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Expose additional file level attributes

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ZFS allows to update and retrieve additional file level attributes for
FreeBSD. This commit allows additional file level attributes to be
updated and retrieved for Linux. These include the flags stored in the
upper half of z_pflags only.

Two new IOCTLs have been added for this purpose. ZFS_IOC_GETDOSFLAGS
can be used to retrieve the attributes, while ZFS_IOC_SETDOSFLAGS can
be used to update the attributes.

Attributes that are allowed to be updated include ZFS_IMMUTABLE,
ZFS_APPENDONLY, ZFS_NOUNLINK, ZFS_ARCHIVE, ZFS_NODUMP, ZFS_SYSTEM,
ZFS_HIDDEN, ZFS_READONLY, ZFS_REPARSE, ZFS_OFFLINE and ZFS_SPARSE.
Flags can be or'd together while calling ZFS_IOC_SETDOSFLAGS.

Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Umer Saleem <usaleem@ixsystems.com>
Closes #13118
This commit is contained in:
Umer Saleem
2022-03-08 06:52:03 +05:00
committed by GitHub
parent 9955b9ba2e
commit 39a4daf742
24 changed files with 804 additions and 62 deletions
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include/sys/fs/zfs.h
+35
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@@ -1459,6 +1459,41 @@ typedef enum zfs_ioc {
*/
#define BLKZNAME _IOR(0x12, 125, char[ZFS_MAX_DATASET_NAME_LEN])
#ifdef __linux__
/*
* IOCTLs to update and retrieve additional file level attributes on
* Linux.
*/
#define ZFS_IOC_GETDOSFLAGS _IOR(0x83, 1, uint64_t)
#define ZFS_IOC_SETDOSFLAGS _IOW(0x83, 2, uint64_t)
/*
* Additional file level attributes, that are stored
* in the upper half of z_pflags
*/
#define ZFS_READONLY 0x0000000100000000ull
#define ZFS_HIDDEN 0x0000000200000000ull
#define ZFS_SYSTEM 0x0000000400000000ull
#define ZFS_ARCHIVE 0x0000000800000000ull
#define ZFS_IMMUTABLE 0x0000001000000000ull
#define ZFS_NOUNLINK 0x0000002000000000ull
#define ZFS_APPENDONLY 0x0000004000000000ull
#define ZFS_NODUMP 0x0000008000000000ull
#define ZFS_OPAQUE 0x0000010000000000ull
#define ZFS_AV_QUARANTINED 0x0000020000000000ull
#define ZFS_AV_MODIFIED 0x0000040000000000ull
#define ZFS_REPARSE 0x0000080000000000ull
#define ZFS_OFFLINE 0x0000100000000000ull
#define ZFS_SPARSE 0x0000200000000000ull
#define ZFS_DOS_FL_USER_VISIBLE (ZFS_IMMUTABLE | ZFS_APPENDONLY | \
ZFS_NOUNLINK | ZFS_ARCHIVE | ZFS_NODUMP | ZFS_SYSTEM | \
ZFS_HIDDEN | ZFS_READONLY | ZFS_REPARSE | ZFS_OFFLINE | \
ZFS_SPARSE)
#endif
/*
* ZFS-specific error codes used for returning descriptive errors
* to the userland through zfs ioctls.