Gitweb: http://git.fedorahosted.org/git/?p=lvm2.git;a=commitdiff;h=f40dfb48ad0114c89... Commit: f40dfb48ad0114c89ac5fc0a8670a3792565e9a9 Parent: e6768997e192e26aaf091b6ed2700a3391f178b5 Author: Alasdair G Kergon agk@redhat.com AuthorDate: Fri Apr 8 16:27:12 2016 +0100 Committer: Alasdair G Kergon agk@redhat.com CommitterDate: Fri Apr 8 16:27:12 2016 +0100
activation: Skip another non-prefixed info ioctl.
_percent() also does a lookup by dm uuid. Also get kernel version from cmd->kernel_vsn. --- lib/activate/activate.c | 4 +- lib/activate/dev_manager.c | 60 ++++++++++++++++++++++++------------------- lib/activate/dev_manager.h | 3 +- 3 files changed, 37 insertions(+), 30 deletions(-)
diff --git a/lib/activate/activate.c b/lib/activate/activate.c index 985d6b9..ca82518 100644 --- a/lib/activate/activate.c +++ b/lib/activate/activate.c @@ -660,7 +660,7 @@ static int _lv_info(struct cmd_context *cmd, const struct logical_volume *lv, /* New thin-pool has no layer, but -tpool suffix needs to be queried */ if (!use_layer && lv_is_new_thin_pool(lv)) { /* Check if there isn't existing old thin pool mapping in the table */ - if (!dev_manager_info(cmd->mem, lv, NULL, 0, 0, &dminfo, NULL, NULL)) + if (!dev_manager_info(cmd, lv, NULL, 0, 0, &dminfo, NULL, NULL)) return_0; if (!dminfo.exists) use_layer = 1; @@ -669,7 +669,7 @@ static int _lv_info(struct cmd_context *cmd, const struct logical_volume *lv, if (seg_status) seg_status->seg = seg;
- if (!dev_manager_info(cmd->mem, lv, + if (!dev_manager_info(cmd, lv, (use_layer) ? lv_layer(lv) : NULL, with_open_count, with_read_ahead, &dminfo, (info) ? &info->read_ahead : NULL, diff --git a/lib/activate/dev_manager.c b/lib/activate/dev_manager.c index 18e2081..89fa9e9 100644 --- a/lib/activate/dev_manager.c +++ b/lib/activate/dev_manager.c @@ -29,7 +29,6 @@
#include <limits.h> #include <dirent.h> -#include <sys/utsname.h>
#define MAX_TARGET_PARAMSIZE 50000 #define LVM_UDEV_NOSCAN_FLAG DM_SUBSYSTEM_UDEV_FLAG0 @@ -675,25 +674,31 @@ int device_is_usable(struct device *dev, struct dev_usable_check_params check) return r; }
-/* Returns 1 for kernels >= 3.X, otherwise 0 */ -static int _check_new_kernel(void) +/* + * If active LVs were activated by a version of LVM2 before 2.02.00 we must + * perform additional checks to find them because they do not have the LVM- + * prefix on their dm uuids. + * As of 2.02.150, we've chosen to disable this compatibility arbitrarily if + * we're running kernel version 3 or above. + */ +#define MIN_KERNEL_MAJOR 3 + +static int _original_uuid_format_check_required(struct cmd_context *cmd) { - static int major = 0; - struct utsname _uts; + static int _kernel_major = 0;
- if (!major) { - if (uname(&_uts) || - (sscanf(_uts.release, "%d", &major) != 1)) - major = 1; - else if (major >= 3) - log_debug("Not checking for devices without prefix " - UUID_PREFIX " with newer kernel."); + if (!_kernel_major) { + if ((sscanf(cmd->kernel_vsn, "%d", &_kernel_major) != 1)) + _kernel_major = 1; + else if (_kernel_major >= MIN_KERNEL_MAJOR) + log_debug_activation("Skipping checks for old devices without " UUID_PREFIX + " dm uuid prefix (kernel vsn %d >= %d).", _kernel_major, MIN_KERNEL_MAJOR); }
- return (major >= 3); + return (_kernel_major < MIN_KERNEL_MAJOR); }
-static int _info(const char *dlid, int with_open_count, int with_read_ahead, +static int _info(struct cmd_context *cmd, const char *dlid, int with_open_count, int with_read_ahead, struct dm_info *dminfo, uint32_t *read_ahead, struct lv_seg_status *seg_status) { @@ -722,8 +727,8 @@ static int _info(const char *dlid, int with_open_count, int with_read_ahead, } }
- /* With kernels > 3.X skip checking for devices without UUID_PREFIX */ - if (_check_new_kernel()) + /* Must we still check for the pre-2.02.00 dm uuid format? */ + if (!_original_uuid_format_check_required(cmd)) return r;
/* Check for dlid before UUID_PREFIX was added */ @@ -740,7 +745,7 @@ static int _info_by_dev(uint32_t major, uint32_t minor, struct dm_info *info) return _info_run(INFO, NULL, NULL, info, NULL, 0, 0, 0, major, minor); }
-int dev_manager_info(struct dm_pool *mem, const struct logical_volume *lv, +int dev_manager_info(struct cmd_context *cmd, const struct logical_volume *lv, const char *layer, int with_open_count, int with_read_ahead, struct dm_info *dminfo, uint32_t *read_ahead, @@ -749,19 +754,19 @@ int dev_manager_info(struct dm_pool *mem, const struct logical_volume *lv, char *dlid, *name; int r;
- if (!(name = dm_build_dm_name(mem, lv->vg->name, lv->name, layer))) + if (!(name = dm_build_dm_name(cmd->mem, lv->vg->name, lv->name, layer))) return_0;
- if (!(dlid = build_dm_uuid(mem, lv, layer))) { + if (!(dlid = build_dm_uuid(cmd->mem, lv, layer))) { r = 0; goto_out; }
log_debug_activation("Getting device info for %s [%s]", name, dlid); - r = _info(dlid, with_open_count, with_read_ahead, + r = _info(cmd, dlid, with_open_count, with_read_ahead, dminfo, read_ahead, seg_status); out: - dm_pool_free(mem, name); + dm_pool_free(cmd->mem, name);
return r; } @@ -1008,7 +1013,8 @@ static int _percent(struct dev_manager *dm, const char *name, const char *dlid, if (_percent_run(dm, NULL, dlid, target_type, wait, lv, percent, event_nr, fail_if_percent_unsupported)) return 1; - else if (_percent_run(dm, NULL, dlid + sizeof(UUID_PREFIX) - 1, + else if (_original_uuid_format_check_required(dm->cmd) && + _percent_run(dm, NULL, dlid + sizeof(UUID_PREFIX) - 1, target_type, wait, lv, percent, event_nr, fail_if_percent_unsupported)) return 1; @@ -1686,7 +1692,7 @@ static int _add_dev_to_dtree(struct dev_manager *dm, struct dm_tree *dtree, return_0;
log_debug_activation("Getting device info for %s [%s]", name, dlid); - if (!_info(dlid, 1, 0, &info, NULL, NULL)) { + if (!_info(dm->cmd, dlid, 1, 0, &info, NULL, NULL)) { log_error("Failed to get info for %s [%s].", name, dlid); return 0; } @@ -1884,8 +1890,8 @@ static int _pool_callback(struct dm_tree_node *node, log_sys_error("close", argv[args]);
if (ret == (int) DM_ARRAY_SIZE(buf)) { - log_debug("%s skipped, detect empty disk header on %s.", - argv[0], argv[args]); + log_debug_activation("%s skipped, detect empty disk header on %s.", + argv[0], argv[args]); return 1; } } @@ -2210,7 +2216,7 @@ static char *_add_error_device(struct dev_manager *dm, struct dm_tree *dtree, return_NULL;
log_debug_activation("Getting device info for %s [%s]", name, dlid); - if (!_info(dlid, 1, 0, &info, NULL, NULL)) { + if (!_info(dm->cmd, dlid, 1, 0, &info, NULL, NULL)) { log_error("Failed to get info for %s [%s].", name, dlid); return 0; } diff --git a/lib/activate/dev_manager.h b/lib/activate/dev_manager.h index bcfb226..3744a61 100644 --- a/lib/activate/dev_manager.h +++ b/lib/activate/dev_manager.h @@ -45,11 +45,12 @@ void dev_manager_exit(void); * (eg, an origin is created before its snapshot, but is not * unsuspended until the snapshot is also created.) */ -int dev_manager_info(struct dm_pool *mem, const struct logical_volume *lv, +int dev_manager_info(struct cmd_context *cmd, const struct logical_volume *lv, const char *layer, int with_open_count, int with_read_ahead, struct dm_info *dminfo, uint32_t *read_ahead, struct lv_seg_status *seg_status); + int dev_manager_snapshot_percent(struct dev_manager *dm, const struct logical_volume *lv, dm_percent_t *percent);
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