From 23db862060e05e52363aa872c50e518db9c94f6d Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 17 May 2013 16:34:50 -0400 Subject: [PATCH] [readdir] convert nfs Signed-off-by: Al Viro --- fs/nfs/dir.c | 51 +++++++++++++++++++++++++-------------------------- 1 file changed, 25 insertions(+), 26 deletions(-) diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index e093e73178b7..5d051419527b 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -46,7 +46,7 @@ static int nfs_opendir(struct inode *, struct file *); static int nfs_closedir(struct inode *, struct file *); -static int nfs_readdir(struct file *, void *, filldir_t); +static int nfs_readdir(struct file *, struct dir_context *); static int nfs_fsync_dir(struct file *, loff_t, loff_t, int); static loff_t nfs_llseek_dir(struct file *, loff_t, int); static void nfs_readdir_clear_array(struct page*); @@ -54,7 +54,7 @@ static void nfs_readdir_clear_array(struct page*); const struct file_operations nfs_dir_operations = { .llseek = nfs_llseek_dir, .read = generic_read_dir, - .readdir = nfs_readdir, + .iterate = nfs_readdir, .open = nfs_opendir, .release = nfs_closedir, .fsync = nfs_fsync_dir, @@ -147,6 +147,7 @@ typedef int (*decode_dirent_t)(struct xdr_stream *, struct nfs_entry *, int); typedef struct { struct file *file; struct page *page; + struct dir_context *ctx; unsigned long page_index; u64 *dir_cookie; u64 last_cookie; @@ -252,7 +253,7 @@ out: static int nfs_readdir_search_for_pos(struct nfs_cache_array *array, nfs_readdir_descriptor_t *desc) { - loff_t diff = desc->file->f_pos - desc->current_index; + loff_t diff = desc->ctx->pos - desc->current_index; unsigned int index; if (diff < 0) @@ -289,7 +290,7 @@ int nfs_readdir_search_for_cookie(struct nfs_cache_array *array, nfs_readdir_des || (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA))) { ctx->duped = 0; ctx->attr_gencount = nfsi->attr_gencount; - } else if (new_pos < desc->file->f_pos) { + } else if (new_pos < desc->ctx->pos) { if (ctx->duped > 0 && ctx->dup_cookie == *desc->dir_cookie) { if (printk_ratelimit()) { @@ -307,7 +308,7 @@ int nfs_readdir_search_for_cookie(struct nfs_cache_array *array, nfs_readdir_des ctx->dup_cookie = *desc->dir_cookie; ctx->duped = -1; } - desc->file->f_pos = new_pos; + desc->ctx->pos = new_pos; desc->cache_entry_index = i; return 0; } @@ -405,13 +406,13 @@ different: } static -bool nfs_use_readdirplus(struct inode *dir, struct file *filp) +bool nfs_use_readdirplus(struct inode *dir, struct dir_context *ctx) { if (!nfs_server_capable(dir, NFS_CAP_READDIRPLUS)) return false; if (test_and_clear_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(dir)->flags)) return true; - if (filp->f_pos == 0) + if (ctx->pos == 0) return true; return false; } @@ -702,8 +703,7 @@ int readdir_search_pagecache(nfs_readdir_descriptor_t *desc) * Once we've found the start of the dirent within a page: fill 'er up... */ static -int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent, - filldir_t filldir) +int nfs_do_filldir(nfs_readdir_descriptor_t *desc) { struct file *file = desc->file; int i = 0; @@ -721,13 +721,12 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent, struct nfs_cache_array_entry *ent; ent = &array->array[i]; - if (filldir(dirent, ent->string.name, ent->string.len, - file->f_pos, nfs_compat_user_ino64(ent->ino), - ent->d_type) < 0) { + if (!dir_emit(desc->ctx, ent->string.name, ent->string.len, + nfs_compat_user_ino64(ent->ino), ent->d_type)) { desc->eof = 1; break; } - file->f_pos++; + desc->ctx->pos++; if (i < (array->size-1)) *desc->dir_cookie = array->array[i+1].cookie; else @@ -759,8 +758,7 @@ out: * directory in the page cache by the time we get here. */ static inline -int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent, - filldir_t filldir) +int uncached_readdir(nfs_readdir_descriptor_t *desc) { struct page *page = NULL; int status; @@ -785,7 +783,7 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent, if (status < 0) goto out_release; - status = nfs_do_filldir(desc, dirent, filldir); + status = nfs_do_filldir(desc); out: dfprintk(DIRCACHE, "NFS: %s: returns %d\n", @@ -800,35 +798,36 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent, last cookie cache takes care of the common case of reading the whole directory. */ -static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir) +static int nfs_readdir(struct file *file, struct dir_context *ctx) { - struct dentry *dentry = filp->f_path.dentry; + struct dentry *dentry = file->f_path.dentry; struct inode *inode = dentry->d_inode; nfs_readdir_descriptor_t my_desc, *desc = &my_desc; - struct nfs_open_dir_context *dir_ctx = filp->private_data; + struct nfs_open_dir_context *dir_ctx = file->private_data; int res; dfprintk(FILE, "NFS: readdir(%s/%s) starting at cookie %llu\n", dentry->d_parent->d_name.name, dentry->d_name.name, - (long long)filp->f_pos); + (long long)ctx->pos); nfs_inc_stats(inode, NFSIOS_VFSGETDENTS); /* - * filp->f_pos points to the dirent entry number. + * ctx->pos points to the dirent entry number. * *desc->dir_cookie has the cookie for the next entry. We have * to either find the entry with the appropriate number or * revalidate the cookie. */ memset(desc, 0, sizeof(*desc)); - desc->file = filp; + desc->file = file; + desc->ctx = ctx; desc->dir_cookie = &dir_ctx->dir_cookie; desc->decode = NFS_PROTO(inode)->decode_dirent; - desc->plus = nfs_use_readdirplus(inode, filp) ? 1 : 0; + desc->plus = nfs_use_readdirplus(inode, ctx) ? 1 : 0; nfs_block_sillyrename(dentry); - res = nfs_revalidate_mapping(inode, filp->f_mapping); + res = nfs_revalidate_mapping(inode, file->f_mapping); if (res < 0) goto out; @@ -840,7 +839,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir) /* This means either end of directory */ if (*desc->dir_cookie && desc->eof == 0) { /* Or that the server has 'lost' a cookie */ - res = uncached_readdir(desc, dirent, filldir); + res = uncached_readdir(desc); if (res == 0) continue; } @@ -857,7 +856,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir) if (res < 0) break; - res = nfs_do_filldir(desc, dirent, filldir); + res = nfs_do_filldir(desc); if (res < 0) break; } while (!desc->eof); -- 2.20.1