diff options
Diffstat (limited to 'xlators/storage/posix')
| -rw-r--r-- | xlators/storage/posix/src/posix.c | 128 |
1 files changed, 118 insertions, 10 deletions
diff --git a/xlators/storage/posix/src/posix.c b/xlators/storage/posix/src/posix.c index c86f8894d69..d8f64c1e848 100644 --- a/xlators/storage/posix/src/posix.c +++ b/xlators/storage/posix/src/posix.c @@ -4840,6 +4840,99 @@ __add_long_array (int64_t *dest, int64_t *src, int count) } } + +/* functions: + __add_array_with_default + __add_long_array_with_default + + xattrop type: + GF_XATTROP_ADD_ARRAY_WITH_DEFAULT + GF_XATTROP_ADD_ARRAY64_WITH_DEFAULT + + These operations are similar to 'GF_XATTROP_ADD_ARRAY', + except that it adds a default value if xattr is missing + or its value is zero on disk. + + One use-case of this operation is in inode-quota. + When a new directory is created, its default dir_count + should be set to 1. So when a xattrop performed setting + inode-xattrs, it should account initial dir_count + 1 if the xattrs are not present + + Here is the usage of this operation + + value required in xdata for each key + struct array { + int32_t newvalue_1; + int32_t newvalue_2; + ... + int32_t newvalue_n; + int32_t default_1; + int32_t default_2; + ... + int32_t default_n; + }; + + or + + struct array { + int32_t value_1; + int32_t value_2; + ... + int32_t value_n; + } data[2]; + fill data[0] with new value to add + fill data[1] with default value + + xattrop GF_XATTROP_ADD_ARRAY_WITH_DEFAULT + for i from 1 to n + { + if (xattr (dest_i) is zero or not set in the disk) + dest_i = newvalue_i + default_i + else + dest_i = dest_i + newvalue_i + } + + value in xdata after xattrop is successful + struct array { + int32_t dest_1; + int32_t dest_2; + ... + int32_t dest_n; + }; +*/ +static void +__add_array_with_default (int32_t *dest, int32_t *src, int count) +{ + int i = 0; + int32_t destval = 0; + + for (i = 0; i < count; i++) { + destval = ntoh32 (dest[i]); + if (destval == 0) + dest[i] = hton32 (ntoh32 (src[i]) + + ntoh32 (src[count + i])); + else + dest[i] = hton32 (destval + ntoh32 (src[i])); + } +} + +static void +__add_long_array_with_default (int64_t *dest, int64_t *src, int count) +{ + int i = 0; + int64_t destval = 0; + + for (i = 0; i < count; i++) { + destval = ntoh64 (dest[i]); + if (destval == 0) + dest[i] = hton64 (ntoh64 (src[i]) + + ntoh64 (src[i + count])); + else + dest[i] = hton64 (destval + ntoh64 (src[i])); + } +} + static int _posix_handle_xattr_keyvalue_pair (dict_t *d, char *k, data_t *v, void *tmp) @@ -4861,6 +4954,10 @@ _posix_handle_xattr_keyvalue_pair (dict_t *d, char *k, data_t *v, this = filler->this; inode = filler->inode; count = v->len; + if (optype == GF_XATTROP_ADD_ARRAY_WITH_DEFAULT || + optype == GF_XATTROP_ADD_ARRAY64_WITH_DEFAULT) + count = count / 2; + array = GF_CALLOC (count, sizeof (char), gf_posix_mt_char); #ifdef GF_DARWIN_HOST_OS @@ -4877,10 +4974,10 @@ _posix_handle_xattr_keyvalue_pair (dict_t *d, char *k, data_t *v, { if (filler->real_path) { size = sys_lgetxattr (filler->real_path, k, - (char *)array, v->len); + (char *)array, count); } else { size = sys_fgetxattr (filler->fdnum, k, (char *)array, - v->len); + count); } op_errno = errno; @@ -4925,24 +5022,35 @@ _posix_handle_xattr_keyvalue_pair (dict_t *d, char *k, data_t *v, * * If the xattr does not exist, a value of all 0's is returned * without creating it. */ - size = v->len; + size = count; if (optype != GF_XATTROP_GET_AND_SET && mem_0filled(v->data, v->len) == 0) goto unlock; + dst_data = array; switch (optype) { case GF_XATTROP_ADD_ARRAY: __add_array ((int32_t *) array, - (int32_t *) v->data, v->len / 4); - dst_data = array; + (int32_t *) v->data, count / 4); break; case GF_XATTROP_ADD_ARRAY64: __add_long_array ((int64_t *) array, (int64_t *) v->data, - v->len / 8); - dst_data = array; + count / 8); + break; + + case GF_XATTROP_ADD_ARRAY_WITH_DEFAULT: + __add_array_with_default ((int32_t *) array, + (int32_t *) v->data, + count / 4); + break; + + case GF_XATTROP_ADD_ARRAY64_WITH_DEFAULT: + __add_long_array_with_default ((int64_t *) array, + (int64_t *) v->data, + count / 8); break; case GF_XATTROP_GET_AND_SET: @@ -4962,11 +5070,11 @@ _posix_handle_xattr_keyvalue_pair (dict_t *d, char *k, data_t *v, if (filler->real_path) { size = sys_lsetxattr (filler->real_path, k, - dst_data, v->len, 0); + dst_data, count, 0); } else { size = sys_fsetxattr (filler->fdnum, k, (char *)dst_data, - v->len, 0); + count, 0); } op_errno = errno; } @@ -4992,7 +5100,7 @@ unlock: op_ret = -1; goto out; } else if (array) { - op_ret = dict_set_bin (filler->xattr, k, array, v->len); + op_ret = dict_set_bin (filler->xattr, k, array, count); if (op_ret) { if (filler->real_path) gf_msg_debug (this->name, 0, |