From 956ce2083c93c6ce0a8504d000746b1bea4fe111 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 17 May 2013 21:22:31 -0400 Subject: [PATCH] [readdir] convert ntfs Signed-off-by: Al Viro --- fs/ntfs/dir.c | 84 +++++++++++++++++---------------------------------- 1 file changed, 27 insertions(+), 57 deletions(-) diff --git a/fs/ntfs/dir.c b/fs/ntfs/dir.c index aa411c3f20e9..9e38dafa3bc7 100644 --- a/fs/ntfs/dir.c +++ b/fs/ntfs/dir.c @@ -1004,13 +1004,11 @@ dir_err_out: /** * ntfs_filldir - ntfs specific filldir method * @vol: current ntfs volume - * @fpos: position in the directory * @ndir: ntfs inode of current directory * @ia_page: page in which the index allocation buffer @ie is in resides * @ie: current index entry * @name: buffer to use for the converted name - * @dirent: vfs filldir callback context - * @filldir: vfs filldir callback + * @actor: what to feed the entries to * * Convert the Unicode @name to the loaded NLS and pass it to the @filldir * callback. @@ -1024,12 +1022,12 @@ dir_err_out: * retake the lock if we are returning a non-zero value as ntfs_readdir() * would need to drop the lock immediately anyway. */ -static inline int ntfs_filldir(ntfs_volume *vol, loff_t fpos, +static inline int ntfs_filldir(ntfs_volume *vol, ntfs_inode *ndir, struct page *ia_page, INDEX_ENTRY *ie, - u8 *name, void *dirent, filldir_t filldir) + u8 *name, struct dir_context *actor) { unsigned long mref; - int name_len, rc; + int name_len; unsigned dt_type; FILE_NAME_TYPE_FLAGS name_type; @@ -1068,13 +1066,14 @@ static inline int ntfs_filldir(ntfs_volume *vol, loff_t fpos, if (ia_page) unlock_page(ia_page); ntfs_debug("Calling filldir for %s with len %i, fpos 0x%llx, inode " - "0x%lx, DT_%s.", name, name_len, fpos, mref, + "0x%lx, DT_%s.", name, name_len, actor->pos, mref, dt_type == DT_DIR ? "DIR" : "REG"); - rc = filldir(dirent, name, name_len, fpos, mref, dt_type); + if (!dir_emit(actor, name, name_len, mref, dt_type)) + return 1; /* Relock the page but not if we are aborting ->readdir. */ - if (!rc && ia_page) + if (ia_page) lock_page(ia_page); - return rc; + return 0; } /* @@ -1097,11 +1096,11 @@ static inline int ntfs_filldir(ntfs_volume *vol, loff_t fpos, * removes them again after the write is complete after which it * unlocks the page. */ -static int ntfs_readdir(struct file *filp, void *dirent, filldir_t filldir) +static int ntfs_readdir(struct file *file, struct dir_context *actor) { s64 ia_pos, ia_start, prev_ia_pos, bmp_pos; - loff_t fpos, i_size; - struct inode *bmp_vi, *vdir = file_inode(filp); + loff_t i_size; + struct inode *bmp_vi, *vdir = file_inode(file); struct super_block *sb = vdir->i_sb; ntfs_inode *ndir = NTFS_I(vdir); ntfs_volume *vol = NTFS_SB(sb); @@ -1116,33 +1115,16 @@ static int ntfs_readdir(struct file *filp, void *dirent, filldir_t filldir) u8 *kaddr, *bmp, *index_end; ntfs_attr_search_ctx *ctx; - fpos = filp->f_pos; ntfs_debug("Entering for inode 0x%lx, fpos 0x%llx.", - vdir->i_ino, fpos); + vdir->i_ino, actor->pos); rc = err = 0; /* Are we at end of dir yet? */ i_size = i_size_read(vdir); - if (fpos >= i_size + vol->mft_record_size) - goto done; + if (actor->pos >= i_size + vol->mft_record_size) + return 0; /* Emulate . and .. for all directories. */ - if (!fpos) { - ntfs_debug("Calling filldir for . with len 1, fpos 0x0, " - "inode 0x%lx, DT_DIR.", vdir->i_ino); - rc = filldir(dirent, ".", 1, fpos, vdir->i_ino, DT_DIR); - if (rc) - goto done; - fpos++; - } - if (fpos == 1) { - ntfs_debug("Calling filldir for .. with len 2, fpos 0x1, " - "inode 0x%lx, DT_DIR.", - (unsigned long)parent_ino(filp->f_path.dentry)); - rc = filldir(dirent, "..", 2, fpos, - parent_ino(filp->f_path.dentry), DT_DIR); - if (rc) - goto done; - fpos++; - } + if (!dir_emit_dots(file, actor)) + return 0; m = NULL; ctx = NULL; /* @@ -1155,7 +1137,7 @@ static int ntfs_readdir(struct file *filp, void *dirent, filldir_t filldir) goto err_out; } /* Are we jumping straight into the index allocation attribute? */ - if (fpos >= vol->mft_record_size) + if (actor->pos >= vol->mft_record_size) goto skip_index_root; /* Get hold of the mft record for the directory. */ m = map_mft_record(ndir); @@ -1170,7 +1152,7 @@ static int ntfs_readdir(struct file *filp, void *dirent, filldir_t filldir) goto err_out; } /* Get the offset into the index root attribute. */ - ir_pos = (s64)fpos; + ir_pos = (s64)actor->pos; /* Find the index root attribute in the mft record. */ err = ntfs_attr_lookup(AT_INDEX_ROOT, I30, 4, CASE_SENSITIVE, 0, NULL, 0, ctx); @@ -1226,10 +1208,9 @@ static int ntfs_readdir(struct file *filp, void *dirent, filldir_t filldir) if (ir_pos > (u8*)ie - (u8*)ir) continue; /* Advance the position even if going to skip the entry. */ - fpos = (u8*)ie - (u8*)ir; + actor->pos = (u8*)ie - (u8*)ir; /* Submit the name to the filldir callback. */ - rc = ntfs_filldir(vol, fpos, ndir, NULL, ie, name, dirent, - filldir); + rc = ntfs_filldir(vol, ndir, NULL, ie, name, actor); if (rc) { kfree(ir); goto abort; @@ -1242,12 +1223,12 @@ static int ntfs_readdir(struct file *filp, void *dirent, filldir_t filldir) if (!NInoIndexAllocPresent(ndir)) goto EOD; /* Advance fpos to the beginning of the index allocation. */ - fpos = vol->mft_record_size; + actor->pos = vol->mft_record_size; skip_index_root: kaddr = NULL; prev_ia_pos = -1LL; /* Get the offset into the index allocation attribute. */ - ia_pos = (s64)fpos - vol->mft_record_size; + ia_pos = (s64)actor->pos - vol->mft_record_size; ia_mapping = vdir->i_mapping; ntfs_debug("Inode 0x%lx, getting index bitmap.", vdir->i_ino); bmp_vi = ntfs_attr_iget(vdir, AT_BITMAP, I30, 4); @@ -1409,7 +1390,7 @@ find_next_index_buffer: if (ia_pos - ia_start > (u8*)ie - (u8*)ia) continue; /* Advance the position even if going to skip the entry. */ - fpos = (u8*)ie - (u8*)ia + + actor->pos = (u8*)ie - (u8*)ia + (sle64_to_cpu(ia->index_block_vcn) << ndir->itype.index.vcn_size_bits) + vol->mft_record_size; @@ -1419,8 +1400,7 @@ find_next_index_buffer: * before returning, unless a non-zero value is returned in * which case the page is left unlocked. */ - rc = ntfs_filldir(vol, fpos, ndir, ia_page, ie, name, dirent, - filldir); + rc = ntfs_filldir(vol, ndir, ia_page, ie, name, actor); if (rc) { /* @ia_page is already unlocked in this case. */ ntfs_unmap_page(ia_page); @@ -1439,18 +1419,9 @@ unm_EOD: iput(bmp_vi); EOD: /* We are finished, set fpos to EOD. */ - fpos = i_size + vol->mft_record_size; + actor->pos = i_size + vol->mft_record_size; abort: kfree(name); -done: -#ifdef DEBUG - if (!rc) - ntfs_debug("EOD, fpos 0x%llx, returning 0.", fpos); - else - ntfs_debug("filldir returned %i, fpos 0x%llx, returning 0.", - rc, fpos); -#endif - filp->f_pos = fpos; return 0; err_out: if (bmp_page) { @@ -1471,7 +1442,6 @@ iput_err_out: if (!err) err = -EIO; ntfs_debug("Failed. Returning error code %i.", -err); - filp->f_pos = fpos; return err; } @@ -1571,7 +1541,7 @@ static int ntfs_dir_fsync(struct file *filp, loff_t start, loff_t end, const struct file_operations ntfs_dir_ops = { .llseek = generic_file_llseek, /* Seek inside directory. */ .read = generic_read_dir, /* Return -EISDIR. */ - .readdir = ntfs_readdir, /* Read directory contents. */ + .iterate = ntfs_readdir, /* Read directory contents. */ #ifdef NTFS_RW .fsync = ntfs_dir_fsync, /* Sync a directory to disk. */ /*.aio_fsync = ,*/ /* Sync all outstanding async -- 2.20.1