diff options
Diffstat (limited to 'fsmonitor.c')
| -rw-r--r-- | fsmonitor.c | 75 |
1 files changed, 64 insertions, 11 deletions
diff --git a/fsmonitor.c b/fsmonitor.c index 9860587225..932bd9012d 100644 --- a/fsmonitor.c +++ b/fsmonitor.c @@ -8,7 +8,8 @@ #define INDEX_EXTENSION_VERSION1 (1) #define INDEX_EXTENSION_VERSION2 (2) -#define HOOK_INTERFACE_VERSION (1) +#define HOOK_INTERFACE_VERSION1 (1) +#define HOOK_INTERFACE_VERSION2 (2) struct trace_key trace_fsmonitor = TRACE_KEY_INIT(FSMONITOR); @@ -25,6 +26,22 @@ static void fsmonitor_ewah_callback(size_t pos, void *is) ce->ce_flags &= ~CE_FSMONITOR_VALID; } +static int fsmonitor_hook_version(void) +{ + int hook_version; + + if (git_config_get_int("core.fsmonitorhookversion", &hook_version)) + return -1; + + if (hook_version == HOOK_INTERFACE_VERSION1 || + hook_version == HOOK_INTERFACE_VERSION2) + return hook_version; + + warning("Invalid hook version '%i' in core.fsmonitorhookversion. " + "Must be 1 or 2.", hook_version); + return -1; +} + int read_fsmonitor_extension(struct index_state *istate, const void *data, unsigned long sz) { @@ -158,8 +175,8 @@ static void fsmonitor_refresh_callback(struct index_state *istate, const char *n void refresh_fsmonitor(struct index_state *istate) { struct strbuf query_result = STRBUF_INIT; - int query_success = 0; - size_t bol; /* beginning of line */ + int query_success = 0, hook_version = -1; + size_t bol = 0; /* beginning of line */ uint64_t last_update; struct strbuf last_update_token = STRBUF_INIT; char *buf; @@ -167,6 +184,9 @@ void refresh_fsmonitor(struct index_state *istate) if (!core_fsmonitor || istate->fsmonitor_has_run_once) return; + + hook_version = fsmonitor_hook_version(); + istate->fsmonitor_has_run_once = 1; trace_printf_key(&trace_fsmonitor, "refresh fsmonitor"); @@ -175,27 +195,60 @@ void refresh_fsmonitor(struct index_state *istate) * should be inclusive to ensure we don't miss potential changes. */ last_update = getnanotime(); - strbuf_addf(&last_update_token, "%"PRIu64"", last_update); + if (hook_version == HOOK_INTERFACE_VERSION1) + strbuf_addf(&last_update_token, "%"PRIu64"", last_update); /* - * If we have a last update time, call query_fsmonitor for the set of - * changes since that time, else assume everything is possibly dirty + * If we have a last update token, call query_fsmonitor for the set of + * changes since that token, else assume everything is possibly dirty * and check it all. */ if (istate->fsmonitor_last_update) { - query_success = !query_fsmonitor(HOOK_INTERFACE_VERSION, - istate->fsmonitor_last_update, &query_result); + if (hook_version == -1 || hook_version == HOOK_INTERFACE_VERSION2) { + query_success = !query_fsmonitor(HOOK_INTERFACE_VERSION2, + istate->fsmonitor_last_update, &query_result); + + if (query_success) { + if (hook_version < 0) + hook_version = HOOK_INTERFACE_VERSION2; + + /* + * First entry will be the last update token + * Need to use a char * variable because static + * analysis was suggesting to use strbuf_addbuf + * but we don't want to copy the entire strbuf + * only the the chars up to the first NUL + */ + buf = query_result.buf; + strbuf_addstr(&last_update_token, buf); + if (!last_update_token.len) { + warning("Empty last update token."); + query_success = 0; + } else { + bol = last_update_token.len + 1; + } + } else if (hook_version < 0) { + hook_version = HOOK_INTERFACE_VERSION1; + if (!last_update_token.len) + strbuf_addf(&last_update_token, "%"PRIu64"", last_update); + } + } + + if (hook_version == HOOK_INTERFACE_VERSION1) { + query_success = !query_fsmonitor(HOOK_INTERFACE_VERSION1, + istate->fsmonitor_last_update, &query_result); + } + trace_performance_since(last_update, "fsmonitor process '%s'", core_fsmonitor); trace_printf_key(&trace_fsmonitor, "fsmonitor process '%s' returned %s", core_fsmonitor, query_success ? "success" : "failure"); } /* a fsmonitor process can return '/' to indicate all entries are invalid */ - if (query_success && query_result.buf[0] != '/') { + if (query_success && query_result.buf[bol] != '/') { /* Mark all entries returned by the monitor as dirty */ buf = query_result.buf; - bol = 0; - for (i = 0; i < query_result.len; i++) { + for (i = bol; i < query_result.len; i++) { if (buf[i] != '\0') continue; fsmonitor_refresh_callback(istate, buf + bol); |