Pull misc vfs updates from Christian Brauner: "Features: - Support caching symlink lengths in inodes The size is stored in a new union utilizing the same space as i_devices, thus avoiding growing the struct or taking up any more space When utilized it dodges strlen() in vfs_readlink(), giving about 1.5% speed up when issuing readlink on /initrd.img on ext4 - Add RWF_DONTCACHE iocb and FOP_DONTCACHE file_operations flag If a file system supports uncached buffered IO, it may set FOP_DONTCACHE and enable support for RWF_DONTCACHE. If RWF_DONTCACHE is attempted without the file system supporting it, it'll get errored with -EOPNOTSUPP - Enable VBOXGUEST and VBOXSF_FS on ARM64 Now that VirtualBox is able to run as a host on arm64 (e.g. the Apple M3 processors) we can enable VBOXSF_FS (and in turn VBOXGUEST) for this architecture. Tested with various runs of bonnie++ and dbench on an Apple MacBook Pro with the latest Virtualbox 7.1.4 r165100 installed Cleanups: - Delay sysctl_nr_open check in expand_files() - Use kernel-doc includes in fiemap docbook - Use page->private instead of page->index in watch_queue - Use a consume fence in mnt_idmap() as it's heavily used in link_path_walk() - Replace magic number 7 with ARRAY_SIZE() in fc_log - Sort out a stale comment about races between fd alloc and dup2() - Fix return type of do_mount() from long to int - Various cosmetic cleanups for the lockref code Fixes: - Annotate spinning as unlikely() in __read_seqcount_begin The annotation already used to be there, but got lost in commit 52ac39e5db51 ("seqlock: seqcount_t: Implement all read APIs as statement expressions") - Fix proc_handler for sysctl_nr_open - Flush delayed work in delayed fput() - Fix grammar and spelling in propagate_umount() - Fix ESP not readable during coredump In /proc/PID/stat, there is the kstkesp field which is the stack pointer of a thread. While the thread is active, this field reads zero. But during a coredump, it should have a valid value However, at the moment, kstkesp is zero even during coredump - Don't wake up the writer if the pipe is still full - Fix unbalanced user_access_end() in select code" * tag 'vfs-6.14-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (28 commits) gfs2: use lockref_init for qd_lockref erofs: use lockref_init for pcl->lockref dcache: use lockref_init for d_lockref lockref: add a lockref_init helper lockref: drop superfluous externs lockref: use bool for false/true returns lockref: improve the lockref_get_not_zero description lockref: remove lockref_put_not_zero fs: Fix return type of do_mount() from long to int select: Fix unbalanced user_access_end() vbox: Enable VBOXGUEST and VBOXSF_FS on ARM64 pipe_read: don't wake up the writer if the pipe is still full selftests: coredump: Add stackdump test fs/proc: do_task_stat: Fix ESP not readable during coredump fs: add RWF_DONTCACHE iocb and FOP_DONTCACHE file_operations flag fs: sort out a stale comment about races between fd alloc and dup2 fs: Fix grammar and spelling in propagate_umount() fs: fc_log replace magic number 7 with ARRAY_SIZE() fs: use a consume fence in mnt_idmap() file: flush delayed work in delayed fput() ...
Showing the changes to include/uapi (2 of 33 files). Show all
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| @@ -14,37 +14,56 @@ · 13 unmodified lines | ||
| 14 | 14 | |
| 15 | 15 | #include <linux/types.h> |
| 16 | 16 | |
| 17 | +/** | |
| 18 | + * struct fiemap_extent - description of one fiemap extent | |
| 19 | + * @fe_logical: byte offset of the extent in the file | |
| 20 | + * @fe_physical: byte offset of extent on disk | |
| 21 | + * @fe_length: length in bytes for this extent | |
| 22 | + * @fe_flags: FIEMAP_EXTENT_* flags for this extent | |
| 23 | + */ | |
| 17 | 24 | struct fiemap_extent { |
| 18 | − __u64 fe_logical; /* logical offset in bytes for the start of | |
| 19 | − * the extent from the beginning of the file */ | |
| 20 | − __u64 fe_physical; /* physical offset in bytes for the start | |
| 21 | − * of the extent from the beginning of the disk */ | |
| 22 | − __u64 fe_length; /* length in bytes for this extent */ | |
| 25 | + __u64 fe_logical; | |
| 26 | + __u64 fe_physical; | |
| 27 | + __u64 fe_length; | |
| 28 | + /* private: */ | |
| 23 | 29 | __u64 fe_reserved64[2]; |
| 24 | − __u32 fe_flags; /* FIEMAP_EXTENT_* flags for this extent */ | |
| 30 | + /* public: */ | |
| 31 | + __u32 fe_flags; | |
| 32 | + /* private: */ | |
| 25 | 33 | __u32 fe_reserved[3]; |
| 26 | 34 | }; |
| 27 | 35 | |
| 36 | +/** | |
| 37 | + * struct fiemap - file extent mappings | |
| 38 | + * @fm_start: byte offset (inclusive) at which to start mapping (in) | |
| 39 | + * @fm_length: logical length of mapping which userspace wants (in) | |
| 40 | + * @fm_flags: FIEMAP_FLAG_* flags for request (in/out) | |
| 41 | + * @fm_mapped_extents: number of extents that were mapped (out) | |
| 42 | + * @fm_extent_count: size of fm_extents array (in) | |
| 43 | + * @fm_extents: array of mapped extents (out) | |
| 44 | + */ | |
| 28 | 45 | struct fiemap { |
| 29 | − __u64 fm_start; /* logical offset (inclusive) at | |
| 30 | − * which to start mapping (in) */ | |
| 31 | − __u64 fm_length; /* logical length of mapping which | |
| 32 | − * userspace wants (in) */ | |
| 33 | − __u32 fm_flags; /* FIEMAP_FLAG_* flags for request (in/out) */ | |
| 34 | − __u32 fm_mapped_extents;/* number of extents that were mapped (out) */ | |
| 35 | − __u32 fm_extent_count; /* size of fm_extents array (in) */ | |
| 46 | + __u64 fm_start; | |
| 47 | + __u64 fm_length; | |
| 48 | + __u32 fm_flags; | |
| 49 | + __u32 fm_mapped_extents; | |
| 50 | + __u32 fm_extent_count; | |
| 51 | + /* private: */ | |
| 36 | 52 | __u32 fm_reserved; |
| 37 | − struct fiemap_extent fm_extents[]; /* array of mapped extents (out) */ | |
| 53 | + /* public: */ | |
| 54 | + struct fiemap_extent fm_extents[]; | |
| 38 | 55 | }; |
| 39 | 56 | |
| 40 | 57 | #define FIEMAP_MAX_OFFSET (~0ULL) |
| 41 | 58 | |
| 59 | +/* flags used in fm_flags: */ | |
| 42 | 60 | #define FIEMAP_FLAG_SYNC 0x00000001 /* sync file data before map */ |
| 43 | 61 | #define FIEMAP_FLAG_XATTR 0x00000002 /* map extended attribute tree */ |
| 44 | 62 | #define FIEMAP_FLAG_CACHE 0x00000004 /* request caching of the extents */ |
| 45 | 63 | |
| 46 | 64 | #define FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR) |
| 47 | 65 | |
| 66 | +/* flags used in fe_flags: */ | |
| 48 | 67 | #define FIEMAP_EXTENT_LAST 0x00000001 /* Last extent in file. */ |
| 49 | 68 | #define FIEMAP_EXTENT_UNKNOWN 0x00000002 /* Data location unknown. */ |
| 50 | 69 | #define FIEMAP_EXTENT_DELALLOC 0x00000004 /* Location still pending. |
| @@ -332,9 +332,13 @@ typedef int __bitwise __kernel_rwf_t; · 331 unmodified lines | ||
| 332 | 332 | /* Atomic Write */ |
| 333 | 333 | #define RWF_ATOMIC ((__force __kernel_rwf_t)0x00000040) |
| 334 | 334 | |
| 335 | +/* buffered IO that drops the cache after reading or writing data */ | |
| 336 | +#define RWF_DONTCACHE ((__force __kernel_rwf_t)0x00000080) | |
| 337 | + | |
| 335 | 338 | /* mask of flags supported by the kernel */ |
| 336 | 339 | #define RWF_SUPPORTED (RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT |\ |
| 337 | − RWF_APPEND | RWF_NOAPPEND | RWF_ATOMIC) | |
| 340 | + RWF_APPEND | RWF_NOAPPEND | RWF_ATOMIC |\ | |
| 341 | + RWF_DONTCACHE) | |
| 338 | 342 | |
| 339 | 343 | #define PROCFS_IOCTL_MAGIC 'f' |
| 340 | 344 | |