summaryrefslogtreecommitdiffstats
path: root/include/net/9p
diff options
context:
space:
mode:
authorSripathi Kodi <sripathik@in.ibm.com>2010-06-04 13:41:26 +0000
committerEric Van Hensbergen <ericvh@gmail.com>2010-08-02 14:25:07 -0500
commit7751bdb3a095ad32dd4fcff3443cf8dd4cb1e748 (patch)
tree6c7a93a546e34d86e433a1be05e3ebfcc4f77754 /include/net/9p
parent97e8442b0971ea6be9a495b3d03402985cfe5d6a (diff)
downloadlinux-7751bdb3a095ad32dd4fcff3443cf8dd4cb1e748.tar.bz2
9p: readdir implementation for 9p2000.L
This patch implements the kernel part of readdir() implementation for 9p2000.L Change from V3: Instead of inode, server now sends qids for each dirent SYNOPSIS size[4] Treaddir tag[2] fid[4] offset[8] count[4] size[4] Rreaddir tag[2] count[4] data[count] DESCRIPTION The readdir request asks the server to read the directory specified by 'fid' at an offset specified by 'offset' and return as many dirent structures as possible that fit into count bytes. Each dirent structure is laid out as follows. qid.type[1] the type of the file (directory, etc.), represented as a bit vector corresponding to the high 8 bits of the file's mode word. qid.vers[4] version number for given path qid.path[8] the file server's unique identification for the file offset[8] offset into the next dirent. type[1] type of this directory entry. name[256] name of this directory entry. This patch adds v9fs_dir_readdir_dotl() as the readdir() call for 9p2000.L. This function sends P9_TREADDIR command to the server. In response the server sends a buffer filled with dirent structures. This is different from the existing v9fs_dir_readdir() call which receives stat structures from the server. This results in significant speedup of readdir() on large directories. For example, doing 'ls >/dev/null' on a directory with 10000 files on my laptop takes 1.088 seconds with the existing code, but only takes 0.339 seconds with the new readdir. Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'include/net/9p')
-rw-r--r--include/net/9p/9p.h17
-rw-r--r--include/net/9p/client.h18
2 files changed, 35 insertions, 0 deletions
diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h
index 156c26bb8bd7..f1b0b310265d 100644
--- a/include/net/9p/9p.h
+++ b/include/net/9p/9p.h
@@ -133,6 +133,8 @@ enum p9_msg_t {
P9_RSTATFS,
P9_TRENAME = 20,
P9_RRENAME,
+ P9_TREADDIR = 40,
+ P9_RREADDIR,
P9_TVERSION = 100,
P9_RVERSION,
P9_TAUTH = 102,
@@ -275,6 +277,9 @@ enum p9_qid_t {
/* ample room for Twrite/Rread header */
#define P9_IOHDRSZ 24
+/* Room for readdir header */
+#define P9_READDIRHDRSZ 24
+
/**
* struct p9_str - length prefixed string type
* @len: length of the string
@@ -485,6 +490,18 @@ struct p9_rwrite {
u32 count;
};
+struct p9_treaddir {
+ u32 fid;
+ u64 offset;
+ u32 count;
+};
+
+struct p9_rreaddir {
+ u32 count;
+ u8 *data;
+};
+
+
struct p9_tclunk {
u32 fid;
};
diff --git a/include/net/9p/client.h b/include/net/9p/client.h
index 7dd3ed85c782..2ec93685e6db 100644
--- a/include/net/9p/client.h
+++ b/include/net/9p/client.h
@@ -195,6 +195,21 @@ struct p9_fid {
struct list_head dlist; /* list of all fids attached to a dentry */
};
+/**
+ * struct p9_dirent - directory entry structure
+ * @qid: The p9 server qid for this dirent
+ * @d_off: offset to the next dirent
+ * @d_type: type of file
+ * @d_name: file name
+ */
+
+struct p9_dirent {
+ struct p9_qid qid;
+ u64 d_off;
+ unsigned char d_type;
+ char d_name[256];
+};
+
int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb);
int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name);
int p9_client_version(struct p9_client *);
@@ -217,6 +232,9 @@ int p9_client_read(struct p9_fid *fid, char *data, char __user *udata,
u64 offset, u32 count);
int p9_client_write(struct p9_fid *fid, char *data, const char __user *udata,
u64 offset, u32 count);
+int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset);
+int p9dirent_read(char *buf, int len, struct p9_dirent *dirent,
+ int proto_version);
struct p9_wstat *p9_client_stat(struct p9_fid *fid);
int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst);