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https://github.com/versity/scoutfs.git
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0deb232d3f
Support O_TMPFILE: Create an unlinked file and put it on the orphan list. If it ever gains a link, take it off the orphan list. Change MOVE_BLOCKS ioctl to allow moving blocks into offline extent ranges. Ioctl callers must set a new flag to enable this operation mode. RH-compat: tmpfile support it actually backported by RH into 3.10 kernel. We need to use some of their kabi-maintaining wrappers to use it: use a struct inode_operations_wrapper instead of base struct inode_operations, set S_IOPS_WRAPPER flag in i_flags. This lets RH's modified vfs_tmpfile() find our tmpfile fn pointer. Add a test that tests both creating tmpfiles as well as moving their contents into a destination file via MOVE_BLOCKS. xfstests common/004 now runs because tmpfile is supported. Signed-off-by: Andy Grover <agrover@versity.com>
37 lines
1.3 KiB
C
37 lines
1.3 KiB
C
#ifndef _SCOUTFS_EXT_H_
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#define _SCOUTFS_EXT_H_
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struct scoutfs_extent {
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u64 start;
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u64 len;
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u64 map;
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u8 flags;
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};
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struct scoutfs_ext_ops {
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int (*next)(struct super_block *sb, void *arg,
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u64 start, u64 len, struct scoutfs_extent *ext);
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int (*insert)(struct super_block *sb, void *arg,
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u64 start, u64 len, u64 map, u8 flags);
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int (*remove)(struct super_block *sb, void *arg, u64 start, u64 len,
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u64 map, u8 flags);
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};
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bool scoutfs_ext_can_merge(struct scoutfs_extent *left,
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struct scoutfs_extent *right);
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int scoutfs_ext_next(struct super_block *sb, struct scoutfs_ext_ops *ops,
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void *arg, u64 start, u64 len, struct scoutfs_extent *ext);
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int scoutfs_ext_insert(struct super_block *sb, struct scoutfs_ext_ops *ops,
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void *arg, u64 start, u64 len, u64 map, u8 flags);
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int scoutfs_ext_remove(struct super_block *sb, struct scoutfs_ext_ops *ops,
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void *arg, u64 start, u64 len);
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int scoutfs_ext_alloc(struct super_block *sb, struct scoutfs_ext_ops *ops,
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void *arg, u64 start, u64 len, u64 limit,
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struct scoutfs_extent *ext);
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int scoutfs_ext_set(struct super_block *sb, struct scoutfs_ext_ops *ops,
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void *arg, u64 start, u64 len, u64 map, u8 flags);
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bool scoutfs_ext_inside(u64 start, u64 len, struct scoutfs_extent *out);
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#endif
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