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https://github.com/torvalds/linux
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db6172c411
list_entry is just a wrapper for container_of, but it is arguably wrong (and slightly confusing) to use it when the pointed-to struct member is not a struct list_head. Use container_of directly instead. Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
#ifndef _UDF_I_H
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#define _UDF_I_H
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struct extent_position {
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struct buffer_head *bh;
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uint32_t offset;
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struct kernel_lb_addr block;
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};
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struct udf_ext_cache {
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/* Extent position */
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struct extent_position epos;
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/* Start logical offset in bytes */
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loff_t lstart;
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};
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/*
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* The i_data_sem and i_mutex serve for protection of allocation information
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* of a regular files and symlinks. This includes all extents belonging to
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* the file/symlink, a fact whether data are in-inode or in external data
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* blocks, preallocation, goal block information... When extents are read,
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* i_mutex or i_data_sem must be held (for reading is enough in case of
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* i_data_sem). When extents are changed, i_data_sem must be held for writing
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* and also i_mutex must be held.
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*
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* For directories i_mutex is used for all the necessary protection.
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*/
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struct udf_inode_info {
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struct timespec i_crtime;
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/* Physical address of inode */
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struct kernel_lb_addr i_location;
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__u64 i_unique;
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__u32 i_lenEAttr;
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__u32 i_lenAlloc;
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__u64 i_lenExtents;
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__u32 i_next_alloc_block;
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__u32 i_next_alloc_goal;
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__u32 i_checkpoint;
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unsigned i_alloc_type : 3;
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unsigned i_efe : 1; /* extendedFileEntry */
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unsigned i_use : 1; /* unallocSpaceEntry */
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unsigned i_strat4096 : 1;
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unsigned reserved : 26;
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union {
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struct short_ad *i_sad;
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struct long_ad *i_lad;
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__u8 *i_data;
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} i_ext;
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struct rw_semaphore i_data_sem;
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struct udf_ext_cache cached_extent;
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/* Spinlock for protecting extent cache */
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spinlock_t i_extent_cache_lock;
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struct inode vfs_inode;
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};
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static inline struct udf_inode_info *UDF_I(struct inode *inode)
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{
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return container_of(inode, struct udf_inode_info, vfs_inode);
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}
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#endif /* _UDF_I_H) */
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