On Thu, Oct 22, 2020 at 11:33:05PM -0700, Allison Henderson wrote:
> This patch implements a new set of log printing functions to print the
> ATTRI and ATTRD items and vectors in the log. These will be used during
> log dump and log recover operations.
>
> RFC: Though most attributes are strings, the attribute operations accept
> any binary payload, so we cannot assume them printable. This was done
> intentionally in preparation for parent pointers. And until parent
> pointers get here, attributes have no discernible format. So the print
> routines are just a simple hex dump for now. It's not pretty, but works
> for now.
Perhaps this should print the string if the entire buffer consists of
printable characters?
> Signed-off-by: Allison Henderson <allison.henderson@xxxxxxxxxx>
> ---
> logprint/log_misc.c | 31 +++++++-
> logprint/log_print_all.c | 12 +++
> logprint/log_redo.c | 197 +++++++++++++++++++++++++++++++++++++++++++++++
> logprint/logprint.h | 10 +++
> 4 files changed, 249 insertions(+), 1 deletion(-)
>
> diff --git a/logprint/log_misc.c b/logprint/log_misc.c
> index af927cb..900a75d 100644
> --- a/logprint/log_misc.c
> +++ b/logprint/log_misc.c
> @@ -54,11 +54,29 @@ print_stars(void)
> "***********************************\n");
> } /* print_stars */
>
> +void
> +print_hex_dump(char *ptr, int len) {
> + int i = 0;
> +
> + for (i = 0; i < len; i++) {
> + if (i % 16 == 0)
> + printf("%08x ", i);
> +
> + printf("%02x", ptr[i]);
> +
> + if ((i+1)%16 == 0)
> + printf("\n");
> + else if ((i+1)%2 == 0)
> + printf(" ");
> + }
> + printf("\n");
> +}
> +
> /*
> * Given a pointer to a data segment, print out the data as if it were
> * a log operation header.
> */
> -static void
> +void
> xlog_print_op_header(xlog_op_header_t *op_head,
> int i,
> char **ptr)
> @@ -949,6 +967,17 @@ xlog_print_record(
> be32_to_cpu(op_head->oh_len));
> break;
> }
> + case XFS_LI_ATTRI: {
> + skip = xlog_print_trans_attri(&ptr,
> + be32_to_cpu(op_head->oh_len),
> + &i);
> + break;
> + }
> + case XFS_LI_ATTRD: {
Inconsistent indenting.
Not that this function was a sparkling gem to begin with...
> + skip = xlog_print_trans_attrd(&ptr,
> + be32_to_cpu(op_head->oh_len));
> + break;
> + }
> case XFS_LI_RUI: {
> skip = xlog_print_trans_rui(&ptr,
> be32_to_cpu(op_head->oh_len),
> diff --git a/logprint/log_print_all.c b/logprint/log_print_all.c
> index 1924a0a..2b3f035 100644
> --- a/logprint/log_print_all.c
> +++ b/logprint/log_print_all.c
> @@ -402,6 +402,12 @@ xlog_recover_print_logitem(
> case XFS_LI_EFI:
> xlog_recover_print_efi(item);
> break;
> + case XFS_LI_ATTRD:
> + xlog_recover_print_attrd(item);
> + break;
> + case XFS_LI_ATTRI:
> + xlog_recover_print_attri(item);
> + break;
> case XFS_LI_RUD:
> xlog_recover_print_rud(item);
> break;
> @@ -454,6 +460,12 @@ xlog_recover_print_item(
> case XFS_LI_EFI:
> printf("EFI");
> break;
> + case XFS_LI_ATTRD:
> + printf("ATTRD");
> + break;
> + case XFS_LI_ATTRI:
> + printf("ATTRI");
> + break;
> case XFS_LI_RUD:
> printf("RUD");
> break;
> diff --git a/logprint/log_redo.c b/logprint/log_redo.c
> index 297e203..3e790e2 100644
> --- a/logprint/log_redo.c
> +++ b/logprint/log_redo.c
> @@ -8,6 +8,7 @@
> #include "libxlog.h"
>
> #include "logprint.h"
> +#include "xfs_attr_item.h"
>
> /* Extent Free Items */
>
> @@ -653,3 +654,199 @@ xlog_recover_print_bud(
> f = item->ri_buf[0].i_addr;
> xlog_print_trans_bud(&f, sizeof(struct xfs_bud_log_format));
> }
> +
> +/* Attr Items */
> +
> +static int
> +xfs_attri_copy_log_format(
> + char *buf,
> + uint len,
> + struct xfs_attri_log_format *dst_attri_fmt)
> +{
> + uint dst_len = sizeof(struct xfs_attri_log_format);
> +
> + if (len == dst_len) {
> + memcpy((char *)dst_attri_fmt, buf, len);
> + return 0;
> + }
> +
> + fprintf(stderr, _("%s: bad size of attri format: %u; expected %u\n"),
> + progname, len, dst_len);
> + return 1;
> +}
> +
> +int
> +xlog_print_trans_attri(
> + char **ptr,
> + uint src_len,
> + int *i)
> +{
> + struct xfs_attri_log_format *src_f = NULL;
> + xlog_op_header_t *head = NULL;
> + uint dst_len;
> + int error = 0;
> +
> + dst_len = sizeof(struct xfs_attri_log_format);
> + if (src_len != dst_len) {
> + fprintf(stderr, _("%s: bad size of attri format: %u; expected %u\n"),
> + progname, src_len, dst_len);
> + return 1;
> + }
> +
> + /*
> + * memmove to ensure 8-byte alignment for the long longs in
> + * xfs_attri_log_format_t structure
> + */
> + if ((src_f = (struct xfs_attri_log_format *)malloc(src_len)) == NULL) {
src_f = malloc(src_len);
if (!src_f) {
> + fprintf(stderr, _("%s: xlog_print_trans_attri: malloc failed\n"),
> + progname);
> + exit(1);
> + }
> + memmove((char*)src_f, *ptr, src_len);
> + *ptr += src_len;
> +
> + printf(_("ATTRI: #regs: %d name_len: %d, value_len: %d id: 0x%llx\n"),
> + src_f->alfi_size, src_f->alfi_name_len, src_f->alfi_value_len,
> + (unsigned long long)src_f->alfi_id);
> +
> + if (src_f->alfi_name_len > 0) {
> + printf(_("\n"));
> + (*i)++;
> + head = (xlog_op_header_t *)*ptr;
> + xlog_print_op_header(head, *i, ptr);
> + error = xlog_print_trans_attri_name(ptr, be32_to_cpu(head->oh_len));
> + if (error)
> + goto error;
> + }
> +
> + if (src_f->alfi_value_len > 0) {
> + printf(_("\n"));
> + (*i)++;
> + head = (xlog_op_header_t *)*ptr;
> + xlog_print_op_header(head, *i, ptr);
> + error = xlog_print_trans_attri_value(ptr, be32_to_cpu(head->oh_len),
> + src_f->alfi_value_len);
> + }
> +error:
> + free(src_f);
> +
> + return error;
> +} /* xlog_print_trans_attri */
> +
> +int
> +xlog_print_trans_attri_name(
> + char **ptr,
> + uint src_len)
> +{
> + printf(_("ATTRI: name len:%u\n"), src_len);
> + print_hex_dump(*ptr, src_len);
> +
> + *ptr += src_len;
> +
> + return 0;
> +} /* xlog_print_trans_attri */
> +
> +int
> +xlog_print_trans_attri_value(
> + char **ptr,
> + uint src_len,
> + int value_len)
> +{
> + int len = value_len;
> +
> + if (len > MAX_ATTR_VAL_PRINT)
> + len = MAX_ATTR_VAL_PRINT;
> +
> + printf(_("ATTRI: value len:%u\n"), value_len);
> + print_hex_dump(*ptr, len);
print_hex_dump(*ptr, min(len, MAX_ATTR_VAL_PRINT)); ?
--D
> +
> + *ptr += src_len;
> +
> + return 0;
> +} /* xlog_print_trans_attri_value */
> +
> +void
> +xlog_recover_print_attri(
> + struct xlog_recover_item *item)
> +{
> + struct xfs_attri_log_format *f, *src_f = NULL;
> + uint src_len, dst_len;
> +
> + int region = 0;
> +
> + src_f = (struct xfs_attri_log_format *)item->ri_buf[0].i_addr;
> + src_len = item->ri_buf[region].i_len;
> +
> + /*
> + * An xfs_attri_log_format structure contains a attribute name and
> + * variable length value as the last field.
> + */
> + dst_len = sizeof(struct xfs_attri_log_format);
> +
> + if ((f = ((struct xfs_attri_log_format *)malloc(dst_len))) == NULL) {
> + fprintf(stderr, _("%s: xlog_recover_print_attri: malloc failed\n"),
> + progname);
> + exit(1);
> + }
> + if (xfs_attri_copy_log_format((char*)src_f, src_len, f))
> + goto out;
> +
> + printf(_("ATTRI: #regs: %d name_len: %d, value_len: %d id: 0x%llx\n"),
> + f->alfi_size, f->alfi_name_len, f->alfi_value_len, (unsigned long long)f->alfi_id);
> +
> + if (f->alfi_name_len > 0) {
> + region++;
> + printf(_("ATTRI: name len:%u\n"), f->alfi_name_len);
> + print_hex_dump((char *)item->ri_buf[region].i_addr,
> + f->alfi_name_len);
> + }
> +
> + if (f->alfi_value_len > 0) {
> + int len = f->alfi_value_len;
> +
> + if (len > MAX_ATTR_VAL_PRINT)
> + len = MAX_ATTR_VAL_PRINT;
> +
> + region++;
> + printf(_("ATTRI: value len:%u\n"), f->alfi_value_len);
> + print_hex_dump((char *)item->ri_buf[region].i_addr, len);
> + }
> +
> +out:
> + free(f);
> +
> +}
> +
> +int
> +xlog_print_trans_attrd(char **ptr, uint len)
> +{
> + struct xfs_attrd_log_format *f;
> + struct xfs_attrd_log_format lbuf;
> + uint core_size = sizeof(struct xfs_attrd_log_format);
Indenting issues and whatnot...
> +
> + memcpy(&lbuf, *ptr, MIN(core_size, len));
> + f = &lbuf;
> + *ptr += len;
> + if (len >= core_size) {
> + printf(_("ATTRD: #regs: %d id: 0x%llx\n"),
> + f->alfd_size,
> + (unsigned long long)f->alfd_alf_id);
> + return 0;
> + } else {
> + printf(_("ATTRD: Not enough data to decode further\n"));
> + return 1;
> + }
> +} /* xlog_print_trans_attrd */
> +
> +void
> +xlog_recover_print_attrd(
> + struct xlog_recover_item *item)
> +{
> + struct xfs_attrd_log_format *f;
> +
> + f = (struct xfs_attrd_log_format *)item->ri_buf[0].i_addr;
> +
> + printf(_(" ATTRD: #regs: %d id: 0x%llx\n"),
> + f->alfd_size,
> + (unsigned long long)f->alfd_alf_id);
> +}
> diff --git a/logprint/logprint.h b/logprint/logprint.h
> index ee85bfe..2e256bd 100644
> --- a/logprint/logprint.h
> +++ b/logprint/logprint.h
> @@ -28,6 +28,7 @@ extern void xfs_log_print_trans(struct xlog *, int);
> extern void print_xlog_record_line(void);
> extern void print_xlog_op_line(void);
> extern void print_stars(void);
> +extern void print_hex_dump(char* ptr, int len);
>
> extern struct xfs_inode_log_format *
> xfs_inode_item_format_convert(char *, uint, struct xfs_inode_log_format *);
> @@ -52,4 +53,13 @@ extern void xlog_recover_print_bui(struct xlog_recover_item *item);
> extern int xlog_print_trans_bud(char **ptr, uint len);
> extern void xlog_recover_print_bud(struct xlog_recover_item *item);
>
> +#define MAX_ATTR_VAL_PRINT 128
> +
> +extern int xlog_print_trans_attri(char **ptr, uint src_len, int *i);
> +extern int xlog_print_trans_attri_name(char **ptr, uint src_len);
> +extern int xlog_print_trans_attri_value(char **ptr, uint src_len, int value_len);
> +extern void xlog_recover_print_attri(struct xlog_recover_item *item);
> +extern int xlog_print_trans_attrd(char **ptr, uint len);
> +extern void xlog_recover_print_attrd(struct xlog_recover_item *item);
> +extern void xlog_print_op_header(xlog_op_header_t *op_head, int i, char **ptr);
> #endif /* LOGPRINT_H */
> --
> 2.7.4
>
