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| author |   Naohiro Aota <naohiro.aota@wdc.com> | 2021-02-04 19:21:41 +0900 |
|---|---|---|
| committer |   David Sterba <dsterba@suse.com> | 2021-02-09 00:52:19 +0100 |
| commit | c3b0e880bbfafab6beed92b1ee6db2cdaf4bc54c (patch) | |
| tree | fbcaa3845b00376fada539356d4bf43328d1ac3c /include/linux/iomap.h | |
| parent | block: add bio_add_zone_append_page (diff) | |
| download | linux-dev-c3b0e880bbfafab6beed92b1ee6db2cdaf4bc54c.tar.xz linux-dev-c3b0e880bbfafab6beed92b1ee6db2cdaf4bc54c.zip | |
iomap: support REQ_OP_ZONE_APPEND
A ZONE_APPEND bio must follow hardware restrictions (e.g. not exceeding
max_zone_append_sectors) not to be split. bio_iov_iter_get_pages builds
such restricted bio using __bio_iov_append_get_pages if bio_op(bio) ==
REQ_OP_ZONE_APPEND.
To utilize it, we need to set the bio_op before calling
bio_iov_iter_get_pages(). This commit introduces IOMAP_F_ZONE_APPEND, so
that iomap user can set the flag to indicate they want REQ_OP_ZONE_APPEND
and restricted bio.
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'include/linux/iomap.h')
| -rw-r--r-- | include/linux/iomap.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/iomap.h b/include/linux/iomap.h index 5bd3cac4df9c..8ebb1fa6f3b7 100644 --- a/include/linux/iomap.h +++ b/include/linux/iomap.h @@ -55,6 +55,7 @@ struct vm_fault; #define IOMAP_F_SHARED 0x04 #define IOMAP_F_MERGED 0x08 #define IOMAP_F_BUFFER_HEAD 0x10 +#define IOMAP_F_ZONE_APPEND 0x20 /* * Flags set by the core iomap code during operations: |