diff options
Diffstat (limited to 'libopeniscsiusr/misc.c')
| -rw-r--r-- | libopeniscsiusr/misc.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/libopeniscsiusr/misc.c b/libopeniscsiusr/misc.c index 93db919..9111966 100644 --- a/libopeniscsiusr/misc.c +++ b/libopeniscsiusr/misc.c @@ -24,6 +24,12 @@ #include <dirent.h> #include <string.h> #include <unistd.h> +#include <net/if.h> +#include <sys/socket.h> +#include <linux/ethtool.h> +#include <sys/ioctl.h> +#include <linux/sockios.h> +#include <net/if_arp.h> #include "libopeniscsiusr/libopeniscsiusr.h" #include "misc.h" @@ -63,6 +69,10 @@ static const struct _num_str_conv _ISCSI_RC_MSG_CONV[] = { {LIBISCSI_ERR_ACCESS, "Permission deny"}, {LIBISCSI_ERR_NOMEM, "Out of memory"}, {LIBISCSI_ERR_SYSFS_LOOKUP, "Could not lookup object in sysfs"}, + {LIBISCSI_ERR_IDBM, "Error accessing/managing iSCSI DB"}, + {LIBISCSI_ERR_TRANS_NOT_FOUND, + "iSCSI transport module not loaded in kernel or iscsid"}, + {LIBISCSI_ERR_INVAL, "Invalid argument"}, }; _iscsi_str_func_gen(iscsi_strerror, int, rc, _ISCSI_RC_MSG_CONV); @@ -122,3 +132,200 @@ bool _file_exists(const char *path) else return false; } + +static bool _is_eth(struct iscsi_context *ctx, const char *if_name) +{ + struct ifreq ifr; + int sockfd = -1; + char strerr_buff[_STRERR_BUFF_LEN]; + + assert(if_name != NULL); + + memset(&ifr, 0, sizeof(ifr)); + + _strncpy(ifr.ifr_name, if_name, IFNAMSIZ); + + sockfd = socket(AF_INET, SOCK_DGRAM, 0); + if (sockfd < 0) { + _warn(ctx, "Failed to create SOCK_DGRAM AF_INET socket: %d %s", + errno, _strerror(errno, strerr_buff)); + return false; + } + + if (ioctl(sockfd, SIOCGIFHWADDR, &ifr) != 0) { + _warn(ctx, "IOCTL SIOCGIFHWADDR to %s failed: %d %s", if_name, + errno, _strerror(errno, strerr_buff)); + close(sockfd); + return false; + } + + close(sockfd); + + if (ifr.ifr_hwaddr.sa_family == ARPHRD_ETHER) + return true; + + return false; +} + +/* + * driver_name should be char[_ETH_DRIVER_NAME_MAX_LEN] + */ +static int _eth_driver_get(struct iscsi_context *ctx, const char *if_name, + char *driver_name) +{ + int sockfd = -1; + struct ethtool_drvinfo drvinfo; + struct ifreq ifr; + char strerr_buff[_STRERR_BUFF_LEN]; + + assert(ctx != NULL); + assert(if_name != NULL); + assert(driver_name != NULL); + + memset(&ifr, 0, sizeof(ifr)); + memset(&drvinfo, 0, sizeof(drvinfo)); + + _strncpy(ifr.ifr_name, if_name, IFNAMSIZ); + drvinfo.cmd = ETHTOOL_GDRVINFO; + ifr.ifr_data = (caddr_t) &drvinfo; + + sockfd = socket(AF_INET, SOCK_DGRAM, 0); + if (sockfd < 0) { + _error(ctx, "Failed to create SOCK_DGRAM AF_INET socket: %d %s", + errno, _strerror(errno, strerr_buff)); + return LIBISCSI_ERR_BUG; + } + + if (ioctl(sockfd, SIOCETHTOOL, &ifr) != 0) { + _warn(ctx, "IOCTL SIOCETHTOOL to %s failed: %d %s", if_name, + errno, _strerror(errno, strerr_buff)); + close(sockfd); + return LIBISCSI_ERR_BUG; + } + close(sockfd); + snprintf(driver_name, _ETH_DRIVER_NAME_MAX_LEN, "%s", drvinfo.driver); + + return LIBISCSI_OK; +} + +int _eth_ifs_get(struct iscsi_context *ctx, struct _eth_if ***eifs, + uint32_t *eif_count) +{ + int rc = LIBISCSI_OK; + struct if_nameindex *if_ni = NULL; + struct if_nameindex *if_i = NULL; + struct _eth_if *eif = NULL; + uint32_t tmp_count = 0; + + assert(ctx != NULL); + assert(eifs != NULL); + assert(eif_count != NULL); + + *eifs = NULL; + *eif_count = 0; + + if_ni = if_nameindex(); + _alloc_null_check(ctx, if_ni, rc, out); + + for (if_i = if_ni; if_i && if_i->if_index && if_i->if_name; ++if_i) + tmp_count++; + + if (tmp_count == 0) + goto out; + + *eifs = calloc(tmp_count, sizeof(struct _eth_if *)); + _alloc_null_check(ctx, *eifs, rc, out); + + for (if_i = if_ni; if_i && if_i->if_index && if_i->if_name; ++if_i) { + if (! _is_eth(ctx, if_i->if_name)) + continue; + eif = calloc(1, sizeof(struct _eth_if)); + _alloc_null_check(ctx, eif, rc, out); + (*eifs)[(*eif_count)++] = eif; + snprintf(eif->if_name, sizeof(eif->if_name)/sizeof(char), + "%s", if_i->if_name); + _good(_eth_driver_get(ctx, eif->if_name, eif->driver_name), + rc, out); + } + +out: + if (rc != LIBISCSI_OK) { + _eth_ifs_free(*eifs, *eif_count); + *eifs = NULL; + *eif_count = 0; + } + if (if_ni != NULL) + if_freenameindex(if_ni); + return rc; +} + +void _eth_ifs_free(struct _eth_if **eifs, uint32_t eif_count) +{ + uint32_t i = 0; + + if ((eif_count == 0) || (eifs == NULL)) + return; + + for (; i < eif_count; ++i) + free(eifs[i]); + free(eifs); +} + +void _scandir_free(struct dirent **namelist, int count) +{ + int i = 0; + + if ((namelist == NULL) || (count == 0)) + return; + + for (i = count - 1; i >= 0; --i) + free(namelist[i]); + free(namelist); +} + +int _scandir(struct iscsi_context *ctx, const char *dir_path, + struct dirent ***namelist, int *count) +{ + int rc = LIBISCSI_OK; + int errno_save = 0; + + assert(ctx != NULL); + assert(dir_path != NULL); + assert(namelist != NULL); + assert(count != NULL); + + *namelist = NULL; + *count = 0; + + *count = scandir(dir_path, namelist, _scan_filter_skip_dot, alphasort); + if (*count < 0) { + errno_save = errno; + if (errno_save == ENOENT) { + *count = 0; + goto out; + } + if (errno_save == ENOMEM) { + rc = LIBISCSI_ERR_NOMEM; + goto out; + } + if (errno_save == ENOTDIR) { + rc = LIBISCSI_ERR_BUG; + _error(ctx, "Got ENOTDIR error when scandir %s", + dir_path); + goto out; + } + rc = LIBISCSI_ERR_BUG; + _error(ctx, "Got unexpected error %d when scandir %s", + errno_save, dir_path); + goto out; + } + +out: + if (rc != LIBISCSI_OK) { + _scandir_free(*namelist, *count); + *namelist = NULL; + *count = 0; + } + + return rc; +} |