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authorBoaz Harrosh <bharrosh@panasas.com>2010-11-16 20:09:58 +0200
committerBoaz Harrosh <bharrosh@panasas.com>2011-08-06 19:35:31 -0700
commite1042ba0991aab80ced34f7dade6ec25f22b4304 (patch)
tree5953383f9235df91acfc2315a5c6fbdfb359ecf1 /fs/exofs/exofs.h
parent16f75bb35d54b44356f496272c013f7ace5fa698 (diff)
exofs: Add offset/length to exofs_get_io_state
In future raid code we will need to know the IO offset/length and if it's a read or write to determine some of the array sizes we'll need. So add a new exofs_get_rw_state() API for use when writeing/reading. All other simple cases are left using the old way. The major change to this is that now we need to call exofs_get_io_state later at inode.c::read_exec and inode.c::write_exec when we actually know these things. So this patch is kept separate so I can test things apart from other changes. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Diffstat (limited to 'fs/exofs/exofs.h')
-rw-r--r--fs/exofs/exofs.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/exofs/exofs.h b/fs/exofs/exofs.h
index 9f62349a5a5c..fd913ddfd48b 100644
--- a/fs/exofs/exofs.h
+++ b/fs/exofs/exofs.h
@@ -109,7 +109,7 @@ static inline osd_id exofs_oi_objno(struct exofs_i_info *oi)
}
struct exofs_io_state;
-typedef void (*exofs_io_done_fn)(struct exofs_io_state *or, void *private);
+typedef void (*exofs_io_done_fn)(struct exofs_io_state *ios, void *private);
struct exofs_io_state {
struct kref kref;
@@ -137,6 +137,8 @@ struct exofs_io_state {
unsigned out_attr_len;
struct osd_attr *out_attr;
+ bool reading;
+
/* Variable array of size numdevs */
unsigned numdevs;
struct exofs_per_dev_state {
@@ -218,6 +220,8 @@ void exofs_make_credential(u8 cred_a[OSD_CAP_LEN],
int exofs_read_kern(struct osd_dev *od, u8 *cred, struct osd_obj_id *obj,
u64 offset, void *p, unsigned length);
+int exofs_get_rw_state(struct exofs_layout *layout, bool is_reading,
+ u64 offset, u64 length, struct exofs_io_state **ios);
int exofs_get_io_state(struct exofs_layout *layout,
struct exofs_io_state **ios);
void exofs_put_io_state(struct exofs_io_state *ios);