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Rebase master to b117

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This commit is contained in:
Brian Behlendorf
2009-07-02 15:44:48 -07:00
parent d164b20935
commit 9babb37438
103 changed files with 7629 additions and 4093 deletions
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module/zfs/zap_micro.c
+79 -5
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@@ -19,12 +19,10 @@
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/spa.h>
#include <sys/dmu.h>
#include <sys/zfs_context.h>
@@ -78,8 +76,8 @@ zap_normalize(zap_t *zap, const char *name, char *namenorm)
err = 0;
(void) u8_textprep_str((char *)name, &inlen, namenorm, &outlen,
zap->zap_normflags | U8_TEXTPREP_IGNORE_NULL, U8_UNICODE_LATEST,
&err);
zap->zap_normflags | U8_TEXTPREP_IGNORE_NULL |
U8_TEXTPREP_IGNORE_INVALID, U8_UNICODE_LATEST, &err);
return (err);
}
@@ -1067,3 +1065,79 @@ zap_get_stats(objset_t *os, uint64_t zapobj, zap_stats_t *zs)
zap_unlockdir(zap);
return (0);
}
int
zap_count_write(objset_t *os, uint64_t zapobj, const char *name, int add,
uint64_t *towrite, uint64_t *tooverwrite, uint64_t dn_datablkshift)
{
zap_t *zap;
int err = 0;
/*
* Since, we don't have a name, we cannot figure out which blocks will
* be affected in this operation. So, account for the worst case :
* - 3 blocks overwritten: target leaf, ptrtbl block, header block
* - 4 new blocks written if adding:
* - 2 blocks for possibly split leaves,
* - 2 grown ptrtbl blocks
*
* This also accomodates the case where an add operation to a fairly
* large microzap results in a promotion to fatzap.
*/
if (name == NULL) {
*towrite += (3 + (add ? 4 : 0)) * SPA_MAXBLOCKSIZE;
return (err);
}
/*
* We lock the zap with adding == FALSE. Because, if we pass
* the actual value of add, it could trigger a mzap_upgrade().
* At present we are just evaluating the possibility of this operation
* and hence we donot want to trigger an upgrade.
*/
err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, &zap);
if (err)
return (err);
if (!zap->zap_ismicro) {
zap_name_t *zn = zap_name_alloc(zap, name, MT_EXACT);
if (zn) {
err = fzap_count_write(zn, add, towrite,
tooverwrite);
zap_name_free(zn);
} else {
/*
* We treat this case as similar to (name == NULL)
*/
*towrite += (3 + (add ? 4 : 0)) * SPA_MAXBLOCKSIZE;
}
} else {
if (!add) {
if (dmu_buf_freeable(zap->zap_dbuf))
*tooverwrite += SPA_MAXBLOCKSIZE;
else
*towrite += SPA_MAXBLOCKSIZE;
} else {
/*
* We are here if we are adding and (name != NULL).
* It is hard to find out if this add will promote this
* microzap to fatzap. Hence, we assume the worst case
* and account for the blocks assuming this microzap
* would be promoted to a fatzap.
*
* 1 block overwritten : header block
* 4 new blocks written : 2 new split leaf, 2 grown
* ptrtbl blocks
*/
if (dmu_buf_freeable(zap->zap_dbuf))
*tooverwrite += 1 << dn_datablkshift;
else
*towrite += 1 << dn_datablkshift;
*towrite += 4 << dn_datablkshift;
}
}
zap_unlockdir(zap);
return (err);
}