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xfs: make xfs_bmbt_to_iomap more useful

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Move checking for invalid zero blocks and setting of various iomap flags
into this helper.  Also make it deal with "raw" delalloc extents to
avoid clutter in the callers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig 2019-02-18 09:38:46 -08:00 committed by Darrick J. Wong
parent 15baadf72c
commit 16be143373
3 changed files with 41 additions and 49 deletions
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84
fs/xfs/xfs_iomap.c
View File

@ -35,18 +35,40 @@
#define XFS_WRITEIO_ALIGN(mp,off) (((off) >> mp->m_writeio_log) \
<< mp->m_writeio_log)
void
static int
xfs_alert_fsblock_zero(
xfs_inode_t *ip,
xfs_bmbt_irec_t *imap)
{
xfs_alert_tag(ip->i_mount, XFS_PTAG_FSBLOCK_ZERO,
"Access to block zero in inode %llu "
"start_block: %llx start_off: %llx "
"blkcnt: %llx extent-state: %x",
(unsigned long long)ip->i_ino,
(unsigned long long)imap->br_startblock,
(unsigned long long)imap->br_startoff,
(unsigned long long)imap->br_blockcount,
imap->br_state);
return -EFSCORRUPTED;
}
int
xfs_bmbt_to_iomap(
struct xfs_inode *ip,
struct iomap *iomap,
struct xfs_bmbt_irec *imap)
struct xfs_bmbt_irec *imap,
bool shared)
{
struct xfs_mount *mp = ip->i_mount;
if (unlikely(!imap->br_startblock && !XFS_IS_REALTIME_INODE(ip)))
return xfs_alert_fsblock_zero(ip, imap);
if (imap->br_startblock == HOLESTARTBLOCK) {
iomap->addr = IOMAP_NULL_ADDR;
iomap->type = IOMAP_HOLE;
} else if (imap->br_startblock == DELAYSTARTBLOCK) {
} else if (imap->br_startblock == DELAYSTARTBLOCK ||
isnullstartblock(imap->br_startblock)) {
iomap->addr = IOMAP_NULL_ADDR;
iomap->type = IOMAP_DELALLOC;
} else {
@ -60,6 +82,13 @@ xfs_bmbt_to_iomap(
iomap->length = XFS_FSB_TO_B(mp, imap->br_blockcount);
iomap->bdev = xfs_find_bdev_for_inode(VFS_I(ip));
iomap->dax_dev = xfs_find_daxdev_for_inode(VFS_I(ip));
if (xfs_ipincount(ip) &&
(ip->i_itemp->ili_fsync_fields & ~XFS_ILOG_TIMESTAMP))
iomap->flags |= IOMAP_F_DIRTY;
if (shared)
iomap->flags |= IOMAP_F_SHARED;
return 0;
}
static void
@ -138,23 +167,6 @@ xfs_iomap_eof_align_last_fsb(
return 0;
}
STATIC int
xfs_alert_fsblock_zero(
xfs_inode_t *ip,
xfs_bmbt_irec_t *imap)
{
xfs_alert_tag(ip->i_mount, XFS_PTAG_FSBLOCK_ZERO,
"Access to block zero in inode %llu "
"start_block: %llx start_off: %llx "
"blkcnt: %llx extent-state: %x",
(unsigned long long)ip->i_ino,
(unsigned long long)imap->br_startblock,
(unsigned long long)imap->br_startoff,
(unsigned long long)imap->br_blockcount,
imap->br_state);
return -EFSCORRUPTED;
}
int
xfs_iomap_write_direct(
xfs_inode_t *ip,
@ -649,17 +661,7 @@ retry:
iomap->flags |= IOMAP_F_NEW;
trace_xfs_iomap_alloc(ip, offset, count, XFS_DATA_FORK, &got);
done:
if (isnullstartblock(got.br_startblock))
got.br_startblock = DELAYSTARTBLOCK;
if (!got.br_startblock) {
error = xfs_alert_fsblock_zero(ip, &got);
if (error)
goto out_unlock;
}
xfs_bmbt_to_iomap(ip, iomap, &got);
error = xfs_bmbt_to_iomap(ip, iomap, &got, false);
out_unlock:
xfs_iunlock(ip, XFS_ILOCK_EXCL);
return error;
@ -976,15 +978,7 @@ xfs_file_iomap_begin(
trace_xfs_iomap_alloc(ip, offset, length, XFS_DATA_FORK, &imap);
out_finish:
if (xfs_ipincount(ip) && (ip->i_itemp->ili_fsync_fields
& ~XFS_ILOG_TIMESTAMP))
iomap->flags |= IOMAP_F_DIRTY;
xfs_bmbt_to_iomap(ip, iomap, &imap);
if (shared)
iomap->flags |= IOMAP_F_SHARED;
return 0;
return xfs_bmbt_to_iomap(ip, iomap, &imap, shared);
out_found:
ASSERT(nimaps);
@ -1107,12 +1101,10 @@ xfs_xattr_iomap_begin(
out_unlock:
xfs_iunlock(ip, lockmode);
if (!error) {
ASSERT(nimaps);
xfs_bmbt_to_iomap(ip, iomap, &imap);
}
return error;
if (error)
return error;
ASSERT(nimaps);
return xfs_bmbt_to_iomap(ip, iomap, &imap, false);
}
const struct iomap_ops xfs_xattr_iomap_ops = {

4
fs/xfs/xfs_iomap.h
View File

@ -15,8 +15,8 @@ int xfs_iomap_write_direct(struct xfs_inode *, xfs_off_t, size_t,
struct xfs_bmbt_irec *, int);
int xfs_iomap_write_unwritten(struct xfs_inode *, xfs_off_t, xfs_off_t, bool);
void xfs_bmbt_to_iomap(struct xfs_inode *, struct iomap *,
struct xfs_bmbt_irec *);
int xfs_bmbt_to_iomap(struct xfs_inode *, struct iomap *,
struct xfs_bmbt_irec *, bool shared);
xfs_extlen_t xfs_eof_alignment(struct xfs_inode *ip, xfs_extlen_t extsize);
static inline xfs_filblks_t

2
fs/xfs/xfs_pnfs.c
View File

@ -185,7 +185,7 @@ xfs_fs_map_blocks(
}
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
xfs_bmbt_to_iomap(ip, iomap, &imap);
error = xfs_bmbt_to_iomap(ip, iomap, &imap, false);
*device_generation = mp->m_generation;
return error;
out_unlock: