/* Copyright (c) 2008-2012 Red Hat, Inc. This file is part of GlusterFS. This file is licensed to you under your choice of the GNU Lesser General Public License, version 3 or any later version (LGPLv3 or later), or the GNU General Public License, version 2 (GPLv2), in all cases as published by the Free Software Foundation. */ #ifndef _COMMON_UTILS_H #define _COMMON_UTILS_H #include #include #include #include #include #include #include #include #ifndef GF_BSD_HOST_OS #include #endif #include #include #ifndef ffsll #define ffsll(x) __builtin_ffsll(x) #endif void trap (void); #define GF_UNIVERSAL_ANSWER 42 /* :O */ /* To solve type punned error */ #define VOID(ptr) ((void **) ((void *) ptr)) #include "logging.h" #include "glusterfs.h" #include "locking.h" #include "mem-pool.h" #include "compat-uuid.h" #include "iatt.h" #include "uuid.h" #include "libglusterfs-messages.h" #define STRINGIFY(val) #val #define TOSTRING(val) STRINGIFY(val) #define alloca0(size) ({void *__ptr; __ptr = alloca(size); memset(__ptr, 0, size); __ptr; }) #define min(a,b) ((a)<(b)?(a):(b)) #define max(a,b) ((a)>(b)?(a):(b)) #define roof(a,b) ((((a)+(b)-1)/((b)?(b):1))*(b)) #define floor(a,b) (((a)/((b)?(b):1))*(b)) #define IPv4_ADDR_SIZE 32 #define GF_UNIT_KB 1024ULL #define GF_UNIT_MB 1048576ULL #define GF_UNIT_GB 1073741824ULL #define GF_UNIT_TB 1099511627776ULL #define GF_UNIT_PB 1125899906842624ULL #define GF_UNIT_B_STRING "B" #define GF_UNIT_KB_STRING "KB" #define GF_UNIT_MB_STRING "MB" #define GF_UNIT_GB_STRING "GB" #define GF_UNIT_TB_STRING "TB" #define GF_UNIT_PB_STRING "PB" #define GF_UNIT_PERCENT_STRING "%" #define GEOREP "geo-replication" #define GHADOOP "glusterfs-hadoop" #define GLUSTERD_NAME "glusterd" #define GF_SELINUX_XATTR_KEY "security.selinux" #define WIPE(statp) do { typeof(*statp) z = {0,}; if (statp) *statp = z; } while (0) #define IS_EXT_FS(fs_name) \ (!strcmp (fs_name, "ext2") || \ !strcmp (fs_name, "ext3") || \ !strcmp (fs_name, "ext4")) /* process mode definitions */ #define GF_SERVER_PROCESS 0 #define GF_CLIENT_PROCESS 1 #define GF_GLUSTERD_PROCESS 2 /* Defining this here as it is needed by glusterd for setting * nfs port in volume status. */ #define GF_NFS3_PORT 2049 #define GF_CLIENT_PORT_CEILING 1024 #define GF_IANA_PRIV_PORTS_START 49152 /* RFC 6335 */ #define GF_CLNT_INSECURE_PORT_CEILING (GF_IANA_PRIV_PORTS_START - 1) #define GF_PORT_MAX 65535 #define GF_MINUTE_IN_SECONDS 60 #define GF_HOUR_IN_SECONDS (60*60) #define GF_DAY_IN_SECONDS (24*60*60) #define GF_WEEK_IN_SECONDS (7*24*60*60) /* Default timeout for both barrier and changelog translator */ #define BARRIER_TIMEOUT "120" /* Default value of signing waiting time to sign a file for bitrot */ #define SIGNING_TIMEOUT "120" /* Shard */ #define GF_XATTR_SHARD_FILE_SIZE "trusted.glusterfs.shard.file-size" #define SHARD_ROOT_GFID "be318638-e8a0-4c6d-977d-7a937aa84806" /* Lease: buffer length for stringified lease id * Format: 4hexnum-4hexnum-4hexnum-4hexnum-4hexnum-4hexnum-4hexnum-4hexnum * Eg:6c69-6431-2d63-6c6e-7431-0000-0000-0000 */ #define GF_LEASE_ID_BUF_SIZE ((LEASE_ID_SIZE * 2) + \ (LEASE_ID_SIZE / 2)) enum _gf_boolean { _gf_false = 0, _gf_true = 1 }; /* * we could have initialized these as +ve values and treated * them as negative while comparing etc.. (which would have * saved us with the pain of assigning values), but since we * only have a few clients that use this feature, it's okay. */ enum _gf_special_pid { GF_CLIENT_PID_MAX = 0, GF_CLIENT_PID_GSYNCD = -1, GF_CLIENT_PID_HADOOP = -2, GF_CLIENT_PID_DEFRAG = -3, GF_CLIENT_PID_NO_ROOT_SQUASH = -4, GF_CLIENT_PID_QUOTA_MOUNT = -5, GF_CLIENT_PID_SELF_HEALD = -6, GF_CLIENT_PID_GLFS_HEAL = -7, GF_CLIENT_PID_BITD = -8, GF_CLIENT_PID_SCRUB = -9, GF_CLIENT_PID_TIER_DEFRAG = -10, GF_SERVER_PID_TRASH = -11 }; enum _gf_xlator_ipc_targets { GF_IPC_TARGET_CHANGELOG = 0, GF_IPC_TARGET_CTR = 1, GF_IPC_TARGET_UPCALL = 2 }; typedef enum _gf_boolean gf_boolean_t; typedef enum _gf_special_pid gf_special_pid_t; typedef enum _gf_xlator_ipc_targets _gf_xlator_ipc_targets_t; /* The DHT file rename operation is not a straightforward rename. * It involves creating linkto and linkfiles, and can unlink or rename the * source file depending on the hashed and cached subvols for the source * and target files. this makes it difficult for geo-rep to figure out that * a rename operation has taken place. * * We now send a special key and the values of the source and target pargfids * and basenames to indicate to changelog that the operation in question * should be treated as a rename. We are explicitly filling and sending this * as a binary value in the dictionary as the unlink op will not have the * source file information. The lengths of the src and target basenames * are used to calculate where to start reading the names in the structure. * XFS allows a max of 255 chars for filenames but other file systems might * not have such restrictions */ typedef struct dht_changelog_rename_info { uuid_t old_pargfid; uuid_t new_pargfid; int32_t oldname_len; int32_t newname_len; char buffer[1]; } dht_changelog_rename_info_t; typedef int (*gf_cmp) (void *, void *); struct _dict; struct dnscache { struct _dict *cache_dict; time_t ttl; }; struct dnscache_entry { char *ip; char *fqdn; time_t timestamp; }; struct dnscache6 { struct addrinfo *first; struct addrinfo *next; }; struct list_node { void *ptr; struct list_head list; }; extern char *vol_type_str[]; struct list_node *list_node_add (void *ptr, struct list_head *list); struct list_node *list_node_add_order (void *ptr, struct list_head *list, int (*compare)(struct list_head *, struct list_head *)); void list_node_del (struct list_node *node); struct dnscache *gf_dnscache_init (time_t ttl); struct dnscache_entry *gf_dnscache_entry_init (void); void gf_dnscache_entry_deinit (struct dnscache_entry *entry); char *gf_rev_dns_lookup_cached (const char *ip, struct dnscache *dnscache); char *gf_resolve_path_parent (const char *path); void gf_global_variable_init(void); int32_t gf_resolve_ip6 (const char *hostname, uint16_t port, int family, void **dnscache, struct addrinfo **addr_info); void gf_log_dump_graph (FILE *specfp, glusterfs_graph_t *graph); void gf_print_trace (int32_t signal, glusterfs_ctx_t *ctx); int gf_set_log_file_path (cmd_args_t *cmd_args, glusterfs_ctx_t *ctx); int gf_set_log_ident (cmd_args_t *cmd_args); #define VECTORSIZE(count) (count * (sizeof (struct iovec))) #define STRLEN_0(str) (strlen(str) + 1) #define VALIDATE_OR_GOTO(arg,label) do { \ if (!arg) { \ errno = EINVAL; \ gf_msg_callingfn ((this ? (this->name) : \ "(Govinda! Govinda!)"), \ GF_LOG_WARNING, EINVAL, \ LG_MSG_INVALID_ARG, \ "invalid argument: " #arg); \ goto label; \ } \ } while (0) #define GF_VALIDATE_OR_GOTO(name,arg,label) do { \ if (!arg) { \ errno = EINVAL; \ gf_msg_callingfn (name, GF_LOG_ERROR, errno, \ LG_MSG_INVALID_ARG, \ "invalid argument: " #arg); \ goto label; \ } \ } while (0) #define GF_VALIDATE_OR_GOTO_WITH_ERROR(name, arg, label, errno, error) do { \ if (!arg) { \ errno = error; \ gf_msg_callingfn (name, GF_LOG_ERROR, EINVAL, \ LG_MSG_INVALID_ARG, \ "invalid argument: " #arg); \ goto label; \ } \ }while (0) #define GF_CHECK_ALLOC(arg, retval, label) do { \ if (!(arg)) { \ retval = -ENOMEM; \ goto label; \ } \ } while (0) \ #define GF_CHECK_ALLOC_AND_LOG(name, item, retval, msg, errlabel) do { \ if (!(item)) { \ (retval) = -ENOMEM; \ gf_msg (name, GF_LOG_CRITICAL, ENOMEM, \ LG_MSG_NO_MEMORY, (msg)); \ goto errlabel; \ } \ } while (0) #define GF_ASSERT_AND_GOTO_WITH_ERROR(name, arg, label, errno, error) do { \ if (!arg) { \ GF_ASSERT (0); \ errno = error; \ goto label; \ } \ }while (0) #define GF_VALIDATE_ABSOLUTE_PATH_OR_GOTO(name,arg,label) \ do { \ GF_VALIDATE_OR_GOTO (name, arg, label); \ if ((arg[0]) != '/') { \ errno = EINVAL; \ gf_msg_callingfn (name, GF_LOG_ERROR, EINVAL, \ LG_MSG_INVALID_ARG, \ "invalid argument: " #arg); \ goto label; \ } \ } while (0) #define GF_REMOVE_SLASH_FROM_PATH(path, string) \ do { \ int i = 0; \ for (i = 1; i < strlen (path); i++) { \ string[i-1] = path[i]; \ if (string[i-1] == '/') \ string[i-1] = '-'; \ } \ } while (0) #define GF_REMOVE_INTERNAL_XATTR(pattern, dict) \ do { \ if (!dict) { \ gf_msg (this->name, GF_LOG_ERROR, 0, \ LG_MSG_DICT_NULL, "dict is null"); \ break; \ } \ dict_foreach_fnmatch (dict, pattern, \ dict_remove_foreach_fn, \ NULL); \ } while (0) #define GF_IF_INTERNAL_XATTR_GOTO(pattern, dict, op_errno, label) \ do { \ if (!dict) { \ gf_msg (this->name, GF_LOG_ERROR, 0, \ LG_MSG_DICT_NULL, \ "setxattr dict is null"); \ goto label; \ } \ if (dict_foreach_fnmatch (dict, pattern, \ dict_null_foreach_fn, \ NULL) > 0) { \ op_errno = EPERM; \ gf_msg (this->name, GF_LOG_ERROR, op_errno, \ LG_MSG_NO_PERM, \ "attempt to set internal" \ " xattr: %s", pattern); \ goto label; \ } \ } while (0) #define GF_IF_NATIVE_XATTR_GOTO(pattern, key, op_errno, label) \ do { \ if (!key) { \ gf_msg (this->name, GF_LOG_ERROR, 0, \ LG_MSG_NO_KEY, \ "no key for removexattr"); \ goto label; \ } \ if (!fnmatch (pattern, key, 0)) { \ op_errno = EPERM; \ gf_msg (this->name, GF_LOG_ERROR, op_errno, \ LG_MSG_NO_PERM, \ "attempt to remove internal " \ "xattr: %s", key); \ goto label; \ } \ } while (0) #define GF_FILE_CONTENT_REQUESTED(_xattr_req,_content_limit) \ (dict_get_uint64 (_xattr_req, "glusterfs.content", _content_limit) == 0) #ifdef DEBUG #define GF_ASSERT(x) assert (x); #else #define GF_ASSERT(x) \ do { \ if (!(x)) { \ gf_msg_callingfn ("", GF_LOG_ERROR, 0, \ LG_MSG_ASSERTION_FAILED, \ "Assertion failed: " #x); \ } \ } while (0) #endif #define GF_UUID_ASSERT(u) \ if (gf_uuid_is_null (u))\ GF_ASSERT (!"uuid null"); #define GF_IGNORE_IF_GSYNCD_SAFE_ERROR(frame, op_errno) \ (((frame->root->pid == GF_CLIENT_PID_GSYNCD) && \ (op_errno == EEXIST || op_errno == ENOENT))?0:1) \ union gf_sock_union { struct sockaddr_storage storage; struct sockaddr_in6 sin6; struct sockaddr_in sin; struct sockaddr sa; }; #define GF_HIDDEN_PATH ".glusterfs" #define GF_UNLINK_PATH GF_HIDDEN_PATH"/unlink" #define GF_LANDFILL_PATH GF_HIDDEN_PATH"/landfill" #define IOV_MIN(n) min(IOV_MAX,n) #define GF_FOR_EACH_ENTRY_IN_DIR(entry, dir, scr) \ do {\ entry = NULL;\ if (dir) { \ entry = sys_readdir (dir, scr); \ while (entry && (!strcmp (entry->d_name, ".") || \ !fnmatch ("*.tmp", entry->d_name, 0) || \ !strcmp (entry->d_name, ".."))) { \ entry = sys_readdir (dir, scr); \ } \ } \ } while (0) static inline void iov_free (struct iovec *vector, int count) { int i; for (i = 0; i < count; i++) FREE (vector[i].iov_base); GF_FREE (vector); } static inline int iov_length (const struct iovec *vector, int count) { int i = 0; size_t size = 0; for (i = 0; i < count; i++) size += vector[i].iov_len; return size; } static inline struct iovec * iov_dup (const struct iovec *vector, int count) { int bytecount = 0; int i; struct iovec *newvec = NULL; bytecount = (count * sizeof (struct iovec)); newvec = GF_MALLOC (bytecount, gf_common_mt_iovec); if (!newvec) return NULL; for (i = 0; i < count; i++) { newvec[i].iov_len = vector[i].iov_len; newvec[i].iov_base = vector[i].iov_base; } return newvec; } static inline int iov_subset (struct iovec *orig, int orig_count, off_t src_offset, off_t dst_offset, struct iovec *new) { int new_count = 0; int i; off_t offset = 0; size_t start_offset = 0; size_t end_offset = 0, origin_iov_len = 0; for (i = 0; i < orig_count; i++) { origin_iov_len = orig[i].iov_len; if ((offset + orig[i].iov_len < src_offset) || (offset > dst_offset)) { goto not_subset; } if (!new) { goto count_only; } start_offset = 0; end_offset = orig[i].iov_len; if (src_offset >= offset) { start_offset = (src_offset - offset); } if (dst_offset <= (offset + orig[i].iov_len)) { end_offset = (dst_offset - offset); } new[new_count].iov_base = orig[i].iov_base + start_offset; new[new_count].iov_len = end_offset - start_offset; count_only: new_count++; not_subset: offset += origin_iov_len; } return new_count; } static inline void iov_unload (char *buf, const struct iovec *vector, int count) { int i; int copied = 0; for (i = 0; i < count; i++) { memcpy (buf + copied, vector[i].iov_base, vector[i].iov_len); copied += vector[i].iov_len; } } static inline size_t iov_load (const struct iovec *vector, int count, char *buf, int size) { size_t left = size; size_t cp = 0; int ret = 0; int i = 0; while (left && i < count) { cp = min (vector[i].iov_len, left); if (vector[i].iov_base != buf + (size - left)) memcpy (vector[i].iov_base, buf + (size - left), cp); ret += cp; left -= cp; if (left) i++; } return ret; } static inline size_t iov_copy (const struct iovec *dst, int dcnt, const struct iovec *src, int scnt) { size_t ret = 0; size_t left = 0; size_t min_i = 0; int s_i = 0, s_ii = 0; int d_i = 0, d_ii = 0; ret = min (iov_length (dst, dcnt), iov_length (src, scnt)); left = ret; while (left) { min_i = min (dst[d_i].iov_len - d_ii, src[s_i].iov_len - s_ii); memcpy (dst[d_i].iov_base + d_ii, src[s_i].iov_base + s_ii, min_i); d_ii += min_i; if (d_ii == dst[d_i].iov_len) { d_ii = 0; d_i++; } s_ii += min_i; if (s_ii == src[s_i].iov_len) { s_ii = 0; s_i++; } left -= min_i; } return ret; } static inline int mem_0filled (const char *buf, size_t size) { int i = 0; int ret = 0; for (i = 0; i < size; i++) { ret = buf[i]; if (ret) break; } return ret; } static inline int iov_0filled (struct iovec *vector, int count) { int i = 0; int ret = 0; for (i = 0; i < count; i++) { ret = mem_0filled (vector[i].iov_base, vector[i].iov_len); if (ret) break; } return ret; } static inline void * memdup (const void *ptr, size_t size) { void *newptr = NULL; newptr = GF_MALLOC (size, gf_common_mt_memdup); if (!newptr) return NULL; memcpy (newptr, ptr, size); return newptr; } typedef enum { gf_timefmt_default = 0, gf_timefmt_FT = 0, /* YYYY-MM-DD hh:mm:ss */ gf_timefmt_Ymd_T, /* YYYY/MM-DD-hh:mm:ss */ gf_timefmt_bdT, /* MMM DD hh:mm:ss */ gf_timefmt_F_HMS, /* YYYY-MM-DD hhmmss */ gf_timefmt_dirent, gf_timefmt_s, gf_timefmt_last } gf_timefmts; static inline char * gf_time_fmt (char *dst, size_t sz_dst, time_t utime, unsigned int fmt) { extern void _gf_timestuff (gf_timefmts *, const char ***, const char ***); static gf_timefmts timefmt_last = (gf_timefmts) - 1; static const char **fmts; static const char **zeros; struct tm tm; if (timefmt_last == (gf_timefmts) - 1) _gf_timestuff (&timefmt_last, &fmts, &zeros); if (timefmt_last < fmt) fmt = gf_timefmt_default; if (utime && gmtime_r (&utime, &tm) != NULL) { strftime (dst, sz_dst, fmts[fmt], &tm); } else { strncpy (dst, "N/A", sz_dst); } return dst; } /* This function helps us use gfid (unique identity) to generate inode's unique * number in glusterfs. */ ino_t gfid_to_ino (uuid_t gfid); int mkdir_p (char *path, mode_t mode, gf_boolean_t allow_symlinks); /* * rounds up nr to power of two. If nr is already a power of two, just returns * nr */ int gf_lstat_dir (const char *path, struct stat *stbuf_in); int32_t gf_roundup_power_of_two (int32_t nr); /* * rounds up nr to next power of two. If nr is already a power of two, next * power of two is returned. */ int32_t gf_roundup_next_power_of_two (int32_t nr); char *gf_trim (char *string); int gf_strsplit (const char *str, const char *delim, char ***tokens, int *token_count); int gf_volume_name_validate (const char *volume_name); int gf_string2long (const char *str, long *n); int gf_string2ulong (const char *str, unsigned long *n); int gf_string2int (const char *str, int *n); int gf_string2uint (const char *str, unsigned int *n); int gf_string2double (const char *str, double *n); int gf_string2longlong (const char *str, long long *n); int gf_string2ulonglong (const char *str, unsigned long long *n); int gf_string2int8 (const char *str, int8_t *n); int gf_string2int16 (const char *str, int16_t *n); int gf_string2int32 (const char *str, int32_t *n); int gf_string2int64 (const char *str, int64_t *n); int gf_string2uint8 (const char *str, uint8_t *n); int gf_string2uint16 (const char *str, uint16_t *n); int gf_string2uint32 (const char *str, uint32_t *n); int gf_string2uint64 (const char *str, uint64_t *n); int gf_strstr (const char *str, const char *delim, const char *match); int gf_string2ulong_base10 (const char *str, unsigned long *n); int gf_string2uint_base10 (const char *str, unsigned int *n); int gf_string2uint8_base10 (const char *str, uint8_t *n); int gf_string2uint16_base10 (const char *str, uint16_t *n); int gf_string2uint32_base10 (const char *str, uint32_t *n); int gf_string2uint64_base10 (const char *str, uint64_t *n); int gf_string2bytesize (const char *str, uint64_t *n); int gf_string2bytesize_size (const char *str, size_t *n); int gf_string2bytesize_uint64 (const char *str, uint64_t *n); int gf_string2bytesize_int64 (const char *str, int64_t *n); int gf_string2percent_or_bytesize (const char *str, double *n, gf_boolean_t *is_percent); int gf_string2boolean (const char *str, gf_boolean_t *b); int gf_string2percent (const char *str, double *n); int gf_string2time (const char *str, uint32_t *n); int gf_lockfd (int fd); int gf_unlockfd (int fd); int get_checksum_for_file (int fd, uint32_t *checksum); int log_base2 (unsigned long x); int get_checksum_for_path (char *path, uint32_t *checksum); int get_file_mtime (const char *path, time_t *stamp); char *gf_resolve_path_parent (const char *path); char *strtail (char *str, const char *pattern); void skipwhite (char **s); char *nwstrtail (char *str, char *pattern); void skip_word (char **str); /* returns a new string with nth word of given string. n>=1 */ char *get_nth_word (const char *str, int n); gf_boolean_t mask_match (const uint32_t a, const uint32_t b, const uint32_t m); gf_boolean_t gf_is_ip_in_net (const char *network, const char *ip_str); char valid_host_name (char *address, int length); char valid_ipv4_address (char *address, int length, gf_boolean_t wildcard_acc); char valid_ipv6_address (char *address, int length, gf_boolean_t wildcard_acc); char valid_internet_address (char *address, gf_boolean_t wildcard_acc); gf_boolean_t valid_mount_auth_address (char *address); gf_boolean_t valid_ipv4_subnetwork (const char *address); gf_boolean_t gf_sock_union_equal_addr (union gf_sock_union *a, union gf_sock_union *b); char *gf_rev_dns_lookup (const char *ip); char *uuid_utoa (uuid_t uuid); char *uuid_utoa_r (uuid_t uuid, char *dst); char *lkowner_utoa (gf_lkowner_t *lkowner); char *lkowner_utoa_r (gf_lkowner_t *lkowner, char *dst, int len); char *leaseid_utoa (const char *lease_id); gf_boolean_t is_valid_lease_id (const char *lease_id); void gf_array_insertionsort (void *a, int l, int r, size_t elem_size, gf_cmp cmp); int gf_is_str_int (const char *value); char *gf_uint64_2human_readable (uint64_t); int get_vol_type (int type, int dist_count, int brick_count); int validate_brick_name (char *brick); char *get_host_name (char *word, char **host); char *get_path_name (char *word, char **path); void gf_path_strip_trailing_slashes (char *path); uint64_t get_mem_size (void); int gf_strip_whitespace (char *str, int len); int gf_canonicalize_path (char *path); char *generate_glusterfs_ctx_id (void); char *gf_get_reserved_ports(void); int gf_process_reserved_ports (gf_boolean_t ports[], uint32_t ceiling); gf_boolean_t gf_ports_reserved (char *blocked_port, gf_boolean_t *ports, uint32_t ceiling); int gf_get_hostname_from_ip (char *client_ip, char **hostname); gf_boolean_t gf_is_local_addr (char *hostname); gf_boolean_t gf_is_same_address (char *host1, char *host2); void md5_wrapper(const unsigned char *data, size_t len, char *md5); int gf_set_timestamp (const char *src, const char* dest); int gf_thread_create (pthread_t *thread, const pthread_attr_t *attr, void *(*start_routine)(void *), void *arg); int gf_thread_create_detached (pthread_t *thread, void *(*start_routine)(void *), void *arg); gf_boolean_t gf_is_service_running (char *pidfile, int *pid); int gf_skip_header_section (int fd, int header_len); struct iatt; struct _dict; gf_boolean_t dht_is_linkfile (struct iatt *buf, struct _dict *dict); int gf_check_log_format (const char *value); int gf_check_logger (const char *value); gf_boolean_t gf_compare_sockaddr (const struct sockaddr *addr1, const struct sockaddr *addr2); char * gf_backtrace_save (char *buf); void gf_backtrace_done (char *buf); gf_loglevel_t fop_log_level (glusterfs_fop_t fop, int op_errno); int32_t gf_build_absolute_path (char *current_path, char *relative_path, char **path); int recursive_rmdir (const char *delete_path); int gf_get_index_by_elem (char **array, char *elem); int glusterfs_is_local_pathinfo (char *pathinfo, gf_boolean_t *local); int gf_thread_cleanup_xint (pthread_t thread); ssize_t gf_nread (int fd, void *buf, size_t count); ssize_t gf_nwrite (int fd, const void *buf, size_t count); void _mask_cancellation (void); void _unmask_cancellation (void); gf_boolean_t gf_is_zero_filled_stat (struct iatt *buf); void gf_zero_fill_stat (struct iatt *buf); gf_boolean_t gf_is_valid_xattr_namespace (char *k); const char * gf_inode_type_to_str (ia_type_t type); int32_t gf_bits_count (uint64_t n); int32_t gf_bits_index (uint64_t n); #endif /* _COMMON_UTILS_H */