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xfs: make xfs_bmbt_to_iomap more useful 

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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: