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[PATCH] v9fs: new multiplexer implementation

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New multiplexer implementation. Decreases the number of kernel threads
required. Better handling when the user process receives a signal.

Signed-off-by: Latchesar Ionkov <lucho@ionkov.net>
Cc: Eric Van Hensbergen <ericvh@ericvh.myip.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Latchesar Ionkov
2006-01-08 01:04:58 -08:00
committed by Linus Torvalds
parent f5ef3c105b
commit 3cf6429a26
16 changed files with 1223 additions and 613 deletions
Download Patch File Download Diff File Expand all files Collapse all files

89
fs/9p/vfs_inode.c
View File

@ -318,6 +318,7 @@ v9fs_create(struct inode *dir,
int result = 0;
unsigned int iounit = 0;
int wfidno = -1;
int err;
perm = unixmode2p9mode(v9ses, perm);
@ -356,6 +357,7 @@ v9fs_create(struct inode *dir,
}
kfree(fcall);
fcall = NULL;
result = v9fs_t_create(v9ses, newfid, (char *)file_dentry->d_name.name,
perm, open_mode, &fcall);
@ -369,17 +371,24 @@ v9fs_create(struct inode *dir,
iounit = fcall->params.rcreate.iounit;
qid = fcall->params.rcreate.qid;
kfree(fcall);
fcall = NULL;
fid = v9fs_fid_create(file_dentry, v9ses, newfid, 1);
dprintk(DEBUG_VFS, "fid %p %d\n", fid, fid->fidcreate);
if (!fid) {
result = -ENOMEM;
goto CleanUpFid;
if (!(perm&V9FS_DMDIR)) {
fid = v9fs_fid_create(file_dentry, v9ses, newfid, 1);
dprintk(DEBUG_VFS, "fid %p %d\n", fid, fid->fidcreate);
if (!fid) {
result = -ENOMEM;
goto CleanUpFid;
}
fid->qid = qid;
fid->iounit = iounit;
} else {
err = v9fs_t_clunk(v9ses, newfid);
if (err < 0)
dprintk(DEBUG_ERROR, "clunk for mkdir failed: %d\n", err);
}
fid->qid = qid;
fid->iounit = iounit;
/* walk to the newly created file and put the fid in the dentry */
wfidno = v9fs_get_idpool(&v9ses->fidpool);
if (newfid < 0) {
@ -388,18 +397,19 @@ v9fs_create(struct inode *dir,
}
result = v9fs_t_walk(v9ses, dirfidnum, wfidno,
(char *) file_dentry->d_name.name, NULL);
(char *) file_dentry->d_name.name, &fcall);
if (result < 0) {
dprintk(DEBUG_ERROR, "clone error: %s\n", FCALL_ERROR(fcall));
v9fs_put_idpool(wfidno, &v9ses->fidpool);
wfidno = -1;
goto CleanUpFid;
}
kfree(fcall);
fcall = NULL;
if (!v9fs_fid_create(file_dentry, v9ses, wfidno, 0)) {
if (!v9fs_t_clunk(v9ses, newfid, &fcall)) {
v9fs_put_idpool(wfidno, &v9ses->fidpool);
}
v9fs_t_clunk(v9ses, newfid);
v9fs_put_idpool(wfidno, &v9ses->fidpool);
goto CleanUpFid;
}
@ -431,40 +441,21 @@ v9fs_create(struct inode *dir,
file_dentry->d_op = &v9fs_dentry_operations;
d_instantiate(file_dentry, file_inode);
if (perm & V9FS_DMDIR) {
if (!v9fs_t_clunk(v9ses, newfid, &fcall))
v9fs_put_idpool(newfid, &v9ses->fidpool);
else
dprintk(DEBUG_ERROR, "clunk for mkdir failed: %s\n",
FCALL_ERROR(fcall));
kfree(fcall);
fid->fidopen = 0;
fid->fidcreate = 0;
d_drop(file_dentry);
}
return 0;
CleanUpFid:
kfree(fcall);
fcall = NULL;
if (newfid >= 0) {
if (!v9fs_t_clunk(v9ses, newfid, &fcall))
v9fs_put_idpool(newfid, &v9ses->fidpool);
else
dprintk(DEBUG_ERROR, "clunk failed: %s\n",
FCALL_ERROR(fcall));
kfree(fcall);
err = v9fs_t_clunk(v9ses, newfid);
if (err < 0)
dprintk(DEBUG_ERROR, "clunk failed: %d\n", err);
}
if (wfidno >= 0) {
if (!v9fs_t_clunk(v9ses, wfidno, &fcall))
v9fs_put_idpool(wfidno, &v9ses->fidpool);
else
dprintk(DEBUG_ERROR, "clunk failed: %s\n",
FCALL_ERROR(fcall));
kfree(fcall);
err = v9fs_t_clunk(v9ses, wfidno);
if (err < 0)
dprintk(DEBUG_ERROR, "clunk failed: %d\n", err);
}
return result;
}
@ -972,6 +963,7 @@ v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
struct v9fs_fcall *fcall = NULL;
struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
int err;
dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
symname);
@ -1004,9 +996,9 @@ v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
kfree(fcall);
if (v9fs_t_clunk(v9ses, newfid->fid, &fcall)) {
dprintk(DEBUG_ERROR, "clunk for symlink failed: %s\n",
FCALL_ERROR(fcall));
err = v9fs_t_clunk(v9ses, newfid->fid);
if (err < 0) {
dprintk(DEBUG_ERROR, "clunk for symlink failed: %d\n", err);
goto FreeFcall;
}
@ -1180,6 +1172,7 @@ v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry);
struct v9fs_fid *newfid = NULL;
char *symname = __getname();
int err;
dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
old_dentry->d_name.name);
@ -1216,9 +1209,10 @@ v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
kfree(fcall);
if (v9fs_t_clunk(v9ses, newfid->fid, &fcall)) {
dprintk(DEBUG_ERROR, "clunk for symlink failed: %s\n",
FCALL_ERROR(fcall));
err = v9fs_t_clunk(v9ses, newfid->fid);
if (err < 0) {
dprintk(DEBUG_ERROR, "clunk for symlink failed: %d\n", err);
goto FreeMem;
}
@ -1252,6 +1246,7 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
struct v9fs_fcall *fcall = NULL;
struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
char *symname = __getname();
int err;
dprintk(DEBUG_VFS, " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
@ -1310,9 +1305,9 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
/* need to update dcache so we show up */
kfree(fcall);
if (v9fs_t_clunk(v9ses, newfid->fid, &fcall)) {
dprintk(DEBUG_ERROR, "clunk for symlink failed: %s\n",
FCALL_ERROR(fcall));
err = v9fs_t_clunk(v9ses, newfid->fid);
if (err < 0) {
dprintk(DEBUG_ERROR, "clunk for symlink failed: %d\n", err);
goto FreeMem;
}