mirror of
https://github.com/kdave/btrfs-progs
synced 2024-12-18 04:15:32 +00:00
btrfs-progs: remove support for BTRFS_SUBVOL_CREATE_ASYNC
Kernel has removed support for this feature in 5.7 so let's remove support from progs as well. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Nikolay Borisov
David Sterba
parent
85e102f212
commit
451db51bdb
8
ioctl.h
8
ioctl.h
@ -49,15 +49,17 @@ BUILD_ASSERT(sizeof(struct btrfs_ioctl_vol_args) == 4096);
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#define BTRFS_DEVICE_PATH_NAME_MAX 1024
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#define BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0)
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/*
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* Obsolete since 5.15, functionality removed in kernel 5.7:
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* BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0)
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*/
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#define BTRFS_SUBVOL_RDONLY (1ULL << 1)
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#define BTRFS_SUBVOL_QGROUP_INHERIT (1ULL << 2)
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#define BTRFS_DEVICE_SPEC_BY_ID (1ULL << 3)
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#define BTRFS_SUBVOL_SPEC_BY_ID (1ULL << 4)
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#define BTRFS_VOL_ARG_V2_FLAGS_SUPPORTED \
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(BTRFS_SUBVOL_CREATE_ASYNC | \
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BTRFS_SUBVOL_RDONLY | \
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(BTRFS_SUBVOL_RDONLY | \
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BTRFS_SUBVOL_QGROUP_INHERIT | \
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BTRFS_DEVICE_SPEC_BY_ID | \
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BTRFS_SUBVOL_SPEC_BY_ID)
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@ -245,8 +245,7 @@ The equivalent `btrfs-progs` command is `btrfs subvolume list`.
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#### Creation
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`btrfs_util_create_subvolume()` creates a new subvolume at the given path. The
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subvolume can be created asynchronously and inherit from quota groups
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(qgroups).
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subvolume can inherit from quota groups (qgroups).
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Qgroups to inherit are specified with a `struct btrfs_util_qgroup_inherit`,
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which is created by `btrfs_util_create_qgroup_inherit()` and freed by
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@ -262,10 +261,6 @@ method and a `groups` member, which is a list of ints.
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```c
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btrfs_util_create_subvolume("/subvol2", 0, NULL, NULL);
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uint64_t async_transid;
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btrfs_util_create_subvolume("/subvol2", 0, &async_transid, NULL);
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btrfs_util_wait_sync("/", async_transid);
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struct btrfs_util_qgroup_inherit *qgroups;
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btrfs_util_create_qgroup_inherit(0, &qgroups);
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btrfs_util_qgroup_inherit_add_group(&qgroups, 256);
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@ -276,9 +271,6 @@ btrfs_util_destroy_qgroup_inherit(qgroups);
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```python
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btrfsutil.create_subvolume('/subvol2')
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async_transid = btrfsutil.create_subvolume('/subvol2', async_=True)
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btrfsutil.wait_sync('/', async_transid)
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qgroups = btrfsutil.QgroupInherit()
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qgroups.add_group(256)
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btrfsutil.create_subvolume('/subvol2', qgroup_inherit=qgroups)
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@ -292,8 +284,8 @@ The equivalent `btrfs-progs` command is `btrfs subvolume create`.
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#### Snapshotting
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Snapshots are created with `btrfs_util_create_snapshot()`, which takes a source
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path, a destination path, and flags. It can also be asynchronous and inherit
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from quota groups; see [subvolume creation](#Creation).
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path, a destination path, and flags. It can also inherit from quota groups;
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see [subvolume creation](#Creation).
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Snapshot creation can be recursive, in which case subvolumes underneath the
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subvolume being snapshotted will also be snapshotted onto the same location in
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@ -39,8 +39,7 @@ struct btrfs_ioctl_vol_args {
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#define BTRFS_SUBVOL_SPEC_BY_ID (1ULL << 4)
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#define BTRFS_VOL_ARG_V2_FLAGS_SUPPORTED \
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(BTRFS_SUBVOL_CREATE_ASYNC | \
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BTRFS_SUBVOL_RDONLY | \
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(BTRFS_SUBVOL_RDONLY | \
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BTRFS_SUBVOL_QGROUP_INHERIT | \
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BTRFS_DEVICE_SPEC_BY_ID | \
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BTRFS_SUBVOL_SPEC_BY_ID)
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@ -103,7 +102,10 @@ struct btrfs_ioctl_qgroup_limit_args {
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* - BTRFS_IOC_SUBVOL_GETFLAGS
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* - BTRFS_IOC_SUBVOL_SETFLAGS
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*/
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#define BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0)
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/*
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* Obsolete since 5.15, functionality removed in kernel 5.7:
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* BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0)
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*/
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#define BTRFS_SUBVOL_RDONLY (1ULL << 1)
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#define BTRFS_SUBVOL_QGROUP_INHERIT (1ULL << 2)
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@ -366,16 +366,13 @@ struct btrfs_util_qgroup_inherit;
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* btrfs_util_create_subvolume() - Create a new subvolume.
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* @path: Where to create the subvolume.
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* @flags: Must be zero.
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* @async_transid: If not NULL, create the subvolume asynchronously (i.e.,
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* without waiting for it to commit it to disk) and return the transaction ID
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* that it was created in. This transaction ID can be waited on with
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* btrfs_util_wait_sync().
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* @unused: No longer used (since 5.15)
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* @qgroup_inherit: Qgroups to inherit from, or NULL.
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*
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* Return: %BTRFS_UTIL_OK on success, non-zero error code on failure.
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*/
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enum btrfs_util_error btrfs_util_create_subvolume(const char *path, int flags,
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uint64_t *async_transid,
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uint64_t *unused,
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struct btrfs_util_qgroup_inherit *qgroup_inherit);
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/**
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@ -385,7 +382,7 @@ enum btrfs_util_error btrfs_util_create_subvolume(const char *path, int flags,
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* should be created.
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* @name: Name of the subvolume to create.
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* @flags: See btrfs_util_create_subvolume().
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* @async_transid: See btrfs_util_create_subvolume().
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* @unused: See btrfs_util_create_subvolume().
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* @qgroup_inherit: See btrfs_util_create_subvolume().
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*
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* Return: %BTRFS_UTIL_OK on success, non-zero error code on failure.
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@ -393,7 +390,7 @@ enum btrfs_util_error btrfs_util_create_subvolume(const char *path, int flags,
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enum btrfs_util_error btrfs_util_create_subvolume_fd(int parent_fd,
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const char *name,
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int flags,
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uint64_t *async_transid,
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uint64_t *unused,
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struct btrfs_util_qgroup_inherit *qgroup_inherit);
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/**
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@ -418,16 +415,14 @@ enum btrfs_util_error btrfs_util_create_subvolume_fd(int parent_fd,
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* @source: Path of the existing subvolume to snapshot.
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* @path: Where to create the snapshot.
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* @flags: Bitmask of BTRFS_UTIL_CREATE_SNAPSHOT_* flags.
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* @async_transid: See btrfs_util_create_subvolume(). If
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* %BTRFS_UTIL_CREATE_SNAPSHOT_RECURSIVE was in @flags, then this will contain
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* the largest transaction ID of all created subvolumes.
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* @unused: See btrfs_util_create_subvolume().
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* @qgroup_inherit: See btrfs_util_create_subvolume().
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*
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* Return: %BTRFS_UTIL_OK on success, non-zero error code on failure.
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*/
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enum btrfs_util_error btrfs_util_create_snapshot(const char *source,
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const char *path, int flags,
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uint64_t *async_transid,
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uint64_t *unused,
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struct btrfs_util_qgroup_inherit *qgroup_inherit);
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/**
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@ -435,7 +430,7 @@ enum btrfs_util_error btrfs_util_create_snapshot(const char *source,
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*/
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enum btrfs_util_error btrfs_util_create_snapshot_fd(int fd, const char *path,
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int flags,
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uint64_t *async_transid,
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uint64_t *unused,
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struct btrfs_util_qgroup_inherit *qgroup_inherit);
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/**
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@ -446,13 +441,13 @@ enum btrfs_util_error btrfs_util_create_snapshot_fd(int fd, const char *path,
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* be created.
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* @name: Name of the snapshot to create.
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* @flags: See btrfs_util_create_snapshot().
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* @async_transid: See btrfs_util_create_snapshot().
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* @unused: See btrfs_util_create_snapshot().
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* @qgroup_inherit: See btrfs_util_create_snapshot().
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*/
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enum btrfs_util_error btrfs_util_create_snapshot_fd2(int fd, int parent_fd,
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const char *name,
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int flags,
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uint64_t *async_transid,
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uint64_t *unused,
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struct btrfs_util_qgroup_inherit *qgroup_inherit);
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/**
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@ -237,8 +237,7 @@ static PyMethodDef btrfsutil_methods[] = {
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"Create a new subvolume.\n\n"
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"Arguments:\n"
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"path -- string, bytes, or path-like object\n"
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"async_ -- create the subvolume without waiting for it to commit to\n"
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"disk and return the transaction ID\n"
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"async_ -- no longer used\n"
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"qgroup_inherit -- optional QgroupInherit object of qgroups to\n"
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"inherit from"},
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{"create_snapshot", (PyCFunction)create_snapshot,
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@ -251,8 +250,7 @@ static PyMethodDef btrfsutil_methods[] = {
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"path -- string, bytes, or path-like object\n"
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"recursive -- also snapshot child subvolumes\n"
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"read_only -- create a read-only snapshot\n"
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"async_ -- create the subvolume without waiting for it to commit to\n"
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"disk and return the transaction ID\n"
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"async_ -- no longer used\n"
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"qgroup_inherit -- optional QgroupInherit object of qgroups to\n"
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"inherit from"},
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{"delete_subvolume", (PyCFunction)delete_subvolume,
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@ -245,10 +245,6 @@ class TestSubvolume(BtrfsTestCase):
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btrfsutil.create_subvolume(subvol + '6//')
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self.assertTrue(btrfsutil.is_subvolume(subvol + '6'))
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transid = btrfsutil.create_subvolume(subvol + '7', async_=True)
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self.assertTrue(btrfsutil.is_subvolume(subvol + '7'))
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self.assertGreater(transid, 0)
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# Test creating subvolumes under '/' in a chroot.
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pid = os.fork()
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if pid == 0:
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@ -308,12 +304,8 @@ class TestSubvolume(BtrfsTestCase):
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btrfsutil.create_snapshot(subvol, snapshot + '2', recursive=True)
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self.assertTrue(os.path.exists(os.path.join(snapshot + '2', 'nested/more_nested/nested_dir')))
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transid = btrfsutil.create_snapshot(subvol, snapshot + '3', recursive=True, async_=True)
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self.assertTrue(os.path.exists(os.path.join(snapshot + '3', 'nested/more_nested/nested_dir')))
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self.assertGreater(transid, 0)
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btrfsutil.create_snapshot(subvol, snapshot + '4', read_only=True)
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self.assertTrue(btrfsutil.get_subvolume_read_only(snapshot + '4'))
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btrfsutil.create_snapshot(subvol, snapshot + '3', read_only=True)
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self.assertTrue(btrfsutil.get_subvolume_read_only(snapshot + '3'))
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def test_delete_subvolume(self):
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subvol = os.path.join(self.mountpoint, 'subvol')
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@ -683,7 +683,7 @@ static enum btrfs_util_error openat_parent_and_name(int dirfd, const char *path,
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PUBLIC enum btrfs_util_error btrfs_util_create_subvolume(const char *path,
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int flags,
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uint64_t *async_transid,
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uint64_t *unused,
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struct btrfs_util_qgroup_inherit *qgroup_inherit)
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{
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char name[BTRFS_SUBVOL_NAME_MAX + 1];
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@ -696,7 +696,7 @@ PUBLIC enum btrfs_util_error btrfs_util_create_subvolume(const char *path,
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return err;
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err = btrfs_util_create_subvolume_fd(parent_fd, name, flags,
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async_transid, qgroup_inherit);
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unused, qgroup_inherit);
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SAVE_ERRNO_AND_CLOSE(parent_fd);
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return err;
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}
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@ -704,7 +704,7 @@ PUBLIC enum btrfs_util_error btrfs_util_create_subvolume(const char *path,
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PUBLIC enum btrfs_util_error btrfs_util_create_subvolume_fd(int parent_fd,
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const char *name,
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int flags,
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uint64_t *async_transid,
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uint64_t *unused,
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struct btrfs_util_qgroup_inherit *qgroup_inherit)
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{
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struct btrfs_ioctl_vol_args_v2 args = {};
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@ -716,8 +716,6 @@ PUBLIC enum btrfs_util_error btrfs_util_create_subvolume_fd(int parent_fd,
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return BTRFS_UTIL_ERROR_INVALID_ARGUMENT;
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}
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if (async_transid)
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args.flags |= BTRFS_SUBVOL_CREATE_ASYNC;
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if (qgroup_inherit) {
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args.flags |= BTRFS_SUBVOL_QGROUP_INHERIT;
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args.qgroup_inherit = (struct btrfs_qgroup_inherit *)qgroup_inherit;
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@ -738,9 +736,6 @@ PUBLIC enum btrfs_util_error btrfs_util_create_subvolume_fd(int parent_fd,
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if (ret == -1)
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return BTRFS_UTIL_ERROR_SUBVOL_CREATE_FAILED;
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if (async_transid)
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*async_transid = args.transid;
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return BTRFS_UTIL_OK;
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}
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@ -1022,8 +1017,7 @@ out_iter:
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}
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static enum btrfs_util_error snapshot_subvolume_children(int fd, int parent_fd,
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const char *name,
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uint64_t *async_transid)
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const char *name)
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{
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struct btrfs_util_subvolume_iterator *iter;
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enum btrfs_util_error err;
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@ -1041,7 +1035,6 @@ static enum btrfs_util_error snapshot_subvolume_children(int fd, int parent_fd,
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char child_name[BTRFS_SUBVOL_NAME_MAX + 1];
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char *child_path;
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int child_fd, new_parent_fd;
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uint64_t tmp_transid;
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err = btrfs_util_subvolume_iterator_next(iter, &child_path,
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NULL);
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@ -1076,14 +1069,11 @@ static enum btrfs_util_error snapshot_subvolume_children(int fd, int parent_fd,
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err = btrfs_util_create_snapshot_fd2(child_fd, new_parent_fd,
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child_name, 0,
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async_transid ? &tmp_transid : NULL,
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NULL);
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NULL, NULL);
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SAVE_ERRNO_AND_CLOSE(child_fd);
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SAVE_ERRNO_AND_CLOSE(new_parent_fd);
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if (err)
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break;
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if (async_transid && tmp_transid > *async_transid)
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*async_transid = tmp_transid;
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}
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btrfs_util_destroy_subvolume_iterator(iter);
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@ -1095,7 +1085,7 @@ out:
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PUBLIC enum btrfs_util_error btrfs_util_create_snapshot(const char *source,
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const char *path,
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int flags,
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uint64_t *async_transid,
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uint64_t *unused,
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struct btrfs_util_qgroup_inherit *qgroup_inherit)
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{
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enum btrfs_util_error err;
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@ -1105,7 +1095,7 @@ PUBLIC enum btrfs_util_error btrfs_util_create_snapshot(const char *source,
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if (fd == -1)
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return BTRFS_UTIL_ERROR_OPEN_FAILED;
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err = btrfs_util_create_snapshot_fd(fd, path, flags, async_transid,
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err = btrfs_util_create_snapshot_fd(fd, path, flags, unused,
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qgroup_inherit);
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SAVE_ERRNO_AND_CLOSE(fd);
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return err;
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@ -1114,7 +1104,7 @@ PUBLIC enum btrfs_util_error btrfs_util_create_snapshot(const char *source,
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PUBLIC enum btrfs_util_error btrfs_util_create_snapshot_fd(int fd,
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const char *path,
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int flags,
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uint64_t *async_transid,
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uint64_t *unused,
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struct btrfs_util_qgroup_inherit *qgroup_inherit)
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{
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char name[BTRFS_SUBVOL_NAME_MAX + 1];
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@ -1127,7 +1117,7 @@ PUBLIC enum btrfs_util_error btrfs_util_create_snapshot_fd(int fd,
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return err;
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err = btrfs_util_create_snapshot_fd2(fd, parent_fd, name, flags,
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async_transid, qgroup_inherit);
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unused, qgroup_inherit);
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SAVE_ERRNO_AND_CLOSE(parent_fd);
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return err;
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}
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@ -1136,7 +1126,7 @@ PUBLIC enum btrfs_util_error btrfs_util_create_snapshot_fd2(int fd,
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int parent_fd,
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const char *name,
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int flags,
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uint64_t *async_transid,
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uint64_t *unused,
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struct btrfs_util_qgroup_inherit *qgroup_inherit)
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{
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struct btrfs_ioctl_vol_args_v2 args = {.fd = fd};
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@ -1153,8 +1143,6 @@ PUBLIC enum btrfs_util_error btrfs_util_create_snapshot_fd2(int fd,
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if (flags & BTRFS_UTIL_CREATE_SNAPSHOT_READ_ONLY)
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args.flags |= BTRFS_SUBVOL_RDONLY;
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if (async_transid)
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args.flags |= BTRFS_SUBVOL_CREATE_ASYNC;
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if (qgroup_inherit) {
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args.flags |= BTRFS_SUBVOL_QGROUP_INHERIT;
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args.qgroup_inherit = (struct btrfs_qgroup_inherit *)qgroup_inherit;
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@ -1175,12 +1163,8 @@ PUBLIC enum btrfs_util_error btrfs_util_create_snapshot_fd2(int fd,
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if (ret == -1)
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return BTRFS_UTIL_ERROR_SUBVOL_CREATE_FAILED;
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if (async_transid)
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*async_transid = args.transid;
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if (flags & BTRFS_UTIL_CREATE_SNAPSHOT_RECURSIVE) {
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err = snapshot_subvolume_children(fd, parent_fd, name,
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async_transid);
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err = snapshot_subvolume_children(fd, parent_fd, name);
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if (err)
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return err;
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}
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