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Refresh linux-debug-zerocopy

This commit is contained in:
Brian Behlendorf 2008-12-05 12:20:18 -08:00
parent fd606af35c
commit 766bd8d0e9
4 changed files with 35 additions and 16 deletions
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2
.topdeps
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@ -1 +1 @@
zfs-branch
linux-kernel-module

9
.topmsg
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@ -1,11 +1,6 @@
From: Brian Behlendorf <behlendorf1@llnl.gov>
Subject: [PATCH] linux kernel module
Subject: [PATCH] linux debug zerocopy
Setup linux kernel module support, this includes:
- zfs context for kernel/user
- kernel module build system integration
- kernel module macros
- kernel module symbol export
- kernel module options
Add debug ONLY option for zerocopy
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>

30
zfs/lib/libzpool/dmu.c
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@ -539,8 +539,8 @@ dmu_free_range(objset_t *os, uint64_t object, uint64_t offset,
}
int
dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
void *buf)
dmu_read_impl(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
void *buf, int flags)
{
dnode_t *dn;
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;
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;
size -= tocpy;
@ -596,9 +597,16 @@ dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
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
dmu_write(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
const void *buf, dmu_tx_t *tx)
dmu_write_impl(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
const void *buf, dmu_tx_t *tx, int flags)
{
dmu_buf_t **dbp;
int numbufs, i;
@ -626,7 +634,8 @@ dmu_write(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
else
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)
dmu_buf_fill_done(db, tx);
@ -659,6 +668,13 @@ dmu_prealloc(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
dmu_buf_rele_array(dbp, numbufs, FTAG);
}
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);
}
#ifdef _KERNEL
int
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)
EXPORT_SYMBOL(dmu_bonus_hold);
EXPORT_SYMBOL(dmu_free_range);
EXPORT_SYMBOL(dmu_read_impl);
EXPORT_SYMBOL(dmu_read);
EXPORT_SYMBOL(dmu_write_impl);
EXPORT_SYMBOL(dmu_write);
/* Get information on a DMU object. */

10
zfs/lib/libzpool/include/sys/dmu.h
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@ -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
* operation, including metadata.
*/
#define DMU_MAX_ACCESS (10<<20) /* 10MB */
#define DMU_MAX_DELETEBLKCNT (20480) /* ~5MB of indirect blocks */
#define DMU_MAX_ACCESS (10<<20) /* 10MB */
#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.
@ -472,8 +474,12 @@ int dmu_free_object(objset_t *os, uint64_t object);
* Canfail routines will return 0 on success, or an errno if there is a
* 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,
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,
const void *buf, dmu_tx_t *tx);
void dmu_prealloc(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,