Lukas Czerner bbc605cdb1 ext4: implement support for get/set fs label ... Implement support for FS_IOC_GETFSLABEL and FS_IOC_SETFSLABEL ioctls for online reading and setting of file system label. ext4_ioctl_getlabel() is simple, just get the label from the primary superblock. This might not be the first sb on the file system if 'sb=' mount option is used. In ext4_ioctl_setlabel() we update what ext4 currently views as a primary superblock and then proceed to update backup superblocks. There are two caveats: - the primary superblock might not be the first superblock and so it might not be the one used by userspace tools if read directly off the disk. - because the primary superblock might not be the first superblock we potentialy have to update it as part of backup superblock update. However the first sb location is a bit more complicated than the rest so we have to account for that. The superblock modification is created generic enough so the infrastructure can be used for other potential superblock modification operations, such as chaning UUID. Tested with generic/492 with various configurations. I also checked the behavior with 'sb=' mount options, including very large file systems with and without sparse_super/sparse_super2. Signed-off-by: Lukas Czerner <lczerner@redhat.com> Link: https://lore.kernel.org/r/20211213135618.43303-1-lczerner@redhat.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>		2022-01-10 13:25:55 -05:00
..
9p.h
afs.h	netfs, 9p, afs, ceph: Use folios	2021-11-10 21:16:56 +00:00
alarmtimer.h
asoc.h	ASoC: soc-core: tidyup jack.h	2020-11-30 12:54:01 +00:00
avc.h
bcache.h	block: remove superfluous param in blk_fill_rwbs()	2021-02-22 06:37:41 -07:00
block.h	block: don't call blk_status_to_errno in blk_update_request	2021-10-19 05:54:57 -06:00
bpf_test_run.h
bridge.h
btrfs.h	btrfs: use delalloc_bytes to determine flush amount for shrink_delalloc	2021-08-23 13:19:07 +02:00
cachefiles.h	cachefiles: Fix oops with cachefiles_cull() due to NULL object	2021-10-05 11:22:06 +01:00
cgroup.h
clk.h	clk: Trace clk_set_rate() "range" functions	2020-12-17 01:54:31 -08:00
cma.h	mm, tracing: unify PFN format strings	2021-06-29 10:53:52 -07:00
compaction.h
context_tracking.h
cpuhp.h
damon.h	mm/damon: add a tracepoint	2021-09-08 11:50:24 -07:00
devfreq.h	PM / devfreq: Add tracepoint for frequency changes	2020-10-26 10:52:37 +09:00
devlink.h	devlink: Reduce struct devlink exposure	2021-10-12 16:29:16 -07:00
dma_fence.h	treewide: Add missing semicolons to __assign_str uses	2021-06-30 09:19:14 -04:00
erofs.h	erofs: get compression algorithms directly on mapping	2021-10-18 00:15:55 +08:00
error_report.h	tracing: add error_report_end trace point	2021-02-26 09:41:02 -08:00
ext4.h	ext4: implement support for get/set fs label	2022-01-10 13:25:55 -05:00
f2fs.h	f2fs: multidevice: support direct IO	2021-10-26 14:04:30 -07:00
fib.h
fib6.h
filelock.h
filemap.h	mm, tracing: unify PFN format strings	2021-06-29 10:53:52 -07:00
fs_dax.h
fs.h	NFS: Move generic FS show macros to global header	2021-11-02 12:31:23 -04:00
fscache.h	fscache: Use refcount_t for the cookie refcount instead of atomic_t	2021-08-27 13:34:03 +01:00
fsi_master_aspeed.h
fsi_master_ast_cf.h
fsi_master_gpio.h
fsi.h
gpio.h
gpu_mem.h
host1x.h
huge_memory.h
hwmon.h
i2c.h
ib_mad.h
ib_umad.h
initcall.h
intel_iommu.h	iommu/vt-d: Add prq_report trace event	2021-06-10 09:06:13 +02:00
intel_ish.h
intel-sst.h
io_uring.h	io_uring: dump sqe contents if issue fails	2021-10-19 05:49:52 -06:00
iocost.h	blk-iocost: Add iocg idle state tracepoint	2020-12-17 07:55:44 -07:00
iommu.h
ipi.h
irq_matrix.h
irq.h
iscsi.h
jbd2.h	jbd2,ext4: add a shrinker to release checkpointed buffers	2021-06-24 10:54:49 -04:00
kmem.h	mm, tracing: unify PFN format strings	2021-06-29 10:53:52 -07:00
kvm.h	KVM: x86/mmu: Drop trace_kvm_age_page() tracepoint	2021-04-17 08:30:56 -04:00
kyber.h	kyber: avoid q->disk dereferences in trace points	2021-10-15 21:02:57 -06:00
libata.h
lock.h
mce.h
mctp.h	mctp: Add tracepoints for tag/key handling	2021-09-29 11:00:11 +01:00
mdio.h
migrate.h	mm/migrate: demote pages during reclaim	2021-09-03 09:58:16 -07:00
mlxsw.h
mmap_lock.h	mm: mmap_lock: use DECLARE_EVENT_CLASS and DEFINE_EVENT_FN	2021-11-06 13:30:36 -07:00
mmap.h
mmc.h
mmflags.h	Merge branch 'akpm' (patches from Andrew)	2021-09-08 12:55:35 -07:00
module.h
mptcp.h	mptcp: dump csum fields in mptcp_dump_mpext	2021-06-18 11:40:11 -07:00
napi.h
nbd.h
neigh.h
net_probe_common.h
net.h	net: use %px to print skb address in trace_netif_receive_skb	2021-07-15 10:28:48 -07:00
netfs.h	netfs: Move cookie debug ID to struct netfs_cache_resources	2021-08-25 15:20:25 +01:00
netlink.h	netlink: add tracepoint at NL_SET_ERR_MSG	2021-02-04 18:05:59 -08:00
nfs.h	NFS: Move NFS protocol display macros to global header	2021-11-02 12:31:23 -04:00
nilfs2.h
nmi.h
objagg.h
oom.h
osnoise.h	tracing: Fix spelling in osnoise tracer "interferences" -> "interference"	2021-06-28 14:12:27 -04:00
page_isolation.h
page_pool.h	mm, tracing: unify PFN format strings	2021-06-29 10:53:52 -07:00
page_ref.h	mm: introduce PAGEFLAGS_MASK to replace ((1UL << NR_PAGEFLAGS) - 1)	2021-09-08 11:50:24 -07:00
pagemap.h	mm/lru: Convert __pagevec_lru_add_fn to take a folio	2021-10-18 07:49:40 -04:00
percpu.h
power_cpu_migrate.h
power.h
preemptirq.h
printk.h
pwc.h
pwm.h
qdisc.h	qdisc: add new field for qdisc_enqueue tracepoint	2021-07-27 14:16:38 +01:00
qla.h
qrtr.h
random.h	random: remove dead code left over from blocking pool	2021-04-02 18:28:12 +11:00
rcu.h	rcu/nocb: Unify timers	2021-05-12 12:10:23 -07:00
rdma_core.h
rdma.h
regulator.h
rpcgss.h	sunrpc: fix header include guard in trace header	2021-11-17 18:27:32 -05:00
rpcrdma.h	A slow cycle for nfsd: mainly cleanup, including Neil's patch dropping	2021-11-10 16:45:54 -08:00
rpm.h
rseq.h
rtc.h
rxrpc.h
sched.h	sched/tracing: Remove the redundant 'success' in the sched tracepoint	2021-06-10 11:16:20 -04:00
scmi.h
scsi.h	scsi: core: Kill message byte	2021-05-31 22:48:24 -04:00
sctp.h
signal.h
siox.h
skb.h
smbus.h
sock.h	net: sock: add trace for socket errors	2021-06-29 11:28:21 -07:00
spi.h	spi: Enable tracing of the SPI setup CS selection	2021-05-26 21:22:13 +01:00
spmi.h
sunrpc_base.h	SUNRPC: Tracepoints should display tk_pid and cl_clid as a fixed-size field	2021-10-20 18:09:54 -04:00
sunrpc.h	A slow cycle for nfsd: mainly cleanup, including Neil's patch dropping	2021-11-10 16:45:54 -08:00
sunvnet.h
swiotlb.h
syscalls.h
target.h
task.h
tcp.h	tcp: add tracepoint for checksum errors	2021-05-14 15:26:03 -07:00
tegra_apb_dma.h
thermal_power_allocator.h
thermal.h	thermal: devfreq_cooling: change tracing function and arguments	2020-12-11 14:10:44 +01:00
thp.h
timer.h	tracing: Fix various typos in comments	2021-03-23 14:08:18 -04:00
tlb.h
udp.h
ufs.h	scsi: ufs: core: Enable power management for wlun	2021-05-10 22:28:20 -04:00
v4l2.h
vb2.h
vmscan.h	mm/vmscan: throttle reclaim when no progress is being made	2021-11-06 13:30:40 -07:00
vsock_virtio_transport_common.h	virtio/vsock: update trace event for SEQPACKET	2021-06-11 13:32:47 -07:00
wbt.h
workqueue.h	workqueue/tracing: Copy workqueue name to buffer in trace event	2021-03-18 12:57:37 -04:00
writeback.h	Merge branch 'akpm' (patches from Andrew)	2021-11-06 14:08:17 -07:00
xdp.h	xdp: Extend xdp_redirect_map with broadcast support	2021-05-26 09:46:16 +02:00
xen.h	x86/mm/tlb: Flush remote and local TLBs concurrently	2021-03-06 12:59:10 +01:00