULONG_MAX << PAGE_SHIFT
+ * bytes on 32-bit), but as XFS and VFS have gotten the s_maxbytes
+ * calculation wrong on 32-bit kernels in the past, we'll add a WARN_ON
+ * to check this assertion.
+ *
+ * Avoid integer overflow by comparing the maximum bmbt offset to the
+ * maximum pagecache offset in units of fs blocks.
+ */
+ if (!xfs_verify_fileoff(mp, XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE))) {
+ xfs_warn(mp,
+"MAX_LFS_FILESIZE block offset (%llu) exceeds extent map maximum (%llu)!",
+ XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE),
+ XFS_MAX_FILEOFF);
+ error = -EINVAL;
+ goto out_free_sb;
+ }
+
+ error = xfs_filestream_mount(mp);
+ if (error)
+ goto out_free_sb;
+
+ /*
+ * we must configure the block size in the superblock before we run the
+ * full mount process as the mount process can lookup and cache inodes.
+ */
+ sb->s_magic = XFS_SUPER_MAGIC;
+ sb->s_blocksize = mp->m_sb.sb_blocksize;
+ sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
+ sb->s_maxbytes = MAX_LFS_FILESIZE;
+ sb->s_max_links = XFS_MAXLINK;
+ sb->s_time_gran = 1;
+ if (xfs_has_bigtime(mp)) {
+ sb->s_time_min = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MIN);
+ sb->s_time_max = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MAX);
+ } else {
+ sb->s_time_min = XFS_LEGACY_TIME_MIN;
+ sb->s_time_max = XFS_LEGACY_TIME_MAX;
+ }
+ trace_xfs_inode_timestamp_range(mp, sb->s_time_min, sb->s_time_max);
+ sb->s_iflags |= SB_I_CGROUPWB;
+
+ set_posix_acl_flag(sb);
+
+ /* version 5 superblocks support inode version counters. */
+ if (xfs_has_crc(mp))
+ sb->s_flags |= SB_I_VERSION;
+
+ if (xfs_has_dax_always(mp)) {
+ error = xfs_setup_dax_always(mp);
+ if (error)
+ goto out_filestream_unmount;
+ }
+
+ if (xfs_has_discard(mp) && !bdev_max_discard_sectors(sb->s_bdev)) {
+ xfs_warn(mp,
+ "mounting with \"discard\" option, but the device does not support discard");
+ mp->m_features &= ~XFS_FEAT_DISCARD;
+ }
+
+ if (xfs_has_reflink(mp)) {
+ if (mp->m_sb.sb_rblocks) {
+ xfs_alert(mp,
+ "reflink not compatible with realtime device!");
+ error = -EINVAL;
+ goto out_filestream_unmount;
+ }
+
+ if (xfs_globals.always_cow) {
+ xfs_info(mp, "using DEBUG-only always_cow mode.");
+ mp->m_always_cow = true;
+ }
+ }
+
+ if (xfs_has_rmapbt(mp) && mp->m_sb.sb_rblocks) {
+ xfs_alert(mp,
+ "reverse mapping btree not compatible with realtime device!");
+ error = -EINVAL;
+ goto out_filestream_unmount;
+ }
+
+ if (xfs_has_large_extent_counts(mp))
+ xfs_warn(mp,
+ "EXPERIMENTAL Large extent counts feature in use. Use at your own risk!");
+
+ error = xfs_mountfs(mp);
+ if (error)
+ goto out_filestream_unmount;
+
+ root = igrab(VFS_I(mp->m_rootip));
+ if (!root) {
+ error = -ENOENT;
+ goto out_unmount;
+ }
+ sb->s_root = d_make_root(root);
+ if (!sb->s_root) {
+ error = -ENOMEM;
+ goto out_unmount;
+ }
+
+ return 0;
+
+ out_filestream_unmount:
+ xfs_filestream_unmount(mp);
+ out_free_sb:
+ xfs_freesb(mp);
+ out_free_stats:
+ free_percpu(mp->m_stats.xs_stats);
+ out_destroy_inodegc:
+ xfs_mount_list_del(mp);
+ xfs_inodegc_free_percpu(mp);
+ out_destroy_counters:
+ xfs_destroy_percpu_counters(mp);
+ out_destroy_workqueues:
+ xfs_destroy_mount_workqueues(mp);
+ out_close_devices:
+ xfs_close_devices(mp);
+ out_free_names:
+ sb->s_fs_info = NULL;
+ xfs_mount_free(mp);
+ return error;
+
+ out_unmount:
+ xfs_filestream_unmount(mp);
+ xfs_unmountfs(mp);
+ goto out_free_sb;
+}
+
+static int
+xfs_fs_get_tree(
+ struct fs_context *fc)
+{
+ return get_tree_bdev(fc, xfs_fs_fill_super);
+}
+
+static int
+xfs_remount_rw(
+ struct xfs_mount *mp)
+{
+ struct xfs_sb *sbp = &mp->m_sb;
+ int error;
+
+ if (xfs_has_norecovery(mp)) {
+ xfs_warn(mp,
+ "ro->rw transition prohibited on norecovery mount");
+ return -EINVAL;
+ }
+
+ if (xfs_sb_is_v5(sbp) &&
+ xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) {
+ xfs_warn(mp,
+ "ro->rw transition prohibited on unknown (0x%x) ro-compat filesystem",
+ (sbp->sb_features_ro_compat &
+ XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
+ return -EINVAL;
+ }
+
+ clear_bit(XFS_OPSTATE_READONLY, &mp->m_opstate);
+
+ /*
+ * If this is the first remount to writeable state we might have some
+ * superblock changes to update.
+ */
+ if (mp->m_update_sb) {
+ error = xfs_sync_sb(mp, false);
+ if (error) {
+ xfs_warn(mp, "failed to write sb changes");
+ return error;
+ }
+ mp->m_update_sb = false;
+ }
+
+ /*
+ * Fill out the reserve pool if it is empty. Use the stashed value if
+ * it is non-zero, otherwise go with the default.
+ */
+ xfs_restore_resvblks(mp);
+ xfs_log_work_queue(mp);
+ xfs_blockgc_start(mp);
+
+ /* Create the per-AG metadata reservation pool .*/
+ error = xfs_fs_reserve_ag_blocks(mp);
+ if (error && error != -ENOSPC)
+ return error;
+
+ /* Re-enable the background inode inactivation worker. */
+ xfs_inodegc_start(mp);
+
+ return 0;
+}
+
+static int
+xfs_remount_ro(
+ struct xfs_mount *mp)
+{
+ struct xfs_icwalk icw = {
+ .icw_flags = XFS_ICWALK_FLAG_SYNC,
+ };
+ int error;
+
+ /* Flush all the dirty data to disk. */
+ error = sync_filesystem(mp->m_super);
+ if (error)
+ return error;
+
+ /*
+ * Cancel background eofb scanning so it cannot race with the final
+ * log force+buftarg wait and deadlock the remount.
+ */
+ xfs_blockgc_stop(mp);
+
+ /*
+ * Clear out all remaining COW staging extents and speculative post-EOF
+ * preallocations so that we don't leave inodes requiring inactivation
+ * cleanups during reclaim on a read-only mount. We must process every
+ * cached inode, so this requires a synchronous cache scan.
+ */
+ error = xfs_blockgc_free_space(mp, &icw);
+ if (error) {
+ xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
+ return error;
+ }
+
+ /*
+ * Stop the inodegc background worker. xfs_fs_reconfigure already
+ * flushed all pending inodegc work when it sync'd the filesystem.
+ * The VFS holds s_umount, so we know that inodes cannot enter
+ * xfs_fs_destroy_inode during a remount operation. In readonly mode
+ * we send inodes straight to reclaim, so no inodes will be queued.
+ */
+ xfs_inodegc_stop(mp);
+
+ /* Free the per-AG metadata reservation pool. */
+ error = xfs_fs_unreserve_ag_blocks(mp);
+ if (error) {
+ xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
+ return error;
+ }
+
+ /*
+ * Before we sync the metadata, we need to free up the reserve block
+ * pool so that the used block count in the superblock on disk is
+ * correct at the end of the remount. Stash the current* reserve pool
+ * size so that if we get remounted rw, we can return it to the same
+ * size.
+ */
+ xfs_save_resvblks(mp);
+
+ xfs_log_clean(mp);
+ set_bit(XFS_OPSTATE_READONLY, &mp->m_opstate);
+
+ return 0;
+}
+
+/*
+ * Logically we would return an error here to prevent users from believing
+ * they might have changed mount options using remount which can't be changed.
+ *
+ * But unfortunately mount(8) adds all options from mtab and fstab to the mount
+ * arguments in some cases so we can't blindly reject options, but have to
+ * check for each specified option if it actually differs from the currently
+ * set option and only reject it if that's the case.
+ *
+ * Until that is implemented we return success for every remount request, and
+ * silently ignore all options that we can't actually change.
+ */
+static int
+xfs_fs_reconfigure(
+ struct fs_context *fc)
+{
+ struct xfs_mount *mp = XFS_M(fc->root->d_sb);
+ struct xfs_mount *new_mp = fc->s_fs_info;
+ int flags = fc->sb_flags;
+ int error;
+
+ /* version 5 superblocks always support version counters. */
+ if (xfs_has_crc(mp))
+ fc->sb_flags |= SB_I_VERSION;
+
+ error = xfs_fs_validate_params(new_mp);
+ if (error)
+ return error;
+
+ /* inode32 -> inode64 */
+ if (xfs_has_small_inums(mp) && !xfs_has_small_inums(new_mp)) {
+ mp->m_features &= ~XFS_FEAT_SMALL_INUMS;
+ mp->m_maxagi = xfs_set_inode_alloc(mp, mp->m_sb.sb_agcount);
+ }
+
+ /* inode64 -> inode32 */
+ if (!xfs_has_small_inums(mp) && xfs_has_small_inums(new_mp)) {
+ mp->m_features |= XFS_FEAT_SMALL_INUMS;
+ mp->m_maxagi = xfs_set_inode_alloc(mp, mp->m_sb.sb_agcount);
+ }
+
+ /* ro -> rw */
+ if (xfs_is_readonly(mp) && !(flags & SB_RDONLY)) {
+ error = xfs_remount_rw(mp);
+ if (error)
+ return error;
+ }
+
+ /* rw -> ro */
+ if (!xfs_is_readonly(mp) && (flags & SB_RDONLY)) {
+ error = xfs_remount_ro(mp);
+ if (error)
+ return error;
+ }
+
+ return 0;
+}
+
+static void xfs_fs_free(
+ struct fs_context *fc)
+{
+ struct xfs_mount *mp = fc->s_fs_info;
+
+ /*
+ * mp is stored in the fs_context when it is initialized.
+ * mp is transferred to the superblock on a successful mount,
+ * but if an error occurs before the transfer we have to free
+ * it here.
+ */
+ if (mp)
+ xfs_mount_free(mp);
+}
+
+static const struct fs_context_operations xfs_context_ops = {
+ .parse_param = xfs_fs_parse_param,
+ .get_tree = xfs_fs_get_tree,
+ .reconfigure = xfs_fs_reconfigure,
+ .free = xfs_fs_free,
+};
+
+/*
+ * WARNING: do not initialise any parameters in this function that depend on
+ * mount option parsing having already been performed as this can be called from
+ * fsopen() before any parameters have been set.
+ */
+static int xfs_init_fs_context(
+ struct fs_context *fc)
+{
+ struct xfs_mount *mp;
+
+ mp = kmem_alloc(sizeof(struct xfs_mount), KM_ZERO);
+ if (!mp)
+ return -ENOMEM;
+
+ spin_lock_init(&mp->m_sb_lock);
+ spin_lock_init(&mp->m_agirotor_lock);
+ INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC);
+ spin_lock_init(&mp->m_perag_lock);
+ mutex_init(&mp->m_growlock);
+ INIT_WORK(&mp->m_flush_inodes_work, xfs_flush_inodes_worker);
+ INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker);
+ mp->m_kobj.kobject.kset = xfs_kset;
+ /*
+ * We don't create the finobt per-ag space reservation until after log
+ * recovery, so we must set this to true so that an ifree transaction
+ * started during log recovery will not depend on space reservations
+ * for finobt expansion.
+ */
+ mp->m_finobt_nores = true;
+
+ /*
+ * These can be overridden by the mount option parsing.
+ */
+ mp->m_logbufs = -1;
+ mp->m_logbsize = -1;
+ mp->m_allocsize_log = 16; /* 64k */
+
+ fc->s_fs_info = mp;
+ fc->ops = &xfs_context_ops;
+
+ return 0;
+}
+
+static struct file_system_type xfs_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "xfs",
+ .init_fs_context = xfs_init_fs_context,
+ .parameters = xfs_fs_parameters,
+ .kill_sb = kill_block_super,
+ .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
+};
+MODULE_ALIAS_FS("xfs");
+
+STATIC int __init
+xfs_init_caches(void)
+{
+ int error;
+
+ xfs_buf_cache = kmem_cache_create("xfs_buf", sizeof(struct xfs_buf), 0,
+ SLAB_HWCACHE_ALIGN |
+ SLAB_RECLAIM_ACCOUNT |
+ SLAB_MEM_SPREAD,
+ NULL);
+ if (!xfs_buf_cache)
+ goto out;
+
+ xfs_log_ticket_cache = kmem_cache_create("xfs_log_ticket",
+ sizeof(struct xlog_ticket),
+ 0, 0, NULL);
+ if (!xfs_log_ticket_cache)
+ goto out_destroy_buf_cache;
+
+ error = xfs_btree_init_cur_caches();
+ if (error)
+ goto out_destroy_log_ticket_cache;
+
+ error = xfs_defer_init_item_caches();
+ if (error)
+ goto out_destroy_btree_cur_cache;
+
+ xfs_da_state_cache = kmem_cache_create("xfs_da_state",
+ sizeof(struct xfs_da_state),
+ 0, 0, NULL);
+ if (!xfs_da_state_cache)
+ goto out_destroy_defer_item_cache;
+
+ xfs_ifork_cache = kmem_cache_create("xfs_ifork",
+ sizeof(struct xfs_ifork),
+ 0, 0, NULL);
+ if (!xfs_ifork_cache)
+ goto out_destroy_da_state_cache;
+
+ xfs_trans_cache = kmem_cache_create("xfs_trans",
+ sizeof(struct xfs_trans),
+ 0, 0, NULL);
+ if (!xfs_trans_cache)
+ goto out_destroy_ifork_cache;
+
+
+ /*
+ * The size of the cache-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_cache = kmem_cache_create("xfs_buf_item",
+ sizeof(struct xfs_buf_log_item),
+ 0, 0, NULL);
+ if (!xfs_buf_item_cache)
+ goto out_destroy_trans_cache;
+
+ xfs_efd_cache = kmem_cache_create("xfs_efd_item",
+ xfs_efd_log_item_sizeof(XFS_EFD_MAX_FAST_EXTENTS),
+ 0, 0, NULL);
+ if (!xfs_efd_cache)
+ goto out_destroy_buf_item_cache;
+
+ xfs_efi_cache = kmem_cache_create("xfs_efi_item",
+ xfs_efi_log_item_sizeof(XFS_EFI_MAX_FAST_EXTENTS),
+ 0, 0, NULL);
+ if (!xfs_efi_cache)
+ goto out_destroy_efd_cache;
+
+ xfs_inode_cache = kmem_cache_create("xfs_inode",
+ sizeof(struct xfs_inode), 0,
+ (SLAB_HWCACHE_ALIGN |
+ SLAB_RECLAIM_ACCOUNT |
+ SLAB_MEM_SPREAD | SLAB_ACCOUNT),
+ xfs_fs_inode_init_once);
+ if (!xfs_inode_cache)
+ goto out_destroy_efi_cache;
+
+ xfs_ili_cache = kmem_cache_create("xfs_ili",
+ sizeof(struct xfs_inode_log_item), 0,
+ SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD,
+ NULL);
+ if (!xfs_ili_cache)
+ goto out_destroy_inode_cache;
+
+ xfs_icreate_cache = kmem_cache_create("xfs_icr",
+ sizeof(struct xfs_icreate_item),
+ 0, 0, NULL);
+ if (!xfs_icreate_cache)
+ goto out_destroy_ili_cache;
+
+ xfs_rud_cache = kmem_cache_create("xfs_rud_item",
+ sizeof(struct xfs_rud_log_item),
+ 0, 0, NULL);
+ if (!xfs_rud_cache)
+ goto out_destroy_icreate_cache;
+
+ xfs_rui_cache = kmem_cache_create("xfs_rui_item",
+ xfs_rui_log_item_sizeof(XFS_RUI_MAX_FAST_EXTENTS),
+ 0, 0, NULL);
+ if (!xfs_rui_cache)
+ goto out_destroy_rud_cache;
+
+ xfs_cud_cache = kmem_cache_create("xfs_cud_item",
+ sizeof(struct xfs_cud_log_item),
+ 0, 0, NULL);
+ if (!xfs_cud_cache)
+ goto out_destroy_rui_cache;
+
+ xfs_cui_cache = kmem_cache_create("xfs_cui_item",
+ xfs_cui_log_item_sizeof(XFS_CUI_MAX_FAST_EXTENTS),
+ 0, 0, NULL);
+ if (!xfs_cui_cache)
+ goto out_destroy_cud_cache;
+
+ xfs_bud_cache = kmem_cache_create("xfs_bud_item",
+ sizeof(struct xfs_bud_log_item),
+ 0, 0, NULL);
+ if (!xfs_bud_cache)
+ goto out_destroy_cui_cache;
+
+ xfs_bui_cache = kmem_cache_create("xfs_bui_item",
+ xfs_bui_log_item_sizeof(XFS_BUI_MAX_FAST_EXTENTS),
+ 0, 0, NULL);
+ if (!xfs_bui_cache)
+ goto out_destroy_bud_cache;
+
+ xfs_attrd_cache = kmem_cache_create("xfs_attrd_item",
+ sizeof(struct xfs_attrd_log_item),
+ 0, 0, NULL);
+ if (!xfs_attrd_cache)
+ goto out_destroy_bui_cache;
+
+ xfs_attri_cache = kmem_cache_create("xfs_attri_item",
+ sizeof(struct xfs_attri_log_item),
+ 0, 0, NULL);
+ if (!xfs_attri_cache)
+ goto out_destroy_attrd_cache;
+
+ xfs_iunlink_cache = kmem_cache_create("xfs_iul_item",
+ sizeof(struct xfs_iunlink_item),
+ 0, 0, NULL);
+ if (!xfs_iunlink_cache)
+ goto out_destroy_attri_cache;
+
+ return 0;
+
+ out_destroy_attri_cache:
+ kmem_cache_destroy(xfs_attri_cache);
+ out_destroy_attrd_cache:
+ kmem_cache_destroy(xfs_attrd_cache);
+ out_destroy_bui_cache:
+ kmem_cache_destroy(xfs_bui_cache);
+ out_destroy_bud_cache:
+ kmem_cache_destroy(xfs_bud_cache);
+ out_destroy_cui_cache:
+ kmem_cache_destroy(xfs_cui_cache);
+ out_destroy_cud_cache:
+ kmem_cache_destroy(xfs_cud_cache);
+ out_destroy_rui_cache:
+ kmem_cache_destroy(xfs_rui_cache);
+ out_destroy_rud_cache:
+ kmem_cache_destroy(xfs_rud_cache);
+ out_destroy_icreate_cache:
+ kmem_cache_destroy(xfs_icreate_cache);
+ out_destroy_ili_cache:
+ kmem_cache_destroy(xfs_ili_cache);
+ out_destroy_inode_cache:
+ kmem_cache_destroy(xfs_inode_cache);
+ out_destroy_efi_cache:
+ kmem_cache_destroy(xfs_efi_cache);
+ out_destroy_efd_cache:
+ kmem_cache_destroy(xfs_efd_cache);
+ out_destroy_buf_item_cache:
+ kmem_cache_destroy(xfs_buf_item_cache);
+ out_destroy_trans_cache:
+ kmem_cache_destroy(xfs_trans_cache);
+ out_destroy_ifork_cache:
+ kmem_cache_destroy(xfs_ifork_cache);
+ out_destroy_da_state_cache:
+ kmem_cache_destroy(xfs_da_state_cache);
+ out_destroy_defer_item_cache:
+ xfs_defer_destroy_item_caches();
+ out_destroy_btree_cur_cache:
+ xfs_btree_destroy_cur_caches();
+ out_destroy_log_ticket_cache:
+ kmem_cache_destroy(xfs_log_ticket_cache);
+ out_destroy_buf_cache:
+ kmem_cache_destroy(xfs_buf_cache);
+ out:
+ return -ENOMEM;
+}
+
+STATIC void
+xfs_destroy_caches(void)
+{
+ /*
+ * Make sure all delayed rcu free are flushed before we
+ * destroy caches.
+ */
+ rcu_barrier();
+ kmem_cache_destroy(xfs_iunlink_cache);
+ kmem_cache_destroy(xfs_attri_cache);
+ kmem_cache_destroy(xfs_attrd_cache);
+ kmem_cache_destroy(xfs_bui_cache);
+ kmem_cache_destroy(xfs_bud_cache);
+ kmem_cache_destroy(xfs_cui_cache);
+ kmem_cache_destroy(xfs_cud_cache);
+ kmem_cache_destroy(xfs_rui_cache);
+ kmem_cache_destroy(xfs_rud_cache);
+ kmem_cache_destroy(xfs_icreate_cache);
+ kmem_cache_destroy(xfs_ili_cache);
+ kmem_cache_destroy(xfs_inode_cache);
+ kmem_cache_destroy(xfs_efi_cache);
+ kmem_cache_destroy(xfs_efd_cache);
+ kmem_cache_destroy(xfs_buf_item_cache);
+ kmem_cache_destroy(xfs_trans_cache);
+ kmem_cache_destroy(xfs_ifork_cache);
+ kmem_cache_destroy(xfs_da_state_cache);
+ xfs_defer_destroy_item_caches();
+ xfs_btree_destroy_cur_caches();
+ kmem_cache_destroy(xfs_log_ticket_cache);
+ kmem_cache_destroy(xfs_buf_cache);
+}
+
+STATIC int __init
+xfs_init_workqueues(void)
+{
+ /*
+ * The allocation workqueue can be used in memory reclaim situations
+ * (writepage path), and parallelism is only limited by the number of
+ * AGs in all the filesystems mounted. Hence use the default large
+ * max_active value for this workqueue.
+ */
+ xfs_alloc_wq = alloc_workqueue("xfsalloc",
+ XFS_WQFLAGS(WQ_MEM_RECLAIM | WQ_FREEZABLE), 0);
+ if (!xfs_alloc_wq)
+ return -ENOMEM;
+
+ xfs_discard_wq = alloc_workqueue("xfsdiscard", XFS_WQFLAGS(WQ_UNBOUND),
+ 0);
+ if (!xfs_discard_wq)
+ goto out_free_alloc_wq;
+
+ return 0;
+out_free_alloc_wq:
+ destroy_workqueue(xfs_alloc_wq);
+ return -ENOMEM;
+}
+
+STATIC void
+xfs_destroy_workqueues(void)
+{
+ destroy_workqueue(xfs_discard_wq);
+ destroy_workqueue(xfs_alloc_wq);
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+static int
+xfs_cpu_dead(
+ unsigned int cpu)
+{
+ struct xfs_mount *mp, *n;
+
+ spin_lock(&xfs_mount_list_lock);
+ list_for_each_entry_safe(mp, n, &xfs_mount_list, m_mount_list) {
+ spin_unlock(&xfs_mount_list_lock);
+ xfs_inodegc_cpu_dead(mp, cpu);
+ xlog_cil_pcp_dead(mp->m_log, cpu);
+ spin_lock(&xfs_mount_list_lock);
+ }
+ spin_unlock(&xfs_mount_list_lock);
+ return 0;
+}
+
+static int __init
+xfs_cpu_hotplug_init(void)
+{
+ int error;
+
+ error = cpuhp_setup_state_nocalls(CPUHP_XFS_DEAD, "xfs:dead", NULL,
+ xfs_cpu_dead);
+ if (error < 0)
+ xfs_alert(NULL,
+"Failed to initialise CPU hotplug, error %d. XFS is non-functional.",
+ error);
+ return error;
+}
+
+static void
+xfs_cpu_hotplug_destroy(void)
+{
+ cpuhp_remove_state_nocalls(CPUHP_XFS_DEAD);
+}
+
+#else /* !CONFIG_HOTPLUG_CPU */
+static inline int xfs_cpu_hotplug_init(void) { return 0; }
+static inline void xfs_cpu_hotplug_destroy(void) {}
+#endif
+
+STATIC int __init
+init_xfs_fs(void)
+{
+ int error;
+
+ xfs_check_ondisk_structs();
+
+ printk(KERN_INFO XFS_VERSION_STRING " with "
+ XFS_BUILD_OPTIONS " enabled\n");
+
+ xfs_dir_startup();
+
+ error = xfs_cpu_hotplug_init();
+ if (error)
+ goto out;
+
+ error = xfs_init_caches();
+ if (error)
+ goto out_destroy_hp;
+
+ error = xfs_init_workqueues();
+ if (error)
+ goto out_destroy_caches;
+
+ error = xfs_mru_cache_init();
+ if (error)
+ goto out_destroy_wq;
+
+ error = xfs_init_procfs();
+ if (error)
+ goto out_mru_cache_uninit;
+
+ error = xfs_sysctl_register();
+ if (error)
+ goto out_cleanup_procfs;
+
+ xfs_kset = kset_create_and_add("xfs", NULL, fs_kobj);
+ if (!xfs_kset) {
+ error = -ENOMEM;
+ goto out_sysctl_unregister;
+ }
+
+ xfsstats.xs_kobj.kobject.kset = xfs_kset;
+
+ xfsstats.xs_stats = alloc_percpu(struct xfsstats);
+ if (!xfsstats.xs_stats) {
+ error = -ENOMEM;
+ goto out_kset_unregister;
+ }
+
+ error = xfs_sysfs_init(&xfsstats.xs_kobj, &xfs_stats_ktype, NULL,
+ "stats");
+ if (error)
+ goto out_free_stats;
+
+#ifdef DEBUG
+ xfs_dbg_kobj.kobject.kset = xfs_kset;
+ error = xfs_sysfs_init(&xfs_dbg_kobj, &xfs_dbg_ktype, NULL, "debug");
+ if (error)
+ goto out_remove_stats_kobj;
+#endif
+
+ error = xfs_qm_init();
+ if (error)
+ goto out_remove_dbg_kobj;
+
+ error = register_filesystem(&xfs_fs_type);
+ if (error)
+ goto out_qm_exit;
+ return 0;
+
+ out_qm_exit:
+ xfs_qm_exit();
+ out_remove_dbg_kobj:
+#ifdef DEBUG
+ xfs_sysfs_del(&xfs_dbg_kobj);
+ out_remove_stats_kobj:
+#endif
+ xfs_sysfs_del(&xfsstats.xs_kobj);
+ out_free_stats:
+ free_percpu(xfsstats.xs_stats);
+ out_kset_unregister:
+ kset_unregister(xfs_kset);
+ out_sysctl_unregister:
+ xfs_sysctl_unregister();
+ out_cleanup_procfs:
+ xfs_cleanup_procfs();
+ out_mru_cache_uninit:
+ xfs_mru_cache_uninit();
+ out_destroy_wq:
+ xfs_destroy_workqueues();
+ out_destroy_caches:
+ xfs_destroy_caches();
+ out_destroy_hp:
+ xfs_cpu_hotplug_destroy();
+ out:
+ return error;
+}
+
+STATIC void __exit
+exit_xfs_fs(void)
+{
+ xfs_qm_exit();
+ unregister_filesystem(&xfs_fs_type);
+#ifdef DEBUG
+ xfs_sysfs_del(&xfs_dbg_kobj);
+#endif
+ xfs_sysfs_del(&xfsstats.xs_kobj);
+ free_percpu(xfsstats.xs_stats);
+ kset_unregister(xfs_kset);
+ xfs_sysctl_unregister();
+ xfs_cleanup_procfs();
+ xfs_mru_cache_uninit();
+ xfs_destroy_workqueues();
+ xfs_destroy_caches();
+ xfs_uuid_table_free();
+ xfs_cpu_hotplug_destroy();
+}
+
+module_init(init_xfs_fs);
+module_exit(exit_xfs_fs);
+
+MODULE_AUTHOR("Silicon Graphics, Inc.");
+MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled");
+MODULE_LICENSE("GPL");