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linux: implement filesystem-side copy/clone functions for EL7

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Redhat have backported copy_file_range and clone_file_range to the EL7
kernel using an "extended file operations" wrapper structure. This
connects all that up to let cloning work there too.

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
2023-06-25 20:50:19 +10:00
committed by Brian Behlendorf
parent 9927f219f1
commit 6b0a4be5fe
7 changed files with 90 additions and 8 deletions
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module/os/linux/zfs/zpl_file_range.c
+7 -5
View File
@@ -77,7 +77,8 @@ __zpl_clone_file_range(struct file *src_file, loff_t src_off,
return ((ssize_t)len_o);
}
#ifdef HAVE_VFS_COPY_FILE_RANGE
#if defined(HAVE_VFS_COPY_FILE_RANGE) || \
defined(HAVE_VFS_FILE_OPERATIONS_EXTEND)
/*
* Entry point for copy_file_range(). Copy len bytes from src_off in src_file
* to dst_off in dst_file. We are permitted to do this however we like, so we
@@ -94,7 +95,7 @@ zpl_copy_file_range(struct file *src_file, loff_t src_off,
return (-EINVAL);
/* Try to do it via zfs_clone_range() */
ret =__zpl_clone_file_range(src_file, src_off,
ret = __zpl_clone_file_range(src_file, src_off,
dst_file, dst_off, len);
#ifdef HAVE_VFS_GENERIC_COPY_FILE_RANGE
@@ -109,7 +110,7 @@ zpl_copy_file_range(struct file *src_file, loff_t src_off,
return (ret);
}
#endif /* HAVE_VFS_COPY_FILE_RANGE */
#endif /* HAVE_VFS_COPY_FILE_RANGE || HAVE_VFS_FILE_OPERATIONS_EXTEND */
#ifdef HAVE_VFS_REMAP_FILE_RANGE
/*
@@ -152,7 +153,8 @@ zpl_remap_file_range(struct file *src_file, loff_t src_off,
}
#endif /* HAVE_VFS_REMAP_FILE_RANGE */
#ifdef HAVE_VFS_CLONE_FILE_RANGE
#if defined(HAVE_VFS_CLONE_FILE_RANGE) || \
defined(HAVE_VFS_FILE_OPERATIONS_EXTEND)
/*
* Entry point for FICLONE and FICLONERANGE, before Linux 4.20.
*/
@@ -167,7 +169,7 @@ zpl_clone_file_range(struct file *src_file, loff_t src_off,
return (__zpl_clone_file_range(src_file, src_off,
dst_file, dst_off, len));
}
#endif /* HAVE_VFS_CLONE_FILE_RANGE */
#endif /* HAVE_VFS_CLONE_FILE_RANGE || HAVE_VFS_FILE_OPERATIONS_EXTEND */
#ifdef HAVE_VFS_DEDUPE_FILE_RANGE
/*