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authorGreg Kroah-Hartman <gregkh@suse.de>2006-08-24 22:29:46 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2006-08-24 22:29:46 -0700
commit62250b3bb596ffbae17c4b3d865fecd6329ce8b3 (patch)
tree8f18da918c319a1f0be6c4011b60091bb29dc007 /fs
parent428a7e3e46a465a6cfe7ccbe15d7ea03a043a95a (diff)
parenta969fd5a4e162c4485ae8f3e49d674656a18fa36 (diff)
Merge branch 'fixes' of git://git.linux-nfs.org/pub/linux/nfs-2.6
Diffstat (limited to 'fs')
-rw-r--r--fs/exec.c8
-rw-r--r--fs/lockd/svcsubs.c15
-rw-r--r--fs/namei.c11
-rw-r--r--fs/nfs/file.c8
-rw-r--r--fs/nfs/idmap.c4
-rw-r--r--fs/nfs/nfs4proc.c29
-rw-r--r--fs/nfs/nfs4xdr.c21
-rw-r--r--fs/nfs/read.c23
8 files changed, 80 insertions, 39 deletions
diff --git a/fs/exec.c b/fs/exec.c
index 8344ba73a2a6..f7aabfeca033 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -486,8 +486,6 @@ struct file *open_exec(const char *name)
if (!(nd.mnt->mnt_flags & MNT_NOEXEC) &&
S_ISREG(inode->i_mode)) {
int err = vfs_permission(&nd, MAY_EXEC);
- if (!err && !(inode->i_mode & 0111))
- err = -EACCES;
file = ERR_PTR(err);
if (!err) {
file = nameidata_to_filp(&nd, O_RDONLY);
@@ -922,12 +920,6 @@ int prepare_binprm(struct linux_binprm *bprm)
int retval;
mode = inode->i_mode;
- /*
- * Check execute perms again - if the caller has CAP_DAC_OVERRIDE,
- * generic_permission lets a non-executable through
- */
- if (!(mode & 0111)) /* with at least _one_ execute bit set */
- return -EACCES;
if (bprm->file->f_op == NULL)
return -EACCES;
diff --git a/fs/lockd/svcsubs.c b/fs/lockd/svcsubs.c
index 2a4df9b3779a..01b4db9e5466 100644
--- a/fs/lockd/svcsubs.c
+++ b/fs/lockd/svcsubs.c
@@ -237,19 +237,22 @@ static int
nlm_traverse_files(struct nlm_host *host, int action)
{
struct nlm_file *file, **fp;
- int i;
+ int i, ret = 0;
mutex_lock(&nlm_file_mutex);
for (i = 0; i < FILE_NRHASH; i++) {
fp = nlm_files + i;
while ((file = *fp) != NULL) {
+ file->f_count++;
+ mutex_unlock(&nlm_file_mutex);
+
/* Traverse locks, blocks and shares of this file
* and update file->f_locks count */
- if (nlm_inspect_file(host, file, action)) {
- mutex_unlock(&nlm_file_mutex);
- return 1;
- }
+ if (nlm_inspect_file(host, file, action))
+ ret = 1;
+ mutex_lock(&nlm_file_mutex);
+ file->f_count--;
/* No more references to this file. Let go of it. */
if (!file->f_blocks && !file->f_locks
&& !file->f_shares && !file->f_count) {
@@ -262,7 +265,7 @@ nlm_traverse_files(struct nlm_host *host, int action)
}
}
mutex_unlock(&nlm_file_mutex);
- return 0;
+ return ret;
}
/*
diff --git a/fs/namei.c b/fs/namei.c
index 55a131230f94..432d6bc6fab0 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -227,10 +227,10 @@ int generic_permission(struct inode *inode, int mask,
int permission(struct inode *inode, int mask, struct nameidata *nd)
{
+ umode_t mode = inode->i_mode;
int retval, submask;
if (mask & MAY_WRITE) {
- umode_t mode = inode->i_mode;
/*
* Nobody gets write access to a read-only fs.
@@ -247,6 +247,13 @@ int permission(struct inode *inode, int mask, struct nameidata *nd)
}
+ /*
+ * MAY_EXEC on regular files requires special handling: We override
+ * filesystem execute permissions if the mode bits aren't set.
+ */
+ if ((mask & MAY_EXEC) && S_ISREG(mode) && !(mode & S_IXUGO))
+ return -EACCES;
+
/* Ordinary permission routines do not understand MAY_APPEND. */
submask = mask & ~MAY_APPEND;
if (inode->i_op && inode->i_op->permission)
@@ -1767,6 +1774,8 @@ struct dentry *lookup_create(struct nameidata *nd, int is_dir)
if (nd->last_type != LAST_NORM)
goto fail;
nd->flags &= ~LOOKUP_PARENT;
+ nd->flags |= LOOKUP_CREATE;
+ nd->intent.open.flags = O_EXCL;
/*
* Do the final lookup.
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index cc2b874ad5a4..48e892880d5b 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -312,7 +312,13 @@ static void nfs_invalidate_page(struct page *page, unsigned long offset)
static int nfs_release_page(struct page *page, gfp_t gfp)
{
- return !nfs_wb_page(page->mapping->host, page);
+ if (gfp & __GFP_FS)
+ return !nfs_wb_page(page->mapping->host, page);
+ else
+ /*
+ * Avoid deadlock on nfs_wait_on_request().
+ */
+ return 0;
}
const struct address_space_operations nfs_file_aops = {
diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index b81e7ed3c902..07a5dd57646e 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -130,9 +130,7 @@ nfs_idmap_delete(struct nfs4_client *clp)
if (!idmap)
return;
- dput(idmap->idmap_dentry);
- idmap->idmap_dentry = NULL;
- rpc_unlink(idmap->idmap_path);
+ rpc_unlink(idmap->idmap_dentry);
clp->cl_idmap = NULL;
kfree(idmap);
}
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index e6ee97f19d81..153898e1331f 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2668,7 +2668,7 @@ out:
nfs4_set_cached_acl(inode, acl);
}
-static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
+static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
{
struct page *pages[NFS4ACL_MAXPAGES];
struct nfs_getaclargs args = {
@@ -2721,6 +2721,19 @@ out_free:
return ret;
}
+static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
+{
+ struct nfs4_exception exception = { };
+ ssize_t ret;
+ do {
+ ret = __nfs4_get_acl_uncached(inode, buf, buflen);
+ if (ret >= 0)
+ break;
+ ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
+ } while (exception.retry);
+ return ret;
+}
+
static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
{
struct nfs_server *server = NFS_SERVER(inode);
@@ -2737,7 +2750,7 @@ static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
return nfs4_get_acl_uncached(inode, buf, buflen);
}
-static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
+static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
{
struct nfs_server *server = NFS_SERVER(inode);
struct page *pages[NFS4ACL_MAXPAGES];
@@ -2763,6 +2776,18 @@ static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen
return ret;
}
+static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
+{
+ struct nfs4_exception exception = { };
+ int err;
+ do {
+ err = nfs4_handle_exception(NFS_SERVER(inode),
+ __nfs4_proc_set_acl(inode, buf, buflen),
+ &exception);
+ } while (exception.retry);
+ return err;
+}
+
static int
nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
{
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 1750d996f49f..730ec8fb31c6 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -3355,7 +3355,7 @@ static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct n
struct kvec *iov = rcvbuf->head;
unsigned int nr, pglen = rcvbuf->page_len;
uint32_t *end, *entry, *p, *kaddr;
- uint32_t len, attrlen;
+ uint32_t len, attrlen, xlen;
int hdrlen, recvd, status;
status = decode_op_hdr(xdr, OP_READDIR);
@@ -3377,10 +3377,10 @@ static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct n
BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
kaddr = p = (uint32_t *) kmap_atomic(page, KM_USER0);
- end = (uint32_t *) ((char *)p + pglen + readdir->pgbase);
+ end = p + ((pglen + readdir->pgbase) >> 2);
entry = p;
for (nr = 0; *p++; nr++) {
- if (p + 3 > end)
+ if (end - p < 3)
goto short_pkt;
dprintk("cookie = %Lu, ", *((unsigned long long *)p));
p += 2; /* cookie */
@@ -3389,18 +3389,19 @@ static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct n
printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)\n", len);
goto err_unmap;
}
- dprintk("filename = %*s\n", len, (char *)p);
- p += XDR_QUADLEN(len);
- if (p + 1 > end)
+ xlen = XDR_QUADLEN(len);
+ if (end - p < xlen + 1)
goto short_pkt;
+ dprintk("filename = %*s\n", len, (char *)p);
+ p += xlen;
len = ntohl(*p++); /* bitmap length */
- p += len;
- if (p + 1 > end)
+ if (end - p < len + 1)
goto short_pkt;
+ p += len;
attrlen = XDR_QUADLEN(ntohl(*p++));
- p += attrlen; /* attributes */
- if (p + 2 > end)
+ if (end - p < attrlen + 2)
goto short_pkt;
+ p += attrlen; /* attributes */
entry = p;
}
if (!nr && (entry[0] != 0 || entry[1] == 0))
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index 65c0c5b32351..da9cf11c326f 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -116,10 +116,17 @@ static void nfs_readpage_truncate_uninitialised_page(struct nfs_read_data *data)
pages = &data->args.pages[base >> PAGE_CACHE_SHIFT];
base &= ~PAGE_CACHE_MASK;
pglen = PAGE_CACHE_SIZE - base;
- if (pglen < remainder)
+ for (;;) {
+ if (remainder <= pglen) {
+ memclear_highpage_flush(*pages, base, remainder);
+ break;
+ }
memclear_highpage_flush(*pages, base, pglen);
- else
- memclear_highpage_flush(*pages, base, remainder);
+ pages++;
+ remainder -= pglen;
+ pglen = PAGE_CACHE_SIZE;
+ base = 0;
+ }
}
/*
@@ -476,6 +483,8 @@ static void nfs_readpage_set_pages_uptodate(struct nfs_read_data *data)
unsigned int base = data->args.pgbase;
struct page **pages;
+ if (data->res.eof)
+ count = data->args.count;
if (unlikely(count == 0))
return;
pages = &data->args.pages[base >> PAGE_CACHE_SHIFT];
@@ -483,11 +492,7 @@ static void nfs_readpage_set_pages_uptodate(struct nfs_read_data *data)
count += base;
for (;count >= PAGE_CACHE_SIZE; count -= PAGE_CACHE_SIZE, pages++)
SetPageUptodate(*pages);
- /*
- * Was this an eof or a short read? If the latter, don't mark the page
- * as uptodate yet.
- */
- if (count > 0 && (data->res.eof || data->args.count == data->res.count))
+ if (count != 0)
SetPageUptodate(*pages);
}
@@ -502,6 +507,8 @@ static void nfs_readpage_set_pages_error(struct nfs_read_data *data)
count += base;
for (;count >= PAGE_CACHE_SIZE; count -= PAGE_CACHE_SIZE, pages++)
SetPageError(*pages);
+ if (count != 0)
+ SetPageError(*pages);
}
/*