diff options
| author |   Theodore Ts'o <tytso@mit.edu> | 2020-06-11 10:51:44 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2020-06-11 10:51:44 -0400 |
| commit | 68cd44920d2ccf32dea1502e71dc0175c9663af1 (patch) | |
| tree | 2ced523b89936fe9bca0c37e77c31566ea33f917 /include/linux | |
| parent | ext4: avoid unnecessary transaction starts during writeback (diff) | |
| parent | Documentation/dax: Update DAX enablement for ext4 (diff) | |
| download | wireguard-linux-68cd44920d2ccf32dea1502e71dc0175c9663af1.tar.xz wireguard-linux-68cd44920d2ccf32dea1502e71dc0175c9663af1.zip | |
Enable ext4 support for per-file/directory dax operations
This adds the same per-file/per-directory DAX support for ext4 as was
done for xfs, now that we finally have consensus over what the
interface should be.
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/dcache.h | 2 | ||||
| -rw-r--r-- | include/linux/fs.h | 14 |
2 files changed, 9 insertions, 7 deletions
diff --git a/include/linux/dcache.h b/include/linux/dcache.h index c1488cc84fd9..a81f0c3cf352 100644 --- a/include/linux/dcache.h +++ b/include/linux/dcache.h @@ -177,6 +177,8 @@ struct dentry_operations { #define DCACHE_REFERENCED 0x00000040 /* Recently used, don't discard. */ +#define DCACHE_DONTCACHE 0x00000080 /* Purge from memory on final dput() */ + #define DCACHE_CANT_MOUNT 0x00000100 #define DCACHE_GENOCIDE 0x00000200 #define DCACHE_SHRINK_LIST 0x00000400 diff --git a/include/linux/fs.h b/include/linux/fs.h index 09bcd329c062..92eb6c7dab8e 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2143,6 +2143,8 @@ static inline void kiocb_clone(struct kiocb *kiocb, struct kiocb *kiocb_src, * * I_CREATING New object's inode in the middle of setting up. * + * I_DONTCACHE Evict inode as soon as it is not used anymore. + * * Q: What is the difference between I_WILL_FREE and I_FREEING? */ #define I_DIRTY_SYNC (1 << 0) @@ -2165,6 +2167,7 @@ static inline void kiocb_clone(struct kiocb *kiocb, struct kiocb *kiocb_src, #define I_WB_SWITCH (1 << 13) #define I_OVL_INUSE (1 << 14) #define I_CREATING (1 << 15) +#define I_DONTCACHE (1 << 16) #define I_DIRTY_INODE (I_DIRTY_SYNC | I_DIRTY_DATASYNC) #define I_DIRTY (I_DIRTY_INODE | I_DIRTY_PAGES) @@ -3036,8 +3039,10 @@ extern int inode_needs_sync(struct inode *inode); extern int generic_delete_inode(struct inode *inode); static inline int generic_drop_inode(struct inode *inode) { - return !inode->i_nlink || inode_unhashed(inode); + return !inode->i_nlink || inode_unhashed(inode) || + (inode->i_state & I_DONTCACHE); } +extern void d_mark_dontcache(struct inode *inode); extern struct inode *ilookup5_nowait(struct super_block *sb, unsigned long hashval, int (*test)(struct inode *, void *), @@ -3373,11 +3378,6 @@ extern void setattr_copy(struct inode *inode, const struct iattr *attr); extern int file_update_time(struct file *file); -static inline bool io_is_direct(struct file *filp) -{ - return (filp->f_flags & O_DIRECT) || IS_DAX(filp->f_mapping->host); -} - static inline bool vma_is_dax(const struct vm_area_struct *vma) { return vma->vm_file && IS_DAX(vma->vm_file->f_mapping->host); @@ -3402,7 +3402,7 @@ static inline int iocb_flags(struct file *file) int res = 0; if (file->f_flags & O_APPEND) res |= IOCB_APPEND; - if (io_is_direct(file)) + if (file->f_flags & O_DIRECT) res |= IOCB_DIRECT; if ((file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host)) res |= IOCB_DSYNC; |