Lines Matching +full:data +full:- +full:mirror

1 .. SPDX-License-Identifier: GPL-2.0
8 extent mappings. Instead of block-by-block mapping (such as bmap), fiemap
13 --------------
32 which the process would like mappings for. Extents returned mirror
33 those on disk - that is, the logical offset of the 1st returned extent
61   extended attribute lookup tree, instead of its data tree.
65 --------------
93 All offsets and lengths are in bytes and mirror those on disk.  It is valid
112 for inline or tail-packed data can key on the specific flag. Software
113 which simply cares not to try operating on non-aligned extents
116 data. Note that the opposite is not true - it would be valid for
123   (via fiemap->fm_length).
127   the data is stored on an inaccessible volume or that no storage has
133   Delayed allocation - while there is data for this extent, its
138   encoded (e.g. encrypted or compressed).  Reading the data in this
141 Note that it is *always* undefined to try to update the data
142 in-place by writing to the indicated location without the
143 assistance of the filesystem, or to access the data using the
146 extent data via I/O to the block device while the filesystem is
153   The data in this extent has been encrypted by the file system.
160   Data is located within a meta data block.
164   Data is packed into a block with data from other files.
167   Unwritten extent - the extent is allocated but its data has not been
168   initialized.  This indicates the extent's data will be all zero if read
179 VFS -> File System Implementation
180 ---------------------------------
182 File systems wishing to support fiemap must implement a ->fiemap callback on
183 their inode_operations structure. The fs ->fiemap call is responsible for
193 ->fiemap is passed struct fiemap_extent_info which describes the
208 Flag checking should be done at the beginning of the ->fiemap callback via the
217 fieinfo->fi_flags and return -EBADR. If the file system gets -EBADR, from
235 user-supplied fm_extents array is full. If an error is encountered
236 while copying the extent to user memory, -EFAULT will be returned.