For routines that return a UINT_MAX or UL{L}ONG_MAX, there isn't a way
to get any information as to what went wrong. Set errno in such routines
so that the callers can get some additional context about the error.Reported-by: Lukasz Dorau <[email protected]> Cc: Dan Williams <[email protected]> Signed-off-by: Vishal Verma <[email protected]> --- ndctl/lib/dimm.c | 8 +++-- ndctl/lib/hpe1.c | 79 +++++++++++++++++++++++++++++++++++++------- ndctl/lib/inject.c | 2 ++ ndctl/lib/intel.c | 45 +++++++++++++++++++++---- ndctl/lib/libndctl.c | 54 ++++++++++++++++++++++-------- ndctl/lib/msft.c | 27 ++++++++++++--- 6 files changed, 177 insertions(+), 38 deletions(-) v2: s/EOVERFLOW/ENOMEM/ (Dan) diff --git a/ndctl/lib/dimm.c b/ndctl/lib/dimm.c index b3e032e..5e41734 100644 --- a/ndctl/lib/dimm.c +++ b/ndctl/lib/dimm.c @@ -565,17 +565,21 @@ NDCTL_EXPORT unsigned long ndctl_dimm_get_available_labels( { struct ndctl_ctx *ctx = ndctl_dimm_get_ctx(dimm); char *path = dimm->dimm_buf; - int len = dimm->buf_len; + int rc, len = dimm->buf_len; char buf[20]; if (snprintf(path, len, "%s/available_slots", dimm->dimm_path) >= len) { err(ctx, "%s: buffer too small!\n", ndctl_dimm_get_devname(dimm)); + errno = ENOMEM; return ULONG_MAX; } - if (sysfs_read_attr(ctx, path, buf) < 0) + rc = sysfs_read_attr(ctx, path, buf); + if (rc < 0) { + errno = -rc; return ULONG_MAX; + } return strtoul(buf, NULL, 0); } diff --git a/ndctl/lib/hpe1.c b/ndctl/lib/hpe1.c index dbc1ff0..b26120e 100644 --- a/ndctl/lib/hpe1.c +++ b/ndctl/lib/hpe1.c @@ -90,9 +90,13 @@ static unsigned int hpe1_cmd_smart_get_flags(struct ndctl_cmd *cmd) { unsigned int hpe1flags; unsigned int flags; + int rc; - if (hpe1_smart_valid(cmd) < 0) + rc = hpe1_smart_valid(cmd); + if (rc < 0) { + errno = -rc; return UINT_MAX; + } hpe1flags = CMD_HPE1_SMART(cmd)->out_valid_flags; flags = 0; @@ -118,9 +122,13 @@ static unsigned int hpe1_cmd_smart_get_health(struct ndctl_cmd *cmd) { unsigned char hpe1health; unsigned int health; + int rc; - if (hpe1_smart_valid(cmd) < 0) + rc = hpe1_smart_valid(cmd); + if (rc < 0) { + errno = -rc; return UINT_MAX; + } hpe1health = CMD_HPE1_SMART(cmd)->stat_summary; health = 0; @@ -136,16 +144,26 @@ static unsigned int hpe1_cmd_smart_get_health(struct ndctl_cmd *cmd) static unsigned int hpe1_cmd_smart_get_media_temperature(struct ndctl_cmd *cmd) { - if (hpe1_smart_valid(cmd) < 0) + int rc; + + rc = hpe1_smart_valid(cmd); + if (rc < 0) { + errno = -rc; return UINT_MAX; + } return CMD_HPE1_SMART(cmd)->curr_temp; } static unsigned int hpe1_cmd_smart_get_spares(struct ndctl_cmd *cmd) { - if (hpe1_smart_valid(cmd) < 0) + int rc; + + rc = hpe1_smart_valid(cmd); + if (rc < 0) { + errno = -rc; return UINT_MAX; + } return CMD_HPE1_SMART(cmd)->spare_blocks; } @@ -154,9 +172,13 @@ static unsigned int hpe1_cmd_smart_get_alarm_flags(struct ndctl_cmd *cmd) { unsigned int hpe1flags; unsigned int flags; + int rc; - if (hpe1_smart_valid(cmd) < 0) + rc = hpe1_smart_valid(cmd); + if (rc < 0) { + errno = -rc; return UINT_MAX; + } hpe1flags = CMD_HPE1_SMART(cmd)->alarm_trips; flags = 0; @@ -170,8 +192,13 @@ static unsigned int hpe1_cmd_smart_get_alarm_flags(struct ndctl_cmd *cmd) static unsigned int hpe1_cmd_smart_get_life_used(struct ndctl_cmd *cmd) { - if (hpe1_smart_valid(cmd) < 0) + int rc; + + rc = hpe1_smart_valid(cmd); + if (rc < 0) { + errno = -rc; return UINT_MAX; + } return CMD_HPE1_SMART(cmd)->device_life; } @@ -179,9 +206,13 @@ static unsigned int hpe1_cmd_smart_get_life_used(struct ndctl_cmd *cmd) static unsigned int hpe1_cmd_smart_get_shutdown_state(struct ndctl_cmd *cmd) { unsigned int shutdown; + int rc; - if (hpe1_smart_valid(cmd) < 0) + rc = hpe1_smart_valid(cmd); + if (rc < 0) { + errno = -rc; return UINT_MAX; + } shutdown = CMD_HPE1_SMART(cmd)->last_shutdown_stat; if (shutdown == NDN_HPE1_SMART_LASTSAVEGOOD) @@ -192,16 +223,26 @@ static unsigned int hpe1_cmd_smart_get_shutdown_state(struct ndctl_cmd *cmd) static unsigned int hpe1_cmd_smart_get_vendor_size(struct ndctl_cmd *cmd) { - if (hpe1_smart_valid(cmd) < 0) + int rc; + + rc = hpe1_smart_valid(cmd); + if (rc < 0) { + errno = -rc; return UINT_MAX; + } return CMD_HPE1_SMART(cmd)->vndr_spec_data_size; } static unsigned char *hpe1_cmd_smart_get_vendor_data(struct ndctl_cmd *cmd) { - if (hpe1_smart_valid(cmd) < 0) + int rc; + + rc = hpe1_smart_valid(cmd); + if (rc < 0) { + errno = -rc; return NULL; + } return CMD_HPE1_SMART(cmd)->vnd_spec_data; } @@ -265,9 +306,13 @@ static unsigned int hpe1_cmd_smart_threshold_get_alarm_control(struct ndctl_cmd { unsigned int hpe1flags; unsigned int flags; + int rc; - if (hpe1_smart_threshold_valid(cmd) < 0) + rc = hpe1_smart_threshold_valid(cmd); + if (rc < 0) { + errno = -rc; return UINT_MAX; + } hpe1flags = CMD_HPE1_SMART_THRESH(cmd)->threshold_alarm_ctl; flags = 0; @@ -282,16 +327,26 @@ static unsigned int hpe1_cmd_smart_threshold_get_alarm_control(struct ndctl_cmd static unsigned int hpe1_cmd_smart_threshold_get_media_temperature( struct ndctl_cmd *cmd) { - if (hpe1_smart_threshold_valid(cmd) < 0) + int rc; + + rc = hpe1_smart_threshold_valid(cmd); + if (rc < 0) { + errno = -rc; return UINT_MAX; + } return CMD_HPE1_SMART_THRESH(cmd)->temp_threshold; } static unsigned int hpe1_cmd_smart_threshold_get_spares(struct ndctl_cmd *cmd) { - if (hpe1_smart_threshold_valid(cmd) < 0) + int rc; + + rc = hpe1_smart_threshold_valid(cmd); + if (rc < 0) { + errno = -rc; return UINT_MAX; + } return CMD_HPE1_SMART_THRESH(cmd)->spare_block_threshold; } diff --git a/ndctl/lib/inject.c b/ndctl/lib/inject.c index 268c5cd..2b0702e 100644 --- a/ndctl/lib/inject.c +++ b/ndctl/lib/inject.c @@ -498,6 +498,7 @@ NDCTL_EXPORT unsigned long long ndctl_bb_get_block(struct ndctl_bb *bb) { if (bb) return bb->block; + errno = EINVAL; return ULLONG_MAX; } @@ -505,5 +506,6 @@ NDCTL_EXPORT unsigned long long ndctl_bb_get_count(struct ndctl_bb *bb) { if (bb) return bb->count; + errno = EINVAL; return ULLONG_MAX; } diff --git a/ndctl/lib/intel.c b/ndctl/lib/intel.c index 0abea1e..744386f 100644 --- a/ndctl/lib/intel.c +++ b/ndctl/lib/intel.c @@ -85,8 +85,12 @@ static int intel_smart_valid(struct ndctl_cmd *cmd) #define intel_smart_get_field(cmd, field) \ static unsigned int intel_cmd_smart_get_##field(struct ndctl_cmd *cmd) \ { \ - if (intel_smart_valid(cmd) < 0) \ + int rc; \ + rc = intel_smart_valid(cmd); \ + if (rc < 0) { \ + errno = -rc; \ return UINT_MAX; \ + } \ return cmd->intel->smart.field; \ } @@ -173,8 +177,12 @@ static int intel_smart_threshold_valid(struct ndctl_cmd *cmd) static unsigned int intel_cmd_smart_threshold_get_##field( \ struct ndctl_cmd *cmd) \ { \ - if (intel_smart_threshold_valid(cmd) < 0) \ + int rc; \ + rc = intel_smart_threshold_valid(cmd); \ + if (rc < 0) { \ + errno = -rc; \ return UINT_MAX; \ + } \ return cmd->intel->thresh.field; \ } @@ -431,8 +439,12 @@ static int intel_fw_get_info_valid(struct ndctl_cmd *cmd) static unsigned int intel_cmd_fw_info_get_##field( \ struct ndctl_cmd *cmd) \ { \ - if (intel_fw_get_info_valid(cmd) < 0) \ + int rc; \ + rc = intel_fw_get_info_valid(cmd); \ + if (rc < 0) { \ + errno = -rc; \ return UINT_MAX; \ + } \ return cmd->intel->info.field; \ } @@ -440,8 +452,12 @@ static unsigned int intel_cmd_fw_info_get_##field( \ static unsigned long long intel_cmd_fw_info_get_##field( \ struct ndctl_cmd *cmd) \ { \ - if (intel_fw_get_info_valid(cmd) < 0) \ + int rc; \ + rc = intel_fw_get_info_valid(cmd); \ + if (rc < 0) { \ + errno = -rc; \ return ULLONG_MAX; \ + } \ return cmd->intel->info.field; \ } @@ -454,8 +470,13 @@ intel_fw_info_get_field64(cmd, run_version); static unsigned long long intel_cmd_fw_info_get_updated_version( struct ndctl_cmd *cmd) { - if (intel_fw_get_info_valid(cmd) < 0) + int rc; + + rc = intel_fw_get_info_valid(cmd); + if (rc < 0) { + errno = -rc; return ULLONG_MAX; + } return cmd->intel->info.updated_version; } @@ -488,8 +509,13 @@ static int intel_fw_start_valid(struct ndctl_cmd *cmd) static unsigned int intel_cmd_fw_start_get_context(struct ndctl_cmd *cmd) { - if (intel_fw_start_valid(cmd) < 0) + int rc; + + rc = intel_fw_start_valid(cmd); + if (rc < 0) { + errno = -rc; return UINT_MAX; + } return cmd->intel->start.context; } @@ -580,8 +606,13 @@ static int intel_fw_fquery_valid(struct ndctl_cmd *cmd) static unsigned long long intel_cmd_fw_fquery_get_fw_rev(struct ndctl_cmd *cmd) { - if (intel_fw_fquery_valid(cmd) < 0) + int rc; + + rc = intel_fw_fquery_valid(cmd); + if (rc < 0) { + errno = -rc; return ULLONG_MAX; + } return cmd->intel->fquery.updated_fw_rev; } diff --git a/ndctl/lib/libndctl.c b/ndctl/lib/libndctl.c index 4ceb70e..0c3a35e 100644 --- a/ndctl/lib/libndctl.c +++ b/ndctl/lib/libndctl.c @@ -1112,12 +1112,15 @@ NDCTL_EXPORT unsigned long long ndctl_region_get_resource(struct ndctl_region *r if (snprintf(path, len, "%s/resource", region->region_path) >= len) { err(ctx, "%s: buffer too small!\n", ndctl_region_get_devname(region)); + errno = ENOMEM; return ULLONG_MAX; } rc = sysfs_read_attr(ctx, path, buf); - if (rc < 0) + if (rc < 0) { + errno = -rc; return ULLONG_MAX; + } return strtoull(buf, NULL, 0); } @@ -1256,9 +1259,13 @@ NDCTL_EXPORT unsigned int ndctl_bus_get_scrub_count(struct ndctl_bus *bus) { unsigned int scrub_count = 0; bool active = false; + int rc; - if (__ndctl_bus_get_scrub_state(bus, &scrub_count, &active)) + rc = __ndctl_bus_get_scrub_state(bus, &scrub_count, &active); + if (rc) { + errno = -rc; return UINT_MAX; + } return scrub_count; } @@ -1720,15 +1727,19 @@ NDCTL_EXPORT unsigned int ndctl_dimm_get_health(struct ndctl_dimm *dimm) unsigned int health; struct ndctl_ctx *ctx = ndctl_dimm_get_ctx(dimm); const char *devname = ndctl_dimm_get_devname(dimm); + int rc; cmd = ndctl_dimm_cmd_new_smart(dimm); if (!cmd) { err(ctx, "%s: no smart command support\n", devname); return UINT_MAX; } - if (ndctl_cmd_submit(cmd)) { + rc = ndctl_cmd_submit(cmd); + if (rc) { err(ctx, "%s: smart command failed\n", devname); ndctl_cmd_unref(cmd); + if (rc < 0) + errno = -rc; return UINT_MAX; } @@ -1743,15 +1754,19 @@ NDCTL_EXPORT unsigned int ndctl_dimm_get_flags(struct ndctl_dimm *dimm) unsigned int flags; struct ndctl_ctx *ctx = ndctl_dimm_get_ctx(dimm); const char *devname = ndctl_dimm_get_devname(dimm); + int rc; cmd = ndctl_dimm_cmd_new_smart(dimm); if (!cmd) { dbg(ctx, "%s: no smart command support\n", devname); return UINT_MAX; } - if (ndctl_cmd_submit(cmd)) { + rc = ndctl_cmd_submit(cmd); + if (rc) { dbg(ctx, "%s: smart command failed\n", devname); ndctl_cmd_unref(cmd); + if (rc < 0) + errno = -rc; return UINT_MAX; } @@ -1769,6 +1784,7 @@ NDCTL_EXPORT int ndctl_dimm_is_flag_supported(struct ndctl_dimm *dimm, NDCTL_EXPORT unsigned int ndctl_dimm_get_event_flags(struct ndctl_dimm *dimm) { + int rc; struct ndctl_cmd *cmd = NULL; unsigned int alarm_flags, event_flags = 0; struct ndctl_ctx *ctx = ndctl_dimm_get_ctx(dimm); @@ -1779,9 +1795,12 @@ NDCTL_EXPORT unsigned int ndctl_dimm_get_event_flags(struct ndctl_dimm *dimm) err(ctx, "%s: no smart command support\n", devname); return UINT_MAX; } - if (ndctl_cmd_submit(cmd)) { + rc = ndctl_cmd_submit(cmd); + if (rc) { err(ctx, "%s: smart command failed\n", devname); ndctl_cmd_unref(cmd); + if (rc < 0) + errno = -rc; return UINT_MAX; } @@ -2166,7 +2185,7 @@ NDCTL_EXPORT unsigned long long ndctl_region_get_available_size( unsigned int nstype = ndctl_region_get_nstype(region); struct ndctl_ctx *ctx = ndctl_region_get_ctx(region); char *path = region->region_buf; - int len = region->buf_len; + int rc, len = region->buf_len; char buf[SYSFS_ATTR_SIZE]; switch (nstype) { @@ -2180,11 +2199,15 @@ NDCTL_EXPORT unsigned long long ndctl_region_get_available_size( if (snprintf(path, len, "%s/available_size", region->region_path) >= len) { err(ctx, "%s: buffer too small!\n", ndctl_region_get_devname(region)); + errno = ENOMEM; return ULLONG_MAX; } - if (sysfs_read_attr(ctx, path, buf) < 0) + rc = sysfs_read_attr(ctx, path, buf); + if (rc < 0) { + errno = -rc; return ULLONG_MAX; + } return strtoull(buf, NULL, 0); } @@ -2195,7 +2218,7 @@ NDCTL_EXPORT unsigned long long ndctl_region_get_max_available_extent( unsigned int nstype = ndctl_region_get_nstype(region); struct ndctl_ctx *ctx = ndctl_region_get_ctx(region); char *path = region->region_buf; - int len = region->buf_len; + int rc, len = region->buf_len; char buf[SYSFS_ATTR_SIZE]; switch (nstype) { @@ -2210,12 +2233,15 @@ NDCTL_EXPORT unsigned long long ndctl_region_get_max_available_extent( "%s/max_available_extent", region->region_path) >= len) { err(ctx, "%s: buffer too small!\n", ndctl_region_get_devname(region)); + errno = ENOMEM; return ULLONG_MAX; } /* fall back to legacy behavior if max extents is not exported */ - if (sysfs_read_attr(ctx, path, buf) < 0) { + rc = sysfs_read_attr(ctx, path, buf); + if (rc < 0) { dbg(ctx, "max extents attribute not exported on older kernels\n"); + errno = -rc; return ULLONG_MAX; } @@ -4017,9 +4043,10 @@ NDCTL_EXPORT unsigned int ndctl_namespace_get_supported_sector_size( if (ndns->lbasize.num == 0) return 0; - if (i < 0 || i > ndns->lbasize.num) + if (i < 0 || i > ndns->lbasize.num) { + errno = EINVAL; return UINT_MAX; - else + } else return ndns->lbasize.supported[i]; } @@ -4428,9 +4455,10 @@ NDCTL_EXPORT unsigned int ndctl_btt_get_id(struct ndctl_btt *btt) NDCTL_EXPORT unsigned int ndctl_btt_get_supported_sector_size( struct ndctl_btt *btt, int i) { - if (i < 0 || i > btt->lbasize.num) + if (i < 0 || i > btt->lbasize.num) { + errno = EINVAL; return UINT_MAX; - else + } else return btt->lbasize.supported[i]; } diff --git a/ndctl/lib/msft.c b/ndctl/lib/msft.c index e15bc07..19453cd 100644 --- a/ndctl/lib/msft.c +++ b/ndctl/lib/msft.c @@ -77,8 +77,13 @@ static int msft_smart_valid(struct ndctl_cmd *cmd) static unsigned int msft_cmd_smart_get_flags(struct ndctl_cmd *cmd) { - if (msft_smart_valid(cmd) < 0) + int rc; + + rc = msft_smart_valid(cmd); + if (rc < 0) { + errno = -rc; return UINT_MAX; + } /* below health data can be retrieved via MSFT _DSM function 11 */ return NDN_MSFT_SMART_HEALTH_VALID | @@ -103,9 +108,13 @@ static unsigned int msft_cmd_smart_get_health(struct ndctl_cmd *cmd) { unsigned int health; unsigned int num; + int rc; - if (msft_smart_valid(cmd) < 0) + rc = msft_smart_valid(cmd); + if (rc < 0) { + errno = -rc; return UINT_MAX; + } num = num_set_bit_health(CMD_MSFT_SMART(cmd)->health); if (num == 0) @@ -122,16 +131,26 @@ static unsigned int msft_cmd_smart_get_health(struct ndctl_cmd *cmd) static unsigned int msft_cmd_smart_get_media_temperature(struct ndctl_cmd *cmd) { - if (msft_smart_valid(cmd) < 0) + int rc; + + rc = msft_smart_valid(cmd); + if (rc < 0) { + errno = -rc; return UINT_MAX; + } return CMD_MSFT_SMART(cmd)->temp * 16; } static unsigned int msft_cmd_smart_get_life_used(struct ndctl_cmd *cmd) { - if (msft_smart_valid(cmd) < 0) + int rc; + + rc = msft_smart_valid(cmd); + if (rc < 0) { + errno = -rc; return UINT_MAX; + } return 100 - CMD_MSFT_SMART(cmd)->nvm_lifetime; } -- 2.17.1 _______________________________________________ Linux-nvdimm mailing list [email protected] https://lists.01.org/mailman/listinfo/linux-nvdimm
