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fsmonitor: delay updating state until after split index is merged

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If the fsmonitor extension is used in conjunction with the split index
extension, the set of entries in the index when it is first loaded is
only a subset of the real index.  This leads to only the non-"base"
index being marked as CE_FSMONITOR_VALID.

Delay the expansion of the ewah bitmap until after tweak_split_index
has been called to merge in the base index as well.

The new fsmonitor_dirty is kept from being leaked by dint of being
cleaned up in post_read_index_from, which is guaranteed to be called
after do_read_index in read_index_from.

Signed-off-by: Alex Vandiver <alexmv@dropbox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Alex Vandiver 2017-10-27 16:26:37 -07:00 committed by Junio C Hamano
parent bd76afd13d
commit ba1b9caca6
2 changed files with 25 additions and 16 deletions
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1
cache.h
View File

@ -347,6 +347,7 @@ struct index_state {
unsigned char sha1[20];
struct untracked_cache *untracked;
uint64_t fsmonitor_last_update;
struct ewah_bitmap *fsmonitor_dirty;
};
extern struct index_state the_index;

40
fsmonitor.c
View File

@ -26,7 +26,6 @@ int read_fsmonitor_extension(struct index_state *istate, const void *data,
uint32_t hdr_version;
uint32_t ewah_size;
struct ewah_bitmap *fsmonitor_dirty;
int i;
int ret;
if (sz < sizeof(uint32_t) + sizeof(uint64_t) + sizeof(uint32_t))
@ -49,20 +48,7 @@ int read_fsmonitor_extension(struct index_state *istate, const void *data,
ewah_free(fsmonitor_dirty);
return error("failed to parse ewah bitmap reading fsmonitor index extension");
}
if (git_config_get_fsmonitor()) {
/* Mark all entries valid */
for (i = 0; i < istate->cache_nr; i++)
istate->cache[i]->ce_flags |= CE_FSMONITOR_VALID;
/* Mark all previously saved entries as dirty */
ewah_each_bit(fsmonitor_dirty, fsmonitor_ewah_callback, istate);
/* Now mark the untracked cache for fsmonitor usage */
if (istate->untracked)
istate->untracked->use_fsmonitor = 1;
}
ewah_free(fsmonitor_dirty);
istate->fsmonitor_dirty = fsmonitor_dirty;
trace_printf_key(&trace_fsmonitor, "read fsmonitor extension successful");
return 0;
@ -239,7 +225,29 @@ void remove_fsmonitor(struct index_state *istate)
void tweak_fsmonitor(struct index_state *istate)
{
switch (git_config_get_fsmonitor()) {
int i;
int fsmonitor_enabled = git_config_get_fsmonitor();
if (istate->fsmonitor_dirty) {
if (fsmonitor_enabled) {
/* Mark all entries valid */
for (i = 0; i < istate->cache_nr; i++) {
istate->cache[i]->ce_flags |= CE_FSMONITOR_VALID;
}
/* Mark all previously saved entries as dirty */
ewah_each_bit(istate->fsmonitor_dirty, fsmonitor_ewah_callback, istate);
/* Now mark the untracked cache for fsmonitor usage */
if (istate->untracked)
istate->untracked->use_fsmonitor = 1;
}
ewah_free(istate->fsmonitor_dirty);
istate->fsmonitor_dirty = NULL;
}
switch (fsmonitor_enabled) {
case -1: /* keep: do nothing */
break;
case 0: /* false */