[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/fs/xfs/xfs_super.c b/src/kernel/linux/v4.14/fs/xfs/xfs_super.c
new file mode 100644
index 0000000..10151c9
--- /dev/null
+++ b/src/kernel/linux/v4.14/fs/xfs/xfs_super.c
@@ -0,0 +1,2158 @@
+/*
+ * Copyright (c) 2000-2006 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "xfs.h"
+#include "xfs_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_da_format.h"
+#include "xfs_inode.h"
+#include "xfs_btree.h"
+#include "xfs_bmap.h"
+#include "xfs_alloc.h"
+#include "xfs_error.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_da_btree.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 <linux/namei.h>
+#include <linux/dax.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/mount.h>
+#include <linux/mempool.h>
+#include <linux/writeback.h>
+#include <linux/kthread.h>
+#include <linux/freezer.h>
+#include <linux/parser.h>
+
+static const struct super_operations xfs_super_operations;
+struct bio_set *xfs_ioend_bioset;
+
+static struct kset *xfs_kset; /* top-level xfs sysfs dir */
+#ifdef DEBUG
+static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */
+#endif
+
+/*
+ * Table driven mount option parser.
+ */
+enum {
+ Opt_logbufs, Opt_logbsize, Opt_logdev, Opt_rtdev, Opt_biosize,
+ Opt_wsync, Opt_noalign, Opt_swalloc, Opt_sunit, Opt_swidth, Opt_nouuid,
+ Opt_mtpt, Opt_grpid, Opt_nogrpid, Opt_bsdgroups, Opt_sysvgroups,
+ Opt_allocsize, Opt_norecovery, Opt_barrier, Opt_nobarrier,
+ 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_err,
+};
+
+static const match_table_t tokens = {
+ {Opt_logbufs, "logbufs=%u"}, /* number of XFS log buffers */
+ {Opt_logbsize, "logbsize=%s"}, /* size of XFS log buffers */
+ {Opt_logdev, "logdev=%s"}, /* log device */
+ {Opt_rtdev, "rtdev=%s"}, /* realtime I/O device */
+ {Opt_biosize, "biosize=%u"}, /* log2 of preferred buffered io size */
+ {Opt_wsync, "wsync"}, /* safe-mode nfs compatible mount */
+ {Opt_noalign, "noalign"}, /* turn off stripe alignment */
+ {Opt_swalloc, "swalloc"}, /* turn on stripe width allocation */
+ {Opt_sunit, "sunit=%u"}, /* data volume stripe unit */
+ {Opt_swidth, "swidth=%u"}, /* data volume stripe width */
+ {Opt_nouuid, "nouuid"}, /* ignore filesystem UUID */
+ {Opt_mtpt, "mtpt"}, /* filesystem mount point */
+ {Opt_grpid, "grpid"}, /* group-ID from parent directory */
+ {Opt_nogrpid, "nogrpid"}, /* group-ID from current process */
+ {Opt_bsdgroups, "bsdgroups"}, /* group-ID from parent directory */
+ {Opt_sysvgroups,"sysvgroups"}, /* group-ID from current process */
+ {Opt_allocsize, "allocsize=%s"},/* preferred allocation size */
+ {Opt_norecovery,"norecovery"}, /* don't run XFS recovery */
+ {Opt_inode64, "inode64"}, /* inodes can be allocated anywhere */
+ {Opt_inode32, "inode32"}, /* inode allocation limited to
+ * XFS_MAXINUMBER_32 */
+ {Opt_ikeep, "ikeep"}, /* do not free empty inode clusters */
+ {Opt_noikeep, "noikeep"}, /* free empty inode clusters */
+ {Opt_largeio, "largeio"}, /* report large I/O sizes in stat() */
+ {Opt_nolargeio, "nolargeio"}, /* do not report large I/O sizes
+ * in stat(). */
+ {Opt_attr2, "attr2"}, /* do use attr2 attribute format */
+ {Opt_noattr2, "noattr2"}, /* do not use attr2 attribute format */
+ {Opt_filestreams,"filestreams"},/* use filestreams allocator */
+ {Opt_quota, "quota"}, /* disk quotas (user) */
+ {Opt_noquota, "noquota"}, /* no quotas */
+ {Opt_usrquota, "usrquota"}, /* user quota enabled */
+ {Opt_grpquota, "grpquota"}, /* group quota enabled */
+ {Opt_prjquota, "prjquota"}, /* project quota enabled */
+ {Opt_uquota, "uquota"}, /* user quota (IRIX variant) */
+ {Opt_gquota, "gquota"}, /* group quota (IRIX variant) */
+ {Opt_pquota, "pquota"}, /* project quota (IRIX variant) */
+ {Opt_uqnoenforce,"uqnoenforce"},/* user quota limit enforcement */
+ {Opt_gqnoenforce,"gqnoenforce"},/* group quota limit enforcement */
+ {Opt_pqnoenforce,"pqnoenforce"},/* project quota limit enforcement */
+ {Opt_qnoenforce, "qnoenforce"}, /* same as uqnoenforce */
+ {Opt_discard, "discard"}, /* Discard unused blocks */
+ {Opt_nodiscard, "nodiscard"}, /* Do not discard unused blocks */
+
+ {Opt_dax, "dax"}, /* Enable direct access to bdev pages */
+
+ /* Deprecated mount options scheduled for removal */
+ {Opt_barrier, "barrier"}, /* use writer barriers for log write and
+ * unwritten extent conversion */
+ {Opt_nobarrier, "nobarrier"}, /* .. disable */
+
+ {Opt_err, NULL},
+};
+
+
+STATIC int
+suffix_kstrtoint(const substring_t *s, unsigned int base, int *res)
+{
+ int last, shift_left_factor = 0, _res;
+ char *value;
+ int ret = 0;
+
+ value = match_strdup(s);
+ 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;
+}
+
+/*
+ * This function fills in xfs_mount_t fields based on mount args.
+ * Note: the superblock has _not_ yet been read in.
+ *
+ * Note that this function leaks the various device name allocations on
+ * failure. The caller takes care of them.
+ *
+ * *sb is const because this is also used to test options on the remount
+ * path, and we don't want this to have any side effects at remount time.
+ * Today this function does not change *sb, but just to future-proof...
+ */
+STATIC int
+xfs_parseargs(
+ struct xfs_mount *mp,
+ char *options)
+{
+ const struct super_block *sb = mp->m_super;
+ char *p;
+ substring_t args[MAX_OPT_ARGS];
+ int dsunit = 0;
+ int dswidth = 0;
+ int iosize = 0;
+ uint8_t iosizelog = 0;
+
+ /*
+ * set up the mount name first so all the errors will refer to the
+ * correct device.
+ */
+ mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL);
+ if (!mp->m_fsname)
+ return -ENOMEM;
+ mp->m_fsname_len = strlen(mp->m_fsname) + 1;
+
+ /*
+ * Copy binary VFS mount flags we are interested in.
+ */
+ if (sb_rdonly(sb))
+ mp->m_flags |= XFS_MOUNT_RDONLY;
+ if (sb->s_flags & MS_DIRSYNC)
+ mp->m_flags |= XFS_MOUNT_DIRSYNC;
+ if (sb->s_flags & MS_SYNCHRONOUS)
+ mp->m_flags |= XFS_MOUNT_WSYNC;
+
+ /*
+ * Set some default flags that could be cleared by the mount option
+ * parsing.
+ */
+ mp->m_flags |= XFS_MOUNT_BARRIER;
+ mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
+
+ /*
+ * These can be overridden by the mount option parsing.
+ */
+ mp->m_logbufs = -1;
+ mp->m_logbsize = -1;
+
+ if (!options)
+ goto done;
+
+ while ((p = strsep(&options, ",")) != NULL) {
+ int token;
+
+ if (!*p)
+ continue;
+
+ token = match_token(p, tokens, args);
+ switch (token) {
+ case Opt_logbufs:
+ if (match_int(args, &mp->m_logbufs))
+ return -EINVAL;
+ break;
+ case Opt_logbsize:
+ if (suffix_kstrtoint(args, 10, &mp->m_logbsize))
+ return -EINVAL;
+ break;
+ case Opt_logdev:
+ mp->m_logname = match_strdup(args);
+ if (!mp->m_logname)
+ return -ENOMEM;
+ break;
+ case Opt_mtpt:
+ xfs_warn(mp, "%s option not allowed on this system", p);
+ return -EINVAL;
+ case Opt_rtdev:
+ mp->m_rtname = match_strdup(args);
+ if (!mp->m_rtname)
+ return -ENOMEM;
+ break;
+ case Opt_allocsize:
+ case Opt_biosize:
+ if (suffix_kstrtoint(args, 10, &iosize))
+ return -EINVAL;
+ iosizelog = ffs(iosize) - 1;
+ break;
+ case Opt_grpid:
+ case Opt_bsdgroups:
+ mp->m_flags |= XFS_MOUNT_GRPID;
+ break;
+ case Opt_nogrpid:
+ case Opt_sysvgroups:
+ mp->m_flags &= ~XFS_MOUNT_GRPID;
+ break;
+ case Opt_wsync:
+ mp->m_flags |= XFS_MOUNT_WSYNC;
+ break;
+ case Opt_norecovery:
+ mp->m_flags |= XFS_MOUNT_NORECOVERY;
+ break;
+ case Opt_noalign:
+ mp->m_flags |= XFS_MOUNT_NOALIGN;
+ break;
+ case Opt_swalloc:
+ mp->m_flags |= XFS_MOUNT_SWALLOC;
+ break;
+ case Opt_sunit:
+ if (match_int(args, &dsunit))
+ return -EINVAL;
+ break;
+ case Opt_swidth:
+ if (match_int(args, &dswidth))
+ return -EINVAL;
+ break;
+ case Opt_inode32:
+ mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
+ break;
+ case Opt_inode64:
+ mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
+ break;
+ case Opt_nouuid:
+ mp->m_flags |= XFS_MOUNT_NOUUID;
+ break;
+ case Opt_ikeep:
+ mp->m_flags |= XFS_MOUNT_IKEEP;
+ break;
+ case Opt_noikeep:
+ mp->m_flags &= ~XFS_MOUNT_IKEEP;
+ break;
+ case Opt_largeio:
+ mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE;
+ break;
+ case Opt_nolargeio:
+ mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE;
+ break;
+ case Opt_attr2:
+ mp->m_flags |= XFS_MOUNT_ATTR2;
+ break;
+ case Opt_noattr2:
+ mp->m_flags &= ~XFS_MOUNT_ATTR2;
+ mp->m_flags |= XFS_MOUNT_NOATTR2;
+ break;
+ case Opt_filestreams:
+ mp->m_flags |= XFS_MOUNT_FILESTREAMS;
+ break;
+ case Opt_noquota:
+ mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
+ mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
+ mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE;
+ break;
+ case Opt_quota:
+ case Opt_uquota:
+ case Opt_usrquota:
+ mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
+ XFS_UQUOTA_ENFD);
+ break;
+ case Opt_qnoenforce:
+ case Opt_uqnoenforce:
+ mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
+ mp->m_qflags &= ~XFS_UQUOTA_ENFD;
+ break;
+ case Opt_pquota:
+ case Opt_prjquota:
+ mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
+ XFS_PQUOTA_ENFD);
+ break;
+ case Opt_pqnoenforce:
+ mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
+ mp->m_qflags &= ~XFS_PQUOTA_ENFD;
+ break;
+ case Opt_gquota:
+ case Opt_grpquota:
+ mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
+ XFS_GQUOTA_ENFD);
+ break;
+ case Opt_gqnoenforce:
+ mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
+ mp->m_qflags &= ~XFS_GQUOTA_ENFD;
+ break;
+ case Opt_discard:
+ mp->m_flags |= XFS_MOUNT_DISCARD;
+ break;
+ case Opt_nodiscard:
+ mp->m_flags &= ~XFS_MOUNT_DISCARD;
+ break;
+#ifdef CONFIG_FS_DAX
+ case Opt_dax:
+ mp->m_flags |= XFS_MOUNT_DAX;
+ break;
+#endif
+ case Opt_barrier:
+ xfs_warn(mp, "%s option is deprecated, ignoring.", p);
+ mp->m_flags |= XFS_MOUNT_BARRIER;
+ break;
+ case Opt_nobarrier:
+ xfs_warn(mp, "%s option is deprecated, ignoring.", p);
+ mp->m_flags &= ~XFS_MOUNT_BARRIER;
+ break;
+ default:
+ xfs_warn(mp, "unknown mount option [%s].", p);
+ return -EINVAL;
+ }
+ }
+
+ /*
+ * no recovery flag requires a read-only mount
+ */
+ if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
+ !(mp->m_flags & XFS_MOUNT_RDONLY)) {
+ xfs_warn(mp, "no-recovery mounts must be read-only.");
+ return -EINVAL;
+ }
+
+ if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) {
+ xfs_warn(mp,
+ "sunit and swidth options incompatible with the noalign option");
+ return -EINVAL;
+ }
+
+#ifndef CONFIG_XFS_QUOTA
+ if (XFS_IS_QUOTA_RUNNING(mp)) {
+ xfs_warn(mp, "quota support not available in this kernel.");
+ return -EINVAL;
+ }
+#endif
+
+ if ((dsunit && !dswidth) || (!dsunit && dswidth)) {
+ xfs_warn(mp, "sunit and swidth must be specified together");
+ return -EINVAL;
+ }
+
+ if (dsunit && (dswidth % dsunit != 0)) {
+ xfs_warn(mp,
+ "stripe width (%d) must be a multiple of the stripe unit (%d)",
+ dswidth, dsunit);
+ return -EINVAL;
+ }
+
+done:
+ if (dsunit && !(mp->m_flags & XFS_MOUNT_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 = dsunit;
+ mp->m_swidth = dswidth;
+ }
+
+ 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 (iosizelog) {
+ if (iosizelog > XFS_MAX_IO_LOG ||
+ iosizelog < XFS_MIN_IO_LOG) {
+ xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
+ iosizelog, XFS_MIN_IO_LOG,
+ XFS_MAX_IO_LOG);
+ return -EINVAL;
+ }
+
+ mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE;
+ mp->m_readio_log = iosizelog;
+ mp->m_writeio_log = iosizelog;
+ }
+
+ return 0;
+}
+
+struct proc_xfs_info {
+ uint64_t flag;
+ char *str;
+};
+
+STATIC int
+xfs_showargs(
+ struct xfs_mount *mp,
+ struct seq_file *m)
+{
+ static struct proc_xfs_info xfs_info_set[] = {
+ /* the few simple ones we can get from the mount struct */
+ { XFS_MOUNT_IKEEP, ",ikeep" },
+ { XFS_MOUNT_WSYNC, ",wsync" },
+ { XFS_MOUNT_NOALIGN, ",noalign" },
+ { XFS_MOUNT_SWALLOC, ",swalloc" },
+ { XFS_MOUNT_NOUUID, ",nouuid" },
+ { XFS_MOUNT_NORECOVERY, ",norecovery" },
+ { XFS_MOUNT_ATTR2, ",attr2" },
+ { XFS_MOUNT_FILESTREAMS, ",filestreams" },
+ { XFS_MOUNT_GRPID, ",grpid" },
+ { XFS_MOUNT_DISCARD, ",discard" },
+ { XFS_MOUNT_SMALL_INUMS, ",inode32" },
+ { XFS_MOUNT_DAX, ",dax" },
+ { 0, NULL }
+ };
+ static struct proc_xfs_info xfs_info_unset[] = {
+ /* the few simple ones we can get from the mount struct */
+ { XFS_MOUNT_COMPAT_IOSIZE, ",largeio" },
+ { XFS_MOUNT_BARRIER, ",nobarrier" },
+ { XFS_MOUNT_SMALL_INUMS, ",inode64" },
+ { 0, NULL }
+ };
+ struct proc_xfs_info *xfs_infop;
+
+ for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
+ if (mp->m_flags & xfs_infop->flag)
+ seq_puts(m, xfs_infop->str);
+ }
+ for (xfs_infop = xfs_info_unset; 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, ",allocsize=%dk",
+ (int)(1 << mp->m_writeio_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_ACCT|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_ACCT) {
+ if (mp->m_qflags & XFS_PQUOTA_ENFD)
+ seq_puts(m, ",prjquota");
+ else
+ seq_puts(m, ",pqnoenforce");
+ }
+ if (mp->m_qflags & XFS_GQUOTA_ACCT) {
+ if (mp->m_qflags & XFS_GQUOTA_ENFD)
+ seq_puts(m, ",grpquota");
+ else
+ seq_puts(m, ",gqnoenforce");
+ }
+
+ if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
+ seq_puts(m, ",noquota");
+
+ return 0;
+}
+static uint64_t
+xfs_max_file_offset(
+ unsigned int blockshift)
+{
+ unsigned int pagefactor = 1;
+ unsigned int bitshift = BITS_PER_LONG - 1;
+
+ /* Figure out maximum filesize, on Linux this can depend on
+ * the filesystem blocksize (on 32 bit platforms).
+ * __block_write_begin does this in an [unsigned] long...
+ * page->index << (PAGE_SHIFT - bbits)
+ * So, for page sized blocks (4K on 32 bit platforms),
+ * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
+ * (((u64)PAGE_SIZE << (BITS_PER_LONG-1))-1)
+ * but for smaller blocksizes it is less (bbits = log2 bsize).
+ * Note1: get_block_t takes a long (implicit cast from above)
+ * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
+ * can optionally convert the [unsigned] long from above into
+ * an [unsigned] long long.
+ */
+
+#if BITS_PER_LONG == 32
+# if defined(CONFIG_LBDAF)
+ ASSERT(sizeof(sector_t) == 8);
+ pagefactor = PAGE_SIZE;
+ bitshift = BITS_PER_LONG;
+# else
+ pagefactor = PAGE_SIZE >> (PAGE_SHIFT - blockshift);
+# endif
+#endif
+
+ return (((uint64_t)pagefactor) << bitshift) - 1;
+}
+
+/*
+ * Set parameters for inode allocation heuristics, taking into account
+ * filesystem size and inode32/inode64 mount options; i.e. specifically
+ * whether or not XFS_MOUNT_SMALL_INUMS is set.
+ *
+ * Inode allocation patterns are altered only if inode32 is requested
+ * (XFS_MOUNT_SMALL_INUMS), and the filesystem is sufficiently large.
+ * If altered, XFS_MOUNT_32BITINODES 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 (mp->m_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_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0);
+ 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_MOUNT_32BITINODES if we must alter
+ * the allocator to accommodate the request.
+ */
+ if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > XFS_MAXINUMBER_32)
+ mp->m_flags |= XFS_MOUNT_32BITINODES;
+ else
+ mp->m_flags &= ~XFS_MOUNT_32BITINODES;
+
+ 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 (mp->m_flags & XFS_MOUNT_32BITINODES) {
+ 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 (mp->m_flags & XFS_MOUNT_32BITINODES) ? maxagi : agcount;
+}
+
+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);
+}
+
+void
+xfs_blkdev_issue_flush(
+ xfs_buftarg_t *buftarg)
+{
+ blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS, NULL);
+}
+
+STATIC void
+xfs_close_devices(
+ struct xfs_mount *mp)
+{
+ struct dax_device *dax_ddev = mp->m_ddev_targp->bt_daxdev;
+
+ if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
+ struct block_device *logdev = mp->m_logdev_targp->bt_bdev;
+ struct dax_device *dax_logdev = mp->m_logdev_targp->bt_daxdev;
+
+ xfs_free_buftarg(mp, mp->m_logdev_targp);
+ xfs_blkdev_put(logdev);
+ fs_put_dax(dax_logdev);
+ }
+ if (mp->m_rtdev_targp) {
+ struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;
+ struct dax_device *dax_rtdev = mp->m_rtdev_targp->bt_daxdev;
+
+ xfs_free_buftarg(mp, mp->m_rtdev_targp);
+ xfs_blkdev_put(rtdev);
+ fs_put_dax(dax_rtdev);
+ }
+ xfs_free_buftarg(mp, mp->m_ddev_targp);
+ fs_put_dax(dax_ddev);
+}
+
+/*
+ * 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 dax_device *dax_ddev = fs_dax_get_by_bdev(ddev);
+ struct dax_device *dax_logdev = NULL, *dax_rtdev = NULL;
+ 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)
+ goto out;
+ dax_logdev = fs_dax_get_by_bdev(logdev);
+ }
+
+ 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;
+ }
+ dax_rtdev = fs_dax_get_by_bdev(rtdev);
+ }
+
+ /*
+ * Setup xfs_mount buffer target pointers
+ */
+ error = -ENOMEM;
+ mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, dax_ddev);
+ if (!mp->m_ddev_targp)
+ goto out_close_rtdev;
+
+ if (rtdev) {
+ mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, dax_rtdev);
+ if (!mp->m_rtdev_targp)
+ goto out_free_ddev_targ;
+ }
+
+ if (logdev && logdev != ddev) {
+ mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, dax_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, mp->m_rtdev_targp);
+ out_free_ddev_targ:
+ xfs_free_buftarg(mp, mp->m_ddev_targp);
+ out_close_rtdev:
+ xfs_blkdev_put(rtdev);
+ fs_put_dax(dax_rtdev);
+ out_close_logdev:
+ if (logdev && logdev != ddev) {
+ xfs_blkdev_put(logdev);
+ fs_put_dax(dax_logdev);
+ }
+ out:
+ fs_put_dax(dax_ddev);
+ 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_sb_version_hassector(&mp->m_sb))
+ 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",
+ WQ_MEM_RECLAIM|WQ_FREEZABLE, 1, mp->m_fsname);
+ if (!mp->m_buf_workqueue)
+ goto out;
+
+ mp->m_data_workqueue = alloc_workqueue("xfs-data/%s",
+ WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
+ if (!mp->m_data_workqueue)
+ goto out_destroy_buf;
+
+ mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",
+ WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
+ if (!mp->m_unwritten_workqueue)
+ goto out_destroy_data_iodone_queue;
+
+ mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s",
+ WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
+ if (!mp->m_cil_workqueue)
+ goto out_destroy_unwritten;
+
+ mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s",
+ WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
+ if (!mp->m_reclaim_workqueue)
+ goto out_destroy_cil;
+
+ mp->m_log_workqueue = alloc_workqueue("xfs-log/%s",
+ WQ_MEM_RECLAIM|WQ_FREEZABLE|WQ_HIGHPRI, 0,
+ mp->m_fsname);
+ if (!mp->m_log_workqueue)
+ goto out_destroy_reclaim;
+
+ mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s",
+ WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
+ if (!mp->m_eofblocks_workqueue)
+ goto out_destroy_log;
+
+ mp->m_sync_workqueue = alloc_workqueue("xfs-sync/%s", WQ_FREEZABLE, 0,
+ mp->m_fsname);
+ if (!mp->m_sync_workqueue)
+ goto out_destroy_eofb;
+
+ return 0;
+
+out_destroy_eofb:
+ destroy_workqueue(mp->m_eofblocks_workqueue);
+out_destroy_log:
+ destroy_workqueue(mp->m_log_workqueue);
+out_destroy_reclaim:
+ destroy_workqueue(mp->m_reclaim_workqueue);
+out_destroy_cil:
+ destroy_workqueue(mp->m_cil_workqueue);
+out_destroy_unwritten:
+ destroy_workqueue(mp->m_unwritten_workqueue);
+out_destroy_data_iodone_queue:
+ destroy_workqueue(mp->m_data_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_eofblocks_workqueue);
+ destroy_workqueue(mp->m_log_workqueue);
+ destroy_workqueue(mp->m_reclaim_workqueue);
+ destroy_workqueue(mp->m_cil_workqueue);
+ destroy_workqueue(mp->m_data_workqueue);
+ destroy_workqueue(mp->m_unwritten_workqueue);
+ destroy_workqueue(mp->m_buf_workqueue);
+}
+
+/*
+ * 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)
+{
+ struct super_block *sb = mp->m_super;
+
+ if (down_read_trylock(&sb->s_umount)) {
+ sync_inodes_sb(sb);
+ up_read(&sb->s_umount);
+ }
+}
+
+/* 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);
+ int error;
+
+ 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);
+
+ if (xfs_is_reflink_inode(ip)) {
+ error = xfs_reflink_cancel_cow_range(ip, 0, NULLFILEOFF, true);
+ if (error && !XFS_FORCED_SHUTDOWN(ip->i_mount))
+ xfs_warn(ip->i_mount,
+"Error %d while evicting CoW blocks for inode %llu.",
+ error, ip->i_ino);
+ }
+
+ xfs_inactive(ip);
+
+ ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0);
+ XFS_STATS_INC(ip->i_mount, vn_reclaim);
+
+ /*
+ * We should never get here with one of the reclaim flags already set.
+ */
+ ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
+ ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM));
+
+ /*
+ * We always use background reclaim here because even if the
+ * inode is clean, it still may be under IO and hence we have
+ * to take the flush lock. The background reclaim path handles
+ * this more efficiently than we can here, so simply let background
+ * reclaim tear down all inodes.
+ */
+ xfs_inode_set_reclaim_tag(ip);
+}
+
+/*
+ * 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_mmaplock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
+ "xfsino", ip->i_ino);
+ 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(ip->i_mount->m_log->l_flags & XLOG_RECOVERY_NEEDED);
+ return 0;
+ }
+
+ return generic_drop_inode(inode) || (ip->i_flags & XFS_IDONTCACHE);
+}
+
+STATIC void
+xfs_free_fsname(
+ struct xfs_mount *mp)
+{
+ kfree(mp->m_fsname);
+ kfree(mp->m_rtname);
+ kfree(mp->m_logname);
+}
+
+STATIC int
+xfs_fs_sync_fs(
+ struct super_block *sb,
+ int wait)
+{
+ struct xfs_mount *mp = XFS_M(sb);
+
+ /*
+ * Doing anything during the async pass would be counterproductive.
+ */
+ if (!wait)
+ return 0;
+
+ xfs_log_force(mp, XFS_LOG_SYNC);
+ 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);
+ }
+
+ 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;
+
+ statp->f_type = XFS_SB_MAGIC;
+ statp->f_namelen = MAXNAMELEN - 1;
+
+ id = huge_encode_dev(mp->m_ddev_targp->bt_dev);
+ statp->f_fsid.val[0] = (u32)id;
+ statp->f_fsid.val[1] = (u32)(id >> 32);
+
+ 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);
+
+ statp->f_bfree = fdblocks - mp->m_alloc_set_aside;
+ statp->f_bavail = statp->f_bfree;
+
+ fakeinos = statp->f_bfree << sbp->sb_inopblog;
+ statp->f_files = MIN(icount + fakeinos, (uint64_t)XFS_MAXINUMBER);
+ if (mp->m_maxicount)
+ statp->f_files = min_t(typeof(statp->f_files),
+ statp->f_files,
+ mp->m_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_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
+ ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) ==
+ (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))
+ xfs_qm_statvfs(ip, statp);
+ 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);
+}
+
+/*
+ * Trigger writeback of all the dirty metadata in the file system.
+ *
+ * This ensures that the metadata is written to their location on disk rather
+ * than just existing in transactions in the log. This means after a quiesce
+ * there is no log replay required to write the inodes to disk - this is the
+ * primary difference between a sync and a quiesce.
+ *
+ * Note: xfs_log_quiesce() stops background log work - the callers must ensure
+ * it is started again when appropriate.
+ */
+void
+xfs_quiesce_attr(
+ struct xfs_mount *mp)
+{
+ int error = 0;
+
+ /* wait for all modifications to complete */
+ while (atomic_read(&mp->m_active_trans) > 0)
+ delay(100);
+
+ /* force the log to unpin objects from the now complete transactions */
+ xfs_log_force(mp, XFS_LOG_SYNC);
+
+ /* reclaim inodes to do any IO before the freeze completes */
+ xfs_reclaim_inodes(mp, 0);
+ xfs_reclaim_inodes(mp, SYNC_WAIT);
+
+ /* Push the superblock and write an unmount record */
+ error = xfs_log_sbcount(mp);
+ if (error)
+ xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. "
+ "Frozen image may not be consistent.");
+ /*
+ * Just warn here till VFS can correctly support
+ * read-only remount without racing.
+ */
+ WARN_ON(atomic_read(&mp->m_active_trans) != 0);
+
+ xfs_log_quiesce(mp);
+}
+
+STATIC int
+xfs_test_remount_options(
+ struct super_block *sb,
+ struct xfs_mount *mp,
+ char *options)
+{
+ int error = 0;
+ struct xfs_mount *tmp_mp;
+
+ tmp_mp = kmem_zalloc(sizeof(*tmp_mp), KM_MAYFAIL);
+ if (!tmp_mp)
+ return -ENOMEM;
+
+ tmp_mp->m_super = sb;
+ error = xfs_parseargs(tmp_mp, options);
+ xfs_free_fsname(tmp_mp);
+ kmem_free(tmp_mp);
+
+ return error;
+}
+
+STATIC int
+xfs_fs_remount(
+ struct super_block *sb,
+ int *flags,
+ char *options)
+{
+ struct xfs_mount *mp = XFS_M(sb);
+ xfs_sb_t *sbp = &mp->m_sb;
+ substring_t args[MAX_OPT_ARGS];
+ char *p;
+ int error;
+
+ /* First, check for complete junk; i.e. invalid options */
+ error = xfs_test_remount_options(sb, mp, options);
+ if (error)
+ return error;
+
+ sync_filesystem(sb);
+ while ((p = strsep(&options, ",")) != NULL) {
+ int token;
+
+ if (!*p)
+ continue;
+
+ token = match_token(p, tokens, args);
+ switch (token) {
+ case Opt_barrier:
+ xfs_warn(mp, "%s option is deprecated, ignoring.", p);
+ mp->m_flags |= XFS_MOUNT_BARRIER;
+ break;
+ case Opt_nobarrier:
+ xfs_warn(mp, "%s option is deprecated, ignoring.", p);
+ mp->m_flags &= ~XFS_MOUNT_BARRIER;
+ break;
+ case Opt_inode64:
+ mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
+ mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
+ break;
+ case Opt_inode32:
+ mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
+ mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
+ break;
+ default:
+ /*
+ * 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.
+ */
+#if 0
+ xfs_info(mp,
+ "mount option \"%s\" not supported for remount", p);
+ return -EINVAL;
+#else
+ break;
+#endif
+ }
+ }
+
+ /* ro -> rw */
+ if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) {
+ if (mp->m_flags & XFS_MOUNT_NORECOVERY) {
+ xfs_warn(mp,
+ "ro->rw transition prohibited on norecovery mount");
+ return -EINVAL;
+ }
+
+ if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 &&
+ 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;
+ }
+
+ mp->m_flags &= ~XFS_MOUNT_RDONLY;
+
+ /*
+ * 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_queue_eofblocks(mp);
+
+ /* Recover any CoW blocks that never got remapped. */
+ error = xfs_reflink_recover_cow(mp);
+ if (error) {
+ xfs_err(mp,
+ "Error %d recovering leftover CoW allocations.", error);
+ xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
+ return error;
+ }
+
+ /* Create the per-AG metadata reservation pool .*/
+ error = xfs_fs_reserve_ag_blocks(mp);
+ if (error && error != -ENOSPC)
+ return error;
+ }
+
+ /* rw -> ro */
+ if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
+ /* 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);
+
+ /*
+ * Cancel background eofb scanning so it cannot race with the
+ * final log force+buftarg wait and deadlock the remount.
+ */
+ cancel_delayed_work_sync(&mp->m_eofblocks_work);
+
+ xfs_quiesce_attr(mp);
+ mp->m_flags |= XFS_MOUNT_RDONLY;
+ }
+
+ return 0;
+}
+
+/*
+ * 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);
+
+ xfs_save_resvblks(mp);
+ xfs_quiesce_attr(mp);
+ return xfs_sync_sb(mp, true);
+}
+
+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);
+ return 0;
+}
+
+STATIC int
+xfs_fs_show_options(
+ struct seq_file *m,
+ struct dentry *root)
+{
+ return xfs_showargs(XFS_M(root->d_sb), m);
+}
+
+/*
+ * 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)
+{
+ int ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
+
+ /* Fail a mount where the logbuf is smaller than the log stripe */
+ if (xfs_sb_version_haslogv2(&mp->m_sb)) {
+ 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_sb_version_hascrc(&mp->m_sb) &&
+ (mp->m_flags & XFS_MOUNT_NOATTR2)) {
+ xfs_warn(mp, "Cannot mount a V5 filesystem as noattr2. "
+ "attr2 is always enabled for V5 filesystems.");
+ return -EINVAL;
+ }
+
+ /*
+ * mkfs'ed attr2 will turn on attr2 mount unless explicitly
+ * told by noattr2 to turn it off
+ */
+ if (xfs_sb_version_hasattr2(&mp->m_sb) &&
+ !(mp->m_flags & XFS_MOUNT_NOATTR2))
+ mp->m_flags |= XFS_MOUNT_ATTR2;
+
+ /*
+ * prohibit r/w mounts of read-only filesystems
+ */
+ if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
+ xfs_warn(mp,
+ "cannot mount a read-only filesystem as read-write");
+ return -EROFS;
+ }
+
+ if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
+ (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) &&
+ !xfs_sb_version_has_pquotino(&mp->m_sb)) {
+ 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;
+
+ return 0;
+
+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);
+}
+
+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);
+}
+
+STATIC int
+xfs_fs_fill_super(
+ struct super_block *sb,
+ void *data,
+ int silent)
+{
+ struct inode *root;
+ struct xfs_mount *mp = NULL;
+ int flags = 0, error = -ENOMEM;
+
+ mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL);
+ if (!mp)
+ goto out;
+
+ spin_lock_init(&mp->m_sb_lock);
+ mutex_init(&mp->m_growlock);
+ atomic_set(&mp->m_active_trans, 0);
+ INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker);
+ INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker);
+ INIT_DELAYED_WORK(&mp->m_cowblocks_work, xfs_cowblocks_worker);
+ mp->m_kobj.kobject.kset = xfs_kset;
+
+ mp->m_super = sb;
+ sb->s_fs_info = mp;
+
+ error = xfs_parseargs(mp, (char *)data);
+ if (error)
+ goto out_free_fsname;
+
+ 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;
+
+ if (silent)
+ flags |= XFS_MFSI_QUIET;
+
+ error = xfs_open_devices(mp);
+ if (error)
+ goto out_free_fsname;
+
+ error = xfs_init_mount_workqueues(mp);
+ if (error)
+ goto out_close_devices;
+
+ error = xfs_init_percpu_counters(mp);
+ if (error)
+ goto out_destroy_workqueues;
+
+ /* 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_counters;
+ }
+
+ 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;
+
+ 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_SB_MAGIC;
+ sb->s_blocksize = mp->m_sb.sb_blocksize;
+ sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;
+ sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
+ sb->s_max_links = XFS_MAXLINK;
+ sb->s_time_gran = 1;
+ set_posix_acl_flag(sb);
+
+ /* version 5 superblocks support inode version counters. */
+ if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5)
+ sb->s_flags |= SB_I_VERSION;
+
+ if (mp->m_flags & XFS_MOUNT_DAX) {
+ bool rtdev_is_dax = false, datadev_is_dax;
+
+ xfs_warn(mp,
+ "DAX enabled. Warning: EXPERIMENTAL, use at your own risk");
+
+ datadev_is_dax = bdev_dax_supported(mp->m_ddev_targp->bt_bdev,
+ sb->s_blocksize);
+ if (mp->m_rtdev_targp)
+ rtdev_is_dax = bdev_dax_supported(
+ mp->m_rtdev_targp->bt_bdev, sb->s_blocksize);
+ if (!rtdev_is_dax && !datadev_is_dax) {
+ xfs_alert(mp,
+ "DAX unsupported by block device. Turning off DAX.");
+ mp->m_flags &= ~XFS_MOUNT_DAX;
+ }
+ if (xfs_sb_version_hasreflink(&mp->m_sb))
+ xfs_alert(mp,
+ "DAX and reflink have not been tested together!");
+ }
+
+ if (mp->m_flags & XFS_MOUNT_DISCARD) {
+ struct request_queue *q = bdev_get_queue(sb->s_bdev);
+
+ if (!blk_queue_discard(q)) {
+ xfs_warn(mp, "mounting with \"discard\" option, but "
+ "the device does not support discard");
+ mp->m_flags &= ~XFS_MOUNT_DISCARD;
+ }
+ }
+
+ if (xfs_sb_version_hasrmapbt(&mp->m_sb)) {
+ if (mp->m_sb.sb_rblocks) {
+ xfs_alert(mp,
+ "EXPERIMENTAL reverse mapping btree not compatible with realtime device!");
+ error = -EINVAL;
+ goto out_filestream_unmount;
+ }
+ xfs_alert(mp,
+ "EXPERIMENTAL reverse mapping btree feature enabled. Use at your own risk!");
+ }
+
+ if (xfs_sb_version_hasreflink(&mp->m_sb))
+ xfs_alert(mp,
+ "EXPERIMENTAL reflink feature enabled. 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_counters:
+ xfs_destroy_percpu_counters(mp);
+ out_destroy_workqueues:
+ xfs_destroy_mount_workqueues(mp);
+ out_close_devices:
+ xfs_close_devices(mp);
+ out_free_fsname:
+ sb->s_fs_info = NULL;
+ xfs_free_fsname(mp);
+ kfree(mp);
+ out:
+ return error;
+
+ out_unmount:
+ xfs_filestream_unmount(mp);
+ xfs_unmountfs(mp);
+ goto out_free_sb;
+}
+
+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_destroy_percpu_counters(mp);
+ xfs_destroy_mount_workqueues(mp);
+ xfs_close_devices(mp);
+
+ sb->s_fs_info = NULL;
+ xfs_free_fsname(mp);
+ kfree(mp);
+}
+
+STATIC struct dentry *
+xfs_fs_mount(
+ struct file_system_type *fs_type,
+ int flags,
+ const char *dev_name,
+ void *data)
+{
+ return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super);
+}
+
+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,
+ .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,
+ .remount_fs = xfs_fs_remount,
+ .show_options = xfs_fs_show_options,
+ .nr_cached_objects = xfs_fs_nr_cached_objects,
+ .free_cached_objects = xfs_fs_free_cached_objects,
+};
+
+static struct file_system_type xfs_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "xfs",
+ .mount = xfs_fs_mount,
+ .kill_sb = kill_block_super,
+ .fs_flags = FS_REQUIRES_DEV,
+};
+MODULE_ALIAS_FS("xfs");
+
+STATIC int __init
+xfs_init_zones(void)
+{
+ xfs_ioend_bioset = bioset_create(4 * MAX_BUF_PER_PAGE,
+ offsetof(struct xfs_ioend, io_inline_bio),
+ BIOSET_NEED_BVECS);
+ if (!xfs_ioend_bioset)
+ goto out;
+
+ xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t),
+ "xfs_log_ticket");
+ if (!xfs_log_ticket_zone)
+ goto out_free_ioend_bioset;
+
+ xfs_bmap_free_item_zone = kmem_zone_init(
+ sizeof(struct xfs_extent_free_item),
+ "xfs_bmap_free_item");
+ if (!xfs_bmap_free_item_zone)
+ goto out_destroy_log_ticket_zone;
+
+ xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t),
+ "xfs_btree_cur");
+ if (!xfs_btree_cur_zone)
+ goto out_destroy_bmap_free_item_zone;
+
+ xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t),
+ "xfs_da_state");
+ if (!xfs_da_state_zone)
+ goto out_destroy_btree_cur_zone;
+
+ xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
+ if (!xfs_ifork_zone)
+ goto out_destroy_da_state_zone;
+
+ xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans");
+ if (!xfs_trans_zone)
+ goto out_destroy_ifork_zone;
+
+ xfs_log_item_desc_zone =
+ kmem_zone_init(sizeof(struct xfs_log_item_desc),
+ "xfs_log_item_desc");
+ if (!xfs_log_item_desc_zone)
+ goto out_destroy_trans_zone;
+
+ /*
+ * 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(struct xfs_buf_log_item),
+ "xfs_buf_item");
+ if (!xfs_buf_item_zone)
+ goto out_destroy_log_item_desc_zone;
+
+ 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");
+ if (!xfs_efd_zone)
+ goto out_destroy_buf_item_zone;
+
+ 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");
+ if (!xfs_efi_zone)
+ goto out_destroy_efd_zone;
+
+ xfs_inode_zone =
+ kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode",
+ KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD |
+ KM_ZONE_ACCOUNT, xfs_fs_inode_init_once);
+ if (!xfs_inode_zone)
+ goto out_destroy_efi_zone;
+
+ xfs_ili_zone =
+ kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili",
+ KM_ZONE_SPREAD, NULL);
+ if (!xfs_ili_zone)
+ goto out_destroy_inode_zone;
+ xfs_icreate_zone = kmem_zone_init(sizeof(struct xfs_icreate_item),
+ "xfs_icr");
+ if (!xfs_icreate_zone)
+ goto out_destroy_ili_zone;
+
+ xfs_rud_zone = kmem_zone_init(sizeof(struct xfs_rud_log_item),
+ "xfs_rud_item");
+ if (!xfs_rud_zone)
+ goto out_destroy_icreate_zone;
+
+ xfs_rui_zone = kmem_zone_init(
+ xfs_rui_log_item_sizeof(XFS_RUI_MAX_FAST_EXTENTS),
+ "xfs_rui_item");
+ if (!xfs_rui_zone)
+ goto out_destroy_rud_zone;
+
+ xfs_cud_zone = kmem_zone_init(sizeof(struct xfs_cud_log_item),
+ "xfs_cud_item");
+ if (!xfs_cud_zone)
+ goto out_destroy_rui_zone;
+
+ xfs_cui_zone = kmem_zone_init(
+ xfs_cui_log_item_sizeof(XFS_CUI_MAX_FAST_EXTENTS),
+ "xfs_cui_item");
+ if (!xfs_cui_zone)
+ goto out_destroy_cud_zone;
+
+ xfs_bud_zone = kmem_zone_init(sizeof(struct xfs_bud_log_item),
+ "xfs_bud_item");
+ if (!xfs_bud_zone)
+ goto out_destroy_cui_zone;
+
+ xfs_bui_zone = kmem_zone_init(
+ xfs_bui_log_item_sizeof(XFS_BUI_MAX_FAST_EXTENTS),
+ "xfs_bui_item");
+ if (!xfs_bui_zone)
+ goto out_destroy_bud_zone;
+
+ return 0;
+
+ out_destroy_bud_zone:
+ kmem_zone_destroy(xfs_bud_zone);
+ out_destroy_cui_zone:
+ kmem_zone_destroy(xfs_cui_zone);
+ out_destroy_cud_zone:
+ kmem_zone_destroy(xfs_cud_zone);
+ out_destroy_rui_zone:
+ kmem_zone_destroy(xfs_rui_zone);
+ out_destroy_rud_zone:
+ kmem_zone_destroy(xfs_rud_zone);
+ out_destroy_icreate_zone:
+ kmem_zone_destroy(xfs_icreate_zone);
+ out_destroy_ili_zone:
+ kmem_zone_destroy(xfs_ili_zone);
+ out_destroy_inode_zone:
+ kmem_zone_destroy(xfs_inode_zone);
+ out_destroy_efi_zone:
+ kmem_zone_destroy(xfs_efi_zone);
+ out_destroy_efd_zone:
+ kmem_zone_destroy(xfs_efd_zone);
+ out_destroy_buf_item_zone:
+ kmem_zone_destroy(xfs_buf_item_zone);
+ out_destroy_log_item_desc_zone:
+ kmem_zone_destroy(xfs_log_item_desc_zone);
+ out_destroy_trans_zone:
+ kmem_zone_destroy(xfs_trans_zone);
+ out_destroy_ifork_zone:
+ kmem_zone_destroy(xfs_ifork_zone);
+ out_destroy_da_state_zone:
+ kmem_zone_destroy(xfs_da_state_zone);
+ out_destroy_btree_cur_zone:
+ kmem_zone_destroy(xfs_btree_cur_zone);
+ out_destroy_bmap_free_item_zone:
+ kmem_zone_destroy(xfs_bmap_free_item_zone);
+ out_destroy_log_ticket_zone:
+ kmem_zone_destroy(xfs_log_ticket_zone);
+ out_free_ioend_bioset:
+ bioset_free(xfs_ioend_bioset);
+ out:
+ return -ENOMEM;
+}
+
+STATIC void
+xfs_destroy_zones(void)
+{
+ /*
+ * Make sure all delayed rcu free are flushed before we
+ * destroy caches.
+ */
+ rcu_barrier();
+ kmem_zone_destroy(xfs_bui_zone);
+ kmem_zone_destroy(xfs_bud_zone);
+ kmem_zone_destroy(xfs_cui_zone);
+ kmem_zone_destroy(xfs_cud_zone);
+ kmem_zone_destroy(xfs_rui_zone);
+ kmem_zone_destroy(xfs_rud_zone);
+ kmem_zone_destroy(xfs_icreate_zone);
+ kmem_zone_destroy(xfs_ili_zone);
+ kmem_zone_destroy(xfs_inode_zone);
+ kmem_zone_destroy(xfs_efi_zone);
+ kmem_zone_destroy(xfs_efd_zone);
+ kmem_zone_destroy(xfs_buf_item_zone);
+ kmem_zone_destroy(xfs_log_item_desc_zone);
+ kmem_zone_destroy(xfs_trans_zone);
+ kmem_zone_destroy(xfs_ifork_zone);
+ kmem_zone_destroy(xfs_da_state_zone);
+ kmem_zone_destroy(xfs_btree_cur_zone);
+ kmem_zone_destroy(xfs_bmap_free_item_zone);
+ kmem_zone_destroy(xfs_log_ticket_zone);
+ bioset_free(xfs_ioend_bioset);
+}
+
+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",
+ WQ_MEM_RECLAIM|WQ_FREEZABLE, 0);
+ if (!xfs_alloc_wq)
+ return -ENOMEM;
+
+ xfs_discard_wq = alloc_workqueue("xfsdiscard", 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);
+}
+
+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_extent_free_init_defer_op();
+ xfs_rmap_update_init_defer_op();
+ xfs_refcount_update_init_defer_op();
+ xfs_bmap_update_init_defer_op();
+
+ xfs_dir_startup();
+
+ error = xfs_init_zones();
+ if (error)
+ goto out;
+
+ error = xfs_init_workqueues();
+ if (error)
+ goto out_destroy_zones;
+
+ error = xfs_mru_cache_init();
+ if (error)
+ goto out_destroy_wq;
+
+ error = xfs_buf_init();
+ if (error)
+ goto out_mru_cache_uninit;
+
+ error = xfs_init_procfs();
+ if (error)
+ goto out_buf_terminate;
+
+ 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_buf_terminate:
+ xfs_buf_terminate();
+ out_mru_cache_uninit:
+ xfs_mru_cache_uninit();
+ out_destroy_wq:
+ xfs_destroy_workqueues();
+ out_destroy_zones:
+ xfs_destroy_zones();
+ 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_buf_terminate();
+ xfs_mru_cache_uninit();
+ xfs_destroy_workqueues();
+ xfs_destroy_zones();
+ xfs_uuid_table_free();
+}
+
+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");