forked from Minki/linux
e02119d5a7
File syncs and directory syncs are optimized by copying their items into a special (copy-on-write) log tree. There is one log tree per subvolume and the btrfs super block points to a tree of log tree roots. After a crash, items are copied out of the log tree and back into the subvolume. See tree-log.c for all the details. Signed-off-by: Chris Mason <chris.mason@oracle.com>
61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
#ifndef _COMPAT_H_
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#define _COMPAT_H_
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#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,26)
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#define trylock_page(page) (!TestSetPageLocked(page))
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#endif
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#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,27)
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static inline struct dentry *d_obtain_alias(struct inode *inode)
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{
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struct dentry *d;
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if (!inode)
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return NULL;
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if (IS_ERR(inode))
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return ERR_CAST(inode);
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d = d_alloc_anon(inode);
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if (!d)
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iput(inode);
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return d;
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}
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#endif
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#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
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static inline void btrfs_drop_nlink(struct inode *inode)
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{
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inode->i_nlink--;
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}
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static inline void btrfs_inc_nlink(struct inode *inode)
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{
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inode->i_nlink++;
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}
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#else
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# define btrfs_drop_nlink(inode) drop_nlink(inode)
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# define btrfs_inc_nlink(inode) inc_nlink(inode)
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#endif
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/*
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* Even if AppArmor isn't enabled, it still has different prototypes.
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* Add more distro/version pairs here to declare which has AppArmor applied.
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*/
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#if defined(CONFIG_SUSE_KERNEL)
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# if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
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# define REMOVE_SUID_PATH 1
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# endif
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#endif
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/*
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* catch any other distros that have patched in apparmor. This isn't
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* 100% reliable because it won't catch people that hand compile their
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* own distro kernels without apparmor compiled in. But, it is better
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* than nothing.
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*/
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#ifdef CONFIG_SECURITY_APPARMOR
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# define REMOVE_SUID_PATH 1
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#endif
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#endif /* _COMPAT_H_ */
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