}
/**
- * gfs2_truncatei - make a file a give size
+ * gfs2_truncatei - make a file a given size
* @ip: the inode
* @size: the size to make the file
* @truncator: function to truncate the last partial block
return 0;
}
-/**
- * do_gfm - Copy out the dinode/indirect blocks of a file
- * @ip: the file
- * @dibh: the dinode buffer
- * @bh: the indirect buffer we're looking at
- * @top: the first pointer in the block
- * @bottom: one more than the last pointer in the block
- * @height: the height the block is at
- * @data: a pointer to a struct gfs2_user_buffer structure
- *
- * If this is a journaled file, copy out the data too.
- *
- * Returns: errno
- */
-
-static int do_gfm(struct gfs2_inode *ip, struct buffer_head *dibh,
- struct buffer_head *bh, uint64_t *top, uint64_t *bottom,
- unsigned int height, void *data)
-{
- struct gfs2_user_buffer *ub = (struct gfs2_user_buffer *)data;
- int error;
-
- error = gfs2_add_bh_to_ub(ub, bh);
- if (error)
- return error;
-
- if (!S_ISDIR(ip->i_di.di_mode) ||
- height + 1 != ip->i_di.di_height)
- return 0;
-
- for (; top < bottom; top++)
- if (*top) {
- struct buffer_head *data_bh;
-
- error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*top),
- DIO_START | DIO_WAIT,
- &data_bh);
- if (error)
- return error;
-
- error = gfs2_add_bh_to_ub(ub, data_bh);
-
- brelse(data_bh);
-
- if (error)
- return error;
- }
-
- return 0;
-}
-
-/**
- * gfs2_get_file_meta - return all the metadata for a file
- * @ip: the file
- * @ub: the structure representing the meta
- *
- * Returns: errno
- */
-
-int gfs2_get_file_meta(struct gfs2_inode *ip, struct gfs2_user_buffer *ub)
-{
- int error;
-
- if (gfs2_is_stuffed(ip)) {
- struct buffer_head *dibh;
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (!error) {
- error = gfs2_add_bh_to_ub(ub, dibh);
- brelse(dibh);
- }
- } else {
- struct metapath mp;
- find_metapath(ip, 0, &mp);
- error = recursive_scan(ip, NULL, &mp, 0, 0, 1, do_gfm, ub);
- }
-
- return error;
-}
-
int gfs2_write_alloc_required(struct gfs2_inode *ip, uint64_t offset,
unsigned int len, int *alloc_required);
-int gfs2_get_file_meta(struct gfs2_inode *ip, struct gfs2_user_buffer *ub);
-
#endif /* __BMAP_DOT_H__ */
return error;
}
-/**
- * do_gdm - copy out one leaf (or list of leaves)
- * @dip: the directory
- * @index: the hash table offset in the directory
- * @len: the number of pointers to this leaf
- * @leaf_no: the leaf number
- * @data: a pointer to a struct gfs2_user_buffer structure
- *
- * Returns: errno
- */
-
-static int do_gdm(struct gfs2_inode *dip, uint32_t index, uint32_t len,
- uint64_t leaf_no, void *data)
-{
- struct gfs2_user_buffer *ub = (struct gfs2_user_buffer *)data;
- struct gfs2_leaf leaf;
- struct buffer_head *bh;
- uint64_t blk;
- int error = 0;
-
- for (blk = leaf_no; blk; blk = leaf.lf_next) {
- error = get_leaf(dip, blk, &bh);
- if (error)
- break;
-
- gfs2_leaf_in(&leaf, bh->b_data);
-
- error = gfs2_add_bh_to_ub(ub, bh);
-
- brelse(bh);
-
- if (error)
- break;
- }
-
- return error;
-}
-
-/**
- * gfs2_get_dir_meta - return all the leaf blocks of a directory
- * @dip: the directory
- * @ub: the structure representing the meta
- *
- * Returns: errno
- */
-
-int gfs2_get_dir_meta(struct gfs2_inode *dip, struct gfs2_user_buffer *ub)
-{
- return foreach_leaf(dip, do_gdm, ub);
-}
-
int gfs2_diradd_alloc_required(struct gfs2_inode *dip, struct qstr *filename,
int *alloc_required);
-int gfs2_get_dir_meta(struct gfs2_inode *ip, struct gfs2_user_buffer *ub);
-
#endif /* __DIR_DOT_H__ */
return error;
}
-/**
- * gfs2_get_eattr_meta - return all the eattr blocks of a file
- * @dip: the directory
- * @ub: the structure representing the user buffer to copy to
- *
- * Returns: errno
- */
-
-int gfs2_get_eattr_meta(struct gfs2_inode *ip, struct gfs2_user_buffer *ub)
-{
- struct buffer_head *bh;
- int error;
-
- error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
- DIO_START | DIO_WAIT, &bh);
- if (error)
- return error;
-
- gfs2_add_bh_to_ub(ub, bh);
-
- if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
- struct buffer_head *eabh;
- uint64_t *eablk, *end;
-
- if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_IN)) {
- error = -EIO;
- goto out;
- }
-
- eablk = (uint64_t *)(bh->b_data +
- sizeof(struct gfs2_meta_header));
- end = eablk + ip->i_sbd->sd_inptrs;
-
- for (; eablk < end; eablk++) {
- uint64_t bn;
-
- if (!*eablk)
- break;
- bn = be64_to_cpu(*eablk);
-
- error = gfs2_meta_read(ip->i_gl, bn,
- DIO_START | DIO_WAIT, &eabh);
- if (error)
- break;
- gfs2_add_bh_to_ub(ub, eabh);
- brelse(eabh);
- if (error)
- break;
- }
- }
-
- out:
- brelse(bh);
-
- return error;
-}
-
int gfs2_ea_dealloc(struct gfs2_inode *ip);
-int gfs2_get_eattr_meta(struct gfs2_inode *ip, struct gfs2_user_buffer *ub);
-
/* Exported to acl.c */
int gfs2_ea_find(struct gfs2_inode *ip,
return rv;
}
-/**
- * gfs2_add_bh_to_ub - copy a buffer up to user space
- * @ub: the structure representing where to copy
- * @bh: the buffer
- *
- * Returns: errno
- */
-
-int gfs2_add_bh_to_ub(struct gfs2_user_buffer *ub, struct buffer_head *bh)
-{
- uint64_t blkno = bh->b_blocknr;
-
- if (ub->ub_count + sizeof(uint64_t) + bh->b_size > ub->ub_size)
- return -ENOMEM;
-
- if (copy_to_user(ub->ub_data + ub->ub_count,
- &blkno,
- sizeof(uint64_t)))
- return -EFAULT;
- ub->ub_count += sizeof(uint64_t);
-
- if (copy_to_user(ub->ub_data + ub->ub_count,
- bh->b_data,
- bh->b_size))
- return -EFAULT;
- ub->ub_count += bh->b_size;
-
- return 0;
-}
-
void gfs2_icbit_munge(struct gfs2_sbd *sdp, unsigned char **bitmap,
unsigned int bit, int new_value)
{
extern kmem_cache_t *gfs2_inode_cachep;
extern kmem_cache_t *gfs2_bufdata_cachep;
-struct gfs2_user_buffer {
- char __user *ub_data;
- unsigned int ub_size;
- unsigned int ub_count;
-};
-
-int gfs2_add_bh_to_ub(struct gfs2_user_buffer *ub, struct buffer_head *bh);
-
static inline unsigned int gfs2_tune_get_i(struct gfs2_tune *gt,
unsigned int *p)
{
projects / linux-2.6-block.git / commitdiff