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linux: implement filesystem-side copy/clone functions

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This implements the Linux VFS ops required to service the file
copy/clone APIs:

  .copy_file_range    (4.5+)
  .clone_file_range   (4.5-4.19)
  .dedupe_file_range  (4.5-4.19)
  .remap_file_range   (4.20+)

Note that dedupe_file_range() and remap_file_range(REMAP_FILE_DEDUP) are
hooked up here, but are not implemented yet.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Kay Pedersen <mail@mkwg.de>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Sponsored-By: OpenDrives Inc.
Sponsored-By: Klara Inc.
Closes #15050
This commit is contained in:
Rob Norris
2023-06-27 23:44:53 +10:00
committed by Brian Behlendorf
parent f6facd2429
commit 5a35c68b67
6 changed files with 384 additions and 1 deletions
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include/os/linux/zfs/sys/zpl.h
+14
View File
@@ -180,6 +180,20 @@ zpl_dir_emit_dots(struct file *file, zpl_dir_context_t *ctx)
}
#endif /* HAVE_VFS_ITERATE */
/* zpl_file_range.c */
/* handlers for file_operations of the same name */
extern ssize_t zpl_copy_file_range(struct file *src_file, loff_t src_off,
struct file *dst_file, loff_t dst_off, size_t len, unsigned int flags);
extern loff_t zpl_remap_file_range(struct file *src_file, loff_t src_off,
struct file *dst_file, loff_t dst_off, loff_t len, unsigned int flags);
extern int zpl_clone_file_range(struct file *src_file, loff_t src_off,
struct file *dst_file, loff_t dst_off, uint64_t len);
extern int zpl_dedupe_file_range(struct file *src_file, loff_t src_off,
struct file *dst_file, loff_t dst_off, uint64_t len);
#if defined(HAVE_INODE_TIMESTAMP_TRUNCATE)
#define zpl_inode_timestamp_truncate(ts, ip) timestamp_truncate(ts, ip)
#elif defined(HAVE_INODE_TIMESPEC64_TIMES)