#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_ag.h"
-#include "xfs_dir.h"
#include "xfs_dir2.h"
#include "xfs_dmapi.h"
#include "xfs_mount.h"
#include "xfs_bmap_btree.h"
#include "xfs_alloc_btree.h"
#include "xfs_ialloc_btree.h"
-#include "xfs_dir_sf.h"
#include "xfs_dir2_sf.h"
#include "xfs_attr_sf.h"
#include "xfs_dinode.h"
#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_uuid_mount(xfs_mount_t *);
-STATIC void xfs_uuid_unmount(xfs_mount_t *mp);
STATIC void xfs_unmountfs_wait(xfs_mount_t *);
+
+#ifdef HAVE_PERCPU_SB
+STATIC void xfs_icsb_balance_counter(xfs_mount_t *, xfs_sb_field_t,
+ int);
+STATIC void xfs_icsb_balance_counter_locked(xfs_mount_t *, xfs_sb_field_t,
+ int);
+STATIC int xfs_icsb_modify_counters(xfs_mount_t *, xfs_sb_field_t,
+ int64_t, int);
+STATIC void xfs_icsb_disable_counter(xfs_mount_t *, xfs_sb_field_t);
+
+#else
+
+#define xfs_icsb_balance_counter(mp, a, b) do { } while (0)
+#define xfs_icsb_balance_counter_locked(mp, a, b) do { } while (0)
+#define xfs_icsb_modify_counters(mp, a, b, c) do { } while (0)
+
+#endif
+
static const struct {
- short offset;
- short type; /* 0 = integer
- * 1 = binary / string (no translation)
- */
+ short offset;
+ short type; /* 0 = integer
+ * 1 = binary / string (no translation)
+ */
} xfs_sb_info[] = {
{ offsetof(xfs_sb_t, sb_magicnum), 0 },
{ offsetof(xfs_sb_t, sb_blocksize), 0 },
{ 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 }
};
/*
- * Return a pointer to an initialized xfs_mount structure.
- */
-xfs_mount_t *
-xfs_mount_init(void)
-{
- xfs_mount_t *mp;
-
- mp = kmem_zalloc(sizeof(*mp), KM_SLEEP);
-
- AIL_LOCKINIT(&mp->m_ail_lock, "xfs_ail");
- spinlock_init(&mp->m_sb_lock, "xfs_sb");
- mutex_init(&mp->m_ilock);
- initnsema(&mp->m_growlock, 1, "xfs_grow");
- /*
- * Initialize the AIL.
- */
- xfs_trans_ail_init(mp);
-
- atomic_set(&mp->m_active_trans, 0);
-
- return mp;
-}
-
-/*
* Free up the resources associated with a mount structure. Assume that
* the structure was initially zeroed, so we can tell which fields got
* initialized.
*/
-void
-xfs_mount_free(
- xfs_mount_t *mp,
- int remove_bhv)
+STATIC void
+xfs_free_perag(
+ xfs_mount_t *mp)
{
- if (mp->m_ihash)
- xfs_ihash_free(mp);
- if (mp->m_chash)
- xfs_chash_free(mp);
-
if (mp->m_perag) {
int agno;
for (agno = 0; agno < mp->m_maxagi; agno++)
if (mp->m_perag[agno].pagb_list)
- kmem_free(mp->m_perag[agno].pagb_list,
- sizeof(xfs_perag_busy_t) *
- XFS_PAGB_NUM_SLOTS);
- kmem_free(mp->m_perag,
- sizeof(xfs_perag_t) * mp->m_sb.sb_agcount);
+ kmem_free(mp->m_perag[agno].pagb_list);
+ kmem_free(mp->m_perag);
}
+}
- AIL_LOCK_DESTROY(&mp->m_ail_lock);
- spinlock_destroy(&mp->m_sb_lock);
- mutex_destroy(&mp->m_ilock);
- freesema(&mp->m_growlock);
- if (mp->m_quotainfo)
- XFS_QM_DONE(mp);
-
- if (mp->m_fsname != NULL)
- kmem_free(mp->m_fsname, mp->m_fsname_len);
- if (mp->m_rtname != NULL)
- kmem_free(mp->m_rtname, strlen(mp->m_rtname) + 1);
- if (mp->m_logname != NULL)
- kmem_free(mp->m_logname, strlen(mp->m_logname) + 1);
-
- if (remove_bhv) {
- struct vfs *vfsp = XFS_MTOVFS(mp);
-
- bhv_remove_all_vfsops(vfsp, 0);
- VFS_REMOVEBHV(vfsp, &mp->m_bhv);
- }
+/*
+ * Check size of device based on the (data/realtime) block count.
+ * Note: this check is used by the growfs code as well as mount.
+ */
+int
+xfs_sb_validate_fsb_count(
+ xfs_sb_t *sbp,
+ __uint64_t nblocks)
+{
+ ASSERT(PAGE_SHIFT >= sbp->sb_blocklog);
+ ASSERT(sbp->sb_blocklog >= BBSHIFT);
- kmem_free(mp, sizeof(xfs_mount_t));
+#if XFS_BIG_BLKNOS /* Limited by ULONG_MAX of page cache index */
+ if (nblocks >> (PAGE_CACHE_SHIFT - sbp->sb_blocklog) > ULONG_MAX)
+ return E2BIG;
+#else /* Limited by UINT_MAX of sectors */
+ if (nblocks << (sbp->sb_blocklog - BBSHIFT) > UINT_MAX)
+ return E2BIG;
+#endif
+ return 0;
}
-
/*
* Check the validity of the SB found.
*/
STATIC int
xfs_mount_validate_sb(
xfs_mount_t *mp,
- xfs_sb_t *sbp)
+ xfs_sb_t *sbp,
+ int flags)
{
/*
* If the log device and data device have the
* a volume filesystem in a non-volume manner.
*/
if (sbp->sb_magicnum != XFS_SB_MAGIC) {
- cmn_err(CE_WARN, "XFS: bad magic number");
+ xfs_fs_mount_cmn_err(flags, "bad magic number");
return XFS_ERROR(EWRONGFS);
}
- if (!XFS_SB_GOOD_VERSION(sbp)) {
- cmn_err(CE_WARN, "XFS: bad version");
+ if (!xfs_sb_good_version(sbp)) {
+ xfs_fs_mount_cmn_err(flags, "bad version");
return XFS_ERROR(EWRONGFS);
}
if (unlikely(
sbp->sb_logstart == 0 && mp->m_logdev_targp == mp->m_ddev_targp)) {
- cmn_err(CE_WARN,
- "XFS: filesystem is marked as having an external log; "
- "specify logdev on the\nmount command line.");
- XFS_CORRUPTION_ERROR("xfs_mount_validate_sb(1)",
- XFS_ERRLEVEL_HIGH, mp, sbp);
- return XFS_ERROR(EFSCORRUPTED);
+ xfs_fs_mount_cmn_err(flags,
+ "filesystem is marked as having an external log; "
+ "specify logdev on the\nmount command line.");
+ return XFS_ERROR(EINVAL);
}
if (unlikely(
sbp->sb_logstart != 0 && mp->m_logdev_targp != mp->m_ddev_targp)) {
- cmn_err(CE_WARN,
- "XFS: filesystem is marked as having an internal log; "
- "don't specify logdev on\nthe mount command line.");
- XFS_CORRUPTION_ERROR("xfs_mount_validate_sb(2)",
- XFS_ERRLEVEL_HIGH, mp, sbp);
- return XFS_ERROR(EFSCORRUPTED);
+ xfs_fs_mount_cmn_err(flags,
+ "filesystem is marked as having an internal log; "
+ "do not specify logdev on\nthe mount command line.");
+ return XFS_ERROR(EINVAL);
}
/*
sbp->sb_blocklog > XFS_MAX_BLOCKSIZE_LOG ||
sbp->sb_inodesize < XFS_DINODE_MIN_SIZE ||
sbp->sb_inodesize > XFS_DINODE_MAX_SIZE ||
+ sbp->sb_inodelog < XFS_DINODE_MIN_LOG ||
+ sbp->sb_inodelog > XFS_DINODE_MAX_LOG ||
+ (sbp->sb_blocklog - sbp->sb_inodelog != sbp->sb_inopblog) ||
(sbp->sb_rextsize * sbp->sb_blocksize > XFS_MAX_RTEXTSIZE) ||
(sbp->sb_rextsize * sbp->sb_blocksize < XFS_MIN_RTEXTSIZE) ||
- sbp->sb_imax_pct > 100)) {
- cmn_err(CE_WARN, "XFS: SB sanity check 1 failed");
- XFS_CORRUPTION_ERROR("xfs_mount_validate_sb(3)",
- XFS_ERRLEVEL_LOW, mp, sbp);
+ (sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */))) {
+ xfs_fs_mount_cmn_err(flags, "SB sanity check 1 failed");
return XFS_ERROR(EFSCORRUPTED);
}
(xfs_drfsbno_t)sbp->sb_agcount * sbp->sb_agblocks ||
sbp->sb_dblocks < (xfs_drfsbno_t)(sbp->sb_agcount - 1) *
sbp->sb_agblocks + XFS_MIN_AG_BLOCKS)) {
- cmn_err(CE_WARN, "XFS: SB sanity check 2 failed");
- XFS_ERROR_REPORT("xfs_mount_validate_sb(4)",
- XFS_ERRLEVEL_LOW, mp);
+ xfs_fs_mount_cmn_err(flags, "SB sanity check 2 failed");
return XFS_ERROR(EFSCORRUPTED);
}
- ASSERT(PAGE_SHIFT >= sbp->sb_blocklog);
- ASSERT(sbp->sb_blocklog >= BBSHIFT);
+ /*
+ * Until this is fixed only page-sized or smaller data blocks work.
+ */
+ if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) {
+ xfs_fs_mount_cmn_err(flags,
+ "file system with blocksize %d bytes",
+ sbp->sb_blocksize);
+ xfs_fs_mount_cmn_err(flags,
+ "only pagesize (%ld) or less will currently work.",
+ PAGE_SIZE);
+ return XFS_ERROR(ENOSYS);
+ }
-#if XFS_BIG_BLKNOS /* Limited by ULONG_MAX of page cache index */
- if (unlikely(
- (sbp->sb_dblocks >> (PAGE_SHIFT - sbp->sb_blocklog)) > ULONG_MAX ||
- (sbp->sb_rblocks >> (PAGE_SHIFT - sbp->sb_blocklog)) > ULONG_MAX)) {
-#else /* Limited by UINT_MAX of sectors */
- if (unlikely(
- (sbp->sb_dblocks << (sbp->sb_blocklog - BBSHIFT)) > UINT_MAX ||
- (sbp->sb_rblocks << (sbp->sb_blocklog - BBSHIFT)) > UINT_MAX)) {
-#endif
- cmn_err(CE_WARN,
- "XFS: File system is too large to be mounted on this system.");
+ if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) ||
+ xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) {
+ xfs_fs_mount_cmn_err(flags,
+ "file system too large to be mounted on this system.");
return XFS_ERROR(E2BIG);
}
if (unlikely(sbp->sb_inprogress)) {
- cmn_err(CE_WARN, "XFS: file system busy");
- XFS_ERROR_REPORT("xfs_mount_validate_sb(5)",
- XFS_ERRLEVEL_LOW, mp);
+ xfs_fs_mount_cmn_err(flags, "file system busy");
return XFS_ERROR(EFSCORRUPTED);
}
/*
* Version 1 directory format has never worked on Linux.
*/
- if (unlikely(!XFS_SB_VERSION_HASDIRV2(sbp))) {
- cmn_err(CE_WARN,
- "XFS: Attempted to mount file system using version 1 directory format");
- return XFS_ERROR(ENOSYS);
- }
-
- /*
- * Until this is fixed only page-sized or smaller data blocks work.
- */
- if (unlikely(sbp->sb_blocksize > PAGE_SIZE)) {
- cmn_err(CE_WARN,
- "XFS: Attempted to mount file system with blocksize %d bytes",
- sbp->sb_blocksize);
- cmn_err(CE_WARN,
- "XFS: Only page-sized (%ld) or less blocksizes currently work.",
- PAGE_SIZE);
+ if (unlikely(!xfs_sb_version_hasdirv2(sbp))) {
+ xfs_fs_mount_cmn_err(flags,
+ "file system using version 1 directory format");
return XFS_ERROR(ENOSYS);
}
return 0;
}
+STATIC void
+xfs_initialize_perag_icache(
+ xfs_perag_t *pag)
+{
+ if (!pag->pag_ici_init) {
+ rwlock_init(&pag->pag_ici_lock);
+ INIT_RADIX_TREE(&pag->pag_ici_root, GFP_ATOMIC);
+ pag->pag_ici_init = 1;
+ }
+}
+
xfs_agnumber_t
xfs_initialize_perag(
- struct vfs *vfs,
xfs_mount_t *mp,
xfs_agnumber_t agcount)
{
/* Clear the mount flag if no inode can overflow 32 bits
* on this filesystem, or if specifically requested..
*/
- if ((vfs->vfs_flag & VFS_32BITINODES) && ino > max_inum) {
+ if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > max_inum) {
mp->m_flags |= XFS_MOUNT_32BITINODES;
} else {
mp->m_flags &= ~XFS_MOUNT_32BITINODES;
break;
}
- /* This ag is prefered for inodes */
+ /* This ag is preferred for inodes */
pag = &mp->m_perag[index];
pag->pagi_inodeok = 1;
if (index < max_metadata)
pag->pagf_metadata = 1;
+ xfs_initialize_perag_icache(pag);
}
} else {
/* Setup default behavior for smaller filesystems */
for (index = 0; index < agcount; index++) {
pag = &mp->m_perag[index];
pag->pagi_inodeok = 1;
+ xfs_initialize_perag_icache(pag);
}
}
return index;
}
+void
+xfs_sb_from_disk(
+ xfs_sb_t *to,
+ xfs_dsb_t *from)
+{
+ to->sb_magicnum = be32_to_cpu(from->sb_magicnum);
+ to->sb_blocksize = be32_to_cpu(from->sb_blocksize);
+ to->sb_dblocks = be64_to_cpu(from->sb_dblocks);
+ to->sb_rblocks = be64_to_cpu(from->sb_rblocks);
+ to->sb_rextents = be64_to_cpu(from->sb_rextents);
+ memcpy(&to->sb_uuid, &from->sb_uuid, sizeof(to->sb_uuid));
+ to->sb_logstart = be64_to_cpu(from->sb_logstart);
+ to->sb_rootino = be64_to_cpu(from->sb_rootino);
+ to->sb_rbmino = be64_to_cpu(from->sb_rbmino);
+ to->sb_rsumino = be64_to_cpu(from->sb_rsumino);
+ to->sb_rextsize = be32_to_cpu(from->sb_rextsize);
+ to->sb_agblocks = be32_to_cpu(from->sb_agblocks);
+ to->sb_agcount = be32_to_cpu(from->sb_agcount);
+ to->sb_rbmblocks = be32_to_cpu(from->sb_rbmblocks);
+ to->sb_logblocks = be32_to_cpu(from->sb_logblocks);
+ to->sb_versionnum = be16_to_cpu(from->sb_versionnum);
+ to->sb_sectsize = be16_to_cpu(from->sb_sectsize);
+ to->sb_inodesize = be16_to_cpu(from->sb_inodesize);
+ to->sb_inopblock = be16_to_cpu(from->sb_inopblock);
+ memcpy(&to->sb_fname, &from->sb_fname, sizeof(to->sb_fname));
+ to->sb_blocklog = from->sb_blocklog;
+ to->sb_sectlog = from->sb_sectlog;
+ to->sb_inodelog = from->sb_inodelog;
+ to->sb_inopblog = from->sb_inopblog;
+ to->sb_agblklog = from->sb_agblklog;
+ to->sb_rextslog = from->sb_rextslog;
+ to->sb_inprogress = from->sb_inprogress;
+ to->sb_imax_pct = from->sb_imax_pct;
+ to->sb_icount = be64_to_cpu(from->sb_icount);
+ to->sb_ifree = be64_to_cpu(from->sb_ifree);
+ to->sb_fdblocks = be64_to_cpu(from->sb_fdblocks);
+ to->sb_frextents = be64_to_cpu(from->sb_frextents);
+ to->sb_uquotino = be64_to_cpu(from->sb_uquotino);
+ to->sb_gquotino = be64_to_cpu(from->sb_gquotino);
+ to->sb_qflags = be16_to_cpu(from->sb_qflags);
+ to->sb_flags = from->sb_flags;
+ to->sb_shared_vn = from->sb_shared_vn;
+ to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt);
+ to->sb_unit = be32_to_cpu(from->sb_unit);
+ to->sb_width = be32_to_cpu(from->sb_width);
+ to->sb_dirblklog = from->sb_dirblklog;
+ to->sb_logsectlog = from->sb_logsectlog;
+ 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_xlatesb
+ * Copy in core superblock to ondisk one.
*
- * data - on disk version of sb
- * sb - a superblock
- * dir - conversion direction: <0 - convert sb to buf
- * >0 - convert buf to sb
- * fields - which fields to copy (bitmask)
+ * The fields argument is mask of superblock fields to copy.
*/
void
-xfs_xlatesb(
- void *data,
- xfs_sb_t *sb,
- int dir,
+xfs_sb_to_disk(
+ xfs_dsb_t *to,
+ xfs_sb_t *from,
__int64_t fields)
{
- xfs_caddr_t buf_ptr;
- xfs_caddr_t mem_ptr;
+ xfs_caddr_t to_ptr = (xfs_caddr_t)to;
+ xfs_caddr_t from_ptr = (xfs_caddr_t)from;
xfs_sb_field_t f;
int first;
int size;
- ASSERT(dir);
ASSERT(fields);
-
if (!fields)
return;
- buf_ptr = (xfs_caddr_t)data;
- mem_ptr = (xfs_caddr_t)sb;
-
while (fields) {
f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields);
first = xfs_sb_info[f].offset;
ASSERT(xfs_sb_info[f].type == 0 || xfs_sb_info[f].type == 1);
if (size == 1 || xfs_sb_info[f].type == 1) {
- if (dir > 0) {
- memcpy(mem_ptr + first, buf_ptr + first, size);
- } else {
- memcpy(buf_ptr + first, mem_ptr + first, size);
- }
+ memcpy(to_ptr + first, from_ptr + first, size);
} else {
switch (size) {
case 2:
- INT_XLATE(*(__uint16_t*)(buf_ptr+first),
- *(__uint16_t*)(mem_ptr+first),
- dir, ARCH_CONVERT);
+ *(__be16 *)(to_ptr + first) =
+ cpu_to_be16(*(__u16 *)(from_ptr + first));
break;
case 4:
- INT_XLATE(*(__uint32_t*)(buf_ptr+first),
- *(__uint32_t*)(mem_ptr+first),
- dir, ARCH_CONVERT);
+ *(__be32 *)(to_ptr + first) =
+ cpu_to_be32(*(__u32 *)(from_ptr + first));
break;
case 8:
- INT_XLATE(*(__uint64_t*)(buf_ptr+first),
- *(__uint64_t*)(mem_ptr+first), dir, ARCH_CONVERT);
+ *(__be64 *)(to_ptr + first) =
+ cpu_to_be64(*(__u64 *)(from_ptr + first));
break;
default:
ASSERT(0);
* Does the initial read of the superblock.
*/
int
-xfs_readsb(xfs_mount_t *mp)
+xfs_readsb(xfs_mount_t *mp, int flags)
{
unsigned int sector_size;
unsigned int extra_flags;
xfs_buf_t *bp;
- xfs_sb_t *sbp;
int error;
ASSERT(mp->m_sb_bp == NULL);
bp = xfs_buf_read_flags(mp->m_ddev_targp, XFS_SB_DADDR,
BTOBB(sector_size), extra_flags);
if (!bp || XFS_BUF_ISERROR(bp)) {
- cmn_err(CE_WARN, "XFS: SB read failed");
+ xfs_fs_mount_cmn_err(flags, "SB read failed");
error = bp ? XFS_BUF_GETERROR(bp) : ENOMEM;
goto fail;
}
* Initialize the mount structure from the superblock.
* But first do some basic consistency checking.
*/
- sbp = XFS_BUF_TO_SBP(bp);
- xfs_xlatesb(XFS_BUF_PTR(bp), &(mp->m_sb), 1, XFS_SB_ALL_BITS);
+ xfs_sb_from_disk(&mp->m_sb, XFS_BUF_TO_SBP(bp));
- error = xfs_mount_validate_sb(mp, &(mp->m_sb));
+ error = xfs_mount_validate_sb(mp, &(mp->m_sb), flags);
if (error) {
- cmn_err(CE_WARN, "XFS: SB validate failed");
+ xfs_fs_mount_cmn_err(flags, "SB validate failed");
goto fail;
}
* We must be able to do sector-sized and sector-aligned IO.
*/
if (sector_size > mp->m_sb.sb_sectsize) {
- cmn_err(CE_WARN,
- "XFS: device supports only %u byte sectors (not %u)",
+ xfs_fs_mount_cmn_err(flags,
+ "device supports only %u byte sectors (not %u)",
sector_size, mp->m_sb.sb_sectsize);
error = ENOSYS;
goto fail;
bp = xfs_buf_read_flags(mp->m_ddev_targp, XFS_SB_DADDR,
BTOBB(sector_size), extra_flags);
if (!bp || XFS_BUF_ISERROR(bp)) {
- cmn_err(CE_WARN, "XFS: SB re-read failed");
+ xfs_fs_mount_cmn_err(flags, "SB re-read failed");
error = bp ? XFS_BUF_GETERROR(bp) : ENOMEM;
goto fail;
}
ASSERT(XFS_BUF_VALUSEMA(bp) <= 0);
}
+ /* Initialize per-cpu counters */
+ xfs_icsb_reinit_counters(mp);
+
mp->m_sb_bp = bp;
xfs_buf_relse(bp);
ASSERT(XFS_BUF_VALUSEMA(bp) > 0);
STATIC void
xfs_mount_common(xfs_mount_t *mp, xfs_sb_t *sbp)
{
- int i;
-
mp->m_agfrotor = mp->m_agirotor = 0;
- spinlock_init(&mp->m_agirotor_lock, "m_agirotor_lock");
+ spin_lock_init(&mp->m_agirotor_lock);
mp->m_maxagi = mp->m_sb.sb_agcount;
mp->m_blkbit_log = sbp->sb_blocklog + XFS_NBBYLOG;
mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT;
mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT;
mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1;
mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog;
- mp->m_litino = sbp->sb_inodesize -
- ((uint)sizeof(xfs_dinode_core_t) + (uint)sizeof(xfs_agino_t));
+ mp->m_litino = sbp->sb_inodesize - sizeof(struct xfs_dinode);
mp->m_blockmask = sbp->sb_blocksize - 1;
mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG;
mp->m_blockwmask = mp->m_blockwsize - 1;
- INIT_LIST_HEAD(&mp->m_del_inodes);
/*
* Setup for attributes, in case they get created.
}
ASSERT(mp->m_attroffset < XFS_LITINO(mp));
- for (i = 0; i < 2; i++) {
- mp->m_alloc_mxr[i] = XFS_BTREE_BLOCK_MAXRECS(sbp->sb_blocksize,
- xfs_alloc, i == 0);
- mp->m_alloc_mnr[i] = XFS_BTREE_BLOCK_MINRECS(sbp->sb_blocksize,
- xfs_alloc, i == 0);
- }
- for (i = 0; i < 2; i++) {
- mp->m_bmap_dmxr[i] = XFS_BTREE_BLOCK_MAXRECS(sbp->sb_blocksize,
- xfs_bmbt, i == 0);
- mp->m_bmap_dmnr[i] = XFS_BTREE_BLOCK_MINRECS(sbp->sb_blocksize,
- xfs_bmbt, i == 0);
- }
- for (i = 0; i < 2; i++) {
- mp->m_inobt_mxr[i] = XFS_BTREE_BLOCK_MAXRECS(sbp->sb_blocksize,
- xfs_inobt, i == 0);
- mp->m_inobt_mnr[i] = XFS_BTREE_BLOCK_MINRECS(sbp->sb_blocksize,
- xfs_inobt, i == 0);
- }
+ mp->m_alloc_mxr[0] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 1);
+ mp->m_alloc_mxr[1] = xfs_allocbt_maxrecs(mp, sbp->sb_blocksize, 0);
+ mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2;
+ mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2;
+
+ mp->m_inobt_mxr[0] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 1);
+ mp->m_inobt_mxr[1] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 0);
+ mp->m_inobt_mnr[0] = mp->m_inobt_mxr[0] / 2;
+ mp->m_inobt_mnr[1] = mp->m_inobt_mxr[1] / 2;
+
+ mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1);
+ mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0);
+ mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2;
+ mp->m_bmap_dmnr[1] = mp->m_bmap_dmxr[1] / 2;
mp->m_bsize = XFS_FSB_TO_BB(mp, 1);
mp->m_ialloc_inos = (int)MAX((__uint16_t)XFS_INODES_PER_CHUNK,
sbp->sb_inopblock);
mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog;
}
+
/*
- * xfs_mountfs
+ * xfs_initialize_perag_data
*
- * This function does the following on an initial mount of a file system:
- * - reads the superblock from disk and init the mount struct
- * - if we're a 32-bit kernel, do a size check on the superblock
- * so we don't mount terabyte filesystems
- * - init mount struct realtime fields
- * - allocate inode hash table for fs
- * - init directory manager
- * - perform recovery and init the log manager
+ * Read in each per-ag structure so we can count up the number of
+ * allocated inodes, free inodes and used filesystem blocks as this
+ * information is no longer persistent in the superblock. Once we have
+ * this information, write it into the in-core superblock structure.
*/
-int
-xfs_mountfs(
- vfs_t *vfsp,
- xfs_mount_t *mp,
- int mfsi_flags)
+STATIC int
+xfs_initialize_perag_data(xfs_mount_t *mp, xfs_agnumber_t agcount)
{
- xfs_buf_t *bp;
- xfs_sb_t *sbp = &(mp->m_sb);
- xfs_inode_t *rip;
- vnode_t *rvp = NULL;
- int readio_log, writeio_log;
- xfs_daddr_t d;
- __uint64_t ret64;
- __int64_t update_flags;
- uint quotamount, quotaflags;
- int agno;
- int uuid_mounted = 0;
- int error = 0;
+ xfs_agnumber_t index;
+ xfs_perag_t *pag;
+ xfs_sb_t *sbp = &mp->m_sb;
+ uint64_t ifree = 0;
+ uint64_t ialloc = 0;
+ uint64_t bfree = 0;
+ uint64_t bfreelst = 0;
+ uint64_t btree = 0;
+ int error;
- if (mp->m_sb_bp == NULL) {
- if ((error = xfs_readsb(mp))) {
- return (error);
- }
- }
- xfs_mount_common(mp, sbp);
+ for (index = 0; index < agcount; index++) {
+ /*
+ * read the agf, then the agi. This gets us
+ * all the inforamtion we need and populates the
+ * per-ag structures for us.
+ */
+ error = xfs_alloc_pagf_init(mp, NULL, index, 0);
+ if (error)
+ return error;
+ error = xfs_ialloc_pagi_init(mp, NULL, index);
+ if (error)
+ return error;
+ pag = &mp->m_perag[index];
+ ifree += pag->pagi_freecount;
+ ialloc += pag->pagi_count;
+ bfree += pag->pagf_freeblks;
+ bfreelst += pag->pagf_flcount;
+ btree += pag->pagf_btreeblks;
+ }
/*
- * Check if sb_agblocks is aligned at stripe boundary
- * If sb_agblocks is NOT aligned turn off m_dalign since
- * allocator alignment is within an ag, therefore ag has
- * to be aligned at stripe boundary.
+ * Overwrite incore superblock counters with just-read data
*/
- update_flags = 0LL;
- if (mp->m_dalign && !(mfsi_flags & XFS_MFSI_SECOND)) {
+ spin_lock(&mp->m_sb_lock);
+ sbp->sb_ifree = ifree;
+ sbp->sb_icount = ialloc;
+ sbp->sb_fdblocks = bfree + bfreelst + btree;
+ spin_unlock(&mp->m_sb_lock);
+
+ /* Fixup the per-cpu counters as well. */
+ xfs_icsb_reinit_counters(mp);
+
+ return 0;
+}
+
+/*
+ * Update alignment values based on mount options and sb values
+ */
+STATIC int
+xfs_update_alignment(xfs_mount_t *mp)
+{
+ xfs_sb_t *sbp = &(mp->m_sb);
+
+ if (mp->m_dalign) {
/*
* If stripe unit and stripe width are not multiples
* of the fs blocksize turn off alignment.
if (mp->m_flags & XFS_MOUNT_RETERR) {
cmn_err(CE_WARN,
"XFS: alignment check 1 failed");
- error = XFS_ERROR(EINVAL);
- goto error1;
+ return XFS_ERROR(EINVAL);
}
mp->m_dalign = mp->m_swidth = 0;
} else {
mp->m_dalign = XFS_BB_TO_FSBT(mp, mp->m_dalign);
if (mp->m_dalign && (sbp->sb_agblocks % mp->m_dalign)) {
if (mp->m_flags & XFS_MOUNT_RETERR) {
- error = XFS_ERROR(EINVAL);
- goto error1;
+ return XFS_ERROR(EINVAL);
}
xfs_fs_cmn_err(CE_WARN, mp,
"stripe alignment turned off: sunit(%d)/swidth(%d) incompatible with agsize(%d)",
"stripe alignment turned off: sunit(%d) less than bsize(%d)",
mp->m_dalign,
mp->m_blockmask +1);
- error = XFS_ERROR(EINVAL);
- goto error1;
+ return XFS_ERROR(EINVAL);
}
mp->m_swidth = 0;
}
* Update superblock with new values
* and log changes
*/
- if (XFS_SB_VERSION_HASDALIGN(sbp)) {
+ if (xfs_sb_version_hasdalign(sbp)) {
if (sbp->sb_unit != mp->m_dalign) {
sbp->sb_unit = mp->m_dalign;
- update_flags |= XFS_SB_UNIT;
+ mp->m_update_flags |= XFS_SB_UNIT;
}
if (sbp->sb_width != mp->m_swidth) {
sbp->sb_width = mp->m_swidth;
- update_flags |= XFS_SB_WIDTH;
+ mp->m_update_flags |= XFS_SB_WIDTH;
}
}
} else if ((mp->m_flags & XFS_MOUNT_NOALIGN) != XFS_MOUNT_NOALIGN &&
- XFS_SB_VERSION_HASDALIGN(&mp->m_sb)) {
+ xfs_sb_version_hasdalign(&mp->m_sb)) {
mp->m_dalign = sbp->sb_unit;
mp->m_swidth = sbp->sb_width;
}
- xfs_alloc_compute_maxlevels(mp);
- xfs_bmap_compute_maxlevels(mp, XFS_DATA_FORK);
- xfs_bmap_compute_maxlevels(mp, XFS_ATTR_FORK);
- xfs_ialloc_compute_maxlevels(mp);
+ return 0;
+}
- if (sbp->sb_imax_pct) {
- __uint64_t icount;
+/*
+ * Set the maximum inode count for this filesystem
+ */
+STATIC void
+xfs_set_maxicount(xfs_mount_t *mp)
+{
+ xfs_sb_t *sbp = &(mp->m_sb);
+ __uint64_t icount;
- /* Make sure the maximum inode count is a multiple of the
- * units we allocate inodes in.
+ if (sbp->sb_imax_pct) {
+ /*
+ * Make sure the maximum inode count is a multiple
+ * of the units we allocate inodes in.
*/
-
icount = sbp->sb_dblocks * sbp->sb_imax_pct;
do_div(icount, 100);
do_div(icount, mp->m_ialloc_blks);
mp->m_maxicount = (icount * mp->m_ialloc_blks) <<
sbp->sb_inopblog;
- } else
+ } else {
mp->m_maxicount = 0;
-
- mp->m_maxioffset = xfs_max_file_offset(sbp->sb_blocklog);
-
- /*
- * XFS uses the uuid from the superblock as the unique
- * identifier for fsid. We can not use the uuid from the volume
- * since a single partition filesystem is identical to a single
- * partition volume/filesystem.
- */
- if ((mfsi_flags & XFS_MFSI_SECOND) == 0 &&
- (mp->m_flags & XFS_MOUNT_NOUUID) == 0) {
- if (xfs_uuid_mount(mp)) {
- error = XFS_ERROR(EINVAL);
- goto error1;
- }
- uuid_mounted=1;
- ret64 = uuid_hash64(&sbp->sb_uuid);
- memcpy(&vfsp->vfs_fsid, &ret64, sizeof(ret64));
}
+}
+
+/*
+ * Set the default minimum read and write sizes unless
+ * already specified in a mount option.
+ * We use smaller I/O sizes when the file system
+ * is being used for NFS service (wsync mount option).
+ */
+STATIC void
+xfs_set_rw_sizes(xfs_mount_t *mp)
+{
+ xfs_sb_t *sbp = &(mp->m_sb);
+ int readio_log, writeio_log;
- /*
- * Set the default minimum read and write sizes unless
- * already specified in a mount option.
- * We use smaller I/O sizes when the file system
- * is being used for NFS service (wsync mount option).
- */
if (!(mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)) {
if (mp->m_flags & XFS_MOUNT_WSYNC) {
readio_log = XFS_WSYNC_READIO_LOG;
writeio_log = mp->m_writeio_log;
}
- /*
- * Set the number of readahead buffers to use based on
- * physical memory size.
- */
- if (xfs_physmem <= 4096) /* <= 16MB */
- mp->m_nreadaheads = XFS_RW_NREADAHEAD_16MB;
- else if (xfs_physmem <= 8192) /* <= 32MB */
- mp->m_nreadaheads = XFS_RW_NREADAHEAD_32MB;
- else
- mp->m_nreadaheads = XFS_RW_NREADAHEAD_K32;
if (sbp->sb_blocklog > readio_log) {
mp->m_readio_log = sbp->sb_blocklog;
} else {
mp->m_writeio_log = writeio_log;
}
mp->m_writeio_blocks = 1 << (mp->m_writeio_log - sbp->sb_blocklog);
+}
- /*
- * Set the inode cluster size based on the physical memory
- * size. This may still be overridden by the file system
- * block size if it is larger than the chosen cluster size.
- */
- if (xfs_physmem <= btoc(32 * 1024 * 1024)) { /* <= 32 MB */
- mp->m_inode_cluster_size = XFS_INODE_SMALL_CLUSTER_SIZE;
- } else {
- mp->m_inode_cluster_size = XFS_INODE_BIG_CLUSTER_SIZE;
- }
- /*
- * Set whether we're using inode alignment.
- */
- if (XFS_SB_VERSION_HASALIGN(&mp->m_sb) &&
+/*
+ * Set whether we're using inode alignment.
+ */
+STATIC void
+xfs_set_inoalignment(xfs_mount_t *mp)
+{
+ if (xfs_sb_version_hasalign(&mp->m_sb) &&
mp->m_sb.sb_inoalignmt >=
XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size))
mp->m_inoalign_mask = mp->m_sb.sb_inoalignmt - 1;
mp->m_sinoalign = mp->m_dalign;
else
mp->m_sinoalign = 0;
- /*
- * Check that the data (and log if separate) are an ok size.
- */
+}
+
+/*
+ * Check that the data (and log if separate) are an ok size.
+ */
+STATIC int
+xfs_check_sizes(xfs_mount_t *mp)
+{
+ xfs_buf_t *bp;
+ xfs_daddr_t d;
+ int error;
+
d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks);
if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_dblocks) {
cmn_err(CE_WARN, "XFS: size check 1 failed");
- error = XFS_ERROR(E2BIG);
- goto error1;
+ return XFS_ERROR(E2BIG);
}
error = xfs_read_buf(mp, mp->m_ddev_targp,
d - XFS_FSS_TO_BB(mp, 1),
xfs_buf_relse(bp);
} else {
cmn_err(CE_WARN, "XFS: size check 2 failed");
- if (error == ENOSPC) {
+ if (error == ENOSPC)
error = XFS_ERROR(E2BIG);
- }
- goto error1;
+ return error;
}
- if (((mfsi_flags & XFS_MFSI_CLIENT) == 0) &&
- mp->m_logdev_targp != mp->m_ddev_targp) {
+ if (mp->m_logdev_targp != mp->m_ddev_targp) {
d = (xfs_daddr_t)XFS_FSB_TO_BB(mp, mp->m_sb.sb_logblocks);
if (XFS_BB_TO_FSB(mp, d) != mp->m_sb.sb_logblocks) {
cmn_err(CE_WARN, "XFS: size check 3 failed");
- error = XFS_ERROR(E2BIG);
- goto error1;
+ return XFS_ERROR(E2BIG);
}
error = xfs_read_buf(mp, mp->m_logdev_targp,
d - XFS_FSB_TO_BB(mp, 1),
xfs_buf_relse(bp);
} else {
cmn_err(CE_WARN, "XFS: size check 3 failed");
- if (error == ENOSPC) {
+ if (error == ENOSPC)
error = XFS_ERROR(E2BIG);
- }
- goto error1;
+ return error;
}
}
+ return 0;
+}
- /*
- * Initialize realtime fields in the mount structure
- */
- if ((error = xfs_rtmount_init(mp))) {
- cmn_err(CE_WARN, "XFS: RT mount failed");
- goto error1;
- }
+/*
+ * This function does the following on an initial mount of a file system:
+ * - reads the superblock from disk and init the mount struct
+ * - if we're a 32-bit kernel, do a size check on the superblock
+ * so we don't mount terabyte filesystems
+ * - init mount struct realtime fields
+ * - allocate inode hash table for fs
+ * - init directory manager
+ * - perform recovery and init the log manager
+ */
+int
+xfs_mountfs(
+ xfs_mount_t *mp)
+{
+ xfs_sb_t *sbp = &(mp->m_sb);
+ xfs_inode_t *rip;
+ __uint64_t resblks;
+ uint quotamount, quotaflags;
+ int error = 0;
+
+ xfs_mount_common(mp, sbp);
/*
- * For client case we are done now
+ * 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 (mfsi_flags & XFS_MFSI_CLIENT) {
- return(0);
+ 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;
+ mp->m_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_NOATTR2))
+ mp->m_flags |= XFS_MOUNT_ATTR2;
}
- /*
- * Copies the low order bits of the timestamp and the randomly
- * set "sequence" number out of a UUID.
- */
- uuid_getnodeuniq(&sbp->sb_uuid, mp->m_fixedfsid);
+ if (xfs_sb_version_hasattr2(&mp->m_sb) &&
+ (mp->m_flags & XFS_MOUNT_NOATTR2)) {
+ xfs_sb_version_removeattr2(&mp->m_sb);
+ mp->m_update_flags |= XFS_SB_FEATURES2;
+
+ /* update sb_versionnum for the clearing of the morebits */
+ if (!sbp->sb_features2)
+ mp->m_update_flags |= XFS_SB_VERSIONNUM;
+ }
/*
- * The vfs structure needs to have a file system independent
- * way of checking for the invariant file system ID. Since it
- * can't look at mount structures it has a pointer to the data
- * in the mount structure.
- *
- * File systems that don't support user level file handles (i.e.
- * all of them except for XFS) will leave vfs_altfsid as NULL.
+ * Check if sb_agblocks is aligned at stripe boundary
+ * If sb_agblocks is NOT aligned turn off m_dalign since
+ * allocator alignment is within an ag, therefore ag has
+ * to be aligned at stripe boundary.
*/
- vfsp->vfs_altfsid = (xfs_fsid_t *)mp->m_fixedfsid;
- mp->m_dmevmask = 0; /* not persistent; set after each mount */
+ error = xfs_update_alignment(mp);
+ if (error)
+ goto out;
+
+ xfs_alloc_compute_maxlevels(mp);
+ xfs_bmap_compute_maxlevels(mp, XFS_DATA_FORK);
+ xfs_bmap_compute_maxlevels(mp, XFS_ATTR_FORK);
+ xfs_ialloc_compute_maxlevels(mp);
+
+ xfs_set_maxicount(mp);
+
+ mp->m_maxioffset = xfs_max_file_offset(sbp->sb_blocklog);
+
+ /*
+ * XFS uses the uuid from the superblock as the unique
+ * identifier for fsid. We can not use the uuid from the volume
+ * since a single partition filesystem is identical to a single
+ * partition volume/filesystem.
+ */
+ if (!(mp->m_flags & XFS_MOUNT_NOUUID)) {
+ if (xfs_uuid_mount(mp)) {
+ error = XFS_ERROR(EINVAL);
+ goto out;
+ }
+ }
+
+ /*
+ * Set the minimum read and write sizes
+ */
+ xfs_set_rw_sizes(mp);
+
+ /*
+ * Set the inode cluster size.
+ * This may still be overridden by the file system
+ * block size if it is larger than the chosen cluster size.
+ */
+ mp->m_inode_cluster_size = XFS_INODE_BIG_CLUSTER_SIZE;
/*
- * Select the right directory manager.
+ * Set inode alignment fields
*/
- mp->m_dirops =
- XFS_SB_VERSION_HASDIRV2(&mp->m_sb) ?
- xfsv2_dirops :
- xfsv1_dirops;
+ xfs_set_inoalignment(mp);
/*
- * Initialize directory manager's entries.
+ * Check that the data (and log if separate) are an ok size.
*/
- XFS_DIR_MOUNT(mp);
+ error = xfs_check_sizes(mp);
+ if (error)
+ goto out_remove_uuid;
+
+ /*
+ * Initialize realtime fields in the mount structure
+ */
+ error = xfs_rtmount_init(mp);
+ if (error) {
+ cmn_err(CE_WARN, "XFS: RT mount failed");
+ goto out_remove_uuid;
+ }
+
+ /*
+ * Copies the low order bits of the timestamp and the randomly
+ * set "sequence" number out of a UUID.
+ */
+ uuid_getnodeuniq(&sbp->sb_uuid, mp->m_fixedfsid);
+
+ mp->m_dmevmask = 0; /* not persistent; set after each mount */
+
+ xfs_dir_mount(mp);
/*
* Initialize the attribute manager's entries.
xfs_trans_init(mp);
/*
- * Allocate and initialize the inode hash table for this
- * file system.
- */
- xfs_ihash_init(mp);
- xfs_chash_init(mp);
-
- /*
* Allocate and initialize the per-ag data.
*/
init_rwsem(&mp->m_peraglock);
- mp->m_perag =
- kmem_zalloc(sbp->sb_agcount * sizeof(xfs_perag_t), KM_SLEEP);
+ mp->m_perag = kmem_zalloc(sbp->sb_agcount * sizeof(xfs_perag_t),
+ KM_MAYFAIL);
+ if (!mp->m_perag)
+ goto out_remove_uuid;
+
+ mp->m_maxagi = xfs_initialize_perag(mp, sbp->sb_agcount);
- mp->m_maxagi = xfs_initialize_perag(vfsp, mp, sbp->sb_agcount);
+ if (!sbp->sb_logblocks) {
+ cmn_err(CE_WARN, "XFS: no log defined");
+ XFS_ERROR_REPORT("xfs_mountfs", XFS_ERRLEVEL_LOW, mp);
+ error = XFS_ERROR(EFSCORRUPTED);
+ goto out_free_perag;
+ }
/*
* log's mount-time initialization. Perform 1st part recovery if needed
*/
- if (likely(sbp->sb_logblocks > 0)) { /* check for volume case */
- error = xfs_log_mount(mp, mp->m_logdev_targp,
- XFS_FSB_TO_DADDR(mp, sbp->sb_logstart),
- XFS_FSB_TO_BB(mp, sbp->sb_logblocks));
- if (error) {
- cmn_err(CE_WARN, "XFS: log mount failed");
- goto error2;
- }
- } else { /* No log has been defined */
- cmn_err(CE_WARN, "XFS: no log defined");
- XFS_ERROR_REPORT("xfs_mountfs_int(1)", XFS_ERRLEVEL_LOW, mp);
- error = XFS_ERROR(EFSCORRUPTED);
- goto error2;
+ error = xfs_log_mount(mp, mp->m_logdev_targp,
+ XFS_FSB_TO_DADDR(mp, sbp->sb_logstart),
+ XFS_FSB_TO_BB(mp, sbp->sb_logblocks));
+ if (error) {
+ cmn_err(CE_WARN, "XFS: log mount failed");
+ goto out_free_perag;
+ }
+
+ /*
+ * Now the log is mounted, we know if it was an unclean shutdown or
+ * not. If it was, with the first phase of recovery has completed, we
+ * have consistent AG blocks on disk. We have not recovered EFIs yet,
+ * but they are recovered transactionally in the second recovery phase
+ * later.
+ *
+ * Hence we can safely re-initialise incore superblock counters from
+ * the per-ag data. These may not be correct if the filesystem was not
+ * cleanly unmounted, so we need to wait for recovery to finish before
+ * doing this.
+ *
+ * If the filesystem was cleanly unmounted, then we can trust the
+ * values in the superblock to be correct and we don't need to do
+ * anything here.
+ *
+ * If we are currently making the filesystem, the initialisation will
+ * fail as the perag data is in an undefined state.
+ */
+ if (xfs_sb_version_haslazysbcount(&mp->m_sb) &&
+ !XFS_LAST_UNMOUNT_WAS_CLEAN(mp) &&
+ !mp->m_sb.sb_inprogress) {
+ error = xfs_initialize_perag_data(mp, sbp->sb_agcount);
+ if (error)
+ goto out_free_perag;
}
/*
error = xfs_iget(mp, NULL, sbp->sb_rootino, 0, XFS_ILOCK_EXCL, &rip, 0);
if (error) {
cmn_err(CE_WARN, "XFS: failed to read root inode");
- goto error3;
+ goto out_log_dealloc;
}
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");
- prdev("Root inode %llu is not a directory",
- mp->m_ddev_targp, (unsigned long long)rip->i_ino);
+ cmn_err(CE_WARN, "Device %s - root %llu is not a directory",
+ XFS_BUFTARG_NAME(mp->m_ddev_targp),
+ (unsigned long long)rip->i_ino);
xfs_iunlock(rip, XFS_ILOCK_EXCL);
XFS_ERROR_REPORT("xfs_mountfs_int(2)", XFS_ERRLEVEL_LOW,
mp);
error = XFS_ERROR(EFSCORRUPTED);
- goto error4;
+ goto out_rele_rip;
}
mp->m_rootip = rip; /* save it */
/*
* Initialize realtime inode pointers in the mount structure
*/
- if ((error = xfs_rtmount_inodes(mp))) {
+ error = xfs_rtmount_inodes(mp);
+ if (error) {
/*
* Free up the root inode.
*/
cmn_err(CE_WARN, "XFS: failed to read RT inodes");
- goto error4;
+ goto out_rele_rip;
}
/*
- * If fs is not mounted readonly, then update the superblock
- * unit and width changes.
+ * If this is a read-only mount defer the superblock updates until
+ * the next remount into writeable mode. Otherwise we would never
+ * perform the update e.g. for the root filesystem.
*/
- if (update_flags && !(vfsp->vfs_flag & VFS_RDONLY))
- xfs_mount_log_sbunit(mp, update_flags);
+ if (mp->m_update_flags && !(mp->m_flags & XFS_MOUNT_RDONLY)) {
+ error = xfs_mount_log_sb(mp, mp->m_update_flags);
+ if (error) {
+ cmn_err(CE_WARN, "XFS: failed to write sb changes");
+ goto out_rtunmount;
+ }
+ }
/*
* Initialise the XFS quota management subsystem for this mount
*/
- if ((error = XFS_QM_INIT(mp, "amount, "aflags)))
- goto error4;
+ error = XFS_QM_INIT(mp, "amount, "aflags);
+ if (error)
+ goto out_rtunmount;
/*
* Finish recovering the file system. This part needed to be
* delayed until after the root and real-time bitmap inodes
* were consistently read in.
*/
- error = xfs_log_mount_finish(mp, mfsi_flags);
+ error = xfs_log_mount_finish(mp);
if (error) {
cmn_err(CE_WARN, "XFS: log mount finish failed");
- goto error4;
+ goto out_rtunmount;
}
/*
* Complete the quota initialisation, post-log-replay component.
*/
- if ((error = XFS_QM_MOUNT(mp, quotamount, quotaflags, mfsi_flags)))
- goto error4;
-
- return 0;
+ error = XFS_QM_MOUNT(mp, quotamount, quotaflags);
+ if (error)
+ goto out_rtunmount;
- error4:
/*
- * Free up the root inode.
+ * Now we are mounted, reserve a small amount of unused space for
+ * privileged transactions. This is needed so that transaction
+ * space required for critical operations can dip into this pool
+ * when at ENOSPC. This is needed for operations like create with
+ * attr, unwritten extent conversion at ENOSPC, etc. Data allocations
+ * are not allowed to use this reserved space.
+ *
+ * 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. Warn if this occurs.
*/
- VN_RELE(rvp);
- error3:
+ resblks = mp->m_sb.sb_dblocks;
+ do_div(resblks, 20);
+ resblks = min_t(__uint64_t, resblks, 1024);
+ 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;
+
+ out_rtunmount:
+ xfs_rtunmount_inodes(mp);
+ out_rele_rip:
+ IRELE(rip);
+ out_log_dealloc:
xfs_log_unmount_dealloc(mp);
- error2:
- xfs_ihash_free(mp);
- xfs_chash_free(mp);
- for (agno = 0; agno < sbp->sb_agcount; agno++)
- if (mp->m_perag[agno].pagb_list)
- kmem_free(mp->m_perag[agno].pagb_list,
- sizeof(xfs_perag_busy_t) * XFS_PAGB_NUM_SLOTS);
- kmem_free(mp->m_perag, sbp->sb_agcount * sizeof(xfs_perag_t));
- mp->m_perag = NULL;
- /* FALLTHROUGH */
- error1:
- if (uuid_mounted)
- xfs_uuid_unmount(mp);
- xfs_freesb(mp);
+ out_free_perag:
+ xfs_free_perag(mp);
+ out_remove_uuid:
+ if (!(mp->m_flags & XFS_MOUNT_NOUUID))
+ uuid_table_remove(&mp->m_sb.sb_uuid);
+ out:
return error;
}
/*
- * xfs_unmountfs
- *
* This flushes out the inodes,dquots and the superblock, unmounts the
* log and makes sure that incore structures are freed.
*/
-int
-xfs_unmountfs(xfs_mount_t *mp, struct cred *cr)
+void
+xfs_unmountfs(
+ struct xfs_mount *mp)
{
- struct vfs *vfsp = XFS_MTOVFS(mp);
-#if defined(DEBUG) || defined(INDUCE_IO_ERROR)
- int64_t fsid;
-#endif
+ __uint64_t resblks;
+ int error;
- xfs_iflush_all(mp);
+ /*
+ * Release dquot that rootinode, rbmino and rsumino might be holding,
+ * and release the quota inodes.
+ */
+ XFS_QM_UNMOUNT(mp);
- XFS_QM_DQPURGEALL(mp,
- XFS_QMOPT_UQUOTA | XFS_QMOPT_GQUOTA | XFS_QMOPT_UMOUNTING);
+ xfs_rtunmount_inodes(mp);
+ IRELE(mp->m_rootip);
+
+ /*
+ * We can potentially deadlock here if we have an inode cluster
+ * that has been freed has it's buffer still pinned in memory because
+ * the transaction is still sitting in a iclog. The stale inodes
+ * on that buffer will have their flush locks held until the
+ * transaction hits the disk and the callbacks run. the inode
+ * flush takes the flush lock unconditionally and with nothing to
+ * push out the iclog we will never get that unlocked. hence we
+ * need to force the log first.
+ */
+ xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
+ xfs_reclaim_inodes(mp, 0, XFS_IFLUSH_ASYNC);
+
+ XFS_QM_DQPURGEALL(mp, XFS_QMOPT_QUOTALL | XFS_QMOPT_UMOUNTING);
+
+ if (mp->m_quotainfo)
+ XFS_QM_DONE(mp);
/*
* Flush out the log synchronously so that we know for sure
xfs_binval(mp->m_rtdev_targp);
}
+ /*
+ * Unreserve any blocks we have so that when we unmount we don't account
+ * the reserved free space as used. This is really only necessary for
+ * lazy superblock counting because it trusts the incore superblock
+ * counters to be aboslutely correct on clean unmount.
+ *
+ * We don't bother correcting this elsewhere for lazy superblock
+ * counting because on mount of an unclean filesystem we reconstruct the
+ * correct counter value and this is irrelevant.
+ *
+ * For non-lazy counter filesystems, this doesn't matter at all because
+ * we only every apply deltas to the superblock and hence the incore
+ * value does not matter....
+ */
+ resblks = 0;
+ 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.");
+
+ 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. */
- xfs_freesb(mp);
-
- /*
- * All inodes from this mount point should be freed.
- */
- ASSERT(mp->m_inodes == NULL);
-
- xfs_unmountfs_close(mp, cr);
if ((mp->m_flags & XFS_MOUNT_NOUUID) == 0)
- xfs_uuid_unmount(mp);
+ uuid_table_remove(&mp->m_sb.sb_uuid);
-#if defined(DEBUG) || defined(INDUCE_IO_ERROR)
- /*
- * clear all error tags on this filesystem
- */
- memcpy(&fsid, &vfsp->vfs_fsid, sizeof(int64_t));
- xfs_errortag_clearall_umount(fsid, mp->m_fsname, 0);
+#if defined(DEBUG)
+ xfs_errortag_clearall(mp, 0);
#endif
- XFS_IODONE(vfsp);
- xfs_mount_free(mp, 1);
- return 0;
-}
-
-void
-xfs_unmountfs_close(xfs_mount_t *mp, struct cred *cr)
-{
- if (mp->m_logdev_targp != mp->m_ddev_targp)
- xfs_free_buftarg(mp->m_logdev_targp, 1);
- if (mp->m_rtdev_targp)
- xfs_free_buftarg(mp->m_rtdev_targp, 1);
- xfs_free_buftarg(mp->m_ddev_targp, 0);
+ xfs_free_perag(mp);
}
STATIC void
}
int
+xfs_fs_writable(xfs_mount_t *mp)
+{
+ return !(xfs_test_for_freeze(mp) || XFS_FORCED_SHUTDOWN(mp) ||
+ (mp->m_flags & XFS_MOUNT_RDONLY));
+}
+
+/*
+ * xfs_log_sbcount
+ *
+ * Called either periodically to keep the on disk superblock values
+ * roughly up to date or from unmount to make sure the values are
+ * correct on a clean unmount.
+ *
+ * Note this code can be called during the process of freezing, so
+ * we may need to use the transaction allocator which does not not
+ * block when the transaction subsystem is in its frozen state.
+ */
+int
+xfs_log_sbcount(
+ xfs_mount_t *mp,
+ uint sync)
+{
+ xfs_trans_t *tp;
+ int error;
+
+ if (!xfs_fs_writable(mp))
+ return 0;
+
+ xfs_icsb_sync_counters(mp, 0);
+
+ /*
+ * we don't need to do this if we are updating the superblock
+ * counters on every modification.
+ */
+ if (!xfs_sb_version_haslazysbcount(&mp->m_sb))
+ return 0;
+
+ tp = _xfs_trans_alloc(mp, XFS_TRANS_SB_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 error;
+ }
+
+ xfs_mod_sb(tp, XFS_SB_IFREE | XFS_SB_ICOUNT | XFS_SB_FDBLOCKS);
+ if (sync)
+ xfs_trans_set_sync(tp);
+ error = xfs_trans_commit(tp, 0);
+ return error;
+}
+
+int
xfs_unmountfs_writesb(xfs_mount_t *mp)
{
xfs_buf_t *sbp;
- xfs_sb_t *sb;
int error = 0;
/*
* skip superblock write if fs is read-only, or
* if we are doing a forced umount.
*/
- sbp = xfs_getsb(mp, 0);
- if (!(XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY ||
+ if (!((mp->m_flags & XFS_MOUNT_RDONLY) ||
XFS_FORCED_SHUTDOWN(mp))) {
- /*
- * mark shared-readonly if desired
- */
- sb = XFS_BUF_TO_SBP(sbp);
- if (mp->m_mk_sharedro) {
- if (!(sb->sb_flags & XFS_SBF_READONLY))
- sb->sb_flags |= XFS_SBF_READONLY;
- if (!XFS_SB_VERSION_HASSHARED(sb))
- XFS_SB_VERSION_ADDSHARED(sb);
- xfs_fs_cmn_err(CE_NOTE, mp,
- "Unmounting, marking shared read-only");
- }
+
+ sbp = xfs_getsb(mp, 0);
+
XFS_BUF_UNDONE(sbp);
XFS_BUF_UNREAD(sbp);
XFS_BUF_UNDELAYWRITE(sbp);
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",
mp, sbp, XFS_BUF_ADDR(sbp));
- if (error && mp->m_mk_sharedro)
- xfs_fs_cmn_err(CE_ALERT, mp, "Superblock write error detected while unmounting. Filesystem may not be marked shared readonly");
+ xfs_buf_relse(sbp);
}
- xfs_buf_relse(sbp);
- return (error);
+ return error;
}
/*
int first;
int last;
xfs_mount_t *mp;
- xfs_sb_t *sbp;
xfs_sb_field_t f;
ASSERT(fields);
return;
mp = tp->t_mountp;
bp = xfs_trans_getsb(tp, mp, 0);
- sbp = XFS_BUF_TO_SBP(bp);
first = sizeof(xfs_sb_t);
last = 0;
/* translate/copy */
- xfs_xlatesb(XFS_BUF_PTR(bp), &(mp->m_sb), -1, fields);
+ xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb, fields);
/* find modified range */
xfs_trans_log_buf(tp, bp, first, last);
}
+
/*
* xfs_mod_incore_sb_unlocked() is a utility routine common used to apply
* a delta to a specified field in the in-core superblock. Simply
* Fields are not allowed to dip below zero, so if the delta would
* do this do not apply it and return EINVAL.
*
- * The SB_LOCK must be held when this routine is called.
+ * The m_sb_lock must be held when this routine is called.
*/
-STATIC int
-xfs_mod_incore_sb_unlocked(xfs_mount_t *mp, xfs_sb_field_t field,
- int delta, int rsvd)
+int
+xfs_mod_incore_sb_unlocked(
+ xfs_mount_t *mp,
+ xfs_sb_field_t field,
+ int64_t delta,
+ int rsvd)
{
int scounter; /* short counter for 32 bit fields */
long long lcounter; /* long counter for 64 bit fields */
lcounter += delta;
if (lcounter < 0) {
ASSERT(0);
- return (XFS_ERROR(EINVAL));
+ return XFS_ERROR(EINVAL);
}
mp->m_sb.sb_icount = lcounter;
- return (0);
+ return 0;
case XFS_SBS_IFREE:
lcounter = (long long)mp->m_sb.sb_ifree;
lcounter += delta;
if (lcounter < 0) {
ASSERT(0);
- return (XFS_ERROR(EINVAL));
+ return XFS_ERROR(EINVAL);
}
mp->m_sb.sb_ifree = lcounter;
- return (0);
+ return 0;
case XFS_SBS_FDBLOCKS:
-
- lcounter = (long long)mp->m_sb.sb_fdblocks;
+ lcounter = (long long)
+ mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
res_used = (long long)(mp->m_resblks - mp->m_resblks_avail);
if (delta > 0) { /* Putting blocks back */
if (rsvd) {
lcounter = (long long)mp->m_resblks_avail + delta;
if (lcounter < 0) {
- return (XFS_ERROR(ENOSPC));
+ return XFS_ERROR(ENOSPC);
}
mp->m_resblks_avail = lcounter;
- return (0);
+ return 0;
} else { /* not reserved */
- return (XFS_ERROR(ENOSPC));
+ return XFS_ERROR(ENOSPC);
}
}
}
- mp->m_sb.sb_fdblocks = lcounter;
- return (0);
+ mp->m_sb.sb_fdblocks = lcounter + XFS_ALLOC_SET_ASIDE(mp);
+ return 0;
case XFS_SBS_FREXTENTS:
lcounter = (long long)mp->m_sb.sb_frextents;
lcounter += delta;
if (lcounter < 0) {
- return (XFS_ERROR(ENOSPC));
+ return XFS_ERROR(ENOSPC);
}
mp->m_sb.sb_frextents = lcounter;
- return (0);
+ return 0;
case XFS_SBS_DBLOCKS:
lcounter = (long long)mp->m_sb.sb_dblocks;
lcounter += delta;
if (lcounter < 0) {
ASSERT(0);
- return (XFS_ERROR(EINVAL));
+ return XFS_ERROR(EINVAL);
}
mp->m_sb.sb_dblocks = lcounter;
- return (0);
+ return 0;
case XFS_SBS_AGCOUNT:
scounter = mp->m_sb.sb_agcount;
scounter += delta;
if (scounter < 0) {
ASSERT(0);
- return (XFS_ERROR(EINVAL));
+ return XFS_ERROR(EINVAL);
}
mp->m_sb.sb_agcount = scounter;
- return (0);
+ return 0;
case XFS_SBS_IMAX_PCT:
scounter = mp->m_sb.sb_imax_pct;
scounter += delta;
if (scounter < 0) {
ASSERT(0);
- return (XFS_ERROR(EINVAL));
+ return XFS_ERROR(EINVAL);
}
mp->m_sb.sb_imax_pct = scounter;
- return (0);
+ return 0;
case XFS_SBS_REXTSIZE:
scounter = mp->m_sb.sb_rextsize;
scounter += delta;
if (scounter < 0) {
ASSERT(0);
- return (XFS_ERROR(EINVAL));
+ return XFS_ERROR(EINVAL);
}
mp->m_sb.sb_rextsize = scounter;
- return (0);
+ return 0;
case XFS_SBS_RBMBLOCKS:
scounter = mp->m_sb.sb_rbmblocks;
scounter += delta;
if (scounter < 0) {
ASSERT(0);
- return (XFS_ERROR(EINVAL));
+ return XFS_ERROR(EINVAL);
}
mp->m_sb.sb_rbmblocks = scounter;
- return (0);
+ return 0;
case XFS_SBS_RBLOCKS:
lcounter = (long long)mp->m_sb.sb_rblocks;
lcounter += delta;
if (lcounter < 0) {
ASSERT(0);
- return (XFS_ERROR(EINVAL));
+ return XFS_ERROR(EINVAL);
}
mp->m_sb.sb_rblocks = lcounter;
- return (0);
+ return 0;
case XFS_SBS_REXTENTS:
lcounter = (long long)mp->m_sb.sb_rextents;
lcounter += delta;
if (lcounter < 0) {
ASSERT(0);
- return (XFS_ERROR(EINVAL));
+ return XFS_ERROR(EINVAL);
}
mp->m_sb.sb_rextents = lcounter;
- return (0);
+ return 0;
case XFS_SBS_REXTSLOG:
scounter = mp->m_sb.sb_rextslog;
scounter += delta;
if (scounter < 0) {
ASSERT(0);
- return (XFS_ERROR(EINVAL));
+ return XFS_ERROR(EINVAL);
}
mp->m_sb.sb_rextslog = scounter;
- return (0);
+ return 0;
default:
ASSERT(0);
- return (XFS_ERROR(EINVAL));
+ return XFS_ERROR(EINVAL);
}
}
/*
* xfs_mod_incore_sb() is used to change a field in the in-core
* superblock structure by the specified delta. This modification
- * is protected by the SB_LOCK. Just use the xfs_mod_incore_sb_unlocked()
+ * is protected by the m_sb_lock. Just use the xfs_mod_incore_sb_unlocked()
* routine to do the work.
*/
int
-xfs_mod_incore_sb(xfs_mount_t *mp, xfs_sb_field_t field, int delta, int rsvd)
+xfs_mod_incore_sb(
+ xfs_mount_t *mp,
+ xfs_sb_field_t field,
+ int64_t delta,
+ int rsvd)
{
- unsigned long s;
int status;
- s = XFS_SB_LOCK(mp);
- status = xfs_mod_incore_sb_unlocked(mp, field, delta, rsvd);
- XFS_SB_UNLOCK(mp, s);
- return (status);
+ /* check for per-cpu counters */
+ switch (field) {
+#ifdef HAVE_PERCPU_SB
+ case XFS_SBS_ICOUNT:
+ case XFS_SBS_IFREE:
+ case XFS_SBS_FDBLOCKS:
+ if (!(mp->m_flags & XFS_MOUNT_NO_PERCPU_SB)) {
+ status = xfs_icsb_modify_counters(mp, field,
+ delta, rsvd);
+ break;
+ }
+ /* FALLTHROUGH */
+#endif
+ default:
+ spin_lock(&mp->m_sb_lock);
+ status = xfs_mod_incore_sb_unlocked(mp, field, delta, rsvd);
+ spin_unlock(&mp->m_sb_lock);
+ break;
+ }
+
+ return status;
}
/*
int
xfs_mod_incore_sb_batch(xfs_mount_t *mp, xfs_mod_sb_t *msb, uint nmsb, int rsvd)
{
- unsigned long s;
int status=0;
xfs_mod_sb_t *msbp;
* Loop through the array of mod structures and apply each
* individually. If any fail, then back out all those
* which have already been applied. Do all of this within
- * the scope of the SB_LOCK so that all of the changes will
+ * the scope of the m_sb_lock so that all of the changes will
* be atomic.
*/
- s = XFS_SB_LOCK(mp);
+ spin_lock(&mp->m_sb_lock);
msbp = &msb[0];
for (msbp = &msbp[0]; msbp < (msb + nmsb); msbp++) {
/*
* from the loop so we'll fall into the undo loop
* below.
*/
- status = xfs_mod_incore_sb_unlocked(mp, msbp->msb_field,
- msbp->msb_delta, rsvd);
+ switch (msbp->msb_field) {
+#ifdef HAVE_PERCPU_SB
+ case XFS_SBS_ICOUNT:
+ case XFS_SBS_IFREE:
+ case XFS_SBS_FDBLOCKS:
+ if (!(mp->m_flags & XFS_MOUNT_NO_PERCPU_SB)) {
+ spin_unlock(&mp->m_sb_lock);
+ status = xfs_icsb_modify_counters(mp,
+ msbp->msb_field,
+ msbp->msb_delta, rsvd);
+ spin_lock(&mp->m_sb_lock);
+ break;
+ }
+ /* FALLTHROUGH */
+#endif
+ default:
+ status = xfs_mod_incore_sb_unlocked(mp,
+ msbp->msb_field,
+ msbp->msb_delta, rsvd);
+ break;
+ }
+
if (status != 0) {
break;
}
if (status != 0) {
msbp--;
while (msbp >= msb) {
- status = xfs_mod_incore_sb_unlocked(mp,
- msbp->msb_field, -(msbp->msb_delta), rsvd);
+ switch (msbp->msb_field) {
+#ifdef HAVE_PERCPU_SB
+ case XFS_SBS_ICOUNT:
+ case XFS_SBS_IFREE:
+ case XFS_SBS_FDBLOCKS:
+ if (!(mp->m_flags & XFS_MOUNT_NO_PERCPU_SB)) {
+ spin_unlock(&mp->m_sb_lock);
+ status = xfs_icsb_modify_counters(mp,
+ msbp->msb_field,
+ -(msbp->msb_delta),
+ rsvd);
+ spin_lock(&mp->m_sb_lock);
+ break;
+ }
+ /* FALLTHROUGH */
+#endif
+ default:
+ status = xfs_mod_incore_sb_unlocked(mp,
+ msbp->msb_field,
+ -(msbp->msb_delta),
+ rsvd);
+ break;
+ }
ASSERT(status == 0);
msbp--;
}
}
- XFS_SB_UNLOCK(mp, s);
- return (status);
+ spin_unlock(&mp->m_sb_lock);
+ return status;
}
/*
}
XFS_BUF_HOLD(bp);
ASSERT(XFS_BUF_ISDONE(bp));
- return (bp);
+ return bp;
}
/*
}
/*
- * Remove filesystem from the UUID table.
+ * Used to log changes to the superblock unit and width fields which could
+ * be altered by the mount options, as well as any potential sb_features2
+ * fixup. Only the first superblock is updated.
*/
-STATIC void
-xfs_uuid_unmount(
- xfs_mount_t *mp)
+int
+xfs_mount_log_sb(
+ xfs_mount_t *mp,
+ __int64_t fields)
{
- uuid_table_remove(&mp->m_sb.sb_uuid);
+ xfs_trans_t *tp;
+ int error;
+
+ ASSERT(fields & (XFS_SB_UNIT | XFS_SB_WIDTH | XFS_SB_UUID |
+ XFS_SB_FEATURES2 | XFS_SB_BAD_FEATURES2 |
+ XFS_SB_VERSIONNUM));
+
+ tp = xfs_trans_alloc(mp, XFS_TRANS_SB_UNIT);
+ 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 error;
+ }
+ xfs_mod_sb(tp, fields);
+ error = xfs_trans_commit(tp, 0);
+ return error;
}
+
+#ifdef HAVE_PERCPU_SB
/*
- * 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.
+ * Per-cpu incore superblock counters
+ *
+ * Simple concept, difficult implementation
+ *
+ * Basically, replace the incore superblock counters with a distributed per cpu
+ * counter for contended fields (e.g. free block count).
+ *
+ * Difficulties arise in that the incore sb is used for ENOSPC checking, and
+ * hence needs to be accurately read when we are running low on space. Hence
+ * there is a method to enable and disable the per-cpu counters based on how
+ * much "stuff" is available in them.
+ *
+ * Basically, a counter is enabled if there is enough free resource to justify
+ * running a per-cpu fast-path. If the per-cpu counter runs out (i.e. a local
+ * ENOSPC), then we disable the counters to synchronise all callers and
+ * re-distribute the available resources.
+ *
+ * If, once we redistributed the available resources, we still get a failure,
+ * we disable the per-cpu counter and go through the slow path.
+ *
+ * The slow path is the current xfs_mod_incore_sb() function. This means that
+ * when we disable a per-cpu counter, we need to drain it's resources back to
+ * the global superblock. We do this after disabling the counter to prevent
+ * more threads from queueing up on the counter.
+ *
+ * Essentially, this means that we still need a lock in the fast path to enable
+ * synchronisation between the global counters and the per-cpu counters. This
+ * is not a problem because the lock will be local to a CPU almost all the time
+ * and have little contention except when we get to ENOSPC conditions.
+ *
+ * Basically, this lock becomes a barrier that enables us to lock out the fast
+ * path while we do things like enabling and disabling counters and
+ * synchronising the counters.
+ *
+ * Locking rules:
+ *
+ * 1. m_sb_lock before picking up per-cpu locks
+ * 2. per-cpu locks always picked up via for_each_online_cpu() order
+ * 3. accurate counter sync requires m_sb_lock + per cpu locks
+ * 4. modifying per-cpu counters requires holding per-cpu lock
+ * 5. modifying global counters requires holding m_sb_lock
+ * 6. enabling or disabling a counter requires holding the m_sb_lock
+ * and _none_ of the per-cpu locks.
+ *
+ * Disabled counters are only ever re-enabled by a balance operation
+ * that results in more free resources per CPU than a given threshold.
+ * To ensure counters don't remain disabled, they are rebalanced when
+ * the global resource goes above a higher threshold (i.e. some hysteresis
+ * is present to prevent thrashing).
*/
+
+#ifdef CONFIG_HOTPLUG_CPU
+/*
+ * hot-plug CPU notifier support.
+ *
+ * We need a notifier per filesystem as we need to be able to identify
+ * the filesystem to balance the counters out. This is achieved by
+ * having a notifier block embedded in the xfs_mount_t and doing pointer
+ * magic to get the mount pointer from the notifier block address.
+ */
+STATIC int
+xfs_icsb_cpu_notify(
+ struct notifier_block *nfb,
+ unsigned long action,
+ void *hcpu)
+{
+ xfs_icsb_cnts_t *cntp;
+ xfs_mount_t *mp;
+
+ mp = (xfs_mount_t *)container_of(nfb, xfs_mount_t, m_icsb_notifier);
+ cntp = (xfs_icsb_cnts_t *)
+ per_cpu_ptr(mp->m_sb_cnts, (unsigned long)hcpu);
+ switch (action) {
+ case CPU_UP_PREPARE:
+ case CPU_UP_PREPARE_FROZEN:
+ /* Easy Case - initialize the area and locks, and
+ * then rebalance when online does everything else for us. */
+ memset(cntp, 0, sizeof(xfs_icsb_cnts_t));
+ break;
+ case CPU_ONLINE:
+ case CPU_ONLINE_FROZEN:
+ xfs_icsb_lock(mp);
+ xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0);
+ xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0);
+ xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0);
+ xfs_icsb_unlock(mp);
+ break;
+ case CPU_DEAD:
+ case CPU_DEAD_FROZEN:
+ /* Disable all the counters, then fold the dead cpu's
+ * count into the total on the global superblock and
+ * re-enable the counters. */
+ xfs_icsb_lock(mp);
+ spin_lock(&mp->m_sb_lock);
+ xfs_icsb_disable_counter(mp, XFS_SBS_ICOUNT);
+ xfs_icsb_disable_counter(mp, XFS_SBS_IFREE);
+ xfs_icsb_disable_counter(mp, XFS_SBS_FDBLOCKS);
+
+ mp->m_sb.sb_icount += cntp->icsb_icount;
+ mp->m_sb.sb_ifree += cntp->icsb_ifree;
+ mp->m_sb.sb_fdblocks += cntp->icsb_fdblocks;
+
+ memset(cntp, 0, sizeof(xfs_icsb_cnts_t));
+
+ xfs_icsb_balance_counter_locked(mp, XFS_SBS_ICOUNT, 0);
+ xfs_icsb_balance_counter_locked(mp, XFS_SBS_IFREE, 0);
+ xfs_icsb_balance_counter_locked(mp, XFS_SBS_FDBLOCKS, 0);
+ spin_unlock(&mp->m_sb_lock);
+ xfs_icsb_unlock(mp);
+ break;
+ }
+
+ return NOTIFY_OK;
+}
+#endif /* CONFIG_HOTPLUG_CPU */
+
+int
+xfs_icsb_init_counters(
+ xfs_mount_t *mp)
+{
+ xfs_icsb_cnts_t *cntp;
+ int i;
+
+ mp->m_sb_cnts = alloc_percpu(xfs_icsb_cnts_t);
+ if (mp->m_sb_cnts == NULL)
+ return -ENOMEM;
+
+#ifdef CONFIG_HOTPLUG_CPU
+ mp->m_icsb_notifier.notifier_call = xfs_icsb_cpu_notify;
+ mp->m_icsb_notifier.priority = 0;
+ register_hotcpu_notifier(&mp->m_icsb_notifier);
+#endif /* CONFIG_HOTPLUG_CPU */
+
+ for_each_online_cpu(i) {
+ cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i);
+ memset(cntp, 0, sizeof(xfs_icsb_cnts_t));
+ }
+
+ mutex_init(&mp->m_icsb_mutex);
+
+ /*
+ * start with all counters disabled so that the
+ * initial balance kicks us off correctly
+ */
+ mp->m_icsb_counters = -1;
+ return 0;
+}
+
+void
+xfs_icsb_reinit_counters(
+ xfs_mount_t *mp)
+{
+ xfs_icsb_lock(mp);
+ /*
+ * start with all counters disabled so that the
+ * initial balance kicks us off correctly
+ */
+ mp->m_icsb_counters = -1;
+ xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0);
+ xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0);
+ xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0);
+ xfs_icsb_unlock(mp);
+}
+
+void
+xfs_icsb_destroy_counters(
+ xfs_mount_t *mp)
+{
+ if (mp->m_sb_cnts) {
+ unregister_hotcpu_notifier(&mp->m_icsb_notifier);
+ free_percpu(mp->m_sb_cnts);
+ }
+ mutex_destroy(&mp->m_icsb_mutex);
+}
+
+STATIC_INLINE void
+xfs_icsb_lock_cntr(
+ xfs_icsb_cnts_t *icsbp)
+{
+ while (test_and_set_bit(XFS_ICSB_FLAG_LOCK, &icsbp->icsb_flags)) {
+ ndelay(1000);
+ }
+}
+
+STATIC_INLINE void
+xfs_icsb_unlock_cntr(
+ xfs_icsb_cnts_t *icsbp)
+{
+ clear_bit(XFS_ICSB_FLAG_LOCK, &icsbp->icsb_flags);
+}
+
+
+STATIC_INLINE void
+xfs_icsb_lock_all_counters(
+ xfs_mount_t *mp)
+{
+ xfs_icsb_cnts_t *cntp;
+ int i;
+
+ for_each_online_cpu(i) {
+ cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i);
+ xfs_icsb_lock_cntr(cntp);
+ }
+}
+
+STATIC_INLINE void
+xfs_icsb_unlock_all_counters(
+ xfs_mount_t *mp)
+{
+ xfs_icsb_cnts_t *cntp;
+ int i;
+
+ for_each_online_cpu(i) {
+ cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i);
+ xfs_icsb_unlock_cntr(cntp);
+ }
+}
+
STATIC void
-xfs_mount_log_sbunit(
+xfs_icsb_count(
xfs_mount_t *mp,
- __int64_t fields)
+ xfs_icsb_cnts_t *cnt,
+ int flags)
{
- xfs_trans_t *tp;
+ xfs_icsb_cnts_t *cntp;
+ int i;
- ASSERT(fields & (XFS_SB_UNIT|XFS_SB_WIDTH|XFS_SB_UUID));
+ memset(cnt, 0, sizeof(xfs_icsb_cnts_t));
- 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)) {
- xfs_trans_cancel(tp, 0);
+ if (!(flags & XFS_ICSB_LAZY_COUNT))
+ xfs_icsb_lock_all_counters(mp);
+
+ for_each_online_cpu(i) {
+ cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i);
+ cnt->icsb_icount += cntp->icsb_icount;
+ cnt->icsb_ifree += cntp->icsb_ifree;
+ cnt->icsb_fdblocks += cntp->icsb_fdblocks;
+ }
+
+ if (!(flags & XFS_ICSB_LAZY_COUNT))
+ xfs_icsb_unlock_all_counters(mp);
+}
+
+STATIC int
+xfs_icsb_counter_disabled(
+ xfs_mount_t *mp,
+ xfs_sb_field_t field)
+{
+ ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS));
+ return test_bit(field, &mp->m_icsb_counters);
+}
+
+STATIC void
+xfs_icsb_disable_counter(
+ xfs_mount_t *mp,
+ xfs_sb_field_t field)
+{
+ xfs_icsb_cnts_t cnt;
+
+ ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS));
+
+ /*
+ * If we are already disabled, then there is nothing to do
+ * here. We check before locking all the counters to avoid
+ * the expensive lock operation when being called in the
+ * slow path and the counter is already disabled. This is
+ * safe because the only time we set or clear this state is under
+ * the m_icsb_mutex.
+ */
+ if (xfs_icsb_counter_disabled(mp, field))
return;
+
+ xfs_icsb_lock_all_counters(mp);
+ if (!test_and_set_bit(field, &mp->m_icsb_counters)) {
+ /* drain back to superblock */
+
+ xfs_icsb_count(mp, &cnt, XFS_ICSB_LAZY_COUNT);
+ switch(field) {
+ case XFS_SBS_ICOUNT:
+ mp->m_sb.sb_icount = cnt.icsb_icount;
+ break;
+ case XFS_SBS_IFREE:
+ mp->m_sb.sb_ifree = cnt.icsb_ifree;
+ break;
+ case XFS_SBS_FDBLOCKS:
+ mp->m_sb.sb_fdblocks = cnt.icsb_fdblocks;
+ break;
+ default:
+ BUG();
+ }
}
- xfs_mod_sb(tp, fields);
- xfs_trans_commit(tp, 0, NULL);
+
+ xfs_icsb_unlock_all_counters(mp);
+}
+
+STATIC void
+xfs_icsb_enable_counter(
+ xfs_mount_t *mp,
+ xfs_sb_field_t field,
+ uint64_t count,
+ uint64_t resid)
+{
+ xfs_icsb_cnts_t *cntp;
+ int i;
+
+ ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS));
+
+ xfs_icsb_lock_all_counters(mp);
+ for_each_online_cpu(i) {
+ cntp = per_cpu_ptr(mp->m_sb_cnts, i);
+ switch (field) {
+ case XFS_SBS_ICOUNT:
+ cntp->icsb_icount = count + resid;
+ break;
+ case XFS_SBS_IFREE:
+ cntp->icsb_ifree = count + resid;
+ break;
+ case XFS_SBS_FDBLOCKS:
+ cntp->icsb_fdblocks = count + resid;
+ break;
+ default:
+ BUG();
+ break;
+ }
+ resid = 0;
+ }
+ clear_bit(field, &mp->m_icsb_counters);
+ xfs_icsb_unlock_all_counters(mp);
+}
+
+void
+xfs_icsb_sync_counters_locked(
+ xfs_mount_t *mp,
+ int flags)
+{
+ xfs_icsb_cnts_t cnt;
+
+ xfs_icsb_count(mp, &cnt, flags);
+
+ 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;
+}
+
+/*
+ * Accurate update of per-cpu counters to incore superblock
+ */
+void
+xfs_icsb_sync_counters(
+ xfs_mount_t *mp,
+ int flags)
+{
+ spin_lock(&mp->m_sb_lock);
+ xfs_icsb_sync_counters_locked(mp, flags);
+ spin_unlock(&mp->m_sb_lock);
+}
+
+/*
+ * Balance and enable/disable counters as necessary.
+ *
+ * Thresholds for re-enabling counters are somewhat magic. inode counts are
+ * chosen to be the same number as single on disk allocation chunk per CPU, and
+ * free blocks is something far enough zero that we aren't going thrash when we
+ * get near ENOSPC. We also need to supply a minimum we require per cpu to
+ * prevent looping endlessly when xfs_alloc_space asks for more than will
+ * be distributed to a single CPU but each CPU has enough blocks to be
+ * reenabled.
+ *
+ * Note that we can be called when counters are already disabled.
+ * xfs_icsb_disable_counter() optimises the counter locking in this case to
+ * prevent locking every per-cpu counter needlessly.
+ */
+
+#define XFS_ICSB_INO_CNTR_REENABLE (uint64_t)64
+#define XFS_ICSB_FDBLK_CNTR_REENABLE(mp) \
+ (uint64_t)(512 + XFS_ALLOC_SET_ASIDE(mp))
+STATIC void
+xfs_icsb_balance_counter_locked(
+ xfs_mount_t *mp,
+ xfs_sb_field_t field,
+ int min_per_cpu)
+{
+ uint64_t count, resid;
+ int weight = num_online_cpus();
+ uint64_t min = (uint64_t)min_per_cpu;
+
+ /* disable counter and sync counter */
+ xfs_icsb_disable_counter(mp, field);
+
+ /* update counters - first CPU gets residual*/
+ switch (field) {
+ case XFS_SBS_ICOUNT:
+ count = mp->m_sb.sb_icount;
+ resid = do_div(count, weight);
+ if (count < max(min, XFS_ICSB_INO_CNTR_REENABLE))
+ return;
+ break;
+ case XFS_SBS_IFREE:
+ count = mp->m_sb.sb_ifree;
+ resid = do_div(count, weight);
+ if (count < max(min, XFS_ICSB_INO_CNTR_REENABLE))
+ return;
+ break;
+ case XFS_SBS_FDBLOCKS:
+ count = mp->m_sb.sb_fdblocks;
+ resid = do_div(count, weight);
+ if (count < max(min, XFS_ICSB_FDBLK_CNTR_REENABLE(mp)))
+ return;
+ break;
+ default:
+ BUG();
+ count = resid = 0; /* quiet, gcc */
+ break;
+ }
+
+ xfs_icsb_enable_counter(mp, field, count, resid);
+}
+
+STATIC void
+xfs_icsb_balance_counter(
+ xfs_mount_t *mp,
+ xfs_sb_field_t fields,
+ int min_per_cpu)
+{
+ spin_lock(&mp->m_sb_lock);
+ xfs_icsb_balance_counter_locked(mp, fields, min_per_cpu);
+ spin_unlock(&mp->m_sb_lock);
}
+
+STATIC int
+xfs_icsb_modify_counters(
+ xfs_mount_t *mp,
+ xfs_sb_field_t field,
+ int64_t delta,
+ int rsvd)
+{
+ xfs_icsb_cnts_t *icsbp;
+ long long lcounter; /* long counter for 64 bit fields */
+ int cpu, ret = 0;
+
+ might_sleep();
+again:
+ cpu = get_cpu();
+ icsbp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, cpu);
+
+ /*
+ * if the counter is disabled, go to slow path
+ */
+ if (unlikely(xfs_icsb_counter_disabled(mp, field)))
+ goto slow_path;
+ xfs_icsb_lock_cntr(icsbp);
+ if (unlikely(xfs_icsb_counter_disabled(mp, field))) {
+ xfs_icsb_unlock_cntr(icsbp);
+ goto slow_path;
+ }
+
+ switch (field) {
+ case XFS_SBS_ICOUNT:
+ lcounter = icsbp->icsb_icount;
+ lcounter += delta;
+ if (unlikely(lcounter < 0))
+ goto balance_counter;
+ icsbp->icsb_icount = lcounter;
+ break;
+
+ case XFS_SBS_IFREE:
+ lcounter = icsbp->icsb_ifree;
+ lcounter += delta;
+ if (unlikely(lcounter < 0))
+ goto balance_counter;
+ icsbp->icsb_ifree = lcounter;
+ break;
+
+ case XFS_SBS_FDBLOCKS:
+ BUG_ON((mp->m_resblks - mp->m_resblks_avail) != 0);
+
+ lcounter = icsbp->icsb_fdblocks - XFS_ALLOC_SET_ASIDE(mp);
+ lcounter += delta;
+ if (unlikely(lcounter < 0))
+ goto balance_counter;
+ icsbp->icsb_fdblocks = lcounter + XFS_ALLOC_SET_ASIDE(mp);
+ break;
+ default:
+ BUG();
+ break;
+ }
+ xfs_icsb_unlock_cntr(icsbp);
+ put_cpu();
+ return 0;
+
+slow_path:
+ put_cpu();
+
+ /*
+ * serialise with a mutex so we don't burn lots of cpu on
+ * the superblock lock. We still need to hold the superblock
+ * lock, however, when we modify the global structures.
+ */
+ xfs_icsb_lock(mp);
+
+ /*
+ * Now running atomically.
+ *
+ * If the counter is enabled, someone has beaten us to rebalancing.
+ * Drop the lock and try again in the fast path....
+ */
+ if (!(xfs_icsb_counter_disabled(mp, field))) {
+ xfs_icsb_unlock(mp);
+ goto again;
+ }
+
+ /*
+ * The counter is currently disabled. Because we are
+ * running atomically here, we know a rebalance cannot
+ * be in progress. Hence we can go straight to operating
+ * on the global superblock. We do not call xfs_mod_incore_sb()
+ * here even though we need to get the m_sb_lock. Doing so
+ * will cause us to re-enter this function and deadlock.
+ * Hence we get the m_sb_lock ourselves and then call
+ * xfs_mod_incore_sb_unlocked() as the unlocked path operates
+ * directly on the global counters.
+ */
+ spin_lock(&mp->m_sb_lock);
+ ret = xfs_mod_incore_sb_unlocked(mp, field, delta, rsvd);
+ spin_unlock(&mp->m_sb_lock);
+
+ /*
+ * Now that we've modified the global superblock, we
+ * may be able to re-enable the distributed counters
+ * (e.g. lots of space just got freed). After that
+ * we are done.
+ */
+ if (ret != ENOSPC)
+ xfs_icsb_balance_counter(mp, field, 0);
+ xfs_icsb_unlock(mp);
+ return ret;
+
+balance_counter:
+ xfs_icsb_unlock_cntr(icsbp);
+ put_cpu();
+
+ /*
+ * We may have multiple threads here if multiple per-cpu
+ * counters run dry at the same time. This will mean we can
+ * do more balances than strictly necessary but it is not
+ * the common slowpath case.
+ */
+ xfs_icsb_lock(mp);
+
+ /*
+ * running atomically.
+ *
+ * This will leave the counter in the correct state for future
+ * accesses. After the rebalance, we simply try again and our retry
+ * will either succeed through the fast path or slow path without
+ * another balance operation being required.
+ */
+ xfs_icsb_balance_counter(mp, field, delta);
+ xfs_icsb_unlock(mp);
+ goto again;
+}
+
+#endif
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff