Merge branch 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6
* 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6: NFS: Ensure we return the dirent->d_type when it is known NFS: Correct the array bound calculation in nfs_readdir_add_to_array NFS: Don't ignore errors from nfs_do_filldir() NFS: Fix the error handling in "uncached_readdir()" NFS: Fix a page leak in uncached_readdir() NFS: Fix a page leak in nfs_do_filldir() NFS: Assume eof if the server returns no readdir records NFS: Buffer overflow in ->decode_dirent() should not be fatal Pure nfs client performance using odirect. SUNRPC: Fix an infinite loop in call_refresh/call_refreshresult
This commit is contained in:
Коммит
19650e8580
64
fs/nfs/dir.c
64
fs/nfs/dir.c
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@ -162,6 +162,7 @@ struct nfs_cache_array_entry {
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u64 cookie;
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u64 ino;
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struct qstr string;
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unsigned char d_type;
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};
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struct nfs_cache_array {
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@ -171,8 +172,6 @@ struct nfs_cache_array {
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struct nfs_cache_array_entry array[0];
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};
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#define MAX_READDIR_ARRAY ((PAGE_SIZE - sizeof(struct nfs_cache_array)) / sizeof(struct nfs_cache_array_entry))
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typedef __be32 * (*decode_dirent_t)(struct xdr_stream *, struct nfs_entry *, struct nfs_server *, int);
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typedef struct {
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struct file *file;
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@ -257,13 +256,17 @@ int nfs_readdir_add_to_array(struct nfs_entry *entry, struct page *page)
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if (IS_ERR(array))
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return PTR_ERR(array);
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ret = -ENOSPC;
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if (array->size >= MAX_READDIR_ARRAY)
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goto out;
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cache_entry = &array->array[array->size];
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/* Check that this entry lies within the page bounds */
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ret = -ENOSPC;
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if ((char *)&cache_entry[1] - (char *)page_address(page) > PAGE_SIZE)
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goto out;
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cache_entry->cookie = entry->prev_cookie;
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cache_entry->ino = entry->ino;
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cache_entry->d_type = entry->d_type;
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ret = nfs_readdir_make_qstr(&cache_entry->string, entry->name, entry->len);
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if (ret)
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goto out;
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@ -466,8 +469,9 @@ int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *en
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struct xdr_stream stream;
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struct xdr_buf buf;
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__be32 *ptr = xdr_page;
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int status;
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struct nfs_cache_array *array;
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unsigned int count = 0;
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int status;
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buf.head->iov_base = xdr_page;
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buf.head->iov_len = buflen;
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@ -488,6 +492,8 @@ int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *en
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break;
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}
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count++;
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if (desc->plus == 1)
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nfs_prime_dcache(desc->file->f_path.dentry, entry);
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@ -496,13 +502,14 @@ int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *en
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break;
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} while (!entry->eof);
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if (status == -EBADCOOKIE && entry->eof) {
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if (count == 0 || (status == -EBADCOOKIE && entry->eof == 1)) {
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array = nfs_readdir_get_array(page);
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if (!IS_ERR(array)) {
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array->eof_index = array->size;
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status = 0;
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nfs_readdir_release_array(page);
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}
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} else
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status = PTR_ERR(array);
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}
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return status;
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}
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@ -696,21 +703,23 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent,
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int i = 0;
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int res = 0;
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struct nfs_cache_array *array = NULL;
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unsigned int d_type = DT_UNKNOWN;
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struct dentry *dentry = NULL;
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array = nfs_readdir_get_array(desc->page);
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if (IS_ERR(array))
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return PTR_ERR(array);
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if (IS_ERR(array)) {
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res = PTR_ERR(array);
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goto out;
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}
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for (i = desc->cache_entry_index; i < array->size; i++) {
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d_type = DT_UNKNOWN;
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struct nfs_cache_array_entry *ent;
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res = filldir(dirent, array->array[i].string.name,
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array->array[i].string.len, file->f_pos,
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nfs_compat_user_ino64(array->array[i].ino), d_type);
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if (res < 0)
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ent = &array->array[i];
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if (filldir(dirent, ent->string.name, ent->string.len,
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file->f_pos, nfs_compat_user_ino64(ent->ino),
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ent->d_type) < 0) {
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desc->eof = 1;
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break;
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}
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file->f_pos++;
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desc->cache_entry_index = i;
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if (i < (array->size-1))
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@ -722,9 +731,8 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent,
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desc->eof = 1;
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nfs_readdir_release_array(desc->page);
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out:
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cache_page_release(desc);
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if (dentry != NULL)
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dput(dentry);
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dfprintk(DIRCACHE, "NFS: nfs_do_filldir() filling ended @ cookie %Lu; returning = %d\n",
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(unsigned long long)*desc->dir_cookie, res);
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return res;
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@ -759,13 +767,13 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent,
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goto out;
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}
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if (nfs_readdir_xdr_to_array(desc, page, inode) == -1) {
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status = -EIO;
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goto out_release;
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}
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desc->page_index = 0;
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desc->page = page;
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status = nfs_readdir_xdr_to_array(desc, page, inode);
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if (status < 0)
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goto out_release;
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status = nfs_do_filldir(desc, dirent, filldir);
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out:
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@ -816,14 +824,14 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
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res = readdir_search_pagecache(desc);
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if (res == -EBADCOOKIE) {
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res = 0;
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/* This means either end of directory */
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if (*desc->dir_cookie && desc->eof == 0) {
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/* Or that the server has 'lost' a cookie */
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res = uncached_readdir(desc, dirent, filldir);
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if (res >= 0)
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if (res == 0)
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continue;
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}
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res = 0;
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break;
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}
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if (res == -ETOOSMALL && desc->plus) {
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@ -838,10 +846,8 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
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break;
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res = nfs_do_filldir(desc, dirent, filldir);
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if (res < 0) {
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res = 0;
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if (res < 0)
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break;
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}
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}
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out:
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nfs_unblock_sillyrename(dentry);
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@ -867,7 +867,7 @@ static ssize_t nfs_direct_write(struct kiocb *iocb, const struct iovec *iov,
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goto out;
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nfs_alloc_commit_data(dreq);
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if (dreq->commit_data == NULL || count < wsize)
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if (dreq->commit_data == NULL || count <= wsize)
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sync = NFS_FILE_SYNC;
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dreq->inode = inode;
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@ -361,6 +361,15 @@ unsigned int nfs_page_length(struct page *page)
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return 0;
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}
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/*
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* Convert a umode to a dirent->d_type
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*/
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static inline
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unsigned char nfs_umode_to_dtype(umode_t mode)
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{
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return (mode >> 12) & 15;
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}
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/*
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* Determine the number of pages in an array of length 'len' and
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* with a base offset of 'base'
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@ -485,6 +485,8 @@ nfs_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, struct nfs_se
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entry->prev_cookie = entry->cookie;
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entry->cookie = ntohl(*p++);
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entry->d_type = DT_UNKNOWN;
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p = xdr_inline_peek(xdr, 8);
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if (p != NULL)
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entry->eof = !p[0] && p[1];
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@ -495,7 +497,7 @@ nfs_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, struct nfs_se
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out_overflow:
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print_overflow_msg(__func__, xdr);
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return ERR_PTR(-EIO);
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return ERR_PTR(-EAGAIN);
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}
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/*
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@ -622,11 +622,13 @@ nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, struct nfs_s
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entry->prev_cookie = entry->cookie;
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p = xdr_decode_hyper(p, &entry->cookie);
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entry->d_type = DT_UNKNOWN;
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if (plus) {
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entry->fattr->valid = 0;
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p = xdr_decode_post_op_attr_stream(xdr, entry->fattr);
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if (IS_ERR(p))
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goto out_overflow_exit;
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entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
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/* In fact, a post_op_fh3: */
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p = xdr_inline_decode(xdr, 4);
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if (unlikely(!p))
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@ -656,7 +658,7 @@ nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, struct nfs_s
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out_overflow:
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print_overflow_msg(__func__, xdr);
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out_overflow_exit:
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return ERR_PTR(-EIO);
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return ERR_PTR(-EAGAIN);
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}
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/*
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@ -6208,6 +6208,10 @@ __be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
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if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
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entry->ino = entry->fattr->fileid;
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entry->d_type = DT_UNKNOWN;
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if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE)
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entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
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if (verify_attr_len(xdr, p, len) < 0)
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goto out_overflow;
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@ -6221,7 +6225,7 @@ __be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
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out_overflow:
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print_overflow_msg(__func__, xdr);
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return ERR_PTR(-EIO);
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return ERR_PTR(-EAGAIN);
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}
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/*
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@ -483,6 +483,7 @@ struct nfs_entry {
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int eof;
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struct nfs_fh * fh;
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struct nfs_fattr * fattr;
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unsigned char d_type;
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};
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/*
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@ -989,20 +989,26 @@ call_refreshresult(struct rpc_task *task)
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dprint_status(task);
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task->tk_status = 0;
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task->tk_action = call_allocate;
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if (status >= 0 && rpcauth_uptodatecred(task))
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return;
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task->tk_action = call_refresh;
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switch (status) {
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case -EACCES:
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rpc_exit(task, -EACCES);
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return;
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case -ENOMEM:
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rpc_exit(task, -ENOMEM);
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case 0:
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if (rpcauth_uptodatecred(task))
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task->tk_action = call_allocate;
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return;
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case -ETIMEDOUT:
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rpc_delay(task, 3*HZ);
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case -EAGAIN:
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status = -EACCES;
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if (!task->tk_cred_retry)
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break;
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task->tk_cred_retry--;
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dprintk("RPC: %5u %s: retry refresh creds\n",
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task->tk_pid, __func__);
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return;
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}
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task->tk_action = call_refresh;
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dprintk("RPC: %5u %s: refresh creds failed with error %d\n",
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task->tk_pid, __func__, status);
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rpc_exit(task, status);
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}
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/*
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