[Ocfs2-devel] [PATCH 19/30] ocfs2: Handle missing iop->fallocate()
Joel Becker
Joel.Becker at oracle.com
Fri Dec 21 15:11:29 PST 2007
On Thu, Dec 20, 2007 at 03:29:36PM -0800, Sunil Mushran wrote:
> Commit 97ac73506c0ba93f30239bb57b4cfc5d73e68a62 in mainline introduces a
> new iop, fallocate(). This patch allows one to build ocfs2 with kernels
> having/not having this change.
Test is reversed (should be #ifndef NO_FALLOCATE). I'm trying to think
how we could move the #ifdef to a kapi-compat file, but I'm not coming
up with anything.
Joel
> Signed-off-by: Sunil Mushran <sunil.mushran at oracle.com>
> ---
> Config.make.in | 1 +
> configure.in | 5 +++++
> fs/ocfs2/Makefile | 4 ++++
> fs/ocfs2/file.c | 6 ++++++
> 4 files changed, 16 insertions(+), 0 deletions(-)
>
> diff --git a/Config.make.in b/Config.make.in
> index a27e274..3818cd5 100644
> --- a/Config.make.in
> +++ b/Config.make.in
> @@ -65,6 +65,7 @@ KMEM_CACHE_CREATE_DTOR = @KMEM_CACHE_CREATE_DTOR@
> REGISTER_SYSCTL_TWO_ARGS = @REGISTER_SYSCTL_TWO_ARGS@
> SU_MUTEX_DEFINED = @SU_MUTEX_DEFINED@
> STRUCT_SUBSYSTEM_DEFINED = @STRUCT_SUBSYSTEM_DEFINED@
> +FALLOCATE_DEFINED = @FALLOCATE_DEFINED@
>
> OCFS_DEBUG = @OCFS_DEBUG@
>
> diff --git a/configure.in b/configure.in
> index f8b5f20..74337ee 100644
> --- a/configure.in
> +++ b/configure.in
> @@ -242,6 +242,11 @@ OCFS2_CHECK_KERNEL([is_owner_or_cap() in fs.h], fs.h,
> , cap_compat_header="cap.h", [^#define is_owner_or_cap])
> KAPI_COMPAT_HEADERS="$KAPI_COMPAT_HEADERS $cap_compat_header"
>
> +FALLOCATE_DEFINED=
> +OCFS2_CHECK_KERNEL([fallocate() in fs.h], fs.h,
> + FALLOCATE_DEFINED=yes, , [^.*long (\*fallocate)])
> +AC_SUBST(FALLOCATE_DEFINED)
> +
> # using -include has two advantages:
> # the source doesn't need to know to include compat headers
> # the compat header file names don't go through the search path
> diff --git a/fs/ocfs2/Makefile b/fs/ocfs2/Makefile
> index 5c290b7..6f21960 100644
> --- a/fs/ocfs2/Makefile
> +++ b/fs/ocfs2/Makefile
> @@ -45,6 +45,10 @@ ifdef STRUCT_SUBSYSTEM_DEFINED
> EXTRA_CFLAGS += -DSTRUCT_SUBSYSTEM_DEFINED
> endif
>
> +ifdef FALLOCATE_DEFINED
> +EXTRA_CFLAGS += -DFALLOCATE_DEFINED
> +endif
> +
> #
> # Since SUBDIRS means something to kbuild, define them safely. Do not
> # include trailing slashes.
> diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
> index adb10b9..ce18447 100644
> --- a/fs/ocfs2/file.c
> +++ b/fs/ocfs2/file.c
> @@ -34,7 +34,9 @@
> #include <linux/splice.h>
> #include <linux/mount.h>
> #include <linux/writeback.h>
> +#ifdef FALLOCATE_DEFINED
> #include <linux/falloc.h>
> +#endif
>
> #define MLOG_MASK_PREFIX ML_INODE
> #include <cluster/masklog.h>
> @@ -1749,6 +1751,7 @@ int ocfs2_change_file_space(struct file *file, unsigned int cmd,
> return __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0);
> }
>
> +#ifdef FALLOCATE_DEFINED
> static long ocfs2_fallocate(struct inode *inode, int mode, loff_t offset,
> loff_t len)
> {
> @@ -1772,6 +1775,7 @@ static long ocfs2_fallocate(struct inode *inode, int mode, loff_t offset,
> return __ocfs2_change_file_space(NULL, inode, offset,
> OCFS2_IOC_RESVSP64, &sr, change_size);
> }
> +#endif
>
> static int ocfs2_prepare_inode_for_write(struct dentry *dentry,
> loff_t *ppos,
> @@ -2397,7 +2401,9 @@ const struct inode_operations ocfs2_file_iops = {
> .setattr = ocfs2_setattr,
> .getattr = ocfs2_getattr,
> .permission = ocfs2_permission,
> +#ifdef FALLOCATE_DEFINED
> .fallocate = ocfs2_fallocate,
> +#endif
> };
>
> const struct inode_operations ocfs2_special_file_iops = {
> --
> 1.5.2.5
>
>
> _______________________________________________
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> Ocfs2-devel at oss.oracle.com
> http://oss.oracle.com/mailman/listinfo/ocfs2-devel
--
Life's Little Instruction Book #80
"Slow dance"
Joel Becker
Principal Software Developer
Oracle
E-mail: joel.becker at oracle.com
Phone: (650) 506-8127
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