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Implement release callback

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Not doing anything yet, but will be needed for zero-copy
This commit is contained in:
Tor Arne Vestbø
2012-10-14 13:51:47 +02:00
parent 4bcb457c24
commit c08a2b8728
1 changed files with 19 additions and 0 deletions
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19
sparsebundlefs.cpp
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@@ -27,6 +27,7 @@ struct sparsebundle_data {
char *path;
off_t band_size;
off_t size;
off_t times_opened;
};
#define SB_DATA_CAST(ptr) ((struct sparsebundle_data *) ptr)
@@ -70,6 +71,10 @@ static int sparsebundle_open(const char *path, struct fuse_file_info *fi)
if ((fi->flags & O_ACCMODE) != O_RDONLY)
return -EACCES;
SB_DATA->times_opened++;
syslog(LOG_DEBUG, "opened %s, now referenced %llx times",
SB_DATA->path, SB_DATA->times_opened);
return 0;
}
@@ -139,6 +144,19 @@ static int sparsebundle_read(const char *path, char *buffer, size_t length, off_
return bytes_read;
}
static int sparsebundle_release(const char *path, struct fuse_file_info *fi)
{
SB_DATA->times_opened--;
syslog(LOG_DEBUG, "closed %s, now referenced %llx times",
SB_DATA->path, SB_DATA->times_opened);
if (SB_DATA->times_opened == 0) {
syslog(LOG_DEBUG, "no more references to sparsebundle, cleaning up");
}
return 0;
}
static int sparsebundle_show_usage(char *program_name)
{
fprintf(stderr, "usage: %s [-o options] [-f] [-D] <sparsebundle> <mountpoint>\n", program_name);
@@ -238,6 +256,7 @@ int main(int argc, char **argv)
sparsebundle_filesystem_operations.open = sparsebundle_open;
sparsebundle_filesystem_operations.read = sparsebundle_read;
sparsebundle_filesystem_operations.readdir = sparsebundle_readdir;
sparsebundle_filesystem_operations.release = sparsebundle_release;
return fuse_main(args.argc, args.argv, &sparsebundle_filesystem_operations, &data);
}