diff options
Diffstat (limited to 'xlators/cluster/ec/src/ec-helpers.h')
| -rw-r--r-- | xlators/cluster/ec/src/ec-helpers.h | 234 |
1 files changed, 126 insertions, 108 deletions
diff --git a/xlators/cluster/ec/src/ec-helpers.h b/xlators/cluster/ec/src/ec-helpers.h index b548f802361..015db514e05 100644 --- a/xlators/cluster/ec/src/ec-helpers.h +++ b/xlators/cluster/ec/src/ec-helpers.h @@ -17,60 +17,77 @@ #define EC_IS_ERR(_x) (((uintptr_t)(_x) & ~0xfffULL) == ~0xfffULL) #define EC_GET_ERR(_x) ((int32_t)(intptr_t)(_x)) -#define EC_ALIGN_CHECK(_ptr, _align) \ - ((((uintptr_t)(_ptr)) & ((_align) - 1)) == 0) - -const char * ec_bin(char * str, size_t size, uint64_t value, int32_t digits); -const char * ec_fop_name(int32_t id); -void ec_trace(const char * event, ec_fop_data_t * fop, const char * fmt, ...); -int32_t ec_bits_consume(uint64_t * n); -size_t ec_iov_copy_to(void * dst, struct iovec * vector, int32_t count, - off_t offset, size_t size); -int32_t ec_buffer_alloc(xlator_t *xl, size_t size, struct iobref **piobref, - void **ptr); -int32_t ec_dict_set_array(dict_t *dict, char *key, - uint64_t *value, int32_t size); -int32_t ec_dict_get_array (dict_t *dict, char *key, uint64_t value[], - int32_t size); - -int32_t ec_dict_del_array(dict_t *dict, char *key, - uint64_t *value, int32_t size); -int32_t ec_dict_set_number(dict_t * dict, char * key, uint64_t value); -int32_t ec_dict_del_number(dict_t * dict, char * key, uint64_t * value); -int32_t ec_dict_set_config(dict_t * dict, char * key, ec_config_t * config); -int32_t ec_dict_del_config(dict_t * dict, char * key, ec_config_t * config); - -int32_t ec_loc_parent(xlator_t *xl, loc_t *loc, loc_t *parent); -int32_t ec_loc_update(xlator_t *xl, loc_t *loc, inode_t *inode, - struct iatt *iatt); - -int32_t ec_loc_from_fd(xlator_t * xl, loc_t * loc, fd_t * fd); -int32_t ec_loc_from_loc(xlator_t * xl, loc_t * dst, loc_t * src); - -void ec_owner_set(call_frame_t * frame, void * owner); -void ec_owner_copy(call_frame_t * frame, gf_lkowner_t * owner); - -ec_inode_t * __ec_inode_get(inode_t * inode, xlator_t * xl); -ec_inode_t * ec_inode_get(inode_t * inode, xlator_t * xl); -ec_fd_t * __ec_fd_get(fd_t * fd, xlator_t * xl); -ec_fd_t * ec_fd_get(fd_t * fd, xlator_t * xl); +#define EC_ALIGN_CHECK(_ptr, _align) ((((uintptr_t)(_ptr)) & ((_align)-1)) == 0) + +const char * +ec_bin(char *str, size_t size, uint64_t value, int32_t digits); +const char * +ec_fop_name(int32_t id); +void +ec_trace(const char *event, ec_fop_data_t *fop, const char *fmt, ...); +int32_t +ec_bits_consume(uint64_t *n); +size_t +ec_iov_copy_to(void *dst, struct iovec *vector, int32_t count, off_t offset, + size_t size); +int32_t +ec_buffer_alloc(xlator_t *xl, size_t size, struct iobref **piobref, void **ptr); +int32_t +ec_dict_set_array(dict_t *dict, char *key, uint64_t *value, int32_t size); +int32_t +ec_dict_get_array(dict_t *dict, char *key, uint64_t value[], int32_t size); + +int32_t +ec_dict_del_array(dict_t *dict, char *key, uint64_t *value, int32_t size); +int32_t +ec_dict_set_number(dict_t *dict, char *key, uint64_t value); +int32_t +ec_dict_del_number(dict_t *dict, char *key, uint64_t *value); +int32_t +ec_dict_set_config(dict_t *dict, char *key, ec_config_t *config); +int32_t +ec_dict_del_config(dict_t *dict, char *key, ec_config_t *config); + +int32_t +ec_loc_parent(xlator_t *xl, loc_t *loc, loc_t *parent); +int32_t +ec_loc_update(xlator_t *xl, loc_t *loc, inode_t *inode, struct iatt *iatt); + +int32_t +ec_loc_from_fd(xlator_t *xl, loc_t *loc, fd_t *fd); +int32_t +ec_loc_from_loc(xlator_t *xl, loc_t *dst, loc_t *src); + +void +ec_owner_set(call_frame_t *frame, void *owner); +void +ec_owner_copy(call_frame_t *frame, gf_lkowner_t *owner); + +ec_inode_t * +__ec_inode_get(inode_t *inode, xlator_t *xl); +ec_inode_t * +ec_inode_get(inode_t *inode, xlator_t *xl); +ec_fd_t * +__ec_fd_get(fd_t *fd, xlator_t *xl); +ec_fd_t * +ec_fd_get(fd_t *fd, xlator_t *xl); static inline uint32_t ec_adjust_size_down(ec_t *ec, uint64_t *value, gf_boolean_t scale) { - uint64_t head, tmp; + uint64_t head, tmp; - tmp = *value; - head = tmp % ec->stripe_size; - tmp -= head; + tmp = *value; + head = tmp % ec->stripe_size; + tmp -= head; - if (scale) { - tmp /= ec->fragments; - } + if (scale) { + tmp /= ec->fragments; + } - *value = tmp; + *value = tmp; - return (uint32_t)head; + return (uint32_t)head; } /* This function can cause an overflow if the passed value is too near to the @@ -79,35 +96,35 @@ ec_adjust_size_down(ec_t *ec, uint64_t *value, gf_boolean_t scale) static inline int32_t ec_adjust_size_up(ec_t *ec, uint64_t *value, gf_boolean_t scale) { - uint64_t tmp; - int32_t tail; - - tmp = *value; - /* We first adjust the value down. This never causes overflow. */ - tail = ec_adjust_size_down(ec, &tmp, scale); - - /* If the value was already aligned, tail will be 0 and nothing else - * needs to be done. */ - if (tail != 0) { - /* Otherwise, we need to compute the real tail and adjust the - * returned value to the next stripe. */ - tail = ec->stripe_size - tail; - if (scale) { - tmp += ec->fragment_size; - } else { - tmp += ec->stripe_size; - /* If no scaling is requested there's a possibility of - * overflow. */ - if (tmp < ec->stripe_size) { - tmp = UINT64_MAX; - tail = -tail; - } - } + uint64_t tmp; + int32_t tail; + + tmp = *value; + /* We first adjust the value down. This never causes overflow. */ + tail = ec_adjust_size_down(ec, &tmp, scale); + + /* If the value was already aligned, tail will be 0 and nothing else + * needs to be done. */ + if (tail != 0) { + /* Otherwise, we need to compute the real tail and adjust the + * returned value to the next stripe. */ + tail = ec->stripe_size - tail; + if (scale) { + tmp += ec->fragment_size; + } else { + tmp += ec->stripe_size; + /* If no scaling is requested there's a possibility of + * overflow. */ + if (tmp < ec->stripe_size) { + tmp = UINT64_MAX; + tail = -tail; + } } + } - *value = tmp; + *value = tmp; - return tail; + return tail; } /* This function is equivalent to ec_adjust_size_down() but with a potentially @@ -115,19 +132,19 @@ ec_adjust_size_up(ec_t *ec, uint64_t *value, gf_boolean_t scale) static inline uint32_t ec_adjust_offset_down(ec_t *ec, off_t *value, gf_boolean_t scale) { - off_t head, tmp; + off_t head, tmp; - tmp = *value; - head = tmp % ec->stripe_size; - tmp -= head; + tmp = *value; + head = tmp % ec->stripe_size; + tmp -= head; - if (scale) { - tmp /= ec->fragments; - } + if (scale) { + tmp /= ec->fragments; + } - *value = tmp; + *value = tmp; - return (uint32_t)head; + return (uint32_t)head; } /* This function is equivalent to ec_adjust_size_up() but with a potentially @@ -135,48 +152,49 @@ ec_adjust_offset_down(ec_t *ec, off_t *value, gf_boolean_t scale) static inline int32_t ec_adjust_offset_up(ec_t *ec, off_t *value, gf_boolean_t scale) { - uint64_t tail, tmp; - - /* An offset is a signed type that can only have positive values, so - * we take advantage of this to avoid overflows. We simply convert it - * to an unsigned integer and operate normally. This won't cause an - * overflow. Overflow is only checked when converting back to an - * off_t. */ - tmp = *value; - tail = ec->stripe_size; - tail -= (tmp + tail - 1) % tail + 1; - tmp += tail; - if (scale) { - /* If we are scaling, we'll never get an overflow. */ - tmp /= ec->fragments; - } else { - /* Check if there has been an overflow. */ - if ((off_t)tmp < 0) { - tmp = GF_OFF_MAX; - tail = -tail; - } + uint64_t tail, tmp; + + /* An offset is a signed type that can only have positive values, so + * we take advantage of this to avoid overflows. We simply convert it + * to an unsigned integer and operate normally. This won't cause an + * overflow. Overflow is only checked when converting back to an + * off_t. */ + tmp = *value; + tail = ec->stripe_size; + tail -= (tmp + tail - 1) % tail + 1; + tmp += tail; + if (scale) { + /* If we are scaling, we'll never get an overflow. */ + tmp /= ec->fragments; + } else { + /* Check if there has been an overflow. */ + if ((off_t)tmp < 0) { + tmp = GF_OFF_MAX; + tail = -tail; } + } - *value = (off_t)tmp; + *value = (off_t)tmp; - return (int32_t)tail; + return (int32_t)tail; } -static inline int32_t ec_is_power_of_2(uint32_t value) +static inline int32_t +ec_is_power_of_2(uint32_t value) { return (value != 0) && ((value & (value - 1)) == 0); } gf_boolean_t -ec_is_internal_xattr (dict_t *dict, char *key, data_t *value, void *data); +ec_is_internal_xattr(dict_t *dict, char *key, data_t *value, void *data); void -ec_filter_internal_xattrs (dict_t *xattr); +ec_filter_internal_xattrs(dict_t *xattr); gf_boolean_t -ec_is_data_fop (glusterfs_fop_t fop); +ec_is_data_fop(glusterfs_fop_t fop); int32_t -ec_launch_replace_heal (ec_t *ec); +ec_launch_replace_heal(ec_t *ec); #endif /* __EC_HELPERS_H__ */ |