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c2d466b9fe
In preparation for removing the strlcat API[1], replace the char *pp_buf
with a struct seq_buf, which tracks the current write position and
remaining space internally. This allows for:
- Direct use of seq_buf_printf() in place of snprintf()+strlcat()
pairs, eliminating local tmp buffers throughout.
- Adjacent strlcat() calls that build strings piece-by-piece
(e.g., strlcat("["); strlcat(name); strlcat("]")) to be collapsed
into single seq_buf_printf() calls.
- Simpler call sites: seq_buf_puts() takes only the buffer and string,
with no need to pass PAGE_SIZE at every call.
The backing buffer allocation is unchanged (__get_free_page), and the
output path uses seq_buf_str() to NUL-terminate before passing to
printk().
Link: https://github.com/KSPP/linux/issues/370 [1]
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Josh Law <objecting@objecting.org>
Signed-off-by: Kees Cook <kees@kernel.org>
Reviewed-by: Josh Law <objecting@objecting.org>
Link: https://patch.msgid.link/20260321004840.work.670-kees@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* fs/partitions/ultrix.c
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*
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* Code extracted from drivers/block/genhd.c
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*
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* Re-organised Jul 1999 Russell King
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*/
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#include "check.h"
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int ultrix_partition(struct parsed_partitions *state)
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{
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int i;
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Sector sect;
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unsigned char *data;
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struct ultrix_disklabel {
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s32 pt_magic; /* magic no. indicating part. info exits */
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s32 pt_valid; /* set by driver if pt is current */
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struct pt_info {
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s32 pi_nblocks; /* no. of sectors */
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u32 pi_blkoff; /* block offset for start */
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} pt_part[8];
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} *label;
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#define PT_MAGIC 0x032957 /* Partition magic number */
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#define PT_VALID 1 /* Indicates if struct is valid */
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data = read_part_sector(state, (16384 - sizeof(*label))/512, §);
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if (!data)
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return -1;
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label = (struct ultrix_disklabel *)(data + 512 - sizeof(*label));
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if (label->pt_magic == PT_MAGIC && label->pt_valid == PT_VALID) {
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for (i=0; i<8; i++)
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if (label->pt_part[i].pi_nblocks)
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put_partition(state, i+1,
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label->pt_part[i].pi_blkoff,
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label->pt_part[i].pi_nblocks);
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put_dev_sector(sect);
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seq_buf_puts(&state->pp_buf, "\n");
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return 1;
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} else {
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put_dev_sector(sect);
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return 0;
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}
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}
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