redonkable/alistair23-linux
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ext4, jbd2: Provide accessor function for handle credits

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Provide accessor function to get number of credits available in a handle
and use it from ext4. Later, computation of available credits won't be
so straightforward.

Reviewed-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20191105164437.32602-11-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Jan Kara 2019-11-05 17:44:17 +01:00 committed by Theodore Ts'o
parent a413036791
commit a9a8344ee1
4 changed files with 14 additions and 14 deletions
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13
fs/ext4/ext4_jbd2.c
View file

@ -119,8 +119,8 @@ handle_t *__ext4_journal_start_reserved(handle_t *handle, unsigned int line,
return ext4_get_nojournal();
sb = handle->h_journal->j_private;
trace_ext4_journal_start_reserved(sb, handle->h_buffer_credits,
_RET_IP_);
trace_ext4_journal_start_reserved(sb,
jbd2_handle_buffer_credits(handle), _RET_IP_);
err = ext4_journal_check_start(sb);
if (err < 0) {
jbd2_journal_free_reserved(handle);
@ -138,10 +138,10 @@ int __ext4_journal_ensure_credits(handle_t *handle, int check_cred,
{
if (!ext4_handle_valid(handle))
return 0;
if (handle->h_buffer_credits >= check_cred)
if (jbd2_handle_buffer_credits(handle) >= check_cred)
return 0;
return ext4_journal_extend(handle,
extend_cred - handle->h_buffer_credits);
extend_cred - jbd2_handle_buffer_credits(handle));
}
static void ext4_journal_abort_handle(const char *caller, unsigned int line,
@ -289,7 +289,7 @@ int __ext4_handle_dirty_metadata(const char *where, unsigned int line,
handle->h_type,
handle->h_line_no,
handle->h_requested_credits,
handle->h_buffer_credits, err);
jbd2_handle_buffer_credits(handle), err);
return err;
}
ext4_error_inode(inode, where, line,
@ -300,7 +300,8 @@ int __ext4_handle_dirty_metadata(const char *where, unsigned int line,
handle->h_type,
handle->h_line_no,
handle->h_requested_credits,
handle->h_buffer_credits, err);
jbd2_handle_buffer_credits(handle),
err);
}
} else {
if (inode)

7
fs/ext4/ext4_jbd2.h
View file

@ -288,13 +288,6 @@ static inline int ext4_handle_is_aborted(handle_t *handle)
return 0;
}
static inline int ext4_handle_has_enough_credits(handle_t *handle, int needed)
{
if (ext4_handle_valid(handle) && handle->h_buffer_credits < needed)
return 0;
return 1;
}
#define ext4_journal_start_sb(sb, type, nblocks) \
__ext4_journal_start_sb((sb), __LINE__, (type), (nblocks), 0)

2
fs/ext4/xattr.c
View file

@ -2314,7 +2314,7 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
flags & XATTR_CREATE);
brelse(bh);
if (!ext4_handle_has_enough_credits(handle, credits)) {
if (jbd2_handle_buffer_credits(handle) < credits) {
error = -ENOSPC;
goto cleanup;
}

6
include/linux/jbd2.h
View file

@ -1645,6 +1645,12 @@ static inline tid_t jbd2_get_latest_transaction(journal_t *journal)
return tid;
}
static inline int jbd2_handle_buffer_credits(handle_t *handle)
{
return handle->h_buffer_credits;
}
#ifdef __KERNEL__
#define buffer_trace_init(bh) do {} while (0)