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author | Daisuke HATAYAMA <d.hatayama@jp.fujitsu.com> | 2010-03-05 13:44:06 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-06 11:26:45 -0800 |
commit | 088e7af73a962fcc8883b7a6392544d8342553d6 (patch) | |
tree | 5dce5b991cad1071522b464bd83943a1b6e885b2 /include/linux/coredump.h | |
parent | 05f47fda9fc5b17bfab189e9d54228025befc996 (diff) | |
download | linux-stable-088e7af73a962fcc8883b7a6392544d8342553d6.tar.gz linux-stable-088e7af73a962fcc8883b7a6392544d8342553d6.tar.bz2 linux-stable-088e7af73a962fcc8883b7a6392544d8342553d6.zip |
coredump: move dump_write() and dump_seek() into a header file
My next patch will replace ELF_CORE_EXTRA_* macros by functions, putting
them into other newly created *.c files. Then, each files will contain
dump_write(), where each pair of binfmt_*.c and elfcore.c should be the
same. So, this patch moves them into a header file with dump_seek().
Also, the patch deletes confusing DUMP_WRITE macros in each files.
Signed-off-by: Daisuke HATAYAMA <d.hatayama@jp.fujitsu.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Greg Ungerer <gerg@snapgear.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/coredump.h')
-rw-r--r-- | include/linux/coredump.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/include/linux/coredump.h b/include/linux/coredump.h new file mode 100644 index 000000000000..b3c91d7cede4 --- /dev/null +++ b/include/linux/coredump.h @@ -0,0 +1,41 @@ +#ifndef _LINUX_COREDUMP_H +#define _LINUX_COREDUMP_H + +#include <linux/types.h> +#include <linux/mm.h> +#include <linux/fs.h> + +/* + * These are the only things you should do on a core-file: use only these + * functions to write out all the necessary info. + */ +static inline int dump_write(struct file *file, const void *addr, int nr) +{ + return file->f_op->write(file, addr, nr, &file->f_pos) == nr; +} + +static inline int dump_seek(struct file *file, loff_t off) +{ + if (file->f_op->llseek && file->f_op->llseek != no_llseek) { + if (file->f_op->llseek(file, off, SEEK_CUR) < 0) + return 0; + } else { + char *buf = (char *)get_zeroed_page(GFP_KERNEL); + + if (!buf) + return 0; + while (off > 0) { + unsigned long n = off; + + if (n > PAGE_SIZE) + n = PAGE_SIZE; + if (!dump_write(file, buf, n)) + return 0; + off -= n; + } + free_page((unsigned long)buf); + } + return 1; +} + +#endif /* _LINUX_COREDUMP_H */ |