struct inode *inode,
loff_t offset,
ssize_t count,
- xfs_iomap_t *mapp,
+ struct xfs_bmbt_irec *imap,
int flags)
{
int nmaps = 1;
+ int new = 0;
- return -xfs_iomap(XFS_I(inode), offset, count, flags, mapp, &nmaps);
+ return -xfs_iomap(XFS_I(inode), offset, count, flags, imap, &nmaps, &new);
}
STATIC int
xfs_iomap_valid(
struct inode *inode,
- xfs_iomap_t *iomapp,
+ struct xfs_bmbt_irec *imap,
loff_t offset)
{
struct xfs_mount *mp = XFS_I(inode)->i_mount;
- xfs_off_t iomap_offset = XFS_FSB_TO_B(mp, iomapp->iomap_offset);
- xfs_off_t iomap_bsize = XFS_FSB_TO_B(mp, iomapp->iomap_bsize);
+ xfs_off_t iomap_offset = XFS_FSB_TO_B(mp, imap->br_startoff);
+ xfs_off_t iomap_bsize = XFS_FSB_TO_B(mp, imap->br_blockcount);
return offset >= iomap_offset &&
offset < iomap_offset + iomap_bsize;
xfs_map_buffer(
struct inode *inode,
struct buffer_head *bh,
- xfs_iomap_t *mp,
+ struct xfs_bmbt_irec *imap,
xfs_off_t offset)
{
sector_t bn;
struct xfs_mount *m = XFS_I(inode)->i_mount;
- xfs_off_t iomap_offset = XFS_FSB_TO_B(m, mp->iomap_offset);
- xfs_daddr_t iomap_bn = xfs_fsb_to_db(XFS_I(inode), mp->iomap_bn);
+ xfs_off_t iomap_offset = XFS_FSB_TO_B(m, imap->br_startoff);
+ xfs_daddr_t iomap_bn = xfs_fsb_to_db(XFS_I(inode), imap->br_startblock);
- ASSERT(mp->iomap_bn != HOLESTARTBLOCK);
- ASSERT(mp->iomap_bn != DELAYSTARTBLOCK);
+ ASSERT(imap->br_startblock != HOLESTARTBLOCK);
+ ASSERT(imap->br_startblock != DELAYSTARTBLOCK);
bn = (iomap_bn >> (inode->i_blkbits - BBSHIFT)) +
((offset - iomap_offset) >> inode->i_blkbits);
xfs_map_at_offset(
struct inode *inode,
struct buffer_head *bh,
- xfs_iomap_t *iomapp,
+ struct xfs_bmbt_irec *imap,
xfs_off_t offset)
{
- ASSERT(iomapp->iomap_bn != HOLESTARTBLOCK);
- ASSERT(iomapp->iomap_bn != DELAYSTARTBLOCK);
+ ASSERT(imap->br_startblock != HOLESTARTBLOCK);
+ ASSERT(imap->br_startblock != DELAYSTARTBLOCK);
lock_buffer(bh);
- xfs_map_buffer(inode, bh, iomapp, offset);
+ xfs_map_buffer(inode, bh, imap, offset);
bh->b_bdev = xfs_find_bdev_for_inode(inode);
set_buffer_mapped(bh);
clear_buffer_delay(bh);
struct inode *inode,
struct page *page,
loff_t tindex,
- xfs_iomap_t *mp,
+ struct xfs_bmbt_irec *imap,
xfs_ioend_t **ioendp,
struct writeback_control *wbc,
int startio,
else
type = IOMAP_DELAY;
- if (!xfs_iomap_valid(inode, mp, offset)) {
+ if (!xfs_iomap_valid(inode, imap, offset)) {
done = 1;
continue;
}
- ASSERT(mp->iomap_bn != HOLESTARTBLOCK);
- ASSERT(mp->iomap_bn != DELAYSTARTBLOCK);
+ ASSERT(imap->br_startblock != HOLESTARTBLOCK);
+ ASSERT(imap->br_startblock != DELAYSTARTBLOCK);
- xfs_map_at_offset(inode, bh, mp, offset);
+ xfs_map_at_offset(inode, bh, imap, offset);
if (startio) {
xfs_add_to_ioend(inode, bh, offset,
type, ioendp, done);
xfs_cluster_write(
struct inode *inode,
pgoff_t tindex,
- xfs_iomap_t *iomapp,
+ struct xfs_bmbt_irec *imap,
xfs_ioend_t **ioendp,
struct writeback_control *wbc,
int startio,
for (i = 0; i < pagevec_count(&pvec); i++) {
done = xfs_convert_page(inode, pvec.pages[i], tindex++,
- iomapp, ioendp, wbc, startio, all_bh);
+ imap, ioendp, wbc, startio, all_bh);
if (done)
break;
}
int unmapped) /* also implies page uptodate */
{
struct buffer_head *bh, *head;
- xfs_iomap_t iomap;
+ struct xfs_bmbt_irec imap;
xfs_ioend_t *ioend = NULL, *iohead = NULL;
loff_t offset;
unsigned long p_offset = 0;
}
if (iomap_valid)
- iomap_valid = xfs_iomap_valid(inode, &iomap, offset);
+ iomap_valid = xfs_iomap_valid(inode, &imap, offset);
/*
* First case, map an unwritten extent and prepare for
}
err = xfs_map_blocks(inode, offset, size,
- &iomap, flags);
+ &imap, flags);
if (err)
goto error;
- iomap_valid = xfs_iomap_valid(inode, &iomap, offset);
+ iomap_valid = xfs_iomap_valid(inode, &imap, offset);
}
if (iomap_valid) {
- xfs_map_at_offset(inode, bh, &iomap, offset);
+ xfs_map_at_offset(inode, bh, &imap, offset);
if (startio) {
xfs_add_to_ioend(inode, bh, offset,
type, &ioend,
size = xfs_probe_cluster(inode, page, bh,
head, 1);
err = xfs_map_blocks(inode, offset, size,
- &iomap, flags);
+ &imap, flags);
if (err)
goto error;
- iomap_valid = xfs_iomap_valid(inode, &iomap, offset);
+ iomap_valid = xfs_iomap_valid(inode, &imap, offset);
}
/*
if (ioend && iomap_valid) {
struct xfs_mount *m = XFS_I(inode)->i_mount;
- xfs_off_t iomap_offset = XFS_FSB_TO_B(m, iomap.iomap_offset);
- xfs_off_t iomap_bsize = XFS_FSB_TO_B(m, iomap.iomap_bsize);
+ xfs_off_t iomap_offset = XFS_FSB_TO_B(m, imap.br_startoff);
+ xfs_off_t iomap_bsize = XFS_FSB_TO_B(m, imap.br_blockcount);
offset = (iomap_offset + iomap_bsize - 1) >>
PAGE_CACHE_SHIFT;
tlast = min_t(pgoff_t, offset, last_index);
- xfs_cluster_write(inode, page->index + 1, &iomap, &ioend,
+ xfs_cluster_write(inode, page->index + 1, &imap, &ioend,
wbc, startio, all_bh, tlast);
}
int direct,
bmapi_flags_t flags)
{
- xfs_iomap_t iomap;
+ struct xfs_bmbt_irec imap;
xfs_off_t offset;
ssize_t size;
- int niomap = 1;
+ int nimap = 1;
+ int new = 0;
int error;
offset = (xfs_off_t)iblock << inode->i_blkbits;
return 0;
error = xfs_iomap(XFS_I(inode), offset, size,
- create ? flags : BMAPI_READ, &iomap, &niomap);
+ create ? flags : BMAPI_READ, &imap, &nimap, &new);
if (error)
return -error;
- if (niomap == 0)
+ if (nimap == 0)
return 0;
- if (iomap.iomap_bn != HOLESTARTBLOCK &&
- iomap.iomap_bn != DELAYSTARTBLOCK) {
+ if (imap.br_startblock != HOLESTARTBLOCK &&
+ imap.br_startblock != DELAYSTARTBLOCK) {
/*
* For unwritten extents do not report a disk address on
* the read case (treat as if we're reading into a hole).
*/
- if (create || !(iomap.iomap_flags & IOMAP_UNWRITTEN))
- xfs_map_buffer(inode, bh_result, &iomap, offset);
- if (create && (iomap.iomap_flags & IOMAP_UNWRITTEN)) {
+ if (create || !ISUNWRITTEN(&imap))
+ xfs_map_buffer(inode, bh_result, &imap, offset);
+ if (create && ISUNWRITTEN(&imap)) {
if (direct)
bh_result->b_private = inode;
set_buffer_unwritten(bh_result);
if (create &&
((!buffer_mapped(bh_result) && !buffer_uptodate(bh_result)) ||
(offset >= i_size_read(inode)) ||
- (iomap.iomap_flags & (IOMAP_NEW|IOMAP_UNWRITTEN))))
+ (new || ISUNWRITTEN(&imap))))
set_buffer_new(bh_result);
- if (iomap.iomap_bn == DELAYSTARTBLOCK) {
+ if (imap.br_startblock == DELAYSTARTBLOCK) {
BUG_ON(direct);
if (create) {
set_buffer_uptodate(bh_result);
if (direct || size > (1 << inode->i_blkbits)) {
struct xfs_mount *mp = XFS_I(inode)->i_mount;
- xfs_off_t iomap_offset = XFS_FSB_TO_B(mp, iomap.iomap_offset);
+ xfs_off_t iomap_offset = XFS_FSB_TO_B(mp, imap.br_startoff);
xfs_off_t iomap_delta = offset - iomap_offset;
- xfs_off_t iomap_bsize = XFS_FSB_TO_B(mp, iomap.iomap_bsize);
+ xfs_off_t iomap_bsize = XFS_FSB_TO_B(mp, imap.br_blockcount);
ASSERT(iomap_bsize - iomap_delta > 0);
offset = min_t(xfs_off_t,
#define XFS_STRAT_WRITE_IMAPS 2
#define XFS_WRITE_IMAPS XFS_BMAP_MAX_NMAP
-STATIC void
-xfs_imap_to_bmap(
- xfs_inode_t *ip,
- xfs_off_t offset,
- xfs_bmbt_irec_t *imap,
- xfs_iomap_t *iomapp,
- int imaps, /* Number of imap entries */
- int flags)
-{
- iomapp->iomap_offset = imap->br_startoff;
- iomapp->iomap_bsize = imap->br_blockcount;
- iomapp->iomap_flags = flags;
- iomapp->iomap_bn = imap->br_startblock;
-
- if (imap->br_startblock != HOLESTARTBLOCK &&
- imap->br_startblock != DELAYSTARTBLOCK &&
- ISUNWRITTEN(imap))
- iomapp->iomap_flags |= IOMAP_UNWRITTEN;
-}
-
int
xfs_iomap(
- xfs_inode_t *ip,
- xfs_off_t offset,
- ssize_t count,
- int flags,
- xfs_iomap_t *iomapp,
- int *niomaps)
+ struct xfs_inode *ip,
+ xfs_off_t offset,
+ ssize_t count,
+ int flags,
+ struct xfs_bmbt_irec *imap,
+ int *nimaps,
+ int *new)
{
- xfs_mount_t *mp = ip->i_mount;
- xfs_fileoff_t offset_fsb, end_fsb;
- int error = 0;
- int lockmode = 0;
- xfs_bmbt_irec_t imap;
- int nimaps = 1;
- int bmapi_flags = 0;
- int iomap_flags = 0;
+ struct xfs_mount *mp = ip->i_mount;
+ xfs_fileoff_t offset_fsb, end_fsb;
+ int error = 0;
+ int lockmode = 0;
+ int bmapi_flags = 0;
ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFREG);
- ASSERT(niomaps && *niomaps == 1);
+
+ *new = 0;
if (XFS_FORCED_SHUTDOWN(mp))
return XFS_ERROR(EIO);
error = xfs_bmapi(NULL, ip, offset_fsb,
(xfs_filblks_t)(end_fsb - offset_fsb),
- bmapi_flags, NULL, 0, &imap,
- &nimaps, NULL, NULL);
+ bmapi_flags, NULL, 0, imap,
+ nimaps, NULL, NULL);
if (error)
goto out;
switch (flags & (BMAPI_WRITE|BMAPI_ALLOCATE)) {
case BMAPI_WRITE:
/* If we found an extent, return it */
- if (nimaps &&
- (imap.br_startblock != HOLESTARTBLOCK) &&
- (imap.br_startblock != DELAYSTARTBLOCK)) {
- trace_xfs_iomap_found(ip, offset, count, flags, &imap);
+ if (*nimaps &&
+ (imap->br_startblock != HOLESTARTBLOCK) &&
+ (imap->br_startblock != DELAYSTARTBLOCK)) {
+ trace_xfs_iomap_found(ip, offset, count, flags, imap);
break;
}
if (flags & (BMAPI_DIRECT|BMAPI_MMAP)) {
error = xfs_iomap_write_direct(ip, offset, count, flags,
- &imap, &nimaps, nimaps);
+ imap, nimaps, *nimaps);
} else {
error = xfs_iomap_write_delay(ip, offset, count, flags,
- &imap, &nimaps);
+ imap, nimaps);
}
if (!error) {
- trace_xfs_iomap_alloc(ip, offset, count, flags, &imap);
+ trace_xfs_iomap_alloc(ip, offset, count, flags, imap);
}
- iomap_flags = IOMAP_NEW;
+ *new = 1;
break;
case BMAPI_ALLOCATE:
/* If we found an extent, return it */
xfs_iunlock(ip, lockmode);
lockmode = 0;
- if (nimaps && !isnullstartblock(imap.br_startblock)) {
- trace_xfs_iomap_found(ip, offset, count, flags, &imap);
+ if (*nimaps && !isnullstartblock(imap->br_startblock)) {
+ trace_xfs_iomap_found(ip, offset, count, flags, imap);
break;
}
error = xfs_iomap_write_allocate(ip, offset, count,
- &imap, &nimaps);
+ imap, nimaps);
break;
}
- ASSERT(nimaps <= 1);
-
- if (nimaps)
- xfs_imap_to_bmap(ip, offset, &imap, iomapp, nimaps, iomap_flags);
- *niomaps = nimaps;
+ ASSERT(*nimaps <= 1);
out:
if (lockmode)
return XFS_ERROR(error);
}
-
STATIC int
xfs_iomap_eof_align_last_fsb(
xfs_mount_t *mp,
{ BMAPI_MMAP, "MMAP" }, \
{ BMAPI_TRYLOCK, "TRYLOCK" }
-/*
- * xfs_iomap_t: File system I/O map
- *
- * The iomap_bn field is expressed in 512-byte blocks, and is where the
- * mapping starts on disk.
- *
- * The iomap_offset, iomap_bsize and iomap_delta fields are in bytes.
- * iomap_offset is the offset of the mapping in the file itself.
- * iomap_bsize is the size of the mapping, iomap_delta is the
- * desired data's offset into the mapping, given the offset supplied
- * to the file I/O map routine.
- *
- * When a request is made to read beyond the logical end of the object,
- * iomap_size may be set to 0, but iomap_offset and iomap_length should be set
- * to the actual amount of underlying storage that has been allocated, if any.
- */
-
-typedef struct xfs_iomap {
- xfs_daddr_t iomap_bn; /* first 512B blk of mapping */
- xfs_off_t iomap_offset; /* offset of mapping, bytes */
- xfs_off_t iomap_bsize; /* size of mapping, bytes */
- iomap_flags_t iomap_flags;
-} xfs_iomap_t;
-
struct xfs_inode;
struct xfs_bmbt_irec;
extern int xfs_iomap(struct xfs_inode *, xfs_off_t, ssize_t, int,
- struct xfs_iomap *, int *);
+ struct xfs_bmbt_irec *, int *, int *);
extern int xfs_iomap_write_direct(struct xfs_inode *, xfs_off_t, size_t,
int, struct xfs_bmbt_irec *, int *, int);
extern int xfs_iomap_write_delay(struct xfs_inode *, xfs_off_t, size_t, int,
git.openpandora.org / pandora-kernel.git / commitdiff