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authorBrian Foster <bfoster@redhat.com>2013-05-08 08:54:11 -0400
committerAnand Avati <avati@redhat.com>2013-06-13 14:37:21 -0700
commitd1ccc4e400728d90f2ef7904661f53deb7199123 (patch)
tree1c491d1932795d85941861fa683431ee22608668 /xlators/features/quota
parent328ea4b16a276b0e65ca719f60b82ce851dda848 (diff)
gluster: add fallocate fop support
Implement support for the fallocate file operation. fallocate allocates blocks for a particular inode such that future writes to the associated region of the file are guaranteed not to fail with ENOSPC. This patch adds fallocate support to the following areas: - libglusterfs - mount/fuse - io-stats - performance/md-cache,open-behind - quota - cluster/afr,dht,stripe - rpc/xdr - protocol/client,server - io-threads - marker - storage/posix - libgfapi BUG: 949242 Change-Id: Ice8e61351f9d6115c5df68768bc844abbf0ce8bd Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-on: http://review.gluster.org/4969 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Anand Avati <avati@redhat.com>
Diffstat (limited to 'xlators/features/quota')
-rw-r--r--xlators/features/quota/src/quota.c172
1 files changed, 172 insertions, 0 deletions
diff --git a/xlators/features/quota/src/quota.c b/xlators/features/quota/src/quota.c
index 4ea54cca8..c527e7ca7 100644
--- a/xlators/features/quota/src/quota.c
+++ b/xlators/features/quota/src/quota.c
@@ -2969,6 +2969,177 @@ err:
return 0;
}
+int32_t
+quota_fallocate_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
+ struct iatt *postbuf, dict_t *xdata)
+{
+ int32_t ret = 0;
+ uint64_t ctx_int = 0;
+ quota_inode_ctx_t *ctx = NULL;
+ quota_local_t *local = NULL;
+ quota_dentry_t *dentry = NULL;
+ int64_t delta = 0;
+
+ local = frame->local;
+
+ if ((op_ret < 0) || (local == NULL)) {
+ goto out;
+ }
+
+ ret = inode_ctx_get (local->loc.inode, this, &ctx_int);
+ if (ret) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "%s: failed to get the context", local->loc.path);
+ goto out;
+ }
+
+ ctx = (quota_inode_ctx_t *)(unsigned long) ctx_int;
+
+ if (ctx == NULL) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "quota context not set in %s (gfid:%s)",
+ local->loc.path, uuid_utoa (local->loc.inode->gfid));
+ goto out;
+ }
+
+ LOCK (&ctx->lock);
+ {
+ ctx->buf = *postbuf;
+ }
+ UNLOCK (&ctx->lock);
+
+ list_for_each_entry (dentry, &ctx->parents, next) {
+ delta = (postbuf->ia_blocks - prebuf->ia_blocks) * 512;
+ quota_update_size (this, local->loc.inode,
+ dentry->name, dentry->par, delta);
+ }
+
+out:
+ QUOTA_STACK_UNWIND (fallocate, frame, op_ret, op_errno, prebuf, postbuf,
+ xdata);
+
+ return 0;
+}
+
+int32_t
+quota_fallocate_helper(call_frame_t *frame, xlator_t *this, fd_t *fd,
+ int32_t mode, off_t offset, size_t len, dict_t *xdata)
+{
+ quota_local_t *local = NULL;
+ int32_t op_errno = EINVAL;
+
+ local = frame->local;
+ if (local == NULL) {
+ gf_log (this->name, GF_LOG_WARNING, "local is NULL");
+ goto unwind;
+ }
+
+ if (local->op_ret == -1) {
+ op_errno = local->op_errno;
+ goto unwind;
+ }
+
+ STACK_WIND (frame, quota_fallocate_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->fallocate, fd, mode, offset, len,
+ xdata);
+ return 0;
+
+unwind:
+ QUOTA_STACK_UNWIND (fallocate, frame, -1, op_errno, NULL, NULL, NULL);
+ return 0;
+}
+
+int32_t
+quota_fallocate(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t mode,
+ off_t offset, size_t len, dict_t *xdata)
+{
+ int32_t ret = -1, op_errno = EINVAL;
+ int32_t parents = 0;
+ quota_local_t *local = NULL;
+ quota_inode_ctx_t *ctx = NULL;
+ quota_priv_t *priv = NULL;
+ call_stub_t *stub = NULL;
+ quota_dentry_t *dentry = NULL;
+
+ GF_ASSERT (frame);
+ GF_VALIDATE_OR_GOTO ("quota", this, unwind);
+ GF_VALIDATE_OR_GOTO (this->name, fd, unwind);
+
+ local = quota_local_new ();
+ if (local == NULL) {
+ goto unwind;
+ }
+
+ frame->local = local;
+ local->loc.inode = inode_ref (fd->inode);
+
+ ret = quota_inode_ctx_get (fd->inode, -1, this, NULL, NULL, &ctx, 0);
+ if (ctx == NULL) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "quota context not set in inode (gfid:%s)",
+ uuid_utoa (fd->inode->gfid));
+ goto unwind;
+ }
+
+ stub = fop_fallocate_stub(frame, quota_fallocate_helper, fd, mode, offset, len,
+ xdata);
+ if (stub == NULL) {
+ op_errno = ENOMEM;
+ goto unwind;
+ }
+
+ priv = this->private;
+ GF_VALIDATE_OR_GOTO (this->name, priv, unwind);
+
+ LOCK (&ctx->lock);
+ {
+ list_for_each_entry (dentry, &ctx->parents, next) {
+ parents++;
+ }
+ }
+ UNLOCK (&ctx->lock);
+
+ /*
+ * Note that by using len as the delta we're assuming the range from
+ * offset to offset+len has not already been allocated. This can result
+ * in ENOSPC errors attempting to allocate an already allocated range.
+ */
+ local->delta = len;
+ local->stub = stub;
+ local->link_count = parents;
+
+ list_for_each_entry (dentry, &ctx->parents, next) {
+ ret = quota_check_limit (frame, fd->inode, this, dentry->name,
+ dentry->par);
+ if (ret == -1) {
+ break;
+ }
+ }
+
+ stub = NULL;
+
+ LOCK (&local->lock);
+ {
+ local->link_count = 0;
+ if (local->validate_count == 0) {
+ stub = local->stub;
+ local->stub = NULL;
+ }
+ }
+ UNLOCK (&local->lock);
+
+ if (stub != NULL) {
+ call_resume (stub);
+ }
+
+ return 0;
+
+unwind:
+ QUOTA_STACK_UNWIND (fallocate, frame, -1, op_errno, NULL, NULL, NULL);
+ return 0;
+}
+
int32_t
mem_acct_init (xlator_t *this)
@@ -3304,6 +3475,7 @@ struct xlator_fops fops = {
.removexattr = quota_removexattr,
.fremovexattr = quota_fremovexattr,
.readdirp = quota_readdirp,
+ .fallocate = quota_fallocate,
};
struct xlator_cbks cbks = {