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authorBasavanagowda Kanur <gowda@gluster.com>2009-02-26 20:36:50 +0530
committerAnand V. Avati <avati@amp.gluster.com>2009-02-26 20:51:50 +0530
commitd3a318973c9613cfef8b1a14256fb5178e417fb0 (patch)
tree4a4c1b5275319a9c8680653118fe457a2db84929 /libglusterfs
parent431617ef19244272797106f2356ef31591e9c7b9 (diff)
fd->lock added to protect transactions for accessing and modifying fd->_ctx.
fd->_ctx access and modifications are now protected by fd->lock. Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
Diffstat (limited to 'libglusterfs')
-rw-r--r--libglusterfs/src/fd.c94
-rw-r--r--libglusterfs/src/fd.h3
2 files changed, 64 insertions, 33 deletions
diff --git a/libglusterfs/src/fd.c b/libglusterfs/src/fd.c
index 78c578842..bbd15201c 100644
--- a/libglusterfs/src/fd.c
+++ b/libglusterfs/src/fd.c
@@ -415,6 +415,8 @@ fd_destroy (fd_t *fd)
}
}
}
+
+ LOCK_DESTROY (&fd->lock);
FREE (fd->_ctx);
inode_unref (fd->inode);
@@ -489,6 +491,8 @@ fd_create (inode_t *inode, pid_t pid)
fd->pid = pid;
INIT_LIST_HEAD (&fd->inode_list);
+ LOCK_INIT (&fd->lock);
+
LOCK (&inode->lock);
fd = _fd_ref (fd);
UNLOCK (&inode->lock);
@@ -543,45 +547,61 @@ int
fd_ctx_set (fd_t *fd, xlator_t *xlator, uint64_t value)
{
int index = 0;
+ int ret = 0;
if (!fd || !xlator)
return -1;
-
- for (index = 0; index < xlator->ctx->xl_count; index++) {
- if (!fd->_ctx[index].key ||
- (fd->_ctx[index].key == (uint64_t)(long)xlator))
- break;
- }
+
+ LOCK (&fd->lock);
+ {
+ for (index = 0; index < xlator->ctx->xl_count; index++) {
+ if (!fd->_ctx[index].key ||
+ (fd->_ctx[index].key == (uint64_t)(long)xlator))
+ break;
+ }
- if (index == xlator->ctx->xl_count)
- return -1;
+ if (index == xlator->ctx->xl_count) {
+ ret = -1;
+ goto unlock;
+ }
- fd->_ctx[index].key = (uint64_t)(long) xlator;
- fd->_ctx[index].value = value;
+ fd->_ctx[index].key = (uint64_t)(long) xlator;
+ fd->_ctx[index].value = value;
+ }
+unlock:
+ UNLOCK (&fd->lock);
- return 0;
+ return ret;
}
int
fd_ctx_get (fd_t *fd, xlator_t *xlator, uint64_t *value)
{
int index = 0;
+ int ret = 0;
if (!fd || !xlator)
return -1;
+
+ LOCK (&fd->lock);
+ {
+ for (index = 0; index < xlator->ctx->xl_count; index++) {
+ if (fd->_ctx[index].key == (uint64_t)(long)xlator)
+ break;
+ }
- for (index = 0; index < xlator->ctx->xl_count; index++) {
- if (fd->_ctx[index].key == (uint64_t)(long)xlator)
- break;
- }
-
- if (index == xlator->ctx->xl_count)
- return -1;
+ if (index == xlator->ctx->xl_count) {
+ ret = -1;
+ goto unlock;
+ }
- if (value)
- *value = fd->_ctx[index].value;
+ if (value)
+ *value = fd->_ctx[index].value;
+ }
+unlock:
+ UNLOCK (&fd->lock);
- return 0;
+ return ret;
}
@@ -589,23 +609,31 @@ int
fd_ctx_del (fd_t *fd, xlator_t *xlator, uint64_t *value)
{
int index = 0;
+ int ret = 0;
if (!fd || !xlator)
return -1;
+
+ LOCK (&fd->lock);
+ {
+ for (index = 0; index < xlator->ctx->xl_count; index++) {
+ if (fd->_ctx[index].key == (uint64_t)(long)xlator)
+ break;
+ }
- for (index = 0; index < xlator->ctx->xl_count; index++) {
- if (fd->_ctx[index].key == (uint64_t)(long)xlator)
- break;
- }
-
- if (index == xlator->ctx->xl_count)
- return -1;
+ if (index == xlator->ctx->xl_count) {
+ ret = -1;
+ goto unlock;
+ }
- if (value)
- *value = fd->_ctx[index].value;
+ if (value)
+ *value = fd->_ctx[index].value;
- fd->_ctx[index].key = 0;
- fd->_ctx[index].value = 0;
+ fd->_ctx[index].key = 0;
+ fd->_ctx[index].value = 0;
+ }
+unlock:
+ UNLOCK (&fd->lock);
- return 0;
+ return ret;
}
diff --git a/libglusterfs/src/fd.h b/libglusterfs/src/fd.h
index 8b8effdc3..29a79eb76 100644
--- a/libglusterfs/src/fd.h
+++ b/libglusterfs/src/fd.h
@@ -29,6 +29,7 @@
#include <sys/types.h>
#include <unistd.h>
#include "glusterfs.h"
+#include "locking.h"
struct _inode;
struct _dict;
@@ -44,6 +45,8 @@ struct _fd {
struct list_head inode_list;
struct _inode *inode;
struct _dict *ctx;
+ gf_lock_t lock; /* used ONLY for manipulating
+ 'struct _fd_ctx' array (_ctx).*/
struct _fd_ctx *_ctx;
};
typedef struct _fd fd_t;