diff options
Diffstat (limited to 'xlators/features/changelog/src/changelog-encoders.c')
| -rw-r--r-- | xlators/features/changelog/src/changelog-encoders.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/xlators/features/changelog/src/changelog-encoders.c b/xlators/features/changelog/src/changelog-encoders.c new file mode 100644 index 00000000000..63754516c2e --- /dev/null +++ b/xlators/features/changelog/src/changelog-encoders.c @@ -0,0 +1,232 @@ +/* + Copyright (c) 2013 Red Hat, Inc. <http://www.redhat.com> + 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. +*/ + +#include "changelog-encoders.h" + +size_t +entry_fn(void *data, char *buffer, gf_boolean_t encode) +{ + char *tmpbuf = NULL; + size_t bufsz = 0; + struct changelog_entry_fields *ce = NULL; + + ce = (struct changelog_entry_fields *)data; + + if (encode) { + tmpbuf = uuid_utoa(ce->cef_uuid); + CHANGELOG_FILL_BUFFER(buffer, bufsz, tmpbuf, strlen(tmpbuf)); + } else { + CHANGELOG_FILL_BUFFER(buffer, bufsz, ce->cef_uuid, sizeof(uuid_t)); + } + + CHANGELOG_FILL_BUFFER(buffer, bufsz, "/", 1); + CHANGELOG_FILL_BUFFER(buffer, bufsz, ce->cef_bname, strlen(ce->cef_bname)); + return bufsz; +} + +size_t +del_entry_fn(void *data, char *buffer, gf_boolean_t encode) +{ + char *tmpbuf = NULL; + size_t bufsz = 0; + struct changelog_entry_fields *ce = NULL; + + ce = (struct changelog_entry_fields *)data; + + if (encode) { + tmpbuf = uuid_utoa(ce->cef_uuid); + CHANGELOG_FILL_BUFFER(buffer, bufsz, tmpbuf, strlen(tmpbuf)); + } else { + CHANGELOG_FILL_BUFFER(buffer, bufsz, ce->cef_uuid, sizeof(uuid_t)); + } + + CHANGELOG_FILL_BUFFER(buffer, bufsz, "/", 1); + CHANGELOG_FILL_BUFFER(buffer, bufsz, ce->cef_bname, strlen(ce->cef_bname)); + CHANGELOG_FILL_BUFFER(buffer, bufsz, "\0", 1); + + if (ce->cef_path[0] == '\0') { + CHANGELOG_FILL_BUFFER(buffer, bufsz, "\0", 1); + } else { + CHANGELOG_FILL_BUFFER(buffer, bufsz, ce->cef_path, + strlen(ce->cef_path)); + } + + return bufsz; +} + +size_t +fop_fn(void *data, char *buffer, gf_boolean_t encode) +{ + char buf[10] = { + 0, + }; + size_t bufsz = 0; + glusterfs_fop_t fop = 0; + + fop = *(glusterfs_fop_t *)data; + + if (encode) { + (void)snprintf(buf, sizeof(buf), "%d", fop); + CHANGELOG_FILL_BUFFER(buffer, bufsz, buf, strlen(buf)); + } else + CHANGELOG_FILL_BUFFER(buffer, bufsz, &fop, sizeof(fop)); + + return bufsz; +} + +size_t +number_fn(void *data, char *buffer, gf_boolean_t encode) +{ + size_t bufsz = 0; + unsigned int nr = 0; + char buf[20] = { + 0, + }; + + nr = *(unsigned int *)data; + + if (encode) { + (void)snprintf(buf, sizeof(buf), "%u", nr); + CHANGELOG_FILL_BUFFER(buffer, bufsz, buf, strlen(buf)); + } else + CHANGELOG_FILL_BUFFER(buffer, bufsz, &nr, sizeof(unsigned int)); + + return bufsz; +} + +void +entry_free_fn(void *data) +{ + changelog_opt_t *co = data; + + if (!co) + return; + + GF_FREE(co->co_entry.cef_bname); +} + +void +del_entry_free_fn(void *data) +{ + changelog_opt_t *co = data; + + if (!co) + return; + + GF_FREE(co->co_entry.cef_bname); + GF_FREE(co->co_entry.cef_path); +} + +/** + * try to write all data in one shot + */ + +static void +changelog_encode_write_xtra(changelog_log_data_t *cld, char *buffer, + size_t *off, gf_boolean_t encode) +{ + int i = 0; + size_t offset = 0; + void *data = NULL; + changelog_opt_t *co = NULL; + + offset = *off; + + co = (changelog_opt_t *)cld->cld_ptr; + + for (; i < cld->cld_xtra_records; i++, co++) { + CHANGELOG_FILL_BUFFER(buffer, offset, "\0", 1); + + switch (co->co_type) { + case CHANGELOG_OPT_REC_FOP: + data = &co->co_fop; + break; + case CHANGELOG_OPT_REC_ENTRY: + data = &co->co_entry; + break; + case CHANGELOG_OPT_REC_UINT32: + data = &co->co_uint32; + break; + } + + if (co->co_convert) + offset += co->co_convert(data, buffer + offset, encode); + else /* no coversion: write it out as it is */ + CHANGELOG_FILL_BUFFER(buffer, offset, data, co->co_len); + } + + *off = offset; +} + +int +changelog_encode_ascii(xlator_t *this, changelog_log_data_t *cld) +{ + size_t off = 0; + size_t gfid_len = 0; + char *gfid_str = NULL; + char *buffer = NULL; + changelog_priv_t *priv = NULL; + + priv = this->private; + + gfid_str = uuid_utoa(cld->cld_gfid); + gfid_len = strlen(gfid_str); + + /* extra bytes for decorations */ + buffer = alloca(gfid_len + cld->cld_ptr_len + 10); + CHANGELOG_STORE_ASCII(priv, buffer, off, gfid_str, gfid_len, cld); + + if (cld->cld_xtra_records) + changelog_encode_write_xtra(cld, buffer, &off, _gf_true); + + CHANGELOG_FILL_BUFFER(buffer, off, "\0", 1); + + return changelog_write_change(priv, buffer, off); +} + +int +changelog_encode_binary(xlator_t *this, changelog_log_data_t *cld) +{ + size_t off = 0; + char *buffer = NULL; + changelog_priv_t *priv = NULL; + + priv = this->private; + + /* extra bytes for decorations */ + buffer = alloca(sizeof(uuid_t) + cld->cld_ptr_len + 10); + CHANGELOG_STORE_BINARY(priv, buffer, off, cld->cld_gfid, cld); + + if (cld->cld_xtra_records) + changelog_encode_write_xtra(cld, buffer, &off, _gf_false); + + CHANGELOG_FILL_BUFFER(buffer, off, "\0", 1); + + return changelog_write_change(priv, buffer, off); +} + +static struct changelog_encoder cb_encoder[] = { + [CHANGELOG_ENCODE_BINARY] = + { + .encoder = CHANGELOG_ENCODE_BINARY, + .encode = changelog_encode_binary, + }, + [CHANGELOG_ENCODE_ASCII] = + { + .encoder = CHANGELOG_ENCODE_ASCII, + .encode = changelog_encode_ascii, + }, +}; + +void +changelog_encode_change(changelog_priv_t *priv) +{ + priv->ce = &cb_encoder[priv->encode_mode]; +} |