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-rw-r--r--fs/9p/error.c1
-rw-r--r--fs/9p/fid.c69
-rw-r--r--fs/9p/fid.h5
-rw-r--r--fs/9p/mux.c4
-rw-r--r--fs/9p/v9fs.c11
-rw-r--r--fs/9p/vfs_file.c47
-rw-r--r--fs/9p/vfs_inode.c206
-rw-r--r--fs/binfmt_elf.c51
-rw-r--r--fs/binfmt_elf_fdpic.c8
-rw-r--r--fs/buffer.c15
-rw-r--r--fs/fs-writeback.c13
-rw-r--r--fs/nfsd/nfs3xdr.c9
-rw-r--r--fs/nfsd/nfs4xdr.c5
-rw-r--r--fs/nfsd/nfssvc.c8
-rw-r--r--fs/nfsd/nfsxdr.c5
-rw-r--r--fs/nfsd/vfs.c28
-rw-r--r--fs/proc/base.c8
17 files changed, 320 insertions, 173 deletions
diff --git a/fs/9p/error.c b/fs/9p/error.c
index ae91555c1558..0d7fa4e08812 100644
--- a/fs/9p/error.c
+++ b/fs/9p/error.c
@@ -83,6 +83,7 @@ int v9fs_errstr2errno(char *errstr, int len)
if (errno == 0) {
/* TODO: if error isn't found, add it dynamically */
+ errstr[len] = 0;
printk(KERN_ERR "%s: errstr :%s: not found\n", __FUNCTION__,
errstr);
errno = 1;
diff --git a/fs/9p/fid.c b/fs/9p/fid.c
index 27507201f9e7..a9b6301a04fc 100644
--- a/fs/9p/fid.c
+++ b/fs/9p/fid.c
@@ -25,6 +25,7 @@
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/idr.h>
+#include <asm/semaphore.h>
#include "debug.h"
#include "v9fs.h"
@@ -84,6 +85,7 @@ struct v9fs_fid *v9fs_fid_create(struct v9fs_session_info *v9ses, int fid)
new->iounit = 0;
new->rdir_pos = 0;
new->rdir_fcall = NULL;
+ init_MUTEX(&new->lock);
INIT_LIST_HEAD(&new->list);
return new;
@@ -102,11 +104,11 @@ void v9fs_fid_destroy(struct v9fs_fid *fid)
}
/**
- * v9fs_fid_lookup - retrieve the right fid from a particular dentry
+ * v9fs_fid_lookup - return a locked fid from a dentry
* @dentry: dentry to look for fid in
- * @type: intent of lookup (operation or traversal)
*
- * find a fid in the dentry
+ * find a fid in the dentry, obtain its semaphore and return a reference to it.
+ * code calling lookup is responsible for releasing lock
*
* TODO: only match fids that have the same uid as current user
*
@@ -124,7 +126,68 @@ struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry)
if (!return_fid) {
dprintk(DEBUG_ERROR, "Couldn't find a fid in dentry\n");
+ return_fid = ERR_PTR(-EBADF);
}
+ if(down_interruptible(&return_fid->lock))
+ return ERR_PTR(-EINTR);
+
return return_fid;
}
+
+/**
+ * v9fs_fid_clone - lookup the fid for a dentry, clone a private copy and release it
+ * @dentry: dentry to look for fid in
+ *
+ * find a fid in the dentry and then clone to a new private fid
+ *
+ * TODO: only match fids that have the same uid as current user
+ *
+ */
+
+struct v9fs_fid *v9fs_fid_clone(struct dentry *dentry)
+{
+ struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
+ struct v9fs_fid *base_fid, *new_fid = ERR_PTR(-EBADF);
+ struct v9fs_fcall *fcall = NULL;
+ int fid, err;
+
+ base_fid = v9fs_fid_lookup(dentry);
+
+ if(IS_ERR(base_fid))
+ return base_fid;
+
+ if(base_fid) { /* clone fid */
+ fid = v9fs_get_idpool(&v9ses->fidpool);
+ if (fid < 0) {
+ eprintk(KERN_WARNING, "newfid fails!\n");
+ new_fid = ERR_PTR(-ENOSPC);
+ goto Release_Fid;
+ }
+
+ err = v9fs_t_walk(v9ses, base_fid->fid, fid, NULL, &fcall);
+ if (err < 0) {
+ dprintk(DEBUG_ERROR, "clone walk didn't work\n");
+ v9fs_put_idpool(fid, &v9ses->fidpool);
+ new_fid = ERR_PTR(err);
+ goto Free_Fcall;
+ }
+ new_fid = v9fs_fid_create(v9ses, fid);
+ if (new_fid == NULL) {
+ dprintk(DEBUG_ERROR, "out of memory\n");
+ new_fid = ERR_PTR(-ENOMEM);
+ }
+Free_Fcall:
+ kfree(fcall);
+ }
+
+Release_Fid:
+ up(&base_fid->lock);
+ return new_fid;
+}
+
+void v9fs_fid_clunk(struct v9fs_session_info *v9ses, struct v9fs_fid *fid)
+{
+ v9fs_t_clunk(v9ses, fid->fid);
+ v9fs_fid_destroy(fid);
+}
diff --git a/fs/9p/fid.h b/fs/9p/fid.h
index aa974d6875c3..48fc170c26c8 100644
--- a/fs/9p/fid.h
+++ b/fs/9p/fid.h
@@ -30,6 +30,8 @@ struct v9fs_fid {
struct list_head list; /* list of fids associated with a dentry */
struct list_head active; /* XXX - debug */
+ struct semaphore lock;
+
u32 fid;
unsigned char fidopen; /* set when fid is opened */
unsigned char fidclunked; /* set when fid has already been clunked */
@@ -55,3 +57,6 @@ struct v9fs_fid *v9fs_fid_get_created(struct dentry *);
void v9fs_fid_destroy(struct v9fs_fid *fid);
struct v9fs_fid *v9fs_fid_create(struct v9fs_session_info *, int fid);
int v9fs_fid_insert(struct v9fs_fid *fid, struct dentry *dentry);
+struct v9fs_fid *v9fs_fid_clone(struct dentry *dentry);
+void v9fs_fid_clunk(struct v9fs_session_info *v9ses, struct v9fs_fid *fid);
+
diff --git a/fs/9p/mux.c b/fs/9p/mux.c
index 944273c3dbff..147ceef8e537 100644
--- a/fs/9p/mux.c
+++ b/fs/9p/mux.c
@@ -132,8 +132,10 @@ int v9fs_mux_global_init(void)
v9fs_mux_poll_tasks[i].task = NULL;
v9fs_mux_wq = create_workqueue("v9fs");
- if (!v9fs_mux_wq)
+ if (!v9fs_mux_wq) {
+ printk(KERN_WARNING "v9fs: mux: creating workqueue failed\n");
return -ENOMEM;
+ }
return 0;
}
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
index 0b96fae8b479..d9b561ba5e58 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -457,14 +457,19 @@ static int __init init_v9fs(void)
v9fs_error_init();
- printk(KERN_INFO "Installing v9fs 9P2000 file system support\n");
+ printk(KERN_INFO "Installing v9fs 9p2000 file system support\n");
ret = v9fs_mux_global_init();
- if (!ret)
+ if (ret) {
+ printk(KERN_WARNING "v9fs: starting mux failed\n");
return ret;
+ }
ret = register_filesystem(&v9fs_fs_type);
- if (!ret)
+ if (ret) {
+ printk(KERN_WARNING "v9fs: registering file system failed\n");
v9fs_mux_global_exit();
+ }
+
return ret;
}
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index e86a07151280..9f17b0cacdd0 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -55,53 +55,22 @@ int v9fs_file_open(struct inode *inode, struct file *file)
struct v9fs_fid *vfid;
struct v9fs_fcall *fcall = NULL;
int omode;
- int fid = V9FS_NOFID;
int err;
dprintk(DEBUG_VFS, "inode: %p file: %p \n", inode, file);
- vfid = v9fs_fid_lookup(file->f_path.dentry);
- if (!vfid) {
- dprintk(DEBUG_ERROR, "Couldn't resolve fid from dentry\n");
- return -EBADF;
- }
-
- fid = v9fs_get_idpool(&v9ses->fidpool);
- if (fid < 0) {
- eprintk(KERN_WARNING, "newfid fails!\n");
- return -ENOSPC;
- }
+ vfid = v9fs_fid_clone(file->f_path.dentry);
+ if (IS_ERR(vfid))
+ return PTR_ERR(vfid);
- err = v9fs_t_walk(v9ses, vfid->fid, fid, NULL, &fcall);
- if (err < 0) {
- dprintk(DEBUG_ERROR, "rewalk didn't work\n");
- if (fcall && fcall->id == RWALK)
- goto clunk_fid;
- else {
- v9fs_put_idpool(fid, &v9ses->fidpool);
- goto free_fcall;
- }
- }
- kfree(fcall);
-
- /* TODO: do special things for O_EXCL, O_NOFOLLOW, O_SYNC */
- /* translate open mode appropriately */
omode = v9fs_uflags2omode(file->f_flags);
- err = v9fs_t_open(v9ses, fid, omode, &fcall);
+ err = v9fs_t_open(v9ses, vfid->fid, omode, &fcall);
if (err < 0) {
PRINT_FCALL_ERROR("open failed", fcall);
- goto clunk_fid;
- }
-
- vfid = kmalloc(sizeof(struct v9fs_fid), GFP_KERNEL);
- if (vfid == NULL) {
- dprintk(DEBUG_ERROR, "out of memory\n");
- err = -ENOMEM;
- goto clunk_fid;
+ goto Clunk_Fid;
}
file->private_data = vfid;
- vfid->fid = fid;
vfid->fidopen = 1;
vfid->fidclunked = 0;
vfid->iounit = fcall->params.ropen.iounit;
@@ -112,10 +81,8 @@ int v9fs_file_open(struct inode *inode, struct file *file)
return 0;
-clunk_fid:
- v9fs_t_clunk(v9ses, fid);
-
-free_fcall:
+Clunk_Fid:
+ v9fs_fid_clunk(v9ses, vfid);
kfree(fcall);
return err;
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 18f26cdfd882..9109ba1d6969 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -416,12 +416,8 @@ static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
sb = file_inode->i_sb;
v9ses = v9fs_inode2v9ses(file_inode);
v9fid = v9fs_fid_lookup(file);
-
- if (!v9fid) {
- dprintk(DEBUG_ERROR,
- "no v9fs_fid\n");
- return -EBADF;
- }
+ if(IS_ERR(v9fid))
+ return PTR_ERR(v9fid);
fid = v9fid->fid;
if (fid < 0) {
@@ -433,11 +429,13 @@ static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
result = v9fs_t_remove(v9ses, fid, &fcall);
if (result < 0) {
PRINT_FCALL_ERROR("remove fails", fcall);
+ goto Error;
}
v9fs_put_idpool(fid, &v9ses->fidpool);
v9fs_fid_destroy(v9fid);
+Error:
kfree(fcall);
return result;
}
@@ -473,9 +471,13 @@ v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
inode = NULL;
vfid = NULL;
v9ses = v9fs_inode2v9ses(dir);
- dfid = v9fs_fid_lookup(dentry->d_parent);
- perm = unixmode2p9mode(v9ses, mode);
+ dfid = v9fs_fid_clone(dentry->d_parent);
+ if(IS_ERR(dfid)) {
+ err = PTR_ERR(dfid);
+ goto error;
+ }
+ perm = unixmode2p9mode(v9ses, mode);
if (nd && nd->flags & LOOKUP_OPEN)
flags = nd->intent.open.flags - 1;
else
@@ -485,9 +487,10 @@ v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
perm, v9fs_uflags2omode(flags), NULL, &fid, &qid, &iounit);
if (err)
- goto error;
+ goto clunk_dfid;
vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry);
+ v9fs_fid_clunk(v9ses, dfid);
if (IS_ERR(vfid)) {
err = PTR_ERR(vfid);
vfid = NULL;
@@ -525,6 +528,9 @@ v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
return 0;
+clunk_dfid:
+ v9fs_fid_clunk(v9ses, dfid);
+
error:
if (vfid)
v9fs_fid_destroy(vfid);
@@ -551,7 +557,12 @@ static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
inode = NULL;
vfid = NULL;
v9ses = v9fs_inode2v9ses(dir);
- dfid = v9fs_fid_lookup(dentry->d_parent);
+ dfid = v9fs_fid_clone(dentry->d_parent);
+ if(IS_ERR(dfid)) {
+ err = PTR_ERR(dfid);
+ goto error;
+ }
+
perm = unixmode2p9mode(v9ses, mode | S_IFDIR);
err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name,
@@ -559,37 +570,36 @@ static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
if (err) {
dprintk(DEBUG_ERROR, "create error %d\n", err);
- goto error;
- }
-
- err = v9fs_t_clunk(v9ses, fid);
- if (err) {
- dprintk(DEBUG_ERROR, "clunk error %d\n", err);
- goto error;
+ goto clean_up_dfid;
}
vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry);
if (IS_ERR(vfid)) {
err = PTR_ERR(vfid);
vfid = NULL;
- goto error;
+ goto clean_up_dfid;
}
+ v9fs_fid_clunk(v9ses, dfid);
inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
inode = NULL;
- goto error;
+ goto clean_up_fids;
}
dentry->d_op = &v9fs_dentry_operations;
d_instantiate(dentry, inode);
return 0;
-error:
+clean_up_fids:
if (vfid)
v9fs_fid_destroy(vfid);
+clean_up_dfid:
+ v9fs_fid_clunk(v9ses, dfid);
+
+error:
return err;
}
@@ -622,28 +632,23 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
dentry->d_op = &v9fs_dentry_operations;
dirfid = v9fs_fid_lookup(dentry->d_parent);
- if (!dirfid) {
- dprintk(DEBUG_ERROR, "no dirfid\n");
- return ERR_PTR(-EINVAL);
- }
+ if(IS_ERR(dirfid))
+ return ERR_PTR(PTR_ERR(dirfid));
dirfidnum = dirfid->fid;
- if (dirfidnum < 0) {
- dprintk(DEBUG_ERROR, "no dirfid for inode %p, #%lu\n",
- dir, dir->i_ino);
- return ERR_PTR(-EBADF);
- }
-
newfid = v9fs_get_idpool(&v9ses->fidpool);
if (newfid < 0) {
eprintk(KERN_WARNING, "newfid fails!\n");
- return ERR_PTR(-ENOSPC);
+ result = -ENOSPC;
+ goto Release_Dirfid;
}
result = v9fs_t_walk(v9ses, dirfidnum, newfid,
(char *)dentry->d_name.name, &fcall);
+ up(&dirfid->lock);
+
if (result < 0) {
if (fcall && fcall->id == RWALK)
v9fs_t_clunk(v9ses, newfid);
@@ -701,8 +706,12 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
return NULL;
- FreeFcall:
+Release_Dirfid:
+ up(&dirfid->lock);
+
+FreeFcall:
kfree(fcall);
+
return ERR_PTR(result);
}
@@ -746,10 +755,8 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *old_inode = old_dentry->d_inode;
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(old_inode);
struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry);
- struct v9fs_fid *olddirfid =
- v9fs_fid_lookup(old_dentry->d_parent);
- struct v9fs_fid *newdirfid =
- v9fs_fid_lookup(new_dentry->d_parent);
+ struct v9fs_fid *olddirfid;
+ struct v9fs_fid *newdirfid;
struct v9fs_wstat wstat;
struct v9fs_fcall *fcall = NULL;
int fid = -1;
@@ -759,16 +766,26 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
dprintk(DEBUG_VFS, "\n");
- if ((!oldfid) || (!olddirfid) || (!newdirfid)) {
- dprintk(DEBUG_ERROR, "problem with arguments\n");
- return -EBADF;
+ if(IS_ERR(oldfid))
+ return PTR_ERR(oldfid);
+
+ olddirfid = v9fs_fid_clone(old_dentry->d_parent);
+ if(IS_ERR(olddirfid)) {
+ retval = PTR_ERR(olddirfid);
+ goto Release_lock;
+ }
+
+ newdirfid = v9fs_fid_clone(new_dentry->d_parent);
+ if(IS_ERR(newdirfid)) {
+ retval = PTR_ERR(newdirfid);
+ goto Clunk_olddir;
}
/* 9P can only handle file rename in the same directory */
if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) {
dprintk(DEBUG_ERROR, "old dir and new dir are different\n");
- retval = -EPERM;
- goto FreeFcallnBail;
+ retval = -EXDEV;
+ goto Clunk_newdir;
}
fid = oldfid->fid;
@@ -779,7 +796,7 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
dprintk(DEBUG_ERROR, "no fid for old file #%lu\n",
old_inode->i_ino);
retval = -EBADF;
- goto FreeFcallnBail;
+ goto Clunk_newdir;
}
v9fs_blank_wstat(&wstat);
@@ -788,11 +805,20 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
retval = v9fs_t_wstat(v9ses, fid, &wstat, &fcall);
- FreeFcallnBail:
if (retval < 0)
PRINT_FCALL_ERROR("wstat error", fcall);
kfree(fcall);
+
+Clunk_newdir:
+ v9fs_fid_clunk(v9ses, newdirfid);
+
+Clunk_olddir:
+ v9fs_fid_clunk(v9ses, olddirfid);
+
+Release_lock:
+ up(&oldfid->lock);
+
return retval;
}
@@ -810,15 +836,12 @@ v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
{
struct v9fs_fcall *fcall = NULL;
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
- struct v9fs_fid *fid = v9fs_fid_lookup(dentry);
+ struct v9fs_fid *fid = v9fs_fid_clone(dentry);
int err = -EPERM;
dprintk(DEBUG_VFS, "dentry: %p\n", dentry);
- if (!fid) {
- dprintk(DEBUG_ERROR,
- "couldn't find fid associated with dentry\n");
- return -EBADF;
- }
+ if(IS_ERR(fid))
+ return PTR_ERR(fid);
err = v9fs_t_stat(v9ses, fid->fid, &fcall);
@@ -831,6 +854,7 @@ v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
}
kfree(fcall);
+ v9fs_fid_clunk(v9ses, fid);
return err;
}
@@ -844,18 +868,14 @@ v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
{
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
- struct v9fs_fid *fid = v9fs_fid_lookup(dentry);
+ struct v9fs_fid *fid = v9fs_fid_clone(dentry);
struct v9fs_fcall *fcall = NULL;
struct v9fs_wstat wstat;
int res = -EPERM;
dprintk(DEBUG_VFS, "\n");
-
- if (!fid) {
- dprintk(DEBUG_ERROR,
- "Couldn't find fid associated with dentry\n");
- return -EBADF;
- }
+ if(IS_ERR(fid))
+ return PTR_ERR(fid);
v9fs_blank_wstat(&wstat);
if (iattr->ia_valid & ATTR_MODE)
@@ -887,6 +907,7 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
if (res >= 0)
res = inode_setattr(dentry->d_inode, iattr);
+ v9fs_fid_clunk(v9ses, fid);
return res;
}
@@ -987,18 +1008,15 @@ static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
struct v9fs_fcall *fcall = NULL;
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
- struct v9fs_fid *fid = v9fs_fid_lookup(dentry);
+ struct v9fs_fid *fid = v9fs_fid_clone(dentry);
- if (!fid) {
- dprintk(DEBUG_ERROR, "could not resolve fid from dentry\n");
- retval = -EBADF;
- goto FreeFcall;
- }
+ if(IS_ERR(fid))
+ return PTR_ERR(fid);
if (!v9ses->extended) {
retval = -EBADF;
dprintk(DEBUG_ERROR, "not extended\n");
- goto FreeFcall;
+ goto ClunkFid;
}
dprintk(DEBUG_VFS, " %s\n", dentry->d_name.name);
@@ -1009,8 +1027,10 @@ static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
goto FreeFcall;
}
- if (!fcall)
- return -EIO;
+ if (!fcall) {
+ retval = -EIO;
+ goto ClunkFid;
+ }
if (!(fcall->params.rstat.stat.mode & V9FS_DMSYMLINK)) {
retval = -EINVAL;
@@ -1028,9 +1048,12 @@ static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
fcall->params.rstat.stat.extension.str, buffer);
retval = buflen;
- FreeFcall:
+FreeFcall:
kfree(fcall);
+ClunkFid:
+ v9fs_fid_clunk(v9ses, fid);
+
return retval;
}
@@ -1123,52 +1146,58 @@ static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
int err;
u32 fid, perm;
struct v9fs_session_info *v9ses;
- struct v9fs_fid *dfid, *vfid;
- struct inode *inode;
+ struct v9fs_fid *dfid, *vfid = NULL;
+ struct inode *inode = NULL;
- inode = NULL;
- vfid = NULL;
v9ses = v9fs_inode2v9ses(dir);
- dfid = v9fs_fid_lookup(dentry->d_parent);
- perm = unixmode2p9mode(v9ses, mode);
-
if (!v9ses->extended) {
dprintk(DEBUG_ERROR, "not extended\n");
return -EPERM;
}
+ dfid = v9fs_fid_clone(dentry->d_parent);
+ if(IS_ERR(dfid)) {
+ err = PTR_ERR(dfid);
+ goto error;
+ }
+
+ perm = unixmode2p9mode(v9ses, mode);
+
err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name,
perm, V9FS_OREAD, (char *) extension, &fid, NULL, NULL);
if (err)
- goto error;
+ goto clunk_dfid;
err = v9fs_t_clunk(v9ses, fid);
if (err)
- goto error;
+ goto clunk_dfid;
vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry);
if (IS_ERR(vfid)) {
err = PTR_ERR(vfid);
vfid = NULL;
- goto error;
+ goto clunk_dfid;
}
inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
inode = NULL;
- goto error;
+ goto free_vfid;
}
dentry->d_op = &v9fs_dentry_operations;
d_instantiate(dentry, inode);
return 0;
-error:
- if (vfid)
- v9fs_fid_destroy(vfid);
+free_vfid:
+ v9fs_fid_destroy(vfid);
+
+clunk_dfid:
+ v9fs_fid_clunk(v9ses, dfid);
+error:
return err;
}
@@ -1209,26 +1238,29 @@ v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
int retval;
+ struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
struct v9fs_fid *oldfid;
char *name;
dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
old_dentry->d_name.name);
- oldfid = v9fs_fid_lookup(old_dentry);
- if (!oldfid) {
- dprintk(DEBUG_ERROR, "can't find oldfid\n");
- return -EPERM;
- }
+ oldfid = v9fs_fid_clone(old_dentry);
+ if(IS_ERR(oldfid))
+ return PTR_ERR(oldfid);
name = __getname();
- if (unlikely(!name))
- return -ENOMEM;
+ if (unlikely(!name)) {
+ retval = -ENOMEM;
+ goto clunk_fid;
+ }
sprintf(name, "%d\n", oldfid->fid);
retval = v9fs_vfs_mkspecial(dir, dentry, V9FS_DMLINK, name);
__putname(name);
+clunk_fid:
+ v9fs_fid_clunk(v9ses, oldfid);
return retval;
}
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 7cb28720f90e..669dbe5b0317 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -682,6 +682,15 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
retval = PTR_ERR(interpreter);
if (IS_ERR(interpreter))
goto out_free_interp;
+
+ /*
+ * If the binary is not readable then enforce
+ * mm->dumpable = 0 regardless of the interpreter's
+ * permissions.
+ */
+ if (file_permission(interpreter, MAY_READ) < 0)
+ bprm->interp_flags |= BINPRM_FLAGS_ENFORCE_NONDUMP;
+
retval = kernel_read(interpreter, 0, bprm->buf,
BINPRM_BUF_SIZE);
if (retval != BINPRM_BUF_SIZE) {
@@ -1178,6 +1187,10 @@ static int dump_seek(struct file *file, loff_t off)
*/
static int maydump(struct vm_area_struct *vma)
{
+ /* The vma can be set up to tell us the answer directly. */
+ if (vma->vm_flags & VM_ALWAYSDUMP)
+ return 1;
+
/* Do not dump I/O mapped devices or special mappings */
if (vma->vm_flags & (VM_IO | VM_RESERVED))
return 0;
@@ -1424,6 +1437,32 @@ static int elf_dump_thread_status(long signr, struct elf_thread_status *t)
return sz;
}
+static struct vm_area_struct *first_vma(struct task_struct *tsk,
+ struct vm_area_struct *gate_vma)
+{
+ struct vm_area_struct *ret = tsk->mm->mmap;
+
+ if (ret)
+ return ret;
+ return gate_vma;
+}
+/*
+ * Helper function for iterating across a vma list. It ensures that the caller
+ * will visit `gate_vma' prior to terminating the search.
+ */
+static struct vm_area_struct *next_vma(struct vm_area_struct *this_vma,
+ struct vm_area_struct *gate_vma)
+{
+ struct vm_area_struct *ret;
+
+ ret = this_vma->vm_next;
+ if (ret)
+ return ret;
+ if (this_vma == gate_vma)
+ return NULL;
+ return gate_vma;
+}
+
/*
* Actual dumper
*
@@ -1439,7 +1478,7 @@ static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file)
int segs;
size_t size = 0;
int i;
- struct vm_area_struct *vma;
+ struct vm_area_struct *vma, *gate_vma;
struct elfhdr *elf = NULL;
loff_t offset = 0, dataoff, foffset;
unsigned long limit = current->signal->rlim[RLIMIT_CORE].rlim_cur;
@@ -1525,6 +1564,10 @@ static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file)
segs += ELF_CORE_EXTRA_PHDRS;
#endif
+ gate_vma = get_gate_vma(current);
+ if (gate_vma != NULL)
+ segs++;
+
/* Set up header */
fill_elf_header(elf, segs + 1); /* including notes section */
@@ -1592,7 +1635,8 @@ static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file)
dataoff = offset = roundup(offset, ELF_EXEC_PAGESIZE);
/* Write program headers for segments dump */
- for (vma = current->mm->mmap; vma != NULL; vma = vma->vm_next) {
+ for (vma = first_vma(current, gate_vma); vma != NULL;
+ vma = next_vma(vma, gate_vma)) {
struct elf_phdr phdr;
size_t sz;
@@ -1641,7 +1685,8 @@ static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file)
/* Align to page */
DUMP_SEEK(dataoff - foffset);
- for (vma = current->mm->mmap; vma != NULL; vma = vma->vm_next) {
+ for (vma = first_vma(current, gate_vma); vma != NULL;
+ vma = next_vma(vma, gate_vma)) {
unsigned long addr;
if (!maydump(vma))
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index 6e6d4568d548..a4d933a51208 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -234,6 +234,14 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm,
goto error;
}
+ /*
+ * If the binary is not readable then enforce
+ * mm->dumpable = 0 regardless of the interpreter's
+ * permissions.
+ */
+ if (file_permission(interpreter, MAY_READ) < 0)
+ bprm->interp_flags |= BINPRM_FLAGS_ENFORCE_NONDUMP;
+
retval = kernel_read(interpreter, 0, bprm->buf,
BINPRM_BUF_SIZE);
if (retval < 0)
diff --git a/fs/buffer.c b/fs/buffer.c
index 3b116078b4c3..460f1c43238e 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2834,7 +2834,7 @@ int try_to_free_buffers(struct page *page)
int ret = 0;
BUG_ON(!PageLocked(page));
- if (PageDirty(page) || PageWriteback(page))
+ if (PageWriteback(page))
return 0;
if (mapping == NULL) { /* can this still happen? */
@@ -2845,6 +2845,19 @@ int try_to_free_buffers(struct page *page)
spin_lock(&mapping->private_lock);
ret = drop_buffers(page, &buffers_to_free);
spin_unlock(&mapping->private_lock);
+
+ /*
+ * If the filesystem writes its buffers by hand (eg ext3)
+ * then we can have clean buffers against a dirty page. We
+ * clean the page here; otherwise the VM will never notice
+ * that the filesystem did any IO at all.
+ *
+ * Also, during truncate, discard_buffer will have marked all
+ * the page's buffers clean. We discover that here and clean
+ * the page also.
+ */
+ if (ret)
+ cancel_dirty_page(page, PAGE_CACHE_SIZE);
out:
if (buffers_to_free) {
struct buffer_head *bh = buffers_to_free;
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index c403b66ec83c..a4b142a6a2c7 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -251,8 +251,19 @@ __writeback_single_inode(struct inode *inode, struct writeback_control *wbc)
WARN_ON(inode->i_state & I_WILL_FREE);
if ((wbc->sync_mode != WB_SYNC_ALL) && (inode->i_state & I_LOCK)) {
+ struct address_space *mapping = inode->i_mapping;
+ int ret;
+
list_move(&inode->i_list, &inode->i_sb->s_dirty);
- return 0;
+
+ /*
+ * Even if we don't actually write the inode itself here,
+ * we can at least start some of the data writeout..
+ */
+ spin_unlock(&inode_lock);
+ ret = do_writepages(mapping, wbc);
+ spin_lock(&inode_lock);
+ return ret;
}
/*
diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c
index 277df40f098d..e695660921ec 100644
--- a/fs/nfsd/nfs3xdr.c
+++ b/fs/nfsd/nfs3xdr.c
@@ -990,15 +990,16 @@ encode_entry(struct readdir_cd *ccd, const char *name,
}
int
-nfs3svc_encode_entry(struct readdir_cd *cd, const char *name,
- int namlen, loff_t offset, ino_t ino, unsigned int d_type)
+nfs3svc_encode_entry(void *cd, const char *name,
+ int namlen, loff_t offset, u64 ino, unsigned int d_type)
{
return encode_entry(cd, name, namlen, offset, ino, d_type, 0);
}
int
-nfs3svc_encode_entry_plus(struct readdir_cd *cd, const char *name,
- int namlen, loff_t offset, ino_t ino, unsigned int d_type)
+nfs3svc_encode_entry_plus(void *cd, const char *name,
+ int namlen, loff_t offset, u64 ino,
+ unsigned int d_type)
{
return encode_entry(cd, name, namlen, offset, ino, d_type, 1);
}
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index fea46368afb2..18aa9440df14 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -1880,9 +1880,10 @@ nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
}
static int
-nfsd4_encode_dirent(struct readdir_cd *ccd, const char *name, int namlen,
- loff_t offset, ino_t ino, unsigned int d_type)
+nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
+ loff_t offset, u64 ino, unsigned int d_type)
{
+ struct readdir_cd *ccd = ccdv;
struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
int buflen;
__be32 *p = cd->buffer;
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 0aaccb03bf76..fbf5d51947ea 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -72,7 +72,7 @@ static struct svc_program nfsd_acl_program = {
.pg_prog = NFS_ACL_PROGRAM,
.pg_nvers = NFSD_ACL_NRVERS,
.pg_vers = nfsd_acl_versions,
- .pg_name = "nfsd",
+ .pg_name = "nfsacl",
.pg_class = "nfsd",
.pg_stats = &nfsd_acl_svcstats,
.pg_authenticate = &svc_set_client,
@@ -118,16 +118,16 @@ int nfsd_vers(int vers, enum vers_op change)
switch(change) {
case NFSD_SET:
nfsd_versions[vers] = nfsd_version[vers];
- break;
#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
if (vers < NFSD_ACL_NRVERS)
- nfsd_acl_version[vers] = nfsd_acl_version[vers];
+ nfsd_acl_versions[vers] = nfsd_acl_version[vers];
#endif
+ break;
case NFSD_CLEAR:
nfsd_versions[vers] = NULL;
#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
if (vers < NFSD_ACL_NRVERS)
- nfsd_acl_version[vers] = NULL;
+ nfsd_acl_versions[vers] = NULL;
#endif
break;
case NFSD_TEST:
diff --git a/fs/nfsd/nfsxdr.c b/fs/nfsd/nfsxdr.c
index f5243f943996..6555c50d9006 100644
--- a/fs/nfsd/nfsxdr.c
+++ b/fs/nfsd/nfsxdr.c
@@ -462,9 +462,10 @@ nfssvc_encode_statfsres(struct svc_rqst *rqstp, __be32 *p,
}
int
-nfssvc_encode_entry(struct readdir_cd *ccd, const char *name,
- int namlen, loff_t offset, ino_t ino, unsigned int d_type)
+nfssvc_encode_entry(void *ccdv, const char *name,
+ int namlen, loff_t offset, u64 ino, unsigned int d_type)
{
+ struct readdir_cd *ccd = ccdv;
struct nfsd_readdirres *cd = container_of(ccd, struct nfsd_readdirres, common);
__be32 *p = cd->buffer;
int buflen, slen;
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 7a79c23aa6d4..5d32e5fa697e 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -822,7 +822,8 @@ nfsd_read_actor(read_descriptor_t *desc, struct page *page, unsigned long offset
rqstp->rq_res.page_len = size;
} else if (page != pp[-1]) {
get_page(page);
- put_page(*pp);
+ if (*pp)
+ put_page(*pp);
*pp = page;
rqstp->rq_resused++;
rqstp->rq_res.page_len += size;
@@ -1244,7 +1245,6 @@ nfsd_create_v3(struct svc_rqst *rqstp, struct svc_fh *fhp,
__be32 err;
int host_err;
__u32 v_mtime=0, v_atime=0;
- int v_mode=0;
err = nfserr_perm;
if (!flen)
@@ -1281,16 +1281,11 @@ nfsd_create_v3(struct svc_rqst *rqstp, struct svc_fh *fhp,
goto out;
if (createmode == NFS3_CREATE_EXCLUSIVE) {
- /* while the verifier would fit in mtime+atime,
- * solaris7 gets confused (bugid 4218508) if these have
- * the high bit set, so we use the mode as well
+ /* solaris7 gets confused (bugid 4218508) if these have
+ * the high bit set, so just clear the high bits.
*/
v_mtime = verifier[0]&0x7fffffff;
v_atime = verifier[1]&0x7fffffff;
- v_mode = S_IFREG
- | ((verifier[0]&0x80000000) >> (32-7)) /* u+x */
- | ((verifier[1]&0x80000000) >> (32-9)) /* u+r */
- ;
}
if (dchild->d_inode) {
@@ -1318,7 +1313,6 @@ nfsd_create_v3(struct svc_rqst *rqstp, struct svc_fh *fhp,
case NFS3_CREATE_EXCLUSIVE:
if ( dchild->d_inode->i_mtime.tv_sec == v_mtime
&& dchild->d_inode->i_atime.tv_sec == v_atime
- && dchild->d_inode->i_mode == v_mode
&& dchild->d_inode->i_size == 0 )
break;
/* fallthru */
@@ -1340,26 +1334,22 @@ nfsd_create_v3(struct svc_rqst *rqstp, struct svc_fh *fhp,
}
if (createmode == NFS3_CREATE_EXCLUSIVE) {
- /* Cram the verifier into atime/mtime/mode */
+ /* Cram the verifier into atime/mtime */
iap->ia_valid = ATTR_MTIME|ATTR_ATIME
- | ATTR_MTIME_SET|ATTR_ATIME_SET
- | ATTR_MODE;
+ | ATTR_MTIME_SET|ATTR_ATIME_SET;
/* XXX someone who knows this better please fix it for nsec */
iap->ia_mtime.tv_sec = v_mtime;
iap->ia_atime.tv_sec = v_atime;
iap->ia_mtime.tv_nsec = 0;
iap->ia_atime.tv_nsec = 0;
- iap->ia_mode = v_mode;
}
/* Set file attributes.
- * Mode has already been set but we might need to reset it
- * for CREATE_EXCLUSIVE
* Irix appears to send along the gid when it tries to
* implement setgid directories via NFS. Clear out all that cruft.
*/
set_attr:
- if ((iap->ia_valid &= ~(ATTR_UID|ATTR_GID)) != 0) {
+ if ((iap->ia_valid &= ~(ATTR_UID|ATTR_GID|ATTR_MODE)) != 0) {
__be32 err2 = nfsd_setattr(rqstp, resfhp, iap, 0, (time_t)0);
if (err2)
err = err2;
@@ -1726,7 +1716,7 @@ out:
*/
__be32
nfsd_readdir(struct svc_rqst *rqstp, struct svc_fh *fhp, loff_t *offsetp,
- struct readdir_cd *cdp, encode_dent_fn func)
+ struct readdir_cd *cdp, filldir_t func)
{
__be32 err;
int host_err;
@@ -1751,7 +1741,7 @@ nfsd_readdir(struct svc_rqst *rqstp, struct svc_fh *fhp, loff_t *offsetp,
do {
cdp->err = nfserr_eof; /* will be cleared on successful read */
- host_err = vfs_readdir(file, (filldir_t) func, cdp);
+ host_err = vfs_readdir(file, func, cdp);
} while (host_err >=0 && cdp->err == nfs_ok);
if (host_err)
err = nfserrno(host_err);
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 77a57b5799c4..ff7a66850602 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -371,9 +371,11 @@ static int mounts_open(struct inode *inode, struct file *file)
if (task) {
task_lock(task);
- ns = task->nsproxy->mnt_ns;
- if (ns)
- get_mnt_ns(ns);
+ if (task->nsproxy) {
+ ns = task->nsproxy->mnt_ns;
+ if (ns)
+ get_mnt_ns(ns);
+ }
task_unlock(task);
put_task_struct(task);
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-06 08:40:58 +0000