offset = i_size_read(inode);
end_index = offset >> PAGE_CACHE_SHIFT;
last_index = (offset - 1) >> PAGE_CACHE_SHIFT;
- if (page->index >= end_index) {
+
+ /*
+ * The page index is less than the end_index, adjust the end_offset
+ * to the highest offset that this page should represent.
+ * -----------------------------------------------------
+ * | file mapping | <EOF> |
+ * -----------------------------------------------------
+ * | Page ... | Page N-2 | Page N-1 | Page N | |
+ * ^--------------------------------^----------|--------
+ * | desired writeback range | see else |
+ * ---------------------------------^------------------|
+ */
+ if (page->index < end_index)
+ end_offset = (xfs_off_t)(page->index + 1) << PAGE_CACHE_SHIFT;
+ else {
+ /*
+ * Check whether the page to write out is beyond or straddles
+ * i_size or not.
+ * -------------------------------------------------------
+ * | file mapping | <EOF> |
+ * -------------------------------------------------------
+ * | Page ... | Page N-2 | Page N-1 | Page N | Beyond |
+ * ^--------------------------------^-----------|---------
+ * | | Straddles |
+ * ---------------------------------^-----------|--------|
+ */
unsigned offset_into_page = offset & (PAGE_CACHE_SIZE - 1);
/*
* truncate operation that is in progress. We must redirty the
* page so that reclaim stops reclaiming it. Otherwise
* xfs_vm_releasepage() is called on it and gets confused.
+ *
+ * Note that the end_index is unsigned long, it would overflow
+ * if the given offset is greater than 16TB on 32-bit system
+ * and if we do check the page is fully outside i_size or not
+ * via "if (page->index >= end_index + 1)" as "end_index + 1"
+ * will be evaluated to 0. Hence this page will be redirtied
+ * and be written out repeatedly which would result in an
+ * infinite loop, the user program that perform this operation
+ * will hang. Instead, we can verify this situation by checking
+ * if the page to write is totally beyond the i_size or if it's
+ * offset is just equal to the EOF.
*/
- if (page->index >= end_index + 1 || offset_into_page == 0)
+ if (page->index > end_index ||
+ (page->index == end_index && offset_into_page == 0))
goto redirty;
/*
* The page straddles i_size. It must be zeroed out on each
* and every writepage invocation because it may be mmapped.
* "A file is mapped in multiples of the page size. For a file
- * that is not a multiple of the page size, the remaining
+ * that is not a multiple of the page size, the remaining
* memory is zeroed when mapped, and writes to that region are
* not written out to the file."
*/
zero_user_segment(page, offset_into_page, PAGE_CACHE_SIZE);
+
+ /* Adjust the end_offset to the end of file */
+ end_offset = offset;
}
- end_offset = min_t(unsigned long long,
- (xfs_off_t)(page->index + 1) << PAGE_CACHE_SHIFT,
- offset);
len = 1 << inode->i_blkbits;
bh = head = page_buffers(page);
while (!error && !done) {
tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT);
- tp->t_flags |= XFS_TRANS_RESERVE;
/*
* We would need to reserve permanent block for transaction.
* This will come into picture when after shifting extent into
error = xfs_trans_reserve(tp, &M_RES(mp)->tr_write,
XFS_DIOSTRAT_SPACE_RES(mp, 0), 0);
if (error) {
- ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp));
xfs_trans_cancel(tp, 0);
break;
}
xfs_buf_set_ref(bp, XFS_ATTR_BTREE_REF);
else
xfs_buf_set_ref(bp, XFS_DIR_BTREE_REF);
-
- /*
- * This verification code will be moved to a CRC verification callback
- * function so just leave it here unchanged until then.
- */
- {
- xfs_dir2_data_hdr_t *hdr = bp->b_addr;
- xfs_dir2_free_t *free = bp->b_addr;
- xfs_da_blkinfo_t *info = bp->b_addr;
- uint magic, magic1;
- struct xfs_mount *mp = dp->i_mount;
-
- magic = be16_to_cpu(info->magic);
- magic1 = be32_to_cpu(hdr->magic);
- if (unlikely(
- XFS_TEST_ERROR((magic != XFS_DA_NODE_MAGIC) &&
- (magic != XFS_DA3_NODE_MAGIC) &&
- (magic != XFS_ATTR_LEAF_MAGIC) &&
- (magic != XFS_ATTR3_LEAF_MAGIC) &&
- (magic != XFS_DIR2_LEAF1_MAGIC) &&
- (magic != XFS_DIR3_LEAF1_MAGIC) &&
- (magic != XFS_DIR2_LEAFN_MAGIC) &&
- (magic != XFS_DIR3_LEAFN_MAGIC) &&
- (magic1 != XFS_DIR2_BLOCK_MAGIC) &&
- (magic1 != XFS_DIR3_BLOCK_MAGIC) &&
- (magic1 != XFS_DIR2_DATA_MAGIC) &&
- (magic1 != XFS_DIR3_DATA_MAGIC) &&
- (free->hdr.magic !=
- cpu_to_be32(XFS_DIR2_FREE_MAGIC)) &&
- (free->hdr.magic !=
- cpu_to_be32(XFS_DIR3_FREE_MAGIC)),
- mp, XFS_ERRTAG_DA_READ_BUF,
- XFS_RANDOM_DA_READ_BUF))) {
- trace_xfs_da_btree_corrupt(bp, _RET_IP_);
- XFS_CORRUPTION_ERROR("xfs_da_do_buf(2)",
- XFS_ERRLEVEL_LOW, mp, info);
- error = XFS_ERROR(EFSCORRUPTED);
- xfs_trans_brelse(trans, bp);
- goto out_free;
- }
- }
*bpp = bp;
out_free:
if (mapp != &map)
int nodehdr_size;
- ASSERT(xfs_sb_version_hasdirv2(&mp->m_sb));
+ ASSERT(mp->m_sb.sb_versionnum & XFS_SB_VERSION_DIRV2BIT);
ASSERT((1 << (mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog)) <=
XFS_MAX_BLOCKSIZE);
}
if (new_version >= 3) {
geo->version = XFS_FSOP_GEOM_VERSION;
- geo->flags =
+ geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK |
+ XFS_FSOP_GEOM_FLAGS_DIRV2 |
(xfs_sb_version_hasattr(&mp->m_sb) ?
XFS_FSOP_GEOM_FLAGS_ATTR : 0) |
- (xfs_sb_version_hasnlink(&mp->m_sb) ?
- XFS_FSOP_GEOM_FLAGS_NLINK : 0) |
(xfs_sb_version_hasquota(&mp->m_sb) ?
XFS_FSOP_GEOM_FLAGS_QUOTA : 0) |
(xfs_sb_version_hasalign(&mp->m_sb) ?
XFS_FSOP_GEOM_FLAGS_IALIGN : 0) |
(xfs_sb_version_hasdalign(&mp->m_sb) ?
XFS_FSOP_GEOM_FLAGS_DALIGN : 0) |
- (xfs_sb_version_hasshared(&mp->m_sb) ?
- XFS_FSOP_GEOM_FLAGS_SHARED : 0) |
(xfs_sb_version_hasextflgbit(&mp->m_sb) ?
XFS_FSOP_GEOM_FLAGS_EXTFLG : 0) |
- (xfs_sb_version_hasdirv2(&mp->m_sb) ?
- XFS_FSOP_GEOM_FLAGS_DIRV2 : 0) |
(xfs_sb_version_hassector(&mp->m_sb) ?
XFS_FSOP_GEOM_FLAGS_SECTOR : 0) |
(xfs_sb_version_hasasciici(&mp->m_sb) ?
if (tp)
xfs_icreate_log(tp, agno, agbno, mp->m_ialloc_inos,
mp->m_sb.sb_inodesize, length, gen);
- } else if (xfs_sb_version_hasnlink(&mp->m_sb))
+ } else
version = 2;
- else
- version = 1;
for (j = 0; j < nbufs; j++) {
/*
struct xfs_buf *agbp,
xfs_agino_t agino,
struct xfs_bmap_free *flist,
- int *delete,
+ int *deleted,
xfs_ino_t *first_ino,
struct xfs_inobt_rec_incore *orec)
{
if (!(mp->m_flags & XFS_MOUNT_IKEEP) &&
(rec.ir_freecount == mp->m_ialloc_inos)) {
- *delete = 1;
+ *deleted = 1;
*first_ino = XFS_AGINO_TO_INO(mp, agno, rec.ir_startino);
/*
XFS_AGINO_TO_AGBNO(mp, rec.ir_startino)),
mp->m_ialloc_blks, flist, mp);
} else {
- *delete = 0;
+ *deleted = 0;
error = xfs_inobt_update(cur, &rec);
if (error) {
struct xfs_trans *tp, /* transaction pointer */
xfs_ino_t inode, /* inode to be freed */
struct xfs_bmap_free *flist, /* extents to free */
- int *delete,/* set if inode cluster was deleted */
+ int *deleted,/* set if inode cluster was deleted */
xfs_ino_t *first_ino)/* first inode in deleted cluster */
{
/* REFERENCED */
/*
* Fix up the inode allocation btree.
*/
- error = xfs_difree_inobt(mp, tp, agbp, agino, flist, delete, first_ino,
+ error = xfs_difree_inobt(mp, tp, agbp, agino, flist, deleted, first_ino,
&rec);
if (error)
goto error0;
struct xfs_trans *tp, /* transaction pointer */
xfs_ino_t inode, /* inode to be freed */
struct xfs_bmap_free *flist, /* extents to free */
- int *delete, /* set if inode cluster was deleted */
+ int *deleted, /* set if inode cluster was deleted */
xfs_ino_t *first_ino); /* first inode in deleted cluster */
/*
return error;
ASSERT(ip != NULL);
+ /*
+ * We always convert v1 inodes to v2 now - we only support filesystems
+ * with >= v2 inode capability, so there is no reason for ever leaving
+ * an inode in v1 format.
+ */
+ if (ip->i_d.di_version == 1)
+ ip->i_d.di_version = 2;
+
ip->i_d.di_mode = mode;
ip->i_d.di_onlink = 0;
ip->i_d.di_nlink = nlink;
xfs_set_projid(ip, prid);
memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad));
- /*
- * If the superblock version is up to where we support new format
- * inodes and this is currently an old format inode, then change
- * the inode version number now. This way we only do the conversion
- * here rather than here and in the flush/logging code.
- */
- if (xfs_sb_version_hasnlink(&mp->m_sb) &&
- ip->i_d.di_version == 1) {
- ip->i_d.di_version = 2;
- /*
- * We've already zeroed the old link count, the projid field,
- * and the pad field.
- */
- }
-
- /*
- * Project ids won't be stored on disk if we are using a version 1 inode.
- */
- if ((prid != 0) && (ip->i_d.di_version == 1))
- xfs_bump_ino_vers2(tp, ip);
-
if (pip && XFS_INHERIT_GID(pip)) {
ip->i_d.di_gid = pip->i_d.di_gid;
if ((pip->i_d.di_mode & S_ISGID) && S_ISDIR(mode)) {
return error;
}
-/*
- * This gets called when the inode's version needs to be changed from 1 to 2.
- * Currently this happens when the nlink field overflows the old 16-bit value
- * or when chproj is called to change the project for the first time.
- * As a side effect the superblock version will also get rev'd
- * to contain the NLINK bit.
- */
-void
-xfs_bump_ino_vers2(
- xfs_trans_t *tp,
- xfs_inode_t *ip)
-{
- xfs_mount_t *mp;
-
- ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
- ASSERT(ip->i_d.di_version == 1);
-
- ip->i_d.di_version = 2;
- ip->i_d.di_onlink = 0;
- memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad));
- mp = tp->t_mountp;
- if (!xfs_sb_version_hasnlink(&mp->m_sb)) {
- spin_lock(&mp->m_sb_lock);
- if (!xfs_sb_version_hasnlink(&mp->m_sb)) {
- xfs_sb_version_addnlink(&mp->m_sb);
- spin_unlock(&mp->m_sb_lock);
- xfs_mod_sb(tp, XFS_SB_VERSIONNUM);
- } else {
- spin_unlock(&mp->m_sb_lock);
- }
- }
- /* Caller must log the inode */
-}
-
/*
* Increment the link count on an inode & log the change.
*/
{
xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
+ ASSERT(ip->i_d.di_version > 1);
ASSERT(ip->i_d.di_nlink > 0 || (VFS_I(ip)->i_state & I_LINKABLE));
ip->i_d.di_nlink++;
inc_nlink(VFS_I(ip));
- if ((ip->i_d.di_version == 1) &&
- (ip->i_d.di_nlink > XFS_MAXLINK_1)) {
- /*
- * The inode has increased its number of links beyond
- * what can fit in an old format inode. It now needs
- * to be converted to a version 2 inode with a 32 bit
- * link count. If this is the first inode in the file
- * system to do this, then we need to bump the superblock
- * version number as well.
- */
- xfs_bump_ino_vers2(tp, ip);
- }
-
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
return 0;
}
ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE ||
ip->i_d.di_nextents > XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK));
ASSERT(iip != NULL && iip->ili_fields != 0);
+ ASSERT(ip->i_d.di_version > 1);
/* set *dip = inode's place in the buffer */
dip = (xfs_dinode_t *)xfs_buf_offset(bp, ip->i_imap.im_boffset);
}
/*
- * Inode item log recovery for v1/v2 inodes are dependent on the
+ * Inode item log recovery for v2 inodes are dependent on the
* di_flushiter count for correct sequencing. We bump the flush
* iteration count so we can detect flushes which postdate a log record
* during recovery. This is redundant as we now log every change and
if (ip->i_d.di_flushiter == DI_MAX_FLUSH)
ip->i_d.di_flushiter = 0;
- /*
- * If this is really an old format inode and the superblock version
- * has not been updated to support only new format inodes, then
- * convert back to the old inode format. If the superblock version
- * has been updated, then make the conversion permanent.
- */
- ASSERT(ip->i_d.di_version == 1 || xfs_sb_version_hasnlink(&mp->m_sb));
- if (ip->i_d.di_version == 1) {
- if (!xfs_sb_version_hasnlink(&mp->m_sb)) {
- /*
- * Convert it back.
- */
- ASSERT(ip->i_d.di_nlink <= XFS_MAXLINK_1);
- dip->di_onlink = cpu_to_be16(ip->i_d.di_nlink);
- } else {
- /*
- * The superblock version has already been bumped,
- * so just make the conversion to the new inode
- * format permanent.
- */
- ip->i_d.di_version = 2;
- dip->di_version = 2;
- ip->i_d.di_onlink = 0;
- dip->di_onlink = 0;
- memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad));
- memset(&(dip->di_pad[0]), 0,
- sizeof(dip->di_pad));
- ASSERT(xfs_get_projid(ip) == 0);
- }
- }
-
xfs_iflush_fork(ip, dip, iip, XFS_DATA_FORK);
if (XFS_IFORK_Q(ip))
xfs_iflush_fork(ip, dip, iip, XFS_ATTR_FORK);
struct xfs_inode **, int *);
int xfs_droplink(struct xfs_trans *, struct xfs_inode *);
int xfs_bumplink(struct xfs_trans *, struct xfs_inode *);
-void xfs_bump_ino_vers2(struct xfs_trans *, struct xfs_inode *);
/* from xfs_file.c */
int xfs_zero_eof(struct xfs_inode *, xfs_off_t, xfs_fsize_t);
}
/*
- * The inode format changed when we moved the link count and
- * made it 32 bits long. If this is an old format inode,
- * convert it in memory to look like a new one. If it gets
- * flushed to disk we will convert back before flushing or
- * logging it. We zero out the new projid field and the old link
- * count field. We'll handle clearing the pad field (the remains
- * of the old uuid field) when we actually convert the inode to
- * the new format. We don't change the version number so that we
- * can distinguish this from a real new format inode.
+ * Automatically convert version 1 inode formats in memory to version 2
+ * inode format. If the inode is modified, it will get logged and
+ * rewritten as a version 2 inode. We can do this because we set the
+ * superblock feature bit for v2 inodes unconditionally during mount
+ * and it means the reast of the code can assume the inode version is 2
+ * or higher.
*/
if (ip->i_d.di_version == 1) {
+ ip->i_d.di_version = 2;
+ memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad));
ip->i_d.di_nlink = ip->i_d.di_onlink;
ip->i_d.di_onlink = 0;
xfs_set_projid(ip, 0);
xfs_inode_item_attr_fork_size(iip, nvecs, nbytes);
}
-/*
- * If this is a v1 format inode, then we need to log it as such. This means
- * that we have to copy the link count from the new field to the old. We
- * don't have to worry about the new fields, because nothing trusts them as
- * long as the old inode version number is there.
- */
-STATIC void
-xfs_inode_item_format_v1_inode(
- struct xfs_inode *ip)
-{
- if (!xfs_sb_version_hasnlink(&ip->i_mount->m_sb)) {
- /*
- * Convert it back.
- */
- ASSERT(ip->i_d.di_nlink <= XFS_MAXLINK_1);
- ip->i_d.di_onlink = ip->i_d.di_nlink;
- } else {
- /*
- * The superblock version has already been bumped,
- * so just make the conversion to the new inode
- * format permanent.
- */
- ip->i_d.di_version = 2;
- ip->i_d.di_onlink = 0;
- memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad));
- }
-}
-
STATIC void
xfs_inode_item_format_data_fork(
struct xfs_inode_log_item *iip,
struct xfs_inode_log_format *ilf;
struct xfs_log_iovec *vecp = NULL;
+ ASSERT(ip->i_d.di_version > 1);
+
ilf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_IFORMAT);
ilf->ilf_type = XFS_LI_INODE;
ilf->ilf_ino = ip->i_ino;
ilf->ilf_size = 2; /* format + core */
xlog_finish_iovec(lv, vecp, sizeof(struct xfs_inode_log_format));
- if (ip->i_d.di_version == 1)
- xfs_inode_item_format_v1_inode(ip);
xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ICORE,
&ip->i_d,
xfs_icdinode_size(ip->i_d.di_version));
olddquot = xfs_qm_vop_chown(tp, ip,
&ip->i_pdquot, pdqp);
}
+ ASSERT(ip->i_d.di_version > 1);
xfs_set_projid(ip, fa->fsx_projid);
-
- /*
- * We may have to rev the inode as well as
- * the superblock version number since projids didn't
- * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
- */
- if (ip->i_d.di_version == 1)
- xfs_bump_ino_vers2(tp, ip);
}
}
struct xfs_log_iovec *lv_iovecp; /* iovec array */
struct xfs_log_item *lv_item; /* owner */
char *lv_buf; /* formatted buffer */
- int lv_buf_len; /* size of formatted buffer */
+ int lv_bytes; /* accounted space in buffer */
+ int lv_buf_len; /* aligned size of buffer */
int lv_size; /* size of allocated lv */
};
return vec->i_addr;
}
+/*
+ * We need to make sure the next buffer is naturally aligned for the biggest
+ * basic data type we put into it. We already accounted for this padding when
+ * sizing the buffer.
+ *
+ * However, this padding does not get written into the log, and hence we have to
+ * track the space used by the log vectors separately to prevent log space hangs
+ * due to inaccurate accounting (i.e. a leak) of the used log space through the
+ * CIL context ticket.
+ */
static inline void
xlog_finish_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec *vec, int len)
{
- /*
- * We need to make sure the next buffer is naturally aligned for the
- * biggest basic data type we put into it. We already accounted for
- * this when sizing the buffer.
- */
lv->lv_buf_len += round_up(len, sizeof(uint64_t));
+ lv->lv_bytes += len;
vec->i_len = len;
}
{
/* Account for the new LV being passed in */
if (lv->lv_buf_len != XFS_LOG_VEC_ORDERED) {
- *diff_len += lv->lv_buf_len;
+ *diff_len += lv->lv_bytes;
*diff_iovecs += lv->lv_niovecs;
}
else if (old_lv != lv) {
ASSERT(lv->lv_buf_len != XFS_LOG_VEC_ORDERED);
- *diff_len -= old_lv->lv_buf_len;
+ *diff_len -= old_lv->lv_bytes;
*diff_iovecs -= old_lv->lv_niovecs;
kmem_free(old_lv);
}
* that the space reservation accounting is correct.
*/
*diff_iovecs -= lv->lv_niovecs;
- *diff_len -= lv->lv_buf_len;
+ *diff_len -= lv->lv_bytes;
} else {
/* allocate new data chunk */
lv = kmem_zalloc(buf_size, KM_SLEEP|KM_NOFS);
/* The allocated data region lies beyond the iovec region */
lv->lv_buf_len = 0;
+ lv->lv_bytes = 0;
lv->lv_buf = (char *)lv + buf_size - nbytes;
ASSERT(IS_ALIGNED((unsigned long)lv->lv_buf, sizeof(uint64_t)));
mp->m_update_flags |= XFS_SB_VERSIONNUM;
}
+ /* always use v2 inodes by default now */
+ if (!(mp->m_sb.sb_versionnum & XFS_SB_VERSION_NLINKBIT)) {
+ mp->m_sb.sb_versionnum |= XFS_SB_VERSION_NLINKBIT;
+ mp->m_update_flags |= XFS_SB_VERSIONNUM;
+ }
+
/*
* Check if sb_agblocks is aligned at stripe boundary
* If sb_agblocks is NOT aligned turn off m_dalign since
(sbp->sb_imax_pct > 100 /* zero sb_imax_pct is valid */) ||
sbp->sb_dblocks == 0 ||
sbp->sb_dblocks > XFS_MAX_DBLOCKS(sbp) ||
- sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp))) {
+ sbp->sb_dblocks < XFS_MIN_DBLOCKS(sbp) ||
+ sbp->sb_shared_vn != 0)) {
xfs_notice(mp, "SB sanity check failed");
return XFS_ERROR(EFSCORRUPTED);
}
xfs_warn(mp, "Offline file system operation in progress!");
return XFS_ERROR(EFSCORRUPTED);
}
-
- /*
- * Version 1 directory format has never worked on Linux.
- */
- if (unlikely(!xfs_sb_version_hasdirv2(sbp))) {
- xfs_warn(mp, "file system using version 1 directory format");
- return XFS_ERROR(ENOSYS);
- }
-
return 0;
}
#define XFS_SB_VERSION_5 5 /* CRC enabled filesystem */
#define XFS_SB_VERSION_NUMBITS 0x000f
#define XFS_SB_VERSION_ALLFBITS 0xfff0
-#define XFS_SB_VERSION_SASHFBITS 0xf000
-#define XFS_SB_VERSION_REALFBITS 0x0ff0
#define XFS_SB_VERSION_ATTRBIT 0x0010
#define XFS_SB_VERSION_NLINKBIT 0x0020
#define XFS_SB_VERSION_QUOTABIT 0x0040
#define XFS_SB_VERSION_DIRV2BIT 0x2000
#define XFS_SB_VERSION_BORGBIT 0x4000 /* ASCII only case-insens. */
#define XFS_SB_VERSION_MOREBITSBIT 0x8000
-#define XFS_SB_VERSION_OKSASHFBITS \
- (XFS_SB_VERSION_EXTFLGBIT | \
- XFS_SB_VERSION_DIRV2BIT | \
- XFS_SB_VERSION_BORGBIT)
-#define XFS_SB_VERSION_OKREALFBITS \
- (XFS_SB_VERSION_ATTRBIT | \
- XFS_SB_VERSION_NLINKBIT | \
- XFS_SB_VERSION_QUOTABIT | \
- XFS_SB_VERSION_ALIGNBIT | \
- XFS_SB_VERSION_DALIGNBIT | \
- XFS_SB_VERSION_SHAREDBIT | \
- XFS_SB_VERSION_LOGV2BIT | \
- XFS_SB_VERSION_SECTORBIT | \
- XFS_SB_VERSION_MOREBITSBIT)
-#define XFS_SB_VERSION_OKREALBITS \
- (XFS_SB_VERSION_NUMBITS | \
- XFS_SB_VERSION_OKREALFBITS | \
- XFS_SB_VERSION_OKSASHFBITS)
+
+/*
+ * Supported feature bit list is just all bits in the versionnum field because
+ * we've used them all up and understand them all. Except, of course, for the
+ * shared superblock bit, which nobody knows what it does and so is unsupported.
+ */
+#define XFS_SB_VERSION_OKBITS \
+ ((XFS_SB_VERSION_NUMBITS | XFS_SB_VERSION_ALLFBITS) & \
+ ~XFS_SB_VERSION_SHAREDBIT)
/*
* There are two words to hold XFS "feature" bits: the original
*
* These defines represent bits in sb_features2.
*/
-#define XFS_SB_VERSION2_REALFBITS 0x00ffffff /* Mask: features */
#define XFS_SB_VERSION2_RESERVED1BIT 0x00000001
#define XFS_SB_VERSION2_LAZYSBCOUNTBIT 0x00000002 /* Superblk counters */
#define XFS_SB_VERSION2_RESERVED4BIT 0x00000004
#define XFS_SB_VERSION2_CRCBIT 0x00000100 /* metadata CRCs */
#define XFS_SB_VERSION2_FTYPE 0x00000200 /* inode type in dir */
-#define XFS_SB_VERSION2_OKREALFBITS \
+#define XFS_SB_VERSION2_OKBITS \
(XFS_SB_VERSION2_LAZYSBCOUNTBIT | \
XFS_SB_VERSION2_ATTR2BIT | \
XFS_SB_VERSION2_PROJID32BIT | \
XFS_SB_VERSION2_FTYPE)
-#define XFS_SB_VERSION2_OKSASHFBITS \
- (0)
-#define XFS_SB_VERSION2_OKREALBITS \
- (XFS_SB_VERSION2_OKREALFBITS | \
- XFS_SB_VERSION2_OKSASHFBITS )
/*
* Superblock - in core version. Must match the ondisk version below.
#define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
-static inline int xfs_sb_good_version(xfs_sb_t *sbp)
-{
- /* We always support version 1-3 */
- if (sbp->sb_versionnum >= XFS_SB_VERSION_1 &&
- sbp->sb_versionnum <= XFS_SB_VERSION_3)
- return 1;
-
- /* We support version 4 if all feature bits are supported */
- if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4) {
- if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKREALBITS) ||
- ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) &&
- (sbp->sb_features2 & ~XFS_SB_VERSION2_OKREALBITS)))
- return 0;
-
- if (sbp->sb_shared_vn > XFS_SB_MAX_SHARED_VN)
- return 0;
- return 1;
- }
- if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5)
- return 1;
-
- return 0;
-}
-
/*
- * Detect a mismatched features2 field. Older kernels read/wrote
- * this into the wrong slot, so to be safe we keep them in sync.
+ * The first XFS version we support is a v4 superblock with V2 directories.
*/
-static inline int xfs_sb_has_mismatched_features2(xfs_sb_t *sbp)
+static inline bool xfs_sb_good_v4_features(struct xfs_sb *sbp)
{
- return (sbp->sb_bad_features2 != sbp->sb_features2);
-}
+ if (!(sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT))
+ return false;
-static inline unsigned xfs_sb_version_tonew(unsigned v)
-{
- if (v == XFS_SB_VERSION_1)
- return XFS_SB_VERSION_4;
+ /* check for unknown features in the fs */
+ if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKBITS) ||
+ ((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) &&
+ (sbp->sb_features2 & ~XFS_SB_VERSION2_OKBITS)))
+ return false;
- if (v == XFS_SB_VERSION_2)
- return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
-
- return XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT |
- XFS_SB_VERSION_NLINKBIT;
+ return true;
}
-static inline unsigned xfs_sb_version_toold(unsigned v)
+static inline bool xfs_sb_good_version(struct xfs_sb *sbp)
{
- if (v & (XFS_SB_VERSION_QUOTABIT | XFS_SB_VERSION_ALIGNBIT))
- return 0;
- if (v & XFS_SB_VERSION_NLINKBIT)
- return XFS_SB_VERSION_3;
- if (v & XFS_SB_VERSION_ATTRBIT)
- return XFS_SB_VERSION_2;
- return XFS_SB_VERSION_1;
-}
-
-static inline int xfs_sb_version_hasattr(xfs_sb_t *sbp)
-{
- return sbp->sb_versionnum == XFS_SB_VERSION_2 ||
- sbp->sb_versionnum == XFS_SB_VERSION_3 ||
- (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
- (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT));
+ if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5)
+ return true;
+ if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4)
+ return xfs_sb_good_v4_features(sbp);
+ return false;
}
-static inline void xfs_sb_version_addattr(xfs_sb_t *sbp)
+/*
+ * Detect a mismatched features2 field. Older kernels read/wrote
+ * this into the wrong slot, so to be safe we keep them in sync.
+ */
+static inline bool xfs_sb_has_mismatched_features2(struct xfs_sb *sbp)
{
- if (sbp->sb_versionnum == XFS_SB_VERSION_1)
- sbp->sb_versionnum = XFS_SB_VERSION_2;
- else if (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4)
- sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT;
- else
- sbp->sb_versionnum = XFS_SB_VERSION_4 | XFS_SB_VERSION_ATTRBIT;
+ return sbp->sb_bad_features2 != sbp->sb_features2;
}
-static inline int xfs_sb_version_hasnlink(xfs_sb_t *sbp)
+static inline bool xfs_sb_version_hasattr(struct xfs_sb *sbp)
{
- return sbp->sb_versionnum == XFS_SB_VERSION_3 ||
- (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
- (sbp->sb_versionnum & XFS_SB_VERSION_NLINKBIT));
+ return (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT);
}
-static inline void xfs_sb_version_addnlink(xfs_sb_t *sbp)
+static inline void xfs_sb_version_addattr(struct xfs_sb *sbp)
{
- if (sbp->sb_versionnum <= XFS_SB_VERSION_2)
- sbp->sb_versionnum = XFS_SB_VERSION_3;
- else
- sbp->sb_versionnum |= XFS_SB_VERSION_NLINKBIT;
+ sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT;
}
-static inline int xfs_sb_version_hasquota(xfs_sb_t *sbp)
+static inline bool xfs_sb_version_hasquota(struct xfs_sb *sbp)
{
- return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
- (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
+ return (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
}
-static inline void xfs_sb_version_addquota(xfs_sb_t *sbp)
+static inline void xfs_sb_version_addquota(struct xfs_sb *sbp)
{
- if (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4)
- sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT;
- else
- sbp->sb_versionnum = xfs_sb_version_tonew(sbp->sb_versionnum) |
- XFS_SB_VERSION_QUOTABIT;
+ sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT;
}
-static inline int xfs_sb_version_hasalign(xfs_sb_t *sbp)
+static inline bool xfs_sb_version_hasalign(struct xfs_sb *sbp)
{
- return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
- (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
+ return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 ||
(sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT));
}
-static inline int xfs_sb_version_hasdalign(xfs_sb_t *sbp)
+static inline bool xfs_sb_version_hasdalign(struct xfs_sb *sbp)
{
- return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
- (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
+ return (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
}
-static inline int xfs_sb_version_hasshared(xfs_sb_t *sbp)
+static inline bool xfs_sb_version_haslogv2(struct xfs_sb *sbp)
{
- return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
- (sbp->sb_versionnum & XFS_SB_VERSION_SHAREDBIT);
+ return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 ||
+ (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
}
-static inline int xfs_sb_version_hasdirv2(xfs_sb_t *sbp)
+static inline bool xfs_sb_version_hasextflgbit(struct xfs_sb *sbp)
{
- return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
- (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
- (sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT));
+ return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 ||
+ (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
}
-static inline int xfs_sb_version_haslogv2(xfs_sb_t *sbp)
+static inline bool xfs_sb_version_hassector(struct xfs_sb *sbp)
{
- return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
- (XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
- (sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT));
+ return (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
}
-static inline int xfs_sb_version_hasextflgbit(xfs_sb_t *sbp)
+static inline bool xfs_sb_version_hasasciici(struct xfs_sb *sbp)
{
- return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
- (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
- (sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT));
+ return (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT);
}
-static inline int xfs_sb_version_hassector(xfs_sb_t *sbp)
+static inline bool xfs_sb_version_hasmorebits(struct xfs_sb *sbp)
{
- return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
- (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
-}
-
-static inline int xfs_sb_version_hasasciici(xfs_sb_t *sbp)
-{
- return XFS_SB_VERSION_NUM(sbp) >= XFS_SB_VERSION_4 &&
- (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT);
-}
-
-static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
-{
- return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
- (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4 &&
- (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT));
+ return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 ||
+ (sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
}
/*
* sb_features2 bit version macros.
- *
- * For example, for a bit defined as XFS_SB_VERSION2_FUNBIT, has a macro:
- *
- * SB_VERSION_HASFUNBIT(xfs_sb_t *sbp)
- * ((xfs_sb_version_hasmorebits(sbp) &&
- * ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
*/
-
-static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
+static inline bool xfs_sb_version_haslazysbcount(struct xfs_sb *sbp)
{
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
(xfs_sb_version_hasmorebits(sbp) &&
(sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT));
}
-static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
+static inline bool xfs_sb_version_hasattr2(struct xfs_sb *sbp)
{
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
(xfs_sb_version_hasmorebits(sbp) &&
(sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT));
}
-static inline void xfs_sb_version_addattr2(xfs_sb_t *sbp)
+static inline void xfs_sb_version_addattr2(struct xfs_sb *sbp)
{
sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT;
+ sbp->sb_bad_features2 |= XFS_SB_VERSION2_ATTR2BIT;
}
-static inline void xfs_sb_version_removeattr2(xfs_sb_t *sbp)
+static inline void xfs_sb_version_removeattr2(struct xfs_sb *sbp)
{
sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT;
+ sbp->sb_bad_features2 &= ~XFS_SB_VERSION2_ATTR2BIT;
if (!sbp->sb_features2)
sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT;
}
-static inline int xfs_sb_version_hasprojid32bit(xfs_sb_t *sbp)
+static inline bool xfs_sb_version_hasprojid32bit(struct xfs_sb *sbp)
{
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
(xfs_sb_version_hasmorebits(sbp) &&
(sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT));
}
-static inline void xfs_sb_version_addprojid32bit(xfs_sb_t *sbp)
+static inline void xfs_sb_version_addprojid32bit(struct xfs_sb *sbp)
{
sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
sbp->sb_features2 |= XFS_SB_VERSION2_PROJID32BIT;
/*
* V5 superblock specific feature checks
*/
-static inline int xfs_sb_version_hascrc(xfs_sb_t *sbp)
+static inline int xfs_sb_version_hascrc(struct xfs_sb *sbp)
{
return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
}
-static inline int xfs_sb_version_has_pquotino(xfs_sb_t *sbp)
+static inline int xfs_sb_version_has_pquotino(struct xfs_sb *sbp)
{
return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
}
projects / linux-2.6-block.git / commitdiff