From 1bbae9f818609959b8ffc0bf61ba8026a7059426 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 22 May 2013 16:31:14 -0400 Subject: [PATCH] [readdir] convert afs Signed-off-by: Al Viro --- fs/afs/dir.c | 99 ++++++++++++++++++++-------------------------------- 1 file changed, 37 insertions(+), 62 deletions(-) diff --git a/fs/afs/dir.c b/fs/afs/dir.c index 7a465ed04444..34494fbead0a 100644 --- a/fs/afs/dir.c +++ b/fs/afs/dir.c @@ -22,7 +22,7 @@ static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags); static int afs_dir_open(struct inode *inode, struct file *file); -static int afs_readdir(struct file *file, void *dirent, filldir_t filldir); +static int afs_readdir(struct file *file, struct dir_context *ctx); static int afs_d_revalidate(struct dentry *dentry, unsigned int flags); static int afs_d_delete(const struct dentry *dentry); static void afs_d_release(struct dentry *dentry); @@ -43,7 +43,7 @@ static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, const struct file_operations afs_dir_file_operations = { .open = afs_dir_open, .release = afs_release, - .readdir = afs_readdir, + .iterate = afs_readdir, .lock = afs_lock, .llseek = generic_file_llseek, }; @@ -119,9 +119,9 @@ struct afs_dir_page { }; struct afs_lookup_cookie { + struct dir_context ctx; struct afs_fid fid; - const char *name; - size_t nlen; + struct qstr name; int found; }; @@ -228,20 +228,18 @@ static int afs_dir_open(struct inode *inode, struct file *file) /* * deal with one block in an AFS directory */ -static int afs_dir_iterate_block(unsigned *fpos, +static int afs_dir_iterate_block(struct dir_context *ctx, union afs_dir_block *block, - unsigned blkoff, - void *cookie, - filldir_t filldir) + unsigned blkoff) { union afs_dirent *dire; unsigned offset, next, curr; size_t nlen; - int tmp, ret; + int tmp; - _enter("%u,%x,%p,,",*fpos,blkoff,block); + _enter("%u,%x,%p,,",(unsigned)ctx->pos,blkoff,block); - curr = (*fpos - blkoff) / sizeof(union afs_dirent); + curr = (ctx->pos - blkoff) / sizeof(union afs_dirent); /* walk through the block, an entry at a time */ for (offset = AFS_DIRENT_PER_BLOCK - block->pagehdr.nentries; @@ -256,7 +254,7 @@ static int afs_dir_iterate_block(unsigned *fpos, _debug("ENT[%Zu.%u]: unused", blkoff / sizeof(union afs_dir_block), offset); if (offset >= curr) - *fpos = blkoff + + ctx->pos = blkoff + next * sizeof(union afs_dirent); continue; } @@ -302,19 +300,15 @@ static int afs_dir_iterate_block(unsigned *fpos, continue; /* found the next entry */ - ret = filldir(cookie, - dire->u.name, - nlen, - blkoff + offset * sizeof(union afs_dirent), + if (!dir_emit(ctx, dire->u.name, nlen, ntohl(dire->u.vnode), - filldir == afs_lookup_filldir ? - ntohl(dire->u.unique) : DT_UNKNOWN); - if (ret < 0) { + ctx->actor == afs_lookup_filldir ? + ntohl(dire->u.unique) : DT_UNKNOWN)) { _leave(" = 0 [full]"); return 0; } - *fpos = blkoff + next * sizeof(union afs_dirent); + ctx->pos = blkoff + next * sizeof(union afs_dirent); } _leave(" = 1 [more]"); @@ -324,8 +318,8 @@ static int afs_dir_iterate_block(unsigned *fpos, /* * iterate through the data blob that lists the contents of an AFS directory */ -static int afs_dir_iterate(struct inode *dir, unsigned *fpos, void *cookie, - filldir_t filldir, struct key *key) +static int afs_dir_iterate(struct inode *dir, struct dir_context *ctx, + struct key *key) { union afs_dir_block *dblock; struct afs_dir_page *dbuf; @@ -333,7 +327,7 @@ static int afs_dir_iterate(struct inode *dir, unsigned *fpos, void *cookie, unsigned blkoff, limit; int ret; - _enter("{%lu},%u,,", dir->i_ino, *fpos); + _enter("{%lu},%u,,", dir->i_ino, (unsigned)ctx->pos); if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(dir)->flags)) { _leave(" = -ESTALE"); @@ -341,13 +335,13 @@ static int afs_dir_iterate(struct inode *dir, unsigned *fpos, void *cookie, } /* round the file position up to the next entry boundary */ - *fpos += sizeof(union afs_dirent) - 1; - *fpos &= ~(sizeof(union afs_dirent) - 1); + ctx->pos += sizeof(union afs_dirent) - 1; + ctx->pos &= ~(sizeof(union afs_dirent) - 1); /* walk through the blocks in sequence */ ret = 0; - while (*fpos < dir->i_size) { - blkoff = *fpos & ~(sizeof(union afs_dir_block) - 1); + while (ctx->pos < dir->i_size) { + blkoff = ctx->pos & ~(sizeof(union afs_dir_block) - 1); /* fetch the appropriate page from the directory */ page = afs_dir_get_page(dir, blkoff / PAGE_SIZE, key); @@ -364,8 +358,7 @@ static int afs_dir_iterate(struct inode *dir, unsigned *fpos, void *cookie, do { dblock = &dbuf->blocks[(blkoff % PAGE_SIZE) / sizeof(union afs_dir_block)]; - ret = afs_dir_iterate_block(fpos, dblock, blkoff, - cookie, filldir); + ret = afs_dir_iterate_block(ctx, dblock, blkoff); if (ret != 1) { afs_dir_put_page(page); goto out; @@ -373,7 +366,7 @@ static int afs_dir_iterate(struct inode *dir, unsigned *fpos, void *cookie, blkoff += sizeof(union afs_dir_block); - } while (*fpos < dir->i_size && blkoff < limit); + } while (ctx->pos < dir->i_size && blkoff < limit); afs_dir_put_page(page); ret = 0; @@ -387,23 +380,10 @@ out: /* * read an AFS directory */ -static int afs_readdir(struct file *file, void *cookie, filldir_t filldir) +static int afs_readdir(struct file *file, struct dir_context *ctx) { - unsigned fpos; - int ret; - - _enter("{%Ld,{%lu}}", - file->f_pos, file_inode(file)->i_ino); - - ASSERT(file->private_data != NULL); - - fpos = file->f_pos; - ret = afs_dir_iterate(file_inode(file), &fpos, - cookie, filldir, file->private_data); - file->f_pos = fpos; - - _leave(" = %d", ret); - return ret; + return afs_dir_iterate(file_inode(file), + ctx, file->private_data); } /* @@ -416,15 +396,16 @@ static int afs_lookup_filldir(void *_cookie, const char *name, int nlen, { struct afs_lookup_cookie *cookie = _cookie; - _enter("{%s,%Zu},%s,%u,,%llu,%u", - cookie->name, cookie->nlen, name, nlen, + _enter("{%s,%u},%s,%u,,%llu,%u", + cookie->name.name, cookie->name.len, name, nlen, (unsigned long long) ino, dtype); /* insanity checks first */ BUILD_BUG_ON(sizeof(union afs_dir_block) != 2048); BUILD_BUG_ON(sizeof(union afs_dirent) != 32); - if (cookie->nlen != nlen || memcmp(cookie->name, name, nlen) != 0) { + if (cookie->name.len != nlen || + memcmp(cookie->name.name, name, nlen) != 0) { _leave(" = 0 [no]"); return 0; } @@ -444,24 +425,18 @@ static int afs_lookup_filldir(void *_cookie, const char *name, int nlen, static int afs_do_lookup(struct inode *dir, struct dentry *dentry, struct afs_fid *fid, struct key *key) { - struct afs_lookup_cookie cookie; - struct afs_super_info *as; - unsigned fpos; + struct afs_super_info *as = dir->i_sb->s_fs_info; + struct afs_lookup_cookie cookie = { + .ctx.actor = afs_lookup_filldir, + .name = dentry->d_name, + .fid.vid = as->volume->vid + }; int ret; _enter("{%lu},%p{%s},", dir->i_ino, dentry, dentry->d_name.name); - as = dir->i_sb->s_fs_info; - /* search the directory */ - cookie.name = dentry->d_name.name; - cookie.nlen = dentry->d_name.len; - cookie.fid.vid = as->volume->vid; - cookie.found = 0; - - fpos = 0; - ret = afs_dir_iterate(dir, &fpos, &cookie, afs_lookup_filldir, - key); + ret = afs_dir_iterate(dir, &cookie.ctx, key); if (ret < 0) { _leave(" = %d [iter]", ret); return ret; -- 2.20.1