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coredump: reflow dump helpers a little 

They look rather messy right now.

Link: https://lore.kernel.org/20250516-work-coredump-socket-v8-3-664f3caf2516@kernel.org
Acked-by: Luca Boccassi <luca.boccassi@gmail.com>
Reviewed-by: Jann Horn <jannh@google.com>
Reviewed-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2025-05-16 13:25:30 +02:00
parent d4fde206ab
commit 1c587ee610
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
1 changed files with 11 additions and 11 deletions
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22
fs/coredump.c
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@ -864,10 +864,9 @@ static int __dump_emit(struct coredump_params *cprm, const void *addr, int nr)
struct file *file = cprm->file; struct file *file = cprm->file;
loff_t pos = file->f_pos; loff_t pos = file->f_pos;
ssize_t n; ssize_t n;
if (cprm->written + nr > cprm->limit) if (cprm->written + nr > cprm->limit)
return 0; return 0;
if (dump_interrupted()) if (dump_interrupted())
return 0; return 0;
n = __kernel_write(file, addr, nr, &pos); n = __kernel_write(file, addr, nr, &pos);
@ -884,20 +883,21 @@ static int __dump_skip(struct coredump_params *cprm, size_t nr)
{ {
static char zeroes[PAGE_SIZE]; static char zeroes[PAGE_SIZE];
struct file *file = cprm->file; struct file *file = cprm->file;
if (file->f_mode & FMODE_LSEEK) { if (file->f_mode & FMODE_LSEEK) {
if (dump_interrupted() || if (dump_interrupted() || vfs_llseek(file, nr, SEEK_CUR) < 0)
vfs_llseek(file, nr, SEEK_CUR) < 0)
return 0; return 0;
cprm->pos += nr; cprm->pos += nr;
return 1; return 1;
} else {
while (nr > PAGE_SIZE) {
if (!__dump_emit(cprm, zeroes, PAGE_SIZE))
return 0;
nr -= PAGE_SIZE;
}
return __dump_emit(cprm, zeroes, nr);
} }
while (nr > PAGE_SIZE) {
if (!__dump_emit(cprm, zeroes, PAGE_SIZE))
return 0;
nr -= PAGE_SIZE;
}
return __dump_emit(cprm, zeroes, nr);
} }
int dump_emit(struct coredump_params *cprm, const void *addr, int nr) int dump_emit(struct coredump_params *cprm, const void *addr, int nr)