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[PATCH] v9fs: add extension field to Tcreate

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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>
This commit is contained in:
Latchesar Ionkov
2006-03-25 03:07:26 -08:00
committed by Linus Torvalds
parent 5174fdab9f
commit 16cce6d27e
6 changed files with 50 additions and 51 deletions
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47
fs/9p/vfs_inode.c
View File

@@ -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);