4d0fb621d3
Replace bkl with the UDF_I(inode)->i_data_sem rw semaphore in udf_release_file(), udf_symlink(), udf_symlink_filler(), udf_get_block(), udf_block_map(), and udf_setattr(). The rule now is that any operation on regular file's or symlink's extents (or generally allocation information including goal block) needs to hold i_data_sem. This work was supported by a hardware donation from the CE Linux Forum. Signed-off-by: Alessio Igor Bogani <abogani@texware.it> Signed-off-by: Jan Kara <jack@suse.cz>
45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
#ifndef _UDF_I_H
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#define _UDF_I_H
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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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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 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 list_entry(inode, struct udf_inode_info, vfs_inode);
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}
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#endif /* _UDF_I_H) */
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