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Merge commit 'refs/top-bases/linux-zfs-branch' into linux-zfs-branch

This commit is contained in:
Brian Behlendorf 2008-12-05 12:41:43 -08:00
parent 94724baa92 fd79d4c796
commit fef35e2756
2 changed files with 35 additions and 9 deletions
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32
zfs/lib/libzpool/dmu.c
View File

@ -539,8 +539,8 @@ dmu_free_range(objset_t *os, uint64_t object, uint64_t offset,
} }
int int
dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, dmu_read_impl(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
void *buf) void *buf, int flags)
{ {
dnode_t *dn; dnode_t *dn;
dmu_buf_t **dbp; dmu_buf_t **dbp;
@ -584,7 +584,8 @@ dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
bufoff = offset - db->db_offset; bufoff = offset - db->db_offset;
tocpy = (int)MIN(db->db_size - bufoff, size); tocpy = (int)MIN(db->db_size - bufoff, size);
bcopy((char *)db->db_data + bufoff, buf, tocpy); if (!(flags & DMU_READ_ZEROCOPY))
bcopy((char *)db->db_data + bufoff, buf, tocpy);
offset += tocpy; offset += tocpy;
size -= tocpy; size -= tocpy;
@ -596,9 +597,16 @@ dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
return (err); return (err);
} }
int
dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
void *buf)
{
return dmu_read_impl(os, object, offset, size, buf, 0);
}
void void
dmu_write(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, dmu_write_impl(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
const void *buf, dmu_tx_t *tx) const void *buf, dmu_tx_t *tx, int flags)
{ {
dmu_buf_t **dbp; dmu_buf_t **dbp;
int numbufs, i; int numbufs, i;
@ -626,7 +634,8 @@ dmu_write(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
else else
dmu_buf_will_dirty(db, tx); dmu_buf_will_dirty(db, tx);
bcopy(buf, (char *)db->db_data + bufoff, tocpy); if (!(flags & DMU_WRITE_ZEROCOPY))
bcopy(buf, (char *)db->db_data + bufoff, tocpy);
if (tocpy == db->db_size) if (tocpy == db->db_size)
dmu_buf_fill_done(db, tx); dmu_buf_fill_done(db, tx);
@ -659,7 +668,14 @@ dmu_prealloc(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
dmu_buf_rele_array(dbp, numbufs, FTAG); dmu_buf_rele_array(dbp, numbufs, FTAG);
} }
#ifdef _KERNEL void
dmu_write(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
const void *buf, dmu_tx_t *tx)
{
dmu_write_impl(os, object, offset, size, buf, tx, 0);
}
#if defined(_KERNEL) && defined(HAVE_UIO_RW)
int int
dmu_read_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size) dmu_read_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size)
{ {
@ -1229,7 +1245,9 @@ dmu_fini(void)
#if defined(_KERNEL) && defined(HAVE_SPL) #if defined(_KERNEL) && defined(HAVE_SPL)
EXPORT_SYMBOL(dmu_bonus_hold); EXPORT_SYMBOL(dmu_bonus_hold);
EXPORT_SYMBOL(dmu_free_range); EXPORT_SYMBOL(dmu_free_range);
EXPORT_SYMBOL(dmu_read_impl);
EXPORT_SYMBOL(dmu_read); EXPORT_SYMBOL(dmu_read);
EXPORT_SYMBOL(dmu_write_impl);
EXPORT_SYMBOL(dmu_write); EXPORT_SYMBOL(dmu_write);
/* Get information on a DMU object. */ /* Get information on a DMU object. */

12
zfs/lib/libzpool/include/sys/dmu.h
View File

@ -154,8 +154,10 @@ void zfs_znode_byteswap(void *buf, size_t size);
* The maximum number of bytes that can be accessed as part of one * The maximum number of bytes that can be accessed as part of one
* operation, including metadata. * operation, including metadata.
*/ */
#define DMU_MAX_ACCESS (10<<20) /* 10MB */ #define DMU_MAX_ACCESS (10<<20) /* 10MB */
#define DMU_MAX_DELETEBLKCNT (20480) /* ~5MB of indirect blocks */ #define DMU_MAX_DELETEBLKCNT (20480) /* ~5MB of indirect blocks */
#define DMU_WRITE_ZEROCOPY 0x0001
#define DMU_READ_ZEROCOPY 0x0002
/* /*
* Public routines to create, destroy, open, and close objsets. * Public routines to create, destroy, open, and close objsets.
@ -472,17 +474,23 @@ int dmu_free_object(objset_t *os, uint64_t object);
* Canfail routines will return 0 on success, or an errno if there is a * Canfail routines will return 0 on success, or an errno if there is a
* nonrecoverable I/O error. * nonrecoverable I/O error.
*/ */
int dmu_read_impl(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
void *buf, int flags);
int dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, int dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
void *buf); void *buf);
void dmu_write_impl(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
const void *buf, dmu_tx_t *tx, int flags);
void dmu_write(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, void dmu_write(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
const void *buf, dmu_tx_t *tx); const void *buf, dmu_tx_t *tx);
void dmu_prealloc(objset_t *os, uint64_t object, uint64_t offset, uint64_t size, void dmu_prealloc(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
dmu_tx_t *tx); dmu_tx_t *tx);
#if defined(_KERNEL) && defined(HAVE_UIO_RW)
int dmu_read_uio(objset_t *os, uint64_t object, struct uio *uio, uint64_t size); int dmu_read_uio(objset_t *os, uint64_t object, struct uio *uio, uint64_t size);
int dmu_write_uio(objset_t *os, uint64_t object, struct uio *uio, uint64_t size, int dmu_write_uio(objset_t *os, uint64_t object, struct uio *uio, uint64_t size,
dmu_tx_t *tx); dmu_tx_t *tx);
int dmu_write_pages(objset_t *os, uint64_t object, uint64_t offset, int dmu_write_pages(objset_t *os, uint64_t object, uint64_t offset,
uint64_t size, struct page *pp, dmu_tx_t *tx); uint64_t size, struct page *pp, dmu_tx_t *tx);
#endif
extern int zfs_prefetch_disable; extern int zfs_prefetch_disable;