[SCM] Samba Shared Repository - branch master updated
Jeremy Allison
jra at samba.org
Mon Apr 5 15:17:00 MDT 2010
The branch, master has been updated
via c75184b... Fix issue with aio where r/w lock wasn't kept across aio read operations.
from 2754a8e... Fix related to bug #7326 - can't read/write any files with full_audit
http://gitweb.samba.org/?p=samba.git;a=shortlog;h=master
- Log -----------------------------------------------------------------
commit c75184b8a14ee686dacbf2dcf01eeade0327b648
Author: Jeremy Allison <jra at samba.org>
Date: Mon Apr 5 14:16:21 2010 -0700
Fix issue with aio where r/w lock wasn't kept across aio read operations.
Change schedule_aio_read_and_X/schedule_aio_write_and_X to
return NTSTATUS. Move the grant and release of the lock into
the aio code.
Jeremy
-----------------------------------------------------------------------
Summary of changes:
source3/include/proto.h | 4 +-
source3/smbd/aio.c | 79 +++++++++++++++++++++++++++++++++-------------
source3/smbd/reply.c | 78 +++++++++++++++++++++++++++++++---------------
3 files changed, 110 insertions(+), 51 deletions(-)
Changeset truncated at 500 lines:
diff --git a/source3/include/proto.h b/source3/include/proto.h
index c9fe610..7e45fed 100644
--- a/source3/include/proto.h
+++ b/source3/include/proto.h
@@ -6047,11 +6047,11 @@ struct regval_ctr *svcctl_fetch_regvalues( const char *name, NT_USER_TOKEN *toke
/* The following definitions come from smbd/aio.c */
-bool schedule_aio_read_and_X(connection_struct *conn,
+NTSTATUS schedule_aio_read_and_X(connection_struct *conn,
struct smb_request *req,
files_struct *fsp, SMB_OFF_T startpos,
size_t smb_maxcnt);
-bool schedule_aio_write_and_X(connection_struct *conn,
+NTSTATUS schedule_aio_write_and_X(connection_struct *conn,
struct smb_request *req,
files_struct *fsp, char *data,
SMB_OFF_T startpos,
diff --git a/source3/smbd/aio.c b/source3/smbd/aio.c
index a04f3d5..e172b27 100644
--- a/source3/smbd/aio.c
+++ b/source3/smbd/aio.c
@@ -81,6 +81,7 @@ struct aio_extra {
files_struct *fsp;
struct smb_request *req;
char *outbuf;
+ struct lock_struct lock;
int (*handle_completion)(struct aio_extra *ex, int errcode);
};
@@ -145,7 +146,7 @@ static struct aio_extra *find_aio_ex(uint16 mid)
Set up an aio request from a SMBreadX call.
*****************************************************************************/
-bool schedule_aio_read_and_X(connection_struct *conn,
+NTSTATUS schedule_aio_read_and_X(connection_struct *conn,
struct smb_request *req,
files_struct *fsp, SMB_OFF_T startpos,
size_t smb_maxcnt)
@@ -159,7 +160,7 @@ bool schedule_aio_read_and_X(connection_struct *conn,
if (fsp->base_fsp != NULL) {
/* No AIO on streams yet */
DEBUG(10, ("AIO on streams not yet supported\n"));
- return false;
+ return NT_STATUS_RETRY;
}
if ((!min_aio_read_size || (smb_maxcnt < min_aio_read_size))
@@ -169,20 +170,20 @@ bool schedule_aio_read_and_X(connection_struct *conn,
"for minimum aio_read of %u\n",
(unsigned int)smb_maxcnt,
(unsigned int)min_aio_read_size ));
- return False;
+ return NT_STATUS_RETRY;
}
/* Only do this on non-chained and non-chaining reads not using the
* write cache. */
if (req_is_in_chain(req) || (lp_write_cache_size(SNUM(conn)) != 0)) {
- return False;
+ return NT_STATUS_RETRY;
}
if (outstanding_aio_calls >= aio_pending_size) {
DEBUG(10,("schedule_aio_read_and_X: Already have %d aio "
"activities outstanding.\n",
outstanding_aio_calls ));
- return False;
+ return NT_STATUS_RETRY;
}
/* The following is safe from integer wrap as we've already checked
@@ -195,7 +196,7 @@ bool schedule_aio_read_and_X(connection_struct *conn,
if ((aio_ex = create_aio_extra(fsp, bufsize)) == NULL) {
DEBUG(10,("schedule_aio_read_and_X: malloc fail.\n"));
- return False;
+ return NT_STATUS_NO_MEMORY;
}
aio_ex->handle_completion = handle_aio_read_complete;
@@ -203,6 +204,16 @@ bool schedule_aio_read_and_X(connection_struct *conn,
srv_set_message(aio_ex->outbuf, 12, 0, True);
SCVAL(aio_ex->outbuf,smb_vwv0,0xFF); /* Never a chained reply. */
+ init_strict_lock_struct(fsp, (uint32)req->smbpid,
+ (uint64_t)startpos, (uint64_t)smb_maxcnt, READ_LOCK,
+ &aio_ex->lock);
+
+ /* Take the lock until the AIO completes. */
+ if (!SMB_VFS_STRICT_LOCK(conn, fsp, &aio_ex->lock)) {
+ TALLOC_FREE(aio_ex);
+ return NT_STATUS_FILE_LOCK_CONFLICT;
+ }
+
a = &aio_ex->acb;
/* Now set up the aio record for the read call. */
@@ -219,8 +230,9 @@ bool schedule_aio_read_and_X(connection_struct *conn,
if (ret == -1) {
DEBUG(0,("schedule_aio_read_and_X: aio_read failed. "
"Error %s\n", strerror(errno) ));
+ SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
TALLOC_FREE(aio_ex);
- return False;
+ return NT_STATUS_RETRY;
}
outstanding_aio_calls++;
@@ -231,14 +243,14 @@ bool schedule_aio_read_and_X(connection_struct *conn,
fsp_str_dbg(fsp), (double)startpos, (unsigned int)smb_maxcnt,
(unsigned int)aio_ex->req->mid ));
- return True;
+ return NT_STATUS_OK;
}
/****************************************************************************
Set up an aio request from a SMBwriteX call.
*****************************************************************************/
-bool schedule_aio_write_and_X(connection_struct *conn,
+NTSTATUS schedule_aio_write_and_X(connection_struct *conn,
struct smb_request *req,
files_struct *fsp, char *data,
SMB_OFF_T startpos,
@@ -254,7 +266,7 @@ bool schedule_aio_write_and_X(connection_struct *conn,
if (fsp->base_fsp != NULL) {
/* No AIO on streams yet */
DEBUG(10, ("AIO on streams not yet supported\n"));
- return false;
+ return NT_STATUS_RETRY;
}
if ((!min_aio_write_size || (numtowrite < min_aio_write_size))
@@ -264,13 +276,13 @@ bool schedule_aio_write_and_X(connection_struct *conn,
"small for minimum aio_write of %u\n",
(unsigned int)numtowrite,
(unsigned int)min_aio_write_size ));
- return False;
+ return NT_STATUS_RETRY;
}
/* Only do this on non-chained and non-chaining reads not using the
* write cache. */
if (req_is_in_chain(req) || (lp_write_cache_size(SNUM(conn)) != 0)) {
- return False;
+ return NT_STATUS_RETRY;
}
if (outstanding_aio_calls >= aio_pending_size) {
@@ -283,7 +295,7 @@ bool schedule_aio_write_and_X(connection_struct *conn,
fsp_str_dbg(fsp), (double)startpos,
(unsigned int)numtowrite,
(unsigned int)req->mid ));
- return False;
+ return NT_STATUS_RETRY;
}
/* Ensure aio is initialized. */
@@ -293,7 +305,7 @@ bool schedule_aio_write_and_X(connection_struct *conn,
if (!(aio_ex = create_aio_extra(fsp, bufsize))) {
DEBUG(0,("schedule_aio_write_and_X: malloc fail.\n"));
- return False;
+ return NT_STATUS_NO_MEMORY;
}
aio_ex->handle_completion = handle_aio_write_complete;
@@ -301,6 +313,16 @@ bool schedule_aio_write_and_X(connection_struct *conn,
srv_set_message(aio_ex->outbuf, 6, 0, True);
SCVAL(aio_ex->outbuf,smb_vwv0,0xFF); /* Never a chained reply. */
+ init_strict_lock_struct(fsp, (uint32)req->smbpid,
+ (uint64_t)startpos, (uint64_t)numtowrite, WRITE_LOCK,
+ &aio_ex->lock);
+
+ /* Take the lock until the AIO completes. */
+ if (!SMB_VFS_STRICT_LOCK(conn, fsp, &aio_ex->lock)) {
+ TALLOC_FREE(aio_ex);
+ return NT_STATUS_FILE_LOCK_CONFLICT;
+ }
+
a = &aio_ex->acb;
/* Now set up the aio record for the write call. */
@@ -317,8 +339,9 @@ bool schedule_aio_write_and_X(connection_struct *conn,
if (ret == -1) {
DEBUG(3,("schedule_aio_wrote_and_X: aio_write failed. "
"Error %s\n", strerror(errno) ));
+ SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
TALLOC_FREE(aio_ex);
- return False;
+ return NT_STATUS_RETRY;
}
outstanding_aio_calls++;
@@ -352,10 +375,9 @@ bool schedule_aio_write_and_X(connection_struct *conn,
fsp_str_dbg(fsp), (double)startpos, (unsigned int)numtowrite,
(unsigned int)aio_ex->req->mid, outstanding_aio_calls ));
- return True;
+ return NT_STATUS_OK;
}
-
/****************************************************************************
Complete the read and return the data or error back to the client.
Returns errno or zero if all ok.
@@ -511,6 +533,7 @@ static int handle_aio_write_complete(struct aio_extra *aio_ex, int errcode)
static bool handle_aio_completed(struct aio_extra *aio_ex, int *perr)
{
+ files_struct *fsp = NULL;
int err;
if(!aio_ex) {
@@ -518,14 +541,21 @@ static bool handle_aio_completed(struct aio_extra *aio_ex, int *perr)
return false;
}
+ fsp = aio_ex->fsp;
+
/* Ensure the operation has really completed. */
- err = SMB_VFS_AIO_ERROR(aio_ex->fsp, &aio_ex->acb);
+ err = SMB_VFS_AIO_ERROR(fsp, &aio_ex->acb);
if (err == EINPROGRESS) {
DEBUG(10,( "handle_aio_completed: operation mid %u still in "
"process for file %s\n",
aio_ex->req->mid, fsp_str_dbg(aio_ex->fsp)));
return False;
- } else if (err == ECANCELED) {
+ }
+
+ /* Unlock now we're done. */
+ SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &aio_ex->lock);
+
+ if (err == ECANCELED) {
/* If error is ECANCELED then don't return anything to the
* client. */
DEBUG(10,( "handle_aio_completed: operation mid %u"
@@ -696,6 +726,9 @@ void cancel_aio_by_fsp(files_struct *fsp)
for( aio_ex = aio_list_head; aio_ex; aio_ex = aio_ex->next) {
if (aio_ex->fsp == fsp) {
+ /* Unlock now we're done. */
+ SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &aio_ex->lock);
+
/* Don't delete the aio_extra record as we may have
completed and don't yet know it. Just do the
aio_cancel call and return. */
@@ -707,21 +740,21 @@ void cancel_aio_by_fsp(files_struct *fsp)
}
#else
-bool schedule_aio_read_and_X(connection_struct *conn,
+NTSTATUS schedule_aio_read_and_X(connection_struct *conn,
struct smb_request *req,
files_struct *fsp, SMB_OFF_T startpos,
size_t smb_maxcnt)
{
- return False;
+ return NT_STATUS_RETRY;
}
-bool schedule_aio_write_and_X(connection_struct *conn,
+NTSTATUS schedule_aio_write_and_X(connection_struct *conn,
struct smb_request *req,
files_struct *fsp, char *data,
SMB_OFF_T startpos,
size_t numtowrite)
{
- return False;
+ return NT_STATUS_RETRY;
}
void cancel_aio_by_fsp(files_struct *fsp)
diff --git a/source3/smbd/reply.c b/source3/smbd/reply.c
index e2aca37..0355cb7 100644
--- a/source3/smbd/reply.c
+++ b/source3/smbd/reply.c
@@ -3698,9 +3698,23 @@ void reply_read_and_X(struct smb_request *req)
}
- if (!big_readX &&
- schedule_aio_read_and_X(conn, req, fsp, startpos, smb_maxcnt)) {
- goto out;
+ if (!big_readX) {
+ NTSTATUS status = schedule_aio_read_and_X(conn,
+ req,
+ fsp,
+ startpos,
+ smb_maxcnt);
+ if (NT_STATUS_IS_OK(status)) {
+ /* Read scheduled - we're done. */
+ goto out;
+ }
+ if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
+ /* Real error - report to client. */
+ END_PROFILE(SMBreadX);
+ reply_nterror(req, status);
+ return;
+ }
+ /* NT_STATUS_RETRY - fall back to sync read. */
}
smbd_lock_socket(smbd_server_conn);
@@ -4320,6 +4334,7 @@ void reply_write_and_X(struct smb_request *req)
unsigned int smblen;
char *data;
NTSTATUS status;
+ int saved_errno = 0;
START_PROFILE(SMBwriteX);
@@ -4414,16 +4429,6 @@ void reply_write_and_X(struct smb_request *req)
#endif /* LARGE_SMB_OFF_T */
}
- init_strict_lock_struct(fsp, (uint32)req->smbpid,
- (uint64_t)startpos, (uint64_t)numtowrite, WRITE_LOCK,
- &lock);
-
- if (!SMB_VFS_STRICT_LOCK(conn, fsp, &lock)) {
- reply_nterror(req, NT_STATUS_FILE_LOCK_CONFLICT);
- END_PROFILE(SMBwriteX);
- return;
- }
-
/* X/Open SMB protocol says that, unlike SMBwrite
if the length is zero then NO truncation is
done, just a write of zero. To truncate a file,
@@ -4432,24 +4437,49 @@ void reply_write_and_X(struct smb_request *req)
if(numtowrite == 0) {
nwritten = 0;
} else {
+ if (req->unread_bytes == 0) {
+ status = schedule_aio_write_and_X(conn,
+ req,
+ fsp,
+ data,
+ startpos,
+ numtowrite);
- if ((req->unread_bytes == 0) &&
- schedule_aio_write_and_X(conn, req, fsp, data, startpos,
- numtowrite)) {
- goto strict_unlock;
+ if (NT_STATUS_IS_OK(status)) {
+ /* write scheduled - we're done. */
+ goto out;
+ }
+ if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
+ /* Real error - report to client. */
+ reply_nterror(req, status);
+ goto out;
+ }
+ /* NT_STATUS_RETRY - fall through to sync write. */
+ }
+
+ init_strict_lock_struct(fsp, (uint32)req->smbpid,
+ (uint64_t)startpos, (uint64_t)numtowrite, WRITE_LOCK,
+ &lock);
+
+ if (!SMB_VFS_STRICT_LOCK(conn, fsp, &lock)) {
+ reply_nterror(req, NT_STATUS_FILE_LOCK_CONFLICT);
+ goto out;
}
nwritten = write_file(req,fsp,data,startpos,numtowrite);
+ saved_errno = errno;
+
+ SMB_VFS_STRICT_UNLOCK(conn, fsp, &lock);
}
if(nwritten < 0) {
- reply_nterror(req, map_nt_error_from_unix(errno));
- goto strict_unlock;
+ reply_nterror(req, map_nt_error_from_unix(saved_errno));
+ goto out;
}
if((nwritten == 0) && (numtowrite != 0)) {
reply_nterror(req, NT_STATUS_DISK_FULL);
- goto strict_unlock;
+ goto out;
}
reply_outbuf(req, 6, 0);
@@ -4469,18 +4499,14 @@ void reply_write_and_X(struct smb_request *req)
DEBUG(5,("reply_write_and_X: sync_file for %s returned %s\n",
fsp_str_dbg(fsp), nt_errstr(status)));
reply_nterror(req, status);
- goto strict_unlock;
+ goto out;
}
- SMB_VFS_STRICT_UNLOCK(conn, fsp, &lock);
-
END_PROFILE(SMBwriteX);
chain_reply(req);
return;
-strict_unlock:
- SMB_VFS_STRICT_UNLOCK(conn, fsp, &lock);
-
+out:
END_PROFILE(SMBwriteX);
return;
}
--
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