Messages in this thread Patch in this message | | | From | "Rafael J. Wysocki" <> | Subject | [PATCH -mm 4/5] swsusp: Add resume_offset command line parameter (rev. 2) | Date | Wed, 27 Sep 2006 07:34:54 +0200 |
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Add the kernel command line parameter "resume_offset=" allowing us to specify the offset, in <PAGE_SIZE> units, from the beginning of the partition pointed to by the "resume=" parameter at which the swap header is located.
This offset can be determined, for example, by an application using the FIBMAP ioctl to obtain the swap header's block number for given file.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> --- kernel/power/disk.c | 15 +++++++++++++++ kernel/power/power.h | 1 + kernel/power/swap.c | 15 ++++++++++----- 3 files changed, 26 insertions(+), 5 deletions(-)
Index: linux-2.6.18-mm1/kernel/power/disk.c =================================================================== --- linux-2.6.18-mm1.orig/kernel/power/disk.c +++ linux-2.6.18-mm1/kernel/power/disk.c @@ -27,6 +27,7 @@ static int noresume = 0; char resume_file[256] = CONFIG_PM_STD_PARTITION; dev_t swsusp_resume_device; +sector_t swsusp_resume_block; /** * power_down - Shut machine down for hibernate. @@ -404,6 +405,19 @@ static int __init resume_setup(char *str return 1; } +static int __init resume_offset_setup(char *str) +{ + sector_t offset; + + if (noresume) + return 1; + + if (sscanf(str, "%llu", &offset) == 1) + swsusp_resume_block = offset; + + return 1; +} + static int __init noresume_setup(char *str) { noresume = 1; @@ -411,4 +425,5 @@ static int __init noresume_setup(char *s } __setup("noresume", noresume_setup); +__setup("resume_offset=", resume_offset_setup); __setup("resume=", resume_setup); Index: linux-2.6.18-mm1/kernel/power/power.h =================================================================== --- linux-2.6.18-mm1.orig/kernel/power/power.h +++ linux-2.6.18-mm1/kernel/power/power.h @@ -42,6 +42,7 @@ extern const void __nosave_begin, __nosa extern unsigned long image_size; extern int in_suspend; extern dev_t swsusp_resume_device; +extern sector_t swsusp_resume_block; extern asmlinkage int swsusp_arch_suspend(void); extern asmlinkage int swsusp_arch_resume(void); Index: linux-2.6.18-mm1/kernel/power/swap.c =================================================================== --- linux-2.6.18-mm1.orig/kernel/power/swap.c +++ linux-2.6.18-mm1/kernel/power/swap.c @@ -160,13 +160,14 @@ static int mark_swapfiles(sector_t start { int error; - bio_read_page(0, &swsusp_header, NULL); + bio_read_page(swsusp_resume_block, &swsusp_header, NULL); if (!memcmp("SWAP-SPACE",swsusp_header.sig, 10) || !memcmp("SWAPSPACE2",swsusp_header.sig, 10)) { memcpy(swsusp_header.orig_sig,swsusp_header.sig, 10); memcpy(swsusp_header.sig,SWSUSP_SIG, 10); swsusp_header.image = start; - error = bio_write_page(0, &swsusp_header, NULL); + error = bio_write_page(swsusp_resume_block, + &swsusp_header, NULL); } else { printk(KERN_ERR "swsusp: Swap header not found!\n"); error = -ENODEV; @@ -183,7 +184,7 @@ static int swsusp_swap_check(void) /* Th { int res; - res = swap_type_of(swsusp_resume_device, 0); + res = swap_type_of(swsusp_resume_device, swsusp_resume_block); if (res < 0) return res; @@ -609,12 +610,16 @@ int swsusp_check(void) if (!IS_ERR(resume_bdev)) { set_blocksize(resume_bdev, PAGE_SIZE); memset(&swsusp_header, 0, sizeof(swsusp_header)); - if ((error = bio_read_page(0, &swsusp_header, NULL))) + error = bio_read_page(swsusp_resume_block, + &swsusp_header, NULL); + if (error) return error; + if (!memcmp(SWSUSP_SIG, swsusp_header.sig, 10)) { memcpy(swsusp_header.sig, swsusp_header.orig_sig, 10); /* Reset swap signature now */ - error = bio_write_page(0, &swsusp_header, NULL); + error = bio_write_page(swsusp_resume_block, + &swsusp_header, NULL); } else { return -EINVAL; } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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