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authorLatchesar Ionkov <lucho@ionkov.net>2006-03-25 03:07:26 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-25 08:22:54 -0800
commit16cce6d27ef52e00cc124196046bbae7150024c1 (patch)
treed4494a6a5146fa7314138f674c2928e31c26bcc0 /fs/9p/vfs_inode.c
parent5174fdab9f58181249debab6e959ae4fd4abd0ed (diff)
downloadop-kernel-dev-16cce6d27ef52e00cc124196046bbae7150024c1.zip
op-kernel-dev-16cce6d27ef52e00cc124196046bbae7150024c1.tar.gz
[PATCH] v9fs: add extension field to Tcreate
Implement a new way of creating special files. Instead of Tcreate+Twstat, add one more field to Tcreate that contains special file description. Signed-off-by: Latchesar Ionkov <lucho@ionkov.net> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/9p/vfs_inode.c')
-rw-r--r--fs/9p/vfs_inode.c47
1 files changed, 19 insertions, 28 deletions
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index e46bb5a..dc67f83 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -255,8 +255,8 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
}
static int
-v9fs_create(struct v9fs_session_info *v9ses, u32 pfid, char *name,
- u32 perm, u8 mode, u32 *fidp, struct v9fs_qid *qid, u32 *iounit)
+v9fs_create(struct v9fs_session_info *v9ses, u32 pfid, char *name, u32 perm,
+ u8 mode, char *extension, u32 *fidp, struct v9fs_qid *qid, u32 *iounit)
{
u32 fid;
int err;
@@ -271,14 +271,14 @@ v9fs_create(struct v9fs_session_info *v9ses, u32 pfid, char *name,
err = v9fs_t_walk(v9ses, pfid, fid, NULL, &fcall);
if (err < 0) {
PRINT_FCALL_ERROR("clone error", fcall);
- goto error;
+ goto put_fid;
}
kfree(fcall);
- err = v9fs_t_create(v9ses, fid, name, perm, mode, &fcall);
+ err = v9fs_t_create(v9ses, fid, name, perm, mode, extension, &fcall);
if (err < 0) {
PRINT_FCALL_ERROR("create fails", fcall);
- goto error;
+ goto clunk_fid;
}
if (iounit)
@@ -293,7 +293,11 @@ v9fs_create(struct v9fs_session_info *v9ses, u32 pfid, char *name,
kfree(fcall);
return 0;
-error:
+clunk_fid:
+ v9fs_t_clunk(v9ses, fid);
+ fid = V9FS_NOFID;
+
+put_fid:
if (fid >= 0)
v9fs_put_idpool(fid, &v9ses->fidpool);
@@ -474,7 +478,7 @@ v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
flags = O_RDWR;
err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name,
- perm, v9fs_uflags2omode(flags), &fid, &qid, &iounit);
+ perm, v9fs_uflags2omode(flags), NULL, &fid, &qid, &iounit);
if (err)
goto error;
@@ -550,7 +554,7 @@ static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
perm = unixmode2p9mode(v9ses, mode | S_IFDIR);
err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name,
- perm, V9FS_OREAD, &fid, NULL, NULL);
+ perm, V9FS_OREAD, NULL, &fid, NULL, NULL);
if (err) {
dprintk(DEBUG_ERROR, "create error %d\n", err);
@@ -1008,11 +1012,13 @@ static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
/* copy extension buffer into buffer */
if (fcall->params.rstat.stat.extension.len < buflen)
- buflen = fcall->params.rstat.stat.extension.len;
+ buflen = fcall->params.rstat.stat.extension.len + 1;
- memcpy(buffer, fcall->params.rstat.stat.extension.str, buflen - 1);
+ memmove(buffer, fcall->params.rstat.stat.extension.str, buflen - 1);
buffer[buflen-1] = 0;
+ dprintk(DEBUG_ERROR, "%s -> %.*s (%s)\n", dentry->d_name.name, fcall->params.rstat.stat.extension.len,
+ fcall->params.rstat.stat.extension.str, buffer);
retval = buflen;
FreeFcall:
@@ -1072,7 +1078,7 @@ static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
if (!link)
link = ERR_PTR(-ENOMEM);
else {
- len = v9fs_readlink(dentry, link, strlen(link));
+ len = v9fs_readlink(dentry, link, PATH_MAX);
if (len < 0) {
__putname(link);
@@ -1109,10 +1115,7 @@ static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
struct v9fs_session_info *v9ses;
struct v9fs_fid *dfid, *vfid;
struct inode *inode;
- struct v9fs_fcall *fcall;
- struct v9fs_wstat wstat;
- fcall = NULL;
inode = NULL;
vfid = NULL;
v9ses = v9fs_inode2v9ses(dir);
@@ -1125,7 +1128,7 @@ static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
}
err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name,
- perm, V9FS_OREAD, &fid, NULL, NULL);
+ perm, V9FS_OREAD, (char *) extension, &fid, NULL, NULL);
if (err)
goto error;
@@ -1148,23 +1151,11 @@ static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
goto error;
}
- /* issue a Twstat */
- v9fs_blank_wstat(&wstat);
- wstat.muid = v9ses->name;
- wstat.extension = (char *) extension;
- err = v9fs_t_wstat(v9ses, vfid->fid, &wstat, &fcall);
- if (err < 0) {
- PRINT_FCALL_ERROR("wstat error", fcall);
- goto error;
- }
-
- kfree(fcall);
dentry->d_op = &v9fs_dentry_operations;
d_instantiate(dentry, inode);
return 0;
error:
- kfree(fcall);
if (vfid)
v9fs_fid_destroy(vfid);
@@ -1224,7 +1215,7 @@ v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
}
name = __getname();
- sprintf(name, "hardlink(%d)\n", oldfid->fid);
+ sprintf(name, "%d\n", oldfid->fid);
retval = v9fs_vfs_mkspecial(dir, dentry, V9FS_DMLINK, name);
__putname(name);
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