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Merge pull request #80 from datomia/fix-write-cache

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MODE SENSE: ALLOCATION LENGTH shouldn't affect a size in response
This commit is contained in:
Lei Xue
2019-06-03 09:28:16 +08:00
committed by GitHub
parent e2192b7b01 c8962b89db
commit 932dc38110
2 changed files with 22 additions and 32 deletions
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2
pkg/scsi/sbc.go
View File

@@ -101,7 +101,7 @@ func (sbc SBCSCSIDeviceProtocol) InitLu(lu *api.SCSILu) error {
// Disconnect page
pages = append(pages, api.ModePage{2, 0, 14, []byte{0x80, 0x80, 0, 0xa, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}})
// Caching Page
pages = append(pages, api.ModePage{8, 0, 18, []byte{0x14, 0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0, 0x4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}})
pages = append(pages, api.ModePage{8, 0, 18, []byte{0x14, 0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0}})
// Control page
pages = append(pages, api.ModePage{0x0a, 0, 10, []byte{2, 0x10, 0, 0, 0, 0, 0, 0, 2, 0, 0x08, 0, 0, 0, 0, 0, 0, 0}})

52
pkg/scsi/spc.go
View File

@@ -476,9 +476,9 @@ func SPCModeSense(host int, cmd *api.SCSICommand) api.SAMStat {
asc = ASC_INVALID_FIELD_IN_CDB
data []byte
allocLen uint32
remainLen uint32
i uint32
)
if dbd == 0 {
blkDesctionLen = 8
}
@@ -499,22 +499,15 @@ func SPCModeSense(host int, cmd *api.SCSICommand) api.SAMStat {
data = append(data, 0x00)
}
}
remainLen = allocLen - uint32(len(data))
if dbd == 0 && remainLen >= 8 {
if dbd == 0 {
data = append(data, cmd.Device.ModeBlockDescriptor...)
}
if pcode == 0x3f {
for _, pg := range cmd.Device.ModePages {
if pg.SubPageCode == 0 {
if remainLen < 2+uint32(pg.Size) {
break
}
data = append(data, pg.PageCode)
data = append(data, pg.Size)
} else {
if remainLen < 4+uint32(pg.Size) {
break
}
data = append(data, pg.PageCode|0x40)
data = append(data, pg.SubPageCode)
data = append(data, (pg.Size>>8)&0xff)
@@ -537,27 +530,24 @@ func SPCModeSense(host int, cmd *api.SCSICommand) api.SAMStat {
if pg == nil {
goto sense
}
if remainLen >= 2+uint32(pg.Size) {
if pg.SubPageCode == 0 {
data = append(data, pg.PageCode)
data = append(data, pg.Size)
if pctrl == 1 {
data = append(data, pg.Data[pg.Size:]...)
} else {
data = append(data, pg.Data[:pg.Size]...)
}
} else if remainLen >= 4+uint32(pg.Size) {
data = append(data, pg.PageCode|0x40)
data = append(data, pg.SubPageCode)
data = append(data, (pg.Size>>8)&0xff)
data = append(data, pg.Size&0xff)
if pctrl == 1 {
data = append(data, pg.Data[pg.Size:]...)
} else {
data = append(data, pg.Data[:pg.Size]...)
}
if pg.SubPageCode == 0 {
data = append(data, pg.PageCode)
data = append(data, pg.Size)
if pctrl == 1 {
data = append(data, pg.Data[pg.Size:]...)
} else {
data = append(data, pg.Data[:pg.Size]...)
}
} else {
data = append(data, pg.PageCode|0x40)
data = append(data, pg.SubPageCode)
data = append(data, (pg.Size>>8)&0xff)
data = append(data, pg.Size&0xff)
if pctrl == 1 {
data = append(data, pg.Data[pg.Size:]...)
} else {
data = append(data, pg.Data[:pg.Size]...)
}
}
}
if mode6 {
@@ -569,8 +559,8 @@ func SPCModeSense(host int, cmd *api.SCSICommand) api.SAMStat {
data[6] = uint8(blkDesctionLen >> 8)
data[7] = uint8(blkDesctionLen)
}
if rlen := uint32(len(data)); rlen < allocLen {
cmd.InSDBBuffer.Resid = rlen
if rlen := uint32(len(data)); rlen > allocLen {
cmd.InSDBBuffer.Resid = allocLen
}
copy(cmd.InSDBBuffer.Buffer, data)
return api.SAMStatGood