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| author | Bob Peterson <rpeterso@redhat.com> | 2012-06-06 14:17:59 +0400 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2012-06-06 14:17:59 +0400 |
| commit | 0a305e496059a113f93bdd3ad27a5aaa917fe34d (patch) | |
| tree | b0b6ce3997fef4c4e28f598a98e2e08c939414a6 /fs/gfs2/rgrp.h | |
| parent | eea5b5510fc5545d15b69da8e485a7424ae388cf (diff) | |
| download | linux-0a305e496059a113f93bdd3ad27a5aaa917fe34d.tar.xz | |
GFS2: Extend the life of the reservations
This patch lengthens the lifespan of the reservations structure for
inodes. Before, they were allocated and deallocated for every write
operation. With this patch, they are allocated when the first write
occurs, and deallocated when the last process closes the file.
It's more efficient to do it this way because it saves GFS2 a lot of
unnecessary allocates and frees. It also gives us more flexibility
for the future: (1) we can now fold the qadata structure back into
the structure and save those alloc/frees, (2) we can use this for
multi-block reservations.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/rgrp.h')
| -rw-r--r-- | fs/gfs2/rgrp.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/gfs2/rgrp.h b/fs/gfs2/rgrp.h index b4b10f4de25f..d9eda5f9ef2a 100644 --- a/fs/gfs2/rgrp.h +++ b/fs/gfs2/rgrp.h @@ -43,6 +43,8 @@ extern void gfs2_inplace_release(struct gfs2_inode *ip); extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n, bool dinode, u64 *generation); +extern int gfs2_rs_alloc(struct gfs2_inode *ip); +extern void gfs2_rs_delete(struct gfs2_inode *ip); extern void __gfs2_free_blocks(struct gfs2_inode *ip, u64 bstart, u32 blen, int meta); extern void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen); extern void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip); @@ -68,4 +70,12 @@ extern int gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset, const struct gfs2_bitmap *bi, unsigned minlen, u64 *ptrimmed); extern int gfs2_fitrim(struct file *filp, void __user *argp); +/* This is how to tell if a reservation is "inplace" reserved: */ +static inline int gfs2_mb_reserved(struct gfs2_inode *ip) +{ + if (ip->i_res && ip->i_res->rs_requested) + return 1; + return 0; +} + #endif /* __RGRP_DOT_H__ */ |