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nexedi
linux
Commits
48bde8d3
Commit
48bde8d3
authored
Jul 03, 2013
by
Al Viro
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Document ->tmpfile()
Signed-off-by:
Al Viro
<
viro@zeniv.linux.org.uk
>
parent
af51a2ac
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Documentation/filesystems/Locking
Documentation/filesystems/Locking
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Documentation/filesystems/vfs.txt
Documentation/filesystems/vfs.txt
+5
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Documentation/filesystems/Locking
View file @
48bde8d3
...
@@ -64,6 +64,7 @@ prototypes:
...
@@ -64,6 +64,7 @@ prototypes:
int (*atomic_open)(struct inode *, struct dentry *,
int (*atomic_open)(struct inode *, struct dentry *,
struct file *, unsigned open_flag,
struct file *, unsigned open_flag,
umode_t create_mode, int *opened);
umode_t create_mode, int *opened);
int (*tmpfile) (struct inode *, struct dentry *, umode_t);
locking rules:
locking rules:
all may block
all may block
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@@ -91,6 +92,7 @@ removexattr: yes
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@@ -91,6 +92,7 @@ removexattr: yes
fiemap: no
fiemap: no
update_time: no
update_time: no
atomic_open: yes
atomic_open: yes
tmpfile: no
Additionally, ->rmdir(), ->unlink() and ->rename() have ->i_mutex on
Additionally, ->rmdir(), ->unlink() and ->rename() have ->i_mutex on
victim.
victim.
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...
Documentation/filesystems/vfs.txt
View file @
48bde8d3
...
@@ -360,6 +360,8 @@ struct inode_operations {
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@@ -360,6 +360,8 @@ struct inode_operations {
int (*removexattr) (struct dentry *, const char *);
int (*removexattr) (struct dentry *, const char *);
void (*update_time)(struct inode *, struct timespec *, int);
void (*update_time)(struct inode *, struct timespec *, int);
int (*atomic_open)(struct inode *, struct dentry *,
int (*atomic_open)(struct inode *, struct dentry *,
int (*tmpfile) (struct inode *, struct dentry *, umode_t);
} ____cacheline_aligned;
struct file *, unsigned open_flag,
struct file *, unsigned open_flag,
umode_t create_mode, int *opened);
umode_t create_mode, int *opened);
};
};
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@@ -472,6 +474,9 @@ otherwise noted.
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@@ -472,6 +474,9 @@ otherwise noted.
component is negative or needs lookup. Cached positive dentries are
component is negative or needs lookup. Cached positive dentries are
still handled by f_op->open().
still handled by f_op->open().
tmpfile: called in the end of O_TMPFILE open(). Optional, equivalent to
atomically creating, opening and unlinking a file in given directory.
The Address Space Object
The Address Space Object
========================
========================
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