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filters: sysfs use device_id_sysfs_dir

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This is mainly useful in internal testing - but keep sysfs dir also
passed to filter.
Also drop use of static variable within sysfs filter and base whole
config at creation time.
This commit is contained in:
Zdenek Kabelac 2023-10-03 18:39:39 +02:00
parent 0e8c631f5e
commit cf46f4baee
3 changed files with 31 additions and 41 deletions
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2
lib/commands/toolcontext.c
View File

@ -1229,7 +1229,7 @@ static struct dev_filter *_init_filter_chain(struct cmd_context *cmd)
* (currently not used for devs match to device id using syfs)
*/
if (find_config_tree_bool(cmd, devices_sysfs_scan_CFG, NULL)) {
if ((filters[nr_filt] = sysfs_filter_create()))
if ((filters[nr_filt] = sysfs_filter_create(cmd->device_id_sysfs_dir ?: dm_sysfs_dir())))
nr_filt++;
}

68
lib/filters/filter-sysfs.c
View File

@ -15,19 +15,14 @@
#include "lib/misc/lib.h"
#include "lib/filters/filter.h"
static int _sys_dev_block_found;
#ifdef __linux__
static int _accept_p(struct cmd_context *cmd, struct dev_filter *f, struct device *dev, const char *use_filter_name)
{
char path[PATH_MAX];
const char *sysfs_dir;
const char *sysfs_dir = f->private;
struct stat info;
if (!_sys_dev_block_found)
return 1;
dev->filtered_flags &= ~DEV_FILTERED_SYSFS;
/*
@ -37,19 +32,16 @@ static int _accept_p(struct cmd_context *cmd, struct dev_filter *f, struct devic
if (dev->id && dev->id->idtype && (dev->id->idtype != DEV_ID_TYPE_DEVNAME))
return 1;
sysfs_dir = dm_sysfs_dir();
if (sysfs_dir && *sysfs_dir) {
if (dm_snprintf(path, sizeof(path), "%sdev/block/%d:%d",
sysfs_dir, (int)MAJOR(dev->dev), (int)MINOR(dev->dev)) < 0) {
log_debug("failed to create sysfs path");
return 1;
}
if (dm_snprintf(path, sizeof(path), "%sdev/block/%d:%d",
sysfs_dir, (int)MAJOR(dev->dev), (int)MINOR(dev->dev)) < 0) {
log_debug("failed to create sysfs path");
return 1;
}
if (lstat(path, &info)) {
log_debug_devs("%s: Skipping (sysfs)", dev_name(dev));
dev->filtered_flags |= DEV_FILTERED_SYSFS;
return 0;
}
if (lstat(path, &info)) {
log_debug_devs("%s: Skipping (sysfs)", dev_name(dev));
dev->filtered_flags |= DEV_FILTERED_SYSFS;
return 0;
}
return 1;
@ -62,53 +54,51 @@ static void _destroy(struct dev_filter *f)
free(f);
}
static void _check_sys_dev_block(void)
static int _check_sys_dev_block(const char *sysfs_dir)
{
char path[PATH_MAX];
const char *sysfs_dir;
struct stat info;
sysfs_dir = dm_sysfs_dir();
if (sysfs_dir && *sysfs_dir) {
if (dm_snprintf(path, sizeof(path), "%sdev/block", sysfs_dir) < 0)
return;
if (dm_snprintf(path, sizeof(path), "%sdev/block", sysfs_dir) < 0)
return_0;
if (lstat(path, &info)) {
log_debug("filter-sysfs disabled: /sys/dev/block not found");
_sys_dev_block_found = 0;
} else {
_sys_dev_block_found = 1;
}
if (lstat(path, &info)) {
log_debug("filter-sysfs disabled: /sys/dev/block not found");
return 0;
}
return 1;
}
struct dev_filter *sysfs_filter_create(void)
struct dev_filter *sysfs_filter_create(const char *sysfs_dir)
{
const char *sysfs_dir = dm_sysfs_dir();
struct dev_filter *f;
size_t len;
if (!*sysfs_dir) {
if (!sysfs_dir || *sysfs_dir) {
log_verbose("No proc filesystem found: skipping sysfs filter");
return NULL;
}
/* support old kernels that don't have this */
_check_sys_dev_block();
if (!_check_sys_dev_block(sysfs_dir))
return NULL;
if (!(f = zalloc(sizeof(*f))))
goto_bad;
len = strlen(sysfs_dir) + 1;
if (!(f = zalloc(sizeof(*f) + len)))
return NULL;
f->passes_filter = _accept_p;
f->destroy = _destroy;
f->use_count = 0;
f->name = "sysfs";
memcpy(f + 1, sysfs_dir, len);
f->private = (f + 1);
log_debug_devs("Sysfs filter initialised.");
return f;
bad:
return NULL;
}
#else

2
lib/filters/filter.h
View File

@ -28,7 +28,7 @@ struct dev_filter *fwraid_filter_create(struct dev_types *dt);
struct dev_filter *mpath_filter_create(struct dev_types *dt);
struct dev_filter *partitioned_filter_create(struct dev_types *dt);
struct dev_filter *persistent_filter_create(struct dev_types *dt, struct dev_filter *f);
struct dev_filter *sysfs_filter_create(void);
struct dev_filter *sysfs_filter_create(const char *sysfs_dir);
struct dev_filter *signature_filter_create(struct dev_types *dt);
struct dev_filter *deviceid_filter_create(struct cmd_context *cmd);