#include "xfs_rw.h"
#include "xfs_quota.h"
#include "xfs_fsops.h"
+#include "xfs_utils.h"
-STATIC void xfs_mount_log_sbunit(xfs_mount_t *, __int64_t);
+STATIC int xfs_mount_log_sb(xfs_mount_t *, __int64_t);
STATIC int xfs_uuid_mount(xfs_mount_t *);
STATIC void xfs_uuid_unmount(xfs_mount_t *mp);
STATIC void xfs_unmountfs_wait(xfs_mount_t *);
STATIC void xfs_icsb_destroy_counters(xfs_mount_t *);
STATIC void xfs_icsb_balance_counter(xfs_mount_t *, xfs_sb_field_t,
int, int);
-STATIC void xfs_icsb_sync_counters(xfs_mount_t *);
STATIC int xfs_icsb_modify_counters(xfs_mount_t *, xfs_sb_field_t,
int64_t, int);
-STATIC int xfs_icsb_disable_counter(xfs_mount_t *, xfs_sb_field_t);
+STATIC void xfs_icsb_disable_counter(xfs_mount_t *, xfs_sb_field_t);
#else
#define xfs_icsb_destroy_counters(mp) do { } while (0)
#define xfs_icsb_balance_counter(mp, a, b, c) do { } while (0)
-#define xfs_icsb_sync_counters(mp) do { } while (0)
#define xfs_icsb_modify_counters(mp, a, b, c) do { } while (0)
#endif
{ offsetof(xfs_sb_t, sb_logsectsize),0 },
{ offsetof(xfs_sb_t, sb_logsunit), 0 },
{ offsetof(xfs_sb_t, sb_features2), 0 },
+ { offsetof(xfs_sb_t, sb_bad_features2), 0 },
{ sizeof(xfs_sb_t), 0 }
};
to->sb_logsectsize = be16_to_cpu(from->sb_logsectsize);
to->sb_logsunit = be32_to_cpu(from->sb_logsunit);
to->sb_features2 = be32_to_cpu(from->sb_features2);
+ to->sb_bad_features2 = be32_to_cpu(from->sb_bad_features2);
}
/*
{
xfs_sb_t *sbp = &(mp->m_sb);
xfs_inode_t *rip;
- bhv_vnode_t *rvp = NULL;
__uint64_t resblks;
__int64_t update_flags = 0LL;
uint quotamount, quotaflags;
int uuid_mounted = 0;
int error = 0;
- if (mp->m_sb_bp == NULL) {
- error = xfs_readsb(mp, mfsi_flags);
- if (error)
- return error;
- }
xfs_mount_common(mp, sbp);
+ /*
+ * Check for a mismatched features2 values. Older kernels
+ * read & wrote into the wrong sb offset for sb_features2
+ * on some platforms due to xfs_sb_t not being 64bit size aligned
+ * when sb_features2 was added, which made older superblock
+ * reading/writing routines swap it as a 64-bit value.
+ *
+ * For backwards compatibility, we make both slots equal.
+ *
+ * If we detect a mismatched field, we OR the set bits into the
+ * existing features2 field in case it has already been modified; we
+ * don't want to lose any features. We then update the bad location
+ * with the ORed value so that older kernels will see any features2
+ * flags, and mark the two fields as needing updates once the
+ * transaction subsystem is online.
+ */
+ if (xfs_sb_has_mismatched_features2(sbp)) {
+ cmn_err(CE_WARN,
+ "XFS: correcting sb_features alignment problem");
+ sbp->sb_features2 |= sbp->sb_bad_features2;
+ sbp->sb_bad_features2 = sbp->sb_features2;
+ update_flags |= XFS_SB_FEATURES2 | XFS_SB_BAD_FEATURES2;
+
+ /*
+ * Re-check for ATTR2 in case it was found in bad_features2
+ * slot.
+ */
+ if (xfs_sb_version_hasattr2(&mp->m_sb))
+ mp->m_flags |= XFS_MOUNT_ATTR2;
+
+ }
+
/*
* Check if sb_agblocks is aligned at stripe boundary
* If sb_agblocks is NOT aligned turn off m_dalign since
}
ASSERT(rip != NULL);
- rvp = XFS_ITOV(rip);
if (unlikely((rip->i_d.di_mode & S_IFMT) != S_IFDIR)) {
cmn_err(CE_WARN, "XFS: corrupted root inode");
}
/*
- * If fs is not mounted readonly, then update the superblock
- * unit and width changes.
+ * If fs is not mounted readonly, then update the superblock changes.
*/
- if (update_flags && !(mp->m_flags & XFS_MOUNT_RDONLY))
- xfs_mount_log_sbunit(mp, update_flags);
+ if (update_flags && !(mp->m_flags & XFS_MOUNT_RDONLY)) {
+ error = xfs_mount_log_sb(mp, update_flags);
+ if (error) {
+ cmn_err(CE_WARN, "XFS: failed to write sb changes");
+ goto error4;
+ }
+ }
/*
* Initialise the XFS quota management subsystem for this mount
*
* We default to 5% or 1024 fsbs of space reserved, whichever is smaller.
* This may drive us straight to ENOSPC on mount, but that implies
- * we were already there on the last unmount.
+ * we were already there on the last unmount. Warn if this occurs.
*/
resblks = mp->m_sb.sb_dblocks;
do_div(resblks, 20);
resblks = min_t(__uint64_t, resblks, 1024);
- xfs_reserve_blocks(mp, &resblks, NULL);
+ error = xfs_reserve_blocks(mp, &resblks, NULL);
+ if (error)
+ cmn_err(CE_WARN, "XFS: Unable to allocate reserve blocks. "
+ "Continuing without a reserve pool.");
return 0;
/*
* Free up the root inode.
*/
- VN_RELE(rvp);
+ IRELE(rip);
error3:
xfs_log_unmount_dealloc(mp);
error2:
xfs_unmountfs(xfs_mount_t *mp, struct cred *cr)
{
__uint64_t resblks;
+ int error = 0;
/*
* We can potentially deadlock here if we have an inode cluster
* value does not matter....
*/
resblks = 0;
- xfs_reserve_blocks(mp, &resblks, NULL);
+ error = xfs_reserve_blocks(mp, &resblks, NULL);
+ if (error)
+ cmn_err(CE_WARN, "XFS: Unable to free reserved block pool. "
+ "Freespace may not be correct on next mount.");
- xfs_log_sbcount(mp, 1);
+ error = xfs_log_sbcount(mp, 1);
+ if (error)
+ cmn_err(CE_WARN, "XFS: Unable to update superblock counters. "
+ "Freespace may not be correct on next mount.");
xfs_unmountfs_writesb(mp);
xfs_unmountfs_wait(mp); /* wait for async bufs */
xfs_log_unmount(mp); /* Done! No more fs ops. */
if (!xfs_fs_writable(mp))
return 0;
- xfs_icsb_sync_counters(mp);
+ xfs_icsb_sync_counters(mp, 0);
/*
* we don't need to do this if we are updating the superblock
xfs_mod_sb(tp, XFS_SB_IFREE | XFS_SB_ICOUNT | XFS_SB_FDBLOCKS);
if (sync)
xfs_trans_set_sync(tp);
- xfs_trans_commit(tp, 0);
-
- return 0;
+ error = xfs_trans_commit(tp, 0);
+ return error;
}
STATIC void
XFS_BUF_UNASYNC(sbp);
ASSERT(XFS_BUF_TARGET(sbp) == mp->m_ddev_targp);
xfsbdstrat(mp, sbp);
- /* Nevermind errors we might get here. */
error = xfs_iowait(sbp);
if (error)
xfs_ioerror_alert("xfs_unmountfs_writesb",
/*
* Used to log changes to the superblock unit and width fields which could
- * be altered by the mount options. Only the first superblock is updated.
+ * be altered by the mount options, as well as any potential sb_features2
+ * fixup. Only the first superblock is updated.
*/
-STATIC void
-xfs_mount_log_sbunit(
+STATIC int
+xfs_mount_log_sb(
xfs_mount_t *mp,
__int64_t fields)
{
xfs_trans_t *tp;
+ int error;
- ASSERT(fields & (XFS_SB_UNIT|XFS_SB_WIDTH|XFS_SB_UUID));
+ ASSERT(fields & (XFS_SB_UNIT | XFS_SB_WIDTH | XFS_SB_UUID |
+ XFS_SB_FEATURES2 | XFS_SB_BAD_FEATURES2));
tp = xfs_trans_alloc(mp, XFS_TRANS_SB_UNIT);
- if (xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
- XFS_DEFAULT_LOG_COUNT)) {
+ error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
+ XFS_DEFAULT_LOG_COUNT);
+ if (error) {
xfs_trans_cancel(tp, 0);
- return;
+ return error;
}
xfs_mod_sb(tp, fields);
- xfs_trans_commit(tp, 0);
+ error = xfs_trans_commit(tp, 0);
+ return error;
}
return test_bit(field, &mp->m_icsb_counters);
}
-STATIC int
+STATIC void
xfs_icsb_disable_counter(
xfs_mount_t *mp,
xfs_sb_field_t field)
* the m_icsb_mutex.
*/
if (xfs_icsb_counter_disabled(mp, field))
- return 0;
+ return;
xfs_icsb_lock_all_counters(mp);
if (!test_and_set_bit(field, &mp->m_icsb_counters)) {
}
xfs_icsb_unlock_all_counters(mp);
-
- return 0;
}
STATIC void
}
void
-xfs_icsb_sync_counters_flags(
+xfs_icsb_sync_counters_locked(
xfs_mount_t *mp,
int flags)
{
xfs_icsb_cnts_t cnt;
- /* Pass 1: lock all counters */
- if ((flags & XFS_ICSB_SB_LOCKED) == 0)
- spin_lock(&mp->m_sb_lock);
-
xfs_icsb_count(mp, &cnt, flags);
- /* Step 3: update mp->m_sb fields */
if (!xfs_icsb_counter_disabled(mp, XFS_SBS_ICOUNT))
mp->m_sb.sb_icount = cnt.icsb_icount;
if (!xfs_icsb_counter_disabled(mp, XFS_SBS_IFREE))
mp->m_sb.sb_ifree = cnt.icsb_ifree;
if (!xfs_icsb_counter_disabled(mp, XFS_SBS_FDBLOCKS))
mp->m_sb.sb_fdblocks = cnt.icsb_fdblocks;
-
- if ((flags & XFS_ICSB_SB_LOCKED) == 0)
- spin_unlock(&mp->m_sb_lock);
}
/*
* Accurate update of per-cpu counters to incore superblock
*/
-STATIC void
+void
xfs_icsb_sync_counters(
- xfs_mount_t *mp)
+ xfs_mount_t *mp,
+ int flags)
{
- xfs_icsb_sync_counters_flags(mp, 0);
+ spin_lock(&mp->m_sb_lock);
+ xfs_icsb_sync_counters_locked(mp, flags);
+ spin_unlock(&mp->m_sb_lock);
}
/*
projects / linux-2.6-omap-h63xx.git / blobdiff