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-rw-r--r--fs/btrfs/volumes.c162
-rw-r--r--fs/btrfs/volumes.h1
2 files changed, 6 insertions, 157 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 647db23ad8e6..298e5885ed06 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -455,58 +455,6 @@ static noinline struct btrfs_fs_devices *find_fsid(
return NULL;
}
-/*
- * First check if the metadata_uuid is different from the fsid in the given
- * fs_devices. Then check if the given fsid is the same as the metadata_uuid
- * in the fs_devices. If it is, return true; otherwise, return false.
- */
-static inline bool check_fsid_changed(const struct btrfs_fs_devices *fs_devices,
- const u8 *fsid)
-{
- return memcmp(fs_devices->fsid, fs_devices->metadata_uuid,
- BTRFS_FSID_SIZE) != 0 &&
- memcmp(fs_devices->metadata_uuid, fsid, BTRFS_FSID_SIZE) == 0;
-}
-
-static struct btrfs_fs_devices *find_fsid_with_metadata_uuid(
- struct btrfs_super_block *disk_super)
-{
-
- struct btrfs_fs_devices *fs_devices;
-
- /*
- * Handle scanned device having completed its fsid change but
- * belonging to a fs_devices that was created by first scanning
- * a device which didn't have its fsid/metadata_uuid changed
- * at all and the CHANGING_FSID_V2 flag set.
- */
- list_for_each_entry(fs_devices, &fs_uuids, fs_list) {
- if (!fs_devices->fsid_change)
- continue;
-
- if (match_fsid_fs_devices(fs_devices, disk_super->metadata_uuid,
- fs_devices->fsid))
- return fs_devices;
- }
-
- /*
- * Handle scanned device having completed its fsid change but
- * belonging to a fs_devices that was created by a device that
- * has an outdated pair of fsid/metadata_uuid and
- * CHANGING_FSID_V2 flag set.
- */
- list_for_each_entry(fs_devices, &fs_uuids, fs_list) {
- if (!fs_devices->fsid_change)
- continue;
-
- if (check_fsid_changed(fs_devices, disk_super->metadata_uuid))
- return fs_devices;
- }
-
- return find_fsid(disk_super->fsid, disk_super->metadata_uuid);
-}
-
-
static int
btrfs_get_bdev_and_sb(const char *device_path, blk_mode_t flags, void *holder,
int flush, struct block_device **bdev,
@@ -691,84 +639,6 @@ u8 *btrfs_sb_fsid_ptr(struct btrfs_super_block *sb)
}
/*
- * Handle scanned device having its CHANGING_FSID_V2 flag set and the fs_devices
- * being created with a disk that has already completed its fsid change. Such
- * disk can belong to an fs which has its FSID changed or to one which doesn't.
- * Handle both cases here.
- */
-static struct btrfs_fs_devices *find_fsid_inprogress(
- struct btrfs_super_block *disk_super)
-{
- struct btrfs_fs_devices *fs_devices;
-
- list_for_each_entry(fs_devices, &fs_uuids, fs_list) {
- if (fs_devices->fsid_change)
- continue;
-
- if (check_fsid_changed(fs_devices, disk_super->fsid))
- return fs_devices;
- }
-
- return find_fsid(disk_super->fsid, NULL);
-}
-
-static struct btrfs_fs_devices *find_fsid_changed(
- struct btrfs_super_block *disk_super)
-{
- struct btrfs_fs_devices *fs_devices;
-
- /*
- * Handles the case where scanned device is part of an fs that had
- * multiple successful changes of FSID but currently device didn't
- * observe it. Meaning our fsid will be different than theirs. We need
- * to handle two subcases :
- * 1 - The fs still continues to have different METADATA/FSID uuids.
- * 2 - The fs is switched back to its original FSID (METADATA/FSID
- * are equal).
- */
- list_for_each_entry(fs_devices, &fs_uuids, fs_list) {
- /* Changed UUIDs */
- if (check_fsid_changed(fs_devices, disk_super->metadata_uuid) &&
- memcmp(fs_devices->fsid, disk_super->fsid,
- BTRFS_FSID_SIZE) != 0)
- return fs_devices;
-
- /* Unchanged UUIDs */
- if (memcmp(fs_devices->metadata_uuid, fs_devices->fsid,
- BTRFS_FSID_SIZE) == 0 &&
- memcmp(fs_devices->fsid, disk_super->metadata_uuid,
- BTRFS_FSID_SIZE) == 0)
- return fs_devices;
- }
-
- return NULL;
-}
-
-static struct btrfs_fs_devices *find_fsid_reverted_metadata(
- struct btrfs_super_block *disk_super)
-{
- struct btrfs_fs_devices *fs_devices;
-
- /*
- * Handle the case where the scanned device is part of an fs whose last
- * metadata UUID change reverted it to the original FSID. At the same
- * time fs_devices was first created by another constituent device
- * which didn't fully observe the operation. This results in an
- * btrfs_fs_devices created with metadata/fsid different AND
- * btrfs_fs_devices::fsid_change set AND the metadata_uuid of the
- * fs_devices equal to the FSID of the disk.
- */
- list_for_each_entry(fs_devices, &fs_uuids, fs_list) {
- if (!fs_devices->fsid_change)
- continue;
-
- if (check_fsid_changed(fs_devices, disk_super->fsid))
- return fs_devices;
- }
-
- return NULL;
-}
-/*
* Add new device to list of registered devices
*
* Returns:
@@ -788,10 +658,8 @@ static noinline struct btrfs_device *device_list_add(const char *path,
int error;
bool has_metadata_uuid = (btrfs_super_incompat_flags(disk_super) &
BTRFS_FEATURE_INCOMPAT_METADATA_UUID);
- bool fsid_change_in_progress = (btrfs_super_flags(disk_super) &
- BTRFS_SUPER_FLAG_CHANGING_FSID_V2);
- if (fsid_change_in_progress) {
+ if (btrfs_super_flags(disk_super) & BTRFS_SUPER_FLAG_CHANGING_FSID_V2) {
btrfs_err(NULL,
"device %s has incomplete metadata_uuid change, please use btrfstune to complete",
path);
@@ -805,19 +673,10 @@ static noinline struct btrfs_device *device_list_add(const char *path,
return ERR_PTR(error);
}
- if (fsid_change_in_progress) {
- if (!has_metadata_uuid)
- fs_devices = find_fsid_inprogress(disk_super);
- else
- fs_devices = find_fsid_changed(disk_super);
- } else if (has_metadata_uuid) {
- fs_devices = find_fsid_with_metadata_uuid(disk_super);
- } else {
- fs_devices = find_fsid_reverted_metadata(disk_super);
- if (!fs_devices)
- fs_devices = find_fsid(disk_super->fsid, NULL);
- }
-
+ if (has_metadata_uuid)
+ fs_devices = find_fsid(disk_super->fsid, disk_super->metadata_uuid);
+ else
+ fs_devices = find_fsid(disk_super->fsid, NULL);
if (!fs_devices) {
fs_devices = alloc_fs_devices(disk_super->fsid);
@@ -828,8 +687,6 @@ static noinline struct btrfs_device *device_list_add(const char *path,
if (IS_ERR(fs_devices))
return ERR_CAST(fs_devices);
- fs_devices->fsid_change = fsid_change_in_progress;
-
mutex_lock(&fs_devices->device_list_mutex);
list_add(&fs_devices->fs_list, &fs_uuids);
@@ -843,18 +700,11 @@ static noinline struct btrfs_device *device_list_add(const char *path,
mutex_lock(&fs_devices->device_list_mutex);
device = btrfs_find_device(fs_devices, &args);
- /*
- * If this disk has been pulled into an fs devices created by
- * a device which had the CHANGING_FSID_V2 flag then replace the
- * metadata_uuid/fsid values of the fs_devices.
- */
- if (fs_devices->fsid_change &&
- found_transid > fs_devices->latest_generation) {
+ if (found_transid > fs_devices->latest_generation) {
memcpy(fs_devices->fsid, disk_super->fsid,
BTRFS_FSID_SIZE);
memcpy(fs_devices->metadata_uuid,
btrfs_sb_fsid_ptr(disk_super), BTRFS_FSID_SIZE);
- fs_devices->fsid_change = false;
}
}
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index a0e76bb20140..e485e6a3e52c 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -362,7 +362,6 @@ struct btrfs_fs_devices {
bool rotating;
/* Devices support TRIM/discard commands. */
bool discardable;
- bool fsid_change;
/* The filesystem is a seed filesystem. */
bool seeding;
generated by cgit v1.2.3 (git 2.39.0) at 2024-08-08 03:26:49 +0300