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Merge patch series "scsi: aacraid: struct sgmap: Replace 1-element arrays with flexible arrays"

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Kees Cook <kees@kernel.org> says:

This replaces some of the last remaining uses in the kernel of
1-element "fake" flexible arrays with modern C99 flexible arrays. Some
refactoring is done to ease this, and binary differences are
identified. For the on stack size changes in patch 2, the "yes, that
is the source of the binary differences" debugging patch can be found
here[1].

[1] https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git/commit/?h=dev/v6.10-rc2/1-element&id=45e6226bcbc5e982541754eca7ac29f403e82f5e

Link: https://lore.kernel.org/r/20240711212732.work.162-kees@kernel.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Martin K. Petersen 2024-08-02 21:39:30 -04:00
commit 15f7b71b9d
5 changed files with 24 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
drivers/scsi/aacraid/aachba.c
View File

@ -1267,7 +1267,7 @@ static int aac_read_raw_io(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u3
return ret;
command = ContainerRawIo;
fibsize = sizeof(struct aac_raw_io) +
((le32_to_cpu(readcmd->sg.count)-1) * sizeof(struct sgentryraw));
(le32_to_cpu(readcmd->sg.count) * sizeof(struct sgentryraw));
}
BUG_ON(fibsize > (fib->dev->max_fib_size - sizeof(struct aac_fibhdr)));
@ -1302,7 +1302,7 @@ static int aac_read_block64(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u
if (ret < 0)
return ret;
fibsize = sizeof(struct aac_read64) +
((le32_to_cpu(readcmd->sg.count) - 1) *
(le32_to_cpu(readcmd->sg.count) *
sizeof (struct sgentry64));
BUG_ON (fibsize > (fib->dev->max_fib_size -
sizeof(struct aac_fibhdr)));
@ -1337,7 +1337,7 @@ static int aac_read_block(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u32
if (ret < 0)
return ret;
fibsize = sizeof(struct aac_read) +
((le32_to_cpu(readcmd->sg.count) - 1) *
(le32_to_cpu(readcmd->sg.count) *
sizeof (struct sgentry));
BUG_ON (fibsize > (fib->dev->max_fib_size -
sizeof(struct aac_fibhdr)));
@ -1401,7 +1401,7 @@ static int aac_write_raw_io(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u
return ret;
command = ContainerRawIo;
fibsize = sizeof(struct aac_raw_io) +
((le32_to_cpu(writecmd->sg.count)-1) * sizeof (struct sgentryraw));
(le32_to_cpu(writecmd->sg.count) * sizeof(struct sgentryraw));
}
BUG_ON(fibsize > (fib->dev->max_fib_size - sizeof(struct aac_fibhdr)));
@ -1436,7 +1436,7 @@ static int aac_write_block64(struct fib * fib, struct scsi_cmnd * cmd, u64 lba,
if (ret < 0)
return ret;
fibsize = sizeof(struct aac_write64) +
((le32_to_cpu(writecmd->sg.count) - 1) *
(le32_to_cpu(writecmd->sg.count) *
sizeof (struct sgentry64));
BUG_ON (fibsize > (fib->dev->max_fib_size -
sizeof(struct aac_fibhdr)));
@ -1473,7 +1473,7 @@ static int aac_write_block(struct fib * fib, struct scsi_cmnd * cmd, u64 lba, u3
if (ret < 0)
return ret;
fibsize = sizeof(struct aac_write) +
((le32_to_cpu(writecmd->sg.count) - 1) *
(le32_to_cpu(writecmd->sg.count) *
sizeof (struct sgentry));
BUG_ON (fibsize > (fib->dev->max_fib_size -
sizeof(struct aac_fibhdr)));
@ -1592,9 +1592,9 @@ static int aac_scsi_64(struct fib * fib, struct scsi_cmnd * cmd)
/*
* Build Scatter/Gather list
*/
fibsize = sizeof (struct aac_srb) - sizeof (struct sgentry) +
fibsize = sizeof(struct aac_srb) +
((le32_to_cpu(srbcmd->sg.count) & 0xff) *
sizeof (struct sgentry64));
sizeof(struct sgentry64));
BUG_ON (fibsize > (fib->dev->max_fib_size -
sizeof(struct aac_fibhdr)));
@ -1624,7 +1624,7 @@ static int aac_scsi_32(struct fib * fib, struct scsi_cmnd * cmd)
* Build Scatter/Gather list
*/
fibsize = sizeof (struct aac_srb) +
(((le32_to_cpu(srbcmd->sg.count) & 0xff) - 1) *
((le32_to_cpu(srbcmd->sg.count) & 0xff) *
sizeof (struct sgentry));
BUG_ON (fibsize > (fib->dev->max_fib_size -
sizeof(struct aac_fibhdr)));
@ -1693,8 +1693,7 @@ static int aac_send_safw_bmic_cmd(struct aac_dev *dev,
fibptr->hw_fib_va->header.XferState &=
~cpu_to_le32(FastResponseCapable);
fibsize = sizeof(struct aac_srb) - sizeof(struct sgentry) +
sizeof(struct sgentry64);
fibsize = sizeof(struct aac_srb) + sizeof(struct sgentry64);
/* allocate DMA buffer for response */
addr = dma_map_single(&dev->pdev->dev, xfer_buf, xfer_len,
@ -2267,7 +2266,7 @@ int aac_get_adapter_info(struct aac_dev* dev)
dev->a_ops.adapter_bounds = aac_bounds_32;
dev->scsi_host_ptr->sg_tablesize = (dev->max_fib_size -
sizeof(struct aac_fibhdr) -
sizeof(struct aac_write) + sizeof(struct sgentry)) /
sizeof(struct aac_write)) /
sizeof(struct sgentry);
if (dev->dac_support) {
dev->a_ops.adapter_read = aac_read_block64;
@ -2278,8 +2277,7 @@ int aac_get_adapter_info(struct aac_dev* dev)
dev->scsi_host_ptr->sg_tablesize =
(dev->max_fib_size -
sizeof(struct aac_fibhdr) -
sizeof(struct aac_write64) +
sizeof(struct sgentry64)) /
sizeof(struct aac_write64)) /
sizeof(struct sgentry64);
} else {
dev->a_ops.adapter_read = aac_read_block;

17
drivers/scsi/aacraid/aacraid.h
View File

@ -507,32 +507,27 @@ struct sge_ieee1212 {
struct sgmap {
__le32 count;
struct sgentry sg[1];
struct sgentry sg[];
};
struct user_sgmap {
u32 count;
struct user_sgentry sg[1];
struct user_sgentry sg[];
};
struct sgmap64 {
__le32 count;
struct sgentry64 sg[1];
struct sgentry64 sg[];
};
struct user_sgmap64 {
u32 count;
struct user_sgentry64 sg[1];
struct user_sgentry64 sg[];
};
struct sgmapraw {
__le32 count;
struct sgentryraw sg[1];
};
struct user_sgmapraw {
u32 count;
struct user_sgentryraw sg[1];
struct sgentryraw sg[];
};
struct creation_info
@ -2029,8 +2024,8 @@ struct aac_srb_reply
};
struct aac_srb_unit {
struct aac_srb srb;
struct aac_srb_reply srb_reply;
struct aac_srb srb;
};
/*

4
drivers/scsi/aacraid/commctrl.c
View File

@ -523,7 +523,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
goto cleanup;
}
if ((fibsize < (sizeof(struct user_aac_srb) - sizeof(struct user_sgentry))) ||
if ((fibsize < sizeof(struct user_aac_srb)) ||
(fibsize > (dev->max_fib_size - sizeof(struct aac_fibhdr)))) {
rcode = -EINVAL;
goto cleanup;
@ -561,7 +561,7 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
rcode = -EINVAL;
goto cleanup;
}
actual_fibsize = sizeof(struct aac_srb) - sizeof(struct sgentry) +
actual_fibsize = sizeof(struct aac_srb) +
((user_srbcmd->sg.count & 0xff) * sizeof(struct sgentry));
actual_fibsize64 = actual_fibsize + (user_srbcmd->sg.count & 0xff) *
(sizeof(struct sgentry64) - sizeof(struct sgentry));

3
drivers/scsi/aacraid/comminit.c
View File

@ -522,8 +522,7 @@ struct aac_dev *aac_init_adapter(struct aac_dev *dev)
spin_lock_init(&dev->iq_lock);
dev->max_fib_size = sizeof(struct hw_fib);
dev->sg_tablesize = host->sg_tablesize = (dev->max_fib_size
- sizeof(struct aac_fibhdr)
- sizeof(struct aac_write) + sizeof(struct sgentry))
- sizeof(struct aac_fibhdr) - sizeof(struct aac_write))
/ sizeof(struct sgentry);
dev->comm_interface = AAC_COMM_PRODUCER;
dev->raw_io_interface = dev->raw_io_64 = 0;

5
drivers/scsi/aacraid/commsup.c
View File

@ -2327,8 +2327,9 @@ static int aac_send_wellness_command(struct aac_dev *dev, char *wellness_str,
sg64->sg[0].addr[0] = cpu_to_le32((u32)(addr & 0xffffffff));
sg64->sg[0].count = cpu_to_le32(datasize);
ret = aac_fib_send(ScsiPortCommand64, fibptr, sizeof(struct aac_srb),
FsaNormal, 1, 1, NULL, NULL);
ret = aac_fib_send(ScsiPortCommand64, fibptr,
sizeof(struct aac_srb) + sizeof(struct sgentry),
FsaNormal, 1, 1, NULL, NULL);
dma_free_coherent(&dev->pdev->dev, datasize, dma_buf, addr);